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Peripheral nerves regeneration

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https://www.readbyqxmd.com/read/28645526/injury-induced-gp130-cytokine-signaling-in-peripheral-ganglia-is-reduced-in-diabetes-mellitus
#1
Jon P Niemi, Angela R Filous, Alicia DeFrancesco, Jane A Lindborg, Nisha A Malhotra, Gina N Wilson, Bowen Zhou, Samuel D Crish, Richard E Zigmond
Neuropathy is a major diabetic complication. While the mechanism of this neuropathy is not well-understood, it is believed to result in part from deficient nerve regeneration. Work from our laboratory established that gp130 family of cytokines are induced in animals after axonal injury and are involved in the induction of regeneration-associated genes (RAGs) and in the conditioning lesion response. Here, we examine whether a reduction of cytokine signaling occurs in diabetes. Streptozotocin (STZ) was used to destroy pancreatic β cells, leading to chronic hyperglycemia...
June 20, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28645295/identification-of-the-flotillin-1-2-heterocomplex-as-a-target-of-autoantibodies-in-bona-fide-multiple-sclerosis
#2
S Hahn, G Trendelenburg, M Scharf, Y Denno, S Brakopp, B Teegen, C Probst, K P Wandinger, M Buttmann, A Haarmann, F Szabados, M Vom Dahl, T Kümpfel, P Eichhorn, H Gold, F Paul, S Jarius, N Melzer, W Stöcker, L Komorowski
BACKGROUND: Autoantibodies, in particular those against aquaporin-4 and myelin-oligodendrocyte glycoprotein (MOG), aid as biomarkers in the differential diagnosis of demyelination. Here, we report on discovery of autoantibodies against flotillin in patients with multiple sclerosis (MS). METHODS: The target antigen was identified by histo-immunoprecipitation using the patients' sera and cryosections of rat or pig cerebellum combined with mass spectrometrical analysis...
June 23, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28642578/human-endothelial-cells-secrete-neurotropic-factors-to-direct-axonal-growth-of-peripheral-nerves
#3
Jonathan M Grasman, David L Kaplan
Understanding how nerves spontaneously innervate tissues or regenerate small injuries is critical to enhance material-based interventions to regenerate large scale, traumatic injuries. During embryogenesis, neural and vascular tissues form interconnected, complex networks as a result of signaling between these tissue types. Here, we report that human endothelial cells (HUVECs) secrete brain-derived neurotrophic factor (BDNF), which significantly stimulated axonal growth from chicken or rat dorsal root ganglia (DRGs)...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28638701/reinnervation-of-denervated-muscle-by-implantation-of-nerve-muscle-endplate-band-graft-to-the-native-motor-zone-of-the-target-muscle
#4
Liancai Mu, Stanislaw Sobotka, Jingming Chen, Themba Nyirenda
INTRODUCTION: Motor endplate reinnervation is critical for restoring motor function of the denervated muscle. We developed a novel surgical technique called nerve-muscle-endplate band grafting (NMEG) for muscle reinnervation. METHODS: Experimentally denervated sternomastoid muscle in the rat was reinnervated by transferring a NMEG from the ipsilateral sternohyoid muscle to the native motor zone (NMZ) of the target muscle. A NMEG pedicle contained a block of muscle (~ 6 × 6 × 3 mm), a nerve branch with axon terminals, and a motor endplate band with numerous neuromuscular junctions...
June 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28632137/electrospun-silk-polyaniline-conduits-for-functional-nerve-regeneration-in-rat-sciatic-nerve-injury-model
#5
Suradip Das, Manav Sharma, Dhiren Saharia, Kushal Sarma, Elizabeth Muir, Utpal Bora
The present study describes the fabrication of polyaniline-silk fibroin nanocomposite based nerve conduits and its subsequent implantation in a rat sciatic nerve injury model for peripheral nerve regeneration. This is the first in vivo study of polyaniline based nerve conduit describing the safety and efficacy of the conduits in treating peripheral nerve injuries. The nanocomposite was synthesised by electrospinning a mixture of silk fibroin protein and polyaniline wherein the silk nanofibers were observed to be uniformly coated with polyaniline nanoparticles...
