Investigating Exercise in Myotonic Dystrophy Type 2 (DM2)

Not Applicable

Recruiting

• Conditions: Myotonic Dystrophy 2

• Registration Number: NCT06716931
• Lead Sponsor: Massachusetts General Hospital

Brief Summary

An exercise regimen (PRIME: Proximal Resistance In-House Movement Exercise) has been designed for patients with myotonic dystrophy type 2 (DM2). The hypothesis is that this patient-friendly physical therapist (PT)-guided exercise program associates with improved functional capacity and muscle composition in DM2 in this two-period two-sequence cross-over study. Thus, participant will be randomized to one of the three possible groups. Participants in GROUP A will perform exercise routine in clinic under the direct supervision of a physical therapist twice a week for the first three months, then they will continue with same exercise routine at home for the last 3 months on their own. Participants in GROUP B will perform exercise routine virtually under the direct supervision of a physical therapist twice a week for the first three months, then they will continue with same exercise routine at home for the last 3 months on their own. Participants in GROUP C will perform exercise routine on their own during the first 3 months, then they will perform exercise routine virtually under the direct supervision of a physical therapist. Each group will include around 8 participants. Duration of the study is 6 months. In addition to exercise sessions, participants will have evaluation of their strength, motor function and muscle composition at three time points: initiation, 3 months and completion of the study at 6 months. Muscle composition will be assessed by electrical impedance myography which is a portable, non-invasive, painless and non-radiation tool that applies a weak high multifrequency electrical current to the examined muscle and allows to obtain information about its composition.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2024-10-30
• Status Verified: 2024-11
• Study Start: 2024-12-01
• Study First Submitted QC: 2024-12-03
• Last Update Submitted: 2024-12-03
• Study First Posted: 2024-12-04
• Last Update Posted: 2024-12-04
• Primary Completion: 2026-03-01
• Study Completion: 2026-03-01

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 24

Inclusion Criteria

• Patients with genetically confirmed myotonic dystrophy 2 (DM2) who are ≥18 and ≤ 70 years old.
• Patients are ambulatory without need of any assistance or device.
• Patients have a normal ECG within the 3 months prior to Screening visit (of note, patients with DM2 are recommended to have routine ECG as part of patient care. So, this ECG will be done as part of patient care).
• Body mass index (BMI) ≥20 and ≤30.

Exclusion Criteria

• Subjects younger than 18 years old or older than 70 years old.
• Inability or unwillingness of the subject to give written informed consent.
• Subjects with pacemaker.
• Blood pressure <90/50 mmHg or >160 mmHg/90 mmHg at Screening visit
• Resting heart rate of <60 or >100 beats/minute at Screening visit.
• Any fall within the last six months.
• Any history of syncopal episodes or family history of sudden death.
• Patients who are pregnant or plan to become pregnant. A urine pregnancy test will be performed at visit 1 and 3 for women of childbearing age. If positive or if subject is planning to become pregnant, subject will be not eligible for the study.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Primary Outcome Measures

Name	Time	Method
Manual Muscle Test (MMT)	From enrollment to the end of treatment at 6 months	Score of manual muscle strength test scale. This is a strength exam at bedside of muscle groups
Six-minute walking test	From enrollment to the end of treatment at 6 months	Distance in meters that subject can walk in six minutes

Secondary Outcome Measures

Name	Time	Method
Quantitative myometry	From enrollment to the end of treatment at 6 months	Muscle dynamometry of different muscle groups measured in kilograms
Muscle resistance/reactance measures in ohms	From enrollment to the end of treatment at 6 months	using electrical impedance myography, resistance and reactance measures in ohms will be obtained simultaneously from each examined muscle

Trial Locations

Locations (1)

Neuromuscular Diagnostic Center. Massachusetts General Hospital; 🇺🇸 Boston, Massachusetts, United States