血管紧张素转换酶基因I/D多态性及醛固酮合成酶基因T-344C多态性与蒙古族人群原发性高血压的相关性研究

目的研究血管紧张素转换酶（ACE）基因及醛固酮合成酶（CYP11B2）基因多态性与蒙古族原发性高血压（EH）的关系。方法应用PCR-RFLP技术检测98例EH患者与正常对照组108名健康受试者ACE基因第16内含子I/D多态性及CYP11B2基因T-344C多态性。结果①蒙古族人ACE基因I/D位点II、ID、DD基因型频率在EH组和正常对照组分别为0.44、0.38、0.18和0.42、0.32、0.26，差异无显著性（χ^2=1.693，P=0.192）；②I、D等位基因的频率分别为0.63、0.37和0.58、0.42，差异无显著性（χ^2=0.808，P=0.363）；③CYP11B2T-344C位点TT、TC、CC基因型的频率在EH组和正常对照组分别为0.46、0.44、0.09和0.37、0.54、0.09，两组之间差异无显著性（χ^2=0.005，P=0.945）。④T、C等位基因频率分别为0.69、0.31和0.64、0.36，差异无显著性（χ^2=0.928，P=0.335）；⑤同时分析CYP11B2基因T-344C基因型与ACE基因I/D基因型在蒙古族人群患EH方面无协同作用。结论ACE基因I/D位点及CYP11B2基因T-344C位点与蒙古族人群患EH无相关性。     

糖尿病视网膜病变与血管紧张素转换酶基因缺失多态性的系统评价

采用meta分析系统评价中国汉族人血管紧张素转换酶(ACE)基因缺失(DD)多态性与2型糖尿病视网膜病变的关系.共纳入16篇符合条件的文献,共计2型糖尿病视网膜病变组1 014例,对照组1 135例.结果 显示OR为1.69(95%CI1.19～2.40),合并统计值Z=2.91(P=0.004).汉族人群ACE基因该多态性与糖尿病视网膜病变有关联,糖尿病视网膜病变组DD基因型增多.     

血管紧张素转化酶基因多态性与银屑病易感性的Meta分析

目的系统评价血管紧张素转换酶(ACE)基因多态性与银屑病发病风险的相关性。方法利用计算机全面检索Web of Science、Pubmed、EMBase、中国知网、中国生物医学文献数据库和维普7大数据库,并搜集有关ACE基因多态性与银屑病发病风险相关性的病例-对照研究,检索时限均从建库至2019年1月。由2名研究者独立筛选文献、提取资料并评价纳入研究的偏倚风险,采用Stata12.0软件进行Meta分析。结果共纳入12个病例-对照研究,包括病例组2 530例、对照组3 080例。最终Meta分析结果显示,ACE基因(D/I)多态性与银屑病发病风险的相关性无统计学意义(P>0.05),包括等位基因模型[I vs D:OR=1.001,95%CI(0.831～1.206),P=0.989];显性遗传模型[II+ID vs DD:OR=1.001,95%CI(0.831～1.206),P=0.989];隐性遗传模型[II vs ID+DD:OR=1.124,95%CI(0.846～1.462),P=0.384;ID vs DD:OR=0.905,95%CI(0.792～1.033),P=0.139;II vs DD:OR=1.061,95%CI(0.737～1.527),P=0.750]。基于人种的亚组分析显示,亚洲人群与欧洲人群关于ACE基因(D/I)多态性与银屑病发病风险均无明显相关性。结论基于目前的相关研究结果,认为ACE基因(D/I)多态性与银屑病易感性无明显相关性。     

