AIM:To prospectively investigate the association between the XbaⅠpolymorphisms of apolipoprotein B (APOB)gene and gallstone formation following gastrectomy.METHODS:The study was conducted between January 2005 and Dec...AIM:To prospectively investigate the association between the XbaⅠpolymorphisms of apolipoprotein B (APOB)gene and gallstone formation following gastrectomy.METHODS:The study was conducted between January 2005 and December 2006.A total of 186 gastric cancer patients who had undergone radical gastrectomy were grouped according to XbaⅠpolymorphisms of APOB gene(X+X-group,n=24 and X-X-group,n =162)and compared.The XbaⅠpolymorphisms of APOB gene were detected by polymerase chain reaction-restriction fragment length polymorphism(PCRRFLP).RESULTS:The incidence of gallstone was significantly higher in the X + X-group than in the X-X-group[54.2% vs 9.3%,RR=5.85(2.23-15.32),P<0.001].The serum levels of total cholesterol(TC)and low-density lipoprotein(LDL)were higher in the X + X-than in the X-X-group(4.02±1.12 vs 3.48±0.88,P=0.004 before surgery and 3.88±1.09 vs 3.40±0.86,P=0.008 after surgery).LDL was 2.21±0.96 vs 1.89±0.84(P =0.042)before surgery and 2.09±0.95 vs 1.72±0.85 (P=0.029)after surgery in the two groups.No relationship was found between XbaⅠpolymorphisms and gallbladder motility.CONCLUSION:In Chinese patients after radical gastrectomy,X + allele of APOB gene is another risk factor for the development of gallstone besides the gallbladder motility disorder after surgery.展开更多
The authors utilized the polymerase chain reaction to rapidly and accurately type a variable number of tandemly repeated loci (VNTR loci) of the 3’ flanking region of apolipoprotein B (apo B) gene, and studied the re...The authors utilized the polymerase chain reaction to rapidly and accurately type a variable number of tandemly repeated loci (VNTR loci) of the 3’ flanking region of apolipoprotein B (apo B) gene, and studied the relationship between this loci polymorphisms and coronary heart disease (CAD); comparisons were made with relative diseases and展开更多
Two polymorphic sites of apolipoprotein B(apoB) gene-Xbal and EcoRI were examined in a sample of 103 patients with documented coronary heart disease (CHD) and 100 healthy individuals. It was demonstrated: (1) Th...Two polymorphic sites of apolipoprotein B(apoB) gene-Xbal and EcoRI were examined in a sample of 103 patients with documented coronary heart disease (CHD) and 100 healthy individuals. It was demonstrated: (1) The frequencies of rare Xallele (presence of Xbal cutting site) and E-allele (absence of cutting site) were significantly higher in CHD patients than those in controls. It was suggested that these genetic variations were associated with CHD. (2) The patients with genotype of XXhad significantly lower展开更多
AIM: To investigate the effect of high homocysteine(Hcy) levels on apolipoprotein E(apoE) expression and the signaling pathways involved in this gene regulation.METHODS: Reverse transcriptase polymerase chain reaction...AIM: To investigate the effect of high homocysteine(Hcy) levels on apolipoprotein E(apoE) expression and the signaling pathways involved in this gene regulation.METHODS: Reverse transcriptase polymerase chain reaction(RT-PCR) and Western blot were used to assess apo E expression in cells treated with various concentrations(50-500 μmol/L) of Hcy. Calcium phosphatetransient