The molecular control of DNA damage-induced cell death
- PMID: 11303908
- DOI: 10.1023/a:1009617727938
The molecular control of DNA damage-induced cell death
Abstract
Because of the singular importance of DNA for genetic inheritance, all organisms have evolved mechanisms to recognize and respond to DNA damage. In metazoans, cells can respond to DNA damage either by undergoing cell cycle arrest, to facilitate DNA repair, or by undergoing cell suicide. Cell death can either occur by activation of the apoptotic machinery or simply be a consequence of irreparable damage that prevents further cell division. In germ cells, mechanisms for limiting alterations to the genome are required for faithful propagation of the species whereas in somatic cells, responses to DNA damage prevent the accumulation of mutations that might lead to aberrant cell proliferation or behavior. Several of the genes that regulate cellular responses to DNA damage function as tumor suppressors. The clinical use of DNA damaging agents in the treatment of cancer can activate these tumor suppressors and exploits the cellular suicide and growth arrest mechanisms that they regulate. It appears that in some but not all types of tumors the propensity to undergo apoptosis is a critical determinant of their sensitivity to anti-cancer therapy. This review describes current understanding of the molecular control of DNA damage-induced apoptosis with particular attention to its role in tumor suppression and cancer therapy.
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