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Semiz S. Vanadium as potential therapeutic agent for COVID-19: A focus on its antiviral, antiinflamatory, and antihyperglycemic effects. J Trace Elem Med Biol 2022; 69:126887. [PMID: 34798510 PMCID: PMC8555110 DOI: 10.1016/j.jtemb.2021.126887] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 10/20/2021] [Accepted: 10/22/2021] [Indexed: 12/13/2022]
Abstract
An increasing evidence suggests that vanadium compounds are novel potential drugs in the treatment of diabetes, atherosclerosis, and cancer. Vanadium has also demonstrated activities against RNA viruses and is a promising candidate for treating acute respiratory diseases. The antidiabetic, antihypertensive, lipid-lowering, cardioprotective, antineoplastic, antiviral, and other potential effects of vanadium are summarized here. Given the beneficial antihyperglycemic and antiinflammatory effects as well as the potential mechanistic link between the COVID-19 and diabetes, vanadium compounds could be considered as a complement to the prescribed treatment of COVID-19. Thus, further clinical trials are warranted to confirm these favorable effects of vanadium treatment in COVID-19 patients, which appear not to be studied yet.
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Affiliation(s)
- Sabina Semiz
- College of Medicine and Health Sciences, Khalifa University, Abu Dhabi, United Arab Emirates; Association South East European Network for Medical Research-SOVE.
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2
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Synthesis, structure, and cytotoxicity studies of oxidovanadium(IV and V) complexes bearing chelating phenolates. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.06.051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Costa BC, Tokuhara CK, Rocha LA, Oliveira RC, Lisboa-Filho PN, Costa Pessoa J. Vanadium ionic species from degradation of Ti-6Al-4V metallic implants: In vitro cytotoxicity and speciation evaluation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 96:730-739. [DOI: 10.1016/j.msec.2018.11.090] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 10/21/2018] [Accepted: 11/30/2018] [Indexed: 11/30/2022]
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Abstract
Ultra-trace elements or occasionally beneficial elements (OBE) are the new categories of minerals including vanadium (V). The importance of V is attributed due to its multifaceted biological roles, i.e., glucose and lipid metabolism as an insulin-mimetic, antilipemic and a potent stress alleviating agent in diabetes when vanadium is administered at lower doses. It competes with iron for transferrin (binding site for transportation) and with lactoferrin as it is secreted in milk also. The intracellular enzyme protein tyrosine phosphatase, causing the dephosphorylation at beta subunit of the insulin receptor, is inhibited by vanadium, thus facilitating the uptake of glucose inside the cell but only in the presence of insulin. Vanadium could be useful as a potential immune-stimulating agent and also as an antiinflammatory therapeutic metallodrug targeting various diseases. Physiological state and dose of vanadium compounds hold importance in causing toxicity also. Research has been carried out mostly on laboratory animals but evidence for vanadium importance as a therapeutic agent are available in humans and large animals also. This review examines the potential biochemical and molecular role, possible kinetics and distribution, essentiality, immunity, and toxicity-related study of vanadium in a biological system.
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Affiliation(s)
| | - Veena Mani
- National Dairy Research Institute, Karnal, Haryana, India
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Pal RP, Mani V, Tripathi D, Datt C. Inorganic Vanadium Supplementation in Crossbred Calves: Effects on Antioxidant Status, Immune Response and Haemato-Biochemical Attributes. Biol Trace Elem Res 2018; 186:154-161. [PMID: 29550952 DOI: 10.1007/s12011-018-1295-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 02/28/2018] [Indexed: 12/23/2022]
Abstract
The aim of the study was to assess the effect of inorganic vanadium (V) supplementation on antioxidant enzymes, immune status, and haemato-biochemical attributes of growing crossbred calves. Twenty-four male Karan Fries calves (Tharparkar × Holstein Friesian) (initial body mass 72.83 ± 2.5 kg; age 3-9 month) were randomly allocated to four groups: the control (received basal diet devoid of supplemental V), the 3 ppm (received basal diet with 3 mg/kg V), the 6 ppm (received basal diet with 6 mg/kg V) and the 9 ppm group (received basal diet with 9 mg/kg V). All the calves were fed for 150 days as per ICAR (2013) feeding standards to meet their nutrient requirements for 500 g growth rate/day. Peripheral blood samples were collected at the start of experiment and subsequently at 30, 60, 90, 120 and 150 days post-V supplementation for determination of antioxidant enzyme activity, immunological parameters and haemato-biochemical attributes. Results indicated that dietary supplementation of V did not affect daily gain, feed intake and haematological parameters. Crossbred calves fed with 9 mg V/kg diet showed reduced (P < 0.05) plasma total cholesterol concentration; however, plasma total protein and glucose concentration remained unaltered. Glutathione peroxidase (GPx) activity as well as immunoglobulin G (IgG) concentration was significantly (P < 0.05) higher in group supplemented with 9 mg V/kg DM; however, superoxide dismutase (SOD), catalase activity and total plasma immunoglobulin (Ig) concentration were similar in all experimental group. Dietary V supplementation showed a negative relation with plasma thiobarbituric acid reactive substances (TBARS) concentration, whereas non-esterified fatty acid (NEFA) concentration remained unaltered among all groups. Plasma V level increased (P < 0.05) with increasing dietary V levels without affecting levels of Ca, Mg, Fe, Cu and Zn. In conclusion, a dietary addition of 9 mg V/kg DM reduced cholesterol content and improved antioxidant and immune response in growing crossbred calves.
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Affiliation(s)
- Ravi Prakash Pal
- Animal Nutrition Division, ICAR-National Dairy Research Institute, Karnal, 132001, India
| | - Veena Mani
- Animal Nutrition Division, ICAR-National Dairy Research Institute, Karnal, 132001, India.
| | - Deepika Tripathi
- Animal Nutrition Division, ICAR-National Dairy Research Institute, Karnal, 132001, India
| | - Chander Datt
- Animal Nutrition Division, ICAR-National Dairy Research Institute, Karnal, 132001, India
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Del Carpio E, Hernández L, Ciangherotti C, Villalobos Coa V, Jiménez L, Lubes V, Lubes G. Vanadium: History, chemistry, interactions with α-amino acids and potential therapeutic applications. Coord Chem Rev 2018; 372:117-140. [PMID: 32226092 PMCID: PMC7094547 DOI: 10.1016/j.ccr.2018.06.002] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 06/03/2018] [Indexed: 12/11/2022]
Abstract
In the last 30 years, since the discovery that vanadium is a cofactor found in certain enzymes of tunicates and possibly in mammals, different vanadium-based drugs have been developed targeting to treat different pathologies. So far, the in vitro studies of the insulin mimetic, antitumor and antiparasitic activity of certain compounds of vanadium have resulted in a great boom of its inorganic and bioinorganic chemistry. Chemical speciation studies of vanadium with amino acids under controlled conditions or, even in blood plasma, are essential for the understanding of the biotransformation of e.g. vanadium antidiabetic complexes at the physiological level, providing clues of their mechanism of action. The present article carries out a bibliographical research emphaticizing the chemical speciation of the vanadium with different amino acids and reviewing also some other important aspects such as its chemistry and therapeutical applications of several vanadium complexes.
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Key Words
- 2,2′-bipy, 2,2-bipyridine
- 6-mepic, 6-methylpicolinic acid
- Ad, adenosine
- Ala, alanine
- Ala-Gly, alanylglycine
- Ala-His, alanylhistidine
- Ala-Ser, alanylserine
- Amino acids
- Antidiabetics
- Antitumors
- Asp, aspartic acid
- BEOV, bis(ethylmaltolate)oxovanadium(IV)
- Chemical speciation
- Cys, cysteine
- Cyt, citrate
- DMF, N,N-dimethylformamide
- DNA, deoxyribonucleic acid
- EPR, Electron Paramagnetic Resonance
- G, Gauss
- Glu, glutamic acid
- Gly, glycine
- GlyAla, glycylalanine
- GlyGly, glycylglycine
- GlyGlyCys, glycylglycylcysteine
- GlyGlyGly, glycylglycylglycine
- GlyGlyHis, glycylglycylhistidine
- GlyPhe, glycylphenylalanine
- GlyTyr, glycyltyrosine
- GlyVal, glycylvaline
- HIV, human immunodeficiency virus
- HSA, albumin
- Hb, hemoglobin
- His, histidine
- HisGlyGly, histidylglycylglycine
- Ig, immunoglobulins
- Im, imidazole
- L-Glu(γ)HXM, l-glutamic acid γ-monohydroxamate
- LD50, the amount of a toxic agent (such as a poison, virus, or radiation) that is sufficient to kill 50 percent of population of animals
- Lac, lactate
- MeCN, acetonitrile
- NADH and NAD+, nicotinamide adenine dinucleotide
- NEP, neutral endopeptidas
- NMR, Nuclear Magnetic Resonance
- Ox, oxalate
- PI3K, phosphoinositide 3-kinase
- PTP1B, protein tyrosine phosphatase 1B
- Pic, picolinic acid
- Pro, proline
- Pro-Ala, prolylalanine
- RNA, ribonucleic acid
- SARS, severe acute respiratory syndrome
- Sal-Ala, N-salicylidene-l-alaninate
- SalGly, salicylglycine
- SalGlyAla, salicylglycylalanine
- Ser, serine
- T, Tesla
- THF, tetrahydrofuran
- Thr, threonine
- VBPO, vanadium bromoperoxidases
- VanSer, Schiff base formed from o-vanillin and l-serine
- Vanadium complexes
- acac, acetylacetone
- dhp, 1,2-dimethyl-3-hydroxy-4(1H)-pyridinone
- dipic, dipicolinic acid
- dmpp, 1,2-dimethyl-3-hydroxy-4-pyridinonate
- hTf, transferring
- hpno, 2-hydroxypyridine-N-oxide
- l.m.m., low molecular mass
- mal, maltol
- py, pyridine
- sal-l-Phe, N-salicylidene-l-tryptophanate
- salGlyGly, N-salicylideneglycylglycinate
- salSer, N-salicylideneserinate
- salTrp, N-salicylidene-L tryptophanate
- salVal, N-salicylidene-l-valinate
- salophen, N,N′-bis(salicylidene)-o-phenylenediamine
- saltrp, N-salicylidene-l-tryptophanate
- γ-PGA, poly-γ-glutamic acid
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Affiliation(s)
- Edgar Del Carpio
- Laboratorio de Equilibrios en Solución, Universidad Simón Bolívar (USB), Apartado 89000, Caracas 1080 A, Venezuela
- Unidad de Química Medicinal, Facultad de Farmacia, Escuela “Dr. Jesús María Bianco”, Universidad Central de Venezuela, Venezuela
| | - Lino Hernández
- Laboratorio de Equilibrios en Solución, Universidad Simón Bolívar (USB), Apartado 89000, Caracas 1080 A, Venezuela
- Escuela de Quimica, Facultad de Ciencias, Universidad Central de Venezuela, Venezuela
| | - Carlos Ciangherotti
- Laboratorio de Neuropéptidos, Facultad de Farmacia, Escuela “Dr. Jesús María Bianco”, Universidad Central de Venezuela, Venezuela
- Laboratorio de Bioquímica, Facultad de Farmacia, Escuela “Dr. Jesús María Bianco”, Universidad Central de Venezuela, Venezuela
| | - Valentina Villalobos Coa
- Laboratorio de Equilibrios en Solución, Universidad Simón Bolívar (USB), Apartado 89000, Caracas 1080 A, Venezuela
| | - Lissette Jiménez
- Facultad de ingeniería Química, Universidad de Carabobo, Venezuela
| | - Vito Lubes
- Laboratorio de Equilibrios en Solución, Universidad Simón Bolívar (USB), Apartado 89000, Caracas 1080 A, Venezuela
| | - Giuseppe Lubes
- Laboratorio de Equilibrios en Solución, Universidad Simón Bolívar (USB), Apartado 89000, Caracas 1080 A, Venezuela
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Zhang Y, Wang L, Zeng K, Wang K, Yang X. Vanadyl complexes discriminate between neuroblastoma cells and primary neurons by inducing cell-specific apoptotic pathways. J Inorg Biochem 2018; 188:76-87. [PMID: 30121400 DOI: 10.1016/j.jinorgbio.2018.08.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 07/27/2018] [Accepted: 08/02/2018] [Indexed: 12/11/2022]
Abstract
Vanadium compounds have arisen as potential therapeutic agent for the treatment of cancers over the past decades. A few studies suggested that vanadyl complexes may discriminate between the cancerous and the normal cells. Here, we reported the investigation on the pro-apoptotic effect and the underlying mechanism of bis(acetylacetonato) oxovanadium(IV) ([VO(acac)2]) on SH-SY5Y neuroblastoma cells in comparison with that of mouse primary cortex neurons. The experimental results revealed that [VO(acac)2] showed about 10-fold higher cytotoxicity (IC50 ~16 μM) on the neuroblastoma cells than on normal neurons (IC50 ~250 μM). Further analysis indicated that the vanadyl complex suppressed the growth of neuroblastoma cells via different pathways depending on its concentration. It induced a special cyclin D-mediated and p53-independent cell apoptosis at <50 μM but cell cycle arrests at >50 μM. In contrast, [VO(acac)2] promoted cell viability of primary neurons in the concentration range of 0-150 μM; while [VO(acac)2] at hundreds of μM would cause neuronal death possibly via the reactive oxygen species (ROS)-mediated signal pathways. The extraordinary discrimination between neuroblastoma cells and primary neurons suggests potential application of vanadyl complexes for therapeutic treatment of neuroblastoma. In addition, the p53-independent apoptotic pathways induced by vanadyl complexes may provide new insights for future discovery of new anticancer drugs overcoming the chemo-resistance due to p53 mutation.
