The lncRNA TCONS_00021785/miR-21-5p/Trim33 axis regulates VMP1-mediated zymophagy, reduces the activation of trypsinogen, and promotes acinar cell recovery.

The lncRNA TCONS_00021785/miR-21-5p/Trim33 axis regulates VMP1-mediated zymophagy, reduces the activation of trypsinogen, and promotes acinar cell recovery.
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lncRNA TCONS_00021785/miR-21-5p/Trim33 轴调节 VMP1 介导的酶噬,减少胰蛋白酶原的激活,并促进腺泡细胞恢复

DOI:
10.1038/s41420-022-00862-4
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发表时间:
2022-02-15
影响因子:
7
通讯作者:
Xue D
Xue D
中科院分区:
医学2区
文献类型:
--
作者:
Wang Q;Yu J;Gao W;Sun Y;Liu X;Lv Z;Li L;Xue D

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急性胰腺炎早期,腺泡细胞内的胰蛋白酶原被激活,细胞通过酶噬清除胰蛋白酶,以避免损伤。研究表明,酶噬的底物是泛素化胰酶,但胰酶泛素化的机制和酶噬的调控机制尚不完全清楚。我们的结果表明 Trim33 可以增强细胞活力、减少细胞坏死并减少胰蛋白酶原激活。 Trim33 是介导胰蛋白酶泛素化的关键 E3 连接酶。结果表明,过表达Trim33可以显着增加VMP1 mRNA和蛋白水平。然而,敲除Trim33却产生了相反的效果,这表明Trim33作为转录介质,通过调节VMP1的表达来影响酶噬。此外,我们还探讨了Trim33分子的转录调控机制。我们的研究表明,lncRNA TCONS_00021785 可以竞争性结合 miR-21-5p 上调 Trim33,从而启动酶自噬并减少酶原激活。
In the early stage of acute pancreatitis, trypsinogen in acinar cells is activated, and the cells clear trypsin through zymophagy to avoid damage. Studies have shown that the substrate of zymophagy is ubiquitinated pancreatin, but the mechanism of pancreatin ubiquitination and the regulatory mechanism of zymophagy are not fully understood. Our results show that Trim33 can enhance cell viability, reduce cell necrosis, and reduce trypsinogen activation. Trim33 is a key E3 ligase enzyme that mediates trypsin ubiquitination. The results showed that overexpression of Trim33 can significantly increase VMP1 mRNA and protein levels. However, knocking down Trim33 produced the opposite effect, which indicates that Trim33, as a transcriptional mediator, affects zymophagy by regulating the expression of VMP1. In addition, we explored the transcriptional regulation mechanism of the Trim33 molecule. Our research shows that lncRNA TCONS_00021785 can competitively bind miR-21-5p to upregulate Trim33, thereby initiating enzyme autophagy and reducing zymogen activation.
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