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Intracavernosal Pressure Recording to Evaluate Erectile Function in Rodents
Published on: June 6, 2018
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Intracavernosal OnabotulinumtoxinA Exerts a Synergistic Pro-Erectile Effect When Combined With Sildenafil in
Francois Giuliano1, Charles Joussain1, Pierre Denys1
1Neuro-Uro-Andrology Department, Raymond Poincare University Hospital, Garches, France; Faculty of Medicine, Versailles Saint Quentin University, Montigny le Bretonneux, Paris Saclay, France.
The Journal of Sexual Medicine
|April 2, 2022
Summary
Intracavernosal onabotulinumtoxinA combined with sildenafil significantly enhances erectile function in rats. This combination therapy shows promise for treating difficult erectile dysfunction (ED).
Area of Science:
- Pharmacology
- Urology
- Reproductive Medicine
Background:
- Botulinum toxin A (BTX-A) is used in medicine.
- Intracavernosal (ic) BTX-A may treat erectile dysfunction (ED) in patients unresponsive to PDE5 inhibitors.
Purpose of the Study:
- To provide experimental evidence for using onabotulinumtoxinA ic alone or with PDE5 inhibitors for difficult ED.
- To compare BTX-A ic alone, BTX-A ic with PDE5-I, and placebo treatments.
Main Methods:
- Evaluated erectile function in spontaneously hypertensive rats (a model for vascular ED).
- Administered onabotulinumtoxinA 10U or saline ic, and sildenafil or saline iv.
- Compared frequency-response curves using 2-way ANOVA.
Main Results:
- Both onabotulinumtoxinA ic and sildenafil iv improved erectile responses individually.
- The combination of onabotulinumtoxinA ic and sildenafil iv significantly amplified erectile responses.
- Combined treatment increased erectile response by 58% compared to 15% for BTX-A and 19% for sildenafil alone.
Conclusions:
- Data support a pharmacological rationale for combining onabotulinumtoxinA ic and sildenafil iv.
- Suggests further research into BTX-A's pro-erectile mechanisms and clinical trials for difficult ED.
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