1
|
Li Y, Ma Y, Mu C, Gu J, Li Z. Simultaneous binding characterization of different chromium speciation to serum albumin. Biometals 2024; 37:101-113. [PMID: 37610601 DOI: 10.1007/s10534-023-00531-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 08/11/2023] [Indexed: 08/24/2023]
Abstract
The binding process between three species of chromium and serum albumin (SA) was investigated, as well as the interaction between K2Cr2O7 and bovine serum albumin (BSA) under coexistence of different chromium forms. CrCl3, K2Cr2O7 and Crpic bound to SA spontaneously through Van der Waals force, and their binding constants were 103-104 M-1 at 298 K, respectively. K2Cr2O7 and Crpic both had strong binding affinity for BSA, and significantly affected the secondary structure of BSA and the microenvironment surrounding amino acid residues. Chromium exhibited a greater fluorescence quenching constant towards HSA than toward BSA, and K2Cr2O7 induced greater conformational changes in human serum albumin (HSA) than in BSA. A weak binding of CrCl3 to BSA had no significant effect on the binding affinity of K2Cr2O7 to BSA. K2Cr2O7 and BSA have a greater binding affinity when coexisting with Crpic, and K2Cr2O7 induces a greater conformational change in BSA.
Collapse
Affiliation(s)
- Ye Li
- College of Chemistry and Chemical Engineering, Bohai University, 19, Keji Rd., New Songshan District, Jinzhou, 121013, Liaoning, People's Republic of China
| | - Yanxuan Ma
- College of Chemistry and Chemical Engineering, Bohai University, 19, Keji Rd., New Songshan District, Jinzhou, 121013, Liaoning, People's Republic of China
| | - Chunyu Mu
- College of Chemistry and Chemical Engineering, Bohai University, 19, Keji Rd., New Songshan District, Jinzhou, 121013, Liaoning, People's Republic of China
| | - Jiali Gu
- College of Chemistry and Chemical Engineering, Bohai University, 19, Keji Rd., New Songshan District, Jinzhou, 121013, Liaoning, People's Republic of China.
| | - Zimu Li
- College of Chemistry and Chemical Engineering, Bohai University, 19, Keji Rd., New Songshan District, Jinzhou, 121013, Liaoning, People's Republic of China
| |
Collapse
|
2
|
Calabrese EJ, Selby PB. Comet assay and hormesis. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 341:122929. [PMID: 37979647 DOI: 10.1016/j.envpol.2023.122929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 11/06/2023] [Accepted: 11/11/2023] [Indexed: 11/20/2023]
Abstract
The paper provides the first assessment of the occurrence of hormetic dose responses using the Comet assay, a genotoxic assay. Using a priori evaluative criteria based on the Hormetic Database on peer-reviewed comet assay experimental findings, numerous examples of hormetic dose responses were obtained. These responses occurred in a large and diverse range of cell types and for agents from a broad range of chemical classes. Limited attempts were made to estimate the frequency of hormesis within comet assay experimental studies using a priori entry and evaluative criteria, with results suggesting a frequency in the 40% range. These findings are important as they show that a wide range of genotoxic chemicals display evidence that is strongly suggestive of hormetic dose responses. These findings have significant implications for study design issues, including the number of doses selected, dose range and spacing. Likewise, the widespread occurrence of hormetic dose responses in this genotoxic assay has important risk assessment implications.
Collapse
Affiliation(s)
- Edward J Calabrese
- Department of Environmental Health Sciences, Morrill I, N344, University of Massachusetts, Amherst, MA, 01003, USA.
| | - Paul B Selby
- Retired from Oak Ridge National Laboratory at Oak Ridge, TN. Home Address: 4088 Nottinghill Gate Road, Upper Arlington, OH, 43220, USA.
| |
Collapse
|
3
|
Campanelli-Morais Y, Silva CHF, Dantas MRDN, Sabry DA, Sassaki GL, Moreira SMG, Rocha HAO. A Blend Consisting of Agaran from Seaweed Gracilaria birdiae and Chromium Picolinate Is a Better Antioxidant Agent than These Two Compounds Alone. Mar Drugs 2023; 21:388. [PMID: 37504919 PMCID: PMC10381178 DOI: 10.3390/md21070388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 06/24/2023] [Accepted: 06/27/2023] [Indexed: 07/29/2023] Open
Abstract
A blend refers to the combination of two or more components to achieve properties that are superior to those found in the individual products used for their production. Gracilaria birdiae agaran (SPGb) and chromium picolinate (ChrPic) are both antioxidant agents. However, there is no documentation of blends that incorporate agarans and ChrPic. Hence, the objective of this study was to generate blends containing SPGb and ChrPic that exhibit enhanced antioxidant activity compared to SPGb or ChrPic alone. ChrPic was commercially acquired, while SPGb was extracted from the seaweed. Five blends (B1; B2; B3; B4; B5) were produced, and tests indicated B5 as the best antioxidant blend. B5 was not cytotoxic or genotoxic. H2O2 (0.6 mM) induced toxicity in fibroblasts (3T3), and this effect was abolished by B5 (0.05 mg·mL-1); neither ChrPic nor SPGb showed this effect. The cells also showed no signs of toxicity when exposed to H2O2 after being incubated with B5 and ChrPic for 24 h. In another experiment, cells were incubated with H2O2 and later exposed to SPGb, ChrPic, or B5. Again, SPGb was not effective, while cells exposed to ChrPic and B5 reduced MTT by 100%. The data demonstrated that B5 has activity superior to SPGb and ChrPic and points to B5 as a product to be used in future in vivo tests to confirm its antioxidant action. It may also be indicated as a possible nutraceutical agent.
Collapse
Affiliation(s)
- Yara Campanelli-Morais
- Programa de Pós-Graduação em Bioquimica e Biologia Molecular, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-900, Brazil
| | - Cynthia Haynara Ferreira Silva
- Programa de Pós-Graduação em Bioquimica e Biologia Molecular, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-900, Brazil
| | - Marina Rocha do Nascimento Dantas
- Programa de Pós-Graduação em Bioquimica e Biologia Molecular, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-900, Brazil
| | - Diego Araujo Sabry
- Dapartamento de Bioquímica, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-900, Brazil
| | - Guilherme Lanzi Sassaki
- Departamento de Bioquímica e Biologia Molecular, Setor de Ciências Biológicas, Universidade Federal do Paraná (UFPR), Curitiba 81531-980, Brazil
| | - Susana Margarida Gomes Moreira
- Programa de Pós-Graduação em Bioquimica e Biologia Molecular, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-900, Brazil
- Departamento de Biologia Celular e Genética, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-900, Brazil
| | - Hugo Alexandre Oliveira Rocha
- Programa de Pós-Graduação em Bioquimica e Biologia Molecular, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-900, Brazil
- Dapartamento de Bioquímica, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-900, Brazil
| |
Collapse
|
4
|
Li P, Li M, Lou X, Zhao B, Ma Q, Bian Y, Mi X. Evaluation of Hypoglycemic Activity and Sub-Acute Toxicity of the Novel Biochanin A–Chromium(III) Complex. Molecules 2022; 27:molecules27185786. [PMID: 36144522 PMCID: PMC9504010 DOI: 10.3390/molecules27185786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 08/09/2022] [Accepted: 08/31/2022] [Indexed: 11/16/2022] Open
Abstract
The novel biochanin A–chromium(III) complex was synthesized by chelating chromium with biochanin A (BCA). The structure of the complex was determined and the complex ([CrBCA3]) was composed of chromium(III) and three ligands, and the chromium content was 55 μg/mg. The hypoglycemic activity of the complex was studied in db/db mice and C57 mice. The sub-acute toxicity test of the complex was carried out by the maximum limit method in KM mice. The hypoglycemic activity showed that the complex could reduce the weight of db/db mice and lower the fasting blood glucose and random blood glucose levels. The complex also improved the organ index, oral glucose tolerance test (OGTT) and insulin tolerance test (ITT) results of db/db mice, and some of the indicators were similar to those of the positive control group after treatment with the complex. The histopathology study showed significant improvements in the liver, kidney, pancreas and skeletal muscle compared with the diabetes model group. The complex also showed a significant improvement in serum biochemical indices and antioxidant enzyme activities, as well as glycogen levels. The sub-acute toxicity study showed that the complex did not cause death or any dangerous symptoms during the study. In addition, the sub-acute toxicity study showed that the complex had no significant effect on the serum biochemical indices, antioxidant capacity and organs of normal mice. This study showed that [CrBCA3] had good hypoglycemic activity in vivo and had no sub-acute toxicity. This work provides an important reference for the development of functional hypoglycemic foods or drugs.
