Liang Shao, Ji Zhang, Fan Hu, Wen Chai, Yuxuan Zhou, Pengtao Zou, Ping Zhang
{"title":"AHSA1/Hsp90α Complex Facilitates Microglial Mitophagy by Targeting TOMM70 in Parkinson Disease.","authors":"Liang Shao, Ji Zhang, Fan Hu, Wen Chai, Yuxuan Zhou, Pengtao Zou, Ping Zhang","doi":"10.1016/j.ajpath.2025.06.007","DOIUrl":null,"url":null,"abstract":"<p><p>Parkinson disease (PD) is a commonly diagnosed neurodegenerative disease with rising prevalence globally. However, the pathology of PD remains largely undefined. The aim of this study was to gain a better understanding of microglial mitophagy in PD. A 1-methyl-1,2,3,6-tetrahydropyidine (MPTP)-induced PD mouse model was established and validated by behavior tests. Western blot and immunofluorescence (IF) analyses showed that autophagy was enhanced in MPTP-induced PD mice. IF, qRT-PCR, Western blot, and co-immunoprecipitation analyses also revealed that silencing of heat shock protein 90α (Hsp90α) protected against mitophagy in PD mice. In the microglia/dopaminergic neuron co-culture system, ELISA assay, transmission electron microscopy, JC-1 staining, measurement of ATP content, and Annexin V/propidium iodide staining showed that lack of Hsp90α in MPTP-treated microglia attenuated dopaminergic neuronal death via suppressing mitophagy. IF staining and co-immunoprecipitation confirmed that Hsp90α formed a complex with activator of Hsp90 ATPase activity 1 (AHSA1), and this complex targeted the mitochondrial molecular switch TOMM70 in microglia. The Hsp90α inhibitor geldanamycin and AHSA1 knockdown further revealed that the AHSA1/Hsp90α complex regulated microglial mitophagy by targeting TOMM70 in MPTP-treated microglia and PD mice. In conclusion, the AHSA1/Hsp90α complex facilitated microglial mitophagy by targeting TOMM70 in PD.</p>","PeriodicalId":7623,"journal":{"name":"American Journal of Pathology","volume":" ","pages":""},"PeriodicalIF":3.6000,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"American Journal of Pathology","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1016/j.ajpath.2025.06.007","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PATHOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Parkinson disease (PD) is a commonly diagnosed neurodegenerative disease with rising prevalence globally. However, the pathology of PD remains largely undefined. The aim of this study was to gain a better understanding of microglial mitophagy in PD. A 1-methyl-1,2,3,6-tetrahydropyidine (MPTP)-induced PD mouse model was established and validated by behavior tests. Western blot and immunofluorescence (IF) analyses showed that autophagy was enhanced in MPTP-induced PD mice. IF, qRT-PCR, Western blot, and co-immunoprecipitation analyses also revealed that silencing of heat shock protein 90α (Hsp90α) protected against mitophagy in PD mice. In the microglia/dopaminergic neuron co-culture system, ELISA assay, transmission electron microscopy, JC-1 staining, measurement of ATP content, and Annexin V/propidium iodide staining showed that lack of Hsp90α in MPTP-treated microglia attenuated dopaminergic neuronal death via suppressing mitophagy. IF staining and co-immunoprecipitation confirmed that Hsp90α formed a complex with activator of Hsp90 ATPase activity 1 (AHSA1), and this complex targeted the mitochondrial molecular switch TOMM70 in microglia. The Hsp90α inhibitor geldanamycin and AHSA1 knockdown further revealed that the AHSA1/Hsp90α complex regulated microglial mitophagy by targeting TOMM70 in MPTP-treated microglia and PD mice. In conclusion, the AHSA1/Hsp90α complex facilitated microglial mitophagy by targeting TOMM70 in PD.
期刊介绍:
The American Journal of Pathology, official journal of the American Society for Investigative Pathology, published by Elsevier, Inc., seeks high-quality original research reports, reviews, and commentaries related to the molecular and cellular basis of disease. The editors will consider basic, translational, and clinical investigations that directly address mechanisms of pathogenesis or provide a foundation for future mechanistic inquiries. Examples of such foundational investigations include data mining, identification of biomarkers, molecular pathology, and discovery research. Foundational studies that incorporate deep learning and artificial intelligence are also welcome. High priority is given to studies of human disease and relevant experimental models using molecular, cellular, and organismal approaches.