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Gutiérrez-Rey M, Castellar-Visbal L, Acevedo-Vergara K, Vargas-Manotas J, Rivera-Porras D, Londoño-Juliao G, Castillo-Guerrero B, Perdomo-Jiménez MC, Bermúdez V. The Weight of Bariatric Surgery: Wernicke-Korsakoff Syndrome after Vertical Sleeve Gastrectomy-A Case Series. J Pers Med 2024; 14:638. [PMID: 38929859 PMCID: PMC11204981 DOI: 10.3390/jpm14060638] [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: 04/18/2024] [Revised: 06/05/2024] [Accepted: 06/08/2024] [Indexed: 06/28/2024] Open
Abstract
In this case series, the simultaneous occurrence of Wernicke's encephalopathy (WE) and dry beriberi was reported in three patients who underwent vertical sleeve gastrectomy (VSG) between May 2021 and May 2023. All patients were obese women who underwent vertical sleeve gastrectomy (VSG) without immediate postoperative complications, but two weeks later, hyperemesis and subsequent encephalopathy with ocular movement abnormalities and weakness were observed over the following thirty days. Patients were referred to neurology, where due to the high suspicion of WE, thiamine replacement therapy was initiated; meanwhile, diagnostic neuroimaging and blood tests were conducted. Neurological and psychiatric evaluations and neuroconduction studies were performed to assess the clinical evolution and present sequelae. One year after diagnosis, all patients exhibited affective and behavioral sequelae, anterograde memory impairment, and executive functioning deficits. Two patients met the criteria for Korsakoff syndrome. Additionally, peripheral nervous system sequelae were observed, with all patients presenting with sensorimotor polyneuropathy. In conclusion, Wernicke's encephalopathy requires a high diagnostic suspicion for timely intervention and prevention of irreversible sequelae, which can be devastating. Therefore, raising awareness among medical professionals regarding the significance of this disease is essential.
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Affiliation(s)
- Melissa Gutiérrez-Rey
- Universidad Simón Bolívar, Facultad de Ciencias de la Salud, Barranquilla 080001, Colombia; (M.G.-R.); (L.C.-V.); (J.V.-M.); (G.L.-J.); (B.C.-G.); (M.-C.P.-J.)
| | - Lily Castellar-Visbal
- Universidad Simón Bolívar, Facultad de Ciencias de la Salud, Barranquilla 080001, Colombia; (M.G.-R.); (L.C.-V.); (J.V.-M.); (G.L.-J.); (B.C.-G.); (M.-C.P.-J.)
| | | | - José Vargas-Manotas
- Universidad Simón Bolívar, Facultad de Ciencias de la Salud, Barranquilla 080001, Colombia; (M.G.-R.); (L.C.-V.); (J.V.-M.); (G.L.-J.); (B.C.-G.); (M.-C.P.-J.)
| | - Diego Rivera-Porras
- Universidad Simón Bolívar, Facultad de Ciencias Jurídicas y Sociales, Centro de Investigación en Estudios Fronterizos, Cúcuta 540001, Colombia;
| | - Gloria Londoño-Juliao
- Universidad Simón Bolívar, Facultad de Ciencias de la Salud, Barranquilla 080001, Colombia; (M.G.-R.); (L.C.-V.); (J.V.-M.); (G.L.-J.); (B.C.-G.); (M.-C.P.-J.)
| | - Brenda Castillo-Guerrero
- Universidad Simón Bolívar, Facultad de Ciencias de la Salud, Barranquilla 080001, Colombia; (M.G.-R.); (L.C.-V.); (J.V.-M.); (G.L.-J.); (B.C.-G.); (M.-C.P.-J.)
| | - María-Camila Perdomo-Jiménez
- Universidad Simón Bolívar, Facultad de Ciencias de la Salud, Barranquilla 080001, Colombia; (M.G.-R.); (L.C.-V.); (J.V.-M.); (G.L.-J.); (B.C.-G.); (M.-C.P.-J.)
| | - Valmore Bermúdez
- Universidad Simón Bolívar, Facultad de Ciencias de la Salud, Barranquilla 080001, Colombia; (M.G.-R.); (L.C.-V.); (J.V.-M.); (G.L.-J.); (B.C.-G.); (M.-C.P.-J.)
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2
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Zahr NM. Race explains substantial variance in whole blood thiamine diphosphate concentrations. Nutr Res 2024; 126:138-150. [PMID: 38696890 PMCID: PMC11179978 DOI: 10.1016/j.nutres.2024.03.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 03/21/2024] [Accepted: 03/21/2024] [Indexed: 05/04/2024]
Abstract
Deficiency for thiamine (vitamin B1), traditionally assessed via the activity of the thiamine-dependent enzyme erythrocyte transketolase, has been reported in individuals with alcohol use disorder (AUD) and in people with HIV; concentrations of the metabolically active diphosphate form, however, have yet to be reported in HIV cohorts and results in AUD are equivocal. In this cross-sectional study, samples from 170 AUD, 130 HIV, and 100 healthy control individuals were analyzed to test the hypothesis that AUD and HIV groups relative to healthy controls would show low whole blood thiamine diphosphate (TDP) concentrations related to peripheral neuropathy. TDP concentrations were not different in the 3 study groups (P = .6141) but were lower in Black (n = 172) relative to White (n = 155) individuals (P < .0001) regardless of group. In a multiple regression, race relative to diagnoses explained more than 10 times the variance in whole blood TDP concentrations (F4,395 = 3.5, P = .0086; r2 = 15.1]. Performance on a measure of peripheral neuropathy (2-point discrimination) was worse in the HIV and AUD cohorts relative to the healthy control group (P < .0001) but was not associated with TDP concentrations. These findings suggest that Black individuals carry a heightened vulnerability for low whole blood TDP concentrations, but the clinical significance and mechanisms underlying these results remain to be determined.
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Affiliation(s)
- Natalie M Zahr
- Department of Psychiatry & Behavioral Sciences, Stanford University, School of Medicine, Stanford, CA 94305, USA; Neuroscience Program, SRI International, Menlo Park, CA, 94025, USA.
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3
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Oretomiloye F, Adewole D. Exploring the modulatory effects of brown seaweed meal and extracts on intestinal microbiota and morphology of broiler chickens challenged with heat stress. Poult Sci 2024; 103:103562. [PMID: 38417338 PMCID: PMC10909895 DOI: 10.1016/j.psj.2024.103562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 02/09/2024] [Accepted: 02/12/2024] [Indexed: 03/01/2024] Open
Abstract
Brown seaweed (Ascophyllum nodosum) is known for its prebiotic roles and can improve animal intestinal health by enhancing the growth of beneficial microbes and inhibiting pathogenic ones. However, the gut health-modulatory roles of brown seaweed on chickens challenged with heat stress (HS) are rarely studied. The current study examined the effects of brown seaweed meal (SWM) and extract (SWE) on the ceca microbiota and small intestinal morphology of chickens challenged or unchallenged with HS. Three hundred and thirty-six 1-day-old Ross 308 broiler chicks were randomly assigned to either a thermoneutral (TN; 24 ± 1°C); or HS room (HS; 32-34°C, 8 h/d from d 21 to 27). All birds in each room were randomly allotted to 4 treatments - control (CON), CON + 1 mL/L seaweed extract (SWE) in drinking water, CON + 2 mL/L SWE in drinking water, and CON + 2% seaweed meal (SWM) in feed and raised for 28 d. On d 14 and 28, 12 and 24 birds per treatment group, respectively, were euthanized to collect the ceca content for gut microbiota analysis and small intestinal tissues for morphological examination. On d 14, 2% SWM increased (P = 0.047) the relative abundance of cecal Fecalibacterium and all brown seaweed treatments improved jejunal villus height (VH) and VH:CD compared to the CON diet. On d 28, HS significantly reduced (P < 0.05) ileal VH, VW, and VH:CD, and duodenal VH and VH:CD. Among the HS group, 2% SWM and 2 mL/L SWE significantly increased (P < 0.05) the relative abundance of Lactobacillus, Sellimonas, and Fournierella, compared to the CON diet. HS birds fed with 2% SWM had higher ileal VH and VH:CD compared to other treatments. In summary, SWM and SWE enhanced the abundance of beneficial microbes and improved small intestinal morphology among HS chickens. This implies that seaweed could potentially alleviate HS-induced intestinal impairment in chickens.
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Affiliation(s)
- Fisayo Oretomiloye
- Department of Animal Science and Aquaculture, Faculty of Agriculture, Dalhousie University, Truro, Nova Scotia, B2N 5E3, Canada
| | - Deborah Adewole
- Department of Animal Science and Aquaculture, Faculty of Agriculture, Dalhousie University, Truro, Nova Scotia, B2N 5E3, Canada; Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5A8, Canada.
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4
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De Vitto H, Belfon KKJ, Sharma N, Toay S, Abendroth J, Dranow DM, Lukacs CM, Choi R, Udell HS, Willis S, Barrera G, Beyer O, Li TD, Hicks KA, Torelli AT, French JB. Characterization of an Acinetobacter baumannii Monofunctional Phosphomethylpyrimidine Kinase That Is Inhibited by Pyridoxal Phosphate. Biochemistry 2024. [PMID: 38306231 DOI: 10.1021/acs.biochem.3c00640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2024]
Abstract
Thiamin and its phosphate derivatives are ubiquitous molecules involved as essential cofactors in many cellular processes. The de novo biosynthesis of thiamin employs the parallel synthesis of 4-methyl-5-(2-hydroxyethyl)thiazole (THZ-P) and 4-amino-2-methyl-5(diphosphooxymethyl) pyrimidine (HMP) pyrophosphate (HMP-PP), which are coupled to generate thiamin phosphate. Most organisms that can biosynthesize thiamin employ a kinase (HMPK or ThiD) to generate HMP-PP. In nearly all cases, this enzyme is bifunctional and can also salvage free HMP, producing HMP-P, the monophosphate precursor of HMP-PP. Here we present high-resolution crystal structures of an HMPK from Acinetobacter baumannii (AbHMPK), both unliganded and with pyridoxal 5-phosphate (PLP) noncovalently bound. Despite the similarity between HMPK and pyridoxal kinase enzymes, our kinetics analysis indicates that AbHMPK accepts HMP exclusively as a substrate and cannot turn over pyridoxal, pyridoxamine, or pyridoxine nor does it display phosphatase activity. PLP does, however, act as a weak inhibitor of AbHMPK with an IC50 of 768 μM. Surprisingly, unlike other HMPKs, AbHMPK catalyzes only the phosphorylation of HMP and does not generate the diphosphate HMP-PP. This suggests that an additional kinase is present in A. baumannii, or an alternative mechanism is in operation to complete the biosynthesis of thiamin.
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Affiliation(s)
- Humberto De Vitto
- The Hormel Institute, University of Minnesota, Austin, Minnesota 55912, United States
| | - Kafi K J Belfon
- Department of Biochemistry and Cell Biology, Stony Brook University, Stony Brook, New York 11790, United States
| | - Nandini Sharma
- The Hormel Institute, University of Minnesota, Austin, Minnesota 55912, United States
| | - Sarah Toay
- Department of Biological Chemistry, Grinnell College, Grinnell, Iowa 50112, United States
| | - Jan Abendroth
- UCB BioSciences, Bainbridge Island, Washington 98110, United States
- Seattle Structural Genomics Center for Infectious Disease (SSGCID), Seattle, Washington 98104, United States
| | - David M Dranow
- UCB BioSciences, Bainbridge Island, Washington 98110, United States
- Seattle Structural Genomics Center for Infectious Disease (SSGCID), Seattle, Washington 98104, United States
| | - Christine M Lukacs
- UCB BioSciences, Bainbridge Island, Washington 98110, United States
- Seattle Structural Genomics Center for Infectious Disease (SSGCID), Seattle, Washington 98104, United States
| | - Ryan Choi
- Seattle Structural Genomics Center for Infectious Disease (SSGCID), Seattle, Washington 98104, United States
| | - Hannah S Udell
- Seattle Structural Genomics Center for Infectious Disease (SSGCID), Seattle, Washington 98104, United States
| | - Sydney Willis
- Department of Chemistry, Rollins College, Winter Park, Florida 32789, United States
| | - George Barrera
- Department of Chemistry and Biochemistry, Weber State University, Ogden, Utah 84408, United States
| | - Olive Beyer
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, Maryland 21250, United States
| | - Teng Da Li
- Department of Biochemistry and Cell Biology, Stony Brook University, Stony Brook, New York 11790, United States
| | - Katherine A Hicks
- Chemistry Department, State University of New York at Cortland, Cortland, New York 13045, United States
| | - Andrew T Torelli
- Department of Chemistry, Ithaca College, Ithaca, New York 14850, United States
| | - Jarrod B French
- The Hormel Institute, University of Minnesota, Austin, Minnesota 55912, United States
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Bettendorff L. Synthetic Thioesters of Thiamine: Promising Tools for Slowing Progression of Neurodegenerative Diseases. Int J Mol Sci 2023; 24:11296. [PMID: 37511056 PMCID: PMC10379298 DOI: 10.3390/ijms241411296] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/05/2023] [Accepted: 07/06/2023] [Indexed: 07/30/2023] Open
Abstract
Thiamine (vitamin B1) is essential for the brain. This is attributed to the coenzyme role of thiamine diphosphate (ThDP) in glucose and energy metabolism. The synthetic thiamine prodrug, the thioester benfotiamine (BFT), has been extensively studied and has beneficial effects both in rodent models of neurodegeneration and in human clinical studies. BFT has no known adverse effects and improves cognitive outcomes in patients with mild Alzheimer's disease. In cell culture and animal models, BFT has antioxidant and anti-inflammatory properties that seem to be mediated by a mechanism independent of the coenzyme function of ThDP. Recent in vitro studies show that another thiamine thioester, O,S-dibenzoylthiamine (DBT), is even more efficient than BFT, especially with respect to its anti-inflammatory potency, and is effective at lower concentrations. Thiamine thioesters have pleiotropic properties linked to an increase in circulating thiamine concentrations and possibly in hitherto unidentified open thiazole ring derivatives. The identification of the active neuroprotective metabolites and the clarification of their mechanism of action open extremely promising perspectives in the field of neurodegenerative, neurodevelopmental, and psychiatric conditions. The present review aims to summarize existing data on the neuroprotective effects of thiamine thioesters and give a comprehensive account.
