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Sciatic neuropathy

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https://www.readbyqxmd.com/read/29196315/phosphorylated-ccaat-enhancer-binding-protein-%C3%AE-contributes-to-rat-hiv-related-neuropathic-pain-in-vitro-and-in-vivo-studies
#1
Hyun Yi, Shue Liu, Yuta Kashiwagi, Daigo Ikegami, Wan Huang, Hirotsugu Kanda, Takafumi Iida, Ching-Hang Liu, Keiya Takahashi, David A Lubarsky, Shuanglin Hao
Chronic pain is increasingly recognized as an important comorbidity of HIV-infected patients, however, the exact molecular mechanisms of HIV-related pain are still elusive. CCAAT/enhancer binding proteins (C/EBPs) are expressed in various tissues, including the central nervous system. C/EBPβ, one of C/EBPs is involved in the progression of HIV/AIDS, but the exact role of C/EBPβ and its upstream factors are not clear in HIV pain state. Here, we used a neuropathic pain model of perineural HIV envelope glycoprotein gp120 application onto the rat sciatic nerve to test the role of phosphorylated C/EBPβ (pC/EBPβ) and its upstream pathway in the spinal cord dorsal horn (SCDH)...
December 1, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29191802/peripheral-neuropathy-induced-by-microtubule-targeted-chemotherapies-insights-into-acute-injury-and-long-term-recovery
#2
Krystyna M Wozniak, James J Vornov, Ying Wu, Ying Liu, Valentina A Carozzi, Virginia Rodriquez-Menendez, Elisa Ballarini, Paola Alberti, Eleonora Pozzi, Sara Semperboni, Brett M Cook, Bruce A Littlefield, Kenichi Nomoto, Krista Condon, Sean Eckley, Christopher DesJardins, Leslie Wilson, Mary Ann Jordan, Stuart C Feinstein, Guido Cavaletti, Michael Polydefkis, Barbara S Slusher
Chemotherapy-induced peripheral neuropathy (CIPN) is a major cause of disability in cancer survivors. CIPN investigations in preclinical model systems have focused on either behaviors or acute changes in nerve conduction velocity (NCV) and amplitude, but greater understanding of the underlying nature of axonal injury and its long-term processes is needed as cancer patients live longer. In this study, we used multiple independent endpoints to systematically characterize CIPN recovery in mice exposed to the anti-tubulin cancer drugs eribulin (ERIB), ixabepilone (IXA), paclitaxel (PACLI) or vinorelbine (VINO) at maximal tolerated doses...
November 30, 2017: Cancer Research
https://www.readbyqxmd.com/read/29191577/electrical-stimulation-of-the-insular-cortex-as-a-novel-target-for-the-relief-of-refractory-pain-an-experimental-approach-in-rodents
#3
Luiz Fabio Dimov, Elaine Flamia Toniolo, Heloísa Alonso-Matielo, Daniel Ciampi de Andrade, Luis Garcia-Larrea, Gerson Ballester, Manoel Jacobsen Teixeira, Camila Squarzoni Dale
Cortical electrical stimulation (CES) has shown to be an effective therapeutic alternative for neuropathic pain refractory to pharmacological treatment. The primary motor cortex(M1) was the main cortical target used in the vast majority of both invasive and non-invasive studies. Despite positive results M1-based approaches still fail to relieve pain in a significant proportion of individuals. It has been advocated that the direct stimulation of cortical areas directly implicated in the central integration of pain could increase the efficacy of analgesic brain stimulation...
November 27, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/29188473/effect-of-simvastatin-on-sensorial-motor-and-morphological-parameters-in-sciatic-nerve-crush-induced-neuropathic-pain-in-rats
#4
Claudia Rita Corso, Daniel Fernandes Martins, Stephanie Carvalho Borges, Olair Carlos Beltrame, José Ederaldo Queiroz Telles, Nilza Cristina Buttow, Maria Fernanda de Paula Werner
The present study compares the effects of a low and high doses of simvastatin in a model of peripheral neuropathy by evaluating sensorial, motor, and morphological parameters. First, male Wistar rats were orally treated with vehicle (saline, 1 mL/kg), simvastatin (2 and 80 mg/kg) or morphine (2 mg/kg, s.c.), 1 h before 2.5% formalin injection. Neuropathic pain was induced by crushing the sciatic nerve, and mechanical and cold allodynia, nerve function, histology, MPO and NAG concentrations, as well as mevalonate induced-nociception were evaluated...
