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https://www.readbyqxmd.com/read/28328700/lumbar-tactile-acuity-in-patients-with-low-back-pain-and-healthy-controls-systematic-review-and-meta-analysis
#1
Wacław Adamczyk, Kerstin Luedtke, Edward Saulicz
OBJECTIVE: Diminished tactile acuity in chronic non-neuropathic pain syndromes has been attributed to central pain processing and cortical reorganization. The latter was recently targeted in clinical trials that demonstrated no clear advantages over traditional approaches for the reduction of nonspecific low back pain (LBP). The aim of this systematic review and meta-analysis was to summarize the current evidence on tactile acuity in LBP and pain-free controls. METHODS: Six databases were independently searched by 2 researchers...
March 21, 2017: Clinical Journal of Pain
https://www.readbyqxmd.com/read/28328571/neuropathic-pain-induced-enhancement-of-spontaneous-and-pain-evoked-neuronal-activity-in-the-periaqueductal-gray-that-is-attenuated-by-gabapentin
#2
Vijay K Samineni, Louis S Premkumar, Carl L Faingold
Neuropathic pain is a debilitating pathological condition that is poorly understood. Recent evidence suggests that abnormal central processing occurs during the development of neuropathic pain induced by the cancer chemotherapeutic agent, paclitaxel. Yet, it is unclear what role neurons in supraspinal pain network sites, such as the periaqueductal gray, play in altered behavioral sensitivity seen during chronic pain conditions. To elucidate these mechanisms, we studied the spontaneous and thermally-evoked firing patterns of ventrolateral periaqueductal gray (vlPAG) neurons in awake behaving rats treated with paclitaxel to induce neuropathic pain...
March 21, 2017: Pain
https://www.readbyqxmd.com/read/28327997/lumbar-fusion-for-degenerative-disease-a-systematic-review-and-meta-analysis
#3
Daniel Yavin, Steven Casha, Samuel Wiebe, Thomas E Feasby, Callie Clark, Albert Isaacs, Jayna Holroyd-Leduc, R John Hurlbert, Hude Quan, Andrew Nataraj, Garnette R Sutherland, Nathalie Jette
BACKGROUND: Due to uncertain evidence, lumbar fusion for degenerative indications is associated with the greatest measured practice variation of any surgical procedure. OBJECTIVE: To summarize the current evidence on the comparative safety and efficacy of lumbar fusion, decompression-alone, or nonoperative care for degenerative indications. METHODS: A systematic review was conducted using PubMed, MEDLINE, EMBASE, and the Cochrane Central Register of Controlled Trials (up to June 30, 2016)...
March 17, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28326946/polyamidoamine-dendrimer-conjugated-triamcinolone-acetonide-attenuates-nerve-injury-induced-spinal-cord-microglia-activation-and-mechanical-allodynia
#4
Hwisung Kim, Boomin Choi, Hyoungsub Lim, Hyunjung Min, Jae Hoon Oh, Sunghyun Choi, Joung Goo Cho, Jong-Sang Park, Sung Joong Lee
Background Accumulating evidence on the causal role of spinal cord microglia activation in the development of neuropathic pain after peripheral nerve injury suggests that microglial activation inhibitors might be useful analgesics for neuropathic pain. Studies also have shown that polyamidoamine dendrimer may function as a drug delivery vehicle to microglia in the central nervous system. In this regard, we developed polyamidoamine dendrimer-conjugated triamcinolone acetonide, a previously identified microglial activation inhibitor, and tested its analgesic efficacy in a mouse peripheral nerve injury model...
January 2017: Molecular Pain
https://www.readbyqxmd.com/read/28326944/fatty-acid-binding-protein-inhibition-produces-analgesic-effects-through-peripheral-and-central-mechanisms
#5
Xiaoxue Peng, Keith Studholme, Martha P Kanjiya, Jennifer Luk, Diane Bogdan, Matthew W Elmes, Gregory Carbonetti, Simon Tong, Yu-Han Gary Teng, Robert C Rizzo, Huilin Li, Dale G Deutsch, Iwao Ojima, Mario J Rebecchi, Michelino Puopolo, Martin Kaczocha
Background Fatty-acid-binding proteins (FABPs) are intracellular carriers for endocannabinoids, N-acylethanolamines, and related lipids. Previous work indicates that systemically administered FABP5 inhibitors produce analgesia in models of inflammatory pain. It is currently not known whether FABP inhibitors exert their effects through peripheral or central mechanisms. Here, we examined FABP5 distribution in dorsal root ganglia and spinal cord and examined the analgesic effects of peripherally and centrally administered FABP5 inhibitors...
