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Golabi M, Kazemi D, Chadeganipour AS, Fouladseresht H, Sullman MJM, Ghezelbash B, Dastgerdi AY, Eskandari N. The Role of Cobalamin in Multiple Sclerosis: An Update. Inflammation 2024:10.1007/s10753-024-02075-6. [PMID: 38902541 DOI: 10.1007/s10753-024-02075-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 05/29/2024] [Accepted: 06/03/2024] [Indexed: 06/22/2024]
Abstract
Multiple sclerosis (MS) is a neurodegenerative condition that results in axonal and permanent damage to the central nervous system, necessitating healing owing to autoimmune reactions and persistent neuroinflammation. Antioxidant and anti-inflammatory drugs are essential for the management of oxidative stress and neuroinflammation. Additionally, multivitamin supplementation, particularly vitamin B12 (cobalamin), may be beneficial for neuronal protection. Although there is no documented connection between vitamin B12 deficiency and MS, researchers have explored its potential as a metabolic cause. This review highlights the therapeutic benefits of cobalamin (Cbl) in patients with MS.
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Affiliation(s)
- Marjan Golabi
- Applied Physiology Research Center, Cardiovascular Research Institute, Department of Immunology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Danial Kazemi
- Student Research Committee, Isfahan University of Medical Science, Isfahan, Iran
| | | | - Hamed Fouladseresht
- Applied Physiology Research Center, Cardiovascular Research Institute, Department of Immunology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mark J M Sullman
- Department of Life and Health Sciences, University of Nicosia, Nicosia, Cyprus
- Department of Social Sciences, University of Nicosia, Nicosia, Cyprus
| | - Behrooz Ghezelbash
- Laboratory Hematology and Blood Banking, School of Allied Medical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ava Yeganegi Dastgerdi
- Department of Cell and Molecular Biology, Falavarjan Branch, Islamic Azad University of Science, Isfahan, Iran
| | - Nahid Eskandari
- Applied Physiology Research Center, Cardiovascular Research Institute, Department of Immunology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
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Zhang Y, Yang H, Hou S, Xia Y, Wang YQ. Influence of the brain‑gut axis on neuroinflammation in cerebral ischemia‑reperfusion injury (Review). Int J Mol Med 2024; 53:30. [PMID: 38299236 PMCID: PMC10852013 DOI: 10.3892/ijmm.2024.5354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 01/15/2024] [Indexed: 02/02/2024] Open
Abstract
Stroke, a debilitating cerebrovascular ailment, poses significant threats to human life and health. The intricate interplay between the gut‑brain‑microbiota axis (GBMA) and cerebral ischemia‑reperfusion has increasingly become a focal point of scientific exploration, emerging as a pivotal research avenue in stroke pathophysiology. In the present review, the authors delved into the nexus between the GBMA and neuroinflammation observed post‑stroke. The analysis underscored the pivotal roles of histone deacetylase 3 and neutrophil extracellular traps subsequent to stroke incidents. The influence of gut microbial compositions and their metabolites, notably short‑chain fatty acids and trimethylamine N‑oxide, on neuroinflammatory processes, was further elucidated. The involvement of immune cells, especially regulatory T‑cells, and the intricate signaling cascades including cyclic GMP‑AMP synthase/stimulator of interferon genes/Toll‑like receptor, further emphasized the complex regulatory mechanisms of GBMA in cerebral ischemia/reperfusion injury (CI/RI). Collectively, the present review offered a comprehensive perspective on the metabolic, immune and inflammatory modulations orchestrated by GBMA, augmenting the understanding of its role in neuroinflammation following CI/RI.
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Affiliation(s)
- Yifeng Zhang
- Department of Neurology II, The Affiliated Hospital of Weifang Medical University, School of Clinical Medicine, Weifang Medical University, Weifang, Shandong 261041, P.R. China
| | - Hang Yang
- Department of Emergency, The Affiliated Hospital of Weifang Medical University, School of Clinical Medicine, Weifang Medical University, Weifang, Shandong 261041, P.R. China
| | - Shuai Hou
- Department of Emergency, The Affiliated Hospital of Weifang Medical University, School of Clinical Medicine, Weifang Medical University, Weifang, Shandong 261041, P.R. China
| | - Yulei Xia
- Department of Neurology II, The Affiliated Hospital of Weifang Medical University, School of Clinical Medicine, Weifang Medical University, Weifang, Shandong 261041, P.R. China
| | - Yan-Qiang Wang
- Department of Neurology II, The Affiliated Hospital of Weifang Medical University, School of Clinical Medicine, Weifang Medical University, Weifang, Shandong 261041, P.R. China
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3
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Finkelstein JL, Fothergill A, Venkatramanan S, Layden AJ, Williams JL, Crider KS, Qi YP. Vitamin B12 supplementation during pregnancy for maternal and child health outcomes. Cochrane Database Syst Rev 2024; 1:CD013823. [PMID: 38189492 PMCID: PMC10772977 DOI: 10.1002/14651858.cd013823.pub2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
BACKGROUND Vitamin B12 deficiency is a major public health problem worldwide, with the highest burden in elderly people, pregnant women, and young children. Due to its role in DNA synthesis and methylation, folate metabolism, and erythropoiesis, vitamin B12 supplementation during pregnancy may confer longer-term benefits to maternal and child health outcomes. OBJECTIVES To evaluate the benefits and harms of oral vitamin B12 supplementation during pregnancy on maternal and child health outcomes. SEARCH METHODS We searched the Cochrane Pregnancy and Childbirth's Trials Register, ClinicalTrials.gov, the World Health Organization International Clinical Trials Registry Platform (ICTRP) on 2 June 2023, and reference lists of retrieved studies. SELECTION CRITERIA Randomised controlled trials (RCTs), quasi-RCTs, or cluster-RCTs evaluating the effects of oral vitamin B12 supplementation compared to placebo or no vitamin B12 supplementation during pregnancy. DATA COLLECTION AND ANALYSIS We used standard Cochrane methods. Four review authors independently assessed trial eligibility. Two review authors independently extracted data from included studies and conducted checks for accuracy. Three review authors independently assessed the risk of bias of the included studies using the Cochrane RoB 1 tool. We used GRADE to evaluate the certainty of evidence for primary outcomes. MAIN RESULTS The review included five trials with 984 pregnant women. All trials were conducted in low- and middle-income countries, including India, Bangladesh, South Africa, and Croatia. At enrolment, 26% to 51% of pregnant women had vitamin B12 deficiency (less than 150 pmol/L), and the prevalence of anaemia (haemoglobin less than 11.0 g/dL) ranged from 30% to 46%. The dosage of vitamin B12 supplementation varied from 5 μg/day to 250 μg/day, with administration beginning at 8 to 28 weeks' gestation through to delivery or three months' postpartum, and the duration of supplementation ranged from 8 to 16 weeks to 32 to 38 weeks. Three trials, involving 609 pregnant women, contributed data for meta-analyses of the effects of vitamin B12 supplementation compared to placebo or no vitamin B12 supplementation. Maternal anaemia: there may be little to no difference for maternal anaemia by intervention group, but the evidence is very uncertain (70.9% versus 65.0%; risk ratio (RR) 1.08, 95% confidence interval (CI) 0.93 to 1.26; 2 trials, 284 women; very low-certainty evidence). Maternal vitamin B12 status: vitamin B12 supplementation during pregnancy may reduce the risk of maternal vitamin B12 deficiency compared to placebo or no vitamin B12 supplementation, but the evidence is very uncertain (25.9% versus 67.9%; RR 0.38, 95% CI 0.28 to 0.51; 2 trials, 272 women; very low-certainty evidence). Women who received vitamin B12 supplements during pregnancy may have higher total