Improved Estimation of Human Lipoprotein Kinetics with Mixed Effects Models
Journal article, 2015

Mathematical models may help the analysis of biological systems by providing estimates of otherwise un-measurable quantities such as concentrations and fluxes. The variability in such systems makes it difficult to translate individual characteristics to group behavior. Mixed effects models offer a tool to simultaneously assess individual and population behavior from experimental data. Lipoproteins and plasma lipids are key mediators for cardiovascular disease in metabolic disorders such as diabetes mellitus type 2. By the use of mathematical models and tracer experiments fluxes and production rates of lipoproteins may be estimated. We developed a mixed effects model to study lipoprotein kinetics in a data set of 15 healthy individuals and 15 patients with type 2 diabetes. We compare the traditional and the mixed effects approach in terms of group estimates at various sample and data set sizes. We conclude that the mixed effects approach provided better estimates using the full data set as well as with both sparse and truncated data sets. Sample size estimates showed that to compare lipoprotein secretion the mixed effects approach needed almost half the sample size as the traditional method.

Author

Martin Berglund

University of Gothenburg

Chalmers, Mathematical Sciences, Mathematics

Martin Adiels

Chalmers, Mathematical Sciences, Mathematics

University of Gothenburg

M. R. Taskinen

University of Helsinki

Jan Borén

University of Gothenburg

Bernt Wennberg

University of Gothenburg

Chalmers, Mathematical Sciences, Mathematics

PLoS ONE

1932-6203 (ISSN)

Vol. 10 9 artikel nr e0138538- e0138538

Subject Categories

Mathematics

DOI

10.1371/journal.pone.0138538

More information

Latest update

4/20/2020