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Kareem O, Nisar S, Tanvir M, Muzaffer U, Bader GN. Thiamine deficiency in pregnancy and lactation: implications and present perspectives. Front Nutr 2023; 10:1080611. [PMID: 37153911 PMCID: PMC10158844 DOI: 10.3389/fnut.2023.1080611] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 04/03/2023] [Indexed: 05/10/2023] Open
Abstract
During pregnancy, many physiologic changes occur in order to accommodate fetal growth. These changes require an increase in many of the nutritional needs to prevent long-term consequences for both mother and the offspring. One of the main vitamins that are needed throughout the pregnancy is thiamine (vitamin B1) which is a water-soluble vitamin that plays an important role in many metabolic and physiologic processes in the human body. Thiamine deficiency during pregnancy can cause can have many cardiac, neurologic, and psychological effects on the mother. It can also dispose the fetus to gastrointestinal, pulmonological, cardiac, and neurologic conditions. This paper reviews the recently published literature about thiamine and its physiologic roles, thiamine deficiency in pregnancy, its prevalence, its impact on infants and subsequent consequences in them. This review also highlights the knowledge gaps within these topics.
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Affiliation(s)
- Ozaifa Kareem
- Department of Pharmaceutical Sciences, University of Kashmir, Srinagar, India
- *Correspondence: Ozaifa Kareem, ,
| | - Sobia Nisar
- Department of Medicine, Government Medical College, Srinagar, India
| | - Masood Tanvir
- Department of Medicine, Government Medical College, Srinagar, India
| | - Umar Muzaffer
- Department of Medicine, Government Medical College, Srinagar, India
| | - G. N. Bader
- Department of Pharmaceutical Sciences, University of Kashmir, Srinagar, India
- G. N. Bader,
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Kim J, Oh EK, Kim EJ, Lee JK. Photoautotrophic Growth Rate Enhancement of Synechocystis sp. PCC6803 by Heterologous Production of 2-Oxoglutarate:Ferredoxin Oxidoreductase from Chlorobaculum tepidum. BIOLOGY 2022; 12:biology12010059. [PMID: 36671751 PMCID: PMC9855186 DOI: 10.3390/biology12010059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/27/2022] [Accepted: 12/27/2022] [Indexed: 01/01/2023]
Abstract
2-Oxoglutarate:ferredoxin oxidoreductase from Chlorobaculum tepidum (CtOGOR) is a carbon-fixing enzyme in the reductive TCA cycle that reversibly carboxylates succinyl-CoA to yield 2-oxoglutarate. CtOGOR is a heterotetramer of two large (α = 68 kDa) and two small (β = 38 kDa) subunits. The αβ protomer harbors one thiamine pyrophosphate and two 4Fe-4S clusters. Nonetheless, the enzyme has a considerable oxygen tolerance with a half-life of 143 min at 215 μM dissolved oxygen. Kinetic analyses of the purified recombinant CtOGOR revealed a lower Km for succinyl-CoA than for 2-oxoglutarate. Cellular levels of 2-oxoglutarate and glutamate—a product of glutamine oxoglutarate aminotransferase and glutamate dehydrogenase—increased more than twofold in the exponential phase compared with the control strain, leading to an approximately >30% increase in the photoautotrophic growth rate. Thus, CtOGOR was successfully produced in Synechocystis, thereby boosting carboxylation, resulting in enhanced photoautotrophic growth.
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Affiliation(s)
- June Kim
- Department of Life Science, Sogang University, Seoul 121-742, Republic of Korea
| | - Eun Kyoung Oh
- Department of Life Science, Sogang University, Seoul 121-742, Republic of Korea
| | - Eui-Jin Kim
- Microbial Research Department, Nakdonggang National Institute of Biological Resources, Sangju 37242, Republic of Korea
- Correspondence: (E.-J.K.); (J.K.L.); Tel.: +82-54-530-0860 (E.-J.K.); +82-2-705-8459 (J.K.L.); Fax: +82-54-530-0869 (E.-J.K.); +82-2-704-3601 (J.K.L.)
| | - Jeong K. Lee
- Department of Life Science, Sogang University, Seoul 121-742, Republic of Korea
- Correspondence: (E.-J.K.); (J.K.L.); Tel.: +82-54-530-0860 (E.-J.K.); +82-2-705-8459 (J.K.L.); Fax: +82-54-530-0869 (E.-J.K.); +82-2-704-3601 (J.K.L.)
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Joshi J, Mimura M, Suzuki M, Wu S, Gregory JF, Hanson AD, McCarty DR. The Thiamin-Requiring 3 Mutation of Arabidopsis 5-Deoxyxylulose-Phosphate Synthase 1 Highlights How the Thiamin Economy Impacts the Methylerythritol 4-Phosphate Pathway. FRONTIERS IN PLANT SCIENCE 2021; 12:721391. [PMID: 34421975 PMCID: PMC8377734 DOI: 10.3389/fpls.2021.721391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 07/14/2021] [Indexed: 06/01/2023]
Abstract
The thiamin-requiring mutants of Arabidopsis have a storied history as a foundational model for biochemical genetics in plants and have illuminated the central role of thiamin in metabolism. Recent integrative genetic and biochemical analyses of thiamin biosynthesis and utilization imply that leaf metabolism normally operates close to thiamin-limiting conditions. Thus, the mechanisms that allocate thiamin-diphosphate (ThDP) cofactor among the diverse thiamin-dependent enzymes localized in plastids, mitochondria, peroxisomes, and the cytosol comprise an intricate thiamin economy. Here, we show that the classical thiamin-requiring 3 (th3) mutant is a point mutation in plastid localized 5-deoxyxylulose synthase 1 (DXS1), a key regulated enzyme in the methylerythritol 4-phosphate (MEP) isoprene biosynthesis pathway. Substitution of a lysine for a highly conserved glutamate residue (E323) located at the subunit interface of the homodimeric enzyme conditions a hypomorphic phenotype that can be rescued by supplying low concentrations of thiamin in the medium. Analysis of leaf thiamin vitamers showed that supplementing the medium with thiamin increased total ThDP content in both wild type and th3 mutant plants, supporting a hypothesis that the mutant DXS1 enzyme has a reduced affinity for the ThDP cofactor. An unexpected upregulation of a suite of biotic-stress-response genes associated with accumulation of downstream MEP intermediate MEcPP suggests that th3 causes mis-regulation of DXS1 activity in thiamin-supplemented plants. Overall, these results highlight that the central role of ThDP availability in regulation of DXS1 activity and flux through the MEP pathway.