vitamin B12 concentrations compared to placebo or no vitamin B12 supplementation (mean difference (MD) 60.89 pmol/L, 95% CI 40.86 to 80.92; 3 trials, 412 women). However, there was substantial heterogeneity (I2 = 85%). Adverse pregnancy outcomes: the evidence is uncertain about the effect on adverse pregnancy outcomes, including preterm birth (RR 0.97, 95% CI 0.55 to 1.74; 2 trials, 340 women; low-certainty evidence), and low birthweight (RR 1.50, 95% CI 0.93 to 2.43; 2 trials, 344 women; low-certainty evidence). Two trials reported data on spontaneous abortion (or miscarriage); however, the trials did not report quantitative data for meta-analysis and there was no clear definition of spontaneous abortion in the study reports. No trials evaluated the effects of vitamin B12 supplementation during pregnancy on neural tube defects. Infant vitamin B12 status: children born to women who received vitamin B12 supplementation had higher total vitamin B12 concentrations compared to placebo or no vitamin B12 supplementation (MD 71.89 pmol/L, 95% CI 20.23 to 123.54; 2 trials, 144 children). Child cognitive outcomes: three ancillary analyses of one trial reported child cognitive outcomes; however, data were not reported in a format that could be included in quantitative meta-analyses. In one study, maternal vitamin B12 supplementation did not improve neurodevelopment status (e.g. cognitive, language (receptive and expressive), motor (fine and gross), social-emotional, or adaptive (conceptual, social, practical) domains) in children compared to placebo (9 months, Bayley Scales of Infant and Toddler Development Third Edition (BSID-III); 1 trial; low-certainty evidence) or neurophysiological outcomes (72 months, event-related potential measures; 1 trial; low-certainty evidence), though children born to women who received vitamin B12 supplementation had improved expressive language domain compared to placebo (30 months, BSID-III; 1 trial; low-certainty evidence). AUTHORS' CONCLUSIONS Oral vitamin B12 supplementation during pregnancy may reduce the risk of maternal vitamin B12 deficiency and may improve maternal vitamin B12 concentrations during pregnancy or postpartum compared to placebo or no vitamin B12 supplementation, but the evidence is very uncertain. The effects of vitamin B12 supplementation on other primary outcomes assessed in this review were not reported, or were not reported in a format for inclusion in quantitative analyses. Vitamin B12 supplementation during pregnancy may improve maternal and infant vitamin B12 status, but the potential impact on longer-term clinical and functional maternal and child health outcomes has not yet been established.
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Affiliation(s)
| | - Amy Fothergill
- Division of Nutritional Sciences, Cornell University, Ithaca, New York, USA
- National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | | | - Alexander J Layden
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Jennifer L Williams
- National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Krista S Crider
- National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Yan Ping Qi
- National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
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Mathew AR, Di Matteo G, La Rosa P, Barbati SA, Mannina L, Moreno S, Tata AM, Cavallucci V, Fidaleo M. Vitamin B12 Deficiency and the Nervous System: Beyond Metabolic Decompensation-Comparing Biological Models and Gaining New Insights into Molecular and Cellular Mechanisms. Int J Mol Sci 2024; 25:590. [PMID: 38203763 PMCID: PMC10778862 DOI: 10.3390/ijms25010590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 12/16/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024] Open
Abstract
Vitamin B12 (VitB12) is a micronutrient and acts as a cofactor for fundamental biochemical reactions: the synthesis of succinyl-CoA from methylmalonyl-CoA and biotin, and the synthesis of methionine from folic acid and homocysteine. VitB12 deficiency can determine a wide range of diseases, including nervous system impairments. Although clinical evidence shows a direct role of VitB12 in neuronal homeostasis, the molecular mechanisms are yet to be characterized in depth. Earlier investigations focused on exploring the biochemical shifts resulting from a deficiency in the function of VitB12 as a coenzyme, while more recent studies propose a broader mechanism, encompassing changes at the molecular/cellular levels. Here, we explore existing study models employed to investigate the role of VitB12 in the nervous system, including the challenges inherent in replicating deficiency/supplementation in experimental settings. Moreover, we discuss the potential biochemical alterations and ensuing mechanisms that might be modified at the molecular/cellular level (such as epigenetic modifications or changes in lysosomal activity). We also address the role of VitB12 deficiency in initiating processes that contribute to nervous system deterioration, including ROS accumulation, inflammation, and demyelination. Consequently, a complex biological landscape emerges, requiring further investigative efforts to grasp the intricacies involved and identify potential therapeutic targets.
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Affiliation(s)
- Aimee Rachel Mathew
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, 00185 Rome, Italy; (A.R.M.); (A.M.T.)
| | - Giacomo Di Matteo
- Department of Chemistry and Technology of Drugs, Sapienza University of Rome, 00185 Rome, Italy; (G.D.M.); (L.M.)
| | - Piergiorgio La Rosa
- Division of Neuroscience, Department of Psychology, Sapienza University of Rome, 00185 Rome, Italy;
- European Center for Brain Research, IRCCS Fondazione Santa Lucia, 00179 Rome, Italy
| | - Saviana Antonella Barbati
- Departmental Faculty of Medicine and Surgery, UniCamillus-Saint Camillus International University of Health Sciences, 00131 Rome, Italy;
| | - Luisa Mannina
- Department of Chemistry and Technology of Drugs, Sapienza University of Rome, 00185 Rome, Italy; (G.D.M.); (L.M.)
| | - Sandra Moreno
- Department of Science, University Roma Tre, 00146 Rome, Italy;
- Laboratory of Neurodevelopment, Neurogenetics and Neuromolecular Biology, IRCCS Fondazione Santa Lucia, 00179 Rome, Italy
| | - Ada Maria Tata
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, 00185 Rome, Italy; (A.R.M.); (A.M.T.)
- Research Centre of Neurobiology “Daniel Bovet”, Sapienza University of Rome, 00185 Rome, Italy
| | - Virve Cavallucci
- Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica del Sacro Cuore, 00168 Rome, Italy;
- Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy
| | - Marco Fidaleo
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, 00185 Rome, Italy; (A.R.M.); (A.M.T.)
- Research Center for Nanotechnology Applied to Engineering (CNIS), Sapienza University of Rome, 00185 Rome, Italy
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5
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Lin Y, Lee C, Sung J, Chen C. Genetic exploration of roles of acid-sensing ion channel subtypes in neurosensory mechanotransduction including proprioception. Exp Physiol 2024; 109:66-80. [PMID: 37489658 PMCID: PMC10988671 DOI: 10.1113/ep090762] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 07/03/2023] [Indexed: 07/26/2023]
Abstract
Although acid-sensing ion channels (ASICs) are proton-gated ion channels responsible for sensing tissue acidosis, accumulating evidence has shown that ASICs are also involved in neurosensory mechanotransduction. However, in contrast to Piezo ion channels, evidence of ASICs as mechanically gated ion channels has not been found using conventional mechanoclamp approaches. Instead, ASICs are involved in the tether model of mechanotransduction, with the channels gated via tethering elements of extracellular matrix and intracellular cytoskeletons. Methods using substrate deformation-driven neurite stretch and micropipette-guided ultrasound were developed to reveal the roles of ASIC3 and ASIC1a, respectively. Here we summarize the evidence supporting the roles of ASICs in neurosensory mechanotransduction in knockout mouse models of ASIC subtypes and provide insight to further probe their roles in proprioception.
