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Hyperalgesia

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https://www.readbyqxmd.com/read/27911127/immediate-and-lasting-effects-of-a-thoracic-spine-manipulation-in-a-patient-with-signs-of-cervical-radiculopathy-and-upper-extremity-hyperalgesia-a-case-report
#1
Beth K Deschenes, Jason Zafereo
Patients with cervical radiculopathy (CR) may present with accompanying symptoms of hyperalgesia, allodynia, heaviness in the arm, and non-segmental pain that do not appear to be related to a peripheral spinal nerve. These findings may suggest the presence of central or autonomic nervous system involvement, requiring a modified management approach. The purpose of this case report is to describe the treatment of a patient with signs of CR and upper extremity (UE) hyperalgesia who had a significant decrease in her UE pain and hypersensitivity after a single thoracic spine manipulation (TSM)...
December 2, 2016: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/27910150/randomised-clinical-trial-exploratory-phase-2-study-of-ono-2952-in-diarrhoea-predominant-irritable-bowel-syndrome
#2
W E Whitehead, K Duffy, J Sharpe, T Nabata, M Bruce
BACKGROUND: ONO-2952 is a novel and selective inhibitor of translocator protein 18 kDa that reduces stress-induced defecation and visceral hyperalgesia in rat models. AIM: To evaluate the efficacy and safety of ONO-2952 in females with irritable bowel syndrome with diarrhoea in an exploratory proof-of-concept study. METHODS: A randomised, double-blind, placebo-controlled study was conducted at 49 US centres. Two hundred subjects with irritable bowel syndrome with diarrhoea (Rome III criteria) were randomised to ONO-2952 20 mg, or 60 mg, or placebo...
January 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/27907881/effect-of-toad-skin-extracts-on-the-pain-behavior-of-cancer-model-mice-and-its-peripheral-mechanism-of-action
#3
Tao Chen, Shen-Jun Yuan, Xue-Qin Yu, Liang-Bo Jiao, Wei Hu, Wang-Long Chen, Bo Xie
The changes in thermal and mechanical hyperalgesia in paw cancer pain model mice and the action mechanism of toad skin extracts (TSE) was investigated. Eighty female mice were subcutaneously injected with saline or inoculated with H22 hepatoma cells in the right hind paw and administration with saline, vehicle, morphine and TSE. The pain behavior was recorded before treatment and at 0.5, 1.0, 1.5, 3 and 6h after initial administration, and thereafter on the 2nd, 4th, 6th, and 8th day after administration. On the last day, samples were collected after the euthanasia for the detection of β-END, CRF, IL-1β, POMC, μ-OR, CD3+, CD8+ and CD4+ in sera and the tumor tissues...
November 28, 2016: International Immunopharmacology
https://www.readbyqxmd.com/read/27900781/the-present-and-future-of-opioid-analgesics-in-small-animal-practice
#4
REVIEW
B T Simon, P V Steagall
Opioids are the cornerstone for the treatment of acute pain in small animal patients. This is primarily because of their remarkable safety profile, high efficacy, and benefit of reversibility. There have been some significant advances in our knowledge on opioid pharmacology and clinical usage in companion animal medicine. This review discusses the progression of opioid use in small animal practice providing current misconceptions and controversies in light of routes of administration. Potential targets for research and drug development and novel therapies are discussed in addition to the concepts of glial cell modulators, individual variability, and opioid tolerance and hyperalgesia...
November 30, 2016: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/27898461/cold-pain-threshold-identifies-a-subgroup-of-patients-with-knee-osteoarthritis-that-present-with-multimodality-hyperalgesia-and-elevated-pain-levels
#5
Anthony Wright, Heather A E Benson, Rob Will, Penny Moss
OBJECTIVES: Cold hyperalgesia has been established as an important marker of pain severity in a number of conditions. This study aimed to establish the extent to which patients with knee osteoarthritis (OA) demonstrate widespread cold, heat, and pressure hyperalgesia. OA participants with widespread cold hyperalgesia were compared with the remaining OA cohort to determine whether they could be distinguished in terms of hyperalgesia, pain report, pain quality, and physical function. METHODS: A total of 80 participants with knee OA and 40 matched healthy controls participated...
