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Spinal modulation

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https://www.readbyqxmd.com/read/29245067/lin28a-functionally-modulates-bupivacaine-induced-dorsal-root-ganglion-neuron-apoptosis-through-trka-activation
#1
Liangsheng Yu, Yuanxu Jiang, Bin Tang
PURPOSE: Lin-28 Homolog A gene (Lin28a) is an important regulator in nerve system. In this study, we investigated the functional mechanism of Lin28a during the process of bupivacaine (BUP)-induced neuronal apoptosis of spinal cord dorsal root ganglion neurons (DRGNs). METHODS: Young mouse DRGNs were cultured in vitro and treated with series concentrations of BUP. Apoptosis was evaluated by TUNEL assay. Corresponding Lin28a mRNA and protein expressions were evaluated by qRT-PCR and western blot (WB) assays...
December 12, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29244850/intensity-matters-therapist-dependent-dose-of-spinal-transcutaneous-electrical-nerve-stimulation
#2
Diego Serrano-Muñoz, Julio Gómez-Soriano, Elisabeth Bravo-Esteban, María Vázquez-Fariñas, Julian Taylor, Juan Avendaño-Coy
The intensity used during transcutaneous electrical nerve stimulation (TENS) in both, clinical practice and research studies, is often based on subjective commands such as "strong but comfortable sensation". There is no consensus regarding the effectiveness dose of TENS. The objective was to determine the difference in the effect of spinal TENS on soleus H-reflex modulation when applied by two therapists instructed to apply the stimulation at a "strong but comfortable" intensity. Twenty healthy volunteers divided into two groups: Therapist 1 (n = 10) and Therapist 2 (n = 10)...
2017: PloS One
https://www.readbyqxmd.com/read/29244816/treatment-with-albumin-hydroxyoleic-acid-complex-restores-sensorimotor-function-in-rats-with-spinal-cord-injury-efficacy-and-gene-expression-regulation
#3
Gerardo Avila-Martin, Manuel Mata-Roig, Iriana Galán-Arriero, Julian S Taylor, Xavier Busquets, Pablo V Escribá
Sensorimotor dysfunction following incomplete spinal cord injury (SCI) is often characterized by paralysis, spasticity and pain. Previously, we showed that intrathecal (i.t.) administration of the albumin-oleic acid (A-OA) complex in rats with SCI produced partial improvement of these symptoms and that oral 2-hydroxyoleic acid (HOA, a non-hydrolyzable OA analogue), was efficacious in the modulation and treatment of nociception and pain-related anxiety, respectively. Here we observed that intrathecal treatment with the complex albumin-HOA (A-HOA) every 3 days following T9 spinal contusion injury improved locomotor function assessed with the Rotarod and inhibited TA noxious reflex activity in Wistar rats...
2017: PloS One
https://www.readbyqxmd.com/read/29241656/adipose-derived-stem-cells-decrease-pain-in-a-rat-model-of-oxaliplatin-induced-neuropathy-role-of-vegf-a-modulation
#4
Lorenzo Di Cesare Mannelli, Barbara Tenci, Laura Micheli, Alessia Vona, Francesca Corti, Matteo Zanardelli, Andrea Lapucci, Ann Maria Clemente, Paola Failli, Carla Ghelardini
Oxaliplatin therapy of colorectal cancer induces a dose-dependent neuropathic syndrome in 50% of patients. Pharmacological treatments may offer limited relief; scientific efforts are needed for new therapeutic approaches. Therefore we evaluated in a preclinical setting the pain relieving properties of mesenchymal stem cells and its secretome. Rat adipose stem cells (rASCs) were administered in a rat model of oxaliplatin-induced neuropathy. A single intravenous injection of rASCs reduced oxaliplatin-dependent mechanical hypersensitivity to noxious and non-noxious stimuli taking effect 1 h after administration, peaking 6 h thereafter and lasting 5 days...
