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Related Experiment Videos

Self-association of cyclodextrins and cyclodextrin complexes.

Thorsteinn Loftsson1, Már Másson, Marcus E Brewster

  • 1Faculty of Pharmacy, University of Iceland, Hofsvallagata 53, IS-107 Reykjavik, Iceland. thorstlo@hi.is

Journal of Pharmaceutical Sciences
|April 7, 2004
PubMed
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Cyclodextrins improve drug solubility, often assumed to be through inclusion complexes. However, this review highlights non-inclusion mechanisms like surfactant effects and aggregation, offering a broader understanding of cyclodextrin functionality.

Area of Science:

  • Pharmaceutical Sciences
  • Supramolecular Chemistry

Background:

  • Cyclodextrins are widely used pharmaceutical excipients.
  • Their primary function is to improve drug properties, notably poor aqueous solubility.
  • The prevailing theory attributes their efficacy to the formation of noncovalent inclusion complexes with drugs.

Purpose of the Study:

  • To review and assess literature on non-inclusion-based mechanisms of drug solubilization by cyclodextrins.
  • To interpret these mechanisms within a broader theoretical framework of cyclodextrin action.
  • To challenge the universal applicability of the inclusion complex model.

Main Methods:

  • Literature review and assessment of existing studies.
  • Analysis of evidence supporting non-inclusion mechanisms.

Related Experiment Videos

  • Interpretation of findings in the context of cyclodextrin-drug interactions.

    • Main Results:

    • Growing evidence suggests non-inclusion mechanisms contribute significantly to drug solubilization.
    • Surfactant-like effects and molecular aggregation are identified as key non-inclusion pathways.
    • The traditional inclusion complex model may not fully encompass cyclodextrin's solubilizing capabilities.

    Conclusions:

    • Non-inclusion mechanisms play a crucial role in cyclodextrin-mediated drug solubilization.
    • A more comprehensive theory is needed to explain the diverse actions of cyclodextrins.
    • Understanding these alternative mechanisms can lead to improved pharmaceutical formulations.