Roseburia intestinalis-derived flagellin is a negative regulator of intestinal inflammation

Biochemical and Biophysical Research Communications
Yongsheng QuanXiaoyan Wang

Abstract

Our previous study showed that the Roseburia intestinalis (R. intestinalis), one of the dominant intestinal bacterial microbiota, was significantly decreased in Crohn's disease patients and protected colon epithelial cells from inflammatory damage. However, the roles of lncRNAs in R. intestinalis flagellin-mediated anti-inflammation remain unclear. In this study, we investigate global lncRNA expression profiles using microarray analysis of ulcerative colitis samples from DSS/Flagellin-challenged mice and identified a Flagellin-induced upregulated lncRNA (HIF1A-AS2). Flagellin induced HIF1A-AS2 expression in a dose- and time-dependent manner via p38-stat1 activation. Selective pharmacological inhibitors of Stat1 and p38, and genetic knockdown of these genes abolished Flagellin-induced HIF1A-AS2 expression. In addition, luciferase reporter assay showed that Flagellin activated HIF1A-AS2 promotor via increasing stat1 phosphorylation. Silencing of HIF1A-AS2 abolished Flagellin-mediated anti-inflammatory effects, evaluating by upregulation of cytokines expression, including TNF-α, IL-1β, IL-6 and IL-12, but not TNFβ. In addition, knockdown of HIF1A-AS2 significantly increased p65 and Jnk phosphorylation, and sufficiently abolished F...Continue Reading

Citations

Sep 19, 2019·Evidence-based Complementary and Alternative Medicine : ECAM·Yan HuangXueping Zhou
Jun 17, 2020·Cell Death & Disease·Lihui LinShenghong Zhang
Oct 23, 2019·Signal Transduction and Targeted Therapy·Ziying ZhangYongguang Tao
Oct 11, 2020·Signal Transduction and Targeted Therapy·Ziying ZhangYongguang Tao
May 28, 2021·World Journal of Gastroenterology : WJG·Xiao-Juan YangXiao-Jun Yang
Jul 30, 2021·World Journal of Methodology·Xin-Yu Zeng, Ming Li

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