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Dorsal root ganglion

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https://www.readbyqxmd.com/read/29333099/pulsed-radiofrequency-applied-to-the-sciatic-nerve-improves-neuropathic-pain-by-down-regulating-the-expression-of-calcitonin-gene-related-peptide-in-the-dorsal-root-ganglion
#1
Hao Ren, Hailong Jin, Zipu Jia, Nan Ji, Fang Luo
Background: Clinical studies have shown that applying pulsed radiofrequency (PRF) to the neural stem could relieve neuropathic pain (NP), albeit through an unclear analgesic mechanism. And animal experiments have indicated that calcitonin gene-related peptide (CGRP) expressed in the dorsal root ganglion (DRG) is involved in generating and maintaining NP. In this case, it is uncertain whether PRF plays an analgesic role by affecting CGRP expression in DRG. Methods: Rats were randomly divided into four groups: Groups A, B, C, and D...
2018: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/29332300/long-term-exposure-to-cell-phone-frequencies-900-and-1800%C3%A2-mhz-induces-apoptosis-mitochondrial-oxidative-stress-and-trpv1-channel-activation-in-the-hippocampus-and-dorsal-root-ganglion-of-rats
#2
Kemal Ertilav, Fuat Uslusoy, Serdar Ataizi, Mustafa Nazıroğlu
Mobile phone providers use electromagnetic radiation (EMR) with frequencies ranging from 900 to 1800 MHz. The increasing use of mobile phones has been accompanied by several potentially pathological consequences, such as neurological diseases related to hippocampal (HIPPON) and dorsal root ganglion neuron (DRGN). The TRPV1 channel is activated different stimuli, including CapN, high temperature and oxidative stress. We investigated the contribution TRPV1 to mitochondrial oxidative stress and apoptosis in HIPPON and DRGN following long term exposure to 900 and 1800 MHz in a rat model...
January 13, 2018: Metabolic Brain Disease
https://www.readbyqxmd.com/read/29331040/jun-gal-cd74-and-c1qb-as-potential-indicator-for-neuropathic-pain
#3
Ji-An Yang, Jun-Min He, Jing-Min Lu, Li-Juan Ji
Neuropathic pain is a kind of pain caused by primary or secondary impairment or dysfunction of peripheral or central nervous system. Patients with neuropathic pain were often with poor clinical outcome. We screened the differentially expressed genes between sciatic nerve injury and dorsal root ganglion gene in the sham operation model. Microarray and the spared nerve injury module were used to explore the molecular mechanism of neuropathic pain by injuries and the differentially expressed genes (DEGs) were identified out...
January 13, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29329586/il-33-st2-signaling-contributes-to-radicular-pain-by-modulating-mapk-and-nf-%C3%AE%C2%BAb-activation-and-inflammatory-mediator-expression-in-the-spinal-cord-in-rat-models-of-noncompressive-lumber-disk-herniation
#4
Si-Jian Huang, Jian-Qin Yan, Hui Luo, Lu-Yao Zhou, Jian-Gang Luo
BACKGROUND: Immune and inflammatory responses occurring in the spinal cord play a pivotal role in the progression of radicular pain caused by intervertebral disk herniation. Interleukin-33 (IL-33) orchestrates inflammatory responses in a wide range of inflammatory and autoimmune disorders of the nervous system. Thus, the purpose of this study is to investigate the expression of IL-33 and its receptor ST2 in the dorsal spinal cord and to elucidate whether the inhibition of spinal IL-33 expression significantly attenuates pain-related behaviors in rat models of noncompressive lumbar disc herniation...
January 12, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29327452/regenerative-effects-of-human-embryonic-stem-cell-derived-neural-crest-cells-for-treatment-of-peripheral-nerve-injury
#5
Iwan Jones, Liudmila N Novikova, Lev N Novikov, Monika Renardy, Andreas Ullrich, Mikael Wiberg, Leif Carlsson, Paul J Kingham
Surgical intervention is the current gold standard treatment following peripheral nerve injury. However, this approach has limitations and full recovery of both motor and sensory modalities often remains incomplete. The development of artificial nerve grafts that either complement or replace current surgical procedures is therefore of paramount importance. An essential component of artificial grafts are biodegradable conduits and transplanted cells that provide trophic support during the regenerative process...
