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https://www.readbyqxmd.com/read/28546769/treatment-of-chronic-low-back-pain-new-approaches-on-the-horizon
#1
REVIEW
Nebojsa Nick Knezevic, Shane Mandalia, Jennifer Raasch, Ivana Knezevic, Kenneth D Candido
Back pain is the second leading cause of disability among American adults and is currently treated either with conservative therapy or interventional pain procedures. However, the question that remains is whether we, as physicians, have adequate therapeutic options to offer to the patients who suffer from chronic low back pain but fail both conservative therapy and interventional pain procedures before they consider surgical options such as discectomy, disc arthroplasty, or spinal fusion. The purpose of this article is to review the potential novel therapies that are on the horizon for the treatment of chronic low back pain...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28536509/chronic-social-stress-time-dependently-affects-neuropathic-pain-related-cold-allodynia-and-leads-to-altered-expression-of-spinal-biochemical-mediators
#2
Glenn-Marie Le Coz, Julien Genty, Fernand Anton, Ulrike Hanesch
Clinical data have shown that chronic exposure to stress may be accompanied by an enhancement of inflammation-related pain sensitivity. In this context, little is however known on the impact of stress on neuropathic pain. In the present study we addressed this issue by combining the chronic constriction injury (CCI) model with an ongoing social stress (OSS) paradigm. Cold plate and von Frey tests were performed in 48 rats divided into four groups: OSS exposed to OSS, CCI subjected to chronic nerve constriction, OSS+CCI with a combination of neuropathy and stress and CON, a control group lacking any manipulation...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28533177/immunohistochemical-comparison-of-astrocytic-mglur5-upregulation-in-infraorbital-nerve-versus-sciatic-nerve-ligated-rat
#3
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/28527062/the-prokineticin-system-an-interface-between-neural-inflammation-and-pain
#4
Silvia Franchi, Paola Sacerdote, Alberto Panerai
Prokineticins (PK) 1 and 2 belong to a new family of chemokines capable to interact with two different G coupled receptors: Prokineticin receptor (PKR)1 and 2. Both prokineticins and their receptors are widely distributed in different tissues and regulate several biological functions. In particular, a role of the PK system in inflammation and nociception has been established. PKRs are expressed in regions of the nervous system associated with pain and in primary sensitive neurons they colocalize with transient potential receptor vanilloid-TRPV1 providing an anatomical interaction in nociceptor sensitization...
May 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28514742/effect-and-mechanism-of-inhibition-of-pi3k-akt-mtor-signal-pathway-on-chronic-neuropathic-pain-and-spinal-microglia-in-a-rat-model-of-chronic-constriction-injury
#5
Jian-Rong Guo, Huan Wang, Xiao-Ju Jin, Dong-Lin Jia, Xun Zhou, Qiang Tao
OBJECTIVE: To explore the effects of inhibition of PI3K/Akt/mTOR signal pathway on chronic neuropathic pain (CNP) and spinal microglia in a rat model of chronic constriction injury (CCI). METHODS: Male SD rats were assigned into control, sham, CCI, wortmannin, dimethyl sulfoxide (DMSO) and wortmannin-positive control groups. Paw withdrawal mechanical threshold (PWMT) and thermal withdrawal latency (TWL) were recorded. qRT-PCR and Western blotting were used to detect PI3K, Akt and mTOR expressions and their phosphorylation...
May 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28505030/association-between-neurotrophic-factor-expression-and-pain-related-behavior-induced-by-nucleus-pulposus-applied-to-rat-nerve-root
#6
Shinobu Seki, Miho Sekiguchi, Shin-Ichi Konno
STUDY DESIGN: An experimental animal study OBJECTIVE.: To investigate the relationship between pain-related behavior and the expression of neurotrophic factors in the dorsal root ganglion (DRG) and spinal cord (SC) using a nucleus pulposus (NP) rat model. SUMMARY OF BACKGROUND DATA: Neurotrophic factors are released from activated glial cells and are associated with pain-related behavior. Nerve growth factor (NGF) is a neurotrophic factor that is induced by inflammation...
April 12, 2017: Spine
https://www.readbyqxmd.com/read/28503634/an-acute-mouse-spinal-cord-slice-preparation-for-studying-glial-activation-ex-vivo
#7
Juan Mauricio Garré, Guang Yang, Feliksas F Bukauskas, Michael V L Bennett
Pathological conditions such as amyotrophic lateral sclerosis, spinal cord injury and chronic pain are characterized by activation of astrocytes and microglia in spinal cord and have been modeled in rodents. In vivo imaging at cellular level in these animal models is limited due to the spinal cord's highly myelinated funiculi. The preparation of acute slices may offer an alternative and valuable strategy to collect structural and functional information in vitro from dorsal, lateral and ventral regions of spinal cord...