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Affiliation(s)
- Yue Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Science, Peking University Health Science Center, Beijing 100191, PR China; Department of Chemical Biology, School of Pharmaceutical Science, Peking University Health Science Center, Beijing 100191, PR China
| | - Lichao Wang
- Department of Chemical Biology, School of Pharmaceutical Science, Peking University Health Science Center, Beijing 100191, PR China
| | - Kewu Zeng
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Science, Peking University Health Science Center, Beijing 100191, PR China; Department of Natural Medicines, School of Pharmaceutical Science, Peking University Health Science Center, Beijing 100191, PR China.
| | - Kui Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Science, Peking University Health Science Center, Beijing 100191, PR China; Department of Chemical Biology, School of Pharmaceutical Science, Peking University Health Science Center, Beijing 100191, PR China
| | - Xiaoda Yang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Science, Peking University Health Science Center, Beijing 100191, PR China; Department of Chemical Biology, School of Pharmaceutical Science, Peking University Health Science Center, Beijing 100191, PR China.
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8
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Jiang P, Liu Q, Ni Z, Wei Q, Li X, Xing S, Kong D, Li M. Primary study on the toxic mechanism of vanadyl trehalose in Kunming mice. Regul Toxicol Pharmacol 2018; 94:1-7. [PMID: 29305949 DOI: 10.1016/j.yrtph.2017.12.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Revised: 12/27/2017] [Accepted: 12/31/2017] [Indexed: 12/12/2022]
Abstract
It has been shown that vanadyl trehalose could lower blood glucose but show mild toxicity to the stomach and intestine in diabetic Kunming mice. We analysed antioxidant levels, pro-inflammatory cytokine expression, apoptosis factors and intestinal microflora alteration to explore the mechanism of vanadyl trehalose toxicity in Kunming mice. The results revealed that oral administration of vanadyl trehalose at tested dose caused significant changes in oxidative stress factor (MDA levels elevated but SOD and T-AOC decreased), expression of inflammatory factor (IL-1β, COX-2, TNF-α and iNOS increased), and apoptosis factor (Bcl-2/Bax decreased and caspase-3 increased), and intestinal microflora dysbiosis (the number of Enterobacteriaceae and Enterococcus increased and Lactobacillus and Bifidobacterium decreased) relative to the control of Kunming mice. These results suggest that the toxic mechanisms of vanadyl trehalose on the stomach and intestine likely involve activation of the oxidative stress system, increased inflammatory response, promotion of apoptosis and the disruption of the normal intestinal microflora.
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Affiliation(s)
- Pingzhe Jiang
- Key Laboratory for Bioactive Materials of the Ministry of Education, Institute of Molecular Biology, College of Life Science, Nankai University, 300071, Tianjin, China; State Key Laboratory of Medicinal Chemical Biology, Nankai University, 300071, Tianjin, China
| | - Qiqi Liu
- Key Laboratory for Bioactive Materials of the Ministry of Education, Institute of Molecular Biology, College of Life Science, Nankai University, 300071, Tianjin, China; State Key Laboratory of Medicinal Chemical Biology, Nankai University, 300071, Tianjin, China
| | - Zaizhong Ni
- Key Laboratory for Bioactive Materials of the Ministry of Education, Institute of Molecular Biology, College of Life Science, Nankai University, 300071, Tianjin, China; State Key Laboratory of Medicinal Chemical Biology, Nankai University, 300071, Tianjin, China
| | - Qian Wei
- Key Laboratory for Bioactive Materials of the Ministry of Education, Institute of Molecular Biology, College of Life Science, Nankai University, 300071, Tianjin, China; State Key Laboratory of Medicinal Chemical Biology, Nankai University, 300071, Tianjin, China
| | - Xiaodan Li
- Key Laboratory for Bioactive Materials of the Ministry of Education, Institute of Molecular Biology, College of Life Science, Nankai University, 300071, Tianjin, China; State Key Laboratory of Medicinal Chemical Biology, Nankai University, 300071, Tianjin, China
| | - Shuguang Xing
- Key Laboratory for Bioactive Materials of the Ministry of Education, Institute of Molecular Biology, College of Life Science, Nankai University, 300071, Tianjin, China; State Key Laboratory of Medicinal Chemical Biology, Nankai University, 300071, Tianjin, China
| | - Deling Kong
- Key Laboratory for Bioactive Materials of the Ministry of Education, Institute of Molecular Biology, College of Life Science, Nankai University, 300071, Tianjin, China; State Key Laboratory of Medicinal Chemical Biology, Nankai University, 300071, Tianjin, China
| | - Minggang Li
- Key Laboratory for Bioactive Materials of the Ministry of Education, Institute of Molecular Biology, College of Life Science, Nankai University, 300071, Tianjin, China; State Key Laboratory of Medicinal Chemical Biology, Nankai University, 300071, Tianjin, China.
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9
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Khalil AA, Jameson MJ. Sodium Orthovanadate Inhibits Proliferation and Triggers Apoptosis in Oral Squamous Cell Carcinoma in vitro. BIOCHEMISTRY (MOSCOW) 2017; 82:149-155. [PMID: 28320298 DOI: 10.1134/s0006297917020067] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Sodium orthovanadate (SOV) is a general inhibitor of tyrosine phosphatases, a large family of enzymes that catalyze the removal of phosphate groups from tyrosine residues. SOV is commonly used in the laboratory to preserve the protein tyrosyl phosphorylation state of proteins under study. It has shown promising antineoplastic activity in some human cancer cell lines; this effect has not been fully investigated in head and neck squamous cell carcinoma. In this study, the effect of SOV on cell growth, proliferation, viability, and apoptosis was assessed in Cal27 cells, an oral squamous cell carcinoma (OSCC) cell line. SOV exhibited dose-dependent inhibition of cell growth and decrease in cell viability and colony formation. The IC50 values for treatment lasting 72 h and 7 days were 25 and 10 µM, respectively. The cytotoxic effect of the drug was associated with poly(ADP-ribose)polymerase cleavage detected by immunoblot. Flow cytometry of Cal27 cells stained with annexin V-FITC and propidium iodide showed a dose-dependent increase in apoptosis that reached approximately 40% at 25 µM SOV. These findings demonstrate that SOV has in vitro antiproliferative and proapoptotic effect on OSCC cells.
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Affiliation(s)
- A A Khalil
- University of Virginia Health System, Division of Head and Neck Oncologic and Microvascular Surgery, Department of Otolaryngology, Head and Neck Surgery, Virginia, USA.
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10
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Cong XQ, Piao MH, Li Y, Xie L, Liu Y. Bis(maltolato)oxovanadium(IV) (BMOV) Attenuates Apoptosis in High Glucose-Treated Cardiac Cells and Diabetic Rat Hearts by Regulating the Unfolded Protein Responses (UPRs). Biol Trace Elem Res 2016; 173:390-8. [PMID: 26983714 DOI: 10.1007/s12011-016-0668-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 03/06/2016] [Indexed: 12/12/2022]
Abstract
Endoplasmic reticulum stress (ERS)-induced unfolded protein response (UPR) and the subsequent cell deaths are essential steps in the pathogenesis of diabetic cardiomyopathy (DCM), a main cause of diabetics' morbidity and mortalities. The bis(maltolato)oxovanadium(IV) (BMOV), a potent oral vanadium complex with anti-diabetic properties and insulin-mimicking effects, was shown to improve cardiac dysfunctions in diabetic models. Here, we examined the effects of BMOV on UPR pathway protein expression and apoptotic cell deaths in both high glucose-treated cardiac H9C2 cells and in the hearts of diabetic rats. We show that in both the high glucose-treated cardiac cells and in the hearts of streptozotocin (STZ) diabetic rats, there was an overall activation of the UPR signaling, including both apoptotic (e.g., the cascades of PERK/EIf2α/ATF4/CHOP and of IRE1/caspase 12/caspase 3) and pro-survival (GRP78 and XBP1) signaling. A high amount of apoptotic cell deaths was also detected in both diabetic conditions. The administration of BMOV suppressed both the apoptotic and pro-survival UPR signaling and significantly attenuated apoptotic cell deaths in both conditions. The overall suppression of UPR signaling by BMOV suggests that the drug protects diabetic cardiomyopathy by counteracting reactive oxygen species (ROS) and endoplasmic reticulum (ER) stress. Our findings lend support to promote the use of BMOV in the treatment of diabetic heart diseases.
