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Transformation of mouse cells by wild-type mouse c-Src
P H Lin1, S Shenoy, T Galitski
1Section of Biochemistry, Molecular and Cell Biology, Cornell University, Ithaca, New York 14853.
Oncogene
|January 19, 1995
Summary
Overexpressed mouse c-Src, unlike chicken c-Src, transforms NIH3T3 cells, indicating species-specific differences in c-Src (cellular Src) function. This highlights the need to consider species-specific effects in cancer research.
Area of Science:
- Molecular Biology
- Cellular Biology
- Oncology
Background:
- Previous studies indicated wild-type c-Src overexpression does not fully induce neoplastic transformation.
- Studies with viral Src (v-Src) mutants suggested species-specific differences impact transforming activity.
Purpose of the Study:
- To investigate species-specific differences in c-Src transforming activity.
- To determine if mouse c-Src can induce neoplastic transformation in mouse cells, unlike chicken c-Src.
Main Methods:
- Overexpression of mouse c-Src and chicken c-Src in NIH3T3 mouse cells.
- Assessment of anchorage-independent growth and tumorigenicity.
- Comparison of protein-tyrosine kinase activities between chicken and mouse c-Src.
Main Results:
- Overexpressed mouse c-Src induced significant anchorage-independent growth and tumorigenicity in NIH3T3 cells.
- Chicken c-Src overexpression did not induce similar transforming effects in the same cell line.
- Protein-tyrosine kinase activities of chicken and mouse c-Src appeared similar, suggesting non-kinase activity differences.
Conclusions:
- Mouse c-Src exhibits greater transforming potential than chicken c-Src in NIH3T3 cells.
- Species-specific differences in c-Src function are crucial for understanding transformation.
- Results support the hypothesis that v-Src transformation involves perturbation of c-Src-modulated signaling pathways.