Title
PLGA nanoparticles loaded with the antileishmanial saponin <tex>$\beta$</tex>-aescin : factor influence study and in vitro efficacy evaluation PLGA nanoparticles loaded with the antileishmanial saponin <tex>$\beta$</tex>-aescin : factor influence study and in vitro efficacy evaluation
Author
Faculty/Department
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences. Pharmacy
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences . Biomedical Sciences
Publication type
article
Publication
Amsterdam ,
Subject
Biology
Pharmacology. Therapy
Source (journal)
International journal of pharmaceutics. - Amsterdam
Volume/pages
420(2011) :1 , p. 122-132
ISSN
0378-5173
ISI
000296991500016
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Colloidal carriers are known to improve the therapeutic index of the conventional drugs in the treatment of visceral leishmaniasis (VL) by decreasing their toxicity whilst maintaining or increasing therapeutic efficacy. This paper describes the development of poly(d,l-lactide-co-glycolide) (PLGA) nanoparticles (NPs) for the antileishmanial saponin β-aescin. NPs were prepared by the W/O/W emulsification solvent evaporation technique and the influence of five preparation parameters on the NPs size (Zave), zeta potential and entrapment efficiency (EE%) was investigated using a 25−2 fractional factorial design. Cytotoxicity of aescin, aescin-loaded and blank PLGA NPs was evaluated in J774 macrophages and non-phagocytic MRC-5 cells, whereas antileishmanial activity was determined in the Leishmania infantum ex vivo model. The developed PLGA NPs were monodispersed with Zave < 500 nm and exhibited negative zeta potentials. The process variables surfactant primary emulsion, concentration aescin and solvent evaporation rate had a positive effect on EE%. Addition of Tween® 80 to the inner aqueous phase rendered the primary emulsion more stable, which in its turn led to better saponin entrapment. The selectivity index (SI) towards the supporting host macrophages increased from 4 to 18 by treating the cells with aescin-loaded NPs instead of free β-aescin. In conclusion, the in vitro results confirmed our hypothesis.
E-info
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