Platelet mitochondrial membrane potential in Parkinson's disease

Paul M.A. Antony*, Olga Boyd, Christophe Trefois, Wim Ammerlaan, Marek Ostaszewski, Aidos S. Baumuratov, Laura Longhino, Laurent Antunes, Werner Koopman, Rudi Balling, Nico J. Diederich

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

7 Citations (Scopus)

Abstract

Objective: Mitochondrial dysfunction is a hallmark of idiopathic Parkinson's disease (IPD), which has been reported not to be restricted to striatal neurons. However, studies that analyzed mitochondrial function at the level of selected enzymatic activities in peripheral tissues have produced conflicting data. We considered the electron transport chain as a complex system with mitochondrial membrane potential as an integrative indicator for mitochondrial fitness. Methods: Twenty-five IPD patients (nine females; mean disease duration, 6.2 years) and 16 healthy age-matched controls (12 females) were recruited. Live platelets were purified using magnetic-activated cell sorting (MACS) and single-cell data on mitochondrial membrane potential ((increment)ψ) were measured by cytometry and challenged with a protonophore agent. Results: Functional mitochondrial membrane potential was detected in all participants. The challenge test reduced the membrane potential in all IPD patients and controls (P < 0.001). However, the response to the challenge was not significantly different between patients and controls. Interpretation: While the reported protonophore challenge assay is a valid marker of overall mitochondrial function in live platelets, intact mitochondrial membrane potential in platelets derived from IPD patients suggests that presumed mitochondrial enzymatic deficiencies are compensable in this cell type. In consequence, mitochondrial membrane potential in platelets cannot be used as a diagnostic biomarker for nonstratified IPD but should be further explored in potential Parkinson's disease subtypes and tissues with higher energy demands.

Original languageEnglish
Pages (from-to)67-73
Number of pages7
JournalAnnals of Clinical and Translational Neurology
Volume2
Issue number1
DOIs
Publication statusPublished - 1 Jan 2015

Fingerprint

Dive into the research topics of 'Platelet mitochondrial membrane potential in Parkinson's disease'. Together they form a unique fingerprint.

Cite this