CELLMED (셀메드)

Cellmed Orthocellular Medicine and Pharmaceutical Association (셀메드 세포교정의약학회)
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Antimicrobial activity of Gynura segetum's leaf extracts and its active fractions

  • Seow, Lay-Jing (School of Pharmaceutical Sciences, Universiti Sains Malaysia) ;
  • Beh, Hooi-Kheng (School of Pharmaceutical Sciences, Universiti Sains Malaysia) ;
  • Ibrahim, Pazilah (School of Pharmaceutical Sciences, Universiti Sains Malaysia) ;
  • Sadikun, Amirin (School of Pharmaceutical Sciences, Universiti Sains Malaysia) ;
  • Asmawi, Mohd Zaini (School of Pharmaceutical Sciences, Universiti Sains Malaysia)
  • Received : 2012.03.12
  • Accepted : 2012.05.22
  • Published : 2012.05.31
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Abstract

$Gynura$ $segetum$ (Lour.) Merr. ($Compositae$) is a well recognized medicinal plant in Indonesia and Malaysia. It is believed to have an anticoagulant effect and is used in treating snake-bites, inflammations and other skin afflictions. This study was carried out to evaluate the antimicrobial effects of $Gynura$ $segetum$ leaves extracts and its fractions. The chemical compositions of the active extracts were also determined. The antimicrobial activities of different solvent extracts of leaves of $Gynura$ $segetum$ were evaluated using the agar well-diffusion method. The Minimum Inhibitory Concentration (MIC) of the active subfractions was determined by the tube dilution method. Gas Chromatography-mass spectrometry (GC-MS) analysis was carried out to identify the chemical compositions of the active extracts. The ethyl acetate fraction and its subfraction E4 performed potent antimicrobial activities and fifteen known chemical constituents were identified by GCMS analysis as 4-vinylphenol, 1-tetradecene, phenol, 2,4-bis(1,1-dimethylethyl), 1-hexadecene, E-15-heptadecenal, hexadecanoic acid, 1,2-benzenedicarboxylic acid, dibutyl ester, 1-docosene, octadecanoic acid, 1-eicosene, cyclotetracosane, 1,2-benzenedicarboxylic acid, bis(2-ethylhexyl)ester, butanedioic acid, monomethyl ester, niacin and 4-hydroxy-benzoic acid. The results of this study suggested a connection between the antimicrobial activities and the chemical structures. The plant may be used as a potential source for antimicrobial agents.

Keywords

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