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Anadón R, Rodríguez-Moldes I, Adrio F. Distribution of gamma-aminobutyric acid immunoreactivity in the brain of the Siberian sturgeon (Acipenser baeri): Comparison with other fishes. J Comp Neurol 2024; 532:e25590. [PMID: 38335045 DOI: 10.1002/cne.25590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 01/08/2024] [Accepted: 01/13/2024] [Indexed: 02/12/2024]
Abstract
Gamma-aminobutyric acid (GABA) is the main inhibitory neurotransmitter in the central nervous system (CNS) of vertebrates. Immunohistochemical techniques with specific antibodies against GABA or against its synthesizing enzyme, glutamic acid decarboxylase (GAD) allowed characterizing GABAergic neurons and fibers in the CNS. However, studies on the CNS distribution of GABAergic neurons and fibers of bony fishes are scant and were done in teleost species. With the aim of understanding the early evolution of this system in bony vertebrates, we analyzed the distribution of GABA-immunoreactive (-ir) and GAD-ir neurons and fibers in the CNS of a basal ray-finned fish, the Siberian sturgeon (Chondrostei, Acipenseriformes), using immunohistochemical techniques. Our results revealed the presence and distribution of GABA/GAD-ir cells in different regions of the CNS such as olfactory bulbs, pallium and subpallium, hypothalamus, thalamus, pretectum, optic tectum, tegmentum, cerebellum, central grey, octavolateralis area, vagal lobe, rhombencephalic reticular areas, and the spinal cord. Abundant GABAergic innervation was observed in most brain regions, and GABAergic fibers were very abundant in the hypothalamic floor along the hypothalamo-hypophyseal tract and neurohypophysis. In addition, GABA-ir cerebrospinal fluid-contacting cells were observed in the alar and basal hypothalamus, saccus vasculosus, and spinal cord central canal. The distribution of GABAergic systems in the sturgeon brain shows numerous similarities to that observed in lampreys, but also to those of teleosts and tetrapods.
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Affiliation(s)
- Ramón Anadón
- Área de Bioloxía Celular, Departamento de Bioloxía Funcional, CIBUS, Facultade de Bioloxía, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Isabel Rodríguez-Moldes
- Área de Bioloxía Celular, Departamento de Bioloxía Funcional, CIBUS, Facultade de Bioloxía, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Fátima Adrio
- Área de Bioloxía Celular, Departamento de Bioloxía Funcional, CIBUS, Facultade de Bioloxía, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
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2
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Disserol CCD, Kowacs DP, Nabhan SK, Teive HAG, Kowacs PA. Case report: Successful autologous hematopoietic stem cell transplantation in a patient with GAD antibody-spectrum disorder with rapidly progressive dementia. Front Neurol 2023; 14:1254981. [PMID: 37928135 PMCID: PMC10622657 DOI: 10.3389/fneur.2023.1254981] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 09/20/2023] [Indexed: 11/07/2023] Open
Abstract
The prevalence of neurological syndromes associated with antibodies to glutamic acid decarboxylase is increasing. While cognitive impairment is a common feature of this condition, it seldom emerges as the primary symptom. In this study, we discuss a case of refractory dementia associated with the glutamic acid decarboxylase spectrum disorder. Interestingly, this case showed a favorable outcome following autologous hematopoietic stem cell transplantation. We also provide an in-depth review of the current literature on the use of this therapeutic approach for the treatment of this disease.
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Affiliation(s)
- Caio César Diniz Disserol
- Department of Neurology, Instituto de Neurologia de Curitiba, Curitiba, Brazil
- Department of Neurology, Complexo do Hospital de Clínicas da Universidade Federal do Paraná, Curitiba, Brazil
| | - Dora Pedroso Kowacs
- Department of Neurology, Instituto de Neurologia de Curitiba, Curitiba, Brazil
| | - Samir Kanaan Nabhan
- Blood and Marrow Transplantation Program, Hospital de Clínicas, Federal University of Paraná, Curitiba, Brazil
| | - Hélio Afonso Ghizoni Teive
- Department of Neurology, Complexo do Hospital de Clínicas da Universidade Federal do Paraná, Curitiba, Brazil
| | - Pedro André Kowacs
- Department of Neurology, Instituto de Neurologia de Curitiba, Curitiba, Brazil
- Department of Neurology, Complexo do Hospital de Clínicas da Universidade Federal do Paraná, Curitiba, Brazil
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3
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Vlad B, Wang Y, Newsome SD, Balint B. Stiff Person Spectrum Disorders-An Update and Outlook on Clinical, Pathophysiological and Treatment Perspectives. Biomedicines 2023; 11:2500. [PMID: 37760941 PMCID: PMC10525659 DOI: 10.3390/biomedicines11092500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 09/06/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
Stiff person spectrum disorders (SPSD) are paradigm autoimmune movement disorders characterized by stiffness, spasms and hyperekplexia. Though rare, SPSD represent a not-to-miss diagnosis because of the associated disease burden and treatment implications. After decades as an enigmatic orphan disease, major advances in our understanding of the evolving spectrum of diseases have been made along with the identification of multiple associated autoantibodies. However, the most important recent developments relate to the recognition of a wider affection, beyond the classic core motor symptoms, and to further insights into immunomodulatory and symptomatic therapies. In this review, we summarize the recent literature on the clinical and paraclinical spectrum, current pathophysiological understanding, as well as current and possibly future therapeutic strategies.
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Affiliation(s)
- Benjamin Vlad
- Department of Neurology, University Hospital Zurich, 8091 Zurich, Switzerland;
| | - Yujie Wang
- Department of Neurology, University of Washington, Seattle, WA 98195, USA
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Scott D. Newsome
- Division of Neuroimmunology and Neurological Infections, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Bettina Balint
- Department of Neurology, University Hospital Zurich, 8091 Zurich, Switzerland;
- Faculty of Medicine, University of Zurich, 8091 Zurich, Switzerland
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4
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Vecchio F, Carré A, Korenkov D, Zhou Z, Apaolaza P, Tuomela S, Burgos-Morales O, Snowhite I, Perez-Hernandez J, Brandao B, Afonso G, Halliez C, Kaddis J, Kent SC, Nakayama M, Richardson SJ, Vinh J, Verdier Y, Laiho J, Scharfmann R, Solimena M, Marinicova Z, Bismuth E, Lucidarme N, Sanchez J, Bustamante C, Gomez P, Buus S, You S, Pugliese A, Hyoty H, Rodriguez-Calvo T, Flodstrom-Tullberg M, Mallone R. Coxsackievirus infection induces direct pancreatic β-cell killing but poor anti-viral CD8+ T-cell responses. bioRxiv 2023:2023.08.19.553954. [PMID: 37662376 PMCID: PMC10473604 DOI: 10.1101/2023.08.19.553954] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Coxsackievirus B (CVB) infection of pancreatic β cells is associated with β-cell autoimmunity. We investigated how CVB impacts human β cells and anti-CVB T-cell responses. β cells were efficiently infected by CVB in vitro, downregulated HLA Class I and presented few, selected HLA-bound viral peptides. Circulating CD8+ T cells from CVB-seropositive individuals recognized only a fraction of these peptides, and only another sub-fraction was targeted by effector/memory T cells that expressed the exhaustion marker PD-1. T cells recognizing a CVB epitope cross-reacted with the β-cell antigen GAD. Infected β cells, which formed filopodia to propagate infection, were more efficiently killed by CVB than by CVB-reactive T cells. Thus, our in-vitro and ex-vivo data highlight limited T-cell responses to CVB, supporting the rationale for CVB vaccination trials for type 1 diabetes prevention. CD8+ T cells recognizing structural and non-structural CVB epitopes provide biomarkers to differentially follow response to infection and vaccination.
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Affiliation(s)
- Federica Vecchio
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | - Alexia Carré
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | - Daniil Korenkov
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | - Zhicheng Zhou
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | - Paola Apaolaza
- Institute of Diabetes Research, Helmholtz Zentrum München, German Research Center for Environmental Health, Munich-Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Soile Tuomela
- Center for Infectious Medicine, Department of medicine Huddinge, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | | | - Isaac Snowhite
- Diabetes Research Institute, Leonard Miller School of Medicine, University of Miami, FL, USA
- Department of Diabetes Immunology, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | | | - Barbara Brandao
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | - Georgia Afonso
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | | | - John Kaddis
- Department of Diabetes Immunology, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope, Duarte, CA, USA
- Department of Diabetes and Cancer Discovery Science, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Sally C. Kent
- University of Massachusetts Medical Chan School, Diabetes Center of Excellence, Department of Medicine, Worcester, MA, USA
| | - Maki Nakayama
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO, USA
| | - Sarah J. Richardson
- Islet Biology Exeter (IBEx), Exeter Centre of Excellence for Diabetes Research (EXCEED), Department of Clinical and Biomedical Sciences, University of Exeter Medical School, Exeter, UK
| | - Joelle Vinh
- ESPCI Paris, PSL University, Spectrométrie de Masse Biologique et Protéomique, CNRS UMR8249, Paris, France
| | - Yann Verdier
- ESPCI Paris, PSL University, Spectrométrie de Masse Biologique et Protéomique, CNRS UMR8249, Paris, France
| | - Jutta Laiho
- Tampere University, Faculty of Medicine and Health Technology and Fimlab Laboratories, Tampere, Finland
| | | | - Michele Solimena
- Paul Langerhans Institute, Technical University Dresden, Germany
| | | | - Elise Bismuth
- Assistance Publique Hôpitaux de Paris, Service d’Endocrinologie Pédiatrique, Robert Debré Hospital, Paris, France
| | - Nadine Lucidarme
- Assistance Publique Hôpitaux de Paris, Service de Pédiatrie, Jean Verdier Hospital, Bondy, France
| | - Janine Sanchez
- Department of Pediatrics, Division of pediatric Endocrinology, Leonard Miller School of Medicine, University of Miami, FL, USA
| | - Carmen Bustamante
- Department of Pediatrics, Division of pediatric Endocrinology, Leonard Miller School of Medicine, University of Miami, FL, USA
| | - Patricia Gomez
- Department of Pediatrics, Division of pediatric Endocrinology, Leonard Miller School of Medicine, University of Miami, FL, USA
| | - Soren Buus
- Panum Institute, Department of International Health, Immunology and Microbiology, Copenhagen, Denmark
| | | | - Sylvaine You
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
- Indiana Biosciences Research Institute, Indianapolis, IN, USA
| | - Alberto Pugliese
- Diabetes Research Institute, Leonard Miller School of Medicine, University of Miami, FL, USA
- Department of Diabetes Immunology, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Heikki Hyoty
- Tampere University, Faculty of Medicine and Health Technology and Fimlab Laboratories, Tampere, Finland
| | - Teresa Rodriguez-Calvo
- Institute of Diabetes Research, Helmholtz Zentrum München, German Research Center for Environmental Health, Munich-Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Malin Flodstrom-Tullberg
- Center for Infectious Medicine, Department of medicine Huddinge, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Roberto Mallone
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
- Indiana Biosciences Research Institute, Indianapolis, IN, USA
- Assistance Publique Hôpitaux de Paris, Service de Diabétologie et Immunologie Clinique, Cochin Hospital, Paris, France
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Xiao J, Han J, Qiao Z, Zhang G, Huang W, Qian K, Xu M, Zhang X, Yang T, Rao Z. [Efficient biosynthesis of γ-aminobutyric acid by rationally engineering the catalytic pH range of a glutamate decarboxylase from Lactobacillus plantarum]. Sheng Wu Gong Cheng Xue Bao 2023; 39:2108-2125. [PMID: 37401585 DOI: 10.13345/j.cjb.221012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 07/05/2023]
Abstract
γ-aminobutyric acid can be produced by a one-step enzymatic reaction catalyzed by glutamic acid decarboxylase. The reaction system is simple and environmentally friendly. However, the majority of GAD enzymes catalyze the reaction under acidic pH at a relatively narrow range. Thus, inorganic salts are usually needed to maintain the optimal catalytic environment, which adds additional components to the reaction system. In addition, the pH of solution will gradually rise along with the production of γ-aminobutyric acid, which is not conducive for GAD to function continuously. In this study, we cloned the glutamate decarboxylase LpGAD from a Lactobacillus plantarum capable of efficiently producing γ-aminobutyric acid, and rationally engineered the catalytic pH range of LpGAD based on surface charge. A triple point mutant LpGADS24R/D88R/Y309K was obtained from different combinations of 9 point mutations. The enzyme activity at pH 6.0 was 1.68 times of that of the wild type, suggesting the catalytic pH range of the mutant was widened, and the possible mechanism underpinning this increase was discussed through kinetic simulation. Furthermore, we overexpressed the Lpgad and LpgadS24R/D88R/Y309K genes in Corynebacterium glutamicum E01 and optimized the transformation conditions. An optimized whole cell transformation process was conducted under 40 ℃, cell mass (OD600) 20, 100 g/L l-glutamic acid substrate and 100 μmol/L pyridoxal 5-phosphate. The γ-aminobutyric acid titer of the recombinant strain reached 402.8 g/L in a fed-batch reaction carried out in a 5 L fermenter without adjusting pH, which was 1.63 times higher than that of the control. This study expanded the catalytic pH range of and increased the enzyme activity of LpGAD. The improved production efficiency of γ-aminobutyric acid may facilitate its large-scale production.
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Affiliation(s)
- Jiewen Xiao
- School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Jin Han
- School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Zhina Qiao
- School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Guodong Zhang
- Renren Health Industry Limited Company, Yichun 331200, Jiangxi, China
| | - Wujun Huang
- Renren Health Industry Limited Company, Yichun 331200, Jiangxi, China
| | - Kai Qian
- Renren Health Industry Limited Company, Yichun 331200, Jiangxi, China
| | - Meijuan Xu
- School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Xian Zhang
- School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Taowei Yang
- School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Zhiming Rao
- School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
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6
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Kawasaki E. Anti-Islet Autoantibodies in Type 1 Diabetes. Int J Mol Sci 2023; 24:10012. [PMID: 37373160 DOI: 10.3390/ijms241210012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 06/08/2023] [Accepted: 06/09/2023] [Indexed: 06/29/2023] Open
Abstract
Anti-islet autoantibodies serve as key markers in immune-mediated type 1 diabetes (T1D) and slowly progressive T1D (SPIDDM), also known as latent autoimmune diabetes in adults (LADA). Autoantibodies to insulin (IAA), glutamic acid decarboxylase (GADA), tyrosine phosphatase-like protein IA-2 (IA-2A), and zinc transporter 8 (ZnT8A) are currently employed in the diagnosis, pathological analysis, and prediction of T1D. GADA can also be detected in non-diabetic patients with autoimmune diseases other than T1D and may not necessarily reflect insulitis. Conversely, IA-2A and ZnT8A serve as surrogate markers of pancreatic β-cell destruction. A combinatorial analysis of these four anti-islet autoantibodies demonstrated that 93-96% of acute-onset T1D and SPIDDM cases were diagnosed as immune-mediated T1D, while the majority of fulminant T1D cases were autoantibody-negative. Evaluating the epitopes and immunoglobulin subclasses of anti-islet autoantibodies help distinguish between diabetes-associated and non-diabetes-associated autoantibodies and is valuable for predicting future insulin deficiency in SPIDDM (LADA) patients. Additionally, GADA in T1D patients with autoimmune thyroid disease reveals the polyclonal expansion of autoantibody epitopes and immunoglobulin subclasses. Recent advancements in anti-islet autoantibody assays include nonradioactive fluid-phase assays and the simultaneous determination of multiple biochemically defined autoantibodies. Developing a high-throughput assay for detecting epitope-specific or immunoglobulin isotype-specific autoantibodies will facilitate a more accurate diagnosis and prediction of autoimmune disorders. The aim of this review is to summarize what is known about the clinical significance of anti-islet autoantibodies in the pathogenesis and diagnosis of T1D.
