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Safety and pharmacokinetics of PF-04360365 following a single-dose intravenous infusion in Japanese subjects with mild-to-moderate Alzheimer's disease: a multicenter, randomized, double-blind, placebo-controlled, dose-escalation study

Safety and pharmacokinetics of PF-04360365 following a single-dose intravenous infusion in Japanese subjects with mild-to-moderate Alzheimer's disease: a multicenter, randomized, double-blind, placebo-controlled, dose-escalation study

International Journal of Clinical Pharmacology and Therapeutics 51(12): 911-923

PF-04360365 is a humanized IgG(2)Δa anti-amyloid β (Aβ) antibody designed to improve outcome in Alzheimer's disease (AD). Single doses of 0.1 - 10 mg/kg were safe and well tolerated in Western (mostly Caucasian) subjects with mild-to-moderate AD. This Phase 1, multicenter, randomized, double-blind, dose-escalation study was the first to evaluate the safety, pharmacokinetics, pharmacodynamics, and immunogenicity of PF-04360365 in Japanese subjects. 30 subjects with mild-to-moderate AD were enrolled. In each cohort, 3 subjects received PF-04360365 (0.1, 0.5, 1, 5, or 10 mg/kg) and 1 subject received placebo as a single 2-hour intravenous infusion. Subjects were monitored as inpatients for 24 hours and then as outpatients for 1 year. All subjects completed the study. There were no serious or National Cancer Institute Common Terminology Criteria for Adverse Events grade ≥ 3 adverse events, hypersensitivity reactions, or antidrug antibodies. No clinical or MRI evidence of brain microhemorrhage, cerebral edema, or encephalitis was observed. PF-04360365 plasma concentrations increased with dose, and pharmacokinetics were consistent with a small steady-state volume of distribution, slow clearance, and long elimination half-life. Cerebrospinal fluid (CSF):plasma ratios were < 0.5%. Plasma Aβ species showed dose-dependent increases in C(max) and AUC(∞), but CSF biomarkers did not differ clearly between treatment arms. PF-04360365 was safe and well tolerated in Japanese subjects. Pharmacokinetics and plasma pharmacodynamic responses in Japanese subjects were comparable to those in Western subjects. *No longer affiliated with Pfizer.

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Accession: 055643220

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PMID: 24131736

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