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Marques IA, Abrantes AM, Pires AS, Neves AR, Caramelo FJ, Rodrigues T, Matafome P, Tavares-da-Silva E, Gonçalves AC, Pereira CC, Teixeira JP, Seiça R, Costa G, Figueiredo A, Botelho MF. Kinetics of radium-223 and its effects on survival, proliferation and DNA damage in lymph-node and bone metastatic prostate cancer cell lines. Int J Radiat Biol 2021; 97:714-726. [PMID: 33764249 DOI: 10.1080/09553002.2021.1906462] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Metastatic castration-resistant prostate cancer (mCRPC) is associated with a very unfavorable prognosis. At this advanced stage of the disease, there are several therapeutic strategies approved in recent times, being one of them Radium-223 dichloride (Radium-223). However, its mechanisms of action and the process that conducts to cell death are not fully understood. Given this, our main goal is to characterize the radiobiological effects induced by Radium-223 and to evaluate its kinetics on metastatic Prostate Cancer (mPCa) cells. MATERIALS AND METHODS In vitro studies were conducted using two mPCa cell lines, the LNCaP and PC3, the first being derived from lymph node metastasis and the second from bone metastasis. Kinetic studies were conducted to access the capacity of these cell lines to uptake, retain and internalize the Radium-223. For the assessment of radiobiological effects, cells were first exposed to different doses of Radium-223 and the clonogenic assay was done to evaluate cell survival and to determine lethal doses (LD50). Then, the effects were also evaluated in terms of proliferation, oxidative stress, morphological changes and cell damage. RESULTS Radium-223 is uptaken by mPCa cells and reaches the nucleus, where it is retained over time. Irradiation decreases cell survival and proliferation, with LNCaP cells (LD50 = 1.73mGy) being more radiosensitive than PC3 cells (LD50 = 4.20mGy). Irradiated cells showed morphological changes usually associated with apoptosis and a dose-dependent increase in DNA damage. Moreover, activation of cell cycle checkpoints occurs through ATM/CHK2 pathway, which is involved in cell cycle arrest and cell death. CONCLUSIONS The cytotoxic and anti-proliferative effects on both cell lines showed that Radium-223 can decrease the aggressiveness of tumor cells by decreasing the cell survival and proliferation and, also, by increasing the DNA damage. The similar results observed in both cell lines indicated that Radium-223 may have the potential to be used as a therapeutic option also for mCRPC patients with lymph node metastasis. The activation of DNA Damage Response pathways allows the possibility to understand the importance of these checkpoints as targets for new combined therapies.
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Affiliation(s)
- Inês A Marques
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.,University of Coimbra, Faculty of Pharmacy, Coimbra, Portugal
| | - Ana M Abrantes
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal
| | - Ana S Pires
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal
| | - Ana R Neves
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Coimbra, Portugal.,Project Development Office, Department of Mathematics and Computer Science, Eindhoven University of Technology (TU/e), Eindhoven, The Netherlands
| | - Francisco J Caramelo
- Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.,University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Laboratory of Biostatistics and Medical Informatics of Faculty of Medicine, Coimbra, Portugal
| | - Tiago Rodrigues
- Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.,University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Laboratory of Physiology of Faculty of Medicine, Coimbra, Portugal
| | - Paulo Matafome
- Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.,University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Laboratory of Physiology of Faculty of Medicine, Coimbra, Portugal
| | - Edgar Tavares-da-Silva
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.,Centro Hospitalar e Universitário de Coimbra (CHUC), Department of Urology and Renal Transplantation, Coimbra, Portugal
| | - Ana C Gonçalves
- Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.,University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Laboratory of Oncobiology and Hematology and University Clinic of Hematology of Faculty of Medicine, Coimbra, Portugal
| | - Cristiana C Pereira
- National Institute of Health, Environmental Health Department, Porto, Portugal.,EPIUnit - Instituto de Saúde Pública, Universidade do Porto, Porto, Portugal
| | - João P Teixeira
- National Institute of Health, Environmental Health Department, Porto, Portugal.,EPIUnit - Instituto de Saúde Pública, Universidade do Porto, Porto, Portugal
| | - Raquel Seiça
- Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.,University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Laboratory of Physiology of Faculty of Medicine, Coimbra, Portugal
| | - Grancinda Costa
- Centro Hospitalar e Universitário de Coimbra (CHUC), Department of Nuclear Medicine, Coimbra, Portugal
| | - Arnaldo Figueiredo
