中国南方粤语方言地区汉族人群GSTM1、GSTT1基因多态性

背景与目的:了解谷胱甘肽-S-转移酶M1、T1(GSTM1、GSTT1)基因多态性在中国南方粤语方言地区健康人群中的分布规律,初步探讨其与人群某些疾病家族史之间的关系。材料与方法:根据研究目的在广东省新兴县和广东省广州市两个地区选择符合条件的健康人群606人作为研究对象。应用聚合酶链式反应-2%琼脂糖凝胶电泳的方法检测调查对象GSTM1、GSTT1基因型。结果:在调查人群中,GSTM1基因纯合缺失基因型GSTM1(-/-)的出现频率为56.8%(n=597);GSTT1基因纯合缺失基因型GSTT1(-/-)的出现频率为42.1%(n=579);两基因联合缺失的频率为22.8%(n=570)。结论:GSTM1与GSTT1基因之间在人群中分布相互独立,无连锁现象,GSTM1基因在两个不同地区来源人群中的分布有显著差异。GSTT1在人群中不同基因型的分布与研究人群中冠心病疾病家族史的发生之间显著关联,有冠心病家族史人群GSTT1缺失基因型的表达显著增加。     

GSTM1、GSTT1基因多态性与四川北部地区肺癌易感性关系的研究

目的:探讨谷胱苷肽硫转移酶M1(GSTM1)和T1(GSTT1)基因多态性与四川北部地区汉族人群肺癌易感性的关系。方法:采用病例对照研究和聚合酶链式反应(PCR)技术检测四川北部地区肺癌病人125例和健康对照组125例中GSTM1(-)和GSTT1(-)的频率,评价两基因型及两基因的交互作用与肺癌易感性的关系。结果:GSTM1(-)在肺癌组和对照组分布频率分别为58.4%和56.8%,单因素回归分析未见统计学差异(OR=1.06,95%CI:0.639-1.757,P=0.822);GSTT1(-)在肺癌组和对照组分布频率分别为45.6%和44.8%,单因素回归分析未见统计学差异(OR=0.968,95%CI:0.588-1.593,P=0.899),GSTM1(-)和GSTT1(-)联合并未增加肺癌风险(OR=1.084,95%CI:0.536-2.192,P=0.823)。结论:GSTM1及GSTT1各基因型单独或联合作用都不是四川北部地区汉族人群肺癌的风险因素。     

GSTT1基因多态性与中国四川汉族人群肺癌遗传易感性关系的研究

背景与目的GSTs可能参与机体致癌物的解毒反应，如保护个体免受吸烟的损害，因此GSTs基因多态性被认为是个体是否患癌的易感因素。本研究的目的是探讨GSTT1基因多念性与中国四川汉族人群肺癌遗传易感性的关系。方法采用病例对照和PCR—RFLP方法检测中国四川汉族人群肺癌患者150例和健康对照者152例的GSTT1基因缺失型的频率，并评价其与吸烟和肺癌遗传易感性的关系。结果①GSTT1（-）基因型在肺癌组和对照组分别为54．7％(82／150)和38．2％(58/152)．二者间比较有显著性差异(OR=1．681，95％CI=1，009～2．803，P=0．046)；②GSTT1(-)基因型患肺鳞癌(OR=2．969．95％CI=1．511～5．834。P=0．002)及肺腺癌(OR=2．095．95％CI=1．060～4．140，P=0．033)的风险性明显增加；③吸烟者中GSTT1(-)基因型者患肺癌的风险是GSTT1( )者的4．051倍；①GSTT1(-)基因型者中，吸烟者患肺癌的风险是不吸烟者的53．885倍；⑤吸烟≥20包年者中，GSTT1(-)基因型者患肺癌的风险是GSTT1( )者的4．296倍。结论①(GSTT1(-)基因型增加四川汉族人群患肺癌的风险性．特别是增加患肺鳞癌的风险；②GSTT1(-)基因型和吸烟之间存在交互作用，吸烟量越大且为GSTT1(-)基因型者则患肺癌的风险性越大。     

