A Phase 1/2 Study of VX-670 in Adult Participants With Myotonic Dystrophy 1 (DM1)

NCT ID: NCT06185764

Last Updated: 2025-12-15

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

RECRUITING

Clinical Phase

PHASE1/PHASE2

Total Enrollment

36 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-02-20

Study Completion Date

2026-12-31

Brief Summary

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The purpose of the study is to evaluate the safety, tolerability, pharmacokinetics, and pharmacodynamics of VX-670 at different single and multiple doses in participants with DM1.

Detailed Description

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Conditions

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Myotonic Dystrophy Type 1 (DM1)

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

SEQUENTIAL

Primary Study Purpose

TREATMENT

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Study Groups

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Part A: Single Ascending Dose

Participants will be randomized to receive a single dose of different dose levels of VX-670.

Group Type EXPERIMENTAL

VX-670

Intervention Type DRUG

Solution for intravenous administration.

Part A: Placebo

Participants will be randomized to receive single dose of placebo matched to VX-670.

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type DRUG

Solution for intravenous administration.

Part B: Single and Multiple Ascending Dose

Participants will be randomized to receive single and multiple doses of different dose levels of VX-670. The dose levels will be determined based on the data from Part A.

Group Type EXPERIMENTAL

VX-670

Intervention Type DRUG

Solution for intravenous administration.

Part B: Placebo

Participants will be randomized to receive single or multiple doses of placebo matched to VX-670.

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type DRUG

Solution for intravenous administration.

Interventions

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VX-670

Solution for intravenous administration.

Intervention Type DRUG

Placebo

Solution for intravenous administration.

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

\- Documented clinical diagnosis of DM1 with age of onset greater than (\>) 1 year of age and documented positive genetic test for DM1 in the subject with cytosine thymine guanine (CTG) repeat of at least 100

Exclusion Criteria

\- History of any illness or any clinical condition as pre-specified in the protocol
Minimum Eligible Age

18 Years

Maximum Eligible Age

64 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Vertex Pharmaceuticals Incorporated

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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Stanford Neuromuscular Research

San Carlos, California, United States

Site Status RECRUITING

University of Florida Clinical Research Center

Gainesville, Florida, United States

Site Status RECRUITING

University of Kansas Medical Center

Fairway, Kansas, United States

Site Status RECRUITING

Boston Children's Hospital

Boston, Massachusetts, United States

Site Status RECRUITING

Washington University School of Medicine / St. Louis Children's Hospital

St Louis, Missouri, United States

Site Status RECRUITING

Wake Forest Baptist Health

Winston-Salem, North Carolina, United States

Site Status RECRUITING

University of Pennsylvania

Philadelphia, Pennsylvania, United States

Site Status RECRUITING

Virginia Commonwealth University (Sanger Hall)

Richmond, Virginia, United States

Site Status RECRUITING

Wesley Research Institute

Auchenflower, , Australia

Site Status RECRUITING

Neuroscience Clinical Trials Unit, Alfred Brain

Melbourne, , Australia

Site Status RECRUITING

Universitaire Ziekenhuizen Leuven - Campus Gasthuisberg

Leuven, , Belgium

Site Status RECRUITING

Hopital de Chicoutimi

Chicoutimi, , Canada

Site Status RECRUITING

Altasciences Montreal

Montreal, , Canada

Site Status RECRUITING

McGIll University

Montreal, , Canada

Site Status RECRUITING

University of Ottawa

Ottawa, , Canada

Site Status RECRUITING

CHU Research Centre of Quebec

Québec, , Canada

Site Status RECRUITING

Neuromuscular Reference Center Institute of Myology

Paris, , France

Site Status RECRUITING

Ludwig Maximilians Universitaet Muenchen

München, , Germany

Site Status RECRUITING

Centro Clinico NeMO

Milan, , Italy

Site Status RECRUITING

Maastricht University Medical Center

Maastricht, , Netherlands

Site Status RECRUITING

Hospital Universitario y Politécnico La Fe

Valencia, , Spain

Site Status RECRUITING

Clinical Research Facility, Queen Elizabeth University Hospital

Glasgow, , United Kingdom

Site Status RECRUITING

Leonard Wolfson Experimental Neurology Centre CRF

London, , United Kingdom

Site Status RECRUITING

St. George's University Hospital

London, , United Kingdom

Site Status RECRUITING

Salford Royal Hospital

Salford, , United Kingdom

Site Status RECRUITING

Royal Hallamshire Hospital

Sheffield, , United Kingdom

Site Status RECRUITING

Countries

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United States Australia Belgium Canada France Germany Italy Netherlands Spain United Kingdom

Central Contacts

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Medical Information

Role: CONTACT

617-341-6777

Other Identifiers

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2023-506028-10-00

Identifier Type: OTHER

Identifier Source: secondary_id

VX23-670-001

Identifier Type: -

Identifier Source: org_study_id

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