A Study of MLN0264 in Patients With Pancreatic Cancer

Participants with at least one post-baseline potentially clinically significant serum chemistry, hematology, coagulation or urinalysis result. Clinically significant results are those that were assessed by the investigator to be Grade 3 or higher using the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE). Grade 3=severe, Grade 4=life threatening or disabling and Grade 5=Death.

Participants with at least one potentially clinically significant post-baseline vital sign finding including measurements of diastolic and systolic blood pressure, heart rate, and oral temperature.

PFS is defined as the time in days from the date of first study drug administration to the date of first documentation of disease progression or death. Progression is defined using Response Evaluation Criteria In Solid Tumors Criteria (RECIST v1.1), as a 20% increase in the sum of the longest diameter of target lesions, or a measurable increase in a non-target lesion, or the appearance of new lesions.

Duration of response is defined as the time from the date of first documentation of a Partial Response or better to the date of first documentation of disease progression or relapse based on investigator assessment using RECIST version 1.1 guidelines. Per RECIST version 1.1 for target lesions and assessed by MRI: CR, Disappearance of all target lesions; PR, >=30% decrease in the sum of the longest diameter of target lesions.

Disease control rate is defined as the percentage of participants with complete response (CR) or partial response (PR) or stable disease (SD) with a minimum of 12 weeks' duration. Investigator response is based on the Response Evaluation Criteria in Solid Tumors (RECIST) Version 1.1. CR: Disappearance of all target lesions, non-target lesions, no new lesions, and normalization of tumor marker level. PR: At least a 30% decrease in the sum of diameters of target lesions, no progression in non-target lesion, and no new lesions. SD: Neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (PD), taking as reference the smallest sum longest diameter (LD) since the treatment started.

Overall survival is defined as the time in days from the date of first study drug administration to the date of death.

Blood samples were collected and sent to a laboratory to be tested for MMAE.

GCC H-score is based on the sum of the 0 to 300 H-score for cytoplasmic staining and the 0 to 300 H-score for apical staining for a total possible H-score 0 to 600. Separate consent is required to obtain archival tumor specimens for GCC expression assessment prior to screening.

An AE is defined as any untoward medical occurrence in a participant administered a pharmaceutical product; the untoward medical occurrence does not necessarily have a causal relationship with this treatment. An SAE is defined as any untoward medical occurrence that at any dose results in death, is life-threatening, requires inpatient hospitalization or prolongation of an existing hospitalization, results in persistent or significant disability or incapacity, is a congenital anomaly/birth defect or is a medically important event.

Blood samples were collected and sent to a laboratory to be tested for serum concentrations of MLN0264.

Blood samples were collected and sent to a laboratory to be tested for conjugated and unconjugated antibodies.

The percentage of participants with the best percentage of tumor reduction from baseline in the sum of the diameter was calculated

Blood samples were collected to assess the immunogenicity of MLN0264 (ATA development) using a laboratory test. Neutralizing ATA assessment was performed for ATA-positive samples only.