Melatonin and Its Role in Lower Urinary Tract Function: An Article Review.

Area of Science:

• Pharmacology
• Urology
• Neuroscience

Background:

• Melatonin is a hormone with known antioxidant and anti-inflammatory properties.
• Bladder function is complex, involving smooth muscle contractility and neurological control.
• Oxidative stress and inflammation are implicated in bladder dysfunction.

Purpose of the Study:

• To review animal studies on the effects of melatonin on bladder function.
• To elucidate the mechanisms by which melatonin influences bladder contractility and inflammation.

Main Methods:

• Review of existing animal research investigating melatonin's impact on bladder smooth muscle.
• Analysis of studies examining melatonin's effects on contractile responses to various agonists.
• Examination of melatonin's influence on oxidative stress markers and inflammatory pathways in the bladder.

Main Results:

• Melatonin pre-treatment dose-dependently decreased contractile responses to phenylephrine, acetylcholine, bethanechol, and KCl.
• Melatonin inhibited responses to direct calcium channel openers and interfered with calmodulin-myosin light-chain kinase pathways.
• Melatonin demonstrated antioxidant effects by reducing malondialdehyde and myeloperoxidase, and increasing glutathione levels.
• Melatonin treatment attenuated cystitis severity, reduced mast cell activation, and decreased pro-inflammatory cytokine expression.

Conclusions:

• Melatonin modulates bladder contractility through direct effects on smooth muscle, ion channels, and potentially the GABAA receptor.
• Melatonin's antioxidant and anti-inflammatory actions contribute to its protective effects against bladder dysfunction and cystitis.
• Melatonin shows potential for managing age-related bladder issues and inflammatory bladder conditions.