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Neuroregeneration

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https://www.readbyqxmd.com/read/29665726/dexmedetomidine-mitigates-microglia-mediated-neuroinflammation-through-up-regulation-of-programmed-cell-death-protein-1-in-a-rat-spinal-cord-injury-model
#1
Hefan He, Yingying Zhou, Yilin Zhou, Jiayuan Zhuang, Xu He, Siyuan Wang, Wenping Lin
Excessive neuroinflammation aggravates neurological damage after spinal cord injury (SCI). Controlling neuroinflammation might favor neuroregeneration and tissue repair. Dexmedetomidine is reported to inhibit post-SCI neuroinflammation in previous research. In the current study, to determine the mechanisms by which dexmedetomidine inhibits neuroinflammation, we tested the effect of dexmedetomidine hydrochloride on microglia in vitro and in a rat SCI model. We found that dexmedetomidine hydrochloride up-regulated programmed cell death protein 1 (PD-1), an immunoregulatory molecule, in activated microglia but not in resting microglia...
April 18, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29627520/promoting-neuroregeneration-by-applying-dynamic-magnetic-fields-to-a-novel-nanomedicine-superparamagnetic-iron-oxide-spio-gold-nanoparticles-bounded-with-nerve-growth-factor-ngf
#2
Muzhaozi Yuan, Ya Wang, Yi-Xian Qin
Neuroregeneration imposes a significant challenge in neuroscience for treating neurodegenerative diseases. The objective of this study is to evaluate the hypothesis that the nerve growth factor (NGF) functionalized superparamagnetic iron oxide (SPIO)-gold (Au) nanomedicine can stimulate the neuron growth and differentiation under external magnetic fields (MFs), and dynamic MFs outperform their static counterparts. The SPIO-Au core-shell nanoparticles (NPs) (Diameter: 20.8 nm) possessed advantages such as uniform quasi-spherical shapes, narrow size distribution, excellent stabilities, and low toxicity (viability >96% for 5-day)...
April 5, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29623913/snare-complex-in-axonal-guidance-and-neuroregeneration
#3
REVIEW
Fausto Ulloa, Tiziana Cotrufo, Delia Ricolo, Eduardo Soriano, Sofia J Araújo
Through complex mechanisms that guide axons to the appropriate routes towards their targets, axonal growth and guidance lead to neuronal system formation. These mechanisms establish the synaptic circuitry necessary for the optimal performance of the nervous system in all organisms. Damage to these networks can be repaired by neuroregenerative processes which in turn can re-establish synapses between injured axons and postsynaptic terminals. Both axonal growth and guidance and the neuroregenerative response rely on correct axonal growth and growth cone responses to guidance cues as well as correct synapses with appropriate targets...
March 2018: Neural Regeneration Research
https://www.readbyqxmd.com/read/29623912/cerebral-ischemia-and-neuroregeneration
#4
REVIEW
Reggie H C Lee, Michelle H H Lee, Celeste Y C Wu, Alexandre Couto E Silva, Harlee E Possoit, Tsung-Han Hsieh, Alireza Minagar, Hung Wen Lin
Cerebral ischemia is one of the leading causes of morbidity and mortality worldwide. Although stroke (a form of cerebral ischemia)-related costs are expected to reach 240.67 billion dollars by 2030, options for treatment against cerebral ischemia/stroke are limited. All therapies except anti-thrombolytics (i.e., tissue plasminogen activator) and hypothermia have failed to reduce neuronal injury, neurological deficits, and mortality rates following cerebral ischemia, which suggests that development of novel therapies against stroke/cerebral ischemia are urgently needed...
March 2018: Neural Regeneration Research
https://www.readbyqxmd.com/read/29621597/mesenchymal-stem-cells-encapsulated-into-biomimetic-hydrogel-scaffold-gradually-release-ccl2-chemokine-in-situ-preserving-cytoarchitecture-and-promoting-functional-recovery-in-spinal-cord-injury
#5
S Papa, I Vismara, A Mariani, M Barilani, S Rimondo, M De Paola, N Panini, E Erba, E Mauri, F Rossi, G Forloni, L Lazzari, P Veglianese
Spinal cord injury (SCI) is an acute neurodegenerative disorder caused by traumatic damage of the spinal cord. The neuropathological evolution of the primary trauma involves multifactorial processes that exacerbate the pathology, worsening the neurodegeneration and limiting neuroregeneration. This complexity suggests that multi-therapeutic approaches, rather than any single treatment, might be more effective. Encouraging preclinical results indicate that stem cell-based treatments may improve the disease outcome due to their multi-therapeutic ability...
