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https://www.readbyqxmd.com/read/28913486/the-switch-from-buprenorphine-to-tapentadol-is-it-worth
#1
REVIEW
Adriana Miclescu
Opioid analgesia continues to be the primary pharmacologic intervention for managing acute pain and malignant pain in both hospitalized and ambulatory patients. The increasing use of opioids in chronic nonmalignant pain is more problematic. Opioid treatment is complicated with the risks raised by adverse effects, especially cognitive disturbance, respiratory depression but also the risk of tolerance, opioid abuse and drug-disease interactions. Despite the growing number of available opioids within the last years, adequate trials of opioid rotation are lacking and most of the information is anecdotal...
October 2016: Rom J Anaesth Intensive Care
https://www.readbyqxmd.com/read/28902684/estrogens-synthesized-and-acting-within-a-spinal-oligomer-suppress-spinal-endomorphin-2-antinociception-ebb-and-flow-over-the-rat-reproductive-cycle
#2
Nai-Jiang Liu, Vijaya Murugaiyan, Emiliya M Storman, Stephen A Schnell, Martin W Wessendorf, Alan R Gintzler
The magnitude of antinociception elicited by intrathecal endomorphin 2 (EM2), an endogenous mu-opioid receptor (MOR) ligand, varies across the rat estrous cycle. We now report that phasic changes in analgesic responsiveness to spinal EM2 result from plastic interactions within a novel membrane-bound oligomer containing estrogen receptors (mERs), aromatase (aka estrogen synthase), metabotropic glutamate receptor 1 (mGluR1), and MOR. During diestrus, spinal mERs, activated by locally synthesized estrogens, act with mGluR1 to suppress spinal EM2/MOR antinociception...
June 21, 2017: Pain
https://www.readbyqxmd.com/read/28894907/challenges-in-translational-drug-research-in-neuropathic-and-inflammatory-pain-the-prerequisites-for-a-new-paradigm
#3
REVIEW
A Taneja, O Della Pasqua, M Danhof
AIM: Despite an improved understanding of the molecular mechanisms of nociception, existing analgesic drugs remain limited in terms of efficacy in chronic conditions, such as neuropathic pain. Here, we explore the underlying pathophysiological mechanisms of neuropathic and inflammatory pain and discuss the prerequisites and opportunities to reduce attrition and high-failure rate in the development of analgesic drugs. METHODS: A literature search was performed on preclinical and clinical publications aimed at the evaluation of analgesic compounds using MESH terms in PubMed...
September 11, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28893757/effectiveness-and-cost-effectiveness-of-duloxetine-added-to-usual-care-for-patients-with-chronic-pain-due-to-hip-or-knee-osteoarthritis-protocol-of-a-pragmatic-open-label-cluster-randomised-trial-the-duo-trial
#4
Jacoline J van den Driest, Dieuwke Schiphof, Pim A J Luijsterburg, Aafke R Koffeman, Marc A Koopmanschap, Patrick J E Bindels, Sita M A Bierma-Zeinstra
INTRODUCTION: Osteoarthritis (OA) is a highly prevalent painful condition of the musculoskeletal system. The effectiveness of current analgesic options has proven to be limited and improved analgesic treatment is needed. Several randomised placebo-controlled trials have now demonstrated the efficacy of duloxetine, an antidepressant with a centrally acting effect, in the treatment of OA pain. The aim of the current study is to investigate if duloxetine is effective and cost-effective as a third-choice analgesic added to usual care for treating chronic pain compared with usual care alone in general practice...
September 11, 2017: BMJ Open
https://www.readbyqxmd.com/read/28891868/a-bivalent-ligand-that-activates-mu-opioid-receptor-and-antagonizes-mglur5-receptor-reduces-neuropathic-pain-in-mice
#5
Cristina D Peterson, Kelley F Kitto, Eyup Akgün, Mary M Lunzer, Maureen S Riedl, Lucy Vulchanova, George L Wilcox, Philip S Portoghese, Carolyn A Fairbanks
The mu opioid receptor (MOR) and metabotropic glutamate receptor 5 (mGluR5) are well-established pharmacological targets in the management of chronic pain. Both receptors are expressed in spinal cord. MMG22, a bivalent ligand containing two pharmacophores separated by 22 atoms that simultaneously activates MOR and antagonizes mGluR5 has been shown to produce potent reversal of tactile hypersensitivity in rodent models of LPS- and bone-cancer-induced chronic pain. The present study assessed whether intrathecal MMG22 also is effective in reducing pain of neuropathic origin...