January 12, 2018: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29323028/surgical-reconstruction-of-spinal-cord-circuit-provides-functional-return-in-humans
#6
REVIEW
Thomas Carlstedt, Nicholas James, Mårten Risling
This mini review describes the current surgical strategy for restoring function after traumatic spinal nerve root avulsion in brachial or lumbosacral plexus injury in man. As this lesion is a spinal cord or central nervous injury functional return depends on spinal cord nerve cell growth within the central nervous system. Basic science, clinical research and human application has demonstrated good and useful motor function after ventral root avulsion followed by spinal cord reimplantation. Recently, sensory return could be demonstrated following spinal cord surgery bypassing the injured primary sensory neuron...
December 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/29320757/expression-of-hneuritn-protein-in-a-baculovirus-expression-system-and-the-analysis-of-its-activity
#7
Shuai Zhang, Yanhong Huang, Jingling Zhu, Liya Shan, Jianfeng Gao, Yunhua Zhang, Na Yu, Lei Yang, Jin Huang
Neuritin plays an important role in the development and regeneration of the nervous system, and shows good prospects in the treatment and protection of the nervous system. To characterize neuritin function, we constructed a baculovirus expression system of neuritin, and identified the biological activity of the neuritin protein. The results and showed that the expression product could promote the neurite growth of dorsal root ganglion in chicken embryos. The neuritin open reading frame was amplified and cloned into the plasmid pFastBac™HTA...
January 7, 2018: Gene
https://www.readbyqxmd.com/read/29317362/lumbar-dorsal-root-ganglion-block-as-a-prognostic-tool-prior-to-pulsed-radiofrequency-a-randomized-prospective-and-comparative-study-on-cost-effectiveness
#8
Cheng-Chia Lee, Ching-Jen Chen, Chien-Chen Chou, Hsin-Yi Wang, Wen-Yuh Chung, Giia-Sheun Peng, Ching-Po Lin
OBJECTIVES: In the study, we discuss the predictive value and cost-effectiveness of dorsal root ganglion (DRG) blocks prior to using dorsal root ganglion pulsed radiofrequency (DRG-PRF) in the treatment of low back pain. METHODS: The study comprised 60 patients with low back pain who were randomly assigned into two groups. Patients in Group 1 were screened using DRG block prior to DRG-PRF treatment for responders. Patients in Group 2 underwent DRG-PRF treatment without DRG block...
January 6, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29310667/wwl70-protects-against-chronic-constriction-injury-induced-neuropathic-pain-in-mice-by-cannabinoid-receptor-independent-mechanisms
#9
Jie Wen, Melissa Jones, Mikiei Tanaka, Prabhuanand Selvaraj, Aviva J Symes, Brian Cox, Yumin Zhang
BACKGROUND: Targeting the endocannabinoid system has emerged as an effective strategy for the treatment of inflammatory and neurological diseases. Unlike the inhibition of the principal 2-arachidonyl glycerol (2-AG) hydrolytic enzyme monoacylglycerol lipase (MAGL), which leads to 2-AG overload and cannabinoid receptor desensitization, selective inhibition of the minor 2-AG hydrolytic enzyme alpha, beta-hydrolase domain 6 (ABHD6) can provide therapeutic benefits without producing cannabimimetic side effects...
January 8, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29304162/adrenergic-receptors-inhibit-trpv1-activity-in-the-dorsal-root-ganglion-neurons-of-rats
#10
Yumi Matsushita, Miki Manabe, Naoki Kitamura, Izumi Shibuya
Transient receptor potential vanilloid type 1 (TRPV1) is a polymodal receptor channel that responds to multiple types of stimuli, such as heat, acid, mechanical pressure and some vanilloids. Capsaicin is the most commonly used vanilloid to stimulate TRPV1. TRPV1 channels are expressed in dorsal root ganglion neurons that extend to Aδ- and C-fibers and have a role in the transduction of noxious inputs to the skin into the electrical signals of the sensory nerve. Although noradrenergic nervous systems, including the descending antinociceptive system and the sympathetic nervous system, are known to modulate pain sensation, the functional association between TRPV1 and noradrenaline in primary sensory neurons has rarely been examined...
