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Chronic neuropathic pain

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https://www.readbyqxmd.com/read/28432164/use-of-gabapentin-in-the-treatment-of-chronic-pain-in-an-adolescent-with-sickle-cell-disease
#1
Cátia R Correia, Ana Teresa Soares, Laura Azurara, Maria João Palaré
Vaso-occlusive crises are the most common manifestation of sickle cell disease (SCD) and the main cause of hospital admission in these patients. There is emerging evidence that vaso-occlusive pain has both nociceptive and neuropathic components. However, the treatment of SCD-related pain with neuropathic drugs has not yet been systematically studied, particularly in children. We describe a 14-year-old girl with SCD and multiple hospital admissions for pain management for severe acute vaso-occlusive pain episodes...
April 21, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28429337/from-acute-to-chronic-pain-tapentadol-in-the-progressive-stages-of-this-disease-entity
#2
F Coluzzi, D Fornasari, J Pergolizzi, P Romualdi
OBJECTIVE: Chronic pain is now recognized as a neural disease, which results from a maladaptive functional and structural transformation process occurring over time. In its chronic phase, pain is not just a symptom but also a disease entity. Therefore, pain must be properly addressed, as many patients still report unsatisfactory pain control despite on-going treatment. The selection of the therapy - taking into account the pathophysiological mechanisms of pain - and the right timing can result in a successful analgesic outcome...
April 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28428749/deep-brain-stimulation-improves-the-symptoms-and-sensory-signs-of-persistent-central-neuropathic-pain-from-spinal-cord-injury-a-case-report
#3
Walter J Jermakowicz, Ian D Hentall, Jonathan R Jagid, Corneliu C Luca, James Adcock, Alberto Martinez-Arizala, Eva Widerström-Noga
Central neuropathic pain (CNP) is a significant problem after spinal cord injury (SCI). Pharmacological and non-pharmacological approaches may reduce the severity, but relief is rarely substantial. While deep brain stimulation (DBS) has been used to treat various chronic pain types, the technique has rarely been used to attenuate CNP after SCI. Here we present the case of a 54-year-old female with incomplete paraplegia who had severe CNP in the lower limbs and buttock areas since her injury 30 years prior. She was treated with bilateral DBS of the midbrain periaqueductal gray (PAG)...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28428628/inflammatory-and-neuropathic-nociception-is-preserved-in-gpr55-knockout-mice
#4
Lawrence M Carey, Tannia Gutierrez, Liting Deng, Wan-Hung Lee, Ken Mackie, Andrea G Hohmann
The G-protein coupled receptor GPR55 has been postulated to serve as a novel cannabinoid receptor. A previous report indicated that GPR55 knockout mice fail to develop mechanical hyperalgesia, suggesting a pro-nociceptive role for GPR55 in the control of nociceptive responding. However, GPR55 knockout mice remain incompletely characterized in models of pathological pain. Here we provide a comprehensive assessment of responses of GPR55 knockout and wild-type mice to mechanical and thermal (heat, cold) stimulation in multiple, mechanistically distinct models of inflammatory and neuropathic pain...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28426550/neuropathic-pain-after-chronic-nerve-constriction-may-not-correlate-with-chloride-dysregulation-in-mouse-trigeminal-nucleus-caudalis-neurons
#5
Alberto Castro, Ying Li, Charles Raver, Ramesh Chandra, Radi Masri, Mary Kay Lobo, Asaf Keller
Changes in chloride reversal potential in rat spinal cord neurons have previously been associated with persistent pain in nerve injury and inflammation models. These changes correlate with a decrease in the expression of the potassium% chloride transporter, KCC2, and with increases in neuronal excitability. Here, we test the hypothesis that similar changes occur in mice with neuropathic pain induced by chronic constriction injury of the trigeminal infraorbital nerve (CCI¬-ION). This model allows us to distinguish an acute pain phase (3-¬5 days after injury) from a persistent pain phase (12¬-14 days after CCI-¬ION)...
