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Safety and Efficacy of NMD670 in Adult Patients With Type 1 and Type 2 Charcot-Marie-Tooth Disease

A Phase 2a, Randomised, Double-Blind, Placebo-Controlled Study to Evaluate the Efficacy, Safety, and Tolerability of NMD670 Over 21 Days in Ambulatory Adult Patients With Type 1 and Type 2 Charcot-Marie-Tooth Disease

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06482437
Acronym
SYNAPSE-CMT
Enrollment
81
Registered
2024-07-01
Start date
2024-09-30
Completion date
2025-11-04
Last updated
2025-11-12

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Charcot-Marie-Tooth Disease

Brief summary

This Phase 2a study aims to evaluate the efficacy, safety and tolerability of NMD670 vs placebo administered twice a day (BID) for 21 days in ambulatory adult patients with Charcot-Marie-Tooth disease type 1 and type 2.

Interventions

DRUGNMD670

Tablets taken twice daily for 21 days

DRUGPlacebo

Tablets taken twice daily for 21 days

Sponsors

NMD Pharma A/S
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to 70 Years
Healthy volunteers
No

Inclusion criteria

* Male or female participants must be 18 to 70 years inclusive at the time of signing the ICF. * Diagnosis of CMT type 1 or 2 confirmed by genetic testing. * Body mass index between 18 and 35 kg/m2, inclusive, at screening, and with a minimum weight of 40 kg * Contraceptive use by men and women must be consistent with local regulations regarding the methods of contraception for those participating in clinical studies * Participant is capable of and has given signed informed consent

Exclusion criteria

* Participants with other significant disease that may interfere with the interpretation of study data (e.g., other neuromuscular diseases) and/or ability to complete the tests, in the opinion of the Investigator. * Participants with laboratory test result abnormalities at screening considered clinically significant by the Investigator. * Participants who have received treatment with another IMP within 30 days (or 5 half-lives of the medication, whichever is longer) prior to day 1. * Participants with history of poor compliance with relevant therapy in the opinion of the Investigator. * Female participants who plan to become pregnant during the study or are currently pregnant or breastfeeding.

Design outcomes

Primary

MeasureTime frame
Change from baseline to day 21 in 6-minute walk test total distance for NMD670 vs placeboBaseline to day 21

Secondary

MeasureTime frameDescription
Change from baseline to day 21 in the time to complete the 10MW/RT for NMD670 vs placeboBaseline to day 21
Change from baseline to day 21 in 6-minute walk test fatigue index for NMD670 vs placeboBaseline to day 21
Change from baseline to day 21 in Overall Neuropathy Limitation Scale total score and individual items for NMD670 vs placeboBaseline to day 21The Overall Neuropathy Limitation Scale consists of an arm and a leg scale. Scale goes from 0-12 and a higher score indicates worse symptomatology
Change from baseline to day 21 in CMT Health Index total score and individual domains for NMD670 vs placeboBaseline to day 21The CMT Health Index has 18 domains. Scale goes from 0-100 and a higher score indicates worse symptomatology
Change from baseline to day 21 in SF-36 total score and individual domains for NMD670 vs placeboBaseline to day 21The SF-36 has 8 domains. Scale goes from 0-100 and a lower score indicates worse symptomatology
Change from baseline to day 21 in jitter and blocking for NMD670 vs placeboBaseline to day 21
Incidence of treatment emergent adverse eventsOver 21 days of dosingSummarised per treatment
Incidence of serious treatment emergent adverse eventsOver 21 days of dosingSummarised per treatment
Incidence of clinically significant abnormalities on physical examinationsOver 21 days of dosingSummarised per treatment
Change from baseline to day 21 in CMT Functional Outcome Measure Total Score and Individual Items for NMD670 vs placeboBaseline to day 21CMT Functional Outcome Meausre is a 12-item scale. Scale goes from 0-100 and a higher score indicates worse symptomatology
Incidence of clinically significant vital signs abnormalitiesOver 21 days of dosingSummarised per treatment
Incidence of clinically significant ECG abnormalitiesOver 21 days of dosingSummarised per treatment
Incidence of Suicidal Ideation or Suicidal BehaviorOver 21 days of dosingSummarised per treatment
Incidence of clinically significant abnormalities on opthalmological examinationsFrom screening (day -28 to day -1) until follow up (day 28)]Summarised per treatment
Proportion of participants with clinically meaningful change from baseline in CMT-FOM total score and individual items for NMD670 vs placeboBaseline to day 21
Proportion of participants with clinically meaningful change from baseline in 10MW/RT for NMD670 vs placeboBaseline to day 21
Proportion of participants with clinically meaningful change from baseline in ONLS total score for NMD670 vs placeboBaseline to day 21
Proportion of participants with clinically meaningful change from baseline in CMT-HI total score and individual domains for NMD670 vs placeboBaseline to day 21
Proportion of participants with clinically meaningful change from baseline in SF-36 total score and individual domains for NMD670 vs placeboBaseline to day 21
Incidence of clinically significant abnormalities on safety laboratory parametersOver 21 days of dosingSummarised per treatment

Countries

Belgium, Denmark, France, Spain, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026