Effect of Botulinum Toxin A on Detrusor Overactivity and Renal Function in Chronic Spinal Cord Injured Patients

NCT ID: NCT01682603

Last Updated: 2017-03-20

Study Results

Results available

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE2

Total Enrollment

34 participants

Study Classification

INTERVENTIONAL

Study Start Date

2012-09-30

Study Completion Date

2013-12-31

Brief Summary

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To investigate the clinical effect of detrusor botulinum toxin A (BoNT-A) injection on neurogenic detrusor overactivity (NDO) and renal function and to compare the difference of expressions of sensory receptors and nerve growth factor (NGF) in the bladder wall of patients respond and not respond to BoNT-A injections in chronic spinal cord injured (SCI) patients.

Detailed Description

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Study Procedure

A total of 30 patients with chronic suprasacral cord SCI will be enrolled in this study. All patients are more than 18 years old and have chronic suprasacral cord injury for more than 1 year. They have previously underwent an urodynamic study and have been proven having detrusor sphincter dyssynergia (DSD). The patients currently void by reflex, abdominal stimulation or clean intermittent catheterization (CIC), are free of indwelling catheter or cystostomy, and free of urinary tract infection (UTI) on their enrollment. During the screening period, a total glomerular filtration rate (GFR) should be less than 80 mL/min as measured by 99mTc-labelled diethylenetriamine pentaacetic acid (99mTc-DTPA) clearance renal scanning. Patients should also have adequate hand function or have a care-giver available for CIC. Other exclusion criteria include patients with detrusor underactivity and large bladder compliance, patients proven to have intrinsic sphincteric deficiency and patients who have hypersensitivity to botulinum toxin A (BTX-A) or constituent ingredients of BTX-A.

BTX-A injection will be performed in the operation room under light intravenous general anesthesia to prevent autonomic dysreflexia and hyperreflexia during cystoscopy. A total of 300U BTX-A (BOTOX, 100 U/vial, Allergan Co., Irvine, USA) dissolved into 30 mL normal saline will be injected into 30 sites of the bladder including lateral, posterior wall and dome. The injection sites are widely distributed to cover the whole bladder wall. A 14 Fr Foley catheter will be routinely inserted after BTX-A injection and patients will be discharged the next morning and followed up at out-patient clinic. All patients will be instructed to keep on CIC or abdominal stimulation as they previously performed. BTX-A injections will be repeated 6 months after the first treatment, then follow up to 24 months. Before each BTX-A injection a videourodynamic study and GFR test will be performed. Patients were also requested to report the severity of urinary incontinence by the mean daily incontinence episodes within three days, Urogenital Distress Inventory (UDI-6 Short Form), Incontinence Impact Questionnaire (IIQ-7), self assessed QoL index and the global satisfaction rate (graded as 0 to 3, indicating none, mild, moderate and very satisfied) to this treatment. The adverse events such as urinary tract infection, hematuria, difficult urination are also recorded.

This study should be approved by the Institutional Review Board and Ethics Committee of the hospital. Informed consent will be obtained before the screening and all patients are instructed about the possible complications related with BTX-A injection such as urinary retention, transient hematuria and subsequent urinary tract infection.

Patients will be classified as responders and non-responders according to their clinical presentation and urodynamic study results. Responders are considered if they become dry or reduction of incontinence episodes by 50% and have a decrease of detrusor pressure reduction by 50% of the baseline value, otherwise, they are considered as non-responders. The end-point is set at 6 months after the BTX-A injection.

There were two primary end-points: (1) the net change of the IIQ-7 and UDI-6 from baseline to 24 months, and (2) the net change of the GFR from baseline to 24 months. Secondary end-point efficacy measured the net change of the cystometric bladder capacity, bladder compliance, detrusor pressure during reflex voiding, end-filling pressure or detrusor leak-point pressure and postvoid residual volume from baseline to 24 months.

Three bladder biopsies using a small cystoscopic biopsy forceps will be performed in all patients. The biopsy will be performed at baseline and each time-point just prior to intravesical BTX-A injection. The bladder biopsy specimens will be sent to pathological department for H-E staining to exclude the possibility of carcinoma in situ, and also will be embedded in O.C.T. medium and stored at -80℃ refrigerator or liquid nitrogen tank for investigations. The bladder biopsies will be prepared for measurement of NGF messenger RNA (mRNA) and immunohistochemistry investigation of the expression of Transient Receptor Potential Vanilloid 1 (TRPV-1), purinergic receptor P2X, ligand-gated ion channel, 3 (P2X3) receptors at baseline and 6 months after each BTX-A injection, and the difference of these sensory protein expressions between responders and .non-responders to BTX-A injection.

Conditions

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Spinal Cord Injuries

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Botulinum toxin A

BoNT-A (BOTOX 300U)

Group Type EXPERIMENTAL

Botulinum toxin A

Intervention Type DRUG

BoNT-A (BOTOX 300U)

Interventions

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Botulinum toxin A

BoNT-A (BOTOX 300U)

Intervention Type DRUG

Other Intervention Names

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BoNT-A (BOTOX 300U)

Eligibility Criteria

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Inclusion Criteria

* Adults with age of 19 years old or above
* Patients with chronic suprasacral cord SCI will be enrolled.
* Patients will be proven having NDO by videourodynamic study during the screening period.
* They also receive 99mTc-DTPA renal scanning for GFR at baseline.

Exclusion Criteria

* Patients with detrusor underactivity and large bladder compliance, patients proven to have intrinsic sphincteric deficiency
* Patients who have hypersensitivity to BTX-A or constituent ingredients of BTX-A.
Minimum Eligible Age

19 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Buddhist Tzu Chi General Hospital

OTHER

Sponsor Role lead

Responsible Party

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Hann-Chorng Kuo

Director of Urology

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Hann-Chorng Kuo, M.D.

Role: PRINCIPAL_INVESTIGATOR

Department of Urology, Buddhist Tzu Chi General Hospital and Tzu Chi University

Locations

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Buddhist Tzu Chi General Hospital

Hualien City, , Taiwan

Site Status

Countries

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Taiwan

References

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Other Identifiers

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TCGHUROL005

Identifier Type: -

Identifier Source: org_study_id

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