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Affiliation(s)
- Jaya Joshi
- Department of Horticultural Sciences, University of Florida, Gainesville, FL, United States
| | - Manaki Mimura
- Plant Cytogenetics, Department of Gene Function and Phenomics, National Institute of Genetics, Mishima, Japan
| | - Masaharu Suzuki
- Department of Horticultural Sciences, University of Florida, Gainesville, FL, United States
| | - Shan Wu
- Department of Horticultural Sciences, University of Florida, Gainesville, FL, United States
| | - Jesse F. Gregory
- Department Food Science and Human Nutrition, University of Florida, Gainesville, FL, United States
| | - Andrew D. Hanson
- Department of Horticultural Sciences, University of Florida, Gainesville, FL, United States
| | - Donald R. McCarty
- Department of Horticultural Sciences, University of Florida, Gainesville, FL, United States
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Zhang S, Qiao Y, Wang Z, Zhuang J, Sun Y, Shang X, Li G. Identification of novel compound heterozygous variants in SLC19A2 and the genotype-phenotype associations in thiamine-responsive megaloblastic anemia. Clin Chim Acta 2021; 516:157-168. [PMID: 33571483 DOI: 10.1016/j.cca.2021.01.025] [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: 05/14/2020] [Revised: 01/24/2021] [Accepted: 01/28/2021] [Indexed: 01/19/2023]
Abstract
BACKGROUND AND AIMS Thiamine-responsive megaloblastic anemia (TRMA), caused by SLC19A2 loss-of-function variants, is characterized by the triad of megaloblastic anemia, progressive sensorineural deafness, and non-type 1 diabetes mellitus. Here, we present the case of a Chinese infant with two novel variants segregating in compound heterozygous form in SLC19A2 and reviewed genotype-phenotype associations (GPAs) in patients with TRMA. MATERIALS AND METHODS Whole-exome sequencing was performed to establish a genetic diagnosis. The clinical manifestations and genetic variants were collected by performing a literature review. The bioinformatics software SIFT, PolyPhen2, and Mutation Taster was applied to predict variant effects and analyze GPAs. RESULTS Two novel variants segregating in compound heterozygous form in SLC19A2 (NM_006996.2: exon2:c.336_363del:p.W112fs; exon2:c.358G>T:p.G120X) was identified. Thiamine supplementation corrected anemia and diabetes mellitus but did not improve the hearing defect. In the literature, 183 patients with TRMA with 74 variants in SLC19A2 have been reported, with high incidence in the Middle East, South Asia, and the northern Mediterranean. Patients with biallelic premature termination codon variants presented with more severe phenotypes, and truncating sites on extracellular domains was a protective factor for the hemoglobin level at diagnosis. CONCLUSION Two novel compound heterozygous variants (NM_006996.2: exon2:c.336_363del:p.W112fs; exon2:c.358G>T:p.G120X) were identified, and GPAs in TRMA indicated the predictability of clinical manifestations.
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Affiliation(s)
- Shule Zhang
- Department of Pediatric Endocrinology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 9677 Jingshi Road, Lixia Area, Jinan, Shandong 250021, China.
| | - Yu Qiao
- Department of Pediatric Endocrinology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 9677 Jingshi Road, Lixia Area, Jinan, Shandong 250021, China; Department of Pediatric Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 9677 Jingshi Road, Lixia Area, Jinan, Shandong 250021, China.
| | - Zengmin Wang
- Department of Pediatric Endocrinology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 9677 Jingshi Road, Lixia Area, Jinan, Shandong 250021, China; Department of Pediatric Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 9677 Jingshi Road, Lixia Area, Jinan, Shandong 250021, China.
| | - Jianxin Zhuang
- Department of Pediatric Endocrinology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 9677 Jingshi Road, Lixia Area, Jinan, Shandong 250021, China; Department of Pediatric Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 9677 Jingshi Road, Lixia Area, Jinan, Shandong 250021, China.
| | - Yan Sun
- Department of Pediatric Endocrinology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 9677 Jingshi Road, Lixia Area, Jinan, Shandong 250021, China; Department of Pediatric Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 9677 Jingshi Road, Lixia Area, Jinan, Shandong 250021, China.
| | - Xiaohong Shang
- Department of Pediatric Endocrinology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 9677 Jingshi Road, Lixia Area, Jinan, Shandong 250021, China; Department of Pediatric Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 9677 Jingshi Road, Lixia Area, Jinan, Shandong 250021, China.
| | - Guimei Li
- Department of Pediatric Endocrinology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 9677 Jingshi Road, Lixia Area, Jinan, Shandong 250021, China; Department of Pediatric Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 9677 Jingshi Road, Lixia Area, Jinan, Shandong 250021, China.
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Van Veldhoven PP, de Schryver E, Young SG, Zwijsen A, Fransen M, Espeel M, Baes M, Van Ael E. Slc25a17 Gene Trapped Mice: PMP34 Plays a Role in the Peroxisomal Degradation of Phytanic and Pristanic Acid. Front Cell Dev Biol 2020; 8:144. [PMID: 32266253 PMCID: PMC7106852 DOI: 10.3389/fcell.2020.00144] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 02/20/2020] [Indexed: 12/04/2022] Open
Abstract
Mice lacking PMP34, a peroxisomal membrane transporter encoded by Slc25a17, did not manifest any obvious phenotype on a Swiss Webster genetic background, even with various treatments designed to unmask impaired peroxisomal functioning. Peroxisomal α- and β-oxidation rates in PMP34 deficient fibroblasts or liver slices were not or only modestly affected and in bile, no abnormal bile acid intermediates were detected. Peroxisomal content of cofactors like CoA, ATP, NAD+, thiamine-pyrophosphate and pyridoxal-phosphate, based on direct or indirect data, appeared normal as were tissue plasmalogen and very long chain fatty acid levels. However, upon dietary phytol administration, the knockout mice displayed hepatomegaly, liver inflammation, and an induction of peroxisomal enzymes. This phenotype was partially mediated by PPARα. Hepatic triacylglycerols and cholesterylesters were elevated and both phytanic acid and pristanic acid accumulated in the liver lipids, in females to higher extent than in males. In addition, pristanic acid degradation products were detected, as wells as the CoA-esters of all these branched fatty acids. Hence, PMP34 is important for the degradation of phytanic/pristanic acid and/or export of their metabolites. Whether this is caused by a shortage of peroxisomal CoA affecting the intraperoxisomal formation of pristanoyl-CoA (and perhaps of phytanoyl-CoA), or the SCPx-catalyzed thiolytic cleavage during pristanic acid β-oxidation, could not be proven in this model, but the phytol-derived acyl-CoA profile is compatible with the latter possibility. On the other hand, the normal functioning of other peroxisomal pathways, and especially bile acid formation, seems to exclude severe transport problems or a shortage of CoA, and other cofactors like FAD, NAD(P)+, TPP. Based on our findings, PMP34 deficiency in humans is unlikely to be a life threatening condition but could cause elevated phytanic/pristanic acid levels in older adults.
