Recombinant Nucleic Acid Construct Encoding Influenza Peptides and Compositions

Abstract

The present specification discloses recombinant nucleic acid constructs encoding an immunogenic multiepitope polypeptide comprising two or more polypeptides, recombinant nucleic acid constructs encoding at least two epitopes from two or more internal proteins of influenza virus, compositions comprising such recombinant nucleic acid constructs and methods of eliciting a T cell immune response against an influenza virus in a vertebrate using such recombinant nucleic acid constructs and compositions.

Claims

1. A recombinant nucleic acid construct encoding a multiepitope polypeptide, the multiepitope polypeptide comprising two or more polypeptides, wherein the two or more polypeptides include a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 1 or a fragment of SEQ ID NO: 1 having 8 or more consecutive amino acids from SEQ ID NO: 1, a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 2 or a fragment of SEQ ID NO: 2 having 8 or more consecutive amino acids from SEQ ID NO: 2, a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 3 or a fragment of SEQ ID NO: 3 having 8 or more consecutive amino acids from SEQ ID NO: 3, a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 4 or a fragment of SEQ ID NO: 4 having 8 or more consecutive amino acids from SEQ ID NO: 4, a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 5 or a fragment of SEQ ID NO: 5 having 8 or more consecutive amino acids from SEQ ID NO: 5, or a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 6 or a fragment of SEQ ID NO: 6 having 8 or more consecutive amino acids from SEQ ID NO: 6, wherein, the two or more polypeptides are immunogenic to one or more influenza strains in a vertebrate expressing a major histocompatibility complex (MHC) allele, and wherein the two or more isolated polypeptides are not a complete influenza virus protein.

2. The construct according to claim 1, wherein the two or more polypeptides comprise a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 1 or a fragment of SEQ ID NO: 1 having 8 or more consecutive amino acids from SEQ ID NO: 1, a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 2 or a fragment of SEQ ID NO: 2 having 8 or more consecutive amino acids from SEQ ID NO: 2, a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 3 or a fragment of SEQ ID NO: 3 having 8 or more consecutive amino acids from SEQ ID NO: 3, a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 4 or a fragment of SEQ ID NO: 4 having 8 or more consecutive amino acids from SEQ ID NO: 4, a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 5 or a fragment of SEQ ID NO: 5 having 8 or more consecutive amino acids from SEQ ID NO: 5, and a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 6 or a fragment of SEQ ID NO: 6 having 8 or more consecutive amino acids from SEQ ID NO: 6.

3. The construct according to claim 1, wherein the two or more polypeptides comprise a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 1 or a fragment of SEQ ID NO: 1 having 8 or more consecutive amino acids from SEQ ID NO: 1, a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 3 or a fragment of SEQ ID NO: 3 having 8 or more consecutive amino acids from SEQ ID NO: 3, a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 4 or a fragment of SEQ ID NO: 4 having 8 or more consecutive amino acids from SEQ ID NO: 4, and a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 6 or a fragment of SEQ ID NO: 6 having 8 or more consecutive amino acids from SEQ ID NO: 6.

4. The construct according to claim 1, wherein the two or more polypeptides comprise a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 1 or a fragment of SEQ ID NO: 1 having 9 or more consecutive amino acids from SEQ ID NO: 1, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 2 or a fragment of SEQ ID NO: 2 having 9 or more consecutive amino acids from SEQ ID NO: 2, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 3 or a fragment of SEQ ID NO: 3 having 9 or more consecutive amino acids from SEQ ID NO: 3, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 4 or a fragment of SEQ ID NO: 4 having 9 or more consecutive amino acids from SEQ ID NO: 4, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 5 or a fragment of SEQ ID NO: 5 having 9 or more consecutive amino acids from SEQ ID NO: 5, or a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 6 or a fragment of SEQ ID NO: 6 having 9 or more consecutive amino acids from SEQ ID NO: 6.

5. The construct according to claim 4, wherein the two or more polypeptides comprise a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 1 or a fragment of SEQ ID NO: 1 having 9 or more consecutive amino acids from SEQ ID NO: 1, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 2 or a fragment of SEQ ID NO: 2 having 9 or more consecutive amino acids from SEQ ID NO: 2, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 3 or a fragment of SEQ ID NO: 3 having 9 or more consecutive amino acids from SEQ ID NO: 3, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 4 or a fragment of SEQ ID NO: 4 having 9 or more consecutive amino acids from SEQ ID NO: 4, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 5 or a fragment of SEQ ID NO: 5 having 9 or more consecutive amino acids from SEQ ID NO: 5, and a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 6 or a fragment of SEQ ID NO: 6 having 9 or more consecutive amino acids from SEQ ID NO: 6.

6. The construct according to claim 4, wherein the two or more polypeptides comprise a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 1 or a fragment of SEQ ID NO: 1 having 9 or more consecutive amino acids from SEQ ID NO: 1, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 3 or a fragment of SEQ ID NO: 3 having 9 or more consecutive amino acids from SEQ ID NO: 3, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 4 or a fragment of SEQ ID NO: 4 having 9 or more consecutive amino acids from SEQ ID NO: 4, and a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 6 or a fragment of SEQ ID NO: 6 having 9 or more consecutive amino acids from SEQ ID NO: 6.

7. The construct according to claim 1, wherein the two or more polypeptides comprise a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 1, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 2, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 3, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 4, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 5, or a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 6.

8. The construct according to claim 7, wherein the two or more polypeptides comprise a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 1, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 2, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 3, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 4, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 5, and a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 6.

9. The construct according to claim 7, wherein the two or more polypeptides comprise a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 1, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 3, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 4, and a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 6.

10. The composition according to claim 1, wherein the two or more polypeptides comprise a polypeptide comprising SEQ ID NO: 1, a polypeptide comprising SEQ ID NO: 2, a polypeptide comprising SEQ ID NO: 3, a polypeptide comprising SEQ ID NO: 4, a polypeptide comprising SEQ ID NO: 5, or a polypeptide comprising SEQ ID NO: 6.

11. The composition according to claim 10, wherein the two or more polypeptides comprise a polypeptide comprising SEQ ID NO: 1, a polypeptide comprising SEQ ID NO: 2, a polypeptide comprising SEQ ID NO: 3, a polypeptide comprising SEQ ID NO: 4, a polypeptide comprising SEQ ID NO: 5, and a polypeptide comprising SEQ ID NO: 6.

12. The composition according to claim 10, wherein the two or more polypeptides comprise a polypeptide comprising SEQ ID NO: 1, a polypeptide comprising SEQ ID NO: 3, a polypeptide comprising SEQ ID NO: 4, and a polypeptide comprising SEQ ID NO: 6.

13. The composition according to claim 1, wherein the one or more influenza strains includes an influenza A strain, an influenza B strain, or both an influenza A strain and an influenza B strain.

14. A pharmaceutical composition comprising a recombinant nucleic acid construct of claim 1 and an adjuvant.

15. A recombinant nucleic acid construct encoding a polypeptide, the polypeptide being from 8 to 50 amino acids in length and selected from a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 1 or a fragment of SEQ ID NO: 1 having 8 or more consecutive amino acids from SEQ ID NO: 1, a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 2 or a fragment of SEQ ID NO: 2 having 8 or more consecutive amino acids from SEQ ID NO: 2, a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 3 or a fragment of SEQ ID NO: 3 having 8 or more consecutive amino acids from SEQ ID NO: 3, a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 4 or a fragment of SEQ ID NO: 4 having 8 or more consecutive amino acids from SEQ ID NO: 4, a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 5 or a fragment of SEQ ID NO: 5 having 8 or more consecutive amino acids from SEQ ID NO: 5, or a polypeptide comprising an amino acid sequence with 85% or more amino acid sequence identity to SEQ ID NO: 6 or a fragment of SEQ ID NO: 6 having 8 or more consecutive amino acids from SEQ ID NO: 6.

16. The construct according to claim 15, wherein the polypeptide comprises a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 1 or a fragment of SEQ ID NO: 1 having 9 or more consecutive amino acids from SEQ ID NO: 1, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 2 or a fragment of SEQ ID NO: 2 having 9 or more consecutive amino acids from SEQ ID NO: 2, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 3 or a fragment of SEQ ID NO: 3 having 9 or more consecutive amino acids from SEQ ID NO: 3, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 4 or a fragment of SEQ ID NO: 4 having 9 or more consecutive amino acids from SEQ ID NO: 4, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 5 or a fragment of SEQ ID NO: 5 having 9 or more consecutive amino acids from SEQ ID NO: 5, or a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 6 or a fragment of SEQ ID NO: 6 having 9 or more consecutive amino acids from SEQ ID NO: 6.

17. The construct according to claim 16, wherein the polypeptide comprises a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 1, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 2, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 3, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 4, a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 5, or a polypeptide comprising an amino acid sequence with 95% or more amino acid sequence identity to SEQ ID NO: 6.

18. The composition according to claim 17, wherein the polypeptide comprises a polypeptide comprising SEQ ID NO: 1, a polypeptide comprising SEQ ID NO: 2, a polypeptide comprising SEQ ID NO: 3, a polypeptide comprising SEQ ID NO: 4, a polypeptide comprising SEQ ID NO: 5, or a polypeptide comprising SEQ ID NO: 6.

19. A pharmaceutical composition comprising a recombinant nucleic acid construct of claim 15 and an adjuvant.

20. The composition according to claim 19, which is immunogenic to one or more influenza virus strains.

Description

[0043] The present invention will be described in more detail by way of example only with reference to the following Figures, in which:

[0044] FIG. 1A to 1F show IFN-γ production by primary splenocyte cultures of FLU-v and NRP vaccinated mice stimulated with Con A (10 μg/ml), soluble Lysozyme (5 μg/ml), purified soluble polypeptides (P1 (FIG. 1A), P2 (FIG. 1B), P3 (FIG. 1C), P4 (FIG. 1D), P5 (FIG. 1E) and P6 (FIG. 1F); 5 μg/ml) and HLA-matched T1 (T1) and mismatched JURKAT (Ju) human cells transfected with either Lysozyme, P1, P2, P3, P4, P5 or P6 according to the protocol described in Example 1 below (splenocyte to transfected cell ratio is 10:1). IFN-γ production is represented as the differential between the level of production in response to the antigen considered minus the IFN-γ produced in response to either soluble Lysozyme or the corresponding cell transfected with Lysozyme. Background levels of Lysozyme mediated production of IFN-γ were for soluble antigen 25±10 μg/ml, for antigen in T1 316±43 μg/ml, and for antigen in Jurkat 19±6 μg/ml;

[0045] FIG. 2 shows IFN-γ production by primary splenocyte cultures of FLU-v and NRP vaccinated mice stimulated with Con A (10 μg/ml), soluble Lysozyme (5 μg/ml), purified soluble FLU-v polypeptide preparation (P1, P2, P3, P4, P5 and P6 all together at 5 μg/ml) and HLA-matched T1 (T1) and mismatched JURKAT (Ju) human cells either infected with influenza strains A/New_Calcdonia/20/99, A/NYMC/X-147 or B/Johannesburg/5/99 or transfected with Lysozyme according to the protocol described in Example 1 below (splenocyte to infected/transfected cell ratio is 10:1); IFN-γ production is represented as the differential between the level of production in response to the antigen considered minus the IFN-γ produced in response to either soluble Lysozyme or the corresponding cell transfected with Lysozyme; background levels of Lysozyme mediated production of IFN-γ were for soluble antigen 25±10 μg/ml, for antigen in T1 316±43 μg/ml, and for antigen in Jurkat 19±6 μg/ml; and

[0046] FIGS. 3A and 3B show survival of animals following a lethal challenge with Influenza A/PR/8/34; animals were immunised subcutaneously with either FLU-v or NRP-v on days 1 and 15 and on day 20 all were challenged intranasally with 45 μl of the virus (5×10.sup.7 pfu per dose) under anaesthesia; animals in FIG. 3A were inoculated intraperitoneally with 100 μg of rat anti-mouse CD8 sera on days 19 and 22; animals in FIG. 3B were inoculated intraperitoneally with an irrelevant rat sera on days 19 and 22; the arrow indicates the date of intranasal challenge whilst the diamonds indicate the date animals were inoculated with the anti-CD8 sera.

[0047] FIG. 4 shows Scheme 1 inoculation.

[0048] FIG. 5 shows Scheme 2—control test for T1 and JURKAT.

[0049] FIG. 6 shows Scheme 3—FLU-v test for T1 and JURKAT.

[0050] The polypeptide described above typically comprises one or more (preferably two or more) epitopes. These epitopes are preferably T cell epitopes, such as cytotoxic T lymphocyte (CTL) epitopes. Generally the polypeptide is immunogenic to an influenza virus strain, and preferably to a plurality of influenza virus strains. In the present context, a polypeptide immunogenic to an influenza virus strain is understood to mean a polypeptide that is part of an influenza virus protein and that elicits an immune system response, such as by exhibiting CTL reactivity when bound to an MHC. One method for determining whether a polypeptide possesses such immunogenicity is set out in Experiment 1 below. However, the present invention is not limited to such methods, and the skilled person may select any known method for determining immunogenicity, as desired.

[0051] In the present invention, the polypeptide comprises two or more sequences as described above. Typically, two, three, four, five or more such sequences may be present in the polypeptide, if desired. The more such epitopes are present, the greater the breadth of protection afforded within a population of humans and/or animals individuals with differing HLAs or MHCs.

[0052] The polypeptide according to the present invention may also comprise one or more further sequences that are not epitopes, if desired. Typically the further sequences are from one or more influenza virus proteins. These sequences may be situated between two or more of the sequences (the epitopes) described above, or may be situated at one or both ends of the polypeptide. The presence of such further sequences should not affect the function of the polypeptide, provided that the polypeptide as a whole does not become too large, interfering with the presentation of the epitopes in the vertebrate's immune system. In specific embodiments of the invention, when the polypeptide is homologous to SEQ ID 1, the further sequences are preferably one or more from an influenza M1 protein (preferably from an influenza A strain), when the polypeptide is homologous to SEQ ID 2, the further sequences are preferably one or more from an influenza M1 protein (preferably from an influenza B strain), when the polypeptide is homologous to SEQ ID 3, the further sequences are preferably one or more from an influenza NP protein (preferably from an influenza A strain), when the polypeptide is homologous to SEQ ID 4, the further sequences are preferably one or more from an influenza NP protein (preferably from an influenza B strain), when the polypeptide is homologous to SEQ ID 5, the further sequences are preferably one or more from an influenza PB1 protein, and when the polypeptide is homologous to SEQ ID 6, the further sequences are preferably one or more from an influenza M2 protein.

