Melatonin Improves Erectile Function in Rats With Chronic Lower Body Ischemia

Area of Science:

• Biomedical Science
• Pharmacology
• Urology

Background:

• Arterial occlusive disease is a primary cause of erectile dysfunction (ED).
• Atherosclerosis-induced chronic ischemia significantly impacts penile structures and erectile function.
• A rat model is utilized to study these effects.

Purpose of the Study:

• To investigate the therapeutic potential of melatonin in mitigating ED.
• To characterize the effects of melatonin on penile tissue and erectile function in an ischemic model.

Main Methods:

• Adult male Sprague-Dawley rats were divided into control, arterial injury (AI), and AI with melatonin treatment groups.
• Endothelial injury and a high-cholesterol diet were induced in AI groups for 8 weeks.
• Melatonin (20 mg/kg/day) was administered orally to the AI-melatonin group.

Main Results:

• Melatonin treatment restored erectile responses to levels comparable to controls.
• Penile tissue analysis revealed reduced collagen and normalized eNOS/nNOS expression with melatonin.
• Melatonin partially improved sodium nitroprusside-induced relaxation and significantly improved electrical field stimulation-elicited relaxation.

Conclusions:

• Melatonin treatment effectively reduced or prevented functional and morphological changes in penile tissue caused by chronic ischemia.
• Melatonin demonstrates potential as a therapeutic agent for erectile dysfunction associated with arterial occlusive disease.