The role of （pro）rennin receptor （PRR） in cardiomyocytes of a heart failure （HF） rat model was studied. Spontaneously hypertensive rats （SHR） with HF （SHR-HF） or not were identified by two-dimensional （2-D...The role of （pro）rennin receptor （PRR） in cardiomyocytes of a heart failure （HF） rat model was studied. Spontaneously hypertensive rats （SHR） with HF （SHR-HF） or not were identified by two-dimensional （2-D） ultrasound. Age-matched Wistar Kyoto normotensive （WKY） rats were used as controls. PRR short hair RNA （sh-RNA） was injected into the heart of SHR-HF. Simultaneously SHR and controls received the same shRNA injection into the heart. Scramble shRNA was injected into the heart as controls. The expression of PRR mRNA and protein in cardiomyocytes was detected by using real-time PCR and Western blotting respectively. The heart function was evaluated by 2-D ultrasound, including eject fraction （EF%）, fractional shortening （FS%）, left ventricle thickness （LV）, and in- ter-ventricular septal thickness （IVS）. The number of apoptotie cardiomyocytes was counted by using flow cytometry. The results showed that the mRNA and protein expression levels of PRR were signifi- cantly higher in cardiomyocytes of SHR-HF group than in those of SHR group or control group. The apoptosis of myocytes in SHR-HF group was increased as compared with SHR group or control group. After knock-down of PRR with shRNA in SHR-HF group, the apoptosis of myocytes was reduced, re- sulting in the improved heart function. It was suggested that down-regulation of PRR might protect the heart from development of HF in SHR-HF by inhibiting the apoptosis of cardiomyocytes.展开更多
Cardiovascular disease is the most important factor that affect the lifetime of uremia patients. Recently, scientists pay closer attention to study the mechanism of cardiac injury in uremia patients. In this article, ...Cardiovascular disease is the most important factor that affect the lifetime of uremia patients. Recently, scientists pay closer attention to study the mechanism of cardiac injury in uremia patients. In this article, we will make an overview on mechanism of cardiac injure caused by uremia toxin, secondary hyperparathyroidism, calcium-phosphorus metabolic disorder, rennin-angiotensin-aldosterone system.展开更多
背景醛固酮过多是导致心肌肥厚、心力衰竭和肾功能受损的重要危险因素,导致心脏、肾脏等高血压靶器官损害更为严重。除原醛症外,临床发现部分原发性高血压患者的血浆肾素活性及血醛固酮水平升高,但目前关于原发性高血压患者血压水平与...背景醛固酮过多是导致心肌肥厚、心力衰竭和肾功能受损的重要危险因素,导致心脏、肾脏等高血压靶器官损害更为严重。除原醛症外,临床发现部分原发性高血压患者的血浆肾素活性及血醛固酮水平升高,但目前关于原发性高血压患者血压水平与血浆肾素活性、醛固酮水平的相关性研究偏少,研究结论也不一致。目的分析原发性高血压患者血压水平与肾素-醛固酮系统活性的相关性,探讨伴高醛固酮血症的原发性高血压患者可能的病理生理机制,为此类患者的早期治疗、延缓高血压靶器官损害提供理论依据。方法检索Pub Med、EMBase、中国知网、维普网和万方数据知识服务平台,检索时限为建库至2020年1月。2名研究者根据文献纳入和排除标准独立筛选文献、提取资料并使用纽卡斯尔-渥太华质量评估量表(NOS)进行质量评价。采用Rev Man 5.2软件进行Meta分析。结果以中国高血压人群为研究对象,共纳入16篇文献、原发性高血压患者1885例、健康对照者1438例。NOS偏倚风险评价结果显示16篇文献评分均在5分以上。Meta分析结果显示:试验组的血浆肾素活性[MD=0.40,95%CI(0.04,0.76)]、血浆醛固酮水平[MD=60.03,95%CI(22.28,97.79)]高于对照组(P<0.05)。但试验组的卧位肾素活性[MD=-1.27,95%CI(-1.37,-1.16)]和立位肾素活性[MD=-1.67,95%CI(-1.88,-1.46)]均低于对照组(P<0.05)。试验组卧位醛固酮水平[MD=0.07,95%CI(0.06,0.09)]、立位醛固酮水平[MD=0.22,95%CI(0.05,0.39)]高于对照组(P<0.05)。结论(1)原发性高血压患者的血浆肾素活性、醛固酮水平与血压正常者相比是有差异的。无论是卧位采血还是立位采血,原发性高血压患者的血浆肾素水平是低于血压正常者的,而醛固酮水平是高于血压正常者的。(2)在部分原发性高血压患者中,肾素活性与醛固酮水平变化方向不一致,提示原发性高血压患者的高醛固酮血症系非肾素依赖性的不适当醛固酮水平增高。在降压药物的选择中,应包含盐皮质激素受体拮抗剂。展开更多