[0053] In the most preferred embodiments, the further sequences from the above-mentioned proteins are ones within the following consensus sequences, or ones having at least 60% homology with a sequence within the following consensus sequences:

TABLE-US-00003 M1 Influenza A Consensus SEQ ID 7 MSLLTEVETYVLSIVPSGPLKAEIAQRLEDVFAGK NTDLEALMEWLKTRPILSPLTKGILGFVFTLTVPS ERGLQRRRFVQNALNGNGDPNNMDKAVKLYRKLKR EITFHGAKEIALSYSAGALASCMGLIYNRMGAVTT EVAFGLVCATCEQIADSQHRSHRQMVATTNPLIKH ENRMVLASTTAKAMEQMAGSSEQAAEAMEIASQAR QMVQAMRTVGTHPSSSTGLRDDLLENLQTYQKRMG VQMQRFK M1 Influenza B Consensus SEQ ID 8 MSLFGDTIAYLLSLTEDGEGKAELAEKLHCWFGGK EFDLDSALEWIKNKRCLTDIQKALIGASICFLKPK DQERKRRFITEPLSGMGTTATKKKGLILAERKMRR CVSFHEAFEIAEGHESSALLYCLMVMYLNPGNYSM QVKLGTLCALCEKQASHSHRAHSRAARSSVPGVRR EMQMVSAMNTAKTMNGMGKGEDVQKLAEELQSNIG VLRSLGASQKNGEGIAKDVMEVLKQSSMGNSALVK KYL NP Influenza A Consensus SEQ ID 9 MASQGTKRSYEQMETDGDRQNATEIRASVGKMIDG IGRFYIQMCTELKLSDYEGRLIQNSLTIEKMVLSA FDERRNRYLEEHPSAGKDPKKTGGPIYRRVDGKWM RELVLYDKEEIRRIWRQANNGEDATAGLTHMMIWH SNLNDATYQRTRALVRTGMDPRMCSLMQGSTLPRR SGAAGAAVKGIGTMVMELIRMIKRGINDRNFWRGE NGRKTRSAYERMCNILKGKFQTAAQRAMVDQVRES RNPGNAEIEDLIFLARSALILRGSVAHKSCLPACV YGPAVSSGYDFEKEGYSLVGIDPFKLLQNSQVYSL IRPNENPAHKSQLVWMACHSAAFEDLRLLSFIRGT KVSPRGKLSTRGVQIASNENMDNMGSSTLELRSGY WAIRTRSGGNTNQQRASAGQISVQPTESVQRNLPF EKSTVMAAFTGNTEGRTSDMRAEIIRMMEGAKPEE VSFRGRGVFELSDEKATNPIVPSFDMSNEGSYFFG DNAEEYDN NP Influenza B Consensus SEQ ID 10 MSNMDIDGINTGTIDKTPEEITSGTSGTTRPIIRP ATLAPPSNKRTRNPSPERATTSSEADVGRKTQKKQ TPTEIKKSVYNMVVKLGEFYNQMMVKAGLNDDMER NLIQNAHAVERILLAATDDKKTEFQKKKNARDVKE GKEEIDHNKTGGTEYKMVRDDKTIYFSPIRITFLK EEVKTMYKTTMGSDGFSGLNHIMIGHSQMNDVCFO RSKALKRVGLDPSLISTFAGSTLPRRSGATGVAIK GGGTLVAEAIRFIGRAMADRGLLRDIKAKTAYEKI LLNLKNKCSAPQQKALVDQVIGSRNPGIADIEDLT LLARSMVVVRPSVASKVVLPISIYAKIPQLGFNVE EYSMVGYEAMALYNMATPVSILRMGDDAKDKSQLF FMSCFGAAYEDLRVLSALTGTEFKPRSALKCKGFH VPAKEQVEGMGAALMSIKLQFWAPMTRSGGNEVGG DGGSGQISCSPVFAVERPIALSKQAVRRMLSMNIE GRDADVKGNLLKMMNDSMAKKTNGNAFIGKKMFQI SDKNKTNPVEIPIKQTIPNFFFGRDTAEDYDDLDY PB1 Influenza Consensus SEQ ID 11 MDVNPTLLFLKVPAQNAISTTFPYTGDPPYSHGTG TGYTMDTVNRTHQYSEKGKWTTNTETGAPQLNPID GPLPEDNEPSGYAQTDCVLEAMAFLEESHPGIFEN SCLETMEVVQQTRVDKLTQGRQTYDWTLNRNQPAA TALANTIEVFRSNGLTANESGRLIDFLKDVMESMD KEEMEITTHFQRKRRVRDNMTKKMVTQRTIGKKKQ RVNKRGYLIRALTLNTMTKDAERGKLKRRAIATPG MQIRGFVYFVETLARSICEKLEQSGLPVGGNEKKA KLANVVRKMMTNSQDTELSFTITGDNTKWNENQNP RMFLAMITYITKNQPEWFRNILSIAPIMFSNKMAR LGKGYMFESKRMKLRTQIPAEMLASIDLKYFNEST RKKIEKIRPLLIDGTASLSPGMMMGMFNMLSTVLG VSILNLGQKKYTKTTYWWDGLQSSDDFALIVNAPN HEGIQAGVDRFYRTCKLVGINMSKKKSYINKTGTF EFTSFFYRYGFVANFSMELPSFGVSGINESADMSI GVTVIKNNMINNDLGPATAQMALQLFIKDYRYTYR CHRGDTQIQTRRSFELKKLWDQTQSKAGLLVSDGG PNLYNIRNLHIPEVCLKWELMDEDYRGRLCNPLNP FVSHKEIESVNNAVVMPAHGPAKSMEYDAVATTHS WIPKRNRSILNTSQRGILEDEQMYQKCCNLFEKFF PSSSYRRPVGISSMVEAMVSRARIDARIDEESGRI KKEEESEIMKICSTIEELRRQKK M2 Influenza Consensus SEQ ID 12 MSLLTEVETPIRNEWGCRCNDSSDPLVVAASIIGI LHLILWILDRLFFKCIYRLFKHGLKRGPSTEGVPE SMREEYRKEQQNAVDADDSHFVSIELE

[0054] The homology referred to above in respect of these sequences is preferably 75%, 85%, 95% or substantially 100%.

[0055] In the present invention, the influenza strain is not especially limited, and the polypeptides may be immunogenic against, and/or derived from, any known influenza strain. Preferably, however, the relevant strain is an Influenza A or Influenza B strain. Future influenza strains that have mutated from any of these existing strains may also be ones against which the polypeptides are immunogenic, or from which the polypeptides are derived.

[0056] The proteins within which the sequences defining the polypeptides of the present invention are situated are selected from M1, NP, PB and M2 proteins from any influenza virus strain (especially A and B strains) (the consensus sequences of which for all analyzed sequences, or alternatively the positions of which within the protein, are described above). The following specific proteins were analyzed by the inventors, and preferably the influenza virus proteins referred to in the invention are selected from these specific proteins, or mutations from these proteins. Thus, the specific sequences homologous to SEQ ID 1-6 described above are preferably the ones at the appropriate positions within the following proteins. Similarly, the sequences of the present invention defined by the residue positions within proteins from any influenza strain, namely residues 36-75 of M1 protein (especially influenza A M1), residues 124-158 of M1 protein (especially in influenza B M1), residues 255-275 of NP protein (especially in influenza A NP), residues 306-326 of NP protein (especially in influenza B NP), residues 395-428 of PB1 protein, and residues 32-55 of M2 protein, are preferably those within the following specific proteins. The list is in the form |version number (gi number)|database identification (e.g. gb for GenBank)|NCBI accession number|optional further information (e.g. the accession number of the nucleotide sequence from which the protein sequence is derived). The sequences and corresponding influenza strains from which they derive can all be found from the public NCBI protein database. The protein database contains sequence data from the translated coding regions from DNA sequences in GenBank, EMBL, and DDBJ as well as protein sequences submitted to Protein Information Resource (PIR), SWISS-PROT, Protein Research Foundation (PRF), and Protein Data Bank (PDB) (sequences from solved structures).