January 20, 2017: Bio-protocol
https://www.readbyqxmd.com/read/28499503/mast-cells-in-neuroinflammation-and-brain-disorders
#8
REVIEW
Erik Hendriksen, Doris van Bergeijk, Ronald S Oosting, Frank A Redegeld
It is well recognized that neuroinflammation is involved in the pathogenesis of various neurodegenerative diseases. Microglia and astrocytes are major pathogenic components within this process and known to respond to proinflammatory mediators released from immune cells such as mast cells. Mast cells reside in the brain and are an important source of inflammatory molecules. Mast cell interactions with glial cells and neurons result in the release of mediators such as cytokines, proteases and reactive oxygen species...
May 10, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28492437/continuous-intrathecal-infusion-of-cannabinoid-receptor-agonists-attenuates-nerve-ligation-induced-pain-in-rats
#9
Sheng-Jie Shiue, Hsien-Yu Peng, Chung-Ren Lin, Shih-Wei Wang, Ruey-Horng Rau, Jen-Kun Cheng
BACKGROUND AND OBJECTIVES: Cannabinoid receptors (CB1R/CB2R) are known to play important roles in pain transmission. In this study, we investigated the effects of continuous intrathecal infusion of CB1/2R agonists in the L5/6 spinal nerve ligation pain model. METHODS: Under isoflurane anesthesia, rats received nerve ligation and intrathecal catheter connected to an infusion pump. After surgery, saline (1 μL/h), CB1/2R agonist WIN55,212-2, CB1R agonist ACEA, or CB2R agonist AM1241 (1 μmol/h) was given intrathecally for 7 days...
May 10, 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/28479215/local-injection-to-sciatic-nerve-of-dex-reduces-pain-behaviors-sgcs-activation-ngf-expression-and-sympathetic-sprouting-in-cci-rats
#10
Jing-Ru Wu, Hui Chen, Deng-Xin Zhang, Kai Jiang, Ying-Ying Yao, Ming-Ming Zhang, Bo Zhou, Jie Wang
Neuropathic pain has become an intractable health threat, with its profound effect on quality of life. Dorsal root ganglia (DRG) is evidenced to play a crucial role in neuropathic pain. The peripheral nociceptive afferents seem to be essential not only to initiate the process of neuropathic pain, but also to maintain and modulate it. Dexmedetomidine (DEX), a highly selective agonist of α2-adrenergic receptor (α2-AR), has provided significant analgesia in neuropathic pain. In the present study, we found that local injection to sciatic nerve of DEX alleviated heat hypersensitivity induced by chronic constriction injury (CCI)...
May 4, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28474563/opioids-and-the-blood-brain-barrier-a-dynamic-interaction-with-consequences-on-drug-disposition-in-brain
#11
Catarina Chaves, Fernando Remião, Salvatore Cisterninoa, Xavier Declèves
Opioids are widely used in pain management whose effects are due to binding to classical opioid receptors and/or Toll-like receptors (TLR) present at the central nervous system (CNS). At the blood-brain barrier (BBB), several influx and/or efflux transporters are expressed, such as the ATP-binding cassette (ABC) P-glycoprotein (P-gp, ABCB1), Breast Cancer Resistance Protein (BCRP, ABCG2) and multidrug resistance-associated proteins (MRP, ABCC) transporters, and solute carrier transporters (SLC), and are responsible for the transport of many xenobiotics from the brain into the bloodstream or vice versa...
May 3, 2017: Current Neuropharmacology
https://www.readbyqxmd.com/read/28461136/olfactory-ensheathing-cell-transplantation-inhibits-p2x4-receptor-overexpression-in-spinal-cord-injury-rats-with-neuropathic-pain
#12
Zuncheng Zheng, Xiaojing Du, Kaigang Zhang, Xiaoyu Wang, Yuexia Chen, Naifeng Kuang, Tao Fan, Baoliang Sun
Cell-based therapy is a promising strategy to alleviate neuropathic pain caused by spinal cord injury (SCI). We transplanted olfactory ensheathing cells (OECs) into SCI rats with neuropathic pain and quantitatively detected the sensory nerve function. The expression levels of P2X4 receptor (P2X4R), 200kD neurofilament heavy polypeptide (NF200), and glial fiber acidic protein (GFAP) were measured by immunofluorescence and Western blot analyses. Results showed that NF200 expression significantly increased, GFAP expression decreased, and sensory nerve function improved...
April 28, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28458288/neuropharmacological-study-of-atp-receptors-especially-in-the-relationship-between-glia-and-pain
#13
Kazuhide Inoue
 A growing body of evidence indicates that extracellular ATP released or leaked from nonexcitable cells as well as neurons plays important roles in the regulation of neuronal and glial functions in the entire body through ATP receptors. ATP receptors (ionotropic P2X and metabotropic P2Y receptors) are the most abundant receptor families in living organisms. In the central nervous system, these receptors participate in the synaptic transmission and intercellular communications between neurons and glia. The glia cells are classified into three types: astrocytes; oligodendrocytes; and microglia...