June 20, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28630754/nerve-injuries-of-the-upper-extremity-and-hand
#6
Lars B Dahlin, Mikael Wiberg
A nerve injury has a profound impact on the patient's daily life due to the impaired sensory and motor function, impaired dexterity, sensitivity to cold as well as eventual pain problems.To perform an appropriate treatment of nerve injuries, a correct diagnosis must be made, where the injury is properly classified, leading to an optimal surgical approach and technique, where timing of surgery is also important for the outcome.Knowledge about the nerve regeneration process, where delicate processes occur in neurons, non-neuronal cells (i...
May 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28630333/boosting-cns-axon-regeneration-by-harnessing-antagonistic-effects-of-gsk3-activity
#7
Marco Leibinger, Anastasia Andreadaki, Renate Golla, Evgeny Levin, Alexander M Hilla, Heike Diekmann, Dietmar Fischer
Implications of GSK3 activity for axon regeneration are often inconsistent, if not controversial. Sustained GSK3 activity in GSK3(S/A) knock-in mice reportedly accelerates peripheral nerve regeneration via increased MAP1B phosphorylation and concomitantly reduces microtubule detyrosination. In contrast, the current study shows that lens injury-stimulated optic nerve regeneration was significantly compromised in these knock-in mice. Phosphorylation of MAP1B and CRMP2 was expectedly increased in retinal ganglion cell (RGC) axons upon enhanced GSK3 activity, but, surprisingly, no GSK3-mediated CRMP2 inhibition was detected in sciatic nerves, thus revealing a fundamental difference between central and peripheral axons...
June 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28629798/proteomic-analysis-of-mesenchymal-to-schwann-cell-transdifferentiation
#8
Anup D Sharma, Jayme Wiederin, Metin Uz, Pawel Ciborowski, Surya K Mallapragada, Howard E Gendelman, Donald S Sakaguchi
While transplantation of Schwann cells facilitates axon regeneration, remyelination and repair after peripheral nerve injury clinical use is limited by cell bioavailability. We posit that such limitation in cell access can be overcome by the use of autologous bone-marrow derived mesenchymal stem cells (MSCs). As MSCs can transdifferentiate to Schwann cell-phenotypes and accelerate nerve regeneration we undertook proteomic evaluation of the cells to uncover the protein contents that affects Schwann cell formulation...
June 16, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28624802/heparin-based-coacervate-of-bfgf-facilitates-peripheral-nerve-regeneration-by-inhibiting-endoplasmic-reticulum-stress-following-sciatic-nerve-injury
#9
Rui Li, Shuang Zou, Yanqing Wu, Yiyang Li, Sinan Khor, Yuqin Mao, Huacheng He, Ke Xu, Hongyu Zhang, Xiaokun Li, Jian Wang, Huai Jiang, Qike Jin, Qingsong Ye, Zhouguang Wang, Jian Xiao
Creating a microenvironment at the injury site that favors axonal regrowth and remyelinationis pivotal to the success of therapeutic reinnervation. The mature myelin sheath of the peripheral nervous system depends on active participation of Schwann cells to form new cytoskeletal components and tremendous amounts of relevant neurotrophic factors. In this study, we utilized a new biomaterial for growth factor delivery consisting of a biocompatible polycation, poly(ethylene argininylaspartatediglyceride) and heparin...
May 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28622711/curcumin-accelerates-the-repair-of-sciatic-nerve-injury-in-rats-through-reducing-schwann-cells-apoptosis-and-promoting-myelinization
#10
Zhiwei Zhao, Xiaoling Li, Qing Li
BACKGROUND: Schwann cells (SCs) play an indispensable role in the repair and regeneration of injured peripheral nerve. Curcumin can reduce SCs apoptosis, and promote the regeneration and functional recovery of injured peripheral nerves. However, the corresponding mechanisms are not clear. OBJECTIVE: The article was aimed to explore the effect and corresponding mechanisms of curcumin on the repair of sciatic nerve injury in rats. METHODS: After surgery induced sciatic nerve injury, the model rats were divided into three groups and treated with curcumin, curcumin+PD98059 and curcumin+IGF-1 respectively for 4days...