Collapse
Affiliation(s)
- Pengshou Li
- School of Food and Drug, Luoyang Normal University, Luoyang 471934, China
- Correspondence:
| | - Mengdan Li
- School of Food and Drug, Luoyang Normal University, Luoyang 471934, China
| | - Xinhua Lou
- School of Food and Drug, Luoyang Normal University, Luoyang 471934, China
| | - Baosheng Zhao
- Beijing Academy of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Qixiang Ma
- Cancer Institute, Fudan University Cancer Hospital and Cancer Metabolism Laboratory, Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
| | - Yumiao Bian
- School of Food and Drug, Luoyang Normal University, Luoyang 471934, China
| | - Xiliang Mi
- School of Food and Drug, Luoyang Normal University, Luoyang 471934, China
| |
Collapse
|
5
|
Halder S, Kar R, Chakraborty S, Banerjee BD. Chromium Exposure in Late Gestation Period Caused Increased Levels of Cr in Brain Tissue: Association with Alteration of Activity and Gene Expression of Antioxidant Enzymes of F1 and F2 Generation Mice. Biol Trace Elem Res 2021; 199:2635-2643. [PMID: 32892319 DOI: 10.1007/s12011-020-02367-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 09/01/2020] [Indexed: 11/28/2022]
Abstract
Chromium is a micronutrient which has found frequent use as supplements during pregnancy and could have a role in altering the antioxidant status in the brain. The present study was undertaken to estimate chromium levels in the brain, antioxidant enzyme activity with their gene expression, and learning and memory parameters on F1 and F2 generation mice when the F0 was exposed to chromium. The chromium levels in the brain were estimated using atomic absorption spectrophotometer. The enzyme activity of glutathione-s-transferase (GST) and catalase (CAT) was estimated and their gene expression was evaluated using RT-PCR. The spatial memory was tested using Morris water maze. The learning and recall memory was tested using the step down latency paradigm. The chromium levels were significantly raised in animals treated with Cr per se in F1 generation and quercetin cotreatment reduced the Cr levels in brain significantly. The enzyme activity of GST was significantly less in Cr-treated animals of both generations and this effect was significantly reversed on cotreatment with quercetin. The gene expression of GST matched the enzyme activity. However, catalase activity did not show significant decrease with Cr but cotreatment with quercetin resulted in significant decrease compared with control and this effect was not matched by its gene expression. We observed no significant change in learning and memory parameters in both generations following Cr exposure. Thus, this study demonstrates that chromium exposure in gestation causes changes in enzyme activity especially GST and this change was matched by change in gene expression in GST but not CAT. There was no effect on memory at the given dose.
Collapse
Affiliation(s)
- Sumita Halder
- Department of Pharmacology, University College of Medical Sciences and G. T. B. Hospital, New Delhi, 110095, India.
| | - Rajarshi Kar
- Department of Biochemistry, University College of Medical Sciences and G. T. B. Hospital, New Delhi, 110095, India
| | - Sucharita Chakraborty
- Geological Oceanographic Division, National Institute of Oceanograhy, Panaji, Goa, India
- Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur, India
| | - Basu D Banerjee
- Department of Biochemistry, University College of Medical Sciences and G. T. B. Hospital, New Delhi, 110095, India
| |
Collapse
|
6
|
Patel VD, Shamsi SA, Sutherland K. Capillary electromigration techniques coupled to mass spectrometry: Applications to food analysis. Trends Analyt Chem 2021; 139. [DOI: 10.1016/j.trac.2021.116240] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
7
|
Wei L, Li Y, Ye H, Xiao J, Hogstrand C, Green I, Guo Z, Han D. Dietary Trivalent Chromium Exposure Up-Regulates Lipid Metabolism in Coral Trout: The Evidence From Transcriptome Analysis. Front Physiol 2021; 12:640898. [PMID: 33732169 PMCID: PMC7959734 DOI: 10.3389/fphys.2021.640898] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 01/25/2021] [Indexed: 11/14/2022] Open
Abstract
Diet quality greatly affects an animal’s performance and metabolism. Despite the fact that trivalent chromium [Cr(III)] is considered an essential element and is widely used in nutritional supplements for animals and humans, the potential toxicity of Cr(III) is unclear. Here, liver transcriptome sequencing was performed on coral trout (Plectropomus leopardus) exposed to 200 mg kg–1 of dietary organic Cr(III) [as chromium picolinate (CrPic)] for 8 weeks. One-hundred-and thirteen differentially expressed genes (DEGs) were identified in response to Cr(III) stress, in comparison to the control, including 31 up-regulated and 82 down-regulated DEGs. Clusters of Orthologous Groups of proteins (COG) classifies DEGs into 15 functional categories, with the predominant category being related to lipid transport and metabolism (9.73%). The Kyoto Encyclopedia of Genes and Genomes (KEGG) assigned DEGs to six major categories with robust DEGs as part of the lipid metabolism pathway (18.58%). Moreover, KEGG functional enrichment analysis showed that these DEGs are primarily related to steroid biosynthesis, terpenoid backbone biosynthesis, and steroid hormone biosynthesis pathways, of which steroid biosynthesis was the most significant pathway, and 12 key up-regulated DEGs (dhcr7, dhcr24, ebp, lss, msmo1, sqle, cyp51, tm7sf2, sc5dl, fdft1, nsdhl, and hsd17b7) were found for steroid biosynthesis pathways. To validate the RNA sequencing data using quantitative real-time PCR (qRT-PCR), qRT-PCR results indicate that the expression of genes encoding HMGCR, TM7SF2, TRYP2, CTRL, EBP, LSS, and CYP51 were induced, while those encoding THRSP, LCE, and MCM5 were reduced, consistent with RNA-seq results. This findings provides the first evidence that a long-term high dose of Cr(III) intake causes lipid metabolism disorder and potential toxicity in fish. Cautious health risk assessment of dietary Cr(III) intake is therefore highly recommended for the commercial and/or natural diets of aquatic animals, which has previously largely been ignored.
Collapse
Affiliation(s)
- Lu Wei
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Life and Pharmaceutical Sciences, College of Food Science and Engineering, Hainan University, Haikou, China
| | - Yu Li
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Life and Pharmaceutical Sciences, College of Food Science and Engineering, Hainan University, Haikou, China
| | - Hengzhen Ye
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Life and Pharmaceutical Sciences, College of Food Science and Engineering, Hainan University, Haikou, China
| | - Juan Xiao
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Life and Pharmaceutical Sciences, College of Food Science and Engineering, Hainan University, Haikou, China
| | - Christer Hogstrand
- Metals Metabolism Group, School of Life Course Sciences, King's College London, London, United Kingdom
| | - Iain Green
- Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Poole, United Kingdom
| | - Zhiqiang Guo
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Life and Pharmaceutical Sciences, College of Food Science and Engineering, Hainan University, Haikou, China
| | - Dong Han
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, China
| |
Collapse
|
8
|
Guo X, Seo JE, Li X, Mei N. Genetic toxicity assessment using liver cell models: past, present, and future. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2019; 23:27-50. [PMID: 31746269 DOI: 10.1080/10937404.2019.1692744] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Genotoxic compounds may be detoxified to non-genotoxic metabolites while many pro-carcinogens require metabolic activation to exert their genotoxicity in vivo. Standard genotoxicity assays were developed and utilized for risk assessment for over 40 years. Most of these assays are conducted in metabolically incompetent rodent or human cell lines. Deficient in normal metabolism and relying on exogenous metabolic activation systems, the current in vitro genotoxicity assays often have yielded high false positive rates, which trigger unnecessary and costly in vivo studies. Metabolically active cells such as hepatocytes have been recognized as a promising cell model in predicting genotoxicity of carcinogens in vivo. In recent years, significant advances in tissue culture and biological technologies provided new opportunities for using hepatocytes in genetic toxicology. This review encompasses published studies (both in vitro and in vivo) using hepatocytes for genotoxicity assessment. Findings from both standard and newly developed genotoxicity assays are summarized. Various liver cell models used for genotoxicity assessment are described, including the potential application of advanced liver cell models such as 3D spheroids, organoids, and engineered hepatocytes. An integrated strategy, that includes the use of human-based cells with enhanced biological relevance and throughput, and applying the quantitative analysis of data, may provide an approach for future genotoxicity risk assessment.
