Dasatinib for the Prevention of Oxaliplatin-Induced Neuropathy in Patients With Metastatic Gastrointestinal Cancer Receiving FOLFOX Chemotherapy With or Without Bevacizumab

PRIMARY OBJECTIVES: I. To determine the recommended phase 2 dose (RP2D) of dasatinib in combination with oxaliplatin and fluorouracil (5FU) (modified version 6 regimen of leucovorin, fluorouracil and oxaliplatin \[mFOLFOX6\]) with or without bevacizumab in patients with colon, rectal or other GI cancer, defined as the lowest intermittent dose of dasatinib that affects serum biomarkers of OCT2 without influencing the pharmacokinetic properties of oxaliplatin. II. To determine the toxicity profile (based on Chemotherapy-Induced Peripheral Neuropathy \[CIPN\]20 and Common Terminology Criteria for Adverse Events \[CTCAE\] version \[v.\] 5.0) of dasatinib in combination with oxaliplatin/5-FU/bevacizumab in patients with colorectal cancer or other GI cancer. SECONDARY OBJECTIVES: I. To evaluate the influence of dasatinib on the pharmacokinetics of oxaliplatin and vice versa in these patients. OUTLINE: This is a dose-escalation study of dasatinib. Patients receive oxaliplatin intravenously (IV) over 2 hours, leucovorin IV over 2 hours, fluorouracil slow IV push over 2-4 minutes followed by continuous infusion over 46 hours on days 1 and 15. Patients also receive dasatinib orally (PO) once daily (QD) on days 14, 15, and 28 of cycle 1 and day 1 of cycle 2. Patients may receive bevacizumab IV over 30 minutes on days 1 and 15. Treatment repeats every 28 days for up to cycle 3 day 1 in the absence of disease progression or unacceptable toxicity.