脂蛋白脂酶基因多态性与脑梗死

脂蛋白脂酶(LPL)基因多态性与动脉粥样硬化性疾病或卒中的关系成为近年来的研究热点。LPL基因突变较为多见,其中限制性片段长度多态性(RFLP),如HindⅢ、PvuⅡ基因多态性;单链构象多态性(SSCP),如D9N、N291S、Ser447X多态性等的研究较多。基因型在不同种族和不同地区的分布存在差异。这些基因多态性与血脂异常、动脉粥样硬化和脑血管疾病之间存在一定的关系。     

脂蛋白脂酶基因多态性与中青年原发性高血压的相关性研究

目的:探讨中国中青年汉族人群中脂蛋白脂酶(LPL)单核苷酸基因多态性(SNP)与原发性高血压(EH)易感性的关系。方法:根据一定的纳入和排除标准筛选高血压患者及健康体检人群,收集临床资料,采集血液标本,采用TaqMan-MGB法检测LPL基因rs253和rs328位点多态性,分析基因多态性与中青年原发性高血压发病率的相关性。结果:病例组入选499例,对照组入选336例,两组之间性别、年龄、吸烟比例、血肌酐水平差异无统计学意义,饮酒、家族史、血压、血糖等指标有统计学差异。不同基因型在病例组与对照组的分布:rs253位点CC、CT、TT基因型分布有统计学差异(P=0.044),rs328位点等位基因G、C分布频率有统计学差异(P0.001)。将总体按BMI是否25 kg/m~2和是否有血脂异常分层并进行多种基因模型分析,结果显示在中青年肥胖人群(BMI≥25 kg/m~2)中,rs253位点隐性模型CC vs CT+TT中基因型频率分布有统计学差异(P=0.002);在血脂异常的人群中,rs253位点隐性模型CC vs CT+TT基因型频率分布有统计学差异(P=0.020)。Logistic回归分析校正性别、年龄、吸烟、饮酒、家族史、BMI、血脂等多个混杂因素后,结果依然显示,在中青年肥胖人群中,rs253位点隐性模型与高血压发病风险显著相关(P=0.017,OR=0.598,95%CI:0.393～0.912);在有血脂异常的人群中,该模型亦与高血压发病风险相关(P=0.037,OR=0.652,95%CI:0.436～0.975)。结论:在国内中青年汉族肥胖人群以及有血脂异常的人群中,LPL基因rs253位点多态性可能与EH发生相关,该位点CC基因型较CT和TT发病风险明显降低;rs328位点则未见与EH明显相关性。     

单纯性肥胖患者脂蛋白脂酶基因多态性

目的 探讨脂蛋白脂酶(LPL)基因HindⅢ多态性与单纯性肥胖患者体脂分布、脂质代谢的关系。方法 采用PCR-RFLP对98例单纯性肥胖患者和51名正常对照组LPL基因第8内含子HindⅢ酶切位点进行多态性分析,并测定体脂分布指标与血脂水平。结果LPL HindⅢ位点在两组中均以H+等位基因为主。两组等位基因频率及基因型差异均无显著性,但肥胖组H+H+基因型者血浆甘油三酯水平明显增高、高密度脂蛋白胆固醇明显降低(P均<0.05),腰围、腹腔内脏脂肪面积也显著高于非H+H+基因型者(P<0.05)。结论LPL HindⅢ基因多态性对肥胖患者的血脂水平及脂肪分布有影响。具有HindⅢ酶切位点的H+等位基因可能是单纯性肥胖患者出现腹型肥胖和脂代谢紊乱的遗传易感因素之一。     

脂蛋白脂酶与冠心病

脂蛋白脂酶（LPL）是血浆脂蛋白代谢过程中的关键酶，主要催化富含甘油三酯的脂蛋白（乳糜微粒、极低密度脂蛋白）核心中甘油三酯的水解。任何原因造成的LPL活性改变必将引起机体脂代谢紊乱，出现以高甘油三酯血症为基础的多种脂蛋白含量及亚组分的改变，主要表现为高密度脂蛋白胆固醇水平下降及小密低密度脂蛋白生成增加，进而使冠心病发生的危险性升高。近年来关于LPL基因变异引起其活性改变的研究已取得初步进展，LPL基因已被列为与冠心病发病有关的重要候选基因之一，但还有待于进一步深入研究以得到更全面的认识。     

