怀化地区侗族高血压高发人群G蛋白β3亚单位基因825C/T多态性研究

目的探讨G蛋白β3亚单位(GNB3)基因825C/T多态性与怀化侗族高血压高发人群原发性高血压之间的关系.方法采用聚合酶链反应结合限制性内切酶片段长度多态分析方法(PCR-RFLP)检测96例怀化侗族高血压病人和89例健康人的GNB3 825C/T等位基因频率和基因型频率.结果高血压组GNB3 825C/T基因型频率(CC18.8%、CT59.4%、 TT21.8%)等位基因频率(C48.4%、T51.6%)与正常对照组基因型频率(CC24.7%、CT52.8%、 TT22.5%)等位基因频率(C51.1%、T48.9%)比较无显著差异;CC基因型患者与CT TT型基因型患者比较,收缩压和舒张压无显著性差异.结论 GNB3基因多态性与怀化侗族人群原发性高血压无关.     

牡丹江地区汉族及朝鲜族高血压人群中G蛋白β3亚单位825C/T的多态性

背景：G蛋白β3亚单位825C/T基因多态性与朝鲜族人群原发性高血压是否存在关系尚无报道。 目的：研究牡丹江地区朝鲜族、汉族高血压患者C825T基因的多态性。 方法：纳入2008-09/2010-08在牡丹江市朝鲜民族医院内科就诊的原发性高血压患者224例作为病例组,同时选取同时期的门诊体检的健康者196例作为对照。用PCR-RFLP检测G蛋白β3亚单位基因C825T多态性,观察TT,CT,CC基因型频率及等位基因频率。 结果与结论：PCR-RFLP检测结果显示牡丹江地区朝鲜族高血压患者与朝鲜族健康人TT,CT,CC基因型频率差异无显著性意义(P > 0.05);T,C等位基因频率差异有显著性意义(P < 0.05)。而牡丹江地区汉族人群中TT,CT,CC基因型分布在高血压人群和正常人群差异有显著性意义(P < 0.05),而T,C等位基因频率差异无显著性意义(P > 0.05)。朝鲜族高血压组等位基因C的比例较高,而汉族高血压组等位基因T的比例较高,存在民族异质性。提示G蛋白β3亚单位基因C825T多态性与牡丹江地区朝鲜族高血压无关联,但其是牡丹江地区汉族高血压的危险因素。     

G蛋白β3亚单位基因多态性与原发性高血压的相关性研究

目的探讨G蛋β3亚单位基因(GNB3)多态性与原性高血压的关系。方法高血压患者110例,健康对照者150例,采用聚合酶链反应(PCR)和限制性内切酶切割的方法分析GNB3多态性及分布,同时记录性别及血压。结果与健康组比较,EH组各基因型分布及等位基因频率无显著性差异,CC与T等位基因比较P=0.051;EH组中TT基因型患者收缩压水平显著高于CC/CT型(P=0.003)。结论G蛋白β3亚单位基因(GNB3)多态性参与高血压的发生,发展过程,且与收缩压密切相关。     

G蛋白β3亚单位基因C825T多态性与蒙古族原发性高血压的相关性研究

目的探讨G蛋白β3亚单位基因C825T多态性与蒙古族人群原发性高血压患者之间的关系。方法采用Sequenom系统检测分析方法检测124例健康人和143例高血压患者的G蛋白β3亚单位基因C825T多态性。结果（1）蒙古族人群GNB3基因C825T位点CC、CT、TT基因型频率在高血压组和正常血压组分别为0．48、0．41、0．11和0．43、0．47、0．10，差异无显著性（χ^2=0．162，P=0．688；OR：1．176，95％CI 0．533～2．592）；C、T等位基因频率在高血压组和对照组分别为0．69、0．31和0．67、0．33差异无显著性（χ^2=0．094，P=0．759；OR：0．945，95％CI0．657—1．358）。（2）蒙古族人群GNB3基因C825T位点CC、CT、TT基因型频率在单纯收缩压增高组和正常血压组分别为0．57、0．35、0．08和0，43、0．47、0．10．差异无显著性（χ^2=0．733．P=0．392；OR：1．957，95％CI0．623—6．143）；C、T等位基因频率在单纯高血压组和对照组分别为0．74、0．26和0．67、0．33，差异无显著性（χ^2=2．133，P=0．144；OR：0．697，95％CI0．428—1．133）。结论G蛋白β3亚单位基因C825T位点与蒙古族人群原发性高血压的发生可能无关，不是蒙古族人群原发性高血压的遗传标志．     

