1
|
Heteroleptic oxidovanadium(IV)-malate complex improves glucose uptake in HepG2 and enhances insulin action in streptozotocin-induced diabetic rats. Biometals 2022; 35:903-919. [PMID: 35778658 DOI: 10.1007/s10534-022-00413-5] [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: 12/24/2021] [Accepted: 06/11/2022] [Indexed: 11/02/2022]
Abstract
Diabetes mellitus, a complex and heterogeneous disease associated with hyperglycemia, is a leading cause of mortality and reduces life expectancy. Vanadium complexes have been studied for the treatment of diabetes. The effect of complex [VO(bpy)(mal)]·H2O (complex A) was evaluated in a human hepatocarcinoma (HepG2) cell line and in streptozotocin (STZ)-induced diabetic male Wistar rats conditioned in seven groups with different treatments (n = 10 animals per group). Electron paramagnetic resonance and 51V NMR analyses of complex A in high-glucose Dulbecco's Modified Eagle Medium (DMEM) revealed the oxidation and hydrolysis of the oxidovanadium(IV) complex over a period of 24 h at 37 °C to give low-nuclearity vanadates "V1" (H2VO4-), "V2" (H2V2O72-), and "V4" (V4O124-). In HepG2 cells, complex A exhibited low cytotoxic effects at concentrations 2.5 to 7.5 μmol L-1 (IC50 10.53 μmol L-1) and increased glucose uptake (2-NBDG) up to 93%, an effect similar to insulin. In STZ-induced diabetic rats, complex A at 10 and 30 mg kg-1 administered by oral gavage for 12 days did not affect the animals, suggesting low toxicity or metabolic impairment during the experimental period. Compared to insulin treatment alone, complex A (30 mg kg-1) in association with insulin was found to improve glycemia (30.6 ± 6.3 mmol L-1 vs. 21.1 ± 8.6 mmol L-1, respectively; p = 0.002), resulting in approximately 30% additional reduction in glycemia. The insulin-enhancing effect of complex A was associated with low toxicity and was achieved via oral administration, suggesting the potential of complex A as a promising candidate for the adjuvant treatment of diabetes.
Collapse
|
2
|
Rusanov DA, Zou J, Babak MV. Biological Properties of Transition Metal Complexes with Metformin and Its Analogues. Pharmaceuticals (Basel) 2022; 15:ph15040453. [PMID: 35455450 PMCID: PMC9031419 DOI: 10.3390/ph15040453] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 03/29/2022] [Accepted: 04/01/2022] [Indexed: 12/12/2022] Open
Abstract
Metformin is a widely prescribed medication for the treatment and management of type 2 diabetes. It belongs to a class of biguanides, which are characterized by a wide range of diverse biological properties, including anticancer, antimicrobial, antimalarial, cardioprotective and other activities. It is known that biguanides serve as excellent N-donor bidentate ligands and readily form complexes with virtually all transition metals. Recent evidence suggests that the mechanism of action of metformin and its analogues is linked to their metal-binding properties. These findings prompted us to summarize the existing data on the synthetic strategies and biological properties of various metal complexes with metformin and its analogues. We demonstrated that coordination of biologically active biguanides to various metal centers often resulted in an improved pharmacological profile, including reduced drug resistance as well as a wider spectrum of activity. In addition, coordination to the redox-active metal centers, such as Au(III), allowed for various activatable strategies, leading to the selective activation of the prodrugs and reduced off-target toxicity.
Collapse
Affiliation(s)
- Daniil A. Rusanov
- Drug Discovery Lab, Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR 999077, China; (D.A.R.); (J.Z.)
- Laboratory of Medicinal Chemistry, N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Avenue 47, 119991 Moscow, Russia
| | - Jiaying Zou
- Drug Discovery Lab, Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR 999077, China; (D.A.R.); (J.Z.)
- Department of Biochemical Engineering, University College London, Bernard Katz Building, Gower Street, London WC1E 6BT, UK
| | - Maria V. Babak
- Drug Discovery Lab, Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR 999077, China; (D.A.R.); (J.Z.)
- Correspondence:
| |
Collapse
|
3
|
Diaz A, Muñoz-Arenas G, Venegas B, Vázquez-Roque R, Flores G, Guevara J, Gonzalez-Vergara E, Treviño S. Metforminium Decavanadate (MetfDeca) Treatment Ameliorates Hippocampal Neurodegeneration and Recognition Memory in a Metabolic Syndrome Model. Neurochem Res 2021; 46:1151-1165. [PMID: 33559829 DOI: 10.1007/s11064-021-03250-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 01/02/2021] [Accepted: 01/19/2021] [Indexed: 02/07/2023]
Abstract
The consumption of foods rich in carbohydrates, saturated fat, and sodium, accompanied by a sedentary routine, are factors that contribute to the progress of metabolic syndrome (MS). In this way, they cause the accumulation of body fat, hypertension, dyslipidemia, and hyperglycemia. Additionally, MS has been shown to cause oxidative stress, inflammation, and death of neurons in the hippocampus. Consequently, spatial and recognition memory is affected. It has recently been proposed that metformin decavanadate (MetfDeca) exerts insulin mimetic effects that enhance metabolism in MS animals; however, what effects it can cause on the hippocampal neurons of rats with MS are unknown. The objective of the work was to evaluate the effect of MetfDeca on hippocampal neurodegeneration and recognition memory in rats with MS. Administration of MetfDeca for 60 days in MS rats improved object recognition memory (NORt). In addition, MetfDeca reduced markers of oxidative stress and hippocampal neuroinflammation. Accompanied by an increase in the density and length of the dendritic spines of the hippocampus of rats with MS. We conclude that MetfDeca represents an important therapeutic agent to treat MS and induce neuronal and cognitive restoration mechanisms.
Collapse
Affiliation(s)
- Alfonso Diaz
- Faculty of Chemical Sciences, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico
| | - Guadalupe Muñoz-Arenas
- Faculty of Chemical Sciences, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico
| | - Berenice Venegas
- Faculty of Biological Sciences, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico
| | - Rubén Vázquez-Roque
- Laboratory of Neuropsychiatry, Institute of Physiology, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico
| | - Gonzalo Flores
- Laboratory of Neuropsychiatry, Institute of Physiology, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico
| | - Jorge Guevara
- Department of Biochemistry, Faculty of Medicine, National Autonomous University of Mexico, Mexico City, Mexico
| | | | - Samuel Treviño
- Faculty of Chemical Sciences, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico.
| |
Collapse
|
4
|
Correlations between Basal Trace Minerals and Hormones in Middle and Long-Distance High-Level Male Runners. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17249473. [PMID: 33348799 PMCID: PMC7765843 DOI: 10.3390/ijerph17249473] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/09/2020] [Accepted: 12/16/2020] [Indexed: 12/16/2022]
Abstract
Several essential trace minerals play an important role in the endocrine system; however, toxic trace minerals have a disruptive effect. The aim of this research was to determine basal concentrations and the possible correlations between trace minerals in plasma and several plasma hormones in runners. Sixty high-level male endurance runners (21 ± 3 years; 1.77 ± 0.05 m; 64.97 ± 7.36 kg) participated in the present study. Plasma hormones were analyzed using an enzyme-linked immunosorbent assay (ELISA) and plasma trace minerals were analyzed with inductively coupled plasma mass spectrometry (ICP-MS). Correlations and simple linear regression were used to assess the association between trace minerals and hormones. Plasma testosterone concentrations were inversely correlated with manganese (r = -0.543; β = -0.410; p < 0.01), selenium (r = -0.292; β = -0.024; p < 0.05), vanadium (r = -0.406; β = -1.278; p < 0.01), arsenic (r = -0.336; β = -0.142; p < 0.05), and lead (r = -0.385; β = -0.418; p < 0.01). Plasma luteinizing hormone (LH) levels were positively correlated with arsenic (r = 0.298; β = 0.327; p < 0.05) and cesium (r = 0.305; β = 2.272; p < 0.05), and negatively correlated with vanadium (r = -0.303; β = -2.467; p < 0.05). Moreover, cortisol concentrations showed significant positive correlations with cadmium (r = 0.291; β = 209.01; p < 0.05). Finally, insulin concentrations were inversely related to vanadium (r = -0.359; β = -3.982; p < 0.05). In conclusion, endurance runners living in areas with high environmental levels of toxic minerals should check their concentrations of anabolic hormones.
Collapse
|
5
|
Al-Jaidi BA, Odetallah HM, Chandrasekaran B, Amro R. Herbal Medications for the Management of Diabetes Mellitus: A Review. CURRENT TRADITIONAL MEDICINE 2020. [DOI: 10.2174/2215083805666190820115332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Diabetes mellitus is a chronic metabolic disorder of the endocrine system affecting
people worldwide. It is a serious disorder that needs lifetime control which is mainly
treated by numerous chemical agents. Most of these chemical agents are associated with various
unpleasant adverse effects, as a result of which there is a growing interest towards the
alternative medicines which are found to be comparatively safer causing less adverse effects.
As there are many plant’s extracts which are evident to provide hypoglycemic effect, intensive
investigations are under progress to explore their advantageous effects on diabetic patients.
This article discusses some of these important plants that are either being used for diabetes
treatment or under investigation for future drug development.
Collapse
Affiliation(s)
- Bilal A. Al-Jaidi
- Faculty of Pharmacy, Philadelphia University, P.O BOX (1), Philadelphia University (19392), Jordan
| | - Haifa'a Marouf Odetallah
- Faculty of Pharmacy, Philadelphia University, P.O BOX (1), Philadelphia University (19392), Jordan
| | - Balakumar Chandrasekaran
- Faculty of Pharmacy, Philadelphia University, P.O BOX (1), Philadelphia University (19392), Jordan
| | - Razan Amro
- Department of Chemistry, The University of Jordan, Amman 11942, Jordan
| |
Collapse
|
6
|
Sidorova YS, Zorin SN, Petrov NA, Shumakova AA, Frolova YV, Mazo VK. Effect of Vanadium Complex with Enzymatic Hydrolysate of Soy Protein on Carbohydrate and Lipid Metabolism Disorders in Male Wistar Rats. Bull Exp Biol Med 2020; 168:637-640. [PMID: 32246372 DOI: 10.1007/s10517-020-04769-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Indexed: 11/28/2022]
Abstract
The effects of vanadium complex with enzymatic hydrolysate of soy protein (V-EHSPI) were studied in male Wistar rats with induced disorders of carbohydrate and lipid metabolism. The content of vanadium (IV) in the studied complex was 15.8 mg/g dry product. High-lipid high-carbohydrate diet was used to induce disorders of lipid and carbohydrate metabolism. Addition of vanadium in three different doses to the diet over 100-day experiment reduced body weight gain and the levels of glucose, insulin, leptin, and triglycerides. V-EHSPI produced beneficial effects on carbohydrate and lipid metabolism even in a dose 5 μg/kg body weight/day (calculated from the mean food consumption over the entire treatment period). Significant inhibition of growth and changes in the weight of organs in animals treated with V-EHSPI attested to toxicity of vanadium in the studied dose range.
