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https://www.readbyqxmd.com/read/29904952/baicalin-effects-on-rats-with-spinal-cord-injury-by-anti-inflammatory-and-regulating-the-serum-metabolic-disorder
#1
Shufeng Kang, Shizhao Liu, Hongzhu Li, Dapeng Wang, Xiangbei Qi
Baicalin had neuroprotective effects on inhibiting neuronal cell apoptosis induced by spinal cord ischemic injury. This study aimed to explore the protective effects of Baicalin on rats with spinal cord injury (SCI) and its mechanism of action. The recovery of spinal cord nerve function in rats was evaluated by the Basso, Beattie, and Bresnahan (BBB) score and the combine behavioral score (CBS). The expressions of cytokines tumor necrosis factor α (TNF-α), interleukin-1β (IL-1β), and IL-6 were detected by the enzyme-linked immunosorbent assay method...
June 15, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29902567/pre-and-post-surgery-mrsi-predictive-value-in-adult-oligodendroglioma-prognosis
#2
Caroline Bund, François Lefebvre, Roland Schott, Marie-Pierre Chenard, Benoît Lhermitte, Hélène Cebula, Stéphane Kremer, François Proust, Izzie-Jacques Namer
PURPOSE: The aim of this study was to study the relationship between MRSI, before and after surgery, and patient survival. The accuracy of pre-operative MRSI in differentiating low- from high-grade oligodendrogliomas (ODGs) was also studied. METHODS: Two hundred patients with ODG were retrospectively included in this study between 2000 and 2016. All patients underwent MRSI before any treatment or biopsy and/or after surgery for an intra-axial brain tumour. The R software was used for statistical data analysis...
June 11, 2018: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29902200/acrin-6684-multicenter-phase-ii-assessment-of-tumor-hypoxia-in-newly-diagnosed-glioblastoma-using-magnetic-resonance-spectroscopy
#3
Eva-Maria Ratai, Zheng Zhang, James Fink, Mark Muzi, Lucy Hanna, Erin Greco, Todd Richards, Daniel Kim, Ovidiu C Andronesi, Akiva Mintz, Lale Kostakoglu, Melissa Prah, Benjamin Ellingson, Kathleen Schmainda, Gregory Sorensen, Daniel Barboriak, David Mankoff, Elizabeth R Gerstner
A multi-center imaging trial by the American College of Radiology Imaging Network (ACRIN) "A Multicenter, phase II assessment of tumor hypoxia in glioblastoma using 18F Fluoromisonidazole (FMISO) with PET and MRI (ACRIN 6684)", was conducted to assess hypoxia in patients with glioblastoma (GBM). The aims of this study were to support the role of proton magnetic resonance spectroscopic imaging (1H MRSI) as a prognostic marker for brain tumor patients in multi-center clinical trials. Seventeen participants from four sites had analyzable 3D MRSI datasets acquired on Philips, GE or Siemens scanners at either 1...
2018: PloS One
https://www.readbyqxmd.com/read/29893645/changes-in-brain-metabolite-concentrations-after-neonatal-hypoxic-ischemic-encephalopathy
#4
Jun Shibasaki, Noriko Aida, Naho Morisaki, Moyoko Tomiyasu, Yuri Nishi, Katsuaki Toyoshima
Purpose To investigate the time-course changes and predictive utility of brain metabolite concentrations in neonatal hypoxic-ischemic encephalopathy (HIE). Materials and Methods Sixty-eight neonates (age, 35-41 gestational weeks) with HIE were admitted to a neonatal intensive care unit between September 2009 and March 2016 and examined by using proton MR spectroscopy at 18-96 hours (n = 25) and 7-14 days (n = 64) after birth (35-43 postmenstrual weeks) to estimate metabolite concentrations in the deep gray matter...
June 12, 2018: Radiology
https://www.readbyqxmd.com/read/29883968/relationship-of-in-vivo-mr-parameters-to-histopathological-and-molecular-characteristics-of-newly-diagnosed-nonenhancing-lower-grade-gliomas
#5
Tracy L Luks, Tracy Richmond McKnight, Llewellyn E Jalbert, Aurelia Williams, Evan Neill, Khadjia A Lobo, Anders I Persson, Arie Perry, Joanna J Phillips, Annette M Molinaro, Susan M Chang, Sarah J Nelson
The goal of this research was to elucidate the relationship between WHO 2016 molecular classifications of newly diagnosed, nonenhancing lower grade gliomas (LrGG), tissue sample histopathology, and magnetic resonance (MR) parameters derived from diffusion, perfusion, and 1 H spectroscopic imaging from the tissue sample locations and the entire tumor. A total of 135 patients were scanned prior to initial surgery, with tumor cellularity scores obtained from 88 image-guided tissue samples. MR parameters were obtained from corresponding sample locations, and histograms of normalized MR parameters within the T2 fluid-attenuated inversion recovery lesion were analyzed in order to evaluate differences between subgroups...
