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Losmapimod

Phase 3

Facioscapulohumeral Muscular Dystrophy (FSHD) | Small molecule | Neurology |Fulcrum Therapeutics, Inc.|Trials Updated: Jul 10, 2024

Losmapimod development status

Highest phase Phase 3 (NCT05397470)
Phase scored for FULCPhase 2
Registered trials 7 across 2 sponsors since Dec 2009

Losmapimod target and mechanism

Molecular targetMAPK11, MAPK14
Target classInhibitor
ModalitySmall molecule

Also known as Losmapimod oral tablet

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment80

FDA Designations

FAST_TRACKORPHAN_DRUG

Losmapimod clinical trials

Losmapimod · 1 trial · 1 indication

Phase 2 1
NCT04003974Efficacy and Safety of Losmapimod in Subjects With Facioscapulohumeral Muscular Dystrophy (FSHD)Facioscapulohumeral Muscular Dystrophy (FSHD)
COMPLETED80 Analytics
PHASE2COMPLETED
Efficacy and Safety of Losmapimod in Subjects With Facioscapulohumeral Muscular Dystrophy (FSHD)
Facioscapulohumeral Muscular Dystrophy (FSHD)Unlock trial analytics

Study Endpoints

Primary Endpoints

Change From Baseline in Double Homeobox 4 (DUX4) Activity in Affected Skeletal Muscle
Baseline and Week 16 to Week 36

Skeletal muscle biopsies were collected at Baseline and post-Baseline. DUX4 activity in skeletal muscle biopsies was assessed by measuring expression levels of a panel of 6 genes known to be regulated by DUX4. Expression levels of genes were measured using a validated quantitative RT-PCR assay and expressed as Ct (PCR cycles). Raw Ct for each of the 6 genes was normalized to the specified reference genes to generate a normalized Ct. The DUX4 activity is the average of the normalized Cts of each of the identified 6 genes, where the Ct for each of the 6 genes is first normalized to reference genes before the average is generated. Change in Baseline is calculated as \[average delta Ct across the 6 genes post-baseline\] minus \[average delta Ct across the 6 genes at baseline\].

Secondary Endpoints

Number of Participants With Type of Adverse Events (AEs) to Losmapimod
Up to Week 48
Number of Participants With Severity of AEs to Losmapimod
Up to Week 48
Number of Participants With Relationship of AEs to Losmapimod
Up to Week 48
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
TreatmentEXPERIMENTALFSHD1 patients with genetic confirmation will receive Losmapimod 15 mg twice daily given as two 7.5 mg tablets per dose by mouth; for a total of 4 pills or 30 mg daily for 48 weeks.
PlaceboPLACEBO_COMPARATORFSHD1 patients with genetic confirmation will receive a Placebo twice daily given as two 7.5 mg tablets per dose by mouth; for a total of 4 pills or 30 mg daily for 48 weeks.

Interventions

NameTypeDescription
Losmapimod oral tabletDRUGLosmapimod will be administered with food when possible.
Placebo oral tabletDRUGPlacebo will be administered with food when possible
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Eligibility Criteria

Age Range18 Years to 65 Years
SexALL
Healthy VolunteersNo
Study Sites17

Inclusion Criteria: * The patient must have consented to participate and must have provided signed, dated and witnessed IRB-approved informed consent form that conforms to federal and institutional guidelines. * Male or female subjects * Confirmed diagnosis of FSHD1 with 1 to 9 repeats via assessme...

Countries:United StatesCanadaFranceSpain
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Frequently asked questions about Losmapimod

What is Losmapimod used for?

Losmapimod is being developed for the treatment of facioscapulohumeral muscular dystrophy (FSHD), a genetic muscle disorder. It is an investigational oral small molecule and is not approved for any indication. Fulcrum Therapeutics is evaluating it in a Phase 2 clinical program.

What does Losmapimod target?

Losmapimod targets MAPK11 and MAPK14, also known as p38 alpha and p38 beta mitogen-activated protein kinases. It acts as an inhibitor of these kinases. This mechanism is being studied for its potential effect in facioscapulohumeral muscular dystrophy.

Who is developing Losmapimod?

Losmapimod is being developed by Fulcrum Therapeutics, Inc., which trades on the Nasdaq under the ticker FULC. The company is responsible for its clinical development in facioscapulohumeral muscular dystrophy.

What phase is Losmapimod in?

Losmapimod is in Phase 2 clinical development for facioscapulohumeral muscular dystrophy. It is an investigational therapy and has not been approved by the FDA for any indication. The Phase 2 trial has been completed.

What clinical trials is Losmapimod in?

Losmapimod has been studied in a Phase 2 trial, NCT04003974, titled Efficacy and Safety of Losmapimod in Subjects With Facioscapulohumeral Muscular Dystrophy (FSHD). The trial was completed and enrolled 80 participants across the United States, Canada, France, and Spain.