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Gerhards L, Wittstock G. Unidirectional Current in Layered Metal Hexacyanometallate Thin Films: Implication for Alternative Wet-Processed Electronic Materials. ACS OMEGA 2023; 8:44139-44147. [PMID: 38027322 PMCID: PMC10666236 DOI: 10.1021/acsomega.3c06447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 10/16/2023] [Accepted: 10/20/2023] [Indexed: 12/01/2023]
Abstract
Rectifying behavior of alternative electronic materials is demonstrated with layered structures of a crystalline coordination network whose mixed ionic and electronic conductivity can be manipulated by switching the redox state of coordinated transition-metal ions. The coordinated transition-metal ions can convey additional functionality such as (redox)catalysis or electrochromism. In order to obtain rectifying behavior and charge trapping, layered films of such materials are explored. Specifically, layered films of iron hexacyanoruthenate (Fe-HCR) and nickel hexacyanoferrate (Ni-HCF) were formed by the combination of different deposition procedures. They comprise electrodeposition during voltammetric cycles for Fe-HCR and Ni-HCF, layer-by-layer deposition of Ni-HCF without redox chemistry, and drop casting of presynthesized Ni-HCF nanoparticles. The obtained materials were structurally characterized by X-ray diffraction analysis, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy for nanoparticles, and scanning force microscopy (SFM). Voltammetry in 1 mol L-1 KCl and current-voltage curves (I-V curves) recorded between a conductive SFM tip and the back electrode outside of an electrolyte solution demonstrated charge trapping and rectifying behavior based on the different formal potentials of the redox centers in the films.
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Affiliation(s)
- Lena Gerhards
- School of Mathematics and Science,
Institute of Chemistry, Carl von Ossietzky
University of Oldenburg, 26111 Oldenburg, Germany
| | - Gunther Wittstock
- School of Mathematics and Science,
Institute of Chemistry, Carl von Ossietzky
University of Oldenburg, 26111 Oldenburg, Germany
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2
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Jain S, Kumar V, Koul A, Singh AK, Sandal N. In vitro and in vivo removal efficacy of insoluble Prussian blue in combination with calcium polystyrene sulfonate for thallium. Biometals 2023; 36:1125-1140. [PMID: 37222858 DOI: 10.1007/s10534-023-00508-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 05/05/2023] [Indexed: 05/25/2023]
Abstract
The similarities between thallium and potassium have suggested the use of calcium polystyrene sulfonate (CPS), an oral ion exchange resin, as a potential agent against thallium intoxication. Therefore, the study was an attempt to evaluate the efficacy of CPS and Prussian blue when given alone or in combination against thallium toxicity. The effect on binding capacity was investigated in terms of contact time, amount of CPS, influence of pH, simulated physiological solutions and interference of potassium ions. Also, rats were given single dose of thallium chloride (20 mg kg-1) and the treatment with PB and CPS was given for 28 days as CPS 30 g kg-1, orally, twice a day, PB 3 g kg-1, orally, twice a day and their combination. The effect of antidotal treatment was evaluated by calculating the thallium levels in various organs, blood, urine and feces. The results of the in vitro study indicated exceedingly quick binding in the combination of CPS and PB as compared to PB alone. Also, it was found that the binding capacity at pH 2.0 was considerably increased for PB with CPS (184.656 mg g-1) as compared to PB (37.771 mg g-1). Furthermore, statistically significant results were obtained in the in vivo study as after 7th day, thallium levels in blood of rats treated with combination were reduced by 64% as compared to control group and 52% as compared to alone PB treated group. Also, Tl retention in liver, kidney, stomach, colon and small intestine of combination treated rats was significantly reduced to 46%, 28%, 41%, 32% and 33% respectively, as compared to alone PB treated group. These findings demonstrate this as a good antidotal option against thallium intoxication.
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Affiliation(s)
- Shelly Jain
- Division of CBRN Defence, Institute of Nuclear Medicine and Allied Sciences (INMAS), Defence Research and Development Organization (DRDO), Brig. S.K. Mazumdar Road, Timarpur, New Delhi, 110054, India
- Department of Biophysics, Panjab University, Chandigarh, India
| | - Vivek Kumar
- Division of CBRN Defence, Institute of Nuclear Medicine and Allied Sciences (INMAS), Defence Research and Development Organization (DRDO), Brig. S.K. Mazumdar Road, Timarpur, New Delhi, 110054, India
- Delhi Pharmaceutical Sciences and Research University, New Delhi, India
| | - Ashwani Koul
- Department of Biophysics, Panjab University, Chandigarh, India
| | - Ajay Kumar Singh
- Amity Foundation for Science, Technology and Innovation Alliances, Amity University, Noida, Uttar Pradesh, India
| | - Nidhi Sandal
- Division of CBRN Defence, Institute of Nuclear Medicine and Allied Sciences (INMAS), Defence Research and Development Organization (DRDO), Brig. S.K. Mazumdar Road, Timarpur, New Delhi, 110054, India.
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3
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Correia MS, Lopez AM. Case Files of the Medical Toxicology Fellowship at the Oregon Poison Center: Thallotoxicosis. J Med Toxicol 2022; 18:248-255. [PMID: 35267169 PMCID: PMC9198136 DOI: 10.1007/s13181-022-00880-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/17/2022] [Accepted: 01/23/2022] [Indexed: 12/13/2022] Open
Affiliation(s)
- Matthew S. Correia
- grid.5288.70000 0000 9758 5690Oregon Health and Science University, 3181 SW Sam Jackson Park Rd, Portland, OR 97239 USA ,Oregon Poison Center, 3181 SW Sam Jackson Park Rd, Portland, OR 97239 USA
| | - Annette M. Lopez
- grid.5288.70000 0000 9758 5690Oregon Health and Science University, 3181 SW Sam Jackson Park Rd, Portland, OR 97239 USA ,Oregon Poison Center, 3181 SW Sam Jackson Park Rd, Portland, OR 97239 USA
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4
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Anaya-Ramos L, Díaz-Ruíz A, Ríos C, Mendez-Armenta M, Montes S, Aguirre-Vidal Y, García-Jiménez S, Baron-Flores V, Monroy-Noyola A. The acute systemic toxicity of thallium in rats produces oxidative stress: attenuation by metallothionein and Prussian blue. Biometals 2021; 34:1295-1311. [PMID: 34529183 DOI: 10.1007/s10534-021-00343-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 09/01/2021] [Indexed: 01/09/2023]
Abstract
Thallium (TI) is one of the most toxic heavy metals. Human exposure to Tl occurs through contaminated drinking water and from there to food, a threat to health. Recently, environmental contamination by Tl has been reported in several countries, urging the need for studies to determine the impact of endogenous and exogenous mechanisms preventing thallium toxicity. The cytoprotective effect of metallothionein (MT), a protein with high capacity to chelate metals, at two doses (100 and 600 µg/rat), was tested. Prussian blue (PB) (50 mg/kg) was administered alone or in combination with MT. A dose of Tl (16mg/kg) was injected i.p. to Wistar rats. Antidotes were administered twice daily, starting 24h after Tl injection, for 4 days. Tl concentrations diminished in most organs (p < 0.05) by effect of PB, alone or in combination with MT, whereas MT alone decreased Tl concentrations in testis, spleen, lung and liver. Likewise, brain thallium also diminished (p < 0.05) by effect of PB and MT alone or in combination in most of the regions analyzed (p < 0.05). The greatest diminution of Tl was achieved when the antidotes were combined. Plasma markers of renal damage increased after Tl administration, while PB and MT, either alone or in combination, prevented the raise of those markers. Only MT increased the levels of reduced glutathione (GSH) in the kidney. Finally, increased Nrf2 was observed in liver and kidney, after treatment with MT alone or in combination with PB. Results showed that MT alone or in combination with PB is cytoprotective after thallium exposure.
