脂质液滴限制了在抗真菌免疫中发酵体的形成
Wanwei Sun1,2, Han Wu1,2, Guimin Zhao1,2
1Key Laboratory of Infection and Immunity of Shandong Province & Key Laboratory for Experimental Teratology of Ministry of Education, Shandong University, Jinan, Shandong, 250012, P. R. China.
Cellular & molecular immunology
|April 8, 2025
概括
脂质滴 (LDs) 限制了细胞形成,保护巨细胞免受真菌感染死亡. 通过atglistatin抑制ATGL,在患有Candida albicans感染的小鼠中改善了结果.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 传染性疾病 传染性疾病
背景情况:
- 脂质滴 (LDs) 是细胞内有机体,参与细胞脂质代谢.
- 在巨细胞吸收病原体时,LD与细胞相互作用,但它们的功能作用尚不清楚.
- 了解LDs在细胞分裂中的作用对于开发新的抗感染策略至关重要.
研究的目的:
- 为了研究脂质滴 (LDs) 在菌感染期间调节菌体形成的功能.
- 阐明LDs影响巨细胞对病原体反应的分子机制.
- 评估针对系统性真菌感染中LDs的治疗潜力.
主要方法:
- 在巨细胞中利用真菌感染模型 (Candida albicans) 来研究LD和体动力学.
- 研究了LD积累对细胞成熟和巨细胞活力的影响.
- 分析了内等质网膜膜动力学,RAC1转位和GTPase活性,以应对LD的形成.
- 在患有巨细胞缺陷的小鼠中评估宿主敏感性,并评估ATGL抑制剂 (atglistatin) 的疗效.
主要成果:
- 发现LD积累限制了细胞形成,并保护巨细胞在真菌吞过程中免受细胞死亡.
- 从机理上讲,LD的形成与内细胞网膜竞争,并改变了RAC1的信号传递,限制了胞体的发育.
- 患有Hilpda缺陷巨细胞的小鼠对致命的Candida albicans感染的易感性增加.
- 用ATGL抑制剂atglistatin治疗改善了在传播性真菌感染中宿主存活率.
结论:
- 脂质滴在调节体形成和预防真菌感染期间免疫细胞死亡方面发挥着至关重要的作用.
- 这项研究揭示了一种涉及LDs,内分泌网膜和RAC1的新机制,用于控制巨的抗真菌反应.
- 针对LD代谢,特别是通过ATGL抑制,为治疗系统性Candida albicans感染提供了一个有前途的治疗策略.
相关概念视频
Phagocytosis of Apoptotic Cells
3.1K
Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or immature dendritic cells. Non-professional phagocytes such as epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes.
Normal cells contain receptors that prevent them from being recognized...
Normal cells contain receptors that prevent them from being recognized...
3.1K
Immune Surveillance by NK Cells and Phagocytes
954
Immune surveillance is an integral part of the innate immune system, involving the continuous monitoring of peripheral tissues to detect and respond to pathogens, infected cells, or cancerous cells. This surveillance is conducted primarily by natural killer (NK) cells and phagocytes, which employ distinct but complementary mechanisms to identify and eliminate threats.
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
954


