汉族人群胆固醇酯转运蛋白基因和C反应蛋白基因多态性与非瓣膜性房颠的关联

目的 研究胆固醇酯转运蛋白(cholesteryl ester transfer protein,CETP)基因TaqIB、C反应蛋白(C reactive protein,CRP)基因1444C/T单核苷酸多态性(single nonucleotide polymorphism,SNP)与汉族非瓣膜性房颤的相关.方法 选取非瓣膜性房颤患者147例、病例对照147例,应用聚合酶链反应-限制性内切酶片段长度多态性鉴定基因型.结果 CETP TaqIB(P=0.005,OR=0.614,B=-0.488)和CRP 1444C/T(P=0.003,OR=2.428,β=0.887)遗传多态性在病例组和对照组间差异有统计学意义.根据性别分组:女性组,吸烟、CETP TaqIB、CRP 1444C/T病例对照间差异有统计学意义;男性组,体重指数和CETP Taq IB病例对照间差异有统计学意义.结论 中国汉族CETP TaqIB (B2等位基因为保护性因子)和CRP1444C/T(T等位基因为危险因子)多态性可能与非瓣膜性房颤相关.吸烟、CRP 1444C/T多态性可能增加女性非瓣膜性房颤遗传易感性;肥胖可能增加男性非瓣膜性房颤遗传易感性.     

Functional interaction between -629C/A, -971G/A and -1337C/T polymorphisms in the CETP gene is a major determinant of promoter activity and plasma CETP concentration in the REGRESS Study

Cholesteryl ester transfer protein (CETP) plays a key role in the determination of high-density lipoprotein (HDL) levels via its action on intravascular HDL metabolism. The TaqIB polymorphism of the CETP gene is associated with plasma CETP and high-density lipoprotein cholesterol (HDL-C) levels and with premature coronary artery disease. Such associations appear to result from linkage disequilibrium between TaqIB and other functional polymorphisms. To date, only one functional promoter variant, which may explain the effects of TaqIB, has been identified at position -629 in the CETP gene. Here we describe a C/T polymorphism located at position -1337 in the human CETP gene (C allele frequency: 0.684), which is significantly associated with plasma HDL-C and CETP levels (P=0.0001 and P<0.0001, respectively). Transient transfection of a reporter gene construct containing the CETP promoter from -1707/+28 in liver cells (HepG2) revealed that the -1337T allele was expressed to a significantly lower degree (-34%, P<0.0001) than the -1337C allele. In addition, we clearly demonstrated that the -971G/A polymorphism is functional and that its functionality is intimately linked to the presence of the -1337 site. In vitro evaluation of potential interaction between -1337C/T and other functional variants of the CETP gene (-971G/A and -629C/A) demonstrated that these three functional CETP promoter polymorphisms can interact together to determine the overall activity of the CETP gene and thus contribute significantly to variation in plasma CETP mass concentration.     

海南汉、黎族正常人群胆固醇酯转运蛋白基因的多态性

 目的 了解海南汉、黎族正常人群CETP基因TaqIB、I405V、D442G、R451Q、A373P和I14A 6种多态位点频率的分布情况。方法 应用等位基因特异性PCR,分析海南汉、黎族正常人群CETP基因。结果 在海南汉、黎族正常人群中,TaqIB 、I405V和D442G多态位点可分别检测出B1B1、B1B2、B2B2 3种基因型,II、IV、VV 3种基因型和DD、DG 2种基因型,未检测到R451Q、A373P和I14A3种突变类型。I405V多态位点的基因型分布（P<0.0001）和等位基因频率（P<0.0001）在2组人群之间存在显著性差异,其余多态位点无统计学意义。结论 CETP基因TaqIB、I405V和D442G多态位点是海南汉、黎族正常人群中的常见突变位点,且I405V多态位点在2组人群之间存在明显的种族差异,R451Q、A373P和I14A 3种突变在海南汉、黎族人群中非常罕见。     

Haplotype analyses of cholesteryl ester transfer protein gene promoter: a clue to an unsolved mystery of<Emphasis Type="Italic"> Taq</Emphasis>IB polymorphism

