keyword
MENU ▼
Read by QxMD icon Read
search

MRS brain

keyword
https://www.readbyqxmd.com/read/29449278/7t-brain-mrs-in-hiv-infection-correlation-with-cognitive-impairment-and-performance-on-neuropsychological-tests
#1
M Mohamed, P B Barker, R L Skolasky, N Sacktor
BACKGROUND AND PURPOSE: Validated neuroimaging markers of HIV-associated neurocognitive disorder in patients on antiretroviral therapy are urgently needed for clinical trials. The purpose of this study was to explore the relationship between cognitive impairment and brain metabolism in older subjects with HIV infection. It was hypothesized that MR spectroscopy measurements related to neuronal health and function (particularly N -acetylaspartate and glutamate) would be lower in HIV-positive subjects with worse cognitive performance...
February 15, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29449141/neurometabolites-alteration-in-the-acute-phase-of-mild-traumatic-brain-injury-mtbi-an-in-vivo-proton-magnetic-resonance-spectroscopy-1h-mrs-study
#2
Vigneswaran Veeramuthu, Pohchoo Seow, Vairavan Narayanan, Jeannie Hisu Ding Wong, Li Kuo Tan, Aditya Tri Hernowo, Norlisah Ramli
RATIONALE AND OBJECTIVES: Magnetic resonance spectroscopy is a noninvasive imaging technique that allows for reliable assessment of microscopic changes in brain cytoarchitecture, neuronal injuries, and neurochemical changes resultant from traumatic insults. We aimed to evaluate the acute alteration of neurometabolites in complicated and uncomplicated mild traumatic brain injury (mTBI) patients in comparison to control subjects using proton magnetic resonance spectroscopy (1H magnetic resonance spectroscopy)...
February 12, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29444560/cohort-studies-trials-and-tribulations-systematic-review-and-an-evidence-based-approach-to-avm-treatment
#3
Mary Simons, Michael K Morgan, Andrew S Davidson
INTRODUCTION: There is uncertainty as to the best management of arteriovenous malformations of the brain (bAVM). However, the Spetzler-Martin grade (SMG) has been validated as an effective determinant of surgical risks. We performed a systematic review for the best evidence regarding the management of bAVM for series that incorporate an analysis based upon SMG. EVIDENCE ACQUISITION: Medline, Embase, Scopus and Cochrane databases were searched for series between January 2000 and January 2018, with a minimum of 100 cases and that incorporated SMG stratification...
February 13, 2018: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/29438510/diagnostic-accuracy-of-2-hydroxyglutarate-magnetic-resonance-spectroscopy-in-newly-diagnosed-brain-mass-and-suspected-recurrent-gliomas
#4
Min Zhou, Yue Zhou, Huijun Liao, Benjamin C Rowland, Xiangquan Kong, Nils D Arvold, David A Reardon, Patrick Y Wen, Alexander P Lin, Raymond Y Huang
Background: Isocitrate dehydrogenase (IDH) mutations result in abnormal accumulation of 2-hydroxyglutarate (2HG) in gliomas that can be detected by MRS. We examined the diagnostic accuracy of 2HG single-voxel spectroscopy (SVS) and chemical shift imaging (CSI) in both newly-diagnosed and post-treatment settings. Methods: Long-TE (97 ms) SVS and CSI were acquired in 85 subjects, including a discovery cohort of 39 patients who had postoperative residual or recurrent glioma with confirmed IDH-mutation status and 6 normal volunteers, a prospective preoperative validation cohort of 24 patients with newly-diagnosed brain mass, and a prospective recurrent-lesion validation cohort of 16 previously-treated IDH-mutant glioma patients with suspected tumor recurrence...
February 9, 2018: Neuro-oncology
https://www.readbyqxmd.com/read/29436038/comparison-of-reproducibility-of-single-voxel-spectroscopy-and-whole-brain-magnetic-resonance-spectroscopy-imaging-at-3t
#5
Yue Zhang, Edward Taub, Nouha Salibi, Gitendra Uswatte, Andrew A Maudsley, Sulaiman Sheriff, Brent Womble, Victor W Mark, David C Knight
To date, single voxel spectroscopy (SVS) is the most commonly used MRS technique. SVS is relatively easy to use and provides automated and immediate access to the resulting spectra. However, it is also limited in spatial coverage. A new and very promising MRS technique allows for whole-brain MR spectroscopic imaging (WB-MRSI) with much improved spatial resolution. Establishing the reproducibility of data obtained using SVS and WB-MRSI is an important first step for using these techniques to evaluate longitudinal changes in metabolite concentration...
