Preparation and Storage
Background: B7-H4
B7-H4, also known as B7x and B7S1, is an immune costimulatory protein that is expressed on the surface of activated lymphocytes, macrophages, monocytes, dendritic cells, epithelial cells, and bone marrow-derived mesenchymal stem cells. Its binding to activated T cells dampens T cell responses and induces cell cycle arrest in the T cell. Reverse signaling can induce either cell cycle arrest or apoptosis in the B7-H4 expressing cell. B7-H4 is upregulated in several carcinomas in correlation with tumor progression and metastasis. A soluble form of B7-H4 functions as a decoy molecule and is elevated in the serum of ovarian cancer, renal cell carcinoma, and rheumatoid arthritis patients.
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Long Name:
B7 Homolog 4
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Entrez Gene IDs:
79679 (Human); 242122 (Mouse)
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Alternate Names:
B7h.5; B7H4; B7-H4; B7H4T-cell costimulatory molecule B7x; B7S1; B7S1VCTN1; B7x; B7XPRO1291; FLJ22418; Immune costimulatory protein B7-H4; Protein B7S1; T cell costimulatory molecule B7x; V-set domain containing T cell activation inhibitor 1; V-set domain-containing T-cell activation inhibitor 1; Vtcn1