Arcus Biosciences to Present Preliminary Data from the Ongoing Phase 1 Dose-Escalation Trials of AB928 in Combination with Chemotherapy or AB122 at the 2019 ASCO Annual Meeting

May 29, 2019 20:30 UTC

HAYWARD, Calif.--(BUSINESS WIRE)-- Arcus Biosciences, Inc. (NYSE:RCUS), a clinical-stage biopharmaceutical company focused on creating innovative cancer immunotherapies, today announced the Company will be presenting preliminary data from the ongoing Phase 1 dose-escalation trials of AB928, a potential best-in-class dual A2a/A2b receptor antagonist, in a poster session at the 2019 American Society of Clinical Oncology (ASCO) Annual Meeting taking place in Chicago, IL, from May 31-June 4, 2019.

Poster presentation details

Abstract Title: AB928, a Novel Dual Adenosine Antagonist, Combined With Chemotherapy or AB122 (anti-PD-1) in Patients With Advanced Tumors: Preliminary Results From Ongoing Phase 1 Studies
Abstract Number: 2604
Session Information: Developmental Immunotherapy and Tumor Immunobiology
Date and Time: Saturday, June 1, 8:00 a.m. - 11:00 a.m. Central Time
Location: Hall A

A copy of the poster will be available on the “Publications” section of the Arcus website at

Conference call details

Arcus will host a conference call and live webcast on Tuesday, June 25, 2019, at 1:30 p.m. Pacific Time/4:30 p.m. Eastern Time to provide a mid-year update on its clinical and preclinical programs. Investors interested in listening to the conference call may do so by dialing (866) 211-3164 in the U.S. or (647) 689-6573 internationally, using Conference ID: 7163128. In addition, the live webcast and accompanying slides will be available on the “Investors” section of the Arcus website at Following the live webcast, a replay will be available on the Company’s website for approximately 30 days.

About AB928

AB928 is an orally bioavailable, highly potent antagonist of the adenosine 2a and 2b receptors. The activation of these receptors by adenosine interferes with the activity of key populations of immune cells and inhibits an optimal anti-tumor immune response. By blocking these receptors, AB928 has the potential to reverse adenosine-induced immune suppression within the tumor microenvironment. AB928 was designed specifically for the oncology setting, with a profile that includes potent activity in the presence of high concentrations of adenosine and a minimal shift in potency due to non-specific protein binding, both essential properties for efficacy in the tumor microenvironment. AB928 has other attractive features, including high penetration of tumor tissue and low penetration through the healthy blood-brain barrier. In a Phase 1 trial in healthy volunteers, AB928 has been shown to be safe and well tolerated and to have pharmacokinetic and pharmacodynamic profiles consistent with a once-daily dosing regimen.

About AB122

AB122 is a fully human IgG4 antibody that potently and selectively blocks PD-1. The biochemical, biological and preclinical properties of AB122 have been shown to be similar to those of the marketed anti-PD-1 antibodies nivolumab and pembrolizumab. AB122 is being evaluated in ongoing Phase 1/1b dose-escalation and dose-expansion trials evaluating AB122 in combination with AB928, a potential best-in-class dual A2a/A2b receptor antagonist, and in combination with AB154, a potential best-in-class anti-TIGIT antibody. In May 2019, Arcus announced a clinical development collaboration with Strata Oncology utilizing Strata’s precision drug development platform and proprietary biomarkers to evaluate AB122 in a basket trial including tumor types that generally have low levels of response to anti-PD-1 therapy. AB122 is also being evaluated in an ongoing Phase 1 dose-escalation trial assessing monotherapy dosing schedules. The Company expects AB122 to form the backbone of many of its intra-portfolio combinations.

About Arcus Biosciences

Arcus Biosciences is a clinical-stage biopharmaceutical company focused on creating innovative cancer immunotherapies. Arcus has several programs targeting important immuno-oncology pathways, including a dual adenosine receptor antagonist, AB928, which is in a Phase 1/1b program to evaluate AB928 in combination with other agents in multiple tumor types, and an anti-PD-1 antibody, AB122, which is being evaluated in a Phase 1 trial and is being tested in combination with Arcus’s other product candidates. Arcus’s other programs include AB154, an anti-TIGIT antibody, which is being evaluated in a Phase 1 trial as monotherapy and in combination with AB122, and AB680, a small-molecule inhibitor of CD73, which is in a Phase 1 healthy volunteer study. Arcus has extensive in-house expertise in medicinal chemistry, immunology, biochemistry, pharmacology and structural biology. Utilizing these unique capabilities, Arcus has developed a robust and active early stage discovery effort focused on small-molecule pipeline expansion. For more information about Arcus Biosciences, please visit

Source: Arcus Biosciences



Katherine Bock
(510) 694-6231

Nicole Arndt
(510) 284-4728


Source: Arcus Biosciences, Inc.

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