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Inflammatory signatures and immunomodulation in neonates: a pilot study.

L Leonardi1, V Pennetta1, R Laitano2

  • 1Department of Maternal Infantile and Urological Sciences, Sapienza University of Rome, Rome, Italy.

La Clinica Terapeutica
|June 17, 2025
PubMed
Summary

Newborns exhibit distinct inflammatory responses compared to adults. Full-term newborns showed heightened IL-6 and TNF-α after TLR7/8 stimulation, suggesting potential vaccine adjuvant applications.

Keywords:
CMVTLRscytokinesimmunomodulationinflammationnewbornpreterm

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Area of Science:

  • Immunology
  • Neonatal Health
  • Infectious Disease Management

Background:

  • Precise diagnosis of inflammatory responses is crucial for managing infectious diseases.
  • Dysregulated inflammation in neonates, particularly newborns, presents unique challenges due to immature immune systems.
  • Understanding neonatal immune responses is key to developing future immunomodulatory therapies.

Purpose of the Study:

  • To characterize inflammatory signatures in preterm newborns, full-term newborns, and healthy adults.
  • To compare basal and Toll-like receptor (TLR)-induced cytokine responses across these groups.
  • To investigate the impact of in-utero Cytomegalovirus (CMV) exposure on neonatal inflammatory profiles.

Main Methods:

  • Whole-blood approach to quantify cytokine production.
  • Stimulation of blood samples with Toll-like receptor (TLR) ligands (TLR1/2, TLR4, TLR7/8).
  • Analysis of cytokine concentrations including IL-6, TNF-α, CXCL8, and IL-10.

Main Results:

  • Full-term newborns showed significantly higher IL-6 and TNF-α concentrations after TLR7/8 stimulation compared to other groups.
  • TLR7/8 stimulation potentiated pro-inflammatory responses (IL-6, TNF-α, CXCL8) in adults, while preterm newborns showed elevated TNF-α.
  • Preterm newborns exhibited increased TLR1/2-induced IL-10, indicating altered inflammatory and immunosuppressive states.

Conclusions:

  • Pilot results support further investigation into age-group differences in immune responses.
  • TLR7/8 ligands show promise as potential vaccine adjuvant candidates for newborns.
  • IL-10-targeted immunomodulation may offer therapeutic strategies for neonatal inflammatory diseases.