Abstract:
:Autonomic dysreflexia (AD) is a potentially life-threatening syndrome in individuals with spinal cord injury (SCI) above the T6 spinal level that is characterized by episodic hypertension in response to noxious stimuli below the lesion. Maladaptive intraspinal plasticity is thought to contribute to the temporal development of AD, and experimental approaches that reduce such plasticity mitigate the severity of AD. The mammalian target of rapamycin (mTOR) has gained interest as a mediator of plasticity, regeneration, and nociceptor hypersensitivity in the injured spinal cord. Based on our preliminary data that prolonged rapamycin (RAP) treatment markedly reduces mTOR activity in the cord weeks after high-thoracic (T4) spinal transection, we sought to determine whether RAP could modulate AD development by impeding intraspinal plasticity. Naïve and injured rats were administered RAP or vehicle every other day, beginning immediately after injury for four weeks, and hemodynamic monitoring was conducted to analyze the frequency of spontaneously occurring AD, as well as the severity of colorectal distention (CRD) induced AD. Results showed that after SCI, RAP significantly exacerbated sustained body weight loss and caused a marked elevation in resting blood pressure, with average daily blood pressure rising above even normal naïve levels within one week after injury. Moreover, RAP significantly increased the frequency of daily spontaneous AD and increased the absolute blood pressure induced by CRD at three weeks post-injury. These dynamic cardiovascular effects were not, however, correlated with changes in the density of nociceptive c-fibers or c-Fos+ neurons throughout the spinal cord, indicating that intraspinal plasticity associated with AD was not altered by treatment. These findings caution against the use of RAP as a therapeutic intervention for SCI because it evokes toxic weight loss and exacerbates cardiovascular dysfunction perhaps mediated by increased peripheral nociceptor sensitivity and/or vascular resistance.
journal_name
J Neurotraumajournal_title
Journal of neurotraumaauthors
Eldahan KC,Cox DH,Gollihue JL,Patel SP,Rabchevsky AGdoi
10.1089/neu.2017.5184subject
Has Abstractpub_date
2018-03-15 00:00:00pages
842-853issue
6eissn
0897-7151issn
1557-9042journal_volume
35pub_type
杂志文章abstract::Spinal cord injury (SCI) is a devastating condition affecting young, healthy individuals worldwide. Existing agents have inadequate therapeutic efficacy, and some are associated with side effects. Our objective is to summarize and critically assess the neurological recovery and antioxidant effects of curcumin for trea...
journal_title:Journal of neurotrauma
pub_type: 杂志文章,meta分析,评审
doi:10.1089/neu.2014.3520
更新日期:2015-03-15 00:00:00
abstract::Fluid percussion (FP) brain injury causes spatial memory dysfunction in rats regardless of injury location (midline vs. lateral). Standard histological analysis of the injured brains shows hippocampal neuronal loss after lateral, but not midline FP injury. We have used the optical volume fractionator (OVF) stereologic...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/089771503770195786
更新日期:2003-10-01 00:00:00
abstract::Abstract Although several functional magnetic resonance imaging (fMRI) studies have been conducted in human models of mild traumatic brain injury (mTBI), to date no studies have explicitly examined how injury may differentially affect both the positive phase of the hemodynamic response function (HRF) as well as the po...
journal_title:Journal of neurotrauma
pub_type: 杂志文章,随机对照试验
doi:10.1089/neu.2013.3069
更新日期:2014-01-15 00:00:00
abstract::The aim of this systematic review was to critically evaluate the evidence on interventions for depression following traumatic brain injury (TBI) and provide recommendations for clinical practice and future research. We reviewed pharmacological, other biological, psychotherapeutic, and rehabilitation interventions for ...
