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Szczygieł D, Szczygieł M, Łaś A, Elas M, Zuziak R, Płonka BK, Płonka PM. Spin Trapping of Nitric Oxide by Hemoglobin and Ferrous Diethyldithiocarbamate in Model Tumors Differing in Vascularization. Int J Mol Sci 2024; 25:4172. [PMID: 38673758 PMCID: PMC11049848 DOI: 10.3390/ijms25084172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 03/16/2024] [Accepted: 03/18/2024] [Indexed: 04/28/2024] Open
Abstract
Animal tumors serve as reasonable models for human cancers. Both human and animal tumors often reveal triplet EPR signals of nitrosylhemoglobin (HbNO) as an effect of nitric oxide formation in tumor tissue, where NO is complexed by Hb. In search of factors determining the appearance of nitrosylhemoglobin (HbNO) in solid tumors, we compared the intensities of electron paramagnetic resonance (EPR) signals of various iron-nitrosyl complexes detectable in tumor tissues, in the presence and absence of excess exogenous iron(II) and diethyldithiocarbamate (DETC). Three types of murine tumors, namely, L5178Y lymphoma, amelanotic Cloudman S91 melanoma, and Ehrlich carcinoma (EC) growing in DBA/2 or Swiss mice, were used. The results were analyzed in the context of vascularization determined histochemically using antibodies to CD31. Strong HbNO EPR signals were found in melanoma, i.e., in the tumor with a vast amount of a hemorrhagic necrosis core. Strong Fe(DETC)2NO signals could be induced in poorly vascularized EC. In L5178Y, there was a correlation between both types of signals, and in addition, Fe(RS)2(NO)2 signals of non-heme iron-nitrosyl complexes could be detected. We postulate that HbNO EPR signals appear during active destruction of well-vascularized tumor tissue due to hemorrhagic necrosis. The presence of iron-nitrosyl complexes in tumor tissue is biologically meaningful and defines the evolution of complicated tumor-host interactions.
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Affiliation(s)
- Dariusz Szczygieł
- Department of Biophysics and Cancer Biology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 31-007 Krakow, Poland; (D.S.); (M.S.); (A.Ł.); (M.E.); (R.Z.); (B.K.P.)
| | - Małgorzata Szczygieł
- Department of Biophysics and Cancer Biology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 31-007 Krakow, Poland; (D.S.); (M.S.); (A.Ł.); (M.E.); (R.Z.); (B.K.P.)
| | - Anna Łaś
- Department of Biophysics and Cancer Biology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 31-007 Krakow, Poland; (D.S.); (M.S.); (A.Ł.); (M.E.); (R.Z.); (B.K.P.)
| | - Martyna Elas
- Department of Biophysics and Cancer Biology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 31-007 Krakow, Poland; (D.S.); (M.S.); (A.Ł.); (M.E.); (R.Z.); (B.K.P.)
| | - Roxana Zuziak
- Department of Biophysics and Cancer Biology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 31-007 Krakow, Poland; (D.S.); (M.S.); (A.Ł.); (M.E.); (R.Z.); (B.K.P.)
- Department of Chemistry and Biochemistry, Institute for Basic Sciences, University of Physical Education, 31-571 Krakow, Poland
| | - Beata K. Płonka
- Department of Biophysics and Cancer Biology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 31-007 Krakow, Poland; (D.S.); (M.S.); (A.Ł.); (M.E.); (R.Z.); (B.K.P.)
| | - Przemysław M. Płonka
- Department of Biophysics and Cancer Biology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 31-007 Krakow, Poland; (D.S.); (M.S.); (A.Ł.); (M.E.); (R.Z.); (B.K.P.)
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Sun Q, Cui X, Wang Y, Zhang P, Lu W. Comparison Studies on Several Ligands Used in Determination of Cd(II) in Rice by Flame Atomic Absorption Spectrometry after Ultrasound-Assisted Dispersive Liquid-Liquid Microextraction. Molecules 2022; 27:molecules27030590. [PMID: 35163864 PMCID: PMC8838845 DOI: 10.3390/molecules27030590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/01/2022] [Accepted: 01/13/2022] [Indexed: 11/30/2022]
Abstract
Ligands plays an important role in the extraction procedures for the determination of cadmium in rice samples by using flame atomic absorption spectrometry (FAAS). In the present study, comparative evaluation of 10 commercially available ligands for formation of Cd(II)-ligand complex and determination of cadmium in rice samples by ultrasound-assisted dispersive liquid–liquid microextraction (UADLLME) combined with FAAS was developed. Sodium diethyldithiocarbamate (DDTC) provided a high distribution coefficient as well as a good absorbance signal, therefore DDTC was used as a ligand in UADLLME. A low density and less toxic solvent, 1-heptanol, was used as the extraction solvent and ethanol was used as the disperser solvent. In addition, the experimental conditions of UADLLME were optimized in standard solution first and then applied in rice, such as the type and volume of extractant and dispersant, pH, extraction time, and temperature. Under the optimal experimental conditions, the detection limit (3σ) was 0.69 μg/L for Cd(II). The proposed method was applied for the determination of Cd(II) in three different rice samples (polished rice, brown rice, and glutinous rice), the recovery test was carried out, and the results ranged between 96.7 to 113.6%. The proposed method has the advantages of simplicity, low cost, and accurate and was successfully applied to analyze Cd(II) in rice.
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Meng Z, Wang H, Fang X, Liu Z, Yang Z, Yong J, Yang Q, Bai Y, Ren H, Xu H, Li X. Surface Decoration via Physical Interaction of Cupric Diethyldithiocarbamate Nanocrystals and Its Impact on Biodistribution and Tumor Targeting. ACS Appl Mater Interfaces 2021; 13:36894-36908. [PMID: 34328715 DOI: 10.1021/acsami.1c09346] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The vascular wall is the first physiologic barrier that circulating nanoparticles (NPs) encounter, which also is a key biological barrier to cancer drug delivery. NPs can continually scavenge the endothelium for biomarkers of cancer, and the chance of NPs' extravasation into the tumors can be enhanced. Here, we envision P-selectin as a target for specific delivery of drug nanocrystals to tumors. The cupric diethyldithiocarbamate nanocrystals (CuET NCs) were first prepared by an antisolvent method, and then nanocrystals were coated with fucoidan via physical interaction. The fucoidan-coated CuET nanocrystals (CuET@Fuc) possess high drug loading and have the ability to interact with human umbilical vein endothelial cells expressing P-selectin, which transiently enhances the endothelial permeability and facilitates CuET@Fuc extravasation from the peritumoral vascular to achieve higher tumor accumulation of drugs than bare CuET NCs. The CuET NC shows poorer anticancer efficacy than CuET@Fuc at the same dose of CuET. Upon repeated dosing of CuET@Fuc for 2 weeks, no mortality was observed in treated melanoma-bearing mice, while the mortality in the control group and excipient-treated groups reached 23%. The growth rate of melanoma in the CuET@Fuc-treated group was significantly lower than those in other groups. Furthermore, an acute toxicity study revealed that CuET@Fuc is a safe formulation for cancer treatment.
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Affiliation(s)
- Zhengjie Meng
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Hao Wang
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
| | - Xue Fang
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
| | - Zhangya Liu
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
| | - Zheng Yang
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
| | - Jiahui Yong
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
| | - Qingqing Yang
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
| | - Yunhao Bai
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
| | - Hao Ren
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
| | - Hao Xu
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Xueming Li
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
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Chan PF, Ang KP, Hamid RA. A bismuth diethyldithiocarbamate compound induced apoptosis via mitochondria-dependent pathway and suppressed invasion in MCF-7 breast cancer cells. Biometals 2021; 34:365-391. [PMID: 33555494 DOI: 10.1007/s10534-021-00286-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 01/13/2021] [Indexed: 12/29/2022]
Abstract
Interest in bismuth(III) dithiocarbamate complexes as potential drug candidates is increasing due to their low toxicity compared to other group 15 elements (pnictogen) of the periodic table. Bismuth dithiocarbamate compounds have been reported to induce greater cytotoxicity in various human carcinoma cancer cell lines. Using various in vitro cancer-related assays, we investigated the antiproliferative activity of bismuth diethyldithiocarbamate, denoted as 1, against the MCF-7 human breast adenocarcinoma cell line and the effect on genes that may be involved in antiproliferation, apoptosis, DNA fragmentation, invasion and polyubiquitination functions. In general, 1 exhibited high cytotoxicity in MCF-7 cells, with an IC50 of 1.26 ± 0.02 µM, by inducing the intrinsic apoptotic pathway, as ascertained by measurements of intracellular reactive oxygen species (ROS), caspase activity, the amount of cytochrome c released and the extent of DNA fragmentation and by staining assays that reveal apoptotic cells. In addition, 1 significantly attenuated cell invasion and modulated several cancer-related genes, including PLK2, FIGF, FLT4, PARP4, and HDAC11, as determined via gene expression analysis. The NF-κB signaling pathway was inhibited by 1 upon the activation of Lys48- and Lys63-linked polyubiquitination, thus leading to its degradation via the proteasome. Overall, 1 has the potential to act as an antiproliferative agent and a proteasome inhibitor in estrogen-positive breast cancer.
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Affiliation(s)
- Pit Foong Chan
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - Kok Pian Ang
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - Roslida Abd Hamid
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia.
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Pan M, Zheng Q, Yu Y, Ai H, Xie Y, Zeng X, Wang C, Liu L, Zhao M. Seesaw conformations of Npl4 in the human p97 complex and the inhibitory mechanism of a disulfiram derivative. Nat Commun 2021; 12:121. [PMID: 33402676 PMCID: PMC7785736 DOI: 10.1038/s41467-020-20359-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 11/25/2020] [Indexed: 01/29/2023] Open
Abstract
p97, also known as valosin-containing protein (VCP) or Cdc48, plays a central role in cellular protein homeostasis. Human p97 mutations are associated with several neurodegenerative diseases. Targeting p97 and its cofactors is a strategy for cancer drug development. Despite significant structural insights into the fungal homolog Cdc48, little is known about how human p97 interacts with its cofactors. Recently, the anti-alcohol abuse drug disulfiram was found to target cancer through Npl4, a cofactor of p97, but the molecular mechanism remains elusive. Here, using single-particle cryo-electron microscopy (cryo-EM), we uncovered three Npl4 conformational states in complex with human p97 before ATP hydrolysis. The motion of Npl4 results from its zinc finger motifs interacting with the N domain of p97, which is essential for the unfolding activity of p97. In vitro and cell-based assays showed that the disulfiram derivative bis-(diethyldithiocarbamate)-copper (CuET) can bypass the copper transporter system and inhibit the function of p97 in the cytoplasm by releasing cupric ions under oxidative conditions, which disrupt the zinc finger motifs of Npl4, locking the essential conformational switch of the complex.
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Affiliation(s)
- Man Pan
- Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL, 60637, USA
| | - Qingyun Zheng
- Tsinghua-Peking Center for Life Sciences, Department of Chemistry, Tsinghua University, 100084, Beijing, China
| | - Yuanyuan Yu
- Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL, 60637, USA
| | - Huasong Ai
- Tsinghua-Peking Center for Life Sciences, Department of Chemistry, Tsinghua University, 100084, Beijing, China
| | - Yuan Xie
- Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL, 60637, USA
| | - Xin Zeng
- Peking-Tsinghua Center for Life Sciences, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China
| | - Chu Wang
- Peking-Tsinghua Center for Life Sciences, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China
| | - Lei Liu
- Tsinghua-Peking Center for Life Sciences, Department of Chemistry, Tsinghua University, 100084, Beijing, China.
| | - Minglei Zhao
- Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL, 60637, USA.
