孙杰,宋鑫,王健

• 1:上海市健康医学院附属浦东新区人民医院

摘要(Abstract)：

目的观察淫羊藿提取物对骨质疏松骨折大鼠愈合过程Notch信号通路的影响并探讨其机制。方法将雌性SD大鼠分为正常骨折组和骨质疏松组,骨质疏松组去除卵巢3个月后分为骨质疏松骨折组和淫羊藿治疗组。对所有大鼠制备右侧股骨干中段横行骨折模型,淫羊藿治疗组灌胃给予浓度为110 mg/(kg·d)的淫羊藿提取物,其余两组给予等量0.9%氯化钠注射液,连续给予8周,进行骨密度、microCT扫描和病理学检测,并对血清中碱性磷酸酶(ALP)及骨组织中Notch1、骨保护素(OPG)和RANK1蛋白含量的测定。结果骨质疏松骨折组大鼠骨密度、骨体积(BV)、骨体积比(BV/TV)、骨小梁厚度(Tb.Th)、Notch1和OPG显著降低,ALP和RANKL含量增加;淫羊藿治疗8周后,大鼠骨密度、BV、BV/TV、Tb.Th、Notch1和OPG显著增加,ALP和RANKL含量降低(P <0.05);正常骨折组和淫羊藿治疗组骨折部位对合良好,骨重塑规则匀称,骨质疏松骨折组骨折端依然存在较明显的间隙。正常骨折组可见成熟骨小梁形成,处于软骨性骨痂向骨性骨痂转换阶段;骨质疏松性骨折组骨痂邻近原骨小梁细小松散,向骨性骨痂转化过程明显延迟;淫羊藿治疗组形态介于正常骨折组和骨质疏松性骨折组之间。结论淫羊藿提取物对骨质疏松骨折大鼠具有较好的治疗作用,其机制可能与调控Notch信号通路有关。

关键词(KeyWords)： 骨质疏松;淫羊藿提取物;骨折;Notch信号通路;大鼠

Abstract:

Keywords:

基金项目(Foundation): 上海市科学技术委员会科研计划项目(15401530613)

作者(Author): 孙杰,宋鑫,王健

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