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Neuropathic pain

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https://www.readbyqxmd.com/read/28535565/ephrinb-ephb-signaling-induces-hyperalgesia-through-erk5-creb-pathway-in-rats
#1
Li-Na Yu, Li-Hong Sun, Min Wang, Lie-Ju Wang, Ying Wu, Jing Yu, Wen-Na Wang, Feng-Jiang Zhang, Xue Li, Min Yan
BACKGROUND: There are numerous studies implicating that EphB receptors and ephrinB ligands play important roles in modulating the transduction of spinal nociceptive information. EphrinB-EphB signaling may contribute to hyperalgesia via various kinds of downstream molecules, the mechanisms of which have not been completely understood. OBJECTIVE: The aim of the present study was to identify whether ephrinB-EphB signaling could contribute to hyperalgesia through ERK5/CREB pathway...
May 2017: Pain Physician
https://www.readbyqxmd.com/read/28535564/the-different-dynamic-changes-of-nerve-growth-factor-in-the-dorsal-horn-and-dorsal-root-ganglion-leads-to-hyperalgesia-and-allodynia-in-diabetic-neuropathic-pain
#2
Zhifeng Gao, Yi Feng, Hui Ju
BACKGROUND: Diabetic peripheral neuropathy (DPN) is the most common complication of diabetes and more than half of the patients with DPN have self-reported symptoms referring to painful diabetic neuropathy (PDN). Nerve growth factor (NGF) is a key factor for the nervous system, but the role of it in the neuropathic pain of diabetic patients is unclear. OBJECTIVE: This study aimed to investigate the relationship between the dynamic expression of NGF in dorsal horn and dorsal root ganglion (DRG) of diabetic rats and hyperalgesia and allodynia in diabetic neuropathic pain...
May 2017: Pain Physician
https://www.readbyqxmd.com/read/28535552/stem-cell-therapy-for-chronic-pain-management-review-of-uses-advances-and-adverse-effects
#3
Krishnan Chakravarthy, Yian Chen, Cathy He, Paul J Christo
BACKGROUND: This review article outlines the recent advances, uses, and adverse effects of cell-based therapy for chronic pain management. Cell based therapies are gaining increasing ground as novel treatment modalities for a variety of pain pathologies that include, but are not limited to, neuropathic pain and degenerative disc disease. As these treatment modalities become more common practice, we have focused our review to provide pain practitioners and other practicing physicians an understanding of the technology and to summarize key clinical data and existing clinical trials that are being pursued by clinical investigators worldwide...
May 2017: Pain Physician
https://www.readbyqxmd.com/read/28535551/angiotensin-converting-enzyme-inhibitors-and-angiotensin-receptor-blockers-modulate-the-function-of-myelinated-fibers-after-chemotherapy-a-quantitative-sensory-testing-study
#4
Carlos J Roldan, Juhee Song, Mitchell P Engle, Patrick M Dougherty
BACKGROUND: Angiotensin-converting enzyme inhibitors (ACEI) and angiotensin receptor blockers (ARB) have sufficient scientific support for their use as tissue protectors. Preliminary studies suggest that their angiotensin-II type 2 receptor (AT2R)-blocking properties have a beneficial profile in the treatment of neuropathic pain. OBJECTIVES: The purpose of the current study was to quantify the extent of the somatosensory effects of ACEI and ARB in cancer patients with chemotherapy-induced peripheral neuropathy...
May 2017: Pain Physician
https://www.readbyqxmd.com/read/28535116/is-mannitol-the-treatment-of-choice-for-patients-with-ciguatera-fish-poisoning
#5
Michael E Mullins, Robert S Hoffman
CONTEXT: Ciguatera fish poisoning arises primarily from consumption of carnivorous reef fish caught in tropical and sub-tropical waters. Ciguatoxins, a class of tasteless, heat-stable, polycyclic toxins produced by dinoflagellates, accumulate through the food chain and concentrate in various carnivorous fish, such as groupers, barracudas, wrasses, amberjack, kingfishes, and eels. Characteristics of ciguatera fish poisoning include early nausea, vomiting, and diarrhea in the first one to two days post ingestion, followed by the appearance of sensory disturbances...
