目的观察高脂饲料喂养的小鼠心脏和肺组织中内皮型一氧化氮合酶(endothelial nitric-oxide syn-thase,eNOS)及血红素氧合酶-1(heme oxygenase-1,HO-1)的含量变化,探讨高脂血症对eNOS和HO-1表达的影响。方法高脂饮食组(n=8)和普通饮食组(...目的观察高脂饲料喂养的小鼠心脏和肺组织中内皮型一氧化氮合酶(endothelial nitric-oxide syn-thase,eNOS)及血红素氧合酶-1(heme oxygenase-1,HO-1)的含量变化,探讨高脂血症对eNOS和HO-1表达的影响。方法高脂饮食组(n=8)和普通饮食组(n=8)C57BL/6小鼠分别经高脂饲料和普通饲料喂养18周后,测血清总胆固醇(total cholesterol,TC)、三酰甘油(triglyceride,TG)、高密度脂蛋白(high density lipopro-tein,HDL)和低密度脂蛋白(low density lipoprotein,LDL)含量,采用Real-ti me PCR检测心脏和肺组织中eNOS及HO-1的mRNA水平,以免疫组化方法检测其蛋白表达。结果高脂饮食组TC、TG和LDL明显高于普通饮食组,HDL则低于普通饮食组;高脂饮食组心脏和肺组织中eNOS的mRNA和蛋白水平低于普通饮食组,HO-1的mRNA和蛋白水平高于普通饮食组。结论高脂饲料喂养能使小鼠形成高脂血症,并引起心脏和肺组织中eNOS的表达降低,同时HO-1的表达升高。展开更多
Objective:To explore the mechanism of Profilin-1 in regulating eNOS/NO pathway and its role in the development of myocardial hypertrophy.Methods:Spontaneously hypertensive rats(SHR) aged 5 weeks were injected with dif...Objective:To explore the mechanism of Profilin-1 in regulating eNOS/NO pathway and its role in the development of myocardial hypertrophy.Methods:Spontaneously hypertensive rats(SHR) aged 5 weeks were injected with different adenovirus vectors to induce Profilin-1expression knockdown(SHR-I) or over express(SHR-H) or to use as control(SHR-C).All these treatment were compared with Wistar-Kyoto rats(SKY) treated with control adenovirus vectors(WKY-C).The same injection was executed at the sixth week during the experiment of 12 weeks.After experiment,the left ventricular weight-to-heart weight ratio(LVW/HW)and left ventricular long axis(LVLA) were measured.Meanwhile.NO contents in blood and myocardium,Profilin-1,eNOS and Caveolin-3 niRNA and protein levels and phosphorylated eNOS(P-eNOS) protein level in myocardium were determined.Results:Compared with WKY-C group,the SHR-C group was statistically higher in LVW/HW(0.79±0.03).LVLA(11.82±0.58 mm) and Profilin-1 niRNA and prolein level(P<0.05).but lower in NO content[(18.63±6.23) μmol/L| in blood and[(2.71±0.17) μmol/L]in myocardium).eNOS activity and Caveolin-3 expression(P<0.05).The over expressing Profilin-1 led SHR-H group to a higher value of LVW/HW[(0.93±0.03) mm and LVLA(14.17±0.69) mm]in comparison with SHR-C group(P<0.05).and to a lower value of NO content(in myocardium).eNOS activity and Caveolin-3 expression(P<0.05):however,this phenomenon was reversed by the knockdown Profilin-1 expression(SHR-I group).Conclusions:Profilin-1 expression,being negative in regulating Caveolin-3 expression and eNOS/NO pathway activity,promotes the development of myocardial hypertrophy which can be reversed by Profilin-1 silencing.展开更多
文摘目的观察高脂饲料喂养的小鼠心脏和肺组织中内皮型一氧化氮合酶(endothelial nitric-oxide syn-thase,eNOS)及血红素氧合酶-1(heme oxygenase-1,HO-1)的含量变化,探讨高脂血症对eNOS和HO-1表达的影响。方法高脂饮食组(n=8)和普通饮食组(n=8)C57BL/6小鼠分别经高脂饲料和普通饲料喂养18周后,测血清总胆固醇(total cholesterol,TC)、三酰甘油(triglyceride,TG)、高密度脂蛋白(high density lipopro-tein,HDL)和低密度脂蛋白(low density lipoprotein,LDL)含量,采用Real-ti me PCR检测心脏和肺组织中eNOS及HO-1的mRNA水平,以免疫组化方法检测其蛋白表达。结果高脂饮食组TC、TG和LDL明显高于普通饮食组,HDL则低于普通饮食组;高脂饮食组心脏和肺组织中eNOS的mRNA和蛋白水平低于普通饮食组,HO-1的mRNA和蛋白水平高于普通饮食组。结论高脂饲料喂养能使小鼠形成高脂血症,并引起心脏和肺组织中eNOS的表达降低,同时HO-1的表达升高。
基金funded by Key Disciplines Group Construction Project of Pudong Health Bureau of Shanghai(No.PWZxq2014-01)Natural Science Foundation of China(No.81401428)the fund of the Academic Leaders Training Program of Pudong Health Bureau of Shanghai(No.PWRd2013-02)
文摘Objective:To explore the mechanism of Profilin-1 in regulating eNOS/NO pathway and its role in the development of myocardial hypertrophy.Methods:Spontaneously hypertensive rats(SHR) aged 5 weeks were injected with different adenovirus vectors to induce Profilin-1expression knockdown(SHR-I) or over express(SHR-H) or to use as control(SHR-C).All these treatment were compared with Wistar-Kyoto rats(SKY) treated with control adenovirus vectors(WKY-C).The same injection was executed at the sixth week during the experiment of 12 weeks.After experiment,the left ventricular weight-to-heart weight ratio(LVW/HW)and left ventricular long axis(LVLA) were measured.Meanwhile.NO contents in blood and myocardium,Profilin-1,eNOS and Caveolin-3 niRNA and protein levels and phosphorylated eNOS(P-eNOS) protein level in myocardium were determined.Results:Compared with WKY-C group,the SHR-C group was statistically higher in LVW/HW(0.79±0.03).LVLA(11.82±0.58 mm) and Profilin-1 niRNA and prolein level(P<0.05).but lower in NO content[(18.63±6.23) μmol/L| in blood and[(2.71±0.17) μmol/L]in myocardium).eNOS activity and Caveolin-3 expression(P<0.05).The over expressing Profilin-1 led SHR-H group to a higher value of LVW/HW[(0.93±0.03) mm and LVLA(14.17±0.69) mm]in comparison with SHR-C group(P<0.05).and to a lower value of NO content(in myocardium).eNOS activity and Caveolin-3 expression(P<0.05):however,this phenomenon was reversed by the knockdown Profilin-1 expression(SHR-I group).Conclusions:Profilin-1 expression,being negative in regulating Caveolin-3 expression and eNOS/NO pathway activity,promotes the development of myocardial hypertrophy which can be reversed by Profilin-1 silencing.
