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https://www.readbyqxmd.com/read/27920202/the-translational-significance-of-the-neurovascular-unit-a-mini-review
#1
Heather L McConnell, Cymon N Kersch, Randall L Woltjer, Edward A Neuwelt
The mammalian brain is supplied with blood by specialized vasculature that is structurally and functionally distinct from that of the periphery. A defining feature of this vasculature is a physical blood-brain barrier (BBB). The BBB separates blood components from the brain microenvironment, regulating the entry and exit of ions, nutrients, macromolecules, and energy metabolites. Over the last two decades, physiological studies of cerebral blood flow dynamics have demonstrated that substantial intercellular communication occurs between cells of the vasculature and the neurons and glia that abut the vasculature...
December 5, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27918464/checkpoints-to-the-brain-directing-myeloid-cell-migration-to-the-central-nervous-system
#2
REVIEW
Meredith Harrison-Brown, Guo-Jun Liu, Richard Banati
Myeloid cells are a unique subset of leukocytes with a diverse array of functions within the central nervous system during health and disease. Advances in understanding of the unique properties of these cells have inspired interest in their use as delivery vehicles for therapeutic genes, proteins, and drugs, or as "assistants" in the clean-up of aggregated proteins and other molecules when existing drainage systems are no longer adequate. The trafficking of myeloid cells from the periphery to the central nervous system is subject to complex cellular and molecular controls with several 'checkpoints' from the blood to their destination in the brain parenchyma...
December 2, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27889093/removal-of-a-contraceptive-implant-from-the-brachial-neurovascular-sheath
#3
Christopher Belyea, Justin Ernat, Rey Gumboc
Subdermal implantable devices are commonly used for long-acting contraception in the United States and Europe. Although relatively safe in nature, their implantation and removal may be associated with potential complications, some of which may require surgical intervention. Complications may include infection, incorrect implantation, migration, or difficulty with removal. Proximal migration has been reported; however, there are no reports of devices that have migrated within the brachial neurovascular sheath...
November 23, 2016: Journal of Hand Surgery
https://www.readbyqxmd.com/read/27876573/stem-cell-therapies-in-age-related-neurodegenerative-diseases-and-stroke
#4
REVIEW
Yuan Wang, Xunming Ji, Rehana K Leak, Fenghua Chen, Guodong Cao
Aging, a complex process associated with various structural, functional and metabolic changes in the brain, is an important risk factor for neurodegenerative diseases and stroke. These diseases share similar neuropathological changes, such as the formation of misfolded proteins, oxidative stress, loss of neurons and synapses, dysfunction of the neurovascular unit (NVU), reduction of self-repair capacity, and motor and/or cognitive deficiencies. In addition to gray matter dysfunction, the plasticity and repair capacity of white matter also decrease with aging and contribute to neurodegenerative diseases...
November 19, 2016: Ageing Research Reviews
https://www.readbyqxmd.com/read/27876499/prolonged-hydrocephalus-induced-by-intraventricular-hemorrhage-in-rats-is-reduced-by-curcumin-therapy
#5
Zhihua Qi, Huiqin Zhang, Chuhua Fu, Xiao Liu, Bo Chen, Yanwei Dang, Huayun Chen, Lijun Liu
Prolonged hydrocephalus is a major cause of severe disability and death of intraventricular hemorrhage (IVH) patients. However, the therapeutic options to minimize the detrimental effects of post-hemorrhagic hydrocephalus are limited. Curcumin has been reported to confer neuroprotective effects in numerous neurological diseases and injuries, but its role in IVH-induced hydrocephalus has not been determined. The aim of present study was to determine whether curcumin treatment ameliorates blood brain barrier (BBB) damage and reduces the incidence of post-hemorrhagic hydrocephalus in IVH rat model...
November 20, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27866732/impact-of-a-direct-admission-stroke-pathway-on-delays-of-admission-care-and-rates-of-intravenous-thrombolysis
#6
REVIEW
C Mouthon-Reignier, I Bonnaud, M Gaudron, S Vannier-Bernard, J-F Bodin, J-P Cottier, B De Toffol, S Debiais
INTRODUCTION: This study examined the impact of a "direct potential thrombolysis" pathway with direct admission to a neurological stroke unit (SU) on delays of admission, stroke care and proportion of patients with ischemic stroke (IS) treated with intravenous (IV) rtPA. METHODS: This prospective study included all patients admitted in the intensive SU for potential thrombolysis over a 2-month period. Data collected included the time of symptom onset, mode of transport, National Institutes of Health Stroke Scale (NIHSS) score on arrival, delays of care, delays of imaging and modalities, diagnosis and therapeutic data...
December 2016: Revue Neurologique
https://www.readbyqxmd.com/read/27864848/age-related-small-vessel-disease-a-potential-contributor-to-neurodegeneration-in-multiple-sclerosis
#7
REVIEW
Ruth Geraldes, Margaret M Esiri, Gabriele C DeLuca, Jacqueline Palace
Multiple sclerosis (MS) is a chronic inflammatory demyelinating disorder of the central nervous system wherein, after an initial phase of transient neurological defects, slow neurological deterioration due to progressive neuronal loss ensues. Age is a major determinant of MS progression onset and disability. Over the past years, several mechanisms have been proposed to explain the key drivers of neurodegeneration and disability accumulation in MS. However, the effect of commonly encountered age-related cerebral vessel disease, namely small vessel disease (SVD), has been largely neglected and constitutes the aim of this review...
