Trial Outcomes & Findings for First-in-Human Study of IMGC936 in Participants With Advanced Solid Tumors (NCT NCT04622774)

The study included a Dose Escalation and a Dose Expansion Phase.

First-in-Human Study of IMGC936 in Participants With Advanced Solid Tumors

An adverse event (AE) was defined as any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. Serious AEs (SAEs) were defined as death, a life-threatening AE, inpatient hospitalization or prolongation of existing hospitalization, persistent or significant disability or incapacity, a congenital anomaly or birth defect, or an important medical event that jeopardized participant and required medical intervention to prevent 1 of the outcomes listed in this definition. TEAEs were defined as any AEs with onset date between the first dose of IMGC936 and date of the last dose of IMGC936 + 30 days (inclusive) or date of the first anti-cancer therapy, whichever was earlier. A summary of other non-serious AEs and all serious AEs, regardless of causality is located in Reported AE section.

DLTs were defined based on TEAEs or abnormal laboratory values that met DLT criteria. Hematologic DLT: Grade 4 neutropenia lasting \>7 days; ≥Grade 3 febrile neutropenia Grade 4 thrombocytopenia; Grade 3 thrombocytopenia associated with bleeding; ≥Grade 3 hemolysis. Non-hematologic DLT: Any ≥Grade 3 non-hematologic event, including Grade 3 ocular symptoms and signs; Grade 2 AEs that were prolonged inordinately; • Hepatic laboratory abnormalities meeting Hy's law criteria; Eye pain or reduction in visual acuity that did not respond to topical ophthalmic therapy. Hepatic DLT: Any elevation of ≥1 transaminases \>8 \* upper limit of normal (ULN); Any Grade 3 elevation of ≥1 transaminases \>5.0-8.0 \* ULN that did not resolve to Grade 2 within 7 days and Grade 1 within 14 days; Grade 3 elevation of total bilirubin \>5 \* ULN; Any Grade 3 elevation of total bilirubin \>3.0-5.0 \* ULN that did not resolve to Grade 2 within 7 days and Grade 1 within 14 days; Any event meeting criteria for Hy's law.

ORR was defined as percentage of participants with a confirmed best overall response (BOR) of complete response (CR) or partial response (PR). CR: Disappearance of all target or non-target lesions. All pathological or non-pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 millimeters (mm). PR: At least 30% decrease in the sum of the longest diameters (SoD) of target lesions, taking as reference the baseline SoD.

ORR was defined as percentage of participants with a confirmed BOR of CR or PR. CR: Disappearance of all target or non-target lesions. All pathological or non-pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm. PR: At least 30% decrease in the SoD of target lesions, taking as reference the baseline SoD.

DOR was defined as the time from the date of the first response (CR or PR), until the date of progressive disease (PD) or death from any cause, whichever occurred first. DOR for participants who had not progressed or died at the time of analysis was censored at the date of their last tumor assessment. PD: At least a 20% increase in the SoD of target lesion, taken as reference the smallest (nadir) SoD since and including baseline. In addition to the relative increase of 20%, the SoD must also demonstrate an absolute increase of at least 5 mm. Unequivocal progression of non-target lesions. Unequivocal progression should not normally trump target lesion status. It must be representative of overall disease status change, not a single lesion increase. DOR was estimated using the Kaplan-Meier method.

PFS was defined as the time from initiation of study drug until the date of PD or death whichever occurred first, estimated using the Kaplan-Meier method. PD: At least a 20% increase in the SoD of target lesion, taken as reference the smallest (nadir) SoD since and including baseline. In addition to the relative increase of 20%, the SoD must also demonstrate an absolute increase of at least 5 mm. Unequivocal progression of non-target lesions and appearance of new lesions. Unequivocal progression should not normally trump target lesion status. It must be representative of overall disease status change, not a single lesion increase.

An AE was defined as any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. SAEs were defined as death, a life-threatening AE, inpatient hospitalization or prolongation of existing hospitalization, persistent or significant disability or incapacity, a congenital anomaly or birth defect, or an important medical event that jeopardized participant and required medical intervention to prevent 1 of the outcomes listed in this definition. TEAEs were defined as any AEs with onset date between the first dose of IMGC936 and date of the last dose of IMGC936 + 30 days (inclusive) or date of the first anti-cancer therapy, whichever was earlier. A summary of other non-serious AEs and all serious AEs, regardless of causality is located in Reported AE section.