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Overview of voltage-dependent calcium channels
1Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, Ohio 44106, USA.
Journal of Bioenergetics and Biomembranes
|October 3, 1998
Summary
Voltage-dependent calcium channels link electrical signals to cellular functions in excitable cells. This review covers their properties, ion permeation, gating, and modulation by G proteins and second messengers.
Area of Science:
- Neuroscience
- Cellular Physiology
- Pharmacology
Background:
- Voltage-dependent calcium channels (VDCCs) are critical for cellular signaling in excitable cells.
- They mediate essential physiological processes like excitation-secretion and excitation-contraction coupling.
- Diverse VDCC types have been identified, differing in electrophysiological and molecular characteristics.
Purpose of the Study:
- To provide a comprehensive review of the fundamental properties of VDCCs.
- To elucidate the mechanisms underlying ion permeation and channel block.
- To discuss the gating kinetics and modulation of VDCCs by intracellular signaling pathways.
Main Methods:
- Literature review of electrophysiological and molecular studies on VDCCs.
- Analysis of existing data on ion channel function and regulation.
- Synthesis of information on channel properties and modulation.
Main Results:
- VDCCs exhibit distinct pharmacological and kinetic profiles.
- Mechanisms of ion permeation and block are key determinants of channel function.
- Gating kinetics and modulation by G proteins and second messengers significantly influence cellular responses.
Conclusions:
- VDCCs are fundamental to cellular excitability and function.
- Understanding their properties is crucial for comprehending cellular signaling.
- Further research into VDCC modulation may reveal therapeutic targets.