文摘The role of （pro）rennin receptor （PRR） in cardiomyocytes of a heart failure （HF） rat model was studied. Spontaneously hypertensive rats （SHR） with HF （SHR-HF） or not were identified by two-dimensional （2-D） ultrasound. Age-matched Wistar Kyoto normotensive （WKY） rats were used as controls. PRR short hair RNA （sh-RNA） was injected into the heart of SHR-HF. Simultaneously SHR and controls received the same shRNA injection into the heart. Scramble shRNA was injected into the heart as controls. The expression of PRR mRNA and protein in cardiomyocytes was detected by using real-time PCR and Western blotting respectively. The heart function was evaluated by 2-D ultrasound, including eject fraction （EF%）, fractional shortening （FS%）, left ventricle thickness （LV）, and in- ter-ventricular septal thickness （IVS）. The number of apoptotie cardiomyocytes was counted by using flow cytometry. The results showed that the mRNA and protein expression levels of PRR were signifi- cantly higher in cardiomyocytes of SHR-HF group than in those of SHR group or control group. The apoptosis of myocytes in SHR-HF group was increased as compared with SHR group or control group. After knock-down of PRR with shRNA in SHR-HF group, the apoptosis of myocytes was reduced, re- sulting in the improved heart function. It was suggested that down-regulation of PRR might protect the heart from development of HF in SHR-HF by inhibiting the apoptosis of cardiomyocytes.
文摘Cardiovascular disease is the most important factor that affect the lifetime of uremia patients. Recently, scientists pay closer attention to study the mechanism of cardiac injury in uremia patients. In this article, we will make an overview on mechanism of cardiac injure caused by uremia toxin, secondary hyperparathyroidism, calcium-phosphorus metabolic disorder, rennin-angiotensin-aldosterone system.
文摘背景醛固酮过多是导致心肌肥厚、心力衰竭和肾功能受损的重要危险因素,导致心脏、肾脏等高血压靶器官损害更为严重。除原醛症外,临床发现部分原发性高血压患者的血浆肾素活性及血醛固酮水平升高,但目前关于原发性高血压患者血压水平与血浆肾素活性、醛固酮水平的相关性研究偏少,研究结论也不一致。目的分析原发性高血压患者血压水平与肾素-醛固酮系统活性的相关性,探讨伴高醛固酮血症的原发性高血压患者可能的病理生理机制,为此类患者的早期治疗、延缓高血压靶器官损害提供理论依据。方法检索Pub Med、EMBase、中国知网、维普网和万方数据知识服务平台,检索时限为建库至2020年1月。2名研究者根据文献纳入和排除标准独立筛选文献、提取资料并使用纽卡斯尔-渥太华质量评估量表(NOS)进行质量评价。采用Rev Man 5.2软件进行Meta分析。结果以中国高血压人群为研究对象,共纳入16篇文献、原发性高血压患者1885例、健康对照者1438例。NOS偏倚风险评价结果显示16篇文献评分均在5分以上。Meta分析结果显示:试验组的血浆肾素活性[MD=0.40,95%CI(0.04,0.76)]、血浆醛固酮水平[MD=60.03,95%CI(22.28,97.79)]高于对照组(P<0.05)。但试验组的卧位肾素活性[MD=-1.27,95%CI(-1.37,-1.16)]和立位肾素活性[MD=-1.67,95%CI(-1.88,-1.46)]均低于对照组(P<0.05)。试验组卧位醛固酮水平[MD=0.07,95%CI(0.06,0.09)]、立位醛固酮水平[MD=0.22,95%CI(0.05,0.39)]高于对照组(P<0.05)。结论(1)原发性高血压患者的血浆肾素活性、醛固酮水平与血压正常者相比是有差异的。无论是卧位采血还是立位采血,原发性高血压患者的血浆肾素水平是低于血压正常者的,而醛固酮水平是高于血压正常者的。(2)在部分原发性高血压患者中,肾素活性与醛固酮水平变化方向不一致,提示原发性高血压患者的高醛固酮血症系非肾素依赖性的不适当醛固酮水平增高。在降压药物的选择中,应包含盐皮质激素受体拮抗剂。
