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。     

四川北部地区肺癌患者GSTT1基因多态性分析

目的:了解四川北部地区汉族肺癌人群GSTT1基因多态性状况,与其他地区人群人种进行比较。方法:采用聚合酶链式反应(PCR)技术检测该地区肺癌患者GSTT1基因缺失〔GSTT1(-)〕频率。结果:本地区肺癌患者GSTT1(-)频率为45%(45/100),其中纯和缺失率女性和男性分别为52.0%(13/25)和42.7%(32/75),χ2=0.660,P=0.417;鳞癌38.1%(16/42),腺癌48.0%(12/25),χ2=0.632,P=0.427;吸烟者44.4%(28/63),不吸烟者45.9%(17/37),χ2=0.021,P=0.884。结论:本地区肺癌患者GSTT1基因缺失频率高于欧美,与亚洲多中心研究结果类似,缺失频率与性别、病理类型及是否吸烟无关。     

中国人群GSTM1基因多态性与肺癌易感性的Meta分析

[目的]探讨中国人群中谷胱甘肽S-转移酶（GSTM1）基因多态性与肺癌易感性的关系。[方法]在Pubmed数据库、CNKI数据库、万方数据库、中国生物医学文献数据库（CBM）中查询文献,时间范围从各数据库建库至2014年5月。采用RevMan 5.1和SAS 9.1.3软件对国内外关于GSTM1基因多态性与肺癌易感性的研究进行合并效应值估计和异质性分析。[结果]37篇文献最终被纳入本次研究。Meta分析结果显示：GSTM1缺失基因型的中国人群患肺癌的风险明显增高（OR=1.45,95%CI：1.30～1.62）。亚组分析发现吸烟与非吸烟的中国人群中GSTM1缺失基因型患肺癌的风险分别为对照组的1.69倍（95%CI：1.39～2.07）和1.46倍（95%CI：1.17～1.82）。在病理类型的亚组分析中,GSTM1缺失基因型的中国人群患鳞状细胞肺癌的风险明显高于对照组（OR=1.35,95%CI：1.13～1.61）。[结论]GSTM1缺失基因型增加中国人群患肺癌的发病风险。     

云南籍几个正常人群间GSTM1基因多态性的比较研究

目的: 针对云南曲靖地区宣威县、富源县及非曲靖地区3组正常人群进行GSTM1基因型多态性的比较研究.方法:采用聚合酶链反应(Polymerase chain reaction,PCR)技术对相关人群进行基因型鉴定.结果:GSTM1纯合缺失基因型(0/0)的频率在宣威人群为63.6%(n＝33),富源人群为64.5%(n＝31),非曲靖人群为68.5%(n＝35).结论:GSTM1基因型多态性在3个正常人群中的分布情况均一.该研究为了解特定地区肺癌与外源物代谢解毒基因之间的可能联系提供了一些基础数据.     

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基因多态性与宫颈癌遗传易感性的关系

目的探讨GSTMI基因多态性与宫颈癌遗传易感性的关系。方法采用多重PCR技术分析130例经病理确诊的宫颈癌病人（病例组）和130例同一地区的健康汉族妇女（对照组）的GSTMI基因型。结果宫颈癌病例组的GSTM1基因纯合缺失率（59．2％）高于对照组（43．9％）差别有显著的统计学意义（x^2=4．986，P=0．026）；GSTM1基因型在各年龄组间分布无差异。结论GSTM1基因纯合缺失能增加宫颈癌发生的危险性，GSTM1基因多态性与宫颈癌遗传易感性密切相关，GSTM1基因纯合缺失是先天遗传而非突变造成的。     

