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https://www.readbyqxmd.com/read/28429337/from-acute-to-chronic-pain-tapentadol-in-the-progressive-stages-of-this-disease-entity
#1
F Coluzzi, D Fornasari, J Pergolizzi, P Romualdi
OBJECTIVE: Chronic pain is now recognized as a neural disease, which results from a maladaptive functional and structural transformation process occurring over time. In its chronic phase, pain is not just a symptom but also a disease entity. Therefore, pain must be properly addressed, as many patients still report unsatisfactory pain control despite on-going treatment. The selection of the therapy - taking into account the pathophysiological mechanisms of pain - and the right timing can result in a successful analgesic outcome...
April 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28428505/-neurolysis-and-spinal-analgesia-in-cancer-pain-management
#2
Seiji Hattori, Junko Tachibana
Cancer pain appears as a complex pain and often progressive.WhenWHO pain management strategy and/or palliative care failed to relieve their pain, patients are given high dose opioids or anonymous adjuvant drugs and have no chance to meet specialized pain treatment. This section briefly covers the outline of neurolysis and spinal analgesia for these cancer patients with severe pain. Purpose of nerve block and neurolysis are to block the incoming signal of pain in order to reduce pain, reduce analgesic dose, recover ADL, and finally to be discharged from the hospital...
April 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/28418966/clinical-effectiveness-and-safety-of-intraoperative-methadone-in-patients-undergoing-posterior-spinal-fusion-surgery-a-randomized-double-blinded-controlled-trial
#3
Glenn S Murphy, Joseph W Szokol, Michael J Avram, Steven B Greenberg, Torin D Shear, Mark A Deshur, Jeffery S Vender, Jessica Benson, Rebecca L Newmark
BACKGROUND: Patients undergoing spinal fusion surgery often experience severe pain during the first three postoperative days. The aim of this parallel-group randomized trial was to assess the effect of the long-duration opioid methadone on postoperative analgesic requirements, pain scores, and patient satisfaction after complex spine surgery. METHODS: One hundred twenty patients were randomized to receive either methadone 0.2 mg/kg at the start of surgery or hydromorphone 2 mg at surgical closure...
May 2017: Anesthesiology
https://www.readbyqxmd.com/read/28416174/-ultrasound-guided-quadratus-lumborum-block-for-analgesia-after-cesarean-delivery-case-series
#4
Ilana Sebbag, Fatemah Qasem, Shalini Dhir
INTRODUCTION: The majority of women having planned cesarean section receive spinal anesthesia for the procedure. Typically, spinal opioids are administered during the same time as a component of multimodal analgesia to provide pain relief in the 16-24h period postoperatively. The quadratus lumborum block is a regional analgesic technique that blocks T5-L1 nerve branches and has an evolving role in postoperative analgesia for lower abdominal surgeries and may be a potential alternative to spinal opioids...
April 14, 2017: Revista Brasileira de Anestesiologia
https://www.readbyqxmd.com/read/28415063/neuron-restrictive-silencer-factor-mediated-downregulation-of-%C3%AE-opioid-receptor-contributes-to-the-reduced-morphine-analgesia-in-bone-cancer-pain
#5
Chao Zhu, Jun Tang, Tan Ding, Lei Chen, Wei Wang, Xiao-Peng Mei, Xiao-Tao He, Wen Wang, Li-Dong Zhang, Yu-Lin Dong, Zhuo-Jing Luo
Bone cancer pain has been reported to have unique mechanisms and is resistant to morphine treatment. Recent studies have indicated that neuron-restrictive silencer factor (NRSF) plays a crucial role in modulating the expression of the μ-opioid receptor (MOR) gene. The present study elucidates the regulatory mechanisms of MOR and its ability to affect bone cancer pain. Using a sarcoma-inoculated murine model, pain behaviors that represent continuous or breakthrough pain were evaluated. Expression of NRSF in the dorsal root ganglion (DRG) and spinal dorsal horn was quantified at the transcriptional and translational levels, respectively...
