Recent Updates
Recently added Catalysts

PM577a

Phase 1

Wilson Disease | Small molecule | Rare Disease |Prime Medicine, Inc.|Trials Updated: Oct 1, 2026

PM577a development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since Aug 2026

PM577a target and mechanism

Molecular targetATP7B
ModalitySmall molecule

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

UNCONTROLLEDDMC
Total Trials1
Total Enrollment42

FDA Designations

RARE_PEDIATRIC_DISEASE

PM577a clinical trials

PM577a · 1 trial · 3 indications

Phase 1 1
NCT07748403A Study of the Safety and Efficacy of Prime Editing (PM577) in Participants With Wilson Disease (WD)Wilson Disease
RECRUITING42 Analytics
PHASE1RECRUITING
A Study of the Safety and Efficacy of Prime Editing (PM577) in Participants With Wilson Disease (WD)
Wilson DiseaseUnlock trial analytics

Study Endpoints

Primary Endpoints

Safety and tolerability of PM577a. Quantified by frequency and severity of treatment emergent adverse events (TEAEs).
Post-infusion through Week 48

Secondary Endpoints

Frequency and severity of Dose Limiting Toxicities (DLTs)
Infusion through the 14-day post infusion DLT observation period
Evidence of improved copper metabolism based on meeting the criteria to stop standard of care (SOC) therapy (chelation or zinc), including stable or improving non-ceruloplasmin bound copper levels and liver function tests.
Infusion through Week 48
Percent of participants with non-ceruloplasmin bound copper (NCC)
Weeks 12, 24, and 48 post-infusion
Unlock Study Endpoints

Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
PM577aEXPERIMENTALPM577a is a sterile suspension of lipid nanoparticle (LNP)-formulated Prime Editors (PEs) intended for single dose intravenous (IV) infusion for the treatment of Wilson disease (WD).

Interventions

NameTypeDescription
PM577aDRUGPM577a is being evaluated in participants with Wilson disease caused by biallelic pathogenic, likely pathogenic, or suspected pathogenic ATP7B variants, including at least one p.H1069Q allele.
Unlock Study Design Details

Eligibility Criteria

Age Range12 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites4

Inclusion Criteria: * Confirmed Wilson Disease (WD) diagnosis as determined by medical history consistent with WD * Historical genetic analysis demonstrating biallelic pathogenic, likely pathogenic, or suspected pathogenic ATP7B variants, including at least one p.H1069Q allele. * Treated and stable...

Countries:United StatesNew Zealand
Unlock Eligibility Criteria

Recent Changes (Last 90 Days)

LOWOct 1, 2026NCT07748403lastUpdatePostDate: changed
LOWOct 1, 2026NCT07748403lastUpdatePostDate: changed
LOWSep 16, 2026NCT07748403lastUpdatePostDate: changed
LOWSep 16, 2026NCT07748403lastUpdatePostDate: changed
LOWSep 16, 2026NCT07748403lastUpdatePostDate: changed
LOWSep 16, 2026NCT07748403lastUpdatePostDate: changed
LOWSep 10, 2026NCT07748403lastUpdatePostDate: changed
LOWSep 10, 2026NCT07748403lastUpdatePostDate: changed
LOWSep 3, 2026NCT07748403startDate: changed
LOWSep 3, 2026NCT07748403startDate: changed
LOWSep 1, 2026NCT07748403Status: NOT_YET_RECRUITING → RECRUITING
LOWSep 1, 2026NCT07748403Status: NOT_YET_RECRUITING → RECRUITING
LOWAug 11, 2026NCT07748403lastUpdatePostDate: changed
LOWAug 11, 2026NCT07748403lastUpdatePostDate: changed
LOWAug 5, 2026NCT07748403NEW_TRIAL: changed

Frequently asked questions about PM577a

What is PM577a?

PM577a is an investigational small molecule developed by Prime Medicine, Inc. for Wilson Disease, a rare inherited disorder of copper metabolism. It is being studied in a Phase 1 clinical trial in participants aged 12 years and older in the United States and New Zealand. It has received a Rare Pediatric Disease designation from the FDA.

What is PM577a used for in Wilson Disease?

PM577a is being developed as a treatment for Wilson Disease, a rare genetic condition that causes copper to accumulate in the body. The Phase 1 study is evaluating its safety and efficacy in participants with Wilson Disease. It is investigational and has not been approved for any indication.

What does PM577a target?

PM577a targets ATP7B, the copper-transporting ATPase that is defective in Wilson Disease. By acting on this molecular target, the small molecule is intended to address the underlying copper metabolism defect. The target is central to the disease biology, as ATP7B mutations cause impaired copper excretion.

Who makes PM577a?

PM577a is developed by Prime Medicine, Inc., a biotechnology company traded under the ticker PRME. Prime Medicine is the sponsor of the ongoing Phase 1 trial of PM577a in Wilson Disease. The company focuses on gene editing and related therapeutic approaches.

What phase is PM577a in?

PM577a is in Phase 1 clinical development. The single ongoing trial is a Phase 1 study that is currently recruiting participants. It is an investigational therapy and has not been approved by the FDA for Wilson Disease or any other condition.

What clinical trials is PM577a in?

PM577a is being studied in one clinical trial, NCT07748403, titled "A Study of the Safety and Efficacy of Prime Editing (PM577) in Participants With Wilson Disease (WD)." This Phase 1 trial is recruiting 42 participants aged 12 years and older in the United States and New Zealand. It is an uncontrolled, non-randomized study.