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BIO89-100

Phase 2

NASH - Nonalcoholic Steatohepatitis | Small molecule | Metabolic |89bio, Inc.|Last Updated: Jan 6, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials2
Total Enrollment230

FDA Designations

No designations recorded

Clinical trial landscape

BIO89-100 · 2 trials · 1 indication

Phase 2 1Phase 1 1
NCT04929483Study Evaluating the Safety, Efficacy and Tolerability of BIO89-100 in Subjects With Biopsy-confirmed Nonalcoholic Steatohepatitis (NASH)NASH - Nonalcoholic Steatohepatitis
COMPLETED222 Analytics
PHASE2COMPLETED
Study Evaluating the Safety, Efficacy and Tolerability of BIO89-100 in Subjects With Biopsy-confirmed Nonalcoholic Steatohepatitis (NASH)
NASH - Nonalcoholic SteatohepatitisUnlock trial analytics

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 to 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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Frequently asked questions about BIO89-100

What is BIO89-100 used for?

BIO89-100 is an investigational drug being developed for the treatment of Nonalcoholic Steatohepatitis (NASH), a condition characterized by liver inflammation and damage. It is currently in clinical development and has not been approved by regulatory authorities.

Who makes BIO89-100?

BIO89-100 is being developed by 89bio, Inc., a biopharmaceutical company. The company's stock is traded under the ticker symbol ETNB. 89bio is focused on developing therapies for metabolic and liver diseases.

What phase is BIO89-100 in?

BIO89-100 is in Phase 2 clinical development. It has completed a Phase 2 trial and a Phase 1 trial. The drug is investigational and has not been approved for commercial use.

What clinical trials is BIO89-100 in?

BIO89-100 has completed two clinical trials. The Phase 2 trial (NCT04929483) enrolled 222 participants with biopsy-confirmed NASH, while the Phase 1 trial (NCT05022693) enrolled 8 participants with NASH and compensated cirrhosis. Both trials were completed in the United States and Puerto Rico.

Is BIO89-100 the same as any other drug?

BIO89-100 is the primary name for this investigational drug. No alternative names have been reported for this asset. It is being studied specifically for NASH and is not known to be marketed under any other brand name.