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https://www.readbyqxmd.com/read/29225183/ca2-mediates-axotomy-induced-necrosis-and-apoptosis-of-satellite-glial-cells-remote-from-the-transection-site-in-the-isolated-crayfish-mechanoreceptor
#1
Andrey Khaitin, Mikhail Rudkovskii, Anatoly Uzdensky
Severe nerve injury such as axotomy induces neuron degeneration and death of surrounding glial cells. Using a crayfish stretch receptor that consists of a single mechanoreceptor neuron enveloped by satellite glia, we showed that axotomy not only mechanically injures glial cells at the transection location, but also induces necrosis or apoptosis of satellite glial cells remote from the transection site. We studied Ca2+role in spontaneous or axotomy-induced death of remote glial cells. Stretch receptors were isolated using the original technique that kept the neuron connected to the ventral cord ganglion (control preparations)...
December 7, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/29223072/alteration-of-autophagy-related-proteins-in-peripheral-blood-mononuclear-cells-of-patients-with-parkinson-s-disease
#2
Yasuo Miki, Shuji Shimoyama, Tomoya Kon, Tatsuya Ueno, Ryo Hayakari, Kunikazu Tanji, Tomoh Matsumiya, Eiki Tsushima, Fumiaki Mori, Koichi Wakabayashi, Masahiko Tomiyama
Previous postmortem studies demonstrated dysregulation of autophagy in patients with Parkinson's disease (PD). To clarify whether this alteration reflects a fundamental aspect of PD or represents the final stage of autophagy dysregulation resulting from a long neurodegenerative process, we focused on basal autophagy in peripheral blood mononuclear cells (PBMCs) of PD patients (n = 35) and controls (n = 23). The whole-transcriptome assay revealed downregulation of mRNAs for 6 core regulators of autophagy (UNC-51-like kinase [ULK] 3, autophagy-related [Atg] 2A, Atg4B, Atg5, Atg16L1, and histone deacetylase 6)...
November 21, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29222770/ocular-nerve-growth-factor-ngf-and-ngf-eye-drop-application-as-paradigms-to-investigate-ngf-neuroprotective-and-reparative-actions
#3
Paola Tirassa, Pamela Rosso, Angela Iannitelli
The eye is a central nervous system structure that is uniquely accessible to local treatment. Through the ocular surface, it is possible to access the retina, optic nerve, and brain. Animal models of retina degeneration or optic nerve crush could thus serve as tools to investigate whether and how factors, which are anterogradely or retrogradely transported through the optic nerve, might contribute to activate neuroprotection and eventually regeneration. Among these factors, nerve growth factor (NGF) plays a crucial role during development of the visual system, as well as during the entire life span, and in pathological conditions...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29222126/autoimmune-crmp5-neuropathy-phenotype-and-outcome-defined-from-105-cases
#4
Divyanshu Dubey, Vanda A Lennon, Avi Gadoth, Sean J Pittock, Eoin P Flanagan, John E Schmeling, Andrew McKeon, Christopher J Klein
OBJECTIVE: To establish the phenotype and clinical outcomes of collapsin response-mediator protein-5 (CRMP5) autoimmune neuropathy in comparison with anti-neuronal nuclear antibody type 1 (ANNA1)-immunoglobulin G (IgG) neuropathy. METHODS: Patients with CRMP5-IgG and/or ANNA1-IgGs were identified in our service-line testing, and medical records were reviewed. RESULTS: One hundred five patients with CRMP5-IgG neuropathy (88% smokers; 69% having cancer, most commonly small cell lung cancer [75%]) were identified and compared to 51 patients with ANNA1-IgG neuropathy, 27 with coexisting CRMP5-IgG...
