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"Central Sensitization"

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https://www.readbyqxmd.com/read/27903159/recognition-and-treatment-of-central-sensitization-in-chronic-pain-patients-not-limited-to-specialized-care
#1
Jo Nijs, Dorien Goubert, Kelly Ickmans
Modern pain neuroscience has substantially improved our understanding of the (development of) chronic musculoskeletal pain. The time has come for orthopaedic and sports physical therapists to implement modern pain neuroscience in specialized, but definitely also in primary, care settings, including the role of central sensitization (CS) in amplifying and explaining the presence of the pain experience. Central sensitization dominates the clinical picture in a subgroup of the musculoskeletal pain population, ranging from tennis elbow over shoulder pain to osteoarthritis and whiplash...
December 2016: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/27874088/g9a-participates-in-nerve-injury-induced-kcna2-downregulation-in-primary-sensory-neurons
#2
Lingli Liang, Xiyao Gu, Jian-Yuan Zhao, Shaogen Wu, Xuerong Miao, Jifang Xiao, Kai Mo, Jun Zhang, Brianna Marie Lutz, Alex Bekker, Yuan-Xiang Tao
Nerve injury-induced downregulation of voltage-gated potassium channel subunit Kcna2 in the dorsal root ganglion (DRG) is critical for DRG neuronal excitability and neuropathic pain genesis. However, how nerve injury causes this downregulation is still elusive. Euchromatic histone-lysine N-methyltransferase 2, also known as G9a, methylates histone H3 on lysine residue 9 to predominantly produce a dynamic histone dimethylation, resulting in condensed chromatin and gene transcriptional repression. We showed here that blocking nerve injury-induced increase in G9a rescued Kcna2 mRNA and protein expression in the axotomized DRG and attenuated the development of nerve injury-induced pain hypersensitivity...
November 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27870649/the-reliability-of-disease-activity-score-in-28-joints-c-reactive-protein-might-be-overestimated-in-a-subgroup-of-rheumatoid-arthritis-patients-when-the-score-is-solely-based-on-subjective-parameters-a-cross-sectional-exploratory-study
#3
Inger Marie Jensen Hansen, Rikke Asmussen Andreasen, Mark Nam van Bui Hansen, Amir Emamifar
BACKGROUND: Disease Activity Score in 28 Joints (DAS28) is a scoring system to evaluate disease activity and treatment response in rheumatoid arthritis (RA). A DAS28 score of greater than 3.2 is a well-described limit for treatment intensification; however, the reliability of DAS28 might be overestimated. OBJECTIVE: The aim of this study was to evaluate the reliability of DAS28 in RA, especially focusing on a subgroup of patients with a DAS28 score of greater than 3...
November 19, 2016: Journal of Clinical Rheumatology: Practical Reports on Rheumatic & Musculoskeletal Diseases
https://www.readbyqxmd.com/read/27865869/erk-potentiates-p38-in-central-sensitization-induced-by-traumatic-occlusion
#4
Lei Jing, Xiao-Dong Liu, Hong-Xu Yang, Mian Zhang, Ying Wang, Li Duan, Jing Zhang, Lei Lu, Ting Yang, Dong-Mei Wang, Liang-Wei Chen, Mei-Qing Wang
This study was to investigate the role of p38 activation via ERK1/2 phosphorylation in neurons and microglia of the spinal trigeminal subnucleus caudalis (Vc) in the promotion of orofacial hyperalgesia induced by unilateral anterior crossbite (UAC) traumatic occlusion in adult rats. U0126, a p-ERK1/2 inhibitor, was injected intracisternally before UAC implant. The effects of the U0126 injection were compared to those following the injection of SB203580, a p-p38 inhibitor. Mechanical hyperalgesia was evaluated via pressure pain threshold measurements...