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Affiliation(s)
| | - Evelyn de Schryver
- LIPIT, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Stephen G. Young
- Departments of Medicine and Human Genetics, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - An Zwijsen
- Laboratory of Developmental Signaling, Department Human Genetics, VIB-KU Leuven, Leuven, Belgium
| | - Marc Fransen
- LIPIT, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Marc Espeel
- Department of Anatomy, Embryology, Histology and Medical Physics, Ghent University, Ghent, Belgium
| | - Myriam Baes
- Laboratory of Cell Metabolism, Faculty of Pharmaceutical Sciences, KU Leuven, Leuven, Belgium
| | - Elke Van Ael
- LIPIT, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
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Aleshin VA, Mkrtchyan GV, Bunik VI. Mechanisms of Non-coenzyme Action of Thiamine: Protein Targets and Medical Significance. BIOCHEMISTRY (MOSCOW) 2019; 84:829-850. [PMID: 31522667 DOI: 10.1134/s0006297919080017] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Thiamine (vitamin B1) is a precursor of the well-known coenzyme of central metabolic pathways thiamine diphosphate (ThDP). Highly intense glucose oxidation in the brain requires ThDP-dependent enzymes, which determines the critical significance of thiamine for neuronal functions. However, thiamine can also act through the non-coenzyme mechanisms. The well-known facilitation of acetylcholinergic neurotransmission upon the thiamine and acetylcholine co-release into the synaptic cleft has been supported by the discovery of thiamine triphosphate (ThTP)-dependent phosphorylation of the acetylcholine receptor-associated protein rapsyn, and thiamine interaction with the TAS2R1 receptor, resulting in the activation of synaptic ion currents. The non-coenzyme regulatory binding of thiamine compounds has been demonstrated for the transcriptional regulator p53, poly(ADP-ribose) polymerase, prion protein PRNP, and a number of key metabolic enzymes that do not use ThDP as a coenzyme. The accumulated data indicate that the molecular mechanisms of the neurotropic action of thiamine are far broader than it has been originally believed, and closely linked to the metabolism of thiamine and its derivatives in animals. The significance of this topic has been illustrated by the recently established competition between thiamine and the antidiabetic drug metformin for common transporters, which can be the reason for the thiamine deficiency underlying metformin side effects. Here, we also discuss the medical implications of the research on thiamine, including the role of thiaminases in thiamine reutilization and biosynthesis of thiamine antagonists; molecular mechanisms of action of natural and synthetic thiamine antagonists, and biotransformation of pharmacological forms of thiamine. Given the wide medical application of thiamine and its synthetic forms, these aspects are of high importance for medicine and pharmacology, including the therapy of neurodegenerative diseases.
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Affiliation(s)
- V A Aleshin
- Lomonosov Moscow State University, Faculty of Bioengineering and Bioinformatics, Moscow, 119991, Russia.,Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 19991 Moscow, Russia
| | - G V Mkrtchyan
- Lomonosov Moscow State University, Faculty of Bioengineering and Bioinformatics, Moscow, 119991, Russia
| | - V I Bunik
- Lomonosov Moscow State University, Faculty of Bioengineering and Bioinformatics, Moscow, 119991, Russia. .,Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 19991 Moscow, Russia
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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.
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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
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Gralak MA, Dębski B, Drywień M. Thiamine deficiency affects glucose transport and β-oxidation in rats. J Anim Physiol Anim Nutr (Berl) 2019; 103:1629-1635. [PMID: 31259440 PMCID: PMC6851678 DOI: 10.1111/jpn.13146] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 04/07/2019] [Accepted: 06/03/2019] [Indexed: 12/13/2022]
Abstract
Thiamine is recognized as a cofactor for many enzymes involved in intermediary metabolism responsible for energy production. Animal model of thiamine deficiency (TD) included direct evaluation of glucose uptake by estimation of 3H‐deoxyglucose transport across red blood cells membranes and β‐oxidation of fatty acids in isolated leucocytes. Feeding of animals with the thiamine‐deficient diet (0.018 mg/kg diet) for 30 days resulted in disturbances in energy production. The thiamine intake was limited not only by vitamin B1 deficiency in the diet, but also by time‐dependent drop of feed consumption by rats fed this diet. At the end of experiment, diet consumption in this group of rats was 52% lower than in the control group. This was accompanied by low glucose uptake by erythrocytes of rats suffering vitamin B1 deficiency for longer time. At the end of experimental period, glucose uptake was over 2 times lower in TD erythrocytes than in control RBC. Such drop of energy production was not compensated by delivery of energy from fatty acid degradation. In leucocytes from TD rats, the β‐oxidation was also suppressed. Observed significant decrease of serum insulin from 2.25 ± 0.25 ng/ml (day 0) to 1.94 ± 0.17 ng/ml (day 30) might have significant impact on observed energy production disorders. The results from this study indicate that the thiamine deficiency significantly reduces feed intake and causes modest abnormalities in glucose and fatty acid utilization.
