1
|
Parkhomenko YM, Vovk AI, Protasova ZS, Pylypchuk SY, Chorny SA, Pavlova OS, Mejenska OA, Chehovska LI, Stepanenko SP. Thiazolium salt mimics the non-coenzyme effects of vitamin B 1 in rat synaptosomes. Neurochem Int 2024; 178:105791. [PMID: 38880231 DOI: 10.1016/j.neuint.2024.105791] [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: 11/27/2023] [Revised: 06/01/2024] [Accepted: 06/06/2024] [Indexed: 06/18/2024]
Abstract
Long-term studies have confirmed a causal relationship between the development of neurodegenerative processes and vitamin B1 (thiamine) deficiency. However, the biochemical mechanisms underlying the high neurotropic activity of thiamine are not fully understood. At the same time, there is increasing evidence that vitamin B1, in addition to its coenzyme functions, may have non-coenzyme activities that are particularly important for neurons. To elucidate which effects of vitamin B1 in neurons are due to its coenzyme function and which are due to its non-coenzyme activity, we conducted a comparative study of the effects of thiamine and its derivative, 3-decyloxycarbonylmethyl-5-(2-hydroxyethyl)-4-methyl-1,3-thiazolium chloride (DMHT), on selected processes in synaptosomes. The ability of DMHT to effectively compete with thiamine for binding to thiamine-binding sites on the plasma membrane of synaptosomes and to participate as a substrate in the thiamine pyrophosphokinase reaction was demonstrated. In experiments with rat brain synaptosomes, unidirectional effects of DMHT and thiamine on the activity of the pyruvate dehydrogenase complex (PDC) and on the incorporation of radiolabeled [2-14C]pyruvate into acetylcholine were demonstrated. The observed effects of thiamine and DMHT on the modulation of acetylcholine synthesis can be explained by suggesting that both compounds, which interact in cells with enzymes of thiamine metabolism, are phosphorylated and exert an inhibitory/activating effect (concentration-dependent) on PDC activity by affecting the regulatory enzymes of the complex. Such effects were not observed in the presence of structural analogs of thiamine and DMHT without a 2-hydroxyethyl substituent at position 5 of the thiazolium cycle. The effect of DMHT on the plasma membrane Ca-ATPase was similar to that of thiamine. At the same time, DMHT showed high cytostatic activity against neuroblastoma cells.
Collapse
Affiliation(s)
- Yu M Parkhomenko
- Department of Vitamins and Coenzymes Biochemistry, Palladin Institute of Biochemistry of the National Academy of Sciences of Ukraine, Kyiv 01054, Ukraine.
| | - A I Vovk
- Department of Bioorganic Mechanisms, V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the National Academy of Sciences of Ukraine, Kyiv, 02094, Ukraine
| | - Z S Protasova
- Department of Vitamins and Coenzymes Biochemistry, Palladin Institute of Biochemistry of the National Academy of Sciences of Ukraine, Kyiv 01054, Ukraine
| | - S Yu Pylypchuk
- Department of Vitamins and Coenzymes Biochemistry, Palladin Institute of Biochemistry of the National Academy of Sciences of Ukraine, Kyiv 01054, Ukraine
| | - S A Chorny
- Department of Vitamins and Coenzymes Biochemistry, Palladin Institute of Biochemistry of the National Academy of Sciences of Ukraine, Kyiv 01054, Ukraine
| | - O S Pavlova
- Department of Vitamins and Coenzymes Biochemistry, Palladin Institute of Biochemistry of the National Academy of Sciences of Ukraine, Kyiv 01054, Ukraine
| | - O A Mejenska
- Department of Vitamins and Coenzymes Biochemistry, Palladin Institute of Biochemistry of the National Academy of Sciences of Ukraine, Kyiv 01054, Ukraine
| | - L I Chehovska
- Department of Vitamins and Coenzymes Biochemistry, Palladin Institute of Biochemistry of the National Academy of Sciences of Ukraine, Kyiv 01054, Ukraine
| | - S P Stepanenko
- Department of Vitamins and Coenzymes Biochemistry, Palladin Institute of Biochemistry of the National Academy of Sciences of Ukraine, Kyiv 01054, Ukraine
| |
Collapse
|
2
|
Zhou D, Wang C, Zheng J, Zhao J, Wei S, Xiong Y, Limbu SM, Kong Y, Cao F, Ding Z. Dietary thiamine modulates carbohydrate metabolism, antioxidant status, and alleviates hypoxia stress in oriental river prawn Macrobrachium nipponense (de Haan). FISH & SHELLFISH IMMUNOLOGY 2022; 131:42-53. [PMID: 36191902 DOI: 10.1016/j.fsi.2022.09.059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 09/21/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
Hypoxia is one of the challenges in prawns aquaculture. However, the role of thiamine, which is a coenzyme in carbohydrate metabolism with antioxidant properties, in reducing hypoxia in prawns aquaculture is currently unknown. We investigated the effects of thiamine on antioxidant status, carbohydrate metabolism and acute hypoxia in oriental river prawn, Macrobrachium nipponense. One thousand eight hundred prawns (0.123 ± 0.003 g) were fed five diets (60 prawns each tank, six replicates per diet) supplemented with graded thiamine levels (5.69, 70.70, 133.67, 268.33 and 532.00 mg/kg dry mater) for eight weeks and then exposed to hypoxia stress for 12 h followed by reoxyegnation for 12 h. The results showed that, under normoxia, prawns fed the 133.67 or 268.33 mg/kg thiamine diet had significantly lower glucose 6-phosphatedehydrogenase, succinate dehydrogenase and phosphoenolpyruvate carboxykinase activities than those fed the other diets. Moreover, total antioxidant capacity (T-AOC) increased significantly when prawns were fed the 133.67 mg/kg thiamine diet. Superoxide dismutase (SOD) activity and malonaldehyde (MDA) content also increased significantly when prawns were fed the 268.33 or 532.00 mg/kg thiamine diet under hypoxia. And the significantly increased SOD activity and MDA level also observed in prawns fed 532.00 mg/kg thiamine under reoxygenation. Under normoxia, prawns fed the 70.70 or 133.67 mg/kg thiamine diet decreased the mRNA expressions of AMP-activated protein kinase-alpha (AMPK-α), pyruvate dehydrogenase-E1-α subunit (PDH-E1-α) and hypoxia-inducible factor-1s (HIF-1α, HIF-1β), but increased the mRNA expressions of phosphofructokinase (PFK) significantly. After 12 h of hypoxia, the energy metabolism related genes (AMPK-β, AMPK-γ, PFK, PDH-E1-α), hypoxia-inducible factor related genes (HIF-1α, HIF-1β) and thiamine transporter gene (SLC19A2) were up-regulated significantly in prawns fed the 133.67 or 268.33 mg/kg thiamine diets. After 12 h of reoxygenation, prawns fed the 133.67 or 268.33 mg/kg diet significantly decreased the SOD activity, MDA level and SLC19A2 mRNA expression compared with other diets. The optimum thiamine was 161.20 mg/kg for minimum MDA content and 143.17 mg/kg for maximum T-AOC activity based on cubic regression analysis. In summary, supplementing 143.17 to 161.20 mg/kg thiamine in the diets for M. nipponense improves the antioxidant capacity under normoxia and reduces the oxidative damage under hypoxia stress.