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.,Centro Hospitalar e Universitário de Coimbra (CHUC), Department of Urology and Renal Transplantation, Coimbra, Portugal
| | - Maria F Botelho
- University of Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Biophysics Institute of Faculty of Medicine, Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.,Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal
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Tranel J, Feng FY, James SS, Hope TA. Effect of microdistribution of alpha and beta-emitters in targeted radionuclide therapies on delivered absorbed dose in a GATE model of bone marrow. Phys Med Biol 2021; 66:035016. [PMID: 33321484 PMCID: PMC7880907 DOI: 10.1088/1361-6560/abd3ef] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Acute hematologic toxicity is a frequent adverse effect of beta-emitter targeted radionuclide therapies (TRTs). Alpha emitters have the potential of delivering high linear energy transfer (LET) radiation to the tumor attributed to its shorter range. Antibody-based TRTs have increased blood-pool half-lives, and therefore increased marrow toxicity, which is a particular concern with alpha emitters. Accurate 3D absorbed dose calculations focusing on the interface region of blood vessels and bone can elucidate energy deposition patterns. Firstly, a cylindrical geometry model with a central blood vessel embedded in the trabecular tissue was modeled. Monte Carlo simulations in GATE were performed considering beta (177Lu, 90Y) and alpha emitters (211At, 225Ac) as sources restricted to the blood pool. Subsequently, the radioactive sources were added in the trabecular bone compartment in order to model bone marrow metastases infiltration (BMMI). Radial profiles, dose-volume histograms and voxel relative differences were used to evaluate the absorbed dose results. We demonstrated that alpha emitters have a higher localized energy deposition compared to beta emitters. In the cylindrical geometry model, when the sources are confined to the blood pool, the dose to the trabecular bone is greater for beta emitting radionuclides, as alpha emitters deposit the majority of their energy within 70 μm of the vessel wall. In the BMMI model, alpha emitters have a lower dose to untargeted trabecular bone. Our results suggest that when alpha emitters are restricted to the blood pool, as when labeled to antibodies, hematologic toxicities may be lower than expected due to differences in the microdistribution of delivered absorbed dose.
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Affiliation(s)
- Jonathan Tranel
- Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco CA, United States of America
| | - Felix Y Feng
- Department of Radiation Oncology, University of California San Francisco, San Francisco CA, United States of America
- UCSF Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, United States of America
| | - Sara St James
- Department of Radiation Oncology, University of California San Francisco, San Francisco CA, United States of America
| | - Thomas A Hope
- Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco CA, United States of America
- UCSF Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, United States of America
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Salvanou EA, Stellas D, Tsoukalas C, Mavroidi B, Paravatou-Petsotas M, Kalogeropoulos N, Xanthopoulos S, Denat F, Laurent G, Bazzi R, Roux S, Bouziotis P. A Proof-of-Concept Study on the Therapeutic Potential of Au Nanoparticles Radiolabeled with the Alpha-Emitter Actinium-225. Pharmaceutics 2020; 12:pharmaceutics12020188. [PMID: 32098286 PMCID: PMC7076693 DOI: 10.3390/pharmaceutics12020188] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 01/20/2020] [Accepted: 02/19/2020] [Indexed: 01/01/2023] Open
Abstract
Actinium-225 (225Ac) is receiving increased attention for its application in targeted radionuclide therapy, due to the short range of its emitted alpha particles in conjunction with their high linear energy transfer, which lead to the eradication of tumor cells while sparing neighboring healthy tissue. The objective of our study was the evaluation of a gold nanoparticle radiolabeled with 225Ac as an injectable radiopharmaceutical form of brachytherapy for local radiation treatment of cancer. Au@TADOTAGA was radiolabeled with 225Ac at pH 5.6 (30 min at 70 °C), and in vitro stability was evaluated. In vitro cytotoxicity was assessed in U-87 MG cancer cells, and in vivo biodistribution was performed by intravenous and intratumoral administration of [225Ac]225Ac-Au@TADOTAGA in U-87 MG tumor-bearing mice. A preliminary study to assess therapeutic efficacy of the intratumorally-injected radio-nanomedicine was performed over a period of 22 days, while the necrotic effect on tumors was evaluated by a histopathology study. We have shown that [225Ac]225Ac-Au@TADOTAGA resulted in the retardation of tumor growth after its intratumoral injection in U87MG tumor-bearing mice, even though very low activities were injected per mouse. This gold nanoparticle radiopharmaceutical could be applied as an unconventional brachytherapy in injectable form for local radiation treatment of cancer.
