肥胖者HDL亚类组成与载脂蛋白E基因多态性的关系

目的：探讨肥胖者血清载脂蛋白E基因多态性与HDL亚类组成的关系。 方法： 采用聚合酶链反应-限制性片段长度多态性和双向电泳-免疫印迹检测法，分析93例肥胖者和96例非肥胖者者的apoE基因型、HDL各亚类组成及相对含量。 结果： 肥胖组和对照组apoE基因型及等位基因频率分布均以E3/3和ε3最高。肥胖者等位基因ε2携带者血清apoE/CⅢ、HDL2a较等位基因ε3和ε4携带者升高，而apoB100、apoCIII、HDL3c则较ε3携带者下降，差异显著（P<0.05）。对照组中等位基因ε2携带者血清TC、apoE较等位基因ε3携带者升高，等位基因ε2携带者HDL3b较等位基因ε3携带者降低，差异显著（P<0.05）。 结论： apoE 基因多态性与HDL亚类的组成和分布相关,ε2等位基因有减缓肥胖者HDL颗粒变小的作用。     

Ⅳ型高脂血症患者高密度脂蛋白亚类组成与载脂蛋白E基因多态性关系的研究

目的探讨型高脂血症患者载脂蛋白E基因多态性与HDL亚类组成的关系。方法采用聚合酶链反应-限制性片段长度多态性和双向电泳-免疫印迹检测法,分析103例型高脂血症患者和146名血脂正常者的apoE基因型、HDL各亚类组成及相对含量。结果型高脂血症组和对照组apoE基因型及等位基因频率分布均以E3/3和ε3最高。型高脂血症患者中等位基因ε2携带者血清HDL-C、apoE、apoE/C、HDL2a较等位基因ε3、ε4携带者升高,而TG/HDL-C、apoC则下降,等位基因ε2携带者HDL3c较等位基因ε3携带者降低,其差异有统计学意义(P<0.05)。对照组中等位基因ε2携带者血清TG、apoE、apoE/C较等位基因ε3和ε4携带者升高,等位基因ε2携带者HDL3a较等位基因ε3携带者降低,其差异有统计学意义(P<0.05)。结论型高脂血症患者apoEε2等位基因与血清HDL亚类的成熟代谢有关。     

胆固醇7α-羟化酶基因-204A/C多态性与内源性高甘油三酯血症关联的研究

目的探讨成都地区内源性高甘油三酯血症（hypertriglyceridemia，HTG）患者胆固醇7α-羟化酶（cholesterol 7α-hydroxylase，CYP7A1）基因一204A／C多态性与血脂及载脂蛋白的关系。方法应用聚合酶链反应-限制性片段长度多态性技术检测212名正常对照者和132例内源性HTG患者CYP7A1-204A／C基因多态性。酶法测定血清甘油三酯（triglyceride，TG）、总胆固醇（total cholesterol，TC）及高密度脂蛋白胆固醇（high density lipoprotein cholesterol，HDL-C），用本校载脂蛋白研究室研制的RID试剂盒测定血清apoAI、A1I、B100、CH、C111及E。结果CYP7A1—204A／C多态位点等位基因A、C频率在HTG组和正常对照组分别为0．602、0．398和0．601、0．399。等位基因频率和基因型频率分布均符合Hardv—Weinberg平衡定律。CYP7A1—204A／C多态性基因型频率，等位基因A、c频率在HTG组和正常对照组间比较差异无统计学意义（P〉0．05）。HTG组CC、AC基因型患者血清TG和apoCⅢ水平较从基因型患者显著增高（P〈0．05）。血清HDL-C水平在正常对照组中CC、AC基因型者较AA基因型者显著降低（P〈0．05），正常对照组中男性CC、AC基因型者血清TG水平较从基因型者显著增高（P〈0．05）。结论CYP7A1基因-204A／C多态性与HTG无关联，但HTG患者CYP7A1基因-204A／C多态性与血清TG和apoCⅢ水平密切相关。CYP7A1基因-204A／C多态性在正常对照组中与血清HDL-C水平密切相关，在正常男性人群中与血清TG水平增高密切相关。     

