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Roncali L, Marionneau-Lambot S, Roy C, Eychenne R, Gouard S, Avril S, Chouin N, Riou J, Allard M, Rousseau A, Guérard F, Hindré F, Chérel M, Garcion E. Brain intratumoural astatine-211 radiotherapy targeting syndecan-1 leads to durable glioblastoma remission and immune memory in female mice. EBioMedicine 2024; 105:105202. [PMID: 38905749 PMCID: PMC11246004 DOI: 10.1016/j.ebiom.2024.105202] [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: 02/14/2024] [Revised: 05/31/2024] [Accepted: 05/31/2024] [Indexed: 06/23/2024] Open
Abstract
BACKGROUND Glioblastoma (GB), the most aggressive brain cancer, remains a critical clinical challenge due to its resistance to conventional treatments. Here, we introduce a locoregional targeted-α-therapy (TAT) with the rat monoclonal antibody 9E7.4 targeting murine syndecan-1 (SDC1) coupled to the α-emitter radionuclide astatine-211 (211At-9E7.4). METHODS We orthotopically transplanted 50,000 GL261 cells of murine GB into the right striatum of syngeneic female C57BL/6JRj mice using stereotaxis. After MRI validation of tumour presence at day 11, TAT was injected at the same coordinates. Biodistribution, efficacy, toxicity, local and systemic responses were assessed following application of this protocol. The 9E7.4 monoclonal antibody was labelled with iodine-125 (125I) for biodistribution and with astatine-211 (211At) for the other experiments. FINDINGS The 211At-9E7.4 TAT demonstrated robust efficacy in reducing orthotopic tumours and achieved improved survival rates in the C57BL/6JRj model, reaching up to 70% with a minimal activity of 100 kBq. Targeting SDC1 ensured the cerebral retention of 211At over an optimal time window, enabling low-activity administration with a minimal toxicity profile. Moreover, TAT substantially reduced the occurrence of secondary tumours and provided resistance to new tumour development after contralateral rechallenge, mediated through the activation of central and effector memory T cells. INTERPRETATION The locoregional 211At-9E7.4 TAT stands as one of the most efficient TAT across all preclinical GB models. This study validates SDC1 as a pertinent therapeutic target for GB and underscores 211At-9E7.4 TAT as a promising advancement to improve the treatment and quality of life for patients with GB. FUNDING This work was funded by the French National Agency for Research (ANR) "France 2030 Investment Plan" Labex Iron [ANR-11-LABX-18-01], The SIRIC ILIAD [INCa-DGOS-INSERM-18011], the French program "Infrastructure d'Avenir en Biologie-Santé" (France Life Imaging) [ANR-11-INBS-0006], the PIA3 of the ANR, integrated to the "France 2030 Investment Plan" [ANR-21-RHUS-0012], and support from Inviscan SAS (Strasbourg, France). It was also related to: the ANR under the frame of EuroNanoMed III (project GLIOSILK) [ANR-19-ENM3-0003-01]; the "Région Pays-de-la-Loire" under the frame of the Target'In project; the "Ligue Nationale contre le Cancer" and the "Comité Départemental de Maine-et-Loire de la Ligue contre le Cancer" (CD49) under the frame of the FusTarG project and the "Tumour targeting, imaging and radio-therapies network" of the "Cancéropôle Grand-Ouest" (France). This work was also funded by the Institut National de la Santé et de la Recherche Médicale (INSERM), the University of Nantes, and the University of Angers.