December 8, 2017: Neurology
https://www.readbyqxmd.com/read/29220864/the-nature-of-catecholamine-containing-neurons-in-the-enteric-nervous-system-in-relationship-with-organogenesis-normal-human-anatomy-and-neurodegeneration
#5
G Natale, L Ryskalin, C L Busceti, F Biagioni, F Fornai
The gastrointestinal tract is provided with extrinsic and intrinsic innervation. The extrinsic innervation includes the classic vagal parasympathetic and sympathetic components, with afferent sensitive and efferent secretomotor fibers. The intrinsic innervations is represented by the enteric nervous system (ENS), which is recognized as a complex neural network controlling a variety of cell populations, including smooth muscle cells, mucosal secretory cells, endocrine cells, microvasculature, immune and inflammatory cells...
September 1, 2017: Archives Italiennes de Biologie
https://www.readbyqxmd.com/read/29217686/synaptic-regulator-%C3%AE-synuclein-in-dopaminergic-fibers-is-essentially-required-for-the-maintenance-of-subependymal-neural-stem-cells
#6
Ana Perez-Villalba, Mª Salomé Sirerol-Piquer, Germán Belenguer, Raúl Soriano-Cantón, Ana Belén Muñoz-Manchado, Javier Villadiego, Diana Alarcón-Arís, Federico N Soria, Benjamin Dehay, Erwan Bezard, Miquel Vila, Analía Bortolozzi, Juan José Toledo-Aral, Francisco Pérez-Sánchez, Isabel Fariñas
Synaptic protein α-synuclein (α-SYN) modulates neurotransmission in a complex and poorly understood manner and aggregates in the cytoplasm of degenerating neurons in Parkinson's disease. Here, we report that α-SYN present in dopaminergic nigral afferents is essential for the normal cycling and maintenance of neural stem cells (NSCs) in the brain subependymal zone of adult male and female mice. We also show that premature senescence of adult NSCs into non-neurogenic astrocytes in mice lacking α-SYN resembles the effects of dopaminergic fiber degeneration resulting from chronic exposure to MPTP or intranigral inoculation of aggregated toxic α-SYN...
December 6, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29215065/toll-like-receptor-activation-induces-degeneration-of-human-intervertebral-discs
#7
Emerson Krock, Derek H Rosenzweig, J Brooke Currie, Daniel G Bisson, Jean A Ouellet, Lisbet Haglund
Toll-like receptors (TLR) are activated by endogenous alarmins such as fragmented extracellular matrix compounds found in the degenerating disc. TLRs regulate cytokine, neurotrophin, and protease expression in human disc cells in vitro, and thus control key factors in disc degeneration. However, whether TLR activation leads to degenerative changes in intact human discs is unclear. Nucleus pulposus (NP) cells isolated from non-degenerating discs increase IL-1β and nerve growth factor gene expression following treatment with Pam2CSK4 (TLR2/6 agonist) but not Pam3CSK4 (TLR1/2 agonist)...
December 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29209768/spread-of-aggregates-after-olfactory-bulb-injection-of-%C3%AE-synuclein-fibrils-is-associated-with-early-neuronal-loss-and-is-reduced-long-term
#8
Nolwen L Rey, Sonia George, Jennifer A Steiner, Zachary Madaj, Kelvin C Luk, John Q Trojanowski, Virginia M-Y Lee, Patrik Brundin
Parkinson's disease is characterized by degeneration of substantia nigra dopamine neurons and by intraneuronal aggregates, primarily composed of misfolded α-synuclein. The α-synuclein aggregates in Parkinson's patients are suggested to first appear in the olfactory bulb and enteric nerves and then propagate, following a stereotypic pattern, via neural pathways to numerous regions across the brain. We recently demonstrated that after injection of either mouse or human α-synuclein fibrils into the olfactory bulb of wild-type mice, α-synuclein fibrils recruited endogenous α-synuclein into pathological aggregates that spread transneuronally to over 40 other brain regions and subregions, over 12 months...
