维生素A对于获得是必要的,但对于中枢神经系统自身免疫的表达或进展不是必要的
Reiko Horai1, Ru Zhou1, So Jin Bing1
1Laboratory of Immunology, National Eye Institute, National Institutes of Health, 9000 Rockville Pike, Bethesda, MD 20892, USA.
bioRxiv : the preprint server for biology
|June 10, 2025
概括
维生素A缺乏会影响免疫反应的发展. 然而,在缺陷之前启动的免疫细胞仍然可以发挥作用,这表明尽管T细胞启动受损,但仍然保持了效应器功能.
科学领域:
- 免疫学 免疫学 免疫学
- 这是一种自身免疫力.
- 营养科学 营养科学
背景情况:
- 维生素A (VitA) 和视网酸 (RA) 对免疫反应至关重要.
- 维生素A缺乏 (VAD) 对维持T细胞功能的影响尚不清楚.
- 像紫外炎和脑膜炎这样的自身免疫性疾病是T细胞介导的.
研究的目的:
- 研究VAD对自身免疫性疾病的诱导和进展的影响.
- 为了确定以前获得的效应T细胞功能是否在VAD条件下保持.
- 探索VAD对T细胞原始化和效应器功能的影响.
主要方法:
- 在小鼠模型中通过饮食或RA受体抑制 (BMS493) 诱导VAD.
- 实验性自身免疫性脑膜炎 (EAU) 和脑髓炎 (EAE) 诱导模型.
- 在R161H转基因小鼠中自发性脑膜炎模型.
- 收养转移实验和部分VAD模型.
主要成果:
- VAD小鼠对EAU和EAE诱导表现出耐药性,T细胞反应受损.
- 在VAD条件下,天真T细胞的原始化是有缺陷的.
- 在维生素A充足的条件下进行原始化的效应T细胞在VAD环境中保持功能.
- 在接受VAD饮食的R161H小鼠中,自发性脑膜炎仅适度减弱.
结论:
- 虽然VAD中T细胞原始化受损,但在足够的VitA条件下获得的效应器功能被保持和表达.
- 这些发现凸显了维生素A在免疫调节和自身免疫性方面的复杂作用.
- 这项研究表明,在饮食维生素A有限的地区,对免疫有潜在的影响.
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