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Affiliation(s)
- Mikołaj Antoni Gralak
- Department of Physiological Sciences, Faculty of Veterinary Medicine, Warsaw University of Life Sciences-SGGW, Warsaw, Poland
| | - Bogdan Dębski
- Department of Physiological Sciences, Faculty of Veterinary Medicine, Warsaw University of Life Sciences-SGGW, Warsaw, Poland
| | - Małgorzata Drywień
- Department of Human Nutrition, Faculty of Human Nutrition and Consumer Sciences, Warsaw University of Life Sciences-SGGW, Warsaw, Poland
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Qin Z, Xiang C, Zhong F, Liu Y, Dong Q, Li K, Shi W, Ding C, Qin L, He F. Transketolase (TKT) activity and nuclear localization promote hepatocellular carcinoma in a metabolic and a non-metabolic manner. J Exp Clin Cancer Res 2019; 38:154. [PMID: 30971297 PMCID: PMC6458711 DOI: 10.1186/s13046-019-1131-1] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 03/08/2019] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Metabolic reprogramming is one of the hallmarks of cancer cells. The pentose phosphate pathway (PPP), a branch of glycolysis, is an important metabolic pathway for the survival and biosynthesis of cancer cells. Transketolase (TKT) is a key enzyme in the non-oxidative phase of PPP. The mechanistic details of TKT in hepatocellular carcinoma (HCC) development remain unclear. METHODS TKT level and subcellular location were examined in HCC cell lines and tissue samples. We established the TKT overexpression and knocking-down stable cells in HCC cell lines. Proliferation, migration, viability and enzyme activity assays in vitro, tumor growth and metastasis assays in vivo were employed to test the effects of TKT on HCC development. GFP-tagged TKT truncations and mutants were used to locate the nuclear localization sequence (NLSs) of TKT. Cross-linking co-IP/MS was applied to identify the interaction proteins of nuclear TKT. RESULTS We showed that TKT increased the proliferation and migration of HCC cells, as well as the viability under oxidative stress in vitro and accelerated the growth and metastasis of HCC cells in vivo. We found as a key enzyme of PPP, TKT could promote the proliferation, cell cycle, migration and viability by regulating the metabolic flux. Moreover, it was firstly reported that unlike other key enzymes in PPP, TKT showed a strong nuclear localization in HCC cells. We found not only high TKT expression, but also its nuclear localization was a prediction for poor prognosis of HCC patients. We further identified the nuclear localization sequences (NLS) for TKT and demonstrated the NLS mutations decreased the pro-tumor function of TKT independent of the enzyme activity. Cross-linking Co-IP/MS showed that nuclear TKT interacted with kinases and transcriptional coregulators such as EGFR and MAPK3, which are associated with cell activation or stress response processes. EGF treatment significantly increased the viability and proliferation of HCC cells in the enzyme-inactivating mutation TKT-D155A overexpression cells but not in the NLS-D155A double mutant group, which could be blocked by EGFR inhibitor erlotinib treatment. CONCLUSIONS Our research suggests that in addition to the metabolic manner, TKT can promote the development of HCC in a non-metabolic manner via its nuclear localization and EGFR pathway.
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Affiliation(s)
- Zhaoyu Qin
- Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032 China
| | - Chan Xiang
- Department of Pathology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, 200030 China
| | - Fan Zhong
- Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032 China
| | - Yang Liu
- Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032 China
| | - Qiongzhu Dong
- Department of Surgery, Huashan Hospital, Cancer Metastasis Institute, Fudan University, Shanghai, 200040 China
| | - Kai Li
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing, 102206 China
| | - Wenhao Shi
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing, 102206 China
| | - Chen Ding
- Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032 China
| | - Lunxiu Qin
- Department of Surgery, Huashan Hospital, Cancer Metastasis Institute, Fudan University, Shanghai, 200040 China
| | - Fuchu He
- Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032 China
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing, 102206 China
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Dhir S, Tarasenko M, Napoli E, Giulivi C. Neurological, Psychiatric, and Biochemical Aspects of Thiamine Deficiency in Children and Adults. Front Psychiatry 2019; 10:207. [PMID: 31019473 PMCID: PMC6459027 DOI: 10.3389/fpsyt.2019.00207] [Citation(s) in RCA: 107] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 03/22/2019] [Indexed: 01/19/2023] Open
Abstract
Thiamine (vitamin B1) is an essential nutrient that serves as a cofactor for a number of enzymes, mostly with mitochondrial localization. Some thiamine-dependent enzymes are involved in energy metabolism and biosynthesis of nucleic acids whereas others are part of the antioxidant machinery. The brain is highly vulnerable to thiamine deficiency due to its heavy reliance on mitochondrial ATP production. This is more evident during rapid growth (i.e., perinatal periods and children) in which thiamine deficiency is commonly associated with either malnutrition or genetic defects. Thiamine deficiency contributes to a number of conditions spanning from mild neurological and psychiatric symptoms (confusion, reduced memory, and sleep disturbances) to severe encephalopathy, ataxia, congestive heart failure, muscle atrophy, and even death. This review discusses the current knowledge on thiamine deficiency and associated morbidity of neurological and psychiatric disorders, with special emphasis on the pediatric population, as well as the putative beneficial effect of thiamine supplementation in autism spectrum disorder (ASD) and other neurological conditions.
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Affiliation(s)
- Shibani Dhir
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - Maya Tarasenko
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - Eleonora Napoli
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - Cecilia Giulivi
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
- Medical Investigations of Neurodevelopmental Disorders (MIND) Institute, University of California, Davis, Davis, CA, United States
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Daygon VD, Calingacion M, Forster LC, Voss JJD, Schwartz BD, Ovenden B, Alonso DE, McCouch SR, Garson MJ, Fitzgerald MA. Metabolomics and genomics combine to unravel the pathway for the presence of fragrance in rice. Sci Rep 2017; 7:8767. [PMID: 28821745 PMCID: PMC5562744 DOI: 10.1038/s41598-017-07693-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 06/27/2017] [Indexed: 11/26/2022] Open
Abstract
Since it was first characterised in 1983, 2-acetyl-1-pyrroline (2AP) has been considered to be the most important aroma compound in rice. In this study, we show four other amine heterocycles: 6-methyl, 5-oxo-2,3,4,5-tetrahydropyridine (6M5OTP), 2-acetylpyrrole, pyrrole and 1-pyrroline, that correlate strongly with the production of 2AP, and are present in consistent proportions in a set of elite aromatic rice varieties from South East Asia and Australia as well as in a collection of recombinant inbred lines (RILs) derived from indica Jasmine-type varieties, Australian long grain varieties (temperate japonica) and Basmati-type rice (Grp V). These compounds were detected through untargeted metabolite profiling by two-dimensional gas chromatography-time-of-flight mass spectrometry (GC × GC-TOF-MS), and their identity were confirmed by comparison with authentic standards analysed using gas chromatography mass spectrometry (GC-MS) and High Resolution GC × GC-TOF-MS (GC × GC HRT-4D). Genome-wide association analysis indicates that all compounds co-localised with a single quantitative trait locus (QTL) that harbours the FGR gene responsible for the production of GABA. Together, these data provide new insights into the production of 2AP, and evidence for understanding the pathway leading to the accumulation of aroma in fragrant rice.
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Affiliation(s)
- Venea Dara Daygon
- School of Agriculture and Food Sciences, The University of Queensland, St Lucia, QLD, 4072, Australia
| | - Mariafe Calingacion
- School of Agriculture and Food Sciences, The University of Queensland, St Lucia, QLD, 4072, Australia
| | - Louise C Forster
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD, 4072, Australia
| | - James J De Voss
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD, 4072, Australia
| | - Brett D Schwartz
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD, 4072, Australia
| | - Ben Ovenden
- NSW Department of Primary Industries, Yanco Agricultural Institute, Yanco, NSW, 2703, Australia
| | - David E Alonso
- LECO Corporation Life Science and Chemical Analysis Centre, 1850 Hilltop Rd, Saint Joseph, MI, 49085, USA
| | - Susan R McCouch
- Department of Plant Breeding & Genetics, Cornell University, Ithaca, NY, 14853, USA
| | - Mary J Garson
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD, 4072, Australia
| | - Melissa A Fitzgerald
- School of Agriculture and Food Sciences, The University of Queensland, St Lucia, QLD, 4072, Australia.
