Abstract:
:Both the complement system and tissue factor (TF), a key initiating component of coagulation, are activated in sepsis, and cross-talk occurs between the complement and coagulation systems. C1-inhibitor (C1-INH) can act as a regulator in both systems. Our aim in this study was to examine this cross-talk by investigating the effects of C1-INH on Escherichia coli-induced haemostasis and inflammation. Fresh human whole blood collected in lepirudin was incubated with E. coli or ultrapurified E. coli lipopolysaccharide (LPS) in the absence or presence of C1-INH or protease-inactivated C1-INH. C3 activation was blocked by compstatin, a specific C3 convertase inhibitor. TF mRNA was measured using reverse transcription-quantitative polymerase chain reaction (RT-qPCR), and TF surface expression was measured by flow cytometry. In plasma, the terminal complement complex, prothrombin F1·2 (PTF1·2) and long pentraxin 3 (PTX3) were measured by enzyme-linked immunosorbent assay (ELISA). Cytokines were analysed using a multiplex kit. C1-INH (1·25-5 mg/ml) reduced both LPS- and E. coli-induced coagulation, measured as a reduction of PTF1·2 in plasma, efficiently and dose-dependently (P < 0·05). Both LPS and E. coli induced marked up-regulation of TF mRNA levels and surface expression on whole blood monocytes. This up-regulation was reduced efficiently by treatment with C1-INH (P < 0·05). C1-INH reduced the release of PTX3 (P < 0·05) and virtually all cytokines measured (P < 0·05). Complement activation was inhibited more efficiently with compstatin than with C1-INH. C1-INH inhibited most of the other readouts more efficiently, consistent with additional non-complement-dependent effects. These results indicate that complement plays a role in activating coagulation during sepsis and that C1-INH is a broad-spectrum attenuator of the inflammatory and haemostatic responses.
journal_name
Clin Exp Immunoljournal_title
Clinical and experimental immunologyauthors
Landsem A,Nielsen EW,Fure H,Christiansen D,Ludviksen JK,Lambris JD,Østerud B,Mollnes TE,Brekke OLdoi
10.1111/cei.12098subject
Has Abstractpub_date
2013-08-01 00:00:00pages
217-29issue
2eissn
0009-9104issn
1365-2249journal_volume
173pub_type
杂志文章abstract::Circulating immune complexes (CIC) were detected by a solid-phase radioassay in 34% of fifty-three insulin-dependent diabetics (IDD) as compared to 18% of forty-five non-insulin-dependent diabetics (NIDD) and 14% of 173 control subjects. In control subjects, the prevalence of CIC increased with age and was higher in m...
journal_title:Clinical and experimental immunology
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doi:
更新日期:1987-03-01 00:00:00
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doi:
更新日期:1982-07-01 00:00:00
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doi:10.1046/j.1365-2249.1998.00733.x
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journal_title:Clinical and experimental immunology
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journal_title:Clinical and experimental immunology
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更新日期:1987-12-01 00:00:00
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journal_title:Clinical and experimental immunology
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journal_title:Clinical and experimental immunology
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journal_title:Clinical and experimental immunology
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journal_title:Clinical and experimental immunology
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journal_title:Clinical and experimental immunology
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