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Affiliation(s)
- Xiao-Qiang Cong
- Department of Cardiology, Bethune First Hospital of Jilin University, 71 Xinmin St., Chaoyang District, ChangChun, 130021, China.
| | - Mei-Hua Piao
- Department of Anesthesiology, Bethune First Hospital of Jilin University, 71 Xinmin St., Chaoyang District, Changchun, Jilin, 130021, China
| | - Ying Li
- The People's Hospital of Jilin Province, Changchun, 130021, China
| | - Lin Xie
- School of Public Health, Jilin University, Changchun, 130021, China
| | - Ya Liu
- School of Public Health, Jilin University, Changchun, 130021, China
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11
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Rodriguez-Lara V, Muñiz-Rivera Cambas A, González Villalva A, Fortoul TI. Sex-based differences in lymphocyte proliferation in the spleen after vanadium inhalation. J Immunotoxicol 2016; 13:498-508. [DOI: 10.3109/1547691x.2015.1134731] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Vianey Rodriguez-Lara
- Department of Cellular and Tissue Biology, Faculty of Medicine, Universidad Nacional Autonoma de Mexico, C.U., México City, México
| | - Angelica Muñiz-Rivera Cambas
- Department of Cellular and Tissue Biology, Faculty of Medicine, Universidad Nacional Autonoma de Mexico, C.U., México City, México
| | - Adriana González Villalva
- Department of Cellular and Tissue Biology, Faculty of Medicine, Universidad Nacional Autonoma de Mexico, C.U., México City, México
| | - Teresa I. Fortoul
- Department of Cellular and Tissue Biology, Faculty of Medicine, Universidad Nacional Autonoma de Mexico, C.U., México City, México
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12
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Zhang H, Forman HJ. 4-Hydroxynonenal activates Src through a non-canonical pathway that involves EGFR/PTP1B. Free Radic Biol Med 2015; 89:701-7. [PMID: 26453921 PMCID: PMC4684732 DOI: 10.1016/j.freeradbiomed.2015.08.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 08/20/2015] [Accepted: 08/26/2015] [Indexed: 12/30/2022]
Abstract
Src, a non-receptor protein tyrosine kinase involved in many biological processes, can be activated through both redox-dependent and independent mechanisms. 4-Hydroxy-2-nonenal (HNE) is a lipid peroxidation product that is increased in pathophysiological conditions associated with Src activation. This study examined how HNE activates human c-Src. In the canonical pathway Src activation is initiated by dephosphorylation of pTyr530 followed by conformational change that causes Src auto-phosphorylation at Tyr419 and its activation. HNE increased Src activation in both dose- and time-dependent manner, while it also increased Src phosphorylation at Tyr530 (pTyr530 Src), suggesting that HNE activated Src via a non-canonical mechanism. Protein tyrosine phosphatase 1B inhibitor (539741), at concentrations that increased basal pTyr530 Src, also increased basal Src activity and significantly reduced HNE-mediated Src activation. The EGFR inhibitor, AG1478, and EGFR silencing, abrogated HNE-mediated EGFR activation and inhibited basal and HNE-induced Src activity. In addition, AG1478 also eliminated the increase of basal Src activation by a PTP1B inhibitor. Taken together these data suggest that HNE can activate Src partly through a non-canonical pathway involving activation of EGFR and inhibition of PTP1B.
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Affiliation(s)
- Hongqiao Zhang
- Andrus Gerontology Center, Davis School of Gerontology, University of Southern, California
| | - Henry Jay Forman
- Andrus Gerontology Center, Davis School of Gerontology, University of Southern, California.
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Reinhard FBM, Eberhard D, Werner T, Franken H, Childs D, Doce C, Savitski MF, Huber W, Bantscheff M, Savitski MM, Drewes G. Thermal proteome profiling monitors ligand interactions with cellular membrane proteins. Nat Methods 2015; 12:1129-31. [PMID: 26524241 DOI: 10.1038/nmeth.3652] [Citation(s) in RCA: 202] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 10/06/2015] [Indexed: 12/15/2022]
Abstract
We extended thermal proteome profiling to detect transmembrane protein-small molecule interactions in cultured human cells. When we assessed the effects of detergents on ATP-binding profiles, we observed shifts in denaturation temperature for ATP-binding transmembrane proteins. We also observed cellular thermal shifts in pervanadate-induced T cell-receptor signaling, delineating the membrane target CD45 and components of the downstream pathway, and with drugs affecting the transmembrane transporters ATP1A1 and MDR1.
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Affiliation(s)
| | - Dirk Eberhard
- Cellzome GmbH, Molecular Discovery Research, GlaxoSmithKline, Heidelberg, Germany
| | - Thilo Werner
- Cellzome GmbH, Molecular Discovery Research, GlaxoSmithKline, Heidelberg, Germany
| | - Holger Franken
- Cellzome GmbH, Molecular Discovery Research, GlaxoSmithKline, Heidelberg, Germany
| | - Dorothee Childs
- Cellzome GmbH, Molecular Discovery Research, GlaxoSmithKline, Heidelberg, Germany.,Genome Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Carola Doce
- Cellzome GmbH, Molecular Discovery Research, GlaxoSmithKline, Heidelberg, Germany
| | - Maria Fälth Savitski
- Cellzome GmbH, Molecular Discovery Research, GlaxoSmithKline, Heidelberg, Germany
| | - Wolfgang Huber
- Genome Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Marcus Bantscheff
- Cellzome GmbH, Molecular Discovery Research, GlaxoSmithKline, Heidelberg, Germany
| | - Mikhail M Savitski
- Cellzome GmbH, Molecular Discovery Research, GlaxoSmithKline, Heidelberg, Germany
| | - Gerard Drewes
- Cellzome GmbH, Molecular Discovery Research, GlaxoSmithKline, Heidelberg, Germany
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ISLAM NASHREENS, BORUAH JEENAJYOTI. Macromolecular peroxo complexes of Vanadium(V) and Molybdenum(VI): Catalytic activities and biochemical relevance. J CHEM SCI 2015. [DOI: 10.1007/s12039-015-0833-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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15
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Imtiaz M, Rizwan MS, Xiong S, Li H, Ashraf M, Shahzad SM, Shahzad M, Rizwan M, Tu S. Vanadium, recent advancements and research prospects: A review. ENVIRONMENT INTERNATIONAL 2015; 80:79-88. [PMID: 25898154 DOI: 10.1016/j.envint.2015.03.018] [Citation(s) in RCA: 201] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Revised: 03/10/2015] [Accepted: 03/29/2015] [Indexed: 06/04/2023]
Abstract
Metal pollution is an important issue worldwide, with various documented cases of metal toxicity in mining areas, industries, coal power plants and agriculture sector. Heavy metal polluted soils pose severe problems to plants, water resources, environment and nutrition. Among all non-essential metals, vanadium (V) is becoming a serious matter of discussion for the scientists who deals with heavy metals. Due to its mobility from soil to plants, it causes adverse effects to human beings. This review article illustrates briefly about V, its role and shows the progress about V research so far done globally in the light of the previous work which may assist in inter-disciplinary studies to evaluate the ecological importance of V toxicity.
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Affiliation(s)
- Muhammad Imtiaz
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, PR China.
| | - Muhammad Shahid Rizwan
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, PR China.
| | - Shuanglian Xiong
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, PR China.
| | - Hailan Li
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, PR China.
| | - Muhammad Ashraf
- Department of Soil and Environmental Sciences, University College of Agriculture, University of Sargodha, University Road, Sargodha, Punjab 40100, Pakistan.
| | - Sher Muhammad Shahzad
- Department of Soil and Environmental Sciences, University College of Agriculture, University of Sargodha, University Road, Sargodha, Punjab 40100, Pakistan.
| | - Muhammad Shahzad
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, PR China.
| | - Muhammad Rizwan
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, PR China.
| | - Shuxin Tu
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, PR China.
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Tinkov AA, Sinitskii AI, Popova EV, Nemereshina ON, Gatiatulina ER, Skalnaya MG, Skalny AV, Nikonorov AA. Alteration of local adipose tissue trace element homeostasis as a possible mechanism of obesity-related insulin resistance. Med Hypotheses 2015; 85:343-7. [PMID: 26112161 DOI: 10.1016/j.mehy.2015.06.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 06/16/2015] [Indexed: 01/12/2023]
Abstract
The mechanisms of association between obesity and the related metabolic disturbances in general and insulin resistance in particular are extensively studied. Taking into account a key role of adipose tissue insulin resistance in the development of systemic obesity-related insulin resistance, the estimation of mechanisms linking increased adiposity and impaired insulin signaling in adipocytes will allow to develop novel prophylactic and therapeutic approaches to treatment of these states. A number of trace elements like chromium, zinc, and vanadium have been shown to take part in insulin signaling via various mechanisms. Taking into account a key role of adipocyte in systemic carbohydrate homeostasis it can be asked if trace element homeostasis in adipose tissue may influence regulatory mechanisms of glucose metabolism. We hypothesize that caloric excess through currently unknown mechanisms results in decreased chromium, vanadium, and zinc content in adipocytes. Decreased content of trace elements in the adipose tissue causes impairment of intra-adipocyte insulin signaling subsequently leading to adipose tissue insulin resistance. The latter significantly contributes to systemic insulin resistance and further metabolic disruption in obesity. It is also possible that decreased adipose tissue trace element content is associated with dysregulation of insulin-sensitizing and proinflammatory adipokines also leading to insulin resistance. We hypothesize that insulin resistance and adipokine dysbalance increase the severity of obesity subsequently aggravating alteration of adipose tissue trace element balance. Single indications of high relative adipose tissue trace element content, decreased Cr, V, and Zn content in obese adipose tissue, and tight association between fat tissue chromium, vanadium, and zinc levels and metabolic parameters in obesity may be useful for hypothesis validation. If our hypothesis will be confirmed by later studies, adipose tissue chromium, vanadium, and zinc content may be used as a prognostic biomarker of metabolic disturbances in obesity. Hypothetically, development and approbation of drugs increasing adipose tissue chromium, vanadium, and zinc content may help to achieve better metabolic control in obesity and obesity-related insulin resistance. However, stronger basis is required to prove our hypothesis. In particular, future studies should investigate the influence of obesity severity of adipose tissue trace element content, estimate the association between adipose tissue metals and metabolic parameters, and highlight the mechanisms involved in these changes. Both in vivo and in vitro studies are required to support the hypothesis.
