A Study Of PF-06647263 In Patients With Advanced Solid Tumors

DLTs were defined as any of the following adverse events (AEs) which were not considered related to disease progression occurring in the first cycle of treatment:(1)Hematologic: grade 4 neutropenia lasting >7 days; febrile neutropenia (defined as neutropenia >=Grade 3 and a single body temperature >38.3°C or a sustained temperature of >=38°C for more than 1 hour); grade >=3 neutropenia with infection; any grade thrombocytopenia associated with clinically significant or life threatening bleeding; grade 4 thrombocytopenia >=72 hours or platelets <=10,000/mm^3 regardless of duration. (2)Non- hematologic: bilirubin increase >=2 × upper limit of normal (ULN) and not related to disease progression or other known cause; all other Grade >=3 toxicities, except those that had not been maximally treated (eg, nausea, vomiting, diarrhea); delay by more than 2 weeks in receiving the next scheduled cycle due to persisting toxicities not attributable to disease progression.

Objective response rate (ORR) refers to percentage of participants who achieved complete response (CR) or partial response (PR) determined by Response Evaluation Criteria in Solid Tumors (RECIST) v 1.1. A participant achieved CR if both target and non-target lesions achieved CR, no new lesions; achieved PR if target lesions achieved CR or PR, non-target lesions were assessed as non-CR/non-PD (progressive disease), indeterminate or missing, and no new lesions. For target lesions, CR: complete disappearance of all target lesions except nodal disease (target nodes must decrease to normal size); PR: >= 30% decrease under baseline of the sum of diameters of all target measurable lesions. For non-target lesions, CR: disappearance of all non-target lesions and normalization of tumor marker levels and all lymph nodes must be normal in size; non-CR/non-PD: persistence of any non-target lesions and/or tumor marker level above the normal limits.

An AE was any untoward medical occurrence in a clinical investigation patient administered a product or medical device; the event need not necessarily have a causal relationship with the treatment or usage. Any events occurring following start of treatment or increasing in severity were counted as treatment-emergent.

An AE was any untoward medical occurrence in a clinical investigation patient administered a product or medical device; the event need not necessarily have a causal relationship with the treatment or usage. Any events occurring following start of treatment or increasing in severity were counted as treatment-emergent.

A SAE was any untoward medical occurrence at any dose that: resulted in death; was life-threatening (immediate risk of death); required inpatient hospitalization or prolongation of existing hospitalization; resulted in persistent or significant disability/incapacity (substantial disruption of the ability to conduct normal life functions); resulted in congenital anomaly/birth defect. Any events occurring following start of treatment or increasing in severity were counted as treatment-emergent.

A SAE was any untoward medical occurrence at any dose that: resulted in death; was life-threatening (immediate risk of death); required inpatient hospitalization or prolongation of existing hospitalization; resulted in persistent or significant disability/incapacity (substantial disruption of the ability to conduct normal life functions); resulted in congenital anomaly/birth defect. Any events occurring following start of treatment or increasing in severity were counted as treatment-emergent.

Following parameters were analyzed for examination of vital signs: sitting systolic and diastolic blood pressure (SBP & DBP), and sitting pulse rate. The abnormal criteria were: (1) minimum SBP <90mmHg; (2) SBP change from baseline, maximum decrease >=30mmHg or maximum increase >=30mmHg; (3) minimum DBP <50mmHg; (4) DBP change from baseline, maximum decrease >=20mmHg or maximum increase >=20mmHg; (5) minimum supine pulse rate <40 BPM or maximum supine pulse rate >120 BPM.

AUC504 was determined by linear/log trapezoidal method. AUC504 analysis only applied to QW groups.

Tau is dosing interval, where tau=168 hours for the QW dosing and 504-hour for the Q3W dosing. AUC tau was determined by linear/log trapezoidal method. In time frame, C=cycle, D=day.

Maximum observed serum concentration Cmax was determined directly from data. In time frame, C=cycle, D=day.

Tmax was determined directly from data as time of first occurrence. In time frame, C=cycle, D=day.

For single dose, CL was determined by Dose/AUCinf while for multiple dose, CL was determined by Dose/AUCtau. AUCinf was the area under the serum concentration-time profile from time 0 extrapolated to infinite time. In time frame, C=cycle, D=day.

Vss was determined by CL × MRT (mean residence time). MRT=[AUMCtau +tau(AUCinf-AUCtau)]/AUCtau. AUMCtau was the area under the first moment curve derived using the linear/log trapezoidal method. In time frame, C=cycle, D=day.