November 16, 2016: Neuroscience
https://www.readbyqxmd.com/read/27861839/widespread-pressure-pain-hypersensitivity-is-similar-in-women-with-frequent-episodic-and-chronic-tension-type-headache-a-blinded-case-control-study
#5
María Palacios Ceña, Matteo Castaldo, Kelun Wang, Paola Torelli, Paolo Pillastrini, César Fernández-de-Las-Peñas, Lars Arendt-Nielsen
OBJECTIVE: To investigate differences in widespread pressure pain hyperalgesia in the trigemino-cervical and extra-trigeminal (distant pain-free) regions in women with frequent episodic (FETTH) and chronic (CTTH) tension-type headache. BACKGROUND: It seems that people with tension-type headache exhibit central sensitization. No study has investigated differences between FETTH and CTTH in terms of widespread pressure pain hypersensitivity. METHODS: Forty-three women with FETTH, 42 with CTTH, and 45 women without headache diagnosis were recruited...
November 11, 2016: Headache
https://www.readbyqxmd.com/read/27861309/pilot-study-of-corneal-sensitivity-and-its-association-in-keratoconus
#6
Preeji S Mandathara, Fiona J Stapleton, Jim Kokkinakis, Mark D P Willcox
PURPOSE: To evaluate corneal sensitivity and its association with other clinical parameters in keratoconus. METHODS: Twenty-four subjects with keratoconus aged between 18 and 65 years were recruited in this cross-sectional study. Ocular symptoms, corneal topography, tear variables such as tear osmolarity, volume and lower tear meniscus height, ocular surface staining, central sensitivity threshold (CST), and corneal subepithelial nerve mapping were obtained. Association between central CST and other clinical variables was examined using the Spearman correlation coefficient...
November 16, 2016: Cornea
https://www.readbyqxmd.com/read/27856968/estrogen-induced-monocytic-response-correlates-with-temporomandibular-disorder-pain-a-case-control-study
#7
M C Ribeiro-Dasilva, R B Fillingim, S M Wallet
Temporomandibular disorders (TMD) are a set of conditions characterized by pain and dysfunction in the temporomandibular joint and muscles of mastication. These pain conditions are associated with considerable morbidity, societal costs, and reduced quality of life. The prevalence varies between 4% and 10%, with females at higher risk, and a higher prevalence occurs during reproductive years. The increased prevalence of TMD in females and low prevalence in childhood reinforce that sex hormones, like estrogen, play an important, complex role in the pathophysiology of these disorders...
November 16, 2016: Journal of Dental Research
https://www.readbyqxmd.com/read/27856287/the-inhibition-of-spinal-synaptic-plasticity-mediated-by-activation-of-amp-activated-protein-kinase-signaling-alleviates-the-acute-pain-induced-by-oxaliplatin
#8
Yun-Zhi Ling, Zhen-Yu Li, Han-Dong Ou-Yang, Chao Ma, Shao-Ling Wu, Jia-You Wei, Huan-Huan Ding, Xiao-Long Zhang, Meng Liu, Cui-Cui Liu, Zhen-Zhen Huang, Wen-Jun Xin
Our recent findings demonstrated that oxaliplatin entering CNS may directly induce spinal central sensitization, and contribute to the rapid development of CNS-related side effects including acute pain during chemotherapy. However, the mechanism is largely unclear. In the current study, we found that the amplitude of C-fiber-evoked field potentials was significantly increased and the expression of phosphorylated mammalian AMP-activated protein kinase α (AMPKα) was markedly decreased following high frequency stimulation (HFS) or single intraperitoneal injection of oxaliplatin (4mg/kg)...
November 14, 2016: Experimental Neurology
https://www.readbyqxmd.com/read/27832374/-mechanisms-of-chronification-and-potential-addiction-in-tumor-pain-comparison-with-non-tumor-pain-a-review-of-the-literature
#9
S Wirz, M Schenk, B Kleinmann, K Kieseritzky
BACKGROUND: Due to advances in oncological therapy options and increasing survival rates, the number of cancer patients with persistant pain, who are in need of analgesic therapy has increased. It has been proven that biopsychosocial mechanisms exist in patients with persistant non-cancer pain leading to chronification. Furthermore, addiction has been identified as a complication of analgesic therapy. OBJECTIVE: Can the multidimensional model of chronic pain enhancement and chronification be used for patients with cancer pain, analogue to patients with non-cancer pain? Can addiction sydromes as a result of analgesic treatment be demonstrated? MATERIAL AND METHODS: In this non-systematic review, a literature search was carried out for somatic and psychosocial chronification mechanisms in patients with cancer pain...
