Immunogenic compositions comprising (a) a bacterial population comprising at least three pathogenic bacterial species selected from the group consisting of Staphylococcus aureus, Streptococcus pyogenes, Streptococcus pneumoniae, Haemophilus influenzae, Klebsiella pneumoniae, and Moraxella catarrhalis, wherein the bacteria are inactivated bacteria comprising the whole bacterial cell wall, and (b) one or more tumor antigenic determinants. Pharmaceutical compositions comprising the immunogenic compositions and methods for preventing and/or treating tumors in subjects in need thereof.

Disclosed herein are fusion polypeptides comprising: (i) a fragment antigen comprising an epitope of a target protein antigen; and (ii) a complement binding polypeptide. The disclosure also provides fusion polynucleotides (e.g., mRNA) encoding the same. Also disclosed herein are methods of making and using the fusion polypeptides and fusion polynucleotides of the present disclosure.

Outer membrane vesicles from bacteria of the Burkholderia pseudomallei complex can be used as adjuvants in compositions and methods to potentiate the immune response to immunogens.

Provided are compositions and methods that relate to Inflammasome Agonist Proteins (IAPS) that are used to stimulate immune responses. IAPS are used with Toll-Like Receptor (TLR) ligands, antigens, cell surface binding proteins, and binding partners that direct to IAPs or fusion proteins containing the IAP to a particular target. The IAP constructs can be used directly to stimulate immune responses, or in conjunction with other components such as antigens, whereby the IAPs function as adjuvants.

The present invention is directed to a bioconjugate vaccine, such as an O 1-bioconjugate vaccine, comprising: a protein carrier comprising a protein carrier containing at least one consensus sequence, DIE-X-N-Z-S/T, wherein X and Z may be any natural amino acid except proline; at least one antigenic polysaccharide from at least one pathogenic bacterium, linked to the protein carrier; and, optionally, an adjuvant. In another aspect, the present invention is directed to a method of producing an O 1-bioconjugate in a bioreactor comprising a number steps.

The disclosure relates to a glycoconjugate vaccine conferring protection against Francisella tularensis infections and a method to manufacture a glycoconjugate antigen.

Provided herein are Haemophilus influenzae saccharide-carrier conjugates and compositions thereof. Also provided are methods of making and using the conjugates and compositions thereof, and kits containing the conjugates. Haemophilus influenzae saccharide-lipid conjugates, Haemophilus influenzae saccharide-glycosphingolipid conjugates, compositions containing these, methods of making and using the conjugates and compositions, and kits containing these, are also disclosed. Saccharide-lipid conjugates, and saccharide-glycosphingolipid conjugates comprising saccharides from Haemophilus influenzae serotype a, as well as compositions containing these, methods of making and using the conjugates and compositions, and kits containing these, are also disclosed.

Methods for the production of immunogenic compositions containing a non-natural amino acid are disclosed. The non-natural amino acid can be a site for attachment of antigens, such as bacterial capsular polysaccharides, to make immunogenic conjugates. Bio-orthogonal attachment chemistry incorporated into the non-natural amino acids allows for more efficient and potent antigen presentation to the immune system, simplified purification, and more well-defined structure of these semi-synthetic immunogens.

The invention relates to a molecular complex for targeting the antigen towards cells comprising antigens, including at least one antigen associated with at least two ligands of surface molecules of cells comprising antigens, said complex including at least one first ligand of a sulphated sugar of the glycosaminoglycan family and a second ligand of a specific surface molecule of cells comprising antigens, and said first ligand being covalently bonded with said antigen and/or said second ligand.

A vaccine adjuvant and immunogenic composition may be described herein. The vaccine adjuvant may comprise cell wall fragments of the genus Mycobacterium, and more particularly, of M. avium. The immunogenic composition may include the vaccine adjuvant conjugated to an antigen. For example, cell wall fragments of M. avium (herein also referred to as MAF) may be conjugated to an antigen targeting Gonadotropin releasing hormone (GnRH). The MAF-antigen conjugate may be delivered for the purposes of treatment through one of several methods, including intramuscular injection, naso-pharyngeal, or oral.