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Chronic traumatic encephalopathy

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https://www.readbyqxmd.com/read/28420443/tau-phosphorylation-induced-by-severe-closed-head-traumatic-brain-injury-is-linked-to-the-cellular-prion-protein
#1
Richard Rubenstein, Binggong Chang, Natalia Grinkina, Eleanor Drummond, Peter Davies, Meir Ruditzky, Deep Sharma, Kevin Wang, Thomas Wisniewski
Studies in vivo and in vitro have suggested that the mechanism underlying Alzheimer's disease (AD) neuropathogenesis is initiated by an interaction between the cellular prion protein (PrP(C)) and amyloid-β oligomers (Aβo). This PrP(C)-Aβo complex activates Fyn kinase which, in turn, hyperphosphorylates tau (P-Tau) resulting in synaptic dysfunction, neuronal loss and cognitive deficits. AD transgenic mice lacking PrP(C) accumulate Aβ, but show normal survival and no loss of spatial learning and memory suggesting that PrP(C) functions downstream of Aβo production but upstream of intracellular toxicity within neurons...
April 18, 2017: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/28413156/exposure-of-the-amino-terminus-of-tau-is-a-pathological-event-in-multiple-tauopathies
#2
Benjamin Combs, Nicholas M Kanaan
Pathological changes to the tau protein, including conformational changes and aggregation, are major hallmarks of a group of neurodegenerative disorders known as tauopathies. Among the conformational changes are alterations involving the extreme amino terminus of the protein, known as the phosphatase-activating domain (PAD). Aberrant PAD exposure induces a signaling cascade that leads to disruption of axonal transport, a critical function for neuronal survival. Conformational display of PAD is an early marker of pathological tau in Alzheimer disease (AD), but its role in other tauopathies has yet to be firmly established...
April 13, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28390515/chronic-traumatic-encephalopathy-known-causes-unknown-effects
#3
REVIEW
Diego Iacono, Sharon B Shively, Brian L Edlow, Daniel P Perl
Chronic traumatic encephalopathy (CTE) is a neuropathologic diagnosis typically made in human brains with a history of repetitive traumatic brain injury (rTBI). It remains unknown whether CTE occurs exclusively after rTBI, or whether a single TBI (sTBI) can cause CTE. Similarly, it is unclear whether impact (eg, motor vehicle accidents) and non-impact (eg, blasts) types of energy transfer trigger divergent or common pathologies. While it is established that a history of rTBI increases the risk of multiple neurodegenerative diseases (eg, dementia, parkinsonism, and CTE), the possible pathophysiologic and molecular mechanisms underlying these risks have yet to be elucidated...
May 2017: Physical Medicine and Rehabilitation Clinics of North America
https://www.readbyqxmd.com/read/28370398/tau-aggregates-where-when-why-and-what-consequences
#4
EDITORIAL
Matthew P Frosch
Neuropathologists have been aware of neurofibrillary tangles for more than a century following their description as part of Alois Alzheimer's initial report. Since those early days, our understanding of the relationship of this particular type of cellular inclusion associated with neurodegeneration has continually broadened. Textbooks, now a partially antiquated concept, commonly list a range of disorders as being associated with tangles -NDASH- including typical neurodegenerative diseases (Alzheimer disease [AD], forms of frontotemporal lobar degenerations [FTLD-tau], progressive supranuclear palsy [PSP], corticobasal degeneration [CBD], primary aged related tauopathy [PART]), secondary degenerative diseases such as chronic traumatic encephalopathy, metabolic disease (Niemann-Pick disease type C) and infections (SSPE)...
April 2, 2017: Neuropathology and Applied Neurobiology
https://www.readbyqxmd.com/read/28370167/tau-aggregates-where-when-why-and-what-consequences
#5
EDITORIAL
Matthew P Frosch
Neuropathologists have been aware of neurofibrillary tangles for more than a century following their description as part of Alois Alzheimer's initial report. Since those early days, our understanding of the relationship of this particular type of cellular inclusion associated with neurodegeneration has continually broadened. Textbooks, now a partially antiquated concept, commonly list a range of disorders as being associated with tangles -NDASH- including typical neurodegenerative diseases (Alzheimer disease [AD], forms of frontotemporal lobar degenerations [FTLD-tau], progressive supranuclear palsy [PSP], corticobasal degeneration [CBD], primary aged related tauopathy [PART]), secondary degenerative diseases such as chronic traumatic encephalopathy, metabolic disease (Niemann-Pick disease type C) and infections (SSPE)...
