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https://www.readbyqxmd.com/read/29241912/radiofrequency-ablation-for-selective-reduction-in-complex-monochorionic-multiple-pregnancies-a-case-series
#1
Hong-Mei Wang, Hong-Yan Li, Xie-Tong Wang, Yan-Yun Wang, Lei Li, Bo Liang, Jing Wang, Jia Song
OBJECTIVE: To determine the safety and efficacy of radiofrequency ablation (RFA) for selective fetal reduction in complex monochorionic multiple pregnancies. MATERIALS AND METHODS: From July 2011 to January 2015, data on all cases treated with RFA were collected prospectively in our hospital. Indications, procedure details, cause of fetal demise and pregnancy outcomes were analyzed. Sonography and magnetic resonance imaging were performed to detect fetal brain damage...
December 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/29241396/critical-thresholds-of-icp-derived-continuous-cerebrovascular-reactivity-indices-for-outcome-prediction-in-non-craniectomized-tbi-patients-prx-pax-and-rac
#2
Frederick Adam Zeiler, Joseph Donnelly, Peter Smieleweski, David Menon, Peter John Hutchinson, Marek Czosnyka
To compare ICP derived cerebrovascular reactivity indices in their ability to predict 6-month outcome, and to determine/compare critical thresholds related to outcome for each index, in adult non-craniectomized traumatic brain injury (TBI). Using a retrospective cohort of non-decompressive craniectomy (non-DC) TBI patients, we performed univariate and multivariate binary logistic regression outcome analysis of: pressure reactivity index (PRx), pulse amplitude index (PAx) and a newly described index calculated as the Regression coefficient between intracranial pressure (ICP) waveform Amplitude and Cerebral perfusion pressure RAC (CPP)...
December 14, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29239212/sarcoma-family-kinase-activity-is-required-for-cortical-spreading-depression
#3
Fan Bu, Yan Wang, Liwen Jiang, Dongqing Ma, John P Quinn, Minyan Wang
Objectives Sarcoma family kinase activity is associated with multiple diseases including ischemia and cancer; however, its role in the mechanism of migraine aura has been less well characterised. This study aims to investigate whether sarcoma family kinase is required for cortical spreading depression. Methods Cortical spreading depression was induced by topical application of K+ to the cerebral cortex and was monitored using electrophysiology in rats, and intrinsic optical signal in mouse brain slices. Drugs were perfused into the contralateral cerebral ventricle for pharmacological manipulations in rats...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/29232607/simultaneous-uplc-ms-ms-analysis-of-two-stable-isotope-labeled-versions-of-sucrose-in-mouse-plasma-and-brain-samples-as-markers-of-blood-brain-barrier-permeability-and-brain-vascular-space
#4
Ekram Ahmed Chowdhury, Faleh Alqahtani, Raktima Bhattacharya, Reza Mehvar, Ulrich Bickel
Blood Brain Barrier (BBB) permeability is frequently compromised in the course of diseases affecting the central nervous system (CNS). Sucrose is a low molecular weight, hydrophilic marker with slow permeability at the naive BBB and therefore one of the widely used indicators of barrier integrity. Our laboratory recently developed a highly sensitive UPLC-MS/MS method for stable isotope labeled [13C12]sucrose in biological matrices. Correction of total brain concentration for contribution of intravascular space is required in such experiments in order to accurately measure BBB permeability, and it is often accomplished by vascular perfusion with buffer solutions prior to brain sampling...
December 6, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29230960/ciq-a-positive-allosteric-modulator-of-glun2c-d-containing-n-methyl-d-aspartate-receptors-rescues-striatal-synaptic-plasticity-deficit-in-a-mouse-model-of-parkinson-s-disease
#5
Mona Nouhi, Xiaoqun Zhang, Ning Yao, Karima Chergui
AIMS: To investigate if CIQ, a positive allosteric modulator of N-methyl-d-aspartate receptors (NMDARs) containing GluN2C/D subunits, rescues the loss of long-term potentiation (LTP) and forelimb-use asymmetry in a mouse model of Parkinson's disease (PD). METHODS: We have used electrophysiology in brain slices and the cylinder test to examine the effect of CIQ on glutamatergic synaptic transmission, synaptic plasticity, and forelimb-use in the unilateral 6-hydroxydopamine-lesion mouse model of PD...
