Study of the antioxidant activity of Thymus sibthorpii Bentham (Lamiaceae).

Abstract:

:From the aerial parts of Thymus sibthorpii Bentham (Lamiaceae), five flavonoids apigenin (1), 7-methoxy-apigenin (2), naringenin (3), eriodictyol (4) and eriodictyol-7-glucoside (5), have been isolated together with caffeic acid methyl ester (6), rosmarinic acid (7) and rosmarinic acid methyl ester (8). The structures of the isolated compounds were established by spectroscopic methods. The extracts and the isolated compounds were tested for their free radical scavenging activity using the following in vitro assays: (i) interaction with the free stable radical of DPPH (1,1-diphenyl-2-picrylhydrazyl), (ii) inhibition of linoleic acid lipid peroxidation induced by the dihydrochloric acid of 2,2-azobis-2-amidinepropane (AAPH) and (iii) the scavenging activity of enzymatically produced superoxide anion. Their inhibitory activity toward soybean lipoxygenase was evaluated in vitro, using linoleic acid as a substrate. The antioxidant results of the extracts are discussed in terms of their constitution in phenolic compounds, which were determined following the Folin-Ciocalteu method.

authors

Kontogiorgis C,Ntella M,Mpompou L,Karallaki F,Athanasios P,Hadjipavlou-Litina D,Lazari D

doi

10.1080/14756366.2016.1222583

subject

Has Abstract

pub_date

2016-01-01 00:00:00

pages

154-159

issue

sup4

eissn

1475-6366

issn

1475-6374

journal_volume

31

pub_type

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