Sex-dependent perturbations in risky choice behavior and prefrontal tyrosine hydroxylase levels induced by repetitive mild traumatic brain injury.

Autor: Knapp CP; Department of Cell Biology and Neuroscience, Rowan-Virtua School of Translational Biomedical Engineering and Sciences, 42 East Laurel Road, Suite 2200, Stratford, NJ 08084, USA. Electronic address: knappc0@rowan.edu., Papadopoulos E; Department of Cell Biology and Neuroscience, Rowan-Virtua School of Translational Biomedical Engineering and Sciences, 42 East Laurel Road, Suite 2200, Stratford, NJ 08084, USA. Electronic address: papado19@rowan.edu., Loweth JA; Department of Cell Biology and Neuroscience, Rowan-Virtua School of Translational Biomedical Engineering and Sciences, 42 East Laurel Road, Suite 2200, Stratford, NJ 08084, USA. Electronic address: loweth@rowan.edu., Raghupathi R; Department of Neurobiology and Anatomy, Drexel University College of Medicine, 2900 W. Queen Lane, Philadelphia, PA 19129, USA. Electronic address: rr79@drexel.edu., Floresco SB; Department of Psychology and Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2136 West Mall, Vancouver, BC V6T 1Z4, Canada. Electronic address: floresco@psych.ubc.ca., Waterhouse BD; Department of Cell Biology and Neuroscience, Rowan-Virtua School of Translational Biomedical Engineering and Sciences, 42 East Laurel Road, Suite 2200, Stratford, NJ 08084, USA. Electronic address: waterhouse@rowan.edu., Navarra RL; Department of Cell Biology and Neuroscience, Rowan-Virtua School of Translational Biomedical Engineering and Sciences, 42 East Laurel Road, Suite 2200, Stratford, NJ 08084, USA. Electronic address: navarra@rowan.edu.
Jazyk: angličtina
Zdroj: Behavioural brain research [Behav Brain Res] 2025 Jan 05; Vol. 476, pp. 115244. Date of Electronic Publication: 2024 Sep 04.
DOI: 10.1016/j.bbr.2024.115244
Abstrakt: Head trauma often impairs cognitive processes mediated within the prefrontal cortex (PFC), leading to impaired decision making and risk-taking behavior. Mild traumatic brain injury (mTBI) accounts for approximately 80 % of reported head injury cases. Most neurological symptoms of a single mTBI are transient; however, growing evidence suggests that repeated mTBI (rmTBI) results in more severe impairments that worsen with each subsequent injury. Although mTBI-induced disruption of risk/reward decision making has been characterized, the potential for rmTBI to exacerbate these effects and the neural mechanisms involved are unknown. Catecholamine neurotransmitters, dopamine (DA) and norepinephrine (NE), modulate PFC-mediated functions. Imbalances in catecholamine function have been associated with TBI and may underlie aberrant decision making. We used a closed head-controlled cortical impact (CH-CCI) model in rats to evaluate the effects of rmTBI on performance of a probabilistic discounting task of risk/reward decision making behavior and expression levels of catecholamine regulatory proteins within the PFC. RmTBI produced transient increases in risky choice preference in both male and female rats, with these effects persisting longer in females. Additionally, rmTBI increased expression of the catecholamine synthetic enzyme, tyrosine hydroxylase (TH), within the orbitofrontal (OFC) region of the PFC in females only. These results suggest females are more susceptible to rmTBI-induced disruption of risk/reward decision making behavior and dysregulation of catecholamine synthesis within the OFC. Together, using the CH-CCI model of rodent rmTBI to evaluate the effects of multiple insults on risk-taking behavior and PFC catecholamine regulation begins to differentiate how mTBI occurrences affect neuropathological outcomes across different sexes.
Competing Interests: Declaration of Competing Interest No competing financial interests exist.
(Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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