Collapse
Affiliation(s)
- Xiaoqing Guo
- Division of Genetic and Molecular Toxicology, National Center for Toxicological Research, Jefferson, AR, USA
| | - Ji-Eun Seo
- Division of Genetic and Molecular Toxicology, National Center for Toxicological Research, Jefferson, AR, USA
| | - Xilin Li
- Division of Genetic and Molecular Toxicology, National Center for Toxicological Research, Jefferson, AR, USA
| | - Nan Mei
- Division of Genetic and Molecular Toxicology, National Center for Toxicological Research, Jefferson, AR, USA
| |
Collapse
|
9
|
Synthesis, spectroscopic characterization, and theoretical studies on the substitution reaction of chromium(III) picolinate. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.04.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
10
|
Chromium malate alleviates high-glucose and insulin resistance in L6 skeletal muscle cells by regulating glucose uptake and insulin sensitivity signaling pathways. Biometals 2018; 31:891-908. [DOI: 10.1007/s10534-018-0132-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 07/11/2018] [Indexed: 01/10/2023]
|
11
|
Jiang L, Vincent JB, Bailey MM. [Cr 3O(O 2CCH 2CH 3) 6(H 2O) 3]NO 3·H 2O (Cr3) Toxicity Potential in Bacterial and Mammalian Cells. Biol Trace Elem Res 2018; 183:342-350. [PMID: 28879636 DOI: 10.1007/s12011-017-1132-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 08/14/2017] [Indexed: 01/19/2023]
Abstract
Chromium(III) has generally been considered to be essential for proper carbohydrate and lipid metabolism, and, despite recent evidence to the contrary, chromium(III)-containing compounds remain one of the most popular commercial dietary supplements. Cr3, or [Cr3O(O2CCH2CH3)6(H2O)3]NO3·H2O, is a trivalent chromium compound that is a promising chromium nutritional supplement. Studies with Cr3 have indicated that it is non-toxic in developmental and short- and long-term exposure studies in rodents, but the safety of this compound to chromosomes and cells has not been explored. The current study evaluates the mutagenicity, cytotoxicity, and clastogenicity of Cr3 in bacterial and mammalian cells and compares these results with similar studies using the bestselling Cr(III) nutritional supplement, chromium picolinate (CrPic). The mutagenicity of CrPic and Cr3 was tested in Escherichia coli FX-11 and Salmonella typhimurium (TA 98 and TA 100). Cytotoxicity was measured as a decrease in plating efficiency relative to controls after treatment with Cr3 and CrPic for 24 h in CHO K1 cells. Clastogenicity was measured by counting the number of metaphases damaged and of the total number chromosomal aberrations in CHO K1 cells. Mutagenesis assays in E. coli and S. typhimurium were negative. All treatments of Cr3 produced ≥ 84% plating efficiency except 80 μg/cm2, which reduced the plating efficiency to 62%. Cr3 at any treatment level did not produce a significant increase in the number of cells with abnormal metaphases, while treatments using ≥ 40 μg/cm2 of CrPic elevated the number significantly. These data suggest that Cr3 is significantly less mutagenic in bacteria cells and less clastogenic in CHO K1 cells, while CrPic is clastogenic in CHO K1 cells.
Collapse
Affiliation(s)
- Lu Jiang
- Department of Pharmacology, Toxicology and Therapeutics, The University of Kansas Medical Center, Overland Park, KS, USA
| | - John B Vincent
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL, USA
| | - Melissa M Bailey
- Department of Biological Sciences, Emporia State University, Emporia, KS, USA.
| |
Collapse
|
12
|
Shil K, Pal S. Metabolic adaptability in hexavalent chromium-treated renal tissue: an in vivo study. Clin Kidney J 2017; 11:222-229. [PMID: 29644063 PMCID: PMC5887570 DOI: 10.1093/ckj/sfx069] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 05/30/2017] [Indexed: 12/17/2022] Open
Abstract
Background Hexavalent chromium [Cr(VI)], an environmental pollutant that originates mostly from anthropogenic sources, is a serious threat to human health. After entering into cells, Cr(VI) is capable of producing excessive free radicals and causing tissue damage. The present study aims to reveal the toxic manifestation of Cr(VI) on the metabolic activity of renal tissue. Methods Male Swiss albino mice were treated orally with potassium dichromate (K2Cr2O7) at a dose of 10 mg/kg body weight for a period of 30 days. Important tricarboxylic acid (TCA) cycle enzyme activities like isocitrate dehydrogenase, succinate dehydrogenase and malate dehydrogenase, as well as the activities of enzymes involved in oxidative phosphorylation such as Nicotinamide adenine dinucleotide (NADH) dehydrogenase, were measured. Additionally, transaminase and protease (pronase, cathepsin and trypsin) activities, tissue protein and free amino nitrogen were estimated in renal tissue. Glucose-6-phosphatase, glucose-6-phosphate dehydrogenase and alkaline phosphatase activities, as well as lactic acid, pyruvic acid and chromium contents, of kidneys were determined following standard protocols. Kidney histology was performed by hematoxylin and eosin staining. Results Cr(VI) suppresses the rate-limiting enzymes of the TCA cycle and oxidative phosphorylation indicating an inhibition of renal ATP production. It decreases protease activity by eliminating the protein substrates and alters the gluconeogenic pathway. Cr(VI) worsens the normophysiological attributes of renal tissue by enhancing the activity of alkaline phosphatase, pointing towards kidney disease. Histopathological observations confirmed these biochemical results through the presence of chronic tubular nephritis and altered glomerular structure. Cr(VI) retention occurs to a greater extent in renal tissue, which intensifies the toxic manifestation of this pollutant in the kidney. Conclusions Cr(VI) disrupts the metabolic interaction between carbohydrates and proteins in mammalian renal tissue.
Collapse
Affiliation(s)
- Kanu Shil
- Nutritional Biochemistry and Toxicology Laboratory, Department of Human Physiology, Tripura University, Suryamaninagar, West Tripura, India
| | - Sudipta Pal
- Nutritional Biochemistry and Toxicology Laboratory, Department of Human Physiology, Tripura University, Suryamaninagar, West Tripura, India
| |
Collapse
|
13
|
Novotnik B, Ščančar J, Milačič R, Filipič M, Žegura B. Cytotoxic and genotoxic potential of Cr(VI), Cr(III)-nitrate and Cr(III)-EDTA complex in human hepatoma (HepG2) cells. CHEMOSPHERE 2016; 154:124-131. [PMID: 27043378 DOI: 10.1016/j.chemosphere.2016.03.118] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 03/04/2016] [Accepted: 03/25/2016] [Indexed: 06/05/2023]
Abstract
Chromium (Cr) and ethylenediaminetetraacetate (EDTA) are common environmental pollutants and can be present in high concentrations in surface waters at the same time. Therefore, chelation of Cr with EDTA can occur and thereby stable Cr(III)-EDTA complex is formed. Since there are no literature data on Cr(III)-EDTA toxicity, the aim of our work was to evaluate and compare Cr(III)-EDTA cytotoxic and genotoxic activity with those of Cr(VI) and Cr(III)-nitrate in human hepatoma (HepG2) cell line. First the effect of Cr(VI), Cr(III)-nitrate and Cr(III)-EDTA on cell viability was studied in the concentration range from 0.04 μg mL(-1) to 25 μg mL(-1) after 24 h exposure. Further the influence of non-cytotoxic concentrations of Cr(VI), Cr(III)-nitrate and Cr(III)-EDTA on DNA damage and genomic stability was determined with the comet assay and cytokinesis block micronucleus cytome assay, respectively. Cell viability was decreased only by Cr(VI) at concentrations above 1.0 μg mL(-1). Cr(VI) at ≥0.2 μg mL(-1) and Cr(III) at ≥1.0 μg mL(-1) induced DNA damage, while after Cr(III)-EDTA exposure no formation DNA strand breaks was determined. Statistically significant formation of micronuclei was induced only by Cr(VI) at ≥0.2 μg mL(-1), while no influence on the frequency of nuclear buds nor nucleoplasmic bridges was observed at any exposure. This study provides the first evidence that Cr(III)-EDTA did not induce DNA damage and had no influence on the genomic stability of HepG2 cells.
