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Sciatic neuropathy

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https://www.readbyqxmd.com/read/29032027/peripheral-neuropathy-and-hindlimb-paralysis-in-a-mouse-model-of-adipocyte-specific-knockout-of-lkb1
#1
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...
September 21, 2017: EBioMedicine
https://www.readbyqxmd.com/read/29022773/native-paraneurial-tissue-and-paraneurial-adhesions-alter-nerve-strain-distribution-in-rat-sciatic-nerves
#2
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
https://www.readbyqxmd.com/read/28970182/pathophysiological-profiles-of-sdt-fatty-rats-a-potential-new-diabetic-peripheral-neuropathy-model
#3
Tatsuya Maekawa, Hironobu Tadaki, Tomohiko Sasase, Yu Motohashi, Katsuhiro Miyajima, Takeshi Ohta, Shinichi Kume
INTRODUCTION: To establish an animal model for diabetic peripheral neuropathy (DPN) at an earlier stage, we performed functional and pathophysiological evaluations in Spontaneously Diabetic Torii (SDT) fatty rats before 16weeks of age. METHODS: Male SDT fatty rats were treated with vehicle or phlorizin (100 to 150mg/kg/day) from 5 to 16weeks. Sprague-Dawley (SD) rats were used as age-matched controls. Body weights and biochemical parameters were measured over time...
September 29, 2017: Journal of Pharmacological and Toxicological Methods
https://www.readbyqxmd.com/read/28969623/protective-effects-of-methanolic-extract-of-juglans-regia-l-leaf-on-streptozotocin-induced-diabetic-peripheral-neuropathy-in-rats
#4
Davood Nasiry, Ali Reza Khalatbary, Hassan Ahmadvand, Fereshteh Talebpour Amiri, Esmaeil Akbari
BACKGROUND: Oxidative stress has a pivotal role in the pathogenesis and development of diabetic peripheral neuropathy (DPN), the most common and debilitating complications of diabetes mellitus. There is accumulating evidence that Juglans regia L. (GRL) leaf extract, a rich source of phenolic components, has hypoglycemic and antioxidative properties. This study aimed to determine the protective effects of Juglans regia L. leaf extract against streptozotocin-induced diabetic neuropathy in rat...
October 2, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28969059/association-of-myelinated-primary-afferents-impairment-with-mechanical-allodynia-in-diabetic-peripheral-neuropathy-an-experimental-study-in-rats
#5
Chenlong Liao, Min Yang, Wenxiang Zhong, Pengfei Liu, Wenchuan Zhang
To investigate the mechanisms underlying the efficacy of surgical treatment for painful diabetic peripheral neuropathy. Rats were initially divided into 3 groups (I, control rats, II, streptozotocin-induced diabetic rats, III, streptozotocin-induced diabetic rats with latex tube encircling the sciatic nerve without compression). When mechanical allodynia (MA) became stable in the third week, one third of group III rats were sacrificed and the remainder were further divided into subgroups depending on whether the latex tube was removed...
September 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28946529/management-of-refractory-sciatic-neuropathic-pain-using-ultrasound-guided-pulsed-radiofrequency
#6
Dong Gyu Lee, Yun Woo Cho, Kil-Ho Cho, Min Cheol Chang
BACKGROUND AND OBJECTIVE: Nowadays, pulsed radiofrequency (PRF) is being used to control several types of musculoskeletal pain. Herein, we report a successful application of ultrasound (US)-guided PRF for a patient with refractory sciatic neuropathic pain. CASE REPORT: We applied US-guided PRF to a 50-year-old man, suffering from refractory neuropathic pain on the left foot following sciatic neuropathy for a period of approximately 6 months. We performed PRF on the level of piriformis muscle because the lesion of the sciatic nerve was presented digitally from the level of piriformis muscle on the magnetic resonance images...
