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  • Meeting abstract
  • Open Access

Dexamethasone effect on sFas/sFas ligand following cardiopulmonary bypass

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  • 1,
  • 1,
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Critical Care20015(Suppl 1):P075

https://doi.org/10.1186/cc1142

Received: 15 January 2001

Published: 2 March 2001

Keywords

  • Dexamethasone
  • Congenital Heart Disease
  • Cardiopulmonary Bypass
  • Response Post
  • Circulatory Arrest

Introduction

Steroids decrease systemic inflammation following cardiopulmonary bypass (CPB). Membrane bound Fas is a receptor found on many cells, which stimulates apoptosis when cleaved by Fas ligand (FasL). FasL also has a proinflammatory role and is released following ischaemia-reperfusion. We wished to investigate the time course of release of the soluble forms of Fas and FasL (sFas, sFasL) post CPB, and whether steroid pre-treatment altered the response.

Method

Twenty-seven children with congenital heart disease were studied, median (IQ) age 7 (0.4-10) months. Patients were given 0.25 mg/kg dexamethasone (DEX) (n = 13) or no DEX (n = 14) at induction of anaesthesia. Groups were well matched in terms of age, type of operation, length of CPB, cross clamp, and circulatory arrest (all P > 0.15). sFas, sFasL and interleukin (IL) 6 (a marker of cytokine response) were measured over 24 hours by double sandwich ELISA.

Results

DEX significantly blunted the release of IL6 and sFas, but not sFasL. The DEX group exhibited a decreased clinical inflammatory response post CPB as evidenced by a lower temperature, less colloid requirement, chest drain loss, acidosis, hyperlactataemia and coagulopathy (all P < 0.05).
Figure 1

Figure

Conclusion

DEX blunts IL6 and sFas but not sFasL release following CPB, attenuating clinical inflammatory response. The significance of the sFas response is unclear; this may be a passive marker of a decreased inflammatory response but decreased levels may also negatively influence apoptosis/inflammation by being less able to 'mop-up' excess membrane and soluble FasL.

Authors’ Affiliations

(1)
Department of Paediatric Intensive Care, Guy's Hospital, London, UK

Copyright

© The Author(s) 2001

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