Collapse
Affiliation(s)
- Dongsheng Zhou
- Zhejiang Provincial Key Laboratory of Aquatic Resources Conservation and Development, College of Life Science, Huzhou University, Huzhou, Zhejiang, 313000, China
| | - Chengli Wang
- Jiangsu Agri-animal Husbandry Vocational College, Jiangsu, China
| | - Jinxian Zheng
- Zhejiang Provincial Key Laboratory of Aquatic Resources Conservation and Development, College of Life Science, Huzhou University, Huzhou, Zhejiang, 313000, China
| | - Jianhua Zhao
- Zhejiang Provincial Key Laboratory of Aquatic Resources Conservation and Development, College of Life Science, Huzhou University, Huzhou, Zhejiang, 313000, China
| | - Shanshan Wei
- Zhejiang Provincial Key Laboratory of Aquatic Resources Conservation and Development, College of Life Science, Huzhou University, Huzhou, Zhejiang, 313000, China
| | - Yunfeng Xiong
- Zhejiang Provincial Key Laboratory of Aquatic Resources Conservation and Development, College of Life Science, Huzhou University, Huzhou, Zhejiang, 313000, China
| | - Samwel Mchele Limbu
- Department of Aquaculture Technology, School of Aquatic Sciences and Fisheries Technology, University of Dar es Salaam, P.O. Box 35091, Dar es Salaam, Tanzania
| | - Youqin Kong
- Zhejiang Provincial Key Laboratory of Aquatic Resources Conservation and Development, College of Life Science, Huzhou University, Huzhou, Zhejiang, 313000, China
| | - Fang Cao
- Zhejiang Provincial Key Laboratory of Aquatic Resources Conservation and Development, College of Life Science, Huzhou University, Huzhou, Zhejiang, 313000, China
| | - Zhili Ding
- Zhejiang Provincial Key Laboratory of Aquatic Resources Conservation and Development, College of Life Science, Huzhou University, Huzhou, Zhejiang, 313000, China.
| |
Collapse
|
3
|
Thiamine as a Possible Neuroprotective Strategy in Neonatal Hypoxic-Ischemic Encephalopathy. Antioxidants (Basel) 2021; 11:antiox11010042. [PMID: 35052546 PMCID: PMC8772822 DOI: 10.3390/antiox11010042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/21/2021] [Accepted: 12/22/2021] [Indexed: 02/08/2023] Open
Abstract
On the basis that similar biochemical and histological sequences of events occur in the brain during thiamine deficiency and hypoxia/ischemia related brain damage, we have planned this review to discuss the possible therapeutic role of thiamine and its derivatives in the management of neonatal hypoxic-ischemic encephalopathy (HIE). Among the many benefits, thiamine per se as antioxidant, given intravenously (IV) at high doses, defined as dosage greater than 100 mg IV daily, should counteract the damaging effects of reactive oxygen and nitrogen species in the brain, including the reaction of peroxynitrite with the tyrosine residues of the major enzymes involved in intracellular glucose metabolism, which plays a key pathophysiological role in HIE in neonates. Accordingly, it is conceivable that, in neonatal HIE, the blockade of intracellular progressive oxidative stress and the rescue of mitochondrial function mediated by thiamine and its derivatives can lead to a definite neuroprotective effect. Because therapeutic hypothermia and thiamine may both act on the latent period of HIE damage, a synergistic effect of these therapeutic strategies is likely. Thiamine treatment may be especially important in mild HIE and in areas of the world where there is limited access to expensive hypothermia equipment.
Collapse
|
4
|
Pacei F, Tesone A, Laudi N, Laudi E, Cretti A, Pnini S, Varesco F, Colombo C. The Relevance of Thiamine Evaluation in a Practical Setting. Nutrients 2020; 12:nu12092810. [PMID: 32933220 PMCID: PMC7551939 DOI: 10.3390/nu12092810] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 09/03/2020] [Accepted: 09/05/2020] [Indexed: 02/07/2023] Open
Abstract
Thiamine is a crucial cofactor involved in the maintenance of carbohydrate metabolism and participates in multiple cellular metabolic processes. Although thiamine can be obtained from various food sources, some common food groups are deficient in thiamine, and it can be denatured by high temperature and pH. Additionally, different drugs can alter thiamine metabolism. In addition, the half-life of thiamine in the body is between 1 and 3 weeks. All these factors could provide an explanation for the relatively short period needed to develop thiamine deficiency and observe the consequent clinical symptoms. Thiamine deficiency could lead to neurological and cardiological problems. These clinical conditions could be severe or even fatal. Marginal deficiency too may promote weaker symptoms that might be overlooked. Patients undergoing upper gastrointestinal or pancreatic surgery could have or develop thiamine deficiency for many different reasons. To achieve the best outcome for these patients, we strongly recommend the execution of both an adequate preoperative nutritional assessment, which includes thiamine evaluation, and a close nutritional follow up to avoid a nutrient deficit in the postoperative period.
