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Erschienen in: Tumor Biology 1/2013

01.02.2013 | Research Article

X-ray repair cross-complementing group 1 Arg399Gln gene polymorphism and susceptibility to colorectal cancer:a meta-analysis

verfasst von: Fu-Ren Zeng, Yang Ling, Jie Yang, Xiao-Cai Tian, Xin Yang, Rong-Cheng Luo

Erschienen in: Tumor Biology | Ausgabe 1/2013

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Abstract

X-ray repair cross-complementing group 1 (XRCC1), a DNA repair enzyme, plays a crucial role in the base excision repair by generating a single nucleotide repair patch. It has been demonstrated that the XRCC1 Arg399Gln gene polymorphism was associated with variations in XRCC1 enzyme activity. The aim of this study was to quantitatively summarize the association between the XRCC1 Arg399Gln polymorphism and susceptibility to colorectal cancer (CRC). A comprehensive search of the PubMed, Embase, and China National Knowledge Infrastructure databases was conducted for studies on the association between the XRCC1 Arg399Gln polymorphism and CRC risk. Summary odds ratio (OR) with its corresponding 95 % confidence interval (95 %CI) was estimated, in a fixed-effects model or a random-effects model when appropriate, to assess the association. Totally, 26 case–control studies with 6,979 cases and 11,470 controls were included into this meta-analysis. The pooled results of total studies showed that the XRCC1 Arg399Gln polymorphism was significantly associated with increased risk of CRC in all genetic contrast models (ORA vs. G = 1.13, 95 %CI 1.03–1.23, P OR = 0.008; ORGln/Gln vs. Arg/Arg = 1.24, 95 %CI 1.04–1.46, P OR = 0.015; ORGln/Gln vs. Arg/Gln + Arg/Arg = 1.19, 95 %CI 1.03–1.38, P OR = 0.021; ORGln/Gln + Arg/Gln vs. Arg/Arg = 1.14, 95 %CI 1.02–1.28, P OR = 0.022), except for the additive contrast model (ORArg/Gln vs. Arg/Arg = 1.11, 95 %CI 0.99–1.25, P OR = 0.064). The statistically significant association between the XRCC1 Arg399Gln polymorphism and CRC risk was observed among studies with high quality and in Asians, but not in Caucasians. Sensitivity analyses by sequential omission of any individual studies further identified the significant association. Publication bias was inexistent in this meta-analysis. The meta-analysis suggests that the XRCC1 Arg399Gln polymorphism is associated with increased risk of CRC.
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Metadaten
Titel
X-ray repair cross-complementing group 1 Arg399Gln gene polymorphism and susceptibility to colorectal cancer:a meta-analysis
verfasst von
Fu-Ren Zeng
Yang Ling
Jie Yang
Xiao-Cai Tian
Xin Yang
Rong-Cheng Luo
Publikationsdatum
01.02.2013
Verlag
Springer Netherlands
Erschienen in
Tumor Biology / Ausgabe 1/2013
Print ISSN: 1010-4283
Elektronische ISSN: 1423-0380
DOI
https://doi.org/10.1007/s13277-012-0581-2

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