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https://www.readbyqxmd.com/read/29150743/differential-response-of-neural-cells-to-trauma-induced-swelling-in-vitro
#1
A R Jayakumar, M Taherian, K S Panickar, N Shamaladevi, M E Rodriguez, B G Price, M D Norenberg
Brain edema and the associated increase in intracranial pressure are major consequences of traumatic brain injury (TBI) that accounts for most early deaths after TBI. We recently showed that acute severe trauma to cultured astrocytes results in cell swelling. We further examined whether trauma induces cell swelling in neurons and microglia. We found that severe trauma also caused cell swelling in cultured neurons, whereas no swelling was observed in microglia. While severe trauma caused cell swelling in both astrocytes and neurons, mild trauma to astrocytes, neurons, and microglia failed to cell swelling...
November 17, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/29149810/exacerbation-of-acute-traumatic-brain-injury-by-circulating-extracellular-vesicles
#2
Isla Hazleton, Abi Yates, Ashley Dale, Jay Roodselaar, Naveed Akbar, Marc Ruitenberg, Daniel C Anthony, Yvonne Couch
Inflammatory lesions in the brain activate a systemic acute phase response (APR), which is dependent on the release of extracellular vesicles (EVs) into the circulation. The resulting APR is responsible for regulating leukocyte mobilization and subsequent recruitment to the brain. Factors that either exacerbate or inhibit the APR will also exacerbate or inhibit CNS inflammation as a consequence, and have the potential to influence ongoing secondary damage. Here, we were interested to discover how the circulating EV population changes after traumatic brain injury (TBI) and how manipulation of the circulating EV pool impacts on the outcome of TBI...
November 17, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29149394/challenges-and-opportunities-for-pediatric-severe-tbi-review-of-the-evidence-and-exploring-a-way-forward
#3
Michael J Bell, P David Adelson, Stephen R Wisniewski
Traumatic brain injury (TBI) is a leading killer of children in the developed and developing world. Despite evidence-based guidelines and several recent clinical trials, the progress in developing best practices for children with severe TBI has been slow. This article describes (i) the burden of the disease, (ii) the inadequacies of the evidence-based guidelines, (iii) the failure of the largest clinical trials to prove their primary hypotheses, and (iv) possible advances from an observational cohort study called the Approaches and Decisions for Acute Pediatric TBI (ADAPT) Trial that has recently completed enrollment...
October 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29149393/challenges-in-minor-tbi-and-indications-for-head-ct-in-pediatric-tbi-an-update
#4
Navneet Singh, Ash Singhal
INTRODUCTION: Pediatric head trauma is one of the commonest presentations to emergency departments. Over 90% of such head injuries are considered mild, but still present risk acute clinical deterioration and longer term morbidity. Identifying which children are at risk of clinically important brain injuries remains challenging and much of the data on minor head injuries is based on the adult population. CHALLENGES IN PEDIATRICS: Children, however, are different, both anatomically and in terms of mechanism of injury, to adults and, even within the pediatric group, there are differences with age and stage of development...
October 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29149389/autoregulation-in-paediatric-tbi-current-evidence-and-implications-for-treatment
#5
REVIEW
Joseph E Donnelly, Adam M H Young, Ken Brady
BACKGROUND: Children who survive acute traumatic brain injury are at risk of death from subsequent brain swelling and secondary injury. Strict physiologic management in the ICU after traumatic brain injury is believed to be key to survival, and cerebral perfusion pressure is a prominent aspect of post brain injury care. However, optimal cerebral perfusion pressure targets for children are not known. Autoregulation monitoring has been used to delineate individualized optimal perfusion pressures for patients with traumatic brain injury...
October 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29148640/short-term-outcome-of-operated-traumatic-brain-injury-patients-for-intracranial-hemorrhage-at-tikur-anbessa-specialized-teaching-hospital-tasth-addis-ababa-ethiopia
#6
Hagos Biluts, Azarias Kassahun, Mersha Abebe
Background: Traumatic brain injury is the leading cause of death and disability in people younger than 40 years of age worldwide. Objective: The study primarily aims at assessing the short-term outcome of patients operated for traumatic intracranial hemorrhage. Patients and Methods: This is a hospital based cross sectional study on patients with traumatic brain injury at Tikur Anbessa Specialized Teaching Hospital in Addis Ababa, Ethiopia, between February 2013 and February 2014...
