The influence of diffusion cell type and experimental temperature on machine learning models of skin permeability. (14th November 2019)

• Record Type: Journal Article
• Authors: Ashrafi, Parivash; Sun, Yi; Davey, Neil; Wilkinson, Simon C.; Moss, Gary P.
• Is Part Of: Journal of pharmacy and pharmacology. Volume 72:Number 2(2020)
• Page Start: 197
• Page End: 208
• Publication Date: 2019-11-14
• Subjects: dataset design -- flow‐through diffusion cells -- Franz diffusion cells -- machine learning -- percutaneous absorption; Pharmacy -- Periodicals; Pharmacology -- Periodicals; 615.1
• DOI: 10.1111/jphp.13203
• Languages: English
• ISSNs: 0022-3573

Abstract

Abstract: Objectives: The aim of this study was to use Gaussian process regression (GPR) methods to quantify the effect of experimental temperature ( T exp ) and choice of diffusion cell on model quality and performance. Methods: Data were collated from the literature. Static and flow‐through diffusion cell data were separated, and a series of GPR experiments was conducted. The effect of T exp was assessed by comparing a range of datasets where T exp either remained constant or was varied from 22 to 45 °C. Key findings: Using data from flow‐through diffusion cells results in poor model performance. Data from static diffusion cells resulted in significantly greater performance. Inclusion of data from flow‐through cell experiments reduces overall model quality. Consideration of T exp improves model quality when the dataset used exhibits a wide range of experimental temperatures. Conclusions: This study highlights the problem of collating literature data into datasets from which models are constructed without consideration of the nature of those data. In order to optimise model quality data from only static, Franz‐type, experiments should be used to construct the model and T exp should either be incorporated as a descriptor in the model if data are collated from a range of studies conducted at different temperatures.