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Neuropathic pain

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https://www.readbyqxmd.com/read/29786105/cannabinoid-win-55-212-2-mesylate-inhibits-tumor-necrosis-factor-%C3%AE-induced-expression-of-nitric-oxide-synthase-in-dorsal-root-ganglion-neurons
#1
Rong Tan, Lijun Cao
Tumor necrosis factor-α (TNF-α) is an established pain modulator in the peripheral nervous system. Elevated levels of TNF-α in dorsal root ganglion (DRG) neurons reportedly is critical for neuropathic pain processing. It has been shown that the production of nitric oxide, a key player in the development and maintenance of nociception, depends on the expression of nitric oxide synthases (NOSs) and their activities. Accumulating evidence also supports an important role of cannabinoids in modulating neuropathic pain...
May 17, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29784434/cell-therapy-with-autologous-mesenchymal-stromal-cells-in-post-traumatic-syringomyelia
#2
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
#3
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/29783695/application-of-a-novel-anti-adhesive-membrane-e8002-in-a-rat-laminectomy-model
#4
Kiyoshi Kikuchi, Kentaro Setoyama, Takuto Terashi, Megumi Sumizono, Salunya Tancharoen, Shotaro Otsuka, Seiya Takada, Kazuki Nakanishi, Koki Ueda, Harutoshi Sakakima, Ko-Ichi Kawahara, Ikuro Maruyama, Gohsuke Hattori, Motohiro Morioka, Eiichiro Tanaka, Hisaaki Uchikado
Neuropathic pain after spinal surgery, so-called failed back surgery syndrome, is a frequently observed common complication. One cause of the pain is scar tissue formation, observed as post-surgical epidural adhesions. These adhesions may compress surrounding spinal nerves, resulting in pain, even after successful spinal surgery. E8002 is an anti-adhesive membrane. In Japan, a clinical trial of E8002 is currently ongoing in patients undergoing abdominal surgery. However, animal experiments have not been performed for E8002 in spinal surgery...
May 18, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29782907/analgesic-effect-of-intrathecal-baclofen-bolus-on-neuropathic-pain-in-spinal-cord-injury-patients
#5
Hatice Kumru, Jesus Benito-Penalva, Markus Kofler, Joan Vidal
BACKGROUND: GABA-ergic neurons are widely distributed throughout the central nervous system, including the spinal cord which is important for the transmission of pain impulses to the brain. Here we hypothesized that intrathecal baclofen (ITB) which is a GABA analogue might exert analgesic effects on neuropathic pain, which could be related to subtypes of pain in spinal cord injury (SCI). METHODS: SCI patients with a cervical or thoracic lesion and neuropathic pain were randomized to receive either a single ITB bolus or placebo...
May 18, 2018: Brain Research Bulletin
https://www.readbyqxmd.com/read/29782537/changes-in-the-vibration-sensitivity-and-pressure-pain-thresholds-in-patients-with-burning-mouth-syndrome
#6
Brenda de Souza Moura, Natália Dos Reis Ferreira, Marcos F DosSantos, Maria Elisa Rangel Janini
OBJECTIVE: To investigate the presence of changes in vibration detection and pressure pain threshold in patients with burning-mouth syndrome (BMS). DESIGN OF THE STUDY: Case-control study. The sample was composed of 30 volunteers, 15 with BMS and 15 in the control group. The pressure-pain threshold (PPT) and vibration-detection threshold (VDT) were examined. The clinical evaluation was complemented with the McGill Pain Questionnaire (MPQ), Douleur Neuropathique 4 (DN4) and Beck Depression and Anxiety Inventories (BDI and BAI, respectively)...
2018: PloS One
https://www.readbyqxmd.com/read/29782470/characterizing-abdominal-pain-in-patients-with-gastroparesis-into-neuropathic-and-nociceptive-components
#7
Asad Jehangir, Rany T Abdallah, Henry P Parkman
INTRODUCTION: The cause of abdominal pain (AP) in gastroparesis (Gp) is often not known; hence, its treatment can be challenging. Preoccupation with or increased attention (hypervigilance) to pain is associated with perceived pain severity and psychosocial disability. The aims of this study were to (1) characterize AP in Gp patients into neuropathic and nociceptive pain components; (2) assess these patients for hypervigilance to pain. MATERIALS AND METHODS: Gp patients with AP as an important symptom, seen from June 2017 to November 2017 were given validated questionnaires to characterize their AP...