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Affiliation(s)
- Laura Anaya-Ramos
- Laboratorio de Neuroprotección, Facultad de Farmacia, Universidad Autónoma del Estado de Morelos Cuernavaca, Av. Universidad 1001 Col. Chamilpa, Cuernavaca, C.P. 62209, Morelos, Mexico
| | - Araceli Díaz-Ruíz
- Departamento de Neuroquímica, Instituto Nacional de Neurología y Neurocirugía, Ciudad de México, Mexico
| | - Camilo Ríos
- Departamento de Neuroquímica, Instituto Nacional de Neurología y Neurocirugía, Ciudad de México, Mexico
- Laboratorio de Neurofarmacología Molecular, Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana-Xochimilco, Ciudad de Mexico, Mexico
| | - Marisela Mendez-Armenta
- Laboratorio de Neuropatología experimental, Instituto Nacional de Neurología y Neurocirugía, Ciudad de México, Mexico
| | - Sergio Montes
- Unidad Académica Multidiciplinaria, Reynosa-Aztlan, Reynosa, Tamaulipas, Mexico
| | - Yoshajandith Aguirre-Vidal
- Red de Estudios Moleculares Avanzados, Clúster Científico y Tecnológico BioMimic®, Instituto de Ecología A.C. (INECOL), Xalapa, Veracruz, México
| | - Sara García-Jiménez
- Laboratorio de Neuroprotección, Facultad de Farmacia, Universidad Autónoma del Estado de Morelos Cuernavaca, Av. Universidad 1001 Col. Chamilpa, Cuernavaca, C.P. 62209, Morelos, Mexico
| | - Veronica Baron-Flores
- Laboratorio de Neurofarmacología Molecular, Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana-Xochimilco, Ciudad de Mexico, Mexico
| | - Antonio Monroy-Noyola
- Laboratorio de Neuroprotección, Facultad de Farmacia, Universidad Autónoma del Estado de Morelos Cuernavaca, Av. Universidad 1001 Col. Chamilpa, Cuernavaca, C.P. 62209, Morelos, Mexico.
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5
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Wang X, Cheng L. Multifunctional Prussian blue-based nanomaterials: Preparation, modification, and theranostic applications. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213393] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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6
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Faustino PJ, Brown A, Lowry B, Yang Y, Wang Y, Khan MA, Dunbar KR, Mohammad A. Quantitative evaluation of the thallium binding of soluble and insoluble Prussian blue hexacyanoferrate analogs: A scientific comparison based on their critical quality attributes. Int J Pharm 2019; 569:118600. [PMID: 31401298 DOI: 10.1016/j.ijpharm.2019.118600] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 08/01/2019] [Accepted: 08/03/2019] [Indexed: 11/29/2022]
Abstract
There has been a long-standing discussion in the scientific literature on the thallium (Tl) binding capacity of ferric hexacyanoferrate (insoluble) and potassium hexacyanoferrate (soluble) forms of Prussian blue (PB). The literature sometime suggests that the soluble form of PB should be used to treat thallium poisoning, instead of the FDA approved insoluble form of PB. The literature debate is further complicated by the lack of fundamental characterization data such as critical quality attributes (CQAs) that clearly define the analog forms. The purpose of this study is to compare, the binding capacity of soluble and insoluble PB analogs with the same CQAs (particle size/distribution and water content). Water content and particle size/particle distribution were determined by TGA, and solid-state laser diffraction particle sizing. Thallium binding studies were conducted at physiological pH to determine the maximal binding capacity (MBC) at equilibrium. Multiple linear regression and principal component analysis was also used for multivariate data analysis. Results indicate that insoluble and soluble analogs, with similar quality attributes, have nearly identical, MBC binding capacities of (441.5 mg/g) for insoluble vs soluble (458.4 mg/g). However, when both analog forms with different CQAs such as water, particle size were compared, results indicated significantly higher or lower thallium binding levels. In conclusion, it is essential that the FDA approved iron form with well-defined CQAs is used to treat thallium poisoning and radioactive thallium metal contamination for consistent therapeutic outcomes.
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Affiliation(s)
- Patrick J Faustino
- Food and Drug Administration, Center for Drug Evaluation and Research, Office of Testing and Research, Division of Product Quality Research, Life Science Building-64, 10903 New Hampshire Ave., Silver Spring, MD 20993, United States
| | - Andrew Brown
- Department of Chemistry, Texas A & M University, PO Box 30012, College Station, TX 77842, United States
| | - Bryan Lowry
- Food and Drug Administration, Center for Drug Evaluation and Research, Office of Testing and Research, Division of Product Quality Research, Life Science Building-64, 10903 New Hampshire Ave., Silver Spring, MD 20993, United States
| | - Yongsheng Yang
- Food and Drug Administration, Center for Drug Evaluation and Research, Office of Testing and Research, Division of Product Quality Research, Life Science Building-64, 10903 New Hampshire Ave., Silver Spring, MD 20993, United States
| | - Yifan Wang
- Food and Drug Administration, Center for Drug Evaluation and Research, Office of Testing and Research, Division of Product Quality Research, Life Science Building-64, 10903 New Hampshire Ave., Silver Spring, MD 20993, United States
| | - Mansoor A Khan
- Food and Drug Administration, Center for Drug Evaluation and Research, Office of Testing and Research, Division of Product Quality Research, Life Science Building-64, 10903 New Hampshire Ave., Silver Spring, MD 20993, United States; Irma Rangel College of Pharmacy, Texas A & M University, College Station, TX 77843, United States
| | - Kim R Dunbar
- Department of Chemistry, Texas A & M University, PO Box 30012, College Station, TX 77842, United States
| | - Adil Mohammad
- Food and Drug Administration, Center for Drug Evaluation and Research, Office of Testing and Research, Division of Product Quality Research, Life Science Building-64, 10903 New Hampshire Ave., Silver Spring, MD 20993, United States.
