Objective:To evaluate the influence of–250G>A(rs2070895)polymorphism in hepatic lipase gene(LIPC)promoter on plasma lipid parameters of ischemic stroke patients.Methods:A total of 100 stroke patients and 100 contr...Objective:To evaluate the influence of–250G>A(rs2070895)polymorphism in hepatic lipase gene(LIPC)promoter on plasma lipid parameters of ischemic stroke patients.Methods:A total of 100 stroke patients and 100 control subjects matched for sex(59 men and 41 women)and age were selected.Hepatic lipase activity and lipid profiles were measured while lipoprotein ratios were calculated.Genotyping of the–250G>A promoter polymorphism of the LIPC was performed by the polymerase chain reaction and restriction fragment length polymorphism method combined with 2%gel electrophoresis and then confirmed by direct sequencing.The LIPC promoter gene sequencing data were compared with refseqNG011465.1 LIPC from GenBank.Results:The frequencies of GG,GA and AA genotypes of LIPC rs2070895 polymorphism were 39%,45%and 16%for the control,10%,37%and 53%for the stroke subjects(P<0.0001),respectively.The frequencies of G and A alleles were 61.5%and 38.5%for the control,and 28.5%and 71.5%for the stroke subjects(P<0.0001).Our study shows that the mutant allele of the LIPC promoter was associated with dyslipidemia,lower hepatic lipase activity,and this variation contributed to the increased defective plasma high-density lipoprotein-cholesterol(HDL-C),HDL2-C and HDL3-C concentration for both subjects.The control subjects had 6 single nucleotide polymorphism and 6 amino acid substitutions while the stroke subjects had 32 single nucleotide polymorphism and 20 amino acid substitutions.Conclusions:LIPC–250G>A polymorphism can influence plasma lipid profiles and lipoprotein ratios in patients with ischemic stroke.展开更多
目的研究姜黄素甲氧基水解及酚羟基酯化后的结构修饰物调血脂、抗脂质过氧化作用和对脂代谢相关酶类活性的影响,初步比较其构效关系,以期寻找到结构比姜黄素更适配的化合物,用于调血脂。方法用盐酸水解姜黄素甲氧基获得姜黄素水解物(HCu...目的研究姜黄素甲氧基水解及酚羟基酯化后的结构修饰物调血脂、抗脂质过氧化作用和对脂代谢相关酶类活性的影响,初步比较其构效关系,以期寻找到结构比姜黄素更适配的化合物,用于调血脂。方法用盐酸水解姜黄素甲氧基获得姜黄素水解物(HCur);用丁二酸酐酯化姜黄素酚羟基获得姜黄素酯化物(ECur);高脂膳食喂饲Wistar大鼠,建立食饵性高脂血症模型,用姜黄素(curcumin)、HCur和ECur进行实验性治疗,给药3周后处死动物,测定血清和肝脏总胆固醇(total cholester-ol,TC)、甘油三酯(triglyceride,TG)和血清高密度脂蛋白(high density lipoprotein cholesterol,HDL-C)含量,计算低密度脂蛋白(low density lipoprotein cholesterol LDL-C)含量,同时测定肝素化血浆总脂解酶(post heparin total activity,PHTA)、脂蛋白脂酶(lipoprotein lipase,LPL)和肝脂酶(hepatic lipase,HL)的活性及血清丙二醛(malondialdehyde,MDA)含量。结果①姜黄素能降低血清和肝脏TC、TG、LDL-C和MDA含量,升高血清HDL-C含量,提高PHTA活性。②HCur能降低TC、LDL-C、TG和MDA含量,能显著提高PHTA与LPL活性。③ECur仅具降LDL-C作用。结论HCur可降低肝脏和血清脂质及血清MDA含量,尤其能提高TG代谢相关酶活性,而ECur仅能降低LDL-C含量,其他活性均不显著,提示姜黄素结构上的酚羟基在降血脂中起重要作用。展开更多
