Abstract |
Metabolic dysfunction occurring after traumatic brain injury (TBI) is an important risk factor for the development of psychiatric illness. In the present study, we utilized an omega-3 diet during early life as a metabolic preconditioning to alter the course of TBI during adulthood. TBI animals under omega-3 deficiency were more prone to alterations in energy homeostasis ( adenosine monophosphate-activated protein kinase; AMPK phosphorylation and cytochrome C oxidase II; COII levels) and mitochondrial biogenesis ( peroxisome proliferator-activated receptor gamma coactivator 1-alpha; PGC-1α and mitochondrial transcription factor A; TFAM). A similar response was found for brain-derived neurotrophic factor ( BDNF) and its signaling through tropomyosin receptor kinase B (TrkB). The results from in vitro studies showed that 7,8-dihydroxyflavone (7,8-DHF), a TrkB receptor agonist, upregulates the levels of biogenesis activator PGC-1α, and CREB phosphorylation in neuroblastoma cells suggesting that BDNF-TrkB signaling is pivotal for engaging signals related to synaptic plasticity and energy metabolism. The treatment with 7,8-DHF elevated the mitochondrial respiratory capacity, which emphasizes the role of BDNF-TrkB signaling as mitochondrial bioenergetics stimulator. Omega-3 deficiency worsened the effects of TBI on anxiety-like behavior and potentiated a reduction of anxiolytic neuropeptide Y1 receptor (NPY1R). These results highlight the action of metabolic preconditioning for building long-term neuronal resilience against TBI incurred during adulthood. Overall, the results emphasize the interactive action of metabolic and plasticity signals for supporting neurological health.
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Authors | Rahul Agrawal, Ethika Tyagi, Laurent Vergnes, Karen Reue, Fernando Gomez-Pinilla |
Journal | Biochimica et biophysica acta
(Biochim Biophys Acta)
Vol. 1842
Issue 4
Pg. 535-46
(Apr 2014)
ISSN: 0006-3002 [Print] Netherlands |
PMID | 24345766
(Publication Type: Journal Article, Research Support, N.I.H., Extramural)
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Copyright | Copyright © 2013. Published by Elsevier B.V. |
Chemical References |
- Brain-Derived Neurotrophic Factor
- Fatty Acids, Omega-3
- Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha
- Ppargc1a protein, rat
- Transcription Factors
- Receptor, trkB
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Topics |
- Animals
- Anxiety
(etiology)
- Brain Injuries
(metabolism)
- Brain-Derived Neurotrophic Factor
(physiology)
- Energy Metabolism
- Fatty Acids, Omega-3
(administration & dosage)
- Female
- Homeostasis
- Mitochondria
(physiology)
- Neuronal Plasticity
- Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha
- Rats
- Rats, Sprague-Dawley
- Receptor, trkB
(physiology)
- Signal Transduction
- Transcription Factors
(analysis)
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