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https://www.readbyqxmd.com/read/29333912/the-resting-state-fmri-arterial-signal-predicts-differential-blood-transit-time-through-the-brain
#1
Yunjie Tong, Jinxia Fiona Yao, J Jean Chen, Blaise deB Frederick
Previous studies have found that aperiodic, systemic low-frequency oscillations (sLFOs) are present in blood-oxygen-level-dependent (BOLD) data. These signals are in the same low frequency band as the "resting state" signal; however, they are distinct signals which represent non-neuronal, physiological oscillations. The same sLFOs are found in the periphery (i.e. finger tips) as changes in oxy/deoxy-hemoglobin concentration using concurrent near-infrared spectroscopy. Together, this evidence points toward an extra-cerebral origin of these sLFOs...
January 1, 2018: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29330155/amlexanox-inhibits-cerebral-ischemia-induced-delayed-astrocytic-high-mobility-group-box-1-release-and-subsequent-brain-damage
#2
Sebok Kumar Halder, Hiroshi Ueda
High-mobility group box 1 (HMGB1) is increased in the cerebrospinal fluid (CSF) and serum during the early- and late-phases of brain ischemia and is known to contribute to brain damage. However, detailed characterization underlying cell type-specific HMGB1 release and pathophysiological roles of extracellularly released HMGB1 in ischemic brain remain unclear. Here, we examined cell type-specific HMGB1 release and therapeutic potential of amlexanox, an inhibitor of non-classical release, and an anti-HMGB1 antibody against ischemic brain damage...
January 12, 2018: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/29325957/effect-and-feasibility-of-therapeutic-hypothermia-in-patients-with-hemorrhagic-stroke-a-systematic-review-and-meta-analysis
#3
REVIEW
Zhong Yao, Chao You, Min He
INTRODUCTION: Therapeutic hypothermia (TH) has shown a good performance in the experimental hemorrhagic stroke. But the clinical application of TH remains controversial since reports regarding its therapeutic effect are inconsistent. METHODS: We conducted a systematic review based on Preferred Reporting Items for Systematic Reviews and Meta-analyses. Compare TH with control group in terms of mortality, the poor outcome, delayed cerebral ischemia (DCI) and specific complications...
January 8, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29324873/a-new-strength-assessment-to-evaluate-the-association-between-muscle-weakness-and-gait-pathology-in-children-with-cerebral-palsy
#4
Marije Goudriaan, Angela Nieuwenhuys, Simon-Henri Schless, Nathalie Goemans, Guy Molenaers, Kaat Desloovere
AIM: The main goal of this validation study was to evaluate whether lower limb muscle weakness and plantar flexor rate of force development (RFD) related to altered gait parameters in children with cerebral palsy (CP), when weakness was assessed with maximal voluntary isometric contractions (MVICs) in a gait related test position. As a subgoal, we analyzed intra- and intertester reliability of this new strength measurement method. METHODS: Part 1 -Intra- and intertester reliability were determined with the intra-class correlation coefficient (ICC2,1) in 10 typical developing (TD) children (age: 5-15)...
2018: PloS One
https://www.readbyqxmd.com/read/29321200/bilateral-haemorrhagic-basal-ganglia-infarction-associated-with-early-onset-group-b-streptococcus-meningitis
#5
Rajesh Gupta, Taiwo Maraiyesa, Brendon Conry
A 2-day-old infant presented with poor feeding and grunting. Investigations revealed a raised C reactive protein of 164. Full septic screen was done, which subsequently confirmed a diagnosis of group B streptococcus meningitis. Baby was apyrexial and haemodynamically stable. There were no obvious neurological manifestations, and a routine cranial ultrasound scan was done, which revealed echogenic changes in the basal ganglia and thalami. MRI brain showed extensive haemorrhagic infarction within the lentiform and caudate nuclei with involvement of both posterior limbs of the internal capsule...
January 9, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29320647/long-term-effects-of-inhaled-budesonide-for-bronchopulmonary-dysplasia
#6
Dirk Bassler, Eric S Shinwell, Mikko Hallman, Pierre-Henri Jarreau, Richard Plavka, Virgilio Carnielli, Christoph Meisner, Corinna Engel, Alexander Koch, Karen Kreutzer, Johannes N van den Anker, Matthias Schwab, Henry L Halliday, Christian F Poets
BACKGROUND: The long-term effects on neurodevelopment of the use of inhaled glucocorticoids in extremely preterm infants for the prevention or treatment of bronchopulmonary dysplasia are uncertain. METHODS: We randomly assigned 863 infants (gestational age, 23 weeks 0 days to 27 weeks 6 days) to receive early (within 24 hours after birth) inhaled budesonide or placebo. The prespecified secondary long-term outcome was neurodevelopmental disability among survivors, defined as a composite of cerebral palsy, cognitive delay (a Mental Development Index score of <85 [1 SD below the mean of 100] on the Bayley Scales of Infant Development, Second Edition, with higher scores on the scale indicating better performance), deafness, or blindness at a corrected age of 18 to 22 months...
