Transgenic overexpression of ITGB6 in intestinal epithelial cells exacerbates dextran sulfate sodium-induced colitis in mice.

Transgenic overexpression of ITGB6 in intestinal epithelial cells exacerbates dextran sulfate sodium-induced colitis in mice.
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肠上皮细胞中ITGB6的转基因过表达加剧了葡聚糖硫酸钠诱导的小鼠结肠炎

DOI:
10.1111/jcmm.16297
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发表时间:
2021-03
影响因子:
5.3
通讯作者:
Wang J
Wang J
中科院分区:
医学2区
文献类型:
--
作者:
Chen H;Chen L;Wang X;Ge X;Sun L;Wang Z;Xu X;Song Y;Chen J;Deng Q;Xie H;Chen T;Chen Y;Ding K;Wu J;Wang J

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整合素作为细胞粘附分子的一个大家族,在维持肠道内环境稳定中起着重要作用。在炎症性肠病(IBD)中,体内平衡被破坏。整合素αvβ6主要由整合素β6亚基基因(ITGB 6)调节,是介导细胞-细胞和细胞-基质相互作用的细胞粘附分子。然而,ITGB 6在IBD发病机制中的作用仍然难以捉摸。在这项研究中,我们发现ITGB 6在IBD患者的炎症肠组织中显著上调。然后,我们产生了肠上皮细胞特异性ITGB 6转基因小鼠模型。在急性和慢性葡聚糖硫酸钠(DSS)诱导的结肠炎小鼠模型中,条件性ITGB 6转基因表达加重了实验性结肠炎。生存分析显示,ITGB 6转基因表达与DSS诱导的结肠炎的不良预后相关。此外,我们的数据表明ITGB 6转基因表达增加了巨噬细胞浸润、促炎细胞因子分泌、整合素配体表达和Stat 1信号通路激活。总的来说,我们的研究结果揭示了ITGB 6在IBD中的一个先前未知的作用,并强调了ITGB 6作为IBD诊断标志物和治疗靶点的可能性。
Integrins, as a large family of cell adhesion molecules, play a crucial role in maintaining intestinal homeostasis. In inflammatory bowel disease (IBD), homeostasis is disrupted. Integrin αvβ6, which is mainly regulated by the integrin β6 subunit gene (ITGB6), is a cell adhesion molecule that mediates cell‐cell and cell‐matrix interactions. However, the role of ITGB6 in the pathogenesis of IBD remains elusive. In this study, we found that ITGB6 was markedly upregulated in inflamed intestinal tissues from patients with IBD. Then, we generated an intestinal epithelial cell‐specific ITGB6 transgenic mouse model. Conditional ITGB6 transgene expression exacerbated experimental colitis in mouse models of acute and chronic dextran sulphate sodium (DSS)‐induced colitis. Survival analyses revealed that ITGB6 transgene expression correlated with poor prognosis in DSS‐induced colitis. Furthermore, our data indicated that ITGB6 transgene expression increased macrophages infiltration, pro‐inflammatory cytokines secretion, integrin ligands expression and Stat1 signalling pathway activation. Collectively, our findings revealed a previously unknown role of ITGB6 in IBD and highlighted the possibility of ITGB6 as a diagnostic marker and therapeutic target for IBD.
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