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Rahmani Z, Banisadr A, Ghodsinezhad V, Dibaj M, Aryani O. P. Ala278Val mutation might cause a pathogenic defect in HEXB folding leading to the Sandhoff disease. Metab Brain Dis 2022; 37:2669-2675. [PMID: 36190588 DOI: 10.1007/s11011-021-00669-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 01/07/2021] [Indexed: 11/30/2022]
Abstract
Sandhoff disease is a rare neurodegenerative and autosomal recessive disorder, which is characterized by a defect in ganglioside metabolism. Also, it is caused by mutations in the HEXB gene for the β-subunit isoform 1 of β-N-acetyl hexosaminidase. In the present study, an Iranian 14- month -old girl with 8- month history of unsteady walking and involuntary movements was described. In this regard, biochemical testing showed some defects in the normal activity of beta-hexosaminidase protein. Following sequencing of HEXB gene, a homozygous c.833C > T mutation was identified in the patient's genome. After recognition of p.A278V, several different in silico methods were used to assess the mutant protein stability, ranging from mutation prediction methods to ligand docking. The p.A278V mutation might be disruptive because of changing the three-dimensional folding at the end of the 5th alpha helix. According to the medical prognosis, in silico and structural analyses, it was predicted to be disease cause.
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Affiliation(s)
- Zahra Rahmani
- Department of Medical Genetics, Golestan University of Medical Sciences, Gorgan, Iran
| | - Arsham Banisadr
- Department of Medical Biotechnology and Nanotechnology, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Vadieh Ghodsinezhad
- Molecular Medicine Department, Faculty of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran.
| | - Mohsen Dibaj
- Department of Biological Sciences, School of Natural Sciences, University of Tabriz, Tabriz, Iran
| | - Omid Aryani
- Neuroscience Department, Iran University of Medical sciences, Tehran, Iran
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Mansouri‐Movahed F, Akhoundi F, Nikpour P, Garshasbi M, Emadi‐Baygi M. Identification of a novel HEXB Mutation in an Iranian Family with suspected patient to GM2-gangliosidoses. Clin Case Rep 2020; 8:2583-2591. [PMID: 33363784 PMCID: PMC7752470 DOI: 10.1002/ccr3.3103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 06/10/2020] [Accepted: 06/26/2020] [Indexed: 11/19/2022] Open
Abstract
Sandhoff disease is one of the GM2-gangliosidoses which is caused by a mutation in the HEXB preventing the breakdown of GM2-ganglioside. We report a novel HEXB variant in a family with a history of a dead girl with Sandhoff disease which was not found in controls.
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Affiliation(s)
| | - Fatemeh Akhoundi
- Department of GeneticsFaculty of Basic SciencesShahrekord UniversityShahrekordIran
| | - Parvaneh Nikpour
- Department of Genetics and Molecular BiologyFaculty of MedicineIsfahan University of Medical SciencesIsfahanIran
- Child Growth and Development Research CenterResearch Institute for Primordial Prevention of Non‐Communicable DiseaseIsfahan University of Medical SciencesIsfahanIran
| | - Masoud Garshasbi
- Department of Medical GeneticsFaculty of Medical SciencesTarbiat Modares UniversityTehranIran
| | - Modjtaba Emadi‐Baygi
- Department of GeneticsFaculty of Basic SciencesShahrekord UniversityShahrekordIran
- Research Institute of BiotechnologyShahrekord UniversityShahrekordIran
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Liu M, Huang D, Wang H, Zhao L, Wang Q, Chen X. Clinical and Molecular Characteristics of Two Chinese Children with Infantile Sandhoff Disease and Review of the Literature. J Mol Neurosci 2020; 70:481-487. [PMID: 31919734 DOI: 10.1007/s12031-019-01409-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 09/26/2019] [Indexed: 10/25/2022]
Abstract
Infantile Sandhoff disease is an autosomal recessive inherited disease primarily characterized by cherry red spots in the retina, muscle weakness, seizure, truncal hypotonia, hyperacusis, developmental delay and regression. The pathogenic genetic defects of the HEXB gene, which encodes the β subunit of the hexosaminidase A (ɑβ) and hexosaminidase B (ββ) enzymes, cause deficiency of both the Hex A and Hex B enzymes, resulting in the deposition of GM2 ganglion glycerides in the lysosomes of the central nervous system and somatic cells. The aim of this study was to discover disease-causing variants of the HEXB gene in two Chinese families through the use of exome sequencing. By characterizing three novel variants by molecular genetics, bioinformatics analysis, and three-dimensional structure modeling, we showed that all these novel variants influenced the protein structure. The results broaden the variant spectrum of HEXB in different ethnic groups. Furthermore, not all patients diagnosed with infantile Sandhoff disease had characteristic cranial imaging findings, which can only be used as supplementary information for diagnosis. The results of this study may contribute to clinical management, genetic counseling, and gene-targeted treatments for Sandhoff disease.
