Article
Neurosciences
Tal Finkelman, Edna Furman-Haran, Rony Paz, Assaf Tal
Summary: The article discusses methods for evaluating the excitatory-inhibitory balance at 7T, comparing edited and non-edited strategies. It was found that non-edited sequences at an echo time of 80 ms provide better reproducibility than either edited sequences at the same TE, or non-edited sequences at a shorter TE of 42 ms. This is supported by numerical simulations.
Article
Clinical Neurology
Gwenn S. Smith, Georg Oeltzschner, Neda F. Gould, Jeannie-Marie S. Leoutsakos, Najilla Nassery, Jin Hui Joo, Michael A. Kraut, Richard A. E. Edden, Peter B. Barker, S. Andrea Wijtenburg, Laura M. Rowland, Clifford Workman
Summary: The study utilized 7T high field strengths in LLD patients for MRS research, finding that levels of neurotransmitters dropped in some patients after antidepressant treatment, while NAA levels in the PCC were lower in LLD patients compared to controls.
JOURNAL OF AFFECTIVE DISORDERS
(2021)
Article
Health Care Sciences & Services
Gen Yan, Meizhi Yi, Shengkai Li, Lin Yang, Zhuozhi Dai, Yinghua Xuan, Renhua Wu
Summary: This study revealed that inositol, taurine, and glutamate/glutamine have the potential to provide specific biomarkers for the location of tumor peripheral of glioma.
TECHNOLOGY AND HEALTH CARE
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Yannik Voelzke, Eberhard D. Pracht, Elke Hattingen, Desmond H. Y. Tse, Tony Stoecker
Summary: This study aimed to improve the reproducibility of hippocampal GABA+ MRS by carefully adjusting quantification parameters and establishing a dedicated pre-processing approach. Achieving a low inter-subject coefficient of variation of GABA+/total creatine, the study also found that in addition to spectral registration, eddy current compensation and additional difference artifact suppression played important roles in enhancing reproducibility.
MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE
(2021)
Article
Neurosciences
Claire Shyu, Sonja Elsaid, Peter Truong, Sofia Chavez, Bernard Le Foll
Summary: This study investigates the reproducibility of metabolite measurements in the insula using MRS on a 3T scanner, comparing different scanning sequences. The results show that MEGA-PRESS can reliably measure standard metabolites and GABA in the insula, with voxel placement inconsistencies not affecting reproducibility and no sex differences found.
Review
Psychiatry
Amanda Kiemes, Cathy Davies, Matthew J. Kempton, Paulina B. Lukow, Carly Bennallick, James M. Stone, Gemma Modinos
Summary: This study conducted a systematic review and meta-analysis to explore the relationship between H-1-MRS glutamate and/or GABA levels and task-related fMRI signals in the healthy brain. Negative associations were found between local GABA levels and fMRI activation to visual tasks in the occipital lobe, and to emotion processing in the medial prefrontal cortex/ anterior cingulate cortex, while no significant association was found between mPFC/ACC glutamate levels and fMRI activation. Additionally, the review revealed negative associations between GABA levels and local brain activity, and positive associations between glutamate levels and distal brain activity, outside of the H-1-MRS sampling region.
FRONTIERS IN PSYCHIATRY
(2021)
Article
Psychiatry
Ines Bernardino, Ana Dionisio, Ines R. Violante, Raquel Monteiro, Miguel Castelo-Branco
Summary: Excitatory/inhibitory imbalance has been suggested as a neurobiological substrate of the cognitive symptomatology in Autism Spectrum Disorder (ASD). A study using a comprehensive approach combining MRS and TMS techniques found increased Glx levels and unchanged GABA+ levels in ASD adults. Additionally, exploratory TMS experiments revealed impaired inhibition in ASD. The study highlights the need for larger-scale investigations of the GABA system in ASD.
FRONTIERS IN PSYCHIATRY
(2022)
Article
Nutrition & Dietetics
Karen Savage, Jerome Sarris, Matthew Hughes, Chad A. Bousman, Susan Rossell, Andrew Scholey, Con Stough, Chao Suo
Summary: This study investigated the effects of Kava on central GABA levels in participants with GAD. The results showed that compared to the placebo group, the Kava group had a significant reduction in dACC GABA levels after eight weeks. The study also found a positive correlation between baseline anxiety scores and GABA levels. These findings suggest that dACC GABA levels could serve as a biomarker for diagnosis and treatment response in GAD.