T1/2 was determined by loge(2)/kel, where kel is the terminal phase rate constant calculated by a linear regression of the log linear concentration-time curve. The t1/2 analysis only applied to Q3W group. In time frame, C=cycle, D=day.

AUC504 was determined by linear/log trapezoidal method. AUC504 analysis only applied to QW groups. PF-06647263 is an antibody-drug conjugate (ADC) which comprises total antibody (PF-06523432) and unconjugated payload ( CL-184538).

Tau is dosing interval, where tau=168 hours for the QW dosing and 504-hour for the Q3W dosing. AUC tau was determined by linear/log trapezoidal method. PF-06647263 is an antibody-drug conjugate (ADC) which comprises total antibody (PF-06523432) and unconjugated payload ( CL-184538). In time frame, C=cycle, D=day.

Cmax was determined directly from data. PF-06647263 is an antibody-drug conjugate (ADC) which comprises total antibody (PF-06523432) and unconjugated payload ( CL-184538). In time frame, C=cycle, D=day.

Tmax was determined directly from data as time of first occurrence. PF-06647263 is an antibody-drug conjugate (ADC) which comprises total antibody (PF-06523432) and unconjugated payload ( CL-184538). In time frame, C=cycle, D=day.

For single dose, CL was determined by Dose/AUCinf while for multiple dose, CL was determined by Dose/AUCtau. PF-06647263 is an antibody-drug conjugate (ADC) which comprises total antibody (PF-06523432) and unconjugated payload ( CL-184538). In time frame, C=cycle, D=day.

Vss was determined by CL × MRT (mean residence time). MRT=[AUMCtau +tau(AUCinf-AUCtau)]/AUCtau. AUMCtau was the area under the first moment curve derived using the linear/log trapezoidal method. PF-06647263 is an antibody-drug conjugate (ADC) which comprises total antibody (PF-06523432) and unconjugated payload ( CL-184538). In time frame, C=cycle, D=day.

T1/2 was determined by loge(2)/kel, where kel is the terminal phase rate constant calculated by a linear regression of the log linear concentration-time curve. The t1/2 analysis only applied to Q3W group. PF-06647263 is an antibody-drug conjugate (ADC) which comprises total antibody (PF-06523432) and unconjugated payload ( CL-184538). In time frame, C=cycle, D=day.

Cmax was determined directly from data. PF-06647263 is an antibody-drug conjugate (ADC) which comprises total antibody (PF-06523432) and unconjugated payload ( CL-184538).

Following parameters were analyzed for laboratory examination: hematology, blood chemistry, coagulation panel, urinalysis and pregnancy test.

Positive was defined as: anti-drug antibody (ADA) titer >=1.88. In time frame, C=cycle, D=day.

Positive was defined as: neutralizing antibody titer >=1.30. In time frame, C=cycle, D=day.

Treatment-Emergent=Baseline negative with at least one positive ADA sample post-treatment. Treatment-Boosted=Baseline positive but endpoint titer (log10-scale titer) increases by at least 0.5 (representing 3-fold titer increase). In time frame, C=cycle, D=day.

Objective response rate (ORR) refers to percentage of participants who achieved complete response (CR) or partial response (PR) determined by Response Evaluation Criteria in Solid Tumors (RECIST) v 1.1. A participant achieved CR if both target and non-target lesions achieved CR, no new lesions; achieved PR if target lesions achieved CR or PR, non-target lesions were assessed as non-CR/non-PD (progressive disease), indeterminate or missing, and no new lesions. For target lesions, CR: complete disappearance of all target lesions except nodal disease (target nodes must decrease to normal size); PR: >= 30% decrease under baseline of the sum of diameters of all target measurable lesions. For non-target lesions, CR: disappearance of all non-target lesions and normalization of tumor marker levels and all lymph nodes must be normal in size; non-CR/non-PD: persistence of any non-target lesions and/or tumor marker level above the normal limits.

Clinical Benefit Response (CBR) was defined as a CR, PR or stable disease (SD) ≥6 cycles. CR was defined as disappearance of all target lesions. PR was defined as at least a 30% decrease in the sum of diameters of target lesions, taking as the reference of baseline sum diameters. Stable disease was defined as neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for PD (progressive disease: >=20% increase in the sum of diameters of target lesions and an absolute increase of >=5mm or appearance of >=1 new lesion), taking as reference the smallest sum diameters while on study.

The progression free survival (PFS) was defined as the time from Cycle 1 Day 1 to first documentation of disease progression or to death due to any cause, whichever occurred first. PFS was characterized by the estimate median time to event which was derived using Kaplan-Meier method.