E-选择素和白细胞介素6基因多态性与脑血栓形成之间的关系

脑血栓形成是多种原因引起的脑供血障碍,局部脑组织因缺血缺氧而出现坏死或软化等病理性改变。国内外大量研究表明,脑血栓形成的发病与遗传学基因多态性可能有着密不可分的联系。炎性因子在脑血栓形成的发生发展过程中起着很大的作用。E-选择素和白细胞介素6作为炎性因子的重要组成部分,它们的基因多态性可能成为脑血栓形成的重要危险因素。     

2型糖尿病患者血清脂联素水平及脂联素基因SNP45分析

目的:探讨2型糖尿病患者的血清脂联素水平及脂联素基因第45位点单核苷酸多态性(SNP45)分布状况.方法:采用放免法对180例2型糖尿病组(T2DM组)患者和144例对照组(Con组)人群进行血清脂联素水平测定,并用TaqMan探针技术进行脂联素基因SNP45分析.结果:T2DM组血清脂联素水平明显低于Con组(P＜0.05),T2DM组血清脂联素水平与各变量间的相关分析显示空腹血清脂联素水平与三酰甘油、空腹胰岛素原呈负相关,与HDL-C呈正相关;多元逐步回归分析显示:HDL-C是影响T2DM患者血清脂联素水平的独立相关因素.脂联素基因多态性分析:SNP45在T2DM组与Con组比较差异有统计学意义(P＜0.05),等位基因分布频率提示G等位基因在糖尿患者人群中多见(P＜0.05),糖尿病组中携带TG GG型的患者血清脂联素水平显著低于TT型的患者(P＜0.05).结论:糖尿患者群中G等位基因多见,携带等位基因G的患者血清脂联素水平降低,提示脂联素基因SNP45多态性与2型糖尿病发病有关.     

2型糖尿病抵抗素基因单核苷酸多态性(SNPs)及胰岛素抵抗相关因素研究

目的：研究内蒙古地区汉族2型糖尿病人抵抗素基因5’端调节区单核苷酸多态性（SNPs）及胰岛素抵抗、血脂关系。方法：对81名2型糖尿病患者（分肥胖、非肥胖2组）及40名非糖尿病患者抵抗素基因测序分析,比较3组间SNPs及胰岛素敏感指数（ISI）、甘油三酯（TG）、总胆固醇（TC）、高密度脂蛋白（HDL—C）。结果：3组抵抗素基因5’端调节区等位基因频率比较显示组间无统计学差异。糖尿病肥胖组和非肥胖组胰岛素敏感指数（ISI）与对照组比较,差异有显著性（均为P〈0．01）,糖尿病肥胖组和非肥胖组胰岛素敏感指数（ISI）比较差异也有显著性（P〈0．05）,糖尿病肥胖组和非肥胖组甘油三酯均高于对照组（均为P〈0．01）。糖尿病肥胖组和非肥胖组之间比较,差异也有显著性（P〈0．05）。糖尿病肥胖组血HDL—C低于糖尿病非肥胖组和对照组,差异有显著性（分别为P〈0．05,P〈0．01）,而糖尿病非肥胖组和对照组之间比较无统计学差异（P〉0．05）,糖尿病非肥胖组和对照组之间比较无统计学差异（P〉0．05）。结论：内蒙古地区汉族2型糖尿病人与抵抗素基因5’端调节区单核苷酸多态性（SNPs）没有显著相关性。胰岛素抵抗与肥胖密切相关。2型糖尿病脂代谢紊乱是甘油三酯紊乱合并HDL—C紊乱,与肥胖密切相关。     

Is KPNB3 Locus Associated With Schizophrenia？

Objective To reconfirm the association of KPNB3 with schizophrenia in Chinese population. Methods Two single nucleotide polymorphisms (SNPs), rs2588014 and rs626716 at the KPNB3 locus, were genotyped in 304 Chinese Han family trios consisting of fathers, mothers, and affected offsprings with schizophrenia. These 2 SNPs were detected by PCR-based restriction fragment length polymorphism (RFLP) analysis. The Hardy-Weinberg equilibrium for genotypic distributions was estimated by the goodness-of-fit test. The UNPHASED program was used to perform transmission disequilibrium test (TDT), haplotype analysis, and pair-wise measure of linkage disequilibrium (LD) between these 2 SNPs. Results The genotypic distributions of both rs2588014 and rs626716 were in the Hardy-Weinberg equilibrium (P>0.05). The TDT revealed allelic association with rs626716 (χ2 =9.31, P=0.0023) but not with rs2588014 (χ2 =3.44, P=0.064). The global P-value was 0.0099 for 100 permutations. The haplotype analysis also showed a disease association (χ2 =25.97, df=3, P=0.0000097). Conclusion The present study provides further evidence in support of the KPNB3 association with schizophrenia in Chinese population.     

