Endothelial cell adhesion molecules (ECAMs)

Endothelial cell adhesion molecules (ECAMs), often referred to as endothelial cell adhesive ligands, are a diverse group of cell surface proteins expressed by vascular endothelial cells that mediate the interaction between the vessel wall and circulating blood cells. These molecules, which include selectins (E-selectin, P-selectin) and members of the immunoglobulin superfamily (ICAM-1, VCAM-1), are critical for the multi-step process of leukocyte recruitment, including rolling, adhesion, and transmigration into tissues. In healthy individuals, their expression is low, but it is rapidly upregulated in response to inflammatory stimuli such as cytokines and oxidative stress. Pathological overexpression of these ligands is a hallmark of various conditions, including chronic inflammatory diseases, atherosclerosis, and the vaso-occlusive crises seen in sickle cell disease. Consequently, they are important therapeutic targets; for instance, crizanlizumab is an FDA-approved antibody targeting P-selectin to reduce pain crises in sickle cell patients, while other agents like uproleselan are being investigated for their ability to disrupt the protective niche of leukemic cells in the bone marrow.

Other names

Endothelial cell adhesive ligandsEndothelial cell adhesion moleculesECAMsVascular adhesion moleculeseCAMsCell adhesion molecules (CAMs)

Selectin antagonism, ICAM-1 inhibition, VCAM-1 inhibition, Inhibition of leukocyte-endothelial adhesion