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Age-related differentiations of Th1/Th2 cytokines in newborn infants

Efthimia Protonotariou1, Ariadne Malamitsi-Puchner, Demetrios Rizos

  • 1Hormonological Laboratory, University of Athens, Aretaieion University Hospital, Paleon Phaliro, Greece.

Mediators of Inflammation
|June 19, 2004
PubMed

Insights

Newborns show distinct immune responses at birth, with high levels of interleukin-2 (IL-2) and interleukin-4 (IL-4) compared to interferon-gamma (IFN-gamma). This immune balance quickly regularizes in early neonatal life.

Area of Science:

  • Immunology
  • Neonatal Medicine
  • Pediatrics

Background:

  • The immune system undergoes significant development during the perinatal period.
  • Understanding early immune responses is crucial for neonatal health and development.

Purpose of the Study:

  • To investigate age-related immune response differentiation in newborns.
  • To measure serum concentrations of key cytokines: interleukin-2 (IL-2), interleukin-4 (IL-4), and interferon-gamma (IFN-gamma) during the perinatal period.

Main Methods:

  • Study included 57 healthy term neonates, their mothers, and 25 age-matched adult controls.
  • Cytokine concentrations were analyzed in umbilical cord (UC), first-day (1N), and fifth-day (5N) neonatal blood samples, alongside maternal serum (MS) and control serum.

Main Results:

  • IL-2 levels were high at UC, decreasing significantly by 5N.
  • IL-4 levels were elevated in neonates compared to maternal and control samples, remaining stable from UC to 5N.
  • IFN-gamma levels were lower at UC but increased significantly by 5N, with rising IFN-gamma/IL-2 and IFN-gamma/IL-4 ratios.

Conclusions:

  • Neonates exhibit a unique cytokine profile at birth, characterized by elevated IL-2 and IL-4 relative to IFN-gamma.
  • Immune system regulation appears to progress rapidly during the initial neonatal phase.
Abstract

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