January 2017: Ethiopian Medical Journal
https://www.readbyqxmd.com/read/29142634/factors-associated-postoperative-hydrocephalus-in-patients-with-traumatic-acute-subdural-hemorrhage
#7
Han Kim, Heui Seung Lee, Sung Yeol Ahn, Sung Chun Park, Won Huh
Objective: Postoperative hydrocephalus is a common complication following craniectomy in patients with traumatic brain injury, and affects patients' long-term outcomes. This study aimed to verify the risk factors associated with the development of hydrocephalus after craniectomy in patients with acute traumatic subdural hemorrhage (tSDH). Methods: Patients with acute traumatic SDH who had received a craniectomy between December 2005 and January 2016 were retrospectively assessed by reviewing the coexistence of other types of hemorrahges, measurable variables on computed tomography (CT) scans, and the development of hydrocephalus during the follow-up period...
November 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/29140952/-don-t-lose-hope-early-hemorrhagic-diffuse-axonal-injury-on-head-ct-is-not-associated-with-poor-outcome-in-moderate-severe-tbi-patients
#8
Nils Henninger, Rebecca A Compton, Muhammad W Khan, Raphael Carandang, Wiley Hall, Susanne Muehlschlegel
BACKGROUND: Diffuse axonal injury (DAI) on MRI has been associated with poor functional outcome after moderate-severe traumatic brain injury (msTBI). Yet, DAI assessment with highly-sensitive MRI-techniques is unfeasible in the acute trauma setting, and CT remains the key diagnostic modality despite its lower sensitivity. We sought to determine whether CT-defined-hemorrhagic-DAI (hDAI) is associated with discharge and favorable 3-and 12-month functional outcome (Glasgow Outcome Score ≥4) after msTBI...
November 14, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29140832/platelet-function-changes-in-a-time-dependent-manner-following-traumatic-brain-injury-in-a-murine-model
#9
Grace E Martin, Brent Xia, Young Kim, Mark D Johnson, Rosalie Veile, Lou Ann Friend, Amy T Makley, Charles C Caldwell, Michael D Goodman
Traumatic brain injury (TBI) results in systemic changes in coagulation and inflammation that contribute to post-traumatic morbidity and mortality. The potential interaction of platelets and pro-inflammatory cytokines in the modulation of coagulation, microthrombosis, and venous thromboembolic events after moderate TBI (TBI) has not been determined. Using a murine model, we hypothesized 1) that the degree of platelet-induced coagulation varies depending on the platelet aggregation agonist 2) platelet-induced coagulation changes in a time-dependent manner following TBI, and 3) changes in platelet-induced coagulation are mirrored by changes in the levels of circulating pro-inflammatory cytokines...
November 14, 2017: Shock
https://www.readbyqxmd.com/read/29138854/ng25-an-inhibitor-of-transforming-growth-factor%C3%A2-%C3%AE-%C3%A2-activated-kinase-1-ameliorates-neuronal-apoptosis-in-neonatal-hypoxic%C3%A2-ischemic-rats
#10
Hua Wang, Zhong Chen, Yu Li, Qiaoyun Ji
Transforming growth factor (TGF)‑β‑activated kinase 1 (TAK1) was found to be activated by TGF‑β and acts as a central regulator of cell death in various types of disease. However, the expression and function of TAK1 in the neonatal brain following hypoxia‑ischemia (HI) remains unclear. In the present study, western blotting and immunofluorescence were employed to determine the expression and distribution of TAK1 in the brain cortex of a perinatal HI rat model. In addition, the specific inhibitor of TAK1, NG25 was administered via intracerebroventricular injection, prior to insult of the neonatal rat brains, for neuroprotection...