TABLE-US-00004 M1 proteins |27530653|dbj|BAC54009.1|; |27530634|dbj|BAC53998.1|; |53829719|gb|AAU94746.1|; |53829716|gb|AAU94744.1|; |53829713|gb|AAU94742.1|; |53829710|gb|AAU94740.1|; |53829707|gb|AAU94738.1|; |53829704|gb|AAU94736.1|; |53829701|gb|AAU94734.1|; |53829698|gb|AAU94732.1|; |53829695|gb|AAU94730.1|; |53829692|gb|AAU94728.1|; |53829689|gb|AAU94726.1|; |53829686|gb|AAU94724.1|; |53829683|gb|AAU94722.1|; |8486160|ref|NP_056664.1|; |30466242|ref|NP_848689.1|; |30349250|gb|AAP22121.1|; |30466211|ref|NP_848672.1|; |30349219|gb|AAP22104.1|; |4761025|gb|AAD29208.1|AF100392_1|; |4761022|gb|AAD29206.1|AF100391_1|; |4761019|gb|AAD29204.1|AF100390_1|; |4761016|gb|AAD29202.1|AF100389_1|; |4761013|gb|AAD29200.1|AF100388_1|; |4761010|gb|AAD29198.1|AF100387_1|; |4761007|gb|AAD29196.1|AF100386_1|; |4761004|gb|AAD29194.1|AF100385_1|; |4761001|gb|AAD29192.1|AF100384_1|; |4760998|gb|AAD29190.1|AF100383_1|; |4760995|gb|AAD29188.1|AF100382_1|; |4760992|gb|AAD29186.1|AF100381_1|; |4760989|gb|AAD29184.1|AF100380_1|; |4760986|gb|AAD29182.1|AF100379_1|; |4760983|gb|AAD29180.1|AF100378_1|; |4760980|gb|AAD29178.1|AF100377_1|; |4760977|gb|AAD29176.1|AF100376_1|; |4760974|gb|AAD29174.1|AF100375_1|; |4760971|gb|AAD29172.1|AF100374_1|; |12862823|dbj|BAB32623.1|; |12862820|dbj|BAB32621.1|; |12862817|dbj|BAB32619.1|; |5702096|gb|AAD47140.1|; |51340785|gb|AAU01001.1|; |50059438|gb|AAT69451.1|; |50059400|gb|AAT69429.1|; |50059419|gb|AAT69440.1|; |325196|gb|AAA67100.1|; |325202|gb|AAA43726.1|; |138823sp|P03489|VMT1_INBLE|; |138824|sp|P06816|VMT1_INBSI|; |138822|sp|P13880|VMT1_INBAD|; |138821|sp|P13879|VMT1_INBAC|; |325198|gb|AAA66416.1|; |325194|gb|AAA66414.1|; |9049382|dbj|BAA99399.1|; |5764368|gb|AAD51265.1|AF153257_1|; |76443315|gb|ABA42441.1|; |76443312|gb|ABA42439.1|; |76443309|gb|ABA42437.1|; |76443306|eb|ABA42435.1|; |76443303|gb|ABA42433.1|; |21636455|gb|AAM70003.1|AF457712_1|; |21636450|gb|AAM70000.1|AF457710_1|; |21636434|gb|AAM69991.1|AF457703_1|; |21636416|gb|AAM69981.1|AF457695_1|; |21636398|gb|AAM69971.1|AF457687_1|; |21636378|gb|AAM69960.1|AF457678_1|; |9802291|gb|AAF99672.1|AF258523_1|; |9802288|gb|AAF99670.1|AF258522_1|; |5764374|gb|AAD51269.1|AF153259_1|; |5805289|gb|AAD51928.1|AF144306_1|; |5764371|gb|AAD51267.1|AF1532581; |71655384|gb|AAZ38740.1|; |71655379|gb|AAZ38738.1|; |71655371|gb|AAZ38736.1|; |71655356|gb|AAZ38734.1|; |71655345|gb|AAZ38732.1|; |71655341|gb|AAZ38730.1|; |71655320|gb|AAZ38728.1|; |73852957|ref|YP_308671.1|; |73912688|ref|YP_308854.1|; |28849409|gb|AAO52887.1|AF509044_1|; |5732422|gb|AAD49093.1|AF156470_2|; |5732419|gb|AAD49091.1|AF156469_2|; |5732416|gb|AAD49089.1|AF156468_2|; |28194354|gb|AAO33517.1|AF474058_1|; |28194351|gb|AAO33515.1|AF474057_1|; |28194348|gb|AAO33513.1|AF474056_1|; |28194345|gb|AAO33511.1|AF474055_1|; |28194342|gb|AAO33509.1|AF474054_1|; |28194339|gb|AAO33507.1|AF474053_1|; |28194336|gb|AAO33505.1|AF474052_1|; |28194333|gb|AAO33503.1|AF474051_1|; |28194330|gb|AAO33501.1AF474050_1|; |28194327|gb|AAO33499.1|AF474049_1|; |28849451|gb|AAO52908.1|AF509065_1|; |28849449|gb|AAO52907.1|AF509064_1|; |28849447|gb|AAO52906.1|AF509063_1|; |28849445|gb|AAO52905.1|AF509062_1|; |28849443|gb|AAO52904.1|AF509061_1|; |28849441|gb|AAO52903.1|AF509060_1|; |28849439|gb|AAO52902.1|AF509059_1|; |28849437|gb|AAO52901.1|AF509058_1|; |28849435|gb|AAO52900.1|AF509057_1|; |28849433|gb|AAO52899.1|AF509056_1|; |28849431|gb|AAO52898.1|AF509055_1|; |28849429|gb|AAO52897.1|AF509054_1|; |28849427|gb|AAO52896.1|AF509053_1|; |28849425|gb|AAO52895.1|AF509052_1|; |28849423|gb|AAO52894.1|AF509051_1|; |28849421|gb|AAO52893.1|AF509050_1|; |28849419|gb|AAO52892.1|AF509049_1|; |28849417|gb|AAO52891.1|AF509048_1|; |28849415|gb|AAO52890.1|AF509047_1|; |28849413|gb|AAO52889.1|AF509046_1|; |28849411|gb|AAO52888.1|AF509045_1|; |28849407|gb|AAO52886.1|AF509043_1|; |28849405|gb|AAO52885.1|AF509042_1|; |28849403|gb|AAO52884.1|AF509041_1|; |28849401|gb|AAO52883.1|AF509040_1|; |5732407|gb|AAD49083.1|AF156465_2|; |5732425|gb|AAD49095.1|AF156471_2|; |5732413|gb|AAD49087.1|AF156467_2|; |5732410|gb|AAD49085.1|AF156466_2|; |5732404|gb|AAD49081.1|AF156464_2|; |5732401|gb|AAD49079.1|AF156463_2|; |5732398|gb|AAD49077.1|AF156462_2|; |5732395|gb|AAD49075.1|AF156461_2|; |5732392|gb|AAD49073.1|AF156460_2|; |5732389|gb|AAD49071.1|AF156459_2|; |5732386|gb|AAD49069.1|AF156458_2|; |324263|gb|AAA43254.1|; |37933077|gb|AAO46713.1|; |37933074|gb|AAO46711.1|; |37933071|gb|AAO46709.1|; |37933068|gb|AAO46707.1|; |37933065|gb|AAO46705.1|; |37933062|gb|AAO46703.1|; |37933059|gb|AAO46701.1|; |37933056|gb|AAO46699.1|; |37933053|gb|AAO46697.1|; |37933050|gb|AAO46695.1|; |37933047|gb|AAO46693.1|; |37933044|gb|AAO46691.1|; |37933041|gb|AAO46689.1|; |37933038|gb|AAO46687.1|; |37933035|gb|AAO46685.1|; |37933032|gb|AAO46683.1|; |37933029|gb|AAO46681.1|; |37933026|gb|AAO46679.1|; |37933023|gb|AAO46677.1|; |37933020|gb|AAO46675.1|; |37933017|gb|AAO46673.1|; |37933014|gb|AAO46671.1|; |37933011|gb|AAO46669.1|; |37933008|gb|AAO46667.1|; |37933005|gb|AAO46665.1|; |37933002|gb|AAO46663.1|; |37932999|gb|AAO46661.1|; |37932996|gb|AAO46659.1|; |37932993|gb|AAO46657.1|; |37932990|gb|AAO46655.1|; |37932987|gb|AAO46653.1|; |37932984|gb|AAO46651.1|; |37785163|gb|AAO46420.1|; |37785160|gb|AAO46418.1|; |37785157|gb|AAO46416.1|; |37785154|gb|AAO46414.1|; |37785151|gb|AAO46412.1|; |37785145|gb|AAO46408.1|; |37785142|gb|AAO46406.1|; |37785139|gb|AAO46404.1|; |37785136|gb|AAO46402.1|; |37785133|gb|AAO46400.1|; |37785130|gb|AAO46398.1|; |37785127|gb|AAO46396.1|; |37785124|gb|AAO46394.1|; |37785121|gb|AAO46392.1|; |37785118|gb|AAO46390.1|; |37785115|gb|AAO46388.1|; |37785112|gb|AAO46386.1|; |37785109|gb|AAO46384.1|; |37785106|gb|AAO46382.1|; |37785103|gb|AAO46380.1|; |37785100|gb|AAO46378.1|; |37785097|gb|AAO46376.1|; |37785094|gb|AAO46374.1|; |37785091|gb|AAO46372.1|; |37785088|gb|AAO46370.1|; |37785085|gb|AAO46368.1|; |37785082|gb|AAO46366.1|; |37785079|gb|AAO46364.1|; |37785076|gb|AAO46362.1|; |37785073|gb|AAO46360.1|; |37785070|gb|AAO46358.1|; |37785067|gb|AAO46356.1|; |37785064|gb|AAO46354.1|; |37785061|gb|AAO46352.1|; |37785058|gb|AAO46350.1|; |37785055|gb|AAO46348.1|; |37785053|gb|AAO46347.1|; |37785049|gb|AAO46344.1|; |37785046|gb|AAO46342.1|; |3925107|gb|AAK49251.1|AF255374_1|; |324383|gb|AAA43336.1|; |324322|gb|AAA43294.1|; |325068|gb|AAA43674.1|; |324395|gb|AAA43344.1|; |324371|gb|AAA43316.1|; |324334|gb|AAA43302.1|; |324316|gb|AAA43290.1|; |324310|gb|AAA43286.1|; |324299|gb|AAA43277.1|; |11065886|gb|AAG28376.1|AF188004_1|; |1065883|gb|AAG28374.1|AF188003_1|; |483855|gb|AAC79577.1|; |2833661|gb|AAC34265.1|; |73665375|gb|AAZ79394.1|; |30025987|gb|AAP04510.1|; |66734259|gb|AAY53536.1|; |37785148|gb|AA046410.1|; |7429156|pir.parallel.PN0086|; |58618460|gb|AAW80728.1|; |58618458|gb|AAW80727.1|; |13925103|gb|AAK49249.1|AF2553731; |50365716|gb|AAT76159.1|; |18140844|gb|AAL60445.1|AF398876_1|; |20065772|gb|AAM09298.1|; |20065769|gb|AAM09296.1|; |324406|gb|AAA43351.1|; |324398|gb|AAA43347.1|; |324392|gb|AAA43342.1|; |324389|gb|AAA43340.1|; |324386|gb|AAA43338.1|; |324380|gb|AAA43334.1|; |324377|gb|AAA43332.1|; |324374|gb|AAA43318.1|; |324344|gb|AAA43307.1|; |324331|gb|AAA43300.1|; |324328|gb|AAA43298.1|; |324319|gb|AAA43292.1|; |324313|gb|AAA43288.1|; |324307|gb|AAA43282.1|; |324304|gb|AAA43280.1|; |27596998|ref|NP_775536.1|; |61612084|gb|AAX47287.1|; |63054907|gb|AAY28990.1|; |60473|emb|CAA30892.1|; |60470|emb|CAA30890.1|; |60467|emb|CAA30888.1|; |60464|emb|CAA30886.1|; |60461|emb|CAA30884.1|; |60458|emb|CAA30882.1|; |45124752|emb|CAF33014.1|; |94145|pir.parallel.JN0392|; |75117|pir.parallel.MFIV1K|; |7444522|pir.parallel.T09279|; |77195|pir.parallel.S04050|; |77193|pir.parallel.S04052|; |77191|pir.parallel.S04058|; |77189|pir.parallel.S04056|; |56548894|gb|AAV97612.1|; |56548892|gb|AAV97611.1|; |56548890|gb|AAV97610.1|; |56548888|gb|AAV97609.1|; |58618456|gb|AAW80726.1|; |51094108|gb|AAS89185.2|; |51859837|gb|AAU11202.1|; |51859834|gb|AAU11200.1|; |51859831|gb|AAU11198.1|; |51859825|gb|AAU11194.1|; |51859822|gb|AAU11192.1|; |51859819|gb|AAU11190.1|; |51859816|gb|AAU11188.1|; |51859813|gb|AAU11186.1|; |51859810|gb|AAU11184.1|; |51859807|gb|AAU11182.1|; |51859804|gb|AAU11180.1|; |51859801|gb|AAU11178.1|; |51859798|gb|AAU11176.1|; |51859792|gb|AAU11172.1|; |51859789|gb|AAU11170.1|; |51859786|gb|AAU11168.1|; |51859783|gb|AAU11166.1|; |33318239|gb|AAQ04993.1|AF508704_1|; |33318237|gb|AAQ04992.1|AF508703_1|; |33318235|gb|AAQ04991.1|AF508702_1|; |33318233|gb|AAQ04990.1|AF508701_1|; |33318231|gb|AAQ04989.1|AF508700_1|; |33318229|gb|AAQ04988.1|AF508699_1|; |33318227|gb|AAQ04987.1|AF508698_1|; |33318225|gb|AAQ04986.1|AF508697_1|; |33318223|gb|AAQ04985.1|AF508696_1|; |33318221|gb|AAQ04984.1|AF508695_1|; |33318219|gb|AAQ04983.1|AF508694_1|; |33318217|gb|AAQ04982.1|AF508693_1|; |33318215|gb|AAQ04981.1|AF508692_1|; |33318213|gb|AAQ04980.1|AF508691_1|; |33318207|gb|AAQ04977.1|AF508688_1|; |33318205|gb|AAQ04976.1|AF508687_1|; |33318199|gb|AAQ04973.1|AF508684_1|; |41207456|gb|AAR99627.1|; |29539573|gb|AAO88261.1|AF342818_1|; |14587042|gb|AAK70447.|AF386772_1|; |14587039|gb|AAK70445.1|AF386771_1|; |14587036|gb|AAK70443.|AF386770_1|; |14587033|gb|AAK70441.1|AF386769_1|; |14587030|gb|AAK70439.|AF386768_1|; |14587027|gb|AAK70437.1|AF386767_1|; |14587024|gb|AAK70435.|AF386766_1|; |14587021|gb|AAK70433.1|AF386765_1|; |27462132|gb|AA015336.1|AF225529_1|; |27462129|gb|AAO15334.1|AF225528_1|; |27462126|gb|AA015332.1|AF225527_1|; |27462123|gb|AAO15330.1|AF225526_1|; |21693175|gb|AAM75161.1|AF389121_1|; |14009743|gb|AAK51748.1|; |14009740|gb|AAK51746.1|; |14009737|gb|AAK51744.1|; |14009734|gb|AAK51742.1|; |14009731|gb|AAK51740.1|; |14009728|gb|AAK51738.1|; |14009725|gb|AAK51736.1|; |14009722|gb|AAK51734.1|; |14009719|gb|AAK51732.1|; |14009716|gb|AAK51730.1|; |4097640|gb|AAD00149.1|; |4097637|gb|AAD00147.1|; |4097634|gb|AAD00145.1|; |4097631|gb|AAD00143.1|; |4097628|gb|AAD00141.1|; |4097625|gb|AAD00139.1|; |4097622|gb|AAD00137.1|; |4097619|gb|AAD00135.1|; |4097616|gb|AAD00133.1|; |4097613|gb|AAD00131.1|; |4097610|gb|AAD00129.1|; |3929612|gb|AAC80167.1|; |3929609|gb|AAC80165.1|; |3929606|gb|AAC80163.1|; |3929603|gb|AAC80161.1|; |3929600|gb|AAC80159.1|; |3929597|gb|AAC80157.1|; |3929594|gb|AAC80155.1|; |3722202|gb|AAC63485.1|; |3722199|gb|AAC63483.1|; |3722196|gb|AAC63481.1|; |3722193|gb|AAC63479.1|; |3414662|gb|AAC31296.1|; |3414659|gb|AAC31294.1|; |3414653|gb|AAC31290.1|; |3414650|gb|AAC31288.1|; |3414647|gb|AAC31286.1|; |3414635|gb|AAC31278.1|; |3414629|gb|AAC31274.1|; |3414626|gb|AAC31272.1|; |60818|emb|CAA41928.1|; |75118|pir.parallel.MFIV1F|; |235419|gb|AAB19773.1|; |138819|sp|P05777|VMT1_IAWIL|; |138817|sp|P03485|VMT1_IAPUE; |324260|gb|AAA43252.1|; |324258|gb|AAA431251.1|; |138812|sp|P05775|VMT1_IAFPW; |1912412|gb|AAB50992.1|; |1912409|gb|AAB50990.1|; |1912406|gb|AAB50988.1 |1912403|gb|AAB50986.1|; |1912400|gb|AAB50984.1|; |407933|gb|AAB39915.1|; |406039|gb|AAA67337.1|; |325082|gb|AAA43682.1|; |324364|gb|AAA43313.1|; |324266|gb|AAA43256.1|; |323978|gb|AAA43092.1|; |62901345|sp|Q77Y95|VMT1_IAHO3|; |60416244|sp|P69276|VMT1_IASIN|; |60416243|sp|P69275|VMT1_IAFOW|; |54039855|sp|P63234|VMT1_IAPOC|; |549378|sp|P35937|VMT1_IAUSS|; 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|325087|gb|AAA73109.1|; |324890|gb|AAA73104.1|; |324584|gb|AAA73108.1|; |324582|gb|AAA73107.1|; |324256|gb|AAA73106.1|; |61197036|gb|AAX39501.1|; |61197032|gb|AAX39499.1|; |175093|pir.parallel.VHIV8H|; |50083235|gb|AAT70212.1|; |37813190|gb|AAR04371.1|; |37813188|gb|AAR04370.1|; |37813192|gb|AAR04372.1|; |60478|emb|CAA33899.1|; |324031|gb|AAB59744.1|; |16589037|gb|AAL26994.1|AF397199_1|; |16589034|gb|AAL26993.1|AF397198_1|; |279784|pir.parallel.VHIVAK|; |279783|pir.parallel.VHIVXL|; |34597775|gb|AAQ77445.1|; |34597773|gb|AAQ77444.1|; |29539576|gb|AAO88263.1AF342819_1|; |61197034|gb|AAX39500.1|; |9049384|dbj|BAA99400.1|; |71084275|gb|AAZ23583.1|; |71084269|gb|AAZ23580.1|; |71084267|gb|AAZ23579.1|; |55925904|gb|AAV68025.1|; |58374190|gb|AAW72231.1|; |58618448|gb|AAW80722.1|; |58618446|gb|AAW80721.1|; |27596994|ref|NP_775533.1|; |58618444|gb|AAW80720.1|; |21693171|gb|AAM75159.1|AF389119_1|; |75108|pir.parallel.VHIVN8|; |75107|pir.parallel.VHIVX1|; |75104|pir.parallel.VHIVN1|; |75103|pir.parallel.VHIVN2|; |75102|pir.parallel.VHVIN3|; |75101|pir.parallel.VHIVN6|; |75100|pir.parallel.VHIVN9|; |75094|pir.parallel.VHIVN7|; |320344|pir.parallel.A60028|; |320033|pir.parallel.VHIVM1|; |320032|pir.parallel.VHIVC1|; |75099|pir.parallel.VHIVX6|; |75095|pir.parallel.VHIVX2|; |66733741|gb|AAY52631.1|; |66733739|gp|AAT52630.1|; |66733737|gb|AAY52626.1|; |66733735|gb|AAY52628.1|; |66733733|gb|AAY52627.1|; |66733731|gb|AAY52626.1|; |66733729|gb|AAY52625.1|; |66733727|gb|AAY52624.1|; |66733725|gb|AAY52623.1|; |66733723|gb|AAY52622.1|; |66733721|gb|AAY52621.1|; |66733719|gb|AAY52620.1|; |66733717|gb|AAY52619.1|; |66733715|gb|AAY52618.1|; |66733713|gb|AAY52617.1|; |66733711|gb|AAY52616.1|; |66733709|gb|AAY52615.1|; |66733707|gb|AAY52614.1|; |66733705|gb|AAY52613.1|; |66733703|gb|AAY52612.1|; |66733701|gb|AAY52611.1|; |66733699|gb|AAY52610.1|; |66733697|gb|AAY52609.1|; |66733695|gb|AAY52608.1|; |66733693|gb|AAY52607.1|; |66733691|gb|AAY52606.1|; |66733689|gb|AAY52605.1|; |66733687|gb|AAY52604.1|; |73921307|ref|YP_308871.1|; |37785430|gb|AAO46552.1|; |37785428|gb|AAO46551.1|; |37785426|gb|AAO46550.1|; |37785424|gb|AAO46549.1|; |37785422|gb|AAO46548.1|; |37785420|gb|AAO46547.1|; |37785418|gb|AAO46546.1|; |37785416|gb|AAO46545.1|; |37785414|gb|AAO46544.1|; |37785412|gb|AAO46543.1|; |37785410|gb|AAO46542.1|; |37785408|gb|AAO46541.1|; |37785406|gb|AAO46540.1|; |37785404|gb|AAO46539.1|; |37785402|gb|AAO46538.1|; |37785400|gb|AAO46537.1|; |37785398|gb|AAO46536.1|; |37785396|gb|AAO46535.1|; |37785394|gb|AAO46534.1|; |37785392|gb|AAO46533.1|; |37785390|gb|AAO46532.1|; |37785388|gb|AAO46531.1|; |37785386|gb|AAO46530.1|; |37785384|gb|AAO46529.1|; |37785382|gb|AAO46528.1|; |37785380|gb|AAO46527.1|; |37785378|gb|AAO46526.1|; |37785376|gb|AAO46525.1|; |37785374|gb|AAO46524.1|; |37785372|gb|AAO46523.1|; |37785370|gb|AAO46522.1|; |37785368|gb|AAO46521.1|; |37785244|gb|AAO46460.1|; |37785242|gb|AAO46459.1|; |37785240|gb|AAO46458.1|; |37785238|gb|AAO46457.1|; |37785236|gb|AAO46456.1|; |37785234|gb|AAO46455.1|; |37785232|gb|AAO46454.1|; |37785230|gb|AAO46453.1|; |37785228|gb|AAO46452.1|; |37785226|gb|AAO46451.1|; |37785224|gb|AAO46450.1|; |37785222|gb|AAO46449.1|; |37785220|gb|AAO46448.1|; |37785218|gb|AAO46447.1|; |37785216|gb|AAO46446.1|; |37785214|gb|AAO46445.1|; |37785212|gb|AAO46444.1|; |37785210|gb|AAO46443.1|; |37785208|gb|AAO46442.1|; |37785206|gb|AAO46441.1|; |37785204|gb|AAO46440.1|; |37785202|gb|AAO46439.1|; |37785200|gb|AAO46438.1|; |37785198|gb|AAO46437.1|; |37785196|gb|AAO46436.1|; |37785194|gb|AAO46435.1|; |37785192|gb|AAO46434.1|; |37785190|gb|AAO46433.1|; |37785188|gb|AAO46432.1|; |37785186|gb|AAO46431.1|; |37785184|gb|AAO46430.1|; |37785182|gb|AAO46429.1|; |37785180|gb|AAO46428.1|; |37785178|gb|AAO46427.1|; |37785176|gb|AAO46426.1|; |37785174|gb|AAO46425.1|; |37785172|gb|AAO46424.1|; |37785170|gb|AAO46423.1|; |37785168|gb|AAO46422.1|; |13925172|gb|AAK49279.1|AF255753_1|; |13274625|gb|AAK18006.1|AF255749_1|; |13274623|gb|AAK18005.1|AF255748_1|; |31339496|gb|AAP49080.1|; |31339492|gb|AAP49078.1|; |66775627|gb|AAY56368.1|; |42661500|emb|CAF31360.1|; |54126502|gb|AAV30830.1|; |50234808|gb|AAT70633.1|; |18092172|gb|AAL59145.1|AF398420_1|; |18092170|gb|AAL59144.1|AF398419_1|; |8307799|gb|AAF74328.1|AF084278_1|; |8307797|gb|AAF74327.1|AF084277_1|; |8307795|gb|AAF74326.1|AF084276_1|; |2833664|gb|AAC34267.1|; |54126537|gb|AAV30838.1|; |73852953|ref|YP_308667.1|; |32140159|ref|NP_859032.1|; |30025978|gb|AAP04508.1|; |71013502|dbj|BAE07202.1|; |62466165|gb|AAX83408.1|; |62466157|gb|AAX83404.1|; |54610028|gb|AAV35112.1|; |54299852|gb|AAV32650.1|; |54299838|gb|AAV32642.1|; |52078184|gb|AAU25867.1|; |52078171|gb|AAU25860.1|; |52078148|gb|AAU25847.1|; |47834203|gb|AAT38823.1|; |49357240|gb|AAT65380.1|; |49357234|gb|AAT65377.1|; |49357232|gb|AAT65376.1|; |49357224|gb|AAT65372.1|; |49357216|gb|AAT65368.1|; |49357212|gb|AAT65366.1|; |49357208|gb|AAT65364.1|; |49357196|gb|AAT65358.1|; |49357186|gb|AAT65353.1|; |49357184|gb|AAT65352.1|; |13925169|gb|AAK49278.1|AF255752_1|; |13925167|gb|AAK49277.1|AF255751_1|; |13925164|gb|AAK49276.1|AF255750_1|; |13925161|gb|AAK49275.1|AF255747_1|; |13925159|gb|AAK49274.1|AF255746_1|; |13925156|gb|AAK49273.1|AF255745_1|; |13925153|gb|AAK49272.1|AF2557441; |13925151|gb|AAK49271.1|AF255743_1|; |13925148|gb|AAK49270.1|AF255742_1|; |38154862|gb|AAR12367.1|; |38154860|gb|AAR12366.1|; |38154858|gb|AAR12365.1|; |38154856|gb|AAR12364.1|; |38154854|gb|AAR12363.1|; |38154852|gb|AAR12362.1|; |38154850|gb|AAR12361.1|; |38154848|gb|AAR12360.1|; |38154846|gb|AAR12359.1|; |38154844|gb|AAR12358.1|; |38154842|gb|AAR12357.1|; |38154840|gb|AAR12356.1|; |38154838|gb|AAR12355.1|; |38154836|gb|AAR12354.1|; |38154834|gb|AAR12353.1|; |38154832|gb|AAR12352.1|; |38154830|gb|AAR12351.1|; |38154828|gb|AAR12350.1|; |47156435|gb|AAT12105.1|; |47156433|gb|AAT12104.1|; |47156431|gb|AAT12103.1|; |47156429|gb|AAT12102.1|; |47156427|gb|AAT12101.1|; |47156425|gb|AAT12100.1|; |47156423|gb|AAT12099.1|; |47156421|gb|AAT12098.1|; |47156419|gb|AAT12097.1|; |47156417|gb|AAT12096.1|; |47156415|gb|AAT12095.1|; |47156413|gb|AAT12094.1|; |47156411|gb|AAT12093.1|; |47156409|gb|AAT12092.1|; |47156407|gb|AAT12091.1|; |47156405|gb|AAT12090.1|; |47156403|gb|AAT12089.1|; |47156401|gb|AAT12088.1|; |47156399|gb|AAT12087.1|; |47156397|gb|AAT12086.1|; |47156395|gb|AAT12085.1|; |30522970|gb|AAO65613.1|; |28849563|gb|AAO52964.1|AF509121_1|; |19422133|gb|AAL87893.1|AF455703_1|; |19422127|gb|AAL87890.1|AF455700_1|; |19422125|gb|AAL87889.1|AF455699_1|; |290762|gb|AAA51501.1|; |9802278|gb|AAF99666.1|AF258516_1|; |5732297|gb|AAD49024.1|AF156414_1|; |5732293|gb|AAD49022.1|AF156412_1|; |5732291|gb|AAD49021.1|AF156411_1|; |6048944|gb|AAF02408.1|AF098628_1|; |6048940|gb|AAF02406.1|AF098626_1|; |5805283|gb|AAD51925.1|AF144303_1|; |76800632|gb|ABA55723.1|; |59803332|gb|AAX07774.1|; |157916081|gb|AAW59409.1|; |57916035|gb|AAW59399.1|; |57915988|gb|AAW59391.1|; |47716775|gb|AAT37564.1|; |42661498|emb|CAF31359.1|; |60823|emb|CAA36505.1|; |60821|emb|CAA36234.1|; |58531177|dbj|BAD89346.1|; |58531159|dbj|BAD89336.1|; |58531141|dbj|BAD89326.1|; |58531123|dbj|BAD89316.1|; |58531091|dbj|BAD89306.1|; |50956630|gb|AAT90833.1|; |50234860|gb|AAT70659.1|; |50234830|gb|AAT70644.1|; |50234828|gb|AAT70643.1|; |50234826|gb|AAT70642.1|; |50234824|gb|AAT70641.1|; |50234822|gb|AAT70640.1|; |50234820|gb|AAT70639.1|; |50234818|gb|AAT70638.1|; |50234816|gb|AAT70637.1|; |50234814|gb|AAT70636.1|; |50234812|gb|AAT70635.1|; |50234810|gb|AAT70634.1|; |50234806|gb|AAT70632.1|; |50234804|gb|AAT70631.1|; |50234802|gb|AAT70630.1|; |50234800|gb|AAT70629.1|; |50234798|gb|AAT70628.1|; |50234796|gb|AAT70627.1|; |50234794|gb|AAT70626.1|; |50234792|gb|AAT70625.1|; |50234790|gb|AAT70624.1|; |50234778|gb|AAT70618.1|; |50234776|gb|AAT70617.1|; |50234774|gb|AAT70616.1|; |42521292|gb|AAS18236.1|; |38524558|dbj|BAD02358.1|; |38524540|dbj|BAD02348.1|; |6177890|dbj|BAA86069.1|; |6177888|dbj|BAA86068.1|; |6177886|dbj|BAA86067.1|; |6177884|dbj|BAA86066.1|; |28194391|gb|AAO33540.1|AF474070_1|; |28194387|gb|AAO33539.1|AF474069_1|; |24286070|gb|AAN46830.1|; |14579581|gb|AAK69308.1|AF385293_1|; |18140826|gb|AAL60436.1|AF398867_1|; |18074925|emb|CAC84253.1|; |18074923|emb|CAC84252.1|; |18074921|emb|CAC84251.1|; |18074919|emb|CAC84250.1|; |18074917|emb|CAC84249.1|; |18074915|emb|CAC84248.1|; |18074913|emb|CAC84247.1|; |18074911|emb|CAC84246.1|; |18074909|emb|CAC84245.1|; |8452830|gb|AAF75110.1|AF115285_1|; |8452828|gb|AAF75109.1|AF115284_1|; |77917343|gb|ABB05220.1|; |77917324|gb|ABB05209.1|; |77917305|gb|ABB05198.1|; |77869495|gb|ABB05187.1|; |77863498|gb|ABB05009.1|; |77863479|gb|ABB04998.1|; |77863460|gb|ABB04987.1|; |77863441|gb|ABB04976.1|; |77863422|gb|ABB04965.1|; |77863403|gb|ABB04954.1|; |77863384|gb|ABB04943.1|; |77863365|gb|ABB04932.1|; |77863346|gb|ABB04921.1|; |77863327|gb|ABB04910.1|; |77861874|gb|ABB04375.1|; |77861855|gb|ABB04364.1|; |77861836|gb|ABB04353.1|; |77861817|gb|ABB04342.1|; |77861798|gb|ABB04331.1|; |77861779|gb|ABB04320.1|; |77861760|gb|ABB04309.1|; |77861741|gb|ABB04298.1|; |77861722|gb|ABB04287.1|; |77747467|gb|ABB03149.1|; |77747448|gb|ABB03138.1|; |77747429|gb|ABB03127.1|; |77747409|gb|ABB03116.1|; |77747390|gb|ABB03105.1|; |77747371|gb|ABB03094.1|; |77747352|gb|ABB03083.1|; |77747333|gb|ABB03072.1|; |77747312|gb|ABB03061.1|; |77747293|gb|ABB03050.1|; |77747274|gb|ABB03039.1|; |77747255|gb|ABB03028.1|; |77747236|gb|ABB03017.1|; |77747217|gb|ABB03006.1|; |77747198|gb|ABB02995.1|; |77747179|gb|ABB02984.1|; |77747158|gb|ABB02973.1|; |77747139|gb|ABB02962.1|; |77747120|gb|ABB02951.1|; |77747101|gb|ABB02940.1|; |77747080|gb|ABB02928.1|; |77747061|gb|ABB02917.1|; |77747042|gb|ABB02906.1|; |77746996|gb|ABB02895.1|; |77746977|gb|ABB02884.1|; |77746958|gb|ABB02873.1|; |77746939|gb|ABB02862.1|; |77746920|gb|ABB02851.1|; |77746899|gb|ABB02840.1|; |77746880|gb|ABB02829.1|; |77746861|gb|ABB02818.1|; |77746842|gb|ABB02807.1|; |77746823|gb|ABB02796.1|; |77746804|gb|ABB02785.1|; |77543690|gb|ABA87257.1|; |77543670|gb|ABA87246.1|; |77543650|gb|ABA87235.1|; |77543368|gb|ABA87095.1|; |77543349|gb|ABA87084.1|; |77543305|gb|ABA87061.1|; |77543249|gb|ABA87049.1|; |76464403|gb|ABA43340.1|; |76454181|gb|ABA43204.1|; 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|47156529|gb|AAT12152.1|; |47156527|gb|AAT12151.1|; |47156525|gb|AAT12150.1|; |47156523|gb|AAT12149.1|; |47156521|gb|AAT12148.1|; |11430831|emb|CAA67498.1|; |19422189|gb|AAL87925.1|AF455727_1|; |19422183|gb|AAL87922.1|AF455724_1|; |19422181|gb|AAL87921.1|AF455723_1|; |14532423|gb|AAK64188.1|; |13661046|emb|CAC37002.1|; |5805279|gb|AAD51923.1|; |57916067|gb|AAW59406.1|; |57916013|gb|AAW59396.1|; |57915966|gb|AAW59388.1|; |47716769|gb|AAT37561.1|; |58531173|dbj|BAD89344.1|; |58531152|dbj|BAD89333.1|; |58531135|dbj|BAD89323.1|; |58531117|dbj|BAD89313.1|; |58531085|dbj|BAD89303.1|; |50956624|gb|AAT90830.1|; |50296498|gb|AAT73525.1|; |50296468|gb|AAT73510.1|; |50296462|gb|AAT73507.1|; |50296458|gb|AAT73505.1|; |50296456|gb|AAT73504.1|; |50296454|gb|AAT73503.1|; |50296452|gb|AAT73502.1|; |50296450|gb|AAT73501.1|; |50296448|gb|AAT73500.1|; |50296444|gb|AAT73498.1|; |50296440|gb|AAT73496.1|; |50296438|gb|AAT73495.1|; |50296436|gb|AAT73494.1|; |50296432|gb|AAT73492.1|; |50296430|gb|AAT73491.1|; |50296428|gb|AAT73490.1|; |50296416|gb|AAT73484.1|; |50296414|gb|AAT73483.1|; |50296412|gb|AAT73482.1|; |37963694|gb|AAR05984.1|; |37963692|gb|AAR05983.1|; |37963696|gb|AAR05985.1|; |38524562|dbj|BAD02360.1|; |38524542|dbj|BAD02349.1|; |24286097|gb|AAN46833.1|; |61612044|gb|AAX47280.1|; |61612038|gb|AAX47279.1|; |71000178|dbj|BAE07153.1|; |30025725|gb|AAP04506.1|; |70905275|gb|AAZ14161.1|; |70905273|gb|AAZ14160.1|; |70905271|gb|AAZ14159.1|; |70905269|gb|AAZ14158.1|; |70905267|gb|AAZ14157.1|; |70905265|gb|AAZ14156.1|; |70905263|gb|AAZ14155.1|; |70905261|gb|AAZ14154.1|; |70905259|gb|AAZ14153.1|; |70905257|gb|AAZ14152.1|; |70905255|gb|AAZ14151.1|; 70905253|gb|AAZ14150.1|; |3335435|gb|AAC32096.1|; |3335415|gb|AAC32085.1|; |56548870|gb|AAV97600.1|; |56548868|gb|AAV97599.1|; |56548866|gb|AAV97598.1|; |56548864|gb|AAV97597.1|; |56424948|gb|AAV91207.1|; |56424946|gb|AAV91206.1|; |56424942|gb|AAV91204.1|; |50542650|gb|AAT78590.1|; |50365727|gb|AAT76165.1|; |47834828|gb|AAT39049.1|; |47834824|gb|AAT39047.1|; |47834822|gb|AAT39046.1|; |47834814|gb|AAT39042.1|; |47834812|gb|AAT39041.1|; |40732896|emb|CAF04464.1|; |14275693|emb|CAC40038.1|; |13383273|dbj|BAB39508.1|; |13383271|dbj|BAB39507.1|; |13661044|emb|CAC37001.1|; |28823019|gb|AAO46859.1|; |28822828|gb|AAO46858.1|; |28822609|gb|AAO46857.1|; |28822076|gb|AAO46856.1|; |28821871|gb|AAO46855.1|; |28821644|gb|AAO46854.1|; |28821462|gb|AAO46853.1|; |28821280|gb|AAO46852.1|; |28821223|gb|AAO46851.1|; |27462113|gb|AAO15325.1|AF225521_1|; |27462111|gb|AAO15324.1|AF225520_1|; |27462109|gb|AAO15323.1|AF225519_1|; |27462107|gb|AAO15322.1|AF225518_1|; |21359664|gb|AAM49557.1|AF468839_1|; |20068025|emb|CAC84758.1|; |20068023|emb|CAC84686.1|; |20068021|emb|CAC84757.1|; |20068019|emb|CAC84756.1|; |20068017|emb|CAC84755.1|; |20068015|emb|CAC84754.1|; |20068007|emb|CAC84750.1|; |19697848|gb|AAL31425.1|; |19697846|gb|AAL31424.1|; |19697836|gb|AAL31419.1|; |19422195|gb|AAL87928.1|AF455730_1|; |19422193|gb|AAL87927.1|AF455729_1|; |19422191|gb|AAL87926.1|AF455728_1|; |19422187|gb|AAL87924.1|AF455726_1|; |19422185|gb|AAL87923.1|AF455725_1|; |16076717|gb|AAL14089.1|AF222819_1|; |16076715|gb|AAL14088.1|AF222818_1|; |13661048|emb|CAC37003.1|; |8452850|gb|AAF75122.1|AF115293_1|; |8452848|gb|AAF75121.1|AF115292_1|; |323669|gb|AAA42968.1|; |133517|sp|P16508|RRP1_IAMAN|; |133523|sp|P03430|RRP1_IAWI1|; |2506782|sp|P16506|RRP1_IAKOR|; |133527|sp|P16512|RRP1_IAZTF|; |133526|sp|P16510|RRP1_IAZON|; |133525|sp|P16509|RRP1_IAZH3|; |133524|sp|P16514|RRP1_IAWIS|; |133522|sp|P16513|RRP1_IATKM|; |133521|sp|P16511|RRP1_IASIN|; |133518|sp|P16507|RRP1_IAME8|; |133512|sp|P18882|RRP1_IAKIE|; |133511|sp|P16505|RRP1_IAHTE|; |133510|sp|P16504|RRP1_IAHLO|; |133509|sp|P16503|RRP1_IAGU2|; |133506|sp|P16502|RRP1_IABE1|; |6647779|sp|Q82571|RRP1_IAFOM|; |6647775|sp|O91741|RRP1_IAKIT|; |6647773|sp|O89749|RRP1_IACKH|; |133531|sp|P19703|RRP1_INCJJ|; |133520|sp|P03431|RRP1_IAPUE|; |133519|sp|P03432|RRP1_IANT6|; |133505|sp|P21426|RRP1_IAANN|; |401026|sp|P31341RRP1_IAVI7|; |133516|sp|P26121|RRP1_IALE3|; |133515|sp|P26120|RRP1_IALE2|; |133514|sp|P26119|RRP1_IALE1|; |133508|sp|P26118|RRP1_IADUN|; |34733402|gb|AAQ81638.1|; |34733400|gb|AAQ81637.1|; |9863938|gb|AAG01228.1|AF216740_1|; |9863920|gb|AAG01218.1|AF216732_1|; |9863902|gb|AAG01208.1|AF216724_1|; |9863883|gb|AAG01198.1|AF216716_1|; |324980|gb|AAA43647.1|; |324970|gb|AAA43646.1

