title: Interaction of Amphotericin B with cholesteryl palmityl carbonate ester.
abstract: A cholesteryl carbonate ester was prepared and evaluated as a possible thermotropic liquid crystal excipient for dry powder inhalers. Cholesteryl palmityl carbonate (CPC) was synthesized, and the phase behavior was characterized by differential scanning calorimetry, transmission electron microscopy, polarized light microscope, small angle X-ray diffraction, and solid-state nuclear magnetic resonance spectroscopy. Amphotericin B (AmB) was incorporated into CPC at various mole% (7.7, 14.3, 25, 33.3, and 50) using a solvent evaporation method. The amount of AmB loaded into liquid crystal was limited. The mixture of AmB in liquid crystal did not produce a new complex; rather, the addition of AmB affected the orientational order and the motional aspects of liquid crystal molecules.
authors.affiliation: Department of Pharmaceutical Technology and Drug Delivery System Excellence Center, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat Yai Songkla 90112, Thailand.
authors.forename: Rabkwan
authors.initials: R
authors.lastname: Chuealee
authors.forename: Timothy S
authors.initials: TS
authors.lastname: Wiedmann
authors.forename: Roongnapa
authors.initials: R
authors.lastname: Suedee
authors.forename: Teerapol
authors.initials: T
authors.lastname: Srichana
mesh_terms: D000666:Amphotericin B / Q000008:administration & dosage* / Q000737:chemistry; D000935:Antifungal Agents / Q000008:administration & dosage* / Q000737:chemistry; D002152:Calorimetry, Differential Scanning; D002788:Cholesterol Esters / Q000737:chemistry*; D003460:Crystallization; D016503:Drug Delivery Systems; D058995:Dry Powder Inhalers; D050866:Liquid Crystals / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D044367:Phase Transition; D053838:Scattering, Small Angle; D014961:X-Ray Diffraction
chemical_list: D000935:Antifungal Agents; D002788:Cholesterol Esters; D000666:Amphotericin B