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https://www.readbyqxmd.com/read/28650880/downward-laminotomy-technique-for-hidden-zone-foraminal-disk-herniations-technical-notes-and-preliminary-results
#1
Sait Naderi, Mehmet R Onen
INTRODUCTION: Hidden zone foraminal herniations are among the more rare forms of herniations. As exploration is difficult, and there is a close relationship between the nerve root and pedicle, many surgical approaches have been proposed. The aim of this study was to describe downward laminotomy as a new approach to these herniations. MATERIALS AND METHODS: A downward laminotomy technique was used in 5 cases with hidden zone foraminal disk herniation with no extension to the intervertebral disk space...
June 23, 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28649767/the-use-of-antioxidant-agents-for-chemotherapy-induced-peripheral-neuropathy-treatment-in-animal-models
#2
REVIEW
Larissa Feitosa Carvalho, Ana Maria Fantini Silva, Adriana Andrade Carvalho
Antineoplastic drugs such as Cisplatin, Oxaliplatin, Paclitaxel and Vincristin are widely used in the treatment for several both solid and blood tumours. However, the severity of peripheral neuropathy caused by these agents can affect the patient's quality of life. The major symptoms of Chemotherapy-Induced Peripheral Neuropathy (CIPN) involve: sensory loss, paresthesia, dysesthaesia, numbness, tingling, temperature sensitivity, allodynia and hyperalgesia, in a "stocking and glove" distribution. Why many different chemotherapeutic agents result in similar neuropathy profiles is unclear...
June 26, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28645297/interleukin-1-receptor-type-1-is-overexpressed-in-neurons-but-not-in-glial-cells-within-the-rat-superficial-spinal-dorsal-horn-in-complete-freund-adjuvant-induced-inflammatory-pain
#3
Krisztina Holló, László Ducza, Zoltán Hegyi, Klaudia Dócs, Krisztina Hegedűs, Erzsébet Bakk, Ildikó Papp, Gréta Kis, Zoltán Mészár, Zsuzsanna Bardóczi, Miklós Antal
BACKGROUND: All known biological functions of the pro-inflammatory cytokine interleukin-1β (IL-1β) are mediated by type 1 interleukin receptor (IL-1R1). IL-1β-IL-1R1 signaling modulates various neuronal functions including spinal pain processing. Although the role of IL-1β in pain processing is generally accepted, there is a discussion in the literature whether IL-1β exerts its effect on spinal pain processing by activating neuronal or glial IL-1R1. To contribute to this debate, here we investigated the expression and cellular distribution of IL-1R1 in the superficial spinal dorsal horn in control animals and also in inflammatory pain...
June 23, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28642283/selective-inhibition-of-trigeminovascular-neurons-by-fremanezumab-a-humanized-monoclonal-anti-cgrp-antibody
#4
Agustin Melo-Carrillo, Rodrigo Noseda, Rony Nir, Aaron Schain, Jennifer Stratton, Andrew M Strassman, Rami Burstein
A large body of evidence supports an important role for CGRP in migraine pathophysiology. This evidence gave rise to a global effort to develop a new generation of therapeutics that inhibit the interaction of CGRP with its receptor in migraineurs. Recently, a new class of such drugs, humanized monoclonal anti-CGRP antibodies (CGRP-mAb) were found to be effective in reducing the frequency of migraine. The purpose of this study was to better understand how the CGRP-mAb fremanezumab (TEV-48125) modulates meningeal sensory pathways...
June 22, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28638341/herbal-medicine-ac591-prevents-oxaliplatin-induced-peripheral-neuropathy-in-animal-model-and-cancer-patients
#5
Xiaolan Cheng, Jiege Huo, Dawei Wang, Xueting Cai, Xiaoyan Sun, Wuguang Lu, Yang Yang, Chunping Hu, Xiaoning Wang, Peng Cao
Oxaliplatin is clinically compelling because of severe peripheral neuropathy. The side effect can result in dosage reductions or even cessation of chemotherapy, and no effective treatments are available. AC591 is a standardized extract of Huangqi Guizhi Wuwu decoction, an herbal formula recorded in "Synopsis of the Golden Chamber" for improving limb numbness and pain. In this study, we investigated whether AC591 could protect against oxaliplatin-induced peripheral neuropathy. To clarify it, a rat model of oxaliplatin-induced peripheral neuropathy was established, and neuroprotective effect of AC591 was studied...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28636927/noxious-but-not-innocuous-thermal-stimuli-evoke-perk-expression-in-dorsal-horn-neurons-after-spared-nerve-injury-in-adult-rats
#6
Mohamad S Samour, Sumaiya M Shaikh, David A Mahns, Peter J Shortland
Noxious stimulation of sensory afferents evokes phosphorylated extracellular signal regulated kinase (pERK) expression in spinal cord neurons. This study investigated the expression of pERK in the dorsal horn neurons in response to innocuous and noxious cold stimuli in naïve versus spared nerve injury (SNI) rats. Noxious cold or hot stimuli (0 or 45°C) elicited pERK expression in laminae I-II whereas cooling stimuli from 32°C to 25, 15 or 5°C produced no or little pERK expression in dorsal horn neurons...
