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PRT12396

Phase 1

Polycythemia Vera (PV) | Small molecule | Oncology |Prelude Therapeutics Incorporated|Last Updated: May 29, 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
CONTROLLEDBiomarker
Total Trials1
Total Enrollment100
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT07469891A Phase 1 Study of PRT12396 in Participants With Select Myeloproliferative NeoplasmsPHASE1 RECRUITING 100Apr 29, 2026Apr 1, 2028May 29, 20263 United States
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Study Endpoints
Primary Endpoints
Dose limiting toxicity (DLT) of PRT12396
Through cycle 1 (4 weeks)

Incidence of dose limiting toxicities, defined according to protocol-specified criteria

Incidence and severity of Adverse events
Through study completion, an average of 2 years

Incidence and severity of treatment-emergent adverse events (AEs), graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE), Version 6.0

Adverse Events Leading to Dose Modifications or Discontinuation
Through study completion, an average of 2 years

Incidence of AEs leading to dose reductions, dose interruptions, treatment discontinuations, and clinically significant laboratory abnormalities

Maximum tolerated dose (MTD) and Recommended Dose(s) for Expansion (RDE[s]) of PRT12396
Through study completion, an average of 2 years

Determination of the maximum tolerated dose (MTD) and recommended dose(s) for expansion (RDE\[s\]) based on evaluation of DLTs, safety, and tolerability data

Secondary Endpoints
Hematologic Response Rate (PV)
Through study completion, an average of 2 years
Duration of Hematologic Response (PV)
Through study completion, an average of 2 years
Hematocrit Control Without Phlebotomy Requirements (PV)
Through study completion, an average of 2 years
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
PRT12396: MFEXPERIMENTALParticipants with myelofibrosis receive PRT12396, an investigational oral capsule, administered twice daily. The study includes a dose-escalation followed by dose-expansion at the recommended dose for expansion (RDE)
PRT12396: PVEXPERIMENTALParticipants with polycythemia vera receive PRT12396, an investigational oral capsule, administered twice daily. The study includes a dose-escalation followed by dose-expansion at the recommended dose for expansion (RDE)
Interventions
NameTypeDescription
PRT12396DRUGPRT12396 is an investigational oral capsule administered twice daily at the assigned dose level or RDE. Capsules are swallowed whole with water and may be taken one hour before or two hours after meals.
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites3

Inclusion Criteria: * Willing and able to comply with all scheduled visits, treatment plan, laboratory tests, lifestyle considerations (including contraception requirements), and other study procedures. * Confirmed diagnosis of PV or MF according to WHO 2016 or revised ICC/WHO 2022 criteria * Docum...

Countries:United States
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Recent Changes (Last 90 Days)
LOWMay 29, 2026NCT07469891lastUpdatePostDate: changed
LOWMay 29, 2026NCT07469891lastUpdatePostDate: changed
LOWMay 29, 2026NCT07469891lastUpdatePostDate: changed
LOWMay 26, 2026NCT07469891Status: NOT_YET_RECRUITING → RECRUITING
LOWMay 24, 2026NCT07469891studyFirstPostDate: changed