This phase I trial tests the safety, side effects, and best dose of ZEN003694 in combination with the usual treatment with capecitabine in treating patients with cancer that has spread from where it first started (primary site) to other places in the body (metastatic) or cannot be removed by surgery (unresectable) and that it has progressed on previous standard treatment. ZEN003694 is an inhibitor of a family of proteins called the bromodomain and extra-terminal (BET). It may prevent the growth of tumor cells that over produce BET protein. Capecitabine is in a class of medications called antimetabolites. It is taken up by cancer cells and breaks down into fluorouracil, a substance that kills cancer cells. Giving ZEN003694 in combination with capecitabine may be safe in treating patients with metastatic or unresectable solid tumors.
Dose Escalation additional criteria: Patients must have histologically confirmed cancer that is metastatic or unresectable and must have progressed on standard therapies which would have included fluorouracil (5-FU) or capecitabine
Dose Escalation additional criteria specifically for colorectal cancer (CRC) patients: Willingness and ability to undergo a pre-treatment biopsy
Dose Expansion additional criteria: Patients must have histologically confirmed CRC that is metastatic or unresectable and must have progressed on standard therapies which would have included 5-FU or capecitabine
Dose Expansion additional criteria: Willingness and ability to undergo pre- and on- treatment biopsies
Previous treatment with BET inhibitors
History of inability to tolerate capecitabine at the projected treatment dose on this trial
Use of oral Factor Xa inhibitors (i.e., rivaroxaban, apixaban, betrixaban, edoxaban otamixaban, letaxaban, eribaxaban) and Factor IIa inhibitors (i.e., dabigatran). Low molecular weight heparin is allowed
Treatment for HIV, hepatitis B or hepatitis C only if this interferes with the current treatment (e.g. through drug-drug interactions)