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Chronic neuropathic pain

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https://www.readbyqxmd.com/read/29790353/-back-pain-treatment
#1
Marek Hakl
Spine pain is one of the most common medical problems. Yearly incidence is reported between 15 and 45 %, lifelong is 60-90 %. Neurological examination, radiology examination, CT or magnetic resonance imaging are the basic diagnostics. Acute back pain is usually treated monotherapeutically, NSAIDs is the base. Chronic back pain treatment is multidisciplinary, it combines pharmacotherapy, physiotherapy, psychotherapy and other methods. In pharmacotherapy we proceed according to the WHO three-step ladder, including strong opioid medication for strong back pain...
2018: Casopís Lékar̆ů C̆eských
https://www.readbyqxmd.com/read/29789638/human-carbonic-anhydrase-8-aav8-gene-therapy-inhibits-nerve-growth-factor-signaling-producing-prolonged-analgesia-and-anti-hyperalgesia-in-mice
#2
Gerald Z Zhuang, Udita Upadhyay, Xiaoying Tong, Yuan Kang, Diana M Erasso, Eugene S Fu, Konstantinos D Sarantopoulos, Eden R Martin, Tim Wiltshire, Luda Diatchenko, Shad B Smith, William Maixner, Roy C Levitt
Carbonic anhydrase-8 (Car8; murine gene symbol) is an allosteric inhibitor of inositol trisphosphate receptor-1 (ITPR1), which regulates neuronal intracellular calcium release. We previously reported that wild-type Car8 overexpression corrects the baseline allodynia and hyperalgesia associated with calcium dysregulation in the waddle (wdl) mouse due to a 19 bp deletion in exon 8 of the Car8 gene. In this report, we provide preliminary evidence that overexpression of the human wild-type ortholog of Car8 (CA8 WT ), but not the reported CA8 S100P loss-of-function mutation (CA8 MT ), inhibits nerve growth factor (NGF)-induced phosphorylation of ITPR1, TrkA (NGF high-affinity receptor), and ITPR1-mediated cytoplasmic free calcium release in vitro...
April 24, 2018: Gene Therapy
https://www.readbyqxmd.com/read/29784434/cell-therapy-with-autologous-mesenchymal-stromal-cells-in-post-traumatic-syringomyelia
#3
Jesús Vaquero, Mercedes Zurita, Miguel A Rico, Concepcion Aguayo, Cecilia Fernandez, Gregorio Rodriguez-Boto, Esperanza Marin, Noemi Tapiador, Marta Sevilla, Joaquin Carballido, David Vazquez, Damian Garcia-Olmo, Hector Guadalajara, Miguel Leon, Ignacio Valverde
BACKGROUND AIMS: Recently, clinical studies show that cell therapy with mesenchymal stromal cells (MSCs) improves the sequelae chronically established in paraplegic patients, being necessary to know which of them can obtain better benefit. METHODS: We present here a phase 2 clinical trial that includes six paraplegic patients with post-traumatic syringomyelia who received 300 million MSCs inside the syrinx and who were followed up for 6 months. Clinical scales, urodynamic, neurophysiological, magnetic resonance (MR) and studies of ano-rectal manometry were performed to assess possible improvements...
May 18, 2018: Cytotherapy
https://www.readbyqxmd.com/read/29783906/bulleyaconitine-a-attenuates-hyperexcitability-of-dorsal-root-ganglion-neurons-induced-by-spared-nerve-injury-the-role-of-preferably-blocking-nav1-7-and-nav1-3-channels
#4
Man-Xiu Xie, Jie Yang, Rui-Ping Pang, Wei-An Zeng, Han-Dong Ouyang, Yan-Qing Liu, Xian-Guo Liu
Background Oral administration of Bulleyaconitine A, an extracted diterpenoid alkaloid from Aconitum bulleyanum plants, is effective for treating chronic pain in rats and in human patients, but the underlying mechanisms are poorly understood. Results As the hyperexcitability of dorsal root ganglion neurons resulting from the upregulation of voltage-gated sodium (Nav) channels has been proved critical for development of chronic pain, we tested the effects of Bulleyaconitine A on Nav channels in rat spared nerve injury model of neuropathic pain...
