2β-(3-羟丙氧)-骨化三醇(ED-71)对卵巢切除小鼠骨生物力学与骨代谢的影响

目的 :　探讨合成的 2β-(3 -羟丙氧 ) -骨化三醇 (ED-71 )对卵巢切除 (OVX)小鼠骨密度、骨强度和骨代谢指标的影响。并与 1 7β雌二醇 (E2 )进行比较。方法 :　将 40只平均体重 3 5 g昆明雌性小鼠分为 4组 ,OVX组 ,假手术组 ,ED-71组 ,1 7β雌二醇 (E2 )组。后两组为 OVX小鼠 ,经 6w分别给予 ED-71 [0 .4μg/ (kg·w) ]及 E2 [3 0 μg/ (kg·d) ]后处死各组小鼠 ,测定其骨密度 (BMD)和骨矿含量 (BMC)、骨生物力学、骨形态计量学及生化指标。结果 :　 ED-71组和 E2 组分别与 OVX组比较 ,股骨 BMD和 BMC分别增加了 3 .8% ,5 .9%及 3 .2 % ,5 .7% ;股骨最大载荷分别增加 1 8.7%和 1 6% ;骨小梁体积分别增加 1 0 .6%和 1 6.1 % ,血清碱性磷酸酶 (ALP)分别减少 5 8%和 3 7%。结论 :　 ED-71可明显增加骨密度和骨矿含量及骨强度 ,降低骨转换 ,而且不引起子宫增生

EFFECTS OF 2β-(3-HYDROXYPROPOXY)-CALCITRIOL ON BONE MASS AND STRENGTH AND BONE METABOLISM IN OVARIECTOMIZED MICE

Objective: To compare the effects of synthetic 2 β(3 hydroxypropoxy) calcitriol(ED 71) with 17 β Estrodiol(E 2) on bone mass, strength and metabolism in ovariectomized(OVX) mice. Methods: 40 female Kunming mice, average 35 g, were randomly divided into 4 groups: OVX group, Sham group, ED 71 group and E 2 group. The latter two groups were also ovariectomized and given ED 71 at 0.4 μg/(kg·d) and E 2 at 30 μg/(kg·d) respectively for 6 w. Bone mineral density(BMD), bone mineral content(BMC), bone strength and bone histomorphometric parameters were measured. Results: Compared with OVX mice, in ED 71 and E 2 group, femoral BMD and BMC increased respectively by 3.8%, 5.9% and 3.2%,5.7%; maximum load of femur increased respectively 18.7% and 16%; trabecular bone volume of lumbar vertebra increased respectively 10.6% and 16.1 and serum alkaline phosphatase decreased respectively by 58% and 37%. Conclusion: ED 71 significantly increased BMD, BMC and bone strengh and significantly inhibited bone turnover in OVX mice. Also ED 71 does not induce uterus proliferation.