1
|
Van der Meeren A, Devilliers K, Griffiths N, Chaplault AS, Defrance M, Ducouret G, Pasteur M, Laroche P, Caire-Maurisier F. Decontamination of Actinide-contaminated Injured Skin with Ca-DTPA Products Using an Ex Vivo Rat Skin Model. HEALTH PHYSICS 2024:00004032-990000000-00149. [PMID: 38768323 DOI: 10.1097/hp.0000000000001827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
ABSTRACT Skin contamination by α-emitting actinides such as plutonium and americium is a risk for workers during nuclear fuel production and reactor decommissioning. Decontamination of skin is an important medical countermeasure to limit potential internal contamination, particularly in the case of injured skin. Current recommendations include undressing of the victim followed by skin washing using soap or chelating agents, such as diethylene triamine pentaacetic acid (DTPA). The goal of the present work is to assess the efficacy of a novel Ca-DTPA loaded gel to decontaminate injured skin exposed to plutonium or americium as compared to recommended treatments. For decontaminant testing on injured skin, whole body skin was obtained from euthanized rats and lesions created using a metallic brush. Delimited test areas were contaminated with plutonium or americium solutions of known properties. Various protocols were tested including time before contamination, duration of gel application, washing steps, as well as the concomitant addition or not of dressings. Activity was measured in each decontamination product and in skin. Data indicate that healthy skin was easier to decontaminate than damaged skin. On injured skin, we demonstrated an increased decontamination efficacy of the Ca-DTPA gel formulation as compared to the solution. Importantly, gel application alone was effective, and further gel applications could be used for residual activity.
Collapse
Affiliation(s)
- Anne Van der Meeren
- Laboratory of Radio Toxicology, CEA, Paris-Saclay University, 91297 Arpajon, France
| | - Karine Devilliers
- Laboratory of Radio Toxicology, CEA, Paris-Saclay University, 91297 Arpajon, France
| | - Nina Griffiths
- Laboratory of Radio Toxicology, CEA, Paris-Saclay University, 91297 Arpajon, France
| | | | - Martine Defrance
- Laboratory of Radio Toxicology, CEA, Paris-Saclay University, 91297 Arpajon, France
| | | | | | - Pierre Laroche
- Direction of Health, Security, Environment & Radioprotection, Orano, Châtillon, France
| | | |
Collapse
|
2
|
Lazar AN, Perret F, Perez-Lloret M, Michaud M, Coleman AW. Promises of anionic calix[n]arenes in life science: State of the art in 2023. Eur J Med Chem 2024; 264:115994. [PMID: 38070431 DOI: 10.1016/j.ejmech.2023.115994] [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: 10/17/2023] [Revised: 11/22/2023] [Accepted: 11/22/2023] [Indexed: 12/30/2023]
Abstract
Because they hold together molecules by means of non-covalent interactions - relatively weak and thus, potentially reversible - the anionic calixarenes have become an interesting tool for efficiently binding a large range of ligands - from gases to large organic molecules. Being highly water soluble and conveniently biocompatible, they showed growing interest for many interdisciplinary fields, particularly in biology and medicine. Thanks to their intrinsic conical shape, they provide suitable platforms, from vesicles to bilayers. This is a valuable characteristic, as so they mimic the biologically functional architectures. The anionic calixarenes propose efficient alternatives for overcoming the limitations linked to drug delivery and bioavailability, as well as drug resistance along with limiting the undesirable side effects. Moreover, the dynamic non-covalent binding with the drugs enables predictable and on demand drug release, controlled by the stimuli present in the targeted environment. This particular feature instigated the use of these versatile, stimuli-responsive compounds for sensing biomarkers of diverse pathologies. The present review describes the recent achievements of the anionic calixarenes in the field of life science, from drug carriers to biomedical engineering, with a particular outlook on their applications for the diagnosis and treatment of different pathologies.
Collapse
Affiliation(s)
- Adina-N Lazar
- Univ Lyon, INSA-Lyon, CNRS UMR5259, LaMCoS, F-69621, France.
| | - Florent Perret
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, UMR 5246, Univ. Lyon - CNRS - Univ. Claude Bernard Lyon 1 - CPE Lyon, 43 Boulevard du 11 Novembre 1918, Villeurbanne, 69622, Cedex, France.
