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Frequencies of glutathione S-transferase A1 rs3957357 polymorphism in a Turkish population. JOURNAL OF SURGERY AND MEDICINE 2021. [DOI: 10.28982/josam.871071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ding F, Li JP, Zhang Y, Qi GH, Song ZC, Yu YH. Comprehensive Analysis of the Association Between the rs1138272 Polymorphism of the GSTP1 Gene and Cancer Susceptibility. Front Physiol 2019; 9:1897. [PMID: 30740061 PMCID: PMC6355699 DOI: 10.3389/fphys.2018.01897] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 12/18/2018] [Indexed: 12/26/2022] Open
Abstract
Background: We obtained conflicting results regarding the relationship between the genetic role of the rs1138272 C/T polymorphism of the GSTP1 (Glutathione S-Transferase pi) gene and the risk of various cancers. Methods: Using the presently available data, a meta-analysis was conducted to comprehensively evaluate the genetic relationship between the GSTP1 rs1138272 polymorphism and cancer susceptibility. Results: A total of 43 studies including 15,688 cases and 17,143 controls were recruited into our quantitative synthesis. In the overall population, we observed an increased risk of overall cancer cases, compared with unrelated controls, in the genetic models of allele T vs. allele C (P-association = 0.007, OR = 1.17), carrier T vs. carrier C (P-association = 0.035, OR = 1.11), TT vs. CC (P-association = 0.002, OR = 1.45), TT vs. CC+CT (P-association = 0.009, OR = 1.42), and CT+TT vs. CC (P-association = 0.027, OR = 1.13). We detected similar positive results within the Asian population. Additionally, there was a significant increase in the incidence of cancer for Africans under all genetic models (all P-association < 0.05, OR > 1). When targeting the Caucasian population, we detected a positive association with the TT vs. CC and TT vs. CC+CT models in the “Colorectal cancer” (P-association < 0.05, OR < 1) and “Head and neck cancer” (P-association < 0.05, OR > 1) subgroups. For the “Lung cancer” subgroup, we observed a slightly increased risk in Caucasians under the models of allele T vs. allele C, carrier T vs. carrier C, CT vs. CC, and CT+TT vs. CC (P-association < 0.05, OR > 1). Conclusion: The TT genotype of the GSTP1 rs1138272 polymorphism is likely related to the susceptibility to overall cancer in the Asian and African populations and, specifically, “Colorectal” and “Head and neck” cancers in the Caucasian population. In addition, the CT genotype of the GSTP1 rs1138272 polymorphism may be linked to the risk of lung cancer in Caucasians. Additional evidence is required to confirm this conclusion.
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Affiliation(s)
- Fei Ding
- Department of Radiation Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Shandong University, Jinan, China.,Second Department of Oncology, The First Hospital of Zibo, Zibo, China
| | - Jin-Ping Li
- Department of Public Health, The First Hospital of Zibo, Zibo, China
| | - Yong Zhang
- Department of Radiation Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Shandong University, Jinan, China.,Shandong Academy of Medical Sciences, Jinan, China
| | - Guang-Hui Qi
- Department of Urology Surgery, The First Hospital of Zibo, Zibo, China
| | - Zhi-Chao Song
- Department of Anorectal Surgery, The First Hospital of Zibo, Zibo, China
| | - Yong-Hua Yu
- Department of Radiation Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Shandong University, Jinan, China.,Shandong Academy of Medical Sciences, Jinan, China
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Wang S, Zhang J, Jun F, Bai Z. Glutathione S-transferase pi 1 variant and squamous cell carcinoma susceptibility: a meta-analysis of 52 case-control studies. BMC MEDICAL GENETICS 2019; 20:22. [PMID: 30665373 PMCID: PMC6340173 DOI: 10.1186/s12881-019-0750-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 01/11/2019] [Indexed: 12/15/2022]
Abstract
