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https://www.readbyqxmd.com/read/28108290/pmp22-mutant-allele-specific-sirna-alleviates-demyelinating-neuropathic-phenotype-in-vivo
#1
Ji-Su Lee, Eun Hyuk Chang, Ok Jae Koo, Dong Hwan Jwa, Won Min Mo, Geon Kwak, Hyo Won Moon, Hwan Tae Park, Young Bin Hong, Byung-Ok Choi
Charcot-Marie-Tooth disease (CMT) is a genetic disorder that can be caused by aberrations in >80 genes. CMT has heterogeneous modes of inheritance, including autosomal dominant, autosomal recessive, X-linked dominant, and X-linked recessive. Over 95% of cases are dominantly inherited. In this study, we investigated whether regulation of a mutant allele by an allele-specific small interfering RNA (siRNA) can alleviate the demyelinating neuropathic phenotype of CMT. We designed 19 different allele-specific siRNAs for Trembler J (Tr-J) mice harboring a naturally occurring mutation (Leu16Pro) in Pmp22...
January 17, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28107599/the-prevalence-and-impact-of-chronic-neuropathic-pain-on-daily-and-social-life-a-nationwide-study-in-a-japanese-population
#2
S Inoue, T Taguchi, T Yamashita, M Nakamura, T Ushida
BACKGROUND: This study marks the first epidemiological evaluation of the prevalence and burden of chronic neuropathic pain (NeP) in an Asian population. The objective of this nationwide cross-sectional study was to identify the characteristics of individuals with NeP, detect the NeP features that affect their quality of life (QOL), and demonstrate the negative effects of NeP on social and daily living as well as comorbidities including depression, anxiety and sleep disorders. METHODS: We mailed a cross-sectional, population-based epidemiological survey to a random nationwide sample of 10,000 Japanese adults over 20 years old...
January 20, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28107590/endocannabinoid-activation-of-cb1-receptors-contributes-to-long-lasting-reversal-of-neuropathic-pain-by-repetitive-spinal-cord-stimulation
#3
L Sun, L Tai, Q Qiu, R Mitchell, S Fleetwood-Walker, E A Joosten, C W Cheung
BACKGROUND: Spinal cord stimulation (SCS) has been shown to be effective in the management of certain neuropathic pain conditions, however, the underlying mechanisms are incompletely understood. In this study, we investigated repetitive SCS in a rodent neuropathic pain model, revealing long-lasting and incremental attenuation of hyperalgesia and a mechanism of action involving endocannabinoids. METHOD: Animals were implanted with monopolar electrodes at the time of partial sciatic nerve injury...
January 20, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28106547/phenotype-dependent-interactions-between-n-acetyl-l-aspartate-and-acetyl-coa-in-septal-sn56-cholinergic-cells-exposed-to-an-excess-of-zinc
#4
Marlena Zyśk, Hanna Bielarczyk, Sylwia Gul-Hinc, Aleksandra Dyś, Beata Gapys, Anna Ronowska, Monika Sakowicz-Burkiewicz, Andrzej Szutowicz
Pyruvate dehydrogenase reaction utilizing glucose-derived pyruvate is an almost exclusive source of acetyl-CoA in different cell mitochondrial compartments of the brain. In neuronal mitochondria, the largest fraction of acetyl-CoA is utilized for energy production and the much smaller one for N-acetyl-L-aspartate (NAA) synthesis. Cholinergic neurons, unlike others, require additional amounts of acetyl-CoA for acetylcholine synthesis. Therefore, several neurotoxic signals, which inhibit pyruvate dehydrogenase, generate deeper shortages of acetyl-CoA and greater mortality of cholinergic neurons than noncholinergic ones...
