AzTrials
AzTrials

Facioscapulohumeral Muscular Dystrophy (FSHD)Phase 2NCT04264442

Efficacy and Safety of Losmapimod in Treating Subjects With Facioscapulohumeral Muscular Dystrophy (FSHD) With Open-Label Extension (OLE)

A Phase 2 study testing Losmapimod in people with Facioscapulohumeral Muscular Dystrophy (FSHD), run by Fulcrum Therapeutics at 17 sites in 4 countries.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
Search all trials

Trial summary

This study is an open-label extension to evaluate the safety and tolerability of long-term dosing of Losmapimod in patients with FSHD1 who participated in the ReDux4 study. Read more about this study

Who is it for?
Ages 18 to 65 years
What is being tested?
Losmapimod
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
76 participants
Where
17 sitesin 4 countries
Study dates
13 Feb 2020to 7 Nov 2024
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 65 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • The patient must have consented to participate and must have provided signed, dated and witnessed an IRB-approved informed consent form that conforms to federal and institutional guidelines.
  • Male or female subjects
  • Patients must be between 18 and 65 years of age, inclusive
  • Must be willing and able to comply with scheduled visits, treatment plan, study restrictions, laboratory tests, contraceptive guidelines and other study procedures.
  • Will practice an approved method of birth control

Who cannot join

  • Has a history of any illness or any clinical condition that, in the opinion of the investigator, might confound the results of the study or pose an additional risk in administering study drug to the subject. This may include, but is not limited to, a history of relevant drug or food allergies; history of cardiovascular or central nervous system disease; neuromuscular diseases except FSHD (eg, myopathy, neuropathy, neuromuscular junction disorders); or clinically significant history of mental disease.
  • For subjects who are on drug(s) or supplements that may affect muscle function, as determined by the treating physician, or that are included in the list of drugs presented in the protocol, subjects 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. Changes to the dose or treatment discontinuation during the study can only be done for strict medical reasons by the treating physician with clear documentation and notification to the sponsor.

Trial locations and contacts

17 sites in 4 countries.

17 sites in 4 countries

United States12 sites
  • Kennedy Krieger Institute

    Baltimore, Maryland, 21205

  • Ohio State University

    Columbus, Ohio, 43221

  • University of Florida

    Gainesville, Florida, 32610

  • University of California Irvine

    Irvine, California, 92868

  • University of Kansas Medical Center

    Kansas City, Kansas, 66160

  • University of California Los Angeles (UCLA)

    Los Angeles, California, 90095

  • Virginia Commonwealth University

    Richmond, Virginia, 23298

  • University of Rochester Medical Center

    Rochester, New York, 14642

  • University of Utah

    Salt Lake City, Utah, 84132

  • University of Washinton Medical Center

    Seattle, Washington, 98195

  • Washington University School of Medicine

    St Louis, Missouri, 63110

  • University of Massachusetts Memorial Medical Center

    Worcester, Massachusetts, 01655

Other trials in United States

Canada2 sites
  • Montreal Neurological Institute and Hospital

    Montreal, Quebec, H3A 2B4

  • Ottawa Hospital Research Institute

    Ottawa, Ontario, K1Y 4E9

Other trials in Canada

Spain2 sites
  • Hospital de la Sta Creu i St Pau

    Barcelona, 08041

  • Hospital UiP La Fe

    Valencia, 46026

Other trials in Spain

France1 site
  • CHU de NICE- CHU pasteur2

    Nice, 06001

Other trials in France

About this study

Official title: A Phase 2, Randomized, Double-Blind, Placebo-Controlled, 48-Week, Parallel-Group Study of the Efficacy and Safety of Losmapimod in Treating Subjects With Facioscapulohumeral Muscular Dystrophy (FSHD) With Open-Label Extension (OLE)

This study is an open-label extension to evaluate the safety and tolerability of long-term dosing of Losmapimod in patients with FSHD1 who participated in the ReDux4 study.

Read the detailed description

This study is an open-label extension study to evaluate the safety and tolerability of long-term dosing of Losmapimod in patients with FSHD1 who participated in the ReDux4 study.

This study is a multi-center clinical trial. It will be conducted in North America, Canada and Europe. Only patients who participated and competed all study procedures in the ReDUX4 Study treatment period will be eligible to participate in this open label extension study.