Collapse
Affiliation(s)
- Federico Pacei
- ASST Nord Milano, UOC Neurologia, Ospedale Bassini, 20092 Cinisello Balsamo, Italy
- Department of Physical Rehabilitation, Casa di Cura Bonvicini, Via Michael Pacher 12, 39100 Bolzano, Italy; (A.T.); (E.L.); (A.C.); (S.P.); (F.V.)
- Correspondence:
| | - Antonella Tesone
- Department of Physical Rehabilitation, Casa di Cura Bonvicini, Via Michael Pacher 12, 39100 Bolzano, Italy; (A.T.); (E.L.); (A.C.); (S.P.); (F.V.)
| | - Nazzareno Laudi
- Faculty of Medicine and Surgery, Medizinische Universitat Innsbruck, Christoph-Probst-Platz 1, Innrain 52 A, 6020 Innsbruck, Austria;
| | - Emanuele Laudi
- Department of Physical Rehabilitation, Casa di Cura Bonvicini, Via Michael Pacher 12, 39100 Bolzano, Italy; (A.T.); (E.L.); (A.C.); (S.P.); (F.V.)
| | - Anna Cretti
- Department of Physical Rehabilitation, Casa di Cura Bonvicini, Via Michael Pacher 12, 39100 Bolzano, Italy; (A.T.); (E.L.); (A.C.); (S.P.); (F.V.)
| | - Shira Pnini
- Department of Physical Rehabilitation, Casa di Cura Bonvicini, Via Michael Pacher 12, 39100 Bolzano, Italy; (A.T.); (E.L.); (A.C.); (S.P.); (F.V.)
| | - Fabio Varesco
- Department of Physical Rehabilitation, Casa di Cura Bonvicini, Via Michael Pacher 12, 39100 Bolzano, Italy; (A.T.); (E.L.); (A.C.); (S.P.); (F.V.)
| | - Chiara Colombo
- Lombardy Regional Course for General Practitioner, PoliS-Lombardia, Via Taramelli 12/F, 20100 Milano, Italy;
| |
Collapse
|
5
|
Chen H, Cross AC, Thakkar A, Xu H, Li A, Paull D, Noggle SA, Kruger L, Denton TT, Gibson GE. Selective linkage of mitochondrial enzymes to intracellular calcium stores differs between human-induced pluripotent stem cells, neural stem cells, and neurons. J Neurochem 2020; 156:867-879. [PMID: 32865230 DOI: 10.1111/jnc.15160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 08/12/2020] [Accepted: 08/13/2020] [Indexed: 12/15/2022]
Abstract
Mitochondria and releasable endoplasmic reticulum (ER) calcium modulate neuronal calcium signaling, and both change in Alzheimer's disease (AD). The releasable calcium stores in the ER are exaggerated in fibroblasts from AD patients and in multiple models of AD. The activity of the alpha-ketoglutarate dehydrogenase complex (KGDHC), a key mitochondrial enzyme complex, is diminished in brains from AD patients, and can be plausibly linked to plaques and tangles. Our previous studies in cell lines and mouse neurons demonstrate that reductions in KGDHC increase the ER releasable calcium stores. The goal of these studies was to test whether the relationship was true in human iPSC-derived neurons. Inhibition of KGDHC for one or 24 hr increased the ER releasable calcium store in human neurons by 69% and 144%, respectively. The effect was mitochondrial enzyme specific because inhibiting the pyruvate dehydrogenase complex, another key mitochondrial enzyme complex, diminished the ER releasable calcium stores. The link of KGDHC to ER releasable calcium stores was cell type specific as the interaction was not present in iPSC or neural stem cells. Thus, these studies in human neurons verify a link between KGDHC and releasable ER calcium stores, and support the use of human neurons to examine mechanisms and potential therapies for AD.
Collapse
Affiliation(s)
- Huanlian Chen
- Burke Neurological Institute, Brain and Mind Research Institute, Weill Cornell Medicine, White Plains, NY, USA
| | - Abigail C Cross
- Burke Neurological Institute, Brain and Mind Research Institute, Weill Cornell Medicine, White Plains, NY, USA
| | - Ankita Thakkar
- Burke Neurological Institute, Brain and Mind Research Institute, Weill Cornell Medicine, White Plains, NY, USA
| | - Hui Xu
- Burke Neurological Institute, Brain and Mind Research Institute, Weill Cornell Medicine, White Plains, NY, USA
| | - Aiqun Li
- The New York Stem Cell Foundation Research Institute, New York, NY, USA.,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Dan Paull
- The New York Stem Cell Foundation Research Institute, New York, NY, USA
| | - Scott A Noggle
- The New York Stem Cell Foundation Research Institute, New York, NY, USA
| | - Laken Kruger
- Department of Pharmaceutical Sciences, Washington State University, College of Pharmacy and Pharmaceutical Sciences, Spokane, WA, USA
| | - Travis T Denton
- Department of Pharmaceutical Sciences, Washington State University, College of Pharmacy and Pharmaceutical Sciences, Spokane, WA, USA
| | - Gary E Gibson
- Burke Neurological Institute, Brain and Mind Research Institute, Weill Cornell Medicine, White Plains, NY, USA
| |
Collapse
|
6
|
Marcé-Grau A, Martí-Sánchez L, Baide-Mairena H, Ortigoza-Escobar JD, Pérez-Dueñas B. Genetic defects of thiamine transport and metabolism: A review of clinical phenotypes, genetics, and functional studies. J Inherit Metab Dis 2019; 42:581-597. [PMID: 31095747 DOI: 10.1002/jimd.12125] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 05/13/2019] [Accepted: 05/14/2019] [Indexed: 01/19/2023]
Abstract
Thiamine is a crucial cofactor involved in the maintenance of carbohydrate metabolism and participates in multiple cellular metabolic processes within the cytosol, mitochondria, and peroxisomes. Currently, four genetic defects have been described causing impairment of thiamine transport and metabolism: SLC19A2 dysfunction leads to diabetes mellitus, megaloblastic anemia and sensory-neural hearing loss, whereas SLC19A3, SLC25A19, and TPK1-related disorders result in recurrent encephalopathy, basal ganglia necrosis, generalized dystonia, severe disability, and early death. In order to achieve early diagnosis and treatment, biomarkers play an important role. SLC19A3 patients present a profound decrease of free-thiamine in cerebrospinal fluid (CSF) and fibroblasts. TPK1 patients show decreased concentrations of thiamine pyrophosphate in blood and muscle. Thiamine supplementation has been shown to improve diabetes and anemia control in Rogers' syndrome patients due to SLC19A2 deficiency. In a significant number of patients with SLC19A3, thiamine improves clinical outcome and survival, and prevents further metabolic crisis. In SLC25A19 and TPK1 defects, thiamine has also led to clinical stabilization in single cases. Moreover, thiamine supplementation leads to normal concentrations of free-thiamine in the CSF of SLC19A3 patients. Herein, we present a literature review of the current knowledge of the disease including related clinical phenotypes, treatment approaches, update of pathogenic variants, as well as in vitro and in vivo functional models that provide pathogenic evidence and propose mechanisms for thiamine deficiency in humans.
