Pharmacokinetics Study of AMG 423 in Healthy Subjects and Subjects With Various Degrees of Renal Insufficiency

Inclusion Criteria: * Men or women ≥18 years of age * Laboratory test values (clinical chemistry and hematology)within normal limits, (other than test values out of the normal range for subjects with CKD \[groups 1 and 3 through 5\]), or clinically acceptable to the investigator and sponsor at screening and day -3 * Free of any clinically significant disease or condition(s) (other than that consistent with CKD for subjects in groups 1 and 3 through 5) that require a physician's care and/or would interfere with the evaluations, procedures, or participation in the study per the investigator's discretion; Exclusion Criteria: * Subjects whose second MDRD eGFR result during the screening period is not within 10% of the first eGFR result * Subjects who have received a functioning renal transplant within the past year * Subjects with ESRD who do not have a functioning hemodialysis access * Subjects with hemodynamic instability during hemodialysis * Subjects whose renal insufficiency is due to active autoimmune renal disease * Subjects with renal insufficiency or ESRD requiring hemodialysis and Troponin I \> upper limit of normal (ULN) at screening or day -3 * Subjects with history of heart disease or unstable angina within the last 3 months * Subjects with uncontrolled diabetes (Hb1Ac \> 8%) and/or subjects who are able but unwilling to adhere to the required fasting intervals