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1

Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, Trg Dositeja Obradovica 3, Novi Sad 21000, Serbia

2

Middle European High School, Kráľovská 386-11, Skalica 90901, Slovakia

3

Department of Environmental Protection, Faculty of Technical Sciences, Trg Dositeja Obradovica 3, Novi Sad 21000, Serbia





*

Author to whom correspondence should be addressed.



Abstract In order to examine the antioxidant properties of five different extracts of Trifolium pratense L. Leguminosae leaves, various assays which measure free radical scavenging ability were carried out: 1,1-diphenyl-2-picrylhydrazyl, hydroxyl, superoxide anion and nitric oxide radical scavenger capacity tests and lipid peroxidation assay. In all of the tests, only the H2O and to some extent the EtOAc extracts showed a potent antioxidant effect compared with BHT and BHA, well-known synthetic antioxidants. In addition, in vivo experiments were conducted with antioxidant systems activities of GSHPx, GSHR, Px, CAT, XOD, GSH content and intensity of LPx in liver homogenate and blood of mice after their treatment with extracts of T. pratense leaves, or in combination with CCl4. Besides, in the extracts examined the total phenolic and flavonoid amounts were also determined, together with presence of the selected flavonoids: quercetin, luteolin, apigenin, naringenin and kaempferol, which were studied using a HPLC-DAD technique. HPLC-DAD analysis showed a noticeable content of natural products according to which the examined Trifolium pratense species could well be regarded as a promising new source of bioactive natural compounds, which can be used both as a food supplement and a remedy.

Keywords: Trifolium pratense; antioxidant activity; flavonoids; biochemical parameters Trifolium pratense; antioxidant activity; flavonoids; biochemical parameters





Author: Biljana Kaurinovic 1,* , Mira Popovic 1, Sanja Vlaisavljevic 1, Heidy Schwartsova 2 and Mirjana Vojinovic-Miloradov 3

Source: http://mdpi.com/



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