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J Thorac Cardiovasc Surg 2002;123:451-458
© 2002 The American Association for Thoracic Surgery
Surgery for Congenital Heart Disease (CHD) |
serum levels in response to cardiac surgery
From the Department of Pediatrics and Pediatric Surgery, Pediatric Intensive Care Unit, Hospital General Universitario Gregorio Marañóna Service of Medicine/ Clinical Immunology and Oncology, Hospital Universitario Príncipe de Asturias, University of Alcalá, Alcalá de Henaresd Service of Internal Medicine, Hospital Universitario Ramón y Cajal, University of Alcaláb and Laboratory of Clinical Immunology, Department of Medicine, University of Alcalá, Alcalá de Henares,c Madrid, Spain.
This work was partially supported by FIS, CICYT, and FEDER-SALUD.
Received for publication Feb 14, 2001; revisions requested March 21, 2001; revisions received Aug 1, 2001; accepted for publication Aug 31, 2001. Address for reprints: M. Alvarez-Mon, MD, PhD, Departamento de Medicina, Universidad de Alcalá, Alcalá de Henares, 18.871, Madrid, Spain (E-mail: mams{at}tsai.es
Objective: The aim of this study was to determine the clinical significance of serum levels of interleukin 10 and interferon
in pediatric patients undergoing cardiopulmonary bypass.
Methods: We divided the patients into 2 groups: 8 neonates and 19 nonnewborn children. Interleukin 10 and interferon
serum levels were quantified before sternotomy, at admission to the pediatric intensive care unit (30 minutes postoperatively), 24 hours after the onset of the operation, and 3 days after the operation.
Results: Newborn patients displayed significantly greater amounts of serum interleukin 10 than older children, not only in regard to the peak level achieved but also at every postoperative time point analyzed. In contrast, no significant changes in interferon
serum levels were observed in neonates at any time point, whereas nonnewborn pediatric patients showed a significant increase in interferon
serum concentrations immediately after the operation. This unusual pattern of cytokine response in newborn patients was not associated with modifications in cortisol serum levels. Furthermore, although neonates had significantly different surgical and clinical variables than did the nonnewborn pediatric patients, the variation in interleukin 10 production in neonates could not be accounted for by differences in the magnitude of surgical injury. In the group of neonates, there were significant positive correlations between peak interleukin 10 serum levels and both partial pressure of arterial oxygen/fraction of inspired oxygen ratio and postoperative body weight gain.
Conclusions: Newborn patients undergoing cardiopulmonary bypass exhibit a distinctive biologic response pattern characterized by high levels of serum interleukin 10 without changes in serum interferon
. This cytokine imbalance could have potential clinical implications.
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