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Spinal cord injury

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https://www.readbyqxmd.com/read/28429407/spinal-cord-injury-induces-widespread-chronic-changes-in-cerebral-white-matter
#1
Tero Ilvesmäki, Eerika Koskinen, Antti Brander, Teemu Luoto, Juha Öhman, Hannu Eskola
Traumatic spinal cord injuries (SCIs) lead to axonal damage at the trauma site, as well as disconnections within the central nervous system. While the exact mechanisms of the long-term pathophysiological consequences of SCIs are not fully understood, it is known that neuronal damage and degeneration are not limited to the direct proximity of the trauma. Instead, the effects can be detected even in the cerebrum. We examined SCI-induced chronic brain changes with a case-control design using 32 patients and 70 control subjects...
April 21, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28428749/deep-brain-stimulation-improves-the-symptoms-and-sensory-signs-of-persistent-central-neuropathic-pain-from-spinal-cord-injury-a-case-report
#2
Walter J Jermakowicz, Ian D Hentall, Jonathan R Jagid, Corneliu C Luca, James Adcock, Alberto Martinez-Arizala, Eva Widerström-Noga
Central neuropathic pain (CNP) is a significant problem after spinal cord injury (SCI). Pharmacological and non-pharmacological approaches may reduce the severity, but relief is rarely substantial. While deep brain stimulation (DBS) has been used to treat various chronic pain types, the technique has rarely been used to attenuate CNP after SCI. Here we present the case of a 54-year-old female with incomplete paraplegia who had severe CNP in the lower limbs and buttock areas since her injury 30 years prior. She was treated with bilateral DBS of the midbrain periaqueductal gray (PAG)...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28428213/clinically-feasible-microstructural-mri-to-quantify-cervical-spinal-cord-tissue-injury-using-dti-mt-and-t2-weighted-imaging-assessment-of-normative-data-and-reliability
#3
A R Martin, B De Leener, J Cohen-Adad, D W Cadotte, S Kalsi-Ryan, S F Lange, L Tetreault, A Nouri, A Crawley, D J Mikulis, H Ginsberg, M G Fehlings
BACKGROUND AND PURPOSE: DTI, magnetization transfer, T2*-weighted imaging, and cross-sectional area can quantify aspects of spinal cord microstructure. However, clinical adoption remains elusive due to complex acquisitions, cumbersome analysis, limited reliability, and wide ranges of normal values. We propose a simple multiparametric protocol with automated analysis and report normative data, analysis of confounding variables, and reliability. MATERIALS AND METHODS: Forty healthy subjects underwent T2WI, DTI, magnetization transfer, and T2*WI at 3T in <35 minutes using standard hardware and pulse sequences...
April 20, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28428212/a-novel-mri-biomarker-of-spinal-cord-white-matter-injury-t2-weighted-white-matter-to-gray-matter-signal-intensity-ratio
#4
A R Martin, B De Leener, J Cohen-Adad, D W Cadotte, S Kalsi-Ryan, S F Lange, L Tetreault, A Nouri, A Crawley, D J Mikulis, H Ginsberg, M G Fehlings
BACKGROUND AND PURPOSE: T2*-weighted imaging provides sharp contrast between spinal cord GM and WM, allowing their segmentation and cross-sectional area measurement. Injured WM demonstrates T2*WI hyperintensity but requires normalization for quantitative use. We introduce T2*WI WM/GM signal-intensity ratio and compare it against cross-sectional area, the DTI metric fractional anisotropy, and magnetization transfer ratio in degenerative cervical myelopathy. MATERIALS AND METHODS: Fifty-eight patients with degenerative cervical myelopathy and 40 healthy subjects underwent 3T MR imaging, covering C1-C7...
April 20, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28428091/characterization-of-the-effects-of-l-4-chlorokynurenine-on-nociception-in-rodents
#5
Tony L Yaksh, Robert Schwarcz, H Ralph Snodgrass
Upon systemic administration in rats, the prodrug L-4-chlorokynurenine (4-Cl-KYN) (AV-101) is rapidly absorbed, actively transported across the blood-brain barrier, and converted in astrocytes to 7-chlorokynurenic acid (7-Cl-KYNA), a potent and specific antagonist of the GlyB co-agonist site of the NMDA receptor. We examined the effects of 4-Cl-KYN in several rat models of hyperalgesia and allodynia and determined the concentrations of 4-Cl-KYN and newly produced 7-Cl-KYNA in serum, brain and spinal cord. Adult male rats were given 4-Cl-KYN (56, 167, 500 mg/kg), the NMDA receptor antagonist MK-801 (0...
