Stem Cell Reports (Nov 2018)

Mitochondrial Dysregulation and Impaired Autophagy in iPSC-Derived Dopaminergic Neurons of Multiple System Atrophy

  • Giacomo Monzio Compagnoni,
  • Giulio Kleiner,
  • Maura Samarani,
  • Massimo Aureli,
  • Gaia Faustini,
  • Arianna Bellucci,
  • Dario Ronchi,
  • Andreina Bordoni,
  • Manuela Garbellini,
  • Sabrina Salani,
  • Francesco Fortunato,
  • Emanuele Frattini,
  • Elena Abati,
  • Christian Bergamini,
  • Romana Fato,
  • Silvia Tabano,
  • Monica Miozzo,
  • Giulia Serratto,
  • Maria Passafaro,
  • Michela Deleidi,
  • Rosamaria Silipigni,
  • Monica Nizzardo,
  • Nereo Bresolin,
  • Giacomo P. Comi,
  • Stefania Corti,
  • Catarina M. Quinzii,
  • Alessio Di Fonzo

Journal volume & issue
Vol. 11, no. 5
pp. 1185 – 1198

Abstract

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Summary: Multiple system atrophy (MSA) is a progressive neurodegenerative disease that affects several areas of the CNS, whose pathogenesis is still widely unclear and for which an effective treatment is lacking. We have generated induced pluripotent stem cell-derived dopaminergic neurons from four MSA patients and four healthy controls and from two monozygotic twins discordant for the disease. In this model, we have demonstrated an aberrant autophagic flow and a mitochondrial dysregulation involving respiratory chain activity, mitochondrial content, and CoQ10 biosynthesis. These defective mechanisms may contribute to the onset of the disease, representing potential therapeutic targets. : Monzio Compagnoni et al. present an iPSC-based neuronal in vitro model of multiple system atrophy. Patients' dopaminergic neurons display a dysregulation of mitochondrial functioning and autophagy, suggesting new hints for the comprehension of the pathogenesis of the disease. Keywords: multiple system atrophy, induced pluripotent stem cells, dopaminergic neurons, mitochondria, autophagy, MSA, neurodegeneration