›› 2011, Vol. 31 ›› Issue (4): 392-.doi: 10.3969/j.issn.1674-8115.2011.04.002

• 论著(基础研究) • 上一篇    下一篇

蛋白激酶C不同亚型对丙泊酚血管舒张作用的影响

温翔宇1,2, 王 莉1, 崔永耀3, 江 伟1   

  1. 1.上海交通大学附属第六人民医院麻醉科, 上海200233; 2.苏州大学研究生部, 苏州 215006; 3.上海交通大学 基础医学院药理学教研室, 上海 200025
  • 出版日期:2011-04-28 发布日期:2011-04-28
  • 通讯作者: 王 莉, 电子信箱: liwang1118@hotmail.com。
  • 作者简介:温翔宇(1983—), 女, 硕士生;电子信箱: wxyzhjh@126.com。
  • 基金资助:

    国家自然科学基金(30972842);上海市自然科学基金(09ZR1424000)

Effects of different protein kinase C isoforms on vasodilation induced by propofol

WEN Xiang-yu1,2, WANG Li1, CUI Yong-yao3, JIANG Wei1   

  1. 1.Department of Anesthesiology, The Sixth People's Hospital, Shanghai Jiaotong University, Shanghai 200233, China;2.Department Postgraduate, Soochow University, Suzhou 215006, China;3.Department of Pharmacology, Basic Medical College, Shanghai Jiaotong University, Shanghai 200025, China
  • Online:2011-04-28 Published:2011-04-28
  • Supported by:

    National Natural Science Foundation of China, 30972842;Shanghai Municipal Natural Science Foundation, 09ZR1424000

摘要:

目的 探讨丙泊酚的血管舒张作用与蛋白激酶C (PKC)不同亚型间的关系。方法 将SD大鼠胸主动脉环随机分为内皮完整组(n=36)和去内皮组(n=36),每组各分6个亚组:①10 nmol/L Go6976+1×10-6 mol/L去甲肾上腺素(NA)+丙泊酚处理组(n=6);②10 μmol/L Rottlerin+1×10-6 mol/L NA+丙泊酚处理组(n=6);③2 μmol/L PKCε-Pseudo(假底物)+1×10-6 mol/L NA+丙泊酚处理组(n=6);④2 μmol/L PKCθ-Pseudo+1×10-6 mol/L NA+丙泊酚处理组(n=6);⑤2 μmol/L PKCζ-Pseudo+1×10-6 mol/L NA+丙泊酚处理组(n=6);⑥1×10-6 mol/L NA+丙泊酚处理组(对照组,n=6)。PKCα抑制剂Go6976,PKCδ抑制剂Rottlerin,PKCζ、θ和ε假底物孵育血管环30 min后,加1×10-6 mol/L NA收缩血管环达峰值,每15 min加递增浓度的丙泊酚(1×10-6、5×10-6、1×10-5、5×10-5、1×10-4 mol/L),观察血管张力的变化。结果 内皮完整时,Go6976、PKCε假底物和PKCθ假底物减小丙泊酚引起的血管舒张幅度,与内皮完整的对照组相比差异有统计学意义(P<0.05); Rottlerin抑制丙泊酚的血管舒张效应,且在1×10-6~5×10-5 mol/L丙泊酚作用时将舒张效应转为收缩(P<0.05)。去内皮时,Rottlerin、PKCε假底物和PKCθ假底物分别增大相同浓度丙泊酚作用下的血管舒张幅度,与去内皮对照组相比差异有统计学意义(P<0.05);Go6976和PKCζ假底物分别增大1×10-5~1×10-4 mol/L丙泊酚作用下的血管舒张幅度(P<0.05)。结论 PKCα、δ、ε、θ参与了内皮完整时丙泊酚引起的血管舒张。

关键词: 丙泊酚, 胸主动脉, 血管舒张, 蛋白激酶C

Abstract:

Objective To investigate the relationship between propofol-induced vasodilation and different protein kinase C(PKC) isoforms. Methods Vascular rings of SD rats were randomly divided into endothelium-intact group (n=36) and endothelium-denuded group (n=36), and each group was divided into 6 subgroups: ①10 nmol/L Go6976+1×10-6 mol/L norepinephrine (NA)+ propofol group (n=6);②10 μmol/L Rottlerin+1×10-6 mol/L NA+propofol group (n=6);③ 2 μmol/L PKCε-Pseudo+1×10-6 mol/L NA+ propofol group (n=6);④2 μmol/L PKCθ-Pseudo+1×10-6 mol/L NA+ propofol group(n=6);⑤2 μmol/L PKCζ-Pseudo+1×10-6 mol/L NA+ propofol group (n=6);⑥1×10-6 mol/L NA+ propofol group(control group, n=6). PKCα inhibitor Go6976, PKCδ inhibitor Rottlerin, PKCζ-Pseudo, PKCθ-Pseudo and PKCε-Pseudo were used to pretreat isolated thoracic aorta rings for 30 min. Then 1×10-6 mol/L NA evoked a steady maximal vasoconstriction, propofol was added in progressively increasing cumulative concentrations at a 15 min interval (1×10-6, 5×10-6, 1×10-5, 5×10-5 and 1×10-4 mol/L), and the changes of vascular tone were observed. Results In endothelium-intact group, compared with endothelium-intact group, Go6976, PKCε-Pseudo and PKCθ-Pseudo inhibited propofol-induced vasodilation (P<0.05). Rottlerin also inhibited propofol-induced vasodilation, and even reversed the effect (1×10-6 to 5×10-5 mol/L propofol)(P<0.05). In endothelium-denuded group, compared with endotheliumdenuded control group, Rottlerin, PKCθ-Pseudo and PKCε-Pseudo enhanced propofol-induced vasodilation (P<0.05), and Go6976 and PKCζ-Pseudo enhanced vasodilation induced by 1×10-5 to 1×10-4 mol/L propofol (P<0.05). Conclusion PKCα, PKCδ, PKCε and PKCθ involve in propofol-induced vasodilation in intact endothelium.

Key words: propofol, thoracic aorta, vasodilatation, protein kinase C