SUSPENSÕES E FORMULAÇÕES TÓPICAS CONTENDO NANOCÁPSULAS E MICROPARTÍCULAS DE CETOCONAZOL: AVALIAÇÃO DA ESTABILIDADE E ATIVIDADE ANTIMICROBIANA

• Autor(a) principal: Pons Júnior, Flábio da Rosa
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional Universidade Franciscana
• Texto Completo: http://tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/261; http://www.tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/348
• topic: Cetoconazol; nanocápsulas; micropartículas; xampu; estabilidade; atividade antimicrobiana; Ketoconazole; nanocapsules; microparticles; shampoo; stability; antimicrobial activity; CNPQ::ENGENHARIAS

The fungal infections in humans occur in several ways, can this is superficial and systemic mycoses mycoses. The use of new antifungal made important progress in the treatment of different types of fungal infections. Among the drugs used to treat, there is ketoconazole, azole derivative, a synthetic molecule that acts by inhibiting biosynthesis of ergosterol molecule, exerting fungicidal. Treatment with ketoconazole requires frequent applications of the product, which causes skin irritation, the adherence to treatment. Initial studies have shown that drugs have nanocarrier improvement in selectivity, reducing side effects by modifying the release and increasing the effectiveness of the asset. This study aimed to characterize, evaluate the physical and chemical stability and antimicrobial activity of systems composed of nanoparticles or microparticles incorporated into formulations containing ketoconazole shampoo. All studies were carried out comparing ketoconazole as nanostructured and microstructured with the free form. The samples were stored under conditions of 25 ± 2 ° C, 4 ± 2 ° C and 40 ± 2 ° C and 75 ± 5% RH and exposed to UV light for 90 days and analyzed at 0, 7, 15, 30, 60 and 90 days in relation to the determination of pH, particle diameter, polydispersity index, zeta potential, rate of association and the drug dosing, antimicrobial activity and viscosity for the samples of shampoo. The average particle size for the nanocapsules was less than 370 nm, for microparticles less than 52 micrometers. All samples consist of the nanocarrier showed negative zeta potential. The values for the rate of association were 92.10% for the nanocapsules and 97.69% for the microparticles. Regarding the content of the suspensions and tested for stability, the samples comprising nanocapsules showed the loss of a smaller amount of assets (17.9% and 19.7%) in conditions of 25 ± 2 ° C and ± 4 2 ° C respectively. For formulations of shampoo made by nanocarrier systems, the same place, but with losses (9.3% and 13.6%) for the same conditions of suspension. In the analysis of antimicrobial activity, suspensions of nanocapsules had power of 98.15% and 100.25% of microparticles. Samples of shampoo were analyzed by microbiological assay sensitivity, which analyzed both qualitatively and showed that the samples have antifungal activity. The validation of analytical methodologies for the suspensions showed satisfactory results for all parameters. The results obtained, it can be concluded that the suspensions have demonstrated good stability, even when incorporated into a topical pharmaceutical vehicle, thus representing a better technological feasibility for the pharmaceutical area.