成都地区肥胖患者GNB3基因825C/T多态性研究

目的 研究G蛋白β3亚单位(G-protein β3 subunit,GNB3)基因825C/T多态性是否与中国人肥胖有关联,为探讨肥胖的分子遗传基础提供依据.方法 应用聚合酶链反应-限制性片段长度多态性分析法,对成都地区270名非肥胖者及129例肥胖患者GNB3基因825C/T多态性位点进行分析,采用酶法和单向免疫扩散法对血脂和载脂蛋白水平进行测定.结果 GNB3基因825C/T位点C、T等位基因的频率在肥胖组为0.531、0.469,在非肥胖组为0.528、0.472,两绀间等传基因的频率差异无统计学意义(P＞0.05).中国人825C/T位点T等位基因频率(0.471,合并组)较德国白人的0.319显著增高(P＜0.01),而低于非洲黑人的0.788(P＜0.01),与日本人的0.487相近(P＞0.05).825C/T位点在非肥胖组TT基因型携带者血清甘油三酯水平高于CT基因型者(P＜0.05);在肥胖组CC基因型携带者血清高密度脂蛋白胆固醇水平较CT基因型者降低(P＜0.05).进一步按件别分层后,这种差异仪在相应各组的男性、女性亚组存在;此外,非肥胖男性TT型者、女性CC型者血清高密度脂蛋白胆固醇、载脂蛋白A Ⅰ水平分别低于和高于相应业组CT型者(P＜0.05),肥胖男性亚组TT型者血清载脂蛋白A Ⅰ水平高于CC型者(P＜0.05).结论 GNB3基因825C/T多态性与中国成都地区汉族人肥胖无关联,但与血清甘油三脂、高密度脂蛋白胆同醇和载脂蛋白A Ⅰ水平含量有关,且具有性别差异存在.     

5-羟色胺转运体、G蛋白β3亚单位基因多态性与抑郁症的相关性研究

目的:观察5-羟色胺转运体基因(5-HTTLPR)和G蛋白β3亚单位基因(GNβ3 C825T)多态性在中国抑郁症患者中的分布情况及特点,探讨抑郁症发生的遗传机制。方法:采用聚合酶链反应和限制性片段内切酶的方法检测了180例抑郁症患者(其中男性84例,女性96例)及156例健康人对照组的5-HTTLPR和GNβ3 C825T基因多态性。结果:5-HTTLPR和GNβ3 C825T基因多态性在两组人群中的分布差异均有显著性,抑郁症组的5-HTTLPR SS基因型及S等位基因频率和GNβ3 825TT基因型及T等位基因频率均高于对照组(P<0.05)。进一步联合基因型分析显示:同时具有5-HTTLPRS和GNβ3 825T等位基因者患抑郁症的相对危险度(OR=3.25,P=0.001)比单独具有5-HTTLPRS等位基因(OR=1.817,P=0.01)或GNβ3 825T等位基因者高(OR=2.214,P=0.001)。结论:5-HTTLPR和GNβ3 C825T基因可能均是抑郁症的易感基因,且显示这两个基因在抑郁症的发病中存在微效协同作用。     

