Cited by 95DNA Repair MechanismsSkin Protection and AgingCarcinogens and Genotoxicity Assessment

Increased Susceptibility to UV-Induced Skin Carcinogenesis in Polymerase η–deficient Mice

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Lin, Qingcong, Clark, Alan B., McCulloch, Scott D., Yuan, Tao, Bronson, Roderick T., Kunkel, Thomas A., Kucherlapati, Raju·2006·Cancer Research

Abstract

Xeroderma pigmentosum variant (XPV) patients with mutations in the DNA polymerase η (pol η) gene are hypersensitive to sunlight and have greatly increased susceptibility to sunlight-induced skin cancer. Consistent with the ability of Pol η to efficiently bypass UV light–induced cyclobutane pyrimidine dimers, XPV cells lacking Pol η have diminished capacity to replicate UV-damaged DNA and are sensitive to UV light–induced killing and mutagenesis. To better understand these and other Pol η functions, we generated Pol η–deficient mice. Mice homozygous for a null mutation in pol η are viable, fertile, and do not show any obvious spontaneous defects during the first year of life. However, fibroblasts derived from these mutant mice are sensitive to killing by exposure to UV light, and all Pol η–deficient mice develop skin tumors after UV irradiation, in contrast to the wild-type littermate controls that did not develop such tumors. These results and biochemical studies of translesion synthesis by mouse Pol η indicate that Pol η–dependent bypass of cyclobutane pyrimidine dimers suppresses UV light–induced skin cancer in mice. Moreover, 37.5% of pol η heterozygous mice also developed skin cancer during 5 months after a 5-month exposure to UV light, suggesting that humans who are heterozygous for mutations in pol η may also have an increased risk of skin cancer. (Cancer Res 2006; 66(1): 87-94)

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Crossref · 10.1158/0008-5472.can-05-1862

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  • Pol eta can insert A or C opposite a site with 8-oxoG, which may result in a G to T transversion.

    “Pol eta can insert A or C opposite a site with 8-oxoG, which may result in a G to T transversion.”
  • Pol eta can perform bypass, with moderate efficiency, of 8-oxoG, which has a potentially important role in the suppression of mutations due to this oxidatively generated DNA lesion in human cells.

    “It can also perform the bypass, with moderate efficiency, of 8-oxoG, which has a potentially important role in the suppression of mutations due to this oxidatively generated DNA lesion in human cells [109,271].”

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Research works printed but not linked: 1

  1. Roberson EJ. Teratocarcinomas and embryonic stem cells. Oxford:IRL;1987.

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Authors
Lin, Q., Clark, A. B., McCulloch, S. D., Yuan, T., Bronson, R. T., Kunkel, T. A., & Kucherlapati, R.
Affiliations
  • Harvard University (US)
  • National Institutes of Health (US)
Venue
Cancer Research
Published
2006-01-01
Volume
66
Issue
1
Pages
87-94
ISSN
  • 0008-5472 (ISSN-L)
  • 1538-7445
OpenAlex
W2023871617
Cited by
95
References
38
Citations by year
2025: 2 · 2024: 1 · 2023: 4 · 2021: 2 · 2020: 2 · 2019: 6 · 2018: 5 · 2017: 6 · 2016: 7 · 2015: 6 · 2014: 3 · 2013: 3 · 2012: 7
FWCI
4.07
Type
journal article
Language
en
Open access
Locations
  • Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • The Mouseion at the JAXlibrary (Jackson Laboratory) (submittedVersion)
Funders
National Institutes of Health
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Health Sciences › Medicine › Dermatology › Skin Protection and Aging
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Carcinogens and Genotoxicity Assessment
Keywords
DNA polymerase eta, xeroderma pigmentosum variant, UV-induced skin carcinogenesis, cyclobutane pyrimidine dimers, translesion synthesis, UV-induced DNA damage, heterozygous carriers, skin cancer predisposition, UV mutagenesis
MeSH terms
Y-Family DNA Polymerases, Animals, Cell Survival, DNA-Directed DNA Polymerase, Embryo, Mammalian, Female, Fertility, Fibroblasts, Humans, Pregnancy, Skin Neoplasms, Ultraviolet Rays, Gene Deletion, Mice

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