Effects of Estrogens on the Expression of Caveolin-1 in the Urinary Bladders of Female Rats / 대한배뇨장애요실금학회지
International Neurourology Journal
;
: 13-18, 2011.
Artigo
em Inglês
| WPRIM
| ID: wpr-173930
ABSTRACT
PURPOSE:
The purposes of this study were to investigate the effect of hormonal alterations on the expression of caveolin-1 in the urinary bladders of ovariectomized rats and to determine the role of caveolin-1 in the overactivity of the detrusor muscle that occurs with hormonal alterations in rats.METHODS:
Female Sprague-Dawley rats were divided into three groups a control group, a group that underwent bilateral ovariectomy (Ovx), and a group that underwent bilateral ovariectomy followed by subcutaneous injections of 17beta-estradiol (Ovx+Est). After 4 weeks, urodynamic studies were done to measure the contraction interval and contraction pressure. The expression and cellular localization of caveolin-1 were determined by Western blot and immunofluorescence in the urinary bladders of rats.RESULTS:
On cystometrograms, the contraction interval was significantly shorter in the Ovx group (3.0+/-0.3 minute) than in the control group (5.6+/-0.5 minute) but was longer in the Ovx+Est group (9.2+/- 0.4 minute) (P<0.05). Conversely, the average contraction pressure was higher in the Ovx group (26.4+/-0.48 mmHg) than in the control group (21.8+/-0.37 mmHg) but was lower in the Ovx+Est group (23.9+/-0.76 mmHg) (P<0.05). Caveolin-1 was expressed in the capillaries, arterioles, and venules. Expression of the protein caveolin-1 was significantly lower after ovariectomy and was restored to control levels after treatment with 17beta-estradiol (P<0.05).CONCLUSIONS:
Hormonal alterations cause a significant change in the expression of caveolin-1, which suggests that caveolin-1 might have a functional role in the overactivity of the detrusor muscle related to hormonal alterations in the urinary bladders of rats.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Arteríolas
/
Urodinâmica
/
Vênulas
/
Bexiga Urinária
/
Capilares
/
Ovariectomia
/
Western Blotting
/
Imunofluorescência
/
Ratos Sprague-Dawley
/
Contratos
Limite:
Animais
/
Feminino
/
Humanos
Idioma:
Inglês
Revista:
International Neurourology Journal
Ano de publicação:
2011
Tipo de documento:
Artigo
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