血管紧张素转换酶基因多态性与扩张型心肌病关系的meta分析

目的:探索血管紧张素转换酶基因多态性与扩张型心肌病的关系。方法:检索PubMed、Web of Sci、EMBASE、CNKI与万方数据库,查找建库至2019-01-01发表的有关血管紧张素转换酶基因多态性与扩张型心肌病的关系的文献。应用STATA 15.1进行meta分析。结果:共纳入18篇文献,共包括1 815例扩张型心肌病患者和2 893例正常对照。将东亚国家与非东亚国家进行亚组分析后发现,东亚国家研究之间异质性较小(P0.05,4个模型的I~2依次为47.6%、47.8%、25.9%、49.7%),且等位基因频率(D:I)(OR=1.47,95%CI:1.17～1.85)以及加性模型(DD:DI)(OR=1.91,95%CI:1.40～2.60)、显性模型(DD+DI:II)(OR=1.33,95%CI:1.00～1.78)与隐性模型(DD:DI+II)(OR=1.97,95%CI:1.48～2.64)均显示ACE基因多态性与DCM有关。非东亚国家的ACE基因多态性与DCM的关系均没有统计学差异。所有模型的漏斗图呈现对称性。Egger检验显示,所有模型均显示没有发表偏倚。结论:东亚国家人群血管紧张素转换酶基因多态性与扩张型心肌病有关,等位基因D频率高更有可能患有扩张型心肌病。     

肾素-血管紧张素系统基因多态性与原发性高血压左心室肥厚关系的探讨

目的　探讨肾素 血管紧张素系统 (RAS)基因多态性与原发性高血压左心室肥厚 (EH LVH)的相关性以及在EH LVH产生中的多基因协同作用。方法　对 10 9例原发性高血压病 (EH)患者 ,采用聚合酶链反应 (PCR)以及聚合酶链反应 限制性片段长度多态性方法检测血液白细胞染色体DNA中血管紧张素转换酶 [ACE(I D) ]、血管紧张素原 [AGT(M2 35T) ]和血管紧张素Ⅱ 1型受体 [AT1 R(A116 6C) ]基因多态性 ;利用超声心动图检测左心室质量 (LVM)并计算左心室质量指数 (LVMI)。结果　ACE(I D)基因多态性D等位基因频率在EH LVH组中明显增高 (χ2 =4 .6 9,P=0 .0 30 ) ,男性EH患者中 ,ACE(I D)基因型构成比与LVH有关联 (χ2 =9.5 5 ,P =0 .0 0 8)。协同存在AGT TT型时 ,ACE(I D)基因多态性与EH LVH有关 (χ2 =6 .2 2 ,P =0 .0 4 4 ) ,且D等位基因在EH LVH明显增高 (χ2 =6 .91,P =0 .0 0 9) ,该类EH患者发生LVH的相对危险度增高 (OR :2 .5 0 ,95 %CI:1.2 5～ 5 .0 0 )。结论　ACE(I D)基因多态性D等位基因可能是LVH的独立危险因子。ACE基因多态性与AGT基因多态性之间的协同效应表明 ,同时携带AGT TT型时 ,具有ACE(I D)基因多态性D等位基因的EH患者更易发生LVH。     

血管紧张素转换酶和醛固酮合成酶基因多态性与氢氯噻嗪降压疗效的关系

目的研究血管紧张素转换酶(ACE)基因I/D多态性和醛固酮合成酶(CYP11B2)基因-344T/C多态性与氢氯噻嗪降压疗效的关系。方法829例高血压病(EH)患者同时服用氢氯噻嗪12·5mg(1次/d),6周后资料完整的785例患者按不同ACE基因型和CYP11B2基因型分组,比较不同基因型和不同基因型组合间血压下降值有无差别。结果服用氢氯噻嗪6周后,ACE基因II、ID、DD型患者收缩压分别下降(5·1±14·8)mmHg(1mmHg=0·133kPa)、(4·8±16·3)mmHg和(9·4±15·7)mmHg,DD型患者下降值大于II、ID型患者,组间比较差异有统计学意义(P<0·00);CYP11B2基因TT、TC、CC型患者收缩压下降值分别为(5·8±16·2)mmHg、(5·5±14·9)mmHg和(7·6±16·1)mmHg,组间比较差异无统计学意义。DD+CC基因型患者收缩压下降值为(10·6±12·3)mmHg,高于其他基因型组合患者,但差异无统计学意义(P>0·05)。多因素分析结果表明DD基因型和治疗前醛固酮浓度是影响患者坐位收缩压下降的主要因素。结论ACE基因的DD型与氢氯噻嗪的降压疗效相关,CYP11B2基因CC型、DD+CC型患者对氢氯噻嗪的降压反应可能优于其他基因组合患者。     

