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CD80 (B7-1) and CD86 (B7-2) are ligands of T cell critical costimulatory molecule CD28, and of an inhibitory receptor CTLA-4 (CD152). Both B7 molecules are expressed on professional antigen-presenting cells and are essential for T cell activation, and both molecules can also substitute for each other in this process. CD80 is rapidly induced on the surface of in vitro activated B cells, with Epstein Barr Virus (EBV) transformed B cell lines, with Burkitts lymphoma cell lines, with freshly isolated follicular B lymphoma cells, T cells, and monocytes. The B-lymphocyte activation antigen B7-1 provides regulatory signals for T lymphocytes as a consequence of binding to the CD28 and CTLA4 ligands of T cells. Diseases associated with CD80 dysfunction include gallbladder squamous cell carcinoma and myocarditis.
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Protein Aliases: Cd80 a rat homolog of the human CD28/CTLA - 4 ligand (B7-1); CD80 antigen; sCD 80; sCD80; soluble CD 80; soluble CD80; T-lymphocyte activation antigen CD80; TS/A-1
Gene Aliases: B7-1
Entrez Gene ID: (Rat) 25408
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