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Mimura M, Zallot R, Niehaus TD, Hasnain G, Gidda SK, Nguyen TND, Anderson EM, Mullen RT, Brown G, Yakunin AF, de Crécy-Lagard V, Gregory JF, McCarty DR, Hanson AD. Arabidopsis TH2 Encodes the Orphan Enzyme Thiamin Monophosphate Phosphatase. THE PLANT CELL 2016; 28:2683-2696. [PMID: 27677881 PMCID: PMC5134987 DOI: 10.1105/tpc.16.00600] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 09/20/2016] [Accepted: 09/26/2016] [Indexed: 05/18/2023]
Abstract
To synthesize the cofactor thiamin diphosphate (ThDP), plants must first hydrolyze thiamin monophosphate (ThMP) to thiamin, but dedicated enzymes for this hydrolysis step were unknown and widely doubted to exist. The classical thiamin-requiring th2-1 mutation in Arabidopsis thaliana was shown to reduce ThDP levels by half and to increase ThMP levels 5-fold, implying that the THIAMIN REQUIRING2 (TH2) gene product could be a dedicated ThMP phosphatase. Genomic and transcriptomic data indicated that TH2 corresponds to At5g32470, encoding a HAD (haloacid dehalogenase) family phosphatase fused to a TenA (thiamin salvage) family protein. Like the th2-1 mutant, an insertional mutant of At5g32470 accumulated ThMP, and the thiamin requirement of the th2-1 mutant was complemented by wild-type At5g32470 Complementation tests in Escherichia coli and enzyme assays with recombinant proteins confirmed that At5g32470 and its maize (Zea mays) orthologs GRMZM2G148896 and GRMZM2G078283 are ThMP-selective phosphatases whose activity resides in the HAD domain and that the At5g32470 TenA domain has the expected thiamin salvage activity. In vitro and in vivo experiments showed that alternative translation start sites direct the At5g32470 protein to the cytosol and potentially also to mitochondria. Our findings establish that plants have a dedicated ThMP phosphatase and indicate that modest (50%) ThDP depletion can produce severe deficiency symptoms.
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Affiliation(s)
- Manaki Mimura
- Horticultural Sciences Department, University of Florida, Gainesville, Florida 32611
| | - Rémi Zallot
- Microbiology and Cell Science Department, University of Florida, Gainesville, Florida 32611
| | - Thomas D Niehaus
- Horticultural Sciences Department, University of Florida, Gainesville, Florida 32611
| | - Ghulam Hasnain
- Horticultural Sciences Department, University of Florida, Gainesville, Florida 32611
| | - Satinder K Gidda
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Thuy N D Nguyen
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Erin M Anderson
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Robert T Mullen
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Greg Brown
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
| | - Alexander F Yakunin
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
| | | | - Jesse F Gregory
- Food Science and Human Nutrition Department, University of Florida, Gainesville, Florida 32611
| | - Donald R McCarty
- Horticultural Sciences Department, University of Florida, Gainesville, Florida 32611
| | - Andrew D Hanson
- Horticultural Sciences Department, University of Florida, Gainesville, Florida 32611
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13
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Baldwin EJ, Harrington DJ, Sampson B, Feher MD, Wierzbicki AS. Safety of long-term restrictive diets for peroxisomal disorders: vitamin and trace element status of patients treated for Adult Refsum Disease. Int J Clin Pract 2016; 70:229-35. [PMID: 26799636 DOI: 10.1111/ijcp.12770] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Adult Refsum's Disease (ARD) is caused by defects in the pathway for alpha-oxidation of phytanic acid (PA). Treatment involves restricting the dietary intake of phytanic acid by reducing the intake of dairy-derived fat. The adequacy of micronutrient intake in patients with ARD is unknown. METHODS Patients established on the Chelsea low-PA diet had general diet macronutrients, vitamins and trace elements assessed using 7-day-weighed intakes and serial 24-h recalls. Intakes were compared with biochemical assessments of nutritional status for haematinics (ferritin), trace elements (copper, zinc, iron, selenium), water- (vitamin B6 , B12 and folate) and fat-soluble vitamins (A, D, E and K). RESULTS Eleven subjects (four women, seven men) were studied. Body mass index was 27 ± 5 kg/m(2) (range 19-38). All subjects had high sodium intakes (range 1873-4828 mg). Fat-soluble vitamin insufficiencies occurred in some individuals (vitamin A, n = 2; vitamin D, n = 6; vitamin E, n = 3; vitamin K, n = 10) but were not coincident. Vitamin B6 levels were normal or elevated (n = 6). Folate and 5-methyltetrahydrofolate concentrations were normal. Metabolic vitamin B12 insufficiency was suspected in four subjects based on elevated methylmalonic acid concentrations. Low copper and selenium intakes were noted in some subjects (n = 7, n = 2) but plasma levels were adequate. Iron, ferritin and zinc intakes and concentrations were normal. CONCLUSION Subjects with ARD can be safely managed on the Chelsea low PA without routine micronutrient supplementation. Sodium intake should be monitored and reduced. Periodic nutritional screening may be necessary for fat-soluble vitamins, vitamin B12 , copper or selenium.
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Affiliation(s)
- E J Baldwin
- Adult Refsum Disease Clinic, Chelsea & Westminster Hospital, London, UK
| | - D J Harrington
- Nutristasis Unit, Viapath, Guy's & St Thomas' Hospitals, London, UK
| | - B Sampson
- Trace Element Laboratory, Imperial College Healthcare, Charing Cross Hospital, London, UK
| | - M D Feher
- Adult Refsum Disease Clinic, Chelsea & Westminster Hospital, London, UK
| | - A S Wierzbicki
- Adult Refsum Disease Clinic, Chelsea & Westminster Hospital, London, UK
- Department of Metabolic Medicine/Chemical Pathology, Guy's & St Thomas' Hospitals, London, UK
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14
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Bacterial and plant HAD enzymes catalyse a missing phosphatase step in thiamin diphosphate biosynthesis. Biochem J 2016; 473:157-66. [DOI: 10.1042/bj20150805] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 11/03/2015] [Indexed: 01/17/2023]
Abstract
To make thiamin diphosphate (ThDP), plants and many micro-organisms first dephosphorylate thiamin monophosphate (ThMP). This dephosphorylation has been thought to be mediated by non-specific enzymes. However, comparative genomic, genetic and biochemical evidences implicate specific HAD family phosphatases in bacteria and plants.
