The present invention provides a vaccine formulation for use in the prevention and/or treatment of a cancer, comprising a complex of a hyaluronic acid derivative having an introduced hydrophobic group, and an antigen.

The present invention is directed to new compositions that are described for the simultaneous, controlled dose delivery of a variety of biomolecules into phagocytic cells. Such a composition is a biologically active composition comprising: (1) at least one of the following biologically active components: (a) a nucleic acid or a derivative thereof; (b) a nucleoside, nucleotide, or a derivative of a nucleoside or nucleotide; (c) a peptide, protein, or a derivative of a peptide or protein; (d) a lipopolysaccharide or a derivative thereof; (e) a peptidoglycan or a derivative thereof; (f) a carbohydrate or a derivative thereof; (g) a lipid or a derivative thereof; (h) a lipopeptide or a derivative thereof; (i) a metal ion; (j) a thiol; (k) an antibiotic or a derivative thereof; (I) a vitamin or a derivative thereof; (m) a bioflavonoid or a derivative thereof; (n) an antioxidant or a derivative thereof; (o) an immune response modifier; (p) an antibody; (q) a biologically active nonmetal; (r) histamine or an antihistamine; and (s) a kinase inhibitor; and (2) at least one carrier effective to deliver the composition to a phagocytic cell such that the biologically active component is taken up by the phagocytic cell and influences its biological activity.

Provided herein is an E. coli O polysaccharide, O25B. Also provided herein are prokaryotic host cells containing enzymes (e.g., glycosyltransferases) used in O25B production. The host cells provided herein produce O25B bioconjugates, wherein said bioconjugates contain O25B linked to a carrier protein. Further provided herein are compositions, e.g., pharmaceutical compositions, including O25B and/or bioconjugates containing O25B. Such compositions can be used as vaccines against infection with ExPEC, and may further include one or more additional bioconjugates.

The present invention belongs to the field of biological medicine, particularly to a novel tumor vaccine. In order to solve the problem in the art that no technical scheme is available for generating lasting and high-effective anti-tumor immune responses, the present invention provides a tumor vaccine mainly containing a complex as a main active ingredient, wherein the complex is formed by nucleic acid, especially replicable nucleic acid not expressing exogenous gene, and cationic biomaterial. The nucleic acid and the cationic biomaterial in the tumor vaccine according to the present invention have synergistic interactions on direct killing of tumor cells, and induction of the innate immune response and adaptive immune response of body against tumor. In addition, the prepared tumor vaccine has simple drug component and is easy to produce and maintain quality control. The tumor vaccine has a good prospect for application.

The present invention relates to virus-like particles of plant virus Cucumber Mosaic Virus (CMV), and in particular to modified VLPs of CMV comprising Th cell epitopes, in particular universal Th cell epitopes. Furthermore, these modified VLPs serve as, preferably, vaccine platform, for generating immune responses, in particular antibody responses, against antigens linked to said modified VLPs. The presence of the Th cell epitopes, in particular universal Th cell epitopes, led to a further increase in the generated immune response.

The present invention is directed towards conjugates comprising fragments of the capsular polysaccharide of Type III Group B Streptococcus (GBS). Suitable fragments may be produced synthetically or by depolymerisation of native polysaccharide.

This invention relates to the use of S. pneumoniae protein antigens, such as NanA, PiuA and Sp0148, as carriers for immunogenic S. pneumoniae capsular polysaccharide. This may be useful for example in glycoconjugate vaccines able to generate a protective immune response against multiple capsular serotypes. Glycoconjugates, vaccine compositions and methods of manufacture and use are provided.

A long-chain peptide antigen includes a plurality of epitopes. An interepitope sequence located between two of the plurality of epitopes contains four to ten consecutive tyrosines. The long-chain peptide antigen may be administered to a patient together with a hydrophobized polysaccharide, such as cholesterol-modified pullulan, and/or an adjuvant, such as CpG oligo DNA.

The present invention is in the field of conjugating native, non-detergent extracted, outer membrane vesicles (nOMV) to multiple antigens to form multi functionalized nOMV-antigen conjugated derivatives, which are particularly useful for immunogenic compositions and immunisation; processes for the preparation and use of such conjugates are also provided.

Disclosed is a method for improving the immunogenicity of a protein/peptide antigen, the method comprising conjugating a protein/peptide antigen with a sugar to form a sugar-protein/peptide antigen conjugate, which has improved immunogenicity compared to an unconjugated protein/peptide antigen. In particular, the method involves conjugating a pathogen, such as a viral surface protein antigen or a fragment thereof, with a polysaccharide, in particular a capsular polysaccharide of Streptococcus pneumonia. The conjugate with improved immunogenicity can be used to prevent or treat diseases caused by pathogens, in particular diseases caused by coronaviruses.