Patients who complete the randomized, placebo-controlled portion of the study will have the option to roll over into the open-label extension study.

Patients will receive 15 mg of losmapimod by mouth twice daily for a total of 30 mg by mouth daily. All patients will attend clinic visits approximately every 12 weeks.

Participation in this open-label extension study will continue until 90 days after losmapimod becomes commercially available, the patient withdraws from the study, or the Sponsor decides to close the study.

The primary endpoint of the study is to evaluate the safety and tolerability of long-term dosing of losmapimod in patients with FSHD.

Being tested
Losmapimod
Keywords
FSHD, FSHD1, Muscular Dystrophy, Muscular Dystrophies, Facioscapulohumeral Muscular Disorders, Musculoskeletal Diseases, Neuromuscular Diseases
Medical subject headings
Muscular Dystrophy, Facioscapulohumeral, Muscular Dystrophies, Musculoskeletal Diseases, Neuromuscular Diseases

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • LosmapimodDrug

    Patients will receive Losmapimod 15 mg by mouth twice daily for a total of 30 mg daily until 90 days after commercial drug is available post regulatory approval or until the study is discontinued by the Sponsor. The study drug should be taken with food and the date and time of each dose taken should be recorded in the subject diary.

Study groups in NCT04264442
Study groupRoleWhat they receive
LosmapimodExperimentalFSHD1 patients with genetic confirmation will receive Losmapimod 15 mg by mouth twice daily for a total of 30 mg daily until 90 days after commercial drug is available post regulatory approval or until the study is discontinued by the Sponsor.
Receives: Drug: Losmapimod

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Number of Participants Reporting Serious Treatment Emergent Adverse Events (Serious TEAEs) and TEAEs

    A TEAE is an adverse event that begins on or after the first dose of study drug and on or before the stop of study drug plus 7 days or begins before the first dose of study drug and worsens on or after the first dose of study drug and on or before the stop of study drug plus 7 days. An adverse event with completely missing onset and end dates was considered as TEAE. An adverse event with missing onset date but the end date is on or after the first dose of study drug and before the stop of study drug plus 7 days was considered a TEAE.

    Measured: Up to 57 months

  2. Number of Participants With Clinically Significant Changes in Chemistry Parameters

    Blood samples were collected for the analysis of chemistry parameters: Glucose, sodium, potassium, calcium, inorganic phosphate, total protein, albumin, blood urea nitrogen, creatinine, total bilirubin, alkaline phosphatase, aspartate aminotransferase, alanine aminotransferase, gamma glutamyl transferase and creatine phosphokinase.

    Measured: Up to 57 months

  3. Number of Participants With Clinically Significant Changes in Hematology Parameters

    Blood samples were collected for the analysis of hematology parameters: hemoglobin (including mean corpuscular volume), mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, hematocrit, red blood cell count, total white blood cell count, platelet count. Differential blood counts, including basophils, eosinophils, neutrophils, lymphocytes, and monocytes

    Measured: Up to 57 months

  4. Number of Participants With Clinically Significant Changes in Serum Coagulation Parameters

    Blood samples were collected for the analysis of Serum coagulation parameters: International normalized ratio, prothrombin time, partial thromboplastin time.

    Measured: Up to 57 months

  5. Number of Participants With Clinically Significant Changes in Urinalysis

    Urine samples were collected for the analysis of urinalysis parameters: Leucocytes, blood, nitrite, protein, urobilinogen, bilirubin, pH, specific gravity, ketones, glucose.

    Measured: Up to 57 months

  6. Number of Participants With Clinically Significant Changes in Vital Parameters

    Vital parameters including pulse rate, respiration rate, blood pressure, and temperature were measured in seated or recumbent for at least 5 minutes. Data for number of participants with abnormal clinically significant changes for vital signs have been presented.

    Measured: Up to 57 months

  7. Number of Participants With Clinically Significant Changes in Electrocardiogram (ECG) Parameters

    Twelve-lead ECGs was performed after participants has been recumbent for at least 5 minutes.

    Measured: Up to 57 months

  8. Number of Participants With Clinically Significant Changes in Physical Examinations

    Physical examinations included an evaluation of body systems, including but not limited to the following: skin; head, eyes, ears, nose, and throat; respiratory system; cardiovascular system; abdomen (liver, spleen); lymph nodes; neurological system; and musculoskeletal system.

