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Proteomic Analysis Reveals Inflammation Modulation of κ/ι-Carrageenan Hexaoses in Lipopolysaccharide-Induced RAW264.7 Macrophages.
Journal of Agricultural and Food Chemistry 2018 May 10
κ/ι-Carrageenan hexaoses (κ/ι-neocarrahexaoses, KCO-4) are a type of carrageenan oligosaccharide that have a broad spectrum of bioactivities due to the presence of sulfate groups. However, the anti-inflammatory capacity of purified carrageenan oligosaccharides and the underlying mechanism has not been completely elucidated. The present study aimed to investigate inflammatory signaling modulation of KCO-4 in LPS-induced macrophages using a quantitative proteomic strategy. KCO-4 inhibited the oversecretion of inflammatory mediators (i.e., NO, TNF-α, IL-1β, IL-8, iNOS, and COX-2). KCO-4 treatment altered proteome profile, and metabolic processes in mitochondria were significantly disrupted. The IPA network analysis proposed that KCO-4 triggered the NF-κB signaling pathway-dependent anti-inflammation process through the inhibition of CD14/Rel@p50 in LPS-induced RAW264.7 macrophages. These data improve our understanding of the anti-inflammatory mechanism and contribute to exposure biomarker screening of κ-carrageenan oligosaccharides.
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