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https://www.readbyqxmd.com/read/28647468/influence-of-rabbit-notochordal-cells-on-symptomatic-intervertebral-disc-degeneration-anti-angiogenic-capacity-on-human-endothelial-cell-proliferation-under-hypoxia
#1
Woo-Keun Kwon, Hong Joo Moon, Taek-Hyun Kwon, Youn-Kwan Park, Joo Han Kim
OBJECTIVES: Symptomatic degenerative disc disease (DDD) is associated with neovascularization and nerve ingrowth into intervertebral discs (IVDs). Notochordal cells (NCs) are key cells that may lead to regeneration of IVDs. However, their activities under conditions of hypoxia, the real environment of IVD, are not well known. We hypothesized that NCs may inhibit neovascularization by interacting with endothelial cells (ECs) under hypoxia. DESIGN: Human IVDs were isolated and cultured to produce nucleus pulposus (NP) cell conditioned medium (NPCM)...
June 21, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28645622/in-vivo-effects-of-knocking-down-metabotropic-glutamate-receptor-5-in-the-sod1-g93a-mouse-model-of-amyotrophic-lateral-sclerosis
#2
Tiziana Bonifacino, Luca Cattaneo, Elena Gallia, Aldamaria Puliti, Marcello Melone, Francesca Provenzano, Simone Bossi, Ilaria Musante, Cesare Usai, Fiorenzo Conti, Giambattista Bonanno, Marco Milanese
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disorder due to loss of upper and lower motor neurons (MNs). The mechanisms of neuronal death are largely unknown, thus prejudicing the successful pharmacological treatment. One major cause for MN degeneration in ALS is represented by glutamate(Glu)-mediated excitotoxicity. We have previously reported that activation of Group I metabotropic Glu receptors (mGluR1 and mGluR5) at glutamatergic spinal cord nerve terminals produces abnormal Glu release in the widely studied SOD1(G93A) mouse model of ALS...
June 20, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28644430/the-clinical-landscape-for-sma-in-a-new-therapeutic-era
#3
REVIEW
K Talbot, E F Tizzano
Despite significant advances in basic research, the treatment of degenerative diseases of the nervous system remains one of the greatest challenges for translational medicine. The childhood onset motor neuron disorder spinal muscular atrophy (SMA) has been viewed as one of the more tractable targets for molecular therapy, due to a detailed understanding of the molecular genetic basis of the disease. In SMA, inactivating mutations in the SMN1 gene can be partially compensated for by limited expression of SMN protein from a variable number of copies of the SMN2 gene, which provides both a molecular explanation for phenotypic severity and a target for therapy...
June 23, 2017: Gene Therapy
https://www.readbyqxmd.com/read/28643176/a-promising-tool-in-retina-regeneration-current-perspectives-and-challenges-when-using-mesenchymal-progenitor-stem-cells-in-veterinary-and-human-ophthalmological-applications
#4
REVIEW
Anna Cislo-Pakuluk, Krzysztof Marycz
Visual impairment is a common ailment of the current world population, with more exposure to CCD screens and fluorescent lighting, approximately 285 billion people suffer from this deficiency and 13% of those are considered clinically blind. More common causes for visual impairment include age-related macular degeneration (AMD), glaucoma and diabetic retinopathy (Zhu et al. Molecular Medicine Reports, 2015; Kolb et al. 2007; Machalińska et al. Current Eye Research, 34(9),748-760, 2009) among a few. As cases of retinal and optic nerve diseases rise, it is vital to find a treatment, which has led to investigation of the therapeutic potential of various stem cells types (Bull et al...