journal_title:Journal of neurotrauma
pub_type: 杂志文章,评审
doi:10.1089/neu.2009.1091
更新日期:2009-12-01 00:00:00
abstract::We have previously shown that early treatment with fresh frozen plasma (FFP) is neuroprotective in a swine model of hemorrhagic shock (HS) and traumatic brain injury (TBI). However, it remains unknown whether this strategy would be beneficial in a more clinical polytrauma model. Yorkshire swine (42-50 kg) were instrum...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2014.3535
更新日期:2015-03-01 00:00:00
abstract::Athletes who sustain a concussion demonstrate a variety of symptoms and neuropsychological alterations that could be brought on by neurometabolic abnormalities. However, no study has yet investigated these aspects in female athletes using magnetic resonance spectroscopy. The present study investigated the neurometabol...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2013.3083
更新日期:2014-02-15 00:00:00
abstract::Mood disturbances, including depression and anxiety disorders, are common and disabling long-term sequelae of traumatic brain injury (TBI). These psychiatric conditions have generally been considered psychosocial consequences of the trauma, but neurobiological alterations and causes have also been implicated. Using a ...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2008.0641
更新日期:2008-11-01 00:00:00
abstract::The increase in the volume of a traumatic intracerebral hemorrhage (TICH) is a widely studied phenomenon that has a direct impact on the prognosis of patients. The objective of this study was to identify the risk factors associated with the progression of TICH. We retrospectively analyzed the records of 1970 adult pat...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2014.3808
更新日期:2015-08-15 00:00:00
abstract::Hearing impairment can be one of the more subtle deficits seen after closed head injury (CHI), and it may not be diagnosed until late in the recovery phase if at all. Most studies have assessed patients immediately after CHI. Repeated assessments at regular intervals were not performed in the majority of studies done ...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2009.0957
更新日期:2010-02-01 00:00:00
abstract::Traumatic brain injury (TBI) has been identified as a risk factor for Alzheimer's disease (AD). However, how such neural damage contributes to AD pathology remains unclear; specifically, the relationship between the timing of a TBI relative to aging and the onset of AD pathology is not known. In this study, we have ex...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2018.5982
更新日期:2019-06-01 00:00:00
abstract::The present study evaluated the effects of two novel N-methyl-D-aspartate (NMDA) receptor blockers and ifenprodil derivatives, CP-101,606 and CP-101,581, and their racemic mixture CP-98,113, on spatial memory and regional cerebral edema following experimental fluid-percussion (FP) brain injury in the rat (n = 66). Fif...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.1997.14.211
更新日期:1997-04-01 00:00:00
abstract::Mild traumatic brain injury (mTBI) accounts for the vast majority of all pediatric TBI. An important minority of children who have suffered an mTBI have enduring cognitive and emotional symptoms. However, the mechanisms of chronic symptoms in children with pediatric mTBI are not fully understood. This is in part due t...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2019.6417
更新日期:2020-04-01 00:00:00
abstract::Wars in Afghanistan and Iraq have resulted in thousands of military personnel suffering traumatic brain injury (TBI), including closed-head injuries. Of interest is whether these individuals and other TBI survivors are at increased risk for substance use disorder (SUD). While it has been well established that drug or ...
