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Grémy O, Devilliers K, Miccoli L. Chelation therapy with 3,4,3-Li(1,2-HOPO) after pulmonary exposure to plutonium in rats. Chem Biol Interact 2023; 378:110488. [PMID: 37054935 DOI: 10.1016/j.cbi.2023.110488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 04/04/2023] [Accepted: 04/11/2023] [Indexed: 04/15/2023]
Abstract
Internal exposure to plutonium can occur through inhalation for the nuclear worker, but also for the public if the radionuclide was released into the atmosphere in the context of a nuclear accident or terrorist attack. DieThylenetriaminePentaAcetic acid (DTPA) is currently still the only authorized chelator that can be used to decorporate internalized plutonium. The Linear HydrOxyPyridinOne-based ligand named 3,4,3-Li(1,2-HOPO) remains the most promising drug candidate to replace it in the hopes of improving chelating treatment. This study aimed to assess the efficacy of 3,4,3-Li(1,2-HOPO) in removing plutonium from rats exposed to the lungs, depending on the timing and route of treatment, and almost always compared to DTPA at a ten-fold higher dose used as a reference chelator. First, early intravenous injection or inhalation of 3,4,3-Li(1,2-HOPO) demonstrated superior efficacy over DTPA in preventing plutonium accumulation in liver and bone in rats exposed by injection or lung intubation. However, this superiority of 3,4,3-Li(1,2-HOPO) was much less pronounced with delayed treatment. In rats given plutonium in the lungs, the experiments also showed that 3,4,3-Li-HOPO reduced pulmonary retention of plutonium more effectively than DTPA only when the chelators were injected early but not at delayed times, while it was always the better of the two chelators when they were inhaled. Under our experimental conditions, the rapid oral administration of 3,4,3-Li(1,2-HOPO) was successful in preventing systemic accumulation of plutonium, but not in decreasing lung retention. Thus, after exposure to plutonium by inhalation, the best emergency treatment would be the rapid inhalation of a 3,4,3-Li(1,2-HOPO) aerosol to limit pulmonary retention of plutonium and prevent extrapulmonary deposition of plutonium in target systemic tissues.
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Affiliation(s)
- Olivier Grémy
- Laboratoire de RadioToxicologie, Commissariat à l'Energie Atomique et aux Energies Alternatives, Université de Paris-Saclay, Bruyères-le-Châtel, France.
| | - Karine Devilliers
- Laboratoire de RadioToxicologie, Commissariat à l'Energie Atomique et aux Energies Alternatives, Université de Paris-Saclay, Bruyères-le-Châtel, France
| | - Laurent Miccoli
- Laboratoire de RadioToxicologie, Commissariat à l'Energie Atomique et aux Energies Alternatives, Université de Paris-Saclay, Bruyères-le-Châtel, France
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2
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Wang X, Shi C, Guan J, Chen Y, Xu Y, Diwu J, Wang S. The development of molecular and nano actinide decorporation agents. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.04.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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3
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Fan D, Fang Q. Siderophores for medical applications: Imaging, sensors, and therapeutics. Int J Pharm 2021; 597:120306. [PMID: 33540031 DOI: 10.1016/j.ijpharm.2021.120306] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 01/07/2023]
Abstract
Siderophores are low-molecular-weight chelators produced by microorganisms to scavenge iron from the environment and deliver it to cells via specific receptors. Tremendous researches on the molecular basis of siderophore regulation, synthesis, secretion, and uptake have inspired their diverse applications in the medical field. Replacing iron with radionuclides in siderophores, such as the most prominent Ga-68 for positron emission tomography (PET), carves out ways for targeted imaging of infectious diseases and cancers. Additionally, the high affinity of siderophores for metal ions or microorganisms makes them a potent detecting moiety in sensors that can be used for diagnosis. As for therapeutics, the notable Trojan horse-inspired siderophore-antibiotic conjugates demonstrate enhanced toxicity against multi-drug resistant (MDR) pathogens. Besides, siderophores can tackle iron overload diseases and, when combined with moieties such as hydrogels and nanoparticles, a wide spectrum of iron-induced diseases and even cancers. In this review, we briefly outline the related mechanisms, before summarizing the siderophore-based applications in imaging, sensors, and therapeutics.
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Affiliation(s)
- Di Fan
- Laboratory of Theoretical and Computational Nanoscience, CAS Key Laboratory of Nanophotonic Materials and Devices, CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Ambient Particles Health Effects and Prevention Techniques, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, PR China
| | - Qiaojun Fang
- Laboratory of Theoretical and Computational Nanoscience, CAS Key Laboratory of Nanophotonic Materials and Devices, CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Ambient Particles Health Effects and Prevention Techniques, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, PR China; Sino-Danish Center for Education and Research, Beijing 101408, PR China.