April 18, 2017: Pain
https://www.readbyqxmd.com/read/28426255/pregabalin-for-the-treatment-of-neuropathic-pain-a-narrative-review-for-primary-care-providers
#6
Yvonne D'Arcy, Bill McCarberg, Bruce Parsons, Regina Behar, Andrew Thorpe, Andrea Alexander
Neuropathic pain (NeP) is a distinct type of pain caused by damage to the nervous system itself. This often severe and chronic type of pain requires specific treatments that target the underlying pain pathophysiology. The purpose of the current narrative review is to provide an overview of pregabalin (Lyrica®) for the treatment of NeP including its effects on pain, pain-related sleep interference, and other health-related outcomes, timing of therapeutic effect, safety and tolerability, and dosing. The information provided here, along with that in our companion review [1], will help primary care providers develop more effective NeP treatment strategies...
April 20, 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/28425324/persistent-idiopathic-facial-pain
#7
Rafael Benoliel, Charly Gaul
Background Persistent idiopathic facial pain (PIFP) is a chronic disorder recurring daily for more than two hours per day over more than three months, in the absence of clinical neurological deficit. PIFP is the current terminology for Atypical Facial Pain and is characterized by daily or near daily pain that is initially confined but may subsequently spread. Pain cannot be attributed to any pathological process, although traumatic neuropathic mechanisms are suspected. When present intraorally, PIFP has been termed 'Atypical Odontalgia', and this entity is discussed in a separate article in this special issue...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28424990/proteomic-analysis-of-the-hippocampus-in-mouse-models-of-trigeminal-neuralgia-and-inescapable-shock-induced-depression
#8
Qing-Huan Guo, Qing-He Tong, Ning Lu, Hong Cao, Liu Yang, Yu-Qiu Zhang
To investigate the behavioral and biomolecular similarity between neuralgia and depression, a trigeminal neuralgia (TN) mouse model was established by constriction of the infraorbital nerve (CION) to mimic clinical trigeminal neuropathic pain. A mouse learned helplessness (LH) model was developed to investigate inescapable foot-shock-induced psychiatric disorders like depression in humans. Mass spectrometry was used to assess changes in the biomolecules and signaling pathways in the hippocampus from TN or LH mice...
April 19, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28422517/neuropathic-pain-a-narrative-review-of-etiology-assessment-diagnosis-and-treatment-for-primary-care-providers
#9
Bill McCarberg, Yvonne D'Arcy, Bruce Parsons, Alesia Sadosky, Andrew Thorpe, Regina Behar
Neuropathic pain (NeP) is a distinct type of chronic pain that is a direct result of damage to the nervous system itself. Studies have shown that training on the topic of chronic pain in medical schools is lacking and many practitioners are not confident in their ability to effectively manage patients with such pain. The purpose of this narrative review is to provide a brief high-level overview of NeP for primary healthcare providers that includes a discussion of mechanisms, prevalence, burden, assessment, and treatment...
April 19, 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/28420943/neural-mobilization-treatment-decreases-glial-cells-and-brain-derived-neurotrophic-factor-expression-in-the-central-nervous-system-in-rats-with-neuropathic-pain-induced-by-cci-in-rats
#10
Aline Carolina Giardini, Fabio Martinez Dos Santos, Joyce Teixeira da Silva, Mara Evany de Oliveira, Daniel Oliveira Martins, Marucia Chacur
Background. Glial cells are implicated in the development of chronic pain and brain-derived neurotropic factor (BDNF) released from activated microglia contributes to the nociceptive transmission. Neural mobilization (NM) technique is a method clinically effective in reducing pain sensitivity. Here we examined the involvement of glial cells and BDNF expression in the thalamus and midbrain after NM treatment in rats with chronic constriction injury (CCI). CCI was induced and rats were subsequently submitted to 10 sessions of NM, every other day, beginning 14 days after CCI...
2017: Pain Research & Management: the Journal of the Canadian Pain Society
https://www.readbyqxmd.com/read/28416445/%C3%AE-o-conotoxin-gexiva-disulfide-bond-isomers-exhibit-differential-sensitivity-for-various-nicotinic-acetylcholine-receptors-but-retain-potency-and-selectivity-for-the-human-%C3%AE-9%C3%AE-10-subtype
#11
REVIEW
Dongting Zhangsun, Xiaopeng Zhu, Quentin Kaas, Yong Wu, David J Craik, J Michael McIntosh, Sulan Luo
Nicotinic acetylcholine receptor (nAChR) subtypes exhibit distinct neuropharmacological properties that are involved in a range of neuropathological conditions, including pain, addiction, epilepsy, autism, schizophrenia, Tourette's syndrome, Alzheimer's and Parkinson's diseases, as well as many types of cancer. The α9α10 nAChR is a potential target in chronic pain, wound healing, the pathophysiology of the auditory system, and breast and lung cancers. αO-conotoxin GeXIVA is a potent antagonist of rat α9α10 nAChRs, with the 'bead' disulfide bond isomer displaying the lowest IC50 of the three possible isomers...