妊娠期高血压疾病与转化生长因子TGFβ1-509C/T基因多态性关系的探讨

目的探讨妊娠期高血压疾病(以下简称妊高征)与转化生长因子TGFβ1-509C/T基因多态性的关系。方法运用多聚酶链反应技术检测32例妊高征患者,68例正常妊娠妇女转化生长因子TGFβ1-509C/T基因多态性。结果妊高征患者TGFβ1-509C/T基因CC、CT、TT基因型频率及C、T等位基因频率分别为6.25%、43.75%、50.00%,对照组CC、CT、TT基因型频率及C、T等位基因频率分别为14.71%、45.59%、39.7%,两组基因型及等位基因频率比较差异无统计学意义。结论从目前检测例数来讲,TGFβ1-509C/T基因多态性与妊娠高血压综合征的发病无关。     

间隙性连接蛋白37基因1019C/T多态性与经皮冠状动脉介入术后支架内再狭窄的相关性研究

目的 评估无锡地区人群间隙性连接蛋白37(Connexin 37,CX37)基因1019C/T多态性与经皮冠状动脉介入术(percutaneous coronary intervention,PCI)术后支架内再狭窄的相关性.方法 532例PCI术后在我院复查冠脉造影的冠心病患者,按造影结果分为支架内再狭窄组(67例)和无支架内再狭窄组(465例),501名健康人群作为正常对照组,均采用基因测序技术对CX37基因1019C/T多态性位点基因型进行检测,比较3组人群中基因型及等位基因分布差异.结果 (1)在冠心病组与正常对照组比较中,C等位基因及C等位基因携带者(CC+TC)基因型频率冠心病组明显高于正常对照组(C等位基因:57.05％ vs.41.32％,P＜0.01;C等位基因携带者:79.32％ vs.65.47％,P＜0.01)；与TT纯合子相比,(CC+TC)基因型冠心病患病风险显著增加(OR=2.03,95％ CI∶1.53～2.80).对性别进行亚组分析显示,无论男性还是女性人群中冠心病组C等位基因携带者频率均显著高于正常对照组(男性:79.63％ vs.72.45％,P=0.02;女性:78.00％ vs.51.50％,P＜0.01),C等位基因携带者冠心病患病风险明显高于TT型(男性:OR=1.48,95％CI:1.06～2.09;女性:OR=3.34,95％CI∶1.90～5.86).(2)与无支架内再狭窄组相比,支架内再狭窄组C等位基因频率及C等位基因携带者分布频率均显著升高(C等位基因频率:72.39％ vs.54.84％,P＜0.01；CC+TC型:89.55％ vs.77.85％,P=0.027).与TT纯合子相比,C等位基因携带者支架内再狭窄患病风险升高2.44倍(95％ CI∶1.08～5.50).性别亚组分析表明,男性人群中支架内再狭窄组C等位基因携带者频率高于无支架内再狭窄组(92.86％ vs.77.66％,P=0.008),C等位基因携带者发生支架内再狭窄的风险是TT型的3.74倍(95％ CI∶1.32～10.64),而在女性人群中两组间(CC+TC)基因型分布频率无统计学意义(P=0.655).结论 CX37 C等位基因不仅与冠心病的发生发展有关联,而且与男性PCI术后支架内再狭窄的发生发展相关.     

宁夏回、汉族群体TGF-β1第1外显子区基因多态性分析

目的 探讨转化生长因子β1(TGF-β1)基因第1外显子区SNP+ 869 (T/C)和SNP+ 915 (G/C)多态性在宁夏回族、汉族人群中的分布特征.方法 用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)技术对210例回族和308例汉族人群转化生长因子β1第1外显子区(+ 869位点、+915位点)两个多态性位点进行检测.结果 宁夏回族群体TGF-β1基因第1外显子区两个多态性位点各基因型频率及等位基因频率分别为:+869(TT:25.24％;CT:52.38％; CC:22.38％;T:51.43％;C:48.57％);+915(GG:98.10％; GC:1.90％; CC:0％;G:99.04％;C:0.96％);宁夏汉族群体TGF-β1基因第1外显子区两个多态性位点各基因型频率及等位基因频率分别为:+869(TT:30.52％;CT:48.05％;CC:21.43％;T:54.55％;C:45.45％);+915(GG:99.03％;GC:0.97％;CC:0％;G:99.51％;C:0.49％),两组间无差异.按性别分组,亦无差异.结论 TGF-β1基因第1外显子区+869、+915两个多态性位点在宁夏回、汉族人群及不同性别间无差异.     