Collapse
Affiliation(s)
- Anna Marcé-Grau
- Pediatric Neurology Research Group, Hospital Vall d'Hebron and Research Institute (VHIR), Barcelona, Spain
| | - Laura Martí-Sánchez
- Department of Clinical Biochemistry, Hospital Sant Joan de Déu Barcelona, Barcelona, Spain
- Universitat de Barcelona, Barcelona, Spain
| | - Heidy Baide-Mairena
- Pediatric Neurology Research Group, Hospital Vall d'Hebron and Research Institute (VHIR), Barcelona, Spain
| | | | - Belén Pérez-Dueñas
- Pediatric Neurology Research Group, Hospital Vall d'Hebron and Research Institute (VHIR), Barcelona, Spain
- Centre for Biochemical Research in Rare Diseases (CIBERER), Valencia, Spain
| |
Collapse
|
7
|
Song N, Li Z, Cui Z, Chen L, Cui Y, Dang G, Li Z, Li H, Liu S. The prominent alteration in transcriptome and metabolome of Mycobacterium bovis BCG str. Tokyo 172 induced by vitamin B 1. BMC Microbiol 2019; 19:104. [PMID: 31117936 PMCID: PMC6530141 DOI: 10.1186/s12866-019-1492-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 05/14/2019] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Vitamin B1 (VB1) is a crucial dietary nutrient and essential cofactor for several key enzymes in the regulation of cellular and metabolic processes, and more importantly in the activation of immune system. To date, the precise role of VB1 in Mycobacterium tuberculosis remains to be fully understood. RESULTS In this study, the transcriptional and metabolic profiles of VB1-treated Mycobacterium. bovis BCG were analyzed by RNA-sequencing and LC-MS (Liquid chromatography coupled to mass spectrometry). The selection of BCG strain was based on its common physiological features shared with M. tuberculosis. The results of cell growth assays demonstrated that VB1 inhibited the BCG growth rate in vitro. Transcriptomic analysis revealed that the expression levels of genes related to fatty acid metabolism, cholesterol metabolism, glycolipid catabolism, DNA replication, protein translation, cell division and cell wall formation were significantly downregulated in M. bovis BCG treated with VB1. In addition, the metabolomics LC-MS data indicated that most of the amino acids and adenosine diphosphate (ADP) were decreased in M. bovis BCG strain after VB1 treatment. CONCLUSIONS This study provides the molecular and metabolic bases to understand the impacts of VB1 on M.bovis BCG.
Collapse
Affiliation(s)
- Ningning Song
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Zhaoli Li
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Ziyin Cui
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Liping Chen
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Yingying Cui
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Guanghui Dang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Zhe Li
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - He Li
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Siguo Liu
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| |
Collapse
|
8
|
Mkrtchyan GV, Üçal M, Müllebner A, Dumitrescu S, Kames M, Moldzio R, Molcanyi M, Schaefer S, Weidinger A, Schaefer U, Hescheler J, Duvigneau JC, Redl H, Bunik VI, Kozlov AV. Thiamine preserves mitochondrial function in a rat model of traumatic brain injury, preventing inactivation of the 2-oxoglutarate dehydrogenase complex. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2018; 1859:925-931. [DOI: 10.1016/j.bbabio.2018.05.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 05/03/2018] [Accepted: 05/10/2018] [Indexed: 01/08/2023]
|
9
|
Chou WP, Chang YH, Lin HC, Chang YH, Chen YY, Ko CH. Thiamine for preventing dementia development among patients with alcohol use disorder: A nationwide population-based cohort study. Clin Nutr 2018; 38:1269-1273. [PMID: 29843940 DOI: 10.1016/j.clnu.2018.05.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 04/02/2018] [Accepted: 05/11/2018] [Indexed: 12/28/2022]
Abstract
OBJECTIVE OF STUDY Alcohol use disorder is one of the most important factors contributing to dementia. This study examined the protective effect of thiamine administration on the incidence of dementia among patients with alcohol use disorder in Taiwan by evaluating a nationwide database. METHODS We retrieved data for this retrospective cohort study from the Longitudinal Health Insurance Database 1995-2000. Patients receiving thiamine therapy after the diagnosis of alcohol use disorder were recruited as the thiamine therapy (TT) group, and the comparison group without TT (NTT group) included randomly assigned and age-, sex-, and index year-matched individuals with alcohol use disorder. Demographic data, comorbid medical disorders, and psychotropic medication use were evaluated and controlled. The cumulative defined daily dose (DDD) was analyzed to demonstrate the dose effect. RESULTS Each group had 5059 patients. The TT group had a lower crude hazard ratio (0.76; 95% confidence interval: 0.60-0.96) of dementia than the NTT group. After adjusting for demographic data, comorbidity, and psychotropic medication use, the adjusted hazard ratio was 0.54 (95% confidence interval: 0.43-0.69). The significance existed among TT subjects with cumulative DDD higher than 23. The Kaplan-Meier analysis demonstrated a lower cumulative incidence of dementia in the TT group than in the NTT group. CONCLUSION The results indicated that thiamine therapy could be a protective factor for dementia development in patients with alcohol use disorder. Thiamine therapy should be a crucial part of the treatment plan and health policies to prevent dementia development or progression among patients with alcohol use disorder.