February 13, 2018: NMR in Biomedicine
https://www.readbyqxmd.com/read/29428932/metabolite-levels-in-paediatric-brain-tumours-correlate-with-histological-features
#6
Eleni Orphanidou-Vlachou, Sarah E Kohe, Marie-Anne Brundler, Lesley MacPherson, Yu Sun, Nigel Davies, Martin Wilson, Xiaoyan Pan, Theodoros N Arvanitis, Richard G Grundy, Andrew C Peet
AIMS: Metabolite levels can be measured non-invasively using in vivo 1H magnetic resonance spectroscopy (MRS). These tumour metabolite profiles are highly characteristic for tumour type in childhood brain tumours; however, the relationship between metabolite values and conventional histopathological characteristics has not yet been fully established. This study systematically tests the relationship between metabolite levels detected by MRS and specific histological features in a range of paediatric brain tumours...
February 10, 2018: Pathobiology: Journal of Immunopathology, Molecular and Cellular Biology
https://www.readbyqxmd.com/read/29428549/importance-of-the-brain-corticosteroid-receptor-balance-in-metaplasticity-cognitive-performance-and-neuro-inflammation
#7
REVIEW
E R de Kloet, O C Meijer, A F de Nicola, R H de Rijk, M Joëls
Bruce McEwen's discovery of receptors for corticosterone in the rat hippocampus introduced higher brain circuits in the neuroendocrinology of stress. Subsequently, these receptors were identified as mineralocorticoid receptors (MRs) that are involved in appraisal processes, choice of coping style, encoding and retrieval. The MR-mediated actions on cognition are complemented by slower actions via glucocorticoid receptors (GRs) on contextualization, rationalization and memory storage of the experience. These sequential phases in cognitive performance depend on synaptic metaplasticity that is regulated by coordinate MR- and GR activation...
February 8, 2018: Frontiers in Neuroendocrinology
https://www.readbyqxmd.com/read/29428249/computed-tomography-perfusion-aids-in-the-prognostication-of-comatose-postcardiac-arrest-patients
#8
Jai Jai Shiva Shankar, Brandie Stewart-Perrin, Ata-Ur-Rehman Quraishi, Iqbal Bata, Robert Vandorpe
Early assessment of the potential for neurologic recovery in comatose cardiac arrest patients (CCAP) has been a challenge despite significant evolution in management and imaging techniques. The purpose of study was to determine if the use of computed tomography perfusion (CTP) in CCAPs is feasible and if this technique can predict the likelihood that CCAPs will have a devastating outcome at hospital discharge. We prospectively enrolled 10 newly admitted comatose adults who had an out-of-hospital cardiac arrest and were treated with standard therapeutic hypothermia protocols...
January 9, 2018: American Journal of Cardiology
https://www.readbyqxmd.com/read/29427395/minimum-echo-time-press-based-proton-observed-carbon-edited-poce-mrs-in-rat-brain-using-simultaneous-editing-and-localization-pulses
#9
Chathura Kumaragamage, Dan Madularu, Axel P Mathieu, Derek Lupinsky, Robin A de Graaf, Jamie Near
PURPOSE: Indirect 13 C MRS by proton-observed carbon editing (POCE) is a powerful method to study brain metabolism. The sensitivity of POCE-MRS can be enhanced through the use of short TEs, which primarily minimizes homonuclear J-evolution related losses; previous POCE-MRS implementations use longer than optimal echo times due to sequence limitations, or short TE image selected in vivo spectroscopy-based multi-shot acquisitions for 3D localization. To that end, this paper presents a novel single-shot point resolved spectroscopy (PRESS)-localized POCE-MRS sequence that involves the application of simultaneous editing and localization pulses (SEAL)-PRESS, allowing the TE to be reduced to a theoretically optimal value of ∼ 1/JHC ...
February 9, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29427382/feasibility-of-in-vivo-measurement-of-glucose-metabolism-in-the-mouse-hypothalamus-by-1-h-13-c-mrs-at-14-1t
#10
Blanca Lizarbe, Hongxia Lei, Joao M N Duarte, Bernard Lanz, Antoine Cherix, Rolf Gruetter
PURPOSE: Determine the feasibility of 1 H-[13 C] MRS in the mouse hypothalamus using a 14.1T magnet. METHODS: We optimized the design of a 1 H-[13 C] surface coil to maximize the signal-to-noise ratio of 1 H-[13 C] MRS in the mouse hypothalamus. With enhanced signal, 13 C accumulation in glucose metabolites was measured in a 8.7 µL voxel in the hypothalamus of 5 healthy mice during the continuous administration of [1,6-13 C2 ]glucose. RESULTS: Accumulation of 13 C label in glucose C6 and lactate C3 was visible in the hypothalamus 11 min after glucose administration...
