Abstract:
:Sepsis is a systemic inflammatory response resulting from the excessive production of pro-inflammatory cytokines, including tumor necrosis factor (TNF)‑α. Sirtuin 1 (SirT1) actively deacetylates histone proteins, and facilitates chromatin compaction and gene silencing. In the present study, a cell model of sepsis, comprising lipopolysaccharide (LPS)‑tolerant THP‑1 cells, was used to investigate whether the SirT1 activator, resveratrol, repressed the transcription of TNF‑α. Chromatin immunoprecipitation and real‑time PCR were used to determine the transcription of the TNF‑α promoter. The result revealed that the binding of SirT1 to the TNF‑α promoter was decreased by LPS stimulation in normal cells. However, in LPS‑tolerant cells, nuclear protein levels of SirT1 remained elevated, and LPS stimulation had no significant effect on the binding of SirT1 to the TNF‑α promoter. However, the activity of SirT1 was increased and binding of ace‑H4K16 to the TNF‑α promoter was decreased with resveratrol treatment in the tolerant cells. It was concluded that resveratrol stimulated sirtuin activity in LPS‑tolerant THP‑1 cells, and repressed TNF‑α transcription through the deacetylation of H4K16, without affecting the methylation of H3K9. Resveratrol offers potential as an infective candidate to alleviate inflammation in patients with sepsis.
journal_name
Mol Med Repjournal_title
Molecular medicine reportsauthors
Chen GD,Yu WD,Chen XPdoi
10.3892/mmr.2016.5942subject
Has Abstractpub_date
2016-12-01 00:00:00pages
5544-5550issue
6eissn
1791-2997issn
1791-3004journal_volume
14pub_type
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