A COMPARATIVE STUDY OF BACTERIOSTATIC ACTIVITY OF SYNTHETIC HYDROXYLATED FLAVONOIDS

Brazilian Journal of Microbiology

Mónica S. Olivella¹  Valeria E.p. Zarelli¹  Nora B. Pappano¹  Nora B. Debattista¹ 

[1] ,San Luis National University Department of Chemistry Laboratory of Physical-ChemistryChacabuco San Luis ,Argentina

关键词: flavanone;    flavone;    chalcone;    bacteriostatic activity;    flavanona;    chalcona;    atividade bacteriostática;   

DOI  :  10.1590/S1517-83822001000300013

来源: SciELO

【 摘 要 】

Among other properties, flavonoids present a notable bacteriostatic activity. In this paper, minimal inhibitory concentrations (MICs) of 5,7,4'-trihydroxyflavanone (naringenin), 5,7-dihydroxyflavone and 2',4',4- trihydroxychalcone (isoliquitirigenin) against Staphylococcus aureus ATCC 25 923 were determined and compared to values obtained for other chalcones and flavanones previously investigated. Specific growth rates and MICs were determined by a turbidimetric kinetic method. The observed sequence MICflavanone (inactive) >MIC7-hidroxyflavanone (197.6 µgml-1)>MIC5,7,4'-trihydroxyflavanone (120 µgml-1) showed that the introduction of an electron donating group (-OH) causes an increase in bioactivity. On the other hand, the comparisons MIC5,7,4'-trihydroxyflavanone (120 µgml-1) >>> MIC2',4',4-trihydroxychalcone (29 µgml-1) and MIC5,7-dihydroxyflavone (105 µgml-1) >>> MIC2',4'-dihydroxychalcone (28.8 µgml-1) indicated that the chalcone structure is the most favourable for bacteriostatic activity within the flavonoid family.

【 授权许可】

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