Collapse
Affiliation(s)
- Yu S Sidorova
- Federal Research Centre of Nutrition and Biotechnology, Moscow, Russia.
| | - S N Zorin
- Federal Research Centre of Nutrition and Biotechnology, Moscow, Russia
| | - N A Petrov
- Federal Research Centre of Nutrition and Biotechnology, Moscow, Russia
| | - A A Shumakova
- Federal Research Centre of Nutrition and Biotechnology, Moscow, Russia
| | - Yu V Frolova
- Federal Research Centre of Nutrition and Biotechnology, Moscow, Russia
| | - V K Mazo
- Federal Research Centre of Nutrition and Biotechnology, Moscow, Russia
| |
Collapse
|
7
|
Onaolapo AY, Onaolapo OJ. Nutraceuticals and Diet-based Phytochemicals in Type 2 Diabetes Mellitus: From Whole Food to Components with Defined Roles and Mechanisms. Curr Diabetes Rev 2019; 16:12-25. [PMID: 30378500 DOI: 10.2174/1573399814666181031103930] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 10/19/2018] [Accepted: 10/23/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND Over the past decades, the development and use of an array of prescription medications have considerably improved the clinical management of type 2 diabetes mellitus and the quality of life of patients. However, as our knowledge of the associated risk factors and approaches to its management increases, the increasing roles of diet and the composition of the diet in the etiology and successful management of diabetes mellitus are being illuminated. Presently, a lot of attention is being given to nutraceuticals and certain phytochemicals that are integral parts of the human diet. It is believed that a clearer understanding of their roles may be crucial to 'non-invasive' or minimallyintrusive management, with regards to daily living of patients. In this review, an overview of nutraceutical components and phytochemicals that may be of benefit, or had been known to be beneficial in diabetes mellitus is given. Also, how the roles of such dietary components are evolving in the management of this disorder is highlighted. Lastly, the obstacles that need to be overcome before nutraceuticals can be considered as options for the clinical management of diabetes mellitus areconsidered. CONCLUSION Despite studies that demonstrate their efficacy, no nutraceutical or food-derived compound has been formally adopted as a direct replacement for any class of antidiabetic drugs.
Collapse
Affiliation(s)
- Adejoke Yetunde Onaolapo
- Behavioural Neuroscience/Neurobiology Unit, Department of Anatomy, Ladoke Akintola University of Technology, Ogbomosho, Oyo State, Nigeria
| | - Olakunle James Onaolapo
- Department of Pharmacology, Behavioural Neuroscience/Neuropharmacology Unit, Ladoke Akintola University of Technology, Osogbo, Osun State, Nigeria
| |
Collapse
|
8
|
Ahmadi-Eslamloo H, Dehghani GA, Moosavi SMS. Long-term treatment of diabetic rats with vanadyl sulfate or insulin attenuate acute focal cerebral ischemia/reperfusion injury via their antiglycemic effect. Metab Brain Dis 2018; 33:225-235. [PMID: 29151151 DOI: 10.1007/s11011-017-0153-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 11/14/2017] [Indexed: 02/01/2023]
Abstract
It is well-known that patients with diabetes mellitus have worse clinical outcomes following acute ischemic stroke. The intensifying effects of diabetes on ischemic brain injury have been shown to be mostly due to hyperglycemia, rather than the lack of insulin direct effects on brain. It is also well-approved that vanadium compounds have insulin-like and anti-diabetic effects, and the present study was designed to compare the protective effects of diabetes treatment with vanadium or insulin on ischemic/reperfused brain injury. Male Sprague-Dawley rats were divided into 4 groups (n = 21). Two groups of streptozotocin-induced diabetic rats were treated with either vanadyl sulfate or insulin at proper doses to similarly attenuate hyperglycemia during 45 days, while there was no treatment in the control diabetic and non-diabetic sham groups. Thereafter, all treated and non-treated diabetic rats were subjected to 60-min of the right middle cerebral artery occlusion followed by 12-h reperfusion, and then their brains were removed for evaluating blood-brain barrier leakage, tissue swelling, infarct size and oxidant status in both hemispheres. Vanadium and insulin that equally reduced blood glucose and water intake had some differences in their antidiabetic effects of ameliorating weight loss and hypertension during 45-days treatment period. However, they caused similar decrements in levels of Evans blue dye extravastion, edema, infarct volume and malondialdehyde in ischemic/reperfused cerebral hemisphere. Therefore, it can be suggested that insulin and vanadium via their antiglycemic effect cause reduction in cerebral production of oxidants following acute focal ischemia/reperfusion, which attenuate BBB disruption and brain tissue injury.
Collapse
Affiliation(s)
- Hossein Ahmadi-Eslamloo
- Department of Physiology, The Medical School, Shiraz University of Medical Sciences, Shiraz, 71365-1689, Iran
| | - Gholam Abbas Dehghani
- Department of Physiology, The Medical School, Shiraz University of Medical Sciences, Shiraz, 71365-1689, Iran
| | - Seyed Mostafa Shid Moosavi
- Department of Physiology, The Medical School, Shiraz University of Medical Sciences, Shiraz, 71365-1689, Iran.
- Shiraz Nephro-Urology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
| |
Collapse
|
9
|
Metforminium Decavanadate as a Potential Metallopharmaceutical Drug for the Treatment of Diabetes Mellitus. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:6058705. [PMID: 27119007 PMCID: PMC4826921 DOI: 10.1155/2016/6058705] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/02/2016] [Revised: 02/22/2016] [Accepted: 02/23/2016] [Indexed: 12/14/2022]
Abstract
New potential drugs based on vanadium are being developed as possible treatments for diabetes mellitus (DM) and its complications. In this regard, our working group developed metforminium decavanadate (MetfDeca), a compound with hypoglycemic and hypolipidemic properties. MetfDeca was evaluated in models of type 1 and type 2 diabetes mellitus, on male Wistar rats. Alloxan-induction was employed to produce DM1 model, while a hypercaloric-diet was employed to generate DM2 model. Two-month treatments with 3.7 μg (2.5 μM)/300 g/twice a week for DM2 and 7.18 μg (4.8 μM)/300 g/twice a week for DM1 of MetfDeca, respectively, were administered. The resulting pharmacological data showed nontoxicological effects on liver and kidney. At the same time, MetfDeca showed an improvement of carbohydrates and lipids in tissues and serum. MetfDeca treatment was better than the monotherapies with metformin for DM2 and insulin for DM1. Additionally, MetfDeca showed a protective effect on pancreatic beta cells of DM1 rats, suggesting a possible regeneration of these cells, since they recovered their insulin levels. Therefore, MetfDeca could be considered not only as an insulin-mimetic agent, but also as an insulin-enhancing agent. Efforts to elucidate the mechanism of action of this compound are now in progress.
Collapse
|
10
|
Moise G, Gallup NM, Alexandrova AN, Hengge AC, Johnson SJ. Conservative tryptophan mutants of the protein tyrosine phosphatase YopH exhibit impaired WPD-loop function and crystallize with divanadate esters in their active sites. Biochemistry 2015; 54:6490-500. [PMID: 26445170 DOI: 10.1021/acs.biochem.5b00496] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Catalysis in protein tyrosine phosphatases (PTPs) involves movement of a protein loop called the WPD loop that brings a conserved aspartic acid into the active site to function as a general acid. Mutation of the tryptophan in the WPD loop of the PTP YopH to any other residue with a planar, aromatic side chain (phenylalanine, tyrosine, or histidine) disables general acid catalysis. Crystal structures reveal these conservative mutations leave this critical loop in a catalytically unproductive, quasi-open position. Although the loop positions in crystal structures are similar for all three conservative mutants, the reasons inhibiting normal loop closure differ for each mutant. In the W354F and W354Y mutants, steric clashes result from six-membered rings occupying the position of the five-membered ring of the native indole side chain. The histidine mutant dysfunction results from new hydrogen bonds stabilizing the unproductive position. The results demonstrate how even modest modifications can disrupt catalytically important protein dynamics. Crystallization of all the catalytically compromised mutants in the presence of vanadate gave rise to vanadate dimers at the active site. In W354Y and W354H, a divanadate ester with glycerol is observed. Such species have precedence in solution and are known from the small molecule crystal database. Such species have not been observed in the active site of a phosphatase, as a functional phosphatase would rapidly catalyze their decomposition. The compromised functionality of the mutants allows the trapping of species that undoubtedly form in solution and are capable of binding at the active sites of PTPs, and, presumably, other phosphatases. In addition to monomeric vanadate, such higher-order vanadium-based molecules are likely involved in the interaction of vanadate with PTPs in solution.
Collapse
Affiliation(s)
- Gwendolyn Moise
- Department of Chemistry and Biochemistry, Utah State University , Logan, Utah 84322-0300, United States
| | - Nathan M Gallup
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095-1569, United States
| | - Anastassia N Alexandrova
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095-1569, United States.,California Nanosystems Institute, University of California , Los Angeles, California 90095-1569, United States
| | - Alvan C Hengge
- Department of Chemistry and Biochemistry, Utah State University , Logan, Utah 84322-0300, United States
| | - Sean J Johnson
- Department of Chemistry and Biochemistry, Utah State University , Logan, Utah 84322-0300, United States
| |
Collapse
|
11
|
Bâlici Ş, Wankeu-Nya M, Rusu D, Nicula GZ, Rusu M, Florea A, Matei H. Ultrastructural Analysis of In Vivo Hypoglycemiant Effect of Two Polyoxometalates in Rats with Streptozotocin-Induced Diabetes. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2015; 21:1236-1248. [PMID: 26343528 DOI: 10.1017/s1431927615015020] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Two polyoxometalates (POMs), synthesized through a self-assembling method, were used in the treatment of streptozotocin (STZ)-induced diabetic rats. One of these nanocompounds [tris(vanadyl)-substituted tungsto-antimonate(III)-anions—POM1] was previously described in the literature, whereas the second [tris-butyltin-21-tungsto-9-antimonate(III)-anions—POM2], was prepared by us based on our original formula. In rats with STZ-induced diabetes treated with POMs (up to a cumulative dose of 4 mg/kg bodyweight at the end of the treatments), statistically significant reduced levels of blood glucose were measured after 3 weeks, as compared with the diabetic control groups (DCGs). Ultrastructural analysis of pancreatic β-cells (including the mean diameter of secretory vesicles and of their insulin granules) in the treated diabetic rats proved the POMs contribute to limitation of cellular degeneration triggered by STZ, as well as to the presence of increased amounts of insulin-containing vesicles as compared with the DCG. The two POMs also showed hepatoprotective properties when ultrastructural aspects of hepatocytes in the experimental groups of rats were studied. Based on our in vivo studies, we concluded that the two POMs tested achieved hypoglycemiant effects by preventing STZ-triggered apoptosis of pancreatic β-cells and stimulation of insulin synthesis.
