PMID- 22571497 OWN - NLM STAT- MEDLINE DCOM- 20121010 LR - 20171116 IS - 1399-6576 (Electronic) IS - 0001-5172 (Linking) VI - 56 IP - 6 DP - 2012 Jul TI - Impact of shed blood products on stimulated cytokine release in an in vitro model of transfusion. PG - 724-9 LID - 10.1111/j.1399-6576.2012.02704.x [doi] AB - BACKGROUND: Blood transfusion is reported to suppress the recipient's immune system. To avoid allogenic transfusion, post-operative shed blood retransfusion is a commonly used method. The aim of this study was to investigate the dose-related impact of post-operatively collected shed blood products on the stimulated cytokine release in an in vitro model of transfusion. METHODS: Venous blood samples obtained from 20 patients undergoing hip arthroplasty were mixed with post-operatively collected unprocessed, processed, and irradiated shed blood as well as normal saline as a control. Shed blood was processed by centrifugation and separating the cellular fraction from the soluble fraction and washing the cellular fraction with phosphate buffered saline to eliminate any cell fragments and other substances. Mixing ratios were 1:3, 1:1, and 3:1. Endotoxin-stimulated release of Tumor Necrosis Factor-alpha (TNF-alpha) was measured after 24 h of culture by enzyme-linked immunosorbent assay. RESULTS: Unprocessed, irradiated shed blood and the soluble fraction caused a significant suppression of stimulated TNF-alpha release compared to control. The addition of the cellular shed blood fraction had no significant influence on the TNF-alpha release compared to control. CONCLUSION: Shed blood and its components caused a dose-independent immunomodulation as indicated by a suppressed stimulated TNF-alpha release. Leukocytes seem to play a minor role, as we observed a sustained suppression after transfusion of gamma-irradiated shed blood. Only the elimination of soluble factors by centrifugation and followed by an additional washing step prevented the observed suppression of TNF-alpha. Thus, we assume that washing of shed blood can prevent potential detrimental effects. CI - (c) 2012 The Authors. Acta Anaesthesiologica Scandinavica (c) 2012 The Acta Anaesthesiologica Scandinavica Foundation. FAU - Schneider, S O AU - Schneider SO AD - Department for Anaesthesiology, Critical Care Medicine and Pain Therapy, Saarland University Hospital, Homburg, Germany. sven.schneider@uks.eu FAU - Biedler, A E AU - Biedler AE FAU - Behmenburg, F AU - Behmenburg F FAU - Volk, T AU - Volk T FAU - Rensing, H AU - Rensing H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20120509 PL - England TA - Acta Anaesthesiol Scand JT - Acta anaesthesiologica Scandinavica JID - 0370270 RN - 0 (Cytokines) RN - 0 (Lipopolysaccharides) RN - 0 (Tumor Necrosis Factor-alpha) SB - IM MH - Arthroplasty, Replacement, Hip MH - Blood/radiation effects MH - Centrifugation MH - Cytokines/analysis/*metabolism MH - Enzyme-Linked Immunosorbent Assay MH - Gamma Rays MH - Humans MH - Lipopolysaccharides/pharmacology MH - Monocytes/metabolism MH - *Operative Blood Salvage MH - Stimulation, Chemical MH - Subcellular Fractions/physiology MH - *Transfusion Reaction MH - Tumor Necrosis Factor-alpha/analysis EDAT- 2012/05/11 06:00 MHDA- 2012/10/12 06:00 CRDT- 2012/05/11 06:00 PHST- 2012/02/21 00:00 [accepted] PHST- 2012/05/11 06:00 [entrez] PHST- 2012/05/11 06:00 [pubmed] PHST- 2012/10/12 06:00 [medline] AID - 10.1111/j.1399-6576.2012.02704.x [doi] PST - ppublish SO - Acta Anaesthesiol Scand. 2012 Jul;56(6):724-9. doi: 10.1111/j.1399-6576.2012.02704.x. Epub 2012 May 9.