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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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Sabri ME, Moghaddasi L, Wilson P, Saran F, Bezak E. Targeted Alpha Therapy for Glioblastoma: Review on In Vitro, In Vivo and Clinical Trials. Target Oncol 2024; 19:511-531. [PMID: 38836953 PMCID: PMC11230998 DOI: 10.1007/s11523-024-01071-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/13/2024] [Indexed: 06/06/2024]
Abstract
Glioblastoma (GB), a prevalent and highly malignant primary brain tumour with a very high mortality rate due to its resistance to conventional therapies and invasive nature, resulting in 5-year survival rates of only 4-17%. Despite recent advancements in cancer management, the survival rates for GB patients have not significantly improved over the last 10-20 years. Consequently, there exists a critical unmet need for innovative therapies. One promising approach for GB is Targeted Alpha Therapy (TAT), which aims to selectively deliver potentially therapeutic radiation doses to malignant cells and the tumour microenvironment while minimising radiation exposure to surrounding normal tissue with or without conventional external beam radiation. This approach has shown promise in both pre-clinical and clinical settings. A review was conducted following PRISMA 2020 guidelines across Medline, SCOPUS, and Embase, identifying 34 relevant studies out of 526 initially found. In pre-clinical studies, TAT demonstrated high binding specificity to targeted GB cells, with affinity rates between 60.0% and 84.2%, and minimal binding to non-targeted cells (4.0-5.6%). This specificity significantly enhanced cytotoxic effects and improved biodistribution when delivered intratumorally. Mice treated with TAT showed markedly higher median survival rates compared to control groups. In clinical trials, TAT applied to recurrent GB (rGB) displayed varying success rates in extending overall survival (OS) and progression-free survival. Particularly effective when integrated into treatment regimens for both newly diagnosed and recurrent cases, TAT increased the median OS by 16.1% in newly diagnosed GB and by 36.4% in rGB, compared to current standard therapies. Furthermore, it was generally well tolerated with minimal adverse effects. These findings underscore the potential of TAT as a viable therapeutic option in the management of GB.
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Affiliation(s)
- Maram El Sabri
- Allied Health and Human Performance, University of South Australia, University of South Australia City East Campus, Adelaide, SA, 5001, Australia.
| | - Leyla Moghaddasi
- Department of Medical Physics, Royal North Shore Hospital, Sydney, NSW, 2065, Australia
| | - Puthenparampil Wilson
- UniSA STEM, University of South Australia, Adelaide, SA, 5001, Australia
- Department of Medical Physics, Royal Adelaide Hospital, Adelaide, Australia
| | - Frank Saran
- Allied Health and Human Performance, University of South Australia, University of South Australia City East Campus, Adelaide, SA, 5001, Australia
- Australian Bragg Centre for Proton Therapy and Research, Adelaide, SA, 5000, Australia
- Department of Radiotherapy, Royal Adelaide Hospital, Adelaide, SA, 5000, Australia
| | - Eva Bezak
- Allied Health and Human Performance, University of South Australia, University of South Australia City East Campus, Adelaide, SA, 5001, Australia
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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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Riedesel AK, Bach-Hagemann A, Abdulbaki A, Talbot SR, Tolba R, Schwabe K, Lindauer U. Burrowing behaviour of rats: Strain differences and applicability as well-being parameter after intracranial surgery. Lab Anim 2022; 56:356-369. [PMID: 35144494 DOI: 10.1177/00236772211072977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In mice, burrowing is considered a species-typical parameter for assessing well-being, while this is less clear in rats. This exploratory study evaluated burrowing behaviour in three rat strains during training and in the direct postoperative phase after complex intracranial surgery in different neuroscience rat models established at Hannover Medical School or Aachen University Hospital. Male Crl:CD (SD; n = 18), BDIX/UlmHanZtm (BDIX; n = 8) and RjHan:WI (Wistar; n = 35) rats were individually trained to burrow gravel out of a tube on four consecutive days. Thereafter, BDIX rats were subjected to intracranial injection of BT4Ca cells and tumour resection (rat glioma model), SD rats to injection of 6-hydroxydopamine (6-OHDA) or vehicle (rat Parkinson's disease model) and Wistar rats to endovascular perforation or sham surgery (rat subarachnoid haemorrhage (SAH) model). Burrowing was retested on the day after surgery. During training, BDIX rats burrowed large amounts (mean of 2370 g on the fourth day), while SD and Wistar rats burrowed less gravel (means of 846 and 520 g, respectively). Burrowing increased significantly during training only in Wistar rats. Complex surgery, that is, tumour resection (BDIX), 6-OHDA injection (SD) and endovascular perforation or sham surgery for SAH (Wistar) significantly reduced burrowing and body weight, while simple stereotactic injection of tumour cells or vehicle did not affect burrowing. Despite the training, burrowing differed between the strains. In the direct postoperative phase, burrowing was reduced after complex surgery, indicating reduced well-being. Reduced burrowing was accompanied with postoperative weight loss, a validated and recognised quantitative measure for severity assessment.
