In vitro schistosomicidal activity of the lignan ( )-6,60-dinitrohinokinin (dnhk) loaded into poly(lactic-co-glycolic acid) nanoparticles against schistosoma mansoni

• Autor(a) principal: Lima, Thaís C.
• Data de Publicação: 2017
• Outros Autores: Lucarini, Rodrigo, Luz, Priscilla P., de Faria, Emerson H., Marçal, Liziane, Magalhães, Lizandra G., Badoco, Fernanda R., Esperandim, Viviane R., Molina, Eduardo F., Laurentz, Rosangela S. [UNESP], Lima, Regiane G. [UNESP], Cunha, Wilson R., Bastos, Jairo K., Andrade Silva, Marcio L.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1080/13880209.2017.1405996; http://hdl.handle.net/11449/221116
• topic: 6, 60-dinitrohinokinin; Biological activity; Nanoparticulate formulation; PLGA; Schistosomicidal

Context: ( )-6,60-Dinitrohinokinin (DNHK) display remarkable antiparasitic activity and was, therefore, incorporated into a nanoparticle formulation. Objective: Incorporation of DNHK in poly lactic-co-glycolic acid (PLGA) nanoparticles aiming to improve its biological activities. Materials and methods: Synthesis, characterization and incorporation of DNHK into glycolic acid (PLGA) nanoparticles by nanoprecipitation method. The nanoparticles were characterized by ultraviolet-visible spectroscopy, X-ray diffraction, field emission electron microscopic scanning mansoni (FESEM), and dynamic light scattering (DLS). For the in vitro test with Schistosoma mansoni, the DNHK-loaded PLGA was diluted into the medium, and added at concentrations 10–200 mM to the culture medium containing one adult worm pair. The parasites were kept for 120 h and monitored every 24 h to evaluate their general condition, including: pairing, alterations in motor activity and mortality. Results: The loaded PLGA nanoparticles gave an encapsulation efficiency of 42.2% and showed spherical characteristics in monodisperse polymeric matrix. The adult worm pairs were separated after 120 h of incubation for concentrations higher than 50 mM of DNHK-loaded PLGA. The groups incubated with 150 and 200 mM of DNHK-loaded PLGA for 24 and 120 h killed 100% of adult worms, afforded LC50 values of 137.0 ± 2.12 mM and 79.01 ± 1.90 mM, respectively, which was similar to the effect displayed by 10 mM of praziquantel. Discussion and conclusions: The incorporation of DNHK-loaded showed schistosomicidal activity and allowed its sustained release. The loaded PLGA system can be administered intravenously, as well as it may be internalized by endocytosis by the target organisms.