Prognostic value of secretory autophagosomes in patients with acute respiratory distress syndrome

Biomarker Research

Correspondence

Wei Huang¹  Xing-xing Zhu¹  Yi Yang¹  Yue-ru Huang¹  Ling Liu¹  Xin-yi Xu¹  Xue-cheng Dong² 

[1] Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, 210009, Nanjing, Jiangsu, China;Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, 210009, Nanjing, Jiangsu, China;Department of Critical Care Medicine, Zhejiang Hospital, 310013, Hangzhou, Zhejiang, China;

关键词: ARDS;    Extracellular vesicles;    Secretory autophagosomes;    Liquid biopsy;    Biomarker;   

DOI  :  10.1186/s40364-023-00519-z

 received in 2023-06-19, accepted in 2023-08-29,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundGrowing evidence supports that extracellular vesicles (EVs) in blood plasma and other body fluids may function as biomarkers for disease. We previously found that secretory autophagosomes (SAPs), a kind of EV, could exacerbate lung injury in mice. However, the clinical value of SAPs in acute respiratory distress syndrome (ARDS), the most severe form of lung injury, remains unknown. Our study investigated the prognostic value of secretory autophagosomes in ARDS.MethodsARDS patients (n = 46) and controls (n = 8) were included in a prospective monocentric study. Bronchoalveolar lavage fluid (BALF) samples were collected from ARDS patients on the first day (Day 1) or the third day (Day 3) of enrollment and were collected from controls on Day 1. Gradient centrifugation was performed to isolate EVs. The size and concentration of EVs were characterized by nanoparticle tracking analysis (NTA). SAPs in EVs were characterized by flow cytometry, transmission electron microscopy, and western blot analysis, and the proportion of SAPs in EVs (PSV) was measured by flow cytometry. The association of SAPs with 28-day mortality was assessed.ResultsOn Days 1 and 3, the proportion of SAPs (SAPs%) in BALF was higher in patients with ARDS than in controls. On Day 3, the SAPs% was significantly higher in nonsurvivors than in survivors. In particular, a high SAPs% was associated with poor overall survival in ARDS patients. Furthermore, the combination of SAPs% and SOFA obtained a higher predictive value of ARDS outcome than PSV or SOFA alone.ConclusionSAPs% in BALF is elevated in patients with ARDS and is associated with the risk of death in ARDS, suggesting that SAPs% may be a novel prognostic biomarker in ARDS.

【 授权许可】

CC BY   
© Yumed Inc. and BioMed Central Ltd., part of Springer Nature 2023

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