December 11, 2017: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/29229555/reduced-cerebrovascular-reactivity-and-increased-resting-cerebral-perfusion-in-rats-exposed-to-a-cafeteria-diet
#6
Mariana Gomez-Smith, Rafal Janik, Evelyn M Lake, Lynsie A M Thomason, Conner Adams, Matthew S Jeffers, Bojana Stefanovic, Dale Corbett
To better understand the effects of a diet high in fat, sugar, and sodium on cerebrovascular function, Sprague Dawley rats were chronically exposed to a Cafeteria diet. Resting cerebral perfusion and cerebrovascular reactivity were quantified using continuous arterial spin labeling (CASL) magnetic resonance imaging (MRI). In addition, structural changes to the cerebrovasculature and susceptibility to ischemic lesion were examined. Compared to control animals fed standard chow (SD), Cafeteria diet (CAF) rats exhibited increased resting brain perfusion in the hippocampus and reduced cerebrovascular reactivity in response to 10% inspired CO2 challenges in both the hippocampus and the neocortex...
December 8, 2017: Neuroscience
https://www.readbyqxmd.com/read/29228704/role-of-hif-1a-in-regulating-autophagic-cell-survival-during-cerebral-ischemia-reperfusion-in-rats
#7
Yongqing Guo
Hypoxia-inducible factor-1a (HIF-1a) plays a beneficial role during cerebral ischemia reperfusion (IR), but the underlying molecular mechanisms are not completely understood. Here, we aimed to investigate the effects and molecular regulation of HIF-1a on brain cell apoptosis and autophagy during IR. We found that augmentation of HIF-1a in re-perfused hematopoietic cells significantly reduced brain damage, alleviated brain edema and improved neural function during IR, seemingly through two HIF-1a target genes BNIP3 and NIX, which were critical regulators for cell apoptosis and autophagic cell survival...
November 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29222024/continuous-and-not-continuous-2-week-treadmill-training-enhances-the-performance-in-the-passive-avoidance-test-in-ischemic-gerbils
#8
Ana Paula Cassiano Silveira, Takae Tamy Kitabatake, Vivian Mozol Pantaleo, Hélio Zangrossi, Guilherme Bertolino, Elaine Caldeira de Oliveira Guirro, Hugo Celso Dutra de Souza, João Eduardo de Araujo
This study aims to investigate the frequency and total duration effects of the 2-week treadmill training after experimental ischemic stroke in the passive avoidance test. We performed bilateral occlusion of common external carotid arteries, for five minutes, in Mongolian gerbils. The training groups were: continuous training for twelve consecutive days or not continuous training for six non-consecutive days. The groups remained in the treadmill for 15min, with the speed set at 10m/min, and the training started 24h after the stroke...
December 6, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29218511/optical-monitoring-of-cerebral-microcirculation-in-neurointensive-care
#9
Peter Rejmstad, Neda Haj-Hosseini, Oscar Åneman, Karin Wårdell
Continuous optical monitoring of local cerebral microcirculation could benefit neurointensive care patients treated for subarachnoid hemorrhage (SAH). The aim of the study was to evaluate laser Doppler flowmetry (LDF) and diffuse reflectance spectroscopy (DRS) for long-term monitoring of brain microcirculation and oxygen saturation (SO2) in the neurointensive care unit (NICU). A fiber optic probe was designed for intraparenchymal use and connected to LDF and DRS for assessment of the local blood flow (perfusion and tissue reflectance (TLI)) and SO2 in the brain...
December 8, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29218106/extracorporeal-shock-wave-therapy-effectively-protects-brain-against-chronic-cerebral-hypo-perfusion-induced-neuropathological-changes
#10
Han-Tan Chai, Kuan-Hung Chen, Christopher Glenn Wallace, Chih-Hung Chen, Pei-Hsun Sung, Yung-Lung Chen, Chun-Man Yuen, Pei-Lin Shao, Cheuk-Kwan Sun, Hsueh-Wen Chang, Ching-Jen Wang, Mel S Lee, Hon-Kan Yip, Sheung-Fat Ko
This study tested the hypothesis that extracorporeal shock wave (ECSW) therapy could protect mouse brain from chronic cerebral hypoperfusion (CHP)-induced neuropathological changes in a bilateral carotid arterial stenosis (CAS) model. Adult-male C57BL/6 (B6) mice (n=36) were randomized into group 1 (sham-control), group 2 (CHP) and group 3 [CHP+ECSW (100 impulses at 0.15 mJ/mm2) on day 5, 10 and 15 after CHP induction]. By day 60 after CHP induction, the white matter lesion, protein expressions of inflammatory (TNF-α/NF-κB/iNOS), oxidative-stress (NOX-1/NOX-2/NOX-4/nitrotyrosine), angiogenesis (eNOS/CD31), apoptotic (Bax/caspase-3/PARP), fibrotic (Smad3/TGF-ß) and mitochondrial-damaged (cytosolic cytochrome-C) biomarkers were significantly higher in group 2 than in groups 1 and 3, and significantly higher in group 3 than in group 1, whereas the protein expressions of anti-apoptotic (Bcl-2), anti-fibrotic (BMP-2/Smad1/5), and mitochondrial-integrity (mitochondrial cytochrome-C) biomarkers showed an opposite pattern to inflammation among the three groups (all P<0...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/29217363/positional-brain-single-photon-emission-computed-tomography-findings-in-a-case-of-limb-shaking-syndrome
#11
Caroline Bund, Céline Heimburger, Valérie Wolff, Izzie Jacques Namer
An 84-year-old man, who presented lower limbs limb-shaking syndrome at orthostatism lasting a few seconds, was referred in our stroke unit. Magnetic resonance imaging showed an acute infarction in the right thalamus and the insular cortex, left extracranial carotid stenosis at 80%, and low flow in the right middle cerebral artery but did not explain limb-shaking syndrome symptomatology. We performed comparative positional brain perfusion single-photon emission computed tomography (SPECT), in the upright and in the supine position, to explore and localize hypoperfusion-endangered brain structures that may be involved in the presenting symptoms...
