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http://dx.doi.org/10.14374/HFS.2019.27.3.223

Antidiabetic Effects of Mixed Extract from Dendropanax morbiferus, Broussonetia kazinoki, and Cudrania tricuspidata  

Kim, Sol (Jeonju AgroBio-Materials Institute)
Kim, Sang-Jun (Jeonju AgroBio-Materials Institute)
Oh, Junseok (Dongbu Eastern Herbal Medicine Agricultural Association Corporation)
Hong, Jae-Heoi (Dongbu Eastern Herbal Medicine Agricultural Association Corporation)
Kim, Seon-Young (Jeonju AgroBio-Materials Institute)
Publication Information
Herbal Formula Science / v.27, no.3, 2019 , pp. 223-236 More about this Journal
Abstract
Dengropanax morfiferus (D), Broussonitia kazinoki (B), and Cudriania tricuspidata (E), a widely cultivated species in South Korea, has been used as traditional medicine to treat numerous diseases. In this study, we evaluated the antidiabetic effects in a various signaling mechanisms using mixed extract and major component contents were analyzed by HPLC in the combined extracts from Dengropanax morfiferus, Broussonitia kazinoki, and Cudriania tricuspidata (DBCE). DBCE inhibited ${\alpha}$-glucosidase and ${\alpha}$-amylase activation and showed potent antioxidant effects, which are evaluated using DPPH, ABTS, and SOD assay. Cytokines, which are released by inflammatory cells in pancreatic islets, are involved in the pathogenesis of type 1 diabetes mellitus. DBCE showed the protective effects in RINm5F cells against cytokines-induced damage by suppressing inducible nitric oxide (NO) synthase and COX-2 expression and NO production. Insulin resistance is the primary characteristic of type 2 diabetes. Therefore, the regulatory effect of DBCE on glucose uptake and production are investigated in insulin-responsive human HepG2 cells. DBCE stimulated glucose uptake, prevented Glut2 and phosphor-IRS1 downregulation induced by high glucose (HG, 30 mM). Moreover, DBCE pretreatment diminished glucose levels, PEPCK and G6Pase overexpression provoked by HG. These findings suggest that DBCE might be used for diabetes treatment through alpha-glucosidase or alpha-amylase activity regulation, pancreatic beta cell protection, hepatic glucose sensitivity improvement. Cytokines, which are released by inflammatory cells' infiltrations around the pancreatic islets, are involved in the pathogenesis of type 1 diabetes mellitus.
Keywords
Antidiabetic effects; Broussonetia kazinoki; Cudrania tricuspidata; Dendropanax morbiferus; hyperglycemia;
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