title: Mirodenafil prevents bladder dysfunction induced by chronic bladder ischemia in rats.
abstract: OBJECTIVE
  To investigate the protective effect of mirodenafil on bladder function in a rat model of chronic bladder ischemia (CBI).
  
  
  METHODS
  Twenty-four Sprague-Dawley rats were randomized to three groups: untreated, sham-operated rats (control group); untreated, CBI model rats (CBI group); and CBI rats treated daily with 4 mg/kg mirodenafil (CBI+mirodenafil group). The CBI and CBI+mirodenafil groups underwent endothelial injury to the iliac arteries and were fed a 2% cholesterol diet after injury. Four weeks after surgery, the CBI+mirodenafil group started daily treatment with mirodenafil for four weeks. Eight weeks after surgery, continuous in vivo cystometry and in vivo organ bath studies of detrusor muscle strips were performed.
  
  
  RESULTS
  in vivo cystometry revealed that the rats in the CBI group had a significantly higher micturition frequency, lower bladder capacity, and lower compliance than the rats in the control and CBI+mirodenafil groups. The detrusor muscle strip study showed that the magnitude of the carbachol-induced contractile response was significantly lower in the CBI group compared to either the control or CBI+mirodenafil group. Addition of daily mirodenafil after induction of CBI decreased the contractile response, compared to untreated CBI rats. CBI induced submucosal fibrosis and degenerative changes in bladder walls, which was reversed by the addition of mirodenafil.
  
  
  CONCLUSIONS
  Daily treatment with mirodenafil showed protective effects against bladder dysfunction resulting from CBI in rats.
authors.affiliation: Department of Urology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea.
authors.forename: Hoon
authors.initials: H
authors.lastname: Choi
authors.affiliation: Department of Urology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea.
authors.forename: Jae Hyun
authors.initials: JH
authors.lastname: Bae
authors.affiliation: Department of Urology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea.
authors.forename: Ji Sung
authors.initials: JS
authors.lastname: Shim
authors.affiliation: Department of Urology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea.
authors.forename: Jae Young
authors.initials: JY
authors.lastname: Park
authors.affiliation: Department of Urology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea.
authors.forename: Du Geon
authors.initials: du G
authors.lastname: Moon
authors.affiliation: Department of Urology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea.
authors.forename: Jeong Gu
authors.initials: JG
authors.lastname: Lee
keywords: Ischemia; Phosphodiesterase 5 Inhibitors; Urinary Bladder
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