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15
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Lonsdale D. Sudden infant death syndrome and abnormal metabolism of thiamin. Med Hypotheses 2015; 85:922-6. [DOI: 10.1016/j.mehy.2015.09.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 09/09/2015] [Indexed: 11/25/2022]
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16
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Fraser JL, Vanderver A, Yang S, Chang T, Cramp L, Vezina G, Lichter-Konecki U, Cusmano-Ozog KP, Smpokou P, Chapman KA, Zand DJ. Thiamine pyrophosphokinase deficiency causes a Leigh Disease like phenotype in a sibling pair: identification through whole exome sequencing and management strategies. Mol Genet Metab Rep 2014; 1:66-70. [PMID: 27896076 PMCID: PMC5121315 DOI: 10.1016/j.ymgmr.2013.12.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2013] [Accepted: 12/26/2013] [Indexed: 11/29/2022] Open
Abstract
We present a sibling pair with Leigh-like disease, progressive hypotonia, regression, and chronic encephalopathy. Whole exome sequencing in the younger sibling demonstrated a homozygous thiamine pyrophosphokinase (TPK) mutation. Initiation of high dose thiamine, niacin, biotin, α-lipoic acid and ketogenic diet in this child demonstrated improvement in neurologic function and re-attainment of previously lost milestones. The diagnosis of TPK deficiency was difficult due to inconsistent biochemical and diagnostic parameters, rapidity of clinical demise and would not have been made in a timely manner without the use of whole exome sequencing. Molecular diagnosis allowed for attempt at dietary modification with cofactor supplementation which resulted in an improved clinical course.
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Affiliation(s)
- Jamie L Fraser
- Pediatrics Residency Program, Children's National Medical Center, Washington, DC, USA; Medical Genetics Training Program, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Adeline Vanderver
- Division of Neurology, Children's National Medical Center, Washington, DC, USA
| | - Sandra Yang
- Division of Genetics and Metabolism, Children's National Medical Center, Washington, DC, USA
| | - Taeun Chang
- Division of Neurology, Children's National Medical Center, Washington, DC, USA
| | - Laura Cramp
- Division of Neurology, Children's National Medical Center, Washington, DC, USA
| | - Gilbert Vezina
- Department of Radiology, Children's National Medical Center, Washington, DC, USA
| | - Uta Lichter-Konecki
- Division of Genetics and Metabolism, Children's National Medical Center, Washington, DC, USA
| | - Kristina P Cusmano-Ozog
- Division of Genetics and Metabolism, Children's National Medical Center, Washington, DC, USA
| | - Patroula Smpokou
- Division of Genetics and Metabolism, Children's National Medical Center, Washington, DC, USA
| | - Kimberly A Chapman
- Division of Genetics and Metabolism, Children's National Medical Center, Washington, DC, USA
| | - Dina J Zand
- Division of Genetics and Metabolism, Children's National Medical Center, Washington, DC, USA
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17
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Guan JC, Hasnain G, Garrett TJ, Chase CD, Gregory J, Hanson AD, McCarty DR. Divisions of labor in the thiamin biosynthetic pathway among organs of maize. FRONTIERS IN PLANT SCIENCE 2014; 5:370. [PMID: 25136345 PMCID: PMC4120688 DOI: 10.3389/fpls.2014.00370] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 07/11/2014] [Indexed: 05/06/2023]
Abstract
The B vitamin thiamin is essential for central metabolism in all cellular organisms including plants. While plants synthesize thiamin de novo, organs vary widely in their capacities for thiamin synthesis. We use a transcriptomics approach to appraise the distribution of de novo synthesis and thiamin salvage pathways among organs of maize. We identify at least six developmental contexts in which metabolically active, non-photosynthetic organs exhibit low expression of one or both branches of the de novo thiamin biosynthetic pathway indicating a dependence on inter-cellular transport of thiamin and/or thiamin precursors. Neither the thiazole (THI4) nor pyrimidine (THIC) branches of the pathway are expressed in developing pollen implying a dependence on import of thiamin from surrounding floral and inflorescence organs. Consistent with that hypothesis, organs of the male inflorescence and flowers are shown to have high relative expression of the thiamin biosynthetic pathway and comparatively high thiamin contents. By contrast, divergent patterns of THIC and THI4 expression occur in the shoot apical meristem, embyro sac, embryo, endosperm, and root-tips suggesting that these sink organs acquire significant amounts of thiamin via salvage pathways. In the root and shoot meristems, expression of THIC in the absence of THI4 indicates a capacity for thiamin synthesis via salvage of thiazole, whereas the opposite pattern obtains in embryo and endosperm implying that seed storage organs are poised for pyrimidine salvage. Finally, stable isotope labeling experiments set an upper limit on the rate of de novo thiamin biosynthesis in maize leaf explants. Overall, the observed patterns of thiamin biosynthetic gene expression mirror the strategies for thiamin acquisition that have evolved in bacteria.
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Affiliation(s)
- Jiahn-Chou Guan
- Genetics Institute and Horticultural Sciences Department, Institute of Food and Agricultural Sciences, University of FloridaGainesville, FL, USA
| | - Ghulam Hasnain
- Horticultural Sciences Department, Institute of Food and Agricultural Sciences, University of FloridaGainesville, FL, USA
| | - Timothy J. Garrett
- Department of Pathology, Immunology, and Laboratory Medicine, College of Medicine, University of FloridaGainesville, FL, USA
| | - Christine D. Chase
- Genetics Institute and Horticultural Sciences Department, Institute of Food and Agricultural Sciences, University of FloridaGainesville, FL, USA
| | - Jesse Gregory
- Department of Food Science and Human Nutrition, Institute of Food and Agricultural Sciences, University of FloridaGainesville, FL, USA
| | - Andrew D. Hanson
- Horticultural Sciences Department, Institute of Food and Agricultural Sciences, University of FloridaGainesville, FL, USA
| | - Donald R. McCarty
- Genetics Institute and Horticultural Sciences Department, Institute of Food and Agricultural Sciences, University of FloridaGainesville, FL, USA
- *Correspondence: Donald R. McCarty, Genetics Institute and Horticultural Sciences Department, Institute of Food and Agricultural Sciences, University of Florida, PO 110690, Gainesville, FL 32611, USA e-mail:
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18
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Abstract
Genes specifying the thiamin monophosphate phosphatase and adenylated thiazole diphosphatase steps in fungal and plant thiamin biosynthesis remain unknown, as do genes for ThDP (thiamin diphosphate) hydrolysis in thiamin metabolism. A distinctive Nudix domain fused to Tnr3 (thiamin diphosphokinase) in Schizosaccharomyces pombe was evaluated as a candidate for these functions. Comparative genomic analysis predicted a role in thiamin metabolism, not biosynthesis, because free-standing homologues of this Nudix domain occur not only in fungi and plants, but also in proteobacteria (whose thiamin biosynthesis pathway has no adenylated thiazole or thiamin monophosphate hydrolysis steps) and animals (which do not make thiamin). Supporting this prediction, recombinant Tnr3 and its Saccharomyces cerevisiae, Arabidopsis and maize Nudix homologues lacked thiamin monophosphate phosphatase activity, but were active against ThDP, and up to 60-fold more active against diphosphates of the toxic thiamin degradation products oxy- and oxo-thiamin. Deleting the S. cerevisiae Nudix gene (YJR142W) lowered oxythiamin resistance, overexpressing it raised resistance, and expressing its plant or bacterial counterparts restored resistance to the YJR142W deletant. By converting the diphosphates of damaged forms of thiamin into monophosphates, the Tnr3 Nudix domain and its homologues can pre-empt the misincorporation of damaged diphosphates into ThDP-dependent enzymes, and the resulting toxicity.
