中药补肾活骨方对去势骨质疏松大鼠骨代谢的影响

背景：中药补肾活骨方可有效防治骨质疏松症,但其具体的药理学机制仍不是很清楚。25-羟基维生素D3和1,25-二羟基维生素D3是调节骨吸收与骨形成的重要的偶联因子。 目的：观察补肾中药对去势骨质疏松大鼠骨密度、骨生物力学、血清及肝肾组织中25-羟基维生素D3和1,25-二羟基维生素D3水平的影响。 方法：健康雌性SD大鼠108只随机等分为假手术组、模型组和治疗组。后2组摘除双侧卵巢,导致雌激素缺失,从而诱导骨质疏松症模型。治疗组大鼠造模后以中药补肾活骨方2 mL灌胃,2次/d。 结果与结论：与模型组相比,治疗组股骨头骨密度明显提高(P < 0.05),最大应力和最大负荷指数明显增强(P < 0.05),血液、肝脏和肾脏组织中25-羟基维生素D3和1,25 二羟基维生素D3水平明显提高(P < 0.05);且接近于假手术组(P < 0.05)。提示补肾中药在雌激素缺失早期即可在分子水平上调节25-羟基维生素D3和1,25-二羟基维生素D3的表达水平,激活骨代谢提高骨密度增强骨质量达到预防骨质疏松的作用。关键词：补肾活骨方;1,25-二羟基维生素D3;骨密度;骨生物力学;骨质疏松症;骨代谢 doi:10.3969/j.issn.1673-8225.2012.15.006 中图分类号: R318  文献标识码: A  

Effects of Bushen Huogu decoction on bone metabolism of ovariectomized osteoporotic rats

BACKGROUND: Bushen Huogu decoction can effectively prevent and treat osteoporosis, but the concrete mechanism of pharmacology is still not clear. 25-hydroxy vitamin D3 and 1, 25-dihydroxyvitamin D3 are important coupling factors, which can regulate bone resorption and formation. OBJECTIVE: To investigate the curative effects of Bushen Huogu decoction on the bone mineral density, bone biomechanics, and level of 25-hydroxy vitamin D3 and 1, 25-dihydroxyvitamin D3 in blood serum, liver and kidney in the ovariectomized osteoporotic rats. METHODS: Totally 108 healthy female Sprague-Dawley rats were randomly divided into model group, sham-operated group, and treatment group. All rats had been ovariectomized to induce estrogen absence and further establish osteoporotic models, except those in sham-operated group. Treatment group of rats were intragastrically administrated with 2 mL Bushen Huogu decoction, twice a day. RESULTS AND CONCLUSION: Compared with model group, the bone mineral density in the rat femur was significantly increased in the treatment group (P < 0.05), the index of maximal stress and maximal loading of the femoral head were also increased (P < 0.05). The concentration of 25-hydroxy vitamin D3 and 1, 25-dihydroxyvitamin D3 in blood serum, liver and kidney were significant higher in the treatment group than those in the model group, and the levels were similar with those in sham-operated group (P > 0.05). In the early period of estrogenic hormone absence, the Chinese kidney-tonifying drugs could activate bone metabolism, raise bone mineral density and reinforce quality of bone through up-regulating expression of 25-hydroxy vitamin D3 and 1, 25-dihydroxyvitamin D3.