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The effects of luteolin on osteoclast differentiation, function in vitro and ovariectomy-induced bone loss

机译:木犀草素对破骨细胞分化,体外功能和卵巢切除术引起的骨质流失的影响

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Flavonoids, a group of polyphenolic compounds abundant in plants, are known to prevent bone loss in ovariectomized (OVX) animal models. Inhibition of osteoclast differentiation and bone resorption is considered as an effective therapeutic approach in the treatment of postmenopausal bone loss. Luteolin, a plant flavonoid, has potent anti-inflammatory properties both in vivo and vitro. In this study, we found that luteolin markedly decreased the differentiation of both bone marrow mononuclear cells and Raw264.7 cells into osteoclasts. Luteolin also inhibited the bone resorptive activity of differentiated osteoclasts. We further investigated the effects of luteolin on ovariectomy-induced bone loss using micro-computed tomography, biomechanical tests and serum markers assay for bone remodeling. Oral administration of luteolin (5 and 20 mg/kg per day) to OVX mice caused significant increase in bone mineral density and bone mineral content of trabecular and cortical bones in the femur as compared to those of OVX controls, and prevented decreases of bone strength indexes induced by OVX surgery. Serum biochemical markers assays revealed that luteolin prevents OVX-induced increases in bone turnover. These data strongly suggest that luteolin has the potential for prevention of bone loss in postmenopausal osteoporosis by reducing both osteoclast differentiation and function
机译:类黄酮是植物中大量的多酚类化合物,在卵巢切除(OVX)动物模型中可防止骨质流失。抑制破骨细胞分化和骨吸收被认为是治疗绝经后骨质流失的有效治疗方法。木犀草素,一种植物类黄酮,在体内和体外均具有有效的抗炎特性。在这项研究中,我们发现木犀草素显着降低了骨髓单个核细胞和Raw264.7细胞向破骨细胞的分化。木犀草素还抑制分化的破骨细胞的骨吸收活性。我们进一步研究了木犀草素对卵巢切除术引起的骨丢失的影响,使用微计算机断层扫描,生物力学测试和血清标志物测定来进行骨重塑。与OVX对照组相比,口服OVX小鼠口服木犀草素(每天5和20 mg / kg)可导致股骨小梁和皮质骨的骨矿物质密度和骨矿物质含量显着增加,并防止骨强度降低OVX手术诱发的指标。血清生化标志物测定显示木犀草素可防止OVX引起的骨转换增加。这些数据强烈表明,木犀草素具有通过减少破骨细胞分化和功能来预防绝经后骨质疏松症骨丢失的潜力。

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