January 20, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28106318/reduced-laser-evoked-potential-habituation-detects-abnormal-central-pain-processing-in-painful-radiculopathy-patients
#5
P Hüllemann, C von der Brelie, G Manthey, J Düsterhöft, A K Helmers, M Synowitz, R Baron
BACKGROUND: Repetitive painful laser stimuli lead to physiological laser-evoked potential (LEP) habituation, measurable by a decrement of the N2/P2 amplitude. The time course of LEP-habituation is reduced in the capsaicin model for peripheral and central sensitization and in patients with migraine and fibromyalgia. In the present investigation, we aimed to assess the time course of LEP-habituation in a neuropathic pain syndrome, i.e. painful radiculopathy. METHODS: At the side of radiating pain, four blocks of 25 painful laser stimuli each were applied to the ventral thigh at the L3 dermatome in 27 patients with painful radiculopathy...
January 20, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28105902/cost-effectiveness-of-using-adjunctive-porcine-small-intestine-submucosa-tri-layer-matrix-compared-with-standard-care-in-managing-diabetic-foot-ulcers-in-the-us
#6
J F Guest, D Weidlich, H Singh, J La Fontaine, A Garrett, C J Abularrage, C R Waycaster
OBJECTIVE: To estimate the cost-effectiveness of using tri-layer porcine small intestine submucosa (SIS; Oasis Ultra) as an adjunct to standard care compared with standard care alone in managing diabetic foot ulcers (DFUs) in the US, from the perspective of Medicare. METHOD: A Markov model was constructed to simulate the management of diabetic neuropathic lower extremity ulcers over a period of one year in the US. The model was used to estimate the cost-effectiveness of initially using adjunctive SIS compared with standard care alone to treat a DFU in the US at 2016 prices...
January 2, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/28104535/immune-mediated-processes-implicated-in-chemotherapy-induced-peripheral-neuropathy
#7
REVIEW
Justin G Lees, Preet G S Makker, Ryan S Tonkin, Munawwar Abdulla, Susanna B Park, David Goldstein, Gila Moalem-Taylor
Chemotherapy-induced peripheral neuropathy (CIPN) and associated neuropathic pain are challenging complications of cancer treatment. Many of the major classes of chemotherapeutics can cause neurotoxicity and significantly modulate the immune system. There is ongoing investigation regarding whether reciprocal crosstalk between the nervous and immune systems occurs and, indeed, contributes to neuropathic pain during treatment with chemotherapeutics. An emerging concept is that neuroinflammation is one of the major mechanisms underlying CIPN...
January 16, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28103857/ameliorative-potential-of-alstonia-scholaris-linn-r-br-against-chronic-constriction-injury-induced-neuropathic-pain-in-rats
#8
Hasandeep Singh, Rohit Arora, Saroj Arora, Balbir Singh
BACKGROUND: Alstonia scholaris commonly known as 'Saptaparni' is an Indian traditional medicinal plant used in Ayurveda. It is commonly used to treat various disorders like asthma, bronchitis, diarrhea, dysentery and malaria. In folklore medicine the milky juice of the plant is applied on wounds and ulcers to treat pain, ear ache and also in rheumatic pains. AIM: The present study was designed to investigate the potential of A. scholaris R. Br. in chronic constriction injury of sciatic nerve (CCI) induced neuropathic pain in rats...
January 19, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28103821/genetic-polymorphisms-of-scn9a-are-associated-with-oxaliplatin-induced-neuropathy
#9
María Sereno, Gerardo Gutiérrez-Gutiérrez, Juan Moreno Rubio, María Apellániz-Ruiz, Lara Sánchez-Barroso, Enrique Casado, Sandra Falagan, Miriam López-Gómez, María Merino, César Gómez-Raposo, Nuria Rodriguez-Salas, Francisco Zambrana Tébar, Cristina Rodríguez-Antona
BACKGROUND: Oxaliplatin is a chemotherapy agent active against digestive tumors. Peripheral neuropathy is one of the most important dose-limiting toxicity of this drug. It occurs in around 60-80% of the patients, and 15% of them develop severe neuropathy. The pathophysiology of oxaliplatin neurotoxicity remains unclear. SCN9A is a gene codifying for a subtype sodium channel (type IX, subunit α) and mutations in this gene are involved in neuropathic perception. In this study we investigated whether SCN9A genetic variants were associated with risk of neurotoxicity in patients diagnosed of cancer on treatment with oxaliplatin...
