Using a targeted metabolomics approach to explore differences in ARDS associated with COVID-19 compared to ARDS caused by H1N1 influenza and bacterial pneumonia

Crit Care. 2024 Feb 27;28(1):63. doi: 10.1186/s13054-024-04843-0.

Abstract

Rationale: Acute respiratory distress syndrome (ARDS) is a life-threatening critical care syndrome commonly associated with infections such as COVID-19, influenza, and bacterial pneumonia. Ongoing research aims to improve our understanding of ARDS, including its molecular mechanisms, individualized treatment options, and potential interventions to reduce inflammation and promote lung repair.

Objective: To map and compare metabolic phenotypes of different infectious causes of ARDS to better understand the metabolic pathways involved in the underlying pathogenesis.

Methods: We analyzed metabolic phenotypes of 3 ARDS cohorts caused by COVID-19, H1N1 influenza, and bacterial pneumonia compared to non-ARDS COVID-19-infected patients and ICU-ventilated controls. Targeted metabolomics was performed on plasma samples from a total of 150 patients using quantitative LC-MS/MS and DI-MS/MS analytical platforms.

Results: Distinct metabolic phenotypes were detected between different infectious causes of ARDS. There were metabolomics differences between ARDSs associated with COVID-19 and H1N1, which include metabolic pathways involving taurine and hypotaurine, pyruvate, TCA cycle metabolites, lysine, and glycerophospholipids. ARDSs associated with bacterial pneumonia and COVID-19 differed in the metabolism of D-glutamine and D-glutamate, arginine, proline, histidine, and pyruvate. The metabolic profile of COVID-19 ARDS (C19/A) patients admitted to the ICU differed from COVID-19 pneumonia (C19/P) patients who were not admitted to the ICU in metabolisms of phenylalanine, tryptophan, lysine, and tyrosine. Metabolomics analysis revealed significant differences between C19/A, H1N1/A, and PNA/A vs ICU-ventilated controls, reflecting potentially different disease mechanisms.

Conclusion: Different metabolic phenotypes characterize ARDS associated with different viral and bacterial infections.

Keywords: Acute respiratory distress syndrome; H1N1; Metabolomics; Pneumonia; SARS-CoV-2.

MeSH terms

  • COVID-19* / complications
  • Chromatography, Liquid
  • Humans
  • Influenza A Virus, H1N1 Subtype*
  • Influenza, Human* / complications
  • Influenza, Human* / therapy
  • Lysine
  • Pneumonia, Bacterial*
  • Pyruvates
  • Respiratory Distress Syndrome* / complications
  • Respiratory Distress Syndrome* / therapy
  • Tandem Mass Spectrometry

Substances

  • Lysine
  • Pyruvates