IMR Press / FBE / Volume 2 / Issue 2 / DOI: 10.2741/E100

Frontiers in Bioscience-Elite (FBE) is published by IMR Press from Volume 13 Issue 2 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on as a courtesy and upon agreement with Frontiers in Bioscience.

A synergism model for PPARalpha and PXR agonist effects on HDL-cholesterol and apoA1
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1 Department of Mathematics, 2801 W. Bancroft St., The University of Toledo, Toledo, OH 43606-3390
2 Department of Pharmacology, 2801 W. Bancroft St., The University of Toledo, Toledo, OH 43606-3390
3 CeutiCare, LLC, 300 Madison Ave, Suite 270, Toledo, Ohio 43604

*Author to whom correspondence should be addressed.


Front. Biosci. (Elite Ed) 2010, 2(2), 399–410;
Published: 1 January 2010

Synergism between gemfibrozil and CDD 3540, drugs used to elevate mouse serum HDL cholesterol and apoprotein A1, is modeled using nonlinear response surface techniques. This approach employs a common simple pharmacological model to describe the dose-response function. Its parameters are modeled as functions of drug mixture fractions using models borrowed from mixture experiment analysis methods. This study advances previous in vitro synergy studies in three key areas. First, it was in vivo, with the associated additional variability. Second, the sample size was much smaller than in previous studies. Finally, this was the first specially designed study with this type of statistical analysis in mind. The design consisted of replicated observations along each of five rays at combination amounts chosen employing the principles of D-optimality. Also, the observed in vivo synergism of the combined use of these drugs, elevated levels of HDL-C and apoA1, and the experimental results and statistical models may provide important clues regarding the biological mechanisms of action of the two compounds.

high density lipoproteins
apoprotein A1
nonlinear response surface
mixture experiment
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