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Spinal nerve injury

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https://www.readbyqxmd.com/read/28993994/efficacy-and-factors-determining-the-outcome-of-dorsal-root-entry-zone-lesioning-procedure-drezotomy-in-the-treatment-of-intractable-pain-syndrome
#1
Nontaphon Piyawattanametha, Bunpot Sitthinamsuwan, Pramote Euasobhon, Nantthasorn Zinboonyahgoon, Pranee Rushatamukayanunt, Sarun Nunta-Aree
BACKGROUND: Chronic pain is a disabling condition that adversely affects patient quality of life. The dorsal root entry zone lesioning procedure (DREZotomy) is a modality used to treat intractable pain caused by insults to neural structures. This study aimed to investigate the efficacy of and the factors that determine the outcome of microsurgical DREZotomy (MDT). METHOD: All consecutive patients who underwent MDT for treatment of intractable pain during September 2008 to December 2016 were enrolled...
October 9, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28993250/monoaminergic-descending-pathways-contribute-to-modulation-of-neuropathic-pain-by-increasing-intensity-treadmill-exercise-after-peripheral-nerve-injury
#2
Victor M Lopez-Alvarez, Maria Puigdomenech, Xavier Navarro, Stefano Cobianchi
This study characterizes the impact of increasing-intensity treadmill exercise (iTR) on noradrenergic (NE) and serotonergic (5HT) modulation of neuropathic pain. Following sciatic nerve transection and repair (SNTR) rats developed significant mechanical and thermal hyperalgesia that was partially prevented by iTR performed during the first 2weeks after injury. Marked decrease in the expression of 5HT2A and α1A and β-, but not α2A adrenergic receptors in the spinal cord dorsal horn was associated to SNTR and recovered by iTR, particularly in lamina II...
October 7, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28984755/clinical-and-imaging-features-of-spinal-cord-type-of-neuro-beh%C3%A3-et-disease-a-case-report-and-systematic-review
#3
REVIEW
Hui-Miao Liu, Ci Dong, Yong-Zhi Zhang, Ya-Yun Tian, Hong-Xu Chen, Sai Zhang, Na Li, Ping Gu
RATIONAL: To investigate the clinical and MRI characteristics of spinal cord nerve Behçet's disease. PATIENT CONCERNS: One patient with spinal cord nerve Behçet's disease was admitted to our hospital at October 20, 2015. DIAGNOSE: Spinal cord nerve Behçet's disease. INTERVENTIONS: Retrospective analysis was performed on such case as well as 16 cases of spinal cord nerve Behçet's disease reported in China or abroad...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28984398/the-%C3%AE-lactam-clavulanic-acid-mediates-glutamate-transport-sensitive-pain-relief-in-a-rat-model-of-neuropathic-pain
#4
P J Kristensen, G Gegelashvili, G Munro, A M Heegaard, O J Bjerrum
BACKGROUND: Following nerve injury, down-regulation of astroglial glutamate transporters (GluTs) with subsequent extracellular glutamate accumulation is a key factor contributing to hyperexcitability within the spinal dorsal horn. Some β-lactam antibiotics can up-regulate GluTs, one of which, ceftriaxone, displays analgesic effects in rodent chronic pain models. METHODS: Here, the antinociceptive actions of another β-lactam clavulanic acid, which possesses negligible antibiotic activity, were compared with ceftriaxone in rats with chronic constriction injury (CCI)-induced neuropathic pain...
October 6, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28982707/post-injury-induction-of-activated-erbb2-selectively-hyperactivates-denervated-schwann-cells-and-promotes-robust-dorsal-root-axon-regeneration
#5
Seung Baek Han, Hyukmin Kim, Hyunkyoung Lee, Matthew Grove, George M Smith, Young-Jin Son
Following nerve injury, denervated Schwann cells (SCs) convert to repair SCs, which enable regeneration of peripheral axons. However, the repair capacity of SCs and the regenerative capacity of peripheral axons are limited. In the present studies we examined a potential therapeutic strategy to enhance the repair capacity of SCs, and tested its efficacy in enhancing regeneration of dorsal root (DR) axons, whose regenerative capacity is particularly weak. We used male and female mice of a doxycycline-inducible transgenic line to induce expression of constitutively active ErbB2 (caErbB2) selectively in SCs after DR crush or transection...
