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Septic shock is the most severe clinical manifestation of meningococcal disease and is predominantly seen in children under 5 yr of age. Very limited research has been performed to elucidate the alterations of the GH/IGF-I axis in critically ill children. We evaluated the GH/IGF-I axis and the levels of IGF-binding proteins (IGFBPs), IGFBP-3 protease, glucose, insulin, and cytokines in 27 children with severe septic shock due to meningococcal sepsis during the first 3 d after admission. The median age was 22 months (range, 4-185 months). Eight patients died. Nonsurvivors had extremely high GH levels that were significant different compared with mean GH levels in survivors during a 6-h GH profile (131 vs. 7 mU/liter; P &lt; 0.01). Significant differences were found between nonsurvivors and survivors for the levels of total IGF-I (2.6 vs. 5.6 nmol/liter), free IGF-I (0.003 vs. 0.012 nmol/liter), IGFBP-1 (44.3 vs. 8.9 nmol/liter), IGFBP-3 protease activity (61 vs. 32%), IL-6 (1200 vs. 50 ng/ml), and TNFalpha (34 vs. 5.3 pg/ml; P &lt; 0.01). The pediatric risk of mortality score correlated significantly with levels of IGFBP-1, IGFBP-3 protease activity, IL-6, and TNFalpha (r = +0.45 to +0.69) and with levels of total IGF-I and free IGF-I (r = -0.44 and -0.55, respectively). Follow-up after 48 h in survivors showed an increased number of GH peaks, increased free IGF-I and IGFBP-3 levels, and lower IGFBP-1 levels compared with admission values. GH levels and IGFBP-1 levels were extremely elevated in nonsurvivors, whereas total and free IGF-I levels were markedly decreased and were accompanied by high levels of the cytokines IL-6 and TNFalpha. These values were different from those for the survivors. Based on these findings and literature data a hypothetical model was constructed summarizing our current knowledge and understanding of the various mechanisms.

the journal of clinical endocrinology and metabolism/journal of clinical endocrinology and metabolism

Acute Stress Response in Children with Meningococcal Sepsis: Important Differences in the Growth Hormone/Insulin-Like Growth Factor I Axis between Nonsurvivors and Survivors