Associations of mitochondrial genomic variation with corticobasal degeneration, progressive supranuclear palsy, and neuropathological tau measures

Rebecca R. Valentino, Nikoleta Tamvaka, Michael G. Heckman, Patrick W. Johnson, Alexandra I. Soto-Beasley, Ronald L. Walton, Shunsuke Koga, Ryan J. Uitti, Zbigniew K. Wszolek, Dennis W. Dickson, Owen A. Ross

Research output: Contribution to journalArticlepeer-review

Abstract

Mitochondrial health is important in ageing and dysfunctional oxidative phosphorylation (OXPHOS) accelerates ageing and influences neurodegeneration. Mitochondrial DNA (mtDNA) codes for vital OXPHOS subunits and mtDNA background has been associated with neurodegeneration; however, no study has characterised mtDNA variation in Progressive supranuclear palsy (PSP) or Corticobasal degeneration (CBD) risk or pathogenesis. In this case-control study, 910 (42.6% male) neurologically-healthy controls, 1042 (54.1% male) pathologically-confirmed PSP cases, and 171 (52.0% male) pathologically-confirmed CBD cases were assessed to determine how stable mtDNA polymorphisms, in the form of mtDNA haplogroups, were associated with risk of PSP, risk of CBD, age of PSP onset, PSP disease duration, and neuropathological tau pathology measures for neurofibrillary tangles (NFT), neuropil threads (NT), tufted astrocytes (TA), astrocytic plaques (AP), and oligodendroglial coiled bodies (CB). 764 PSP cases and 150 CBD cases had quantitative tau pathology scores. mtDNA was genotyped for 39 unique SNPs using Agena Bioscience iPlex technologies and mitochondrial haplogroups were defined to mitochondrial phylogeny. After adjustment for multiple testing, we observed an association with risk of CBD for mtDNA sub-haplogroup H4 (OR = 4.51, P = 0.001) and the HV/HV0a haplogroup was associated with a decreased severity of NT tau pathology in PSP cases (P = 0.0023). Our study reports that mitochondrial genomic background may be associated with risk of CBD and may be influencing tau pathology measures in PSP. Replication of these findings will be important.

Original languageEnglish (US)
Article number162
JournalActa Neuropathologica Communications
Volume8
Issue number1
DOIs
StatePublished - Sep 17 2020

Keywords

  • Corticobasal degeneration
  • Mitochondrial haplogroups
  • Neuropathology
  • Progressive supranuclear palsy
  • Tauopathy
  • mtDNA

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Clinical Neurology
  • Cellular and Molecular Neuroscience

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