microRNA-19a protects osteoblasts from dexamethasone via targeting TSC1.
microRNA-19a protects osteoblasts from dexamethasone via targeting TSC1.
复制标题
microRNA-19a 通过靶向 TSC1 保护成骨细胞免受地塞米松的影响
DOI:
10.18632/oncotarget.23326
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发表时间:
2018-01-05
期刊:
影响因子:
--
通讯作者:
Wang SG
中科院分区:
文献类型:
--
作者:
Liu G;Chen FL;Ji F;Fei HD;Xie Y;Wang SG
Activation of mTOR complex 1 (mTORC1) could protect human osteoblasts from dexamethasone. Tuberous sclerosis complex 1 (TSC1) is mTORC1 upstream inhibitory protein. We demonstrate here that microRNA-19a (“miR-19a”, -3p) targets the 3' untranslated regions of TSC1 mRNA. Expression of miR-19a downregulated TSC1 in OB-6 osteoblastic cells and primary human osteoblasts. miR-19a activated mTORC1 and protected human osteoblasts from dexamethasone. mTORC1 inhibition, by RAD001 or Raptor shRNA, almost completely abolished miR-19a-induced osteoblast cytoprotection against dexamethasone. Knockdown of TSC1 by targeted shRNA similarly induced mTORC1 activation and protected osteoblasts. Moreover, miR-19a activated mTORC1-dependent NF-E2-related factor 2 (Nrf2) signaling and inhibited dexamethasone-induced reactive oxygen species production in osteoblasts. Together, miR-19a protects human osteoblasts from dexamethasone possibly via targeting TSC1-mTORC1 signaling.
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作者:
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通讯作者:
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DOI:
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DOI:
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发表时间:
2016-03-18
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