Study of Gemcitabine, Cisplatin, Quemliclustat (AB680) and Zimberelimab (AB122) During First-line Treatment of Advanced Biliary Tract Cancers (QUIC)
This is a phase 2 study of gemcitabine, cisplatin, zimberelimab (AB122) and quemliclustat (AB680) in subjects with untreated advanced biliary tract cancers (BTC). The study will include a safety run-in involving 6 study participants. The goal of the safety run-in is to screen for early safety signals of the proposed drug combination. Trial enrollment can continue while full safety assessment is being completed for the first 6 subjects. Participants will receive 4 cycles of combination therapy as described. After 4 cycles (\ 6 months), cisplatin will be discontinued, while gemcitabine, zimberelimab (AB122), and quemliclustat (AB680) will be continued. Subjects will be treated until disease progression or development of intolerable toxicities. In total, there will be up to 39 participants on the study.
• Patients with cytologically or histologically confirmed BTC by AJCC version 8.
• Patients must have late stage (locally advanced, recurrent or metastatic) BTC. Patients must not have received systemic treatment for advanced disease. Prior adjuvant therapy is allowed as long as recurrences occurred 6 months or later from all treatment completion.
• Written informed consent and HIPAA authorization for release of personal health information. NOTE: HIPAA authorization may be included in the informed consent or obtained separately.
• Age ≥ 18 years at the time of consent.
• ECOG Performance Status of 0-2 within 28 days prior to registration.
• Presence of measurable or evaluable disease, as defined by RECIST v1.1.
• Adequate organ function as detailed in the protocol.
• Females of childbearing potential who are sexually active with a male able to father a child must have a negative pregnancy test (serum or urine) within 14 days prior to registration. NOTE: Biliary cancer may secrete hormones to produce a false-positive pregnancy test. Female subjects of childbearing potential with a positive pregnancy test should have a thorough history and additional work up as determined by the treating physician to rule out pregnancy (e.g. serial βHCG measurements, ultrasound). Once pregnancy has been ruled out, the subject may proceed with screening and enrollment.
• Females of childbearing potential who are sexually active with a male able to father a child must be willing to abstain from heterosexual vaginal intercourse or use an effective method(s) of contraception from the time of informed consent, during the study and for up to 14 months after the last dose of study drug(s). Males able to father a child must be willing to abstain from heterosexual vaginal intercourse or to use an effective method(s) of contraception from initiation of treatment, during the study and for up to 11 months after the last dose of study drug(s). See the protocol for specific timeframes for each drug.
⁃ Ability of the subject to understand and comply with study procedures for the entire length of the study, as determined by the enrolling physician or protocol designee.