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Affiliation(s)
- Alexey A Tinkov
- Laboratory of Biotechnology and Applied Bioelementology, Yaroslavl State University, Sovetskaya St., 14, Yaroslavl 150000, Russia; Department of Biochemistry, Orenburg State Medical University, Sovetskaya St., 6, Orenburg 460000, Russia; Russian Society of Trace Elements in Medicine, ANO "Centre for Biotic Medicine", Zemlyanoy Val St. 46, Moscow 105064, Russia.
| | - Anton I Sinitskii
- Department of Chemistry of the Pharmaceutical Faculty, South Ural State Medical University, Vorovskogo St., 64, Chelyabinsk 453092, Russia
| | - Elizaveta V Popova
- Department of Biochemistry, Orenburg State Medical University, Sovetskaya St., 6, Orenburg 460000, Russia
| | - Olga N Nemereshina
- Department of Biochemistry, Orenburg State Medical University, Sovetskaya St., 6, Orenburg 460000, Russia
| | - Evgenia R Gatiatulina
- Department of Biochemistry, Orenburg State Medical University, Sovetskaya St., 6, Orenburg 460000, Russia
| | - Margarita G Skalnaya
- Institute of Bioelementology (Russian Satellite Centre of Trace Element - Institute for UNESCO), Orenburg State University, Pobedy Ave. 13, Orenburg 460352, Russia; Russian Society of Trace Elements in Medicine, ANO "Centre for Biotic Medicine", Zemlyanoy Val St. 46, Moscow 105064, Russia
| | - Anatoly V Skalny
- Laboratory of Biotechnology and Applied Bioelementology, Yaroslavl State University, Sovetskaya St., 14, Yaroslavl 150000, Russia; Institute of Bioelementology (Russian Satellite Centre of Trace Element - Institute for UNESCO), Orenburg State University, Pobedy Ave. 13, Orenburg 460352, Russia; Russian Society of Trace Elements in Medicine, ANO "Centre for Biotic Medicine", Zemlyanoy Val St. 46, Moscow 105064, Russia
| | - Alexandr A Nikonorov
- Department of Biochemistry, Orenburg State Medical University, Sovetskaya St., 6, Orenburg 460000, Russia; Russian Society of Trace Elements in Medicine, ANO "Centre for Biotic Medicine", Zemlyanoy Val St. 46, Moscow 105064, Russia
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17
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Cullen S, Ponnappan S, Ponnappan U. Redox-regulated pathway of tyrosine phosphorylation underlies NF-κB induction by an atypical pathway independent of the 26S proteasome. Biomolecules 2015; 5:95-112. [PMID: 25671697 PMCID: PMC4384113 DOI: 10.3390/biom5010095] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 11/25/2014] [Accepted: 01/28/2015] [Indexed: 12/21/2022] Open
Abstract
Alternative redox stimuli such as pervanadate or hypoxia/reoxygenation, induce transcription factor NF-κB by phospho-tyrosine-dependent and proteasome-independent mechanisms. While considerable attention has been paid to the absence of proteasomal regulation of tyrosine phosphorylated IκBα, there is a paucity of information regarding proteasomal regulation of signaling events distinct from tyrosine phosphorylation of IκBα. To delineate roles for the ubiquitin-proteasome pathway in the phospho-tyrosine dependent mechanism of NF-κB induction, we employed the proteasome inhibitor, Aclacinomycin, and the phosphotyrosine phosphatase inhibitor, pervanadate (PV). Results from these studies demonstrate that phospho-IκBα (Tyr-42) is not subject to proteasomal degradation in a murine stromal epithelial cell line, confirming results previously reported. Correspondingly, proteasome inhibition had no discernable effect on the key signaling intermediaries, Src and ERK1/2, involved in the phospho-tyrosine mechanisms regulating PV-mediated activation of NF-κB. Consistent with previous reports, a significant redox imbalance leading to the activation of tyrosine kinases, as occurs with pervanadate, is required for the induction of NF-κB. Strikingly, our studies demonstrate that proteasome inhibition can potentiate oxidative stress associated with PV-stimulation without impacting kinase activation, however, other cellular implications for this increase in intracellular oxidation remain to be fully delineated.
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Affiliation(s)
- Sarah Cullen
- Department of Microbiology and Immunology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
| | - Subramaniam Ponnappan
- Department of Geriatrics, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
| | - Usha Ponnappan
- Department of Microbiology and Immunology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
- Department of Geriatrics, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
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Zhang H, Davies KJA, Forman HJ. TGFβ1 rapidly activates Src through a non-canonical redox signaling mechanism. Arch Biochem Biophys 2015; 568:1-7. [PMID: 25585026 DOI: 10.1016/j.abb.2015.01.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 12/30/2014] [Accepted: 01/02/2015] [Indexed: 12/21/2022]
Abstract
Transforming growth factor-β1 (TGF-β) is involved in multiple cellular processes through Src activation. In the canonical pathway, Src activation is initiated by pTyr530 dephosphorylation followed by a conformational change allowing Tyr419 auto-phosphorylation. A non-canonical pathway in which oxidation of cysteine allows bypassing of pTyr530 dephosphorylation has been reported. Here, we examined how TGF-β activates Src in H358 cells, a small cell lung carcinoma cell line. TGF-β increased Src Tyr419 phosphorylation, but surprisingly, Tyr530 phosphorylation was increased rather than decreased. Vanadate, a protein tyrosine phosphatase inhibitor, stimulated Src activation itself, but rather than inhibiting Src activation by TGF-β, activation by vanadate was additive with TGF-β showing that pTyr530 dephosphorylation was not required. Thus, the involvement of the non-canonical oxidative activation was suspected. TGF-β increased extracellular H2O2 transiently while GSH-ester and catalase abrogated Src activation by TGF-β. Apocynin, a NADPH oxidase inhibitor, inhibited TGF-β-stimulated H2O2 production. Furthermore, mutation of cysteines to alanine, 248C/A, 277C/A, or 501C/A abrogated, while 490C/A significantly reduced, TGF-β-mediated Src activation. Taken together, the results indicate that TGF-β-mediated Src activation operates largely through a redox dependent mechanism, resulting from enhanced H2O2 production through an NADPH oxidase and that cysteines 248, 277, 490, and 501 are critical for this activation.
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Affiliation(s)
- Hongqiao Zhang
- Ethel Percy Andrus Gerontology Center, Leonard Davis School of Gerontology, The University of Southern California, United States
| | - Kelvin J A Davies
- Ethel Percy Andrus Gerontology Center, Leonard Davis School of Gerontology, The University of Southern California, United States; Division of Molecular & Computational Biology, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, The University of Southern California, United States
| | - Henry Jay Forman
- Ethel Percy Andrus Gerontology Center, Leonard Davis School of Gerontology, The University of Southern California, United States; School of Natural Science, The University of California, Merced, United States.
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19
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Trasande L, Urbina EM, Khoder M, Alghamdi M, Shabaj I, Alam MS, Harrison RM, Shamy M. Polycyclic aromatic hydrocarbons, brachial artery distensibility and blood pressure among children residing near an oil refinery. ENVIRONMENTAL RESEARCH 2015; 136:133-40. [PMID: 25460629 PMCID: PMC5274701 DOI: 10.1016/j.envres.2014.08.038] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Revised: 08/12/2014] [Accepted: 08/15/2014] [Indexed: 05/21/2023]
Abstract
BACKGROUND Polycyclic aromatic hydrocarbons (PAH) are produced by the burning and processing of fuel oils, and have been associated with oxidant stress, insulin resistance and hypertension in adults. Few studies have examined whether adolescents are susceptible to cardiovascular effects of PAHs. OBJECTIVE To study associations of PAH exposure with blood pressure (BP) and brachial artery distensibility (BAD), an early marker of arterial wall stiffness, in young boys attending three schools in Jeddah, Saudi Arabia in varying proximity to an oil refinery. METHODS Air samples collected from the three schools were analyzed for PAHs. PAH metabolites (total hydroxyphenanthrenes and 1-hydroxypyrene) were measured in urine samples from 184 adolescent males, in whom anthropometrics, heart rate, pulse pressure, brachial artery distensibility and blood pressure were measured. Descriptive, bivariate and multivariable analyses were performed to assess relationships of school location and urinary PAH metabolites with cardiovascular measures. RESULTS Total suspended matter was significantly higher (444 ± 143 μg/m(3)) at the school near the refinery compared to a school located near a ring road (395 ± 65 μg/m(3)) and a school located away from vehicle traffic (232 ± 137 μg/m(3)), as were PAHs. Systolic (0.47 S D units, p = 0.006) and diastolic (0.53 SD units, p < 0.001) BP Z-scores were highest at the school near the refinery, with a 4.36-fold increase in prehypertension (p = 0.001), controlling for confounders. No differences in pulse pressure, BAD and heart rate were noted in relationship to school location. Urinary total hydroxyphenanthrenes and 1-hydroxypyrene were not associated with cardiovascular outcomes. CONCLUSIONS Proximity to an oil refinery in Saudi Arabia is associated with prehypertension and increases in PAH and particulate matter exposures. Further study including insulin resistance measurements, better control for confounding, and longitudinal measurement is indicated.
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Affiliation(s)
- Leonardo Trasande
- Departments of Pediatrics, New York University School of Medicine, New York, NY, USA; Environmental Medicine, New York University School of Medicine, New York, NY, USA; Population Health, New York University School of Medicine, New York, NY, USA; New York University Wagner School of Public Service, New York, NY, USA; NYU Steinhardt School of Culture, Education and Human Development, Department of Nutrition, Food & Public Health, New York, NY, USA; Global Institute of Public Health, New York University, New York, NY, USA.
| | - Elaine M Urbina
- Division of Preventive Cardiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Mamdouh Khoder
- Department of Environmental Sciences, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mansour Alghamdi
- Department of Environmental Sciences, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ibrahim Shabaj
- Department of Environmental Sciences, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohammed S Alam
- Division of Environmental Health and Risk Management, School of Geography, Earth and Environmental Sciences. University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Roy M Harrison
- Department of Environmental Sciences, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, Saudi Arabia; Division of Environmental Health and Risk Management, School of Geography, Earth and Environmental Sciences. University of Birmingham, Edgbaston, Birmingham B15 2TT, UK; Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Magdy Shamy
- Department of Environmental Sciences, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, Saudi Arabia
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do Amaral AE, Petkowicz CLO, Mercê ALR, Iacomini M, Martinez GR, Merlin Rocha ME, Cadena SMSC, Noleto GR. Leishmanicidal activity of polysaccharides and their oxovanadium(IV/V) complexes. Eur J Med Chem 2014; 90:732-41. [PMID: 25506811 DOI: 10.1016/j.ejmech.2014.12.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 11/21/2014] [Accepted: 12/03/2014] [Indexed: 02/08/2023]
Abstract
The parasites of the genus Leishmania cause a range of leishmaniasis diseases, whose treatment is impaired due to intramacrophage parasites living in the mammalian host. Immunostimulation has been considered an important strategy to leishmaniasis treatment. The immunomodulatory effects of the polysaccharides arabinogalactan (ARAGAL), galactomannan (GMPOLY), and xyloglucan (XGJ), as well as their oxovanadium (IV/V) complexes (ARAGAL:VO, GMPOLY:VO, and XGJ:VO) were evaluated on peritoneal macrophages. At 25 μg/mL of GMPOLY:VO and of XGJ:VO, and 10 μg/mL of ARAGAL:VO, nitric oxide (NO) production by the macrophages was not altered compared with the control group. All polymers increased the production of interleukins 1 beta and 6 (IL-1β and IL-6), but the oxovanadium complexes were more potent activators of these mediators. ARAGAL:VO 10 μg/mL, GMPOLY:VO and XGJ:VO 25 μg/mL led to an increase of 562%, 1054%, and 523% for IL-1β, respectively. For IL-6 at the same concentration, the levels increased by 539% and 794% for ARAGAL:VO and GMPOLY:VO, respectively. Polysaccharides and their oxovanadium complexes exhibited important leishmanicidal effects on amastigotes of Leishmania (L.) amazonensis. The native and complexed polymers reduced the growth of promastigote-form Leishmania by ∼60%. This effect was reached at concentrations 12 times lower than that observed for Glucantime (300 μg/mL promoted an inhibition of ∼60%). The 50% inhibitory concentration (IC50) values for the complexes were determined. XGJ:VO showed the lowest IC50 value (6.2 μg/mL; 0.07 μg/mL of vanadium), which for ARAGAL:VO was 6.5 μg/mL (0.21 μg/mL of vanadium) and 7.3 μg/mL (0.06 μg/mL of vanadium) for GMPOLY:VO. The upregulation of IL-1β and IL-6 release and downregulation of NO production by macrophages and the important leishmanicidal effect are essential to stablish their potential use against this pathology.