transfections were performed in HEK-293 and RAW 264.7 cells to evaluate the effect of Hcy on apoE regulatory elements [promoter and distal multienhancer 2(ME2)]. To this aim, plasmids containing the proximal apoE promoter [(-500/+73)apoE construct] alone or in the presence of ME2 [ME2/(-500/+73)apoE construct] to drive the expression of the reporter luciferase gene were used. Co-transfection experiments were carried out to investigate the downstream effectors of Hcymediated regulation of apoE promoter by using specific inhibitors or a dominant negative form of IKβ. In other co-transfections, the luciferase reporter was under the control of synthetic promoters containing multiple specific binding sites for nuclear factor kappa B(NF-κB), activator protein-1(AP-1) or nuclear factor of activated T cells(NFAT). Chromatin immunoprecipitation(ChI P)assay was accomplished to detect the binding of NF-κB p65 subunit to the apoE promoter in HEK-293 treated with 500 μmol/L Hcy. As control, cells were incubated with similar concentration of cysteine. NF-κB p65 proteins bound to DNA were immunoprecipitated with anti-p65 antibodies and DNA was identified by PCR using primers amplifying the region-100/+4 of the apoE gene. RESULTS: RT-PCR revealed that high levels of Hcy(250-750 μmol/L) induced a 2-3 fold decrease in apoE m RNA levels in HEK-293 cells, while apo E gene expression was not significantly affected by treatment with lower concentrations of Hcy(100 μmol/L). Immunoblotting data provided additional evidence for the negative role of Hcy in apoE expression. Hcy decreased apoE promoter activity, in the presence or absence of ME2, in a dose dependent manner, in both RAW 264.7 and HEK-293 cells, as revealed by transient transfection experiments. The downstream effectors of the signaling pathways of Hcy were also investigated. The inhibitory effect of Hcy on the apo E promoter activity was counteracted by MAPK/ERK kinase 1/2(MEK1/2) inhibitor U0126, suggesting that MEK1/2 is involved in the downregulation of apoE promoter activity by Hcy. Our data demonstrated that Hcy-induced inhibition of apoE took place through activation of NF-κB. Moreover, we demonstrated that Hcy activated a synthetic promoter containing three NF-κB binding sites, but did not affect promoters containing AP-1 or NFAT binding sites. ChI P experiments revealed that NF-κB p65 subunit is recruited to the apoE promoter following Hcy treatment of cells.CONCLUSION: Hcy-induced stress negatively modulates apoE expression via MEK1/2 and NF-κB activation. The decreased apo E expression in peripheral tissues may aggravate atherosclerosis, neurodegenerative diseases and renal dysfunctions.展开更多
目的:探讨载脂蛋白A1、B基因多态性对非创伤性股骨头坏死(avascular necrosis of the femoral head,ANFH)发生的影响。方法:应用聚合酶链反应对中国北方汉族143例ANFH患者和92例正常人分别扩增含ApoA1基因启动子-75bp和第一内含子+83bp...目的:探讨载脂蛋白A1、B基因多态性对非创伤性股骨头坏死(avascular necrosis of the femoral head,ANFH)发生的影响。方法:应用聚合酶链反应对中国北方汉族143例ANFH患者和92例正常人分别扩增含ApoA1基因启动子-75bp和第一内含子+83bp及ApoB基因EcoRI、XbaI和3'!VNTR的DNA片段,限制性内切酶酶切扩增产物,琼脂糖凝胶电泳分离基因多态性。结果:ApoA1基因启动子-75bp处,ANFH患者中A/A基因型频率明显高于正常组(P<0.01),而G/A基因型频率明显低于正常组(P<0.01)。ApoA1内含子+83bp位点,ApoB基因EcoRI、XbaI位点和3'!VNTR区域ANFH患者组和正常组基因型及等位基因频率分布无统计学差异。结论:ApoA1基因启动子区域-75bp位点A/A型可能是非创伤性股骨头坏死易感基因之一,但未能发现ApoA1第一内含子+83bp位点及ApoB基因EcoRI、XbaI和3'!VNTR位点多态性与非创伤性股骨头坏死发生有明显的关系。展开更多