Collapse
Affiliation(s)
- Wei-Po Chou
- Department of Psychiatry, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; Department of Psychiatry, Tsyr-Huey Mental Hospital, Kaohsiung Jen-Ai's Home, Kaohsiung, Taiwan
| | - Yu-Han Chang
- Department of Psychiatry, Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung, Taiwan
| | - Hung-Chi Lin
- Department of Psychiatry, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yi-Hsin Chang
- Department of Psychiatry, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Yun-Yu Chen
- Department of Psychiatry, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Chih-Hung Ko
- Department of Psychiatry, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; Department of Psychiatry, Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung, Taiwan; Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.
| |
Collapse
|
10
|
Gernone F, Ricciardi M. A novel encephalopathy in a thiamine-deficient dog resembling human Wernicke's disease with atypical MRI pattern. Open Vet J 2017; 7:313-318. [PMID: 29138746 PMCID: PMC5681729 DOI: 10.4314/ovj.v7i4.4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 10/20/2017] [Indexed: 11/24/2022] Open
Abstract
Thiamine is a water-soluble vitamin, which participates in several vital metabolic pathways involved in energy metabolism and neurotransmitter synthesis of mammals. In companion animals thiamine deficiency is classically associated with signs of diffuse encephalopathy and lesions on brainstem nuclei and mesencephalic colliculi evident on magnetic resonance imaging. This paper describes a novel clinical presentation in a thiamine-deficient dog showing multifocal, central and peripheral nervous and cardiovascular system alterations. Brain MRI showed bilateral caudate nuclei damage, with necrotic-malacic evolution, similar to the atypical MRI pattern found in Wernicke’s encephalopathy in humans. Detection of bilateral symmetrical lesions of the caudate nuclei in dogs should prompt consideration of a thiamine deficiency among the differential diagnoses.
Collapse
Affiliation(s)
| | - Mario Ricciardi
- "Pingry" Veterinary Hospital, via Medaglie d'Oro 5, Bari, Italy
| |
Collapse
|
11
|
Bâ A. Alcohol and thiamine deficiency trigger differential mitochondrial transition pore opening mediating cellular death. Apoptosis 2017; 22:741-752. [DOI: 10.1007/s10495-017-1372-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
12
|
OLIVEIRA CARLOSH, SIMÃO ANDERSONA, TRENTO MARCUSV, CÉSAR PEDROH, MARCUSSI SILVANA. Inhibition of proteases and phospholipases A2 from Bothrops atrox and Crotalus durissus terrificus snake venoms by ascorbic acid, vitamin E, and B-complex vitamins. AN ACAD BRAS CIENC 2016; 88:2005-2016. [DOI: 10.1590/0001-3765201620160030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 05/26/2016] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT The enzyme inhibition by natural and/ or low-cost compounds may represent a valuable adjunct to traditional serotherapy performed in cases of snakebite, mainly with a view to mitigate the local effects of envenoming. The objective of this study was to evaluate possible interactions between vitamins and enzymes that comprise Bothrops atrox and Crotalus durissus terrificus venoms, in vitro. Proteolysis inhibition assays (substrates: azocasein, collagen, gelatin and fibrinogen), hemolysis, coagulation, hemagglutination were carried out using different proportions of vitamins in face of to inhibit minimum effective dose of each venom. The vitamins were responsible for reducing 100% of breaking azocasein by C.d.t. venom, thrombolysis induced by B. atrox and fibrinogenolysis induced by both venoms. It is suggested the presence of interactions between vitamin and the active site of enzymes, for example the interactions between hydrophobic regions present in the enzymes and vitamin E, as well as the inhibitions exercised by antioxidant mechanism.
Collapse
|
13
|
Gibson GE, Hirsch JA, Fonzetti P, Jordan BD, Cirio RT, Elder J. Vitamin B1 (thiamine) and dementia. Ann N Y Acad Sci 2016; 1367:21-30. [PMID: 26971083 DOI: 10.1111/nyas.13031] [Citation(s) in RCA: 115] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 01/22/2016] [Accepted: 01/26/2016] [Indexed: 11/28/2022]
Abstract
The earliest and perhaps best example of an interaction between nutrition and dementia is related to thiamine (vitamin B1). Throughout the last century, research showed that thiamine deficiency is associated with neurological problems, including cognitive deficits and encephalopathy. Multiple similarities exist between classical thiamine deficiency and Alzheimer's disease (AD) in that both are associated with cognitive deficits and reductions in brain glucose metabolism. Thiamine-dependent enzymes are critical components of glucose metabolism that are reduced in the brains of AD patients and by thiamine decline, and a decrease in their levels could account for the reduction in glucose metabolism. In preclinical models, reduced thiamine can drive AD-like abnormalities, including memory deficits, neuritic plaques, and hyperphosphorylation of tau. Furthermore, excess thiamine diminishes AD-like pathologies. In addition to dietary deficits, drugs or other manipulations that interfere with thiamine absorption can cause thiamine deficiency. Elucidating the reasons why the brains of AD patients are functionally thiamine deficient and determining the effects of thiamine restoration may provide critical information to help treat patients with AD.