应用SYBR green Ⅰ荧光PCR研究GSTM1基因多态性与肺癌遗传易感性之间的相关性

背景与目的谷胱甘肽S转移酶M1(glutathione S-transferase M1,GSTM1)基因是参与体内多种致癌物代谢的重要的II相代谢酶,其基因多态性被认为与人肺癌遗传易感性有关。本研究旨在探讨天津地区汉族人群GSTM1基因多态性与肺癌遗传易感性之间的关系。方法采用SYBR green I实时荧光PCR熔解曲线分析方法检测天津地区265例肺癌患者和307例对照者GSTM1基因多态性,应用病例对照研究分析其与肺癌易感性及不同病理类型之间的关系。结果①GSTM1(-)基因型在肺癌组和对照组的分布频率分别为56.6%和57.0%,两组之间无统计学差别(χ2=0.831,P=0.362)。经性别、年龄、吸烟状况调整后分析,携带GSTM1(-)基因型个体未增加患肺癌危险性(OR=0.840,95%CI:0.578-1.221,P=0.362)。②按病理分层分析GSTM1基因型与肺癌各病理类型之间的关系,其中鳞癌、腺癌、小细胞肺癌与其它病理类型肺癌患者GSTM1(-)基因型分布频率分别为65.8%、48.5%、47.8%和52.2%,与对照组相比,不同病理类型患者肺癌危险性均无明显统计学差异(P0.05)。结论在天津地区人群中GSTM1基因多态性与肺癌遗传易感性之间无相关性。     

广西壮族人群GSTM1和GSTT1基因多态性与肺癌易感性关系的研究

[目的]探讨广西壮族人群谷胱甘肽硫转移酶（glutathione S-transferase,GST）中的GSTM1和GSTT1基因多态性与肺癌易感性的关系。[方法]以病例对照研究方法,采用聚合酶链式反应（PCR）分别检侧58例肺癌患者和60例健康对照的GSTM1、GSTT1基因多态性;χ2检验分析各种基因型频率在肺癌组和对照组之间的差异;用Logistic回归分析吸烟与GSTM1、GSTT1基因型多态性的联合作用。[结果]单独分析GSTM1、GSTT1基因多态性与肺癌相关性无统计学意义,而两者联合则与肺癌有相关性（χ2=4.085,P=0.043）。吸烟与GSTM1缺陷型基因对肺癌易感有协同作用,OR为3.778（95%CI：1.170～12.194,P=0.026）;吸烟与GSTT1缺陷型基因对肺癌易感无协同作用,OR为2.833（95%CI：0.982～8.173）。[结论]GSTM1、GSTT1的单一基因多态性不增加患肺癌的危险,而两者联合作用时可增加患肺癌的风险。GSTM1缺陷型有吸烟行为的人更易患肺癌。     

GST基因多态性与儿童急性淋巴细胞白血病关联Meta分析

目的：探讨2个常见谷胱甘肽硫转移酶（glutathioneS-transferase,GST）GSTM1和GSTT1基因多态性与儿童急性淋巴细胞白血病（acutelymphoblasticleukemia,ALL）易感性的关系。方法：检索PubMed、EMBase、CBM、CNKI、VIP和万方数据平台从建库到2013-10-02的文献,提取相关数据。应用Stata11．0,选用合适的模型计算合并OR及95％CI,并进行发表偏倚检验。结果：共纳入17篇文献,21项研究。其中关于GSTM1与儿童ALL的研究21项,包含病例组2365例,对照组3885例。关于GSTT1与儿童ALL的研究20项,其中病例组2263例,对照组3744例。GSTM1纯合缺失基因型及GSTT1纯合缺失基因型合并0R分别为1．13（95％CI：1．03～1．23）和1．07（95％CI：0．94～1．22）。亚组分析发现,在亚洲人群及黑种人中GSTM1纯合缺失基因型增加儿童ALL的发病风险,OR分别为1．25（95％CI：1．07～1．45）和1．43（95％CI：1．03～1．23）;在白种人中GsTMl纯合缺失与儿童ALL．无明显相关性（OR=1．05;95％CI：0．94～1．18）;在亚洲人群中GSTTl纯合缺失增加儿童ALL的发病风险（OR=1．32;95％CI：1．08～1．60）;在白种人及黑种人中GSTTl纯合缺失与儿童ALL无明显相关（OR=0．92,95％CI：0．77～1．10;OR=0．95,95％CI：0．55～1．63）。结论：GSTM1纯合缺失基因型增加儿童ALL的发病风险,GSTT1纯合缺失基因型可增加亚洲儿童ALL的发病风险。GSTM1与GSTT1基因多态性与儿童ALL的易感性关联受人种影响。     

