Abstract:
:Mild traumatic brain injury (mTBI) contributes to development of affective disorders, including post-traumatic stress disorder (PTSD). Psychiatric symptoms typically emerge in a tardive fashion post-TBI, with negative effects on recovery. Patients with PTSD, as well as rodent models of PTSD, demonstrate structural and functional changes in brain regions mediating fear learning, including prefrontal cortex (PFC), amygdala (AMYG), and hippocampus (HC). These changes may reflect loss of top-down control by which PFC normally exhibits inhibitory influence over AMYG reactivity to fearful stimuli, with HC contribution. Considering the susceptibility of these regions to injury, we examined fear conditioning (FC) in the delayed post-injury period, using a mouse model of mTBI. Mice with mTBI displayed enhanced acquisition and delayed extinction of FC. Using proton magnetic resonance spectroscopy ex vivo, we examined PFC, AMYG, and HC levels of gamma-aminobutyric acid (GABA) and glutamate as surrogate measures of inhibitory and excitatory neurotransmission, respectively. Eight days post-injury, GABA was increased in PFC, with no significant changes in AMYG. In animals receiving FC and mTBI, glutamate trended toward an increase and the GABA/glutamate ratio decreased in ventral HC at 25 days post-injury, whereas GABA decreased and GABA/glutamate decreased in dorsal HC. These neurochemical changes are consistent with early TBI-induced PFC hypoactivation facilitating the fear learning circuit and exacerbating behavioral fear responses. The latent emergence of overall increased excitatory tone in the HC, despite distinct plasticity in dorsal and ventral HC fields, may be associated with disordered memory function, manifested as incomplete extinction and enhanced FC recall.
journal_name
J Neurotraumajournal_title
Journal of neurotraumaauthors
Schneider BL,Ghoddoussi F,Charlton JL,Kohler RJ,Galloway MP,Perrine SA,Conti ACdoi
10.1089/neu.2015.4190subject
Has Abstractpub_date
2016-09-01 00:00:00pages
1614-24issue
17eissn
0897-7151issn
1557-9042journal_volume
33pub_type
杂志文章abstract::It has been demonstrated that ethanol exerts dose-dependent effects, both beneficial and detrimental, on the outcome of traumatic brain injury (TBI). Recently, it has been reported that co-administration of caffeine (10 mg/kg) and a low amount of alcohol (0.65 g/kg; caffeinol) reduces cortical infarct volume up to 80%...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2004.21.1573
更新日期:2004-11-01 00:00:00
abstract::Prognostic models that were developed by the International Mission on Prognosis and Analysis of Clinical Trials in Traumatic Brain Injury (IMPACT) study group and the Corticosteroid Randomization After Signification Head injury (CRASH) collaborators are the most commonly used prognostic models for outcome after trauma...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2015.4182
更新日期:2016-09-01 00:00:00
abstract::Recommendations on treatment of patients with head injury were recently proposed by the National Institute for Clinical Excellence (NICE). We tested the clinical performance of NICE variables versus the proposal of the Neurotraumatology Committee of the World Federation of Neurosurgical Societies (NCWFNS). Over a 5-ye...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2005.22.1419
更新日期:2005-12-01 00:00:00
abstract::Determining the priorities of individuals with spinal cord injury (SCI) can assist in choosing research priorities that will ultimately improve their quality of life. This systematic review examined studies that directly surveyed people with SCI to ascertain their health priorities and life domains of importance. Twen...
