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<i>Scrophularia Tenuipes</i> Coss and Durieu: Phytochemical Composition and Biological Activities
oleh: Zeyneb Chaibeddra, Salah Akkal, Houria Ouled-Haddar, Artur M. S. Silva, Ammar Zellagui, Mohamed Sebti, Susana M. Cardoso
Format: | Article |
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Diterbitkan: | MDPI AG 2020-04-01 |
Deskripsi
<i>Scrophularia tenuipes</i> is an Algerian-Tunisian endemic species, which has not been studied yet. Ethyl acetate (EA) and <i>n</i>-butanol (Bu) fractions obtained from <i>Scrophularia tenuipes</i> were investigated for their health benefit properties, in particular with respect to in vivo/in vitro anti-inflammatory and antioxidant activities, as well as their potential to inhibit key enzymes with impact in diabetes (α-glucosidase and α-amylase). The fractions had a distinct phytochemical composition, of which EA was richer in total phenolic compounds (225 mg GAE/g) and mostly composed of the phenylethanoid acetyl martynoside. Compared to EA, Bu had higher amounts of total flavonoids, and according to the result obtained from UHPLC-DAD-ESI-MS<sup>n</sup> analysis, harpagoside (iridoid) was its major phytochemical. EA fraction was quite promising with regard to the in vivo (at 200 mg/kg, po) anti-inflammatory effect (62% and 52% for carrageenan-induced rat paw edema and xylene-induced ear edema tests, respectively), while Bu fraction exhibited a stronger antioxidant capacity in all tests (IC<sub>50</sub> = 68 µg/mL, IC<sub>50</sub> = 18 µg/mL, IC<sub>50</sub> = 18 µg/mL and A<sub>0.50</sub> = 43 µg/mL for DPPH<sup>●</sup>, ABTS<sup>•+</sup>, O<sub>2</sub><sup>•−</sup> scavenging assays and cupric-reducing antioxidant capacity method, respectively). Both fractions also showed a strong effect against α-amylase enzyme (IC<sub>50</sub> = 8 µg/mL and 10 µg/mL for EA and Bu fraction, respectively).