Journal
JOURNAL OF CELL BIOLOGY
Volume 160, Issue 5, Pages 753-767Publisher
ROCKEFELLER UNIV PRESS
DOI: 10.1083/jcb.200212114
Keywords
motility; invasion; FAK; Src; JNK
Categories
Funding
- NCI NIH HHS [R37 CA050286, CA78045, CA45726, R01 CA045726, R01 CA050286, CA50286, CA75240, CA87038, R01 CA087038, R29 CA075240, P01 CA078045, R01 CA075240] Funding Source: Medline
- NHLBI NIH HHS [R01 HL054352, HL54352, R01 HL065754, HL65754] Funding Source: Medline
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C ell migration and invasion are fundamental components of tumor cell metastasis. Increased focal adhesion kinase (FAK) expression and tyrosine phosphor ation are connected with elevated tumorigenesis. Null mutation of FAK results in embryonic lethality, and FAK(-/-) fibroblasts exhibit cell migration defects in culture. Here we show that viral Src (v-Src) transformation of FAK(-/-) cells promotes integrin-stimulated motility equal to stable FAK reexpression. However, FAK(-/-) v-Src cells were not invasive, and FAK reexpression, Tyr-397 phosphorylation, and FAK kinase activity were required for the generation of an invasive cell phenotype. Cell invasion was linked to transient FAK accumulation at lamellipodia, formation of a FAK-Src-p130Cas-Dock180 signaling complex, elevated Rac and c-Jun NH2-terminal kinase activation, and increased matrix metalloproteinase expression and activity. Our studies support a dual role for FAK in promoting cell motility and invasion through the activation of distinct signaling pathways.
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