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Chen Z, Ford K, Islam M, Iamsawat S, Davis B, Weiss C, Schwulst S. ANTI-CD49D ANTIBODY TREATMENT IMPROVES SURVIVAL AND ATTENUATES NEUROCOGNITIVE DEFICITS AFTER TRAUMATIC BRAIN INJURY IN AGED MICE. Shock 2024; 61:112-119. [PMID: 38010092 PMCID: PMC10841910 DOI: 10.1097/shk.0000000000002256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
ABSTRACT Patients 65 years and older account for an increasing proportion of traumatic brain injury (TBI) patients. Aged TBI patients experience increased morbidity and mortality compared with young TBI patients. We previously demonstrated a marked accumulation of CD8 + T-cells within the brains of aged TBI mice compared with young TBI mice. Therefore, we hypothesized that blocking peripheral T-cell infiltration into the injured brain would improve neurocognitive outcomes in aged mice after TBI. Young and aged male C57BL/6 mice underwent TBI via controlled cortical impact versus sham injury. Two hours after injuries, mice received an anti-CD49d antibody (aCD49d Ab) to block peripheral lymphocyte infiltration or its isotype control. Dosing was repeated every 2 weeks. Mortality was tracked. Neurocognitive testing for anxiety, associative learning, and memory was assessed. Motor function was evaluated. Plasma was collected for cytokine analysis. Flow cytometry was used to phenotype different immune cells within the brains. Consequently, aCD49d Ab treatment significantly improved post-TBI survival, anxiety level, associative learning, memory, and motor function in aged mice 2 months after TBI compared with isotype control treated mice. aCD49d Ab treatment augmented T H 2 response in the plasma of aged mice 2 months after TBI compared with isotype control-treated mice. Notably, aCD49d Ab treatment significantly reduced activated CD8 + cytotoxic T-cells within aged mouse brains after TBI. Contrastingly, no difference was detected in young mice after aCD49d Ab treatment. Collectively, aCD49 Ab treatment reduced T-cells in the injured brain, improved survival, and attenuated neurocognitive and gait deficits. Hence, aCD49d Ab may be a promising therapeutic intervention in aged TBI subjects-a population often excluded in TBI clinical trials.
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Affiliation(s)
- Zhangying Chen
- Department of Surgery, Division of Trauma and Critical
Care, Northwestern University Feinberg School of Medicine, Chicago IL, USA
- Driskill Graduate Program in Life Sciences, Northwestern
University Feinberg School of Medicine, Chicago IL, USA
| | - Kacie Ford
- Department of Surgery, Division of Trauma and Critical
Care, Northwestern University Feinberg School of Medicine, Chicago IL, USA
| | - Mecca Islam
- Department of Surgery, Division of Trauma and Critical
Care, Northwestern University Feinberg School of Medicine, Chicago IL, USA
| | - Supinya Iamsawat
- Department of Microbiology and Immunology, Northwestern
University Feinberg School of Medicine, Chicago, IL
| | - Booker Davis
- Department of Surgery, Division of Trauma and Critical
Care, Northwestern University Feinberg School of Medicine, Chicago IL, USA
| | - Craig Weiss
- Department of Neuroscience, Feinberg School of Medicine,
Northwestern University, Chicago, Illinois, USA
| | - Steven Schwulst
- Department of Surgery, Division of Trauma and Critical
Care, Northwestern University Feinberg School of Medicine, Chicago IL, USA
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2
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Dams-O'Connor K, Seifert AC, Crary JF, Delman BN, Del Bigio MR, Kovacs GG, Lee EB, Nolan AL, Pruyser A, Selmanovic E, Stewart W, Woodoff-Leith E, Folkerth RD. The neuropathology of intimate partner violence. Acta Neuropathol 2023; 146:803-815. [PMID: 37897548 PMCID: PMC10627910 DOI: 10.1007/s00401-023-02646-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 10/14/2023] [Accepted: 10/14/2023] [Indexed: 10/30/2023]
Abstract
Lifelong brain health consequences of traumatic brain injury (TBI) include the risk of neurodegenerative disease. Up to one-third of women experience intimate partner violence (IPV) in their lifetime, often with TBI, yet remarkably little is known about the range of autopsy neuropathologies encountered in IPV. We report a prospectively accrued case series from a single institution, the New York City Office of Chief Medical Examiner, evaluated in partnership with the Brain Injury Research Center of Mount Sinai, using a multimodal protocol comprising clinical history review, ex vivo imaging in a small subset, and comprehensive neuropathological assessment by established consensus protocols. Fourteen brains were obtained over 2 years from women with documented IPV (aged 3rd-8th decade; median, 4th) and complex histories including prior TBI in 6, nonfatal strangulation in 4, cerebrovascular, neurological, and/or psychiatric conditions in 13, and epilepsy in 7. At autopsy, all had TBI stigmata (old and/or recent). In addition, white matter regions vulnerable to diffuse axonal injury showed perivascular and parenchymal iron deposition and microgliosis in some subjects. Six cases had evidence of cerebrovascular disease (lacunes and/or chronic infarcts). Regarding neurodegenerative disease pathologies, Alzheimer disease neuropathologic change was present in a single case (8th decade), with no chronic traumatic encephalopathy neuropathologic change (CTE-NC) identified in any. Findings from this initial series then prompted similar exploration in an expanded case series of 70 archival IPV cases (aged 2nd-9th decade; median, 4th) accrued from multiple international institutions. In this secondary case series, we again found evidence of vascular and white matter pathologies. However, only limited neurodegenerative proteinopathies were encountered in the oldest subjects, none meeting consensus criteria for CTE-NC. These observations from this descriptive exploratory study reinforce a need to consider broad co-morbid and neuropathological substrates contributing to brain health outcomes in the context of IPV, some of which may be potentially modifiable.
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Affiliation(s)
- Kristen Dams-O'Connor
- Department of Rehabilitation and Human Performance, Brain Injury Research Center of Mount Sinai, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Alan C Seifert
- Department of Diagnostic, Molecular and Interventional Radiology, Biomedical Engineering and Imaging Institute, Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York City, NY, USA
| | - John F Crary
- Department of Pathology, Molecular, and Cell Based Medicine, Ronald M. Loeb Center for Alzheimer's Disease, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Nash Family Department of Neuroscience, and Artificial Intelligence & Human Health, Ronald M. Loeb Center for Alzheimer's Disease, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Neuropathology Brain Bank & Research CoRE, Mount Sinai Hospital, New York, NY, USA
| | - Bradley N Delman
- Department of Diagnostic, Molecular and Interventional Radiology, Biomedical Engineering and Imaging Institute, Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York City, NY, USA
| | - Marc R Del Bigio
- Department of Pathology, Rady Faculty of Health Sciences, University of Manitoba, Room 401 Brodie Centre, 727 McDermot Avenue, Winnipeg, MB, Canada
- Diagnostic Services - Pathology, Shared Health Manitoba, Winnipeg, MB, Canada
| | - Gabor G Kovacs
- Tanz Centre for Research in Neurodegenerative Disease (CRND) and Department of Laboratory Medicine and Pathobiology, Krembil Discovery Tower, University of Toronto, 60 Leonard Ave, Toronto, ON, Canada
- Laboratory Medicine Program and Krembil Brain Institute, University Health Network, Toronto, ON, Canada
| | - Edward B Lee
- Translational Neuropathology Research Laboratory, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Amber L Nolan
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - Ariel Pruyser
- Department of Rehabilitation and Human Performance, Brain Injury Research Center of Mount Sinai, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Enna Selmanovic
- Department of Rehabilitation and Human Performance, Brain Injury Research Center of Mount Sinai, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - William Stewart
- Department of Neuropathology, Elizabeth University Hospital, Glasgow, G514TF, Queen, UK
- School of Psychology and Neuroscience, University of Glasgow, Glasgow, G128QQ, UK
| | - Emma Woodoff-Leith
- Department of Pathology, Molecular, and Cell Based Medicine, Ronald M. Loeb Center for Alzheimer's Disease, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Nash Family Department of Neuroscience, and Artificial Intelligence & Human Health, Ronald M. Loeb Center for Alzheimer's Disease, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Neuropathology Brain Bank & Research CoRE, Mount Sinai Hospital, New York, NY, USA
| | - Rebecca D Folkerth
- Office of Chief Medical Examiner, 520 First Avenue, New York, NY, 10116, USA.