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Affiliation(s)
- Eiji Kawasaki
- Diabetes Center, Shin-Koga Hospital, Kurume 830-8577, Japan
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Nasri A, Gharbi A, Ouali U, Mrabet S, Souissi A, Jomli R, Gargouri A, Bendjebara M, Kacem I, Gouider R. Psychiatric Symptoms in Stiff-Person Syndrome: A Systematic Review and a Report of Two Cases. J Acad Consult Liaison Psychiatry 2023; 64:183-191. [PMID: 35940576 DOI: 10.1016/j.jaclp.2022.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 07/16/2022] [Accepted: 07/18/2022] [Indexed: 10/16/2022]
Abstract
BACKGROUND The clinical spectrum of stiff-person syndrome (SPS) encompasses a wide range of signs including psychiatric symptoms (PS). OBJECTIVE Our objective was to provide an overview of the spectrum of PS in SPS through a systematic literature search and 2 illustrative case reports. METHODS We reported 2 anti-glutamic acid decarboxylase-positive SPS cases that presented with phobic disorder, and we performed a systematic review by following the 2020 Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Articles published in PubMed, MEDLINE on Ovid, Embase, and via a manual search before October 20, 2020, were selected by 2 independent reviewers. Original studies, case reports, editorials, commentaries, and letters to the editor reporting cases of SPS with PS were all included. Conference abstracts, reviews and book chapters, unavailable articles, and those not reporting SPS cases or PS were excluded. Quantitative summary data were calculated. RESULTS In addition to our 2 cases, we identified 237 cases of SPS with PS from 74 additional included publications totaling 239 patients. Anxiety (56%) and depression (45%) were the most common PS in SPS. Mean diagnostic delay was 4.7 years. Among the 3 SPS phenotypes, the classic form was predominant (77%), followed by stiff-limb syndrome (13%) and progressive encephalomyelitis with rigidity and myoclonus (10%). The most frequent etiology of SPS with PS was autoimmune (90%), followed by cryptogenic (7%) and paraneoplastic forms (7%). These patients were mainly treated with immune-mediated therapies and GABAergic drugs. CONCLUSIONS Our review revealed that the most common PS of SPS are anxiety and depression occurring mostly in autoimmune and classic forms, allowing a clearer understanding of this entity, which may lead to earlier diagnosis and better outcome.
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Affiliation(s)
- Amina Nasri
- Department of Neurology, LR18SP03, Clinical Investigation Center (CIC) "Neurosciences and Mental Health", Razi University Hospital, Tunis, Tunisia; Department of Psychiatry A, Razi University Hospital, Tunis, Tunisia; Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia.
| | - Alya Gharbi
- Department of Neurology, LR18SP03, Clinical Investigation Center (CIC) "Neurosciences and Mental Health", Razi University Hospital, Tunis, Tunisia.
| | - Uta Ouali
- Department of Psychiatry A, Razi University Hospital, Tunis, Tunisia; Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia.
| | - Saloua Mrabet
- Department of Neurology, LR18SP03, Clinical Investigation Center (CIC) "Neurosciences and Mental Health", Razi University Hospital, Tunis, Tunisia; Department of Psychiatry A, Razi University Hospital, Tunis, Tunisia; Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia.
| | - Amira Souissi
- Department of Neurology, LR18SP03, Clinical Investigation Center (CIC) "Neurosciences and Mental Health", Razi University Hospital, Tunis, Tunisia.
| | - Rabaa Jomli
- Department of Psychiatry A, Razi University Hospital, Tunis, Tunisia; Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia.
| | - Amina Gargouri
- Department of Neurology, LR18SP03, Clinical Investigation Center (CIC) "Neurosciences and Mental Health", Razi University Hospital, Tunis, Tunisia; Department of Psychiatry A, Razi University Hospital, Tunis, Tunisia; Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia.
| | - Mouna Bendjebara
- Department of Neurology, LR18SP03, Clinical Investigation Center (CIC) "Neurosciences and Mental Health", Razi University Hospital, Tunis, Tunisia; Department of Psychiatry A, Razi University Hospital, Tunis, Tunisia; Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia.
| | - Imen Kacem
- Department of Neurology, LR18SP03, Clinical Investigation Center (CIC) "Neurosciences and Mental Health", Razi University Hospital, Tunis, Tunisia; Department of Psychiatry A, Razi University Hospital, Tunis, Tunisia; Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia.
| | - Riadh Gouider
- Department of Neurology, LR18SP03, Clinical Investigation Center (CIC) "Neurosciences and Mental Health", Razi University Hospital, Tunis, Tunisia; Department of Psychiatry A, Razi University Hospital, Tunis, Tunisia; Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia.
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Zhang C, Dai Y, Han B, Peng J, Ma J, Tang Q, Yang L. A Case of Anti-GAD 65 Autoimmune Encephalitis Associated with Focal Segmental Stiff-Person Syndrome. Brain Sci 2023; 13. [PMID: 36831912 DOI: 10.3390/brainsci13020369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 02/10/2023] [Accepted: 02/16/2023] [Indexed: 02/23/2023] Open
Abstract
Glutamic acid decarboxylase (GAD) antibody-related encephalitis is an autoimmune disease associated with intracellular neuronal antigens. We report on a rare case of GAD antibody-associated encephalitis complicated with focal segmental stiffness-person syndrome (SPS) in a middle-aged woman. The disease course lasted for >10 years, initially presenting with drug-resistant epilepsy, followed by stiffness of the right lower limb, and right upper limb involvement. The patient experienced anxiety and depression symptoms due to long-term illness. During hospitalization, serum and cerebrospinal fluid GAD antibodies were positive and no tumor was found. The symptoms were significantly relieved after corticosteroid therapy and intravenous immunoglobulin immunomodulation therapy. To the best of our knowledge, this case is the first to discuss the early recognition and treatment of chronic epilepsy and focal segmental SPS caused by anti-GAD antibody-related encephalitis.
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9
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Kharel S, Ojha R, Bhandari S, Sharma A, Parajuli N, Karn R, Gajurel BP, Rajbhandari R, Gautam N, Shrestha A. Stiff person syndrome in a Nepalese man with uncontrolled diabetes mellitus and ketonuria: A rare case report. Clin Case Rep 2023; 11:e6936. [PMID: 36789300 PMCID: PMC9909259 DOI: 10.1002/ccr3.6936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 10/13/2022] [Accepted: 01/23/2023] [Indexed: 02/11/2023] Open
Abstract
Stiff Person Syndrome (SPS), a progressive Central Nervous System disorder is accompanied by progressive muscle rigidity, hyperreflexia, and spasms mainly in truncal and proximal leg muscles mainly associated with autoimmune disorders. Here, we report a rare case of SPS in a middle-aged Nepalese man with uncontrolled diabetes mellitus and ketonuria.
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Affiliation(s)
- Sanjeev Kharel
- Maharajgunj Medical CampusTribhuvan University Institute of MedicineKathmanduNepal
| | - Rajeev Ojha
- Department of NeurologyTribhuvan University Teaching HospitalKathmanduNepal
| | - Siddhartha Bhandari
- Maharajgunj Medical CampusTribhuvan University Institute of MedicineKathmanduNepal
| | - Amit Sharma
- Maharajgunj Medical CampusTribhuvan University Institute of MedicineKathmanduNepal
| | - Naresh Parajuli
- Department of EndocrinologyTribhuvan University Teaching HospitalKathmanduNepal
| | - Ragesh Karn
- Department of NeurologyTribhuvan University Teaching HospitalKathmanduNepal
| | | | - Reema Rajbhandari
- Department of NeurologyTribhuvan University Teaching HospitalKathmanduNepal
| | - Niraj Gautam
- Department of NeurologyTribhuvan University Teaching HospitalKathmanduNepal
| | - Ashish Shrestha
- Department of NeurologyTribhuvan University Teaching HospitalKathmanduNepal
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10
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Yao C, Shi F, Wang X. Chromosomal editing of Corynebacterium glutamicum ATCC 13032 to produce gamma-aminobutyric acid. Biotechnol Appl Biochem 2023; 70:7-21. [PMID: 35106837 DOI: 10.1002/bab.2324] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 01/18/2022] [Indexed: 11/08/2022]
Abstract
Corynebacterium glutamicum has been used as a sustainable microbial producer for various bioproducts using cheap biomass resources. In this study, a high GABA-producing C. glutamicum strain was constructed by chromosomal editing. Lactobacillus brevis-derived gadB2 was introduced into the chromosome of C. glutamicum ATCC 13032 to produce gamma-aminobutyric acid and simultaneously blocked the biosynthesis of lactate and acetate. GABA transport and degradation in C. glutamicum were also blocked to improve GABA production. As precursor of GABA, l-glutamic acid synthesis in C. glutamicum was enhanced by introducing E. coli gdhA encoding glutamic dehydrogenase, and the copy numbers of gdhA and gadB2 were also optimized for higher GABA production. The final C. glutamicum strain CGY705 could produce 33.17 g/L GABA from glucose in a 2.4-L bioreactor after 78 h fed-batch fermentation. Since all deletion and expression of genes were performed using chromosomal editing, fermentation of the GABA-producing strains constructed in this study does not need supplementation of any antibiotics and inducers. The strategy used in this study has potential value in the development of GABA-producing bacteria.
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Affiliation(s)
- Chengzhen Yao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu Province, China
| | - Feng Shi
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu Province, China.,Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Xiaoyuan Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu Province, China.,Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
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11
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Taşkaldıran I, Nar A. A Case of New-onset Autoimmune Type-1 Diabetes Mellitus Following COVID-19 Infection. Endocr Metab Immune Disord Drug Targets 2023; 23:1455-1457. [PMID: 37076470 DOI: 10.2174/1871530323666230418092121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 02/14/2023] [Accepted: 02/17/2023] [Indexed: 04/21/2023]
Abstract
BACKGROUND After COVID-19 infection, various mechanisms may initiate an increased risk of developing DM. This study presented a newly developed autoimmune Type 1 DM (T1DM) case in an adult patient after a SARS-CoV-2 infection. CASE PRESENTATION A 48-year-old male patient presented with complaints of weight loss and blurred vision. His blood sugar and HbA1c were measured as 557 mg/dl and 12.6%, respectively. His medical records showed no known diagnosis of DM. He had a SARS-CoV-2 infection 4 weeks ago. Then, we diagnosed DM and started basal-bolus insulin therapy. C-peptides and autoantibodies were requested from the patient to explore the etiology of diabetes. Glutamic acid decarboxylase (GAD) antibody was > 2000 U/mL (ref: 0-10); therefore, the patient was accepted as having autoimmune T1DM. New-onset DM cases triggered by COVID-19 have increasingly been reported recently. SARS-CoV-2 virus, using the ACE2 receptor in the pancreas, can enter beta cells and causes damage to these islets and impaired insulin secretion, leading to acute diabetes mellitus. In addition, the abnormal immunity elicited by SARS-CoV-2 can also induce autoimmune destruction of pancreatic islet cells. CONCLUSION T1DM may be an uncommon but possible complication due to the COVID-19 virus among genetically predisposed individuals. Overall, the case highlights the importance of preventive measures, such as vaccination, to protect against COVID-19 and its complications.
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Affiliation(s)
- Işılay Taşkaldıran
- Department of Endocrinology and Metabolism, Faculty of Medicine, Başkent University, Ankara, Turkey
| | - Aslı Nar
- Department of Endocrinology and Metabolism, Faculty of Medicine, Başkent University, Ankara, Turkey
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12
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Cantatore F, Marcatili M, Withers J. 'First case of Stiff-horse syndrome in United Kingdom'. J Equine Vet Sci 2022; 116:104022. [PMID: 35649492 DOI: 10.1016/j.jevs.2022.104022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 05/17/2022] [Accepted: 05/21/2022] [Indexed: 11/26/2022]
Abstract
Stiff-person syndrome is a well-recognised disease in humans, whilst cases of stiff-horse syndrome (SHS) have been rarely reported in the veterinary medicine literature. SHS is a progressive immunomediated disorder of the central nervous system leading to a disturbance of gamma amino butyric acid (GABA) transmission at the neuromuscular junction in which antibodies are produced against the enzyme glutamic acid decarboxylase (GAD). A 6 year-old Irish Sport Horse was presented for investigation of involuntary violent contraction of hindlimb and back muscles triggered by stress. The diagnosis of SHS was made after elevated anti-GAD antibodies titres were detected in the horse's serum. Administration of oral corticosteroids (prednisolone 0.75 mg/kg bwt) resulted in resolution of the clinical signs. However, reoccurrence of clinical signs was observed after the dose of corticosteroids was reduced or the treatment discontinued. To the best of the authors' knowledge this is the first reported case of SHS in United Kingdom. Considering the potential implications on the horses' welfare, further investigation on SHS pathogenesis and treatment are warranted.
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Affiliation(s)
- Federica Cantatore
- Pool House Equine Clinic, Fradley, Lichfield, Staffordshire, United Kingdom.
| | - Marco Marcatili
- Pool House Equine Clinic, Fradley, Lichfield, Staffordshire, United Kingdom.
| | - Jonathan Withers
- Pool House Equine Clinic, Fradley, Lichfield, Staffordshire, United Kingdom.
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13
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Strippel C, Herrera-Rivero M, Wendorff M, Tietz AK, Degenhardt F, Witten A, Schroeter C, Nelke C, Golombeck KS, Madlener M, Rüber T, Ernst L, Racz A, Baumgartner T, Widman G, Doppler K, Thaler F, Siebenbrodt K, Dik A, Kerin C, Räuber S, Gallus M, Kovac S, Grauer OM, Grimm A, Prüss H, Wickel J, Geis C, Lewerenz J, Goebels N, Ringelstein M, Menge T, Tackenberg B, Kellinghaus C, Bien CG, Kraft A, Zettl U, Ismail FS, Ayzenberg I, Urbanek C, Sühs KW, Tauber SC, Mues S, Körtvélyessy P, Markewitz R, Paliantonis A, Elger CE, Surges R, Sommer C, Kümpfel T, Gross CC, Lerche H, Wellmer J, Quesada CM, Then Bergh F, Wandinger KP, Becker AJ, Kunz WS, Meyer zu Hörste G, Malter MP, Rosenow F, Wiendl H, Kuhlenbäumer G, Leypoldt F, Lieb W, Franke A, Meuth SG, Stoll M, Melzer N. A genome-wide association study in autoimmune neurological syndromes with anti-GAD65 autoantibodies. Brain 2022; 146:977-990. [PMID: 35348614 PMCID: PMC9976967 DOI: 10.1093/brain/awac119] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 02/11/2022] [Accepted: 03/13/2022] [Indexed: 11/15/2022] Open
Abstract
Autoimmune neurological syndromes (AINS) with autoantibodies against the 65 kDa isoform of the glutamic acid decarboxylase (GAD65) present with limbic encephalitis, including temporal lobe seizures or epilepsy, cerebellitis with ataxia, and stiff-person-syndrome or overlap forms. Anti-GAD65 autoantibodies are also detected in autoimmune diabetes mellitus, which has a strong genetic susceptibility conferred by human leukocyte antigen (HLA) and non-HLA genomic regions. We investigated the genetic predisposition in patients with anti-GAD65 AINS. We performed a genome-wide association study (GWAS) and an association analysis of the HLA region in a large German cohort of 1214 individuals. These included 167 patients with anti-GAD65 AINS, recruited by the German Network for Research on Autoimmune Encephalitis (GENERATE), and 1047 individuals without neurological or endocrine disease as population-based controls. Predictions of protein expression changes based on GWAS findings were further explored and validated in the CSF proteome of a virtually independent cohort of 10 patients with GAD65-AINS and 10 controls. Our GWAS identified 16 genome-wide significant (P < 5 × 10-8) loci for the susceptibility to anti-GAD65 AINS. The top variant, rs2535288 [P = 4.42 × 10-16, odds ratio (OR) = 0.26, 95% confidence interval (CI) = 0.187-0.358], localized to an intergenic segment in the middle of the HLA class I region. The great majority of variants in these loci (>90%) mapped to non-coding regions of the genome. Over 40% of the variants have known regulatory functions on the expression of 48 genes in disease relevant cells and tissues, mainly CD4+ T cells and the cerebral cortex. The annotation of epigenomic marks suggested specificity for neural and immune cells. A network analysis of the implicated protein-coding genes highlighted the role of protein kinase C beta (PRKCB) and identified an enrichment of numerous biological pathways participating in immunity and neural function. Analysis of the classical HLA alleles and haplotypes showed no genome-wide significant associations. The strongest associations were found for the DQA1*03:01-DQB1*03:02-DRB1*04:01HLA haplotype (P = 4.39 × 10-4, OR = 2.5, 95%CI = 1.499-4.157) and DRB1*04:01 allele (P = 8.3 × 10-5, OR = 2.4, 95%CI = 1.548-3.682) identified in our cohort. As predicted, the CSF proteome showed differential levels of five proteins (HLA-A/B, C4A, ATG4D and NEO1) of expression quantitative trait loci genes from our GWAS in the CSF proteome of anti-GAD65 AINS. These findings suggest a strong genetic predisposition with direct functional implications for immunity and neural function in anti-GAD65 AINS, mainly conferred by genomic regions outside the classical HLA alleles.