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Tang HX, Liu CG, Zhang JT, Zheng X, Yang DY, Kankala RK, Wang SB, Chen AZ. Biodegradable Quantum Composites for Synergistic Photothermal Therapy and Copper-Enhanced Chemotherapy. ACS Appl Mater Interfaces 2020; 12:47289-47298. [PMID: 32975929 DOI: 10.1021/acsami.0c14636] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In recent times, the combination therapy has garnered enormous interest owing to its great potential in clinical research. It has been reported that disulfiram, a clinical antialcoholism drug, could be degraded to diethyldithiocarbamate (DDTC) in vivo and subsequently result in the copper-DDTC complex (Cu(DDTC)2) toward ablating cancer cells. In addition, the ultrasmall copper sulfide nanodots (CuS NDs) have shown great potential in cancer treatment because of their excellent photothermal and photodynamic therapeutic efficiencies. Herein, by taking advantage of the interactions between CuS and DDTC, a new multifunctional nanoplatform based on DDTC-loaded CuS (CuS-DDTC) NDs is successfully fabricated, leading to the achievement of the synergistic effect of photothermal and copper enhanced chemotherapy. All experimental results verified promising synergistic therapeutic effects. Moreover, in vivo biocompatibility and metabolism experiments displayed that the CuS-DDTC NDs could be quickly excreted from the body with no apparent toxicity signs. Together, our findings indicated the superior synergistic therapeutic effect of photothermal and copper-enhanced chemotherapy, providing a promising anticancer strategy based on the CuS-DDTC NDs drug delivery system.
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Affiliation(s)
| | | | | | | | - Da-Yun Yang
- Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350108, P. R. China
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Del Prete S, De Luca V, Nocentini A, Scaloni A, Mastrolorenzo MD, Supuran CT, Capasso C. Anion Inhibition Studies of the Beta-Carbonic Anhydrase from Escherichia coli. Molecules 2020; 25:E2564. [PMID: 32486444 PMCID: PMC7321114 DOI: 10.3390/molecules25112564] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 05/25/2020] [Accepted: 05/28/2020] [Indexed: 12/15/2022] Open
Abstract
The interconversion of CO2 and HCO3- is catalyzed by a superfamily of metalloenzymes, known as carbonic anhydrases (CAs, EC 4.2.1.1), which maintain the equilibrium between dissolved inorganic CO2 and HCO3-. In the genome of Escherichia coli, a Gram-negative bacterium typically colonizing the lower intestine of warm-blooded organisms, the cyn operon gene includes the CynT gene, encoding for a β-CA, and CynS gene, encoding for the cyanase. CynT (β-CA) prevents the depletion of the cellular bicarbonate, which is further used in the reaction catalyzed by cyanase. A second β-CA (CynT2 or Can or yadF), as well as a γ and ι-CAs were also identified in the E. coli genome. CynT2 is essential for bacterial growth at atmospheric CO2 concentration. Here, we characterized the kinetic properties and the anion inhibition profiles of recombinant CynT2. The enzyme showed a good activity for the physiological CO2 hydratase reaction with the following parameters: kcat = 5.3 × 105 s-1 and kcat/KM = of 4.1 × 107 M-1 s-1. Sulfamide, sulfamate, phenylboronic acid, phenylarsonic acid, and diethyldithiocarbamate were the most effective CynT2 inhibitors (KI = 2.5 to 84 µM). The anions allowed for a detailed understanding of the interaction of inhibitors with the amino acid residues surrounding the catalytic pocket of the enzyme and may be used as leads for the design of more efficient and specific inhibitors.
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Affiliation(s)
- Sonia Del Prete
- Institute of Biosciences and Bioresources, CNR, Via Pietro Castellino 111, 80131 Napoli, Italy; (S.D.P.); (V.D.L.)
| | - Viviana De Luca
- Institute of Biosciences and Bioresources, CNR, Via Pietro Castellino 111, 80131 Napoli, Italy; (S.D.P.); (V.D.L.)
- Proteomics & Mass Spectrometry Laboratory, ISPAAM, CNR, Via Argine 1085, 80147 Naples, Italy,
| | - Alessio Nocentini
- Department of Neurofarba, Section of Pharmaceutical and Nutraceutical Sciences, University of Florence, Via U. Schiff 6, Sesto Fiorentino, 50019 Florence, Italy; (A.N.); (M.D.M.)
| | - Andrea Scaloni
- Proteomics & Mass Spectrometry Laboratory, ISPAAM, CNR, Via Argine 1085, 80147 Naples, Italy,
| | - Margaret D. Mastrolorenzo
- Department of Neurofarba, Section of Pharmaceutical and Nutraceutical Sciences, University of Florence, Via U. Schiff 6, Sesto Fiorentino, 50019 Florence, Italy; (A.N.); (M.D.M.)
- University of California, San Diego (UCSD), 3425 Lebon Drive, Unit 918, San Diego, CA 92122, USA
| | - Claudiu T. Supuran
- Department of Neurofarba, Section of Pharmaceutical and Nutraceutical Sciences, University of Florence, Via U. Schiff 6, Sesto Fiorentino, 50019 Florence, Italy; (A.N.); (M.D.M.)
| | - Clemente Capasso
- Institute of Biosciences and Bioresources, CNR, Via Pietro Castellino 111, 80131 Napoli, Italy; (S.D.P.); (V.D.L.)
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Ishii H, Yamasaki T, Yui J, Zhang Y, Hanyu M, Ogawa M, Nengaki N, Tsuji AB, Terashima Y, Matsushima K, Zhang MR. Radiosynthesis of [thiocarbonyl- 11C]disulfiram and its first PET study in mice. Bioorg Med Chem Lett 2020; 30:126998. [PMID: 32014383 DOI: 10.1016/j.bmcl.2020.126998] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 01/15/2020] [Accepted: 01/24/2020] [Indexed: 11/29/2022]
Abstract
[Thiocarbonyl-11C]disulfiram ([11C]DSF) was synthesized via iodine oxidation of [11C]diethylcarbamodithioic acid ([11C]DETC), which was prepared from [11C]carbon disulfide and diethylamine. The decay-corrected isolated radiochemical yield (RCY) of [11C]DSF was greatly affected by the addition of unlabeled carbon disulfide. In the presence of carbon disulfide, the RCY was increased up to 22% with low molar activity (Am, 0.27 GBq/μmol). On the other hand, [11C]DSF was obtained in 0.4% RCY with a high Am value (95 GBq/μmol) in the absence of carbon disulfide. The radiochemical purity of [11C]DSF was always >98%. The first PET study on [11C]DSF was performed in mice. A high uptake of radioactivity was observed in the liver, kidneys, and gallbladder. The uptake level and distribution pattern in mice were not significantly affected by the Am value of the [11C]DSF sample used. In vivo metabolite analysis showed the rapid decomposition of [11C]DSF in mouse plasma.
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Affiliation(s)
- Hideki Ishii
- Department of Advanced Nuclear Medicine Sciences, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan.
| | - Tomoteru Yamasaki
- Department of Advanced Nuclear Medicine Sciences, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - Joji Yui
- Department of Advanced Nuclear Medicine Sciences, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - Yiding Zhang
- Department of Advanced Nuclear Medicine Sciences, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - Masayuki Hanyu
- Department of Advanced Nuclear Medicine Sciences, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - Masanao Ogawa
- Department of Advanced Nuclear Medicine Sciences, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - Nobuki Nengaki
- Department of Advanced Nuclear Medicine Sciences, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - Atsushi B Tsuji
- Department of Molecular Imaging and Theranostics, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - Yuya Terashima
- Division of Molecular Regulation of Inflammatory and Immune Diseases, Research Institute for Biomedical Science (RIBS), Tokyo University of Science, Chiba 278-0022, Japan
| | - Kouji Matsushima
- Division of Molecular Regulation of Inflammatory and Immune Diseases, Research Institute for Biomedical Science (RIBS), Tokyo University of Science, Chiba 278-0022, Japan
| | - Ming-Rong Zhang
- Department of Advanced Nuclear Medicine Sciences, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan.
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Xu Y, Kong Y, Xu J, Li X, Gou J, Yin T, He H, Zhang Y, Tang X. Doxorubicin intercalated copper diethyldithiocarbamate functionalized layered double hydroxide hybrid nanoparticles for targeted therapy of hepatocellular carcinoma. Biomater Sci 2020; 8:897-911. [PMID: 31825410 DOI: 10.1039/c9bm01394f] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Hepatocellular carcinoma (HCC) is one of the deadliest cancers due to its long incubation period and low cure rate. Layered double hydroxide (LDH) nanoparticles have attracted considerable research interest in the field of nanomedicine owing to their surface effects and good biocompatibility. In this research, we synthesized a hexagonal nanoparticle by the co-precipitation method, referred to as Cu-Al LDH. As an alternative to traditional drug-loading methods, sodium diethyldithiocarbamate (DDC) was introduced and combined with Cu2+ in LDHs to form a diethyldithiocarbamate-copper complex (Cu(DDC)2), which was not only the composition of carrier materials but also an effective component for cancer therapy. Doxorubicin (DOX) was also encapsulated into LDHs due to the clinical relevance of DOX treatment for HCC. Formulations of the Cu(DDC)2 and DOX co-loaded nanoparticles were optimized to precisely control the Cu(DDC)2/DOX ratio. The nanoparticles were coated with polyethylene glycol-graft-polyglutamic acid (PEG-PLG) through electrostatic adsorption to improve the stability of the nanoparticles. The outer layer was decorated with hyaluronic acid (HA) to achieve specific targeting of tumors. Compared with non-HA coated nanoparticles, HA coated nanoparticles showed greater cellular uptake in Hep G2 cells, which could cause higher cytotoxicity. In addition, targeted nanoparticles effectively inhibited tumor growth in mouse models of ectopic hepatocellular carcinoma. It can be concluded that there is a great potential for synergistic cancer therapy using the novel DOX intercalated Cu(DDC)2 functionalized layered double hydroxide hybrid nanoparticles.
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Affiliation(s)
- Ying Xu
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China.
| | - Yihan Kong
- Tianjin Pharmaceutical Research Institute Co., Ltd, Tianjin 300110, China
| | - Jiawen Xu
- Fuwai Hospital, Chinese Academy of Medical Sciences, Shenzhen 518000, China
| | - Xiaowen Li
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China.
| | - Jingxin Gou
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China.
| | - Tian Yin
- Department of Functional Food and Wine, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Haibing He
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China.
| | - Yu Zhang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China.
| | - Xing Tang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China.
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Cho HY, Mavi A, Chueng STD, Pongkulapa T, Pasquale N, Rabie H, Han J, Kim JH, Kim TH, Choi JW, Lee KB. Tumor Homing Reactive Oxygen Species Nanoparticle for Enhanced Cancer Therapy. ACS Appl Mater Interfaces 2019; 11:23909-23918. [PMID: 31252451 DOI: 10.1021/acsami.9b07483] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Multifunctional nanoparticles that carry chemotherapeutic agents can be innovative anticancer therapeutic options owing to their tumor-targeting ability and high drug-loading capacity. However, the nonspecific release of toxic DNA-intercalating anticancer drugs from the nanoparticles has significant side effects on healthy cells surrounding the tumors. Herein, we report a tumor homing reactive oxygen species nanoparticle (THoR-NP) platform that is highly effective and selective for ablating malignant tumors. Sodium nitroprusside (SNP) and diethyldithiocarbamate (DDC) were selected as an exogenous reactive oxygen species (ROS) generator and a superoxide dismutase 1 inhibitor, respectively. DDC-loaded THoR-NP, in combination with SNP treatment, eliminated multiple cancer cell lines effectively by the generation of peroxynitrite in the cells (>95% cell death), as compared to control drug treatments of the same concentration of DDC or SNP alone (0% cell death). Moreover, the magnetic core (ZnFe2O4) of the THoR-NP can specifically ablate tumor cells (breast cancer cells) via magnetic hyperthermia, in conjunction with DDC, even in the absence of any exogenous RS supplements. Finally, by incorporating iRGD peptide moieties in the THoR-NP, integrin-enriched cancer cells (malignant tumors, MDA-MB-231) were effectively and selectively killed, as opposed to nonmetastatic tumors (MCF-7), as confirmed in a mouse xenograft model. Hence, our strategy of using nanoparticles embedded with ROS-scavenger-inhibitor with an exogenous ROS supplement is highly selective and effective cancer therapy.
