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Verschelden, Gil; Noeparast, Maxim; Noparast, Maryam; Goossens, Mathijs Christiaan; Lauwers, Maïlis; Cotton, Frédéric; Michel, Charlotte; Goyvaerts, Cleo; Hites, Maya
International immunopharmacology, 11/2021, Letnik: 100Journal Article
•The majority of hospitalized COVID-19 patients are zinc deficient.•There is a weak correlation between plasma zinc and the length of hospital stay.•cHIS score, described by Webb et al., is externally validated in this study.•Current findings do not support plasma zinc as a robust prognostic factor. Zinc deficiency is associated with impaired antiviral response, cytokine releasing syndrome (CRS), and acute respiratory distress syndrome. Notably, similar complications are being observed during severe SARS-CoV-2 infection. We conducted a prospective, single-center, observational study in a tertiary university hospital (CUB-Hôpital Erasme, Brussels) to address the zinc status, the association between the plasma zinc concentration, development of CRS, and the clinical outcomes in PCR-confirmed and hospitalized COVID-19 patients. One hundred and thirty-nine eligible patients were included between May 2020 and November 2020 (median age of 65 years IQR = 54, 77). Our cohort's median plasma zinc concentration was 57 µg/dL (interquartile range IQR = 45, 67) compared to 74 µg/dL (IQR = 64, 84) in the retrospective non-COVID-19 control group (N = 1513; p < 0.001). Markedly, the absolute majority of COVID-19 patients (96%) were zinc deficient (<80 µg/dL). The median zinc concentration was lower in patients with CRS compared to those without CRS (-5 µg/dL; 95% CI = -10.5, 0.051; p = 0.048). Among the tested outcomes, zinc concentration is significantly correlated with only the length of hospital stay (rho = -0.19; p = 0.022), but not with mortality or morbidity. As such, our findings do not support the role of zinc as a robust prognostic marker among hospitalized COVID-19 patients who in our cohort presented a high prevalence of zinc deficiency. It might be more beneficial to explore the role of zinc as a biomarker for assessing the risk of developing a tissue-damaging CRS and predicting outcomes in patients diagnosed with COVID-19 at the early stage of the disease.
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