title: CCND1 G870A polymorphism interaction with cigarette smoking increases lung cancer risk: meta-analyses based on 5008 cases and 5214 controls.
abstract: Evidence indicates CCND1 G870A polymorphisms as a risk factor for a number of cancers. Increasing studies have been conducted on the association of CCND1 G870A polymorphism with lung cancer risk. However, the results were controversial. The aim of the present study was to derive a more precise estimation of the relationship. Meta-analyses examining the association between CCND1 G870A polymorphism and lung cancer were performed. Subgroup analyses regarding ethnicity, smoking status, histological types and source of controls were also implemented. All eligible studies for the period up to May 2012 were identified. The overall data from ten case-control studies including 5,008 cases and 5,214 controls indicated that variant A allele may have an association with increased lung cancer risk (AA vs GG: OR = 1.21; 95 % CI = 1.08-1.36, dominant model: OR = 1.09; 95 % CI = 1.00-1.19, recessive model: OR = 1.23; 95 % CI = 1.01-1.49). In the subgroup analysis by ethnicity, A allele may elevate lung cancer risk among Asians but not Caucasians or Mixed ethnicities. In smoking status subgroup, A allele was shown to associate with increased lung cancer risk among smokers but not non-smokers. In the subgroup analysis by histological types, increased cancer risks were shown in adenocarcinoma but not squamous cell carcinoma, under the homozygote comparison and recessive models. Collectively, the results of the present study suggest that CCND1 G870A polymorphism might be a low-penetrant risk factor for lung cancer, particularly among Asians and smokers. Moreover, homozygous AA alleles might have a correlation with increased lung adenocarcinoma susceptibility.
authors: Institute of Cancer, Xinqiao Hospital, Third Military Medical University, Chongqing, 400038, China.
authors: Yu-Zhong
authors: YZ
authors: Duan
authors: Liang
authors: L
authors: Zhang
authors: Chang-Chih
authors: CC
authors: Liu
authors: Bo
authors: B
authors: Zhu
authors: Wen-Lei
authors: WL
authors: Zhuo
authors: Zheng-Tang
authors: ZT
authors: Chen
mesh_terms: D000483:Alleles; D016022:Case-Control Studies; D019938:Cyclin D1 / Q000235:genetics*; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D008175:Lung Neoplasms / Q000209:etiology* / Q000235:genetics; D016017:Odds Ratio; D011110:Polymorphism, Genetic; D017594:Publication Bias; D012306:Risk; D012907:Smoking
chemical_list: C530104:CCND1 protein, human; D019938:Cyclin D1
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