Collapse
Affiliation(s)
- Ştefana Bâlici
- 1Department of Cell and Molecular Biology, Faculty of Medicine,"Iuliu Haţieganu" University of Medicine and Pharmacy,6 Louis Pasteur St.,400349 Cluj-Napoca,România
| | - Modeste Wankeu-Nya
- 1Department of Cell and Molecular Biology, Faculty of Medicine,"Iuliu Haţieganu" University of Medicine and Pharmacy,6 Louis Pasteur St.,400349 Cluj-Napoca,România
| | - Dan Rusu
- 4Department of Physical-Chemistry, Faculty of Pharmacy,"Iuliu Haţieganu" University of Medicine and Pharmacy,6 Louis Pasteur St.,400349 Cluj-Napoca,România
| | - Gheorghe Z Nicula
- 1Department of Cell and Molecular Biology, Faculty of Medicine,"Iuliu Haţieganu" University of Medicine and Pharmacy,6 Louis Pasteur St.,400349 Cluj-Napoca,România
| | - Mariana Rusu
- 2Department of Inorganic Chemistry, Faculty of Chemistry and Chemical Engineering,"Babeş-Bolyai" University,11 Arany Janos St.,400028 Cluj-Napoca,România
| | - Adrian Florea
- 1Department of Cell and Molecular Biology, Faculty of Medicine,"Iuliu Haţieganu" University of Medicine and Pharmacy,6 Louis Pasteur St.,400349 Cluj-Napoca,România
| | - Horea Matei
- 1Department of Cell and Molecular Biology, Faculty of Medicine,"Iuliu Haţieganu" University of Medicine and Pharmacy,6 Louis Pasteur St.,400349 Cluj-Napoca,România
| |
Collapse
|
12
|
Screening of trace elements in hair of the female population with different types of cancers in Wielkopolska region of Poland. ScientificWorldJournal 2014; 2014:953181. [PMID: 25580464 PMCID: PMC4279272 DOI: 10.1155/2014/953181] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 11/24/2014] [Accepted: 11/25/2014] [Indexed: 12/11/2022] Open
Abstract
Background. Cancer constitutes a major health problem worldwide. Thus, search for reliable and practical markers of the disease process remains the key issue of the diagnostic process. Objectives. The study aims at linking the trace element status of an organism, assessed by hair analysis, with the occurrence of cancer diseases. Material and Methods. Hair samples were collected from 299 patients with cancer diseases confirmed by a histopathological test and from 100 controls. Cancer patients were divided into three groups, depending on cancer type: hormone-dependent cancer, cancer of the alimentary tract, and cancer with high glycolytic activity. Mineral element analysis of hair was performed using an atomic emission spectrophotometer with inductively coupled plasma (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS). Results. Statistically significantly lower concentrations of selenium, zinc, copper, germanium and boron, iron, and magnesium were observed in the three groups of cancer patients. Disturbance in the axis glucose-insulin and changes in concentrations of heavy metals and toxic elements were also noted. Conclusions. It seems safe to conclude that our results confirmed usefulness of hair element analysis in screening tests for the assessment of the biomarker of various cancer diseases in a female population.
Collapse
|
13
|
Soumya RS, Reshmi R, Jomon S, Antu KA, Riya MP, Raghu KG. Synthesis, characterization and evaluation of the antioxidant potential of vanadium encapsulated guar gum nanoparticles. Food Funct 2014; 5:535-44. [PMID: 24463743 DOI: 10.1039/c3fo60339c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present study investigated the antioxidant potential of guar gum macroparticles (GGMs), vanadium oxide sulphate (VS) encapsulated guar gum macroparticles (GVMs), guar gum nanoparticles (GGNs), VS encapsulated guar gum nanoparticles (GVNs) and VS. GGNs and GVNs prepared by nanoprecipitation were characterized by SEM (scanning electron microscopy), TEM (transmission electron microscopy) and particle size analysis to confirm the nanostructure of the particles. Particle size analysis revealed that GVNs possess a size of 239 nm, about 148 nm larger than that of GGNs. TEM imaging and EDAX data also confirmed the formation of fine spherical nanoparticles with vanadium incorporation. In addition the larger size of GVNs also confirmed the vanadium incorporation. MTT assay showed that concentrations up to 100 nM of GVNs for 24 h exposure did not induce significant toxicity when VS was toxic (16%) at 100 nM. Various in vitro antioxidant assays (total reducing power, total antioxidant capacity, DPPH (2,2-diphenyl-1-picrylhydrazyl), ABTS (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid), hydroxyl radical and superoxide anion radical scavenging assays) revealed significantly high antioxidant potential of GVNs compared to GGNs, VS, GGMs and GVMs. The IC50 of GVNs was 23.21 ± 2.1 μg mL(-1), 33.0 ± 2.93 μg mL(-1), 21 ± 1.98 μg mL(-1) and 22.79 ± 2.12 μg mL(-1) for DPPH, ABTS, hydroxyl, superoxide anion scavenging activity assays respectively. The cell line based assay also proved that the GVN was more effective in reactive oxygen species (ROS) scavenging than VS against tertiary butyl hydrogen peroxide (TBHP) induced oxidative stress in H9c2 cell lines. The overall results indicated that vanadium in combination with nano guar gum exhibits significantly high antioxidant potential.
Collapse
Affiliation(s)
- R S Soumya
- Agroprocessing and Natural Products Division, Council of Scientific and Industrial Research-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram-695019, Kerala, India.
| | | | | | | | | | | |
Collapse
|
14
|
Variation in macro and trace elements in progression of type 2 diabetes. ScientificWorldJournal 2014; 2014:461591. [PMID: 25162051 PMCID: PMC4138889 DOI: 10.1155/2014/461591] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 06/30/2014] [Indexed: 12/12/2022] Open
Abstract
Macro elements are the minerals of which the body needs more amounts and are more important than any other elements. Trace elements constitute a minute part of the living tissues and have various metabolic characteristics and functions. Trace elements participate in tissue and cellular and subcellular functions; these include immune regulation by humoral and cellular mechanisms, nerve conduction, muscle contractions, membrane potential regulations, and mitochondrial activity and enzyme reactions. The status of micronutrients such as iron and vanadium is higher in type 2 diabetes. The calcium, magnesium, sodium, chromium, cobalt, iodine, iron, selenium, manganese, and zinc seem to be low in type 2 diabetes while elements such as potassium and copper have no effect. In this review, we emphasized the status of macro and trace elements in type 2 diabetes and its advantages or disadvantages; this helps to understand the mechanism, progression, and prevention of type 2 diabetes due to the lack and deficiency of different macro and trace elements.
Collapse
|
15
|
Missaoui S, Ben Rhouma K, Yacoubi MT, Sakly M, Tebourbi O. Vanadyl sulfate treatment stimulates proliferation and regeneration of beta cells in pancreatic islets. J Diabetes Res 2014; 2014:540242. [PMID: 25215302 PMCID: PMC4156977 DOI: 10.1155/2014/540242] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 07/07/2014] [Accepted: 07/28/2014] [Indexed: 11/20/2022] Open
Abstract
We examined the effects of vanadium sulfate (VOSO4) treatment at 5 and 10 mg/kg for 30 days on endocrine pancreas activity and histology in nondiabetic and STZ-induced diabetic rats. In diabetic group, blood glucose levels significantly increased while insulinemia level markedly decreased. At the end of treatment, VOSO4 at a dose of 10 mg/Kg normalized blood glucose level in diabetic group, restored insulinemia, and significantly improved insulin sensitivity. VOSO4 also increased in a dose-dependent manner the number of insulin immunopositive beta cells in pancreatic islets of nondiabetic rats. Furthermore, in the STZ-diabetic group, the decrease in the number of insulin immunopositive beta cells was corrected to reach the control level mainly with the higher dose of vanadium. Therefore, VOSO4 treatment normalized plasma glucose and insulin levels and improved insulin sensitivity in STZ-experimental diabetes and induced beta cells proliferation and/or regeneration in normal or diabetic rats.
Collapse
Affiliation(s)
- Samira Missaoui
- Laboratory of Integrated Physiology, Faculty of Sciences of Bizerte, University of Carthage, 7021 Jarzouna, Tunisia
| | - Khémais Ben Rhouma
- Laboratory of Integrated Physiology, Faculty of Sciences of Bizerte, University of Carthage, 7021 Jarzouna, Tunisia
| | - Mohamed-Tahar Yacoubi
- Department of Pathological Anatomy, Farhat Hached University Hospital, 4000 Sousse, Tunisia
| | - Mohsen Sakly
- Laboratory of Integrated Physiology, Faculty of Sciences of Bizerte, University of Carthage, 7021 Jarzouna, Tunisia
- *Mohsen Sakly:
| | - Olfa Tebourbi
- Laboratory of Integrated Physiology, Faculty of Sciences of Bizerte, University of Carthage, 7021 Jarzouna, Tunisia
| |
Collapse
|
16
|
Ozturk N, Olgar Y, Ozdemir S. Trace elements in diabetic cardiomyopathy: An electrophysiological overview. World J Diabetes 2013; 4:92-100. [PMID: 23961319 PMCID: PMC3746091 DOI: 10.4239/wjd.v4.i4.92] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Revised: 07/12/2013] [Accepted: 07/19/2013] [Indexed: 02/05/2023] Open
Abstract
There is a growing body of evidence that Diabetes Mellitus leads to a specific cardiomyopathy apart from vascular disease and bring about high morbidity and mortality throughout the world. Recent clinical and experimental studies have extensively demonstrated that this cardiomyopathy causes impaired cardiac performance manifested by early diastolic and late systolic dysfunction. This impaired cardiac performance most probably have emerged upon the expression and activity of regulatory proteins such as Na+/Ca2+ exchanger, sarcoplasmic reticulum Ca2+-ATPase, ryanodine receptor and phospholamban. Over years many therapeutic strategies have been recommended for treatment of diabetic cardiomyopathy. Lately, inorganic elements have been suggested to have anti-diabetic effects due to their suggested ability to regulate glucose homeostasis, reduce oxidative stress or suppress phosphatases. Recent findings have shown that trace elements exert many biological effects including insulin-mimetic or antioxidant activity and in this manner they have been recommended as potential candidates for treatment of diabetes-induced cardiac complications, an effect based on their modes of action. Some of these trace elements are known to play an essential role as component of enzymes and thus modulate the organ function in physiological and pathological conditions. Besides, they can also manipulate redox state of the channels via antioxidant properties and thus contribute to the regulation of [Ca2+]i homeostasis and cardiac ion channels. On account of little information about some trace elements, we discussed the effect of vanadium, selenium, zinc and tungstate on diabetic heart complications.
Collapse
|
17
|
Magnesium can protect against vanadium-induced lipid peroxidation in the hepatic tissue. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:802734. [PMID: 23766862 PMCID: PMC3666205 DOI: 10.1155/2013/802734] [Citation(s) in RCA: 205] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2013] [Revised: 04/07/2013] [Accepted: 04/08/2013] [Indexed: 11/23/2022]
Abstract
The protective effect of magnesium as magnesium sulfate (MS) on sodium-metavanadate- (SMV-) induced lipid peroxidation (LPO) under in vivo and in vitro conditions was studied. The 18-week SMV intoxication (Group II, 0.125 Vend/mL) enhanced spontaneous malondialdehyde (MDA) generation in rat liver, compared with the control (Group I) and MS-supplemented animals (Group III, 0.06 Mgend/mL). Coadministration of SMV with MS (Group IV, SMV-MS) caused a return of the MDA level to the control value range. The effect seems to result from the Mgend-independent action and its antagonistic interaction with Vend. The in vitro treatment of liver supernatants (LS) obtained from all the tested animals groups with selected exogenous concentrations of Feexg or Vexg exhibited enhanced MDA production, compared with spontaneously formed MDA. It also showed Mgexg-stimulating effect on LPO (LS I, Group I) and revealed that the changes in the MDA generation in LS IV (Group IV) might have resulted from the synergistic interactions of Vend with Feexg and Vexg and from the antagonistic interactions of Mgend with Feexg and Vexg. The findings allow a suggestion that adequate Mg intake for a specific period in the conditions of SMV exposure may prevent V-induced LPO in the liver.
