Changes in alpha1-adrenoceptor and NGF/proNGF pathway: a possible mechanism in diabetic urethral dysfunction.
Urol Int
; 93(3): 344-51, 2014.
Article
en En
| MEDLINE
| ID: mdl-24577043
ABSTRACT
OBJECTIVE:
To investigate the changes in the α1-adrenoceptor and nerve growth factor (NGF)/NGF precursor (proNGF) pathway in the urethra after diabetes induction. MATERIALS ANDMETHODS:
Urethral relaxation function was determined by simultaneous recordings of intravesical pressure under isovolumetric conditions and urethral perfusion pressure (UPP) in diabetic rats. The expression of α1-adrenoceptor, NGF, proNGF, low-affinity p75 receptor for neurotrophins (p75(NTR)) and sortilin in the urethras was measured using real-time quantitative polymerase chain reaction (RT-qPCR), enzyme-linked immunosorbent assay and Western blotting.RESULTS:
In diabetic rats, the lowest urethral pressure (UPP nadir) during urethral relaxation was significantly higher. Intravenous administration of tamsulosin, an α1-adrenoceptor antagonist, significantly decreased the UPP nadir and baseline UPP in diabetic rats. RT-qPCR and Western blotting studies showed a statistically significant increase of α1a- and α1b-adrenoceptor in the urethras from the diabetic group (p < 0.05). The expression of NGF was significantly decreased in the urethras from the diabetic group while the expression of proNGF was significantly increased (p < 0.05). The p75(NTR) level in the urethras of diabetic rats was decreased compared with controls (p < 0.05) and there was no significant difference regarding sortilin between the two groups (p > 0.05).CONCLUSION:
This study validated the diabetic urethral dysfunction and furthermore indicated that the increase in the expression of α1-adrenoceptor and changes in the NGF/proNGF pathway may be involved in diabetic urethral dysfunction.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Uretra
/
Receptores Adrenérgicos alfa 1
/
Factor de Crecimiento Nervioso
/
Complicaciones de la Diabetes
/
Diabetes Mellitus Experimental
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
Urol Int
Año:
2014
Tipo del documento:
Article
País de afiliación:
China