Abstract:
BACKGROUND:Inflammatory bowel disease (IBD)-associated dysbiosis is characterized by a loss of Faecalibacterium prausnitzii, whose supernatant exerts an anti-inflammatory effect. However, the anti-inflammatory substances in F. prausnitzii supernatant and the mechanism in ameliorating colitis in IBD have not yet been fully investigated. METHODS:Experimental colitis models were induced and evaluated by clinical examination and histopathology. Levels of cytokines and ratio of T cells were detected by enzyme-linked immunosorbent assay and flow cytometry analysis, respectively. F. prausnitzii supernatant was separated by macroporous resins. After extraction, the substances in supernatant were identified by gas chromatography-mass spectrometer. T-cell differentiation assay was conducted in vitro. Changes in signaling pathways were examined by immunoblot, immunohistochemistry, and immunofluorescent staining. RESULTS:We found that the supernatant of F. prausnitzii could regulate T helper 17 cell (Th17)/regulatory T cell (Treg) differentiation. Then, we identified butyrate produced by F. prausnitzii that played the anti-inflammatory effects by inhibiting interleukin (IL)-6/signal transducer and the activator of transcription 3 (STAT3)/IL-17 pathway and promoting forkhead box protein P3 (Foxp3). Finally, we demonstrated that the target of butyrate was histone deacetylase 1 (HDAC1). CONCLUSIONS:It is butyrate, instead of other substances produced by F. prausnitzii, that maintains Th17/Treg balance and exerts significant anti-inflammatory effects in colorectal colitis rodents, by inhibiting HDAC1 to promote Foxp3 and block the IL-6/STAT3/IL-17 downstream pathway. F. prausnitzii could be an option for further investigation for IBD treatment. Targeting the butyrate-HDAC1-T-cell axis offers an effective novel approach in the treatment of inflammatory disease.
journal_name
Inflamm Bowel Disjournal_title
Inflammatory bowel diseasesauthors
Zhou L,Zhang M,Wang Y,Dorfman RG,Liu H,Yu T,Chen X,Tang D,Xu L,Yin Y,Pan Y,Zhou Q,Zhou Y,Yu Cdoi
10.1093/ibd/izy182subject
Has Abstractpub_date
2018-08-16 00:00:00pages
1926-1940issue
9eissn
1078-0998issn
1536-4844pii
5001757journal_volume
24pub_type
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