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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.
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Hae Jun Lee
Ji-Sun Shin
Kyoung-Goo Lee
Jung-Hwan Nam
Dae Jang
+3 authors
Journal:
2017/August
-
Journal of Cellular Biochemistry
ISSN:
1097-4644
PUBMED:
26931732
DOI:
10.1002/jcb.25530
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. J. Cell. Biochem. 117: 2327-2339, 2016. © 2016 Wiley Periodicals, Inc.
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