Mitochondrial DNA Manipulations Affect Tau Oligomerization
| Autor: | Anuradha Kalani, Lewis Hutfles, Blaise W. Menta, Ian Weidling, Russell H. Swerdlow, Heather M. Wilkins, Benjamin J. Ryan, Judit Perez-Ortiz, Xiaowan Wang, T. Chris Gamblin, Scott J. Koppel |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Mitochondrial DNA MtDNA depletion Cell tau Proteins Mitochondrion Cytoplasmic hybrid Oligomer DNA Mitochondrial Article Cohort Studies 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Cell Line Tumor Ethidium medicine Humans General Neuroscience Cell Cycle General Medicine Cell biology Mitochondria Psychiatry and Mental health Clinical Psychology 030104 developmental biology Cytochrome oxidase activity medicine.anatomical_structure chemistry Cell culture Geriatrics and Gerontology 030217 neurology & neurosurgery |
| Zdroj: | J Alzheimers Dis |
| Popis: | Background: Mitochondrial dysfunction and tau aggregation occur in Alzheimer’s disease (AD), and exposing cells or rodents to mitochondrial toxins alters their tau. Objective: To further explore how mitochondria influence tau, we measured tau oligomer levels in human neuronal SH-SY5Y cells with different mitochondrial DNA (mtDNA) manipulations. Methods: Specifically, we analyzed cells undergoing ethidium bromide-induced acute mtDNA depletion, ρ0 cells with chronic mtDNA depletion, and cytoplasmic hybrid (cybrid) cell lines containing mtDNA from AD subjects. Results: We found cytochrome oxidase activity was particularly sensitive to acute mtDNA depletion, evidence of metabolic re-programming in the ρ0 cells, and a relatively reduced mtDNA content in cybrids generated through AD subject mitochondrial transfer. In each case tau oligomer levels increased, and acutely depleted and AD cybrid cells also showed a monomer to oligomer shift. Conclusion: We conclude a cell’s mtDNA affects tau oligomerization. Overlapping tau changes across three mtDNA-manipulated models establishes the reproducibility of the phenomenon, and its presence in AD cybrids supports its AD-relevance. |
| Databáze: | OpenAIRE |
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