原发性高血压患者α-ADDUCIN和GNB3联合分析

目的 观察齐齐哈尔地区原发性高血压（EH）病患者α-ADDUCIN G460W和GNB3 C825T多态性及其在原发性高血压发病中的相互作用。方法 EH患者331例，对照组293例。取外周血提取基因组DNA，用PCR-RLFP对α-ADDUCIN和GNB3进行基因分型。结果 (1)血压正常组和高血压组α-ADDUCIN G460W各种基因型分别为GG 0.177/0.160、GW 0.580/0.481、WW 0.242/0.359（P<0.01），W等位基因频率为0.532/0.600（P<0.05）；(2) 血压正常组和高血压组GNB3 C825T各种基因型分别为CC 0.177/0.353、CT 0.468/0.541、TT 0.355/0.106（P＜0.001），T等位基因频率为0.589/0.376（P＜0.001）；(3)高血压组WW+CC和WW+CT联合基因型频率显著高于血压正常组(P分别为＜0.001和＜0.01)，而高血压组GG+TT、GW+TT及WW+TT联合基因型频率显著低于血压正常组(P分别为＜0.01、＜0.001及＜0.001)。结论 α-ADDUCIN G460W和GNB3 C825T多态性与齐齐哈尔地区人群的高血压相关，且两基因还可能存在相互作用。     

The interleukin 1B-511 polymorphism is associated with the risk of developing restenosis after coronary stenting in Mexican patients

Inflammation is the primary response to vessel wall injury caused by stent placement in coronary arteries. Cytokines of the interleukin-1 family are central regulators in immunoinflammatory mechanisms. The objective of this study was to test for association between IL-1 family gene polymorphisms and risk for restenosis after coronary stent placement. The IL-1B-511, IL-1F10.3, RN.4T>C, RN.6/1C>T, RN.6/2C>G, and IL-1RN VNTR polymorphisms were analyzed by 5' exonuclease TaqMan genotyping assays and polymerase chain reaction in a group of 165 patients who underwent coronary artery stenting. Basal and procedure coronary angiography were analyzed in search of angiographic predictors of restenosis and follow-up angiography was analyzed in search of binary restenosis. Patients with IL-1B-511 TT genotype had a 1.89-fold increased risk of developing restenosis. The analysis considering the lesions treated demonstrated that the lesions of patients with IL-1B-511 TT genotype had a 3.44-fold increased risk of developing restenosis. When the analysis considered the type of stent, the risk of developing restenosis was increased in lesions of patients with TT genotype (odds ratio = 4.50) who underwent coronary bare-metal stent implantation. Multiple logistic analysis identified IL-1B-511 TT genotype as an independent predictor for restenosis. The results suggest that IL-1B-511 polymorphism could be involved in the risk of developing restenosis after coronary stent placement.     

G-protein beta3-subunit gene variant,blood pressure and erythrocyte sodium/lithium countertransport in essential hypertension

