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https://www.readbyqxmd.com/read/28735027/translation-of-an-injectable-triple-interpenetrating-network-hydrogel-for-intervertebral-disc-regeneration-in-a-goat-model
#1
Sarah E Gullbrand, Thomas P Schaer, Prateek Agarwal, Justin R Bendigo, George R Dodge, Weiliam Chen, Dawn M Elliott, Robert L Mauck, Neil R Malhotra, Lachlan J Smith
Degeneration of the intervertebral discs is a progressive cascade of cellular, compositional and structural changes that is frequently associated with low back pain. As the first signs of disc degeneration typically arise in the disc's central nucleus pulposus (NP), augmentation of the NP via hydrogel injection represents a promising strategy to treat early to mid-stage degeneration. The purpose of this study was to establish the translational feasibility of a triple interpenetrating network hydrogel composed of dextran, chitosan, and teleostean (DCT) for augmentation of the degenerative NP in a preclinical goat model...
July 19, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28734941/sleep-chronic-pain-and-opioid-risk-for-apnea
#2
REVIEW
Serguei Marshansky, Pierre Mayer, Dorrie Rizzo, Marc Baltzan, Ronald Denis, Gilles J Lavigne
Pain is an unwelcome sleep partner. Pain tends to erode sleep quality and alter the sleep restorative process in vulnerable patients. It can contribute to next-day sleepiness and fatigue, affecting cognitive function. Chronic pain and the use of opioid medications can also complicate the management of sleep disorders such as insomnia (difficulty falling and/or staying asleep) and sleep-disordered breathing (sleep apnea). Sleep problems can be related to various types of pain, including sleep headache (hypnic headache, cluster headache, migraine) and morning headache (transient tension type secondary to sleep apnea or to sleep bruxism or tooth grinding) as well as periodic limb movements (leg and arm dysesthesia with pain)...
July 19, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28734765/ampakines-and-morphine-provide-complementary-analgesia
#3
Yongjun Sun, Kevin Liu, Erik Martinez, Jahrane Dale, Dong Huang, Jing Wang
Glutamate signaling in the central nervous system is known to play a key role in pain regulation. AMPAkines can enhance glutamate signaling through α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors. previous studies have shown that AMPAkines are effective analgesic agents, and their site of action is likely in the brain. It is not known, however, if AMPAkines can provide complementary analgesia in combination with opioids, the most commonly used analgesics. Here, we show that the co-administration of an AMPAkine with morphine can provide additional analgesia, both in naïve rats and in rats that experience postoperative pain...
July 19, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28732166/mel-n16-a-series-of-novel-endomorphin-analogs-with-good-analgesic-activity-and-a-favorable-side-effect-profile
#4
Xin Liu, Long Zhao, Yuan Wang, Jingjing Zhou, Dan Wang, Yixin Zhang, Xianghui Zhang, Zhaojuan Wang, Dongxu Yang, Lingyun Mou, Rui Wang
Opioid peptides are neuromodulators that bind to opioid receptors and reduce pain sensitivity. Endomorphins are one of the most active endogenous opioid peptides, and they have good affinity and selectivity toward the μ opioid receptor. However, their clinical usage is hindered by their inability to cross the blood-brain barrier, and their poor in vivo activity after peripheral injection. In order to overcome these defects, we have designed and synthesized a series of novel endomorphin analogs with multiple site modifications...
July 21, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28731977/interventions-for-neuropathic-pain-an-overview-of-systematic-reviews
#5
Svjetlana Dosenovic, Antonia Jelicic Kadic, Maja Miljanovic, Marina Biocic, Krste Boric, Marija Cavar, Nikolina Markovina, Katarina Vucic, Livia Puljak
Numerous interventions for neuropathic pain (NeuP) are available, but its treatment remains unsatisfactory. We systematically summarized evidence from systematic reviews (SRs) of randomized controlled trials on interventions for NeuP. Five electronic databases were searched up to March 2015. Study quality was analyzed using A Measurement Tool to Assess Systematic Reviews. The most common interventions in 97 included SRs were pharmacologic (59%) and surgical (15%). The majority of analyzed SRs were of medium quality...
