BACKGROUND The oxidant stress, expected to increase in obese adults, has an important role in the pathogenesis of many diseases. It results when free radical formation is greatly increased or protective antioxidant mechanisms are compromised. The main objective of this study is to evaluate the antioxidant response to obesity-related stress in healthy children. METHODS A hundred and six health...

Objective: The present study aimed to the isolation and characterization of phytochemicals from tissue cultures of Arnebia hispidissima. The isolated compounds were evaluated for their antioxidant and antimicrobial activities. Materials and Methods: Six derivatives of alkannin and shikonin were isolated and characterized by using various physical and spectroscopic techniques from callus tissue ...

In this paper, we present novel bioactivity for barettin isolated from the marine sponge Geodia barretti. We found that barettin showed strong antioxidant activity in biochemical assays as well as in a lipid peroxidation cell assay. A de-brominated synthetic analogue of barettin did not show the same activity in the antioxidant cell assay, indicating that bromine is important for cellular activ...

OBJECTIVES Pistacia lentiscus has traditionally been used in the treatment of many diseases. Its resin was investigated for its mineral contents, anti-inflammatory and antioxidant activities in rats. MATERIAL AND METHODS Inhibition of carrageenan induced edema was used to evaluate anti-inflammatory activity. Fe2+ chelating ability, 1,1-diphenyl-2-picryl hydrazyl radical (DPPH) and nitric oxid...

Relative antioxidant activities of a methanolic extract of three phenylpropanoid glycosides and three iridoid glycosides from Wulfenia carinthiaca were evaluated using the Briggs-Rauscher (BR) reaction method. This method is based on the inhibitory effects by antioxidants on oscillations of the BR reaction. The total extract showed a certain antioxidant activity with respect to resorcinol chose...

Antioxidant activity of the ethanol extract of Sida rhombifolia was determined by DPPH free radical, hydrogen peroxide scavenging assays, reducing power, total antioxidant capacity using phosphomolybdenum method, and rapid radical scavenging screening methods. Preliminary phytochemical screening revealed that the extract of S. rhombifolia leaves (SR-L), stem (SR-S) and roots (SR-R) possesses ph...

In view of the oxidative stress implicated in the pathophysiology of a wide variety of different diseases, a therapeutic strategy to elevate the antioxidant defenses of the body may be of assistance in protecting from different diseases and disorders. This special issue includes 19 articles that emphasize the importance of medicinal plants in augmenting oxidative stress in cancer, aging, inflam...

Anaphalis neelgerriana DC and Cnicus wallichi DC belonging to the family Asteraceae (Compositae) are important medicinal plants indigenous to Nilgiris. Since the related species Anaphalis morrisonicola and Cnicus benedictus were reported for its anti cancer activities, the above mentioned plants were screened for Invitro antioxidant activity. In vitro antioxidant studies were carried out by DPP...

Dendrophthoe falcata is a parasitic plant used in traditional medicine as an aphrodisiac, astringent, and diuretic and for pulmonary tuberculosis, asthma, menstrual disorder, swelling, and wound. The present study primarily describes the antioxidant activities of methanolic and aqueous extracts of the stem of D. falcate in different in vitro models. Both methanolic and aqueous extracts exhibite...

Essential oils (EOs) of chamomile contain several bioactive compounds, including monoterpenes, sesquiterpenes, triterpenes and fatty acids. Hydrodistillation of chamomile EO induces the formation of chamazulene, a bioactive compound. Chamazulene was isolated from the EO by column chromatography. The total antioxidant capacity confirmed a higher antioxidant activity of chamazulene (IC50 = 6.4 μg...