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Affiliation(s)
- Yi‐Chen Lin
- Department of Neurology, Wan Fang HospitalTaipei Medical UniversityTaipeiTaiwan
- The Ph.D. Program for Translational MedicineTaipei Medical University and Academia SinicaNew Taipei CityTaiwan
- Taipei Neuroscience InstituteTaipei Medical UniversityNew Taipei CityTaiwan
- Institute of Biomedical SciencesAcademia SinicaTaipeiTaiwan
| | - Cheng‐Han Lee
- Institute of Biomedical SciencesAcademia SinicaTaipeiTaiwan
- Neuroscience Program of Academia SinicaAcademia SinicaTaipeiTaiwan
| | - Jia‐Ying Sung
- Department of Neurology, Wan Fang HospitalTaipei Medical UniversityTaipeiTaiwan
- Taipei Neuroscience InstituteTaipei Medical UniversityNew Taipei CityTaiwan
- Department of Neurology, School of Medicine, College of MedicineTaipei Medical UniversityTaipeiTaiwan
| | - Chih‐Cheng Chen
- The Ph.D. Program for Translational MedicineTaipei Medical University and Academia SinicaNew Taipei CityTaiwan
- Institute of Biomedical SciencesAcademia SinicaTaipeiTaiwan
- Neuroscience Program of Academia SinicaAcademia SinicaTaipeiTaiwan
- Taiwan Mouse Clinic – National Comprehensive Mouse Phenotyping and Drug Testing CenterAcademia SinicaTaipeiTaiwan
- TMU Neuroscience Research Center, Taipei Medical UniversityNew Taipei CityTaiwan
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Schleicher E, Didangelos T, Kotzakioulafi E, Cegan A, Peter A, Kantartzis K. Clinical Pathobiochemistry of Vitamin B 12 Deficiency: Improving Our Understanding by Exploring Novel Mechanisms with a Focus on Diabetic Neuropathy. Nutrients 2023; 15:nu15112597. [PMID: 37299560 DOI: 10.3390/nu15112597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 05/27/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023] Open
Abstract
Vitamin B12 (B12) is an essential cofactor of two important biochemical pathways, the degradation of methylmalonic acid and the synthesis of methionine from homocysteine. Methionine is an important donor of methyl groups for numerous biochemical reactions, including DNA synthesis and gene regulation. Besides hematological abnormalities (megaloblastic anemia or even pancytopenia), a deficiency in B12 may cause neurological symptoms, including symptoms resembling diabetic neuropathy. Although extensively studied, the underlining molecular mechanism for the development of diabetic peripheral neuropathy (DPN) is still unclear. Most studies have found a contribution of oxidative stress in the development of DPN. Detailed immunohistochemical investigations in sural nerve biopsies obtained from diabetic patients with DPN point to an activation of inflammatory pathways induced via elevated advanced glycation end products (AGE), ultimately resulting in increased oxidative stress. Similar results have been found in patients with B12 deficiency, indicating that the observed neural changes in patients with DPN might be caused by cellular B12 deficiency. Since novel results show that B12 exerts intrinsic antioxidative activity in vitro and in vivo, B12 may act as an intracellular, particularly as an intramitochondrial, antioxidant, independent from its classical, well-known cofactor function. These novel findings may provide a rationale for the use of B12 for the treatment of DPN, even in subclinical early states.
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Affiliation(s)
- Erwin Schleicher
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital of Tübingen, 72076 Tübingen, Germany
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich, German Center for Diabetes Research (DZD), 72076 Tübingen, Germany
- German Center for Diabetes Research (DZD e.V.), 85764 Neuherberg, Germany
| | - Triantafyllos Didangelos
- Diabetes Center, 1st Propaedeutic Department of Internal Medicine, Medical School, "AHEPA" Hospital, Aristotle University of Thessaloniki, 54621 Thessaloniki, Greece
| | - Evangelia Kotzakioulafi
- Diabetes Center, 1st Propaedeutic Department of Internal Medicine, Medical School, "AHEPA" Hospital, Aristotle University of Thessaloniki, 54621 Thessaloniki, Greece
| | - Alexander Cegan
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, 53210 Pardubice, Czech Republic
| | - Andreas Peter
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital of Tübingen, 72076 Tübingen, Germany
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich, German Center for Diabetes Research (DZD), 72076 Tübingen, Germany
- German Center for Diabetes Research (DZD e.V.), 85764 Neuherberg, Germany
| | - Konstantinos Kantartzis
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich, German Center for Diabetes Research (DZD), 72076 Tübingen, Germany
- German Center for Diabetes Research (DZD e.V.), 85764 Neuherberg, Germany
- Department of Internal Medicine IV, Division of Endocrinology, Diabetology and Nephrology, University of Tübingen, 72076 Tübingen, Germany
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7
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Zhou L, Song X, Wang J, Tan Y, Yang Q. Effects of vitamin B 12 deficiency on risk and outcome of ischemic stroke. Clin Biochem 2023; 118:110591. [PMID: 37247800 DOI: 10.1016/j.clinbiochem.2023.110591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 05/23/2023] [Accepted: 05/24/2023] [Indexed: 05/31/2023]
Abstract
Ischemic stroke is the most prevalent form of stroke and has a high incidence in older adults, characterized by high morbidity, mortality, disability, and recurrence rate. Vitamin B12 deficiency is prevalent in the elderly and has been reported to be associated with ischemic stroke. The mechanisms maybe include the disorder of methylation metabolism, accumulation of toxic metabolites, immune dysfunction, affecting gut microbial composition and gut-brain immune homeostasis, and toxic stress responses to the brain. Vitamin B12 deficiency may lead to cerebral artery atherosclerosis, change myelination, influence the metabolism and transmission between nerve tissue, and ultimately causes the occurrence and development of ischemic stroke. This paper reviews the correlation between vitamin B12 deficiency and ischemic stroke, looking forward to improving clinicians' understanding and providing new therapeutic directions for ischemic stroke.
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Affiliation(s)
- Li Zhou
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Xiaosong Song
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China; Department of Neurology, the Ninth People's Hospital of Chongqing, Chongqing, China
| | - Jiani Wang
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Yongjun Tan
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Qin Yang
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China.