Cholesteryl ester transfer protein (CETP) mediates the transfer of cholesteryl esters from HDL to triglyceride-rich lipoproteins. TaqIB polymorphism (B2 allele) identified in intron 1 is associated with lower plasma CETP concentrations and higher HDL cholesterol levels and may play an antiatherogenic role in humans. However, its molecular mechanism remains unclear. To evaluate the association between the promoter polymorphisms and CETP/HDL cholesterol levels, ten novel and three previously reported polymorphisms located within 3.3 kb of the CETP gene promoter were investigated in a sample of 357 elderly Japanese men. All the promoter polymorphisms were in linkage disequilibrium with each other and with TaqIB. The -2505A allele, the "S" allele of the [gaaa](n) repeat ("S" denotes [gaaa](n)=329 bp and longer, "L" denotes >329 bp) and TaqIB2 allele were significantly associated with both lower plasma CETP concentrations and higher HDL cholesterol levels whereas -971G/A and -629A/C were significantly associated with CETP concentrations but not with HDL-C levels. The 12-polymorphism haplotypes consisting of -2804, -2505, [gaaa](n), -1930, -1674, -1129, -1046, -971, -875, -827, -629, and TaqIB were analyzed. These 12 polymorphisms generated eight main haplotypes, accounting for 86% of the observed haplotypes. The G/A/S/T/T/C/T/A/C/C/A/B2 haplotype was significantly associated with lower CETP concentrations (2.0+/-0.6 micro g/ml) and higher HDL cholesterol levels (55.1+/-12.7 mg/dl) than the other seven main haplotypes. The 5- and 3-polymorphism haplotype analyses consisting of -2505 and the [gaaa](n) repeat indicated the -2505C/A polymorphism might explain the variation in the CETP concentrations best, and the [gaaa](n) repeat and/or the -2505C/A polymorphism may independently determine the variation in HDL cholesterol levels, whereas the -629A/C and TaqIB polymorphisms were not instrumental in determining CETP concentrations as well as HDL cholesterol levels, although the latter has been frequently examined in many association studies.     

The TaqIB and -629C>A polymorphisms at the cholesteryl ester transfer protein locus: associations with lipid levels in a multiethnic population. The 1998 Singapore National Health Survey

The Singapore population comprises Chinese, Malays and Asian Indians. Within this population, Asian Indians have the highest rates of coronary heart disease, whereas Chinese have the lowest. Conversely, Indians have the lowest high-density lipoprotein cholesterol (HDL-C) concentrations, followed by Malays and Chinese. We studied the TaqIB and -629C>A polymorphisms at the CETP locus in 1300 Chinese, 364 Malay and 282 Asian Indian men, and in 1558 Chinese, 397 Malay and 306 Asian Indian women, to determine whether these polymorphisms are responsible for the ethnic difference in HDL-C concentration. The frequency of the B2 allele in Chinese, Malays and Indians was 0.384, 0.339 and 0.449 in men, and 0.379, 0.329 and 0.415 in women, respectively (p < 0.001). For the A-629 allele, the relative frequencies were 0.477, 0.423 and 0.592 in men and 0.486, 0.416 and 0.575 in women (p < 0.001). The two polymorphisms were in linkage disequilibrium (D / Dmax= 0.9772, p < 0.00001). The B2 and the A-629 alleles were associated with increased HDL-C concentrations in a dose-dependent manner. The B2 allele continued to show an association with HDL-C concentration, even after controlling for the genotype at position -629. Dietary cholesterol showed a significant interaction with the TaqIB polymorphism in determining HDL-C concentrations in Indians and Malays, but not in Chinese. In conclusion, the high frequencies of these polymorphisms in Asian Indians could not explain the observed ethnic differences in HDL-C concentration. Moreover, we observed an ethnic-specific interaction among dietary cholesterol, the TaqIB polymorphism and HDL-C concentrations.     

