阿尔茨海默病精神症状与载脂蛋白E基因多态性相关性研究

目的探讨载脂蛋白E基因与中国昆明地区汉族人阿尔茨海默病精神症状是否存在关联。方法运用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)分析方法,对58例无亲缘关系的中国昆明地区阿尔茨海默病患者及96例健康老年人,进行载脂蛋白E基因变异检测;采用神经精神量表(Neuropsychiatric Inventory Caregiver Distress Scale,NPI)评定患者的精神症状。结果AD组ε3/ε4基因型频率及ε4等位基因频率明显高于对照组(P<0.05);发现有妄想、抑郁心境、攻击行为症状组的ε4/x基因型频率及ε4等位基因频率高于无症状组,有幻觉症状组的ε4/x基因型频率及ε4等位基因频率低于无症状组,差异比较经χ2检验,均无统计学意义。结论ε4基因可能是AD的风险基因;ApoEε4等位基因与AD精神症状的发生并无关联。     

载脂蛋白E基因多态性与中国人阿尔茨海默病和颈动脉粥样硬化相关性研究

为了探讨中国散发性阿尔茨海默病（SAD)颈动脉粥样硬化（CAS）与ApoE基因多态性的关系,应用聚合酶链式反应－限制性片段长度多态性（PCR－RFLP）技术检测46名SAD患者、31名CAS患者及50名正常老年人的ApoE基因多态性分布特征。结果显示SAD组及CAS组ApoE ε4等位基因频率均高于对照组（P＜0．05）;SAD组为15．2％,CAS组为14．5％,对照组为3．0％,但CAS组ApoEε2等位基因频率明显高于SAD组（P＜0．05）;CAS组为41．9％,SAD组为21．7％本研究提示,ApoE4等位基因是SAD和CAS的共同危险因素,但ApoE2等位基因对CAS病人患AD具有保护作用。     

冠心病家族史青少年载脂蛋白E、B的基因多态性

目的 探讨青少年载脂蛋白E(apolipoprotein E，apoE)、apoB基因多态性对冠心病的遗传易感性。方法 应用聚合酶链反应—限制性片段长度多态性技术，对244名健康汉族大学生(冠心病家族史阳性者109人，阴性者135人)的apoE、apoB XbaI、apoB 3’可变数目串联重复序列(variable number of tandem repeat ，VNTR)基因型进行分析。结果 阳性组的e4、x^ 、VNTR—B(hypervariable element，HVE＞38)等位基因频率显著高于阴性组(P＜0．05)，且与血总胆固醇、低密度脂蛋白—胆固醇、aPoBl00水平升高有显著相关(P＜0．05)。结论 apoE的e4、apoB Xba I的x^ 、apoB3’VNTR的VNTR—B可能为冠心病的重要遗传标记。     

载脂蛋白E基因多态性与Alzheimer病的关系探讨

目的：探讨Alzheimer病（Alzheimer disease,AD)患者的载脂蛋白E(apolipoproteinE,APOE)基因的分布,及其相关性。方法：利用聚合酶链反应－限制性片段长度多态性（PCR－RFLP）技术对AD患者和相应健康对照的APOE基因进行分型,从而进行AD与APOE等位基因多态性的关联分析。结果：AD病人APOE等位基因。ε4占20．74％,明显高于正常人对照组的7．64％,而ε3则占64．63％,低于正常人对照组的84．12％。结论：APOE等位基因中,ε4可能为AD的易患因子,而ε则为保护因子。     

载脂蛋白E基因多态性与 Alzheimer病的关系探讨

目的 探讨Alzheimer病(Alzheimer disease,AD)患者的载脂蛋白E(apolipoproteinE,APOE)基因的分布,及其相关性.方法 利用聚合酶链式反应-限制性片段长度多态性(PCR-RFLP)技术对AD患者和相应健康对照的APOE基因进行分型,从而进行AD与APOE等位基因多态性的关联分析.结果 AD病人APOE等位基因.ε4占20.74%,明显高于正常人对照组的7.64%,而ε3则占64.63%,低于正常人对照组的84.12%.结论 APOE等位基因中,ε4可能为AD的易患因子,而ε3则为保护因子     