November 10, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29138801/vitamin-d-receptor-activation-influences-the-erk-pathway-and-protects-against-neurological-deficits-and-neuronal-death
#11
Jie Yuan, Xin Guo, Zhengang Liu, Xiuqin Zhao, Yan Feng, Sixin Song, Changmeng Cui, Pei Jiang
Previous studies have demonstrated that global cerebral ischemia (GCI) causes neurological deficits and neuronal cell apoptosis. Calcitriol, a biologically active metabolite of vitamin D, exerts its endocrinological influence via nuclear vitamin D receptor. It is being assessed as an emerging therapeutic strategy in models of various medical conditions, including acute brain injury. The purpose of the present study was to investigate the neuroprotective effects of calcitriol on GCI and further refine the potential underlying mechanisms...
November 9, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29136024/severe-oxidative-stress-in-an-acute-inflammatory-demyelinating-model-in-the-rhesus-monkey
#12
Jordon Dunham, Reinofke van de Vis, Jan Bauer, Jacqueline Wubben, Nikki van Driel, Jon D Laman, Bert A 't Hart, Yolanda S Kap
Oxidative stress is increasingly implicated as a co-factor of tissue injury in inflammatory/demyelinating disorders of the central nervous system (CNS), such as multiple sclerosis (MS). While rodent experimental autoimmune encephalomyelitis (EAE) models diverge from human demyelinating disorders with respect to limited oxidative injury, we observed that in a non-human primate (NHP) model for MS, namely EAE in the common marmoset, key pathological features of the disease were recapitulated, including oxidative tissue injury...
2017: PloS One
https://www.readbyqxmd.com/read/29134984/evaluation-of-neuroprotective-effect-of-hibiscus-sabdariffa-linn-aqueous-extract-against-ischaemic-reperfusion-insult-by-bilateral-common-carotid-artery-occlusion-in-adult-male-rats
#13
Olatunde Owoeye, Micheal Oluwatosin Gabriel
Ischaemic brain injury continues to be devastating, causing social, medical and relationship disruption. Oxidativedamage has been reported to be one of the mechanisms for brain damage following ischaemic stroke. The antioxidant activityof Hibiscus sabdariffa L. was investigated for a possible protective effect against ischaemia-induced brain damage in rats.Adult male Wistar rats (n=35) were divided into five groups of 7 rats per group. Group 1 served as control was given tapwater; Group 2: 500 mg/kg daily of Hibiscus sabdariffa L...
June 30, 2017: Nigerian Journal of Physiological Sciences: Official Publication of the Physiological Society of Nigeria
https://www.readbyqxmd.com/read/29134540/acute-connexin43-temporal-and-spatial-expression-in-response-to-ischemic-stroke
#14
Moises Freitas-Andrade, Jennifer She, John Bechberger, Christian C Naus, Wun Chey Sin
Connexin43 (Cx43) gap junctions expressed in astrocytes can significantly impact neuronal survival in stroke. However, little is known regarding Cx43 spatial and temporal expression during the initial stages of brain ischemia. Using immunohistochemistry and Western blot analysis, we examined Cx43 spatial and temporal expression as a function of neuronal injury within the first 24 h after permanent middle cerebral artery occlusion (pMCAO). Western blot analysis showed a significant increase in Cx43 protein expression in the core ischemic area at 2 and 3 h after pMCAO...
November 13, 2017: Journal of Cell Communication and Signaling
https://www.readbyqxmd.com/read/29133706/a-randomized-placebo-controlled-trial-of-progesterone-with-or-without-hypothermia-in-patients-with-acute-severe-traumatic-brain-injury
#15
Sumit Sinha, Amol Raheja, Neha Samson, Keshav Goyal, Sanjeev Bhoi, Arul Selvi, Pushpa Sharma, Bhawani Shankar Sharma
OBJECTIVE: Among newer neuroprotectant modalities, hypothermia and progesterone have shown a beneficial role in preliminary studies enrolling patients with severe traumatic brain injury (sTBI). The primary objective of this study was to evaluate the efficacy of progesterone with or without prophylactic hypothermia in acute sTBI patients. MATERIALS AND METHODS: This is a prospective, outcome assessor, statistician blinded, randomized, and placebo-controlled phase II trial of progesterone with or without hypothermia (factorial design)...
