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Pns and pain

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https://www.readbyqxmd.com/read/29913949/long-term-pain-neuroinflammation-and-glial-activation
#1
Elisabeth Hansson
Nociceptive and neuropathic pain signals are known to result from noxious stimuli, which are converted into electrical impulses within tissue nociceptors. There is a complex equilibrium of pain-signalling and pain-relieving pathways connecting PNS and CNS. Drugs against long-term pain are today directed against increased neuronal excitability, mostly with less success. An injury often starts with acute physiological pain, which becomes inflammatory, nociceptive, or neuropathic, and may be transferred into long-term pain...
December 29, 2017: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29905630/ultrasound-guided-percutaneous-peripheral-nerve-stimulation-neuromodulation-of-the-sciatic-nerve-for-postoperative-analgesia-following-ambulatory-foot-surgery-a-proof-of-concept-study
#2
Brian M Ilfeld, Rodney A Gabriel, Engy T Said, Amanda M Monahan, Jacklynn F Sztain, Wendy B Abramson, Bahareh Khatibi, John J Finneran, Pia T Jaeger, Alexandra K Schwartz, Sonya S Ahmed
BACKGROUND AND OBJECTIVES: Percutaneous peripheral nerve stimulation (PNS) is an analgesic modality involving the insertion of a lead through an introducing needle followed by the delivery of electric current. This modality has been reported to treat chronic pain as well as postoperative pain the day following knee surgery. However, it remains unknown if this analgesic technique may be used in ambulatory subjects following foot procedures beginning within the recovery room immediately following surgery, and with only short series of patients reported to date, the only available data are derived from strictly observational studies...
June 13, 2018: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/29865017/aquaporin-4-expression-on-trigeminal-satellite-glial-cells-under-normal-and-inflammatory-conditions
#3
D Riccio, G Magni, S Ceruti, L Arendt-Nielsen, P Gazerani
Aims Limited information is currently available for the expression and role of Aquaporin 4 (AQP4) (AQ4) in the peripheral nervous system (PNS). It has been demonstrated that AQP4 is expressed in sensory ganglia. Immunohistochemistry has revealed that satellite glial cells (SGCs) surrounding the cell bodies of the primary afferent sensory neurons in these sensory ganglia exclusively express AQP4 at a considerably lower level than what is seen in astrocytes. The pathophysiological relevance of AQP4 in peripheral nociception; however, remains unclear...
December 29, 2017: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29718880/various-clinical-features-of-patients-with-anti-hu-associated-paraneoplastic-neurological-syndromes-an-observational-study
#4
Jia Li, Weihong Lin
To describe and analyze the clinical features and prognosis of patients with anti-Hu associated paraneoplastic neurological syndromes (PNS).The symptoms, MRI findings, cerebrospinal fluid (CSF) changes, electroencephalogram (EEG) characteristics and prognoses of 9 well-diagnosed anti-Hu associated PNS patients were analyzed.The study enrolled 6 female and 3 male patients. Three patients presented with vertigo and 6 patients exhibited a depressed mood, numbness of the lower limbs, generalized pains, seizures, mental disturbances, and a temporary unilateral hand tremor on initial presentation...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29703151/clinical-features-and-risk-factors-of-neurological-involvement-in-sj%C3%A3-gren-s-syndrome
#5
Wenjing Ye, Siyan Chen, Xinshi Huang, Wei Qin, Ting Zhang, Xiaofang Zhu, Xiaochun Zhu, Chongxiang Lin, Xiaobing Wang
BACKGROUND: To investigated distinct manifestations of Sjögren's syndrome (SS) patients with neurological complications and the potential risk factors associated with neurological complications in SS, and to produce a disease evaluation and neurological involvement prediction for SS. METHODS: 566 patients who fulfilled the 2002 classification criteria for SS from the Rheumatology Department of the First Affiliated Hospital of Wenzhou Medical University were included in the cross-sectional study...
