Clin oral invest:长期使用阿仑膦酸钠对雌激素缺乏大鼠骨再生的作用

2017-12-16 MedSci MedSci原创

TGF-β1是一种细胞因子,可通过Runx-2诱导骨生成,也可通过α-平滑肌肌动蛋白(α-SMA)的转录诱导纤维化。由于先前已知阿仑膦酸钠会提高TGF-β1的表达水平,并且在通常的骨代谢条件下,雌激素可以抑制TGF-β1的纤维化作用。本研究的目的是评估在雌激素缺乏大鼠中颅内术后应用阿仑膦酸钠是否改变细胞分化。

TGF-β1是一种细胞因子,可通过Runx-2诱导骨生成,也可通过α-平滑肌肌动蛋白(α-SMA)的转录诱导纤维化。由于先前已知阿仑膦酸钠会提高TGF-β1的表达水平,并且在通常的骨代谢条件下,雌激素可以抑制TGF-β1的纤维化作用。本研究的目的是评估在雌激素缺乏大鼠中颅内术后应用阿仑膦酸钠是否改变细胞分化。

材料和方法:在卵巢 - 输卵管卵巢切除术后的32只雌性大鼠的颅骨上制造一个直径5mm的经骨缺损。所有缺损均采用自体骨移植,16只大鼠在术后第15天和第60天每周三次施用3mg / kg阿仑膦酸钠至安乐死。进行TGF-β1,雌激素受体α(α-ER),α-SMA,BMPR1B和Runx-2表达的组织形态计量学和免疫组织化学分析,ELISA法测定雌激素水平。

结果:所有动物在卵巢 - 输卵管卵巢切除术后雌激素水平均低。组织学结果显示术后第15天用阿仑膦酸盐治疗的样本中骨基质沉积较大。与对照组相比,结果与TGF-β1,BMPR1B和Runx-2共表达高有关。另外,手术后第60天,阿仑膦酸钠组与对照组相比,第15天至第60天的骨基质沉积增加是不连续的。这一结果与TGF-β1,α-ER和α-SMA的强烈同时表达相一致,而BMPR1B和Runx-2的表达降低。

结论:由于同时发生低雌激素和存在TGF-β1+ /α-ER +诱导存在α-SMA +,延长阿仑膦酸盐的使用改变了卵巢 - 输卵管卵巢切除样本中的颅骨修复,而BMPR1B和Runx-2抑制。

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    2018-09-01 小几洁
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    2017-12-18 lsj630
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    2017-12-16 Y—xianghai

    学习了新知识

    0

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