December 11, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29230425/neuroprotective-potential-of-gentongping-in-rat-model-of-cervical-spondylotic-radiculopathy-targeting-ppar-%C3%AE-pathway
#5
Wen Sun, Kang Zheng, Bin Liu, Danping Fan, Hui Luo, Xiaoyuan Qu, Li Li, Xiaojuan He, Jianfeng Yi, Cheng Lu
Cervical spondylotic radiculopathy (CSR) is the most general form of spinal degenerative disease and is characterized by pain and numbness of the neck and arm. Gentongping (GTP) granule, as a classical Chinese patent medicine, has been widely used in curing CSR, whereas the underlying mechanism remains unclear. Therefore, the aim of this study is to explore the pharmacological mechanisms of GTP on CSR. The rat model of CSR was induced by spinal cord injury (SCI). Our results showed that GTP could significantly alleviate spontaneous pain as well as ameliorate gait...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/29229703/orai1-plays-a-crucial-role-in-central-sensitization-by-modulating-neuronal-excitability
#6
Yannong Dou, Jingsheng Xia, Ruby Gao, Xinghua Gao, Frances M Munoz, Dongyu Wei, Yuzhen Tian, James E Barrett, Seena Ajit, Olimpia Meucci, James W Putney, Yue Dai, Huijuan Hu
Pathological pain is a common and debilitating condition that is often poorly managed. Central sensitization is an important mechanism underlying pathological pain. However, candidate molecules involved in central sensitization remain unclear. Store-operated calcium channels (SOCs) mediate important calcium signals in non-excitable and excitable cells. SOCs have been implicated in a wide variety of human pathophysiological conditions including immunodeficiency, occlusive vascular diseases and cancer. However, the role of SOCs in central nervous system (CNS) disorders has been relatively unexplored...
December 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29228949/a-mathematical-model-for-histamine-synthesis-release-and-control-in-varicosities
#7
Janet Best, H F Nijhout, Srimal Samaranayake, Parastoo Hashemi, Michael Reed
BACKGROUND: Histamine (HA), a small molecule that is synthesized from the amino acid histidine, plays an important role in the immune system where it is associated with allergies, inflammation, and T-cell regulation. In the brain, histamine is stored in mast cells and other non-neuronal cells and also acts as a neurotransmitter. The histamine neuron cell bodies are in the tuberomammillary (TM) nucleus of the hypothalamus and these neurons send projections throughout the central nervous system (CNS), in particular to the cerebral cortex, amygdala, basal ganglia, hippocampus, thalamus, retina, and spinal cord...
December 12, 2017: Theoretical Biology & Medical Modelling
https://www.readbyqxmd.com/read/29225972/modulation-of-h-reflex-depression-with-paired-pulse-stimulation-in-healthy-active-humans
#8
Preeti D Oza, Shauna Dudley-Javoroski, Richard K Shields
Depression of the Hoffman reflex (H-reflex) is used to examine spinal control mechanisms during exercise, fatigue, and vibration and in response to training. H-reflex depression protocols frequently use trains of stimuli; this is time-consuming and prevents instantaneous assessment of motor neuronal excitability. The purpose of this study was to determine if paired-pulse H-reflex depression is reproducible and whether paired-pulse stimulation adequately estimates the depression induced by the more traditional ten-pulse train...
2017: Rehabilitation Research and Practice
https://www.readbyqxmd.com/read/29225214/noradrenergic-effects-in-rat-sacral-autonomic-nucleus-using-in-vitro-slice-patch-clamp-recordings
#9
Masahiro Kawatani, Nozomi Akimoto, Akihiro Yamada, Hidemasa Furue, Masahito Kawatani
Noradrenergic modulation has been frequently discussed in the context of neural activities that are related to pelvic organs. The sacral preganglionic nucleus (SPN) is a spinal nucleus containing parasympathetic preganglionic neurons that send fibers to pelvic nerves. In spite of the abundant presence of noradrenergic fibers around the SPN, the effects of noradrenaline (NA) remain obscure. To explore this issue, NA (50 μM) was applied to parasympathetic preganglionic neurons in the SPN during whole-cell patch clamp recording...
2017: Biomedical Research
https://www.readbyqxmd.com/read/29224725/ror%C3%AE-spinal-interneurons-gate-sensory-transmission-during-locomotion-to-secure-a-fluid-walking-gait
#10
Stephanie C Koch, Marta Garcia Del Barrio, Antoine Dalet, Graziana Gatto, Thomas Günther, Jingming Zhang, Barbara Seidler, Dieter Saur, Roland Schüle, Martyn Goulding
Animals depend on sensory feedback from mechanosensory afferents for the dynamic control of movement. This sensory feedback needs to be selectively modulated in a task- and context-dependent manner. Here, we show that inhibitory interneurons (INs) expressing the RORβ orphan nuclear receptor gate sensory feedback to the spinal motor system during walking and are required for the production of a fluid locomotor rhythm. Genetic manipulations that abrogate inhibitory RORβ IN function result in an ataxic gait characterized by exaggerated flexion movements and marked alterations to the step cycle...
