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N-acetylaspartate AND glutamine

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https://www.readbyqxmd.com/read/28203104/proton-magnetic-resonance-spectroscopy-assessment-of-metabolite-status-of-the-anterior-cingulate-cortex-in-chronic-pain-patients-and-healthy-controls
#1
Takahiro Ito, Sachiko Tanaka-Mizuno, Narihito Iwashita, Ikuo Tooyama, Akihiko Shiino, Katsuyuki Miura, Sei Fukui
BACKGROUND: Chronic pain is a common cause of reduced quality of life. Recent studies suggest that chronic pain patients have a different brain neurometabolic status to healthy people. Proton magnetic resonance spectroscopy ((1)H-MRS) can determine the concentrations of metabolites in a specific region of the brain without being invasive. PATIENTS AND METHODS: We recruited 56 chronic pain patients and 60 healthy controls to compare brain metabolic characteristics...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28186661/brain-neurochemical-and-hemodynamic-findings-in-the-ny1dd-mouse-model-of-mild-sickle-cell-disease
#2
Min-Hui Cui, Sandra M Suzuka, Nicholas A Branch, Kamalakar Ambadipudi, Sangeetha Thangaswamy, Seetharama A Acharya, Henny H Billett, Craig A Branch
To characterize the cerebral profile associated with sickle cell disease (SCD), we used in vivo proton MRI and MRS to quantify hemodynamics and neurochemicals in the thalamus of NY1DD mice, a mild model of SCD, and compared them with wild-type (WT) control mice. Compared with WT mice, NY1DD mice at steady state had elevated cerebral blood flow (CBF) and concentrations of N-acetylaspartate (NAA), glutamate (Glu), alanine, total creatine and N-acetylaspartylglutamate. Concentrations of glutathione (GSH) at steady state showed a negative correlation with BOLD signal change in response to 100% oxygen, a marker for oxidative stress, and mean diffusivity assessed using diffusion-tensor imaging, a marker for edematous inflammation...
February 10, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28170180/therapeutic-prospective-of-infused-allogenic-cultured-mesenchymal-stem-cells-in-traumatic-brain-injury-mice-a-longitudinal-proton-magnetic-resonance-spectroscopy-assessment
#3
Sushanta Kumar Mishra, Poonam Rana, Subash Khushu, Gurudutta Gangenahalli
Improved therapeutic assessment of experimental traumatic brain injury (TBI), using mesenchymal stem cells (MSCs), would immensely benefit its therapeutic management. Neurometabolite patterns at injury site, measured with proton magnetic resonance spectroscopy (1H-MRS) after MSCs transplantation, may serve as a bio-indicator of the recovery mechanism. This study used in vivo magnetic resonance imaging and 1H-MRS to evaluate the therapeutic prospects of implanted MSCs at injury site in experimental mice longitudinally up to 21 days...
January 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28170003/brain-volumetric-and-metabolic-correlates-of-electroconvulsive-therapy-for-treatment-resistant-depression-a-longitudinal-neuroimaging-study
#4
M Cano, I Martínez-Zalacaín, Á Bernabéu-Sanz, O Contreras-Rodríguez, R Hernández-Ribas, E Via, A de Arriba-Arnau, V Gálvez, M Urretavizcaya, J Pujol, J M Menchón, N Cardoner, C Soriano-Mas
Recent research suggests that neuroplastic and neuroinflammatory changes may account for the mode of action of electroconvulsive therapy (ECT), although extant data do not allow for a clear disambiguation between these two hypotheses. Multimodal neuroimaging approaches (for example, combining structural and metabolic information) may help in clarifying this issue. Here we aimed to assess longitudinal changes in (i) regional gray matter (GM) volumes and (ii) hippocampal metabolite concentrations throughout an acute course of bitemporal ECT, as well as (iii) to determine the association between imaging changes and clinical improvement...
February 7, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28098946/negative-association-between-mr-spectroscopic-glutamate-markers-and-gray-matter-volume-after-alcohol-withdrawal-in-the-hippocampus-a-translational-study-in-humans-and-rats
#5
Ulrich Frischknecht, Derik Hermann, Nuran Tunc-Skarka, Guo-Ying Wang, Markus Sack, Julia van Eijk, Traute Demirakca, Claudia Falfan-Melgoza, Bertram Krumm, Sandra Dieter, Rainer Spanagel, Falk Kiefer, Karl F Mann, Wolfgang H Sommer, Gabriele Ende, Wolfgang Weber-Fahr
BACKGROUND: Both chronic alcohol consumption and alcohol withdrawal lead to neural tissue damage which partly recovers during abstinence. This study investigated withdrawal-associated changes in glutamatergic compounds, markers of neuronal integrity, and gray matter volumes during acute alcohol withdrawal in the hippocampus, a key region in development and maintenance of alcohol dependence in humans and rats. METHODS: Alcohol-dependent patients (N = 39) underwent magnetic resonance imaging (MRI) and MR spectroscopy (MRS) measurements within 24 hours after the last drink and after 2 weeks of abstinence...
