Volume 54, Issue 4 e14155
ORIGINAL ARTICLE

Neutrophil degranulation, endothelial and metabolic dysfunction in unvaccinated long COVID patients

Agostino Di Ciaula

Agostino Di Ciaula

Clinica Medica “A. Murri”, Division of Internal Medicine, Department of Preventive and Regenerative Medicine and Ionian Area (DiMePrev-J), University of Bari Aldo Moro, Bari, Italy

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Luca Liberale

Luca Liberale

First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa, Genoa, Italy

IRCCS Ospedale Policlinico San Martino Genoa—Italian Cardiovascular Network, Genoa, Italy

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Piero Portincasa

Corresponding Author

Piero Portincasa

Clinica Medica “A. Murri”, Division of Internal Medicine, Department of Preventive and Regenerative Medicine and Ionian Area (DiMePrev-J), University of Bari Aldo Moro, Bari, Italy

Correspondence

Piero Portincasa, Department of Precision and Regenerative Medicine and Ionian Area (DiMePre-J), University of Bari Aldo Moro, Policlinico Hospital, Piazza G. Cesare 11, 70124 Bari, Italy.

Email: [email protected]

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Mohamad Khalil

Mohamad Khalil

Clinica Medica “A. Murri”, Division of Internal Medicine, Department of Preventive and Regenerative Medicine and Ionian Area (DiMePrev-J), University of Bari Aldo Moro, Bari, Italy

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Ilaria Galerati

Ilaria Galerati

Clinica Medica “A. Murri”, Division of Internal Medicine, Department of Preventive and Regenerative Medicine and Ionian Area (DiMePrev-J), University of Bari Aldo Moro, Bari, Italy

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Ilaria Farella

Ilaria Farella

Clinica Medica “A. Murri”, Division of Internal Medicine, Department of Preventive and Regenerative Medicine and Ionian Area (DiMePrev-J), University of Bari Aldo Moro, Bari, Italy

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Antonino Noto

Antonino Noto

Clinica Medica “A. Murri”, Division of Internal Medicine, Department of Preventive and Regenerative Medicine and Ionian Area (DiMePrev-J), University of Bari Aldo Moro, Bari, Italy

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Stephy JohnBritto

Stephy JohnBritto

Clinica Medica “A. Murri”, Division of Internal Medicine, Department of Preventive and Regenerative Medicine and Ionian Area (DiMePrev-J), University of Bari Aldo Moro, Bari, Italy

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Margherita Moriero

Margherita Moriero

First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa, Genoa, Italy

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Cristina Michelauz

Cristina Michelauz

First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa, Genoa, Italy

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Federica Frè

Federica Frè

First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa, Genoa, Italy

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Chiara Olivero

Chiara Olivero

First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa, Genoa, Italy

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Maria Bertolotto

Maria Bertolotto

First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa, Genoa, Italy

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Fabrizio Montecucco

Fabrizio Montecucco

First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa, Genoa, Italy

IRCCS Ospedale Policlinico San Martino Genoa—Italian Cardiovascular Network, Genoa, Italy

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Federico Carbone

Federico Carbone

First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa, Genoa, Italy

IRCCS Ospedale Policlinico San Martino Genoa—Italian Cardiovascular Network, Genoa, Italy

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Leonilde Bonfrate

Leonilde Bonfrate

Clinica Medica “A. Murri”, Division of Internal Medicine, Department of Preventive and Regenerative Medicine and Ionian Area (DiMePrev-J), University of Bari Aldo Moro, Bari, Italy

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First published: 16 January 2024
Citations: 4

Agostino Di Ciaula and Luca Liberale equally contributed as first authors to this work.

Federico Carbone and Leonilde Bonfrate equally contributed as last authors to this work.

Abstract

Background

Long COVID symptoms are widely diffused and have a poorly understood pathophysiology, with possible involvement of inflammatory cytokines.

Materials and Methods

A prospective follow-up study involved 385 unvaccinated patients, started 1 month after SARS-CoV-2 infection and continued for up to 12 months. We compared circulating biomarkers of neutrophil degranulation, endothelial and metabolic dysfunction in subjects with long COVID symptoms and in asymptomatic post-COVID controls.

Results

The highest occurrence of symptoms (71%) was after 3 months from the infection, decreasing to 62.3% and 29.4% at 6 and 12 months, respectively. Compared to controls, long COVID patients had increased levels of the neutrophilic degranulation indices MMP-8 and MPO, of endothelial dysfunction indices L-selectin and P-selectin. Among indices of metabolic dysfunction, leptin levels were higher in long COVID patients than in controls.

Conclusion

In unvaccinated patients, symptoms may persist up to 1 year after acute COVID infection, with increased indices of neutrophil degranulation, endothelial and metabolic dysfunction. The clinical implications of specific inflammatory biomarkers require further attention, especially in individuals with fatigue and long COVID-linked cognitive dysfunctions.

CONFLICT OF INTEREST STATEMENT

None to declare.

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