IBD:粪便中的IgA水平和肠道菌群组成受NK-T细胞的调节

2020-04-12 MedSci原创 MedSci原创

肠道菌群是支持宿主体内稳态和免疫系统发育的关键因素。微生物群与免疫力之间的关系是很复杂,其中微生物群有助于免疫细胞的发育,同时免疫力会影响微生物的组成。

背景:肠道菌群是支持宿主体内稳态和免疫系统发育的关键因素。微生物群与免疫力之间的关系是很复杂,其中微生物群有助于免疫细胞的发育,同时免疫力会影响微生物的组成。在这种情况下,天然杀伤性T细胞(NKT细胞)是不同的T淋巴细胞,它们在肠道免疫中起作用,并受到肠道微生物的影响。在本项研究中研究人员对NKT细胞(iNKT)与肠道稳态的关系进行了相关研究。

结果:研究人员发现iNKT缺陷型小鼠(iNKT-KO)的粪便IgA水平降低,肠道菌群组成发生变化,拟杆菌的数量增加。iNKT细胞的缺失也影响了TGF-β1水平和浆细胞,在敲除(KO)小鼠中,这些水平显着降低。此外,与野生型(WT)小鼠相比,当接受葡聚糖硫酸钠结肠炎治疗时,iNKT-KO小鼠的结肠炎进一步恶化。为了进一步明确iNKT细胞对肠道动态平衡的影响,研究人员将iNKT细胞过继转移到KO小鼠中,然后将它们转入结肠炎阶段。iNKT细胞的转移改善了结肠炎并恢复了粪便IgA水平和肠道菌群。

结论:本项研究表明肠道NKT细胞是肠道稳态的重要调节剂,肠道菌群组成可能是炎症性肠病治疗的潜在靶标。

原始出处:

Cristhiane Favero de Aguiar. Et al. Fecal IgA Levels and Gut Microbiota Composition Are Regulated by Invariant Natural Killer T Cells. Inflammatory Bowel Diseases.2020.

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    2020-04-14 bnurmamat
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    2020-04-14 yibei

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