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gamma-aminobutyric acid

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https://www.readbyqxmd.com/read/28078203/catatonia-our-current-understanding-of-its-diagnosis-treatment-and-pathophysiology
#1
REVIEW
Sean A Rasmussen, Michael F Mazurek, Patricia I Rosebush
Catatonia is a psychomotor syndrome that has been reported to occur in more than 10% of patients with acute psychiatric illnesses. Two subtypes of the syndrome have been identified. Catatonia of the retarded type is characterized by immobility, mutism, staring, rigidity, and a host of other clinical signs. Excited catatonia is a less common presentation in which patients develop prolonged periods of psychomotor agitation. Once thought to be a subtype of schizophrenia, catatonia is now recognized to occur with a broad spectrum of medical and psychiatric illnesses, particularly affective disorders...
December 22, 2016: World Journal of Psychiatry
https://www.readbyqxmd.com/read/28073605/comprehensive-association-analysis-of-27-genes-from-the-gabaergic-system-in-japanese-individuals-affected-with-schizophrenia
#2
Shabeesh Balan, Kazuo Yamada, Yoshimi Iwayama, Takanori Hashimoto, Tomoko Toyota, Chie Shimamoto, Motoko Maekawa, Shu Takagai, Tomoyasu Wakuda, Yosuke Kameno, Daisuke Kurita, Kohei Yamada, Mitsuru Kikuchi, Tasuku Hashimoto, Nobuhisa Kanahara, Takeo Yoshikawa
Involvement of the gamma-aminobutyric acid (GABA)-ergic system in schizophrenia pathogenesis through disrupted neurodevelopment has been highlighted in numerous studies. However, the function of common genetic variants of this system in determining schizophrenia risk is unknown. We therefore tested the association of 375 tagged SNPs in genes derived from the GABAergic system, such as GABAA receptor subunit genes, and GABA related genes (glutamate decarboxylase genes, GABAergic-marker gene, genes involved in GABA receptor trafficking and scaffolding) in Japanese schizophrenia case-control samples (n=2926; 1415 cases and 1511 controls)...
January 7, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28068943/a-case-of-gabar-antibodies-in-schizophrenia
#3
Ida S Haussleiter, Klaus-Peter Wandinger, Georg Juckel
BACKGROUND: In the last couple of years, schizophrenia was often discussed as autoimmune disease. Several antibodies were suspected, but so far there has been no proof of Gamma-aminobutyric acid (GABA) receptor antibodies in patients with schizophrenia. CASE PRESENTATION: In this case report we present a 21-year old woman with schizophrenic symptoms, who showed anti-GABAB1 antibodies when screened by a vast recombinant neurology mosaic on Human Embryonic Kidney Cells 293 (HEK293) cells...
January 10, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28067943/gamma-aminobutyric-acid-gaba-modulators-for-amyotrophic-lateral-sclerosis-motor-neuron-disease
#4
REVIEW
Andrea Diana, Rita Pillai, Paolo Bongioanni, Aidan G O'Keeffe, Robert G Miller, Dan H Moore
BACKGROUND: Imbalance of gamma aminobutyric acid (GABA) and related modulators has been implicated as an important factor in the pathogenesis of amyotrophic lateral sclerosis (ALS), which is also known as motor neuron disease (MND). In this context, the role and mechanism of action of gabapentin and baclofen have been extensively investigated, although with conflicting results. This is the first systematic review to assess clinical trials of GABA modulators for the treatment of ALS. OBJECTIVES: To examine the efficacy of gabapentin, baclofen, or other GABA modulators in delaying the progression of ALS, and to evaluate adverse effects of these interventions...
January 9, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28067785/relationships-between-gat1-and-ptsd-depression-and-substance-use-disorder
#5
Kaitlin E Bountress, Wei Wei, Christina Sheerin, Dongjun Chung, Ananda B Amstadter, Howard Mandel, Zhewu Wang
Post-traumatic stress disorder (PTSD), Major Depressive Disorder (MDD), and Substance Use Disorder (SUD) have large public health impacts. Therefore, researchers have attempted to identify those at greatest risk for these phenotypes. PTSD, MDD, and SUD are in part genetically influenced. Additionally, genes in the glutamate and gamma-aminobutyric acid (GABA) system are implicated in the encoding of emotional and fear memories, and thus may impact these phenotypes. The current study examined the associations of single nucleotide polymorphisms in GAT1 individually, and at the gene level, using a principal components (PC) approach, with PTSD, PTSD comorbid with MDD, and PTSD comorbid with SUD in 486 combat-exposed veterans...
