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Current Enzyme Inhibition

Author(s): Housseyn Chaoua, Ihcen Khacheba, Hadjer Boussoussa*, Abir Bekhaoua and Mohamed Yousfi

DOI: 10.2174/1573408016666191231124458

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A Potent In Vitro α-Amylase Inhibitory Action of Haplophyllum tuberculatum Extracts

Page: [190 - 196] Pages: 7

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Abstract

Background: Natural plant active compounds were found to inhibit the activity of several enzymes that may be related to several diseases.

Objective: This study aimed at testing the antidiabetic activity related to the phenol content by in vitro α-Amylase inhibitory action effect of aqueous, organic and essential oil extracts of Haplophyllum tuberculatum, collected in the town of Laghouat in the steppe region of Algeria.

Methods: Two types of aqueous extracts were prepared: Decoction and Diffusion extracts. The organic extracts were prepared with successful maceration in hexane, dichloromethane, ethyl acetate, ethanol and methanol. Also, essential oils were obtained by hydrodistillation. The analysis of the total Phenol content of our extracts was done with Folin-Ciocalteu reagent, as the flavonoid content was obtained in mixture with aluminum trichloride. The effects of the plant extracts on the catalytic efficiency of α-amylase enzyme were represented by the enzymatic inhibitory percentage of each extract in which the inhibitory activity was expressed as IC50.

Results: The total phenol content showed values ranging between 0.27 and 11.97 mg gallic acid equivalent / g dry matter. The flavonoid contents vary from 0.05 to 1.50 mg equivalent of rutin /g of dry matter. All the extracts showed good inhibitory activity against α- amylase of IC50, values ranged from 0.05 to 50.03 mg/ml.

Conclusion: This study reports for the first time the inhibitory capacity of Algerian Haplophyllum tuberculatum species against α-amylase which could provide natural biologically active agents to be used in the management of diabetes.

Keywords: Diabetes, enzyme inhibition, essential oils, Haplophyllum tuberculatum, phenolic compounds, α amylase.

Graphical Abstract

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