Dynamic Changes in Soluble Triggering Receptor Expressed on Myeloid Cells-1 in Sepsis with Respect to Antibiotic Susceptibility

Purpose: Proper antibiotic administration is crucial for sepsis management. Given the escalating incidence of antimicrobial resistance, there is a pressing need for indicators of antimicrobial susceptibility with short turnaround times. This study aimed to investigate the potential of soluble triggering receptor expressed on myeloid cells -1 (sTREM-1) as an early biomarker for in vivo antibiotic susceptibility in patients with sepsis. Patients and Methods: We conducted a retrospective analysis of plasma samples from patients enrolled in a pre -established study designed to investigate prognostic biomarkers in patients with sepsis or septic shock. Baseline and 6 h sTREM-1 levels were examined using enzyme -linked immunosorbent assays. The primary outcome of the study was the comparison of percentage changes in sTREM1 levels at the 6 h relative to baseline with respect to antibiotic susceptibility. Results: Of the 596 patients enrolled in the pre -established study, 29 with a median age of 75.8 and a 28 -day mortality rate of 17.2% were included in the present analysis. Among these patients, 24 were classified into the susceptible group, whereas the remaining five were classified into the resistant group. The trend in plasma sTREM-1 levels differed with respect to antibiotic susceptibility. Moreover, percentage change in sTREM-1 levels at the 6 h relative to baseline was significantly higher in the resistant group ( P = 0.028). Conclusion: The trend in plasma sTREM-1 levels in patients with sepsis differed with respect to antibiotic susceptibility, with a higher percentage change in patients treated with inappropriate antibiotics. These findings indicate the potential utility of sTREM-1 as an early biomarker of antibiotic susceptibility.