Background There are several meta-analyses on the genetic relationship between the rs1695 polymorphism within the GSTP1 (glutathione S-transferase pi 1) gene and the risk of different SCC (squamous cell carcinoma) diseases, such as ESCC (oesophageal SCC), HNSCC (head and neck SCC), LSCC (lung SCC), and SSCC (skin SCC). Nevertheless, no unified conclusions have been drawn. Methods Herein, an updated meta-analysis was performed to evaluate the probable impact of GSTP1 rs1695 on the susceptibility to different SCC diseases under six genetic models (allele, carrier, homozygote, heterozygote, dominant, and recessive). Three online databases, namely, PubMed, WOS (Web of Science), and Embase (Excerpta Medica Database), were searched. Results Initially, we obtained a total of 497 articles. Based on our selection criteria, we eventually included 52 case-control studies (9763 cases/15,028 controls) from 47 eligible articles. As shown in the pooling analysis, there was no difference in the risk of overall SCC disease between cases and controls [allele, Pa (P value of association test) = 0.601; carrier, Pa = 0.587; homozygote, Pa = 0.689; heterozygote, Pa = 0.167; dominant, Pa = 0.289; dominant, Pa = 0.548]. Similar results were obtained after stratification by race (Asian/Caucasian), genotyping, control source, and disease type (ESCC/HNSCC/LSCC/SSCC) (all Pa > 0.05). Conclusion The rs1695 polymorphism within the GSTP1 gene is not associated with the risk of overall SCC or a specific SCC type, including ESCC, HNSCC, LSCC, and SSCC.
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Affiliation(s)
- Shuang Wang
- Department of Plastic and Burn Surgery, Tianjin First Center Hospital, Tianjin, 300192, China
| | - Jingqi Zhang
- Department of Plastic and Burn Surgery, Tianjin First Center Hospital, Tianjin, 300192, China
| | - Fan Jun
- Department of Plastic and Burn Surgery, Tianjin First Center Hospital, Tianjin, 300192, China
| | - Zhijie Bai
- Department of Urology Surgery, Tianjin First Center Hospital, Tianjin, 300192, China.
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He F, Liu C, Zhang R, Hao Z, Li Y, Zhang N, Zheng L. Association between the Glutathione-S-transferase T1 null genotype and esophageal cancer susceptibility: a meta-analysis involving 11,163 subjects. Oncotarget 2018; 9:15111-15121. [PMID: 29599931 PMCID: PMC5871102 DOI: 10.18632/oncotarget.24534] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 09/21/2017] [Indexed: 02/07/2023] Open
Abstract
Background Glutathione-S-Transferase T1 (GSTT1) null genotype has been shown to be associated with the risk of esophageal cancer. However, the results remain inconsistent. Thus a comprehensive meta-analysis was conducted to assess the strength of association between GSTT1 null genotype and the risk of esophageal cancer. Materials and Methods A literature search of PubMed, Embase, China National Knowledge Infrastructure (CNKI) and Wanfang databases up to March 31, 2017 was conducted and 30 eligible articles with 4482 cases and 6681 controls were finally recruited. The strength of correlation between GSTT1 polymorphism and the susceptibility of esophageal cancer was assessed by the crude odds ratios (ORs) with 95% confidence intervals (CIs). Subgroup analyses and sensitivity analyses were performed to further identify the association. Results GSTT1 null genotype significantly increased the risk of esophageal cancer (OR = 1.20; 95% CI 1.04-1.40; P < 0.05). In a subgroup analysis by ethnicity, GSTT1 null genotype was correlated with a significantly increased risk of esophageal cancer among Asians (OR = 1.33; 95% CI 1.12-1.58; P < 0.05), instead of Caucasians or Africans (OR = 0.91; 95% CI 0.65-1.26; P > 0.05 for Caucasians and OR = 1.32; 95% CI 0.98-1.77; P > 0.05 for Africans). In the analysis by histological type, GSTT1 null genotype was correlated with a significantly increased risk of esophageal squamous cell carcinoma (OR = 1.34; 95% CI 1.12-1.61; P < 0.05), particularly among Asians (OR = 1.54; 95% CI 1.30-1.82; P < 0.05), but not among Caucasians or Africans (OR = 0.87; 95% CI 0.48-1.57; P > 0.05 for Caucasians and OR = 1.32; 95% CI 0.98-1.77; P > 0.05 for Africans). In addition, there is no significant correlation between GSTT1 null genotype and the risk of esophageal adenocarcinoma (OR = 0.98; 95% CI 0.71-1.35; P > 0.05). Conclusions Our findings demonstrate that GSTT1 null genotype significantly increases esophageal cancer risk, particularly in Asians.
