松脂醇二葡萄糖苷激活Wnt/β-catenin信号通路保护成骨细胞

被引:2
|
作者
余鹏 [1 ]
孟东方 [2 ]
李慧英 [2 ]
刘洪飞 [3 ]
贺自克 [4 ]
机构
[1] 河南中医药大学骨伤学院
[2] 河南中医药大学第一附属医院
[3] 辽宁中医药大学
[4] 河南省中医院
关键词
松脂醇二葡萄糖苷; 激素性股骨头坏死; 成骨细胞; 细胞活性; Wnt/β-catenin信号通路; 细胞增殖; 细胞凋亡;
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学科分类号
摘要
背景:松脂醇二葡萄糖苷可以促进骨形成与骨基质的合成,加速骨组织修复,但其对成骨细胞的影响和作用机制仍需进一步探索。目的:基于Wnt/β-catenin信号通路探讨松脂醇二葡萄糖苷对地塞米松干预成骨细胞的影响和作用机制。方法:设置不同浓度的地塞米松组和松脂醇二葡萄糖苷组对成骨细胞干预24 h,筛选最佳干预浓度;使用地塞米松、松脂醇二葡萄糖苷和Wnt/β-catenin抑制剂XAV-939对成骨细胞进行干预,设置对照组、地塞米松组、抑制剂组、松脂醇二葡萄糖苷组、松脂醇二葡萄糖苷+抑制剂组。CCK-8法检测细胞活性,检测各组细胞碱性磷酸酶和半胱氨酸天冬氨酸蛋白酶3/7酶活性,Annexin V/PI染色与EdU法检测细胞凋亡与增殖情况,Real-Time qPCR检测Wnt3a、β-catenin、c-myc、骨钙素、Ⅰ型胶原蛋白的mRNA表达水平,Western Blot检测Wnt3a、β-catenin、c-myc、骨钙素、Ⅰ型胶原蛋白的蛋白表达水平。结果与结论:(1)地塞米松和松脂醇二葡萄糖苷干预成骨细胞24 h后,发现浓度为10μmol/L的地塞米松细胞抑制率为实验最佳干预浓度;松脂醇二葡萄糖苷浓度在100μmol/L时,细胞增殖最为明显;(2)与地塞米松组比较,松脂醇二葡萄糖苷组的碱性磷酸酶活性显著增强(P <0.05),半胱氨酸天冬氨酸蛋白酶3/7酶活性显著降低(P <0.05);Annexin V/PI染色和EdU法细胞增殖检测结果表明,松脂醇二葡萄糖苷可抑制地塞米松干预后成骨细胞的凋亡,促进成骨细胞增殖;(3)与地塞米松组和抑制剂组比较,松脂醇二葡萄糖苷组和松脂醇二葡萄糖苷+抑制剂组中Wnt3a、β-catenin、c-myc、骨钙素、Ⅰ型胶原蛋白mRNA和蛋白表达水平均显著升高(P <0.05);(4)结果表明,松脂醇二葡萄糖苷可以抑制地塞米松干预后的成骨细胞凋亡,通过激活Wnt/β-catenin信号通路来保护成骨细胞活性,促进成骨细胞增殖,可能发挥延缓激素性股骨头坏死的作用。
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页码:339 / 346
页数:8
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