Effect on Syndecan-1 and Hyaluronan Levels Depending on Multiple Organ Failure, Coagulopathy and Survival: An Observational Study in Major Trauma Patients

<b>Background:</b> Major trauma, as well as traumatic hemorrhagic shock go along with early damage to the endothelial glycocalyx (EG). Shed glycocalyx constituents can activate the innate immune system and aggravate secondary injury. Subsequently, we investigated the relationship between glycocalyx shedding and the occurrence of coagulopathy, multiple organ failure (MOF) and outcome in our cohort after severe trauma. <b>Methods:</b> We included multiple trauma patients, as defined by Injury Severity Score (ISS). Polytraumatized patients must have arrived in our level 1 trauma center within 60 min after trauma. Retrospectively, patients were assigned to predefined clinical conditions, based on injury severity (ISS ≥ 16 points), multiple organ failure (MOF score ≥ 6 points), need for massive transfusion (≥10 RBC units/first 24 h), coagulopathy (prothrombin time < 70% at 0 h) and survival (90-day survival). Syndecan-1 (Sdc-1) and hyaluronan (HA) plasma concentrations were evaluated immediately (0 h), 6 h and 12 h after trauma. <b>Results:</b> 49 patients (mean ISS 35.7 ± 12.1 SD, mean age 45.78 ± 15.6 SD) were included in this study. A total of 37 patients (75.5%) survived, while 12 patients died within the observation period of 90 days after trauma (24.5%). A total of 77% of all patients suffered multiple organ failure (MOF score ≥ 6, n = 30). Initial prothrombin time at 0 h was <70% in 31 patients. Plasma concentrations of circulating both glycocalyx constituents showed a significant increase over the first 12 h after trauma (<i>p</i> = 0.001; <i>p</i> = 0.008). Patients with multiple organ failure showed significantly increased hyaluronan concentrations at all three time points (<i>p</i> = 0.007/0.006/<0.001), and the syndecan-1 levels were significantly elevated 12 h after trauma in the MOF group (<i>p</i> = 0.01). Patients with coagulopathy on admission exhibited significantly higher hyaluronan levels at 12 h (<i>p</i> = 0.042). Non-survivors showed significantly increased syndecan-1 levels at 12 h after trauma (<i>p</i> = 0.024). <b>Conclusions:</b> Glycocalyx shedding occurs immediately after major trauma. Coagulopathy is associated with significantly increased plasma hyaluronan. Further, significant changes in plasma concentrations within the first 12 h help to identify subgroups at risk for developing MOF and death.