Smoky coal exposure, NBS1 polymorphisms, p53 protein accumulation, and lung cancer risk in Xuan Wei, China

Qing Lan, Min Shen, Sonja I. Berndt, Matthew R. Bonner, Xingzhou He, Meredith Yeager, Robert Welch, Phouthone Keohavong, Mark Donahue, Pierre Hainaut, Stephen Chanock

Research output: Contribution to journalArticlepeer-review

Abstract

Lung cancer rates in Xuan Wei County are among the highest in China and have been associated with exposure to indoor smoky coal emissions that contain high levels of polycyclic aromatic hydrocarbons (PAHs). The NBS1 gene product participates in DNA double-strand break repair and DNA damage-induced checkpoint activation, which are critical for maintaining genomic integrity. The p53 tumor suppressor gene is known to play key roles both in the maintenance of genomic stability in mammalian cells and in DNA damage surveillance. We examined the association between two common NBS1 polymorphisms (Leu34Leu, Gln185Glu) and lung cancer risk in a population-based case-control study in Xuan Wei, China. Individuals homozygous for the NBS1 34Leu or NBS1 185Glu variants were found to have an increased risk of lung cancer (odds ratio [OR] 2.15, 95% confidence interval [CI]: 0.91-5.10 and OR 2.53, 95% CI: 1.05-6.08, respectively). A haplotype containing the variant alleles from both NBS1 SNPs was associated with increased risk of lung cancer compared with the most common haplotype. Further, the associations were particularly pronounced among cases with over expression of p53 protein. These results suggest that NBS1 could be important in the pathogenesis of lung cancer in this population. However, additional studies in other populations with substantial environmental exposures to PAHs are needed to confirm our findings.

Original languageEnglish (US)
Pages (from-to)317-323
Number of pages7
JournalLung Cancer
Volume49
Issue number3
DOIs
StatePublished - Sep 2005

Keywords

  • Haplotype
  • Lung cancer
  • Polycyclic aromatic hydrocarbons

ASJC Scopus subject areas

  • Oncology
  • Pulmonary and Respiratory Medicine
  • Cancer Research

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