October 5, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28980210/photobiomodulation-therapy-improves-acute-inflammatory-response-in-mice-the-role-of-cannabinoid-receptors-atp-sensitive-k-channel-p38-mapk-signalling-pathway
#6
Laís M S Neves, Elaine C D Gonçalves, Juliana Cavalli, Graziela Vieira, Larissa R Laurindo, Róli R Simões, Igor S Coelho, Adair R S Santos, Alexandre M Marcolino, Maíra Cola, Rafael C Dutra
Although photobiomodulation therapy (PBM) has been applied clinically for the treatment of pain and inflammation, wound healing, sports and soft tissue injuries, as well as to repair injured spinal cords and peripheral nerves, it remains unclear which molecular substrates (receptor) are implicated in the cellular mechanisms of PBM. Here, we reported that PBM (660 nm, 30 mW, 0.06 cm(2), 50 J/cm(2), plantar irradiation) significantly inhibited carrageenan-induced paw oedema, but not noxious thermal response, through positive modulation to both CB1 and CB2 cannabinoid receptors...
October 4, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28973941/granulocyte-colony-stimulating-factor-g-csf-signaling-in-spinal-microglia-drives-visceral-sensitization-following-colitis
#7
Lilian Basso, Tamia K Lapointe, Mircea Iftinca, Candace Marsters, Morley D Hollenberg, Deborah M Kurrasch, Christophe Altier
Pain is a main symptom of inflammatory diseases and often persists beyond clinical remission. Although we have a good understanding of the mechanisms of sensitization at the periphery during inflammation, little is known about the mediators that drive central sensitization. Recent reports have identified hematopoietic colony-stimulating factors as important regulators of tumor- and nerve injury-associated pain. Using a mouse model of colitis, we identify the proinflammatory cytokine granulocyte-colony-stimulating factor (G-CSF or Csf-3) as a key mediator of visceral sensitization...
October 2, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28967557/combining-constitutively-active-rheb-expression-and-chondroitinase-promotes-functional-axonal-regeneration-after-cervical-spinal-cord-injury
#8
Di Wu, Michelle C Klaw, Theresa Connors, Nikolai Kholodilov, Robert E Burke, Marie-Pascale Côté, Veronica J Tom
After spinal cord injury (SCI), severed axons in the adult mammalian CNS are unable to mount a robust regenerative response. In addition, the glial scar at the lesion site further restricts the regenerative potential of axons. We hypothesized that a combinatorial approach coincidentally targeting these obstacles would promote axonal regeneration. We combined (1) transplantation of a growth-permissive peripheral nerve graft (PNG) into an incomplete, cervical lesion cavity; (2) transduction of neurons rostral to the SCI site to express constitutively active Rheb (caRheb; a Ras homolog enriched in brain), a GTPase that directly activates the growth-promoting pathway mammalian target of rapamycin (mTOR) via AAV-caRheb injection; and (3) digestion of growth-inhibitory chondroitin sulfate proteoglycans within the glial scar at the distal PNG interface using the bacterial enzyme chondroitinase ABC (ChABC)...
August 19, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28967373/an-overview-of-pathways-encoding-nociception
#9
REVIEW
Sarah A Woller, Kelly A Eddinger, Maripat Corr, Tony L Yaksh
The nervous system detects and interprets a variety of chemical, mechanical, and thermal stimuli. In the face of tissue injury, local inflammatory products perpetuate ongoing activity and sensitisation of the peripheral nerve termini. This ongoing activity evokes a state of robust spinal facilitation mediated by a number of local circuits, the net effect yielding an enhanced message of nociception to higher centres. This messaging typically wanes with the resolution of inflammation or wound healing. However, there are situations in which peripheral and central components of the pain transmission pathway extend and enhance the pain state, leading to a persistent hypersensitivity, e...
September 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28965446/insertion-of-magnetically-controlled-growing-rods-in-a-patient-with-a-diaphragmatic-pacemaker-case-report
#10
Andrew C Vivas, Steven W Hwang, Joshua M Pahys
Phrenic stimulators offer an alternative to standard mechanical ventilation as well as the potential for ventilator independence in select patients with chronic respiratory failure. Young patients (< 10 years old) with high cervical spinal cord injuries often develop paralytic scoliosis due to loss of muscle tone caudal to their spinal cord lesion. Growing rod systems allow for stabilization of spinal deformity while permitting continued growth of the spine and thoracic cavity. Magnetically controlled growing rods (MCGRs) offer the advantage of noninvasive expansion, as opposed to the operative expansion required in traditional growing rod systems...