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Affiliation(s)
- Lucien Bettendorff
- Laboratory of Neurophysiology, GIGA Neurosciences, University of Liège, 4000 Liège, Belgium
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Mann RH. Impaired Thiamine Metabolism in Amyotrophic Lateral Sclerosis and Its Potential Treatment With Benfotiamine: A Case Report and a Review of the Literature. Cureus 2023; 15:e40511. [PMID: 37333039 PMCID: PMC10274516 DOI: 10.7759/cureus.40511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/15/2023] [Indexed: 06/20/2023] Open
Abstract
Homogenates of brain tissue from the frontal cortex at autopsy in patients with amyotrophic lateral sclerosis (ALS) showed dramatically reduced levels of the enzyme thiamine pyrophosphatase (TPPase), the enzyme responsible for the conversion of thiamine pyrophosphate (TPP) to thiamine monophosphate (TMP). Additionally, free thiamine (vitamin B1) and TMP levels have been shown to be significantly reduced in the plasma and cerebral spinal fluid (CSF) of patients with ALS. These findings suggest that there is impaired thiamine metabolism in patients with ALS. Impaired thiamine metabolism decreases adenosine triphosphate (ATP) production and is a well-established cause of neurodegeneration. Decreased levels of TPPase, resulting in decreased levels of TMP in the cells of the frontal cortex, might account for the focal neurodegenerative changes observed in motor neurons in ALS. Benfotiamine, a safe, lipid-soluble, highly absorbable thiamine analogue, significantly raises free thiamine, TMP, and TPP levels in the blood. A case in which benfotiamine may have positively impacted the symptoms of a patient with ALS is presented. The use of benfotiamine in patients with ALS appears to be a promising therapeutic option. Considering the severity and the lack of satisfactory treatment options associated with this disease, more research on the effects of benfotiamine on the course of ALS is urgently needed.
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Islas-Fabila P, Bonilla-Jaime H, González-Hernández M, Vega-Manríquez X, Jiménez-Collado CA, Ballesteros-Rodea G, de la Cruz-Cruz LA, Orozco-Gregorio H, Roldán-Santiago P. Effect of thiamine pyrophosphate on the characteristics of farrowing and piglet vitality. Theriogenology 2023; 200:49-59. [PMID: 36758457 DOI: 10.1016/j.theriogenology.2023.01.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 01/27/2023] [Accepted: 01/30/2023] [Indexed: 02/04/2023]
Abstract
Asphyxia is considered the main non-infectious cause of prepartum mortality in swine, as well as an important factor that negatively affects neonatal vitality and can trigger physiological and metabolic disorders. Hence, the search for pharmacological protocols to reduce the harmful effects of asphyxia is a key area of research. Recent observations show that administering thiamine pyrophosphate (TPP) prior to a hypoxic event in certain species (rabbits, rats) has a neuroprotector effect that preserves energy metabolism under hypoxic conditions. Given this, the objective of this study was to evaluate a prophylactic protocol in high- and low-vitality neonate piglets based on TPP's effect on physiological and metabolic responses, body temperature, and weight. A total of 149 piglets born from 15 multiparous sows were used. The dams were randomly divided into two groups: control (NaCl 0.9%) and TPP (25 ml of TTP) administered 24 and 12 h before the expected farrowing date. The following reproductive variables of the sows were recorded: duration of farrowing, total number of piglets born per litter, number of liveborn piglets per litter, number of stillbirths and mummified fetuses at birth, and number of live piglets at weaning. In addition, the expulsion interval and vitality of all neonates were evaluated, body temperatures were recorded at ten intervals, and physiological profiles (blood gases, electrolytes, glucose) were registered for each neonate. Results show that the TPP-treated sows had shorter farrowing duration (P = 0.0060) and higher percentage of high-vitality neonates (60%). Moreover, their offspring exhibited greater vitality, fewer imbalances in their physiological and metabolic profiles, and greater weight gain at weaning (P < 0.0001). Findings suggest that administering TPP exerts a protective effect when hypoxic events occur, though this differs from results obtained with rat pups, where applying TPP after such events did not provide protection from asphyxia-induced damage. These differences may be due to the moment at which TPP was applied. The application time we selected was distinct from the procedure followed with rats because it was based on a dataset that describes the influence of administering TPP as a prophylactic treatment before a hypoxic event. Prophylactic administration of TPP to sows at the end of gestation exerted a neuroprotective effect on neonatal vitality and gas exchanges and energy metabolism in the offspring that were reflected in the greater weekly weight gain in those piglets.
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Affiliation(s)
- Paloma Islas-Fabila
- Programa de Doctorado en Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana, Iztapalapa, 09340, Ciudad de México, México
| | - Herlinda Bonilla-Jaime
- Departamento de Biología de la Reproducción, Universidad Autónoma Metropolitana, Unidad Iztapalapa, 09340, Ciudad de México, México
| | - Milagros González-Hernández
- Facultad de Agronomía y Veterinaria, Universidad Autónoma de San Luis Potosí, San Luis Potosí, 78321, México
| | - Xóchil Vega-Manríquez
- Facultad de Agronomía y Veterinaria, Universidad Autónoma de San Luis Potosí, San Luis Potosí, 78321, México
| | | | - Gilberto Ballesteros-Rodea
- Facultad de Agronomía y Veterinaria, Universidad Autónoma de San Luis Potosí, San Luis Potosí, 78321, México
| | - Luis Alberto de la Cruz-Cruz
- Escuela de Medicina Veterinaria y Zootecnia, Universidad del Valle de México-Coyoacán, Calzada de Tlalpan, 04910, Ciudad de México, México; Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana, Unidad Xochimilco, Calzada del Hueso 1100, Coapa, Villa Quietud, Coyoacán, 04960, Ciudad de México, México
| | - Héctor Orozco-Gregorio
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana, Unidad Xochimilco, Calzada del Hueso 1100, Coapa, Villa Quietud, Coyoacán, 04960, Ciudad de México, México
| | - Patricia Roldán-Santiago
- Departamento de Reproducción, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Avenida Universidad, 04510, Ciudad de México, México.
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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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Howe GW, Grenade NL. Sulfite-Catalyzed Nucleophilic Substitution Reactions with Thiamin and Analogous Pyrimidine Donors Proceed via an S NAE Mechanism. J Org Chem 2022; 87:13224-13235. [PMID: 36150085 DOI: 10.1021/acs.joc.2c01685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
When treated with SO32-, thiamin undergoes a substitution reaction to release a thiazole leaving group and the corresponding sulfonate. Although this reaction could proceed via a simple SN2-like mechanism, a multistep addition-elimination (SNAE) mechanism involving the addition of SO32- to C6' of the 4-aminopyrimidine of thiamin has also been proposed. Although this reaction has potential utility in the synthesis of substituted pyrimidines and provides a direct analogue to reactions catalyzed by thiaminases, a detailed mechanistic picture of the SO32--catalyzed cleavage of thiamin has remained elusive. Here, DFT calculations have been used to probe the relative energetics and the factors that shape the potential energy surfaces that define the possible mechanisms of substitution. These calculations provide clear support for the SNAE mechanism over an SN2-like process and illustrate that the unique ability of SO32- to activate thiamin toward nucleophilic displacement is due to the combined nucleophilicity and relatively poor leaving group ability of SO32-. Both of these factors favor the forward partitioning of the sulfite adduct toward the cleavage products whereas adducts formed with other nucleophiles overwhelmingly revert to reactants. Calculations performed with a range of substrates with various electrophilicities and nucleofugalities consistently suggest that the SNAE pathway is significantly lower in energy than the direct substitution, illustrating that this SO32--catalyzed multistep process is likely to be broadly applicable both in solution and in catalysis by thiaminases.
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Affiliation(s)
- Graeme W Howe
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario K7L 3N6, Canada
| | - Neil L Grenade
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario K7L 3N6, Canada
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10
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Li J, Guo C, Wang T, Xu Y, Peng F, Zhao S, Li H, Jin D, Xia Z, Che M, Zuo J, Zheng C, Hu H, Mao G. Interpretable machine learning-derived nomogram model for early detection of diabetic retinopathy in type 2 diabetes mellitus: a widely targeted metabolomics study. Nutr Diabetes 2022; 12:36. [PMID: 35931671 PMCID: PMC9355962 DOI: 10.1038/s41387-022-00216-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 07/10/2022] [Accepted: 07/18/2022] [Indexed: 01/20/2023] Open
Abstract
Objective Early identification of diabetic retinopathy (DR) is key to prioritizing therapy and preventing permanent blindness. This study aims to propose a machine learning model for DR early diagnosis using metabolomics and clinical indicators. Methods From 2017 to 2018, 950 participants were enrolled from two affiliated hospitals of Wenzhou Medical University and Anhui Medical University. A total of 69 matched blocks including healthy volunteers, type 2 diabetes, and DR patients were obtained from a propensity score matching-based metabolomics study. UPLC-ESI-MS/MS system was utilized for serum metabolic fingerprint data. CART decision trees (DT) were used to identify the potential biomarkers. Finally, the nomogram model was developed using the multivariable conditional logistic regression models. The calibration curve, Hosmer–Lemeshow test, receiver operating characteristic curve, and decision curve analysis were applied to evaluate the performance of this predictive model. Results The mean age of enrolled subjects was 56.7 years with a standard deviation of 9.2, and 61.4% were males. Based on the DT model, 2-pyrrolidone completely separated healthy controls from diabetic patients, and thiamine triphosphate (ThTP) might be a principal metabolite for DR detection. The developed nomogram model (including diabetes duration, systolic blood pressure and ThTP) shows an excellent quality of classification, with AUCs (95% CI) of 0.99 (0.97–1.00) and 0.99 (0.95–1.00) in training and testing sets, respectively. Furthermore, the predictive model also has a reasonable degree of calibration. Conclusions The nomogram presents an accurate and favorable prediction for DR detection. Further research with larger study populations is needed to confirm our findings.
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Affiliation(s)
- Jushuang Li
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China.,Center on Evidence-Based Medicine & Clinical Epidemiological Research, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China.,Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Chengnan Guo
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China.,Center on Evidence-Based Medicine & Clinical Epidemiological Research, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Tao Wang
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China.,Center on Evidence-Based Medicine & Clinical Epidemiological Research, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yixi Xu
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China.,Center on Evidence-Based Medicine & Clinical Epidemiological Research, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Fang Peng
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China.,Center on Evidence-Based Medicine & Clinical Epidemiological Research, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Shuzhen Zhao
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China.,Center on Evidence-Based Medicine & Clinical Epidemiological Research, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Huihui Li
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China.,Center on Evidence-Based Medicine & Clinical Epidemiological Research, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Dongzhen Jin
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China.,Center on Evidence-Based Medicine & Clinical Epidemiological Research, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Zhezheng Xia
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China.,Center on Evidence-Based Medicine & Clinical Epidemiological Research, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Mingzhu Che
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China.,Center on Evidence-Based Medicine & Clinical Epidemiological Research, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jingjing Zuo
- Center on Clinical Research, School of Ophthalmology & Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Chao Zheng
- The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Honglin Hu
- Department of Endocrinology, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.
| | - Guangyun Mao
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China. .,Center on Evidence-Based Medicine & Clinical Epidemiological Research, School of Public Health & Management, Wenzhou Medical University, Wenzhou, Zhejiang, China. .,Center on Clinical Research, School of Ophthalmology & Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China.
