A Study to Evaluate the Efficacy and Safety of Reldesemtiv in Patients With Amyotrophic Lateral Sclerosis (ALS) (COURAGE-ALS)
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ClinicalTrials.gov Identifier: NCT04944784 |
Recruitment Status :
Recruiting
First Posted : June 30, 2021
Last Update Posted : March 13, 2023
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Condition or disease | Intervention/treatment | Phase |
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Amyotrophic Lateral Sclerosis | Drug: Reldesemtiv Drug: Placebo | Phase 3 |
COURAGE-ALS is a Phase 3, double-blind, randomized, placebo-controlled trial of reldesemtiv in patients aged 18 to 80 with ALS.
The screening and qualification period for the trial will be no more than 14 days in duration. Approximately 555 eligible ALS patients will be randomized (2:1) to receive the following dose of reldesemtiv or placebo (stratified by riluzole use/non-use and edaravone use/non-use) for the first 24 weeks (double-blind, placebo-controlled period):
- 300 mg reldesemtiv twice a day for a 600 mg total daily dose (TDD)
- Placebo twice daily
At the end of the 24-week double-blind, placebo-controlled period, patients will transition to the active drug period, where all patients will receive the following dose of reldesemtiv for the next 24 weeks:
- 300 mg reldesemtiv twice a day for a 600 mg TDD for patients who were not down titrated during the 24 weeks of blinded dosing
- 150 mg reldesemtiv twice a day for a 300 mg TDD for patients who were down titrated during the 24 weeks of blinded dosing
Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 555 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor) |
Primary Purpose: | Treatment |
Official Title: | A Phase 3, Multi-Center, Double-Blind, Randomized, Placebo-Controlled Trial to Evaluate the Efficacy and Safety of Reldesemtiv in Patients With Amyotrophic Lateral Sclerosis (ALS) |
Actual Study Start Date : | August 16, 2021 |
Estimated Primary Completion Date : | December 2023 |
Estimated Study Completion Date : | March 2024 |

Arm | Intervention/treatment |
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Experimental: 300 mg reldesemtiv twice daily for a 600 mg total daily dose, from Day 1 until Week 24
Patients in this arm take 2 reldesemtiv 150 mg oral tablets twice a day for a 600 mg total daily dose from Day 1 until Week 24.
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Drug: Reldesemtiv
Reldesemtiv Oral Tablet |
Placebo Comparator: Placebo twice daily, from Day 1 until Week 24
Patients in this arm take 2 placebo oral tablets twice a day from Day 1 until Week 24.
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Drug: Placebo
Placebo Oral Tablet |
Experimental: 300 mg reldesemtiv twice daily for a 600 mg total daily dose, from Week 24 until Week 48
Patients in this arm take 2 reldesemtiv 150 mg oral tablets twice a day for a 600 mg total daily dose from Week 24 until Week 48 for patients who were not down titrated during the 24 weeks of blinded dosing.
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Drug: Reldesemtiv
Reldesemtiv Oral Tablet |
Experimental: 150 mg reldesemtiv twice daily for a 300 mg total daily dose, from Week 24 until Week 48
Patients in this arm take 1 reldesemtiv 150 mg oral tablet twice a day for a 300 mg total daily dose from Week 24 until Week 48 for patients who were down titrated for any reason during the 24 weeks of blinded dosing.
|
Drug: Reldesemtiv
Reldesemtiv Oral Tablet |
- Effect of reldesemtiv versus placebo on functional outcomes in ALS [ Time Frame: Baseline to Week 24 ]Change from baseline to Week 24 in ALS Functional Rating Scale-Revised (ALSFRS-R) total score; rating scale 0 to 48; higher scores indicate better functional status
- Effect of reldesemtiv versus placebo on combined functional and survival outcomes in ALS [ Time Frame: 24 Weeks ]Combined assessment of change in ALSFRS-R total score, time to onset of respiratory insufficiency, and survival time up to Week 24. In this joint rank test each individual patient is ranked compared to all other patients based on survival time, time to onset of respiratory insufficiency, and changes from baseline to Week 24 in ALSFRS-R total score. Deaths have the worst rank (with earlier deaths being ranked worse than later deaths); patients with onset of respiratory insufficiency have the next worst rank; and the more favorable changes from baseline at week 24 in ALSFRS-R total score have the best rank using this process.
- Effect of reldesemtiv versus placebo on ventilatory function [ Time Frame: Baseline to Week 24 ]Change from baseline to Week 24 in the percent predicted FVC
- Effect of reldesemtiv versus placebo on quality of life [ Time Frame: Baseline to Week 24 ]Change from baseline to Week 24 in the ALS Assessment Questionnaire-40 (ALSAQ-40) total score; rating scale 0 to 100; higher scores indicate worse quality of life
- Effect of reldesemtiv versus placebo on handgrip strength [ Time Frame: Baseline to Week 24 ]Change from baseline to Week 24 in handgrip strength (average of both hands)