April 27, 2018: BMC Neuroscience
https://www.readbyqxmd.com/read/29606887/electrical-peripheral-nerve-stimulation-relieves-bone-cancer-pain-by-inducing-arc-protein-expression-in-the-spinal-cord-dorsal-horn
#6
Ke-Fu Sun, Wan-Wen Feng, Yue-Peng Liu, Yan-Bin Dong, Li Gao, Hui-Lin Yang
Objective: The analgesic effect on chronic pain of peripheral nerve stimulation (PNS) has been proven, but its underlying mechanism remains unknown. Therefore, this study aimed to assess the analgesic effect of PNS on bone cancer pain in a rat model and to explore the underlying mechanism. Materials and methods: PNS on sciatic nerves with bipolar electrode was performed in both naïve and bone cancer pain model rats. Then, the protein levels of activity-regulated cytoskeleton-associated protein (Arc), α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid-type glutamate receptor 1 (GluA1), and phosphate N -methyl-d-aspartic acid-type glutamate receptor subunit 2B (pGluNR2B) in spinal cord were evaluated by immunohistochemistry and Western blotting...
2018: Journal of Pain Research
https://www.readbyqxmd.com/read/29570943/the-relationship-between-heart-rate-variability-psychological-flexibility-and-pain-in-neurofibromatosis-type-1
#7
Taryn M Allen, Kari L Struemph, Mary Anne Toledo-Tamula, Pamela L Wolters, Andrea Baldwin, Brigitte Widemann, Staci Martin
Individuals with neurofibromatosis type 1 (NF1) and plexiform neurofibromas (PNs) can experience chronic pain. Previous research has examined the relationship between heart rate variability (HRV) and persistent pain. HRV is an index of autonomic nervous system functioning, and reflects the variability in time elapsed between heartbeats. Patients with chronic pain tend to exhibit lower HRV, which has been associated with poor adaptability, or psychological flexibility, to stress. The aim of the current study was to examine relationships between HRV, psychological flexibility, and pain in a sample of adolescents and young adults (AYAs) with NF1 and PNs...
March 23, 2018: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/29520865/schwann-cells-regulate-sensory-neuron-gene-expression-before-and-after-peripheral-nerve-injury
#8
Gunnar Poplawski, Tetsuhiro Ishikawa, Coralie Brifault, Corinne Lee-Kubli, Robert Regestam, Kenneth W Henry, Yasuhiro Shiga, HyoJun Kwon, Seiji Ohtori, Steven L Gonias, Wendy M Campana
Sensory neurons in the PNS demonstrate substantial capacity for regeneration following injury. Recent studies have identified changes in the transcriptome of sensory neurons, which are instrumental for axon regeneration. The role of Schwann cells (SCs) in mediating these changes remains undefined. We tested the hypothesis that SCs regulate expression of genes in sensory neurons before and after PNS injury by comparing mice in which LDL Receptor-related Protein-1 (LRP1) is deleted in SCs (scLRP1-/- mice) with wild-type (scLRP1+/+ ) littermates...
March 9, 2018: Glia
https://www.readbyqxmd.com/read/29486771/mitochondrial-damage-and-plugging-of-transport-selectively-in-myelinated-small-diameter-axons-are-major-early-events-in-peripheral-neuroinflammation
#9
Marija Sajic, Keila Kazue Ida, Ryan Canning, Norman A Gregson, Michael R Duchen, Kenneth J Smith
BACKGROUND: Small-diameter, myelinated axons are selectively susceptible to dysfunction in several inflammatory PNS and CNS diseases, resulting in pain and degeneration, but the mechanism is not known. METHODS: We used in vivo confocal microscopy to compare the effects of inflammation in experimental autoimmune neuritis (EAN), a model of Guillain-Barré syndrome (GBS), on mitochondrial function and transport in large- and small-diameter axons. We have compared mitochondrial function and transport in vivo in (i) healthy axons, (ii) axons affected by experimental autoimmune neuritis, and (iii) axons in which mitochondria were focally damaged by laser induced photo-toxicity...
February 27, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29470828/enhancement-of-dissolution-and-skin-permeability-of-pentazocine-by-proniosomes-and-niosomal-gel
#10
Asadullah Madni, Muhammad Abdur Rahim, Muhammad Ahmad Mahmood, Abdul Jabar, Mubashar Rehman, Hassan Shah, Arshad Khan, Nayab Tahir, Aamna Shah
Proniosomes (PN) are the dry water-soluble carrier systems that may enhance the oral bioavailability, stability, and topical permeability of therapeutic agents. The low solubility and low oral bioavailability due to extensive first pass metabolism make Pentazocine as an ideal candidate for oral and topical sustained release delivery. The present study was aimed to formulate the PNs by quick slurry method that are converted to niosomes (liquid dispersion) by hydration, and subsequently formulated to semisolid niosomal gel...