GSTP1基因多态性与新疆维、汉肺癌易感性的关系

目的探讨谷胱甘肽S转移酶P1基因（glutathione S-transferase P1,GSTP1）rs1695位点多态性与新疆地区维吾尔族（维族）和汉族肺癌患者的相关性。方法采用病例—对照研究方法,选取维族、汉族肺癌患者各80例作为病例组,另以维族、汉族健康人群各80例为对照组,运用限制性片段长度多态性聚合酶链反应（PCRrestriction fragment length polymorphism,PCR-RFLP）技术检测GSTP1基因Ile105Val多态性,分析其基因型频率在2个民族间分布的差异。结果 （1）GSTP1基因rs1695位点多态性在对照组与病例组中的分布均符合HardyWeinberg平衡;（2）在维族人群中,GSTP1基因rs1695位点基因型在病例组与对照组中的分布频率差异无统计学意义（P〉0.05）。在汉族人群中,携带G等位基因者发生肺癌的风险增加（OR=2.170,95%CI：1.146~4.107,P〈0.05）;（3）维族人群突变型杂合子AG和纯合子GG基因型频率均高于汉族,其中在对照组中维族GSTP1（GG）基因型频率较汉族高1.3倍（8.8%vs 3.8%）,但差异均无统计学意义（均P〉0.05）。结论 GSTP1基因rs1695多态性与汉族人群肺癌发病风险相关,与维吾尔族人群无关,其相关性具有民族差异。     

ＧＳＴＭ１基因多态性与川北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）基因多态性与川北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）技术检测川北地区１２５例肺癌患者（肺癌组）和１２５例非肿瘤患者（对照组）ＧＳＴＭ１基因缺失型的频率,评价其与肺癌易感性的关系。结果　ＧＳＴＭ１缺失基因型［ＧＳＴＭ１（－）］频率在肺癌组和对照组分别为５８.４％和５６.８％,差异无统计学意义（Ｐ＝０.８２２）;ＧＳＴＭ１（－）基因型与肺鳞癌（ＯＲ＝０.９７,９５％ＣＩ：０.５２～１.８３,Ｐ＝０.９３４）和腺癌（ＯＲ＝０.９４,９５％ＣＩ：０.４２～２.０４,Ｐ＝０.８４４）风险亦无明确关系。结论　ＧＳＴＭ１各基因型与肺癌风险无明确关系。     

原发性肺癌GSTM1基因多态性与化疗效果关系的研究靠

背景与目的GSTM1参与环境污染物如苯丙芘和其它多环芳烃及抗癌药等的代谢,其多态性是否会影响肺癌患者的化疗效果及预后,国内相关研究比较少,本研究旨在揭示GSTM1多态性是否与化学药物治疗的敏感性有关以及对患者预后的影响。方法采用聚合酶链反应技术,检测接受化学药物治疗的137例原发性肺癌患者GSTM1基因型频率分布情况。结果137例肺癌患者GSTM1缺陷型频率为58.4%(80/ 137),功能型频率为41.6%(57/137);化疗有效组GSTM1缺陷型频率为69.05%(58/84),化疗无效组GSTM1缺陷型频率为41.51%(22/53),二者有统计学差异(P=0.001)。采用铂类化疗方案的患者,化疗有效组GSTM1缺陷型频率为65.43%(53/81),化疗无效组GSTM1缺陷型频率为42%(21/50),二者有统计学差异(P= 0.0025)。对于进展期患者化疗有效组GSTM1缺陷型频率为70.13%(54/77),化疗无效组GSTM1缺陷型频率为41.51%(22/53),二者有统计学差异(P=0.001)。当化疗有效时携带GSTM1功能型的鳞癌、小细胞癌患者生存时间(中位生存期分别为42个月和14个月)比携带GSTM1缺陷型的鳞癌、小细胞癌患者长(中位生存期分别为6个月和7个月)(P<0.05);而腺癌患者,携带GSTM1功能型和缺陷型的生存时间(中位生存期分别为13个月和11个月)差异无统计学意义(P>0.05)。对于化疗无效的患者,不论GSTM1为何种基因型、病理分型如何,患者中位生存期均比较接近,生存时间没有统计学差异(P>0.05)。结论GSTM1缺陷型的患者接受化学药物治疗的效果比GSTM1功能型的患者好;采用铂类化疗方案时GSTM1缺陷型的患者化疗效果比GSTM1功能型的患者好。当化疗有效时,患者生存时间与病理分型、GSTM1基因型相关。     