October 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28963716/the-monoacylglycerol-lipase-inhibitor-kml29-with-gabapentin-synergistically-produces-analgesia-in-mice
#11
Molly S Crowe, Catheryn D Wilson, Emma Leishman, Paul L Prather, Heather B Bradshaw, Matthew L Banks, Steven G Kinsey
BACKGROUND AND PURPOSE: Gabapentin (GBP) is commonly prescribed for nerve pain but may also cause dizziness, sedation, and gait disturbances. Similarly, inhibition of the endogenous cannabinoid enzyme monoacylglycerol lipase (MAGL) has antinociceptive and anti-inflammatory properties, but also induces sedation in mice at high doses. To limit these side effects, the present study investigated the analgesic effects of coadministering a MAGL inhibitor with GBP. EXPERIMENTAL APPROACH: Mice subjected to the chronic constriction injury (CCI) model of neuropathic pain were administered the MAGL inhibitor KML29 (1-40 mg kg(-1) , i...
September 29, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28962628/percutaneous-anterior-c1-2-transarticular-screw-fixation-salvage-of-failed-percutaneous-odontoid-screw-fixation-for-odontoid-fracture
#12
Ai-Min Wu, Hai-Ming Jin, Zhong-Ke Lin, Yong-Long Chi, Xiang-Yang Wang
BACKGROUND: The objective of this study is to investigate the outcomes and safety of using percutaneous anterior C1/2 transarticular screw fixation as a salvage technique for odontoid fracture if percutaneous odontoid screw fixation fails. METHODS: Fifteen in 108 odontoid fracture patients (planned to be treated by percutaneous anterior odontoid screw fixation) were failed to introduce satisfactory odontoid screw trajectory. To salvage this problem, we chose the percutaneous anterior C1/2 transarticular screw fixation technique in treatment of these patients...
September 29, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28960131/blood-perfusion-changes-during-sacral-nerve-root-stimulation-versus-surface-gluteus-electrical-stimulation-on-in-seated-spinal-cord-injury
#13
Liang Qin Liu, Martin Ferguson-Pell
The objective of this article is to examine dynamic changes of ischial blood perfusion during sacral nerve root stimulation against surface functional electrical stimulation (FES). Fourteen adults with suprasacral spinal cord injury (SCI) were recruited. The gluteal maximus was activated by surface FES or stimulating sacral nerve roots by functional magnetic stimulation (FMS) or a sacral anterior root stimulator implant (SARS). Ischial skin index of hemoglobin (IHB) and oxygenation (IOX) was measured.Skin blood perfusion was significantly higher during FMS than the baseline (IHB 1...
September 29, 2017: Assistive Technology: the Official Journal of RESNA
https://www.readbyqxmd.com/read/28954467/afferent-pathway-mediated-effect-of-%C3%AE-1-adrenergic-antagonist-tamsulosin-on-the-neurogenic-bladder-after-spinal-cord-injury
#14
Jin-Hee Han, Sung-Eun Kim, Il-Gyu Ko, Jayoung Kim, Khae Hawn Kim
PURPOSE: The functions of the lower urinary tract (LUT), such as voiding and storing urine, are dependent on complex central neural networks located in the brain, spinal cord, and peripheral ganglia. Thus, the functions of the LUT are susceptible to various neurologic disorders including spinal cord injury (SCI). SCI at the cervical or thoracic levels disrupts voluntary control of voiding and the normal reflex pathways coordinating bladder and sphincter functions. In this context, it is noteworthy that α1-adrenoceptor blockers have been reported to relieve voiding symptoms and storage symptoms in elderly men with benign prostatic hyperplasia (BPH)...
September 2017: International Neurourology Journal
https://www.readbyqxmd.com/read/28952414/src-family-kinases-activation-in-spinal-microglia-contributes-to-central-sensitization-and-chronic-pain-after-lumbar-disc-herniation
#15
Yangliang Huang, Yongyong Li, Xiongxiong Zhong, Yuming Hu, Pan Liu, Yuanshu Zhao, Zhen Deng, Xianguo Liu, Shaoyu Liu, Yi Zhong
Background Lumbar disc herniation is a major cause of radicular pain, but the underlying mechanisms remain largely unknown. Spinal activation of src-family kinases are involved in the development of chronic pain from nerve injury, inflammation, and cancer. In the present study, the role of src-family kinases activation in lumbar disc herniation-induced radicular pain was investigated. Results Lumbar disc herniation was induced by implantation of autologous nucleus pulposus, harvest from tail, in lumbar 4/5 spinal nerve roots of rat...