- Department of Forensic Medicine, New York University Grossman School of Medicine, New York, NY, USA.
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3
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Pearson A, Ortiz C, Eisenbaum M, Arrate C, Browning M, Mullan M, Bachmeier C, Crawford F, Ojo JO. Deletion of PTEN in microglia ameliorates chronic neuroinflammation following repetitive mTBI. Mol Cell Neurosci 2023; 125:103855. [PMID: 37084991 DOI: 10.1016/j.mcn.2023.103855] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 03/25/2023] [Accepted: 04/17/2023] [Indexed: 04/23/2023] Open
Abstract
Traumatic brain injury is a leading cause of morbidity and mortality in adults and children in developed nations. Following the primary injury, microglia, the resident innate immune cells of the CNS, initiate several inflammatory signaling cascades and pathophysiological responses that may persist chronically; chronic neuroinflammation following TBI has been closely linked to the development of neurodegeneration and neurological dysfunction. Phosphoinositide 3-kinases (PI3Ks) are a family of lipid kinases that have been shown to regulate several key mechanisms in the inflammatory response to TBI. Increasing evidence has shown that the modulation of the PI3K/AKT signaling pathway has the potential to influence the cellular response to inflammatory stimuli. However, directly targeting PI3K signaling poses several challenges due to its regulatory role in several cell survival pathways. We have previously identified that the phosphatase and tensin homolog deleted on chromosome 10 (PTEN), the major negative regulator of PI3K/AKT signaling, is dysregulated following exposure to repetitive mild traumatic brain injury (r-mTBI). Moreover, this dysregulated PI3K/AKT signaling was correlated with chronic microglial-mediated neuroinflammation. Therefore, we interrogated microglial-specific PTEN as a therapeutic target in TBI by generating a microglial-specific, Tamoxifen inducible conditional PTEN knockout model using a CX3CR1 Cre recombinase mouse line PTENfl/fl/CX3CR1+/CreERT2 (mcg-PTENcKO), and exposed them to our 20-hit r-mTBI paradigm. Animals were treated with tamoxifen at 76 days post-last injury, and the effects of microglia PTEN deletion on immune-inflammatory responses were assessed at 90-days post last injury. We observed that the deletion of microglial PTEN ameliorated the proinflammatory response to repetitive brain trauma, not only reducing chronic microglial activation and proinflammatory cytokine production but also rescuing TBI-induced reactive astrogliosis, demonstrating that these effects extended beyond microglia alone. Additionally, we observed that the pharmacological inhibition of PTEN with BpV(HOpic) ameliorated the LPS-induced activation of microglial NFκB signaling in vitro. Together, these data provide support for the role of PTEN as a regulator of chronic neuroinflammation following repetitive mild TBI.
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Affiliation(s)
- Andrew Pearson
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom.
| | - Camila Ortiz
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom
| | - Max Eisenbaum
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom
| | - Clara Arrate
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA
| | | | - Michael Mullan
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom
| | - Corbin Bachmeier
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom
| | - Fiona Crawford
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom; James A. Haley Veterans' Hospital, 13000 Bruce B Downs Blvd, Tampa, FL 33612, USA
| | - Joseph O Ojo
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom
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4
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Yadikar H, Johnson C, Pafundi N, Nguyen L, Kurup M, Torres I, Al-Enezy A, Yang Z, Yost R, Kobeissy FH, Wang KKW. Neurobiochemical, Peptidomic, and Bioinformatic Approaches to Characterize Tauopathy Peptidome Biomarker Candidates in Experimental Mouse Model of Traumatic Brain Injury. Mol Neurobiol 2023; 60:2295-2319. [PMID: 36635478 DOI: 10.1007/s12035-022-03165-y] [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: 03/21/2022] [Accepted: 12/10/2022] [Indexed: 01/14/2023]
Abstract
Traumatic brain injury (TBI) is a multidimensional damage, and currently, no FDA-approved medicine is available. Multiple pathways in the cell are triggered through a head injury (e.g., calpain and caspase activation), which truncate tau and generate variable fragment sizes (MW 400-45,000 K). In this study, we used an open-head TBI mouse model generated by controlled cortical impact (CCI) and collected ipsilateral (IC) and contralateral (CC) mice htau brain cortices at one (D1) three (D3), and seven (D7) days post-injury. We implemented immunological (antibody-based detection) and peptidomic approaches (nano-reversed-phase liquid chromatography/tandem mass spectrometry) to investigate proteolytic tau peptidome (low molecular weight (LMW) < 10 K)) and pathological phosphorylation sites (high-molecular-weight (HMW); > 10 K) derived from CCI-TBI animal models. Our immunoblotting analysis verified tau hyperphosphorylation, HMW, and HMW breakdown products (HMW-BDP) formation of tau (e.g., pSer202, pThr181, pThr231, pSer396, and pSer404), following CCI-TBI. Peptidomic data revealed unique sequences of injury-dependent proteolytic peptides generated from human tau protein. Among the N-terminal tau peptides, EIPEGTTAEEAGIGDTPSLEDEAAGHVTQA (a.a. 96-125) and AQPHTEIPEGTTAEEAGIGDTPSLEDEAAGHVTQARM (a.a. 91-127). Examples of tau C-terminal peptides identified include NVSSTGSIDMVDSPQLATLADEVSASLAKQGL (a.a. 410-441) and QLATLADEVSASLAKQGL (a.a. 424-441). Our peptidomic bioinformatic tools showed the association of proteases, such as CAPN1, CAPN2, and CTSL; CASP1, MMP7, and MMP9; and ELANE, GZMA, and MEP1A, in CCI-TBI tau peptidome. In clinical trials for novel TBI treatments, it might be useful to monitor a subset of tau peptidome as targets for biomarker utility and use them for a "theranostic" approach.
