Spironolactone-Loaded Liposomes Produced Using A Membrane Contactor Method: An Improvement Of The Ethanol Injection Technique
Published 2012 · Chemistry
Spironolactone, a hydrophobic drug, has been encapsulated within liposomes using two different preparation methods: the ethanol injection technique and the membrane contactor. The effects of the technique on the prepared liposomes characteristics have been investigated. For this aim, the spironolactone-loaded liposomes were characterized in terms of size, zeta potential, microscopic morphology, encapsulation efficiency and in vitro release profile. Results indicated a significant influence of the applied preparation method. Indeed, when the membrane contactor method was used, the mean size was smaller (123 nm instead of 200 nm), the encapsulation efficiency was higher (93% instead of 80%), and the release profile showed a better dissolution behaviour which may enhance the preparation availability. In conclusion, these results confirmed that the membrane contactor presents an improvement of the ethanol injection technique allowing a continuous production of liposomes at large scale.