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Affiliation(s)
- Loris Roncali
- Université d'Angers, INSERM, CNRS, CRCI(2)NA, F-49000, Angers, France; Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France
| | - Séverine Marionneau-Lambot
- Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France; CHU Nantes, Nantes Université, Service de médecine nucléaire, F-44000, Nantes, France; CIMA (Centre d'Imagerie Multimodale Appliquée), Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France
| | - Charlotte Roy
- Université d'Angers, INSERM, CNRS, CRCI(2)NA, F-49000, Angers, France; PRIMEX (Plateforme de Radiobiologie et d'Imageries Expérimentales), Université d'Angers, SFR 4208, F-49000, Angers, France
| | - Romain Eychenne
- Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France; GIP ARRONAX, F-44160, Saint-Herblain, France
| | - Sébastien Gouard
- Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France; CIMA (Centre d'Imagerie Multimodale Appliquée), Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France
| | - Sylvie Avril
- Université d'Angers, INSERM, CNRS, CRCI(2)NA, F-49000, Angers, France
| | - Nicolas Chouin
- Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France; ONIRIS, F-44000, Nantes, France
| | - Jérémie Riou
- CHU Angers, Université d'Angers, F-49000, Angers, France
| | - Mathilde Allard
- Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France
| | - Audrey Rousseau
- Université d'Angers, INSERM, CNRS, CRCI(2)NA, F-49000, Angers, France; CHU Angers, Université d'Angers, F-49000, Angers, France
| | - François Guérard
- Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France
| | - François Hindré
- Université d'Angers, INSERM, CNRS, CRCI(2)NA, F-49000, Angers, France; PRIMEX (Plateforme de Radiobiologie et d'Imageries Expérimentales), Université d'Angers, SFR 4208, F-49000, Angers, France
| | - Michel Chérel
- Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France; CIMA (Centre d'Imagerie Multimodale Appliquée), Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France; Institut de Cancérologie de l'Ouest, Service de médecine nucléaire, F-44160, Saint-Herblain, France.
| | - Emmanuel Garcion
- Université d'Angers, INSERM, CNRS, CRCI(2)NA, F-49000, Angers, France; PRIMEX (Plateforme de Radiobiologie et d'Imageries Expérimentales), Université d'Angers, SFR 4208, F-49000, Angers, France; PACEM (Plateforme d'Analyse Cellulaire et Moléculaire), Université d'Angers, SFR 4208, F-49000, Angers, France.
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Rabiei M, Asadi M, Yousefnia H. Astatine-211 Radiopharmaceuticals; Status, Trends, and the Future. Curr Radiopharm 2024; 17:7-13. [PMID: 37937552 DOI: 10.2174/0118744710262325231025075638] [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: 03/15/2023] [Revised: 08/12/2023] [Accepted: 09/15/2023] [Indexed: 11/09/2023]
Abstract
The low range of alpha particles provides an opportunity to better target cancer cells theoretically leading to the introduction of interesting alpha emitter radiopharmaceuticals including 225Ac, 212Pb, etc. The combination of high energy and short range of alpha emitters differentiates targeted radiotherapy from other methods and reduces unwanted cytotoxicity of the cells around the tumoral tissue. Among interesting alpha emitters candidates for targeted therapy, 211At, one of the radioisotopes with the best optimal decay properties, shows great promise for targeted radiotherapy in some animal prostate cancer xenograft studies and bone micro tumors with significant effects compared to other beta and alpha emitters and also demonstrates interesting properties for clinical applications. However, production and application of this alpha emitter in the development of actinium-based radiopharmaceuticals is hampered by many obstacles. This mini-review demonstrates 211At production methods, chemical separation, radiolabeling procedures, 211At-radiopharmaceuticals and their clinical trials, transport, logistics, and costs and future trends in the field for ultimate clinical applications. This review showed that there are limited clinical trials on 211Ac-based radiopharmaceuticals, which is due to the low accessibility of this radioisotope and other limitations. However, the development programs of major industries indicate the development of 211Ac-based radiopharmaceuticals in the future.