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Affiliation(s)
- Alex Evangelista do Amaral
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
| | | | | | - Marcelo Iacomini
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
| | - Glaucia Regina Martinez
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
| | - Maria Eliane Merlin Rocha
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
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Clark O, Park I, Di Florio A, Cichon AC, Rustin S, Jugov R, Maeshima R, Stoker AW. Oxovanadium-based inhibitors can drive redox-sensitive cytotoxicity in neuroblastoma cells and synergise strongly with buthionine sulfoximine. Cancer Lett 2014; 357:316-327. [PMID: 25444896 DOI: 10.1016/j.canlet.2014.11.039] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 11/17/2014] [Accepted: 11/18/2014] [Indexed: 12/30/2022]
Abstract
In a wide range of neuroblastoma-derived lines oxovanadium compounds such as bis(maltolato)oxovanadium(IV) (BMOV) are cytotoxic. This is not explained by oxidative stress or inhibition of ion channels. Genotoxicity is unlikely given that a p53 response is absent and p53-mutant lines are also sensitive. Cytotoxicity is inhibited by N-acetyl cysteine and glutathione ester, indicating that BMOV action is sensitive to cytoplasmic redox and thiol status. Significantly, combining BMOV with glutathione synthesis inhibition greatly enhances BMOV-induced cell death. This combination treatment triggers high AKT pathway activation, highlighting the potential functional importance of PTP inhibition by BMOV. AKT activation itself, however, is not required for cytotoxicity. Oxovanadium compounds may thus represent novel leads as p53-independent therapeutics for neuroblastoma.
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Affiliation(s)
- Owen Clark
- Cancer Section, Developmental Biology & Cancer Programme, UCL Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
| | - Inhye Park
- Cancer Section, Developmental Biology & Cancer Programme, UCL Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
| | - Alessia Di Florio
- Cancer Section, Developmental Biology & Cancer Programme, UCL Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
| | - Ann-Christin Cichon
- Cancer Section, Developmental Biology & Cancer Programme, UCL Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
| | - Sarah Rustin
- Cancer Section, Developmental Biology & Cancer Programme, UCL Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
| | - Roman Jugov
- Cancer Section, Developmental Biology & Cancer Programme, UCL Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
| | - Ruhina Maeshima
- Cancer Section, Developmental Biology & Cancer Programme, UCL Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
| | - Andrew W Stoker
- Cancer Section, Developmental Biology & Cancer Programme, UCL Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK.
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Polyoxometalates as antitumor agents: Bioactivity of a new polyoxometalate with copper on a human osteosarcoma model. Chem Biol Interact 2014; 222:87-96. [DOI: 10.1016/j.cbi.2014.10.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2014] [Revised: 10/08/2014] [Accepted: 10/10/2014] [Indexed: 11/19/2022]
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Fortoul T, Rodriguez-Lara V, González-Villalva A, Rojas-Lemus M, Cano-Gutiérrez G, Ustarroz-Cano M, Colín-Barenque L, Bizarro-Nevares P, García-Pealez I, Montaño L, Jimenez-Martinez R, Lopez-Valdez N, Ruiz-Guerrero M, Meléndez-García N, García-Ibarra F, Martínez-Baez V, Alfaro DZ, Muñiz-Rivera-Cambas A, López-Zepeda L, Quezada-Maldonado E, Cervantes-Yépez S. Inhalation of vanadium pentoxide and its toxic effects in a mouse model. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.03.027] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Abstract
SIGNIFICANCE Protein tyrosine phosphatases (PTPs) play essential roles in controlling cell proliferation, differentiation, communication, and adhesion. The dysregulated activities of PTPs are involved in the pathogenesis of a number of human diseases such as cancer, diabetes, and autoimmune diseases. RECENT ADVANCES Many PTPs have emerged as potential new targets for novel drug discovery. PTP inhibitors have attracted much attention. Many PTP inhibitors have been developed. Some of them have been proven to be efficient in lowering blood glucose levels in vivo or inhibiting tumor xenograft growth. CRITICAL ISSUES Some metal ions and metal complexes potently inhibit PTPs. The metal atoms within metal complexes play an important role in PTP binding, while ligand structures influence the inhibitory potency and selectivity. Some metal complexes can penetrate the cell membrane and selectively bind to their targeting PTPs, enhancing the phosphorylation of the related substrates and influencing cellular metabolism. PTP inhibition is potentially involved in the pathophysiological and toxicological processes of metals and some PTPs may be cellular targets of certain metal-based therapeutic agents. FUTURE DIRECTIONS Investigating the structural basis of the interactions between metal complexes and PTPs would facilitate a comprehensive understanding of the structure-activity relationship and accelerate the development of promising metal-based drugs targeting specific PTPs.
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Affiliation(s)
- Liping Lu
- Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry, Institute of Molecular Science, Shanxi University , Taiyuan, People's Republic of China
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25
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Gonzalez-Villalva A, Piñon-Zarate G, Falcon-Rodriguez C, Lopez-Valdez N, Bizarro-Nevares P, Rojas-Lemus M, Rendon-Huerta E, Colin-Barenque L, Fortoul TI. Activation of Janus kinase/signal transducers and activators of transcription pathway involved in megakaryocyte proliferation induced by vanadium resembles some aspects of essential thrombocythemia. Toxicol Ind Health 2014; 32:908-18. [PMID: 24442345 DOI: 10.1177/0748233713518600] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Vanadium (V) is an air pollutant released into the atmosphere by burning fossil fuels. Also, it has been recently evaluated for their carcinogenic potential to establish permissible limits of exposure at workplaces. We previously reported an increase in the number and size of platelets and their precursor cells and megakaryocytes in bone marrow and spleen. The aim of this study was to identify the involvement of Janus kinase/signal transducers and activators of transcription (JAK/STAT) pathway and thrombopoietin (TPO) receptor, and myeloproliferative leukemia virus oncogene (Mpl), in megakaryocyte proliferation induced by this compound. Mice were exposed twice a week to vanadium pentoxide inhalation (0.02 M) and were killed at 4th, 6th, and 8th week of exposure. Phosphorylated JAK2 (JAK2 ph), STAT3 (STAT3 ph), STAT5, and Mpl were identified in mice spleen megakaryocytes by cytofluorometry and immunohistochemistry. An increase in JAK2 ph and STAT3 ph, but a decrease in Mpl at 8-week exposure was identified in our findings. Taking together, we propose that the morphological findings, JAK/STAT activation, and decreased Mpl receptor induced by V leads to a condition comparable to essential thrombocythemia, so the effect on megakaryocytes caused by different mechanisms is similar. We also suggest that the decrease in Mpl is a negative feedback mechanism after the JAK/STAT activation. Since megakaryocytes are platelet precursors, their alteration affects platelet morphology and function, which might have implications in hemostasis as demonstrated previously, so it is important to continue evaluating the effects of toxics and pollutants on megakaryocytes and platelets.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Teresa I Fortoul
- Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico
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Srivastava S, Kumar N, Roy P. Role of ERK/NFκB in vanadium (IV) oxide mediated osteoblast differentiation in C3H10t1/2 cells. Biochimie 2014; 101:132-44. [PMID: 24440756 DOI: 10.1016/j.biochi.2014.01.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 01/06/2014] [Indexed: 10/25/2022]
Abstract
Vanadium (V) compounds are reported to have insulin mimicking action, which render them to show excellent osteogenic activity. In the current study we investigated the effect of various vanadium compounds on osteoblast differentiation of mouse mesenchymal stem cells, C3H10t1/2 cells, and analyzed the underlying mechanism of vanadium for this action. Our data showed that treatment of C3H10t1/2 cells with V (IV) oxide complex (at 7-25 μM concentrations) induced osteoblast differentiation maximally as compared to V2O5. On the other hand, ammonium vanadate was found to dampen the osteoblast differentiation process. Based on this data, V (IV) oxide was investigated further to analyze its probable mode of action as an osteoblastic agent. The key factors implicated in osteoblast differentiation i.e., NFκB, ERK ½, AP1 and CRE were examined in response to V (IV) oxide exposure. Exposure to V (IV) oxide caused 2- and 5-folds induction of luciferase activities in cells transfected with SRE-luc and NFκB-luc reporter vectors respectively (p < 0.05). Further, exposure to V (IV) oxide enhanced the phosphorylation of ERK ½, IκB and NFκBp65 proteins. In addition, RT-PCR analysis, alizarin red staining and immunoblot analysis showed that inhibition of osteoblast differentiation in presence of PD98059 and parthenolide (inhibitors of ERK and NFκB pathways respectively) was rescued in presence of V (IV) oxide. These results suggest that V (IV) oxide up regulates osteoblast differentiation through ERK and NFκB pathways and hence could be utilized as an agent for bone formation after further analysis and validation.
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Affiliation(s)
- Swati Srivastava
- Molecular Endocrinology Laboratory, Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee 247 667, Uttarakhand, India
| | - Narender Kumar
- Molecular Endocrinology Laboratory, Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee 247 667, Uttarakhand, India
| | - Partha Roy
- Molecular Endocrinology Laboratory, Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee 247 667, Uttarakhand, India.
