|Title||Hydrophobically modified chitosan nanoliposomes for intestinal drug delivery|
|Authors||Zariwala, M., Bendre, H., Markiv, A., Farnaud, S., Renshaw, D., Taylor, K.M.G. and Somavarapu, S.|
Background: Encapsulation of hydrophilic drugs within liposomes can be challenging.
Methods: A novel chitosan derivative, O-palmitoyl chitosan (OPC) was synthesized from chitosan and palmitoyl chloride using methane-sulfonic acid as a solvent. The success of synthesis was confirmed by Fourier transform infra-red (FT-IR) spectroscopy and proton NMR spectroscopy (H-NMR). Liposomes encapsulating ferrous sulphate as a model hydrophilic drug for intestinal delivery were prepared with or without OPC inclusion (Lipo-Fe and OPC-Lipo-Fe).
Results: Entrapment of iron was significantly higher in OPC containing liposomes compared to controls. Quantitative iron absorption from the OPC liposomes was significantly higher (1.5-fold P<0.05) than free ferrous sulphate controls. Qualitative uptake analysis by confocal imaging using coumarin-6 dye loaded liposomes also indicated higher cellular uptake and internalization of the OPC-containing liposomes.
Conclusion: These findings suggest that addition of OPC during liposome preparation creates robust vesicles that have improved mucoadhesive and absorption enhancing properties. The chitosan derivative OPC therefore provides a novel alternative for formulation of delivery vehicles targeting intestinal absorption.
|Keywords||gut delivery, intestinal absorption, Caco-2, ferrous sulfate|
|Journal||International Journal of Nanomedicine|
|Journal citation||2018:13, pp. 5837-5848|
|Publisher||Dove Medical Press Ltd.|
|Digital Object Identifier (DOI)||doi:10.2147/IJN.S166901|
|Published||27 Sep 2018|
|License||CC BY-NC 3.0 |