广东省汉族人群与西藏自治区夏尔巴人群SP-A基因单核苷酸多态性研究

目的：通过对肺表面活性物质相关蛋白A（surfactantproteinA，SP-A）基因单核苷酸多态性（single nucleotide polymorphism，SNP）在广东汉族人群和西藏夏尔巴人群中的分布特点的分析，探讨其与高原低氧环境适应性的关系。方法：应用序列特异性引物-聚合酶链反应（polymerase chain reacion-sequencespecific primer，SSP-PCR）方法，对90名广东汉族人和104例西藏夏尔巴人SP-A基因进行检测。结果：在104例夏尔巴人和90名汉族人之间SP-A1基因1544位点各基因型和等位基因分布无统计学差异（P〉0．05）；在SP-A1基因3241位点C／C，C／T和T／T3种基因型的构成比在夏尔巴人分别为75．0％，22．1％和2．9％，而广东汉族人群为50，0％，35．6％和14．4％，夏尔巴人等位基因C、T的分布频率为86．1％和13．9％，而广东汉族为67．8％和32．2％，sP-A13241基因型和等位基因分布频率在两组之间比较差异有统计学意义（P〈0．05）；在SP-A2基因3265位点夏尔巴人C／C，A／C和A／A3种基因型的构成比分别为37．5％，53．8％和8．7％．广东汉族为63．3％，30．O％和6．7％，两组比较差异有统计学意义（P〈0．05），而且夏尔巴人等位基因C、A的分布频率为64．4％和35．6％，而广东汉族人群为78．3％和21．7％，两组比较差异有统计学意义（P〈0．05）。结论：夏尔巴人SP-A2基因的3265位点基因型和等位基因分布与广东汉族人均有显著性差异，该位点SNP可能与夏尔巴人对高原低氧适应有关。     

中国汉族人群白细胞介素10启动子区基因多态性的等位基因频率

目的：了解中国汉族人群中白细胞介素10（IL-10）启动子区基因多态性的等位基因频率。方法：应用聚合酶链-限制性片段长度多态性分析（PCR—RFLP）技术,对131例健康中国汉族受检样本进行IL-10592、819、-1082三个位点的基因型检测。结果：IL-10-592位点A／A、C／A、C／C基因型频率分别为42．7％、36．6％、20．7％,IL-10 -819位点T／T、T／C、C／C基因型频率分别为42．7％、36．6％、20．7%;其相关等位基因频率与意大利高加索人及英国曼彻斯特人相比有显著性差异,但与韩国人之间的差异无统计学意义。结论：不同国家人群间存在IL-10启动子区基因多态性的差异。     

新疆维吾尔族、汉族阿尔茨海默病LRP基因766C/T多态性关联分析

目的 探讨新疆地区维吾尔族、汉族低密度脂蛋白受体相关蛋白基因(low density lipoproteinreceptor-related protein gene,LRP)766C/T多态性与阿尔茨海默病(Alzheimer's disease AD)的关系.方法 对新疆地区维吾尔族、汉族≥50岁8284名人群进行AD流行病学调查,参照ADRDA-NINCDS的标准,选取AD患者209例与正常对照220名,应用聚合酶链反应-限制性片段长度多态技术检测LRP基因766C/T多态性,采用病例-对照的关联分析方法进行基因型和等位基因频率分析.结果 (1)新疆维吾尔族、汉族之间LRP基因的基因型和等位基因分布频率差异有统计学意义(P<0.05).(2)汉族病例组与对照组间基因型和等位基因频率分布差异有统计学意义(P<0.05).(3)在年龄≥65岁的病例组与对照组间基因型和等位基因频率分布差异有统计学意义(P<0.05),且此年龄组携带C等位基因的个体发生AD的危险性显著增加(OR=1.98,P<0.05).(4)在女性病例组中C/C基因型分布频率和C等位基因频率显著高于对照组(P<0.05),女性携带C等位基因的个体发生AD的危险性显著增加(OR=2.927,P<0.05).结论 新疆维吾尔族和汉族之间LRP,基因766C/T多态性存在差异,并发现在汉族、年龄≥65岁及女性人群中LRP基因766C/T多态性与AD的发病风险存在关联.     

