A Framework for Quantitative Systems Pharmacology Model Execution

  • 0M&S Decisions FZ LLC, Dubai, UAE. victor.sokolov@msdecisions.tech.

|

|

Summary

This summary is machine-generated.

This chapter outlines the quantitative systems pharmacology (QSP) modeling workflow for drug development. It details challenges in model development, calibration, and simulation using ordinary differential equations.

Area Of Science

  • Pharmacology
  • Computational Biology
  • Mathematical Modeling

Background

  • Mathematical models approximate observed patterns, guiding research and development in new medicines, particularly dose-exposure-response relationships.
  • Quantitative Systems Pharmacology (QSP) models mechanistically characterize biological systems and therapeutic interventions.

Purpose Of The Study

  • To provide a comprehensive overview of the QSP modeling workflow.
  • To highlight challenges in QSP model development, calibration, and interpretation.
  • To serve as a resource for both new and experienced QSP modelers.

Main Methods

  • Utilizing ordinary differential equations as a central framework for model construction.
  • Incorporating systematic literature reviews and selecting appropriate structural model equations.
  • Performing system behavior analysis, model qualification, and various model-based simulations.

Main Results

  • QSP model development requires integrating existing knowledge and diverse datasets, balancing complexity and uncertainty.
  • Data scarcity, especially at the human subject level, complicates QSP model calibration, necessitating early sensitivity analyses.
  • Model-based predictions must be carefully aligned with underlying data and mathematical methods.

Conclusions

  • The QSP modeling workflow involves defining, qualifying, and simulating models, with variations based on objectives.
  • Addressing challenges in QSP requires a deep understanding of physiology and advanced parameter estimation techniques.
  • The described workflow offers practical guidance and resources for implementing QSP methodologies.

Related Concept Videos

Pharmacokinetic Models: Overview 01:20

531

Pharmacokinetic models utilize mathematical analysis to achieve a detailed quantitative understanding of a drug's life cycle within the body. They are instrumental in simulating a drug's pharmacokinetic parameters, predicting drug concentrations over time, optimizing dosage regimens, linking concentrations with pharmacologic activity, and estimating potential toxicity.
There are three primary types of models: empirical, compartment, and physiological. Empirical models, with minimal...

Pharmacokinetic Models: Comparison and Selection Criterion 01:26

33

Physiological and compartmental models are valuable tools used in studying biological systems. These models rely on differential equations to maintain mass balance within the system, ensuring an accurate representation of the dynamic processes at play.
Physiological models take a detailed approach by considering specific molecular processes. They can predict drug distribution, metabolism, and elimination changes, providing a comprehensive understanding of how drugs interact with the body.

Model Approaches for Pharmacokinetic Data: Distributed Parameter Models 01:06

54

Pharmacokinetic models are mathematical constructs that represent and predict the time course of drug concentrations in the body, providing meaningful pharmacokinetic parameters. These models are categorized into compartment, physiological, and distributed parameter models.
The distributed parameter models are specifically designed to account for variations and differences in some drug classes. This model is particularly useful for assessing regional concentrations of anticancer or...

Mechanistic Models: Overview of Compartment Models 01:21

54

Mechanistic models, a category encompassing both physiological and compartmental modeling, differ from empirical models' approaches to incorporating known factors about the systems being modeled. Empirical models describe data with minimal assumptions, while mechanistic models aim to provide a robust description of available data by specifying assumptions and integrating known factors about the system. Compartmental analysis is a key example of a mechanistic model in pharmacokinetics and...

Model Approaches for Pharmacokinetic Data: Physiological Models 01:15

26

Physiological models in pharmacokinetics are instrumental in understanding the distribution and elimination of drugs within the body. These models describe the drug concentration within target organs, influenced by factors such as drug uptake, tissue volume, and blood flow. Drug uptake is governed by the partition coefficient, which signifies the drug concentration ratio in tissue to that in the blood. The blood flow rate to a specific tissue is expressed as Qt, and the rate of change in tissue...

Model Approaches for Pharmacokinetic Data: Compartment Models 01:14

68

Compartmental analysis is a widely adopted approach to characterizing drug pharmacokinetics. It uses compartment models that conceptualize the body as a collection of reversibly communicating compartments, each representing a group of tissues exhibiting similar drug distribution characteristics. The movement rate of the drug between these compartments is typically described by first-order kinetics.
Two primary types of compartment models are recognized: mammillary and catenary. The more...