Molecular markers of early Parkinson's disease based on gene expression in blood.

Journal Article

Parkinson's disease (PD) progresses relentlessly and affects five million people worldwide. Laboratory tests for PD are critically needed for developing treatments designed to slow or prevent progression of the disease. We performed a transcriptome-wide scan in 105 individuals to interrogate the molecular processes perturbed in cellular blood of patients with early-stage PD. The molecular multigene marker here identified is associated with risk of PD in 66 samples of the training set comprising healthy and disease controls [third tertile cross-validated odds ratio of 5.7 (P for trend 0.005)]. It is further validated in 39 independent test samples [third tertile odds ratio of 5.1 (P for trend 0.04)]. Insights into disease-linked processes detectable in peripheral blood are offered by 22 unique genes differentially expressed in patients with PD versus healthy individuals. These include the co-chaperone ST13, which stabilizes heat-shock protein 70, a modifier of alpha-synuclein misfolding and toxicity. ST13 messenger RNA copies are lower in patients with PD (mean +/- SE 0.59 +/- 0.05) than in controls (0.96 +/- 0.09) (P = 0.002) in two independent populations. Thus, gene expression signals measured in blood can facilitate the development of biomarkers for PD.

Full Text

Duke Authors

Cited Authors

  • Scherzer, CR; Eklund, AC; Morse, LJ; Liao, Z; Locascio, JJ; Fefer, D; Schwarzschild, MA; Schlossmacher, MG; Hauser, MA; Vance, JM; Sudarsky, LR; Standaert, DG; Growdon, JH; Jensen, RV; Gullans, SR

Published Date

  • January 16, 2007

Published In

Volume / Issue

  • 104 / 3

Start / End Page

  • 955 - 960

PubMed ID

  • 17215369

International Standard Serial Number (ISSN)

  • 0027-8424

Digital Object Identifier (DOI)

  • 10.1073/pnas.0610204104

Language

  • eng

Conference Location

  • United States