January 2018: Molecular Pain
https://www.readbyqxmd.com/read/29781959/involvement-of-the-vgf-derived-peptide-tlqp-62-in-nerve-injury-induced-hypersensitivity-and-spinal-neuroplasticity
#5
Alexander G J Skorput, Xijing Zhang, Jonathan J Waataja, Cristina D Peterson, Maureen S Riedl, Kelley F Kitto, Hai Truong, Cecilia Huffman, Stephen R Salton, Carolyn A Fairbanks, Christopher N Honda, Lucy Vulchanova
Neuroplasticity in the dorsal horn following peripheral nerve damage contributes critically to the establishment of chronic pain. The neurosecretory protein VGF (non-acronymic) is rapidly and robustly upregulated following nerve injury, and therefore peptides generated from it are positioned to serve as signals for peripheral damage. The goal of this project was to understand the spinal modulatory effects of the C-terminal VGF derived peptide TLQP-62 at the cellular level and gain insight into the function of the peptide in the development of neuropathic pain...
May 16, 2018: Pain
https://www.readbyqxmd.com/read/29780165/a-medial-prefrontal-cortex-nucleus-acumens-corticotropin-releasing-factor-circuitry-for-neuropathic-pain-increased-susceptibility-to-opioid-reward
#6
Yuanzhong Kai, Yanhua Li, Tingting Sun, Weiwei Yin, Yu Mao, Jie Li, Wen Xie, Shi Chen, Likui Wang, Juan Li, Zhi Zhang, Wenjuan Tao
Recent studies have shown that persistent pain facilitates the response to morphine reward. However, the circuit mechanism underlying this process remains ambiguous. In this study, using chronic constriction injury (CCI) of the sciatic nerve in mice, we found that persistent neuropathic pain reduced the minimum number of morphine conditioning sessions required to induce conditioned place preference (CPP) behavior. This dose of morphine had no effect on the pain threshold. In the medial prefrontal cortex (mPFC), which is involved in both pain and emotion processing, corticotropin-releasing factor (CRF) expressing neuronal activity was increased in CCI mice...
May 21, 2018: Translational Psychiatry
https://www.readbyqxmd.com/read/29777135/n-methyl-d-aspartate-receptor-subtype-2b-antagonist-ro-25-6981-attenuates-neuropathic-pain-by-inhibiting-postsynaptic-density-95-expression
#7
Ling-Er Huang, Shao-Hui Guo, Lalita Thitiseranee, Yan Yang, Yan-Feng Zhou, Yong-Xing Yao
Postsynaptic density-95 (PSD-95) is a synaptic scaffolding protein that plays a crucial role in the development of neuropathic pain. However, the underlying mechanism remains unclear. To address the role of PSD-95 in N-methyl-D-aspartate receptor subtype 2B (NR2B) -mediated chronic pain, we investigated the relationship between PSD-95 activation and NR2B function in the spinal cord, by using a rat model of sciatic nerve chronic constriction injury (CCI). We demonstrate that the expression levels of total PSD-95 and cAMP response element binding protein (CREB), as well as phosphorylated NR2B, PSD-95, and CREB, in the spinal dorsal horn, and the interaction of NR2B with PSD-95 were increased in the CCI animals...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29774780/increased-levels-of-circulating-gfap-and-crmp2-autoantibodies-in-the-acute-stage-of-spinal-cord-injury-predict-the-subsequent-development-of-neuropathic-pain
#8
Georgene W Hergenroeder, John B Redell, Huimahn Alex Choi, Lisa Hollan Schmitt, William Donovan, Gerard E Francisco, Karl M Schmitt, Anthony N Moore, Pramod K Dash
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 neuropathic pain. In study 1, plasma samples and clinical data from 80 chronic SCI patients (1-41 years post-SCI) were collected and screened for GFAP autoantibodies (GFAPab). Results from study 1 indicated that GFAPab were present in 34 of 80 (42...
May 18, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29773953/mir-34a-mediated-regulation-of-xist-in-female-cells-under-inflammation
#9
Botros B Shenoda, Yuzhen Tian, Guillermo M Alexander, Enrique Aradillas-Lopez, Robert J Schwartzman, Seena K Ajit
Background: Evidence is overwhelming for sex differences in pain, with women representing the majority of the chronic pain patient population. There is a need to explore novel avenues to elucidate this sex bias in the development of chronic inflammatory pain conditions. Complex regional pain syndrome (CRPS) is a chronic neuropathic pain disorder, and the incidence of CRPS is greater in women than in men by ~4:1. Since neurogenic inflammation is a key feature of CRPS, dysregulation of inflammatory responses can be a factor in predisposing women to chronic pain...