November 24, 2016: Clinical Journal of Pain
https://www.readbyqxmd.com/read/27896922/-epigallocatechin-3-gallate-antihyperalgesic-effect-associates-with-reduced-cx3cl1-chemokine-expression-in-spinal-cord
#6
Marc Bosch-Mola, Judit Homs, Beltrán Álvarez-Pérez, Teresa Puig, Francisco Reina, Enrique Verdú, Pere Boadas-Vaello
(-)-Epigallocatechin-3-gallate (EGCG) is a major polyphenol in green tea with beneficial effects on the neuropathic pain alleviation in animal models. Because chemokine fractalkine (CX3CL1) has been suggested as an important signal during neuropathic pain development, this study aimed to investigate whether CX3CL1 expression may be modulated by EGCG treatment reducing hyperalgesia in chronic constriction injured mice. To this end, Balb/c mice were subjected to a chronic constriction injury of sciatic nerve (CCI) and treated with EGCG or vehicle once a day during the first week following surgery...
November 29, 2016: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/27896032/gene-expression-profile-of-sodium-channel-subunits-in-the-anterior-cingulate-cortex-during-experimental-paclitaxel-induced-neuropathic-pain-in-mice
#7
Willias Masocha
Paclitaxel, a chemotherapeutic agent, causes neuropathic pain whose supraspinal pathophysiology is not fully understood. Dysregulation of sodium channel expression, studied mainly in the periphery and spinal cord level, contributes to the pathogenesis of neuropathic pain. We examined gene expression of sodium channel (Nav) subunits by real time polymerase chain reaction (PCR) in the anterior cingulate cortex (ACC) at day 7 post first administration of paclitaxel, when mice had developed paclitaxel-induced thermal hyperalgesia...
2016: PeerJ
https://www.readbyqxmd.com/read/27895138/urotensin-ii-inhibitor-eases-neuropathic-pain-by-suppressing-the-jnk-nf-%C3%AE%C2%BAb-pathway
#8
Jing Li, Pan-Pan Zhao, Ting Hao, Dan Wang, Yu Wang, Yang-Zi Zhu, Yu-Qing Wu, Cheng-Hua Zhou
Urotensin II (U-II), a cyclic peptide originally isolated from the caudal neurosecretory system of fishes, can produce proinflammatory effects through its specific G protein-coupled receptor, GPR14. Neuropathic pain, a devastating disease, is related to excessive inflammation in the spinal dorsal horn. However, the relationship between U-II and neuropathic pain has not been reported. This study was designed to investigate the effect of U-II antagonist on neuropathic pain and to understand the associated mechanisms...
February 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/27893485/peripheral-neuropathic-pain-a-mechanism-related-organizing-principle-based-on-sensory-profiles
#9
Ralf Baron, Christoph Maier, Nadine Attal, Andreas Binder, Didier Bouhassira, Giorgio Cruccu, Nanna B Finnerup, Maija Haanpää, Per Hansson, Philipp Hüllemann, Troels S Jensen, Rainer Freynhagen, Jeffrey D Kennedy, Walter Magerl, Tina Mainka, Maren Reimer, Andrew S C Rice, Märta Segerdahl, Jordi Serra, Sören Sindrup, Claudia Sommer, Thomas Tölle, Jan Vollert, Rolf-Detlef Treede
Patients with neuropathic pain are heterogeneous in etiology, pathophysiology and clinical appearance. They exhibit a variety of pain-related sensory symptoms and signs (sensory profile). Different sensory profiles might indicate different classes of neurobiological mechanisms and hence subgroups with different sensory profiles might respond differently to treatment.The aim of the investigation was to identify subgroups in a large sample of neuropathic pain patients using hypothesis-free statistical methods on the database of three large multi-national research networks (German Research Network on Neuropathic Pain (DFNS), IMI-Europain, Neuropain)...
November 3, 2016: Pain
https://www.readbyqxmd.com/read/27892848/phytochemical-screening-and-analgesic-profile-of-the-lyophilized-aqueous-extract-obtained-from-chrysobalanus-icaco-leaves-in-experimental-protocols
#10
Heitor G Araújo-Filho, Jessica Deise Santos Dias, Lucindo J Quintans-Júnior, Márcio R V Santos, Pollyanna A S White, Rosana S S Barreto, André S Barreto, Charles S Estevam, Silvan S Araujo, Jackson R G S Almeida, Irwin R A Menezes, Henrique D M Coutinho, Jullyana S S Quintans
CONTEXT: Chrysobalanus icaco L. (Chrysobalanaceae) has been used for the treatment of abdominal pain and cramps. OBJECTIVE: Assess the chemical and pharmacological profile of the lyophilized aqueous extract from C. icaco leaves (AEC). MATERIALS AND METHODS: Chromatographic methods were used to assess compounds from AEC. Mice were treated with vehicle (control group) or AEC (100, 200 or 400 mg/kg, p.o.) (group with 7-8 mice) and the analgesic profile was assessed employing the acetic acid-induced writhing, formalin, hot plate tests and hyperalgesia induced by carrageenan (CG) or tumour necrosis factor-alpha...
