Abstract:
:Focal adhesion kinase (FAK) is a structurally unique nonreceptor protein-tyrosine kinase that localizes to focal adhesion plaques. Regulation of its activity has been implicated in diverse signaling pathways, including those mediated by extracellular matrix/integrin interactions, G-protein coupled receptors for mitogenic neuropeptides, and certain oncogene products. To gain evidence for specific processes in which FAK may be involved in vivo, a study was initiated to determine its expression pattern during mouse development. FAK expression was detected in early embryos and appeared to be distributed throughout all cell types at about the time of neurulation. Subsequent to neural tube closure, expression became particularly abundant in the developing vasculature. This included expression in the medial layer of arteries populated by smooth muscle cells. In vitro studies using cultured rat aortic vascular smooth muscle cells demonstrate that FAK phosphotyrosine content is dramatically elevated in response to plating cells onto the adhesive glycoprotein, fibronectin. Also, enhanced tyrosine phosphorylation of FAK is observed in these cells upon stimulation with the vasoconstrictor angiotensin II. Thus, in vascular smooth muscle cells, like fibroblasts, FAK appears to play a role in signaling mechanisms induced by extracellular matrix components as well as G-protein coupled receptor agonists. The combined results of this study suggest that signaling through FAK may play an important role in blood vessel morphogenesis and function.
journal_name
J Cell Biochemjournal_title
Journal of cellular biochemistryauthors
Polte TR,Naftilan AJ,Hanks SKdoi
10.1002/jcb.240550113subject
Has Abstractpub_date
1994-05-01 00:00:00pages
106-19issue
1eissn
0730-2312issn
1097-4644journal_volume
55pub_type
杂志文章abstract::The MDMX gene product is related to the MDM2 oncoprotein, both of which interact with the p53 tumor suppressor. A novel transcript of the MDMX gene has been previously identified that has a short internal deletion of 68 base pairs, producing a shift in the reading frame after codon 114, resulting in the inclusion of 1...
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更新日期:2011-12-01 00:00:00
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