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Channelopathies in Cav1.1, Cav1.3, and Cav1.4 voltage-gated L-type Ca2+ channels

Jörg Striessnig1, Hanno Jörn Bolz, Alexandra Koschak

  • 1Pharmacology and Toxicology, Institute of Pharmacy, and Center for Molecular Biosciences, University of Innsbruck, Peter-Mayr-Strasse 1, 6020, Innsbruck, Austria. joerg.striessnig@uibk.ac.at

Pflugers Archiv : European Journal of Physiology
|March 10, 2010
PubMed

Insights

Genetic defects in L-type Ca2+ channels (LTCCs) cause various human diseases, including channelopathies affecting muscle and neurological functions. Understanding LTCCs offers insights into disease mechanisms and channel function.

Area of Science:

  • Molecular Biology
  • Neuroscience
  • Genetics

Background:

  • Voltage-gated Ca2+ channels (e.g., L-type Ca2+ channels or LTCCs) are crucial for cellular signaling.
  • LTCCs are sensitive to blockers and found in excitable tissues.
  • Genetic defects in these channels lead to human diseases known as channelopathies.

Purpose of the Study:

  • To review the role of LTCCs in human diseases caused by genetic defects.
  • To highlight how LTCC dysfunction contributes to specific channelopathies.
  • To explore insights gained into disease pathophysiology and channel function.

Main Methods:

  • Literature review of genetic Ca2+ channel defects.
  • Analysis of structural aberrations in LTCC alpha1 subunits.
  • Examination of disease phenotypes associated with LTCC mutations.

Main Results:

  • LTCC (Cav1) alpha1 subunit mutations cause hypokalemic periodic paralysis, malignant hyperthermia, congenital stationary night blindness (CSNB2), and Timothy syndrome.
  • Cav1.3 alpha1 mutations are not yet reported in humans but may impact heart and hearing.
  • LTCCs indirectly contribute to neurological symptoms in other Ca2+ channelopathies.

Conclusions:

  • LTCCs are implicated in a range of human channelopathies.
  • Studying Ca2+ channelopathies provides valuable molecular insights into disease and channel function.
  • Further research into LTCCs can illuminate disease mechanisms and potential therapeutic targets.

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