November 2017: Neurology India
https://www.readbyqxmd.com/read/29132229/hyperbaric-oxygen-therapy-in-the-treatment-of-acute-severe-traumatic-brain-injury-a-systematic-review
#16
Samuel Daly, Maxwell Thorpe, Sarah B Rockswold, Molly Hubbard, Thomas A Bergman, Uzma Samadani, Gaylan Rockswold
There has been no major advancement in a quarter of a century for the treatment of acute severe traumatic brain injury (TBI). This review summarizes 40 years of clinical and pre-clinical research on the treatment of acute TBI with hyperbaric oxygen therapy (HBO2) in the context of an impending National Institute of Neurologic Disorders and Stroke (NINDS)-funded, multicenter, randomized, adaptive Phase II clinical trial - the Hyperbaric Oxygen Brain Injury Treatment (HOBIT) trial. Thirty studies (8 clinical and 22 pre-clinical) that administered HBO2 within 30 days of a TBI were identified from PubMed searches...
November 13, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29131369/photobiomodulation-for-traumatic-brain-injury-and-stroke
#17
REVIEW
Michael R Hamblin
There is a notable lack of therapeutic alternatives for what is fast becoming a global epidemic of traumatic brain injury (TBI). Photobiomodulation (PBM) employs red or near-infrared (NIR) light (600-1100nm) to stimulate healing, protect tissue from dying, increase mitochondrial function, improve blood flow, and tissue oxygenation. PBM can also act to reduce swelling, increase antioxidants, decrease inflammation, protect against apoptosis, and modulate microglial activation state. All these mechanisms of action strongly suggest that PBM delivered to the head should be beneficial in cases of both acute and chronic TBI...
November 13, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/29130385/developing-awareness-of-confabulation-through-psychological-formulation-a-case-report-and-first-person-perspective
#18
Jessica Fish, Joseph Forrester
Confabulation, or the unintentional production of false, distorted or displaced memories, is commonly seen in people who have brain injury. However, it is most common in the acute phase, with persistent confabulation being comparatively rare. In this paper, we describe the case of Joe, a 24-year-old man who showed confabulation in the chronic phase of his rehabilitation, three years after traumatic brain injury. We describe our approach to therapy for this confabulation, and in particular how collaborative formulation enabled Joe to understand his confabulation, and then to manage it effectively, using a diary and "detective" procedure to identify whether or not evidence existed to support potentially confabulated memories...
November 12, 2017: Neuropsychological Rehabilitation
https://www.readbyqxmd.com/read/29126888/single-severe-traumatic-brain-injury-produces-progressive-pathology-with-ongoing-contralateral-white-matter-damage-one-year-after-injury
#19
Francesca Pischiutta, Edoardo Micotti, Jennifer R Hay, Ines Marongiu, Eliana Sammali, Daniele Tolomeo, Gloria Vegliante, Nino Stocchetti, Gianluigi Forloni, Maria-Grazia De Simoni, William Stewart, Elisa R Zanier
There is increasing recognition that traumatic brain injury (TBI) may initiate long-term neurodegenerative processes, particularly chronic traumatic encephalopathy. However, insight into the mechanisms transforming an initial biomechanical injury into a neurodegenerative process remain elusive, partly as a consequence of the paucity of informative pre-clinical models. This study shows the functional, whole brain imaging and neuropathological consequences at up to one year survival from single severe TBI by controlled cortical impact in mice...
November 7, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/29126430/lack-of-chronic-neuroinflammation-in-the-absence-of-focal-hemorrhage-in-a-rat-model-of-low-energy-blast-induced-tbi
#20
Miguel A Gama Sosa, Rita De Gasperi, Georgina S Perez Garcia, Heidi Sosa, Courtney Searcy, Danielle Vargas, Pierce L Janssen, Gissel M Perez, Anna E Tschiffely, William G Janssen, Richard M McCarron, Patrick R Hof, Fatemeh G Haghighi, Stephen T Ahlers, Gregory A Elder
Blast-related traumatic brain injury (TBI) has been a common cause of injury in the recent conflicts in Iraq and Afghanistan. Blast waves can damage blood vessels, neurons, and glial cells within the brain. Acutely, depending on the blast energy, blast wave duration, and number of exposures, blast waves disrupt the blood-brain barrier, triggering microglial activation and neuroinflammation. Recently, there has been much interest in the role that ongoing neuroinflammation may play in the chronic effects of TBI...
November 10, 2017: Acta Neuropathologica Communications
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