LncRNA GAS5 protects against TGF-β-induced renal fibrosis via the Smad3/miRNA-142-5p axis.
LncRNA GAS5 protects against TGF-β-induced renal fibrosis via the Smad3/miRNA-142-5p axis.
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LncRNA GAS5 通过 Smad3/miRNA-142-5p 轴防止 TGF-β 诱导的肾纤维化。
DOI:
10.1152/ajprenal.00085.2021
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发表时间:
2021-09
期刊:
影响因子:
--
通讯作者:
Chen Yu
中科院分区:
文献类型:
--
作者:
Ying-Ying Zhang;Rui-Zhi Tan;Ying Yu;Yang-Yang Niu;Chen Yu
Increasing evidence shows that long noncoding RNAs (lncRNAs) play an important role in kidney disease. In this study, we investigated the role of lncRNA growth arrest-specific 5 (GAS5) in the pathogenesis of renal fibrosis. We found that GAS5 was markedly decreased in the fibrotic kidney of a unilateral ureteral obstructive (UUO) nephropathy mouse model by using real-time PCR. In addition, GAS5 was expressed in mouse tubular epithelial cells (mTECs) and interstitial fibroblasts in normal renal tissue and was especially highly expressed in the cytoplasm. In vitro experiments showed that GAS5 was downregulated by TGF-b1 in a dose- and time-dependent manner. Overexpression of GAS5 blocked TGF-b1-induced collagen I and fibronectin expression and vice versa. Mechanistic studies revealed that Smad3 but not Smad2 drove the regulation of GAS5. More importantly, GAS5 interacted with miR-142-5p and was involved in the renoprotective effect by participating in the competing endogenous RNA (ceRNA) network. Finally, we also found that knockdown of GAS5 promoted TGF-β1-induced mTEC apoptosis via the Smad3 pathway. Taken together, our results have uncovered a lncRNA/miRNA ceRNA network-based mechanism that modulates extracellular matrix formation and cell apoptosis via the Smad3 pathway.
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