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An Extension Study to Evaluate the Long-Term Safety and Clinical Activity of mRNA-3705 in Participants Previously Enrolled in Other Clinical Studies of mRNA-3705

Methylmalonic Acidemia

The primary objective of this study is to evaluate the long-term safety of mRNA-3705 administered to participants with isolated methylmalonic acidemia (MMA) due to methylmalonyl-coenzyme A mutase (MUT) deficiency who have previously participated in other clinical studies of mRNA-3705.

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Participation Requirements

  • Sex:

    ALL
  • Eligible Ages:

    1 and up

Participation Criteria

Inclusion Criteria:

* Completed the assigned dose regimen treatment time period in other clinical studies of mRNA-3705 or is eligible for early transition to this study because they missed more than 3 consecutive doses of study drug due to coronavirus disease 2019 (COVID-19) vaccination during the mRNA-3705-P101 study.
* Completed the End of treatment (EOT) Visit in Study mRNA-3705-P101 within 10 days of first dose of mRNA-3705 in the current study.

Exclusion Criteria:

* Not expected to receive clinical benefit from continued mRNA-3705 administration, in the opinion of the Investigator.
* Any clinical or laboratory abnormality or medical condition that, at the discretion of the Investigator, may put the individual at increased risk by participating in this study.
* History of liver and/or kidney transplant.

NOTE: Other inclusion and exclusion criteria may apply.

Study Location

Stollery Children's Hospital University of Alberta
Stollery Children's Hospital University of Alberta
Edmonton, Alberta
Canada

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Hospital For Sick Children
Hospital For Sick Children
Toronto, Ontario
Canada

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Study Sponsored By
ModernaTX, Inc.
Participants Required
More Information
Study ID: NCT05295433