Modeling and Simulation for Medical Product Development and Evaluation: Highlights from the FDA-C-Path-ISOP 2013 Workshop

Medical-product development has become increasingly challenging and resource-intensive. In 2004, the Food and Drug Administration (FDA) described critical challenges facing medical-product development by establishing the critical path initiative. Priorities identified included the need for improved modeling and simulation tools, further emphasized in FDA’s 2011 Strategic Plan for Regulatory Science. In an effort to support and … Continued

Application of PBPK Modeling to Predict Monoclonal Antibody Disposition in Plasma and Tissues in Mouse Models of Human Colorectal Cancer

This investigation evaluated the utility of a physiologically based pharmacokinetic (PBPK) model, which incorporates model parameters representing key determinants of monoclonal antibody (mAb) target-mediated disposition, to predict, a priori, mAb disposition in plasma and in tissues, including tumors that express target antigens. Monte Carlo simulation techniques were employed to predict the disposition of two mAbs, 8C2 (as a non-binding control mouse IgG1 mAb) and T84.66 (a high-affinity murine IgG1 anti-carcinoembryonic antigen … Continued

Methods of Solving Rapid Binding Target-mediated Drug Disposition Model for Two Drugs Competing for the Same Receptor

The target-mediated drug disposition (TMDD) model has been adopted to describe pharmacokinetics for two drugs competing for the same receptor. A rapid binding assumption introduces total receptor and total drug concentrations while free drug concentrations C (A) and C (B) are calculated from the equilibrium (Gaddum) equations. The Gaddum equations are polynomials in C (A) and C (B) of second degree that have explicit solutions involving complex numbers. The aim of this study was to develop … Continued

Dose Correction for the Michaelis-Menten Approximation of the Target—Mediated Drug Disposition Model

The Michaelis-Menten (M-M) approximation of the target-mediated drug disposition (TMDD) pharmacokinetic (PK) model was derived based on the rapid binding (RB) or quasi steady-state (QSS) assumptions that implied that the target and drug binding and dissociation were in equilibrium. However, the initial dose for an IV bolus injection for the M-M model did not account … Continued

Population Pharmacokinetic-pharmacodynamic-disease Progression Model for Effects of Anakinra in Lewis Rats with Collagen-induced Arthritis

A population pharmacokinetic-pharmacodynamic-disease progression (PK/PD/DIS) model was developed to characterize the effects of anakinra in collagen-induced arthritic (CIA) rats and explore the role of interleukin-1ß (IL-1ß) in rheumatoid arthritis. The CIA rats received either vehicle, or anakinra at 100 mg/kg for about 33 h, 100 mg/kg for about 188 h, or 10 mg/kg for about … Continued

Physiologically-based Pharmacokinetic Model for Topotecan in Mice

Topotecan is a chemotherapeutic agent of choice for the second-line treatment of recurrent ovarian cancer. In this article, we have developed a physiologically based pharmacokinetic model to characterize and predict topotecan concentrations in mouse plasma and tissues. Single intravenous (IV) doses (5, 10 and 30 mg/kg) of topotecan were administered to male Swiss Webster mice, … Continued

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