May 23, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28534262/inflammatory-changes-in-paravertebral-sympathetic-ganglia-in-two-rat-pain-models
#6
Ai-Ling Li, Jing-Dong Zhang, Wenrui Xie, Judith A Strong, Jun-Ming Zhang
Injury to peripheral nerves can lead to neuropathic pain, along with well-studied effects on sensory neurons, including hyperexcitability, abnormal spontaneous activity, and neuroinflammation in the sensory ganglia. Neuropathic pain can be enhanced by sympathetic activity. Peripheral nerve injury may also damage sympathetic axons or expose them to an inflammatory environment. In this study, we examined the lumbar sympathetic ganglion responses to two rat pain models: ligation of the L5 spinal nerve, and local inflammation of the L5 dorsal root ganglion (DRG), which does not involve axotomy...
May 22, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28533518/blocking-crmp2-sumoylation-reverses-neuropathic-pain
#7
A Moutal, E T Dustrude, T M Largent-Milnes, T W Vanderah, M Khanna, R Khanna
No abstract text is available yet for this article.
May 23, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28533177/immunohistochemical-comparison-of-astrocytic-mglur5-upregulation-in-infraorbital-nerve-versus-sciatic-nerve-ligated-rat
#8
Benoit Michot, Ronald Deumens, Emmanuel Hermans
The differential pharmacological responsiveness of cephalic and extra-cephalic neuropathic pain has been proposed to relate to distinct mechanisms that may involve neuroinflammatory reactions mediated by glial cells. Astrocytes are particularly important for neuronal sensitization in neuropathic pain, in part through modulation of glutamatergic transmission. Because the metabotropic glutamate receptor 5 (mGluR5) is involved in the astrocytic regulation of the glutamatergic system, we investigated modifications of its expression in models of cephalic versus extra-cephalic neuropathic pain...
May 19, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28532680/decreased-spinal-endomorphin-2-contributes-to-mechanical-allodynia-in-streptozotocin-induced-diabetic-rats
#9
Le Niu, Guang-Hai Dai, Gao-Le He, Ming Yang, Hui-Min Hu, Zhong-Kai Liu, Nian-Song Qian, Yong-Liang Chen
Diabetic neuropathic pain (DNP) plays a major role in decreased life quality of diabetes patients, however, the neural mechanisms underlying DNP remain unclear. Endomorphins are the endogenous ligands for mu-opioid receptor. There is increasing evidence implicating the involvement of spinal endomorphin-2 (EM2) in neuropathic pain. In this study, using a streptozotocin induced diabetic rat model that displayed obvious mechanical allodynia, it was found that the expression of spinal EM2 was significantly decreased in DNP rats...
May 19, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28531306/association-of-long-term-opioid-therapy-with-functional-status-adverse-outcomes-and-mortality-among-patients-with-polyneuropathy
#10
E Matthew Hoffman, James C Watson, Jennifer St Sauver, Nathan P Staff, Christopher J Klein
Importance: Polyneuropathy is one of the most common painful conditions managed within general and specialty clinics. Neuropathic pain frequently leads to decisions about using long-term opioid therapy. Understanding the association of long-term opioid use with functional status, adverse outcomes, and mortality among patients with polyneuropathy could influence disease-specific decisions about opioid treatment. Objectives: To quantify the prevalence of long-term opioid use among patients with polyneuropathy and to assess the association of long-term opioid use with functional status, adverse outcomes, and mortality...
May 22, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/28531237/burden-of-neurological-diseases-in-the-us-revealed-by-web-searches
#11
Ricardo Baeza-Yates, Puneet Mohan Sangal, Pablo Villoslada
BACKGROUND: Analyzing the disease-related web searches of Internet users provides insight into the interests of the general population as well as the healthcare industry, which can be used to shape health care policies. METHODS: We analyzed the searches related to neurological diseases and drugs used in neurology using the most popular search engines in the US, Google and Bing/Yahoo. RESULTS: We found that the most frequently searched diseases were common diseases such as dementia or Attention Deficit/Hyperactivity Disorder (ADHD), as well as medium frequency diseases with high social impact such as Parkinson's disease, MS and ALS...