January 11, 2018: New England Journal of Medicine
https://www.readbyqxmd.com/read/29317364/early-decompressive-hemicraniectomy-for-malignant-middle-cerebral-artery-infarction-in-asian-patients-a-single-centre-study
#7
Prakash Paliwal, Farasat Kazmi, Hock Luen Teoh, Leonard Ll Yeo, Raymond Cs Seet, Tseng Tsai Yeo, Lwin Sein, Ning Chou, Thomas Tch, Bernard Pl Chan, Vijay K Sharma
INTRODUCTION: Early Decompression craniectomy(within 48-hours of stroke-onset) in acute and malignant middle cerebral artery(MCA) ischemic stroke(IS) reduces mortality and increases the proportion of patients with favourable functional outcome. Various cultural and social issues anong Asians lead to some differences in clinical practice specially when surgical interventions are involved. Accordingly decompressive craniectomy in Asian stroke patients is often delayed. MATERIALS & METHODS: Data for all acute IS patients hospitalized to our center were entered into a prospectively maintained registry...
January 6, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29316834/delayed-administration-of-bq788-an-etb-antagonist-after-experimental-traumatic-brain-injury-promotes-recovery-of-blood-brain-barrier-function-and-reduction-of-cerebral-edema-in-mice
#8
Shotaro Michinaga, Akimasa Kimura, Shunichi Hatanaka, Shizuho Minami, Arisa Asano, Yuki Ikushima, Shingo Matsui, Yoshiya Toriyama, Manami Fujii, Yutaka Koyama
Traumatic brain injury (TBI) is induced by immediate physical disruption of brain tissue, and causes death and disability. Studies on experimental TBI animal models show that disruption of the blood-brain barrier (BBB) underlies brain edema and neuroinflammation during the delayed phase of TBI. In neurological disorders, endothelin-1 (ET-1) is involved in BBB dysfunction and brain edema. In this study, the effect of ET antagonists on BBB dysfunction and brain edema were examined in a mouse focal TBI model using lateral fluid percussion injury (FPI)...
January 9, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29315770/diffusion-sensitivity-of-3d-grase-in-arterial-spin-labeling-perfusion
#9
Xiang He, Kenneth Wengler, Mark E Schweitzer
PURPOSE: To evaluate the role of true diffusion and flow-related pseudodiffusion in cerebral blood flow (CBF) quantification using arterial spin labeling (ASL) with single-shot or segmented 3D gradient and spin echo (GRASE) readouts. THEORY: The extended phase graph (EPG) algorithm, originally designed to model the effects of T1 /T2 relaxation and true diffusion in MRI acquisitions utilizing multiple refocusing RF pulses, was augmented (aEPG). This augmentation accounted for flow-related pseudodiffusion attenuation of intravascular MRI signal in the k-space domain during 3D-GRASE acquisition, which leads to blur along the partition direction in the image domain...
January 7, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29315561/faim2-contributes-to-neuroprotection-by-erythropoietin-in-transient-brain-ischemia
#10
Daniel Komnig, Karen Gertz, Pardes Habib, Kay W Nolte, Tareq Meyer, Marc A Brockmann, Matthias Endres, Birgit Rathkolb, Martin Hrabě de Angelis, Jörg B Schulz, Björn H Falkenburger, Arno Reich
Delayed cell death in the penumbra region of acute ischemic stroke occurs through apoptotic mechanisms, making it amenable to therapeutic interventions. Fas/CD95 mediates apoptotic cell death in response to external stimuli. In mature neurons, Fas/CD95 signaling is modulated by Fas-apoptotic inhibitory molecule 2 (Faim2), which reduces cell death in animal models of stroke, meningitis, and Parkinson disease. Erythropoietin (EPO) has been studied as a therapeutic strategy in ischemic stroke. Erythropoietin stimulates the phosphatidylinositol-3 kinase/Akt (PI3K/Akt) pathway, which regulates Faim2 expression...
January 8, 2018: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29306567/platelet-rich-plasma-derived-scaffolds-increase-the-benefit-of-delayed-mesenchymal-stromal-cell-therapy-after-severe-traumatic-brain-injury
#11
Celia Bonilla Horcajo, Mercedes Zurita Castillo, Jesús Vaquero Crespo
BACKGROUND: Cell therapy using mesenchymal stromal cells (MSCs) offers new perspectives in the treatment of traumatic brain injury (TBI). The aim of the present study was to assess the impact of platelet-rich plasma scaffolds (PRPS) as support of MSCs in a delayed phase after severe TBI in rats. METHODS: TBI was produced by weight-drop impact to the right cerebral hemisphere. Two months after TBI, four experimental groups were established; saline, PRPS, MSCs in saline, or MSCs in PRPS was transplanted into the area of brain lesion through a small hole...
