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Phosphorylation and nuclear translocation of integrin beta4 induced by a chemical small molecule contribute to apoptosis in vascular endothelial cells
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Phosphorylation and nuclear translocation of integrin beta4 induced by a chemical small molecule contribute to apoptosis in vascular endothelial cells
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Journal Article
Phosphorylation and nuclear translocation of integrin beta4 induced by a chemical small molecule contribute to apoptosis in vascular endothelial cells
2013
Overview
Integrin [beta]4 and its Y-1494 phosphorylation play an important role in cell signaling. We found a small molecule, ethyl1-(3-(4-chlorophenoxy)-2-hydroxypropyl)-3-(4-chlorophenyl)-1H-pyrazole-5-carboxylate (ECPC), that could elevate the levels of KIT ligand (KITLG), interleukin 8 (IL-8), prostaglandin-endoperoxide synthase 2 (PTGS2) and activating transcription factor 3 (ATF3) and promote apoptosis in vascular endothelial cells (VECs) through integrin [beta]4. We investigated the underlying mechanism of integrin [beta]4 participating in this process. ECPC treatment increased the phosphorylation of Y-1494 in the integrin [beta]4 cytoplasmic domain via a well-known receptor tyrosine kinase, fibroblast growth factor receptor 1 (FGFR1), and integrin [beta]4 translocated from the cytoplasm to nucleus. With suppression of Y-1494 phosphorylation by FGF-2 or siRNA of FGFR1, ECPC failed to promote integrin [beta]4 nuclear translocation and could not increase the expression of KITLG, IL-8, PTGS2 or ATF3. Y-1494 phosphorylation and nuclear translocation of integrin [beta]4 may be important during ECPC-induced apoptosis in VECs.[PUBLICATION ABSTRACT]
Publisher
Springer Nature B.V
Subject
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