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Title: Regulation and disregulation of mammalian nucleotide excision repair: A pathway to nongermline breast carcinogenesis

Journal Article · · Photochemistry and Photobiology
DOI:https://doi.org/10.1111/php.12387· OSTI ID:1344921

Nucleotide excision repair (NER) is important as a modulator of disease, especially in constitutive deficiencies, such as the cancer predisposition syndrome Xeroderma pigmentosum. We have found profound variation of NER capacity among normal individuals, between cell-types and during carcinogenesis. NER is a repair system for many types of DNA damage, and therefore many types of genotoxic carcinogenic exposures, including ultraviolet light, products of organic combustion, metals, oxidative stress, etc. Since NER is intimately related to cellular metabolism, requiring components of both the DNA replicative and transcription machinery, it has a narrow range of functional viability. Thus, genes in the NER pathway are expressed at the low levels manifested by, for example, nuclear transcription factors. Since NER activity and gene expression vary by cell-type, it is inherently epigenetically regulated. Furthermore, this epigenetic regulation is disregulated during sporadic breast carcinogenesis. Loss of NER is one basis of genomic instability, a required element in cellular transformation, and one that potentially modulates response to therapy. In this article, we demonstrate differences in NER capacity in eight adult mouse tissues, and place this result into the context of our previous work on mouse extraembryonic tissues, normal human tissues and sporadic early stage human breast cancer.

Research Organization:
Nova Southeastern Univ., Fort Lauderdale, FL (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC03-76SF01012
OSTI ID:
1344921
Journal Information:
Photochemistry and Photobiology, Vol. 91, Issue 2; ISSN 0031-8655
Publisher:
The American Society of PhotobiologyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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Cited By (3)

Preliminary Evidence for a Hormetic Effect on DNA Nucleotide Excision Repair in Veterans with Gulf War Illness journal July 2019
Nucleotide excision repair is a predictor of early relapse in pediatric acute lymphoblastic leukemia journal October 2018
Contribution of excision repair cross-complementing group 1 genotypes to triple negative breast cancer risk journal August 2018