January 3, 2018: Cytotherapy
https://www.readbyqxmd.com/read/29305158/tbr2-antagonizes-retinoic-acid-dependent-neuronal-differentiation-by-repressing-zfp423-during-corticogenesis
#12
Luca Massimino, Lisbeth Flores-Garcia, Bruno Di Stefano, Gaia Colasante, Cecilia Icoresi-Mazzeo, Mattia Zaghi, Bruce A Hamilton, Alessandro Sessa
During cerebral cortex development, neural progenitors are required to elaborate a variety of cell differentiation signals to which they are continuously exposed. RA acid is a potent inducer of neuronal differentiation as it was found to influence cortical development. We report herein that TBR2, a transcription factor specific to Intermediate (Basal) Neural Progenitors (INPs), represses activation of the RA responsive element and expression of RA target genes in cell lines. This repressive action on RA signaling was functionally confirmed by the decrease of RA-mediated neuronal differentiation in neural stem cells stably overexpressing TBR2...
January 2, 2018: Developmental Biology
https://www.readbyqxmd.com/read/29302799/early-abnormal-transient-hyperemic-response-test-can-predict-delayed-ischemic-neurologic-deficit-in-subarachnoid-hemorrhage
#13
Hosam Al-Jehani, Mark Angle, Judith Marcoux, Jeanne Teitelbaum
BACKGROUND: Early detection of vasospasm is crucial to prevent significant delayed ischemic neurological deficit post subarachnoid hemorrhage. The standard methods of detection, including cerebral angiogram and computed tomography are invasive and not safe to be repeated, as is very often indicated clinically. Transient hyperemic response test has been previously used to predict autoregulation failure in traumatic brain injury and subarachnoid hemorrhage. AIMS: We investigate the usability of transient hyperemic response test as a predictor of clinical vasospasm in a cohort of patients with aneurismal subarachnoid hemorrhage...
January 4, 2018: Critical Ultrasound Journal
https://www.readbyqxmd.com/read/29299616/increased-variability-of-watershed-areas-in-patients-with-high-grade-carotid-stenosis
#14
Stephan Kaczmarz, Vanessa Griese, Christine Preibisch, Michael Kallmayer, Michael Helle, Isabel Wustrow, Esben Thade Petersen, Hans-Henning Eckstein, Claus Zimmer, Christian Sorg, Jens Göttler
PURPOSE: Watershed areas (WSAs) of the brain are most susceptible to acute hypoperfusion due to their peripheral location between vascular territories. Additionally, chronic WSA-related vascular processes underlie cognitive decline especially in patients with cerebral hemodynamic compromise. Despite of high relevance for both clinical diagnostics and research, individual in vivo WSA definition is fairly limited to date. Thus, this study proposes a standardized segmentation approach to delineate individual WSAs by use of time-to-peak (TTP) maps and investigates spatial variability of individual WSAs...
January 3, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29298444/human-malformation-syndromes-of-defective-gli-opposite-phenotypes-of-2q14-2-gli2-and-7p14-2-gli3-microdeletions-and-a-glia-r-balance-model
#15
Yo Niida, Mika Inoue, Mamoru Ozaki, Etsuko Takase
GLI family zinc finger proteins are transcriptional effectors of the sonic hedgehog signaling pathway. GLI regulates gene expression and repression at various phases of embryonic morphogenesis. In humans, 4 GLI genes are known, and GLI2 (2q14.2) and GLI3 (7p14.1) mutations cause different syndromes. Here, we present 2 distinctive cases with a chromosomal microdeletion in one of these genes. Patient 1 is a 14-year-old girl with Culler-Jones syndrome. She manifested short stature, cleft palate, and mild intellectual/social disability caused by a 6...
January 4, 2018: Cytogenetic and Genome Research
https://www.readbyqxmd.com/read/29296615/minocycline-protects-against-delayed-cerebral-ischemia-after-subarachnoid-hemorrhage-via-matrix-metalloproteinase-9-inhibition
#16
Ananth K Vellimana, Meng-Liang Zhou, Itender Singh, Diane J Aum, James W Nelson, Glenn R Harris, Umeshkumar Athiraman, Byung H Han, Gregory J Zipfel
Objective: Delayed cerebral ischemia (DCI) is an independent risk factor for poor outcome after aneurysmal subarachnoid hemorrhage (SAH) and is multifactorial in etiology. While prior studies have suggested a role for matrix metalloproteinase-9 (MMP-9) in early brain injury after SAH, its contribution to the pathophysiology of DCI is unclear. Methods: In the first experiment, wild-type (WT) and MMP-9-/- mice were subjected to sham or endovascular perforation SAH surgery...
