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Carcinogenesis. 2014 Sep;35(9):2047-54. doi: 10.1093/carcin/bgu098. Epub 2014 Apr 29.

Aromatic adducts and lung cancer risk in the European Prospective Investigation into Cancer and Nutrition (EPIC) Spanish cohort.

Author information

  • 1Unit of Nutrition, Environment and Cancer, Cancer Epidemiology Research Program, Catalan Institute of Oncology-IDIBELL, L'Hospitalet de Llobregat, Barcelona 08908, Spain.
  • 2Cancer Risk Factor Branch, ISPO-Cancer Prevention and Research Institute, Florence 50131, Italy.
  • 3Granada Cancer Registry, Andalusian School of Public Health, Granada 18080, Spain, CIBER de Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain.
  • 4CIBER de Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain, Department of Epidemiology, Murcia Health Council, Murcia 30003, Spain.
  • 5CIBER de Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain, Public Health Division of Gipuzkoa, BIODonostia Research Institute, Department of Health of the regional Government of the Basque Country, San Sebastian 48902, Spain.
  • 6CIBER de Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain, Public Health Institute of Navarra, Pamplona 31003, Spain.
  • 7Public Health Directorate, Asturias 31003, Spain.
  • 8Unit of Analytical Citology and Bimolecular, ISPO-Cancer Prevention and Research Institute, Florence 50131, Italy and.
  • 9Unit of Nutrition, Environment and Cancer, Cancer Epidemiology Research Program, Catalan Institute of Oncology-IDIBELL, L'Hospitalet de Llobregat, Barcelona 08908, Spain, Molecular Epidemiology Group, Translational Research Laboratory, Catalan Institute of Oncology-IDIBELL, L'Hospitalet de Llobregat, Barcelona 08908, Spain.
  • 10Unit of Nutrition, Environment and Cancer, Cancer Epidemiology Research Program, Catalan Institute of Oncology-IDIBELL, L'Hospitalet de Llobregat, Barcelona 08908, Spain, a.agudo@iconcologia.net.

Abstract

In this case-cohort study, we examined the association between bulky DNA adducts and the risk of lung cancer within the European Prospective Investigation into Cancer and Nutrition (EPIC) Spanish cohort with an average 7-year follow-up, including 98 cases of primary lung cancer and 296 subjects randomly selected from the cohort. Aromatic adducts were measured using (32)P-postlabeling in leukocyte DNA from blood samples collected at enrollment. The association between DNA adducts and the risk of lung cancer was estimated using a Cox proportional hazards model with a modified partial likelihood. There was an overall significant increased risk for developing lung cancer when DNA adduct concentrations were doubled, with relative risk (RR) adjusting for all relevant confounders of 1.36 with 95% confidence interval (CI) 1.18-157. There was a significant increased risk for developing lung cancer when DNA adduct concentrations were doubled for current smokers and among subjects exposed to PAH at work; there was also a slightly higher increase among males than females. However, no statistically significant differences were observed for the effect of adduct levels across smoking status, sex or occupational exposure to PAH. A meta-analysis combined four prospective studies, including this study, resulting in a significant association among current smokers, with an overall estimate of 34% increase in the risk of lung cancer when doubling the level of aromatic DNA adducts in leukocytes.

© The Author 2014. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

PMID:
24845263
[PubMed - indexed for MEDLINE]
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