血清肾素-血管紧张素醛固酮水平与代谢综合征的相关性

目的:研究血清肾素-血管紧张素醛固酮水平与代谢综合征(MS)及其组分的相关性。方法:198例体检者采空腹静脉血查血糖(FPG)、甘油三酯(TG)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)、总胆固醇(TC)及肾素、血管紧张素、醛固酮水平、行糖耐量(OGTT)检测,测血压、身高及体重,计算体重指数(BMI)及醛固酮肾素比值,相关回归分析血清RAAS水平与血脂、血压、血糖、BMI及MS的相关性。根据是否患有MS分为MS组及对照组,比较2组的肾素、血管紧张素、醛固酮水平及醛固酮肾素比值大小。结果:血管紧张素Ⅱ与血脂组分TC(r=0.329)、TG(r=0.936)及BMI(r=0.29)正相关,与HDL-C(r=-0.256)负相关,与LDL-C(r=0.116,P=0.111)无明显相关性,Logestic回归分析血管紧张素Ⅱ与高血压、高血糖、高血脂及代谢综合征均有明显相关性(P0.001),其中与MS回归系数最高(Exp(B)=1.082),MS组血清肾素、血管紧张素Ⅰ、血管紧张素Ⅱ、醛固酮水平均明显高于对照组(P=0.000),2组醛固酮肾素比值无差异。结论:RAAS水平与MS密切相关。     

血管紧张素原、血管紧张素转换酶和内皮型一氧化氮合酶基因多态性与脑梗死的相关性研究

目的探讨中国人群血管紧张素原(AGT)、血管紧张素转换酶(ACE)和内皮型一氧化氮合酶(eNOS)基因多态性与脑梗死的相关性。方法应用基因芯片技术联合检测114例脑梗死患者和76例正常对照者AGT基因M235T、ACE基因I/D和eNOS基因G894T多态性位点,分别对两组的基因型及等位基因频率进行统计学分析。结果①脑梗死组AGT基因TT型、ACE基因DD型、eNOS基因TT型频率均比对照组显著升高,结果分别为65.79%vs47.37%,P=0.012;25.44%vs13.16%,P=0.040;7.89%vs1.32%,P=0.047;②AGTT等位基因、ACED等位基因、eNOST等位基因频率也明显高于对照组,结果分别为82.02%vs71.71%,P=0.018;52.19%vs34.21%,P=0.001;18.86%vs9.21%,P=0.010。③AGT、ACE和eNOS基因多态性联合分析显示脑梗死组AGTTT ACEDD、AGTTT eNOSTT、ACEDD eNOSTT基因型频率与对照组无显著性差异,结果分别为11.40%vs5.26%,P=0.146;6.14%vs1.32%,P=0.105;1.75%vs1.36%,P=0.100。结论AGT、ACE和eNOS基因多态性可能是中国南方汉族人群脑梗死的遗传危险因素,但AGT、ACE和eNOS基因在脑梗死的发生中不具有交互作用,并不增加脑梗死发生的危险机率。     