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7
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Parchur AK, Li Q, Zhou A. Near-infrared photothermal therapy of Prussian-blue-functionalized lanthanide-ion-doped inorganic/plasmonic multifunctional nanostructures for the selective targeting of HER2-expressing breast cancer cells. Biomater Sci 2016; 4:1781-1791. [DOI: 10.1039/c6bm00306k] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Multifunctional nanostructure for photothermal therapy of cancer cells.
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Affiliation(s)
- Abdul K. Parchur
- Department of Biological Engineering
- Utah State University
- Logan
- USA
| | - Qifei Li
- Department of Biological Engineering
- Utah State University
- Logan
- USA
| | - Anhong Zhou
- Department of Biological Engineering
- Utah State University
- Logan
- USA
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8
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Osorio-Rico L, Villeda-Hernández J, Santamaría A, Königsberg M, Galván-Arzate S. The N-Methyl-d-Aspartate Receptor Antagonist MK-801 Prevents Thallium-Induced Behavioral and Biochemical Alterations in the Rat Brain. Int J Toxicol 2015; 34:505-13. [DOI: 10.1177/1091581815603936] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Thallium (Tl+) is a toxic heavy metal capable of increasing oxidative damage and disrupting antioxidant defense systems. Thallium invades the brain cells through potassium channels, increasing neuronal excitability, although until now the possible role of glutamatergic transmission in this event has not been investigated. Here, we explored the possible involvement of a glutamatergic component in the Tl+-induced toxicity through the N-methyl-d-aspartate (NMDA) receptor antagonist dizocilpine (MK-801) in rats. The effects of MK-801 (1 mg/kg, intraperitoneally [ip]) on early (24 hours) motor alterations, lipid peroxidation, reduced glutathione (GSH) levels, and GSH peroxidase activity induced by Tl+ acetate (32 mg/kg, ip) were evaluated in adult rats. MK-801 attenuated the Tl+-induced hyperactivity and lipid peroxidation in the rat striatum, hippocampus and midbrain, and produced mild effects on other end points. Our findings suggest that glutamatergic transmission via NMDA receptors might be involved in the Tl+-induced altered regional brain redox activity and motor performance in rats.
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Affiliation(s)
- Laura Osorio-Rico
- Departamento de Neuroquímica, Instituto Nacional de Neurología y Neurocirugía, Mexico City, Mexico
- Doctorado en Biología Experimental, Universidad Autónoma Metropolitana-Iztapalapa, Mexico City, Mexico
- Laboratorio de Bioenergética y Envejecimiento Celular, Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, Mexico City, Mexico
| | - Juana Villeda-Hernández
- Laboratorio de Patología Experimental, Instituto Nacional de Neurología y Neurocirugía, Mexico City, Mexico
| | - Abel Santamaría
- Laboratorio de Aminoácidos Excitadores, Instituto Nacional de Neurología y Neurocirugía, Mexico City, Mexico
| | - Mina Königsberg
- Laboratorio de Bioenergética y Envejecimiento Celular, Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, Mexico City, Mexico
| | - Sonia Galván-Arzate
- Departamento de Neuroquímica, Instituto Nacional de Neurología y Neurocirugía, Mexico City, Mexico
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Abdel-Daim MM, Abdou RH. Protective Effects of Diallyl Sulfide and Curcumin Separately against Thallium-Induced Toxicity in Rats. CELL JOURNAL 2015. [PMID: 26199917 PMCID: PMC4503852 DOI: 10.22074/cellj.2016.3752] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Thallium acetate (TI) is a cumulative poison intimately accompanied by an increase in reactive oxygen species (ROS) formation that represents an important risk factor for tissue injury and malfunction. This study aims to determine the possible hepatoprotective and antioxidant effects of diallyl sulfide (DAS) from garlic and curcumin from turmeric against TI-induced liver injury and oxidative stress (OS) in rats. This in vivo animal study divided rats into six groups of 8 rats per group. The first group received saline and served as the control group. The second and third groups received DAS or curcumin only at a dose of 200 mg/kg. The fourth group received TI at a dose of 6.4 mg/kg for 5 consecutive days. The fifth and sixth groups received DAS or curcumin orally 1 hour before TI intoxication at the same dose as the second and third groups. Liver integrity serum enzymes aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), lactate dehydrogenase (LDH), and γ-glutamyltransferase (γ-GT) were evaluated. Serum and liver tissue homogenate lipid peroxidation and OS biomarkers were measured. The data were analyzed by one-way ANOVA followed by Duncan's multiple range test for post hoc analysis using SPSS version 16. TI induced marked oxidative liver damage as shown by significantly (P≤0.05) elevated serum AST, ALT, ALP, LDH and γ-GT levels. There were significant (P≤0.05) increases in serum and hepatic malondialdehyde (MDA) and serum nitric oxide (NO) as well as decreased hepatic glutathione (GSH) and catalase (CAT) activities. There were significantly (P≤0.05) less serum and hepatic superoxide dismutase (SOD) and total antioxidant capacity (TAC). Pre-treatment with DAS or curcumin ameliorated the changes in most studied biochemical parameters. DAS and curcumin effectively reduced TI-induced liver toxicity.