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Affiliation(s)
- Hamad Yadikar
- Department of Biological Sciences, Faculty of Science, Kuwait University, Kuwait, Kuwait.
| | - Connor Johnson
- Department of Biological Sciences, Faculty of Science, Kuwait University, Kuwait, Kuwait
| | - Niko Pafundi
- Department of Biological Sciences, Faculty of Science, Kuwait University, Kuwait, Kuwait
| | - Lynn Nguyen
- Department of Biological Sciences, Faculty of Science, Kuwait University, Kuwait, Kuwait
| | - Milin Kurup
- Department of Biological Sciences, Faculty of Science, Kuwait University, Kuwait, Kuwait
| | - Isabel Torres
- Department of Biological Sciences, Faculty of Science, Kuwait University, Kuwait, Kuwait
| | - Albandery Al-Enezy
- Department of Biological Sciences, Faculty of Science, Kuwait University, Kuwait, Kuwait
| | - Zhihui Yang
- Department of Biological Sciences, Faculty of Science, Kuwait University, Kuwait, Kuwait
| | - Richard Yost
- Department of Chemistry, Chemistry Laboratory Building, University of Florida, Gainesville, FL, 32611, USA
| | - Firas H Kobeissy
- Program for Neurotrauma, Neuroproteomics & Biomarkers Research, Departments of Emergency Medicine, Psychiatry, Neuroscience and Chemistry, University of Florida, Gainesville, FL, USA. .,Department of Biochemistry and Molecular Genetics, American University of Beirut, Beirut, Lebanon. .,Morehouse School of Medicine, Department of Neurobiology, Center for Neurotrauma, Multiomics & Biomarkers (CNMB), 720 Westview Dr. SW, Atlanta, GA, 30310, USA.
| | - Kevin K W Wang
- Program for Neurotrauma, Neuroproteomics & Biomarkers Research, Departments of Emergency Medicine, Psychiatry, Neuroscience and Chemistry, University of Florida, Gainesville, FL, USA. .,Morehouse School of Medicine, Department of Neurobiology, Center for Neurotrauma, Multiomics & Biomarkers (CNMB), 720 Westview Dr. SW, Atlanta, GA, 30310, USA. .,Brain Rehabilitation Research Center, Malcom Randall VA Medical Center, Gainesville, FL, 32608, USA.
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5
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Morita Y, Kamagata K, Andica C, Takabayashi K, Kikuta J, Fujita S, Samoyeau T, Uchida W, Saito Y, Tabata H, Naito H, Someya Y, Kaga H, Tamura Y, Miyata M, Akashi T, Wada A, Taoka T, Naganawa S, Watada H, Kawamori R, Abe O, Aoki S. Glymphatic system impairment in nonathlete older male adults who played contact sports in their youth associated with cognitive decline: A diffusion tensor image analysis along the perivascular space study. Front Neurol 2023; 14:1100736. [PMID: 36873446 PMCID: PMC9977161 DOI: 10.3389/fneur.2023.1100736] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 01/09/2023] [Indexed: 02/17/2023] Open
Abstract
Background and purpose Exposure to contact sports in youth causes brain health problems later in life. For instance, the repetitive head impacts in contact sports might contribute to glymphatic clearance impairment and cognitive decline. This study aimed to assess the effect of contact sports participation in youth on glymphatic function in old age and the relationship between glymphatic function and cognitive status using the analysis along the perivascular space (ALPS) index. Materials and methods A total of 52 Japanese older male subjects were included in the study, including 12 who played heavy-contact sports (mean age, 71.2 years), 15 who played semicontact sports (mean age, 73.1 years), and 25 who played noncontact sports (mean age, 71.3 years) in their youth. All brain diffusion-weighted images (DWIs) of the subjects were acquired using a 3T MRI scanner. The ALPS indices were calculated using a validated semiautomated pipeline. The ALPS indices from the left and right hemispheres were compared between groups using a general linear model, including age and years of education. Furthermore, partial Spearman's rank correlation tests were performed to assess the correlation between the ALPS indices and cognitive scores (Mini-Mental State Examination and the Japanese version of the Montreal Cognitive Assessment [MoCA-J]) after adjusting for age years of education and HbA1c. Results The left ALPS index was significantly lower in the heavy-contact and semicontact groups than that in the noncontact group. Although no significant differences were observed in the left ALPS index between the heavy-contact and semicontact groups and in the right ALPS index among groups, a trend toward lower was found in the right ALPS index in individuals with semicontact and heavy-contact compared to the noncontact group. Both sides' ALPS indices were significantly positively correlated with the MoCA-J scores. Conclusion The findings indicated the potential adverse effect of contact sports experience in youth on the glymphatic system function in old age associated with cognitive decline.
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Affiliation(s)
- Yuichi Morita
- Department of Radiology, Graduate School of Medicine, Juntendo University, Tokyo, Japan.,Department of Radiology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Koji Kamagata
- Department of Radiology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Christina Andica
- Department of Radiology, Graduate School of Medicine, Juntendo University, Tokyo, Japan.,Faculty of Health Data Science, Juntendo University, Chiba, Japan
| | - Kaito Takabayashi
- Department of Radiology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Junko Kikuta
- Department of Radiology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Shohei Fujita
- Department of Radiology, Graduate School of Medicine, Juntendo University, Tokyo, Japan.,Department of Radiology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Thomas Samoyeau
- Department of Radiology, Necker Hospital, Paris University, Paris, France
| | - Wataru Uchida
- Department of Radiology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Yuya Saito
- Department of Radiology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Hiroki Tabata
- Sportology Center, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Hitoshi Naito
- Department of Metabolism and Endocrinology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Yuki Someya
- Sportology Center, Graduate School of Medicine, Juntendo University, Tokyo, Japan.,Graduate School of Health and Sports Science, Juntendo University, Inzai, Chiba, Japan
| | - Hideyoshi Kaga
- Department of Metabolism and Endocrinology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Yoshifumi Tamura
- Sportology Center, Graduate School of Medicine, Juntendo University, Tokyo, Japan.,Department of Metabolism and Endocrinology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Mari Miyata
- Department of Functional Brain Imaging, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Toshiaki Akashi
- Department of Radiology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Akihiko Wada
- Department of Radiology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Toshiaki Taoka
- Department of Innovative Biomedical Visualization, Graduate School of Medicine, Nagoya University, Nagoya, Japan
| | - Shinji Naganawa
- Department of Radiology, Graduate School of Medicine, Nagoya University, Nagoya, Japan
| | - Hirotaka Watada
- Sportology Center, Graduate School of Medicine, Juntendo University, Tokyo, Japan.,Department of Metabolism and Endocrinology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Ryuzo Kawamori
- Sportology Center, Graduate School of Medicine, Juntendo University, Tokyo, Japan.,Department of Metabolism and Endocrinology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Osamu Abe
- Department of Radiology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Shigeki Aoki
- Department of Radiology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
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6
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Blaya MO, Raval AP, Bramlett HM. Traumatic brain injury in women across lifespan. Neurobiol Dis 2022; 164:105613. [PMID: 34995753 DOI: 10.1016/j.nbd.2022.105613] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 12/16/2021] [Accepted: 01/03/2022] [Indexed: 11/27/2022] Open
Abstract
Traumatic brain injury (TBI) is a leading cause of death and disability and a global public health challenge. Every year more than 50 million people suffer a TBI, and it is estimated that 50% of the global population will experience at least one TBI in their lifetime. TBI affects both men and women of all ages, however there is a male bias in TBI research as women have frequently been left out of the literature despite irrefutable evidence of male and female dimorphism in several posttraumatic measures. Women uniquely experience distinct life stages marked by levels of endogenous circulating sex hormones, as well as by physiological changes that are nonexistent in men. In addition to generalized sex-specific differences, a woman's susceptibility, neurological outcomes, and treatment success may vary considerably depending upon when in her lifespan she incurred a traumatic insult. How women impacted by TBI might differ from other women as a factor of age and physiology is not well understood. Furthermore, there is a gap in the knowledge of what happens when TBI occurs in the presence of certain sex-specific and sex-nonspecific variables, such as during pregnancy, with oral contraceptive use, in athletics, in cases of addiction and nicotine consumption, during perimenopause, postmenopause, in frailty, among others. Parsing out how hormone-dependent and hormone-independent lifespan variables may influence physiological, neurodegenerative, and functional outcomes will greatly contribute to future investigative studies and direct therapeutic strategies. The goal of this review is to aggregate the knowledge of prevalence, prognosis, comorbid risk, and response of women incurring TBI at differing phases of lifespan. We strive to illuminate commonalities and disparities among female populations, and to pose important questions to highlight gaps in the field in order to further the endeavor of targeted treatment interventions in a patient-specific manner.
