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Restorative neurology

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https://www.readbyqxmd.com/read/29321376/retinal-de-novo-lipogenesis-coordinates-neurotrophic-signaling-to-maintain-vision
#1
Rithwick Rajagopal, Sheng Zhang, Xiaochao Wei, Teresa Doggett, Sangeeta Adak, Jennifer Enright, Vaishali Shah, Guoyu Ling, Shiming Chen, Jun Yoshino, Fong-Fu Hsu, Clay F Semenkovich
Membrane lipid composition is central to the highly specialized functions of neurological tissues. In the retina, abnormal lipid metabolism causes severe forms of blindness, often through poorly understood neuronal cell death. Here, we demonstrate that deleting the de novo lipogenic enzyme fatty acid synthase (FAS) from the neural retina, but not the vascular retina, results in progressive neurodegeneration and blindness with a temporal pattern resembling rodent models of retinitis pigmentosa. Blindness was not rescued by protection from light-evoked activity; by eating a diet enriched in palmitate, the product of the FAS reaction; or by treatment with the PPARα agonist fenofibrate...
January 11, 2018: JCI Insight
https://www.readbyqxmd.com/read/29321169/the-actin-mrtf-srf-transcriptional-circuit-controls-tubulin-acetylation-via-%C3%AE-tat1-gene-expression
#2
Jaime Fernández-Barrera, Miguel Bernabé-Rubio, Javier Casares-Arias, Laura Rangel, Laura Fernández-Martín, Isabel Correas, Miguel A Alonso
The role of formins in microtubules is not well understood. In this study, we have investigated the mechanism by which INF2, a formin mutated in degenerative renal and neurological hereditary disorders, controls microtubule acetylation. We found that silencing of INF2 in epithelial RPE-1 cells produced a dramatic drop in tubulin acetylation, increased the G-actin/F-actin ratio, and impaired myocardin-related transcription factor (MRTF)/serum response factor (SRF)-dependent transcription, which is known to be repressed by increased levels of G-actin...
January 10, 2018: Journal of Cell Biology
https://www.readbyqxmd.com/read/29321098/spondylodiscitis-diagnosis-and-treatment-options
#3
Christian Herren, Norma Jung, Miguel Pishnamaz, Marianne Breuninger, Jan Siewe, Rolf Sobottke
BACKGROUND: A recent population-based study from Denmark showed that the incidence of spondylodiscitis rose from 2.2 to 5.8 per 100 000 persons per year over the period 1995-2008; the age-standardized incidence in Germany has been estimated at 30 per 250 000 per year on the basis of data from the Federal Statistical Office (2015). The early diagnosis and treatment of this condition are essential to give the patient the best chance of a good outcome, but these are often delayed because it tends to present with nonspecific manifestations, and fever is often absent...
December 25, 2017: Deutsches Ärzteblatt International
https://www.readbyqxmd.com/read/29317311/concomitant-use-of-mesenchymal-stem-cells-and-neural-stem-cells-for-treatment-of-spinal-cord-injury-a-combo-cell-therapy-approach
#4
Seyed Mojtaba Hosseini, Mahsa Sani, Kh Husnanin Haider, Mohammadreza Dorvash, Seyyed Mohyeddin Ziaee, Aliasghar Karimi, Mohmmad Reza Namavar
with neural stem cells (NSCs) provides a hope to recover the neural damage and compensate for the lost neural structures for restoration of interrupted neural communications above and below the site of injury. However, cell-based therapy approach suffers from many biological barriers and technical caveats which severely hamper the prognosis. The biochemically-rich microenvironment at the site of spinal cord injury (SCI), the continuing neuro-degenerative process and infiltrating immune cells offer a serious barrier to the donor cells...
January 6, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29316653/synergistic-association-of-valproate-and-resveratrol-reduces-brain-injury-in-ischemic-stroke
#5
Lara Faggi, Giuseppe Pignataro, Edoardo Parrella, Vanessa Porrini, Antonio Vinciguerra, Pasquale Cepparulo, Ornella Cuomo, Annamaria Lanzillotta, Mariana Mota, Marina Benarese, Paolo Tonin, Lucio Annunziato, PierFranco Spano, Marina Pizzi
Histone deacetylation, together with altered acetylation of NF-κB/RelA, encompassing the K310 residue acetylation, occur during brain ischemia. By restoring the normal acetylation condition, we previously reported that sub-threshold doses of resveratrol and entinostat (MS-275), respectively, an activator of the AMP-activated kinase (AMPK)-sirtuin 1 pathway and an inhibitor of class I histone deacetylases (HDACs), synergistically elicited neuroprotection in a mouse model of ischemic stroke. To improve the translational power of this approach, we investigated the efficacy of MS-275 replacement with valproate, the antiepileptic drug also reported to be a class I HDAC blocker...