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11
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Nie Y, Yu L, Mao L, Zou W, Zhang X, Zhao J. Vitamin B 1 THIAMIN REQUIRING1 synthase mediates the maintenance of chloroplast function by regulating sugar and fatty acid metabolism in rice. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2022; 64:1575-1595. [PMID: 35603832 DOI: 10.1111/jipb.13283] [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: 01/24/2022] [Accepted: 05/18/2022] [Indexed: 06/15/2023]
Abstract
Vitamin B1 (VB1), including thiamin, thiamin monophosphate (TMP), and thiamin pyrophosphate (TPP), is an essential micronutrient for all living organisms. Nevertheless, the precise function of VB1 in rice remains unclear. Here, we described a VB1 auxotrophic mutant, chlorotic lethal seedling (cles) from the mutation of OsTH1, which displayed collapsed chloroplast membrane system and decreased pigment content. OsTH1 encoded a phosphomethylpyrimidine kinase/thiamin-phosphate pyrophosphorylase, and was expressed in various tissues, especially in seedlings, leaves, and young panicles. The VB1 content in cles was markedly reduced, despite an increase in the expression of VB1 synthesis genes. The decreased TPP content affected the tricarboxylic acid cycle, pentose phosphate pathway, and de novo fatty acid synthesis, leading to a reduction in fatty acids (C16:0 and C18:0) and sugars (sucrose and glucose) of cles. Additionally, irregular expression of chloroplast membrane synthesis genes led to membrane collapse. We also found that alternative splicing and translation allowed OsTH1 to be localized to both chloroplast and cytosol. Our study revealed that OsTH1 was an essential enzyme in VB1 biosynthesis and played crucial roles in seedling growth and development by participating in fatty acid and sugar metabolism, providing new perspectives on VB1 function in rice.
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Affiliation(s)
- Yanshen Nie
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Li Yu
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Lianlian Mao
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Wenxuan Zou
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Xiufeng Zhang
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Jie Zhao
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
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12
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Palmieri F, Monné M, Fiermonte G, Palmieri L. Mitochondrial transport and metabolism of the vitamin B-derived cofactors thiamine pyrophosphate, coenzyme A, FAD and NAD + , and related diseases: A review. IUBMB Life 2022; 74:592-617. [PMID: 35304818 PMCID: PMC9311062 DOI: 10.1002/iub.2612] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/17/2022] [Accepted: 02/18/2022] [Indexed: 01/19/2023]
Abstract
Multiple mitochondrial matrix enzymes playing key roles in metabolism require cofactors for their action. Due to the high impermeability of the mitochondrial inner membrane, these cofactors need to be synthesized within the mitochondria or be imported, themselves or one of their precursors, into the organelles. Transporters belonging to the protein family of mitochondrial carriers have been identified to transport the coenzymes: thiamine pyrophosphate, coenzyme A, FAD and NAD+ , which are all structurally similar to nucleotides and derived from different B-vitamins. These mitochondrial cofactors bind more or less tightly to their enzymes and, after having been involved in a specific reaction step, are regenerated, spontaneously or by other enzymes, to return to their active form, ready for the next catalysis round. Disease-causing mutations in the mitochondrial cofactor carrier genes compromise not only the transport reaction but also the activity of all mitochondrial enzymes using that particular cofactor and the metabolic pathways in which the cofactor-dependent enzymes are involved. The mitochondrial transport, metabolism and diseases of the cofactors thiamine pyrophosphate, coenzyme A, FAD and NAD+ are the focus of this review.
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Affiliation(s)
- Ferdinando Palmieri
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy.,CNR Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies (IBIOM), Bari, Italy
| | - Magnus Monné
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy.,Department of Sciences, University of Basilicata, Potenza, Italy
| | - Giuseppe Fiermonte
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy.,CNR Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies (IBIOM), Bari, Italy
| | - Luigi Palmieri
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy.,CNR Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies (IBIOM), Bari, Italy
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13
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Guo C, Jiang D, Xu Y, Peng F, Zhao S, Li H, Jin D, Xu X, Xia Z, Che M, Lai M, Huang R, Wang H, Zheng C, Mao G. High-Coverage Serum Metabolomics Reveals Metabolic Pathway Dysregulation in Diabetic Retinopathy: A Propensity Score-Matched Study. Front Mol Biosci 2022; 9:822647. [PMID: 35372500 PMCID: PMC8970305 DOI: 10.3389/fmolb.2022.822647] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 02/07/2022] [Indexed: 11/13/2022] Open
Abstract
Background: Diabetic retinopathy (DR) is a major diabetes-related disease linked to metabolism. However, the cognition of metabolic pathway alterations in DR remains scarce. We aimed to corroborate alterations of metabolic pathways identified in prior studies and investigate novel metabolic dysregulations that may lead to new prevention and treatment strategies for DR. Methods: In this case-control study, we tested 613 serum metabolites in 69 pairs of type 2 diabetic patients (T2DM) with DR and propensity score-matched T2DM without DR via ultra-performance liquid chromatography-tandem mass spectrometry system. Metabolic pathway dysregulation in DR was thoroughly investigated by metabolic pathway analysis, chemical similarity enrichment analysis (ChemRICH), and integrated pathway analysis. The associations of ChemRICH-screened key metabolites with DR were further estimated with restricted cubic spline analyses. Results: A total of 89 differentially expressed metabolites were identified by paired univariate analysis and partial least squares discriminant analysis. We corroborated biosynthesis of unsaturated fatty acids, glycine, serine and threonine metabolism, glutamate and cysteine-related pathways, and nucleotide-related pathways were significantly perturbed in DR, which were identified in prior studies. We also found some novel metabolic alterations associated with DR, including the disturbance of thiamine metabolism and tryptophan metabolism, decreased trehalose, and increased choline and indole derivatives in DR. Conclusions: The results suggest that the metabolism disorder in DR can be better understood through integrating multiple biological knowledge databases. The progression of DR is associated with the disturbance of thiamine metabolism and tryptophan metabolism, decreased trehalose, and increased choline and indole derivatives.
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Affiliation(s)
- Chengnan Guo
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
- Center on Evidence-Based Medicine and Clinical Epidemiological Research, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
| | - Depeng Jiang
- Department of Community Health Sciences, College of Medicine, University of Manitoba, Winnipeg, MB, Canada
| | - Yixi Xu
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
- Center on Evidence-Based Medicine and Clinical Epidemiological Research, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
| | - Fang Peng
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
- Center on Evidence-Based Medicine and Clinical Epidemiological Research, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
| | - Shuzhen Zhao
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
- Center on Evidence-Based Medicine and Clinical Epidemiological Research, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
| | - Huihui Li
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
- Center on Evidence-Based Medicine and Clinical Epidemiological Research, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
| | - Dongzhen Jin
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
- Center on Evidence-Based Medicine and Clinical Epidemiological Research, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
| | - Xin Xu
- Department of Nursing, School of Nursing, Wenzhou Medical University, Wenzhou, China
| | - Zhezheng Xia
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
- Center on Evidence-Based Medicine and Clinical Epidemiological Research, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
| | - Mingzhu Che
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
- Center on Evidence-Based Medicine and Clinical Epidemiological Research, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
| | - Mengyuan Lai
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
- Center on Evidence-Based Medicine and Clinical Epidemiological Research, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
| | - Ruogu Huang
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
- Center on Evidence-Based Medicine and Clinical Epidemiological Research, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
| | - Hui Wang
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
- Center on Evidence-Based Medicine and Clinical Epidemiological Research, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
| | - Chao Zheng
- The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
- *Correspondence: Chao Zheng, , orcid org/0000-0003-3814-4643; Guangyun Mao, , orcid.org/0000-0002-4548-7524
| | - Guangyun Mao
- Division of Epidemiology and Health Statistics, Department of Preventive Medicine, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
- Center on Evidence-Based Medicine and Clinical Epidemiological Research, School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
- Center on Clinical Research, The Eye Hospital of Wenzhou Medical University, Wenzhou, China
- *Correspondence: Chao Zheng, , orcid org/0000-0003-3814-4643; Guangyun Mao, , orcid.org/0000-0002-4548-7524
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14
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Estimation of magnesium and titanium using 3-aminopyridine-2-carbaxaldehyde thiosemicarbazone (triapine) by second-order derivative spectrophotometry. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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15
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Bettendorff L. Update on Thiamine Triphosphorylated Derivatives and Metabolizing Enzymatic Complexes. Biomolecules 2021; 11:1645. [PMID: 34827643 PMCID: PMC8615392 DOI: 10.3390/biom11111645] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/05/2021] [Accepted: 11/06/2021] [Indexed: 12/12/2022] Open
Abstract
While the cellular functions of the coenzyme thiamine (vitamin B1) diphosphate (ThDP) are well characterized, the triphosphorylated thiamine derivatives, thiamine triphosphate (ThTP) and adenosine thiamine triphosphate (AThTP), still represent an intriguing mystery. They are present, generally in small amounts, in nearly all organisms, bacteria, fungi, plants, and animals. The synthesis of ThTP seems to require ATP synthase by a mechanism similar to ATP synthesis. In E. coli, ThTP is synthesized during amino acid starvation, while in plants, its synthesis is dependent on photosynthetic processes. In E. coli, ThTP synthesis probably requires oxidation of pyruvate and may play a role at the interface between energy and amino acid metabolism. In animal cells, no mechanism of regulation is known. Cytosolic ThTP levels are controlled by a highly specific cytosolic thiamine triphosphatase (ThTPase), coded by thtpa, and belonging to the ubiquitous family of the triphosphate tunnel metalloenzymes (TTMs). While members of this protein family are found in nearly all living organisms, where they bind organic and inorganic triphosphates, ThTPase activity seems to be restricted to animals. In mammals, THTPA is ubiquitously expressed with probable post-transcriptional regulation. Much less is known about the recently discovered AThTP. In E. coli, AThTP is synthesized by a high molecular weight protein complex from ThDP and ATP or ADP in response to energy stress. A better understanding of these two thiamine derivatives will require the use of transgenic models.
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Affiliation(s)
- Lucien Bettendorff
- Laboratory of Neurophysiology, GIGA Neurosciences, University of Liège, 4000 Liège, Belgium
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16
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Molecular mechanism of thiamine pyrophosphate import into mitochondria: a molecular simulation study. J Comput Aided Mol Des 2021; 35:987-1007. [PMID: 34406552 DOI: 10.1007/s10822-021-00414-5] [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: 04/09/2021] [Accepted: 07/26/2021] [Indexed: 10/20/2022]
Abstract
The import of thiamine pyrophosphate (TPP) through both mitochondrial membranes was studied using a total of 3-µs molecular dynamics simulations. Regarding the translocation through the mitochondrial outer membrane, our simulations support the conjecture that TPP uses the voltage-dependent anion channel, the major pore of this membrane, for its passage to the intermembrane space, as its transport presents significant analogies with that used by other metabolites previously studied, in particular with ATP. As far as passing through the mitochondrial inner membrane is concerned, our simulations show that the specific carrier of TPP has a single binding site that becomes accessible, through an alternating access mechanism. The preference of this transporter for TPP can be rationalized mainly by three residues located in the binding site that differ from those identified in the ATP/ADP carrier, the most studied member of the mitochondrial carrier family. The simulated transport mechanism of TPP highlights the essential role, at the energetic level, of the contributions coming from the formation and breakage of two networks of salt bridges, one on the side of the matrix and the other on the side of the intermembrane space, as well as the interactions, mainly of an ionic nature, formed by TPP upon its binding. The energy contribution provided by the cytosolic network establishes a lower barrier than that of the matrix network, which can be explained by the lower interaction energy of TPP on the matrix side or possibly a uniport activity.
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17
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Hedhli A, Slim A, Mjid M, Ouachi Y, Kacem M, Cheikh Rouhou S, Merai S, Toujani S, Dhahri B. [Nutritional status and dietary intake in patients with chonic obstructive pulmonary disease]. Rev Mal Respir 2021; 38:689-697. [PMID: 34092448 DOI: 10.1016/j.rmr.2021.04.017] [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: 01/10/2021] [Accepted: 04/13/2021] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Undernutrition is a predictor of mortality in chronic obstructive pulmonary disease (COPD). The objectives of our study were to assess nutritional intake in COPD and to study its relationship with disease severity. METHODS A cross-sectional study that included 66 patients followed for COPD. Patients included had a body composition study and a respiratory and nutritional assessment. RESULTS The mean age of the population was 66±9 years. The lean body mass index (LMI) was reduced in 26.1% of patients. It was significantly associated with the GOLD group (P=0.04) and significantly correlated with the forced expiratory volume in the first second (FEV1) (P=0.02) and the distance covered during the six-minute walk test (TM6) (P=0.01). A significant difference was found between the caloric intakes and the different GOLD groups (P=0.04). Mean intakes of calories (P=0.002; r=0.07), protein (P=0.01; r=0.16), carbohydrates (P=0.02; r=0.2) and iron (P=0.01; r=0.13) were significantly correlated with the TM6 results. Caloric intake was significantly correlated with LMI (P=0.01; r=0.16), body mass index (P=0.04; r=0.12), FEV1 (P=0.04; r=-0.12) and GOLD stage (0.002). Similarly, protein intake was significantly correlated with LMI (P=0.001; r=0.11), body mass index (P=0.02; r=0.16), FEV1(%) (P=0.001; r=-0.16) and GOLD stage (P=0.002). CONCLUSION Undernutrition in COPD is caused by decreased food intake and increased resting energy expenditure. Adequate intakes of glucose, protein, fibers, vitamins and zinc are associated with improved ventilatory function.
