Document Detail

Expression and functional role of β(3) -adrenoceptors in the human ureter.
MedLine Citation:
PMID:  23360304     Owner:  NLM     Status:  Publisher    
OBJECTIVES: To investigate the presence of β-adrenoceptor subtypes in the human ureter, and to examine whether β(3) -adrenoceptors modulate relaxation of the human ureter. METHODS: Expression of messenger ribonucleic acid of β-adrenoceptors in the human ureter was determined by reverse transcription polymerase chain reaction, and distribution of β-adrenoceptors was examined by immunohistochemistry. In functional studies, the relaxant effects of isoproterenol, procaterol, TRK-380, salbutamol and BRL 37344 on KCl-induced contraction of the human ureter were evaluated, and the inhibitory effects of isoproterenol, procaterol and TRK-380 on electrical field stimulation-induced contractions were determined. RESULTS: Expression of β(1) -, β(2) - and β(3) -adrenoceptor messenger ribonucleic acid in the human ureter was confirmed by reverse transcription polymerase chain reaction. Positive staining for β(1) -, β(2) - and β(3) -adrenoceptor was identified not only in smooth muscle, but also in the urothelium of the human ureter. All β-adrenoceptor agonists decreased the tone of KCl-induced contractions of the human ureter with a rank order of relaxant effects of isoproterenol > procaterol > TRK-380 > salbutamol > BRL 37344. Furthermore, isoproterenol, procaterol and TRK-380 significantly decreased the amplitude of electrical field stimulation-induced contractions with a rank order of inhibitory effects of isoproterenol > procaterol > TRK-380. CONCLUSIONS: Human ureteral relaxation is mediated by both β(2) - and β(3) -adrenoceptor stimulation. β(3) -Adrenoceptor agonists have the potential to relax the human ureter, and their clinical application in the treatment of ureteral stones is expected.
Rikiya Matsumoto; Atsushi Otsuka; Takahisa Suzuki; Hitoshi Shinbo; Takuji Mizuno; Yutaka Kurita; Soichi Mugiya; Seiichiro Ozono
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-29
Journal Detail:
Title:  International journal of urology : official journal of the Japanese Urological Association     Volume:  -     ISSN:  1442-2042     ISO Abbreviation:  Int. J. Urol.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9440237     Medline TA:  Int J Urol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2013 The Japanese Urological Association.
Department of Urology, Hamamatsu University School of Medicine, Hamamatsu, Japan.
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