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Affiliation(s)
- Meghan O Blaya
- Department of Neurological Surgery, University of Miami, Miami, Florida, USA; The Miami Project to Cure Paralysis, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Ami P Raval
- Peritz Scheinberg Cerebral Vascular Disease Research Laboratory, Department of Neurology, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Helen M Bramlett
- Department of Neurological Surgery, University of Miami, Miami, Florida, USA; The Miami Project to Cure Paralysis, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, USA; Bruce W. Carter Department of Veterans Affairs Medical Center, Miami, Florida, USA.
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7
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Inampudi C, Ciccotosto GD, Cappai R, Crack PJ. Genetic Modulators of Traumatic Brain Injury in Animal Models and the Impact of Sex-Dependent Effects. J Neurotrauma 2021; 37:706-723. [PMID: 32027210 DOI: 10.1089/neu.2019.6955] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Traumatic brain injury (TBI) is a major health problem causing disability and death worldwide. There is no effective treatment, due in part to the complexity of the injury pathology and factors affecting its outcome. The extent of brain injury depends on the type of insult, age, sex, lifestyle, genetic risk factors, socioeconomic status, other co-injuries, and underlying health problems. This review discusses the genes that have been directly tested in TBI models, and whether their effects are known to be sex-dependent. Sex differences can affect the incidence, symptom onset, pathology, and clinical outcomes following injury. Adult males are more susceptible at the acute phase and females show greater injury in the chronic phase. TBI is not restricted to a single sex; despite variations in the degree of symptom onset and severity, it is important to consider both female and male animals in TBI pre-clinical research studies.
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Affiliation(s)
- Chaitanya Inampudi
- Department of Pharmacology and Therapeutics, University of Melbourne, Parkville, Victoria, Australia
| | - Giuseppe D Ciccotosto
- Department of Pharmacology and Therapeutics, University of Melbourne, Parkville, Victoria, Australia
| | - Roberto Cappai
- Department of Pharmacology and Therapeutics, University of Melbourne, Parkville, Victoria, Australia
| | - Peter J Crack
- Department of Pharmacology and Therapeutics, University of Melbourne, Parkville, Victoria, Australia
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8
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Smith DH, Kochanek PM, Rosi S, Meyer R, Ferland-Beckham C, Prager EM, Ahlers ST, Crawford F. Roadmap for Advancing Pre-Clinical Science in Traumatic Brain Injury. J Neurotrauma 2021; 38:3204-3221. [PMID: 34210174 PMCID: PMC8820284 DOI: 10.1089/neu.2021.0094] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Pre-clinical models of disease have long played important roles in the advancement of new treatments. However, in traumatic brain injury (TBI), despite the availability of numerous model systems, translation from bench to bedside remains elusive. Integrating clinical relevance into pre-clinical model development is a critical step toward advancing therapies for TBI patients across the spectrum of injury severity. Pre-clinical models include in vivo and ex vivo animal work-both small and large-and in vitro modeling. The wide range of pre-clinical models reflect substantial attempts to replicate multiple aspects of TBI sequelae in humans. Although these models reveal multiple putative mechanisms underlying TBI pathophysiology, failures to translate these findings into successful clinical trials call into question the clinical relevance and applicability of the models. Here, we address the promises and pitfalls of pre-clinical models with the goal of evolving frameworks that will advance translational TBI research across models, injury types, and the heterogenous etiology of pathology.
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Affiliation(s)
- Douglas H Smith
- Center for Brain Injury and Repair, Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Patrick M Kochanek
- Department of Critical Care Medicine; Safar Center for Resuscitation Research, University of Pittsburgh School of Medicine and Children's Hospital of Pittsburgh of UPMC, Rangos Research Center, Pittsburgh, Pennsylvania, USA
| | - Susanna Rosi
- Departments of Physical Therapy Rehabilitation Science, Neurological Surgery, Weill Institute for Neuroscience, University of California San Francisco, Zuckerberg San Francisco General Hospital, San Francisco, California, USA
| | - Retsina Meyer
- Cohen Veterans Bioscience, New York, New York, USA.,Delix Therapeutics, Inc, Boston, Massachusetts, USA
| | | | | | - Stephen T Ahlers
- Department of Neurotrauma, Operational and Undersea Medicine Directorate Naval Medical Research Center, Silver Spring, Maryland, USA
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9
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Tucker LB, Fu AH, McCabe JT. Hippocampal-Dependent Cognitive Dysfunction following Repeated Diffuse Rotational Brain Injury in Male and Female Mice. J Neurotrauma 2021; 38:1585-1606. [PMID: 33622092 PMCID: PMC8126427 DOI: 10.1089/neu.2021.0025] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Cognitive dysfunction is a common, often long-term complaint following acquired traumatic brain injury (TBI). Cognitive deficits suggest dysfunction in hippocampal circuits. The goal of the studies described here is to phenotype in both male and female mice the hippocampal-dependent learning and memory deficits resulting from TBI sustained by the Closed-Head Impact Model of Engineered Rotational Acceleration (CHIMERA) device—a model that delivers both a contact–concussion injury as well as unrestrained rotational head movement. Mice sustained either sham procedures or four injuries (0.7 J, 24-h intervals). Spatial learning and memory skills assessed in the Morris water maze (MWM) approximately 3 weeks following injuries were significantly impaired by brain injuries; however, slower swimming speeds and poor performance on visible platform trials suggest that measurement of cognitive impairment with this test is confounded by injury-induced motor and/or visual impairments. A separate experiment confirmed hippocampal-dependent cognitive deficits with trace fear conditioning (TFC), a behavioral test less dependent on motor and visual function. Male mice had greater injury-induced deficits on both the MWM and TFC tests than female mice. Pathologically, the injury was characterized by white matter damage as observed by silver staining and glial fibrillary acidic protein (astrogliosis) in the optic tracts, with milder damage seen in the corpus callosum, and fimbria and brainstem (cerebral peduncles) of some animals. No changes in the density of GABAergic parvalbumin-expressing cells in the hippocampus, amygdala, or parietal cortex were found. This experiment confirmed significant sexually dimorphic cognitive impairments following a repeated, diffuse brain injury.
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Affiliation(s)
- Laura B Tucker
- Center for Neuroscience and Regenerative Medicine, Physiology and Genetics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA.,Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
| | - Amanda H Fu
- Center for Neuroscience and Regenerative Medicine, Physiology and Genetics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA.,Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
| | - Joseph T McCabe
- Center for Neuroscience and Regenerative Medicine, Physiology and Genetics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA.,Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
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10
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Davidowitz EJ, Krishnamurthy PK, Lopez P, Jimenez H, Adrien L, Davies P, Moe JG. In Vivo Validation of a Small Molecule Inhibitor of Tau Self-Association in htau Mice. J Alzheimers Dis 2021; 73:147-161. [PMID: 31771053 PMCID: PMC6957711 DOI: 10.3233/jad-190465] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Tau oligomers have been shown to transmit tau pathology from diseased neurons to healthy neurons through seeding, tau misfolding, and aggregation that is thought to play an influential role in the progression of Alzheimer's disease (AD) and related tauopathies. To develop a small molecule therapeutic for AD and related tauopathies, we have developed in vitro and cellular assays to select molecules inhibiting the first step in tau aggregation, the self-association of tau into oligomers. In vivo validation studies of an optimized lead compound were independently performed in the htau mouse model of tauopathy that expresses the human isoforms of tau without inherited tauopathy mutations that are irrelevant to AD. Treated mice did not show any adverse events related to the compound. The lead compound significantly reduced the level of self-associated tau and total and phosphorylated insoluble tau aggregates. The dose response was linear with respect to levels of compound in the brain. A confirmatory study was performed with male htau mice that gave consistent results. The results validated our screening approach by showing that targeting tau self-association can inhibit the entire tau aggregation pathway by using the selected and optimized lead compound whose activity translated from in vitro and cellular assays to an in vivo model of tau aggregation.
