Symptoms and General Pathology

All Conditions

Neoplasms

Digestive System Diseases

Microsatellite Instability

Colorectal Neoplasms

Intestinal Neoplasms

Gastrointestinal Neoplasms

Digestive System Neoplasms

Gastrointestinal Diseases

Colonic Diseases

Intestinal Diseases

Rectal Diseases

Genomic Instability

Antineoplastic Agents

All Drugs and Chemicals

Pembrolizumab

Antineoplastic Agents, Immunological

Immune Checkpoint Inhibitors

MK-3475

Dung Le, MD

This study will be looking at whether MK-3475 (an antibody that blocks negative signals to T cells) is effective (anti-tumor activity) and safe in three different patient populations. These include: 1. patients with MSI positive colon cancer, 2. patients with MSI negative colon cancer and 3. patients with other MSI positive cancers.

Study of MK-3475 in Patients With Microsatellite Unstable (MSI) Tumors (Cohorts A, B and C)

Phase 2 Study of MK-3475 in Patients With Microsatellite Unstable (MSI) Tumors

For Cohorts A and B: irPFS rate is defined as the percentage of patients with disease progression (irPD or relapse from irCR as assessed using irRC criteria) or death due to any cause at 20 weeks. Per irRC criteria, Complete Response (irCR) is the disappearance of all target lesions, Partial Response (irPR) is a decrease in tumor burden by 50% or greater by a consecutive assessment at least 4 weeks after first documentation, Stable Disease (irSD) is the failure to meet criteria for irCR or irPR (in absence of irPD), Progressive Disease (irPD) is at least 25% increase in tumor burden relative to nadir. Estimation based on the Kaplan-Meier curve.

For Cohorts A and B: Immune-related Objective Response Rate (irORR) is defined as the percentage of patients achieving a complete response (irCR) or partial response (irPR) based on irRC criteria. Per irRC criteria, Complete Response (irCR) is the disappearance of all target lesions, Partial Response (irPR) is a decrease in tumor burden by 50% or greater by a consecutive assessment at least 4 weeks after first documentation.

For Cohort C: irPFS rate is defined as the percentage of patients with disease progression (irPD or relapse from irCR as assessed using irRC criteria) or death due to any cause at 20 weeks. Per irRC criteria, Complete Response (irCR) is the disappearance of all target lesions, Partial Response (irPR) is a decrease in tumor burden by 50% or greater by a consecutive assessment at least 4 weeks after first documentation, Stable Disease (irSD) is the failure to meet criteria for irCR or irPR (in absence of irPD), Progressive Disease (irPD) is at least 25% increase in tumor burden relative to nadir. Estimation based on the Kaplan-Meier curve.

For Cohorts A and C: Objective Response Rate (ORR) is defined as the percentage of patients achieving a complete response (CR) or partial response (PR) based on RECIST 1.1 criteria. CR = disappearance of all target lesions, PR is =\>30% decrease in sum of diameters of target lesions.

For Cohorts A and C: PFS is defined as the percentage of patients with disease progression (PD or relapse from CR as assessed using RECIST 1.1 criteria) or death due to any cause at 20 weeks. Per RECIST 1.1 criteria, CR = disappearance of all target lesions, Partial Response (PR) is =\>30% decrease in sum of diameters of target lesions, Progressive Disease (PD) is \>20% increase in sum of diameters of target lesions, Stable Disease (SD) is \<30% decrease or \<20% increase in sum of diameters of target lesions. Estimation based on the Kaplan-Meier curve.

OS will be measured from date of first dose until death or end of follow-up (OS will be censored on the date the subject was last known to be alive for subjects without documentation of death at the time of analysis). Estimation based on the Kaplan-Meier curve.

irPFS rate is defined as the percentage of patients with disease progression (irPD or relapse from irCR as assessed using irRC criteria) or death due to any cause at 28 weeks. Per irRC criteria, Complete Response (irCR) is the disappearance of all target lesions, Partial Response (irPR) is a decrease in tumor burden by 50% or greater by a consecutive assessment at least 4 weeks after first documentation, Stable Disease (irSD) is the failure to meet criteria for irCR or irPR (in absence of irPD), Progressive Disease (irPD) is at least 25% increase in tumor burden relative to nadir. Estimation based on the Kaplan-Meier curve.