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Affiliation(s)
- Min Liu
- Department of Neurology, Children's Hospital of Soochow University, No. 92 Zhongnan Street, Industrial Park, Suzhou, 215003, Jiangsu Province, People's Republic of China
| | - Danping Huang
- Department of Neurology, Children's Hospital of Soochow University, No. 92 Zhongnan Street, Industrial Park, Suzhou, 215003, Jiangsu Province, People's Republic of China
| | - Hongying Wang
- Department of Clinical Laboratory, Children's Hospital of Soochow University, No. 92 Zhongnan Street, Industrial Park, Suzhou, 215003, Jiangsu Province, People's Republic of China
| | - Lei Zhao
- Department of Ophthalmology, Children's Hospital of Soochow University, No. 92 Zhongnan Street, Industrial Park, Suzhou, 215003, Jiangsu Province, People's Republic of China
| | - Qi Wang
- Department of Radiology, Children's Hospital of Soochow University, No. 92 Zhongnan Street, Industrial Park, Suzhou, 215003, Jiangsu Province, People's Republic of China
| | - Xuqin Chen
- Department of Neurology, Children's Hospital of Soochow University, No. 92 Zhongnan Street, Industrial Park, Suzhou, 215003, Jiangsu Province, People's Republic of China.
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Koens LH, Tijssen MAJ, Lange F, Wolffenbuttel BHR, Rufa A, Zee DS, de Koning TJ. Eye movement disorders and neurological symptoms in late-onset inborn errors of metabolism. Mov Disord 2018; 33:1844-1856. [PMID: 30485556 PMCID: PMC6587951 DOI: 10.1002/mds.27484] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 08/03/2018] [Accepted: 08/06/2018] [Indexed: 11/06/2022] Open
Abstract
Inborn errors of metabolism in adults are still largely unexplored. Despite the fact that adult‐onset phenotypes have been known for many years, little attention is given to these disorders in neurological practice. The adult‐onset presentation differs from childhood‐onset phenotypes, often leading to considerable diagnostic delay. The identification of these patients at the earliest stage of disease is important, given that early treatment may prevent or lessen further brain damage. Neurological and psychiatric symptoms occur more frequently in adult forms. Abnormalities of eye movements are also common and can be the presenting sign. Eye movement disorders can be classified as central or peripheral. Central forms are frequently observed in lysosomal storage disorders, whereas peripheral forms are a key feature of mitochondrial disease. Furthermore, oculogyric crisis is an important feature in disorders affecting dopamine syntheses or transport. Ocular motor disorders are often not reported by the patient, and abnormalities can be easily overlooked in a general examination. In adults with unexplained psychiatric and neurological symptoms, a special focus on examination of eye movements can serve as a relatively simple clinical tool to detect a metabolic disorder. Eye movements can be easily quantified and analyzed with video‐oculography, making them a valuable biomarker for following the natural course of disease or the response to therapies. Here, we review, for the first time, eye movement disorders that can occur in inborn errors of metabolism, with a focus on late‐onset forms. We provide a step‐by‐step overview that will help clinicians to examine and interpret eye movement disorders. © 2018 The Authors. Movement Disorders published by Wiley Periodicals, Inc. on behalf of International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Lisette H Koens
- University of Groningen, University Medical Center Groningen, Department of Neurology, Groningen, The Netherlands
| | - Marina A J Tijssen
- University of Groningen, University Medical Center Groningen, Department of Neurology, Groningen, The Netherlands
| | - Fiete Lange
- University of Groningen, University Medical Center Groningen, Department of Clinical Neurophysiology, Groningen, The Netherlands
| | - Bruce H R Wolffenbuttel
- Department of Endocrinology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Alessandra Rufa
- Department of Medicine Surgery and Neurosciences, University of Siena, Eye tracking and Visual Application Lab (EVA Lab)-Neurology and Neurometabolic Unit, Siena, Italy
| | - David S Zee
- Department of Neuroscience, Department of Ophthalmology, The Johns Hopkins University, The Johns Hopkins Hospital, Department of Neurology, Department of Otolaryngology-Head and Neck Surgery, Baltimore, Maryland, USA
| | - Tom J de Koning
- University of Groningen, Division of Metabolic Diseases, University Medical Center Groningen, Groningen, The Netherlands.,University of Groningen, Department of Genetics, University Medical Center Groningen, Groningen, The Netherlands
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Moskot M, Bocheńska K, Jakóbkiewicz-Banecka J, Banecki B, Gabig-Cimińska M. Abnormal Sphingolipid World in Inflammation Specific for Lysosomal Storage Diseases and Skin Disorders. Int J Mol Sci 2018; 19:E247. [PMID: 29342918 PMCID: PMC5796195 DOI: 10.3390/ijms19010247] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 12/20/2017] [Accepted: 01/11/2018] [Indexed: 02/06/2023] Open
Abstract
Research in recent years has shown that sphingolipids are essential signalling molecules for the proper biological and structural functioning of cells. Long-term studies on the metabolism of sphingolipids have provided evidence for their role in the pathogenesis of a number of diseases. As many inflammatory diseases, such as lysosomal storage disorders and some dermatologic diseases, including psoriasis, atopic dermatitis and ichthyoses, are associated with the altered composition and metabolism of sphingolipids, more studies precisely determining the responsibilities of these compounds for disease states are required to develop novel pharmacological treatment opportunities. It is worth emphasizing that knowledge from the study of inflammatory metabolic diseases and especially the possibility of their treatment may lead to insight into related metabolic pathways, including those involved in the formation of the epidermal barrier and providing new approaches towards workable therapies.
