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Gape PMD, Schultz MK, Stasiuk GJ, Terry SYA. Towards Effective Targeted Alpha Therapy for Neuroendocrine Tumours: A Review. Pharmaceuticals (Basel) 2024; 17:334. [PMID: 38543120 PMCID: PMC10974115 DOI: 10.3390/ph17030334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 02/22/2024] [Accepted: 02/26/2024] [Indexed: 04/01/2024] Open
Abstract
This review article explores the evolving landscape of Molecular Radiotherapy (MRT), emphasizing Peptide Receptor Radionuclide Therapy (PRRT) for neuroendocrine tumours (NETs). The primary focus is on the transition from β-emitting radiopharmaceuticals to α-emitting agents in PRRT, offering a critical analysis of the radiobiological basis, clinical applications, and ongoing developments in Targeted Alpha Therapy (TAT). Through an extensive literature review, the article delves into the mechanisms and effectiveness of PRRT in targeting somatostatin subtype 2 receptors, highlighting both its successes and limitations. The discussion extends to the emerging paradigm of TAT, underlining its higher potency and specificity with α-particle emissions, which promise enhanced therapeutic efficacy and reduced toxicity. The review critically evaluates preclinical and clinical data, emphasizing the need for standardised dosimetry and a deeper understanding of the dose-response relationship in TAT. The review concludes by underscoring the significant potential of TAT in treating SSTR2-overexpressing cancers, especially in patients refractory to β-PRRT, while also acknowledging the current challenges and the necessity for further research to optimize treatment protocols.
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Affiliation(s)
- Paul M. D. Gape
- School of Biomedical Engineering & Imaging Sciences, King’s College London, London SE1 7EP, UK; (G.J.S.); (S.Y.A.T.)
| | - Michael K. Schultz
- Departments of Radiology, Radiation Oncology, Free Radical and Radiation Biology Program, University of Iowa, Iowa City, IA 52242, USA;
- Perspective Therapeutics, Coralville, IA 52241, USA
| | - Graeme J. Stasiuk
- School of Biomedical Engineering & Imaging Sciences, King’s College London, London SE1 7EP, UK; (G.J.S.); (S.Y.A.T.)
| | - Samantha Y. A. Terry
- School of Biomedical Engineering & Imaging Sciences, King’s College London, London SE1 7EP, UK; (G.J.S.); (S.Y.A.T.)
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Vasić V, Gustafsson J, Nowshahr EY, Stenvall A, Beer AJ, Gleisner KS, Glatting G. A PBPK model for PRRT with [ 177Lu]Lu-DOTA-TATE: Comparison of model implementations in SAAM II and MATLAB/SimBiology. Phys Med 2024; 119:103299. [PMID: 38367588 DOI: 10.1016/j.ejmp.2024.103299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 12/06/2023] [Accepted: 01/23/2024] [Indexed: 02/19/2024] Open
Abstract
Physiologically based pharmacokinetic (PBPK) models offer the ability to simulate and predict the biodistribution of radiopharmaceuticals and have the potential to enable individualised treatment planning in molecular radiotherapy. The objective of this study was to develop and implement a whole-body compartmental PBPK model for peptide receptor radionuclide therapy (PRRT) with [177Lu]Lu-DOTA-TATE in SimBiology to allow for more complex analyses. The correctness of the model implementation was ensured by comparing its outputs, such as the time-integrated activity (TIA), with those of a PBPK model implemented in SAAM II software. METHODS A combined PBPK model for [68Ga]Ga-DOTA-TATE and [177Lu]Lu-DOTA-TATE was developed and implemented in both SAAM II and SimBiology. A retrospective analysis of 12 patients with metastatic neuroendocrine tumours (NETs) was conducted. First, time-activity curves (TACs) and TIAs from the two software were calculated and compared for identical parameter values. Second, pharmacokinetic parameters were fitted to activity concentrations, analysed and compared. RESULTS The PBPK model implemented in SimBiology produced TIA results comparable to those generated by the model implemented in SAAM II, with a relative deviation of less than 0.5% when using the same input parameters. The relative deviation of the fitted TIAs was less than 5% when model parameter values were fitted to the measured activity concentrations. CONCLUSION The proposed PBPK model implemented in SimBiology can be used for dosimetry in radioligand therapy and TIA prediction. Its outputs are similar to those generated by the PBPK model implemented in SAAM II, confirming the correctness of the model implementation in SimBiology.