肝星形细胞存在局部肾素-血管紧张素-醛固酮系统

目的 明确肝星形细胞和永生肝星形细胞株HSC-T6是否存在局部肾素-血管紧张素-醛固酮系统。方法 采用原位酶灌注法分离培养肝星形细胞。采用放射免疫法检测细胞中肾素活性，血管紧张素Ⅱ和醛固酮水平；采用紫外分光光度法测定血管紧张素转换酶活性，免疫组化法检测血管紧张素Ⅱ1型受体的表达；RT-PCR法检测肾素，血管紧张素原，血管紧张素转换酶，血管紧张素Ⅱ1型受体醛固酮合成关键酶CYPⅡB2mRNA的表达。结果 肝星形细胞和HSC-T6中可检测到肾素活性，血管紧张素转换酶活性，血管紧张素Ⅱ和醛固酮；免疫组化结果显示二者均表达血管紧张素Ⅱ的1型受体；两种细胞均可检测到上述除血管紧张素原以外的4种基因mRNA表达。结论 肝星形细胞和HSC-T6存在局部肾素-血管紧张素-醛固酮系统。     

血管紧张素转换酶基因插入缺失多态性与原发性高血压患者合并心房颤动的相关性研究

目的探讨中国河南豫北地区汉族原发性高血压人群血管紧张素转换酶(ACE)基因插入(I)/缺失(D)多态性与心房颤动(房颤)的关系。方法采用病例对照法,选择原发性高血压患者803例,分为房颤组405例和窦性心律组398例,采用PCR-RFLP方法进行ACE基因I/D多态性分析。结果房颤组DD基因型频率明显高于窦性心律组(25.9%vs 13.1%),ID基因型频率明显低于窦性心律组(38.8%vs 50.3%,P<0.05)。与携带II+ID基因型者比较,携带DD基因型高血压患者房颤的风险增加(OR=2.13,95%CI:1.60³.29,P<0.05),携带DD基因型的高血压合并房颤患者左心房内径明显扩大,LVEF明显降低(P<0.05)。结论 ACE基因I/D多态性与原发性高血压患者房颤的发生存在相关性,DD基因型可能使高血压患者发生房颤的危险增加。     

Multiple Polymorphisms in the renin- angiotensin-aldosterone system (ACE, CYP11B2, AGTR1) and their contribution to hypertension in African Americans and Latinos in the multiethnic cohort

OBJECTIVE: When compared with other U.S. populations, African Americans have excess hypertension. Genetic variants in elements of the renin-angiotensin-aldosterone system (RAAS), namely the angiotensin-converting enzyme (ACE), aldosterone synthase (CYP11B2), and angiotensin II type 1 receptor (AGTR1) genes, have been associated with risk of hypertension in some populations. METHODS: We genotyped the D/I polymorphism in the ACE gene, the C(-344)T polymorphism in the CYP11B2 gene, and the C(-535)T polymorphism in the AGTR1 gene among African American and Latino members of the Multiethnic Cohort Study (MEC) to determine their association with hypertension. RESULTS: We observed no significant increase in the risk of hypertension for either African Americans or Latinos homozygous or heterozygous for the D allele of the ACE gene. Among African Americans we observed carriers of the (-344)T allele of CYP11B2 to be at increased risk of hypertension (versus CC genotype: TC genotype, OR = 1.66 [95% CI: 1.01-2.72]; TT genotype, OR = 1.74 [95% CI: 1.07-2.82]). There was also an increase in risk of hypertension associated with the AGTR1 T allele for African Americans (versus CC genotype: TC genotype, OR = 2.62 [95% CI: 1.46-4.72]; TT genotype, OR = 2.67 [95% CI: 1.51-4.74]). The associations observed with CYP11B2 and AGTR1 genotypes were not observed among Latinos. CONCLUSION: These data suggest that the (-535)T allele of AGTR1 and (-344)T allele of CYP11B2 may increase hypertension risk among African Americans but not among Latinos. Characterization of the linkage disequilibrium and haplotype patterns in the RAAS pathway genes will be crucial to understanding differences in hypertension susceptibility in these ethnic populations.     