Lack of association of the common TaqIB polymorphism in the cholesteryl ester transfer protein gene with angiographically assessed coronary atherosclerosis

The anti-atherogenic effect of cholesteryl ester transfer protein (CETP) genetic variants associated with lowered enzyme activity is controversial. Moreover, in a few studies, this effect has been evaluated in the presence of a certain risk factor constellation. We addressed this issue in a case-control study, where 415 subjects with angiographically documented coronary artery disease (CAD +), 397 subjects without CAD (in 215, CAD was excluded by coronarography (CAD-)), and 188 healthy population controls, were screened for the CETP TaqIB polymorphism. The prevalence of the low-activity TaqIB2 allele was 0.396 in CAD+, and 0.428 and 0.416 in CAD- and population controls, respectively (p = 0.40). Its presence was significantly associated with increased high-density lipoprotein cholesterol (HDL-C) in population controls (1.40 +/- 0.40 mmol/l in B1B1, 1.52 +/- 0.39 mmol/l in B1B2 and 1.58 + 0.46 mmol/l in B2B2; p < 0.03 for trend), but not in the other groups. The CETP TaqIB polymorphism accounted for < 1% of the HDL-C variance in the whole cohort (p = 0.048). After adjustment for other risk factors, the CETP TaqIB2 allele was found not to be associated with significant changes in CAD risk independently of an assumed either dominant (odds ratio (OR) 0.97; 95% confidence interval (CI) 0.66-1.44; p = 0.89) or recessive effect (OR 0.68; 95% CI 0.42-1.12; p = 0.13). The CETP TaqIB polymorphism did not show a significant interaction with other risk factors in influencing CAD risk. Our findings do not support the hypothesis that a genetic variant resulting in lowered CETP activity is associated with reduced risk of coronary atherosclerosis.     

江苏汉族人群XRCC1基因的遗传多态性研究

目的探讨江苏省汉族正常人群中X线修复交叉互补基因1（XRCC1）常见的两个单核苷酸多态（SNPs）C26304T和G27466A的遗传分布特点。方法采用聚合酶链反应（PCR）及限制性片段长度多态（RFLP）方法分析江苏省扬中地区511名健康汉族人的XRCC1基因C26304T和G27466A的基因多态性。结果511名江苏汉族人的XRCC1 C26304T基因型CC、CT、TT的频率分别为45．8％、42．7％和11．5％,等位基因C、T的频率分别为67．1％和32．9％。G27466A基因型GG、GA、AA的频率分别为68．9％、29．0％和2．1％,等位基因G、A的频率分别为83．4％和16．6％。江苏人群的C26304T基因型频率和等位基因频率分布与浙江、台湾人群均无明显差异（P〉0．05）,但与意大利人、美国白人、美国黑人的差异具有显著性（P〈0．05）。江苏人群的G27466A基因型频率和等位基因频率分布与浙江人、台湾人、意大利人、美国白人、美国黑人的差异均具有显著性（P〈0．05）。结论本研究揭示了江苏汉族人群XRCC1基因C26304T和G27466A的等位基因频率和基因型频率分布特点;证实了C26304T和G27466A位点的等位基因和基因型频率存在种族、地区差异。     

