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PLN-74809

Phase 2

Primary Sclerosing Cholangitis | Small molecule | Other |Pliant Therapeutics, Inc.|Last Updated: Jan 23, 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
RandomizedDouble-BlindPLACEBO_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment121
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT04480840Phase 2a Evaluation of Safety, Tolerability, and Pharmacokinetics of PLN-74809 in Patients With Primary Sclerosing Cholangitis (PSC)PHASE2 COMPLETED 121Jul 27, 2020Mar 18, 2024Jan 23, 202660 United States, Australia +7
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Study Endpoints
Primary Endpoints
Number of Participants With Treatment Emergent Adverse Events
Up to 40 weeks

Nature and proportion of TEAEs between PLN-74809 and placebo groups. Treatment-emergent adverse events (TEAEs) are defined as AEs that emerged or worsened in severity after the first administration of study drug

Number of Participants With Serious Treatment Emergent Adverse Events
Up to 40 weeks

Nature and proportion of Serious TEAEs between PLN-74809 and placebo groups. An SAE was defined as an event that, at any dose, results in the following: death, a life-threatening situation; in-patient hospitalization or prolongation of existing hospitalization, persistent or significant disability/incapacity, a congenital anomaly/birth defect or a medically important event or reaction.

Secondary Endpoints
Assessment of PLN-74809 Total Plasma Concentrations at Week 12
Up to 12 weeks
Assessment of PLN-74809 Total Plasma Concentrations at Week 24
Up to 24 weeks
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
PlaceboPLACEBO_COMPARATORPlacebo (Part 1, 2, and 3)
PLN-74809 Dose Level 1EXPERIMENTALPart 1, Cohort 1 Dose: 40 mg, up to 12 weeks
PLN-74809 Dose Level 2EXPERIMENTALPart 2, Cohort 2 Dose: 80 mg, up to 12 weeks; PLN-74809 Dose Level 2 following PLN-74809 Dose Level 1
PLN-74809 Dose Level 3EXPERIMENTALPart 2, Cohort 3 Dose: 160 mg, up to 12 weeks; PLN-74809 Dose Level 3 following PLN-74809 Dose Level 1
PLN-74809 Dose Level 4EXPERIMENTALPart 3, Cohort 4 Dose: 320 mg, for at least 24 weeks and up to 48 weeks; PLN-74809 Dose Level 4 following PLN-74809 Dose Levels 2 and 3
Interventions
NameTypeDescription
PLN-74809DRUGPLN-74809
PlaceboDRUGPlacebo
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Eligibility Criteria
Age Range18 Years — 75 Years
SexALL
Healthy VolunteersNo
Study Sites60

Inclusion Criteria: * Established clinical diagnosis of large duct PSC based on an abnormal cholangiography as assessed by magnetic resonance cholangiopancreatography (MRCP), endoscopic retrograde cholangiopancreatography (ERCP), and/or percutaneous transhepatic cholangiopancreatography (PTC) in th...

Countries:United StatesAustraliaAustriaBelgiumCanadaFranceGermanyNetherlandsUnited Kingdom
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