CYP11B2 -344T/C gene polymorphism and blood pressure in patients with acromegaly

CONTEXT: The pathogenesis of increased blood pressure (BP) in acromegaly is unclear, and the role of IGF-I levels and the renin-angiotensin-aldosterone system (RAAS) in this disease remains controversial. OBJECTIVE AND DESIGN: The aim of this study was to investigate the role of gene polymorphisms of the RAAS and involved in sodium handling on BP in acromegaly. SETTING AND PATIENTS: We conducted a multicentric retrospective study that included 100 consecutive patients with acromegaly referred during the period 2000-2003. INTERVENTION: All patients were genotyped for ACE I/D, AGT M235T, CYP11B2 -344T/C, B2R -58T/C, and alpha-adducin G460W polymorphisms. MAIN OUTCOME MEASURE: We assessed the prevalence of hypertension and BP according to the genotype. RESULTS: Patients with the CYP11B2 -344CC genotype displayed a significant increase in the risk of hypertension compared with patients with CT/TT genotypes (odds ratio = 4.0; 95% confidence interval = 1.4-11.6; P = 0.01). Consistently, a significant proportion of patients with the CYP11B2 -344CC genotypes were under antihypertensive treatment (73.1%) compared with patients with the TT/TC genotypes (38.2%; P = 0.003). Patients with the -344CC genotype displayed a significant increase in systolic BP (10.2 +/- 4.3 mm Hg; P = 0.02) but not a significant increase in diastolic BP (2.6 +/- 2.6 mm Hg; P = 0.32) compared with patients with the CT/TT genotype. CONCLUSIONS: We have shown an association of the -344T/C CYP11B2 gene polymorphism with BP in patients affected by acromegaly. These findings suggest that the RAAS is implicated in the pathogenesis of hypertension in acromegaly.     

血管紧张素转化酶基因多态性对血清血管紧张素转化酶水平及血脂的影响

为探讨血管紧张素转化酶基因多态性对本地人群高血压患者和正常人血清血管紧张素转化酶及血脂水平的影响,采用聚合酶链反应技术,对118例高血压患者和98例正常人的血管紧张素转化酶基因插入/缺失多态性进行分型,并检测血清血管祭张素转化酶活性及血脂含量。结果发现,高血压组血管紧张素转化酶三种基因型(缺失纯合子型、插入纯合子型和杂合子型)及插入/缺失等位基因的频率与正常对照组比较差异无统计学意义(X2=0.468,P=0.791;X2=0.379,P=0.538)。血清血管紧张素转化酶活性在三种基因型之间差异有显著性意义(F=17.107,P=0.000)。高血压组总胆固醇、低密度脂蛋白胆固醇、脂蛋白(a)高于正常对照组(P<0.05);高血压组三种基因型之间血脂各指标含量及正常对照组三种基因型之间总胆固醇、低密度脂蛋白胆固醇、高密度脂蛋白胆固醇和载脂蛋白B含量差异有显著性意义(P<0.05)。此结果提示,血管紧张素转化酶基因多态性与血清血管肾张素转化酶活性及血脂含量有关,缺失纯合子型高血压患者血清血管紧张素转化酶活性最高且易患高脂血症。     

