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中国临床药理学与治疗学 ›› 2006, Vol. 11 ›› Issue (6): 634-639.

• 研究原著 • 上一篇    下一篇

拉马克啉对内皮素-1诱导的大鼠血管平滑肌细胞增殖及蛋白激酶C表达的作用

黄文新, 莫碧文, 阳耀忠, 房春生1, 夏中华, 潘迪华, 徐彤彤, 莫新玲   

  1. 桂林医学院附属医院心血管内科, 桂林 541001, 广西;
    1吉林大学环境与资源学院, 环境科学系, 长春 130012, 吉林
  • 收稿日期:2006-03-30 修回日期:2006-04-16 出版日期:2006-06-26 发布日期:2020-12-04
  • 作者简介:黄文新,男,硕士,副主任医师,研究方向:高血压基础及临床研究。Tel:13978343363 E-mail:whuang66@glmc.edu.cn
  • 基金资助:
    广西科学研究与技术开发计划资助项目(桂科攻No0322025-11)

Effect of levcromakalim on ET-1 induced proliferation and expression of protein kinase C in vascular smooth muscle cells

HUANG Wen-xin, MO Bi-wen, YANG Yao-zhong, FANG Chun-sheng1, XIA Zhong-hua, PAN Di-hua, XU Tong-tong, MO Xin-ling   

  1. Department of Cardiology, Hospital affiliated Guilin Medical College, Guilin 541001, Guangxi, China;
    1Jilin University, Department of environmentd science college of Envronment and Resources, Changchun 130012, Jilin, China
  • Received:2006-03-30 Revised:2006-04-16 Online:2006-06-26 Published:2020-12-04

摘要: 目的: 探讨拉马克啉(levcromakalim) 对内皮素-1(ET-1) 诱导的大鼠血管平滑肌细胞增殖及蛋白激酶C(protein kinase C, PKC) 表达的影响。方法: 体外培养Wistar 大鼠主动脉血管平滑肌细胞(vascular smooth muscle cell, VSMCs), 用ET-1 诱导其增殖, 用不同浓度拉马克啉共培养, MTT 法评价VSMCs 增殖情况, 3H-TdR 检测DNA 合成, 流式细胞术检测VSMCs 凋亡, 逆转录聚合酶链式反应(RT-PCR),Western blot 检测PKCαmRNA 及蛋白表达。结果: 拉马克啉对ET-1 所致VSMCs 增殖有显著抑制作用,随浓度增加, 其MTT 活性细胞含量和3H-TdR 掺入量都明显减少(P<0.05);拉马克啉呈剂量依赖性地增加G0 G1 期VSMCs(P<0.05), 促使VSMCs 凋亡增多(P<0.05);拉马克啉抑制VSMCs 内PKCαmRNA 及蛋白表达。结论: 拉马克啉抑制ET-1 诱导的VSMCs 增殖作用, 可能的机制是通过下调VSMCs内PKCα表达水平而影响VSMCs 增殖和凋亡。

关键词: 拉马克啉, 血管平滑肌细胞, 增殖, 蛋白激酶C

Abstract: AIM: To observe the effect of levcromakalim (Lev) on endthelin-1(ET-1) induced proliferation and the expression of protein kinase C (PKC) in cultured rat vascular smooth muscle cells (VSMCs).Methods: VSMCs were isolated from rat aorta and were cultured with different concentrations of Lev in vitro after stimulated to proliferation by ET-1(10-8mol·L-1). Vitality of VSMCs was detected by MTT;DNA replication was evaluated by 3H-TdR method.Flow cytometry was used to analyze cell cycle and apoptosis.The expression of PKCαprotein and mRNA were determined by Western blot and reverse transcription-polymerase chain reaction (RT-PCR).Results: Vitality of VSMCs and 3H-TdR intermingle rate were decreased (P<0.05) in a dose dependent manner which indicated Lev inhibited VSMCs proliferation by inducing ET-1.Levcromakalin increased the ratio of VSMCs apoptosis (P<0.01).The cell cycle was blocked at G0 G1 phase by Lev in a dose dependent manner (P<0.05).Levcromakalim decreased the expression of PKCαprotein and mRNA in VSMCs (P<0.05).Conclusion: Levcromakalim inhibits VSMCs proliferation by inducing ET-1 through reducing the expression PKCα.

Key words: levcromakalim, vascular smooth muscle cells, proliferation, protein kinase C

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