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Affiliation(s)
- Mohamed M Abdel-Daim
- Department of Pharmacology, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
| | - Rania H Abdou
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
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Riyaz R, Pandalai SL, Schwartz M, Kazzi ZN. A fatal case of thallium toxicity: challenges in management. J Med Toxicol 2013; 9:75-8. [PMID: 22865288 DOI: 10.1007/s13181-012-0251-1] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Thallium is a highly toxic compound and is occasionally involved in intentional overdoses or criminal poisonings. Accidental poisonings also occur, but are increasingly rare owing to restricted use and availability of thallium. We report a fatal suicidal ingestion of thallium sulfate rodenticide in which multi-dose activated charcoal (MDAC) and Prussian Blue (PB) were both used without changing the outcome. CASE REPORT A 36 year old man ingested an unknown amount of thallium sulfate grains from an old rodenticide bottle. He presented to an emergency department (ED) 45 minutes later with abdominal pain and vomiting. On examination he was agitated with a blood pressure of 141/60 mmHg and a heart rate of 146 beats per minute (bpm). He received MDAC during his initial ED management and was started on PB 18 hours post arrival; he was intubated on the following day for airway protection. The patient continued to be tachycardic and hypertensive and subsequently developed renal failure. On hospital day three, the patient developed hypotension that did not respond to fluids. The patient required vasopressors and was transferred to a tertiary care center to undergo continuous renal replacement therapy (CRRT). The patient died shortly after his transfer. His last blood thallium concentration was 5369 mcg/L, a spot urine thallium >2000 mcg/L, and a 24- hour urine thallium was >2000 mcg/L. CONCLUSION Though extremely rare, thallium intoxication can be lethal despite early administration of MDAC and use of Prussian blue therapy. Rapid initiation of hemodialysis can be considered in cases of severe thallium poisoning, to remove additional thallium, to correct acid-base disturbance, or to improve renal function.
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Affiliation(s)
- R Riyaz
- Emory University Medical Toxicology Fellowship, Atlanta, GA, USA.
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11
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Puschner B, Basso MM, Graham TW. Thallium toxicosis in a dog consequent to ingestion of Mycoplasma agar plates. J Vet Diagn Invest 2011; 24:227-30. [PMID: 22362959 DOI: 10.1177/1040638711425941] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
A 1-year-old dog ingested a mixture of blood agar and Mycoplasma agar plates. The Mycoplasma agar plates contained thallium acetate, which resulted in an estimated minimum dose of 5 mg thallium acetate/kg bodyweight. Clinical signs over the course of 2-3 weeks included vomiting, diarrhea, weight loss, alopecia, dysphonia, ataxia, paresthesia, intension tremors, megaesophagus with subsequent aspiration pneumonia, and several seizure episodes. The dog was treated with intravenous fluids and placement of a gastric feeding tube. Thallium concentrations in hair were 8.2 µg/g in samples taken on day 19, 16.4 µg/g in samples taken 3 months after exposure, 13.4 µg/g in samples taken 5 months after exposure, and nondetectable in samples taken 7 months after exposure. The blood thallium concentration was 190 µg/l on day 19 and nondetec table 3 months after exposure. Megaesophagus and dysphonia continued for 10 months after exposure. This case of thallium poisoning following ingestion of mycoplasma agar plates demonstrates that unusual sources of thallium still exist and suggests that thallium toxicosis should be included in the list of differential diagnoses in dogs presented with megaesophagus, especially if alopecia and other unexplained peripheral neuropathies are present. Hair and blood samples are useful specimens to reach an accurate diagnosis even if taken several weeks post exposure. The postexposure blood and hair thallium concentrations reported in this case are useful data for diagnosticians investigating dogs with potential thallium poisoning.
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Affiliation(s)
- Birgit Puschner
- Department of Molecular Biosciences and California Animal Health and Food Safety Laboratory, School of Veterinary Medicine, 1120 Haring Hall, Davis, CA 95616, USA.
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Montes S, Pérez-Barrón G, Rubio-Osornio M, Ríos C, Diaz-Ruíz A, Altagracia-Martínez M, Monroy-Noyola A. Additive effect of DL-penicillamine plus Prussian blue for the antidotal treatment of thallotoxicosis in rats. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2011; 32:349-355. [PMID: 22004953 DOI: 10.1016/j.etap.2011.07.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2011] [Revised: 06/22/2011] [Accepted: 07/06/2011] [Indexed: 05/31/2023]
Abstract
DL-penicillamine (DL-P) and Prussian blue (PB) given alone or in combination were tested as possible treatments against acute thallium toxicity. Rats were intoxicated by i.p. injection of thallium (I) acetate at LD(50) (32 mg/kg). A day later, pharmacological treatment was administered until day 4 as follows: (1) vehicles, (2) PB 50mg/kg, by oral route, twice a day, (3) DL-P 25mg/kg i.p. route, twice daily and (4) PB+DL-P. The Estimated Probability Survival (EPS) was recorded during the experiment for each treatment. DL-P alone did not show a significant effect on survival. However, when it was used in combination with PB, it increased the survival significantly (EPS=0.8, P<0.05) as compared to the control group (EPS=0.4). In a different experiment, using 16 mg/kg of Thallium I acetate, the metal levels were analyzed in blood, body organs and brain regions after treatments. DL-P given alone decreased slightly the thallium content in blood, organs and brain. Meanwhile, its administration in combination with PB diminished the thallium levels significantly (P<0.05) in the majority of tissues, at levels lower than those achieved in the PB group. Those results indicate that DL-P administered alone did not prevent the mortality nor accumulation of the metal in body tissues. Its combination with PB could be considered an alternative antidotal treatment in thallium toxicity, because this chelating agent given alone did not cause thallium redistribution to the brain. When given in combination with PB it has an additive effect in the treatment of acute thallotoxicosis.
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Affiliation(s)
- Sergio Montes
- Departamento de Neuroquímica, Instituto Nacional de Neurología y Neurocirugía, Manuel Velazco Suárez, SS, Av. Insurgentes Sur No. 3877, CP 14269, México, DF, México
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13
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Kiliç GA, Kutlu M. Effects of exogenous metallothionein against thallium-induced oxidative stress in rat liver. Food Chem Toxicol 2010; 48:980-7. [PMID: 20079794 DOI: 10.1016/j.fct.2010.01.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2009] [Revised: 12/30/2009] [Accepted: 01/11/2010] [Indexed: 11/26/2022]
Abstract
Metallothionein (MT) is a low-molecular weight sulfur-rich protein that plays role in metal homeostasis/detoxification and radical scavenging. The following study investigated the ability of exogenous MT to protect against oxidative damage induced by thallium (TI) in rat liver. Male Wistar rats were divided into four groups; a control and three experimental groups. The control group received physiological saline. Group 1 animals were injected with thallium acetate intraperitoneally (i.p.) at a single dose of LD(50) (32 mg/kg). In group 2 and group 3, metallothionein I was administrated once at two different doses (1 or 2.5mg/kg i.p., respectively) 1h before TI intoxication. Levels of endogenous antioxidants, oxidative stress markers were measured and histopathological examinations were performed 4 days after TI administration. TI accumulation in liver decreased related to the dose of MT. Mostly all of the alterations in the levels antioxidants restored to normal levels in MT administrated animals. H(2)O(2) levels and lipid peroxidation decreased, integrity of hepatocytes and membranous structures inside the cells were preserved. The toxic effects of TI were modulated in MT administrated animals particularly at the dose of 2.5mg/kg. These findings suggest an active role of exogenous MT against TI-induced oxidative stress in rat liver.