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Affiliation(s)
| | | | - Mareike Wendorff
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Anja K Tietz
- Department of Neurology, University of Kiel, Kiel, Germany
| | - Frauke Degenhardt
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Anika Witten
- Department of Genetic Epidemiology, Institute of Human Genetics, University of Münster, Münster, Germany
| | - Christina Schroeter
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany,Department of Neurology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Christopher Nelke
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany,Department of Neurology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Kristin S Golombeck
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany,Department of Neurology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Marie Madlener
- Department of Neurology, University of Cologne, Cologne, Germany
| | - Theodor Rüber
- Department of Epileptology, University of Bonn, Bonn, Germany,Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, University Hospital Frankfurt, and LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe-University Frankfurt, Frankfurt am Main, Germany
| | - Leon Ernst
- Department of Epileptology, University of Bonn, Bonn, Germany
| | - Attila Racz
- Department of Epileptology, University of Bonn, Bonn, Germany
| | | | - Guido Widman
- Department of Epileptology, University of Bonn, Bonn, Germany
| | - Kathrin Doppler
- Department of Neurology, University of Würzburg, Würzburg, Germany
| | - Franziska Thaler
- Institute of Clinical Neuroimmunology, University Hospital, Ludwig-Maximilians-Universität Munich, Munich, Germany,Biomedical Center (BMC), Medical Faculty, Ludwig-Maximilians-Universität Munich, Martinsried, Germany
| | - Kai Siebenbrodt
- Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, University Hospital Frankfurt, and LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe-University Frankfurt, Frankfurt am Main, Germany
| | - Andre Dik
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany,Department of Neurology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Constanze Kerin
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany
| | - Saskia Räuber
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany,Department of Neurology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Marco Gallus
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany
| | - Stjepana Kovac
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany
| | - Oliver M Grauer
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany
| | - Alexander Grimm
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Harald Prüss
- Department of Neurology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Jonathan Wickel
- Section of Translational Neuroimmunology, Department of Neurology, Jena University Hospital, Jena, Germany
| | - Christian Geis
- Section of Translational Neuroimmunology, Department of Neurology, Jena University Hospital, Jena, Germany
| | - Jan Lewerenz
- Department of Neurology, Ulm University, Ulm, Germany
| | - Norbert Goebels
- Department of Neurology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Marius Ringelstein
- Department of Neurology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany,Center for Neurology and Neuropsychiatry, LVR Klinikum, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Til Menge
- Department of Neurology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany,Center for Neurology and Neuropsychiatry, LVR Klinikum, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Björn Tackenberg
- Department of Neurology, University of Marburg/Gießen, Marburg, Germany
| | | | - Christian G Bien
- Department of Epileptology (Krankenhaus Mara), Bielefeld University, Medical School, Campus Bielefeld-Bethel, Bielefeld, Germany
| | | | - Uwe Zettl
- Department of Neurology, University of Rostock, Rostock, Germany
| | - Fatme Seval Ismail
- Department of Neurology, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, Bochum, Germany
| | - Ilya Ayzenberg
- Department of Neurology, I.M. Sechenov First Moscow State Medical University, Moscow, Russia,Department of Neurology, St Josefs Krankenhaus Bochum, Ruhr University Bochum, Bochum, Germany
| | - Christian Urbanek
- Department of Neurology, Ludwigshafen Hospital, Ludwigshafen, Germany
| | - Kurt-Wolfram Sühs
- Department of Neurology, University Hospital, MHH, Hannover, Germany
| | - Simone C Tauber
- Department of Neurology, University Hospital RWTH Aachen, Aachen, Germany
| | - Sigrid Mues
- Department of Neurology, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, Bochum, Germany,Department of Neurology, University Hospital Dresden, Dresden, Germany
| | - Peter Körtvélyessy
- Department of Neurology, Charité Universitätsmedizin Berlin, Berlin, Germany,Department of Neurology, University Hospital Magdeburg, Magdeburg, Germany
| | - Robert Markewitz
- Neuroimmunology, Institute of Clinical Chemistry, University Hospital Schleswig-Holstein, Kiel/Lübeck, Germany
| | | | | | - Rainer Surges
- Department of Epileptology, University of Bonn, Bonn, Germany
| | - Claudia Sommer
- Department of Neurology, University of Würzburg, Würzburg, Germany
| | - Tania Kümpfel
- Institute of Clinical Neuroimmunology, University Hospital, Ludwig-Maximilians-Universität Munich, Munich, Germany,Biomedical Center (BMC), Medical Faculty, Ludwig-Maximilians-Universität Munich, Martinsried, Germany
| | - Catharina C Gross
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany
| | - Holger Lerche
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Jörg Wellmer
- Department of Neurology, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, Bochum, Germany
| | - Carlos M Quesada
- Department of Neurology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | | | - Klaus-Peter Wandinger
- Neuroimmunology, Institute of Clinical Chemistry, University Hospital Schleswig-Holstein, Kiel/Lübeck, Germany
| | - Albert J Becker
- Section of Translational Epileptology, Institute of Neuropathology, University of Bonn, Bonn, Germany
| | - Wolfram S Kunz
- Department of Epileptology, University of Bonn, Bonn, Germany
| | - Gerd Meyer zu Hörste
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany
| | - Michael P Malter
- Department of Neurology, University of Cologne, Cologne, Germany
| | - Felix Rosenow
- Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, University Hospital Frankfurt, and LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe-University Frankfurt, Frankfurt am Main, Germany
| | - Heinz Wiendl
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany
| | | | - Frank Leypoldt
- Department of Neurology, University of Kiel, Kiel, Germany,Neuroimmunology, Institute of Clinical Chemistry, University Hospital Schleswig-Holstein, Kiel/Lübeck, Germany
| | - Wolfgang Lieb
- Institute of Epidemiology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Andre Franke
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | | | - Monika Stoll
- Correspondence may also be addressed to: Monika Stoll E-mail:
| | - Nico Melzer
- Correspondence to: Nico Melzer Department of Neurology, Medical Faculty, Heinrich-Heine University of Düsseldorf Moorenstraße 5, 40225 Düsseldorf, Germany E-mail:
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14
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Sobierajski E, Lauer G, Aktas M, Beemelmans C, Beemelmans C, Meyer G, Wahle P. Development of microglia in fetal and postnatal neocortex of the pig, the European wild boar (Sus scrofa). J Comp Neurol 2021; 530:1341-1362. [PMID: 34817865 DOI: 10.1002/cne.25280] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 11/16/2021] [Accepted: 11/19/2021] [Indexed: 01/01/2023]
Abstract
Knowledge on cortical development is based mainly on rodents besides primates and carnivores, all being altricial. Here, we analyzed a precocial animal, the pig, looking at dorsoparietal cortex from E45 to P90. At E45, most ionized calcium-binding adapter molecule 1-positive (Iba1+) cells had a macrophage-like morphology and resided in meninges and choroid plexus. Only a few cells were scattered in the ventricular and subventricular zone (VZ and SVZ). At E60/E70, all laminar compartments displayed microglia cells at a low-to-moderate density, being highest in VZ and SVZ followed by intermediate zone/white matter (IZ/WM). The cortical plate and marginal zone displayed only a few Iba1+ cells. Cells were intensely labeled, but still had poorly arborized somata and many resembled ameboid, macrophage-like microglia. Concurrent with a massive increase in cortical volume, microglia cell density increased until E85, and further until E100/E110 (birth at E114) to densities that resemble those seen postnatally. A fraction of microglia colabeled with Ki67 suggesting proliferation in all laminar compartments. Cell-to-cell distance decreased substantially during this time, and the fraction of microglia to all nuclei and to neurons increases in the laminar compartments. Eventually, of all cortical DAPI+ nuclei 7-12% were Iba1+ microglia. From E70 onwards, more and more cells with ramified processes were present in MZ down to IZ/WM, showing, for instance, a close association with NeuN+, NPY+, and GAD65/67+ somata and axon initial segments. These results suggested that the development of microglia cell density and morphology proceeds rapidly from mid-gestation onwards reaching near-adult status already before birth.
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Affiliation(s)
- Eric Sobierajski
- Department of Developmental Neurobiology, Faculty of Biology and Biotechnology, Ruhr University Bochum, Bochum, Germany
| | - German Lauer
- Department of Developmental Neurobiology, Faculty of Biology and Biotechnology, Ruhr University Bochum, Bochum, Germany
| | - Meriyem Aktas
- Department of Microbial Biology, Faculty of Biology and Biotechnology, Ruhr University Bochum, Bochum, Germany
| | | | | | - Gundela Meyer
- Department of Basic Medical Science, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - Petra Wahle
- Department of Developmental Neurobiology, Faculty of Biology and Biotechnology, Ruhr University Bochum, Bochum, Germany
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15
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Massah A, Neupert S, Brodesser S, Homberg U, Stengl M. Distribution and daily oscillation of GABA in the circadian system of the cockroach Rhyparobia maderae. J Comp Neurol 2021; 530:770-791. [PMID: 34586642 DOI: 10.1002/cne.25244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 09/06/2021] [Accepted: 09/09/2021] [Indexed: 12/28/2022]
Abstract
Gamma-aminobutyric acid (GABA) is the prevalent inhibitory neurotransmitter in nervous systems promoting sleep in both mammals and insects. In the Madeira cockroach, sleep-wake cycles are controlled by a circadian clock network in the brain's optic lobes, centered in the accessory medulla (AME) with its innervating pigment-dispersing factor (PDF) expressing clock neurons at the anterior-ventral rim of the medulla. GABA is present in cell clusters that innervate different circuits of the cockroach's AME clock, without colocalizing in PDF clock neurons. Physiological, immunohistochemical, and behavioral assays provided evidence for a role of GABA in light entrainment, possibly via the distal tract that connects the AME's glomeruli to the medulla. Furthermore, GABA was implemented in clock outputs to multiple effector systems in optic lobe and midbrain. Here, GABAergic brain circuits were analyzed further, focusing on the circadian system in search for sleep/wake controlling brain circuits. All GABA-immunoreactive neurons of the cockroach brain were also stained with an antiserum against the GABA-synthesizing enzyme glutamic acid decarboxylase. We found strong overlap of the distribution of GABA-immunoreactive networks with PDF clock networks in optic lobes and midbrain. Neurons in five of the six soma groups that innervate the clock exhibited GABA immunoreactivity. The intensity of GABA immunoreactivity in the distal tract showed daily fluctuations with maximum staining intensity in the middle of the day and weakest staining at the end of the day. Quantification via enzyme-linked immunosorbent assay and quantitative liquid chromatography coupled to electrospray ionization tandem mass spectrometry, likewise, showed higher GABA levels in the optic lobe during the inactivity phase of the cockroach during the day and lower levels during its activity phase at dusk. Our data further support the hypothesis that light- and PDF-dependently the circadian clock network of the cockroach controls GABA levels and thereby promotes sleep during the day.
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Affiliation(s)
- Azar Massah
- Institute of Biology, Animal Physiology, University of Kassel, Kassel, Germany
| | - Susanne Neupert
- Institute of Biology, Animal Physiology, University of Kassel, Kassel, Germany
| | - Susanne Brodesser
- Cluster of Excellence Cellular Stress Responses in Aging-Associated Diseases (CECAD), Faculty of Medicine and University Hospital of Cologne, University of Cologne, Cologne, Germany
| | - Uwe Homberg
- Department of Biology, Animal Physiology, Philipps-Universität Marburg, Marburg, Germany.,Center for Mind, Brain and Behavior (CMBB), University of Marburg and Justus Liebig University Giessen, Marburg, Germany
| | - Monika Stengl
- Institute of Biology, Animal Physiology, University of Kassel, Kassel, Germany
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16
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Czempik PF, Gawryluk J, Wiórek A, Krzystanek E, Krzych ŁJ. Efficacy and safety of therapeutic plasma exchange in stiff person syndrome. Open Med (Wars) 2021; 16:526-531. [PMID: 33821220 PMCID: PMC8010154 DOI: 10.1515/med-2021-0220] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 11/20/2020] [Accepted: 01/08/2021] [Indexed: 12/29/2022] Open
Abstract
The stiff person syndrome (SPS) is an extremely rare neurological disorder with primarily immune-mediated etiology. The cardinal symptoms are progressive, fluctuating axial/proximal limb muscle stiffness and spasms. The diagnosis is based on the clinical picture, electromyography examination and detection of antibodies to glutamic acid decarboxylase (anti-GAD). Adverse effects of medications might preclude its use or increase in dosing, therefore symptomatic and/or immunomodulatory medical therapy might be ineffective in acute exacerbation of the disease. We present a case of a 49-year-old female with exacerbation of SPS, in whom some standard pharmacotherapy could not be introduced (clonazepam, baclofen used in the past) and doses of existing standard medications could not be increased (diazepam, gabapentin, and levetiracetam) due to adverse effects. Moreover, a newly introduced medication (methylprednisolone) also led to a serious adverse effect (severe hyperglycemia). The patient underwent therapeutic plasma exchange (TPE) with good effect and no complications. We review the literature regarding the efficacy and safety profile of TPE in exacerbation of SPS unresponsive to medical therapy. The procedure seems to have a good safety profile as an adjunct therapy for exacerbation of SPS not responding to standard medical therapy in this patient population.
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Affiliation(s)
- Piotr F Czempik
- Department of Anaesthesiology and Intensive Care, Faculty of Medical Sciences in Katowice, Medical University of Silesia, Medyków 14, Katowice, 40-752, Poland
| | - Justyna Gawryluk
- Department of Neurology, Faculty of Medical Sciences in Katowice, Medical University of Silesia, Medyków 14, Katowice, 40-752, Poland
| | - Agnieszka Wiórek
- Department of Anaesthesiology and Intensive Care, Faculty of Medical Sciences in Katowice, Medical University of Silesia, Medyków 14, Katowice, 40-752, Poland
| | - Ewa Krzystanek
- Department of Neurology, Faculty of Medical Sciences in Katowice, Medical University of Silesia, Medyków 14, Katowice, 40-752, Poland
| | - Łukasz J Krzych
- Department of Anaesthesiology and Intensive Care, Faculty of Medical Sciences in Katowice, Medical University of Silesia, Medyków 14, Katowice, 40-752, Poland
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17
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Oshi A, Alfaifi A, Seidahmed MZ, Al Hussein K, Miqdad A, Samadi A, Abdelbasit O. GABA transaminase deficiency. Case report and literature review. Clin Case Rep 2021; 9:1295-1298. [PMID: 33768830 PMCID: PMC7981681 DOI: 10.1002/ccr3.3753] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 09/09/2020] [Accepted: 09/17/2020] [Indexed: 11/07/2022] Open
Abstract
GABA transaminase deficiency should be considered in the differential diagnosis of early onset epileptic encephalopathies. This case was diagnosed post-mortem, but increased vigilance to this will allow for earlier diagnoses in other infants and families. This is a case study which involved diagnosis of a rare neurometabolic disorder in one of the babies in the family and eventual genetic counselling of the family. The family has been offered pre-implantation genetic diagnosis for future pregnancies. This case reporting has been approved by the hospital research and ethical committee.