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Affiliation(s)
| | - Annika Bach-Hagemann
- Translational Neurosurgery and Neurobiology, Department of Neurosurgery, 9165RWTH Aachen University, Medical Faculty, RWTH Aachen University, Germany
| | - Arif Abdulbaki
- Department of Neurosurgery, Hannover Medical School, Germany
| | - Steven R Talbot
- Institute for Laboratory Animal Science, Hannover Medical School, Germany
| | - René Tolba
- Institute for Laboratory Animal Science & Experimental Surgery, Medical Faculty, RWTH Aachen University, Germany
| | - Kerstin Schwabe
- Department of Neurosurgery, Hannover Medical School, Germany
| | - Ute Lindauer
- Translational Neurosurgery and Neurobiology, Department of Neurosurgery, 9165RWTH Aachen University, Medical Faculty, RWTH Aachen University, Germany
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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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Hanaoka H, Ohshima Y, Suzuki H, Sasaki I, Watabe T, Ooe K, Watanabe S, Ishioka NS. Enhancing the Therapeutic Effect of 2- 211At-astato-α-methyl-L-phenylalanine with Probenecid Loading. Cancers (Basel) 2021; 13:cancers13215514. [PMID: 34771676 PMCID: PMC8583516 DOI: 10.3390/cancers13215514] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 10/28/2021] [Indexed: 11/24/2022] Open
Abstract
Simple Summary To enhance the therapeutic effect of 2-211At-astato-α-methyl-L-phenylalanine (2-211At-AAMP), a radiopharmaceutical for targeted alpha therapy, we evaluated the effect of probenecid loading on its biodistribution and therapeutic effect in mice. Probenecid preloading significantly delayed the clearance of 2-211At-AAMP from the blood, increasing its accumulation in tumors. Consequently, the therapeutic effect of 2-211At-AAMP markedly improved. These results indicate that 2-211At-AAMP with probenecid loading is useful for the treatment of various types of cancers. Abstract L-type amino acid transporter 1 (LAT1) might be a useful target for tumor therapy since it is highly expressed in various types of cancers. We previously developed an astatine-211 (211At)-labeled amino acid derivative, 2-211At-astato-α-methyl-L-phenylalanine (2-211At-AAMP), and demonstrated its therapeutic potential for LAT1-positive cancers. However, the therapeutic effect of 2-211At-AAMP was insufficient, probably due to its low tumor retention. The preloading of probenecid, an organic anion transporter inhibitor, can delay the clearance of some amino acid tracers from the blood and consequently increase their accumulation in tumors. In this study, we evaluated the effect of probenecid preloading on the biodistribution and therapeutic effect of 2-211At-AAMP in mice. In biodistribution studies, the blood radioactivity of 2-211At-AAMP significantly increased with probenecid preloading. Consequently, the accumulation of 2-211At-AAMP in tumors was significantly higher with probenecid than without probenecid loading. In a therapeutic study, tumor growth was suppressed by 2-211At-AAMP with probenecid, and the tumor volume was significantly lower in the treatment group than in the untreated control group from day 2 to day 30 (end of the follow-up period) after treatment. These results indicate that probenecid loading could improve the therapeutic effect of 2-211At-AAMP by increasing its accumulation in tumors.