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Affiliation(s)
- Gözde Aydoğan Kiliç
- Faculty of Science, Department of Biology, Anadolu University, 26470 Eskişehir, Turkey.
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14
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Abstract
Of the known elements, nearly 80% are either metals or metalloids. The highly reactive nature of most metals result in their forming complexes with other compounds such oxygen, sulfide and chloride. Although this reactivity is the primary means by which they are toxic, many metals, in trace amounts, are vital to normal physiological processes; examples include iron in oxygen transport, manganese and selenium in antioxidant defense and zinc in metabolism. With these essential metals toxicity occurs when concentrations are either too low or too high. For some metals there are no physiological concentrations that are beneficial; as such these metals only have the potential to cause toxicity. This chapter focuses on four of these: arsenic, mercury, lead and thallium.
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Montes S, Soriano L, Ríos C, Monroy-Noyola A. Endogenous thiols enhance thallium toxicity. Arch Toxicol 2007; 81:683-7. [PMID: 17558498 DOI: 10.1007/s00204-007-0203-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2007] [Accepted: 03/22/2007] [Indexed: 10/23/2022]
Abstract
Either L-methionine (L-met) or L-cysteine (L-cys), given alone and in combination with Prussian blue (PB) was characterized as treatment against acute thallium (Tl) toxicity in rats. Animals were intoxicated with 32 mg/kg Tl acetate corresponding to rat LD(50). Antidotal treatments were administered during 4 days, as follows: (1) vehicle, (2) L-met 100 mg/kg i.p. twice a day, (3) L-cys 100 mg/kg i.p. twice a day, (4) PB 50 mg/kg oral, twice a day, (5) L-met + PB and (6) L-cys + PB. Mortality was as follows: control 50%; L-met 80%; L-cys 80%; PB 20%; L-met + PB 90% and L-cys + PB 100%. In a different experiment, using 16 mg/kg of Tl, tissue levels of this metal were analyzed. PB treatment statistically diminished Tl content in body organs and brain regions (P<0.01). Whereas, separate treatments of L-met and L-cys failed to decrease Tl content in organs and brain regions; while its administration in combination with PB (L-met + PB and L-cys + PB groups) lowered Tl levels in body organs in the same extent as PB group. Results indicate that L-met and L-cys administered alone or in combination with PB should not be considered suitable treatments against acute Tl toxic effects because this strategy failed to prevent mortality and Tl accumulation in brain.
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Affiliation(s)
- Sergio Montes
- Departamento de Neuroquímica, Instituto Nacional de Neurología y Neurocirugía, Manuel Velasco Suárez, Av. Insurgentes Sur No. 3877, C.P. 14269, México, D.F, México
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Ibrahim D, Froberg B, Wolf A, Rusyniak DE. Heavy Metal Poisoning: Clinical Presentations and Pathophysiology. Clin Lab Med 2006; 26:67-97, viii. [PMID: 16567226 DOI: 10.1016/j.cll.2006.02.003] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Humans have had a long and tumultuous relationship with heavy metals. Their ubiquitous nature and our reliance on them for manufacturing have resulted at times in exposures sufficient to cause systemic toxicity. Their easy acquisition and potent toxicity have also made them popular choices for criminal poisonings. This article examines the clinical manifestation and pathophysiology of poisoning from lead, mercury, arsenic, and thallium.
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Affiliation(s)
- Danyal Ibrahim
- Department of Emergency Medicine, Division of Medical Toxicology, Indiana University School of Medicine, 1050 Wishard Boulevard, Room 2200, Indianapolis, IN 46202, USA
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Thompson DF, Callen ED. Soluble or Insoluble Prussian Blue for Radiocesium and Thallium Poisoning? Ann Pharmacother 2004; 38:1509-14. [PMID: 15252192 DOI: 10.1345/aph.1e024] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVE: To review the available English-language literature concerning the efficacy of soluble and insoluble Prussian blue used as a therapeutic agent in radiocesium and thallium poisoning. DATA SOURCES: A thorough search of MEDLINE, Toxline, and EMBASE databases (1960s-August 2003) was performed. Search terms included Prussian blue, thallium, and radiocesium poisoning. Bibliographies of relevant papers were reviewed for additional citations. STUDY SELECTION AND DATA EXTRACTION: Reports and studies of human trials and cases, along with animal and relevant in vitro data, were sought. Data were categorized as insoluble and soluble Prussian blue and by thallium and radiocesium poisoning. DATA SYNTHESIS: The majority of evidence describing the efficacy of Prussian blue for radiocesium poisoning is based on the use of the insoluble form. In contrast, the majority of data supporting the efficacy of Prussian blue in thallium poisoning involves the use of the soluble form. CONCLUSIONS: Insoluble Prussian blue has recently been approved in the US for treatment of both thallium and radiocesium poisoning. While there is sufficient evidence that the insoluble form of Prussian blue is effective in radiocesium poisoning, there is a paucity of analogous data supporting its use in thallium poisoning. Whether the physicochemical differences between soluble and insoluble Prussian blue have any effect on outcomes in human poisoning is not known.
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Affiliation(s)
- Dennis F Thompson
- Department of Pharmacy Practice, College of Pharmacy, Southwestern Oklahoma State University, Weatherford, OK 73102-1080, USA.