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Affiliation(s)
- Hyeon-Yeol Cho
- Department of Chemistry and Chemical Biology , Rutgers, The State University of New Jersey , Piscataway , New Jersey 08854 , United States
- Department of Chemical & Biomolecular Engineering , Sogang University , Seoul 04107 , Republic of Korea
| | - Ahmet Mavi
- Department of Nanobiotechnology , Atatürk University , Erzurum 25030 , Turkey
| | - Sy-Tsong Dean Chueng
- Department of Chemistry and Chemical Biology , Rutgers, The State University of New Jersey , Piscataway , New Jersey 08854 , United States
| | - Thanapat Pongkulapa
- Department of Chemistry and Chemical Biology , Rutgers, The State University of New Jersey , Piscataway , New Jersey 08854 , United States
| | - Nicholas Pasquale
- Department of Chemistry and Chemical Biology , Rutgers, The State University of New Jersey , Piscataway , New Jersey 08854 , United States
| | - Hudifah Rabie
- Department of Chemistry and Chemical Biology , Rutgers, The State University of New Jersey , Piscataway , New Jersey 08854 , United States
| | - Jiyou Han
- Department of Biological Sciences, Laboratory of Stem Cell Research and Biotechnology , Hyupsung University , Hwasung-si 18330 , Republic of Korea
| | - Jong Hoon Kim
- Department of Biotechnology, Laboratory of Stem Cells and Tissue Regeneration, College of Life Sciences and Biotechnology , Korea University , Seoul 02841 , Republic of Korea
| | - Tae-Hyung Kim
- School of Integrative Engineering , Chung-Ang University , Seoul 06974 , Republic of Korea
| | - Jeong-Woo Choi
- Department of Chemical & Biomolecular Engineering , Sogang University , Seoul 04107 , Republic of Korea
| | - Ki-Bum Lee
- Department of Chemistry and Chemical Biology , Rutgers, The State University of New Jersey , Piscataway , New Jersey 08854 , United States
- Department of Life and Nanopharmaceutical Science, College of Pharmacy , Kyung Hee University , Seoul 02447 , Republic of Korea
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11
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Kaewprom C, Sricharoen P, Limchoowong N, Nuengmatcha P, Chanthai S. Resonance light scattering sensor of the metal complex nanoparticles using diethyl dithiocarbamate doped graphene quantum dots for highly Pb(II)-sensitive detection in water sample. Spectrochim Acta A Mol Biomol Spectrosc 2019; 207:79-87. [PMID: 30199716 DOI: 10.1016/j.saa.2018.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 04/30/2018] [Accepted: 09/01/2018] [Indexed: 05/24/2023]
Abstract
This study was aimed to detect Pb2+ using diethyl dithiocarbamate-doped graphene quantum dots (DDTC-GQDs) based pyrolysis of citric acid. The excitation maximum wavelength (λmax, ex = 337 nm) of the DDTC-GQDs solution was blue shift from bare GQDs (λmax, ex = 365 nm), with the same emission maximum wavelength (λmax, em = 459 nm) indicating differences in the desired N, S matrices decorating in the nanoparticles. Their resonance light scattering intensities were peaked at the same λmax, ex/em = 551/553 nm without any background effect of both ionic strength and masking agent. Under optimal conditions, the linear range was 1.0-10.0 μg L-1 (R2 = 0.9899), limit of detection was 0.8 μg L-1 and limit of quantification was 1.5 μg L-1. The precision, expressed as the relative standard deviations, for intra-day and inter-day analyses was 0.87% and 4.47%, respectively. The recovery study of Pb2+ for real water samples was ranged between 80.8% and 109.5%. The proposed method was also proved with certified water sample containing 60 μg L-1 Pb2+ giving an excellent accuracy and was then implied satisfactorily for ultra-trace determination of Pb2+ in drinking water and tap water samples.
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Affiliation(s)
- Chayanee Kaewprom
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Phitchan Sricharoen
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Nunticha Limchoowong
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Prawit Nuengmatcha
- Nanomaterials Chemistry Research Unit, Department of Chemistry, Faculty of Science and Technology, Nakhon Si Thammarat Rajabhat University, Nakhon Si Thammarat 80280, Thailand
| | - Saksit Chanthai
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.
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12
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Solovieva ME, Shatalin YV, Solovyev VV, Sazonov AV, Kutyshenko VP, Akatov VS. Hydroxycobalamin catalyzes the oxidation of diethyldithiocarbamate and increases its cytotoxicity independently of copper ions. Redox Biol 2019; 20:28-37. [PMID: 30290302 PMCID: PMC6171330 DOI: 10.1016/j.redox.2018.09.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Revised: 09/14/2018] [Accepted: 09/24/2018] [Indexed: 01/04/2023] Open
Abstract
It is known that some metals (Cu, Zn, Cd, Au) markedly increase the toxic effect of thiocarbamates. It was shown in the present study that hydroxycobalamin (a form of vitamin B12, HOCbl), which incorporates cobalt, significantly enhances the cytotoxicity of diethyldithiocarbamate (DDC), decreasing its IC50 value in tumor cells three to five times. The addition of HOCbl to aqueous DDC solutions accelerated the reduction of oxygen. No hydrogen peroxide accumulation was observed in DDC + HOCbl solutions; however, catalase slowed down the oxygen reduction rate. Catalase as well as the antioxidants N-acetylcysteine (NAC) and glutathione (GSH) partially inhibited the cytotoxic effect of DDC + HOCbl, whereas ascorbate, pyruvate, and tiron, a scavenger of superoxide anion, had no cytoprotective effect. The administration of HOCbl into DDC solutions (> 1 mM) resulted in the formation of a crystalline precipitate, which was inhibited in the presence of GSH. The data of UV and NMR spectroscopy and HPLC and Mass Spectrometry (LC/MS) indicated that the main products of the reaction of DDC with HOCbl are disulfiram (DSF) and its oxidized forms, sulfones and sulfoxides. The increase in the cytotoxicity of DDC combined with HOCbl occurred both in the presence of Cu2+ in culture medium and in nominally Cu-free solutions, as well as in growth medium containing the copper chelator bathocuproine disulfonate (BCS). The results indicate that HOCbl accelerates the oxidation of DDC with the formation of DSF and its oxidized forms. Presumably, the main cause of the synergistic increase in the toxic effect of DDC + HOCbl is the formation of sulfones and sulfoxides of DSF.
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Affiliation(s)
- M E Solovieva
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region 142290 Russia
| | - Yu V Shatalin
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region 142290 Russia
| | | | | | - V P Kutyshenko
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region 142290 Russia
| | - V S Akatov
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region 142290 Russia.
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13
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Chen W, Yang W, Chen P, Huang Y, Li F. Disulfiram Copper Nanoparticles Prepared with a Stabilized Metal Ion Ligand Complex Method for Treating Drug-Resistant Prostate Cancers. ACS Appl Mater Interfaces 2018; 10:41118-41128. [PMID: 30444340 DOI: 10.1021/acsami.8b14940] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Disulfiram (DSF), an alcohol-aversion drug, has been explored for cancer treatment. Copper diethyldithiocarbamate (Cu(DDC)2) complex formed by DSF and copper ions is a major active ingredient for its anticancer activity. Direct administration of Cu(DDC)2 is a promising strategy to enhance the anticancer efficacy of DSF. However, efficient drug delivery remains a significant challenge for Cu(DDC)2 and hinders its clinical use. In this study, we developed a facile stabilized metal ion ligand complex (SMILE) method to prepare Cu(DDC)2 nanoparticles (NPs). The SMILE method could prepare Cu(DDC)2 NPs with different types of stabilizers including 1,2-distearoyl- sn-glycerol-3-phosphoethanolamine-poly(ethylene glycol) (PEG) 2000, d-α-tocopherol PEG 1000 succinate, methoxy PEG 5000- b-poly(l-lactide) 5000, and other generally recognized as safe excipients approved by the US Food and Drug Administration. The optimized formulations demonstrated excellent drug-loading efficiency (close to 100%), high drug concentrations (increased drug concentration by over 200-fold compared to the traditional micelle formulation), and an optimal particle size in the sub-100 nm range. Cu(DDC)2 NPs exhibited outstanding stability in serum for 72 h and can also be stored at room temperature for at least 1 month. The anticancer effects of Cu(DDC)2 NP formulations were determined by multiple assays including 3-(4,5-dimethyl-thiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay, colony-forming assay, calcein-AM/propidium iodide staining, and others. Cu(DDC)2 NPs showed excellent activity against drug-resistant prostate cancer cells and other cancer cells with a half-maximal inhibitory concentration (IC50) of around 100 nM. Our study also demonstrated that Cu(DDC)2 NPs induced cell death in drug-resistant prostate cancer cells (DU145-TXR) through paraptosis, which is a nonapoptotic cell death. To our best knowledge, the SMILE method provides, for the first time, a simple yet efficient process for generating Cu(DDC)2 NPs with high drug concentration, excellent loading efficiency, and desirable physicochemical properties. This method could potentially address drug delivery challenges of DSF/copper-based chemotherapy and facilitate its clinical translation.
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Affiliation(s)
| | | | | | - Yongzhuo Huang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica , Chinese Academy of Sciences , Shanghai 201203 , China
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14
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Kitamura H, Dahlan AV, Tian Y, Shimaoka T, Yamamoto T, Takahashi F. Impact of secondary generated minerals on toxic element immobilization for air pollution control fly ash of a municipal solid waste incinerator. Environ Sci Pollut Res Int 2018; 25:20700-20712. [PMID: 29754297 DOI: 10.1007/s11356-018-1959-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 04/04/2018] [Indexed: 06/08/2023]
Abstract
Impacts of secondary generated minerals on mineralogical and physical immobilization of toxic elements were investigated for chelate-treated air pollution control (APC) fly ash of a municipal solid waste incinerator. Scanning electron microscope (SEM) observation showed that ettringite was generated after the moistening treatment with/without chelate. Although ettringite can incorporate toxic elements into its structure, elemental analysis by energy dispersive X-ray could not find concentrated points of toxic elements in ettringite structure. This implies that mineralogical immobilization of toxic element by the encapsulation to ettringite structure seems to be limited. Physical immobilization was also investigated by SEM observation of the same APC fly ash particles before and after the moistening treatment. The transfer of soluble elements was inhibited only when insoluble minerals such as gypsum were generated and covered the surface of fly ash particles. Neoformed insoluble minerals prevented soluble elements from leaching and transfer. However, such physical immobilization seems to be limited because insoluble mineral formation with surface coverage was monitored only one time of more than 20 observations. Although uncertainty owing to limited samples with limited observations should be considered, this study concludes that mineralogical and physical immobilization of toxic elements by secondary minerals is limited although secondary minerals are always generated on the surface of APC fly ash particles during chelate treatment.
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Affiliation(s)
- Hiroki Kitamura
- Global Engineering Course for Development, Environment and Society, Department of Transdisciplinary Science and Engineering, School of Environment and Society, Tokyo Institute of Technology, G5-13, 4259, Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
- Research Fellow of Japan Society for the Promotion of Science, 5-3-1, Kojimachi, Chiyoda-ku, Tokyo, 102-0083, Japan
| | - Astryd Viandila Dahlan
- Global Engineering Course for Development, Environment and Society, Department of Transdisciplinary Science and Engineering, School of Environment and Society, Tokyo Institute of Technology, G5-13, 4259, Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Yu Tian
- Global Engineering Course for Development, Environment and Society, Department of Transdisciplinary Science and Engineering, School of Environment and Society, Tokyo Institute of Technology, G5-13, 4259, Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Takayuki Shimaoka
- Faculty of Urban and Environmental Engineering, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Takashi Yamamoto
- Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Fumitake Takahashi
- Global Engineering Course for Development, Environment and Society, Department of Transdisciplinary Science and Engineering, School of Environment and Society, Tokyo Institute of Technology, G5-13, 4259, Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan.