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Affiliation(s)
- Feng He
- Department of Thoracic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Changyu Liu
- Department of Thoracic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Ruijie Zhang
- Department of Thoracic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Zhipeng Hao
- Department of Thoracic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yangkai Li
- Department of Thoracic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Ni Zhang
- Department of Thoracic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Liang Zheng
- Department of Thoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
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Ma L, Lan B, Guo L, Nong S, Huang C, Wu Q, Huang Z. GSTM1 and GSTT1 Gene Polymorphisms, Gene-Gene Interaction, and Esophageal Carcinoma Risk: Evidence from an Updated Meta-Analysis. Genet Test Mol Biomarkers 2018; 22:11-19. [PMID: 29215312 DOI: 10.1089/gtmb.2017.0137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Liping Ma
- Department of Clinical Laboratory, Affiliated Minzu Hospital of Guangxi Medical University, Nanning, China
| | - Biyang Lan
- Department of General Surgery, Guangxi Minzu Hospital, Affiliated Minzu Hospital of Guangxi Medical University, Nanning, China
| | - Lingxiao Guo
- Department of Clinical Laboratory, Affiliated Minzu Hospital of Guangxi Medical University, Nanning, China
| | - Shaoyun Nong
- Department of Clinical Laboratory, Affiliated Minzu Hospital of Guangxi Medical University, Nanning, China
| | - Cuibo Huang
- Department of Clinical Laboratory, Affiliated Minzu Hospital of Guangxi Medical University, Nanning, China
| | - Qiulong Wu
- Department of Clinical Laboratory, Affiliated Minzu Hospital of Guangxi Medical University, Nanning, China
| | - Zhihu Huang
- Department of Clinical Laboratory, Affiliated Minzu Hospital of Guangxi Medical University, Nanning, China
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Broekman MMTJ, Wong DR, Wanten GJA, Roelofs HM, van Marrewijk CJ, Klungel OH, Verbeek ALM, Hooymans PM, Guchelaar HJ, Scheffer H, Derijks LJJ, Coenen MJH, de Jong DJ. The glutathione transferase Mu null genotype leads to lower 6-MMPR levels in patients treated with azathioprine but not with mercaptopurine. THE PHARMACOGENOMICS JOURNAL 2017; 18:160-166. [PMID: 28045129 DOI: 10.1038/tpj.2016.87] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 11/07/2016] [Accepted: 11/14/2016] [Indexed: 12/21/2022]
Abstract
The conversion of azathioprine (AZA) to mercaptopurine (MP) is mediated by glutathione transferase Mu1 (GSTM1), alpha1 (GSTA1) and alpha2 (GSTA2). We designed a case-control study with data from the TOPIC trial to explore the effects of genetic variation on steady state 6-methylmercaptopurine ribonucleotide (6-MMPR) and 6-thioguanine nucleotide (6-TGN) metabolite levels. We included 199 patients with inflammatory bowel disease (126 on AZA and 73 on MP). GSTM1-null genotype carriers on AZA had two-fold lower 6-MMPR levels than AZA users carrying one or two copies of GSTM1 (2239 (1006-4587) versus 4371 (1897-7369) pmol/8 × 108 RBCs; P<0.01). In patients on MP (control group) 6-MMPR levels were comparable (6195 (1551-10712) versus 6544 (1717-11600) pmol/8 × 108 RBCs; P=0.84). The 6-TGN levels were not affected by the GSTM1 genotype. The presence of genetic variants in GSTA1 and GSTA2 was not related to the 6-MMPR and 6-TGN levels.