December 4, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29213008/the-relationship-between-neurite-density-measured-with-confocal-microscopy-in-a-cleared-mouse-brain-and-metrics-obtained-from-diffusion-tensor-and-diffusion-kurtosis-imaging
#12
Ryusuke Irie, Koji Kamagata, Aurelien Kerever, Ryo Ueda, Suguru Yokosawa, Yosuke Otake, Hisaaki Ochi, Hidekazu Yoshizawa, Ayato Hayashi, Kazuhiko Tagawa, Hitoshi Okazawa, Kohske Takahashi, Kanako Sato, Masaaki Hori, Eri Arikawa-Hirasawa, Shigeki Aoki
PURPOSE: Diffusional kurtosis imaging (DKI) enables sensitive measurement of tissue microstructure by quantifying the non-Gaussian diffusion of water. Although DKI is widely applied in many situations, histological correlation with DKI analysis is lacking. The purpose of this study was to determine the relationship between DKI metrics and neurite density measured using confocal microscopy of a cleared mouse brain. METHODS: One thy-1 yellow fluorescent protein 16 mouse was deeply anesthetized and perfusion fixation was performed...
December 7, 2017: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/29212618/altered-cerebral-perfusion-in-infants-born-preterm-compared-with-infants-born-full-term
#13
Marine Bouyssi-Kobar, Jonathan Murnick, Marie Brossard-Racine, Taeun Chang, Eman Mahdi, Marni Jacobs, Catherine Limperopoulos
OBJECTIVES: To compare regional cerebral cortical blood flow (CBF) in infants born very preterm at term-equivalent age (TEA) and healthy newborns born full term and to examine the impact of clinical risk factors on CBF in the cohort born preterm. STUDY DESIGN: This prospective, cross-sectional study included infants born very preterm (gestational age at birth <32 weeks; birth weight <1500 g) and healthy infants born full term. Using noninvasive 3T arterial spin labeling magnetic resonance imaging, we quantified regional CBF in the cerebral cortex: sensorimotor/auditory/visual cortex, superior medial/dorsolateral prefrontal cortex, anterior cingulate cortex (ACC)/posterior cingulate cortex, insula, and lateral posterior parietal cortex, as well as in the brainstem, and deep gray matter...
November 30, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/29212405/a-description-of-a-new-continuous-physiologic-index-in-tbi-using-the-correlation-between-pulse-amplitude-of-icp-and-cerebral-perfusion-pressure
#14
Frederick Adam Zeiler, Joseph Donnelly, David Menon, Peter Smieleweski, Peter John Hutchinson, Marek Czosnyka
To describe a new continuous index of physiologic measurement in a TBI population, the moving correlation coefficient between intracranial pressure (ICP) pulse amplitude (AMP) and cerebral perfusion pressure (CPP), which we refer to as RAC. We use patient examples of sustained intracranial hypertension, systemic arterial hypotension and plateau waves, as well as the retrospective analysis of 358 non-decompressive craniectomy (DC) traumatic brain injury (TBI) patients with high frequency ICP and ABP data, to explore the relationships of this new index, RAC, with AMP, ICP, CPP, RAP, pressure reactivity index (PRx) and pulse amplitude index (PAx)...