汉族人群一氧化氮合酶基因三个位点单核苷酸多态性与静息心率相关性研究

目的研究汉族人群的一氧化氮合酶（nitric oxide synthase，NOS）基因NOS3-922A／G和NOS3 894G／T以及NOS2-1173C／T3个位点的单核苷酸多态性（single nucleotide polymorphisms，SNP）与静息心率的相关性。方法随机选择自然人群个体211名为研究对象，获取其静脉血白细胞基因组DNA。用等位基因特异性引物PCR技术检测NOS3-922A／G、NOS3 894G／T、NOS2-1173C／T的SNP。结果NOS3-922A／G的AA、AG、GG，NOS3 894G／T的GG、GT和TT与NOS2-1173C／T的CC、CT和TT各基因型频率分布，均符合Hardy-Weinberg平衡（P〉0．05）。NOS3-922A／G各等位基因AA、AG、GG静息心率比较，发现携带从等位基因者静息心率较GG者高，差异有统计学意义（P〈0．01）。NOS3 894G／T各等位基因静息心率比较，发现携带GG等位基因者静息心率较TT者高，差异有统计学意义（P〈0．05）。NOS2-1173C／T各等位基因的静息心率比较，差异均无统计学意义（P〉0．05）。结论NOS3-922A／G与NOS3 894G／TSNP突变型其静息心率较野生型降低，提示上述位点SNP可能与其静息心率有相关性。     

血管紧张素原基因的六种单核苷酸多态与原发性高血压的相关性

目的　研究血管紧张素原 (angiotensinogen,AGT)基因 6个位点的单核苷酸多态及其构成的单倍型与中国汉族人原发性高血压的相关性。方法　采用多重SNa Pshot反应 ,在 185例原发性高血压患者和185名健康对照者中 ,对 AGT基因启动子区域的 G- 2 17A、G- 15 2 A、A- 2 0 C、G- 6 A及第 2外显子的T174 M和 M2 35 T多态进行基因分型。结果　 6种单核苷酸多态的基因型分布及其等位基因频率在原发性高血压组和对照组中差异无显著性 (P>0 .0 5 )。单倍型分析提示由 - 15 2 A,- 2 0 C,- 6 A和 2 35 T等位基因构成的 H4单倍型在原发性高血压组中明显增加 ,与对照组相比差异有显著性 (P<0 .0 5 )。结论　AGT基因G- 15 2 A,A- 2 0 C,G- 6 A和 M2 35 T多态可能对中国汉族人原发性高血压的发病起了重要作用。     

肿瘤坏死因子α基因启动子区域-1031T/C多态与不稳定性心绞痛的相关性

目的 研究肿瘤坏死因子α(tumor necrosis factor-alpha,TNF-α)基因启动子区域-1031T/C多态与汉族不稳定性心绞痛的相关性.方法 采用MALDI-TOF质谱检测方法,在299例不稳定性心绞痛患者和202名健康对照者中,对TNF-α基因启动子区域的T-1031C多态进行基因分型,并采用酶联免疫吸附实验(enzyme-linked immunosorbent assay,ELISA)法测定其血清浓度.结果 -1031T/C多态的基因型分布及其等位基因频率在两组间相比差异均无统计学意义(P>0.05).但在男性不稳定性心绞痛患者中,其CC、TC和TT基因型分布与对照组相比有统计学意义(P=0.032),男性CC+TC携带者,不稳定性心绞痛的发病危险是TT携带者的1.66倍(95%CI:1.040～2.659).其等位基因频率在两亚组间相比差异无统计学意义(P>0.05).不稳定性心绞痛组的血清TNF-α浓度明显高于对照组(P=0.028,尤其男性亚组P=0.013),TC基因型的血清TNF-α浓度高于其他基因型,但差异无统计学意义(P>0.05).结论 TNF-α基因启动子区域的-1031T/C多态可能与男性不稳定性心绞痛的发生相关,尤其是男性C等位基因携带者.     

Interleukin-10 promoter polymorphisms in Chinese patients with Parkinson's disease

Interleukin-10 (IL-10), an important anti-inflammatory cytokine, may influence the risk for the development of onset of sparadic Parkinson's disease (PD) in the inflammatory process. In this study, two DNA polymorphisms at IL-10 gene promoter (-819 T/C and -592 A/C) were examined in 355 sporadic PD patients and 200 healthy controls in Han Chinese Population. For both polymorphisms, no significant difference in genotype or allele distribution was found between PD patients and the controls. For -819 T/C polymorphisms, there was significant difference in genotype distribution between EOPD (EOPD, <50 years of age) patients and each healthy-matched control subgroup (P=0.011), as well as between female PD patients and each healthy-matched control subgroup (P=0.024), For -592 A/C polymorphisms, there were no significant gender- and age-related differences in genotype distribution between PD patients and the controls subgroup. Results from our study revealed that the IL-10 promoter (-819 and -592) polymorphism is not a risk factor of sporadic Parkinson's disease, but the IL-10 promoter -819 polymorphism is a risk factor of EOPD and female PD patients in Han Chinese population.     

