alexa Characterisation of surface-modified solid lipid nanoparticles (SLN): influence of lecithin and nonionic emulsifier.
Materials Science

Materials Science

Journal of Nanomedicine & Nanotechnology

Author(s): Schubert MA, MllerGoymann CC

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Abstract Solid lipid nanoparticles (SLN), an alternative colloidal drug delivery system to polymer nanoparticles, emulsions and liposomes, are generally produced by high pressure melt-emulsification. However, the harsh production process is not applicable for formulations containing shear and temperature sensitive compounds. For that reason, subsequent adsorptive SLN loading might be a promising alternative. The aim of the present study was the development and characterisation of surface-modified SLN for adsorptive protein loading by variation of both the lipid matrix and the emulsifier concentration in the continuous phase. Variations in SLN composition resulted in particle sizes between 674 and 61 nm corresponding to specific surfaces of 4.5 m(2)/g and 48.9 m(2)/g and zeta potentials between -23.4 mV and -0.9 mV. In dependence of SLN surface properties, albumin payload ranged from 2.5 to 15\%. Thermoanalysis, X-ray diffraction and electron microscopy revealed anisometrical and crystalline particles. In vitro cytotoxicity was low in terms of both haemolysis, which was between 1 and 2\%, and neutral red test (NRT) showing a half lethal dose between 1.1 and 4.6\%. This article was published in Eur J Pharm Biopharm and referenced in Journal of Nanomedicine & Nanotechnology

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