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Biological evaluation of morin and its new oxovanadium(IV) complex as antio-xidant and specific anti-cancer agents. Chem Biol Interact 2013; 206:289-301. [DOI: 10.1016/j.cbi.2013.10.006] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 09/14/2013] [Accepted: 10/05/2013] [Indexed: 11/22/2022]
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Lin CY, Trinh NN, Lin CW, Huang HJ. Transcriptome analysis of phytohormone, transporters and signaling pathways in response to vanadium stress in rice roots. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2013; 66:98-104. [PMID: 23500712 DOI: 10.1016/j.plaphy.2013.02.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Accepted: 02/05/2013] [Indexed: 06/01/2023]
Abstract
Trace concentrations of vanadium (V) have several benefits for plant growth, but high concentrations are toxic. To help characterize the cellular mechanisms underlying the toxic effects of V in plants, we present the first large-scale analysis of rice root responding to V during the early stages (1 and 3 h) of toxicity. Exposure to V triggered changes in the transcript levels of several genes related to cellular metabolic process, response to stimulus and transporters. Gene expression profiling revealed upregulated levels of genes associated with signaling and biosynthesis of auxin, abscisic acid (ABA) and jasmonic acid (JA) in V-treated rice roots. In addition, V upregulated the expression of ATP-dependent GSH-conjugated transport, ATP binding cassette (ABC) transporter, and markedly downregulated of the expression of divalent cation transporters, drug/metabolite transporter (DMT) and zinc-iron permease (ZIP). Among the V-specific responsive transcription factors and protein kinases, the most predominant families were NAC (NAM, ATAF, CUC) transcription factor, receptor-like cytoplasmic kinase VII (RLCK-VII) and leucine-rich repeat kinase VIII (LRR-VIII). These microarray data provide a new insight into the molecular mechanism of the rice roots response to V toxicity.
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Affiliation(s)
- Chung-Yi Lin
- Department of Life Sciences, National Cheng Kung University, Tainan, Taiwan
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Di Virgilio A, Maisuls I, Kleitz F, Arnal P. A new synthesis pathway for colloidal silica spheres coated with crystalline titanium oxide and its comparative cyto- and genotoxic study with titanium oxide nanoparticles in rat osteosarcoma (UMR106) cells. J Colloid Interface Sci 2013; 394:147-56. [DOI: 10.1016/j.jcis.2012.11.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 11/02/2012] [Accepted: 11/05/2012] [Indexed: 11/24/2022]
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Clark O, Daga S, Stoker AW. Tyrosine phosphatase inhibitors combined with retinoic acid can enhance differentiation of neuroblastoma cells and trigger ERK- and AKT-dependent, p53-independent senescence. Cancer Lett 2012; 328:44-54. [PMID: 23022267 DOI: 10.1016/j.canlet.2012.09.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Revised: 08/29/2012] [Accepted: 09/19/2012] [Indexed: 10/27/2022]
Abstract
Retinoic acid (RA)-induced differentiation therapy is partially successful in neuroblastoma treatment. We found that a novel combination of vanadium-based PTP inhibitors with RA induced extensive differentiation in neuroblastoma cells. In contrast to RA alone, this led to either permanent differentiation or senescence after 14days of combined treatment followed by chemical removal. Senescence was dependent in part on synergistic AKT and ERK activation. p21 was also strongly induced, but in contrast to oncogene-induced senescence, p53 was not activated. Vanadium-based inhibitors thus serve strongly to enhance RA's ability to drive differentiation and a novel form of senescence in neuroblastoma cells.
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Affiliation(s)
- Owen Clark
- Neural Development Unit, Institute of Child Health, University College London, 30 Guilford Street, London WC1N 1EH, United Kingdom
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León IE, Di Virgilio AL, Barrio DA, Arrambide G, Gambino D, Etcheverry SB. Hydroxylamido–amino acid complexes of oxovanadium(v). Toxicological study in cell culture and in a zebrafish model. Metallomics 2012; 4:1287-96. [DOI: 10.1039/c2mt20091k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Lin CP, Lin YL, Huang PH, Tsai HS, Chen YH. Inhibition of endothelial adhesion molecule expression by Monascus purpureus-fermented rice metabolites, monacolin K, ankaflavin, and monascin. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2011; 91:1751-1758. [PMID: 21445895 DOI: 10.1002/jsfa.4371] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Revised: 12/01/2010] [Accepted: 02/07/2011] [Indexed: 05/30/2023]
Abstract
BACKGROUND Inflammation is an independent risk factor of cardiovascular diseases and is associated with endothelial dysfunction. Monascus purpureus-fermented rice, containing naturally occurring statins and various pigments, has lipid-modulating, anti-inflammatory and antioxidative effects. RESULTS The effects of monacolin K, ankaflavin and monascin, as metabolites from Monascus-fermented rice, on the expression of cell adhesion molecules (intercellular adhesion molecule-1 (ICAM-1), vascular cell adhesion molecular-1 (VCAM-1) and E-selectin) by tumor necrosis factor (TNF)-α-treated human aortic endothelial cells (HAECs) were investigated. Supplement of HAECs with these Monascus-fermented rice metabolites significantly suppressed cellular binding between the human monocytic cells U937 and TNF-α-stimulated HAECs. Immunoblot analysis showed that Monascus-fermented rice metabolites significantly attenuated TNF-α-induced VCAM-1 and E-selectin but not ICAM-1 protein expression. Gel shift assays showed that Monascus-fermented rice metabolites treatment reduced TNF-α-activated transcription factor nuclear factor (NF)-κB. Furthermore, Monascus-fermented rice metabolites also attenuated reactive oxygen species (ROS) generation in vitro and in TNF-α-treated HAECs. Supplement with an ROS scavenger N-acetylcysteine gave similar results as compared with Monascus-fermented rice metabolites. CONCLUSION Monascus-fermented rice metabolites reduced TNF-α-stimulated endothelial adhesiveness as well as downregulating intracellular ROS formation, NF-κB activation, and VCAM-1/E-selectin expression in HAECs, supporting the notion that the various metabolites from Monascus-fermented rice might have potential implications in clinical atherosclerosis disease.
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Affiliation(s)
- Chih-Pei Lin
- Department of Pathology and Laboratory Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.
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Antioxidant, DNA cleavage, and cellular effects of silibinin and a new oxovanadium(IV)/silibinin complex. J Biol Inorg Chem 2011; 16:653-68. [DOI: 10.1007/s00775-011-0769-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Accepted: 02/27/2011] [Indexed: 10/18/2022]
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Zhou G, Doçi CL, Lingen MW. Identification and functional analysis of NOL7 nuclear and nucleolar localization signals. BMC Cell Biol 2010; 11:74. [PMID: 20875127 PMCID: PMC2957388 DOI: 10.1186/1471-2121-11-74] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2010] [Accepted: 09/27/2010] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND NOL7 is a candidate tumor suppressor that localizes to a chromosomal region 6p23. This locus is frequently lost in a number of malignancies, and consistent loss of NOL7 through loss of heterozygosity and decreased mRNA and protein expression has been observed in tumors and cell lines. Reintroduction of NOL7 into cells resulted in significant suppression of in vivo tumor growth and modulation of the angiogenic phenotype. Further, NOL7 was observed to localize to the nucleus and nucleolus of cells. However, the mechanisms regulating its subcellular localization have not been elucidated. RESULTS An in vitro import assay demonstrated that NOL7 requires cytosolic machinery for active nuclear transport. Using sequence homology and prediction algorithms, four putative nuclear localization signals (NLSs) were identified. NOL7 deletion constructs and cytoplasmic pyruvate kinase (PK) fusion proteins confirmed the functionality of three of these NLSs. Site-directed mutagenesis of PK fusions and full-length NOL7 defined the minimal functional regions within each NLS. Further characterization revealed that NLS2 and NLS3 were critical for both the rate and efficiency of nuclear targeting. In addition, four basic clusters within NLS2 and NLS3 were independently capable of nucleolar targeting. The nucleolar occupancy of NOL7 revealed a complex balance of rapid nucleoplasmic shuttling but low nucleolar mobility, suggesting NOL7 may play functional roles in both compartments. In support, targeting to the nucleolar compartment was dependent on the presence of RNA, as depletion of total RNA or rRNA resulted in a nucleoplasmic shift of NOL7. CONCLUSIONS These results identify the minimal sequences required for the active targeting of NOL7 to the nucleus and nucleolus. Further, this work characterizes the relative contribution of each sequence to NOL7 nuclear and nucleolar dynamics, the subnuclear constituents that participate in this targeting, and suggests a functional role for NOL7 in both compartments. Taken together, these results identify the requisite protein domains for NOL7 localization, the kinetics that drive this targeting, and suggest NOL7 may function in both the nucleus and nucleolus.
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Affiliation(s)
- Guolin Zhou
- Department of Pathology, The University of Chicago, Chicago, IL, USA
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Naso L, Ferrer EG, Lezama L, Rojo T, Etcheverry SB, Williams P. Role of oxidative stress in the antitumoral action of a new vanadyl(IV) complex with the flavonoid chrysin in two osteoblast cell lines: relationship with the radical scavenger activity. J Biol Inorg Chem 2010; 15:889-902. [PMID: 20364393 DOI: 10.1007/s00775-010-0652-z] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2009] [Accepted: 03/07/2010] [Indexed: 10/19/2022]
Abstract
The new complex [VO(chrysin)(2)EtOH](2) (VOchrys) has been synthesized and thoroughly characterized. Fourier transform IR, UV-vis, diffuse reflectance, and EPR spectroscopies as well as elemental analysis and thermal measurements were performed. In solution, different species could be detected by EPR spectroscopy as a function of the ligand-to-metal ratio. The stoichiometry of the chelate complex formed at pH 5 was also determined by spectrophotometric titrations. Since flavonoids are natural antioxidant compounds, the antioxidant capacity of chrysin and its vanadyl(IV) complex was investigated using different radicals. Chrysin and its complex were not able to diminish the level of superoxide and 1,1-diphenyl-2-picrylhydrazyl radicals to a great extent. In contrast, they were strong scavengers for 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid diammonium salt radical cations and OH. radicals with a greater potency for VOchrys. Taking into account their selective antioxidant properties, we investigated the bioactivity of these compounds in two osteoblast-like cells in culture. Chrysin and VOchrys caused an inhibition of cell proliferation in MC3T3E1 normal osteoblasts and UMR106 tumor cells in a dose-response manner, with a greater effect in the latter cell line. The generation of reactive oxygen species (ROS) was evaluated in both cell lines and a correlation could be established between the antiproliferative effects of chrysin and the increase in the ROS levels. The complex did not generate types of ROS that can be detected by the dihydrorhodamine 123 technique so the antiproliferative effect may be attributed to the formation of other radicals such as superoxide, which is not detected by this probe. The morphological alterations were in agreement with these changes.