2017: PloS One
https://www.readbyqxmd.com/read/28530786/morphine-for-chronic-neuropathic-pain-in-adults
#12
REVIEW
Tess E Cooper, Junqiao Chen, Philip J Wiffen, Sheena Derry, Daniel B Carr, Dominic Aldington, Peter Cole, R Andrew Moore
BACKGROUND: Neuropathic pain, which is caused by a lesion or disease affecting the somatosensory system, may be central or peripheral in origin. Neuropathic pain often includes symptoms such as burning or shooting sensations, abnormal sensitivity to normally painless stimuli, or an increased sensitivity to normally painful stimuli. Neuropathic pain is a common symptom in many diseases of the nervous system. Opioid drugs, including morphine, are commonly used to treat neuropathic pain...
May 22, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28530470/cd73-controls-extracellular-adenosine-generation-in-the-trigeminal-nociceptive-nerves
#13
X Liu, L Ma, S Zhang, Y Ren, R T Dirksen
Purinergic signaling is involved in pain generation and modulation in the nociceptive sensory nervous system. Adenosine triphosphate (ATP) induces pain via activation of ionotropic P2X receptors while adenosine mediates analgesia via activation of metabotropic P1 receptors. These purinergic signaling are determined by ecto-nucleotidases that control ATP degradation and adenosine generation. Using enzymatic histochemistry, we detected ecto-AMPase activity in dental pulp, trigeminal ganglia (TG) neurons, and their nerve fibers...
June 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28529795/crystal-structure-of-isopropyl-2-hy-droxy-2-phenyl-acetate-a-pharmacopoeia-reference-standard
#14
Ivan Isaiev, Svitlana Shishkina, Igor Ukrainets, Elena Bevz
The title compound, C11H14O3, is used as a pharmacopoeia reference standard for determining impurities in the drug Pregabalin, used for the treatment of epilepsy and diabetic neuropathic pain. The mol-ecule is far from being planar, with the dihedral angle between the planes of the aromatic ring and the carboxyl fragment (O-C=O) being 76.1 (6)°. The isopropyl substituent is located in a synperiplanar position relative to the C=O bond and is turned so that the C-O-C-H torsion angle is -43.7°. In the crystal, bifurcated O-H⋯(O,O) hydrogen bonds, enclosing R1(2)(5) ring motifs, lead to the formation of chains propagating along the c-axis direction...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28529474/mir-30b-attenuates-neuropathic-pain-by-regulating-voltage-gated-sodium-channel-nav1-3-in-rats
#15
Songxue Su, Jinping Shao, Qingzan Zhao, Xiuhua Ren, Weihua Cai, Lei Li, Qian Bai, Xuemei Chen, Bo Xu, Jian Wang, Jing Cao, Weidong Zang
Nav1.3 is a tetrodotoxin-sensitive isoform among voltage-gated sodium channels that are closely associated with neuropathic pain. It can be up-regulated following nerve injury, but its biological function remains uncertain. MicroRNAs (miRNAs) are endogenous non-coding RNAs that can regulate post-transcriptional gene expression by binding with their target mRNAs. Using Target Scan software, we discovered that SCN3A is the major target of miR-30b, and we then determined whether miR-30b regulated the expression of Nav1...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28529187/multiple-outcomes-and-analyses-in-clinical-trials-create-challenges-for-interpretation-and-research-synthesis
#16
Evan Mayo-Wilson, Nicole Fusco, Tianjing Li, Hwanhee Hong, Joe Canner, Kay Dickersin
OBJECTIVE: To identify variations in outcomes and results across public and non-public reports of randomized clinical trials (RCTs). STUDY DESIGN AND SETTING: Eligible RCTs examined gabapentin for neuropathic pain and quetiapine for bipolar depression, reported in public (e.g., journal articles) and non-public sources (e.g., clinical study reports) available by 2015. We recorded pre-specified outcome domains. We considered outcomes "defined" if they included the domain, measure, metric, method of aggregation, and time-point...
