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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

Bioprospecção para compostos antimicobacterianos

Cardoso, Franciano Dias Pereira 18 September 2017 (has links)
A tuberculose representa um sério problema de saúde pública, com alta taxa de incidência, surgimento de formas multirresistentes e difícil tratamento. Torna-se necessário o desenvolvimento de novos compostos e as plantas são fontes destes recursos. O cerrado é possuidor de uma grande biodiversidade e detém potencial em conter espécimes com alguma atividade biológica. Neste estudo objetivou-se a execução de ensaios laboratoriais, a fim de determinar a atividade antimicobacteriana envolvendo dez extratos brutos de plantas presentes neste bioma: Plathymenia reticulata, Ouratea spectabilis, Galactia glaucescens, Apuleia molaris, Dipteryx alata, Brosimum gaudichaudii, Tabebuia caraíba, Pterodon emarginatus, Terminalia fagifolia e Stachytarpheta sp. Os resultados da pesquisa demonstraram que os extratos hidroalcoólicos de O. spectabilis e A. molaris tiveram expressivas concentrações inibitórias para Mycobaterium tuberculosis e demonstraram baixa toxicidade frente as células LLC-MK2 e Vero. O fracionamento dessas duas amostras, relevou uma fração hexânica da A. molaris com significativa ação farmacológica frente a cepas H37Rv, sendo caracterizada como possuidora de compostos promissores para futuros ensaios envolvendo atividade antituberculose. / Tuberculosis represents a serious public health problem, with a high incidence rate, the emergence of multiresistant forms and difficult treatment. It is necessary to develop new compounds and plants are sources of these resources. The Brazilian savanna vegetation has a great biodiversity and holds the potential to contain specimens with some biological activity. The objective of this study was determined the antimycobacterial activity involving ten crude extracts of plants present in this biome: Plathymenia reticulata, Ouratea spectabilis, Galactia glaucescens, Apuleia molaris, Dipteryx alata, Brosimum gaudichaudii, Tabebuia caraíba, Pterodon Emarginatus, Terminalia fagifolia and Stachytarpheta sp. The results of the research demonstrated that the hydroalcoholic extracts of O. spectabilis and A. molaris had significant inhibitory concentrations for Mycobaterium tuberculosis and showed low toxicity against LLC-MK2 and Vero cells. The fractionation of these two samples revealed a hexanic fraction of A. molaris with significant pharmacological action against H37Rv, being characterized as having promising compounds for future trials involving antituberculosis activity.

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