Recently, a C825T polymorphism in the gene coding for the beta3 subunit of G proteins (GNB3) has been described in cells from patients with essential hypertension and enhanced Na+/H+ exchange activity. This study aims to evaluate the association between the 825T allele and activity of erythrocyte sodium/lithium countertransport (Na+/Li+ CT) and other sodium transport systems in red blood cells from patients with essential hypertension. A group of 77 patients (36 male, 41 female; aged 51.7 +/- 1.1 years) was studied. The maximal rates (Vmax) of Na+/Li+ CT, Na+/K+/Cl- cotransport and Na+K+ ATPase were evaluated in erythrocytes from all the patients. They were genotyped for the C825T polymorphism by a polymerase chain reaction (PCR) method, followed by digestion with BseDI. Body mass index (BMI) was higher in CT+TT patients than in CC patients (28.9 +/- 0.5 vs. 27.0 +/- 0.7 kg/m2; P=0.023). Hypertensives with the T allele (CT+TT genotypes) showed significantly higher systolic blood pressure (BP) values (156.9 +/- 2.1 vs. 148.9 +/- 2.8 mmHg; P=0.024), whereas differences in diastolic BP did not reach statistical significance (96.4 +/- 1.0 vs. 94.0 +/- 1.1 mmHg; P=0.120). No differences in the Vmax of Na+/Li+ CT between the genotypes was seen (CC: 236 +/- 19 and CT+TT 277 +/- 23 mmol/L cells per h; P=0.221). Similarly, no differences were detected in the Vmax of erythrocyte Na+/K+/Cl- cotransport and Na+K+ ATPase among the genotypes. There was no appreciable association between the G-protein beta3-subunit C825T polymorphism and erythrocyte Na+/Li+ CT and other sodium transport systems in the hypertensive patient sample studied; however, those with the T allele were more obese and had more severe systolic hypertension.     

The C allele of the GNB3 C825T polymorphism of the G protein beta3-subunit is associated with an increased risk for the development of oncocytic thyroid tumours

Carriers of the C allele of the common C825T polymorphism in the GNB3 gene of the G protein have been associated with the development of follicular thyroid adenomas. Since the C allele of this polymorphism is related to a lower signalling capacity, it was speculated whether the C825T polymorphism may play a particular role in oncocytic thyroid tumours, which are recognized for their reduced ability to synthesize thyroid-specific proteins and hormones, although they possess an intact thyroid-stimulating hormone receptor-adenylyl cyclase system. Using pyrosequencing, both the genotype distribution and the allele frequency of the C825T polymorphism were investigated in a series of 104 patients with oncocytic thyroid tumours of follicular cell origin [58 adenomas, 41 follicular thyroid carcinomas (FTCs), and five papillary thyroid carcinomas (PTCs)]; the results were compared with those obtained from 321 age and gender-matched healthy blood donors and a series of 327 non-oncocytic thyroid tumours of follicular cell origin (119 adenomas, 80 FTCs, and 186 PTCs). Analysis of the genotype distribution (comparing oncocytic with non-oncocytic tumours of the present series) revealed a significantly increased odds ratio (OR) for CC versus TT (OR = 4.22; p = 0.011) and CC versus CT (OR = 1.62; p = 0.049) carriers to develop an oncocytic thyroid tumour; ORs to develop an oncocytic thyroid tumour were also increased comparing the genotype distribution between the group of oncocytic tumours and healthy controls for CC versus TT (OR = 3.73; p = 0.017) and CC versus all T carriers (OR = 1.56; p = 0.034). Oncocytic thyroid tumours as a group showed a statistically significant increase of the C-allele frequency when compared with all non-oncocytic tumours (p = 0.0039) as well as healthy blood donors (p = 0.017). The results strongly suggest that the C allele of the GNB3 C825T polymorphism of the G protein beta3-subunit is associated with an increased risk for the development of oncocytic thyroid tumours. This polymorphism may thus be considered a (co)factor favouring the development of oncocytic thyroid tumours, although the biological mechanism(s) underlying this association remain obscure.     

怀化地区侗族高血压高发人群醛固酮合成酶基因多态性(-344C/T)研究

目的探讨醛固酮合成酶(CYB11B2)基因多态性与怀化侗族高血压高发人群原发性高血压(EH)及血脂水平的关系.方法采用聚合酶链反应结合限制性内切酶片段长度多态分析方法(PCR-RFLP)检测89例怀化侗族高血压病人和85例正常人的CYB11B2-344C/T等位基因频率和基因型频率.结果高血压组CYB11B2-344C/T基因型频率(CC 10.1%、CT41.6%、TT 48.3%)和等位基因频率(C 30.9%、T 69.1%)与正常对照组基因型频率(CC 10.3%、CT 27.6%、TT 62.1%)和等位基因频率(C 24.1%、T 75.9%)比较无显著性差异.CC基因型患者与CT TT基因型患者比较,收缩压和舒张压无显著性差异.结论怀化侗族人群EH可能与CYB11B2基因多态性无关.     