Article
Neurosciences
George Zacharopoulos, Francesco Sella, Kathrin Cohen Kadosh, Uzay Emir, Roi Cohen Kadosh
Summary: This study investigated the relationship between test anxiety and the glutamate/GABA balance using magnetic resonance spectroscopy. The results showed that the glutamate/GABA balance is associated with current test anxiety levels and can predict future test anxiety. This relationship was observed during early childhood but not during later developmental stages.
Article
Clinical Neurology
Sarah Caldwell, Douglas L. Rothman
Summary: This review highlights the importance of H-1-MRS technology in identifying specific biomarkers for ALS and monitoring disease progression. The findings suggest that an increase in neuronal glutamate concentration and a decrease in GABA levels may be specific pathophysiological features of ALS, which could enhance the specificity of H-1-MRS detection and monitoring of ALS progression. Additional longitudinal studies are needed to further validate these findings and understand changes in ratios over time.
FRONTIERS IN NEUROLOGY
(2021)
Article
Neuroimaging
Gerrit L. J. Onderwater, Jannie P. Wijnen, Chloe Najac, Robin M. van Dongen, Itamar Ronen, Andrew Webb, Ronald Zielman, Erik W. van Zwet, Michel D. Ferrari, Hermien E. Kan, Mark C. Kruit, Gisela M. Terwindt
Summary: Enhanced activity of the glutamatergic system may be involved in the pathophysiology of migraines. This study used high- resolution 7T MR spectroscopy to show changes in the glutamatergic system during a migraine attack, with an increase in GABA concentration observed in migraine patients compared to healthy controls.
NEUROIMAGE-CLINICAL
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Yiqi Hu, Qilan Hu, Chenao Zhan, Ting Yin, Tao Ai
Summary: This study investigated the intraobserver and interobserver reproducibility of diffusion-weighted imaging (DWI) measurements, diffusion-kurtosis imaging (DKI) parameters, and image quality evaluation in breast lesions between single-shot echo-planar imaging (ss-EPI) and readout-segmented echo-planar imaging (rs-EPI). The results showed that compared to ss-EPI, rs-EPI had higher intraobserver and interobserver reproducibility for quantitative diffusion-related parameters and image quality assessments.
JOURNAL OF MAGNETIC RESONANCE IMAGING
(2023)
Article
Multidisciplinary Sciences
Thomas Elgeti, Matthias Frohlich, Kim Kathrin Wismayer, Heiko Tzschatzsch, Bernd Hamm, Ingolf Sack, Lars-Arne Schaafs
Summary: This study compares the stiffness of the abdominal aortic wall between smokers and non-smokers using ultrasound time-harmonic elastography (THE). The results show that smokers have significantly higher abdominal aortic wall stiffness, indicating that THE is sensitive to subclinical aortic stiffening in smokers before morphological changes occur.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
Haidong Li, Xiuchao Zhao, Yujin Wang, Xin Lou, Shizhen Chen, He Deng, Lei Shi, Junshuai Xie, Dazhong Tang, Jianping Zhao, Louis-S Bouchard, Liming Xia, Xin Zhou
Summary: The recovery process of COVID-19 patients remains unclear, with some experiencing ongoing respiratory issues. Xe-129 MRI analysis reveals higher ventilation defects and longer gas-blood exchange time in COVID-19 patients, indicating lung function impairment during recovery.
Article
Neurosciences
Caroline A. Lea-Carnall, Wael El-Deredy, Charlotte J. Stagg, Stephen R. Williams, Nelson J. Trujillo-Barreto
Summary: Advances in fMRS have allowed for quantification of neurotransmitter changes, but the underlying physiological processes remain unclear. This study uses computational modeling to propose a mechanism for the observed changes in GABA and glutamate concentrations. The model suggests that fMRS detects shifts in neurotransmitter concentrations as they cycle between different pools. Simulations from the model correspond to empirical fMRS data and predict a selective control mechanism for the GABA/glutamate relationship. This study bridges the gap between neural dynamics and fMRS and highlights the importance of echo-time as a timing parameter.
