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A Novel Design of Artificial Membrane for Improving the PAMPA Model

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Abstract

Purpose

Since the first demonstration of PAMPA, the artificial membrane has been traditionally prepared by impregnating a porous filter with a solution of lipid mixture. While the lipid solution-based method is simple and seems to provide good predictability for many compounds, it is challenged by several shortcomings including reproducibility, stability, mass retention and the incorrect prediction of a group of highly permeable compounds including caffeine and antipyrine. Here we present the validation of a novel artificial membrane formed by constructing a lipid/oil/lipid tri-layer in the porous filter.

Methods

Permeability values obtained from traditional and new artificial membrane were compared for their correlation with Caco-2 and human absorption values. Mass retention, stability and organic solvent compatibility of the new artificial membrane were studied.

Results

The new artificial membrane correctly predicts the permeability of the traditionally under-predicted compounds and improves the correlation with Caco-2 and human absorption values. Furthermore, the new artificial membrane reduces the mass retention of compounds that are highly retained by the traditional artificial membrane. The new artificial membrane is also found to be robust enough to sustain long term storage and has good compatibility with organic solvents.

Conclusions

The new artificial membrane provides an improved PAMPA model.

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Authors and Affiliations

  1. BD Biosciences Discovery Labware, 2 Oak Park, Bedford, Massachusetts, 01730, USA

    Xiaoxi Chen, Anthony Murawski & Charles L. Crespi

  2. Bristol-Myers Squibb, Route 206 and Provinceline Rd, Princeton, New Jersey, 08543, USA

    Karishma Patel & Praveen V. Balimane

Authors
  1. Xiaoxi Chen
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  2. Anthony Murawski
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  3. Karishma Patel
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  4. Charles L. Crespi
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  5. Praveen V. Balimane
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Corresponding author

Correspondence to Xiaoxi Chen.

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Chen, X., Murawski, A., Patel, K. et al. A Novel Design of Artificial Membrane for Improving the PAMPA Model. Pharm Res 25, 1511–1520 (2008). https://doi.org/10.1007/s11095-007-9517-8

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  • DOI: https://doi.org/10.1007/s11095-007-9517-8

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