Changes in Mannose-Binding Lectin and Collectin Kidney 1 Levels in Sepsis Patients With and Without Disseminated Intravascular Coagulation

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In sepsis, systemic coagulation activation frequently causes disseminated intravascular coagulation (DIC), and the uncontrolled activation of the complement system can induce multiple organ dysfunction and poor prognosis. This study aimed to examine the association of DIC with levels of collectin kidney 1 (CL-K1), a novel collectin of the complement system, and mannose-binding lectin (MBL), a classical-type collectin in patients with sepsis. We collected blood samples prospectively from adult patients with sepsis admitted to the intensive care unit (ICU) from day 1 (admission) to day 5. The CL-K1 and MBL levels were measured by enzyme-linked immunosorbent assay, and DIC was diagnosed by using a scoring algorithm. The correlation of CL-K1 and MBL levels with other coagulation markers was analyzed. There were 37 patients with DIC (DIC group) and 15 without DIC (non-DIC group). Compared to the non-DIC group, the DIC group had more severe conditions and higher mortality. During the 5 days after ICU admission, plasma CL-K1 levels were similar between the groups, but plasma MBL levels were significantly lower in the DIC group. Plasma CL-K1 levels were weakly correlated with prothrombin time, activated partial thromboplastin time, and antithrombin levels; plasma MBL levels were weakly correlated with fibrin/fibrinogen degradation product levels and DIC score. In conclusion, during the first 5 days of ICU admission, plasma CL-K1 levels were similar between the DIC and non-DIC groups. However, plasma MBL levels were lower in the DIC group compared to the non-DIC group, and the significance of this difference grew gradually over time.

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