A Phase I-II Study to Test the Safety and Efficacy of PD1 (AB122) and Adenosine Receptor (AB928) Antagonists With Chemotherapy After Short-Course Radiation for Rectal Cancer.

Recruiting now · Phase 2

Conditions studied: Rectal Cancer

In brief

Enrolled patients will receive upfront (week 1) short-course radiotherapy to gross pelvic disease (25Gy in 5fx) in combination with AB928 (150 mg orally, once daily as part of a continuous dose regimen). This will be followed by consolidation chemotherapy (weeks 3-20) with mFOLFOX x9 cycles in combination with AB928 and AB122.

Key facts

Study ID

NCT05024097

Run by

Weill Medical College of Cornell University

People needed

43

Starts

2022-03-31

Expected to finish

2031-12-01

Last updated by the study team

2026-07-29

Who can join

Age: 18 and older, up to 90. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Histologically confirmed diagnosis of adenocarcinoma of the rectum
• Age ≥ 18 years
• ECOG performance status 0-1
• cT3N0 or cT1-3N1 or cT4 or cN2
• 5cm from the anal verge
• Rectal cancer amenable to total mesorectal excision
• No evidence of distant metastases
• No prior pelvic radiation therapy
• No prior chemotherapy or surgery for rectal cancer
• No infections requiring systemic antibiotic treatment
• Hgb >8.0 gm/dL, PLT > 150,000/mm3, total bilirubin ≤ 1.5x upper limit of normal, AST ≤ upper limit of normal, ALT ≤ 3x upper limit of normal
• Patients must read, agree to, and sign a statement of informed consent prior to participation in this study. Patients who do not read or understand English or eligible but must have the consent form bread to them in its entirety by an official translator. Informed consent for non-literate or non-English speaking patients may not be obtained by using a relative or a member of the patient's clinical team as a translator
• Female participants or reproductive potential, defined as not surgically sterilized and between menarche and 1 year post menopause, must have a negative serum pregnancy test within 4 weeks prior to initiation of study treatment
• Female participants of reproductive potential and male participants with female partners of reproductive potential must remain abstinent (refrain from heterosexual intercourse) or use highly effective contraceptive measures from the start of study treatment until 30 days after the last dose of Etrumadenant, -120 days after the last dose of Zimberelimab, whichever is longer and duration of contraception to follow oxaliplatin should be at least 9 months after the last dose for women and 6 months after the last dose for men)
• Women with childbearing potential who are negative for pregnancy (urine or blood) and who agree to use effective contraceptive methods. A woman of childbearing potential is defined by one who is biologically capable of becoming pregnant. Reliable contraception should be used from trial screening and must be continued throughout the study.
• Male subjects must also agree to use effective contraception.

You may not qualify if…

• Recurrent rectal cancer
• Primary unresectable rectal cancer is defined as a primary rectal tumor which, on the basis of either physical exam or pelvic MRI, is demed to be adherent or fixed to adjacent pelvic structures (en bloc resection wll not be achieved with negative margins).
• Involved radial margin
• Serum creatinine level >1.5x the upper limit of normal
• Patients who have received prior pelvic radiotherapy
• QTc ≥480 msec using Fredericia's QT correction formula
• Due to the potential risk for drug-drug interactions with etrumadenant, participants must not have had:
• Treatment with known BCRP substrates with a narrow therapeutic window, administered orally (e.g., prazosin, rosuvastatin) within 4 weeks or 5 half-lives of the drug (whichever is shorter) prior to initiation of and throughout study treatment
• Treatment with known P-gp substrates with a narrow therapeutic window, administered orally (e.g., digoxin) within 4 weeks or 5 half-lives of the drug (whichever is shorter) prior to initiation of study treatment
• Treatment with known strong CYP3A4 inducers (e.g., rifampin, phenytoin, carbamazepine, phenobarbital, and St. John's Wort) and strong CYP3A4 inhibitors (e.g., clarithromycin, grapefruit juice, itraconazole, ketoconazole, posaconazole, telithromycin, and voriconazole) within 4 weeks (for investigational drugs when half- life is unknown or not accurately determined) or 5 drug-elimination half-lives of the drug (when half-life is determined), whichever is longer, or if it is a marketed drug, then 5 drug-elimination half-lives of the drug, prior to initiation of study treatment
• Refer to the following for more examples of relevant substrates, inhibitors, and inducers with the potential for drug-drug interactions with Etrumadenant: https://www.fda.gov/drugs/drug-interactions-labeling/drug-development-and-drug- interactions-table-substrates-inhibitors-and- Inducers
• Patients receiving herbal and natural remedies. Concomitant use of therapies that contain cannabinoids may be permitted based on the Investigator's discretion.
• Sensitive substrates of BSEP, MATE1and OCT2.
• Any gastrointestinal condition that would preclude the use of oral medications (e.g., difficulty swallowing, nausea, vomiting, or malabsorption)
• Prior treatment with an agent targeting the adenosine pathway
• Patients with prior allogenic stem cell or solid organ transplantation
• Any active autoimmune disease or a documented history of autoimmune disease or syndrome that required systemic treatment in the past 2 years (i.e., with use of disease-modifying agents, corticosteroids, or immunosuppressive drugs), except for vitiligo or resolved childhood asthma/atopy
• Patients with history of idiopathic pulmonary fibrosis, pneumonitis, or interstitial lung disease
• Patients receiving treatment with systemic immunosuppressive medication (including, but not limited to, corticosteroids, cyclophosphamide, azathioprine, methotrexate, thalidomide, and antitumor necrosis factor-α agents) administered at >10 mg/day prednisone or equivalent within 2 weeks prior to initiation of study treatment
• Patients who received a live vaccine within 30 days
• Patients who are known to have dihydropyrimidine dehydrogenase (DPD) deficiency
• Patients with peripheral neuropathy Grade ≥ 2
• History of severe allergic reactions to chimeric or humanized antibodies or fusion proteins
• Patients with a history of any arterial thrombitic event within the past 6 months,
• Patients with any other concurrent medical or psychiatric condition or disease which, in the investigator's judgment would make them inappropriate candidates for entry into this study

Where it is running

• Weill Cornell Medical College — New York, New York, United States (enrolling)
• Brooklyn Methodist Hospital - NewYork Presbyterian — New York, New York, United States (enrolling)
• New York Presbyterian Hospital - Queens — New York, New York, United States (enrolling)

Full record on ClinicalTrials.gov

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