[0057] The preferred influenza strains referred to in the present invention, for example against which the present polypeptides should be immunogenic, are those containing these specific proteins. The above accession numbers specify explicitly the identity of the strain in addition to the specific protein sequence.

[0058] In some preferred embodiments the polypeptide according to the present invention may comprise one or more sequences as described above and having at least 60% homology with a consensus sequence over known human and avian influenza virus strains (or two or more epitopes of 7 amino acids or more having at least 60% homology with such a sequence). In further preferred embodiments the polypeptide may comprise one or more sequences as described above and having at least 60% homology with a consensus sequence over known human influenza virus strains (or two or more epitopes of 7 amino acids or more having at least 60% homology with such a sequence).

[0059] The percent homology of a first polypeptide sequence to a second polypeptide sequence, as referred to in the context of the present invention, is defined as the number of amino acid residues in the second sequence that match in both position and identity to those in the first sequence, divided by the total number of amino acid residues in the second polypeptide (both first and second polypeptides must have the same number of amino acid residues) and multiplied by 100. In the present invention, it is preferred that the polypeptide homology to the defined sequences is 75% or more, 85% or more, 95% or more or 100% (or substantially 100%).

[0060] The epitopes within the sequences defined above are not especially limited, provided that they contain 7 amino acid residues or more. Preferably the epitopes are of a length that is appropriate for CTL epitopes in a particular vertebrate species, such as in a human, having a specific MHC. Typically the epitopes contain 8, 9, 10, or 11 amino acid residues, but may contain more if desired. Generally an appropriate epitope is one which is a CTL epitope in a vertebrate such as a human.