November 10, 2016: Der Schmerz
https://www.readbyqxmd.com/read/27826213/management-of-moderate-to-severe-chronic-low-back-pain-with-buprenorphine-buccal-film-using-novel-bioerodible-mucoadhesive-technology
#10
REVIEW
Joseph V Pergolizzi, Robert B Raffa, Charles Fleischer, Gianpietro Zampogna, Robert Taylor
With a global prevalence of ~9%-12%, low back pain (LBP) is a serious public health issue, associated with high costs for treatment and lost productivity. Chronic LBP (cLBP) involves central sensitization, a neuropathic pain component, and may induce maladaptive coping strategies and depression. Treating cLBP is challenging, and current treatment options are not fully satisfactory. A new BioErodible MucoAdhesive (BEMA(®)) delivery system for buprenorphine has been developed to treat cLBP. The buccal buprenorphine (BBUP) film developed for this product (Belbuca™) allows for rapid delivery and titration over a greater range of doses than was previously available with transdermal buprenorphine systems...
2016: Journal of Pain Research
https://www.readbyqxmd.com/read/27818875/cross-cultural-adaptation-and-validity-of-the-spanish-central-sensitization-inventory
#11
Antonio Ignacio Cuesta-Vargas, Cristina Roldan-Jimenez, Randy Neblett, Robert J Gatchel
PURPOSING: The Central Sensitization Inventory (CSI) is a new patient-reported instrument, which measures symptoms related to Central Sensitivity Syndromes and Central Sensitization. The aim of this study was to translate the CSI into Spanish, and then to perform a psychometric validation, including a factor analysis to reveal the underlying structure. METHODS: In this two-stage psychometric study participated 395 subjects with various chronic pain conditions and that were recruited from two Primary Care Centres...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27818188/complete-spinal-cord-injury-sci-transforms-how-brain-derived-neurotrophic-factor-bdnf-affects-nociceptive-sensitization
#12
Yung-Jen Huang, Kuan H Lee, James W Grau
Noxious stimulation can induce a lasting increase in neural excitability within the spinal cord (central sensitization) that can promote pain and disrupt adaptive function (maladaptive plasticity). Brain-derived neurotrophic factor (BDNF) is known to regulate the development of plasticity and has been shown to impact the development of spinally-mediated central sensitization. The latter effect has been linked to an alteration in GABA-dependent inhibition. Prior studies have shown that, in spinally transected rats, exposure to regular (fixed spaced) stimulation can counter the development of maladaptive plasticity and have linked this effect to an up-regulation of BDNF...
November 3, 2016: Experimental Neurology
https://www.readbyqxmd.com/read/27812331/central-sensitization-of-mechanical-nociceptive-pathways-is-associated-with-a-long-lasting-increase-of-pinprick-evoked-brain-potentials
#13
Emanuel N van den Broeke, Julien Lambert, Gan Huang, André Mouraux
Intense or sustained nociceptor activation, occurring, for example, after skin injury, can induce "central sensitization," i.e., an increased responsiveness of nociceptive neurons in the central nervous system. A hallmark of central sensitization is increased mechanical pinprick sensitivity in the area surrounding the injured skin. The aim of the present study was to identify changes in brain activity related to this increased pinprick sensitivity. In 20 healthy volunteers, increased pinprick sensitivity was induced using high frequency electrical stimulation of the forearm skin (HFS)...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27803647/nr2b-expression-in-rat-drg-is-differentially-regulated-following-peripheral-nerve-injuries-that-lead-to-transient-or-sustained-stimuli-evoked-hypersensitivity
#14
Monica Norcini, Alexandra Sideris, Samantha M Adler, Lourdes A M Hernandez, Jin Zhang, Thomas J J Blanck, Esperanza Recio-Pinto
Following injury, primary sensory neurons undergo changes that drive central sensitization and contribute to the maintenance of persistent hypersensitivity. NR2B expression in the dorsal root ganglia (DRG) has not been previously examined in neuropathic pain models. Here, we investigated if changes in NR2B expression within the DRG are associated with hypersensitivities that result from peripheral nerve injuries. This was done by comparing the NR2B expression in the DRG derived from two modalities of the spared nerve injury (SNI) model, since each variant produces different neuropathic pain phenotypes...