January 6, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29315121/cervical-total-disk-arthroplasty
#6
Timothy T Roberts, Ryan J Filler, Jason W Savage, Edward C Benzel
In the United States, cervical total disk arthroplasty (TDA) is US Federal Drug Administration (FDA) approved for use in both 1 and 2-level constructions for cervical disk disease resulting in myelopathy and/or radiculopathy. TDA designs vary in form, function, material composition, and even performance in vivo. However, the therapeutic goals are the same: to remove the painful degenerative/damaged elements of the intervertebral discoligamenous joint complex, to preserve or restore the natural range of spinal motion, and to mitigate stresses on adjacent spinal segments, thereby theoretically limiting adjacent segment disease (ASDis)...
January 8, 2018: Clinical Spine Surgery
https://www.readbyqxmd.com/read/29311593/neogenin-a-regulator-of-adult-hippocampal-neurogenesis-prevents-depressive-like-behavior
#7
Dong Sun, Xiang-Dong Sun, Lu Zhao, Dae-Hoon Lee, Jin-Xia Hu, Fu-Lei Tang, Jin-Xiu Pan, Lin Mei, Xiao-Juan Zhu, Wen-Cheng Xiong
Adult neurogenesis in hippocampal dentate gyrus (DG) is a complex, but precisely controlled process. Dysregulation of this event contributes to multiple neurological disorders, including major depression. Thus, it is of considerable interest to investigate how adult hippocampal neurogenesis is regulated. Here, we present evidence for neogenin, a multifunctional transmembrane receptor, to regulate adult mouse hippocampal neurogenesis. Loss of neogenin in adult neural stem cells (NSCs) or neural progenitor cells (NPCs) impaired NSCs/NPCs proliferation and neurogenesis, whereas increased their astrocytic differentiation...
January 8, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29311559/injured-adult-motor-and-sensory-axons-regenerate-into-appropriate-organotypic-domains-of-neural-progenitor-grafts
#8
Jennifer N Dulin, Andrew F Adler, Hiromi Kumamaru, Gunnar H D Poplawski, Corinne Lee-Kubli, Hans Strobl, Daniel Gibbs, Ken Kadoya, James W Fawcett, Paul Lu, Mark H Tuszynski
Neural progenitor cell (NPC) transplantation has high therapeutic potential in neurological disorders. Functional restoration may depend on the formation of reciprocal connections between host and graft. While it has been reported that axons extending out of neural grafts in the brain form contacts onto phenotypically appropriate host target regions, it is not known whether adult, injured host axons regenerating into NPC grafts also form appropriate connections. We report that spinal cord NPCs grafted into the injured adult rat spinal cord self-assemble organotypic, dorsal horn-like domains...
January 8, 2018: Nature Communications
https://www.readbyqxmd.com/read/29306595/hyperglycemia-alters-expression-of-cerebral-metabolic-genes-after-cardiac-arrest
#9
Rickard Per Fredrik Lindblom, Maria Molnar, Charlotte Israelsson, Belinda Röjsäter, Lars Wiklund, Fredrik Lennmyr
BACKGROUND: Survivors of cardiac arrest often experience neurologic deficits. To date, treatment options are limited. Associated hyperglycemia is believed to further worsen the neurologic outcome. The aim with this study was to characterize expression pathways induced by hyperglycemia in conjunction with global brain ischemia. METHODS: Pigs were randomized to high or normal glucose levels, as regulated by glucose and insulin infusions with target levels of 8.5-10 mM and 4-5...
January 3, 2018: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29291404/ulinastatin-protects-brain-against-cerebral-ischemia-reperfusion-injury-through-inhibiting-mmp-9-and-alleviating-loss-of-zo-1-and-occludin-proteins-in-mice
#10
Xiao-Fang Li, Xiang-Jian Zhang, Cong Zhang, Li-Na Wang, Yao-Ru Li, Ye Zhang, Ting-Ting He, Xing-Yuan Zhu, Li-Li Cui, Bu-Lang Gao
BACKGROUND: The effects of Ulinastatin (UTI) on the blood-brain barrier (BBB) in the acute phase of cerebral ischemia/reperfusion (I/R) are not clear. This study was to investigate the potential protective effects of UTI on the BBB and the underlying mechanisms. METHODS: Male CD-1 mice were subjected to transient middle cerebral artery occlusion (tMCAO) and randomly assigned to four groups: Sham (sham-operated), tMCAO (tMCAO+0.9% saline), UTI-L (tMCAO+UTI 1500U/100g) and UTI-H (tMCAO+UTI 3000U/100g) group...
