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mRNA-3927

Phase 1

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

Success Probability

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Trial Design

UNCONTROLLEDDMC
Total Trials2
Total Enrollment127

FDA Designations

No designations recorded

Clinical trial landscape

mRNA-3927 · 2 trials · 1 indication

Phase 1 2
NCT05130437A Study to Assess the Long-term Safety and Clinical Activity of mRNA-3927 in Participants Previously Enrolled in the mRNA-3927-P101 StudyPropionic Acidemia
RECRUITING50 Analytics
NCT04159103Open-Label Study of mRNA-3927 in Participants With Propionic AcidemiaPropionic Acidemia
RECRUITING77 Analytics
PHASE1RECRUITING
A Study to Assess the Long-term Safety and Clinical Activity of mRNA-3927 in Participants Previously Enrolled in the mRNA-3927-P101 Study
Propionic AcidemiaUnlock trial analytics
PHASE1RECRUITING
Open-Label Study of mRNA-3927 in Participants With Propionic Acidemia
Propionic AcidemiaUnlock trial analytics

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 to 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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Frequently asked questions about mRNA-3927

What is mRNA-3927 used for?

mRNA-3927 is an investigational therapy being developed for propionic acidemia, a rare inherited metabolic disorder. It is currently in Phase 1 clinical development and has not been approved by regulatory authorities. The drug is being studied in patients with this condition to assess its safety and clinical activity.

Who makes mRNA-3927?

mRNA-3927 is being developed by Moderna, Inc., a biotechnology company publicly traded under the ticker symbol MRNA on the NASDAQ. Moderna is conducting clinical trials to evaluate the safety and efficacy of this investigational therapy for propionic acidemia.

What phase is mRNA-3927 in?

mRNA-3927 is currently in Phase 1 clinical development. It is an investigational drug, meaning it has not yet been approved by the FDA or other regulatory agencies. The ongoing Phase 1 trials are designed to evaluate its safety, tolerability, and clinical activity in patients with propionic acidemia.

What clinical trials is mRNA-3927 in?

mRNA-3927 is being studied in two Phase 1 clinical trials. The first, NCT04159103, is an open-label study in participants with propionic acidemia. The second, NCT05130437, is a long-term safety and clinical activity study for participants previously enrolled in the first study. Both trials are currently recruiting.

How does mRNA-3927 work?

mRNA-3927 is a messenger RNA (mRNA) therapy designed to address the underlying genetic cause of propionic acidemia. While the specific molecular target is not disclosed, the therapy aims to provide instructions for cells to produce a functional protein that is deficient in this condition, potentially restoring metabolic function.