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Influence of Sex and Muscarinic Activity on Memory Retrieval in Mouse Model of Traumatic Brain Injury. Brain Sci 2023; 13:brainsci13010108. [PMID: 36672089 PMCID: PMC9857320 DOI: 10.3390/brainsci13010108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 12/25/2022] [Accepted: 01/03/2023] [Indexed: 01/09/2023] Open
Abstract
Traumatic brain injury (TBI) is a serious global risk factor leading to the onset of cognitive impairment and neurodegenerative diseases. Cognitive and memory impairment following a TBI is associated with the dysregulation of cholinergic neurotransmission in the brains of subjects. The extent of memory impairment following a TBI is linked with the sex of the subject. This study aimed to identify the sex-dimorphic role of muscarinic cholinergic modulation in neurological functioning and episodic memory retrieval in a mouse model of TBI. Balb/c mice were divided into four groups of males and four groups of females (i.e., Sham, TBI, TBI + Scopolamine 1 mg/kg, and TBI + Donepezil 1 mg/kg). After training with the Morris water maze test and fear conditioning, all groups were subjected to brain injury (7.84 × 10-5 J impact force) except for the Sham mice. Following brain injury, scopolamine or donepezil was administered to the respective groups for 5 days. Acute scopolamine immediately after brain trauma showed a neuroprotective effect in the males only, while subchronic donepezil significantly impaired neurological functioning in both sexes. Subchronic scopolamine and donepezil treatment reversed the TBI-induced retrograde amnesia for spatial memory in male mice. Contextual fear memory retrieval was not affected by the TBI and treatments in both sexes. Thus, we concluded that the sex-dimorphic response of the muscarinic receptors in TBI-induced memory impairment depends on the type of memory. This study highlights the potential for therapeutic modalities in TBI subjects.
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Schumm SN, Gabrieli D, Meaney DF. Plasticity impairment alters community structure but permits successful pattern separation in a hippocampal network model. Front Cell Neurosci 2022; 16:977769. [PMID: 36505514 PMCID: PMC9729278 DOI: 10.3389/fncel.2022.977769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 10/25/2022] [Indexed: 11/25/2022] Open
Abstract
Patients who suffer from traumatic brain injury (TBI) often complain of learning and memory problems. Their symptoms are principally mediated by the hippocampus and the ability to adapt to stimulus, also known as neural plasticity. Therefore, one plausible injury mechanism is plasticity impairment, which currently lacks comprehensive investigation across TBI research. For these studies, we used a computational network model of the hippocampus that includes the dentate gyrus, CA3, and CA1 with neuron-scale resolution. We simulated mild injury through weakened spike-timing-dependent plasticity (STDP), which modulates synaptic weights according to causal spike timing. In preliminary work, we found functional deficits consisting of decreased firing rate and broadband power in areas CA3 and CA1 after STDP impairment. To address structural changes with these studies, we applied modularity analysis to evaluate how STDP impairment modifies community structure in the hippocampal network. We also studied the emergent function of network-based learning and found that impaired networks could acquire conditioned responses after training, but the magnitude of the response was significantly lower. Furthermore, we examined pattern separation, a prerequisite of learning, by entraining two overlapping patterns. Contrary to our initial hypothesis, impaired networks did not exhibit deficits in pattern separation with either population- or rate-based coding. Collectively, these results demonstrate how a mechanism of injury that operates at the synapse regulates circuit function.
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Affiliation(s)
- Samantha N. Schumm
- Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, United States
| | - David Gabrieli
- Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, United States
| | - David F. Meaney
- Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, United States
- Department of Neurosurgery, Penn Center for Brain Injury and Repair, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
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Zheng L, Pang Q, Xu H, Guo H, Liu R, Wang T. The Neurobiological Links between Stress and Traumatic Brain Injury: A Review of Research to Date. Int J Mol Sci 2022; 23:ijms23179519. [PMID: 36076917 PMCID: PMC9455169 DOI: 10.3390/ijms23179519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/17/2022] [Accepted: 08/21/2022] [Indexed: 11/16/2022] Open
Abstract
Neurological dysfunctions commonly occur after mild or moderate traumatic brain injury (TBI). Although most TBI patients recover from such a dysfunction in a short period of time, some present with persistent neurological deficits. Stress is a potential factor that is involved in recovery from neurological dysfunction after TBI. However, there has been limited research on the effects and mechanisms of stress on neurological dysfunctions due to TBI. In this review, we first investigate the effects of TBI and stress on neurological dysfunctions and different brain regions, such as the prefrontal cortex, hippocampus, amygdala, and hypothalamus. We then explore the neurobiological links and mechanisms between stress and TBI. Finally, we summarize the findings related to stress biomarkers and probe the possible diagnostic and therapeutic significance of stress combined with mild or moderate TBI.