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8
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Schmitt WP, Rohatgi S, Matiello M. Case 15-2023: A 33-Year-Old Man with Paresthesia of the Arms and Legs. N Engl J Med 2023; 388:1893-1900. [PMID: 37195945 DOI: 10.1056/nejmcpc2300895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Affiliation(s)
- William P Schmitt
- From the Departments of Medicine (W.P.S.), Radiology (S.R.), and Neurology (M.M.), Massachusetts General Hospital, and the Departments of Medicine (W.P.S.), Radiology (S.R.), and Neurology (M.M.), Harvard Medical School - both in Boston
| | - Saurabh Rohatgi
- From the Departments of Medicine (W.P.S.), Radiology (S.R.), and Neurology (M.M.), Massachusetts General Hospital, and the Departments of Medicine (W.P.S.), Radiology (S.R.), and Neurology (M.M.), Harvard Medical School - both in Boston
| | - Marcelo Matiello
- From the Departments of Medicine (W.P.S.), Radiology (S.R.), and Neurology (M.M.), Massachusetts General Hospital, and the Departments of Medicine (W.P.S.), Radiology (S.R.), and Neurology (M.M.), Harvard Medical School - both in Boston
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9
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Güitrón Leal CE, Palma Molina XE, Williams JL, Venkatramanan S, Finkelstein JL, Kuriyan R, Crider KS. Vitamin B 12
supplementation for growth, development, and cognition in children. Hippokratia 2022. [DOI: 10.1002/14651858.cd015264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
| | | | - Jennifer L Williams
- National Center on Birth Defects and Developmental Disabilities; Centers for Disease Control and Prevention; Atlanta GA USA
| | | | | | - Rebecca Kuriyan
- Division of Nutrition; St John's Research Institute; Bengaluru India
| | - Krista S Crider
- National Center on Birth Defects and Developmental Disabilities; Centers for Disease Control and Prevention; Atlanta GA USA
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10
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Pourié G, Guéant JL, Quadros EV. Behavioral profile of vitamin B 12 deficiency: A reflection of impaired brain development, neuronal stress and altered neuroplasticity. VITAMINS AND HORMONES 2022; 119:377-404. [PMID: 35337627 DOI: 10.1016/bs.vh.2022.02.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Our understanding of brain biology and function is one of the least characterized and therefore, there are no effective treatments for most of neurological disorders. The influence of vitamins, and particularly vitamin B12, in neurodegenerative disease is demonstrated but largely unresolved. Behaviors are often quantified to attest brain dysfunction alone or in parallel with neuro-imaging to identify regions involved. Nevertheless, attention should be paid to extending observations made in animal models to humans, since, first, behavioral tests have to be adjusted in each model to address the initial question and second, because brain analysis should not be conducted for a whole organ but rather to specific sub-structures to better define function. Indeed, cognitive functions such as psychiatric disorders and learning and memory are often cited as the most impacted by a vitamin B12 deficiency. In addition, differential dysfunctions and mechanisms could be defined according sub-populations and ages. Vitamin B12 enters the cell bound to Transcobalamin, through the Transcobalamin Receptor and serves in two cell compartments, the lipid metabolism in the mitochondrion and the one-carbon metabolism involved in methylation reactions. Dysfunctions in these mechanisms can lead to two majors outcomes; axons demyelinisation and upregulation of cellular stress involving mislocalization of RNA binding proteins such as the ELAVL1/HuR or the dysregulation of pro- or anti-oxidant NUDT15, TXNRD1, VPO1 and ROC genes. Finally, it appears that apart from developmental problems that have to be identified and treated as early as possible, other therapeutic approaches for behavioral dysfunctions should investigate cellular methylation, oxidative and endoplasmic reticulum stress and mitochondrial function.
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Affiliation(s)
- Grégory Pourié
- Université de Lorraine, Inserm, UMRS 1256, NGERE-Nutrition, Genetics, and Environmental Risk Exposure, Nancy, France.
| | - Jean-Louis Guéant
- Université de Lorraine, Inserm, UMRS 1256, NGERE-Nutrition, Genetics, and Environmental Risk Exposure, Nancy, France; CHRU-Nancy, National Center of Inborn Errors of Metabolism, Nancy, France
| | - Edward V Quadros
- Department of Medicine, SUNY Downstate Medical Center, Brooklyn, NY, United States
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Pangilinan F, Watkins D, Bernard D, Chen Y, Dong N, Wu Q, Ozel-Abaan H, Kaur M, Caggana M, Morrissey M, Browne ML, Mills JL, Van Ryzin C, Shchelochkov O, Sloan J, Venditti CP, Sarafoglou K, Rosenblatt DS, Kay DM, Brody LC. Probing the functional consequence and clinical relevance of CD320 p.E88del, a variant in the transcobalamin receptor gene. Am J Med Genet A 2022; 188:1124-1141. [PMID: 35107211 DOI: 10.1002/ajmg.a.62627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 11/12/2021] [Accepted: 11/20/2021] [Indexed: 11/06/2022]
Abstract
The biological and clinical significance of the p.E88del variant in the transcobalamin receptor, CD320, is unknown. This allele is annotated in ClinVar as likely benign, pathogenic, and of uncertain significance. To determine functional consequence and clinical relevance of this allele, we employed cell culture and genetic association studies. Fibroblasts from 16 CD320 p.E88del homozygotes exhibited reduced binding and uptake of cobalamin. Complete ascertainment of newborns with transiently elevated C3 (propionylcarnitine) in New York State demonstrated that homozygosity for CD320 p.E88del was over-represented (7/348, p < 6 × 10-5 ). Using population data, we estimate that ~85% of the p.E88del homozygotes born in the same period did not have elevated C3, suggesting that cobalamin metabolism in the majority of these infants with this genotype is unaffected. Clinical follow-up of 4/9 homozygous individuals uncovered neuropsychological findings, mostly in speech and language development. None of these nine individuals exhibited perturbation of cobalamin metabolism beyond the newborn stage even during periods of acute illness. Newborns homozygous for this allele in the absence of other factors are at low risk of requiring clinical intervention, although more studies are required to clarify the natural history of various CD320 variants across patient populations.