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Affiliation(s)
- Amira Oshi
- Department of PediatricsSecurity Forces HospitalRiyadhSaudi Arabia
| | - Abdullah Alfaifi
- Department of PediatricsSecurity Forces HospitalRiyadhSaudi Arabia
| | | | | | - Abeer Miqdad
- Department of PediatricsSecurity Forces HospitalRiyadhSaudi Arabia
| | | | - Omar Abdelbasit
- Department of PediatricsSecurity Forces HospitalRiyadhSaudi Arabia
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18
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Szpręgiel I, Wrońska D, Kmiecik M, Pałka S, Kania BF. Glutamic Acid Decarboxylase Concentration Changes in Response to Stress and Altered Availability of Glutamic Acid in Rabbit ( Oryctolagus cuniculus) Brain Limbic Structures. Animals (Basel) 2021; 11:455. [PMID: 33572286 PMCID: PMC7915518 DOI: 10.3390/ani11020455] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 01/31/2021] [Accepted: 02/04/2021] [Indexed: 12/18/2022] Open
Abstract
Glutamic acid decarboxylase (GAD) is an enzyme that catalyses the formation of γ-aminobutyric acid (GABA), the most important inhibitory neurotransmitter, from glutamic acid (Glu), which is considered the most important excitatory transmitter in the central and peripheral nervous systems. GAD is a key enzyme that provides a balance between Glu and GABA concentration. Hence, it can be assumed that if the GAD executes the synthesis of GABA from Glu, it is important in the stress response, and thus also in triggering the emotional states of the body that accompany stress. The aim of the study was to investigate the concentration of the GAD in motivational structures in the brain of the rabbit (Oryctolagus cuniculus) under altered homeostatic conditions caused by stress and variable availability of Glu. Summarising, the experimental results clearly showed variable concentrations of GAD in the motivational structures of the rabbit brain. The highest concentration of GAD was found in the hypothalamus, which suggests a strong effect of Glu and GABA on the activity of this brain structure. The GAD concentrations in individual experimental groups depended to a greater extent on blocking the activity of glutamate receptors than on the effects of a single stress exposure. The results obtained clearly support the possibility that a rapid change in the concentration of GAD could shift bodily responses to quickly achieve homeostasis, especially in this species. Further studies are necessary to reveal the role of the Glu-GAD-GABA system in the modulation of stress situations as well as in body homeostasis.
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Affiliation(s)
- Izabela Szpręgiel
- Department of Animal Physiology and Endocrinology, Faculty of Animal Sciences, University of Agriculture in Krakow, Al. Mickiewicza 24/28, 30-059 Kraków, Poland;
| | - Danuta Wrońska
- Department of Animal Physiology and Endocrinology, Faculty of Animal Sciences, University of Agriculture in Krakow, Al. Mickiewicza 24/28, 30-059 Kraków, Poland;
| | - Michał Kmiecik
- Department of Genetics, Animal Breeding and Ethology, Faculty of Animal Sciences, University of Agriculture in Krakow, Al. Mickiewicza 24/28, 30-059 Kraków, Poland; (M.K.); (S.P.)
| | - Sylwia Pałka
- Department of Genetics, Animal Breeding and Ethology, Faculty of Animal Sciences, University of Agriculture in Krakow, Al. Mickiewicza 24/28, 30-059 Kraków, Poland; (M.K.); (S.P.)
| | - Bogdan F. Kania
- University Centre of Veterinary Medicine JU-AU, University of Agriculture in Kraków, Mickiewicza 24/28, 30-059 Kraków, Poland;
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19
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Homberg U, Hensgen R, Rieber E, Seyfarth J, Kern M, Dippel S, Dircksen H, Spänig L, Kina YP. Orcokinin in the central complex of the locust Schistocerca gregaria: Identification of immunostained neurons and colocalization with other neuroactive substances. J Comp Neurol 2020; 529:1876-1894. [PMID: 33128250 DOI: 10.1002/cne.25062] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 10/22/2020] [Accepted: 10/22/2020] [Indexed: 12/20/2022]
Abstract
The central complex is a group of highly interconnected neuropils in the insect brain. It is involved in the control of spatial orientation, based on external compass cues and various internal needs. The functional and neurochemical organization of the central complex has been studied in detail in the desert locust Schistocerca gregaria. In addition to classical neurotransmitters, immunocytochemistry has provided evidence for a major contribution of neuropeptides to neural signaling within the central complex. To complement these data, we have identified all orcokinin-immunoreactive neurons in the locust central complex and associated brain areas. About 50 bilateral pairs of neurons innervating all substructures of the central complex exhibit orcokinin immunoreactivity. Among these were about 20 columnar neurons, 33 bilateral pairs of tangential neurons of the central body, and seven pairs of tangential neurons of the protocerebral bridge. In silico transcript analysis suggests the presence of eight different orcokinin-A type peptides in the desert locust. Double label experiments showed that all orcokinin-immunostained tangential neurons of the lateral accessory lobe cluster were also immunoreactive for GABA and the GABA-synthesizing enzyme glutamic acid decarboxylase. Two types of tangential neurons of the upper division of the central body were, furthermore, also labeled with an antiserum against Dip-allatostatin I. No colocalization was found with serotonin immunostaining. The data provide additional insights into the neurochemical organization of the locust central complex and suggest that orcokinin-peptides of the orcokinin-A gene act as neuroactive substances at all stages of signal processing in this brain area.
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Affiliation(s)
- Uwe Homberg
- Department of Biology, Animal Physiology & Center for Mind, Brain and Behavior (CMBB), University of Marburg and Justus Liebig University Giessen, Marburg, Germany
| | - Ronja Hensgen
- Department of Biology, Animal Physiology & Center for Mind, Brain and Behavior (CMBB), University of Marburg and Justus Liebig University Giessen, Marburg, Germany
| | - Evelyn Rieber
- Department of Biology, Animal Physiology & Center for Mind, Brain and Behavior (CMBB), University of Marburg and Justus Liebig University Giessen, Marburg, Germany.,Behavioral Physiology and Sociobiology, Biocenter, University of Würzburg, Würzburg, Germany
| | - Jutta Seyfarth
- Department of Biology, Animal Physiology & Center for Mind, Brain and Behavior (CMBB), University of Marburg and Justus Liebig University Giessen, Marburg, Germany
| | - Martina Kern
- Department of Biology, Animal Physiology & Center for Mind, Brain and Behavior (CMBB), University of Marburg and Justus Liebig University Giessen, Marburg, Germany
| | - Stefan Dippel
- Department of Biology, Animal Physiology & Center for Mind, Brain and Behavior (CMBB), University of Marburg and Justus Liebig University Giessen, Marburg, Germany
| | | | - Lisa Spänig
- Department of Biology, Animal Physiology & Center for Mind, Brain and Behavior (CMBB), University of Marburg and Justus Liebig University Giessen, Marburg, Germany
| | - Yelda Pakize Kina
- Department of Biology, Animal Physiology & Center for Mind, Brain and Behavior (CMBB), University of Marburg and Justus Liebig University Giessen, Marburg, Germany
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20
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Powers KG, Ma XM, Eipper BA, Mains RE. Cell-type specific knockout of peptidylglycine α-amidating monooxygenase reveals specific behavioral roles in excitatory forebrain neurons and cardiomyocytes. Genes Brain Behav 2020; 20:e12699. [PMID: 32902163 DOI: 10.1111/gbb.12699] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 09/05/2020] [Accepted: 09/07/2020] [Indexed: 01/11/2023]
Abstract
Neuropeptides and peptide hormones play a crucial role in integrating the many factors that affect physiologic and cognitive processes. The potency of many of these peptides requires an amidated amino acid at the C-terminus; a single enzyme, peptidylglycine α-amidating monooxygenase (PAM), catalyzes this modification. Anxiety-like behavior is known to be altered in mice with a single functional Pam allele (Pam+/- ) and in mice unable to express Pam in excitatory forebrain neurons (PamEmx1-cKO/cKO ) or in cardiomyocytes (PamMyh6-cKO/cKO ). Examination of PAM-positive and glutamic acid decarboxylase 67 (GAD)-positive cells in the amygdala of PamEmx1-cKO/cKO mice demonstrated the absence of PAM in pyramidal neurons and its continued presence in GAD-positive interneurons, suggestive of altered excitatory/inhibitory balance. Additional behavioral tests were used to search for functional alterations in these cell-type specific knockout mice. PamEmx1-cKO/cKO mice exhibited a less focused search pattern for the Barnes Maze escape hole than control or PamMyh6-cKO/cKO mice. While wildtype mice favor interacting with novel objects as opposed to familiar objects, both PamEmx1-cKO/cKO and PamMyh6-cKO/cKO mice exhibited significantly less interest in the novel object. Since PAM levels in the central nervous system of PamMyh6-cKO/cKO mice are unaltered, the behavioral effect observed in these mice may reflect their inability to produce atrial granules and the resulting reduction in serum levels of atrial natriuretic peptide. In the sociability test, male mice of all three genotypes spent more time with same-sex stranger mice; while control females showed no preference for stranger mice, female PamEmx1-cKO/cKO mice showed preference for same-sex stranger mice in all trials.
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Affiliation(s)
- Kathryn G Powers
- Department of Neuroscience, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Xin-Ming Ma
- Department of Neuroscience, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Betty A Eipper
- Department of Neuroscience, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Richard E Mains
- Department of Neuroscience, University of Connecticut Health Center, Farmington, Connecticut, USA
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21
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Singh G, Singh U, Singh S, Singh S. Immunogenetic Study of Diabetes Mellitus in Relation to HLA DQ and DR. Indian J Endocrinol Metab 2020; 24:325-332. [PMID: 33088755 PMCID: PMC7540833 DOI: 10.4103/ijem.ijem_564_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 12/05/2019] [Accepted: 06/25/2020] [Indexed: 12/16/2022] Open
Abstract
INTRODUCTION Type-1 diabetes mellitus (T1DM) which is also known as insulin-dependent diabetes is diagnosed mainly during childhood and accounts for approximately 5%-10% of all cases of DM. In India, early onset diabetes (<15 years age) constitutes about 1%-4% of the total diabetic population. The insulitis as well as to a humoral (B cell) response with production of antibodies to IAA, GAD, and the protein tyrosine phosphatase IA2 (IA-2AA) is the main pathogenesis of T1DM. Human leukocyte antigen (HLA)-DR and DQ contributes approximately 40%-50% of the inherited susceptibility for T1DM and most frequently involved haplotypes are DRB1*0301-DQB1*0201, DRB1*0301-DQA1*0501-DQB1*0201, and DRB1*0401-DQB1*0302. METHOD AND MATERIAL Total 70 cases of DM in age group of 10 years to 65 years and 25 healthy controls of same age group 30 cases of complicated diabetic mellitus were included in the study. 2 mL blood was taken in an EDTA vial for HLA typing and 5 mL blood was taken in a plain vial for anti-GAD antibody. HLA DQB1 and DRB1 were done by sequence specific priming polymerase chain reaction method. Indirect immunofluorescent test was used for anti-GAD antibody. Statistical analysis was performed using SPSS version-16. RESULTS Total 40.9% cases of type-I DM were found seropositive for anti-GAD antibody. None of the cases of type-II DM was anti-GAD antibody positive. HLA DRB1*03010 were significantly more in diabetic patient (P < 0.011) as compared to control. DRB1*O403/6 shows that a relative risk of 1.08 was slightly more frequent in DM cases as compared to the control. DQB1*0201 was significantly high (P < 0.004) in DM patient as compared to control with a relative risk of 1.68. Correlation of DR, DQ antigen with types of DM showed that in type-I DM, DRB1*03010 was significantly high (P = 0.009) with a relative risk of 2.78 as compared type-II DM. In DQ typing, DQB1*0201 was significantly high in type-I DM in comparison to type-II DM (65% vs. 30%, P = 0.026, RR = 2.05). Comparison of DQB1 in type-I DM with healthy control showed that DQB1*0201 was significantly high in type-I DM as compared to healthy control (P = 0.0003, RR = 3.09). In type-I DM patient's homozygosity at DRB1*03010, DRB1*03010 was significantly high as compared to the control (P < 0.047, RR = 2.33). Correlation of anti-GAD antibody with DRB1 and DQB1 showed that 77.7% anti-GAD antibody positive cases were DRB1*03010 positive. Similarly, in DQB1 typing, 66.6% anti-GAD positive cases have DQB1*0201. CONCLUSION Prevalence of anti-GAD antibody in Indian population was found up to 45%. HLA DRB1*3010 and HLA DQB1*0201 were the most susceptible haplotypes for type-I DM. HLA DRB1*14 and HLA DRB1*15 were the protective haplotypes for type-I DM. Susceptibility to type-I DM increases when the homozygosity for DRB1*03010 was present. Diagnosis of type-I DM by anti-GAD antibody was possible in only 40.9% cases but if DRB1 and DQB1 typing is added in the diagnosis then diagnostic efficacy increases up to 83%.
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Affiliation(s)
- Gyanendra Singh
- Department of Pathology, Institute of Medical Sciences, BHU, Varanasi, Uttar Pradesh, India
| | - Usha Singh
- Department of Pathology, Institute of Medical Sciences, BHU, Varanasi, Uttar Pradesh, India
| | - S.K Singh
- Department of Endocrinology and, Institute of Medical Sciences, BHU, Varanasi, Uttar Pradesh, India
| | - Shailja Singh
- Former PHD Scholar, Institute of Medical Sciences, BHU, Varanasi, Uttar Pradesh, India
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22
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Ferreira-Junior NC, Ruggeri A, Silva SD, Zampieri TT, Ceroni A, Michelini LC. Exercise training increases GAD65 expression, restores the depressed GABA A receptor function within the PVN and reduces sympathetic modulation in hypertension. Physiol Rep 2020; 7:e14107. [PMID: 31264387 PMCID: PMC6603325 DOI: 10.14814/phy2.14107] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 05/09/2019] [Indexed: 11/24/2022] Open
Abstract
GABAergic inhibitory input within the paraventricular hypothalamic nucleus (PVN) plays a key role in restraining sympathetic outflow. Although experimental evidence has shown depressed GABAA receptor function plus sympathoexcitation in hypertension and augmented GABA levels with reduced sympathetic activity after exercise training (T), the mechanisms underlying T‐induced effects remain unclear. Here we investigated in T and sedentary (S) SHR and WKY: (1) time‐course changes of hemodynamic parameters and PVN glutamic acid decarboxylase (GAD) isoforms’ expression; (2) arterial pressure (AP) and heart rate (HR) responses, sympathetic/parasympathetic modulation of heart and vessels and baroreflex sensitivity to GABAA receptor blockade within the PVN. SHR‐S versus WKY‐S exhibited higher AP and HR, increased sympathetic reduced parasympathetic modulation, smaller baroreflex sensitivity, and reduced PVN GAD65 immunoreactivity. SHR‐T and WKY‐T showed prompt maintained increase (2–8 weeks) in GAD65 expression (responsible for GABA vesicular pool synthesis), which occurred simultaneously with HR reduction in SHR‐T and preceded MAP fall in SHR‐T and resting bradycardia in WKY‐T. There was no change in GAD67 expression (mainly involved with GABA metabolic pool). Resting HR in both groups and basal MAP in SHR were negatively correlated with PVN GAD65 expression. Normalized baroreflex sensitivity and autonomic control observed only in SHR‐T were due to recovery of GABAA receptor function into the PVN since bicuculline administration abolished these effects. Data indicated that training augments in both groups the expression/activity of GABAergic neurotransmission within presympathetic PVN neurons and restores GABAA receptors′ function specifically in the SHR, therefore strengthening GABAergic modulation of sympathetic outflow in hypertension.
