Antioxidative and anti-α-amylase activities of four wild plants consumed by pastoral nomads in Egypt

다국어 초록 (Multilingual Abstract)

In this study, four plants grown naturally in Egypt that are usually consumed by pastoral nomads
were screened for their total phenolic contents, antioxidative, and anti-α-amylase activities. Dried
powder of plant’s part was extracted in absolute or 70% ethanol. A polar extract of Panicum turgidum
(PTPE) had the highest total polyphenol content {92.5 mg gallic acid equivalents (GAE)/g},
followed by an alkaloid extract of Withania somnifera (WSAlk; 77.5 mg GAE/g), and an ethanol
extract of Leptadenia pyrotechnica (LPEE; 59.1 mg GAE/g). By employing different assays such as
DPPH radical scavenging, reducing power, Fe+ chelating, H2O2 scavenging and total antioxidant
capacity, it was shown that PTPE, WSEE (ethanol extract of W. somnifera), WSAlk and LPEE had
promising antioxidant activity, though, their potency varied according to the different tests.
WSAlk had the highest level of α-amylase inhibition (40.2%) in vitro, followed by WSEE (30.5%).
Therefore, it can be concluded that these plants, especially extracts of PTPE, and WSAlk are
beneficial to physiological health, and could be used in food and pharmaceutical industries to
prepare dietary supplements, functional foods or food preservatives.

다국어 초록 (Multilingual Abstract)

In this study, four plants grown naturally in Egypt that are usually consumed by pastoral nomads
were screened for their total phenolic contents, antioxidative, and anti-α-amylase activities. Dried
powder of plant’s part was extracted in absolute or 70% ethanol. A polar extract of Panicum turgidum
(PTPE) had the highest total polyphenol content {92.5 mg gallic acid equivalents (GAE)/g},
followed by an alkaloid extract of Withania somnifera (WSAlk; 77.5 mg GAE/g), and an ethanol
extract of Leptadenia pyrotechnica (LPEE; 59.1 mg GAE/g). By employing different assays such as
DPPH radical scavenging, reducing power, Fe+ chelating, H2O2 scavenging and total antioxidant
capacity, it was shown that PTPE, WSEE (ethanol extract of W. somnifera), WSAlk and LPEE had
promising antioxidant activity, though, their potency varied according to the different tests.
WSAlk had the highest level of α-amylase inhibition (40.2%) in vitro, followed by WSEE (30.5%).
Therefore, it can be concluded that these plants, especially extracts of PTPE, and WSAlk are
beneficial to physiological health, and could be used in food and pharmaceutical industries to
prepare dietary supplements, functional foods or food preservatives.

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