Ye Z, Zhong L, Zhu S, Wang Y, Zheng J, Wang S, Zhang J, Huang R. The P-selectin and PSGL-1 axis accelerates atherosclerosis via activation of dendritic cells by the TLR4 signaling pathway. Cell Death Dis. 2019; 10:507.
PSGL-1, a major selectin ligand on leukocytes, binds P-selectin, E-selectin, and L-selectin under flow conditions. PSGL-1 is a sialomucin of 120 kD that forms disulfide-linked (C320) homodimers. These have two subunits each contain two to three N-glycans, which are critical for P-selectin binding. Each subunit consists of an extracellular, transmembrane, and cytoplasmic domain. PSGL-1 is expressed on most peripheral T cells and on some B cells, neutrophils, monocytes, and platelets. PSGL-1 requires N-terminal tyrosine sulfation for high-affinity P-selectin binding. The PSGL-1 cytoplasmic domain binds ERM proteins, thereby linking PSGL-1 to the actin cytoskeleton. Recently, PSGL-1 has been shown to be of key importance for the delivery of tissue factor to sites of thrombosis. Blocking functional PSGL-1 reduces visceral adipose inflammation and ameliorates endothelial dysfunction in atherosclerosis.
1μg (R: reducing condition, N: non-reducing condition).
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