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Clinical Trial Summary

The aim of this study is to study safety, tolerability and efficacy of muscle derived cell (MDC) therapy in children with bladder exstrophy epispadias induced urinary incontinence.


Clinical Trial Description

Bladder exstrophy patients who have undergone primary bladder closure, but have a bladder capacity too low for bladder neck reconstruction (Group 1), have limited additional surgical options that permits urethral voiding and urine storage within a native bladder. Previous studies have demonstrated a positive correlation between bladder capacity and success of bladder neck reconstruction. Likewise, patients who have undergone bladder neck reconstruction but continue to have urinary incontinence (Group 2) are also faced with limited options. Often, both groups are considered for augmentation cystoplasty with closure of the bladder neck requiring intermittent catheter voiding through a surgically constructed continent catheterizable channel. Such major reconstruction has significant associated short and long-term morbidities. Endoscopic injection of MDCs for the treatment of urinary sphincter insufficiency is a potential alternative therapy for these patients. By increasing the outflow resistance and rhabdosphincter contractility, MDC injection may permit more efficient bladder cycling and bladder expansion in Group 1 patients allowing them to proceed on to bladder neck reconstruction. This same increase in resistance and sphincter contractility may allow Group 2 patients to attain urinary continence and avoid any further reconstructive surgical procedures.

Eligible and consented patients would undergo rectus muscle biopsy and immediately transferred to the Cell Therapy Lab for tissue processing and MDC expansion.The MDC expansion process takes approximately 21 days after which cells are harvest and cryopreserved for future injection.Each vial will be filled with cells at a concentration of approximately 2.0 x 107 cells/ml. At the time of planned MDC injection, enrolled patients will return for cystoscopy under anesthesia. At that time, aliquots of MDCs will be removed from the freezer and be allowed to thaw passively in the 30 minutes preceding the time of planned injection. MDC product will be endoscopically injected using an FDA approved DEFLUX™ needle at the level of the external urethral rhabdosphincter and bladder neck. Patients would be assessed for toxicity and adverse events postoperatively at day 1 and 40 followed by semiannual visits for 36 months. variables measured are:

group 1: Bladder capacity, detrusor leak point pressure, bladder filling pressure, post-void residual urine volume, urodynamics, periurethral electromyographic activity, renal - Bladder Ultrasound, cystoscopy.

Group 2: Detrusor leak point pressure, bladder filling pressure, maximum cystometric capacity, post-void residual urine volume, periurethral electromyographic activity, 24 hour pad / diaper weight assessment, voiding diary including incontinence grade and maximum daytime dry interval, renal - Bladder Ultrasound, cystoscopy ;


Study Design


Related Conditions & MeSH terms


NCT number NCT01011777
Study type Interventional
Source Johns Hopkins University
Contact
Status Terminated
Phase Phase 1
Start date February 1, 2017
Completion date January 23, 2020

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