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

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

  • Myotonic Dystrophy 1

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