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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Desenvolvimento e caracterização de nanopartículas poliméricas contendo itraconazol / Development and characterization of polymeric nanoparticles itraconazole

Lucena, Percília de Andradea 19 March 2014 (has links)
Submitted by Marlene Santos (marlene.bc.ufg@gmail.com) on 2014-12-16T19:58:48Z No. of bitstreams: 2 Dissertação - Percília de Andrade Lucena - 2014.pdf: 1506404 bytes, checksum: c895c029b3a1ac62acf42cd19fad7214 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2014-12-22T10:32:36Z (GMT) No. of bitstreams: 2 Dissertação - Percília de Andrade Lucena - 2014.pdf: 1506404 bytes, checksum: c895c029b3a1ac62acf42cd19fad7214 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Made available in DSpace on 2014-12-22T10:32:36Z (GMT). No. of bitstreams: 2 Dissertação - Percília de Andrade Lucena - 2014.pdf: 1506404 bytes, checksum: c895c029b3a1ac62acf42cd19fad7214 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2014-03-19 / Polymeric nanoparticles have been used as carriers of drugs that are able to increase the efficacy of many active ingredients. Among the nanocarriers include nanocapsules (NCs), which are vesicular structures containing oil inside surrounded by a polymer wall and nanospheres (NSs) that are impregnated with polymer matrices drug throughout its surface. These structures have many applications such as optimizing drug delivery and reducing the toxic potential of drugs. Itraconazole family of a drug Azole has a broad spectrum of action against fungi and has appropriate pharmacokinetic characteristics for a drug. Thus, this study aims to develope and characterize nanostructured systems containing Itraconazole. Polymeric nanoparticles were obtained by the nanoprecipitation technique, lyophilized, characterized, and evaluated physical-chemically incorporated into mucoadhesive topical formulation. Nanocapsules containing Itraconazole showed encapsulation efficiency rate of 99 ± 6.9%, a mean diameter of 190 ± 10.1 nm, PDI 0.1 ± 0:06 and zeta potential -15 ± 2.5 mV. The nanospheres exhibited rate of encapsulation efficiency of 97 ± 2.8%, mean diameter 120 ± 0.8 nm, 0.1 ± 0.01 PDI and zeta potential -10 ± 3.5 mV. Lyophilization was carried out with 10% trehalose + 10% sucrose, achieving satisfactory results. The drug release after 30 days at 37 °C was 99% for the NCs and 92% for the NEs. The mucoadhesive topical formulation has in its composition 60% Poloxamer 188, 20% polyethylene glycol 400 and 5mg nanostructured itraconazole were incorporated homogeneously. The results indicate that the formulation of Itraconazole in polymeric nanoparticles has potential for in vivo use in the topical treatment of fungal infections. / Nanopartículas poliméricas têm sido utilizadas como carreadores de fármacos capazes de aumentar a eficácia de muitos insumos ativos. Dentre os nanocarreadores, destacam-se: nanocápsulas (NCs), que são estruturas vesiculares, contendo óleo no interior, circundadas por uma parede polimérica e nanoesferas (NEs) que são matrizes poliméricas impregnadas com fármaco por toda sua superfície. Essas estruturas possuem diversas aplicações como otimizar a entrega de fármacos e reduzir o potencial tóxico. O Itraconazol um fármaco da família dos azóis possui um amplo espectro de ação contra fungos e apresenta características farmacocinéticas apropriadas para um fármaco. Sendo assim, o presente trabalho tem como objetivo desenvolver e caracterizar sistemas nanoestruturados contendo Itraconazol. As nanopartículas poliméricas foram obtidas através da técnica da nanoprecipitação, liofilizadas, caracterizadas, avaliadas físicoquimicamente e incorporadas em formulação tópica mucoadesiva. As nanocápsulas contendo Itraconazol apresentaram taxa de eficiência de encapsulação de 99±6.9%, diâmetro médio de 190±10.1 nm, PDI 0.1±0.06 e potencial zeta -15±2.5 mV. As nanoesferas exibiram taxa de eficiência de encapsulação de 97±2.8%, diâmetro médio de 120±0.8 nm, PDI 0.1±0.01 e potencial zeta -10±3.5 mV. A liofilização foi realizada com 10% de trealose + 10% de sacarose, alcançando resultados satisfatórios. A liberação do fármaco após 30 dias a 37°C foi de 99% para as NCs e 92% para as NEs. A formulação tópica mucoadesiva possui em sua composição 60% Poloxamer 188 e 20% de Polietilenoglicol 400 e 5mg de itraconazol nanoestruturado foram incorporados homogeneamente. Os resultados indicam que a formulação de itraconazol em nanopartículas poliméricas apresenta potencial para utilização in vivo no tratamento tópico de infecções fúngicas.

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