IL-2基因多态性与中国汉族人群特发性扩张型心肌病的相关性研究

目的 研究中国西南地区汉族特发性扩张型心肌病(idiopathic dilated cardiomyopathy,IDCM)患者白细胞介素-2(interleukin-2,IL-2)基因启动子区-384T/G、-475A/T、-631G/A多态性与IDCM的相关性.方法 采用聚合酶链反应-限制性片段长度多态性技术分析中国西南地区无血缘关系的109例汉族IDCM患者和210名正常对照者IL-2基因启动子区-384、-475、-631位点的单核苷酸多态性.结果 IL-2基因启动子区-384位点TT+TG基因型频率和T等位基因频率在IDCM患者中升高,与正常对照组相比差异有统计学意义(分别为95.41%vs.87.62%,P=0.042和72.94%vs.64.52%,P=0.039);而IL-2基因-631位点与-475位点基因型和等位基因频率在IDCM组与正常对照组之间无差异.结论 IL-2基因启动子区单核苷酸多态性与人类IDCM相关,IL-2基因启动子区-384位点T等位基因可能会增加发生IDCM的危险性.     

中国人自身免疫性肝病相关性 CTLA-4基因多态性研究

目的　探讨细胞毒性 T细胞相关抗原 - 4 (cytotoxic T lymphocyte- associated antigen- 4 ,CTL A- 4 )基因启动子 - 318和第 1外显子区第 4 9位基因多态性与中国人自身免疫性肝炎 (autoimmunehepatitis,AIH)、原发性胆汁性肝硬化 (primary biliary cirrhosis,PBC)发病的相关性。方法　应用限制性片段长度多态性方法分析 6 2例 AIH和 77例 PBC患者外周血单核细胞基因组 DNA CTL A- 4启动子 -318T/ C、第 1外显子区第 4 9位基因 A/ G多态性 ,并与 16 0名正常对照比较。结果　 AIH组 CTL A- 4启动子 - 318位 T/ C基因型分布与对照组比较差异无显著性 ,但 C等位基因频率明显高于正常对照组 (P=0 .0 2 ,OR=2 .4 3)。 PBC患者 CTL A- 4第 1外显子区第 4 9等位基因分布与正常对照组比较差异非常显著(P=0 .0 0 6 ) ,PBC患者 G等位基因频率明显高于正常组 (P=0 .0 0 4 6 ,OR=1.8)。联合分析 CTL A- 4启动子与第 1外显子的基因多态性分布 ,虽然 AIH组和 PBC组 GG- CC型携带率均比正常人高 (AIH组 :32 .3% ,PBC组 :37.7% ,对照组 :2 2 .5 % ) ,但是统计学分析结果均显示两组患者与正常人差异无显著性。结论　 CTL A- 4启动子 - 318和第 1外显子区第 4 9位基因多态性可能与中国人 AIH、PBC易感性相关。     

Association between TRAIL gene polymorphisms and the susceptibility and severity of lumbar disc degeneration

Aim: The aim of the present study was to investigate the association between tumor necrosis factor related apoptosis-inducing ligand (TRAIL) gene polymorphisms and the susceptibility and severity of lumbar disc degeneration (LDD) in the Chinese Han population. Methods: A total of 153 patients with LDD and 131 healthy subjects were enrolled in the study. Four single-nucleotide polymorphisms (SNPs) in the 3’ untranslated region (3’UTR) of TRAIL gene, including 1289 C/A, 1525 G/A, 1588 G/A and 1595 C/T, were genotyped with polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis. Results: The genotypes and alleles frequencies of TRAIL at 1525 and 1595 positions in all subjects were the same. There was a significant association between TRAIL 1525/1595 polymorphisms and the susceptibility of LDD. The frequencies of 1525 GG /1595 CC genotype, and 1525 G/1595 C allele were higher in the patients group than that in the control group. In addition, we found patients with the 1525 AA /1595 TT genotype, as well as 1525 A/1595 T allele exhibit significantly low frequency of high grades of disc degeneration. However, there were no significant differences in the genotype or allele distribution of TRAIL 1289 C/A or 1588 G/A between the patients and the control group. Conclusion: TRAIL 1525/1595 polymorphisms were associated with the susceptibility and severity of LDD in the Chinese Han population.     