January 5, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28067044/physiology-oriented-engineering-strategy-to-improve-gamma-aminobutyrate-production-in-lactobacillus-brevis
#6
Chang-Jiang Lyu, Wei-Rui Zhao, Sheng Hu, Jun Huang, Tao Lu, Zhi-Hua Jin, Le-He Mei, Shan-Jing Yao
Gamma-aminobutyrate (GABA) is an important chemical in the pharmaceutical field. GABA-producing lactic acid bacteria (LAB) offer the opportunity of developing this health-oriented product. In this study, the gadA, gadB, gadC, gadCB, and gadCA gene segments of Lactobacillus brevis were cloned into pMG36e, and strain Lb. brevis/pMG36e-gadA was selected for thorough characterization in terms of GABA production after analysis of GAD activities. Subsequently, a physiology-oriented engineering strategy was adopted to construct an FoF1-ATPase deficient strain NRA6 with higher GAD activity...
January 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28066142/participation-of-central-gabaa-receptors-in-the-trigeminal-processing-of-mechanical-allodynia-in-rats
#7
Min Ji Kim, Young Hong Park, Kui Ye Yang, Jin Sook Ju, Yong Chul Bae, Seong Kyu Han, Dong Kuk Ahn
Here we investigated the central processing mechanisms of mechanical allodynia and found a direct excitatory link with low-threshold input to nociceptive neurons. Experiments were performed on male Sprague-Dawley rats weighing 230-280 g. Subcutaneous injection of interleukin 1 beta (IL-1β) (1 ng/10 µL) was used to produce mechanical allodynia and thermal hyperalgesia. Intracisternal administration of bicuculline, a gamma aminobutyric acid A (GABAA) receptor antagonist, produced mechanical allodynia in the orofacial area under normal conditions...
January 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28056803/de-novo-transcriptome-and-expression-profile-analyses-of-the-asian-corn-borer-ostrinia-furnacalis-reveals-relevant-flubendiamide-response-genes
#8
Li Cui, Changhui Rui, Daibin Yang, Zhenying Wang, Huizhu Yuan
BACKGROUND: The Asian corn borer (ACB), Ostrinia furnacalis (Guenée), has become the most damaging insect pest of corn in Asia. However, the lack of genome or transcriptome information heavily hinders our further understanding of ACB in every aspect at a molecular level and on a genome-wide scale. Here, we used the Ion Torrent Personal Genome Machine (PGM) Sequencer to explore the ACB transcriptome and to identify relevant genes in response to flubendiamide, showing high selective activity against ACB...
January 5, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28056730/synthesis-molecular-docking-and-evaluation-of-3-4-2-amino-4-substitutedphenyl-2h-1-3-oxazin-thiazin-6-yl-2-phenyl-3h-quinazolin-4-one-derivatives-for-their-anticonvulsant-activity
#9
Nimisha Jain, Jugnu Jaiswal, Ashish Pathak, Pradeep Kumar Singour
BACKGROUND: According to World Health Organization (WHO), around 50 million people worldwide suffering from epilepsy. Therefore, continued search for safer and more effective anticonvulsants is urgently necessary. OBJECTIVES: The present work was to synthesize 2-phenyl substituted quiazolinone derivatives and to evaluate them for anticonvulsant activity and neurotoxic. METHODS: A series of novel 3-{4-[2-amino-4-(substitutedphenyl)-2H-[1.3] oxazin/thiazin-6-yl} 2-phenyl-3H-quinazolin-4-one derivatives were synthesized and evaluated for their anticonvulsant activity...
January 4, 2017: Central Nervous System Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/28049417/assessing-segmental-versus-non-segmental-features-in-the-ventral-nervous-system-of-onychophorans-velvet-worms
#10
Christine Martin, Vladimir Gross, Hans-Joachim Pflüger, Paul A Stevenson, Georg Mayer
BACKGROUND: Due to their phylogenetic position as one of the closest arthropod relatives, studies of the organisation of the nervous system in onychophorans play a key role for understanding the evolution of body segmentation in arthropods. Previous studies revealed that, in contrast to the arthropods, segmentally repeated ganglia are not present within the onychophoran ventral nerve cords, suggesting that segmentation is either reduced or might be incomplete in the onychophoran ventral nervous system...