June 19, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28632555/changes-in-cytokines-sensory-tests-and-self-reported-pain-levels-after-manual-treatment-of-low-back-pain
#7
Brian F Degenhardt, Jane C Johnson, Christian Fossum, Chad T Andicochea, Melissa K Stuart
STUDY DESIGN: Unbalanced 3-factor design with repeated measures on 1 factor. OBJECTIVE: To determine the effect of manual treatment (MT) on cytokine and pain sensations in those with and without low back pain (LBP). SUMMARY OF BACKGROUND DATA: Evidence suggests that MT reduces LBP but by unknown mechanisms. Certain cytokines have been elevated in patients with LBP and may be affected by MT. METHODS: Participants aged 20-60 years with chronic LBP or without LBP were recruited and randomly assigned to MT, sham ultrasound treatment, or no treatment groups...
July 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28629826/silencing-of-fkbp51-alleviates-the-mechanical-pain-threshold-inhibits-drg-inflammatory-factors-and-pain-mediators-through-the-nf-kappab-signaling-pathway
#8
Hong-Mei Yu, Qi Wang, Wen-Bo Sun
Neuropathic pain is chronic pain caused by lesions or diseases of the somatosensory system, currently available analgesics provide only temporal relief. The precise role of FK506 binding protein 51 (FKBP51) in neuropathic pain induced by chronic constriction injury (CCI) is not clear. The purpose of the present study was to investigate the effects and possible mechanisms of FKBP51 in neuropathic pain in the rat model of CCI. Our results showed that FKBP51 was obviously upregulated in a time-dependent manner in the dorsal root ganglion (DRG) in CCI rats...
June 16, 2017: Gene
https://www.readbyqxmd.com/read/28628851/spinal-5-ht4-and-5-ht6-receptors-contribute-to-the-maintenance-of-neuropathic-pain-in-rats
#9
Jorge Baruch Pineda-Farias, Paulino Barragán-Iglesias, Alann Valdivieso-Sánchez, Juan Rodríguez-Silverio, Francisco Javier Flores-Murrieta, Vinicio Granados-Soto, Héctor Isaac Rocha-González
BACKGROUND: Nerve injury promotes release of 5-HT at the spinal cord. Once released, 5-HT may produce antinociceptive or pronociceptive effects depending of the nature of 5-HT receptors. The purpose of this study was to investigate the participation of spinal 5-HT4 and 5-HT6 receptors in the maintenance of neuropathic pain in rats. METHODS: Tactile allodynia was measured using von Frey hairs in male Wistar rats subjected to L5-L6 spinal nerve injury. Selective 5-HT4 (GR-113808, 0...
April 4, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28627714/migraine-subclassification-via-a-data-driven-automated-approach-using-multimodality-factor-mixture-modeling-of-brain-structure-measurements
#10
Todd J Schwedt, Bing Si, Jing Li, Teresa Wu, Catherine D Chong
BACKGROUND: The current subclassification of migraine is according to headache frequency and aura status. The variability in migraine symptoms, disease course, and response to treatment suggest the presence of additional heterogeneity or subclasses within migraine. OBJECTIVE: The study objective was to subclassify migraine via a data-driven approach, identifying latent factors by jointly exploiting multiple sets of brain structural features obtained via magnetic resonance imaging (MRI)...