Collapse
Affiliation(s)
- Breda Novotnik
- Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; Jožef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia
| | - Janez Ščančar
- Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; Jožef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia
| | - Radmila Milačič
- Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; Jožef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia
| | - Metka Filipič
- National Institute of Biology, Department for Genetic Toxicology and Cancer Biology, Večna pot 111, Ljubljana, Slovenia
| | - Bojana Žegura
- National Institute of Biology, Department for Genetic Toxicology and Cancer Biology, Večna pot 111, Ljubljana, Slovenia.
| |
Collapse
|
14
|
Feng W, Wu H, Li Q, Zhou Z, Chen Y, Zhao T, Feng Y, Mao G, Li F, Yang L, Wu X. Evaluation of 90-day Repeated Dose Oral Toxicity, Glycometabolism, Learning and Memory Ability, and Related Enzyme of Chromium Malate Supplementation in Sprague-Dawley Rats. Biol Trace Elem Res 2015; 168:181-95. [PMID: 25900579 DOI: 10.1007/s12011-015-0341-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 04/12/2015] [Indexed: 11/24/2022]
Abstract
Our previous study showed that chromium malate improved the regulation of blood glucose in mice with alloxan-induced diabetes. The present study was designed to evaluate the 90-day oral toxicity of chromium malate in Sprague-Dawley rats. The present study inspected the effect of chromium malate on glycometabolism, glycometabolism-related enzymes, lipid metabolism, and learning and memory ability in metabolically healthy Sprague-Dawley rats. The results showed that all rats survived and pathological, toxic, feces, and urine changes were not observed. Chromium malate did not cause measurable damage on liver, brain, and kidney. The fasting blood glucose, serum insulin, insulin resistance index, C-peptide, hepatic glycogen, glucose-6-phosphate dehydrogenase, glucokinase, total cholesterol, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, and triglyceride levels of normal rats in chromium malate groups had no significant change when compared with control group and chromium picolinate group under physiologically relevant conditions. The serum and organ content of Cr in chromium malate groups had no significant change compared with control group. No significant changes were found in morris water maze test and superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and true choline esterase (TChE) activity. The results indicated that supplementation with chromium malate did not cause measurable toxicity and has no obvious effect on glycometabolism and related enzymes, learning and memory ability, and related enzymes and lipid metabolism of female and male rats. The results of this study suggest that chromium malate is safe for human consumption.
Collapse
Affiliation(s)
- Weiwei Feng
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Rd, Zhenjiang, 212013, Jiangsu, China
| | - Huiyu Wu
- School of Pharmacy, Jiangsu University, 301 Xuefu Rd, Zhenjiang, 212013, Jiangsu, China
| | - Qian Li
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Rd, Zhenjiang, 212013, Jiangsu, China
| | - Zhaoxiang Zhou
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Rd, Zhenjiang, 212013, Jiangsu, China
| | - Yao Chen
- School of the Environment and Safety Engineering, Jiangsu University, 301 Xuefu Rd, Zhenjiang, 212013, Jiangsu, China
| | - Ting Zhao
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Rd, Zhenjiang, 212013, Jiangsu, China
| | - Yun Feng
- School of Medical Science and Laboratory Medicine, Jiangsu University, 301 Xuefu Rd, Zhenjiang, 212013, Jiangsu, China
| | - Guanghua Mao
- School of the Environment and Safety Engineering, Jiangsu University, 301 Xuefu Rd, Zhenjiang, 212013, Jiangsu, China
| | - Fang Li
- School of Medical Science and Laboratory Medicine, Jiangsu University, 301 Xuefu Rd, Zhenjiang, 212013, Jiangsu, China
| | - Liuqing Yang
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Rd, Zhenjiang, 212013, Jiangsu, China.
| | - Xiangyang Wu
- School of the Environment and Safety Engineering, Jiangsu University, 301 Xuefu Rd, Zhenjiang, 212013, Jiangsu, China.
| |
Collapse
|
15
|
Chen Y, Chen J, Xi Z, Yang G, Wu Z, Li J, Fu F. Simultaneous analysis of Cr(III), Cr(VI), and chromium picolinate in foods using capillary electrophoresis-inductively coupled plasma mass spectrometry. Electrophoresis 2015; 36:1208-15. [DOI: 10.1002/elps.201500015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 02/09/2015] [Accepted: 02/10/2015] [Indexed: 11/09/2022]
Affiliation(s)
- YiQuan Chen
- Department of Chemistry, Key Laboratory of Analysis and Detection for Food Safety of Ministry of Education, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety; Fuzhou University; Fuzhou Fujian P. R. China
| | - JinFa Chen
- Department of Chemistry, Key Laboratory of Analysis and Detection for Food Safety of Ministry of Education, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety; Fuzhou University; Fuzhou Fujian P. R. China
| | - Zhiming Xi
- Department of Chemistry, Key Laboratory of Analysis and Detection for Food Safety of Ministry of Education, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety; Fuzhou University; Fuzhou Fujian P. R. China
| | - Guidi Yang
- Department of Plant Protection; Fujian Agriculture and Forest University; Fuzhou Fujian P. R. China
| | - Zujian Wu
- Department of Plant Protection; Fujian Agriculture and Forest University; Fuzhou Fujian P. R. China
| | - JianRong Li
- Food Safety Key Laboratory of Liaoning Province; Bohai University; Jinzhou Liaoning P. R. China
| | - FengFu Fu
- Department of Chemistry, Key Laboratory of Analysis and Detection for Food Safety of Ministry of Education, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety; Fuzhou University; Fuzhou Fujian P. R. China
| |
Collapse
|
16
|
Christian WV, Oliver LD, Paustenbach DJ, Kreider ML, Finley BL. Toxicology-based cancer causation analysis of CoCr-containing hip implants: a quantitative assessment of genotoxicity and tumorigenicity studies. J Appl Toxicol 2014; 34:939-67. [DOI: 10.1002/jat.3039] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 05/23/2014] [Accepted: 05/24/2014] [Indexed: 12/12/2022]
Affiliation(s)
| | - Lindsay D. Oliver
- Cardno ChemRisk; LLC, 4840 Pearl East Circle, Suite 300 West Boulder CO 80301 USA
| | | | - Marisa L. Kreider
- Cardno ChemRisk, LLC; 20 Stanwix St., Suite 505 Pittsburgh PA 15222 USA
| | - Brent L. Finley
- Cardno ChemRisk; LLC, 231 Front St., Suite 201 Brooklyn NY 11201 USA
| |
Collapse
|
17
|
Scientific Opinion on the risks to public health related to the presence of chromium in food and drinking water. EFSA J 2014. [DOI: 10.2903/j.efsa.2014.3595] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
|
18
|
Bai Y, Zhao X, Qi C, Wang L, Cheng Z, Liu M, Liu J, Yang D, Wang S, Chai T. Effects of chromium picolinate on the viability of chick embryo fibroblast. Hum Exp Toxicol 2013; 33:403-13. [DOI: 10.1177/0960327113499042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Chromium picolinate (CrPic), which is used as a nutritional supplement and to treat type 2 diabetes, has gained much attention because of its cytotoxicity. This study evaluated the effects of CrPic on the viability of the chick embryo fibroblast (CEF) using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay, morphological detection, and flow cytometry. The results show that lower concentrations of CrPic (8 and 16 μM) did not damage CEF viability ( p > 0.05). However, higher CrPic concentrations (400 and 600 μM) indicated a highly significant effect on the production of intracellular reactive oxygen species, alteration of mitochondrial membrane potential, intracellular calcium ion concentration, and the apoptosis rate ( p < 0.01), contrary to lower CrPic concentrations (8 and 16 μM) and control group. Moreover, apoptotic morphological changes induced by these processes in CEF were confirmed using Hoechst 33258 staining. Cell death induced by higher concentrations of CrPic was caused by an apoptotic and a necrotic mechanism, whereas the main mechanism of oxidative stress-induced mitochondrial dysfunction was apoptotic death.
