复方司坦唑醇抗泼尼松性大鼠骨质疏松作用研究

Effects of compound stanozolol in prednisone-induced osteoporosis rats

目的 探讨大鼠长期超生理剂量应用糖皮质激素引起的骨质疏松症特点 ,同时观察复方司坦唑醇的防治作用。方法 2 4只 4月龄SPF级SD♂大鼠随机分为 3组 ,1组为溶剂对照组 (NS组 ) ,2组为泼尼松组 (GC组 ) ,3组为复方司坦唑醇治疗组 (CS组 ) ,所有动物予相应的处理因素进行灌胃 ,每天 1次 ,连续 12wk。实验结束后通过观察胫骨的组织形态学参数变化、骨质含量变化和骨的物理生长指标来判断泼尼松长期超生理剂量应用对大鼠骨代谢的影响以及观察复方司坦唑醇对其防治作用。结果 与NS组比较 ,大鼠予泼尼松灌喂 12wk后骨量显著丢失 ,骨生长受到抑制 (P <0 0 1) ,单位骨重量中Hyp含量显著降低 (P <0 0 5 ) ,但单位骨重量中Ca2 + 含量变化不显著 (P >0 0 5 )。复方司坦唑醇制剂可有效增加泼尼松大鼠骨量 (P <0 0 1)以及对抗泼尼松的骨生长抑制作用。结论 泼尼松灌喂大鼠 12wk后 ,可造成骨质明显丢失 ,其中以骨的HyP丢失显著 。

Aim To study the characteristics of osteoporosis induced by long-term administration of prednisone, and investigate the preventive effects of compound stanozolol (CS) on the adverse reactions in male rats. Methods Twenty-four four-month-old male Sprague-Dawley rats were randomly divided into 3 groups with 8 rats per group. Group 1 was control (NS group), other groups were oral gavages prednisone (2.7 mg·kg -1·d -1) first, and then plus vehicle (GC group) or plus CS (combination of Stanozolol 0.5 mg·kg -1·d -1 + Calciofon 0.5 g·kg -1·d -1 + Vitamin D 3 250 U·kg -1·d -1), once a day for 12 weeks. At the experimental endpoint, animals were drawn blood from right ventricle under anesthesia. The tibia, ulna and thighbone were collected to test for parameters related to bone.The undecalcified longitudinal proximal tibia metaphyseal sections were cut and stained with Masson-Goldner's Trichrome (5-μm thickness) for osteoclasts analysis, unstained sections (8-μm thickness) for the cancellous bone histomorphometric and fluorochrome labeling analysis. The measured parameters were used to calculate the percent trabecular area (Tb.Ar%), trabecular thickness (Tb.Th), trabecular number (Tb.N), trabecular separation (Tb.Sp), percent labeled perimeter (L.Pm%), Mineral apposition rate (MRA), bone formation rate (BFR/TV, BFR/BV, BFR/BS), unit area osteoclast number (Oc.N/BV) and Percent osteoclast number surface perimeter (OcP/BS). The desiccant left ulnar was dissolved in hydrochloric acid to test the content of Ca 2+ and hydroxyproline. Length and width of the thigh bone were tested to observe the instance of bone growing. Results Compared with NS group, bone weight, contents of bone hydroxyproline and Ca 2+decreased remarkably in GC group and the bone histomorphometric parameters also showed bone lose significantly.The effects of CS in prednisone rats showed that CS prevented bone loss effectively.Conclusions Bone loss occured in four-month-old male Sprague-Dawley rats after prednisone-treated for 12 weeks. CS could prevent bone loss effectively by inhibiting bone resorption and advancing bone formation.