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15
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Zhang K, Dong R, Sun K, Wang X, Wang J, Yang CS, Zhang J. Synergistic toxicity of epigallocatechin-3-gallate and diethyldithiocarbamate, a lethal encounter involving redox-active copper. Free Radic Biol Med 2017; 113:143-156. [PMID: 28974447 DOI: 10.1016/j.freeradbiomed.2017.09.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 09/09/2017] [Accepted: 09/27/2017] [Indexed: 01/20/2023]
Abstract
Dithiocarbamates (DTC) are widely used in agricultural, industrial and therapeutic domains. There are ample opportunities for human exposure to DTC. Green tea extracts, with epigallocatechin-3-gallate (EGCG) being the most abundant constituent, have been used as dietary supplements for body weight reduction. Our hypothesis is that DTC can act as a copper ionophore to increase hepatic levels of redox-active copper which promotes EGCG auto-oxidation to produce oxidative stress and toxicity. The results of the present study in a mouse model is consistent with this hypothesis, showing that co-administration of EGCG and diethyldithiocarbamate - a metabolite of disulfiram (a drug for alcohol aversion therapy), both at tolerable levels, caused lethality. The liver was the major organ site of toxicity. The co-administration drastically increased lipid peroxidation, DNA damage and cell apoptosis as well as caused deleterious transcriptional responses including basal and Nrf2 antioxidant systems in the liver. The results suggest that exposure to DTC reduces toxic threshold of dietary polyphenols from green tea and possibly other plants, and vice versa. This novel hypothesis is important to human health, and the dose-response relationship of this synergistic toxicity needs to be further characterized.
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Affiliation(s)
- Ke Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, China
| | - Ruixia Dong
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, China
| | - Kang Sun
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, China
| | - Xiaoxiao Wang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, China
| | - Jiajia Wang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, China
| | - Chung S Yang
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA; International Joint Research Laboratory of Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, China
| | - Jinsong Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, China; International Joint Research Laboratory of Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, China.
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16
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Mazur DM, Polyakova OV, Artaev VB, Lebedev AT. Novel pollutants in the Moscow atmosphere in winter period: Gas chromatography-high resolution time-of-flight mass spectrometry study. Environ Pollut 2017; 222:242-250. [PMID: 28040339 DOI: 10.1016/j.envpol.2016.12.049] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 12/17/2016] [Accepted: 12/18/2016] [Indexed: 06/06/2023]
Abstract
The most common mass spectrometry approach analyzing contamination of the environment deals with targeted analysis, i.e. detection and quantification of the selected (priority) pollutants. However non-targeted analysis is becoming more often the method of choice for environmental chemists. It involves implementation of modern analytical instrumentation allowing for comprehensive detection and identification of the wide variety of compounds of the environmental interest present in the sample, such as pharmaceuticals and their metabolites, musks, nanomaterials, perfluorinated compounds, hormones, disinfection by-products, flame retardants, personal care products, and many others emerging contaminants. The paper presents the results of detection and identification of previously unreported organic compounds in snow samples collected in Moscow in March 2016. The snow analysis allows evaluation of long-term air pollution in the winter period. Gas chromatography coupled to a high resolution time-of-flight mass spectrometer has enabled us with capability to detect and identify such novel analytes as iodinated compounds, polychlorinated anisoles and even Ni-containing organic complex, which are unexpected in environmental samples. Some considerations concerning the possible sources of origin of these compounds in the environment are discussed.
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Affiliation(s)
- D M Mazur
- Lomonosov Moscow State University, Organic Chemistry Department, 119991 Moscow, Russia
| | - O V Polyakova
- Lomonosov Moscow State University, Organic Chemistry Department, 119991 Moscow, Russia
| | - V B Artaev
- LECO Corporation, 3000 Lakeview Avenue, St. Joseph, MI, USA
| | - A T Lebedev
- Lomonosov Moscow State University, Organic Chemistry Department, 119991 Moscow, Russia.
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17
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Gosav S, Paduraru N, Maftei D, Birsa ML, Praisler M. Quantum chemical study of a derivative of 3-substituted dithiocarbamic flavanone. Spectrochim Acta A Mol Biomol Spectrosc 2017; 172:115-125. [PMID: 27116950 DOI: 10.1016/j.saa.2016.04.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 03/22/2016] [Accepted: 04/08/2016] [Indexed: 06/05/2023]
Abstract
The aim of this work is to characterize a quite novel 3-dithiocarbamic flavonoid by vibrational spectroscopy in conjunction with Density Functional Theory (DFT) calculations. Quantum mechanics calculations of energies, geometries and vibrational wavenumbers in the ground state were carried out by using hybrid functional B3LYP with 6-311G(d,p) as basis set. The results indicate a remarkable agreement between the calculated molecular geometries, as well as vibrational frequencies, and the corresponding experimental data. In addition, a complete assignment of all the absorption bands present in the vibrational spectrum has been performed. In order to assess its chemical potential, quantum molecular descriptors characterizing the interactions between the 3-dithiocarbamic flavonoid and its biological receptors have been computed. The frontier molecular orbitals and the HOMO-LUMO energy gap have been used in order to explain the way in which the new molecule can interact with other species and to characterize its molecular chemical stability/reactivity. The molecular electrostatic potential (MEP) map, computed in order to identify the sites of the studied flavonoid that are most likely to interact with electrophilic and nucleophilic species, is discussed.
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Affiliation(s)
- Steluta Gosav
- "Dunarea de Jos" University, Department of Chemistry, Physics and Environment, Domneasca St. 47, 800008 Galati, Romania
| | - Nicoleta Paduraru
- "Dunarea de Jos" University, Department of Chemistry, Physics and Environment, Domneasca St. 47, 800008 Galati, Romania.
| | - Dan Maftei
- "Al.I. Cuza" University, Chemistry Department, 11 Carol I Blvd., RO-700506 Iasi, Romania
| | - Mihail Lucian Birsa
- "Al.I. Cuza" University, Chemistry Department, 11 Carol I Blvd., RO-700506 Iasi, Romania
| | - Mirela Praisler
- "Dunarea de Jos" University, Department of Chemistry, Physics and Environment, Domneasca St. 47, 800008 Galati, Romania
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18
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Mikoyan VD, Burgova EN, Borodulin RR, Vanin AF. The binuclear form of dinitrosyl iron complexes with thiol-containing ligands in animal tissues. Nitric Oxide 2016; 62:1-10. [PMID: 27989818 DOI: 10.1016/j.niox.2016.10.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 09/19/2016] [Accepted: 10/27/2016] [Indexed: 11/18/2022]
Abstract
It has been established that treatment of mice with sodium nitrite, S-nitrosoglutathione and the water-soluble nitroglycerine derivative isosorbide dinitrate (ISDN) as NO donors initiates in vivo synthesis of significant amounts of EPR-silent binuclear dinitrosyl iron complexes (B-DNIC) with thiol-containing ligands in the liver and other tissues of experimental mice. This effect is especially apparent if NO donors are administered to mice simultaneously with the Fe2+-citrate complex. Similar results were obtained in experiments on isolated liver and other mouse tissues treated with gaseous NО in vitro and during stimulation of endogenous NO synthesis in the presence of inducible NO synthase. B-DNIC appeared in mouse tissues after in vitro treatment of tissue samples with an aqueous solution of diethyldithiocarbamate (DETC), which resulted in the transfer of iron-mononitrosyl fragments from B-DNIC to the thiocarbonyl group of DETC and the formation of EPR-detectable mononitrosyl iron complexes (MNIC) with DETC. EPR-Active MNIC with N-methyl-d-glucamine dithiocarbamate (MGD) were synthesized in a similar way. MNIC-MGD were also formed in the reaction of water-soluble MGD-Fe2+ complexes with sodium nitrite, S-nitrosoglutathione and ISDN.
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Affiliation(s)
- Vasak D Mikoyan
- N.N.Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - Evgeniya N Burgova
- N.N.Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - Rostislav R Borodulin
- N.N.Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - Anatoly F Vanin
- N.N.Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia; Institute for Regenerative Medicine, I.M.Sechenov Moscow State Medical University, Moscow, Russia.
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19
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Wehbe M, Anantha M, Backstrom I, Leung A, Chen K, Malhotra A, Edwards K, Bally MB. Nanoscale Reaction Vessels Designed for Synthesis of Copper-Drug Complexes Suitable for Preclinical Development. PLoS One 2016; 11:e0153416. [PMID: 27055237 PMCID: PMC4824478 DOI: 10.1371/journal.pone.0153416] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 03/29/2016] [Indexed: 11/18/2022] Open
Abstract
The development of copper-drug complexes (CDCs) is hindered due to their very poor aqueous solubility. Diethyldithiocarbamate (DDC) is the primary metabolite of disulfiram, an approved drug for alcoholism that is being repurposed for cancer. The anticancer activity of DDC is dependent on complexation with copper to form copper bis-diethyldithiocarbamate (Cu(DDC)2), a highly insoluble complex that has not been possible to develop for indications requiring parenteral administration. We have resolved this issue by synthesizing Cu(DDC)2 inside liposomes. DDC crosses the liposomal lipid bilayer, reacting with the entrapped copper; a reaction that can be observed through a colour change as the solution goes from a light blue to dark brown. This method is successfully applied to other CDCs including the anti-parasitic drug clioquinol, the natural product quercetin and the novel targeted agent CX-5461. Our method provides a simple, transformative solution enabling, for the first time, the development of CDCs as viable candidate anticancer drugs; drugs that would represent a brand new class of therapeutics for cancer patients.
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Affiliation(s)
- Mohamed Wehbe
- Experimental Therapeutics, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada
- * E-mail:
| | - Malathi Anantha
- Experimental Therapeutics, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Ian Backstrom
- Experimental Therapeutics, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Ada Leung
- Experimental Therapeutics, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kent Chen
- Experimental Therapeutics, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Armaan Malhotra
- Experimental Therapeutics, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Katarina Edwards
- Department of Chemistry, University of Uppsala, 3 Husargatan (B7), Uppsala, Sweden
| | - Marcel B. Bally
- Experimental Therapeutics, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
- Center for Drug Research and Development, Vancouver, British Columbia, Canada
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Fujie T, Murakami M, Yoshida E, Tachinami T, Shinkai Y, Fujiwara Y, Yamamoto C, Kumagai Y, Naka H, Kaji T. Copper diethyldithiocarbamate as an activator of Nrf2 in cultured vascular endothelial cells. J Biol Inorg Chem 2016; 21:263-73. [PMID: 26825804 PMCID: PMC4801994 DOI: 10.1007/s00775-016-1337-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 01/08/2016] [Indexed: 12/21/2022]
Abstract
The interest in organic-inorganic hybrid molecules as molecular probes for biological systems has been growing rapidly. Such hybrid molecules exhibit unique biological activities. Herein, copper(II) bis(diethyldithiocarbamate) (Cu10) was found to activate the transcription factor NF-E2-related factor 2 (Nrf2), which is responsible for regulating antioxidant and phase II xenobiotic enzymes, in vascular endothelial cells. The copper complex rapidly accumulated within cells and induced nuclear translocation of Nrf2, leading to upregulation of the expression of downstream proteins without cytotoxic effects. However, while copper bis(2-hydroxyethyl)dithiocarbamate activated Nrf2, copper ion, diethyldithiocarbamate ligand with or without zinc or iron failed to exhibit this activity. Intracellular accumulation of Cu10 was higher than that of Cu(II) and Cu(I). While the accumulation of copper(II) bis(dimethyldithiocarbamate) was reduced by small interfering RNA (siRNA)-mediated knockdown of the copper transporter CTR1, the knockdown did not affect Cu10 accumulation, indicating that Cu10 rapidly enters vascular endothelial cells via CTR1-independent mechanisms. In addition, copper and iron complexes with other ligands tested could not activate Nrf2, suggesting that the intramolecular interaction between copper and dithiocarbamate ligand is important for the activation of the transcription factor. Cu10 induced the expression of heme oxygenase-1, NAD(P)H quinone oxidoreductase 1, and γ-glutamylcysteine synthetase, downstream proteins of Nrf2. It was suggested that Cu10-induced activation of Nrf2 was due to proteasome inhibition as well as binding to Kelch-like ECH-associated protein 1. Since the effects of Cu10 on vascular endothelial cells are unique and diverse, the copper complex may be a good molecular probe to analyze the functions of the cells.
