The antibody clone MEM-25 reacts with the alpha-subunit (CD11a) of human LFA-1, a 170-180 kDa type I transmembrane glycoprotein expressed on B and T lymphocytes, monocytes, macrophages, neutrophils, basophils and eosinophils.
Purification
Protein A chromatography
Immunogen
Leucocytes from a pacient suffering from a LGL-type leukaemia
ITGAL
Reactivity: Human
FACS
Host: Mouse
Monoclonal
MEM-25
PE
Application Notes
Flow Cytometry. Immunoprecipitation (excellent for immunoaffinity purification of LFA-1 complex)). Functional applications (MAb MEM-25 partially blocks binding of LFA-1 complex to ICAM-1). Other applications not tested. Optimal dilutions are dependent on conditions and should be determined by the user.
Store the antibody undiluted at 2-8 °C for one month or (in aliquots) at -20 °C for longer.
Wang, Kwas, Wu: "Intercellular adhesion molecule 1 (ICAM-1), but not ICAM-2 and -3, is important for dendritic cell-mediated human immunodeficiency virus type 1 transmission." in: Journal of virology, Vol. 83, Issue 9, pp. 4195-204, (2009) (PubMed).
Aubert, Yoon, Sloan, Spear, Jerome: "The virological synapse facilitates herpes simplex virus entry into T cells." in: Journal of virology, Vol. 83, Issue 12, pp. 6171-83, (2009) (PubMed).
CD11a together with CD18 constitute leukocyte function-associated antigen 1 (LFA-1), the alphaLbeta2 integrin. CD11a is implicated in activation of LFA-1 complex. LFA-1 is expressed on the plasma membrane of leukocytes in a low-affinity conformation. Cell stimulation by chemokines or other signals leads to induction the high-affinity conformation, which supports tight binding of LFA-1 to its ligands, the intercellular adhesion molecules ICAM-1, -2, -3. LFA-1 is thus involved in interaction of various immune cells and in their tissue-specific settlement, but participates also in control of cell differentiation and proliferation and of T-cell effector functions. Blocking of LFA-1 function by specific antibodies or small molecules has become an important therapeutic approach in treatment of multiple inflammatory diseases. For example, humanized anti-LFA-1 antibody Efalizumab (Raptiva) is being used to interfere with T cell migration to sites of inflammation, binding of cholesterol-lowering drug simvastatin to CD11a allosteric site leads to immunomodulation and increase in lymphocytic cholinergic activity.Synonyms: CD11 antigen-like family member A, Integrin alpha-L, LFA-1, LFA1, Leukocyte adhesion glycoprotein LFA-1 alpha chain, Leukocyte function-associated molecule 1 alpha chain