Cited by 126Carcinogens and Genotoxicity AssessmentDNA Repair MechanismsDNA and Nucleic Acid Chemistry

Factors that influence the mutagenic patterns of DNA adducts from chemical carcinogens

Open access
Seo, Kwang-Young, Jelinsky, Scott A., Loechler, Edward L.·2000·Mutation Research/Reviews in Mutation Research

Abstract

Carcinogens are generally mutagens, which is understandable given that tumor cells grow uncontrollably because they have mutations in critical genes involved in growth control. Carcinogens often induce a complex pattern of mutations (e.g., GC-->TA, GC-->AT, etc.). These mutations are thought to be initiated when a DNA polymerase encounters a carcinogen-DNA adduct during replication. In principle, mutational complexity could be due to either a collection of different adducts each inducing a single kind of mutation (Hypothesis 1a), or a single adduct inducing different kinds of mutations (Hypothesis 1b). Examples of each are discussed. Regarding Hypothesis 1b, structural factors (e.g., DNA sequence context) and biological factors (e.g., differing DNA polymerases) that can affect the pattern of adduct mutagenesis are discussed. This raises the question: how do structural and biological factors influence the pattern of adduct mutagenesis. For structural factors, three possibilities are considered: (Hypothesis 2a) a single conformation of an adduct giving rise to multiple mutations -- dNTP insertion by DNA polymerase being influenced by (e.g.) the surrounding DNA sequence context; (Hypothesis 2b) a variation on this ("dislocation mutagenesis"); or (Hypothesis 2c) a single adduct adopting multiple conformations, each capable of giving a different pattern of mutations. Hypotheses 2a, 2b and 2c can each in principle rationalize many mutational results, including how the pattern of adduct mutagenesis might be influenced by factors, such as DNA sequence context. Five lines of evidence are discussed suggesting that Hypothesis 2c can be correct for base substitution mutagenesis. For example, previous work from our laboratory was interpreted to indicate that [+ta]-B[a]P-N(2)-dG in a 5'-CGG sequence context (G115) could be trapped in a conformation giving predominantly G-->T mutations, but heating caused the adduct to equilibrate to its thermodynamic mixture of conformations, leading to a decrease in the fraction of G-->T mutations. New work is described suggesting that [+ta]-B[a]P-N(2)-dG at G115 can also be trapped predominantly in the G-->A mutational conformation, from which equilibration can also occur, leading to an increase in the fraction of G-->T mutations. Evidence is also presented that the fraction of G-->T mutations is higher when [+ta]-B[a]P-N(2)-dG at G115 is in ss-DNA ( approximately 89%) vs. ds-DNA ( approximately 66%), a finding that can be rationalized if the mixture of adduct conformations is different in ss- and ds-DNA. In summary, the factors affecting adduct mutagenesis are reviewed and five lines of evidence that support one hypothesis (2c: adduct conformational complexity can cause adduct mutational complexity) are discussed.

Integrity signals

Registry

Crossref · 10.1016/s1383-5742(00)00047-8

Cites

199 of 199 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • KRAS mutations, especially KRASG12C and KRASG12V, are strongly associated with smoking.

    “Unlike other clinically actionable genomic alterations found in NSCLCs (such as EGFR and ALK aberrations), KRAS mutations, particularly KRASG12C and KRASG12V, are strongly associated with smoking29–31.”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Seo, K.-Y., Jelinsky, S. A., & Loechler, E. L.
Affiliations
Boston University (US)
Corresponding author
Loechler, Edward L.
Venue
Mutation Research/Reviews in Mutation Research
Publisher
Elsevier BV
Published
2000-10
Volume
463
Issue
3
Pages
215-246
ISSN
1383-5742 (ISSN-L)
OpenAlex
W2091661023
Cited by
126
References
199
Citations by year
2026: 1 · 2025: 1 · 2024: 3 · 2023: 2 · 2022: 4 · 2021: 5 · 2020: 7 · 2019: 3 · 2018: 2 · 2017: 4 · 2016: 1 · 2015: 4 · 2014: 5 · 2013: 5 · 2012: 5
FWCI
3.36
Type
journal article
Language
en
Open access
Locations
  • Mutation Research/Reviews in Mutation Research (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (1s10rr011397-01)
  • National Institute of Environmental Health Sciences (ES 03775, R01ES003775)
  • National Center for Research Resources (RR11397)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Carcinogens and Genotoxicity Assessment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
Keywords
DNA adducts, chemical carcinogens, DNA sequence context, DNA polymerase, benzo[a]pyrene, mutational hotspots, DNA replication errors
MeSH terms
Animals, Benzo(a)pyrene, Carcinogens, DNA, DNA Damage, DNA-Directed DNA Polymerase, DNA Replication, Eukaryotic Cells, Humans, Models, Biological, Mutagens, Nucleic Acid Conformation, Prokaryotic Cells, Structure-Activity Relationship, Temperature, 7,8-Dihydro-7,8-dihydroxybenzo(a)pyrene 9,10-oxide, Mutagenesis, Point Mutation, DNA Adducts

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review