2016: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/27800536/gastrointestinal-headache-a-narrative-review
#15
REVIEW
Majid T Noghani, Hossein Rezaeizadeh, Sayed Mohammad Baqer Fazljoo, Mansoor Keshavarz
There are studies reporting primary headaches to be associated with gastrointestinal disorders, and some report resolution of headache following the treatment of the associated gastrointestinal disorder. Headache disorders are classified by The International Headache Society as primary or secondary; however, among the secondary headaches, those attributed to gastrointestinal disorders are not appreciated. Therefore, we aimed to review the literature to provide evidence for headaches, which originate from the gastrointestinal system...
November 2016: Emergency (Tehran, Iran)
https://www.readbyqxmd.com/read/27776136/zeta-inhibitory-peptide-as-a-novel-therapy-to-control-chronic-visceral-hypersensitivity-in-a-rat-model
#16
Ying Tang, Aiqin Chen, Yu Chen, Lixia Guo, Hengfen Dai, Yang Huang, Qianqian Chen, Chun Lin
BACKGROUND: The pathogenesis of multiple chronic visceral pain syndromes, such as irritable bowel syndrome (IBS), is not well known, and as a result current therapies are ineffective. The objective of this study was to investigate the effect of spinal protein kinase M zeta (PKMζ) on visceral pain sensitivity in rats with IBS to better understand the pathogenesis and investigate the effect of zeta inhibitory peptide (ZIP) as a therapy for chronic visceral pain. METHODS: Visceral hypersensitivity rats were produced by neonatal maternal separation (NMS)...
2016: PloS One
https://www.readbyqxmd.com/read/27760054/central-sensitization-a-clinical-conundrum
#17
John Srbely, Brian Vadasz, Jay Shah, Naomi Lynn Gerber, Siddhartha Sikdar, Dinesh Kumbhare
No abstract text is available yet for this article.
November 2016: Clinical Journal of Pain
https://www.readbyqxmd.com/read/27755498/painful-cervical-facet-joint-injury-is-accompianed-by-changes-in-the-number-of-excitatory-and-inhibitory-synapses-in-the-superficial-dorsal-horn-that-differentially-relate-to-local-tissue-injury-severity
#18
Meagan E Ita, Nathan D Crosby, Ben A Bulka, Beth A Winkelstein
STUDY DESIGN: Immunohistochemistry labeled pre- and post-synaptic structural markers to quantify excitatory and inhibitory synapses in the spinal superficial dorsal horn at 14 days after painful facet joint injury in the rat. OBJECTIVE: The objective of this study was to investigate the relationship between pain and synapse density in the spinal cord after facet injury. SUMMARY OF BACKGROUND DATA: Neck pain is a major contributor to disability and often becomes chronic...
October 17, 2016: Spine
https://www.readbyqxmd.com/read/27755280/childhood-adversity-and-pain-sensitization
#19
Dokyoung Sophia You, Mary W Meagher
OBJECTIVE: Childhood adversity is a vulnerability factor for chronic pain. However, the underlying pain mechanisms influenced by childhood adversity remain unknown. The aim of the current study was to evaluate the impact of childhood adversity on dynamic pain sensitivity in young adults. METHODS: After screening for childhood adverse events and health status, healthy individuals reporting low (below median; n = 75) or high levels of adversity (the top 5%; n = 51) were invited for pain testing...
October 13, 2016: Psychosomatic Medicine
https://www.readbyqxmd.com/read/27754734/successful-treatment-of-opioid-refractory-cancer-pain-with-short-course-low-dose-ketamine
#20
Julie M Waldfogel, Suzanne Nesbit, Steven P Cohen, Sydney M Dy
Opioids remain the mainstay of treatment for severe cancer pain, but up to 20% of patients have persistent or refractory pain despite rapid and aggressive opioid titration, or develop refractory pain after long-term opioid use. In these scenarios, alternative agents and mechanisms for analgesia should be considered. This case report describes a 28-year-old man with metastatic pancreatic neuroendocrine cancer with severe, intractable pain despite high-dose opioids including methadone and a hydromorphone patient-controlled analgesia (PCA)...
October 18, 2016: Journal of Pain & Palliative Care Pharmacotherapy
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