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An Ecdysone Receptor-based Singular Gene Switch for Deliberate Expression of Transgene with Robustness, Reversibility, and Negligible Leakiness
Published on: May 7, 2018
Transformation effector and suppressor genes
1Division of Toxicology, Whitaker College of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge 02139.
Abstract:
Much has been learned about the molecular basis of cancer from the study of the dominantly acting viral and cellular oncogenes and their normal progenitors, the proto-oncogenes. More recent studies have resulted in the isolation and characterization of several genes prototypic of a second class of cancer genes. Whereas oncogenes act to promote the growth of cells, members of this latter class of genes act to inhibit cellular growth and are believed to contribute to the tumorigenic phenotype only when their activities are absent. This new class of cancer genes is referred to by a number of different names including; anti-oncogenes, recessive oncogenes, growth suppressor genes, tumor suppressor genes and emerogenes. Although only a few of these cancer genes have been identified, to date, it is likely that many additional genes of this class await identification. A third class of genes, necessary for the development of the cancer phenotype, is comprised of the transformation effector genes. These are normal cellular genes that encode proteins that cooperate with or activate oncogene functions and thereby induce the development of the neoplastic phenotype. The inactivation of transformation effector functions would therefore inhibit the ability of certain dominantly acting oncogenes to transform cells. The approaches outlined here describe functional assays for the isolation and molecular characterization of transformation effector and suppressor genes.
Insights
This study explores cancer-causing genes, including oncogenes that promote cell growth and tumor suppressor genes that inhibit it. It also identifies transformation effector genes that activate oncogenes, crucial for cancer development.
Area of Science:
- Molecular biology
- Cancer genetics
- Oncology
Background:
- Cancer development involves oncogenes promoting cell growth.
- A second class of genes, tumor suppressor genes, inhibit cellular growth.
- Transformation effector genes activate oncogenes, contributing to neoplasia.
Purpose of the Study:
- To characterize a second class of cancer genes that inhibit cell growth (e.g., tumor suppressor genes).
- To identify and characterize transformation effector genes involved in cancer development.
- To outline functional assays for isolating these critical gene classes.
Main Methods:
- Functional assays for gene isolation and molecular characterization.
- Comparative analysis of oncogenes, tumor suppressor genes, and transformation effector genes.
- Molecular basis of cancer research.
Main Results:
- Identified tumor suppressor genes as inhibitors of cellular growth.
- Characterized transformation effector genes that cooperate with oncogenes.
- Established methods for isolating novel cancer-related genes.
Conclusions:
- Cancer involves multiple gene classes: oncogenes, tumor suppressor genes, and transformation effector genes.
- Tumor suppressor genes are critical for inhibiting uncontrolled cell proliferation.
- Understanding these genes provides targets for cancer therapy.
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