Abstract
The (−)−hinokinin display high activity against Trypanosoma cruzi in vitro and in vivo. (−)−Hinokinin-loaded poly(d,l-lactide-co-glycolide) microparticles were prepared and characterized in order to protect (−)−hinokinin of biological interactions and promote its sustained release for treatment of Chagas disease. The microparticles contain (−)−hinokinin were prepared by the classical method of the emulsion/solvent evaporation. The scanning electron microscopy, light-scattering analyzer were used to study the morphology and particle size, respectively. The encapsulation efficiency was determined, drug release studies were kinetically evaluated, and the trypanocidal effect was evaluated in vivo. (−)−Hinokinin-loaded microparticles obtained showed a mean diameter of 0.862 µm with smooth surface and spherical shape. The encapsulation efficiency was 72.46 ± 2.92% and developed system maintained drug release with Higuchi kinetics. The preparation method showed to be suitable, since the morphological characteristics, encapsulation efficiency, and in vitro release profile were satisfactory. In vivo assays showed significant reduction of mice parasitaemia after administration of (−)−hinokinin-loaded microparticles. Thus, the developed microparticles seem to be a promising system for sustained release of (−)−hinokinin for treatment of Chagas disease.
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The authors would like to thank “Centro Nacional de Desenvolvimento Científico e Tecnológico” (Cnpq, Brazil) and ‘‘Fundação de Amparo à Pesquisa do Estado de São Paulo’’ (FAPESP, Brazil) for financial support.
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Saraiva, J., Lira, A.A.M., Esperandim, V.R. et al. (−)−Hinokinin-loaded poly(d,l-lactide-co-glycolide) microparticles for Chagas disease. Parasitol Res 106, 703–708 (2010). https://doi.org/10.1007/s00436-010-1725-1
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DOI: https://doi.org/10.1007/s00436-010-1725-1