December 5, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/29204309/laser-application-in-neurosurgery
#9
REVIEW
Evgenii Belykh, Kaan Yagmurlu, Nikolay L Martirosyan, Ting Lei, Mohammadhassan Izadyyazdanabadi, Kashif M Malik, Vadim A Byvaltsev, Peter Nakaji, Mark C Preul
Background: Technological innovations based on light amplification created by stimulated emission of radiation (LASER) have been used extensively in the field of neurosurgery. Methods: We reviewed the medical literature to identify current laser-based technological applications for surgical, diagnostic, and therapeutic uses in neurosurgery. Results: Surgical applications of laser technology reported in the literature include percutaneous laser ablation of brain tissue, the use of surgical lasers in open and endoscopic cranial surgeries, laser-assisted microanastomosis, and photodynamic therapy for brain tumors...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/29203228/mild-fluid-percussion-injury-induces-diffuse-axonal-damage-and-reactive-synaptic-plasticity-in-the-mouse-olfactory-bulb
#10
Melissa A Powell, Raiford T Black, Terry L Smith, Thomas M Reeves, Linda L Phillips
Despite the regenerative capacity of the olfactory bulb (OB), head trauma causes olfactory disturbances in up to 30% of patients. While models of olfactory nerve transection, olfactory receptor neuron (ORN) ablation, or direct OB impact have been used to examine OB recovery, these models are severe and not ideal for study of OB synaptic repair. We posited that a mild fluid percussion brain injury (mFPI), delivered over mid-dorsal cortex, would produce diffuse OB deafferentation without confounding pathology...
December 1, 2017: Neuroscience
https://www.readbyqxmd.com/read/29200480/stitchless-percutaneous-endoscopic-cervical-discectomy-are-we-moving-towards-day-care-discectomy-procedure
#11
Sunil M Nadkarni, Pavankumar Kohli, Bhupesh Patel, Satishchandra Gore, Bhagyashree S Kulkarni
Background: STITCHLESS percutaneous endoscopic cervical discectomy s[PECD] is safe, precise, targeted, and a complete endoscopic procedure to treat soft cervical disc herniation with unilateral radiculopathy. It allows direct visualization of herniated fragment and its removal, inspection of decompressed nerve root in an awake and aware patient. It reduces the risk related to general anesthesia and to the neurological structures. However, all the patients treated with PECD can be candidates for anterior cervical discectomy and fusion (ACDF)...
November 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/29197538/orbital-frontal-nerve-schwannoma-distinctive-radiological-features
#12
Stephanie Ming Young, Yoon-Duck Kim, Gang Seok Jeon, Kyung In Woo
PURPOSE: To review the radiological findings of frontal nerve schwannoma of the orbit and determine distinguishing imaging features. DESIGN: Retrospective interventional case series Methods: SETTING: Single tertiary institution. PERIOD: September 1996 to December 2016. PATIENT POPULATION: 13 patients orbital frontal nerve schwannoma. INTERVENTION: Patients underwent surgical excision following preoperative imaging...
November 29, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29194538/mitochondrial-abnormalities-and-disruption-of-the-neuromuscular-junction-precede-the-clinical-phenotype-and-motor-neuron-loss-in-hfuswt-transgenic-mice
#13
Eva So, Jacqueline C Mitchell, Caroline Memmi, George Chennell, Gema Vizcay-Barrena, Leanne Allison, Christopher E Shaw, Caroline Vance
FUS mislocalisation and cytoplasmic aggregation are hallmark pathologies in FUS-related amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). Many of the mechanistic hypotheses have focused on a loss of nuclear function in the FUS-opathies, implicating dysregulated RNA transcription and splicing in driving neurodegeneration. Recent studies describe an additional somato-dendritic localisation for FUS in the cerebral cortex implying a regulatory role in mRNA transport and local translation at the synapse...
November 28, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29191802/peripheral-neuropathy-induced-by-microtubule-targeted-chemotherapies-insights-into-acute-injury-and-long-term-recovery
#14
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/29190980/transplanted-olfactory-ensheathing-cells-restore-retinal-function-in-a-rat-model-of-light-induced-retinal-damage-by-inhibiting-oxidative-stress
#15
Langyue Xue, Yuxiao Zeng, Qiyou Li, Yijian Li, Zhengya Li, Haiwei Xu, Zhengqin Yin
There is still not an effective treatment for continuous retinal light exposure and subsequent photoreceptor degeneration. Olfactory ensheathing cell (OEC) transplantation has been shown to be neuroprotective in spinal cord, and optic nerve injury and retinitis pigmentosa. However, whether OECs protect rat photoreceptors against light-induced damage and how this may work is unclear. Thus, to elucidate this mechanism, purified rat OECs were grafted into the subretinal space of a Long-Evans rat model with light-induced photoreceptor damage...
