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Abstract Title:

α-Solanine Isolated from Solanum tuberosum L. cv Jayoung Abrogates LPS-Induced Inflammatory Responses via NF-κB Inactivation in RAW 264.7 Macrophages and Endotoxin-Induced Shock Model in Mice.

Abstract Source:

J Cell Biochem. 2016 Mar 2. Epub 2016 Mar 2. PMID: 26931732

Abstract Author(s):

Ji-Sun Shin, Kyoung-Goo Lee, Hwi-Ho Lee, Hae Jun Lee, Hyo-Jin An, Jung-Hwan Nam, Dae Sik Jang, Kyung-Tae Lee

Article Affiliation:

Ji-Sun Shin

Abstract:

α-Solanine, a trisaccharide glycoalkaloid, has been reported to possess anti-cancer effects. In this study, we investigated the anti-inflammatory effects of α-solanine isolated from 'Jayoung' a dark purple-fleshed potato by examining its in vitro inhibitory effects on inducible nitric-oxide synthase (iNOS), cyclooxygenase-2 (COX-2), and pro-inflammatory cytokines in LPS-induced RAW 264.7 macrophages and its in vivo effects on LPS-induced septic shock in a mouse model. α-Solanine suppressed the expression of iNOS and COX-2 both at protein and mRNA levels and consequently inhibited nitric oxide (NO) and prostaglandin E2 (PGE2 ) production in LPS-induced RAW 264.7 macrophages. α-Solanine also reduced the production and mRNA expression of interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), and interleukin-1β (IL-1β) induced by LPS. Furthermore, molecular mechanism studies indicated that α-solanine inhibited LPS-induced activation of nuclear factor-κB (NF-κB) by reducing nuclear translocation of p65, degradation of inhibitory κBα (IκBα), and phosphorylation of IκB kinaseα/β (IKKα/β). In an in vivo experiment of LPS-induced endotoxemia, treatment with α-solanine suppressed mRNA expressions of iNOS, COX-2, IL-6, TNF-α, and IL-1β, and the activation of NF-κB in liver. Importantly, α-solanine increased the survival rate of mice in LPS-induced endotoxemia and polymicrobial sepsis models. Taken together, our data suggest that the α-solanine may be a promising therapeutic against inflammatory diseases by inhibiting the NF-κB signaling pathway. This article is protected by copyright. All rights reserved.

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