Nanoparticle-coated organic-inorganic microparticles: experimental design and gastrointestinal tolerance evaluation

AUTOR(ES)

Beck, Ruy Carlos R., Haas, Sandra Elisa, Guterres, Silvia Stanisçuaski, Ré, Maria Inês, Benvenutti, Edilson V., Pohlmann, Adriana Raffin

FONTE

Química Nova

DATA DE PUBLICAÇÃO

2006-10

RESUMO

The influences of the spray-drying parameters and the type of nanoparticles (nanocapsules or nanospheres) on the characteristics of nanoparticle-coated diclofenac-loaded microparticles were investigated by using a factorial design 3². Gastrointestinal tolerance following oral administration in rats was evaluated. Formulations were selected considering the best yields, the best encapsulation efficiencies and the lowest water contents, presenting surfaces completely coated by nanostructures and a decrease in the surface areas in relation to the uncoated core. In vitro drug release demonstrated the influence of the nanoparticle-coating on the dissolution profiles of diclofenac. Nanocapsule-coated microparticles presented a protective effect on the gastrointestinal mucosa.

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