September 1, 2017: Pain
https://www.readbyqxmd.com/read/28887293/influence-of-fear-of-pain-and-coping-strategies-on-health-related-quality-of-life-and-patient-anticipated-outcomes-in-patients-with-chronic-pain-cross-sectional-study-protocol
#6
Manasi Murthy Mittinty, David S Brennan, Cameron L Randall, Daniel W McNeil, Murthy N Mittinty, Lisa Jamieson
BACKGROUND: Fear of pain and coping strategies are emotional-behavioral responses to pain and are known to play an important role in the development and maintenance of pain. It is highly likely that fear of pain and coping strategies influence each other, potentially affecting the course of chronic pain. To our knowledge, the relationship between pain, fear of pain and coping strategies, and how they influence patient-anticipated outcomes and health-related quality of life, have not been investigated...
September 8, 2017: JMIR Research Protocols
https://www.readbyqxmd.com/read/28886020/low-plasma-cortisol-and-fecal-cortisol-metabolite-measures-as-indicators-of-compromised-welfare-in-domestic-horses-equus-caballus
#7
Jodi Pawluski, Patrick Jego, Séverine Henry, Anaelle Bruchet, Rupert Palme, Caroline Coste, Martine Hausberger
The hypothalamic-pituitary-adrenal (HPA) axis response to chronic stress is far from straight forward, particularly with regards to animal welfare. There are reports of no effect as well as both decreases and increases in cortisol after chronic stressors. Therefore, the first aim of the present study was to determine how measures of compromised welfare, such as chronic pain and haematological anomalies, related to cortisol levels in domestic horses (Equus caballus). Domestic horses are an informative model to investigate the impact of chronic stress (due to environment, pain, work, housing conditions…) on the HPA axis...
2017: PloS One
https://www.readbyqxmd.com/read/28885297/spinal-surgeons-opinions-on-pre-and-postoperative-rehabilitation-in-patients-undergoing-lumbar-spinal-fusion-surgery-a-survey-based-study-in-the-netherlands-and-sweden
#8
Reni M A van Erp, Jetse Jelsma, Ivan P J Huijnen, Mari Lundberg, Paul C Willems, Rob J E M Smeets
STUDY DESIGN: A cross-sectional survey in the Netherlands and Sweden. OBJECTIVE: To investigate Dutch and Swedish spinal surgeons' opinions on spinal fusion pre- and postoperative rehabilitation. SUMMARY OF BACKGROUND DATA: Lumbar spinal fusion surgery is increasingly provided in patients with chronic low back pain. No guidelines however exist for pre- and postoperative rehabilitation and it is unknown what opinions spinal surgeons currently have about pre- and postoperative rehabilitation...
September 6, 2017: Spine
https://www.readbyqxmd.com/read/28870191/effectiveness-of-a-specific-manual-approach-to-the-suboccipital-region-in-patients-with-chronic-mechanical-neck-pain-and-rotation-deficit-in-the-upper-cervical-spine-study-protocol-for-a-randomized-controlled-trial
#9
Vanessa González Rueda, Carlos López de Celis, Martín Eusebio Barra López, Andoni Carrasco Uribarren, Sara Castillo Tomás, Cesar Hidalgo García
BACKGROUND: Mechanical neck pain is a highly prevalent problem in primary healthcare settings. Many of these patients have restricted mobility of the cervical spine. Several manual techniques have been recommended for restoring cervical mobility, but their effectiveness in these patients is unknown. The aim of the present study is to compare the effectiveness of two types of specific techniques of the upper neck region: the pressure maintained suboccipital inhibition technique (PMSIT) and the translatory dorsal glide mobilization (TDGM) C0-C1 technique, as adjuncts to a protocolized physiotherapy treatment of the neck region in subjects with chronic mechanical neck pain and rotation deficit in the upper cervical spine...