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19
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The role of thiamine pyrophosphate in prevention of cisplatin ototoxicity in an animal model. ScientificWorldJournal 2013; 2013:182694. [PMID: 24163613 PMCID: PMC3791633 DOI: 10.1155/2013/182694] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Accepted: 07/11/2013] [Indexed: 12/20/2022] Open
Abstract
Objective. The aim of this study was to evaluate the effectiveness of thiamine pyrophosphate against cisplatin-induced ototoxicity in guinea pigs. Materials and Methods. Healthy guinea pigs (n = 18) were randomly divided into three groups. Group 1 (n = 6) received an intraperitoneal injection of saline solution and cisplatin for 7 days, group 2 (n = 6) received an intraperitoneal injection of thiamine pyrophosphate and cisplatin for 7 days, and group 3 (n = 6) received only intraperitoneal injection of saline for 7 days. The animals in all groups were sacrificed under anesthesia, and their cochleas were harvested for morphological and biochemical observations. Results. In group 1, receiving only cisplatin, cochlear glutathione concentrations, superoxide dismutase, and glutathione peroxidase activities significantly decreased (P < 0.05) and malondialdehyde concentrations significantly increased (P < 0.05) compared to the control group. In group 2, receiving thiamine pyrophosphate and cisplatin, the concentrations of enzymes were near those of the control group. Microscopic examination showed that outer hair cells, spiral ganglion cells, and stria vascularis were preserved in group 2. Conclusion. Systemic administration of thiamine pyrophosphate yielded statistically significant protection to the cochlea of guinea pigs from cisplatin toxicity. Further experimental animal studies are essential to determine the appropriate indications of thiamine pyrophosphate before clinical use.
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20
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The effect of thiamine and thiamine pyrophosphate on oxidative liver damage induced in rats with cisplatin. BIOMED RESEARCH INTERNATIONAL 2013; 2013:783809. [PMID: 23841092 PMCID: PMC3690212 DOI: 10.1155/2013/783809] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Revised: 05/21/2013] [Accepted: 05/23/2013] [Indexed: 11/18/2022]
Abstract
The aim of this study was to investigate the effect of thiamine and thiamine pyrophosphate (TPP) on oxidative stress induced with cisplatin in liver tissue. Rats were divided into four groups; thiamine group (TG), TPP + cisplatin group (TPG), healthy animal group (HG), and cisplatin only group (CG). Oxidant and antioxidant parameters in liver tissue and AST, ALT, and LDH levels in rat sera were measured in all groups. Malondialdehyde levels in the CG, TG, TPG, and HG groups were 11 ± 1.4, 9 ± 0.5, 3 ± 0.5, and 2.2 ± 0.48 μ mol/g protein, respectively. Total glutathione levels were 2 ± 0.7, 2.8 ± 0.4, 7 ± 0.8, and 9 ± 0.6 nmol/g protein, respectively. Levels of 8-OH/Gua, a product of DNA damage, were 2.7 ± 0.4 pmol/L, 2.5 ± 0.5, 1.1 ± 0.3, and 0.9 ± 0.3 pmol/L, respectively. A statistically significant difference was determined in oxidant/antioxidant parameters and AST, ALT, and LDH levels between the TPG and CG groups (P < 0.05). No significant difference was determined between the TG and CG groups (P > 0.05). In conclusion, cisplatin causes oxidative damage in liver tissue. TPP seems to have a preventive effect on oxidative stress in the liver caused by cisplatin.
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21
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Role of thiamine pyrophosphate in oligomerisation, functioning and import of peroxisomal 2-hydroxyacyl-CoA lyase. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2011; 1814:1226-33. [PMID: 21708296 DOI: 10.1016/j.bbapap.2011.06.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Revised: 05/26/2011] [Accepted: 06/10/2011] [Indexed: 11/20/2022]
Abstract
During peroxisomal α-oxidation, the CoA-esters of phytanic acid and 2-hydroxylated straight chain fatty acids are cleaved into a (n-1) fatty aldehyde and formyl-CoA by 2-hydroxyacyl-CoA lyase (HACL1). HACL1 is imported into peroxisomes via the PEX5/PTS1 pathway, and so far, it is the only known peroxisomal TPP-dependent enzyme in mammals. In this study, the effect of mutations in the TPP-binding domain of HACL1 on enzyme activity, subcellular localisation and oligomerisation was investigated. Mutations of the aspartate 455 and serine 456 residues within the TPP binding domain of the human HACL1 did not affect the targeting upon expression in transfected CHO cells, although enzyme activity was abolished. Gel filtration of native and mutated N-His(6)-fusions, expressed in yeast, revealed that the mutations did not influence the oligomerisation of the (apo)enzyme. Subcellular fractionation of yeast cells expressing HACL1 showed that the lyase activity sedimented at high density in a Nycodenz gradient. In these fractions TPP could be measured, but not when mutated HACL1 was expressed, although the recombinant enzyme was still targeted to peroxisomes. These findings indicate that the binding of TPP is not required for peroxisomal targeting and correct folding of HACL1, in contrast to other TPP-dependent enzymes, and suggest that transport of TPP into peroxisomes is dependent on HACL1 import, without requirement of a specific solute transporter.
