补肾宁心方对小鼠绝经后骨质疏松的影响

目的 探讨补肾宁心方防治绝经后骨质疏松的作用.方法 建立BALB/c小鼠绝经后骨质疏松模型,灌服补肾宁心方浓缩液（简称补肾方组）,并以17 β-雌二醇为阳性对照（简称E2组）,以生理盐水为阴性对照（简称模型组）.12周后处死,取血测Th1/Th2型细胞因子;取椎骨（L3-4）和左股骨测骨密度（BMD）;取右股骨行骨组织形态计量分析;胫骨提取总RNA,半定量RT-PCR分析护骨素（OPG）的mRNA表达.计算子宫对体重的比值,并行子宫组织切片观察.结果 补肾方组的IFN-γ水平较模型组明显升高（P＜0.01）,而IL-4水平低于模型组（P＜0.05）.补肾方组与E2组小鼠的BMD均改善,骨小梁面积增加,OPG mRNA表达增加;但补肾方组小鼠的子宫明显小于E2组（P＜0.05）,与模型组比较差异无显著性.结论 补肾方能够选择性地防治绝经后骨质疏松,对子宫无或仅有轻微的刺激作用.其机制可能与调节Th1/Th2的偏移及提高OPG的表达,抑制破骨细胞的活性有关.

Predominant Effect of Bushen Ningxin Decoction on Postmenopausal Osteoporosisin Mice

OBJECTIVE: To investigate the preventive and therapeutic effect of Bushen Ningxin decoction (BSNX) on postmenopausal osteoporosis. METHODS: The BALB/c female mice postmenopausal osteoporosis model was established. The model mice were treated by BSNX, with 17beta-estradiol (E2) and normal saline as positive and negative control, respectively. All mice were sacrificed after 12 weeks' treatment, the serum cytokines Th1/Th2, bone mineral density (BMD) of vertebrae (L3 - 4) and left femur were determined, and morphological quantitative analysis of bone tissue of right femurs was performed and osteoprotegerin (OPG) mRNA expression in tibia was detected by semi-quantitative RT-PCR. The ratio in weight of uterus to body was calculated, and uterine slice was gotten for histological observation. RESULTS: As compared with the negative control group, the level of interferon-gamma (IFN-gamma) was significantly increased (P < 0.01) and interleukin-4 (IL-4) decreased (P < 0.05) in the BSNX treated group. The BMD of mice were improved, area of bone trabecula and OPG mRNA expression were increased in the BSNX treated and E2 treated group (P < 0.01). But the uterus in the former was significantly smaller than that in the latter (P < 0.01), while it was not significantly different to that in the negative control group. CONCLUSION: BSNX can selectively prevent and cure the postmenopausal osteoporosis, it has no or slight stimulation on uterus. The mechanism may relate with its effects in regulating the deviation of Th1/Th2, enhancing the OPG expression and inhibiting the activity of osteoclasts.