journal_title:Journal of neurotrauma
pub_type: 杂志文章,评审
doi:10.1089/neu.2011.2226
更新日期:2012-05-20 00:00:00
abstract::After experimental traumatic brain injury (TBI), calcineurin is upregulated; blocking calcineurin is associated with improved outcomes. In humans, variation in the calcineurin A-gamma gene (PPP3CC) has been associated with neuropsychiatric disorders, though any role in TBI recovery remains unknown. This study examines...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2015.4343
更新日期:2017-01-01 00:00:00
abstract::The rat hippocampus is hypersensitive to secondary cerebral ischemia after mild traumatic brain injury (TBI). An unconfirmed assumption in previous studies of mild TBI followed by forebrain ischemia has been that antecedent TBI did not alter cerebral blood flow (CBF) dynamics in response to secondary ischemia. Using l...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.1998.15.615
更新日期:1998-08-01 00:00:00
abstract::A penetrating traumatic brain injury (pTBI) occurs when an object impacts the head with sufficient force to penetrate the skin, skull, and meninges, and inflict injury directly to the brain parenchyma. This type of injury has been notoriously difficult to model in small laboratory animals such as rats or mice. To this...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2011.2182
更新日期:2012-04-10 00:00:00
abstract::Moderate to severe traumatic brain injury (TBI) in humans and rats induces measurable metabolic changes, including a sustained depression in cerebral glucose uptake. However, the effect of a mild TBI on brain glucose uptake is unclear, particularly in rodent models. This study aimed to determine the glucose uptake pat...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2013.2928
更新日期:2013-12-01 00:00:00
abstract::Surviving motoneurons undergo dendritic atrophy after spinal cord injury (SCI), suggesting an important therapeutic target for neuroprotective strategies to improve recovery of function after SCI. Our previous studies showed that phospholipase A2 (PLA2) may play an important role in the pathogenesis of SCI. In the pre...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2014.3690
更新日期:2014-11-11 00:00:00
abstract::Oxidative energy metabolism is depressed after mild/moderate traumatic brain injury (TBI) during early development, accompanied by behavioral debilitation and secondary neuronal death. A TBI metabolome analysis revealed broad effects with a striking impact on energy metabolism. Our studies on mitochondrial modulators ...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2018.6100
更新日期:2019-04-15 00:00:00
abstract::The object of this study was to investigate the relationships of age on neurologic and functional outcome, hospitalization length of stay (LOS), and hospital charges after spinal cord injury (SCI). At 20 medical centers, 2,169 consecutive adult patients with paraplegia SCI were assessed in acute care and inpatient reh...
journal_title:Journal of neurotrauma
pub_type: 杂志文章,多中心研究
doi:10.1089/neu.1999.16.805
更新日期:1999-09-01 00:00:00
abstract::Modulation of the glutamatergic and excitotoxic pathway may attenuate secondary damage following traumatic brain injury by reducing presynaptic glutamate release and blocking sodium channels in their inactivated state. The aim of the present study was to investigate the neuroprotective potential of riluzole in traumat...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2000.17.1171
更新日期:2000-12-01 00:00:00
abstract::Following crush injury to the facial nerve in Syrian hamsters, treatment with androgens enhances axonal regeneration rates and decreases time to recovery. It has been demonstrated in vitro that the ability of androgen to enhance neurite outgrowth in motoneurons is dependent on neuritin-a protein that is involved in th...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2007.0466
更新日期:2008-05-01 00:00:00
abstract::Previous studies have shown that oxygen radical scavengers prevent the reduced cerebral blood flow that occurs following experimental traumatic brain injury. The exact chemical species responsible for the posttraumatic reduction in flow is unknown. We tested whether isoprostanes, which are formed by non-cyclooxygenase...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2000.17.415
更新日期:2000-05-01 00:00:00
abstract::Although the citation index of an article is not a direct measure of its quality or importance, it is a measure of recognition that may suggest its impact on the scientific community. This study was undertaken to examine the characteristics of the top 100 most frequently cited articles (so-called "citation classics") ...
journal_title:Journal of neurotrauma
pub_type: 杂志文章,评审
doi:10.1089/neu.2006.23.156
更新日期:2006-02-01 00:00:00
abstract::Considerable effort and resources have been devoted to preserving life in patients with severe closed traumatic brain injury (TBI). We sought to identify temporal trends in mortality rates of these patients from the late 1800s to the present. We searched the literature for articles on severe TBI, abstracting numbers o...
