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Baicalein Activates Parkin-Dependent Mitophagy through NDP52 and OPTN

The elimination of intracellular components by autophagy maintains metabolic homeostasis and is a quality-control pathway that enables organelle regeneration. Mitophagy is a type of selective autophagy that regulates mitochondrial turnover, and the dysregulation of mitophagy has been implicated in t...

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Autores principales: Ke, Po-Yuan, Chang, Chih-Wei, Hsiao, Yuan-Chao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8997844/
https://www.ncbi.nlm.nih.gov/pubmed/35406696
http://dx.doi.org/10.3390/cells11071132
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author Ke, Po-Yuan
Chang, Chih-Wei
Hsiao, Yuan-Chao
author_facet Ke, Po-Yuan
Chang, Chih-Wei
Hsiao, Yuan-Chao
author_sort Ke, Po-Yuan
collection PubMed
description The elimination of intracellular components by autophagy maintains metabolic homeostasis and is a quality-control pathway that enables organelle regeneration. Mitophagy is a type of selective autophagy that regulates mitochondrial turnover, and the dysregulation of mitophagy has been implicated in the pathogenesis of liver diseases. However, the detailed molecular mechanism underlying mitophagy regulation in liver cells remains unclear, and the small molecules that may potentially modulate hepatic mitophagy are still unavailable. Here, we report that baicalein, a flavonoid extracted from Scutellaria baicalensis, induces the entire autophagy that proceeds through the autolysosome maturation stage in human hepatoma cells. In addition, baicalein-induced autophagy is demonstrated to target mitochondria for degradation. Further studies show that baicalein triggers the translocation of Parkin and TBK1 to mitochondria to induce mitophagy. Moreover, the phosphorylation of TBK1 at Ser172 and ubiquitin at Ser65 is shown to trigger mitophagy in baicalein-treated cells. Furthermore, two specific autophagy cargo receptors, NDP52 and OPTN, that function in baicalein-activated mitophagy are identified. Taken together, these findings not only delineate the molecular process of Parkin-dependent mitophagy in liver cells, but also reveal baicalein as a novel inducer of hepatic mitophagy.
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spelling pubmed-89978442022-04-12 Baicalein Activates Parkin-Dependent Mitophagy through NDP52 and OPTN Ke, Po-Yuan Chang, Chih-Wei Hsiao, Yuan-Chao Cells Article The elimination of intracellular components by autophagy maintains metabolic homeostasis and is a quality-control pathway that enables organelle regeneration. Mitophagy is a type of selective autophagy that regulates mitochondrial turnover, and the dysregulation of mitophagy has been implicated in the pathogenesis of liver diseases. However, the detailed molecular mechanism underlying mitophagy regulation in liver cells remains unclear, and the small molecules that may potentially modulate hepatic mitophagy are still unavailable. Here, we report that baicalein, a flavonoid extracted from Scutellaria baicalensis, induces the entire autophagy that proceeds through the autolysosome maturation stage in human hepatoma cells. In addition, baicalein-induced autophagy is demonstrated to target mitochondria for degradation. Further studies show that baicalein triggers the translocation of Parkin and TBK1 to mitochondria to induce mitophagy. Moreover, the phosphorylation of TBK1 at Ser172 and ubiquitin at Ser65 is shown to trigger mitophagy in baicalein-treated cells. Furthermore, two specific autophagy cargo receptors, NDP52 and OPTN, that function in baicalein-activated mitophagy are identified. Taken together, these findings not only delineate the molecular process of Parkin-dependent mitophagy in liver cells, but also reveal baicalein as a novel inducer of hepatic mitophagy. MDPI 2022-03-28 /pmc/articles/PMC8997844/ /pubmed/35406696 http://dx.doi.org/10.3390/cells11071132 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ke, Po-Yuan
Chang, Chih-Wei
Hsiao, Yuan-Chao
Baicalein Activates Parkin-Dependent Mitophagy through NDP52 and OPTN
title Baicalein Activates Parkin-Dependent Mitophagy through NDP52 and OPTN
title_full Baicalein Activates Parkin-Dependent Mitophagy through NDP52 and OPTN
title_fullStr Baicalein Activates Parkin-Dependent Mitophagy through NDP52 and OPTN
title_full_unstemmed Baicalein Activates Parkin-Dependent Mitophagy through NDP52 and OPTN
title_short Baicalein Activates Parkin-Dependent Mitophagy through NDP52 and OPTN
title_sort baicalein activates parkin-dependent mitophagy through ndp52 and optn
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8997844/
https://www.ncbi.nlm.nih.gov/pubmed/35406696
http://dx.doi.org/10.3390/cells11071132
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