ORR is defined as the percentage of patients achieving a complete response (CR) or partial response (PR) based on RECIST 1.1 criteria. CR = disappearance of all target lesions, PR is =\>30% decrease in sum of diameters of target lesions.

When calculating the incidence of AEs, each adverse event (AE) (as defined by NCI CTCAE v4.03) will be counted only once for a given subject.

PFS is defined as the percentage of patients with disease progression (PD or relapse from CR as assessed using RECIST 1.1 criteria) or death due to any cause at 28 weeks. Per RECIST 1.1 criteria, CR = disappearance of all target lesions, Partial Response (PR) is =\>30% decrease in sum of diameters of target lesions, Progressive Disease (PD) is \>20% increase in sum of diameters of target lesions, Stable Disease (SD) is \<30% decrease or \<20% increase in sum of diameters of target lesions. Estimation based on the Kaplan-Meier curve.

Disease Control Rate (DCR) is defined as the percentage of patients achieving a complete response (CR) or partial response (PR) or stable disease (SD) based on RECIST 1.1 criteria. CR = disappearance of all target lesions, PR is =\>30% decrease in sum of diameters of target lesions, progressive disease (PD) is \>20% increase in sum of diameters of target lesions, stable disease (SD) is \<30% decrease or \<20% increase in sum of diameters of target lesions.

ORR was used to determine whether MSI is a marker that predicts treatment response. This is the same data presented in outcome measure number 8 (ORR, to test against null of 5%).

Merck Sharp & Dohme LLC

Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins

Cohort A: MSI Positive Colorectal Cancer

Cohort B: MSI Negative Colorectal Cancer

Cohort C: MSI Positive Non-Colorectal Cancer

Total

Age, Categorical

Sex: Female, Male

Ethnicity (NIH/OMB)

Race (NIH/OMB)

It was a pre-specified objective to complete this objective in Cohort A and B only. Per protocol during stages 1 and 2, the study enrollment goal was 25 for Cohort A and B. However, only 24 subjects were enrolled in Cohort A. Additional subjects for this study were enrolled during the second expansion portion of this protocol.

Immune-related Progression Free Survival (irPFS) at 20 Weeks in MSI Positive and Negative Colorectal Adenocarcinoma Participants Using Immune Related Response Criteria (irRC) During Stages 1 and 2

Immune-related Objective Response Rate in MSI Positive and Negative Colorectal Adenocarcinoma Participants Using Immune Related Response Criteria (irRC) During Stages 1 and 2

It was a pre-specified objective to complete this objective in Cohort C only. Per protocol during stages 1 and 2, the study enrollment goal was 21 for Cohort C. Additional subjects for this study were enrolled during the second expansion portion of this protocol.

Immune-related Progression Free Survival (irPFS) at 20 Weeks in MSI Positive Non-colorectal Adenocarcinoma Participants Using Immune Related Response Criteria (irRC) During Stages 1 and 2

It was a pre-specified objective to complete this objective in Cohort A and C only.

Objective Response Rate in MSI Positive Solid Tumor Malignancies Using Response Evaluation Criteria in Solid Tumors (RECIST 1.1)

Progression Free Survival (PFS) at 20 Weeks in MSI Positive Solid Tumor Malignancies Using Response Evaluation Criteria in Solid Tumors (RECIST 1.1)

Overall Survival (OS)

Immune-related Progression Free Survival (irPFS) at 28 Weeks in MSI Positive and Negative Solid Tumor Malignancies Using Immune Related Response Criteria (irRC)

Objective Response Rate (ORR) in MSI Positive and Negative Solid Tumor Malignancies Using Response Evaluation Criteria in Solid Tumors (RECIST 1.1)

Number of Patients Experiencing a Grade 3 or Above Treatment-related Toxicity

Progression Free Survival (PFS) at 28 Weeks in MSI Positive and Negative Solid Tumor Malignancies Using Response Evaluation Criteria in Solid Tumors (RECIST 1.1)

Spots Global Cancer Trial Database for msi positive colorectal cancer