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Clinical Chemistry and Laboratory Medicine (CCLM)

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Age-Specific Analysis of Normal Cytokine Levels in Healthy Infants

Pascal A. Berdat / Thomas J. Wehrle / Angelika Küng / François Achermann / Martin Sutter / Thierry P. Carrel / Urs E. Nydegger

Citation Information: Clinical Chemistry and Laboratory Medicine. Volume 41, Issue 10, Pages 1335–1339, ISSN (Print) 1434-6621, DOI: 10.1515/CCLM.2003.204, June 2005

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While pathophysiology of elevated cytokines is well delineated, reference values for children are unknown, although they may vary physiologically with age and differ from those of adults. Between June and November 2001, interleukin (IL)-6, IL-10 and tumor necrosis factor-α (TNF-α) concentrations from blood samples of 79 healthy children in six different age groups (group I: 03 months; group II: 4-12 months; group III: 13-24 months; group IV: 25-36 months; group V: 37-48 months; group VI: 49-60 months) were measured with ELISA. TNF-α was within 2.2-3.5 pg/ml in all groups with a trend toward higher values in groups II and III (p = ns). IL-6 was significantly lower in group III than in groups IV (p = 0.0165) and VI (p = 0.0147). IL-10 was within 3.35.5 pg/ml in all groups (p = ns). In regression analysis no correlation between age and cytokine concentrations was found. Although not statistically significant, IL-6 was lower and TNF-α higher than the adult reference values provided by the kit manufacturer. Although reference cytokine levels seem not agerelated during early infancy, IL-6 is significantly lower during the second year of life than later. In infants aged 5 years or younger, reference levels of IL-6 should be chosen lower, and those of TNF-α higher, than the adult reference values. Clin Chem Lab Med 2003; 41(10):13351339

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