A Safety and Efficacy Study of Domvanalimab + Zimberelimab Combination Therapy in Participants With Advanced Upper Gastrointestinal Tract Malignancies


About this study

The purpose of this study is to evaluate the safety and effectiveness of the anti-T cell immunoglobulin and ITIM domain (TIGIT) monoclonal antibody domvanalimab, the anti-programmed cell death protein 1 (PD-1) monoclonal antibody zimberelimab, and multiagent chemotherapy in the first-line setting, and of domvanalimab and zimberelimab in the second-line or greater setting in participants with locally advanced unresectable or metastatic esophageal, gastroesophageal junction (GEJ), and gastric adenocarcinoma.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

Inclusion Criteria:

- Participants with histologically confirmed diagnosis of locally advanced unresectable
or metastatic esophageal, GEJ, or gastric adenocarcinoma with life expectancy ≥ 3
months as assessed by the Investigator

- Eastern cooperative oncology group (ECOG) Performance Score of 0-1

- At least one measurable target lesion per RECIST v1.1.

- Adequate organ and marrow function

- Able to provide an archival tumor sample that is representative of the cancer under
investigation and suitable for central PD-L1 testing

Exclusion Criteria:

- Participants with underlying medical conditions that, in the Investigator's or
Sponsor's opinion, will make the administration of investigational products hazardous

- Only for Cohort A: Known Human Epidermal Growth Factor Receptor 2 (HER-2) positive

- Known symptomatic, actively progressing, or untreated CNS (brain or leptomeningeal)

- Discontinued use of prior immune checkpoint therapy due to immune related adverse
events; received prior treatment with an anti-TIGIT monoclonal antibody.

- History of trauma or major surgery within 28 days prior to enrollment.

- Use of any live vaccines against infectious diseases within 28 days prior to

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status Contact

Jacksonville, Fla.

Mayo Clinic principal investigator

Jason Starr, D.O.

Contact us for the latest status

Contact information:

Cancer Center Clinical Trials Referral Office

(855) 776-0015

Scottsdale/Phoenix, Ariz.

Mayo Clinic principal investigator

Mohamad Sonbol, M.D.

Open for enrollment

Contact information:

Cancer Center Clinical Trials Referral Office

(855) 776-0015

More information


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