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Affiliation(s)
| | | | | | - Heidy Jimenez
- The Litwin-Zucker Research Center for the Study of Alzheimer's Disease, The Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, USA
| | - Leslie Adrien
- The Litwin-Zucker Research Center for the Study of Alzheimer's Disease, The Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, USA
| | - Peter Davies
- The Litwin-Zucker Research Center for the Study of Alzheimer's Disease, The Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, USA
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11
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A 3-month-delayed treatment with anatabine improves chronic outcomes in two different models of repetitive mild traumatic brain injury in hTau mice. Sci Rep 2021; 11:7900. [PMID: 33846461 PMCID: PMC8041866 DOI: 10.1038/s41598-021-87161-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 03/24/2021] [Indexed: 02/01/2023] Open
Abstract
To date, an overwhelming number of preclinical studies have addressed acute treatment in mild TBI (mTBI) and repetitive mTBI (r-mTBI), whereas, in humans, there often exists a significant time gap between the injury and the first medical intervention. Our study focused on a delayed treatment with anatabine, an anti-inflammatory compound, in hTau mice using two different models of r-mTBI. The rationale for using two models of the same impact but different frequencies (5 hit mTBI over 9 days and 24 hit mTBI over 90 days) was chosen to address the heterogeneity of r-mTBI in clinical population. Following the last injury in each model, three months elapsed before the initiation of treatment. Anatabine was administered in drinking water for 3 months thereafter. Our data demonstrated that a 3-month delayed treatment with anatabine mitigated astrogliosis in both TBI paradigms but improved cognitive functions only in more-frequently-injured mice (24 hit mTBI). We also found that anatabine decreased the phosphorylation of tau protein and NFκB, which were increased after r-mTBI in both models. The ability of anatabine to suppress these mechanisms suggests that delayed treatment can be effective for clinical population of r-mTBI. The discrepancy between the two models with regard to changes in cognitive performance suggests that r-mTBI heterogeneity may influence treatment efficiency and should be considered in therapeutic development.
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12
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Gazdzinski LM, Mellerup M, Wang T, Adel SAA, Lerch JP, Sled JG, Nieman BJ, Wheeler AL. White Matter Changes Caused by Mild Traumatic Brain Injury in Mice Evaluated Using Neurite Orientation Dispersion and Density Imaging. J Neurotrauma 2020; 37:1818-1828. [PMID: 32242488 DOI: 10.1089/neu.2020.6992] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Mild traumatic brain injury (mTBI) is common and can lead to persistent cognitive and behavioral symptoms. Although diffusion tensor imaging (DTI) has demonstrated some sensitivity to changes in white matter following mTBI, recent studies have suggested that more complex geometric models of diffusion, including the neurite orientation dispersion and density imaging (NODDI) model, may be more sensitive and specific. Here, we evaluate microstructural changes in white matter following mTBI using DTI and NODDI in a mouse model, and compare the time course of these changes to behavioral impairment and recovery. We also assess volumetric changes for a comprehensive picture of the structural alterations in the brain and histological staining to identify cellular changes that may contribute to the differences detected in the imaging data. Increased orientation dispersion index (ODI) was observed in the optic tracts of mTBI mice compared with shams. Changes in fractional anisotropy (FA) were not statistically significant. Volume deficits were detected in the optic tract as well as in several gray matter regions: the lateral geniculate nuclei of the thalamus, the entorhinal cortex, and the superior colliculi. Glial fibrillary acidic protein (GFAP) and ionized calcium binding adaptor molecule 1 (Iba1) staining was increased in the optic tracts of mTBI brains, and this staining correlated with ODI values. A transient impairment in working memory was observed, which resolved by 6 weeks, whereas increased ODI, GFAP, and Iba1 persisted to 18 weeks post-injury. We conclude that the optic tracts are particularly vulnerable to damage from the closed-skull impact model used in this study, and that ODI may be a more sensitive metric to this damage than FA. Differences in ODI and in histological measures of astrogliosis, neuroinflammation, and axonal degeneration persist beyond behavioral impairment in this model.
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Affiliation(s)
- Lisa M Gazdzinski
- Neurosciences and Mental Health, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Miranda Mellerup
- Neurosciences and Mental Health, Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Physiology and University of Toronto, Toronto, Ontario, Canada
| | - Tong Wang
- Neurosciences and Mental Health, Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Physiology and University of Toronto, Toronto, Ontario, Canada
| | - Seyed Amir Ali Adel
- Neurosciences and Mental Health, Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Physiology and University of Toronto, Toronto, Ontario, Canada
| | - Jason P Lerch
- Neurosciences and Mental Health, Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada.,Wellcome Centre for Integrative Neuroimaging, Department of Clinical Neurosciences, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - John G Sled
- Translational Medicine, Hospital for Sick Children, Toronto, Ontario, Canada.,Mouse Imaging Centre at The Centre for Phenogenomics, Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - Brian J Nieman
- Translational Medicine, Hospital for Sick Children, Toronto, Ontario, Canada.,Mouse Imaging Centre at The Centre for Phenogenomics, Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada.,Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Anne L Wheeler
- Neurosciences and Mental Health, Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Physiology and University of Toronto, Toronto, Ontario, Canada
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13
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Ojo JO, Crynen G, Algamal M, Vallabhaneni P, Leary P, Mouzon B, Reed JM, Mullan M, Crawford F. Unbiased Proteomic Approach Identifies Pathobiological Profiles in the Brains of Preclinical Models of Repetitive Mild Traumatic Brain Injury, Tauopathy, and Amyloidosis. ASN Neuro 2020; 12:1759091420914768. [PMID: 32241177 PMCID: PMC7132820 DOI: 10.1177/1759091420914768] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
No concerted investigation has been conducted to explore overlapping and distinct
pathobiological mechanisms between repetitive mild traumatic brain injury
(r-mTBI) and tau/amyloid proteinopathies considering the long history of
association between TBI and Alzheimer’s disease. We address this problem by
using unbiased proteomic approaches to generate detailed time-dependent brain
molecular profiles of response to repetitive mTBI in C57BL/6 mice and in mouse
models of amyloidosis (with amyloid precursor protein KM670/671NL (Swedish) and
Presenilin 1 M146L mutations [PSAPP]) and tauopathy (hTau). Brain tissues from
animals were collected at different timepoints after injuries (24 hr–12 months
post-injury) and at different ages for tau or amyloid transgenic models (3, 9,
and 15 months old), encompassing the pre-, peri-, and post-“onset” of cognitive
and pathological phenotypes. We identified 30 hippocampal and 47 cortical
proteins that were significantly modulated over time in the r-mTBI compared with
sham mice. These proteins identified TBI-dependent modulation of
phosphatidylinositol-3-kinase/AKT signaling, protein kinase A signaling, and
PPARα/RXRα activation in the hippocampus and protein kinase A signaling,
gonadotropin-releasing hormone signaling, and B cell receptor signaling in the
cortex. Previously published neuropathological studies of our mTBI model showed
a lack of amyloid and tau pathology. In PSAPP mice, we identified 19 proteins
significantly changing in the cortex and only 7 proteins in hTau mice versus
wild-type littermates. When we explored the overlap between our r-mTBI model and
the PSAPP/hTau models, a fairly small coincidental change was observed involving
only eight significantly regulated proteins. This work suggests a very distinct
TBI neurodegeneration and also that other factors are needed to drive
pathologies such as amyloidosis and tauopathy postinjury.
