43 results about "CD1D" patented technology

Immunogenic compositions, cancer vaccines and methods for treating cancer are provided. Compositions comprising: (a) a glycan such as Globo H or an immunogenic fragment thereof, wherein the glycan is conjugated with a carrier protein by a linker such as para-nitrophenyl; and (b) an adjuvant comprising glycolipid capable of binding CD1d on a dendritic cell, such as an α-galactosyl-ceramide derivative, wherein the immunogenic composition induces an immune response that induces a higher relative level of IgG isotype antibodies as compared to IgM isotype antibodies, are provided. Immunogenic compositions comprising the carrier protein diphtheria toxin cross-reacting material 197 (DT-CRM197) and the adjuvant C34 are provided. Antibodies generated by immunogenic compositions disclosed herein further neutralize at least one of the antigens Globo H, stage-specific embryonic antigen-3 (SSEA-3) and stage-specific embryonic antigen-4 (SSEA-4). Therapeutics against breast cancer stem cells comprising immunogenic compositions comprising Globo H, SSEA-3 or SSEA-4 conjugated with DT-CRM197.

α-Galactosylceramides and glycosylceramides (“ceramide-like glycolipids”) that modulate NK T cells. The ceramide-like glycolipids vary in the cytokines induced in NK T cells and vary in the antigen-presenting cells that are capable of efficiently presenting the compounds to NK T cells. Pharmaceutical compositions of the ceramide-like glycolipids are provided, as are pharmaceutical compositions of the ceramide-like glycolipids combined with dendritic cells. Methods utilizing the ceramide-like glycolipids in vaccines, to activate NK T cells, to stimulate the immune system, and to treat mammals are also provided. The invention also provides methods of evaluating a compound for its ability to activate an NK T cell in the presence of a cell expressing a CD1d protein.

The invention is directed to a compound comprising one or more CD1d complexes in association with an antibody specific for a cell surface marker. The CD1d complexes comprise a CD1d, a β2-microglobulin molecule, and may further comprise an antigen bound to the CD1d binding groove. The invention is further directed to methods of inhibiting or stimulating an immune response with the CD1d-antibody compounds, in particular anti-tumor and autoimmunity responses.

The invention is directed to methods of modulating an immune response in an animal, comprising administering a composition comprising one or more soluble CD1d complexes, in particular non-specific soluble CD1d complexes. Soluble CD1d complexes comprise a soluble CD1d polypeptide, a β2-microglobulin polypeptide, and a ceramide-like glycolipid antigen bound to the CD1d antigen binding groove, and in certain embodiments, an immunogen. The administration of compositions of the present invention affects the activity of CD1d-restricted NKT cells, and in particular, allows for multiple administrations without causing CD1d-restricted NKT cell anergy.

The invention provides compounds and methods for the ex vivo or in vivo expansion of NK T cells, CD1d-reactive T cells, and JαQ+ T cells, and the modulation of their activities. These compounds and methods have diagnostic and therapeutic applications.

The present invention provides isolated antibodies or antigen binding portions thereof which bind to CD1d. These antibodies and antigen binding portions thereof have application in treatment of conditions involving NKT cell effector function.

A cell for immunotherapy of the present invention includes a nucleic acid encoding a Wilms tumor 1 gene product or a fragment of the Wilms tumor 1 gene product, wherein the nucleic acid including (i) a region encoding a fragment of the Wilms tumor 1 gene product, the fragment being indicated by positions 194 to 493 of amino acid sequence of SEQ ID NO:1 or by positions corresponding to the positions 194 to 493 of amino acid sequence corresponding to SEQ ID NO:1 and (ii) only one AUG as a functional start codon, connected to a 5′ terminal side of the region via 3m (m is 124-192) bases intervening between the AUG as the functional start codon and the 5′ terminal side of the region, and a nucleic acid encoding CD1d, wherein the cell has been loaded with a glycolipid recognized by antigen receptor of NKT cell.

The present invention relates to a phenotypically distinct CD1dhighCD5+ B cell subset that regulates T cell mediated inflammatory responses through the secretion of interleukin-10 (IL-10). The invention also relates to the use of these IL-10 producing regulatory B cells in the manipulation of immune and inflammatory responses, and in the treatment of disease. Therapeutic approaches involving adoptive transfer of these regulatory B cells, or expansion of their endogenous levels for controlling autoimmune or inflammatory diseases and conditions are described. Ablation of this subset of regulatory B cells, or inhibition of their IL-10 production can be used to upregulate immunodeficient conditions, and / or to treat tumors / cancer. Diagnostic applications also are encompassed.

Embodiments of the disclosure include methods and compositions for immunotherapy that comprise allogeneic cells that are able to be universally tolerated in host individuals. In specific embodiments the cells have reduced expression of endogenous beta2-microglobulin (B2M) and / or MHC class II-associated invariant chain (Ii), and in particular cases the cells are NKT cells that lack the ability to damage host tissues, have much reduced recognition by host immune cells, and surprisingly avoid destruction by host NK cells. In some embodiments, B2M- and / or Ii-targeting molecules are engineered to be expressed in combination (including within a single construct) with recombinantly engineered receptors, for example, for a one-hit generation of universally tolerated off-the-shelf immunotherapy.

Disclosed are methods for activating an NKT cell, methods of stimulating an immune response in a subject, methods of improving vaccine efficacy, and methods of treating an infection. Also disclosed are methods of promoting tumor rejection, treating cancer, modulating autoimmunity and inhibiting allergen-induced hypersensitivity in subjects. The methods include contacting an NKT cell with a bacterial glycolipid complexed with a CD1 molecule to activate the NKT cell. The bacterial glycolipid may be derived from a member of the Class Alphaproteobacteria.