Abstract |
Genetic polymorphisms at the genes involved in mismatch repair may determine individual's susceptibility to cancer initiation and progression. However, the prognostic significance of hMSH2 gIVS12-6T>C polymorphism (T-C substitution at the -6 intronic splice acceptor site of exon 13) in non-small cell lung cancer (NSCLC) remains unclear. Therefore, we investigated the frequency of hMSH2 gIVS12-6T>C polymorphism in 156 NSCLC patients and 235 cancer-free individuals matched for age, gender and smoking habit. The correlations between hMSH2 genotypes and protein expression and survival of the patients were also analyzed. The frequencies of hMSH2 genotypes T/T, T/C, and C/C were 37.4%, 43.0%, and 19.6%, respectively, and the variant (C) allele was represented at a significantly higher frequency in the general Taiwanese population than in non-Asian populations (P<0.0001, chi(2) test). No significant difference in hMSH2 genotype distribution was found between NSCLC patients and cancer-free controls (P=0.255, multivariate logistic regression). However, the homozygous wild-type T/T genotype was significantly associated with a poor prognosis (P=0.007, log-rank test). Our study showed that the frequency of the variant C allele was significantly higher in the general Taiwanese population than in non-Asian populations and the T/T genotype of hMSH2 gIVS12-6T>C polymorphism was a poor prognostic factor in NSCLC patients.
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Authors | Han-Shui Hsu, I-Hsuan Lee, Wen-Hu Hsu, Wei-Ting Kao, Yi-Ching Wang |
Journal | Lung cancer (Amsterdam, Netherlands)
(Lung Cancer)
Vol. 58
Issue 1
Pg. 123-30
(Oct 2007)
ISSN: 0169-5002 [Print] Ireland |
PMID | 17566596
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Genetic Markers
- MSH2 protein, human
- MutS Homolog 2 Protein
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Topics |
- Adult
- Aged
- Aged, 80 and over
- Alleles
- Asian People
- Carcinoma, Non-Small-Cell Lung
(genetics, physiopathology)
- Female
- Genetic Markers
- Genetic Predisposition to Disease
- Humans
- Lung Neoplasms
(genetics, physiopathology)
- Male
- Middle Aged
- MutS Homolog 2 Protein
(genetics)
- Polymorphism, Single Nucleotide
- Prognosis
- Promoter Regions, Genetic
- Taiwan
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