March 30, 2017: Neuropathology and Applied Neurobiology
https://www.readbyqxmd.com/read/28365421/quantitative-validation-of-a-nonlinear-histology-mri-coregistration-method-using-generalized-q-sampling-imaging-in-complex-human-cortical-white-matter
#6
Mihika Gangolli, Laurena Holleran, Joong Hee Kim, Thor D Stein, Victor Alvarez, Ann C McKee, David L Brody
Advanced diffusion MRI methods have recently been proposed for detection of pathologies such as traumatic axonal injury and chronic traumatic encephalopathy which commonly affect complex cortical brain regions. However, radiological-pathological correlations in human brain tissue that detail the relationship between the multi-component diffusion signal and underlying pathology are lacking. We present a nonlinear voxel based two dimensional coregistration method that is useful for matching diffusion signals to quantitative metrics of high resolution histological images...
March 30, 2017: NeuroImage
https://www.readbyqxmd.com/read/28347679/chronic-traumatic-encephalopathy-the-cellular-sequela-to-repetitive-brain-injury
#7
REVIEW
Alexander R Vile, Leigh Atkinson
This review aims to integrate current literature on the pathogenic mechanisms of Chronic Traumatic Encephalopathy (CTE) to create a multifactorial understanding of the disease. CTE is a progressive neurodegenerative disease, classed as a tauopathy, although it appears the pathogenic mechanisms are more complex than this. It affects those with a history of repetitive mild traumatic brain injury. Currently, there are no treatments for CTE and the disease can only be affirmatively diagnosed in post mortem. Understanding the pathogenesis of the disease will provide an avenue to explore possible treatment and diagnostic modalities...
March 24, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28338593/clinical-correlates-to-assist-with-cte-diagnosis-insights-from-a-novel-rodent-repeat-concussion-model
#8
Gretchen M Thomsen, Ara Ko, Megan Y Harada, Annie Ma, Livia Wyss, Patricia Haro, Jean-Philippe Vit, Pablo Avalos, Navpreet Dhillon, Noell Cho, Oksana Shelest, Eric J Ley
INTRODUCTION: Chronic traumatic encephalopathy (CTE) is a neurodegenerative disease linked to repetitive head injuries. CTE symptoms include changes in mood, behavior, cognition and motor function, however CTE is only currently diagnosed post-mortem. Using a rat model of recurrent traumatic brain injury (TBI) we demonstrate rodent deficits that predict the severity of CTE-like brain pathology. METHODS: Bilateral, closed skull, mild TBI was administered once per week to 35 WT rats, 8 rats received 2 injuries ('2xTBI'), 27 rats received 5 injuries ('5xTBI') and 13 rats were sham controls...
March 23, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28335005/tdp-43-suppresses-tau-expression-via-promoting-its-mrna-instability
#9
Jianlan Gu, Feng Wu, Wen Xu, Jianhua Shi, Wen Hu, Nana Jin, Wei Qian, Xinglong Wang, Khalid Iqbal, Cheng-Xin Gong, Fei Liu
In the brains of individuals with Alzheimer's disease (AD) and chronic traumatic encephalopathy, tau pathology is accompanied usually by intracellular aggregation of transactive response DNA-binding protein 43 (TDP-43). However, the role of TDP-43 in tau pathogenesis is not understood. Here, we investigated the role of TDP-43 in tau expression in vitro and in vivo. We found that TDP-43 suppressed tau expression by promoting its mRNA instability through the UG repeats of its 3΄-untranslated region (3΄-UTR)...
March 15, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28327371/longitudinal-changes-in-linguistic-complexity-among-professional-football-players
#10
Visar Berisha, Shuai Wang, Amy LaCross, Julie Liss, Pamela Garcia-Filion
Reductions in spoken language complexity have been associated with the onset of various neurological disorders. The objective of this study is to analyze whether similar trends are found in professional football players who are at risk for chronic traumatic encephalopathy. We compare changes in linguistic complexity (as indexed by the type-to-token ratio and lexical density) measured from the interview transcripts of players in the National Football League (NFL) to those measured from interview transcripts of coaches and/or front-office NFL executives who have never played professional football...