Collapse
|
18
|
NCAM function in the adult brain: lessons from mimetic peptides and therapeutic potential. Neurochem Res 2013; 38:1163-73. [PMID: 23494903 DOI: 10.1007/s11064-013-1007-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2012] [Revised: 02/01/2013] [Accepted: 02/18/2013] [Indexed: 01/22/2023]
Abstract
Neural cell adhesion molecules (NCAMs) are complexes of transmembranal proteins critical for cell-cell interactions. Initially recognized as key players in the orchestration of developmental processes involving cell migration, cell survival, axon guidance, and synaptic targeting, they have been shown to retain these functions in the mature adult brain, in relation to plastic processes and cognitive abilities. NCAMs are able to interact among themselves (homophilic binding) as well as with other molecules (heterophilic binding). Furthermore, they are the sole molecule of the central nervous system undergoing polysialylation. Most interestingly polysialylated and non-polysialylated NCAMs display opposite properties. The precise contributions each of these characteristics brings in the regulations of synaptic and cellular plasticity in relation to cognitive processes in the adult brain are not yet fully understood. With the aim of deciphering the specific involvement of each interaction, recent developments led to the generation of NCAM mimetic peptides that recapitulate identified binding properties of NCAM. The present review focuses on the information such advances have provided in the understanding of NCAM contribution to cognitive function.
Collapse
|
19
|
Sugiyama H, Matsugo S, Misu H, Takamura T, Kaneko S, Kanatani Y, Kaido M, Mihara C, Abeywardana N, Sakai A, Sato K, Miyashita Y, Kanamori K. Regulation of the physiological effects of peroxidovanadium(V) complexes by the electronic nature of ligands. J Inorg Biochem 2013; 121:66-76. [PMID: 23353084 DOI: 10.1016/j.jinorgbio.2012.12.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 12/18/2012] [Accepted: 12/18/2012] [Indexed: 01/15/2023]
Abstract
Although the physiological effects of peroxidovanadium(V) complexes (pVs) have been extensively investigated both in vitro and in vivo with regard to their pharmacological activity, such as insulin-mimetic and antitumor activities, the relationship between the chemical and pharmacological properties of pVs is still unclear. Rational drug design with pVs depends on a full understanding of this relationship. Toward this end, the current report evaluates the physiological effects of 13 pVs were evaluated bound to a variety of ligand. Six of these ligands are tripodal tetradentate ligands, one is a linear tetradentate ligand, one boasts two pendant groups, three are tridentate ligands, and two are alkoxido-bridging, dinucleating ligands. The cytotoxicities of these pVs could be classified into three groups: significantly toxic, moderately toxic, and non- or negligibly toxic. Further, IC50 values could be related with the LMCT transition energies of the peroxido group, particularly among complexes with similar ligands. This relation indicates that the electronic properties of the peroxido group affected the physiological activity of the pV complex. We also investigated the insulin-signaling intensity of each pV. Phosphorylation of protein kinase B and extracellular signal-regulated kinase 1/2, two major insulin-signaling proteins, was observed after treating cells with pV for 30 min. Phosphorylation was particularly remarkable for complexes that exhibited high cytotoxicity. The present results demonstrate that the toxicity and physiological effects of pVs can be controlled by selecting an appropriate ancillary ligand. These findings provide a guide for synthesis of new pVs that may be used as candidate therapeutic agents.
Collapse
Affiliation(s)
- Hironori Sugiyama
- Advanced Nanosciences and Biosciences, Graduate School of Innovative Life Science, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Ulbricht C, Chao W, Costa D, Culwell S, Eichelsdoerfer P, Flanagan K, Guilford J, Higdon ERB, Isaac R, Mintzer M, Rusie E, Serrano JMG, Windsor RC, Woods J, Zhou S. An evidence-based systematic review of vanadium by the Natural Standard Research Collaboration. J Diet Suppl 2012; 9:223-51. [PMID: 22891992 DOI: 10.3109/19390211.2012.709365] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
An evidence-based systematic review of vanadium by the Natural Standard Research Collaboration consolidates the safety and efficacy data available in the scientific literature using a validated, reproducible grading rationale. This article includes written and statistical analysis of clinical trials, plus a compilation of expert opinion, folkloric precedent, history, pharmacology, kinetics/dynamics, interactions, adverse effects, toxicology, and dosing.
Collapse
Affiliation(s)
- Catherine Ulbricht
- Natural Standard Research Collaboration, Massachusetts GeneralHospital, Somerville, Massachusetts, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Yousef Ebrahimipour S, Mague JT, Akbari A, Takjoo R. Synthesis, characterization, crystal structure and thermal behavior of 4-Bromo-2-(((5-chloro-2-hydroxyphenyl)imino)methyl)phenol and its oxido-vanadium(V) complexes. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2012.05.076] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
22
|
Kuznetsov VI, Alexandrova AN, Hengge AC. Metavanadate at the active site of the phosphatase VHZ. J Am Chem Soc 2012; 134:14298-301. [PMID: 22876963 DOI: 10.1021/ja305579h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Vanadate is a potent modulator of a number of biological processes and has been shown by crystal structures and NMR spectroscopy to interact with numerous enzymes. Although these effects often occur under conditions where oligomeric forms dominate, the crystal structures and NMR data suggest that the inhibitory form is usually monomeric orthovanadate, a particularly good inhibitor of phosphatases because of its ability to form stable trigonal-bipyramidal complexes. We performed a computational analysis of a 1.14 Å structure of the phosphatase VHZ in complex with an unusual metavanadate species and compared it with two classical trigonal-bipyramidal vanadate-phosphatase complexes. The results support extensive delocalized bonding to the apical ligands in the classical structures. In contrast, in the VHZ metavanadate complex, the central, planar VO(3)(-) moiety has only one apical ligand, the nucleophilic Cys95, and a gap in electron density between V and S. A computational analysis showed that the V-S interaction is primarily ionic. A mechanism is proposed to explain the formation of metavanadate in the active site from a dimeric vanadate species that previous crystallographic evidence has shown to be able to bind to the active sites of phosphatases related to VHZ. Together, the results show that the interaction of vanadate with biological systems is not solely reliant upon the prior formation of a particular inhibitory form in solution. The catalytic properties of an enzyme may act upon the oligomeric forms primarily present in solution to generate species such as the metavanadate ion observed in the VHZ structure.
Collapse
Affiliation(s)
- Vyacheslav I Kuznetsov
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, USA
| | | | | |
Collapse
|
23
|
Winter PW, Al-Qatati A, Wolf-Ringwall AL, Schoeberl S, Chatterjee PB, Barisas BG, Roess DA, Crans DC. The anti-diabetic bis(maltolato)oxovanadium(iv) decreases lipid order while increasing insulin receptor localization in membrane microdomains. Dalton Trans 2012; 41:6419-30. [DOI: 10.1039/c2dt30521f] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
24
|
Willsky GR, Chi LH, Godzala M, Kostyniak PJ, Smee JJ, Trujillo AM, Alfano JA, Ding W, Hu Z, Crans DC. Anti-diabetic effects of a series of vanadium dipicolinate complexes in rats with streptozotocin-induced diabetes. Coord Chem Rev 2011; 255:2258-2269. [PMID: 23049138 PMCID: PMC3461829 DOI: 10.1016/j.ccr.2011.06.015] [Citation(s) in RCA: 169] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The effects of oral treatment of rats with streptozotocin-induced diabetes with a range of vanadium dipicolinate complexes (Vdipic) and derivatives are reviewed. Structure-reactivity relationships are explored aiming to correlate properties such as stability, to their insulin-enhancing effects. Three types of modifications are investigated; first, substitutions on the aromatic ring, second, coordination of a hydroxylamido group to the vanadium, and third, changes in the oxidation state of the vanadium ion. These studies allowed us to address the importance of coordination chemistry, and redox chemistry, as modes of action. Dipicolinate was originally chosen as a ligand because the dipicolinatooxovanadium(V) complex (V5dipic), is a potent inhibitor of phosphatases. The effect of vanadium oxidation state (3, 4 or 5), on the insulin-enhancing properties was studied in both the Vdipic and VdipicCl series. Effects on blood glucose, body weight, serum lipids, alkaline phosphatase and aspartate transaminase were selectively monitored. Statistically distinct differences in activity were found, however, the trends observed were not the same in the Vdipic and VdipicCl series. Interperitoneal administration of the Vdipic series was used to compare the effect of administration mode. Correlations were observed for blood vanadium and plasma glucose levels after V5dipic treatment, but not after treatment with corresponding V4dipic and V3dipic complexes. Modifications of the aromatic ring structure with chloride, amine or hydroxyl groups had limited effects. Global gene expression was measured using Affymetrix oligonucleotide chips. All diabetic animals treated with hydroxyl substituted V5dipic (V5dipicOH) and some diabetic rats treated with vanadyl sulfate had normalized hyperlipidemia yet uncontrolled hyperglycemia and showed abnormal gene expression patterns. In contrast to the normal gene expression profiles previously reported for some diabetic rats treated with vanadyl sulfate, where both hyperlipidemia and hyperglycemia were normalized. Modification of the metal, changing the coordination chemistry to form a hydroxylamine ternary complex, had the most influence on the anti-diabetic action. Vanadium absorption into serum was determined by atomic absorption spectroscopy for selected vanadium complexes. Only diabetic rats treated with the ternary V5dipicOH hydroxylamine complex showed statistically significant increases in accumulation of vanadium into serum compared to diabetic rats treated with vanadyl sulfate. The chemistry and physical properties of the Vdipic complexes correlated with their anti-diabetic properties. Here, we propose that compound stability and ability to interact with cellular redox reactions are key components for the insulin-enhancing activity of vanadium compounds. Specifically, we found that the most overall effective anti-diabetic Vdipic compounds were obtained when the compound administered had an increased coordination number in the vanadium complex.