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Affiliation(s)
- Valentina Vasić
- Department of Nuclear Medicine, Ulm University, Ulm, Germany; Medical Radiation Physics, Department of Nuclear Medicine, Ulm University, Ulm, Germany.
| | | | - Elham Yousefzadeh Nowshahr
- Department of Nuclear Medicine, Ulm University, Ulm, Germany; Medical Radiation Physics, Department of Nuclear Medicine, Ulm University, Ulm, Germany
| | - Anna Stenvall
- Medical Radiation Physics, Lund University, Lund, Sweden
| | - Ambros J Beer
- Department of Nuclear Medicine, Ulm University, Ulm, Germany
| | | | - Gerhard Glatting
- Department of Nuclear Medicine, Ulm University, Ulm, Germany; Medical Radiation Physics, Department of Nuclear Medicine, Ulm University, Ulm, Germany
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Burkett BJ, Bartlett DJ, McGarrah PW, Lewis AR, Johnson DR, Berberoğlu K, Pandey MK, Packard AT, Halfdanarson TR, Hruska CB, Johnson GB, Kendi AT. A Review of Theranostics: Perspectives on Emerging Approaches and Clinical Advancements. Radiol Imaging Cancer 2023; 5:e220157. [PMID: 37477566 PMCID: PMC10413300 DOI: 10.1148/rycan.220157] [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: 11/08/2022] [Revised: 03/06/2023] [Accepted: 05/31/2023] [Indexed: 07/22/2023]
Abstract
Theranostics is the combination of two approaches-diagnostics and therapeutics-applied for decades in cancer imaging using radiopharmaceuticals or paired radiopharmaceuticals to image and selectively treat various cancers. The clinical use of theranostics has increased in recent years, with U.S. Food and Drug Administration (FDA) approval of lutetium 177 (177Lu) tetraazacyclododecane tetraacetic acid octreotate (DOTATATE) and 177Lu-prostate-specific membrane antigen vector-based radionuclide therapies. The field of theranostics has imminent potential for emerging clinical applications. This article reviews critical areas of active clinical advancement in theranostics, including forthcoming clinical trials advancing FDA-approved and emerging radiopharmaceuticals, approaches to dosimetry calculations, imaging of different radionuclide therapies, expanded indications for currently used theranostic agents to treat a broader array of cancers, and emerging ideas in the field. Keywords: Molecular Imaging, Molecular Imaging-Cancer, Molecular Imaging-Clinical Translation, Molecular Imaging-Target Development, PET/CT, SPECT/CT, Radionuclide Therapy, Dosimetry, Oncology, Radiobiology © RSNA, 2023.
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Affiliation(s)
- Brian J. Burkett
- From the Department of Radiology (B.J.B., D.J.B., D.R.J., M.K.P.,
A.T.P., C.B.H., G.B.J., A.T.K.) and Division of Medical Oncology (P.W.M.,
A.R.L., T.R.H.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and
Department of Nuclear Medicine, Anadolu Medical Center, Gebze/Kocaeli, Turkey
(K.B.)
| | - David J. Bartlett
- From the Department of Radiology (B.J.B., D.J.B., D.R.J., M.K.P.,
A.T.P., C.B.H., G.B.J., A.T.K.) and Division of Medical Oncology (P.W.M.,
A.R.L., T.R.H.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and
Department of Nuclear Medicine, Anadolu Medical Center, Gebze/Kocaeli, Turkey
(K.B.)
| | - Patrick W. McGarrah
- From the Department of Radiology (B.J.B., D.J.B., D.R.J., M.K.P.,
A.T.P., C.B.H., G.B.J., A.T.K.) and Division of Medical Oncology (P.W.M.,
A.R.L., T.R.H.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and
Department of Nuclear Medicine, Anadolu Medical Center, Gebze/Kocaeli, Turkey
(K.B.)
| | - Akeem R. Lewis
- From the Department of Radiology (B.J.B., D.J.B., D.R.J., M.K.P.,
A.T.P., C.B.H., G.B.J., A.T.K.) and Division of Medical Oncology (P.W.M.,
A.R.L., T.R.H.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and
Department of Nuclear Medicine, Anadolu Medical Center, Gebze/Kocaeli, Turkey
(K.B.)
| | - Derek R. Johnson
- From the Department of Radiology (B.J.B., D.J.B., D.R.J., M.K.P.,
A.T.P., C.B.H., G.B.J., A.T.K.) and Division of Medical Oncology (P.W.M.,
A.R.L., T.R.H.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and
Department of Nuclear Medicine, Anadolu Medical Center, Gebze/Kocaeli, Turkey
(K.B.)
| | - Kezban Berberoğlu
- From the Department of Radiology (B.J.B., D.J.B., D.R.J., M.K.P.,
A.T.P., C.B.H., G.B.J., A.T.K.) and Division of Medical Oncology (P.W.M.,
A.R.L., T.R.H.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and
Department of Nuclear Medicine, Anadolu Medical Center, Gebze/Kocaeli, Turkey
(K.B.)
| | - Mukesh K. Pandey
- From the Department of Radiology (B.J.B., D.J.B., D.R.J., M.K.P.,
A.T.P., C.B.H., G.B.J., A.T.K.) and Division of Medical Oncology (P.W.M.,
A.R.L., T.R.H.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and
Department of Nuclear Medicine, Anadolu Medical Center, Gebze/Kocaeli, Turkey
(K.B.)
