Safety, Tolerability, PK, and PD Study of PGN-EDODM1 in Participants With Myotonic Dystrophy Type 1

NCT ID: NCT06204809

Last Updated: 2025-10-06

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

ACTIVE_NOT_RECRUITING

Clinical Phase

PHASE1

Total Enrollment

24 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-12-12

Study Completion Date

2025-10-31

Brief Summary

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The primary purpose of the study is to evaluate the safety and tolerability of single intravenous (IV) doses of PGN-EDODM1 administered to participants with Myotonic Dystrophy Type 1 (DM1).

The study consists of 2 periods: A Screening Period (up to 30 days) and a Treatment and Observation Period (16 weeks).

Detailed Description

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Conditions

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Myotonic Dystrophy 1

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Study Groups

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PGN-EDODM1

PGN-EDODM1 for infusion

Group Type EXPERIMENTAL

PGN-EDODM1 for infusion

Intervention Type DRUG

Single dose of PGN-EDODM1 by intravenous (IV) infusion

Placebo

0.9% NaCl

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type OTHER

Administered by IV infusion

Interventions

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PGN-EDODM1 for infusion

Single dose of PGN-EDODM1 by intravenous (IV) infusion

Intervention Type DRUG

Placebo

Administered by IV infusion

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Confirmed diagnosis of DM1, as defined as having a repeat sequence in the DMPK gene with at least 100 CTG repeats
* Medical Research Council (MRC) score of ≥ Grade 4- in bilateral tibialis anterior (TA) muscles (the ability to move through full range of motion and hold against at least moderate pressure from the examiner)
* Presence of myotonia

Exclusion Criteria

* Congenital DM1
* Known history or presence of any clinically significant conditions that may interfere with study safety assessments
* Abnormal laboratory tests at screening
* Medications specific for the treatment of myotonia within 2 weeks prior to screening
* Percent predicted forced vital capacity (FVC) \<40%
Minimum Eligible Age

18 Years

Maximum Eligible Age

60 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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PepGen Inc

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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UCI Center for Clinical Research

Irvine, California, United States

Site Status

Stanford University

Palo Alto, California, United States

Site Status

Rare Disease Research

Atlanta, Georgia, United States

Site Status

University of Kansas Medical Center

Fairway, Kansas, United States

Site Status

Massachusetts General Hospital

Boston, Massachusetts, United States

Site Status

University of Rochester Medical Center

Rochester, New York, United States

Site Status

Virginia Commonwealth University

Richmond, Virginia, United States

Site Status

University of Calgary

Calgary, Alberta, Canada

Site Status

Ottawa Hospital Research Institute (OHRI)

Ottawa, Ontario, Canada

Site Status

CIUSSS du Saguenay-Lac-Saint-Jean

Chicoutimi, Quebec, Canada

Site Status

University College London Hospital

London, UK, United Kingdom

Site Status

Salford Royal Hospital

Salford, , United Kingdom

Site Status

Countries

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United States Canada United Kingdom

Other Identifiers

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PGN-EDODM1-101

Identifier Type: -

Identifier Source: org_study_id

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