November 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/29190030/visualizing-astrocytes-of-the-optic-nerve
#16
Daniel Sun
Astrocytes make up approximately 30% of all the cells in the mammalian central nervous system. They are not passive, as once thought, but are integral to brain physiology and perform many functions that are important for normal neuronal development and metabolism, synapse formation, synaptic transmission, and in repair following injury/disease. Astrocytes also communicate with neurons, blood vessels, and other types of glial cells. Astrocytes within the optic nerve head region play a key role in glaucomatous axon degeneration...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29190028/in-vitro-and-in-vivo-methods-for-studying-retinal-ganglion-cell-survival-and-optic-nerve-regeneration
#17
Yuqin Yin, Larry I Benowitz
Glaucoma is marked by a progressive degeneration of the optic nerve and delayed loss of retinal ganglion cells (RGCs), the projection neurons of the eye. Because RGCs are not replaced and because surviving RGCs cannot regenerate their axons, the visual loss in glaucoma is largely irreversible. Here, we describe methods to evaluate treatments that may be beneficial for treating glaucoma using in vitro cell culture models (immunopanning to isolate neonatal RGCs, dissociated mature retinal neurons, retinal explants) and in vivo models that test potential treatments or investigate underlying molecular mechanisms in an intact system...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29189520/the-middle-ear-muscle-reflex-in-rat-developing-a-biomarker-of-auditory-nerve-degeneration
#18
Mark E Chertoff, Ashley Martz, Joey T Sakumura, Aryn M Kamerer, Francisco Diaz
OBJECTIVES: The long-term goal of this research is to determine whether the middle ear muscle reflex can be used to predict the number of healthy auditory nerve fibers in hearing-impaired ears. In this study, we develop a high-impedance source and an animal model of the middle ear muscle reflex and explore the influence of signal frequency and level on parameters of the reflex to determine an optimal signal to examine auditory nerve fiber survival. DESIGN: A high-impedance source was developed using a hearing aid receiver attached to a 0...
November 17, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/29179284/-analysis-of-correlation-between-spinal-nerve-high-tension-and-disc-degeneration-in-100-cases
#19
Q J Kong, X M Xu, J C Sun, Y Wang, G D Shi, Y F Guo, H S Yang, Y Yang, J G Shi
Objective: To explore the correlation between the spinal nerve high tension and lumbar disc degeneration, the pathogenesis of hanging intervertebral disc degeneration. Methods: From June 2016 to June , a retrospective analysis 2017 of 100 cases of lumbar spinal stenosis were included in Department of Spine Surgery, Changzheng Hospital, the Second Military Medical University. They were divided into experimental group (50 cases, nerve high tension group) and control group (50 cases, nervous tension in the normal group) according to preoperative lumbar MRI of cauda equina syndrome and settlement of intraoperative detecting nerve tension...
November 21, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29178917/the-influence-of-surface-emg-triggered-multichannel-electrical-stimulation-on-sensomotoric-recovery-in-patients-with-lumbar-disc-herniation-study-protocol-for-a-randomized-controlled-trial-reco
#20
Sara Lener, Christoph Wipplinger, Sebastian Hartmann, Wolfgang N Löscher, Sabrina Neururer, Matthias Wildauer, Claudius Thomé, Anja Tschugg
BACKGROUND: Intervertebral disc degeneration is one of the most common reasons for chronic low back pain and sensomotoric deficits, often treated by lumbar sequestrectomy. Nevertheless, the prognostic factors relevant for time and quality of recovery, of the surgical procedure, relative to conservative treatment, remain controversial and require further investigation. Surface electrical stimulation (SES) may be an influential intervention, already showing positive impact on motor and sensory recovery in different patient groups...
November 25, 2017: Trials
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