Abstract:
:This analysis was conducted to characterize the pharmacokinetics and pharmacodynamics of pegfilgrastim and to develop a pharmacokinetic-pharmacodynamic model to describe the granulopoietic effects of pegfilgrastim and the homeostatic regulation of pegfilgrastim clearance in healthy subjects. Pegfilgrastim serum concentration data and differential white cell counts were obtained from an open-label, single-dose, dose escalation study. Healthy subjects (8 subjects/dose group) received a single subcutaneous dose of 30, 60, 100, or 300 microg/kg pegfilgrastim. Pegfilgrastim exhibited nonlinear pharmacokinetics; clearance decreased with increasing dose. A dose-dependent increase in absolute neutrophil count with an increase in the percentage of band cells was observed. A pharmacokinetic-pharmacodynamic model was developed that adequately described the nonlinear pharmacokinetics of pegfilgrastim, feedback regulation of pegfilgrastim clearance by neutrophils, and the differential effects of pegfilgrastim on neutrophil populations in blood.
journal_name
J Clin Pharmacoljournal_title
Journal of clinical pharmacologyauthors
Roskos LK,Lum P,Lockbaum P,Schwab G,Yang BBdoi
10.1177/0091270006288731subject
Has Abstractpub_date
2006-07-01 00:00:00pages
747-57issue
7eissn
0091-2700issn
1552-4604pii
46/7/747journal_volume
46pub_type
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