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https://www.readbyqxmd.com/read/28098360/morroniside-a-secoiridoid-glycoside-from-cornus-officinalis-attenuates-neuropathic-pain-by-activation-of-spinal-glucagon-like-peptide-1-receptors
#1
Meng Xu, Hai-Yun Wu, Hao Liu, Nian Gong, Yi-Rui Wang, Yong-Xiang Wang
BACKGROUND AND PURPOSE: Iridoid glycosides with intact double bond scaffold of cyclopentapyran were reversible and orthosteric agonists of glucagon-like peptide-1 (GLP-1) receptors and possess antinociception and neuroprotection. Morroniside, derived from the medicinal herb Cornus officinalis, is an atypical secoiridoid replaced by a six-membered cyclic inner ether fragment. This study investigated whether morroniside was an orthosteric GLP-1 receptor agonist and had antihypersensitivity activities in neuropathy...
January 18, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28097492/activation-of-trpm2-and-trpv1-channels-in-dorsal-root-ganglion-by-nadph-oxidase-and-protein-kinase-c-molecular-pathways-a-patch-clamp-study
#2
Mustafa Nazıroğlu
Despite considerable research, the mechanisms of neuropathic pain induced by excessive oxidative stress production and overload calcium ion (Ca(2+)) entry in dorsal root ganglion (DRG) remain substantially unidentified. The transient receptor potential melastatin 2 (TRPM2) and vanilloid 1 (TRPV1) channels are activated with different stimuli including oxidative stress. TRPM2 and TRPV1 have been shown to be involved in induction of neuropathic pain. However, the activation mechanisms of TRPM2 and TRPV1 via NADPH oxidase and protein kinase C (PKC) pathways are poorly understood...
January 17, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28092651/long-lasting-antinociceptive-effects-of-green-light-in-acute-and-chronic-pain-in-rats
#3
Mohab M Ibrahim, Amol Patwardhan, Kerry B Gilbraith, Aubin Moutal, Xiaofang Yang, Lindsey A Chew, Tally Largent-Milnes, T Philip Malan, Todd W Vanderah, Frank Porreca, Rajesh Khanna
Treatments for chronic pain are inadequate, and new options are needed. Nonpharmaceutical approaches are especially attractive with many potential advantages including safety. Light therapy has been suggested to be beneficial in certain medical conditions such as depression, but this approach remains to be explored for modulation of pain. We investigated the effects of light-emitting diodes (LEDs), in the visible spectrum, on acute sensory thresholds in naive rats as well as in experimental neuropathic pain...
February 2017: Pain
https://www.readbyqxmd.com/read/28089079/repeated-subarachnoid-administrations-of-autologous-mesenchymal-stromal-cells-supported-in-autologous-plasma-improve-quality-of-life-in-patients-suffering-incomplete-spinal-cord-injury
#4
Jesús Vaquero, Mercedes Zurita, Miguel A Rico, Celia Bonilla, Concepción Aguayo, Cecilia Fernández, Noemí Tapiador, Marta Sevilla, Carlos Morejón, Jesús Montilla, Francisco Martínez, Esperanza Marín, Salvador Bustamante, David Vázquez, Joaquín Carballido, Alicia Rodríguez, Paula Martínez, Coral García, Mercedes Ovejero, Marta V Fernández
BACKGROUND AIMS: Cell therapy with mesenchymal stromal cells (MSCs) offers new hope for patients suffering from spinal cord injury (SCI). METHODS: Ten patients with established incomplete SCI received four subarachnoid administrations of 30 × 10(6) autologous bone marrow MSCs, supported in autologous plasma, at months 1, 4, 7 and 10 of the study, and were followed until the month 12. Urodynamic, neurophysiological and neuroimaging studies were performed at months 6 and 12, and compared with basal studies...
January 6, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28088231/efficacy-of-gabapentin-for-prevention-of-postherpetic-neuralgia-study-protocol-for-a-randomized-controlled-clinical-trial
#5
Manuel Rullán, Oana Bulilete, Alfonso Leiva, Aina Soler, Antonia Roca, María José González-Bals, Patricia Lorente, Joan Llobera
BACKGROUND: Postherpetic neuralgia (PHN) is a chronic neuropathic pain that results from alterations of the peripheral nervous system in areas affected by the herpes zoster virus. The symptoms include pain, paresthesia, dysesthesia, hyperalgesia, and allodynia. Despite the availability of pharmacological treatments to control these symptoms, no treatments are available to control the underlying pathophysiology responsible for this disabling condition. METHODS/DESIGN: Patients with herpes zoster who are at least 50 years old and have a pain score of 4 or higher on a visual analogue scale (VAS) will be recruited...