August 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28731960/perceived-pain-extent-is-not-associated-with-widespread-pressure-pain-sensitivity-clinical-features-related-disability-anxiety-or-depression-in-women-with-episodic-migraine
#6
Cesar Fernández-de-Las-Peñas, Deborah Falla, María Palacios-Ceña, Stella Fuensalidad-Novo, Jose L Arias-Buría, Alessandro Schneebeli, Lars Arend-Nielsen, Marco Barbero
OBJECTIVE: People with migraine present with varying pain extent and an expanded distribution of perceived pain may reflect central sensitization. The relationship between pain extent and clinical features, psychological outcomes, related-disability and pressure pain sensitivity in migraine has been poorly investigated. Our aim was to investigate whether the perceived pain extent, assessed from pain drawings, relates to measures of pressure pain sensitivity, clinical, psychological outcomes, and related-disability in women with episodic migraine...
July 20, 2017: Clinical Journal of Pain
https://www.readbyqxmd.com/read/28729524/cardiac-arrest-following-drug-abuse-with-intravenous-tapentadol-case-report-and-literature-review
#7
Misbahuddin Khaja, George Lominadze, Konstantin Millerman
BACKGROUND Tapentadol is a centrally acting opioid analgesic, with a dual mode of action, as a norepinephrine reuptake inhibitor and an agonist of the μ-opioid receptor (MOR). Tapentadol is used for the management of musculoskeletal pain, and neuropathic pain associated with diabetic peripheral neuropathy. CASE REPORT A 32-year-old woman attended hospital for evaluation of an intractable headache. Computed tomography and magnetic resonance imaging of the brain were negative. She was found unresponsive in the bathroom on the day following hospital admission, and despite resuscitative measures, the patient died following cardiac arrest...
July 21, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28729113/activation-of-rage-stat3-pathway-by-methylglyoxal-contributes-to-spinal-central-sensitization-and-persistent-pain-induced-by-bortezomib
#8
Jia-You Wei, Cui-Cui Liu, Han-Dong Ouyang, Chao Ma, Man-Xiu Xie, Meng Liu, Wan-Long Lei, Huan-Huan Ding, Shao-Ling Wu, Wen-Jun Xin
Bortezomib is a first-line chemotherapeutic drug widely used for multiple myeloma and other nonsolid malignancies. Although bortezomib-induced persistent pain is easily diagnosed in clinic, the pathogenic mechanism remains unclear. Here, we studied this issue with use of a rat model of systemic intraperitoneal administration of bortezomib for consecutive 5days. Consisted with our previous study, we found that bortezomib treatment markedly induced mechanical allodynia in rats. Furthermore, we first found that bortezomib treatment significantly induced the upregulation of methylglyoxal in spinal dorsal horn of rats...
July 18, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28729077/white-matter-microstructure-degenerates-in-patients-with-postherpetic-neuralgia
#9
Fuxiang Chen, Fuyong Chen, Zhanfang Shang, Yuan Shui, Guorong Wu, Chen Liu, Zhangya Lin, Yuanxiang Lin, Lianghong Yu, Dezhi Kang, Wei Tao, Yongjie Li
OBJECTIVE: The central mechanisms underlying postherpetic neuralgia (PHN) pain remain unknown. The primary purpose of this study was to identify microstructural white matter changes closely related to the PHN pain by means of diffusion tensor imaging (DTI) and tract-based spatial statistics (TBSS) analysis. METHODS: DTI data of the brains were obtained from 8 PHN patients and 8 healthy controls (HC) that were matched in age, gender, and educational level. DTI metrics, including fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD), were separately compared between the two groups using TBSS analysis to detect subtle microstructural changes...
July 17, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28727703/intrathecal-morphine-improves-hemodynamic-parameters-and-analgesia-in-patients-undergoing-aortic-valve-replacement-surgery-a-prospective-double-blind-randomized-trial
#10
Hamed Elgendy, Hatem A R Helmy
BACKGROUND: Intrathecal morphine (ITM) has been used in hopes of providing good postoperative analgesia in cardiac surgery. Little is known about its use in isolated aortic valve replacement surgery. OBJECTIVES: To evaluate the effects of 7 µ/kg ITM administration in aortic valve replacement in regards to hemodynamics, pain score, and postoperative complications when compared to general anesthesia alone. STUDY DESIGN: A randomized, double-blind trial...
