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The product of growth arrest-specific gene 6 (Gas6) is a vitamin K dependent protein that is secreted by leucocytes and endothelial cells in response to injury and participates in cell survival, proliferation, migration and adhesion. Our purpose was to investigate plasma Gas6 concentration and its relation to organ dysfunction in patients with septic shock.    Methods  Forty-five patients with septic shock admitted to a medical adult intensive care unit were enrolled. Plasma Gas6 concentration was determined using enzyme-linked immunosorbent assay at days 1, 3, 7 and 14.    Results  The median (interquartile range) Gas6 concentration was 51 (5 to 95) pg/ml at admission. A positive correlation (Spearman rank-order coefficient [rs] = 0.37,  P  = 0.01) was found between Gas6 level and Sepsis-related Organ Failure Assessment score. Patients requiring renal support had higher Gas6 concentration that those without need for haemofiltration (76.5 [52 to 164] pg/ml versus 10.5 [1.5 to 80.5] pg/ml;  P  = 0.04). Moreover, there was a positive correlation between Gas6 and aspartate transaminase (rs = 0.42,  P  = 0.006) and between Gas6 and prothrombin time (rs = 0.45,  P  = 0.02). Although there was a progressive decline in Gas6 concentration in survivors (analysis of variance,  P  = 0.01), nonsurvivors exhibited persistently elevated Gas6. However, the two populations diverged only after day 7 ( P  = 0.04).    Conclusion  Plasma concentrations of Gas6 correlate with disease severity, especially with renal and hepatic dysfunction, in septic shock.

Growth arrest-specific protein 6 plasma concentrations during septic shock.