[0061] Typically, the polypeptide comprises between 7 and 100 amino acids, and preferably from 8-50 amino acids. The size should not be so great that useful epitopes suffer from competition with non-protective epitopes in the immune system (for this reason full proteins are not included), nor should the size be so small that only a very narrow range of protection is offered. More preferred ranges are from 8-40 amino acids, 15-40 amino acids and 15-35 amino acids. The most preferred length is from 20-35 amino acid residues. It is particularly preferred that the polypeptide consists of (or substantially consists of) a sequence selected from the sequences at the positions defined above in the specific list of proteins set out above.

[0062] In addition to the polypeptides described above, which should not be larger than 100 amino acid residues in length, the invention also provides multi-epitope immunogenic polypeptides comprising two or more polypeptides of the present invention. These multi-epitope polypeptides are not limited in size. Thus, they extend not only to the polypeptides having from 7-100 amino acid residues as outlined above, but also to larger polypeptides, provided that these larger polypeptides comprise two or more units, each unit consisting of a polypeptide of the invention. Thus, a polypeptide having 100 repeating units of a 7-mer according to the present invention is encompassed by the present invention, as is a polypeptide having, say 52 units of one 8-mer epitope, and 23 units of a second 10-mer epitope. Polypeptides of this type will not suffer from the competition problems associated with similar length polypeptides that comprise only one or two epitopes. For the avoidance of doubt, the multi-epitope polypeptide may comprise multiple copies of the same epitope, or single copies of a plurality of different epitopes, or multiple copies of 2 or more epitopes.

[0063] Also provided by the invention is a polypeptide composition comprising two or more different polypeptides as defined above. Thus, the polypeptide composition may comprise any number of polypeptides of the present invention together in the same mixture or formulation. The presence of a plurality of polypeptides together is useful since each may elicit its own immune response, widening the protective effect of the composition. It is particularly preferred that the composition contains all of the sequences of SEQ ID 1-6 either each in a separate peptide or several in a smaller number of peptides (e.g. 3 combined in one larger peptide and the other three 3 in another larger peptide, etc.).

[0064] The invention also provides a polypeptide construct, which construct comprises a polypeptide as defined above and a carrier. The construct may be formed by combining two or more epitopes and/or a polypeptide as defined above with the carrier. The carrier may be a molecule, such as an adjuvant and/or an excipient. Combining in this context means either mixing together, or attaching together (e.g. via a covalent linkage).

[0065] The present invention further provides a polypeptide as defined above for use in medicine. Also provided is a medicament or vaccine composition against influenza, comprising a polypeptide as defined above, and one or more appropriate excipients and/or adjuvants, or a polypeptide construct as defined above and optionally one or more appropriate excipients and/or adjuvants (if the carrier part of the construct is itself an excipient or adjuvant, then a further excipient or adjuvant may not be needed). The excipient or adjuvant is not especially limited, and any excipients or adjuvants used in medicaments and vaccines may be employed. The medicament or vaccine composition may be produced according to any known method appropriately adapted to the present invention, such as by mixing a polypeptide of the invention with an appropriate excipient.

[0066] A method of producing a polypeptide as defined above is also provided by the invention. The method is not especially limited, and typically comprises joining two or more epitopes to form the polypeptide. The polypeptide may, however, be synthesised by direct chemical synthesis (e.g. incorporating one amino acid at a time until the full polypeptide is formed) or by recombinant methods. Such general methods are well known to the skilled person and may be adapted to the present invention as desired. In some instances, the polypeptide of the present invention may comprise additional amino acid sequences at one or both termini to help in synthesis of the polypeptide. These additional sequences are preferably from 1-5 amino acids in length. Typically 3 amino acids are involved. For example, in one preferred embodiment, SEQ ID 6 comprises the amino acids AAS immediately prior to the IIG part of the sequence.

[0067] The invention still further provides use of a polypeptide or composition as defined above, in the manufacture of a medicament or vaccine, effective in the treatment or prevention of influenza. Also provided is a method of treating or preventing influenza, which method comprises administering a polypeptide, a composition, a medicament or a vaccine as defined above to a vertebrate. The method of administration is not especially limited, and may comprise subcutaneous, intramuscuscular, intra-venous, intra-dermal, or intra-nasal administration, or may be administered orally (e.g. in the form of a pill or a liquid preparation), or may be in the form of a suppository, if desired. The form of such administration preparations is not especially limited, and known forms may be employed with appropriate modifications that will be apparent to the skilled person. The dosage is not especially limited and may range from 1 μg to 100 g of the polypeptide per individual, depending upon the size, weight and species of the individual involved.

[0068] The invention may be applied to any vertebrate, since the immune systems of vertebrates operate in a related manner. Typically, the vertebrate referred to in the present context is a mammal, bird, a reptile or a fish. It is especially preferred that the vertebrate is a human, a domestic animal (such as a dog or a cat), a farm animal (such as a pig or a horse), a bovine animal (such as cattle, or a cow), or fowl (such as a domestic bird, a farm bird, or a game bird). When the vertebrate is a bird, it is preferably a chicken, a turkey, a duck, or a goose.

[0069] Examples of human MHCs (HLAs) that may be employed with the present invention include the following:

HLA-A

[0070] A*010101, A*010102, A*010103, A*0102, A*0103, A*0104N, A*0106, A*0107, A*0108, A*0109, A*0110, A*02010101, A*02010102L, A*020102, A*020103, A*020104, A*020105, A*020106, A*020107, A*020108, A*020109, A*020110, A*020111, A*0202, A*020301, A*020302, A*0204, A*0205, A*020601, A*020602, A*020603, A*0207, A*0208, A*0209, A*0210, A*0211, A*0212, A*0213, A*0214, A*0215N, A*0216, A*021701, A*021702, A*0218, A*0219, A*022001, A*022002, A*0221, A*0222, A*0224, A*0225, A*0226, A*0227, A*0228, A*0229, A*0230, A*0231, A*0232N, A*0233, A*0234, A*023501, A*023502, A*0236, A*0237, A*0238, A*0239, A*0240, A*0241, A*0242, A*0243N, A*0244, A*0245, A*0246, A*0247, A*0248, A*0249, A*0250, A*0251, A*0252, A*0253N, A*0254, A*0255, A*0256, A*0257, A*0258, A*0259, A*0260, A*0261, A*0262, A*0263, A*0264, A*0265, A*0266, A*0267, A*0268, A*0269, A*0270, A*0271, A*0272, A*0273, A*03010101, A*03010102N, A*03010103, A*030102, A*030103, A*0302, A*0303N, A*0304, A*0305, A*0306, A*0307, A*0308, A*0309, A*0310, A*0311N, A*0312, A*0313, A*0314, A*110101, A*110102, A*1102, A*1103, A*1104, A*1105, A*1106, A*1107, A*1108, A*1109, A*1110, A*1111, A*1112, A*1113, A*1114, A*1115, A*1116, A*1117, A*1118, A*119, A*2301, A*2302, A*2303, A*2304, A*2305, A*2306, A*2307N, A*2308N, A*2309, A*2310, A*2311N, A*2312, A*24020101, A*24020102L, A*240202, A*240203, A*240204, A*240205, A*240206, A*240301, A*240302, A*2404, A*2405, A*2406, A*2407, A*2408, A*2409N, A*2410, A*2411N, A*2413, A*2414, A*2415, A*2417, A*2418, A*2419, A*2420, A*2421, A*2422, A*2423, A*2424, A*2425, A*2426, A*2427, A*2428, A*2429, A*2430, A*2431, A*2432, A*2433, A*2434, A*2435, A*2436N, A*2437, A*2438, A*2439, A*2440N, A*2441, A*2442, A*2443, A*2444, A*2445N, A*2446, A*250101, A*250102, A*2502, A*2503, A*2504, A*2601, A*2602, A*2603, A*2604, A*2605, A*2606, A*260701, A*260702, A*2608, A*2609, A*2610, A*2611N, A*2612, A*2613, A*2614, A*2615, A*2616, A*2617, A*2618, A*2619, A*2620, A*2621, A*2622, A*2623, A*29010101, A*29010102N, A*290201, A*290202, A*290203, A*2903, A*2904, A*2905, A*2906, A*2907, A*2908N, A*2909, A*2910, A*2911, A*300101, A*300102, A*300201, A*300202, A*3003, A*3004, A*3006, A*3007, A*3008, A*3009, A*3010, A*3011, A*3012, A*310102, A*3102, A*3103, A*3104, A*3105, A*3106, A*3107, A*3108, A*3109, A*3110, A*3201, A*3202, A*3203, A*3204, A*3205, A*3206, A*3207, A*3208, A*3301, A*330301, A*330302, A*3304, A*3305, A*3306, A*3307, A*3401, A*3402, A*3403, A*3404, A*3405, A*3406, A*3601, A*3602, A*3603, A*3604, A*4301, A*6601, A*6602, A*6603, A*6604, A*680101, A*680102, A*680103, A*6802, A*680301, A*680302, A*6804, A*6805, A*6806, A*6807, A*6808, A*6809, A*6810, A*6811N, A*6812, A*6813, A*6814, A*6815, A*6816, A*6817, A*6818N, A*6819, A*6820, A*6821, A*6822, A*6823, A*6824, A*6825, A*6826, A*6827, A*6901, A*7401, A*7402, A*7403, A*7404, A*7405, A*7406, A*7407, A*7408, A*7409, A*7410, A*8001.

HLA-B

[0071] B*070201, B*070202, B*070203, B*070204, B*0703, B*0704, B*0705, B*0706, B*0707, B*0708, B*0709, B*0710, B*0711, B*0712, B*0713, B*0714, B*0715, B*0716, B*0717, B*0718, B*0719, B*0720, B*0721, B*0722, B*0723, B*0724, B*0725, B*0726, B*0727, B*0728, B*0729, B*0730, B*0731, B*0732, B*0733, B*0734, B*0735, B*0736, B*0737, B*0738, B*0801, B*0802, B*0803, B*0804, B*0805, B*0806, B*0807, B*0808N, B*0809, B*0810, B*0811, B*0812, B*0813, B*0814, B*0815, B*0816, B*0817, B*0818, B*0819N, B*0820, B*0821, B*0822, B*1301, B*1302, B*1303, B*1304, B*1306, B*1307N, B*1308, B*1309, B*1310, B*1311, B*1312, B*1313, B*1401, B*1402, B*1403, B*1404, B*1405, B*140601, B*140602, B*15010101, B*15010102N, B*150102, B*150103, B*150104, B*150105, B*1502, B*1503, B*1504, B*1505, B*1506, B*1507, B*1508, B*1509, B*1510, B*151101, B*151102, B*1512, B*1513, B*1514, B*1515, B*1516, B*15170101, B*15170102, B*1518, B*1519, B*1520, B*1521, B*1523, B*1524, B*1525, B*1526N, B*1527, B*1528, B*1529, B*1530, B*1531, B*1532, B*1533, B*1534, B*1535, B*1536, B*1537, B*1538, B*1539, B*1540, B*1542, B*1543, B*1544, B*1545, B*1546, B*1547, B*1548, B*1549, B*1550, B*1551, B*1552, B*1553, B*1554, B*1555, B*1556, B*1557, B*1558, B*1560, B*1561, B*1562, B*1563, B*1564, B*1565, B*1566, B*1567, B*1568, B*1569, B*1570, B*1571, B*1572, B*1573, B*1574, B*1575, B*1576, B*1577, B*1578, B*1579N, B*1580, B*1581, B*1582, B*1583, B*1584, B*1585, B*1586, B*1587, B*1588, B*1589, B*1590, B*1591, B*1592, B*1593, B*1594N, B*180101, B*180102, B*1802, B*1803, B*1804, B*1805, B*1806, B*1807, B*1808, B*1809, B*1810, B*1811, B*1812, B*1813, B*1814, B*1815, B*1817N, B*1818, B*1819, B*1820, B*2701, B*2702, B*2703, B*2704, B*270502, B*270503, B*270504, B*270505, B*270506, B*270507, B*2706, B*2707, B*2708, B*2709, B*2710, B*2711, B*2712, B*2713, B*2714, B*2715, B*2716, B*2717, B*2718, B*2719, B*2720, B*2721, B*2723, B*2724, B*2725, B*2726, B*350101, B*350102, B*3502, B*3503, B*3504, B*3505, B*3506, B*3507, B*3508, B*350901, B*350902, B*3510, B*3511, B*3512, B*3513, B*351401, B*351402, B*3515, B*3516, B*3517, B*3518, B*3519, B*3520, B*3521, B*3522, B*3523, B*3524, B*3525, B*3526, B*3527, B*3528, B*3529, B*3530, B*3531, B*3532, B*3533, B*3534, B*3535, B*3536, B*3537, B*3538, B*3539, B*3540N, B*3541, B*3542, B*3543, B*3544, B*3545, B*3546, B*3547, B*3548, B*3549, B*3550, B*3551, B*3552, B*3553N, B*3701, B*3702, B*3703N, B*3704, B*3705, B*3706, B*3707, B*3801, B*380201, B*380202, B*3803, B*3804, B*3805, B*3806, B*3807, B*3808, B*3809, B*3810, B*390101, B*390103, B*390104, B*390201, B*390202, B*3903, B*3904, B*3905, B*390601, B*390602, B*3907, B*3908, B*3909, B*3910, B*3911, B*3912, B*3913, B*3914, B*3915, B*3916, B*3917, B*3918, B*3919, B*3920, B*3922, B*3923, B*3924, B*3925N, B*3926, B*3927, B*3928, B*3929, B*3930, B*3931, B*3932, B*400101, B*400102, B*400103, B*400104, B*400105, B*400201, B*400202, B*4003, B*4004, B*4005, B*40060101, B*40060102, B*4007, B*4008, B*4009, B*4010, B*4011, B*4012, B*4013, B*401401, B*401402, B*401403, B*4015, B*4016, B*4018, B*4019, B*4020, B*4021, B*4022N, B*4023, B*4024, B*4025, B*4026, B*4027, B*4028, B*4029, B*4030, B*4031, B*4032, B*4033, B*4034, B*4035, B*4036, B*4037, B*4038, B*4039, B*4040, B*4042, B*4043, B*4044, B*4045, B*4046, B*4047, B*4048, B*4049, B*4050, B*4051, B*4052, B*4053, B*4054, B*4055, B*4056, B*4057, B*4101, B*4102, B*4103, B*4104, B*4105, B*4106, B*4201, B*4202, B*4204, B*420501, B*420502, B*4206, B*44020101, B*440201025, B*440202, B*440203, B*440301, B*440302, B*4404, B*4405, B*4406, B*4407, B*4408, B*4409, B*4410, B*4411, B*4412, B*4413, B*4414, B*4415, B*4416, B*4417, B*4418, B*4419N, B*4420, B*4421, B*4422, B*4423N, B*4424, B*4425, B*4426, B*4427, B*4428, B*4429, B*4430, B*4431, B*4432, B*4433, B*4434, B*4435, B*4436, B*4437, B*4438, B*4439, B*4440, B*4501, B*4502, B*4503, B*4504, B*4505, B*4506, B*4507, B*4601, B*4602, B*4603, B*4604, B*47010101, B*47010102, B*4702, B*4703, B*4704, B*4705, B*4801, B*4802, B*4803, B*4804, B*4805, B*4806, B*4807, B*4808, B*4809, B*4810, B*4901, B*4902, B*4903, B*5001, B*5002, B*5004, B*510101, B*510102, B*510103, B*510104, B*510105, B*510201, B*510202, B*5103, B*5104, B*5105, B*5106, B*5107, B*5108, B*5109, B*5110, B*5111N, B*5112, B*511301, B*511302, B*5114, B*5115, B*5116, B*5117, B*5118, B*5119, B*5120, B*5121, B*5122, B*5123, B*5124, B*5126, B*5127N, B*5128, B*5129, B*5130, B*5131, B*5132, B*5133, B*5134, B*5135, B*5136, B*520101, B*520102, B*520103, B*520104, B*5202, B*5203, B*5204, B*5205, B*5206, B*530101, B*530102, B*5302, B*5303, B*5304, B*5305, B*5306, B*5307, B*5308, B*5309, B*5401, B*5402, B*5501, B*5502, B*5503, B*5504, B*5505, B*5507, B*5508, B*5509, B*5510, B*5511, B*5512, B*5513, B*5514, B*5515, B*5516, B*5601, B*5602, B*5603, B*5604, B*560501, B*560502, B*5606, B*5607, B*5608, B*5609, B*5610, B*5611, B*5612, B*5613, B*5614, B*570101, B*570102, B*5702, B*570301, B*570302, B*5704, B*5705, B*5706, B*5707, B*5708, B*5709, B*5801, B*5802, B*5804, B*5805, B*5806, B*5807, B*5808, B*5809, B*5810N, B*5901, B*670101, B*670102, B*6702, B*7301, B*7801, B*780201, B*780202, B*7803, B*7804, B*7805, B*8101, B*8102, B*8201, B*8202, B*8301.