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Affiliation(s)
- M M T J Broekman
- Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Department of Gastroenterology, Nijmegen, The Netherlands
| | - D R Wong
- Department of Clinical Pharmacy, Pharmacology and Toxicology, Zuyderland Medical Center, Sittard-Geleen, The Netherlands
| | - G J A Wanten
- Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Department of Gastroenterology, Nijmegen, The Netherlands
| | - H M Roelofs
- Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Department of Gastroenterology, Nijmegen, The Netherlands
| | - C J van Marrewijk
- Radboud University Medical Center, Radboud Institute for Health Sciences, Department of Human Genetics, Nijmegen, The Netherlands
| | - O H Klungel
- Department of Pharmacoepidemiology and Pharmacotherapy, Utrecht University, Utrecht, The Netherlands
| | - A L M Verbeek
- Radboud University Medical Center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands
| | - P M Hooymans
- Department of Clinical Pharmacy, Pharmacology and Toxicology, Zuyderland Medical Center, Sittard-Geleen, The Netherlands
| | - H-J Guchelaar
- Department of Clinical Pharmacy and Toxicology, Leiden University Medical Center, Leiden, The Netherlands
| | - H Scheffer
- Radboud University Medical Center, Radboud Institute for Health Sciences, Department of Human Genetics, Nijmegen, The Netherlands
| | - L J J Derijks
- Department of Clinical Pharmacy, Máxima Medical Center, Veldhoven, The Netherlands
| | - M J H Coenen
- Radboud University Medical Center, Radboud Institute for Health Sciences, Department of Human Genetics, Nijmegen, The Netherlands
| | - D J de Jong
- Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Department of Gastroenterology, Nijmegen, The Netherlands
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Lu QJ, Bo YC, Zhao Y, Zhao EJ, Sapa WB, Yao MJ, Duan DD, Zhu YW, Lu WQ, Yuan L. Glutathione S-transferase M1 polymorphism and esophageal cancer risk: An updated meta-analysis based on 37 studies. World J Gastroenterol 2016; 22:1911-1918. [PMID: 26855551 PMCID: PMC4724623 DOI: 10.3748/wjg.v22.i5.1911] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 10/06/2015] [Accepted: 11/13/2015] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the relationship between glutathione S-transferase M1 (GSTM1) polymorphism and susceptibility to esophageal cancer (EC).
METHODS: A comprehensive search of the United States National Library of Medicine PubMed database and the Elsevier, Springer, and China National Knowledge Infrastructure databases for all relevant studies was conducted using combinations of the following terms: “glutathione S-transferase M1”, “GSTM1”, “polymorphism”, and “EC” (until November 1, 2014). The statistical analysis was performed using the SAS software (v.9.1.3; SAS Institute, Cary, NC, United States) and the Review Manager software (v.5.0; Oxford, England); crude odds ratios (ORs) with 95% confidence intervals (CIs) were used to assess the association between the GSTM1 null genotype and the risk of EC.
RESULTS: A total of 37 studies involving 2236 EC cases and 3243 controls were included in this meta-analysis. We observed that the GSTM1 null genotype was a significant risk factor for EC in most populations (OR = 1.33, 95%CI: 1.12-1.57, Pheterogeneity < 0.000001, and I2 = 77.0%), particularly in the Asian population (OR = 1.53, 95%CI: 1.26-1.86, Pheterogeneity < 0.000001, and I2 = 77.0%), but not in the Caucasian population (OR = 1.02, 95%CI: 0.87-1.19, Pheterogeneity = 0.97, and I2 = 0%).