June 5, 2018: Translational Oncology
https://www.readbyqxmd.com/read/29880254/elevated-hippocampal-choline-level-is-associated-with-altered-functional-connectivity-in-females-with-major-depressive-disorder-a-pilot-study
#6
Yingying Tang, Xiaoliu Zhang, Jianhua Sheng, Xuanhong Zhang, Jianye Zhang, Jiale Xu, Yajing Zhu, Junjie Wang, Tianhong Zhang, Shanbao Tong, Lipeng Ning, Manhua Liu, Yao Li, Jijun Wang
Metabolic and functional alterations in hippocampus have been associated with the pathophysiology of major depressive disorder (MDD). However, how the hippocampal biochemical disruptions lead to dysfunction of limbic-cortical circuit remains unclear. The present pilot study combined magnetic resonance spectroscopy (MRS) and resting-state functional magnetic resonance imaging (rs-fMRI) to investigate the hippocampal metabolic alteration and its relationship with the intrinsic functional connectivity (FC) changes in MDD...
May 26, 2018: Psychiatry research. Neuroimaging
https://www.readbyqxmd.com/read/29868826/normalization-of-soluble-cd163-after-institution-of-antiretroviral-therapy-during-acute-hiv-infection-tracks-with-fewer-neurological-abnormalities
#7
Michelle L D'Antoni, Mary Margaret Byron, Phillip Chan, Napapon Sailasuta, Carlo Sacdalan, Pasiri Sithinamsuwan, Somporn Tipsuk, Suteeraporn Pinyakorn, Eugene Kroon, Bonnie M Slike, Shelly J Krebs, Vedbar S Khadka, Thep Chalermchai, Kalpana J Kallianpur, Merlin Robb, Serena Spudich, Victor Valcour, Jintanat Ananworanich, Lishomwa C Ndhlovu
Background: Myeloid activation contributes to cognitive impairment in chronic HIV. We explored whether combination anti-retroviral therapy (cART) initiation during acute HIV-infection impacts CD163 shedding, a myeloid activation marker, and in turn, implications on the CNS. Methods: We measured soluble (s)CD163 in plasma and CSF by ELISA in Thais who initiated cART during acute HIV-infection (Fiebig stages I-IV). Examination of CNS involvement included neuropsychological testing and brain metabolites by MRS...
June 2, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29867401/perinatal-hiv-infection-or-exposure-is-associated-with-low-n-acetylaspartate-and-glutamate-in-basal-ganglia-at-age-9-but-not-7-years
#8
Frances C Robertson, Martha J Holmes, Mark F Cotton, Els Dobbels, Francesca Little, Barbara Laughton, André J W van der Kouwe, Ernesta M Meintjes
Abnormalities of the basal ganglia are frequently seen in HIV-infected (HIV+) children despite antiretroviral treatment (ART) initiation during childhood. Assessment of metabolites associated with neuronal integrity or with glial proliferation can present a sensitive description of metabolic events underlying basal ganglia structural changes. We used magnetic resonance spectroscopy to examine differences in creatine, choline, N -acetylaspartate (NAA), glutamate, and myo-inositol between HIV+ children and HIV-unexposed controls, as well as between HIV-exposed uninfected (HEU) children and HIV-unexposed controls at age 7 and at age 9...
2018: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29860500/intralipid-heparin-infusion-alters-the-brain-metabolites-assessed-with-1h-mrs-spectroscopy-in-young-healthy-men
#9
Monika Karczewska-Kupczewska, Agnieszka Nikolajuk, Remigiusz Filarski, Radoslaw Majewski, Eugeniusz Tarasów
Context: We previously demonstrated that insulin infusion altered the metabolite concentrations in cerebral tissues, assessed with proton magnetic resonance spectroscopy (1H-MRS) in young subjects with high insulin sensitivity, but not with low insulin sensitivity. Fat overload is an important factor leading to insulin resistance. Objective: The purpose of the present study was to examine the effect of circulating free fatty acids (FFA) elevation on the metabolites in cerebral tissues, assessed with 1H-MRS...
April 20, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29859874/newfound-effect-of-n-acetylaspartate-in-preventing-and-reversing-aggregation-of-amyloid-beta-in-vitro
#10
Jean-Pierre Dollé, Jeffrey M Rodgers, Kevin D Browne, Thomas Troxler, Feng Gai, Douglas H Smith
Although N-acetylaspartate (NAA) has long been recognized as the most abundant amino acid in neurons by far, its primary role has remained a mystery. Based on its unique tertiary structure, we explored the potential of NAA to modulate aggregation of amyloid-beta (Aβ) peptide 1-42 via multiple corroborating aggregation assays along with electron microscopy. Thioflavin-T fluorescence assay demonstrated that at physiological concentrations, NAA substantially inhibited the initiation of Aβ fibril formation. In addition, NAA added after 25 min of Aβ aggregation was shown to break up preformed fibrils...
