TCR V alpha 24 J alpha 18 Monoclonal Antibody (6B11), FITC, eBioscience™, Invitrogen™

Description

• Description: The 6B11 monoclonal antibody reacts with an epitope of the CDR3 formed by the germ-line configuration of the V alpha 24 and J alpha 18 of the TCR alpha locus, which results in the expression of an invariant T-cell receptor (TCR) expressed by invariant NK T cells (iNKT)
• This TCR is homologous to the murine V alpha 14J alpha 18
• This TCR alpha chain pairs with a restricted set of rearranged TCR beta chains, with V beta 11 being the most prominent in humans
• NK T cells are restricted by the CD1d molecule and are activated by a CD1d-presented glycolipid ligand, which results in the rapid production of IL-4, IL-13 and IFN gamma
• Although iNKT cells have NK-like cytolytic activity, they are considered regulators of immune responses because they rapidly produce large amounts of both Th1 and Th2 cytokines in autoimmune disease, infectious disease, and cancer
• The number of iNKT cells present in peripheral blood of normal humans shows considerable variability ranging from 0.01-1% of total peripheral T cells
• Applications Reported: This 6B11 antibody has been reported for use in flow cytometric analysis
• Applications Tested: This 6B11 antibody has been pre-titrated and tested by flow cytometric analysis of normal human peripheral blood cells
• This can be used at 5 μL (0.25 μg) per test
• A test is defined as the amount (μg) of antibody that will stain a cell sample in a final volume of 100 μL
• The ability of T cell receptors (TCR) to discriminate foreign from self-peptides presented by major histocompatibility complex (MHC) class II molecules is essential for an effective adaptive immune response
• TCR recognition of self-peptides has been linked to autoimmune disease
• Mutant self-peptides have been associated with tumors
• Engagement of TCRs by a family of bacterial toxins know as superantigens has been responsible for toxic shock syndrome
• Autoantibodies to V beta segments of T cell receptors have been isolated from patients with rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE)
• The autoantibodies block TH1-mediated inflammatory autodestructive reactions and are believed to be a method by which the immune system compensates for disease
• Most human T cells express the TCR alpha-beta and either CD4 or CD8 molecule (single positive, SP)
• A small number of T cells lack both CD4 and CD8 (double negative, DN)
• Increased percentages of alpha-beta DN T cells have been identified in some autoimmune and immunodeficiency disorders
• Gamma-delta T cells are primarily found within the epithelium
• They show less TCR diversity and recognize antigens differently than alpha-beta T cells
• Subsets of gamma-delta T cells have shown antitumor and immunoregulatory activity.