广西鼻咽癌患者解毒酶基因GSTM1和GSTT1缺失的研究

目的研究鼻咽癌高发区鼻咽癌患者对化学致癌物的遗传易感性。方法应用PCR技术,研究鼻咽癌患者与对照组健康者人体主要解毒酶谷胱甘肽硫转移酶(GST)M1(GSTM1)和GSTT1基因缺失多态性,估计其与鼻咽癌地区性高发的相关性。结果鼻咽癌高发区居民GSTM1或GSTT1缺失率偏高,分别为47.4%(64/135)和40.7%(55/135)。鼻咽癌患者GSTM1或GSTT1缺失率分别为61.5%(56/91)和59.3%(54/91),显著高于对照组(P<0.05,P<0.01)。特别是GSTM1和GSTT1两种基因双缺失者,在病例组与对照组间差异有极显著性(χ2=12.533,P=0.002)。结论鼻咽癌高发区人群及患者GSTM1和GSTT1高频联合缺失,可能为相应的环境致癌化学毒物遗传易感性和鼻咽癌患者的地区聚集原因。     

广西扶绥县肝癌高发家系谷胱甘肽转硫酶GSTM_1和GSTT_1基因多态性的研究

目的探讨广西扶绥县肝癌高发区壮族人群谷胱甘肽转硫酶GSTM1和GSTT1的基因多态性在肝癌家族聚集性中的作用,以及一级亲属与先证者之间HCC易感性的关系。方法采用病例-对照研究方法,收集21个广西扶绥县壮族肝癌家系76例,以及该地区21个对照家系68例,采用多重PCR技术和凝胶成像分析方法,对入选者GSTM1和GSTT1基因型进行检测,用ELISA法检测HBsAg,并将实验结果与临床资料相结合,进行统计学分析。结果①GSTM1基因空白型在肝癌家系组、对照家系组之间的频率分别为67.1%和36.8%(P=0.000);GSTT1基因空白型在肝癌家系组、对照家系组之间的频率分别为40.8%和19.1%(P=0.005);GSTM1和GSTT1基因同时缺失在肝癌家系组、对照家系组的频率分别为31.6%和2.9%(P=0.000)。②将GSTM1及GSTT1基因同时表达型为基准计算两基因联合作用的危险度,GSTM1基因缺失GSTT1基因表达型、GSTM1基因表达GSTT1基因缺失型、GSTM1基因及GSTT1基因联合缺失型的OR值分别为0.102、0.210和3.092。③GSTM1基因空白型在先证者与其直系亲属之间的频率分别为71.4%和65.5%(P=0.620),GSTT1基因空白型在先证者与其直系亲属之间的频率分别为47.6%和38.2%(P=0.454)。GSTM1和GSTT1基因同时缺失在先证者与其直系亲属之间的频率分别为33.3%和30.9%(P=0.839),差异均无统计学意义(P>0.05)。结论①GSTM1和GSTT1基因的多态性与肝癌家族聚集性相关;②GSTM1和GSTT1基因联合缺失与HCC的发生呈显著正相关,且两基因可能具有协同作用;③直系亲属与先证者HCC发生率无差别。     

广西扶绥人群GSTM1和GSTT1基因多态性与肝癌易感性关系的研究

目的:探讨GSTM1和GSTT1基因多态性与肝癌易感性关系,以及基因与基因间的相互作用.方法: 应用病例-对照分析研究,采用多重PCR技术,对广西扶绥100例肝细胞癌患者、60例正常人群的GSTM1和GSTT1基因型进行检测.将实验结果与临床资料结合进行统计学分析.结果: GSTM1基因空白型在HCC组和正常对照组中的频率分别为59.0%、68.3%(P>0.05);HCC组GSTT1基因缺失频率(33.0%)显著高于正常对照组(18.3%);GSTM1和GSTT1基因同时缺失在肝癌组和对照组中的频率分别为22.0%和3.3%,两者差异有统计学意义.结论:1)GSTM1和GSTT1基因的缺失是通过遗传获得.2)GSTT1基因缺失是HCC的易感因素.3)GSTM1和GSTT1基因联合缺失与HCC的发生呈显著正相关,且两基因具有协同作用,可作为HCC高危人群筛选的有用指标.     

