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https://www.readbyqxmd.com/read/28320099/light-emitting-diode-led-therapy-improves-occipital-cortex-damage-by-decreasing-apoptosis-and-increasing-bdnf-expressing-cells-in-methanol-induced-toxicity-in-rats
#1
Amir Ghanbari, Majid Ghareghani, Kazem Zibara, Hamdallah Delaviz, Elham Ebadi, Mohammad Hossein Jahantab
Methanol-induced retinal toxicity, frequently associated with elevated free radicals and cell edema, is characterized by progressive retinal ganglion cell (RGC) death and vision loss. Previous studies investigated the effect of photomodulation on RGCs, but not the visual cortex. In this study, the effect of 670nm Light-Emitting Diode (LED) therapy on RGCs and visual cortex recovery was investigated in a seven-day methanol-induced retinal toxicity protocol in rats. Methanol administration showed a reduction in the number of RGCs, loss of neurons (neuronal nuclear antigen, NeuN+), activation of glial fibrillary acidic protein (GFAP+) expressing cells, suppression of brain-derived neurotrophic factor (BDNF+) positive cells, increase in apoptosis (caspase 3+) and enhancement of nitric oxide (NO) release in serum and brain...
March 17, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28318976/assembly-of-cns-nodes-of-ranvier-in-myelinated-nerves-is-promoted-by-the-axon-cytoskeleton
#2
Veronica Brivio, Catherine Faivre-Sarrailh, Elior Peles, Diane L Sherman, Peter J Brophy
Nodes of Ranvier in the axons of myelinated neurons are exemplars of the specialized cell surface domains typical of polarized cells. They are rich in voltage-gated sodium channels (Nav) and thus underpin rapid nerve impulse conduction in the vertebrate nervous system [1]. Although nodal proteins cluster in response to myelination, how myelin-forming glia influence nodal assembly is poorly understood. An axoglial adhesion complex comprising glial Neurofascin155 and axonal Caspr/Contactin flanks mature nodes [2]...
March 11, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28304238/remote-motor-system-metabolic-profile-and-surgery-outcome-in-cervical-spondylotic-myelopathy
#3
Sorin C Craciunas, Mircea R Gorgan, Bogdan Ianosi, Phil Lee, Joseph Burris, Carmen M Cirstea
OBJECTIVE In patients with cervical spondylotic myelopathy (CSM), the motor system may undergo progressive functional/structural changes rostral to the lesion, and these changes may be associated with clinical disability. The extent to which these changes have a prognostic value in the clinical recovery after surgical treatment is not yet known. In this study, magnetic resonance spectroscopy (MRS) was used to test 2 primary hypotheses. 1) Based on evidence of corticospinal and spinocerebellar, rubro-, or reticulospinal tract degeneration/dysfunction during chronic spinal cord compression, the authors hypothesized that the metabolic profile of the primary motor cortices (M1s) and cerebellum, respectively, would be altered in patients with CSM, and these alterations would be associated with the extent of the neurological disabilities...
March 17, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28303331/implication-of-vegf-and-aquaporin-4-mediating-m%C3%A3-ller-cell-swelling-to-diabetic-retinal-edema
#4
Teruyo Kida, Hidehiro Oku, Taeko Horie, Masanori Fukumoto, Yoshitaka Okuda, Seita Morishita, Tsunehiko Ikeda
PURPOSE: Aquaporin 4 (AQP4), a water channel protein, is known to be expressed in retinal Müller cells. The purpose of this study was to determine the effects of VEGF and AQP4 channels on the volumetric changes in Müller cells. METHODS: Retinas from diabetic rats and a cultured Müller cell line, TR-MUL5, were used in this study. Intravitreal injections of VEGF or PBS were performed on either streptozotocin (STZ)-induced diabetic or normoglycemic rats. Retinal sections were immunostained for anti-glial fibrillary acidic protein (GFAP), anti-AQP4, and anti-VEGF...