干扰素诱导抗病毒蛋白基因多态性与慢性丙型肝炎疗效相关性研究

目的探讨α-干扰素（IFN-α）诱导的黏病毒抵抗蛋白（MxA）和真核细胞起始因子调节区2（eIF-20α-reg2）基因的单核苷酸多态性（SNP）与慢性丙型肝炎（CHC）患者对IFN-α治疗应答的关系。方法前瞻性研究216例CHC患者，在接受IFN-α联合利巴韦林治疗48周，随访至停药后24周时，评价疗效[分为持续性应答（SVR）和非持续性应答（NSVR）]。应用多聚酶链反应（PCR）及限制性片段长度多态性（RFLP）法检测患者MxA启动子-88（G／T）、-123（C／A）及eIF-20α-reg2（MG）位点的SNP，并比较SNP与IFN疗效的关系。结果MxA 88位点：GT与GG型患者SVR（57．43％对34．21％）比较，差异有统计学意义（χ^2=9．37，P〈0．01）；TT与GG型患者SVR（66．67％对34．21％）比较，差异有统计学意义（χ^2=9．37，P〈0．01）。而GT与TT型患者SVR比较（57．43％对66．67％），差异无统计学意义（χ^2=1．00，P〉0．05）；MxA-123位点、eIF-20α-reg2位点基因型与IFN疗效比较：差异均无统计学意义（χ^2=4．87，P〉0．05；χ^2=1．66，P〉0．05）。多因素Logist回归分析结果显示：病毒载量（OR=3．178，95％CI：1．463～6．904，P=0．003）、干扰素种类（OR=3．117，95％CI：1．484～6．544，P=0．003）对SVR的独立影响具有统计学意义。MxA-88基因型（OR=1．470，95％CI：0．646～3．345，P=0．358）对SVR的独立影响无统计学意义。结论CHC患者MxA-88为TT或GT型者比GG型者对IFN-α应答好，但不是影响SVR的独立因素。     

rs3804100、rs3804099及rs2295080基因多态性与黑龙江省2型糖尿病患者并发肺结核关系的研究

目的探究Toll样受体2(Toll-like receptor 2,TLR2)rs3804100、rs3804099位点和哺乳动物雷帕霉素靶蛋白(mammalian target of rapamycin,mTOR)rs2295080位点基因多态性与2型糖尿病并发肺结核的关系。方法选择2017年1-9月黑龙江省传染病防治院收治的300例2型糖尿病并发肺结核患者作为观察组,以及同时期在哈尔滨医科大学附属第四医院内分泌科就诊的300例2型糖尿病患者作为对照组。所有患者收集血液提取DNA,用PCR技术对TLR2的rs3804100、rs3804099位点及mTOR的rs2295080位点进行基因多态性检测,并对这3个基因位点多态性与2型糖尿病并发肺结核的关系进行单因素和logistic多因素分析。结果单因素分析结果显示,TLR2的rs3804100位点TT、TC、CC(T:胸腺嘧啶;C:胞嘧啶)基因型在观察组和对照组分布构成比分别为51.3%(154/300)、25.7%(77/300)、23.0%(69/300)和47.0%(141/300)、31.3%(94/300)、21.7%(65/300),差异无统计学意义(χ^2=2.382,P=0.304);TLR2的rs3804099位点TT、TC、CC基因型在观察组和对照组分布构成比分别为53.0%(159/300)、29.7%(89/300)、17.3%(52/300)和54.3%(163/300)、33.0%(99/300)、12.7%(38/300),差异无统计学意义(χ^2=2.759,P=0.252);mTOR的rs2295080位点TT、TG、GG(G:鸟嘌呤)基因型在观察组和对照组分布构成比分别为26.7%(80/300)、67.3%(202/300)、6.0%(18/300)和24.3%(73/300)、66.0%(198/300)、9.7%(29/300),差异无统计学意义(χ^2=2.935,P=0.231)。logistic多因素分析结果显示,TLR2的rs3804100位点TC、CC基因型的OR(95%CI)值分别为1.261(0.591~2.689)和1.284(0.542~3.042),P值分别为0.549和0.569;TLR2的rs3804099位点TC、CC基因型的OR(95%CI)值分别为0.752(0.461~1.227)和0.729(0.430~1.235),P值分别为0.254和0.240;mTOR的rs2295080位点TG、GG基因型的OR(95%CI)值分别为1.789(0.890~3.596)和1.603(0.839~3.063),P值分别为0.103和0.153。结论 TLR2基因rs3804100、rs3804099位点及mTOR的rs2295080位点多态性与黑龙江省2型糖尿病并发肺结核均无相关性。     

Genetic polymorphisms of the renin-angiotensin-aldosterone system and renal insufficiency in essential hypertension