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Affiliation(s)
- A Hedhli
- Service de pneumologie, faculté de médecine de Tunis, université Tunis El Manar, CHU la Rabta, rue Jbel Lakhdar La Rabta, LR18SP02, 1007 Tunis, Tunisie
| | - A Slim
- Service de pneumologie, faculté de médecine de Tunis, université Tunis El Manar, CHU la Rabta, rue Jbel Lakhdar La Rabta, LR18SP02, 1007 Tunis, Tunisie.
| | - M Mjid
- Service de pneumologie, faculté de médecine de Tunis, université Tunis El Manar, CHU la Rabta, rue Jbel Lakhdar La Rabta, LR18SP02, 1007 Tunis, Tunisie
| | - Y Ouachi
- Service de pneumologie, faculté de médecine de Tunis, université Tunis El Manar, CHU la Rabta, rue Jbel Lakhdar La Rabta, LR18SP02, 1007 Tunis, Tunisie
| | - M Kacem
- Service de pneumologie, faculté de médecine de Tunis, université Tunis El Manar, CHU la Rabta, rue Jbel Lakhdar La Rabta, LR18SP02, 1007 Tunis, Tunisie
| | - S Cheikh Rouhou
- Service de pneumologie, faculté de médecine de Tunis, université Tunis El Manar, CHU la Rabta, rue Jbel Lakhdar La Rabta, LR18SP02, 1007 Tunis, Tunisie
| | - S Merai
- Service de pneumologie, faculté de médecine de Tunis, université Tunis El Manar, CHU la Rabta, rue Jbel Lakhdar La Rabta, LR18SP02, 1007 Tunis, Tunisie
| | - S Toujani
- Service de pneumologie, faculté de médecine de Tunis, université Tunis El Manar, CHU la Rabta, rue Jbel Lakhdar La Rabta, LR18SP02, 1007 Tunis, Tunisie
| | - B Dhahri
- Service de pneumologie, faculté de médecine de Tunis, université Tunis El Manar, CHU la Rabta, rue Jbel Lakhdar La Rabta, LR18SP02, 1007 Tunis, Tunisie
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18
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Sambon M, Wins P, Bettendorff L. Neuroprotective Effects of Thiamine and Precursors with Higher Bioavailability: Focus on Benfotiamine and Dibenzoylthiamine. Int J Mol Sci 2021; 22:ijms22115418. [PMID: 34063830 PMCID: PMC8196556 DOI: 10.3390/ijms22115418] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/10/2021] [Accepted: 05/18/2021] [Indexed: 11/25/2022] Open
Abstract
Thiamine (vitamin B1) is essential for brain function because of the coenzyme role of thiamine diphosphate (ThDP) in glucose and energy metabolism. In order to compensate thiamine deficiency, several thiamine precursors with higher bioavailability were developed since the 1950s. Among these, the thioester benfotiamine (BFT) has been extensively studied and has beneficial effects both in rodent models of neurodegeneration and in human clinical studies. BFT has antioxidant and anti-inflammatory properties that seem to be mediated by a mechanism independent of the coenzyme function of ThDP. BFT has no adverse effects and improves cognitive outcome in patients with mild Alzheimer’s disease (AD). Recent in vitro studies show that another thiamine thioester, dibenzoylthiamine (DBT) is even more efficient that BFT, especially with respect to its anti-inflammatory potency. Thiamine thioesters have pleiotropic properties linked to an increase in circulating thiamine concentrations and possibly in hitherto unidentified metabolites in particular open thiazole ring derivatives. The identification of the active neuroprotective derivatives and the clarification of their mechanism of action open extremely promising perspectives in the field of neurodegenerative, neurodevelopmental and psychiatric conditions.
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Abstract
Beriberi is a nutritional complication of gastric surgery, caused by deficiency of vitamin B1, or thiamine. Thiamine deficiency leads to impaired glucose metabolism, decreased delivery of oxygen by red blood cells, cardiac dysfunction, failure of neurotransmission, and neuronal death. This review describes the history and pathophysiology of beriberi as well as the relationship between beriberi and nutritional deficiencies after gastric surgery. A literature review of the history and pathophysiology of beriberi and the risk factors for thiamine deficiency, particularly after gastric resection or bariatric surgery, was performed. Recommendations for nutritional follow-up post gastric surgery are based on current national guidelines. Patients may have subclinical thiamine deficiency after upper gastrointestinal surgery, and thus beriberi may be precipitated by acute illness such as sepsis or poor dietary intake. This may occur very soon or many years after gastrectomy or bariatric surgery, even in apparently well-nourished patients. Prompt recognition and administration of supplemental thiamine can decrease morbidity and mortality in patients with beriberi. Dietary education post surgery and long-term follow-up to determine nutritional status, including vitamin and mineral assessment, is recommended for patients who undergo gastric surgery.
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Affiliation(s)
- Robert Beaumont Wilson
- Upper Gastrointestinal Surgery Department, University of New South Wales, Liverpool Public Hospital, Liverpool, Sydney, New South Wales, Australia, and the Sydney Institute for Obesity Surgery, Ashfield, Sydney, New South Wales, Australia
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20
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Spooner DE, Honeyfield DC, Boggs K, Shull D, Wertz T, Sweet S. An Assessment of the Thiamine Status of Smallmouth Bass (Micropterus dolomieu) in the Susquehanna River Watershed. Northeast Nat (Steuben) 2020. [DOI: 10.1656/045.027.0401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Daniel E. Spooner
- Department of Biology, Lock Haven University, 301 W. Church Street, Lock Haven, PA 17745
| | - Dale C. Honeyfield
- United States Geological Survey, Northern Appalachian Research Branch, 176 Straight Run Road, Wellsboro, PA 16901
| | - Kristin Boggs
- United States Geological Survey, Northern Appalachian Research Branch, 176 Straight Run Road, Wellsboro, PA 16901
| | - Dustin Shull
- Department of Environmental Protection, Bureau of Clean Water, Rachel Carson Building, Harrisburg, PA 17105
| | - Tim Wertz
- Department of Environmental Protection, Bureau of Clean Water, Rachel Carson Building, Harrisburg, PA 17105
| | - Stephanie Sweet
- United States Geological Survey, Northern Appalachian Research Branch, 176 Straight Run Road, Wellsboro, PA 16901
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21
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Wang C, Zhang S, Zou Y, Ma H, Jiang D, Sheng L, Sang S, Jin L, Guan Y, Gui Y, Xu Z, Zhong C. A novel PET tracer 18F-deoxy-thiamine: synthesis, metabolic kinetics, and evaluation on cerebral thiamine metabolism status. EJNMMI Res 2020; 10:126. [PMID: 33079296 PMCID: PMC7575681 DOI: 10.1186/s13550-020-00710-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 09/24/2020] [Indexed: 11/27/2022] Open
Abstract
Background Some neuropsychological diseases are associated with abnormal thiamine metabolism, including Korsakoff–Wernicke syndrome and Alzheimer’s disease. However, in vivo detection of the status of brain thiamine metabolism is still unavailable and needs to be developed. Methods A novel PET tracer of 18F-deoxy-thiamine was synthesized using an automated module via a two-step route. The main quality control parameters, such as specific activity and radiochemical purity, were evaluated by high-performance liquid chromatography (HPLC). Radiochemical concentration was determined by radioactivity calibrator. Metabolic kinetics and the level of 18F-deoxy-thiamine in brains of mice and marmosets were studied by micro-positron emission tomography/computed tomography (PET/CT). In vivo stability, renal excretion rate, and biodistribution of 18F-deoxy-thiamine in the mice were assayed using HPLC and γ-counter, respectively. Also, the correlation between the retention of cerebral 18F-deoxy-thiamine in 60 min after injection as represented by the area under the curve (AUC) and blood thiamine levels was investigated. Results The 18F-deoxy-thiamine was stable both in vitro and in vivo. The uptake and clearance of 18F-deoxy-thiamine were quick in the mice. It reached the max standard uptake value (SUVmax) of 4.61 ± 0.53 in the liver within 1 min, 18.67 ± 7.04 in the kidney within half a minute. The SUV dropped to 0.72 ± 0.05 and 0.77 ± 0.35 after 60 min of injection in the liver and kidney, respectively. After injection, kidney, liver, and pancreas exhibited high accumulation level of 18F-deoxy-thiamine, while brain, muscle, fat, and gonad showed low accumulation concentration, consistent with previous reports on thiamine distribution in mice. Within 90 min after injection, the level of 18F-deoxy-thiamine in the brain of C57BL/6 mice with thiamine deficiency (TD) was 1.9 times higher than that in control mice, and was 3.1 times higher in ICR mice with TD than that in control mice. The AUC of the tracer in the brain of marmosets within 60 min was 29.33 ± 5.15 and negatively correlated with blood thiamine diphosphate levels (r = − 0.985, p = 0.015). Conclusion The 18F-deoxy-thiamine meets the requirements for ideal PET tracer for in vivo detecting the status of cerebral thiamine metabolism.
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Affiliation(s)
- Changpeng Wang
- Department of Neurology, Zhongshan Hospital, State Key Laboratory of Medical Neurobiology and Institute of Brain Science, Fudan University, Shanghai, 200032, China
| | - Siwei Zhang
- Jiangsu Huayi Technology Co., Ltd., Jiangsu, 215519, China
| | - Yuefei Zou
- Jiangsu Huayi Technology Co., Ltd., Jiangsu, 215519, China
| | - Hongzhao Ma
- Jiangsu Huayi Technology Co., Ltd., Jiangsu, 215519, China
| | - Donglang Jiang
- PET Center, Huashan Hospital, Fudan University, Shanghai, 200235, China
| | - Lei Sheng
- Department of Clinical Pharmacology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Shaoming Sang
- Department of Neurology, Zhongshan Hospital, State Key Laboratory of Medical Neurobiology and Institute of Brain Science, Fudan University, Shanghai, 200032, China
| | - Lirong Jin
- Department of Neurology, Zhongshan Hospital, State Key Laboratory of Medical Neurobiology and Institute of Brain Science, Fudan University, Shanghai, 200032, China
| | - Yihui Guan
- PET Center, Huashan Hospital, Fudan University, Shanghai, 200235, China
| | - Yuan Gui
- Jiangsu Huayi Technology Co., Ltd., Jiangsu, 215519, China
| | - Zhihong Xu
- Jiangsu Huayi Technology Co., Ltd., Jiangsu, 215519, China
| | - Chunjiu Zhong
- Department of Neurology, Zhongshan Hospital, State Key Laboratory of Medical Neurobiology and Institute of Brain Science, Fudan University, Shanghai, 200032, China.
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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: 16] [Impact Index Per Article: 4.0] [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.
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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;
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Inactivation of bacteria in plasma by photosensitizers benzophenone and vitamins K3, B1 and B6 with UV A light irradiation. Photodiagnosis Photodyn Ther 2020; 30:101713. [DOI: 10.1016/j.pdpdt.2020.101713] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 03/06/2020] [Indexed: 11/22/2022]
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Role of the Synthetic B1 Vitamin Sulbutiamine on Health. J Nutr Metab 2020; 2020:9349063. [PMID: 32399290 PMCID: PMC7210561 DOI: 10.1155/2020/9349063] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 02/04/2020] [Indexed: 02/06/2023] Open
Abstract
Sulbutiamine is a thiamine derivative developed in Japan in the mid-60's as a beriberi treatment drug. Since then, different potential applications have been described. For instance, there is some evidence that sulbutiamine can have anti-fatigue, nootropic, and antioxidant effects, which led to its use as a sport supplement (although some authors argue it is actually a masking doping strategy). Moreover, this molecule has been proposed as a possible treatment for some microsporidial infections and even for certain types of cancer. Despite these potential effects, sulbutiamine is still a relatively unknown molecule, which justifies the present review, where we discuss its history and the existing literature on its health applications. We conclude that there is a great potential for sulbutiamine use, well beyond its first described function (to increase thiamine tissue concentration). Indeed, new mechanisms of action have been found, mainly associated with its derivatives. Nevertheless, and although the research on sulbutiamine started 50 years ago, only a limited number of studies were conducted during this time frame. As so, methodological concerns need to be addressed and new studies are necessary, especially randomized controlled trials. Only then will the full potential of this versatile molecule be identified.