Collapse
Affiliation(s)
- Y Bai
- College of Veterinary Medicine, Research Center for Animal Disease Control Engineering Shandong Province, Shandong Agricultural University, Tai’an, China
| | - X Zhao
- College of Veterinary Medicine, Research Center for Animal Disease Control Engineering Shandong Province, Shandong Agricultural University, Tai’an, China
| | - C Qi
- Central Hospital of Tai’an City, Tai’an, Shandong, China
| | - L Wang
- College of Veterinary Medicine, Research Center for Animal Disease Control Engineering Shandong Province, Shandong Agricultural University, Tai’an, China
| | - Z Cheng
- College of Veterinary Medicine, Research Center for Animal Disease Control Engineering Shandong Province, Shandong Agricultural University, Tai’an, China
| | - M Liu
- College of Veterinary Medicine, Research Center for Animal Disease Control Engineering Shandong Province, Shandong Agricultural University, Tai’an, China
| | - J Liu
- College of Veterinary Medicine, Research Center for Animal Disease Control Engineering Shandong Province, Shandong Agricultural University, Tai’an, China
| | - D Yang
- College of Veterinary Medicine, Research Center for Animal Disease Control Engineering Shandong Province, Shandong Agricultural University, Tai’an, China
| | - S Wang
- College of Veterinary Medicine, Research Center for Animal Disease Control Engineering Shandong Province, Shandong Agricultural University, Tai’an, China
| | - T Chai
- Sino-German Cooperative Research Centre for Zoonosis of Animal Origin of Shandong Province, Tai’an, China
| |
Collapse
|
19
|
Yeghiazaryan K, Schild HH, Golubnitschaja O. Chromium-picolinate therapy in diabetes care: individual outcomes require new guidelines and navigation by predictive diagnostics. Infect Disord Drug Targets 2013; 12:332-9. [PMID: 23017160 DOI: 10.2174/187152612804142215] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 07/05/2012] [Accepted: 07/16/2012] [Indexed: 11/22/2022]
Abstract
AIMS Nephropathy is the leading secondary complication of metabolic syndrome. Nutritional supplement by chromium-picolinate is assumed to have renoprotective effects. However, potential toxic effects reported increase the concerns about the safety of chromium-picolinate. The experimental design aimed at determining, whether the treatment with clinically relevant doses of chromium-picolinate can harm individual oucomes through DNA damage and extensive alterations in central detoxification / cell-cycle regulating pathways in treatment of diabetes. METHODS The study was performed in a double-blind manner. Well-acknowledged animal model of db/db-mice and clinically relevant doses of chromium- picolinate were used. As an index of DNA-damage, measurement of DNA-breaks was performed using "Comet Assay"-analysis. Individual and group-specific expression patterns of SOD-1 and P53 were evaluated to get insights into central detoxification and cell-cycle regulating pathways under the treatment conditions. RESULTS Experimental data revealed highly individual reaction towards the treatment conditions. The highest variability of DNA-damage was monitored under the prolonged treatment with high dosage of CrPic. Expression patterns demonstrated a correlation with the subcellular imaging and dosage-dependent suppression under the chromium-picolinate treatment. INTERPRETATION AND RECOMMENDATIONS: Population at-risk for diabetes is huge and increasing in pandemic scale. One of the reasons might be the failed attempt to prevent the disease by application of artificial supplements and drugs with hardly recognised individual risks. Consequently, a multimodal approach of integrative medicine by predictive diagnostics, targeted prevention and individually created treatment algorithms is highly desirable.
Collapse
Affiliation(s)
- Kristina Yeghiazaryan
- Department of Radiology, Rheinische Friedrich-Wilhelms-University of Bonn, Sigmund-Freud-Str. 25, D-53105 Bonn, Germany
| | | | | |
Collapse
|
20
|
Chen SY, Lien TF. Toxicity evaluation of chromium picolinate nanoparticles in vivo and in vitro in rat. Biol Trace Elem Res 2013; 151:247-55. [PMID: 23229537 DOI: 10.1007/s12011-012-9545-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Accepted: 11/01/2012] [Indexed: 11/25/2022]
Abstract
The toxicity of nanoCrpic is still not understood and needs further investigation. Thus, this study investigated the effect of chromium picolinate nanoparticles (nanoCrpic) on the toxicity in vivo and in vitro in rat. In the in vivo study, 36 rats (Wistar, 8-week-old) were randomly divided into the control group (fed basal diet), the low-dose (300 ppb, μg/kg), and high-dose (1,000 ppb) nanoCrpic groups. The trial was conducted for 2 months; at the final stage of the trial, the rats were sacrificed, liver and kidney were examined, and samples of tissues were taken for histological examination. Hepatocytes isolated from 10-week-old Wistar male rats were used for in vitro study to examine the degree of DNA damage following exposure to 0 and 0.294 mM of H(2)O(2) for 30 min. Incubation medium was supplemented with 0 (control), 100, and 300 ppb nanoCrpic. In vivo study indicated that no lesions of liver or kidney were detected in 300 and 1,000 ppb nanoCrpic fed rats. The in vitro study evaluated DNA damage according to the percentage and distance of the fragments migration and revealed that there was insignificant difference between the nanoCrpic and control groups (p > 0.05). This study indicated that nanoCrpic at 300-1,000 ppb in vivo and at 100-300 ppb in vitro showed no signs of toxicity to rats.
Collapse
Affiliation(s)
- Shih-Yi Chen
- Department of Animal Science, National Chiayi University, Luh Liau Li, Chiayi, Taiwan, Republic of China
| | | |
Collapse
|
21
|
Witt KL, Stout MD, Herbert RA, Travlos GS, Kissling GE, Collins BJ, Hooth MJ. Mechanistic Insights from the NTP Studies of Chromium. Toxicol Pathol 2013; 41:326-42. [DOI: 10.1177/0192623312469856] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Hexavalent chromium (Cr(VI)) is a contaminant of water and soil and is a human lung carcinogen. Trivalent chromium (Cr(III)), a proposed essential element, is ingested by humans in the diet and in dietary supplements such as chromium picolinate (CP). The National Toxicology Program (NTP) demonstrated that Cr(VI) is also carcinogenic in rodents when administered in drinking water as sodium dichromate dihydrate (SDD), inducing neoplasms of the oral cavity and small intestine in rats and mice, respectively. In contrast, there was no definitive evidence of toxicity or carcinogenicity following exposure to Cr(III) administered in feed as CP monohydrate (CPM). Cr(VI) readily enters cells via nonspecific anion channels, in contrast to Cr(III), which cannot easily pass through the cell membrane. Extracellular reduction of Cr(VI) to Cr(III), which occurs primarily in the stomach, is considered a mechanism of detoxification, while intracellular reduction is thought to be a mechanism of genotoxicity and carcinogenicity. Tissue distribution studies in additional groups of male rats and female mice demonstrated higher Cr concentrations in tissues following exposure to Cr(VI) compared to controls and Cr(III) exposure at a similar external dose, indicating that some of the Cr(VI) escaped gastric reduction and was distributed systemically. The multiple potential pathways of Cr-induced genotoxicity will be discussed.
Collapse
Affiliation(s)
- Kristine L. Witt
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | - Matthew D. Stout
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | - Ronald A. Herbert
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | - Gregory S. Travlos
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | - Grace E. Kissling
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | - Bradley J. Collins
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | - Michelle J. Hooth
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| |
Collapse
|
22
|
Golubnitschaja O, Yeghiazaryan K. Opinion controversy to chromium picolinate therapy's safety and efficacy: ignoring 'anecdotes' of case reports or recognising individual risks and new guidelines urgency to introduce innovation by predictive diagnostics? EPMA J 2012; 3:11. [PMID: 23039227 PMCID: PMC3515400 DOI: 10.1186/1878-5085-3-11] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Accepted: 08/17/2012] [Indexed: 01/13/2023]
Abstract
Due to the important physiologic function of trivalent chromium in glucose/insulin homeostasis, some commercial organisations promote Cr3+ supplements in maintaining proper carbohydrate and lipid metabolism; regulation of reducing carbohydrate carvings and appetite; prevention of insulin resistance and glucose intolerance; regulation of body composition, including reducing fat mass and increasing lean body mass; optimal body building for athletes; losing weight; treatment of atypical depression as an antidepressant; and prevention of obesity and type 2 diabetes mellitus. On one hand, case reports are commented as 'nonevidence-based anecdotes'. On the other hand, a number of independent studies warn against adverse health outcomes assigned to chromium picolinate (CrPic) dietary application. This review analyses opinion controversies, demonstrates highly individual reactions towards CrPic dietary supplements and highlights risks when the dietary supplements are used freely as therapeutic agents, without application of advanced diagnostic tools to predict individual outcomes.
