Investigations into the presence of functional ß1, ß2 and ß3-adrenoceptors in urothelium and detrusor of human bladder
Int. braz. j. urol
;
35(1): 76-83, Jan.-Feb. 2009. ilus, graf, tab
Article
in English
| LILACS
| ID: lil-510266
ABSTRACT
Purpose:
We investigated the presence of functional ß1, ß2 and ß3-adrenoceptor in urothelium and detrusor muscle of human bladder through in vitro pharmacology of selective ß3 adrenoceptor agonist solabegron. Materials andMethods:
Expression of these adrenoceptors in surgically separated human urothelium and detrusor muscle were investigated using RT-PCR. The effects of activating these receptors were studied by determining the relaxation produced by ß-adrenoceptors agonist in pre-contracted human detrusor strips.Results:
The results confirmed the presence of mRNA for ß1, ß2 and ß3-adrenoceptor in both human urothelium and detrusor. In an in vitro functional bladder assay, Solabegron and other agonists for ß-adrenoceptors such as procaterol and isoproterenol evoked potent concentration-dependent relaxation of isolated human bladder strips with pD2 values of 8.73 ± 0.19, 5.08 ± 0.48 and 6.28 ± 0.54, respectively.Conclusions:
Selective ß3-adrenoceptor agonist may be a potential new treatment for the overactive bladder OAB syndrome. Existence of ß3-adrenoceptor mRNA exists in the urothelium in addition to the detrusor muscle suggest multiple site of actions for the ß3-adrenoceptor in the lower urinary tract.
Full text:
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Index:
LILACS (Americas)
Main subject:
Benzoates
/
Urinary Bladder
/
Adrenergic beta-Agonists
/
Urothelium
/
Aniline Compounds
Limits:
Adolescent
/
Adult
/
Aged
/
Female
/
Humans
/
Male
Language:
English
Journal:
Int. braz. j. urol
Journal subject:
Urology
Year:
2009
Type:
Article
Affiliation country:
United States
Institution/Affiliation country:
University of Pittsburgh/US
/
William Beaumont Hospital/US
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