Identification of plasma proteins relating to brain neurodegeneration and vascular pathology in cognitively normal individuals

  • Liu Shi (Lead / Corresponding author)
  • , Colin Buchanan
  • , Simon R. Cox
  • , Robert F. Hillary
  • , Riccardo E. Marioni
  • , Archie Campbell
  • , Caroline Hayward
  • , Aleks Stolicyn
  • , Heather C. Whalley
  • , Jennifer M. J. Waymont
  • , Gordon D. Waiter
  • , Ellen V . Backhouse
  • , Douglas Steele
  • , Andrew Mcintosh
  • , Simon Lovestone
  • , Noel J. Buckley
  • , Alejo J. Nevado-Holgado

    Research output: Contribution to journalArticlepeer-review

    164 Downloads (Pure)

    Abstract

    Introduction: This study aims to first discover plasma proteomic biomarkers relating to neurodegeneration (N) and vascular (V) damage in pre-clinical Alzheimer’s disease (AD) and second to discover proteins mediating sex related difference in N and V pathology.

    Methods: 5033 plasma proteins were measured in 1061 cognitively normal individuals (628 female and 433 male), nearly 90% of whom had magnetic resonance imaging (MRI) measures of hippocampus volume (as N) and white matter hyperintensities (as V).

    Results: Protein differential analysis and co-expression network analysis revealed several proteins and modules associated with N and V respectively and such associations were affected by sex. Furthermore, four proteins mediated sex-related difference in neurodegeneration and one protein mediated such difference in vascular damage.

    Discussion: The identified proteins could help to select cognitively normal individuals with N and V pathology for AD clinical trials and provide tractable targets for further mechanistic studies, leading to sex-specific therapeutic strategies
    Original languageEnglish
    Article numbere12240
    Number of pages12
    JournalAlzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
    Volume13
    Issue number1
    Early online date1 Sept 2021
    DOIs
    Publication statusPublished - 2021

    Keywords

    • plasma proteomics
    • neurodegeneration
    • vascular damage
    • sex-related difference
    • mediation

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