The polymorphism of heat shock protein 70 genes in Chinese Han population in Fujian province

Heat shock protein 70 (HSP70) genes are themost important and conserve gene members intheheat shock protein family,and locate in an areaadjacent tothe TNFgenesinthe classⅢregionofmajor histocompatibilitycomplex(MHC) .Its geneproductsHSP70proteins are encoded by 3 differ-ent genes ,HSP70-1,HSP70-2andHSP70-hom.Previous studies showed that three kinds ofpolymorphisms existin3loci of thesethree genes ,i .e .+190 G/CBsrBⅠrestrictionsite onHSP70-1, +1267 A/GPstⅠrestriction site onHSP…     

泛素羧基端水解酶-L1基因两种多态与帕金森病发病的相关性

目的 探讨泛素羧基端水解酶-L1基因(ubiquitin carboxy-terminal hydrolase-L1,UCH-L1)第3外显子C/A多态、第4外显子C/T多态与帕金森病(Parkinson's disease,PD)发病风险的关系.方法 采用聚合酶链反应-限制性片段长度多态性方法,在164例PD患者和172名健康对照者中观察UCH-L1基因C/A和C/T多态的分布,并通过比值比(odds ratio,OR)进行相关分析.结果 (1)PD患者中UCH-L1第3外显子上C等位基因的频率(62.2%)明显高于对照组(51.7%)(OR=1.53,P=0.006),PD患者CC基因型的频率(36.6%)亦明显高于对照组(23.2%)(OR=1.90,P=0.008).(2)PD患者中UCH-L1第4外显子上C/T等位基因和基因型的频率分布在PD患者和对照组间差异无统计学意义.结论 UCH-L1第3外显子上c等位基因可能是PD发病的危险因子,而第4外显子上的C/T多态则与PD发病无关.     

Association study between 834+7G/A and +1332C/T polymorphisms in the growth arrest specific 6 gene and risk of severe preeclampsia in Chinese population北大核心CSCD

Objective To investigate the relationship between polymorphisms of the growth arrest specific 6 (GAS6)gene and severe preeclampsia in a South West Han Chinese population. Methods Blood samples from 167 patientswith severe preeclampsia and 312 normal pregnant women as controls from Han Chinese in Chengdu area wereanalyzed by polymerase chain reaction-restriction fragment length polymorphisms. Results C and T allelefrequencies for +1332C/T site were 85. 63% and 14. 37% in the patient group, respectively, and 78. 04% and 21.96% in control group, respectively. The TT genotype and variant T allelic frequencies of the + 1332C/Tpolymorphism were significantly lower in patients with severe preeclampsia than in the control group (both P< 0. 05), and the odds ratio for the risk of severe preeclampsia was 0. 602 (95% CI: 0. 401-0. 904) incarriers for the variant T allele (x2 = 6. 045, P = 0.014). G and A allele frequencies for 834 +7G/A site were 72. 75% and 27. 25% in case group, respectively, and 74. 36% and 25. 64% in control group,respectively. The genotype and allele frequencies of the 834 + 7G/A polymorphism in patients with severe preeclampsia and controls showed no significant differences (both P>0. 05). In addition, there was no significant association between the polymorphisms and blood pressure levels in the patient or control groups. Conclusion The variant GAS6 +1332 T allele is associated with a decreased risk for severe preeclampsia in a South West Han Chinese population. On the other hand, the 834 + 7G/A polymorphism has no effect on the severe preeclampsia.