Inflammation at birth is associated with subnormal development in very preterm infants

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Ingrid Hansen-Pupp1, Anne-Li Hallin, Lena Hellström-Westas

  • 1Department of Pediatrics, Lund University Hospital, Lund, Sweden. ingrid.pupp@skane.se

Pediatric Research
|April 9, 2008
PubMed

Insights

Inflammation shortly after birth is linked to developmental problems in very preterm infants. Elevated levels of tumor necrosis factor-alpha (TNF-alpha) and interleukin-6 (IL-6) correlate with lower psychomotor scores and cerebral palsy.

Area of Science:

  • Neonatal Medicine
  • Developmental Pediatrics
  • Immunology

Background:

  • Preterm birth is a significant risk factor for impaired neurodevelopmental outcomes.
  • Previous research linked early postnatal inflammation to cerebral damage in very preterm infants.
  • This study investigates the association between neonatal inflammatory markers and functional outcomes at 2 years corrected age.

Purpose of the Study:

  • To determine if proinflammatory cytokine concentrations at birth predict adverse developmental outcomes in very preterm infants.
  • To assess the relationship between specific cytokines (TNF-alpha, IL-6, IL-8) and neurodevelopmental indices, including psychomotor scores and cerebral palsy.

Main Methods:

  • A cohort of 71 very preterm infants (mean gestational age 27.1 weeks) were assessed at 2 years corrected age.
  • Standardized neurologic examinations and Bayley Scales of Infant Development were used for outcome assessment.
  • Concentrations of tumor necrosis factor-alpha (TNF-alpha), interleukin-6 (IL-6), and interleukin-8 (IL-8) in cord blood and at 6 hours postnatal were measured.

Main Results:

  • Elevated TNF-alpha in cord blood was associated with a psychomotor developmental index below 85 (OR 3.3) and cerebral palsy (OR 3.6).
  • Increased IL-6 in cord blood correlated with a psychomotor developmental index below 85 (OR 1.7).
  • Higher IL-8 concentrations in cord blood were linked to cerebral palsy (OR 3.5).
  • These associations remained significant after adjusting for clinical variables.

Conclusions:

  • Proinflammation at birth is significantly associated with impaired functional outcomes at 2 years corrected age in very preterm infants.
  • Neonatal cytokine levels, particularly TNF-alpha and IL-8, are predictive of neurodevelopmental deficits and cerebral palsy.
  • Early inflammatory markers may serve as potential targets for interventions to improve outcomes in this vulnerable population.

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