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A variant of the Cockayne syndrome B gene ERCC6 confers risk of lung cancer.

ABSTRACT: Cockayne syndrome B protein (ERCC6) plays an essential role in DNA repair. However, the Cockayne syndrome caused by the ERCC6 defect has not been linked to cancer predisposition; likely due to the fact that cells with severe disruption of the ERCC6 function are sensitive to lesion-induced apoptosis, thus reducing the chance of tumorigenesis. The biological function and cancer susceptibility of a common variant rs3793784:C>G (c.-6530C>G) in the ERCC6 was examined. We show that the c.-6530C allele has lower binding affinity of Sp1 by EMSA and displays a lower transcriptional activity in vitro and in vivo. We then examined the contribution of this polymorphism to the risk of lung cancer in a case-control study with 1,000 cases and 1,000 controls. The case-control analysis revealed a 1.76-fold (P= x 10(-9)) excess risk of developing lung cancer for the c.-6530CC carriers compared with noncarriers. The c.-6530CC interacts with smoking to intensify lung cancer risk, with the odds ratio (OR)=9 for developing lung cancer among heavy smokers. Our data constituted strong evidence that ERCC6 rs3793784:C>G alters its transcriptional activity and may confer personalized susceptibility to lung cancer.

SUBMITTER: Lin Z 

PROVIDER: S-EPMC2441604 | biostudies-literature | 2008 Jan

REPOSITORIES: biostudies-literature

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Cockayne syndrome B protein (ERCC6) plays an essential role in DNA repair. However, the Cockayne syndrome caused by the ERCC6 defect has not been linked to cancer predisposition; likely due to the fact that cells with severe disruption of the ERCC6 function are sensitive to lesion-induced apoptosis, thus reducing the chance of tumorigenesis. The biological function and cancer susceptibility of a common variant rs3793784:C>G (c.-6530C>G) in the ERCC6 was examined. We show that the c.-6530C allele  ...[more]

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