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Meta-Analysis
. 2013 Nov;54(6):1384-93.
doi: 10.3349/ymj.2013.54.6.1384.

Influence of methylenetetrahydrofolate reductase C677T polymorphism on the risk of lung cancer and the clinical response to platinum-based chemotherapy for advanced non-small cell lung cancer: an updated meta-analysis

Ning Zhu  1 , Yi Gong, Jian He, Jingwen Xia, Xiaodong Chen
Affiliations
Meta-Analysis

Influence of methylenetetrahydrofolate reductase C677T polymorphism on the risk of lung cancer and the clinical response to platinum-based chemotherapy for advanced non-small cell lung cancer: an updated meta-analysis

Ning Zhu et al. Yonsei Med J. 2013 Nov.

Abstract

Purpose: Methylenetetrahydrofolate reductase (MTHFR) has been implicated in lung cancer risk and response to platinum-based chemotherapy in advanced non-small cell lung cancer (NSCLC). However, the results are controversial. We performed meta-analysis to investigate the effect of MTHFR C677T polymorphism on lung cancer risk and response to platinum-based chemotherapy in advanced NSCLC.

Materials and methods: The databases of PubMed, Ovid, Wanfang and Chinese Biomedicine were searched for eligible studies. Nineteen studies on MTHFR C677T polymorphism and lung cancer risk and three articles on C677T polymorphism and response to platinum-based chemotherapy in advanced NSCLC, were identified.

Results: The results indicated that the allelic contrast, homozygous contrast and recessive model of the MTHFR C677T polymorphism were associated significantly with increased lung cancer risk. In the subgroup analysis, the C677T polymorphism was significantly correlated with an increased risk of NSCLC, with the exception of the recessive model. The dominant model and the variant T allele showed a significant association with lung cancer susceptibility of ever smokers. Male TT homozygote carriers had a higher susceptibility, but the allelic contrast and homozygote model had a protective effect in females. No relationship was observed for SCLC in any comparison model. In addition, MTHFR 677TT homozygote carriers had a better response to platinum-based chemotherapy in advanced NSCLC in the recessive model.

Conclusion: The MTHFR C677T polymorphism might be a genetic marker for lung cancer risk or response to platinum- based chemotherapy in advanced NSCLC. However, our results require further verification.

Keywords: C677T; MTHFR; lung cancer; platinum-based chemotherapy; polymorphism.

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Conflict of interest statement

The authors have no financial conflicts of interest.

Figures

Fig. 1
Fig. 1
Flow chart of the reterived steps of our meta-analysis. NSCLC, non-small cell lung cancer; CBM, Chinese Biomedicine.
Fig. 2
Fig. 2
Meta-analysis for the association between the recessive model of MTHFR C677T polymorphism and response to platinum-based chemotherapy in advanced NSCLC. CI, confidence interval; NSCLC, non-small cell lung cancer.
Fig. 3
Fig. 3
Funnel plot of MTHFR C677T ploymorphism and lung cancer (T allele vs. C allele).
See this image and copyright information in PMC

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