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Updated: Apr 29, 2026
Development of a Neonatal Piglet Acute Lung Injury Model Recreating the Early Environment of Preterm Infant Lungs
Published on: October 31, 2025
Patterns and etiology of acute and chronic lung injury: insights from experimental evidence
Matthias C Hütten1, Boris W Kramer
1Department of Pediatrics/Neonatology, University Clinic RWTH Aachen, Germany.
Insights
Preterm infant lung injury is linked to inflammation. This review covers animal models exploring prenatal and postnatal factors, including chorioamnionitis and treatments, to understand chronic lung disease development.
Area of Science:
- Neonatal Medicine
- Pulmonary Biology
- Inflammatory Disease Research
Background:
- Preterm infants possess structurally immature lungs, making them vulnerable to prenatal and postnatal injuries.
- Lung injury in preterm neonates can impede postnatal development, leading to chronic lung disease, such as bronchopulmonary dysplasia (BPD).
- Pulmonary inflammation plays a critical role in the pathogenesis of lung injury and impaired development in prematurity.
Purpose of the Study:
- To review experimental models elucidating pulmonary inflammation mechanisms in preterm infants.
- To examine the link between prenatal conditions like chorioamnionitis and intrapulmonary inflammation.
- To assess the impact of fetal and maternal factors, as well as postnatal interventions, on lung injury and development.
Main Methods:
- Overview of experimental animal models for studying pulmonary inflammation in prematurity.
- Analysis of experimental data on chorioamnionitis effects on lung maturation and surfactant production.
- Evaluation of experimental data on maternal administration of anti-inflammatory agents (e.g., glucocorticosteroids).
- Assessment of animal models investigating postnatal interventions (oxygen, steroids, surfactant, caffeine, vitamin A) for pulmonary inflammation and injury.
Main Results:
- Experimental data links chorioamnionitis to intrapulmonary inflammation and altered lung maturation in animal models.
- Fetal inflammatory response can be modulated, influencing lung function and maturation, as shown by studies on maternal glucocorticosteroid administration.
- Postnatal interventions like oxygen, steroids, and surfactant have been mechanistically assessed for their effects on pulmonary inflammation and injury in animal models.
Conclusions:
- Understanding the complex interplay between lung injury, inflammation, repair, and development is crucial for preterm infants.
- Experimental models provide insights into mechanisms underlying lung alterations in early life and their long-term respiratory consequences.
- Further research is needed to link early-life lung alterations to long-term adverse respiratory outcomes and to develop effective therapeutic strategies.
Abstract:
Adequate pulmonary function is pivotal for preterm infants. Besides being structurally immature, the preterm lung is susceptible to injury resulting from different prenatal conditions and postnatal insults. Lung injury might result in impaired postnatal lung development, contributing to chronic lung disease of prematurity, bronchopulmonary dysplasia (BPD). This review focuses on lung injury mediated by and related to inflammatory changes in the lung. We give an overview on experimental models which have helped to elucidate mechanisms of pulmonary inflammation in prematurity. We describe experimental data linking acute and chronic chorioamnionitis with intrapulmonary inflammation, lung maturation and surfactant production in various animal models. In addition, experimental data has shown that fetal inflammatory response is modulated by the fetus himself. Experimental data has therefore helped to understand differential effects on lung function and lung maturation exerted by maternal administration of potentially anti-inflammatory substances like glucocorticosteroids (GCS). New approaches of modulation of pulmonary inflammation/injury caused by postnatal interventions during resuscitation and mechanical ventilation have been studied in animal models. Postnatal therapeutic interventions with widely used drugs like oxygen, steroids, surfactant, caffeine and vitamin A have been experimentally and mechanistically assessed regarding their effect on pulmonary inflammation and lung injury. Carefully designed experiments will help to elucidate the complex interaction between lung injury, lung inflammation, repair and altered lung development, and will help to establish a link between lung alterations originating in this early period of life and long-term adverse respiratory effects.
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