January 14, 2017: Trials
https://www.readbyqxmd.com/read/28075022/the-mechanistic-basis-for-photobiomodulation-therapy-of-neuropathic-pain-by-near-infrared-laser-light
#6
Vanessa Milanesi Holanda, Maria Cristina Chavantes, Xingjia Wu, Juanita J Anders
BACKGROUND AND OBJECTIVE: Various irradiances have been reported to be beneficial for the treatment of neuropathic pain with near infrared light. However, the mechanistic basis for the beneficial outcomes may vary based on the level of irradiance or fluence rate used. Using in vivo and in vitro experimental models, this study determined the mechanistic basis of photobiomodulation therapy (PBMT) for the treatment of neuropathic pain using a high irradiance. STUDY DESIGN/MATERIALS AND METHODS: In vitro experiments: Cultured, rat DRG were randomly assigned to control or laser treatment (LT) groups with different irradiation times (2, 5, 30, 60, or 120 seconds)...
January 11, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28074831/rgs9-2-modulates-responses-to-oxycodone-in-pain-free-and-chronic-pain-states
#7
Sevasti Gaspari, Valeria Cogliani, Lefteris Manouras, Ethan M Anderson, Vasiliki Mitsi, Kleopatra Avrampou, Fiona B Carr, Venetia Zachariou
Regulator of G protein signalling 9-2 (RGS9-2) is a striatal enriched signal transduction modulator, known to play a critical role in the development of addiction-related behaviours following exposure to psychostimulants or opioids. RGS9-2 controls the function of several GPCRs, including dopamine and mu opioid (MOR) receptors. We previously showed that RGS9-2 complexes negatively control morphine analgesia, and promote the development of morphine tolerance. In contrast, RGS9-2 positively modulates the actions of other opioid analgesics, such as fentanyl and methadone...
January 11, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28073787/col6a5-variants-in-familial-neuropathic-chronic-itch
#8
Filippo Martinelli-Boneschi, Marina Colombi, Marco Castori, Grazia Devigili, Roberto Eleopra, Rayaz A Malik, Marco Ritelli, Nicoletta Zoppi, Chiara Dordoni, Melissa Sorosina, Paola Grammatico, Hassan Fadavi, Monique M Gerrits, Rowida Almomani, Catharina G Faber, Ingemar S J Merkies, Daniela Toniolo, Massimiliano Cocca, Claudio Doglioni, Stephen G Waxman, Sulayman D Dib-Hajj, Michela M Taiana, Jenny Sassone, Raffaella Lombardi, Daniele Cazzato, Andrea Zauli, Silvia Santoro, Margherita Marchi, Giuseppe Lauria
Itch is thought to represent the peculiar response to stimuli conveyed by somatosensory pathways shared with pain through the activation of specific neurons and receptors. It can occur in association with dermatological, systemic and neurological diseases, or be the side effect of certain drugs. However, some patients suffer from chronic idiopathic itch that is frequently ascribed to psychological distress and for which no biomarker is available to date. We investigated three multigenerational families, one of which diagnosed with joint hypermobility syndrome/Ehlers-Danlos syndrome hypermobility type (JHS/EDS-HT), characterized by idiopathic chronic itch with predominantly proximal distribution...
January 9, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28072811/evaluation-of-the-ototoxicity-potential-of-once-daily-single-entity-hydrocodone-in-patients-with-chronic-pain-results-of-two-phase-3-clinical-studies
#9
Kathleen Campbell, J Walter Kutz, Angela Shoup, Warren Wen, Shau Yu Lynch, Ellie He, Steven R Ripa
BACKGROUND: Use/misuse of the opioid combination hydrocodone-acetaminophen has been associated with permanent hearing loss. Although reports have been rare, this potential effect can have significant detrimental effect on patients' overall quality of life. To date, the ototoxic effect of hydrocodone alone has not been systematically investigated. OBJECTIVE: In this report, we aimed to evaluate the potential ototoxicity of a novel, single-entity, once-daily, extended-release hydrocodone tablet (Hysingla® ER; HYD)...
January 2017: Pain Physician
https://www.readbyqxmd.com/read/28072810/high-frequency-spinal-cord-stimulation-for-complex-regional-pain-syndrome-a-case-report
#10
Joseph T Crapanzano, Lisa M Harrison-Bernard, Mark R Jones, Alan D Kaye, Erich O Richter, Mordeci N Potash
Complex regional pain syndrome (CRPS) is a chronic, debilitating, neuropathic pain condition which is often misdiagnosed, difficult to manage, and lacks proven methods for remission. Most available methods provide some relief to a small percentage of patients. Recent FDA approval and superiority of the Nevro Senza 10-kHz high frequency (HF10) spinal cord stimulation (SCS) therapy over traditional low-frequency spinal cord stimulation for treatment of chronic back and leg pain may provide a new interventional therapeutic option for patients suffering from CRPS...