March 16, 2017: Brain and Language
https://www.readbyqxmd.com/read/28326890/functional-and-molecular-correlates-following-single-and-repeated-rat-closed-head-concussion-indices-of-vulnerability-following-brain-injury
#11
Andrea Mountney, Angela Boutte, Casandra M Cartagena, William J Flerlage, David Johnson, Chanyang Rho, Xi-Chun M Lu, Angela M Yarnell, Sean R Marcsisin, Jason Sousa, Chau Vuong, Victor E Zottig, Lai Yee Leung, Ying Deng-Bryant, Janice Gilsdorf, Frank C Tortella, Deborah A Shear
Closed-head concussive injury is one of the most common causes of traumatic brain injury (TBI). Isolated concussions frequently produce acute neurological impairments; however, individuals typically recover spontaneously within a short time frame. In contrast, brain injuries resulting from multiple concussions can result in cumulative damage and elevated risk of developing chronic brain pathologies, including chronic traumatic encephalopathy (CTE). Increased attention has focused on identification of diagnostic markers that can prognostically serve as indices of brain health after injury, revealing the temporal profile of vulnerability to a second insult...
March 22, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28269777/what-is-the-relationship-of-traumatic-brain-injury-to-dementia
#12
Mario F Mendez
There is a long history linking traumatic brain injury (TBI) with the development of dementia. Despite significant reservations, such as recall bias or concluding causality for TBI, a summary of recent research points to several conclusions on the TBI-dementia relationship. 1) Increasing severity of a single moderate-to-severe TBI increases the risk of subsequent Alzheimer's disease (AD), the most common type of dementia. 2) Repetitive, often subconcussive, mild TBIs increases the risk for chronic traumatic encephalopathy (CTE), a degenerative neuropathology...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28254594/the-current-status-of-research-on-chronic-traumatic-encephalopathy
#13
REVIEW
Kenneth Perrine, Jacqueline Helcer, Apostolos John Tsiouris, David J Pisapia, Philip Stieg
Chronic Traumatic Encephalopathy (CTE) evolved from the term "dementia pugilistica" describing the dementia found in many boxers to its current use in describing the dementia and depression sometimes found in athletes subjected to multiple concussions or sub-concussive blows to the head. Concurrently, the neuropathology evolved to specify a unique type of tauopathy found in perivascular spaces at the depth of sulci and other features not typically seen in neurodegenerative tauopathies. Four stages of CTE have been proposed, with four corresponding clinical syndromes of Traumatic Encephalopathy Syndrome...
February 27, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28234788/the-role-of-microglia-in-the-etiology-and-evolution-of-chronic-traumatic-encephalopathy
#14
Hadijat M Makinde, Talia B Just, Carla M Cuda, Harris Perlman, Steven J Schwulst
Chronic traumatic encephalopathy (CTE) is a progressive neurodegenerative disease that presents as a late sequela from traumatic brain injury (TBI). Traumatic brain injury is a growing and under-recognized public health concern with a high degree of morbidity and large associated global costs. While the immune response to TBI is complex, its contribution to the development of CTE remains largely unknown. In this review, we summarize the current understanding of the link between CTE and the resident innate immune system of the brain- microglia...
