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Role of Airway Epithelial Cells in Development of Chronic Obstructive Pulmonary Disease

机译:气道上皮细胞在慢性阻塞性肺疾病发展中的作用

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Chronic obstructive pulmonary disease (COPD) is characterized by airflow limitation of peripheral airways thatis not fully reversible. COPD is associated with airway remodeling, which thickens the airway walls and narrows the airwayas a result. Exposure to cigarette smoke is the major risk factor for this condition. Pathogens including viruses andbacteria may induce COPD exacerbations. Now there is more evidence to suggest a significant relationship between airwayepithelial cells and the pathogenesis of COPD. Airway epithelial cells make up an efficient barrier against pathogensand aggressive molecules. However, after exposure to cigarette smoke and pathogens, epithelial cells are stimulated to releasea variety of pro-inflammatory mediators, including chemokines, cytokines, and growth factors through signalingpathways. These mediators recruit or stimulate other types of cells to induce an increased inflammatory response, productionof mucus, and finally result in airway remodeling. After epithelium injury, epithelial cells participate in the process ofrepair and regeneration to maintain the epithelial integrity. A better understanding of the role of airway epithelial cells inCOPD may be valuable to provide a basis for new therapeutic strategies.
机译:慢性阻塞性肺疾病(COPD)的特征在于外周气道的气流受限,这种情况无法完全逆转。 COPD与气道重塑有关,其使气道壁变厚并因此使气道变窄。接触香烟烟雾是这种情况的主要危险因素。包括病毒和细菌在内的病原体可能会导致COPD恶化。现在,有更多证据表明气道上皮细胞与COPD的发病机制之间存在显着关系。气道上皮细胞构成了抵抗病原体和侵袭性分子的有效屏障。然而,在暴露于香烟烟雾和病原体之后,刺激上皮细胞通过信号通路释放多种促炎性介质,包括趋化因子,细胞因子和生长因子。这些介体募集或刺激其他类型的细胞以诱导增加的炎症反应,粘液产生,并最终导致气道重塑。上皮损伤后,上皮细胞参与修复和再生过程,以维持上皮的完整性。更好地了解气道上皮细胞在COPD中的作用对于为新的治疗策略提供基础可能是有价值的。

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