A Study of ARRY-382 in Combination With Pembrolizumab for the Treatment of Patients With Advanced Solid Tumors

ORR was defined as the percentage of participants who achieved a BOR of CR or PR as determined by investigator review of radiographic disease assessments per RECIST v1.1. As per RECIST v1.1: CR = disappearance of target and non-target lesions and normalization of tumor markers. Pathological lymph nodes must have short axis measures <10 mm. PR = at least a 30% decrease in the sum of measures (longest diameter for tumor lesions and short axis measure for nodes) of target lesions, taking as reference the baseline sum of diameters. Non-target lesions must be non-PD. The analysis was based on confirmed responses for which CR or PR must be confirmed by repeat disease assessment studies performed no less than 4 weeks after the criteria for response were first met to qualify as CR or PR, respectively.

DOR was defined as the time from the date of the first documented response (CR or PR) to the earliest date of disease progression, or death due to any cause after achieving a response. As per RECIST v1.1: CR = disappearance of target and non-target lesions and normalization of tumor markers. Pathological lymph nodes must have short axis measures < 10 mm. PR = at least a 30% decrease in the sum of measures (longest diameter for tumor lesions and short axis measure for nodes) of target lesions, taking as reference the baseline sum of diameters. PD = at least a 20% increase in the sum of diameters of measured lesions taking as references the smallest sum of diameters recorded on study (including baseline) and an absolute increase of >= 5 mm or appearance of at least 1 new lesion. Unequivocal progression of existing non-target lesions. DOR was estimated using the Kaplan-Meier method.

PFS was defined as the time from the date of first dose of study drug to the earliest date of disease progression per RECIST v1.1, or death due to any cause, whichever occurs first. If a participant did not have a PFS event at the time of the analysis cut-off or at the start of any new anticancer therapy, PFS was censored at the date of last adequate tumor assessment. PD = at least a 20% increase in the sum of diameters of measured lesions taking as references the smallest sum of diameters recorded on study (including baseline) and an absolute increase of >= 5 mm or appearance of at least 1 new lesion. Unequivocal progression of existing non-target lesions.

OS was defined as the time from the start of treatment to the date of death due to any cause. If a death was not observed by the date of the analysis cut-off, OS was censored at the date of last contact. OS was estimated using the Kaplan-Meier method.

irRR was defined as the percentage of participants who achieved immune-related best overall response (irBOR) of immune-related CR (irCR) or immune-related PR (irPR), as determined by the investigator per immune related response criteria (irRC). irBOR was the best response using irRC recorded from the start of study treatment until the end of treatment. irCR was the disappearance of all target lesions, irPR was a decrease in tumor burden by 50% or greater by a consecutive assessment at least 4 weeks after first documentation.

irPFS was defined as the time from the start of treatment to the time of first documented progression per irRC, or death due to any cause. irRC criteria for progression for 1) Measurable new lesions: incorporated into the tumor burden (eg, added to the index lesions); do not define progression unless the total measurable tumor burden increases by the required amount (25%); 2) New non-measurable lesions: not considered progression if the total measurable tumor burden is stable or shrinking. For the analysis of irPFS, Kaplan-Meier method was used.

Tumor markers were measured for tumor type from serum samples obtained from participants in Phase 2. Mean change from baseline was reported in this outcome measure.

An AE was any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. An SAE was an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly. TEAEs were events between first dose of study drug and up to 30 days after last dose that were absent before treatment or that worsened relative to pretreatment state.

Abnormalities: Albumin (hypoalbuminemia),Alkaline phosphatase (ALP increased), Alanine aminotransferase (ALT increased), Aspartate aminotransferase (AST increased),Total bilirubin (TBL increased), Creatinine (increased), Corrected calcium (hypocalcemia/hypercalcemia), Creatine kinase (CK increased), Glucose (hypoglycemia/hyperglycemia), Amylase (increased), Lipase (increased) ,Phosphate (hypophosphatemia), Magnesium (hypomagnesemia/hypermagnesemia), Potassium (hypokalemia/hyperkalemia), Sodium (hyponatremia/hypernatremia). Participants with all grades and grade 3/4 abnormalities were reported. Test abnormalities were graded by CTCAE v4.03 as Grade 1=mild; Grade 2=moderate; Grade 3/Grade 4=severe/life-threatening.