2018: PloS One
https://www.readbyqxmd.com/read/29303989/characterization-of-different-types-of-excitability-in-large-somatosensory-neurons-and-its-plastic-changes-in-pathological-pain-states
#11
Rou-Gang Xie, Wen-Guang Chu, San-Jue Hu, Ceng Luo
Sensory neuron types have been distinguished by distinct morphological and transcriptional characteristics. Excitability is the most fundamental functional feature of neurons. Mathematical models described by Hodgkin have revealed three types of neuronal excitability based on the relationship between firing frequency and applied current intensity. However, whether natural sensory neurons display different functional characteristics in terms of excitability and whether this excitability type undergoes plastic changes under pathological pain states have remained elusive...
January 5, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29291392/urothelial-bladder-afferent-neurons-in-the-rat-are-anatomically-and-neurochemically-distinct-from-non-urothelial-afferents
#12
Buffie J Clodfelder-Miller, Hirosato Kanda, Jianguo G Gu, Judy R Creighton, Timothy J Ness, Jennifer J DeBerry
There is mounting evidence underscoring a role for the urothelium in urinary bladder sensation. Previous functional studies have identified bladder primary afferents with mechanosensitive properties suggesting urothelial innervation and/or communication. The current study identifies a group of urothelium-innervating afferent neurons in rat, and characterizes and compares the properties of these and non-urothelial afferent neuron populations. Lumbosacral (LS) primary afferent neurons were retrogradely labeled using intraparenchymal (IPar) microinjection or intravesical (IVes) infusion of tracer into the bladder...
December 29, 2017: Brain Research
https://www.readbyqxmd.com/read/29286468/analysis-of-immune-cells-in-single-sciatic-nerves-and-dorsal-root-ganglion-from-a-single-mouse-using-flow-cytometry
#13
Asa S Hidmark, Peter P Nawroth, Thomas Fleming
Nerve-resident immune cells in the peripheral nervous system (PNS) are essential to maintaining neuronal integrity in a healthy nerve. The immune cells of the PNS are affected by injury and disease, affecting the nerve function and the capacity for regeneration. Neuronal immune cells are commonly analyzed by immunofluorescence (IF). While IF is essential for determining the location of the immune cells in the nerve, IF is only semi-quantitative and the method is limited to the number of markers that can be analyzed simultaneously and the degree of surface expression...
December 6, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29282769/glial-m6b-stabilizes-the-axonal-membrane-at-peripheral-nodes-of-ranvier
#14
Marie L Bang, Anya Vainshtein, Hyun-Jeong Yang, Yael Eshed-Eisenbach, Jerome Devaux, Hauke B Werner, Elior Peles
Glycoprotein M6B and the closely related proteolipid protein regulate oligodendrocyte myelination in the central nervous system, but their role in the peripheral nervous system is less clear. Here we report that M6B is located at nodes of Ranvier in peripheral nerves where it stabilizes the nodal axolemma. We show that M6B is co-localized and associates with gliomedin at Schwann cell microvilli that are attached to the nodes. Developmental analysis of sciatic nerves, as well as of myelinating Schwann cells/dorsal root ganglion neurons cultures, revealed that M6B is already present at heminodes, which are considered the precursors of mature nodes of Ranvier...
December 28, 2017: Glia
https://www.readbyqxmd.com/read/29274843/oxaliplatin-induced-changes-in-expression-of-transient-receptor-potential-channels-in-the-dorsal-root-ganglion-as-a-neuropathic-mechanism-for-cold-hypersensitivity
#15
Akiko Chukyo, Terumasa Chiba, Toshie Kambe, Ken Yamamoto, Kazuyoshi Kawakami, Kyoji Taguchi, Kenji Abe
Transient receptor potential (TRP) receptors are involved in the development of chemotherapy-induced peripheral neuropathic pain, which is a common side effect of selected chemotherapeutic agents such as oxaliplatin. However, the precise contribution of TRPs to this condition remains unknown. Cold hypersensitivity is the hallmark of oxaliplatin-induced neuropathy, so we used a preclinical model of oxaliplatin-induced cold hypersensitivity in rats to determine the effects of oxaliplatin on TRP channels. To this end, immunohistochemistry was used to examine TRP vanilloid 1 (TRPV1), TRP ankyrin 1 (TRPA1), and TRP melastatin 8 (TRPM8) expression in the rat dorsal root ganglion (DRG) after 4days of oxaliplatin treatment...
