CD279 (PD-1) Monoclonal Antibody (MIH4), eBioscience™, Invitrogen™

Description

• Description: The MIH4 monoclonal antibody reacts with the human PD-1 (programmed death-1), a 55 kDa member of the immunoglobulin superfamily
• PD-1 contains the immunoreceptor tyrosine-based inhibitory motif (ITIM) and plays a key role in peripheral tolerance and autoimmune disease
• PD-1 is expressed predomitly on activated T and B lymphocytes
• Two novel members of the B7 family have been identified as the PD-1 ligands, PD-L1 (B7-H1) and PD-L2 (B7-DC)
• Evidence reported to date suggests overlapping functions for these two PD-1 ligands and their constitutive expression on some normal tissues and upregulation on activated antigen-presenting cells
• The MIH4 antibody recognizes a different epitope than antibody clones J105
• Applications Reported: This MIH4 antibody has been reported for use in flow cytometric analysis, and immunohistology staining of frozen tissue sections
• Applications Tested: This MIH4 antibody has been tested by flow cytometric analysis of PHA-stimulated peripheral blood mononuclear cells
• This can be used at less than or equal to 1 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
• Cell number should be determined empirically but can range from 10^5 to 10^8 cells/test
• It is recommended that the antibody be carefully titrated for optimal performance in the assay of interest
• Purity: Greater than 90%, as determined by SDS-PAGE
• Cell-mediated immune responses are initiated by T lymphocytes that are themselves stimulated by cognate peptides bound to MHC molecules on antig en-presenting cells (APC)
• T-cell activation is generally self-limited as activated T cells express receptors such as PD-1 (also known as PDCD-1) that mediate inhibitory signals from the APC
• PD-1 can bind two different but related ligands, PDL-1 and PDL-2
• Upon binding to either of these ligands, signals generated by PD-1 inhibit the activation of the immune response in the absence of &quotedanger signals&quote such as LPS or other molecules associated with bacteria or other pathogens
• Evidence for this is seen in PD1-null mice who exhibit hyperactivated immune systems and autoimmune diseases
• Despite its predicted molecular weight, PD-1 often migrates at higher molecular weight in SDS-PAGE.