Clinical Significance of serum Endothelin-1 and Interleukin-8 in Sepsis

Background Sepsis is a clinical syndrome characterized by a systemic inflammatory and hemodynamic response to severe bacterial infections that involve various mediators. Endothelin (ET)-1, a potent vasocon strictor is associated with multiple organ failure, and interleukin (IL)-8, a proinflammtory cytokine, plays a major role in neurophil activation. Both have been reported to be useful parameters in the clinical assessment of sepsis. The levels of ET-1 and IL-8 in the blood were measured in patients with sepsis, and the correlation of both parameters and their relationship with the clinical data was assessed. Methods 19 sepsis patients and 17 controls were studied. Blood samples of the sepsis patients were drawn in day 1, 3, 7, and 14. the APACHE III scores were calculated in concurrent days. The ET-1 and IL-8 levels were measured using immunoassay methods. Results The ET-1 levels of patients with sepsis were significantly higher than in the controls. In patients with sepsis, non-survivors had higher ET-1 levels than survivors on day 1 and 7, and patients with shock also had higher ET-1 levels than normotensive patients on admission. The ET-1 levels were significantly correlated wit the creatinine levels in day 1, 7, and 14. The IL-8 levels showed a significant correlation with the ET-1 levels on day 14. Conclusion ET-1 was found to be closely related with the clinical outcome, shock, and renal failure, and showed a correlation with IL-8. these mediators can be considered not only to play pathophysiologic roles but also as useful parameters in the clinical assessment of sepsis.