电球细胞将上皮层的营养感应与ILC2-细胞电路的放大联系起来
bioRxiv : the preprint server for biology
|October 28, 2024
概括
食激活肠道第2组先天性淋巴细胞 (ILC2s) 通过专门纤维细胞的TSLP继电器. 这一途径增强了对摄入营养素的免疫监测.
科学领域:
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
- 细胞生物学 细胞生物学
背景情况:
- 2组先天性淋巴细胞 (ILC2s) 是2型免疫的关键参与者,特别是在小肠中.
- 在基底生理过程中ILC2激活的精确机制仍然不完全理解.
研究的目的:
- 阐明肠道纤维细胞和特定信号通路在营养摄入后ILC2激活中的作用.
- 在养的背景下,研究上皮细胞,纤维细胞和ILC2之间的通信网络.
主要方法:
- 在肠道侧层细胞中研究了胸膜侧层淋巴蛋白 (TSLP) 的构成性和食诱导的表达.
- 利用遗传删除模型来评估TSLP及其受体在ILC2激活中的必要性.
- 研究了葡萄糖类-2 (GLP-2) 受体在肠道前细胞上的表达,以及GLP-2的作用.
主要成果:
- TSLP是由状特洛细胞和密码相关的特洛细胞构成性表达的,这些特洛细胞是PDGFRα+ stromal细胞.
- 食会增加TSLP的产生,从而增加ILC2的激活和2型细胞因子的释放.
- 在PDGFRα+细胞或其ILC2s上的受体中删除TSLP会减弱这种反应.
- 肠道特洛细胞表达GLP-2受体;GLP-2的使用诱导TSLP,促进ILC2细胞因子的产生,并导致细胞增生.
结论:
- 一个新的信号继电器存在,其中肠内分泌细胞 (EECs) 检测营养物质并释放GLP-2,刺激小细胞产生TSLP.
- 然后,这种TSLP激活ILC2s,放大细胞对摄入物质的化学传感反应.
- 这一途径突出显示了一种机制,将营养感应与肠道中的免疫监测相结合.
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