Recent Updates
Recently added Catalysts

PM359

Phase 1

Chronic Granulomatous Disease | Monoclonal antibody | Immunology |Prime Medicine, Inc.|Last Updated: Apr 6, 2026

Target and mechanism

Molecular targetNCF1
ModalityMonoclonal antibody

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

UNCONTROLLEDDMC
Total Trials1
Total Enrollment12

FDA Designations

RMATFAST_TRACKORPHAN_DRUGRARE_PEDIATRIC_DISEASE

Clinical trial landscape

PM359 · 1 trial · 2 indications

Phase 1 1
NCT06559176A Study of the Safety and Efficacy of Prime Editing (PM359) in Participants With p47phox Autosomal Recessive Chronic Granulomatous Disease (CGD )Chronic Granulomatous Disease
ENROLLING BY_INVITATION12 Analytics
PHASE1ENROLLING BY_INVITATION
A Study of the Safety and Efficacy of Prime Editing (PM359) in Participants With p47phox Autosomal Recessive Chronic Granulomatous Disease (CGD )
Chronic Granulomatous DiseaseUnlock trial analytics

Study Endpoints

Primary Endpoints

Safety of administration of PM359, as quantified by frequency of adverse events (AEs) after drug product infusion
PM359 infusion through Month 12 after PM359 infusion
Percentage of participants with sustained reconstitution of NADPH oxidase activity in neutrophils
At Month 6 and Month 12 after PM359 infusion, as compared to baseline

Secondary Endpoints

Frequency of all drug product-related AEs, ≥ Grade 3 AEs, and serious adverse events (SAEs)
Signing of ICF through Month 36 following PM359 infusion
Time to neutrophil engraftment
From PM359 infusion through engraftment, typically within 2-3 weeks but assessed up to 36 months
Transplant related mortality
From PM359 infusion, assessed at 100 Days and 1 Year post-PM359 infusion
Unlock Study Endpoints

Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
PM359EXPERIMENTALPM359 is an autologous CD34+ hematopoietic stem cell (HSC) suspension that is Prime Edited at the NCF1 locus resulting in expression of the p47phox protein.

Interventions

NameTypeDescription
PM359BIOLOGICALSingle dose of PM359 administered autologously by intravenous (I.V.) infusion following myeloablative conditioning with busulfan
Unlock Study Design Details

Eligibility Criteria

Age Range6 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites5

Inclusion Criteria: * Autosomal recessive Chronic Granulomatous Disease due to the delGT mutation in NCF1 causing dysfunction of p47phox * Treated and followed for at least the past 2 years in a specialized center * Willingness to participate in this study as well as a long-term follow-up study wit...

Countries:United StatesCanadaUnited Kingdom
Unlock Eligibility Criteria

Frequently asked questions about PM359

What is PM359 used for?

PM359 is an investigational gene therapy being developed for Chronic Granulomatous Disease (CGD), specifically p47phox autosomal recessive CGD. It is currently in Phase 1 clinical development and is not yet approved by the FDA.

What does PM359 target?

PM359 targets the NCF1 gene, which encodes the p47phox protein. It uses prime editing technology to correct mutations in NCF1, aiming to restore function in patients with p47phox autosomal recessive Chronic Granulomatous Disease.

Who makes PM359?

PM359 is being developed by Prime Medicine, Inc., a biopharmaceutical company. The company's stock trades under the ticker symbol PRME on the NASDAQ.

What phase is PM359 in?

PM359 is in Phase 1 clinical development. It is an investigational therapy and has not received FDA approval. The drug has been granted RMAT, Fast Track, Orphan Drug, and Rare Pediatric Disease designations by the FDA.

What clinical trials is PM359 in?

PM359 is being studied in a Phase 1 clinical trial with the identifier NCT06559176. This trial is enrolling by invitation and aims to evaluate the safety and efficacy of PM359 in participants with p47phox autosomal recessive Chronic Granulomatous Disease.

Is PM359 the same as a gene therapy for CGD?

PM359 is a prime editing gene therapy specifically designed for p47phox autosomal recessive Chronic Granulomatous Disease. It is being studied in a clinical trial enrolling patients aged 6 years and older in the United States, Canada, and the United Kingdom.