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22
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Dębski B, Kurył T, Gralak MA, Pierzynowska J, Drywień M. Effect of inulin and oligofructose enrichment of the diet on rats suffering thiamine deficiency. J Anim Physiol Anim Nutr (Berl) 2010; 95:335-42. [DOI: 10.1111/j.1439-0396.2010.01059.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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23
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Van Veldhoven PP. Biochemistry and genetics of inherited disorders of peroxisomal fatty acid metabolism. J Lipid Res 2010; 51:2863-95. [PMID: 20558530 DOI: 10.1194/jlr.r005959] [Citation(s) in RCA: 243] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
In humans, peroxisomes harbor a complex set of enzymes acting on various lipophilic carboxylic acids, organized in two basic pathways, alpha-oxidation and beta-oxidation; the latter pathway can also handle omega-oxidized compounds. Some oxidation products are crucial to human health (primary bile acids and polyunsaturated FAs), whereas other substrates have to be degraded in order to avoid neuropathology at a later age (very long-chain FAs and xenobiotic phytanic acid and pristanic acid). Whereas total absence of peroxisomes is lethal, single peroxisomal protein deficiencies can present with a mild or severe phenotype and are more informative to understand the pathogenic factors. The currently known single protein deficiencies equal about one-fourth of the number of proteins involved in peroxisomal FA metabolism. The biochemical properties of these proteins are highlighted, followed by an overview of the known diseases.
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Affiliation(s)
- Paul P Van Veldhoven
- Katholieke Universiteit Leuven, Department of Molecular Cell Biology, LIPIT, Campus Gasthuisberg, Herestraat, Leuven, Belgium.
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24
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Bettendorff L, Wins P. Thiamin diphosphate in biological chemistry: new aspects of thiamin metabolism, especially triphosphate derivatives acting other than as cofactors. FEBS J 2009; 276:2917-25. [DOI: 10.1111/j.1742-4658.2009.07019.x] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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25
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Metabolic and structural role of thiamine in nervous tissues. Cell Mol Neurobiol 2008; 28:923-31. [PMID: 18642074 DOI: 10.1007/s10571-008-9297-7] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2007] [Accepted: 06/30/2008] [Indexed: 02/03/2023]
Abstract
In the literature, previous descriptions of the role of thiamine (B1 vitamin) focused mostly on its biochemical functions as a coenzyme precursor of some key enzymes of the carbohydrate metabolism. This report reviews recent developments on the metabolic and structural role of thiamine, e.g., the coenzyme and noncoenzyme functions of the vitamin. Taking into account analysis of our experimental data relating to the effects of thiamine deficiency on developing central nervous system (CNS) and data available in literature, we seek to establish a clear difference between the metabolic and structural role of thiamine. Our experimental data indicate that the specific and nonspecific effects express two diametrically diverse functions of thiamine in development: the nonspecific effects show up the metabolic consequences of thiamine deficiency resulting in apoptosis and severe cellular deficit; inversely, the specific effects announced the structural consequences of thiamine deficiency, described as cellular membrane damage, irregular and ectopic cells. The review highlights the existence of noncoenzyme functions of this vitamin through its interactions with biological membranes.
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26
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Petrovic MM, Scepanovic L, Rosic G, Mitrovic DM. Properties of thiamin transport in isolated perfused hearts of chronically alcoholic guinea pigsThis article is one of a selection of papers published in the special issue Bridging the Gap: Where Progress in Cardiovascular and Neurophysiologic Research Meet. Can J Physiol Pharmacol 2008; 86:160-5. [DOI: 10.1139/y08-013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The aim of this study was to determine the mechanism of transport of 14C-thiamin in the hearts of healthy (nonalcoholic) and chronically alcoholic guinea pigs. We used the single-pass, paired-tracer dilution method on isolated and retrogradely perfused guinea pig hearts. The maximal cellular uptake (Umax) and total cellular uptake (Utot) of 14C-thiamin were determined under control conditions and under influence of possible modifiers. We tested how the presence of unlabeled thiamin, metabolic inhibitors, or absence of sodium ions influence the transport of 14C-thiamin. The results of our experiments show that the transport of 14C-thiamin is specific and energy-dependent and that its properties are significantly changed under the influence of chronic alcoholism. The latter effect occurs by increase in both Umax and Utot, as a manifestation of a compensatory mechanism in thiamin deficiency.
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Affiliation(s)
- Milos M. Petrovic
- Institute of Physiology, School of Medicine, Visegradska 26/II, Belgrade 11000, Serbia
- University of Kragujevac, Faculty of Medicine, Svetozara Markovica 69, Kragujevac 34000, Serbia
| | - Ljiljana Scepanovic
- Institute of Physiology, School of Medicine, Visegradska 26/II, Belgrade 11000, Serbia
- University of Kragujevac, Faculty of Medicine, Svetozara Markovica 69, Kragujevac 34000, Serbia
| | - Gvozden Rosic
- Institute of Physiology, School of Medicine, Visegradska 26/II, Belgrade 11000, Serbia
- University of Kragujevac, Faculty of Medicine, Svetozara Markovica 69, Kragujevac 34000, Serbia
| | - Dusan M. Mitrovic
- Institute of Physiology, School of Medicine, Visegradska 26/II, Belgrade 11000, Serbia
- University of Kragujevac, Faculty of Medicine, Svetozara Markovica 69, Kragujevac 34000, Serbia
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The role of 2-hydroxyacyl-CoA lyase, a thiamin pyrophosphate-dependent enzyme, in the peroxisomal metabolism of 3-methyl-branched fatty acids and 2-hydroxy straight-chain fatty acids. Biochem Soc Trans 2008; 35:876-80. [PMID: 17956236 DOI: 10.1042/bst0350876] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
2-Hydroxyphytanoyl-CoA lyase (abbreviated as 2-HPCL), renamed to 2-hydroxyacyl-CoA lyase (abbreviated as HACL1), is the first peroxisomal enzyme in mammals that has been found to be dependent on TPP (thiamin pyrophosphate). It was discovered in 1999, when studying alpha-oxidation of phytanic acid. HACL1 has an important role in at least two pathways: (i) the degradation of 3-methyl-branched fatty acids like phytanic acid and (ii) the shortening of 2-hydroxy long-chain fatty acids. In both cases, HACL1 catalyses the cleavage step, which involves the splitting of a carbon-carbon bond between the first and second carbon atom in a 2-hydroxyacyl-CoA intermediate leading to the production of an (n-1) aldehyde and formyl-CoA. The latter is rapidly converted into formate and subsequently to CO(2). HACL1 is a homotetramer and has a PTS (peroxisomal targeting signal) at the C-terminal side (PTS1). No deficiency of HACL1 has been described yet in human, but thiamin deficiency might affect its activity.
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