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chronic persistent nerve pain

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https://www.readbyqxmd.com/read/28921418/coping-with-phantom-limb-pain
#1
Damien P Kuffler
Phantom limb pain is a chronic neuropathic pain that develops in 45-85% of patients who undergo major amputations of the upper and lower extremities and appears predominantly during two time frames following an amputation: the first month and later about 1 year. Although in most patients the frequency and intensity of pain diminish over time, severe pain persists in about 5-10%. It has been proposed that factors in both the peripheral and central nervous systems play major roles in triggering the development and maintenance of pain associated with extremity amputations...
September 18, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28877966/t-cell-mediation-of-pregnancy-analgesia-affecting-chronic-pain-in-mice
#2
Sarah F Rosen, Boram Ham, Shannon Drouin, Nadia Boachie, Anne-Julie Chabot-Dore, Jean-Sebastien Austin, Luda Diatchenko, Jeffrey S Mogil
It has been consistently reported that many female chronic pain sufferers have an attenuation of symptoms during pregnancy. Rats display increased pain tolerance during pregnancy, due to an increase in opioid receptors in the spinal cord. These past studies did not consider the role of non-neuronal cells, now appreciated to play an important role in chronic pain processing. Using an inflammatory (complete Freund's adjuvant) or neuropathic (spared nerve injury) model of persistent pain, we observe that young adult female mice in early pregnancy switch from a micgrolia-independent to a microglia-dependent pain hypersensitivity mechanism...
September 6, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28860068/protraction-of-neuropathic-pain-by-morphine-is-mediated-by-spinal-damage-associated-molecular-patterns-damps-in-male-rats
#3
Peter M Grace, Keith A Strand, Erika L Galer, Kenner C Rice, Steven F Maier, Linda R Watkins
We have recently reported that a short course of morphine, starting 10days after sciatic chronic constriction injury (CCI), prolonged the duration of mechanical allodynia for months after morphine ceased. Maintenance of this morphine-induced persistent sensitization was dependent on spinal NOD-like receptor protein 3 (NLRP3) inflammasomes-protein complexes that proteolytically activate interleukin-1β (IL-1β) via caspase-1. However, it is still unclear how NLRP3 inflammasome signaling is maintained long after morphine is cleared...
August 30, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28859662/chronic-pain-in-gaucher-disease-skeletal-or-neuropathic-origin
#4
Grazia Devigili, Michele De Filippo, Giovanni Ciana, Andrea Dardis, Christian Lettieri, Sara Rinaldo, Daniela Macor, Alessandro Moro, Roberto Eleopra, Bruno Bembi
BACKGOUND: Pain is one of the most disabling symptoms of Gaucher disease. It is referred by the majority of Gaucher patients and often persists despite long-term enzyme replacement treatment. It has been mainly considered as nociceptive pain secondary to skeletal involvement but it is described even in the absence of bone disease without a clear explanation. In the last years an increasing number of reports have described the presence of neurological manifestation in Gaucher type 1 patients, including subclinical large fibre neuropathy...
August 31, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/28835277/prophylactic-inhibition-of-neutrophil-elastase-prevents-the-development-of-chronic-neuropathic-pain-in-osteoarthritic-mice
#5
Milind M Muley, Eugene Krustev, Allison R Reid, Jason J McDougall
BACKGROUND: A subset of osteoarthritis (OA) patients experience joint pain with neuropathic characteristics. Mediators such as neutrophil elastase, a serine proteinase, may be released during acute OA inflammatory flares. We have previously shown that local administration of neutrophil elastase causes joint inflammation and pain via activation of proteinase-activated receptor-2 (PAR2). The aim of this study was to examine the contribution of endogenous neutrophil elastase and PAR2 to the development of joint inflammation, pain, and neuropathy associated with monoiodoacetate (MIA)-induced experimental OA...
August 23, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28830762/contribution-of-amygdala-crf-neurons-to-chronic-pain
#6
Matthew Andreoli, Tanvi Marketkar, Eugene Dimitrov
We investigated the role of amygdala corticotropin-releasing factor (CRF) neurons in the perturbations of descending pain inhibition caused by neuropathic pain. Forced swim increased the tail-flick response latency in uninjured mice, a phenomenon known as stress-induced analgesia (SIA) but did not change the tail-flick response latency in mice with neuropathic pain caused by sciatic nerve constriction. Neuropathic pain also increased the expression of CRF in the central amygdala (CeAmy) and ΔFosB in the dorsal horn of the spinal cord...