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Affiliation(s)
- Lexin Zheng
- Department of Forensic Medicine, School of Basic Medicine and Biological Sciences, Soochow University, Suzhou 215123, China
| | - Qiuyu Pang
- Department of Forensic Medicine, School of Basic Medicine and Biological Sciences, Soochow University, Suzhou 215123, China
| | - Heng Xu
- Department of Forensic Medicine, School of Basic Medicine and Biological Sciences, Soochow University, Suzhou 215123, China
| | - Hanmu Guo
- Department of Forensic Medicine, School of Basic Medicine and Biological Sciences, Soochow University, Suzhou 215123, China
| | - Rong Liu
- Department of Forensic Medicine, School of Basic Medicine and Biological Sciences, Soochow University, Suzhou 215123, China
| | - Tao Wang
- Department of Forensic Medicine, School of Basic Medicine and Biological Sciences, Soochow University, Suzhou 215123, China
- Shanghai Key Lab of Forensic Medicine, Key Lab of Forensic Science, Ministry of Justice, China (Academy of Forensic Science), Shanghai 200063, China
- Correspondence:
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Fitzgerald J, Houle S, Cotter C, Zimomra Z, Martens KM, Vonder Haar C, Kokiko-Cochran ON. Lateral Fluid Percussion Injury Causes Sex-Specific Deficits in Anterograde but Not Retrograde Memory. Front Behav Neurosci 2022; 16:806598. [PMID: 35185489 PMCID: PMC8854992 DOI: 10.3389/fnbeh.2022.806598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 01/11/2022] [Indexed: 11/13/2022] Open
Abstract
Cognitive impairment is a common symptom after traumatic brain injury (TBI). Memory, in particular, is often disrupted during chronic post-injury recovery. To understand the sex-specific effects of brain injury on retrograde and anterograde memory, we examined paired associate learning (PAL), spatial learning and memory, and fear memory after lateral fluid percussion TBI. We hypothesized that male and female mice would display unique memory deficits after TBI. PAL task acquisition was initiated via touchscreen operant conditioning 22 weeks before sham injury or TBI. Post-injury PAL testing occurred 7 weeks post-injury. Barnes maze and fear conditioning were completed at 14- and 15-weeks post-injury, respectively. Contrary to our expectations, behavioral outcomes were not primarily influenced by TBI. Instead, sex-specific differences were observed in all tasks which exposed task-specific trends in male TBI mice. Male mice took longer to complete the PAL task, but this was not affected by TBI and did not compromise the ability to make a correct choice. Latency to reach the goal box decreased across testing days in Barnes maze, but male TBI mice lagged in improvement compared to all other groups. Use of two learning indices revealed that male TBI mice were deficient in transferring information from 1 day to the next. Finally, acquisition and contextual retention of fear memory were similar between all groups. Cued retention of the tone-shock pairing was influenced by both injury and sex. Male sham mice displayed the strongest cued retention of fear memory, evidenced by increased freezing behavior across the test trial. In contrast, male TBI mice displayed reduced freezing behavior with repetitive tone exposure. An inverse relationship in freezing behavior to tone exposure was detected between female sham and TBI mice, although the difference was not as striking. Together, these studies show that retrograde memory is intact after lateral TBI. However, male mice are more vulnerable to post-injury anterograde memory deficits. These behaviors were not associated with gross pathological change near the site injury or in subcortical brain regions associated with memory formation. Future studies that incorporate pre- and post-injury behavioral analysis will be integral in defining sex-specific memory impairment after TBI.
