生育三烯酚通过激活Wnt/β-catenin信号减少激素诱导骨质疏松大鼠骨量流失

被引:8
作者
陈光华
黄贵芝
林瀚
吴新诱
谭小艳
陈周韬
机构
[1] 广东医科大学附属医院
关键词
骨生物力学; 糖皮质激素性骨质疏松; 生育三烯酚; Micro-CT;
D O I
暂无
中图分类号
R580 []; R-332 [医用实验动物学];
学科分类号
100402 [劳动卫生与环境卫生学];
摘要
目的观察生育三烯酚对糖皮质激素性骨质疏松(glucocorticoid-induced osteoporosis,GIOP)大鼠骨量影响并探索可能的机制。方法将30只12周龄雄性SD大鼠随机分为3组:对照组(n=10)、地塞米松组(DEX,n=10)及地塞米松+生育三烯酚组(DEX+TTS,n=10)对应给予DEX及TTS干预。12周后取双侧股骨进行微型计算机断层扫描(Micro-CT)和骨生物力学检测。同时检测抗酒石酸酸性磷酸酶(TRACP)、Ⅰ型胶原交联羧基末端肽(CTX-I)、碱性磷酸酶(ALP)和骨钙素(OC)。蛋白印迹检测各组BMP-2、OPG及RANKL蛋白表达改变。结果 DEX组大鼠的骨密度(bone mineral density,BMD)、骨显微结构和骨生物力学指标均明显低于对照组(P<0.05)。骨吸收指标(TRACP和CTX-I)升高,骨形成指标(ALP和OC)降低。TTS治疗后骨密度、骨显微结构、骨生物力学指标均有明显改善。与DEX相比,DEX+TTS组的TRACP和CTX-I显著降低,ALP和OC显著升高。蛋白印迹结果表明DEX组的BMP-2和OPG明显降低,而RANKL水平显著上升; TTS治疗后BMP-2和OPG明显上升,而RANKL水平显著降低。结论 TTS可以通过降低骨吸收和促进骨形成及激活Wnt/β-catenin信号来提高GIOP大鼠骨密度、骨微观结构和骨强度。
引用
收藏
页码:1618 / 1622+1684 +1684
页数:6
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