目的:分析载脂蛋白B(apolipoprotein B,apo B)基因C7673T多态性与长沙地区汉族人群脑出血的关系及其对血脂水平的影响。方法:采用聚合酶链式反应-限制性片段长度多态性分析法(polymerase chain reaction-restriction fragment length po...目的:分析载脂蛋白B(apolipoprotein B,apo B)基因C7673T多态性与长沙地区汉族人群脑出血的关系及其对血脂水平的影响。方法:采用聚合酶链式反应-限制性片段长度多态性分析法(polymerase chain reaction-restriction fragment length polymorphism,PCR-RFLP)和DNA直接测序法检测130例脑出血患者和100例正常对照者的apoB基因C7673T多态;并用氧化酶法测定其血清甘油三酯(triglyceride,TG)、总胆固醇(total cholesterol,TC)、高密度脂蛋白(high density lipoprotein-cholesterol,HDL)、低密度脂蛋白(low density lipoprotein-cholesterol,LDL)水平;酶联免疫吸附法测定脂蛋白(a)[lipoprotein(a),LP(a)]浓度;免疫比浊法测定apoB100及apoAI浓度。结果:(1)脑出血组和对照组apoB基因C7673T多态T等位基因频率分别为0.108和0.040,脑出血患者组apoB基因C7673T多态T等位基因频率显著高于对照组(P<0.01)。(2)脑出血组apoB基因C7673T多态T/C基因型较C/C基因型的TC和LDL-C显著增高,而HDL-C显著降低(P<0.05),其它指标差异无统计学意义(P>0.05)。结论:apoB基因C7673T多态可能与长沙地区汉族人群脑出血有关,且可能通过改变血脂水平影响脑出血的发生发展。展开更多
目的分析长沙地区汉族人群脑出血患者血脂水平与载脂蛋白B基因(apolipoprotein B,apoB)G12669A多态性的关系。方法收集93例散发性脑出血患者和100例正常对照者的外周血标本。采用氧化酶法测定血清甘油三酯(triglycerides,TG)、总胆固醇(...目的分析长沙地区汉族人群脑出血患者血脂水平与载脂蛋白B基因(apolipoprotein B,apoB)G12669A多态性的关系。方法收集93例散发性脑出血患者和100例正常对照者的外周血标本。采用氧化酶法测定血清甘油三酯(triglycerides,TG)、总胆固醇(total cholesterol,TC)、高密度脂蛋白(high density lipoprotein cholesterol,HDL)、低密度脂蛋白(low density lipoprotein cholesterol,LDL)水平,酶联免疫吸附法测定LP(a)浓度,免疫比浊法测定apoB100及apoAI浓度;聚合酶链式反应-限制性片段长度多态性分析法(Polymerase Chain Reaction-Restriction Fragment Length Polymorphism,PCR-RFLP)和DNA直接测序法检测apoB基因G12669A多态性。结果①长沙地区汉族人群脑出血患者的TC、TG、LDL-C和LP(a)显著高于正常对照组,而HDL-C显著降低(P<0.05);②脑出血组中,G/A基因型的TC、TG、LDL-C较之G/G型显著增高,而HDL-C则显著降低(P<0.05),其他指标无显著性差异(P>0.05);③脑出血组及对照组apoB基因G12669A多态A等位基因频率分别为0.097、0.045,脑出血组apoB基因G12669A多态A等位基因频率显著高于对照组(P<0.05)。结论长沙地区汉族人群脑出血患者的血脂水平升高,可能与apoB基因G12669A多态A等位基因存在相关性。展开更多
目的:研究载脂蛋白B基因XbaⅠ、EcoRⅠ位点多态性和胆石病之间的关系。方法:通过病例对照研究设计,采用PCR-RFLP技术对106例胆石病患者和105例对照者进行基因分析。结果:胆石病组和对照组ApoB基因XbaⅠ位点X+X-、X-X-基因型构成显著不等...目的:研究载脂蛋白B基因XbaⅠ、EcoRⅠ位点多态性和胆石病之间的关系。方法:通过病例对照研究设计,采用PCR-RFLP技术对106例胆石病患者和105例对照者进行基因分析。结果:胆石病组和对照组ApoB基因XbaⅠ位点X+X-、X-X-基因型构成显著不等;胆石病组X+等位基因频率显著高于对照组(0.104 vs 0.052);胆石病组和对照组ApoB基因EcoRⅠ位点E+E-和E+E+基因型频率构成差异显著,病例组E-等位基因频率显著高于对照组。结论:胆石病发生与ApoB基因XbaⅠ、EcoRⅠ位点多态性存在关联,XbaⅠX+等位基因和EcoRⅠE-等位基因可能为胆石病的易感基因。展开更多
基金Supported by Zhongshan Hospital,Fudan University,Shanghai,China
文摘AIM:To prospectively investigate the association between the XbaⅠpolymorphisms of apolipoprotein B (APOB)gene and gallstone formation following gastrectomy.METHODS:The study was conducted between January 2005 and December 2006.A total of 186 gastric cancer patients who had undergone radical gastrectomy were grouped according to XbaⅠpolymorphisms of APOB gene(X+X-group,n=24 and X-X-group,n =162)and compared.The XbaⅠpolymorphisms of APOB gene were detected by polymerase chain reaction-restriction fragment length polymorphism(PCRRFLP).RESULTS:The incidence of gallstone was significantly higher in the X + X-group than in the X-X-group[54.2% vs 9.3%,RR=5.85(2.23-15.32),P<0.001].The serum levels of total cholesterol(TC)and low-density lipoprotein(LDL)were higher in the X + X-than in the X-X-group(4.02±1.12 vs 3.48±0.88,P=0.004 before surgery and 3.88±1.09 vs 3.40±0.86,P=0.008 after surgery).LDL was 2.21±0.96 vs 1.89±0.84(P =0.042)before surgery and 2.09±0.95 vs 1.72±0.85 (P=0.029)after surgery in the two groups.No relationship was found between XbaⅠpolymorphisms and gallbladder motility.CONCLUSION:In Chinese patients after radical gastrectomy,X + allele of APOB gene is another risk factor for the development of gallstone besides the gallbladder motility disorder after surgery.