June 12, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28621200/muscle-derived-stem-cells-in-peripheral-nerve-regeneration-reality-or-illusion
#11
Jing Zhou, Haiyan Cui, Haibin Lu, Zhuqiu Xu, Weifeng Feng, Lulu Chen, Xiaolei Jin, Xiaonan Yang, Zuoliang Qi
Owing to the complicated and time-consuming regenerative process, the repair of injured peripheral nerves depends largely on ongoing stem-cell therapy. Decades ago, researchers successfully isolated and identified muscle-derived stem cells (MDSCs) and discovered their potential for multidifferentiation. MDSCs play an important role in trauma repair associated with neuromuscular and vascular injury by simultaneously promoting tissue regrowth via direct differentiation and systematic secretion under physiological conditions...
June 16, 2017: Regenerative Medicine
https://www.readbyqxmd.com/read/28621199/sciatic-nerve-regeneration-by-transplantation-of-in-vitro-differentiated-nucleus-pulposus-progenitor-cells
#12
Takayuki Ishii, Daisuke Sakai, Jordy Schol, Tomoko Nakai, Kaori Suyama, Masahiko Watanabe
AIM: To assess the applicability of mouse intervertebral disc-derived nucleus pulposus (NP) progenitor cells as a cell source for sciatic nerve regeneration. MATERIALS & METHODS: P0-Cre/Floxed-EGFP-transgenic mouse-derived NP progenitor cells were differentiated to Schwann-like cells in conventional induction medium. Schwann-like cells were subsequently transplanted into a mouse model of sciatic nerve transection, and nerve regeneration assessed by immunohistochemistry, electron microscopy and functional walking track analysis and heat stimulus reflex...
June 16, 2017: Regenerative Medicine
https://www.readbyqxmd.com/read/28620418/the-changes-in-rats-with-sciatic-nerve-crush-injury-supplemented-with-evening-primrose-oil-behavioural-morphologic-and-morphometric-analysis
#13
Danial Ramli, Izzuddin Aziz, Masro Mohamad, Dauda Abdulahi, Junedah Sanusi
Nerve crush injuries are commonly used models for axonotmesis to examine peripheral nerve regeneration. As evening primrose oil (EPO) is rich in omega-6 essential fatty acid component and gamma-linolenic acid, studies have shown the potential role of EPO in myelination. Seventy-two healthy adult Sprague-Dawley rats were classified into three groups: normal group, control group, and experimental group. The result indicates that there was significant difference in toe-spreading reflex between the normal and the control groups (1...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28616024/chronically-denervated-distal-nerve-stump-inhibits-peripheral-nerve-regeneration
#14
Giulia Ronchi, Stefania Raimondo
No abstract text is available yet for this article.
May 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28615804/the-neurochemistry-of-peripheral-nerve-regeneration
#15
Andreea Benga, Fatih Zor, Ahmet Korkmaz, Bogdan Marinescu, Vijay Gorantla
Peripheral nerve injuries (PNIs) can be most disabling, resulting in the loss of sensitivity, motor function and autonomic control in the involved anatomical segment. Although injured peripheral nerves are capable of regeneration, sub-optimal recovery of function is seen even with the best reconstruction. Distal axonal degeneration is an unavoidable consequence of PNI. There are currently few strategies aimed to maintain the distal pathway and/or target fidelity during regeneration across the zone of injury...