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Affiliation(s)
- Nilson C Ferreira-Junior
- Department of Physiology & Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Adriana Ruggeri
- Department of Physiology & Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Sebastião D Silva
- Department of Physiology & Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Thais T Zampieri
- Department of Physiology & Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Alexandre Ceroni
- Department of Physiology & Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Lisete C Michelini
- Department of Physiology & Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil
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23
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Dade M, Berzero G, Izquierdo C, Giry M, Benazra M, Delattre JY, Psimaras D, Alentorn A. Neurological Syndromes Associated with Anti-GAD Antibodies. Int J Mol Sci 2020; 21:E3701. [PMID: 32456344 PMCID: PMC7279468 DOI: 10.3390/ijms21103701] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 05/19/2020] [Accepted: 05/21/2020] [Indexed: 12/11/2022] Open
Abstract
Glutamic acid decarboxylase (GAD) is an intracellular enzyme whose physiologic function is the decarboxylation of glutamate to gamma-aminobutyric acid (GABA), the main inhibitory neurotransmitter within the central nervous system. GAD antibodies (Ab) have been associated with multiple neurological syndromes, including stiff-person syndrome, cerebellar ataxia, and limbic encephalitis, which are all considered to result from reduced GABAergic transmission. The pathogenic role of GAD Ab is still debated, and some evidence suggests that GAD autoimmunity might primarily be cell-mediated. Diagnosis relies on the detection of high titers of GAD Ab in serum and/or in the detection of GAD Ab in the cerebrospinal fluid. Due to the relative rarity of these syndromes, treatment schemes and predictors of response are poorly defined, highlighting the unmet need for multicentric prospective trials in this population. Here, we reviewed the main clinical characteristics of neurological syndromes associated with GAD Ab, focusing on pathophysiologic mechanisms.
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Affiliation(s)
- Maëlle Dade
- AP-HP, Groupe Hospitalier Pitié-Salpêtrière, Service de Neurologie 2-Mazarin, 75013 Paris, France; (M.D.); (G.B.); (J.-Y.D.); (D.P.)
- Sorbonne Université, Inserm, CNRS, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, 75013 Paris, France; (M.G.); (M.B.)
| | - Giulia Berzero
- AP-HP, Groupe Hospitalier Pitié-Salpêtrière, Service de Neurologie 2-Mazarin, 75013 Paris, France; (M.D.); (G.B.); (J.-Y.D.); (D.P.)
- Sorbonne Université, Inserm, CNRS, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, 75013 Paris, France; (M.G.); (M.B.)
- Neuroncology Unit, IRCCS Mondino Foundation, 27100 Pavia, Italy
| | - Cristina Izquierdo
- Department of Neuroscience, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona, 08916 Badalona, Spain;
| | - Marine Giry
- Sorbonne Université, Inserm, CNRS, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, 75013 Paris, France; (M.G.); (M.B.)
| | - Marion Benazra
- Sorbonne Université, Inserm, CNRS, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, 75013 Paris, France; (M.G.); (M.B.)
| | - Jean-Yves Delattre
- AP-HP, Groupe Hospitalier Pitié-Salpêtrière, Service de Neurologie 2-Mazarin, 75013 Paris, France; (M.D.); (G.B.); (J.-Y.D.); (D.P.)
- Sorbonne Université, Inserm, CNRS, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, 75013 Paris, France; (M.G.); (M.B.)
| | - Dimitri Psimaras
- AP-HP, Groupe Hospitalier Pitié-Salpêtrière, Service de Neurologie 2-Mazarin, 75013 Paris, France; (M.D.); (G.B.); (J.-Y.D.); (D.P.)
- Sorbonne Université, Inserm, CNRS, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, 75013 Paris, France; (M.G.); (M.B.)
| | - Agusti Alentorn
- AP-HP, Groupe Hospitalier Pitié-Salpêtrière, Service de Neurologie 2-Mazarin, 75013 Paris, France; (M.D.); (G.B.); (J.-Y.D.); (D.P.)
- Sorbonne Université, Inserm, CNRS, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, 75013 Paris, France; (M.G.); (M.B.)
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Kanao-Kanda M, Kanda H, Liu S, Roy S, Toborek M, Hao S. Viral Vector-Mediated Gene Transfer of Glutamic Acid Decarboxylase for Chronic Pain Treatment: A Literature Review. Hum Gene Ther 2020; 31:405-414. [PMID: 32041431 DOI: 10.1089/hum.2019.359] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Chronic pain is long-lasting nociceptive state, impairing the patient's quality of life. Existing analgesics are generally not effective in the treatment of chronic pain, some of which such as opioids have the risk of tolerance/dependence and overdose death with higher daily opioid doses for increasing analgesic effect. Opioid use disorders have already reached an epidemic level in the United States; therefore, nonopioid analgesic approach and/or use of nonpharmacologic interventions will be employed with increasing frequency. Viral vector-mediated gene therapy is promising in clinical trials in the nervous system diseases. Glutamic acid decarboxylase (GAD) enzyme, a key enzyme in biosynthesis of γ-aminobutyric acid (GABA), plays an important role in analgesic mechanism. In the literature review, we used PubMed and bioRxiv to search the studies, and the eligible criteria include (1) article written in English, (2) use of viral vectors expressing GAD67 or GAD65, and (3) preclinical pain models. We identified 13 eligible original research articles, in which the pain models include nerve injury, HIV-related pain, painful diabetic neuropathy, and formalin test. GAD expressed by the viral vectors from all the reports produced antinociceptive effects. Restoring GABA systems is a promising therapeutic strategy for chronic pain, which provides evidence for the clinical trial of gene therapy for pain in the near future.
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Affiliation(s)
- Megumi Kanao-Kanda
- Department of Anesthesiology, University of Miami Miller School of Medicine, Miami, Florida.,Department of Surgery, University of Miami Miller School of Medicine, Miami, Florida
| | - Hirotsugu Kanda
- Department of Anesthesiology, University of Miami Miller School of Medicine, Miami, Florida.,Department of Surgery, University of Miami Miller School of Medicine, Miami, Florida
| | - Shue Liu
- Department of Anesthesiology, University of Miami Miller School of Medicine, Miami, Florida
| | - Sabita Roy
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, Florida
| | - Michal Toborek
- Department of Anesthesiology & Critical Care Medicine, Asahikawa Medical University, Asahikawa, Japan
| | - Shuanglin Hao
- Department of Anesthesiology, University of Miami Miller School of Medicine, Miami, Florida
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Young WS, Song J. Characterization of Oxytocin Receptor Expression Within Various Neuronal Populations of the Mouse Dorsal Hippocampus. Front Mol Neurosci 2020; 13:40. [PMID: 32256314 PMCID: PMC7093644 DOI: 10.3389/fnmol.2020.00040] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 02/28/2020] [Indexed: 11/30/2022] Open
Abstract
Oxytocin, acting through the oxytocin receptor (Oxtr) in the periphery, is best known for its roles in regulating parturition and lactation. However, it is also now known to possess a number of important social functions within the central nervous system, including social preference, memory and aggression, that vary to different degrees in different species. The Oxtr is found in both excitatory and inhibitory neurons within the brain and research is focusing on how, for example, activation of the receptor in interneurons can enhance the signal-to-noise of neuronal transmission. It is important to understand which neurons in the mouse dorsal hippocampus might be activated during memory formation. Therefore, we examined the colocalization of transcripts in over 5,000 neurons for Oxtr with those for nine different markers often found in interneurons using hairpin chain reaction in situ hybridization on hippocampal sections. Most pyramidal cell neurons of CA2 and many in the CA3 express Oxtr. Outside of those excitatory neurons, over 90% of Oxtr-expressing neurons co-express glutamic acid decarboxylase-1 (Gad-1) with progressively decreasing numbers of co-expressing cholecystokinin, somatostatin, parvalbumin, neuronal nitric oxide synthase, the serotonin 3a receptor, the vesicular glutamate transporter 3, calbindin 2 (calretinin), and vasoactive intestinal polypeptide neurons. Distributions were analyzed within hippocampal layers and regions as well. These findings indicate that Oxtr activation will modulate the activity of ~30% of the Gad-1 interneurons and the majority of the diverse population of those, mostly, interneuron types specifically examined in the mouse hippocampus.
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Affiliation(s)
- W. Scott Young
- Section on Neural Gene Expression, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, United States
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Kobayashi S, Kim J, Yanagawa Y, Suzuki N, Saito H, Takayama C. Hyper-Formation of GABA and Glycine Co-Releasing Terminals in the Mouse Cerebellar Nuclei after Deprivation of GABAergic Inputs from Purkinje Cells. Neuroscience 2019; 426:88-100. [PMID: 31846755 DOI: 10.1016/j.neuroscience.2019.11.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 11/11/2019] [Accepted: 11/19/2019] [Indexed: 11/27/2022]
Abstract
GABA and glycine are inhibitory neurotransmitters. However, the mechanisms underlying the formation of GABAergic and glycinergic synapses remain unclear. The influence of GABAergic input deprivation on inhibitory terminal formation was investigated using Purkinje cell (PC)-specific vesicular GABA transporter (VGAT) knockout (L7-VGAT) mice, in which GABA release from PCs diminishes in an age-dependent manner. We compared the late development of GABAergic and glycinergic terminals in the cerebellar nucleus (CN) between control and L7-VGAT mice. In the control CN, the density of glutamate decarboxylase (GAD)-positive dots remained unchanged between postnatal 2 months (P2M) and 13 months (P13M), whereas glycine transporter 2 (GlyT2)-positive dots increased in density during this time frame. No difference in the density of GlyT2-positive dots was observed between control and L7-VGAT mice at P2M, but the density was significantly higher in the L7-VGAT fastigial nuclei (FN) than the control FN at P13M. When VGAT was absent from PC terminals, GlyT2-positive dots included GAD and VGAT and formed synapses. These results indicated that GABAergic terminals were formed by P2M, glycinergic terminals were actively formed after P2M, and more glycinergic terminals were formed in the L7-VGAT FN than in the control FN, suggesting that the increased glycinergic terminals may derive from interneurons within the FN and may also release GABA. These results suggest that the deprivation of GABAergic inputs from PCs may accelerate the formation of co-releasing terminals derived from interneurons and that the inhibitory terminal numbers and types may be regulated by the quantity of functional GABAergic inputs.
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Affiliation(s)
- Shiori Kobayashi
- Department of Molecular Anatomy, School of Medicine, University of the Ryukyus, Uehara 207, Nishihara, Okinawa 9030215, Japan
| | - Jeongtae Kim
- Department of Molecular Anatomy, School of Medicine, University of the Ryukyus, Uehara 207, Nishihara, Okinawa 9030215, Japan; Department of Veterinary Anatomy, College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University, Jeju 63243, Republic of Korea
| | - Yuchio Yanagawa
- Department of Genetic and Behavioral Neuroscience, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma 371-8511, Japan
| | - Noboru Suzuki
- Department of Animal Functional Genomics of Advanced Science Research Promotion Center, Mie University Organization for the Promotion of Regional Innovation, 2-174 Edobashi, Tsu, Mie 5148507, Japan
| | - Hiromitsu Saito
- Department of Animal Functional Genomics of Advanced Science Research Promotion Center, Mie University Organization for the Promotion of Regional Innovation, 2-174 Edobashi, Tsu, Mie 5148507, Japan
| | - Chitoshi Takayama
- Department of Molecular Anatomy, School of Medicine, University of the Ryukyus, Uehara 207, Nishihara, Okinawa 9030215, Japan.
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27
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Abstract
Gamma-aminobutyric acid (GABA) plays important roles in host physiology. However, the effects of GABA are greatly restricted due to its low bioavailability in the human body. Here, a high acid-tolerance GABA-producing strain, Lactobacillus brevis Bmb5, was isolated from kimchi. Bmb5 converted glutamate to GABA (7.23 ± 0.68 µg/µl) at a rate of 72.3%. The expression of gadB gene, encoding the enzyme involved in the decarboxylation of glutamate to GABA, was decreased upon incubation. Our findings indicate GABA production in Bmb5 is not directly correlated with gadB gene expression, providing new insight into the mechanisms underlying GABA production in Lactobacillus.
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Affiliation(s)
- Anna Jong
- Division of Animal Science, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Cheng Chung Yong
- Division of Animal Science, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Sejong Oh
- Division of Animal Science, Chonnam National University, Gwangju 61186, Republic of Korea
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28
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Chowdhury TG, Wable GS, Chen YW, Tateyama K, Yu I, Wang JY, Reyes AD, Aoki C. Voluntary Wheel Running Exercise Evoked by Food-Restriction Stress Exacerbates Weight Loss of Adolescent Female Rats But Also Promotes Resilience by Enhancing GABAergic Inhibition of Pyramidal Neurons in the Dorsal Hippocampus. Cereb Cortex 2019; 29:4035-4049. [PMID: 30462186 PMCID: PMC6931273 DOI: 10.1093/cercor/bhy283] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 10/11/2018] [Accepted: 10/17/2018] [Indexed: 11/13/2022] Open
Abstract
Adolescence is marked by increased vulnerability to mental disorders and maladaptive behaviors, including anorexia nervosa. Food-restriction (FR) stress evokes foraging, which translates to increased wheel running exercise (EX) for caged rodents, a maladaptive behavior, since it does not improve food access and exacerbates weight loss. While almost all adolescent rodents increase EX following FR, some then become resilient by suppressing EX by the second-fourth FR day, which minimizes weight loss. We asked whether GABAergic plasticity in the hippocampus may underlie this gain in resilience. In vitro slice physiology revealed doubling of pyramidal neurons' GABA response in the dorsal hippocampus of food-restricted animals with wheel access (FR + EX for 4 days), but without increase of mIPSC amplitudes. mIPSC frequency increased by 46%, but electron microscopy revealed no increase in axosomatic GABAergic synapse number onto pyramidal cells and only a modest increase (26%) of GABAergic synapse lengths. These changes suggest increase of vesicular release probability and extrasynaptic GABAA receptors and unsilencing of GABAergic synapses. GABAergic synapse lengths correlated with individual's suppression of wheel running and weight loss. These analyses indicate that EX can have dual roles-exacerbate weight loss but also promote resilience to some by dampening hippocampal excitability.
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Affiliation(s)
| | | | - Yi-Wen Chen
- Center for Neural Science, NYU, New York, NY, USA
| | - Kei Tateyama
- Center for Neural Science, NYU, New York, NY, USA
| | - Irene Yu
- Center for Neural Science, NYU, New York, NY, USA
| | - Jia-Yi Wang
- Center for Neural Science, NYU, New York, NY, USA
| | - Alex D Reyes
- Center for Neural Science, NYU, New York, NY, USA
| | - Chiye Aoki
- Center for Neural Science, NYU, New York, NY, USA
- The Neuroscience Institute, NYU Langone Medical Center, New York, NY, USA
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29
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Grill V, Åsvold BO. A form of Autoimmune Diabetes in Adults Named LADA - An Update on Essential Features and Controversies. Curr Diabetes Rev 2019; 15:172-173. [PMID: 30009712 DOI: 10.2174/1573399814666180716152342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 04/29/2018] [Accepted: 06/13/2018] [Indexed: 01/21/2023]
Abstract
Latent Autoimmune Diabetes in the Adult, LADA has been investigated less than "classical" type 1 and type 2 diabetes and the criteria for and the relevance of a LADA diagnosis has been challenged. Despite the absence of a genetic background that is exclusive to LADA, this form of diabetes displays phenotypic characteristics that distinguish it from other forms of diabetes. LADA is heterogeneous in terms of the impact of autoimmunity and lifestyle factors, something that poses problems as to therapy and follow-up perhaps particularly in those with marginal positivity. Yet, there appears to be clear clinical utility in classifying individuals as LADA.