May 31, 2018: Neurobiology of Disease
https://www.readbyqxmd.com/read/29808778/a-mild-traumatic-brain-injury-in-mice-produces-lasting-deficits-in-brain-metabolism
#11
Danielle N Lyons, Hemendra Vekaria, Teresa Macheda, Vikas Bakshi, David K Powell, Brian T Gold, Ai-Ling Lin, Pat Sulllivan, Adam D Bachstetter
Metabolic uncoupling has been well-characterized during the first minutes-to-days after a traumatic brain injury (TBI), yet mitochondrial bioenergetics during the weeks-to-months after a brain injury is poorly defined, particularly after a mild TBI. We hypothesized that a closed head injury (CHI) would be associated with deficits in mitochondrial bioenergetics at one month after the injury. A significant decrease in state-III (ATP production) and state-V (complex-I) driven mitochondrial respiration was found at 1-month post-injury in adult C57Bl/6J mice...
May 29, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29797626/embryonal-tumor-with-multilayered-rosettes-c19mc-altered-clinical-pathological-and-neuroimaging-findings
#12
Bing Wang, Bhanu Gogia, Gregory N Fuller, Leena M Ketonen
BACKGROUND AND PURPOSE: Embryonal tumor with multilayered rosettes (ETMR), C19MC-altered, is a recently described, rare central nervous system tumor. To our knowledge, the imaging findings of this tumor have not been systematically evaluated in the neuroradiology literature. We present here the clinical, radiological, and pathological correlation of a case series of this very rare tumor, including the full range of anatomic compartment presentations (supratentorial, infratentorial, and spinal)...
May 24, 2018: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/29773892/metabolite-cycled-density-weighted-concentric-rings-k-space-trajectory-dw-crt-enables-high-resolution-1-h-magnetic-resonance-spectroscopic-imaging-at-3-tesla
#13
Adam Steel, Mark Chiew, Peter Jezzard, Natalie L Voets, Puneet Plaha, Michael Albert Thomas, Charlotte J Stagg, Uzay E Emir
Magnetic resonance spectroscopic imaging (MRSI) is a promising technique in both experimental and clinical settings. However, to date, MRSI has been hampered by prohibitively long acquisition times and artifacts caused by subject motion and hardware-related frequency drift. In the present study, we demonstrate that density weighted concentric ring trajectory (DW-CRT) k-space sampling in combination with semi-LASER excitation and metabolite-cycling enables high-resolution MRSI data to be rapidly acquired at 3 Tesla...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29770848/imaging-biomarkers-from-multiparametric-magnetic-resonance-imaging-are-associated-with-survival-outcomes-in-patients-with-brain-metastases-from-breast-cancer
#14
Bang-Bin Chen, Yen-Shen Lu, Chih-Wei Yu, Ching-Hung Lin, Tom Wei-Wu Chen, Shwu-Yuan Wei, Ann-Lii Cheng, Tiffany Ting-Fang Shih
OBJECTIVES: The aim of this study is to investigate the correlation of survival outcomes with imaging biomarkers from multiparametric magnetic resonance imaging (MRI) in patients with brain metastases from breast cancer (BMBC). METHODS: This study was approved by the institutional review board. Twenty-two patients with BMBC who underwent treatment involving bevacizumab on day 1, etoposide on days 2-4, and cisplatin on day 2 in 21-day cycles were prospectively enrolled for a phase II study...
May 16, 2018: European Radiology
https://www.readbyqxmd.com/read/29752742/j-difference-edited-mrs-measures-of-%C3%AE-aminobutyric-acid-before-and-after-acute-caffeine-administration
#15
Georg Oeltzschner, Helge J Zöllner, Marc Jonuscheit, Rotem S Lanzman, Alfons Schnitzler, Hans-Jörg Wittsack
PURPOSE: The aim of this study was to investigate potential effects of acute caffeine intake on J-difference-edited MRS measures of the primary inhibitory neurotransmitter γ-aminobutyric acid (GABA). METHODS: J-difference-edited Mescher-Garwood PRESS (MEGA-PRESS) and conventional PRESS data were acquired at 3T from voxels in the anterior cingulate and occipital area of the brain in 15 healthy subjects, before and after oral intake of a 200-mg caffeine dose. MEGA-PRESS data were analyzed with the MATLAB-based Gannet tool to estimate GABA+ macromolecule (GABA+) levels, while PRESS data were analyzed with LCModel to estimate levels of glutamate, glutamate+glutamine, N-acetylaspartate, and myo-inositol...