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Ages Eligible for Study: | 18 Years to 80 Years (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Key Inclusion Criteria:
- Males or Females between the ages of 18 and 80 years of age, inclusive
- Diagnosis of familial or sporadic ALS (defined as meeting the laboratory-supported probable, probable, or definite criteria for ALS according to the World Federation of Neurology El Escorial criteria). Patients who meet the possible criteria are eligible if they have lower motor neuron findings; those who have purely upper motor neuron findings are ineligible.
- First symptom of ALS ≤ 24 months prior to screening. The qualifying first symptoms of ALS are limited to manifestations of weakness in extremity, bulbar, or respiratory muscles.
- ALSFRS-R total score ≤ 44 at screening. Patients with a total score of 45 or higher may be rescreened 60±7 days following the original screening date.
- Upright FVC ≥ 65.0% of predicted for age, height, sex and ethnicity at screening according to Global Lung Initiative equation
- Must be either on riluzole for ≥ 30 days prior to screening or have not taken it for at least 30 days prior to screening
- Must have completed at least 2 cycles of edaravone at the time of screening or have not received it for at least 30 days prior to screening
- Able to swallow whole tablets
Exclusion Criteria:
- eGFRCysC < 45.0 mL/min/1.73 m2 at screening
- Urine protein/creatinine ratio > 1 mg/mg (113 mg/mmol) at screening
- Alanine aminotransferase (ALT) or aspartate aminotransferase (AST) ≥ 3-times the upper limit of normal (ULN)
- Total bilirubin (TBL), direct or indirect bilirubin above the ULN.
- Cognitive impairment, related to ALS or otherwise that impairs the patient's ability to understand and/or comply with study procedures and provide informed consent
- Other medically significant neurological conditions that could interfere with the assessment of ALS symptoms, signs or progression.
- Has a tracheostomy

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04944784
Contact: Cytokinetics, MD | 650-624-2929 | medicalaffairs@cytokinetics.com |

Study Director: | Cytokinetics, MD | Cytokinetics |
Responsible Party: | Cytokinetics |
ClinicalTrials.gov Identifier: | NCT04944784 |
Other Study ID Numbers: |
CY 5031 2020-004040-29 ( EudraCT Number ) |
First Posted: | June 30, 2021 Key Record Dates |
Last Update Posted: | March 13, 2023 |
Last Verified: | March 2023 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Amyotrophic Lateral Sclerosis ALS CK-2127107 Reldesemtiv COURAGE-ALS |
Motor Neuron Disease Amyotrophic Lateral Sclerosis Sclerosis Pathologic Processes Neurodegenerative Diseases Nervous System Diseases |
Neuromuscular Diseases Spinal Cord Diseases Central Nervous System Diseases TDP-43 Proteinopathies Proteostasis Deficiencies Metabolic Diseases |