Evaluation of erectile function in laboratory animals: an overview

Area of Science:

• Urology
• Andrology
• Animal Models

Background:

• Erectile dysfunction (ED) significantly impacts male quality of life.
• Understanding ED mechanisms is limited by human-animal physiological differences.
• Objective assessment methods in animal models are crucial for translational research.

Purpose of the Study:

• To explore various experimental approaches for evaluating erectile function in rodent models.
• To bridge the translational gap between animal models and human physiology in ED research.

Main Methods:

• Systematic literature search of PubMed and Medline for original research on erectile function evaluation in experimental animals.
• Inclusion of studies with detailed erectile assessment methods and exclusion of non-English articles, editorials, and commentaries.

Main Results:

• The ICP-to-mean arterial pressure ratio remains a key indicator.
• Advanced technologies like laser speckle, infrared thermal imaging, microscopic ultrasound, and MRI offer detailed hemodynamic and histological insights.
• Wearable adaptive penile rigidity monitoring (WARM) provides non-invasive, dynamic assessment.
• Ex vivo tissue models aid in understanding ED mechanisms and drug efficacy.

Conclusions:

• This review synthesizes diverse methods, including novel technologies, for assessing rodent erectile function.
• Addressing methodological limitations provides a framework for accurate ED evaluations.
• This research supports further investigation into ED pathophysiology and therapeutic interventions.