Related Experiment Video
Updated: Dec 19, 2025

Models and Methods to Evaluate Transport of Drug Delivery Systems Across Cellular Barriers
Published on: October 17, 2013
Evaluation of Heat Effects on Transdermal Nicotine Delivery In Vitro and In Silico Using Heat-Enhanced Transport
Terri D La Count1, Qian Zhang1, Michael Murawsky1
1Division of Pharmaceutical Sciences, James L Winkle College of Pharmacy, University of Cincinnati, Cincinnati, Ohio, 45267, USA.
Heating transdermal delivery systems (TDSs) significantly increases nicotine flux across skin. A combined experimental and computational model accurately predicts these heat effects on drug delivery from TDSs.
Area of Science:
- Pharmacology
- Biomedical Engineering
- Materials Science
Background:
- Transdermal drug delivery systems (TDSs) offer controlled drug release.
- Understanding environmental factors like temperature is crucial for TDS efficacy.
- Nicotine is a model drug for studying transdermal transport.
Purpose of the Study:
- To assess heat effects on nicotine delivery from TDSs.
- To develop a combined experimental and computational model for heat transport analysis.
- To evaluate temperature-dependent transport parameters in TDSs.
Main Methods:
- Modified Franz diffusion cell for controlled skin temperature.
- In vitro permeation studies with human cadaver skin.
- Computational heat and mass transport modeling.
- Analysis of nicotine flux under various heat application regimens.
Main Results:
- Increased skin surface temperature (32-42°C) approximately doubled nicotine flux.
- Maximum nicotine flux occurred during initial heat application.
- Computational model accurately predicted nicotine flux under intermittent heating.
- Identified TDS-specific differences and similar temperature effects on transport.
Conclusions:
- Combined experimental and computational modeling effectively evaluates heat effects on TDS drug delivery.
- Temperature significantly enhances nicotine permeation through skin.
- The developed model can predict TDS performance under dynamic thermal conditions.
More Related Videos
10:44Comparing the Effects of Electronic Cigarette Vapor and Cigarette Smoke in a Novel In Vivo Exposure System
Published on: May 24, 2017
09:50Impact Assessment of Repeated Exposure of Organotypic 3D Bronchial and Nasal Tissue Culture Models to Whole Cigarette Smoke
Published on: February 12, 2015
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...
Theories of Dissolution: Diffusion Layer Model
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...
In Vitro Drug Dissolution: Compendial Testing Models II
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,...
Physiological Pharmacokinetic Models: Incorporating Hepatic Transporter-Mediated Clearance
A recent model describes pravastatin's hepatobiliary excretion,...