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Master's Dissertation
DOI
https://doi.org/10.11606/D.87.2008.tde-12012009-110815
Document
Author
Full name
Lília Macedo Firoozmand
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2008
Supervisor
Committee
Souza, Ana Olívia de (President)
Melo, Itamar Soares de
Pires, Maria de Fatima Costa
Title in Portuguese
Microorganismos do solo e de manguezais: fonte de produtos antimicrobianos.
Keywords in Portuguese
Leishmania
Mycobacterium tuberculosis H37Rv
Trypanosoma cruzi
Ação antimicrobiana
Fungos
Microorganismos
Abstract in Portuguese
A biodiversidade de microrganismos encontrados nos ecossistemas constitui excelentes fontes para a descoberta de moléculas farmacologicamente ativas. Neste estudo, 32 isolados de actinobactérias coletadas do solo e 51 isolados de fungos de manguezais da costa brasileira foram avaliados quanto à ação antifúngica, antimicobacteriana, leishmanicida e tripanossomicida. Extratos orgânicos obtidos a partir do sobrenadante da cultura dos isolados foram testados e cinco apresentaram concentrações inibitórias mínimas iguais ou inferiores a 400 mg/mL sobre fungos patogênicos e dois demonstraram expressiva ação contra a forma tripomastigota de Trypanosoma cruzi. Para a forma promastigota de Leishmania amazonensis e Mycobacterium tuberculosis H37Rv, os extratos não foram efetivos. Os resultados indicam que fungos isolados de manguezais representam boas perspectivas na investigação de novos agentes antimicrobianos.
Title in English
Microorganisms from the soil and from the mangrove swamps: source of antimicrobian products.
Keywords in English
Leishmania
Mycobacterium tuberculosis H37Rv
Trypanosoma cruzi
Antimicrobial action
Fungi
Microorganisms
Abstract in English
The biodiversity of microorganisms found in the ecosystems provide excellent perspectives for the discovery of pharmacologically active molecules. In this study, 32 actinobacteria from the soil and 51 fungi from the mangrove swamps of the Brazilian coast were analyzed with respect to their antifungal, antimycobacterial, leishmanicidal and trypanocidal actions. Organic extracts from the supernatant of the culture of the microorganisms were analyzed and five extracts presented MICs equal or less than 400 mg/mL over the pathogenic fungi and two presented significant action against the trypomastigote of Trypanosoma cruzi. The results indicate that fungi from mangrove swamps present promising perspectives for the research of new antimicrobial agents.
 
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Publishing Date
2009-03-02
 
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