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Affiliation(s)
- Joseph O Ojo
- Experimental Neuropathology and Proteomic Laboratory, Roskamp Institute, Sarasota, Florida, United States.,James A. Haley Veterans' Hospital, Tampa, Florida, United States.,School of Life, Health and Chemical Sciences, The Open University, Milton Keynes, United Kingdom
| | - Gogce Crynen
- Experimental Neuropathology and Proteomic Laboratory, Roskamp Institute, Sarasota, Florida, United States.,School of Life, Health and Chemical Sciences, The Open University, Milton Keynes, United Kingdom
| | - Moustafa Algamal
- Experimental Neuropathology and Proteomic Laboratory, Roskamp Institute, Sarasota, Florida, United States.,School of Life, Health and Chemical Sciences, The Open University, Milton Keynes, United Kingdom
| | - Prashanti Vallabhaneni
- Experimental Neuropathology and Proteomic Laboratory, Roskamp Institute, Sarasota, Florida, United States
| | - Paige Leary
- Experimental Neuropathology and Proteomic Laboratory, Roskamp Institute, Sarasota, Florida, United States
| | - Benoit Mouzon
- Experimental Neuropathology and Proteomic Laboratory, Roskamp Institute, Sarasota, Florida, United States.,James A. Haley Veterans' Hospital, Tampa, Florida, United States.,School of Life, Health and Chemical Sciences, The Open University, Milton Keynes, United Kingdom
| | - Jon M Reed
- Experimental Neuropathology and Proteomic Laboratory, Roskamp Institute, Sarasota, Florida, United States.,Boehringer Ingelheim Pharmaceuticals, Inc., Ridgefield, Connecticut, United States
| | - Michael Mullan
- Experimental Neuropathology and Proteomic Laboratory, Roskamp Institute, Sarasota, Florida, United States.,School of Life, Health and Chemical Sciences, The Open University, Milton Keynes, United Kingdom
| | - Fiona Crawford
- Experimental Neuropathology and Proteomic Laboratory, Roskamp Institute, Sarasota, Florida, United States.,James A. Haley Veterans' Hospital, Tampa, Florida, United States.,School of Life, Health and Chemical Sciences, The Open University, Milton Keynes, United Kingdom
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14
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Barron MR, Gartlon J, Dawson LA, Atkinson PJ, Pardon MC. Increasing Tau 4R Tau Levels Exacerbates Hippocampal Tau Hyperphosphorylation in the hTau Model of Tauopathy but Also Tau Dephosphorylation Following Acute Systemic Inflammation. Front Immunol 2020; 11:293. [PMID: 32194553 PMCID: PMC7066213 DOI: 10.3389/fimmu.2020.00293] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 02/05/2020] [Indexed: 11/13/2022] Open
Abstract
Inflammation is considered a mechanistic driver of Alzheimer's disease, thought to increase tau phosphorylation, the first step to the formation of neurofibrillary tangles (NFTs). To further understand how inflammation impacts the development of tau pathology, we used (hTau) mice, which express all six, non-mutated, human tau isoforms, but with an altered ratio of tau isoforms favoring 3R tau due to the concomitant loss of murine tau (mTau) that is predominantly 4R. Such an imbalance pattern has been related to susceptibility to NFTs formation, but whether or not this also affects susceptibility to systemic inflammation and related changes in tau phosphorylation is not known. To reduce the predominance of 3R tau by increasing 4R tau availability, we bred hTau mice on a heterozygous mTau background and compared the impact of systemic inflammation induced by lipopolysaccharide (LPS) in hTau mice hetero- or homozygous mTau knockout. Three-month-old male wild-type (Wt), mTau+/-, mTau-/-, hTau/mTau+/-, and hTau/mTau-/- mice were administered 100, 250, or 330 μg/kg of LPS or its vehicle phosphate buffer saline (PBS) [intravenously (i.v.), n = 8-9/group]. Sickness behavior, reflected by behavioral suppression in the spontaneous alternation task, hippocampal tau phosphorylation, measured by western immunoblotting, and circulating cytokine levels were quantified 4 h after LPS administration. The persistence of the LPS effects (250 μg/kg) on these measures, and food burrowing behavior, was assessed at 24 h post-inoculation in Wt, mTau+/-, and hTau/mTau+/- mice (n = 9-10/group). In the absence of immune stimulation, increasing 4R tau levels in hTau/mTau+/- exacerbated pS202 and pS396/404 tau phosphorylation, without altering total tau levels or worsening early behavioral perturbations characteristic of hTau/mTau-/- mice. We also show for the first time that modulating 4R tau levels in hTau mice affects the response to systemic inflammation. Behavior was suppressed in all genotypes 4 h following LPS administration, but hTau/mTau+/- exhibited more severe sickness behavior at the 100 μg/kg dose and a milder behavioral and cytokine response than hTau/mTau-/- mice at the 330 μg/kg dose. All LPS doses decreased tau phosphorylation at both epitopes in hTau/mTau+/- mice, but pS202 levels were selectively reduced at the 100 μg/kg dose in hTau/mTau-/- mice. Behavioral suppression and decreased tau phosphorylation persisted at 24 h following LPS administration in hTau/mTau+/- mice.
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Affiliation(s)
- Matthew R Barron
- School of Life Sciences, Division of Physiology, Pharmacology and Neuroscience, Medical School, Queens Medical Centre, University of Nottingham, Nottingham, United Kingdom
| | - Jane Gartlon
- EMEA Knowledge Centre, Eisai Ltd., Hatfield, United Kingdom
| | | | | | - Marie-Christine Pardon
- School of Life Sciences, Division of Physiology, Pharmacology and Neuroscience, Medical School, Queens Medical Centre, University of Nottingham, Nottingham, United Kingdom
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15
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The effects of mild closed head injuries on tauopathy and cognitive deficits in rodents: Primary results in wild type and rTg4510 mice, and a systematic review. Exp Neurol 2020; 326:113180. [PMID: 31930992 DOI: 10.1016/j.expneurol.2020.113180] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 12/02/2019] [Accepted: 01/09/2020] [Indexed: 12/17/2022]
Abstract
In humans, the majority of sustained traumatic brain injuries (TBIs) are classified as 'mild' and most often a result of a closed head injury (CHI). The effects of a non-penetrating CHI are not benign and may lead to chronic pathology and behavioral dysfunction, which could be worsened by repeated head injury. Clinical-neuropathological correlation studies provide evidence that conversion of tau into abnormally phosphorylated proteotoxic intermediates (p-tau) could be part of the pathophysiology triggered by a single TBI and enhanced by repeated TBIs. However, the link between p-tau and CHI in rodents remains controversial. To address this question experimentally, we induced a single CHI or two CHIs to WT or rTg4510 mice. We found that 2× CHI increased tau phosphorylation in WT mice and rTg4510 mice. Behavioral characterization in WT mice found chronic deficits in the radial arm water maze in 2× CHI mice that had partially resolved in the 1× CHI mice. Moreover, using Manganese-Enhanced Magnetic Resonance Imaging with R1 mapping - a novel functional neuroimaging technique - we found greater deficits in the rTg4510 mice following 2× CHI compared to 1× CHI. To integrate our findings with prior work in the field, we conducted a systematic review of rodent mild repetitive CHI studies. Following Prisma guidelines, we identified 25 original peer-reviewed papers. Results from our experiments, as well as our systematic review, provide compelling evidence that tau phosphorylation is modified by experimental mild TBI studies; however, changes in p-tau levels are not universally reported. Together, our results provide evidence that repetitive TBIs can result in worse and more persistent neurological deficits compared to a single TBI, but the direct link between the worsened outcome and elevated p-tau could not be established.