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Affiliation(s)
- Tomoya Fujie
- Department of Environmental Health, Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, 278-8510, Japan
| | - Masaki Murakami
- Department of Environmental Health, Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, 278-8510, Japan
| | - Eiko Yoshida
- Department of Environmental Health, Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, 278-8510, Japan
| | - Tadashi Tachinami
- Graduate School of Science and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan
| | - Yasuhiro Shinkai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Japan
| | - Yasuyuki Fujiwara
- Department of Environmental Health, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, 192-0392, Japan
| | - Chika Yamamoto
- Department of Environmental Health, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, 274-8510, Japan
| | - Yoshito Kumagai
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Japan
| | - Hiroshi Naka
- Graduate School of Science and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan.
| | - Toshiyuki Kaji
- Department of Environmental Health, Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, 278-8510, Japan.
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Soto CAT, Costa AC, Versiane O, Lemma T, Machado NCF, Mondragón MA, Martin AA. Surface enhanced Raman scattering, natural bond orbitals and Mulliken atomic charge distribution in the normal modes of diethyldithiocarbamate cadmium (II) complex, [Cd(DDTC)₂]. Spectrochim Acta A Mol Biomol Spectrosc 2015; 146:192-203. [PMID: 25813176 DOI: 10.1016/j.saa.2015.02.059] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 02/10/2015] [Accepted: 02/16/2015] [Indexed: 06/04/2023]
Abstract
Theoretical and experimental bands have been assigned to the Fourier Transform Infrared (FT-IR) and FT-Raman spectra of the bis(diethyldithiocarbamate)Cd(II) complex, abbreviated as ([Cd(DDTC)2]). The calculations and spectral interpretation have been based on the DFT/B3LYP method, infrared and Raman second derivative spectra, and band deconvolution analysis to assist in the assignment of observed fundamentals. This study validated the unusual pseudo tetrahedral molecular structure formed around the Cd(II) cation. Surface-enhanced Raman scattering (SERS) was used to determine the interactions of the normal-modes of the diethyldithiocarbamate cadmium (II) complex on nano-structured silver surfaces. Natural bond orbital (NBO) analysis was also carried out to study the Cd(II) hybridization causing the pseudo tetrahedral geometry of the framework of the [Cd(DDTC)2] complex, and to confirm the charge transfer mechanisms through second order perturbation theory analysis of the Fox Matrix. In order to find out the electronic dispersion of the Mulliken atomic charges (MAC) in the normal modes, we calculated the MAC for each normal mode and correlated these values with the SERS effect. Experimental UV-Vis spectra were obtained and charge transfer bands were assigned. Good agreement between the calculated and experimental values for the vibrational and UV-Vis spectra was obtained.
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Affiliation(s)
- C A Téllez Soto
- Laboratory of Biomedical Vibrational Spectroscopy, IP&D, Research and Development Institute - UNIVAP, Av. Shishima Hifumi, 2911, Urbanova, 12.224-000 São José dos Campos, SP, Brazil.
| | - A C Costa
- Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro (IFRJ), Unidade de Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - O Versiane
- Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro (IFRJ), Unidade de Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - T Lemma
- Laboratory of Biomedical Vibrational Spectroscopy, IP&D, Research and Development Institute - UNIVAP, Av. Shishima Hifumi, 2911, Urbanova, 12.224-000 São José dos Campos, SP, Brazil
| | - N C F Machado
- Laboratory of Biomedical Vibrational Spectroscopy, IP&D, Research and Development Institute - UNIVAP, Av. Shishima Hifumi, 2911, Urbanova, 12.224-000 São José dos Campos, SP, Brazil
| | - M A Mondragón
- Centro de Física Aplicada y Tecnología Avanzada, Departamento de Nanotecnología, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, C.P. 76230, Querétaro, Qro, Mexico
| | - A A Martin
- Laboratory of Biomedical Vibrational Spectroscopy, IP&D, Research and Development Institute - UNIVAP, Av. Shishima Hifumi, 2911, Urbanova, 12.224-000 São José dos Campos, SP, Brazil
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Hashemniaye-Torshizi R, Ashraf N, Arbab-Zavar MH. Hydride generation coupled to microfunnel-assisted headspace liquid-phase microextraction for the determination of arsenic with UV-Vis spectrophotometry. Environ Monit Assess 2014; 186:8381-8389. [PMID: 25154684 DOI: 10.1007/s10661-014-4011-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Accepted: 08/15/2014] [Indexed: 06/03/2023]
Abstract
In this research, a microfunnel-assisted headspace liquid-phase microextraction technique has been used in combination with hydride generation to determine arsenic (As) by UV-Vis spectrophotometry. The method is based on the reduction of As to arsine (AsH3) in acidic media by sodium tetrahydroborate (NaBH4) followed by its subsequent reaction with silver diethyldithiocarbamate (AgDDC) to give an absorbing complex at 510 nm. The complexing reagent (AgDDC) has been dissolved in a 1:1 (by the volume ratio) mixture of chloroform/chlorobenzene microdroplet and exposed to the generated gaseous arsine via a reversed microfunnel in the headspace of the sample solution. Several operating parameters affecting the performance of the method have been examined and optimized. Acetonitrile solvent has been added to the working samples as a sensitivity enhancement agent. Under the optimized operating conditions, the detection limit has been measured to be 0.2 ng mL(-1) (based on 3sb/m criterion, n b = 8), and the calibration curve was linear in the range of 0.5-12 ng mL(-1). The relative standard deviation for eight replicate measurements was 1.9 %. Also, the effects of several potential interferences have been studied. The accuracy of the method was validated through the analysis of JR-1 geological standard reference material. The method has been successfully applied for the determination of arsenic in raw and spiked soft drink and water samples with the recoveries that ranged from 91 to 106 %.
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Meng L, Cheng J, Yang Y. Supramolecular solvent-based extraction coupled with vortex-mixing for determination of palladium and silver in water samples by flame atomic absorption spectrometry. Water Sci Technol 2014; 69:580-586. [PMID: 24552731 DOI: 10.2166/wst.2013.749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A simple and practical extraction method of supramolecular solvents (SUPRAS) was developed for separation and enrichment of trace amounts of palladium (Pd) and silver (Ag) in water samples prior to flame atomic absorption spectrometry (FAAS) analysis. The SUPRAS selected was made up of an aqueous solution containing tetrahydrofuran and nonanoic acid. Pd and Ag reacted with diethyldithiocarbamate to form hydrophobic chelates, which were extracted into the vesicles of SUPRAS. Different parameters such as the concentration of chelating agent, sample pH, supramolecular solvent and the effect of foreign ions were studied. Under the optimal conditions, the linear ranges of Pd and Ag were from 10 to 1,000 μg/L. The relative recoveries of Pd and Ag in tap and river water samples at the spiking level of 10 ug/mL ranged from 90.8 to 116%. The relative standard deviations were 3.6-4.0% (n = 9), the limits of detection were 2.8 and 1.9 μg/L and the enrichment factors were 36 and 18 for Pd and Ag, respectively. The quantification limits were 3.2 and 2.4 μg/L. The method was successfully applied to the determination of Pd and Ag in water samples.
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Affiliation(s)
- Lifen Meng
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Yunnan Province 650224, China E-mail:
| | - Jiaxi Cheng
- Yunnan Metallurgy Group Co., Ltd., Kunming, Yunnan 650031, China
| | - Yaling Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Yunnan Province 650224, China E-mail:
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Téllez Soto CA, Costa AC, Ramos JM, Vieira LS, Rost NCV, Versiane O, Rangel JL, Mondragón MA, Raniero L, Martin AA. Surface enhanced Raman scattering, electronic spectrum, natural bond orbital, and Mulliken charge distribution in the normal modes of diethyldithiocarbamate copper (II) complex, [Cu(DDTC)2]. Spectrochim Acta A Mol Biomol Spectrosc 2013; 116:546-555. [PMID: 23978740 DOI: 10.1016/j.saa.2013.07.083] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Revised: 07/11/2013] [Accepted: 07/21/2013] [Indexed: 06/02/2023]
Abstract
Surface-enhanced Raman scattering (SERS) was used to study the interactions of the normal modes of the diethyldithiocarbamate copper (II) complex, [Cu(DDTC)2] on nano-structured mixture silver-gold surfaces and on silver surfaces. The electronic spectrum of this complex was measured and the charge transfer bands were assigned through the TD-PBE1PBE procedure. Natural bond orbital (NBO) were also carried out to study the Cu(II) hybridation leading to the square planar geometry of the framework of the [Cu(DDTC)2] complex, and to study which are the donor NBO and the acceptor NBO in meaningful charge transfer through the Second Order Perturbation Theory Analysis of the Fox Matrix in NBO basis. To see the electronic dispersion, the Mulliken electronic charges (MAC) were calculated for each normal mode and correlated with the SERS effect. Full assignment of the SERS spectra was also supported by carefully analysis of the distorted geometries generated by the normal modes.
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Affiliation(s)
- C A Téllez Soto
- Laboratory of Biomedical Vibrational Spectroscopy, IP&D, Research and Development Institute - UNIVAP, Av. Shishima Hifumi, 2911, Urbanova, 12.224-000 São José dos Campos, SP, Brazil.
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25
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Ajibade PA, Ejelonu BC. Group 12 dithiocarbamate complexes: synthesis, spectral studies and their use as precursors for metal sulfides nanoparticles and nanocomposites. Spectrochim Acta A Mol Biomol Spectrosc 2013; 113:408-414. [PMID: 23747381 DOI: 10.1016/j.saa.2013.04.113] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2013] [Revised: 04/14/2013] [Accepted: 04/24/2013] [Indexed: 06/02/2023]
Abstract
Zn(II), Cd(II) and Hg(II) dithiocarbamate complexes have been synthesized and characterized by elemental analysis, thermogravimetric analysis, UV-Vis, FTIR, (1)H- and (13)C NMR spectroscopy. The complexes were thermolysed at 180 °C and used as single molecule precursors for the synthesis of HDA capped ZnS, CdS and HgS nanoparticles and polymethylmethacrylate (PMMA) nanocomposites. The optical and structural properties of the nanoparticles and nanocomposites were studied by UV-Vis, PL, XRD and SEM. The crystallites sizes of the nanoparticles varied between 3.03 and 23.45 nm. SEM and EDX analyses of the nanocomposites confirmed the presence of the nanoparticles in the polymer matrix.
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Affiliation(s)
- Peter A Ajibade
- Department of Chemistry, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa.
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26
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Téllez Soto CA, Costa AC, Ramos JM, Versiane O, Ondar GF, Ferreira GB, Fávero PP, Rangel JL, Raniero L, Bueno Costa G, Bussi GGA, Martin AA. Surface enhanced Raman scattering, electronic spectrum and Mulliken charge distribution in the normal modes of bis(diethyldithiocarbamate)zinc(II) complex. Spectrochim Acta A Mol Biomol Spectrosc 2013; 110:443-449. [PMID: 23588299 DOI: 10.1016/j.saa.2013.03.039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2013] [Revised: 02/22/2013] [Accepted: 03/03/2013] [Indexed: 06/02/2023]
Abstract
Surface-enhanced Raman scattering (SERS) was used to study the interactions of the normal modes of the bis(diethyldithiocarbamate)zinc(II) complex, [Zn(DDTC)2], on nano-structured silver surfaces. The electronic spectrum of this complex was measured and the charge transfer bands were assigned through the TD-PBE1PBE procedure. To see the electronic dispersion, the Mulliken electronic charges were calculated for each normal mode and correlated with the SERS effect. Full assignment of the SERS spectra was also supported by carefully analysis of the distorted geometries generated by the normal modes.
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Affiliation(s)
- C A Téllez Soto
- Laboratory of Biomedical Vibrational Spectroscopy, IP&D, Research and Development Institute, UNIVAP, Av. Shishima Hifumi, 2911, Urbanova, 12.224-000 São José dos Campos, SP, Brazil.
