目的:研究不同年龄的自发性高血压大鼠(spon taneously hypertens ive rat,SHR)心室肌组织中细胞外调节激酶(ex trace llu lar s igna l-regu lated k inases,ERK s)的表达及活化与心肌肥厚的关系。方法:选择W istar K yoto(W KY)大鼠...目的:研究不同年龄的自发性高血压大鼠(spon taneously hypertens ive rat,SHR)心室肌组织中细胞外调节激酶(ex trace llu lar s igna l-regu lated k inases,ERK s)的表达及活化与心肌肥厚的关系。方法:选择W istar K yoto(W KY)大鼠作对照,SHR和W KY大鼠按年龄分为5周、8周、14周和24周各4组,以左心室质量与体重的比值反映心肌肥厚的程度;采用W estern b lot方法测定大鼠左心室心肌组织中基础表达ERK(basa l ERK,b-ERK)和磷酸化ERK(phosphory lated-ERK,p-ERK)的水平。结果:①与相同周龄W KY大鼠比较,SHR自8周龄起血压明显升高(P<0.001),14周后心肌肥厚指数明显增加(P<0.01)。②各年龄组SHR与相同周龄W KY大鼠b-ERK水平比较均无明显差异(P>0.05)。③5周龄SHR p-ERK水平与同龄W KY大鼠无差异,8到24周SHR大鼠p-ERK水平明显高于同龄W KY大鼠(P<0.01)。④心肌肥厚指数与b-ERK量无明显相关性,与p-ERK量呈正相关。结论:在SHR大鼠心肌肥厚形成中,心肌组织b-ERK没有增加,p-ERK水平增高,ERK活性增加参与高血压心肌肥厚过程。展开更多
Myocardial hypertrophy is an independent risk factor for cardiac events. Mitogen-activated protein kinases (MAPK), including extracellular signal-regulated kinases, C-jun N-terminal kinases and P38-MAPK, are the commo...Myocardial hypertrophy is an independent risk factor for cardiac events. Mitogen-activated protein kinases (MAPK), including extracellular signal-regulated kinases, C-jun N-terminal kinases and P38-MAPK, are the common intracellular pathway of transducing hypertrophic signs. All three MAPK subfamilies play an important role in development of myocardial hypertrophy.展开更多
文摘Myocardial hypertrophy is an independent risk factor for cardiac events. Mitogen-activated protein kinases (MAPK), including extracellular signal-regulated kinases, C-jun N-terminal kinases and P38-MAPK, are the common intracellular pathway of transducing hypertrophic signs. All three MAPK subfamilies play an important role in development of myocardial hypertrophy.