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Affiliation(s)
- Evangelia-Alexandra Salvanou
- Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, National Center for Scientific Research “Demokritos”, 15341 Athens, Greece; (E.-A.S.); (C.T.); (M.P.-P.); (S.X.)
| | - Dimitris Stellas
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635 Athens, Greece
| | - Charalampos Tsoukalas
- Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, National Center for Scientific Research “Demokritos”, 15341 Athens, Greece; (E.-A.S.); (C.T.); (M.P.-P.); (S.X.)
| | - Barbara Mavroidi
- Institute of Biosciences and Applications, National Center for Scientific Research “Demokritos”, 15341 Athens, Greece;
| | - Maria Paravatou-Petsotas
- Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, National Center for Scientific Research “Demokritos”, 15341 Athens, Greece; (E.-A.S.); (C.T.); (M.P.-P.); (S.X.)
| | | | - Stavros Xanthopoulos
- Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, National Center for Scientific Research “Demokritos”, 15341 Athens, Greece; (E.-A.S.); (C.T.); (M.P.-P.); (S.X.)
| | - Franck Denat
- ICMUB, UMR 6302 CNRS-UB, Université Bourgogne Franche-Comté, 21000 Dijon, France;
| | - Gautier Laurent
- Institut UTINAM, UMR 6213 CNRS-UBFC, Université Bourgogne Franche-Comté, 25030 Besançon, France; (G.L.); (R.B.); (S.R.)
| | - Rana Bazzi
- Institut UTINAM, UMR 6213 CNRS-UBFC, Université Bourgogne Franche-Comté, 25030 Besançon, France; (G.L.); (R.B.); (S.R.)
| | - Stephane Roux
- Institut UTINAM, UMR 6213 CNRS-UBFC, Université Bourgogne Franche-Comté, 25030 Besançon, France; (G.L.); (R.B.); (S.R.)
| | - Penelope Bouziotis
- Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, National Center for Scientific Research “Demokritos”, 15341 Athens, Greece; (E.-A.S.); (C.T.); (M.P.-P.); (S.X.)
- Correspondence: ; Tel.: +30-21-0650-3687
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Mikolajczak R, van der Meulen NP, Lapi SE. Radiometals for imaging and theranostics, current production, and future perspectives. J Labelled Comp Radiopharm 2019; 62:615-634. [PMID: 31137083 DOI: 10.1002/jlcr.3770] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 04/10/2019] [Accepted: 05/15/2019] [Indexed: 02/06/2023]
Abstract
The aim of this review is to make the reader familiar with currently available radiometals, their production modes, capacities, and quality concerns related to their medical use, as well as new emerging radiometals and irradiation technologies from the perspective of their diagnostic and theranostic applications. Production methods of 177 Lu serve as an example of various issues related to the production yield, specific activity, radionuclidic and chemical purity, and production economy. Other radiometals that are currently used or explored for potential medical applications, with particular focus on their theranostic value, are discussed. Using radiometals for diagnostic imaging and therapy is on the rise. The high demand for radiometals for medical use prompts investigations towards using alternative irradiation reactions, while using existing nuclear reactors and accelerator facilities. This review discusses these production capacities and what is necessary to cover the growing demand for theranostic nuclides.