April 2, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29562785/extracellular-vesicles-derived-from-wharton-s-jelly-mesenchymal-stem-cells-prevent-and-resolve-programmed-cell-death-mediated-by-perinatal-hypoxia-ischemia-in-neuronal-cells
#6
Marianne S Joerger-Messerli, Byron Oppliger, Marialuigia Spinelli, Gierin Thomi, Ivana di Salvo, Philipp Schneider, Andreina Schoeberlein
Hypoxic-ischemic (HI) insult in the perinatal phase harbors a high risk of encephalopathy in the neonate. Brain cells undergo apoptosis, initiating neurodegeneration. So far, therapeutic approaches such as cooling remain limited. Transplantation of mesenchymal stem cells (MSCs) exhibits therapeutic success despite the short-time survival in the host brain, providing strong evidence that their beneficial effects are largely based on secreted factors, including extracellular vesicles (EVs). The aim of this study was to investigate the effects of human Wharton's jelly MSC (hWJ-MSC)-derived EVs on neuroprotection and neuroregeneration, using an in vitro model of oxygen-glucose deprivation/reoxygenation (OGD/R) mimicking HI injury in the mouse neuroblastoma cell line neuro2a (N2a)...
January 2018: Cell Transplantation
https://www.readbyqxmd.com/read/29543759/localized-intrathecal-delivery-of-mesenchymal-stromal-cells-conditioned-medium-improves-functional-recovery-in-a-rat-model-of-spinal-cord-injury
#7
Dasa Cizkova, Veronika Cubinkova, Tomas Smolek, Adriana-Natalia Murgoci, Jan Danko, Katarina Vdoviakova, Filip Humenik, Milan Cizek, Jusal Quanico, Isabelle Fournier, Michel Salzet
It was recently shown that the conditioned medium (CM) of mesenchymal stem cells can enhance viability of neural and glial cell populations. In the present study, we have investigated a cell-free approach via CM from rat bone marrow stromal cells (MScCM) applied intrathecally (IT) for spinal cord injury (SCI) recovery in adult rats. Functional in vitro test on dorsal root ganglion (DRG) primary cultures confirmed biological properties of collected MScCM for production of neurosphere-like structures and axon outgrowth...
March 15, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29504228/molecular-profiling-of-aged-neural-progenitors-identifies-dbx2-as-a-candidate-regulator-of-age-associated-neurogenic-decline
#8
Giuseppe Lupo, Paola S Nisi, Pilar Esteve, Yu-Lee Paul, Clara Lopes Novo, Ben Sidders, Muhammad A Khan, Stefano Biagioni, Hai-Kun Liu, Paola Bovolenta, Emanuele Cacci, Peter J Rugg-Gunn
Adult neurogenesis declines with aging due to the depletion and functional impairment of neural stem/progenitor cells (NSPCs). An improved understanding of the underlying mechanisms that drive age-associated neurogenic deficiency could lead to the development of strategies to alleviate cognitive impairment and facilitate neuroregeneration. An essential step towards this aim is to investigate the molecular changes that occur in NSPC aging on a genomewide scale. In this study, we compare the transcriptional, histone methylation and DNA methylation signatures of NSPCs derived from the subventricular zone (SVZ) of young adult (3 months old) and aged (18 months old) mice...
March 5, 2018: Aging Cell
https://www.readbyqxmd.com/read/29497572/engraftment-neuroglial-transdifferentiation-and-behavioral-recovery-after-complete-spinal-cord-transection-in-rats
#9
Luzzi Sabino, Crovace Alberto Maria, Lacitignola Luca, Valentini Valerio, Francioso Edda, Rossi Giacomo, Invernici Gloria, Galzio Renato Juan, Crovace Antonio
Background: Proof of the efficacy and safety of a xenogeneic mesenchymal stem cell (MSCs) transplant for spinal cord injury (SCI) may theoretically widen the spectrum of possible grafts for neuroregeneration. Methods: Twenty rats were submitted to complete spinal cord transection. Ovine bone marrow MSCs, retrovirally transfected with red fluorescent protein and not previously induced for neuroglial differentiation, were applied in 10 study rats (MSCG). Fibrin glue was injected in 10 control rats (FGG)...
2018: Surgical Neurology International
https://www.readbyqxmd.com/read/29425719/cell-reprogramming-by-3d-bioprinting-of-human-fibroblasts-in-polyurethane-hydrogel-for-fabrication-of-neural-like-constructs
#10
Lin Ho, Shan-Hui Hsu
3D bioprinting is a technique which enables the direct printing of biodegradable materials with cells into 3D tissue. So far there is no cell reprogramming in situ performed with the 3D bioprinting process. Forkhead box D3 (FoxD3) is a transcription factor and neural crest marker, which was reported to reprogram human fibroblasts into neural crest stem-like cells. In this study, we synthesized a new biodegradable thermo-responsive waterborne polyurethane (PU) gel as a bioink. FoxD3 plasmids and human fibroblasts were co-extruded with the PU hydrogel through the syringe needle tip for cell reprogramming...