中国人内源性高甘油三酯血症与脂蛋白脂酶基因PvuⅡ多态性关联的研究

目的：探讨中国人内源性高甘油三酯血症（hypertriglyceridemics,HTG)与脂蛋白脂酶基因PvuⅡ多态性是否关联。方法：采用聚合酶链反应和限制性片段长度多态性方法,对成都地区135例内源性高甘油三酯血症患者和193名血脂正常者脂蛋白脂酶基因内含子6PvuⅡ多态性及其对血脂及载脂蛋白（apo)水平的影响进行了研究。结果：HTG患者和正常人均以P＋等位基因为主,HTG组以P＋P＋基因型为主,而正常对照组P＋P－基因型为主。HTG组的P＋P＋基因型分布频率及P＋等位基因分布频率则显著高于正常对照组（0.460vs0.337,P＜0.05;0.689vs0.565,P＜0.01)。P＋P＋基因型者的血清甘油三酯（TG）、apoCⅡ、apoCⅢ、apoE水平及TG／HDL－C比值较P－P－基因型者显著增高（P＜0．05）。结论：脂蛋白酯酶基因P＋P＋基因型与中国人内源性高甘油三酯血症的遗传易感性有一定关联。     

正常中国人及内源性高甘油三酯血症患者酰基辅酶A:胆固醇酰基转移酶基因多态性的研究

目的 研究酰基辅酶A:胆固醇酰基转移酶1(acyl-coenzyme A:cholesterol acyltransferase 1,ACAT1)基因rs1044925多态性是否与正常汉族中国人及内源性高甘油三酯血症(hypertriglyceridemia,HTG)患者血脂及载脂蛋白水平存在关联.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372名汉族人(267名正常人和105例内源性高甘油三酯血症患者)ACAT1基因rs1044925多态位点进行分析.结果 中国人ACAT1基因rs1044925多态位点C等位基因频率为0.137,显著低于中部和南部欧洲人的0.354(P＜0.05);HTG组和对照组C等位基因频率分别为0.153和0.137,两者之间差异无统计学意义.对照组AA基因型携带者血清低密度脂蛋白胆固醇(low density lipoprotein-cholesterol,LDL-C)和非高密度脂蛋白胆固醇(non-high density lipoprotein cholesterol,nHDL-C)水平均较C等位基因携带者(Ac和CC基因型者)显著升高[(3.25±0.68)mmol/L vs(3.03±0.87)mmol/L,P＜0.05;(3.80±0.71)mmol/L vs(3.23±0.82)mmol/L,P＜0.05],HTG组AA基因型携带者血清高密度脂蛋白胆固醇(high density lipoprotein-cholesterol,HDL-c)水平较C等位基因携带者显著升高[(1.00±0.28)mmol/L vs(0.87±0.17)mmoL/L,P＜0.05].结论 ACAT1 基因rs1044925多态性不仅与正常中国成都地区汉族人血清LDL-C、nHDL-C含量有关,而且还与内源性高甘油三酯血症患者血清HDL-C水平相关联.     

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。     

正常中国人及内源性高甘油三酯血症患者内皮脂酶基因启动子-384A》C多态性的研究

目的 研究内皮脂酶基因启动子-384A>C位点多态性与正常汉族中国人及内源性高甘油三酯血症(hypertriglyceridemia,HTG)患者血脂及载脂蛋白水平是否存在关联,为探讨HTG发病的分子遗传基础提供依据.方法 采用聚合酶链反应.限制性片段长度多态性分析法对214名正常人和103例HTG患者内皮脂酶基因-384A>C位点多态性进行分析,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 中国人内皮脂酶基因-384A>C多态位点C等位基因频率为0.178,与日本人的0.119和日裔美国人的0.115比较,差异有统计学意义(P<0.01,P<0.01).未见正常人和HTG患者之间C等位基因频率存在差异(P>0.05).正常中国人C等位基因携带者(AC及CC型者)血清总胆固醇、低密度脂蛋白胆固醇及非高密度脂蛋白胆固醇水平均较AA基因型者显著升高(5.23±0.74mmol/L vs 4.93±0.74mmol/L,P=0.025;3.27±0.74 mmol/L vs 2.98±0.80 mmol/L,P=0.038;3.81±0.73 mmol/L vs 3.49±0.85 mmol/L,P=0.031);进一步按性别划分为男女亚组后,这种差异仅在女性亚组存在.未见该多态性与高密度脂蛋白胆固醇及其它血脂和载脂蛋白水平存在关联.对HTG患者的研究未发现-384A>C多态性与血脂及载脂蛋白水平有关.结论 内皮脂酶基因-384A>C多态性与成都地区正常汉族中国人血清总胆固醇、低密度脂蛋白-胆固醇及非高密度脂蛋白.胆固醇水平有关联,但未见其与HTG患者血脂及载脂蛋白水平有关.     

