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  • Title: Aggregation of amphotericin B in the presence of gamma-cyclodextrin.
    Author: Kajtár M, Vikmon M, Morlin E, Szejtli J.
    Journal: Biopolymers; 1989 Sep; 28(9):1585-96. PubMed ID: 2775849.
    Abstract:
    The macrolide antibiotic amphotericin B (AmB) forms an inclusion complex with gamma-cyclodextrin (gamma-CDx), resulting in a molecularly dispersed state of the drug. The state of aggregation of AmB in different solvents has been studied by absorption (uv-vis) and CD spectroscopy. While in aqueous solutions AmB forms colloid-like multimolecular aggregates, in the presence of gamma-CDx true solutions can be prepared, which show similar spectral properties as AmB dissolved in organic solvents. The AmB-gamma-CDx complex can be isolated as an amorphous, stable, water-soluble powder, indicating that gamma-CDx is a good carrier for the solubilization of this antibiotic. Using gamma-CDx as a carrier, the danger of precipitation of the drug during parenteral or intravenous administration can be largely reduced.
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