November 19, 2016: Brain Pathology
https://www.readbyqxmd.com/read/27857808/nervous-system-involvement-in-clinical-peripheral-inflammation-a-description-of-three-pediatric-cases
#8
Giovanna Vitaliti, Omidreza Tabatabaie, Nassim Matin, Giovanni Roberto Giugno, Piero Pavone, Riccardo Lubrano, Raffaele Falsaperla
Latest research data have emphasized the interaction between the nervous and the immune systems. In this regard, it has been demonstrated that the disruption of the blood-brain barrier (BBB) secondary to peripheral inflammation may play a key role in this relationship. This assumption is linked to recent findings according to which units that constitute the BBB are not only simply neurologic but have also been reconsidered as "neurovascular" elements, through which immune system molecules are vehiculated within the central nervous system (CNS)...
July 2016: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/27845201/impaired-neurovascular-coupling-in-aging-and-alzheimer-s-disease-contribution-of-astrocyte-dysfunction-and-endothelial-impairment-to-cognitive-decline
#9
REVIEW
Stefano Tarantini, Cam Ha T Tran, Grant R Gordon, Zoltan Ungvari, Anna Csiszar
The importance of (micro)vascular contributions to cognitive impairment and dementia (VCID) in aging cannot be overemphasized, and the pathogenesis and prevention of age-related cerebromicrovascular pathologies are a subject of intensive research. In particular, aging impairs the increase in cerebral blood flow triggered by neural activation (termed neurovascular coupling or functional hyperemia), a critical mechanism that matches oxygen and nutrient delivery with the increased demands in active brain regions...
November 12, 2016: Experimental Gerontology
https://www.readbyqxmd.com/read/27844280/stem-cells-as-a-promising-tool-for-the-restoration-of-brain-neurovascular-unit-and-angiogenic-orientation
#10
REVIEW
Mohammad Hossein Geranmayeh, Alireza Nourazarian, Çığır Biray Avci, Reza Rahbarghazi, Mehdi Farhoudi
Establishing systemic therapeutics for neuro-inflammatory diseases is a main objective of regenerative medicine, certainly focusing on restoration of BBB dysfunction and neurovascular reconstitution. In this context, the regenerative capacity and therapeutic effects of different stem cells have been recently found to bring hopeful outcomes through trans-differentiation, paracrine interactions, and molecular cross-talk of transplanted stem cells with resident cells of blood-brain barrier. Here, we highlight some of the most recent scientific breakthroughs and discoveries by different authorities...
November 14, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27837475/pericytes-in-brain-injury-and-repair-after-ischemic-stroke
#11
REVIEW
Wei Cai, Huan Liu, Jingyan Zhao, Lily Y Chen, Jun Chen, Zhengqi Lu, Xiaoming Hu
Pericytes are functional components of the neurovascular unit (NVU). They provide support to other NVU components and maintain normal physiological functions of the blood-brain barrier (BBB). The brain ischemia and reperfusion result in pathological alterations in pericytes. The intimate anatomical and functional interactions between pericytes and other NVU components play pivotal roles in the progression of stroke pathology. In this review, we depict the biology and functions of pericytes in the normal brain and discuss their effects in brain injury and repair after ischemia/reperfusion...
November 12, 2016: Translational Stroke Research
https://www.readbyqxmd.com/read/27837191/age-associated-physiological-and-pathological-changes-at-the-blood-brain-barrier-a-review
#12
REVIEW
Franciska Erdő, László Denes, Elizabeth de Lange
The age-associated decline of the neurological and cognitive functions becomes more and more serious challenge for the developed countries with the increasing number of aged populations. The morphological and biochemical changes in the aging brain are the subjects of many extended research projects worldwide for a long time. However, the crucial role of the blood-brain barrier (BBB) impairment and disruption in the pathological processes in age-associated neurodegenerative disorders received special attention just for a few years...
November 11, 2016: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/27832709/a-model-of-neurovascular-coupling-and-the-bold-response-part-i
#13
E J Mathias, M J Plank, T David
The mechanisms with which neurons communicate with the vasculature to increase blood flow, termed neurovascular coupling is still unclear primarily due to the complex interactions between many parameters and the difficulty in accessing, monitoring and measuring them in the highly heterogeneous brain. Hence a solid theoretical framework based on existing experimental knowledge is necessary to study the relation between neural activity, the associated vasoactive factors released and their effects on the vasculature...
November 11, 2016: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/27832702/a-model-of-neurovascular-coupling-and-the-bold-response-part-ii
#14
E J Mathias, M J Plank, T David
A mathematical model is developed which describes a signalling mechanism of neurovascular coupling with a model of a pyramidal neuron and its corresponding fMRI BOLD response. In the first part of two papers (Part I) we described the integration of the neurovascular coupling unit extended to include a complex neuron model, which includes the important Na/K ATPase pump, with a model that provides a BOLD signal taking its input from the cerebral blood flow and the metabolic rate of oxygen consumption. We showed that this produced a viable signal in terms of initial dip, positive and negative BOLD signals...