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Affiliation(s)
- Mobina Rabiei
- Nuclear Engineering School, Islamic Azad University Shahrood Branch, Shahrud, Iran
| | - Mahboobeh Asadi
- Research Center for Nuclear Medicine, Shariati Hospital, Tehran University of Medical Science, Tehran, Iran
| | - Hassan Yousefnia
- Radiation Application Research School, Nuclear Science and Technology Research Institute (NSTRI), Tehran, Iran
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Herrero Alvarez N, Michel AL, Viray TD, Mayerhoefer ME, Lewis JS. 89Zr-DFO-Isatuximab for CD38-Targeted ImmunoPET Imaging of Multiple Myeloma and Lymphomas. ACS OMEGA 2023; 8:22486-22495. [PMID: 37396228 PMCID: PMC10308590 DOI: 10.1021/acsomega.3c00624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 03/30/2023] [Indexed: 07/04/2023]
Abstract
Multiple myeloma (MM) is the second most prevalent hematological malignancy. It remains incurable despite the availability of novel therapeutic approaches, marking an urgent need for new agents for noninvasive targeted imaging of MM lesions. CD38 has proven to be an excellent biomarker due to its high expression in aberrant lymphoid and myeloid cells relative to normal cell populations. Using isatuximab (Sanofi), the latest FDA-approved CD38-targeting antibody, we have developed Zirconium-89(89Zr)-labeled isatuximab as a novel immunoPET tracer for the in vivo delineation of MM and evaluated the extension of its applicability to lymphomas. In vitro studies validated the high binding affinity and specificity of 89Zr-DFO-isatuximab for CD38. PET imaging demonstrated the high performance of 89Zr-DFO-isatuximab as a targeted imaging agent to delineate tumor burden in disseminated models of MM and Burkitt's lymphoma. Ex vivo biodistribution studies confirmed that high accumulations of the tracer in bone marrow and bone skeleton correspond to specific disease lesions as they are reduced to background in blocking and healthy controls. This work demonstrates the promise of 89Zr-DFO-isatuximab as an immunoPET tracer for CD38-targeted imaging of MM and certain lymphomas. More importantly, its potential as an alternative to 89Zr-DFO-daratumumab holds great clinical relevance.
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Affiliation(s)
- Natalia Herrero Alvarez
- Department
of Radiology and Program in Pharmacology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Alexa L. Michel
- Department
of Radiology and Program in Pharmacology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Tara D. Viray
- Department
of Radiology and Program in Pharmacology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Marius E. Mayerhoefer
- Department
of Radiology and Program in Pharmacology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Jason S. Lewis
- Department
of Radiology and Program in Pharmacology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
- Departments
of Pharmacology and Radiology, Weill Cornell
Medicine, New York, New York 10065, United
States
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Métivier C, Le Saëc P, Gaschet J, Chauvet C, Marionneau-Lambot S, Hofgaard PO, Bogen B, Pineau J, Le Bris N, Tripier R, Alliot C, Haddad F, Chérel M, Chouin N, Faivre-Chauvet A, Rbah-Vidal L. Preclinical Evaluation of a 64Cu-Based Theranostic Approach in a Murine Model of Multiple Myeloma. Pharmaceutics 2023; 15:1817. [PMID: 37514004 PMCID: PMC10385603 DOI: 10.3390/pharmaceutics15071817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 06/16/2023] [Accepted: 06/16/2023] [Indexed: 07/30/2023] Open
Abstract
Although the concept of theranostics is neither new nor exclusive to nuclear medicine, it is a particularly promising approach for the future of nuclear oncology. This approach is based on the use of molecules targeting specific biomarkers in the tumour or its microenvironment, associated with optimal radionuclides which, depending on their emission properties, allow the combination of diagnosis by molecular imaging and targeted radionuclide therapy (TRT). Copper-64 has suitable decay properties (both β+ and β- decays) for PET imaging and potentially for TRT, making it both an imaging and therapy agent. We developed and evaluated a theranostic approach using a copper-64 radiolabelled anti-CD138 antibody, [64Cu]Cu-TE1PA-9E7.4 in a MOPC315.BM mouse model of multiple myeloma. PET imaging using [64Cu]Cu-TE1PA-9E7.4 allows for high-resolution PET images. Dosimetric estimation from ex vivo biodistribution data revealed acceptable delivered doses to healthy organs and tissues, and a very encouraging tumour absorbed dose for TRT applications. Therapeutic efficacy resulting in delayed tumour growth and increased survival without inducing major or irreversible toxicity has been observed with 2 doses of 35 MBq administered at a 2-week interval. Repeated injections of [64Cu]Cu-TE1PA-9E7.4 are safe and can be effective for TRT application in this syngeneic preclinical model of MM.
