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中国临床药理学与治疗学 ›› 2011, Vol. 16 ›› Issue (3): 249-253.

• 基础研究 • 上一篇    下一篇

降钙素基因相关肽对大鼠血管平滑肌细胞CDK2和Cyclin E的影响

邓水秀1, 曾泗宇2, 任俊芳2, 郑元斌2, 廖端芳2, 秦旭平2   

  1. 1湖南环境生物职业技术学院药学系, 衡阳 421005,湖南;
    2南华大学药物药理研究所, 衡阳 421001,湖南
  • 收稿日期:2009-12-21 修回日期:2010-03-05 出版日期:2011-03-26 发布日期:2011-05-18
  • 通讯作者: 秦旭平,男,教授,硕士生导师,研究方向:心血管重构的药物防治。Tel: 0734-8281587 E-mail: qinxp333@hotmail.com
  • 作者简介:邓水秀,女,硕士,助教,研究方向:心血管药理学。Tel: 0734-8198721 E-mail: tina20040152@yahoo.com.cn廖端芳,男,教授,博士生导师,研究方向:心血管药理学。
  • 基金资助:
    国家自然科学基金(30572192)和湖南省自然科学基金(05JJ30042)资助课题

Effect of CGRP on the CDK2 and Cyclin E of rat vascular smooth muscle cell

DENG Shui-xiu1, ZENG Si-yu2, REN Jun-fang2, ZHENG Yuan-bin2, LIAO Duan-fang2, QIN Xu-ping2   

  1. 1Department of Pharmacy, Hunan Environment-Biological Polytechnic College, Hengyang 421005, Hunan, China;
    2Institute of Pharmacy and Pharmacology, University of South China, Hengyang 421001, Hunan, China
  • Received:2009-12-21 Revised:2010-03-05 Online:2011-03-26 Published:2011-05-18

摘要: 目的: 研究降钙素基因相关肽(CGRP)对大鼠血管平滑肌细胞中细胞周期蛋白依赖性激酶2(cyclin-dependent kinase 2,CDK2)和细胞周期蛋白E(Cyclin E)的影响,为阐明CGRP抑制血管平滑肌细胞增殖的细胞周期机制提供实验依据。方法: 培养大鼠胸主动脉血管平滑肌细胞,分别用CGRP或/和10%FBS处理细胞。噻唑蓝比色法(MTT)观察CGRP对10%FBS诱导大鼠血管平滑肌细胞增殖的影响;流式细胞术分析细胞周期;Western blot检测CDK2和Cyclin E的表达。结果: CGRP能抑制10%FBS诱导的血管平滑肌细胞增殖,升高G0/G1期细胞百分比,降低S+G2+M期细胞百分比,抑制细胞内CDK2和Cyclin E表达。结论: CGRP能通过阻滞细胞周期由G0/G1期进入S期而抑制血管平滑肌细胞增殖,其作用机制可能与降低CDK2和Cyclin E表达有关。

关键词: 降钙素基因相关肽, 血管平滑肌细胞, 细胞周期, 细胞周期蛋依赖性激酶, 细胞周期蛋白E

Abstract: AIM: To study the effect of calcitonin gene-related peptide (CGRP) on cyclin-dependent kinase 2(CDK2) and Cyclin E of vascular smooth muscle cell (VSMC), and to elute the mechanism of inhibitory effect of CGRP on proliferation of VSMC in cell cycles. METHODS: VSMC were prepared from thoracic aortas of male Sprague-Dawley rat by explanting method. The cell viability and cell cycle were determined by MTT and Flow Cytometry, respectively. Western Blot was used to observe expressions of CDK2 and Cyclin E of VSMC. RESULTS: Pretreatment of VSMC with CGRP significantly inhibited cells viability, decreased the proportion of S phase and increased ratio of G0/G1 that were induced by 10% FBS, simultaneously, CGRP down-regulated the expressions of CDK2 and Cyclin E when cultured cells with 10% FBS at 12, 24 and 48 hours.CONCLUSION: CGRP could inhibit the cell cycle of VSMC G0/G1 phase to S phase transition, by which the mechanism maybe involved in the decrease expressions of CDK2 and Cyclin E.

Key words: CGRP, Vascular smooth muscle cell, Cell cycle, CDK2, Cyclin E

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