Étude de l’implication des composés phénoliques des extraits de trois variétés de datte dans son activité antibactérienne

Amiour, Saliha Daas; Alloui-Lombarkia, O.; Bouhdjila, F.; Ayachi, Ammar; Hambaba, Leila

doi:10.1007/s10298-014-0843-9

Cited by 14 publications

(9 citation statements)

References 21 publications

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“…These results indicated the influence of the extraction solvent on the total content of secondary metabolites. Similar findings were obtained by others studies [25][26][27]. In contrast, anthocyans and alkaloids were absents in all date extracts.…”

Section: Phytochemical Characterization Of Date Extractssupporting

confidence: 92%

Bioactivity of Algerian palm dates Phoenix dactylifera L

Mihoub¹,

Freha²,

Lakhdar-Toumi³

2019

Ukr. food j.

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Introduction. The current study was conducted in order to evaluate in vitro the phytochemical profile and antibacterial activity of Algerian palm dates Phoenix dactylifera L. Materials and methods. Qualitative and quantitative (total polyphenols, flavonoids and antioxidant activity)phytochemical analysis were performed on aqueous and methanolic extracts of seven varieties of dates as the evaluation of antibacterial activity against Staphylococcus aureus ATCC 25923 and Escherichia coli ATCC 25922 strains. Results and discussion. Phytochemical screening of aqueous and methanolic extracts showed the presence of several families of chemical compounds such as catechin tannins, saponins and terpenoids in the seven varieties of dates. The screening of these extracts reveals slight qualitative differences with a greater presence of saponins in the aqueous extract while terpenoids are present in large quantity in the methanolic extract. A quantitative characterization of extracts showed significantly high levels (P<0.05) in the methanolic extract from: 85.8±0.8 to 275 ± 0.07 GAE/100g, 36.9 ± 0.3 to 70.1 ± 0.9 QE/100g and 18.5 ± 0.9 to 58.5 ± 0.5% vs. 66.1±0.2 to 189±0.09 GAE/100g, 29.1±0.5 to 50.8±0.6 QE/100g and 14.7±0.4 to 41±0.1% in aqueous extracts for total polyphenols, flavonoids and reducing power respectively. The susceptibility of bacterial species to various extracts of Phoenix dactylifera L. fruits by agar well diffusion assay showed a maximum inhibition zone diameter (IZD) of 43.0 ± 1.0 and 26.3 ± 1.5 mm for the methanolic extract of the variety Tamesrit against S. aureus and E. coli strains respectively. The minimum inhibitory concentrations (MIC) ranged from 0.08 g / mL for the methanolic extract of the variety H'mira against E. coli to less than 0.04 g/mL for the methanolic extracts of the varieties Tamesrit, Akerbouch and Bent Kbala against S. aureus. Conclusion. Given the interesting contents of polyphenols, flavonoids and antioxidant activity in addition to the inhibitory power of date extracts, we can conclude that this product could be an excellent source of antioxidants and bioconservatives in food preparation.

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Section: Phytochemical Characterization Of Date Extractssupporting

confidence: 92%

Bioactivity of Algerian palm dates Phoenix dactylifera L

Mihoub¹,

Freha²,

Lakhdar-Toumi³

2019

Ukr. food j.

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“…Similarly, to TPC, methanolic extracts of shea shell showed the highest total flavonoid content (1.832±0.00 g Quercetin Eq/100g DM) compared to methanolic extracts of press-cake with 0.243±0.01 g Quercetin Eq/100g DM (Table I). Methanol extraction also yielded higher total flavonoid concentrations compared to different date varieties (Ghar, Deglet and Mech-Degla with 0.143, 0.136 and 1.05 mg EQ/100 g of DM, respectively) as observed by authors [23]. Therefore, these high contents in total flavonoids allow to consider these shea byproducts as excellent natural sources of bioactive compounds and thus consider their use in the various food and non-food industries due to their possible impact on nutrition and consumers health [24].…”

Section: B Phenolic Compounds Content Of Shea Shells and Presscakesupporting

confidence: 67%

Shea Shells and Press-Cake as New Sources of Bioactive Phenolic Compounds: GC MS Profile and in vitro Antioxidant Activity

