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The achilles heel in melatonin: asthma
Edibe Karasu-Minareci1, Yasemin Kaya, Fatos Belgin Yildirim
1Akdeniz University, School of Medicine, Pharmacology Department, Antalya, Turkey. dredibe@hotmail.com
Iranian Journal of Allergy, Asthma, and Immunology
|September 6, 2012
Summary
Melatonin supplementation may worsen nocturnal asthma symptoms by increasing airway smooth muscle contraction. Asthmatic patients using melatonin should be aware of potential negative effects on their condition.
Area of Science:
- Pharmacology
- Respiratory Medicine
- Sleep Science
Background:
- Asthma involves chronic airway inflammation and nocturnal symptoms, which are linked to mortality.
- Melatonin, known for circadian rhythm regulation, may also influence smooth muscle tone.
Purpose of the Study:
- To investigate the effect of melatonin on the contractile and relaxation responses of rat tracheal smooth muscle.
- To explore melatonin's potential role in the pathogenesis of nocturnal asthma.
Main Methods:
- Rats were administered melatonin (50mg/kg/day) for 6 weeks.
- In vitro organ bath experiments assessed tracheal smooth muscle responses to contractile and relaxant agents.
Main Results:
- Melatonin treatment significantly enhanced contraction responses in rat tracheal preparations.
- Melatonin did not alter the relaxation responses of the tracheal smooth muscle.
Conclusions:
- Melatonin may contribute to the development of nocturnal asthma symptoms by increasing airway smooth muscle contractility.
- Clinicians should consider melatonin's impact on nocturnal asthma exacerbations and advise patients on potential risks of exogenous supplementation.
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