January 3, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28043063/investigation-of-neuronal-auto-antibodies-in-systemic-lupus-erythematosus-patients-with-epilepsy
#11
Zerrin Karaaslan, Esme Ekizoğlu, Pınar Tektürk, Ece Erdağ, Erdem Tüzün, Nerses Bebek, Candan Gürses, Betül Baykan
PURPOSE: Epilepsy is an important feature for neuropsychiatric involvement in systemic lupus erythematosus (SLE) with unknown mechanism. Our aim was to investigate the presence of neuronal auto-antibodies (NAbs) in neuropsychiatric SLE (NPSLE). METHODS: Eighteen SLE patients (17 females, 1 male) experiencing recurrent seizures were enrolled to this study. Their clinical characteristics, EEG and MRI findings and follow-up information were evaluated from their files...
December 14, 2016: Epilepsy Research
https://www.readbyqxmd.com/read/28040324/metabolomics-and-lipidomics-analyses-by-1-h-nuclear-magnetic-resonance-of-schizophrenia-patient-serum-reveal-potential-peripheral-biomarkers-for-diagnosis
#12
Ljubica Tasic, João G M Pontes, Michelle S Carvalho, Guilherme Cruz, Carolines Dal Mas, Sumit Sethi, Mariana Pedrini, Lucas B Rizzo, Maiara Zeni-Graiff, Elson Asevedo, Acioly L T Lacerda, Rodrigo A Bressan, Ronei Jesus Poppi, Elisa Brietzke, Mirian A F Hayashi
Using (1)H NMR-based metabolomics in association to chemometrics analysis, we analyzed here the metabolic differences between schizophrenia patients (SCZ) compared to healthy controls (HCs). HCs and SCZ patients underwent clinical interview using the Structured Clinical Interview for DSM Disorders (SCID). SCZ patients were further assessed by Positive and Negative Syndrome Scale (PANSS), Calgary Depression Scale, Global Assessment of Functioning Scale (GAF), and Clinical Global Impressions Scale (CGI). Using the principal component analysis (PCA) and supervised partial least-squares discriminate analysis (PLS-DA) in obtained NMR data, a clear group separation between HCs and SCZ patients was achieved...
December 28, 2016: Schizophrenia Research
https://www.readbyqxmd.com/read/28032468/three-dimensional-culture-of-single-embryonic-stem-derived-neural-stem-progenitor-cells-in-fibrin-hydrogels-neuronal-network-formation-and-matrix-remodelling
#13
Ana R Bento, Pedro Quelhas, Maria J Oliveira, Ana P Pêgo, Isabel F Amaral
In an attempt to improve the efficacy of neural stem/progenitor cell (NSPC) based therapies, fibrin hydrogels are being explored to provide a favourable microenvironment for cell survival and differentiation following transplantation. In the present work, the ability of fibrin to support the survival, proliferation, and neuronal differentiation of NSPCs derived from embryonic stem (ES) cells under monolayer culture was explored. Single mouse ES-NSPCs were cultured within fibrin (fibrinogen concentration: 6 mg/ml) under neuronal differentiation conditions up to 14 days...
December 29, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28025130/high-and-ultra-high-resolution-metabolite-mapping-of-the-human-brain-using-1-h-fid-mrsi-at-9-4t
#14
Sahar Nassirpour, Paul Chang, Anke Henning
Magnetic resonance spectroscopic imaging (MRSI) is a promising technique for mapping the spatial distribution of multiple metabolites in the human brain. These metabolite maps can be used as a diagnostic tool to gain insight into several biochemical processes and diseases in the brain. In comparison to lower field strengths, MRSI at ultra-high field strengths benefits from a higher signal to noise ratio (SNR) as well as higher chemical shift dispersion, and hence spectral resolution. This study combines the benefits of an ultra-high field magnet with the advantages of an ultra-short TE and TR single-slice FID-MRSI sequence (such as negligible J-evolution and loss of SNR due to T2 relaxation effects) and presents the first metabolite maps acquired at 9...
December 23, 2016: NeuroImage
https://www.readbyqxmd.com/read/28011073/behavioral-effects-and-neuroanatomical-targets-of-acute-atrazine-exposure-in-the-male-sprague-dawley-rat
#15
V M Rodriguez, M S Mendoza-Trejo, I Hernandez-Plata, M Giordano
Atrazine (ATR) is an herbicide broadly used in the world to control weeds in corn and sorghum fields, and it is potentially toxic for the dopaminergic system. Alterations in dopaminergic markers after ATR administration in rats and C57BL/6 mice have been reported. Behaviorally, it has been observed that ATR exposure causes hypoactivity shortly after its administration. To understand how acute ATR administration induces hypoactivity, we set out to map the brain areas responsive to ATR using c-Fos as a marker of neuronal activity, and tyrosine hydroxylase (TH) as a marker of dopaminergic neurons...
