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- Title
GRIM-19 inhibits v-Src-induced cell motility by interfering with cytoskeletal restructuring.
- Authors
Sun, P.; Nallar, S. C.; Kalakonda, S.; Lindner, D. J.; Martin, S. S.; Kalvakolanu, D. V.
- Abstract
GRIM-19 (Gene associated with Retinoid-Interferon-induced Mortality 19) is a novel tumor suppressor regulated by interferon/retinoid combination. We have recently shown that GRIM-19 inhibits v-Src-induced oncogenic transformation and metastatic behavior of cells. Oncogenic v-Src induces cell motility by cytoskeletal remodeling, especially the formation of podosomes and. Here, we show that GRIM-19 inhibited the v-Src-induced cell motility by inhibiting cytoskeletal remodeling, that is, podosome formation. We also show that the N terminus of GRIM-19 played a major role in this process and identified critical residues in this region. More importantly, we show that tumor-associated GRIM-19 mutations disrupted its ability to inhibit v-Src-induced cell motility. These actions appear to occur independently of STAT3, a known target of GRIM-19-mediated inhibition. Lastly, tumor-associated GRIM-19 mutants significantly lost their ability to control v-Src-induced metastases in vivo, indicating the biological and pathological significance of these observations.Oncogene (2009) 28, 1339–1347; doi:10.1038/onc.2008.480; published online 19 January 2009
- Subjects
TUMOR suppressor genes; CELL motility; CANCER invasiveness; CANCER genetics; GENETIC transcription; CYTOSKELETAL proteins; GENETIC mutation; RETINOIDS; INTERFERONS; PREVENTION
- Publication
Oncogene, 2009, Vol 28, Issue 10, p1339
- ISSN
0950-9232
- Publication type
Article
- DOI
10.1038/onc.2008.480