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Atezolizumab Monotherapy vs Atezolizumab Plus Cobimetinib in Liver Metastases From Colorectal Cancer

ABSTRACT: This study is for patients with metastatic colorectal cancer who are candidates for resection of metastases. This study will be conducted sequentially with 2 cohorts: 1.) Monotherapy Cohort and 2.) Combination Cohort Pre-metastatectomy * Monotherapy Cohort: The first 10 subjects will receive Atezolizumab 840 mg IV on Day 1 and Day 15 of each 28-day cycle. * Combination Cohort: The next 15 subjects will receive Atezolizumab 840 mg IV on Day 1 and Day 15 and Cobimetinib 60 mg PO on Days 1-21 of each 28-day cycle. Note: Cobimetinib must be held for the 7 days prior to metastatectomy. All subjects will be treated for 2 cycles (8 weeks) prior to metastatectomy Metastatectomy Subjects will undergo liver metastatectomy within 42 days of completion of Cycle 2 of pre-metastatectomy treatment. No study treatment is administered while the patient is healing after surgery. Post-metastatectomy Once the patient has healed from the surgery, adjuvant treatment may be administered at the discretion of the treating physician. Restaging following standards of care for this setting.

DISEASE(S): Metastatic Colorectal Cancer,Colorectal Neoplasms

PROVIDER: 2258764 | ecrin-mdr-crc |

REPOSITORIES: ECRIN MDR

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Project description:Interventions: Combination treatment using cetuximab, cobimetinib and palbociclib. This is a two part open label study using escalating doses of these drugs. Phase 1 will enroll 3-6 patients in one of 6 Cohorts, for dose escalation. The initial dose escalation will start at cetuximab 150mg/m2 intravenously (IV) + cobimetinib 20 mg orally once daily (po qd) + palbociclib 50mg orally once daily (po qd), for Cohort 1. Cohort 2 = cetuximab 150mg/m2 IV + cobimetinib 20 mg po qd + palbociclib 75mg po qd. Cohort 3 = cetuximab 150mg/m2 IV + cobimetinib 40 mg po qd + palbociclib 75mg po qd. Cohort 4 = cetuximab 150mg/m2 IV + cobimetinib 60 mg po qd + palbociclib 75mg po qd. Cohort 5 = cetuximab 200mg/m2 IV + cobimetinib 60 mg po qd + palbociclib 75mg po qd. Cohort 6 = cetuximab 250mg/m2 IV + cobimetinib 60 mg po qd + palbociclib 100mg po qd. Cetuximab will be administered weekly via intravenous infusion. Cobimetinib will be taken orally once daily for the first 21 consecutive days in a 28 day treatment cycle. Cobimetinib will be taken in tablet form. Palbociclib will be taken orally once daily for first 21 consecutive days in a 28 day treatment cycle. Palbociclib will be taken in capsule form. Neither of these two drugs will be given in the last 7 days of this 28 day cycle. Cohorts of 3 patients will be enrolled at each dose level (with the option of up to six patients for each cohort if necessary) to assess toxicity. Each patient will participate in only one cohort to determine dose limiting toxicities of the combination. Patients at each dose level will be treated and observed through the end of the first cycle before treatment of subjects at the next higher dose level can begin. Cohorts 1 to 6 will randomly assign consecutive patien Primary outcome(s): Phase 1: Determination of Dose Limiting Toxicity (DLT). A DLT will be defined using the National Cancer Institute (NCI) Common Toxicity Criteria for Adverse Events (CTCAE) v 5.0 [Phase 1 DLTs will be assessed during the first cycle of treatment (28 days) and are events that are considered possiby related to the study drug combination for each cohort. After the treatment of each cohort, data will be reviewed to assess patient status and study drug related toxicities from the current cohort before deciding the escalation plan and dose level for the next cohort. ];Phase 2: Determination of Objective Response Rate as determined by MRI scanning with RECIST criteria reporting[Phase 2: patients will be reviewed for objective response rate after at least 2 treatment cycles] Study Design: Purpose: Treatment; Allocation: Non-randomised trial; Masking: Open (masking not used);Assignment: Other;Type of endpoint: Safety

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Atezolizumab Monotherapy vs Atezolizumab Plus Cobimetinib in Liver Metastases From Colorectal Cancer

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