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BIO89-100

Phase 2

NASH - Nonalcoholic Steatohepatitis | Small molecule | Infectious Disease |89bio, Inc.|Last Updated: Jan 6, 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 Trials2
Total Enrollment230
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT04929483Study Evaluating the Safety, Efficacy and Tolerability of BIO89-100 in Subjects With Biopsy-confirmed Nonalcoholic Steatohepatitis (NASH)PHASE2 COMPLETED 222Jun 4, 2021Oct 8, 2024Jan 6, 202689 United States, Puerto Rico
NCT05022693PK Study of Liquid Formulation of BIO89-100 in Subjects With NASH With Compensation CirrhosisPHASE1 COMPLETED 8Aug 16, 2021Dec 21, 2021Mar 2, 20221 United States
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Study Endpoints
Primary Endpoints
Main Study: Number of Participants With Histological Resolution of Nonalcoholic Steatohepatitis (NASH) Without Worsening of Fibrosis
Week 24

Nonalcoholic fatty liver disease activity score (NAS) was the sum of the scores of steatosis, inflammation, and ballooning. NAS score ranged from 0 to 8, with higher scores indicating worse disease severity. Resolution of NASH was defined as the total absence of ballooning (score=0) and absent or mild inflammation (score=0 to 1). NASH clinical research system (CRN) fibrosis is staged on a 0-4 scale: 0 (none); 1 (perisinusoidal or periportal fibrosis); 2 (perisinusoidal and portal/periportal fibrosis); 3 (bridging fibrosis); 4 (cirrhosis). Worsening of fibrosis was defined as progression of fibrosis greater than or equal to (≥) 1 stage in NASH CRN fibrosis score.

Main Study: Number of Participants Who Achieved Improvement of Fibrosis ≥1 Stage Without Worsening of NASH
Week 24

Worsening of NASH was defined as increase in nonalcoholic fatty liver disease activity score (NAS) for ballooning, inflammation, or steatosis. NAS was the sum of the scores of steatosis, inflammation, and ballooning. NAS score ranged from 0 to 8, with higher scores indicating worse disease severity. Fibrosis improvement was defined as ≥1-stage decrease in NASH CRN fibrosis score. NASH CRN fibrosis was staged on a 0-4 scale: 0 (none); 1 (perisinusoidal or periportal fibrosis); 2 (perisinusoidal and portal/periportal fibrosis); 3 (bridging fibrosis); 4 (cirrhosis).

PK Profile of liquid formulation of BIO89-100
22 days

Determine maximum observed serum drug concentration (Cmax)

Secondary Endpoints
Main Study: Number of Participants With at Least a 2-Point Improvement in NAS and no Worsening of Fibrosis
Week 24
Main Study: Number of Participants With NASH Resolution and Fibrosis Improvement ≥1 Stage
Week 24
Main Study: Number of Participants With at Least a 2-point Improvement in NAS Score and Are Magnetic Resonance Imaging - Proton Density Fat Fraction (MRI-PDFF) Responders and Alanine Aminotransferase (ALT) Responders
Week 24
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
BIO89-100 - 15 mg once weekly (QW)EXPERIMENTAL -
BIO89-100 - 30 mg QWEXPERIMENTAL -
BIO89-100 - 44 mg once every 2 weeks (Q2W)EXPERIMENTAL -
Placebo QWPLACEBO_COMPARATOR -
Placebo Q2WPLACEBO_COMPARATOR -
Placebo QW (Main study)/ BIO89-100 - 30 mg QW (Extension)EXPERIMENTAL -
BIO89-100 30 mg, Open Lable, Single DoseEXPERIMENTAL -
Interventions
NameTypeDescription
BIO89-100DRUGSubcutaneous injection
PlaceboDRUGSubcutaneous injection
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Eligibility Criteria
Age Range21 Years — 75 Years
SexALL
Healthy VolunteersNo
Study Sites89

Key Inclusion Criteria: * Age 21 to 75 * Biopsy-confirmed NASH with fibrosis stage F2 or F3 per NASH CRN System and NAS ≥4, with a score of at least 1 in each of steatosis, ballooning degeneration, and lobular inflammation. * Qualifying biopsy must be either within 6 months of screening visit or...

Countries:United StatesPuerto Rico
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