Collapse
Affiliation(s)
- Gail R. Willsky
- University at Buffalo, School of Medicine and Biomedical Sciences, Buffalo, NY USA
| | - Lai-Har Chi
- University at Buffalo, School of Medicine and Biomedical Sciences, Buffalo, NY USA
| | - Michael Godzala
- University at Buffalo, School of Medicine and Biomedical Sciences, Buffalo, NY USA
| | - Paul J. Kostyniak
- University at Buffalo, School of Medicine and Biomedical Sciences, Buffalo, NY USA
| | - Jason J. Smee
- Present Address: Dept of Chemistry, The University of Texas at Tyler, Tyler TX, USA
- Department of Chemistry, Colorado State University, Fort Collins CO, USA
| | | | - Josephine A. Alfano
- University at Buffalo, School of Medicine and Biomedical Sciences, Buffalo, NY USA
| | - Wenjin Ding
- College of Life Sciences, Graduate University of Chinese Academy of Sciences, Beijing, China
| | - Zihua Hu
- University at Buffalo, Center for Computational Research, Buffalo NY USA
| | - Debbie C. Crans
- Department of Chemistry, Colorado State University, Fort Collins CO, USA
| |
Collapse
|
25
|
Turner TL, Nguyen VH, McLauchlan CC, Dymon Z, Dorsey BM, Hooker JD, Jones MA. Inhibitory effects of decavanadate on several enzymes and Leishmania tarentolae in vitro. J Inorg Biochem 2011; 108:96-104. [PMID: 22005446 DOI: 10.1016/j.jinorgbio.2011.09.009] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 08/12/2011] [Accepted: 09/06/2011] [Indexed: 12/11/2022]
Abstract
Multiple studies report apparent effects of vanadium on various systems in vivo and in vitro. Vanadium species may be possible deterrents for the growth of the Leishmania parasite, which causes the sometimes deadly diseases known as leishmaniasis. The current studies focus specifically on decavanadate V(10)O(28)(6-) (V10), which has a potential to be a potent effector for disease treatment. The X-ray structure of a new solvate salt of V10, namely (NH(4))(6)V(10)O(28)·5H(2)O, is also reported. Other vanadium complexes with imidazole carboxylate, anthranilate, or picolinate were also evaluated. The yellow-orange oxoanion, used as the (NH(4))(6)V(10)O(28)·6H(2)O salt, was tested (at 1-100 μM) directly with two strains of Leishmania tarentolae promastigotes in culture to evaluate the effect on cell viability. Vanadium coordination complexes are known effective inhibitors of phosphatases. Using the artificial phosphatase substrate para-nitrophenylphosphate in the presence of a bovine calf intestine alkaline phosphatase enzyme, V10 (from 5 to 100 μM) was shown to be a mixed inhibitor for this enzyme and decreased the activity of the other two phosphatases tested. The effect of V10 and the other vanadium complexes on the activity of phosphoglycerate mutase B (PGAM), an important enzyme in glycolysis and gluconeogenesis, was also evaluated. At 10 μM, V10 was the most potent inhibitor of PGAM, with an apparent reduction of about 50%. Taken together, we speculate that V10 could have a role in treating Leishmania diseases.
Collapse
Affiliation(s)
- Timothy L Turner
- Illinois State University, Department of Chemistry, Normal, IL 61790–4160, USA
| | | | | | | | | | | | | |
Collapse
|
26
|
Moniz T, Amorim MJ, Ferreira R, Nunes A, Silva A, Queirós C, Leite A, Gameiro P, Sarmento B, Remião F, Yoshikawa Y, Sakurai H, Rangel M. Investigation of the insulin-like properties of zinc(II) complexes of 3-hydroxy-4-pyridinones: identification of a compound with glucose lowering effect in STZ-induced type I diabetic animals. J Inorg Biochem 2011; 105:1675-82. [PMID: 22088976 DOI: 10.1016/j.jinorgbio.2011.09.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Revised: 08/03/2011] [Accepted: 09/01/2011] [Indexed: 11/24/2022]
Abstract
Results from an investigation in an in vivo model of STZ-induced diabetic rats demonstrate that compound bis(1,2-dimethyl-3-hydroxy-4(1H)-pyridinonate)zinc(II), Zn(dmpp)(2), significantly lowers the blood glucose levels of individuals, thus showing evidence of glucose lowering activity. The compound was selected from a set of eight zinc(II) complexes of 3-hydroxy-4-pyridinones with diverse lipophilicity that were prepared and characterized in our laboratory. Assessment of insulin-like activity of the complexes was firstly performed in vitro by measuring the inhibition of FFA release in isolated rat adipocytes. The results indicate that compounds bis(2-methyl-3-hydroxy-4-pyridinonate)zinc(II), Zn(mpp)(2) and Zn(dmpp)(2) display significantly higher activity than that of the respective positive control thus suggesting its selection for in vivo tests. Safety evaluation of the active zinc(II) compounds was performed in freshly isolated rat hepatocytes. The results support that cell viability is not significantly different from the control set after 1 and 2h of incubation with both zinc(II) complexes.
Collapse
Affiliation(s)
- Tânia Moniz
- REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Abstract
The current status and likely future directions of complexes of V(V/IV), Cr(III), Mo(VI), W(VI), Zn(II), Cu(II), and Mn(III) as potential oral drugs against type 2 diabetes are reviewed. We propose a unified model of extra- and intracellular mechanisms of anti-diabetic efficacies of V(V/IV), Mo(VI), W(VI), and Cr(III), centred on high-oxidation-state oxido/peroxido species that inhibit protein tyrosine phosphatases (PTPs) involved in insulin signalling. The postulated oxidative mechanism of anti-diabetic activity of Cr(III) via carcinogenic Cr(VI/V) (which adds to safety concerns) is consistent with recent clinical trials on Cr(III) picolinate, where activity was apparent only in patients with poorly controlled diabetes (high oxidative stress), and the correlation between the anti-diabetic activities and ease of oxidation of Cr(III) supplements and their metabolites in vivo. Zn(II) and Cu(II) anti-diabetics act via different mechanisms and are unlikely to be used as specific anti-diabetics due to their diverse and unpredictable biological activities. Hence, future research directions are likely to centre on enhancing the bioavailability and selectivity of V(V/IV), Mo(VI), or W(VI) drugs. The strategy of potentiating circulating insulin with metal ions has distinct therapeutic advantages over interventions that stimulate the release of more insulin, or use insulin mimetics, because of many adverse side-effects of increased levels of insulin, including increased risks of cancer and cardiovascular diseases.
Collapse
Affiliation(s)
- Aviva Levina
- School of Chemistry, The University of Sydney, NSW, Australia
| | | |
Collapse
|
28
|
Mani SS, Subramanian IP, Pillai SS, Muthusamy K. Evaluation of hypoglycemic activity of inorganic constituents in Nelumbo nucifera seeds on streptozotocin-induced diabetes in rats. Biol Trace Elem Res 2010; 138:226-37. [PMID: 20165930 DOI: 10.1007/s12011-010-8614-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2009] [Accepted: 01/14/2010] [Indexed: 02/02/2023]
Abstract
The seeds of Nelumbo nucifera (Lotus) have been used in the traditional system of medicine for various ailments including diabetes. The present study was aimed at analyzing the levels of biologically important trace elements in the lotus seeds by atomic absorption spectroscopy and evaluating the hypoglycemic properties of seed ash on streptozotocin-induced diabetes in rats. Diabetic rats treated with lotus seed ash at a concentration of 200 mg/kg body weight orally for 30 days exhibited significant hypoglycemic activity. The presence of trace elements in appreciable amounts in the seeds may play a direct or indirect role on insulin secretion or its action in a synergetic manner. The hypoglycemic activity of the ash was comparable with glyclazide. The role of trace elements in disorders related to diabetes is also discussed briefly.
Collapse
Affiliation(s)
- Sivasankari S Mani
- Department of Biochemistry, University of Madras, Guindy Campus, Chennai 600 025, India
| | | | | | | |
Collapse
|
29
|
Scibior A, Zaporowska H. Effects of combined vanadate and magnesium treatment on erythrocyte antioxidant defence system in rats. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2010; 30:153-161. [PMID: 21787646 DOI: 10.1016/j.etap.2010.05.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2009] [Revised: 05/07/2010] [Accepted: 05/11/2010] [Indexed: 05/31/2023]
Abstract
The effect of vanadate and magnesium treatment on erythrocyte defence system was studied in outbred 2-month-old, albino male Wistar rats (14 rats/each group) which daily received: Group I (Control)-deionized water to drink; Group II-water solution of sodium metavanadate (NaVO(3); SMV) at a concentration of 0.125mgV/mL; Group III-water solution of magnesium sulfate (MgSO(4); MS) at a concentration of 0.06mgMg/mL, Group IV-water solution of SMV-MS at the same concentrations over a 12-week time. The fluid intake and the concentration of reduced glutathione (GSH) as well as the activity of Cu, Zn-superoxide dismutase (Cu, Zn-SOD), catalase (CAT) and glutathione reductase (GR) were significantly decreased in the rats receiving SMV alone (Group II) or in combination with MS (Group IV) compared with Groups I and III. The cellular glutathione peroxidase (cGSH-Px) activity was unchanged in all the treated groups. The activity of glutathione S-transferase (GST) fell in the animals in Group II, compared with the rats in Groups I, III and IV; whereas in the rats in Group III its activity was higher than in the control animals. These results showed that V (as SMV) consumed by the rats with drinking water at a dose of 12mgV/kg b.w./24h for 12 weeks may attenuate defence system in rats' erythrocytes (RBCs), which is probably a consequence of vanadium pro-oxidant potential. Therefore, reactive oxygen species (ROS) are suggested to be involved in the alterations in antioxidant defence system in these cells. Mg (as MS) at the dose ingested (6mgMg/kg b.w./24h) at co-exposure to SMV was not able to counteract its deleterious effect. The results also provide evidence that V-Mg interactions may be involved in the decrease of erythrocyte GR activity and Mg concentration in the plasma under concomitant treatment with both metals at the doses of 12.6mgV and 6mgMg/kg b.w./24h.
Collapse
Affiliation(s)
- Agnieszka Scibior
- Department of Cell Biology, Institute of Environmental Protection, John Paul II Catholic University of Lublin, Kraśnicka Ave 102, 20-718 Lublin, Poland
| | | |
Collapse
|
30
|
Hu R, He C, Liu J, Wu Y, Li J, Feng Z, Huang J, Xi XG, Wu Z. Effects of insulin-mimetic vanadyl-poly(gamma-glutamic acid) complex on diabetic rat model. J Pharm Sci 2010; 99:3041-7. [PMID: 20120019 DOI: 10.1002/jps.22071] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Poly-gamma-glutamic acid (gamma-PGA) prepared by fermentation of microbe was used as drug carrier for vanadium sulfate to obtain vanadyl-poly-gamma-glutamic acid (VO-gamma-PGA) complex. The FI-IR spectrum of the complex demonstrated that the expected VO-gamma-PGA complex is formed by the coordination of VO(2+) through the side chain carboxylic groups of the gamma-PGA. Studies of the complex in treating type I diabetes were carried out on alloxan induced diabetes rats. The results of treating the rats in 2 weeks and then stopping administration for 10 days showed that VO-gamma-PGA can effectively lower blood glucose levels of diabetic rats during administration. But after ceasing treatment there were no differences between groups in blood glucose level and water intake. The results of oral glucose tolerance and some serum parameters also demonstrated that VO-gamma-PGA was more effective than vanadium sulfate in treating diabetic rats.