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.     

Genotypes of glutathione transferase M1 and P1 and their significance for lung DNA adduct levels and cancer risk

The A-G polymorphism at codon 104 in the glutathione S-transferase P1 (GSTP1) gene was examined in 138 male lung cancer patients and 297 healthy controls. The patients had significantly higher frequency of the GG genotype (15.9%) and a lower frequency of AA (38.4%) than the controls (9.1% and 51.5%, respectively). The level of hydrophobic DNA- adducts were determined in lung tissue from 70 current smokers. Patients with the GG genotype had a significantly higher adduct level than patients with AA (15.5 +/- 10.2 vs 7.9 +/- 5.1 per 10(8) nucleotides, P = 0.006). We also analyzed the deletion polymorphism in the GSTM1 gene in 135 male patients and 342 controls. The patients were stratified according to histology, smoking dose, age, adduct level and mutational types found in the tumors (Ki-ras and p53 genes). The results consistently indicated that the GSTM1 null genotype was associated with a slightly increased lung cancer risk. When the combined GST M1 and P1 genotypes were examined, patients with the combination null and AG or GG had significantly higher adduct levels than all other genotype combinations (P = 0.011). The distribution of combined genotypes was also significantly different in cases and controls, mainly due to increased frequency of the combination GSTM1 null and GSTP1 AG or GG among patients.      

GSTM1 null polymorphism and susceptibility to endometriosis and ovarian cancer

It is likely that heritable genetic factors contribute to the development of endometriosis, which is a putative precursor of the endometrioid and clear cell histological subtypes of ovarian cancer. The phase II glutathione S-transferases (GSTs) are a family of enzymes responsible for metabolism of a broad range of xenobiotics and carcinogens. Allelic variants of GSTs that have impaired detoxification function may increase the rate of genetic damage and thereby increase the susceptibility to cancer. The null genetic polymorphism in the gene encoding the GST class mu (GSTM1) enzyme has been reported to be significantly elevated in endometriosis patients and may represent an endometriosis susceptibility allele. In this study the frequency of the GSTM1 null genotype was investigated in 84 cases of endometriosis, 293 cases of ovarian cancer and 219 controls. All cases and controls were derived from women resident in the south east of England. The frequency of the GSTM1 null allele was not over-represented in the endometriosis patients (47.6%) compared with the controls (48.9%) (P = 0.898). In the ovarian cancer group the GSTM1 null genotype was significantly elevated compared with controls (59.0 versus 48.9%, P = 0.025). When stratified according to histological subtype a significantly increased GSTM1 null genotype was only observed for the endometrioid (65.4%, P = 0.013) and the combined endometrioid/clear cell ovarian cancers (67.0%, P = 0.004). We conclude that the GSTM1 null allele is not an endometriosis susceptibility allele, however, it may predispose endometriotic lesions to malignant transformation to endometrioid and clear cell ovarian cancer.     

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.     

