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Alveolar compartmentalization of inflammatory and immune cell biomarkers in pneumonia-related ARDS.


ABSTRACT:

Background

Biomarkers of disease severity might help individualizing the management of patients with the acute respiratory distress syndrome (ARDS). Whether the alveolar compartmentalization of biomarkers has a clinical significance in patients with pneumonia-related ARDS is unknown. This study aimed at assessing the interrelation of ARDS/sepsis biomarkers in the alveolar and blood compartments and explored their association with clinical outcomes.

Methods

Immunocompetent patients with pneumonia-related ARDS admitted between 2014 and 2018 were included in a prospective monocentric study. Bronchoalveolar lavage (BAL) fluid and blood samples were obtained within 48 h of admission. Twenty-two biomarkers were quantified in BAL fluid and serum. HLA-DR+ monocytes and CD8+ PD-1+ lymphocytes were quantified using flow cytometry. The primary clinical endpoint of the study was hospital mortality. Patients undergoing a bronchoscopy as part of routine care were included as controls.

Results

Seventy ARDS patients were included. Hospital mortality was 21.4%. The BAL fluid-to-serum ratio of IL-8 was 20 times higher in ARDS patients than in controls (p?+ lymphocytes PD-1 expression and hospital mortality.

Conclusions

IL-8 was the most compartmentalized cytokine and lower BAL fluid-to-serum concentration ratios of IL-1Ra were associated with hospital mortality in patients with pneumonia-associated ARDS.

SUBMITTER: Bendib I 

PROVIDER: S-EPMC7794625 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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Publications

Alveolar compartmentalization of inflammatory and immune cell biomarkers in pneumonia-related ARDS.

Bendib Inès I   Beldi-Ferchiou Asma A   Schlemmer Frédéric F   Surenaud Mathieu M   Maitre Bernard B   Plonquet Anne A   Carteaux Guillaume G   Razazi Keyvan K   Godot Veronique V   Hüe Sophie S   Mekontso Dessap Armand A   de Prost Nicolas N  

Critical care (London, England) 20210109 1


<h4>Background</h4>Biomarkers of disease severity might help individualizing the management of patients with the acute respiratory distress syndrome (ARDS). Whether the alveolar compartmentalization of biomarkers has a clinical significance in patients with pneumonia-related ARDS is unknown. This study aimed at assessing the interrelation of ARDS/sepsis biomarkers in the alveolar and blood compartments and explored their association with clinical outcomes.<h4>Methods</h4>Immunocompetent patients  ...[more]

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