May 2017: Pain
https://www.readbyqxmd.com/read/28412373/mechanistic-evaluation-of-tapentadol-in-reducing-the-pain-perception-using-in-vivo-brain-and-spinal-cord-microdialysis-in-rats
#6
Vijay Benade, Ramakrishna Nirogi, Gopinadh Bhyrapuneni, Saivishal Daripelli, Ganesh Ayyanki, Shantaveer Irappanavar, Ranjithkumar Ponnamaneni, Arunkumar Manoharan
Role of monoamine neurotransmitters in the modulation of emotional and pain processing in spinal cord and brain regions is not well known. Tapentadol, a norepinephrine reuptake inhibitor with µ-opioid receptor agonistic activity has recently been introduced for the treatment of moderate to severe pain. The objective of the present study was to examine the effects of tapentadol on modulation of monoamines in the prefrontal cortex and dorsal horn using brain microdialysis. Tapentadol was administered intraperitoneally at 4...
April 12, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28410599/the-role-of-vitamin-c-in-the-treatment-of-pain-new-insights
#7
REVIEW
Anitra C Carr, Cate McCall
The vitamin C deficiency disease scurvy is characterised by musculoskeletal pain and recent epidemiological evidence has indicated an association between suboptimal vitamin C status and spinal pain. Furthermore, accumulating evidence indicates that vitamin C administration can exhibit analgesic properties in some clinical conditions. The prevalence of hypovitaminosis C and vitamin C deficiency is high in various patient groups, such as surgical/trauma, infectious diseases and cancer patients. A number of recent clinical studies have shown that vitamin C administration to patients with chronic regional pain syndrome decreases their symptoms...
April 14, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28405033/post-caesarean-analgesia-what-is-new
#8
REVIEW
Sukhyanti Kerai, Kirti Nath Saxena, Bharti Taneja
Adequate post-operative analgesia after caesarean section (CS) is vital as it impacts the distinct surgical recovery requirements of the parturient. Although newer analgesic modalities and drugs for post-caesarean analgesia have been introduced over the recent years, review of the literature suggests suggests that we are far from achieving the goals of optimum post-operative analgesia. We conducted a systematic review of recent advances in modalities for post-caesarean analgesia. After systematic search and quality assessment of studies, we included a total of 51 randomised controlled trials that evaluated the role of opioids, transversus abdominis plane (TAP) block, wound infiltration/infusion, ketamine, gabapentin and ilioinguinal-iliohypogastric nerve block (II-IH NB) for post-caesarean analgesia...
March 2017: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/28403408/systemic-lidocaine-fails-to-improve-postoperative-morphine-consumption-postoperative-recovery-and-quality-of-life-in-patients-undergoing-posterior-spinal-arthrodesis-a-double-blind-randomized-placebo-controlled-trial
#9
G Dewinter, P Moens, S Fieuws, B Vanaudenaerde, M Van de Velde, S Rex
Background.: It is inconclusive whether the perioperative administration of systemic lidocaine provides effective postoperative analgesia and enhances recovery in major orthopaedic surgery. We hypothesised that in adolescent and adult patients undergoing posterior spinal arthrodesis, a perioperative lidocaine infusion would reduce opioid requirements during the first 24 postoperative h. Methods.: 70 patients undergoing posterior arthrodesis were enrolled in this prospective, randomised, double-blind, placebo-controlled clinical trial...
April 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28399049/evaluation-of-gabapentin-and-clonidine-use-in-children-following-spinal-fusion-surgery-for-idiopathic-scoliosis-a-retrospective-review
#10
Dinesh K Choudhry, B Randall Brenn, Karen Sacks, Suken Shah
BACKGROUND: Opioids are the mainstay of therapy for pain relief following posterior spinal fusion (PSF) surgery. Various adjunctive medications are being used to augment analgesia and to reduce opioid-related side effects. At our institution, we have sequentially added 2 adjuncts to a standard morphine patient-controlled analgesia (PCA) regimen. The goal of our study was to evaluate pain control and the benefit of gabapentin and the combination of gabapentin and clonidine, whereas morphine PCA was in use in children following PSF surgery...