OBJECTIVE: The renin-angiotensin-aldosterone system (RAAS) plays an important role in the control of renal function both in physiological and pathological conditions. The aim of the present study was to evaluate the relation between four genetic polymorphisms of the RAAS and renal insufficiency in a population of patients with essential hypertension living in north-east Italy. DESIGN AND METHODS: Eighty-six hypertensive patients with renal insufficiency and 172 hypertensive patients without renal damage matched for age and hypertension duration to within 2 years were evaluated. Genotyping for insertion/deletion of angiotensin-converting enzyme (ACE I/D), angiotensinogen (AGT) M235T, angiotensin II type 1 receptor (AT1R) A1166C and aldosterone synthase (CYP11B2) -344C/T polymorphisms were performed using polymerase chain reaction, with further restriction analysis when required. RESULTS: Each of the genetic polymorphisms of the RAAS genes was associated with renal failure; the adjusted odds ratios were 1.47 and 1.89 for ACE D allele, assuming a co dominant and a recessive mode of inheritance, respectively; 1.51 for AGT T235 allele assuming a co dominant, and 1.98 assuming a recessive, pattern of inheritance; 1.79 for AT1R C1166 allele considering a dominant pattern; and 3.89 for CYP11B2 -344C allele as a recessive effect. However, CYP11B2 genotypes were not in Hardy-Weinberg equilibrium among controls. The associations AGT TT-AT1R AC and CYP11B2 CC-ACE DD showed a possible positive interaction in the development of renal insufficiency among hypertensive subjects. The association AGT MM-AT1R AA and AGT MM-AT1R AA-CYP11B2 TT or TC combinations were associated with a reduced risk for renal failure. CONCLUSIONS: Our findings suggest that in patients with essential hypertension an unfavorable genetic pattern of RAAS may contribute to the increased risk for the development of renal failure.     

Searching for a better assessment of the individual coronary risk profile. The role of angiotensin-converting enzyme, angiotensin II type 1 receptor and angiotensinogen gene polymorphisms.

BACKGROUND: Polymorphisms within renin angiotensin system genes have been investigated as risk factors for coronary artery disease in different populations with contradicting results. The aim of this study was to investigate the genotype distribution and the allele frequencies of ACE, AT1R and AGT gene polymorphisms as coronary artery disease factors and their synergistic effects on coronary risk in an Italian population. METHODS AND RESULTDS: In this study ACE, AT1R and AGT gene polymorphisms were investigated in 205 consecutive coronary artery disease patients and in 209 controls. These polymorphisms were analysed by polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP). The ACE D and AGT 235T allele, but not AT1R C allele, frequency was statistically significant in patients. An association between coronary artery disease and ACE DD, AT1R CC and AGT TT genotype, was found by univariate analysis (OR 2.06 P=0.0007, OR 2.49 P=0.009, OR 1.87 P=0. 019, respectively). At multivariate analysis ACE DD and AT1R CC genotype (OR 1.81 P=0.011, OR 2.61 P=0.011, respectively) remained associated with coronary heart disease. Subjects carrying the ACE DD genotype and AT1R C allele showed a stronger association with myocardial infarction (OR=4.02, P<0.0001). CONCLUSION: Our report indicates the increased risk of coronary artery disease in the presence of ACE DD and AT1R CC genotypes independent of other risk factors, in Italian patients. The present study stresses the relevance of screening for genetic risk factors.     