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Affiliation(s)
- Faith Pangilinan
- Genetics and Environment Interaction Section, National Human Genome Research Institute, National Institutes of Health, Maryland, USA
| | - David Watkins
- Department of Human Genetics, McGill University and Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - David Bernard
- Genetics and Environment Interaction Section, National Human Genome Research Institute, National Institutes of Health, Maryland, USA
| | - Yue Chen
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, Soochow University, Suzhou, China
| | - Ningzheng Dong
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, Soochow University, Suzhou, China.,MOH Key Laboratory of Thrombosis and Hemostasis, Jiangsu Institute of Hematology, the First Affiliated Hospital of Soochow University, Suzhou, China
| | - Qingyu Wu
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, Soochow University, Suzhou, China
| | - Hatice Ozel-Abaan
- Genetics and Environment Interaction Section, National Human Genome Research Institute, National Institutes of Health, Maryland, USA
| | - Manjit Kaur
- Genetics and Environment Interaction Section, National Human Genome Research Institute, National Institutes of Health, Maryland, USA
| | - Michele Caggana
- Division of Genetics, Wadsworth Center, New York State Department of Health, Albany, New York, USA
| | - Mark Morrissey
- Division of Genetics, Wadsworth Center, New York State Department of Health, Albany, New York, USA
| | - Marilyn L Browne
- Birth Defects Registry, New York State Department of Health, Albany, New York and University at Albany School of Public Health, Rensselaer, New York, USA
| | - James L Mills
- Epidemiology Branch, Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, USA
| | - Carol Van Ryzin
- Organic Acid Research Section, National Human Genome Research Institute, National Institutes of Health, Maryland, USA
| | - Oleg Shchelochkov
- Organic Acid Research Section, National Human Genome Research Institute, National Institutes of Health, Maryland, USA
| | - Jennifer Sloan
- Organic Acid Research Section, National Human Genome Research Institute, National Institutes of Health, Maryland, USA
| | - Charles P Venditti
- Organic Acid Research Section, National Human Genome Research Institute, National Institutes of Health, Maryland, USA
| | - Kyriakie Sarafoglou
- Department of Pediatrics, University of Minnesota Medical School, Minneapolis, Minnesota, USA
| | - David S Rosenblatt
- Department of Human Genetics, McGill University and Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada.,Division of Medical Biochemistry, Department of Specialized Medicine, McGill University Health Centre, Montreal, Quebec, Canada.,Division of Medical Genetics, Department of Specialized Medicine, McGill University Health Centre, Montreal, Quebec, Canada
| | - Denise M Kay
- Division of Genetics, Wadsworth Center, New York State Department of Health, Albany, New York, USA
| | - Lawrence C Brody
- Genetics and Environment Interaction Section, National Human Genome Research Institute, National Institutes of Health, Maryland, USA
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12
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Chen Y, Gu X, Zhang Y, Zhang X, Zhang C, Liu M, Sun S, Dong N, Wu Q. CD320 expression and apical membrane targeting in renal and intestinal epithelial cells. Int J Biol Macromol 2022; 201:85-92. [PMID: 34998874 DOI: 10.1016/j.ijbiomac.2021.12.158] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 12/21/2021] [Accepted: 12/24/2021] [Indexed: 02/06/2023]
Abstract
Vitamin B12 is an essential nutrient acquired via dietary intake. Receptor-mediated endocytosis is a key mechanism in vitamin B12 absorption, cellular uptake, and reabsorption. CD320 is a type I transmembrane protein responsible for cellular uptake of vitamin B12 in peripheral tissues. In this study, we examined segmental distribution and cellular expression of CD320 in mouse kidneys and intestines. We show that CD320 is expressed on the luminal surface in the small intestine and in proximal tubules in the kidney, suggesting that, in addition to its role in vitamin B12 uptake in peripheral tissues, CD320 may participate in vitamin B12 absorption in the small intestine and reabsorption in the kidney. Moreover, we show that an amino acid motif, DSSDE, in the second low-density lipoprotein receptor class A domain of CD320 is a key apical membrane targeting signal in both renal and intestinal epithelial cells. Mutations or deletion of this motif abolish the specific apical membrane expression of CD320 in polarized Madin-Darby canine kidney cells and human colon cancer-derived Caco-2 cells. In short-hairpin RNA-based gene knockdown experiments, we show that the apical membrane targeting of CD320 is mediated by a Rab11a-dependent mechanism. These results extend our knowledge regarding the cell biology of CD320 and its role in vitamin B12 metabolism.
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Affiliation(s)
- Yue Chen
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, Medical School, Soochow University, Suzhou 215123, China
| | - Xiabing Gu
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, Medical School, Soochow University, Suzhou 215123, China; MOH Key Laboratory of Thrombosis and Hemostasis, Jiangsu Institute of Hematology, the First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Yikai Zhang
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, Medical School, Soochow University, Suzhou 215123, China; MOH Key Laboratory of Thrombosis and Hemostasis, Jiangsu Institute of Hematology, the First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Xianrui Zhang
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, Medical School, Soochow University, Suzhou 215123, China; MOH Key Laboratory of Thrombosis and Hemostasis, Jiangsu Institute of Hematology, the First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Ce Zhang
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, Medical School, Soochow University, Suzhou 215123, China
| | - Meng Liu
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, Medical School, Soochow University, Suzhou 215123, China
| | - Shijin Sun
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, Medical School, Soochow University, Suzhou 215123, China; MOH Key Laboratory of Thrombosis and Hemostasis, Jiangsu Institute of Hematology, the First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Ningzheng Dong
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, Medical School, Soochow University, Suzhou 215123, China; MOH Key Laboratory of Thrombosis and Hemostasis, Jiangsu Institute of Hematology, the First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Qingyu Wu
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, Medical School, Soochow University, Suzhou 215123, China.
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Koslová A, Trefil P, Mucksová J, Krchlíková V, Plachý J, Krijt J, Reinišová M, Kučerová D, Geryk J, Kalina J, Šenigl F, Elleder D, Kožich V, Hejnar J. Knock-Out of Retrovirus Receptor Gene Tva in the Chicken Confers Resistance to Avian Leukosis Virus Subgroups A and K and Affects Cobalamin (Vitamin B 12)-Dependent Level of Methylmalonic Acid. Viruses 2021; 13:v13122504. [PMID: 34960774 PMCID: PMC8708277 DOI: 10.3390/v13122504] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/06/2021] [Accepted: 12/08/2021] [Indexed: 01/18/2023] Open
Abstract
The chicken Tva cell surface protein, a member of the low-density lipoprotein receptor family, has been identified as an entry receptor for avian leukosis virus of classic subgroup A and newly emerging subgroup K. Because both viruses represent an important concern for the poultry industry, we introduced a frame-shifting deletion into the chicken tva locus with the aim of knocking-out Tva expression and creating a virus-resistant chicken line. The tva knock-out was prepared by CRISPR/Cas9 gene editing in chicken primordial germ cells and orthotopic transplantation of edited cells into the testes of sterilized recipient roosters. The resulting tva −/− chickens tested fully resistant to avian leukosis virus subgroups A and K, both in in vitro and in vivo assays, in contrast to their susceptible tva +/+ and tva +/− siblings. We also found a specific disorder of the cobalamin/vitamin B12 metabolism in the tva knock-out chickens, which is in accordance with the recently recognized physiological function of Tva as a receptor for cobalamin in complex with transcobalamin transporter. Last but not least, we bring a new example of the de novo resistance created by CRISPR/Cas9 editing of pathogen dependence genes in farm animals and, furthermore, a new example of gene editing in chicken.
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Affiliation(s)
- Anna Koslová
- Institute of Molecular Genetics, Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic; (A.K.); (V.K.); (J.P.); (M.R.); (D.K.); (J.G.); (F.Š.); (D.E.)
| | - Pavel Trefil
- BIOPHARM, Research Institute of Biopharmacy and Veterinary Drugs, Pohoří-Chotouň 90, 254 49 Jílové u Prahy, Czech Republic; (P.T.); (J.M.); (J.K.)
| | - Jitka Mucksová
- BIOPHARM, Research Institute of Biopharmacy and Veterinary Drugs, Pohoří-Chotouň 90, 254 49 Jílové u Prahy, Czech Republic; (P.T.); (J.M.); (J.K.)
| | - Veronika Krchlíková
- Institute of Molecular Genetics, Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic; (A.K.); (V.K.); (J.P.); (M.R.); (D.K.); (J.G.); (F.Š.); (D.E.)
| | - Jiří Plachý
- Institute of Molecular Genetics, Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic; (A.K.); (V.K.); (J.P.); (M.R.); (D.K.); (J.G.); (F.Š.); (D.E.)
| | - Jakub Krijt
- Department of Pediatrics and Inherited Metabolic Disorders, Charles University, First Faculty of Medicine and General University Hospital in Prague, 128 08 Prague, Czech Republic; (J.K.); (V.K.)
| | - Markéta Reinišová
- Institute of Molecular Genetics, Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic; (A.K.); (V.K.); (J.P.); (M.R.); (D.K.); (J.G.); (F.Š.); (D.E.)
| | - Dana Kučerová
- Institute of Molecular Genetics, Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic; (A.K.); (V.K.); (J.P.); (M.R.); (D.K.); (J.G.); (F.Š.); (D.E.)
| | - Josef Geryk
- Institute of Molecular Genetics, Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic; (A.K.); (V.K.); (J.P.); (M.R.); (D.K.); (J.G.); (F.Š.); (D.E.)
| | - Jiří Kalina
- BIOPHARM, Research Institute of Biopharmacy and Veterinary Drugs, Pohoří-Chotouň 90, 254 49 Jílové u Prahy, Czech Republic; (P.T.); (J.M.); (J.K.)
| | - Filip Šenigl
- Institute of Molecular Genetics, Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic; (A.K.); (V.K.); (J.P.); (M.R.); (D.K.); (J.G.); (F.Š.); (D.E.)
| | - Daniel Elleder
- Institute of Molecular Genetics, Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic; (A.K.); (V.K.); (J.P.); (M.R.); (D.K.); (J.G.); (F.Š.); (D.E.)
| | - Viktor Kožich
- Department of Pediatrics and Inherited Metabolic Disorders, Charles University, First Faculty of Medicine and General University Hospital in Prague, 128 08 Prague, Czech Republic; (J.K.); (V.K.)
| | - Jiří Hejnar
- Institute of Molecular Genetics, Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic; (A.K.); (V.K.); (J.P.); (M.R.); (D.K.); (J.G.); (F.Š.); (D.E.)