January 19, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28101562/effects-of-wheelchair-propulsion-on-neuropathic-pain-and-resting-electroencephalography-after-spinal-cord-injury
#10
Gosuke Sato, Michihiro Osumi, Shu Morioka
OBJECTIVES: To investigate the effects of wheelchair propulsion on neuropathic pain and to examine resting electroencephalography pre- and post-wheelchair propulsion after spinal cord injury. DESIGN: Cross-sectional study. PARTICIPANTS: Eleven individuals with spinal cord injury and pain and 10 healthy controls. METHODS: Single-session 15-min wheelchair propulsion and measurement of resting electroence-phalography. Effects of wheelchair propulsion were investigated using numerical rating scale (NRS) for neuropathic pain and short-form Profile of Mood States-Brief for mood...
January 18, 2017: Journal of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28101174/protective-effects-of-resveratrol-on-autologous-nucleus-pulposus-model-of-radiculopathy
#11
Bin Lin, Hui Yu, Yongzhi He, Yang Xu, Wenbin Zhang, Chengwu Lu, Qingfang Ao
Nucleus pulposus (NP) has been suggested to trigger an autoimmune response if exposed to the immune system, which plays a key role in neuropathic pain. Therefore, appropriate suppression of inflammation is a key factor for treating the radiculopathy caused by intervertebral disk (IVD) degeneration. Resveratrol, a key component of red wine, has been suggested to exhibit anti-inflammatory properties in vitro and in vivo. However, the effects of resveratrol on NP-mediated pain in vivo have not been studied. The aim of the present study was to investigate whether resveratrol may be useful in treating NP-mediated pain in an autologous NP model of radiculopathy...
December 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28100749/promoted-interaction-of-c-ebp%C3%AE-with-demethylated-cxcr3-gene-promoter-contributes-to-neuropathic-pain-in-mice
#12
Bao-Chun Jiang, Li-Na He, Xiao-Bo Wu, Hui Shi, Wen-Wen Zhang, Zhi-Jun Zhang, De-Li Cao, Chun-Hua Li, Jun Gu, Yong-Jing Gao
: DNA methylation has been implicated in the pathogenesis of chronic pain. However, the specific genes regulated by DNA methylation under neuropathic pain condition remain largely unknown. Here we investigated how chemokine receptor CXCR3 is regulated by DNA methylation and how it contributes to neuropathic pain induced by spinal nerve ligation (SNL) in mice. SNL increased Cxcr3 mRNA and protein expression in the neurons of the spinal cord. Meanwhile, the CpG (5'-cytosine-phosphate-guanine-3') island in the Cxcr3 gene promoter region was demethylated, and the expression of DNA methyltransferase 3b (DNMT3b) was decreased...
January 18, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28100669/the-preventive-value-of-epidural-calcitonin-in-patients-with-lower-limb-amputation
#13
Ayman A Yousef, Amr M Aborahma
BACKGROUND:  Postamputation pain is highly prevalent after limb amputation with neuropathic nature; calcitonin may effectively relieve many neuropathic pain states. DESIGN:  Double-blind randomized multicenter study. SETTING:  Our study hypothesis is to evaluate the preventive value of epidural calcitonin on postoperative pain, grade of phantom pain, and the development of allodynia and hyperalgesia in patients undergoing lower limb amputation...
January 18, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28100479/evidence-of-central-sensitisation-in-those-with-dry-eye-symptoms-and-neuropathic-like-ocular-pain-complaints-incomplete-response-to-topical-anaesthesia-and-generalised-heightened-sensitivity-to-evoked-pain
#14
Ashley M Crane, William Feuer, Elizabeth R Felix, Roy C Levitt, Allison L McClellan, Konstantinos D Sarantopoulos, Anat Galor
OBJECTIVE: To evaluate how closely neuropathic-like ocular pain (NOP) symptoms align with a metric of central sensitisation (ie, the presence of persistent ocular pain after topical anaesthetic placement) in individuals with dry eye (DE) symptoms. DESIGN: Cross-sectional study of 224 individuals with DE symptoms seen in the Miami Veterans Affairs eye clinic. An evaluation was performed consisting of questionnaires regarding DE symptoms, NOP descriptors and evoked pain sensitivity testing on the forehead and forearm, followed by a comprehensive ocular surface examination including corneal mechanical sensitivity testing...
