Leukocytes adhere to the blood vessel endothelium during extravasation in postcapillary venules of lymph nodes. In addition, leukocyte adhesion occurs in the capillaries and small venules at any site in the body after onset of inflammation. This response is immediate and involves a cascade of adhesion receptors. At the endothelial surface members of the selectin and immunoglobulin superfamilies participate in this cascade. Selectins are C-type cell surface lectins that play a role in leukocyte adhesion to the blood vessel wall endothelium. E-selectin (CD62E) is an endothelial cell specific selectin that is expressed only after activation with proinflammatory cytokines. In vitro experiments have shown that IL-1, TNFalpha and bacterial wall components like lipopolysaccharides induce the transcription of E-selectin in a NFkB dependent signaling cascade. E-selectin (CD62E) has been associated with blood vessel endothelium in diverse inflammatory situations. (Shipping Cost: €200.00)

CD45RA [4KB5]

CD45 or Leukocyte Common Antigen (LCA/T200) belongs to a family of membrane sialoglycoproteins with MW of 180kDa-220kDa. Human CD45 contains three exons which encode peptidesegments designated A, B and C, respectively. The differential splicing of the exons generates various isoforms. CD45RA.is a single chain glycoprotein. It is expressed on appoximately 40-50% of peripheral CD4+ T-cells, 50% of peripheral CD8+ T-cells, B-cells, and leukemic B-cell lines. T-cells expressing CD45RA and CD45RO define complementary, predominantly non-overlapping populations of resting peripheral T-cells. CD45RA are naive orvirgin T-cells while, T-cells expressing CD45RO are memory T-cells.

CD45RA [4KB5]