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AB801

Phase 1

Advanced Cancer | Small molecule | Oncology |Arcus Biosciences, Inc.|Last Updated: Aug 13, 2026

Target and mechanism

Molecular targetAXL
Target classProtein
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment91

FDA Designations

No designations recorded

Clinical trial landscape

AB801 · 2 trials · 2 indications

Phase 1 2
NCT06120075A Study of AB801 Monotherapy and Combination Therapy in Participants With Advanced MalignanciesAdvanced Cancer
ACTIVE NOT_RECRUITING91 Analytics
NCT06004921A Study to Assess the Safety, Pharmacokinetics, and Pharmacodynamics of AB801 in Healthy VolunteersCancer
COMPLETED32 Analytics
PHASE1ACTIVE NOT_RECRUITING
A Study of AB801 Monotherapy and Combination Therapy in Participants With Advanced Malignancies
Advanced CancerUnlock trial analytics
PHASE1COMPLETED
A Study to Assess the Safety, Pharmacokinetics, and Pharmacodynamics of AB801 in Healthy Volunteers
CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants With Adverse Events
Up to 2 years
Dose Escalation Cohorts: Number of Participants With Dose-Limiting Toxicities (DLTs)
Up to 2 years
Number of Participants with Adverse Events (AEs)
Up to 30 days
Area Under the Plasma Drug Concentration-Time Curve (AUC)
Predose, Up to 120 hours postdose
Maximum Concentration (Cmax) in Plasma
Predose, Up to 120 hours postdose
Time to Maximum Concentration (Tmax) in Plasma
Predose, Up to 120 hours postdose
Half-Life Time (t1/2)
Predose, Up to 120 hours postdose

Secondary Endpoints

Area Under the Plasma Drug Concentration-Time Curve (AUC)
Predose, Up to 8 hours postdose
Maximum Concentration (Cmax) in Plasma
Predose, Up to 8 hours postdose
Time to Maximum Concentration (Tmax) in Plasma
Predose, Up to 8 hours postdose
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Dose Escalation Cohort 1 - AB801 capsule Dose Level 1EXPERIMENTALParticipants will receive AB801 orally daily
Dose Escalation Cohort 2 - AB801 capsule Dose Level 2EXPERIMENTALParticipants will receive AB801 orally daily
Dose Escalation Cohort 3 - AB801 capsule Dose Level 3EXPERIMENTALParticipants will receive AB801 orally daily
Dose Escalation Cohort 4 - AB801 capsule Dose Level 4EXPERIMENTALParticipants will receive AB801 orally daily
Dose Escalation Cohort 5 - AB801 tablets Dose Level 5EXPERIMENTALParticipants will receive AB801 orally daily
Dose Escalation Cohort 6 - AB801 tablets Dose Level 6EXPERIMENTALParticipants will receive AB801 orally daily
Dose Escalation Cohort 7 - AB801 tablets Dose Level 7EXPERIMENTALParticipants will receive AB801 orally daily
Dose Expansion Cohort - AB801 + DocetaxelEXPERIMENTALParticipants with NSCLC will receive AB801 orally in combination with docetaxel IV infusion
Cohort 1 - AB801 Dose AEXPERIMENTALParticipants will receive a single dose of AB801 or placebo
Cohort 2 - AB801 Dose BEXPERIMENTALParticipants will receive a single dose of AB801 or placebo
Cohort 3 - AB801 Dose CEXPERIMENTALParticipants will receive a single dose of AB801 or placebo
Cohort 4 - AB801 Dose DEXPERIMENTALParticipants will receive a single dose of AB801 or placebo

Interventions

NameTypeDescription
AB801DRUGAdministered as specified in the treatment arm
DocetaxelDRUGAdministered as specified in the treatment arm
PlaceboDRUGAdministered as specified in the treatment arm
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites10

Key Inclusion Criteria: * Monotherapy-specific criteria for dose escalation cohorts: * Participants may have cytologically or pathologically confirmed non-small cell lung carcinoma (NSCLC), colorectal carcinoma (CRC), breast, ovarian, renal cell carcinoma (RCC), head and neck squamous cell carci...

Countries:United StatesUnited Kingdom
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Competitive Landscape -Cancer 5 trials (matched to "Advanced Cancer")

Recent Changes (Last 90 Days)

LOWAug 14, 2026NCT06120075lastUpdatePostDate: changed
LOWAug 14, 2026NCT06120075lastUpdatePostDate: changed
LOWAug 14, 2026NCT06120075lastUpdatePostDate: changed
LOWJul 2, 2026NCT06120075lastUpdatePostDate: changed
LOWJul 2, 2026NCT06120075lastUpdatePostDate: changed
LOWJul 2, 2026NCT06120075lastUpdatePostDate: changed
LOWJul 2, 2026NCT06120075lastUpdatePostDate: changed

Frequently asked questions about AB801

What is AB801 used for in cancer?

AB801 is an investigational small molecule being studied for the treatment of cancer and advanced cancer. It is currently in Phase 1 clinical development, with trials evaluating its safety, pharmacokinetics, and pharmacodynamics in healthy volunteers and its activity as monotherapy and combination therapy in participants with advanced malignancies.

What does AB801 target?

AB801 targets AXL, a receptor tyrosine kinase protein involved in tumor progression and metastasis. By inhibiting AXL, AB801 may interfere with signaling pathways that promote cancer cell survival and spread. This mechanism is being explored in early-stage clinical trials for oncology indications.

Who is developing AB801?

AB801 is being developed by Arcus Biosciences, Inc., a biopharmaceutical company traded on the New York Stock Exchange under the ticker RCUS. The company is conducting Phase 1 clinical trials to assess the drug's safety and efficacy in cancer patients.

What phase is AB801 in?

AB801 is in Phase 1 clinical development. It is an investigational drug and has not been approved by regulatory authorities. Two Phase 1 trials are listed: one completed study in healthy volunteers and one active study in patients with advanced malignancies.

What clinical trials is AB801 in?

AB801 is being evaluated in two Phase 1 clinical trials. NCT06004921 is a completed study assessing safety, pharmacokinetics, and pharmacodynamics in healthy volunteers in the United Kingdom. NCT06120075 is an active, non-recruiting study of AB801 monotherapy and combination therapy in participants with advanced malignancies in the United States.

Is AB801 being studied in combination with other therapies?

Yes, AB801 is being studied as both monotherapy and combination therapy. The Phase 1 trial NCT06120075 is designed to evaluate AB801 alone and in combination with other agents in participants with advanced malignancies, with a target enrollment of 91 participants.