December 6, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29208736/pathophysiological-and-behavioral-deficits-in-developing-mice-following-rotational-acceleration-deceleration-traumatic-brain-injury
#15
Guoxiang Wang, Yi Ping Zhang, Zhongwen Gao, Lisa B E Shields, Fang Li, Tianci Chu, Huayi Lv, Thomas Moriarty, Xiao-Ming Xu, Xiaoyu Yang, Christopher B Shields, Jun Cai
Abusive head trauma (AHT) is the leading cause of death from trauma in infants and young children. An AHT animal model was developed on 12-day-old mice subjected to 90° head extension-flexion sagittal shaking repeated 30, 60, 80, and 100 times. The mortality and time until return of consciousness were dependent on the number of repeats and severity of the injury. Under 60 times of repeated head shakings, the pups demonstrated apnea and/or bradycardia immediately after injury. Acute oxygen desaturation was observed by pulse oximetry during respiratory and cardiac suppression...
November 30, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/29205570/brain-angiogenic-gene-expression-in-congenital-heart-disease
#16
Olga Sánchez, Aina Ruiz-Romero, Carmen Domínguez, Queralt Ferrer, Irene Ribera, Víctor Rodríguez-Sureda, Jaume Alijotas, Sílvia Arévalo, Elena Carreras, Lluís Cabero, Elisa Llurba
OBJECTIVES: To analyze potential differences in the expression of antiangiogenic and angiogenic factors and of genes associated with chronic hypoxia in cerebral tissue from euploid fetuses with congenital heart disease (CHD) and control fetuses. METHODS: Cerebral tissue was obtained from 15 fetuses with CHD and 12 control fetuses undergoing termination of pregnancy. Expression profiles of the antiangiogenic soluble fms-like tyrosine kinase-1 (sFlt-1), the angiogenic vascular endothelial growth factor-A (VEGF-A) and placental growth factor (PlGF), and genes associated with chronic hypoxia were determined by real-time PCR in tissue from the frontal cortex and from basal ganglia-hypothalamus...
December 5, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/29204742/target-and-tissue-selectivity-prediction-by-integrated-mechanistic-pharmacokinetic-target-binding-and-quantitative-structure-activity-modeling
#17
Anna H C Vlot, Wilhelmus E A de Witte, Meindert Danhof, Piet H van der Graaf, Gerard J P van Westen, Elizabeth C M de Lange
Selectivity is an important attribute of effective and safe drugs, and prediction of in vivo target and tissue selectivity would likely improve drug development success rates. However, a lack of understanding of the underlying (pharmacological) mechanisms and availability of directly applicable predictive methods complicates the prediction of selectivity. We explore the value of combining physiologically based pharmacokinetic (PBPK) modeling with quantitative structure-activity relationship (QSAR) modeling to predict the influence of the target dissociation constant (K D) and the target dissociation rate constant on target and tissue selectivity...
December 4, 2017: AAPS Journal
https://www.readbyqxmd.com/read/29204685/methylene-blue-protects-the-isolated-rat-lungs-from-ischemia-reperfusion-injury-by-attenuating-mitochondrial-oxidative-damage
#18
Wen-Fang Tian, Si Zeng, Qiong Sheng, Jun-Liang Chen, Ping Weng, Xiao-Tong Zhang, Jia-Jia Yuan, Qing-Feng Pang, Zhi-Qiang Wang
INTRODUCTION: Impaired mitochondrial function is a key factor attributing to the lung ischemia reperfusion injury (LIRI). Methylene blue (MB) has been reported to attenuate brain and renal ischemia-reperfusion injury. We hypothesized that MB also could have a protective effect against LIRI by preventing mitochondrial oxidative damage. METHODS: Isolated rat lungs were assigned to the following four groups (n = 6): a sham group: perfusion for 105 min without ischemia; I/R group: shutoff of perfusion and ventilation for 45 min followed by reperfusion for 60 min; and I/R + MB group and I/R + glutathione (GSH) group: 2 mg/kg MB or 4 μM glutathione were intraperitoneally administered for 2 h, and followed by 45 min of ischemia and 60 min of reperfusion...
December 4, 2017: Lung
https://www.readbyqxmd.com/read/29203534/author-response-evaluation-of-hyperacute-infarct-volume-using-aspects-and-brain-ct-perfusion-core-volume
#19
Christopher R Levi, Jelle Demeestere, Carlos Garcia-Esperon, Pablo García-Bermejo, Fouke Ombelet, Patrick McElduff, Andrew Bivard, Mark Parsons
No abstract text is available yet for this article.
December 5, 2017: Neurology
https://www.readbyqxmd.com/read/29203533/letter-re-evaluation-of-hyperacute-infarct-volume-using-aspects-and-brain-ct-perfusion-core-volume
#20
Kars C J Compagne, Adriaan C G M van Es, Aad van der Lugt, Diederik W J Dippel
No abstract text is available yet for this article.
December 5, 2017: Neurology
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