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Affiliation(s)
- Hirofumi Hanaoka
- Faculty of Medicine, Kansai Medical University, 2-5-1 Shin-machi, Hirakata 573-1010, Osaka, Japan
- Department of Radiotheranostics, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi 371-8511, Gunma, Japan
- Correspondence: ; Tel.: +81-72-804-2452
| | - Yasuhiro Ohshima
- Department of Radiation-Applied Biology Research, Quantum Beam Science Research Directorate, National Institute for Quantum Science and Technology, 1233 Watanuki-machi, Takasaki 370-1292, Gunma, Japan; (Y.O.); (I.S.); (S.W.); (N.S.I.)
| | - Hiroyuki Suzuki
- Department of Molecular Imaging and Radiotherapy, Graduate School of Pharmaceutical Science, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Chiba, Japan;
| | - Ichiro Sasaki
- Department of Radiation-Applied Biology Research, Quantum Beam Science Research Directorate, National Institute for Quantum Science and Technology, 1233 Watanuki-machi, Takasaki 370-1292, Gunma, Japan; (Y.O.); (I.S.); (S.W.); (N.S.I.)
| | - Tadashi Watabe
- Department of Nuclear Medicine and Tracer Kinetics, Graduate School of Medicine, Osaka University, 1-1 Yamadaoka, Suita 565-0871, Osaka, Japan; (T.W.); (K.O.)
| | - Kazuhiro Ooe
- Department of Nuclear Medicine and Tracer Kinetics, Graduate School of Medicine, Osaka University, 1-1 Yamadaoka, Suita 565-0871, Osaka, Japan; (T.W.); (K.O.)
| | - Shigeki Watanabe
- Department of Radiation-Applied Biology Research, Quantum Beam Science Research Directorate, National Institute for Quantum Science and Technology, 1233 Watanuki-machi, Takasaki 370-1292, Gunma, Japan; (Y.O.); (I.S.); (S.W.); (N.S.I.)
| | - Noriko S. Ishioka
- Department of Radiation-Applied Biology Research, Quantum Beam Science Research Directorate, National Institute for Quantum Science and Technology, 1233 Watanuki-machi, Takasaki 370-1292, Gunma, Japan; (Y.O.); (I.S.); (S.W.); (N.S.I.)
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Shirakami Y, Watabe T, Obata H, Kaneda K, Ooe K, Liu Y, Teramoto T, Toyoshima A, Shinohara A, Shimosegawa E, Hatazawa J, Fukase K. Synthesis of [ 211At]4-astato-L-phenylalanine by dihydroxyboryl-astatine substitution reaction in aqueous solution. Sci Rep 2021; 11:12982. [PMID: 34155314 PMCID: PMC8217504 DOI: 10.1038/s41598-021-92476-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 06/08/2021] [Indexed: 11/08/2022] Open
Abstract
Astatine-211 (211At)-labeled phenylalanine is expected to be a promising agent for targeted alpha-particle therapy for the treatment of patients with glioma. The existing reactions to prepare the labeled compound usually require organic solvents and metals that are toxic and hazardous to the environment. In this study, we developed a novel method wherein astatination was realized via the substitution of 211At for a dihydroxyboryl group coupled to phenylalanine. [211At]4-astato-L-phenylalanine was obtained as the carrier-free product in aqueous medium in high radiochemical yields (98.1 ± 1.9%, n = 5). The crude reaction mixture was purified by solid-phase extraction, and the radiochemical purity of the product was 99.3 ± 0.7% (n = 5). The high yield and purity were attributed to the formation of [211At]AtI and AtI2- as the reactive intermediates in the astatination reaction. The reaction did not require any organic solvents or toxic reagents, suggesting that this method is suitable for clinical applications.
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Affiliation(s)
- Yoshifumi Shirakami
- Institute for Radiation Sciences, Osaka University, Suita, 565-0871, Japan.