December 29, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/29289669/ambulation-and-survival-following-surgery-in-elderly-patients-with-metastatic-epidural-spinal-cord-compression
#11
Eyal Itshayek, Carlos Candanedo, Shifra Fraifeld, Amir Hasharoni, Leon Kaplan, Josh E Schroeder, José E Cohen
BACKGROUND & CONTEXT: Metastatic epidural spinal cord compression (MESCC) is a disabling consequence of disease progression. Surgery can restore/preserve physical function, improving access to treatments that increase duration of survival; however, advanced patient age may deter oncologists and surgeons from considering surgical management. PURPOSE: Evaluate the duration of ambulation and survival in elderly patients following surgical decompression of MESCC. STUDY DESIGN/SETTING: Retrospective file review of a prospective database, under IRB waiver of informed consent, of consecutive patients treated in an academic tertiary care medical center from 8/2008-3/2015...
December 28, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29289661/notch-signaling-is-impaired-during-inflammation-in-a-lunatic-fringe-dependent-manner
#12
Claudio Derada Troletti, Melissa A Lopes Pinheiro, Marc Charabati, Elizabeth Gowing, Bert van Het Hof, Susanne M A van der Pol, Dirk Geerts, Alexandre Prat, Ruud D Fontijn, Wendy W Unger, Helga E de Vries
The blood-brain barrier (BBB) assures brain homeostasis through the specialized function of brain endothelial cells (BECs). Dysfunction of the BBB due to inflammatory processes is associated with several neurological disorders, including multiple sclerosis (MS). Understanding the mechanisms that underlie these processes may ultimately lead to new therapeutic strategies to restore BBB function, thereby fighting disease progression. In this study, we demonstrate for the first time a critical role of the Notch signaling pathway in the function of the BBB under resting and inflammatory conditions...
December 28, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29288802/increasing-extracellular-cgmp-in-cerebellum-in-vivo-reduces-neuroinflammation-gabaergic-tone-and-motor-in-coordination-in-hyperammonemic-rats
#13
Andrea Cabrera-Pastor, Tiziano Balzano, Vicente Hernández-Rabaza, Michele Malaguarnera, Marta Llansola, Vicente Felipo
Hyperammonemia is a main contributor to cognitive impairment and motor in-coordination in patients with hepatic encephalopathy. Hyperammonemia-induced neuroinflammation mediates the neurological alterations in hepatic encephalopathy. Intracerebral administration of extracellular cGMP restores some but not all types of cognitive impairment. Motor in-coordination, is mainly due to increased GABAergic tone in cerebellum. We hypothesized that extracellular cGMP would restore motor coordination in hyperammonemic rats by normalizing GABAergic tone in cerebellum and that this would be mediated by reduction of neuroinflammation...
December 27, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29287823/posterior-only-vertebral-column-resection-for-fused-spondyloptosis
#14
Jeffrey L Gum, Lawrence G Lenke, Anand Mohapatra, Sam Q Sun, Michael P Kelly
STUDY DESIGN: Retrospective review. OBJECTIVES: To describe 3 cases of a posterior-only vertebral column resection (pVCR) for the treatment of spondyloptosis in the setting of prior spinal fusions. SUMMARY OF BACKGROUND DATA: Lumbosacral spondyloptosis is a rare spinal deformity with a number of surgical options, none of which demonstrate clear superiority. The use of an L5 vertebral column resection, via combined anterior and posterior approaches, to restore lumbosacral alignment has been described though is accompanied by high rates of neurological deficit...
January 2018: Spine Deformity
https://www.readbyqxmd.com/read/29287687/an-overview-of-the-possible-therapeutic-role-of-sumoylation-in-the-treatment-of-alzheimer-s-disease
#15
REVIEW
S Marcelli, E Ficulle, L Piccolo, M Corbo, M Feligioni
Nowadays, Alzheimer's disease (AD) is recognized as a multifactorial neurological pathology whose complexity is the cause of our still low achievements in the understanding of the associated mechanisms as well the discovery of a possible definitive cure. Clinicians are aware of the few possibilities offered by medicine to cure Alzheimer's patients, restore their memory and take them back to normal life. Unfortunately, the therapeutic tools available today are not able to contrast the pathology. In the last years the tendency of the research is to formulate new hypotheses that can help to develop future effective drugs...
