骨髓细胞NCOA4隔离器KEAP1以减少铁死,以保护小鼠免受沙门氏菌感染
Mariella Arcos1, Zhaoli Liu1, Luke B Villareal1
1Department of Biochemistry and Molecular Biology, University of New Mexico, Albuquerque, NM 87131.
Research square
|May 27, 2024
概括
核受体共激活剂4 (NCOA4) 缺乏在骨髓细胞恶化沙门氏菌感染,增加铁和氧化应激. 恢复NCOA4或激活NRF2可以防止沙门氏菌引起的结肠炎.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 微生物学 微生物学
背景情况:
- 沙门氏菌病是一个全球性的健康问题.
- 矛盾的是,宿主免疫的铁调节可以帮助沙门氏菌的生存.
- 核受体协活性剂4 (NCOA4) 在沙门氏菌病中的作用尚不清楚.
研究的目的:
- 调查骨髓体NCOA4在沙门氏菌Typhimurium感染中的作用.
- 阐明连接NCOA4,铁代谢,氧化应激和NRF2信号的分子机制.
- 在沙门氏病中探索针对NCOA4的治疗策略.
主要方法:
- 生成髓状腺特异性NCOA4淘汰和过度表达的小鼠模型.
- 巨细胞和小鼠感染沙门氏菌 Typhimurium.
- 评估铁含量,氧化应激,铁亡以及NRF2/KEAP1通路的激活.
- 治疗药物 (Tempol,黄素) 和饮食干预措施 (低铁饮食) 的使用.
主要成果:
- 骨髓体NCOA4缺乏增加了脏的铁,巨细胞的铁积累,氧化应激和铁.
- NCOA4缺乏症加剧了沙门氏菌诱导的大肠炎.
- NCOA4直接与KEAP1结合,稳定NRF2并抑制氧化应激.
- NRF2激活,抗氧化剂治疗,铁灭抑制和NCOA4过度表达保护大肠炎.
结论:
- 骨髓体NCOA4通过NCOA4/KEAP1/NRF2通路调节铁的稳态和氧化应激,在沙门氏病中起着关键的保护作用.
- 针对NCOA4/KEAP1/NRF2轴和ferroptosis为沙门氏菌病提供了一个有希望的治疗途径.
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