Collapse
Affiliation(s)
- Olga Golubnitschaja
- Department of Radiology, Rheinische Friedrich-Wilhelms-University of Bonn, Sigmund-Freud-Str, 25, Bonn, 53105, Germany.
| | | |
Collapse
|
23
|
Monteiro C, Santos C, Pinho S, Oliveira H, Pedrosa T, Dias MC. Cadmium-induced cyto- and genotoxicity are organ-dependent in lettuce. Chem Res Toxicol 2012; 25:1423-34. [PMID: 22624971 DOI: 10.1021/tx300039t] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Cadmium is a priority pollutant. Its mechanisms and effects within different plant organs remain unclear. Here, cyto-genotoxicity biomarkers were evaluated in roots and leaves after Cd exposure (0, 1, 10, and 50 μM) of the model crop Lactuca sativa L. (cv. "Reine de Mai"). Overall, superoxide dismutase (SOD) and catalase (CAT) activities were stimulated in leaves, where Cd accumulation was lower in comparison to that in roots. In roots, SOD and peroxidase (POX, APX) activities were stimulated. Moreover, in both organs glutathione reductase (GR) was not affected by Cd. Overall, the H(2)O(2) content increased in both organs, while the total antioxidant capacity decreased in leaves and increased in roots with Cd concentrations. In both organs, lipid and protein oxidation rose with consequent increase of membrane permeability. Simultaneously, the comet assay showed that tail moment, tail length, and % tail DNA were maximum for 1 μM. For 10 μM, shorter tails were found suggesting induced Cd-DNA adducts that lead to DNA-DNA/DNA-protein cross-links, and/or formation of longer DNA fragments, and/or impairment of DNA repair mechanisms, while at 50 μM, nucleoids sensitivity to the technique was evident. This result was consistent with the maximum micronuclei frequency found for the 10 μM Cd dose in roots, suggesting that the surviving cells in this organ had an increase of mitotic catastrophe and that DNA repair systems for blocking cell cycle were dysfunctional. In lower Cd concentrations, root cells might have developed strategies to repair damaged DNA by blocking the cell cycle at specific checkpoints, thus avoiding mitotic catastrophe. Roots at 1 μM showed a cell cycle blockage trend at the G(2) checkpoint, while those at higher concentrations presented S phase delay. We finally discuss a general model of Cd-organ interaction covering these cyto- and genotoxic effects and the potential use of this cultivar in phytoremediation strategies.
Collapse
Affiliation(s)
- Cristina Monteiro
- Department of Biology and CESAM, Laboratory of Biotechnology and Cytomics, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | | | | | | | | | | |
Collapse
|
24
|
Wise SS, Wise JP. Chromium and genomic stability. Mutat Res 2012; 733:78-82. [PMID: 22192535 PMCID: PMC4138963 DOI: 10.1016/j.mrfmmm.2011.12.002] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Revised: 11/15/2011] [Accepted: 12/05/2011] [Indexed: 10/14/2022]
Abstract
Many metals serve as micronutrients which protect against genomic instability. Chromium is most abundant in its trivalent and hexavalent forms. Trivalent chromium has historically been considered an essential element, though recent data indicate that while it can have pharmacological effects and value, it is not essential. There is no data indicating that trivalent chromium promotes genomic stability and, instead may promote genomic instability. Hexavalent chromium is widely accepted as highly toxic and carcinogenic with no nutritional value. Recent data indicate that it causes genomic instability and also has no role in promoting genomic stability.
Collapse
Affiliation(s)
- Sandra S. Wise
- Wise Laboratory of Environmental and Genetic Toxicology, Maine Center for Toxicology and Environmental Health, and Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME 04104
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, Maine Center for Toxicology and Environmental Health, and Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME 04104
| |
Collapse
|
25
|
Evaluation of the Correlation Between Genetic Damage and Occupational Chromate Exposure Through BNMN Frequencies. J Occup Environ Med 2012; 54:166-70. [DOI: 10.1097/jom.0b013e31823d86b4] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
26
|
Wu XY, Li F, Xu WD, Zhao JL, Zhao T, Liang LH, Yang LQ. Anti-hyperglycemic activity of chromium(III) malate complex in alloxan-induced diabetic rats. Biol Trace Elem Res 2011; 143:1031-43. [PMID: 21161430 DOI: 10.1007/s12011-010-8916-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2010] [Accepted: 12/01/2010] [Indexed: 10/18/2022]
Abstract
The synthesis, characterization, anti-hyperglycemic activity, oxidative DNA damage capacity, and acute toxicity of chromium(III) malate complex [Cr2(LMA)3] were described. [Cr2(LMA)3] was synthesized in a single-step reaction by chelating chromium(III) with L-malic acid in aqueous solution. Based on elemental analysis, thermodynamic analysis, and spectroscopy studies, the molecular formula of [Cr2(LMA)3] was inferred as Cr2(C4H4O5)3·5H2O. Daily treatment with 2.85-17.10 mg/kg body mass of [Cr2(LMA)3] in alloxan-induced diabetic rats for 2 weeks indicated that low-molecular-weight organic chromium complex [Cr2(LMA)3] had better bioavailability and more beneficial influences on the improvement of controlling blood glucose, serum lipid, and liver glycogen levels compared with CrCl3·6H2O. [Cr2(LMA)3] did not cause oxidative DNA damage under physiologically relevant conditions. Acute toxicity studies revealed no-measurable toxicity of the [Cr2(LMA)3]. Collectively, these results suggest that [Cr2(LMA)3] may represent a novel, proper chromium supplement with potential therapeutic value to control blood glucose and serum lipid in diabetes.
Collapse
Affiliation(s)
- Xiang-Yang Wu
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Rd., 212013, Zhenjiang, Jiangsu, China
| | | | | | | | | | | | | |
Collapse
|
27
|
Renal and glycemic effects of high-dose chromium picolinate in db/db mice: assessment of DNA damage. J Nutr Biochem 2011; 23:977-85. [PMID: 21959055 DOI: 10.1016/j.jnutbio.2011.05.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Revised: 04/18/2011] [Accepted: 05/04/2011] [Indexed: 12/19/2022]
Abstract
This study examined renal and glycemic effects of chromium picolinate [Cr(pic)3] supplementation in the context of its purported potential for DNA damage. In preventional protocol, male obese diabetic db/db mice were fed diets either lacking or containing 5, 10 or 100 mg/kg chromium as Cr(pic)3 from 6 to 24 weeks of age; male lean nondiabetic db/m mice served as controls. Untreated db/db mice displayed increased plasma glucose and insulin, hemoglobin A1c, renal tissue advanced glycation end products, albuminuria, glomerular mesangial expansion, urinary 8-hydroxydeoxyguanosine (an index of oxidative DNA damage) and renal tissue immunostaining for γH2AX (a marker of double-strand DNA breaks) compared to db/m controls. Creatinine clearance was lower in untreated db/db mice than their db/m controls, while blood pressure was similar. High Cr(pic)3 intake (i.e., 100-mg/kg diet) mildly improved glycemic status and albuminuria without affecting blood pressure or creatinine clearance. Treatment with Cr(pic)3 did not increase DNA damage despite marked renal accumulation of chromium. In interventional protocol, effects of diets containing 0, 100 and 250 mg/kg supplemental chromium, from 12 to 24 weeks of age, were examined in db/db mice. The results generally revealed similar effects to those of the 100-mg/kg diet of the preventional protocol. In conclusion, the severely hyperglycemic db/db mouse displays renal structural and functional abnormalities in association with DNA damage. High-dose Cr(pic)3 treatment mildly improves glycemic control, and it causes moderate reduction in albuminuria, without affecting the histopathological appearance of the kidney and increasing the risk for DNA damage.
Collapse
|
28
|
Yeghiazaryan K, Peeva V, Shenoy A, Schild HH, Golubnitschaja O. Chromium-picolinate therapy in diabetes care: molecular and subcellular profiling revealed a necessity for individual outcome prediction, personalised treatment algorithms and new guidelines. Infect Disord Drug Targets 2011; 11:188-95. [PMID: 21470100 DOI: 10.2174/187152611795589717] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Accepted: 06/19/2010] [Indexed: 12/30/2022]
Abstract
AIMS Global figures clearly demonstrate inadequacy of current diabetes care: every 10 seconds one patient dies of diabetes-related pathologies. Nephropathy is the leading secondary complication of the disease. Nutritional supplement by chromium-picolinate is assumed to have beneficial therapeutic effects. However, potential toxic effects reported increase concerns about safety of chromium-picolinate. The experimental design aimed at determining, whether the treatment with clinically relevant doses of chromium-picolinate can harm through DNA damage and extensive alterations in central detoxification / cell-cycle regulating pathways in treatment of diabetes. METHODS Well-acknowledged animal model of db/db-mice and clinically relevant doses of chromium-picolinate were used. As an index of DNA-damage, measurement of DNA-breaks was performed using "Comet Assay"-analysis. Individual and group-specific expression patterns of SOD-1 and P53 were evaluated to give a clue about central detoxification and cell-cycle regulating pathways under treatment conditions. The study was performed in a double-blind manner. RESULTS Experimental data revealed highly individual reaction under treatment conditions. However, group-specific patterns were monitored: highest amount of damaged DNA--under the longest treatment with high doses, in contrast to groups with low doses of chromium-picolinate. Comet patterns were intermediate between untreated diabetised and control animals. Expression patterns demonstrated a correlation with subcellular imaging and dosage-dependent suppression under chromium-picolinate treatment. CONCLUSIONS This article highlights possible risks for individual long-term effects, when chromium-picolinate is used freely as a therapeutic nutritional modality agent without application of advanced diagnostic tools to predict risks and individual outcomes. Targeted measures require a creation of new guidelines for advanced Diabetes care.
