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https://www.readbyqxmd.com/read/28916845/pharmacological-investigations-on-mast-cell-stabilizer-and-histamine-receptor-antagonists-in-vincristine-induced-neuropathic-pain
#1
Amteshwar Singh Jaggi, Gunjanpreet Kaur, Anjana Bali, Nirmal Singh
The present study was designed to investigate the role of mast cells and mast cell-derived histamine in vincristine-induced neuropathic pain. Neuropathic pain was induced by administration of vincristine (100 μg/kg, i.p.) over a period of 10 days, with a break of 2 days, and pain behavioural estimations including pin prick, hot plate and acetone spray tests were performed to assess mechanical and heat hyperalgesia and cold allodynia, respectively, on days 0, 14 and 28. Mast cell stabilizer, sodium cromoglycate, H1 receptor antagonist promethazine and H2 receptor antagonist ranitidine were administered over a period of 12 days...
September 15, 2017: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/28915703/treatments-of-traumatic-neuropathic-pain-a-systematic-review
#2
REVIEW
Chenglun Yao, Xijie Zhou, Bin Zhao, Chao Sun, Keshav Poonit, Hede Yan
Traumatic neuropathic pain caused by traumatic neuroma has long been bothering both doctors and patients, the mechanisms of traumatic neuropathic pain are widely discussed by researchers and the treatment is challenging. Clinical treatment of painful neuroma is unclear. Numerous treatment modalities have been introduced by experts in this field. However, there is still no single standard recognized treatment. Different forms of treatments have been tested in animals and humans, but pharmacotherapies (antidepressants, antiepileptics) remain the basis of traumatic neuropathic pain management...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28915149/bulleyaconitine-a-preferably-reduces-tetrodotoxin-sensitive-sodium-current-in-uninjured-dorsal-root-ganglion-neurons-of-neuropathic-rats-probably-via-inhibition-of-protein-kinase-c
#3
Man-Xiu Xie, Rui-Ping Pang, Jie Yang, Kai-Feng Shen, Jing Xu, Xiong-Xiong Zhong, Shao-Kun Wang, Xiao-Long Zhang, Yan-Qing Liu, Xian-Guo Liu
Oral Bulleyaconitine A (BLA) is effective for treating neuropathic pain in human patients, but the underlying mechanism is poorly understood. Here, we tested whether BLA blocked voltage-gated sodium channels (VGSCs) in dorsal root ganglion (DRG) neurons. Compelling evidence shows that voltage-gated sodium channels are upregulated in uninjured DRG neurons but downregulated in injured ones following peripheral nerve injury. We found that BLA preferably inhibited Na currents in uninjured DRG neurons in neuropathic rats...
July 17, 2017: Pain
https://www.readbyqxmd.com/read/28914784/antiallodynic-effects-of-bee-venom-in-an-animal-model-of-complex-regional-pain-syndrome-type-1-crps-i
#4
Sung Hyun Lee, Jae Min Lee, Yun Hong Kim, Jung Hyun Choi, Seung Hwan Jeon, Dong Kyu Kim, Hyeon Do Jeong, You Jung Lee, Hue Jung Park
Neuropathic pain in a chronic post-ischaemic pain (CPIP) model mimics the symptoms of complex regional pain syndrome type I (CRPS I). The administration of bee venom (BV) has been utilized in Eastern medicine to treat chronic inflammatory diseases accompanying pain. However, the analgesic effect of BV in a CPIP model remains unknown. The application of a tight-fitting O-ring around the left ankle for a period of 3 h generated CPIP in C57/Bl6 male adult mice. BV (1 mg/kg ; 1, 2, and 3 times) was administered into the SC layer of the hind paw, and the antiallodynic effects were investigated using the von Frey test and by measuring the expression of neurokinin type 1 (NK-1) receptors in dorsal root ganglia (DRG)...