February 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28070703/nmr-based-metabolomics-reveals-brain-region-specific-metabolic-alterations-in-streptozotocin-induced-diabetic-rats-with-cognitive-dysfunction
#6
Hong Zheng, Qiuting Lin, Dan Wang, Pengtao Xu, Liangcai Zhao, Wenyi Hu, Guanghui Bai, Zhihan Yan, Hongchang Gao
Diabetes mellitus (DM) can result in cognitive dysfunction, but its potential metabolic mechanisms remain unclear. In the present study, we analyzed the metabolite profiling in eight different brain regions of the normal rats and the streptozotocin (STZ)-induced diabetic rats accompanied by cognitive dysfunction using a (1)H NMR-based metabolomic approach. A mixed linear model analysis was performed to assess the effects of DM, brain region and their interaction on metabolic changes. We found that different brain regions in rats displayed significant metabolic differences...
January 9, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28058747/towards-a-neurochemical-profile-of-the-amygdala-using-short-te-1-h-magnetic-resonance-spectroscopy-at-3%C3%A2-t
#7
Florian Schubert, Simone Kühn, Jürgen Gallinat, Ralf Mekle, Bernd Ittermann
The amygdala plays a key role in emotional learning and in the processing of emotions. As disturbed amygdala function has been linked to several psychiatric conditions, a knowledge of its biochemistry, especially neurotransmitter levels, is highly desirable. The spin echo full intensity acquired localized (SPECIAL) sequence, together with a transmit/receive coil, was used to perform very short-TE magnetic resonance spectroscopy at 3 T to determine the neurochemical profile in a spectroscopic voxel containing the amygdala in 21 healthy adult subjects...
January 6, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28047652/su-f-sps-07-magnetic-resonance-spectroscopy-findings-in-early-phase-psychosis
#8
A Wright, R Ma, T Hummer, M Francis, N Mehdiyoun, U Dydak, A Breier
PURPOSE: Schizophrenia is a psychiatric disorder characterized by disordered thoughts, abnormal social behaviors, flat affect, and auditory or visual hallucinations. The current study aims to investigate alterations in brain metabolism in patients near the onset of psychosis (early-phase psychosis, EPP), to characterize abnormalities during the early stages of schizophrenia. To this end, we used magnetic resonance imaging (MRI) and spectroscopy (MRS) to measure metabolite levels and subsequently monitor the effect of treatment with N-acetylcysteine (NAC)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28025469/mr-spectroscopy-in-patients-with-hereditary-diffuse-leukoencephalopathy-with-spheroids-and-asymptomatic-carriers-of-colony-stimulating-factor-1-receptor-mutation
#9
Takashi Abe, Toshitaka Kawarai, Koji Fujita, Wataru Sako, Yuka Terasawa, Tsuyoshi Matsuda, Waka Sakai, Ai Tsukamoto-Miyashiro, Naoko Matsui, Yuishin Izumi, Ryuji Kaji, Masafumi Harada
PURPOSE: Hereditary diffuse leukoencephalopathy with spheroids (HDLS) is a rare neurodegenerative disorder with various clinical presentations. Mutation of the colony-stimulating factor 1 receptor (CSF1R) gene is considered to be a cause of this autosomal dominant disorder. The purpose of this study was to report magnetic resonance spectroscopy (MRS) findings in patients with HDLS and asymptomatic carriers and to clarify the use of MRS in this disease. MATERIALS AND METHODS: In this retrospective, institutional review board-approved study, we included four consecutive patients, genetically diagnosed with HDLS, and two asymptomatic carriers after acquiring informed consent...
December 26, 2016: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/27984159/spectroscopy-markers-of-suicidal-risk-and-mental-pain-in-depressed-patients
#10
Fabrice Jollant, Jamie Near, Gustavo Turecki, Stéphane Richard-Devantoy
OBJECTIVE: Suicidal behavior has been associated with structural and functional impairments in neuroimaging studies, mainly localized in the prefrontal cortex. However, little is known of the in vivo biochemical alterations that could be markers of suicidal risk. METHODS: Proton magnetic resonance spectroscopy was used to measure at-rest levels of 9 metabolites (glutamate, glutamine, glutathione, GABA, N-acetylaspartate (NAA), N-acetylaspartylglutamate, myo-inositol, aspartate, total choline), in the right dorsal prefrontal cortex of 25 unmedicated depressed patients, including 15 with a history of suicidal behavior, and 33 healthy controls...