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Affiliation(s)
- Marta Moskot
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Laboratory of Molecular Biology, Kadki 24, 80-822 Gdańsk, Poland.
- Department of Medical Biology and Genetics, University of Gdańsk, Wita Stwosza 59, 80-308 Gdańsk, Poland.
| | - Katarzyna Bocheńska
- Department of Medical Biology and Genetics, University of Gdańsk, Wita Stwosza 59, 80-308 Gdańsk, Poland.
| | | | - Bogdan Banecki
- Department of Molecular and Cellular Biology, Intercollegiate Faculty of Biotechnology UG-MUG, Abrahama 58, 80-307 Gdańsk, Poland.
| | - Magdalena Gabig-Cimińska
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Laboratory of Molecular Biology, Kadki 24, 80-822 Gdańsk, Poland.
- Department of Medical Biology and Genetics, University of Gdańsk, Wita Stwosza 59, 80-308 Gdańsk, Poland.
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Gowda VK, Amoghimath R, Srinivasan VM, Bhat M. Sandhoff Disease without Hepatosplenomegaly Due to Hexosaminidase B Gene Mutation. J Pediatr Neurosci 2017; 12:78-79. [PMID: 28553389 PMCID: PMC5437798 DOI: 10.4103/1817-1745.205623] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Sandhoff disease is a neurodegenerative disease caused due to deficiency of hexosaminidase (HEX) A and B. A 1-year-old male child presented with regression of milestones, exaggerated startle response, decreased vision, and seizures from 6 months of age. The child had coarse facies without hepatosplenomegaly. Serum levels of β hexosaminidase total (A + B) were low. Genetic testing for Sandhoff disease revealed a homozygous missense variant on HEXB gene. The case is presented to highlight that the absence of hepatosplenomegaly should not restrain in suspecting Sandhoff disease.
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Affiliation(s)
- Vykuntaraju K Gowda
- Department of Pediatric Neurology, Indira Gandhi Institute of Child Health, Bengaluru, Karnataka, India
| | | | - Varun M Srinivasan
- Department of Pediatric Neurology, Indira Gandhi Institute of Child Health, Bengaluru, Karnataka, India
| | - Maya Bhat
- Department of Neuroradiology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
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Loth MK, Choi J, McGlothan JL, Pletnikov MV, Pomper MG, Guilarte TR. TSPO in a murine model of Sandhoff disease: presymptomatic marker of neurodegeneration and disease pathophysiology. Neurobiol Dis 2015; 85:174-186. [PMID: 26545928 DOI: 10.1016/j.nbd.2015.11.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 11/02/2015] [Indexed: 10/22/2022] Open
Abstract
Translocator protein (18 kDa), formerly known as the peripheral benzodiazepine receptor (PBR), has been extensively used as a biomarker of active brain disease and neuroinflammation. TSPO expression increases dramatically in glial cells, particularly in microglia and astrocytes, as a result of brain injury, and this phenomenon is a component of the hallmark response of the brain to injury. In this study, we used a mouse model of Sandhoff disease (SD) to assess the longitudinal expression of TSPO as a function of disease progression and its relationship to behavioral and neuropathological endpoints. Focusing on the presymptomatic period of the disease, we used ex vivo [(3)H]DPA-713 quantitative autoradiography and in vivo [(125)I]IodoDPA-713 small animal SPECT imaging to show that brain TSPO levels markedly increase prior to physical and behavioral manifestation of disease. We further show that TSPO upregulation coincides with early neuronal GM2 ganglioside aggregation and is associated with ongoing neurodegeneration and activation of both microglia and astrocytes. In brain regions with increased TSPO levels, there is a differential pattern of glial cell activation with astrocytes being activated earlier than microglia during the progression of disease. Immunofluorescent confocal imaging confirmed that TSPO colocalizes with both microglia and astrocyte markers, but the glial source of the TSPO response differs by brain region and age in SD mice. Notably, TSPO colocalization with the astrocyte marker GFAP was greater than with the microglia marker, Mac-1. Taken together, our findings have significant implications for understanding TSPO glial cell biology and for detecting neurodegeneration prior to clinical expression of disease.