2017: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
https://www.readbyqxmd.com/read/28450945/bupivacaine-effectively-relieves-inflammation-induced-pain-by-suppressing-activation-of-the-nf-%C3%AE%C2%BAb-signalling-pathway-and-inhibiting-the-activation-of-spinal-microglia-and-astrocytes
#14
Jingliang Zhang, Xinlian Deng
The pain induced by local acute inflammation results in mild to severe discomfort, in addition to the possibility of physiological dysfunction and psychiatric disorders, such as sleep disorders and depression. However, the pathogenesis of pain is yet to be fully elucidated. In the present study, the effects of bupivacaine were explored in rat models inflammatory pain in order to investigate the anti-pain mechanism of bupivacaine. Complete Freund's adjuvant (CFA) was injected into the right rear foot of the rats to establish a model of transient inflammation-induced pain...
March 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28441718/therapeutic-effect-of-melittin-on-a-rat-model-of-chronic-prostatitis-induced-by-complete-freund-s-adjuvant
#15
Li Lin, Bao-Ping Zhu, Liang Cai
OBJECTIVES: The present study was aimed to establish a model of chronic prostatitis in rat with the use of intraprostatic injection of Complete Freund's Adjuvant, and to examine the anti-inflammatory and analgesic effects of melittin on the newly-developed chronic prostatic pain model. METHODS: Adult male Sprague-Dawley rats were injected with Complete Freund's Adjuvant (CFA) into the prostate. Twelve days after model rats of the treatment group were injected melittin into the prostate, while those of the control group received sterile saline injection...
June 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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
#16
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/28417467/retraction-statement-cxcl12-cxcr4-chemokine-signaling-in-spinal-glia-induces-pain-hypersensitivity-through-mapks-mediated-neuroinflammation-in-bone-cancer-rats
#17
(no author information available yet)
'CXCL12/CXCR4 chemokine signaling in spinal glia induces pain hypersensitivity through MAPKs-mediated neuroinflammation in bone cancer rats' by Hu X.-M., Liu Y.-N., Zhang H.-L., Cao S.-B., Zhang T., Chen L.-P. and Shen W. The above article from Journal of Neurochemistry, published online on 26 January 2015 and in volume 132, issue 4, pages 452-463 (available through www.onlinelibrary.wiley.com), and its subsequent Corrigendum, published online on 5 February 2015 and in volume 132, issue 4, p. 487, have been retracted by agreement between the Journal's Editor-in-Chief, Jörg Schulz, corresponding author Wen Shen on behalf of the authors, and John Wiley & Sons Ltd...
May 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28396046/minocycline-prevents-muscular-pain-hypersensitivity-and-cutaneous-allodynia-produced-by-repeated-intramuscular-injections-of-hypertonic-saline-in-healthy-human-participants
#18
Mohamad Samir Samour, Saad Saulat Nagi, Peter John Shortland, David Anthony Mahns
Minocycline, a glial suppressor, prevents behavioural hypersensitivities in animal models of peripheral nerve injury. However clinical trials of minocycline in human studies have produced mixed results. This study addressed two questions: can repeated injections of hypertonic saline (HS) in humans induce persistent hypersensitivity? Can pre-treatment with minocycline, a tetracycline antibiotic with microglial inhibitory effects, prevent the onset of hypersensitivity? Twenty seven healthy participants took part in this double-blind, placebo-controlled study, consisting of six test sessions across 2 weeks...
April 7, 2017: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/28393896/effects-of-ibudilast-on-the-subjective-reinforcing-and-analgesic-effects-of-oxycodone-in-recently-detoxified-adults-with-opioid-dependence
#19
Verena E Metz, Jermaine D Jones, Jeanne Manubay, Maria A Sullivan, Shanthi Mogali, Andrew Segoshi, Gabriela Madera, Kirk W Johnson, Sandra D Comer
Ibudilast, a nonselective phosphodiesterase inhibitor, is used clinically in Asia for the treatment of asthma and poststroke dizziness. Recent preclinical studies have suggested that it also inhibits glial cell activation in rodents, and may alter opioid-mediated effects, including analgesia and withdrawal symptoms. The effects of ibudilast on the abuse potential of opioids in humans are largely unknown. The present study was designed to examine the influence of ibudilast on subjective (including drug craving), reinforcing, and analgesic effects of oxycodone in human volunteers diagnosed with opioid dependence (equivalent to moderate-severe opioid use disorder)...
May 10, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28389872/modulation-of-pain-and-itch-by-spinal-glia
#20
REVIEW
Makoto Tsuda
Chronic pain and itch are a pathological operation of the somatosensory system at the levels of primary sensory neurons, spinal cord and brain. Pain and itch are clearly distinct sensations, and recent studies have revealed the separate neuronal pathways that are involved in each sensation. However, the mechanisms by which these sensations turn into a pathological chronic state are poorly understood. A proposed mechanism underlying chronic pain and itch involves abnormal excitability in dorsal horn neurons in the spinal cord...
April 7, 2017: Neuroscience Bulletin
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