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INS1201

Phase 1

Duchenne Muscular Dystrophy | Gene therapy | Neurology |Insmed Incorporated|Last Updated: Jul 28, 2026

Target and mechanism

Molecular targetnull
Target classNull
ModalityGene therapy

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment12

FDA Designations

No designations recorded

Clinical trial landscape

INS1201 · 1 trial · 1 indication

Phase 1 1
NCT06817382A Study to Investigate the Safety and Biodistribution of a Single Intrathecal (IT) Injection of INS1201 in Ambulatory Males With Duchenne Muscular Dystrophy (DMD)Duchenne Muscular Dystrophy
RECRUITING12 Analytics
PHASE1RECRUITING
A Study to Investigate the Safety and Biodistribution of a Single Intrathecal (IT) Injection of INS1201 in Ambulatory Males With Duchenne Muscular Dystrophy (DMD)
Duchenne Muscular DystrophyUnlock trial analytics

Study Endpoints

Primary Endpoints

Parts 1 and 2: Incidence and Severity of Treatment Emergent Adverse Events (TEAEs)
Up to Week 96

Secondary Endpoints

Parts 1 and 2: Recommended Phase 2 Dose (RP2D) of INS1201
Week 16
Parts 1 and 2: Change From Baseline in Quantity of Micro-Dystrophin Deoxyribonucleic Acid (DNA) as Measured by Droplet Digital Polymerase Chain Reaction (ddPCR) at Weeks 16 and 48
Baseline, Weeks 16 and 48
Parts 1 and 2: Change From Baseline in Micro-Dystrophin Protein Expression as Measured by Quantitative Protein Analysis at Weeks 16 and 48
Baseline, Weeks 16 and 48
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part 1: Cohort 1EXPERIMENTALParticipants aged 3 to \<5 years will receive a single dose level 1 of INS1201 by IT injection on Day 1.
Part 1: Cohort 2EXPERIMENTALParticipants aged 3 to \<5 years will receive a single dose level 2 of INS1201 by IT injection on Day 1.
Part 2: Cohort 3EXPERIMENTALParticipants aged 2 to \<3 years will receive a single dose level 1 of INS1201 by IT injection on Day 1.
Part 2: Cohort 4EXPERIMENTALParticipants aged 2 to \<3 years will receive a single dose level 2 of INS1201 by IT injection on Day 1.

Interventions

NameTypeDescription
INS1201GENETICSuspension for IT injection.
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Eligibility Criteria

Age Range2 Years to 4 Years
SexMALE
Healthy VolunteersNo
Study Sites10

Inclusion Criteria * Participant must be male at birth, 3 to \<5 years of age, inclusive (Part 1) and 2 to \<3 years of age (Part 2), at the time of legally authorized representative (LAR) signing and dating the informed consent form. * Ambulatory -as defined as the ability to walk at least 10 mete...

Countries:United States
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Recent Changes (Last 90 Days)

LOWJul 28, 2026NCT06817382lastUpdatePostDate: changed
LOWJul 28, 2026NCT06817382lastUpdatePostDate: changed
LOWJun 11, 2026NCT06817382lastUpdatePostDate: changed
LOWJun 11, 2026NCT06817382lastUpdatePostDate: changed

Frequently asked questions about INS1201

What is INS1201 used for in Duchenne Muscular Dystrophy?

INS1201 is an investigational gene therapy being developed for the treatment of Duchenne Muscular Dystrophy (DMD) in ambulatory males. It is administered as a single intrathecal injection. The drug is currently in Phase 1 clinical development and has not been approved by regulatory authorities.

Who makes INS1201?

INS1201 is being developed by Insmed Incorporated, a biopharmaceutical company traded on NASDAQ under the ticker symbol INSM. The company is conducting a Phase 1 clinical trial to evaluate the safety and biodistribution of this gene therapy in patients with Duchenne Muscular Dystrophy.

What phase is INS1201 in?

INS1201 is in Phase 1 clinical development. It is an investigational gene therapy for Duchenne Muscular Dystrophy and has not yet been approved by the FDA or any other regulatory agency. The ongoing Phase 1 trial is currently recruiting participants in the United States.

What clinical trials is INS1201 in?

INS1201 is being studied in a Phase 1 clinical trial registered as NCT06817382. This study investigates the safety and biodistribution of a single intrathecal injection of INS1201 in ambulatory males with Duchenne Muscular Dystrophy. The trial is recruiting 12 participants in the United States.

How is INS1201 administered?

INS1201 is administered as a single intrathecal injection, meaning it is delivered directly into the spinal fluid. This route of administration is being studied in a Phase 1 clinical trial for ambulatory males with Duchenne Muscular Dystrophy. The trial is currently recruiting participants.