May 18, 2018: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/29781959/involvement-of-the-vgf-derived-peptide-tlqp-62-in-nerve-injury-induced-hypersensitivity-and-spinal-neuroplasticity
#8
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/29781509/comparative-analgesic-efficacy-of-pregabalin-administered-according-to-either-a-prevention-protocol-or-an-intervention-protocol-in-rats-with-cisplatin-induced-peripheral-neuropathy
#9
F Y Han, A Kuo, J R Nicholson, L Corradinni, M T Smith
Chemotherapy-induced peripheral neuropathy (CIPN) is a type of peripheral neuropathic pain that may be dose-limiting in patients administered potentially curative cancer chemotherapy dosing regimens. In cancer survivors, persistent CIPN adversely affects patient quality of life and so adjuvant drugs (anticonvulsants e.g. pregabalin or antidepressants e.g. amitriptyline) are recommended for the relief of CIPN. However, most studies in rodent models of CIPN involve administration of single bolus doses of adjuvant drugs to assess pain-relieving efficacy...
May 21, 2018: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29781075/effectiveness-of-gabapentin-pharmacotherapy-in-chemotherapy-induced-peripheral-neuropathy
#10
Magdalena Magnowska, Natalia Iżycka, Joanna Kapoła-Czyż, Anna Romała, Jakub Lorek, Marek Spaczyński, Ewa Nowak-Markwitz
OBJECTIVES: Chemotherapy-induced peripheral neuropathy (CIPN) is a common chemotherapy side effect, but its prevention and treatment remains a challenge. Neurotoxicity may lead to dose limitation or even treatment discontinuation, and therefore potentially affect the efficacy of anticancer treatment and long term outcomes. The practice to administer gabapentin for neuropathy may be applicable, but is limited by insufficient studies. The aim of our study was to assess the presence of chemotherapy-induced peripheral neuropathy in ovarian cancer patients treated with first-line paclitaxel and carboplatin chemotherapy and evaluate the effectiveness of gabapentin in treatment of this condition...
2018: Ginekologia Polska
https://www.readbyqxmd.com/read/29780165/a-medial-prefrontal-cortex-nucleus-acumens-corticotropin-releasing-factor-circuitry-for-neuropathic-pain-increased-susceptibility-to-opioid-reward
#11
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
#12
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/29776346/a-systematic-review-of-the-risk-factors-for-clinical-response-to-opioids-for-all-age-patients-with-cancer-related-pain-and-presentation-of-the-paediatric-stop-pain-study
#13
Ersilia Lucenteforte, Laura Vagnoli, Alessandra Pugi, Giada Crescioli, Niccolò Lombardi, Roberto Bonaiuti, Maurizio Aricò, Sabrina Giglio, Andrea Messeri, Alessandro Mugelli, Alfredo Vannacci, Valentina Maggini
BACKGROUND: Inter-patient variability in response to opioids is well known but a comprehensive definition of its pathophysiological mechanism is still lacking and, more importantly, no studies have focused on children. The STOP Pain project aimed to evaluate the risk factors that contribute to clinical response and adverse drug reactions to opioids by means of a systematic review and a clinical investigation on paediatric oncological patients. METHODS: We conducted a systematic literature search in EMBASE and PubMed up to the 24th of November 2016 following Cochrane Handbook and PRISMA guidelines...
May 18, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29775691/pain-in-maintenance-hemodialysis-patients-a-multicenter-study
#14
Tatiana Talya Fleishman, Jacob Dreiher, Pesach Shvartman
CONTEXT: Pain is a common complaint in maintenance hemodialysis (MHD) patients, yet is often inadequately assessed and undertreated. OBJECTIVES: To evaluate the prevalence, characteristics, intensity, and impact of pain in MHD patients. METHODS: In a cross-sectional study conducted between 2013 and 2015, 336 MHD patients from five hemodialysis units in hospitals owned by Clalit were interviewed and evaluated. Study tools included the Brief Pain Inventory, The Leeds Assessment of Neuropathic Symptoms and Signs pain scale, demographic and clinical characteristics...