Collapse
Affiliation(s)
- Gary E Gibson
- Brain and Mind Research Institute, Weill Cornell Medical College, New York, New York, and Burke Medical Research Institute, White Plains, New York
| | | | | | | | | | - Jessica Elder
- Brain and Mind Research Institute, Weill Cornell Medical College, New York, New York, and Burke Medical Research Institute, White Plains, New York
| |
Collapse
|
14
|
Dong W, Stockwell VO, Goyer A. Enhancement of Thiamin Content in Arabidopsis thaliana by Metabolic Engineering. PLANT & CELL PHYSIOLOGY 2015; 56:2285-96. [PMID: 26454882 DOI: 10.1093/pcp/pcv148] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 10/02/2015] [Indexed: 05/06/2023]
Abstract
Thiamin is an essential nutrient in the human diet. Severe thiamin deficiency leads to beriberi, a lethal disease which is common in developing countries. Thiamin biofortification of staple food crops is a possible strategy to alleviate thiamin deficiency-related diseases. In plants, thiamin plays a role in the response to abiotic and biotic stresses, and data from the literature suggest that boosting thiamin content could increase resistance to stresses. Here, we tested an engineering strategy to increase thiamin content in Arabidopsis. Thiamin is composed of a thiazole ring linked to a pyrimidine ring by a methylene bridge. THI1 and THIC are the first committed steps in the synthesis of the thiazole and pyrimidine moieties, respectively. Arabidopsis plants were transformed with a vector containing the THI1-coding sequence under the control of a constitutive promoter. Total thiamin leaf content in THI1 plants was up approximately 2-fold compared with the wild type. THI1-overexpressing lines were then crossed with pre-existing THIC-overexpressing lines. Resulting THI1 × THIC plants accumulated up to 3.4- and 2.6-fold more total thiamin than wild-type plants in leaf and seeds, respectively. After inoculation with Pseudomonas syringae, THI1 × THIC plants had lower populations than the wild-type control. However, THI1 × THIC plants subjected to various abiotic stresses did not show any visible or biochemical changes compared with the wild type. We discuss the impact of engineering thiamin biosynthesis on the nutritional value of plants and their resistance to biotic and abiotic stresses.
Collapse
Affiliation(s)
- Wei Dong
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR 97330, USA Hermiston Agricultural Research and Extension Center, Oregon State University, 2121 S First Street, Hermiston, OR 97838, USA Present address: Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA
| | - Virginia O Stockwell
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR 97330, USA
| | - Aymeric Goyer
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR 97330, USA Hermiston Agricultural Research and Extension Center, Oregon State University, 2121 S First Street, Hermiston, OR 97838, USA
| |
Collapse
|
15
|
Oliveira CHDM, Assaid Simão A, Marcussi S. Inhibitory effects of ascorbic acid, vitamin E, and vitamin B-complex on the biological activities induced by Bothrops venom. PHARMACEUTICAL BIOLOGY 2015; 54:845-852. [PMID: 26452622 DOI: 10.3109/13880209.2015.1087038] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
CONTEXT Natural compounds have been widely studied with the aim of complementing antiophidic serum therapy. OBJECTIVE The present study evaluated the inhibitory potential of ascorbic acid and a vitamin complex, composed of ascorbic acid, vitamin E, and all the B-complex vitamins, on the biological activities induced by snake venoms. MATERIAL AND METHODS The effect of vitamins was evaluated on the phospholipase, proteolytic, coagulant, and fibrinogenolytic activities induced by Bothrops moojeni (Viperidae), B. jararacussu, and B. alternatus snake venoms, and the hemagglutinating activity induced by B. jararacussu venom. RESULTS The vitamin complex (1:5 and 1:10 ratios) totally inhibited the fibrinogenolytic activity and partially the phospholipase activity and proteolytic activity on azocasein induced by the evaluated venoms. Significant inhibition was observed in the coagulation of human plasma induced by venoms from B. alternatus (1:2.5 and 1:5, to vitamin complex and ascorbic acid) and B. moojeni (1:2.5 and 1:5, to vitamin complex and ascorbic acid). Ascorbic acid inhibited 100% of the proteolytic activities of B. moojeni and B. alternatus on azocasein, at 1:10 ratio, the effects of all the venoms on fibrinogen, the hemagglutinating activity of B. jararacussu venom, and also extended the plasma coagulation time induced by all venoms analyzed. DISCUSSION AND CONCLUSION The vitamins analyzed showed relevant in vitro inhibitory potential over the activities induced by Bothrops venoms, suggesting their interaction with toxins belonging to the phospholipase A2, protease, and lectin classes. The results can aid further research in clarifying the possible mechanisms of interaction between vitamins and snake enzymes.
Collapse
Affiliation(s)
- Carlos Henrique de Moura Oliveira
- a Biochemistry Laboratory, Department of Chemistry , Universidade Federal De Lavras (UFLA) , Campus UFLA , Lavras , Minas Gerais , Brazil
| | - Anderson Assaid Simão
- a Biochemistry Laboratory, Department of Chemistry , Universidade Federal De Lavras (UFLA) , Campus UFLA , Lavras , Minas Gerais , Brazil
| | - Silvana Marcussi
- a Biochemistry Laboratory, Department of Chemistry , Universidade Federal De Lavras (UFLA) , Campus UFLA , Lavras , Minas Gerais , Brazil
| |
Collapse
|
16
|
Kinebuchi M, Matsuura A. Calcium-overloaded sympathetic preganglionic neurons in a case of severe sepsis with anorexia nervosa. Acute Med Surg 2014; 2:169-175. [PMID: 29123716 PMCID: PMC5667258 DOI: 10.1002/ams2.100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Accepted: 10/19/2014] [Indexed: 12/29/2022] Open
Abstract
Aim We aimed to show the status of intracellular elements in sympathetic preganglionic neurons in an autopsy case of a 55‐year‐old woman with severe sepsis and cardiac dysfunction with anorexia nervosa. Methods Our methods include a case report and pathological examinations of autopsied tissues using synchrotron‐generated microbeam X‐ray fluorescence analysis. Results A case report of severe sepsis and myocardial dysfunction. The patient had sudden short cardiac arrest without arrhythmia and sequelae, and echocardiogram showed negative inotropic change. The X‐ray fluorescence analysis of autopsied tissues indicated an unusually high concentration of cytosolic calcium in sympathetic preganglionic neurons. However, there were no significant pathological findings of damage in the heart or the cardiovascular autonomic nuclei in the central nervous system. Conclusion The data indicate that dysfunction of the sympathetic preganglionic neurons exists in a patient of severe sepsis and cardiac dysfunction with anorexia nervosa.