December 5, 2017: Neuron
https://www.readbyqxmd.com/read/29222851/convergent-validity-of-the-dutch-central-sensitization-inventory-associations-with-psychophysical-pain-measures-quality-of-life-disability-and-pain-cognitions-in-patients-with-chronic-spinal-pain
#11
Jeroen Kregel, Charline Schumacher, Mieke Dolphens, Anneleen Malfliet, Dorien Goubert, Dorine Lenoir, Barbara Cagnie, Mira Meeus, I Coppieters
OBJECTIVE: Symptoms of Central Sensitization (CS) have been described in patients with chronic spinal pain (CSP). Although a gold standard to diagnose CS is lacking, psychophysical pain measures are often used. The Central Sensitization Inventory (CSI) is proposed as an alternative method and indirect tool for evaluation of CS symptomatology. The aim of the current study was to evaluate the convergent validity of the CSI by investigating the association with psychophysical pain measures and self-reported measures of current pain intensity, quality of life, disability, and catastrophizing in CSP patients...
December 8, 2017: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/29220325/direction-modulation-of-muscle-synergies-in-a-hand-reaching-task
#12
Sharon Israely, Gerry Leisman, Chay Machluf, Tal Shnitzer, Eli Carmeli
Functional tasks of the upper extremity can be executed by a variety of muscular patterns, independent of the direction, speed and load of the task. This large number of degrees of freedom imposes a significant control burden on the CNS. Previous studies suggested that the human cortex synchronizes a discrete number of neural functional units within the brainstem and spinal cord, i.e. muscle synergies, by linearly combining them to execute a great repertoire of movements. Further exploring this control mechanism, we aim to study whether a single set of muscle synergies might be generalized to express movements in different directions...
December 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29219119/density-overwrites-of-internal-tumor-volumes-in-intensity-modulated-proton-therapy-plans-for-mobile-lung-tumors
#13
Pablo Botas, Clemens Grassberger, Gregory Sharp, Harald Paganetti
The purpose of this study was to investigate Internal Tumor Volume (ITV) density overwrite strategies to minimize Intensity Modulated Proton Therapy (IMPT) plan degradation of mobile lung tumors. Four planning paradigms were compared for nine lung cancer patients. IGTV and ICTV structures were defined encompassing their respective volumes in every 4DCT phase. The paradigms use different planning CT (pCT) created from the Average Intensity Projection (AIP) of the 4DCT, overwriting the density within the IGTV to account for movement...
December 8, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29217090/walking-speed-differentially-alters-spinal-loads-in-persons-with-traumatic-lower-limb-amputation
#14
Brad D Hendershot, Iman Shojaei, Julian C Acasio, Christopher L Dearth, Babak Bazrgari
Persons with lower limb amputation (LLA) perceive altered motions of the trunk/pelvis during activities of daily living as contributing factors for low back pain. When walking (at a singular speed), larger trunk motions among persons with vs. without LLA are associated with larger spinal loads; however, modulating walking speed is necessary in daily life and thus understanding the influences of walking speed on spinal loads in persons with LLA is of particular interest here. Three-dimensional trunk-pelvic kinematics, collected during level-ground walking at self-selected (SSW) and two controlled speeds (∼1...
November 28, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29215727/secreted-frizzled-related-protein-1-regulates-the-progression-of-neuropathic-pain-in-mice-following-spinal-nerve-ligation
#15
Jun Tang, Qing Ji, Li Jin, Mi Tian, Li Dong Zhang, Xiao Yu Liu
Previous studies have showed that the Wnt/β-catenin signaling pathway plays an important role in modulating neuropathic pain after sciatic nerve injury. In this study, we explored the role of secreted frizzled-related protein 1 (SFRP1), a Wnt antagonist, in neuropathic pain using a rat model following spinal nerve ligation (SNL). We found SNL-induced SFRP1 downregulation in the spinal cord. Further, the overexpression of SFRP1 via spinal injection into the spinal cord attenuated SNL-induced allodynia, hyperalgesia and neuroinflammation...