The guanine nucleotide binding protein β polypeptide 3 gene C825T polymorphism is associated with elite endurance athletes

A functional C825T polymorphism in the human guanine nucleotide binding protein β polypeptide 3 ( GNB3 ) gene has been associated with enhanced G protein activation. Since reports regarding the interaction between physical activity and the GNB3 C825T polymorphism are limited and inconsistent, the aim of this study was to determine the frequency of C825T alleles among 155 elite Israeli athletes (endurance athletes and sprinters) and 234 healthy control subjects. Genotyping for GNB3 C825T was performed using polymerase chain reaction on DNA from leucocytes. Results showed that there was a significant difference in GNB3 C825T polymorphism genotype frequencies between endurance athletes and sprinters ( P = 0.045) as well as between endurance athletes and control subjects ( P = 0.046). We also observed a significantly higher proportion of the GNB3 TT genotype in the group of endurance athletes (19%) compared with the sprinters (5%, P = 0.014) and the control subjects (8.5%, P = 0.026). In the group of athletes, the odds ratio of GNB3 TT genotype being an endurance athlete was 4.49 (95% confidence interval 1.4–14.3) and of GNB3 CC genotype was 0.91 (95% confidence interval 0.47–1.77). These results were even more pronounced when we compared between the subgroups of 20 top-level endurance athletes and 24 top-level sprinters. We conclude that in Israeli athletes the GNB3 TT genotype is higher in elite endurance athletes than it is in sprinters, and within the endurance group it is higher in top-level athletes, suggesting a positive association between the TT genotype and the likelihood of being an elite endurance athlete.     

Role of G protein beta3 subunit C825T and HLA class II polymorphisms in the immune response after HBV vaccination

The G protein beta3 (GNB3) subunit and HLA are candidate genes predictive of immune response capacity. We therefore studied the influence of both gene systems on cellular and humoral immunity against hepatitis B virus (HBV) in 79 HBV booster-vaccinated healthy volunteers and an independent group of 77 probands after HBV basic immunization. Following booster vaccination, lymphocyte in vitro proliferation after stimulation with HBV surface antigen was 2.5-fold increased in GNB3 825T (TC + TT) vs CC allele carriers (P = 0.01) and was not influenced by HLA-DRB1 or DQB1 alleles. In addition, anti-HBs antibody titers in both groups were 2-fold increased in TC vs CC and decreased in TT vs CC allele carriers. However, antibody titers after HBV booster immunization were elevated in HLA-DQB1*0301 carriers (P corrected = 0.027). In summary, the GNB3 825T allele appears as a marker particularly predictive of cellular and HLA-DQB1*0301 of humoral immune responses following HBV vaccination.     

Association of the platelet glycoprotein Ia C807T/G873A gene polymorphism and thrombosis in Behçet patients

Thrombosis is a common complication of Beh?et disease and the pathogenic mechanism of thrombotic tendency in Beh?et disease is not well known. Several platelet membrane glycoprotein gene polymorphisms have been identified as risk factors for thrombosis. This study aimed to evaluate the possible role of the GP Ia C807T/G873A polymorphism as a risk factor for thrombosis in Beh?et disease. We determined the prevalence of platelet glycoprotein Ia C807T/G873A gene polymorphism in Beh?et patients. Genomic DNA was obtained from 20 patients with Beh?et disease and 61 controls. All individuals were of Turkish ancestry and were genotyped for the GP Ia C807T/G873A polymorphism with real-time PCR method by LightCycler system. The 807 CC, CT and TT genotypes corresponded with 873 GG, GA and AA genotypes, respectively. Complete linkage between the 807 and 873 sites was found in all samples. The 807CC(873 GG), 807CT(873GA), 807TT(873AA) genotypes found to be 45.9%, 45.9% and 8.1% in controls and 30.0%, 55.0% and 15.0% in patients with Beh?et disease, respectively. The Odds Ratio for BD (OR = 1.97; 95% confidence interval (CI): 0.42-9.13) is high for the 807 TT genotype compared with controls. Thrombosis was found in 7 cases of Beh?et disease group: five cases have 807CT, one case has 807TT genotype and one case has 807CC genotype. Our data indicate hat patients with BD are affected by the glycoprotein Ia gene 807TT genotypes and carrying 807T allele. The risk of thrombosis is significantly higher in patients who have 807TT and 807CT genotypes than in patients who have 807CC genotype.     

