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ARCT-810

Phase 2

OTC Deficiency | Monoclonal antibody | Rare Disease |Arcturus Therapeutics Holdings Inc.|Trials Updated: Mar 17, 2025

ARCT-810 development status

Highest phase Phase 2
Registered trials 4 across 1 sponsor since Jun 2020

ARCT-810 target and mechanism

Molecular targetOTC
ModalityMonoclonal antibody

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDDMC
Total Trials3
Total Enrollment55

FDA Designations

ORPHAN_DRUGFAST_TRACKRARE_PEDIATRIC_DISEASE

ARCT-810 clinical trials

ARCT-810 · 3 trials · 3 indications

Phase 2 1Phase 1 2
NCT06488313A Study to Evaluate the Pharmacodynamics and Safety of ARCT-810 in Participants With OTCDOTC Deficiency
RECRUITING9 Analytics
PHASE2RECRUITING
A Study to Evaluate the Pharmacodynamics and Safety of ARCT-810 in Participants With OTCD
OTC DeficiencyUnlock trial analytics

Study Endpoints

Primary Endpoints

Incidence, severity and dose-relationship of adverse events (AEs)
Day 85

Safety and tolerability of ARCT-810 assessed by incidence, severity, and dose-relationship of AEs

Incidence, severity and dose-relationship of AEs
4 weeks

Safety and tolerability of ARCT-810 assessed by determining the incidence, severity and dose-relationship of AEs by dose

Secondary Endpoints

Stable isotope ureagenesis assay values (AUC of first isotope)
Up to Day 85
Stable isotope ureagenesis assay values (AUC of second isotope)
Up to Day 85
Fasting plasma ammonia
Up to Day 85
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
ARCT-810EXPERIMENTALParticipants will receive up to 5 IV infusions of ARCT-810 administered at 14-day intervals.
PlaceboPLACEBO_COMPARATORSingle doses of 0.9% Saline administered intravenously

Interventions

NameTypeDescription
ARCT-810BIOLOGICALARCT-810 is an investigational medicinal product comprising Ornithine Transcarbamylase (OTC) messenger RNA (mRNA) formulated in a lipid nanoparticle (LNP).
PlaceboOTHERThe placebo for this study is 0.9% sterile saline.
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Eligibility Criteria

Age Range12 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: 1. Willingness and ability to comply with all the protocol requirements, complete all study visits and sign informed consent. 2. Males and Females aged ≥12 years, at Screening. 3. Documented clinical diagnosis of OTC deficiency. 4. History of symptomatic hyperammonemia or elevat...

Countries:United StatesNew Zealand
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Frequently asked questions about ARCT-810

What is ARCT-810 used for in ornithine transcarbamylase deficiency?

ARCT-810 is an investigational therapy being developed for ornithine transcarbamylase deficiency, or OTCD, a rare inherited urea cycle disorder. It is designed to address the underlying enzyme deficiency. Arcturus Therapeutics is evaluating it in clinical trials, including a Phase 2 study in participants with OTCD.

What does ARCT-810 target?

ARCT-810 targets ornithine transcarbamylase, the enzyme encoded by the OTC gene that is deficient in OTCD. By targeting OTC, the therapy aims to restore or replace the missing enzyme activity in patients. The drug is being developed as a treatment for this rare metabolic disorder.

Who is developing ARCT-810?

ARCT-810 is being developed by Arcturus Therapeutics Holdings Inc., which trades on the Nasdaq under the ticker ARCT. The company is advancing the candidate for ornithine transcarbamylase deficiency and holds orphan drug, fast track, and rare pediatric disease designations from the FDA for the program.

What phase is ARCT-810 in?

ARCT-810 is in Phase 2 clinical development. A Phase 2 study evaluating pharmacodynamics and safety in participants with OTCD is currently recruiting. Earlier Phase 1 and Phase 1b studies in healthy adults and stable adult OTCD patients have been completed. The drug remains investigational and has not been approved by the FDA.

What clinical trials is ARCT-810 in?

ARCT-810 has been studied in three registered trials. NCT06488313 is a recruiting Phase 2 study in participants with OTCD. NCT04442347 was a completed Phase 1b study in stable adults with OTCD, and NCT04416126 was a completed Phase 1 study in healthy adult volunteers. Total enrollment across these studies is 46 participants.