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Antimicrobial potentials of active component isolated from Citrullus colocynthis fruits and structure–activity relationships of its analogues against foodborne bacteria
Author(s) -
Kim MinGi,
Lee SungEun,
Yang JiYeon,
Lee HoiSeon
Publication year - 2014
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.6590
Subject(s) - antimicrobial , citrullus colocynthis , preservative , bacteria , chemistry , food science , antibacterial activity , minimum inhibitory concentration , traditional medicine , biology , botany , organic chemistry , medicine , genetics
BACKGROUND Synthetic preservatives have been consistently used to maintain the quality of food products. However, the degree of danger to human health cannot be ignored. In this study, the antimicrobial activities of Citrullus colocynthis fruits and 4‐methylquinoline analogues were investigated to develop natural preservatives against foodborne bacteria. RESULTS Antimicrobial activities of the methanol extract and five fractions derived from C. colocynthis fruits were evaluated against five foodborne bacteria. The chloroform fraction possessed strong activities against five foodborne bacteria. 4‐Methylquinoline was isolated by chromatographic analyses. To establish the structure–activity relationships, the antimicrobial activities of 4‐methylquinoline analogues (2‐hydroxyquinoline, 4‐hydroxyquinoline, 6‐hydroxyquinoline, 2‐methylquinoline, 6‐methyquinoline, 8‐methylquinoline and 2‐methyl‐8‐hydroxyquinoline) were tested against food‐borne bacteria. When employing the agar diffusion method, 2‐methyl‐8‐hydroxyquinoline was found to have potent activities against the five foodborne bacteria. In terms of minimum bactericidal concentration or minimum inhibitory concentration, 2‐methyl‐8‐hydroxyquinoline had significantly higher antimicrobial activity against the five foodborne bacteria. CONCLUSION Citrullus colocynthis fruits and 4‐methylquinoline analogues could be useful for the development of eco‐friendly food supplemental agents and pharmaceuticals. © 2014 Society of Chemical Industry