文摘The authors utilized the polymerase chain reaction to rapidly and accurately type a variable number of tandemly repeated loci (VNTR loci) of the 3’ flanking region of apolipoprotein B (apo B) gene, and studied the relationship between this loci polymorphisms and coronary heart disease (CAD); comparisons were made with relative diseases and
文摘Two polymorphic sites of apolipoprotein B(apoB) gene-Xbal and EcoRI were examined in a sample of 103 patients with documented coronary heart disease (CHD) and 100 healthy individuals. It was demonstrated: (1) The frequencies of rare Xallele (presence of Xbal cutting site) and E-allele (absence of cutting site) were significantly higher in CHD patients than those in controls. It was suggested that these genetic variations were associated with CHD. (2) The patients with genotype of XXhad significantly lower
基金Supported by The grant of the Romanian National Authority for Scientific Research,National Research Council-Executive Agency for Higher Education,Research,Development and Innovation Funding,No.PN-II-ID-PCE-2011-3-0591(grant awarded to Gafencu AV)the Romanian Academy,and the strategic grant financed by the European Social Found within the Sectorial Operational Program Human Resources Development 2007-2013,No.POSDRU/159/1.5/S/133391(Fenyo IM and Trusca VG)
文摘AIM: To investigate the effect of high homocysteine(Hcy) levels on apolipoprotein E(apoE) expression and the signaling pathways involved in this gene regulation.METHODS: Reverse transcriptase polymerase chain reaction(RT-PCR) and Western blot were used to assess apo E expression in cells treated with various concentrations(50-500 μmol/L) of Hcy. Calcium phosphatetransient transfections were performed in HEK-293 and RAW 264.7 cells to evaluate the effect of Hcy on apoE regulatory elements [promoter and distal multienhancer 2(ME2)]. To this aim, plasmids containing the proximal apoE promoter [(-500/+73)apoE construct] alone or in the presence of ME2 [ME2/(-500/+73)apoE construct] to drive the expression of the reporter luciferase gene were used. Co-transfection experiments were carried out to investigate the downstream effectors of Hcymediated regulation of apoE promoter by using specific inhibitors or a dominant negative form of IKβ. In other co-transfections, the luciferase reporter was under the control of synthetic promoters containing multiple specific binding sites for nuclear factor kappa B(NF-κB), activator protein-1(AP-1) or nuclear factor of activated T cells(NFAT). Chromatin immunoprecipitation(ChI P)assay was accomplished to detect the binding of NF-κB p65 subunit to the apoE promoter in HEK-293 treated with 500 μmol/L Hcy. As control, cells were incubated with similar concentration of cysteine. NF-κB p65 proteins bound to DNA were immunoprecipitated with anti-p65 antibodies and DNA was identified by PCR using primers amplifying the region-100/+4 of the apoE gene. RESULTS: RT-PCR revealed that high levels of Hcy(250-750 μmol/L) induced a 2-3 fold decrease in apoE m RNA levels in HEK-293 cells, while apo E gene expression was not significantly affected by treatment with lower concentrations of Hcy(100 μmol/L). Immunoblotting data provided additional evidence for the negative role of Hcy in apoE expression. Hcy decreased apoE promoter activity, in the presence or absence of ME2, in a dose dependent manner, in both RAW 264.7 and HEK-293 cells, as revealed by transient transfection experiments. The downstream effectors of the signaling pathways of Hcy were also investigated. The inhibitory effect of Hcy on the apo E promoter activity was counteracted by MAPK/ERK kinase 1/2(MEK1/2) inhibitor U0126, suggesting that MEK1/2 is involved in the downregulation of apoE promoter activity by Hcy. Our data demonstrated that Hcy-induced inhibition of apoE took place through activation of NF-κB. Moreover, we demonstrated that Hcy activated a synthetic promoter containing three NF-κB binding sites, but did not affect promoters containing AP-1 or NFAT binding sites. ChI P experiments revealed that NF-κB p65 subunit is recruited to the apoE promoter following Hcy treatment of cells.CONCLUSION: Hcy-induced stress negatively modulates apoE expression via MEK1/2 and NF-κB activation. The decreased apo E expression in peripheral tissues may aggravate atherosclerosis, neurodegenerative diseases and renal dysfunctions.
