Cited by 72Antioxidant Activity and Oxidative StressCarcinogens and Genotoxicity AssessmentCancer Risks and Factors

Association between 8-oxo-7,8-dihydro-2′-deoxyguanosine Excretion and Risk of Postmenopausal Breast Cancer: Nested Case–Control Study

Loft, Steffen, Olsen, Anja, Møller, Peter, Poulsen, Henrik E., Tjønneland, Anne·2013·Cancer Epidemiology, Biomarkers & Prevention

Abstract

Background: Oxidative stress may be important in carcinogenesis and a possible risk factor for breast cancer. The urinary excretion of oxidatively generated biomolecules, such as 8-oxo-7,8-dihydro-2′-deoxyguanosine (8-oxodG), represents biomarkers of oxidative stress, reflecting the rate of global damage to DNA in steady state. Methods: In a nested case–control design, we examined associations between urinary excretion of 8-oxodG and risk of breast cancer in a population-based cohort of 24,697 postmenopausal women aged 50 to 64 years with 3 to 7 years follow-up. The accruing cases of breast cancer were matched to controls by age at diagnosis, baseline age, and hormone replacement therapy (HRT). Spot urine samples collected at entry was analyzed for 8-oxodG by high-performance liquid chromatography with electrochemical detection. Incidence rate ratio (IRR; 95% confidence intervals) based on 336 matched pairs with all information was estimated per unit increase in 8-oxodG divided by creatinine for all and estrogen receptor (ER) positive and negative breast cancers. Results: There was a borderline significant positive association between 8-oxodG and risk of all breast cancer (IRR: 1.08; 1.00–1.17 per unit increase in nmol/mmol creatinine). This association was significant with respect to the risk of ER-positive cancer (IRR: 1.11; 1.01–1.23) and among women not using HRT (IRR: 1.11; 0.97–1.26) or with low dietary iron intake (IRR: 1.10; 1.06–1.37 per unit increase) for all breast cancer. Conclusions: We observed positive association between 8-oxodG excretion and risk of especially ER-positive breast cancer. Impact: Our results suggest that oxidative stress with damage to DNA is important for the development of breast cancer. Cancer Epidemiol Biomarkers Prev; 22(7); 1289–96. ©2013 AACR.

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Crossref · 10.1158/1055-9965.epi-13-0229

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Authors
Loft, S., Olsen, A., Møller, P., Poulsen, H. E., & Tjønneland, A.
Affiliations
  • University of Copenhagen (DK)
  • Authors' Affiliations: 1Department of Public Health, Section of Enviromental Health, Faculty of Health and Medical Sciences, University of Copenhagen; 2Institute of Cancer Epidemiology, The Danish Cancer Society; 3Department of Clinical Pharmacology, Bispebjerg Hospital and Laboratory of Clinical Pharmacology, Q7642, Rigshospitalet, University of Copenhagen, Denmark
Venue
Cancer Epidemiology, Biomarkers & Prevention
Published
2013-07-01
Volume
22
Issue
7
Pages
1289-1296
ISSN
  • 1055-9965 (ISSN-L)
  • 1538-7755
OpenAlex
W2130091539
Cited by
72
References
51
Citations by year
2026: 1 · 2025: 5 · 2024: 4 · 2023: 7 · 2022: 3 · 2021: 5 · 2020: 4 · 2019: 4 · 2018: 5 · 2017: 11 · 2016: 7 · 2015: 7 · 2014: 8 · 2013: 1
FWCI
5.73
Type
journal article
Language
en
Open access
closed
Locations
  • Cancer Epidemiology Biomarkers & Prevention (publishedVersion)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (submittedVersion)
Topics
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Carcinogens and Genotoxicity Assessment
  • Health Sciences › Medicine › Oncology › Cancer Risks and Factors
Keywords
8-oxo-7,8-dihydro-2'-deoxyguanosine, oxidative stress, postmenopausal breast cancer, urinary biomarkers, DNA damage, estrogen receptor-positive breast cancer, hormone replacement therapy, iron intake, biomarkers of carcinogenesis
MeSH terms
8-Hydroxy-2'-Deoxyguanosine, Breast Neoplasms, Denmark, Deoxyguanosine, Diet, DNA Damage, Female, Follow-Up Studies, Humans, Middle Aged, Prospective Studies, Receptors, Estrogen, Risk Factors, Biomarkers, Tumor, Cohort Studies, Case-Control Studies, Postmenopause, Oxidative Stress

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