Large scale phenotyping of long COVID inflammation reveals mechanistic subtypes of disease
Liew, F.; Efstathiou, C.; Fontanella, S.; Richardson, M.; Saunders, R.; Swieboda, D.; Sidhu, J. K.; Ascough, S.; Moore, S. C.; Mohamed, N.; Nunag, J.; King, C.; Leavy, O. C.; Elneima, O.; McAULEY, H. J. C.; Shikotra, A.; Singapuri, A.; Sereno, M.; Harris, V. C.; Houchen-Wolloff, L.; Greening, N. J.; Lone, N. I.; Thorpe, M.; Thompson, A. R.; Rowland-Jones, S. L.; Docherty, A. B.; Chlamers, J. D.; Ho, L.-P. B.; Horsley, A.; Raman, B.; Poinasamy, K.; Marks, M.; Kon, O. M.; Howard, L.; Wootton, D. G.; Quint, J. K.; deSilva, T. I.; Ho, A.; Chiu, C.; Harrison, E. M.; Greenhalf, W.; Baillie, J. K.; S
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One in ten SARS-CoV-2 infections result in prolonged symptoms termed long COVID, yet disease phenotypes and mechanisms are poorly understood. We studied the blood proteome of 719 adults, grouped by long COVID symptoms. Elevated markers of monocytic inflammation and complement activation were associated with increased likelihood of all symptoms. Elevated IL1R2, MATN2 and COLEC12 associated with cardiorespiratory symptoms, fatigue, and anxiety/depression, while elevated MATN2 and DPP10 associated with gastrointestinal (GI) symptoms, and elevated C1QA was associated with cognitive impairment (the proteome of those with cognitive impairment and GI symptoms being most distinct). Markers of neuroinflammation distinguished cognitive impairment whilst elevated SCG3, indicative of brain-gut axis disturbance, distinguished those with GI symptoms. Women had a higher incidence of long COVID and higher inflammatory markers. Symptoms did not associate with respiratory inflammation or persistent virus in sputum. Thus, persistent inflammation is evident in long COVID, distinct profiles being associated with specific symptoms.
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