- Research Center for Nuclear Physics, Osaka University, Suita, 565-0871, Japan.
| | - Tadashi Watabe
- Institute for Radiation Sciences, Osaka University, Suita, 565-0871, Japan
- Department of Tracer Kinetics and Nuclear Medicine, Graduate School of Medicine, Osaka University, Suita, 565-0871, Japan
| | - Honoka Obata
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, 560-0043, Japan
| | - Kazuko Kaneda
- Institute for Radiation Sciences, Osaka University, Suita, 565-0871, Japan
| | - Kazuhiro Ooe
- Institute for Radiation Sciences, Osaka University, Suita, 565-0871, Japan
- Department of Tracer Kinetics and Nuclear Medicine, Graduate School of Medicine, Osaka University, Suita, 565-0871, Japan
| | - Yuwei Liu
- Department of Tracer Kinetics and Nuclear Medicine, Graduate School of Medicine, Osaka University, Suita, 565-0871, Japan
| | - Takahiro Teramoto
- Institute for Radiation Sciences, Osaka University, Suita, 565-0871, Japan
| | - Atsushi Toyoshima
- Institute for Radiation Sciences, Osaka University, Suita, 565-0871, Japan
| | - Atsushi Shinohara
- Institute for Radiation Sciences, Osaka University, Suita, 565-0871, Japan
- Department of Tracer Kinetics and Nuclear Medicine, Graduate School of Medicine, Osaka University, Suita, 565-0871, Japan
| | - Eku Shimosegawa
- Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Suita, 565-0871, Japan
| | - Jun Hatazawa
- Research Center for Nuclear Physics, Osaka University, Suita, 565-0871, Japan
| | - Koichi Fukase
- Institute for Radiation Sciences, Osaka University, Suita, 565-0871, Japan
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, 560-0043, Japan
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Ohshima Y, Suzuki H, Hanaoka H, Sasaki I, Watanabe S, Haba H, Arano Y, Tsushima Y, Ishioka NS. Preclinical evaluation of new α-radionuclide therapy targeting LAT1: 2-[ 211At]astato-α-methyl-L-phenylalanine in tumor-bearing model. Nucl Med Biol 2020; 90-91:15-22. [PMID: 32916470 DOI: 10.1016/j.nucmedbio.2020.08.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 08/24/2020] [Accepted: 08/25/2020] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Targeted α-radionuclide therapy has attracted attention as a promising therapy for refractory cancers. However, the application is limited to certain types of cancer. Since L-type amino acid transporter 1 (LAT1) is highly expressed in various human cancers, we prepared an LAT1-selective α-radionuclide-labeled amino acid analog, 2-[211At]astato-α-methyl-L-phenylalanine (2-[211At]AAMP), and evaluated its potential as a therapeutic agent. METHODS 2-[211At]AAMP was prepared from the stannyl precursor. Stability of 2-[211At]AAMP was evaluated both in vitro and in vivo. In vitro studies using an LAT1-expressing human ovarian cancer cell line, SKOV3, were performed to evaluate cellular uptake and cytotoxicity of 2-[211At]AAMP. Biodistribution and therapeutic studies in SKOV3-bearing mice were performed after intravenous injection of 2-[211At]AAMP. RESULTS 2-[211At]AAMP was stable in murine plasma in vitro and excreted intact into urine. Cellular uptake of 2-[211At]AAMP was inhibited by treatment with an LAT1-selective inhibitor. After 24 h incubation, 2-[211At]AAMP suppressed clonogenic growth at 10 kBq/ml, and induced cell death and DNA double-strand breaks at 25 kBq/ml. When injected into mice, 2-[211At]AAMP exhibited peak accumulation in the tumor at 30 min postinjection, and radioactivity levels in the tumor were retained up to 60 min. The majority of the radioactivity was rapidly eliminated from the body into urine in an intact form immediately after injection. 2-[211At]AAMP significantly improved the survival of mice (P < 0.05) without serious side effects. CONCLUSION 2-[211At]AAMP showed α-radiation-dependent cellular growth inhibition after it was taken up via LAT1. In addition, 2-[211At]AAMP had a beneficial effect on survival in vivo. These findings suggest that 2-[211At]AAMP would be useful for the treatment of LAT1-positive cancer. ADVANCES IN KNOWLEDGE AND IMPLICATIONS FOR PATIENT CARE This is the first report of an LAT1-targeting radiopharmaceutical for α-radionuclide therapy; this agent would be applicable for the treatment of various types of cancer.