Collapse
Affiliation(s)
- Kristina Yeghiazaryan
- Department of Radiology, Rheinische Friedrich-Wilhelms-University of Bonn, Sigmund-Freud-Strasse 25, Bonn, Germany
| | | | | | | | | |
Collapse
|
29
|
Szyguła R, Bunio A, Tubek S. The content of elements in rainwater and its relation to the frequency of hospitalization for chronic lymphocytic leukemia and chronic myeloid leukemia in Opole Voivodship, Poland, during 2000-2002. Biol Trace Elem Res 2011; 141:41-52. [PMID: 20455028 DOI: 10.1007/s12011-010-8717-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2010] [Accepted: 04/22/2010] [Indexed: 10/19/2022]
Abstract
Environmental factors play an essential role in the etiology of diseases of the hematopoietic system. Such factors include soil and water pollution and the presence of metals and toxic compounds in the air. Measuring the content of metallic elements in rainwater has become an accepted procedure for environmental pollution monitoring. In accordance with the above, it was decided to study relations between the content of selected elements in rainwater and hospitalization frequency due to chronic lymphocytic leukemia (CLL, C91 on ICD-10) and chronic myeloid leukemia (CML, C92 on ICD-10). It can be assumed that hospitalization frequency is a reliable indicator of exacerbations of these diseases. The annual average of hospitalizations due to a given disease during the years 2000-2002 was correlated with the annual average content of a given element in rainwater using the Spearman's correlation indicator to describe the relationship between the element content and the disease that is possibly a consequence of the element's presence in rainwater. In cases of CLL for all the subjected population and for men, no statistically significant correlations were found. For women, statistically significant correlations were found for chromium (r = 0.66), lead (r = 0.58), copper (r = 0.58), and cadmium (r = 0.51). For CML in all the studied population significant, negative correlations were found for magnesium (r = -0.6) and zinc (r = -0.52). In men, significant negative correlations were seen for magnesium (r = -0.69 and zinc (r = -0.55). No significant correlations were found in women. These results indicate the need of taking into account the environmental and gender factors in research connected with these diseases, which can be probably of help in improvements of therapy efficiency.
Collapse
Affiliation(s)
- Renata Szyguła
- Faculty of Physical Education and Physiotherapy, Institute of Technology, Opole, Poland
| | | | | |
Collapse
|
30
|
Sharma A, Shukla A, Mishra M, Chowdhuri DK. Validation and application of Drosophila melanogaster as an in vivo model for the detection of double strand breaks by neutral Comet assay. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2011; 721:142-6. [DOI: 10.1016/j.mrgentox.2011.01.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Revised: 01/05/2011] [Accepted: 01/16/2011] [Indexed: 10/18/2022]
|
31
|
Scientific Opinion on the safety of chromium picolinate as a source of chromium added for nutritional purposes to foodstuff for particular nutritional uses and to foods intended for the general population. EFSA J 2010. [DOI: 10.2903/j.efsa.2010.1883] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
|
32
|
Scientific Opinion on the safety of trivalent chromium as a nutrient added for nutritional purposes to foodstuffs for particular nutritional uses and foods intended for the general population (including food supplements). EFSA J 2010. [DOI: 10.2903/j.efsa.2010.1882] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
|
33
|
Chromium picolinate, zinc picolinate and zinc picolinate dihydrate added for nutritional purposes in food supplements. EFSA J 2009. [DOI: 10.2903/j.efsa.2009.1113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
|
34
|
Jana M, Rajaram A, Rajaram R. Chromium picolinate induced apoptosis of lymphocytes and the signaling mechanisms thereof. Toxicol Appl Pharmacol 2009; 237:331-44. [DOI: 10.1016/j.taap.2009.04.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2009] [Revised: 04/03/2009] [Accepted: 04/03/2009] [Indexed: 11/27/2022]
|
35
|
Evaluation of the DNA damaging effect of the heat-induced food toxicant 5-hydroxymethylfurfural (HMF) in various cell lines with different activities of sulfotransferases. Food Chem Toxicol 2009; 47:880-4. [DOI: 10.1016/j.fct.2009.01.022] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
36
|
Stout MD, Nyska A, Collins BJ, Witt KL, Kissling GE, Malarkey DE, Hooth MJ. Chronic toxicity and carcinogenicity studies of chromium picolinate monohydrate administered in feed to F344/N rats and B6C3F1 mice for 2 years. Food Chem Toxicol 2009; 47:729-33. [PMID: 19166900 PMCID: PMC2718538 DOI: 10.1016/j.fct.2009.01.006] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2008] [Revised: 12/09/2008] [Accepted: 01/04/2009] [Indexed: 10/21/2022]
Abstract
Trivalent chromium (Cr(III)) has been proposed to be an essential element, which may increase sensitivity to insulin and thus participate in carbohydrate and lipid metabolism. Humans ingest Cr(III) both as a natural dietary constituent and in dietary supplements taken for weight loss and antidiabetic effects. Chromium picolinate (CP), a widely used supplement, contains Cr(III) chelated with three molecules of picolinic acid and was formulated in an attempt to improve the absorption of Cr(III). In order to examine the potential for CP to induce chronic toxicity and carcinogenicity, the NTP conducted studies of the monohydrate form (CPM) in groups of 50 male and female F344/N rats and B6C3F1 mice exposed in feed to concentrations of 0, 2000, 10,000 or 50,000 ppm for 2 years; exposure concentrations were selected following review of the data from NTP 3-month toxicity studies. Exposure to CPM did not induce biologically significant changes in survival, body weight, feed consumption, or non-neoplastic lesions in rats or mice. In male rats, a statistically significant increase in the incidence of preputial gland adenoma at 10,000 ppm was considered an equivocal finding. CPM was not carcinogenic to female rats or to male or female mice.
Collapse
Affiliation(s)
- M D Stout
- National Toxicology Program, National Institute of Environmental Health Sciences, NIEHS, Research Triangle Park, NC 27709, USA.
| | | | | | | | | | | | | |
Collapse
|
37
|
Demma J, Hallberg K, Hellman B. Genotoxicity of plumbagin and its effects on catechol and NQNO-induced DNA damage in mouse lymphoma cells. Toxicol In Vitro 2009; 23:266-71. [DOI: 10.1016/j.tiv.2008.12.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2008] [Revised: 11/03/2008] [Accepted: 12/05/2008] [Indexed: 01/27/2023]
|
38
|
Tan GY, Bi JM, Zhang MH, Feng JH, Xie P, Zheng SS. Effects of chromium picolinate on oxidative damage in primary piglet hepatocytes. Biol Trace Elem Res 2008; 126 Suppl 1:S69-79. [PMID: 18802674 DOI: 10.1007/s12011-008-8216-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2008] [Accepted: 08/12/2008] [Indexed: 12/17/2022]
Abstract
Chromium picolinate is a popular nutritional supplement whose safety has been questioned because of the potential risk of oxidative DNA damage. To investigate this possibility, a dose-dependent study was performed in piglet hepatocyte cultures in which low (8 microM), medium (200 microM), and high (400 microM) doses of chromium picolinate were tested and compared to untreated controls. After 48 h incubation, there were no significant differences in the levels of intracellular reactive oxygen species, medium lactate dehydrogenase activity, and comet indicators between the three experimental groups and controls (p > 0.05). In the 8 microM-treated group, the intracellular malondialdehyde content was significantly decreased relative to controls (p < 0.05). All of the studied parameters showed a dose-dependent increase that was statistically significant between the low and high doses (p < 0.05). These results suggest that: (1) chromium picolinate may affect the oxidative status of piglet hepatocytes; (2) the appropriate dose (approximately physiological concentration) of chromium picolinate can inhibit lipid peroxidation, and (3) high doses of chromium picolinate have no significant effects on oxidative damage in piglet hepatocytes, but the existing evidence also imply that exposure to a higher dose appears to be unwarranted.
