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New Insights of Turmeric Extract-Loaded PLGA Nanoparticles: Development,Characterization and In Vitro Evaluation of Antioxidant Activity
Authors:Gonzales  Camila Maria  Dalmolin  Luciana Facco  da Silva  Kátia Aparecida  Slade  Natália Bueno Leite  Lopez  Renata Fonseca Vianna  Moreto  Jeferson Aparecido  Schwarz  Kélin
Institution:1.Department of Nutrition, Federal University of Triangulo Mineiro, Rua Vigário Carlos, Uberaba, Minas Gerais, 38025-350, Brazil
;2.School of Pharmaceutical Sciences of Ribeir?o Preto, University of S?o Paulo, Avenida do Café, s/n,, Ribeir?o Preto, S?o Paulo, 14040-900, Brazil
;3.Institute of Exact and Natural Sciences and Education, Federal University of Triangulo Mineiro, Avenida Doutor Randolfo Borges Júnior, Uberaba, Minas Gerais, 38064-200, Brazil
;
Abstract:

Here, we presented new insights of the development of poly(lactic-co-glycolic acid) nanoparticles containing turmeric compounds (turmeric-PLGA-NPs) using emulsion-solvent evaporation method. The nanoparticulate system was characterized by size, zeta potential, morphology, release profile, partition parameter, stability and encapsulation efficiency (%EE). Antioxidant activity studies were also evaluated. The Korsmeyer-Peppas model (Mt/M vs. t) was used to determine the release mechanisms of the studied system. Our results demonstrated the emulsion-solvent evaporation method was shown advantageous for producing turmeric-PLGA-NPs in the range of 145 nm with high homogeneity in size distribution, zeta potential of ?21.8 mV and %EE about 72%. Nanoparticles were stable over a period of one month. In vitro study showed a release of curcumin governed by diffusion and relaxation of the polymeric matrix. The partition parameter of the extract in relation to blank-PLGA-NPs was 0.111?±?0.008 M?1, indicating a low affinity of curcumin for the polymer matrix. Antioxidant ability of the turmeric-PLGA-NPs in scavenging the radical 2,2-azinobis (3-ethylbenzothiazoline- 6-sulfonic acid) (ABTS) was inferior to free turmeric extract and showed a concentration and time-dependent profile. The study concluded that PLGA nanoparticles are potential carriers for turmeric extract delivery.

Keywords:
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