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27
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Costa AC, Ondar GF, Versiane O, Ramos JM, Santos TG, Martin AA, Raniero L, Bussi GGA, Téllez Soto CA. DFT: B3LYP/6-311G (d, p) vibrational analysis of bis-(diethyldithiocarbamate)zinc(II) and natural bond orbitals. Spectrochim Acta A Mol Biomol Spectrosc 2013; 105:251-258. [PMID: 23314390 DOI: 10.1016/j.saa.2012.11.097] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Revised: 11/21/2012] [Accepted: 11/27/2012] [Indexed: 06/01/2023]
Abstract
Theoretical and experimental bands have been assigned for the Fourier Transform Infrared (FT-IR) and Fourier Transform Raman (FT-Raman) spectra of the bis-(diethydithiocarbamate)Zn(II) complex, [Zn(DDTC)(2)]. The calculations and spectra interpretation have been based on the DFT/B3LYP method, infrared and Raman second derivative spectra as well as band deconvolution analysis. To assign the metal-ligand normal modes the deviation percentage of the geometrical parameters was used. Results confirms a pseudo tetrahedral structure around the Zn(II) cation. The calculated infrared and Raman spectra has an excellent agreement with the experimental spectra. The Natural Bond Orbital analysis (NBO) was carried out as a way to study the Zn(II) hybridization leading to the pseudo tetrahedral geometry of the framework of the [Zn(DDTC)(2)] complex, and to study also which are the donor NBO and the acceptor NBO in meaningful charge transfer through the Second Order Perturbation Theory Analysis of Fox Matrix in NBO basis.
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Affiliation(s)
- A C Costa
- Departamento de Química Inorgânica, Instituto de Química, Universidade Federal Fluminense (UFF), Morro do Valonguinho s/n, Niterói-Centro, CEP 24210-150, RJ, Brazil
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28
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Costa AC, Ramos JM, Téllez Soto CA, Martin AA, Raniero L, Ondar GF, Versiane O, Moraes LS. Fourier Transform Infrared and Raman spectra, DFT: B3LYP/6-311G(d, p) calculations and structural properties of bis(diethyldithiocarbamate)copper(II). Spectrochim Acta A Mol Biomol Spectrosc 2013; 105:259-266. [PMID: 23314391 DOI: 10.1016/j.saa.2012.11.053] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Revised: 11/12/2012] [Accepted: 11/18/2012] [Indexed: 06/01/2023]
Abstract
Theoretical and experimental bands have been assigned for the Fourier Transform Infrared (FT-IR) and FT-Raman spectra of the bis(diethydithiocarbamate)Cu(II) complex, [Cu(DDTC)(2)]. The calculations and spectra interpretation have been based on the DFT/B3LYP method, infrared and Raman second derivative spectra, and band deconvolution analysis. To better assign the metal-ligand normal modes in the spectral region of low energy, the deviation percentage of the geometrical parameters was used, with values from the interpretation of the normal modes of L matrix. Results indicate a planar structure around the Cu(II) cation. The calculated infrared and Raman spectra, based on the proposed geometrical structure of the bis(diethyldithiocarbamate)copper(II) complex, agreed with the experimental spectra.
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Affiliation(s)
- A C Costa
- Departamento de Química Inorgânica, Instituto de Química, Universidade Federal Fluminense (UFF), Morro do Valonguinho s/n, Niterói-Centro CEP 24210-150, RJ, Brazil
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Tufekci M, Bulut VN, Elvan H, Ozdes D, Soylak M, Duran C. Determination of Pb(II), Zn(II), Cd(II), and Co(II) ions by flame atomic absorption spectrometry in food and water samples after preconcentration by coprecipitation with Mo(VI)-diethyldithiocarbamate. Environ Monit Assess 2013; 185:1107-1115. [PMID: 22527456 DOI: 10.1007/s10661-012-2618-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Accepted: 04/02/2012] [Indexed: 05/31/2023]
Abstract
A new, simple, and rapid separation and preconcentration procedure, for determination of Pb(II), Cd(II), Zn(II), and Co(II) ions in environmental real samples, has been developed. The method is based on the combination of coprecipitation of analyte ions by the aid of the Mo(VI)-diethyldithiocarbamate-(Mo(VI)-DDTC) precipitate and flame atomic absorption spectrometric determinations. The effects of experimental conditions like pH of the aqueous solution, amounts of DDTC and Mo(VI), standing time, centrifugation rate and time, sample volume, etc. and also the influences of some foreign ions were investigated in detail on the quantitative recoveries of the analyte ions. The preconcentration factors were found to be 150 for Pb(II), Zn(II) and Co(II), and 200 for Cd(II) ions. The detection limits were in the range of 0.1-2.2 μg L(-1) while the relative standard deviations were found to be lower than 5 % for the studied analyte ions. The accuracy of the method was checked by spiked/recovery tests and the analysis of certified reference material (CRM TMDW-500 Drinking Water). The procedure was successfully applied to seawater and stream water as liquid samples and baby food and dried eggplant as solid samples in order to determine the levels of Pb(II), Cd(II), Zn(II), and Co(II) ions.
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Affiliation(s)
- Mehmet Tufekci
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080 Trabzon, Turkey
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Uddin MN, Salam MA, Hossain MA. Spectrophotometric measurement of Cu(DDTC)2 for the simultaneous determination of zinc and copper. Chemosphere 2013; 90:366-373. [PMID: 22921658 DOI: 10.1016/j.chemosphere.2012.07.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 07/11/2012] [Accepted: 07/17/2012] [Indexed: 06/01/2023]
Abstract
A spectrophotometric procedure for the simultaneous determination of zinc(II) and copper(II) in a mixture using diethyldithiocarbamate (DDTC) as ligand has been described. Complexes formed with DDTC was extracted with CHCl(3)/CCl(4) and the absorbance was measured at 435 nm which is equivalent of Cu(II) in sample only as Zn(DDTC)(2) has no absorption. Zinc measurement is based on the quantitative displacement of zinc from Zn(DDTC)(2) by Cu(II) with the addition of excess copper(II) to the extract. The absorbance is measured again where additional absorbance is equivalent to zinc. The molar absorptivity and sandall's sensitivity at this wavelength are 2.86×10(5) mol(-1) L cm(-1) and 3.076 ng cm(-2), respectively. Reproducibility with in 4% and detection limits of 0.29 μg mL(-1) was obtained. Linear calibration range was 0.2-14 μg mL(-1) for zinc and 0.2-12 μg mL(-1) for copper with the regression coefficient (r(2)) 0.998 for each. In the presence of a suitable masking agent (EDTA) very good selectivity was achieved. The method was extended to the determination of zinc and copper in a number of environmental water and soil samples, biological, pharmaceutical, fertilizer and food samples.
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Zeng C, Xu X, Zhou N, Lin Y. Synergistic enhancement effect of room temperature ionic liquids for cloud point extraction combined with UV-vis spectrophotometric determination nickel in environmental samples. Spectrochim Acta A Mol Biomol Spectrosc 2012; 94:48-52. [PMID: 22503873 DOI: 10.1016/j.saa.2012.03.064] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2011] [Revised: 02/18/2012] [Accepted: 03/22/2012] [Indexed: 05/31/2023]
Abstract
A new method based on enhancement effect of room temperature ionic liquids for cloud point extraction trace amounts of nickel combined with UV-vis spectrophotometric determination was developed. Room temperature ionic liquids (RTILs) and diethyldithiocarbamate (DDTC) were used enhancement reagent and chelating reagent, respectively. The addition of room temperature ionic liquids leads to 3.0 times improvement in the determination of nickel. The nonionic surfactant Triton X-100 was used as the extractant. When the temperature of the system was higher than the cloud point of Triton X-100, Ni-DTC complex was extracted into Triton X-100 and separation of the analyte from the matrix was achieved. Some parameters that influenced cloud point extraction and subsequent determination were evaluated in detail, such as the concentrations of RTILs, DDTC and Triton X-100; pH of sample solution, as well as interferences. Under optimized conditions, an enrichment factor of 72 could be obtained, and the detection limit (LOD) for Ni was 0.5ng mL(-1). Relative standard deviations for five replicate determinations of the standard solution containing 50ng mL(-1) Ni was 3.9%. The proposed method was successfully applied to the determination of nickel in certified reference materials with satisfactory results.
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Affiliation(s)
- Chujie Zeng
- Department of Chemistry and Material, Yulin Normal College, Yulin, Guangxi 537000, China.
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Abstract
Stable Cu isotope ((65)Cu) was complexed with various representative dissolved organic carbon (DOC) types, including coastal seawater DOC, fulvic acid (FA), cyanobacteria spirulina (SP) DOC, histidine (His), cysteine (Cys), and lipophilic diethyl dithiocarbamate (DDC) at different concentrations. The uptake of these dissolved Cu species by the coastal green mussel Perna viridis was quantified for the first time. Copper complexed with different DOC types were taken up in some measure by mussels, depending on the DOC types. However, complexation generally reduced Cu uptake as compared to that of inorganic Cu species, and DOC type-specific negative relationships were found between DOC levels and Cu uptake. Strong Cu binding sites (including His and organic sulfur functional groups) within DOC appeared to control the inhibitory effects of DOC on Cu uptake, possibly due to the competitive binding of Cu between the dissolved phase and biological membranes. Therefore, differences in strong Cu binding site levels may explain the differences in bioavailability of Cu complexed with different types of DOC. At the same time, the variations in Cu-DOC uptake may also be partly attributed to the absorption of Cu-DOC complexes, especially for the small Cu-DOC complexes (e.g., Cu-Cys, Cu-His, or Cu-DDC). Our study highlights the importance of considering the specificity of Cu-DOC complexes when assessing biological exposure to dissolved Cu in natural waters, especially during events, such as phytoplankton bloom periods, that could modify DOC composition and concentrations.
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Affiliation(s)
- Huan Zhong
- Environmental and Resource Studies Program (ERS), Trent University, Peterborough, Ontario, Canada
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33
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Martinkova M, Kubickova B, Stiborova M. Effects of cytochrome P450 inhibitors on peroxidase activity. Neuro Endocrinol Lett 2012; 33 Suppl 3:33-40. [PMID: 23353841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Accepted: 11/15/2012] [Indexed: 06/01/2023]
Abstract
OBJECTIVES Of several enzymes metabolizing xenobiotics, cytochrome P450 (CYP) and peroxidase enzymes seem to be most important. One of the major challenges in studies investigating metabolism of xenobiotics is to resolve which of these two groups of enzymes is predominant to metabolize individual xenobiotic compounds. Utilization of selective inhibitors of CYP and peroxidase enzymes might be a useful tool to identify the contribution of these enzymes to metabolism of xenobiotics in samples, where both types of enzymes are present. The aim of this study was to investigate specificities of several known CYP inhibitors to these enzymes; whether they inhibit only the CYP enzymes and do not inhibit peroxidases. METHODS Since the oxidation of o-anisidine catalyzed by a model peroxidase used, horseradish peroxidase (HRP), is a two-substrate reaction, the inhibition potential of tested chemicals was studied with respect to both peroxidase substrates, o-anisidine and hydrogen peroxide. Initial velocities of o-anisidine oxidation by HRP under various conditions were determined spectrophotometrically. RESULTS The CYP inhibitors metyrapone, troleandomycine, disulfiram, sulfaphenazole, quinidine and 1-aminobenzotriazole do not inhibit o-anisidine oxidation catalyzed by HRP. In contrast, ketoconazole, diethyldithiocarbamate, ellipticine, α-naphtoflavone, proadifen SKF525A, piperonylbutoxide, were found to inhibit not only the CYPs, but also the HRP-mediated oxidation of o-anisidine. Interestingly, α-naphtoflavone inhibits oxidation of o-anisidine by HRP with respect to H2O2, but not with respect to o-anisidine. Diethyldithiocarbamate is the most potent peroxidase inhibitor of o-anisidine oxidation with Ki with respect to o-anisidine of 10 μM and Ki with respect to H2O2 of 60 μM, being even the better peroxidase inhibitor than the classical "peroxidase inhibitor" - propyl gallate (Ki with respect to o-anisidine of 60 μM and Ki with respect to H2O2 of 750 μM). CONCLUSIONS The results of the present study demonstrate that 1-aminobenzotriazole, a potent inhibitor of various CYP enzymes, seems to be the best candidate suitable for utilization in studies evaluating participation of CYP enzymes in metabolism of xenobiotics in various complex biological materials containing both CYP and peroxidase enzymes. Moreover, precaution to prevent misinterpretation of results is necessary in cases when proadifen SKF525A, piperonylbutoxide, diethyldithiocarbamate, ketoconazole, α-naphtoflavone and ellipticine are used in similar studies (as CYP inhibitors in various complex biological materials containing both CYP and peroxidase enzymes), since these chemicals can except of CYP enzymes inhibit also peroxidase-mediated reactions.
