Article

Antioxidant activity of Erica arborea.

Canakkale Onsekiz Mart University, Faculty of Science and Arts, Department of Chemistry, Canakkale 17020, Turkey.
Fitoterapia (Impact Factor: 2.22). 01/2008; 78(7-8):571-3. DOI: 10.1016/j.fitote.2007.03.024
Source: PubMed

ABSTRACT The antioxidant properties of the methanol extract of leaves and flowers of Erica arborea and the ethyl acetate, butanol and water soluble fractions were investigated. The ethyl acetate extract was found to be the richest for phenolic and flavonoid content which showed the highest antioxidant activity.

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    ABSTRACT: Aqueous extractions from two species of Erica consumed as infusions in several countries to heal ailments were investigated for their phenolic and flavonoid con-tents, along with antioxidant capacity and radical scavenging capacity using total antioxidant activity, ferric-reducing antioxidant power, reducing power, 1,1-diphenyl-2-picrylhydrazyl and 2-2'-azino-bis(3 ethylbenzothiazoline-6-sulfonic acid) radicals, respectively. Antioxidant properties and total phenolic content dif-fered significantly among these plants. Aqueous extracts of leaves possessed, on average, the highest antioxidant capacity and phenolic content (34.09 10.81 mg ascorbic acid equivalent/g dry weight and 30.59 10.19 mg gallic acid equivalent/ g dry weight, respectively) of all three plant parts. A significant correlation (r 2 = 0.952) between antioxidant capacity and total phenolic content was found, indicating that phenolic compounds are the major contributors to the antioxidant properties of these plants. Upon application of hierarchical cluster analysis to the results obtained, leaves with flowers were grouped in one cluster, whereas branches remained in another cluster, showing little interference from the collec-tion site or species factors.
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    ABSTRACT: Aim The present study was carried out to evaluate the antioxidant and anti-inflammatory capacity, and acute toxicity of Moroccan Erica arborea leaves. Methods Antioxidant capacity was assessed by diphenyle-picryl-hydrazyl (DPPH), phosphomolybdate (PPM) and ferric reducing antioxidant power (FRAP) tests and anti-inflammatory capacity was evaluated by hind paw oedema model using carrageenan-induced inflammation in rat. The acute toxicity was evaluated using mice. Results Acute toxicity of ethanolic extract of E. arborea showed no sign of toxicity at dose of 5 g/kg B.W. Our extracts have important antioxidant properties. The efficient concentration of the ethanolic extract (10.22 μg/ml) required for decreasing initial DPPH concentration by 50% was comparable to that of standard solution butyl-hydroxy-toluene (BHT) (8.87 μg/ml). The administration of ethanolic extract at doses of 200 and 400 mg/kg B.W. was able to prevent plantar oedema and exhibited a significant inhibition against carrageenan-induced inflammation when compared to the control group (NaCl 0.9%) but comparable to those of diclofenac (reference drug). Conclusions Our results show that the leaves of E. arborea may contain some bioactive compounds which are responsible for the antioxidant and anti-inflammatory activities observed here. Our finding may indicate the possibility of using the extracts of this plant to prevent the antioxidant and inflammatory processes.
    Pathologie Biologie 12/2013; 61(6):254–258. · 1.07 Impact Factor
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    ABSTRACT: Two new phenylpropanoid glucosides, 1,2-erythro-1-(3,4,5-trimethoxyphenyl)-2-(b-d-glucopyrano-syloxy)propan-1,3-diol (1) and 7,8-threo-2',8-epoxysyringylglycerol-7-O-a-d-glucopyranoside (ericarbo-side; 2) have been isolated together with four known compounds 2',7-epoxysyringylglycerol-8-O-b-d-glucopyranoside (ficuscarpanoside B; 3), benzylrutinoside (hydrangeifolin; 4), phenethylrutinoside (5), and caffeic acid from the BuOH soluble part of the MeOH extract of the leaves and flowers of E. arborea L. Final purification of the compounds was achieved on a reversed-phase HPLC. Their structures have been elucidated by extensive 1D-and 2D-NMR, and mass spectroscopic techniques. Introduction. – The genus Erica (Ericaceae), comprising ca. 100 species, is distributed in Europe, the Middle East, and Africa [1]. Erica arborea L., commonly known as tree heath, briar root, or funda, is native to a number of countries in Africa, Temperate Asia, and Europe and also naturalized in the British Isles, Australia, and New Zealand [2] [3]. Erica arborea is a shrub or small evergreen tree with a height of one to seven meters, and produces numerous small white flowers [4]. In Turkey, this species is widely distributed throughout West and North Anatolia and the Mediterra-nean basin, and its leaves and flowers have been used as diuretic, urinary antiseptic, diet tea, and laxative [5]. A phytochemical study on E. arborea growing in Turkey was reported by our group, leading to the isolation of (À)-epicatechin and quercitrin [6]. We further reported the isolation and identification of two flavone glycosides tricetin 4'-O-a-l-rhamnopyranoside and isorhamnetin 3-O-a-l-rhamnopyranoside from the leaves of Erica arborea, purchased from a local market in Canakkale (western Anatolia) [7]. A study on the volatile constituents of the flowers was reported by another group [8]. From other Erica species, monoterpenes and condensed tannins have been previously reported [9] [10], as well as flavonoids [11] [12]. In continuation
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