March 16, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28293644/t-lymphocytes-and-inflammatory-mediators-in-the-interplay-between-brain-and-blood-in-alzheimer-s-disease-potential-pools-of-new-biomarkers
#5
REVIEW
Anna Mietelska-Porowska, Urszula Wojda
Alzheimer's disease (AD) is a chronic neurodegenerative disorder and the main cause of dementia. The disease is among the leading medical concerns of the modern world, because only symptomatic therapies are available, and no reliable, easily accessible biomarkers exist for AD detection and monitoring. Therefore extensive research is conducted to elucidate the mechanisms of AD pathogenesis, which seems to be heterogeneous and multifactorial. Recently much attention has been given to the neuroinflammation and activation of glial cells in the AD brain...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28293643/neutrophils-infiltrate-the-spinal-cord-parenchyma-of-rats-with-experimental-diabetic-neuropathy
#6
Victoria L Newton, Jonathan D Guck, Mary A Cotter, Norman E Cameron, Natalie J Gardiner
Spinal glial cell activation and cytokine secretion have been implicated in the etiology of neuropathic pain in a number of experimental models, including diabetic neuropathy. In this study, streptozotocin- (STZ-) induced diabetic rats were either untreated or treated with gabapentin (50 mg/kg/day by gavage for 2 weeks, from 6 weeks after STZ). At 8 weeks after STZ, hypersensitivity was confirmed in the untreated diabetic rats as a reduced response threshold to touch, whilst mechanical thresholds in gabapentin-treated diabetic rats were no different from controls...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28290135/spinal-cord-injury-impairs-neurogenesis-and-induces-glial-reactivity-in-the-hippocampus
#7
Ignacio Jure, Luciana Pietranera, Alejandro F De Nicola, Florencia Labombarda
The incorporation of newborn neurons with increased synaptic remodeling and activity-dependent plasticity in the dentate gyrus enhances hippocampal-dependent learning performances. Astrocytes and microglial cells are components of the neurogenic niche and regulate neurogenesis under normal and neurophatological conditions leading to functional consequences for learning and memory. Although cognitive impairments were reported in patients after spinal cord injury (SCI), only few studies have considered remote changes in brain structures which are not related with sensory and motor cortex...
March 13, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28286110/fast-transdifferentiation-of-human-wharton-s-jelly-mesenchymal-stem-cells-into-neurospheres-and-nerve-like-cells
#8
A R Bonilla-Porras, C Velez-Pardo, M Jimenez-Del-Rio
BACKGROUND: The human mesenchymal stem cells derived from Wharton's jelly tissue (hWJ-MSCs) represent a tool for cell-based therapies and regenerative medicine. hWJ-MSCs form neurospheres (NSs) within 3-7 days. No data is available to establish the neuro-phenotypic markers and time of formation of nerve-like (NLCs) and glial cells from NSs derived from hWJ-MSCs. NEW METHOD: hWJ-MSCs were incubated with Fast-N-Spheres medium for 24 and 72h. The new formed NSs were in turn incubated with forskolin in neurogenic NeuroForsk medium for 1-7days...
March 8, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28280459/arundic-acid-prevents-developmental-upregulation-of-s100b-expression-and-inhibits-enteric-glial-development
#9
Marlene M Hao, Elena Capoccia, Carla Cirillo, Werend Boesmans, Pieter Vanden Berghe
S100B is expressed in various types of glial cells and is involved in regulating many aspects of their function. However, little is known about its role during nervous system development. In this study, we investigated the effect of inhibiting the onset of S100B synthesis in the development of the enteric nervous system, a network of neurons and glia located in the wall of the gut that is vital for control of gastrointestinal function. Intact gut explants were taken from embryonic day (E)13.5 mice, the day before the first immunohistochemical detection of S100B, and cultured in the presence of arundic acid, an inhibitor of S100B synthesis, for 48 h...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28276259/effects-of-eldepryl-on-glial-cell-proliferation-and-activation-in-the-substantia-nigra-and-striatum-in-a-rat-model-of-parkinson-s-disease
#10
Bin Liu, Chaonan Lv, Jinxia Zhang, Ying Liu, Jing Sun, Xiaohua Cheng, Wenjing Mao, Yuanyuan Ma, Shiying Li
OBJECTIVES: Inflammation is involved in the occurrence and progression of Parkinson's disease (PD), but the exact mechanisms remain unclear. This study aimed to observe the expressions of glial fibrillary acidic protein (GFAP) and integrin αM (CD11b) in the substantia nigra and striatum, and to investigate the effect of eldepryl on these expressions in a rat model of PD. METHODS: Seventy-two rats were randomly divided into three groups: control, model, and eldepryl...