October 27, 2016: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/27909746/brain-glutamate-in-anorexia-nervosa-a-magnetic-resonance-spectroscopy-case-control-study-at-7-tesla
#11
Beata R Godlewska, Alexandra Pike, Ann L Sharpley, Agnes Ayton, Rebecca J Park, Philip J Cowen, Uzay E Emir
RATIONALE: Anorexia nervosa (AN) is a serious psychiatric disorder with high morbidity and mortality. There are no established pharmacological treatments and the neurobiology of the condition is poorly understood. Previous studies using magnetic resonance spectroscopy (MRS) have shown that AN may be associated with reductions in indices of brain glutamate; however, at conventional field strengths (≤3 T), it is difficult to separate glutamate from its precursor and metabolite, glutamine...
February 2017: Psychopharmacology
https://www.readbyqxmd.com/read/27894920/effects-of-repeated-dizocilpine-treatment-on-glutamatergic-activity-in-the-prefrontal-cortex-in-an-animal-model-of-schizophrenia-an-in-vivo-proton-magnetic-resonance-spectroscopy-study-at-9-4t
#12
Chi-Hyeon Yoo, Kyu-Ho Song, Song-I Lim, Do-Wan Lee, Dong-Cheol Woo, Bo-Young Choe
Repeated exposure to dizocilpine (MK-801) can be used as a model of schizophrenia that incorporates disease progression. Proton magnetic resonance spectroscopy ((1)H MRS) has been widely used to investigate schizophrenia-related alterations in glutamate (Glu). The purpose of this study was to investigate metabolic alterations in the prefrontal cortex (PFC) in an animal model of schizophrenia by using in vivo (1)H MRS. Because of the spectral overlap of Glu and glutamine (Gln), high-field (1)H MRS with short echo time (TE) was used...
January 10, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/27869127/main-effects-of-diagnoses-brain-regions-and-their-interaction-effects-for-cerebral-metabolites-in-bipolar-and-unipolar-depressive-disorders
#13
Hai-Zhu Tan, Hui Li, Chen-Feng Liu, Ji-Tian Guan, Xiao-Bo Guo, Can-Hong Wen, Shao-Min Ou, Yin-Nan Zhang, Jie Zhang, Chong-Tao Xu, Zhi-Wei Shen, Ren-Hua Wu, Xue-Qin Wang
Previous studies suggested patients with bipolar depressive disorder (BDd) or unipolar depressive disorder (UDd) have cerebral metabolites abnormalities. These abnormalities may stem from multiple sub-regions of gray matter in brain regions. Thirteen BDd patients, 20 UDd patients and 20 healthy controls (HC) were enrolled to investigate these abnormalities. Absolute concentrations of 5 cerebral metabolites (glutamate-glutamine (Glx), N-acetylaspartate (NAA), choline (Cho), myo-inositol (mI), creatine (Cr), parietal cortex (PC)) were measured from 4 subregions (the medial frontal cortex (mPFC), anterior cingulate cortex (ACC), posterior cingulate cortex (PCC), and parietal cortex (PC)) of gray matter...
November 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27847932/neurochemical-alterations-in-anterior-cingulate-cortex-in-bipolar-disorder-a-proton-magnetic-resonance-spectroscopy-study-1h-mrs
#14
Beata Galińska-Skok, Beata Konarzewska, Bożena Kubas, Eugeniusz Tarasów, Agata Szulc
OBJECTIVES: The aim of this study was to determine neurochemical alterations in bipolar disorder using proton magnetic resonance spectroscopy (1H-MRS). METHODS: We investigated a group of 27 patients diagnosed with bipolar disorder (with manic and mixed episodes, depression and after remission of symptoms) and 10 healthy subjects. MR imaging and 1H-MRS were performed on a 1.5 T scanner. Voxels of 8 cm3 were positioned in the anterior cingulate, left frontal lobe and left temporal lobe...
2016: Psychiatria Polska
https://www.readbyqxmd.com/read/27816519/cognitive-decline-in-type-2-diabetic-db-db-mice-may-be-associated-with-brain-region-specific-metabolic-disorders
#15
Hong Zheng, Yongquan Zheng, Liangcai Zhao, Minjiang Chen, Guanghui Bai, Yongsheng Hu, Wenyi Hu, Zhihan Yan, Hongchang Gao
Type 2 diabetes has been associated with cognitive decline, but its metabolic mechanism remains unclear. In the present study, we attempted to investigate brain region-specific metabolic changes in db/db mice with cognitive decline and explore the potential metabolic mechanism linking type 2 diabetes and cognitive decline. We analyzed the metabolic changes in seven brain regions of two types of mice (wild-type mice and db/db mice with cognitive decline) using a (1)H NMR-based metabolomic approach. Then, a mixed-model analysis was used to evaluate the effects of mice type, brain region, and their interaction on metabolic changes...
