Amphotericin B microparticles 'AmbiShell' from phospholipid and gelatin: Development and investigation by combined DLS and SANS resolves the core-shell structure

作者：Johnson Raphael; Nawroth Thomas^*; Khoshakhlagh Pooneh; Langguth Peter; Schmueser Lars; Hellmann Nadja; Decker Heinz; Szekely Noemi Kinga

来源：European Journal of Lipid Science and Technology, 2014, 116(9): 1167-1173.

DOI：10.1002/ejlt.201400069

• Amphotericin B
• DLS
• Gelatin
• Lecithin
• SANS

A novel homogenous core-shell formulation 'AmbiShell' of the hydrophobic antifungal polyene drug Amphotericin B was prepared from the pure drug, lecithin, and gelatin. The established 'Hydrophilic Solubilisation Technology' (HST) was used for embedding the lipophilic drug with lecithin and gelatin, yielding core-shell microparticles of 1 mm size. The particle size of the drug, the formulation, and the thickness of the coating were investigated by using dynamic light scattering (DLS), microscopy, UV-Visible spectroscopy and small angle neutron scattering (SANS). The drug in the formulation was not in the oligomer form but in a competent uptake form, as shown by the UV-Visible spectroscopy. The DLS and microscopy depicted the product to consist of spheres (similar to 1 mu m). The SANS experiment using deuterium contrast matching of the drug cores revealed a thin layer span of 5.6 nm, which is similar, but slightly larger as compared to the biological lipid membranes. The finding offers opportunities for further improvements of the formulation, e.g., by surface modification.

• 出版日期2014-9