February 6, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29372464/the-potential-of-stem-cells-in-treatment-of-traumatic-brain-injury
#11
REVIEW
Nicole M Weston, Dong Sun
PURPOSE OF REVIEW: Traumatic brain injury (TBI) is a global public health concern, with limited treatment options available. Despite improving survival rate after TBI, treatment is lacking for brain functional recovery and structural repair in clinic. Recent studies have suggested that the mature brain harbors neural stem cells which have regenerative capacity following brain insults. Much progress has been made in preclinical TBI model studies in understanding the behaviors, functions, and regulatory mechanisms of neural stem cells in the injured brain...
January 25, 2018: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/29364269/three-dimensional-tissue-engineered-aligned-astrocyte-networks-to-recapitulate-developmental-mechanisms-and-facilitate-nervous-system-regeneration
#12
Kritika S Katiyar, Carla C Winter, Wisberty J Gordián-Vélez, John C O'Donnell, Yeri J Song, Nicole S Hernandez, Laura A Struzyna, D Kacy Cullen
Neurotrauma and neurodegenerative disease often result in lasting neurological deficits due to the limited capacity of the central nervous system (CNS) to replace lost neurons and regenerate axonal pathways. However, during nervous system development, neuronal migration and axonal extension often occur along pathways formed by other cells, referred to as "living scaffolds". Seeking to emulate these mechanisms and to design a strategy that circumvents the inhibitory environment of the CNS, this manuscript presents a protocol to fabricate tissue engineered astrocyte-based "living scaffolds"...
January 10, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29353456/in-vivo-transient-and-partial-cell-reprogramming-to-pluripotency-as-a-therapeutic-tool-for-neurodegenerative-diseases
#13
REVIEW
S Tamanini, G P Comi, S Corti
In theory, human diseases in which a specific cell type degenerates, such as neurodegenerative diseases, can be therapeutically addressed by replacement of the lost cells. The classical strategy for cell replacement is exogenous cell transplantation, but now, cell replacement can also be achieved with in situ reprogramming. Indeed, many of these disorders are age-dependent, and "rejuvenating" strategies based on cell epigenetic modifications are a possible approach to counteract disease progression...
January 20, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29330870/cell-therapy-for-spinal-cord-injury-with-olfactory-ensheathing-glia-cells-oecs
#14
REVIEW
Rosa M Gómez, Magdy Y Sánchez, Maria Portela-Lomba, Kemel Ghotme, George E Barreto, Javier Sierra, M Teresa Moreno-Flores
The prospects of achieving regeneration in the central nervous system (CNS) have changed, as most recent findings indicate that several species, including humans, can produce neurons in adulthood. Studies targeting this property may be considered as potential therapeutic strategies to respond to injury or the effects of demyelinating diseases in the CNS. While CNS trauma may interrupt the axonal tracts that connect neurons with their targets, some neurons remain alive, as seen in optic nerve and spinal cord (SC) injuries (SCIs)...
January 13, 2018: Glia
https://www.readbyqxmd.com/read/29302617/genetic-pathways-of-neuroregeneration-in-a-novel-mild-traumatic-brain-injury-model-in-adult-zebrafish
#15
Amanda L Maheras, Brian Dix, Olivia M S Carmo, Aleena E Young, Vanessa N Gill, Julia L Sun, Aleah R Booker, Helen A Thomason, Anastasia E Ibrahim, Lauren Stanislaw, Jennifer C Dallego, Cat N Ngo, Audrey Chen, Barbara K Fortini, Rory D Spence
Mild traumatic brain injuries (mTBIs) are one of the most prevalent neurological disorders, and humans are severely limited in their ability to repair and regenerate central nervous system (CNS) tissue postinjury. However, zebrafish ( Danio rerio ) maintain the remarkable ability to undergo complete and functional neuroregeneration as an adult. We wish to extend knowledge of the known mechanisms of neuroregeneration by analyzing the differentially expressed genes (DEGs) in a novel adult zebrafish model of mTBI...
