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- Title
Suppression of src-induced transformed phenotype by expression of tropomyosin-1.
- Authors
Prasad, G L; Masuelli, L; Raj, M H G; Harindranath, N
- Abstract
Suppression of high Mr tropomyosins (TMs) is a common feature of transformed cells. Previous work from this laboratory has demonstrated that the isoform 1 of TM, TM1, acts as an anti-oncogene in ras-transformed murine fibroblasts. In this study, we have investigated whether TM1 is a ras-specific suppressor, or a general suppressor protein of the cellular transformation. V-src transformed fibroblasts, which express decreased TM1, were transduced with a full-length cDNA to overexpress TM1. Both the control and the transduced cells expressed v-src kinase at comparable levels. TM1 expressing (src-T1) cells grew at a lower rate in monolayer, exhibited well spread, flat morphology than the control cells. Enhanced expression of TM1 resulted in improved microfilamental architecture. More significantly, src-T1 cells completely failed to grow under anchorage independent conditions. These data demonstrate that TM1 is as an anti-oncogene of functionally diverse oncogenes, and it is a class II tumor suppressor protein.
- Subjects
TROPOMYOSINS; PROTEIN expression; PHENOTYPES; FIBROBLASTS; LABORATORY mice
- Publication
Oncogene, 1999, Vol 18, Issue 11, p2027
- ISSN
0950-9232
- Publication type
Article
- DOI
10.1038/sj.onc.1202264