Article (Scientific journals)
Phenolic profile and biological activities of Micromeria graeca (L.) Benth.ex Rchb.
Brahmi, Fatiha; Guendouze, Naïma; Hauchard, D. et al.
2017In International Journal of Food Properties, 20, p. 2070-2083
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Abstract :
[en] The medicinal potential of the ethanol extract of Micromeria graeca (L.) Benth. ex Rchb., harvested in Algeria (MG extract), was evaluated by assessing in vitro its antioxidant, antibacterial, and antityrosinase properties. The total phenolic (= 430 ± 30 mg gallic acid equivalent/100 g of dry weight) and flavonoid (= 190 ± 10 mg quercetin equivalent/100 g of dry weight) contents were evaluated by the Folin-Ciocalteu and the aluminium chloride methods, respectively. Silica gel thin-layer chromatography revealed the presence of chlorogenic, caffeic, and rosmarinic acids and diosmin; the presence of these compounds was confirmed by reverse phase high-performance liquid chromatography. The IC50 values indicate that the ethanol extract of M. graeca is highly potent in neutralizing the 2,2ʹ-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) cation radicals (ABTS.+; IC50 = 30.5 ± 0.9 µg/mL) and the 2,2ʹ-diphenyl-1-picrylhydrazyl radicals (DPPH.; IC50 = 65.8 ± 2.4 µg/mL). The MG extract was also very active on a lipid peroxidation model (IC50 = 23.4 ± 1.9 µg/mL). The superoxide quenching index values (electrochemically measured) were 332 ± 37 (AI30) and 638 ± 53 µg/mL (AI50). The studied extract showed a moderate tyrosinase inhibitory activity (IC50 = 302 ± 62 µg/mL) and a low antibacterial effect while the combination of this extract with antibiotics restored the activities of cefotaxime and streptomycin on resistant Staphylococcus aureus and Pseudomonas aeruginosa.
Disciplines :
Pharmacy, pharmacology & toxicology
Chemistry
Author, co-author :
Brahmi, Fatiha
Guendouze, Naïma
Hauchard, D.
Okusa, P.N.
Kamagaju, L.
Madani, K.
Duez, Pierre  ;  Université de Mons > Faculté de Médecine et de Pharmacie > Service de Chimie thérapeutique et Pharmacognosie
Language :
English
Title :
Phenolic profile and biological activities of Micromeria graeca (L.) Benth.ex Rchb.
Publication date :
20 December 2017
Journal title :
International Journal of Food Properties
ISSN :
1094-2912
eISSN :
1532-2386
Publisher :
Marcel Dekker, New York, United States - New York
Volume :
20
Pages :
2070-2083
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
M136 - Chimie thérapeutique et Pharmacognosie
Research institute :
R550 - Institut des Sciences et Technologies de la Santé
Available on ORBi UMONS :
since 20 January 2018

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