December 26, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29286458/surgical-training-for-the-implantation-of-neocortical-microelectrode-arrays-using-a-formaldehyde-fixed-human-cadaver-model
#16
Pierre Mégevand, Alain Woodtli, Aude Yulzari, G Rees Cosgrove, Shahan Momjian, Bojan V Stimec, Marco V Corniola, Jean H D Fasel
This protocol describes a procedure to assist surgeons in training for the implantation of microelectrode arrays into the neocortex of the human brain. Recent technological progress has enabled the fabrication of microelectrode arrays that allow recording the activity of multiple individual neurons in the neocortex of the human brain. These arrays have the potential to bring unique insight onto the neuronal correlates of cerebral function in health and disease. Furthermore, the identification and decoding of volitional neuronal activity opens the possibility to establish brain-computer interfaces, and thus might help restore lost neurological functions...
November 19, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29285560/anterior-controllable-antidisplacement-and-fusion-surgery-for-the-treatment-of-multilevel-severe-ossification-of-the-posterior-longitudinal-ligament-with-myelopathy-preliminary-clinical-results-of-a-novel-technique
#17
Jingchuan Sun, Jiangang Shi, Ximing Xu, Yong Yang, Yuan Wang, Qingjie Kong, Haisong Yang, Yongfei Guo, Dan Han, Jingjing Jiang, Guodong Shi, Wen Yuan, Lianshun Jia
PURPOSE: Although anterior and posterior decompression surgery are both reported to treat patients with myelopathy caused by ossification of the posterior longitudinal ligament (OPLL). The surgical strategy of the disease is still controversial when the OPLL is multilevel and severe. This present study reports the preliminary clinical results of a novel technique named anterior controllable antidisplacement and fusion (ACAF) for the treatment of multilevel-severe OPLL with myelopathy...
December 28, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29284109/morin-hydrate-mitigates-rapid-eye-movement-sleep-deprivation-induced-neurobehavioural-impairments-and-loss-of-viable-neurons-in-the-hippocampus-of-mice
#18
Elizabeth T Olonode, Adegbuyi O Aderibigbe, Olusegun A Adeoluwa, Anthony T Eduviere, Benneth Ben-Azu
Rapid eye movement sleep deprivation distorts the body's homeostasis and results in oxidative breakdown which may be responsible for a variety of neurological disorders. Some naturally occurring compounds of plant origin with antioxidant and neuroprotective properties are known to attenuate the detrimental effects of REM sleep deprivation. Morin hydrate, a flavonoid from Mulberry has demonstrated antioxidant and neuroprotective activities but its effect in sleep disturbed mice is unknown. The study was designed to explore the neuroprotective effect of Morin hydrate on 48 hr...
December 25, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/29283290/real-time-quantitative-monitoring-of-cerebral-blood-flow-by-laser-speckle-contrast-imaging-after-cardiac-arrest-with-targeted-temperature-management
#19
Junyun He, Hongyang Lu, Leanne Young, Ruoxian Deng, Daniel Callow, Shanbao Tong, Xiaofeng Jia
Brain injury is the main cause of mortality and morbidity after cardiac arrest (CA). Changes in cerebral blood flow (CBF) after reperfusion are associated with brain injury and recovery. To characterize the relative CBF (rCBF) after CA, 14 rats underwent 7 min asphyxia-CA and were randomly treated with 6 h post-resuscitation normothermic (36.5-37.5℃) or hypothermic- (3-234℃) targeted temperature management (TTM) (N = 7). rCBF was monitored by a laser speckle contrast imaging (LSCI) technique. Brain recovery was evaluated by neurologic deficit score (NDS) and quantitative EEG - information quantity (qEEG-IQ)...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29279755/delayed-neurological-deficits-after-osteoporotic-vertebral-fractures-clinical-outcomes-after-surgery
#20
Yip-Kan Yeung, Sheung-Tung Ho
Study Design: Retrospective cohort. Purpose: To review the clinical presentation of operated patients with delayed neurological deficits after osteoporotic vertebral fractures (OVFs). Overview of Literature: Delayed neurological deficits can occur from 1 week to 5.7 months after OVFs. Baba has reported 78% good-to-excellent improvement (i.e., ≥50%) after 20 posterior (Cotrel-Dubousset) and 7 anterior (Kaneda in 4, Zielke ventral derotational spondylodesis in 2, and un-instrumented anterior fusion in 1) fusions...
December 2017: Asian Spine Journal
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