APOE基因多态性与阿尔茨海默病关系研究的进展

载脂蛋白E(apolipoprotein E,APOE)基因在阿尔茨海默病(Alzheimer disease,AD)的研究中起着重要作用,已经明确APOE基因与老年性痴呆病关系密切。近年来,人们利用分子生物学技术对普通人群及患者APOE基因多态性与AD的关系进行了广泛的研究。笔者就此领域的研究进展做一综述,以期为AD相关研究提供基础信息。     

新疆维吾尔族阿尔茨海默病患者脑啡肽酶基因与载脂蛋白E基因多态性的关联分析

目的 探讨脑啡肽酶(neprilysin,NEP)基因rs3736187位点突变及其与载脂蛋白E(apolipoprotein E,ApoE)基因相互作用在新疆维吾尔族人群散发性阿尔茨海默病(sporadic Alzheimer disease,SAD)发病机制中的作用.方法 应用聚合酶链反应-限制性片段长度多态性方法 检测了111例维吾尔族SAD患者和117名维吾尔族正常老年人NEP基因和ApoE基因多态性分布特征.结果 (1)NEP基因T等位基因频率在AD组高于对照组(x2=5.005,P＜0.05),携带T等位基因个体出现AD的危险性高于携带C等位基因的个体.(2)ApoE基因ε4等位基因频率AD组高于对照组(x2=4.218,P＜0.05),携带ε4等位基因个体出现AD的危险性高于未携带ε4等位基因的个体.(3)NEP基因的T等位基因与SAD发病相关且不受ApoE基因型影响.结论 NEP基因和ApoE基因的基因多态性与新疆维吾尔族SAD发病有关联.NEP基因可能是新疆维吾尔族SAD发病独立的易感基因.     

载脂蛋白E基因多态性与疾病的相关性研究

载脂蛋白E（ApoE）是一种重要的血浆脂蛋白,由3种等位基因构成：E2、E3和E4。ApoE作为一种载脂蛋白,在脂质运输和代谢过程中发挥重要作用,而目前越来越多的研究表明：ApoE在免疫调节方面发挥重要作用,从而参与到多种疾病的发生发展中。近年来发现,ApoE及其基因多态性与高脂血症、动脉粥样硬化、Alzheimer病、神经系统病变及脓毒血症等人类疾患的发生发展有着密切关系。     

新疆维吾尔族阿尔茨海默病患者脑啡肽酶基因与载脂蛋白E基因多态性的关联分析

Objective To assess the association between the neprilysin (NEP) gene and apolipoprotein E (ApoE) gene polymorphisms and sporadic Alzheimer' disease (SAD) in Xinjiang Uygur population. Methods The polymorphisms of the NEP and ApoE gene were determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) in 111 SAD patients and 117 healthy controls. Results (1) The frequency of the T allele in the NEP gene was significantly higher in the SAD patients than that in the controls (x2 =5.005, P＜0.05);and there was higher risk to develop SAD in the T allele carriers. (2) The frequency of the ApoE 4 ε4 allele was higher in the SAD patients than in the controls (x2 =4. 218,P＜0.05);and the ApoE 4 ε4 carriers had significantly increased risk of developing SAD. (3)No significant interaction was found between the NEP and ApoE polymorphisms in SAD patients.Conclusion The NEP and ApoE gene polymorphisms may be associated with SAD. NEP gene may be an independent genetic risk factor for SAD in Xinjiang Uygur population.     

新疆维吾尔族阿尔茨海默病患者脑啡肽酶基因与载脂蛋白E基因多态性的关联分析

Objective To assess the association between the neprilysin (NEP) gene and apolipoprotein E (ApoE) gene polymorphisms and sporadic Alzheimer' disease (SAD) in Xinjiang Uygur population. Methods The polymorphisms of the NEP and ApoE gene were determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) in 111 SAD patients and 117 healthy controls. Results (1) The frequency of the T allele in the NEP gene was significantly higher in the SAD patients than that in the controls (x2 =5.005, P＜0.05);and there was higher risk to develop SAD in the T allele carriers. (2) The frequency of the ApoE 4 ε4 allele was higher in the SAD patients than in the controls (x2 =4. 218,P＜0.05);and the ApoE 4 ε4 carriers had significantly increased risk of developing SAD. (3)No significant interaction was found between the NEP and ApoE polymorphisms in SAD patients.Conclusion The NEP and ApoE gene polymorphisms may be associated with SAD. NEP gene may be an independent genetic risk factor for SAD in Xinjiang Uygur population.     