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18
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Abstract
Thallium salts have been used as medicinal agents, as key ingredients in a variety of manufacturing processes, and as a potent rodenticide. Additionally, environmental concerns are growing, as thallium is a waste product of coal combustion and the manufacturing of cement. Thallium salts are rapidly and nearly completely absorbed by virtually all routes, with gastrointestinal exposure being the most common route to produce toxicity. Thallium enters cells by a unique process governed by its similarity in charge and ionic radius to potassium. Although the exact mechanism of toxicity has not been established, thallium interferes with energy production at essential steps in glycolysis, the Krebs cycle, and oxidative phosphorylation. Additional effects include inhibition of sodium-potassium-adenosine triphosphatase and binding to sulfhydryl groups. The major manifestations of toxicity consist of a rapidly progressive, ascending, extremely painful sensory neuropathy and alopecia. Unlike exposure to most metal salts, gastrointestinal symptoms of thallium toxicity are relatively minor, and constipation is more characteristic than diarrhoea. Many other findings such as an autonomic neuropathy, cranial nerve abnormalities, altered mental status, motor weakness, cardiac, hepatic, and renal effects are described, but are less specific. Thallium also crosses the placenta freely and produces abnormalities in animals as well as fetal demise, overt toxicity and congenital abnormalities in humans. There are no controlled trials of treatments in thallium-poisoned patients. Thus, the literature is predominated by very small animal studies and case reports with very limited data. Strong evidence speaks against the use of traditional metal chelators such as dimercaprol (British Anti-Lewisite) and penicillamine, and the latter may cause redistribution of thallium into the central nervous system. Likewise, forced potassium diuresis appears harmful. The use of single- or multiple-dose activated charcoal is supported by in vitro binding experiments and some animal data, and charcoal haemoperfusion may be a useful adjunct. Multiple animal studies give evidence for enhanced elimination and improved survival with Prussian blue. Unfortunately, despite the fact that many humans have been treated with Prussian blue, the data presented are insufficient to comment definitively on its efficacy. However, Prussian blue's safety profile is superior to that of other proposed therapies and it should be considered the drug of choice in acute thallium poisoning. Public health efforts should focus on greater restrictions on access to, and use of, thallium salts.
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Rusyniak DE, Kao LW, Nanagas KA, Kirk MA, Furbee RB, Brizendine EJ, Wilmot PE. Dimercaptosuccinic acid and Prussian Blue in the treatment of acute thallium poisoning in rats. JOURNAL OF TOXICOLOGY. CLINICAL TOXICOLOGY 2003; 41:137-42. [PMID: 12733851 DOI: 10.1081/clt-120019129] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
INTRODUCTION Despite being banned as a pesticide, thallium still results in human and animal poisonings. Current recommended treatments include the use of the chemical Prussian Blue. Limitations in its availability may result in Prussian Blue not being obtainable in the thallium-poisoned patient. The chelator 2,3-Dimercaptosuccinic acid (DMSA) is currently FDA-approved for use in childhood lead poisoning and has been reported to be beneficial in treating other heavy metal poisonings. The objective of this study was to determine the efficacy of DMSA as a treatment for thallium poisoning by studying mortality and whole-brain concentrations in thallium poisoned rats. MATERIAL AND METHODS Rats were gavaged with 30 mg/kg of thallium. After 24 hours they were randomized to DMSA (n = 20) 50 mg/kg twice daily for 5 days, Prussian Blue (n = 20) 50 mg/kg twice daily for 5 days, or control (n = 30). Animals were monitored twice daily for weight loss and mortality. Animals losing greater than 20% of their starting weight were euthanized and counted as a mortality. All surviving rats at 120 hours had their brains harvested and digested and underwent subsequent thallium analysis. RESULTS The rate of survival in DMSA-treated animals compared to control was 45% vs. 21%, p = 0.07. Mean whole-brain thallium concentrations between DMSA and control rats were 3.4 vs. 3.0 microg/g, p = 0.06. Prussian Blue-treated rats had significantly improved survival (70% vs. 21%, p < 0.01) and lower whole-brain thallium concentrations (1.6 vs. 3.0 microg/g, p < 0.01 tissue) compared to controls. CONCLUSION DMSA failed to reduce brain thallium concentrations in rats poisoned with thallium and had an indeterminate effect on mortality while Prussian Blue significantly reduces both brain thallium concentrations and mortality.
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Affiliation(s)
- Daniel E Rusyniak
- Department of Emergency Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA.
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20
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Abstract
Thallium and arsenic have been used as a means of criminal poisoning. Although both manifest characteristically with peripheral neuropathies, thallium is associated with alopecia and arsenic with gastrointestinal symptoms. We describe the symptoms, physical findings, diagnostic test results, and outcomes in a group of men poisoned with thallium and arsenic. Seven patients had evidence of elevated thallium levels, and 2 patients had elevated arsenic and thallium levels. The most commonly reported symptoms included myalgias, arthralgias, paresthesias, and dysesthesias. Five patients developed alopecia. All patients with symptoms and peripheral neuropathies had characteristic blackening of their hair roots. Initially treated with dimercaptosuccinic acid, patients were switched to multiple-dose activated charcoal after testing revealed thallium poisoning. By 6 months, all patients' symptoms and peripheral neuropathies improved, but 5 patients had ongoing psychiatric problems. Thallium remains a means of criminal poisoning and should be considered in any patient with a rapidly progressing peripheral neuropathy with or without alopecia.
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Affiliation(s)
- Daniel E Rusyniak
- Department of Emergency Medicine and Division of Medical Toxicology, Indiana University School of Medicine, Indianapolis, IN, USA.
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Galván-Arzate S, Martínez A, Medina E, Santamaría A, Ríos C. Subchronic administration of sublethal doses of thallium to rats: effects on distribution and lipid peroxidation in brain regions. Toxicol Lett 2000; 116:37-43. [PMID: 10906420 DOI: 10.1016/s0378-4274(00)00200-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Occupational exposure to thallium (Tl+) is known to be responsible for severe neurological manifestations in humans, including ataxia and paralysis; however, little is known yet about the precise mechanism of toxicity elicited by this heavy metal at sublethal doses and its brain distribution after chronic or subchronic exposures resulting from environmental contamination. In order to evaluate the levels of Tl in rat brain regions after a subchronic administration (30 days) of sublethal doses of Tl (I) acetate: 0.8 mg/kg (1/40 of LD(50)), 1.6 mg/kg (1/20 of LD(50)), we measured the concentrations of Tl by atomic absorption spectrophotometry. A possible role of oxidative injury in the pattern of toxicity exerted by Tl in the same brain regions, was also studied. Lipid peroxidation (LP) as a current marker of oxidative stress, was estimated by the generation of lipid fluorescent products. Higher concentrations of Tl were observed in brain tissue from adult rats treated with 1.6 mg/kg, as compared to those treated with 0.8 mg/kg. However, no differential distribution of Tl among regions was observed after administration of 0.8 mg/kg dose to rats, nor after 1. 6 mg/kg dose. We also found significant changes in LP both in corpus striatum and cerebellum from rats treated daily with 0.8 mg/kg Tl, whereas all regions from rats treated with 1.6 mg/kg Tl exhibited enhanced LP as compared to control. These findings suggest an active role of free radicals and oxidative events involved in the pattern of toxicity after exposure to sublethal doses of Tl, which are associated with regional susceptibility of the brain to this metal.
