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Zeleciment Rostudirsen

Phase 3

Duchenne Muscular Dystrophy (DMD) | Small molecule | Rare Disease |Dyne Therapeutics, Inc.|Last Updated: May 27, 2026

Target and mechanism

Molecular targetTfR1
ModalitySmall molecule

Also known as Zeleciment Rostudirsen (DYNE-251)

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment90

FDA Designations

No designations recorded

Clinical trial landscape

Zeleciment Rostudirsen · 1 trial · 13 indications

Phase 3 1
NCT07608432Efficacy, Safety, and Tolerability of Zeleciment Rostudirsen (DYNE-251) Administered Intravenously Every 4 Weeks in Ambulatory Participants With Duchenne Muscular Dystrophy (FORZETTO)Duchenne Muscular Dystrophy (DMD)
RECRUITING90 Analytics
PHASE3RECRUITING
Efficacy, Safety, and Tolerability of Zeleciment Rostudirsen (DYNE-251) Administered Intravenously Every 4 Weeks in Ambulatory Participants With Duchenne Muscular Dystrophy (FORZETTO)
Duchenne Muscular Dystrophy (DMD)Unlock trial analytics

Study Endpoints

Primary Endpoints

Rise From Floor (RFF) velocity
Baseline, Week 73

Secondary Endpoints

RFF (Rise From Floor) velocity
Baseline, up to Week 169
Stride Velocity 95th Percentile (SV95C)
Baseline, Week 73, up to Week 169
North Star Ambulatory Assessment (NSAA) Total Score
Baseline, Week 73, up to Week 169
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Placebo-Controlled Period: Zeleciment Rostudirsen (DYNE-251)EXPERIMENTALParticipants will be randomized to receive zeleciment rostudirsen, once every 4 weeks (Q4W) for up to 72 weeks.
Placebo-Controlled Period: PlaceboPLACEBO_COMPARATORParticipants will be randomized to receive placebo, Q4W for up to 72 weeks.
Open-Label Long-Term Extension Period: Zeleciment Rostudirsen (DYNE-251)EXPERIMENTALAll participants who complete the Placebo-Controlled Period of the study will receive zeleciment rostudirsen administered Q4W for up to 96 weeks.

Interventions

NameTypeDescription
Zeleciment Rostudirsen (DYNE-251)DRUGAdministered by IV infusion
PlaceboDRUGAdministered by IV infusion
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Eligibility Criteria

Age Range4 Years to 18 Years
SexMALE
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Ambulatory male with confirmed diagnosis of DMD and with a mutation in the dystrophin gene characterized by exon deletion amenable to exon 51 skipping . * Rise From Floor (RFF) time must be \< 10 seconds for both screening assessments . * Receiving a stable daily or weekend do...

Countries:United States
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Frequently asked questions about Zeleciment Rostudirsen

What is Zeleciment Rostudirsen used for in Duchenne Muscular Dystrophy?

Zeleciment Rostudirsen is an investigational small molecule being developed for the treatment of Duchenne Muscular Dystrophy (DMD). It is currently in Phase 3 clinical development and is being studied in ambulatory male participants with DMD, a rare genetic neuromuscular disease. The drug is administered intravenously every 4 weeks.

What does Zeleciment Rostudirsen target?

Zeleciment Rostudirsen targets TfR1, also known as the transferrin receptor 1. This molecular target is involved in cellular iron uptake and is highly expressed on muscle cells, which may allow for targeted delivery of the therapy to affected tissues in Duchenne Muscular Dystrophy.

Who makes Zeleciment Rostudirsen?

Zeleciment Rostudirsen is being developed by Dyne Therapeutics, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol DYN. The company is conducting a Phase 3 clinical trial of the drug in patients with Duchenne Muscular Dystrophy.

What phase is Zeleciment Rostudirsen in?

Zeleciment Rostudirsen is currently in Phase 3 clinical development. It is an investigational drug and has not been approved by regulatory authorities. The ongoing Phase 3 trial is recruiting participants to evaluate the efficacy, safety, and tolerability of the drug in ambulatory patients with Duchenne Muscular Dystrophy.

What clinical trials is Zeleciment Rostudirsen in?

Zeleciment Rostudirsen is being studied in the FORZETTO trial, registered as NCT07608432. This is a Phase 3, randomized, double-blind, placebo-controlled study with an enrollment target of 90 participants. The trial is recruiting male patients aged 4 years and older with Duchenne Muscular Dystrophy in the United States.

Is Zeleciment Rostudirsen the same as DYNE-251?

Yes, Zeleciment Rostudirsen is also known as DYNE-251. Both names refer to the same investigational drug being developed by Dyne Therapeutics for Duchenne Muscular Dystrophy. The clinical trial NCT07608432 uses the name DYNE-251 in its title, while Zeleciment Rostudirsen is the assigned nonproprietary name.