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Kim T, Choi H, Kim J. Association Between Dietary Nutrient Intake and Chronic Obstructive Pulmonary Disease Severity: A Nationwide Population-Based Representative Sample. COPD 2019; 17:49-58. [PMID: 31833439 DOI: 10.1080/15412555.2019.1698530] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Several nutrients have been suggested to protect against airway destruction via antioxidant activity. The present study aimed to evaluate the association between disease severity and dietary nutrient intake in chronic obstructive pulmonary disease (COPD) patients using the Korea National Health and Nutrition Examination Survey. Of the 22,948 participants, 702 patients (418 men and 284 women) with COPD, who were defined as the fifth percentile from a reference population were selected. The severity of airflow limitation was measured by the predicted percentage of forced expiratory volume in 1 second (FEV1%). The Jonckheere-Terpstra test was used to evaluate the dose-dependent association between nutrient intake and disease severity. Multivariate linear regression analysis was used to evaluate the relationship between dietary nutrient intake and predicted FEV1%. Vitamin A intake showed a positive association with FEV1% in men in a model adjusted for covariates. Carbohydrate, protein, fiber, thiamin, riboflavin, niacin, and vitamin C intake were significantly associated with decreased disease severity in elderly men (aged ≥60 years). On the contrary, statistical significance was not observed for all the nutrients in women. In conclusion, intake of carbohydrate, protein, fiber, thiamin, riboflavin, niacin, and vitamin C was associated with decreased severity of airway impairment in elderly men with COPD. Our results are in line with those of previous studies into the importance of nutritional status in airway disease. A longitudinal study is required to clarify the mechanisms underlying the association between dietary nutrient intake and COPD severity.
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Affiliation(s)
- Taeyun Kim
- Department of Pulmonology, Kosin University Gospel Hospital, Kosin University College of Medicine, Busan, South Korea
| | - Hyunji Choi
- Department of Laboratory Medicine, Kosin University Gospel Hospital, Kosin University College of Medicine, Busan, South Korea
| | - Jehun Kim
- Department of Pulmonology, Kosin University Gospel Hospital, Kosin University College of Medicine, Busan, South Korea
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Enterohemorrhagic Escherichia coli infection inhibits colonic thiamin pyrophosphate uptake via transcriptional mechanism. PLoS One 2019; 14:e0224234. [PMID: 31639155 PMCID: PMC6804999 DOI: 10.1371/journal.pone.0224234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 10/08/2019] [Indexed: 01/19/2023] Open
Abstract
Colonocytes possess a specific carrier-mediated uptake process for the microbiota-generated thiamin (vitamin B1) pyrophosphate (TPP) that involves the TPP transporter (TPPT; product of the SLC44A4 gene). Little is known about the effect of exogenous factors (including enteric pathogens) on the colonic TPP uptake process. Our aim in this study was to investigate the effect of Enterohemorrhagic Escherichia coli (EHEC) infection on colonic uptake of TPP. We used human-derived colonic epithelial NCM460 cells and mice in our investigation. The results showed that infecting NCM460 cells with live EHEC (but not with heat-killed EHEC, EHEC culture supernatant, or with non-pathogenic E. Coli) to lead to a significant inhibition in carrier-mediated TPP uptake, as well as in level of expression of the TPPT protein and mRNA. Similarly, infecting mice with EHEC led to a significant inhibition in colonic TPP uptake and in level of expression of TPPT protein and mRNA. The inhibitory effect of EHEC on TPP uptake by NCM460 was found to be associated with reduction in the rate of transcription of the SLC44A4 gene as indicated by the significant reduction in the activity of the SLC44A4 promoter transfected into EHEC infected cells. The latter was also associated with a marked reduction in the level of expression of the transcription factors CREB-1 and ELF3, which are known to drive the activity of the SLC44A4 promoter. Finally, blocking the ERK1/2 and NF-kB signaling pathways in NCM460 cells significantly reversed the level of EHEC inhibition in TPP uptake and TPPT expression. Collectively, these findings show, for the first time, that EHEC infection significantly inhibit colonic uptake of TPP, and that this effect appears to be exerted at the level of SLC44A4 transcription and involves the ERK1/2 and NF-kB signaling pathways.
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Identification of Copy Number Variation in Domestic Chicken Using Whole-Genome Sequencing Reveals Evidence of Selection in the Genome. Animals (Basel) 2019; 9:ani9100809. [PMID: 31618984 PMCID: PMC6826909 DOI: 10.3390/ani9100809] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 10/13/2019] [Accepted: 10/14/2019] [Indexed: 12/12/2022] Open
Abstract
Simple Summary Chickens have been bred for meat and egg production as a source of animal protein. With the increase of productivity as the main purpose of domestication, factors such as metabolism and immunity were boosted, which are detectable signs of selection on the genome. This study focused on copy number variation (CNV) to find evidence of domestication on the genome. CNV was detected from whole-genome sequencing of 65 chickens including Red Jungle Fowl, broilers, and layers. After that, CNV region, the overlapping region of CNV between individuals, was made to identify which genomic regions showed copy number differentiation. The 663 domesticated-specific CNV regions were associated with various functions such as metabolism and organ development. Also, by performing population differentiation analyses such as clustering analysis and ANOVA test, we found that there are a lot of genomic regions with different copy number patterns between broilers and layers. This result indicates that different genetic variations can be found, depending on the purpose of artificial selection and provides considerations for future animal breeding. Abstract Copy number variation (CNV) has great significance both functionally and evolutionally. Various CNV studies are in progress to find the cause of human disease and to understand the population structure of livestock. Recent advances in next-generation sequencing (NGS) technology have made CNV detection more reliable and accurate at whole-genome level. However, there is a lack of CNV studies on chickens using NGS. Therefore, we obtained whole-genome sequencing data of 65 chickens including Red Jungle Fowl, Cornish (broiler), Rhode Island Red (hybrid), and White Leghorn (layer) from the public databases for CNV region (CNVR) detection. Using CNVnator, a read-depth based software, a total of 663 domesticated-specific CNVRs were identified across autosomes. Gene ontology analysis of genes annotated in CNVRs showed that mainly enriched terms involved in organ development, metabolism, and immune regulation. Population analysis revealed that CN and RIR are closer to each other than WL, and many genes (LOC772271, OR52R1, RD3, ADH6, TLR2B, PRSS2, TPK1, POPDC3, etc.) with different copy numbers between breeds found. In conclusion, this study has helped to understand the genetic characteristics of domestic chickens at CNV level, which may provide useful information for the development of breeding systems in chickens.
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Coulbault L, Ritz L, Vabret F, Lannuzel C, Boudehent C, Nowoczyn M, Beaunieux H, Pitel AL. Thiamine and phosphate esters concentrations in whole blood and serum of patients with alcohol use disorder: a relation with cognitive deficits. Nutr Neurosci 2019; 24:530-541. [PMID: 31419185 DOI: 10.1080/1028415x.2019.1652438] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Background: In this study, we investigated (1) the effect of chronic and excessive alcohol consumption on whole blood (WB) and serum concentrations of thiamine and its metabolites after supplementation, and (2) the relationship between the perturbations of thiamine metabolism and neuropsychological abilities.Methods: WB and serum samples were collected in patients with Alcohol Use Disorder (AUD) and in healthy control subjects (after oral thiamine supplementation, or without supplementation). Thiamine (Th), thiamine monophosphate (TMP) and thiamine diphosphate (TDP) were quantified. The Brief Evaluation of Alcohol-Related Neuropsychological Impairments (BEARNI) and the Montreal Cognitive Assessment (MoCA) were performed by each AUD participant. Based on the BEARNI score, two groups of AUD patients were studied: AUD patients with no or mild cognitive impairment (AUD COG+), and AUD patients with moderate-to-severe cognitive impairment (AUD COG-).Results: In WB, Th concentrations were significantly higher, and percentages of phosphate esters of thiamine were significantly lower in AUD COG- patients compared to controls. In serum, Th concentrations were significantly higher in AUD COG- patients compared to controls. The percentage of Th in serum was significantly higher in AUD COG- patients compared to AUD COG+ patients, and to the groups of controls. When adjusted on education level, the percentage of Th in serum in AUD patients negatively correlated with the scores at BEARNI and MoCA, and Th concentration in serum negatively correlated with MoCA.Conclusions: These data support an impairment of metabolism and/or distribution of thiamine in AUD patients, and a relationship with the development of alcohol-related cognitive deficits.
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Affiliation(s)
- Laurent Coulbault
- Service de Biochimie, Centre Hospitalier Universitaire de Caen, Caen, France.,Normandie Univ, UNICAEN, Signalisation, électrophysiologie et imagerie des lésions d'ischémie-reperfusion myocardique, Caen, France
| | - Ludivine Ritz
- Normandie Univ, UNICAEN, PSL Université, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, Caen, France
| | - François Vabret
- Normandie Univ, UNICAEN, PSL Université, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, Caen, France.,Service d'Addictologie, Centre Hospitalier Universitaire de Caen, Caen, France
| | - Coralie Lannuzel
- Normandie Univ, UNICAEN, PSL Université, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, Caen, France.,Service d'Addictologie, Centre Hospitalier Universitaire de Caen, Caen, France
| | - Céline Boudehent
- Normandie Univ, UNICAEN, PSL Université, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, Caen, France.,Service d'Addictologie, Centre Hospitalier Universitaire de Caen, Caen, France
| | - Marie Nowoczyn
- Service de Biochimie, Centre Hospitalier Universitaire de Caen, Caen, France.,Normandie Univ, UNICAEN, Signalisation, électrophysiologie et imagerie des lésions d'ischémie-reperfusion myocardique, Caen, France
| | - Hélène Beaunieux
- Normandie Univ, UNICAEN, PSL Université, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, Caen, France
| | - Anne Lise Pitel
- Normandie Univ, UNICAEN, PSL Université, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, Caen, France
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Sambon M, Napp A, Demelenne A, Vignisse J, Wins P, Fillet M, Bettendorff L. Thiamine and benfotiamine protect neuroblastoma cells against paraquat and β-amyloid toxicity by a coenzyme-independent mechanism. Heliyon 2019; 5:e01710. [PMID: 31193162 PMCID: PMC6520661 DOI: 10.1016/j.heliyon.2019.e01710] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 02/21/2019] [Accepted: 05/08/2019] [Indexed: 01/22/2023] Open
Abstract
Background Benfotiamine (BFT) is a synthetic thiamine precursor with high bioavailability. It is efficient in treating complications of type 2 diabetes and has beneficial effects in mouse models of neurodegenerative diseases. The mechanism of action of BFT remains unknown, though it is sometimes suggested that it may be linked to increased thiamine diphosphate (ThDP) coenzyme function. Methods We used a mouse neuroblastoma cell line (Neuro2a) grown in thiamine-restricted medium. The cells were stressed by exposure to paraquat (PQ) or amyloid β1-42 peptide in the presence or absence of BFT and the cell survival was measured using the MTT method. In each case, BFT was compared with sulbutiamine (SuBT), an unrelated thiamine precursor, and thiamine. Metabolites of BFT were determined by HPLC and mass spectrometry. Results At 50 μM, BFT protects the cells against PQ and amyloid β1-42 peptide-induced toxicity with the same efficacy. Protective effects were also observed with SuBT and with higher concentrations of thiamine. The main metabolites of BFT were thiamine and S-benzoylthiamine (S-BT). Treatment with both precursors induces a strong increase in intracellular content of thiamine. Protective effects of BFT and SuBT are directly related to thiamine (but not ThDP) levels in Neuro2a cells. Conclusions BFT, SuBT and thiamine all protect the cells against oxidative stress, suggesting an antioxidant effect of thiamine. Our results are not in favor of a direct ROS scavenging effect of thiamine but rather an indirect effect possibly mediated by some antioxidant signaling pathway. It is however not clear whether this effect is due to thiamine itself, its thiol form or an unknown metabolite. General significance Our results suggest a role of thiamine in protection against oxidative stress, independent of the coenzyme function of thiamine diphosphate.