December 2016: Pharmaceutical Biology
https://www.readbyqxmd.com/read/27891521/food-derived-natural-compounds-for-pain-relief-in-neuropathic-pain
#11
REVIEW
Eun Yeong Lim, Yun Tai Kim
Neuropathic pain, defined as pain caused by a lesion or disease of the somatosensory nervous system, is characterized by dysesthesia, hyperalgesia, and allodynia. The number of patients with this type of pain has increased rapidly in recent years. Yet, available neuropathic pain medicines have undesired side effects, such as tolerance and physical dependence, and do not fully alleviate the pain. The mechanisms of neuropathic pain are still not fully understood. Injury causes inflammation and immune responses and changed expression and activity of receptors and ion channels in peripheral nerve terminals...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27891351/evaluation-of-effect-of-nishamalaki-on-stz-and-hfhf-diet-induced-diabetic-neuropathy-in-wistar-rats
#12
Jayshree Shriram Dawane, Vijaya Anil Pandit, Madhura Shirish Kumar Bhosale, Pallawi Shashank Khatavkar
INTRODUCTION: Diabetic neuropathy is one of the most common complications affecting 50% of diabetic patients. Neuropathic pain is the most difficult types of pain to treat. There is no specific treatment for neuropathy. Nishamalaki (NA), combination of Curcuma longa and Emblica officinalis used to treat Diabetes Mellitus (DM). So, efforts were made to test whether NA is useful in prevention of diabetic neuropathy. AIM: To evaluate the effect of NA on diabetic neuropathy in type 2 diabetic wistar rats...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27890700/biochanin-a-attenuates-neuropathic-pain-in-diabetic-rats
#13
Venkateswarlu Chundi, Siva Reddy Challa, Devala Rao Garikapati, Giridhar Juvva, Anusha Jampani, Sree Harsha Pinnamaneni, Sahithi Venigalla
BACKGROUND: Soya supplements are used in the treatment of neuropathic pain. Previous reports reveal that consumption of soy diet before nerve injury prevents the development of neuropathic pain in rats. Biochanin-A, a soy isoflavone, has a naturally occurring inhibitor of fatty acid amide hydrolase (FAAH) that metabolized endocannabinoids. OBJECTIVE: The objective was to evaluate efficacy of biochanin-A in streptozotocin (STZ) induced neuropathic pain in rat model...
November 25, 2016: Journal of Ayurveda and Integrative Medicine
https://www.readbyqxmd.com/read/27889175/inhibition-of-adenylyl-cyclase-in-the-spinal-cord-alleviates-painful-diabetic-neuropathy-in-zucker-diabetic-fatty-rats
#14
Hao Feng, Guodong Lu, Qingsong Li, Zhonghao Liu
OBJECTIVES: Diabetic neuropathy is the most common complication of both type 1 and type 2 diabetes. In this study, we tested the hypotheses that impaired Gi protein expression/function in the spinal cord is associated with the development of painful neuropathy in people with type 2 diabetes and that reduction of cyclic adenosine monophosphate (cAMP) production by inhibiting adenylyl cyclase in the spinal cord can alleviate diabetic neuropathy. METHODS: To this end, we examined the levels of cAMP, cAMP-dependent protein kinase (PKA) and cAMP response element-binding protein (CREB) in the spinal cord after the development of neuropathic pain in Zucker diabetic fatty (ZDF) rats with type 2 diabetes...
November 23, 2016: Canadian Journal of Diabetes
https://www.readbyqxmd.com/read/27888114/limonene-reduces-hyperalgesia-induced-by-gp120-and-cytokines-by-modulation-of-il-1-%C3%AE-and-protein-expression-in-spinal-cord-of-mice
#15
Ana Claudia Piccinelli, Priscila Neder Morato, Marcelo Dos Santos Barbosa, Julio Croda, Jared Sampson, Xiangpeng Kong, Elisabete Castelon Konkiewitza, Edward B Ziff, Jaime Amaya-Farfan, Cândida Aparecida Leite Kassuya
AIMS: We have investigated the antihyperalgesic effects of limonene in mice that received intrathecal injection of gp120. MAIN METHODS: Male Swiss mice received gp120, IL-1β or TNF-α intrathecally or sterile saline as a control. A mechanicalsensitivity test was performed at 2 and 3h after the injection. Spinal cord and blood samples were isolated for protein quantification. KEY FINDINGS: Intrathecal administration of gp120 increased mechanical sensitivity measured with an electronic Von Frey apparatus, at 2 and 3h after the injections...