文摘目的:探讨载脂蛋白A1、B基因多态性对非创伤性股骨头坏死(avascular necrosis of the femoral head,ANFH)发生的影响。方法:应用聚合酶链反应对中国北方汉族143例ANFH患者和92例正常人分别扩增含ApoA1基因启动子-75bp和第一内含子+83bp及ApoB基因EcoRI、XbaI和3'!VNTR的DNA片段,限制性内切酶酶切扩增产物,琼脂糖凝胶电泳分离基因多态性。结果:ApoA1基因启动子-75bp处,ANFH患者中A/A基因型频率明显高于正常组(P<0.01),而G/A基因型频率明显低于正常组(P<0.01)。ApoA1内含子+83bp位点,ApoB基因EcoRI、XbaI位点和3'!VNTR区域ANFH患者组和正常组基因型及等位基因频率分布无统计学差异。结论:ApoA1基因启动子区域-75bp位点A/A型可能是非创伤性股骨头坏死易感基因之一,但未能发现ApoA1第一内含子+83bp位点及ApoB基因EcoRI、XbaI和3'!VNTR位点多态性与非创伤性股骨头坏死发生有明显的关系。
文摘目的:分析载脂蛋白B(apolipoprotein B,apo B)基因C7673T多态性与长沙地区汉族人群脑出血的关系及其对血脂水平的影响。方法:采用聚合酶链式反应-限制性片段长度多态性分析法(polymerase chain reaction-restriction fragment length polymorphism,PCR-RFLP)和DNA直接测序法检测130例脑出血患者和100例正常对照者的apoB基因C7673T多态;并用氧化酶法测定其血清甘油三酯(triglyceride,TG)、总胆固醇(total cholesterol,TC)、高密度脂蛋白(high density lipoprotein-cholesterol,HDL)、低密度脂蛋白(low density lipoprotein-cholesterol,LDL)水平;酶联免疫吸附法测定脂蛋白(a)[lipoprotein(a),LP(a)]浓度;免疫比浊法测定apoB100及apoAI浓度。结果:(1)脑出血组和对照组apoB基因C7673T多态T等位基因频率分别为0.108和0.040,脑出血患者组apoB基因C7673T多态T等位基因频率显著高于对照组(P<0.01)。(2)脑出血组apoB基因C7673T多态T/C基因型较C/C基因型的TC和LDL-C显著增高,而HDL-C显著降低(P<0.05),其它指标差异无统计学意义(P>0.05)。结论:apoB基因C7673T多态可能与长沙地区汉族人群脑出血有关,且可能通过改变血脂水平影响脑出血的发生发展。
文摘目的分析长沙地区汉族人群脑出血患者血脂水平与载脂蛋白B基因(apolipoprotein B,apoB)G12669A多态性的关系。方法收集93例散发性脑出血患者和100例正常对照者的外周血标本。采用氧化酶法测定血清甘油三酯(triglycerides,TG)、总胆固醇(total cholesterol,TC)、高密度脂蛋白(high density lipoprotein cholesterol,HDL)、低密度脂蛋白(low density lipoprotein cholesterol,LDL)水平,酶联免疫吸附法测定LP(a)浓度,免疫比浊法测定apoB100及apoAI浓度;聚合酶链式反应-限制性片段长度多态性分析法(Polymerase Chain Reaction-Restriction Fragment Length Polymorphism,PCR-RFLP)和DNA直接测序法检测apoB基因G12669A多态性。结果①长沙地区汉族人群脑出血患者的TC、TG、LDL-C和LP(a)显著高于正常对照组,而HDL-C显著降低(P<0.05);②脑出血组中,G/A基因型的TC、TG、LDL-C较之G/G型显著增高,而HDL-C则显著降低(P<0.05),其他指标无显著性差异(P>0.05);③脑出血组及对照组apoB基因G12669A多态A等位基因频率分别为0.097、0.045,脑出血组apoB基因G12669A多态A等位基因频率显著高于对照组(P<0.05)。结论长沙地区汉族人群脑出血患者的血脂水平升高,可能与apoB基因G12669A多态A等位基因存在相关性。
文摘目的:研究载脂蛋白B基因XbaⅠ、EcoRⅠ位点多态性和胆石病之间的关系。方法:通过病例对照研究设计,采用PCR-RFLP技术对106例胆石病患者和105例对照者进行基因分析。结果:胆石病组和对照组ApoB基因XbaⅠ位点X+X-、X-X-基因型构成显著不等;胆石病组X+等位基因频率显著高于对照组(0.104 vs 0.052);胆石病组和对照组ApoB基因EcoRⅠ位点E+E-和E+E+基因型频率构成差异显著,病例组E-等位基因频率显著高于对照组。结论:胆石病发生与ApoB基因XbaⅠ、EcoRⅠ位点多态性存在关联,XbaⅠX+等位基因和EcoRⅠE-等位基因可能为胆石病的易感基因。