Plasma Markers of COVID-19 Severity: a Pilot Study
Overview
Authors
Affiliations
Background: SARS-CoV-2 infected patients show heterogeneous clinical presentations ranging from mild symptoms to severe respiratory failure and death. Consequently, various markers reflect this wide spectrum of disease presentations.
Methods: Our pilot cohort included moderate (n = 10) and severe (n = 10) COVID-19 patients, and 10 healthy controls. We determined plasma levels of nine acute phase proteins (APPs) by nephelometry, and full-length (M65), caspase-cleaved (M30) cytokeratin 18, and ADAMTS13 (a disintegrin-like and metalloprotease with thrombospondin type-1 motif 13) by ELISA. In addition, we examined whole plasma N-glycosylation by capillary gel electrophoresis coupled to laser-induced fluorescence detection (CGE-LIF).
Results: When compared to controls, COVID-19 patients had significantly lower concentrations of ADAMTS13 and albumin (ALB) but higher M30, M65, α1-acid glycoprotein (AGP), α1-antitrypsin (AAT), ceruloplasmin (CP), haptoglobin (HP), and high-sensitivity C-reactive protein (hs-CRP). The concentrations of α1-antichymotrypsin (ACT), α2-macroglobulin (A2MG) and serum amyloid A (SAA) proteins did not differ. We found significantly higher levels of AAT and M65 but lower ALB in severe compared to moderate COVID-19 patients. N-glycan analysis of the serum proteome revealed increased levels of oligomannose- and sialylated di-antennary glycans and decreased non-sialylated di-antennary glycan A2G2 in COVID-19 patients compared to controls.
Conclusions: COVID-19-associated changes in levels and N-glycosylation of specific plasma proteins highlight complexity of inflammatory process and grant further investigations.
The Glycosylation of Serum IgG Antibodies in Post-COVID-19 and Post-Vaccination Patients.
Varadi C Int J Mol Sci. 2025; 26(2.
PMID: 39859521 PMC: 11765615. DOI: 10.3390/ijms26020807.
Development and validation of nomogram models for severe and fatal COVID-19.
Chen J, Hu Q, Zhong R, Li L, Kang Y, Chen L Sci Rep. 2024; 14(1):29146.
PMID: 39587251 PMC: 11589750. DOI: 10.1038/s41598-024-80310-8.
Acute phase proteins patterns as biomarkers in bacterial infection: Recent insights.
Al Ali A, Darwish W Open Vet J. 2024; 14(10):2539-2550.
PMID: 39545194 PMC: 11560262. DOI: 10.5455/OVJ.2024.v14.i10.4.
Clinical glycoproteomics: methods and diseases.
Wang Y, Lei K, Zhao L, Zhang Y MedComm (2020). 2024; 5(10):e760.
PMID: 39372389 PMC: 11450256. DOI: 10.1002/mco2.760.
The Impact of Serum/Plasma Proteomics on SARS-CoV-2 Diagnosis and Prognosis.
DAmato M, Grignano M, Iadarola P, Rampino T, Gregorini M, Viglio S Int J Mol Sci. 2024; 25(16).
PMID: 39201322 PMC: 11354567. DOI: 10.3390/ijms25168633.