α2-巨球蛋白基因I1000V多态性与散发阿尔茨海默氏病的关联研究

目的近年来有研究发现α2-巨球蛋白基因(α2-macroglobulin，A2M)Ile1000Val多态与阿尔茨海默氏病(Alzheimer’s disease，AD)发病有关联，但也有相悖的研究结果报道。因此．我们利用较大的样本，观察了A2M基因Ile1000Val多态在广州及成都地区汉族老年人中的分布，并探讨其与散发AD的相关性。方法以广州地区257例散发AD患者和242名正常老年人、成都地区112例散发AD患者和113名正常老年人为对象进行病例一对照研究。用聚合酶链反应一限制性片段长度多态性方法分析A2M基因11000V多态性和载脂蛋白E基因(apolipoprotelnE，apoE)多态性。结果(1)在两地合并样本中，AD患者与对照组中等位基因A2M-1000V的频率分别为7．7％与8．7％，广州与成都地区AD患者与对照组中A2M基因I1000V多态的分布差异无统计学意义。(2)散发AD无论按是否伴有apoE—ε4或按发病年龄分成不同亚组后，A2M基因I1000V多态的分布在病例组与对照组之间差异无统计学意义。结论广州与成都汉族人群中A2M基因I1000V多态与散发AD不具有关联。     

Effect of the APOE‐491A/T promoter polymorphism on apolipoprotein E levels and risk of Alzheimer disease: The Rotterdam Study

The apolipoprotein E (APOE) gene is involved in lipid transport. A common polymorphism in this gene with the APOE*2, APOE*3, and APOE*4 alleles influences plasma levels of apolipoprotein E and cholesterol. Besides its role in lipid transport, the APOE*4 allele is a genetic risk factor for Alzheimer disease (AD). Recently, a polymorphism in the APOE promoter region was found to be involved in plasma apolipoprotein E levels and was found associated with AD. We studied the effect of this ?491A/T promoter polymorphism on plasma apolipoprotein E levels and risk for AD in a population‐based case‐control study. We found that there was a modest but statistically significant effect of the ?491A/T polymorphism on plasma apolipoprotein E levels independent of the APOE genotype. The lowest plasma levels were measured for the AA genotype, highest levels for the TT genotype, and intermediate levels for the heterozygotes. There was a small effect of the ?491 AA genotype on AD risk that disappeared after adjusting for APOE genotypes. Our data suggest that the ?491A/T polymorphism has an APOE genotype‐independent effect on plasma apolipoprotein E levels but no APOE‐independent effect on AD risk. © 2002 Wiley‐Liss, Inc.     

The apolipoprotein E gene in Binswanger's disease and vascular dementia

We investigated the polymorphism of the apolipoprotein E (ApoE) gene using a PCR-RFLP method in patients with Binswanger's disease (BD), non-BD vascular dementia, or Alzheimer's disease (AD). The frequency of the e4 allele of the ApoE (ApoE4) in BD patients and non-BD vascular dementia patients did not differ from that observed in the non-demented elderly controls, but it was significantly lower than the frequency in AD patients. These results and other recent observations suggest that one or more factors other than the ApoE gene contribute to the pathogenesis of dementia in BD and non-BD vascular dementia.     

载脂蛋白E基因多态性与散发性老年性痴呆病的关系

目的:探讨载脂蛋白E(apoE)外显子4和增强子元件基因多态性与散发性Alzheimer病(AD)的关系。方法:应用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)技术分别检测apoE外显子4和内含子1内增强子元件(IE1)基因型。结果:(1)ApoE外显子4基因多态性:AD组ε3/4基因型频率(0.381)和ε4等位基因频率(0.226)显著高于对照组(P＜0.05)。(2)ApoEIE1基因多态性AD组G/G基因型频率(0.595)显著高于对照组(P＜0.05)。(3)有apoEε4个体患AD风险为无ε4个体的3倍,比值比为2.932,95%可信区间1.379~6.226;G/G基因型个体患AD风险为G/C、C/C个体的2倍,比值比为2.223,95%可信区间1.075~4.599;经统计分析发现apoEε4与IE1G/G呈非常显著性正相关(P＜0.01);排除apoEε4后发现IE1G/G与AD发病风险无关。结论:ApoEε4等位基因是个体发生AD的危险因素,IE1G/G增加AD发病风险是因其与ε4相关所致。     

The role of the apolipoprotein E polymorphism in the prediction of coronary artery disease age of onset

