表皮双氧化酶2塑造粘膜微生物组,并有助于炎症易感性
Juan Camilo Castrillón-Betancur1, Víctor Alonso López-Agudelo1, Nina Sommer1
1Institute of Clinical Molecular Biology, University of Kiel, Rosalind-Franklin-Straße 12, 24105 Kiel, Germany.
Antioxidants (Basel, Switzerland)
|October 28, 2023
概括
皮质双氧化酶2 (DUOX2) 调节肠道平衡和微生物组相互作用. 缺少DUOX2的条件淘汰小鼠受到大肠炎的保护,这表明DUOX2具有保护作用.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 胃肠病学 胃肠病学
背景情况:
- 反应性氧物种 (ROS) 是关键的细胞信号分子,在宿主防御和潜在损伤方面具有双重作用.
- 双氧化酶2 (DUOX2) 是一种关键的酶,在肠道中产生ROS,受肠道微生物群的影响,对病原体防御至关重要.
- 系统性删除模型使DUOX2的特定功能分析变得复杂,因为它在各个器官中扮演着不同的角色.
研究的目的:
- 调查表皮DUOX2在维持肠道平衡和宿主微生物群相互作用中的特定作用.
- 分析在肠道上皮细胞中具有条件DUOX2删除的小鼠的免疫表型和微生物组合.
- 评估这些小鼠对炎症状况的易感性,特别是德克斯硫酸盐 (DSS) 诱导的大肠炎.
主要方法:
- 产生条件的Duox2∆IEC小鼠,这些小鼠在肠道上皮细胞中仅缺少DUOX2.
- 在无挑战和有挑战的条件下分析肠粘膜免疫表型和微生物组合.
- 使用DSS结肠炎模型评估炎症易感性,并研究人类肠炎患者的DUOX2-微生物组相互作用.
主要成果:
- 条件Duox2∆IEC小鼠在正常条件下表现出降低的上皮ROS产量和改变的微生物组合,没有明显的表型变化.
- 这些小鼠对DSS诱导的大肠炎表现出显著的保护,这与抑制ROS介导的损伤和增强的上皮再生有关.
- 患有肠道炎症的人类患者在炎症组织中增加了DUOX2表达,高的DUOX2水平与不良生物微生物组相关.
结论:
- DUOX2与肠道微生物组之间的双向相互作用对于粘膜平衡至关重要.
- 对DUOX2-微生物组轴的调节失调有助于肠道炎症的发展.
- 准这一轴为治疗肠道炎症疾病提供了潜在的治疗策略.
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