代际保护性抗肠共生性免疫球蛋白G起源于生命早期
Brigida Rusconi1, Adina K Bard1, Ryan McDonough1
1Department of Pediatrics, Division of Gastroenterology, Hepatology and Nutrition, Washington University School of Medicine in St. Louis, St. Louis, MO 63110.
母亲免疫球蛋白G (IgG) 抗体通过向生命早期的细菌来保护新生儿免受肠道感染. 这种在婴儿期建立的保护性反应具有持久的代际益处.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 发展生物学 发展生物学
背景情况:
- 母亲免疫球蛋白G (IgG) 抗体对于保护后代免受肠道感染至关重要.
- 这些保护性IgG的精确机制,时间和生成地点仍然不太清楚.
研究的目的:
- 阐明母体IgG抗体对肠道感染的生理生成和保护功能.
- 调查早期肠道微生物群暴露在塑造长期IgG反应中的作用.
主要方法:
- 对成年小鼠循环IgG结合特异性的分析.
- 在肠道中识别和表征IgG分泌的血细胞.
- 对肠道细菌暴露和B细胞在断奶前后的发展进行实验性操纵.
- 评估后代对肠道病原体敏感性的挑战.
主要成果:
- 成年老鼠IgG优先结合早期的肠道共生细菌.
- 针对早期肠道细菌的IgG分泌血细胞在断奶后出现,并持续到成年.
- 在生命早期,但最晚,对肠道细菌或血细胞发育的操纵会影响长期的IgG反应.
- 抗开始性IgG反应的发展与生命早期杯状细胞关联抗原通道 (GAPs) 的存在有关.
- 孕产妇的IgG向转移肠道共生物,而不是肠道病原体,以进行保护.
- 在母体中早期的免疫干扰导致后代对肠道病原体的敏感性增加.
结论:
- 早期的肠道共生细菌暴露对于在肠道中建立终身的IgG分泌血细胞群体至关重要.
- 通过IgG介导的母体对肠道感染的保护依赖于向转移的初生动物,挑战现有的范式.
- 与肠道微生物群相关的早期免疫编程影响了对肠道病原体的代际保护.
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