CD103 (Integrin alpha E) Monoclonal Antibody (B-Ly7), eBioscience™, Invitrogen™

Description

• Description: The B-Ly7 monoclonal antibody reacts with human CD103, the alpha E integrin
• CD103 non-covalently associates with integrin beta 7
• CD103 is expressed mainly on intraepithelial lymphocytes and a small subset of peripheral lymphocytes
• CD103 is also expressed by hairy cell leukemia (HCL) and by some chronic B cell lymphocytic leukemias
• In vitro stimulation of human T cells with mitogens induces upregulation of CD103
• Epithelial cell antigen, E-cadherin, binds to CD103 and mediates homing of lymphocytes to the intestinal epithelium
• Applications Reported: B-Ly7 has been reported for use in flow cytometric analysis, and immunohistochemical staining of frozen tissue sections
• Applications Tested: The B-Ly7 antibody has been tested by flow cytometric analysis of stimulated normal human peripheral blood cells
• This can be used at less than or equal to 0.5 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
• Aggregation: Less than 10%, as determined by HPLC
• Filtration: 0.2 μm post-manufacturing filtered
• CD103 (ITGAE, Integrin alpha E) is molecule that is expressed on mucosa-associated T lymphocytes and activated cells and on subet of TGF beta -1 cells
• In particular, CD103 includes a 150kDa alpha chain and a 120kDa beta chain
• CD103 is expressed by 0.5 to 2% of resting lymphocytes in peripheral blood and lymphoid organs
• CD103 antibody stains a few bone marrow cells and, rarely, peripheral blood lymphocytes
• CD103 is part of the integrin family which are heterodimeric integral membrane proteins composed of an alpha chain and a beta chain
• ITGAE encodes an I-domain-containing alpha integrin that undergoes post-translational cleavage in the extracellular domain, yielding disulfide-linked heavy and light chains
• In combination with the beta 7 integrin, CD103 protein forms the E-cadherin binding integrin known as the human mucosal lymphocyte-1 antigen
• CD103 is preferentially expressed in human intestinal intraepithelial lymphocytes (IEL), and in addition to a role in adhesion, it may serve as an accessory molecule for IEL activation
• Diseases associated with CD103 dysfunction include hairy cell leukemia and splenic marginal zone lymphoma.