高脂血症性急性胰腺炎脂蛋白脂酶基因多态性研究

目的 探讨三酰甘油分解代谢酶脂蛋白脂酶(LPL)的表达和基因多态性与高脂血症性急性胰腺炎(HLP)的相关性.方法 2005年5月至2006年12月HLP住院患者20例,急性胰腺炎患者50例,另选取血脂正常患其他疾病者50例为对照.测定血清三酰甘油(TG)、胆固醇(Ch)、游离脂肪酸(FFA)、脂蛋白数值、血清LPL/肝脂酶(HL)活性;RT-PCR检测LPL mRNA表达;聚合酶链-限制性酶切片段多态性分析(PCR-RFLP)法分析LPL基因内含子8 Hind Ⅲ基因多态性变化.结果 HLP组血清TG、胆固醇(Ch)和FFA测定值均显著高于AP组和对照组,差异均有统计学意义(P值均<0.05);HLP组ApoE值显著高于AP组和对照组(P<0.05);HLP组高密度脂蛋白(HDL)显著低于对照组(P<0.05).HLP组LPL值为(5.98±2.28)U/L,均显著高于AP组和对照组[(1.97±0.76)U/L和(1.04±0.53)U/L,P值分别=0.046和0.031];HLP组HL值为(8.15±2.86)U/L,均显著高于AP组和对照组(1.64±0.59)U/L和(0.86±0.39)U/L,P值分别=0.002和0.001].HLP组LPL mRNA表达高于AP组,差异有统计学意义(P=0.0325).LPL基因内含子8 Hind Ⅲ分析,H2等位基因频率HLP组显著高于对照组(0.90比0.72,P<0.05);H1等位基因频率在HLP和AP组均显著低于对照组(0.10比0.28和0.14比0.28,P<0.05).HLP组H2H2基因型患者TG和Apo E值均显著高于H2H1/H1H1基因型(P值分别=0.043和0.046);AP组H2H2基因型患者TG值显著高于H2H1/H1H1基因型(P=0.032).结论 HLP患者LPL Hind Ⅲ H2等位基因频率显著高于正常人群,主要与高三酰甘油血症(HTG)相关,而与胰腺炎无关;且H2H2基因型的HLP患者血清TG、ApoE值高于其他基因型者.HTG可引起LPL基因和蛋白表达活性增高,加速TG大量分解代谢和FFA等分解产物蓄积,是诱发和加重HLP的中心环节和重要病理生理机制.     

脑出血患者脂蛋白脂酶基因PvuⅡ酶切多态性的观察

目的探讨脂蛋白脂酶基因PvuⅡ多态性与脑出血的关系。方法采用聚合酶链反应和限制性片段长度多态性方法(PCR-RFLP),对55例脑出血患者和正常对照组58例脂蛋白脂酶基因PvuⅡ多态性分析。结果(1)正常对照组PvuⅡ等位基因频率分别为P 67.24%,P-32.76%;脑出血组PvuⅡ等位基因频率为P 63.63%,P-36.37%;脂蛋白脂酶基因PvuⅡ等位基因频率在脑出血组与正常对照组之间差异无显著性。(2)与正常对照组相比,脑出血患者组血清TG、LDL-c水平较对照组升高(P<0.05);脑出血患者组血清HDL-c、ApoAI水平较对照组降低(P<0.05)。结论脂蛋白脂酶PvuⅡ酶切多态性与脑出血无明显关联。     

脂蛋白脂酶基因多态性与脑梗死

脂蛋白脂酶(LPL)基因多态性与动脉粥样硬化性疾病或卒中的关系成为近年来的研究热点。LPL基因突变较为多见，其中限制性片段长度多态性(RFLP)，如HindⅡ、PvuⅡ基因多态性；单链构象多态性(SSCP)，如DgN、N29lS、Ser447X多态性等的研究较多。基因型在不同种族和不同地区的分布存在差异。这些基因多态性与血脂异常、动脉粥样硬化和脑血管疾病之间存在一定的关系。     