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Affiliation(s)
- Luciana Naso
- Facultad de Ciencias Exactas, Centro de Química Inorgánica (CEQUINOR/CONICET, UNLP), Universidad Nacional de La Plata, C. Correo 962, 1900, La Plata, Argentina
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Refat MS, El-Shazly SA. Identification of a new anti-diabetic agent by combining VOSO4 and vitamin E in a single molecule: studies on its spectral, thermal and pharmacological properties. Eur J Med Chem 2010; 45:3070-9. [PMID: 20413189 DOI: 10.1016/j.ejmech.2010.03.040] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2010] [Revised: 03/26/2010] [Accepted: 03/29/2010] [Indexed: 11/19/2022]
Abstract
Vanadium(IV) complex of vitamin E (Vit E) ligand was reported. In this complex, binuclear ligand acts as a monodentate via oxygen of phenolic group. The vanadyl(II) ion is surrounded by two molecules of Vit E and two water molecules. The [VO(Vit E)(2)(H(2)O)(2)]2H(2)O complex was isolated by the reaction between VOSO(4) and vitamin E in ethanol/water solvent (50/50 w/w) at pH=8. The solid vanadyl(II) complex has been characterized by elemental analyses (CHN), photometric titrations, infrared spectra, molar conductivity, electronic spectra, TGA/DSC, SEM and XRD studies. Electronic and magnetic measurements are confirmed that the speculated geometry of vanadyl(II) complex is square pyramidal geometry. The microbial test was performed for the vanadyl complex against some kinds of bacteria and fungi. The [VO(Vit E)(2)(H(2)O)(2)]2H(2)O complex was proved effective in addressing diabetic of type I in case of experimental animal than other compounds were prepared in the literature.
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Affiliation(s)
- Moamen S Refat
- Department of Chemistry, Faculty of Science, Port Said 42111, Suez Canal University, Egypt.
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A S, JC M, Y G, F C, JP S, A EF. Green Tea Drinking Reduces the Effects of Vanadium Poisoning in Rat Kidney. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2009. [DOI: 10.3136/fstr.15.413] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Rodrigues MS, Reddy MM, Sattler M. Cell cycle regulation by oncogenic tyrosine kinases in myeloid neoplasias: from molecular redox mechanisms to health implications. Antioxid Redox Signal 2008; 10:1813-48. [PMID: 18593226 DOI: 10.1089/ars.2008.2071] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Neoplastic expansion of myeloid cells is associated with specific genetic changes that lead to chronic activation of signaling pathways, as well as altered metabolism. It has become increasingly evident that transformation relies on the interdependency of both events. Among the various genetic changes, the oncogenic BCR-ABL tyrosine kinase in patients with Philadelphia chromosome positive chronic myeloid leukemia (CML) has been a focus of extensive research. Transformation by this oncogene is associated with elevated levels of intracellular reactive oxygen species (ROS). ROS have been implicated in processes that promote viability, cell growth, and regulation of other biological functions such as migration of cells or gene expression. Currently, the BCR-ABL inhibitor imatinib mesylate (Gleevec) is being used as a first-line therapy for the treatment of CML. However, BCR-ABL transformation is associated with genomic instability, and disease progression or resistance to imatinib can occur. Imatinib resistance is not known to cause or significantly alter signaling requirements in transformed cells. Elevated ROS are crucial for transformation, making them an ideal additional target for therapeutic intervention. The underlying mechanisms leading to elevated oxidative stress are reviewed, and signaling mechanisms that may serve as novel targeted approaches to overcome ROS-dependent cell growth are discussed.
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Affiliation(s)
- Margret S Rodrigues
- Department of Medical Oncology, Dana-Farber Cancer Institute, Brigham and Women's Hospital, and Harvard Medical School, Boston, Massachusetts 02115, USA
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Forman HJ, Fukuto JM, Miller T, Zhang H, Rinna A, Levy S. The chemistry of cell signaling by reactive oxygen and nitrogen species and 4-hydroxynonenal. Arch Biochem Biophys 2008; 477:183-95. [PMID: 18602883 PMCID: PMC2590784 DOI: 10.1016/j.abb.2008.06.011] [Citation(s) in RCA: 163] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2008] [Revised: 06/11/2008] [Accepted: 06/14/2008] [Indexed: 02/07/2023]
Abstract
During the past several years, major advances have been made in understanding how reactive oxygen species (ROS) and nitrogen species (RNS) participate in signal transduction. Identification of the specific targets and the chemical reactions involved still remains to be resolved with many of the signaling pathways in which the involvement of reactive species has been determined. Our understanding is that ROS and RNS have second messenger roles. While cysteine residues in the thiolate (ionized) form found in several classes of signaling proteins can be specific targets for reaction with H(2)O(2) and RNS, better understanding of the chemistry, particularly kinetics, suggests that for many signaling events in which ROS and RNS participate, enzymatic catalysis is more likely to be involved than non-enzymatic reaction. Due to increased interest in how oxidation products, particularly lipid peroxidation products, also are involved with signaling, a review of signaling by 4-hydroxy-2-nonenal (HNE) is included. This article focuses on the chemistry of signaling by ROS, RNS, and HNE and will describe reactions with selected target proteins as representatives of the mechanisms rather attempt to comprehensively review the many signaling pathways in which the reactive species are involved.
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Affiliation(s)
- Henry Jay Forman
- School of Natural Sciences, University of California, Merced, 4225 N. Hospital Road, Building 1200, Merced, CA 95344, USA.
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Small-molecule protein tyrosine phosphatase inhibition as a neuroprotective treatment after spinal cord injury in adult rats. J Neurosci 2008; 28:7293-303. [PMID: 18632933 DOI: 10.1523/jneurosci.1826-08.2008] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Spinal cord injury causes progressive secondary tissue degeneration, leaving many injured people with neurological disabilities. There are no satisfactory neuroprotective treatments. Protein tyrosine phosphatases inactivate neurotrophic factor receptors and downstream intracellular signaling molecules. Thus, we tested whether the peroxovanadium compound potassium bisperoxo(1,10-phenanthroline)oxovanadate (V) [bpV(phen)], a stable, potent and selective protein tyrosine phosphatase inhibitor, would be neuroprotective after a thoracic spinal cord contusion in adult rats. Intrathecal bpV(phen) infusions through a lumbar puncture rescued dorsal column sensory axons innervating the nucleus gracilis and white matter at the injury epicenter. At the most effective dose, essentially all of these axons and most of the white matter at the epicenter were spared (vs approximately 60% with control infusions). bpV(phen) treatments started 4 h after contusion were fully effective. This treatment greatly improved and normalized sensorimotor function in a grid-walking test and provided complete axonal protection over 6 weeks. The treatment rescued sensory-evoked potentials that disappeared after dorsal column transection. bpV(phen) affected early degenerative mechanisms, because the main effects were seen at 7 d and lasted beyond the treatment period. The neuroprotection appeared to be mediated by rescue of blood vessels. bpV(phen) reduced apoptosis of cultured endothelial cells. These results show that a small molecule, used in a clinically relevant manner, reduces loss of long-projecting axons, myelin, blood vessels, and function in a model relevant to the most common type of spinal cord injury in humans. They reveal a novel mechanism of spinal cord degeneration involving protein tyrosine phosphatases that can be targeted with therapeutic drugs.
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Zhang Z, Humphreys BD, Bonventre JV. Shedding of the urinary biomarker kidney injury molecule-1 (KIM-1) is regulated by MAP kinases and juxtamembrane region. J Am Soc Nephrol 2008; 18:2704-14. [PMID: 17898236 DOI: 10.1681/asn.2007030325] [Citation(s) in RCA: 100] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Kidney injury molecule-1 (KIM-1) is markedly upregulated in renal proximal tubule cells by stimuli that promote dedifferentiation, including ischemic or toxic injury, as well as in cases of tubulointerstitial disease, polycystic kidney disease, and renal cell carcinoma. Structurally, KIM-1 possesses a single transmembrane domain and undergoes membrane-proximal cleavage, which leads to the release of soluble KIM-1 ectodomain into the urine. Urinary KIM-1 ectodomain is a promising sensitive and specific biomarker for acute kidney injury in humans, and therefore it is important to determine what regulates KIM-1 shedding. We found that constitutive cleavage of KIM-1 is mediated by ERK activation, and that cleavage is accelerated by p38 MAP kinase activation. After cleavage, a 14-kD membrane-bound fragment of KIM-1, which contains two highly conserved tyrosine residues, was tyrosine-phosphorylated. Mutagenesis studies demonstrated that the juxtamembrane secondary structure, not the primary amino acid sequence, was critical to the cleavage of KIM-1.
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Affiliation(s)
- Zhiwei Zhang
- Renal Division, Brigham and Women's Hospital, Department of Medicine, Harvard Medical School, and Harvard-Massachusetts Institute of Technology Division of Health Sciences and Technology, Boston, Massachusetts, USA
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Samanta S, Swamy V, Suresh D, Rajkumar M, Rana B, Rana A, Chatterjee M. Protective effects of vanadium against DMH-induced genotoxicity and carcinogenesis in rat colon: Removal of O6-methylguanine DNA adducts, p53 expression, inducible nitric oxide synthase downregulation and apoptotic induction. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2008; 650:123-31. [DOI: 10.1016/j.mrgentox.2007.11.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2007] [Revised: 10/12/2007] [Accepted: 11/04/2007] [Indexed: 12/18/2022]
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González Baró A, Andersson I, Pettersson L, Gorzsás A. Speciation in the aqueous peroxovanadate–maltol and (peroxo)vanadate–uridine systems. Dalton Trans 2008:1095-102. [DOI: 10.1039/b717119f] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Capella MAM, Capella LS, Valente RC, Gefé M, Lopes AG. Vanadate-induced cell death is dissociated from H2O2 generation. Cell Biol Toxicol 2007; 23:413-20. [PMID: 17457679 DOI: 10.1007/s10565-007-9003-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2006] [Accepted: 02/07/2007] [Indexed: 10/25/2022]
Abstract
Vanadium is an environmentally toxic metal with peculiar and sometimes contradictory cellular effects. It is insulin-mimetic, it can either stimulate cell growth or induce cell death, and it has both mutagenic and antineoplastic properties. However, the mechanisms involved in those effects are poorly understood. Several studies suggest that H(2)O(2) is involved in vanadate-induced cell death, but it is not known whether cellular sensitivity to vanadate is indeed related to H(2)O(2) generation. In the present study, the sensitivity of four cell lines from different origins (K562, K562-Lucena 1, MDCK, and Ma104) to vanadate and H(2)O(2) was evaluated and the production of H(2)O(2) by vanadate was analyzed by flow cytometry. We show that cell lines very resistant to H(2)O(2) (K562, K562-Lucena 1, and Ma104 cells) are much more sensitive to vanadate than MDCK, a cell line relatively susceptible to H(2)O(2), suggesting that vanadate-induced cytotoxicity is not directly related to H(2)O(2) responsiveness. In accordance, vanadate concentrations that reduced cellular viability to approximately 60-70% of the control (10 mumol/L) did not induce H(2)O(2) formation. A second hypothesis, that peroxovanadium (PV) compounds, produced once vanadate enters into the cells, are responsible for the cytotoxicity, was only partially confirmed because MDCK cells were resistant to both vanadate and PV compounds (10 micromol/L each). Therefore, our results suggest that vanadate toxicity occurs by two distinct pathways, one dependent on and one independent of H(2)O(2) production.
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Affiliation(s)
- M A M Capella
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, RJ, Brazil.
