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Elongation factor-1 alpha gene determines susceptibility to transformation
1Department of Molecular Bioregulation, Kyoto Pharmaceutical University, Japan.
Nature
|September 24, 1992
Summary
Elongation factor-1 alpha (EF-1 alpha), a key protein synthesis factor, was found to increase cell susceptibility to malignant transformation when its expression is unregulated. Constitutive EF-1 alpha expression in fibroblasts leads to increased transformation risk.
Area of Science:
- Molecular Biology
- Cell Biology
- Cancer Research
Background:
- Elongation factor-1 alpha (EF-1 alpha) is crucial for protein synthesis in eukaryotes.
- EF-1 alpha gene expression declines with age in human and mouse cells.
- Components of the protein synthesis machinery may regulate cell proliferation.
Purpose of the Study:
- To identify a factor influencing fibroblast susceptibility to chemical and physical transformation.
- To investigate the role of EF-1 alpha in cell transformation and proliferation control.
Main Methods:
- Expression cloning was used to isolate a complementary DNA clone from a mouse fibroblast variant.
- Fibroblast cell lines (BALB/c3T3, C3H10T1/2, SHOK) were analyzed for transformation susceptibility.
- EF-1 alpha expression levels were measured in relation to cell transformation.
Main Results:
- The isolated factor responsible for transformation susceptibility was identified as EF-1 alpha.
- Constitutive expression of EF-1 alpha significantly increased the susceptibility of multiple fibroblast cell types to transformation induced by carcinogens and UV light.
- Constitutively expressed EF-1 alpha messenger RNA was observed in a highly susceptible fibroblast variant.
Conclusions:
- EF-1 alpha plays a significant role in controlling cell susceptibility to malignant transformation.
- Dysregulation of EF-1 alpha expression may predispose cells to cancer development.
- Components of the translational machinery are implicated in the regulation of cell proliferation and transformation.
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