December 7, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29213246/the-influence-of-footwear-on-the-modular-organization-of-running
#16
Alessandro Santuz, Antonis Ekizos, Lars Janshen, Vasilios Baltzopoulos, Adamantios Arampatzis
For most of our history, we predominantly ran barefoot or in minimalist shoes. The advent of modern footwear, however, might have introduced alterations in the motor control of running. The present study investigated shod and barefoot running under the perspective of the modular organization of muscle activation, in order to help addressing the neurophysiological factors underlying human locomotion. On a treadmill, 20 young and healthy inexperienced barefoot runners ran shod and barefoot at preferred speed (2...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29210293/phosphatidylcholine-attenuated-docetaxel-induced-peripheral-neurotoxicity-in-rats
#17
Sung Tae Kim, Eun Jung Kyung, Jung Sook Suh, Ho Sung Lee, Jun Ho Lee, Soo In Chae, Eon Sub Park, Yoon Hee Chung, Jinhyung Bae, Tae Jin Lee, Won Mo Lee, Uy Dong Sohn, Ji Hoon Jeong
Docetaxel is a taxane chemotherapeutic agent used in the treatment of breast cancer, prostate cancer and gastric cancer, but several side effects such as peripheral neurotoxicity could occur. The present study was designed to investigate the therapeutic potential of phosphatidylcholine (PC) on docetaxel-induced peripheral neurotoxicity. Rats were randomly divided into three groups and treated for 4 weeks. Behavioral tests were conducted to measure the effects of PC on docetaxel-induced decreases in mechanical & thermal nociceptive threshold...
December 6, 2017: Drug and Chemical Toxicology
https://www.readbyqxmd.com/read/29209172/the-role-of-netrin-1-in-improving-functional-recovery-through-autophagy-stimulation-following-spinal-cord-injury-in-rats
#18
Liangjie Bai, Xifan Mei, Yanfeng Wang, Yajiang Yuan, Yunlong Bi, Gang Li, Hongyu Wang, Peng Yan, Gang Lv
Our previous findings indicated that treatment with Netrin-1 could improve functional recovery through the stimulation of autophagy, by activating the AMP-activated protein kinase/mammalian target of rapamycin (AMPK/mTOR) signaling pathway in rats following spinal cord injury (SCI). However, the underlying mechanisms were not elucidated. The purpose of this study was to investigate the underlying mechanisms by which Netrin-1 promotes autophagy and improves functional recovery after SCI. Following controlled SCI in Sprague-Dawley rats, we observed that the autophagic flux in neurons was impaired, as reflected by the accumulation of light chain 3-II (LC3-II)-positive and LC3-positive autophagosomes (APs), accompanied by the accumulation of the autophagic substrate, Sequestosome 1 (SQSTM1; also known as p62)...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29209161/electroacupuncture-attenuates-visceral-hypersensitivity-by-inhibiting-jak2-stat3-signaling-pathway-in-the-descending-pain-modulation-system
#19
Juan Wan, Yi Ding, Adnan H Tahir, Manoj K Shah, Habibullah Janyaro, Xiaojing Li, Juming Zhong, Vitaly Vodyanoy, Mingxing Ding
Electroacupuncture (EA) has been used for treating visceral hypersensitivity (VH). However, the underlying molecular mechanism remains unclear. This study was aim to testify the effect of EA on ileitis-provoked VH, and to confirm whether EA attenuates VH through Janus kinase 2 (JAK2)/signal transducers and activators of transcription 3 (STAT3) signaling pathway in the periaqueductal gray (PAG)-the rostral ventromedial medulla (RVM)-the spinal cord dorsal horn (SCDH) axis. Methods: Goats were anesthetized and laparotomized for injecting 2,4,6-trinitro-benzene-sulfonic acid (TNBS)-ethanol solution (30mg TNBS dissolved in 40% ethanol) into the ileal wall to induce VH...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29206314/inhibition-of-spinal-p38-mapk-prevents-articular-neutrophil-infiltration-in-experimental-arthritis-via-sympathetic-activation
#20
Alexandre Kanashiro, Marcelo Franchin, Gabriel Shimizu Bassi, Dênis Augusto Reis-Santana, Thiago Mattar Cunha, Fernando Queiróz Cunha, Luis Ulloa, Gerson Jonathan Rodrigues
The central nervous system controls the innate immunity by modulating efferent neuronal networks. Recently, we have reported that central brain stimulation inhibits inflammatory responses. In the present study, we investigate whether spinal p38 mitogen-activated protein kinase (MAPK) affects joint inflammation in experimental arthritis. Firstly, we observed that intra-articular administration of zymosan in mice induces the phosphorylation of the spinal cord p38 MAPK. In addition, we demonstrated that spinal p38 MAPK inhibition with intrathecal injection of SB203580, a conventional and well-characterized inhibitor, prevents knee joint neutrophil recruitment, edema formation, experimental score and cytokine production...
December 5, 2017: Fundamental & Clinical Pharmacology
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