July 2017: Pain Physician
https://www.readbyqxmd.com/read/28725942/l-arginine-supplementation-prevents-allodynia-and-hyperalgesia-in-painful-diabetic-neuropathic-rats-by-normalizing-plasma-nitric-oxide-concentration-and-increasing-plasma-agmatine-concentration
#11
Lusliany J Rondón, M C Farges, N Davin, B Sion, A M Privat, M P Vasson, A Eschalier, C Courteix
PURPOSE: Neuropathic pain is a common diabetic complication. It is characterized by symptoms of spontaneous and stimulus-evoked pain including hyperalgesia and allodynia. L-Arginine is a common precursor of many metabolites of biological interest, in particular, nitric oxide (NO), ornithine, and hence polyamines. In central nervous system, NO, glutamate, and polyamines share an N-methyl-D-aspartate (NMDA) receptor-mediated effect. We hypothesized that a variation in arginine metabolism caused by diabetes may contribute to development and maintenance of neuropathic pain and to the worsening of clinical and biological signs of diabetes...
July 19, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28725623/isolation-and-characterization-of-antimicrobial-compound-from-the-stem-bark-of-the-traditionally-used-medicinal-plant-adenium-obesum
#12
Mohammed Sohail Akhtar, Mohammad Amzad Hossain, Sadri Abdullah Said
BACKGROUND: Medicinal plants constitute a natural reservoir for medicines worldwide. They serve mainstream therapeutics and are central in folklore medicine. In case of Adenium obesum (Lav, Apocynaceae), indigenous people of Oman use it for the treatment of venereal diseases, wounds, skin diseases, headaches, muscle pain as well as joint pain; yet, the active ingredients have not been classified. To screened the antioxidant and antimicrobial activities of an identified compound that we isolated from the highest active chloroform extract...
July 2017: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/28724992/opposite-bidirectional-shifts-in-excitation-and-inhibition-in-specific-types-of-dorsal-horn-interneurons-are-associated-with-spasticity-and-pain-post-sci
#13
Olga Kopach, Volodymyr Medvediev, Volodymyr Krotov, Anya Borisyuk, Vitaliy Tsymbaliuk, Nana Voitenko
Spasticity, a common complication after spinal cord injury (SCI), is frequently accompanied by chronic pain. The physiological origin of this pain (critical to its treatment) remains unknown, although spastic motor dysfunction has been related to the hyperexcitability of motoneurons and to changes in spinal sensory processing. Here we show that the pain mechanism involves changes in sensory circuits of the dorsal horn (DH) where nociceptive inputs integrate for pain processing. Spasticity is associated with the DH hyperexcitability resulting from an increase in excitation and disinhibition occurring in two respective types of sensory interneurons...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724599/a-case-of-congenital-coronary-pulmonary-fistulas-presenting-as-spontaneous-mediastinal-haemorrhage
#14
Guramrinder Singh Thind, Yashwant Agrawal, Jagadeesh K Kalavakunta, Robert Lapenna
Coronary artery fistulas are rare anomalous vascular connections between coronary arteries and a cardiac chamber or a central vessel, without an intervening capillary bed. Coronary-pulmonary fistulas are a distinct subset of coronary artery fistulas. We present the case of a previously healthy 63-year-old-man who presented with chest pain and was found to have mediastinal haemorrhage. Upon further investigations, he was found to have multiple coronary-pulmonary fistulas with pseudoaneurysm formation in three of the fistulas...
July 19, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28722815/influence-of-morphine-and-naloxone-on-pain-modulation-in-rheumatoid-arthritis-chronic-fatigue-syndrome-fibromyalgia-and-controls-a-double-blind-randomized-placebo-controlled-cross-over-study
#15
Linda Hermans, Jo Nijs, Patrick Calders, Luc De Clerck, Greta Moorkens, Guy Hans, Sofie Grosemans, Tine Roman De Mettelinge, Joanna Tuynman, Mira Meeus
BACKGROUND: Impaired pain inhibitory and enhanced pain facilitatory mechanisms are repeatedly reported in patients with central sensitization pain. However, the exact effects of frequently prescribed opioids on central pain modulation are still unknown. METHODS: A randomized, double-blind, placebo-controlled cross-over trial was carried out. Ten CFS/FM patients, 11 RA patients and 20 controls were randomly allocated to the experimental (10 mg morphine or 0.2 mg/ml Naloxone) and placebo (2 ml Aqua) group...
