title: Elevated S100A12 and sRAGE are associated with increased length of hospitalization after non-urgent coronary artery bypass grafting surgery.
abstract: Study's purpose: Plasma levels of soluble receptor for advanced glycation endproducts (sRAGE) and S100A12 are increased in young children after cardiac surgery and correlate with the time spent on cardiopulmonary bypass (CPB). This study was performed to investigate whether plasma levels of sRAGE and S100A12 are affected by the use of CPB. Levels of S100A12 and sRAGE, along with of interleukin-6, tumor necrosis factor-α, myeloperoxidase, and C-reactive protein were measured in 25 adults undergoing non-urgent coronary artery bypass grafting with and without the use of CPB. Significant finding: Plasma levels of S100A12, sRAGE, IL-6, TNF-α and MPO 4h after cardiac surgery were elevated compared to baseline; this increase was equally observed in patients undergoing traditional coronary artery bypass grafting on cardiopulmonary bypass (n = 16), and in patients undergoing robot-assisted coronary artery bypass grafting off pump (OPCAB, n = 9). Patients with prolonged hospitalization of 7 days or longer had significantly higher S100A12 and sRAGE 4 hours post surgery compared to patients hospitalized ≤ 6 days.
  
  
  CONCLUSIONS
  Increased sRAGE and S100A12 after cardiac surgery is associated with prolonged length of hospitalization in patients after coronary artery bypass grafting; however, we did not observe an intrinsic effect of cardiopulmonary bypass on S100A12 or sRAGE plasma levels in our small pilot study. Further studies are required to confirm the value of sRAGE and S100A12 in predicting postoperative complications after cardiac surgery in a larger study.
authors.affiliation: Department of Medicine, Section of Cardiology, The University of Chicago Chicago Illinois, USA.
authors.forename: Ricardo
authors.initials: R
authors.lastname: Scheiber-Camoretti
authors.forename: Amit
authors.initials: A
authors.lastname: Mehrotra
authors.forename: Ling
authors.initials: L
authors.lastname: Yan
authors.forename: Jai
authors.initials: J
authors.lastname: Raman
authors.forename: John F
authors.initials: JF
authors.lastname: Beshai
authors.forename: Marion A
authors.initials: MA
authors.lastname: Hofmann Bowman
keywords: Coronary artery bypass graft surgery; S100/calgranulin; biomarker; sRAGE