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Cytokine and S100B levels in paediatric patients undergoing corrective cardiac surgery with or without total circulatory arrest.

Abstract

OBJECTIVES

Neurological damage following cardiopulmonary bypass (CPB) is difficult to objectively evaluate in infants. In adults, serum elevations of astroglial S100B correlate with proven brain injury independent of operative temperature. The deleterious effects of inflammatory cytokines, generated during CPB, on the brain have not been studied in infants using S100B as a marker for cerebral injury.

METHODS

Twelve neonates, weighing 3.3 +/- 0.2 kg (total circulatory arrest group (TCA)) and 12 infants weighing 7.0 +/- 1.0 kg (cardiopulmonary bypass group (CPB)) underwent corrective cardiac surgery for various pathologies. Serial blood samples on induction, at the end of CPB, 30 min, 2 h and 24 h after the administration of protamine, were taken. The resultant plasma was frozen to -80 degrees C and stored for batch analysis. Cytokines were measured using ELISAs and S100B using a luminometric assay.

RESULTS

The TCA group were younger and experienced a longer perfusion time than the CPB group (137 +/- 8 vs. 113 +/- 7, P = 0.04). The mean TCA time was 23 +/- 4 min. The TCA group had significantly higher levels of IL-6 (P = 0.001), IL-8 (P = 0.005) and S100B (P = 0.002) at 24 h. C5b-9 levels were significantly lower in the TCA group: end of CPB (P = 0.001), 30 min (P < 0.001), 2 h (P = 0.002). There was a weak, but significant correlation between IL-6 levels at the end of CPB and S100B levels 2 h later (r = 0.55, P = 0.03). Long extubation times were associated with high 24-h S100B levels (r = 0.52, P = 0.01).

CONCLUSIONS

(1) The TCA group have prolonged rises of IL-6, IL-8 and S100B. (2) The TCA group generates significantly lower complement. (3) Astroglial injury, seen after surgery, may, in part, be cytokine mediated.

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  • Authors+Show Affiliations

    ,

    Yorkshire Heart Centre, Leeds General Infirmary, UK.

    , ,

    Source

    MeSH

    Antibodies, Monoclonal
    Biomarkers
    Brain Injuries
    Cardiopulmonary Bypass
    Cytokines
    Heart Arrest, Induced
    Heart Defects, Congenital
    Humans
    Infant
    Infant, Newborn
    S100 Proteins

    Pub Type(s)

    Journal Article

    Language

    eng

    PubMed ID

    10456399

    Citation

    TY - JOUR T1 - Cytokine and S100B levels in paediatric patients undergoing corrective cardiac surgery with or without total circulatory arrest. AU - Ashraf,S, AU - Bhattacharya,K, AU - Tian,Y, AU - Watterson,K, PY - 1999/8/24/pubmed PY - 1999/8/24/medline PY - 1999/8/24/entrez SP - 32 EP - 7 JF - European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery JO - Eur J Cardiothorac Surg VL - 16 IS - 1 N2 - OBJECTIVES: Neurological damage following cardiopulmonary bypass (CPB) is difficult to objectively evaluate in infants. In adults, serum elevations of astroglial S100B correlate with proven brain injury independent of operative temperature. The deleterious effects of inflammatory cytokines, generated during CPB, on the brain have not been studied in infants using S100B as a marker for cerebral injury. METHODS: Twelve neonates, weighing 3.3 +/- 0.2 kg (total circulatory arrest group (TCA)) and 12 infants weighing 7.0 +/- 1.0 kg (cardiopulmonary bypass group (CPB)) underwent corrective cardiac surgery for various pathologies. Serial blood samples on induction, at the end of CPB, 30 min, 2 h and 24 h after the administration of protamine, were taken. The resultant plasma was frozen to -80 degrees C and stored for batch analysis. Cytokines were measured using ELISAs and S100B using a luminometric assay. RESULTS: The TCA group were younger and experienced a longer perfusion time than the CPB group (137 +/- 8 vs. 113 +/- 7, P = 0.04). The mean TCA time was 23 +/- 4 min. The TCA group had significantly higher levels of IL-6 (P = 0.001), IL-8 (P = 0.005) and S100B (P = 0.002) at 24 h. C5b-9 levels were significantly lower in the TCA group: end of CPB (P = 0.001), 30 min (P < 0.001), 2 h (P = 0.002). There was a weak, but significant correlation between IL-6 levels at the end of CPB and S100B levels 2 h later (r = 0.55, P = 0.03). Long extubation times were associated with high 24-h S100B levels (r = 0.52, P = 0.01). CONCLUSIONS: (1) The TCA group have prolonged rises of IL-6, IL-8 and S100B. (2) The TCA group generates significantly lower complement. (3) Astroglial injury, seen after surgery, may, in part, be cytokine mediated. SN - 1010-7940 UR - https://www.unboundmedicine.com/medline/citation/10456399/Cytokine_and_S100B_levels_in_paediatric_patients_undergoing_corrective_cardiac_surgery_with_or_without_total_circulatory_arrest_ L2 - http://ovidsp.ovid.com/ovidweb.cgi?T=JS&amp;PAGE=linkout&amp;SEARCH=10456399.ui ER -