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Uckun F, Ozer Z, Vassilev A. Bruton's tyrosine kinase prevents activation of the anti-apoptotic transcription factor STAT3 and promotes apoptosis in neoplastic B-cells and B-cell precursors exposed to oxidative stress. Br J Haematol 2007; 136:574-89. [PMID: 17367410 DOI: 10.1111/j.1365-2141.2006.06468.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Bruton's tyrosine kinase (BTK) was previously demonstrated to be a mediator of oxidative stress-induced apoptosis in irradiated neoplastic B-cells and B-cell precursors. Defective BTK expression in leukaemic B-cell precursors from infants with t(4;11) acute lymphoblastic leukaemia has been associated with radiation resistance. The present study examined whether BTK mediates apoptosis during oxidative stress by interfering with the anti-apoptotic function of signal transducer and activator of transcription 3 (STAT3). BTK physically associated with and tyrosine phosphorylated STAT3; this association was promoted by pervanadate (PV)-induced oxidative stress. The BTK/STAT3 interaction appeared to prevent STAT3 response to oxidative stress, because PV-induced STAT3 activation was markedly enhanced in DT40 chicken lymphoma B-cells that were rendered BTK-deficient by targeted disruption of the btk gene as well as in BTK-deficient RAMOS-1 human lymphoma B-cells. These BTK-deficient cells were highly resistant to oxidative stress-induced apoptosis triggered by PV treatment. Reconstitution of BTK-deficient DT40 cells with wild-type human BTK gene eliminated the amplification of the STAT3 response and restored the PV-induced apoptotic signal. Similarly, while the BTK-positive NALM-6 human leukaemic B-cell precursor cell line showed no STAT3 activation after PV treatment and was exquisitely sensitive to PV-induced apoptosis, PV failed to induce apoptosis in BTK-deficient RAMOS-1 human lymphoma B-cells that showed a robust STAT3 response. These results provide unprecedented biochemical and genetic evidence for a unique mode of cross-talk that occurs between BTK and STAT3 pathways during oxidative stress, whereby BTK may trigger apoptosis via negative regulation of the anti-apoptotic STAT3 activity.
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Affiliation(s)
- Fatih Uckun
- Parker Hughes Cancer Center, Roseville, MN 55113, USA.
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Forman HJ. Use and abuse of exogenous H2O2 in studies of signal transduction. Free Radic Biol Med 2007; 42:926-32. [PMID: 17349920 PMCID: PMC1945171 DOI: 10.1016/j.freeradbiomed.2007.01.011] [Citation(s) in RCA: 126] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2006] [Revised: 12/29/2006] [Accepted: 01/05/2007] [Indexed: 11/20/2022]
Abstract
The goal of this review is to present a rationale for the use of exogenous H(2)O(2), which has been demonstrated to have both toxicological and physiological signaling roles. Reasons for the use of exogenous application of nontoxic concentrations of H(2)O(2) in model systems and caveats for interpretation of the data obtained will both be presented. Briefly, an argument for the cautious use of the addition of exogenous H(2)O(2) is that, because of the permeability of cell membranes to this neutral small molecule, a concentration that is produced locally and that is necessary for the physiological action can be mimicked. On the other hand, it must be recognized that the addition of an agent or its enzymatic generation in the medium may produce reactions that may not normally occur because the total dose of H(2)O(2) and the concentration of H(2)O(2) in some cellular locations will exceed what is normally achieved even under a pathophysiological state. For this reason, this review will try to provide an unbiased balanced pros- and -cons analysis of this issue.
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Affiliation(s)
- Henry Jay Forman
- School of Natural Sciences, University of California at Merced, Merced, CA 95344, USA.
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Soussi A, Gaubin Y, Beau B, Murat JC, Soleilhavoup JP, Croute F, El Feki A. Stress proteins (Hsp72/73, Grp94) expression pattern in rat organs following metavanadate administration. Effect of green tea drinking. Food Chem Toxicol 2006; 44:1031-7. [PMID: 16497423 DOI: 10.1016/j.fct.2005.12.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2005] [Revised: 12/21/2005] [Accepted: 12/22/2005] [Indexed: 11/27/2022]
Abstract
Expression pattern of heat shock proteins (Hsp) 72/73 and glucose regulated protein (Grp) 94 was studied in liver, kidney and testis of rats injected with sublethal doses of ammonium metavanadate (5 mg/kg/day). In addition, some batches of animals were given green tea decoction, known to be rich in anti-oxidative compounds, as sole beverage in order to evaluate its protective properties. In control animals, the stress proteins expression was found to be organ-dependent: anti-Grp94 antibody revealed two bands at 96 and 98 kDa in kidney and liver whereas the 98 kDa band only was found in testis; anti-Hsp72/73 antibody revealed that the constitutive Hsp73 was present in all organs whereas the inducible Hsp72 was only present in kidney and testis. In kidney of vanadium-treated rats, Hsp73 was over-expressed by about 50% whereas Hsp72 was down-regulated by 50-80%. No such effects were observed in liver and testis. In liver and kidney of vanadium-treated rats, Grp94 was over-expressed by 50% and 150% respectively whereas no change was found in testis. In rats given green tea as sole beverage, the 96 kDa protein expression level in liver was reduced both in controls and in vanadium-treated animals. However, green tea drinking failed to prevent the vanadium-induced Hsp72 under-expression in kidney of vanadium-treated rats.
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Affiliation(s)
- A Soussi
- Laboratoire d'Ecophysiologie Animale, Faculté des Sciences de Sfax, 3018 Sfax, Tunisia
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Barrio DA, Etcheverry SB. Vanadium and bone development: putative signaling pathwaysThis paper is one of a selection of papers published in this Special issue, entitled Second Messengers and Phosphoproteins—12th International Conference. Can J Physiol Pharmacol 2006; 84:677-86. [PMID: 16998531 DOI: 10.1139/y06-022] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Vanadium is a trace element present in practically all cells in plants and animals. It exerts interesting actions in living systems. At pharmacological doses, vanadium compounds display relevant biological actions such as mimicking insulin and growth factors as well as having osteogenic activity. Some vanadium compounds also show antitumoral properties. The importance of vanadium in bone arises from the studies developed to establish the essentiality of this element in animals and humans. Bone tissue, where the element seems to play an important role, accumulates great amounts of vanadium. This paper reviews the physiology of osteoblasts, the involvement of different growth factors on bone development, and the effects of vanadium derivatives on the skeletal system of animal models and bone-related cells. Two cellular lines are discussed in particular; one derived from a rat osteosarcoma (UMR106) and the other is a nontransformed osteoblast cell line (MC3T3-E1). The effects of different growth factors and their mechanisms of action in these cellular lines are reviewed. These models of osteoblasts are especially useful in understanding the intracellular signaling pathways of vanadium derivatives in hard tissues. Vanadium uses an intricate interplay of intracellular mechanisms to exert different biochemical and pharmacological actions. The effects of vanadium derivatives on some cellular signaling pathways related to insulin are compiled in this review. The comprehension of these intracellular signaling pathways may facilitate the design of vanadium compounds with promising therapeutic applications as well as the understanding of secondary side effects derived from the use of vanadium as a therapeutic agent.
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Affiliation(s)
- D A Barrio
- Cátedra de Bioquímica Patológica, Facultad de Ciencias Exactas, UNLP, 47 y 115 (1900) La Plata, Argentina
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Shukla R, Barve V, Padhye S, Bhonde R. Reduction of oxidative stress induced vanadium toxicity by complexing with a flavonoid, quercetin: A pragmatic therapeutic approach for diabetes. Biometals 2006; 19:685-93. [PMID: 16703281 DOI: 10.1007/s10534-006-9005-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2006] [Accepted: 03/10/2006] [Indexed: 10/24/2022]
Abstract
Vanadium compounds are known to lower blood glucose level in diabetes but are associated with toxicity. In vitro cytotoxicity of VOSO(4) and bis(quercetinato) oxovanadium(IV) (BQOV) was examined in CHO cells. Both the agents showed time and dose dependent increase in ROS generation however it was relatively less in BQOV. Moreover, VOSO(4) also caused higher necrosis. Hypoglycemic potential of VOSO(4) and BQOV was tested in streptozotocin-induced diabetic Balb/c mice. A marked difference was observed in the hypoglycemic action of VOSO(4) and BQOV treated mice that lasted only for about 6 h in VOSO(4) as against 24 h in BQOV. Comparison of acute toxicity of the compounds in normal Balb/c mice revealed negligible nephrotoxicity of BQOV. Kidney analyses of VOSO(4) treated animals' revealed high ROS generation and tubular necrosis. Similarly serum levels of urea and creatinine were elevated in these animals indicating kidney dysfunction. No such abnormality was observed in BQOV treated animals. Reduced nephrotoxicity of BQOV could be due to increased catalase activity found in the kidney of BQOV treated animals and BQOV's radical scavenging activity. The data clearly demonstrates immense hypoglycemic activity and reduced toxicity of BQOV thus making the conjugate a suitable candidate for therapeutic utility.
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Affiliation(s)
- Ruchi Shukla
- Tissue Engineering and Banking Laboratory, National Centre for Cell Science, Pune University Campus, Ganeshkhind, Pune 411007, India
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Chien PS, Mak OT, Huang HJ. Induction of COX-2 protein expression by vanadate in A549 human lung carcinoma cell line through EGF receptor and p38 MAPK-mediated pathway. Biochem Biophys Res Commun 2005; 339:562-8. [PMID: 16300728 DOI: 10.1016/j.bbrc.2005.11.045] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2005] [Accepted: 11/03/2005] [Indexed: 01/22/2023]
Abstract
Vanadate is a transition metal widely distributed in the environment. It has been reported that vanadate associated with air pollution particles can modify DNA synthesis, causing cell growth arrest, and apoptosis. Moreover, vanadium exposure was also found to cause the synthesis of inflammatory cytokines, such as interleukin-1, tumor necrosis factor-alpha, and prostaglandin E(2). Here, we found that exposure of A549 human lung carcinoma cells to vanadate led to extracellular signal-regulated kinase, c-Jun NH(2)-terminal protein kinases (JNKs), p38 mitogen-activated protein kinase (p38) activation, and COX-2 protein expression in a dose-dependent manner. SB203580, a p38 MAPK inhibitor, but not PD098059 and SP600125, specific inhibitor of MKK1 and selective inhibitor of JNK, respectively, suppressed COX-2 expression. Furthermore, the epithelial growth factor (EGF) receptor specific inhibitor (PD153035) reduced vanadate-induced COX-2 expression. However, scavenging of vanadate-induced reactive oxygen species by catalase, a specific H(2)O(2) inhibitor, or DPI, an NADPH oxidase inhibitor, resulted in no inhibition on COX-2 expression. Together, we suggested that EGF receptor and p38 MAPK signaling pathway may be involved in vanadate-induced COX-2 protein expression in A549 human lung carcinoma cell line.
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Affiliation(s)
- Pei-Shan Chien
- Institute of Biotechnology, National Cheng Kung University, No. 1 University Rd. 701, Tainan, Taiwan
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