The present invention relates to a synthetic saccharide of general formulate (I) that is related to Clostridium difficile PS-II cell-surface polysaccharide and conjugate thereof. Said synthetic saccharide, said conjugate and pharmaceutical composition containing said synthetic saccharide or said conjugate are useful for prevention and/or treatment of diseases associated with Clostridium difficile. Furthermore, the synthetic saccharide of general formula (I) is useful as marker in immunological assays for detection of antibodies against Clostridium difficile bacteria.

The present invention refers to new glycoconjugate antigens expressing built-in multiple epitopes and to polyvalent glycoconjugate vaccines intended for the protection of mammalians, and particularly for the protection of the human population from enteropathogenic bacteria, such as the Gram-positive anaerobic bacterium Clostridium difficile and the Gram-negative bacteria Salmonella typhi, Escherichia Coli, Vibrio Cholerae, Shigella flexneri, Salmonella typhimurium, Salmonella enteritidis, Salmonella paratyphi A, Shigella sonnei, Shigella dysenteriae, Salmonella cholerasuis, Klebsiella, Enterobacter, Pseudomonas aeruginosa and/or from viral gastrointestinal infections due to human noroviruses.

Provided herein are vaccine composition comprising an antigen conjugated to a capsid, wherein the capsid comprises wild type or native sequence. Provided herein are also vaccine composition comprising an antigen conjugated to a capsid, wherein said capsid comprises at least one mutation, such as a non-natural mutation. Such compositions are useful in the treatment and prevention of pathogenic infections, inflammatory diseases, and neurodegenerative disease, and cancer, among others.

Compositions, methods, assays, and kits providing or incorporating derivatives of mitragynine, particularly as haptens and immunogens.

Use of a CXCR4 antagonistic peptide and an immune-check point regulator in the treatment of cancer is provided. Accordingly there is provided a method of treating cancer in a subject in need thereof, the method comprising administering to the subject a therapeutically effective amount of a peptide having an amino acid sequence as set forth in SEQ ID NO: 1 or an analog or derivative thereof; and a therapeutically effective amount of a PD1 antagonist, a PDL-1 antagonist, a CTLA-4 antagonist, a LAG-3 antagonist, a TIM-3 antagonist, a KIR antagonist, an IDO antagonist, an OX40 agonist, a CD137 agonist, a CD27 agonist, a CD40 agonist, a GITR agonist, a CD28 agonist or an ICOS agonist, thereby treating the cancer in the subject. Also provided are pharmaceutical compositions and articles of manufacture.

The present disclosure provides compositions comprising an isolated polysaccharide comprising β-1,4 linked galactosamine and glucosamine monomers, wherein the amino groups of each of the galactosamine and glucosamine are partially substituted with acetate. The disclosure further provides vaccine, methods of use, and methods of producing the isolated polysaccharide.

Methods for inducing an immune response against tau protein in a subject suffering from a neurodegenerative disease, disorder or condition, such as Alzheimer's Disease, are described. The methods include administering a liposomal priming composition containing tau peptides, preferably phosphorylated tau peptides, and a conjugate boosting composition containing tau peptides, preferably phosphorylated tau peptides, conjugated to an immunogenic carrier.

The present disclosure provides modified bacteria and modified peptidoglycan comprising modified D-amino acids; compositions comprising the modified bacteria or peptidoglycan; and methods of using the modified bacteria or peptidoglycan. The modified D-amino acids include a bioorthogonal functional group such as an azide, an alkyne or a norbornene group. Also provided are modified peptidoglycans conjugated to a molecule of interest via a linker.

In one aspect, the invention relates to a composition including a first polypeptide having the sequence set forth in SEQ ID NO: 1 and a second polypeptide having the sequence set forth in SEQ ID NO: 2. In one embodiment, the composition includes about 120 μg/ml of a first polypeptide including the amino acid sequence set forth in SEQ ID NO: 1, 120 μg/ml of a second polypeptide including the amino acid sequence set forth in SEQ ID NO: 2, about 2.8 molar ratio polysorbate-80 to the first polypeptide, about 2.8 molar ratio polysorbate-80 to the second polypeptide, about 0.5 mg/ml aluminum, about 10 mM histidine, and about 150 mM sodium chloride. In one embodiment, a dose of the composition is about 0.5 ml in total volume. In one embodiment, two-doses of the composition induce a bactericidal titer against diverse heterologous subfamily A and subfamily B strains in a human.

Disclosed are methods of treating cancer of the intraperitoneal cavity using compositions comprising nanoparticles without targeting agents. In addition, nanoparticles are described that comprise a highly toxic anticancer agent (e.g., an anticancer agent having an IC.sub.50 less than 1 nM) covalently bound via a linker to a triblock copolymer. Other nanoparticles that comprise Pt(IV) and an anticancer agent are also described. Also disclosed are nanoparticles comprising imaging agents non-covalently associated with a polymer, and methods of imaging cancer of the intraperitoneal cavity using compositions comprising nanoparticles without targeting agents.