p38MAPK与新生大鼠成骨细胞的增殖、分化和凋亡

被引:15
作者
王晓晖 [1 ]
汤旭磊 [2 ]
机构
[1] 甘肃省中医院内分泌科
[2] 兰州大学第一医院内分泌科
关键词
p38MAPK; 増殖; 分化; 凋亡; 成骨细胞;
D O I
暂无
中图分类号
R363 [病理生理学];
学科分类号
100103 [病原生物学];
摘要
背景:p38MAPK 是 MAPK 信号转导途径的通道之一。但是,p38MAPK 如何参与成骨细胞增殖、分化的调控,是否与成骨细胞的凋亡有关,目前尚未见相关文献报道。目的:观察 p38MAPK 对新生大鼠成骨细胞增殖、分化和凋亡的影响。设计、时间及地点:单一样本观察,细胞学体外对比观察,于 2007-05/2008-03 在解放军兰州军区总院骨科研究所细胞培养室完成。材料:新生 24 h SD 大鼠 9 只用于分离成骨细胞;SB203580(p38MAPK 的阻断剂)为 Sigma 公司产品。方法:取新生 SD 大鼠头盖骨成骨细胞。药物刺激组分别加入不同浓度(1×10-6,1×10-7,1×10-8 mol/L )的 17β-雌二醇、葛根素;含阻断剂组提前 30 min 添加 10 μmol/LSB203580 阻断信号转导通路,再加药物;设空白对照组。主要观察指标:作用 72 h 后用四甲基偶氮唑盐法与对硝基苯磷酸法测定细胞的增殖能力和碱性磷酸酶活性,Annexin V-FITC/PI 双标记流式细胞仪分析细胞早期凋亡。结果:加入 17β-雌二醇或葛根素药物后,成骨细胞的增殖、分化明显增强,与空白对照组比较差异有显著性意义(P < 0.05);阻断 p38MAPK 信号转导通路后,细胞增殖未受明显抑制(P > 0.05);分化受到明显抑制,与未阻断组比较差异具有非常显著性意义(P < 0.01)。流式细胞仪分析结果显示,与对照组相比,药物组细胞早期凋亡率明显降低(P < 0.05);与药物刺激组相比,含阻断剂组细胞早期凋亡率无明显变化(P > 0.05)。结论:17β-雌二醇、葛根素能促进成骨细胞的增殖和分化并抑制其凋亡;p38MAPK 在成骨细胞分化过程中发挥重要作用,对成骨细胞的增殖、凋亡无明显影响。
引用
收藏
页码:7226 / 7230
页数:5
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