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Key Words
- ARE, antioxidant response element
- BFT, benfotiamine
- Cell biology
- FBS, fetal bovine serum
- Neuroscience
- O-BT, O-benzoylthiamine
- PQ, paraquat
- ROS, reactive oxygen species
- S-BT, S-benzoylthiamine
- SuBT, sulbutiamine
- TPK, thiamine pyrophosphokinase
- ThDP, thiamine diphosphate
- ThMP, thiamine monophosphate
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Affiliation(s)
- Margaux Sambon
- Laboratory of Neurophysiology, GIGA-Neurosciences, University of Liège, Liège, Belgium
| | - Aurore Napp
- Laboratory for the Analysis of Medicines, CIRM, Department of Pharmacy, University of Liège, Liège, Belgium
| | - Alice Demelenne
- Laboratory for the Analysis of Medicines, CIRM, Department of Pharmacy, University of Liège, Liège, Belgium
| | - Julie Vignisse
- Laboratory of Neurophysiology, GIGA-Neurosciences, University of Liège, Liège, Belgium
| | - Pierre Wins
- Laboratory of Neurophysiology, GIGA-Neurosciences, University of Liège, Liège, Belgium
| | - Marianne Fillet
- Laboratory for the Analysis of Medicines, CIRM, Department of Pharmacy, University of Liège, Liège, Belgium
| | - Lucien Bettendorff
- Laboratory of Neurophysiology, GIGA-Neurosciences, University of Liège, Liège, Belgium
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Huang J, Ma Z, Zhong G, Sheppard DC, Lu L, Zhang S. The mitochondrial thiamine pyrophosphate transporter TptA promotes adaptation to low iron conditions and virulence in fungal pathogen Aspergillus fumigatus. Virulence 2019; 10:234-247. [PMID: 30880633 PMCID: PMC6527022 DOI: 10.1080/21505594.2019.1596505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Aspergillus fumigatus is the most prevalent airborne fungal pathogen that causes invasive fungal infections in immunosuppressed individuals. Adaptation to iron limited conditions is crucial for A. fumigatus virulence. To identify novel genes that play roles in adaptation to low iron conditions we performed an insertional mutagenesis screen in A. fumigatus. Using this approach, we identified the tptA gene in A. fumigatus, which shares homology with the Saccharomyces cerevisiae thiamine pyrophosphate (ThPP) transporter encoding gene tpc1. Heterologous expression of tpc1 in the tptA deletion mutant completely restored the ThPP auxotrophy phenotype, suggesting that Tpc1 and TptA are functional orthologues. Importantly, TptA was required for adaptation to low iron conditions in A. fumigatus. The ΔtptA mutant had decreased resistance to the iron chelator bathophenanthroline disulfonate (BPS) with severe growth defects. Moreover, loss of tptA decreased the expression of hapX, which is a major transcription factor indispensable for adaptation to iron starvation in A. fumigatus. Overexpression of hapX in the ΔtptA strain greatly rescued the growth defect and siderophore production by A. fumigatus in iron-depleted conditions. Mutagenesis experiments demonstrated that the conserved residues related to ThPP uptake in TptA were also required for low iron adaptation. Furthermore, TptA-mediated adaptation to low iron conditions was found to be dependent on carbon sources. Finally, loss of tptA resulted in the attenuation of virulence in a murine model of aspergillosis. Taken together, this study demonstrated that the mitochondrial ThPP transporter TptA promotes low iron adaptation and virulence in A. fumigatus.
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Affiliation(s)
- Jingjing Huang
- a Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Microbiology, College of Life Sciences , Nanjing Normal University , Nanjing , China
| | - Zhihua Ma
- a Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Microbiology, College of Life Sciences , Nanjing Normal University , Nanjing , China
| | - Guowei Zhong
- b Department of Hygiene Analysis and Detection, School of Public Health , Nanjing Medical University , Nanjing , China
| | - Donald C Sheppard
- c Departments of Medicine, Microbiology & Immunology , McGill University , Montréal , QC , Canada.,d Infectious Diseases and Immunity in Global Health Program , Research Institute of the McGill University Health Centre , Montreal , QC , Canada
| | - Ling Lu
- a Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Microbiology, College of Life Sciences , Nanjing Normal University , Nanjing , China
| | - Shizhu Zhang
- a Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Microbiology, College of Life Sciences , Nanjing Normal University , Nanjing , China
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Evliyaoglu O, van Helden J, Imöhl M, Weiskirchen R. Vitamin B1 interpretation: Erroneous higher levels in non-anemic populations. Nutrition 2019; 60:25-29. [DOI: 10.1016/j.nut.2018.09.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 08/14/2018] [Accepted: 09/03/2018] [Indexed: 02/06/2023]
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32
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Mordhorst S, Singh J, Mohr MKF, Hinkelmann R, Keppler M, Jessen HJ, Andexer JN. Several Polyphosphate Kinase 2 Enzymes Catalyse the Production of Adenosine 5'-Polyphosphates. Chembiochem 2019; 20:1019-1022. [PMID: 30549179 DOI: 10.1002/cbic.201800704] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Indexed: 11/08/2022]
Abstract
Polyphosphate kinases (PPKs) are involved in many metabolic processes; enzymes of the second family (PPK2) are responsible for nucleotide synthesis fuelled by the consumption of inorganic polyphosphate. They catalyse the phosphorylation of nucleotides with various numbers of phosphate residues, such as monophosphates or diphosphates. Hence, these enzymes are promising candidates for cofactor regeneration systems. Besides adenosine 5'-triphosphate, PPK2s also catalyse the synthesis of highly phosphorylated nucleotides in vitro, as shown here for adenosine 5'-tetraphosphate and adenosine 5'-pentaphosphate. These unusually phosphorylated adenosine 5'-polyphosphates add up to 50 % of the whole adenosine nucleotides in the assay. The two new products were chemically synthesised to serve as standards and compared with the two enzymatically produced compounds by high-performance ion chromatography and 31 P NMR analysis. This study shows that PPK2s are highly suitable for biocatalytic synthesis of different phosphorylated nucleotides.
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Affiliation(s)
- Silja Mordhorst
- Institute of Pharmaceutical Sciences, University of Freiburg, Albertstrasse 25, 79104, Freiburg, Germany
| | - Jyoti Singh
- Institute of Organic Chemistry, University of Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
| | - Michael K F Mohr
- Institute of Pharmaceutical Sciences, University of Freiburg, Albertstrasse 25, 79104, Freiburg, Germany
| | - Rahel Hinkelmann
- Institute of Organic Chemistry, University of Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
| | - Michael Keppler
- Institute of Pharmaceutical Sciences, University of Freiburg, Albertstrasse 25, 79104, Freiburg, Germany
| | - Henning J Jessen
- Institute of Organic Chemistry, University of Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
| | - Jennifer N Andexer
- Institute of Pharmaceutical Sciences, University of Freiburg, Albertstrasse 25, 79104, Freiburg, Germany
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Nosaka K, Uchiyama R, Tadano K, Endo Y, Hayashi M, Konno H, Mimuro H. Thiamin transport in Helicobacter pylori lacking the de novo synthesis of thiamin. MICROBIOLOGY-SGM 2019; 165:224-232. [PMID: 30620266 DOI: 10.1099/mic.0.000765] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Helicobacter pylori lacks the genes involved in the de novo synthesis of thiamin, and is therefore a thiamin auxotroph. The PnuT transporter, a member of the Pnu transporter family, mediates the uptake of thiamin across the membrane. In the genome of H. pylori, the pnuT gene is clustered with the thiamin pyrophosphokinase gene thi80. In this study, we found that [3H]thiamin is incorporated into the H. pylori SS1 strain via facilitated diffusion with a Km value of 28 µM. The incorporation of radioactive thiamin was inhibited to some extent by 2-methyl-4-amino-5-hydroxymethylpyrimidine or pyrithiamine, but was largely unaffected by thiamin phosphate or thiamin pyrophosphate. RT-PCR analysis demonstrated that the pnuT and thi80 genes are cotranscribed as a single transcript. The estimated Km value for thiamin in the thiamin pyrophosphokinase activity exerted by the recombinant Thi80 protein was 0.40 µM, which is much lower than the Km value of thiamin transport in H. pylori cells. These findings suggested that the incorporated thiamin from the environment is efficiently trapped by pyrophosphorylation to make the transport directional. In addition, the thiamin transport activity in the pnuT-deficient H. pylori strain was less than 20 % of that in the wild-type strain at extracellular thiamin concentration of 1 µM, but the incorporated scintillation signals of the pnuT-deficient strain with 100 nM [3H]thiamin were nearly at the background level. We also found that the pnuT-deficient strain required 100-times more thiamin to achieve growth equal to that of the wild-type. These findings reflect the presence of multiple routes for entry of thiamin into H. pylori, and PnuT is likely responsible for the high-affinity thiamin transport and serves as a target for antimicrobial agents against H. pylori.
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Affiliation(s)
- Kazuto Nosaka
- 12nd Department of Biochemistry, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, Nishinomiya, Japan
| | - Ryosuke Uchiyama
- 12nd Department of Biochemistry, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, Nishinomiya, Japan
| | - Kyo Tadano
- 12nd Department of Biochemistry, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, Nishinomiya, Japan
| | - Yurina Endo
- 12nd Department of Biochemistry, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, Nishinomiya, Japan
| | - Maria Hayashi
- 12nd Department of Biochemistry, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, Nishinomiya, Japan
| | - Hiroyuki Konno
- 2Department of Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University, Yonezawa, Japan
| | - Hitomi Mimuro
- 3Department of Infection Microbiology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan.,4Division of Bacteriology, International Research Center for Infectious Diseases, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
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34
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Whitfield KC, Bourassa MW, Adamolekun B, Bergeron G, Bettendorff L, Brown KH, Cox L, Fattal‐Valevski A, Fischer PR, Frank EL, Hiffler L, Hlaing LM, Jefferds ME, Kapner H, Kounnavong S, Mousavi MP, Roth DE, Tsaloglou M, Wieringa F, Combs GF. Thiamine deficiency disorders: diagnosis, prevalence, and a roadmap for global control programs. Ann N Y Acad Sci 2018; 1430:3-43. [PMID: 30151974 PMCID: PMC6392124 DOI: 10.1111/nyas.13919] [Citation(s) in RCA: 153] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 06/05/2018] [Indexed: 12/20/2022]
Abstract
Thiamine is an essential micronutrient that plays a key role in energy metabolism. Many populations worldwide may be at risk of clinical or subclinical thiamine deficiencies, due to famine, reliance on staple crops with low thiamine content, or food preparation practices, such as milling grains and washing milled rice. Clinical manifestations of thiamine deficiency are variable; this, along with the lack of a readily accessible and widely agreed upon biomarker of thiamine status, complicates efforts to diagnose thiamine deficiency and assess its global prevalence. Strategies to identify regions at risk of thiamine deficiency through proxy measures, such as analysis of food balance sheet data and month-specific infant mortality rates, may be valuable for understanding the scope of thiamine deficiency. Urgent public health responses are warranted in high-risk regions, considering the contribution of thiamine deficiency to infant mortality and research suggesting that even subclinical thiamine deficiency in childhood may have lifelong neurodevelopmental consequences. Food fortification and maternal and/or infant thiamine supplementation have proven effective in raising thiamine status and reducing the incidence of infantile beriberi in regions where thiamine deficiency is prevalent, but trial data are limited. Efforts to determine culturally and environmentally appropriate food vehicles for thiamine fortification are ongoing.