April 10, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28397700/narcotic-bowel-syndrome
#11
REVIEW
Adam D Farmer, Jayne Gallagher, Caroline Bruckner-Holt, Qasim Aziz
Narcotic bowel syndrome is characterised by worsening abdominal pain in the context of escalating or continuous opioid therapy. Although narcotic bowel syndrome is rarely diagnosed, given the current epidemic of opioid use, it is likely to be under-recognised. The underlying pathophysiological mechanisms of narcotic bowel syndrome are incompletely understood; however, opioid-induced hyperalgesia is likely to be a central facet. The putative mechanisms of hyperalgesia include activation of bimodal opioid regulatory systems, counter-regulatory mechanisms, neuroinflammation, opioid facilitation, and interactions of the N-methyl D-aspartate receptor with opioids at the level of the spinal cord...
May 2017: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28396242/long-term-effects-of-repeated-injections-of-local-anesthetic-with-or-without-corticosteroid-for-lumbar-spinal-stenosis-a-randomized-trial
#12
Janna L Friedly, Bryan A Comstock, Judith A Turner, Patrick J Heagerty, Richard A Deyo, Zoya Bauer, Andrew L Avins, Srdjan S Nedeljkovic, David R Nerenz, Xu Rita Shi, Thiru Annaswamy, Christopher J Standaert, Matthew Smuck, David J Kennedy, Venu Akuthota, David Sibell, Ajay D Wasan, Felix Diehn, Pradeep Suri, Sean D Rundell, Larry Kessler, Allen S Chen, Jeffrey G Jarvik
OBJECTIVE: To determine the overall long term effectiveness of treatment with epidural corticosteroid injections for lumbar central spinal stenosis and the impact of repeat injections, including crossover injections, on outcomes through 12 months. DESIGN: Multicenter, double-blind, randomized trial comparing epidural injections of corticosteroid plus lidocaine versus lidocaine alone SETTING: 16 U.S. clinical sites PARTICIPANTS: 400 participants with imaging-confirmed lumbar central spinal stenosis INTERVENTIONS: Participants were randomized to receive either epidural injections with corticosteroid plus lidocaine or lidocaine alone with the option of blinded crossover after 6 weeks to receive the alternate treatment...
April 7, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28393429/lack-of-analgesic-synergy-of-the-cholecystokinin-receptor-antagonist-proglumide-and-spinal-cord-stimulation-for-the-treatment-of-neuropathic-pain-in-rats
#13
Shinsuke Inoue, Lisa M Johanek, Kathleen A Sluka
OBJECTIVE: Neuropathic pain is difficult to manage and treat. Spinal cord stimulation (SCS) has become an established procedure for treating chronic neuropathic pain that is refractory to pharmacological therapy. In order to achieve better analgesia, a number of studies have evaluated the effectiveness of combining drug therapy with SCS. Cholecystokinin antagonists, such as proglumide, enhance the analgesic efficacy of endogenous opioids in animal models of pain. We previously reported that both systemic and spinal administration of proglumide enhances analgesia produced by both low- and high-frequency transcutaneous electrical nerve stimulation (TENS)...
April 10, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28381725/pursuit-of-neurotransmitter-functions-being-attracted-with-fascination-of-the-synapse
#14
Shiro Konishi
 In the beginning of the 1970s, only two chemical substances, acetylcholine and γ-aminobutyric acid (GABA), had been definitely established as neurotransmitters. Under such circumstances, I started my scientific career in Professor Masanori Otsuka's lab searching for the transmitter of primary sensory neurons. Until 1976, lines of evidence had accumulated indicating that the undecapeptide substance P could be released as a transmitter from primary afferent fibers into spinal synapses, although the substance P-mediated synaptic response had yet to be identified...
2017: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
https://www.readbyqxmd.com/read/28375916/neuropathic-pain
#15
Lindsay A Zilliox
PURPOSE OF REVIEW: Neuropathic pain is a frequently encountered condition that is often resistant to treatment and is associated with poor patient satisfaction of their treatment. Several medications have been shown to be effective in treating neuropathic pain associated with diabetic neuropathy and postherpetic neuralgia, and these medications are often used to treat neuropathic pain associated with other conditions as well. This article summarizes the diagnosis and assessment of patients with neuropathic pain as well as available pharmacologic and interventional treatment options...
