p62通过其在细胞信号传递中的作用限制了巨细胞中的沙门氏菌
Daniel Underwood1, Arda Balci2, Virtu Solano-Collado1
1School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen, UK.
Access microbiology
|January 26, 2026
概括
自受体p62限制了沙门氏菌在巨细胞中的生存,而不依赖于Rab32/BLOC-3通路. 缺乏P62的巨细胞显示细菌负荷增加和炎症反应减弱,揭示了它们在宿主防御中的新角色.
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:
- 自受体p62 (Sequestosome-1) 影响免疫反应,但其控制细胞内细菌的作用尚不清楚,比如在巨细胞内控制沙门氏菌 (Salmonella Typhimurium (S. Tm)).
- 之前的工作将巨细胞中S.Tm的宿主限制与GTPase Rab32和BLOC-3复合物联系起来.
研究的目的:
- 研究p62在限制细胞内细菌生存的特定功能,特别是S. Tm,在巨细胞中.
- 在沙门氏菌感染的背景下阐明p62,Rab32和BLOC-3复合体之间的关系.
主要方法:
- 确定了p62和Rab32.3之间的新相互作用.
- 在巨细胞中利用p62-knockdown并评估细胞内细菌存活率.
- 通过光显微镜检查了与自相关的蛋白质的招募.
- 使用实时聚合酶连锁反应 (RT-qPCR) 和感染检测测量的量化促炎反应.
主要成果:
- p62限制了沙门氏菌的存活能力,而不依赖于Rab32/BLOC-3通路.
- p62 knockdown显著增加了巨细胞中的细胞内S. Tm存活率.
- 增加的细菌存活率与改变的正规自蛋白招募没有相关性.
- 缺乏p62的巨细胞表现出抑制的促炎反应,与较高的细菌负载相关.
结论:
- p62在限制巨细胞内的细胞内沙门氏菌生存方面发挥着至关重要的作用.
- 在沙门氏菌感染期间,p62调节巨细胞的炎症反应.
- 这项研究强调了p62对宿主防御的贡献,超出了它在自中的既定作用.
相关概念视频
Role Of Notch Signalling In Intestinal Stem Cell Renewal
2.5K
Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
2.5K
Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal
2.7K
Erythropoietin-producing hepatocellular carcinoma receptor (Eph) and its ligand, Eph receptor-interacting protein (Ephrin) were first discovered in the human carcinoma cell line, hence the name. Ephrin-Eph interaction guides cells to reach their appropriate location in adult tissues. They also play an essential role in the immune system by helping in immune cell migration, adhesion, and activation. Based on their structure and function, Eph is divided into two classes — EphA and EphB.
2.7K
What is Cell Signaling?
130.3K
Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate to respond to the environment.
130.3K
Limiting Reactant
69.9K
The relative amounts of reactants and products represented in a balanced chemical equation are often referred to as stoichiometric amounts. However, in reality, the reactants are not always present in the stoichiometric amounts indicated by the balanced equation.
69.9K
Cell-surface Signaling
54.2K
Hormones—or any molecule that binds to a receptor, known as a ligand—that are lipid-insoluble (water-soluble) are not able to diffuse across the cell membrane. In order to be able to affect a cell without entering it, these hormones bind to receptors on the cell membrane. When a first messenger, a hormone, binds to a receptor, a signal cascade is set off, causing second messengers, proteins inside the cell, to become activated, resulting in downstream effects.
54.2K
The Number e as a Limit
75
The number e is a fundamental constant in calculus, playing a central role in describing continuous change, particularly exponential growth. It is most naturally defined through its relationship with the natural logarithm, which is the inverse of the exponential function with base e. This relationship allows e to be characterized using basic principles of differentiation rather than as an arbitrary numerical constant.A key property of the natural logarithm function, ln x, is that its derivative...
75


