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Immature neutrophils in cord blood exert increased expression of genes associated with antimicrobial function
Eliška Miková1, Viktor Černý1, Olga Novotná1
1Institute of Immunology and Microbiology, First Faculty of Medicine, Charles University, Prague, Czechia.
Insights
Newborns possess immature low-density neutrophils in cord blood that are crucial for early immune defense. These neutrophils express genes vital for fighting infections, supporting neonatal survival.
Area of Science:
- Immunology
- Neonatal Health
Background:
- Neonatal immune system is immature, relying heavily on innate immunity for protection.
- Neutrophils play a critical role in neonatal immune surveillance post-birth.
Purpose of the Study:
- Investigate the properties of neutrophils in newborn cord blood.
- Understand the role of neutrophils in neonatal immune defense.
Main Methods:
- Analysis of neutrophils from newborn cord blood.
- Utilized various methodological approaches to characterize neutrophil properties.
Main Results:
- Identified immature low-density neutrophils in cord blood.
- Observed elevated gene expression for antimicrobial proteins like myeloperoxidase, neutrophil elastase, and defensins.
Conclusions:
- These immature neutrophils likely support normal neonatal protection against infections.
- Mode of delivery may influence neutrophil programming and function.
- Distinct neutrophil subpopulations are important for neonatal immunity and postnatal health.
Introduction:
The immune systems of both the mother and the newborn face significant challenges during birth. Proper immune regulation after birth is essential for the survival of neonates. Numerous studies have demonstrated that the neonatal immune system is relatively immature, particularly in its adaptive arm, placing the primary responsibility for immune surveillance on innate immunity.
Methods:
Given the significant role of neutrophils in protecting the neonate after birth, we conducted a study investigating the properties of neutrophils in newborn cord blood using various methodological approaches.
Results:
Our findings demonstrate the presence of immature low-density neutrophils in the cord blood, which are likely responsible for the observed elevated expression of genes coding for proteins essential to antimicrobial response, including myeloperoxidase, neutrophils elastase, and defensins.
Discussion:
We propose that these cells function normally and support the protection of newborns early after birth. Furthermore, our results suggest that the mode of delivery might significantly influence the programming of neutrophil function. The presented findings emphasize the importance of distinct neutrophil subpopulations in neonatal immunity and their potential impact on early postnatal health.
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