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Affiliation(s)
- Cassandra Métivier
- Nantes Université, Inserm, CNRS, Université d'Angers, CRCI2NA, 44007 Nantes, France
| | - Patricia Le Saëc
- Nantes Université, Inserm, CNRS, Université d'Angers, CRCI2NA, 44007 Nantes, France
| | - Joëlle Gaschet
- Nantes Université, Inserm, CNRS, Université d'Angers, CRCI2NA, 44007 Nantes, France
| | - Catherine Chauvet
- Nantes Université, Inserm, CNRS, Université d'Angers, CRCI2NA, 44007 Nantes, France
| | | | - Peter O Hofgaard
- Department of Immunology, Oslo University Hospital, 04024 Oslo, Norway
| | - Bjarne Bogen
- Department of Immunology, Oslo University Hospital, 04024 Oslo, Norway
| | - Julie Pineau
- Univ. Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor le Gorgeu, 29200 Brest, France
| | - Nathalie Le Bris
- Univ. Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor le Gorgeu, 29200 Brest, France
| | - Raphaël Tripier
- Univ. Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor le Gorgeu, 29200 Brest, France
| | - Cyrille Alliot
- Nantes Université, Inserm, CNRS, Université d'Angers, CRCI2NA, 44007 Nantes, France
- GIP ARRONAX, 44800 Saint-Herblain, France
| | - Férid Haddad
- IMT Atlantique, Nantes Université, Subatech, 44307 Nantes, France
- GIP ARRONAX, 44800 Saint-Herblain, France
| | - Michel Chérel
- Nantes Université, Inserm, CNRS, Université d'Angers, CRCI2NA, 44007 Nantes, France
- Nuclear Medicine Department, ICO-René Gauducheau Cancer Center, 44800 Saint-Herblain, France
| | - Nicolas Chouin
- Nantes Université, Inserm, CNRS, Université d'Angers, Oniris, CRCI2NA, 44007 Nantes, France
| | - Alain Faivre-Chauvet
- Nantes Université, Inserm, CNRS, Université d'Angers, CRCI2NA, CHU Nantes, 44007 Nantes, France
| | - Latifa Rbah-Vidal
- Nantes Université, Inserm, CNRS, Université d'Angers, CRCI2NA, 44007 Nantes, France
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Albertsson P, Bäck T, Bergmark K, Hallqvist A, Johansson M, Aneheim E, Lindegren S, Timperanza C, Smerud K, Palm S. Astatine-211 based radionuclide therapy: Current clinical trial landscape. Front Med (Lausanne) 2023; 9:1076210. [PMID: 36687417 PMCID: PMC9859440 DOI: 10.3389/fmed.2022.1076210] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 12/06/2022] [Indexed: 01/09/2023] Open
Abstract
Astatine-211 (211At) has physical properties that make it one of the top candidates for use as a radiation source for alpha particle-based radionuclide therapy, also referred to as targeted alpha therapy (TAT). Here, we summarize the main results of the completed clinical trials, further describe ongoing trials, and discuss future prospects.
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Affiliation(s)
- Per Albertsson
- Department of Oncology, Sahlgrenska University Hospital, Gothenburg, Sweden,Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden,*Correspondence: Per Albertsson ✉
| | - Tom Bäck
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Karin Bergmark
- Department of Oncology, Sahlgrenska University Hospital, Gothenburg, Sweden,Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Andreas Hallqvist
- Department of Oncology, Sahlgrenska University Hospital, Gothenburg, Sweden,Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Mia Johansson
- Department of Oncology, Sahlgrenska University Hospital, Gothenburg, Sweden,Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Emma Aneheim
- Department of Oncology, Sahlgrenska University Hospital, Gothenburg, Sweden,Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Sture Lindegren
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Chiara Timperanza
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Knut Smerud
- Smerud Medical Research International AS, Oslo, Norway
| | - Stig Palm
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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Recent progress of astatine-211 in endoradiotherapy: Great advances from fundamental properties to targeted radiopharmaceuticals. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.03.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Radiolabeling chemistry with heavy halogens iodine and astatine. Nucl Med Mol Imaging 2022. [DOI: 10.1016/b978-0-12-822960-6.00013-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Maingueneau C, Berdal M, Eychenne R, Gaschet J, Chérel M, Gestin JF, Guérard F. 211At and 125I-labeling of (hetero)aryliodonium ylides: astatine wins again. Chemistry 2021; 28:e202104169. [PMID: 34965315 DOI: 10.1002/chem.202104169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Indexed: 11/09/2022]
Abstract
Despite the growing interest in radioiodine and 211 At-labeled radiopharmaceuticals, the search for radiolabeling reactions has been somewhat neglected, resulting in a limited number of available radiosynthetic strategies. Herein we report a comparative study of nucleophilic 125 I and 211 At-labeling of aryliodonium ylides. Whereas radioiodination efficiency was low, 211 At-labeling performed efficiently on a broad scope of precursors. The most activated aryliodonium ylides led rapidly to quantitative reactions at room temperature in acetonitrile. For deactivated precursors, heating up to 90°C in glyme and addition of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) as radical scavenger appeared essential to avoid precursor degradation and to achieve high radiochemical yields and molar activity. The approach was applied successfully to the preparation of 4-[ 211 At]astatophenylalanine (4-APA), an amino acid derivative increasingly studied as radiotherapeutic drug for cancers. This validated aryliodonium ylides as a valuable tool for nucleophilic 211 At-labeling and will complement the short but now growing list of available astatination reactions.