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16
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Kronsbein K, Karger B, Budczies J, Pfeiffer H, Wittschieber D. Updating the risk profile of fatal head trauma: an autopsy study with focus on age- and sex-dependent differences. Int J Legal Med 2019; 134:295-307. [PMID: 31735980 DOI: 10.1007/s00414-019-02187-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 10/15/2019] [Indexed: 11/28/2022]
Abstract
Fatal head trauma (FHT) represents one of the most frequent causes of death diagnosed in forensic pathology. However, profound statistic autopsy data on FHT is still sparse. Therefore, the purpose of this study was to investigate the circumstances and injury patterns of FHT with particular focus on age and sex, and additionally, to describe a recent risk profile of FHT. To this end, the forensic autopsy records of each FHT case at a large German university hospital during a 10-year period (2006-2015) were analyzed retrospectively (n = 372). The male-female ratio was 2.6:1. Regarding median age, females were 12.5 years older than males. Traffic-associated FHT represents the major mechanism of death, followed by fall-associated FHT. While accident was the major manner of death and presented a similar distribution of age and sex, homicides were the only subgroup with a significantly lower ratio between males and females. Skull fractures occurred in 78.2% and intracranial hemorrhages in 80.6% of all cases. In summary and partly in contrast to clinical data on head trauma, FHT still occurs predominantly in male individuals under the age of 45 years, in the context of traffic accidents and affected by alcohol intake. Improvements in traffic security as well as continuing surveillance of the incidence of FHT by forensic autopsies are necessary to further reduce the incidence of FHT.
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Affiliation(s)
- Katharina Kronsbein
- Institute of Legal Medicine, University Hospital Münster, Westfalian Wilhelms University, Münster, Germany
| | - Bernd Karger
- Institute of Legal Medicine, University Hospital Münster, Westfalian Wilhelms University, Münster, Germany
| | - Jan Budczies
- Institute of Pathology, Division of Biostatistics, University Hospital Heidelberg, Ruprecht Karls University, Heidelberg, Germany
| | - Heidi Pfeiffer
- Institute of Legal Medicine, University Hospital Münster, Westfalian Wilhelms University, Münster, Germany
| | - Daniel Wittschieber
- Institute of Legal Medicine, University Hospital Münster, Westfalian Wilhelms University, Münster, Germany. .,Institute of Legal Medicine, Jena University Hospital, Friedrich Schiller University, Am Klinikum 1, 07747, Jena, Germany.
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17
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Bolton-Hall AN, Hubbard WB, Saatman KE. Experimental Designs for Repeated Mild Traumatic Brain Injury: Challenges and Considerations. J Neurotrauma 2019; 36:1203-1221. [PMID: 30351225 PMCID: PMC6479246 DOI: 10.1089/neu.2018.6096] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Mild traumatic brain injury (mild TBI) is a growing public concern, as evidence mounts that even brain injuries classified as "mild" can result in persistent neurological dysfunction. Multiple brain injuries heighten the likelihood of worsened or more prolonged symptomatology and may trigger long-term neurodegeneration. Animal models provide a logical platform to identify key parameters, such as loading forces, duration between injuries, and number of injuries, which contribute to additive or synergistic damage after repeated mild TBI. Despite the tremendous increase in research productivity in the field of repeated mild TBI, relatively few studies have been designed in such a way as to provide experimental-based insights into the dependence of cellular and functional outcomes on the prescribed parameters of mild TBI. In this review, we summarize how standard models of TBI have been adapted to produce mild TBI and highlight commonly observed aspects of neuropathology replicated in rodent models of mild TBI. The complexity of designing studies of repeated TBI is discussed, including challenges of incorporating appropriate control groups, informative experimental design, and relevant outcome measures. We then feature studies that provide a well-controlled, within-study design varying either the number of injuries or the interinjury interval. Harnessing the power of experimental models of TBI to elucidate which injury parameters are critical contributors to acute and chronic damage after repeated injury can further efforts at prevention and provide improved models for testing mechanisms and therapeutic interventions.
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Affiliation(s)
- Amanda N. Bolton-Hall
- Spinal Cord and Brain Injury Research Center, University of Kentucky College of Medicine, Lexington, Kentucky
- Department of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky
- Department of Neurosurgery, Wayne State University School of Medicine, Detroit, Michigan
| | - W. Brad Hubbard
- Spinal Cord and Brain Injury Research Center, University of Kentucky College of Medicine, Lexington, Kentucky
- Department of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky
- Department of Neuroscience, University of Kentucky College of Medicine, Lexington, Kentucky
| | - Kathryn E. Saatman
- Spinal Cord and Brain Injury Research Center, University of Kentucky College of Medicine, Lexington, Kentucky
- Department of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky
- Department of Neurosurgery, University of Kentucky College of Medicine, Lexington, Kentucky
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18
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Hubbard WB, Joseph B, Spry M, Vekaria HJ, Saatman KE, Sullivan PG. Acute Mitochondrial Impairment Underlies Prolonged Cellular Dysfunction after Repeated Mild Traumatic Brain Injuries. J Neurotrauma 2018; 36:1252-1263. [PMID: 30417732 DOI: 10.1089/neu.2018.5990] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Mild traumatic brain injuries (mTBI), accounting for more than 80% of TBIs, can cause cognitive and behavioral impairments, the severity and duration of which increase after additional mTBIs. While mTBI does not cause widespread neuronal death, the mechanisms underlying increased cellular susceptibility to subsequent head impacts remain unknown. To investigate the hypothesis that altered mitochondrial bioenergetics underlie cellular vulnerability to repeated insults, we employed a mouse model of mild closed head injury (CHI) to examine mitochondrial function and oxidative stress, because these mechanisms are often intertwined. Mitochondrial respiration was assayed (Seahorse XFe24 Flux Analyzer) from cortex and hippocampus collected at 6 h, 24 h, 48 h, and 96 h post-injury. State III (adenosine diphosphate [ADP]-mediated) respiration was significantly decreased in the hippocampal mitochondria of the CHI group compared with sham at 48 h post-injury. Further, cortex-derived mitochondria exhibited a decrease in State III respiration at 24 h and 48 h post-injury. No significant differences were observed at 6 h or 96 h post-injury in either region of interest. A second CHI repeated either 48 h or 96 h after the first did not worsen State III respiration at 48 h after the final injury compared with a single CHI, but CHI repeated at a 48 h interval prolonged cortical mitochondrial dysfunction to 96 h after the final injury. Markers of oxidative stress were significantly elevated after two CHIs delivered 48 h apart, but not after single CHI or two CHI delivered 96 h apart. This study establishes that mTBI results in early mitochondrial dysfunction, which may be a determinant for cellular vulnerability to repeated head impacts. Thus, therapies targeting mitochondrial impairment could improve outcomes after repeated mTBI.