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4
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Chen L, Bai R, Wang X, Zhang Y, He L, Zhang M, Chong Y, Chai Z, Wang XF, Diwu J. Amidoxime-Functionalized Covalent Organic Nanosheets for Sequestration of Uranium In Vivo. ACS APPLIED BIO MATERIALS 2020; 3:8731-8738. [PMID: 35019644 DOI: 10.1021/acsabm.0c01122] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Finding efficient actinide decorporation agents is crucial for public health and the development of the nuclear industry. The current inventory of decorporation agents is predominately limited to a handful of ligands. In this work, a two-dimensional (2D) covalent organic nanosheet (CON) material was rationally designed and tested for in vivo uranium decorporation. This material is extensively grafted with amidoxime (AO), a classic uranium-recognition ligand, which not only provides selective binding sites for uranyl but also expands the interlayer spacing of CON, making the active sites more accessible. Significantly, the results of in vivo experiments demonstrate that, in both prophylactic and prompt administration groups, CON-AO exhibits a higher excretion ratio of uranium from kidneys than that of ZnNa3-diethylenetriamine pentaacetate (DTPA), while presenting a similar level of cytotoxicity. These results suggest that functionalized CONs may emerge as a promising type of actinide in vivo decorporation agent.
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Affiliation(s)
- Long Chen
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, P. R. China
| | - Ru Bai
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, P. R. China.,School of Chemistry and Chemical Engineering, and Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang 421001, P. R. China
| | - Xiaomei Wang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, P. R. China
| | - Yijing Zhang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, P. R. China
| | - Linwei He
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, P. R. China
| | - Mingxing Zhang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, P. R. China
| | - Yu Chong
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, P. R. China
| | - Zhifang Chai
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, P. R. China
| | - Xiao-Feng Wang
- School of Chemistry and Chemical Engineering, and Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang 421001, P. R. China
| | - Juan Diwu
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, P. R. China
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Fattal E, Tsapis N, Phan G. Novel drug delivery systems for actinides (uranium and plutonium) decontamination agents. Adv Drug Deliv Rev 2015; 90:40-54. [PMID: 26144994 DOI: 10.1016/j.addr.2015.06.009] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 06/18/2015] [Accepted: 06/24/2015] [Indexed: 12/17/2022]
Abstract
The possibility of accidents in the nuclear industry or of nuclear terrorist attacks makes the development of new decontamination strategies crucial. Among radionuclides, actinides such as uranium and plutonium and their different isotopes are considered as the most dangerous contaminants, plutonium displaying mostly a radiological toxicity whereas uranium exhibits mainly a chemical toxicity. Contamination occurs through ingestion, skin or lung exposure with subsequent absorption and distribution of the radionuclides to different tissues where they induce damaging effects. Different chelating agents have been synthesized but their efficacy is limited by their low tissue specificity and high toxicity. For these reasons, several groups have developed smart delivery systems to increase the local concentration of the chelating agent or to improve its biodistribution. The aim of this review is to highlight these strategies.