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Affiliation(s)
- Julie Fitzgerald
- Department of Neuroscience, College of Medicine, The Ohio State University, Columbus, OH, United States
| | - Samuel Houle
- Department of Neuroscience, College of Medicine, The Ohio State University, Columbus, OH, United States
- Institute for Behavioral Medicine Research, Neurological Institute, The Ohio State University, Columbus, OH, United States
| | - Christopher Cotter
- Department of Neuroscience, College of Medicine, The Ohio State University, Columbus, OH, United States
- Institute for Behavioral Medicine Research, Neurological Institute, The Ohio State University, Columbus, OH, United States
| | - Zachary Zimomra
- Department of Neuroscience, College of Medicine, The Ohio State University, Columbus, OH, United States
- Institute for Behavioral Medicine Research, Neurological Institute, The Ohio State University, Columbus, OH, United States
| | - Kris M. Martens
- Department of Neuroscience, College of Medicine, The Ohio State University, Columbus, OH, United States
| | - Cole Vonder Haar
- Department of Neuroscience, College of Medicine, The Ohio State University, Columbus, OH, United States
| | - Olga N. Kokiko-Cochran
- Department of Neuroscience, College of Medicine, The Ohio State University, Columbus, OH, United States
- Institute for Behavioral Medicine Research, Neurological Institute, The Ohio State University, Columbus, OH, United States
- *Correspondence: Olga N. Kokiko-Cochran,
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Faillot M, Chaillet A, Palfi S, Senova S. Rodent models used in preclinical studies of deep brain stimulation to rescue memory deficits. Neurosci Biobehav Rev 2021; 130:410-432. [PMID: 34437937 DOI: 10.1016/j.neubiorev.2021.08.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 08/10/2021] [Accepted: 08/13/2021] [Indexed: 11/28/2022]
Abstract
Deep brain stimulation paradigms might be used to treat memory disorders in patients with stroke or traumatic brain injury. However, proof of concept studies in animal models are needed before clinical translation. We propose here a comprehensive review of rodent models for Traumatic Brain Injury and Stroke. We systematically review the histological, behavioral and electrophysiological features of each model and identify those that are the most relevant for translational research.
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Affiliation(s)
- Matthieu Faillot
- Neurosurgery department, Henri Mondor University Hospital, APHP, DMU CARE, Université Paris Est Créteil, Mondor Institute for Biomedical Research, INSERM U955, Team 15, Translational Neuropsychiatry, France
| | - Antoine Chaillet
- Laboratoire des Signaux et Systèmes (L2S-UMR8506) - CentraleSupélec, Université Paris Saclay, Institut Universitaire de France, France
| | - Stéphane Palfi
- Neurosurgery department, Henri Mondor University Hospital, APHP, DMU CARE, Université Paris Est Créteil, Mondor Institute for Biomedical Research, INSERM U955, Team 15, Translational Neuropsychiatry, France
| | - Suhan Senova
- Neurosurgery department, Henri Mondor University Hospital, APHP, DMU CARE, Université Paris Est Créteil, Mondor Institute for Biomedical Research, INSERM U955, Team 15, Translational Neuropsychiatry, France.
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Shaughness M, Acs D, Brabazon F, Hockenbury N, Byrnes KR. Role of Insulin in Neurotrauma and Neurodegeneration: A Review. Front Neurosci 2020; 14:547175. [PMID: 33100956 PMCID: PMC7546823 DOI: 10.3389/fnins.2020.547175] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 08/13/2020] [Indexed: 12/15/2022] Open
Abstract
Insulin is a hormone typically associated with pancreatic release and blood sugar regulation. The brain was long thought to be “insulin-independent,” but research has shown that insulin receptors (IR) are expressed on neurons, microglia and astrocytes, among other cells. The effects of insulin on cells within the central nervous system are varied, and can include both metabolic and non-metabolic functions. Emerging data suggests that insulin can improve neuronal survival or recovery after trauma or during neurodegenerative diseases. Further, data suggests a strong anti-inflammatory component of insulin, which may also play a role in both neurotrauma and neurodegeneration. As a result, administration of exogenous insulin, either via systemic or intranasal routes, is an increasing area of focus in research in neurotrauma and neurodegenerative disorders. This review will explore the literature to date on the role of insulin in neurotrauma and neurodegeneration, with a focus on traumatic brain injury (TBI), spinal cord injury (SCI), Alzheimer’s disease (AD) and Parkinson’s disease (PD).