January 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27797114/diffusion-weighted-j-resolved-spectroscopy
#16
Karl Landheer, Rolf Schulte, Ben Geraghty, Christopher Hanstock, Albert P Chen, Charles H Cunningham, Simon J Graham
PURPOSE: To develop a novel diffusion-weighted magnetic resonance spectroscopy (DW-MRS) technique in conjunction with J-resolved spatially localized spectroscopy (JPRESS) to measure the apparent diffusion coefficients (ADCs) of brain metabolites beyond N-acetylaspartic acid (NAA), creatine (Cr), and choline (Cho) at 3T. This technique will be useful to probe tissue microstructures in vivo, as the various metabolites have different physiological characteristics. METHODS: Two JPRESS spectra were collected (high b-value and low b-value), and the ADCs of 16 different metabolites were estimated...
October 31, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27772535/1h-magnetic-resonance-spectroscopy-evidence-for-occipital-involvement-in-treatment-naive-paediatric-obsessive-compulsive-disorder
#17
Maria Ljungberg, Marie K L Nilsson, Karin Melin, Lars Jönsson, Arvid Carlsson, Åsa Carlsson, Eva Forssell-Aronsson, Tord Ivarsson, Maria Carlsson, Göran Starck
OBJECTIVE: Obsessive-compulsive disorder (OCD) is a chronic psychiatric disorder leading to considerable distress and disability. Therapies are effective in a majority of paediatric patients, however, many only get partial response. It is therefore important to study the underlying pathophysiology of the disorder. METHODS: 1H magnetic resonance spectroscopy (MRS) was used to study the concentration of brain metabolites in four different locations (cingulate gyrus and sulcus, occipital cortex, thalamus and right caudate nucleus)...
October 24, 2016: Acta Neuropsychiatrica
https://www.readbyqxmd.com/read/27748207/metabolic-abnormality-in-the-right-dorsolateral-prefrontal-cortex-in-patients-with-obsessive-compulsive-disorder-proton-magnetic-resonance-spectroscopy
#18
Shin-Eui Park, Nam-Gil Choi, Gwang-Woo Jeong
OBJECTIVE: Proton magnetic resonance spectroscopy (1H-MRS) was used to evaluate metabolic changes in the dorsolateral prefrontal cortex (DLPFC) in patients with obsessive-compulsive disorder (OCD). METHODS: In total, 14 OCD patients (mean age 28.9±7.2 years) and 14 healthy controls (mean age 32.6±7.1 years) with no history of neurological and psychiatric illness participated in this study. Brain metabolite concentrations were measured from a localised voxel on the right DLPFC using a 3-Tesla 1H-MRS...
October 17, 2016: Acta Neuropsychiatrica
https://www.readbyqxmd.com/read/27718422/low-episodic-memory-performance-in-cognitively-normal-elderly-subjects-is-associated-with-increased-posterior-cingulate-gray-matter-n-acetylaspartate-a-1-h-mrsi-study-at-7%C3%A2-tesla
#19
Simon J Schreiner, Thomas Kirchner, Michael Wyss, Jiri M G Van Bergen, Frances C Quevenco, Stefanie C Steininger, Erica Y Griffith, Irene Meier, Lars Michels, Anton F Gietl, Sandra E Leh, Adam M Brickman, Christoph Hock, Roger M Nitsch, Klaas P Pruessmann, Anke Henning, Paul G Unschuld
Low episodic memory performance characterizes elderly subjects at increased risk for Alzheimer's disease (AD) and may reflect neuronal dysfunction within the posterior cingulate cortex and precuneus (PCP) region. To investigate a potential association between cerebral neurometabolism and low episodic memory in the absence of cognitive impairment, tissue-specific magnetic resonance spectroscopic imaging at ultrahigh field strength of 7 Tesla was used to investigate the PCP region in a healthy elderly study population (n = 30, age 70 ± 5...
December 2016: Neurobiology of Aging
https://www.readbyqxmd.com/read/27702600/evaluation-of-neuron-glia-integrity-by-in-vivo-proton-magnetic-resonance-spectroscopy-implications-for-psychiatric-disorders
#20
REVIEW
Haiyun Xu, Handi Zhang, Jie Zhang, Qingjun Huang, Zhiwei Shen, Renhua Wu
Proton magnetic resonance spectroscopy ((1)H-MRS) has been widely applied in human studies. There is now a large literature describing findings of brain MRS studies with mental disorder patients including schizophrenia, bipolar disorder, major depressive disorder, and anxiety disorders. However, the findings are mixed and cannot be reconciled by any of the existing interpretations. Here we proposed the new theory of neuron-glia integrity to explain the findings of brain (1)H-MRS stuies. It proposed the neurochemical correlates of neuron-astrocyte integrity and axon-myelin integrity on the basis of update of neurobiological knowledge about neuron-glia communication and of experimental MRS evidence for impairments in neuron-glia integrity from the authors and the other investigators...
December 2016: Neuroscience and Biobehavioral Reviews
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