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Affiliation(s)
- Yasuhiro Ohshima
- Department of Radiation-Applied Biology Research, Quantum Beam Science Research Directorate, National Institute for Quantum and Radiological Science and Technology, 1233 Watanuki-machi, Takasaki, Gunma 370-1292, Japan.
| | - Hiroyuki Suzuki
- Department of Molecular Imaging and Radiotherapy, Graduate School of Pharmaceutical Science, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba 260-8675, Japan
| | - Hirofumi Hanaoka
- Department of Bioimaging Information Analysis, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma 371-8511, Japan
| | - Ichiro Sasaki
- Department of Radiation-Applied Biology Research, Quantum Beam Science Research Directorate, National Institute for Quantum and Radiological Science and Technology, 1233 Watanuki-machi, Takasaki, Gunma 370-1292, Japan
| | - Shigeki Watanabe
- Department of Radiation-Applied Biology Research, Quantum Beam Science Research Directorate, National Institute for Quantum and Radiological Science and Technology, 1233 Watanuki-machi, Takasaki, Gunma 370-1292, Japan
| | - Hiromitsu Haba
- Superheavy Element Production Team, Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yasushi Arano
- Department of Molecular Imaging and Radiotherapy, Graduate School of Pharmaceutical Science, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba 260-8675, Japan
| | - Yoshito Tsushima
- Department of Bioimaging Information Analysis, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma 371-8511, Japan
| | - Noriko S Ishioka
- Department of Radiation-Applied Biology Research, Quantum Beam Science Research Directorate, National Institute for Quantum and Radiological Science and Technology, 1233 Watanuki-machi, Takasaki, Gunma 370-1292, Japan
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Watabe T, Kaneda-Nakashima K, Shirakami Y, Liu Y, Ooe K, Teramoto T, Toyoshima A, Shimosegawa E, Nakano T, Kanai Y, Shinohara A, Hatazawa J. Targeted alpha therapy using astatine ( 211At)-labeled phenylalanine: A preclinical study in glioma bearing mice. Oncotarget 2020; 11:1388-1398. [PMID: 32341757 PMCID: PMC7170498 DOI: 10.18632/oncotarget.27552] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 03/14/2020] [Indexed: 12/13/2022] Open
Abstract
Phenylalanine derivatives, which target tumors especially through L-type amino acid transporter-1 (LAT1), have elicited considerable attention. In this study, we evaluated the treatment effect of phenylalanine labeled with the alpha emitter astatine (211At-PA) in tumor bearing mice. The C6 glioma, U-87MG, and GL261 cell lines were subjected to a cellular 211At-PA uptake analysis that included an evaluation of the uptake inhibition by the system L amino acid transporter inhibitor 2-aminobicyclo-(2,2,1)-heptane-2-carboxylic acid (BCH). BCH significantly inhibited para-211At-PA uptake in C6 glioma (12.2 ± 0.8%), U-87MG (27.6 ± 1.1%), and GL261 (12.6 ± 2.0%) cells compared to baseline, suggesting an uptake contribution by system L amino acid transporters. Subsequently, xenograft and allograft models were prepared by subcutaneously injecting C6 glioma (n = 12) or GL-261 cells (n = 12), respectively. C6 glioma mice received three 211At-PA doses (0.1, 0.5, or 1 MBq, n = 3/dose), while GL261 mice received one high dose (1 MBq, n = 7). 211At-PA exhibited a tumor growth suppression effect in C6 glioma models in a dose-dependent manner as well as in GL-261 models. This phenylalanine derivative labeled with astatine may be applicable as an alpha therapy that specifically targets system L amino acid transporters.