February 23, 2017: Shock
https://www.readbyqxmd.com/read/28229128/repetitive-head-impact-exposure-and-later-life-plasma-total-tau-in-former-national-football-league-players
#15
Michael L Alosco, Yorghos Tripodis, Johnny Jarnagin, Christine M Baugh, Brett Martin, Christine E Chaisson, Nate Estochen, Linan Song, Robert C Cantu, Andreas Jeromin, Robert A Stern
INTRODUCTION: Blood protein analysis of total tau (t-tau) may be a practical screening biomarker for chronic traumatic encephalopathy (CTE), a neurodegenerative tauopathy associated with repetitive head impact (RHI) exposure. We examined plasma t-tau in symptomatic former National Football League (NFL) players compared with controls and the relationship between RHI exposure and later-life plasma t-tau. METHODS: Ninety-six former NFL players (age 40-69) and 25 same-age controls underwent blood draw to determine plasma t-tau levels...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28214960/axonal-disruption-in-white-matter-underlying-cortical-sulcus-tau-pathology-in-chronic-traumatic-encephalopathy
#16
Laurena Holleran, Joong Hee Kim, Mihika Gangolli, Thor Stein, Victor Alvarez, Ann McKee, David L Brody
Chronic traumatic encephalopathy (CTE) is a progressive degenerative disorder associated with repetitive traumatic brain injury. One of the primary defining neuropathological lesions in CTE, based on the first consensus conference, is the accumulation of hyperphosphorylated tau in gray matter sulcal depths. Post-mortem CTE studies have also reported myelin loss, axonal injury and white matter degeneration. Currently, the diagnosis of CTE is restricted to post-mortem neuropathological analysis. We hypothesized that high spatial resolution advanced diffusion MRI might be useful for detecting white matter microstructural changes directly adjacent to gray matter tau pathology...
March 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28205009/mixed-pathologies-including-chronic-traumatic-encephalopathy-account-for-dementia-in-retired-association-football-soccer-players
#17
Helen Ling, Huw R Morris, James W Neal, Andrew J Lees, John Hardy, Janice L Holton, Tamas Revesz, David D R Williams
In retired professional association football (soccer) players with a past history of repetitive head impacts, chronic traumatic encephalopathy (CTE) is a potential neurodegenerative cause of dementia and motor impairments. From 1980 to 2010, 14 retired footballers with dementia were followed up regularly until death. Their clinical data, playing career, and concussion history were prospectively collected. Next-of-kin provided consent for six to have post-mortem brain examination. Of the 14 male participants, 13 were professional and 1 was a committed amateur...
March 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28204864/high-bioavailability-curcumin-an-anti-inflammatory-and-neurosupportive-bioactive-nutrient-for-neurodegenerative-diseases-characterized-by-chronic-neuroinflammation
#18
REVIEW
Faheem Ullah, Andy Liang, Alejandra Rangel, Erika Gyengesi, Garry Niedermayer, Gerald Münch
Neuroinflammation is a pathophysiological process present in a number of neurodegenerative disorders, such as Alzheimer's disease, Huntington's disease, Parkinson's disease, stroke, traumatic brain injury including chronic traumatic encephalopathy and other age-related CNS disorders. Although there is still much debate about the initial trigger for some of these neurodegenerative disorders, during the progression of disease, broad range anti-inflammatory drugs including cytokine suppressive anti-inflammatory drugs (CSAIDs) might be promising therapeutic options to limit neuroinflammation and improve the clinical outcome...
February 15, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28187811/determinants-of-prognosis-in-neurocatastrophes
#19
REVIEW
K Sharma, R D Stevens
A neurocatastrophe or severe brain injury (SBI) is a central nervous system insult associated with a high likelihood of death or severe disability. While many etiologic processes may lead to SBI, the most common and best-studied clinical paradigms are traumatic brain injury and anoxic-ischemic encephalopathy following cardiac arrest. Clinical phenotypes following SBI include acute and chronic disorders of consciousness as well as a range of cognitive and behavioral impairments. A fundamental task for medical teams working in the acute phase is to estimate SBI recovery probabilities with the highest degree of accuracy possible...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28181891/-chronic-traumatic-encephalopathy-an-old-acquaintance-in-athletes
#20
E G B Vijverberg, A C M Pijnenburg, P Scheltens, Y A L Pijnenburg
- Chronic traumatic encephalopathy (CTE) is a neurodegenerative disease caused by repetitive head injuries like those seen in sports such as boxing, American football and soccer.- The clinical features of CTE are a range of cognitive, psychiatric and motor symptoms, and histopathology involves deposits of hyperphosphorylated tau protein and the presence of TAR DNA-binding protein (TDP-43) with relatively little beta-amyloid.- CTE is difficult to differentiate clinically from Alzheimer's disease, frontotemporal dementia and psychiatric disorders because of the major symptom overlap between these conditions...
2017: Nederlands Tijdschrift Voor Geneeskunde
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