December 2017: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/29290337/kiaa1109-variants-are-associated-with-a-severe-disorder-of-brain-development-and-arthrogryposis
#17
Lucie Gueneau, Richard J Fish, Hanan E Shamseldin, Norine Voisin, Frédéric Tran Mau-Them, Egle Preiksaitiene, Glen R Monroe, Angeline Lai, Audrey Putoux, Fabienne Allias, Qamariya Ambusaidi, Laima Ambrozaityte, Loreta Cimbalistienė, Julien Delafontaine, Nicolas Guex, Mais Hashem, Wesam Kurdi, Saumya Shekhar Jamuar, Lim J Ying, Carine Bonnard, Tommaso Pippucci, Sylvain Pradervand, Bernd Roechert, Peter M van Hasselt, Michaël Wiederkehr, Caroline F Wright, Ioannis Xenarios, Gijs van Haaften, Charles Shaw-Smith, Erica M Schindewolf, Marguerite Neerman-Arbez, Damien Sanlaville, Gaëtan Lesca, Laurent Guibaud, Bruno Reversade, Jamel Chelly, Vaidutis Kučinskas, Fowzan S Alkuraya, Alexandre Reymond
Whole-exome and targeted sequencing of 13 individuals from 10 unrelated families with overlapping clinical manifestations identified loss-of-function and missense variants in KIAA1109 allowing delineation of an autosomal-recessive multi-system syndrome, which we suggest to name Alkuraya-Kučinskas syndrome (MIM 617822). Shared phenotypic features representing the cardinal characteristics of this syndrome combine brain atrophy with clubfoot and arthrogryposis. Affected individuals present with cerebral parenchymal underdevelopment, ranging from major cerebral parenchymal thinning with lissencephalic aspect to moderate parenchymal rarefaction, severe to mild ventriculomegaly, cerebellar hypoplasia with brainstem dysgenesis, and cardiac and ophthalmologic anomalies, such as microphthalmia and cataract...
December 27, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/29288284/transit-time-corrected-arterial-spin-labeling-technique-aids-to-overcome-delayed-transit-time-effect
#18
Tae Jin Yun, Chul-Ho Sohn, Roh-Eul Yoo, Kyung Mi Kang, Seung Hong Choi, Ji-Hoon Kim, Sun-Won Park, Moonjung Hwang, R Marc Lebel
PURPOSE: This study aimed to evaluate the usefulness of transit time corrected cerebral blood flow (CBF) maps based on multi-phase arterial spin labeling MR perfusion imaging (ASL-MRP). METHODS: The Institutional Review Board of our hospital approved this retrospective study. Written informed consent was waived. Conventional and multi-phase ASL-MRPs and dynamic susceptibility contrast MR perfusion imaging (DSC-MRP) were acquired for 108 consecutive patients. Vascular territory-based volumes of interest were applied to CBF and time to peak (TTP) maps obtained from DSC-MRP and CBF maps obtained from conventional and multi-phase ASL-MRPs...
December 29, 2017: Neuroradiology
https://www.readbyqxmd.com/read/29288070/neonatal-erythropoietin-mitigates-impaired-gait-social-interaction-and-diffusion-tensor-imaging-abnormalities-in-a-rat-model-of-prenatal-brain-injury
#19
Shenandoah Robinson, Christopher J Corbett, Jesse L Winer, Lindsay A S Chan, Jessie R Maxwell, Christopher V Anstine, Tracylyn R Yellowhair, Nicholas A Andrews, Yirong Yang, Laurel O Sillerud, Lauren L Jantzie
Children who are born preterm are at risk for encephalopathy of prematurity, a leading cause of cerebral palsy, cognitive delay and behavioral disorders. Current interventions are limited and none have been shown to reverse cognitive and behavioral impairments, a primary determinant of poor quality of life for these children. Moreover, the mechanisms of perinatal brain injury that result in functional deficits and imaging abnormalities in the mature brain are poorly defined, limiting the potential to target interventions to those who may benefit most...
December 26, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/29285410/the-clinical-examination-in-the-patient-with-subarachnoid-hemorrhage-is-still-the-most-reliable-parameter-for-predicting-pathophysiological-changes
#20
Athanasios K Petridis, Kerim Beseoglu, Hans J Steiger
Background: Macrovasospasms and delayed cerebral injury are factors which correlate with high morbidity in patients suffering a subarachnoid hemorrhage. Transcranial Doppler (TCD) ultrasonography and perfusion computed tomography (PCT) are diagnostic tools used to diagnose such pathologies. However, TCD is not very reliable and PCT exposes patients to radiation and cannot be performed daily. Case Description: We present the case of a 47-year-old female with subarachnoid hemorrhage caused by rupture of an intracranial aneurysm...
2017: Surgical Neurology International
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