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PRRT2-dependent dyskinesia: cerebellar, paroxysmal and persistent

Lieke Kros1, Chris I De Zeeuw1,2

  • 1Department of Neuroscience, Erasmus MC Rotterdam, the Netherlands.

Cell Research
|November 18, 2017
PubMed

Insights

Ablation of the proline-rich transmembrane protein 2 (PRRT2) in cerebellar granule cells causes paroxysmal kinesigenic dyskinesia. PRRT2 regulates the presynaptic SNARE complex, impacting Purkinje cell activity.

Area of Science:

  • Neuroscience
  • Genetics
  • Cell Biology

Background:

  • Paroxysmal kinesigenic dyskinesia (PKD) is a movement disorder characterized by sudden, involuntary movements.
  • The genetic basis and cellular mechanisms underlying PKD are not fully understood.
  • The proline-rich transmembrane protein 2 (PRRT2) has been implicated in neurological disorders.

Purpose of the Study:

  • To investigate the role of PRRT2 in cerebellar function.
  • To determine if PRRT2 deficiency in specific cerebellar cells can induce PKD-like phenotypes.
  • To elucidate the molecular mechanisms by which PRRT2 influences neuronal activity.

Main Methods:

  • Genetic ablation of PRRT2 in cerebellar granule cells of model organisms.
  • Electrophysiological recordings of Purkinje cell activity.
  • Analysis of the presynaptic SNARE complex in granule cell axons.

Main Results:

  • Ablation of PRRT2 in cerebellar granule cells was sufficient to induce paroxysmal kinesigenic dyskinesia.
  • PRRT2 was found to downregulate the presynaptic SNARE complex in granule cell axons.
  • Altered SNARE complex function led to changes in Purkinje cell activity patterns.

Conclusions:

  • PRRT2 plays a critical role in regulating cerebellar circuitry and motor control.
  • Dysregulation of the presynaptic SNARE complex by PRRT2 deficiency is a key mechanism in PKD.
  • Targeting PRRT2 may offer therapeutic strategies for movement disorders like PKD.

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