April 17, 2017: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/28428016/the-role-of-low-level-laser-therapy-on-neuropathic-pain-relief-and-interleukin-6-expression-following-spinal-cord-injury-an-experimental-study
#6
Negin Mojarad, Atousa Janzadeh, Mahmoud Yousefifard, Farinaz Nasirinezhad
INTRODUCTION: The effect of Low Level Laser Therapy (LLLT) as a non-invasive treatment of spinal cord injury (SCI) is still under investigation. Therefore, the present study aimed to evaluate the effectiveness of LLLT on neuropathic pain and interleukin-6 (IL-6) expression following SCI in male rats. METHODS: 46 adult male rats were divided into 5 groups of control, SCI, treatment with methylprednisolone sodium succinate (MPSS), 1-week LLLT and 2-week LLLT. Animals underwent behavioral evaluations for motor behavior, level of allodynia and hyperalgesia every week...
April 17, 2017: Journal of Chemical Neuroanatomy
https://www.readbyqxmd.com/read/28426867/stem-cell-transplantation-helps-alleviate-spinal-cord-injury-sequelae-in-mice
#7
(no author information available yet)
No abstract text is available yet for this article.
March 1, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28426550/neuropathic-pain-after-chronic-nerve-constriction-may-not-correlate-with-chloride-dysregulation-in-mouse-trigeminal-nucleus-caudalis-neurons
#8
Alberto Castro, Ying Li, Charles Raver, Ramesh Chandra, Radi Masri, Mary Kay Lobo, Asaf Keller
Changes in chloride reversal potential in rat spinal cord neurons have previously been associated with persistent pain in nerve injury and inflammation models. These changes correlate with a decrease in the expression of the potassium% chloride transporter, KCC2, and with increases in neuronal excitability. Here, we test the hypothesis that similar changes occur in mice with neuropathic pain induced by chronic constriction injury of the trigeminal infraorbital nerve (CCI¬-ION). This model allows us to distinguish an acute pain phase (3-¬5 days after injury) from a persistent pain phase (12¬-14 days after CCI-¬ION)...
April 18, 2017: Pain
https://www.readbyqxmd.com/read/28425069/a-prospective-serial-mri-study-following-acute-traumatic-cervical-spinal-cord-injury
#9
Joost P H J Rutges, Brian K Kwon, Manraj Heran, Tamir Ailon, John T Street, Marcel F Dvorak
PURPOSE: In acute traumatic cervical spinal cord injury (SCI) patients, we sought to characterize how objective MRI measures of injury change during the first 3 week post-injury. METHODS: Six MRI scans each were planned in 19 cervical SCI patients within the first 3 week post-injury. Length of cord edema, maximum spinal cord compression, maximum canal compromise, and presence and length of hematoma were measured. RESULTS: Length of spinal cord edema increased in the first 48 h after SCI, followed by a gradual decrease in the 3 weeks after injury...
April 19, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28423963/patient-perceptions-of-environmental-control-units-experiences-of-veterans-with-spinal-cord-injuries-and-disorders-receiving-inpatient-va-healthcare
#10
Bella Etingen, Rachael N Martinez, Marissa A Vallette, Ryan Dendinger, Balmatee Bidassie, Scott Miskevics, Hira T Khan, Huberta T Cozart, Sara M Locatelli, Frances M Weaver
PURPOSE: To assess patients' perceptions of environmental control units (ECUs) at Veterans Affairs Spinal Cord Injury Centers. MATERIALS AND METHODS: A brief questionnaire was conducted with patients in real-time while they were hospitalised ("on-the-spot questionnaire"); a survey was mailed to patients who had recently been discharged from a hospital stay ("discharge survey"). Data were analysed using descriptive statistics. RESULTS: Seventy on-the-spot questionnaires and 80 discharge surveys were collected...
