A Phase 1 First in Human Study Evaluating the Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of AMG 176 in Subjects With Relapsed or Refractory Multiple Myeloma and Subjects With Relapsed or Refractory Acute Myeloid Leukemia

Number of Participants Who Experienced a Dose Limiting Toxicity (DLT)

时间窗: Days 1 to 28 of cycle 1 (4 weeks)

A DLT was assessed by the Common Terminology Criteria for Adverse Events (CTCAE) v 4.0, and considered by the investigators to be related to AMG 176. A DLT was defined as a grade 3 or higher non-hematological or a grade 4 hematologic adverse event (AE) that occurred during the DLT observation period. CTCAE is graded from grade 1 to 5, with higher grades indicating a worse outcome, and included; grade 1 = mild, grade 2= moderate, grade 3 = severe, grade 4 = life-threatening, and grade 5 = death.

Number of Participants Who Experienced Treatment-emergent Adverse Events (TEAEs)

时间窗: Day 1 cycle 1 to 30 days after the last dose of AMG 176; median treatment duration was 1.2 months

An AE was defined as any untoward medical occurrence in a clinical trial participant. A TEAE was an AE that started on or after the first dose of investigational product (AMG 176) up to 30 days after the end of investigational product. Any clinically significant changes in vital signs, electrocardiograms, and clinical laboratory tests were reported as TEAEs. A treatment-related AE was any TEAE that per investigator review had a reasonable possibility of being caused by the investigational product (AMG 176).

Maximum Observed Concentration (Cmax) of AMG 176

时间窗: Parts 1B, 3B, 3C, 3A (cohort 4) Cycle 1: day 1 pre, end of infusion (EOI), 1, 2, 3, 5, 7 hrs EOI, day 8 pre, EOI; Part 3D also days 9, 15 pre and EOI; Parts 1A, 3 (except cohort 4), 4: also day 2 pre, EOI, 1, 2, 3, 5, 7 hrs EOI, day 9 pre and EOI

Plasma concentrations of AMG 176 were determined using a validated assay. Noncompartmental analysis was performed for estimation of pharmacokinetic (PK) parameters. Concentrations below the lower limit of quantification (LLOQ) of 5.00 ng/mL were set to zero before data analysis.

Area Under the Concentration-time Curve (AUC) From Time 0 to 24 Hours (AUC0-24) of AMG 176 (Parts 1A, 3A [Cohorts 1, 2, and 3], and 4 [Cohorts 5A and 5B])

时间窗: Parts 1A, 3A and, 4: Cycle 1 day 1 pre, EOI, 1, 2, 3, 5, and 7 hrs EOI, cycle 1 day 8 pre and EOI

Plasma concentrations of AMG 176 were determined using a validated assay. Noncompartmental analysis was performed for estimation of PK parameters. Concentrations below the LLOQ of 5.00 ng/mL were set to zero before data analysis.

AUC From Time 0 to 144 Hours (AUC0-144) of AMG 176 (Parts 1A, 3A [Cohorts 1, 2, and 3], and 4 [Cohorts 5A and 5B])

时间窗: Parts 1A, 3A, and 4: Cycle 1 day 2 pre, EOI, 1, 2, 3, 5, and 7 hrs EOI, cycle 1 day 9 pre and EOI

Plasma concentrations of AMG 176 were determined using a validated assay. Noncompartmental analysis was performed for estimation of PK parameters. Concentrations below the LLOQ of 5.00 ng/mL were set to zero before data analysis.

AUC From Time 0 to 168 Hours (AUC0-168) of AMG 176 (Parts 1B, 3 [Cohort 4], 3B, 3C, and 3D)

时间窗: Parts 1B, 3B, 3C, and 3 (cohort 4): Cycle 1 day 1 pre, EOI, 1, 2, 3, 5, and 7 hrs EOI, cycle 1 day 8 pre, EOI; Part 3d also cycle 1 day 15 pre and EOI

Plasma concentrations of AMG 176 were determined using a validated assay. Noncompartmental analysis was performed for estimation of PK parameters. Concentrations below the LLOQ of 5.00 ng/mL were set to zero before data analysis.

Clearance (CL) of AMG 176

时间窗: Parts 1B, 3B, 3C, 3A (cohort 4) Cycle 1: day 1 pre, EOI, 1, 2, 3, 5, 7 hrs EOI, day 8 pre, EOI; Part 3D also days 9, 15 pre and EOI; Parts 1A, 3 (except cohort 4), 4: also day 2 pre, EOI, 1, 2, 3, 5, 7 hrs EOI, day 9 pre and EOI

Plasma concentrations of AMG 176 were determined using a validated assay. Noncompartmental analysis was performed for estimation of PK parameters. Concentrations below the LLOQ of 5.00 ng/mL were set to zero before data analysis. Clearance was calculated as Dose/ AUC0-144 for Parts 1A, 3A, and 4; and as Dose/AUC0-168 for Parts 1B, 3 (Cohort 4 only) 3B, 3C, and 3D.

Terminal Half-life (t1/2) of AMG 176

时间窗: Parts 1B, 3B, 3C, 3A (cohort 4) Cycle 1: day 1 pre, EOI, 1, 2, 3, 5, 7 hrs EOI, day 8 pre, EOI; Part 3D also days 9, 15 pre and EOI; Parts 1A, 3 (except cohort 4), 4: also day 2 pre, EOI, 1, 2, 3, 5, 7 hrs EOI, day 9 pre and EOI

Plasma concentrations of AMG 176 were determined using a validated assay. Noncompartmental analysis was performed for estimation of PK parameters. Concentrations below the LLOQ of 5.00 ng/mL were set to zero before data analysis.