    Measured: Up to 57 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted11 Feb 2020
  2. Study start13 Feb 2020
  3. Primary completion7 Nov 2024
  4. Study completion7 Nov 2024

Why it stopped: Sponsor Decision

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Model description
This study is part two of NCT04003974 which was a randomized, double-blind placebo-controlled treatment period for 48 weeks. This study is an open-label extension with losmapimod in patients with FSHD1.
Masking
None (open label)
Enrolment
76 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04264442
Sponsor's protocol ID
FIS-002-2019 OLE
Status last verified
Sep 2025
First submitted
30 Jan 2020
Last updated
30 Sep 2025
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Publications

  • Barbour AM, Sarov-Blat L, Cai G, Fossler MJ, Sprecher DL, Graggaber J, McGeoch AT, Maison J, Cheriyan J. Safety, tolerability, pharmacokinetics and pharmacodynamics of losmapimod following a single intravenous or oral dose in healthy volunteers. Br J Clin Pharmacol. 2013 Jul;76(1):99-106. doi: 10.1111/bcp.12063.

    PubMed 23215699
  • Cheriyan J, Webb AJ, Sarov-Blat L, Elkhawad M, Wallace SM, Maki-Petaja KM, Collier DJ, Morgan J, Fang Z, Willette RN, Lepore JJ, Cockcroft JR, Sprecher DL, Wilkinson IB. Inhibition of p38 mitogen-activated protein kinase improves nitric oxide-mediated vasodilatation and reduces inflammation in hypercholesterolemia. Circulation. 2011 Feb 8;123(5):515-23. doi: 10.1161/CIRCULATIONAHA.110.971986. Epub 2011 Jan 24.

    PubMed 21262998
  • de Greef JC, Lemmers RJ, van Engelen BG, Sacconi S, Venance SL, Frants RR, Tawil R, van der Maarel SM. Common epigenetic changes of D4Z4 in contraction-dependent and contraction-independent FSHD. Hum Mutat. 2009 Oct;30(10):1449-59. doi: 10.1002/humu.21091.

    PubMed 19728363
  • Han JJ, Kurillo G, Abresch RT, de Bie E, Nicorici A, Bajcsy R. Reachable workspace in facioscapulohumeral muscular dystrophy (FSHD) by Kinect. Muscle Nerve. 2015 Feb;51(2):168-75. doi: 10.1002/mus.24287. Epub 2014 Nov 19.

    PubMed 24828906
  • Jagannathan S, Shadle SC, Resnick R, Snider L, Tawil RN, van der Maarel SM, Bradley RK, Tapscott SJ. Model systems of DUX4 expression recapitulate the transcriptional profile of FSHD cells. Hum Mol Genet. 2016 Oct 15;25(20):4419-4431. doi: 10.1093/hmg/ddw271.

    PubMed 28171552
  • Statland JM, Tawil R. Risk of functional impairment in Facioscapulohumeral muscular dystrophy. Muscle Nerve. 2014 Apr;49(4):520-7. doi: 10.1002/mus.23949. Epub 2014 Feb 10.

    PubMed 23873337
  • Wang LH, Friedman SD, Shaw D, Snider L, Wong CJ, Budech CB, Poliachik SL, Gove NE, Lewis LM, Campbell AE, Lemmers RJFL, Maarel SM, Tapscott SJ, Tawil RN. MRI-informed muscle biopsies correlate MRI with pathology and DUX4 target gene expression in FSHD. Hum Mol Genet. 2019 Feb 1;28(3):476-486. doi: 10.1093/hmg/ddy364.

    PubMed 30312408

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Losmapimod in people with Facioscapulohumeral Muscular Dystrophy (FSHD), run by Fulcrum Therapeutics at 17 sites in 4 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 5 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: stopped early, as of the sponsor's last update on 30 Sep 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 17 sites in United States, Canada, Spain, France. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 30 Sep 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Number of Participants Reporting Serious Treatment Emergent Adverse Events (Serious TEAEs) and TEAEs (time frame: Up to 57 months). The study lists 8 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04264442, which also lists 7 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 30 Sep 2025.

Free account

Log in to keep searching

You’ve used your 3 free searches. AzTrials is free: log in or create a free account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in