January 2017: Pain Physician
https://www.readbyqxmd.com/read/28072808/use-of-high-concentration-capsaicin-patch-for-the-treatment-of-pelvic-pain-observational-study-of-60-inpatients
#11
Amelie Levesque, Thibault Riant, Jean-Jacques Labat, Stephane Ploteau
BACKGROUND: Chronic pelvic, perineal and gluteal neuralgia is often experienced in a similar way to neuropathic pain, in the territories of four nerves: ilio-inguinal, pudendal, inferior cluneal and posterior gluteal nerves. These pains are often refractory to medical treatment based on the use of systemic molecules with disabling adverse effects and surgical procedure may be necessary. OBJECTIVE: The objective of this study was to evaluate the efficacy and safety of treatment with a high-concentration capsaicin patch in these indications...
January 2017: Pain Physician
https://www.readbyqxmd.com/read/28072797/effect-of-concomitant-pain-medications-on-response-to-pregabalin-in-patients-with-postherpetic-neuralgia-or-spinal-cord-injury-related-neuropathic-pain
#12
Stephan A Schug, Bruce Parsons, Mary Almas, Ed Whalen
BACKGROUND: Patients with neuropathic pain (NeP) often receive combination therapy with multiple agents in the hopes of improving both pain and any comorbidities that may be present. While pregabalin is often recommended as a first-line treatment of NeP, few studies have examined the effects of concomitant medications on the efficacy of pregabalin. OBJECTIVE: To examine the effects of concomitant medications on the efficacy and safety of pregabalin for the treatment of NeP...
January 2017: Pain Physician
https://www.readbyqxmd.com/read/28072749/ultrasound-guided-pulsed-radiofrequency-treatment-of-the-cervical-sympathetic-chain-for-complex-regional-pain-syndrome-a-retrospective-observational-study
#13
Eung Don Kim, Woo Joo Yoo, Yoo Na Kim, Hue Jung Park
The stellate ganglion is a common target to manage neuropathic pain in the upper extremities. However, the effect duration of a single stellate ganglion block is often temporary. To overcome the short-term effects of a single sympathetic block, pulsed radiofrequency (PRF) can be applied. The aim of the present study was to investigate the efficacy of PRF on the cervical sympathetic chain under ultrasound guidance for complex regional pain syndrome (CRPS).Twelve CRPS patients who underwent PRF on the cervical sympathetic chain were enrolled in this retrospective analysis...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28072605/oxytocin-alleviates-orofacial-mechanical-hypersensitivity-associated-with-infraorbital-nerve-injury-via-vasopressin-1a-receptors-of-the-rat-trigeminal-ganglia
#14
Asako Kubo, Masamichi Shinoda, Ayano Katagiri, Mamoru Takeda, Tatsuro Suzuki, Junichi Asaka, David C Yeomans, Koichi Iwata
Oxytocin (OXT) is a neuropeptide hormone synthesized and secreted by hypothalamic neurons, and has been reported to play a significant role in pain modulation. However, the mechanisms underlying OXT's antinociceptive effect on neuropathic pain are not fully understood. In the present study, we examined the peripheral effect of OXT on mechanical hypersensitivity induced by partial ligation of the infraorbital nerve (PNL) in rats. Mechanical hypersensitivity in the whisker pad skin following PNL was attenuated by the direct administration of OXT into the trigeminal ganglion (TG)...
January 7, 2017: Pain
https://www.readbyqxmd.com/read/28065184/long-term-outcomes-in-the-management-of-painful-diabetic-neuropathy
#15
Lauren M Mai, A John Clark, Allan S Gordon, Mary E Lynch, Pat K Morley-Forster, Howard Nathan, Catherine Smyth, Larry W Stitt, Cory Toth, Mark A Ware, Dwight E Moulin
BACKGROUND: Painful diabetic neuropathy (PDN) is a frequent complication of diabetes mellitus. Current treatment recommendations are based on short-term trials, generally of ≤3 months' duration. Limited data are available on the long-term outcomes of this chronic disease. The objective of this study was to determine the long-term clinical effectiveness of the management of chronic PDN at tertiary pain centres. METHODS: From a prospective observational cohort study of patients with chronic neuropathic non-cancer pain recruited from seven Canadian tertiary pain centres, 60 patients diagnosed with PDN were identified for analysis...
