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Related Experiment Videos

XPC polymorphisms and lung cancer risk.

Ga Young Lee1, Jin-Sung Jang, Sin Yeob Lee

  • 1Cancer Research Institute, Kyungpook National University Hospital, Daegu, South Korea.

International Journal of Cancer
|February 25, 2005
PubMed
Summary

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Genetic variations in the XPC gene are linked to lung cancer risk. Specific XPC polymorphisms and haplotypes influence susceptibility, particularly for squamous cell and small cell lung carcinoma in the Korean population.

Area of Science:

  • Genetics
  • Oncology
  • Molecular Epidemiology

Background:

  • DNA repair gene polymorphisms may alter cancer susceptibility.
  • The XPC gene plays a role in DNA damage repair.
  • Investigating XPC variants could elucidate lung cancer risk factors.

Purpose of the Study:

  • To examine the association between 7 XPC polymorphisms and their haplotypes with lung cancer risk in a Korean population.
  • To determine if specific XPC genotypes or haplotypes correlate with increased or decreased lung cancer risk.
  • To analyze the relationship between XPC variations and different lung cancer histological subtypes.

Main Methods:

  • Genotyping of 7 XPC polymorphisms in 432 lung cancer patients and 432 controls.
  • Haplotype prediction using a Bayesian algorithm (Phase program).

Related Experiment Videos

  • Statistical analysis of genotype and haplotype associations with overall and subtype-specific lung cancer risk.

    • Main Results:

    • The XPC -27CG+CC genotype showed a significantly increased risk for overall lung cancer (OR=1.97).
    • The XPC -371AA genotype was associated with increased squamous cell carcinoma risk (OR=2.08).
    • Certain XPC polymorphisms (PAT-/+, IVS11-5C-->A, Lys939Gln) and haplotypes (haplotype 4, haplotype 5) were significantly associated with decreased or increased risk of small cell carcinoma.

    Conclusions:

    • XPC polymorphisms, specifically the -27G-->C variant, may increase overall lung cancer risk.
    • Specific XPC genotypes and haplotypes are associated with differential risks for lung cancer subtypes.
    • Findings suggest XPC genetic variations contribute to individual susceptibility to smoking-related lung cancer.