June 22, 2017: Stem Cell Reviews
https://www.readbyqxmd.com/read/28642089/involvement-of-mapk-akt-gsk-3%C3%AE-and-ampk-mtor-signaling-pathways-in-protection-of-remote-glial-cells-from-axotomy-induced-necrosis-and-apoptosis-in-the-isolated-crayfish-stretch-receptor
#5
E V Berezhnaya, M Y Bibov, M A Komandirov, M A Neginskaya, M V Rudkovskii, A B Uzdensky
Severe mechanical nerve injury such as axotomy can lead to neuron degeneration and death of surrounding glial cells. We showed that axotomy not only mechanically injures glial cells at the cutting location, but also induces necrosis or apoptosis of satellite glial cells remote from the transection site. Therefore, axon integrity is necessary for survival of surrounding glial cells. We used the crayfish stretch receptor that consists of a single mechanoreceptor neuron enveloped by satellite glial cells as a simple, but informative model object in the study of the role of various signaling proteins in axotomy-induced death of remote glial cells...
June 19, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/28640632/gut-microbiota-nitric-oxide-and-microglia-as-pre-requisites-for-neurodegenerative-disorders
#6
Joyce Ka Yu Tse
Regulating fluctuating endogenous nitric oxide (NO) levels is necessary for proper physiological functions. Aberrant NO pathways are implicated in a number of neurological disorders, including Alzheimer's Disease (AD) and Parkinson's Disease. The mechanism of NO in oxidative and nitrosative stress with pathological consequences involves reactions with reactive oxygen species (e.g. superoxide) to form the highly reactive peroxynitrite, hydrogen peroxide, hypochloride ions and hydroxyl radical. NO levels are typically regulated by endogenous nitric oxide synthases (NOS), and inflammatory iNOS is implicated in the pathogenesis of neurodegenerative diseases, in which elevated NO mediates axonal degeneration and activates cyclooxygenases to provoke neuroinflammation...
June 22, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28632177/the-intersection-of-ngf-trka-signaling-and-amyloid-precursor-protein-processing-in-alzheimer-s-disease-neuropathology
#7
REVIEW
Nadia Canu, Giuseppina Amadoro, Viviana Triaca, Valentina Latina, Valentina Sposato, Veronica Corsetti, Cinzia Severini, Maria Teresa Ciotti, Pietro Calissano
Dysfunction of nerve growth factor (NGF) and its high-affinity Tropomyosin receptor kinase A (TrkA) receptor has been suggested to contribute to the selective degeneration of basal forebrain cholinergic neurons (BFCN) associated with the progressive cognitive decline in Alzheimer's disease (AD). The aim of this review is to describe our progress in elucidating the molecular mechanisms underlying the dynamic interplay between NGF/TrkA signaling and amyloid precursor protein (APP) metabolism within the context of AD neuropathology...
June 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28632034/recombinant-human-nerve-growth-factor-treatment-promotes-photoreceptor-survival-in-the-retinas-of-rats-with-retinitis-pigmentosa
#8
Marta Sacchetti, Flavio Mantelli, Maria Luisa Rocco, Alessandra Micera, Laura Brandolini, Laura Focareta, Claudio Pisano, Luigi Aloe, Alessandro Lambiase
PURPOSE: Increasing evidence suggests that nerve growth factor (NGF) exerts protective effects against retinal degeneration in animal models of retinitis pigmentosa (RP). This study aims at investigating the effects of intravitreal injection of recombinant human NGF (rhNGF) on retinal photoreceptors apoptosis in an animal model of RP, the Royal College of Surgeons (RCS) rats. METHODS: Thirty-six RCS rats were treated with intravitreal injection of rhNGF or murine NGF (mNGF) or vehicle at 20 postnatal days (pd) and sacrificed at 40 pd...
March 1, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28629926/different-functional-susceptibilities-of-mouse-retinal-ganglion-cell-subtypes-to-optic-nerve-crush-injury
#9
Zhen Puyang, Hai-Qing Gong, Shi-Gang He, John B Troy, Xiaorong Liu, Pei-Ji Liang
In optic neuropathies, the progressive deterioration of retinal ganglion cell (RGC) function leads to irreversible vision loss. Increasing experimental evidence suggests differing susceptibility for RGC functional subtypes. Here with multi-electrode array recordings, RGC functional loss was characterized at multiple time points in a mouse model of optic nerve crush. Firing rate, latency of response and receptive field size were analyzed for ON, OFF and ON-OFF RGCs separately. It was observed that responses and receptive fields of OFF cells were impaired earlier than ON cells after the injury...