Collapse
Affiliation(s)
- Miyuki Kinebuchi
- Department of Molecular Pathology Graduate School of Medicine Fujita Health University Toyoake Aichi Japan
| | - Akihiro Matsuura
- Department of Molecular Pathology Graduate School of Medicine Fujita Health University Toyoake Aichi Japan
| |
Collapse
|
17
|
Huang HM, Chen HL, Gibson GE. Interactions of endoplasmic reticulum and mitochondria Ca(2+) stores with capacitative calcium entry. Metab Brain Dis 2014; 29:1083-93. [PMID: 24748364 PMCID: PMC4206688 DOI: 10.1007/s11011-014-9541-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Accepted: 03/28/2014] [Indexed: 11/30/2022]
Abstract
Thiamine dependent enzymes are diminished in Alzheimer's disease (AD). Thiamine deficiency in vitro and in rodents is a useful model of this reduction. Thiamine interacts with cellular calcium stores. To directly test the relevance of the thiamine dependent changes to dynamic processes in AD, the interactions must be studied in cells from patients with AD. These studies employed fibroblasts. Mitochondrial dysfunction including reductions in thiamine dependent enzymes and abnormalities in calcium homeostasis and oxidative processes occur in fibroblasts from Alzheimer's Disease (AD) patients. Bombesin-releasable calcium stores (BRCS) from the endoplasmic reticulum (ER) are exaggerated in fibroblasts from patients with AD bearing a presenilin-1 (PS-1) mutation and in control fibroblasts treated with oxidants. ER calcium regulates calcium entry into the cell through capacitative calcium entry (CCE), which is reduced in fibroblasts and neurons from mice bearing PS-1 mutations. Under physiological conditions, mitochondria and ER play important and interactive roles in the regulation of Ca(2+) homeostasis. Thus, the interactions of mitochondria and oxidants with CCE were tested. Inhibition of ER Ca(2+)-ATPase by cyclopiazonic acid (CPA) stimulates CCE. CPA-induced CCE was diminished by inhibition of mitochondrial Ca(2+) export (-60%) or import (-40%). Different aspects of mitochondrial Ca(2+) coupled to CPA-induced-CCE were sensitive to select oxidants. The effects were very different when CCE was examined in the presence of InsP3, a physiological regulator of ER calcium release, and subsequent CCE. CCE under these conditions was only mildly reduced (20-25%) by inhibition of mitochondrial Ca(2+) export, and inhibition of mitochondrial Ca(2+) uptake exaggerated CCE (+53%). However, t-BHP reversed both abnormalities. The results suggest that in the presence of InsP3, mitochondria buffer the local Ca(2+) released from ER following rapid activation of InsP3R and serve as a negative feedback to the CCE. The results suggest that mitochondrial Ca(2+) modifies the depletion and refilling mechanism of ER Ca(2+) stores.
Collapse
Affiliation(s)
- Hsueh-Meei Huang
- Brain Mind Research Institute, Burke Medical Research Institute, Weill Medical College of Cornell University, 785 Mamaroneck Ave, White Plains, NY, 10605, USA
| | | | | |
Collapse
|
18
|
Manzetti S, Zhang J, van der Spoel D. Thiamin Function, Metabolism, Uptake, and Transport. Biochemistry 2014; 53:821-35. [DOI: 10.1021/bi401618y] [Citation(s) in RCA: 186] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Sergio Manzetti
- Uppsala
Center for Computational Chemistry, Science for Life Laboratory, Department
for Cell and Molecular Biology, University of Uppsala, Box 596, 751
24 Uppsala, Sweden
- Fjordforsk A.S., Fresvik 6896, Norway
| | - Jin Zhang
- Uppsala
Center for Computational Chemistry, Science for Life Laboratory, Department
for Cell and Molecular Biology, University of Uppsala, Box 596, 751
24 Uppsala, Sweden
- Department
of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - David van der Spoel
- Uppsala
Center for Computational Chemistry, Science for Life Laboratory, Department
for Cell and Molecular Biology, University of Uppsala, Box 596, 751
24 Uppsala, Sweden
| |
Collapse
|
19
|
Zarros A, Liapi C, Al-Humadi H, Almpani M, Stolakis V, Skandali N, Voumvourakis K, Katsouni E, Tsakiris S. Experimentally-induced Wernicke's encephalopathy modifies crucial rat brain parameters: the importance of Na+, K+ -ATPase and a potentially neuroprotective role for antioxidant supplementation. Metab Brain Dis 2013; 28:387-96. [PMID: 23475222 DOI: 10.1007/s11011-013-9394-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2013] [Accepted: 02/26/2013] [Indexed: 10/27/2022]
Abstract
Wernicke's encephalopathy (WE) is a serious neuropsychiatric syndrome caused by chronic alcoholism and thiamine (T) deficiency. Our aim was to shed more light on the pathophysiology of WE, by introducing a modified in vivo experimental model of WE and by focusing on changes provoked in the total antioxidant status (TAS) and three crucial brain enzyme activities in adult rats. Rats were placed on ethanol (EtOH) consumption (20 % v/v) for a total of 5 weeks. By the end of the third week, rats were fed a T-deficient diet (TDD) and were treated with pyrithiamine (PT; 0.25 mg/kg) for the remaining 2 weeks. Following the induction of WE symptomatology, rats were treated with three consecutive (every 8 h) injections of saline or T (100 mg/kg) and were sacrificed. Brain homogenates were generated and used for spectrophotometrical evaluation of TAS and enzymatic activities. Additionally, in vitro experiments were conducted on brain homogenates or pure enzymes incubated with T or neuromodulatory antioxidants. Pre-exposure to EtOH provided a successful protocol modification that did not affect the expected time of WE symptomatology onset. Administration of T ameliorated this symptomatology. WE provoked oxidative stress that was partially limited by T administration, while T itself also caused oxidative stress to a smaller extent. Brain acetylcholinesterase (AChE) was found inhibited by WE and was further inhibited by T administration. In vitro experiments demonstrated a potential neuroprotective role for L-carnitine (Carn). Brain sodium-potassium adenosine triphosphatase (Na(+),K(+)-ATPase) activity was found increased in WE and was reduced to control levels by in vivo T administration; this increase was also evident in groups exposed to PT or to TDD, but not to EtOH. In vitro experiments demonstrated a potential neuroprotective role for this Na(+),K(+)-ATPase stimulation through T or L-cysteine (Cys) administration. Brain magnesium adenosine triphosphatase (Mg(2+)-ATPase) activity was found decreased by prolonged exposure to EtOH, but was not affected by the experimental induction of WE. Our data suggest that T administration inhibits AChE, which is also found inhibited in WE. Moreover, increased brain Na(+),K(+)-ATPase activity could be a marker of T deficiency in WE, while combined T and antioxidant co-supplementation of Cys and/or Carn could be neuroprotective in terms of restoring the examined crucial brain enzyme activities to control levels.