HLA-C

[0072] Cw*010201, Cw*010202, Cw*0103, Cw*0104, Cw*0105, Cw*0106, Cw*0107, Cw*0108, Cw*0109, Cw*0110, Cw*020201, Cw*020202, Cw*020203, Cw*020204, Cw*020205, Cw*0203, Cw*0204, Cw*0205, Cw*0206, Cw*0207, Cw*0208, Cw*0209, Cw*030201, Cw*030202, Cw*030301, Cw*030302, Cw*030303, Cw*030304, Cw*030401, Cw*030402, Cw*030403, Cw*0305, Cw*0306, Cw*0307, Cw*0308, Cw*0309, Cw*0310, Cw*0311, Cw*0312, Cw*0313, Cw*0314, Cw*0315, Cw*0316, Cw*0317, Cw*0318, Cw*04010101, Cw*04010102, Cw*040102, Cw*0403, Cw*040401, Cw*040402, Cw*0405, Cw*0406, Cw*0407, Cw*0408, Cw*0409N, Cw*0410, Cw*0411, Cw*0412, Cw*0413, Cw*0414, Cw*0415, Cw*050101, Cw*050102, Cw*0502, Cw*0503, Cw*0504, Cw*0505, Cw*0506, Cw*0507N, Cw*0508, Cw*0509, Cw*0510, Cw*0602, Cw*0603, Cw*0604, Cw*0605, Cw*0606, Cw*0607, Cw*0608, Cw*0609, Cw*0610, Cw*0611, Cw*070101, Cw*070102, Cw*070103, Cw*07020101, Cw*07020102, Cw*07020103, Cw*0703, Cw*070401, Cw*070402, Cw*0705, Cw*0706, Cw*0707, Cw*0708, Cw*0709, Cw*0710, Cw*0711, Cw*0712, Cw*0713, Cw*0714, Cw*0715, Cw*0716, Cw*0717, Cw*0718, Cw*0719, Cw*0720, Cw*0721, Cw*0722, Cw*0723, Cw*0724, Cw*0725, Cw*0726, Cw*0727, Cw*0728, Cw*0729, Cw*080101, Cw*080102, Cw*0802, Cw*0803, Cw*0804, Cw*0805, Cw*0806, Cw*0807, Cw*0808, Cw*0809, Cw*0810, Cw*0811, Cw*0812, Cw*120201, Cw*120202, Cw*120203, Cw*120301, Cw*120302, Cw*120303, Cw*120401, Cw*120402, Cw*1205, Cw*1206, Cw*1207, Cw*1208, Cw*1209, Cw*1210, Cw*1211, Cw*1212, Cw*1213, Cw*1214, Cw*1215, Cw*140201, Cw*140202, Cw*140203, Cw*1403, Cw*1404, Cw*1405, Cw*150201, Cw*150202, Cw*1503, Cw*1504, Cw*150501, Cw*150502, Cw*150503, Cw*150504, Cw*1506, Cw*1507, Cw*1508, Cw*1509, Cw*1510, Cw*1511, Cw*1512, Cw*1601, Cw*1602, Cw*160401, Cw*1606, Cw*1701, Cw*1702, Cw*1703, Cw*1801, Cw*1802.

HLA-E

[0073] E*0101, E*010301, E*010302, E*010303, E*0104.

HLA-F

[0074] F*010101, F*010102.

HLA-G

[0075] G*010101, G*010102, G*010103, G*010104, G*010105, G*010106, G*010107, G*010108, G*0102, G*0103, G*010401, G*010402, G*010403, G*0105N, G*0106.

HLA-DRA

[0076] DRA*0101, DRA*010201, DRA*010202.

HLA-DRB1

[0077] DRB1*010101, DRB1*010102, DRB1*010103, DRB1*010201, DRB1*010202, DRB1*010203, DRB1*010204, DRB1*0103, DRB1*0104, DRB1*0105, DRB1*0106, DRB1*0107, DRB1*0108, DRB1*0109, DRB1*0110, DRB1*0111, DRB1*030101, DRB1*030102, DRB1*030201, DRB1*030202, DRB1*0303, DRB1*0304, DRB1*030501, DRB1*030502, DRB1*0306, DRB1*0307, DRB1*0308, DRB1*0309, DRB1*0310, DRB1*0311, DRB1*0312, DRB1*0313, DRB1*0314, DRB1*0315, DRB1*0316, DRB1*0317, DRB1*0318, DRB1*0319, DRB1*0320, DRB1*0321, DRB1*0322, DRB1*0323, DRB1*0324, DRB1*0325, DRB1*0326, DRB1*0327, DRB1*0328, DRB1*040101, DRB1*040102, DRB1*0402, DRB1*040301, DRB1*040302, DRB1*0404, DRB1*040501, DRB1*040502, DRB1*040503, DRB1*040504, DRB1*0406, DRB1*040701, DRB1*040702, DRB1*040703, DRB1*0408, DRB1*0409, DRB1*0410, DRB1*0411, DRB1*0412, DRB1*0413, DRB1*0414, DRB1*0415, DRB1*0416, DRB1*0417, DRB1*0418, DRB1*0419, DRB1*0420, DRB1*0421, DRB1*0422, DRB1*0423, DRB1*0424, DRB1*0425, DRB1*0426, DRB1*0427, DRB1*0428, DRB1*0429, DRB1*0430, DRB1*0431, DRB1*0432, DRB1*0433, DRB1*0434, DRB1*0435, DRB1*0436, DRB1*0437, DRB1*0438, DRB1*0439, DRB1*0440, DRB1*0441, DRB1*0442, DRB1*0443, DRB1*0444, DRB1*0445, DRB1*0446, DRB1*0447, DRB1*0448, DRB1*0449, DRB1*0450, DRB1*070101, DRB1*070102, DRB1*0703, DRB1*0704, DRB1*0705, DRB1*0706, DRB1*0707, DRB1*0708, DRB1*080101, DRB1*080102, DRB1*080201, DRB1*080202, DRB1*080203, DRB1*080302, DRB1*080401, DRB1*080402, DRB1*080403, DRB1*080404, DRB1*0805, DRB1*0806, DRB1*0807, DRB1*0808, DRB1*0809, DRB1*0810, DRB1*0811, DRB1*0812, DRB1*0813, DRB1*0814, DRB1*0815, DRB1*0816, DRB1*0817, DRB1*0818, DRB1*0819, DRB1*0820, DRB1*0821, DRB1*0822, DRB1*0823, DRB1*0824, DRB1*0825, DRB1*0826, DRB1*0827, DRB1*0828, DRB1*0829, DRB1*090102, DRB1*090103, DRB1*0902, DRB1*0903, DRB1*100101, DRB1*100102, DRB1*110101, DRB1*110102, DRB1*110103, DRB1*110104, DRB1*110105, DRB1*1102, DRB1*1103, DRB1*110401, DRB1*110402, DRB1*1105, DRB1*110601, DRB1*110602, DRB1*1107, DRB1*110801, DRB1*110802, DRB1*1109, DRB1*1110, DRB1*1111, DRB1*111201, DRB1*111202, DRB1*1113, DRB1*1114, DRB1*1115, DRB1*1116, DRB1*1117, DRB1*1118, DRB1*1119, DRB1*1120, DRB1*1121, DRB1*1122, DRB1*1123, DRB1*1124, DRB1*1125, DRB1*1126, DRB1*112701, DRB1*112702, DRB1*1128, DRB1*1129, DRB1*1130, DRB1*1131, DRB1*1132, DRB1*1133, DRB1*1134, DRB1*1135, DRB1*1136, DRB1*1137, DRB1*1138, DRB1*1139, DRB1*1140, DRB1*1141, DRB1*1142, DRB1*1143, DRB1*1144, DRB1*1145, DRB1*1146, DRB1*1147, DRB1*1148, DRB1*1149, DRB1*1150, DRB1*1151, DRB1*1152, DRB1*1153, DRB1*1154, DRB1*120101, DRB1*120102, DRB1*120201, DRB1*120202, DRB1*120302, DRB1*1204, DRB1*1205, DRB1*1206, DRB1*1207, DRB1*1208, DRB1*1209, DRB1*1210, DRB1*130101, DRB1*130102, DRB1*130103, DRB1*130201, DRB1*130202, DRB1*130301, DRB1*130302, DRB1*1304, DRB1*1305, DRB1*1306, DRB1*130701, DRB1*130702, DRB1*1308, DRB1*1309, DRB1*1310, DRB1*1311, DRB1*1312, DRB1*1313, DRB1*131401, DRB1*131402, DRB1*1315, DRB1*1316, DRB1*1317, DRB1*1318, DRB1*1319, DRB1*1320, DRB1*1321, DRB1*1322, DRB1*1323, DRB1*1324, DRB1*1325, DRB1*1326, DRB1*1327, DRB1*1328, DRB1*1329, DRB1*1330, DRB1*1331, DRB1*1332, DRB1*1333, DRB1*1334, DRB1*1335, DRB1*1336, DRB1*1337, DRB1*1338, DRB1*1339, DRB1*1340, DRB1*1341, DRB1*1342, DRB1*1343, DRB1*1344, DRB1*1345, DRB1*1346, DRB1*1347, DRB1*1348, DRB1*1349, DRB1*1350, DRB1*1351, DRB1*1352, DRB1*1353, DRB1*1354, DRB1*1355, DRB1*1356, DRB1*1357, DRB1*1358, DRB1*1359, DRB1*1360, DRB1*1361, DRB1*1362, DRB1*1363, DRB1*1364, DRB1*1365, DRB1*140101, DRB1*140102, DRB1*1402, DRB1*140301, DRB1*140302, DRB1*1404, DRB1*140501, DRB1*140502, DRB1*1406, DRB1*140701, DRB1*140702, DRB1*1408, DRB1*1409, DRB1*1410, DRB1*1411, DRB1*1412, DRB1*1413, DRB1*1414, DRB1*1415, DRB1*1416, DRB1*1417, DRB1*1418, DRB1*1419, DRB1*1420, DRB1*1421, DRB1*1422, DRB1*1423, DRB1*1424, DRB1*1425, DRB1*1426, DRB1*1427, DRB1*1428, DRB1*1429, DRB1*1430, DRB1*1431, DRB1*1432, DRB1*1433, DRB1*1434, DRB1*1435, DRB1*1436, DRB1*1437, DRB1*1438, DRB1*1439, DRB1*1440, DRB1*1441, DRB1*1442, DRB1*1443, DRB1*1444, DRB1*1445, DRB1*1446, DRB1*1447, DRB1*1448, DRB1*150101, DRB1*150102, DRB1*150103, DRB1*150104, DRB1*150105, DRB1*150201, DRB1*150202, DRB1*150203, DRB1*1503, DRB1*1504, DRB1*1505, DRB1*1506, DRB1*1507, DRB1*1508, DRB1*1509, DRB1*1510, DRB1*1511, DRB1*1512, DRB1*1513, DRB1*1514, DRB1*1515, DRB1*1516, DRB1*160101, DRB1*160102, DRB1*160201, DRB1*160202, DRB1*1603, DRB1*1604, DRB1*160501, DRB1*160502, DRB1*1607, DRB1*1608.

HLA-DRB2-9

[0078] DRB2*0101, DRB3*010101, DRB3*01010201, DRB3*01010202, DRB3*010103, DRB3*010104, DRB3*0102, DRB3*0103, DRB3*0104, DRB3*0105, DRB3*0106, DRB3*0107, DRB3*0108, DRB3*0109, DRB3*0110, DRB3*0111, DRB3*0201, DRB3*020201, DRB3*020202, DRB3*020203, DRB3*020204, DRB3*0203, DRB3*0204, DRB3*0205, DRB3*0206, DRB3*0207, DRB3*0208, DRB3*0209, DRB3*0210, DRB3*0211, DRB3*0212, DRB3*0213, DRB3*0214, DRB3*0215, DRB3*0216, DRB3*0217, DRB3*0218, DRB3*0219, DRB3*030101, DRB3*030102, DRB3*0302, DRB3*0303, DRB4*01010101, DRB4*0102, DRB4*01030101, DRB4*01030102N, DRB4*010302, DRB4*010303, DRB4*010304, DRB4*0104, DRB4*0105, DRB4*0106, DRB4*0107, DRB4*0201N, DRB4*0301N, DRB5*010101, DRB5*010102, DRB5*0102, DRB5*0103, DRB5*0104, DRB5*0105, DRB5*0106, DRB5*0107, DRB5*0108N, DRB5*0109, DRB5*0110N, DRB5*0111, DRB5*0112, DRB5*0113, DRB5*0202, DRB5*0203, DRB5*0204, DRB5*0205, DRB6*0101, DRB6*0201, DRB6*0202, DRB7*010101, DRB7*010102, DRB8*0101, DRB9*0101.

HLA-DQA1

[0079] DQA1*010101, DQA1*010102, DQA1*010201, DQA1*010202, DQA1*0103, DQA1*010401, DQA1*010402, DQA1*0105, DQA1*0106, DQA1*0107, DQA1*0201, DQA1*030101, DQA1*0302, DQA1*0303, DQA1*040101, DQA1*040102, DQA1*0402, DQA1*0403N, DQA1*0404, DQA1*050101, DQA1*050102, DQA1*0502, DQA1*0503, DQA1*0504, DQA1*0505, DQA1*060101, DQA1*060102, DQA1*0602.

HLA-DQB1

[0080] DQB1*020101, DQB1*020102, DQB1*0202, DQB1*0203, DQB1*030101, DQB1*030102, DQB1*030201, DQB1*030202, DQB1*030302, DQB1*030303, DQB1*0304, DQB1*030501, DQB1*030502, DQB1*030503, DQB1*0306, DQB1*0307, DQB1*0308, DQB1*0309, DQB1*0310, DQB1*0311, DQB1*0312, DQB1*0313, DQB1*0401, DQB1*0402, DQB1*050101, DQB1*050102, DQB1*050201, DQB1*050202, DQB1*050301, DQB1*050302, DQB1*0504, DQB1*060101, DQB1*060102, DQB1*060103, DQB1*0602, DQB1*0603, DQB1*060401, DQB1*060402, DQB1*060501, DQB1*060502, DQB1*0606, DQB1*0607, DQB1*0608, DQB1*0609, DQB1*0610, DQB1*061101, DQB1*061102, DQB1*0612, DQB1*0613, DQB1*0614, DQB1*0615, DQB1*0616, DQB1*0617, DQB1*0618, DQB1*0619, DQB1*0620, DQB1*0621, DQB1*0622, DQB1*0623.

HLA-DPA1

[0081] DPA1*010301, DPA1*010302, DPA1*010303, DPA1*0104, DPA1*0105, DPA1*0106, DPA1*0107, DPA1*0108, DPA1*020101, DPA1*020102, DPA1*020103, DPA1*020104, DPA1*020105, DPA1*020106, DPA1*020201, DPA1*020202, DPA1*020203, DPA1*0203, DPA1*0301, DPA1*0302, DPA1*0303, DPA1*0401.

HLA-DPB1

[0082] DPB1*010101, DPB1*010102, DPB1*010103, DPB1*0102, DPB1*020102, DPB1*020103, DPB1*020104, DPB1*020105, DPB1*020106, DPB1*0202, DPB1*0203, DPB1*030101, DPB1*030102, DPB1*0302, DPB1*040101, DPB1*040102, DPB1*0402, DPB1*0501, DPB1*0601, DPB1*0801, DPB1*0901, DPB1*1001, DPB1*110101, DPB1*110102, DPB1*1301, DPB1*1401, DPB1*1501, DPB1*1601, DPB1*1701, DPB1*1801, DPB1*1901, DPB1*200101, DPB1*200102, DPB1*2101, DPB1*2201, DPB1*2301, DPB1*2401, DPB1*2501, DPB1*260101, DPB1*260102, DPB1*2701, DPB1*2801, DPB1*2901, DPB1*3001, DPB1*3101, DPB1*3201, DPB1*3301, DPB1*3401, DPB1*3501, DPB1*3601, DPB1*3701, DPB1*3801, DPB1*3901, DPB1*4001, DPB1*4101, DPB1*4401, DPB1*4501, DPB1*4601, DPB1*4701, DPB1*4801, DPB1*4901, DPB1*5001, DPB1*5101, DPB1*5201, DPB1*5301, DPB1*5401, DPB1*5501, DPB1*5601, DPB1*5701, DPB1*5801, DPB1*5901, DPB1*6001, DPB1*6101N, DPB1*6201, DPB1*6301, DPB1*6401N, DPB1*6501, DPB1*6601, DPB1*6701, DPB1*6801, DPB1*6901, DPB1*7001, DPB1*7101, DPB1*7201, DPB1*7301, DPB1*7401, DPB1*7501, DPB1*7601, DPB1*7701, DPB1*7801, DPB1*7901, DPB1*8001, DPB1*8101, DPB1*8201, DPB1*8301, DPB1*8401, DPB1*8501, DPB1*8601, DPB1*8701, DPB1*8801, DPB1*8901, DPB1*9001, DPB1*9101, DPB1*9201, DPB1*9301, DPB1*9401, DPB1*9501, DPB1*9601, DPB1*9701, DPB1*9801, DPB1*9901.

