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Antibacterial evaluation of Styrax pohlii and isolated compounds
Bertanha, Camila Spereta; Utrera, Susane Hellen; Gimenez, Valéria Maria Melleiro; Groppo, Milton; Silva, Márcio Luis Andrade e; Cunha, Wilson Roberto; Martins, Carlos Henrique Gomes; Januário, Ana Helena; Pauletti, Patrícia Mendonça.
  • Bertanha, Camila Spereta; University of Franca. Center for Research in Exact and Technological Sciences.
  • Utrera, Susane Hellen; University of Franca. Center for Research in Exact and Technological Sciences.
  • Gimenez, Valéria Maria Melleiro; University of Franca. Center for Research in Exact and Technological Sciences.
  • Groppo, Milton; University of Franca. Center for Research in Exact and Technological Sciences.
  • Silva, Márcio Luis Andrade e; University of Franca. Center for Research in Exact and Technological Sciences.
  • Cunha, Wilson Roberto; University of Franca. Center for Research in Exact and Technological Sciences.
  • Martins, Carlos Henrique Gomes; University of Franca. Center for Research in Exact and Technological Sciences.
  • Januário, Ana Helena; University of Franca. Center for Research in Exact and Technological Sciences.
  • Pauletti, Patrícia Mendonça; University of Franca. Center for Research in Exact and Technological Sciences.
Braz. j. pharm. sci ; 49(4): 653-658, Oct.-Dec. 2013. ilus, tab
Article in English | LILACS | ID: lil-704096
ABSTRACT
The antibacterial activity of the compounds egonol (1) and homoegonol (2), of the crude ethanolic extract of Styrax pohlii (Styracaceae) aerial parts (EE), and of its n-hexane (HF), EtOAc (EF), n-BuOH (BF), and hydromethanolic (HMF) fractions was evaluated against the following microorganisms Streptococcus pneumoniae (ATCC 6305), S. pyogenes (ATCC 19615), Haemophilus influenzae (ATCC 10211), Pseudomonas aeruginosa (ATCC 27853), and Klebsiella pneumoniae (ATCC 10031). The broth microdilution method was used for determination of the minimum inhibitory concentration (MIC) during preliminary evaluation of antibacterial activity. The EE yielded MIC values of 400 µg/mL for S. pneumoniae and P. aeruginosa and 300 µg/mL for H. influenzae. The HF and EF fractions exhibited enhanced antibacterial activity, with MIC values of 200 µg/mL against S. pneumoniae, but only EF displayed activity against H. influenzae (MIC 200 µg/mL). The best MIC value with compounds 1 and 2 (400 µg/mL) was obtained for (1) against S. pneumoniae and P. aeruginosa. Therefore, 1 exhibited weak antibacterial activity against these standard strains.
RESUMO
As atividades antimicrobianas das substâncias egonol (1) e homoegonol (2), do extrato etanólico das partes aéreas de Styrax pohlii (Styracaceae) (EE), bem como das frações n-hexano (HF), AcOEt (EF), n-BuOH (BF) e hidrometanólica (HMF) foram avaliadas frente aos seguintes microorganismos Streptococcus pneumoniae (ATCC 6305), S. pyogenes (ATCC 19615), Haemophilus influenzae (ATCC 10211), Pseudomonas aeruginosa (ATCC 27853) e Klebsiella pneumoniae (ATCC 10031). O método de microdiluição em caldo foi utilizado para a determinação da concentração inibitória mínima (CIM) na avaliação preliminar da atividade antimicrobiana. EE mostrou valores de CIM de 400 µg/mL para S. pneumoniae e P. aeruginosa, e 300 µg/mL para H. influenzae. As frações HF e EF apresentaram melhora na atividade antimicrobiana, com valores de CIM de 200 µg/mL frente S. pneumoniae, mas apenas EF apresentou ação contra H. influenzae (200 µg/mL). Em relação às substâncias 1 e 2, o melhor valor de CIM (400 µg/mL) foi obtido por 1 frente a S. pneumoniae e P. aeruginosa, que exibiu fraca atividade antimicrobiana contra estas cepas padrões.
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Full text: Available Index: LILACS (Americas) Main subject: Styracaceae / Styrax Language: English Journal: Braz. j. pharm. sci Year: 2013 Type: Article / Project document Affiliation country: Brazil

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Full text: Available Index: LILACS (Americas) Main subject: Styracaceae / Styrax Language: English Journal: Braz. j. pharm. sci Year: 2013 Type: Article / Project document Affiliation country: Brazil