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Choi HJ, Lee JY, Cha SJ, Han YJ, Yoon JH, Kim HJ, Kim K. FUS-induced neurotoxicity is prevented by inhibiting GSK-3β in a drosophila model of amyotrophic lateral sclerosis. Hum Mol Genet 2021; 31:850-862. [PMID: 34605896 DOI: 10.1093/hmg/ddab290] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 09/12/2021] [Accepted: 09/29/2021] [Indexed: 11/13/2022] Open
Abstract
Amyotrophic lateral sclerosis (ALS)-linked mutations in fused in sarcoma (FUS) lead to the formation of cytoplasmic aggregates in neurons. They are believed play a critical role in the pathogenesis of FUS-associated ALS. Therefore, the clearance and degradation of cytoplasmic FUS aggregates in neurons may be considered a therapeutic strategy for ALS. However, the molecular pathogenic mechanisms behind FUS-associated ALS remain poorly understood. Here, we report GSK-3β as a potential modulator of FUS-induced toxicity. We demonstrated that RNAi-mediated knockdown of Drosophila ortholog Shaggy in FUS-expressing flies suppresses defective phenotypes, including retinal degeneration, motor defects, motor neuron degeneration, and mitochondrial dysfunction. Furthermore, we found that cytoplasmic FUS aggregates were significantly reduced by Shaggy knockdown. In addition, we found that the levels of FUS proteins were significantly reduced by co-overexpression of Slimb, a F-box protein, in FUS-expressing flies, indicating that Slimb is critical for the suppressive effect of Shaggy/GSK-3β inhibition on FUS-induced toxicity in Drosophila. These findings revealed a novel mechanism of neuronal protective effect through SCFSlimb-mediated FUS degradation via GSK-3β inhibition, and provided in vivo evidence of the potential for modulating FUS-induced ALS progression using GSK-3β inhibitors.
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Affiliation(s)
- Hyun-Jun Choi
- Soonchunhyang Institute of Medi-bio Science, Soonchunhyang University, Cheonan 31151, Korea.,Department of Integrated Biomedical Sciences, Soonchunhyang University, Cheonan 31151, Korea
| | - Ji Young Lee
- Department of Medical Biotechnology, Soonchunhyang University, Asan 31538, Korea
| | - Sun Joo Cha
- Department of Medical Sciences, Soonchunhyang University, Asan 31538, Korea
| | - Yeo Jeong Han
- Department of Medical Biotechnology, Soonchunhyang University, Asan 31538, Korea.,Department of Medical Sciences, Soonchunhyang University, Asan 31538, Korea
| | - Ja Hoon Yoon
- Department of Medical Biotechnology, Soonchunhyang University, Asan 31538, Korea
| | - Hyung-Jun Kim
- Dementia Research Group, Korea Brain Research Institute (KBRI), Daegu 41068, Korea
| | - Kiyoung Kim
- Department of Medical Biotechnology, Soonchunhyang University, Asan 31538, Korea.,Department of Medical Sciences, Soonchunhyang University, Asan 31538, Korea
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Chatterjee S, Salimi A, Lee JY. Insights into amyotrophic lateral sclerosis linked Pro525Arg mutation in the fused in sarcoma protein through in silico analysis and molecular dynamics simulation. J Biomol Struct Dyn 2020; 39:5963-5976. [DOI: 10.1080/07391102.2020.1794967] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
| | - Abbas Salimi
- Department of Chemistry, Sungkyunkwan University, Suwon, Korea
| | - Jin Yong Lee
- Department of Chemistry, Sungkyunkwan University, Suwon, Korea
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