Adaptive immune response involving activated lymphocytes requires the engagement of T-cell receptors by antigenic peptide-MHC complexes (APC). B7 family members are involved in the regulation of T-cell activation by APCs. V-set and immunoglobulin domain containing 4 (VSIG4, Z39IG), a B7 family-related protein, has been identified as a negative regulator of T-cell activation. VSIG4 may play a role in inhibiting processes such as interstitial fibrosis.
Specificity
Anti-VSIG4 polyclonal antibody reacts with bovine, human, mouse, and rat V-set and immunoglobulin domain containing 4 proteins.
Immunogen
Synthetic peptide directed towards the N terminal region of human VSIG4
Application
Anti-VSIG4 polyclonal antibody is used to tag V-set and immunoglobulin domain containing 4 for detection and quantitation by Western blotting and in plasma by immunohistochemical (IHC) techniques. It is used as a probe to determine the roles of V-set and immunoglobulin domain containing 4 as a negative regulator of T-cell activation during adaptive immune response.
Biochem/physiol Actions
T cell activation by APCs is positively and negatively regulated by members of the B7 family. VSIG4 is a strong negative regulator of murine and human T cell proliferation and IL-2 production.
Sequence
Synthetic peptide located within the following region: VPGDVSLQLSTLEMDDRSHYTCEVTWQTPDGNQVVRDKITELRVQKLSVS
Physical form
Purified antibody supplied in 1x PBS buffer with 0.09% (w/v) sodium azide and 2% sucrose.
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