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EFFECTS OF PRAERUPTORIN C ON CELL HYPERTROPHY, INTRACELLULAR [Ca2+]i, NITRIC OXIDE AND SIGNAL TRANSDUCTION IN ISOLATED HYPERTROPHIED RAT SMOOTH MUSCLE CELLS INDUCED BY ANGIOTENSIN II
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- Author:
- No author available
- Journal Title:
- ACTA PHARMACEUTICA SINICA
- Issue:
- 1
- DOI:
- 10.3321/j.issn:0513-4870.2002.01.002
- Key Word:
- 前胡丙素;血管平滑肌;细胞内游离钙;一氧化氮
Abstract： 目的前胡丙素(Pra-C)对血管紧张素II(Ang II)致离体培养大鼠血管平滑肌细胞(SMCs)肥厚模型胞内游离钙浓度、NO含量和信号转导的影响.方法以Ang II刺激SMCs形成肥厚模型,用倒置显微镜测定SMCs面积;用Fura-2/AM测定单细胞内[Ca2+]i,Griess法测定NO含量;在PMA和ST(PKC激动剂及抑制剂)、PTX(Gi蛋白敏感毒素)作用下观察Pra-C对KCl和NE所致胞内[Ca2+]i浓度变化的影响.结果 Pra-C组SMCs细胞面积较肥厚组减小39.01%,并接近正常细胞水平;NO含量明显增加;胞内[Ca2+]i对KCl和NE激动的反应明显低于肥厚组.PMA使肥厚SMCs[Ca2+]i升高,而ST及PTX则使之降低,Pra-C均使之恢复正常.结论 Pra-C抑制Ang II致体外培养细胞SMCs肥厚,改善肥厚细胞因PKC和Gi蛋白的信号转导改变所致的[Ca2+]i改变.
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