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Affiliation(s)
- Clémence Maingueneau
- CRCINA: ERL Centre de Cancerologie et d'Immunologie Nantes-Angers, team 13, 8 Quai Moncousu,, 44007, Nantes, FRANCE
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Pareri AU, Koijam AS, Kumar C. Breaking the Silence of Tumor Response: Future Prospects of Targeted Radionuclide Therapy. Anticancer Agents Med Chem 2021; 22:1845-1858. [PMID: 34477531 DOI: 10.2174/1871520621666210903152354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 07/12/2021] [Accepted: 07/19/2021] [Indexed: 01/10/2023]
Abstract
Therapy-induced tumor resistance has always been a paramount hurdle in the clinical triumph of cancer therapy. Resistance acquired by tumor through interventions of chemotherapeutic drugs, ionizing radiation, and immunotherapy in the patientsis a severe drawback and major cause of recurrence of tumor and failure of therapeutic responses. To counter acquired resistance in tumor cells, several strategies are practiced such as chemotherapy regimens, immunotherapy, and immunoconjugates, but the outcome is very disappointing for the patients as well as clinicians. Radionuclide therapy using alpha or beta-emitting radionuclide as payload became state-of-the-art for cancer therapy. With the improvement in dosimetric studies, development of high-affinity target molecules, and design of several novel chelating agents which provide thermodynamically stable complexes in vivo, the scope of radionuclide therapy has increased by leaps and bounds. Additionally, radionuclide therapy along with the combination of chemotherapy is gaining importance in pre-clinics, which is quite encouraging. Thus, it opens an avenue for newer cancer therapy modalities where chemotherapy, radiation therapy, and immunotherapy are unable to break the silence of tumor response. This article describes, in brief, the causes of tumor resistance and discusses the potential of radionuclide therapy to enhance tumor response.
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Affiliation(s)
| | | | - Chandan Kumar
- Radiopharmaceuticals Division, Bhabha Atomic Research Centre Mumbai-400085, India
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Guérard F, Maingueneau C, Liu L, Eychenne R, Gestin JF, Montavon G, Galland N. Advances in the Chemistry of Astatine and Implications for the Development of Radiopharmaceuticals. Acc Chem Res 2021; 54:3264-3275. [PMID: 34350753 DOI: 10.1021/acs.accounts.1c00327] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
ConspectusAstatine (At) is the rarest on Earth of all naturally occurring elements, situated below iodine in the periodic table. While only short-lived isotopes (t1/2 ≤ 8.1 h) are known, 211At is the object of growing attention due to its emission of high-energy alpha particles. Such radiation is highly efficient to eradicate disseminated tumors, provided that the radionuclide is attached to a cancer-targeting molecule. The interest in applications of 211At in nuclear medicine translates into the increasing number of cyclotrons able to produce it. Yet, many challenges related to the minute amounts of available astatine are to be overcome in order to characterize its physical and chemical properties. This point is of paramount importance to develop synthetic strategies and solve the labeling instability in current approaches that limits the use of 211At-labeled radiopharmaceuticals. Despite its discovery in the 1940s, only the past decade has seen a significant rise in the understanding of astatine's basic chemical and radiochemical properties, thanks to the development of new analytical and computational tools.In this Account, we give a concise summary of recent advances in the determination of the physicochemical properties of astatine, putting in perspective the duality of this element which exhibits the characteristics both of a halogen and of a metal. Striking features were evidenced in the recent determination of its Pourbaix diagram such as the identification of stable cationic species, At+ and AtO+, contrasting with other