January 2017: Molecular Pain
https://www.readbyqxmd.com/read/28326937/the-dietary-constituent-resveratrol-suppresses-nociceptive-neurotransmission-via-the-nmda-receptor
#6
Shiori Takehana, Yoshiko Kubota, Nobuo Uotsu, Kei Yui, Koichi Iwata, Yoshihito Shimazu, Mamoru Takeda
Background Although we have previously reported that intravenous resveratrol administration inhibits the nociceptive neuronal activity of spinal trigeminal nucleus caudalis neurons, the site of the central effect remains unclear. The aim of the present study was to examine whether acute intravenous resveratrol administration in the rat attenuates central glutamatergic transmission of spinal trigeminal nucleus caudalis neurons responding to nociceptive mechanical stimulation in vivo, using extracellular single-unit recordings and microiontophoretic techniques...
January 2017: Molecular Pain
https://www.readbyqxmd.com/read/28326929/dendritic-spine-dysgenesis-in-superficial-dorsal-horn-sensory-neurons-after-spinal-cord-injury
#7
Xiaoyu C Cao, Laura W Pappalardo, Stephen G Waxman, Andrew M Tan
Neuropathic pain is a major complication of spinal cord injury, and despite aggressive efforts, this type of pain is refractory to available clinical treatment. Our previous work has demonstrated a structure-function link between dendritic spine dysgenesis on nociceptive sensory neurons in the intermediate zone, laminae IV/V, and chronic pain in central nervous system and peripheral nervous system injury models of neuropathic pain. To extend these findings, we performed a follow-up structural analysis to assess whether dendritic spine remodeling occurs on superficial dorsal horn neurons located in lamina II after spinal cord injury...
January 2017: Molecular Pain
https://www.readbyqxmd.com/read/28326850/multimodal-analgesia-in-moderate-to-severe-pain-a-role-for-a-new-fixed-combination-of-dexketoprofen-and-tramadol
#8
Giustino Varrassi, Magdi Hanna, Giorgos Macheras, Antonio Montero, Antonio Montes Perez, Winfried Meissner, Serge Perrot, Carmelo Scarpignato
Untreated and undertreated pain represent one of the most pervasive health problems, which is worsening as the population ages and accrues risk for pain. Multiple treatment options are available, most of which have one mechanism of action, and cannot be prescribed at unlimited doses due to the ceiling of efficacy and/or safety concerns. Another limitation of single-agent analgesia is that, in general, pain is due to multiple causes. Combining drugs from different classes, with different and complementary mechanism(s) of action, provides a better opportunity for effective analgesia at reduced doses of individual agents...
March 22, 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/28325432/wide-awake-ultrasound-guided-percutaneous-extensor-central-slip-tenotomy-for-chronic-mallet-finger-a-prospective-study-of-14-cases-with-videos
#9
T Apard, G Candelier
The central slip tenotomy described by Fowler is an effective option for treating chronic mallet finger in order to avoid swan neck deformity of the finger. In a prospective study of 14 cases (13 failures of conservative treatment and one case of untreated mallet finger), we performed percutaneous ultrasound-guided central slip tenotomy with a 19 G needle using the wide-awake local anesthesia and no tourniquet (WALANT) technique. The mean extensor lag before surgery was 28° (range 20°-40°) and three patients had a swan neck deformity...
April 2017: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/28325149/low-dose-naltrexone-in-the-treatment-of-fibromyalgia
#10
Samy K Metyas, Karen Yeter, John Solyman, Daniel Arkfeld
Fibromyalgia is a chronic pain disorder characterized by diffuse musculoskeletal pain, fatigue, sleep disturbance and cognitive impairment. A significant number of fibromyalgia patients do not respond adequately to the current drugs (pregabalin, milnacipran, duloxetine) approved for fibromyalgia treatment by the Food and Drug Administration (FDA). Thus, there is still a need for adjunctive therapies. Naltrexone is an opioid receptor antagonist used to treat alcohol and opioid dependence. It is hypothesized that low dose naltrexone causes transient blockade of opioid receptors centrally resulting in a rebound of endorphin function which may attenuate pain in fibromyalgia...