CONCLUSION: The GSTM1 null polymorphism may be associated with an increased risk for EC in Asian but not Caucasian populations.
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Abstract
Esophageal cancer (EC) is one of the most common malignancies in low- and medium-income countries and represents a disease of public health importance because of its poor prognosis and high mortality rate in these regions. The striking variation in the prevalence of EC among different ethnic groups suggests a significant contribution of population-specific environmental and dietary factors to susceptibility to the disease. Although individuals within a demarcated geographical area are exposed to the same environment and share similar dietary habits, not all of them will develop the disease; thus genetic susceptibility to environmental risk factors may play a key role in the development of EC. A wide range of xenobiotic-metabolizing enzymes are responsible for the metabolism of carcinogens introduced via the diet or inhaled from the environment. Such dietary or environmental carcinogens can bind to DNA, resulting in mutations that may lead to carcinogenesis. Genes involved in the biosynthesis of these enzymes are all subject to genetic polymorphisms that can lead to altered expression or activity of the encoded proteins. Genetic polymorphisms may, therefore, act as molecular biomarkers that can provide important predictive information about carcinogenesis. The aim of this review is to discuss our current knowledge on the genetic risk factors associated with the development of EC in different populations; it addresses mainly the topics of genetic polymorphisms, gene-environment interactions, and carcinogenesis. We have reviewed the published data on genetic polymorphisms of enzymes involved in the metabolism of xenobiotics and discuss some of the potential gene-environment interactions underlying esophageal carcinogenesis. The main enzymes discussed in this review are the glutathione S-transferases (GSTs), N-acetyltransferases (NATs), cytochrome P450s (CYPs), sulfotransferases (SULTs), UDP-glucuronosyltransferases (UGTs), and epoxide hydrolases (EHs), all of which have key roles in the detoxification of environmental and dietary carcinogens. Finally, we discuss recent advances in the study of genetic polymorphisms associated with EC risk, specifically with regard to genome-wide association studies, and examine possible challenges of case-control studies that need to be addressed to better understand the interaction between genetic and environmental factors in esophageal carcinogenesis.
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Affiliation(s)
- Marco Matejcic
- a International Centre for Genetic Engineering and Biotechnology, Cape Town Component , Observatory , Cape Town , South Africa , and
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Makhdoomi MA, Shah IA, Bhat GA, Amin S, Lone MM, Islami F, Dar NA. Association between GSTM1 and GSTT1 polymorphisms and esophageal squamous cell carcinoma: results from a case-control study in Kashmir, India. Tumour Biol 2014; 36:2613-9. [PMID: 25432134 DOI: 10.1007/s13277-014-2882-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 11/19/2014] [Indexed: 12/30/2022] Open
Abstract
Polymorphisms in glutathione-S-transferases (GSTs), the phase II xenobiotic detoxifying enzymes, have been associated with increased cancer risk. In this study, we assessed the association of functional polymorphisms in GSTM1 and GSTT1 with esophageal cancer in Kashmir, India, an area with a high incidence of esophageal squamous cell carcinoma (ESCC). We analyzed genotypes of GSTM1 and GSTT1 using a multiplex PCR in 492 pairs of ESCC cases and individually matched controls. The associations between polymorphisms in these genes and ESCC risk were examined by conditional logistic regression models adjusted for multiple potential confounders. In addition, the interaction between these genes and several environmental exposures with regard to ESCC risk was assessed. Our results showed an association between the GSTT1 null genotype and ESCC risk (odds ratio (OR) = 1.58; 95% confidence interval (CI) 1.04-2.39). Although GSTM1 alone was not associated with ESCC risk, individuals with the GSTM1 (-)/GSTT1 (+) genotype showed an inverse relation with ESCC risk (OR = 0.55; 95% CI 0.32-0.93), compared to GSTM1 (+)/GSTT1 (+) individuals. We found a significant interaction between the GSTT1 and GSTM1 genotypes with regard to ESCC risk (P = 0.001); however, there were no interactions between environmental factors and GSTT1 and GSTM1 genotypes. This study indicates that GSTT1 null genotype is associated with ESCC risk in Kashmiri population. The association between GSTM1 and ESCC risk needs further investigations. Interactions of these genotypes with environmental exposures should be examined in multicentric studies with bigger sample sizes.