November 29, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/29171411/beta-secretase-activity-in-peripheral-nerve-regeneration
#5
REVIEW
Carolyn Tallon, Mohamed H Farah
While the peripheral nervous system has the capacity to regenerate following a nerve injury, it is often at a slow rate and results in unsatisfactory recovery, leaving patients with reduced function. Many regeneration associated genes have been identified over the years, which may shed some insight into how we can manipulate this intrinsic regenerative ability to enhance repair following peripheral nerve injuries. Our lab has identified the membrane bound protease beta-site amyloid precursor protein-cleaving enzyme 1 (BACE1), or beta secretase, as a potential negative regulator of peripheral nerve regeneration...
October 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/29157803/iridoid-glycosides-fraction-from-picrorhiza-kurroa-attenuates-cyclophosphamide-induced-renal-toxicity-and-peripheral-neuropathy-via-ppar-%C3%AE-mediated-inhibition-of-inflammation-and-apoptosis
#6
Supriya Sharma, Pallavi Sharma, Pankaj Kulurkar, Damanpreet Singh, Dinesh Kumar, Vikram Patial
BACKGROUND: Picrorhiza kurroa Royle (Scrophulariaceae) is an important medicinal herb being widely used in variety of ailments. PURPOSE: The present study was envisaged to evaluate the effects of iridoid glycosides enriched fraction (IGs) from Picrorhiza kurroa rhizome against cyclophosphamide (CP) -induced renal toxicity and peripheral neuropathy. METHODS: Mice in different groups were pretreated with 25, 50 and 100 mg/kg; p.o. doses of IGs for 21 days, followed by cyclophosphamide intoxication for consecutive two days...
December 1, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/29154836/a-new-promising-simultaneous-approach-for-attenuating-type-ii-diabetes-mellitus-induced-neuropathic-pain-in-rats-inos-inhibition-and-neuroregeneration
#7
Abhilasha Ahlawat, Saurabh Sharma
In view of the pathologic basis for the treatment of diabetic neuropathy, it is important to enhance nerve regeneration as well as prevent nerve degeneration. So, in the present study, we have investigated the effect of S-Methylisothiourea Sulfate (selective iNOS inhibitor) and Citicoline, alone and in combination, on Type II diabetes mellitus induced neuropathic pain in wistar rats. Type II diabetes was induced by providing high fat diet and low dose of Streptozotocin for 35 days in rats. Type II diabetes mellitus was assessed in terms of increased glucose, triglycerides, cholesterol, LDL levels, glucose tolerance and decrease in HDL levels...
November 14, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29143802/the-inhibitory-effects-of-cobalt-protoporphyrin-ix-and-cannabinoid-2-receptor-agonists-in-type-2-diabetic-mice
#8
Christina McDonnell, Sergi Leánez, Olga Pol
The activation of the transcription factor Nrf2 inhibits neuropathy and modulates the activity of delta-opioid receptors (DOR) in type 2 diabetic mice but the impact of Nrf2/HO-1 pathway on the antinociceptive actions of cannabinoid 2 receptors (CB2R) has not been assessed. Using male mice BKS.Cg-m+/+Leprdb/J (db/db) we investigated if treatment with cobalt protoporphyrin IX (CoPP), an HO-1 inductor, inhibited mechanical allodynia, hyperglycemia and obesity associated to type 2 diabetes. The antinociceptive effects of JWH-015 and JWH-133 (CB2R agonists) administered with and without CoPP or sulforaphane (SFN), a Nrf2 transcription factor activator, have been also evaluated...
October 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29122628/a-novel-curcumin-derivative-for-the-treatment-of-diabetic-neuropathy
#9
Daniel J Daugherty, Alexandra Marquez, Nigel A Calcutt, David Schubert
Neuropathy is a common complication of long-term diabetes. Proposed mechanisms of neuronal damage caused by diabetes that are downstream of hyperglycemia and/or loss of insulin signaling include ischemic hypoxia, inflammation and loss of neurotrophic support. The curcumin derivative J147 is a potent neurogenic and neuroprotective drug candidate initially developed for the treatment of neurodegenerative conditions associated with aging that impacts many pathways implicated in the pathogenesis of diabetic neuropathy...
November 6, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29119607/impaired-peripheral-nerve-regeneration-in-type-2-diabetic-mouse-model
#10
Pham Minh Vuong, H Tu Nguyen, Tayo Katano, Shinji Matsumura, Akira Saito, Akihiro Yamada, Hidemasa Furue, Seiji Ito
Peripheral neuropathy is one of the most common and serious complications of type-2 diabetes. Diabetic neuropathy is characterized by a distal symmetrical sensorimotor polyneuropathy, and its incidence increases in patients 40 years of age or older. In spite of extensive research over decades, there are few effective treatments for diabetic neuropathy besides glucose control and improved lifestyle. The earliest changes in diabetic neuropathy occur in sensory nerve fibers, with initial degeneration and regeneration resulting in pain...
