Key Laboratory of Animal Disease-Resistance Nutrition, Animal Nutrition Institute, Sichuan Agricultural University, Yaan, Sichuan, China, 625014.
Sci Rep. 2017 Jun 12;7(1):3224. doi: 10.1038/s41598-017-03161-6.
Recent metagenomic studies suggest that innate and adaptive immune phenotypes can be programmed via gut microbiota-host interactions mediated via activation of pattern recognition receptors (PRRs) on host cells. In this study, we used two extremely different pig lines (the Yorkshire and the Tibetan) to test the hypothesis that the transplantation of gut microbiota could transfer certain immunologic characteristics from donor to recipient. The faecal microbiota of these two pig lines was transplanted in healthy commercial hybrid newborn piglets to establish the "Tibetan-intervened" and "Yorkshire-intervened" porcine models. Then, acute colitis was induced using dextran sulphate sodium (DSS), which activated Toll-/NOD-like receptor (TLR/NLR) signalling in the colonic tissues of the "Yorkshire-intervened" piglets, leading to increases in pro-inflammatory cytokines and immune cells and causing intestinal injuries. Conversely, DSS administration had little influence on the "Tibetan-intervened" piglets, which showed no significant inflammation and no changes in cytokines, immune cells, or signalling molecules, including TLRs, NLRs, MYD88 and NF-κB, after DSS treatment. These results indicate that pigs inoculated with the Tibetan microbiota acquired relatively strong resistance to experimental colitis, suggesting that the genotype of the host contributes to the uniqueness of its intestinal microbial community, whereas the microbiota plays a vital role in programming the immune phenotypes of the host.
最近的宏基因组研究表明,先天和适应性免疫表型可以通过肠道微生物群与宿主的相互作用来编程,这种相互作用通过宿主细胞上模式识别受体 (PRR) 的激活来介导。在这项研究中,我们使用了两个截然不同的猪种(约克夏猪和藏猪)来检验这样一个假设,即肠道微生物群的移植可以将某些免疫特征从供体转移到受体。这两个猪种的粪便微生物群被移植到健康的商业杂交新生仔猪中,以建立“藏猪干预”和“约克夏猪干预”的猪模型。然后,用葡聚糖硫酸钠(DSS)诱导急性结肠炎,DSS 在“约克夏猪干预”仔猪的结肠组织中激活 Toll/NOD 样受体(TLR/NLR)信号,导致促炎细胞因子和免疫细胞增加,并导致肠道损伤。相反,DSS 处理对“藏猪干预”仔猪几乎没有影响,这些仔猪没有明显的炎症,也没有细胞因子、免疫细胞或信号分子(包括 TLR、NLR、MYD88 和 NF-κB)发生变化。这些结果表明,接种藏猪微生物群的猪获得了对实验性结肠炎的相对较强的抵抗力,这表明宿主的基因型有助于其肠道微生物群落的独特性,而微生物群在编程宿主的免疫表型方面起着至关重要的作用。