Study to Assess Enobosarm (GTx-024) in Postmenopausal Women With Stress Urinary Incontinence

GTx-024 is an orally bioavailable and tissue-selective nonsteroidal selective androgen receptor modulator (SARM) that has demonstrated androgenic and anabolic activity and is currently being evaluated as a potential treatment for stress urinary incontinence (SUI) in postmenopausal women. Urinary incontinence and pelvic floor disorders are major health problems for women, especially as they age. Pelvic floor muscle relaxation has been found to correlate with lower urinary tract symptoms including SUI. Muscles of the pelvic floor and lower urinary tract are crucial for supporting the pelvic organs and micturition; however, damage to the muscles or lack of hormonal stimulation are thought to contribute to pelvic organ prolapse and urinary incontinence. Although anabolic steroids may increase muscle mass and strength, lack of oral bioavailability and known potential risks have limited their use. Nonsteroidal SARMs have potential to achieve benefits of anabolic steroid therapy (improved muscle mass, cholesterol/triglyceride levels, glucose metabolism, and bone density) with fewer adverse effects, such as hirsutism and acne, in women. Both nonclinical and clinical data suggest that SARMs may provide a new therapeutic option for pelvic floor and lower urinary tract disorders, as both testosterone and its more potent metabolite, dihydrotestosterone, have anabolic effects on muscle.

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Key information

Conditions

Stress Urinary Incontinence Female Urogenital Diseases Female Urogenital Diseases and Pregnancy Complications Lower Urinary Tract Symptoms Male Urogenital Diseases Pathological Conditions, Signs and Symptoms Signs and Symptoms Urinary Incontinence Urinary Incontinence, Stress Urination Disorders Urogenital Diseases Urologic Diseases Urological Manifestations

Age range

18 year–80 year

Sex eligibility

Female

Study type

Interventional

Phase

Phase 2

Primary location

Urology Center of Alabama, Homewood, Alabama, United States

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Key Inclusion Criteria:

SUI symptoms of at least 6 months duration
Predominant SUI as determined at the Screening Visit using the Medical, Epidemiological, and Social Aspects of Aging (MESA) urinary questionnaire.
24-Hour pad weight > 3 g during the screening period
A minimum of 1 and no more than 15 SUI episodes on any single day AND no fewer than 9 total SUI episodes over 3 days during the screening period
Positive bladder stress test conducted during the Screening Visit

Key Exclusion Criteria:

History of pelvic radiation treatment
History of urethral diverticula
History of urethral sling or anterior prolapse repair
Treatment with urethral bulking agents and/or other SUI procedure or surgery within the 6 months prior to the Screening Visit
Known vesicoureteral reflux, vaginal prolapse beyond the introitus, or other significant pelvic floor abnormalities
Urinary incontinence of neurogenic etiology
Morbidly obese (defined as 100 pounds over ideal body weight, or body mass index 40 or greater)
Chronic hepatitis
Hepatic cirrhosis
Evidence of active infection with hepatitis B or hepatitis C
History of human immunodeficiency virus (HIV) infection
Subjects with a history of breast or endometrial cancer

Treatment and study plan

GTx 024

Drug

Study drug is an opaque, white to off-white, size 5, oval Softgel capsule containing the active ingredient GTx-024.

Other names: Enobosarm

Placebo

Drug

Placebo study drug is identical in appearance to the GTx-024 study drug and contains polyethylene glycol 400 but not GTx-024.

Primary outcomes

Number of Participants With a ≥ 50% Reduction From Baseline in the Mean Number of Stress Incontinence Episodes Per Day at Week 12

Time frame: 12 Weeks

Mean number of subject-reported stress incontinence episodes per day through a responder analysis, where a responder is defined as having a ≥ 50% reduction at the end of treatment (Week 12) compared to baseline in the number of stress incontinence episodes

Sponsors and collaborators

Lead sponsor

GTx

Industry

Registry information

Official study title

Double-Blind, Placebo-Controlled, Parallel Design, Phase 2 Study to Assess Clinical Activity and Safety of Enobosarm (GTx-024) in Postmenopausal Women With Stress Urinary Incontinence

Acronym: ASTRID

Important dates

Study start: 2017
Primary completion: 2018
Study completion: 2018
First posted: Aug 7, 2017
Registry last updated: Mar 24, 2021

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.

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