Collapse
Affiliation(s)
- Rongzhang Hu
- Laboratory of Molecular Biology, School of Life Science, East China Normal University, 3663 Zhongshan North Road, Shanghai 200062, PR China
| | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Meyer JA, Spence DM. A perspective on the role of metals in diabetes: past findings and possible future directions. Metallomics 2009. [DOI: 10.1039/b817203j] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
32
|
Smee JJ, Epps JA, Ooms K, Bolte SE, Polenova T, Baruah B, Yang L, Ding W, Li M, Willsky GR, la Cour A, Anderson OP, Crans DC. Chloro-substituted dipicolinate vanadium complexes: synthesis, solution, solid-state, and insulin-enhancing properties. J Inorg Biochem 2008; 103:575-84. [PMID: 19201030 DOI: 10.1016/j.jinorgbio.2008.12.015] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2008] [Revised: 12/07/2008] [Accepted: 12/10/2008] [Indexed: 11/26/2022]
Abstract
Three vanadium complexes of chlorodipicolinic acid (4-chloro-2,6-dipicolinic acid) in oxidation states III, IV, and V were prepared and their properties characterized across the oxidation states. In addition, the series of hydroxylamido, methylhydroxylamido, dimethylhydroxylamido, and diethylhydroxylamido complexes were prepared from the chlorodipicolinato dioxovanadium(V) complex. The vanadium(V) compounds were characterized in solution by (51)V and (1)H NMR and in the solid-state by X-ray diffraction and (51)V NMR. Density Functional Theory (DFT) calculations were performed to evaluate the experimental parameters and further describes the electronic structure of the complex. The small structural changes that do occur in bond lengths and angles and partial charges on different atoms are minor compared to the charge features that are responsible for the majority of the electric field gradient tensor. The EPR parameters of the vanadium(IV) complex were characterized and compared to the corresponding dipicolinate complex. The chemical properties of the chlorodipicolinate compounds are discussed and correlated with their insulin-enhancing activity in streptozoticin (STZ) induced diabetic Wistar rats. The effect of the chloro-substitution on lowering diabetic hyperglycemia was evaluated and differences were found depending on the compounds oxidation state similar as was observed for the vanadium III, IV and V dipicolinate complexes (P. Buglyo, D.C. Crans, E.M. Nagy, R.L. Lindo, L. Yang, J.J. Smee, W. Jin, L.-H. Chi, M.E. Godzala III, G.R. Willsky, Inorg. Chem. 44 (2005) 5416-5427). However, a linear correlation of oxidation states with efficacy was not observed, which suggests that the differences in mode of action are not simply an issue of redox equivalents. Importantly, our results contrast the previous observation with the vanadium-picolinate complexes, where the halogen substituents increased the insulin-enhancing properties of the complex (T. Takino, H. Yasui, A. Yoshitake, Y. Hamajima, R. Matsushita, J. Takada, H. Sakurai, J. Biol. Inorg. Chem. 6 (2001) 133-142).
Collapse
Affiliation(s)
- Jason J Smee
- Department of Chemistry, The University of Texas at Tyler, Tyler, TX 75799, USA
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Mao X, Zhang L, Xia Q, Sun Z, Zhao X, Cai H, Yang X, Xia Z, Tang Y. Vanadium-enriched chickpea sprout ameliorated hyperglycemia and impaired memory in streptozotocin-induced diabetes rats. Biometals 2008; 21:563-70. [DOI: 10.1007/s10534-008-9142-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2008] [Accepted: 04/09/2008] [Indexed: 10/22/2022]
|
34
|
Ashiq U, Ara R, Mahroof-Tahir M, Maqsood Z, Khan K, Khan S, Siddiqui H, Choudhary M. Synthesis, Spectroscopy, and Biological Properties of Vanadium(IV)–Hydrazide Complexes. Chem Biodivers 2008; 5:82-92. [DOI: 10.1002/cbdv.200890016] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
35
|
Campagnolo M, Campa C, Zorzi RD, Wuerges J, Geremia S. X-ray studies on ternary complexes of maltodextrin phosphorylase. Arch Biochem Biophys 2007; 471:11-9. [PMID: 18164678 DOI: 10.1016/j.abb.2007.11.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2007] [Revised: 11/14/2007] [Accepted: 11/18/2007] [Indexed: 10/22/2022]
Abstract
We report crystal structures of ternary complexes of maltodextrin phosphorylase with natural oligosaccharide and phosphate mimicking anions: nitrate, sulphate and vanadate. Electron density maps obtained from crystals grown in presence of Al(NO3)3 show a nitrate ion instead of the expected AlF4- in the catalytic site. The trigonal NO3- is coplanar with the Arg569 guanidinium group and mimics three of the four oxygen atoms of phosphate. The ternary complex with sulphate shows a partial occupancy of the anionic site. The low affinity of the sulphate ion, observed when the alpha-glucosyl substrate is present in the catalytic channel, is ascribed to restricted space for the anion. Even lower occupancy is observed for the larger vanadate anion. The Malp/G5/VO43- structure shows the partial occupancy of the oligosaccharide and the dislocation of the 380's loop. This has been attributed to the formation of oligosaccharide vanadate derivatives (confirmed by capillary electrophoresis) that reduces their effective concentration. The difficulty to trap a ternary complex mimicking the ground state has been correlated to the apparent lower affinity that natural substrates show regarding the intermediates of the enzymatic reaction.
Collapse
Affiliation(s)
- Mara Campagnolo
- CEB-Centre of Excellence in Biocrystallography, Department of Chemical Sciences, University of Trieste, via L. Giorgieri 1, 34127 Trieste, Italy
| | | | | | | | | |
Collapse
|
36
|
Willsky GR, Chi LH, Liang Y, Gaile DP, Hu Z, Crans DC. Diabetes-altered gene expression in rat skeletal muscle corrected by oral administration of vanadyl sulfate. Physiol Genomics 2006; 26:192-201. [PMID: 16684804 DOI: 10.1152/physiolgenomics.00196.2005] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Treatment with vanadium, a representative of a class of antidiabetic compounds, alleviates diabetic hyperglycemia and hyperlipidemia. Oral administration of vanadium compounds in animal models and humans does not cause clinical symptoms of hypoglycemia, a common problem for diabetic patients with insulin treatment. Gene expression, using Affymetrix arrays, was examined in muscle from streptozotocin-induced diabetic and normal rats in the presence or absence of oral vanadyl sulfate treatment. This treatment affected normal rats differently from diabetic rats, as demonstrated by two-way ANOVA of the full array data. Diabetes altered the expression of 133 genes, and the expression of 30% of these genes dysregulated in diabetes was normalized by vanadyl sulfate treatment. For those genes, the ratio of expression in normal animals to the expression in diabetic animals showed a strong negative correlation with the ratio of expression in diabetic animals to the expression in diabetic animals treated with vanadyl sulfate ( P = −0.85). The genes identified belong to six major metabolic functional groups: lipid metabolism, oxidative stress, muscle structure, protein breakdown and biosynthesis, the complement system, and signal transduction. The identification of oxidative stress genes, coupled with the known oxidative chemistry of vanadium, implicates reactive oxygen species in the action of this class of compounds. These results imply that early transition metals or compounds formed from their chemical interactions with other metabolites may act as general transcription modulators, a role not usually associated with this class of compounds.
Collapse
Affiliation(s)
- Gail R Willsky
- Department of Biochemistry, School of Medicine and Biomedical Sciences, The State University of New York (SUNY) at Buffalo, Buffalo, New York 14214, USA.
| | | | | | | | | | | |
Collapse
|
37
|
Siddiqui MR, Moorthy K, Taha A, Hussain ME, Baquer NZ. Low doses of vanadate and Trigonella synergistically regulate Na+/K + -ATPase activity and GLUT4 translocation in alloxan-diabetic rats. Mol Cell Biochem 2006; 285:17-27. [PMID: 16622606 DOI: 10.1007/s11010-005-9002-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2005] [Accepted: 09/12/2005] [Indexed: 01/14/2023]
Abstract
Oral administration of vanadate to diabetic animals have been shown to stabilize the glucose homeostasis and restore altered metabolic pathways. However, vanadate exerts these effects at relatively high doses with several toxic effects. Low doses of vanadate are relatively safe but unable to elicit any antidiabetic effects. The present study explored the prospect of using low doses of vanadate with Trigonella foenum graecum, seed powder (TSP), another antidiabetic agent, and to evaluate their antidiabetic effect in diabetic rats. Alloxan diabetic rats were treated with insulin, vanadate, TSP and low doses of vanadate with TSP for three weeks. The effect of these antidiabetic compounds was examined on general physiological parameters, Na(+)/K(+) ATPase activity, membrane lipid peroxidation and membrane fluidity in liver, kidney and heart tissues. Expression of glucose transporter (GLUT4) protein was also examined by immunoblotting method in experimental rat heart after three weeks of diabetes induction. Diabetic rats showed high blood glucose levels. Activity of Na(+)/K(+) ATPase decreased in diabetic liver and heart. However, kidney showed a significant increase in Na(+)/K(+) ATPase activity. Diabetic rats exhibited an increased level of lipid peroxidation and decreased membrane fluidity. GLUT4 distribution was also significantly lowered in heart of alloxan diabetic rats. Treatment of diabetic rats with insulin, TSP, vanadate and a combined therapy of lower dose of vanadate with TSP revived normoglycemia and restored the altered level of Na(+)/K(+) ATPase, lipid peroxidation and membrane fluidity and also induced the redistribution of GLUT4 transporter. TSP treatment alone is partially effective in restoring the above diabetes-induced alterations. Combined therapy of vanadate and TSP was the most effective in normalization of altered membrane linked functions and GLUT4 distribution without any harmful side effect.
Collapse
Affiliation(s)
- Mohammad Rizwan Siddiqui
- Hormone and Drug Research Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | | | | | | | | |
Collapse
|
38
|
Jelveh KA, Zhande R, Brownsey RW. Inhibition of cyclic AMP dependent protein kinase by vanadyl sulfate. J Biol Inorg Chem 2006; 11:379-88. [PMID: 16506078 DOI: 10.1007/s00775-006-0087-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2005] [Accepted: 01/29/2006] [Indexed: 10/25/2022]
Abstract
Vanadium salts influence the activities of a number of mammalian enzymes in vitro but the mechanisms by which low concentrations of vanadium ameliorate the effects of diabetes in vivo remain poorly understood. The hypothesis that vanadium compounds act by inhibiting protein tyrosine phosphatases has attracted most support. The studies described here further evaluate the possibility that vanadyl sulfate trihydrate (VS) can also inhibit 3',5'-cyclic adenosine monophosphate (cAMP) dependent protein kinase (PKA). Using conventional assay conditions, VS inhibited PKA only at high concentrations (IC50>400 microM); however, PKA inhibition was seen at dramatically lower concentrations of VS (IC50<10 microM) when sequestration of vanadyl ions was minimized. Vanadyl appears to be the effective PKA inhibitor because sodium orthovanadate did not inhibit PKA and inhibition by vanadyl was abolished by potential chelators such as ethylenediaminetetraacetic acid or glycyl peptides. PKA inhibition by vanadyl appears to be mixed rather than strictly competitive or uncompetitive and may replicate the inhibitory effects of high concentrations of Mg2+. The effect of vanadyl on PKA provides a possible explanation for the effects of vanadium salts on fat tissue lipolysis and perhaps on other aspects of energy metabolism that are controlled by cAMP-dependent mechanisms. Considering the high degree of conservation of the active sites of protein kinases, vanadyl may also influence other members of this large protein family.