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Affiliation(s)
- Valdemar Grill
- Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
| | - Bjørn O Åsvold
- K.G. Jebsen Center for Genetic Epidemiology, Department of Public Health and Nursing, NTNU, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
- Department of Endocrinology, St. Olavs Hospital, Trondheim University Hospital, NO-7006 Trondheim, Norway
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Trisorus C, Aroonparkmongkol S, Kongmanas HB, Sahakitrungruang T. Prevalence of islet autoantibodies in Thai juvenile-onset type 1 diabetes. Pediatr Int 2018; 60:1002-1007. [PMID: 30151912 DOI: 10.1111/ped.13687] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 05/29/2018] [Accepted: 08/17/2018] [Indexed: 12/16/2022]
Abstract
BACKGROUND Type 1 diabetes mellitus (T1DM) is caused by autoimmune destruction of islet β-cells of the pancreas. There are overlapping phenotypes in a significant proportion of youth with type 1 and 2 diabetes. Thus, positive pancreatic autoantibodies are helpful to diagnose T1DM. Zinc transporter 8 antibody (ZnT8A) is a recently identified autoantibody in T1DM and no data on ZnT8A in the Thai population have been reported. The aim of this study was therefore to estimate the prevalence of ZnT8A in Thai juvenile-onset T1DM and to evaluate its diagnostic value relative to glutamic acid decarboxylase and insulinoma-2 antigen antibodies (GADA and IA2A). METHODS In this cross-sectional study, patients with T1DM diagnosed before age 15 years, and disease duration <10 years were enrolled. Serum ZnT8A, GADA, and IA2A were measured using commercial enzyme-linked immunosorbent assay kits. RESULTS The subjects consisted of 81 youths (30 boys, 51 girls) aged 12.3 ± 4.5 years with T1DM. The median diabetes duration was 3 years (range, 0-10 years). The prevalence of ZnT8A, GADA, and IA2A was 54.3%, 75.3%, and 45.7%, respectively. ZnT8A were detected in 16% of T1DM patients negative for both GADA and IA2A. A combination of ZnT8A, GADA and IA2A could detect 80.2% of patients with T1DM. Combined use of ZnT8A and GADA identified 100% of antibody-positive patients. CONCLUSION The prevalence of ZnT8A in Thai juvenile-onset T1DM appears to be higher than in previous studies from Asia. ZnT8A could replace IA2A as an autoimmunity marker in Thai pediatric T1DM patients, with better diagnostic performance.
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Affiliation(s)
- Chayanis Trisorus
- Division of Pediatric Endocrinology, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.,King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
| | - Suphab Aroonparkmongkol
- Division of Pediatric Endocrinology, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.,King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
| | - Hataichanok Bansiddhi Kongmanas
- Division of Pediatric Endocrinology, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.,King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
| | - Taninee Sahakitrungruang
- Division of Pediatric Endocrinology, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.,King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
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31
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Popkirov S, Sebastian S, Ismail FS, Wellmer J. Latent autoimmune diabetes and limbic encephalitis with antibodies against glutamic acid decarboxylase. J Diabetes 2018; 10:338-340. [PMID: 29154389 DOI: 10.1111/1753-0407.12627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 11/03/2017] [Accepted: 11/14/2017] [Indexed: 11/30/2022] Open
Affiliation(s)
- Stoyan Popkirov
- Ruhr-Epileptology, Department of Neurology, University Hospital Knappschaftskrankenhaus Bochum, Ruhr-University Bochum, Bochum, Germany
| | - Seena Sebastian
- Ruhr-Epileptology, Department of Neurology, University Hospital Knappschaftskrankenhaus Bochum, Ruhr-University Bochum, Bochum, Germany
| | - Fatme S Ismail
- Ruhr-Epileptology, Department of Neurology, University Hospital Knappschaftskrankenhaus Bochum, Ruhr-University Bochum, Bochum, Germany
| | - Jörg Wellmer
- Ruhr-Epileptology, Department of Neurology, University Hospital Knappschaftskrankenhaus Bochum, Ruhr-University Bochum, Bochum, Germany
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32
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Fish KN, Rocco BR, Lewis DA. Laminar Distribution of Subsets of GABAergic Axon Terminals in Human Prefrontal Cortex. Front Neuroanat 2018; 12:9. [PMID: 29503610 PMCID: PMC5820353 DOI: 10.3389/fnana.2018.00009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 01/24/2018] [Indexed: 01/01/2023] Open
Abstract
In human prefrontal cortex (PFC), ~85% of γ-aminobutyric acid (GABA)-expressing neurons can be subdivided into non-overlapping groups by the presence of calbindin (CB), calretinin (CR) or parvalbumin (PV). Substantial research has focused on the differences in the laminar locations of the cells bodies of these neurons, with limited attention to the distribution of their axon terminals, their sites of action. We previously reported that in non-human primates subtypes of these cells are distinguishable by differences in terminal protein levels of the GABA synthesizing enzymes glutamic acid decarboxylase 65 (GAD65) and GAD67. Here we used multi-label fluorescence microscopy in human PFC to assess: (1) the laminar distributions of axon terminals containing CB, CR, or PV; and (2) the relative protein levels of GAD65, GAD67 and vesicular GABA transporter (vGAT) in CB, CR and PV terminals. The densities of the different CB, CR and PV terminal subpopulations differed across layers of the PFC. PV terminals comprised two subsets based on the presence of only GAD67 (GAD67+) or both GADs (GAD65/GAD67+), whereas CB and CR terminals comprised three subsets (GAD65+, GAD67+, or GAD65/GAD67+). The densities of the different CB, CR and PV GAD terminal subpopulations also differed across layers. Finally, within each of the three calcium-binding protein subpopulations intra-terminal protein levels of GAD and vGAT differed by GAD subpopulation. These findings are discussed in the context of the laminar distributions of CB, CR and PV cell bodies and the synaptic targets of their axons.
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Affiliation(s)
- Kenneth N Fish
- Western Psychiatric Institute and Clinic, Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Brad R Rocco
- Western Psychiatric Institute and Clinic, Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - David A Lewis
- Western Psychiatric Institute and Clinic, Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States.,Department of Neuroscience, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
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33
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Wu Q, Shah NP. High γ-aminobutyric acid production from lactic acid bacteria: Emphasis on Lactobacillus brevis as a functional dairy starter. Crit Rev Food Sci Nutr 2018; 57:3661-3672. [PMID: 26980301 DOI: 10.1080/10408398.2016.1147418] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
γ-Aminobutyric acid (GABA) and GABA-rich foods have shown anti-hypertensive and anti-depressant activities as the major functions in humans and animals. Hence, high GABA-producing lactic acid bacteria (LAB) could be used as functional starters for manufacturing novel fermented dairy foods. Glutamic acid decarboxylases (GADs) from LAB are highly conserved at the species level based on the phylogenetic tree of GADs from LAB. Moreover, two functionally distinct GADs and one intact gad operon were observed in all the completely sequenced Lactobacillus brevis strains suggesting its common capability to synthesize GABA. Difficulties and strategies for the manufacture of GABA-rich fermented dairy foods have been discussed and proposed, respectively. In addition, a genetic survey on the sequenced LAB strains demonstrated the absence of cell envelope proteinases in the majority of LAB including Lb. brevis, which diminishes their cell viabilities in milk environments due to their non-proteolytic nature. Thus, several strategies have been proposed to overcome the non-proteolytic nature of Lb. brevis in order to produce GABA-rich dairy foods.
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Affiliation(s)
- Qinglong Wu
- a Food and Nutritional Science, School of Biological Sciences , The University of Hong Kong , Hong Kong , Hong Kong
| | - Nagendra P Shah
- a Food and Nutritional Science, School of Biological Sciences , The University of Hong Kong , Hong Kong , Hong Kong
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34
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Grain R, Lally J, Stubbs B, Malik S, LeMince A, Nicholson TR, Murray RM, Gaughran F. Autoantibodies against voltage-gated potassium channel and glutamic acid decarboxylase in psychosis: A systematic review, meta-analysis, and case series. Psychiatry Clin Neurosci 2017; 71:678-689. [PMID: 28573688 DOI: 10.1111/pcn.12543] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 05/17/2017] [Accepted: 05/19/2017] [Indexed: 01/21/2023]
Abstract
Antibodies to the voltage-gated potassium channel (VGKC) complex and glutamic acid decarboxylase (GAD) have been reported in some cases of psychosis. We conducted the first systematic review and meta-analysis to investigate their prevalence in people with psychosis and report a case series of VGKC-complex antibodies in refractory psychosis. Only five studies presenting prevalence rates of VGKC seropositivity in psychosis were identified, in addition to our case series, with an overall prevalence of 1.5% (25/1720) compared to 0.7% in healthy controls (12/1753). Meta-analysis established that the pooled prevalence of GAD65 autoantibodies was 5.8% (95% confidence interval [CI]: 2.0-15.6%; I2 = 91%; nine studies) in psychotic disorders, with a prevalence of 4.6% (95%CI: 1.2-15.9%; nine studies; I2 = 89%) and 6.2% (95%CI: 1.2-27.0%; two studies; I2 = 69%) in schizophrenia and bipolar disorder, respectively. People with psychosis were more likely to have GAD65 antibodies than controls (odds ratio [OR], 2.24; 95%CI: 1.28-3.92%; P = 0.005; eight studies; I2 = 0%). Among 21 participants with treatment-resistant psychosis, none had VGKC antibodies. The prevalence of VGKC antibodies is low in psychosis. Our preliminary meta-analysis suggests that GAD autoantibodies are more common in people with psychosis than in controls, although few studies accounted for the possibility of co-existing type 1 diabetes mellitus and the clinical significance of reported GAD titers remains unclear. The paucity of studies reporting thresholds for defining GAD abnormality and rates of comorbid type 1 diabetes mellitus precludes interpretations regarding the influence of GAD antibodies on the development of psychotic disorders and may have led to an overestimate of the prevalence of GAD. Our case series fails to support the hypothesis that VGKC antibodies are linked to treatment resistance in psychosis, but the literature to date is remarkably sparse.
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Affiliation(s)
- Rosemary Grain
- GKT School of Medicine, King's College London, London, UK
| | - John Lally
- Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.,National Psychosis Service, South London and Maudsley NHS Foundation Trust, London, UK.,Department of Psychiatry, Royal College of Surgeons in Ireland, Beaumont Hospital, Dublin, Ireland.,Department of Psychiatry, University College Dublin, Dublin, Ireland
| | - Brendon Stubbs
- Physiotherapy Department, South London and Maudsley NHS Foundation Trust, London, UK.,Health Service and Population Research Department, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Steffi Malik
- Medical School, University of Bristol, Bristol, UK
| | - Anne LeMince
- National Psychosis Service, South London and Maudsley NHS Foundation Trust, London, UK
| | - Timothy R Nicholson
- Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Robin M Murray
- Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.,National Psychosis Service, South London and Maudsley NHS Foundation Trust, London, UK
| | - Fiona Gaughran
- Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.,National Psychosis Service, South London and Maudsley NHS Foundation Trust, London, UK.,The Collaboration for Leadership in Applied Health Research and Care (CLAHRC), South London Psychosis Research Team, London, UK
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35
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Abstract
Stiff-person syndrome (SPS) is a rare disorder that affects the central nervous system and is characterized by progressive muscle stiffness, rigidity, and spasm of axial and limb muscles. The syndrome is caused by a lack of gamma aminobutyric acid (GABA), which occurs because of antibodies against glutamic acid decarboxylase (GAD), an essential enzyme for GABA synthesis. Hence, the patients present with increased muscular activity. In this article, we will discuss two case studies of stiff-person syndrome.
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Affiliation(s)
| | - Hassaan Tohid
- Research, California Instititute of Behavioral Neurosciences and Psychology, Fairfield, USA
| | - Rebecca Brown
- Neurology, New York Institute of Technology College of Osteopathic Medicine, Long Island, USA
| | - Samia Qazi
- Internal Medicine, New York Institute of Technology College of Osteopathic Medicine, Long Island, USA
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36
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Le TN, Zhou QP, Cobos I, Zhang S, Zagozewski J, Japoni S, Vriend J, Parkinson T, Du G, Rubenstein JL, Eisenstat DD. GABAergic Interneuron Differentiation in the Basal Forebrain Is Mediated through Direct Regulation of Glutamic Acid Decarboxylase Isoforms by Dlx Homeobox Transcription Factors. J Neurosci 2017; 37:8816-29. [PMID: 28821666 DOI: 10.1523/JNEUROSCI.2125-16.2017] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Revised: 06/25/2017] [Accepted: 08/03/2017] [Indexed: 01/09/2023] Open
Abstract
GABA is the key inhibitory neurotransmitter in the cortex but regulation of its synthesis during forebrain development is poorly understood. In the telencephalon, members of the distal-less (Dlx) homeobox gene family are expressed in, and regulate the development of, the basal ganglia primodia from which many GABAergic neurons originate and migrate to other forebrain regions. The Dlx1/Dlx2 double knock-out mice die at birth with abnormal cortical development, including loss of tangential migration of GABAergic inhibitory interneurons to the neocortex (Anderson et al., 1997a). We have discovered that specific promoter regulatory elements of glutamic acid decarboxylase isoforms (Gad1 and Gad2), which regulate GABA synthesis from the excitatory neurotransmitter glutamate, are direct transcriptional targets of both DLX1 and DLX2 homeoproteins in vivo Further gain- and loss-of-function studies in vitro and in vivo demonstrated that both DLX1 and DLX2 are necessary and sufficient for Gad gene expression. DLX1 and/or DLX2 activated the transcription of both Gad genes, and defects in Dlx function disrupted the differentiation of GABAergic interneurons with global reduction in GABA levels in the forebrains of the Dlx1/Dlx2 double knock-out mouse in vivo Identification of Gad genes as direct Dlx transcriptional targets is significant; it extends our understanding of Dlx gene function in the developing forebrain beyond the regulation of tangential interneuron migration to the differentiation of GABAergic interneurons arising from the basal telencephalon, and may help to unravel the pathogenesis of several developmental brain disorders.SIGNIFICANCE STATEMENT GABA is the major inhibitory neurotransmitter in the brain. We show that Dlx1/Dlx2 homeobox genes regulate GABA synthesis during forebrain development through direct activation of glutamic acid decarboxylase enzyme isoforms that convert glutamate to GABA. This discovery helps explain how Dlx mutations result in abnormal forebrain development, due to defective differentiation, in addition to the loss of tangential migration of GABAergic inhibitory interneurons to the neocortex. Reduced numbers or function of cortical GABAergic neurons may lead to hyperactivity states such as seizures (Cobos et al., 2005) or contribute to the pathogenesis of some autism spectrum disorders. GABAergic dysfunction in the basal ganglia could disrupt the learning and development of complex motor and cognitive behaviors (Rubenstein and Merzenich, 2003).
