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CACNA1C-Related Channelopathies.

Kevin G Herold1, John W Hussey1, Ivy E Dick2

  • 1Department of Physiology, University of Maryland School of Medicine, Baltimore, MD, USA.

Handbook of Experimental Pharmacology
|January 4, 2023
PubMed
Summary

Genetic mutations in the CACNA1C gene disrupt CaV1.2 calcium channels, impacting heart and brain function. These CACNA1C channelopathies cause a spectrum of disorders, from severe Timothy syndrome to more selective cardiac or neurological conditions.

Keywords:
CACNA1CCaV1.2ChannelopathyL-type calcium channelTimothy syndrome

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Area of Science:

  • Genetics
  • Molecular Biology
  • Physiology

Background:

  • The CACNA1C gene encodes the CaV1.2 L-type calcium channel, crucial for cellular functions in the heart, brain, and immune system.
  • Mutations in CACNA1C can lead to severe multisystem disorders like Timothy syndrome, characterized by developmental, cardiac, craniofacial, and immune issues.

Approach:

  • This review synthesizes current knowledge on CACNA1C mutations and their effects on CaV1.2 channel function.
  • We examine the expanding spectrum of phenotypes associated with CACNA1C channelopathies, including multisystem and selective presentations.

Key Points:

  • CACNA1C mutations alter CaV1.2 channel function, leading to diverse physiological consequences.
  • The spectrum of CACNA1C channelopathies ranges from severe multisystem disorders to phenotypes with predominantly cardiac or neurological symptoms.
  • Understanding these mutations is vital for diagnosing and potentially treating associated conditions.

Conclusions:

  • Genetic variations in CACNA1C significantly impact CaV1.2 channel activity and cellular physiology.
  • CACNA1C channelopathies represent a growing area of research with implications for cardiovascular and neurological health.
  • Further research into CACNA1C mutations will refine our understanding of channel function and disease mechanisms.