The effect of cavernous nerve traction on erectile function in rats

Area of Science:

• Urology
• Neuroscience
• Regenerative Medicine

Background:

• Erectile dysfunction (ED) can result from nerve damage.
• Cavernous nerve (CN) injury is a common cause of ED.
• Understanding the impact of different injury types is crucial for developing treatments.

Purpose of the Study:

• To evaluate the effects of cavernous nerve (CN) traction on erectile function in a rat model.
• To compare CN traction injury with CN crush injury.
• To investigate the underlying molecular and histological changes associated with CN traction.

Main Methods:

• Thirty-two rats were divided into control, 1-minute CN traction, 2-minute CN traction, and 2-minute CN crush groups.
• Erectile function was assessed by measuring intracavernosal pressure (ICP) and mean arterial pressure (MAP) after CN stimulation.
• Expression of neuronal nitric oxide synthase (nNOS), neurofilament, fibrosis, and apoptosis were analyzed in penile tissues and major pelvic ganglia (MPG).

Main Results:

• The ICP/MAP ratio significantly decreased in the 2-minute CN traction group compared to the control group.
• The CN crush group exhibited a more pronounced reduction in the ICP/MAP ratio than all other groups.
• CN traction led to decreased nNOS expression, reduced nerve fiber number, increased fibrosis, and elevated apoptosis in penile tissues.

Conclusions:

• Cavernous nerve (CN) traction serves as an effective model for inducing erectile dysfunction.
• CN traction causes milder injury compared to CN crush, evidenced by less severe functional and histological changes.
• The study highlights the detrimental effects of CN traction on erectile function and penile tissue integrity.