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INS1201

Phase 1

Duchenne Muscular Dystrophy | Gene therapy | Neurology |Insmed Incorporated|Last Updated: May 18, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment12
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06817382A Study to Investigate the Safety and Biodistribution of a Single Intrathecal (IT) Injection of INS1201 in Ambulatory Males With Duchenne Muscular Dystrophy (DMD)PHASE1 RECRUITING 12Jul 22, 2025Mar 31, 2028May 18, 202610 United States
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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 — 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)
LOWMay 26, 2026NCT06817382primaryCompletionDate: changed
LOWMay 24, 2026NCT06817382studyFirstPostDate: changed