- Correspondence:
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14
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Roth W, Mohamadzadeh M. Vitamin B12 and gut-brain homeostasis in the pathophysiology of ischemic stroke. EBioMedicine 2021; 73:103676. [PMID: 34749301 PMCID: PMC8586745 DOI: 10.1016/j.ebiom.2021.103676] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 10/14/2021] [Accepted: 10/22/2021] [Indexed: 12/31/2022] Open
Abstract
Stroke is a leading cause of morbidity and mortality worldwide. It inflicts immeasurable suffering on patients and their loved ones and carries an immense social cost. Efforts to mitigate the impact of stroke have focused on identifying therapeutic targets for the prevention and treatment. The gut microbiome represents one such potential target given its multifaceted effects on conditions known to cause and worsen the severity of stroke. Vitamin B12 (VB12) serves as a cofactor for two enzymes, methylmalonyl-CoA synthase and methionine synthase, vital for methionine and nucleotide biosynthesis. VB12 deficiency results in a buildup of metabolic substrates, such as homocysteine, that alter immune homeostasis and contribute to atherosclerotic disorders, including ischemic stroke. In addition to its support of cellular function, VB12 serves as a metabolic cofactor for gut microbes. By shaping microbial communities, VB12 further impacts local and peripheral immunity. Growing evidence suggests that gut dysbiosis-related immune dysfunction induced by VB12 deficiency may potentially contributes to stroke pathogenesis, its severity, and patient outcomes. In this review, we discuss the complex interactions of VB12, gut microbes and the associated metabolites, and immune homeostasis throughout the natural history of ischemic stroke.
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Affiliation(s)
- William Roth
- Department of Neurology, University of Florida, Gainesville, FL 32608, USA.
| | - Mansour Mohamadzadeh
- Division of Gastroenterology & Nutrition, Department of Medicine, College of Medicine, University of Texas Health, San Antonio, TX, USA.
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15
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Guéant JL, Guéant-Rodriguez RM, Kosgei VJ, Coelho D. Causes and consequences of impaired methionine synthase activity in acquired and inherited disorders of vitamin B 12 metabolism. Crit Rev Biochem Mol Biol 2021; 57:133-155. [PMID: 34608838 DOI: 10.1080/10409238.2021.1979459] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Methyl-Cobalamin (Cbl) derives from dietary vitamin B12 and acts as a cofactor of methionine synthase (MS) in mammals. MS encoded by MTR catalyzes the remethylation of homocysteine to generate methionine and tetrahydrofolate, which fuel methionine and cytoplasmic folate cycles, respectively. Methionine is the precursor of S-adenosyl methionine (SAM), the universal methyl donor of transmethylation reactions. Impaired MS activity results from inadequate dietary intake or malabsorption of B12 and inborn errors of Cbl metabolism (IECM). The mechanisms at the origin of the high variability of clinical presentation of impaired MS activity are classically considered as the consequence of the disruption of the folate cycle and related synthesis of purines and pyrimidines and the decreased synthesis of endogenous methionine and SAM. For one decade, data on cellular and animal models of B12 deficiency and IECM have highlighted other key pathomechanisms, including altered interactome of MS with methionine synthase reductase, MMACHC, and MMADHC, endoplasmic reticulum stress, altered cell signaling, and genomic/epigenomic dysregulations. Decreased MS activity increases catalytic protein phosphatase 2A (PP2A) and produces imbalanced phosphorylation/methylation of nucleocytoplasmic RNA binding proteins, including ELAVL1/HuR protein, with subsequent nuclear sequestration of mRNAs and dramatic alteration of gene expression, including SIRT1. Decreased SAM and SIRT1 activity induce ER stress through impaired SIRT1-deacetylation of HSF1 and hypomethylation/hyperacetylation of peroxisome proliferator-activated receptor-γ coactivator-1α (PGC1α), which deactivate nuclear receptors and lead to impaired energy metabolism and neuroplasticity. The reversibility of these pathomechanisms by SIRT1 agonists opens promising perspectives in the treatment of IECM outcomes resistant to conventional supplementation therapies.
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Affiliation(s)
- Jean-Louis Guéant
- UMR Inserm 1256 N-GERE (Nutrition, Génetique et Exposition aux Risques Environmentaux), Université de Lorraine, Vandoeuvre-lès-Nancy, France.,Departments of Digestive Diseases and Molecular Medicine and National Center of Inborn Errors of Metabolism, University Hospital Center, Université de Lorraine, Vandoeuvre-lès-Nancy, France
| | - Rosa-Maria Guéant-Rodriguez
- UMR Inserm 1256 N-GERE (Nutrition, Génetique et Exposition aux Risques Environmentaux), Université de Lorraine, Vandoeuvre-lès-Nancy, France.,Departments of Digestive Diseases and Molecular Medicine and National Center of Inborn Errors of Metabolism, University Hospital Center, Université de Lorraine, Vandoeuvre-lès-Nancy, France
| | - Viola J Kosgei
- UMR Inserm 1256 N-GERE (Nutrition, Génetique et Exposition aux Risques Environmentaux), Université de Lorraine, Vandoeuvre-lès-Nancy, France
| | - David Coelho
- UMR Inserm 1256 N-GERE (Nutrition, Génetique et Exposition aux Risques Environmentaux), Université de Lorraine, Vandoeuvre-lès-Nancy, France
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16
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Mosca P, Robert A, Alberto JM, Meyer M, Kundu U, Hergalant S, Umoret R, Coelho D, Guéant JL, Leheup B, Dreumont N. Vitamin B 12 Deficiency Dysregulates m6A mRNA Methylation of Genes Involved in Neurological Functions. Mol Nutr Food Res 2021; 65:e2100206. [PMID: 34291881 DOI: 10.1002/mnfr.202100206] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 07/05/2021] [Indexed: 11/12/2022]
Abstract
INTRODUCTION Vitamin B12 deficiency presents various neurological manifestations, such as cognitive dysfunction, mental retardation, or memory impairment. However, the involved molecular mechanisms remain to date unclear. Vitamin B12 is essential for synthesizing S-adenosyl methionine (SAM), the methyl group donor used for almost all transmethylation reactions. Here, we investigate the m6A methylation of mRNAs and their related gene expression in models of vitamin B12 deficiency. METHODS AND RESULTS This study observes two cellular models deficient in vitamin B12 and hippocampi of mice knock-out for the CD320 receptor. The decrease in SAM levels resulting from vitamin B12 deficiency is associated with m6 A reduced levels in mRNAs. This is also potentially mediated by the overexpression of the eraser FTO. We further investigate mRNA methylation of some genes involved in neurological functions targeted by the m6A reader YTH proteins. We notably observe a m6A hypermethylation of Prkca mRNA and a consistently increased expression of PKCα, a kinase involved in brain development and neuroplasticity, in the two cellular models. CONCLUSION Our data show that m6A methylation in mRNA could be one of the contributing mechanisms that underlie the neurological manifestations produced by vitamin B12 deficiency.
