Antioxidant, antimicrobial, antitopoisomerase and gastroprotective effect of herbal infusions from four Quercus species

► Infusions from leaves of Quercus laeta and Q. grisea displayed higher radical scavenging activity. ► Infusions from Q. grisea and Q. obtusata were more efficient in preventing the formation of hydroxyl radicals. ► Infusions from Q. resinosa showed a broader antimicrobial spectrum. ► Q. resinosa le...

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Bibliographic Details
Published in:	Industrial crops and products Vol. 42; pp. 57 - 62
Main Authors:	Sánchez-Burgos, J.A., Ramírez-Mares, M.V., Larrosa, M.M., Gallegos-Infante, J.A., González-Laredo, R.F., Medina-Torres, L., Rocha-Guzmán, N.E.
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-03-2013
Subjects:	Anti-topoisomerase activities Antimicrobial activity antimicrobial properties Deoxyribose DPPH free radical scavengers hydroxyl radicals leaves Quercus Anti-topoisomerase activities Quercus DPPH Deoxyribose
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Summary:	► Infusions from leaves of Quercus laeta and Q. grisea displayed higher radical scavenging activity. ► Infusions from Q. grisea and Q. obtusata were more efficient in preventing the formation of hydroxyl radicals. ► Infusions from Q. resinosa showed a broader antimicrobial spectrum. ► Q. resinosa leaves infusions showed antitopoisomerase activity. Leaves from four species of white oaks (Quercus resinosa, Quercus laeta, Quercus grisea, and Quercus obtusata) were investigated for the evaluation and comparison of their antioxidant, antimicrobial, anti-topoisomerase, and anti-proliferative activities. DPPH and hydroxyl radical scavenging capacities were tested in vitro. Results indicated that aqueous extracts from leaves of Quercus laeta and Q. grisea displayed higher radical scavenging activity, while extracts from Q. grisea and Q. obtusata were more efficient in inhibiting the degradation of deoxyribose, preventing the formation of hydroxyl radicals. Polar extracts showed different degrees of antimicrobial activity, presenting Q. resinosa leaves a broader spectrum. In the anti-topoisomerase assay only Q. resinosa leaves infusions showed activity. The investigation indicates that the biological activity of aqueous extracts from oak leaves promises a more rational and effective application of this resource in the near future.
Bibliography:	http://dx.doi.org/10.1016/j.indcrop.2012.05.017 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0926-6690 1872-633X
DOI:	10.1016/j.indcrop.2012.05.017