葛根异黄酮对去卵巢大鼠骨矿密度和骨强度的影响

Effects of total isoflavones of Pueraria DC. on bone mineral density and bone strength in ovariectomized rats

目的 研究葛根总异黄酮 (TIP)对雌激素缺乏引起的骨质疏松症的防治作用。方法 10月龄 SD大鼠 ,手术切除双侧卵巢后 7d,每天 ig TIP10 0和 2 0 mg/kg,并设假手术组 (Sham)、模型对照组 (OVX)和尼尔雌醇阳性组(E3)。在给药 4和 7个月时 ,测定大鼠全身骨矿总量 (BMC)和骨矿密度 (BMD)及骨生物力学强度等。结果 (1)和OVX组相比 ,TIP大剂量组在给药 4个月时 BMC和 BMD分别提高 14.6 %和 12 .1% ,7个月时分别提高 6 .8%和14.2 % ;小剂量组 4个月时分别提高 7.8%和 6 .9% ,7个月时分别提高 8.6 %和 14.9%。 (2 ) TIP大、小剂量组股骨相对体积质量分别提高 3.8%和 3.4% ;胫骨相对体积质量分别提高 6 .8%和 6 .3% ;股骨 Ca盐密度均提高 15 %以上。 (3) TIP大、小剂量组股骨最大负荷分别提高 16 .1%和 9.1% ;结构强度分别提高 19.4%和 12 .5 %。 (4) TIP使大鼠子宫重量明显增加。结论 TIP对去卵巢引起的大鼠骨质疏松症具有明显的防治作用 ,这种作用可能和它的弱雌激素样活性有关。

Object To observe the protective effect of total isoflavones of pueraria DC (TIP) on osteoporosis induced by estrogen deficient rat Methods 42 10 month old female SD rats were bilaterally ovariectomized and 10 animals were made sham operation (Sham) under anesthesia. After 7 d, the ovariectomized rats were divided into 4 groups: untreated control (OVX) group (n=12); 2 treated groups (n= 10 each), one with 100 mg/kg TIP ig and the other with 20 mg/kg TIP ig, and a niylestrol group (E 3) (n= 10) The total body bone mineral content (BMC), and bone mineral density (BMD) and bone biodynamics were detected at 4th and 7th month Results 1 Compared with OVX group, BMC and BMD in TIP 100 mg/kg group were increased by 14 6% and 12.1% at 4th month, by 6 8% and 14 2% at 7th month, while in TIP 20 mg/kg group by 7 8% and 6 9% at 4th month, by 8 6% and 14 9% at 7th month 2 The densities of femur in TIP 100 and 20 mg/kg groups were respectively increased by 3 8% and 3 4%, while those of tibia by 6 8% and 6 3% than that of OVX control group The Ca contents were increased by more than 15% in the TIP treated groups 3 The maximum load and structural strength of femur were increased by 16 1% and 19 4% in TIP 100 mg/kg group and 9 1% and 12 5% in TIP 20 mg/kg group than OVX control group These parameters in tibia were also improved 4 Uterine weights both in TIP 100 and 20 mg/kg groups were almost increased by one fold than OVX group Conclusion TIP can protect osteoporosis induced by ovariectomized rats and these effect may be attributable to its week estrogen like action