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http://ir.nhri.org.tw/handle/3990099045/11938
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| Title: | TDP-43 induces mitochondrial damage and activates the mitochondrial unfolded protein response |
| Authors: | Wang, P;Deng, J;Dong, J;Liu, J;Bigio, EH;Mesulam, M;Wang, T;Sun, L;Wang, L;Lee, AY;McGee, WA;Chen, X;Fushimi, K;Zhu, L;Wu, JY |
| Contributors: | National Institute of Cancer Research |
| Abstract: | Mutations in or dys-regulation of the TDP-43 gene have been associated with TDP-43 proteinopathy, a spectrum of neurodegenerative diseases including Frontotemporal Lobar Degeneration (FTLD) and Amyotrophic Lateral Sclerosis (ALS). The underlying molecular and cellular defects, however, remain unclear. Here, we report a systematic study combining analyses of patient brain samples with cellular and animal models for TDP-43 proteinopathy. Electron microscopy (EM) analyses of patient samples revealed prominent mitochondrial impairment, including abnormal cristae and a loss of cristae; these ultrastructural changes were consistently observed in both cellular and animal models of TDP-43 proteinopathy. In these models, increased TDP-43 expression induced mitochondrial dysfunction, including decreased mitochondrial membrane potential and elevated production of reactive oxygen species (ROS). TDP-43 expression suppressed mitochondrial complex I activity and reduced mitochondrial ATP synthesis. Importantly, TDP-43 activated the mitochondrial unfolded protein response (UPRmt) in both cellular and animal models. Down-regulating mitochondrial protease LonP1 increased mitochondrial TDP-43 levels and exacerbated TDP-43-induced mitochondrial damage as well as neurodegeneration. Together, our results demonstrate that TDP-43 induced mitochondrial impairment is a critical aspect in TDP-43 proteinopathy. Our work has not only uncovered a previously unknown role of LonP1 in regulating mitochondrial TDP-43 levels, but also advanced our understanding of the pathogenic mechanisms for TDP-43 proteinopathy. Our study suggests that blocking or reversing mitochondrial damage may provide a potential therapeutic approach to these devastating diseases. |
| Date: | 2019-05 |
| Relation: | PLoS Genetics. 2019 May;15(5):Article number e1007947. |
| Link to: | http://dx.doi.org/10.1371/journal.pgen.1007947 |
| JIF/Ranking 2023: | http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=1553-7404&DestApp=IC2JCR |
| Cited Times(WOS): | https://www.webofscience.com/wos/woscc/full-record/WOS:000470208000005 |
| Cited Times(Scopus): | https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85066255091 |
| Appears in Collections: | [李岳倫] 期刊論文
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| PUB31100073.pdf | | 6671Kb | Adobe PDF | 406 | View/Open |
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