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PGN-EDODM1

Phase 2

Myotonic Dystrophy 1 | RNA-Based Therapies | Rare Disease |PepGen Inc.|Trials Updated: Jul 29, 2026

PGN-EDODM1 development status

Highest phase Phase 2
Registered trials 2 across 1 sponsor since Oct 2024

PGN-EDODM1 target and mechanism

Molecular targetDMPK CUG repeat expansion
ModalityRNA-Based Therapies

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials2
Total Enrollment72

FDA Designations

ORPHAN_DRUGFAST_TRACK

PGN-EDODM1 clinical trials

PGN-EDODM1 · 2 trials · 1 indication

Phase 2 2
NCT07220603An Open-Label Extension Study of PGN-EDODM1 in People With Myotonic Dystrophy Type 1 (FREEDOM-OLE)Myotonic Dystrophy 1
RECRUITING48 Analytics
NCT06667453A Clinical Study of PGN-EDODM1 in People With Myotonic Dystrophy Type 1Myotonic Dystrophy 1
RECRUITING24 Analytics
PHASE2RECRUITING
An Open-Label Extension Study of PGN-EDODM1 in People With Myotonic Dystrophy Type 1 (FREEDOM-OLE)
Myotonic Dystrophy 1Unlock trial analytics
PHASE2RECRUITING
A Clinical Study of PGN-EDODM1 in People With Myotonic Dystrophy Type 1
Myotonic Dystrophy 1Unlock trial analytics

Study Endpoints

Primary Endpoints

Safety and tolerability as assessed by number of participants with Adverse Events (AEs)
Baseline through Week 108

Secondary Endpoints

Maximum Observed Plasma Drug Concentration (Cmax) of PGN-EDODM1
Day 1 through Day 84
Time to Maximum Observed Plasma Drug Concentration (Tmax) of PGN-EDODM1
Day 1 through Day 84
Apparent Terminal Half-Life (t½) of PGN-EDODM1
Day 1 through Day 84
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
PGN-EDODM1EXPERIMENTALParticipants will receive doses of PGN-EDODM1 once every 4 weeks (Q4W)
PlaceboPLACEBO_COMPARATORParticipants randomized to the placebo arm will receive doses of saline (0.9% NaCl), once every 4 weeks (Q4W) for 12 weeks

Interventions

NameTypeDescription
PGN-EDODM1DRUGAdministered by intravenous (IV) infusion
PlaceboOTHERAdministered by intravenous (IV) infusion
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Eligibility Criteria

Age Range16 Years to 65 Years
SexALL
Healthy VolunteersNo
Study Sites3

Inclusion Criteria: * Participant has completed a prior study with PGN-EDODM1 Exclusion Criteria: * Abnormal laboratory tests at screening considered clinically significant by the Investigator * Use of an investigational drug (other than PGN-EDODM1), device, or product, within 30 days or 5 half-l...

Countries:CanadaNew ZealandSouth KoreaUnited Kingdom
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Frequently asked questions about PGN-EDODM1

What is PGN-EDODM1 used for?

PGN-EDODM1 is an investigational therapy being developed for the treatment of myotonic dystrophy type 1, a rare genetic disorder. It is in Phase 2 clinical development and has not been approved by the FDA. The drug has received Orphan Drug and Fast Track designations from the FDA for this indication.

What does PGN-EDODM1 target?

PGN-EDODM1 targets the DMPK CUG repeat expansion, the toxic RNA repeat that underlies myotonic dystrophy type 1. By aiming at this expanded repeat, the therapy is designed to address the root genetic cause of the disease rather than just its symptoms. It is a small molecule therapeutic.

Who is developing PGN-EDODM1?

PGN-EDODM1 is being developed by PepGen Inc., which trades on the Nasdaq under the ticker symbol PEPG. PepGen is a clinical-stage biotechnology company focused on rare disease therapies. The company is running two active Phase 2 trials of PGN-EDODM1 in myotonic dystrophy type 1.

What phase is PGN-EDODM1 in?

PGN-EDODM1 is in Phase 2 clinical development. It is an investigational drug and has not been approved by the FDA. Two Phase 2 trials are currently recruiting participants, and the program has received both Orphan Drug and Fast Track designations from the FDA.

What clinical trials is PGN-EDODM1 in?

PGN-EDODM1 is being studied in two recruiting Phase 2 trials: NCT06667453, a placebo-controlled study enrolling 24 participants across Canada, New Zealand, South Korea, and the United Kingdom, and NCT07220603, the FREEDOM-OLE open-label extension study enrolling 48 participants in Canada. Together these trials plan to enroll 72 participants.

Is PGN-EDODM1 approved by the FDA?

No, PGN-EDODM1 is not approved by the FDA. It is an investigational drug still in Phase 2 clinical development for myotonic dystrophy type 1. The FDA has granted it Orphan Drug and Fast Track designations, which are intended to support and expedite the development of therapies for serious conditions.