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In Vivo Visualization and Quantification of Neutrophil Elastase in Lungs of COVID-19 Patients: A First-in-Humans PET Study with (11)C-NES #MMPMID35680418
Antoni G; Lubberink M; Sorensen J; Lindstrom E; Elgland M; Eriksson O; Hultstrom M; Frithiof R; Wanhainen A; Sigfridsson J; Skorup P; Lipcsey M
J Nucl Med 2023[Jan]; 64 (1): 145-148 PMID35680418show ga
Coronavirus disease 2019 (COVID-19) can cause life-threatening lung inflammation that is thought to be mediated by neutrophils. The aim of the present work was to evaluate a novel PET tracer for neutrophil elastase (NE). Methods: In this first-in-humans study, 4 patients with hypoxia due to COVID-19 and 2 healthy controls were investigated with PET using (11)C-NES and (15)O-water for visualization and quantification of NE and perfusion in the lungs, respectively. Results: (11)C-NES accumulated selectively in lung areas with COVID-19 opacities on CT scans, suggesting high levels of NE there. In the same areas, perfusion was severely reduced in comparison to healthy lung tissue as measured with (15)O-water. Conclusion: The data suggest that NE is associated with severe lung inflammation in COVID-19 patients and that inhibition of NE could potentially reduce the acute inflammatory process and improve the condition.