HLA-DMA

[0083] DMA*0101, DMA*0102, DMA*0103, DMA*0104.

HLA-DMB

[0084] DMB*0101, DMB*0102, DMB*0103, DMB*0104, DMB*0105, DMB*0106.

HLA-DOA

[0085] DOA*010101, DOA*01010201, DOA*01010202, DOA*01010203, DOA*010103, DOA*01010401, DOA*01010402, DOA*010105.

HLA-DOB

[0086] DOB*01010101, DOB*01010102, DOB*010102, DOB*010201, DOB*010202, DOB*0103, DOB*01040101, DOB*01040102.

MHC Class I

[0087] H-2 Db, H-2Dd, H-2Dk, H-2Dq, H-2 Kb, H-2 Kd, H-2Kk, H-2Ld, H-2M3, H-2Ad, H-2Ag7, H-2Ak, H2-Ab, H-2Ed, H-2Ek, H-2Bxk, H-2F, H-21, H-2P, H-2R, H-2S, H-2Sxd, H-2T4, H-2U.

MHC Class II

[0088] I-Ab, I-Ad, I-Ag7, I-Ak, I-Ap, I-Aq, I-Ar, I-As, I-Au, I-Av, I-Ea, I-Eb, I-Ed, I-Ek, I-Es, I-Eu, H-2Q, H-2Qa-2, H-2Qa-2a, Qa-1a, Qa-1b.

[0089] The invention is not limited to such MHC and HLA molecules, and can be adapted to newly discovered such molecules, if desired, simply by establishing the reactivity of substances such as peptides with the molecules. This can be readily achieved using known techniques that are standard in the field. Particularly preferred HLA alleles for use with the present invention include the following:

TABLE-US-00005 HLA Class I HLA A HLA B HLA Cw A*6802 B*5801 Cw*1701 A*6801 B*5701 Cw*1601 A*6601 B*5501 Cw*1502 A*3303 B*5201 Cw*1402 A*3301 B*5101 Cw*1203 A*3201 B*5001 Cw*0802 A*310102 B*4901 Cw*0801 A*3002 B*4501 Cw*0704 A*3001 B*4403 Cw*0703 A*2902 B*4402 Cw*0702 A*2608 B*41O1 Cw*0701 A*2601 B*4002 Cw*0602 A*2501 B*4001 Cw*0501 A*2402 B*3901 Cw*0401 A*2301 B*3801 Cw*0304 A*1101 B*3701 Cw*0303 A*0302 B*3503 Cw*0202 A*0301 B*3501 Cw*0102 A*0205 B*2705 A*0201 B*1801 A*0101 B*1501 B*1402 B*1401 B*1302 B*0801 B*0705 B*0702

TABLE-US-00006 HLA Class II HLA DPB HLA DQA HLA DQB HLA DRB DPB1*1701 DQA1*0505 DQB1*0604 DRB1*1601 DPB1*1301 DQA1*0501 DQB1*0603 DRB1*1501 DPB1*1001 DQA1*0401 DQB1*0602 DRB1*1401 DPB1*0601 DQA1*0303 DQB1*0503 DRB1*1302 DPB1*0501 DQA1*0302 DQB1*0502 DRB1*1301 DPB1*0402 DQA1*0301 DQB1*0501 DRB1*1201 DPB1*0401 DQA1*0201 DQB1*0402 DRB1*1104 DPB1*0301 DQA1*0104 DQB1*0303 DRB1*1101 DPB1*0201 DQA1*0103 DQB1*0302 DRB1*0801 DPB1*0101 DQA1*0102 DQB1*0301 DRB1*0701 DQA1*0101 DQB1*0202 DRB1*0404 DQB1*0201 DRB1*0401 DRB1*0301 DRB1*0103 DRB1*0102 DRB1*0101

[0090] The most preferred alleles according to the invention are the following:

[0091] HLA-A*0201, HLA-A*0206, HLA-A*0301, HLA-A*1101, HLA-A*2402, HLA-A*3401, HLA-B*0702, HLA-B*0801, HLA-B*1301, HLA-B*27, HLA-B*4002, HLA-B*5101, HLA-Cw*03, HLA-cW*07

[0092] HLA-DRB1*0301, HLA-DRB1*0401, HLA-DRB1*0701, HLA-DRB1*1501, HLA-DRB1*1104, HLA-DRB1*1101, HLA-DRB4*0101

[0093] HLA-DQA1*01, HLA-DQA1*02, HLA-DQA1*05

[0094] HLA-DQB1*03, HLA-DQB1*04, HLA-DQB1*05, HLA-DQB1*06

[0095] HLA-DPA1*01, HLA-DPA1*02

[0096] HLA-DPB1*02, HLA-DPB1*04

[0097] The invention will now be described by way of example only, with reference to the following specific embodiments.

EXAMPLES

Experiment 1

Reactivity of Polypeptides Against Influenza Antigens

[0098] The purpose of the study was to demonstrate the reactivity of the above-described influenza polypeptides and their ability to induce a specific Th1-type cytokine response against naturally processed and presented influenza proteins in the context of human HLA (HLA A*0201).

[0099] As background to the experiments, it is useful to understand that Th1 and Th2 responses are defined by the pattern of cytokines produced by the T helper cells involved in them. That, however, does not mean that the remaining lymphocytes (T and B cells) involved in those specific responses do not also produce cytokines that help drive the characteristic pattern of response in which they are involved. In this way, a Th1-like response is characterised by the production of IFN-γ and IL-2, leading to the stimulation of a CD8.sup.+ CTL response and an associated (in mice) IgG2a antibody response. The IFN-γ response can be produced both by the CD4.sup.+ T helper 1 cells as well as by the CD8.sup.+ T cells that also form part of it. In this case the IFN-γ component of the response produced by the CD8.sup.+ T cells was investigated. That was because the experiment was primarily investigating CD8.sup.+ T cell epitopes and it was desirable to prove that the response seen was caused by those cells. Since CD8.sup.+ T cells react to epitopes only on MHC class I molecules, human cells that share with the transgenic mouse only one MHC class I molecule (i.e. HLA-A*0201) were used. A Th2-like response is characterised by the production of IL-4 and IL-10, leading to the stimulation of an IgGE, IgG1 and (in mice) IgG2b antibody response. Both responses are antagonistic with IFN-γ and IL-10 downregulating the production of each other. All the experiments described below were carried out in duplicate.

Materials and Methods

Peptides and Recombinant Proteins

[0100] All the polypeptides used in this study (i.e. P1: MIA amino acid (aa) 36 to 75 (SEQ ID 1); P2: M1B aa 124 to 158 (SEQ ID 2); P3: NPA aa 255 to 275 (SEQ ID 3); P4: NPB aa 306 to 326 (SEQ ID 4); P5: PB1 aa 395 to 428 (SEQ ID 5); P6: M2 aa 32 to 55 (SEQ ID 6) and NRP: a control non-relevant polypeptide) were synthesised by Fmoc chemistry and resuspended in 10% DMSO in PBS.

Cell Lines and Viruses

[0101] The T1 and JURKAT cell lines are human lymphoblastoid lines derived from HLA-A*0201 bearing and non-bearing individuals respectively. T1 was maintained in IMDM medium (Invitrogen) whilst JURKAT was maintained in RPMI-1640 medium (Sigma) containing 10 mM HEPES and 1 mM sodium pyruvate. Both media were supplemented with 50 IU/50 mg/ml of penicillin/streptomycin (Sigma) and, as complete medium, 10% FCS. Cell cultures were maintained at 37° C. in a humidified atmosphere of 5% CO.sub.2.

[0102] Primary splenocytes were maintained in IMDM medium (Invitrogen) supplemented with 0.02 mM p-mercaptoethanol (Sigma), 50 IU/50 mg/ml of penicillin/streptomycin (Sigma) and 10% FCS (Sigma) at 37° C. in a humidified atmosphere of 5% CO.sub.2.

[0103] Influenza A strains New_Calcdonia/20/99, NYMC/X-147 and Influenza B strain Johannesburg/5/99 were obtained from NIBSC as lyophilised stocks and used for the infection of syngeneic (T1) and allogeneic (JURKAT) human cell lines.

Preparation of Target Cells for Cytokine Analysis

[0104] Cell cultures in exponential phase were harvested by centrifugation (250 g, 5 min) and resuspended at a density of 10.sup.6 cells/ml in serum-free medium. Aliquots of the cell suspensions were transfected with a range of polypeptide antigens at a concentration of 5 μg per 10.sup.6 cells using Lipofectin (Invitrogen) according to the manufacturers instructions and incubated in complete medium for 8-10 hours before Mytomicin C (MMC) treatment. Alternatively, aliquots of the cell suspensions were infected with a range of live Influenza virus (MOI of 5-10) for one hour, washed twice in serum free medium and incubated in complete medium for 24 hours before MMC treatment.

[0105] For MMC treatment, cells were harvested by centrifugation (250 g, 5 min) and resuspended in serum-free IMDM medium containing 50 μg/ml of Mitomycin C (Sigma). After 45 min incubation at 37° C., the cell suspensions were washed four times in serum-free IMDM medium (250 g, 5 min) and finally resuspended in complete IMDM medium.

Immunizations

[0106] Seven to ten week old C57BL/6-Tg(HLA-A2.1)1Enge/J mice (HLA-A*0201 transgenic on a C57/BL6 background, Jackson Labs) were immunised subcutaneously with a 200 μl dose of the antigen preparation per mouse. In the test group, each dose of the antigen preparation contained 60 nmol of an equimolar mixture of all six peptides (10 nmol each) prepared in IFA (Sigma) according to the manufacturers instructions (FLU-v preparation). In the control group, each dose of the antigen preparation contained an equivalent dose of the non-relevant polypeptide prepared in IFA (Sigma) according to the manufacturers instructions (NRP preparation).

[0107] On day 14 post-immunisation, all animals received a booster immunisation using the same doses and route of delivery as used originally. Finally, on day 21 or 22, all animals were culled and their spleens collected.

[0108] The immunisation protocol can be represented schematically as shown in FIG. 4.

Statistical Analysis

[0109] Statistically significant differences in the IFN-γ response to different antigens between FLU-v and NRP vaccinated animals were established through non-parametric Mann-Whitney analysis of the samples. Differences were considered statistically significant if the p value was below 0.05.

Cytokine ELISA

[0110] Mouse spleens belonging to the same experimental group were pooled, gently pressed through cell strainers and red blood cells removed by treatment with red cell lysis buffer (nine parts 0.16 M NH.sub.4Cl and one part of 0.17 M Tris, pH 7.2). Splenocyte suspensions from each experimental group were plated in 24-well plates at a density of 4×10.sup.6 cells/well containing a range of polypeptide antigens (5 μg/ml) or, alternatively, MMC treated cell lines (splenocyte to cell (S:C) ratio 10:1) either transfected with polypeptide antigens or infected with different live Influenza virus as described above.

[0111] After 4 days incubation at 37° C., the supernatant was collected and analyzed for IFN-γ and IL-4 by a sandwich cytokine ELISA according to the manufacturers protocol (Pharmingen). The lower detection limits for the assay were 9.77 μg/ml for IL-4 and 39.06 μg/ml for IFN-γ.

Results

[0112] Each individual polypeptide peptide described in this patent application (including P1, P2, P3, P4, P5 and P6 tested in this example) has been defined as containing T cell epitopes reactive in multiple human HLA molecules, amongst them HLA-A*0201. The aim of this study is, therefore, to assess the ability of the above described polypeptides to induce a specific multi-antigen Th1-like immune (i.e. IFN-γ mediated) response as well as the ability of this response to specifically react to naturally processed and presented Influenza antigens from several non-related strains pathogenic to humans in the context of infected human HLA A*0201 bearing cells.

Reactivity of Peptide 1

[0113] Upon internal processing of the polypeptide by the antigen presenting cells (APCs) of the transgenic mice, the contained CD8.sup.+ T cell specific epitopes would be presented in the surface of the APC in association with the HLA-A*0201 molecules where they would proceed to activate naive CD8.sup.+ T cells and induce a P1 specific Th1-like immune response.

[0114] To confirm this, HLA-A*0201 bearing (T1) and non-bearing (JURKAT) human cell lines were intracellularly loaded with P1 by means of a lipid vehicle (Lipofectin, INVITROGEN). Splenocytes from animals immunised with the influenza polypeptide preparation (FLU-v) were found to produce significantly increased levels of IFN-γ compared to splenocytes from NRP immunised animals when co-cultured with MMC treated HLA-A*0201 bearing human cells (T1) transfected with P1, but not when co-cultured with non-HLA-A*0201 bearing human cells (JURKAT) treated in the same way (see FIG. 1A, the data for which is presented in Table 1 below).

TABLE-US-00007 TABLE 1 Δ IFN-γ to Lys (pg/ml) FLU-v NRP Con A 2395.6 ± 45.9 2257.5 ± 29.8 FLU Peptide 1 (sol) 119.3 ± 7.1 <39 T1-FLU pep 1 (pro)  228.4 ± 16.6 55.8 ± 7  Ju-FLU pep 1 (pro) <39  51.2 ± 1.6 Note: “Lys” means the negative control background upon which all values are calculated. “Sol” means soluble peptide presented to the primary splenocyte population. “Pro” means that the peptide is being presented complexed with the cell's HLA molecules following internal processing and loading of the resulting epitopes on to the MHC molecules. Values represent average ± standard error of the Δ IFN-γ to Lys (pg/ml).

[0115] The experiment can be represented schematically as shown in FIG. 5 and FIG. 6.

[0116] As the transgenic mice used in these experiments do not bear any other human HLA and the ability of its CD8.sup.+ T cells to specifically recognise P1-derived epitopes in the context of other human HLAs which they have never encountered is low, these results clearly show that the observed IFN-γ response is specifically caused by primed CD8.sup.+ T cells recognising P1-derived epitopes in association with HLA-A*0201 molecules.

[0117] It is also important to note that no IL-4 response was detected against the P1 transfected cells in either FLU-v or NRP immunised animals (data not shown). Since IL-4 production is antagonistic to IFN-γ production and hence to the creation of antigen specific CD8.sup.+ T cell responses, the lack of IL-4 production in both groups clearly shows that immunisation with FLU-v induces a specific Th1-like response to the P1 component of the preparation.

[0118] A significantly increased level in IFN-γ production is also observed in the FLU-v compared to the NRP immunised groups when soluble P1 antigen is simply added to the splenocyte culture (in the absence of T1 or JURKAT cells). However, the overall level of this IFN-γ response is lower than that observed when the antigen was presented via the HLA-A*0201 bearing T1 cells. The explanation for this observation is that P1 was defined on the basis of containing epitopes that are primarily reactive in the context of human and not mouse HLAs. The transgenic mice here used contain a full complement of mouse MHC molecules in addition to the HLA-A*0201 molecules, hence the soluble P1 captured by the APC population present in the primary splenocyte cultures can also be processed into the mouse MHC Class I and II pathways (Peachman K K, Rao M, Alving C R, Palmer D R, Sun W, Rothwell S W. “Human dendritic cells and macrophages exhibit different intracellular processing pathways for soluble and liposome-encapsulated antigens.” Immunobiology. 2005; 210(5):321-33), which mediate H-2D restricted CD8.sup.+ and CD4.sup.+ T cell responses respectively. As a result, if P1 contained multiple murine epitopes, it would be expected that the IFN-γ response to soluble P1 would be equal or greater to that observed for the case of human cell mediated presentation as a much larger pool of CD4.sup.+ and CD8.sup.+ T cells would be able to react to the stimulus. As this is not observed and the level of an immune response in vitro is primarily determined by the availability of antigen, it clearly follows that the P1-specific CD8.sup.+ T lymphocytes detected in the T1 co-culture experiments would simply be unable to respond at the same level due to the reduced amount of antigen being presented to them in the correct HLA-A*0201 context.

