A Trial of Dalotuzumab in Combination With Irinotecan Versus Cetuximab and Irinotecan for Participants With Metastatic Rectal Cancers (mRC) (MK-0646-025)

Phase 2TerminatedNCT01609231

Merck Sharp & Dohme LLC11 enrolled

Overview

The purpose of this adaptive trial is to compare the progression-free survival of participants with metastatic rectal carcinoma when treated with intravenous (IV) dalotuzumab (MK-0646) + irinotecan therapy relative to participants treated with IV cetuximab + irinotecan. The primary hypothesis is that administration of dalotuzumab in combination with irinotecan to participants with wild-type KRAS metastatic rectal carcinoma with high insulin growth factor (IGF)-1/low IGF-2 expression levels improves progression-free survival compared to patients treated with cetuximab in combination with irinotecan.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Rectal Neoplasms

Interventions

Dalotuzumab

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Has metastatic colorectal cancer with primary tumor originating from the rectum * Has an available archival (recent or remote) tumor, or newly obtained formalin-fixed tissue available for analysis for biomarker studies * Has at least one measurable lesion greater than or equal to 10 mm * Disease has progressed after treatment with both irinotecan- and oxaliplatin-containing regimens and should have progressed on or within 3 months of completing their last line of therapy * Has a performance status 0-1 on the Eastern Cooperative Oncology Group (ECOG) Performance Scale Exclusion Criteria: * Has poorly-controlled diabetes * Has received chemotherapy or biological therapy within 2 weeks prior to initial dosing on this study, or whose toxicities from agents administered 2 weeks earlier have not resolved to at least grade 1 or baseline, or who is within 3 weeks from a prior surgery * Has received radiotherapy within 2 weeks prior to initial dosing on this study, unless the radiotherapy was for management of pain * Is currently participating or has participated in a study with an investigational compound or device within 30 days or 5 half-lives of the investigational agent, whichever is longer, of initial dosing on this study * Was unable to complete previous course of irinotecan due to intolerable toxicity, other than discontinuation due to fatigue following prolonged administration (\>4 months exposure) * Has prior exposure to insulin-like growth factor 1 receptor (IGF-1R) inhibitors or epidermal growth factor receptor (EGFR) inhibitors * Has a known central nervous system (CNS) metastases and/or carcinomatous meningitis * Has primary CNS tumor * Has a history of a prior malignancy with the exception of cervical intraepithelial neoplasia; basal cell carcinoma of the skin; adequately treated localized prostate carcinoma; potentially curative therapy with no evidence of that disease for 5 years, deemed low risk for recurrence by treating physician. * Is human immunodeficiency virus (HIV)-positive * Has active hepatitis B or C infection and is receiving antiviral treatment regimens * Has symptomatic ascites or pleural effusion * Is concurrently using growth hormone (GH), or growth hormone inhibitors

Outcomes

Primary Outcomes

Assessment of Progression-free Survival (PFS)

PFS is a measure of the time from randomization to the time of first documented disease progression (assessed by an independent Radiology Review Committee \[iRRC\]) or participant death, whichever occurs first.

Time frame: From randomization (Cycle 1, Day 1) to the first documented disease progression or death due to any cause, whichever occurs first (up to 3 years)

Secondary Outcomes

Percentage of Participants With Objective Response Rate (ORR)

ORR is defined as the percentage of participants achieving a complete response (CR) or partial response (PR) during the course of the study using enhanced Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST 1.1). Confirmation of response was not required.

Time frame: From randomization (Cycle 1, Day 1) to the first documented disease progression or death due to any cause, whichever occurs first (up to 3 years)