Sci Rep:TG2通过Blimp1依赖性途径调节破骨细胞分化

2017-09-25 MedSci MedSci原创

转谷氨酰胺酶2(TG2)参与了多重反应,包括转酰胺化,且作为GTP结合蛋白在信号转导中起作用。在本研究中,研究人员发现TG2可控制小鼠的破骨细胞分化和骨平衡。破骨细胞在8个TG家族成员中特异性表达TG2同种型。使用siRNA抑制TG2的表达可导致从原代小鼠前体细胞响应于核因子κB配体(RANKL)的受体激活剂的破骨细胞形成增加。敲低TG2的这种破骨细胞生成作用与RANKL对c-Fos和NFATc1

转谷氨酰胺酶2(TG2)参与了多重反应,包括转酰胺化,且作为GTP结合蛋白在信号转导中起作用。

在本研究中,研究人员发现TG2可控制小鼠的破骨细胞分化和骨平衡。破骨细胞在8个TG家族成员中特异性表达TG2同种型。使用siRNA抑制TG2的表达可导致从原代小鼠前体细胞响应于核因子κB配体(RANKL)的受体激活剂的破骨细胞形成增加。敲低TG2的这种破骨细胞生成作用与RANKL对c-Fos和NFATc1的诱导增强有关。

此外,敲除TG2可以依赖NF-κB信号通路的方式上调B淋巴细胞诱导的成熟蛋白1(Blimp1),Blimp1是NF-κB信号通路的一种抗破骨细胞发生基因。相反,TG2过表达抑制破骨细胞形成和破骨细胞基因表达。与这些体外结果一致,与野生型小鼠相比,TG2敲除小鼠表现出较低的小梁骨质量以及破骨细胞数量的增加。

总之,该研究结果提供了有力的证据表明,TG2通过调节NF-κB-Blimp1信号通路抑制破骨细胞发生,从而在骨代谢中发挥作用。

原始出处:

Woo-Shin Kim, Haemin Kim, et al., Transglutaminase 2 regulates osteoclast differentiation via a Blimp1-dependent pathway. Sci Rep. 2017; 7: 10626. Published online 2017 Sep 6. doi: 10.1038/s41598-017-11246-5

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    2018-09-10 luoxiaog
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    2017-11-01 小不忍则

    学习了

    0

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    2017-09-26 明天会更好!

    谢谢分享.感觉收获很大

    0

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    2017-09-25 1201e5c5m39暂无昵称

    学习了

    0

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