journal_title:Journal of neurotrauma
pub_type: 历史文章,杂志文章,评审
doi:10.1089/neu.2009.1206
更新日期:2010-07-01 00:00:00
abstract::Fatalities or injuries following motorized and non-motorized vehicle accidents (MNMVA) are reported by police or health care systems. However, limited data exist for spinal injuries. Using an epidemiological database of road accidents occurring in a defined geographic area, we measured the incidence of major spinal tr...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2009.1197
更新日期:2010-06-01 00:00:00
abstract::Pituitary adenylate cyclase activating polypeptide (PACAP) has several different actions in the nervous system. Numerous studies have shown its neuroprotective effects both in vitro and in vivo. Previously, it has been demonstrated that PACAP reduces brain damage in rat models of global and focal cerebral ischemia. Ba...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2006.23.686
更新日期:2006-05-01 00:00:00
abstract::This report is a feasibility study on the utility of gel-free proteomics in identifying peripheral biomarkers of brain injury. The study was performed in six pediatric patients admitted to the intensive care unit for severe traumatic brain injury (TBI). Serum samples collected at admission (less than 8 h after injury)...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2006.0079
更新日期:2007-01-01 00:00:00
abstract::A significant outflow of neurotransmitters and metabolites with associated enhanced cortical excitation occurs after concussive head trauma. Cellular changes in the acute post-injury period cannot be observed directly in humans, and as such, require indirect evidence from systems sufficiently sensitive to central neur...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2015.3968
更新日期:2016-05-01 00:00:00
abstract::Post-traumatic amnesia (PTA) is an acute characteristic of traumatic brain injury (TBI) and the duration of PTA is commonly used to estimate the severity of brain injury. In the context of mild traumatic brain injury (MTBI), PTA is an essential part of the routine clinical assessment. Macroscopic lesions in temporal l...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2013.2978
更新日期:2014-07-01 00:00:00
abstract::Contusion-type cervical spinal cord injury (SCI) is one of the most common forms of SCI observed in patients. In particular, injuries targeting the C3-C5 region affect the pool of phrenic motor neurons (PhMNs) that innervates the diaphragm, resulting in significant and often chronic respiratory dysfunction. Using a pr...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2012.2728
更新日期:2013-06-15 00:00:00
abstract::The Basso, Bresnahan and Beattie (BBB) locomotor scale has not been tested to evaluate functional consequences of peripheral nerve lesions. Alternative methods to evaluate animal functional recovery after sciatic nerve injury are desirable. Male Wistar rats had a right sciatic nerve segment exposed and were divided in...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/089771504774129955
更新日期:2004-05-01 00:00:00
abstract::Many patients with mild traumatic brain injury (MTBI) concurrently sustain extracranial injuries; however, little is known about the impact of these additional injuries on outcome. We assessed the impact of additional injuries on the severity of postconcussional symptoms (PCS) and functional outcome 6 months post-inju...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2006.23.1561
更新日期:2006-10-01 00:00:00
abstract::Spinal cord injury (SCI) causes neurodegeneration, impairs locomotor function, and impacts the quality of life particularly in those individuals in whom neuropathic pain develops. Whether the time course of neurodegeneration, locomotor impairment, or neuropathic pain varies with sex, however, remains understudied. The...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2019.6931
更新日期:2020-09-15 00:00:00
abstract::The optimum spinal cord perfusion pressure (SCPP) after traumatic spinal cord injury (TSCI) is unknown. Here, we describe techniques to compute and display the optimum SCPP in real time. We recruited adults within 72 h of severe TSCI (American Spinal Injuries Association [ASIA] grades A-C). A pressure probe and a micr...
journal_title:Journal of neurotrauma
pub_type: 临床试验,杂志文章
doi:10.1089/neu.2017.4982
更新日期:2017-11-01 00:00:00
abstract::Reactive oxygen species have been implicated in the pathogenesis of hypoxic-ischemic injury. It has been shown previously that treating an animal with N-acetyl-L-cysteine (NAC), a scavenger of free radicals, significantly minimizes hypoxic-ischemic-induced brain injury in various acute models. Using a subacute swine m...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2010.1325
更新日期:2010-10-01 00:00:00
abstract::The effects of ethanol intoxication on brain injury and cerebral blood flow (CBF) were investigated in a porcine fluid-percussion model of traumatic brain injury (TBI). Immature swine, under halothane anesthesia (1%), had a TBI delivered with a fluid-percussion device. The experimental group (n = 10) received ethanol ...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.1993.10.275
更新日期:1993-10-01 00:00:00
abstract::Acute subdural hematomas (ASDHs) are highly morbid and increasingly common. Hematoma expansion is a potentially fatal complication, and few studies have examined whether factors associated with hematoma expansion vary over time. To answer this, we performed a case-control study in a cohort of initially conservatively ...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2020.7192
更新日期:2020-12-14 00:00:00
abstract::Stretching of cultured neurons has been used to model diffuse axonal injury associated with brain trauma. N-Methyl-D-aspartate receptor (NMDAR) activation and group I metabotropic glutamate receptors (mGluRs) are implicated in the pathophysiology of such injury. Here we detail the effects of culture condition and mGlu...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/089771503770802907
更新日期:2003-11-01 00:00:00