Physiologically Based Pharmacokinetic (PBPK) Modeling of Amoxicillin Absorption and Pharmacokinetics

Physiologically Based Pharmacokinetic (PBPK) Modeling of Amoxicillin Absorption and Pharmacokinetics

Conference: AAPS
Software: GastroPlus®
Division: Simulations Plus

Purpose of the study was to develop a PBPK model for amoxicillin incorporating saturable transport processes affecting the drug’s absorption and distribution.

PBPK Modeling of Erythromycin Absorption and Disposition Mediated by Transporters in Humans

PBPK Modeling of Erythromycin Absorption and Disposition Mediated by Transporters in Humans

Conference: AAPS
Division: Simulations Plus

Erythromycin, a macrolide antibiotic, is cleared primarily by cytochrome P450-3A4 metabolism. Its uptake into enterocytes and hepatocytes is mediated by organic anion transporter (OAT) and organic anion…

Excellence Is a Team Sport

Excellence Is a Team Sport

Scientific excellence–asking the right question, then designing and conducting a valid study that answers that question and influences future research–is widely accepted as a benchmark for success in research. However, excellence of a more complicated sort is required in Pharma research. For example, excellence in pharmacometric modeling and simulation has to encompass 3 types of excellence: strategic, operational, and technical.

Inventors and innovation

Inventors and innovation

Elmer Sperry (1860-1930) is remembered as the father of cybernetic (feedback control) engineering. He was the author of more than 350 patents in a wide range of fields, and he developed gyro-controlled steering and fire control systems used on Allied warships during World War I and World War II. He was among the first of the independent inventors of the early 20th century to be elected to the National Academy of Sciences (1).

The problem with gaps.

The problem with gaps.

After writing about gap analysis for the Pharma of the Future? blog, I went in search of an example that would illustrate the problem of defining “gaps” and stumbled on a piece called Reading and Guilty Pleasure in the New York Times. The writer, Gary Gutting, describes 2 assumptions underlying the concept of a guilty pleasure: some books are objectively inferior to others, and “better” books are generally not very enjoyable. So, are “better” books actually better? Gutting says that in discussions of this sort, people will often adopt a relativist position:

Mind the gap

Mind the gap

I was talking with a Program Director the other day about an upcoming regulatory filing. She was rightly proud of the clinical pharmacology work that had been completed, but she was also anxious about possible holes in the package. As we talked, I thought about how gap analyses have changed over the years, particularly since modeling and simulation results have come to play a larger part in the Clinical Pharmacology Summary in NDA submissions.

The Use of Modeling Tools to Drive Efficient Oral Product Design

The Use of Modeling Tools to Drive Efficient Oral Product Design

Authors: Mathias NR, Crison J
Publication: AAPS J
Software: GastroPlus®

Modeling and simulation of drug dissolution and oral absorption has been increasingly used over the last decade to understand drug behavior in vivo based on the physicochemical properties of Active...

Preclinical Assessment of the Absorption and Disposition of the Phosphatidylinositol 3-Kinase/Mammalian Target of Rapamycin Inhibitor GDC-0980 and Prediction of Its Pharmacokinetics and Efficacy in Human

Preclinical Assessment of the Absorption and Disposition of the Phosphatidylinositol 3-Kinase/Mammalian Target of Rapamycin Inhibitor GDC-0980 and Prediction of Its Pharmacokinetics and Efficacy in Human

Publication: Drug Metab Dispos
Software: GastroPlus®

The objectives of these studies were to characterize the absorption and disposition of GDC-0980 and assess its efficacy in an MCF7-neo/HER2 human breast cancer xenograft model in immunocompromised mice.

Application of PBPK modeling to predict human intestinal metabolism of CYP3A substrates – An evaluation and case study using GastroPlus™

Application of PBPK modeling to predict human intestinal metabolism of CYP3A substrates – An evaluation and case study using GastroPlus™

Publication: Eur J Pharm Sci
Software: GastroPlus®

First pass metabolism in the intestinal mucosa is a determinant of oral bioavailability of CYP3A substrates and so the prediction of intestinal availability (Fg) of potential drug candidates is important.

Predicting feasibility and characterizing performance of extended-release formulations using physiologically based pharmacokinetic modeling

Predicting feasibility and characterizing performance of extended-release formulations using physiologically based pharmacokinetic modeling

Publication: Ther Deliv
Software: GastroPlus®

This review presents nine case studies where physiologically based pharmacokinetic modeling has been used in the design and development of extended-release formulations.