September 22, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/28934536/glomus-tumor-of-the-sciatic-nerve-an-extraspinal-cause-of-sciatica
#7
Basilia Onyinyechukwu Nwankwo, Robert M Henshaw, Dhruv Kumar
Glomus tumors are small, benign tumors that arise from glomus bodies, structures found normally within the dermis that assist in temperature regulation via their vasoconstrictive response to sympathetic stimuli. Glomus tumors are found typically in the hand and are classically a cause of focal pain and temperature sensitivity. They often present as a small blue lesion seen under the nail bed of a finger or a toe and cause point tenderness. Glomus tumors of peripheral nerves are exceedingly rare and can lead to disability akin to compressive neuropathy when present...
September 21, 2017: Orthopedics
https://www.readbyqxmd.com/read/28927011/assessing-autophagy-in-sciatic-nerves-of-a-rat-model-that-develops-inflammatory-autoimmune-peripheral-neuropathies
#8
REVIEW
Susana Brun, Nicolas Schall, Hélène Jeltsch-David, Jérôme de Sèze, Sylviane Muller
The rat sciatic nerve has attracted widespread attention as an excellent model system for studying autophagy alterations in peripheral neuropathies. In our laboratory, we have developed an original rat model, which we used currently in routine novel drug screening and to evaluate treatment strategies for chronic inflammatory demyelinating polyneuropathy (CIDP) and other closely related diseases. Lewis rats injected with the S-palmitoylated P0(180-199) peptide develop a chronic, sometimes relapsing-remitting type of disease...
September 18, 2017: Cells
https://www.readbyqxmd.com/read/28916318/matrix-metalloproteinases-2-and-9-in-campylobacter-jejuni-induced-paralytic-neuropathy-resembling-guillain-barr%C3%A3-syndrome-in-chickens
#9
Kishan Kumar Nyati, Kashi Nath Prasad, Vinita Agrawal, Nuzhat Husain
Inflammation in Guillain-Barré syndrome (GBS) is manifested by changes in matrix metalloproteinase (MMP) and pro-inflammatory cytokine expression. We investigated the expression of MMP-2, -9 and TNF-α and correlated it with pathological changes in sciatic nerve tissue from Campylobacter jejuni-induced chicken model for GBS. Campylobacter jejuni and placebo were fed to chickens and assessed for disease symptoms. Sciatic nerves were examined by histopathology and immunohistochemistry. Expressions of MMPs and TNF-α, were determined by real-time PCR, and activities of MMPs by zymography...
October 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28912683/nano-scale-biophysical-and-structural-investigations-on-intact-and-neuropathic-nerve-fibers-by-simultaneous-combination-of-atomic-force-and-confocal-microscopy
#10
Gonzalo Rosso, Ivan Liashkovich, Peter Young, Victor Shahin
The links between neuropathies of the peripheral nervous system (PNS), including Charcot-Marie-Tooth1A and hereditary neuropathy with liability to pressure palsies, and impaired biomechanical and structural integrity of PNS nerves remain poorly understood despite the medical urgency. Here, we present a protocol describing simultaneous structural and biomechanical integrity investigations on isolated nerve fibers, the building blocks of nerves. Nerve fibers are prepared from nerves harvested from wild-type and exemplary PNS neuropathy mouse models...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28912156/neutrophils-are-critical-for-myelin-removal-in-a-peripheral-nerve-injury-model-of-wallerian-degeneration
#11
Jane A Lindborg, Matthias Mack, Richard E Zigmond
Wallerian degeneration (WD) is considered an essential preparatory stage to the process of axonal regeneration. In the peripheral nervous system, infiltrating monocyte-derived macrophages that utilize the chemokine receptor CCR2 to gain entry to injured tissues from the bloodstream, are purportedly necessary for efficient WD. However, our lab has previously reported that myelin clearance in the injured sciatic nerve proceeds unhindered in the Ccr2(-/-) mouse model. Here, we extensively characterize WD in male Ccr2(-/-) mice and identify a compensatory mechanism of WD that is facilitated primarily by neutrophils...