中国人内源性高甘油三酯血症患者胆固醇酯转运蛋白基因Taq IB和-629C/A多态性

目的研究胆固醇酯转运蛋白（cholesterol ester transfer protein，CETP）基因多态性是否与中国人内源性高甘油三酯血症（hypertriglyceridemia，HTG）有关联，为探讨本病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，对成都地区汉族214名正常人及135例HTG患者CETP基因Taq IB和-629C／A多态性位点进行分析。结果中国人CETP基因Taq IB多态位点B2等位基因频率为0．418，-629C／A多态位点A等位基因频率为0．479。HTG组和对照组Taq IB位点和-629C／A之间等位基因的频率差异无统计学意义（0．382 vs 0．418，P〉0．05；0．489 vs 0．479，P〉0．05）。两位点连锁关系分析提示其存在强的连锁不平衡（D＇=0．881）。对照组Taq IB位点B2B2基因型携带者其血清高密度脂蛋白水平较B1B1携带者高（P〈0．05），而低密度脂蛋白较B1B2者显著降低，按性别划分为亚组后，差异仅在对照组男性存在（P〈0．05）；对照组-629C／A位点CC基因型携带者其血清低密度脂蛋白水平较AC基因型者显著降低（P〈0．01），而载脂蛋白AⅡ则显著升高（P〈0．05）。两位点联合基因型的分析显示，对照组B2B2CC基因型携带者血清高密度脂蛋白较B1B1CC型者显著升高（P〈0．05），B2B2CC型者与B1B1CC型者比较，甘油三酯水平显著降低（P〈0．05）。结论中国成都地区汉族人CETP基因Taq IB多态性与血清高密度脂蛋白、低密度脂蛋白含量有一定关联，-629C／A多态性与血清低密度脂蛋白和载脂蛋白AⅡ有一定关联，但未见这些位点与内源性高甘油三酯血症有关。     

载脂蛋白E基因多态性与血脂代谢及冠心病的关系

目的：研究载脂蛋白E基因多态性对血脂代谢的影响及其与冠心病的关系。方法：运用PCR－PFLP方法检测168例江苏地区无血缘健康汉族人群。分析健康人群各基因型及等位基因对血脂、载脂蛋白及脂蛋白（a）的影响,同时测定63全冠心病患者载脂蛋白E基因型,并与性别相匹配的90例正常对照组比较各基因型及等位基因频率分布。结果：载脂蛋白E各基因型血清总胆固醇（TC）、低密度脂蛋白胆固醇（LDL－C）及载脂蛋白B（ApoB）水平由高到低依次为ε3／4＞ε3／3＞ε2／3;各等位基因TC、LDL－C及ApoB水平由高到低依次为ε4＞ε3＞ε2。ε2等位基因具有明显的降低TC、LDL－C和ApoB的作用,而ε4等位基因明显的升高TC、LDL－C和ApoB的作用。冠心病组ε4等位基因频率（12.70%）明显高于对照组（5.55%）。结论：载脂蛋白E基因多态性影响血脂及载旨蛋白水平。ε2 基因具有明显的降低TC、LDL－C和ApoB的作用,而ε4等位基因的作用正相反。ε4等位基因可能是冠心病的遗传易患因子。     

高脂血症APOE基因多态性与高密度脂蛋白亚类组成的关系

目的探讨高脂血症患者载脂蛋白E(apolipoproteinE,APOE)基因多态性与高密度脂蛋白(highdensitylipoprotein,HDL)亚类组成变化的关系。方法应用聚合酶链反应-限制性片段长度多态性和双向电泳-免疫印迹检测法,分析112例高脂血症患者和73名正常对照者APOE基因型、HDL各亚类组成及相对含量。结果高脂血症组和对照组APOE基因型及等位基因频率分布均以E3/3和ε3最高。高脂血症患者中等位基因ε2携带者血清APOE/C较等位基因ε3升高,而HDL3b则下降,其差异有显著性(P<0.05)。对照组中等位基因ε2携带者血清甘油三酯、apoE、apoE/C较等位基因ε3和ε4携带者升高,等位基因ε2携带者HDL3a较等位基因ε3携带者低,其差异有显著性(P<0.05)。结论APOE基因多态性可能与血清HDL部分亚类的含量变化相关。     