CYP1A1 and GSTM1 genetic polymorphisms and lung cancer risk in Caucasian non-smokers: a pooled analysis

Polymorphisms for genes encoding the metabolic enzymes cytochrome P450 1A1 (CYP1A1) and glutathione S-transferase M1 (GSTM1) might contribute to the variability in individual susceptibility to lung cancer. The role of CYP1A1 and GSTM1 in lung carcinogenesis might be more important at low levels of exposure to carcinogens. Non-smokers represent a population at low exposure, however, they are often overlooked because of the small number of cases. We therefore conducted a pooled analysis of 14 case-control studies on lung cancer in Caucasian non-smokers with comparable information on genetic polymorphisms included in the International Collaborative Study on Genetic Susceptibility to Environmental Carcinogens. We pooled the raw data from a total of 302 cases and 1631 controls with random effects models. We also evaluated the possibility of inclusion bias and conducted influence analyses. The odds ratio (OR) of lung cancer for the variant CYP1A1 Ile(462)Val polymorphism (Ile/Val, Val/Val) was 2.99 [95% confidence interval (95%CI) 1.51-5.91]; this effect was stronger on lung adenocarcinoma (OR 4.85, 95%CI 2.03-11.6). After excluding outlying or imprecise studies, we did not observe a significant effect of the CYP1A1 MspI (T(3801)C) polymorphism or GSTM1 null genotype (OR 1.20, 95%CI 0.89-1.63). Furthermore, our analyses suggested a combined effect of the CYP1A1 Ile(462)Val polymorphism and GSTM1 null genotype. The OR for the combination of the CYP1A1 Ile(462)Val variant and GSTM1 null genotype was 4.67 (95%CI 2.00-10.9) compared with the concurrent presence of the CYP1A1 wild-type and GSTM1 non-null genotype. We did not observe a modification of the effect of the GSTM1 null genotype according to exposure to environmental tobacco smoke and urban/rural residence. Our study therefore suggests that the CYP1A1 Ile(462)Val variant allele might play a role in lung carcinogenesis among non-smokers, possibly in combination with the GSTM1 null genotype.     

CYP2D6、GSTM1遗传多态性与肺癌易感性关系

目的探讨中国汉族广东籍人群中ＣＹＰ２Ｄ６、ＧＳＴＭ１的遗传多态性与肺癌易感性关系。方法采用病例—对照研究方法,用ＰＣＲ检测ＣＹＰ２Ｄ６、ＧＳＴＭ１的基因型,限制性酶切电泳鉴定ＣＹＰ２Ｄ６点突变。结果病例组与对照组间未发现ＣＹＰ２Ｄ６多态性分布差异,而ＧＳＴＭ１多态性存在分布差异,病例组为５８．７％,对照组为３５．７％（Ｐ＜０．０５）,ＯＲ值为２．５６（１．１１－２．４４）。结论ＣＹＰ２Ｄ６Ｇ－Ａ突变与肺癌易感性未见有联系,ＧＳＴＭ１－／－型个体患肺癌易感性增高     

CYP1A1 GSTM1基因多态性和吸烟与肺癌易感性关系的病例对照研究

目的:探讨天津市居民致癌物代谢酶CYP1A1和GSTM1基因多态性对肺癌易感性的影响。方法:利用限制性片断长度多态性-聚合酶链反应(RFLP-PCR)方法检测原发性肺癌患者和健康对照者细胞色素P450酶基因CYP1A1Msp位点和谷胱甘肽硫转移酶基因GSTM1的多态性情况。结果:肺癌组与对照组之间CYP1A1和GSTM1基因型分布差异均存在统计学显著意义(P<0.05)。携带CYP1A1变异基因型或GSTM1阴性基因型的个体患肺癌的危险性增高,比值比(OR)分别达到2.44(1.04～5.81)和1.84(1.03～3.29)。多因素分析结果显示具有CYP1A1变异基因型、GSTM1阴性基因型的吸烟个体患肺癌的风险较大。结论:CYP1A1Msp位点变异基因型和GSTM1阴性基因型可能是肺癌的易感因素,吸烟与肺癌易感基因之间具有协同作用。