帕内特细胞作为肠道炎症的起源地
Timon E Adolph1, Michal F Tomczak, Lukas Niederreiter
11] Division of Gastroenterology and Hepatology, Department of Medicine, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 0QQ, UK [2].
Nature
|October 4, 2013
概括
肠上皮细胞中的自和未折叠蛋白质反应 (UPR) 途径对于预防克罗恩病至关重要. 两者的损害导致严重的乳头炎,突出显示了疾病发展中的帕内斯细胞功能障碍.
科学领域:
- 胃肠病学 胃肠病学
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 与自相关的16样1 (ATG16L1) 是克罗恩病的遗传风险因素,影响帕内斯细胞功能.
- 展开蛋白质反应 (UPR) 转录因子X盒结合蛋白-1 (Xbp1) 变体与炎症性肠病有关.
- 在炎症性肠病中,未解决的内等质网膜 (ER) 应激和帕内斯细胞功能障碍是常见的.
研究的目的:
- 在克罗恩病的背景下,研究肠上皮细胞中自和UPR之间的相互作用.
- 阐明ATG16L1和Xbp1功能障碍导致阴茎炎的机制.
- 确定帕内斯细胞在ER压力诱导的肠炎中的作用.
主要方法:
- 使用小鼠模型对肠道上皮细胞中自基因 (Atg16l1,Atg7) 或UPR基因 (Xbp1) 进行有针对性的删除.
- 分析了帕内斯细胞功能,ER压力标志物,自细胞形成和炎症信号通路.
- 评估了共生微生物群对疾病发展的影响.
主要成果:
- 肠上皮细胞中UPR或自的损伤导致了另一条途径的补偿性参与.
- 在UPR和自的联合缺乏导致严重的自发性克罗恩氏病类型的转移性脑膜炎.
- 帕内斯细胞中的Xbp1缺失诱导了ER压力,自和自发性依赖微生物群的乳房炎.
结论:
- 自和UPR通路对于维持肠道平衡和预防胆管炎至关重要.
- ATG16L1抑制了IRE1α的活动,增强的自改善了ER压力诱导的炎症.
- 伊利亚克罗恩病可能代表帕内斯细胞的特定疾病,涉及失调的UPR和自.
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