Abstract
Moringa oleifera Lam., Moringaceae, and Telfairia occidentalis Hook. f., Curcubitaceae, leaves are two tropical vegetables of medicinal properties. In this study, the inhibitory activities and the radical scavenging potentials of these vegetables on relevant enzymes of type 2-diabetes (α-amylase and α-glucosidase) were evaluated in vitro. HPLC-DAD was used to characterize the phenolic constituents and Fe2+-induced lipid peroxidation in rat's pancreas was investigated. Various radical scavenging properties coupled with metal chelating abilities were also determined. However, phenolic extracts from the vegetables inhibited α-amylase, α-glucosidase and chelated the tested metals (Cu2+ and Fe2+) in a concentration-dependent manner. More so, the inhibitory properties of phenolic rich extracts from these vegetables could be linked to their radical scavenging abilities. Therefore, this study may offer a promising prospect for M. oleifera and T. occidentalis leaves as a potential functional food sources in the management of type 2-diabetes mellitus.
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