September 5, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28859883/analgesic-effects-of-novel-lysophosphatidic-acid-receptor-5-antagonist-as2717638-in-rodents
#10
Nobuhito Murai, Hideki Hiyama, Tetsuo Kiso, Toshihiro Sekizawa, Tomonari Watabiki, Hiromasa Oka, Toshiaki Aoki
Lysophosphatidic acid (LPA) is a bioactive lipid that acts via at least six G protein-coupled receptors, LPA receptors 1-6 (LPA1-6), for various physiological functions. We examined (1) whether LPA5 is involved in pain signaling in the spinal cord; and (2) the pharmacological effects of a novel LPA5 antagonist on intrathecal prostaglandin (PG)- and (S)-α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA)-induced allodynia, and neuropathic and inflammatory pain in rodents. Intrathecal injection of a selective LPA5 agonist, geranylgeranyl diphosphate, and a non-selective agonist, LPA, induced allodynia in wild type, but not in LPA5 knockout mice...
August 30, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28858018/naloxegol-for-managing-opioid-induced-constipation
#11
Krystal N Shelton, Jennifer N Clements
Naloxegol is a peripherally acting mu-opioid receptor antagonist for opioid-induced constipation in adults with chronic noncancer pain. This drug's once-daily oral formulation can be used as monotherapy and helps to decrease the constipating effects of opioid therapy; however, it has been associated with abdominal pain.
September 2017: JAAPA: Official Journal of the American Academy of Physician Assistants
https://www.readbyqxmd.com/read/28857996/effect-of-suturation-plus-surgicel-application-on-post-tonsillectomy-bleeding-and-pain
#12
Hasan Cetiner, Ilker Cavusoglu, Sertac Duzer, Oner Sakallioglu, Nihat Susaman, Yavuz Sultan Selim Yildirim
OBJECTIVE: The aim of this study was to evaluate the effect of suturation (tonsillary fossa closure) plus Surgicel application on postoperative bleeding and pain after tonsillectomies performed using a classical dissection method. STUDY DESIGN: A prospective, randomized, double-blind, clinical trial was performed on 760 patients undergoing tonsillectomy or adenotonsillectomy during a 5-year period. METHODS: After excluding patients with hemorrhagic disorder, chronic disease, and peritonsillar abscess, both tonsils were removed via classic dissection technique (cold knife or blunt dissection) and then electrocauterized for hemostasis...
August 28, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28842479/tnf-%C3%AE-promotes-nuclear-enrichment-of-tonebp-nfat5-to-selectively-control-inflammatory-but-not-osmoregulatory-responses-in-nucleus-pulposus-cells
#13
Zariel I Johnson, Alexandra C Doolittle, Joseph W Snuggs, Irving M Shapiro, Christine L Le Maitre, Makarand V Risbud
Intervertebral disc degeneration (IDD) causes chronic back pain and is linked to production of proinflammatory molecules by nucleus pulposus (NP) and other disc cells. Activation of TonicityResponsive Enhancer-Binding Protein (TonEBP)/NFAT5 by non-osmotic stimuli, including pro-inflammatory molecules, occurs in cells involved in immune response. However, whether inflammatory stimuli activate TonEBP in NP cells and if TonEBP controls inflammation during IDD is unknown. We show that TNF-α, but not IL-1β or LPS, promoted nuclear enrichment of TonEBP protein...
August 25, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28837503/therapeutic-potential-for-leukocyte-elastase-in-chronic-pain-states-harboring-a-neuropathic-component
#14
Kiran Kumar Bali, Rohini Kuner
Neuropathic pain is an integral component of several chronic pain conditions and poses a major health problem worldwide. Despite emerging understanding of mechanisms behind neuropathic pain, the available treatment options are still limited in efficacy or associated with side effects, therefore making it necessary to find viable alternatives. In a genetic screen, we recently identified SerpinA3N, a serine protease inhibitor secreted in response to nerve damage by the DRG neurons and we showed that SerpinA3N acts against induction of neuropathic pain by inhibiting the T-cell- and neutrophil-derived protease, leucocyte elastase (LE)...
August 19, 2017: Pain
https://www.readbyqxmd.com/read/28836121/nerve-decompression-improves-spinal-synaptic-plasticity-of-opioid-receptors-for-pain-relief
#15
To-Jung Tseng, Ming-Ling Yang, Yu-Lin Hsieh, Miau-Hwa Ko, Sung-Tsang Hsieh
Nerve decompression is an essential therapeutic strategy for pain relief clinically; however, its potential mechanism remains poorly understood. Opioid analgesics acting on opioid receptors (OR) within the various regions of the nervous system have been used widely for pain management. We therefore hypothesized that nerve decompression in a neuropathic pain model of chronic constriction injury (CCI) improves the synaptic OR plasticity in the dorsal horn, which is in response to alleviate pain hypersensitivity...
