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免疫抑制性CD71+红色素细胞损害新生儿对感染的宿主防御能力
Shokrollah Elahi1, James M Ertelt, Jeremy M Kinder
1Division of Infectious Diseases and Perinatal Institute, Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue, Cincinnati, Ohio 45229, USA.
Nature
|November 8, 2013
概括
新生儿新生儿的新生儿
科学领域:
- 免疫学 免疫学 免疫学
- 新生儿发育的新生儿发展
- 主机的防御机制 主机的防御机制
背景情况:
- 新生儿对感染的易感性增加.
- 免疫细胞不成熟是新生儿免疫力受损的主要解释.
- 免疫反应的变化需要对新生儿低反应的统一解释.
研究的目的:
- 为了研究CD71的免疫抑制性质(+) 新生儿的红色素细胞.
- 阐明阿尔金酶-2在新生儿免疫抑制中的作用.
- 了解CD71 ((+) 细胞在感染易感性和保护方面的双重功能.
主要方法:
- 成人和新生儿免疫细胞的共同培养.
- 成人细胞转移到新生小鼠中.
- 分子抑制阿尔金酶-2和L-阿尔金因补充剂.
- 在新生小鼠中消去CD71 (((+) 细胞.
- 在没有细菌和用抗菌素治疗的小鼠身上进行的研究.
主要成果:
- 新生儿的生理上富含的CD71 (((+) 红色素细胞具有明显的免疫抑制特性.
- 新生儿CD71 ((+) 细胞表达酶-2,对免疫抑制至关重要;其抑制或L-氨酸补充可以逆转这种效应.
- 新生儿中CD71 (((+) 细胞的切除或减少与免疫抑制的降低和对Listeria monocytogenes和Escherichia coli等病原体的抗性增加有关.
- CD71 ((+) 细胞可以防止因分娩后开始的微生物殖民造成的过度肠道炎症.
结论:
- 新生儿对感染的敏感性可能不仅仅源于固有的免疫细胞缺陷.
- CD71(+) 红色素细胞在平衡新生儿的免疫反应中发挥着至关重要的作用,减轻微生物殖民造成的炎症.
- 这些发现表明新生儿在发育过程中需要免疫抑制,这会影响增强宿主防御的策略.
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