微生物群调节免疫细胞种群,并推动肠关联淋巴组织的动态结构变化
Pačes Jan1, Malinská Nikola1, Tušková Liliana1
1Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic.
Gut microbes
|August 13, 2025
概括
微生物群显著影响肠关联淋巴组织 (GALT) 的发展和小鼠的免疫细胞分布. 标准化微生物群可以提高动物研究中的实验可再生性.
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:
- 杂交小鼠提供同质性,但由于环境和发育因素而表现出变异性,影响实验可复制性.
- 肠关联淋巴组织 (GALT) 的发育和功能受到肠道微生物群的影响.
- 了解GALT中微生物群诱导的变化对于改善研究中的小鼠模型至关重要.
研究的目的:
- 研究微生物群对小鼠肠关联淋巴组织 (GALT) 发育和细胞组成的影响.
- 量化抗原呈现细胞 (APC) 和淋巴体结构在无菌,常规殖民和最小殖民小鼠模型中的差异.
- 评估定义的最小微生物群 (oMM12) 在标准化GALT开发中的作用,以提高实验可重复性.
主要方法:
- 使用显微镜和细胞测量技术分析了MHC II-EGFP试验小鼠中的GALT.
- 无菌 (GF),常规 (CV) 和oMM12殖民小鼠的比较.
- 在各种GALT隔间的抗原呈现细胞 (APC) 的量化,包括自身膜,加密贴片 (CP),隔离淋巴卵泡 (ILF),皮耶尔贴片 (PP) 和中腔淋巴复合体.
主要成果:
- 与传统殖民和oMM12殖民的小鼠相比,无细菌小鼠的肠道表面积更大,但毛密度较低,自身膜中APC较少.
- 孤独肠道淋巴组织 (SILT) 的体积在GF小鼠中显着较小.
- 皮耶尔贴片 (PPs) 和皮贴片在GF,oMM12和CV小鼠之间显示出明显的形态和细胞差异,GF小鼠的PP毛囊较小,PPs中的pDC较少.
结论:
- 微生物群在调节SILT的分化,PPs的大小和形态,中腔淋巴结 (MLNs) 细胞性和皮贴片形态方面发挥着至关重要的作用.
- 微生物群直接影响免疫系统的功能配置和淋巴细胞结构的分化.
- 标准化微生物群,如oMM12,可以通过使微生物学控制的实验显著提高动物研究中的可复制性.
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