August 23, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28831329/targeted-muscle-reinnervation-to-improve-pain-prosthetic-tolerance-and-bioprosthetic-outcomes-in-the-amputee
#16
REVIEW
J Byers Bowen, Corinne E Wee, Jaclyn Kalik, Ian L Valerio
Scope and Significance: There are ∼185,000 amputations each year and nearly 2 million amputees currently living in the United States. Approximately 25% of these amputees will experience chronic pain issues secondary to localized neuroma pain and/or phantom limb pain. Problem: The significant discomfort caused by neuroma and phantom limb pain interferes with prosthesis wear, subjecting amputees to the additional physical and psychological morbidity associated with chronic immobility. Although numerous neuroma treatments are described, none of these methods are consistently effective in eliminating symptoms...
August 1, 2017: Advances in Wound Care
https://www.readbyqxmd.com/read/28828606/glycine-transporters-and-its-coupling-with-nmda-receptors
#17
Francisco Zafra, Ignacio Ibáñez, David Bartolomé-Martín, Dolores Piniella, Marina Arribas-Blázquez, Cecilio Giménez
Glycine plays two roles in neurotransmission. In caudal areas like the spinal cord and the brainstem, it acts as an inhibitory neurotransmitter, but in all regions of the CNS, it also works as a co-agonist with L-glutamate at N-methyl-D-aspartate receptors (NMDARs). The glycine fluxes in the CNS are regulated by two specific transporters for glycine, GlyT1 and GlyT2, perhaps with the cooperation of diverse neutral amino acid transporters like Asc-1 or SNAT5/SN2. While GlyT2 and Asc-1 are neuronal proteins, GlyT1 and SNAT5 are mainly astrocytic, although neuronal forms of GlyT1 also exist...
2017: Advances in Neurobiology
https://www.readbyqxmd.com/read/28828592/drug-delivery-for-the-treatment-of-endometriosis-and-uterine-fibroids
#18
REVIEW
David R Friend
Endometriosis and uterine fibroids (also known as uterine leiomyomas) are serious medical conditions affecting large numbers of women worldwide. Many women are asymptomatic but those with symptoms require medical intervention to relieve chronic pain and dysmenorrhea and to address infertility. Drug delivery has played a role in reducing some of the symptoms associated with endometriosis and uterine fibroids. Use of drug delivery systems for both conditions can roughly be divided into two categories: (1) existing systems designed for other indications such as contraception for symptomatic relief and (2) development of novel systems aimed at addressing some of the underlying biochemical changes associated with endometriosis and uterine fibroids such as oxidative stress, angiogenesis, and matrix degradation...
August 21, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28827659/tdag8-trpv1-and-asic3-involved-in-establishing-hyperalgesic-priming-in-experimental-rheumatoid-arthritis
#19
Wei-Shan Hsieh, Chia-Chi Kung, Shir-Ly Huang, Shih-Chang Lin, Wei-Hsin Sun
Rheumatoid arthritis (RA), characterized by chronic inflammation of synovial joints, is often associated with ongoing pain and increased pain sensitivity. High hydrogen ion concentration (acidosis) found in synovial fluid in RA patients is associated with disease severity. Acidosis signaling acting on proton-sensing receptors may contribute to inflammation and pain. Previous studies focused on the early phase of arthritis (<5 weeks) and used different arthritis models, so elucidating the roles of different proton-sensing receptors in the chronic phase of arthritis is difficult...
August 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28822016/in-situ-imaging-reveals-properties-of-purinergic-signalling-in-trigeminal-sensory-ganglia-in-vitro
#20
Arletta Nowodworska, Arn M J M van den Maagdenberg, Andrea Nistri, Elsa Fabbretti
Chronic pain is supported by sterile inflammation that induces sensitisation of sensory neurons to ambient stimuli including extracellular ATP acting on purinergic P2X receptors. The development of in vitro methods for drug screening would be useful to investigate cell crosstalk and plasticity mechanisms occurring during neuronal sensitisation and sterile neuroinflammation. Thus, we studied, at single-cell level, membrane pore dilation based on the uptake of a fluorescent probe following sustained ATP-gated P2X receptor function in neurons and non-neuronal cells of trigeminal ganglion cultures from wild-type (WT) and R192Q CaV2...
August 18, 2017: Purinergic Signalling
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