May 12, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29749094/magnetic-resonance-spectroscopy-of-fiber-tracts-in-children-with-traumatic-brain-injury-a-combined-mrs-diffusion-mri-study
#16
Emily L Dennis, Talin Babikian, Jeffry Alger, Faisal Rashid, Julio E Villalon-Reina, Yan Jin, Alexander Olsen, Richard Mink, Christopher Babbitt, Jeffrey Johnson, Christopher C Giza, Paul M Thompson, Robert F Asarnow
Traumatic brain injury can cause extensive damage to the white matter (WM) of the brain. These disruptions can be especially damaging in children, whose brains are still maturing. Diffusion magnetic resonance imaging (dMRI) is the most commonly used method to assess WM organization, but it has limited resolution to differentiate causes of WM disruption. Magnetic resonance spectroscopy (MRS) yields spectra showing the levels of neurometabolites that can indicate neuronal/axonal health, inflammation, membrane proliferation/turnover, and other cellular processes that are on-going post-injury...
May 10, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29741097/metabolic-and-structural-imaging-at-7-tesla-after-repetitive-mild-traumatic-brain-injury-in-immature-rats
#17
Emin Fidan, Lesley M Foley, Lee Ann New, Henry Alexander, Patrick M Kochanek, T Kevin Hitchens, Hülya Bayır
Mild traumatic brain injury (mTBI) in children is a common and serious public health problem. Traditional neuroimaging findings in children who sustain mTBI are often normal, putting them at risk for repeated mTBI (rmTBI). There is a need for more sensitive imaging techniques capable of detecting subtle neurophysiological alterations after injury. We examined neurochemical and white matter changes using diffusion tensor imaging of the whole brain and proton magnetic resonance spectroscopy of the hippocampi at 7 Tesla in 18-day-old male rats at 7 days after mTBI and rmTBI...
January 2018: ASN Neuro
https://www.readbyqxmd.com/read/29740217/acupuncture-therapy-in-treating-migraine-results-of-a-magnetic-resonance-spectroscopy-imaging-study
#18
Tao Gu, Lei Lin, Yun Jiang, Juan Chen, Ryan Cn D'Arcy, Min Chen, Xiaowei Song
Background: Acupuncture has been proven to be effective as an alternative therapy in treating migraine, but the pathophysiological mechanisms of the treatment remain unclear. This study investigated possible neurochemical responses to acupuncture treatment. Patients and methods: Proton magnetic resonance spectroscopy imaging was used to investigate biochemical levels pre- and post-acupuncture treatment. Participants (N=45) included subjects diagnosed with: 1) migraine without aura; 2) cervicogenic headache; and 3) healthy controls...
2018: Journal of Pain Research
https://www.readbyqxmd.com/read/29727496/errors-in-1-h-mrs-estimates-of-brain-metabolite-concentrations-caused-by-failing-to-take-into-account-tissue-specific-signal-relaxation
#19
Charles Gasparovic, Hongji Chen, Paul G Mullins
Accurate measurement of brain metabolite concentrations with proton magnetic resonance spectroscopy (1 H-MRS) can be problematic because of large voxels with mixed tissue composition, requiring adjustment for differing relaxation rates in each tissue if absolute concentration estimates are desired. Adjusting for tissue-specific metabolite signal relaxation, however, also requires a knowledge of the relative concentrations of the metabolite in gray (GM) and white (WM) matter, which are not known a priori. Expressions for the estimation of the molality and molarity of brain metabolites with 1 H-MRS are extended to account for tissue-specific relaxation of the metabolite signals and examined under different assumptions with simulated and real data...
May 4, 2018: NMR in Biomedicine
https://www.readbyqxmd.com/read/29724763/%C3%AE-hydroxybutyrate-detection-with-proton-mr-spectroscopy-in-children-with-drug-resistant-epilepsy-on-the-ketogenic-diet
#20
J N Wright, R P Saneto, S D Friedman
BACKGROUND AND PURPOSE: The ketogenic diet, including both classic and modified forms, is an alternative to antiepileptic medications used in the treatment of drug-resistant epilepsy. We sought to evaluate the utility of proton MR spectroscopy for the detection of β-hydroxybutyrate in a cohort of children with epilepsy treated with the ketogenic diet and to correlate brain parenchymal metabolite ratios obtained from spectroscopy with β-hydroxybutyrate serum concentrations. MATERIALS AND METHODS: Twenty-three spectroscopic datasets acquired at a TE of 288 ms in children on the ketogenic diet were analyzed with LCModel using a modified basis set that included a simulated β-hydroxybutyrate resonance...
May 3, 2018: AJNR. American Journal of Neuroradiology
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