Efficacy and Safety of GSK1358820 in Subjects With Overactive Bladder

Summary

GSK1358820 is a botulinum neurotoxin A complex that has been approved for the treatment of overactive bladder (OAB) in several countries, however, it has not been approved for OAB treatment in Japan. This study has been planned to evaluate the efficacy and safety of GSK1358820 in Japanese OAB patients with urinary incontinence whose symptoms have not been adequately managed with other medications for OAB.

The primary objective of this study is to evaluate the superiority of a single dose treatment of GSK1358820 100 units (U) compared with placebo.

The study comprises a screening phase up to 28 days, followed by a double-blind treatment phase of 12 to 48 weeks wherein subjects will receive a single treatment of either GSK1358820 100 U injection or Placebo injection, in a ratio of 1:1, with further stratification within the treatment arms according to the number of urinary urge incontinence episodes during screening. Subjects meeting the criteria for re-treatment will receive a second and third treatment. Each re-treatment will be with open-label GSK1358820 100 U injection, and will be spaced at least 12 weeks from the previous treatment.

The total duration of participation for any subject will not exceed 52 weeks, including screening and the 48-week treatment period.

Conditions

• Urinary Bladder, Overactive

Interventions

DRUG

GSK1358820

GSK1358820 injection contains botulinum toxin type A (100 U), sodium chloride (0.9 milligrams \[mg\]), and human serum albumin (0.5 mg). 10 mL of the drug will be injected at 20 sites (0.5 mL at each site) in the detrusor muscle, spaced approximately 1 centimeter (cm) apart. The injection will be administered under local anesthesia, via cystoscopy. Permitted anesthesia options for cystoscopy are intraurethral lidocaine (or similar) gel, and for treatment administration, installation of 1-2% lidocaine (or similar anesthetic) into the bladder.

DRUG

Placebo

Placebo injection is made up of sodium chloride (0.9 mg). 10 mL of the injection will be injected at 20 sites (0.5 mL at each site) in the detrusor muscle, spaced approximately 1 cm apart. The injection will be administered under local anesthesia, via cystoscopy. Permitted anesthesia options for cystoscopy are intraurethral lidocaine (or similar) gel, and for treatment administration, installation of 1-2% lidocaine (or similar anesthetic) into the bladder.

DRUG

Antibiotic therapy

Subjects will use prophylactic antibiotic therapy approved for the indication of UTIs, at the discretion of the investigator, with the exception of those in the class of aminoglycosides. The therapy will begin 1 to 3 days prior to the administration of study treatment, and continue for 1 to 3 days following the treatment.

OTHER

Bladder diary

The bladder diary is a self-reporting tool to record subject's data on micturition. Subjects will enter data in the diary over 3 consecutive days. During Screening, data will be collected within 28 days prior to first treatment. During treatment periods, data will be collected within a week prior to each scheduled visit. The bladder diary will capture the following information: 1) Date and time of urinary episode, 2) episodes of micturition, 3) episodes of urinary incontinence, 4) episodes of urgency, 5) intensity of urgency, 6) episodes of nocturia, 7) use of CIC, and 8) urine volume. Diary data will not be collected when a subject experiences symptoms of a UTI.

OTHER

King's Health Questionnaire (KHQ)

The KHQ will assess the impact of urinary incontinence on QOL. It is a questionnaire with 21 items and the following 9 domains: 1) General health, 2) Incontinence impact, 3) Role limitations, 4) Physical limitations, 5) Social limitations, 6) Personal relationships, 7) Emotion, 8) Sleep/energy, 9) Severity measure. The items are answered by subjects themselves, and scores are summated using a defined algorithm.

OTHER

Overactive Bladder Symptom Score (OABSS)

The OABSS will comprehensively assess symptoms of OAB, such as frequency of micturition, nocturia, urinary urgency, and urge incontinence. It consists of 4 questions which will be responded by subjects themselves, by selecting the most appropriate answer for each question.

OTHER

Treatment Benefit Scale (TBS)

The TBS consists of one question ("My condition has"), to which the subject will answer by selecting one of the following responses: greatly improved, improved, not changed, worsened. The TBS will assess treatment benefit of GSK1358820.

Sponsors & Collaborators

• GlaxoSmithKline

  lead INDUSTRY

Principal Investigators

• GSK Clinical Trials · GlaxoSmithKline

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

DOUBLE

Model

PARALLEL

Eligibility

Min Age

20 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2016-08-10

Primary Completion

2018-03-06

Completion

2018-11-12

Countries

• Japan

Study Locations