[0119] Reactivity of Peptide 2

[0120] Splenocytes from animals immunised with the FLU-v have been found to produce significantly increased levels of IFN-γ compared to splenocytes from NRP immunised animals when co-cultured with MMC treated HLA-A*0201 bearing human cells (T1) transfected with P2, but not when co-cultured with non-HLA-A*0201 bearing human cells (JURKAT) treated in the same way (see FIG. 1B, the data for which is set out in Table 2 below). As it was the case for P1, these results clearly show that the observed IFN-γ response is specifically caused by CD8.sup.+ T cells recognising P2-derived epitopes in association with HLA-A*0201 molecules. Similarly, as IL-4 production is antagonistic to IFN-γ production and hence to the development of CD8.sup.+ T cells, the lack of an IL-4 response against P2 transfected cells in either FLU-v or NRP immunised animals (data not shown) clearly shows that FLU-v immunisation induces a P2-specific Th1-like response.

TABLE-US-00008 TABLE 2 Δ IFN-γ to Lys (pg/ml) FLU-v NRP Con A 2395.6 ± 45.9 2257.5 ± 29.8  FLU Peptide 1 (sol)  976.9 ± 24.1 468.4 ± 14.7 T1-FLU pep 1 (pro) 372.9 ± 6.4 154.5 ± 10.7 Ju-FLU pep 1 (pro) <39 <39 Note: “Lys” means the negative control background upon which all values are calculated. “Sol” means soluble peptide presented to the primary splenocyte population. “Pro” means that the peptide is being presented complexed with the cell's HLA molecules following internal processing and loading of the resulting epitopes on to the MHC molecules. Values represent average ± standard error of the Δ IFN-γ to Lys (pg/ml).

[0121] A significantly increased IFN-γ production was also observed in the FLU-v compared to NRP immunised groups when P2 was simply added to the splenocyte culture. In contrast to P1, however, the overall level of the IFN-γ response was greater to the soluble antigen than to that presented by the HLA-A*0201 bearing cells. This observation would indicate that P2 harbours not only strong HLA-A*0201 epitopes but also strong mouse (H-2D) epitopes.

Reactivity of Peptides 3, 4 and 5

[0122] As was the case for P2, significantly increased IFN-γ production can be observed between FLU-v and NRP immunised groups when P3, P4 and P5 are simply added to the culture as well as when they are presented via HLA-matched transfected human cells lines (T1), but not when they are presented via HLA-mismatched (JURKAT) human cell lines (see FIGS. 1C, 1D and 1E, the data for which is set out in Tables 3-5 below). In all three cases, the increment in IFN-γ production is greater when splenocytes are co-cultured with transfected human cells rather than when soluble antigen is simply added to the medium. These results, due to the same arguments developed for the case of P2, indicate that P3, P4 and P5 contain a number of strong mouse T cell epitopes in addition to the human ones.

TABLE-US-00009 TABLE 3 Δ IFN-γ to Lys (pg/ml) FLU-v NRP Con A 2395.6 ± 45.9 2257.5 ± 29.8 FLU Peptide 1 (sol) 1734.1 ± 57.2  268.0 ± 11.0 T1-FLU pep 1 (pro)  587.5 ± 14.9 <39 Ju-FLU pep 1 (pro) 148.5 ± 3.0  146.5 ± 17.6 Note: “Lys” means the negative control background upon which all values are calculated. “Sol” means soluble peptide presented to the primary splenocyte population. “Pro” means that the peptide is being presented complexed with the cell's HLA molecules following internal processing and loading of the resulting epitopes on to the MHC molecules. Values represent average ± standard error of the Δ IFN-γ to Lys (pg/ml).

TABLE-US-00010 TABLE 4 Δ IFN-γ to Lys (pg/ml) FLU-v NRP Con A 2395.6 ± 45.9 2257.5 ± 29.8 FLU Peptide 1 (sol) 1170.5 ± 27.8 693.8 ± 5.6 T1-FLU pep 1 (pro)  229.9 ± 35.2  84.6 ± 11.6 Ju-FLU pep 1 (pro) <39 <39 Note: “Lys” means the negative control background upon which all values are calculated. “Sol” means soluble peptide presented to the primary splenocyte population. “Pro” means that the peptide is being presented complexed with the cell's HLA molecules following internal processing and loading of the resulting epitopes on to the MHC molecules. Values represent average ± standard error of the Δ IFN-γ to Lys (pg/ml).

TABLE-US-00011 TABLE 5 Δ IFN-γ to Lys (pg/ml) FLU-v NRP Con A 2395.6 ± 45.9 2257.5 ± 29.8 FLU Peptide 1 (sol) 1067.75 ± 7.3  220.5 ± 6.6 T1-FLU pep 1 (pro)  405.6 ± 11.8 <39 Ju-FLU pep 1 (pro) <39 <39 Note: “Lys” means the negative control background upon which all values are calculated. “Sol” means soluble peptide presented to the primary splenocyte population. “Pro” means that the peptide is being presented complexed with the cell's HLA molecules following internal processing and loading of the resulting epitopes on to the MHC molecules. Values represent average ± standard error of the Δ IFN-γ to Lys (pg/ml).

[0123] Finally, as all three peptides fail to induce the production of IL-4 (data not shown), it is clear that the immune response induced by vaccination with the FLU-v preparation induces a Th1-like response to each of these three polypeptides.

Reactivity of Peptide 6

[0124] As was the case for P1, significantly increased IFN-γ production can be observed between FLU-v and NRP immunised groups when P6 is simply added to the culture as well as when it is presented via HLA-matched transfected human cells lines (T1), but not when it is presented via HLA-mismatched (JURKAT) human cell lines (see FIG. 1F, the data for which is set out in Table 6 below). Again as for P1, the greater response is observed to the soluble antigen, indicating that P6 does not contain strong H-2D epitopes. As the causes for these observations have already been explained for the case of P1 they shall not be developed further here and one shall refer to that earlier section.

TABLE-US-00012 TABLE 6 Δ IFN-γ to Lys (pg/ml) FLU-v NRP Con A 2395.6 ± 45.9 2257.5 ± 29.8 FLU Peptide 1 (sol)  496.2 ± 11.8 105.5 ± 7.0 T1-FLU pep 1 (pro) 1210.5 ± 11.5 817.6 ± 8.9 Ju-FLU pep 1 (pro) <39 <39 Note: “Lys” means the negative control background upon which all values are calculated. “Sol” means soluble peptide presented to the primary splenocyte population. “Pro” means that the peptide is being presented complexed with the cell's HLA molecules following internal processing and loading of the resulting epitopes on to the MHC molecules. Values represent average ± standard error of the Δ IFN-γ to Lys (pg/ml).

[0125] The failure of stimulation with P6 to induce any IL-4 production (data not shown), clearly show that the immune response induced by FLU-v vaccination induces a Th1-like response to P6.

Reactivity of FLU-v to Non-Related Influenza Strains

[0126] The experiments described up to this point clearly show that immunisation with FLU-v induces a specific CD8.sup.+ T cell IFN-γ response against each of the six constituent polypeptides. However, as these polypeptides were defined as containing reactive CD8.sup.+ T cell epitopes subject to a low level of sequence variability within the influenza virus population analyzed, it was also desirable to establish whether FLU-v vaccinated mice were capable of recognising, and hence inducing a specific Th1-like immune response, T cell epitopes naturally processed and presented following infection with different non-related strains of influenza. Such analysis provides a clear indication of the potential efficacy of the FLU-v polypeptide mixture as an influenza vaccine which, by virtue of targeting T cell epitopes of low sequence variability across the human and animal influenza population, would provide protection against all current strains as well as those which may arise in the future from spontaneous recombination between highly pathogenic animal strains with current human strains.

[0127] For this analysis, primary splenocyte cultures of transgenic animals immunised with FLU-v or NRP were co-cultured with several influenza infected HLA-A*0201 bearing (T1) and non-bearing (JURKAT) human cells. The three influenza strains used for infection (A/New_Calcdonia/20/99, A/NYMC/X-147 and B/Johannesburg/5/99) are all pathogenic to humans and were obtained from the Influenza WHO repository, based at NIBSC (UK). As an antigen specific positive control an equimolar soluble preparation of the six polypeptides added to the primary splenocyte preparation was used.

[0128] Splenocytes from FLU-v vaccinated animals produced a significantly higher level of IFN-γ compared to those of NRP vaccinated animals when co-cultured with MMC treated influenza infected HLA-A*0201 bearing human cells (T1) transfected, but not when co-cultured with non-HLA-A*0201 bearing human cells (JURKAT) treated in the same way (see FIG. 2, the data for which is set out in Table 7 below). No IL-4 response was detected in any of the vaccinated mice against either the soluble polypeptide antigen or the Influenza infected cells (data not shown). These results clearly show that the observed IFN-γ response is specifically caused by primed CD8.sup.+ T cells recognising epitopes contained in the FLU-v preparation and which are also naturally processed and presented in association with HLA-A*0201 molecules in influenza infected human cells.

TABLE-US-00013 TABLE 7 Δ IFN-γ to Lys (pg/ml) FLU-v NRP Con A 2395.6 ± 45.9 2257.5 ± 29.8 FLU peptide mix (sol) 1440.2 ± 44.9  678.3 ± 29.2 T1-FIU A/NC/20/99 2146.4 ± 23.7 1282.1 ± 4.8  Ju-Flu A/NC/20/99 1246.9 ± 48.8 1206.4 ± 10.9 T1-FIU A/NYMC/X147 1949.4 ± 37.9  1101 ± 5.9 Ju-Flu A/NYMC/X147 1342.3 ± 14.5 1248.6 ± 8.3  T1-Flu B/Johannesburg/5/99 1769.0 ± 33.6 1196.0 ± 16.2 Ju-Flu B/Johannesburg/5/99 257.6 ± 3.0 257.0 ± 8.3 Note: “Lys” means the negative control background upon which all values are calculated. “Sol” means soluble peptide presented to the primary splenocyte population. “Pro” means that the peptide is being presented complexed with the cell's HLA molecules following internal processing and loading of the resulting epitopes on to the MHC molecules. T1 is the HLA-A*0201-bearing human cell line. “Ju” refers to JURKAT which is the HLA-A*0201 non-bearing human cell line. A/NC/20/99(i.e. A/New_Caledonia/20/99), A/NYMC/X-147 and B/Johannesburg/5/99 are, respectively, the two influenza A and one influenza B strains used for infection of the human cell lines. Values represent average ± standard error of the Δ IFN-γ to Lys (pg/ml).

[0129] Interestingly, the background production of IFN-γ for all influenza infected groups was greater than observed when similar analysis were carried out using purified polypeptide antigen. This observation, however, most likely reflects the inability of MMC treatment to fully inactivate the virus present in the cell preparation. This, in turn, would result in viable Influenza virus infecting susceptible mouse cells in the primary splenocyte cultures, thus leading to a primary response in vitro. This interpretation is sustained by the observation that most influenza virus strains used induced the same level of background IFN-γ response independently of the human cell line infected and the vaccinated group considered. The only exception to this rule is the much reduced background IFN-γ production observed in JURKAT cells infected with B/Johannesburg/5/99. However, as even in this case IFN-γ production for both FLU-v and NRP vaccinated animals is equivalent, it would appear that the observed difference is caused more by the reduced susceptibility of JURKAT cells to infection by Influenza B/Johannesburg/5/99, than by any cause intrinsically associated to the different vaccination regimes. Whatever the case, this observation, does not detract from the clear fact that vaccination with FLU-v leads to the specific recognition of naturally processed influenza epitopes presented in association with HLA-A*0201 molecules following infection of human cells with several non-related strains of infectious influenza virus. Therefore, FLU-v constitutes an effective candidate vaccine preparation for protection against multiple influenza strains, thus obviating the need for the current yearly re-vaccination protocols.

Experiment 2

Protective Effect of Polypeptides in Mice

[0130] The purpose of this study was to demonstrate that low dose immunisation with the identified Influenza conserved T cell polyepitope peptides (FLU-v) induces protection, mediated by CD8.sup.+ T cells, against lethal challenge with the influenza virus.

Materials and Methods

Peptides, Antisera and Virus:

[0131] The candidate vaccine preparation (FLU-v) tested in this study is composed of several peptides (i.e. P1: MIA amino acid (aa) 36 to 75 (SEQ ID 1); P2: M1B aa 124 to 158 (SEQ ID 2); P3: NPA aa 255 to 275 (SEQ ID 3); P4: NPB aa 306 to 326 (SEQ ID 4); P5: PB1 aa 395 to 428 (SEQ ID 5); P6: M2 aa 32 to 55 (SEQ ID 6)) which were all synthesised by Fmoc chemistry and resuspended in DMSO in PBS (the concentration of DMSO in the final preparation was less than 5%). Lysozyme (Sigma) denatured by boiling was used as the control non relevant preparation (NRP-v).

[0132] Purified rat anti-mouse CD8 IgG2a (clone YTS169.4) was obtained from AbD Serotec (UK) whilst the infectious virus Influenza A/PR/8/34 were obtained from NIBSC as lyophilised standard stock.

Immunizations

[0133] On day 1, seven to ten week old C57BL/6-Tg(HLA-A2.1)1Enge/J mice (HLA-A*0201 transgenic on a C57/BL6 background, Jackson Labs) were immunised subcutaneously at the base of the tail with a 200 μl dose of the antigen preparation emulsified in IFA (Sigma). In the test group (n=14), each dose of the antigen preparation contained 60 nmol of an equimolar mixture of all six peptides (10 nmol each) whilst in the control group (n=14), each dose of the antigen preparation contained an equivalent dose of the non-relevant polypeptide.

[0134] On day 15 all animals received a booster immunisation using the same doses and route of delivery as used originally.

[0135] On Day 16 both the test and control groups were split into two equal subgroups (n=7 each; i.e. Ctrol-1, Ctrol-2, Test-1 and Test-2).

[0136] On Day 19, all animals in the Ctrol-1 and Test-1 groups received a 200 μl intraperitoneal injection of rat anti-mouse-CD8 sera (100 μg) whilst all animals in the Ctrol-2 and Test-2 groups received an equivalent injection of unrelated sera.

[0137] The following day (Day 20), all groups were challenged intranasally under anaesthesia with a large lethal dose (approximately 1.5×10.sup.7 pfu) of Influenza A/PR/8/34.

[0138] On day 22, animals were again intraperitoneally injected with either rat anti-mouse-CD8 or unrelated sera as described above.

[0139] From day 20 all animals were monitored daily for symptoms of influenza (e.g. sneezing and pyrexia) as well as weight loss.

[0140] All animals still alive on day 27 were culled and the study was terminated.

Results

[0141] In order to assess the efficacy of the FLU-v preparation as a candidate Influenza vaccine it was desirable to set up a challenge study in NRP-v and FLU-v immunised animals using the Influenza A/PR/8/34 strain. Typically, an intranasal dose of approximately 1.5×10.sup.7 pfu will kill non-immunised C57BL/6-Tg(HLA-A2.1)1Enge/J mice on day 4 or 5 after challenge (data not shown).

[0142] As shown in FIG. 3A, most animals immunised with either the FLU-v or NRP-v peptide preparations, but subject to CD8 depletion, had succumbed to infection by Influenza A/PR/8/34 by day 7 after intranasal challenge (71% vs 100% respectively). In contrast, as shown in FIG. 3B and in the absence of CD8 depletion, animals immunised with the FLU-v preparation showed a significant reduction (p<0.05) in their mortality rate compared to animals immunised with the NRP-v preparation (28% vs 100%).

[0143] The results of this study clearly indicate that vaccination with the FLU-v peptide preparation, even at a low level dose of each of its constituent active peptides (10 nmol), induces a significant level of protection against lethal challenge with Influenza. These peptides, as indicated earlier, where identified in silico primarily by their T cell reactivity within the context of Human HLA Class I. The results corroborate the fact that CD8.sup.+ T cells stimulated by vaccination with the FLU-v peptide preparation play a significant role in conferring protection against Influenza infection.