Article
Neurosciences
S. Andrea Wijtenburg, Susan N. Wright, Stephanie A. Korenic, Frank E. Gaston, Nkemdilim Ndubuizu, Joshua Chiappelli, Robert P. McMahon, Hongji Chen, Anya Savransky, Xiaoming Du, Danny J. J. Wang, Peter Kochunov, L. Elliot Hong, Laura M. Rowland
NEUROPSYCHOPHARMACOLOGY
(2017)
Article
Neurosciences
Xiaoming Du, Fow-Sen Choa, Ann Summerfelt, Laura M. Rowland, Joshua Chiappelli, Peter Kochunov, L. Elliot Hong
EXPERIMENTAL BRAIN RESEARCH
(2017)
Article
Psychiatry
Joshua Chiappelli, Qiaoyun Shi, Sarah Andrea Wijtenburg, Raimi Quiton, Krista Wisner, Frank Gaston, Priyadurga Kodi, Christopher Gaudiot, Peter Kochunov, Laura M. Rowland, Liyi Elliot Hong
SCHIZOPHRENIA BULLETIN
(2018)
Article
Psychiatry
Krishna C. Puvvada, Ann Summerfelt, Xiaoming Du, Nithin Krishna, Peter Kochunov, Laura M. Rowland, Jonathan Z. Simon, L. Elliot Hong
SCHIZOPHRENIA BULLETIN
(2018)
Editorial Material
Psychiatry
William T. Carpenter, Paul D. Shepard, Laura M. Rowland, Janet L. Smith
SCHIZOPHRENIA BULLETIN
(2018)
Article
Psychiatry
Ana Pocivavsek, Laura M. Rowland
SCHIZOPHRENIA BULLETIN
(2018)
Editorial Material
Neurosciences
Laura M. Rowland, S. Andrea Wijtenburg
BIOLOGICAL PSYCHIATRY
(2018)
Article
Neurosciences
Xiaoming Du, Fow-Sen Choa, Joshua Chiappelli, Krista M. Wisner, George Wittenberg, Bhim Adhikari, Heather Bruce, Laura M. Rowland, Peter Kochunov, L. Elliot Hong
BIOLOGICAL PSYCHIATRY
(2019)
Article
Clinical Neurology
Xiaoming Du, Laura M. Rowland, Ann Summerfelt, Andrea Wijtenburg, Joshua Chiappelli, Krista Wisner, Peter Kochunov, Fow-Sen Choa, L. Elliot Hong
Article
Neurosciences
Xiaoming Du, Laura M. Rowland, Ann Summerfelt, Fow-Sen Choa, George F. Wittenberg, Krista Wisner, Andrea Wijtenburg, Joshua Chiappelli, Peter Kochunov, L. Elliot Hong
Article
Radiology, Nuclear Medicine & Medical Imaging
S. Andrea Wijtenburg, Jamie Near, Stephanie A. Korenic, Frank E. Gaston, Hongji Chen, Mark Mikkelsen, Shuo Chen, Peter Kochunov, L. Elliot Hong, Laura M. Rowland
JOURNAL OF MAGNETIC RESONANCE IMAGING
(2019)
Article
Biochemical Research Methods
Meghann C. Ryan, Paul Sherman, Laura M. Rowland, S. Andrea Wijtenburg, Ashley Acheson, Els Fieremans, Jelle Veraart, Dmitry S. Novikov, L. Elliot Hong, John Sladky, P. Dana Peralta, Peter Kochunov, Stephen A. McGuire
JOURNAL OF NEUROSCIENCE METHODS
(2018)
Article
Neurosciences
Joshua Chiappelli, Laura M. Rowland, Francesca M. Notarangelo, S. Andrea Wijtenburg, Marian A. R. Thomas, Ana Pocivavsek, Aaron Jones, Krista Wisner, Peter Kochunov, Robert Schwarcz, L. Elliot Hong
NEUROPSYCHOPHARMACOLOGY
(2018)
Article
Neurosciences
Joshua Chiappelli, Francesca M. Notarangelo, Ana Pocivavsek, Marian A. R. Thomas, Laura M. Rowland, Robert Schwarcz, L. Elliot Hong
NEUROPSYCHOPHARMACOLOGY
(2018)
Article
Biochemical Research Methods
Meghann C. Ryan, Peter Kochunov, Paul M. Sherrnan, Laura M. Rowland, S. Andrea Wijtenburg, Ashley Acheson, L. Elliot Hong, John Sladky, Stephen McGuire
JOURNAL OF NEUROSCIENCE METHODS
(2018)