April 14, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28413428/transcriptomic-evidence-of-a-para-inflammatory-state-in-the-middle-aged-lumbar-spinal-cord
#12
William Galbavy, Yong Lu, Martin Kaczocha, Michelino Puopolo, Lixin Liu, Mario J Rebecchi
BACKGROUND: We have previously reported elevated expression of multiple pro-inflammatory markers in the lumbar spinal cord (LSC) of middle-aged male rats compared to young adults suggesting a para-inflammatory state develops in the LSC by middle age, a time that in humans is associated with the greatest pain prevalence and persistence. The goal of the current study was to examine the transcriptome-wide gene expression differences between young and middle aged LSC. METHODS: Young (3 month) and middle-aged (17 month) naïve Fisher 344 rats (n = 5 per group) were euthanized, perfused with heparinized saline, and the LSC were removed...
2017: Immunity & Ageing: I & A
https://www.readbyqxmd.com/read/28413195/purinergic-signaling-in-microglia-in-the-pathogenesis-of-neuropathic-pain
#13
Kazuhide Inoue
Nerve injury often causes debilitating chronic pain, referred to as neuropathic pain, which is refractory to currently available analgesics including morphine. Many reports indicate that activated spinal microglia evoke neuropathic pain. The P2X4 receptor (P2X4R), a subtype of ionotropic ATP receptors, is upregulated in spinal microglia after nerve injury by several factors, including CC chemokine receptor CCR2, the extracellular matrix protein fibronectin in the spinal cord, interferon regulatory factor 8 (IRF8) and IRF5...
2017: Proceedings of the Japan Academy. Series B, Physical and Biological Sciences
https://www.readbyqxmd.com/read/28405172/mitogen-activated-protein-kinase-phosphatase-3-mkp-3-in-the-surgical-wound-is-necessary-for-the-resolution-of-postoperative-pain-in-mice
#14
Sladjana Skopelja-Gardner, Madhurima Saha, Perla Abigail Alvarado-Vazquez, Brenna S Liponis, Elena Martinez, E Alfonso Romero-Sandoval
Mitogen-activated protein kinase (MAPK) phosphatase-3 (MKP-3) and its substrates (extracellular signal-regulated kinase [ERK] and p38) play an important role in pathophysiological mechanisms of acute postoperative and chronic neuropathic pain in the spinal cord. This study aimed to understand the role of MKP-3 and its target MAPKs at the site of surgical incision in nociceptive behavior. Wild-type (WT) and MKP-3 knockout (KO) mice underwent unilateral plantar hind paw incision. Mechanical allodynia was assessed by using von Frey filaments...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28403399/the-role-of-microglia-in-the-pathobiology-of-neuropathic-pain-development-what-do-we-know
#15
H Zhao, A Alam, Q Chen, M A Eusman, A Pal, S Eguchi, L Wu, D Ma
Neuropathic pain, a maladaptive and chronic condition that can develop after a lesion or disease affecting the somatosensory system, is characterized by allodynia, hyperalgesia and spontaneous pain, and comorbidities such as sleep deprivation, depression and anxiety. The activation of microglial cells in response to nerve injury has been implicated in the development of neuropathic pain. Mediators such as Neuregulin-1, matrix metalloproteinase (MMP)-2, MMP-9, The chemokine (C-C motif) ligand 2 (CCL2) and fractalkine are released after nerve injury and are involved in the activation of microglial cells...