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Affiliation(s)
- W Brad Hubbard
- 1 Spinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, Kentucky
| | - Binoy Joseph
- 1 Spinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, Kentucky
| | - Malinda Spry
- 1 Spinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, Kentucky
| | - Hemendra J Vekaria
- 1 Spinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, Kentucky
| | - Kathryn E Saatman
- 1 Spinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, Kentucky.,2 Department of Physiology, University of Kentucky, Lexington, Kentucky
| | - Patrick G Sullivan
- 1 Spinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, Kentucky.,3 Department of Neuroscience, University of Kentucky, Lexington, Kentucky.,4 Lexington VAMC, Lexington, Kentucky
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19
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Morin A, Mouzon B, Ferguson S, Paris D, Saltiel N, Lungmus C, Mullan M, Crawford F. Treatment With Nilvadipine Mitigates Inflammatory Pathology and Improves Spatial Memory in Aged hTau Mice After Repetitive Mild TBI. Front Aging Neurosci 2018; 10:292. [PMID: 30364309 PMCID: PMC6193195 DOI: 10.3389/fnagi.2018.00292] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 09/04/2018] [Indexed: 12/14/2022] Open
Abstract
Mild traumatic brain injury (mTBI) is the most common form of brain trauma worldwide. The effects of mTBI are not well-studied within the elderly population, yet older adults constitute a significant portion of all mTBI patients. Few preclinical studies have focused on the effects of mTBI, or mTBI treatments, in the aged brain, and none have explored repetitive mTBI (r-mTBI). In this study, we have administered our well-characterized 5-injury model (5 r-mTBI) to hTau mice aged 24 months to explore the neurobehavioral and neuropathological outcomes, and the effects of treatment with the dihydropyridine, Nilvadipine. Our previous studies have shown that Nilvadipine inhibits spleen tyrosine kinase (Syk), is effective at reducing inflammation, tau hyperphosphorylation, and amyloid production, and it has recently been investigated in a European Phase III clinical trial for Alzheimer’s disease (AD). In our 24-month-old r-mTBI mice, we observed increased neuroinflammation and a trend toward impaired cognitive performance compared to sham controls. Treatment with Nilvadipine mitigated the TBI-induced inflammatory response in aged r-mTBI animals and significantly improved spatial memory. To our knowledge, this is the only preclinical study focusing on the treatment of r-mTBI in aged, and these results suggest a therapeutic potential of Nilvadipine for consequences of mTBI.
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Affiliation(s)
- Alexander Morin
- The Roskamp Institute, Sarasota, FL, United States.,The Open University, Milton-Keynes, United Kingdom.,James A Haley Veterans Administration, Tampa, FL, United States
| | - Benoit Mouzon
- The Roskamp Institute, Sarasota, FL, United States.,The Open University, Milton-Keynes, United Kingdom.,James A Haley Veterans Administration, Tampa, FL, United States
| | - Scott Ferguson
- The Roskamp Institute, Sarasota, FL, United States.,The Open University, Milton-Keynes, United Kingdom.,James A Haley Veterans Administration, Tampa, FL, United States
| | - Daniel Paris
- The Roskamp Institute, Sarasota, FL, United States.,The Open University, Milton-Keynes, United Kingdom.,James A Haley Veterans Administration, Tampa, FL, United States
| | - Nicole Saltiel
- The Roskamp Institute, Sarasota, FL, United States.,James A Haley Veterans Administration, Tampa, FL, United States
| | | | - Mike Mullan
- The Roskamp Institute, Sarasota, FL, United States.,The Open University, Milton-Keynes, United Kingdom
| | - Fiona Crawford
- The Roskamp Institute, Sarasota, FL, United States.,The Open University, Milton-Keynes, United Kingdom.,James A Haley Veterans Administration, Tampa, FL, United States
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Adams C, Bazzigaluppi P, Beckett TL, Bishay J, Weisspapir I, Dorr A, Mester JR, Steinman J, Hirschler L, Warnking JM, Barbier EL, McLaurin J, Sled JG, Stefanovic B. Neurogliovascular dysfunction in a model of repeated traumatic brain injury. Am J Cancer Res 2018; 8:4824-4836. [PMID: 30279740 PMCID: PMC6160760 DOI: 10.7150/thno.24747] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 08/02/2018] [Indexed: 12/13/2022] Open
Abstract
Traumatic brain injury (TBI) research has focused on moderate to severe injuries as their outcomes are significantly worse than those of a mild TBI (mTBI). However, recent epidemiological evidence has indicated that a series of even mild TBIs greatly increases the risk of neurodegenerative and psychiatric disorders. Neuropathological studies of repeated TBI have identified changes in neuronal ionic concentrations, axonal injury, and cytoskeletal damage as important determinants of later life neurological and mood compromise; yet, there is a paucity of data on the contribution of neurogliovascular dysfunction to the progression of repeated TBI and alterations of brain function in the intervening period. Methods: Here, we established a mouse model of repeated TBI induced via three electromagnetically actuated impacts delivered to the intact skull at three-day intervals and determined the long-term deficits in neurogliovascular functioning in Thy1-ChR2 mice. Two weeks post the third impact, cerebral blood flow and cerebrovascular reactivity were measured with arterial spin labelling magnetic resonance imaging. Neuronal function was investigated through bilateral intracranial electrophysiological responses to optogenetic photostimulation. Vascular density of the site of impacts was measured with in vivo two photon fluorescence microscopy. Pathological analysis of neuronal survival and astrogliosis was performed via NeuN and GFAP immunofluorescence. Results: Cerebral blood flow and cerebrovascular reactivity were decreased by 50±16% and 70±20%, respectively, in the TBI cohort relative to sham-treated animals. Concomitantly, electrophysiological recordings revealed a 97±1% attenuation in peri-contusional neuronal reactivity relative to sham. Peri-contusional vascular volume was increased by 33±2% relative to sham-treated mice. Pathological analysis of the peri-contusional cortex demonstrated astrogliosis, but no changes in neuronal survival. Conclusion: This work provides the first in-situ characterization of the long-term deficits of the neurogliovascular unit following repeated TBI. The findings will help guide the development of diagnostic markers as well as therapeutics targeting neurogliovascular dysfunction.
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Mouzon B, Bachmeier C, Ojo J, Acker C, Ferguson S, Crynen G, Davies P, Mullan M, Stewart W, Crawford F. Chronic White Matter Degeneration, but No Tau Pathology at One-Year Post-Repetitive Mild Traumatic Brain Injury in a Tau Transgenic Model. J Neurotrauma 2018; 36:576-588. [PMID: 29993324 DOI: 10.1089/neu.2018.5720] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Tau pathology associated with chronic traumatic encephalopathy has been documented in the brains of individuals with a history of repetitive mild traumatic brain injury (r-mTBI). At this stage, the pathobiological role of tau in r-mTBI has not been extensively explored in appropriate pre-clinical models. Here, we describe the acute and chronic behavioral and histopathological effects of single and repetitive mild TBI (five injuries given at 48 h intervals) in young adult (3 months old) hTau mice that express all six isoforms of hTau on a null murine tau background. Animals exposed to r-mTBI showed impaired visuospatial learning in the Barnes maze test that progressively worsened from two weeks to 12 months post-injury, which was also accompanied by significant deficits in visuospatial memory consolidation at 12 months post-injury. In contrast, only marginal changes were observed in visuospatial learning at six and 12 months after single mTBI. Histopathological analyses revealed that hTau mice developed axonal injury, thinning of the corpus callosum, microgliosis and astrogliosis in the white matter at acute and chronic time points after injury. Tau immunohistochemistry and enzyme-linked immunosorbent assay data suggest, however, only transient, injury-dependent increases in phosphorylated tau in the cerebral cortex beneath the impact site and in the CA1/CA3 subregion of the hippocampus after single or r-mTBI. This study implicates white matter degeneration as a prominent feature of survival from mTBI, while the role of tau pathology in the neuropathological sequelae of TBI remains elusive.
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Affiliation(s)
| | | | | | | | | | | | - Peter Davies
- 2 Feinstein Institute for Medical Research , Manhasset, New York
| | | | - William Stewart
- 3 Department of Neuropathology, Laboratory Medicine Building, Queen Elizabeth University Hospital , Glasgow, Scotland
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