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Affiliation(s)
- Kyly C. Whitfield
- Department of Applied Human NutritionMount Saint Vincent UniversityHalifaxNova ScotiaCanada
| | - Megan W. Bourassa
- The Sackler Institute for Nutrition ScienceThe New York Academy of SciencesNew YorkNew York
| | - Bola Adamolekun
- University of Tennessee Health Science CenterMemphisTennessee
| | - Gilles Bergeron
- The Sackler Institute for Nutrition ScienceThe New York Academy of SciencesNew YorkNew York
| | - Lucien Bettendorff
- Laboratory of Neurophysiology, GIGA‐NeurosciencesUniversity of LiègeLiègeBelgium
| | | | - Lorna Cox
- Medical Research Council Elsie Widdowson LaboratoryCambridgeUnited Kingdom
| | - Aviva Fattal‐Valevski
- Tel Aviv Medical Center, Dana‐Dwek Children's Hospital, Sackler Faculty of MedicineTel Aviv UniversityTel AvivIsrael
| | | | | | | | - Lwin Mar Hlaing
- National Nutrition Center, Ministry of Health and SportsMyanmar
| | | | | | - Sengchanh Kounnavong
- The Lao Tropical and Public Health Institute, Ministry of HealthVientianeLao PDR
| | - Maral P.S. Mousavi
- Department of Chemistry and Chemical BiologyHarvard UniversityCambridgeMassachusetts
| | - Daniel E. Roth
- Hospital for Sick Children and University of TorontoTorontoOntarioCanada
| | | | - Frank Wieringa
- Institut de Recherche pour le DeveloppmentMontpellierFrance
| | - Gerald F. Combs
- Jean Mayer USDA Human Nutrition Research CenterTufts UniversityBostonMassachusetts
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Tapias V, Jainuddin S, Ahuja M, Stack C, Elipenahli C, Vignisse J, Gerges M, Starkova N, Xu H, Starkov AA, Bettendorff L, Hushpulian DM, Smirnova NA, Gazaryan IG, Kaidery NA, Wakade S, Calingasan NY, Thomas B, Gibson GE, Dumont M, Beal MF. Benfotiamine treatment activates the Nrf2/ARE pathway and is neuroprotective in a transgenic mouse model of tauopathy. Hum Mol Genet 2018; 27:2874-2892. [PMID: 29860433 PMCID: PMC6077804 DOI: 10.1093/hmg/ddy201] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 04/26/2018] [Accepted: 05/01/2018] [Indexed: 12/21/2022] Open
Abstract
Impaired glucose metabolism, decreased levels of thiamine and its phosphate esters, and reduced activity of thiamine-dependent enzymes, such as pyruvate dehydrogenase, alpha-ketoglutarate dehydrogenase and transketolase occur in Alzheimer's disease (AD). Thiamine deficiency exacerbates amyloid beta (Aβ) deposition, tau hyperphosphorylation and oxidative stress. Benfotiamine (BFT) rescued cognitive deficits and reduced Aβ burden in amyloid precursor protein (APP)/PS1 mice. In this study, we examined whether BFT confers neuroprotection against tau phosphorylation and the generation of neurofibrillary tangles (NFTs) in the P301S mouse model of tauopathy. Chronic dietary treatment with BFT increased lifespan, improved behavior, reduced glycated tau, decreased NFTs and prevented death of motor neurons. BFT administration significantly ameliorated mitochondrial dysfunction and attenuated oxidative damage and inflammation. We found that BFT and its metabolites (but not thiamine) trigger the expression of Nrf2/antioxidant response element (ARE)-dependent genes in mouse brain as well as in wild-type but not Nrf2-deficient fibroblasts. Active metabolites were more potent in activating the Nrf2 target genes than the parent molecule BFT. Docking studies showed that BFT and its metabolites (but not thiamine) bind to Keap1 with high affinity. These findings demonstrate that BFT activates the Nrf2/ARE pathway and is a promising therapeutic agent for the treatment of diseases with tau pathology, such as AD, frontotemporal dementia and progressive supranuclear palsy.
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Affiliation(s)
- Victor Tapias
- Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - Shari Jainuddin
- Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - Manuj Ahuja
- Department of Pharmacology, Toxicology and Neurology, Augusta University, Augusta, GA 30912, USA
| | - Cliona Stack
- Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - Ceyhan Elipenahli
- Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - Julie Vignisse
- Laboratory of Neurophysiology, GIGA-Neurosciences, University of Liege, 4000 Liege, Belgium
| | - Meri Gerges
- Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - Natalia Starkova
- Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - Hui Xu
- Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - Anatoly A Starkov
- Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - Lucien Bettendorff
- Laboratory of Neurophysiology, GIGA-Neurosciences, University of Liege, 4000 Liege, Belgium
| | - Dmitry M Hushpulian
- D. Rogachev Federal Scientific and Clinical Center for Pediatric Hematology, Oncology, and Immunology, 117997 Moscow, Russia
- Veropharm, Abbott EPD, 115088 Moscow, Russia
| | - Natalya A Smirnova
- D. Rogachev Federal Scientific and Clinical Center for Pediatric Hematology, Oncology, and Immunology, 117997 Moscow, Russia
| | - Irina G Gazaryan
- Department of Chemistry and Physical Sciences, Pace University, Pleasantville, NY 10570, USA
- Department of Enzymology, School of Chemistry, 119991 Moscow, Russia
| | - Navneet A Kaidery
- Department of Pharmacology, Toxicology and Neurology, Augusta University, Augusta, GA 30912, USA
| | - Sushama Wakade
- Department of Pharmacology, Toxicology and Neurology, Augusta University, Augusta, GA 30912, USA
| | - Noel Y Calingasan
- Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - Bobby Thomas
- Department of Pharmacology, Toxicology and Neurology, Augusta University, Augusta, GA 30912, USA
| | - Gary E Gibson
- Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
- Burke Medical Research Institute, Weill Cornell Medicine, White Plains, NY 10605, USA
| | - Magali Dumont
- Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - M Flint Beal
- Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
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36
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Thiamine and selected thiamine antivitamins - biological activity and methods of synthesis. Biosci Rep 2018; 38:BSR20171148. [PMID: 29208764 PMCID: PMC6435462 DOI: 10.1042/bsr20171148] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 11/13/2017] [Accepted: 12/04/2017] [Indexed: 12/22/2022] Open
Abstract
Thiamine plays a very important coenzymatic and non-coenzymatic role in the regulation of basic metabolism. Thiamine diphosphate is a coenzyme of many enzymes, most of which occur in prokaryotes. Pyruvate dehydrogenase and 2-oxoglutarate dehydrogenase complexes as well as transketolase are the examples of thiamine-dependent enzymes present in eukaryotes, including human. Therefore, thiamine is considered as drug or diet supplement which can support the treatment of many pathologies including neurodegenerative and vascular system diseases. On the other hand, thiamine antivitamins, which can interact with thiamine-dependent enzymes impeding their native functions, thiamine transport into the cells or a thiamine diphosphate synthesis, are good propose to drug design. The development of organic chemistry in the last century allowed the synthesis of various thiamine antimetabolites such as amprolium, pyrithiamine, oxythiamine, or 3-deazathiamine. Results of biochemical and theoretical chemistry research show that affinity to thiamine diphosphate-dependent enzymes of these synthetic molecules exceeds the affinity of native coenzyme. Therefore, some of them have already been used in the treatment of coccidiosis (amprolium), other are extensively studied as cytostatics in the treatment of cancer or fungal infections (oxythiamine and pyrithiamine). This review summarizes the current knowledge concerning the synthesis and mechanisms of action of selected thiamine antivitamins and indicates the potential of their practical use.
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37
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38
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Muroya S, Oe M, Ojima K. Thiamine accumulation and thiamine triphosphate decline occur in parallel with ATP exhaustion during postmortem aging of pork muscles. Meat Sci 2017; 137:228-234. [PMID: 29223015 DOI: 10.1016/j.meatsci.2017.11.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 10/24/2017] [Accepted: 11/30/2017] [Indexed: 12/18/2022]
Abstract
We aimed to clarify the mechanisms affecting postmortem thiamine and its phosphoester contents in major edible pork muscles, namely the longissimus lumborum (LL) in addition to vastus intermedius (VI). Metabolomic analysis by capillary electrophoresis-time of flight mass spectrometry revealed that the level of thiamine triphosphate (ThTP), approximately 1.8-fold higher in LL than in VI muscle at 0h postmortem, declined in the first 24hrs, resulting in an undetectable level at 168h postmortem in both muscles. In contrast, the thiamine content in both muscles increased after 24h postmortem during the aging process. The thiamine accumulation and ThTP decline progressed in parallel with a drastic reduction of the ATP level. The intermuscular differences in pH at 24h and in expression of thiamine transporter and thiamine pyrophosphokinase might result in delayed thiamine generation in LL. These results suggest that postmortem ATP exhaustion forced ThTP hydrolysis and further depyrophosphorylation of thiamine diphosphate in the porcine muscles, which resulted in thiamine accumulation.
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Affiliation(s)
- S Muroya
- Muscle Biology Research Unit, Animal Products Research Division, NARO Institute of Livestock and Grassland Science, Tsukuba, Ibaraki 305-0901, Japan.
| | - M Oe
- Muscle Biology Research Unit, Animal Products Research Division, NARO Institute of Livestock and Grassland Science, Tsukuba, Ibaraki 305-0901, Japan
| | - K Ojima
- Muscle Biology Research Unit, Animal Products Research Division, NARO Institute of Livestock and Grassland Science, Tsukuba, Ibaraki 305-0901, Japan
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39
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Anandam KY, Srinivasan P, Subramanian VS, Said HM. Molecular mechanisms involved in the adaptive regulation of the colonic thiamin pyrophosphate uptake process. Am J Physiol Cell Physiol 2017; 313:C655-C663. [PMID: 28931541 DOI: 10.1152/ajpcell.00169.2017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A considerable amount of the thiamin generated by gut microbiota exists in the form of thiamin pyrophosphate (TPP). We have previously shown that human colonocytes possess an efficient carrier-mediated uptake process for TPP that involves the SLC44A4 system and this uptake process is adaptively regulated by prevailing extracellular TPP level. Little is known about the molecular mechanisms that mediate this adaptive regulation. We addressed this issue using human-derived colonic epithelial NCM460 cells and mouse colonoids as models. Maintaining NCM460 cells in the presence of a high level of TPP (1 mM) for short (2 days)- and long-term (9 days) periods was found to lead to a significant reduction in [3H] TPP uptake compared with cells maintained in its absence. Short-term exposure showed no changes in level of expression of SLC44A4 protein in total cell homogenate (although there was a decreased expression in the membrane fraction), mRNA, and promoter activity. However, a significant reduction in the level of expression of the SLC44A4 protein, mRNA, and promoter activity was observed upon long-term maintenance with the substrate. Similar changes in Slc44a4 mRNA expression were observed when mouse colonoids were maintained with TPP for short- and long-term periods. Expression of the transcription factors ELF3 and CREB-1 (which drive the SLC44A4 promoter) following long-term exposure was unchanged, but their binding affinity to the promoter was decreased and specific histone modifications were also observed. These studies demonstrate that, depending on the period of exposure, different mechanisms are involved in the adaptive regulation of colonic TPP uptake by extracellular substrate level.
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Affiliation(s)
- Kasin Yadunandam Anandam
- Department of Medical Research, VA Medical Center , Long Beach, California.,Departments of Medicine and Physiology/Biophysics, University of California School of Medicine , Irvine, California
| | - Padmanabhan Srinivasan
- Department of Medical Research, VA Medical Center , Long Beach, California.,Departments of Medicine and Physiology/Biophysics, University of California School of Medicine , Irvine, California
| | - Veedamali S Subramanian
- Department of Medical Research, VA Medical Center , Long Beach, California.,Departments of Medicine and Physiology/Biophysics, University of California School of Medicine , Irvine, California
| | - Hamid M Said
- Department of Medical Research, VA Medical Center , Long Beach, California.,Departments of Medicine and Physiology/Biophysics, University of California School of Medicine , Irvine, California
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40
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Determination of the native forms of vitamin B1 in bovine milk using a fast and simplified UHPLC method. Food Chem 2017; 229:452-457. [DOI: 10.1016/j.foodchem.2017.02.092] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 12/05/2016] [Accepted: 02/17/2017] [Indexed: 11/20/2022]
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41
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Recent trends in determination of thiamine and its derivatives in clinical practice. J Chromatogr A 2017; 1510:1-12. [DOI: 10.1016/j.chroma.2017.06.048] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2017] [Revised: 06/14/2017] [Accepted: 06/15/2017] [Indexed: 02/06/2023]
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Thiamine metabolism is critical for regulating correlated growth of dendrite arbors and neuronal somata. Sci Rep 2017; 7:5342. [PMID: 28706281 PMCID: PMC5509691 DOI: 10.1038/s41598-017-05476-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 05/30/2017] [Indexed: 12/21/2022] Open
Abstract
Thiamine is critical for cellular function, as its phosphorylated and active form, thiamine diphosphate (TDP), acts as coenzyme for three key enzymes in glucose metabolism. Mutations in thiamine transporter, TDP synthesizing enzyme or carrier, including solute carrier family 19 member 3 (SLC19A3), thiamine pyrophosphokinase (TPK1) and solute carrier family 25 member 19 (SLC25A19), have been associated with developmental neurological disorders, including microcephaly and Leigh syndrome. However, little is known about how thiamine metabolism regulates neuronal morphology at the cellular level. Here, using primary rat hippocampal neuronal cultures, we showed that reducing the expression of Tpk1, Slc25a19 or Slc19a3 in individual neurons significantly reduced dendrite complexity, as measured by total dendritic branch tip number (TDBTN) and total dendritic branch length (TDBL). The specificity of the RNAi effects were verified by overexpression of RNAi resistant human constructs. Importantly, changes in both TDBTN and TDBL tightly correlated with reduction in soma size, demonstrating coordinated regulation of soma and dendrite growth by thiamine. The requirement of thiamine metabolism for coordinated somata and dendrite growth is highly consistent with the microcephaly and neurodegenerative phenotypes observed in thiamine loss-of-function diseases.
