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Determination of the Relative Cell Surface and Total Expression of Recombinant Ion Channels Using Flow Cytometry
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Published on: September 28, 2016

CaV2.1 channelopathies.

Daniela Pietrobon1

  • 1Department of Biomedical Sciences, University of Padova, 35121, Padua, Italy. daniela.pietrobon@unipd.it

Pflugers Archiv : European Journal of Physiology
|March 6, 2010
PubMed
Summary

Mutations in the CACNA1A gene cause neurologic disorders like FHM1 and ataxia. This review details disease phenotypes and functional impacts of these CACNA1A gene mutations on CaV2.1 channels.

Area of Science:

  • Neuroscience
  • Genetics
  • Channelopathies

Background:

  • Mutations in the CACNA1A gene lead to autosomal-dominant neurologic disorders.
  • These include familial hemiplegic migraine type 1 (FHM1), episodic ataxia type 2, and spinocerebellar ataxia type 6 (SCA6).
  • The CACNA1A gene encodes the alpha1 subunit of CaV2.1 (P/Q-type) Ca2+ channels.

Purpose of the Study:

  • To review disease phenotypes associated with CACNA1A mutations.
  • To describe functional consequences of these mutations on CaV2.1 channels.
  • To discuss implications for disease mechanisms and cerebellar function.

Main Methods:

  • Analysis of disease phenotypes in patients.
  • Functional characterization of recombinant human CaV2.1 channels with mutations.

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  • Study of knockin mouse models expressing mutant CaV2.1 channels at physiological levels.
  • Investigation of spontaneous cacna1a mouse mutants.

    • Main Results:

    • Detailed description of disease phenotypes for FHM1, episodic ataxia type 2, and SCA6.
    • Elucidation of functional consequences of mutations on CaV2.1 channels, both recombinant and endogenous.
    • Insights into the role of CaV2.1 dysfunction in cortical spreading depression and synaptic transmission.
    • Characterization of cerebellar mechanisms underlying motor dysfunction in ataxic mouse mutants.

    Conclusions:

    • CACNA1A gene mutations result in diverse channelopathies with distinct neurological manifestations.
    • Understanding the functional impact of these mutations on CaV2.1 channels is crucial for elucidating disease mechanisms.
    • Mouse models provide valuable insights into the pathophysiology of these genetic neurological disorders.