January 2017: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
https://www.readbyqxmd.com/read/28612296/kinesin-5-blocker-monastrol-protects-against-bortezomib-induced-peripheral-neurotoxicity
#16
Ilja Bobylev, Dominik Peters, Maulik Vyas, Mohammed Barham, Ines Klein, Elke Pogge von Strandmann, Wolfram F Neiss, Helmar C Lehmann
Neurotoxicity is a relevant side effect of bortezomib treatment. Previous reports have shown that the development of peripheral neuropathy caused by anti-neoplastic agents may be a result of reduced axonal transport. Based on evidence from prior studies that the kinesin-5 inhibitor monastrol enhances axonal transport and improves neuronal regeneration, we focused on the neuroprotective role of monastrol during the chemotherapeutic treatment with bortezomib. Prolonged treatment of C57BL/6 mice with bortezomib induced a length-dependent small-fiber neuropathy with axonal atrophy and loss of sensory nerve fibers...
June 13, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28611388/aberrant-plasticity-of-peripheral-sensory-axons-in-a-painful-neuropathy
#17
Takashi Hirai, Yatendra Mulpuri, Yanbing Cheng, Zheng Xia, Wei Li, Supanigar Ruangsri, Igor Spigelman, Ichiro Nishimura
Neuronal cells express considerable plasticity responding to environmental cues, in part, through subcellular mRNA regulation. Here we report on the extensive changes in distribution of mRNAs in the cell body and axon compartments of peripheral sensory neurons and the 3' untranslated region (3'UTR) landscapes after unilateral sciatic nerve entrapment (SNE) injury in rats. Neuronal cells dissociated from SNE-injured and contralateral L4 and L5 dorsal root ganglia were cultured in a compartmentalized system. Axonal and cell body RNA samples were separately subjected to high throughput RNA sequencing (RNA-Seq)...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28611218/immunoengineering-nerve-repair
#18
Nassir Mokarram, Kyle Dymanus, Akhil Srinivasan, Johnathan G Lyon, John Tipton, Jason Chu, Arthur W English, Ravi V Bellamkonda
Injuries to the peripheral nervous system are major sources of disability and often result in painful neuropathies or the impairment of muscle movement and/or normal sensations. For gaps smaller than 10 mm in rodents, nearly normal functional recovery can be achieved; for longer gaps, however, there are challenges that have remained insurmountable. The current clinical gold standard used to bridge long, nonhealing nerve gaps, the autologous nerve graft (autograft), has several drawbacks. Despite best efforts, engineering an alternative "nerve bridge" for peripheral nerve repair remains elusive; hence, there is a compelling need to design new approaches that match or exceed the performance of autografts across critically sized nerve gaps...
June 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28608475/the-natural-history-of-recoverable-vocal-fold-paralysis-implications-for-kinetics-of-reinnervation
#19
Ted Mau, Hao-Min Pan, Lesley F Childs
OBJECTIVES/HYPOTHESIS: Patients with unilateral vocal fold paralysis (UVFP) are commonly told to wait 12 months for spontaneous recovery. This study aims to 1) determine the time to vocal recovery in UVFP, 2) use that data to develop a neurophysiologically plausible model for recovery, and 3) use the model to generate meaningful predictions for patient counseling. STUDY DESIGN: Case series with de novo mathematical modeling. METHODS: Patients with UVFP who could pinpoint a discrete onset of vocal improvement were identified...
June 13, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28604272/the-use-of-sheep-as-a-model-for-studying-peripheral-nerve-regeneration-following-nerve-injury-review-of-the-literature
#20
Camila Cardoso Diogo, José Arthur Camassa, José Eduardo Pereira, Luís Maltez da Costa, Vítor Filipe, Pedro Alexandre Couto, Stefano Geuna, Ana Colette Maurício, Artur Severo Varejão
Peripheral nerve injury and regeneration is a challenging scientific field with relevant clinical implications. Most peripheral nerve regeneration studies have been mainly carried out on rodents. However, it is important to note that the validity of the rodent as a model to study nerve injury and regeneration and translate these results into clinical practice has been questioned by several researchers. To overcome this problem, some investigators have used companion animals and large animal species as models for experimental peripheral nerve regeneration studies...
June 11, 2017: Neurological Research
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