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溶性E-卡德林有助于严重喘的气道炎症
Haixiong Tang1, Zemin Chen1, Sudan Gan2
1Department of Allergy and Clinical Immunology, State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China.
溶性E-cadherin (sE-cadherin) 在严重的喘中升高,通过依赖ERK的通路导致呼吸道炎症. 中和sE-cadherin在小鼠模型中减少了炎症,这表明严重喘的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 呼吸系统医学 呼吸系统医学
- 细胞生物学 细胞生物学
背景情况:
- 严重的喘的特点是呼吸道上皮质屏障功能受损,E-cadherin表达减少.
- 细胞粘附分子E-cadherin可以分裂成可溶性E-cadherin (sE-cadherin),这是一种潜在的生物标志物和媒介.
研究的目的:
- 调查SE-cadherin在严重喘病变中的作用.
- 探索涉及sE-cadherin的潜在的促炎机制.
主要方法:
- 分析了来自健康受试者和喘患者的唾液样本.
- 用二酸 (TDI) 或卵胺 (OVA) /完整的弗洛恩德辅助剂 (CFA) 诱导严重喘的小鼠模型.
- 中和抗体DECMA-1,重组SE-cadherin和ERK信号抑制剂在体内和体外使用.
主要成果:
- 喘患者表现出明显更高的唾液sE-cadherin水平,与HMGB1和葡萄糖皮质激素剂量相关.
- 过敏原暴露增加了小鼠支气管支气管支气管洗液中的SE-cadherin.
- 在小鼠中,DECMA-1治疗减轻了气道炎症和高反应性.
- 再组合的sE-cadherin诱导了巨细胞中的VEGF表达,并增加了小鼠的呼吸道炎症 (中性粒细胞,乙氨基粒细胞) 和细胞因子释放 (VEGF,IL-6),由ERK信号传递介导.
结论:
- 升高的sE-cadherin与严重的喘有关,并导致呼吸道炎症.
- sE-cadherin通过涉及VEGF和IL-6的ERK依赖途径促进炎症.
- 准sE-cadherin可能为严重喘提供一种新的治疗策略.
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