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Affiliation(s)
- Meredith K Loth
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Judy Choi
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Jennifer L McGlothan
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Mikhail V Pletnikov
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | - Martin G Pomper
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | - Tomás R Guilarte
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA; Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins Medical Institutions, Baltimore, MD, USA.
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Hu L, Sun Y, Villasana LE, Paylor R, Klann E, Pautler RG. Early changes in the apparent diffusion coefficient (ADC) in a mouse model of Sandhoff's disease occur prior to disease symptoms and behavioral deficits. Magn Reson Med 2010; 62:1175-84. [PMID: 19780154 DOI: 10.1002/mrm.22138] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Sandhoff's disease is a lysosomal storage disease in which the ganglioside GM2 accumulates in lysosomes. It has been reported that MRI cannot detect abnormalities in spin echo images in clinically presymptomatic Sandhoff's disease patients. Because one of the results of GM2 accumulation is cell swelling and lysosomal distension, our goal was to determine if changes in the diffusion of water is perturbed. We utilized the MRI imaging modality diffusion-weighted imaging to measure the apparent diffusion coefficient in a mouse models of Sandhoff's disease, the hexb-/- mouse, and determined if diffusion-weighted imaging could be utilized to detect early changes prior to behavioral or overt disease symptom onset. Here we report for the first time a comprehensive behavioral characterization of the hexb-/- mouse in conjunction with the apparent diffusion coefficient measurement. Our data indicate that the apparent diffusion coefficient decreases in the hexb-/- mouse in many but not all brain regions prior to disease symptoms (<3.5 to 4 months of age) and behavioral deficits (3 months of age). The magnitude of the decrease ranged from 4-18%.
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Affiliation(s)
- Lingyun Hu
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, Texas, USA
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Autti T, Joensuu R, Aberg L. Decreased T2 signal in the thalami may be a sign of lysosomal storage disease. Neuroradiology 2007; 49:571-8. [PMID: 17334752 DOI: 10.1007/s00234-007-0220-6] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2006] [Accepted: 01/23/2007] [Indexed: 10/23/2022]
Abstract
INTRODUCTION Lysosomal disorders are rare and are caused by genetically transmitted lysosomal enzyme deficiencies. A decreased T2 signal in the thalamus has occasionally been reported. AIMS Because the finding of bilateral abnormal signal intensity of the thalamus on T2-weighted images has not been systematically reviewed, and its value as a diagnostic tool critically evaluated, we carried out a systematic review of the literature. METHODS Articles in English with 30 trios of keywords were collected from PubMed. Exclusion criteria were lack of conventional T2-weighted images in the protocol and not being a human study. Finally, 111 articles were included. The thalamus was considered affected only if mentioned in the text or in the figure legends. RESULTS Some 117 patients with various lysosomal diseases and five patients with ceruloplasmin deficiency were reported to have a bilateral decrease in T2 signal intensity. At least one article reported a bilateral decrease in signal intensity of the thalami on T2-weighted images in association with GM1 and GM2 gangliosidosis and with Krabbe's disease, aspartylglucosaminuria, mannosidosis, fucosidosis, and mucolipidosis IV. Furthermore, thalamic alteration was a consistent finding in several types of neuronal ceroid lipofuscinosis (NCL) including CLN1 (infantile NCL), CLN2 (classic late infantile NCL), CLN3 (juvenile NCL), CLN5 (Finnish variant late infantile NCL), and CLN7 (Turkish variant late infantile NCL). CONCLUSION A decrease in T2 signal intensity in the thalami seems to be a sign of lysosomal disease.
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Affiliation(s)
- Taina Autti
- Helsinki Medical Imaging Center, Helsinki University Central Hospital, P.O. Box 340, 00029-HUS, Helsinki, Finland.
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