Molecular and pharmacological detection of dopaminergic receptors in the human male urinary tract.
Neurourol Urodyn
; 28(4): 343-8, 2009.
Article
em En
| MEDLINE
| ID: mdl-18973141
ABSTRACT
AIMS:
Evidence indicates that dopamine (DA) and DA receptors play a role in the central nervous system (CNS) control of micturition; however, while the central DAergic role in the micturition physiology has been extensively investigated, the expression and the function of DA receptors in the urinary tract are still under investigation. Here, we studied the distribution of DA receptor subtypes in different parts of the human male urinary tract.METHODS:
Fragments were collected from 34 men. The mRNAs encoding DA receptors were assessed by RT-PCR, followed by densitometric analysis. Adenylyl cyclase (AC) activity was evaluated using a commercially available RIA kit. Statistical analysis was carried out using one-way ANOVA, with the Bonferroni's post hoc test.RESULTS:
Results obtained indicated that RT-PCR products of D(1), D(4), and D(5) subtypes were obtained in each part studied, while no signal was observed for the D(2) and D(3) receptor subtypes. The pharmacological characterization demonstrated that the expressed DA receptors were linked to AC.CONCLUSIONS:
DA receptors were expressed throughout the human male urinary tract, from the ureter to the prostatic urethra. In particular, we observed a distinctive DA receptor subtype distribution, with evidence of the presence of mRNA encoding both subtypes of the D(1)-like DA receptor family (D(1) and D(5)), while the D(4) receptors were the only expressed subtype of the D(2)-like family. These results suggested that DAergic drugs used for the treatment of a number of diseases may influence the micturition physiology not only in the CNS, but at the peripheral level as well.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Sistema Urinário
/
Fenômenos Fisiológicos do Sistema Urinário
/
Receptores Dopaminérgicos
Tipo de estudo:
Diagnostic_studies
Limite:
Aged
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Neurourol Urodyn
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
Itália