April 19, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/28422895/diffusion-tensor-tractography-for-detection-of-concomitant-traumatic-brain-injury-in-patients-with-traumatic-spinal-cord-injury
#11
Sung Ho Jang, Sang Ho Ahn, Yun Woo Cho, Ji Woon Lim, Ik Tae Cho
OBJECTIVES: We investigated concomitant traumatic brain injury in patients with traumatic spinal cord injury (TSCI) who had head trauma history, using diffusion tensor tractography (DTT). DESIGN: Retrospective survey. PARTICIPANTS: We recruited 14 consecutive patients with TSCI and coexisting head trauma history at the time of TSCI and 30 control subjects. METHODS: The corticospinal tract (CST), corticoreticulospinal tract (CRT), cingulum, and fornix were reconstructed using DTT, and DTT parameters (fractional anisotropy and fiber volume) and configuration were estimated...
January 18, 2017: Journal of Head Trauma Rehabilitation
https://www.readbyqxmd.com/read/28421532/matrix-metalloproteinase-8-inhibition-prevents-disruption-of-blood-spinal-cord-barrier-and-attenuates-inflammation-in-rat-model-of-spinal-cord-injury
#12
Hemant Kumar, Min-Jae Jo, Hyemin Choi, Manjunatha S Muttigi, Seil Shon, Byung-Joo Kim, Soo-Hong Lee, In-Bo Han
After spinal cord injury (SCI), tight junction (TJ) protein degradation increases permeability and disrupts the blood-spinal cord barrier (BSCB). The BSCB is primarily formed of endothelial cell, which forms a specialized tight seal due to the presence of TJs. BSCB disruption after SCI allows neutrophil infiltration. Matrix metalloproteinase (MMP)-8 is believed to be mainly expressed by neutrophils and is quickly released upon neutrophil activation. Here, we determined whether MMP-8 is involved in the TJ protein degradation in endothelial cells and also determined its role in the neuroinflammation after SCI...
April 18, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28421147/electrophysiological-morphological-and-ultrastructural-features-of-the-injured-spinal-cord-tissue-after-transplantation-of-human-umbilical-cord-blood-mononuclear-cells-genetically-modified-with-the-vegf-and-gdnf-genes
#13
Y O Mukhamedshina, Z E Gilazieva, S S Arkhipova, L R Galieva, E E Garanina, A A Shulman, G G Yafarova, Y A Chelyshev, N V Shamsutdinova, A A Rizvanov
In this study, we examined the efficacy of human umbilical cord blood mononuclear cells (hUCB-MCs), genetically modified with the VEGF and GDNF genes using adenoviral vectors, on posttraumatic regeneration after transplantation into the site of spinal cord injury (SCI) in rats. Thirty days after SCI, followed by transplantation of nontransduced hUCB-MCs, we observed an improvement in H (latency period, LP) and M(Amax) waves, compared to the group without therapy after SCI. For genetically modified hUCB-MCs, there was improvement in Amax of M wave and LP of both the M and H waves...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/28420964/identification-of-the-spinal-expression-profile-of-non-coding-rnas-involved-in-neuropathic-pain-following-spared-nerve-injury-by-sequence-analysis
#14
Jun Zhou, Qingming Xiong, Hongtao Chen, Chengxiang Yang, Youling Fan
Neuropathic pain (NP) is caused by damage to the nervous system, resulting in aberrant pain, which is associated with gene expression changes in the sensory pathway. However, the molecular mechanisms are not fully understood. A non-coding Ribose Nucleic Acid (ncRNA) is an RNA molecule that is not translated into a protein. NcRNAs are involved in many cellular processes, and mutations or imbalances of the repertoire within the body can cause a variety of diseases. Although ncRNAs have recently been shown to play a role in NP pathogenesis, the specific effects of ncRNAs in NP remain largely unknown...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28420963/rna-seq-analysis-of-microglia-reveals-time-dependent-activation-of-specific-genetic-programs-following-spinal-cord-injury
#15
Harun N Noristani, Yannick N Gerber, Jean-Charles Sabourin, Marine Le Corre, Nicolas Lonjon, Nadine Mestre-Frances, Hélène E Hirbec, Florence E Perrin
Neurons have inherent competence to regrow following injury, although not spontaneously. Spinal cord injury (SCI) induces a pronounced neuroinflammation driven by resident microglia and infiltrating peripheral macrophages. Microglia are the first reactive glial population after SCI and participate in recruitment of monocyte-derived macrophages to the lesion site. Both positive and negative influence of microglia and macrophages on axonal regeneration had been reported after SCI, raising the issue whether their response depends on time post-lesion or different lesion severity...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28420954/multiple-kernel-based-region-importance-learning-for-neural-classification-of-gait-states-from-eeg-signals