Kouakou

Cissé

Megnanou

et al. 2021

EJBIO

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Shea nuts shells and press cake are shea butter processing byproducts. Their content in phenolic bioactive compounds and their antioxidant capacity were studied. The total phenolic and flavonoid contents ranged between 16.962-21.395 mg GAE/100g DM and 0.243-1.83 mg QE/100g DM, for press-cake and shells, respectively. Antioxidant capacity values assessed by EC50 using DPPH, ABTS and FRAP methods were in the range of 0.398-0.235 mg/mL, 0.623-0.465 mg/mL and 0.137-0.154 mg/mL for shea press-cake and shells, respectively. Shea shells recorded the highest total phenolic and flavonoid compounds positively correlated with DPPH and ABTS radical scavenging. Catechins, arbutin and gallic acid were the most abundant phenolic compound identified by GC-MS chromatography with 10.4; 2.1 and 0.8 g/100 g in shea shells and 2.2; 2.6 and 2.6 g/100 g in press-cake. Based on this phenolic composition shea nuts shells and press cake could be of great importance in cosmetic and pharmaceutical industries, and also contribute to preventing metabolic and cardiovascular diseases.

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“…Ces derniers auraient donc inhibé la croissance des souches de S. aureus résistante à la méticilline. Ces activités antibactériennes de composés phénoliques ont été mises en évidence dans les travaux de Amiour et al (2014) qui ont montré que des extraits de dattes (Phoenix dactylifera L) contenant de la quercétine et la catéchine inhibaient la croissance de souches de S. aureus. Des résultats ont été obtenus par d'autres auteurs, notamment, Boubeker et al (2018) dans l'étude d'extraits éthanoliques de Helichrysum stoechas (L.) et Ghedadba et al (2018) dans leurs travaux sur les feuilles de Marrubium deserti.…”

Section: Discussionunclassified

Phytochemical analysis, antibacterial activity of hydromethanol extracts from stems of Ximenia americana, Côte d’Ivoire species on methicillin-resistant Staphylococcus aureus

Kakou¹,

Bénié²,

N’Guessan³

et al. 2021

Int. J. Bio. Chem. Sci

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The emergence of bacteria resistant to several families of antibiotics is nowadays a public health problem in the world. To overcome this, it appeared necessary to explore sources of active molecules from natural substances. Thus, the objective of this study was to carry out the phytochemical sorting of hydromethanol extracts from Ximenia americana stems and to evaluate their antibacterial activities on the in-vitro growth of methicillin-resistant Staphylococcus aureus. The phytochemical screening performed allowed us to identify saponins, sterols and polyterpenes, polyphenols, tannins and flavonoids. HPLC-MS/MS analysis lead to the identification of a variety of flavan-3ol, quercetin and derivatives. The study of antibacterial activity carried out on 5 multi-resistant clinical strains and on a reference strain by the Muller-Hinton agar medium diffusion and dilution method showed that the extracts were active on all the strains with MICs ranging from 6.25 to 100 mg and MBCs ranging from 12.5 to 100 mg. The antibacterial potential of these extracts highlighted in this study could make this plant a candidate for in-depth investigations that could lead to the discovery of new antibacterial molecules. L’apparition de bactéries résistantes à plusieurs familles d’antibiotiques constitue, de nos jours, un problème de santé publique dans le monde. Pour y remédier, l’exploration de sources de molécules actives à partir des substances naturelles s’est avérée nécessaire. Ainsi, l’objectif de cette étude était de réaliser le tri phytochimique des extraits hydrométhanoliques de tiges de Ximenia americana et d’évaluer leurs activités antibactériennes sur la croissance in-vitro des Staphylococcus aureus résistant à la méticilline. Le screening phytochimique réalisé a permis d’identifier des saponines, des stérols et polyterpènes, des polyphénols, des tanins et des flavonoïdes. L’analyse à la HPLC-MS/MS a permis d’identifier une variété de flavan-3ol, de la quercétine et dérivées. L’étude de l’activité antibactérienne réalisée sur 5 souches cliniques multirésistantes et sur une souche de référence par la méthode de diffusion et de dilution en milieu gélosé Muller-Hinton a montré que les extraits étaient actifs sur toutes les souches avec des CMI variant de 6,25 à 100 mg et des CMB variant de 12,5 à 100 mg. Le potentiel antibactérien de ces extraits mis en évidence dans cette étude pourrait faire de cette plante une candidate à des investigations approfondies pouvant aboutir à la découverte de nouvelles molécules antibactériennes.

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Étude de l’implication des composés phénoliques des extraits de trois variétés de datte dans son activité antibactérienne

Cited by 14 publications

References 21 publications

Bioactivity of Algerian palm dates Phoenix dactylifera L

Bioactivity of Algerian palm dates Phoenix dactylifera L

Shea Shells and Press-Cake as New Sources of Bioactive Phenolic Compounds: GC MS Profile and in vitro Antioxidant Activity

Phytochemical analysis, antibacterial activity of hydromethanol extracts from stems of Ximenia americana, Côte d’Ivoire species on methicillin-resistant Staphylococcus aureus

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