Antidiabetic Potential Yacon (Smallanthus sonchifolius (Poepp.) H. Rob.) Leaf Extract via Antioxidant Activities, Inhibition of α-glucosidase, α- amylase, G-6-Pase by In Vitro Assay

authors:

avatar Wahyu Widowati 1 , * , avatar Rita Tjokropranoto 1 , avatar Roro Wahyudianingsih 1 , avatar Fen Tih 1 , avatar Lisawati Sadeli 1 , avatar Hanna Widya Kusuma 2 , avatar Nerissa Arviana Fuad 1 , avatar Ermi Girsang 3 , avatar Faustina Audrey Agatha 4

Faculty of Medicine, Maranatha Christian University, Jl. Prof. drg. Surya Sumantri no. 65 Bandung 40164, West Java, Indonesia
Aretha Medika Utama, Biomolecular and Biomedical Research Center, Jl. Babakan Jeruk 2 no.9 Bandung 40163, West Java, Indonesia
Faculty of Medicine, Universitas Prima Indonesia, Jl. Belanga No. 1 Simp. Ayahanda, Medan 20118, North Sumatera, Indonesia
Faculty of Technobiology, Universitas Katolik Indonesia Atmajaya, Jl. Cisauk, BSD, Tangerang Selatan 15345, Banten, Indonesia

How To Cite Widowati W, Tjokropranoto R, Wahyudianingsih R, Tih F, Sadeli L, et al. Antidiabetic Potential Yacon (Smallanthus sonchifolius (Poepp.) H. Rob.) Leaf Extract via Antioxidant Activities, Inhibition of α-glucosidase, α- amylase, G-6-Pase by In Vitro Assay. J Rep Pharm Sci. 2021;10(2):e146960. https://doi.org/10.4103/jrptps.JRPTPS_3_21.

Abstract

Background: Diabetes is a chronic disease characterized by glucose levels and results in impaired insulin secretion. This disorder has triggered oxidative stress and excess free radicals condition. Smallanthus sonchifolius is a traditional medicine that acts as a diabetic therapy. This research aims to bring out the antidiabetic and antioxidant potential of S. sonchifolius extract (SSE). 
Materials and Methods: This study was conducted to measure the qualitative phytochemical identification, antioxidant and anti-diabetic activity of SSE. The antioxidant assay was carried out using 2,2-diphenyl-1-picrylhydrazine (DPPH)- scavenging activity, 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS)-scavenging and hydrogen peroxide (H2O2)-reducing activity assays, ferric reducing antioxidant power (FRAP) potency, while anti-diabetic activity of SSE assay was carried out using inhibitory of α-amylase, α-glucosidase, and Glucose-6-Phosphatase (G-6-Pase). 
Results: SSE contained phenols, flavonoids, steroids/triterpenoids, saponins, tannins, and alkaloids. The antioxidant and antidiabetic activities of samples were calculated based on median inhibitory concentration (IC50). The IC50 values of SSE antioxidant, respectively, were DPPH (IC50 = 62.72 μg/mL), ABTS (IC50 = 61.03 μg/mL), H2O2 (IC50 = 438.36 μg/mL), the highest FRAP activity was 125.31 μM Fe(II)/μg extract at a concentration level of SSE 50 μg/mL. The IC50 values of SSE antidiabetic were α-amylase inhibition (IC50 = 37.86 μg/mL), α-glucosidase inhibition (IC50 = 90.41 μg/ mL), and G-6-Pase inhibition (IC50 = 98.07 μg/mL), respectively. 
Conclusions: SSE has antidiabetic potential through antioxidant activities and α-glucosidase, α-amylase, and G-6-Pase inhibition activities.