2018: Journal of Pain Research
https://www.readbyqxmd.com/read/29770147/koumine-attenuates-neuroglia-activation-and-inflammatory-response-to-neuropathic-pain
#10
Gui-Lin Jin, Sai-Di He, Shao-Mei Lin, Li-Mian Hong, Wan-Qing Chen, Ying Xu, Jian Yang, Su-Ping Li, Chang-Xi Yu
Despite decades of studies, the currently available drugs largely fail to control neuropathic pain. Koumine-an alkaloidal constituent derived from the medicinal plant Gelsemium elegans Benth.-has been shown to possess analgesic and anti-inflammatory properties; however, the underlying mechanisms remain unclear. In this study, we aimed to investigate the analgesic and anti-inflammatory effects and the possible underlying mechanisms of koumine. The analgesic and anti-inflammatory effects of koumine were explored by using chronic constriction injury of the sciatic nerve (CCI) neuropathic pain model in vivo and LPS-induced injury in microglia BV2 cells in vitro ...
2018: Neural Plasticity
https://www.readbyqxmd.com/read/29763654/obturator-neuromodulation-with-laparoscopic-placement-of-an-obturator-lead-for-the-treatment-of-intractable-opioid-dependent-chronic-pelvic-pain-due-to-obturator-neuralgia
#11
Richard P Marvel
Chronic pelvic pain(CPP) is a common condition in women that can have a devastating effect on quality of life. Some of the most severe forms of CPP are related to peripheral nerve injuries causing persistent neuropathic pain. This is a case of a young woman with severe opioid dependent chronic pelvic and right groin pain due to obturator neuralgia. She had failed a multitude of treatments including multiple medications, manual physical therapy, nerve blocks, surgical neurolysis and spinal cord stimulation without significant benefit...
May 12, 2018: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/29760484/top-down-descending-facilitation-of-spinal-sensory-excitatory-transmission-from-the-anterior-cingulate-cortex
#12
Tao Chen, Wataru Taniguchi, Qi-Yu Chen, Hidetoshi Tozaki-Saitoh, Qian Song, Ren-Hao Liu, Kohei Koga, Tsuyoshi Matsuda, Yae Kaito-Sugimura, Jian Wang, Zhi-Hua Li, Ya-Cheng Lu, Kazuhide Inoue, Makoto Tsuda, Yun-Qing Li, Terumasa Nakatsuka, Min Zhuo
Spinal sensory transmission is under descending biphasic modulation, and descending facilitation is believed to contribute to chronic pain. Descending modulation from the brainstem rostral ventromedial medulla (RVM) has been the most studied, whereas little is known about direct corticospinal modulation. Here, we found that stimulation in the anterior cingulate cortex (ACC) potentiated spinal excitatory synaptic transmission and this modulation is independent of the RVM. Peripheral nerve injury enhanced the spinal synaptic transmission and occluded the ACC-spinal cord facilitation...
May 14, 2018: Nature Communications
https://www.readbyqxmd.com/read/29758584/inhibition-of-sympathetic-sprouting-in-ccd-rats-by-lacosamide
#13
Yuying Wang, Fuquan Huo
BACKGROUND: Early hyperexcitability activity of injured nerve/neuron is critical for developing sympathetic nerve sprouting within dorsal root ganglia (DRG). Since lacosamide (LCM), an anticonvulsant, inhibits Na+ channel. The present study tried to test the potential effect of LCM on inhibiting sympathetic sprouting in vivo. METHODS: LCM (50 mg/kg) was daily injected intraperitoneally into rats subjected to chronic compression DRG (CCD), an animal model of neuropathic pain that exhibits sympathetic nerve sprouting, for the 1st 7 days after injury...
May 14, 2018: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/29758357/pharmacopuncture-with-scolopendra-subspinipes-suppresses-mechanical-allodynia-in-oxaliplatin-induced-neuropathic-mice-and-potentiates-clonidine-induced-anti-allodynia-without-hypotension-or-motor-impairment
#14
Seo-Yeon Yoon, Jeong-Yun Lee, Dae-Hyun Roh, Seog Bae Oh
Chemotherapy-induced neuropathic pain is a common dose-limiting side effect of anticancer drugs but lacks an effective treatment strategy. Scolopendra subspinipes (SS) has been used in traditional medicine to treat chronic neuronal diseases. Moreover, pharmacopuncture with SS (SSP) produces potent analgesia in humans and experimental animals. In this study, we examined the effect of SSP into the ST36 acupoint on oxaliplatin-induced mechanical allodynia in mice. Acupoint treatment with SSP (0.5%/20 μL) significantly reduced mechanical allodynia produced by a single oxaliplatin injection (10 mg/kg, i...
May 11, 2018: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/29756060/factors-associated-with-acute-and-chronic-pain-after-inguinal-herniorraphy
#15
Elif Erdogan, Ecder Ozenc
Objectives: The aim of this study was to analyse the relationship between types of anaesthesia, patients' demographic variables, preoperative emotional states and the prevalence of postoperative pain. Method: In this randomized prospective study, postoperative pain was assessed in 100 patients, who were ASA (American Society of Anaesthesiologist) I-II and between 18-65 years old, undergoing inguinal herniorrhaphy with either general or spinal anaesthesia. In addition, postoperative pain compared with patients' demographic properties and psychological conditions in each group was also considered...
