AMG 172 First in Human Study in Patients With Kidney Cancer

• Clinically significant or ≥ Grade 3 CTCAE changes in safety laboratory tests, physical examinations, ECGs, or vital signs [ Time Frame: 28 days after the last subject enrolled of each cohort in Part 1 and every 10 subjects enrolled in Part 2 (if available) ] [ Designated as safety issue: Yes ]
• PK parameters including but not limited to, maximum observed concentration (Cmax), area under the concentration-time curve (AUC) and half life (t1/2) [ Time Frame: 12 time points up to 8 weeks ] [ Designated as safety issue: No ]
• Objective response rate for subjects treated at MTD based on RECIST 1.1 [ Time Frame: 3 years ] [ Designated as safety issue: No ]

• Development of human anti-human antibody against AMG 172 [ Time Frame: 1 year ] [ Designated as safety issue: Yes ]
• Objective response rate for subjects not treated at MTD based on RECIST 1.1 [ Time Frame: 3 years ] [ Designated as safety issue: No ]
• Clinical benefit as measured by duration of response per RECIST 1.1 [ Time Frame: 3 years ] [ Designated as safety issue: No ]

This is the first-in-human (Phase I) study of AMG 172, an antibody drug conjugate (ADC), in patients with kidney cancer [Clear Cell Renal Cell Carcinoma (ccRCC)] who have relapsed or who have refractory disease following at least two prior therapies. The purpose of the study is to evaluate safety and pharmacokinetics (PK) of AMG 172, and also evaluate the objective response rate in patients with ccRCC receiving AMG 172. The study will be conducted in two Parts: Part 1 will explore doses of AMG 172 to determine the safety, tolerability and pharmacokinetics to establish a maximum tolerated dose (MTD), and Part 2 (dose expansion) will examine safety, tolerability, PK and overall response rate in subjects treated at the MTD established in Part 1.

This First in- human study of AMG 172 will be conducted in two parts: Part 1 (dose exploration) and Part 2 (dose expansion). Part 1 of the study is aimed at evaluating the safety, tolerability and PK of AMG 172 in subjects with in subjects with relapsed / refractory cc RCC, and Part 2 is aimed at evaluating safety, tolerability, PK and response rate. Up to 40 subjects may be enrolled in Part 1, and up to 20 subjects may be enrolled in Part 2. The dose of AMG 172 utilized in Part 2 will be dependent upon data obtained in Part 1 of the study.

• Renal Cell Adenocarcinoma
• Clear Cell Renal Carcinoma
• Clear Cell Renal Cell Carcinoma
• Renal Cell Carcinoma

• Experimental: Dose exploration
  Pre-specified nominal doses are proposed in the dose exploration. Intermediate doses may also be used if required based on the Continuous Reassessment Method (CRM) design.
  Intervention: Drug: AMG 172
• Experimental: Dose expansion
  Dose selected from Part 1 dose exploration.
  Intervention: Drug: AMG 172

Inclusion Criteria:

• Subjects must have a pathologically documented, definitively diagnosed, clear cell RCC that is relapsed/refractory following at least two lines of systemic therapy (one of which must be a tyrosine kinase), or the subject refuses standard therapy
• Measurable disease per RECIST 1.1 criteria. Subjects with non-measurable, but evaluable disease are also eligible for Part 1 of the study.
• Eastern Cooperative Oncology Group (ECOG) Performance Status of ≤ 1
• Willing to provide tumor samples and / or slides

• Hematological function, as follows:

  1. Absolute neutrophil count (ANC) ≥ 1.5 x 10^9/L;
  2. Platelet count ≥ 100 x 10^9/L;
  3. Hemoglobin > 9 g/dL
• Prothrombin time (PT) or partial thromboplastin time (PTT) < 1.5 x institutional upper limit of normal (IULN)

• Hepatic function, as follows:

  1. Aspartate aminotransferase (AST) or alanine aminotransferase (ALT) < 3 x ULN;
  2. Total bilirubin < 1.5 x ULN (< 3.0 x ULN for subjects with documented Gilbert's Disease or for whom the indirect bilirubin level suggests an extrahepatic source of elevation);
  3. Alkaline phosphatase < 2 x ULN (< 5 x ULN in subjects whom the PI and sponsor agree that clinical data suggest extrahepatic source of elevation)
• Other inclusion criteria may apply

Exclusion Criteria:

• Known primary central nervous system (CNS) tumors or brain metastases
• History of bleeding diathesis
• Myocardial infarction within 6 months of study day 1, symptomatic congestive heart failure (New York Heart Association > class II), unstable angina, or unstable cardiac arrhythmia requiring medication, or uncontrolled hypertension in the opinion of the investigator
• Clinically significant ECG changes which obscure the ability to assess the PR, QT, and QRS interval; congenital long QT syndrome
• A baseline ECG QTcF > 470 msec
• Known positive test for human immunodeficiency virus (HIV)
• Known acute or chronic hepatitis B or hepatitis C infection as determined by serologic tests
• Other exclusion criteria may apply