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The mitochondrial K(ATP) channel and cardioprotection
James D McCully1, Sidney Levitsky
1Division of Cardiothoracic Surgery, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02115, USA. jamesmccully@hms.harvard.edu
The Annals of Thoracic Surgery
|February 28, 2003
Summary
Adenosine triphosphate (ATP)-sensitive potassium (K(ATP)) channels link cell energy to electrical activity. These cardiac channels, especially mitochondrial subtypes, are crucial for surgical cardioprotection, acting as both triggers and effectors.
Area of Science:
- Cardiovascular Physiology
- Cellular Electrophysiology
- Mitochondrial Biology
Background:
- Adenosine triphosphate (ATP)-sensitive potassium (K(ATP)) channels couple cellular metabolic state to membrane potential.
- Two K(ATP) channel subtypes exist in the myocardium: sarcolemmal (sarcK(ATP)) and mitochondrial (mitoK(ATP)).
Purpose of the Study:
- To review the biochemistry and surgical specificity of cardiac K(ATP) channels.
- To highlight the role of K(ATP) channels in surgical cardioprotection.
Main Methods:
- Literature review focusing on K(ATP) channel function and pharmacology.
- Examination of evidence for K(ATP) channel involvement in cardioprotection.
Main Results:
- K(ATP) channels are pharmacologically modulated by potassium channel openers and blockers.
- Mitochondrial K(ATP) channels (mitoK(ATP)) are significant triggers and effectors in surgical cardioprotection.
Conclusions:
- K(ATP) channels, particularly mitoK(ATP), are vital for surgical cardioprotection.
- Understanding K(ATP) channel biochemistry and specificity is key to optimizing cardioprotective strategies.