A Study of Napabucasin (BBI-608) in Combination With FOLFIRI in Adult Patients With Previously Treated Metastatic Colorectal Cancer

Inclusion Criteria

• Written, signed consent for trial participation must be obtained from the patient appropriately in accordance with applicable ICH guidelines and local and regulatory requirements prior to the performance of any study specific procedure.
• Must have histologically confirmed advanced CRC that is metastatic.
• Must have failed treatment with one regimen containing a fluoropyrimidine, oxaliplatin with or without bevacizumab for metastatic disease. All patients must have received a minimum of 6 weeks of the first-line regimen that included bevacizumab (if applicable), oxaliplatin and a fluoropyrimidine in the same cycle. Treatment failure is defined as radiologic progression during or 50 ml/min (as calculated by the Cockcroft-Gault equation (Chronic Kidney Disease Epidemiology Collaboration [CKD-EPI]) within 14 days prior to randomization.
• Must have absolute neutrophil count ≥ 1.5 x 10^9/L within 14 days prior to randomization.
• Must have platelet count ≥ 100 x 10^9/L within 14 days prior to randomization. Must not have required transfusion of platelets within 1 week of baseline platelet assessment.
• Patient must have adequate nutritional status with Body Mass Index (BMI) > 18 kg/m^2 and body weight of > 40 kg with serum albumin > 3 g/dL.
• Other baseline laboratory evaluations, listed in Section 6.0, must be done within 14 days prior to randomization.
• Patient must consent to provision of, and Investigator(s) must confirm access to and agree to submit a representative formalin fixed paraffin block of tumor tissue in order that the specific biomarker assays may be conducted. Submission of the tissue is to occur prior to randomization, unless approved by the Sponsor. Where local center regulations prohibit submission of blocks of tumor tissue, two 2 mm cores of tumor from the block and 10-30 unstained slides of whole sections of representative tumor tissue are preferred. Where two 2 mm cores of tumor from the block are unavailable, 10-30 unstained slides of whole sections of representative tumor tissue alone are acceptable. Where no previously resected or biopsied tumor tissue exists or is available, on the approval of the Sponsor/designated CRO, the patient may still be considered eligible for the study.
• Patient must consent to provision of a sample of blood in order that the specific correlative marker assays may be conducted.
• Patients must be accessible for treatment and follow-up. Patients registered on this trial must receive protocol treatment and be followed at the participating center. This implies there must be reasonable geographical limits placed on patients being considered for this trial. Investigators must ensure that the patients randomized on this trial will be available for complete documentation of the treatment, response assessment, adverse events, and follow-up.
• Protocol treatment is to begin within 2 calendar days of patient randomization.
• The patient is not receiving therapy in a concurrent clinical study and the patient agrees not to participate in other interventional clinical studies during their participation in this trial while on study treatment. Patients participating in surveys or observational studies are eligible to participate in this study.

Exclusion Criteria

• Anti-cancer chemotherapy or biologic therapy if administered prior to the first planned dose of study medication (napabucasin or FOLFIRI) within period of time equivalent to the usual cycle length of the regimen. An exception is made for oral fluoropyrimidines (e.g. capecitabine, S-1), where a minimum of 10 days since last dose must be observed prior to the first planned dose of study medication. Standard dose of bevacizumab (5 mg/kg) may be administered prior to FOLFIRI infusion, per Investigator decision, for as long as permanent decision to include or exclude bevacizumab is made prior to patient randomization. Radiotherapy, immunotherapy (including immunotherapy administered for