September 14, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28900459/protective-effects-of-bogijetong-decoction-and-its-selected-formula-on-neuropathic-insults-in-streptozotocin-induced-diabetic-animals
#12
Ki-Joong Kim, Uk Namgung, Chung Sik Cho
Bogijetong decoction (BGJTD) is a mixture of herbal formulation which is used in the traditional Korean medicine for the treatment of neuropathic pain caused by diabetes. Here, we investigated the regulatory effects of BGJTD and its reconstituted decoction subgroups on the neuropathic responses in streptozotocin- (STZ-) induced diabetic animals. Be decoction (BeD) was formulated by selecting individual herbal components that induced neurite outgrowth most efficiently in each subgroup. BeD induced the neurite outgrowth in DRG neurons most efficiently among decoction subgroups and downregulated the production of TNF-α from the sciatic nerves in STZ-diabetic animals...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28899883/microrna-146a-mimics-reduce-the-peripheral-neuropathy-in-type-ii-diabetic-mice
#13
Xian Shuang Liu, Baoyan Fan, Alexandra Szalad, Longfei Jia, Lei Wang, Xinli Wang, Wanlong Pan, Li Zhang, Ruilan Zhang, Jiani Hu, Xiao Ming Zhang, Michael Chopp, Zheng Gang Zhang
MicroRNA-146a (miR-146a) regulates multiple immune diseases. However, the role of miR-146a in diabetic peripheral neuropathy (DPN) has not been investigated. We found that mice (db/db) with type II diabetes exhibited substantial down-regulation of miR-146a in sciatic nerve tissue. Systemic administration of miR-146a mimics to diabetic mice elevated miR-146a levels in plasma and sciatic nerve tissue and substantially increased motor and sensory nerve conduction velocities by 29% and 11%, respectively, and regional blood flow by 50% in sciatic nerve tissue...
September 12, 2017: Diabetes
https://www.readbyqxmd.com/read/28867384/downregulations-of-trpm8-expression-and-membrane-trafficking-in-dorsal-root-ganglion-mediate-the-attenuation-of-cold-hyperalgesia-in-cci-rats-induced-by-gfr%C3%AE-3-knockdown
#14
Lin Su, Ruichen Shu, Chengcheng Song, Yonghao Yu, Guolin Wang, Yazhuo Li, Changxiao Liu
BACKGROUND: Cold hyperalgesia is an intractable sensory abnormality commonly seen in peripheral neuropathies. Although glial cell line-derived neurotrophic factor family receptor alpha3 (GFRα3) is required for the formation of pathological cold pain has been revealed, potential transduction mechanism is poorly elucidated. We have previously demonstrated the contribution of enhanced activity of transient receptor potential melastatin 8 (TRPM8) to cold hyperalgesia in neuropathic pain using a rat model of chronic constriction injury (CCI) to the sciatic nerve...
September 1, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28837658/dorsal-root-ganglia-hypertrophy-as-in-vivo-correlate-of-oxaliplatin-induced-polyneuropathy
#15
Leonidas Apostolidis, Daniel Schwarz, Annie Xia, Markus Weiler, Andreas Heckel, Tim Godel, Sabine Heiland, Heinz-Peter Schlemmer, Dirk Jäger, Martin Bendszus, Philipp Bäumer
PURPOSE: To investigate in vivo morphological and functional correlates of oxaliplatin-induced peripheral neuropathy (OXA-PNP) by magnetic resonance neurography (MRN). METHODS: Twenty patients (7 female, 13 male, 58.9±10.0 years) with mild to moderate OXA-PNP and 20 matched controls (8 female, 12 male, 55.7±15.6 years) were prospectively enrolled. All patients underwent a detailed neurophysiological examination prior to neuroimaging. A standardized imaging protocol at 3...
2017: PloS One
https://www.readbyqxmd.com/read/28835396/human-dorsal-root-ganglion-in-vivo-morphometry-and-perfusion-in-fabry-painful-neuropathy
#16
Tim Godel, Philipp Bäumer, Mirko Pham, Anja Köhn, Nicole Muschol, Moritz Kronlage, Jennifer Kollmer, Sabine Heiland, Martin Bendszus, Victor-Felix Mautner
OBJECTIVE: To evaluate functional and morphometric magnetic resonance neurography of the dorsal root ganglion and peripheral nerve segments in patients with Fabry painful neuropathy. METHODS: In this prospective study, the lumbosacral dorsal root ganglia and proximal peripheral nerve segments of the lower extremity were examined in 11 male patients with Fabry disease by a standardized 3T magnetic resonance neurography protocol. Volumes of L3 to S2 dorsal root ganglia, perfusion parameters of L5-S1 dorsal root ganglia and the spinal nerve L5, and the cross-sectional area of the proximal sciatic nerve were compared to healthy controls...