February 9, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29427295/unveiling-a-hidden-31-p-signal-coresonating-with-extracellular-inorganic-phosphate-by-outer-volume-suppression-and-localized-31-p-mrs-in-the-human-brain-at-7t
#11
Jimin Ren, Ty Shang, A Dean Sherry, Craig R Malloy
PURPOSE: The study was undertaken to demonstrate that there is more than 1 component in the extracellular Pi31 P signal ( Piex) acquired from human head using nonlocalized 31 P MRS. METHODS: Outer-volume-suppression (OVS) saturation and 1D/2D 31 P CSI were utilized to reveal the presence of an additional component in the Piex signal. RESULTS: 67% of the head extracellular Pi signal was attenuated upon OVS saturation of the peripheral meningeal tissues, likely reflecting elimination of the Pi signal in the meningeal fluids (the blood and CSF)...
February 9, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29417580/in-vivo-characterization-of-brain-metabolism-by-1-h-mrs-13-c-mrs-and-18-fdg-pet-reveals-significant-glucose-oxidation-of-invasively-growing-glioma-cells
#12
Marta Lai, Irene Vassallo, Bernard Lanz, Carole Poitry-Yamate, Marie-France Hamou, Cristina Cudalbu, Rolf Gruetter, Monika E Hegi
Glioblastoma are notorious for their highly invasive growth, diffusely infiltrating adjacent brain structures that precludes complete resection, and is a major obstacle for cure. To characterize this "invisible" tumor part, we designed a high resolution multimodal imaging approach assessing in vivo the metabolism of invasively growing glioma xenografts in the mouse brain. Animals were subjected longitudinally to Magnetic Resonance Imaging (MRI) and 1 H spectroscopy (MRS) at ultra high field (14.1 Tesla) that allowed the measurement of 16 metabolic biomarkers to characterize the metabolic profiles...
February 8, 2018: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29417380/assessing-long-term-neuroinflammatory-responses-to-encephalopathy-using-mri-approaches-in-a-rat-endotoxemia-model
#13
Rheal A Towner, D Saunders, N Smith, W Towler, M Cruz, S Do, J E Maher, K Whitaker, M Lerner, K A Morton
Sepsis-associated encephalopathy (SAE) induces neuroinflammation, which is associated with cognitive impairment (CI). CI is also correlated with aging. We used contrast-enhanced magnetic resonance imaging (MRI), perfusion MRI, and MR spectroscopy to assess long-term alterations in BBB permeability, microvascularity, and metabolism, respectively, in a rat lipopolysaccharide-induced SAE model. Free radical-targeted molecular MRI was used to detect brain radical levels at 24 h and 1 week post-LPS injection. CE-MRI showed increased Gd-DTPA uptake in LPS rat brains at 24 h in cerebral cortex, hippocampus, thalamus, and perirhinal cortex regions...
February 7, 2018: GeroScience
https://www.readbyqxmd.com/read/29414126/proton-magnetic-resonance-spectroscopy-changes-after-lithium-treatment-systematic-review
#14
REVIEW
Agata Szulc, Magdalena Wiedlocha, Napoleon Waszkiewicz, Beata Galińska-Skok, Piotr Marcinowicz, Jacek Gierus, Anna Mosiolek
1H MRS is widely used in the research of mental disorders. It enables evaluation of concentration or ratios of several metabolites, which play important roles in brain metabolism: N-acetylaspartate (NAA), choline containing compounds, myo-inositol and glutamate, glutamine and GABA (together as Glx complex or separately). Specifically in bipolar disorder brain metabolite abnormalities include mostly NAA reduces and Glx increases in different brain regions. Bipolar disorder is associated with impairment in neurotrophic and cellular plasticity, resilience pathways and in neuroprotective processes...
January 17, 2018: Psychiatry Research
https://www.readbyqxmd.com/read/29410105/the-catch-mini-stent-retriever-for-mechanical-thrombectomy-in-distal-intracranial-occlusions
#15
Jeremy Hofmeister, Zsolt Kulcsar, Gianmarco Bernava, Alain Pellaton, Hasan Yilmaz, Gorislav Erceg, Maria Isabel Vargas, Karl-Olof Lovblad, Paolo Machi
OBJECTIVE: Mechanical thrombectomy (MTB) is a treatment of reference for acute ischemic stroke due to large brain vessel occlusion but some concerns remain about its use in small distal branches. In the present study, we assessed the efficacy and the safety of distal MTB using the Catch Mini (CM) stent retriever. METHODS: We retrospectively reviewed a prospectively maintained database of all consecutive patients who underwent MTB for a distal intracranial occlusion with the Catch Mini device at our hospital...