| | - Annie T. Packard
- From the Department of Radiology (B.J.B., D.J.B., D.R.J., M.K.P.,
A.T.P., C.B.H., G.B.J., A.T.K.) and Division of Medical Oncology (P.W.M.,
A.R.L., T.R.H.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and
Department of Nuclear Medicine, Anadolu Medical Center, Gebze/Kocaeli, Turkey
(K.B.)
| | - Thorvardur R. Halfdanarson
- From the Department of Radiology (B.J.B., D.J.B., D.R.J., M.K.P.,
A.T.P., C.B.H., G.B.J., A.T.K.) and Division of Medical Oncology (P.W.M.,
A.R.L., T.R.H.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and
Department of Nuclear Medicine, Anadolu Medical Center, Gebze/Kocaeli, Turkey
(K.B.)
| | - Carrie B. Hruska
- From the Department of Radiology (B.J.B., D.J.B., D.R.J., M.K.P.,
A.T.P., C.B.H., G.B.J., A.T.K.) and Division of Medical Oncology (P.W.M.,
A.R.L., T.R.H.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and
Department of Nuclear Medicine, Anadolu Medical Center, Gebze/Kocaeli, Turkey
(K.B.)
| | - Geoffrey B. Johnson
- From the Department of Radiology (B.J.B., D.J.B., D.R.J., M.K.P.,
A.T.P., C.B.H., G.B.J., A.T.K.) and Division of Medical Oncology (P.W.M.,
A.R.L., T.R.H.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and
Department of Nuclear Medicine, Anadolu Medical Center, Gebze/Kocaeli, Turkey
(K.B.)
| | - A. Tuba Kendi
- From the Department of Radiology (B.J.B., D.J.B., D.R.J., M.K.P.,
A.T.P., C.B.H., G.B.J., A.T.K.) and Division of Medical Oncology (P.W.M.,
A.R.L., T.R.H.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and
Department of Nuclear Medicine, Anadolu Medical Center, Gebze/Kocaeli, Turkey
(K.B.)
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Gnesin S, Chouin N, Cherel M, Dunn SM, Schaefer N, Faivre-Chauvet A, Prior JO, Delage JA. From bench to bedside: 64Cu/ 177Lu 1C1m-Fc anti TEM-1: mice-to-human dosimetry extrapolations for future theranostic applications. EJNMMI Res 2023; 13:59. [PMID: 37314509 DOI: 10.1186/s13550-023-01010-4] [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: 04/24/2023] [Accepted: 06/06/2023] [Indexed: 06/15/2023] Open
Abstract
The development of diagnostic and therapeutic radiopharmaceuticals is an hot topic in nuclear medicine. Several radiolabeled antibodies are under development necessitating both biokinetic and dosimetry extrapolations for effective human translation. The validation of different animal-to-human dosimetry extrapolation methods still is an open issue. This study reports the mice-to-human dosimetry extrapolation of 64Cu/177Lu 1C1m-Fc anti-TEM-1 for theranostic application in soft-tissue sarcomas. We adopt four methods; direct mice-to-human extrapolation (M1); dosimetry extrapolation considering a relative mass scaling factor (M2), application of a metabolic scaling factor (M3) and combination of M2 and M3 (M4). Predicted in-human dosimetry for the [64Cu]Cu-1C1m-Fc resulted in an effective dose of 0.05 mSv/MBq. Absorbed dose (AD) extrapolation for the [177Lu]Lu-1C1m-Fc indicated that the AD of 2 Gy and 4 Gy to the red-marrow and total-body can be reached with 5-10 GBq and 25-30 GBq of therapeutic activity administration respectively depending on applied dosimetry method. Dosimetry extrapolation methods provided significantly different absorbed doses in organs. Dosimetry properties for the [64Cu]Cu-1C1m-Fc are suitable for a diagnostic in-human use. The therapeutic application of [177Lu]Lu-1C1m-Fc presents challenges and would benefit from further assessments in animals' models such as dogs before moving into the clinic.
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Affiliation(s)
- Silvano Gnesin
- Institute of Radiation Physics, Lausanne University Hospital and University of Lausanne, 1011, Lausanne, Switzerland
| | - Nicolas Chouin
- Inserm, CNRS, University of Angers, Oniris, CRCI2NA, University of Nantes, Nantes, France
| | - Michel Cherel
- CHU Nantes, CNRS, Inserm, CRCINA, University of Nantes, 44000, Nantes, France
| | - Steven Mark Dunn
- LAbCore, Ludwig Institute for Cancer Research, Lausanne University Hospital and University of Lausanne, 1066, Epalinges, Switzerland
| | - Niklaus Schaefer
- Department of Nuclear Medicine and Molecular Imaging, Lausanne University Hospital and University of Lausanne, Rue du Bugnon 46, 1011, Lausanne, Switzerland
| | | | - John O Prior
- Department of Nuclear Medicine and Molecular Imaging, Lausanne University Hospital and University of Lausanne, Rue du Bugnon 46, 1011, Lausanne, Switzerland.
| | - Judith Anna Delage
- Radiopharmacy Unit, Department of Pharmacy, Lausanne University Hospital and University of Lausanne, 1011, Lausanne, Switzerland
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