NER and Cancer
Though historical studies have shown inconsistent results, genetic variation or mutation to nucleotide excision repair genes can impact cancer risk by affecting repair efficacy. Single-nucleotide polymorphisms (SNPs) and nonsynonymous coding SNPs (nsSNPs) are present at very low levels (>1%) in the human population. If located in NER genes or regulatory sequences, such mutations can negatively affect DNA repair capacity resulting in an increase likelihood of cancer development. While the functional impact of all polymorphisms has not been characterized, some polymorphisms in DNA repair genes or their regulatory sequences do induce phenotypical changes and are involved in cancer development. A study of lung cancer cases found modest association between NER specific SNP polymorphisms and lung cancer risk. The results indicate that some inherited polymorphic variations in NER genes may result in predisposition to lung cancer, and potentially other cancer states.
Read more about this topic: Transcription-coupled Repair
Famous quotes containing the word cancer:
“Madness is locked beneath. It goes into tissues, is swallowed by the cells. The cells go mad. Cancer is their flag. Cancer is the growth of madness denied.”
—Norman Mailer (b. 1923)