March 9, 2017: Neurological Research
https://www.readbyqxmd.com/read/28273500/anti-inflammatory-role-of-leptin-in-glial-cells-through-p38-mapk-pathway-inhibition
#11
Iván Patraca, Nohora Martínez, Oriol Busquets, Aleix Martí, Ignacio Pedrós, Carlos Beas-Zarate, Miguel Marin, Miren Ettcheto, Francesc Sureda, Carme Auladell, Antoni Camins, Jaume Folch
BACKGROUND: In the present work, we studied the modulatory effect of Leptin (Lep) against pro-inflammatory cytokines, tumour necrosis factor-alpha (TNFα), interleukin 1-beta (IL1β) and interferon-gamma (IFNγ), in primary glial cell cultures. METHODS: Glial cultures were treated with pro-inflammatory cytokines (TNFα, 20ng/ml; IL1β, 20ng/ml; IFNγ 20ng/ml). Cells were pre-treated with Lep 500nM, 1h prior to cytokine treatment. NO released from glial cells was determined using the Griess reaction...
December 9, 2016: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28259830/six-month-delivery-of-gdnf-from-plga-vitamin-e-biodegradable-microspheres-after-intravitreal-injection-in-rabbits
#12
Cristina García-Caballero, Esther Prieto-Calvo, Patricia Checa-Casalengua, Elena García-Martín, Vicente Polo-Llorens, Julián García-Feijoo, Irene Teresa Molina-Martínez, Irene Bravo-Osuna, Rocío Herrero-Vanrell
Local long-term delivery of glial cell line derived neurotrophic factor (GDNF) from vitamin E/poly-lactic-co-glycolic acid microspheres (MSs) protects retinal ganglion cells in an animal model of glaucoma for up to 11weeks. However, the pharmacokinetics of GDNF after intravitreal injection of MSs is not known. We evaluated the GDNF levels after a single intravitreal injection of GDNF/VitE MSs. Biodegradable MSs were prepared by the solid-oil-in-water emulsion-solvent evaporation technique and characterized...
March 1, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28259175/pleiotrophin-regulates-microglia-mediated-neuroinflammation
#13
Rosalía Fernández-Calle, Marta Vicente-Rodríguez, Esther Gramage, Jimena Pita, Carmen Pérez-García, Marcel Ferrer-Alcón, María Uribarri, María P Ramos, Gonzalo Herradón
BACKGROUND: Pleiotrophin (PTN) is a cytokine found highly upregulated in the brain in different disorders characterized by overt neuroinflammation such as neurodegenerative diseases, drug addiction, traumatic injury, and ischemia. In the present work, we have explored whether PTN modulates neuroinflammation and if Toll-like receptor 4 (TLR4), crucial in the initiation of an immune response, is involved. METHODS: In immunohistochemistry assays, we studied lipopolysaccharide (LPS, 7...
March 4, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28254289/a-combination-of-gdnf-and-hucmsc-transplantation-loaded-on-sf-ags-composite-scaffolds-for-spinal-cord-injury-repair
#14
Genlong Jiao, Guofeng Lou, Yunfei Mo, Yongqin Pan, Ziyong Zhang, Rui Guo, Zhizhong Li
Spinal cord injury (SCI) is a severe trauma for which no effective treatment is currently available. In this study, a composited treatment system was prepared using a silk fibroin/alginates/glial cell line-derived neurotrophic factor (SF/AGs/GDNF) scaffold seeded with human umbilical cord mesenchymal stem cells (hUCMSCs) and the combined therapeutic effects of the composite scaffold to repair SCI rats were evaluated. The use of SF as a scaffold material could act as a biomimetic platform allowing neurons to properly accommodate and rebuild the target tissue...
May 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28249091/subretinal-glial-membranes-in-eyes-with-geographic-atrophy
#15
Malia M Edwards, D Scott McLeod, Imran A Bhutto, Rhonda Grebe, Maeve Duffy, Gerard A Lutty
Purpose: Müller cells create the external limiting membrane (ELM) by forming junctions with photoreceptor cells. This study evaluated the relationship between focal photoreceptors and RPE loss in geographic atrophy (GA) and Müller cell extension into the subretinal space. Methods: Human donor eyes with no retinal disease or geographic atrophy (GA) were fixed and the eye cups imaged. The retinal posterior pole was stained for glial fibrillary acidic protein (GFAP; astrocytes and activated Müller cells) and vimentin (Müller cells) while the submacular choroids were labeled with Ulex Europaeus Agglutinin lectin (blood vessels)...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28242129/low-grade-astrocytoma-causing-dural-and-calvarial-destruction
#16
Deyan D Handzhiev, Svetoslav K Kalevski, Stanislava V Handzhieva, Deyan L Dzhenkov, Suna Salieva-Badi
This case report describes destruction of overlying dura and calvaria by a low grade glioma in the absence of prior surgery or radiation. Bone and dural involving is known to occur with some malignant tumors, but due to low grade glioma is very rare. The initial radiologic examinations demonstrated a heterogeneous mass in the right parietal region with both extra- and intra-axial components. No inward displacement of the adjacent dura was observed. Initial consideration for extra-axial lesions includes metastatic lesions, lymphoma, or an aggressive meningioma...