Collapse
Affiliation(s)
- Apostolos Zarros
- Laboratory of Physiology, Medical School, National and Kapodistrian University of Athens, PO Box 65257, 15401, Athens, Greece
| | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Gibson GE, Chen HL, Xu H, Qiu L, Xu Z, Denton TT, Shi Q. Deficits in the mitochondrial enzyme α-ketoglutarate dehydrogenase lead to Alzheimer's disease-like calcium dysregulation. Neurobiol Aging 2012; 33:1121.e13-24. [PMID: 22169199 PMCID: PMC3321099 DOI: 10.1016/j.neurobiolaging.2011.11.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Revised: 10/27/2011] [Accepted: 11/03/2011] [Indexed: 01/08/2023]
Abstract
Understanding the molecular sequence of events that culminate in multiple abnormalities in brains from patients that died with Alzheimer's disease (AD) will help to reveal the mechanisms of the disease and identify upstream events as therapeutic targets. The activity of the mitochondrial α-ketoglutarate dehydrogenase complex (KGDHC) in homogenates from autopsy brain declines with AD. Experimental reductions in KGDHC in mouse models of AD promote plaque and tangle formation, the hallmark pathologies of AD. We hypothesize that deficits in KGDHC also lead to the abnormalities in endoplasmic reticulum (ER) calcium stores and cytosolic calcium following K(+) depolarization that occurs in cells from AD patients and transgenic models of AD. The activity of the mitochondrial enzyme KGDHC was diminished acutely (minutes), long-term (days), or chronically (weeks). Acute inhibition of KGDHC produced effects on calcium opposite to those in AD, while the chronic or long-term inhibition of KGDHC mimicked the AD-related changes in calcium. Divergent changes in proteins released from the mitochondria that affect endoplasmic reticulum calcium channels may underlie the selective cellular consequences of acute versus longer term inhibition of KGDHC. The results suggest that the mitochondrial abnormalities in AD can be upstream of those in calcium.
Collapse
Affiliation(s)
- Gary E Gibson
- Department of Neurology and Neuroscience, Weill Cornell Medical College, Burke Medical Research Institute, White Plains, NY 10605, USA.
| | | | | | | | | | | | | |
Collapse
|
21
|
Lee S, Yang G, Yong Y, Liu Y, Zhao L, Xu J, Zhang X, Wan Y, Feng C, Fan Z, Liu Y, Luo J, Ke ZJ. ADAR2-dependent RNA editing of GluR2 is involved in thiamine deficiency-induced alteration of calcium dynamics. Mol Neurodegener 2010; 5:54. [PMID: 21110885 PMCID: PMC3006372 DOI: 10.1186/1750-1326-5-54] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Accepted: 11/27/2010] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Thiamine (vitamin B1) deficiency (TD) causes mild impairment of oxidative metabolism and region-selective neuronal loss in the central nervous system (CNS). TD in animals has been used to model aging-associated neurodegeneration in the brain. The mechanisms of TD-induced neuron death are complex, and it is likely multiple mechanisms interplay and contribute to the action of TD. In this study, we demonstrated that TD significantly increased intracellular calcium concentrations [Ca2+]i in cultured cortical neurons. RESULTS TD drastically potentiated AMPA-triggered calcium influx and inhibited pre-mRNA editing of GluR2, a Ca2+-permeable subtype of AMPA receptors. The Ca2+ permeability of GluR2 is regulated by RNA editing at the Q/R site. Edited GluR2 (R) subunits form Ca2+-impermeable channels, whereas unedited GluR2 (Q) channels are permeable to Ca2+ flow. TD inhibited Q/R editing of GluR2 and increased the ratio of unedited GluR2. The Q/R editing of GluR2 is mediated by adenosine deaminase acting on RNA 2 (ADAR2). TD selectively decreased ADAR2 expression and its self-editing ability without affecting ADAR1 in cultured neurons and in the brain tissue. Over-expression of ADAR2 reduced AMPA-mediated rise of [Ca2+]i and protected cortical neurons against TD-induced cytotoxicity, whereas down-regulation of ADAR2 increased AMPA-elicited Ca2+ influx and exacerbated TD-induced death of cortical neurons. CONCLUSIONS Our findings suggest that TD-induced neuronal damage may be mediated by the modulation of ADAR2-dependent RNA Editing of GluR2.
Collapse
Affiliation(s)
- Shuchen Lee
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Guang Yang
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Yue Yong
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Ying Liu
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Liyun Zhao
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Jing Xu
- Department of Anesthesiology, Gongli Hospital, Pudong, Shanghai, China
| | - Xiaomin Zhang
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Yanjie Wan
- Department of Anesthesiology, Gongli Hospital, Pudong, Shanghai, China
| | - Chun Feng
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Zhiqin Fan
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Yong Liu
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Jia Luo
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
- Department of Internal Medicine, University of Kentucky College of Medicine, 130 Bosomworth Health Science Research Building, 1095 Veterans Drive, Lexington, Kentucky 40536, USA
| | - Zun-Ji Ke
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| |
Collapse
|