Abstract | PURPOSE: Recently we (1994) reported the photo-induced adequate nitric oxide (PIANO) system, in which an NO- or NO2-carrying molecule which has been photoactivated to release NO, could be exploited to investigate the role of NO in various smooth muscle functions. This study was designed to characterize the effect of nitric oxide (NO) exploiting PIANO on rat detrusor relaxation by isometric tension recording and measuring changes in cGMP content. MATERIALS AND METHODS: RESULTS: Rat detrusor strips were reversibly relaxed upon NO generation via PIANO. Pyrogallol, an O2 generator, significantly (p < 0.01) diminished PIANO-mediated relaxation. During PIANO-mediated relaxation, the tissue level of cyclic GMP significantly (p < 0.05) increased over that of the control. Furthermore, methylene blue, a guanylate cyclase inhibitor, significantly (p < 0.01) inhibited both the relaxation and the increase of cGMP. CONCLUSION: We concluded that rat detrusor muscle was capable of responding to NO, and these findings might lead to a treatment for bladder instability and detrusor hyperreflexia, by the use of intravesical instillation of NO donors.
|
Authors | B H Chung, S K Choi, K C Chang |
Journal | The Journal of urology
(J Urol)
Vol. 155
Issue 6
Pg. 2090-3
(Jun 1996)
ISSN: 0022-5347 [Print] United States |
PMID | 8618342
(Publication Type: Journal Article)
|
Chemical References |
- Pyrogallol
- Nitroarginine
- Nitric Oxide
- Streptozocin
- Arginine
- Nitric Oxide Synthase
- Cyclic GMP
- Methylene Blue
|
Topics |
- Animals
- Arginine
(analogs & derivatives, pharmacology)
- Cyclic GMP
(metabolism)
- In Vitro Techniques
- Isometric Contraction
(drug effects, physiology)
- Male
- Methylene Blue
(pharmacology)
- Muscle, Smooth
(drug effects, physiology)
- Nitric Oxide
(physiology)
- Nitric Oxide Synthase
(antagonists & inhibitors)
- Nitroarginine
- Pyrogallol
(pharmacology)
- Radioimmunoassay
- Rats
- Rats, Sprague-Dawley
- Streptozocin
(pharmacology)
- Ultraviolet Rays
- Urinary Bladder
(drug effects, physiology)
|