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RIP3 impedes transcription factor EB to suppress autophagic degradation in septic acute kidney injury

Autophagy is an important renal-protective mechanism in septic acute kidney injury (AKI). Receptor interacting protein kinase 3 (RIP3) has been implicated in the renal tubular injury and renal dysfunction during septic AKI. Here we investigated the role and mechanism of RIP3 on autophagy in septic A...

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Autores principales: Li, Ruizhao, Zhao, Xingchen, Zhang, Shu, Dong, Wei, Zhang, Li, Chen, Yuanhan, Li, Zhilian, Yang, Huan, Huang, Ying, Xie, Zhiyong, Wang, Weidong, Li, Chunling, Ye, Zhiming, Dong, Zheng, Liang, Xinling
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8187512/
https://www.ncbi.nlm.nih.gov/pubmed/34103472
http://dx.doi.org/10.1038/s41419-021-03865-8
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author Li, Ruizhao
Zhao, Xingchen
Zhang, Shu
Dong, Wei
Zhang, Li
Chen, Yuanhan
Li, Zhilian
Yang, Huan
Huang, Ying
Xie, Zhiyong
Wang, Weidong
Li, Chunling
Ye, Zhiming
Dong, Zheng
Liang, Xinling
author_facet Li, Ruizhao
Zhao, Xingchen
Zhang, Shu
Dong, Wei
Zhang, Li
Chen, Yuanhan
Li, Zhilian
Yang, Huan
Huang, Ying
Xie, Zhiyong
Wang, Weidong
Li, Chunling
Ye, Zhiming
Dong, Zheng
Liang, Xinling
author_sort Li, Ruizhao
collection PubMed
description Autophagy is an important renal-protective mechanism in septic acute kidney injury (AKI). Receptor interacting protein kinase 3 (RIP3) has been implicated in the renal tubular injury and renal dysfunction during septic AKI. Here we investigated the role and mechanism of RIP3 on autophagy in septic AKI. We showed an activation of RIP3, accompanied by an accumulation of the autophagosome marker LC3II and the autophagic substrate p62, in the kidneys of lipopolysaccharide (LPS)-induced septic AKI mice and LPS-treated cultured renal proximal tubular epithelial cells (PTECs). The lysosome inhibitor did not further increase the levels of LCII or p62 in LPS-treated PTECs. Moreover, inhibition of RIP3 attenuated the aberrant accumulation of LC3II and p62 under LPS treatment in vivo and in vitro. By utilizing mCherry-GFP-LC3 autophagy reporter mice in vivo and PTECs overexpression mRFP-GFP-LC3 in vitro, we observed that inhibition of RIP3 restored the formation of autolysosomes and eliminated the accumulated autophagosomes under LPS treatment. These results indicated that RIP3 impaired autophagic degradation, contributing to the accumulation of autophagosomes. Mechanistically, the nuclear translocation of transcription factor EB (TFEB), a master regulator of the lysosome and autophagy pathway, was inhibited in LPS-induced mice and LPS-treated PTECs. Inhibition of RIP3 restored the nuclear translocation of TFEB in vivo and in vitro. Co-immunoprecipitation further showed an interaction of RIP3 and TFEB in LPS-treated PTECs. Also, the expression of LAMP1 and cathepsin B, two potential target genes of TFEB involved in lysosome function, were decreased under LPS treatment in vivo and in vitro, and this decrease was rescued by inhibiting RIP3. Finally, overexpression of TFEB restored the autophagic degradation in LPS-treated PTECs. Together, the present study has identified a pivotal role of RIP3 in suppressing autophagic degradation through impeding the TFEB-lysosome pathway in septic AKI, providing potential therapeutic targets for the prevention and treatment of septic AKI.
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spelling pubmed-81875122021-06-28 RIP3 impedes transcription factor EB to suppress autophagic degradation in septic acute kidney injury Li, Ruizhao Zhao, Xingchen Zhang, Shu Dong, Wei Zhang, Li Chen, Yuanhan Li, Zhilian Yang, Huan Huang, Ying Xie, Zhiyong Wang, Weidong Li, Chunling Ye, Zhiming Dong, Zheng Liang, Xinling Cell Death Dis Article Autophagy is an important renal-protective mechanism in septic acute kidney injury (AKI). Receptor interacting protein kinase 3 (RIP3) has been implicated in the renal tubular injury and renal dysfunction during septic AKI. Here we investigated the role and mechanism of RIP3 on autophagy in septic AKI. We showed an activation of RIP3, accompanied by an accumulation of the autophagosome marker LC3II and the autophagic substrate p62, in the kidneys of lipopolysaccharide (LPS)-induced septic AKI mice and LPS-treated cultured renal proximal tubular epithelial cells (PTECs). The lysosome inhibitor did not further increase the levels of LCII or p62 in LPS-treated PTECs. Moreover, inhibition of RIP3 attenuated the aberrant accumulation of LC3II and p62 under LPS treatment in vivo and in vitro. By utilizing mCherry-GFP-LC3 autophagy reporter mice in vivo and PTECs overexpression mRFP-GFP-LC3 in vitro, we observed that inhibition of RIP3 restored the formation of autolysosomes and eliminated the accumulated autophagosomes under LPS treatment. These results indicated that RIP3 impaired autophagic degradation, contributing to the accumulation of autophagosomes. Mechanistically, the nuclear translocation of transcription factor EB (TFEB), a master regulator of the lysosome and autophagy pathway, was inhibited in LPS-induced mice and LPS-treated PTECs. Inhibition of RIP3 restored the nuclear translocation of TFEB in vivo and in vitro. Co-immunoprecipitation further showed an interaction of RIP3 and TFEB in LPS-treated PTECs. Also, the expression of LAMP1 and cathepsin B, two potential target genes of TFEB involved in lysosome function, were decreased under LPS treatment in vivo and in vitro, and this decrease was rescued by inhibiting RIP3. Finally, overexpression of TFEB restored the autophagic degradation in LPS-treated PTECs. Together, the present study has identified a pivotal role of RIP3 in suppressing autophagic degradation through impeding the TFEB-lysosome pathway in septic AKI, providing potential therapeutic targets for the prevention and treatment of septic AKI. Nature Publishing Group UK 2021-06-08 /pmc/articles/PMC8187512/ /pubmed/34103472 http://dx.doi.org/10.1038/s41419-021-03865-8 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Li, Ruizhao
Zhao, Xingchen
Zhang, Shu
Dong, Wei
Zhang, Li
Chen, Yuanhan
Li, Zhilian
Yang, Huan
Huang, Ying
Xie, Zhiyong
Wang, Weidong
Li, Chunling
Ye, Zhiming
Dong, Zheng
Liang, Xinling
RIP3 impedes transcription factor EB to suppress autophagic degradation in septic acute kidney injury
title RIP3 impedes transcription factor EB to suppress autophagic degradation in septic acute kidney injury
title_full RIP3 impedes transcription factor EB to suppress autophagic degradation in septic acute kidney injury
title_fullStr RIP3 impedes transcription factor EB to suppress autophagic degradation in septic acute kidney injury
title_full_unstemmed RIP3 impedes transcription factor EB to suppress autophagic degradation in septic acute kidney injury
title_short RIP3 impedes transcription factor EB to suppress autophagic degradation in septic acute kidney injury
title_sort rip3 impedes transcription factor eb to suppress autophagic degradation in septic acute kidney injury
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8187512/
https://www.ncbi.nlm.nih.gov/pubmed/34103472
http://dx.doi.org/10.1038/s41419-021-03865-8
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