halogens. Like metals, these species were shown to form complexes with anionic ligands and to exhibit a particular affinity for organic species bearing soft donor atoms. On the other hand, astatine shares many characteristics with other halogen elements. For instance, the At- species exists in water, but with the least range of EH-pH stability in the halogen series. Astatine can form molecular interactions through halogen bonding, and it was only recently identified as the strongest halogen-bond donor. This ability is nonetheless affected by relativistic effects, which translate to other peculiarities for this heavy element. For instance, the spin-orbit coupling boosts astatine's propensity to form charge-shift bonds, catching up with the behavior of the lightest halogens (fluorine, chlorine).All these new data have an impact on the development of radiolabeling strategies to turn 211At into radiopharmaceuticals. Inspired by the chemistry of iodine, the chemical approaches have sparsely evolved over the past decades and have long been limited to electrophilic halodemetalation reactions to form astatoaryl compounds. Conversely, recent developments have favored the use of the more stable At- species including the aromatic nucleophilic substitution with diaryliodonium salts or the copper-catalyzed halodeboronation of arylboron precursors. However, it is clear that new bonding modalities are necessary to improve the in vivo stability of 211At-labeled aryl compounds. The tools and data gathered over the past decade will contribute to instigate original strategies for overcoming the challenges offered by this enigmatic element. Alternatives to the C-At bond such as the B-At and the metal-At bonds are typical examples of exciting new axes of research.
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Affiliation(s)
- François Guérard
- Université de Nantes, CNRS, Inserm, CRCINA, F-44000 Nantes, France
| | | | - Lu Liu
- IMT-Atlantique Bretagne-Pays de la Loire - Nantes Campus, SUBATECH, UMR CNRS 6457, F-44000 Nantes, France
| | - Romain Eychenne
- Université de Nantes, CNRS, Inserm, CRCINA, F-44000 Nantes, France
- Arronax GIP, F-44817 Saint-Herblain, France
| | | | - Gilles Montavon
- IMT-Atlantique Bretagne-Pays de la Loire - Nantes Campus, SUBATECH, UMR CNRS 6457, F-44000 Nantes, France
| | - Nicolas Galland
- Université de Nantes, CNRS, CEISAM UMR 6230, F-44000 Nantes, France
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Eychenne R, Chérel M, Haddad F, Guérard F, Gestin JF. Overview of the Most Promising Radionuclides for Targeted Alpha Therapy: The "Hopeful Eight". Pharmaceutics 2021; 13:pharmaceutics13060906. [PMID: 34207408 PMCID: PMC8234975 DOI: 10.3390/pharmaceutics13060906] [Citation(s) in RCA: 74] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 06/02/2021] [Accepted: 06/08/2021] [Indexed: 12/11/2022] Open
Abstract
Among all existing radionuclides, only a few are of interest for therapeutic applications and more specifically for targeted alpha therapy (TAT). From this selection, actinium-225, astatine-211, bismuth-212, bismuth-213, lead-212, radium-223, terbium-149 and thorium-227 are considered as the most suitable. Despite common general features, they all have their own physical characteristics that make them singular and so promising for TAT. These radionuclides were largely studied over the last two decades, leading to a better knowledge of their production process and chemical behavior, allowing for an increasing number of biological evaluations. The aim of this review is to summarize the main properties of these eight chosen radionuclides. An overview from their availability to the resulting clinical studies, by way of chemical design and preclinical studies is discussed.
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Affiliation(s)
- Romain Eychenne
- Groupement d’Intérêt Public ARRONAX, 1 Rue Aronnax, F-44817 Saint-Herblain, France;
- Université de Nantes, Inserm, CNRS, Centre de Recherche en Cancérologie et Immunologie Nantes—Angers (CRCINA)—UMR 1232, ERL 6001, F-44000 Nantes, France; (M.C.); (F.G.)
