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Dündar NB, Sarphie D, Yüce K, Gaygısız Ü, Kaskatı OT, Türkoğlu M, Bıkmaz GA, Karabıyık L, Çağlar K, Bozdayı G, Mian R, Moss P, İlhan MN. Assessing neutrophil-derived ROS production at the bedside: a potential prognostic tool in severe COVID-19 cases. Intensive Care Med Exp 2023; 11:69. [PMID: 37801184 PMCID: PMC10558411 DOI: 10.1186/s40635-023-00554-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 09/27/2023] [Indexed: 10/07/2023] Open
Abstract
PURPOSE A prompt and effective immune response is required for clearance of pathogens but exaggerated states of inflammation can cause extensive collateral damage to the host. We have previously used a rapid near-patient assay that measures the functional capacity of neutrophils to produce reactive oxygen species (ROS) to show that values are elevated in patients with severe COVID-19 or sepsis. Here, we assess the utility of longitudinal ROS measurements to monitor and predict mortality outcome for patients with COVID-19 infection being treated in an ICU setting. METHODS We used the Leukocyte ImmunoTest™ (LIT™) to quantify neutrophil ROS release using a small volume (10 µL) of capillary blood in a portable, rapid (10-min) format. RESULTS ROS values (LIT score) and ROS levels assessed in relation to neutrophil count (LIT/N) were both markedly elevated in the patient group. Furthermore, these correlated strongly with peripheral neutrophil count and CRP value. Serial measurement of neutrophil or CRP values were not able to reliably predict mortality within the study. In contrast, LIT and LIT/N values started to decline at 7 and 5 days, respectively, in patients who survived ICU admission and this increment increased further thereafter. CONCLUSIONS This study raises the possibility of LIT and LIT/N to be used as a predictive clinical tool for patients with severe COVID-19 and argues for its assessment to inform on prognosis, and potentially guide treatment pathways, in other disorders associated with neutrophil activation. TAKE-HOME MESSAGE A longitudinal study of 44 severe COVID-19 patients in the ICU of a leading teaching hospital has demonstrated the prognostic potential of a rapid bedside assay of neutrophil-derived reactive oxygen species (ROS). Assessment of changes in ROS production, as measured using the Leukocyte ImmunoTest™, shows that ROS production generally declined back to normal levels for patients who survived, but remained elevated for those patients who did not survive.
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Affiliation(s)
- Nazlıhan Boyacı Dündar
- Department of Internal Medicine, Division of Intensive Care Medicine, Faculty of Medicine, Gazi University, Ankara, Turkey
| | | | - Kenan Yüce
- Department of Clinical Microbiology, Division of Virology, Faculty of Medicine, Gazi University, Ankara, Turkey
| | - Ümmügülsüm Gaygısız
- Department of Anesthesiology and Reanimation, Division of Intensive Care Medicine, Faculty of Medicine, Gazi University, Ankara, Turkey
| | - O Tolga Kaskatı
- Department of Biostatistics, Faculty of Medicine, Lokman Hekim University, Ankara, Turkey
| | - Melda Türkoğlu
- Department of Internal Medicine, Division of Intensive Care Medicine, Faculty of Medicine, Gazi University, Ankara, Turkey
| | - Gülbin Aygencel Bıkmaz
- Department of Internal Medicine, Division of Intensive Care Medicine, Faculty of Medicine, Gazi University, Ankara, Turkey
| | - Lale Karabıyık
- Department of Anesthesiology and Reanimation, Division of Intensive Care Medicine, Faculty of Medicine, Gazi University, Ankara, Turkey
| | - Kayhan Çağlar
- Department of Clinical Microbiology, Division of Virology, Faculty of Medicine, Gazi University, Ankara, Turkey
| | - Gülendam Bozdayı
- Department of Clinical Microbiology, Division of Virology, Faculty of Medicine, Gazi University, Ankara, Turkey
| | | | - Paul Moss
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK
- University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Mustafa Necmi İlhan
- Department of Public Health, Faculty of Medicine, Gazi University, Ankara, Turkey
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