February 24, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28240957/evaluation-of-gene-expression-and-dna-copy-number-profiles-of-adipose-tissue-derived-stromal-cells-and-consecutive-neurosphere-like-cells-generated-from-dogs-with-naturally-occurring-spinal-cord-injury
#17
Ji-Hey Lim, Sehwon Koh, Rachael Thomas, Matthew Breen, Natasha J Olby
OBJECTIVE To evaluate gene expression and DNA copy number in adipose tissue-derived stromal cells (ADSCs) and in ADSC-derived neurosphere-like cell clusters (ADSC-NSCs) generated from tissues of chronically paraplegic dogs. ANIMALS 14 client-owned paraplegic dogs. PROCEDURES Dorsal subcutaneous adipose tissue (< 1 cm(3)) was collected under general anesthesia; ADSCs were isolated and cultured. Third-passage ADSCs were cultured in neural cell induction medium to generate ADSC-NSCs. Relative gene expression of mesenchymal cell surface marker CD90 and neural progenitor marker nestin was assessed in ADSCs and ADSC-NSCs from 3 dogs by quantitative real-time PCR assay; expression of these and various neural lineage genes was evaluated for the same dogs by reverse transcription PCR assay...
March 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28238775/assessing-the-brain-through-the-eye-new-ways-to-explore-hepatic-encephalopathy
#18
Natalia Arias, Marta Méndez, Ignacio Alcalde, Almudena Íñigo-Portugués, Jesús Merayo-Lloves, Jaime Arias, Jorge L Arias
BACKGROUND & AIMS: Minimal hepatic encephalopathy (mHE) has been shown to affect daily functioning, quality of life, driving and overall mortality. However, little is known about treating or diagnosing early impairments in mHE. We studied one of its precipitating factors, portal hypertension which is driving the inflammatory process behind mHE. The purpose was to describe an indirect diagnostic method able to detect the pathology at early stages based on the study of the vascularization and mast cells conjunctival hyperplasia as secondary inflammatory response associated to portal hypertension...
February 24, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28237546/seasonal-variation-in-telencephalon-cell-proliferation-in-adult-female-tsinling-dwarf-skinks-scincella-tsinlingensis
#19
Chun Yang, Limin Wang, Xiangyang Xing, Yanyan Gao, Li Guo
In adult mammals, neurogenesis is limited to specific niches in the brain, but considerable adult neurogenesis occurs in many brain regions in non-mammalian vertebrates. Non-mammalian vertebrates provide invaluablecomparativematerial for understanding the core mechanisms ofadultneural stem cell maintenance and fate, but phylogenetic differences in adult neurogenesis remain poorly understood. Here we examine cell proliferation seasonality in the telencephalon of adult female tsinling dwarf skinks (Scincella tsinlingensis) by injecting wild animals caught in summer, autumn and spring, and animals caught in autumn and raised under winter conditions, with 5-Bromo-2'-deoxyuridine (BrdU)...
February 22, 2017: Brain Research
https://www.readbyqxmd.com/read/28236278/tat-mediated-induction-of-mirs-34a-138-promotes-astrocytic-activation-via-downregulation-of-sirt1-implications-for-aging-in-hand
#20
Guoku Hu, Ke Liao, Lu Yang, Gurudutt Pendyala, Yeonhee Kook, Howard S Fox, Shilpa Buch
Astrocyte activation is a hallmark of HIV infection and aging in the CNS. In chronically infected HIV patients, prolonged activation of astrocytes has been linked to accelerated aging including but not limited to neurocognitive impairment and frailty. The current study addresses the role of HIV protein Tat in inducing a set of small noncoding microRNAs (miRNA) that play critical role in astrogliosis. In our efforts to link astrocyte activation as an indicator of aging, we assessed the brains of both wild type and HIV transgenic rats for the expression of glial fibrillary acidic protein (GFAP)...
February 24, 2017: Journal of Neuroimmune Pharmacology: the Official Journal of the Society on NeuroImmune Pharmacology
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