December 15, 2017: Neuropeptides
https://www.readbyqxmd.com/read/29273526/activation-of-the-capsaicin-receptor-trpv1-by-the-acetaminophen-metabolite-n-arachidonoylaminophenol-results-in-cytotoxicity
#16
Thomas Stueber, Susanne Meyer, Annette Jangra, Axel Hage, Mirjam Eberhardt, Andreas Leffler
AIMS: The anandamide reuptake inhibitor N-arachidonoylaminophenol (AM404) and the reactive substance N-acetyl-p-benzoquinone imine (NAPQI) are both metabolites of acetaminophen and may contribute to acetaminophen-induced analgesia by acting at TRPV1 expressed in the peripheral or central nervous system. While NAPQI slowly sensitizes and activates TRPV1 by interacting with distinct intracellular cysteine residues, detailed properties of AM404 as an agonist of TRPV1 have not yet been reported on...
December 19, 2017: Life Sciences
https://www.readbyqxmd.com/read/29273519/adenosine-monophosphate-activated-protein-kinase-modulation-by-berberine-attenuates-mitochondrial-deficits-and-redox-imbalance-in-experimental-diabetic-neuropathy
#17
Veera Ganesh Yerra, Anil Kumar Kalvala, Bhoomika Sherkhane, Aparna Areti, Ashutosh Kumar
Adenosine monophosphate activated protein kinase (AMPK) has been studied for its myriad metabolic and mitochondrial benefits in several chronic diseases. Recent studies have uncovered its therapeutic potential against mitochondrial dysfunction in cultured dorsal root ganglion (DRG) neurons isolated from streptozotocin (STZ) induced diabetic rats. The present study is aimed at evaluating the pharmacological efficacy of berberine (BRB), a natural AMPK activator against experimental diabetic neuropathy (DN) phenotype developed in STZ (55 mg/kg, i...
December 19, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29273263/optocapacitive-generation-of-action-potentials-by-microsecond-laser-pulses-of-nanojoule-energy
#18
João L Carvalho-de-Souza, Bernardo I Pinto, David R Pepperberg, Francisco Bezanilla
Millisecond pulses of laser light delivered to gold nanoparticles residing in close proximity to the surface membrane of neurons can induce membrane depolarization and initiate an action potential. An optocapacitance mechanism proposed as the basis of this effect posits that the membrane-interfaced particle photothermally induces a cell-depolarizing capacitive current, and predicts that delivering a given laser pulse energy within a shorter period should increase the pulse's action-potential-generating effectiveness by increasing the magnitude of this capacitive current...
December 19, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/29260523/-the-role-of-long-chain-non-coding-rna-paupar-in-the-process-of-bupivacaine-induced-neurotoxicity
#19
Li-Liang Zhang, Li-Na Qi, Ze-Yu Yao
OBJECTIVE: To observe the expression mode and modulation effects of lncRNA-Paupar in the process of bupivacaine induced neurotoxicity. METHODS: Dorsal root ganglion (DRG) neurons were cultured and neurotoxicity model was produced on it. And the expression of lncRNA-Paupar was evaluated by qRT-PCR. Lnc-Paupar specific siRNA-P and random control group siRNA-C were constructed,200 nmol/L siRNA-P,siRNA-C were transfected into ganglion cells and the apoptosis rate of transfected cells were observed by TUNEL method...
November 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/29249972/pathophysiological-role-of-transient-receptor-potential-ankyrin-1-in-a-mouse-long-lasting-cystitis-model-induced-by-an-intravesical-injection-of-hydrogen-peroxide
#20
Shohei Oyama, Koji Dogishi, Mizuki Kodera, Masashi Kakae, Kazuki Nagayasu, Hisashi Shirakawa, Takayuki Nakagawa, Shuji Kaneko
Chronic inflammatory bladder disorders, such as interstitial cystitis/bladder pain syndrome, are associated with poor quality of life. The exact pathological processes remain unclear, but accumulating evidence suggests that reactive oxidative species (ROS) are involved in urinary bladder disorders. Transient receptor potential ankyrin 1 (TRPA1), the most sensitive TRP channel to ROS, was shown to be responsible for urinary bladder abnormalities and hyperalgesia in an acute cystitis model. However, the roles of TRPA1 in chronic inflammatory bladder are not fully understood...
2017: Frontiers in Physiology
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