May 2018: AAPS PharmSciTech
https://www.readbyqxmd.com/read/29428928/new-concepts-of-chronic-pain-and-the-potential-role-of-complementary-therapies
#11
Ken Wojcikowski, Vanessa J Vigar, Christopher J Oliver
Context • The mechanisms of chronic pain involve complex neuroplastic changes at all 3 orders of neurons involved in the transmission of pain as well as changes in the descending inhibitory pathway. Although traditional pharmaceutical therapies have some efficacy, substantial scope exists for a new model of individualized therapy, tailored to the specific response of each patient. Because changes occur at all levels of the pain pathway, successful treatment may require a combination of therapies with different mechanisms of action...
March 10, 2018: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/29344846/evaluation-of-psychosocial-and-biological-parameters-in-women-seeking-for-a-caesarean-section-and-women-who-are-aiming-for-vaginal-delivery-a-cross-sectional-study
#12
Benjamin Tuschy, Sebastian Berlit, Paul Stützer, Stefanie Lis, Christian Schmahl, Ulf Baumgärtner, Marc Sütterlin
PURPOSE: To investigate psychosocial and biological parameters that may influence decision-making concerning the mode of delivery in women with caesarean section on maternal request (CSMR). METHODS: Two hundred and two women were enrolled prospectively. The study sample (n = 93) consisted of women who aimed for CSMR, the control sample were women who seeked for vaginal delivery (n = 109). Parturients of both samples were enrolled during the pre-birth counselling at the delivery room at the University Medical Centre Mannheim, University Heidelberg, Germany...
January 17, 2018: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/29238215/electrical-stimulation-of-the-posterior-tibial-nerve-reduces-neuropathic-pain-in-patients-with-polyneuropathy
#13
Ron Dabby, Menachem Sadeh, Ilan Goldberg, Vitaly Finkelshtein
Peripheral neuropathic pain (PNP) is caused by neuronal damage to the peripheral nervous system and usually affects the distal extremities. This open-label study examined the effect of short-term peripheral nerve stimulation (PNS) on individuals with PNP due to polyneuropathy. A total of 12 patients (mean age, 63.0 ± 10.0 years, 41.7% male) with daily bilateral PNP for at least 6 months (mean duration, 7.4 ± 7.8 years) received a total of six direct electrical stimulation therapies to the posterior tibial nerve at 3-4-day intervals...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/29213230/pannexin-1-modulates-axonal-growth-in-mouse-peripheral-nerves
#14
Steven M Horton, Carlos Luna Lopez, Elisabeth Blevins, Holly Howarth, Jake Weisberg, Valery I Shestopalov, Helen P Makarenkova, Sameer B Shah
The pannexin family of channels consists of three members-pannexin-1 (Panx1), pannexin-2 (Panx2), and pannexin-3 (Panx3) that enable the exchange of metabolites and signaling molecules between intracellular and extracellular compartments. Pannexin-mediated release of intracellular ATP into the extracellular space has been tied to a number of cellular activities, primarily through the activity of type P2 purinergic receptors. Previous work indicates that the opening of Panx1 channels and activation of purinergic receptors by extracellular ATP may cause inflammation and apoptosis...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29164745/fully-implantable-peripheral-nerve-stimulation-for-hemiplegic-shoulder-pain-a-multi-site-case-series-with-two-year-follow-up
#15
REVIEW
Richard D Wilson, Maria E Bennett, Vu Q C Nguyen, William C Bock, Michael W O'Dell, Thomas K Watanabe, Russell H Amundson, Harry A Hoyen, John Chae
OBJECTIVE: To explore the feasibility and safety of a single-lead, fully implantable peripheral nerve stimulation system for the treatment of chronic shoulder pain in stroke survivors. PARTICIPANTS: Participants with moderate to severe shoulder pain not responsive to conservative therapies for six months. METHODS: During the trial phase, which included a blinded sham introductory period, a percutaneous single-lead peripheral nerve stimulation system was implanted to stimulate the axillary nerve of the affected shoulder...