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37
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Namba H, Nagano T, Jodo E, Eifuku S, Horie M, Takebayashi H, Iwakura Y, Sotoyama H, Takei N, Nawa H. Epidermal growth factor signals attenuate phenotypic and functional development of neocortical GABA neurons. J Neurochem 2017; 142:886-900. [PMID: 28608461 DOI: 10.1111/jnc.14097] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 04/24/2017] [Accepted: 05/23/2017] [Indexed: 01/21/2023]
Abstract
Phenotypic development of neocortical GABA neurons is highly plastic and promoted by various neurotrophic factors such as neuregulin-1. A subpopulation of GABA neurons expresses not only neuregulin receptor (ErbB4) but also epidermal growth factor (EGF) receptor (ErbB1) during development, but the neurobiological action of EGF on this cell population is less understood than that of neuregulin-1. Here, we examined the effects of exogenous EGF on immature GABA neurons both in culture and in vivo and also explored physiological consequences in adults. We prepared low density cultures from the neocortex of rat embryos and treated neocortical neurons with EGF. EGF decreased protein levels of glutamic acid decarboxylases (GAD65 and GAD67), and EGF influences on neuronal survival and glial proliferation were negligible or limited. The EGF treatment also diminished the frequency of miniature inhibitory postsynaptic currents (mIPSCs). In vivo administration of EGF to mouse pups reproduced the above GABAergic phenomena in neocortical culture. In EGF-injected postnatal mice, GAD- and parvalbumin-immunoreactivities were reduced in the frontal cortex. In addition, postnatal EGF treatment decreased mIPSC frequency in, and the density of, GABAergic terminals on pyramidal cells. Although these phenotypic influences on GABA neurons became less marked during development, it later resulted in the reduced β- and γ-powers of sound-evoked electroencephalogram in adults, which is regulated by parvalbumin-positive GABA neurons and implicated in the schizophrenia pathophysiology. These findings suggest that, in contrast to the ErbB4 ligand of neuregulin-1, the ErbB1 ligand of EGF exerts unique maturation-attenuating influences on developing cortical GABAergic neurons.
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Affiliation(s)
- Hisaaki Namba
- Department of Molecular Neurobiology, Brain Research Institute, Niigata University, Chuo-ku, Niigata, Japan
| | - Tadasato Nagano
- Department of Molecular Neurobiology, Brain Research Institute, Niigata University, Chuo-ku, Niigata, Japan.,Department of Health and Nutrition, University of Niigata Prefecture, Higashi-ku, Niigata, Japan
| | - Eiichi Jodo
- Department of Neurophysiology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Satoshi Eifuku
- Department of Neurophysiology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Masao Horie
- Division of Neurobiology and Anatomy, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Hirohide Takebayashi
- Division of Neurobiology and Anatomy, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Yuriko Iwakura
- Department of Molecular Neurobiology, Brain Research Institute, Niigata University, Chuo-ku, Niigata, Japan
| | - Hidekazu Sotoyama
- Department of Molecular Neurobiology, Brain Research Institute, Niigata University, Chuo-ku, Niigata, Japan
| | - Nobuyuki Takei
- Department of Molecular Neurobiology, Brain Research Institute, Niigata University, Chuo-ku, Niigata, Japan
| | - Hiroyuki Nawa
- Department of Molecular Neurobiology, Brain Research Institute, Niigata University, Chuo-ku, Niigata, Japan
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Schultz AJ, Rotterman TM, Dwarakanath A, Alvarez FJ. VGLUT1 synapses and P-boutons on regenerating motoneurons after nerve crush. J Comp Neurol 2017; 525:2876-2889. [PMID: 28543879 DOI: 10.1002/cne.24244] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 05/03/2017] [Accepted: 05/11/2017] [Indexed: 01/05/2023]
Abstract
Stretch-sensitive Ia afferent monosynaptic connections with motoneurons form the stretch reflex circuit. After nerve transection, Ia afferent synapses and stretch reflexes are permanently lost, even after regeneration and reinnervation of muscle by motor and sensory afferents is completed in the periphery. This loss greatly affects full recovery of motor function. However, after nerve crush, reflex muscle forces during stretch do recover after muscle reinnervation and reportedly exceed 140% baseline values. This difference might be explained by structural preservation after crush of Ia afferent synapses on regenerating motoneurons and decreased presynaptic inhibitory control. We tested these possibilities in rats after crushing the tibial nerve (TN), and using Vesicular GLUtamate Transporter 1 (VGLUT1) and the 65 kDa isoform of glutamic acid-decarboxylase (GAD65) as markers of, respectively, Ia afferent synapses and presynaptic inhibition (P-boutons) on retrogradely labeled motoneurons. We analyzed motoneurons during regeneration (21 days post crush) and after they reinnervate muscle (3 months). The results demonstrate a significant loss of VGLUT1 terminals on dendrites and cell bodies at both 21 days and 3 months post-crush. However, in both cellular compartments, the reductions were small compared to those observed after TN full transection. In addition, we found a significant decrease in the number of GAD65 P-boutons per VGLUT1 terminal and their coverage of VGLUT1 boutons. The results support the hypothesis that better preservation of Ia afferent synapses and a change in presynaptic inhibition could contribute to maintain or even increase the stretch reflex after nerve crush and by difference to nerve transection.
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Affiliation(s)
- Adam J Schultz
- Department of Physiology, Emory University, Atlanta, Georgia
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Ohgomori T, Yamasaki R, Takeuchi H, Kadomatsu K, Kira JI, Jinno S. Differential involvement of vesicular and glial glutamate transporters around spinal α-motoneurons in the pathogenesis of SOD1 G93A mouse model of amyotrophic lateral sclerosis. Neuroscience 2017; 356:114-124. [PMID: 28526579 DOI: 10.1016/j.neuroscience.2017.05.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 03/31/2017] [Accepted: 05/08/2017] [Indexed: 12/14/2022]
Abstract
From a view point of the glutamate excitotoxicity theory, several studies have suggested that abnormal glutamate homeostasis via dysfunction of glial glutamate transporter-1 (GLT-1) may underlie neurodegeneration in amyotrophic lateral sclerosis (ALS). However, the detailed role of GLT-1 in the pathogenies of ALS remains controversial. To assess this issue, here we elucidated structural alterations associated with dysregulation of glutamate homeostasis using SOD1G93A mice, a genetic model of familial ALS. We first examined the viability of α-motoneurons in the lumbar spinal cord of SOD1G93A mice. Measurement of the soma size and density indicated that α-motoneurons might be intact at 9weeks of age (presymptomatic stage), then soma shrinkage began at 15weeks of age (progressive stage), and finally neuronal density declined at 21weeks of age (end stage). Next, we carried out the line profile analysis, and found that the coverage of α-motoneurons by GLT-1-positive (GLT-1+) astrocytic processes was decreased only at 21weeks of age, while the reduction of coverage of α-motoneurons by synaptophysin-positive (SYP+) presynaptic terminals began at 15weeks of age. Interestingly, the coverage of α-motoneurons by VGluT2+ presynaptic terminals was transiently increased at 9weeks of age, and then gradually decreased towards 21weeks of age. On the other hand, there were no time-dependent alterations in the coverage of α-motoneurons by GABAergic presynaptic terminals. These findings suggest that VGluT2 and GLT-1 may be differentially involved in the pathogenesis of ALS via abnormal glutamate homeostasis at the presymptomatic stage and end stage of disease, respectively.
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Affiliation(s)
- Tomohiro Ohgomori
- Department of Anatomy and Neuroscience, Graduate School of Medical Science, Kyushu University, Fukuoka 812-8582, Japan
| | - Ryo Yamasaki
- Department of Neurology, Neurological Institute, Graduate School of Medical Science, Kyushu University, Fukuoka 812-8582, Japan
| | - Hideyuki Takeuchi
- Department of Neuroimmunology, Research Institute of Environmental Medicine, Nagoya University, Nagoya 464-8601, Japan; Department of Neurology and Stroke Medicine, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan
| | - Kenji Kadomatsu
- Department of Biochemistry, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Jun-Ichi Kira
- Department of Neurology, Neurological Institute, Graduate School of Medical Science, Kyushu University, Fukuoka 812-8582, Japan
| | - Shozo Jinno
- Department of Anatomy and Neuroscience, Graduate School of Medical Science, Kyushu University, Fukuoka 812-8582, Japan.
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Yin SB, Zhang XG, Chen S, Yang WT, Zheng XW, Zheng GQ. Adenosine A 2A Receptor Gene Knockout Prevents l-3,4-Dihydroxyphenylalanine-Induced Dyskinesia by Downregulation of Striatal GAD67 in 6-OHDA-Lesioned Parkinson's Mice. Front Neurol 2017; 8:88. [PMID: 28377741 PMCID: PMC5359221 DOI: 10.3389/fneur.2017.00088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 02/24/2017] [Indexed: 11/29/2022] Open
Abstract
l-3,4-Dihydroxyphenylalanine (l-DOPA) remains the primary pharmacological agent for the symptomatic treatment of Parkinson’s disease (PD). However, the development of l-DOPA-induced dyskinesia (LID) limits the long-term use of l-DOPA for PD patients. Some data have reported that adenosine A2A receptor (A2AR) antagonists prevented LID in animal model of PD. However, the mechanism in which adenosine A2AR blockade alleviates the symptoms of LID has not been fully clarified. Here, we determined to knock out (KO) the gene of A2AR and explored the possible underlying mechanisms implicated in development of LID in a mouse model of PD. A2AR gene KO mice were unilaterally injected into the striatum with 6-hydroxydopamine (6-OHDA) in order to damage dopamine neurons on one side of the brain. 6-OHDA-lesioned mice were then injected once daily for 21 days with l-DOPA. Abnormal involuntary movements (AIMs) were evaluated on days 3, 8, 13, and 18 after l-DOPA administration, and real-time polymerase chain reaction and immunohistochemistry for glutamic acid decarboxylase (GAD) 65 and GAD67 were performed. We found that A2AR gene KO was effective in reducing AIM scores and accompanied with decrease of striatal GAD67, rather than GAD65. These results demonstrated that the possible mechanism involved in alleviation of AIM symptoms by A2AR gene KO might be through reducing the expression of striatal GAD67.
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Affiliation(s)
- Su-Bing Yin
- Department of Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University , Wenzhou , China
| | - Xiao-Guang Zhang
- Department of Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University , Wenzhou , China
| | - Shuang Chen
- Department of Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University , Wenzhou , China
| | - Wen-Ting Yang
- Department of Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University , Wenzhou , China
| | - Xia-Wei Zheng
- Department of Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University , Wenzhou , China
| | - Guo-Qing Zheng
- Department of Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University , Wenzhou , China
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Wu Q, Tun HM, Law YS, Khafipour E, Shah NP. Common Distribution of gad Operon in Lactobacillus brevis and its GadA Contributes to Efficient GABA Synthesis toward Cytosolic Near-Neutral pH. Front Microbiol 2017; 8:206. [PMID: 28261168 PMCID: PMC5306213 DOI: 10.3389/fmicb.2017.00206] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 01/30/2017] [Indexed: 12/23/2022] Open
Abstract
Many strains of lactic acid bacteria (LAB) and bifidobacteria have exhibited strain-specific capacity to produce γ-aminobutyric acid (GABA) via their glutamic acid decarboxylase (GAD) system, which is one of amino acid-dependent acid resistance (AR) systems in bacteria. However, the linkage between bacterial AR and GABA production capacity has not been well established. Meanwhile, limited evidence has been provided to the global diversity of GABA-producing LAB and bifidobacteria, and their mechanisms of efficient GABA synthesis. In this study, genomic survey identified common distribution of gad operon-encoded GAD system in Lactobacillus brevis for its GABA production among varying species of LAB and bifidobacteria. Importantly, among four commonly distributed amino acid-dependent AR systems in Lb. brevis, its GAD system was a major contributor to maintain cytosolic pH homeostasis by consuming protons via GABA synthesis. This highlights that Lb. brevis applies GAD system as the main strategy against extracellular and intracellular acidification demonstrating its high capacity of GABA production. In addition, the abundant GadA retained its activity toward near-neutral pH (pH 5.5–6.5) of cytosolic acidity thus contributing to efficient GABA synthesis in Lb. brevis. This is the first global report illustrating species-specific characteristic and mechanism of efficient GABA synthesis in Lb. brevis.
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Affiliation(s)
- Qinglong Wu
- School of Biological Sciences, The University of Hong Kong Hong Kong, Hong Kong
| | - Hein Min Tun
- Department of Animal Science, University of Manitoba Winnipeg, MB, Canada
| | - Yee-Song Law
- School of Biological Sciences, The University of Hong Kong Hong Kong, Hong Kong
| | - Ehsan Khafipour
- Department of Animal Science, University of ManitobaWinnipeg, MB, Canada; Department of Medical Microbiology, University of ManitobaWinnipeg, MB, Canada
| | - Nagendra P Shah
- School of Biological Sciences, The University of Hong KongHong Kong, Hong Kong; Victoria UniversityMelbourne, VIC, Australia
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Abstract
We report a case of a 72-year-old woman who initially presented with symptoms of bulbar myasthenia and was positive for anti-acetylcholine receptor antibodies. She subsequently developed painful muscle spasms, myoclonus, and stiffness. Thymoma was detected, and both anti-glycine receptor and anti-glutamic acid decarboxylase antibodies were found. She was diagnosed with thymoma-associated progressive encephalomyelitis with rigidity and myoclonus (PERM). She experienced marked improvement after thymectomy followed by plasma exchange and intravenous immunoglobulin and prednisolone. This case suggests that thymectomy followed by sufficient immunosuppression may be useful in the treatment of thymoma-associated PERM. Myasthenia gravis may develop in thymoma-associated PERM patients.
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Affiliation(s)
- Satoshi Morise
- Department of Neurology, Kansai Medical University, Japan
| | | | | | - Kousuke Miyake
- Department of Neurology, Kansai Medical University, Japan
| | | | - Satoshi Kaneko
- Department of Neurology, Kansai Medical University, Japan
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Sunagawa M, Shimizu-Okabe C, Kim J, Kobayashi S, Kosaka Y, Yanagawa Y, Matsushita M, Okabe A, Takayama C. Distinct development of the glycinergic terminals in the ventral and dorsal horns of the mouse cervical spinal cord. Neuroscience 2017; 343:459-71. [PMID: 28039040 DOI: 10.1016/j.neuroscience.2016.12.032] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Revised: 12/16/2016] [Accepted: 12/19/2016] [Indexed: 02/01/2023]
Abstract
In the spinal cord, glycine and γ-amino butyric acid (GABA) are inhibitory neurotransmitters. However, the ontogeny of the glycinergic network remains unclear. To address this point, we examined the developmental formation of glycinergic terminals by immunohistochemistry for glycine transporter 2 (GlyT2), a marker of glycinergic terminals, in developing mouse cervical spinal cord. Furthermore, the developmental localization of GlyT2 was compared with that of glutamic acid decarboxylase (GAD), a marker of GABAergic terminals, and vesicular GABA transporter (VGAT), a marker of inhibitory terminals, by single and double immunolabeling. GlyT2-positive dots (glycinergic terminals) were first detected in the marginal zone on embryonic day 14 (E14). In the ventral horn, they were detected at E16 and increased in observed density during postnatal development. Until postnatal day 7 (P7), GAD-positive dots (GABAergic terminals) were dominant and GlyT2 immunolabeling was localized at GAD-positive dots. During the second postnatal week, GABAergic terminals markedly decreased and glycinergic terminals became dominant. In the dorsal horn, glycinergic terminals were detected at P0 in lamina IV and P7 in lamina III and developmentally increased. GlyT2 was also localized at GAD-positive dots, and colocalizing dots were dominant at P21. VGAT-positive dots (inhibitory terminals) continued to increase until P21. These results suggest that GABAergic terminals first appear during embryonic development and may often change to colocalizing terminals throughout the gray matter during development. The colocalizing terminals may remain in the dorsal horn, whereas in the ventral horn, colocalizing terminals may give rise to glycinergic terminals.
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Veerasakul S, Watiktinkorn P, Thanoi S, Reynolds GP, Nudmamud-Thanoi S. Association of polymorphisms in GAD1 and GAD2 genes with methamphetamine dependence. Pharmacogenomics 2016; 18:17-22. [PMID: 27967329 DOI: 10.2217/pgs-2016-0101] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
AIM Association between polymorphisms in GAD genes and methamphetamine (METH) dependence was investigated in the Thai population. MATERIALS & METHODS Genotypes of rs769404 and rs701492 in GAD1 and rs2236418 in GAD2 polymorphisms were determined in 100 METH-dependent male subjects and 102 matched controls. RESULTS The genotype and allele frequencies of rs2236418 (GAD2) were associated with METH dependence and METH with psychosis, in which the G allele was related to increased risk. The presence of the rs769404-rs701492 (GAD1) C-C haplotype was associated with METH psychosis. CONCLUSION This study indicates that genetic variability in GAD1 and GAD2 contributes to risk of METH dependence and METH psychosis in the Thai population and indicates the role of the GABAergic system in these disorders.
