Conserved brain myelination networks are altered in Alzheimer's and other neurodegenerative diseases

Mariet Allen, Xue Wang, Jeremy D. Burgess, Jens Watzlawik, Daniel J. Serie, Curtis S. Younkin, Thuy Nguyen, Kimberly G. Malphrus, Sarah Lincoln, Minerva M. Carrasquillo, Charlotte Ho, Paramita Chakrabarty, Samantha Strickland, Melissa E. Murray, Vivek Swarup, Daniel H. Geschwind, Nicholas T. Seyfried, Eric B. Dammer, James J. Lah, Allan I. LeveyTodd E. Golde, Cory Funk, Hongdong Li, Nathan D. Price, Ronald C. Petersen, Neill R. Graff-Radford, Steven G. Younkin, Dennis W. Dickson, Julia R. Crook, Yan W. Asmann, Nilüfer Ertekin-Taner

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Introduction: Comparative transcriptome analyses in Alzheimer's disease (AD) and other neurodegenerative proteinopathies can uncover both shared and distinct disease pathways. Methods: We analyzed 940 brain transcriptomes including patients with AD, progressive supranuclear palsy (PSP; a primary tauopathy), and control subjects. Results: We identified transcriptional coexpression networks implicated in myelination, which were lower in PSP temporal cortex (TCX) compared with AD. Some of these associations were retained even after adjustments for brain cell population changes. These TCX myelination network structures were preserved in cerebellum but they were not differentially expressed in cerebellum between AD and PSP. Myelination networks were downregulated in both AD and PSP, when compared with control TCX samples. Discussion: Downregulation of myelination networks may underlie both PSP and AD pathophysiology, but may be more pronounced in PSP. These data also highlight conservation of transcriptional networks across brain regions and the influence of cell type changes on these networks.

Original languageEnglish (US)
Pages (from-to)352-366
Number of pages15
JournalAlzheimer's and Dementia
Volume14
Issue number3
DOIs
StatePublished - Mar 2018

Keywords

  • Alzheimer's disease
  • Cerebellum
  • Coexpression networks
  • Myelination
  • Progressive supranuclear palsy
  • Proteinopathies
  • Temporal cortex
  • Transcriptome

ASJC Scopus subject areas

  • Epidemiology
  • Health Policy
  • Developmental Neuroscience
  • Clinical Neurology
  • Geriatrics and Gerontology
  • Psychiatry and Mental health
  • Cellular and Molecular Neuroscience

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