April 2018: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/29082637/peripheral-nerve-stimulation-for-painful-mononeuropathy-secondary-to-leprosy-a-12-month-follow-up-study
#16
REVIEW
Tiago da Silva Freitas, Erich Talamoni Fonoff, Oswaldo Ribeiro Marquez Neto, Iruena Moraes Kessler, Laura Mendes Barros, Ronan Wilk Guimaraes, Monalisa Ferreira Azevedo
OBJECTIVE: Leprosy affects approximately 10-15 million patients worldwide and remains a relevant public health issue. Chronic pain secondary to leprosy is a primary cause of morbidity, and its treatment remains a challenge. We evaluated the feasibility and safety of peripheral nerve stimulation (PNS) for painful mononeuropathy secondary to leprosy that is refractory to pharmacological therapy and surgical intervention (decompression). METHODS: Between 2011 and 2013 twenty-three patients with painful mononeuropathy secondary to leprosy were recruited to this prospective case series...
April 2018: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/29057550/in-vitro-magnetic-resonance-imaging-evaluation-of-fragmented-open-coil-percutaneous-peripheral-nerve-stimulation-leads
#17
REVIEW
Frank G Shellock, Armaan Zare, Brian M Ilfeld, John Chae, Robert B Strother
OBJECTIVE: Percutaneous peripheral nerve stimulation (PNS) is an FDA-cleared pain treatment. Occasionally, fragments of the lead (MicroLead, SPR Therapeutics, LLC, Cleveland, OH, USA) may be retained following lead removal. Since the lead is metallic, there are associated magnetic resonance imaging (MRI) risks. Therefore, the objective of this investigation was to evaluate MRI-related issues (i.e., magnetic field interactions, heating, and artifacts) for various lead fragments. METHODS: Testing was conducted using standardized techniques on lead fragments of different lengths (i...
April 2018: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/29030173/a-novel-miniature-wireless-neurostimulator-in-the-management-of-chronic-craniofacial-pain-preliminary-results-from-a-prospective-pilot-study
#18
Richard L Weiner, Carlos Montes Garcia, Niek Vanquathem
OBJECTIVE: To report a novel wireless neuromodulation system for treatment of refractory craniofacial pain. BACKGROUND: Previous studies utilizing peripheral nerve stimulation (PNS) of the occipital and trigeminal nerves reported positive outcomes for alleviating neuropathic pain localized to the craniofacial and occipital areas. However several technological limitations and cosmetic concerns inhibited a more widespread acceptance and use of neuromodulation. Also, a relatively high incidence of adverse events like electrode erosions, dislocation, wire fracture and/or infection at the surgical site mandates a change in our approach to neuromodulation technology and implant techniques in the craniofacial region...
October 10, 2017: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29016994/neuromodulation-in-postherpetic-neuralgia-case-reports-and-review-of-the-literature
#19
Svetlana Kurklinsky, Scott C Palmer, Mack J Arroliga, Salim M Ghazi
Objective: Postherpetic neuralgia (PHN) is common in the United States. Current treatment options for PHN are fairly limited. Spinal cord stimulation (SCS) and peripheral nerve stimulation (PNS) are considered mostly experimental and still rarely performed in patients with PHN. Design: Two case reports and a review of the literature. Setting: Tertiary academic medical center. Methods: 1) Pubmed, Ovid, and EBMR databases were searched for all reports that had the following key words: postherpetic neuralgia, spinal cord stimulation, and peripheral nerve stimulation...
July 17, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28975064/neuroleukemiosis-two-case-reports
#20
Vlad Voin, Shehzad Khalid, Sebastian Shrager, R Shane Tubbs, Robert Greiner, Krishnamoorthy Thamburaj, Elias Rizk
Extramedullary tumors composed of myeloblasts or monoblasts can present in various locations. Patients with a history of acute myeloid leukemia (AML) can present with neuropathic pain and no evidence of relapse of their leukemia. Neuroleukemiosis is a form of extramedullary tumor present in the peripheral nervous systems (PNS) of leukemia patients. We report two AML patients who were in remission and later presented with neurological symptoms due to neuroleukemiosis with negative bone marrow biopsies.
July 31, 2017: Curēus
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