Vitamin D receptor gene polymorphisms and colorectal cancer risk：A systematic meta-analysis

AIM：To investigate the relationship between polymorphisms present in the vitamin D receptor（VDR） gene and colorectal cancer risk,a systematic meta-analysis of population-based studies was performed.METHODS：A total of 38 relevant reports published between January 1990 and August 2010 were identified,...

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Published inWorld journal of gastroenterology : WJG Vol. 18; no. 14; pp. 1672 - 1679
Main Authors Bai, Yong-Heng, Lu, Hong, Hong, Dan, Lin, Cheng-Cheng, Yu, Zhen, Chen, Bi-Cheng
Format Journal Article
LanguageEnglish
Published United States Baishideng Publishing Group Co., Limited 14.04.2012
Subjects
Brief
Colorectal Neoplasms - genetics
Genetic Predisposition to Disease
Genotype
Humans
Odds Ratio
Polymorphism, Genetic
Receptors, Calcitriol - genetics
Risk Factors
VDR
危险
基因多态性
大肠癌
第2外显子
系统
结直肠癌
维生素D受体
Vitamin D receptor
Colorectal cancer
Meta-analysis
Polymorphism
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Summary:AIM：To investigate the relationship between polymorphisms present in the vitamin D receptor（VDR） gene and colorectal cancer risk,a systematic meta-analysis of population-based studies was performed.METHODS：A total of 38 relevant reports published between January 1990 and August 2010 were identified,of which only 23 qualified for this meta-analysis based on our selection criteria.Five polymorphic variants of the VDR gene,including Cdx-2（intron 1e） and FokI（exon 2） present in the 5＇ region of the gene,and BsmI（intron 8）,ApaI（intron 8）,and TaqI（exon 9） sites present in the 3＇ untranslated region（UTR）,were evaluated for possible associations with colorectalcancer risk.Review manager 4.2 was used to perform statistical analyses.RESULTS：In the meta-analysis performed,only the BsmI polymorphism was found to be associated with colorectal cancer risk.In particular,the BsmI B genotype was found to be related to an overall decrease in the risk for colorectal cancer [BB vs bb：odds ratio（OR） = 0.87,95% CI：0.80-0.94,P = 3 × 10-4;BB vs Bb ＋ bb：OR = 0.90,95% CI：0.84-0.97,P = 5 × 10-4].Moreover,in subgroup analyses,the BsmI B genotype was significantly associated with colon cancer,and not rectal cancer.An absence of between-study heterogeneity was also observed.CONCLUSION：A meta-analysis of 23 published studies identified the BsmI polymorphism of the VDR gene to be associated with an increased risk of colon cancer.
Bibliography:14-1219/R
Vitamin D receptor; Polymorphism; Metaanalysis; Colorectal cancer
AIM：To investigate the relationship between polymorphisms present in the vitamin D receptor（VDR） gene and colorectal cancer risk,a systematic meta-analysis of population-based studies was performed.METHODS：A total of 38 relevant reports published between January 1990 and August 2010 were identified,of which only 23 qualified for this meta-analysis based on our selection criteria.Five polymorphic variants of the VDR gene,including Cdx-2（intron 1e） and FokI（exon 2） present in the 5＇ region of the gene,and BsmI（intron 8）,ApaI（intron 8）,and TaqI（exon 9） sites present in the 3＇ untranslated region（UTR）,were evaluated for possible associations with colorectalcancer risk.Review manager 4.2 was used to perform statistical analyses.RESULTS：In the meta-analysis performed,only the BsmI polymorphism was found to be associated with colorectal cancer risk.In particular,the BsmI B genotype was found to be related to an overall decrease in the risk for colorectal cancer [BB vs bb：odds ratio（OR） = 0.87,95% CI：0.80-0.94,P = 3 × 10-4;BB vs Bb ＋ bb：OR = 0.90,95% CI：0.84-0.97,P = 5 × 10-4].Moreover,in subgroup analyses,the BsmI B genotype was significantly associated with colon cancer,and not rectal cancer.An absence of between-study heterogeneity was also observed.CONCLUSION：A meta-analysis of 23 published studies identified the BsmI polymorphism of the VDR gene to be associated with an increased risk of colon cancer.
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Correspondence to: Bi-Cheng Chen, MD, Wenzhou Key Laboratory of Surgery, The First Affiliated Hospital of Wenzhou Medical College, 2# Fuxue Lane, Wenzhou 325000, Zhejiang Province, China. wzlab@hotmail.com
Telephone: +86-577-88069338 Fax: +86-577-88069519
Author contributions: Bai YH and Chen BC conceived the study, designed and coordinated it, performed data analysis and wrote the manuscript; Lu H, Hong D and Lin CC participated in searching medical literature; Yu Z performed data analysis; all authors read and approved the final manuscript.
ISSN:1007-9327
2219-2840
DOI:10.3748/wjg.v18.i14.1672