April 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28401489/chemokine-receptor-cxcr3-in-the-spinal-cord-contributes-to-chronic-itch-in-mice
#16
Peng-Bo Jing, De-Li Cao, Si-Si Li, Meixuan Zhu, Xue-Qiang Bai, Xiao-Bo Wu, Yong-Jing Gao
Recent studies have shown that the chemokine receptor CXCR3 and its ligand CXCL10 in the dorsal root ganglion mediate itch in experimental allergic contact dermatitis (ACD). CXCR3 in the spinal cord also contributes to the maintenance of neuropathic pain. However, whether spinal CXCR3 is involved in acute or chronic itch remains unclear. Here, we report that Cxcr3 (-/-) mice showed normal scratching in acute itch models but reduced scratching in chronic itch models of dry skin and ACD. In contrast, both formalin-induced acute pain and complete Freund's adjuvant-induced chronic inflammatory pain were reduced in Cxcr3 (-/-) mice...
April 11, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28399549/cost-effectiveness-data-regarding-spinal-cord-stimulation-for-low-back-pain
#17
Christian Hoelscher, Jonathan Riley, Chengyuan Wu, Ashwini Sharan
STUDY DESIGN: Review of published literature pertaining to spinal cord stimulation cost data analysis. OBJECTIVE: To acquire, organize, and succinctly summarize the available literature regarding the costs associated with, and the cost-effectiveness of, spinal cord stimulation. SUMMARY OF BACKGROUND DATA: Chronic back and limb pain is a pervasive complaint in modern society, with estimated annual costs of medical care greater than $100 billion...
April 10, 2017: Spine
https://www.readbyqxmd.com/read/28397412/prevalence-incidence-indication-and-choice-of-antidepressants-in-patients-with-and-without-chronic-kidney-disease-a-matched-cohort-study-in-uk-clinical-practice-research-datalink
#18
Masao Iwagami, Laurie A Tomlinson, Kathryn E Mansfield, Helen I McDonald, Liam Smeeth, Dorothea Nitsch
PURPOSE: People with chronic kidney disease (CKD) have an increased prevalence of depression, anxiety, and neuropathic pain. We examined prevalence, incidence, indication for, and choice of antidepressants among patients with and without CKD. METHODS: Using the UK Clinical Practice Research Datalink, we identified patients with CKD (two measurements of estimated glomerular filtration rate < 60 mL/min/1.73m(2) for ≥3 months) between April 2004 and March 2014...
April 11, 2017: Pharmacoepidemiology and Drug Safety
https://www.readbyqxmd.com/read/28396715/immunomodulatory-oligonucleotide-imt504-effects-on-mesenchymal-stem-cells-as-a-first-in-class-immunoprotective-immunoregenerative-therapy
#19
REVIEW
Jorge Zorzopulos, Steven M Opal, Andrés Hernando-Insúa, Juan M Rodriguez, Fernanda Elías, Juan Fló, Ricardo A López, Norma A Chasseing, Victoria A Lux-Lantos, Maria F Coronel, Raul Franco, Alejandro D Montaner, David L Horn
The immune responses of humans and animals to insults (i.e., infections, traumas, tumoral transformation and radiation) are based on an intricate network of cells and chemical messengers. Abnormally high inflammation immediately after insult or abnormally prolonged pro-inflammatory stimuli bringing about chronic inflammation can lead to life-threatening or severely debilitating diseases. Mesenchymal stem cell (MSC) transplant has proved to be an effective therapy in preclinical studies which evaluated a vast diversity of inflammatory conditions...
March 26, 2017: World Journal of Stem Cells
https://www.readbyqxmd.com/read/28395733/optical-control-of-pain-in-vivo-with-a-photoactive-mglu5-receptor-negative-allosteric-modulator
#20
Joan Font, Marc López-Cano, Serena Notartomaso, Pamela Scarselli, Paola Di Pietro, Roger Bresolí-Obach, Giuseppe Battaglia, Fanny Malhaire, Xavier Rovira, Juanlo Catena, Jesús Giraldo, Jean-Philippe Pin, Víctor Fernández-Dueñas, Cyril Goudet, Santi Nonell, Ferdinando Nicoletti, Amadeu Llebaria, Francisco Ciruela
Light-operated drugs constitute a major target in drug discovery, since they may provide spatiotemporal resolution for the treatment of complex diseases (i.e. chronic pain). JF-NP-26 is an inactive photocaged derivative of the metabotropic glutamate type 5 (mGlu5) receptor negative allosteric modulator raseglurant. Violet light illumination of JF-NP-26 induces a photochemical reaction prompting the active-drug's release, which effectively controls mGlu5 receptor activity both in ectopic expressing systems and in striatal primary neurons...
April 11, 2017: ELife
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