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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Circulating soluble gp130, soluble IL-6R, and IL-6 in patients undergoing cardiac surgery, with or without extracorporeal circulation.

OBJECTIVE: Soluble forms of interleukin-6 (IL-6) receptors are known to modulate biological activities of IL-6. The purpose of the study was to measure circulating levels of IL-6, sIL-6R and sgp130 in patients undergoing coronary artery bypass grafting with cardiopulmonary bypass ( CPB group) or without CPB (non-CPB group). METHODS: The CPB group included 19 patients and the non-CPB group 12 patients. Sera levels of IL-6, sIL-6R and sgp130 were measured by specific ELISA at the beginning of the operation (T0, 15 min before skin incision) and 6 h later (T1). RESULTS: IL-6 sera levels were respectively 9+/-20 pg/ml (mean+/-SD) and 13+/-19 pg/ml at T0 and reached 340+/-250 pg/ml and 965+/-1060 pg/ml at T1 in CPB and non-CPB groups, indicating a significant increase from T0 to T1, but no differences between the two groups. When compared to T0 values, sgp130 levels decreased in both groups (respectively 105+/-37 and 115+/-35 ng/ml at T0 for CPB and non-CPB groups, and 72+/-25 and 84+/-29 ng/ml at T1) while we are not able to detect differences between the groups. Whatever the group or the time, sIL-6R concentrations remained unchanged. CONCLUSIONS: We showed that the increase of IL-6 after artery bypass grafting was similar between patients operated with CPB or without CPB. We conclude that the main inductor of IL-6 release is linked to surgical trauma rather than a reaction to CPB. Since it is known that gp130 inhibits IL-6-biological activities, we suggest that the decrease of sgp130 sera levels could further enhance the inflammatory effects of IL-6 in cardiac surgery.[1]


  1. Circulating soluble gp130, soluble IL-6R, and IL-6 in patients undergoing cardiac surgery, with or without extracorporeal circulation. Corbi, P., Rahmati, M., Delwail, A., Potreau, D., Menu, P., Wijdenes, J., Lecron, J.C. European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery. (2000) [Pubmed]
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