代谢印记在粘膜真菌感染期间驱动上皮记忆
Jinendiran Sekar1,2, Norma V Solis1,2, Jian Miao1,2
1Division of Infectious Diseases, Harbor-UCLA Medical Center, Torrance, CA, USA.
bioRxiv : the preprint server for biology
|August 12, 2025
概括
口腔上皮细胞对真菌感染产生训练有素的免疫力. 这种记忆依赖于普罗林代谢,而不是适应性免疫,增强粘膜防御.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 代谢途径 代谢途径
背景情况:
- 表皮细胞是天生的免疫的关键,但它们的记忆机制是未知的.
- 训练有素的免疫能增强对病原体的反应,但其在上皮细胞中的作用尚不清楚.
研究的目的:
- 研究口腔上皮细胞对真菌感染的训练免疫力.
- 阐明表皮免疫记忆的代谢和表观遗传驱动因素.
主要方法:
- 使用了一种口腔候群病的小鼠模型.
- 分析了表皮细胞中的代谢途径 (类代谢,脂肪酸氧化) 和表皮细胞中的表观遗传重塑.
- 评估免疫记忆独立于适应性免疫和髓状细胞.
主要成果:
- 粘膜暴露于Candida albicans诱导了口腔上皮细胞中持续的保护性记忆.
- 这种记忆是由proline脱酶 (Prodh) 的proline代谢驱动的,维持线粒体功能和细胞因子的产生.
- 表皮记忆独立于糖解,但部分依赖于脂肪酸氧化 (CPT1).
结论:
- 在口腔上皮细胞中发现了一种新型的训练免疫力.
- 鉴定出一种代谢-表观遗传轴 (proline catabolism) 作为表皮免疫记忆的基础.
- 揭示了针对真菌病原体的粘膜防御的非血液构造机制.
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