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BMN 351 Exon 51 Skipping Therapy for Duchenne Muscular Dystrophy: Phase 2 Extension Study

BioMarin BMN-351 Exon 51 Skipping Therapy Phase 2 Clinical Trial
Enrolling by InvitationPhase 2Exon Skipping

Study Overview

Age
4 years and older
Phase
Phase 2
Sponsor
BioMarin Pharmaceutical
Therapeutic Approach
Exon Skipping
Variant Requirement
Participants must have completed 351-201 without permanent discontinuation of the investigational medicinal product (IMP) or withdrawal from the study.
Eligible Sex
Male
Ambulation
Ambulatory
Study Start (Actual)
2026-04
Primary Completion (Estimated)
2031-12
Study Completion (Estimated)
2031-12
Enrollment (Estimated)
18
Countries
ItalyNetherlandsSpainTurkiyeUnited Kingdom

Study Requirements and Criteria

Steroid Use

Currently receiving treatment with oral corticosteroids, on a stable dose regimen during 351-201, and must remain on a consistent dose regimen throughout 351-202 or 351-203 except for modifications to accommodate changes in weight. Transition to the equivalent dose of vamorolone is permitted in 351-202 where approved in participating countries.

Inclusion Criteria

  • Willing and able to adhere to the study visit schedule and other protocol requirements
  • Willing to use contraception (sexually mature males) throughout the study and for 90 days after the final dose, if sexually active
  • Contraceptive use by males should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.
  • Willing and able to provide written assent (if required by local regulations or the IRB/IEC) after the nature of the study has been explained and prior to performance of any research-related procedure
  • Willing and able to provide written, signed informed consent as parent or guardian after the nature of the study has been explained and prior to performance of any research-related procedure

Exclusion Criteria

  • Have known coagulation disorder
  • Are taking any prohibited medications
  • any approved exon skipping therapy within 12 weeks prior to baseline or with any gene therapy for the treatment of DMD at any time
  • anti-coagulants, anti-thrombotics, or anti-platelet agents
  • immunosuppressants

Contact Information

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BioMarin BMN-351 Phase 2 Clinical Trial | DMD Warrior