- Correspondence: (R.E.); (J.-F.G.)
| | - Michel Chérel
- Université de Nantes, Inserm, CNRS, Centre de Recherche en Cancérologie et Immunologie Nantes—Angers (CRCINA)—UMR 1232, ERL 6001, F-44000 Nantes, France; (M.C.); (F.G.)
| | - Férid Haddad
- Groupement d’Intérêt Public ARRONAX, 1 Rue Aronnax, F-44817 Saint-Herblain, France;
- Laboratoire Subatech, UMR 6457, Université de Nantes, IMT Atlantique, CNRS, Subatech, F-44000 Nantes, France
| | - François Guérard
- Université de Nantes, Inserm, CNRS, Centre de Recherche en Cancérologie et Immunologie Nantes—Angers (CRCINA)—UMR 1232, ERL 6001, F-44000 Nantes, France; (M.C.); (F.G.)
| | - Jean-François Gestin
- Université de Nantes, Inserm, CNRS, Centre de Recherche en Cancérologie et Immunologie Nantes—Angers (CRCINA)—UMR 1232, ERL 6001, F-44000 Nantes, France; (M.C.); (F.G.)
- Correspondence: (R.E.); (J.-F.G.)
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Berdal M, Gouard S, Eychenne R, Marionneau-Lambot S, Croyal M, Faivre-Chauvet A, Chérel M, Gaschet J, Gestin JF, Guérard F. Investigation on the reactivity of nucleophilic radiohalogens with arylboronic acids in water: access to an efficient single-step method for the radioiodination and astatination of antibodies. Chem Sci 2020; 12:1458-1468. [PMID: 34163909 PMCID: PMC8179031 DOI: 10.1039/d0sc05191h] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Easy access to radioiodinated and 211At-labelled bio(macro)molecules is essential to develop new strategies in nuclear imaging and targeted radionuclide therapy of cancers. Yet, the labelling of complex molecules with heavy radiohalogens is often poorly effective due to the multiple steps and intermediate purifications needed. Herein, we investigate the potential of arylboron chemistry as an alternative approach for the late stage labelling of antibodies. The reactivity of a model precursor, 4-chlorobenzeneboronic acid (1) with nucleophilic iodine-125 and astatine-211 was at first investigated in aqueous conditions. In the presence of a copper(ii) catalyst and 1,10-phenanthroline, quantitative radiochemical yields (RCYs) were achieved within 30 minutes at room temperature. The optimum conditions were then applied to a CD138 targeting monoclonal antibody (mAb) that has previously been validated for imaging and therapy in a preclinical model of multiple myeloma. RCYs remained high (>80% for 125I-labelling and >95% for 211At-labelling), and the whole procedure led to increased specific activities within less time in comparison with previously reported methods. Biodistribution study in mice indicated that targeting properties of the radiolabelled mAb were well preserved, leading to a high tumour uptake in a CD138 expressing tumour model. The possibility of divergent synthesis from a common modified carrier protein demonstrated herein opens facilitated perspectives in radiotheranostic applications with the radioiodine/211At pairs. Overall, the possibility to develop radiolabelling kits offered by this procedure should facilitate its translation to clinical applications. The high reactivity of astatine and iodine in water with arylboronic acids provides access to an efficient single-step antibody radiolabelling.![]()
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Affiliation(s)
- Marion Berdal
- Université de Nantes, CNRS, Inserm, CRCINA F-44000 Nantes France
| | - Sébastien Gouard
- Université de Nantes, CNRS, Inserm, CRCINA F-44000 Nantes France
| | - Romain Eychenne
- Université de Nantes, CNRS, Inserm, CRCINA F-44000 Nantes France .,Arronax GIP Saint-Herblain France
| | - Séverine Marionneau-Lambot
- Université de Nantes, CNRS, Inserm, CRCINA F-44000 Nantes France .,Department of Nuclear Medicine, CHU Nantes Nantes France
| | - Mikaël Croyal
- CRNH-O, Mass Spectrometry Core Facility F-44000 Nantes France.,NUN, INRA, CHU Nantes, UMR 1280, PhAN, IMAD, CRNH-O F-44000 Nantes France
| | - Alain Faivre-Chauvet
- Université de Nantes, CNRS, Inserm, CRCINA F-44000 Nantes France .,Department of Nuclear Medicine, CHU Nantes Nantes France
| | - Michel Chérel
- Université de Nantes, CNRS, Inserm, CRCINA F-44000 Nantes France .,ICO-René Gauducheau Saint-Herblain France
| | - Joëlle Gaschet
- Université de Nantes, CNRS, Inserm, CRCINA F-44000 Nantes France
| | | | - François Guérard
- Université de Nantes, CNRS, Inserm, CRCINA F-44000 Nantes France
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