| | - Marta Perez-Lloret
- School of Biological and Chemical Sciences, University of Galway, Ireland Galway, Ireland
| | - Mickael Michaud
- CIRI, Univ. Lyon1, Inserm, U1111, CNRS, UMR5308, ENS, Lyon, France
| | | |
Collapse
|
3
|
Arrambide C, Ferrie L, Prelot B, Geneste A, Monge S, Darcos V. α-Aminobisphosphonate Copolymers Based on Poly(ε-caprolactone)s and Poly(ethylene glycol): A New Opportunity for Actinide Complexation. Biomacromolecules 2023; 24:5058-5070. [PMID: 37676932 DOI: 10.1021/acs.biomac.3c00673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
Original α-aminobisphosphonate-based copolymers were synthesized and successfully used for actinide complexation. For this purpose, poly(α-chloro-ε-caprolactone-co-ε-caprolactone)-b-poly(ethylene glycol)-b-poly(α-chloro-ε-caprolactone-co-ε-caprolactone) copolymers were first prepared by ring-opening copolymerization of ε-caprolactone (εCL) and α-chloro-ε-caprolactone using poly(ethylene glycol) (PEG) as a macro-initiator and tin(II) octanoate as a catalyst. The chloride functions were then converted to azide moieties by chemical modification, and finally α-aminobisphosphonate alkyne ligand (TzBP) was grafted using click chemistry, to afford well-defined poly(αTzBPεCL-co-εCL)-b-PEG-b-poly(αTzBPεCL-co-εCL) copolymers. Three copolymers, showing different α-aminobisphosphonate group ratios, were prepared (7, 18, and 38%), namely, CP8, CP9, and CP10, respectively. They were characterized by 1H and 31P NMR and size exclusion chromatography. Sorption properties of these copolymers were evaluated by isothermal titration calorimetry (ITC) with neodymium [Nd(III)] and cerium [Ce(III)] cations, used as surrogates of actinides, especially uranium and plutonium, respectively. ITC enabled the determination of the full thermodynamic profile and the calculation of the complete set of thermodynamic parameter (ΔH, TΔS, and ΔG), with the Ka constant and the n stoichiometry. The results showed that the number of cations sorbed by the functional copolymers logically increased with the number of bisphosphonate functions borne by the macromolecular chain, independently of the complexed cation. Additionally, CP9 and CP10 copolymers showed higher sorption capacities [21.4 and 34.0 mg·g-1 for Nd(III) and 9.6 and 14.3 mg·g-1 for Ce(III), respectively] than most of the systems previously described in the literature. CP9 also showed a highest binding constant (7000 M-1). These copolymers, based on non-toxic and biocompatible poly(ε-caprolactone) and PEG, are of great interest for external body decontamination of actinides as they combine high number of complexing groups, thus leading to great decontamination efficiency, and limited diffusion through the skin due to their high-molecular weight, thus avoiding additional possible internal contamination.
Collapse
Affiliation(s)
| | - Loona Ferrie
- ICGM, Univ Montpellier, CNRS, ENSCM, 34293 Montpellier, France
| | | | - Amine Geneste
- ICGM, Univ Montpellier, CNRS, ENSCM, 34293 Montpellier, France
| | - Sophie Monge
- ICGM, Univ Montpellier, CNRS, ENSCM, 34293 Montpellier, France
| | - Vincent Darcos
- IBMM, Univ Montpellier, CNRS, ENSCM, 34293 Montpellier, France
| |
Collapse
|
4
|
Bouvier-Capely C, Phan G. Comments on "A Simple, Rapid, Comparative Evaluation of Multiple Products for Decontamination of Actinide-contaminated Rat Skin Ex Vivo". HEALTH PHYSICS 2022; 123:154-155. [PMID: 35749616 DOI: 10.1097/hp.0000000000001575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- Céline Bouvier-Capely
- Institut de Radioprotection et Sûreté Nucléaire PSE-SANTE/SESANE/LRSI 31 Avenue de la Division Leclerc 92260, Fontenay-aux-Roses, France. ;
| | | |
Collapse
|
5
|
Griffiths NM, Devilliers K, Laroche P, Van der Meeren A. A Simple, Rapid, Comparative Evaluation of Multiple Products for Decontamination of Actinide-contaminated Rat Skin Ex Vivo. HEALTH PHYSICS 2022; 122:371-382. [PMID: 34966085 DOI: 10.1097/hp.0000000000001506] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
ABSTRACT Decontamination of skin is an important medical countermeasure in order to limit potential internal contamination by radionuclides such as actinides. Minimizing skin surface contamination will ultimately prevent internal contamination and subsequent committed effective dose as well as contamination spreading. The decontamination agents tested on a rat skin ex vivo model ranged from water to hydrogel wound dressings. A surfactant-containing cleansing gel and calixarene nanoemulsion with chelation properties demonstrated marked decontamination efficacies as compared with water or the chelator DTPA. Based on efficacy to remove different actinide physicochemical forms from skin, the results demonstrate that all products can remove the more soluble forms, but a further component of emulsifying or tensioactive action is required for less soluble forms. This indicates that for practical purposes, successful decontamination will depend on identification of the actinide element, the physicochemical form, and possibly the solvent. This study offers a simple, quick, cheap, reproducible screening method for efficacy evaluation of multiple products for removal of a variety of contaminants.
Collapse
Affiliation(s)
- Nina M Griffiths
- Laboratory of RadioToxicology, CEA, Paris-Saclay University, Bruyères le Châtel, France
| | - Karine Devilliers
- Laboratory of RadioToxicology, CEA, Paris-Saclay University, Bruyères le Châtel, France
| | - Pierre Laroche
- Direction of Health, Security, Environment & Radioprotection, ORANO, Paris, France
| | - Anne Van der Meeren
- Laboratory of RadioToxicology, CEA, Paris-Saclay University, Bruyères le Châtel, France
| |
Collapse
|