Overview
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.
Description
Participants with isolated MMA due to MUT deficiency who were previously enrolled in other clinical studies of mRNA-3705 will have the option to enroll into this extension study provided all eligibility criteria have been met. The study will include 2 periods: 1) Treatment Period and 2) Follow-up Period (up to 2 years after the last dose of study drug).
Treatment Period will continue unless one of the following occurs: mRNA-3705 receives marketing approval and reimbursement in the country of origin of the participant (following market approval and access being in place, all participants who wish to continue treatment will be offered mRNA-3705 through market access, with the intent to prevent treatment interruption. Safety monitoring will be performed for all participants under treatment per market access requirements), the participant discontinues study drug, the participant is no longer receiving clinical benefit (in the opinion of the Investigator), or Sponsor discontinues the development of mRNA-3705.
Eligibility
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.