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Choi TA, Endsley AN, Bunin DI, Colas C, An DD, Morales-Rivera JA, Villalobos JA, Shinn WM, Dabbs JE, Chang PY, Abergel RJ. Biodistribution of the Multidentate Hydroxypyridinonate Ligand [14C]-3,4,3-LI(1,2-HOPO), a Potent Actinide Decorporation Agent. Drug Dev Res 2015; 76:107-22. [DOI: 10.1002/ddr.21246] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Accepted: 02/17/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Taylor A. Choi
- Chemical Sciences Division; Lawrence Berkeley National Laboratory; Berkeley CA USA
| | | | | | | | - Dahlia D. An
- Chemical Sciences Division; Lawrence Berkeley National Laboratory; Berkeley CA USA
| | | | | | | | - Jack E. Dabbs
- Biosciences Division; SRI International; Menlo Park CA USA
| | - Polly Y. Chang
- Biosciences Division; SRI International; Menlo Park CA USA
| | - Rebecca J. Abergel
- Chemical Sciences Division; Lawrence Berkeley National Laboratory; Berkeley CA USA
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Wilson JP, Cobb RR, Dungan NW, Matthews LL, Eppler B, Aiello KV, Curtis S, Boger T, Guilmette RA, Weber W, Doyle-Eisele M, Talton JD. Decorporation of systemically distributed americium by a novel orally administered diethylenetriaminepentaacetic acid (DTPA) formulation in beagle dogs. HEALTH PHYSICS 2015; 108:308-318. [PMID: 25627942 DOI: 10.1097/hp.0000000000000199] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Novel decorporation agents are being developed to protect against radiological accidents and terrorists attacks. Radioactive americium is a significant component of nuclear fallout. Removal of large radioactive materials, such as 241Am, from exposed persons is a subject of significant interest due to the hazards they pose. The objective of this study was to evaluate the dose-related efficacy of daily doses of NanoDTPA™ Capsules for decorporating Am administered intravenously as a soluble citrate complex to male and female beagle dogs. In addition, the efficacy of the NanoDTPA™ Capsules for decorporating 241Am was directly compared to intravenously administered saline and DTPA. Animals received a single IV administration of 241Am(III)-citrate on Day 0. One day after radionuclide administration, one of four different doses of NanoDTPA™ Capsules [1, 2, or 6 capsules d(-1) (30 mg, 60 mg, or 180 mg DTPA) or 2 capsules BID], IV Zn-DTPA (5 mg kg(-1) pentetate zinc trisodium) as a positive control, or IV saline as a placebo were administered. NanoDTPA™ Capsules, IV Zn-DTPA, or IV saline was administered on study days 1-14. Animals were euthanized on day 21. A full necropsy was conducted, and liver, spleen, kidneys, lungs and trachea, tracheobronchial lymph nodes (TBLN), muscle samples (right and left quadriceps), gastrointestinal (GI) tract (stomach plus esophagus, upper and lower intestine), gonads, two femurs, lumbar vertebrae (L1-L4), and all other soft tissue remains were collected. Urinary and fecal excretion profiles were increased approximately 10-fold compared to those for untreated animals. Tissue contents were decreased compared to untreated controls. In particular, liver content was decreased by approximately eightfold compared to untreated animals. The results from this study further demonstrate that oral NanoDTPA™ Capsules are equally efficient compared to IV Zn-DTPA in decorporation of actinides.
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Affiliation(s)
- James P Wilson
- *Nanotherapeutics, Inc., Alachua, FL 32615; †Lovelace Biomedical and Environmental Research Institute, Albuquerque, NM
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8
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Bunin DI, Chang PY, Doppalapudi RS, Riccio ES, An D, Jarvis EE, Kullgren B, Abergel RJ. Dose-dependent efficacy and safety toxicology of hydroxypyridinonate actinide decorporation agents in rodents: towards a safe and effective human dosing regimen. Radiat Res 2013; 179:171-82. [PMID: 23289385 DOI: 10.1667/rr3115.1] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Two hydroxypyridinone-containing actinide decorporation agents, 3,4,3-LI(1,2-HOPO) and 5-LIO(Me-3,2-HOPO), are being developed for the treatment of internal actinide contamination by chelation therapy. Dose-response efficacy profiles in mice were established for the removal of intravenously injected (238)Pu and (241)Am after parenteral and oral treatment with these chelators. In both cases, presumed efficacious doses promoted substantially greater actinide elimination rates than the currently approved agent, diethylenetriamine-pentaacetic acid, considering two different interspecies scaling methods for the conversion of human doses to equivalent rodent dose levels. In addition, genotoxicity of both ligands was assessed using the Salmonella/ Escherichia coli /microsome plate incorporation test and the Chinese hamster ovary cell chromosome aberration assay, showing that neither ligand is genotoxic, in the presence and absence of metabolic activation. Finally, maximum tolerated dose studies were performed in rats for seven consecutive daily oral administrations with the chelators, confirming the safety of the presumed efficacious doses for 3,4,3-LI(1,2-HOPO) and 5-LIO(Me-3,2-HOPO). The results of these studies add to the growing body of evidence that both decorporation agents have remarkable decorporation efficacy properties and promising safety toxicology profiles. These results are necessary components of the regulatory approval process and will help determine the optimal human dosing regimens for the treatment of internal radionuclide contamination.