November 9, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29112513/endoscopic-sciatic-nerve-decompression-after-fracture-or-reconstructive-surgery-of-the-acetabulum-in-comparison-with-endoscopic-treatments-in-idiopathic-deep-gluteal-syndrome
#11
Myung-Sik Park, Seong-Yep Jeong, Sun-Jung Yoon
OBJECTIVE: The purpose of this study was to assess the endoscopic findings of the sciatic nerve and clinical outcomes of major traumatic sciatic nerve neuropathies after fracture or reconstructive surgery of the acetabulum with idiopathic deep gluteal syndrome (DGS) groups. DESIGN: Retrospective review of patient reports. SETTING: Level I trauma center of a tertiary university hospital. PARTICIPANTS: The study included 70 patients who consecutively underwent endoscopic sciatic nerve decompression...
October 27, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29105386/the-effect-of-ethanolic-extract-of-lippia-citriodora-on-rats-with-chronic-constriction-injury-of-neuropathic-pain
#12
Bahareh Amin, Reyhaneh Noorani, Bibi Marjan Razavi, Hossein Hosseinzadeh
OBJECTIVES: We examined the protective effects of ethanolic extract of Lippia citriodora (L. citriodora) on rats subjected to chronic constriction injury (CCI) of sciatic nerve and possible mechanisms of actions. MATERIALS AND METHODS: In this experimental study, the extract was administered 50, 100 and 200 mg/kg, Intraperitoneally (I.P) from the surgery time for 14 consecutive days. The changes in the spinal cord levels of apoptotic factors, microglia and astroglia markers during the time course of study were assessed by western blotting on days 3, 7 and 14 post-CCI...
January 2018: Cell Journal
https://www.readbyqxmd.com/read/29094786/intraneural-perineuriomas-diagnostic-value-of-magnetic-resonance-neurography
#13
L León Cejas, D Binaghi, M Socolovsky, A Dubrovsky, L Pirra, C Marchesoni, A Pardal, S Monges, G Peretti, A Taratuto, F Lubinieki, R Reisin
Intraneural perineurioma is an under-recognized hypertrophic peripheral nerve tumor. It affects young patients involving frequently the sciatic nerve and its branches and presents with a progressive, painless and predominantly motor deficit. Magnetic resonance neurography is a useful tool to localize the lesion, evaluate its extension, and discriminate between different etiologies. We reviewed the clinical records of 11 patients with pathologically confirm intraneural perineurioma. Eight patients were males with mean age 19 years...
November 2, 2017: Journal of the Peripheral Nervous System: JPNS
https://www.readbyqxmd.com/read/29094308/ameliorative-potential-of-rutin-in-combination-with-nimesulide-in-stz-model-of-diabetic-neuropathy-targeting-nrf2-ho-1-nf-kb-and-cox-signalling-pathway
#14
Ruchika Mittal, Anil Kumar, Dhirendra Pratap Singh, Mahendra Bishnoi, Tapas Chandra Nag
Emerging role of Nrf-2/HO-1 in pathogenesis of diabetic neuropathy has been suggested. Diabetic neuropathy is one of the most common complications of diabetes and more than 50% patients of diabetes develop diabetic neuropathy. Rutin has been well documented to show protective effect in various complications, e.g., diabetic neuropathy. However, its mechanistic insight is still not completely understood. The present study has been designed to explore the protective effect of rutin and its interaction with COX-2 inhibitor, nimesulide in diabetic neuropathy...
November 1, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/29081097/-effect-of-nerve-growth-factor-on-chronic-peripheral-neuropathy-in-rats-induced-by-1-bromopropane
#15
J Y Wu, J B Zhang, W J Chen, D Y Sun
Objective: To observe the effect of nerve growth factor (NGF) and Mecobalamin on chronic peripheral neuropathy in rats induced by 1-bromopropane. Methods: 36 male SD rats were exposed to 1-bromopropane vapor at concentrations of 4 000 mg/m(3), 6 hours per day, 5 days per week for 12 weeks. The rats were randomed divided into 4 groups, and treated by Mecobalamin for 300 μg/kg qd, NGF for 40 μg/kg qd, Mecobalamin+NGF with the dose as mentioned above, respecively. The control group were fed in normal condition...