August 19, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28822987/effects-of-a-water-extract-of-lepidium-meyenii-root-in-different-models-of-persistent-pain-in-rats
#7
Barbara Tenci, Lorenzo Di Cesare Mannelli, Mario Maresca, Laura Micheli, Giuseppe Pieraccini, Nadia Mulinacci, Carla Ghelardini
Lepidium meyenii (Walp.), commonly called maca, is an Andean crop belonging to the Brassicaceae family. Maca hypocotils are habitually consumed as customary food as well as traditional remedies for pathological conditions such as infertility. Moreover, the characterization of maca extracts revealed the presence of compounds that are able to modulate the nervous system. Aimed to evaluate the efficacy of L. meyenii in persistent pain, the present study analyzed the effects of a commercial root extract from maca in different animal models reproducing the most common causes of chronic painful pathologies...
August 21, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28770976/non-steroidal-anti-inflammatory-drugs-nsaids-for-chronic-non-cancer-pain-in-children-and-adolescents
#8
REVIEW
Christopher Eccleston, Tess E Cooper, Emma Fisher, Brian Anderson, Nick Mr Wilkinson
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 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. While in the past pain was largely dismissed and was frequently left untreated, views on children's pain have changed over time, and relief of pain is now seen as important...
August 2, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28770975/paracetamol-acetaminophen-for-chronic-non-cancer-pain-in-children-and-adolescents
#9
REVIEW
Tess E Cooper, Emma Fisher, Brian Anderson, Nick Mr Wilkinson, David G Williams, Christopher Eccleston
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 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. While in the past, pain was largely dismissed and was frequently left untreated, views on children's pain have changed over time, and relief of pain is now seen as important...
August 2, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28763697/chronic-inguinal-pain-after-laparoscopic-intraperitoneal-onlay-mesh-ipom-repair-for-inguinal-hernia-treated-successfully-with-laparoscopic-selective-neurectomy-a-case-report
#10
Keita Hanada, Masato Narita, Kentaro Goto, Haruka Okada, Keisuke Okura, Shunpei Jikihara, Hiroki Nakanishi, Masashi Saji, Ryo Matsusue, Hiroaki Hata, Takashi Yamaguchi, Tetsushi Otani, Iwao Ikai
INTRODUCTION: Laparoscopic intraperitoneal onlay mesh (IPOM) repair is occasionally used for inguinal hernia repair. Here, we report a case of chronic neuropathic pain after laparoscopic IPOM repair for inguinal hernia, which was treated successfully with laparoscopic selective neurectomy. PRESENTATION OF CASE: A 59-year-old man with bilateral inguinal hernia underwent laparoscopic repair. Transabdominal preperitoneal repair was performed on the left side, whereas IPOM repair was performed on the right side due to a peritoneal defect...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28752263/photobiomodulation-therapy-by-nir-laser-in-persistent-pain-an-analytical-study-in-the-rat
#11
Laura Micheli, Lorenzo Di Cesare Mannelli, Elena Lucarini, Francesca Cialdai, Leonardo Vignali, Carla Ghelardini, Monica Monici
Over the past three decades, physicians have used laser sources for the management of different pain conditions obtaining controversial results that call for further investigations. In order to evaluate the pain relieving possibilities of photobiomodulation therapy (PBMT), we tested two near infrared (NIR) laser systems, with different power, against various kinds of persistent hyperalgesia animal models. In rats, articular pain was reproduced by the intra-articular injection of sodium monoiodoacetate (MIA) and complete Freund's adjuvant (CFA), while compressive neuropathy was modelled by the chronic constriction injury of the sciatic nerve (CCI)...
July 28, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28746078/spinal-microglia-are-required-for-long-term-maintenance-of-neuropathic-pain
#12
Stefania Echeverry, Xiang Qun Shi, Mu Yang, Hao Huang, YiChen Wu, Louis-Etienne Lorenzo, Jimena Perez-Sanchez, Robert P Bonin, Yves De Koninck, Ji Zhang
While spinal microglia play a role in early stages of neuropathic pain etiology, whether they are useful targets to reverse chronic pain at late stages remains unknown. Here, we show that microglia activation in the spinal cord persists for >3 months following nerve injury in rodents, beyond involvement of proinflammatory cytokine and chemokine signalling. In this chronic phase, selective depletion of spinal microglia in male rats with the targeted immunotoxin Mac1-saporin and blockade of brain-derived neurotrophic factor-TrkB signalling with intrathecal TrkB Fc chimera, but not cytokine inhibition, almost completely reversed pain hypersensitivity...
June 21, 2017: Pain
https://www.readbyqxmd.com/read/28745394/opioids-for-chronic-non-cancer-pain-in-children-and-adolescents
#13
REVIEW
Tess E Cooper, Emma Fisher, Andrew L Gray, Elliot Krane, Navil Sethna, Miranda Al van Tilburg, Boris Zernikow, Philip J Wiffen
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 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. While in the past, pain was largely dismissed and was frequently left untreated, views on children's pain have changed over time, and relief of pain is now seen as importantWe designed a suite of seven reviews on chronic non-cancer pain and cancer pain (looking at antidepressants, antiepileptic drugs, non-steroidal anti-inflammatory drugs, opioids, and paracetamol as priority areas) in order to review the evidence for children's pain utilising pharmacological interventions in children and adolescents...