目的系统评价人类肝脂肪酶(LIPC)基因rs10468017多态性与年龄相关性黄斑变性(AMD)易感性的关系。方法计算机检索英文数据库(PubMed、Embase、EBSCO、Web of Knowledge、Cochrane图书馆)及中文数据库(中国知网、万方数据、维普、中国生...目的系统评价人类肝脂肪酶(LIPC)基因rs10468017多态性与年龄相关性黄斑变性(AMD)易感性的关系。方法计算机检索英文数据库(PubMed、Embase、EBSCO、Web of Knowledge、Cochrane图书馆)及中文数据库(中国知网、万方数据、维普、中国生物医学文献数据库)自建库起至2019年12月31日关于LIPC基因rs10468017多态性位点与AMD研究的文献。采用Stata 12.0软件计算等位基因模型(T和C)、杂合子模型(TC和CC)及纯合子模型(TT和CC)3种遗传模型下该多点性位点和AMD相关性的比值比(OR值)及95%置信区间(CI),并进一步按AMD类型和种族进行亚组分析,分别计算OR值及95%CI,进行Meta分析。结果本研究共纳入21篇文献,包括AMD患者25649例和正常对照人群26294例。Meta分析结果显示,rs10468017多态性的T等位基因与AMD发生风险显著相关(T vs.C:OR=0.83,95%CI:0.80~0.87;TC vs.CC:OR=0.82,95%CI:0.75~0.90;TT vs.CC:OR=0.65,95%CI:0.56~0.76)。亚组分析结果显示,rs10468017多态性与早期AMD(OR=0.87,95%CI:0.78~0.96)、晚期AMD(OR=0.83,95%CI:0.77~0.88)、地图样萎缩(OR=0.79,95%CI:0.72~0.87)及脉络膜新生血管(OR=0.83,95%CI:0.78~0.89)均相关。进一步对种族进行分层分析显示,高加索人群中T等位基因与AMD相关(早期AMD:OR=0.77,95%CI:0.67~0.89;晚期AMD:OR=0.80,95%CI:0.75~0.87),亚洲人群中T等位基因与AMD无显著相关性(早期AMD:OR=0.98,95%CI:0.85~1.13;晚期AMD:OR=0.93,95%CI:0.81~1.06)。结论rs10468017多态性的T等位基因与AMD显著相关,可降低AMD的发生风险,虽然这种相关性存在于AMD的各个表型中,但是存在一定的种族差异。展开更多
文摘Objective:To evaluate the influence of–250G>A(rs2070895)polymorphism in hepatic lipase gene(LIPC)promoter on plasma lipid parameters of ischemic stroke patients.Methods:A total of 100 stroke patients and 100 control subjects matched for sex(59 men and 41 women)and age were selected.Hepatic lipase activity and lipid profiles were measured while lipoprotein ratios were calculated.Genotyping of the–250G>A promoter polymorphism of the LIPC was performed by the polymerase chain reaction and restriction fragment length polymorphism method combined with 2%gel electrophoresis and then confirmed by direct sequencing.The LIPC promoter gene sequencing data were compared with refseqNG011465.1 LIPC from GenBank.Results:The frequencies of GG,GA and AA genotypes of LIPC rs2070895 polymorphism were 39%,45%and 16%for the control,10%,37%and 53%for the stroke subjects(P<0.0001),respectively.The frequencies of G and A alleles were 61.5%and 38.5%for the control,and 28.5%and 71.5%for the stroke subjects(P<0.0001).Our study shows that the mutant allele of the LIPC promoter was associated with dyslipidemia,lower hepatic lipase activity,and this variation contributed to the increased defective plasma high-density lipoprotein-cholesterol(HDL-C),HDL2-C and HDL3-C concentration for both subjects.The control subjects had 6 single nucleotide polymorphism and 6 amino acid substitutions while the stroke subjects had 32 single nucleotide polymorphism and 20 amino acid substitutions.Conclusions:LIPC–250G>A polymorphism can influence plasma lipid profiles and lipoprotein ratios in patients with ischemic stroke.
文摘目的研究姜黄素甲氧基水解及酚羟基酯化后的结构修饰物调血脂、抗脂质过氧化作用和对脂代谢相关酶类活性的影响,初步比较其构效关系,以期寻找到结构比姜黄素更适配的化合物,用于调血脂。方法用盐酸水解姜黄素甲氧基获得姜黄素水解物(HCur);用丁二酸酐酯化姜黄素酚羟基获得姜黄素酯化物(ECur);高脂膳食喂饲Wistar大鼠,建立食饵性高脂血症模型,用姜黄素(curcumin)、HCur和ECur进行实验性治疗,给药3周后处死动物,测定血清和肝脏总胆固醇(total cholester-ol,TC)、甘油三酯(triglyceride,TG)和血清高密度脂蛋白(high density lipoprotein cholesterol,HDL-C)含量,计算低密度脂蛋白(low density lipoprotein cholesterol LDL-C)含量,同时测定肝素化血浆总脂解酶(post heparin total activity,PHTA)、脂蛋白脂酶(lipoprotein lipase,LPL)和肝脂酶(hepatic lipase,HL)的活性及血清丙二醛(malondialdehyde,MDA)含量。结果①姜黄素能降低血清和肝脏TC、TG、LDL-C和MDA含量,升高血清HDL-C含量,提高PHTA活性。②HCur能降低TC、LDL-C、TG和MDA含量,能显著提高PHTA与LPL活性。③ECur仅具降LDL-C作用。结论HCur可降低肝脏和血清脂质及血清MDA含量,尤其能提高TG代谢相关酶活性,而ECur仅能降低LDL-C含量,其他活性均不显著,提示姜黄素结构上的酚羟基在降血脂中起重要作用。