April 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28365862/spinal-mechanisms-of-itch-transmission
#16
REVIEW
Devin M Barry, Admire Munanairi, Zhou-Feng Chen
Peripheral itch stimuli are transmitted by sensory neurons to the spinal cord dorsal horn, which then transmits the information to the brain. The molecular and cellular mechanisms within the dorsal horn for itch transmission have only been investigated and identified during the past ten years. This review covers the progress that has been made in identifying the peptide families in sensory neurons and the receptor families in dorsal horn neurons as putative itch transmitters, with a focus on gastrin-releasing peptide (GRP)-GRP receptor signaling...
April 1, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28363796/structure-constrained-endomorphin-analogs-display-differential-antinociceptive-mechanisms-in-mice-after-spinal-administration
#17
Yuan Wang, Jingjing Zhou, Xin Liu, Long Zhao, Zhaojuan Wang, Xianghui Zhang, Kezhou Wang, Linqing Wang, Rui Wang
We previously reported a series of novel endomorphin analogs with unnatural amino acid modifications. These analogs display good binding affinity and functional activity toward the μ opioid receptor (MOP). In the present study, we further investigated the spinal antinociceptive activity of these compounds. The analogs were potent in several nociceptive models. Opioid antagonists and antibodies against several endogenous opioid peptides were used to determine the mechanisms of action of these peptides. Intrathecal pretreatment with naloxone and β-funaltrexamine (β-FNA) effectively inhibited analog-induced analgesia, demonstrating that activity of the analogs is regulated primarily through MOP...
March 29, 2017: Peptides
https://www.readbyqxmd.com/read/28361827/comparative-antinociceptive-effect-of-arachidonylcyclopropylamide-a-cannabinoid-1-receptor-agonist-lignocaine-a-local-anaesthetic-agent-following-direct-intrawound-administration-in-rats
#18
Rahul Kumar, Pranav Prasoon, Mayank Gautam, Subrata Basu Ray
BACKGROUND & OBJECTIVES: Treatment of inflammatory pain with opioids is accompanied by unpleasant and, at times, life-threatening side effects.Cannabis produces antinociception as well as psychotropic effects. It was hypothesized that peripheral cannabinoid receptors outside the central nervous system could be selectively activated for relief of pain. This study was undertaken to measure the antinociceptive effect of type 1 cannabinoid receptor (CB1r) agonist arachidonylcyclopropylamide (ACPA) in a rat model of inflammatory pain after intrawound administration and the effects were compared with lignocaine...
November 2016: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/28352316/monocyte-chemoattractant-protein-1-contributes-to-morphine-tolerance-in-rats-with-cancer-induced-bone-pain
#19
Lei Liu, Xiu-Juan Gao, Chun-Guang Ren, Ji-Hua Hu, Xian-Wen Liu, Ping Zhang, Zong-Wang Zhang, Zhi-Jian Fu
Cancer-induced bone pain can severely compromise the life quality of patients, while tolerance limits the use of opioids in the treatment of cancer pain. Monocyte chemoattractant protein-1 (MCP-1) is known to contribute to neuropathic pain. However, the role of spinal MCP-1 in the development of morphine tolerance in patients with cancer-induced bone pain remains unclear. The aim of the present study was to investigate the role of spinal MCP-1 in morphine tolerance in bone cancer pain rats (MTBP rats). Bone cancer pain was induced by intramedullary injection of Walker 256 cells into the tibia of the rats, while morphine tolerance was induced by continuous intrathecal injection of morphine over a period of 9 days...
February 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28345745/in-vitro-and-in-vivo-assessment-of-the-abuse-potential-of-pf614-a-novel-bio-md%C3%A2-prodrug-of-oxycodone
#20
D Lynn Kirkpatrick, William K Schmidt, Ricardo Morales, John Cremin, Julie Seroogy, Craig Husfeld, Thomas Jenkins
OBJECTIVE: The need for pain medication which will not lead to abuse is well recognized. Ensysce has designed prodrug analogs of the commonly used pain medications including hydromorphone, oxycodone (OC), hydrocodone, and morphine that limit their use to oral delivery, two of which are in clinical development. This study was undertaken to demonstrate that PF614, an extended-release prodrug of OC, allows the release of OC as designed when delivered orally, yet it resists ex vivo extraction with household chemicals and is pharmacologically inactive when administered by nonoral routes (nasal and parenteral), thereby substantially reducing its intravenous (IV) and intranasal abuse potential...
January 2017: Journal of Opioid Management
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