ApoE、A2M、ACE基因与汉人Alzheimer病的相关性研究

目的 探讨山西汉族人群载脂蛋白E(apolipoprotein E,apoE)基因、a2-巨球蛋白(alpha-2 macroglobulin,A2M)基因、血管紧张素转换酶(angiotensin convening enzyme,ACE)基因多态性与Alzheimer病(AD)的相关性.方法 采用聚合酶链反应(PCR)、限制性片段长度多态性(RFLP)和电泳技术,观察山西汉族群体114例(AD患者55例,正常对照59例)的apoE基因、A2M基因、ACE基因多态性的分布并进行关联性分析.结果 AD组和对照组之间apoE各基因型分布总体比较其差异有统计学意义(P<0.05),其中ε4等位基因两组间比较存在明显统计学差异(P=0.000 2),且OR值大于5;AD组和对照组A2M各基因型、等位基因分布总体比较其差异有统计学意义(P<0.05).其中Ⅰ/Ⅴ基因型和Ⅴ等位基因与AD均呈显著正相关(Ⅰ/Ⅴ,基因型OR=2.85,95%CI=1.14-7.14;V等位基因OR=2.49,95%CI=1.05-5.89);两组间ACE各基因型及等位基因间的差异均无统计学意义(P>0.05).且按年龄、血压分层后AD组和对照组中ACE基因型及等位基因的分布差异无统计学意义;按是否携有apoE ε4分层后AD组和对照组A2M、ACE各基因型及等位基因两组分布均无差异(P>0.05).结论 apoE、A2M基因是晚发性AD的危险因子;AcE基因与晚发性AD不存在关联,还不能认为是晚发性AD的危险因子;且A2M基因、ACE基因与apoE基因无相互作用.     

抗原处理相关蛋白基因多态性及与变应性鼻炎的相关性

目的为变应性鼻炎患者行抗原处理相关蛋白基因(TAP)分型,探讨这些基因与变应性鼻炎遗传易感性的相关性.方法用PCR扩增阻碍突变系统(PCR-ARMS)为69例无亲缘关系的变应性鼻炎患者和92例无血缘关系的健康汉族人行TAP分型.结果TAPl-333、637位等位基因基因型在广东汉族变应性鼻炎组及正常对照组中均以Ⅰ和D为主,TAP2-379、565、665等位基因基因型分别为V-A-T.TAP1和TAP2各等位基因基因型频率在变应性鼻炎组和正常人组间差异无显著性(P＞0.05).结论变应性鼻炎与TAP基因可能无相关性.     

Lipoprotein lipase gene variants and progression of nephropathy in hypercholesterolaemic patients with type 2 diabetes

Objective. Recent prospective studies have identified hyperlipidaemia as an independent determinant of diabetic nephropathy. Lipoprotein lipase (LPL) is a key enzyme in the postprandial processing of triglycerides and VLDL. Among a number of common sequence variants of the LPL, HindIII has been associated with coronary heart disease and, more recently, with microalbuminuria in type 2 diabetes. We evaluated the progression of renal disease in hypercholesterolaemic type 2 diabetic patients in relation to this polymorphism. Design and subjects. We followed up for 4 years 65 consecutively enrolled microalbuminuric patients with type 2 diabetes; of whom 28 had hypercholesterolaemia (6.62 ± 0.9 mmol L^?1, group A) and 37 were normocholesterolaemic (4.68 ± 0.5 mmol L^?1, group B). Main outcome measures. After performing the genetic analyses, albumin excretion rate (AER) and estimated glomerular filtration rate (GFR), calculated by the simplified equation of the MDRD Study Group, were repeated every year. Results. In group A, AER increased more (?AER: 11 [38] vs. 4 [18] μg min^?1 per year in group B, P < 0.0001) while GFR declined faster (?3.5 ± 2.1 vs. ?2.0 ± 1.4 mL min^?1 per year, P < 0.02). Patients homozygous for the allele + of HindIII showed a significantly faster decline of GFR and a higher increase of AER (both P = 0.0001) even after adjustment for cholesterol levels and anthropometric variables. Conclusions. In hypercholesterolaemic type 2 diabetic patients with microalbuminuria, the renal disease has an accelerated course, particularly in those carrying the H₊/H₊ genotype of the HindIII polymorphism at the LPL locus.     

Dicarbonyl Electrophiles Mediate Inflammation-Induced Gastrointestinal Carcinogenesis

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Genetic polymorphisms of 15 STR loci in the population of the island of Cres (Croatia)

Background: The population of the island of Cres presents one of the few persisting Eastern Adriatic isolates and is thereby suitable for human population differentiation analyses.

Aim: The aim of this study was to analyse the genetic structure of the island of Cres with respect to its eight sub-populations and to compare the genetic variation of the island of Cres with other Eastern Adriatic islands and the Croatian mainland.

Subjects and methods: Fifteen AmpFlSTR identifiler loci were analysed in a sample group of 122 unrelated autochthonous individuals from the island of Cres, Croatia.

Results: Analysis of STR polymorphisms revealed genetic homogeneity among sub-populations of the island of Cres and small but significant levels of genetic heterogeneity among geographically distant Eastern Adriatic islands.

Conclusion: Despite a considerable degree of genetic homogeneity among the studied Eastern Adriatic islands, small but significant differentiation between distant islands indicates geographic sub-structuring which follows the isolation by distance model. This study is supportive of the notion that STR markers are useful for genetic differentiation between larger and geographically more distant regions.