June 16, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28627348/-effect-of-hydrogen-rich-water-on-the-cd34-expression-in-lesion-boundary-brain-tissue-of-rats-with-traumatic-brain-injury
#10
Ying Liu, Qing Lan, Difen Wang, Xianjun Chen, Jia Yuan, Hailing Zhang
OBJECTIVE: To observe the effect of hydrogen-rich water on the CD34 expression and angiogenesis in lesion boundary brain tissue of rats with traumatic brain injury (TBI). METHODS: A total of 54 adult male Sprague-Dawley (SD) rats were divided into three groups by random number table: namely sham-operated group (sham group), trauma group (TBI group), and trauma + hydrogen-rich water group (TBI+HW group), the rats in each group were subdivided into 1, 3 and 7 days subgroups according to the time points after trauma, with 6 rats in each subgroup...
March 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28622494/laryngeal-neuropathy-in-adult-goats-with-copper-deficiency
#11
R F A Sousa, V M Almeida, J E Neto, C W A Nascimento, G X Medeiros, R M T Medeiros, F Riet-Correa, F S Mendonça
The aim of this study was to elucidate the cause of a neurological syndrome characterized by stridor in adult goats with clinical signs of copper deficiency. The main clinical signs consisted of apathy, emaciation, pale mucous membranes, mucous nasal discharge, dyspnea, severe achromotrichia, diffuse alopecia, torpor, ataxia, and stridor. When the goats were forced to move, the stridor increased. In a herd of 194 Toggenburg goats, 10 adult goats with clinical signs of copper deficiency were removed from the herd and divided into 2 groups: group 1, which consisted of 4 nannies and 1 buck with stridor, and group 2, which consisted of 4 nannies and 1 buck without stridor...
July 2017: Veterinary Pathology
https://www.readbyqxmd.com/read/28620279/interleukin-6-deficiency-attenuates-retinal-ganglion-cell-axonopathy-and-glaucoma-related-vision-loss
#12
Franklin D Echevarria, Cathryn R Formichella, Rebecca M Sappington
The pleotropic cytokine interleukin-6 (IL-6) is implicated in retinal ganglion cell (RGC) survival and degeneration, including that associated with glaucoma. IL-6 protects RGCs from pressure-induced apoptosis in vitro. However, it is unknown how IL-6 impacts glaucomatous degeneration in vivo. To study how IL-6 influences glaucomatous RGC axonopathy, accompanying glial reactivity, and resultant deficits in visual function, we performed neural tracing, histological, and neurobehavioral assessments in wildtype (B6;129SF2/J; WT) and IL-6 knock-out mice (B6;129S2-IL6(t)(m1kopf)/J; IL-6-/-) after 8 weeks of unilateral or bilateral microbead-induced glaucoma (microbead occlusion model)...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28616715/effects-of-intravitreal-injection-of-bevacizumab-with-or-without-anterior-chamber-paracentesis-on-intraocular-pressure-and-peripapillary-retinal-nerve-fiber-layer-thickness-a-prospective-study
#13
Masoud Soheilian, Saeed Karimi, Talieh Montahae, Homayoun Nikkhah, Seyed Aliasghar Mosavi
PURPOSE: To investigate the effects of intravitreal injection of bevacizumab (IVB) with or without anterior chamber paracentesis on intraocular pressure (IOP) and peripapillary retinal nerve fiber layer (PRNFL) thickness. METHODS: In this prospective randomized clinical trial, 90 eyes with center involving diabetic macular edema or wet type age-related macular degeneration (AMD) were randomly assigned to receive IVB either without (group A) or with (group B) anterior chamber paracentesis...
June 14, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28616018/collapsin-response-mediator-protein-2-plays-a-major-protective-role-in-acute-axonal-degeneration
#14
REVIEW
Jian-Nan Zhang, Jan C Koch
Axonal degeneration is a key pathological feature in many neurological diseases. It often leads to persistent deficits due to the inability of axons to regenerate in the central nervous system. Therefore therapeutic approaches should optimally both attenuate axonal degeneration and foster axonal regeneration. Compelling evidence suggests that collapsin response mediator protein-2 (CRMP2) might be a molecular target fulfilling these requirements. In this mini-review, we give a compact overview of the known functions of CRMP2 and its molecular interactors in neurite outgrowth and in neurodegenerative conditions...