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Affiliation(s)
- S Galván-Arzate
- Department of Neurochemistry, National Institute of Neurology and Neurosurgery Manuel Velasco Suárez, D. F. 14269, México
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22
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Leung KM, Ooi VE. Studies on thallium toxicity, its tissue distribution and histopathological effects in rats. CHEMOSPHERE 2000; 41:155-159. [PMID: 10819194 DOI: 10.1016/s0045-6535(99)00404-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The distribution of thallium (Tl) in the body and its toxic effect on the histology and function of the liver and kidney of rats after Tl administration were investigated using biochemical and histopathological assays. Male albino rats exhibited a markedly dose-dependent increase in the serum levels of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) at 16 h after an intraperitoneal injection of 30, 60 or 120 mg/kg Tl. The serum level of creatinine in the rats injected with 30 mg/kg Tl, elevated significantly after 4 days of administration. The distribution of Tl in the tissues of intoxicated rats was uneven. The content of Tl was found to be highest in the kidney, followed by ileum, stomach and liver. Histological examination demonstrated frequent occurrence of hepatocyte necrosis and vacuolation in the liver and pathological changes of renal tubules in the treated rats.
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Affiliation(s)
- K M Leung
- Department of Biology, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong SAR, People's Republic of China
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23
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Hoffman RS, Stringer JA, Feinberg RS, Goldfrank LR. Comparative efficacy of thallium adsorption by activated charcoal, prussian blue, and sodium polystyrene sulfonate. JOURNAL OF TOXICOLOGY. CLINICAL TOXICOLOGY 2000; 37:833-7. [PMID: 10630266 DOI: 10.1081/clt-100102462] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Although Prussian blue is considered the antidote of choice for thallium poisoning, the lack of a Food and Drug Administration-approved pharmaceutical formulation has led to the search for other adsorbents. Activated charcoal has been demonstrated to adsorb thallium in vitro, and the similarity between thallium and potassium has led some authors to consider the use of sodium polystyrene sulfonate as a potential adsorbent. This experiment was designed to compare the relative thallium binding efficacy of these agents in a standard isotherm model. METHODS A standard aqueous solution of thallium acetate buffered to pH 7.0 was agitated at 25 degrees C with activated charcoal, Prussian blue, or sodium polystyrene sulfonate at adsorbent:thallium ratios ranging from 1.5:1 to 100:1. In order to further simulate physiologic conditions, all trials were repeated in a solution containing 4 mmol/L potassium phosphate. After thorough agitation, the mixtures were allowed to settle and were centrifuged and filtered through a 0.22-micron filter. Supernatant thallium concentrations were measured by atomic absorption spectrophotometry. Langmuir isotherms were used to calculate the maximal adsorptive capacity of each adsorbent, using linear regression with Pearson's correlation coefficients (r). Maximal adsorptive capacities were compared statistically with a p < 0.05 considered significant. RESULTS The maximal adsorptive capacities defined as milligrams of thallium per gram of adsorbent (shown with linear regression p and r values) were as follows: activated charcoal, 59.7 mg/g (p = 0.005, r = 0.995); Prussian blue, 72.7 mg/g (p = 0.004, r = 0.996); and sodium polystyrene sulfonate, 713 mg/g (p = 0.049, r = 0.951). All three values were statistically different from each other. At a physiologic potassium concentration, the maximal adsorptive capacities for activated charcoal and Prussian blue were essentially unchanged (58.3 mg/g and 69.8 mg/g, respectively, p > 0.05 for each vs trials without potassium), while the maximal adsorptive capacity for sodium polystyrene sulfonate fell to 39.1 mg/g (p = 0.003, r = 0.997, p = 0.005 vs sodium polystyrene sulfonate without potassium). CONCLUSIONS This in vitro study confirms the utility of Prussian blue and activated charcoal as thallium adsorbents. Although sodium polystyrene sulfonate demonstrates exceptional in vitro adsorption of thallium, its greater affinity for potassium probably renders it clinically ineffective.
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Affiliation(s)
- R S Hoffman
- New York City Poison Control Center, New York University School of Medicine 10016, USA.
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24
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Andersen O. Principles and recent developments in chelation treatment of metal intoxication. Chem Rev 1999; 99:2683-710. [PMID: 11749497 DOI: 10.1021/cr980453a] [Citation(s) in RCA: 283] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- O Andersen
- Department of Life Sciences and Chemistry, Roskilde University, Postbox 260 4000, Roskilde, Denmark
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Abstract
Thallium (T1+) is a toxic heavy metal which was accidentally discovered by Sir William Crookes in 1861 by burning the dust from a sulfuric acid industrial plant. He observed a bright green spectral band that quickly disappeared. Crookes named the new element 'Thallium' (after thallos meaning young shoot). In 1862, Lamy described the same spectral line and studied both the physical and chemical properties of this new element (Prick, J.J.G., 1979. Thallium poisoning. In: Vinkrn, P.J., Bruyn, G.W. (Eds.), Intoxication of the Nervous System, Handbook of Clinical Neurology, vol. 36. North-Holland, New York. pp. 239-278).
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Affiliation(s)
- S Galván-Arzate
- Department of Neurochemistry, National Institute of Neurology and Neurosurgery, Mexico, DF, Mexico.
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Meggs WJ, Cahill-Morasco R, Shih RD, Goldfrank LR, Hoffman RS. Effects of Prussian blue and N-acetylcysteine on thallium toxicity in mice. JOURNAL OF TOXICOLOGY. CLINICAL TOXICOLOGY 1997; 35:163-6. [PMID: 9120885 DOI: 10.3109/15563659709001187] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Thallium poisoning is now rare but still occurs as a result of homicide attempts. Prussian blue's efficacy in the treatment of experimental thallium poisoning has been demonstrated in animal models, and its use in humans is supported by anecdotal data. Since thallium binds sulfhydryl groups, the use of N-acetylcysteine is also considered as a potential antidote. STUDY OBJECTIVE To compare the efficacy of Prussian blue and N-acetylcysteine in a murine model of thallium poisoning. METHODS Female Swiss albino mice with free access to food and water were used. Two study doses of thallium, given as a subcutaneous injection of thallium acetate dissolved in sterile water, were chosen: 70 mg/kg (LD90) and 85 mg/kg (> LD100). A randomized, placebo controlled study was conducted with survival at 120 h chosen as the outcome measure. Four treatment groups were studied: control, Prussian blue, N-acetylcysteine, and the combination of Prussian blue and N-acetylcysteine. Prussian blue was dissolved in water and given by oral gavage at a dose of 50 mg/kg. N-acetylcysteine was diluted in normal saline and given as intraperitoneal injections of 200 mg/kg. Sterile water by gavage and normal saline by peritoneal injection were given as control treatments whenever an active agent was not given. Survival was recorded over a 120 h study period and compared at 120 h by a Fisher's exact test. RESULTS At 120 h following subcutaneous injection of thallium 70 mg/kg, only 10% of the control animals survived. Treatment with N-acetylcysteine or Prussian blue increased survival to 35% (p = 0.13) and 50% (p = 0.014), respectively. The addition of N-acetylcysteine to Prussian blue offered no benefit over Prussian blue therapy alone. CONCLUSIONS Prussian blue was found to decrease mortality from thallium poisoning at a dose equal to the LD90 in this model, but not a dose greater than the LD100. No role for N-acetylcysteine in the treatment of thallium poisoning was demonstrated by this study.