肥胖、胰岛素抵抗与脂蛋白脂酶基因多态性的相关性

目的 评价中国汉族人群脂蛋白脂酶(LPL)基因HindⅢ酶切位点突变与肥胖、胰岛素抵抗的关系.方法 研究对象来自河北居住的健康查体人群,体质指数(BMI)≥25.0 kg/m2归为肥胖组,共233例,BMI＜ 25 kg/m2归为正常对照组,共108例.从正常对照人群中选择采用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)方法,分析了343例样本LPL基因第8内含子HindⅢ多态性,各组间率的比较采用卡方检验.结果 调整年龄、性别后,肥胖组和对照组的基因型和基因频率差异无统计学意义(P＞0.05),而肥胖组中并发高TG血症组和对照组的基因型和基因频率差异有统计学意义(P＜0.05)；肥胖组H+H+基因型者与H-H-基因型者比较,血清TG和胰岛素抵抗指数差异有统计学意义.结论 LPL基因HindⅢ酶切位点突变与肥胖无相关性,与肥胖者胰岛素抵抗可能相关.     

2型糖尿病患者脂蛋白脂酶基因多态性与冠心病关系的研究

高甘油三酯 (ＴＧ)血症是 2型糖尿病 (ＤＭ )常见并发症 ,而且是其并发冠心病 (ＣＨＤ)的独立危险因子 ,其机制尚未阐明。本研究旨在探索 2型ＤＭ患者脂蛋白脂酶 (ＬＰＬ)基因多态性与血脂及ＣＨＤ的关系。一、对象和方法1.对象 :2型ＤＭ患者 2 16例 (2型ＤＭ组 ) ,年龄 (5 8±12 )岁 (4 0～ 89岁 ) ,男 114例 ,女 10 2例 ;77例并发ＣＨＤ(伴ＣＨＤ组 ) ,年龄 (5 9± 11)岁 ,男 40例 ,女 37例 ;139例不伴ＣＨＤ(不伴ＣＨＤ组 ) ,年龄 (5 7± 14)岁 ;正常人 6 3例作为对照。2 .方法 :(1)空腹新鲜血标本测定空腹血糖 (ＦＢＧ)、总胆固醇 (ＴＣ…     

脂蛋白脂酶基因S447X及HindⅢ位点多态性与冠心病的关系

目的:探讨脂蛋白脂酶(LPL)基因S447X及HindⅢ多态性与冠心病的关系.方法:对249例经冠状动脉造影证实为冠心病的患者及167例经冠状动脉造影证实无冠状动脉病变的对照者进行研究,采用酶法测定血脂各项水平,采用多聚酶链反应-限制性内切酶片段长度多态性(PCR-RFLP)分析LPL基因中S447X及HindⅢ多态性.结果:冠心病组与对照组比较,LPL S447X及HindⅢ基因型及等位基因分布频率均无显著性差异,P＞0-05.而按血浆TG水平分组可见低TG组(TG＜1.7mmol/L)的SX/XX基因型频率及X等位基因频率均明显高于高TG组(TG≥1.7mmol/L),P＜0.05.且低TG组中SX/XX基因型与SS基因型比较各项血脂水平(sLDL除外)均有显著性差异,P＜0.05.结论:S、X、H 、H-等位基因频率在冠心病组及对照组之间无明显差异.LPLS447X及HindⅢ多态性并不是冠心病发病的独立危险因素,但S447X变异由于对血脂代谢产生了有益的影响(TC、TG、LDL-C、sLDL、VLDL-C及ApoB水平均降低,HDL-C升高)因而可被认为是冠心病的保护因素之一.     

Association of lipoprotein lipase gene polymorphisms with coronary artery disease

