摘要
目的 :探讨高血压血管平滑肌细胞 (VSMC)在胰岛素作用下胞内信号转导途径之一丝裂原活化蛋白激酶 (MAPK)的影响 ,及其与VSMC增殖的关系。方法 :选用 6周龄自发性高血压大鼠 (SHR)和WKY大鼠 ,无菌分离主动脉 ,体外纯化培养VSMC至 6～ 8代 ,加胰岛素干预和蛋白激酶C(PKC)抑制剂 ,采用胶内髓磷脂碱性蛋白原位磷酸化法测定VSMC中MAPK活性 ,并用WesternBlot检测VSMC中MAPK的含量 ,[3H]-TdR测定VSMC的DNA合成量。结果 :胰岛素作用后 ,SHR组的DNA合成量显著增加 ,MAPK活性及蛋白含量也显著增加 ,PKC抑制剂可明显降低MAPK活性。结论 :SHR体外培养的VSMC增殖与MAPK活性增加有关 ,胰岛素可影响其活性 ,并且可能存在胰岛素 -PKC
AIM:To explose the possible existing pathway of intracellular signaling transduction in hypertensive induced by insulin in rat vascular smooth muscle cells proliferation which involved mitogen-activated protein kinase. METHODS:Male spontaneously hypertensive rat (SHR) aorta and WKY(6 weeks old) were isolated and then cultured to make the purified vascular smooth muscle cells.6-8th generation of VSMC were interfered with insulin in vitro . MAPK activity was determined by myelin basic protein method and its volume was measured with Western Blot. And [ 3 H]-TdR was used to measure DNA synthesis in VSMC proliferation. RESULTS: After the interfered with insulin the DNA synthesis was increased obviously in SHR group. MAPK activity and its contains in SHR were increased more than the control group. Protein kinase C inhibitor decreased MAPK activity induced by insulin. CONCLUSION:Proliferation of SHR VSMC in vitro was correlated with increased activity of MAPK. Insulin can affect MAPK induced activity. So an insulin-PKC-MAPK axis may exist in hypertensive VSMC.
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2000年第7期596-599,共4页
Chinese Journal of Pathophysiology
基金
国家自然科学基金资助! (No .396 70 32 1)