journal_title:Journal of neurotrauma
pub_type: 杂志文章,评审
doi:10.1089/neu.2008.0849
更新日期:2009-07-01 00:00:00
abstract::This prospective longitudinal study compares the ability of conventional and diffusion tensor imaging (DTI) parameters made at the cervical spinal cord injury (CSCI) site to predict long-term neurological and functional outcomes. Twenty patients with CSCI, with follow-up at 6 or 12 months, and 15 control volunteers we...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2019.6394
更新日期:2020-02-01 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::The purpose of this study was to compare spontaneous functional recovery after different spinal motor tract lesions in the rat spinal cord using three methods of analysis, the BBB, the rope test, and the CatWalk. We transected the dorsal corticospinal tract (CSTx) or the rubrospinal tract (RSTx) or the complete dorsal...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2006.23.18
更新日期:2006-01-01 00:00:00
abstract::Chronic pain and dysesthesias are debilitating conditions that can arise following spinal cord injury (SCI). Research studies frequently employ rodent models of SCI to better understand the underlying mechanisms and develop better treatments for these phenomena. While evoked withdrawal tests can assess hypersensitivit...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2009.1182
更新日期:2010-05-01 00:00:00
abstract::Although experience suggests a shift in the epidemiology of spinal cord injury (SCI) toward an older demographic, population studies are lacking. We aimed to evaluate (1) how the epidemiology and age profile of SCI have changed over time, and (2) how increased age impacts health outcomes up to 15 years post-injury. A ...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2020.6985
更新日期:2020-08-01 00:00:00
abstract::Injury to the spinal cord not only disrupts the functioning of spinal circuits at the site of the impact, but also limits sensorimotor function caudal to the level of the lesion. Ratings of gross locomotor skill are generally used to quantify locomotor recovery following spinal cord injury (SCI). The purpose of this s...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2006.23.1632
更新日期:2006-11-01 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::We have investigated time course and characteristics of retinal ganglion cell (RGC) death after partial optic nerve injury. In situ end labeling of DNA fragments with the terminal deoxynucleotidyl transferase (TdT)-mediated deoxyuridine (dUTP)-biotin nick end labeling (TUNEL) method revealed the presence of apoptotic ...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.1999.16.153
更新日期:1999-02-01 00:00:00
abstract::The present study evaluated the survival and integration of human postmitotic neurons (hNT) following transplantation into the traumatically injured rodent brain. Anesthetized male Sprague-Dawley rats (n = 47) were subjected to lateral fluid percussion brain injury of moderate severity (2.4-2.6 atm). Sham animals (n =...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.1999.16.403
更新日期:1999-05-01 00:00:00
abstract::Neuropathic pain develops in 40-70% of spinal cord injury (SCI) patients and markedly compromises quality of life. We examined plasma from SCI patients for autoantibodies to glial fibrillary acidic protein (GFAP) and collapsin response mediator protein-2 (CRMP2) and evaluated their relationship to the development of n...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2018.5675
更新日期:2018-11-01 00:00:00
abstract::Non-human primate (NHP) models of spinal cord injury better reflect human injury and provide a better foundation to evaluate potential treatments and functional outcomes. We combined finite element (FE) and surrogate models with impact data derived from in vivo experiments to define the impact mechanics needed to gene...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2015.3974
更新日期:2016-06-15 00:00:00
abstract::The role of endothelin (ET) in the pathophysiology of secondary neural damage after experimental spinal cord injury (SCI) was examined in a rat model of weight-drop contusion injury. Initial studies demonstrated a significant increase in spinal ET concentrations in a 7.5-mm segment of tissue (centered at the impact si...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.1996.13.93
更新日期:1996-02-01 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
abstract::Older adults tend to have poorer outcomes compared to younger adults following moderate-to-severe traumatic brain injury (TBI). Currently, there is a need for research focusing on how elderly TBI has changed as the U.S. population shifts. This study provides a statewide account of moderate-to-severe TBI in regard to i...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2011.2197
更新日期:2012-05-01 00:00:00
abstract::Following a controlled, severe contusion lesion to the lower thoracic spinal cord in adult rats, we found that apoptosis occurred in cells located in both gray and white matter. This suggested that both nonneuronal cells, including astrocytes, oligodendroglia and microglia, as well as neurons, might participate in pro...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.1998.15.459
更新日期:1998-07-01 00:00:00
abstract::Depression is associated with poorer recovery after traumatic brain injury (TBI), yet awareness of depression risk post-TBI among providers and patients is low. The aim of this study was to estimate risk of depression post-TBI among adults 18 years of age and older and to identify risk factors associated with developi...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2017.5608
更新日期:2019-01-15 00:00:00
abstract::Sports-related concussion is a major public health problem in the United States and yet its biomechanical mechanisms remain unclear. In vitro studies demonstrate axonal elongation as a potential injury mechanism; however, current response-based injury predictors (e.g., maximum principal strain, ε(ep)) typically do not...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2013.3268
更新日期:2015-04-01 00:00:00