March 21, 2017: Current Rheumatology Reviews
https://www.readbyqxmd.com/read/28322749/cannabinoid-receptor-1-contributes-to-sprouted-innervation-in-endometrial-ectopic-growth-through-mitogen-activated-protein-kinase-activation
#11
Hongxiu Han, Xizi Liang, Juan Wang, Qianqian Zhao, Mei Yang, Weifang Rong, Guohua Zhang
The endocannabinoid system regulates neurite outgrowth and neurogenesis during development of the central nervous system. Cannabinoid receptor 1 (CB1R) is expressed in neurons, including the somata and fibers, that innervate the endometrial ectopic cyst in rats. Here, we investigated the contribution of CB1R and its downstream signaling to the innervation of endometrial ectopic growth. We found that intrathecal injection of a CB1R agonist enhanced both the density of protein gene product (PGP) 9.5-immunoreactive sprouted nerve fibers and the protein level of PGP 9...
March 17, 2017: Brain Research
https://www.readbyqxmd.com/read/28321335/quantitative-thermal-testing-profiles-as-a-predictor-of-treatment-response-to-topical-capsaicin-in-patients-with-localized-neuropathic-pain
#12
A Serrano, D Torres, M Veciana, C Caro, J Montero, V Mayoral
There are no reliable predictors of response to treatment with capsaicin. Given that capsaicin application causes heat sensation, differences in quantitative thermal testing (QTT) profiles may predict treatment response. The aim of this study was to determine whether different QTT profiles could predict treatment outcomes in patients with localized peripheral neuropathic pain (PeLNP). We obtained from medical records QTT results and treatment outcomes of 55 patients treated between 2010 and 2013. Warm sensation threshold (WST) and heat pain threshold (HPT) values were assessed at baseline at the treatment site and in the asymptomatic, contralateral area...
2017: Pain Research and Treatment
https://www.readbyqxmd.com/read/28320963/conformational-dynamics-and-role-of-the-acidic-pocket-in-asic-ph-dependent-gating
#13
Sabrina Vullo, Gaetano Bonifacio, Sophie Roy, Niklaus Johner, Simon Bernèche, Stephan Kellenberger
Acid-sensing ion channels (ASICs) are proton-activated Na(+) channels expressed in the nervous system, where they are involved in learning, fear behaviors, neurodegeneration, and pain sensation. In this work, we study the role in pH sensing of two regions of the ectodomain enriched in acidic residues: the acidic pocket, which faces the outside of the protein and is the binding site of several animal toxins, and the palm, a central channel domain. Using voltage clamp fluorometry, we find that the acidic pocket undergoes conformational changes during both activation and desensitization...
March 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28319882/pain-characteristics-as-important-contributing-factors-to-upper-limb-dysfunctions-in-breast-cancer-survivors-at-long-term
#14
An De Groef, Mira Meeus, Tessa De Vrieze, Lore Vos, Marijke Van Kampen, Marie-Rose Christiaens, Patrick Neven, Inge Geraerts, Nele Devoogdt
PURPOSE: The aim of this study was to explore the treatment, patient, and impairment-related risk factors associated with upper limb dysfunctions in breast cancer survivors. METHODS: A cross-sectional study was performed in 274 women treated for breast cancer. The following risk factors were analysed by bivariable and multivariable analysis: 1) treatment-related variables (type of surgery, levels of lymph node dissected, radiotherapy, chemotherapy, hormone therapy and trastuzumab); 2) patient's related variables (age and Body Mass Index); 3) and finally impairment-related variables such as pain (intensity, quality and pressure hypersensitivity, signs of central sensitisation, the degree of pain catastrophizing and vigilance and awareness to pain), active ROM and upper limb strength were investigated...
March 14, 2017: Musculoskelet Sci Pract
https://www.readbyqxmd.com/read/28319509/a-high-preoperative-pain-and-symptom-profile-predicts-worse-pain-outcomes-for-children-after-spine-fusion-surgery
#15
Terri Voepel-Lewis, Michelle S Caird, Alan R Tait, Shobha Malviya, Frances A Farley, Ying Li, Matthew D Abbott, Tara van Veen, Afton L Hassett, Daniel J Clauw
BACKGROUND: Preoperative pain predicts persistent pain after spine fusion, yet little is understood about the nature of that pain, related symptoms, and how these symptoms relate to postoperative pain outcomes. This prospective study examined children's baseline pain and symptom profiles and the association between a high symptom profile and postoperative outcomes. METHODS: Seventy children (aged 10-17 years) scheduled for correction of idiopathic scoliosis completed pain and symptom surveys during their preoperative visit (ie, pain intensity [0-10 numeric rating scores], a pediatric version of the 2011 fibromyalgia survey criteria [including pain locations and symptom severity scale], neuropathic pain symptoms [painDETECT], and Patient-Reported Outcome Measurement System measures of fatigue, depression, function, pain interference, and pain catastrophizing)...
