Hypothermia-induced dystonia and abnormal cerebellar activity in a mouse model with a single disease-mutation in the sodium-potassium pump

Toke Jost Isaksen, Lieke Kros, Natascia Vedovato, Thomas Hellesøe Holm, Ariel Vitenzon, David C. Gadsby, Kamran Khodakhah, Karin Lykke-Hartmann

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Mutations in the neuron-specific α3isoform of the Na+/K+-ATPase are found in patients suffering from Rapid onset Dystonia Parkinsonism and Alternating Hemiplegia of Childhood, two closely related movement disorders. We show that mice harboring a heterozygous hot spot disease mutation, D801Y (α3 +/D801Y), suffer abrupt hypothermia-induced dystonia identified by electromyographic recordings. Single-neuron in vivo recordings in awake α3 +/D801Ymice revealed irregular firing of Purkinje cells and their synaptic targets, the deep cerebellar nuclei neurons, which was further exacerbated during dystonia and evolved into abnormal high-frequency burst-like firing. Biophysically, we show that the D-to-Y mutation abolished pump-mediated Na+/K+exchange, but allowed the pumps to bind Na+and become phosphorylated. These findings implicate aberrant cerebellar activity in α3isoform-related dystonia and add to the functional understanding of the scarce and severe mutations in the α3isoform Na+/K+-ATPase.

Original languageEnglish (US)
Article numbere1006763
JournalPLoS genetics
Volume13
Issue number5
DOIs
StatePublished - May 2017

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Molecular Biology
  • Genetics
  • Genetics(clinical)
  • Cancer Research

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