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Potential sources of multiple mutations in human cancers
F C Christians1, T G Newcomb, L A Loeb
1Department of Pathology, Joseph Gottstein Memorial Cancer Research Laboratory, University of Washington, Seattle 98195, USA.
Preventive Medicine
|July 1, 1995
Summary
Human cancers exhibit genetic instability, a "mutator phenotype," leading to numerous mutations during tumor development. Targeting this instability could significantly reduce cancer deaths by delaying mutation accumulation.
Area of Science:
- Oncology
- Genetics
- Molecular Biology
Background:
- Most human cancers display multiple chromosomal alterations, suggesting a genetic instability.
- Spontaneous mutation rates in normal cells do not explain the high mutation burden in cancers.
Purpose of the Study:
- To review evidence supporting the mutator phenotype hypothesis in human cancers.
- To explore endogenous mutation sources and their role in cancer progression.
Main Methods:
- Review of existing literature on genomic instability and cancer.
- Analysis of studies linking mismatch repair, genomic instability, and cancer development.
Main Results:
- Cancer cells exhibit a mutator phenotype, characterized by genetic instability.
- Evidence connects mismatch repair mechanisms to the accumulation of mutations in cancer.
Conclusions:
- The mutator phenotype is a key factor in cancer progression.
- Therapeutic strategies aimed at delaying mutation accumulation may reduce cancer mortality.