June 19, 2017: Headache
https://www.readbyqxmd.com/read/28627589/effect-of-the-spinal-apelin%C3%A2-apj-system-on-the-pathogenesis-of-chronic-constriction-injury%C3%A2-induced-neuropathic-pain-in-rats
#11
Qingming Xiong, Wanyou He, Hanbing Wang, Jun Zhou, Yajun Zhang, Jian He, Chengxiang Yang, Bin Zhang
Apelin is hypothesized to serve a dual function in pain processing. Spinal administration of apelin induces hyperalgesia, while opioid receptors are implicated in the antinociceptive effects of apelin in acute nociceptive models. However, whether the apelin‑apelin receptor (APJ) system is involved in neuropathic pain remains to be elucidated. The present study aimed to evaluate the impact and mechanism of the spinal apelin‑APJ system in neuropathic pain. Chronic constriction injury (CCI) of the sciatic nerve produced sustained spinal apelin and APJ upregulation, which was associated with mechanical allodynia and heat hyperalgesia development in the hind‑paw plantar surface...
June 9, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28626198/the-therapeutic-effect-of-dexmedetomidine-on-rat-diabetic-neuropathy-pain-and-the-mechanism
#12
Yuecheng Lu, Baohua Lin, Junmin Zhong
Diabetic neuropathy pain (DNP) is a common chronic complication of diabetes characterized by spontaneous pain, hyperalgesia and allodynia. Dexmedetomidine is a selective α2 adrenergic agonist that relieves sympathetic nervous tension and reduces the release of glutamate. Thus, it is possible that dexmedetomidine may relieve DNP as well. In this study, we examined the effect of dexmedetomidine on DNP in the presence or absence of the α2 adrenergic antagonist yohimbine in rats utilizing a streptozotocin (STZ)-induced diabetes as a model of DNP...
June 14, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28623271/decoy-peptide-targeted-to-toll-il-1r-domain-inhibits-lps-and-tlr4-active-metabolite-morphine-3-glucuronide-sensitization-of-sensory-neurons
#13
Yohance M Allette, Youngsook Kim, Aaron L Randolph, Jared A Smith, Matthew S Ripsch, Fletcher A White
Accumulating evidence indicates that Toll-like receptor (TLR) signaling adapter protein interactions with Toll/Interleukin-1 Receptor (TIR) domains present in sensory neurons may modulate neuropathic pain states. Following ligand interaction with TLRs, TIR serves to both initiate intracellular signaling and facilitate recruitment of signaling adapter proteins to the intracytoplasmic domain. Although TLR TIR is central to a number of TLR signaling cascades, its role in sensory neurons is poorly understood. In this study we investigated the degree to which TLR TIR decoy peptide modified to include a TAT sequence (Trans-Activator of Transcription gene in HIV; TAT-4BB) affected LPS-induced intracellular calcium flux and excitation in sensory neurons, and behavioral changes due to TLR4 active metabolite, morphine-3-glucuronide (M3G) exposure in vivo...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28618070/morin-suppresses-astrocyte-activation-and-regulates-cytokine-release-in-bone-cancer-pain-rat-models
#14
Wei Jiang, Ying Wang, Wei Sun, Mengyuan Zhang
As inflammatory and immune responses are involved in pathophysiology of debilitating neuropathic pain, reagents that can modulate these two responses may have therapeutic potential. Morin, derived from the moraceae family of plants, benefits inflammation-related diseases, but its antinociceptive effects on cancer pain remain elusive. In the present study, we investigated antinociceptive effects of morin on bone cancer pain using a rat model, where rats were subject to implantation of Walker 256 mammary gland carcinoma cells into the tibia...
June 15, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28617705/liver-x-receptor-%C3%AE-is-involved-in-counteracting-mechanical-allodynia-by-inhibiting-neuroinflammation-in-the-spinal-dorsal-horn
#15
Jing Xu, Yi-Wei Feng, Ling Liu, Wei Wang, Xiong-Xiong Zhong, Xu-Hong Wei, Xian-Guo Liu
BACKGROUND: Liver X receptors, including α and β isoforms, are ligand-activated transcription factors. Whether liver X receptor α plays a role in neuropathic pain is unknown. METHODS: A spared nerve injury model was established in adult male rats and mice. Von Frey tests were performed to evaluate the neuropathic pain behavior; Western blot and immunohistochemistry were performed to understand the underlying mechanisms. RESULTS: Intrathecal injection of a specific liver X receptor agonist T0901317 or GW3965 could either prevent the development of mechanical allodynia or alleviate the established mechanical allodynia, both in rats and wild-type mice...