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Tan X, Chen M. Association between glutathione S-transferases P1 Ile105Val polymorphism and susceptibility to esophageal cancer: evidence from 20 case-control studies. Mol Biol Rep 2014; 42:399-408. [PMID: 25280543 DOI: 10.1007/s11033-014-3781-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Accepted: 09/24/2014] [Indexed: 02/06/2023]
Abstract
Available epidemiological studies had estimated the correlation between glutathione S-transferases P1 (GSTP1) Ile105Val polymorphism and esophageal cancer (EC) risk. However, the conclusions were controversial and inconclusive. An updated meta-analysis was conducted to explore whether GSTP1 polymorphism could be contributed to the EC risk. Ultimately, a total of 2,992 cases and 4,758 controls from 20 previous studies were included. Crude odds ratios (ORs) with 95 % confidence intervals (95 % CIs) were used to assess the strength of the associations. Pooled results suggested that GSTP1 Ile105Val polymorphism significantly increased the risk of developing EC in Caucasians under three genetic models (G vs. A, OR 1.146, 95 % CI 1.031-1.275, P = 0.012, I(2) = 30.40 %; GA vs. AA, OR 1.208, 95 % CI 1.036-1.408, P = 0.016, I(2) = 50.30 %; GG+GA vs. AA, OR 1.219, 95 % CI 1.053-1.410, P = 0.008, I(2) = 44.50 %). However, no significant correlation was found in Asians, African and mixed ethnicities analyses. Moreover, similar results were detected for any genetic model in esophageal squamous cell carcinoma and esophageal adenocarcinoma when stratifying for pathologic types. This meta-analysis provides new evidences that GSTP1 Ile105Val gene polymorphism contributes to EC susceptibility in Caucasians.
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Affiliation(s)
- Xiang Tan
- Department of Cardiothoracic Surgery, First Affiliated Hospital, Guangxi Medical University, Nanning, Guangxi, China,
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GST Theta null genotype is associated with an increased risk for ulcerative colitis: a case-control study and meta-analysis of GST Mu and GST Theta polymorphisms in inflammatory bowel disease. J Hum Genet 2014; 59:575-80. [PMID: 25186055 DOI: 10.1038/jhg.2014.77] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 08/06/2014] [Accepted: 08/11/2014] [Indexed: 01/30/2023]
Abstract
Glutathione S-transferases (GSTs) are important in the detoxification of many compounds, including reactive oxygen species. Polymorphisms in GSTs resulting in a decreased enzyme activity might enhance the risk for inflammatory bowel disease by eliciting a state of oxidative stress. Previous case-control studies showed divergent results and were frequently limited in sample size; therefore we conducted a meta-analysis including results from our case-control study. For the case-control study, we genotyped 552 patients with Crohn's disease (CD), 223 patients with ulcerative colitis (UC) and 972 healthy controls by PCR for functional deletions in GST Mu and GST Theta. Both were not analyzed in recent genome-wide association studies. For the meta-analysis, PubMed, EMBASE and Web of Science were searched. In this meta-analysis, we show an enhanced susceptibility for UC in individuals with the GSTT1null genotype (odds ratio (OR) 2.27, 95% confidence interval (CI) 1.31-3.92). In our case-control study, a reduced risk for CD was seen with the GSTT1null genotype (OR 0.58, 95% CI 0.43-0.77); however, pooled analysis showed an OR of 1.67, 95% CI 0.81-3.45. In this meta-analysis, we showed an increased risk for UC in individuals with the GSTT1null genotype.
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