RESUMO
Abstract Diethylcarbamazine-loaded nanoparticles were previously evaluated for their anti-inflammatory activity. However, little is known regarding their physicochemical properties. Thus, the purpose of this study was to physiochemically characterize diethylcarbamazine-loaded poly(caprolactone) nanoparticles and evaluate their in vitro cytotoxicity. All formulations were prepared using the double-emulsion method. The average particle size was in the ranged between 298 and 364 nm and the polydispersity indexes were below 0.3. The zeta potential values were marginally negative, which may be related to drug loading, as higher loading led to an increase in the modulus of the zeta potential values. Fourier transform infrared spectroscopy (FT-IR) and X-ray powder diffraction (XRD) analysis did not reveal any chemical interactions between the chemicals used and the absence of drug in crystalline form on the nanoparticle surfaces. The in vitro drug release study revealed a concentration-dependent release from the nanoparticles into the medium. The in vitro cytotoxicity assay demonstrated the biocompatibility of the blank and loaded nanoparticles. Hence, all formulations presented good physicochemical and safety properties, corroborating the in vivo anti-inflammatory activity, previously reported by our group.
Assuntos
Preparações Farmacêuticas/análise , Dietilcarbamazina/agonistas , Liberação Controlada de Fármacos , Métodos , Anti-Inflamatórios/classificação , Técnicas In Vitro/métodos , Espectroscopia de Infravermelho com Transformada de Fourier , Compostos Químicos , Nanopartículas/análiseRESUMO
This work correlated the presence of oral streptococci in dental biofilm with clinical indexes of caries and oral hygiene in caries-active and caries-free children. S. mutans and/or S. sobrinus in the dental biofilm does not indicate a direct risk for developing dental caries.
Este trabalho correlacionou a presença de estreptococos orais no biofilme dental com índices clínicos de cárie dentária e higiene oral em crianças com alta e baixa atividade de cárie. S. mutans e/ou S. sobrinus no biofilme dental não significa o imediato desenvolvimento de lesões cariosas