February 1, 2018: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/29407539/a-pilot-study-of-minocycline-for-the-treatment-of-bipolar-depression-effects-on-cortical-glutathione-and-oxidative-stress-in-vivo
#16
James W Murrough, Kathryn M Huryk, Xiangling Mao, Brian Iacoviello, Katherine Collins, Andrew A Nierenberg, Guoxin Kang, Dikoma C Shungu, Dan V Iosifescu
BACKGROUND: The antibiotic minocycline appears to promote neuroprotection through antioxidant and other mechanisms that may be relevant to the pathophysiology of bipolar disorder. The present study assessed the efficacy of minocycline in bipolar depression and examined the association between minocycline treatment and brain glutathione (GSH), an essential regulator of oxidative stress. METHOD: Twenty patients with bipolar disorder experiencing acute depressive symptoms enrolled in an 8-week, open-label trial of adjuvant minocycline...
January 2, 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29403418/binge-drinking-and-the-young-brain-a-mini-review-of-the-neurobiological-underpinnings-of-alcohol-induced-blackout
#17
REVIEW
Daniel F Hermens, Jim Lagopoulos
Binge drinking has significant effects on memory, particularly with regards to the transfer of information to long-term storage. Partial or complete blocking of memory formation is known as blackout. Youth represents a critical period in brain development that is particularly vulnerable to alcohol misuse. Animal models show that the adolescent brain is more vulnerable to the acute and chronic effects of alcohol compared with the adult brain. This mini-review addresses the neurobiological underpinnings of binge drinking and associated memory loss (blackout) in the adolescent and young adult period...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29403347/brain-metabolite-diffusion-from-ultra-short-to-ultra-long-time-scales-what-do-we-learn-where-should-we-go
#18
Julien Valette, Clémence Ligneul, Charlotte Marchadour, Chloé Najac, Marco Palombo
In vivo diffusion-weighted MR spectroscopy (DW-MRS) allows measuring diffusion properties of brain metabolites. Unlike water, most metabolites are confined within cells. Hence, their diffusion is expected to purely reflect intracellular properties, opening unique possibilities to use metabolites as specific probes to explore cellular organization and structure. However, interpretation and modeling of DW-MRS, and more generally of intracellular diffusion, remains difficult. In this perspective paper, we will focus on the study of the time-dependency of brain metabolite apparent diffusion coefficient (ADC)...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29400109/evolution-of-the-neurochemical-profiles-in-the-g93a-sod1-mouse-model-of-amyotrophic-lateral-sclerosis
#19
Hongxia Lei, Elisabeth Dirren, Carole Poitry-Yamate, Bernard L Schneider, Rolf Gruetter, Patrick Aebischer
In vivo 1H magnetic resonance spectroscopy (1H-MRS) investigations of amyotrophic lateral sclerosis (ALS) mouse brain may provide neurochemical profiles and alterations in association with ALS disease progression. We aimed to longitudinally follow neurochemical evolutions of striatum, brainstem and motor cortex of mice transgenic for G93A mutant human superoxide dismutase type-1 (G93A-SOD1), an ALS model. Region-specific neurochemical alterations were detected in asymptomatic G93A-SOD1 mice, particularly in lactate (-19%) and glutamate (+8%) of brainstem, along with γ-amino-butyric acid (-30%), N-acetyl-aspartate (-5%) and ascorbate (+51%) of motor cortex...
January 1, 2018: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29393440/serum-containing-gengnianchun-formula-suppresses-amyloid%C3%A2-%C3%AE-%C3%A2-induced-inflammatory-cytokines-in-bv%C3%A2-2-microglial-cells-by-inhibiting-the-nf%C3%A2-%C3%AE%C2%BAb-and-jnk-signaling-pathways
#20
Pin-Li Chen, Wen-Jun Wang, Yan-Qiu Rao, Jun Li, Ming-Jun Cheng
As the resident macrophages of the brain's innate immune system, microglial cells are key modulators in the neurodegenerative disease Alzheimer's disease (AD). In particular, the activation and accumulation of microglial cells around amyloid plaques is considered to result in chronic neuroinflammation. Although the pathologic mechanism remains to be fully elucidated, inflammation has been shown to be critical in the pathogenesis of AD. The Gengnianchun (GNC) formula has long been used to treat perimenopausal syndrome clinically, and is particularly effective in improving learning ability and memory...
January 31, 2018: Molecular Medicine Reports
keyword
keyword
20165
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"