OBJECTIVES: The purpose of this study was to test whether the HindIII (+) and PvuII (-) or (+) restriction enzyme-defined alleles are associated with angiographic coronary artery disease (CAD). BACKGROUND: Lipoprotein lipase (LPL) plays a central role in lipid metabolism, hydrolyzing triglyceride in chylomicrons and very low density lipoproteins. Polymorphic variants of the LPL gene are common and might affect risk of CAD. METHODS: Blood was drawn from 725 patients undergoing coronary angiography. Leukocyte deoxyribonucleic acid segments containing the genomic sites were amplified by the polymerase chain reaction and digested, and polymorphisms were identified after electrophoresis in 1.5% agarose gel. RESULTS: In no-CAD control subjects (n = 168), HindIII (-) and (+) allelic frequencies were 28.6% and 71.4%, and (-) and (+) alleles were carried by 44.0% and 86.9% of subjects, respectively. Control PvuII (-) and (+) allelic frequencies were 41.7% and 58.3%, and (-) and (+) alleles were carried by 64.3% and 81.0%, respectively. In CAD patients (>60% stenosis; n = 483), HindIII (+) allelic carriage was increased (93.8% of patients, odds ratio [OR] = 2.28, confidence interval [CI] 1.27 to 4.00). Also, PvuII (-) allelic carriage tended to be more frequent in CAD patients (OR = 1.33, CI 0.92 to 1.93). Adjusted for six CAD risk factors and the other polymorphism, HindIII (+) carriage was associated with an OR = 2.86, CI 1.50 to 5.42, p = 0.0014, and PvulI (-) carriage, OR = 1.42, CI 0.95 to 2.12, p = 0.09. The two polymorphisms were in strong linkage disequilibrium, and a haplotype association was suggested. CONCLUSIONS: The common LPL polymorphic allele, HindIII (+), is moderately associated with CAD, and the PvuII (-) allele is modestly associated (trend). Genetic variants of LPL deserve further evaluation as risk factors for CAD.     

Association of ABCB1 gene polymorphisms with aspirin resistance in patients with ischemic stroke

正Objective To investigate the relationship of single nucleotide polymorphisms of Multi-drug resistance(ABCB1/MDR1)gene with Aspirin resistance(AR)in patients with ischemic stroke.Methods Three hundred ischemic stroke patients from Department of Neurology,Affiliated Hospital of Qingdao University were collected     

脂蛋白脂酶Ser447Ter基因变异和吸烟对缺血性卒中的影响

目的探讨脂蛋白脂酶（LPL）基因Ser447Ter变异和吸烟的交互作用对缺血性脑卒中发生风险的影响。方法采用病例-对照设计,对96例缺血性脑卒中患者及117例非心脑血管病者进行研究,采用聚合酶链式反应-限制片段长度多态性（PCR-RFLP）观察LPL基因Ser447Ter变异和吸烟在脑卒中患者中的分布以及二者交互作用对卒中危险性的影响。结果缺血性脑卒中患者LPLSer447Ter携带比例为10.4%,显著低于对照人群（21.4%,P〈0.05）;Ser447Ter携带者发生脑卒中的危险OR值为0.428（95%CI：0.194～0.994;P=0.035）;吸烟者较非吸烟者罹患卒中风险OR=3.08（95%CI：2.105～6.876;P〈0.01）;CC型中吸烟者发生卒中风险OR=4.14（95%CI：2.157～7.915;P〈0.01）;CG型吸烟者与非吸烟者比较OR=2.11（95%CI：0.442～10.08;P〉0.05）;吸烟者CG型较CC型发生卒中风险为OR=0.29（95%CI：0.074～9.140;P=0.082）,接近统计学意义;与CC/不吸烟比较,CG/吸烟者卒中风险OR=1.20（95%CI：0.320～4.505;P〉0.05）。结论 LPLSer447Ter是脑卒中低危性的基因标记,LPL基因Ser447Ter变异减弱了吸烟者对缺血性脑卒中的易感性。     

Impact of lipoprotein lipase gene polymorphisms on ulcerative colitis

INTRODUCTION Inflammatory bowel disease (IBD), characterized by chronic recurrent inflammation of the intestinal tract, includes two common forms: Crohn’s disease (CD) and ulcerative colitis (UC). For both forms, the etiology is unclear, but likely to be…     

Association of lipoprotein lipase gene polymorphisms with obesity and type 2 diabetes in an Asian Indian population

AIMS: Lipoprotein lipase (LPL), a pivotal enzyme in lipoprotein metabolism, catalyzes the hydrolysis of triglycerides of very low-density lipoproteins and chylomicrons. Assuming that the variants in the promoter of the LPL gene may be associated with changes in lipid metabolism leading to obesity and type 2 diabetes, we examined the role of promoter variants (-T93G and -G53C) in the LPL gene in an urban South Indian population. METHODS: The study subjects (619 type 2 diabetic and 731 normal glucose-tolerant (NGT) subjects) were chosen from the Chennai Urban Rural Epidemiology Study, an ongoing population-based study in southern India. The polymorphisms were genotyped using polymerase chain reaction-restriction-fragment length polymorphism (PCR-RFLP). Linkage disequilibrium (LD) was estimated from the estimates of haplotypic frequencies. RESULTS: The two polymorphisms studied were not in LD. The -T93G was not associated with type 2 diabetes but was associated with obesity. 11.5% of the obese subjects (62/541) had the XG(TG+GG) genotype compared with 6.4% of the nonobese subjects (52/809; P=0.001). The odds ratio for obesity for the XG genotype was 1.766 (95% CI: 1.19-2.63, P=0.005). Subjects with XG genotype also had higher body mass index and waist circumference compared with those with TT genotype. With respect to G53C, subjects with the XC(GC+CC) genotype had 0.527 and 0.531 times lower risk for developing type 2 diabetes and obesity, respectively. CONCLUSIONS: Among Asian Indians, the -T93G SNP of the LPL gene is associated with obesity but not type 2 diabetes, whereas the -G53C SNP appears to be protective against both obesity and type 2 diabetes.     

