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(-)-Carvone: antispasmodic effect and mode of action
Fábia Valéria M Souza1, Marcelly Barbosa da Rocha, Damião P de Souza
1Physiology Department, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil.
Fitoterapia
|October 30, 2012
Summary
(-)-Carvone, found in spearmint oil, acts as a potent calcium channel blocker (CCB) in the gut. This mechanism explains its intestinal antispasmodic effects, offering a new understanding of its therapeutic potential.
Area of Science:
- Pharmacology
- Gastroenterology
- Natural Products Chemistry
Background:
- (-)-Carvone, a monoterpene ketone from spearmint oil, is used as a flavor and fragrance additive.
- Previous studies indicated an intestinal antispasmodic effect for (-)-carvone, surpassing its enantiomer.
- The precise mechanism underlying (-)-carvone's antispasmodic action remained unelucidated.
Purpose of the Study:
- To investigate the pharmacological mechanism of (-)-carvone's antispasmodic effect in the gastrointestinal tract.
- To compare the action of (-)-carvone with a known calcium channel blocker (CCB), verapamil.
- To elucidate the potential role of CCB-like activity in (-)-carvone's effects.
Main Methods:
- Isolated guinea pig ileum preparations were used for isotonic contraction recordings.
- The effects of (-)-carvone on various contractile stimuli (histamine, BaCl2, carbachol, high K+) were assessed.
- (-)-Carvone's actions were compared to verapamil, a classical CCB.
Main Results:
- (-)-Carvone demonstrated potent inhibition of contractions induced by histamine, BaCl2, and carbachol.
- It significantly reduced high K+-induced contractions, indicating a calcium channel blocking (CCB) action.
- (-)-Carvone was approximately 100 times more potent than verapamil in reducing high K+-induced contractions.
- No additive effect was observed when (-)-carvone was combined with verapamil.
Conclusions:
- (-)-Carvone exhibits a potent and typical calcium channel blocker (CCB)-like activity in the intestinal smooth muscle.
- This CCB-like action likely underlies the observed antispasmodic effects of (-)-carvone and spearmint oil.
- The findings provide a pharmacological basis for the traditional and therapeutic uses of spearmint oil components.
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