April 2018: Romanian Journal of Anaesthesia and Intensive Care
https://www.readbyqxmd.com/read/29754321/chronic-low-back-pain-a-mini-review-on-pharmacological-management-and-pathophysiological-insights-from-clinical-and-pre-clinical-data
#16
REVIEW
Thomas S W Park, Andy Kuo, Maree T Smith
Globally, low back pain (LBP) is one of the most common health problems affecting humans. The lifetime prevalence of non-specific LBP is approximately 84%, with the chronic prevalence at about 23%. Chronic LBP in humans is defined as LBP that persists for more than 12 weeks without a significant pain improvement. Although there are numerous evidence-based guidelines on the management of acute LBP, this is not the case for chronic LBP, which is regarded as particularly difficult to treat. Research aimed at discovering new drug treatments for alleviation of chronic mechanical LBP is lacking due to the paucity of knowledge on the pathobiology of this condition, despite its high morbidity in the affected adult population...
May 12, 2018: Inflammopharmacology
https://www.readbyqxmd.com/read/29752406/the-prostaglandin-e-2-receptor-ep3-controls-cc-chemokine-ligand-mediated-neuropathic-pain-induced-by-mechanical-nerve-damage
#17
Elsa-Marie Treutlein, Katharina Kern, Andreas Weigert, Neda Tarighi, Claus-Dieter Schuh, Rolf M Nüsing, Yannick Schreiber, Nerea Ferreirós, Bernhard Brüne, Gerd Geisslinger, Sandra Pierre, Klaus Scholich
Prostaglandin (PG) E2 is an important lipid mediator that is involved in several pathophysiological processes contributing to fever, inflammation and pain. Previous studies have shown that early and continuous application of non-steroidal anti-inflammatory drugs significantly reduces pain behavior in the spared nerve injury (SNI) model for trauma-induced neuropathic pain. However, the role of PGE2 and its receptors in the development and maintenance of neuropathic pain is incompletely understood, but may help inform strategies for pain management...
May 11, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29752033/effectiveness-of-monopolar-dielectric-transmission-of-pulsed-electromagnetic-fields-for-multiple-sclerosis-related-pain-a-pilot-study
#18
A Hochsprung, S Escudero-Uribe, A J Ibáñez-Vera, G Izquierdo-Ayuso
INTRODUCTION: Pain is highly prevalent in patients with multiple sclerosis (MS); it is chronic in 50% of cases and is classified as nociceptive, neuropathic, or mixed-type. Pain affects quality of life, sleep, and the activities of daily living. Electrotherapy is an interesting alternative or complementary treatment in the management of pain in MS, with new innovations constantly appearing. MATERIAL AND METHODS: This study evaluates the effectiveness of treatment with monopolar dielectric transmission of pulsed electromagnetic fields (PEMF) for pain associated with MS...
May 8, 2018: Neurología: Publicación Oficial de la Sociedad Española de Neurología
https://www.readbyqxmd.com/read/29750900/robot-guided-neuronavigated-repetitive-transcranial-magnetic-stimulation-rtms-in-central-neuropathic-pain-an-update-of-long-term-follow-up
#19
Charles Quesada, Benjamin Pommier, Camille Fauchon, Claire Bradley, Christelle Créac'h, François Vassal, Roland Peyron
OBJECTIVE: To confirm and extend previous results involving repetitive transcranial magnetic stimulation (rTMS) aimed at alleviating refractory central neuropathic pain(CNP). To evaluate pain relief in detail and to assess ongoing benefits after one year of treatment. DESIGN: Prospective observational study. SETTING: University hospital. Outpatient settings. PARTICIPANTS: 80 patients with chronic central pain after brain or spinal cord injuries...
May 8, 2018: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/29750060/fascial-preadipocytes-another-missing-piece-of-the-puzzle-to-understand-fibromyalgia
#20
Bruno Bordoni, Fabiola Marelli, Bruno Morabito, Francesca Cavallaro, David Lintonbon
Fibromyalgia (FM) syndrome is a chronic condition causing pain, affecting approximately 0.5%-6% of the developed countries' population, and on average, 2% of the worldwide population. Despite the large amount of scientific literature available, the FM etiology is still uncertain. The diagnosis is based on the clinical presentation and the severity of the symptomatology. Several studies pointed out pathological alterations within the central nervous system, suggesting that FM could originate from a central sensitization of the pain processing centers...
2018: Open Access Rheumatology: Research and Reviews
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