The present invention relates to a cyclic peptide, a conjugate comprising said cyclic peptide and a lipopeptide building block, a bundle of said conjugates, a synthetic virus-like particle comprising at least one bundle of conjugates and pharmaceutical compositions comprising the same. The present invention further relates to said cyclic peptide, said conjugate said bundle of conjugates, said synthetic virus-like particle and said pharmaceutical compositions for use as a medicament, preferably for use in a method for preventing of an infectious disease or reducing the risk of an infectious disease, more preferably for use in a method for preventing or reducing the risk of an infectious disease associated with or caused by a respiratory syncytial virus.

The present invention relates to a cyclic peptide, a conjugate comprising said cyclic peptide and a lipopeptide building block, a bundle of said conjugates, a synthetic virus-like particle comprising at least one bundle of conjugates and pharmaceutical compositions comprising the same. The present invention further relates to said cyclic peptide, said conjugate said bundle of conjugates, said synthetic virus-like particle and said pharmaceutical compositions for use as a medicament, preferably for use in a method for preventing of an infectious disease or reducing the risk of an infectious disease, more preferably for use in a method for preventing or reducing the risk of an infectious disease associated with or caused by a respiratory syncytial virus.

In particular, the present invention relates to a cyclic peptide, wherein said cyclic peptide comprises an amino acid sequence (I), wherein said amino acid sequence (I) comprises the following amino acid sequence:

X1-X2-X3-C4-X5-X6-X7-C8-X9-X10-X11-P12-I13-T14-N15-D16-Q17-K18-K19-L20-C21-X22-X23-X24-C25-X26-X27-X28-X29-X30 (SEQ ID NO: 1), wherein

X1, X2, X3, X5, X6, X7, X9, X10, X11, X22, X23, X24, X26, X27, X28 and X29 are independently of each other an amino acid; C4, C8, C21 and C25 are independently of each other cysteine; P12 is proline; I13 is isoleucine; T14 is threonine; N15 is asparagine; D16 is aspartic acid; Q17 is glutamine; K18 and K19 are independently of each other lysine; L20 is leucine; and X30 is an amino acid or a deletion,

wherein said cysteines C4 and C25 form a first disulfide bond and said cysteines C8 and C21 form a second disulfide bond.

The present invention relates to compositions, immunogenic or vaccine compositions and pharmaceutical compositions for the prevention or treatment of canine atopic dermatitis (CAD). Furthermore, the invention provides methods for preventing or treating CAD. The compositions of the invention induce efficient immune responses, in particular antibody responses, in dogs and are, therefore, useful for the treatment and/or prevention of CAD.

The present invention relates to compositions, immunogenic or vaccine compositions and pharmaceutical compositions for the prevention or treatment of canine atopic dermatitis (CAD). Furthermore, the invention provides methods for preventing or treating CAD. The compositions of the invention induce efficient immune responses, in particular antibody responses, in dogs and are, therefore, useful for the treatment and/or prevention of CAD.

The present invention relates to a cyclic peptide, a conjugate comprising said cyclic peptide and a lipopeptide building block, a bundle of said conjugates, a synthetic virus-like particle comprising at least one bundle of conjugates and pharmaceutical compositions comprising the same. The present invention further relates to said cyclic peptide, said conjugate said bundle of conjugates, said synthetic virus-like particle and said pharmaceutical compositions for use as a medicament, preferably for use in a method for preventing of an infectious disease or reducing the risk of an infectious disease, more preferably for use in a method for preventing or reducing the risk of an infectious disease associated with or caused by a respiratory syncytial virus.

In particular, the present invention relates to a cyclic peptide, wherein said cyclic peptide comprises an amino acid sequence (1), wherein said amino acid sequence (I) comprises the following amino acid sequence: X1-X2-X3-C4-X5-X6-X7-C8-X9-X10-X11-P12-I13-T14-NIS-D16-Q17-K18-K19-L20-C21-X22-X23-X24-C25-X26-X27-X28-X29-X30 (SEQ ID NO: 1), wherein X1, X2, X3, X5, X6, X7, X9, X10, X11, X22, X23, X24, X26, X27, X28 and X29 are independently of each other an amino acid; C4, C8, C21 and C25 are independently of each other cysteine; P12 is proline; I13 is isoleucine; T14 is threonine; N15 is asparagine; D16 is aspartic acid; Q17 is glutamine; K18 and K19 are independently of each other lysine; L20 is leucine; and X30 is an amino acid or a deletion, wherein said cysteines C4 and C25 form a first disulfide bond and said cysteines C8 and C21 form a second disulfide bond.

The present invention provides a novel virus-like particle expression vector pTMSCA2C, which is constructed as follows: firstly, using plasmid pTrcHis-MS2 as a starting vector and mutating the base T at position 5 of the gene sequence of MS2 bacteriophage 19mer packaging site on the plasmid pTrcHis-MS2 into C through genetic mutation technologies to obtain a plasmid pTMSC; then, mutating valine which is a amino acid corresponding to the initiation codon on the plasmid pTMSC for encoding the maturase protein of MS2 bacteriophage into methionine to obtain a plasmid pTMSCA; and finally, the gene sequence coding wild type MS2 bacteriophage coat protein, after the removal of the terminator, is linked in series with the gene sequence coding MS2 bacteriophage coat protein comprising histidine-tag which is from a pseudovirus vector pTrcMS, and the gene sequence obtained after linking in series is linked to the plasmid pTMSCA to give pTMSCA2C. When the virus-like particle is prepared by using the expression vector pTMSCA2C of the present invention, the yield and purity of the virus-like particle may be improved while the workload for preparation of virus-like particles may be greatly reduced.

The present invention relates to a cyclic peptide, a conjugate comprising said cyclic peptide and a lipopeptide building block, a bundle of said conjugates, a synthetic virus-like particle comprising at least one bundle of conjugates and pharmaceutical compositions comprising the same. The present invention further relates to said cyclic peptide, said conjugate said bundle of conjugates, said synthetic virus-like particle and said pharmaceutical compositions for use as a medicament, preferably for use in a method for preventing of an infectious disease or reducing the risk of an infectious disease, more preferably for use in a method for preventing or reducing the risk of an infectious disease associated with or caused by a respiratory syncytial virus.