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Affiliation(s)
- Renata Mikolajczak
- Radioisotope Centre POLATOM, National Centre for Nuclear Research, Otwock, Poland
| | | | - Suzanne E Lapi
- Department of Radiology, University of Alabama at Birmingham, Birmingham, Alabama
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Huckle JE, Sadgrove MP, Pacyniak E, Leed MGD, Weber WM, Doyle-Eisele M, Guilmette RA, Agha BJ, Susick RL, Mumper RJ, Jay M. Orally administered DTPA di-ethyl ester for decorporation of (241)Am in dogs: Assessment of safety and efficacy in an inhalation-contamination model. Int J Radiat Biol 2015; 91:568-75. [PMID: 25912343 DOI: 10.3109/09553002.2015.1043753] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
PURPOSE Currently two injectable products of diethylenetriaminepentaacetic acid (DTPA) are U.S. Food and Drug Administration (FDA)-approved for decorporation of (241)Am; however, an oral product is considered more amenable in a mass casualty situation. The di-ethyl ester of DTPA, named C2E2, is being developed as an oral drug for treatment of internal radionuclide contamination. MATERIALS AND METHODS Single-dose decorporation efficacy of C2E2 administered 24-h post contamination was determined in beagle dogs using a (241)Am nitrate inhalation contamination model. Single and multiple dose toxicity studies in beagle dogs were performed as part of an initial safety assessment program. In addition, the genotoxic potential of C2E2 was evaluated by the in vitro bacterial reverse mutation Ames test, mammalian cell chromosome aberration cytogenetic assay and an in vivo micronucleus test. RESULTS Oral administration of C2E2 significantly increased (241)Am elimination over untreated controls and significantly reduced the retention of (241)Am in tissues, especially liver, kidney, lung and bone. Daily dosing of 200 mg/kg/day for 10 days was well tolerated in dogs. C2E2 was found to be neither mutagenic or clastogenic. CONCLUSIONS The di-ethyl ester of DTPA (C2E2) was shown to effectively enhance the elimination of (241)Am after oral administration in a dog inhalation-contamination model and was well tolerated in toxicity studies.
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Affiliation(s)
- James E Huckle
- University of North Carolina at Chapel Hill, Eshelman School of Pharmacy, Division of Molecular Pharmaceutics , Chapel Hill , NC
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Elgqvist J, Frost S, Pouget JP, Albertsson P. The potential and hurdles of targeted alpha therapy - clinical trials and beyond. Front Oncol 2014; 3:324. [PMID: 24459634 PMCID: PMC3890691 DOI: 10.3389/fonc.2013.00324] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Accepted: 12/19/2013] [Indexed: 01/23/2023] Open
Abstract
This article presents a general discussion on what has been achieved so far and on the possible future developments of targeted alpha (α)-particle therapy (TAT). Clinical applications and potential benefits of TAT are addressed as well as the drawbacks, such as the limited availability of relevant radionuclides. Alpha-particles have a particular advantage in targeted therapy because of their high potency and specificity. These features are due to their densely ionizing track structure and short path length. The most important consequence, and the major difference compared with the more widely used β−-particle emitters, is that single targeted cancer cells can be killed by self-irradiation with α-particles. Several clinical trials on TAT have been reported, completed, or are on-going: four using 213Bi, two with 211At, two with 225Ac, and one with 212Pb/212Bi. Important and conceptual proof-of-principle of the therapeutic advantages of α-particle therapy has come from clinical studies with 223Ra-dichloride therapy, showing clear benefits in castration-resistant prostate cancer.
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Affiliation(s)
- Jörgen Elgqvist
- IRCM, Institut de Recherche en Cancérologie de Montpellier , Montpellier , France ; INSERM, U896 , Montpellier , France ; Université Montpellier 1 , Montpellier , France ; Institut Régional de Cancérologie de Montpellier , Montpellier , France
| | - Sofia Frost
- Fred Hutchinson Cancer Research Center , Seattle, WA , USA
| | - Jean-Pierre Pouget
- IRCM, Institut de Recherche en Cancérologie de Montpellier , Montpellier , France ; INSERM, U896 , Montpellier , France ; Université Montpellier 1 , Montpellier , France ; Institut Régional de Cancérologie de Montpellier , Montpellier , France
| | - Per Albertsson
- Department of Oncology, University of Gothenburg , Gothenburg , Sweden
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