E2钙黏蛋白基因3′2 U TR + 54C/ T 多态与 肺癌的发病风险

 目的　探讨CDH1 基因3′2 U TR + 54C/ T SNP 与中国北方人群肺癌遗传易感性的关系。方法 采用聚合酶链反应2限制性片段长度多态性( PCR2RFL P) 分析方法检测194 名肺癌患者和223 名健康对 照组3′2 U TR + 54C/ T SNP 的基因型。结果　肺癌患者组吸烟个体比例明显高于对照组,吸烟可增加 肺癌的发病风险(OR = 3. 03 ,95 %CI = 2. 03～4. 54) 。肺癌患者组C 等位基因频率(85. 6 %) 显著高于对 照组(76. 9 %) ,两组相比差异有统计学意义(χ2 = 10. 09 , P = 0. 00) ;肺癌患者组与对照组T/ T、T/ C 和 C/ C 基因型频率分别为1. 0 %、26. 8 %、72. 2 %和4. 0 %、38. 1 %、57. 8 % ,与T/ T 或T/ C 基因型相比,携 带C/ C 基因型可显著增加肺癌的发病风险(OR = 1. 89 ,95 %CI = 1. 25～2. 85) 。结论　CDH1 基因3′2 U TR + 54C/ C 基因型可能是中国北方人群肺癌发病的潜在危险因素。     

谷胱苷肽S转硫酶T1、M1和P1基因多态性与结直肠癌易感性的关系

目的研究谷胱苷肽S转硫酶T1、M1和P1(GSTT1、GSTM1和GSTP1)多态性与结直肠癌易感性的关系。方法在江苏省进行了1个病例—对照研究(结直肠癌患者315例,人群对照439例),调查研究对象的生活习惯,抽取静脉血,提取白细胞DNA,以多重PCR技术检测GSTT1和GSTM1基因缺失,PCR-RFLP技术检测GSTP1基因单核苷酸多态(第104密码子A→G)。结果①在结直肠癌组和正常组GSTT1和GSTM1基因缺失频率分别为55.24%、57.31%和72.70%、73.29%、差异无显著性。②在结直肠癌组GSTP1 A/A、A/G和G/G基因型分布频度分别为57.51%、36.74%和5.75%;对照组分别为63.70%、31.05%和5.25%,2组之间差异无显著性(χ2 MH=2.993,P=0.224)。与GSTP1 A/A基因型携带者相比,G/G基因型者发生结直肠癌的危险性无显著升高,其性别、年龄、吸烟、饮酒习惯调整后的OR为1.09(95%CI:0.79~1.51)。结论GSTT1、GSTM1基因缺失型和GSTP1 G/G基因型与结直肠癌的易感性无显著相关。     

Ⅱ相代谢酶基因多态性与广西肝癌发生的关系

目的　探讨Ⅱ相代谢酶谷胱甘肽硫转移酶M 1、T 1(GSTM 1、GSTT1)及微粒体环氧化物水解酶 (mEH )基因多态性与广西肝癌易感性的关系 ,以及基因与基因间的相互作用。方法　采用多重PCR、PCR RFLP技术 ,对广西地区 10 5例肝癌患者及 15 1例健康对照的GSTM 1、GSTT 1、mEH基因型进行检测。结果　GSTM 1基因缺失率在病例组与对照组中分别为 64 .76%和5 0 .99% ,两者比较有显著性差异 (P <0 .0 5 ,OR =1.77) ;病例组GSTT 1基因缺失率 (4 0 .95 % )高于对照组 (3 3 .11% ) ,mEH 3种基因型频率在病例组分别为 2 7.62 %、2 1.90 %、5 0 .48% ,对照组则分别为 2 1.19%、3 4.44 %、44 .3 7% ,两组比较无显著性差异 (P >0 .0 5 ) ;GSTM 1、T 1基因同时缺失的个体患肝癌的危险性增大了 1.2 2倍。结论　GSTM 1、T1基因同时缺失是肝癌的易感因素 ,可作为肝癌高危人群筛选的标记物。     

CYP1A1、GSTM1基因多态性及其联合作用与食管癌的易感性

目的探讨CYP1A1、GSTM1基因多态性及其联合作用与新疆汉族人食管癌易感性的关系。方法采用聚合酶链式反应-连接酶检测反应分析方法检测107例食管癌患者和204例非食管癌患者的CYP1A1(rs1048943、rs4646421和rs4646903)和GSTM1(缺失型和rs2071487)的基因型。结果CYP1A1基因rs1048943位点的等位基因和基因型频率在病例组和对照组之间比较,总体分布差异有统计学意义(χ² =5.52,P=0.019)。与A/A基因型相比,GG+AG基因型可增加食管癌的发病风险(OR=1.79,OR95%CI:1.10~2.92);GSTM1基因缺失型和非缺失型在病例组和对照组中的分布频率分别为68.69%、31.31%和48.39%、51.61%,在两组间的分布差异有统计学意义(χ²=10.55,P=0.001;OR=2.34,OR95%CI:1.40~3.91)。结论CYP1A1基因rs1048943位点多态性和GSTM1基因缺失型与新疆地区汉族人食管癌易感性有相关性。     