Hematology abnormalities: Hemoglobin (anemia/hemoglobin increased), Platelets (count decreased), Leukocytes (count decreased/increased), Neutrophils (count decreased), Lymphocytes (count increased/decreased). Coagulation abnormalities: International Normalized Ratio (INR increased), Partial thromboplastin time(PTT)/Activated partial thromboplastin Time (aPTT, time prolonged). Abnormalities were graded by CTCAE grade 4.03 as Grade 1= mild; Grade 2 = moderate; Grade 3/Grade 4 = severe/life-threatening. Participants with all grades and grade 3/4 abnormalities were reported.

Liver function parameters/abnormalities: Aspartate aminotransferase (AST) and Alanine aminotransferase (ALT): >3* upper limit of normal (ULN), >5*ULN, >8*ULN, >10*ULN, >20*ULN; Bilirubin >1.5*ULN, >2*ULN; Alkaline phosphatase (ALP) >2*ULN, >3*ULN.

Thyroid panel laboratory parameters/abnormalities: thyrotropin, free triiodothyronine (T3), free thyroxine (T4). Shift in thyroid panel severity from baseline grade low, normal, high and missing to the post baseline grades as low, normal, high and missing is reported in this outcome measure.

Urinalysis laboratory parameters/abnormalities: Decimal logarithm of reciprocal of hydrogen ion activity (pH), specific gravity, protein, glucose, ketones, nitrite, blood, leukocyte esterase, microscopy (if urine tested positive for blood or protein). Clinical significance was judged by investigator.

Vital signs included systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate, body temperature and weight. Low SBP: less than or equal to (<=)90 millimeter of mercury (mmHg) with decrease from baseline of >=20 mmHg. High SBP: >=160 mmHg with increase from baseline of >=20 mmHg. Low DBP: <=50 mmHg with decrease from baseline of >=15 mmHg. High DBP: >=100 mmHg with increase from baseline of >=15 mmHg. Low heart rate: <=50 beats/min with decrease from baseline of >=15 beats/min. High heart rate: >=120 beats/min with increase from baseline of >=15 beats/min. Low temperature: <=36 degree Celsius (C). High temperature: >=37.5 degree C. Low Weight: decrease from baseline >=20%. High weight: increase from baseline >=10%.

The lower limit of quantitation (LLOQ) for analyte ARRY-382 was 5.00 nanogram per milliliter (ng/mL).

Drug ARRY-382 had its three metabolites AR00469099, AR00469100 and AR00470870. Plasma concentration of metabolite AR00469099 was reported in this outcome measure. The LLOQ for analyte AR00469099 was 1.00 ng/mL.

Drug ARRY-382 had its three metabolites AR00469099, AR00469100 and AR00470870. Plasma concentration of metabolite AR00469100 was reported in this outcome measure. The LLOQ for analyte AR00469100 was 1.00 ng/mL.

Drug ARRY-382 had its three metabolites AR00469099, AR00469100 and AR00470870. Plasma concentration of metabolite AR00470870 was reported in this outcome measure. The LLOQ for analyte AR00470870 was 1.00 ng/mL.

AUCtau was defined as area under the plasma concentration-time curve over the dosing interval, where dosing interval was 24 hours.

Cmax was obtained from plasma concentration time curve. Cmax at single dose was reported at Cycle1 Day 1 and Cmax at steady state was reported at Cycle 2 Day 1.

Measured concentration at the pre-dose at steady-state.

Tmax was obtained from plasma concentration time curve. Tmax at single dose was reported at Cycle 1 Day 1 and Tmax at steady state was reported at Cycle 2 Day 1.

Different MR reported for single dose calculated at Cycle 1 Day 1 were as follows: 1) MRAUClast = ratio of AUClast values of the metabolite compared to parent, corrected for molecular weight, where AUClast was area under the plasma concentration-time curve from zero to the last measurable time point; 2) MRCmax = ratio of Cmax values of the metabolite compared to parent, corrected for molecular weight. Different MR reported for steady state calculated at Cycle 2 Day 1 were as follows: 1) MRAUCtau,ss = ratio of AUCtau,ss values of the metabolite compared to parent, corrected for molecular weight, where AUCtau was area under the plasma concentration-time curve over a dosing interval at steady-state; 2) MRCmax,ss = Ratio of Cmax,ss values of the metabolite compared to parent, corrected for molecular weight.

Accumulation ratio was calculated and reported for Cmax as RCmax and for AUC as RAUC. RCmax = Cmax at steady-state on Day 1 of Cycle 2 divided by Cmax on Day 1 of Cycle 1. RAUC = AUC from zero to 8 hours after drug administration at steady-state on Day 1 of Cycle 2 divided by AUC from zero to 8 hours after drug administration on Day 1 of Cycle 1.