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Affiliation(s)
- Siriluk Veerasakul
- Department of Anatomy, Faculty of Medical Science, Naresuan University, Phitsanulok, 65000, Thailand.,Centre of Excellence in Medical Biotechnology, Faculty of Medical Science, Naresuan University, Phitsanulok, 65000, Thailand
| | | | - Samur Thanoi
- Department of Anatomy, Faculty of Medical Science, Naresuan University, Phitsanulok, 65000, Thailand.,Centre of Excellence in Medical Biotechnology, Faculty of Medical Science, Naresuan University, Phitsanulok, 65000, Thailand
| | - Gavin P Reynolds
- Centre of Excellence in Medical Biotechnology, Faculty of Medical Science, Naresuan University, Phitsanulok, 65000, Thailand.,Biomedical Research Centre, Sheffield Hallam University, Sheffield, S1 1WB, UK
| | - Sutisa Nudmamud-Thanoi
- Department of Anatomy, Faculty of Medical Science, Naresuan University, Phitsanulok, 65000, Thailand.,Centre of Excellence in Medical Biotechnology, Faculty of Medical Science, Naresuan University, Phitsanulok, 65000, Thailand
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Fujimoto H, Konno K, Watanabe M, Jinno S. Late postnatal shifts of parvalbumin and nitric oxide synthase expression within the GABAergic and glutamatergic phenotypes of inferior colliculus neurons. J Comp Neurol 2016; 525:868-884. [PMID: 27560447 DOI: 10.1002/cne.24104] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 08/22/2016] [Accepted: 08/22/2016] [Indexed: 01/24/2023]
Abstract
The inferior colliculus (IC) is partitioned into three subdivisions: the dorsal and lateral cortices (DC and LC) and the central nucleus (ICC), and serves as an integration center of auditory information. Recent studies indicate that a certain population of IC neurons may represent the non-GABAergic phenotype, while they express well-established cortical/hippocampal GABAergic neuron markers. In this study we used the optical disector to investigate the phenotype of IC neurons expressing parvalbumin (PV) and/or nitric oxide synthase (NOS) in C57BL/6J mice during the late postnatal period. Four major types of IC neurons were defined by the presence (+) or absence (-) of PV, NOS, and glutamic acid decarboxylase 67 (GAD67): PV+ /NOS- /GAD67+ , PV+ /NOS+ /GAD67+ , PV+ /NOS- /GAD67- , and PV- /NOS+ /GAD67- . Fluorescent in situ hybridization for vesicular glutamate transporter 2 mRNA indicated that almost all GAD67- IC neurons represented the glutamatergic phenotype. The numerical densities (NDs) of total GAD67+ IC neurons remained unchanged in all subdivisions. The NDs of PV+ /NOS- /GAD67+ neurons and PV- /NOS+ /GAD67- neurons were reduced with age in the ICC, while they remained unchanged in the DC and LC. By contrast, the NDs of PV+ /NOS+ /GAD67+ neurons and PV+ /NOS- /GAD67- neurons were increased with age in the ICC, although there were no changes in the DC and LC. The cell body size of GAD67+ IC neurons did not vary according to the expression of PV with or without NOS. The present findings indicate that the expression of PV and NOS may shift with age within the GABAergic and glutamatergic phenotypes of IC neurons during the late postnatal period. J. Comp. Neurol. 525:868-884, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Hisataka Fujimoto
- Department of Anatomy and Neuroscience, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kotaro Konno
- Department of Anatomy, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Masahiko Watanabe
- Department of Anatomy, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Shozo Jinno
- Department of Anatomy and Neuroscience, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Unnikrishnan R, Shanthi Rani CS, Anjana RM, Uthra SC, Vidya J, Sankari GU, Venkatesan U, Rani SJ, Mohan V. Postpartum development of type 1 diabetes in Asian Indian women with gestational diabetes. Indian J Endocrinol Metab 2016; 20:702-706. [PMID: 27730084 PMCID: PMC5040054 DOI: 10.4103/2230-8210.190562] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
AIM To study the postpartum conversion of gestational diabetes mellitus (GDM) to different types of diabetes among Asian Indian women. MATERIALS AND METHODS Using data from electronic medical records, 418 women with GDM seen at a tertiary diabetes care center for diabetes in Chennai in South India between 1991 and 2014 were evaluated for development of diabetes postpartum. RESULTS Of the 418 GDM women followed up postpartum, 388 progressed to diabetes. Of these 359 (92.5%) developed type 2 diabetes (T2DM) and 29 women (7.5%) developed type 1 diabetes (T1DM). The median time to development of T1DM was 2 years (interquartile range 2 [IQR]) while for T2DM it was 5 years (IQR 6). Women who developed T1DM had significantly lower mean body mass index (BMI) (20.4 ± 2.8 vs. 27.5 ± 4.4 kg/m2, P = 0.001), and higher fasting plasma glucose (222 ± 105 vs. 165 ± 62 mg/dl P = 0.008) and glycated hemoglobin levels (10.2 ± 2.7 vs. 8.5 ± 2.1% P < 0.001) compared to those who developed T2DM. Glutamic acid decarboxylase (GAD) autoantibodies were present in 24/29 (82.7%) of women who developed T1DM. CONCLUSION A small but significant proportion of women with GDM progress to T1DM postpartum. Measurement of GAD antibodies in leaner women with more severe diabetes could help to identify women who are likely to develop T1DM and thus prevent their presentation with acute hyperglycemic emergencies after delivery.
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Affiliation(s)
- Ranjit Unnikrishnan
- Madras Diabetes Research Foundation and Dr. Mohan's Diabetes Specialities Centre, Chennai, Tamil Nadu, India
| | | | - Ranjit Mohan Anjana
- Madras Diabetes Research Foundation and Dr. Mohan's Diabetes Specialities Centre, Chennai, Tamil Nadu, India
| | - Subash Chandrabose Uthra
- Madras Diabetes Research Foundation and Dr. Mohan's Diabetes Specialities Centre, Chennai, Tamil Nadu, India
| | - Jaydeep Vidya
- Madras Diabetes Research Foundation and Dr. Mohan's Diabetes Specialities Centre, Chennai, Tamil Nadu, India
| | - Ganesan Uma Sankari
- Madras Diabetes Research Foundation and Dr. Mohan's Diabetes Specialities Centre, Chennai, Tamil Nadu, India
| | - Ulagamathesan Venkatesan
- Madras Diabetes Research Foundation and Dr. Mohan's Diabetes Specialities Centre, Chennai, Tamil Nadu, India
| | - Saravanan Jeba Rani
- Madras Diabetes Research Foundation and Dr. Mohan's Diabetes Specialities Centre, Chennai, Tamil Nadu, India
| | - Viswanathan Mohan
- Madras Diabetes Research Foundation and Dr. Mohan's Diabetes Specialities Centre, Chennai, Tamil Nadu, India
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Takayanagi-Kiya S, Jin Y. Altered Function of the DnaJ Family Cochaperone DNJ-17 Modulates Locomotor Circuit Activity in a Caenorhabditis elegans Seizure Model. G3 (Bethesda) 2016; 6:2165-71. [PMID: 27185401 DOI: 10.1534/g3.116.028928] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The highly conserved cochaperone DnaJ/Hsp40 family proteins are known to interact with molecular chaperone Hsp70, and can regulate many cellular processes including protein folding, translocation, and degradation. In studies of Caenorhabditis elegans locomotion mutants, we identified a gain-of-function (gf) mutation in dnj-17 closely linked to the widely used e156 null allele of C. elegans GAD (glutamic acid decarboxylase) unc-25. dnj-17 encodes a DnaJ protein orthologous to human DNAJA5. In C. elegansDNJ-17 is a cytosolic protein and is broadly expressed in many tissues. dnj-17(gf) causes a single amino acid substitution in a conserved domain, and behaves as a hypermorphic mutation. The effect of this dnj-17(gf) is most prominent in mutants lacking GABA synaptic transmission. In a seizure model caused by a mutation in the ionotropic acetylcholine receptor acr-2(gf), dnj-17(gf) exacerbates the convulsion phenotype in conjunction with absence of GABA. Null mutants of dnj-17 show mild resistance to aldicarb, while dnj-17(gf) is hypersensitive. These results highlight the importance of DnaJ proteins in regulation of C. elegans locomotor circuit, and provide insights into the in vivo roles of DnaJ proteins in humans.
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Gregg B, Connor CG, Cheng P, Ruedy KJ, Beck RW, Kollman C, Schatz D, Cengiz E, Tamborlane WV, Klingensmith GJ, Lee JM. C-peptide levels in pediatric type 2 diabetes in the Pediatric Diabetes Consortium T2D Clinic Registry. Pediatr Diabetes 2016; 17:274-80. [PMID: 25940861 DOI: 10.1111/pedi.12280] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 03/25/2015] [Accepted: 04/07/2015] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVE To describe C-peptide levels in a large cohort of children with type 2 diabetes T2D and examine associations with demographic and clinical factors. METHODS The Pediatric Diabetes Consortium (PDC) T2D Registry has collected clinical and biologic data from youth with T2D cared for at eight US Pediatric Diabetes Centers. In this study, we assessed C-peptide levels in 331 youth with T2D (mean age, 16.1 ± 2.5 yr; median T2D duration, 2.4 yr). RESULTS Median (interquartile range) for 90 fasted C-peptide measurements was 3.5 ng/mL (2.3-4.8 ng/mL) [1.2 nmol/L (0.8-1.6 nmol/L)] and for 241 random non-fasted C-peptide measurements were 4.2 ng/mL (2.6-7.0 ng/mL) [1.4 nmol/L (0.9-2.3 nmol/L)]. C-peptide levels were lower with insulin therapy (p < 0.001), lower body mass index (p < 0.001), hemoglobin A1c (HbA1c) ≥9% (p < 0.001), and T2D duration ≥ 6 yr (p = 0.04). Among those with duration ≥6 yr being treated with insulin and with a HbA1c level ≥9.0% (75 mmol/L), 75% of the fasted and 80% of the non-fasted C-peptide values were above 0.2 nmol/L. CONCLUSIONS In youth with T2D, a decline in C-peptide is associated with deterioration of metabolic control and the need for insulin treatment. C-peptide levels decrease over time. However, even insulin-treated patients with 6 or more years of T2D and elevated HbA1c levels retain substantial endogenous insulin secretion.
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Affiliation(s)
- Brigid Gregg
- Department of Pediatric Endocrinology, Mott Children's Hospital, University of Michigan, Ann Arbor, MI, USA
| | | | | | | | - Roy W Beck
- Jaeb Center for Health Research, Tampa, FL, USA
| | | | - Desmond Schatz
- Pediatric Endocrinology, University of Florida, Gainesville, FL, USA
| | - Eda Cengiz
- Pediatric Endocrinology, Yale University, New Haven, CT, USA
| | | | - Georgeanna J Klingensmith
- Department of Pediatrics, Barbara Davis Center for Childhood Diabetes, University of Colorado, Aurora, CO, USA
| | - Joyce M Lee
- Department of Pediatric Endocrinology, Mott Children's Hospital, University of Michigan, Ann Arbor, MI, USA.,Child Health Evaluation and Research Unit, University of Michigan, Ann Arbor, MI, USA
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Kami K, Taguchi Ms S, Tajima F, Senba E. Improvements in impaired GABA and GAD65/67 production in the spinal dorsal horn contribute to exercise-induced hypoalgesia in a mouse model of neuropathic pain. Mol Pain 2016; 12:12/0/1744806916629059. [PMID: 27030712 PMCID: PMC4956002 DOI: 10.1177/1744806916629059] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 12/04/2015] [Indexed: 11/16/2022] Open
Abstract
Background Physical exercise effectively attenuates neuropathic pain, and multiple events including the inhibition of activated glial cells in the spinal dorsal horn, activation of the descending pain inhibitory system, and reductions in pro-inflammatory cytokines in injured peripheral nerves may contribute to exercise-induced hypoalgesia. Since fewer GABAergic hypoalgesic interneurons exist in the dorsal horn in neuropathic pain model animals, the recovery of impaired GABAergic inhibition in the dorsal horn may improve pain behavior. We herein determined whether the production of gamma-aminobutyric acid (GABA) and glutamic acid decarboxylase (GAD) in the dorsal horn is restored by treadmill running and contributes to exercise-induced hypoalgesia in neuropathic pain model mice. C57BL/6 J mice underwent partial sciatic nerve ligation (PSL). PSL-Runner mice ran on a treadmill at 7 m/min for 60 min/day, 5 days/week, from two days after PSL. Results Mechanical allodynia and heat hyperalgesia developed in PSL-Sedentary mice but were significantly attenuated in PSL-Runner mice. PSL markedly decreased GABA and GAD65/67 levels in neuropils in the ipsilateral dorsal horn, while treadmill running inhibited these reductions. GABA+ neuronal nuclei+ interneuron numbers in the ipsilateral dorsal horn were significantly decreased in PSL-Sedentary mice but not in PSL-Runner mice. Pain behavior thresholds positively correlated with GABA and GAD65/67 levels and GABAergic interneuron numbers in the ipsilateral dorsal horns of PSL-Sedentary and -Runner mice. Conclusions Treadmill running prevented PSL-induced reductions in GAD65/67 production, and, thus, GABA levels may be retained in interneurons and neuropils in the superficial dorsal horn. Therefore, improvements in impaired GABAergic inhibition may be involved in exercise-induced hypoalgesia.
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Affiliation(s)
- Katsuya Kami
- Department of Rehabilitation Medicine, Wakayama Medical University, Wakayama City, Wakayama, Japan
| | - Satoru Taguchi Ms
- Department of Rehabilitation Medicine, Wakayama Medical University, Wakayama City, Wakayama, Japan
| | - Fumihiro Tajima
- Department of Rehabilitation Medicine, Wakayama Medical University, Wakayama City, Wakayama, Japan
| | - Emiko Senba
- Department of Rehabilitation Medicine, Wakayama Medical University, Wakayama City, Wakayama, Japan Department of Physical Therapy, Osaka Yukioka College of Health Science, Ibaraki City, Osaka, Japan
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Bayram AK, Kardas F, Demirci EO, Gokahmetoglu S, Ozmen S, Canpolat M, Oztop DB, Kumandas S, Gumus H, Per H. Lack of serum antineuronal antibodies in children with autism. BRATISL MED J 2016; 117:77-9. [PMID: 26830036 DOI: 10.4149/bll_2016_015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE Autism spectrum disorders (ASDs) are a severe group of neurodevelopmental disorders that are characterized by impairment in social communication, and imagination and social interaction. The aetiology of autism is complex, but some studies suggest autoimmunity to the central nervous system in the pathogenesis. The aim of this study is to investigate the positivity of antineuronal antibodies including anti-glutamic acid decarboxylase antibodies (anti-GAD), anti-glutamate receptor (anti-GluR) antibodies and seven types of anti-ganglioside antibodies, in children with autism. METHODS We conducted the study over a period of one year from May 2012 to December 2013. Human anti-GAD in serum were investigated with ELISA; human autoantibodies against the N-methyl-D-aspartate subtype of GluR were investigated with indirect immunofluorescence test; class IgG antibodies against the seven gangliosides were investigated with immunoblot assay. RESULTS Serum antineuronal antibodies were measured in 42 children (24 male, 18 female) with autism in comparison to 21 (13 male, 8 female) healthy-matched children aged between 2-12 years. There was no seropositivity of antineuronal antibodies in either of the groups. CONCLUSION There is no evidence to support an association between autism and antibodies positivity of anti-GAD, anti-GluR and anti-gangliosides (Ref. 26).
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