Purpose

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).

Condition

Eligibility

Eligible Ages
Between 18 Years and 50 Years
Eligible Genders
All
Accepts Healthy Volunteers
No

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% Note: Other inclusion and exclusion criteria may apply.

Study Design

Phase
Phase 1
Study Type
Interventional
Allocation
Randomized
Intervention Model
Parallel Assignment
Primary Purpose
Treatment
Masking
Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)

Arm Groups

ArmDescriptionAssigned Intervention
Experimental
PGN-EDODM1
PGN-EDODM1 for infusion
  • Drug: PGN-EDODM1 for infusion
    Single dose of PGN-EDODM1 by intravenous (IV) infusion
Placebo Comparator
Placebo
0.9% NaCl
  • Other: Placebo
    Administered by IV infusion

Recruiting Locations

Massachusetts General Hospital
Boston, Massachusetts 02114
Contact:
Thurman Wheeler, MD (PI)
617-726-7506

More Details

Status
Recruiting
Sponsor
PepGen Inc

Study Contact

PepGen
781-797-0979
clinicaltrials@pepgen.com

Notice

Study information shown on this site is derived from ClinicalTrials.gov (a public registry operated by the National Institutes of Health). The listing of studies provided is not certain to be all studies for which you might be eligible. Furthermore, study eligibility requirements can be difficult to understand and may change over time, so it is wise to speak with your medical care provider and individual research study teams when making decisions related to participation.