January 9, 2017: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/28062253/spinal-neuropeptide-expression-and-neuropathic-behavior-in-the-acute-and-chronic-phases-after-spinal-cord-injury-effects-of-progesterone-administration
#16
María F Coronel, Marcelo J Villar, Pablo R Brumovsky, Susana L González
Patients with spinal cord injury (SCI) develop chronic pain that severely compromises their quality of life. We have previously reported that progesterone (PG), a neuroprotective steroid, could offer a promising therapeutic strategy for neuropathic pain. In the present study, we explored temporal changes in the expression of the neuropeptides galanin and tyrosine (NPY) and their receptors (GalR1 and GalR2; Y1R and Y2R, respectively) in the injured spinal cord and evaluated the impact of PG administration on both neuropeptide systems and neuropathic behavior...
January 3, 2017: Peptides
https://www.readbyqxmd.com/read/28058534/hyperbaric-oxygen-attenuates-neuropathic-pain-and-reverses-inflammatory-signaling-likely-via-the-kindlin-1-wnt-10a-signaling-pathway-in-the-chronic-pain-injury-model-in-rats
#17
Baisong Zhao, Yongying Pan, Haiping Xu, Xingrong Song
BACKGROUND: Hyperbaric oxygen (HBO) therapy is proven to attenuate neuropathic pain in rodents. The goal of the present study was to determine the potential involvement of the Kindlin-1/Wnt-10a signaling pathway during astrocyte activation and inflammation in a rodent model of neuropathic pain. METHODS: Rats were assigned into sham operation, chronic constriction injury (CCI), and CCI + HBO treatment groups. Neuropathic pain developed in rats following CCI of the sciatic nerve...
December 2017: Journal of Headache and Pain
https://www.readbyqxmd.com/read/28058139/the-effect-of-anakinra-on-paclitaxel-induced-peripheral-neuropathic-pain-in-rats
#18
Ufuk Kuyrukluyıldız, İlke Küpeli, Zehra Bedir, Özgür Özmen, Didem Onk, Bahadır Süleyman, Renad Mammadov, Halis Süleyman
OBJECTIVE: Paclitaxel is used in the treatment of cancer, and it may cause interleukin-1 beta (IL-1β)-related peripheral neuropathic pain. While our primary aim was to investigate the analgesic efficacy of an IL-1β antagonist, a secondary outcome was to assess whether a correlation exists between analgesic effects and antioxidant activity. METHODS: A total of 24 albino Wistar male rats were divided into the following groups: paclitaxel-control, paclitaxel+50 mg kg(-1) anakinra, paclitaxel+100 mg kg(-1) anakinra and healthy group (HG)...
December 2016: Turkish Journal of Anaesthesiology and Reanimation
https://www.readbyqxmd.com/read/28057537/the-chloride-co-transporters-nkcc1-and-kcc2-in-experimental-autoimmune-encephalomyelitis-eae
#19
Muhammad Saad Yousuf, Kasia Zubkow, Gustavo Tenorio, Bradley Kerr
Patients with multiple sclerosis (MS) often complain of neuropathic pain. According to the Gate Control Theory of Pain, spinal networks of GABAergic inhibitory interneurons are important in modulating nociceptive inputs from the periphery. Na+-K+-2Cl- co-transporter 1 (NKCC1) and K+-Cl- co-transporter 2 (KCC2) generally dictate the tone of GABA/glycine inhibition by regulating intracellular chloride concentrations. In this study, we investigated the role of NKCC1 and KCC2 in neuropathic pain observed in the animal model, experimental autoimmune encephalomyelitis (EAE), a commonly used model to study the pathophysiology of MS...
January 3, 2017: Neuroscience
https://www.readbyqxmd.com/read/28057459/parabrachial-pituitary-adenylate-cyclase-activating-polypeptide-activation-of-amygdala-endosomal-extracellular-signal-regulated-kinase-signaling-regulates-the-emotional-component-of-pain
#20
Galen Missig, Linda Mei, Margaret A Vizzard, Karen M Braas, James A Waschek, Kerry J Ressler, Sayamwong E Hammack, Victor May
BACKGROUND: Chronic pain and stress-related psychopathologies, such as depression and anxiety-associated abnormalities, are mutually reinforcing; however, the neuronal circuits and mechanisms that underlie this reinforcement are still not well understood. Pituitary adenylate cyclase activating polypeptide (PACAP; Adcyap1) and its cognate PAC1 receptor (Adcyap1r1) are expressed in peripheral nociceptive pathways, participate in anxiety-related responses and have been have been linked to posttraumatic stress disorder and other mental health afflictions...
August 29, 2016: Biological Psychiatry
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