在中性粒细胞中由骨髓氧化酶形成由氧化衍生的炎症氧化剂
相关实验视频
Updated: Aug 10, 2026

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In vivo Imaging Method to Distinguish Acute and Chronic Inflammation
Published on: August 16, 2013
J P Eiserich1, M Hristova, C E Cross
1Department of Internal Medicine, University of California, Davis 95616, USA. jason.eiserich@ccc.uab.edu
Nature
|February 5, 1998
概括
亚酸盐 (NO2-) 通过在中性粒细胞中通过骨髓氧化酶形成反应性物种,促进炎症. 这一过程导致铁酸和化,影响细胞功能,并可能导致体内氧化损伤.
科学领域:
- 生物化学 生物化学
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 氧化 (.NO) 与炎症和传染病有关.
- 过氧化 (ONOO-),由.NO和超氧化物形成,是.NO毒性的疑似调解者.
- 在体内ONOO-活性的证据通常依赖于检测3-甲.
研究的目的:
- 研究酸盐 (NO2-) 在炎症过程中的作用.
- 阐明NO2-促进铁酸的机制.
- 为了确定多态核中性粒细胞 (PMNs) 是否介导NO2-依赖的化.
主要方法:
- 研究了NO2-与低酸 (HOCl) 或髓氧化酶 (MPO) 的反应.
- 研究了被激活的人类PMN的NO2-转化为化 (NO2Cl) 和二氧化 (.NO2).
- 使用15N标记的NO2和对血管酶转化酶 (ACE) 活性的评估影响进行量化的铁酸和化.
主要成果:
- 激活的人类PMN通过MPO依赖的途径将NO2-转化为NO2Cl和.NO2.
- 通过PMN介导的化和化氨酸残留物被NO2-和.NO.增强了.
- 15NO2-证实其在PMN介导的化中的作用,并且NO2-加剧了PMN介导的内皮细胞ACE的失活.
结论:
- NO2-可以通过涉及PMN的氧化机制调节炎症过程.
- 由PMN衍生出的NO2Cl和NO2有助于氨酸化和化.
- 这些途径可以解释在炎症条件下对氨酸和的体内观察.
相关概念视频
Inflammation
Overview
2° Amines to N-Nitrosamines: Reaction with NaNO2
Secondary amines react with nitrous acid to form N-nitrosamines, as depicted in Figure 1. Nitrous acid, a weak and unstable acid, is formed in situ from an aqueous solution of sodium nitrite and strong acids, such as hydrochloric acid or sulfuric acid, in cold conditions. In the presence of an acid, the nitrous acid gets protonated. The subsequent loss of water results in the formation of the electrophile known as nitrosonium ion.
Nitric Oxide Signaling Pathway
Nitric oxide (NO), an inorganic gas, acts as a potent second messenger in most animal and plant tissues. NO diffuses out of the cells that produce it and enters the neighboring cells to generate a downstream response. NO synthase (NOS) catalyzes NO production by the deamination of the amino acid arginine. There are three isoforms of NOS. Endothelial cells have endothelial NOS (eNOS), nerve and muscle cells have neuronal NOS (nNOS), and macrophages produce inducible NOS (iNOS) upon exposure to...
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Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
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The cellular phase of acute inflammation is a tightly orchestrated sequence of events that recruits leukocytes, primarily neutrophils, to sites of tissue injury or infection. Following the initial vascular changes, this phase ensures effective immune cell migration, activation, and function at the affected site to eliminate pathogens and initiate tissue repair.Leukocyte Recruitment CascadeLeukocyte recruitment happens in four steps: margination, adhesion, transmigration, and chemotaxis. Reduced...

