杨 燕 年宏蕾 刘仁慧,2 王秀娟.首都医科大学中医药学院,北京 00069;2.中医络病研究北京市重点实验室,北京 00069
淫羊藿女贞子对糖皮质激素性骨质疏松大鼠糖皮质激素受体作用的影响
杨燕1年宏蕾1刘仁慧1,2王秀娟1
1.首都医科大学中医药学院,北京100069;2.中医络病研究北京市重点实验室,北京100069
目的 研究淫羊藿女贞子煎剂及其有效成分提取物配伍对糖皮质激素性骨质疏松(GIOP)大鼠糖皮质激素(GC)及糖皮质激素受体(GR)的影响。方法 SPF级雄性SD大鼠60只,随机分为正常对照组(N组)、模型对照组(M组)、淫羊藿女贞子煎剂高、低剂量组(7、3.5 g/kg,YN高、低剂量组),淫羊藿女贞子提取物高、低剂量组(200、100 mg/kg,YNE高、低剂量组),每组10只。除N组外,大鼠两大腿内侧交替肌内注射地塞米松(1 mg/kg),每周2次,8周后,采用酶免法检测血清皮质酮(CORT)及GR含量,流式细胞术检测股骨GR蛋白表达量及结合力。结果与N比较,M组血清CORT及GR含量显著降低 (P<0.01),股骨GR蛋白表达量及结合力显著升高(P<0.01)。与M组比较,4个给药组均能显著增加血清CORT及GR含量(P<0.01),下调股骨GR蛋白表达量(P<0.01);YN高剂量组与YNE高、低剂量组能显著降低股骨GR蛋白结合力(P<0.01)。结论 淫羊藿女贞子抗GIOP的作用机制与抑制GR在骨组织的表达、降低GC对骨组织的作用有关。
骨质疏松;糖皮质激素;糖皮质激素受体;淫羊藿/女贞子
[Abstract]Objective To investigate the effects of combination of the decoction and active ingredients of Epimedii Folium and Fructus Ligustri Lucidi on glucocorticoid(GC)and its receptor(GR)in glucocorticoid-induced osteoporosis (GIOP)rats.Methods 60 male SD rats were randomly divided into 6 groups:the normal group(N group),the model group(M group),the decoction combination of Epimedii Folium and Ligustri Lucidi Fructus groups(7,3.5 g/kg,YN high dose group,YN low),and the extract combination groups(200,100 mg/kg,YNE high dose group,YNE low does group),each group had 10 rats.Except the N group,all rats received intramuscular injection of Dexamethasone(1 mg/kg)twice a week to establish osteoporosis model.After eight weeks,serum CORT and GR were detected by ELISA.The content and the binding force of GR in bone tissue were detected by flow cytometry.Results Serum CORT and GR in the M group were lower than the N group(P<0.01),while the content and the binding force of GR in bone tissue were higher (P<0.01).Compared with the M group,the levels of serum CORT and GR increased in all the treatment groups(P<0.01),while the expression of GR protein deceased in bone tissue(P<0.01).The binding force of GR in bone tissue reduced in the YN high dose group group(7 g/kg)and YNE high dose group,YNE low dose group(P<0.01). ConclusionThemechanismofthecombinationof Epimedii Folium and Fructus Ligustri Lucidi in treating GIOP may be related to the inhibition of GR expression in bone tissue and reducing the effect of GC on the bone.
[Key words]Osteoporosis;Glucocorticoid;Glucocorticoid receptor;Epimedii Folium/Fructus Ligustri Lucidi
糖皮质激素(glucocorticoid,GC)由于其良好而有效的抗炎、抗病毒、免疫等多种药理作用,被广泛应用于抗移免疫排斥、自身免疫疾病及肿瘤治疗等领域[1-2]。但长期大剂量使用GC治疗疾病同时会出现激素抵抗、激素依赖以及局部和全身性副作用。……