Related Experiment Video
Updated: Aug 2, 2026

Ex Vivo Intestinal Sacs to Assess Mucosal Permeability in Models of Gastrointestinal Disease
Published on: February 9, 2016
Modeling intestinal absorption and other nutrition-related processes using PSPICE and STELLA
1Department of Physiology, Medical College of Virginia, Virginia Commonwealth University, Richmond.
SPICE models systematically translate biological systems into network diagrams for simulation. While STELLA offers user-friendly alternatives for simpler problems, SPICE provides broader applicability for complex biological simulations.
Area of Science:
- Systems biology
- Computational modeling
Background:
- Biological systems are complex and require systematic methods for analysis.
- Simulation models aid in understanding intricate biological processes.
Purpose of the Study:
- To describe the construction and application of SPICE models for biological systems.
- To compare SPICE with other simulation methods like STELLA.
Main Methods:
- SPICE models translate biological systems into network diagrams.
- Flows through barriers and chemical reactions are represented as network branches.
- Compartments within tissues are connected based on flowing entities.
Main Results:
- SPICE models offer a disciplined, systematic approach to biological simulation.
- Simple mechanisms are foundational, allowing for elaboration to complex systems.
- SPICE models are broadly applicable, unlike some methods with inherent limitations.
Conclusions:
- SPICE provides a robust framework for simulating complex biological systems.
- STELLA is a user-friendly alternative suitable for simpler simulation tasks.
- Understanding and mastering basic mechanisms are key to building sophisticated SPICE models.
Related Concept Videos
Methods for Studying Drug Absorption: In vitro
The diffusion cell method uses a two-compartment cell, including a donor compartment with the drug solution, which simulates the environment where the drug is applied, and a receptor compartment with a buffer solution, which simulates the environment...
Methods for Studying Drug Absorption: In situ
The Doluisio method involves perfusing a prepared segment of a rat's small intestine with a solution of radiolabeled drug and a non-absorbable marker. This helps to differentiate between absorbed and non-absorbed drug concentrations. The intestinal segment is connected at both ends using tubing and syringes,...
One-Compartment Open Model for Extravascular Administration: Zero-Order Absorption Model
Zero-order absorption maintains a steady rate irrespective of the amount of drug left to be absorbed, making it a constant process. In the...
One-Compartment Open Model for Extravascular Administration: First-Order Absorption Model
Two-Compartment Open Model: Extravascular Administration
The absorption exponent (ka) indicates the speed at which the drug is...
Physiological Pharmacokinetic Models: Incorporating Hepatic Transporter-Mediated Clearance
A recent model describes pravastatin's hepatobiliary excretion, mediated...