January 2018: ENeuro
https://www.readbyqxmd.com/read/29285620/effect-of-the-combined-treatment-of-albumin-with-plasma-synthesised-pyrrole-polymers-on-motor-recovery-after-traumatic-spinal-cord-injury-in-rats
#16
Omar Fabela-Sánchez, Hermelinda Salgado-Ceballos, Luis Medina-Torres, Laura Álvarez-Mejía, Stephany Sánchez-Torres, Rodrigo Mondragón-Lozano, Axayácatl Morales-Guadarrama, Araceli Díaz-Ruiz, María-Guadalupe Olayo, Guillermo J Cruz, Juan Morales, Camilo Ríos, Roberto Olayo
Traumatic spinal cord injury (TSCI) is a health problem for which there is currently no treatment or definitive therapy. Medicine has explored therapeutic options for patients with TSCI with the aim to improve their quality of life. One alternative has been the development of biomaterials that offer neuroprotection or neuroregeneration of damaged nerve tissue. The microinjection of iodine-doped polypyrrole particles synthesised by plasma (PPPy/I) has shown neuroprotective effects that favour motor function recovery in experimental animals with TSCI...
December 28, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/29244816/treatment-with-albumin-hydroxyoleic-acid-complex-restores-sensorimotor-function-in-rats-with-spinal-cord-injury-efficacy-and-gene-expression-regulation
#17
Gerardo Avila-Martin, Manuel Mata-Roig, Iriana Galán-Arriero, Julian S Taylor, Xavier Busquets, Pablo V Escribá
Sensorimotor dysfunction following incomplete spinal cord injury (SCI) is often characterized by paralysis, spasticity and pain. Previously, we showed that intrathecal (i.t.) administration of the albumin-oleic acid (A-OA) complex in rats with SCI produced partial improvement of these symptoms and that oral 2-hydroxyoleic acid (HOA, a non-hydrolyzable OA analogue), was efficacious in the modulation and treatment of nociception and pain-related anxiety, respectively. Here we observed that intrathecal treatment with the complex albumin-HOA (A-HOA) every 3 days following T9 spinal contusion injury improved locomotor function assessed with the Rotarod and inhibited TA noxious reflex activity in Wistar rats...
2017: PloS One
https://www.readbyqxmd.com/read/29239336/neural-progenitor-cells-but-not-astrocytes-respond-distally-to-thoracic-spinal-cord-injury-in-rat-models
#18
Tara Nguyen, Yilin Mao, Theresa Sutherland, Catherine Anne Gorrie
Traumatic spinal cord injury (SCI) is a detrimental condition that causes loss of sensory and motor function in an individual. Many complex secondary injury cascades occur after SCI and they offer great potential for therapeutic targeting. In this study, we investigated the response of endogenous neural progenitor cells, astrocytes, and microglia to a localized thoracic SCI throughout the neuroaxis. Twenty-five adult female Sprague-Dawley rats underwent mild-contusion thoracic SCI (n = 9), sham surgery (n = 8), or no surgery (n = 8)...
November 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/29188434/photothrombotic-stroke-as-a-model-of-ischemic-stroke
#19
REVIEW
Anatoly B Uzdensky
The search of effective anti-stroke neuroprotectors requires various stroke models adequate for different aspects of the ischemic processes. The photothrombotic stroke model is particularly suitable for the study of cellular and molecular mechanisms underlying neurodegeneration, neuroprotection, and neuroregeneration. It is a model of occlusion of small cerebral vessels, which provides detailed study of molecular mechanisms of ischemic cell death and useful for search of potential anti-stroke agents. Its advantages include well-defined location and size of ischemic lesion that are determined by the aiming of the laser beam at the predetermined brain region; easy impact dosing by changing light intensity and duration; low invasiveness and minimal surgical intervention without craniotomy and mechanical manipulations with blood vessel, which carry the risk of brain trauma; low animal mortality and prolonged sensorimotor impairment that provide long-term study of stroke consequences including behavior impairment and recovery; independence on genetic variations of blood pressure and vascular architecture; and high reproducibility...
November 29, 2017: Translational Stroke Research
https://www.readbyqxmd.com/read/29176876/neuroprotection-and-neuroregeneration-of-retinal-ganglion-cells-after-intravitreal-carbon-monoxide-release
#20
Julia Stifter, Felix Ulbrich, Ulrich Goebel, Daniel Böhringer, Wolf Alexander Lagrèze, Julia Biermann
PURPOSE: Retinal ischemia induces apoptosis leading to neurodegeneration and vision impairment. Carbon monoxide (CO) in gaseous form showed cell-protective and anti-inflammatory effects after retinal ischemia-reperfusion-injury (IRI). These effects were also demonstrated for the intravenously administered CO-releasing molecule (CORM) ALF-186. This article summarizes the results of intravitreally released CO to assess its suitability as a neuroprotective and neuroregenerative agent. METHODS: Water-soluble CORM ALF-186 (25 μg), PBS, or inactivated ALF (iALF) (all 5 μl) were intravitreally applied into the left eyes of rats directly after retinal IRI for 1 h...
2017: PloS One
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