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Metabolic perturbations after pediatric TBI: It's not just about glucose
Caitlyn E Bowman1, Joseph Scafidi2, Susanna Scafidi3
1Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD 21205, United States.
Insights
Pediatric traumatic brain injury (TBI) recovery requires understanding metabolic changes beyond glucose. This review explores how altering brain energy substrate utilization, including lipids and amino acids, can improve outcomes for children with TBI.
Area of Science:
- Neuroscience
- Metabolic Research
- Pediatric Traumatology
Background:
- Improved survival in pediatric traumatic brain injury (TBI) highlights gaps in understanding metabolic recovery.
- Current research primarily focuses on glucose metabolism, neglecting other vital energy pathways in the immature brain.
Purpose of the Study:
- To review metabolic perturbations in the pediatric brain following TBI.
- To explore the role of various energy substrates (glucose, lipids, ketone bodies, amino acids) in TBI recovery.
- To discuss therapeutic strategies targeting substrate utilization for improved pediatric TBI outcomes.
Main Methods:
- Literature review of studies on pediatric TBI and brain metabolism.
- Analysis of metabolic pathways involving glucose, lipids, ketone bodies, and amino acids post-injury.
- Synthesis of findings to identify therapeutic targets.
Main Results:
- Pediatric TBI significantly alters brain metabolism beyond glucose pathways.
- The immature brain utilizes alternative substrates, necessitating a broader metabolic investigation.
- Dysregulation in lipid, ketone body, and amino acid metabolism are implicated in TBI recovery.
Conclusions:
- A comprehensive understanding of all brain energy substrates is crucial for pediatric TBI.
- Targeting substrate utilization offers promising therapeutic avenues for improving pediatric TBI outcomes.
- Further research into non-glucose metabolic pathways is essential for effective interventions.
Abstract:
Improved patient survival following pediatric traumatic brain injury (TBI) has uncovered a currently limited understanding of both the adaptive and maladaptive metabolic perturbations that occur during the acute and long-term phases of recovery. While much is known about the redundancy of metabolic pathways that provide adequate energy and substrates for normal brain growth and development, the field is only beginning to characterize perturbations in these metabolic pathways after pediatric TBI. To date, the majority of studies have focused on dysregulated oxidative glucose metabolism after injury; however, the immature brain is well-equipped to use alternative substrates to fuel energy production, growth, and development. A comprehensive understanding of metabolic changes associated with pediatric TBI cannot be limited to investigations of glucose metabolism alone. All energy substrates used by the brain should be considered in developing nutritional and pharmacological interventions for pediatric head trauma. This review summarizes post-injury changes in brain metabolism of glucose, lipids, ketone bodies, and amino acids with discussion of the therapeutic potential of altering substrate utilization to improve pediatric TBI outcomes.