Atp7a deficiency induces axonal and myelin developmental defects in zebrafish via ferroptosis
ATP7A genetic mutations lead to Menkes disease (MD), a hereditary neurodegenerative disorder develops significant metabolic abnormalities including copper deficiency and hypomyelination, and even death before 3 years old. However, the underlying mechanisms remain poorly understood. In this study, a...
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Elsevier
2025-09-01
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| Series: | Neurobiology of Disease |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0969996125002438 |
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| author | You Wu Jiahuan Li Wenya Zhai Wenye Liu Hao Wu Hong Liu Junxia Min Fudi Wang Jing-Xia Liu |
| author_facet | You Wu Jiahuan Li Wenya Zhai Wenye Liu Hao Wu Hong Liu Junxia Min Fudi Wang Jing-Xia Liu |
| author_sort | You Wu |
| collection | DOAJ |
| description | ATP7A genetic mutations lead to Menkes disease (MD), a hereditary neurodegenerative disorder develops significant metabolic abnormalities including copper deficiency and hypomyelination, and even death before 3 years old. However, the underlying mechanisms remain poorly understood. In this study, a dysfunction in axons as evidenced by the shortened axons, reduced branching in each axon, thinner spinal myelin sheaths, and a significant decrease in neuronal membrane potential, was manifested in the central nervous system (CNS) of atp7a−/− larvae. Atp7a is indispensable for the axonal survival in a cell-autonomous manner by fine-tuning copper homeostasis. The transcriptomics analysis identified a significant enrichment of ferroptosis among the differentially expressed genes (DEGs). Iron overload, GPX4 degradation, and lipid peroxidation, the fundamental characteristics of ferroptosis, were evident during atp7a ablation. More importantly, administration of ferroptosis inhibitor Fer-1 or iron chelator DFO, substantially suppressed ferroptosis and largely ameliorated axonal and myelin defects in atp7a−/− larvae. Whereas, larvae exposed to ferroptosis inducer RSL3, and engineered larvae developing ferroptosis, phenocopied the myelin and axonal extension defects observed in atp7a−/− mutants. Taken together, this study highlights the critical importance of atp7a in supporting axonal and myelin development during zebrafish embryogenesis by tightly restraining ferroptosis. This study will shed some light on the theoretical basis and therapeutic targets underlying ATP7A dysfunction induced neurodegenerative diseases. |
| format | Article |
| id | doaj-art-0c40cd1fd1e14bcdb6307be2a8cef866 |
| institution | DOAJ |
| issn | 1095-953X |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
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| series | Neurobiology of Disease |
| spelling | doaj-art-0c40cd1fd1e14bcdb6307be2a8cef8662025-08-20T03:13:42ZengElsevierNeurobiology of Disease1095-953X2025-09-0121310702710.1016/j.nbd.2025.107027Atp7a deficiency induces axonal and myelin developmental defects in zebrafish via ferroptosisYou Wu0Jiahuan Li1Wenya Zhai2Wenye Liu3Hao Wu4Hong Liu5Junxia Min6Fudi Wang7Jing-Xia Liu8College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, ChinaState Key Laboratory of Agricultural Microbiology, College of Animal Science & Technology and College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan 430070, ChinaCollege of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, ChinaCollege of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, ChinaState Key Laboratory of Agricultural Microbiology, College of Animal Science & Technology and College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan 430070, ChinaCollege of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, ChinaThe First Affiliated Hospital, The Second Affiliated Hospital, Institute of Translational Medicine, School of Public Health, School of Medicine, Zhejiang University, Hangzhou 310013, China; Corresponding authors.The First Affiliated Hospital, The Second Affiliated Hospital, Institute of Translational Medicine, School of Public Health, School of Medicine, Zhejiang University, Hangzhou 310013, China; Corresponding authors.College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China; Corresponding authors.ATP7A genetic mutations lead to Menkes disease (MD), a hereditary neurodegenerative disorder develops significant metabolic abnormalities including copper deficiency and hypomyelination, and even death before 3 years old. However, the underlying mechanisms remain poorly understood. In this study, a dysfunction in axons as evidenced by the shortened axons, reduced branching in each axon, thinner spinal myelin sheaths, and a significant decrease in neuronal membrane potential, was manifested in the central nervous system (CNS) of atp7a−/− larvae. Atp7a is indispensable for the axonal survival in a cell-autonomous manner by fine-tuning copper homeostasis. The transcriptomics analysis identified a significant enrichment of ferroptosis among the differentially expressed genes (DEGs). Iron overload, GPX4 degradation, and lipid peroxidation, the fundamental characteristics of ferroptosis, were evident during atp7a ablation. More importantly, administration of ferroptosis inhibitor Fer-1 or iron chelator DFO, substantially suppressed ferroptosis and largely ameliorated axonal and myelin defects in atp7a−/− larvae. Whereas, larvae exposed to ferroptosis inducer RSL3, and engineered larvae developing ferroptosis, phenocopied the myelin and axonal extension defects observed in atp7a−/− mutants. Taken together, this study highlights the critical importance of atp7a in supporting axonal and myelin development during zebrafish embryogenesis by tightly restraining ferroptosis. This study will shed some light on the theoretical basis and therapeutic targets underlying ATP7A dysfunction induced neurodegenerative diseases.http://www.sciencedirect.com/science/article/pii/S0969996125002438ATP7AAxonMyelinFerroptosisGPX4 |
| spellingShingle | You Wu Jiahuan Li Wenya Zhai Wenye Liu Hao Wu Hong Liu Junxia Min Fudi Wang Jing-Xia Liu Atp7a deficiency induces axonal and myelin developmental defects in zebrafish via ferroptosis Neurobiology of Disease ATP7A Axon Myelin Ferroptosis GPX4 |
| title | Atp7a deficiency induces axonal and myelin developmental defects in zebrafish via ferroptosis |
| title_full | Atp7a deficiency induces axonal and myelin developmental defects in zebrafish via ferroptosis |
| title_fullStr | Atp7a deficiency induces axonal and myelin developmental defects in zebrafish via ferroptosis |
| title_full_unstemmed | Atp7a deficiency induces axonal and myelin developmental defects in zebrafish via ferroptosis |
| title_short | Atp7a deficiency induces axonal and myelin developmental defects in zebrafish via ferroptosis |
| title_sort | atp7a deficiency induces axonal and myelin developmental defects in zebrafish via ferroptosis |
| topic | ATP7A Axon Myelin Ferroptosis GPX4 |
| url | http://www.sciencedirect.com/science/article/pii/S0969996125002438 |
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