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Efficacy and Safety of Losmapimod in Treating Participants With Facioscapulohumeral Muscular Dystrophy (FSHD) (REACH)

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ClinicalTrials.gov Identifier: NCT05397470
Recruitment Status : Active, not recruiting
First Posted : May 31, 2022
Last Update Posted : March 12, 2024
Sponsor:
Information provided by (Responsible Party):
Fulcrum Therapeutics

Study Description
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Brief Summary:
This is a study to evaluate the safety and efficacy of losmapimod in treating participants with Facioscapulohumeral Muscular Dystrophy (FSHD). Participants diagnosed with Facioscapulohumeral muscular dystrophy type 1 (FSHD1) or Facioscapulohumeral muscular dystrophy type 2 (FSHD2) will participate in Part A (Placebo-controlled treatment period) and will be randomized in a 1:1 ratio to receive losmapimod 15 milligrams (mg) or placebo orally twice daily (BID). Upon completion of Part A, participants will have the option to rollover into Part B (open-label extension) to evaluate the long-term safety, tolerability, and efficacy of losmapimod and will receive losmapimod 15 mg orally BID.

Condition or disease Intervention/treatment Phase
Facioscapulohumeral Muscular Dystrophy (FSHD) Drug: Losmapimod Drug: Placebo oral tablet Phase 3

Study Design
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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 260 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Masking Description: Part A of this study will be performed in a double-blind fashion. Part B of the study will be performed in an open-label fashion. The investigator, study staff, subjects, sponsor, and monitor will remain blinded to the treatment in Part A until study closure (i.e., until closure of Part B).
Primary Purpose: Treatment
Official Title: A Phase 3 Global, Randomized, Double-Blind, Placebo-Controlled, 48-Week, Parallel-Group Study of the Efficacy and Safety of Losmapimod in Treating Patients With Facioscapulohumeral Muscular Dystrophy (FSHD) (REACH)
Actual Study Start Date : June 16, 2022
Estimated Primary Completion Date : October 2024
Estimated Study Completion Date : January 2026

Resource links provided by the National Library of Medicine


Arms and Interventions
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Arm Intervention/treatment
Experimental: Part A: Placebo-controlled treatment period: Losmapimod
Participants will be randomized to receive losmapimod.
 Drug: Losmapimod
Losmapimod 15 mg will be administered BID by mouth along with food.
Placebo Comparator: Part A: Placebo-controlled treatment period: Placebo
Participants will be randomized to receive placebo
 Drug: Placebo oral tablet
Placebo will be administered BID by mouth along with food.
Experimental: Part B: Open-label extension
Participants will receive losmapimod, upon completion of all assessments for Part A.
 Drug: Losmapimod
Losmapimod 15 mg will be administered BID by mouth along with food.


Outcome Measures
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Primary Outcome Measures :
  1. Part A: Change from Baseline in total Relative surface area (RSA) Quadrants 1 to 5 (Q1-Q5) with 500 grams (g) wrist weight averaged over both arms as assessed by Reachable workspace (RWS) at Week 48 [ Time Frame: Baseline and at Week 48 ]
    The RWS is a clinical outcome measure that measures the relative surface area that a participant may reach with an outstretched arm. Responses are rated on a scale of 0 (no reachable workspace) to 1.25 (maximal reachable workspace). Higher scores indicate better outcomes.

  2. Part B: Number of participants reporting Adverse events (AEs) [ Time Frame: Up to Week 192 ]
  3. Part B: Number of participants with clinically significant changes in clinical laboratory parameters, Electrocardiogram (ECG), vital signs and physical examinations [ Time Frame: Up to Week 192 ]

Secondary Outcome Measures :
  1. Part A: Change from Baseline in Quality of Life in Neurologic Disorders upper extremity (Neuro-QoL UE) Scale at Week 48 [ Time Frame: Baseline and at Week 48 ]
    The Neuro-QoL UE will be used to measure change(s) from Baseline in the participants upper extremity function. The Neuro-QoL UE is a questionnaire that measures the participants self-reported upper extremity function including activities of daily living (ADLs) involving digital, manual, and reach-related function and self-care. Responses are rated from 1 (unable to do) to 5 (without any difficulty). Lower scores indicate worse symptoms.

