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• W3000353840 abstract "O objetivo do presente estudo foi identificar a composição química da Senna spectabilis, averiguar o potencial antimicrobiano in vitro e analisar seu efeito modulador da atividade antibiótica. Os ensaios fitoquímicos foram realizados seguindo o método proposto por Matos (1997), baseando-se na observação visual de alteração de cor ou formação de precipitado após a adição dos reagentes específicos. Os testes de Concentração Inibitória Mínima (CIM) e modulação foram determinados pelo ensaio de microdiluição em caldo, seguindo as recomendações do Clinical and Laboratory Standards Institute (CLSI). As cepas utilizadas foram Saphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa e Salmonella entérica. Após essas análises se verificou a presença significativa dos metabólitos secundários taninos condensados, alcaloides, esteroides e saponinas. Nos resultados referentes à avaliação da ação antimicrobiana do extrato de S. spectabilis contra as cepas testadas se observou que houve crescimento bacteriano em todas as concentrações aplicadas, não apresentando assim nenhuma CIM clinicamente relevante. Na modulação, o extrato em combinação com os antibióticos testados mostrou efeito sinérgico contra a maioria das bactérias testadas, potencializando o efeito dos antibióticos utilizados. Portanto, este estudo abre caminho para futuras pesquisas que auxiliem a identificar na S. spectabilis, moléculas que atuem sinergicamente a antibióticos, tornando-se uma alternativa como adjuvante de antimicrobianos e no combate a infecções bacterianas resistentes às diversas drogas. Palavras-chave: Atividade Antibacteriana. Senna spectabilis. Fitoquímica. Sinergismo. AbstractThe objective of the present study was to identify the chemical composition of Senna spectabilis, to investigate the in vitro antimicrobial potential and to analyze its modulating effect of antibiotic activity. Phytochemical assays were performed following the method proposed by Matos (1997), based on visual observation of color change or precipitate formation after the addition of specific reagents. The Minimum Inhibitory Concentration (MIC) and modulation tests were determined by the broth microdilution assay, following the recommendations of the Clinical and Laboratory Standards Institute (CLSI). The strains used were Saphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Salmonella enterica. After these analyzes, it was verified the significant presence of the secondary condensed tannin metabolites, alkaloids, steroids and saponins. In the results regarding the evaluation of the antimicrobial action of S. spectabilis extract against the tested strains it was observed that there was bacterial growth in all the applied concentrations, thus presenting no clinically relevant MIC. In modulation, the extract in combination with the tested antibiotics showed synergistic effect against most of the tested bacteria, enhancing the effect of the antibiotics used. Therefore, this study paves the way for future research to help identify S. spectabilis molecules that act synergistically to antibiotics, becoming an alternative as an adjunct to antimicrobials and in the fight against bacterial infections resistant to various drugs. Keywords: Antibacterial Activity. Senna spectabilis. Phytochemistry. Synergism." @default.
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• W3000353840 date "2019-12-18" @default.
• W3000353840 modified "2023-10-17" @default.
• W3000353840 title "Prospecção Fitoquímica e Análise da Atividade Antimicrobiana e Moduladora in Vitro do Extrato Hidroalcoólico das Folhas de Senna spectabilis" @default.
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• W3000353840 doi "https://doi.org/10.17921/1415-6938.2019v23n3p262-267" @default.
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