Sepsis biomarkers change continuously during the postoperative period. We aimed to demonstrate the influence of immunosuppressants after transplantation (Tx) on presepsin, procalcitonin, CRP, white blood cells, and IL-6. A group of 140 patients after major surgery (86 non-Tx, 54 Tx) without any signs of sepsis or infectious complications was followed for 7 days. The changes in biomarkers were analyzed with respect to the type of surgery, organ, and induction immunosuppressant used (antithymocyte globulin, corticosteroids, or basiliximab/rituximab). Concentrations (95th percentiles) of presepsin and procalcitonin were higher in the Tx group (presepsin: Tx < 2380 vs. non-Tx < 1368 ng/L, p < 0.05; procalcitonin: <28.0 vs. 3.49 μg/L, p < 0.05). In contrast, CRP and IL-6 were lower in the Tx group (CRP: Tx < 84.2 vs. non-Tx < 229 mg/L, p < 0.05; IL-6: <71.2 vs. 317 ng/L, p < 0.05). Decreases in CRP and IL-6 were found for all immunosuppressants, and procalcitonin was increased after antithymocyte globulin and corticosteroids. Negligible changes were found for white blood cells. Different responses of presepsin, procalcitonin, CRP, and IL-6 were therefore found in patients without any infectious complications after major surgery or transplantation. Immunosuppression decreased significantly IL-6 and CRP in comparison to non-Tx patients, while procalcitonin was increased after corticosteroids and antithymocyte globulin only. Cautious interpretation of sepsis biomarkers is needed in the early posttransplant period. This work was conducted as a noninterventional (nonregistered) study.

1st Faculty of Medicine Charles University Kateřinská 1660 32 121 08 Prague 2 Czech Republic

3rd Faculty of Medicine Charles University Ruská 87 100 00 Prague 10 Czech Republic

Department of Anesthesiology and Resuscitation Institute for Clinical and Experimental Medicine Vídeňská 1958 9 140 21 Prague 4 Czech Republic

Department of Anesthesiology Resuscitation and Intensive Care Institute for Clinical and Experimental Medicine Vídeňská 1958 9 140 21 Prague 4 Czech Republic

Department of Laboratory Methods Institute for Clinical and Experimental Medicine Vídeňská 1958 9 140 21 Prague 4 Czech Republic

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