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Updated: May 14, 2026
The Use of Cystometry in Small Rodents: A Study of Bladder Chemosensation
Published on: August 21, 2012
Expression of caveolin-1 in rat urinary bladder with cyclophosphamide-induced cystitis
Sun-Ouck Kim1, Seung Hee Song, Seung-Chul Lee
1Department of Urology, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, Korea.
Purpose:
The purposes of this study were to investigate the effect of cyclophosphamide (CYP)-induced inflammatory cystitis on caveolin 1 in rat urinary bladder and to determine the role of these molecules in the bladder dysfunction that occurs in inflammatory change in rat urinary bladder.
Methods:
Female Sprague-Dawley rats were divided into control (n=30) and experimental (n=30) groups. Cystitis in experimental group was induced by intraperitoneal injection of CYP (200 mg/kg). The control group underwent an intraperitoneal saline injection. After 3 days, 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 immunofluorescent study in rat urinary bladder.
Results:
In cystometrograms, the contraction interval (minute) was significantly increased in the CYP-induced cystitis rats (15.8±1.5) than in the control group (6.3±0.5) (P<0.05). Conversely, the average contraction pressure (mmHg) was significantly higher in the CYP-induced cystitis rats (15.6±1.7) than in the control group (11.3±0.5) (P<0.05). Caveolin 1 was expressed in the capillaries, arteriols and venules. The protein expression of caveolin 1 was significantly decreased in the CYP-induced cystitis rats (P<0.05).
Conclusions:
Inflammatory change of urinary bladder maybe causes a significant change in the expression of caveolin 1. These findings suggest that caveolin 1 might have a functional role in the bladder dysfunction related with cystitis in rat urinary bladder.