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Affiliation(s)
- W J Meggs
- New York City Poison Control Center, USA
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Osorio-Rico L, Galván-Arzate S, Ríos C. Thallium increases monoamine oxidase activity and serotonin turnover rate in rat brain regions. Neurotoxicol Teratol 1995; 17:1-5. [PMID: 7535889 DOI: 10.1016/0892-0362(94)00047-h] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The effect of thallium acetate administration on monoaminergic pathways was studied in male Wistar rats using 30 mg/kg and 50 mg/kg acute IP doses. We found that thallium activated both monoamine oxidase (MAO) activity and serotonin turnover rate in rat brain regions, that may contribute to the neuronal damage mechanism of the agent. MAO activity in midbrain and pons was increased at both doses (at 30 mg/kg dose by 27.7% and 37%; at 50 mg/kg dose by 48% and 47%, respectively vs. control group). Serotonin turnover rate in pons was also increased at the 30 mg/kg dose (172%) while midbrain and pons serotonin turnover was increased only at the 50 mg/kg dose (56% and 166%, respectively vs. control group). Dopamine turnover rate was not significantly changed. The results indicate that thallium induced a significant increase in pons and midbrain MAO activity and also in serotonin turnover rate as compared with control animals, and this could led to behavioral and toxic alterations in the rats intoxicated with thallium.
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Affiliation(s)
- L Osorio-Rico
- Departamento de Neuroquímica, Instituto Nacional de Neurología y Neurocirugía, México, D.F
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Barroso-Moguel R, Villeda-Hernández J, Méndez-Armenta M, Ríos C, Monroy-Noyola A. Combined D-penicillamine and prussian blue as antidotal treatment against thallotoxicosis in rats: evaluation of cerebellar lesions. Toxicology 1994; 89:15-24. [PMID: 8178320 DOI: 10.1016/0300-483x(94)90129-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Rats were treated with a single dose of thallium acetate (32 mg/kg i.p.) and the antidotal effect of D-penicillamine and prussian blue given alone or in combination was assessed by means of evaluation of the thallium-induced cerebellar histological lesions. After thallium poisoning (24 h), antidotes were administered for 4 days as follows: D-penicillamine (DP) 25 mg/kg, i.p. twice daily; prussian blue (PB), 50 mg/kg p.o., twice daily. Mortality among the treatment groups was as follows: control, 87.5%; DP, 100%; PB, 56.25%; DP+PB, 25%. Three days after these treatments, rats treated with the combination DP+PB presented a significantly lower number of altered Purkinje cells in cerebellum as compared with those of the thallium alone treated animals, indicating adequate protection by this antidote treatment against thallium neurotoxicity. Prussian blue protected against thallium-induced neurotoxicity to a lesser extent as compared with the effects obtained by the DP+PB protection. DP did not protect against thallium-induced alterations of Purkinje cells. These results confirm the efficacy of the combined antidotal treatment of DP and PB against thallium toxicity in rats, and support the possible application in human cases of thallotoxicosis.
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Affiliation(s)
- R Barroso-Moguel
- Laboratorio de Neuromorfología Celular, Instituto Nacional de Neurología y Neurocirugía, SSA, México, D.F., México
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Meggs WJ, Hoffman RS, Shih RD, Weisman RS, Goldfrank LR. Thallium poisoning from maliciously contaminated food. JOURNAL OF TOXICOLOGY. CLINICAL TOXICOLOGY 1994; 32:723-30. [PMID: 7966530 DOI: 10.3109/15563659409017979] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Four young adults presented two days after one of them had received marzipan balls packaged in a box from an expensive candy manufacturer. Two ate one candy ball, while two others shared a third. The next day, variable gastrointestinal symptoms developed. On the third day, two patients developed painful paresthesiae of the hands and feet, an early but nonspecific clinical marker of thallium poisoning. A tentative diagnosis of thallium poisoning was made based on symptoms, and treatment was initiated. The remaining candies were radiographed. Metallic densities in the candies supported the diagnosis, and atomic absorption spectroscopy was used to quantitate thallium content. Each candy contained a potentially fatal dose. Five to seven days later, hypertension and tachycardia developed in the two patients who had ingested an entire candy. All patients developed alopecia but recovered without overt neurologic or other sequelae. While the diagnosis of thallium poisoning is often delayed until alopecia develops, an early diagnosis favors an effective treatment strategy.
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Affiliation(s)
- W J Meggs
- New York City Poison Center, New York 10016
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Kravzov J, Rios C, Altagracia M, Monroy-Noyola A, López F. Relationship between physicochemical properties of prussian blue and its efficacy as antidote against thallium poisoning. J Appl Toxicol 1993; 13:213-6. [PMID: 8326092 DOI: 10.1002/jat.2550130313] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
In the present work we established a relationship between some physicochemical properties of two different batches of Prussian blue (PB) and their in vivo efficacy as an antidote against thallium poisoning. The physicochemical properties studied were crystallite size and thallium-adsorbing capacity. One of the batches was synthesized and the other was obtained from commercial sources. The synthesized PB batch with the smallest crystallite size had both the highest adsorption capacity and antidotal efficacy. Synthesized PB protected 100% of the animals against one LD50 thallium dose, whereas the commercial PB batch protected only 80%. Thallium content in blood and tissues (liver, kidney, brain) was also analysed after antidotal PB treatment in rats previously intoxicated with a sublethal dose of T1+. Animals treated with synthesized PB showed significantly less thallium in blood and tissue contents than those values of commercial PB-treated rats, indicating better antidotal properties of the synthesized PB. According to the present study we suggest an in vivo evaluation of the compound before distribution of the product to toxicological units, if X-ray diffractometric analysis is not available, in order to identify and determine the crystallite size of the compound as it plays an important role in the efficacy of PB.
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Affiliation(s)
- J Kravzov
- Universidad Autónoma Metropolitana-Xochimilco, Departamento de Sistemas Biológicos-DCBS, México, D.F
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