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Figueira P, Lopes CB, Daniel-da-Silva AL, Pereira E, Duarte AC, Trindade T. Removal of mercury (II) by dithiocarbamate surface functionalized magnetite particles: application to synthetic and natural spiked waters. Water Res 2011; 45:5773-5784. [PMID: 21924455 DOI: 10.1016/j.watres.2011.08.057] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Revised: 07/22/2011] [Accepted: 08/27/2011] [Indexed: 05/31/2023]
Abstract
In order to take advantage of the high affinity between mercury and sulphur, magnetite (Fe(3)O(4)) particles functionalized with dithiocarbamate groups (CS(2)(-)), were synthesized to be used as a new type of sorbent to remove Hg (II) from synthetic and natural spiked waters. The effectiveness of this type of sorbent was studied, and its potential as cleanup agent for contaminated waters was assessed. Batch stirred tank experiments were carried out by contacting a volume of solution with known amounts of functionalized Fe(3)O(4) particles, in order to study the effect of sorbent dose, salinity, and the kinetics and the equilibrium of this unit operation. A complete Hg (II) removal (ca. 99.8%) was attained with 6 mg/L of magnetic particles for an initial metal concentration of 50 μg/L. It was confirmed that highly complex matrices, such as seawater (ca. 99%) and river water (ca. 97%), do not affect the removal capacity of the functionalized magnetic particles. Concerning isotherms, no significant differences were observed between two- and three-parameter models (P = 0.05%); however, Sips isotherm provided the lowest values of SS and S(x/y), predicting a maximum sorption capacity of 206 mg/g, in the range of experimental conditions under study. The solid loadings measured in this essay surmount the majority of the values found in literature for other type of sorbents.
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Affiliation(s)
- P Figueira
- CICECO & Department of Chemistry, University of Aveiro, Campus de Santiago, Aveiro, Portugal
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Wang J, Zhou X, Ma H, Tao G. Diethyldithiocarbamate functionalized CdSe/CdS quantum dots as a fluorescent probe for copper ion detection. Spectrochim Acta A Mol Biomol Spectrosc 2011; 81:178-183. [PMID: 21798793 DOI: 10.1016/j.saa.2011.05.098] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Revised: 05/27/2011] [Accepted: 05/30/2011] [Indexed: 05/31/2023]
Abstract
A new fluorescent probe for copper ion detection is reported that it is based on the quenching of the fluorescence of the diethyldithiocarbamate (DDTC)-functionalized quantum dots (QDs) in the presence of copper ions. DDTC was bound to the QDs via the surface ligand exchange to form DDTC-QDs conjugates following the capping of 2-mercaptoacetic acid on the core-shell CdSe/CdS QDs. It was found that the fluorescence intensity of the conjugates was quenched after coordinated with Cu(2+). A linear relationship existed between the extent of quenching and the concentration of copper in the range of 0-100 μg L(-1), with a detection limit of 0.29 μg L(-1) (3σ). The DDTC-functionalized QDs showed excellent selectivity for Cu(2+) over other metal cations. The fluorescent probe was successfully used for the determination of copper in environmental samples.
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Affiliation(s)
- Jiazi Wang
- College of Chemistry, Chemical Engineering and Materials Science, Suzhou, Jiangsu 215123, China
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36
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National Toxicology Program. Sulfallate. Rep Carcinog 2011; 12:392-3. [PMID: 21863099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
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Abstract
ZnS, a II-VI semiconductor with a relatively high direct bandgap (approximately 3.6 eV) in the near-UV region, has potential applications in areas such as solar cells, lasers and displays. In addition, ZnS nanoparticles can be applied as phosphors, probes for bioimaging, emitters in light emitting diodes and photocatalysts. Here, we report synthesis of cubic ZnS nanoparticles from a low-cost single-source precursor in a continuous spray pyrolysis reactor. In this approach, the evaporation and decomposition of precursor and nucleation of particles occur sequentially. Product particles were characterized by HRTEM, XRD, and EDX. Particles with diameters ranging from 2 to 7 nm were produced. HF was used to remove ZnO impurities and other surface contamination. As-synthesized ZnS nanoparticles exhibit blue photoluminescence near 440 nm under UV excitation and have quantum yields up to 15% after HF treatment. This demonstrates a potentially general approach for continuous low-cost synthesis of semiconductor quantum dots for applications where tight control of the size distribution is less important than scalable, economical production.
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Affiliation(s)
- Sha Liu
- Department of Chemical and Biological Engineering, The University at Buffalo (SUNY), Buffalo, NY 14260-4200, USA
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Sankararamakrishnan N, Chauhan D, Nickson RT, Tripathi RM, Iyengar L. Evaluation of two commercial field test kits used for screening of groundwater for arsenic in Northern India. Sci Total Environ 2008; 401:162-167. [PMID: 18514262 DOI: 10.1016/j.scitotenv.2008.03.042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2007] [Revised: 03/31/2008] [Accepted: 03/31/2008] [Indexed: 05/26/2023]
Abstract
In this study two relatively new arsenic field kits, namely Wagtech Digital Arsenator (WFTK) and Chem-In Corp field test kit (CFTK) for arsenic were evaluated. The response of the two field test kits to known standards (Both As(III) and As(V)) is detailed. In addition around 157 arsenic-contaminated field samples obtained from various locations of Ballia and Kanpur districts, U.P., India were tested using the two kits and the results were compared with the laboratory-based colorimetric method (silver diethyldithiocarbamate method, SDDC). The concentration of arsenic in the 157 samples ranged from 0 to 468 microg l(-1). WFTK is seen to be suitable for measuring arsenic concentration <5-100 microg l(-1) using the digital meter. CFTK was not able to detect As(V) and its usage is cautioned in Uttar Pradesh where As(V) is seen to occur in appreciable concentrations. The Pearson's correlation between the silver diethyldithiocarbamate method and WFTK was found to be 0.87 and for the corresponding correlation with CFTK was 0.41 in the concentration range used in this study. Spearman's rank correlation coefficients comparing the WFTK and CFTK to laboratory measurements in the concentration range of 0-100 microg l(-1) were 0.95 (p<0.001) and 0.64 (p<0.001) respectively.
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Affiliation(s)
- Nalini Sankararamakrishnan
- Facility for Ecological and Analytical Testing, 302, Southern Laboratories, Indian Institute of Technology, Kanpur, UP 208016, India.
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Gao X, Wang W, Ye T, Wang F, Lan Y. Utilization of washed MSWI fly ash as partial cement substitute with the addition of dithiocarbamic chelate. J Environ Manage 2008; 88:293-9. [PMID: 17466440 DOI: 10.1016/j.jenvman.2007.02.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2006] [Revised: 01/28/2007] [Accepted: 02/17/2007] [Indexed: 05/15/2023]
Abstract
The management of the big amount of fly ash as hazardous waste from the municipal solid waste incinerator (MSWI) has encountered many problems in China. In this study, a feasibility research on MSWI fly ash utilization as partial cement substitute in cement mortars was therefore carried out. MSWI fly ash was subjected to washing process to reduce its chlorine content (from 10.16% to 1.28%). Consequently, it was used in cement mortars. Ten percent and 20% replacement of cement by washed ash showed acceptable strength properties. In TCLP and 180-day monolithic tests, the mortars with washed ash presented a little stronger heavy metal leachability, but this fell to the blank level (mortar without washed ash) with the addition of 0.25% chelate. Therefore, this method is proposed as an environment-friendly technology to achieve a satisfactory solution for MSWI fly ash management.
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Affiliation(s)
- Xingbao Gao
- Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.
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Joung YK, Choi JH, Bae JW, Park KD. Hyper-branched poly(poly(ethylene glycol)methacrylate)-grafted surfaces by photo-polymerization with iniferter for bioactive interfaces. Acta Biomater 2008; 4:960-6. [PMID: 18337197 DOI: 10.1016/j.actbio.2008.02.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2007] [Revised: 01/24/2008] [Accepted: 02/04/2008] [Indexed: 11/18/2022]
Abstract
A new hyper-branched surface in which three species of architectures were constructed as stem chain, branched stem and twig chain-grafted branched chain of poly(poly(ethylene glycol)methacrylate) (poly(PEGMA)) by photo-polymerization using dithiocarbamyl group (DC) as iniferter was prepared and characterized. For these surfaces, radical copolymerization of styrene and an iniferter-activated chain that was previously synthesized was performed for using as base materials for surface coating. On a DC-activated surface, hyper-branched poly(PEGMA) was introduced by photo-polymerization and dithiocarbamylation. All modified surfaces were analyzed by X-ray photoelectron spectroscopy (XPS) and water contact angle measurements. Our results demonstrated that a highly hyper-branched graft architecture of poly(PEGMA) can be constructed on PU surface by photo-polymerization using dithiocarbamyl group as iniferter, in which first, second and third generation gave stem chain, branched chain and twig chain of poly(PEGMA), respectively. Our hyper-branched surfaces could be regulated by photo-irradiation time and might be controlled by feed amounts or other reaction conditions. This highly dense architecture of PEG chain with hydrophilicity and chain mobility, grafted on surface, is expected to be effectively utilized in bio-implantable substrates or micro- or nano-patterned surfaces for immobilization of bioactive molecules in biomedical fields.
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Affiliation(s)
- Yoon Ki Joung
- Department of Molecular Science and Technology, Ajou University, Yeoungtong, Suwon, Republic of Korea
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Talebi SM, Malekiha M. Simultaneous determination of trace heavy metals in ambient aerosols by inductively coupled plasma atomic emission spectrometry after pre-concentration with sodium diethyldithiocarbamate. J Environ Sci Eng 2008; 50:197-202. [PMID: 19552073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The simultaneous determination of heavy metals associated with airborne particulate matter in the atmosphere of the city Isfahan (Iran) was performed by inductively coupled plasma atomic emission spectrometry (ICP-AES) after pre-concentration with sodium diethyldithiocarbamate. The preconcentration procedure developed found instrumental to determine the trace heavy metals associated with ambient aerosols collected at a short sampling period or collected from rural areas where the concentrations of these metals are much less than those in urban areas. Several samples were analyzed by both flame atomic absorption spectrometry (FAAS) as a conventional method and the proposed method. The results obtained by the two methods were found in good agreement. The method was applied to the determination of atmospheric level of heavy metals in rural area and also for study of variation in levels of heavy metals in urban atmosphere during the days and nights.
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Affiliation(s)
- S M Talebi
- Department of Chemistry, Isfahan University, Isfahan 81744, Iran
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Abstract
Environmental pollutants comprise a variety of compounds from inorganic anions, cations, ionizable organic compounds and moderately hydrophobic organic compounds to highly hydrophobic organic compounds. Correspondingly different separation strategies are required for their separation. In this chapter, we have presented some methods for the separation and the analysis of the organic pollutants such as polycyclic aromatic hydrocarbons, phenoxy acids, dithiocarbamates, paraquat and diquat, endocrine disruptors, toxins and explosives.