We investigated the role of the apolipoprotein (Apo) E polymorphism in the prediction of CAD age of onset in a sample of unrelated living male (n = 65) and female (n = 54) Caucasian subjects diagnosed with CAD. Cumulative distributions of age at the first diagnosis of CAD were estimated for each Apo E genotype and tested for homogeneity using the log-rank test. The Apo e33 genotype was used as a reference group for all hypothesis tests. Analyses were performed separately in males and females. We found evidence suggesting that the presence of the Apo s32 genotype in males is associated with a significantly earlier CAD age of onset. These results suggest that the Apo E polymorphism may be a gender-specific predictor of CAD age of onset.     

白细胞介素1B基因启动子区-511位点C/T基因多态性与冠心病严重程度的相关性

目的探讨白细胞介素1B(interleukin1B,IL1B)基因启动子区-511位点C/T基因多态性与冠心病(coronary heart disease,CHD)严重程度的相关性。方法采用聚合酶链反应-限制性片段长度多态性分析的方法,检测127例CHD患者和152名对照组的IL1B-511位点C/T基因型;采用酶法测定血脂各项水平。结果IL1B-511位点C/T基因多态性在急性冠脉综合征(acute coronary syndrome,ACS)组和对照组间的分布差异存在统计学意义(χ2=5.72,P<0.01),CT及TT基因型患者患ACS的相对风险度约是CC基因型的2.56倍(比值比=2.56,95%可信区间=1.17~5.59);CHD组中,携带T等位基因的患者血清总胆固醇(6.09±0.97)mmol/L及低密度脂蛋白-胆固醇(3.97±0.92)mmol/L水平显著高于其他患者(5.12±0.56)mmol/L及(2.87±0.71)mmol/L(P<0.05)。结论IL1B-511位点C/T基因多态性与CHD的严重程度存在相关,其机理可能是该位点DNA变异影响了IL1B的分泌加重了炎症的反应及血脂紊乱。     

载脂蛋白E基因多态性与早发冠心病的关系及其对血脂的影响

目的 研究载脂蛋白E（apolipoprotein E,apoE)基因多态性与早发冠心病（coronary heart disease,CHD)的相关关系及其对血脂水平的影响。方法 应用聚合酶链反应－限制性片段长度多态性（polymerase chain reaction-restricted fragment hength polymorphism,PCR-RFLP)基因分析方法,测定52例早发CHD、161例迟发CHD患者和180名对照者的apoE基因型;血脂水平按常规方法测定。结果 发现的5种apoE基因型,分别为E3／3、E4／4、E3／2、E4／3及E4／2。早发CHD组和迟发CHD组apoE4/3基因型和ε4等位基因频率均高于对照组（P＜0．01）;进一步对两组CHD患者的apoE多态性进行分析,发现早发组ε4等位基因频率较迟发组为高（P＜0．05）。apoE各等位基因型之间,TC和LDL－C水平之间存在统计学差异（P＜0．05）。结论 apoE基因多态性与早发CHD的发生发展有关并影响血脂的水平。     

载脂蛋白A5基因-1131T>C多态性与冠心病易感性的关联研究

目的探讨载脂蛋白A5(apoA5)-1131T>C单核苷酸多态性与冠心病(CAD)发病风险之间的关系。方法经冠状动脉造影确诊的江苏地区冠心病患者235例,同一地区正常对照262名,采用PCRRFLP分析对apoA5基因的-1131T>C多态进行检测,比较不同基因型与个体血脂水平和冠心病患病风险的关系。结果-1131T>C单核苷酸多态位点等位基因T、C频率在CAD组和正常对照组中分别为59.57%、40.43%和65.65%、34.35%。CAD组中C等位基因的频率高于对照组(P<0.05)。与-1131TT基因型者比较,CC基因型者的冠心病患病风险显著增加(OR=1.872,95%CI=1.039-3.376,P=0.037),用Logistic回归模型对个体的年龄、性别、体重指数和抽烟、高血压等因素后,其患病风险仍明显增加(OR=2.285,95%CI=1.222-4.274)。对照组中不同基因型个体血浆甘油三酯水平差异有统计学意义(P=0.007),携带C等位基因的个体TG水平显著高于TT基因型个体。结论apoA5基因-1131T>C多态性C等位基因是中国人群中冠心病发病的危险因素之一,且与血浆TG水平的变化密切相关。