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Bunik V, Aleshin V. Analysis of the Protein Binding Sites for Thiamin and Its Derivatives to Elucidate the Molecular Mechanisms of the Noncoenzyme Action of Thiamin (Vitamin B1). STUDIES IN NATURAL PRODUCTS CHEMISTRY 2017. [DOI: 10.1016/b978-0-444-63930-1.00011-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Turck D, Bresson J, Burlingame B, Dean T, Fairweather‐Tait S, Heinonen M, Hirsch‐Ernst KI, Mangelsdorf I, McArdle HJ, Naska A, Nowicka G, Pentieva K, Sanz Y, Siani A, Sjödin A, Stern M, Tomé D, Van Loveren H, Vinceti M, Willatts P, Lamberg‐Allardt C, Przyrembel H, Tetens I, Gudelj Rakic J, Ioannidou S, de Sesmaisons‐Lecarré A, Forss AC, Neuhäuser‐Berthold M. Dietary reference values for thiamin. EFSA J 2016. [DOI: 10.2903/j.efsa.2016.4653] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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45
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Rozpądek P, Rąpała-Kozik M, Wężowicz K, Grandin A, Karlsson S, Ważny R, Anielska T, Turnau K. Arbuscular mycorrhiza improves yield and nutritional properties of onion (Allium cepa). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2016; 107:264-272. [PMID: 27318800 DOI: 10.1016/j.plaphy.2016.06.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 06/02/2016] [Accepted: 06/02/2016] [Indexed: 05/23/2023]
Abstract
Improving the nutritional value of commonly cultivated crops is one of the most pending problems for modern agriculture. In natural environments plants associate with a multitude of fungal microorganisms that improve plant fitness. The best described group are arbuscular mycorrhizal fungi (AMF). These fungi have been previously shown to improve the quality and yield of several common crops. In this study we tested the potential utilization of Rhizophagus irregularis in accelerating growth and increasing the content of important dietary phytochemicals in onion (Allium cepa). Our results clearly indicate that biomass production, the abundance of vitamin B1 and its analogues and organic acid concentration can be improved by inoculating the plant with AM fungi. We have shown that improved growth is accompanied with up-regulated electron transport in PSII and antioxidant enzyme activity.
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Affiliation(s)
- Piotr Rozpądek
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland; Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, 30-239 Kraków, Poland
| | - Maria Rąpała-Kozik
- Department of Comparative Biochemistry and Bioanalytics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| | - Katarzyna Wężowicz
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| | - Anna Grandin
- Man-Technology-Environment Research Centre, Örebro University, Örebro, Sweden
| | - Stefan Karlsson
- Man-Technology-Environment Research Centre, Örebro University, Örebro, Sweden
| | - Rafał Ważny
- Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa 7a, 30-387 Kraków, Poland
| | - Teresa Anielska
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| | - Katarzyna Turnau
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland; Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa 7a, 30-387 Kraków, Poland.
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46
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Mattie M, Raitano A, Morrison K, Morrison K, An Z, Capo L, Verlinsky A, Leavitt M, Ou J, Nadell R, Aviña H, Guevara C, Malik F, Moser R, Duniho S, Coleman J, Li Y, Pereira DS, Doñate F, Joseph IBJ, Challita-Eid P, Benjamin D, Stover DR. The Discovery and Preclinical Development of ASG-5ME, an Antibody-Drug Conjugate Targeting SLC44A4-Positive Epithelial Tumors Including Pancreatic and Prostate Cancer. Mol Cancer Ther 2016; 15:2679-2687. [PMID: 27550944 DOI: 10.1158/1535-7163.mct-16-0225] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 08/07/2016] [Indexed: 11/16/2022]
Abstract
Here, we report the development of an antibody-drug conjugate, ASG-5ME, which targets the solute carrier receptor SLC44A4. SLC44A4 is a member of a family of putative choline transporters that we show to be markedly upregulated in a variety of epithelial tumors, most notably prostate and pancreatic cancer. SLC44A4 is normally expressed on the apical surface of secretory epithelial cells, but in cancer we show expression is not restricted to the luminal surface in advanced and undifferentiated tumors. ASG-5ME consists of a human IgG2 anti-SLC44A4 antibody conjugated through a cleavable linker to the microtubule-disrupting agent monomethylauristatin E. It has potent antitumor activity in both cell line - and patient-derived xenograft models of pancreatic and prostate cancers. Combination studies with ASG-5ME and nab-paclitaxel demonstrated combination effect in both pancreatic and prostate tumor models. Altogether, the data presented here suggest that ASG-5ME may have the potential to offer a new therapeutic option for the treatment of pancreatic and prostate cancers. Mol Cancer Ther; 15(11); 2679-87. ©2016 AACR.
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Affiliation(s)
- Michael Mattie
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California.
| | - Arthur Raitano
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Kendall Morrison
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Karen Morrison
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Zili An
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Linnette Capo
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Alla Verlinsky
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Monica Leavitt
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Jimmy Ou
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Rossana Nadell
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Hector Aviña
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Claudia Guevara
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Faisal Malik
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Ruth Moser
- Seattle Genetics, Inc., Bothell, Washington
| | | | - Jeffrey Coleman
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Ying Li
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Daniel S Pereira
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Fernando Doñate
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Ingrid B J Joseph
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | - Pia Challita-Eid
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
| | | | - David R Stover
- Agensys Inc., an Affiliate of Astellas Pharma Inc., Santa Monica, California
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Nabokina SM, Ramos MB, Said HM. Mechanism(S) Involved in the Colon-Specific Expression of the Thiamine Pyrophosphate (Tpp) Transporter. PLoS One 2016; 11:e0149255. [PMID: 26901654 PMCID: PMC4764741 DOI: 10.1371/journal.pone.0149255] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 01/30/2016] [Indexed: 12/16/2022] Open
Abstract
Microbiota of the large intestine synthesizes considerable amount of vitamin B1 (thiamine) in the form of thiamine pyrophosphate (TPP). We have recently demonstrated the existence of an efficient and specific carrier-mediated uptake process for TPP in human colonocytes, identified the TPP transporter (TPPT) involved (product of the SLC44A4 gene), and shown that expression of TPPT along the gastrointestinal (GI) tract is restricted to the colon. Our aim in this study was to determine the molecular basis of the colon-specific expression of TPPT focusing on a possible epigenetic mechanism. Our results showed that the CpG island predicted in the SLC44A4 promoter is non-methylated in the human colonic epithelial NCM460 cells, but is hyper-methylated in the human duodenal epithelial HuTu80 cells (as well as in the human retinal pigment epithelial ARPE19 cells). In the mouse (where TPPT expression in the GI tract is also restricted to the colon), the CpG island predicted in the Slc44a4 promoter is non-methylated in both the jejunum and colon, thus arguing against possible contribution of DNA methylation in the colon-specific expression of TPPT. A role for histone modifications in the tissue-specific pattern of Slc44a4 expression, however, was suggested by the findings that in mouse colon, histone H3 in the 5’-regulatory region of Slc44a4 is tri-methylated at lysine 4 and acetylated at lysine 9, whereas the tri-methylation at lysine 27 modification was negligible. In contrast, in the mouse jejunum, histone H3 is hyper-trimethylated at lysine 27 (repressor mark). Similarly, possible involvement of miRNA(s) in the tissue-specific expression of TPPT was also suggested by the findings that the 3’-UTR of SLC44A4 is targeted by specific miRNAs/RNA binding proteins in non-colonic, but not in colonic, epithelial cells. These studies show, for the first time, epigenetic mechanisms (histone modifications) play a role in determining the tissue-specific pattern of expression of TPPT in the GI tract.
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Affiliation(s)
- Svetlana M. Nabokina
- Departments of Medicine, Physiology/Biophysics, University of California Irvine, Irvine, CA, 92697, United States of America
| | - Mel Brendan Ramos
- Departments of Medicine, Physiology/Biophysics, University of California Irvine, Irvine, CA, 92697, United States of America
| | - Hamid M. Said
- Departments of Medicine, Physiology/Biophysics, University of California Irvine, Irvine, CA, 92697, United States of America
- Department of Veterans Affairs Medical Center, Long Beach, CA, 90822, United States of America
- * E-mail:
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Simultaneous photometric microplate assay for free and total thiamine using gold nanoparticles and alkaline phosphatase. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-1767-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Nabokina SM, Subramanian VS, Said HM. The human colonic thiamine pyrophosphate transporter (hTPPT) is a glycoprotein and N-linked glycosylation is important for its function. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:866-71. [PMID: 26828122 DOI: 10.1016/j.bbamem.2016.01.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 01/14/2016] [Accepted: 01/24/2016] [Indexed: 12/16/2022]
Abstract
The recently identified human thiamine pyrophosphate transporter (hTPPT; product of the SLC44A4 gene) is responsible for absorption of the microbiota-generated TPP in the large intestine. The hTPPT is highly expressed in the colon, but not in other regions of the intestinal tract and is localized exclusively at the apical membrane domain of epithelia. The hTPPT protein is predicted to have multiple TM domains with a number of putative N-glycosylation sites, but it is not known if the protein is actually glycosylated, and if so at which site, and their role in the functionality of the transporter. Using several approaches including inhibiting de novo N-glycosylation in human colonic epithelial NCM460 cells with tunicamycin as well as enzymatic de-glycosylation, we show that the hTPPT protein is, indeed, a glycoprotein. Glycosylation of hTPPT was shown, by mean of site-directed mutagenesis, to occur at Asn(69), Asn(155), Asn(197), Asn(393), and Asn(416). However, only N-glycosylation at Asn(69), Asn(155), and Asn(393) appeared to be important for transporter functionality possibly through an effect on protein conformation and/or interaction with its ligand (but not through changes in expression at the cell membrane as determined by live cell confocal imaging). Results of this study showed, for the first time, that the hTPPT is glycosylated and that N-linked glycosylation occurs at multiple sites with some of them being important for function. The results also provide an indirect support for a membrane topology for hTPPT with 10 transmembrane domains as predicted by the TMHMM transmembrane helixes prediction program.
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Affiliation(s)
- Svetlana M Nabokina
- Department of Medicine, University of California, Irvine, CA 92697, United States; Department of Physiology/Biophysics, University of California, Irvine, CA 92697, United States; Department of Veterans Affairs Medical Center, Long Beach, CA 90822, United States
| | - Veedamali S Subramanian
- Department of Medicine, University of California, Irvine, CA 92697, United States; Department of Physiology/Biophysics, University of California, Irvine, CA 92697, United States; Department of Veterans Affairs Medical Center, Long Beach, CA 90822, United States
| | - Hamid M Said
- Department of Medicine, University of California, Irvine, CA 92697, United States; Department of Physiology/Biophysics, University of California, Irvine, CA 92697, United States; Department of Veterans Affairs Medical Center, Long Beach, CA 90822, United States.
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Siemieniuk M, Czyzewska U, Strumilo S, Tylicki A. Thiamine antivitamins--an opportunity of therapy of fungal infections caused by Malassezia pachydermatis and Candida albicans. Mycoses 2015; 59:108-16. [PMID: 26691773 DOI: 10.1111/myc.12441] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 10/19/2015] [Accepted: 11/04/2015] [Indexed: 11/30/2022]
Abstract
Severe skin diseases and systemic fungaemia are caused by Malassezia pachydermatis and Candida albicans respectively. Antifungal therapies are less effective because of chronic character of infections and high percentage of relapses. Therefore, there is a great need to develop new strategies of antifungal therapies. We previously found that oxythiamine decreases proliferation of yeast (Saccharomyces cerevisiae), therefore we suggest that thiamine antivitamins can be considered as antifungal agents. The aim of this study was the comparison of thiamine antivitamins (oxythiamine, amprolium, thiochrome, tetrahydrothiamine and tetrahydrooxythiamine) inhibitory effect on the growth rate and energetic metabolism efficiency in non-pathogenic S. cerevisiae and two potentially pathogenic species M. pachydermatis and C. albicans. Investigated species were cultured on a Sabouraud medium supplemented with trace elements in the presence (40 mg l(-1)) or absence of each tested antivitamins to estimate their influence on growth rate, enzyme activity and kinetic parameters of pyruvate decarboxylase and malate dehydrogenase of each tested species. Oxythiamine was the only antivitamin with antifungal potential. M. pachydermatis and S. cerevisiae were the most sensitive, whereas C. albicans was the least sensitive to oxythiamine action. Oxythiamine can be considered as supportive agent in superficial mycoses treatment, especially those caused by species from the genus Malassezia.
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Affiliation(s)
- Magdalena Siemieniuk
- Departament of Cytobiochemistry, Institute of Biology, University of Bialystok, Bialystok, Poland.,Laboratory of Tissue Culture, Institute of Biology, University of Bialystok, Bialystok, Poland
| | - Urszula Czyzewska
- Departament of Cytobiochemistry, Institute of Biology, University of Bialystok, Bialystok, Poland.,Laboratory of Tissue Culture, Institute of Biology, University of Bialystok, Bialystok, Poland
| | - Slawomir Strumilo
- Departament of Cytobiochemistry, Institute of Biology, University of Bialystok, Bialystok, Poland
| | - Adam Tylicki
- Departament of Cytobiochemistry, Institute of Biology, University of Bialystok, Bialystok, Poland
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