Desenvolvimento de sistemas nanoestruturados estabilizados com álcool cetilico etoxilado e propoxilado contendo fluconazol potencialmente ativo contra esporotricose
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Data
2007-07-25
Autores
Klein, Traudi [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
A introdução de novos fármacos na terapêutica tem se tornado um processo muito oneroso. Para contornar estes altos custos pode-se recorrer à estratégia de desenvolvimento de sistemas nanoestruturados para liberação dos fármacos que permitem o aumento da eficiência de fármacos utilizados na terapêutica atual, a reintrodução de outros anteriormente descartados por suas propriedades indesejáveis e o aprimoramento de novos fármacos antes que sejam utilizados na terapêutica. A esporotricose é uma micose subcutânea causada pelo fungo Sporothrix schenckii. Há poucos casos de tratamento da esporotricose com fluconazol porque ele é menos efetivo e apenas é recomendado quando o itraconazol não é tolerado, o que é uma controvérsia, já que este fármaco foi desenvolvido como um promissor antifúngico de amplo espectro de ação e ótimo perfil de segurança, além de causar poucas reações adversas ao paciente. Portanto, torna-se interessante buscar novas alternativas tecnológicas para o uso do fluconazol no tratamento da esporotricose que aumentem a eficiência deste fármaco na terapia antifúngica. O objetivo deste trabalho foi desenvolver e caracterizar sistemas nanoestruturados constituídos de ácido oléico, álcool cetílico etoxilado 20OE e propoxilado 5OP e água contendo fluconazol potencialmente ativo contra esporotricose. Inicialmente foi construído um diagrama ternário do sistema e as formulações de interesse foram caracterizadas por índice de refração, condutividade eletrolítica, reologia, SAXS e microscopia de luz polarizada. A solubilidade do fluconazol nos constituintes do sistema e nas formulações de interesse foi analisada. Para avaliar o mecanismo de absorção intestinal do fármaco a partir das formulações utilizamos o modelo do saco intestinal invertido. Também realizamos...
The introduction of new drugs in the therapy has become a very onerous process. To skirt these high costs may be appealed to the strategy of development of nanoestructured drug delivery systems that allow the increase of the efficiency of drugs used in the therapy, the reintroduction of previously discarded others for its undesirable properties and the improvement of new drugs before they are used in the therapy. Sporotricosis is a subcutaneous mycose caused by the fungus Sporothrix schenckii. There are few cases of sporotricosis treatment with fluconazole because it is less effective and he is just recommended when itraconazole is not tolerated. This is a controversy, since this drug was developed as a promising antifungal of large spectrum of action and excellent profile of security, causing few adverse reactions to the patient. Therefore, it is very interesting to search new technological alternatives for the fluconazole use in the treatment of sporotricosis, increasing the efficiency of this drug in the therapy. The aim of this work was to develop and characterize nanoestructured systems consisting of oleic acid, 20OE etoxiled and 5OP propoxiled cetilic alcohol and water for the incorporation of fluconazole and oral administration for treatment of sporotrichosis. To develop the formulations, a ternary diagram of the system was constructed and the interest formulations were characterized as refractive index, electrolytic conductivity, rheology, SAXS and polarized light microscopy. The solubility of fluconazole in each constituent of the system and in the formulations of interest was analyzed. To evaluate the mechanism of intestinal absorption of the drug from the pharmaceutical dosage form we use the model of the inverted small intestine. The influence of biliary salts in the structure of the system was also evaluate. The direct mixture... (Complete abstract click electronic access below)
The introduction of new drugs in the therapy has become a very onerous process. To skirt these high costs may be appealed to the strategy of development of nanoestructured drug delivery systems that allow the increase of the efficiency of drugs used in the therapy, the reintroduction of previously discarded others for its undesirable properties and the improvement of new drugs before they are used in the therapy. Sporotricosis is a subcutaneous mycose caused by the fungus Sporothrix schenckii. There are few cases of sporotricosis treatment with fluconazole because it is less effective and he is just recommended when itraconazole is not tolerated. This is a controversy, since this drug was developed as a promising antifungal of large spectrum of action and excellent profile of security, causing few adverse reactions to the patient. Therefore, it is very interesting to search new technological alternatives for the fluconazole use in the treatment of sporotricosis, increasing the efficiency of this drug in the therapy. The aim of this work was to develop and characterize nanoestructured systems consisting of oleic acid, 20OE etoxiled and 5OP propoxiled cetilic alcohol and water for the incorporation of fluconazole and oral administration for treatment of sporotrichosis. To develop the formulations, a ternary diagram of the system was constructed and the interest formulations were characterized as refractive index, electrolytic conductivity, rheology, SAXS and polarized light microscopy. The solubility of fluconazole in each constituent of the system and in the formulations of interest was analyzed. To evaluate the mechanism of intestinal absorption of the drug from the pharmaceutical dosage form we use the model of the inverted small intestine. The influence of biliary salts in the structure of the system was also evaluate. The direct mixture... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Microemulsão, Esporotricose, Reologia, Fluconazol
Como citar
KLEIN, Traudi. Desenvolvimento de sistemas nanoestruturados estabilizados com álcool cetilico etoxilado e propoxilado contendo fluconazol potencialmente ativo contra esporotricose. 2007. 114 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Ciências Farmacêuticas, 2007.