September 15, 2017: Toxins
https://www.readbyqxmd.com/read/28914336/patterns-of-cutaneous-nerve-fibre-loss-and-regeneration-in-type-2-diabetes-with-painful-and-painless-polyneuropathy
#5
Gidon J Bönhof, Alexander Strom, Sonja Püttgen, Bernd Ringel, Jutta Brüggemann, Kálmán Bódis, Karsten Müssig, Julia Szendroedi, Michael Roden, Dan Ziegler
AIMS/HYPOTHESIS: The determinants and mechanisms of the development of diabetic sensorimotor polyneuropathy as a painful (DSPN+p) or painless (DSPN-p) entity remain unclear. We examined the degree of cutaneous nerve fibre loss and regeneration in individuals with type 2 diabetes with DSPN+p or DSPN-p compared with individuals with recent-onset type 2 diabetes and corresponding healthy volunteers. METHODS: In this cross-sectional study, skin biopsies taken from the distal lateral calf were obtained from individuals with recent-onset type 2 diabetes (n = 32) from the German Diabetes Study, with DSPN+p (n = 34) and DSPN-p (n = 32) from the PROPANE study, and volunteers with normal glucose tolerance (n = 50)...
September 15, 2017: Diabetologia
https://www.readbyqxmd.com/read/28912683/nano-scale-biophysical-and-structural-investigations-on-intact-and-neuropathic-nerve-fibers-by-simultaneous-combination-of-atomic-force-and-confocal-microscopy
#6
Gonzalo Rosso, Ivan Liashkovich, Peter Young, Victor Shahin
The links between neuropathies of the peripheral nervous system (PNS), including Charcot-Marie-Tooth1A and hereditary neuropathy with liability to pressure palsies, and impaired biomechanical and structural integrity of PNS nerves remain poorly understood despite the medical urgency. Here, we present a protocol describing simultaneous structural and biomechanical integrity investigations on isolated nerve fibers, the building blocks of nerves. Nerve fibers are prepared from nerves harvested from wild-type and exemplary PNS neuropathy mouse models...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28912674/a-mechanistic-understanding-of-axon-degeneration-in-chemotherapy-induced-peripheral-neuropathy
#7
REVIEW
Yusuke Fukuda, Yihang Li, Rosalind A Segal
Chemotherapeutic agents cause many short and long term toxic side effects to peripheral nervous system (PNS) that drastically alter quality of life. Chemotherapy-induced peripheral neuropathy (CIPN) is a common and enduring disorder caused by several anti-neoplastic agents. CIPN typically presents with neuropathic pain, numbness of distal extremities, and/or oversensitivity to thermal or mechanical stimuli. This adverse side effect often requires a reduction in chemotherapy dosage or even discontinuation of treatment...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28906575/prevalence-correlates-and-impact-of-pain-and-cramps-in-anti-mag-neuropathy-a-multicentre-european-study
#8
Yusuf A Rajabally, Emilien Delmont, Fu Liong Hiew, Anne-Catherine Aubé-Nathier, Aude-Marie Grapperon, Julien Cassereau, Shahram Attarian
BACKGROUND: The frequency of pain and cramps is uncertain in anti-MAG (Anti-myelin associated glycoprotein antibody) neuropathy. Whether these symptoms may affect function/quality of life is unknown. METHODS: We performed a cross-sectional study of the prevalence, correlates and impact of pain, pain subtypes and cramps, their severity, frequency and anatomical distribution, in 55 clinically stable patients with anti-MAG neuropathy. RESULTS: Pain of any type was reported by 80% of subjects...
September 14, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28906391/a-meta-analysis-of-the-preoperative-use-of-gabapentinoids-for-the-treatment-of-acute-postoperative-pain-following-spinal-surgery
#9
Bo Liu, Ruihe Liu, Lifeng Wang
BACKGROUND: Gabapentinoid drugs, which include gabapentin and pregabalin, play an established role in the management of neuropathic pain. However, whether preoperative administration of gabapentinoids has a beneficial role in controlling acute pain after spinal surgery is unknown. We performed a systematic review and meta-analysis of randomized controlled trials (RCTs) to determine the efficacy and safety of the preoperative use of gabapentinoids (gabapentin and pregabalin) for the treatment of acute postoperative pain following spinal surgery...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28905362/transcutaneous-electrical-nerve-stimulation-tens-for-neuropathic-pain-in-adults
#10
REVIEW
William Gibson, Benedict M Wand, Neil E O'Connell
BACKGROUND: Neuropathic pain, which is due to nerve disease or damage, represents a significant burden on people and society. It can be particularly unpleasant and achieving adequate symptom control can be difficult. Non-pharmacological methods of treatment are often employed by people with neuropathic pain and may include transcutaneous electrical nerve stimulation (TENS). This review supersedes one Cochrane Review 'Transcutaneous electrical nerve stimulation (TENS) for chronic pain' (Nnoaham 2014) and one withdrawn protocol 'Transcutaneous electrical nerve stimulation (TENS) for neuropathic pain in adults' (Claydon 2014)...
