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        Filbertone Protects Obesity-induced Hypothalamic Inflammation by Reduction of Microglia-mediated Inflammatory Responses

        무스나이니 루피야,양지현,김지예,김추숙,이찬희,김민선,박태선,Tsuyoshi Goto,유리나 한국생물공학회 2021 Biotechnology and Bioprocess Engineering Vol.26 No.1

        Microglial activation is critical for obesityinduced hypothalamic inflammation and is closely associated with pathologies of metabolic complications. In this study, we investigated the effect of filbertone, a main aroma compound of hazelnuts, on microglia-mediated inflammatory responses in vitro and obesity-induced hypothalamic inflammation in vivo. BV2 microglial cells were stimulated with lipopolysaccharide (LPS) in the presence or absence of filbertone. Meanwhile, C57BL/6 mice were fed for 10- weeks on a high-fat diet (HFD) supplemented with 0.2% filbertone. Levels of inflammatory mediators in microglia or hypothalamus were measured using enzyme-linked immunosorbent assays or quantitative real-time PCR. Filbertone significantly inhibited nitrite oxide production, inducible nitric oxide synthase expression, and inflammatory cytokine production in LPS-stimulated microglia. Filbertone also inhibited LPS-stimulated activation of inflammatory signaling molecules, mitogen-activated protein kinases (MAPK) such as extracellular signal-regulated kinases and p38, and the degradation of inhibitory nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) in microglia. Moreover, filbertone supplementation markedly suppressed the expression of inflammatory cytokines and microglia activation marker in the hypothalamus of obese mice fed a HFD. These results suggest that filbertone reduces HFD-induced microglial activation through inhibition of the MAPK and NF-κB pathways, and thus protects obesityinduced hypothalamic inflammation. Filbertone may be useful for protection of microglia-mediated hypothalamic inflammation in obese condition and related metabolic complications.

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