Go to The Journal of Clinical Investigation
  • About
  • Editors
  • Consulting Editors
  • For authors
  • Publication ethics
  • Transfers
  • Advertising
  • Job board
  • Contact
  • Current issue
  • Past issues
  • By specialty
    • COVID-19
    • Cardiology
    • Immunology
    • Metabolism
    • Nephrology
    • Oncology
    • Pulmonology
    • All ...
  • Videos
  • Collections
    • Resource and Technical Advances
    • Clinical Medicine
    • Reviews
    • Editorials
    • Perspectives
    • Top read articles
  • JCI This Month
    • Current issue
    • Past issues

  • Current issue
  • Past issues
  • Specialties
  • In-Press Preview
  • Concise Communication
  • Editorials
  • Viewpoint
  • Top read articles
  • About
  • Editors
  • Consulting Editors
  • For authors
  • Publication ethics
  • Transfers
  • Advertising
  • Job board
  • Contact
Regional variability and genotypic and pharmacodynamic effects on PrP concentration in the CNS
Meredith A. Mortberg, … , Sonia M. Vallabh, Eric Vallabh Minikel
Meredith A. Mortberg, … , Sonia M. Vallabh, Eric Vallabh Minikel
Published February 8, 2022
Citation Information: JCI Insight. 2022;7(6):e156532. https://doi.org/10.1172/jci.insight.156532.
View: Text | PDF
Research Article Neuroscience Therapeutics

Regional variability and genotypic and pharmacodynamic effects on PrP concentration in the CNS

  • Text
  • PDF
Abstract

Prion protein (PrP) concentration controls the kinetics of prion replication and is a genetically and pharmacologically validated therapeutic target for prion disease. In order to evaluate PrP concentration as a pharmacodynamic biomarker and assess its contribution to known prion disease risk factors, we developed and validated a plate-based immunoassay reactive for PrP across 6 species of interest and applicable to brain and cerebrospinal fluid (CSF). PrP concentration varied dramatically across different brain regions in mice, cynomolgus macaques, and humans. PrP expression did not appear to contribute to the known risk factors of age, sex, or common PRNP genetic variants. CSF PrP was lowered in the presence of rare pathogenic PRNP variants, with heterozygous carriers of P102L displaying 55%, and D178N just 31%, of the CSF PrP concentration of mutation-negative controls. In rodents, pharmacologic reduction of brain Prnp RNA was reflected in brain parenchyma PrP and, in turn in CSF PrP, validating CSF as a sampling compartment for the effect of PrP-lowering therapy. Our findings support the use of CSF PrP as a pharmacodynamic biomarker for PrP-lowering drugs and suggest that relative reduction from individual baseline CSF PrP concentration may be an appropriate marker for target engagement.

Authors

Meredith A. Mortberg, Hien T. Zhao, Andrew G. Reidenbach, Juliana E. Gentile, Eric Kuhn, Jill O’Moore, Patrick M. Dooley, Theresa R. Connors, Curt Mazur, Shona W. Allen, Bianca A. Trombetta, Alison McManus, Matthew R. Moore, Jiewu Liu, Deborah E. Cabin, Holly B. Kordasiewicz, Joel Mathews, Steven E. Arnold, Sonia M. Vallabh, Eric Vallabh Minikel

×

Full Text PDF | Download (3.28 MB)


Copyright © 2022 American Society for Clinical Investigation
ISSN 2379-3708

Sign up for email alerts