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An Evaluation of a Fluorometric Method for Determining Binding Parameters of Drug–Carrier Complexes Using Mathematical Models Based on Total Drug Concentration

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Abstract

A fluorescence method for determining the mode of binding and estimating binding parameters in a model drug-carrier complex was developed using the lipopeptide antibiotic daptomycin and polyamidoamine (PAMAM) dendrimer. Mathematical simulations of model equations describing fluorescence changes induced by antibiotic–carrier binding in terms of total drug concentration were used to evaluate the sensitivity of parameter variation on binding isotherms for both one- and two-site binding models. Nonlinear regression analysis was used to estimate binding parameters and to identify pH-dependent binding models.

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Authors and Affiliations

  1. Faculty of Pharmaceutical Science, Chulalongkorn University, Bangkok, Thailand

    Boontarika Chanvorachote, Ubonthip Nimmannit & Walaisiri Muangsiri

  2. Division of Pharmaceutics, College of Pharmacy, The University of Iowa, Iowa City, IA, 52242, USA

    Lee Kirsch

Authors
  1. Boontarika Chanvorachote
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  2. Ubonthip Nimmannit
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  3. Walaisiri Muangsiri
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  4. Lee Kirsch
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Correspondence to Lee Kirsch.

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Chanvorachote, B., Nimmannit, U., Muangsiri, W. et al. An Evaluation of a Fluorometric Method for Determining Binding Parameters of Drug–Carrier Complexes Using Mathematical Models Based on Total Drug Concentration. J Fluoresc 19, 747–753 (2009). https://doi.org/10.1007/s10895-009-0471-1

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  • DOI: https://doi.org/10.1007/s10895-009-0471-1

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