Abstract
Horseradish (Armoracia rusticana Gaertn) is a perennial crop belonging to the Brassicaceae family, widely used as spice in food and as herbal ingredient in ethno-medicine. This study evaluated the phenolic compounds content, antioxidant capacity and anti-lipase activity of methanol, methanol/water (70/30, v/v) and methanol/water (50/50, v/v) extracts of horseradish roots and leaves. Among the extracts tested, both roots and leaves aqueous methanolic (70/30, v/v and 50/50, v/v) extracts showed higher total phenol and flavonoid contents and antioxidant capacity than the corresponding methanol extracts. But extraction yield was high for methanol/ water (50/50, v/v) extracts, in both roots and leaves. The extracts exhibited anti-lipase activity in dose-dependent manner. The results showed that the extraction yield and the antioxidant capacity were strictly dependent on the solvent polarity. The results suggest that A. rusticana could provide opportunities for the development of functional food and further in vivo studies for obesity treatment.
Highlights
Horseradish (Armoracia rusticana Gaertn) is a perennial crop belonging to the Brassicaceae family
The extracts obtained from leaves (Figure 1(b)) showed a Total phenolic content (TPC) content higher than the corresponding root extracts (Figure 1(a))
Results of the present study showed that aqueous methanol extracts of roots and leaves exhibited the highest phenolic contents
Summary
Horseradish (Armoracia rusticana Gaertn) is a perennial crop belonging to the Brassicaceae family. Horseradish, as well as the other members of Brassicaceae family, represents a rich source of health-promoting phytochemicals, and their beneficial effects have been principally attributed to the anticancer properties of GLSs and their ITCs derivatives [3] [4] and vitamins [5]. The inhibition of this digestive lipase represents an important strategy in the treatment of obesity [14]-[17]. To this end, several plants have been screened for their anti-lipase activity [18] [19]. It was observed that the extracts from plants belonging to different families as Brassicaceae (Brassica nigra and Raphanus sativus), Ericaceae (Arctostaphylos uva-ursi and Vaccinium myrtillus), Fabaceae (Pisum sativum and Phaseolus vulgaris), Solanaceae (Solanum tuberosum) and Rosaceae (Malus domestica, Filipendula ulmaria, Rubus ideaus) showed lipase inhibitory activity ranging from 40% to more than 70% [18]
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