Genetic Polymorphisms of Xenobiotic Metabolizing Genes (GSTM1, GSTT1, GSTP1), Gene-Gene Interaction with Association to Lung Cancer Risk in North India; A Case Control Study

Aim: In this case control study involving, 220 human subjects; polymorphisms in xenobiotic metabolizing genes (GST-M1, -T1 and -P1) and their association to lung cancer risk is being analysed among smokers and non-smokers. GSTM1 or GSTT1 gene polymorphism and amino acid changes in GSTP1 have been correlated and may be associated to lung cancer risk. Other factor includes exposure to environmental pollutants and life style choices. We have explored gene-gene and gene-environment interaction in the aetiology of lung cancer risk among north Indian population. Patients and Methods: For the study we have collected 120 lung cancer patient blood samples from Kamala Nehru Memorial Cancer Hospital, Allahabad, Uttar Pradesh and 100 matched controls. DNA was isolated and GST-M1 and - T1 genotyping were assessed by multiplex PCR whereas the GSTP1 polymorphism was analysed using restriction fragment length polymorphism. The risk of lung carcinogenesis was assessed using logistic regression analysis calculating the odd ratio (OR) with 95% confidence interval (CI). Results: The risk of lung carcinogenesis was three fold higher for null GSTT1 (OR=3.045, 95%CI=1.750-5.301, p-value <0.001) genotype; whereas other two types; GSTM1 (OR= 1.342, 95% CI=0.788-2.284, p-value=0.270) and GSTP1 (OR=0.806, 95% CI=0.526-1.236, p-value=0.323) showed no association to lung cancer susceptibility respectively. Smokers diagnosed with lung cancer had more null genotypes for GSTT1 (OR=4.773, 95%CI=1.939-11.751, p<0.001). The ‘at risk’ genotype combination GSTM1 (null) /GSTT1 (null) (OR=1.76, 95%CI; 0.920-3.370, p-value=0.03) showed increased susceptibility to lung cancer risk. The genotype combination of GSTT1 (null)/GSTP1 (Ile/Ile) (p=0.009) was associated with increased lung cancer risk. Conclusion: The results of this study suggest that; GSTT1 null genotype were more susceptible for lung cancer risk and smoking increases the susceptibility for lung cancer several folds among the North Indian population. Gene-gene interaction for null genotypes of GSTM1 and GSTT1 were correlated with higher risk of having lung cancer.     

Lung cancer susceptibility and polymorphisms of glutathione-S-transferase genes in Hong Kong

OBJECTIVE: To study the potential role of genetic polymorphisms of glutathione-S-transferases GSTM1, GSTT1 and GSTP1 in susceptibility to lung cancer in Hong Kong Chinese. METHODS: 229 consecutive incident patients with a histological diagnosis of lung cancer from a regional hospital and 197 healthy population-based controls were recruited for this study between July 1999 and June 2001. Genetic polymorphisms of GSTT1 and GSTM1 were determined using PCR-based technique. RESULTS: The frequencies of GSTT1 and GSTM1 null genotypes were 51.8 and 59.4% in healthy controls and 63 and 54.7%, respectively, in lung cancer patients. GSTP1 Val105/Val105 genotype was found in only 1% of healthy controls. The risk for lung cancer with GSTT1 null genotype was significantly higher, adjusted odds ratio (OR) 1.69, 95% confidence interval (CI) 1.12-2.56, compared with those with the GSTT1 genotype; the increase in risk was found only in non-smokers. GSTM1 null genotype, combined GSTT1 and GSTM1 null genotype and GSTP1 Val105/Val105 genotype did not confer any increase risk for lung cancer. CONCLUSION: GSTT1 null genotype is associated with an increased risk for lung cancer in non-smoking Chinese in Hong Kong.     

Lack of Assocation of Glutathione S-transferase T1 Gene Null and Susceptibility to Lung Cancer in China: a Meta-analysis

Background: Variation in metabolic genes is regarded as an important factor in processes leading to cancer.However, the effect of GSTT1 null genotype is divergent in the form of lung cancer. Methods: Studies wereconducted at different research databases from 1990 to 2013 and the total odds ratio (OR) and 95% confidenceinterval (CI) were calculated for lung cancer. Review Manager 5.2 and STATE 12 are employed. Results: TotalOR value is calculated from 17 articles with 2,118 cases and 2,915 controls. We discovered no significant increasein lung cancer risk among subjects carrying GSTT1 null genotype [OR = 1.15; 95% CI 0.97-1.36] in this metaanalysis.Conclusion: The GSTT1 deletion polymorphism does not have a significant effect on the susceptibilityto lung cancer overall in China.     