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Sjakste N, Andrianov VG, Boucher JL, Shestakova I, Baumane L, Dzintare M, Meirena D, Kalvinsh I. Paradoxical effects of two oximes on nitric oxide production by purified NO synthases, in cell culture and in animals. Nitric Oxide 2007; 17:107-14. [PMID: 17702619 DOI: 10.1016/j.niox.2007.06.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2007] [Revised: 06/25/2007] [Accepted: 06/26/2007] [Indexed: 11/24/2022]
Abstract
We have studied the impact of two novel compounds TO-85 (2,6-di-(alpha-aziridino-alpha-hydroxyiminomethyl)pyridine and TO-133 (bis-(diaziridinoglyoximato)copper), designed as NO donors, on nitrite production by cell cultures, NO production in rat tissues and their ability to inhibit purified NO synthases (NOS). Both substances induced considerable increase of nitrite production in cell cultures. When NO production was assayed in rat organs by means of ESR using Fe(DETC) as a spin trap the anticipated NO-increasing activity of TO-85 was observed only in kidneys; the NO level increasing almost 10-fold. Treatment of rats with TO-133, decreased the NO concentration in brain cortex, cerebellum and liver. When the drugs were administered to animals with high level of iNOS expression induced by LPS, TO-85 did not significantly modify the LPS-induced NO production; administration of TO-133 caused a significant decrease of NO production in blood, brain cortex and cerebellum. Only high concentrations of TO-85 were capable of inhibiting iNOS (IC50=7 mM), the substance inhibited eNOS at lower concentrations (IC50=250 microM). Inhibitory activities of TO-85 on nNOS were dependent on BH4 concentrations, suggesting eventual competition of TO-85 with BH4 when the substance interacts with nNOS. TO-133 reduced eNOS activity with IC50=200 microM, nNOS activity with IC50=200 microM, iNOS activity was not much affected by this substance. Thus, the two tested compounds manifest opposite effects on NO production by purified enzymes and in cell culture. The pattern of the NO synthesis modification in a living animal appears to be even more complex. Our results stress the importance of direct measurements of NO in the tissues using the ESR method.
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Affiliation(s)
- N Sjakste
- Latvian Institute of Organic Synthesis, Aizkraukles Street 21, Riga LV1006, Latvia.
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Senturk HB, Gundogdu A, Bulut VN, Duran C, Soylak M, Elci L, Tufekci M. Separation and enrichment of gold(III) from environmental samples prior to its flame atomic absorption spectrometric determination. J Hazard Mater 2007; 149:317-23. [PMID: 17482351 DOI: 10.1016/j.jhazmat.2007.03.083] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2007] [Revised: 03/28/2007] [Accepted: 03/30/2007] [Indexed: 05/15/2023]
Abstract
A simple and accurate method was developed for separation and enrichment of trace levels of gold in environmental samples. The method is based on the adsorption of Au(III)-diethyldithiocarbamate complex on Amberlite XAD-2000 resin prior to the analysis of gold by flame atomic absorption spectrometry after elution with 1 molL(-1) HNO3 in acetone. Some parameters including nitric acid concentration, eluent type, matrix ions, sample volume, sample flow rate and adsorption capacity were investigated on the recovery of gold(III). The recovery values for gold(III) and detection limit of gold were greater than 95% and 16.6 microgL(-1), respectively. The preconcentration factor was 200. The relative standard deviation of the method was <6%. The adsorption capacity of the resin was 12.3 mg g(-1). The validation of the presented procedure was checked by the analysis of CRM-SA-C Sandy Soil certified reference material. The presented procedure was applied to the determination of gold in some environmental samples.
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Affiliation(s)
- Hasan Basri Senturk
- Department of Chemistry, Faculty of Arts & Sciences, Karadeniz Technical University, 61080 Trabzon, Turkey
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Xiao Y, Ling J, Qian S, Lin A, Zheng W, Xu W, Luo Y, Zhang M. Preconcentration of trace arsenite and arsenate with titanium dioxide nanoparticles and subsequent determination by silver diethyldithiocarbamate spectrophotometric method. Water Environ Res 2007; 79:1015-22. [PMID: 17910371 DOI: 10.2175/106143007x183998] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
A novel method of preconcentration of trace arsenite and arsenate by using titanium dioxide nanoparticles as adsorbent was described. The concentrations of preconcentrated arsenite and arsenate were determined by a silver diethyldithiocarbamate spectrophotometric method without desorption. Batch adsorption experiments were carried out as a function of the pH, contact time, amount of titanium dioxide nanoparticles, and solution volume. In the pH range 5 to 6, adsorption rates of arsenite and arsenate were higher than 98%. The calibration coefficient was 0.9991, and the linear range was 0 to 100 microg/L. The developed method was precise, with the relative standard deviation <5% at concentration level of 10 microg/L, with a detection limit (3sigma, n=6) of 0.44 microg/L. The accuracy of the method for total arsenic was validated by standard reference materials (SRM 3103a) (National Institute of Standards and Technology, Gaithersburg, Maryland). The method was also applied to the analysis of arsenite and arsenate in natural water samples to verify the accuracy. The recovery values remained in a narrow range, from 95 to 103%.
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Affiliation(s)
- Yabing Xiao
- Tianjin Enter-Exit Inspection and Quarantine Bureau, Tianjin, China
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Duran C, Gundogdu A, Bulut VN, Soylak M, Elci L, Sentürk HB, Tüfekci M. Solid-phase extraction of Mn(II), Co(II), Ni(II), Cu(II), Cd(II) and Pb(II) ions from environmental samples by flame atomic absorption spectrometry (FAAS). J Hazard Mater 2007; 146:347-55. [PMID: 17223260 DOI: 10.1016/j.jhazmat.2006.12.029] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2006] [Revised: 12/11/2006] [Accepted: 12/12/2006] [Indexed: 05/13/2023]
Abstract
A new method using a column packed with Amberlite XAD-2010 resin as a solid-phase extractant has been developed for the multi-element preconcentration of Mn(II), Co(II), Ni(II), Cu(II), Cd(II), and Pb(II) ions based on their complex formation with the sodium diethyldithiocarbamate (Na-DDTC) prior to flame atomic absorption spectrometric (FAAS) determinations. Metal complexes sorbed on the resin were eluted by 1 mol L(-1) HNO3 in acetone. Effects of the analytical conditions over the preconcentration yields of the metal ions, such as pH, quantity of Na-DDTC, eluent type, sample volume and flow rate, foreign ions etc. have been investigated. The limits of detection (LOD) of the analytes were found in the range 0.08-0.26 microg L(-1). The method was validated by analyzing three certified reference materials. The method has been applied for the determination of trace elements in some environmental samples.
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Affiliation(s)
- Celal Duran
- Department of Chemistry, Faculty of Art and Science, Karadeniz Technical University, 61080 Trabzon, Turkey
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Bulut VN, Gundogdu A, Duran C, Senturk HB, Soylak M, Elci L, Tufekci M. A multi-element solid-phase extraction method for trace metals determination in environmental samples on Amberlite XAD-2000. J Hazard Mater 2007; 146:155-63. [PMID: 17222968 DOI: 10.1016/j.jhazmat.2006.12.013] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2006] [Revised: 11/25/2006] [Accepted: 12/04/2006] [Indexed: 05/13/2023]
Abstract
A method for the preconcentration of some transition elements at trace level was proposed using a column filled with Amberlite XAD-2000 resin. Metal ions were adsorbed on XAD-2000 as their diethyldithiocarbamate chelates, then analytes retained on the resin were eluted by 1 mol L(-1) nitric acid in acetone and determined by flame atomic absorption spectrometry (FAAS). The influences of some analytical parameters including pH of sample solution, ligand amount, the type, concentration and volume of elution solution, flow rates of the sample and eluent solutions, adsorption capacity of the resin and sample volume on the preconcentration efficiency have been investigated. The influences of some matrix elements were also examined. The detection limit (N=20, 3 sigma) for Mn(II), Fe(II), Co(II), Cu(II), Cd(II), Zn(II), Pb(II) and Ni(II) were found as 0.20, 0.35, 0.25, 0.20, 0.20, 0.15, 0.45 and 0.25 microg L(-1), respectively. The validation of the procedure was carried out by analysis of certified reference materials. The proposed method was applied to natural waters and kale vegetable (Brassica oleracea var. acephala).
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Affiliation(s)
- Volkan Numan Bulut
- Department of Chemistry, Giresun Faculty of Arts & Sciences, Karadeniz Technical University, 28049 Giresun, Turkey
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Worms IAM, Parthasarathy N, Wilkinson KJ. Ni uptake by a green alga. 1. Validation of equilibrium models for complexation effects. Environ Sci Technol 2007; 41:4258-63. [PMID: 17626422 DOI: 10.1021/es0630339] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Short-term (< 60 min) internalization fluxes (J(int)) by the green alga Chlamydomonas reinhardtii were measured in the presence of a variety of ligands forming hydrophilic (citric, diglycolic, or nitrilotriacetic acids), amphiphilic (Suwannee River fulvic and humic acids), and hydrophobic (oxine, diethyldithiocarbamate) Ni complexes. Free nickel concentrations, ranging from 10(-10) to 10(-3) M, were evaluated by thermodynamic modeling and by a resin exchange technique. Ni internalization appeared to occur via a single transport site that was characterized by a conditional stability constant (pH 6.0, I = 10(-2) M) of 10(5.1) M(-1). In the presence of humic substances, Ni uptake could be quantitatively predicted on the basis of Ni2+ concentrations for two algae: C. reinhardtii and Chlorella kesslerii. In the presence of the hydrophobic ligands, an increase in permeability was observed due to the formation of neutral, lipophilic complexes.
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Affiliation(s)
- Isabelle A M Worms
- CABE (Analytical and Biophysical Environmental Chemistry), University of Geneva, 30 Quai Ernest Ansermet, 1211 Geneva 4, Switzerland
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Pang H, Chen D, Cui QC, Dou QP. Sodium diethyldithiocarbamate, an AIDS progression inhibitor and a copper-binding compound, has proteasome-inhibitory and apoptosis-inducing activities in cancer cells. Int J Mol Med 2007; 19:809-16. [PMID: 17390087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023] Open
Abstract
Diethyldithiocarbamate (DDTC) is a member of the dithiocarbamate family and a potent copper-chelating agent. DDTC was used in a clinical trial for patients with HIV-1 infection and showed a significant delay in progression to AIDS. In this study, we investigated the effects of DDTC-copper complex in human prostate and breast cancer cells. We found that DDTC was capable of binding copper and forming a new complex that potently inhibited the proteasomal chemotrypsin-like activity, decreased expression of androgen receptor (AR), estrogen receptor (ER) alpha and ERbeta proteins, and induced apoptosis in both prostate and breast cancer cells. Our data support the concept of using accumulated copper in cancer cells and tissues as a novel target for chemotherapy. This study provides a mechanistic interpretation for utilization of copper chelators in cancer treatment.
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Affiliation(s)
- Haiyan Pang
- The Prevention Program, Barbara Ann Karmanos Cancer Institute, and Department of Pathology, School of Medicine, Wayne State University, Detroit, MI 48201, USA
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Fu F, Chen R, Xiong Y. Comparative investigation of N,N'-bis-(dithiocarboxy)piperazine and diethyldithiocarbamate as precipitants for Ni(II) in simulated wastewater. J Hazard Mater 2007; 142:437-42. [PMID: 17008004 DOI: 10.1016/j.jhazmat.2006.08.036] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2005] [Revised: 06/29/2006] [Accepted: 08/18/2006] [Indexed: 05/12/2023]
Abstract
The performances of a coordination polymerization precipitant, N,N'-bis-(dithiocarboxy)piperazine (BDP) were compared with the widely used heavy metal precipitant, diethyldithiocarbamate (DDTC), through the treatment of three kinds of nickel-containing wastewaters, NiSO(4), nickel citrate (NiCA) and Ni(2+)-dye. Results indicated that both BDP and DDTC at their stiochiometric doses could reduce 50.00 mg l(-1) free nickel(II) to lower than 1.0 mg l(-1) (discharge limit of nickel ions in China) and 10% precipitants doses increase could treat NiCA containing 50.00 mg l(-1) Ni(2+) to meet the discharge limit. But [NiBDP](n) coordination polymerization precipitates had more rapid settling speed than Ni(DDTC)(2) precipitates. It was also observed that BDP could still partly remove Reactive Brilliant Red X-3B from Ni(II)-dye integrated wastewater through the adsorption of the precipitates [NiBDP](n), in addition to precipitating Ni(II). A 1:1 stiochiometric dose of BDP/Ni(II) could decrease Ni(II) from 50.00 to 0.87 mg l(-1), and simultaneously reduce the dye from 30.00 to 19.52 mg l(-1).
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Affiliation(s)
- Fenglian Fu
- School of Environmental Science and Engineering, Zhongshan University, Guangzhou 510275, PR China
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