脂质A的结构多样性调节中性粒细胞蛋白质和分泌体反应
Jose R Pittaluga-Villarreal1, Doeun Kim1, Sung Hwan-Yoon1
1Functional Cellular Networks Section, Laboratory of Immune System Biology, NIAID, NIH, USA.
Journal of proteomics
|March 12, 2026
概括
脂质A乙化显著影响中性粒细胞的激活. 六酸性LPS触发强烈的反应,而四酸性LPS则导致抑制的激活,揭示了先天免疫感应的关键差异.
科学领域:
- 免疫学 免疫学 免疫学
- 蛋白质组学是指蛋白质组学.
- 细胞生物学 细胞生物学
背景情况:
- 中性粒细胞 (PMN) 是具有多种抗微生物功能的关键天生的免疫细胞.
- 通过结构上独特的脂聚糖 (LPS) 来理解中性粒细胞重编程是不完整的.
- 脂质A化是LPS的一个关键结构特征,影响免疫细胞激活.
研究的目的:
- 为了比较人类中性粒细胞蛋白质和分泌体对六氧化大肠杆菌LPS (ECO-LPS) 和四氧化F. tularensisLPS (FT-LPS) 的反应.
- 调查脂质A化在决定中性粒细胞激活的深度和协调中的作用.
- 为了识别与差异性LPS传感相关的蛋白质特征.
主要方法:
- 量化高分辨率蛋白质组学 (DIA-MS) 应用于人类初级中性粒细胞.
- 功能分析和主要成分分析 (PCA) 来评估细胞反应.
- 在LPS刺激后,细胞内蛋白质组和分泌组动态的比较.
主要成果:
- 捐赠者之间的变化是中性粒细胞反应变化的主要来源.
- ECO-LPS诱导了显著的蛋白质组重塑,包括L-选择蛋白的损失,颗粒蛋白的枯竭,以及炎症蛋白的增加.
- FT-LPS引发了有限的蛋白质组变化,微妙的分泌反应表明抑制激活,而PMN与蛋白质组水平的对照无法区分.
- 经过ECO-LPS治疗,秘密体中的脱粒成分得到了丰富,与细胞内枯竭相关.
- FT-LPS显示出最小的分泌变化,表明缺乏协调的细胞内重塑.
结论:
- 脂质A化是中性粒细胞激活状态和反应大小的关键决定因素.
- 六氧化LPS驱动协调中性粒细胞效应器功能,而四氧化LPS则导致抑制激活.
- 这项研究为了解差异性LPS感应和针对中性粒细胞反应的潜在治疗策略提供了蛋白质学资源.
关键词:
独立于数据的获取 (DIA)Degranulation 是一种降粒的方法.埃舍里希亚大肠杆菌 (Escherichia coli) 是一个大肠杆菌.弗朗西塞拉 (Francisella tularensis) 是一种的植物.天生的免疫反应.脂质A的乙化脂聚糖化物 (LPS) 是一种中性粒细胞中性粒细胞.多态核细胞中性粒细胞 (PMN)量化蛋白质组学是一种定量化的蛋白质组学.一个秘密,一个秘密.更多相关视频
10:58Methods to Study Lipid Alterations in Neutrophils and the Subsequent Formation of Neutrophil Extracellular Traps
Published on: March 29, 2017
10.0K
10:59Enrichment of Bacterial Lipoproteins and Preparation of N-terminal Lipopeptides for Structural Determination by Mass Spectrometry
Published on: May 21, 2018
9.4K
相关概念视频
Formation of Lipopolysaccharides
863
Lipopolysaccharides (LPS) are crucial components of the outer membrane of Gram-negative bacteria, serving both structural and functional roles. It contributes to membrane stability and protects bacteria from host immune responses. LPS is composed of three major regions—lipid A, a core oligosaccharide, and an O antigen. The biosynthesis and assembly of LPS involve a highly coordinated set of enzymatic reactions and transport mechanisms. Additionally, LPS is recognized as an endotoxin,...
863
Biosynthesis of Lipids
819
Microbial membranes exhibit remarkable diversity in lipid composition, reflecting evolutionary adaptations to various environmental conditions. The three domains of life—Bacteria, Archaea, and Eukarya—synthesize membrane lipids through distinct biosynthetic pathways, leading to fundamental structural differences that impact membrane stability, function, and adaptability.Fatty Acid-Based Lipids in Bacteria and EukaryaBacteria and eukaryotes share a common fatty acid biosynthesis...
819
Membrane Domains
8.0K
The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the...
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the...
8.0K
Asymmetric Lipid Bilayer
10.7K
Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...
10.7K
Lipid-derived Compounds in the Human Body
7.3K
Fats and lipids are crucial components in the human body. Some lipid-derived compounds, such as fat-soluble vitamins, eicosanoids, lipoproteins, and glycolipids, also play unique roles to support various biological processes .
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin,...
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin,...
7.3K