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/28600652/wallerian-demyelination-chronicle-of-a-cellular-cataclysm
#16
REVIEW
Nicolas Tricaud, Hwan Tae Park
Wallerian demyelination is characteristic of peripheral nerve degeneration after traumatic injury. After axonal degeneration, the myelinated Schwann cell undergoes a stereotypical cellular program that results in the disintegration of the myelin sheath, a process termed demyelination. In this review, we chronologically describe this program starting from the late and visible features of myelin destruction and going backward to the initial molecular steps that trigger the nuclear reprogramming few hours after injury...
June 9, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28594428/compromised-integrity-of-central-visual-pathways-in-patients-with-macular-degeneration
#17
Maka Malania, Julia Konrad, Herbert Jägle, John S Werner, Mark W Greenlee
Purpose: Macular degeneration (MD) affects the central retina and leads to gradual loss of foveal vision. Although, photoreceptors are primarily affected in MD, the retinal nerve fiber layer (RNFL) and central visual pathways may also be altered subsequent to photoreceptor degeneration. Here we investigate whether retinal damage caused by MD alters microstructural properties of visual pathways using diffusion-weighted magnetic resonance imaging. Methods: Six MD patients and six healthy control subjects participated in the study...
June 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28591276/comparison-of-optical-coherence-tomographic-findings-between-behcet-disease-patients-with-and-without-ocular-involvement-and-healthy-subjects
#18
Ayse Sevgi Karadag, Burak Bilgin, Merih Banu Soylu
Purpose: We aimed to compare the retinal nerve fiber layer, ganglion cell layer, inner plexiform layer, and the choroid thickness between patients with Behcet disease and healthy subjects by using spectral domain optical coherence tomography (SD-OCT). Methods: Ninety eyes of 45 healthy subjects and 104 eyes of 52 patients with Behcet disease were included in this study. Rheumatoid factor and C-reactive protein levels were measured by blood testing in the patients...
March 2017: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/28588446/purkinje-cell-degeneration-and-motor-coordination-deficits-in-a-new-mouse-model-of-autosomal-recessive-spastic-ataxia-of-charlevoix-saguenay
#19
Man Ding, Chao Weng, Shanghua Fan, Qian Cao, Zuneng Lu
Autosomal recessive spastic ataxia of Charlevoix-Saguenay (ARSACS) is an early-onset neurodegenerative disorder. In 2007, a novel locus, SAX2, which is located on chromosome 17p13 and contains 3 genes, ankyrin repeat and FYVE domain-containing 1 (ANKFY1), β-arrestin 2 (ARRB2) and kinesin family member 1C (KIF1C), was linked to ARSACS. We generated Ankfy1 heterozygous (Ankfy1/+) mice to establish an animal model and examine the pathophysiological basis of ARSACS. The transgenic mice displayed an abnormal gait with progressive motor and cerebellar nerve dysfunction that was highly reminiscent of ARSACS...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28574419/effect-of-intravitreal-ranibizumab-on-ganglion-cell-complex-and-peripapillary-retinal-nerve-fiber-layer-in-neovascular-age-related-macular-degeneration-using-spectral-domain-optical-coherence-tomography
#20
Ilaria Zucchiatti, Maria V Cicinelli, Maurizio Battaglia Parodi, Luisa Pierro, Marco Gagliardi, Agostino Accardo, Francesco Bandello
PURPOSE: To analyze the changes in ganglion cell complex and peripapillary retinal nerve fiber layer thickness, in central macular thickness and choroidal thickness on spectral domain optical coherence tomography in patients with neovascular age-related macular degeneration treated with intravitreal ranibizumab injections. METHODS: All consecutive patients with untreated neovascular age-related macular degeneration received loading phase of three monthly intravitreal ranibizumab, followed by retreatments on a pro re nata protocol for 12 months...
July 2017: Retina
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