Association of the lipoprotein lipase and Apolipoprotein C-II gene polymorphisms with risk of dyslipidemia in smokers and non-smokers male

ObjectiveDyslipidaemia is considered a metabolic abnormality andan important risk factor that leads to atherogenic cardiovascular diseases. Cigarette smoking is associated with dyslipidaemia. This study aimed to demonstrate whether lipoprotein lipase enzyme (LPL) and Apolipoprotein CII (APOCII) gene polymorphisms can be considered as independent genetic risk factors for dyslipidaemia among smokers with various smoking durations.MethodsA total of 185 males (90 smokers and 95 non-smokers)were included in this study, Lipid profiles were measured and DNA was isolated. The LPL-Hind III and APO CII-Ava II polymorphisms were determined using the polymerase reaction-restriction fragment length polymorphisms (RFLP) technique.ResultsFor the LPL-Hind IIIpolymorphism H+H+ genotype group, the triglycerides TG and very-low-density lipoprotein cholesterol VLDL-C concentrations were significantly higher and the high-density lipoprotein cholesterol HDL-C concentration was significantly lower than those of the H–H- genotype. ForAPO CII-Ava II polymorphisms, compared with those of the A2A2 genotype group, the total cholesterol TC, TG, low-density lipoprotein cholesterol LDL-C and VLDL-C concentrations were significantly increased in the A1A2 genotype group, while the HDL-C concentration was significantly decreased.ConclusionsThe study revealed that the H+H+ or H + H-genotype of the LPL-Hind III polymorphism and the A1A1or A1A2 genotype of the APOCII-Ava II polymorphism were at higher risk of developing dyslipidaemia compared to the H–H- genotype of the LPL-Hind III polymorphism and A2A2 genotype of the APOCII-Ava II polymorphism.     

血小板膜糖蛋白基因多态性与缺血性卒中

血小板膜糖蛋白在血小板黏附、活化、聚集和血栓形成过程中发挥着关键作用.许多研究显示,血小板膜糖蛋白基因多态性与缺血性卒中有关.文章对血小板膜糖蛋白基因多态性与缺血性卒中的关系进行了综述.     

A study of lipoprotein lipase gene intron 8 polymorphisms in Chinese Han race essential hypertension patients

OBJECTIVE: To investigate the association of lipoprotein lipase gene intron 8 polymorphisms and Essential Hypertension in Han race Chinese. METHODS AND RESULTS: 116 patients with Essential Hypertension were enrolled and another 116 normal people were served as controls. All cases were examined for the genotypes of intron 8 in lipoprotein lipase gene by the methods of polymerase chain reaction restriction fragment length polymorphism, and the serum lipoprotein levels were also observed. Results showed that body mass index blood pressure and the serum triglyceride level were obviously increased in the Essential Hypertension group. The genotype and allele frequency of intron 8 in lipoprotein lipase in the Essential Hypertension group showed obvious differences compared with the control group. Serum triglyceride levels were higher in the patients with H+H+ genotype than in those in non H+H+ genotype of intron 8 in lipoprotein lipase by HindIII digestion. The systolic blood pressure showed a decreasing tendency among the H+H+ genotype, the H+H- genotype and the H-H- genotype individuals. CONCLUSION: The results suggest that lipoprotein lipase may be an important genetic factor associated with the Chinese Han race Essential Hypertension patients. The polymorphisms of intron 8 in lipoprotein lipase influence the blood-lipid metabolism, induce blood vessel rebuilding and play an important role in the invasion and development of Essential Hypertension.