Related Experiment Video
Updated: Apr 17, 2026
08:46
A Neonatal Imaging Model of Gram-Negative Bacterial Sepsis
Published on: August 12, 2020
7.1K
Persistent systemic monocyte and neutrophil activation in neonatal encephalopathy
F M O'Hare1,2,3, R W G Watson2, A O'Neill2
1a Department of Paediatrics , National Maternity Hospital , Dublin , Ireland .
Summary
Infants needing resuscitation showed heightened immune cell activation and endotoxin response markers. This early immune dysregulation correlated with neonatal brain injury severity and mortality risk.
Area of Science:
- Neonatal immunology
- Neuroinflammation
- Systemic inflammatory response
Background:
- Circulating immune cell activation is linked to poor outcomes in brain injury.
- Neonatal encephalopathy (NE) is a critical condition requiring early assessment.
Purpose of the Study:
- To profile the systemic inflammatory response in infants at risk of NE during the first week of life.
- To correlate early immune cell activation and endotoxin responses with NE outcome.
Main Methods:
- Prospective observational study of 22 infants requiring resuscitation at birth.
- Serial measurements of neutrophil and monocyte CD11b, reactive oxygen intermediates (ROI), and Toll-like receptor 4 (TLR-4) expression.
- Ex vivo endotoxin stimulation and comparison with neonatal controls.
Main Results:
- Infants requiring resuscitation exhibited elevated neutrophil and monocyte CD11b and TLR-4 compared to controls.
- Increased CD11b, ROI, and TLR-4 were observed in neonates with abnormal neuroimaging or severe NE.
- Higher PMN TLR-4 expression correlated with increased mortality in NE infants.
Conclusions:
- Early innate immune dysregulation is associated with outcome severity in neonatal brain injury.
- These findings suggest potential targets for immunomodulatory therapies in NE.
