患有高血清粉样蛋白A的喘患者具有预炎性HDL:对增强的全身和呼吸道炎症的影响
Xianglan Yao1, Maryann Kaler1, Xuan Qu1
1Laboratory of Asthma and Lung Inflammation, Pulmonary Branch, National Heart, Lung, and Blood Institute, Bethesda, Md.
在喘患者中,与HDL结合的血清粉样蛋白A (SAA) 的高水平与疾病严重程度和炎症的增加相关. 这种富含SAA的HDL具有炎症作用,这表明它在增加喘严重程度方面发挥了作用.
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
- 生物化学 生化学
背景情况:
- 血清粉样蛋白A (SAA) 与循环中的高密度脂蛋白 (HDL) 有关.
- 在喘患者中观察到高SAA水平,但它们对疾病严重程度的影响尚不清楚.
研究的目的:
- 为了表征具有高SAA水平的喘患者.
- 为了确定这些患者的HDL是否有炎症性,并有助于喘严重程度.
主要方法:
- 使用ELISA在喘患者和对照中量化SAA水平.
- 从高SAA喘患者中分离的HDL刺激人类单细胞.
- 向BALB/c小鼠静脉注射HDL,以评估炎症反应.
主要成果:
- 在SAA水平≥108.8μg/mL的情况下,11%的喘患者被确定为SAA高.
- 高SAA喘患者表现出较高的C反应蛋白,IL-6,TNF-α,肥胖和严重的喘.
- 高SAA高HDL诱导单细胞通过特定的信号通路分泌IL-6,IL-1β,TNF-α.
- 在小鼠中,SAA高的HDL引起了全身炎症和放大了呼吸道炎症.
结论:
- 高SAA水平的喘患者表现为全身炎症,老年,肥胖和严重疾病.
- 来自SAA高喘患者的HDL是炎症前的.
- 在小鼠中,SAA高的HDL给药诱导了全身和呼吸道炎症,这表明它增加了喘的严重程度.
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