November 11, 2016: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/27832340/the-neurovascular-unit-and-the-pathophysiologic-basis-of-diabetic-retinopathy
#15
REVIEW
Thomas W Gardner, Jose R Davila
PURPOSE: To relate the concept of the retinal neurovascular unit and its alterations in diabetes to the pathophysiology of diabetic retinopathy. METHODS: Case illustrations and conceptual frameworks are presented that illustrate adaptive and maladaptive "dis-integration" of the retinal neurovascular unit with the progression of diabetes. RESULTS: Retinopathy treatment should address pathophysiologic processes rather than pathologic lesions as is current practice...
November 10, 2016: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/27829126/oligodendrogenesis-after-traumatic-brain-injury
#16
REVIEW
Hajime Takase, Kazuo Washida, Kazuhide Hayakawa, Ken Arai, Xiaoying Wang, Eng H Lo, Josephine Lok
White matter injury is an important contributor to long term motor and cognitive dysfunction after traumatic brain injury. During brain trauma, acceleration, deceleration, torsion, and compression forces often cause direct damage to the axon tracts, and pathways that are triggered by the initial injury can trigger molecular events that result in secondary axon degeneration. White matter injury is often associated with altered mental status, memory deficits, motor or autonomic dysfunction, and contribute to the development of chronic neurodegenerative diseases...
November 6, 2016: Behavioural Brain Research
https://www.readbyqxmd.com/read/27813323/tumor-targeted-nanotherapeutics-overcoming-treatment-barriers-for-glioblastoma
#17
REVIEW
Aniket S Wadajkar, Jimena G Dancy, David S Hersh, Pavlos Anastasiadis, Nhan L Tran, Graeme F Woodworth, Jeffrey A Winkles, Anthony J Kim
Glioblastoma (GBM) is a highly aggressive and lethal form of primary brain cancer. Numerous barriers exist to the effective treatment of GBM including the tightly controlled interface between the bloodstream and central nervous system termed the 'neurovascular unit,' a narrow and tortuous tumor extracellular space containing a dense meshwork of proteins and glycosaminoglycans, and genomic heterogeneity and instability. A major goal of GBM therapy is achieving sustained drug delivery to glioma cells while minimizing toxicity to adjacent neurons and glia...
November 4, 2016: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
https://www.readbyqxmd.com/read/27808256/the-role-of-pericytic-laminin-in-blood-brain-barrier-integrity-maintenance
#18
Jyoti Gautam, Xuanming Zhang, Yao Yao
Laminin, a major component of the basement membrane, plays an important role in blood brain barrier regulation. At the neurovascular unit, brain endothelial cells, astrocytes, and pericytes synthesize and deposit different laminin isoforms into the basement membrane. It has been shown that laminin α4 (endothelial laminin) regulates vascular integrity at embryonic/neonatal stage, while astrocytic laminin maintains vascular integrity in adulthood. Here, we investigate the function of pericyte-derived laminin in vascular integrity...
November 3, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27787268/anatomy-of-the-cervicomental-region-insights-from-an-anatomy-laboratory-and-roundtable-discussion
#19
Jeffrey M Kenkel, Derek H Jones, Steven Fagien, Dee Anna Glaser, Gary D Monheit, Karen Stauffer, Jonathan M Sykes
In 2015, ATX-101 (deoxycholic acid injection; Kybella in the United States and Belkyra in Canada; Kythera Biopharmaceuticals, Inc., Westlake Village, CA [an affiliate of Allergan plc, Dublin, Ireland]) was approved as a first-in-class injectable drug for reduction of submental fat. Use of a pharmacologic/injectable therapy within the submental region requires a thorough understanding of cervicomental anatomy to ensure proper injection technique and safe administration. To this end, an anatomy laboratory was conducted to review key external landmarks and important internal anatomic structures that characterize the lower face and anterior neck...
November 2016: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/27783302/perinatal-brain-injury-is-accompanied-by-disturbances-in-expression-of-slc-protein-superfamily-in-endotheliocytes-of-hippocampal-microvessels
#20
A V Morgun, N V Kuvacheva, E D Khilazheva, E A Pozhilenkova, Ya V Gorina, N A Malinovskaya, Yu K Komleva, O L Lopatina, Yu A Panina, E D Gasymly, A B Salmina
The peculiarities in expression of transport proteins and the proteins implicated in the control of glycolysis by the cellular components of neurovascular units were examined in animals of different age under normal conditions and after modeled perinatal stress or hypoxic brain injury. In both cases, the specialties in expression of transport proteins in ontogenesis were revealed. The perinatal hypoxic brain injury resulted in up-regulation of MCT1, MCT4, and GLUT4 expression in endotheliocytes of hippocampal microvessels accompanied by transient elevation of HIF-1α and GSK3 expression...
October 26, 2016: Bulletin of Experimental Biology and Medicine
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