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Affiliation(s)
- Deborah I Bunin
- Biosciences Division, SRI International, Menlo Park, California 94025M, USA
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9
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Gok C, Gerstmann U, Höllriegl V, Aytas S. Preparation of Ca-alginate biopolymer beads and investigation of their decorporation characteristics for 85Sr, 238U and 234Th by in vitro experiments. RADIATION PROTECTION DOSIMETRY 2013; 153:47-55. [PMID: 22648239 DOI: 10.1093/rpd/ncs088] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The aim of this work was to investigate whether Ca-alginate biopolymer beads (CaABBs) can be used to reduce the bioavailability of radionuclides in the gastrointestinal tract of humans. The uptake of strontium, uranium and thorium from a simulated gastrointestinal system was studied by in vitro techniques using CaABBs. This agent was prepared from Na-alginate through cross-linking with divalent calcium ions according to the egg-box model. The effects of process variables such as pH of the gastrointestinal juice, incubation time and solid-to-solution ratio for the removal of radionuclides from the gastrointestinal juice were investigated. The results suggest that CaABBs are a potent material for reducing the bioavailability of radionuclides with a high uptake efficiency in the gastrointestinal tract.
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Affiliation(s)
- Cem Gok
- Helmholtz-Zentrum München, German Research Center for Environmental Health, Institute of Radiation Protection, Neuherberg, Germany.
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10
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Reddy JD, Cobb RR, Dungan NW, Matthews LL, Aiello KV, Ritter G, Eppler B, Kirk JF, Abernethy JA, Tomisaka DM, Talton JD. Preclinical Toxicology, Pharmacology, and Efficacy of a Novel Orally Administered Diethylenetriaminepentaacetic acid (DTPA) Formulation. Drug Dev Res 2012. [DOI: 10.1002/ddr.21018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Davidson JD, Wiacek RJ, Burton S, Li XS, Fryxell GE, Addleman RS, Yantasee W, Sangvanich T, Pattamakomsan K. Improved deposition and deprotection of silane tethered 3,4 hydroxypyridinone (HOPO) ligands on functionalized nanoporous silica. INORG CHEM COMMUN 2012; 18:92-96. [PMID: 22942668 PMCID: PMC3430465 DOI: 10.1016/j.inoche.2012.01.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
An improved synthesis of a 3,4 hydroxypyridinone (HOPO) functionalized mesoporous silica is described. Higher 3,4-HOPO monolayer ligand loadings have been achieved, resulting in better performance. Performance improvements were demonstrated with the capture of U(VI) from human blood, plasma and filtered river water.
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Affiliation(s)
- Joseph D. Davidson
- Applied Materials Science Group, Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA
| | - Robert J. Wiacek
- Applied Materials Science Group, Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA
| | - Sarah Burton
- Applied Materials Science Group, Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA
| | - Xiaohong S. Li
- Applied Materials Science Group, Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA
| | - Glen E. Fryxell
- Applied Materials Science Group, Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA
| | - R. Shane Addleman
- Applied Materials Science Group, Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA
| | - Wassana Yantasee
- Department of Biomedical Engineering, OHSU School of Medicine, Portland, Oregon 97239, USA
| | - Thanapon Sangvanich
- Department of Biomedical Engineering, OHSU School of Medicine, Portland, Oregon 97239, USA
| | - Kanda Pattamakomsan
- Department of Biomedical Engineering, OHSU School of Medicine, Portland, Oregon 97239, USA
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Abstract
All of the actinides are radioactive. Taken into the body, they damage and induce cancer in bone and liver, and in the lungs if inhaled, and U(VI) is a chemical kidney poison. Containment of radionuclides is fundamental to radiation protection, but if it is breached accidentally or deliberately, decontamination of exposed persons is needed to reduce the consequences of radionuclide intake. The only known way to reduce the health risks of internally deposited actinides is to accelerate their excretion with chelating agents. Ethylendiaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA) were introduced in the 1950's. DTPA is now clinically accepted, but its oral activity is low, it must be injected as a Ca(II) or Zn(II) chelate to avoid toxicity, and it is structurally unsuitable for chelating U(VI) or Np(V). Actinide penetration into the mammalian iron transport and storage systems suggested that actinide ions would form stable complexes with the Fe(III)-binding units found in potent selective natural iron chelators (siderophores). Testing of that biomimetic approach began in the late 1970's with the design, production, and assessment for in vivo Pu(IV) chelation of synthetic multidentate ligands based on the backbone structures and Fe(III)-binding groups of siderophores. New efficacious actinide chelators have emerged from that program, in particular, octadentate 3,4,3-LI(1,2-HOPO) and tetradentate 5-LIO(Me-3,2-HOPO) have potential for clinical acceptance. Both are much more effective than CaNa3-DTPA for decorporation of Pu(IV), Am(III), U(VI), and Np(IV,V), they are orally active, and toxicity is acceptably low at effective dosage.