May 15, 2018: Journal of Pain and Symptom Management
https://www.readbyqxmd.com/read/29775149/added-value-of-multiple-versus-single-sessions-of-repetitive-transcranial-magnetic-stimulation-in-predicting-motor-cortex-stimulation-efficacy-for-refractory-neuropathic-pain
#15
Benjamin Pommier, Charles Quesada, Camille Fauchon, Christophe Nuti, François Vassal, Roland Peyron
OBJECTIVE Selection criteria for offering patients motor cortex stimulation (MCS) for refractory neuropathic pain are a critical topic of research. A single session of repetitive transcranial magnetic stimulation (rTMS) has been advocated for selecting MCS candidates, but it has a low negative predictive value. Here the authors investigated whether multiple rTMS sessions would more accurately predict MCS efficacy. METHODS Patients included in this longitudinal study could access MCS after at least four rTMS sessions performed 3-4 weeks apart...
May 18, 2018: Journal of Neurosurgery
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
#16
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/29774557/diabetes-induced-microvascular-complications-at-the-level-of-the-spinal-cord-a-contributing-factor-in-diabetic-neuropathic-pain
#17
N Ved, M E Da Vitoria Lobo, S M Bestall, C L Vidueira, N Beazley-Long, K Ballmer-Hofer, M Hirashima, D O Bates, L F Donaldson, R P Hulse
Abnormalities of neurovascular interactions within the central nervous system of diabetic patients is associated with the onset of many neurological disease states. However, to date, the link between the neurovascular network within the spinal cord and regulation of nociception has not been investigated despite neuropathic pain being common in diabetes. We hypothesised that hyperglycaemia-induced endothelial degeneration in the spinal cord, due to suppression of VEGF-A/VEGFR2 signalling, induces diabetic neuropathic pain...
May 17, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29773953/mir-34a-mediated-regulation-of-xist-in-female-cells-under-inflammation
#18
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/29773519/the-neurosteroid-allopregnanolone-sulfate-inhibits-na-v-1-3-%C3%AE-subunit-containing-voltage-gated-sodium-channels-expressed-in-xenopus-oocytes
#19
Takafumi Horishita, Nobuyuki Yanagihara, Susumu Ueno, Dan Okura, Reiko Horishita, Tomoko Minami, Yuichi Ogata, Yuka Sudo, Yasuhito Uezono, Takashi Kawasaki
The neurosteroid allopregnanolone has potent analgesic effects, and its potential use for neuropathic pain is supported by recent reports. However, the analgesic mechanisms are obscure. The voltage-gated sodium channels (Nav ) α subunit Nav 1.3 is thought to play an essential role in neuropathic pain. Here, we report the effects of allopregnanolone sulfate (APAS) on sodium currents (INa ) in Xenopus oocytes expressing Nav 1.3 with β1 or β3 subunits. APAS suppressed INa of Nav 1.3 with β1 and β3 in a concentration-dependent manner (IC50 values; 75 and 26 μmol/L)...
March 30, 2018: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/29771864/cold-pressor-pain-response-in-children-with-cancer
#20
Brooke N Jenkins, Ryan J Roemer, Ariana Martinez, Tara K Torres, Michelle A Fortier
OBJECTIVE: The goal of this study was to examine pain responses in pediatric patients with cancer. METHOD: Children (ages 6 to 18) undergoing treatment for cancer (N=68) completed the cold pressor task. RESULTS: Average pain tolerance was 118.22 seconds (SD=101.18) and 40% of the children kept their hand in the water the entire 4-minute ceiling. On a 0 to 10 numeric rating scale, children reported a pain severity of 5.07 (SD=3.47) at their first report of pain, a pain severity of 5...
May 16, 2018: Journal of Pediatric Hematology/oncology
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