Mitochondrial DNA Manipulations Affect Tau Oligomerization
Weidling, Ian W.
Wilkins, Heather M.
Koppel, Scott J.
Menta, Blaise W.
Swerdlow, Russell H.
Scholarly/refereed, author accepted manuscript
Copyright 2020 The Author(s).
MetadataShow full item record
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.
Weidling, I. W., Wilkins, H. M., Koppel, S. J., Hutfles, L., Wang, X., Kalani, A., Menta, B. W., Ryan, B., Perez-Ortiz, J., Gamblin, T. C., & Swerdlow, R. H. (2020). Mitochondrial DNA Manipulations Affect Tau Oligomerization. Journal of Alzheimer's disease : JAD, 77(1), 149–163. https://doi.org/10.3233/JAD-200286
Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.