January 18, 2017: British Journal of Ophthalmology
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
#15
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
#16
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/28096400/defining-recovery-neurobiology-of-injured-spinal-cord-by-synthetic-matrix-assisted-hmsc-implantation
#17
Alexander E Ropper, Devang K Thakor, InBo Han, Dou Yu, Xiang Zeng, Jamie E Anderson, Zaid Aljuboori, Soo-Woo Kim, Hongjun Wang, Richard L Sidman, Ross D Zafonte, Yang D Teng
Mesenchymal stromal stem cells (MSCs) isolated from adult tissues offer tangible potential for regenerative medicine, given their feasibility for autologous transplantation. MSC research shows encouraging results in experimental stroke, amyotrophic lateral sclerosis, and neurotrauma models. However, further translational progress has been hampered by poor MSC graft survival, jeopardizing cellular and molecular bases for neural repair in vivo. We have devised an adult human bone marrow MSC (hMSC) delivery formula by investigating molecular events involving hMSCs incorporated in a uniquely designed poly(lactic-co-glycolic) acid scaffold, a clinically safe polymer, following inflammatory exposures in a dorsal root ganglion organotypic coculture system...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28095324/formalin-injection-produces-long-lasting-hypersensitivity-with-characteristics-of-neuropathic-pain
#18
Ana Belen Salinas-Abarca, Sabino Hazael Avila-Rojas, Paulino Barragán-Iglesias, Jorge Baruch Pineda-Farias, Vinicio Granados-Soto
The purpose of this study was to investigate whether 1%, 2% or 5% formalin injection produce hypersensitivity with characteristics of the neuropathic pain induced by spinal nerve injury. Formalin injection (1%, 2% and 5%) produced concentration-dependent long-lasting (at least 14 days) mechanical allodynia and hyperalgesia in both paws. Likewise, L5/L6 spinal nerve ligation induced allodynia and hyperalgesia in both paws. The intensity of hypersensitivity was greater in the ipsilateral than in the contralateral paw in all models...
January 14, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28093336/peripheral-nerve-injury-potentiates-excitatory-synaptic-transmission-in-locus-coeruleus-neurons
#19
Kambiz Rohampour, Hossein Azizi, Yaghoub Fathollahi, Saeed Semnanian
Peripheral nerve injury (PNI) is believed to cause maladaptive changes at synaptic level, leading to neuropathic pain which is difficult to treat with common analgesic drugs. Noradrenergic locus coeruleus (LC) neurons have a crucial role in neuropathic pain modulation. In this study we examined whether chronic constriction injury (CCI) could affect glutamatergic synaptic transmission in LC neurons. CCI was performed on P10 to P12 Sprague Dawley pups. Seven days after CCI, horizontal slices of brainstem (300μm thick) were prepared and whole-cell patch clamp recording was performed...
January 13, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28093260/shear-and-pressure-under-the-first-ray-in-neuropathic-diabetic-patients-implications-for-support-of-the-longitudinal-arch
#20
Brian Davis, Mariam Crow, Visar Berki, Daniela Ciltea
OBJECTIVE: To assess dynamic arch support in diabetic patients at risk for Charcot neuroarthopathy whose arch index has not yet shown overt signs of foot collapse. METHODS: Two indirect measures of toe flexor activation (ratios: peak hallux pressure to peak metatarsal pressure - Ph/Pm; peak posterior hallux shear to peak posterior metatarsal shear - Sh/Sm) were obtained with a custom built system for measuring shear and pressure on the plantar surface of the foot during gait...
December 29, 2016: Journal of Biomechanics
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