March 17, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28316855/central-nervous-system-involvement-in-henoch-schonlein-purpura-in-children-and-adolescents
#16
Iliyana H Pacheva, Ivan S Ivanov, Krastina Stefanova, Elena Chepisheva, Lyubov Chochkova, Dafina Grozeva, Angelina Stoyanova, Stojan Milenkov, Penka Stefanova, Anna Petrova
Central nervous system (CNS) involvement in Henoch-Schonlein purpura (HSP) is rare but poses diagnostic difficulties. The aim of the study was to establish the frequency of CNS involvement in HSP, to analyze its clinical characteristics and do a literature review. Medical files of patients with HSP admitted at the Department of Pediatrics, Plovdiv, were studied retrospectively for a five-year period (2009-2013). Diagnosis was based on the American College of Rheumatology criteria. Out of 112 children with HSP 1 case (0...
2017: Case Reports in Pediatrics
https://www.readbyqxmd.com/read/28316278/high-risk-obstetrical-call-center-a-model-for-regions-with-limited-access-to-care
#17
Sarah J Rhoads, Hari Eswaran, Christian E Lynch, Songthip T Ounpraseuth, Everett F Magann, Curtis L Lowery
PURPOSE: High-risk obstetrical care can be challenging for women in rural states with limited access. MATERIALS AND METHODS: Data were evaluated from 62,342 obstetrical calls from pregnant and postpartum patients within rural Arkansas to a nurse call center. Call center nurses provided triage using evidence-based guidelines to patients across the state. Data were extracted and analyzed using retrospective data collection and descriptive statistical methods. RESULTS: Women had an average maternal age of 28 years old, average weeks gestation was 27...
March 19, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28315678/protective-effect-of-co-administration-of-curcumin-and-sildenafil-in-alcohol-induced-neuropathy-in-rats
#18
Maninder Kaur, Amarjeet Singh, Bimlesh Kumar, Sachin Kumar Singh, Amit Bhatia, Monica Gulati, T Prakash, Palak Bawa, Adil Hussain Malik
Neuropathic pain associated with chronic alcohol consumption is a medico-socioeconomical problem that affects both central and peripheral nervous system and has no satisfactory treatment till date. The present study was designed to investigate the protective effect of co-administration of curcumin and sildenafil on alcohol induced neuropathic pain in rats. In order to carry out this, ethanol (35% v/v, 10g/kg, p.o.) was administered for 10 weeks to induce neuropathic pain. Curcumin (30 and 60mg/kg, i.p.) and sildenafil (5 and 10mg/kg, i...
March 16, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28315395/acute-intravenous-administration-of-dietary-constituent-theanine-suppresses-noxious-neuronal-transmission-of-trigeminal-spinal-nucleus-caudalis-in-rats
#19
Shiori Takehana, Yoshiko Kubota, Nobuo Uotsu, Kei Yui, Yoshihito Shimazu, Mamoru Takeda
Theanine is a non-dietary amino acid linked to the modulation of synaptic transmission in the central nervous system, although the acute effects of theanine in vivo, particularly on nociceptive transmission in the trigeminal system, remain to be determined. The present study investigated whether acute intravenous theanine administration to rats attenuates the excitability of wide dynamic range (WDR) spinal trigeminal nucleus caudalis (SpVc) neurons in response to nociceptive and non-nociceptive mechanical stimulation in vivo...
March 14, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28315268/sigma-1-receptor-antagonists-a-new-class-of-neuromodulatory-analgesics
#20
Cristina Sánchez-Fernández, José Manuel Entrena, José Manuel Baeyens, Enrique José Cobos
The sigma-1 receptor is a unique ligand-operated chaperone present in key areas for pain control, in both the peripheral and central nervous system. Sigma-1 receptors interact with a variety of protein targets to modify their function. These targets include several G-protein-coupled receptors such as the μ-opioid receptor, and ion channels such as the N-methyl-D-aspartate receptor (NMDAR). Sigma-1 antagonists modify the chaperoning activity of sigma-1 receptor by increasing opioid signaling and decreasing NMDAR responses, consequently enhancing opioid antinociception and decreasing the sensory hypersensitivity that characterizes pathological pain conditions...
2017: Advances in Experimental Medicine and Biology
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