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Updated: Jun 6, 2026

A Neonatal Imaging Model of Gram-Negative Bacterial Sepsis

A Neonatal Imaging Model of Gram-Negative Bacterial Sepsis

Published on: August 12, 2020

Proteomics and neonatal infection.

G Vento¹, C Tirone, C Aurilia

¹Div. of Neonatology, Università Cattolica S. Cuore, Roma.

Minerva Pediatrica

|November 25, 2010

Summary

Preterm newborns, even those born very early, produce crucial antimicrobial peptides for innate defense. This highlights the early activation of their immune systems before full term.

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Mapping Infant Immunity with Minimal Input: Integrative Single-Cell and Multiomic Profiling

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Last Updated: Jun 6, 2026

A Neonatal Imaging Model of Gram-Negative Bacterial Sepsis

A Neonatal Imaging Model of Gram-Negative Bacterial Sepsis

Published on: August 12, 2020

Mapping Infant Immunity with Minimal Input: Integrative Single-Cell and Multiomic Profiling

Mapping Infant Immunity with Minimal Input: Integrative Single-Cell and Multiomic Profiling

Published on: April 3, 2026

Area of Science:

Immunology
Neonatology
Biochemistry

Background:

Antimicrobial peptides are vital components of the innate immune system in humans.
Human airway epithelial cells can synthesize antimicrobial peptides, contributing to primary immunity.
The role of these peptides in early-life immunity, particularly in preterm infants, requires further investigation.

Purpose of the Study:

To investigate the presence of cathelicidin antimicrobial peptides (ct-defensins) in the bronchoalveolar lavage fluid (BALF) of preterm newborns.
To determine if preterm infants, especially those with very low gestational age, can produce these essential immune molecules.

Main Methods:

Analysis of bronchoalveolar lavage fluid (BALF) samples from a cohort of preterm newborns with gestational age (GA) less than or equal to 30 weeks.
Utilized High-Performance Liquid Chromatography Electrospray Ionization Mass Spectrometry (HPLC-ESI-MS) for precise peptide detection.

Main Results:

Detection of ct-defensins in the BALF of preterm newborns, including those with very low gestational age (GA < or = 30 weeks).
Demonstrated that the innate defense system of preterm infants is active and capable of producing antimicrobial peptides prior to the expected full-term delivery date.

Conclusions:

Preterm newborns possess a functional innate defense mechanism involving the production of antimicrobial peptides.
The findings underscore the importance of antimicrobial peptides in protecting vulnerable preterm infants from infection.
This study provides evidence for the early maturation of the immune system in preterm neonates.