Correlation between serum caffeine levels and changes in cytokine profile in a cohort of preterm infants

Raul Chavez Valdez, Rajni Ahlawat, Marsha Wills-Karp, Amy Nathan, Tarrah Ezell, Estelle B. Gauda

Research output: Contribution to journalArticlepeer-review

Abstract

Objective: To determine changes in cytokine levels associated with caffeine treatment in a cohort of preterm infants. Study design: For this observational prospective study, we collected clinical data from 26 preterm infants (≤30 weeks gestational age). In addition to caffeine levels, cytokine profiles in peripheral blood (PB) and tracheal aspirates (TA) were determined with enzyme-linked immunosorbent assay at birth, before and after (at 24 hours and 1 week) initiation of caffeine. Non-parametric statistics were applied. Results: Included infants were 26.9 ± 1.7 weeks gestational age and weighed 985 ± 202 g. At birth, all cytokine concentrations were significantly greater in TA than PB. Serum caffeine levels were 11.1 μg/mL (interquartile range, 1.85) at approximately 24 hours post-load and 16.4 (8.7) μg/mL at 1 week on treatment. At approximately 24 hours post-load, interleukin (IL)-10 levels decreased by 47.5% (P = .01) in PB and 38.5% (P = .03) in TA, whereas other cytokine levels remained unchanged. At 1 week, caffeine levels were correlated (U-shaped) with changes in proinflammatory tumor necrosis factor-α (R 2 = 0.65; P = .0008), interleukin (IL)-1β (R2 = 0.73; P = .0007), and IL-6 (R2 = 0.59; P = .003), whereas inversely correlated (linear) with the anti-inflammatory IL-10 (R2 = 0.64; P = .0008). Altogether, caffeine, at serum levels ≥20 μg/mL, was associated with a proinflammatory profile after 1 week of treatment. Conclusions: Caffeine treatment for apnea of prematurity correlates with changes in cytokine profile. Caffeine levels ≥20 μg/mL are associated with a proinflammatory profile in our cohort of preterm infants.

Original languageEnglish (US)
Pages (from-to)57-64.e1
JournalJournal of Pediatrics
Volume158
Issue number1
DOIs
StatePublished - Jan 2011

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health

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