肺癌患者GSTT1多态性分布及其与15号染色体畸变的关系

 目的分析肺癌患者与对照GSTT1基因型多态性分布差异,探讨GSTT1基因型多态性对15号染色体稳定性的影响以及该染色体与肺癌发生之间的关联。方法利用PCR技术分析了61例肺癌患者和46例对照的GSTT1基因型分布,以荧光原位杂交(FISH)技术分析了不同GSTT1基因型的14例肺癌患者和18例对照淋巴细胞15号染色体结构和数目畸变。结果GSTT1+基因型(+/+和+/0)和GSTT1缺失基因型(0/0)在肺癌患者和对照之间的分布无显著性差异;肺癌组GSTT1+基因型15号染色体结构畸变率显著高于对照组GSTT1+和GSTT10/0型(P<0.05),但肺癌组0/0基因型未表现这种关系;15号染色体非整倍体发生率在各组和各基因型之间未表现显著差异。结论GSTT1基因型多态性与肺癌风险、15号染色体的稳定性无显著相关,15号染色体结构畸变是肺癌的风险因素之一。     

四川北部地区肺癌病人GSTM1基因多态性分析

 【摘要】　目的　分析中国四川北部地区汉族肺癌人群谷胱苷肽硫转移酶M1（GSTM1）基因多态性。方法　采用聚合酶链反应（PCR）技术检测该地区125例肺癌患者GSTM1基因缺失频率,并与文献报道的其他地区人群及人种进行比较。结果　中国四川北部地区肺癌患者GSTM1纯合缺失基因型58.4 %（73／125）,其中纯和缺失率女性为62.5 %（20／32）,男性为56.9 %（53／93）;鳞状细胞癌56.1 %（32／57）,腺癌54.8 %（17／31）。与国内外文献报道比较,中国四川北部地区肺癌患者GSTM1基因缺失频率略高于欧美,但仅与土耳其、巴西非裔美国人和印度北部人群差异有统计学意义（P＜0.05）,与国内人群相近（P＞0.05）。结论　中国四川北部地区汉族肺癌人群GSTM1基因多态性未呈现显著的地域和人种特征。     

Glutathione S-transferase gene polymorphisms and risk of gastric cancer in a Chinese population

Aim: The potential role of GSTM1, GSTT1 and GSTP1 polymorphisms in risk of gastric cancer in Chinese was studied. Methods: We collected 194 gastric cancers by pathologic examination and 412 controls from southern China during January 2007 to January 2011. Genotyping was based upon duplex polymerase-chain-reaction withthe PCR-CTPP method. Results: Individuals carrying null GSTM1 and GSTT1 had 1.49 and 1.96 fold risk sof gastric cancer when compared with respective non-null genotypes. We also found a non-significant 37% excess risk of gastric cancer among carriers of GSTP1 1b/1b genotype when compared with 1a/1a genotype (OR=1.37, 95% CI=0.81-2.25). The combination of null/null GSTM1 and GSTT1 genotypes showed higher increased risk of gastric cancer (OR=3.17, 95% CI=1.68-4.21). Moreover, cancers in ever smokers and ever drinkers were observed to be strongly associated with null GSTM1 and GSTT1, and a significant cancer risk was observed in positive H.pylori infection individuals with null GSTT1. Conclusion: Our study provided evidence that genetic deletion of GSTM1 and GSTT1 may contribute to increased susceptibility to gastric cancer in our Chinese population, while the GSTP1a/b polymorphism may not.     

Associations of CYP1A1, GSTM1 and GSTT1 Polymorphisms with Lung Cancer Susceptibility in a Northern Indian Population

Background: Susceptibility to lung cancer has been shown to be modulated by inheritance of polymorphicgenes encoding cytochrome P450 1A1 (CYP1A1) and glutathione S transferases (GSTM1 and GSTT1), which areinvolved in the bioactivation and detoxification of environmental toxins. This might be a factor in the variation inlung cancer incidence with ethnicity. Materials and Methods: We conducted a case-control study of 218 northernIndian lung cancer patients along with 238 healthy controls, to assess any association between CYP1A1, GSTM1and GSTT1 polymorphisms, either separately or in combination, with the likelihood of development of Lungcancer in our population. Results: We observed a significant difference in the GSTT1 null deletion frequency in thispopulation when compared with other populations (OR=1.87, 95%CI: 1.25-2.80–0.73, P=0.002). However, GSTM1null genotype was found associated with lung cancer in the non-smoking subgroup. (P=0.170). Conclusions: Ourstudy showed the GSTT1 null polymorphism to be associated with smoking-induced lung cancer and the GSTM1null polymorphism to have a link with non-smoking related lung cancer.     

