Interferon-gamma signaling drives epithelial TNF-alpha receptor-2 expression during colonic tissue repair

IF 4.4 2区 生物学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY
FASEB Journal Pub Date : 2024-08-14 DOI:10.1096/fj.202401695
Sean Watson, Rodolfo I. Cabrera-Silva, Charles A. Parkos, Asma Nusrat, Miguel Quiros
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Abstract

Interferon-gamma (IFNγ) is traditionally recognized for its pro-inflammatory role during intestinal inflammation. Here, we demonstrate that IFNγ also functions as a pro-repair molecule by increasing TNFα receptor 2 (TNFR2 protein/TNFRSF1B gene) expression on intestinal epithelial cells (IEC) following injury in vitro and in vivo. In silico analyses identified binding sites for the IFNγ signaling transcription factor STAT1 in the promoter region of TNFRSF1B. Scratch-wounded IEC exposed to IFNγ exhibited a STAT1-dependent increase in TNFR2 expression. In situ hybridization revealed elevated Tnfrsf1b mRNA levels in biopsy-induced colonic mucosal wounds, while intraperitoneal administration of IFNγ neutralizing antibodies following mucosal injury resulted in impaired IEC Tnfrsf1b mRNA and inhibited colonic mucosal repair. These findings challenge conventional notions that “pro-inflammatory” mediators solely exacerbate damage by highlighting latent pro-repair functions. Moreover, these results emphasize the critical importance of timing and amount in the synthesis and release of IFNγ and TNFα during the inflammatory process, as they are pivotal in restoring tissue homeostasis.

Abstract Image

干扰素-γ 信号在结肠组织修复过程中驱动上皮 TNF-α 受体-2 的表达。
干扰素-γ(IFNγ)在肠道炎症中的促炎症作用历来为人们所公认。在这里,我们证明了 IFNγ 还能通过增加体外和体内损伤后肠上皮细胞(IEC)上 TNFα 受体 2(TNFR2 蛋白/TNFRSF1B 基因)的表达,起到促进修复分子的作用。硅学分析确定了 TNFRSF1B 启动子区域中 IFNγ 信号转录因子 STAT1 的结合位点。暴露于 IFNγ 的划痕伤 IEC 表现出 STAT1 依赖性的 TNFR2 表达增加。原位杂交显示活检诱导的结肠粘膜伤口中 Tnfrsf1b mRNA 水平升高,而粘膜损伤后腹腔注射 IFNγ 中和抗体会导致 IEC Tnfrsf1b mRNA 受损并抑制结肠粘膜修复。这些发现挑战了 "促炎 "介质只会加剧损伤的传统观念,突出了潜在的促修复功能。此外,这些结果还强调了 IFNγ 和 TNFα 在炎症过程中合成和释放的时间和数量的极端重要性,因为它们在恢复组织稳态方面起着关键作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
FASEB Journal
FASEB Journal 生物-生化与分子生物学
CiteScore
9.20
自引率
2.10%
发文量
6243
审稿时长
3 months
期刊介绍: The FASEB Journal publishes international, transdisciplinary research covering all fields of biology at every level of organization: atomic, molecular, cell, tissue, organ, organismic and population. While the journal strives to include research that cuts across the biological sciences, it also considers submissions that lie within one field, but may have implications for other fields as well. The journal seeks to publish basic and translational research, but also welcomes reports of pre-clinical and early clinical research. In addition to research, review, and hypothesis submissions, The FASEB Journal also seeks perspectives, commentaries, book reviews, and similar content related to the life sciences in its Up Front section.
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