#16
Yuhang Zhang, Saurabh Prasad, Atilla Kilicarslan, Jose L Contreras-Vidal
With the development of Brain Machine Interface (BMI) systems, people with motor disabilities are able to control external devices to help them restore movement abilities. Longitudinal validation of these systems is critical not only to assess long-term performance reliability but also to investigate adaptations in electrocortical patterns due to learning to use the BMI system. In this paper, we decode the patterns of user's intended gait states (e.g., stop, walk, turn left, and turn right) from scalp electroencephalography (EEG) signals and simultaneously learn the relative importance of different brain areas by using the multiple kernel learning (MKL) algorithm...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28418395/an-analysis-of-ideal-and-actual-time-to-surgery-after-traumatic-spinal-cord-injury-in-canada
#17
R A Glennie, C S Bailey, E C Tsai, V K Noonan, C S Rivers, D R Fourney, H Ahn, B K Kwon, J Paquet, B Drew, M G Fehlings, N Attabib, S D Christie, J Finkelstein, R J Hurlbert, S Parent, M F Dvorak
STUDY DESIGN: Retrospective analysis of a prospective registry and surgeon survey. OBJECTIVES: To identify surgeon opinion on ideal practice regarding the timing of decompression/stabilization for spinal cord injury and actual practice. Discrepancies in surgical timing and barriers to ideal timing of surgery were explored. SETTING: Canada. METHODS: Patients from the Rick Hansen Spinal Cord Registry (RHSCIR, 2004-2014) were reviewed to determine actual timing of surgical management...
April 18, 2017: Spinal Cord
https://www.readbyqxmd.com/read/28417673/research-progress-from-the-sci-model-systems-scims-an-interactive-discussion-on-future-directions
#18
Michael L Boninger, Edelle C Field-Fote, Steven C Kirshblum, Daniel P Lammertse, Trevor A Dyson-Hudson, Lesley Hudson, Allen W Heinemann
CONTEXT/OBJECTIVE: To describe current and future directions in spinal cord injury (SCI) research. DESIGN: The SCI Model Systems (SCIMS) programs funded by the National Institute on Disability, Independent Living, and Rehabilitation Research (NIDILRR) during the 2011 to 2016 cycle provided abstracts describing findings from current research projects. Discussion among session participants generated ideas for research opportunities. SETTING/PARTICIPANTS: Pre-conference workshop before the 2016 American Spinal Injury Association (ASIA) annual meeting...
April 18, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/28417262/melatonin-inhibits-neural-cell-apoptosis-and-promotes-locomotor-recovery-via-activation-of-the-wnt-%C3%AE-catenin-signaling-pathway-after-spinal-cord-injury
#19
Zhaoliang Shen, Zipeng Zhou, Shuang Gao, Yue Guo, Kai Gao, Haoyu Wang, Xiaoqian Dang
The spinal cord is highly sensitive to spinal cord injury (SCI) by external mechanical damage, resulting in irreversible neurological damage. Activation of the Wnt/β-catenin signaling pathway can effectively reduce apoptosis and protect against SCI. Melatonin, an indoleamine originally isolated from bovine pineal tissue, exerts neuroprotective effects after SCI through activation of the Wnt/β-catenin signaling pathway. In this study, we demonstrated that melatonin exhibited neuroprotective effects on neuronal apoptosis and supported functional recovery in a rat SCI model by activating the Wnt/β-catenin signaling pathway...
April 18, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28416148/alterations-in-autonomic-cerebrovascular-control-after-spinal-cord-injury
#20
Dong-Il Kim, Can Ozan Tan
Among chronic cardiovascular and metabolic sequelae of spinal cord injury (SCI) is an up-to four-fold increase in the risk of ischemic and hemorrhagic stroke, suggesting that individuals with SCI cannot maintain stable cerebral perfusion. In able-bodied individuals, the cerebral vasculature is able to regulate cerebral perfusion in response to swings in arterial pressure (cerebral autoregulation), blood gases (cerebral vasoreactivity), and neural metabolic demand (neurovascular coupling). This ability depends, at least partly, on intact autonomic function, but high thoracic and cervical spinal cord injuries result in disruption of sympathetic and parasympathetic cerebrovascular control...
April 4, 2017: Autonomic Neuroscience: Basic & Clinical
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