Collapse
Affiliation(s)
- Kioumars A Jelveh
- Department of Biochemistry and Molecular Biology, Life Sciences Institute, University of British Columbia, 2350 Health Sciences Mall, Vancouver, BC, Canada, V6T 1Z3
| | | | | |
Collapse
|
39
|
Gao LH, Liu WP, Wang BL, Li L, Xie MJ, Li YR, Chen ZH, Chen XZ. Effects of bis(alpha-furancarboxylato)oxovanadium(IV) on non-diabetic and streptozotocin-diabetic rats. Clin Chim Acta 2006; 368:173-8. [PMID: 16487949 DOI: 10.1016/j.cca.2005.12.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2005] [Revised: 11/20/2005] [Accepted: 12/28/2005] [Indexed: 11/18/2022]
Abstract
BACKGROUND Bis(alpha-furancarboxylato)oxovanadium(IV) (BFOV), a new orally active anti-diabetic vanadium complex with organic agent, has been synthesized and characterized. The current study examined the stability in aqueous solution and effects of the complex on carbohydrate and lipid metabolism in non-diabetic and streptozotocin-induced diabetic rats. METHODS Diabetic rats were induced by a single dose injection of streptozotocin (STZ, 50 mg/kg body weight, i.p.). The rats were randomly divided into non-diabetic (control, CON), diabetic (DM) and BFOV (0.2 mmol/kg body weight)-treated, diabetic-BFOV (0.1, 0.2 and 0.4 mmol/kg body weight) groups. All substances were given intragastrically to non-diabetic and STZ-induced diabetic rats for 4 weeks. Blood glucose concentration was monitored during administration and, at the end of experiment glycosylated hemoglobin, serum insulin, lipid concentrations and glycogen content were observed. RESULTS Administration of BFOV to STZ-diabetic rats dose-dependently reduced blood glucose concentration when compared to diabetic rats (P<0.01), but it did not influence blood glucose in non-diabetic rats. Serum insulin concentrations were not increased in the BFOV-treated diabetic groups and, in contrast, significantly lowered in the 0.2 mmol/kg body weight BFOV-treated non-diabetic group at the end of experiment. Moreover, BFOV markedly reduced glycosylated hemoglobin concentration and improved dyslipidemia in STZ-diabetic rats, in a dose-dependent manner (P<0.05, P<0.01), but had no significant effect on non-diabetic rats. CONCLUSION The organic vanadium complex was found to effectively attenuate diabetic alterations in STZ-diabetic rats.
Collapse
Affiliation(s)
- Li H Gao
- Yunnan Pharmacological Laboratories of Natural Products, Kunming Medical College, Kunming, PR China
| | | | | | | | | | | | | | | |
Collapse
|
40
|
Mohammad S, Taha A, Bamezai RNK, Baquer NZ. Modulation of glucose transporter (GLUT4) by vanadate and Trigonella in alloxan-diabetic rats. Life Sci 2006; 78:820-4. [PMID: 16289562 DOI: 10.1016/j.lfs.2005.05.105] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2004] [Accepted: 05/23/2005] [Indexed: 11/28/2022]
Abstract
Oral administration of vanadate is an effective treatment for diabetes in animal models. However, vanadate exerts these effects at high doses and several toxic effects are produced. Low doses of vanadate are relatively safe but are unable to elicit any antidiabetic effect. The present study explored the prospect of using low doses of vanadate in combination with Trigonella seed powder (TSP) to evaluate their antidiabetic effect in alloxan-diabetic rats. Alloxan-diabetic rats were treated with insulin, vanadate, TSP and vanadate and TSP in combination for 3 weeks. The effect of these antidiabetic compounds was examined on general physiological parameters and distribution of glucose transporter (GLUT4) in skeletal muscle by immunoblotting and immunohistochemistry. Treatment of alloxan-diabetic rats with insulin, vanadate, TSP and vanadate in combination with TSP revived normoglycemia and restored the disturbances in the distribution of GLUT4 in skeletal muscle. TSP treatment was only partially effective in the restoration of diabetic alterations. The treatment of diabetic rats with combined doses of vanadate and TSP was most effective in the normalization of plasma glucose levels and correction of altered GLUT4 distribution.
Collapse
Affiliation(s)
- Sameer Mohammad
- School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | | | | | | |
Collapse
|
41
|
Bolkent S, Bolkent S, Yanardag R, Tunali S. Protective effect of vanadyl sulfate on the pancreas of streptozotocin-induced diabetic rats. Diabetes Res Clin Pract 2005; 70:103-9. [PMID: 16188572 DOI: 10.1016/j.diabres.2005.02.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/09/2005] [Indexed: 11/20/2022]
Abstract
The aim of this study is to examine from a biochemical and histological perspective, whether vanadium has a protective effect on the pancreas of diabetic rats. Male, 6-6.5 months old, Swiss albino rats were divided into four groups. Group I: control (intact) animals (n=13). Group II: control rats given vanadyl sulfate (n=5). Group III: streptozotocin-induced diabetic animals (n=11). Group IV: streptozotocin-induced diabetic animals given vanadyl sulfate (n=11). Vanadyl sulfate was given by gavage technique to rats in a dose of 100mg/kg daily for 60 days, after experimental animals were made diabetic. On day 60, the pancreas tissue and blood samples were taken from the animals. In the streptozotocin-induced diabetic group, blood glucose levels significantly increased in contrast to the loss of body weight, but vanadyl sulfate in streptozotocin-diabetic rats reduced blood glucose levels and increased both blood glutathione levels and body weight. Tissue sections were immunostained using an insulin antibody. The control group given vanadyl sulfate was no different from the other intact control group considering the insulin immunoreactivity in B cells. In pancreatic islets of the diabetic group, a decrease in the number of immunoreactive B cells was observed in comparison to the control group. On the other hand, pancreatic islets of the diabetic group given vanadyl sulfate showed a higher number of immunoreactive B cells in comparison to the diabetic group. According to the immunohistochemical and biochemical results obtained, it was concluded that vanadyl sulfate can regenerate B cells of endocrine pancreas in experimental diabetes.
Collapse
Affiliation(s)
- Sema Bolkent
- Department of Medical Biology, Cerrahpasa Faculty of Medicine, Istanbul University, 34098-Cerrahpasa, Istanbul, Turkey.
| | | | | | | |
Collapse
|
42
|
Aguirre MV, Juaristi JA, Alvarez MA, Brandan NC. Characteristics of in vivo murine erythropoietic response to sodium orthovanadate. Chem Biol Interact 2005; 156:55-68. [PMID: 16137666 DOI: 10.1016/j.cbi.2005.07.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2005] [Revised: 07/08/2005] [Accepted: 07/08/2005] [Indexed: 11/23/2022]
Abstract
Current knowledge about the effects of vanadium compounds on erythropoiesis is still reduced and even contradictory. The aim of this work was to evaluate the in vivo effects of a single dose of sodium orthovanadate (OV, 33 mg/kg i.p.) on CF-1 mice in a time course study (0-8 days). Murine erythropoiesis was assessed through a combinatory of experimental approaches. Classical peripheral and bone marrow (BM) hematological parameters were determined. Erythroid maturation in blood stream and hemopoietic tissues (59Fe uptake assays), BM erythroid progenitor frequency (clonogenic assays) and erythroid crucial protein expressions for commitment and survival: GATA-1, erythropoietin receptor (Epo-R) and Bcl-xL (immunoblottings) were evaluated. Neither BM cellularities nor BM viabilities changed noticeably during the study. Peripheral reticulocytes showed a biphasic increment on days 2 and 8 post-OV. hematocrits enhanced transiently between days 2 and 4. 59Fe uptake percentages enhanced in peripheral blood nearly two-fold over control values between 4 and 8 days (p<0.01) without changes in BM and spleen. Additionally, mature erythroid BM compartments: polychromatophilic erythroblasts and orthochromatic normoblasts increased by the eighth day. BFU-E colonies remained near basal values during the whole experience, whilst CFU-E colonies raised 60% over control at 8 days post-OV (p<0.05). GATA-1 and Epo-R were significantly over-expressed from the third until the end of the experimental protocol (p<0.01). Surprisingly, Bcl-xL showed a constitutive expression pattern without changes during the experience. Experimental data let us suggest that OV does not to cause bone marrow cytotoxicity and that it accelerates maturation of BM committed erythroid precursors. Moreover, there are significant correlations among erythroid-related protein expressions: GATA-1 and Epo-R and the frequency of CFU-E. In addition, Bcl-xL expression invariance during the time course study would indicate that the stimulatory effect of OV treatment on erythropoiesis was mainly exerted on the maturation of red cell precursors rather than on the antiapoptosis of erythroid terminal progenitors.
Collapse
Affiliation(s)
- María Victoria Aguirre
- Department of Biochemistry, Faculty of Medicine, Northeast National University, Moreno 1240, 3400 Corrientes, Argentina
| | | | | | | |
Collapse
|
43
|
Clark TA, Edel AL, Heyliger CE, Pierce GN. Effective control of glycemic status and toxicity in Zucker diabetic fatty rats with an orally administered vanadate compound. Can J Physiol Pharmacol 2005; 82:888-94. [PMID: 15573149 DOI: 10.1139/y04-109] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A novel black tea decoction containing vanadate has successfully replaced insulin in a rat model of insulin-dependent diabetes but is untested in non-insulin-dependent diabetic animals. A tea-vanadate decoction (TV) containing 30 or 40 mg sodium orthovanadate was administered by oral gavage to two groups of Zucker diabetic fatty rats and a conventional water vehicle containing 30 or 40 mg of sodium orthovanadate to two others. In the latter group receiving the 30-mg dose, vanadate induced diarrhea in 50% of the rats and death in 10%. In contrast, TV-treated rats had no incidence of diarrhea and no deaths. Symptoms were more severe in both groups with higher vanadate doses, so these were discontinued. After approximately 16 weeks, the level of vanadium in plasma and tissue extracts was negligible in a further group of untreated rats but highly elevated after vanadate treatment. Vanadium levels were not significantly different between the TV-treated diabetic rats and the diabetic rats given vanadate in a water vehicle. Over the 115 days of the study, blood glucose levels increased from approximately 17 to 25 mmol/L in untreated diabetic rats. This was effectively lowered (to <10 mmol/L) by TV treatment. Fasting blood glucose levels were 5, 7, and 20 mmol/L in control (nondiabetic, untreated), TV-treated and untreated diabetic rats, respectively. Rats required treatment with TV for only approximately 50% of the days in the study. Increase in body mass during the study was significantly lower in untreated diabetic rats (despite higher food intake) than the other groups. Body mass gain and food intake were normal in TV-treated rats. Water intake was 28 mL/rat daily in control rats, 130 mL/rat daily in untreated diabetic rats, and 52 mL/rat daily in TV-treated diabetic rats. Plasma creatinine and aspartate aminotransferase levels were significantly depressed in untreated diabetic rats, and TV treatment normalized this. Our results demonstrate that a novel oral therapy containing black tea and vanadate possesses a striking capacity to regulate glucose and attenuates complications in a rat model of type II diabetes.
