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mRNA-3927

Phase 1

Propionic Acidemia | Monoclonal antibody | Other |Moderna, Inc.|Last Updated: Mar 23, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
UNCONTROLLEDDMCBiomarker
Total Trials2
Total Enrollment127
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05130437A Study to Assess the Long-term Safety and Clinical Activity of mRNA-3927 in Participants Previously Enrolled in the mRNA-3927-P101 StudyPHASE1 RECRUITING 50Nov 9, 2021Dec 4, 2031Mar 23, 202622 United States, Canada +6
NCT04159103Open-Label Study of mRNA-3927 in Participants With Propionic AcidemiaPHASE1 RECRUITING 77Apr 15, 2021Aug 31, 2027Jan 22, 202635 United States, Canada +6
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Study Endpoints
Primary Endpoints
Number of Participants with Adverse Events (AEs), Serious AEs (SAEs), and AEs Leading to Discontinuation
Baseline through End of Study Visit (up to 8 years)
Part 1: Number of Participants with Treatment-emergent Adverse Event (TEAE), Serious Adverse Events (SAE) and TEAEs Leading to Discontinuation
Day 1 (initial mRNA-3927 dose) up to Week 150 (End of Study)
Part 2: Change in Annualized Frequency of Clinical Event Committee (CEC)-adjudicated Metabolic Decompensation Events (MDEs) During 12-month Treatment Period With mRNA-3927 Compared to Annualized Frequency of CEC-adjudicated MDE During Pretreatment Period
Pretreatment period (12 months before consent to first mRNA-3927 dose in the study) up to Month 12
Part 3: Number of Participants with TEAEs, SAEs, Adverse Events (AEs) of Special Interest (AESIs) and TEAEs Leading to Discontinuation
Day 1 up to Week 73
Secondary Endpoints
Annualized Frequency of Investigator-reported Metabolic Decompensation Events (MDEs)
Baseline through End of Study Visit (up to 8 years)
Annualized Frequency of Investigator-reported MDE-related Hospitalizations
Baseline through End of Study Visit (up to 8 years)
Annualized Frequency of Investigator-reported PA-related Hospitalizations
Baseline through End of Study Visit (up to 8 years)
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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
mRNA-3927EXPERIMENTALParticipants will receive the applicable dose identified during Study mRNA-3927-P101 (NCT04159103) on Day 1. The dose can be adjusted based on Sponsor recommendation.
Part 1 (Dose Optimization), Part 2 (Pivotal Study), and Part 3 (Infants)EXPERIMENTALPart 1 (Dose Optimization): Participants (≥1 year of age) will receive single dose of mRNA-3927 by intravenous (IV) infusion every 2 weeks (Q2W) or every 3 weeks (Q3W) for up to 10 doses. Part 2 (Pivotal Study): Participants (≥1 year of age) will receive single dose of mRNA-3927 (identified during Dose Optimization Phase) by IV infusion Q2W for up to 26 doses or approximately 12 months. Part 3: Participants (\<1 year of age) will receive single dose of mRNA-3927 (identified during Dose Optimization Phase) by IV infusion Q2W for up to 26 doses or approximately 12 months.
Interventions
NameTypeDescription
mRNA-3927BIOLOGICALmRNA-3927 dispersion for IV infusion
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Eligibility Criteria
Age Range1 Year — N/A
SexALL
Healthy VolunteersNo
Study Sites22

Inclusion Criteria: * Participated in Study mRNA-3927-P101. * Completed the EOT/ET visit in Study mRNA-3927-P101 and enroll in this study such that the first dose in this study is planned to be within 14±3 days of the last dose of mRNA-3927 in the mRNA-3927-P101 study. Exclusion Criteria: * Not e...

Countries:United StatesCanadaFranceJapanNetherlandsSaudi ArabiaSpainUnited Kingdom
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT04159103primaryCompletionDate: changed
LOWMay 26, 2026NCT05130437primaryCompletionDate: changed
LOWMay 24, 2026NCT04159103studyFirstPostDate: changed
LOWMay 24, 2026NCT05130437studyFirstPostDate: changed