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Abstract Title:

Effects of polysaccharides isolated from Inonotus obliquus against hydrogen peroxide-induced oxidative damage in RINm5F pancreatic β-cells.

Abstract Source:

Mol Med Rep. 2016 Sep 22. Epub 2016 Sep 22. PMID: 27667194

Abstract Author(s):

Ye Chan Sim, Jong Seok Lee, Sarah Lee, Youn Kyoung Son, Jung-Eun Park, Jeong Eun Song, Suk-Jin Ha, Eock Kee Hong

Article Affiliation:

Ye Chan Sim

Abstract:

The purpose of the present study was to elucidate the cytoprotective effects of polysaccharides isolated from Inonotus obliquus. The polysaccharides were extracted from the fruiting body of I. obliquus (PFIO) and the liquid culture broth of I. obliquus (PLIO). The effects of PFIO and PLIO on hydrogen peroxide (H2O2)‑induced oxidative damage of RINm5F pancreatic β‑cells were comparatively investigated usingan MTT assay, immunofluorescent staining, flow cytometry, and western blot analyses in vitro. The results of the present study demonstrated that treatment with PFIO and PLIO decreased DNA fragmentation and the rate of apoptosis. In addition, pretreatment of cells with PFIO and PLIO prior to H2O2 exposure resulted in increased insulin secretion and scavenging activity for intracellular reactive oxygen species, as compared with treatment with H2O2 alone. The results of the present study suggested that PFIO and PLIO may exert protective effects against H2O2‑induced oxidative stress via the regulation of mitogen‑activated protein kinases, nuclear factor‑κB and apoptotic proteins. Therefore, PFIO and PLIO may have potential merit as a medicinal food for the prevention of diabetes.

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Sayer Ji
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