  2. Part A: Patient's Global Impression of Change (PGIC) at Week 48 [ Time Frame: At Week 48 ]
    The Patient Global Impression of Change (PGIC) is a standard and validated participant-report outcome that measures the participant's self-reported change in health status compared to the start of the study. The PGIC uses a single question and 7-point patient self-reporting scale of overall improvement during treatment ranging from 1 (very much improved) to 7 (very much worse). Higher scores indicate worse symptoms.

  3. Part A: Change from Baseline in Whole body (WB) longitudinal composite Muscle Fat Infiltration (MFI) of B muscles at Week 48 [ Time Frame: Baseline and at Week 48 ]
    Change from Baseline in skeletal muscle tissue replacement by fat will be measured by WB musculoskeletal (MSK) magnetic resonance imaging (MRI).

  4. Part A: Change from Baseline in average shoulder abductor strength by hand-held quantitative dynamometry at Week 48 [ Time Frame: Baseline and at Week 48 ]
    Quantitative: isometric dynamometry (hand-held dynamometer) will be used to assess the skeletal muscle strength. Isometric dynamometry measures the static muscle strength without any movement.

  5. Part A: Number of participants reporting Adverse events (AEs) [ Time Frame: Up to Week 48 ]
  6. Part A: Number of participants with clinically significant changes in clinical laboratory parameters, ECG, vital signs and physical examinations [ Time Frame: Up to Week 48 ]

Eligibility Criteria
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Ages Eligible for Study:   18 Years to 65 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Participants must be between 18 and 65 years of age, inclusive.
  • Genetically confirmed diagnosis of FSHD 1 or FSHD 2.
  • Clinical severity score of 2 to 4 (Ricci Score; Range 0-5), at screening. Participants who are wheelchair-dependent or dependent on walker or wheelchair for activities are not permitted to enroll in the study.
  • Screening total RSA (Q1-Q4) without weight in the dominant UE assessed by RWS ≥ 0.2 and ≤ 0.7.
  • No contraindications to MRI.

Exclusion Criteria:

  • Previously diagnosed cancer that has not been in complete remission for at least 5 years. Localized carcinomas of the skin and carcinoma in situ of the cervix that have been resected or ablated for cure are not exclusionary.
  • Participants who are on drug(s) or supplements that may affect muscle function, as determined by the Investigator: participants must be on a stable dose of that drug(s) or supplement for at least 3 months prior to the first dose of study drug and remain on that stable dose for the duration of the study.
  • Known active opportunistic or life-threatening infections including Human Immunodeficiency virus (HIV) and hepatitis B or C.
  • Known active or inactive tuberculosis infection.
  • Acute or chronic history of liver disease.
  • Known severe renal impairment.
  • History of cardiac dysrhythmias requiring anti-arrhythmia treatment(s); or history or evidence of abnormal ECGs.
  • Use of another investigational product within 30 days or 5 half-lives (whichever is longer) or currently participating in a study of an investigational device.
  • Current or anticipated participation in a natural history study. Previous participation is allowed but participants cannot continue after enrollment in Study 1821-FSH-301.
  • Known hypersensitivity to losmapimod or any of its excipients.
  • Previous participation in a Fulcrum-sponsored FSHD losmapimod study (FIS-001-2019 or FIS-002-2019).

Note that all other inclusion and exclusion criteria are listed in the protocol and only key are presented.

Contacts and Locations
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Information from the National Library of Medicine

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): NCT05397470


Locations
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Sponsors and Collaborators
Fulcrum Therapeutics
More Information
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Publications:

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Responsible Party: Fulcrum Therapeutics
ClinicalTrials.gov Identifier: NCT05397470    
Other Study ID Numbers: 1821-FSH-301
First Posted: May 31, 2022    Key Record Dates
Last Update Posted: March 12, 2024
Last Verified: March 2024
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Fulcrum Therapeutics:
Facioscapulohumeral muscular dystrophy (FSHD)
Facioscapulohumeral muscular dystrophy type 1 (FSHD 1)
Facioscapulohumeral muscular dystrophy type 2 (FSHD 2)
Muscular Dystrophies
Muscular Dystrophy
 Facioscapulohumeral Muscular Disorders
Musculoskeletal Diseases
Neuromuscular Diseases
REACH
Additional relevant MeSH terms:
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Muscular Dystrophies
Muscular Dystrophy, Facioscapulohumeral
Muscular Disorders, Atrophic
Muscular Diseases
 Musculoskeletal Diseases
Neuromuscular Diseases
Nervous System Diseases
Genetic Diseases, Inborn