September 19, 2017: Neurology
https://www.readbyqxmd.com/read/28833461/melatonin-limits-paclitaxel-induced-mitochondrial-dysfunction-in-vitro-and-protects-against-paclitaxel-induced-neuropathic-pain-in-the-rat
#17
Helen F Galley, Barry McCormick, Kirsten L Wilson, Damon A Lowes, Lesley Colvin, Carole Torsney
Chemotherapy-induced neuropathic pain is a debilitating and common side effect of cancer treatment. Mitochondrial dysfunction associated with oxidative stress in peripheral nerves has been implicated in the underlying mechanism. We investigated the potential of melatonin, a potent antioxidant that preferentially acts within mitochondria, to reduce mitochondrial damage and neuropathic pain resulting from the chemotherapeutic drug paclitaxel. In vitro, paclitaxel caused a 50% reduction in mitochondrial membrane potential and metabolic rate, independent of concentration (20-100 μmol/L)...
August 22, 2017: Journal of Pineal Research
https://www.readbyqxmd.com/read/28815909/proximal-neuropathy-and-associated-skeletal-muscle-changes-resembling-denervation-atrophy-in-hind-limbs-of-chronic-hypoglycaemic-rats
#18
Vivi F H Jensen, Anne-Marie Molck, Henrik Soeborg, Jette Nowak, Melissa Chapman, Jens Lykkesfeldt, Ingrid B Bogh
Peripheral neuropathy is one of the most common complications of diabetic hyperglycaemia. Insulin-induced hypoglycaemia (IIH) might potentially exacerbate or contribute to neuropathy as hypoglycaemia also causes peripheral neuropathy. In rats, IIH induces neuropathy associated with skeletal muscle changes. Aims of the present study were to investigate the progression and sequence of histopathologic changes caused by chronic IIH in rat peripheral nerves and skeletal muscle, and whether such changes were reversible...
August 16, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28815646/a-novel-endpoint-for-the-assessment-of-chemotherapy-induced-peripheral-neuropathy-in-rodents-biomechanical-properties-of-peripheral-nerve
#19
Chang-Ning Liu, Edwin Berryman, David Zakur, Ahmed M Shoieb, Ingrid D Pardo, Magalie Boucher, Chris J Somps, Chedo M Bagi, Jon C Cook
Chemotherapy-induced peripheral neuropathy (CiPN) is a frequent adverse effect in patients and a leading safety consideration in oncology drug development. Although behavioral assessment and microscopic examination of the nerves and dorsal root ganglia can be incorporated into toxicity studies to assess CiPN risk, more sensitive and less labor-intensive endpoints are often lacking. In this study, rats and mice administered vincristine (75 μg kg(-1)  day(-1) , i.p., for 10 days in rats and 100 μg kg(-1)  day(-1) , i...
August 16, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28815599/the-reduction-of-intraepidermal-p2x3-nerve-fiber-density-correlates-with-behavioral-hyperalgesia-in-a-rat-model-of-nerve-injury-induced-pain
#20
Malik Bechakra, Barthold N Schüttenhelm, Tiziana Pederzani, Pieter A van Doorn, Chris I de Zeeuw, Joost L M Jongen
Skin biopsies from patients with neuropathic pain often show changes in epidermal innervation, although it remains to be elucidated to what extent such changes can be linked to a particular subgroup of nerve fibers and how these changes are correlated with pain intensity. Here, we investigated to what extent behavioral signs of hyperalgesia are correlated with immunohistochemical changes of peptidergic and non-peptidergic epidermal nerve fibers in a rat model of nerve injury-induced pain. Rats subjected to unilateral partial ligation of the sciatic nerve developed significant mechanical and thermal hyperalgesia as tested by the withdrawal responses of the ipsilateral footpad to von Frey hairs and hotplate stimulation...
August 17, 2017: Journal of Comparative Neurology
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