September 14, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28905186/antidepressants-inhibit-nav1-3-nav1-7-and-nav1-8-neuronal-voltage-gated-sodium-channels-more-potently-than-nav1-2-and-nav1-6-channels-expressed-in-xenopus-oocytes
#11
Takafumi Horishita, Nobuyuki Yanagihara, Susumu Ueno, Dan Okura, Reiko Horishita, Tomoko Minami, Yuichi Ogata, Yuka Sudo, Yasuhito Uezono, Takeyoshi Sata, Takashi Kawasaki
Tricyclic antidepressants (TCAs) and duloxetine are used to treat neuropathic pain. However, the mechanisms underlying their analgesic effects remain unclear. Although many investigators have shown inhibitory effects of antidepressants on voltage-gated sodium channels (Nav) as a possible mechanism of analgesia, to our knowledge, no one has compared effects on the diverse variety of sodium channel α subunits. We investigated the effects of antidepressants on sodium currents in Xenopus oocytes expressing Nav1...
September 14, 2017: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/28904227/peptide-probes-detect-misfolded-transthyretin-oligomers-in-plasma-of-hereditary-amyloidosis-patients
#12
Joseph D Schonhoft, Cecilia Monteiro, Lars Plate, Yvonne S Eisele, John M Kelly, Daniel Boland, Christopher G Parker, Benjamin F Cravatt, Sergio Teruya, Stephen Helmke, Mathew Maurer, John Berk, Yoshiki Sekijima, Marta Novais, Teresa Coelho, Evan T Powers, Jeffery W Kelly
Increasing evidence supports the hypothesis that soluble misfolded protein assemblies contribute to the degeneration of postmitotic tissue in amyloid diseases. However, there is a dearth of reliable nonantibody-based probes for selectively detecting oligomeric aggregate structures circulating in plasma or deposited in tissues, making it difficult to scrutinize this hypothesis in patients. Hence, understanding the structure-proteotoxicity relationships driving amyloid diseases remains challenging, hampering the development of early diagnostic and novel treatment strategies...
September 13, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28904107/hyperpolarization-activated-cyclic-nucleotide-gated-channels-potentially-modulate-axonal-excitability-at-different-thresholds
#13
Dinushi Weerasinghe, Parvathi Menon, Steve Vucic
Hyperpolarization-activated cyclic-nucleotide gated (HCN) channels mediate differences in sensory and motor axonal excitability at different thresholds in animal models. Importantly, HCN channels are responsible for voltage-gated inward rectifying (Ih) currents activated during hyperpolarization. The Ih currents exert a crucial role in determining the resting membrane potential and have been implicated in a variety of neurological disorders, including neuropathic pain. In humans, differences in biophysical properties of motor and sensory axons at different thresholds remain to be elucidated and could provide crucial pathophysiological insights in peripheral neurological diseases...
September 13, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28903493/editor-s-highlight-formulation-and-toxicology-evaluation-of-the-intrathecal-ayx1-dna-decoy-in-sprague-dawley-rats
#14
Julien Mamet, David C Yeomans, Tony L Yaksh, Donald C Manning, Scott Harris
The longevity of pain after surgery is debilitating and limits the recovery of patients. AYX1 is a double-stranded, unprotected, 23 base-pair oligonucleotide designed to reduce acute post-surgical pain and prevent its chronification with a single intrathecal perioperative dose. AYX1 mimics the DNA sequence normally bound by EGR1 on chromosomes, a transcription factor transiently induced in the dorsal root ganglia-spinal cord network following a noxious input. AYX1 binds to EGR1 and prevents it from launching waves of gene regulation that are necessary to maintain pain over time...
