实验动物科学 ›› 2018, Vol. 35 ›› Issue (05): 30-.

• 研究报告 • 上一篇    下一篇

糖皮质激素性骨质疏松模型大鼠在性别上的差异性研究

  

  1. 广东省医学实验动物中心,佛山528248
  • 出版日期:2018-10-28 发布日期:2020-08-28

Effect of Gender on G lucocorticoid-induced Osteoporosis Rat M odel

  • Online:2018-10-28 Published:2020-08-28

摘要: 目的 研究对糖皮质激素性骨质疏松模型大鼠在性别上的差异性,为该模型的应用提供背景数据。方法 骨质疏松组雌性大鼠和雄性大鼠在第1天~第21天按2.5 mg/kg体质量,第22天~第63天按1 mg/kg体质量肌肉注射地塞米松磷酸钠注射液,正常对照组大鼠肌肉注射等体积的氯化钠注射液,1次/2 d,持续9周。末次注射 后1 h所有动物麻醉取血和组织,血清检测ALP、Ca、P、维生素D3、降钙素含量;股骨检测骨密度和骨生物力学;胫骨进行病理组织学检查。结果 与正常对照组比较,骨质疏松组的雄性大鼠出现了股骨、腰椎L4骨 密度下降,血清中的ALP升高,钙、磷、降钙素下降,股骨的最大应变和最大负荷下降,胫骨组织病理评分升高,均具有统计学差 异(P < 0.05或P < 0.01 );而雌性大鼠只见有股骨骨密度下降、ALP升高、胫骨组织病理评分升高(P < 0. 05或P < 0.01 )。此外,骨质疏松组雄性动物的骨小梁较该组雌性的减少、疏松和变细,差异均有统计学意义(B<0. 05 )。结论 制 备GIOP模型,雄性大鼠在症状和骨质疏松指标上较雌性大鼠更为明显、稳定。

关键词: 糖皮质激素性骨质疏松模型, 性别差异, 地塞米松

Abstract: Ob jective Study the effect of gender on glucocorticoid-induced osteoporosis(GIOP) rat model.Method The female and male rats of GIOP group were both injected dexamethasone 2.5 mg/kg intramuscularly from d1 to d21 and 1 mg/kg from d22 to d63 once every two days,while control group was injected equivalent normal saline intramuscularly.One h after the last injection,animals were sacrificed.The BMD of femur and L4 were measured by dual energy X-ray.ALP, Ca, P and Vitam in D3 of serum were determ ined.Tibia was collected for pathological examination.Result Compared with control group,the femur and L4 BMD ofmale rats in GIOP group were decreased, serum ALP increased while Ca, P and calcitonin decreased, and the score of tibia pathological examination increased.On the female rats of GIOP group, there're only femur BMD decreasing, ALP increasing and tibia pathological score increasing.Conclusion Compared with female rat,male rat is more suitable to be used to built glucocorticoid-induced osteoporosismodel.

Key words: Glucocorticoid-induced osteoporosis, effect of sex, Dexamethasone