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Affiliation(s)
- Michael Shaughness
- Neuroscience Program, Uniformed Services University of the Health Sciences, Bethesda, MD, United States
| | - Deanna Acs
- Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences, Bethesda, MD, United States
| | - Fiona Brabazon
- Neuroscience Program, Uniformed Services University of the Health Sciences, Bethesda, MD, United States
| | - Nicole Hockenbury
- Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences, Bethesda, MD, United States
| | - Kimberly R Byrnes
- Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences, Bethesda, MD, United States
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Nikitin V, Solntseva S, Kozyrev S, Nikitin P. Long-term memory consolidation or reconsolidation impairment induces amnesia with key characteristics that are similar to key learning characteristics. Neurosci Biobehav Rev 2020; 108:542-558. [DOI: 10.1016/j.neubiorev.2019.12.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 09/16/2019] [Accepted: 12/03/2019] [Indexed: 02/07/2023]
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Paterno R, Folweiler KA, Cohen AS. Pathophysiology and Treatment of Memory Dysfunction After Traumatic Brain Injury. Curr Neurol Neurosci Rep 2017; 17:52. [PMID: 28500417 PMCID: PMC5861722 DOI: 10.1007/s11910-017-0762-x] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Memory is fundamental to everyday life, and cognitive impairments resulting from traumatic brain injury (TBI) have devastating effects on TBI survivors. A contributing component to memory impairments caused by TBI is alteration in the neural circuits associated with memory function. In this review, we aim to bring together experimental findings that characterize behavioral memory deficits and the underlying pathophysiology of memory-involved circuits after TBI. While there is little doubt that TBI causes memory and cognitive dysfunction, it is difficult to conclude which memory phase, i.e., encoding, maintenance, or retrieval, is specifically altered by TBI. This is most likely due to variation in behavioral protocols and experimental models. Additionally, we review a selection of experimental treatments that hold translational potential to mitigate memory dysfunction following injury.
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Affiliation(s)
- Rosalia Paterno
- Center for Sleep and Circadian Neurobiology, Perelman School of Medicine, University of Pennsylvania, 3615 Civic Center Boulevard, Abramson Research Center, Rm. 816-h, Philadelphia, PA, 19104, USA.
| | - Kaitlin A Folweiler
- Department of Anesthesiology and Critical Care Medicine, Joseph Stokes, Jr. Research Institute, Children's Hospital of Philadelphia, 3615 Civic Center Boulevard, Abramson Research Center, Rm. 816-h, Philadelphia, PA, 19104, USA
| | - Akiva S Cohen
- Department of Anesthesiology and Critical Care Medicine, Joseph Stokes, Jr. Research Institute, Children's Hospital of Philadelphia, 3615 Civic Center Boulevard, Abramson Research Center, Rm. 816-h, Philadelphia, PA, 19104, USA
- Department of Anesthesiology and Critical Care Medicine, Perelman School of Medicine, University of Pennsylvania, 3615 Civic Center Boulevard, Abramson Research Center, Rm. 816-h, Philadelphia, PA, 19104, USA
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Muccigrosso MM, Ford J, Benner B, Moussa D, Burnsides C, Fenn AM, Popovich PG, Lifshitz J, Walker FR, Eiferman DS, Godbout JP. Cognitive deficits develop 1month after diffuse brain injury and are exaggerated by microglia-associated reactivity to peripheral immune challenge. Brain Behav Immun 2016; 54:95-109. [PMID: 26774527 PMCID: PMC4828283 DOI: 10.1016/j.bbi.2016.01.009] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 01/05/2016] [Accepted: 01/12/2016] [Indexed: 01/07/2023] Open
Abstract
UNLABELLED Traumatic brain injury (TBI) elicits immediate neuroinflammatory events that contribute to acute cognitive, motor, and affective disturbance. Despite resolution of these acute complications, significant neuropsychiatric and cognitive issues can develop and progress after TBI. We and others have provided novel evidence that these complications are potentiated by repeated injuries, immune challenges and stressors. A key component to this may be increased sensitization or priming of glia after TBI. Therefore, our objectives were to determine the degree to which cognitive deterioration occurred after diffuse TBI (moderate midline fluid percussion injury) and ascertain if glial reactivity induced by an acute immune challenge potentiated cognitive decline 30 days post injury (dpi). In post-recovery assessments, hippocampal-dependent learning and memory recall were normal 7 dpi, but anterograde learning was impaired by 30 dpi. Examination of mRNA and morphological profiles of glia 30 dpi indicated a low but persistent level of inflammation with elevated expression of GFAP and IL-1β in astrocytes and MHCII and IL-1β in microglia. Moreover, an acute immune challenge 30 dpi robustly interrupted memory consolidation specifically in TBI mice. These deficits were associated with exaggerated microglia-mediated inflammation with amplified (IL-1β, CCL2, TNFα) and prolonged (TNFα) cytokine/chemokine expression, and a marked reactive morphological profile of microglia in the CA3 of the hippocampus. Collectively, these data indicate that microglia remain sensitized 30 dpi after moderate TBI and a secondary inflammatory challenge elicits robust microglial reactivity that augments cognitive decline. STATEMENT OF SIGNIFICANCE Traumatic brain injury (TBI) is a major risk factor in development of neuropsychiatric problems long after injury, negatively affecting quality of life. Mounting evidence indicates that inflammatory processes worsen with time after a brain injury and are likely mediated by glia. Here, we show that primed microglia and astrocytes developed in mice 1 month following moderate diffuse TBI, coinciding with cognitive deficits that were not initially evident after injury. Additionally, TBI-induced glial priming may adversely affect the ability of glia to appropriately respond to immune challenges, which occur regularly across the lifespan. Indeed, we show that an acute immune challenge augmented microglial reactivity and cognitive deficits. This idea may provide new avenues of clinical assessments and treatments following TBI.
