Int J Mol Sci:FK506诱导骨形态发生蛋白通路和成骨的配体非依赖性激活

2019-04-23 不详 网络

骨诱导骨形态发生蛋白(BMPs),包括BMP-2,具有在原位和异位位置介导骨形成的独特能力。已显示免疫抑制大环内酯类通过FKBP12增强BMP-2活性,但这些尚未转化为有效的骨诱导疗法。在本文中,我们显示了FK506作为独立试剂的成骨活性,其在体外和体内都与BMP-2直接比较。 结果显示,FK506能够在C2C12细胞中产生与rhBMP-2相当的单独碱性磷酸酶诱导。FK506处理激活BMP受体,如

骨诱导骨形态发生蛋白(BMPs),包括BMP-2,具有在原位和异位位置介导骨形成的独特能力。已显示免疫抑制大环内酯类通过FKBP12增强BMP-2活性,但这些尚未转化为有效的骨诱导疗法。在本文中,我们显示了FK506作为独立试剂的成骨活性,其在体外和体内都与BMP-2直接比较。

结果显示,FK506能够在C2C12细胞中产生与rhBMP-2相当的单独碱性磷酸酶诱导。FK506处理激活BMP受体,如pSmad1/5水平增加所示,并且在BMP和TGF-β途径中产生明显更高的早期应答基因的mRNA水平。此外,FK506对碱性磷酸酶的诱导显示出对Noggin处理的抗性。通过在大鼠的异位皮下植入模型中在胶原海绵上局部递送来测试FK506的体内成骨活性。FK506的剂量反应显示与BMP-2递送产生的矿物体积相当的异位矿化水平增加。

总之,这些发现表明,FK506的使用可以在体外增强成骨细胞分化,并且当在体内局部递送时可以诱导矿化。

原始出处:

Sangadala S, Devereaux EJ, et al., FK506 Induces Ligand-Independent Activation of the Bone Morphogenetic Protein Pathway and Osteogenesis. Int J Mol Sci. 2019 Apr 17;20(8). pii: E1900. doi: 10.3390/ijms20081900.

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