A genome-wide association study revealed that a single nucleotide polymorphism, CLPTM1L - rs401681 (G>A), located at the 5p15.33 locus was signifi cantly associated with increased risk of various cancers; however, its association with lung cancer is currently inconclusive. In order to explore the relationship between this polymorphism and lung cancer risk more precisely, we performed a meta-analysis of eight eligible studies involving 9935 cases and 11,261 controls. The pooled odds ratio (OR) and the 95% confi dence interval (CI) were calculated using a fi xed- or random-effect models. Results indicated that this polymorphism was signifi cantly associated with lung cancer risk in all genetic models (GA vs GG: OR = 0.88, 95%CI = 0.83-0.94; AA vs GG: OR = 0.81, 95%CI = 0.70-0.93; AA/GA vs GG: OR = 0.86, 95%CI = 0.81-0.91; AA vs GA/GG:OR = 0.86, 95%CI = 0.76-0.99). An analysis stratiï¬ed by ethnicity and source of controls revealed a significantly decreased risk among European groups and population-based studies in all genetic models, and among Asian populations only in the dominant model comparison. Additionally, in a subgroup analysis by histology type, the CLPTM1L rs401681 polymorphism was found to signiï¬cantly decrease the risks of both adenocarcinoma and squamous cell carcinoma of the lung in all genetic models. In conclusion, our study indicated that the CLPTM1L - rs401681 (G>A) polymorphism was significantly associated with decreased lung cancer risk, especially among European populations. Due to some minor limitations, our ï¬ndings should be conï¬rmed in further studies.
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