December 21, 2016: Neurotoxicology
https://www.readbyqxmd.com/read/28009283/calcium-imaging-reveals-coordinated-simple-spike-pauses-in-populations-of-cerebellar-purkinje-cells
#16
Jorge E Ramirez, Brandon M Stell
The brain's control of movement is thought to involve coordinated activity between cerebellar Purkinje cells. The results reported here demonstrate that somatic Ca(2+) imaging is a faithful reporter of Na(+)-dependent "simple spike" pauses and enables us to optically record changes in firing rates in populations of Purkinje cells in brain slices and in vivo. This simultaneous calcium imaging of populations of Purkinje cells reveals a striking spatial organization of pauses in Purkinje cell activity between neighboring cells...
December 20, 2016: Cell Reports
https://www.readbyqxmd.com/read/28008690/heavy-alcohol-use-in-adolescence-is-associated-with-altered-cortical-activity-a-combined-tms-eeg-study
#17
Outi Kaarre, Elisa Kallioniemi, Mervi Könönen, Tommi Tolmunen, Virve Kekkonen, Petri Kivimäki, Noora Heikkinen, Florinda Ferreri, Eila Laukkanen, Sara Määttä
Long-term alcohol use affects cognitive and neurophysiological functioning as well as structural brain development. Combining simultaneous electroencephalogram (EEG) recording with transcranial magnetic stimulation (TMS) enables direct, in vivo exploration of cortical excitability and assessment of effective and functional connectivity. In the central nervous system, the effects of alcohol are particularly mediated by alterations in gamma-aminobutyric acid (GABA)ergic neurotransmission, and TMS-evoked potentials (TEPs) N45 and N100 in EEG are known to reflect GABAergic function...
December 23, 2016: Addiction Biology
https://www.readbyqxmd.com/read/27994987/preventative-and-therapeutic-effects-of-a-gaba-transporter-1-inhibitor-administered-systemically-in-a-mouse-model-of-paclitaxel-induced-neuropathic-pain
#18
Willias Masocha, Subramanian S Parvathy
BACKGROUND: There is a dearth of drugs to manage a dose-limiting painful peripheral neuropathy induced by paclitaxel in some patients during the treatment of cancer. Gamma-aminobutyric acid transporter-1 (GAT-1) whose expression is increased in the brain and spinal cord during paclitaxel-induced neuropathic pain (PINP) might be a potential therapeutic target for managing PINP. Thus, our aim was to evaluate if systemic administration of a GAT-1 inhibitor ameliorates PINP. METHODS: The reaction latency to thermal stimuli (hot plate test; at 55 °C) and cold stimuli (cold plate test; at 4 °C) of female BALB/c mice was recorded before and after intraperitoneal treatment with paclitaxel, its vehicle, and/or a selective GAT-1 inhibitor NO-711...
2016: PeerJ
https://www.readbyqxmd.com/read/27981446/comparative-capability-of-menstrual-blood-versus-bone-marrow-derived-stem-cells-in-neural-differentiation
#19
Fereshteh Azedi, Somaieh Kazemnejad, Amir Hassan Zarnani, Masoud Soleimani, Amir Shojaei, Shaghayegh Arasteh
In order to characterize the potency of menstrual blood stem cells (MenSCs) for future cell therapy of neurological disorders instead of bone marrow stem cells (BMSCs) as a well-known and conventional source of adult stem cells, we examined the in vitro differentiation potential of these stem cells into neural-like cells. The differentiation potential of MenSCs to neural cells in comparison with BMSCs was assessed under two step neural differentiation including conversion to neurosphere-like cells and final differentiation...
December 15, 2016: Molecular Biology Reports
https://www.readbyqxmd.com/read/27979827/protective-roles-of-hepatic-gaba-signaling-in-acute-liver-injury-of-rats
#20
Shuanglian Wang, Yun-Yan Xiang, Jianchun Zhu, Fan Yi, Jingxin Li, Chuanyong Liu, Wei-Yang Lu
Gamma-aminobutyric acid (GABA) is produced by various cells through the catalytic activity of glutamic acid decarboxylase (GAD). Activation of type-A GABA receptor (GABAAR) inhibits stem cell proliferation but protects differentiated cells from injures. The present study investigated hepatic GABA signaling system and the role of this system in liver physiology and pathophysiology. RT-PCR and immunoblot assays identified GAD and GABAAR subunits in rat livers and in HepG2 and Clone 9 hepatocytes. Patch-clamp recording detected GABA-induced currents in Clone 9 hepatocytes and depolarization in WITT cholangiocytes...
December 15, 2016: American Journal of Physiology. Gastrointestinal and Liver Physiology
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