Anti-CD154 (human), clone 24-31, R-PE conjugated

Human CD154 (CD40 ligand) is a member of the TNF family and is expressed on the surface of activated T cells. Interaction of CD154 and CD40 is essential for isotype switching in B cells. Known genetic defects that alter this interaction lead to impaired immune system function. CD154 has been shown to be hyperexpressed by B and T cells in SLE patients. CD154 has been reported to be expressed on vascular endothelial cells, smooth muscle cells and macrophages indicating a possible role for the CD40-CD154 immunoregulatory signaling mechanism during inflammation and immunity in atherogenesis.