September 1, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28902951/brachioradial-pruritus-and-notalgia-paraesthetica-a-comparative-observational-study-of-clinical-presentation-and-morphological-pathologies
#15
Manuel P Pereira, Hannah Lüling, Anette Dieckhöfer, Sabine Steinke, Claudia Zeidler, Sonja Ständer
Brachioradial pruritus (BRP) and notalgia paraesthetica (NP) represent 2 of the most common neuropathic itch syndromes. A total of 58 consecutive patients presenting at the Center for Chronic Pruritus, University Hospital Münster, were analysed with regard to clinical presentation, anatomical and morphological pathologies, impairment in quality of life, and response to treatment with topical capsaicin. Patients with BRP reported stinging and burning more often than those with NP. In the BRP group structural magnetic resonance imaging abnormalities more frequently correlated with localization of the symptoms compared with in patients with NP...
September 13, 2017: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/28902622/functional-interaction-between-n-methyl-d-aspartate-receptor-and-ascorbic-acid-during-neuropathic-pain-induced-by-chronic-constriction-injury-of-the-sciatic-nerve
#16
Sepideh Saffarpour, Farinaz Nasirinezhad
BACKGROUND: Neuropathic pain is a chronic pain condition, which is resistant to therapy. Ascorbate was released because of the activation of glutaminergic neurons. Due to the important role of N-methyl-D-aspartate (NMDA) receptors in the pathophysiology of neuropathic pain, this study investigated the analgesic efficacy of ascorbic acid (AA) in neuropathic pain condition and the role of NMDA receptors in this effect. METHODS: For this purpose, adult male rats were randomly allocated to experimental groups (n=8 in each group)...
September 13, 2017: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/28902183/patient-characteristics-affect-the-response-to-ketamine-and-opioids-during-the-treatment-of-vaso-occlusive-episode-related-pain-in-sickle-cell-disease
#17
Raissa Nobrega, Kathy A Sheehy, Caroline Lippold, Amy L Rice, Julia C Finkel, Zenaide M N Quezado
BackgroundN-methyl-D-aspartate receptor activation has been implicated in the pathobiology of inflammatory, nociceptive and neuropathic pain, opioid tolerance, opioid-induced hyperalgesia, and central sensitization. Some of those mechanisms underlie sickle cell disease(SCD)-associated pain.MethodsWe conducted an exploratory cohort study of SCD patients who during vaso-occlusive episodes (VOEs) received subanesthetic doses of the N-methyl-D-aspartate receptor antagonist, ketamine, as an adjunct to opioids. We sought to identify predictors of changes in pain scores and of the percentage of ketamine infusions associated with meaningful changes (≥20% reduction) in pain and opioid consumption...
September 13, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28902127/altered-gene-expression-of-rnf34-and-pacap-possibly-involved-in-mechanism-of-exercise-induced-analgesia-for-neuropathic-pain-in-rats
#18
Shintaro Yamaoka, Yusuke Oshima, Hideki Horiuchi, Tadao Morino, Masayuki Hino, Hiromasa Miura, Tadanori Ogata
Despite the availability of several modalities of treatment, including surgery, pharmacological agents, and nerve blocks, neuropathic pain is often unresponsive and sometimes progresses to intractable chronic pain. Although exercise therapy is a candidate for treatment of neuropathic pain, the mechanism underlying its efficacy has not been elucidated. To clarify the molecular mechanism for pain relief induced by exercise, we measured Rnf34 and Pacap mRNA levels in the spinal cord dorsal horn of SNL rats, a model of neuropathic pain...
September 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28902092/drugs-for-neuropathic-pain-are-promising-in-treating-feed-induced-dystonia-in-central-nervous-system-disabled-children
#19
Zi-Ye Zhao, Yu-Liang Jiang, En-Da Yu, Shou-Bin Ning
No abstract text is available yet for this article.
September 9, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28902091/neuropathic-pain-as-potential-source-of-feed-induced-dystonia-in-children-with-severe-central-nervous-system-disorders
#20
Julie M Hauer
No abstract text is available yet for this article.
September 9, 2017: Journal of Pediatric Gastroenterology and Nutrition
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