Collapse
Affiliation(s)
- Gao-Yi Tan
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, People's Republic of China
| | | | | | | | | | | |
Collapse
|
39
|
Eastmond DA, MacGregor JT, Slesinski RS. Trivalent Chromium: Assessing the Genotoxic Risk of an Essential Trace Element and Widely Used Human and Animal Nutritional Supplement. Crit Rev Toxicol 2008; 38:173-90. [DOI: 10.1080/10408440701845401] [Citation(s) in RCA: 164] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
40
|
Nguyen A, Mulyani I, Levina A, Lay PA. Reactivity of Chromium(III) Nutritional Supplements in Biological Media: An X-Ray Absorption Spectroscopic Study. Inorg Chem 2008; 47:4299-309. [DOI: 10.1021/ic7024389] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Annie Nguyen
- School of Chemistry, The University of Sydney, NSW, 2006, Australia
| | - Irma Mulyani
- School of Chemistry, The University of Sydney, NSW, 2006, Australia
| | - Aviva Levina
- School of Chemistry, The University of Sydney, NSW, 2006, Australia
| | - Peter A. Lay
- School of Chemistry, The University of Sydney, NSW, 2006, Australia
| |
Collapse
|
41
|
Levina A, Lay PA. Chemical properties and toxicity of chromium(III) nutritional supplements. Chem Res Toxicol 2008; 21:563-71. [PMID: 18237145 DOI: 10.1021/tx700385t] [Citation(s) in RCA: 160] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The status of Cr(III) as an essential micronutrient for humans is currently under question. No functional Cr(III)-containing biomolecules have been definitively described as yet, and accumulated experience in the use of Cr(III) nutritional supplements (such as [Cr(pic) 3], where pic = 2-pyridinecarboxylato) has shown no measurable benefits for nondiabetic people. Although the use of large doses of Cr(III) supplements may lead to improvements in glucose metabolism for type 2 diabetics, there is a growing concern over the possible genotoxicity of these compounds, particularly of [Cr(pic) 3]. The current perspective discusses chemical transformations of Cr(III) nutritional supplements in biological media, with implications for both beneficial and toxic actions of Cr(III) complexes, which are likely to arise from the same biochemical mechanisms, dependent on concentrations of the reactive species. These species include: (i) partial hydrolysis products of Cr(III) nutritional supplements, which are capable of binding to biological macromolecules and altering their functions; and (ii) highly reactive Cr(VI/V/IV) species and organic radicals, formed in reactions of Cr(III) with biological oxidants. Low concentrations of these species are likely to cause alterations in cell signaling (including enhancement of insulin signaling) through interactions with the active centers of regulatory enzymes in the cell membrane or in the cytoplasm, while higher concentrations are likely to produce genotoxic DNA lesions in the cell nucleus. These data suggest that the potential for genotoxic side-effects of Cr(III) complexes may outweigh their possible benefits as insulin enhancers, and that recommendations for their use as either nutritional supplements or antidiabetic drugs need to be reconsidered in light of these recent findings.
Collapse
|
42
|
Tan GY, Zheng SS, Zhang MH, Feng JH, Xie P, Bi JM. Study of oxidative damage in growing-finishing pigs with continuous excess dietary chromium picolinate intake. Biol Trace Elem Res 2008; 126:129-40. [PMID: 18704273 DOI: 10.1007/s12011-008-8207-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2008] [Accepted: 07/21/2008] [Indexed: 10/21/2022]
Abstract
Chromium picolinate (CrPic) is a popular nutritional supplement; however, its safety has been questioned as it may be a source of oxidative stress that induces genotoxicity. The current work investigated the effect of excessive CrPic intake on oxidative damage in growing-finishing pigs. Thirty castrated male pigs, weighing approximately 30 kg each, were randomly divided into five groups and fed a diet with 0, 200, 800, 1,600, 3,200 microg of Cr/kg feed as CrPic for 80 days (approximately the entire growing-finishing period). High CrPic dose significantly decreased superoxide dismutase activity in serum at 80 days as well as the catalase activity in kidney (p < 0.05); however, compared to controls, malondialdehyde in tissue and serum, urinary 8-hydroxydeoxyguanosine level, and DNA strand breaks in liver and kidney had no notable differences (p > 0.05). These results suggested that long-term exposure to different doses of CrPic in feed did not increase the formation of biomarkers of oxidative damage in growing-finishing pigs. However, taking into account the changes of antioxidant enzymes activity, excessive dietary CrPic intake was not recommended in this study.
Collapse
Affiliation(s)
- Gao-Yi Tan
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100094, People's Republic of China
| | | | | | | | | | | |
Collapse
|
43
|
Gaudin J, Huet S, Jarry G, Fessard V. In vivo DNA damage induced by the cyanotoxin microcystin-LR: comparison of intra-peritoneal and oral administrations by use of the comet assay. Mutat Res 2007; 652:65-71. [PMID: 18282792 DOI: 10.1016/j.mrgentox.2007.10.024] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2006] [Revised: 05/10/2007] [Accepted: 10/15/2007] [Indexed: 12/13/2022]
Abstract
Microcystin-LR (MC-LR), involved in human and animal poisonings by cyanobacteria, has been shown to be both a potent tumour promoter in rat liver and an inhibitor of serine/threonine protein phosphatases, specifically PP1 and PP2A. The research on the genotoxic potential of MC-LR counts only few in vivo studies. In order to determine the target organs for DNA-damage induction by MC-LR, the single-cell gel electrophoresis (SCGE) or comet assay was performed in mice. Following a single oral administration of 2 and 4mg/kg bw of MC-LR, a statistically significant induction of DNA damage in blood cells was obtained after 3h. However, after an intra-peritoneal injection (ip), DNA lesions were mainly induced in the liver, but were also reported in the kidney, the intestine and the colon. The sensitivity of the ip route compared to the oral route suggested a difference in the bio-disponibility of the toxin. In any case, DNA damage was induced by MC-LR irrespective of the administration route. Among the target organs, the DNA damage induced in the intestinal tissues (ileum and colon) may contribute to an increased cancer risk.
Collapse
Affiliation(s)
- Julien Gaudin
- Agence Française de Sécurité Sanitaire des Aliments, Laboratoire d'Etudes et de Recherches sur les Médicaments Vétérinaires et les Désinfectants, Unité de Toxicologie Génétique des Contaminants Alimentaires, Fougères, France.
| | | | | | | |
Collapse
|
44
|
Andersson MA, Hellman BE. Evaluation of catechol-induced DNA damage in human lymphocytes: A comparison between freshly isolated lymphocytes and T-lymphocytes from extended-term cultures. Toxicol In Vitro 2007; 21:716-22. [PMID: 17303373 DOI: 10.1016/j.tiv.2006.12.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2006] [Revised: 12/11/2006] [Accepted: 12/20/2006] [Indexed: 12/01/2022]
Abstract
Extended-term cultures of proliferating human T-lymphocytes (ETC) may be a practical alternative to freshly isolated non-proliferating peripheral blood lymphocytes (PBL) when studying genotoxicity in vitro. To investigate if the pattern of DNA damage differs between the two in vitro systems, catechol-induced DNA damage was evaluated in PBL and ETC derived from the same blood sample, using three different donors. DNA damage was monitored using the comet assay. Whereas 3 h of exposure to 0.5 mM catechol was found to be without DNA damaging effects, 3 mM was found to induce significant damage both in the PBL and the ETC (the latter being clearly less sensitive). The level of reactive oxygen species (ROS) was also measured in the ETC using the fluorescent probe carboxy-H2DCFA. ROS was found to be considerably increased both at 0.5 and 3 mM catechol. The demonstrated difference in sensitivity towards catechol-induced DNA damage between PBL and ETC may be due to their different proliferative status, but despite this difference both in vitro systems were able to identify catechol as a DNA damaging agent at the same concentration.
Collapse
Affiliation(s)
- Maria A Andersson
- Department of Pharmaceutical Biosciences, Division of Toxicology, BMC, SE-751 24 Uppsala, Sweden
| | | |
Collapse
|