Antigenotoxic activities of crude extracts from Acacia salicina leaves
Identifieur interne : 002740 ( Main/Exploration ); précédent : 002739; suivant : 002741Antigenotoxic activities of crude extracts from Acacia salicina leaves
Auteurs : Hédi B. Mansour [Tunisie] ; Jihed Boubaker [Tunisie] ; Inès Bouhlel [Tunisie] ; Amor Mahmoud [Tunisie] ; Stéphane Bernillon [France] ; Jemni B. Chibani [Tunisie] ; Kamel Ghedira [Tunisie] ; Leila Chekir-Ghedira [Tunisie]Source :
- Environmental and Molecular Mutagenesis [ 0893-6692 ] ; 2007-01.
English descriptors
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Abstract
For centuries, plants have been used in traditional medicines and there has been recent interest in the chemopreventive properties of compounds derived from plants. In the present study, we investigated the effects of extracts of Acacia salicina leaves on the genotoxicity of benzo[a]pyrene (B(a)P) and nifuroxazide in the SOS Chromotest. Aqueous, total oligomers flavonoids (TOF)‐enriched, petroleum ether, chloroform, ethyl acetate, and methanol extracts were prepared from powdered Acacia leaves, and characterized qualitatively for the presence of tannins, flavonoids, and sterols. All the extracts significantly decreased the genotoxicity induced by 1 μg B(a)P (+S9) and 10 μg nifuroxazide (−S9). The TOF‐enriched and methanol extracts decreased the SOS response induced by B(a)P to a greater extent, whereas the TOF‐enriched and the ethyl acetate extracts exhibited increased activity against the SOS response produced by nifuroxazide. In addition, the aqueous, ethyl acetate, and methanol extracts showed increased activity in scavenging the 1,1‐diphenyl‐ 2‐picrylhydrazyl (DPPH) free radical, while 100–300 μg/ml of all the test extracts were active in inhibiting ${\rm O}_2^{\cdot-}$ production in a xanthine/xanthine oxidase system. In contrast, only the petroleum ether extract was effective at inhibiting nitroblue tetrazolium reduction by the superoxide radical in a nonenzymatic ${\rm O}_2^{\cdot-}$‐generating system. The present study indicates that extracts of A. salicina leaves are a significant source of compounds with antigenotoxic and antioxidant activity (most likely phenolic compounds and sterols), and thus may be useful for chemoprevention. Environ. Mol. Mutagen., 2007. © 2006 Wiley‐Liss, Inc.
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DOI: 10.1002/em.20265
Affiliations:
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In the present study, we investigated the effects of extracts of Acacia salicina leaves on the genotoxicity of benzo[a]pyrene (B(a)P) and nifuroxazide in the SOS Chromotest. Aqueous, total oligomers flavonoids (TOF)‐enriched, petroleum ether, chloroform, ethyl acetate, and methanol extracts were prepared from powdered Acacia leaves, and characterized qualitatively for the presence of tannins, flavonoids, and sterols. All the extracts significantly decreased the genotoxicity induced by 1 μg B(a)P (+S9) and 10 μg nifuroxazide (−S9). The TOF‐enriched and methanol extracts decreased the SOS response induced by B(a)P to a greater extent, whereas the TOF‐enriched and the ethyl acetate extracts exhibited increased activity against the SOS response produced by nifuroxazide. In addition, the aqueous, ethyl acetate, and methanol extracts showed increased activity in scavenging the 1,1‐diphenyl‐ 2‐picrylhydrazyl (DPPH) free radical, while 100–300 μg/ml of all the test extracts were active in inhibiting ${\rm O}_2^{\cdot-}$ production in a xanthine/xanthine oxidase system. In contrast, only the petroleum ether extract was effective at inhibiting nitroblue tetrazolium reduction by the superoxide radical in a nonenzymatic ${\rm O}_2^{\cdot-}$‐generating system. The present study indicates that extracts of A. salicina leaves are a significant source of compounds with antigenotoxic and antioxidant activity (most likely phenolic compounds and sterols), and thus may be useful for chemoprevention. Environ. Mol. Mutagen., 2007. © 2006 Wiley‐Liss, Inc.</div></front></TEI><affiliations><list><country><li>France</li><li>Tunisie</li></country></list><tree><country name="Tunisie"><noRegion><name sortKey="Mansour, Hedi B" sort="Mansour, Hedi B" uniqKey="Mansour H" first="Hédi B." last="Mansour">Hédi B. 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