Combination of renin-angiotensin system polymorphisms is associated with altered renal sodium handling and hypertension

Genes of the renin-angiotensin-aldosterone system (RAAS) are natural candidates for sodium homeostasis and blood pressure regulation. To investigate the effect of a combination of polymorphisms of RAAS genes on renal sodium handling and blood pressure, 918 participants to the Olivetti Heart Study were genotyped for the following polymorphisms: I/D of angiotensin converting enzyme (ACE), M235T of angiotensinogen (AGT), A1166C of angiotensin II type-1 receptor (AT1R), and C-344T of aldosterone synthase (CYP11B2). The segmental renal sodium handling was evaluated by the fractional excretions of exogenous lithium (FE-Li), uric acid (FE-UA), and sodium (FE-Na). Twenty-eight carriers of triple homozygosity for M (AGT), A (AT1R), and C (CYP11B2) in the presence of the D allele of ACE (DD/ID) showed lower FE-Li (20.0%+/-5.9% versus 25.0%+/-7.5%; P=0.004; mean+/-sD), FE-UA (6.3%+/-2.0% versus 8.2%+/-2.7%; P=0.001), and FE-Na (0.96%+/-0.41% versus 1.22%+/-0.61%; P=0.004) as compared with all other allelic combinations (n=890), independently from age and body mass, suggesting an enhanced rate of proximal tubular sodium reabsorption. The carriers of the MM, AA, CC, DD/ID combination showed a substantially higher probability of being hypertensive (OR: 3.4 [(99% CI: 1.1 to 10.1]), independently of age and body mass. This relatively rare combination of allelic variants of candidate genes of the RAAS is associated with a significant alteration in proximal renal sodium handling and with higher risk of hypertension, suggesting that a combination of polymorphic variants at different candidate loci may affect phenotypic expression even in the absence of detectable effects of each variant at any single locus.     

白细胞介素-8基因251 A/T位点的多态性与亚洲人群胃癌易感性的Meta分析

[目的]用Meta分析的方法评价IL-8基因251 A/T位点的多态性与亚洲人群胃癌易感性的关系。[方法]检索Web of science、PubMed、EMBASE、万方数据库、中国生物医学文献数据库、中文科技期刊数据库、中国期刊全文数据库,日期均从各数据库开始建库至2018年1月。全面检索IL-8基因251 A/T位点的多态性与胃癌易感性的病例对照研究文献,采用STATA统计软件进行Meta分析。[结果]最终纳入15篇病例对照研究进行Meta分析,共计3738例胃癌患者、4497例健康对照者。分析结果显示,IL-8基因251 A/T位点在等位基因模型(A vs T:OR=1.12;95%CI为1.04~1.21;P=0.002)、共显性模型(AA vs AT:OR=1.15;95%CI为1.00~1.32;P=0.050)、相加模型(AA vs TT:OR=1.36;95%CI为1.18~1.57;P=0.000)、相加模型(AT vs TT:OR=1.23;95%CI为1.11~1.36;P=0.000)、显性模型(AA vs AT+TT:OR=1.23;95%CI为1.08~1.40;P=0.002)、隐性模型(TT vs AA+AT:OR=1.26;95%CI为1.15~1.39)下均与亚洲人群胃癌易感性有关。[结论]IL-8基因251 A/T位点多态性与亚洲人群胃癌的易感性相关。     

热休克蛋白70-hom基因多态性与老年脑梗死易感性的研究

目的探讨热休克蛋白70(Hsp70)-hom基因多态性与老年脑梗死和高血压发生的关系。方法选择住院和门诊的老年患者220例,按诊断分为脑梗死组105例和高血压组115例,脑梗死组又分为单纯组38例和合并组67例,同期选取健康体检者100例为健康组。采用PCR-RFLP方法检测Hsp70-hom+2437位点基因多态性。结果与健康组比较,脑梗死组Hsp70 hom TT基因型及T等位基因明显升高,分别达到70.48%和82.38%(OR=3.311,95%CI:2.078～4.359,P=0.000;OR=2.121,95%CI:1.271～3.325,P=0.003)。与健康组比较,合并组、单纯组C与T等位基因频率有显著差异(OR=1.193,95%CI:1.128～3.246,P<0.05;OR=2.31 2,95%CI1.128～4.721,P<0.05)。结论 Hsp70 hom基因多态性与脑梗死易感性有关,Hsp70 hom+2437位点基因型的检测价值,值得进一步探讨。