November 22, 2016: Life Sciences
https://www.readbyqxmd.com/read/27884737/botulinum-neurotoxin-type-a-alleviates-mechanical-hypersensitivity-associated-with-infraorbital-nerve-constriction-injury-in-rats
#16
Noboru Noma, Kosuke Watanabe, Yuka Sato, Yoshiki Imamura, Yumiko Yamamoto, Reio Ito, Mitsuru Maruno, Kohei Shimizu, Koichi Iwata
We investigated the effect of botulinum neurotoxin type A (BoNT-A) on mechanical allodynia and hyperalgesia associated with infraorbital nerve constriction (ION-CCI) in rats. ION-CCI rats received a subcutaneous BoNT-A injection into the whisker pad area on day 7 postoperatively and underwent pain assessment on days 14 and 21 postoperatively. Rats were assigned to one of four treatment groups (n=5 each): ION-CCI+BoNT-A 20pg (low-dose group), ION-CCI+BoNT-A 200pg (high-dose group), ION-CCI+saline, and Sham. Mechanical allodynia and hyperalgesia were evaluated preoperatively (baseline) and on days 7, 14, and 21 postoperatively...
November 21, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27876459/local-and-widespread-hyperalgesia-in-female-runners-with-patellofemoral-pain-are-influenced-by-running-volume
#17
Marcella Ferraz Pazzinatto, Danilo de Oliveira Silva, Juliana Pradela, Maira Bergamaschi Coura, Christian Barton, Fábio Mícolis de Azevedo
OBJECTIVES: To compare pressure pain threshold (PPT) around the knee (local hyperalgesia) and at a site remote to the knee (widespread hyperalgesia) between female runners with and without patellofemoral pain (PFP); and to evaluate the relationship between running volume, self-reported knee function and PPT measures. DESIGN: Cross-sectional study. METHODS: Twenty female runners with PFP and twenty pain-free female runners participated in the study...
November 11, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27874267/human-digital-meissner-corpuscles-display-immunoreactivity-for-the-multifunctional-ion-channels-trpc6-and-trpv4
#18
P Alonso-González, R Cabo, I San José, A Gago, I C Suazo, O García-Suárez, J Cobo, J A Vega
Ion channels are at the basis of the sensory processes including mechanosensing. Some members of the transient receptor (TRP) ion channel superfamily have been proposed as mechanosensors, but their putative role in mechanotransduction is controversial. Among them there are TRP canonical 6 (TRPC6) and TRP vanilloid 4 (TRPV4) ion channels, which are known to cooperate in mechanical hyperalgesia. Here we investigated the occurrence, distribution and possible co-localization of TRPC6 and TRPV4 in human digital Meissner sensory corpuscles using immunohistochemistry and double immunofluorescence (associate with markers for specific corpuscular constituents)...
November 22, 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27872694/long-term-treatment-by-vitamin-b1-and-reduction-of-serum-proinflammatory-cytokines-hyperalgesia-and-paw-edema-in-adjuvant-induced-arthritis
#19
Jalal Zaringhalam, Akhtar Akbari, Alireza Zali, Homa Manaheji, Vida Nazemian, Mahdi Shadnoush, Somayeh Ezzatpanah
INTRODUCTION: Immune system is involved in the etiology and pathophysiology of inflammation and vitamins are important sources of substances inducing nonspecific immunomodulatory effects. Given the proinflammatory role of cytokines in the inflammation and pain induction, this study aimed to assess the effects of long-term administration of vitamin B1 on the proinflammatory cytokines, edema, and hyperalgesia during the acute and chronic phases of adjuvant-induced arthritis. METHODS: On the first day of study, inflammation was induced by intraplantar injection of complete Freund's adjuvant (CFA) in the hindpaws of rats...
October 2016: Basic and Clinical Neuroscience
https://www.readbyqxmd.com/read/27871576/influence-of-high-dose-intraoperative-remifentanil-with-intravenous-ibuprofen-on-postoperative-morphine-consumption-in-patients-undergoing-pancreaticoduodenectomy-a-randomized-trial
#20
Chang-Hoon Koo, Youn Joung Cho, Deok Man Hong, Yunseok Jeon, Tae Kyong Kim
STUDY OBJECTIVE: High-dose remifentanil during surgery paradoxically increases postoperative pain intensity and morphine consumption. Cyclooxygenase inhibitors decrease prostaglandin synthesis, thereby antagonizing N-methyl-d-aspartate receptor activation, and may reduce hyperalgesia. This study was performed to evaluate whether postoperative morphine consumption increased following intraoperative continuous remifentanil infusion and whether this could be prevented by intravenous ibuprofen pretreatment...
December 2016: Journal of Clinical Anesthesia
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