July 20, 2017: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/29076578/impairment-of-protein-degradation-and-proteasome-function-in-hereditary-neuropathies
#16
Jordan J S VerPlank, Sudarsanareddy Lokireddy, M Laura Feltri, Alfred L Goldberg, Lawrence Wrabetz
In several neurodegenerative diseases in which misfolded proteins accumulate there is impairment of the ubiquitin proteasome system (UPS). We tested if a similar disruption of proteostasis occurs in hereditary peripheral neuropathies. In sciatic nerves from mouse models of two human neuropathies, Myelin Protein Zero mutation (S63del) and increased copy number (P0 overexpression), polyubiquitinated proteins accumulated, and the overall rates of protein degradation were decreased. 26S proteasomes affinity-purified from sciatic nerves of S63del mice were defective in degradation of peptides and a ubiquitinated protein, unlike proteasomes from P0 overexpression, which appeared normal...
October 27, 2017: Glia
https://www.readbyqxmd.com/read/29063256/sciatic-neurosteatosis-relationship-with-age-gender-obesity-and-height
#17
Shayna Ratner, Raamis Khwaja, Lihua Zhang, Yin Xi, Riham Dessouky, Craig Rubin, Avneesh Chhabra
AIM: To evaluate inter-reader performance for cross-sectional area and fat quantification of bilateral sciatic nerves on MRI and assess correlations with anthropometrics. METHODS: In this IRB-approved, HIPPA-compliant study, three readers performed a cross-sectional analysis of 3T lumbosacral plexus MRIs over an 18-month period. Image slices were evaluated at two levels (A and B). The sciatic nerve was outlined using a free hand region of interest tool on PACS. Proton-density fat fraction (FF) and cross-sectional areas were recorded...
October 23, 2017: European Radiology
https://www.readbyqxmd.com/read/29055716/attenuation-of-mechanical-pain-hypersensitivity-by-treatment-with-peptide5-a-connexin-43-mimetic-peptide-involves-inhibition-of-nlrp3-inflammasome-in-nerve-injured-mice
#18
Ryan S Tonkin, Callum Bowles, Chamini J Perera, Brooke A Keating, Preet G S Makker, Samuel S Duffy, Justin G Lees, Collin Tran, Anthony S Don, Thomas Fath, Lu Liu, Simon J O'Carroll, Louise F B Nicholson, Colin R Green, Catherine Gorrie, Gila Moalem-Taylor
Connexin43 (Cx43) hemichannels in spinal cord astrocytes are implicated in the maintenance of neuropathic pain following peripheral nerve injury. Peptide5 is a Cx43 mimetic peptide that blocks hemichannels. In this study, we investigated the effects of spinal delivery of Peptide5 on mechanical pain hypersensitivity in two mouse models of neuropathic pain, peripheral nerve injury and chemotherapy-induced peripheral neuropathy (CIPN). We demonstrated that 10days following a chronic constriction injury (CCI) of the sciatic nerve, Cx43 expression, co-localised predominantly with astrocytes, was increased in the ipsilateral L3-L5 lumbar spinal cord...
October 18, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/29032027/peripheral-neuropathy-and-hindlimb-paralysis-in-a-mouse-model-of-adipocyte-specific-knockout-of-lkb1
#19
Yan Xiong, Jessica C Page, Naagarajan Narayanan, Chao Wang, Zhihao Jia, Feng Yue, Xine Shi, Wen Jin, Keping Hu, Meng Deng, Riyi Shi, Tizhong Shan, Gongshe Yang, Shihuan Kuang
Brown adipose tissues (BAT) burn lipids to generate heat through uncoupled respiration, thus representing a powerful target to counteract lipid accumulation and obesity. The tumor suppressor liver kinase b1 (Lkb1) is a key regulator of cellular energy metabolism; and adipocyte-specific knockout of Lkb1 (Ad-Lkb1 KO) leads to the expansion of BAT, improvements in systemic metabolism and resistance to obesity in young mice. Here we report the unexpected finding that the Ad-Lkb1 KO mice develop hindlimb paralysis at mid-age...
October 2017: EBioMedicine
https://www.readbyqxmd.com/read/29022773/native-paraneurial-tissue-and-paraneurial-adhesions-alter-nerve-strain-distribution-in-rat-sciatic-nerves
#20
Ian M Foran, Vincent Hussey, Rushil A Patel, Jaemyoung Sung, Sameer B Shah
Paraneurial adhesions have been implicated in the pathological progression of entrapment neuropathies. Surgical decompression of adhesions is often performed, with the intent of restoring nerve kinematics. The normal counterpart of adhesions, native paraneurium, is also thought to influence nerve deformation and mobility. However, influences of native or abnormal paraneurial structures on nerve kinematics have not been investigated. We measured regional strains in rat sciatic nerves before and immediately after decompression of native paraneurial tissue, and before and after decompression of abnormal paraneurial adhesions, which formed within 6 weeks of the initial decompression...
January 1, 2017: Journal of Hand Surgery, European Volume
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