中国人内源性高甘油三酯血症患者ATP结合盒转运子A1基因R219K多态性研究

目的研究ATP结合盒转运子A1(ATP binding cassette A1,ABCA1)基因R219K多态性是否与中国人内源性高甘油三酯血症(hypertriglyceridemia,HTG)有关联,为探讨本病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309名汉族人(200名正常人和109例内源性高甘油三酯血症患者)ABCA1基因R219K多态性位点进行分析。结果中国人ABCA1基因R219K多态位点K等位基因频率在对照组和HTG组分别为0.472与0.436;HTG组和对照组R219K位点之间基因型和等位基因的频率差异无统计学意义。对照组和HTG组KK基因型携带者血清高密度脂蛋白胆固醇(high density lipoprotein-cholesterol,HDL-C)水平均较相应组RR基因型携带者显著升高[(1.48±0.45)mmol/Lvs(1.27±0.29)mmol/L,P<0.05;(1.07±0.30)mmol/Lvs(0.87±0.19)mmol/L,P<0.05];对照组RK型携带者血清甘油三酯水平较RR型携带者显著降低[(1.22±0.37)mmol/Lvs(1.41±0.84)mmol/L,P<0.05],HTG组血清甘油三酯在RR、RK、KK型之间有逐渐降低的趋势[(3.82±2.02)mmol/Lvs(3.42±1.67)mmol/Lvs(3.33±1.43)mmol/L,P>0.05];HTG组K等位基因携带者(RK或KK型者)总胆固醇(totalcholesterol,TC)/HDL-C比值均较RR型携带者显著降低(KKvsRKvsRR4.82±1.28vs5.42±1.62vs6.33±1.70,P<0.05)。结论ABCA1基因R219K多态性不仅与中国成都地区正常汉族人血清HDL-C、甘油三酯含量有关,而且还与内源性高甘油三酯血症患者血清HDL-C水平、TC/HDL-C比值相关联。     

Analysis of beta2-adrenergic receptor gene (beta2AR) Arg16Gly polymorphism in patients with endogenous hypertriglyceridemia in Chinese population]

OBJECTIVE: To investigate the Arg16Gly polymorphism of beta2-adrenergic receptor (beta2AR) gene and its association with endogenous hypertriglyceridemia (HTG) in Chinese population. METHODS: Three hundred and forty one subjects including 100 HTG patients and 241 healthy controls from a population of Chinese Han nationality in Chengdu area were studied using polymerase chain reaction-restriction fragment length polymorphisms (PCR-RFLPs). RESULTS: The frequencies of Gly allele at the Arg16Gly locus in combined group was 0.446, and were 0.427 and 0.490 in normal and HTG group, respectively. No significant difference was found in both allele and genotype frequencies between normal control and HTG group. The frequency of Gly allele at the Arg16Gly locus in beta2-adrenergic receptor gene in the population (0.446) was similar to that of Japanese (0.505), higher than that of American white(0.248), and lower than that of Polish population (0.633). In normal controls, subjects with genotype Arg/Arg had a higher concentration of serum TG and apoB100, and lower apoAII levels, when compared with those with genotypes Arg/Gly or Gly/Gly, respectively (vs. Arg/Gly for TG, vs. Gly/Gly for apoB100 and apoAII, respectively, P<0.05). In HTG group, subjects with genotype Arg/Arg had higher serum TC and low-density lipoprotein cholesterol levels when compared with those with Gly/Gly genotype (5.36+/-0.74 mmol/L vs. 4.77+/-1.07 mmol/L,P<0.05;3.03+/-0.70 mmol/L vs. 2.38+/-1.10 mmol/L,P<0.05). CONCLUSION: These results suggest that the Arg16Gly polymorphism in beta2-adrenergic receptor gene are not only associated with serum TG,apoB100 and apoAII levels in the healthy Chinese subjects in Chengdu area, but also with serum TC and low-density lipoprotein cholesterol levels in subjects with endogenous hypertriglyceridemia. The Arg16Gly polymorphism in beta2-adrenergic receptor gene may be associated with TG and/or cholesterol metabolism in Chinese Han population.     