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Affiliation(s)
- Megan M. Muccigrosso
- Department of Neuroscience, The Ohio State University, 333 W. 10th Ave, Columbus, OH
| | - Joni Ford
- Department of Neuroscience, The Ohio State University, 333 W. 10th Ave, Columbus, OH
| | - Brooke Benner
- Department of Neuroscience, The Ohio State University, 333 W. 10th Ave, Columbus, OH
| | - Daniel Moussa
- Department of Neuroscience, The Ohio State University, 333 W. 10th Ave, Columbus, OH
| | - Christopher Burnsides
- Department of Neuroscience, The Ohio State University, 333 W. 10th Ave, Columbus, OH
| | - Ashley M. Fenn
- Department of Neuroscience, The Ohio State University, 333 W. 10th Ave, Columbus, OH
| | - Phillip G. Popovich
- Department of Neuroscience, The Ohio State University, 333 W. 10th Ave, Columbus, OH,Center for Brain and Spinal Cord Repair, The Ohio State University, 460 W. 12th Ave, Columbus, OH,Institute for Behavioral Medicine Research, The Ohio State University, 460 Medical Center Dr., Columbus, OH
| | - Jonathan Lifshitz
- Barrow Neurological Institute at Phoenix Children’s Hospital, Department of Child Health, University of Arizona, College of Medicine-Phoenix, Phoenix, AZ
| | - Fredrick Rohan Walker
- School of Biomedical Sciences and Pharmacy, University of Newcastle, Callaghan 2308, South Wales, Australia
| | - Daniel S. Eiferman
- Department of Surgery, The Ohio State University, 395 W. 12th Avenue, Columbus, OH
| | - Jonathan P. Godbout
- Department of Neuroscience, The Ohio State University, 333 W. 10th Ave, Columbus, OH,Center for Brain and Spinal Cord Repair, The Ohio State University, 460 W. 12th Ave, Columbus, OH,Institute for Behavioral Medicine Research, The Ohio State University, 460 Medical Center Dr., Columbus, OH,To whom correspondence should be addressed: J.P. Godbout, 259 IBMR Bldg., 460 Medical Center Dr., The Ohio State University, Columbus, OH 43210, USA. Tel: (614) 293-3456 Fax: (614) 366-2097,
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Assessment of Cognitive Function in the Water Maze Task: Maximizing Data Collection and Analysis in Animal Models of Brain Injury. Methods Mol Biol 2016; 1462:553-71. [PMID: 27604738 DOI: 10.1007/978-1-4939-3816-2_30] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Animal models play a critical role in understanding the biomechanical, pathophysiological, and behavioral consequences of traumatic brain injury (TBI). In preclinical studies, cognitive impairment induced by TBI is often assessed using the Morris water maze (MWM). Frequently described as a hippocampally dependent spatial navigation task, the MWM is a highly integrative behavioral task that requires intact functioning in numerous brain regions and involves an interdependent set of mnemonic and non-mnemonic processes. In this chapter, we review the special considerations involved in using the MWM in animal models of TBI, with an emphasis on maximizing the degree of information extracted from performance data. We include a theoretical framework for examining deficits in discrete stages of cognitive function and offer suggestions for how to make inferences regarding the specific nature of TBI-induced cognitive impairment. The ultimate goal is more precise modeling of the animal equivalents of the cognitive deficits seen in human TBI.
