This antibody specifically detects CD11a positive leucocytes. CD11a antigens are expressed on lymphocytes, granulocytes, monocytes and macrophages with increased levels on memory T cells (1,2). Clone DF1524 was clustered at the Leucovyte Typing Workshop IV (5).
CD11a/CD18 was first described as an accessory molecule in cytotoxic lymphocyte killing. CD11a (Integrin alpha-L) combines with CD18 (Integrin beta-2) to form the integrin LFA-1. LFA-1 mediates adhesion of lymphoid cells to the vascular endothelium in association with its ligands. The avidity of CD11a to its ligands is transiently upregulated on T cells upon activation (3). CD11a has also been shown to bind bacterial lipopolysaccarides (4).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