Conception of nanosized hybrid liposome/poloxamer particles to thicken the interior core of liposomes and delay hydrophilic drug delivery

Publication date: 15 August 2019Source: International Journal of Pharmaceutics, Volume 567Author(s): Shayan Ahmed, Yohann Corvis, Rabah Gahoual, Arlen Euan, Rene Lai-Kuen, Brice Martin Couillaud, Johanne Seguin, Khair Alhareth, Nathalie MignetAbstractLiposomes are nanocarriers composed of phospholipids, especially designed to potentially carry drugs. However, liposomes suffer in terms of leakage of small hydrophilic drugs. To control the release, a system with lipid shell and polymeric viscous core, namely Hybrid liposome/polymer inside (HLPin), has been designed. For this purpose, we setup a syringe pump apparatus equipped with homemade tubing system. HLPin formulation consisting of poloxamer (5% w/v) was found to be optimal when produced at injection rates of 5 mL.min−1. Then, we tend to characterize the HLPin with DLS, TEM, TRPS, thermal analysis and densitometry in comparison with a polymer added after formation of the liposomes. The optimal formulation was evaluated for its stability and cytotoxicity. The selected conditions and composition resulted in nanocarriers which are highly reproducible with mono-disperse size distribution with an average size of 206 ± 4.8 nm and a polydispersity index of 0.15 ± 0.015. Densitometry and thermal analysis results confirmed the formation of HLPin. Interestingly, HLPin were stable over 2 months, produced no cytotoxicity and exhibited slow release of rhodamine and Doxorubicin in comparison to liposome formulation. Our...
Source: International Journal of Pharmaceutics - Category: Drugs & Pharmacology Source Type: research