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Article Publish Status: FREE
Abstract Title:

Citrus bergamia Juice Extract Attenuatesβ-Amyloid-Induced Pro-Inflammatory Activation of THP-1 Cells Through MAPK and AP-1 Pathways.

Abstract Source:

Sci Rep. 2016 Feb 8 ;6:20809. Epub 2016 Feb 8. PMID: 26853104

Abstract Author(s):

Monica Currò, Roberto Risitano, Nadia Ferlazzo, Santa Cirmi, Chiara Gangemi, Daniela Caccamo, Riccardo Ientile, Michele Navarra

Article Affiliation:

Monica Currò

Abstract:

Flavonoids have been shown to be effective in protecting against age-related cognitive and motor decline in both in vitro and in vivo models. Recently, a flavonoid-rich extract of Citrus bergamia juice (BJe) has been shown to display anti-oxidant and anti-inflammatory properties against LPS-induced activation of human THP-1 monocytes. In the light of these observations, we wondered whether BJe may be beneficial against neuroinflammatory processes, such as those observed in Alzheimer's disease. To this aim we used THP-1 monocytes to investigate the mechanisms underlying the beneficial potential of BJe against amyloid-beta1-42 (Aβ1-42) -mediated inflammation. Exposure of THP-1 cells to Aβ1-42 significantly induced the expression and secretion of IL-6 and IL-1β in THP-1 cells and increased the phosphorylation of ERK 1/2 as well as p46 and p54 members of JNK family. Moreover, Aβ1-42 raises AP-1 DNA binding activity in THP-1-treated cells. Interestingly, all these effects were reduced in the presence of BJe. Our data indicate that BJe may effectively counteract the pro-inflammatory activation of monocytes/microglial cells exposed to amyloid fibrils, suggesting a promising role as a natural drug against neuroinflammatory processes.

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