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Affiliation(s)
- Tadashi Watabe
- Department of Nuclear Medicine and Tracer Kinetics, Graduate School of Medicine, Osaka University, Suita, Japan.,Institute for Radiation Sciences, Osaka University, Suita, Japan
| | - Kazuko Kaneda-Nakashima
- Institute for Radiation Sciences, Osaka University, Suita, Japan.,Core for Medicine and Science Collaborative Research and Education, Project Research Center for Fundamental Sciences, Graduate School of Science, Osaka University, Toyonaka, Japan
| | | | - Yuwei Liu
- Department of Nuclear Medicine and Tracer Kinetics, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Kazuhiro Ooe
- Department of Nuclear Medicine and Tracer Kinetics, Graduate School of Medicine, Osaka University, Suita, Japan.,Institute for Radiation Sciences, Osaka University, Suita, Japan
| | | | | | - Eku Shimosegawa
- Institute for Radiation Sciences, Osaka University, Suita, Japan.,Department of Molecular Imaging in Medicine, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Takashi Nakano
- Institute for Radiation Sciences, Osaka University, Suita, Japan.,Research Center for Nuclear Physics, Osaka University, Ibaraki, Japan
| | - Yoshikatsu Kanai
- Department of Bio-system Pharmacology, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Atsushi Shinohara
- Institute for Radiation Sciences, Osaka University, Suita, Japan.,Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Japan
| | - Jun Hatazawa
- Institute for Radiation Sciences, Osaka University, Suita, Japan.,Research Center for Nuclear Physics, Osaka University, Ibaraki, Japan
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10
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Hanaoka H, Ohshima Y, Yamaguchi A, Suzuki H, Ishioka NS, Higuchi T, Arano Y, Tsushima Y. Novel 18F-Labeled α-Methyl-Phenylalanine Derivative with High Tumor Accumulation and Ideal Pharmacokinetics for Tumor-Specific Imaging. Mol Pharm 2019; 16:3609-3616. [DOI: 10.1021/acs.molpharmaceut.9b00446] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Hirofumi Hanaoka
- Department of Bioimaging Information Analysis, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
| | - Yasuhiro Ohshima
- Project “Medical Radioisotope Application”, Department of Radiation-Applied Biology Research, Takasaki Advanced Radiation Research Institute, Quantum Beam Advanced Research Directorate, National Institutes for Quantum and Radiological Science and Technology (QST), Takasaki 370-1292, Japan
| | - Aiko Yamaguchi
- Department of Bioimaging Information Analysis, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
| | - Hiroyuki Suzuki
- Department of Molecular Imaging and Radiotherapy, Graduate School of Pharmaceutical Science, Chiba University, Chiba 260-8675, Japan
| | - Noriko S. Ishioka
- Project “Medical Radioisotope Application”, Department of Radiation-Applied Biology Research, Takasaki Advanced Radiation Research Institute, Quantum Beam Advanced Research Directorate, National Institutes for Quantum and Radiological Science and Technology (QST), Takasaki 370-1292, Japan
| | - Tetsuya Higuchi
- Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
| | - Yasushi Arano
- Department of Molecular Imaging and Radiotherapy, Graduate School of Pharmaceutical Science, Chiba University, Chiba 260-8675, Japan
| | - Yoshito Tsushima
- Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
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11
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Watanabe S, Azim MAU, Nishinaka I, Sasaki I, Ohshima Y, Yamada K, Ishioka NS. A convenient and reproducible method for the synthesis of astatinated 4-[ 211At]astato-l-phenylalanine via electrophilic desilylation. Org Biomol Chem 2019; 17:165-171. [PMID: 30534678 DOI: 10.1039/c8ob02394h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The 211At-labeled compound, 4-[211At]astato-l-phenylalanine, is one of the most promising amino acid derivatives for use in targeted alpha therapy (TAT) for various cancers. Electrophilic demetallation of a stannyl precursor is the most widely used approach for labeling biomolecules with 211At. However, the low acid-resistance of the stannyl precursor necessitates the use of an N- and C-terminus-protected precursor, which results in a low overall radiochemical yield (RCY) due to the multiple synthetic steps involved. In this study, a deprotected organosilyl compound, 4-triethylsilyl-l-phenylalanine, was employed for the direct synthesis of astatinated phenylalanines. 211At was separately recovered from the irradiated 209Bi target using chloroform (CHCl3) and N-chlorosuccinimide-methanol (NCS-MeOH) solution. The RCYs of 4-[211At]astato-l-phenylalanine obtained from the triethylsilyl precursor with the use of 211At, isolated in CHCl3 and NCS-MeOH solution, were 75% and 64% respectively. In both cases, the retention time of the 4-[211At]astato-l-phenylalanine was found to be about 20 min, which showed reasonable correlation with the retention time of non-radioactive 4-halo-l-phenylalanines (4-chloro-, 4-bromo-, and 4-iodo-l-phenylalanine). The one-step reaction examined in this study involved mild reaction conditions (70 °C) and a short time (10 min) compared to the other currently reported procedures for astatination. Electrophilic desilylation was found to be very effective for the labeling of aromatic amino acids with 211At.