June 15, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28616038/electroacupuncture-at-fengchi-gb20-inhibits-calcitonin-gene-related-peptide-expression-in-the-trigeminovascular-system-of-a-rat-model-of-migraine
#16
Luo-Peng Zhao, Lu Liu, Pei Pei, Zheng-Yang Qu, Yu-Pu Zhu, Lin-Peng Wang
Most migraine patients suffer from cutaneous allodynia; however, the underlying mechanisms are unclear. Calcitonin gene-related peptide (CGRP) plays an important role in the pathophysiology of migraine, and it is therefore, a potential therapeutic target for treating the pain. In the present study, a rat model of conscious migraine, induced by repeated electrical stimulation of the superior sagittal sinus, was established and treated with electroacupuncture at Fengchi (GB20) (depth of 2-3 mm, frequency of 2/15 Hz, intensity of 0...
May 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28615426/modulation-of-intrinsic-resting-state-fmri-networks-in-women-with-chronic-migraine
#17
X Michelle Androulakis, Kaitlin Krebs, B Lee Peterlin, Tianming Zhang, Nasim Maleki, Souvik Sen, Chris Rorden, Priyantha Herath
OBJECTIVE: To evaluate the intrinsic resting functional connectivity of the default mode network (DMN), salience network (SN), and central executive network (CEN) network in women with chronic migraine (CM), and whether clinical features are associated with such abnormalities. METHODS: We analyzed resting-state connectivity in 29 women with CM as compared to age- and sex-matched controls. Relationships between clinical characteristics and changes in targeted networks connectivity were evaluated using a multivariate linear regression model...
June 14, 2017: Neurology
https://www.readbyqxmd.com/read/28615337/accumulation-of-methylglyoxal-increases-the-advanced-glycation-end-products-levels-in-drg-and-contributes-to-lumbar-disc-herniation-induced-persistent-pain
#18
Cui-Cui Liu, Xin-Sheng Zhang, Yu-Ting Ruan, Zhu-Xi Huang, Su-Bo Zhang, Meng Liu, Hai-Jie Luo, Shao-Ling Wu, Chao Ma
Lumbar disc herniation (LDH) with discogenic low back pain and sciatica is a common and complicated musculoskeletal disorder. The underlying mechanisms are poorly understood and there are no effective therapies for LDH-induced pain. In the present study, we found that the patients who suffered from LDH-induced pain had elevated plasma methylglyoxal (MG) levels. In rats, implantation of autologous nucleus pulposus (NP) to the left lumbar 5 spinal nerve root, which mimicked LDH, induced mechanical allodynia and increased MG level in plasma and dorsal root ganglion (DRG) and enhanced the excitability of small DRG neurons (< 30μm in diameter)...
June 14, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28614825/effect-of-ceftiofur-on-hyperalgesia-and-allodynia-in-a-rat-neuropathic-pain-model-the-role-of-immune-processes
#19
Aytül Önal, Deniz Coşkunsever, Fatma Gül Çelenk, Recep Selim Şentürk, Selvi Nalbant, Sibel Ülker Göksel
OBJECTIVE: Inflammatory and immune mechanisms play important roles in the pathogenesis of neuropathic pain. Ceftiofur, a third-generation cephalosporin, has anti-inflammatory effects by inhibiting tumor necrosis factor (TNF)-α, interleukin (IL)-1β, nuclear factor (NF)-κB, and mitogen-activated protein kinase (MAPK) signaling. This study aimed to investigate the effect of ceftiofur on hyperalgesia and allodynia in neuropathic rats and to define the possible contribution of immune mechanisms to this effect...
June 15, 2017: Neuroimmunomodulation
https://www.readbyqxmd.com/read/28614189/a-dose-response-study-of-topical-allyl-isothiocyanate-mustard-oil-as-human-surrogate-model-of-pain-hyperalgesia-and-neurogenic-inflammation
#20
H H Andersen, S Lo Vecchio, P Gazerani, L Arendt-Nielsen
Despite being a ubiquitous animal pain model, the natural TRPA1-agonist allyl-isothiocyanate (AITC, also known as "mustard oil") has only been sparsely investigated as a potential human surrogate model of pain, sensitization, and neurogenic inflammation. Its dose-response as an algogenic, sensitizing irritant remains to be elucidated in human skin. Three concentrations of AITC (10%, 50%, 90%) and vehicle (paraffin) were applied for 5 min to 3x3 cm areas on the volar forearms in 14 healthy volunteers, and evoked pain intensity (visual analog scale 0-100 mm) and pain quality were assessed...
June 9, 2017: Pain
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