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Terminal complement complex in septic shock with capillary leakage: marker of complement activation?

  • T. Schuerholz (a1), M. Leuwer (a2), M. Cobas-Meyer (a3), B. Vangerow (a3), F. Kube (a4), M. Kirschfink (a5) and G. Marx (a1)...

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Summary

Background and objective: The aim of this study was to evaluate the value of terminal complement complex (C5b-9) plasma levels as a marker for complement activation in septic shock with concomitant capillary leak syndrome. Methods: In a prospective animal study 10 fasted, anaesthetized, mechanically ventilated and multi-catheterized pigs (20.6 ± 1.3 kg) were investigated over a period of 8 h. Sepsis was induced by faecal peritonitis (1 g kg−1 body weight faeces, n = 5) and compared to controls (n = 5). The animals received 6% hydroxyethyl starch 200/0.5 to maintain a central venous pressure of 12 mmHg. To quantify capillary leak syndrome, albumin escape rate was measured using 99mTc-labelled human serum albumin. Plasma levels of terminal complement complex were measured in a double antibody immunoassay (neoepitope-specific MoAb aE11 as catching antibody). Immunohistological studies of renal specimens were performed to detect terminal complement complex deposition. Results: Albumen escape rate increased in septic animals (+52%) compared to controls (+3%, P < 0.05). Plasma levels of terminal complement complex decreased during the study period in both groups. In septic animals this finding was accompanied by a significant deposition of terminal complement complex in renal specimens (P < 0.05). Conclusion: We found an activation of the complement system proven by marked deposition of terminal complement complex in renal specimen, while its plasma levels decreased during the study period in septic and control animals. These results suggest that in septic shock with capillary leak syndrome plasma level of terminal complement complex may not be a reliable marker of complement activation.

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Correspondence to: Tobias Schuerholz, Department of Anaesthesiology and Intensive Care, Friedrich Schiller University, Erlanger Allee 101, D-07747 Jena, Germany. E-mail: tobias.schuerholz@med.uni-jena.de; Tel: +49 3641 9323280; Fax: +49 3641 9323112

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Terminal complement complex in septic shock with capillary leakage: marker of complement activation?

  • T. Schuerholz (a1), M. Leuwer (a2), M. Cobas-Meyer (a3), B. Vangerow (a3), F. Kube (a4), M. Kirschfink (a5) and G. Marx (a1)...

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