基质金属蛋白酶9基因-1562C/T多态性与新疆维吾尔族心肌梗死的相关性研究

目的 探讨新疆维吾尔族人群基质金属蛋白酶9(matrix metalloproteinase 9,MMP9)基因启动子区-1562C/T多态性与心肌梗死(myocardialinfarction,MI)发病的相关性.方法 选择经皮冠状动脉造影检查确诊的维吾尔族心肌梗死患者347例(MI组),以同期冠脉造影阴性、排除冠心病诊断的403例维吾尔族患者为对照组.采用聚合酶链反应-限制性片段长度多态性方法对所有纳入对象MMP9基因-1562C/T多态性进行分析,比较两组间MMP9基因多态性频率分布的差异,并结合造影情况,探讨MMP9基因多态性与MI发病及冠脉狭窄程度的关系.结果 MI组CT+TT基因型频率(27.67%)明显高于对照组(14.14%),两组差异具有统计学意义(χ2=20.99,P＜0.01),T等位基因频率在MI组和对照组分别为15.71%、7.56%(χ2=24.57,P＜0.01).Logistic回归分析显示,携带-1562T等位基因的个体发生MI的风险大约升高2倍(OR=2.009,95%CI:1.250～3.230);携带T等位基因合并糖尿病的个体发生MI的风险明显升高(OR=3.714,95%CI:1.299～10.773).MMP9基因-1562C/T多态性分布与MI冠脉狭窄程度差异无统计学意义.结论 MMP9基因-1562C/T多态性可能与新疆维吾尔族人群MI茇病具有相关性;-1562T等位基因可能是MI遗传易感性的基因标记之一;-1562T等位基因与糖尿病在MI发生中具有协同作用.MMP9基因-1562C/T多态性与MI冠脉狭窄程度无关.

Abstract：

Objective To investigate the association between matrix metalloproteinase 9 gene (MMP9)- 1562C/T polymorphism and myocardial infarction (MI) in Uighur population of Xinjiang.Methods A total of 347 patients with MI evidenced by coronary arteriography, and 403 controls free from coronary artery disease with normal angiograms were recruited for the study. Polymerase chain reactionrestriction fragment length polymorphism (PCR-RFLP) was used to detect the -1562C/T functional promoter polymorphism of the MMP9 gene. The relationship between the polymorphism and the severity of coronary arterial stenosis was analyzed. Results The results showed that the frequency of CT and TT genotypes in patients with MI (27. 67%) was significantly higher than that in controls (14. 14%). The frequencies of the - 1562T allele were 15. 71% and 7. 56% in the MI group and the control group respectively (2 = 24.57, P＜0.01). Logistic regression analysis indicated that the T allele carriers (CT+TT) had significantly increased risk of MI compared with the CC carriers (OR=2. 009, 95%CI: 1. 250-3. 230). Individuals carrying the -1562T allele with diabetes mellitus were at an increased risk of MI (OR=3. 714, 95% CI: 1. 299-10. 773). The frequencies of CT and TT genotypes were not significantly different among MI patients with one, two and three or more significantly diseased vessels (χ2 =0. 491, P=0. 782). Conclusion The - 1562C/T polymorphism in the MMP9 gene promoter is associated with the susceptibility to MI in the Uighur population of Xinjiang. The T allele might be a risk factor of MI. And there was a coordinated effect between the -1562T allele and diabetes mellitus in the development of MI.The -1562C/T polymorphism may not be a predictor of the severity of coronary atherosclerosis.