V-set domain-containing T-cell activation inhibitor 1 (VTCN1)

Negatively regulates T-cell-mediated immune response by inhibiting T-cell activation, proliferation, cytokine production and development of cytotoxicity. When expressed on the cell surface of tumor macrophages, plays an essential role, together with regulatory T-cells (Treg), in the suppression of tumor- related antigen-specific T-cell immunity.

Involved in promoting epithelial cell transformation. .