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Affiliation(s)
- Pauline Mosca
- Université de Lorraine, Inserm, NGERE, Nancy, F-54000, France
| | - Aurélie Robert
- Université de Lorraine, Inserm, NGERE, Nancy, F-54000, France
| | | | - Marie Meyer
- Université de Lorraine, Inserm, NGERE, Nancy, F-54000, France
| | - Urbi Kundu
- Université de Lorraine, Inserm, NGERE, Nancy, F-54000, France
| | | | - Rémy Umoret
- Université de Lorraine, Inserm, NGERE, Nancy, F-54000, France
| | - David Coelho
- Université de Lorraine, Inserm, NGERE, Nancy, F-54000, France
| | | | - Bruno Leheup
- Université de Lorraine, Inserm, NGERE, Nancy, F-54000, France
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17
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The avian retroviral receptor Tva mediates the uptake of transcobalamin bound vitamin B12 (cobalamin). J Virol 2021; 95:JVI.02136-20. [PMID: 33504597 PMCID: PMC8103681 DOI: 10.1128/jvi.02136-20] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
The Avian sarcoma and leukosis viruses (ASLVs) are important chicken pathogens. Some of the virus subgroups, including ASLV-A and K, utilize the Tva receptor for cell entrance. Though Tva was identified three decades ago, its physiological function remains unknown. Previously, we have noted an intriguing resemblance and orthology between the chicken gene coding for Tva and the human gene coding for CD320, a receptor involved in cellular uptake of transcobalamin (TC) in complex with vitamin B12/cobalamin (Cbl).Here we show that both the transmembrane and the glycosylphosphatidylinositol (GPI)-anchored form of Tva in the chicken cell line DF-1 promotes the uptake of Cbl with help of expressed and purified chicken TC. The uptake of TC-Cbl complex was monitored using an isotope- or fluorophore-labeled Cbl. We show that (i) TC-Cbl is internalized in chicken cells; and (ii) the uptake is lower in the Tva-knockout cells and higher in Tva-overexpressing cells when compared with wild type chicken cells. The relation between physiological function of Tva and its role in infection was elaborated by showing that infection with ASLV subgroups (targeting Tva) impairs the uptake of TC-Cbl, while this is not the case for cells infected with ASLV-B (not recognized by Tva). In addition, exposure of the cells to a high concentration of TC-Cbl alleviates the infection with Tva-dependent ASLV.IMPORTANCE: We demonstrate that the ASLV receptor Tva participates in the physiological uptake of TC-Cbl, because the viral infection suppresses the uptake of Cbl and vice versa. Our results pave the road for future studies addressing the issues: (i) whether a virus infection can be inhibited by TC-Cbl complexes in vivo; and (ii) whether any human virus employs the human TC-Cbl receptor CD320. In broader terms, our study sheds light on the intricate interplay between physiological roles of cellular receptors and their involvement in virus infection.
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18
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Dreumont N, Mimoun K, Pourié C, Quadros EV, Alberto JM, Umoret R, Helle D, Robert A, Daval JL, Guéant JL, Pourié G. Glucocorticoid Receptor Activation Restores Learning Memory by Modulating Hippocampal Plasticity in a Mouse Model of Brain Vitamin B 12 Deficiency. Mol Neurobiol 2021; 58:1024-1035. [PMID: 33078371 DOI: 10.1007/s12035-020-02163-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Accepted: 10/07/2020] [Indexed: 02/06/2023]
Abstract
Cobalamin (Cbl, vitamin B12) deficiency or inborn errors of Cbl metabolism can produce neurologic disorders resistant to therapies, including cognitive dysfunction, mild mental retardation, memory impairment, and confusion. We used Cd320 KO mouse as a model for studying the pathological mechanisms of these disorders. Cd320 encodes the receptor (TCblR) needed for the cellular uptake of Cbl in the brain. The Cd320-/- mouse model presented an impaired learning memory that could be alleviated by a moderate stress, which produced also a greater increase of plasma corticosterone, compared to wild type animals. The present study investigated such a putative rescue mechanism in Cbl-deficient mice. At the molecular level in the brain of Cd320-/- mouse, the decreased methylation status led to a downregulation of glucocorticoid nuclear receptor (GR)/PPAR-gamma co-activator-1 alpha (PGC-1α) pathway. This was evidenced by the decreased expression of GR, decreased methylation of GR and PGC1α, and decreased dimerization and interaction of GR with PGC1α. This led to altered synaptic activity evidenced by decreased interaction between the NMDA glutamatergic receptor and the PSD95 post-synaptic protein and a lower expression of Egr-1 and synapsin 1, in Cd320-/- mice compared to the wild type animals. Intraperitoneal injection of hydrocortisone rescued these molecular changes and normalized the learning memory tests. Our study suggests adaptive influences of moderate stress on loss of memory and cognition due to brain Cbl deficiency. The GR pathway could be a potential target for innovative therapy of cognitive manifestations in patients with poor response to conventional Cbl treatment.
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Affiliation(s)
- Natacha Dreumont
- Université de Lorraine, INSERM U1256, NGERE, F-54000, Nancy, France
| | - Khalid Mimoun
- Université de Lorraine, INSERM U1256, NGERE, F-54000, Nancy, France
| | - Carine Pourié
- Université de Lorraine, INSERM U1256, NGERE, F-54000, Nancy, France
| | - Edward V Quadros
- SUNY Downstate Medical Center, 450 Clarkson Avenue, Brooklyn, NY, 11203, USA
| | | | - Rémy Umoret
- Université de Lorraine, INSERM U1256, NGERE, F-54000, Nancy, France
| | - Déborah Helle
- Université de Lorraine, INSERM U1256, NGERE, F-54000, Nancy, France
| | - Aurélie Robert
- Université de Lorraine, INSERM U1256, NGERE, F-54000, Nancy, France
| | - Jean-Luc Daval
- Université de Lorraine, INSERM U1256, NGERE, F-54000, Nancy, France
| | | | - Grégory Pourié
- Université de Lorraine, INSERM U1256, NGERE, F-54000, Nancy, France.
- NGERE, INSERM U1256, Faculté de Médecine, 9 avenue de la forêt de Haye, BP 50184, 54505, Vandoeuvre Les Nancy CEDEX, France.