May 18, 2017: Journal of Clinical Epidemiology
https://www.readbyqxmd.com/read/28526335/the-spider-toxin-ph%C3%AE-1%C3%AE-recombinant-possesses-strong-analgesic-activity
#17
Flavia Karine Rigo, Gabriela Trevisan, Samira Dal-Toé De Prá, Marta Nascimento Cordeiro, Marcia Helena Borges, Juliana Figueiredo Silva, Flavia Viana Santa Cecilia, Alessandra Hubner de Souza, Gabriela de Oliveira Adamante, Alessandra Marcon Milioli, Célio José de Castro Junior, Juliano Ferreira, Marcus Vinicius Gomez
The native Phα1β - a Voltage-Gated Calcium Channel (VGCC) blocker - and its Recombinant Version - were both tested in rodent pain models with an intraplantar injections of capsaicin or formalin, a chronic constriction injury, and melanoma cancer related pain. The formalin nociceptive behaviour in the neurogenic phase was not affected by the toxin pre-treatments, while in the inflammatory phase, Phα1β and the Recombinant form caused a significant reduction. The nociception that was triggered by capsaicin, an agonist of the TRPV1 vanilloid receptor, was totally blocked by 100 pmol/site, i...
May 17, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28525735/structure-based-rational-design-of-self-inhibitory-peptides-to-disrupt-the-intermolecular-interaction-between-the-troponin-subunits-c-and-i-in-neuropathic-pain
#18
Junmin Yu, Shilei Wang, Junjie Yu, Chuansheng Liu, Fenghe Xu, Shijie Wang, Yusheng Yi, Yanwei Yin
The troponin (Tn) is a ternary complex consisting of three subunits TnC, TnI and TnT; molecular disruption of the Tn complex has been recognized as an attractive strategy against neuropathic pain. Here, a self-inhibitory peptide is stripped from the switch region of TnI interaction interface with TnC, which is considered as a lead molecular entity and then used to generate potential peptide disruptors of TnC-TnI interaction based on a rational molecular design protocol. The region is a helical peptide segment capped by N- and C-terminal disorders...
May 3, 2017: Bioorganic Chemistry
https://www.readbyqxmd.com/read/28525717/synthesis-and-biological-evaluation-of-novel-neuroprotective-pyridazine-derivatives-as-excitatory-amino-acid-transporter-2-eaat2-activators
#19
Alessia Chelini, Simone Brogi, Marco Paolino, Angela Di Capua, Andrea Cappelli, Gianluca Giorgi, Mersedeh Farzad, Lorenzo Di Cesare Mannelli, Laura Micheli, Carla Ghelardini, Maurizio Anzini
LDN-212320 (3) was found to be a potent EAAT2 activator at a translational level, restoring the normal clearance of glutamate and providing neuronal protection. Since the pharmacologic activation of EAAT2 represents a valuable strategy to relieve neuropathic pain, we synthesized novel activators (4a-f) of EAAT2. Among them 4f, analysed in comparison with compound 3 in different rat models of oxaliplatin-induced neuropathic pain, showed the better anti-hypersensitive profile being able to fully counteract the oxaliplatin-induced neuropathy...
May 19, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28524457/cyclization-of-motor-cortex-stimulation-for-neuropathic-pain-a-prospective-randomized-blinded-trial
#20
Zurab Ivanishvili, Anujan Poologaindran, Christopher R Honey
OBJECTIVES: Programming guidelines for motor cortex stimulation (MCS) in neuropathic pain requires further investigation. After optimizing voltage as a percentage of motor threshold, we evaluated the effect of cyclizing time of stimulation on pain relief for chronic neuropathic pain. METHODS: Six patients were enrolled into this trial. In a prospective, randomized, double-blinded manner, patients were programmed to receive stimulation 100, 83.3, 66.7, or 50% of the time in 30-min intervals...
May 19, 2017: Neuromodulation: Journal of the International Neuromodulation Society
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