雌激素对去卵巢大鼠骨组织中骨保护素、破骨细胞分化因子和巨噬细胞集落刺激因子mRNA表达的影响

目的观察雌激素对去卵巢大鼠骨组织中骨保护素(OPG)、破骨细胞分化因子(ODF)和巨噬细胞集落刺激因子 (M-CSF)mRNA表达的影响,探讨雌激素预防和治疗绝经后骨质疏松(PMO)的可能细胞因子途径。方法健康3月龄雌性SD大鼠30只,随机等分为假手术组,去卵巢组和雌激素组(已烯雌酚片,0．0225 mg·kg-1·d-1,灌胃)。假手术组仅牵动卵巢,其余两组均行卵巢切除术。12周后取第3-6腰椎做骨密度检查。取股骨提总RNA。实时定量PCR法检测上述因子mRNA的表达情况。结果 (1)相对于去卵巢组,雌激素组大鼠腰椎骨密度增高,差异有统计学意义。(2)相对于去卵巢组,雌激素组大鼠骨组织OPG的mRNA表达增高,M-CSF的mRNA表达下降,ODF／OPG值下降。结论雌激素治疗绝经后骨质疏松的效应可能与其调控OPG,M-CSF的表达和ODF／OPG值有关。

Effect of estrogen on osteoprotegerin, osteoclast differentiation factor and macrophage colony stimulating factor mRNA expressions in ovariectomized rat bone tissue

Objective To observe the effect of the estrogen on the mRNA expression of osteoprotegerin (OPG), osteoclast differentiation factor (ODF) and macrophage colony stimulating factor (M-CSF) in bone tissue of ovariectomized rats, and investigate the possible pathway of estrogen in preventing and treating postmenopausal osteoporosis. Methods Thirty healthy adult SD rats were randomly divided into sham operation group, ovariectomized group and estrogen-treated group. All rats were ovariectomized except those in the sham operation group. Bone density of the L3-L6 vertebra was detected 12 weeks after the operation. the total RNA were extracted from the femur to examine mRNA expression of OPG, ODF and M-CSF by real-time PCR. Results Estrogen increased the bone density of the ovariectomized rat lumbar vertebra and up-regulated the expression of OPG, whereas down-regulated the expression of M-CSF and lowered ODF:OPG ratio. Conclusion The effect of estrogen in treating postmenopausal osteoporosis is closely correlated with the regulation of OPG and M-CSF expressions and ODF:OPG ratio.