The present invention relates to new glycoconjugates comprising Streptococcus pneumoniae capsular saccharide antigens and uses thereof. Glycoconjugates of the present invention will typically comprise 2 or more saccharides antigens conjugated to the same molecule of the protein carrier. The invention also relates to vaccination of human subjects, in particular infants and elderly, against pneumoccocal infections using immunogenic compositions comprising said novel glycoconjugates.

The present disclosure relates in some aspects to immunogenic compositions including recombinant peptides and proteins comprising coronavirus viral antigens and immunogens, e.g., coronavirus S protein peptides. In some aspects, the immunogenic composition comprises a secreted fusion protein comprising a soluble coronavirus viral antigen joined by in-frame fusion to a C-terminal portion of a collagen which is capable of self-trimerization to form a disulfide bond-linked trimeric fusion protein. In some aspects, the immunogenic compositions provided herein are useful for generating an immune response, e.g., for treating or preventing a coronavirus infection. In some aspects, the immunogenic compositions provided herein may be used in a vaccine composition, e.g., as part of a prophylactic and/or therapeutic vaccine. Also provided herein are methods for producing the recombinant peptides and proteins, prophylactic, therapeutic, and/or diagnostic methods, and related kits.

The present disclosure relates to compositions and methods for coupling an antigen to an adjuvant, immunogenic compositions and vaccines. The methods of the invention can be used to increase an immune response, or to treat cancer or an infectious disease.

Embodiments of immunogenic conjugates including the HIV-1 Env fusion peptide and methods of their use and production are disclosed. In several embodiments, the immunogenic conjugates can be used to generate an immune response to HIV-1 Env in a subject, for example, to treat or prevent an HIV-1 infection in the subject.

Provided are polypeptides and compositions comprising novel HSP-binding peptides. Such polypeptides and compositions are particularly useful as immunotherapeutics (e.g., cancer vaccines). Also provided are methods of inducing a cellular immune response using such polypeptides and compositions, methods of treating a disease using such polypeptides and compositions, kits comprising such polypeptides and compositions, and methods of making such compositions.

The present invention relates to microvesicles derived from natural tumor cells and tumor cells produced in vitro under a stress stimulus, such as radiation, which can be used in an effective manner as a therapeutic vaccine for cancer. The invention also relates to a therapeutic vaccine formulation containing the microvesicles, processes for the preparation and medical use thereof as a therapeutic vaccine to stimulate the antitumor immune system and treat cancer.

The present invention provides, in some embodiments, methods, compositions, systems, and kits comprising nano-satellite complexes comprising: a core nanoparticle complex comprising a biocompatible coating surrounding a nanoparticle core; 3-25 satellite particles attached to, or absorbed to, said biocompatible coating; a plurality of antigenic peptides conjugated to, or absorbed to, said satellite particles; and at least one additional property. In other embodiments, provided herein are nano-satellite complexes comprising: a core nanoparticle complex comprising a biocompatible coating surrounding a nanoparticle core; a plurality of satellite particles attached to, or absorbed to, said biocompatible coating; a plurality of antigenic peptides conjugated to, or absorbed to, said satellite particles; and a plurality of LIGHT (TNFSF14) peptides conjugated to, or absorbed to, said satellite particles. In some embodiments, administration of the nanosatellite complexes to a subject with cancer achieves long-term cancer remission (e.g., when combined with an immune checkpoint inhibitor, such as αPD1).

Disclosed herein are compositions and methods for the treatment of hepatitis B infection, including chronic hepatitis B (CHB).

The present invention provides a conjugate comprising: i) at least one first specific binding molecule which binds CD40, wherein said first specific binding molecule is an agonist of CD40; and ii) at least one second specific binding molecule which binds a tag moiety, wherein said tag moiety is not a cancer antigen, wherein said first specific binding molecule and second specific binding molecule are antigen-binding proteins comprising an antigen-binding domain of an antibody and are covalently linked. The conjugate can be combined with a tag construct comprising: i) a tag moiety which is not a cancer antigen; and ii) an antigen, being a cancer antigen or an antigen derived from a pathogen; wherein said antigen is a polypeptide and said tag moiety is covalently linked to said antigen, for use in therapy, to stimulate an immune response by a subject against the antigen in question.

Compositions containing a nucleic acid nanostructure having a desired geometric shape and immunostimulatory agent(s) bound to its surface are provided. The nanostructures can be, for example, in the form of a 6-helix bundle, or icosahedron, or a pentagonal bipyramid. The nanostructure design allows for control of the relative position and/or stoichiometry of the immunostimulatory agent(s) bound to its surface. The immunostimulatory agent(s) displayed on the nanostructure surface are arranged with the preferred number, spacing, and 3D organization to elicit a robust immune response. The displayed antigen can be a TLR agonist, such as a TLR9 agonist. The immunostimulatory compositions may thus be useful as immunogens, vaccines, adjuvants, and the like. Methods of inducing immune responses, and for targeted induction of TLR activation are also provided.