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Affiliation(s)
- Patricia W Durbin
- Division of Chemical Sciences, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
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Chittamuru S, Lambert TN, Martinez G, Jacobs HK, Gopalan AS. New methodology for the preparation of 3-hydroxy-2-pyridinone (3,2-HOPO) chelators and extractants. Part 2. Reactions of alcohols, phenols, and thiols with an electrophilic 3,2-HOPO reagent(). Tetrahedron Lett 2007; 48:567-571. [PMID: 23162171 DOI: 10.1016/j.tetlet.2006.11.128] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The reactions of the electrophilic iminium ester mesylate salt 1 with alcohols, phenols and thiols has been investigated. In the presence of base, thiols, phenols and thiophenol react with 1 to give the corresponding ether linked HOPO derivatives in good yields. However, the ring opening of salt 1 with alcohols could only be accomplished efficiently using a large excess of the alcohol in the presence of methanesulfonic acid at 80°C. The synthetic utility of HOPO precursor, 1, has been demonstrated by the synthesis of two polyHOPO chelators 7 and 9.
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Affiliation(s)
- Sumathi Chittamuru
- Department of Chemistry and Biochemistry, MSC 3C, New Mexico State University, Las Cruces, NM 88003-8001
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Miller SC, Liu G, Bruenger FW, Lloyd RD. Efficacy of orally administered amphipathic polyaminocarboxylic acid chelators for the removal of plutonium and americium: comparison with injected Zn-DTPA in the rat. RADIATION PROTECTION DOSIMETRY 2006; 118:412-20. [PMID: 16332916 DOI: 10.1093/rpd/nci367] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Chelators are used to promote excretion of actinides and some other metals, but few are orally effective. The relative efficacies of orally administered triethylenetetraminepentaacetic acids (TT) with varying lipophilic properties on the removal of 241Am and 239Pu and comparison with parenteral Zn-DTPA was determined. The actinides were administered to adult rats 2 weeks prior to initiation of 30 d of chelation treatment. The TT compounds were given orally while Zn-DTPA was given twice weekly by injection. Total body content of 241Am was measured before and during the treatment period and organ contents of 241Am and 239Pu were measured at the end of the study. Significant reductions in 241Am occurred within the first week, with Zn-DTPA being the most effective. By 3 weeks, the most lipophilic chelator, C22TT was as effective as Zn-DTPA. After 30 d, reductions in organ content of 239Pu and 241Am directly correlated with increasing lipophilicity of the TT chelators. Oral C22TT was as effective as injected Zn-DTPA in liver and bone, the major organs of actinide deposition. The removal of 239Pu from the liver and reduction of redeposition of 239Pu in newly formed bone by C22TT was confirmed by neutron-induced autoradiographs. The amphipathic TT chelators may be useful as orally administered alternatives to current parenteral DTPA for the removal of actinide elements from the body, particularly for longer-term therapeutic applications.
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Affiliation(s)
- Scott C Miller
- Division of Radiobiology, Department of Radiology, University of Utah, 729 Arapeen Drive, Salt Lake City, Utah 84108, USA.
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Lin Y, Fiskum SK, Yantasee W, Wu H, Mattigod SV, Vorpagel E, Fryxell GE, Raymond KN, Xu J. Incorporation of hydroxypyridinone ligands into self-assembled monolayers on mesoporous supports for selective actinide sequestration. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2005; 39:1332-1337. [PMID: 15787374 DOI: 10.1021/es049169t] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In this study, three isomers of hydroxypyridinones (1,2-HOPO, 3,2-HOPO, and 3,4-HOPO) were attached to self-assembled monolayers on mesoporous silica (SAMMS). The HOPO-SAMMS materials have superior solid adsorbents properties: they do not suffer from solvent swelling; their rigid, open pore structure allows rapid sorption kinetics; their extremely high surface area enables the installation of high functional density; and being silica-based, they are compatible with vitrification into a final vitreous waste form. Kinetics, equilibrium, and selectivity of the adsorptions of actinide on the HOPO-SAMMS at various pH values and in the presence of other metal cations, anions, and competing ligands are reported. Rapid sequestration of U(VI), Np(V), and Pu(IV) was observed. Very little competition from transition metal cations and common species was observed.
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Affiliation(s)
- Yuehe Lin
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
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16
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Gorden AEV, Xu J, Raymond KN, Durbin P. Rational Design of Sequestering Agents for Plutonium and Other Actinides. Chem Rev 2003; 103:4207-82. [PMID: 14611263 DOI: 10.1021/cr990114x] [Citation(s) in RCA: 428] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anne E V Gorden
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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