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Scientific result | Biomarkers | Mass spectrometry | Infectious diseases
Two recent studies conducted by SPI researchers, in collaboration with Inserm and AP/HP teams, reveal the value of measuring plasma levels of calgranulins as biomarkers for the prediction of mortality risk of patients with septic shock, admitted in intensive care unit.
Biomarkers in sepsis for severity, prediction of outcome or reversibility of organ dysfunction are warranted. Measurements of plasma DAMP levels at admission can reflect the severity of cellular damage in septic shock, which might predict the prognosis and reduce the risk of overtreating patients with costly therapies. We measured plasma levels of two DAMPs, S100A8/S100A9 and S100A12 during the first 24 h of admission of septic shock patients. Forty-nine septic shock patients with a similar SOFA scores were selected from our sepsis database to compare a similar proportion of survivors and non-survivors. Plasma levels of S100A8/S100A9 and S100A12 were compared with healthy volunteers using in-house ELISA. Plasma levels of S100A8/S100A9 and S100A12 (5.71 [2.60–13.63] µg/mL and 0.48 [0.22–1.05] µg/mL) were higher in septic shock patients than in healthy volunteers (1.18 [0.74–1.93] µg/mL and 0.09 [0.02–0.39] µg/mL) (P < 0.0001 and P = 0.0030). Levels of S100A8/S100A9 and S100A12 in non-survivors at day 28 (11.70 [2.85–24.36] µg/mL and 0.62 [0.30–1.64] µg/mL) were significantly higher than in survivors (4.59 [2.16–7.47] µg/mL and 0.30 [0.20–0.49] µg/mL) (P = 0.0420 and P = 0.0248) and correlated well (Spearman r = 0.879, P < 0.0001). The high level of plasma calgranulins at admission in septic shock, were higher in non-survivors compared to survivors. These markers could indicate a higher risk of death when SOFA scores are similar and help the stratification of patients for improved care and therapy selection.
Dubois C, Marcé D, Faivre V, Lukaszewicz AC, Junot C, Fenaille F, Simon S, Becher F, Morel N, Payen D. High plasma level of S100A8/S100A9 and S100A12 at admission indicates a higher risk of death in septic shock patients. Scientific Report 2019 Oct 30; 9(1):15660. https://www.nature.com/articles/s41598-019-52184-8
Dubois C, Payen D, Simon S, Junot C, Fenaille F, Morel N, Becher F. Top-Down and Bottom-Up Proteomics of Circulating S100A8/S100A9 in Plasma of Septic Shock Patients. J Proteome Res. 2020 Feb 7; 19(2):914-925. https://doi.org/10.1021/acs.jproteome.9b00690
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