Journal
INTERNATIONAL JOURNAL OF PHARMACEUTICS
Volume 392, Issue 1-2, Pages 285-293Publisher
ELSEVIER
DOI: 10.1016/j.ijpharm.2010.03.061
Keywords
Liposomes; Silica nanoparticles; Insulin release; Encapsulation; Lipolysis
Categories
Ask authors/readers for more resources
A hybrid silica-liposome nanocapsule system containing insulin has been developed and the encapsulation, protection and release properties are evaluated. The formulation strategy is based on using insulin-loaded 1,2-dipalmitoyl-sn-glycero-3-phosphocholine and cholesterol liposomes as a template for the deposition of inert silica nanoparticles. The influence of formulation and process variables on particle size, zeta potential and liposome entrapment of insulin is reported. The ability to protect against lipolytic degradation and sustain insulin release in vitro in simulated Cl conditions is also reported. Depending on the concentration and charge ratio of liposomes and silica nanoparticles, nanoparticle coated liposomes with varied size and zeta potential were obtained with an insulin entrapment efficiency of 70%. The silica nanoparticle coating protected liposomes against degradation by digestive enzymes in vitro; the release rate of insulin from silica coated liposomes was reduced in comparison to uncoated liposomes. Thus the liposomal release kinetics and stability can be controlled by including a specifically engineered nanopartide layer. Silica nanoparticle-liposomes hybrid nanocapsules show promise as a delivery vehicle for proteins and peptides. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available