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Affiliation(s)
- Shigeki Watanabe
- Department of Radiation-Applied Biology, Takasaki Advanced Radiation Research Institute, National Institutes of Quantum and Radiological Science and Technology (QST), 1233 Watanuki, Takasaki, Gunma 370-1292, Japan.
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12
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Wu Z, Nakamura M, Krauss JK, Schwabe K, John N. Intracranial rat glioma model for tumor resection and local treatment. J Neurosci Methods 2018; 299:1-7. [PMID: 29425709 DOI: 10.1016/j.jneumeth.2018.02.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 01/25/2018] [Accepted: 02/02/2018] [Indexed: 12/23/2022]
Abstract
BACKGROUND Although tumor resection is among the most important prognostic factors, high grade gliomas regrow in most cases. Also, resection of glial tumors in eloquent brain regions is not or only partially possible. Despite these severe restraints, however, only a few in-vivo models have been established to investigate tumor recurrence and local treatment. Here we characterize the intracranial BT4Ca rat glioma as a model for these aspects. NEW METHOD BT4Ca cells were stereotaxically implanted into the frontal cortex of BDIX rats. Rats were than allocated to (1) a control group, which received no further treatment; (2) a catheter group, where a catheter was implanted for repeated microinjection of vehicle every 3rd day as catheter-control; (3) a resection group, where the tumor was microsurgically removed eight days after cell injection. Postoperatively, survival time, weight and general health condition were scored and the tumor size was histologically assessed. RESULTS Injection of BT4Ca cells induced fast-growing tumors with a mean survival time of 16 days in the control and catheter groups. Resection significantly prolonged survival time whereby the tumor regrew in all rats. Tumor size was similar between all groups. COMPARISON WITH EXISTING METHOD(S) We here present a robust and reliable intracranial rat glioma model, which is suitable to simulate tumor recurrence after surgical resection and local treatment. Importantly, this model does not require advanced imaging or elaborate surgical techniques. CONCLUSIONS The intracranial BT4Ca glioma model appears to be a feasible tool to investigate tumor recurrence after resection and to test local treatment.
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Affiliation(s)
- Zhiqun Wu
- Department of Neurosurgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Makoto Nakamura
- Department of Neurosurgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Joachim K Krauss
- Department of Neurosurgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Kerstin Schwabe
- Department of Neurosurgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Nadine John
- Department of Neurosurgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany.
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13
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Radiation-Induced Growth Retardation and Microstructural and Metabolite Abnormalities in the Hippocampus. Neural Plast 2016; 2016:3259621. [PMID: 27242931 PMCID: PMC4875992 DOI: 10.1155/2016/3259621] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 02/11/2016] [Accepted: 04/05/2016] [Indexed: 11/17/2022] Open
Abstract
Cranial radiotherapy (CRT) increases survival in pediatric brain-tumor patients but can cause deleterious effects. This study evaluates the acute and long-term impact of CRT delivered during childhood/adolescence on the brain and body using a rodent model. Rats received CRT, either 4 Gy fractions × 5 d (fractionated) or a cumulative dose of 20 Gy (single dose) at 28 d of age. Animals were euthanized 1 d, 5 d, or 3.5 mo after CRT. The 3.5 mo group was imaged prior to euthanasia. At 3.5 mo, we observed significant growth retardation in irradiated animals, versus controls, and the effects of single dose on brain and body weights were more severe than fractionated. Acutely single dose significantly reduced body weight but increased brain weight, whereas fractionation significantly reduced brain but not body weights, versus controls. CRT suppressed cell proliferation in the hippocampal subgranular zone acutely. Fractional anisotropy (FA) in the fimbria was significantly lower in the single dose versus controls. Hippocampal metabolite levels were significantly altered in the single dose animals, reflecting a heightened state of inflammation that was absent in the fractionated. Our findings indicate that despite the differences in severity between the doses they both demonstrated an effect on cell proliferation and growth retardation, important factors in pediatric CRT.
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