Calcium dysregulation combined with mitochondrial failure and electrophysiological maturity converge in Parkinson’s iPSC-dopamine neurons

Beccano-Kelly, Dayne A. ORCID: https://orcid.org/0000-0003-3592-8354, Cherubini, Marta, Mousba, Yassine, Cramb, Kaitlyn M.L., Giussani, Stefania, Caiazza, Maria Claudia, Rai, Pavandeep, Vingill, Siv, Bengoa-Vergniory, Nora, Ng, Bryan, Corda, Gabriele, Banerjee, Abhirup, Vowles, Jane, Cowley, Sally and Wade-Martins, Richard 2023. Calcium dysregulation combined with mitochondrial failure and electrophysiological maturity converge in Parkinson’s iPSC-dopamine neurons. iScience 26 (7) , 107044. 10.1016/j.isci.2023.107044

PDF - Published Version Available under License Creative Commons Attribution. Download (438kB)

Abstract

Parkinson’s disease (PD) is characterized by a progressive deterioration of motor and cognitive functions. Although death of dopamine neurons is the hallmark pathology of PD, this is a late-stage disease process preceded by neuronal dysfunction. Here we describe early physiological perturbations in patient-derived induced pluripotent stem cell (iPSC)-dopamine neurons carrying the GBA-N370S mutation, a strong genetic risk factor for PD. GBA-N370S iPSC-dopamine neurons show an early and persistent calcium dysregulation notably at the mitochondria, followed by reduced mitochondrial membrane potential and oxygen consumption rate, indicating mitochondrial failure. With increased neuronal maturity, we observed decreased synaptic function in PD iPSC-dopamine neurons, consistent with the requirement for ATP and calcium to support the increase in electrophysiological activity over time. Our work demonstrates that calcium dyshomeostasis and mitochondrial failure impair the higher electrophysiological activity of mature neurons and may underlie the vulnerability of dopamine neurons in PD.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Medicine MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Publisher:	Cell Press
ISSN:	2589-0042
Date of First Compliant Deposit:	1 August 2023
Date of Acceptance:	16 April 2023
Last Modified:	03 Aug 2023 07:42
URI:	https://orca.cardiff.ac.uk/id/eprint/161399

Actions (repository staff only)

Edit Item