July 19, 2017: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/28722693/ikk-nf-%C3%AE%C2%BAb-dependent-satellite-glia-activation-induces-spinal-cord-microglia-activation-and-neuropathic-pain-after-nerve-injury
#16
Hyoungsub Lim, Hyunkyoung Lee, Kyungchul Noh, Sung Joong Lee
Increasing evidence indicates that both microglia and satellite glial cell (SGC) activation play causal roles in neuropathic pain development after peripheral nerve injury; however, the activation mechanisms and their contribution to neuropathic pain remain elusive. To address this issue, we generated Ikkβ conditional knockout mice (Cnp-Cre/Ikkβ; cIkkβ) in which IKK/NF-κB-dependent proinflammatory SGC activation was abrogated. In these mice, nerve injury-induced spinal cord microglia activation and pain hypersensitivity were significantly attenuated compared to those in control mice...
May 30, 2017: Pain
https://www.readbyqxmd.com/read/28722618/clinical-evidence-of-acute-mesoamerican-nephropathy
#17
Rebecca S B Fischer, Sreedhar Mandayam, Denis Chavarria, Chandan Vangala, Melissa N Garcia, Linda L Garcia, Lesbia Palma, Felix Garcia, Ramón García-Trabanino, Kristy O Murray
Mesoamerican nephropathy (MeN), an epidemic of unexplained kidney disease in Central America, affects mostly young, healthy individuals. Its etiology is a mystery that requires urgent investigation. Largely described as a chronic kidney disease (CKD), no acute clinical scenario has been characterized. An understanding of the early disease process could elucidate an etiology and guide treatment and prevention efforts. We sought to document the earliest clinical signs in patients with suspected MeN in a high-risk population in Nicaragua...
July 17, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28722246/delta-9-tetrahydrocannabinol-decreases-masticatory-muscle-sensitization-in-female-rats-through-peripheral-cannabinoid-receptor-activation
#18
H Wong, S Hossain, B E Cairns
BACKGROUND: This study investigated whether intramuscular injection of delta-9-tetrahydrocannabinol (THC), by acting on peripheral cannabinoid (CB) receptors, could decrease nerve growth factor (NGF)-induced sensitization in female rat masseter muscle; a model which mimics the symptoms of myofascial temporomandibular disorders. METHODS: Immunohistochemistry was used to explore the peripheral expression of cannabinoid receptors in the masseter muscle while behavioural and electrophysiology experiments were employed to assess the functional effects of intramuscular injection of THC...
July 18, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28722116/opioids-for-cancer-related-pain-in-children-and-adolescents
#19
REVIEW
Philip J Wiffen, Tess E Cooper, Anna-Karenia Anderson, Andrew L Gray, Marie-Claude Grégoire, Gustaf Ljungman, Boris Zernikow
BACKGROUND: Pain is a common feature of childhood and adolescence around the world, and for many young people, that pain is chronic. The World Health Organization (WHO) guidelines for pharmacological treatments for children's persisting pain acknowledge that pain in children is a major public health concern of high significance in most parts of the world. Views on children's pain have changed over time and relief of pain is now seen as important. In the past, pain was largely dismissed and was frequently left untreated, and it was assumed that children quickly forgot about painful experiences...
July 19, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28722022/opioid-release-after-high-intensity-interval-training-in-healthy-human-subjects
#20
Tiina Saanijoki, Lauri Tuominen, Jetro J Tuulari, Lauri Nummenmaa, Eveliina Arponen, Kari Kalliokoski, Jussi Hirvonen
Central opioidergic mechanisms may modulate the positive effects of physical exercise such as mood elevation and stress reduction. How exercise intensity and concomitant affective changes affect central opioidergic responses is unknown. We studied the effects of acute physical exercise on the cerebral μ-opioid receptors (MOR) of 22 healthy recreationally active males using positron emission tomography (PET) and the MOR-selective radioligand [(11)C]carfentanil. MOR binding was measured in three conditions on separate days: after a 60-min aerobic moderate-intensity exercise session, after a high-intensity interval training (HIIT) session, and after rest...
July 19, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
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