January 2017: Molecular Pain
https://www.readbyqxmd.com/read/28950736/effects-of-early-nerve-repair-on-experimental-brachial-plexus-injury-in-neonatal-rats
#16
Gráinne Bourke, Aleksandra M McGrath, Mikael Wiberg, Lev N Novikov
Obstetrical brachial plexus injury refers to injury observed at the time of delivery, which may lead to major functional impairment in the upper limb. In this study, the neuroprotective effect of early nerve repair following complete brachial plexus injury in neonatal rats was examined. Brachial plexus injury induced 90% loss of spinal motoneurons and 70% decrease in biceps muscle weight at 28 days after injury. Retrograde degeneration in spinal cord was associated with decreased density of dendritic branches and presynaptic boutons and increased density of astrocytes and macrophages/microglial cells...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/28949091/new-approach-for-the-treatment-of-neuropathic-pain-fibroblast-growth-factor-1-gene-transfected-adipose-derived-mesenchymal-stem-cells
#17
F Forouzanfar, B Amin, A Ghorbani, H Ghazavi, F Ghasemi, K Sadri, S Mehri, H R Sadeghnia, H Hosseinzadeh
BACKGROUND: Neuropathic pain triggered by peripheral nerve lesion is extremely difficult to manage with current approaches, hence the importance of exploring therapeutic alternatives. METHODS: We have analysed adipose-derived mesenchymal stem cells (AD-MSCs) and fibroblast growth factor 1 gene-transfected adipose-derived mesenchymal stem cells (AD-MSCs (FGF)(1) ) on chronic constriction injury (CCI). The mechanical and thermal hypersensitivity were assessed using the von Frey filament, radiant heat and acetone drop tests...
September 26, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28948211/fabrication-and-characterization-of-microspheres-encapsulating-astrocytes-for-neural-regeneration
#18
Marcus Berndt, Yongchao Li, Negar Seyedhassantehrani, Li Yao
Astrocytes play a critical role in supporting the normal physiological function of neurons. Recent studies have revealed that astrocyte transplantation can promote axonal regeneration and functional recovery after spinal cord injury. Biomaterial can be designed as a growth-permissive substrate and serve as a carrier for astrocyte transplantation into injured spinal cord. In this study, we developed a method to generate collagen microspheres encapsulating astrocytes by injecting a mixture of collagen and astrocytes into a cell culture medium with a syringe controlled by a syringe pump...
July 10, 2017: ACS Biomaterials Science & Engineering
https://www.readbyqxmd.com/read/28947688/-pathophysiology-and-treatment-of-orofacial-pain
#19
Masamichi Shinoda, Noboru Noma
"Pain" is one of body defense mechanisms and crucial for the life support. However, orofacial pain such as myofascial pain syndrome, burning mouth syndrome and trigeminal neuralgia plays no part in body defense mechanisms and requires therapeutic intervention. Recent studies have indicated that plastic changes in the activities of trigeminal neurons, satellite glial cells in trigeminal ganglion, secondary neurons, microglia and astrocytes in trigeminal spinal subnucleus following orofacial inflammation and trigeminal nerve injury are responsible for orofacial pain mechanisms...
2017: Clinical Calcium
https://www.readbyqxmd.com/read/28938612/magnetic-resonance-imaging-tracking-and-assessing-repair-function-of-the-bone-marrow-mesenchymal-stem-cells-transplantation-in-a-rat-model-of-spinal-cord-injury
#20
Hongwu Zhang, Liqin Wang, Shihong Wen, Qingfeng Xiang, Xianhong Xiang, Caixia Xu, Yong Wan, Jingnan Wang, Bin Li, Yiqian Wan, Zhiyun Yang, David Y B Deng
The transplantation of bone marrow mesenchymal stem cells (BMSCs) to repair spinal cord injury (SCI) has become a promising therapy. However, there is still a lack of visual evidence directly implicating the transplanted cells as the source of the improvement of spinal cord function. In this study, BMSCs were labeled with NF-200 promoter and lipase-activated gadolinium-containing nanoparticles (Gd-DTPA-FA). Double labeled BMSCs were implanted into spinal cord transaction injury in rat models in situ, the function recovery was evaluated on 1st, 7th, 14th, 28 th days by MRI, Diffusion Tensor Imaing, CT imaging and post-processing, and histological observations...
August 29, 2017: Oncotarget
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