CDB25:0004447 VWF — ITGAV

Experimentally validated in Human; Orthology-inferred in Mouse, Rat, Frog, Zebrafish, Chicken, Macaque, Pig, Dog, Cow, Chimp, Horse, Marmoset, Sheep

Title

Journal:; Year Published:

Abstract

Integrin alpha(v)beta(3) on human endothelial cells binds von Willebrand factor strings under fluid shear stress.

Blood, 2009; PubMed, Homo sapiens VWF — Homo sapiens ITGAV
ABSTRACT: Acutely secreted von Willebrand factor (VWF) multimers adhere to endothelial cells, support platelet adhesion, and may induce microvascular thrombosis. Immunofluorescence microscopy of live human umbilical vein endothelial cells showed that VWF multimers rapidly formed strings several hundred micrometers long on the cell surface after stimulation with histamine. Unexpectedly, only a subset of VWF strings supported platelet binding, which depended on platelet glycoprotein Ib. Electron microscopy showed that VWF strings often consisted of bundles and networks of VWF multimers, and each string was tethered to the cell surface by a limited number of sites. Several approaches implicated P-selectin and integrin alpha(v)beta(3) in anchoring VWF strings. An RGDS peptide or a function-blocking antibody to integrin alpha(v)beta(3) reduced the number of VWF strings formed. In addition, integrin alpha(v) decorated the VWF strings by immunofluorescence microscopy. Furthermore, lentiviral transduction of shRNA against the alpha(v) subunit reduced the expression of cell-surface integrin alpha(v)beta(3) and impaired the ability of endothelial cells to retain VWF strings. Soluble P-selectin reduced the number of platelet-decorated VWF strings in the absence of Ca(2+) and Mg(2+) but had no effect in the presence of these cations. These results indicate that VWF strings bind specifically to integrin alpha(v)beta(3) on human endothelial cells.
Basic Information on VWF
Ligand Name: von Willebrand factor
Other Symbols: F8VWF
Ligand Location: secreted based on perplexity, uniprot
HGNC Gene Symbol Report: VWF
GeneCards: VWF
HGNC Gene Group: Receptor ligands
Basic Information on ITGAV
Receptor Name: integrin subunit alpha V
Other Symbols: VNRA, MSK8, VTNR, CD51
Receptor Location: cell membrane based on perplexity, uniprot
HGNC Gene Symbol Report: ITGAV
GeneCards: ITGAV
HGNC Gene Group: CD molecules, Integrins