Association between glutathione S-transferase T1 null genotype and risk of lung cancer: a meta-analysis of 55 studies

The relationship between glutathione S-transferase T1 (GSTT1) gene polymorphism and the risk of lung cancer from the published reports are still conflicting. This study was conducted to evaluate the relationship between GSTT1 polymorphism and the risk of lung cancer. A comprehensive research was conducted through the databases, and 55 studies were recruited into this meta-analysis for the association of null genotype of GSTT1 with lung cancer susceptibility, consisting of 15,140 patients with lung cancer and 16,662 controls. There was a significant association between GSTT1 null genotype and lung cancer risk in the overall populations (OR?=?1.138, 95 % CI?=?1.032–1.255, P _{heterogeneity}?=?0.000, P?=?0.009). Furthermore, GSTT1 null genotype was associated with the lung cancer risk in Asians (OR?=?1.469, 95 % CI?=?1.228–1.757, P _{heterogeneity}?=?0.000, P?=?0.000). However, GSTT1 null genotype was not associated with the risk of lung cancer in Caucasians and Africans. In conclusion, GSTT1 null genotype is associated with the lung cancer in overall populations and in Asians.     

Glutathione-S-transferase (GSTM1, GSTT1) Null Phenotypes and Risk of Lung Cancer in a Korean Population

Purpose: The aim of this study was to evaluate any association of GSTM1 and GSTT1 null genotypes withthe risk of lung cancer in a South Korean population. Methods: We conducted a large-scale, population-basedcase-control study including 3,933 lung cancer cases and 1,699 controls. Genotypes of GSTM1 and GSTT1 weredetermined using real-time polymerase chain reaction. Results: In logistic regression analysis adjusted for age andsmoking, we did not find any association between GSTM1 or GSTT1 and LC risk in women. However, in men,the GSTM1 and GSTTI null genotypes were borderline associated with risk (OR=1.18, 95% CI=0.99-1.41 forGSTM1, OR=1.18, 95% CI=0.99-1.41 for GSTT1), and combined GSTM1 and GSTT1 null genotypes conferredan increased risk for LC in men (OR=1.39, 95% CI=1.08–1.78). The OR for the GSTT1 null genotype was greaterin subjects aged 55 years old or younger (OR=1.45, 95% CI=1.09-1.92 for men; OR=1.36, 95% CI=0.97–1.90for women), than in those over age 55 (OR=1.03, 95% CI=0.83-1.27 for men; OR=0.86, 95% CI=0.66–1.12 forwomen) in both genders (p for interaction <0.05). Conclusions: In the Korean population, the GSTM1 andGSTT1 null genotypes are risk factors for LC in men; the GSTT1 null genotype has a more prominent effecton LC risk in younger people (age 55 years and under) than in older individuals.     

The GSTT1 null genotype contributes to increased risk of prostate cancer in Asians: a meta-analysis

Background: Many studies have investigated the association between glutathione S-transferase T 1 (GSTT1)null genotype and risk of prostate cancer, but the impact of GSTT1 null genotype in Asians is still unclear owingto inconsistencies across results. Thie present meta-analysis aimed to quantify the strength of the associationbetween GSTT1 null genotype and risk of prostate cancer. Methods: We searched the PubMed, Embase andWangfang databases for studies of associations between the GSTT1 null genotype and risk of prostate cancer inAsians and estimated summary odds ratio (OR) with their 95% confidence interval (95% CI). Results: A totalof 11 case-control studies with 3,118 subjects were included in this meta-analysis, which showed the GSTT1null genotype to be significantly associated with increased risk of prostate cancer in Asians (random-effects OR= 1.49, 95% CI 1.15-1.92, P = 0.002), also after adjustment for heterogeneity (fixed-effects OR = 1.45, 95% CI1.23-1.70, P < 0.001). No evidence of publication bias was observed. Conclusions: This meta-analysis of availabledata suggested the GSTT1 null genotype does contribute to increased risk of prostate cancer in Asians.