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19
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Optic neuropathy as a presenting feature of vitamin B-12 deficiency: A systematic review of literature and a case report. Ann Med Surg (Lond) 2020; 60:316-322. [PMID: 33204422 PMCID: PMC7653199 DOI: 10.1016/j.amsu.2020.11.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 11/01/2020] [Accepted: 11/01/2020] [Indexed: 02/06/2023] Open
Abstract
Introduction Vitamin B12 (VitB12) deficiency rarely manifests with visual symptoms. Optic nerve damage in VitB12 deficiency is thought to be via degeneration. However, optic neuritis, though infrequent, has been reported secondary to VitB12 deficiency. Material and methods We conducted a systematic review of all the reported cases of VitB12 deficiency with optic nerve involvement in Pubmed, Cochrane, and Google Scholar any date up to September 6, 2020. We have discussed the findings and compiled the available information on ophthalmological manifestations of VitB12 deficiency. We aim to provide a unified knowledge about the evidence related to types of optic neuropathies reported to date secondary to VitB12 deficiency. We also present a case of bilateral optic neuritis secondary to VitB12 deficiency. Presentation of case We present a 29-year-old previously healthy male with progressive, painful, bilateral, but asymmetric visual deterioration for forty-five days. A detailed history, examination, and laboratory workup were carried out. He was diagnosed as having optic neuritis secondary to VitB12 deficiency. He showed partial improvement with the replacement of VitB12. Conclusion We suggest promptly identifying and replacing VitB12 in patients with optic neuritis with proven VitB12 deficiency to prevent permanent damage to the optic nerve. Patients with VitB12 deficiency should have a baseline fundoscopic exam to rule out subclinical optic nerve damage. Moreover, patients who present with visual disturbances should be screened for VitB12 deficiency, especially the vegan population. B 12 deficiency can present with optic neuropathy as an initial manifestation. B 12 deficiency-induced optic neuropathy may be reversible if identified timely. In patients with visual disturbance, B12 levels should be checked with a fundus exam. A subclinical optic neuropathy should be ruled out in B12 deficient patients.
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Hamamura-Yasuno E, Iguchi T, Kumagai K, Tsuchiya Y, Mori K. Identification of the dog orthologue of human MAS-related G protein coupled receptor X2 (MRGPRX2) essential for drug-induced pseudo-allergic reactions. Sci Rep 2020; 10:16146. [PMID: 32999394 PMCID: PMC7527510 DOI: 10.1038/s41598-020-72819-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 09/07/2020] [Indexed: 12/03/2022] Open
Abstract
MAS-related G protein coupled receptor-X2 (MRGPRX2), expressed in human mast cells, is associated with drug-induced pseudo-allergic reactions. Dogs are highly susceptible to drug-induced anaphylactoid reactions caused by various drugs; however, the distribution and physiological function of canine MRGPR family genes, including MRGPRX2, remain largely unknown. In the present study, we clarified the distribution of dog MRGPR family genes by real-time quantitative PCR and in situ hybridisation. We also investigated the stimulatory effects of various histamine-releasing agents, including fluoroquinolones, on HEK293 cells transiently transfected with dog MRGPR family genes to identify their physiological function. Dog MRGPRX2 and MRGPRG were distributed in a limited number of tissues, including the skin (from the eyelid, abdomen, and cheek), whereas MRGPRD and MRGPRF were extensively expressed in almost all tissues examined. Histochemical and in situ hybridisation analyses revealed that MRGPRX2 was expressed in dog connective tissue-type mast cells in the skin. Intracellular Ca2+ mobilisation assay revealed that HEK293 cells, expressing dog MRGPRX2 or human MRGPRX2, but not dog MRGPRD, MRGPRF, and MRGPRG, responded to histamine-releasing agents. Our results suggest that dog MRGPRX2 is the functional orthologue of human MRGPRX2 and plays an essential role in drug-induced anaphylactoid reactions in dogs.
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Affiliation(s)
- Eri Hamamura-Yasuno
- Medicinal Safety Research Laboratories, Daiichi Sankyo Co., Ltd., 1-16-13 Kitakasai, Edogawa-ku, Tokyo, 134-8630, Japan.
| | - Takuma Iguchi
- Medicinal Safety Research Laboratories, Daiichi Sankyo Co., Ltd., 1-16-13 Kitakasai, Edogawa-ku, Tokyo, 134-8630, Japan
| | - Kazuyoshi Kumagai
- Medicinal Safety Research Laboratories, Daiichi Sankyo Co., Ltd., 1-16-13 Kitakasai, Edogawa-ku, Tokyo, 134-8630, Japan
| | - Yoshimi Tsuchiya
- Medicinal Safety Research Laboratories, Daiichi Sankyo Co., Ltd., 1-16-13 Kitakasai, Edogawa-ku, Tokyo, 134-8630, Japan
| | - Kazuhiko Mori
- Medicinal Safety Research Laboratories, Daiichi Sankyo Co., Ltd., 1-16-13 Kitakasai, Edogawa-ku, Tokyo, 134-8630, Japan
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Jaggers GK, Watkins BA, Rodriguez RL. COVID-19: repositioning nutrition research for the next pandemic. Nutr Res 2020; 81:1-6. [PMID: 32795724 PMCID: PMC7375285 DOI: 10.1016/j.nutres.2020.07.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 07/16/2020] [Accepted: 07/16/2020] [Indexed: 02/06/2023]
Affiliation(s)
- Grayson K Jaggers
- Department of Biological Sciences, University of Southern California, Los Angeles, CA.
| | - Bruce A Watkins
- Department of Nutrition, University of California, Davis, Davis, CA.
| | - Raymond L Rodriguez
- Department of Department of Molecular and Cellular Biology, University of California Davis, Davis, CA.
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Dokumaci DS, Dogan F, Geter S, Almaz V, Calik M. Does B12 deficiency lead to change in brain metabolites in pediatric population? A MR spectroscopy study. Neurol Sci 2019; 40:2319-2324. [PMID: 31240574 DOI: 10.1007/s10072-019-03990-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 06/19/2019] [Indexed: 11/27/2022]
Abstract
OBJECTIVES The aim of this study is to examine metabolite changes in different brain regions of the children with vitamin B12 deficiency disease using MR spectroscopy. METHODS Eighteen children with serum vit. B12 deficiency and 12 healthy volunteer children were included in the study. All children were examined with single-voxel spectroscopy examination via 1.5-Tesla MRI. The spectra were obtained from the left frontal periventricular white matter, left lentiform nucleus and left cerebellar hemisphere. The comparisons between patient group and control group were made with ratios calculated as NAA/Cr, Cho/Cr, mI/Cr, and Glx/Cr. All brain images were also examined in terms of brain atrophy, abnormal brain parenchyma intensity changes, or myelination status. RESULTS The children were between 3 months and 16 years old in the patient group, and between 3 months and 15 years old in the control group. There were no statistical differences in terms of metabolite ratios in the three different brain regions between the patients and control group. In two patients, periventricular white matter hyperintensities were observed. In four patients, brain atrophy was detected. DISCUSSION MR spectroscopy examination demonstrated that there were no statistical differences in terms of all metabolite ratios in left frontal periventricular white matter, left lentiform nucleus and left cerebellar hemisphere.
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Affiliation(s)
- Dilek Sen Dokumaci
- Department of Radiology, Harran University School of Medicine, Sanliurfa-Mardin Highway 18.Km, 63300, Sanliurfa, Turkey.
| | - Ferit Dogan
- Department of Radiology, Sanliurfa Training and Research Hospital, 63250, Sanliurfa, Turkey
| | - Suleyman Geter
- Department of Pediatrics, Sanliurfa Training and Research Hospital, 63250, Sanliurfa, Turkey
| | - Veysi Almaz
- Department of Pediatrics, Sanliurfa Training and Research Hospital, 63250, Sanliurfa, Turkey
| | - Mustafa Calik
- Department of Pediatrics, Harran University School of Medicine, 63300, Sanliurfa, Turkey
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