The effect of botulinum toxin on ureteral inflammation.
World J Urol
; 39(6): 2197-2204, 2021 Jun.
Article
in En
| MEDLINE
| ID: mdl-32696129
ABSTRACT
PURPOSE:
The impact of onabotulinum toxin type A (BoNT-A) on bladder afferent nerve pathways and chemosensory functions is an active area of investigation. There may be a role for BoNT-A in disorders of the ureter; however, no histologic studies have assessed the effects of BoNT-A on ureteral tissue. Our objective was to develop an animal model of ureteral inflammation and determine the impact of ureteral BoNT-A instillation on known mechanisms of inflammation.METHODS:
The safety and feasibility of a novel animal model of ureteral inflammation was assessed. Through open cystotomy, the effect of ureteral BoNT-A instillation on inflammation was determined through H&E, masson's trichrome, Ki-67 stain, and prostaglandin E (PGE) synthase expression, a known marker of pain and inflammation in ureteral tissue. Urothelial microstructure was assessed using electron microscopy and standard histologic techniques.RESULTS:
All experiments were carried to completion, and no systemic signs of botulinum toxicity were seen. BoNT-A exposure was associated with a decrease in PGE synthase expression in a dose-dependent fashion. BoNT-A exposure was not found to impact collagen deposition or cell proliferation. Disruption of tight junctions between urothelial cells was observed under conditions of inflammation.CONCLUSION:
We describe the feasibility of a novel in vivo model of ureteral inflammation and report the first histologic study of the effects of BoNT-A on the ureter. Preliminary findings show that BoNT-A attenuates ureteral PGE synthase expression under conditions of inflammation. The application of BoNT-A may provide anti-inflammatory and analgesic effects in the context of ureteral disorders.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Ureteral Diseases
/
Botulinum Toxins, Type A
/
Acetylcholine Release Inhibitors
/
Inflammation
Type of study:
Prognostic_studies
Limits:
Animals
Language:
En
Journal:
World J Urol
Year:
2021
Document type:
Article
Affiliation country:
United States