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Abstract Title:

Combination Treatments with Luteolin and Fisetin Enhance Anti-Inflammatory Effects in High Glucose-Treated THP-1 Cells Through Histone Acetyltransferase/Histone Deacetylase Regulation.

Abstract Source:

J Med Food. 2017 Jun 26. Epub 2017 Jun 26. PMID: 28650731

Abstract Author(s):

Arang Kim, Jung-Mi Yun

Article Affiliation:

Arang Kim

Abstract:

Hyperglycemia leads to diabetes and its diabetic complications. In this study, we investigated the synergistic effects of luteolin and fisetin on proinflammatory cytokine secretion and its underlying epigenetic regulation in human monocytes exposed to hyperglycemic (HG) concentrations. Human monocytic cells (THP-1) were cultured under controlled (14.5 mM mannitol), normoglycemic (5.5 mM glucose), or HG (20 mM glucose) conditions in the absence or presence of the two phytochemicals for 48 h. Whereas HG conditions significantly induced histone acetylation, nuclear factor-kappa B (NF-κB) activation, interleukin 6, and tumor necrosis factor-α release from THP-1 cells; combination treatments with the two phytochemicals (500 nM fisetin, and l μM and 500 nM luteolin) suppressed NF-κB activity and inflammatory cytokine release. Fisetin, luteolin, and their combination treatments also significantly decreased the activity of histoneacetyltransferase, a known NF-κB coactivator; inhibited reactive oxygen species production; and activated sirtuin (SIRT)1 and forkhead box O3a (FOXO3a) expressions (P < .05). Thus, combination treatments with the two phytochemicals inhibited HG condition-induced cytokine production in monocytes, through epigenetic changes involving NF-κB activation. We, therefore, suggest that combination treatments with luteolin and fisetin may be a potential candidate for thetreatment and prevention of diabetes and its complications.

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Sayer Ji
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