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A Pediatric Concussion Model in Mice: Closed Head Injury with Long-Term Disorders (CHILD)
Published on: February 7, 2025
Pediatric Rodent Models of Traumatic Brain Injury
Bridgette D Semple1, Jaclyn Carlson1, Linda J Noble-Haeusslein2,3
1Department of Medicine, Royal Melbourne Hospital, The University of Melbourne, Parkville, VIC, Australia.
Insights
Pediatric traumatic brain injury (TBI) research requires age-specific models to understand long-term effects on the developing brain. These adapted preclinical models are crucial for evaluating treatments to improve outcomes for children with TBI.
Area of Science:
- Neuroscience
- Pediatric Traumatology
- Developmental Biology
Background:
- Traumatic brain injury (TBI) significantly impacts children and adolescents.
- Understanding the developing brain's unique vulnerabilities to injury is critical.
- Existing TBI models often need adaptation for pediatric use.
Purpose of the Study:
- To review adapted preclinical models for pediatric traumatic brain injury (TBI).
- To emphasize the importance of age equivalence in model development and interpretation.
- To highlight the need for long-term outcome evaluation in pediatric TBI research.
Main Methods:
- Discussion of experimental TBI models adapted from adult rodents for juvenile animals.
- Focus on age-specific considerations in preclinical research.
- Review of neuropathological mechanisms influenced by age at insult.
Main Results:
- Adapted preclinical models are essential for studying pediatric TBI.
- Age equivalence is a key factor in model validity.
- Long-term functional outcome assessment is imperative for understanding developmental TBI consequences.
Conclusions:
- Age-specific models are necessary for understanding pediatric TBI.
- Research should focus on age-appropriate preclinical models and long-term outcomes.
- Interventions supporting normal brain development can improve quality of life for children with TBI.
Abstract:
Due to a high incidence of traumatic brain injury (TBI) in children and adolescents, age-specific studies are necessary to fully understand the long-term consequences of injuries to the immature brain. Preclinical and translational research can help elucidate the vulnerabilities of the developing brain to insult, and provide model systems to formulate and evaluate potential treatments aimed at minimizing the adverse effects of TBI. Several experimental TBI models have therefore been scaled down from adult rodents for use in juvenile animals. The following chapter discusses these adapted models for pediatric TBI, and the importance of age equivalence across species during model development and interpretation. Many neurodevelopmental processes are ongoing throughout childhood and adolescence, such that neuropathological mechanisms secondary to a brain insult, including oxidative stress, metabolic dysfunction and inflammation, may be influenced by the age at the time of insult. The long-term evaluation of clinically relevant functional outcomes is imperative to better understand the persistence and evolution of behavioral deficits over time after injury to the developing brain. Strategies to modify or protect against the chronic consequences of pediatric TBI, by supporting the trajectory of normal brain development, have the potential to improve quality of life for brain-injured children.