Collapse
Affiliation(s)
- Tod A Clark
- The National Centre for Agri-food Research in Medicine, St. Boniface General Hospital Research Centre, Department of Physiology, Faculty of Medicine, University of Manitoba, Winnipeg, Canada
| | | | | | | |
Collapse
|
44
|
Kordowiak AM, Goc A, Drozdowska E, Turyna B, Dabros W. Sodium orthovanadate exerts influence on liver Golgi complexes from control and streptozotocin-diabetic rats. J Inorg Biochem 2005; 99:1083-9. [PMID: 15833331 DOI: 10.1016/j.jinorgbio.2005.01.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2004] [Revised: 01/21/2005] [Accepted: 01/28/2005] [Indexed: 11/23/2022]
Abstract
The paper presents the effect of one-week 3mM sodium orthovanadate (Na3VO4) oral treatment of control and streptozotocin[STZ]-diabetic rats. The body weight decreased as compared with untreated control (C group) in both vanadate treated groups (C + V and D + V) and in diabetic untreated rats (D group)--in all cases p < 0.01. A similar tendency was demonstrated by the weight of the livers, which was statistically significant lower than in the controls (p < 0.01). The fluid and food intake were lower in comparison with control vanadium treated groups, in D + V as compared with D it was limited, however, not achieved control level. A high mortality rate, approx. 67%, after the administration of streptozotocin and vanadate (D + V group) was noted; such result had never been previously found within all study groups of rats. But the surviving rats show very good decreased (60%) free blood sugar levels, however euglycaemia was not achieved. The activity of galactosyltransferase, the Golgi complex marker enzyme in group D, was statistically lower than the controls (p < 0.001). Treatment of STZ-diabetic rats with orthovanadate did not increase the enzyme activity toward control level, in both diabetic groups (treated and untreated with Na3VO4) similar dispersion of individual results was found. Morphological study demonstrated, for the first time, no larger cellular lesion in C + V group. The Golgi complex was well developed; showed several cisterns at the trans side, which were grossly distended and contained electron-lucid floccular material. In D + V group typical, cylindrical forms of Golgi complexes predominated. These structures consisted of 3-4 almost practically non-distended cisterns. Also in this case, large, electron-dense vesicles were noted in the vicinity. In this group, small in size, myelin-like structures were also found. These structures might indicate a relatively small, but nevertheless clear damage of the internal membrane system. The external cistern of the cylindrical forms of Golgi complexes, which corresponded the trans side, was often markedly distended and formed a vacuole-like structure filled with electron lucent material; the structure itself sometimes looked empty. Multi-vesicular structures were observed also in this case, but they were seen much more rarely.
Collapse
Affiliation(s)
- Anna M Kordowiak
- Department of General Biochemistry, Faculty of Biotechnology, Jagiellonian University, 16 Grzegorzecka St., 31-531 Cracow, Poland.
| | | | | | | | | |
Collapse
|
45
|
Hamrin K, Henriksson J. Local effect of vanadate on interstitial glucose and lactate concentrations in human skeletal muscle. Life Sci 2005; 76:2329-38. [PMID: 15748626 DOI: 10.1016/j.lfs.2004.11.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2004] [Accepted: 11/06/2004] [Indexed: 10/25/2022]
Abstract
The aim of this study was to investigate the local effect of the insulin-mimetic agent vanadate on glucose metabolism in human skeletal muscle in vivo. Interstitial concentrations of glucose and lactate were determined by microdialysis at a low flow rate in the quadriceps femoris muscle of 18 men. In the same leg two microdialysis catheters were inserted. In one catheter, the perfusion medium was supplemented with sodium metavanadate (10-100 mM) after a basal period, the other catheter served as control. In the catheter perfused with metavanadate, the interstitial glucose concentration was decreased by 13-50% compared to the control catheter (p<0.05). The lactate concentration was higher in the 50 mM and 100 mM metavanadate catheters compared to control (39-89%, p<0.05). There was no difference between control and metavanadate catheters in urea concentrations. Five of the subjects were insulin-resistant and for them the results were similar, although the effect was somewhat smaller. The decreased interstitial glucose concentration, and the increased lactate concentration, in the vicinity of the microdialysis catheter most likely reflects an increased cellular glucose uptake. The present study thus indicates that vanadate mimics the effect of insulin in human skeletal muscle in vivo.
Collapse
Affiliation(s)
- K Hamrin
- Department of Physiology and Pharmacology, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | | |
Collapse
|
46
|
Abstract
Inorganic and organic compounds of vanadium have been shown to exhibit a large range of insulinomimetic effects in the cardiovascular system, including stimulation of glucose transporter 4 (GLUT-4) translocation and glucose transport in adult cardiomyocytes. Furthermore, administration of vanadium compounds improves cardiac performance and smooth muscle contractility, and modulates blood pressure in various models of hypertension and insulin resistance. Vanadium compounds are potent inhibitors of protein tyrosine phosphatases. As a result, they promote an increase in protein tyrosine phosphorylation of several key components of the insulin signaling pathway, leading to the upregulation of phosphatidylinositol 3-kinase and protein kinase B, two enzymes involved in mediating GLUT-4 trans location and glucose transport. In addition, vanadium has also been shown to activate p38 mitogen-activated protein kinase and increase Ca2+levels in several cell types. The ability of vanadium compounds to activate these signaling events may be responsible for their ability to modulate cardiovascular functions.Key words: vanadium compounds, glucose transport, smooth muscle contractility, insulin signaling pathway.
Collapse
Affiliation(s)
- Lise Coderre
- Research Center, Centre hospitalier de l'Université de Montréal, Hôtel-Dieu, Department of Medicine, Université de Montréal, QC, Canada
| | | |
Collapse
|
47
|
Clark TA, Heyliger CE, Edel AL, Goel DP, Pierce GN. Codelivery of a tea extract prevents morbidity and mortality associated with oral vanadate therapy in streptozotocin-induced diabetic rats. Metabolism 2004; 53:1145-51. [PMID: 15334376 DOI: 10.1016/j.metabol.2004.03.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Oral administration of vanadate has a strong hypoglycemic effect but results in toxic side effects like life-threatening diarrhea. Tea is known to have potent antidiarrhea effects. We investigated the potential of suspending the vanadate in a tea decoction to reduce the diarrheatic action of vanadate. A concentrated extract of Lichee black tea was, therefore, added to sodium orthovanadate. Streptozotocin (STZ)-induced diabetic rats were orally gavaged with vanadate suspended in water or in the tea decoction, or with the tea extract alone. Blood glucose levels were assessed daily over 11 weeks with levels greater than 10 mmol/L warranting therapeutic intervention. Both the vanadate/water and vanadate/tea solutions acutely reduced blood glucose. The tea extract alone had no effect. The majority of vanadate/water-treated rats developed diarrhea and mortality rates approached 40%. Vanadate/tea-treated diabetic rats experienced no diarrhea or mortality and liver and kidney analyses (plasma ALT and creatinine, blood urea nitrogen [BUN], and urine-specific gravity) were normal. Animals treated with vanadate/tea retained blood glucose levels less than 10 mmol/L for an average of 24 consecutive days without subsequent treatments. Cataract formation was completely prevented. The mechanism of action of vanadate may have involved beta-cell stimulation because vanadate/tea-treated diabetic rats exhibited normal plasma insulin levels. In summary, because of its long-lasting effects, oral administration, and lack of side effects, vanadate/tea represents a potentially important alternative therapy for an insulin-deficient diabetic state.
Collapse
Affiliation(s)
- Tod A Clark
- The National Centre for Agrifood Research in Medicine, University of Mannitoba, Winnipeg, Canada
| | | | | | | | | |
Collapse
|
48
|
Crans DC, Smee JJ, Gaidamauskas E, Yang L. The chemistry and biochemistry of vanadium and the biological activities exerted by vanadium compounds. Chem Rev 2004; 104:849-902. [PMID: 14871144 DOI: 10.1021/cr020607t] [Citation(s) in RCA: 989] [Impact Index Per Article: 49.5] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Debbie C Crans
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, USA.
| | | | | | | |
Collapse
|
49
|
Mukherjee B, Patra B, Mahapatra S, Banerjee P, Tiwari A, Chatterjee M. Vanadium--an element of atypical biological significance. Toxicol Lett 2004; 150:135-43. [PMID: 15093669 DOI: 10.1016/j.toxlet.2004.01.009] [Citation(s) in RCA: 207] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2003] [Revised: 12/18/2003] [Accepted: 01/20/2004] [Indexed: 11/30/2022]
Abstract
The biological image of the transition element vanadium ferments a great deal of contradiction-from toxicity to essentiality. Importance of this element as micro-nutrient is yet to be unequivocally accepted by biologists and biomedical scientists. In spite of toxicity, it seems interesting to analyze the different biological roles of the element. Vanadium compounds have been proven to be associated with various implications in the pathogenesis of some human diseases and also in maintaining normal body functions. Salts of vanadium interfere with an essential array of enzymatic systems such as different ATPases, protein kinases, ribonucleases and phosphatases. While vanadium deficiency accounts for several physiological malfunctionings including thyroid, glucose and lipid metabolism, etc., several genes are regulated by this element or by its compounds, which include genes for tumor necrosis factor-alpha (TNF-alpha), Interleukin-8 (IL-8), activator protein-1 (AP-1), ras, c-raf-1, mitogen activated protein kinase (MAPK), p53, nuclear factors-kappaB, etc. All these seem to be not far from its recognition as an element of pharmacological and nutritional significance, which is revealed through its increasing therapeutic uses in diabetes. Vanadium is also emerging as a potent anti-carcinogenic agent. This review summarizes the developments related to vanadium biology as a whole by analyzing the general biochemical functions of vanadium.
Collapse
Affiliation(s)
- Biswajit Mukherjee
- Department of Pharmaceutical Technology, Jadavpur University, Kolkata 700032, India.
| | | | | | | | | | | |
Collapse
|
50
|
Bonnefont-Rousselot D. The Role of Antioxidant Micronutrients in the Prevention of Diabetic Complications. ACTA ACUST UNITED AC 2004; 3:41-52. [PMID: 15743112 DOI: 10.2165/00024677-200403010-00005] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Diabetes mellitus is associated with an increased production of reactive oxygen species and a reduction in antioxidant defenses. This leads to oxidative stress, which is partly responsible for diabetic complications. Tight glycemic control is the most effective way of preventing or decreasing these complications. Nevertheless, antioxidant micronutrients can be proposed as adjunctive therapy in patients with diabetes. Indeed, some minerals and vitamins are able to indirectly participate in the reduction of oxidative stress in diabetic patients by improving glycemic control and/or are able to exert antioxidant activity. This article reviews the use of minerals (vanadium, chromium, magnesium, zinc, selenium, copper) and vitamins or cofactors (tocopherol [vitamin E], ascorbic acid [vitamin C], ubidecarenone [ubiquinone; coenzyme Q], nicotinamide, riboflavin, thioctic acid [lipoic acid], flavonoids) in diabetes, with a particular focus on the prevention of diabetic complications. Results show that dietary supplementation with micronutrients may be a complement to classical therapies for preventing and treating diabetic complications. Supplementation is expected to be more effective when a deficiency in these micronutrients exists. Nevertheless, many clinical studies have reported beneficial effects in individuals without deficiencies, although several of these studies were short term and had small sample sizes. However, a randomized, double-blind, placebo-controlled, multicenter trial showed that thioctic acid at an oral dosage of 800 mg/day for 4 months significantly improved cardiac autonomic neuropathy in type 2 diabetic patients. Above all, individuals with diabetes should be educated about the importance of consuming adequate amounts of vitamins and minerals from natural food sources, within the constraints of recommended sugar and carbohydrate intake.
Collapse
|