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Updated: Sep 18, 2025
Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats
Published on: November 20, 2015
Multi-organ involvement in preterm neonatal encephalopathy
Lynn Bitar1, Srinivas Kota1, Michelle Machie1
1Division of Neonatal-Perinatal Medicine, Department of Pediatrics, University of Texas Southwestern Medical Center and Children's Medical Center, Dallas, TX, USA.
Insights
Hypoxic-ischemic encephalopathy (HIE) in preterm infants frequently causes multiorgan dysfunction (MOD), impacting liver, heart, and kidneys. Early identification and management of MOD are vital for improving outcomes in this vulnerable population.
Area of Science:
- Neonatalogy
- Pediatric Neurology
- Critical Care Medicine
Background:
- Hypoxic-ischemic encephalopathy (HIE) is a severe birth complication.
- Multiorgan dysfunction (MOD) often accompanies HIE, particularly in term neonates.
- Focusing on preterm neonates is crucial due to critical brain development periods.
Purpose of the Study:
- Assess MOD incidence and severity in preterm neonates with HIE.
- Correlate MOD with brain MRI and EEG findings.
- Understand the impact of HIE on organ function in premature infants.
Main Methods:
- Retrospective cohort review of preterm neonates (<35 weeks' gestation) diagnosed with neonatal encephalopathy (NE).
- Analysis of cardiac, renal, and liver function using clinical and laboratory markers (e.g., troponin T, creatinine, AST, ALT).
- Evaluation of brain MRI/MRS and EEG abnormalities.
Main Results:
- 54 preterm neonates with HIE (0.4/1000 incidence) experienced significant MOD.
- High rates of liver (67%), cardiac (55%), and renal (37%) injury were observed.
- 19% mortality due to MOD complications; 35% had seizures, 68% abnormal EEG, 83% abnormal MRI.
Conclusions:
- MOD presents a substantial burden in preterm infants with HIE.
- Enhanced screening and management strategies for MOD are necessary.
- Vigilance for MOD is critical for developing neuroprotective interventions in preterm infants.
Background:
Hypoxic-ischemic encephalopathy (HIE) is a complex condition resulting from oxygen deprivation at birth. As the body redirects cardiac output to protect the brain, this can lead to multiorgan dysfunction (MOD). While most previous studies traditionally focused on term neonates with HIE, our goal was to focus on preterm neonates to study the effect on organs during critical periods of brain development. We aim to assess the incidence and severity of MOD in relation to brain magnetic resonance imaging (MRI) findings and electroencephalogram (EEG) abnormalities in this vulnerable population.
Methods:
Retrospective cohort review of preterm neonates (<35 weeks' gestation) with a diagnosis of neonatal encephalopathy (NE) admitted to the Neonatal Intensive Care Unit (NICU) at Parkland Hospital in Dallas between 2009 and 2023. MOD diagnosis of cardiac, renal, and liver function using clinical and laboratory markers, including echocardiography, serial troponin T, creatinine, urine output, as well as AST and ALT levels during the perinatal period.
Results:
During the study period, 54 preterm neonates (incidence 0.4/1000) were diagnosed with HIE. All of them had one or more organ injuries and the majority suffered from MOD: 67 % had liver injury (AST 277.0 [68.0, 686.8] IU/L), 55 % had cardiac injury (Troponin T 0.3 [0.2, 0.6] Ng/mL), and 37 % had renal injury (oliguria and creatinine 1.0 [0.8, 1.3]). Those values significantly decreased from Day 1 compared to Day 3 and 6 of life. Additionally, 35 % of newborns had electrographic seizures, 68 % had a discontinuous EEG background, and 83 % had brain MRI/MRS abnormalities supporting HIE. Death occurred in 10 (19 %) due to complications from MOD.
Conclusions:
By revealing the significant burden of MOD in preterm infants, this study highlights the need to refine screening and management strategies. Greater vigilance of MOD is crucial for future neuroprotective strategies in this vulnerable population.