July 26, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28737843/non-steroidal-anti-inflammatory-drugs-nsaids-for-cancer-related-pain-in-children-and-adolescents
#14
REVIEW
Tess E Cooper, Lauren C Heathcote, Brian Anderson, Marie-Claude Grégoire, Gustaf Ljungman, Christopher Eccleston
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 persisting pain in children 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 24, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28727705/activation-of-the-rage-stat3-pathway-in-the-dorsal-root-ganglion-contributes-to-the-persistent-pain-hypersensitivity-induced-by-lumbar-disc-herniation
#15
Xin-Sheng Zhang, Xiao Li, Hai-Jie Luo, Zhu-Xi Huang, Cui-Cui Liu, Qing Wan, Shu-Wei Xu, Shao-Ling Wu, Song-Jian Ke, Chao Ma
BACKGROUND: Clinically, chronic low back pain and sciatica associated with lumbar disc herniation (LDH) is a common musculoskeletal disorder. Due to the unawareness of detailed mechanisms, it is difficult to get an effective therapy. OBJECTIVE: The aim of the present study was to identify the role of the RAGE/STAT3 pathway in the dorsal root ganglion (DRG) on the formation and development of persistent pain hypersensitivity induced by LDH. STUDY DESIGN: Controlled animal study...
July 2017: Pain Physician
https://www.readbyqxmd.com/read/28725617/post-vasectomy-pain-syndrome-diagnosis-management-and-treatment-options
#16
REVIEW
Varsha Sinha, Ranjith Ramasamy
Vasectomy is the most effective form of sterilization for men. With approximately 500,000 vasectomies performed each year in the United States, 1-2% of these patients will experience chronic testicular pain for greater than three months after the procedure. Post-vasectomy pain syndrome (PVPS) is diagnosis of exclusion, and may be caused by direct damage to spermatic cord structures, compression of nerves in the spermatic cord via inflammation, back pressure from epididymal congestion, and perineural fibrosis...
May 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28722116/opioids-for-cancer-related-pain-in-children-and-adolescents
#17
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/28692702/impaired-insula-functional-connectivity-associated-with-persistent-pain-perception-in-patients-with-complex-regional-pain-syndrome
#18
Jae-Hun Kim, Soo-Hee Choi, Joon Hwan Jang, Do-Hyeong Lee, Kyung-Jun Lee, Won Joon Lee, Jee Youn Moon, Yong Chul Kim, Do-Hyung Kang
Given that the insula plays a contributory role in the perception of chronic pain, we examined the resting-state functional connectivity between the insular cortex and other brain regions to investigate neural underpinnings of persisting perception of background pain in patients with complex regional pain syndrome (CRPS). A total of 25 patients with CRPS and 25 matched healthy controls underwent functional magnetic resonance imaging at rest. With the anterior and posterior insular cortices as seed regions, we compared the strength of the resting-state functional connectivity between the two groups...
2017: PloS One
https://www.readbyqxmd.com/read/28677679/microrna-cluster-mir-17-92-regulates-multiple-functionally-related-voltage-gated-potassium-channels-in-chronic-neuropathic-pain
#19
Atsushi Sakai, Fumihito Saitow, Motoyo Maruyama, Noriko Miyake, Koichi Miyake, Takashi Shimada, Takashi Okada, Hidenori Suzuki
miR-17-92 is a microRNA cluster with six distinct members. Here, we show that the miR-17-92 cluster and its individual members modulate chronic neuropathic pain. All cluster members are persistently upregulated in primary sensory neurons after nerve injury. Overexpression of miR-18a, miR-19a, miR-19b and miR-92a cluster members elicits mechanical allodynia in rats, while their blockade alleviates mechanical allodynia in a rat model of neuropathic pain. Plausible targets for the miR-17-92 cluster include genes encoding numerous voltage-gated potassium channels and their modulatory subunits...
July 5, 2017: Nature Communications
https://www.readbyqxmd.com/read/28670914/high-prevalence-of-chronic-pain-with-neuropathic-characteristics-after-open-reduction-and-internal-fixation-of-ankle-fractures
#20
Nadia Rbia, Cornelis H van der Vlies, Berry I Cleffken, Ruud W Selles, Steven E R Hovius, Tim H J Nijhuis
BACKGROUND: Unstable ankle fractures require treatment with open reduction and internal fixation (ORIF). Long-term functional outcome is satisfying in most patients; however, a number of patients have persistent complaints. Superficial nerve complications following ankle surgery may be the cause of chronic pain and disability. METHODS: In this observational retrospective survey, a cohort of 527 women and men, who underwent ORIF in the period from January 2007 to January 2014, were invited to an online questionnaire...
June 1, 2017: Foot & Ankle International
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