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CC BY-NC-ND 4.0 · Journal of Child Science 2017; 07(01): e110-e119
DOI: 10.1055/s-0037-1605579
Original Article
Georg Thieme Verlag KG Stuttgart · New York

Early Macrophage Activation in Preterm Newborns and Respiratory Disease

Anna Milan
1   Department of Women's and Children's Health, Neonatal Intensive Care Unit, Padova University Hospital, Padova, Italy
,
Elena Priante
1   Department of Women's and Children's Health, Neonatal Intensive Care Unit, Padova University Hospital, Padova, Italy
,
Daniel Nardo
1   Department of Women's and Children's Health, Neonatal Intensive Care Unit, Padova University Hospital, Padova, Italy
,
Francesca Tosato
2   Department of Laboratory Medicine, Padova University Hospital, Padova, Italy
,
Giorgia Pantano
2   Department of Laboratory Medicine, Padova University Hospital, Padova, Italy
,
Eugenio Baraldi
1   Department of Women's and Children's Health, Neonatal Intensive Care Unit, Padova University Hospital, Padova, Italy
,
Patrizia Zaramella
1   Department of Women's and Children's Health, Neonatal Intensive Care Unit, Padova University Hospital, Padova, Italy
› Author Affiliations
Further Information

Publication History

09 May 2017

10 July 2017

Publication Date:
08 August 2017 (online)

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Abstract

Monocyte-macrophages have a role in host defense and tissue remodeling. Classically activated (M1) and alternatively activated (M2) macrophages from preterm newborns are analyzed, and the role in acute respiratory distress syndrome (RDS) and bronchopulmonary dysplasia (BPD) is evaluated. Observational study was conducted on the blood samples (BSs) and tracheal aspirates (TAs) collected at 48 to 72 hours of life in preterm newborns. Flow-cytometry was performed to identify monocytes and M1 or M2. Prenatal factors, gestational age, birth weight, acute RDS and BPD were assessed and related to the M1 and M2 levels and M2/M1. One hundred nine subjects were included, and 100 were followed up. M1 and M2 increase and decrease, respectively, according to the gestational age and birth weight. Higher M2 and lower M1 levels in TAs were found after maternal chorioamnionitis. BPD patients have low M1 with high M2 in blood samples (BSs), as well as in tracheal aspirates (TAs). No relation was found between activation pattern and prenatal variables or the RDS grade. The correlation between gestational age or birth weight and M1 could reflect a more mature macrophage system, capable to push undifferentiated macrophages toward the classical pathway. We speculate that adequate early classical macrophage activation could be crucial to protect lungs from post-natal injuries, preventing the development of BPD.

Keywords

bronchopulmonary dysplasia - macrophage - preterm newborn - respiratory distress syndrome

Note

The study is a clinical research, conducted with financial and ethic supports of the University Padova Hospital (AOP 2724P/Nov 2012).


 

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