Mol Nutr Food Res:石榴中发现能阻止阿尔茨海默氏症发展的化合物

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  • 来源:pt电子游戏-pt游戏平台

  Punicalagin inhibits neuroinflammation in LPS-activated rat primary microglia

  A. Olumayokun A. Olajide, Asit Kumar, Ravikanth Velagapudi, Uchechukwu P. Okorji and Bernd L.

  The ability of punicalagin to reduce the production of TNF-α, IL-6 and prostaglandin E2 was measured in culture medium using enzyme immunoassay. TNF-α and IL-6 gene expression in mouse hippocampal slices was measured with PCR. cyclooxygenase-2 and microsomal prostaglandin E synthase 1 protein and mRNA were evaluated with Western blotting and PCR, respectively. Further experiments to investigate effects of punicalagin on protein expressions of inflammatory targets were also determined with Western blotting. Pretreatment of rat primary microglia with punicalagin (5–40 μM) prior to LPS (10 ng/mL) stimulation produced a significant (p < 0.05) inhibition of TNF-α, IL-6 and prostaglandin E2 production. Punicalagin completely abolished TNF-α and IL-6 gene expression in LPS-stimulated hippocampal slices. Protein and mRNA expressions of cyclooxygenase-2 and microsomal prostaglandin E synthase 1 were also reduced by punicalagin pretreatment. Results show that punicalagin interferes with NF-κB signalling through attenuation of NF-κB-driven luciferase expression, as well as inhibition of IκB phosphorylation and nuclear translocation of p65 subunit in the microglia.

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