Hypoxia-inducible factor-1α activates transforming growth factor-β1/Smad signaling and increases collagen deposition in dermal fibroblasts.
Hypoxia-inducible factor-1α activates transforming growth factor-β1/Smad signaling and increases collagen deposition in dermal fibroblasts.
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缺氧诱导因子-1a 激活转化生长因子-β 1/Smad 信号传导并增加真皮成纤维细胞中的胶原蛋白沉积
DOI:
10.18632/oncotarget.23225
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发表时间:
2018-01-09
期刊:
影响因子:
--
通讯作者:
Jinghong X
中科院分区:
文献类型:
--
作者:
Mingyuan X;Qianqian P;Shengquan X;Chenyi Y;Rui L;Yichen S;Jinghong X
Hypoxia of local tissue occurs during the scar formation; however, the degree of ischemia and hypoxia in the central areas of keloids is more serious than those in normal scars. Hypoxia-induced factor (HIF), is one of the main cellular responses to hypoxia, allowing cells to adapt to low-oxygen conditions. We investigated the correlation among hypoxia, transforming growth factor-β1/Smad signaling and collagen deposition. Hypoxia up-regulated TGF-β1, Smad2/3, p-Smad2/3, Smad4, and total collagen in both normal and keloid fibroblasts via HIF-1α, which was attenuated by HIF-1α inhibition, but TβRII levels were not significantly altered. Silencing Smad4 under hypoxia decreased the mRNA and protein levels of HIF-1α, suggesting up-regulated Smad4 may also plays a role in promoting HIF-1α. Finally, we examined the role of the TGF-β1/Smad pathway in collagen deposition. When TβRII was inhibited by ITD-1 under hypoxic conditions, p-Smad2/3 levels and collagen deposition decreased. When inhibited TβRII by siRNA under normoxia, the levels of p-Smad2/3, Smad4 and collagen deposition also decreased. This result demonstrated that hypoxia promoted TGF-β1/Smad signaling via HIF-1α and that both HIF-1α and the TGF-β1/Smad signaling promotes collagen deposition in hypoxia, which is an important mechanism of keloid formation.
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影响因子:
64.8
作者:
Rius, Jordi;Guma, Monica;Karin, Michael
通讯作者:
Karin, Michael
影响因子:
3.3
作者:
Chen, YF;Feng, JA;Oparil, S
通讯作者:
Oparil, S
DOI:
10.1038/nrm3434
发表时间:
2012-10
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
通讯作者:
--
影响因子:
3.6
作者:
Bettinger, DA;Yager, DR;Cohen, IK
通讯作者:
Cohen, IK
影响因子:
4.6
作者:
Deschene, Karine;Celeste, Christophe;Theoret, Christine L.
通讯作者:
Theoret, Christine L.