百氧化素6 保护肺上皮细胞免受慢性阻塞性肺病中与香烟有关的铁亡
Tingting Wei1, Xiaocen Wang1, Ke Lang1
1Department of Pulmonary and Critical Care Medicine, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai, PR China.
Inflammation
|July 2, 2024
概括
百氧化素6 (PRDX6) 保护肺部免受香烟烟雾 (CS) 的损伤. 较低的PRDX6水平通过增加铁亡使慢性阻塞性肺病 (COPD) 恶化,这表明PRDX6是潜在的治疗标.
科学领域:
- 肺部医学 肺部医学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 暴露于香烟烟雾 (CS) 是慢性阻塞性肺部疾病 (COPD) 的主要原因之一.
- 铁,一种受调节的细胞死亡形式,与COPD的发病因子有关.
- 已知过氧化素6 (PRDX6) 可以保护肺上皮细胞免受CS诱导的损伤.
研究的目的:
- 调查Peroxiredoxin 6 (PRDX6) 在慢性阻塞性肺病 (COPD) 发展中的作用.
- 探索PRDX6作为COPD治疗点的潜力.
- 阐明PRDX6影响CS诱导的铁亡的机制.
主要方法:
- 对COPD患者的肺组织和CS刺激细胞中PRDX6表达的分析.
- 研究PRDX6降解途径,包括 lysosomal 途径.
- 在活体和体外实验中使用PRDX6缺乏和过度表达模型进行实验.
- 评估铁灭症标志物 (铁,活性氧物种) 和炎症反应.
- 评价铁化疗法 (德菲洛克萨) 的效果.
主要成果:
- 在COPD肺组织和CS暴露细胞中,PRDX6的表达显著下调.
- 在体内,PRDX6缺乏会加剧肺炎和粘液过分分泌.
- 过度表达PRDX6可以保护Beas-2B细胞免受CS诱导的细胞死亡和炎症.
- 通过增加细胞内铁和反应性氧物种,PRDX6缺乏促进了铁亡.
- 铁化减轻了CS诱导的铁亡,细胞死亡和炎症.
结论:
- 在COPD中,PRDX6对CS诱导的肺损伤和铁亡起着至关重要的保护作用.
- 低调PRDX6有助于COPD通过ferroptosis的致病性.
- 向PRDX6或调节铁代谢是COPD的一种有希望的治疗策略.
相关概念视频
Chronic Obstructive Pulmonary Disease-II: Pathophysiology
2.8K
Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation
Chronic Inflammation
2.8K
Necrosis
4.4K
Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
4.4K
Peroxisomes
11.9K
Peroxisomes are specialized organelles present in fungi, plant, and animal cells. It can vary in number, size, morphology, and activity depending on the type of tissue and the nutritional state of the cell. For example, cells with active lipid metabolism, such as adipocytes, neurons, and hepatocytes, have more peroxisomes than other cells in the body. Besides their primary role in breaking down complex organic molecules, peroxisomes can also synthesize specific macromolecules and participate in...
11.9K
Protein Import into the Peroxisomes
3.5K
Cells contain membrane-bound organelles called peroxisomes that oxidize organic molecules by transferring hydrogen atoms to oxygen, producing hydrogen peroxide. Peroxisomes enzymatically convert the released hydrogen peroxide into water and oxygen.
Peroxisomal Protein Import:
Peroxisomes lack the genetic machinery required to code for their own proteins. Hence, most peroxisomal membrane, lumenal and transmembrane proteins are synthesized in the cytoplasm or ER and transported to the peroxisome...
Peroxisomal Protein Import:
Peroxisomes lack the genetic machinery required to code for their own proteins. Hence, most peroxisomal membrane, lumenal and transmembrane proteins are synthesized in the cytoplasm or ER and transported to the peroxisome...
3.5K
The Electron Transport Chain
16.5K
The electron transport chain or oxidative phosphorylation is an exothermic process in which free energy released during electron transfer reactions is coupled to ATP synthesis. This process is a significant source of energy in aerobic cells, and therefore inhibitors of the electron transport chain can be detrimental to the cell's metabolic processes.
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
16.5K
Oxidation of Phenols to Quinones
3.0K
In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
3.0K


