A Mechanism-Based Pharmacokinetic/Pharmacodynamic Model for Bococizumab, a Humanized Monoclonal Antibody Against Proprotein Convertase Subtilisin/Kexin Type 9, and Its Application in Early Clinical Development.
J Clin Pharmacol
; 57(7): 855-864, 2017 07.
Article
em En
| MEDLINE
| ID: mdl-28181260
ABSTRACT
Bococizumab (RN316/PF-04950615), a humanized monoclonal antibody, binds to secreted proprotein convertase subtilisin/kexin type 9 (PCSK9) and prevents its downregulation of low-density lipoprotein receptor, leading to improved clearance and reduction of low-density lipoprotein cholesterol (LDL-C) in plasma. A mechanism-based drug-target binding model was developed, accounting for bococizumab, PCSK9, and LDL-C concentrations and the effects of concomitant administration of statins. This model was utilized to better understand the pharmacokinetic/pharmacodynamic (PK/PD) data obtained from 3 phase 1 and 2 phase 2a clinical studies. First, simulations performed with this model demonstrated that the conventional method of the area-under-the-curve ratio for bioavailability determination underestimated the subcutaneous bioavailability of bococizumab due to its target-mediated disposition. Second, a covariate model component for statin effects on bococizumab PK/PD was characterized, including a description of the decreased baseline LDL-C, increased baseline PCSK9, and increased LDL-C lowering with concomitant use of statins. Last, the impact of the dosing regimens with and without a dose holiday on bococizumab's LDL-C-lowering effectiveness was shown to be predictable due to the well-characterized PK-PD relationship.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Anticorpos Monoclonais Humanizados
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Pró-Proteína Convertase 9
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Modelos Biológicos
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Anticolesterolemiantes
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article