中国人内源性高甘油三酯血症患者载脂蛋白AⅣ基因VNTR多态性的分析

目的探讨载脂蛋白AⅣ(apolipoproteinAⅣ,apoAⅣ)基因变异与中国人内源性高甘油三酯血症是否有关联,为研究本病的分子遗传基础提供依据.方法应用多聚酶链反应和DNA片段序列分析法,对48名正常人及47例内源性高甘油三酯血症(endogenous hypertriglyceridemia,HTG)患者apoAⅣ基因3′端可变串联重复序列(variablenumbertandemrepeat,VNTR)进行分析.结果中国人apoAⅣ基因3′端VNTR多态位点CTGT三连重复[(CTGT)3]等位基因的频率为0.253,与德国白种人的0.607和意大利白种人的0.522差异存在显著性(P＜0.01,P＜0.01),而与日本人的0.262相近(P＞0.05).HTG组和对照组之间(CTGT)3等位基因的频率差异无显著性(0.223vs0.281,P＞0.05),对照组VNTR3/3基因型携带者其血清LDLC水平显著高于3/4型携带者(3.698±0.67mmol/Lvs2.974±0.54mmol/L,P＜0.05).结论apoAⅣ基因VNTR多态性与血清低密度脂蛋白胆固醇(low-density lipoprotein     

The importance of plasma apolipoprotein E concentration in addition to its common polymorphism on inter-individual variation in lipid levels: results from Apo Europe

Interindividual variation in the concentration of plasma lipids which are associated with coronary artery disease (CAD) risk is determined by a combination of genetic and environmental factors. This study investigates the effects of apoE genotype and plasma concentration on cholesterol and triglycerides (TG) levels in subjects from five countries: Finland, France, Northern Ireland, Portugal, and Spain. Age and sex significantly influenced serum cholesterol, TG and apoE concentrations. The age effect differs in males and females. The allele frequencies of the apoE gene, one of the most widely studied CAD susceptibility genes, were determined: the epsilon2 allele frequency and the apoE concentration showed a north-south increasing gradient while the epsilon4 allele frequency showed the reverse. ApoE plays an important role in lipid metabolism. Total cholesterol and TG concentrations were significantly dependent on apoE genotype in both sexes. These differences in lipids between genotypes were more pronounced when plasma apoE concentrations were taken into account.     

Lipid profile of body builders with and without self-administration of anabolic steroids

Summary Twenty-four top-level body builders [13 anabolic steroid users (A); 11 non-users (N)] and 11 performance-matched controls (C) were examined to determine the effect on lipids, lipoproteins and apolipoproteins of many years of body building with and without simultaneous intake of anabolic steroids and testosterone. After an overnight fast, triglycerides (TG), total cholesterol (TOTC), high density lipoprotein cholesterol (HDLC), low density lipoprotein cholesterol (LDLC), the HDLC subfractions HDL₂C and HDL₃C, as well as apolipoprotein A-I (Apo A-I), apolipoprotein A-II (Apo A-II) and apolipoprotein B (Apo B) were determined. Both A and N, compared to C, showed significantly lower HDLC and higher LDLC concentrations, with the differences between A and C clearly pronounced. In a subgroup of 6 body builders taking anabolic steroids at the time of the study, HDLC, HDL₂C, HDL₃C, Apo A-I and Apo A-II were all significantly lower and LDLC was significantly higher than in a second subgroup of 7 body builders who had discontinued their intake of anabolic steroids at least 4 weeks prior to the study. In some single cases HDLC was barely detectable (2–7 mg·dl⁻¹). The TG and TOTC remained unchanged. The present findings suggest that many years of body building among top-level athletes have no beneficial effect on lipoproteins and apolipoproteins. Simultaneous use of anabolic steroids results in part in extreme alterations in lipoproteins and apolipoproteins, representing an atherogenic profile. After discontinuing the use of anabolic steroids, the changes in lipid metabolism appear to be reversible.