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Structural white matter differences underlying heterogeneous learning abilities after TBI. Brain Imaging Behav 2015; 10:1274-1279. [DOI: 10.1007/s11682-015-9497-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Almeida-Suhett CP, Prager EM, Pidoplichko V, Figueiredo TH, Marini AM, Li Z, Eiden LE, Braga MF. GABAergic interneuronal loss and reduced inhibitory synaptic transmission in the hippocampal CA1 region after mild traumatic brain injury. Exp Neurol 2015; 273:11-23. [DOI: 10.1016/j.expneurol.2015.07.028] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 07/24/2015] [Accepted: 07/30/2015] [Indexed: 01/07/2023]
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13
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Chiou KS, Sandry J, Chiaravalloti ND. Cognitive contributions to differences in learning after moderate to severe traumatic brain injury. J Clin Exp Neuropsychol 2015; 37:1074-85. [DOI: 10.1080/13803395.2015.1078293] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Luoto TM, Iverson GL, Losoi H, Wäljas M, Tenovuo O, Kataja A, Brander A, Öhman J. Clinical correlates of retrograde amnesia in mild traumatic brain injury. Brain Inj 2015; 29:565-72. [DOI: 10.3109/02699052.2014.1002421] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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15
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Sebastian V, Diallo A, Ling DSF, Serrano PA. Robust training attenuates TBI-induced deficits in reference and working memory on the radial 8-arm maze. Front Behav Neurosci 2013; 7:38. [PMID: 23653600 PMCID: PMC3642509 DOI: 10.3389/fnbeh.2013.00038] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Accepted: 04/18/2013] [Indexed: 11/13/2022] Open
Abstract
Globally, it is estimated that nearly 10 million people sustain severe brain injuries leading to hospitalization and/or death every year. Amongst survivors, traumatic brain injury (TBI) results in a wide variety of physical, emotional and cognitive deficits. The most common cognitive deficit associated with TBI is memory loss, involving impairments in spatial reference and working memory. However, the majority of research thus far has characterized the deficits associated with TBI on either reference or working memory systems separately, without investigating how they interact within a single task. Thus, we examined the effects of TBI on short-term working and long-term reference memory using the radial 8-arm maze (RAM) with a sequence of four baited and four unbaited arms. Subjects were given 10 daily trials for 6 days followed by a memory retrieval test 2 weeks after training. Multiple training trials not only provide robust training, but also test the subjects' ability to frequently update short-term memory while learning the reference rules of the task. Our results show that TBI significantly impaired short-term working memory function on previously acquired spatial information but has little effect on long-term reference memory. Additionally, TBI significantly increased working memory errors during acquisition and reference memory errors during retention testing 2 weeks later. With a longer recovery period after TBI, the robust RAM training mitigated the reference memory deficit in retention but not the short-term working memory deficit during acquisition. These results identify the resiliency and vulnerabilities of short-term working and long-term reference memory to TBI in the context of robust training. The data highlight the role of cognitive training and other behavioral remediation strategies implicated in attenuating deficits associated with TBI.
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Affiliation(s)
| | | | - Douglas S. F. Ling
- Department of Physiology and Pharmacology, SUNY Downstate Medical CenterBrooklyn, NY, USA
- The Robert F. Furchgott Center for Neural and Behavioral Science, SUNY Downstate Medical CenterBrooklyn, NY, USA
| | - Peter A. Serrano
- Department of Psychology, Hunter CollegeNew York, NY, USA
- Department of Psychology, The Graduate Center of CUNYNew York, NY, USA
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DeWitt DS, Perez-Polo R, Hulsebosch CE, Dash PK, Robertson CS. Challenges in the Development of Rodent Models of Mild Traumatic Brain Injury. J Neurotrauma 2013; 30:688-701. [DOI: 10.1089/neu.2012.2349] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- Douglas S. DeWitt
- Department of Anesthesiology, The University of Texas Medical Branch, Galveston, Texas
| | - Regino Perez-Polo
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas
| | - Claire E. Hulsebosch
- Department of Neuroscience and Cell Biology, The University of Texas Medical Branch, Galveston, Texas
| | - Pramod K. Dash
- Department of Neuroscience, The University of Texas Health Science Center, Houston, Texas
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