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  • Title: The macrophage activation marker sMR as a diagnostic and prognostic marker in patients with acute infectious disease with or without sepsis.
    Author: Marie Relster M, Gaini S, Møller HJ, Johansen IS, Pedersen C.
    Journal: Scand J Clin Lab Invest; 2018 May; 78(3):180-186. PubMed ID: 29383956.
    Abstract:
    Sepsis is a leading cause of mortality. This study aims to assess the utility of the soluble mannose receptor (sMR) as a biomarker of sepsis and mortality in patients hospitalized with suspected infection. Using an in-house ELISA assay the concentration of sMR was analyzed in the serum of patients from three prospective studies. Using Sepsis-3 guidelines, patients were stratified as no infection (NI, n = 68), verified infection without sepsis (NSEP, n = 133) and verified infection with sepsis (SEP, n = 190). Adverse outcome was assessed as death before 28 days. We show that the sensitivity of sMR to predict mortality [area under curve (AUC) = 0.77] exceeded the sensitivity of procalcitonin (PCT, AUC = 0.63), C-reactive protein (CRP, AUC = 0.61) and the macrophage soluble receptor, CD163 (sCD163, AUC = 0.74), while it was less accurate to predict diagnosis of sepsis [AUC(sMR) = 0.69 vs. AUC(PCT) = 0.79, AUC(CRP) = 0.71 and AUC(sCD163) = 0.66]. Median sMR was significantly higher in the group with SEP (0.55 mg/L), compared with the groups without sepsis (NI and NSEP) (0.39 mg/L, p < .0001), and among those who died compared to those who survived (0.89 mg/L vs. 0.44 mg/L, p < .0001). Our results, and the current literature, support further evaluation of sMR as a biomarker of sepsis and mortality among patients hospitalized with suspected infection.
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