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Wakabayashi N, Watanabe S, Abe T, Takenaka J, Hirata K, Kimura R, Sakamoto K, Shinohara N, Kudo K. Safety and efficacy of multiple-dose versus single-dose MIBG therapy in patients with refractory pheochromocytoma and paraganglioma: a single-center retrospective analysis. Ann Nucl Med 2024; 38:553-562. [PMID: 38656630 DOI: 10.1007/s12149-024-01928-2] [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: 01/23/2024] [Accepted: 03/28/2024] [Indexed: 04/26/2024]
Abstract
OBJECTIVE To investigate the incidence of adverse events (AEs) following single and multiple administrations of I-131 metaiodobenzylguanidine (MIBG) therapy for inoperable pheochromocytomas and paragangliomas (PPGLs). METHODS A single-center retrospective study was conducted on patients with inoperable PPGLs who underwent I-131 MIBG therapy between January 2000 and December 2020. A total of 28 patients with available electronic medical records were included. The treatment consisted of a single intravenous administration of 150 mCi (5.55 GBq) of I-131 MIBG. We evaluated the first MIBG treatment and repeated MIBG treatments performed within 200 days of the previous treatment. AEs for each treatment were evaluated using CTCAE version 4.0, and the statistical analysis was conducted at a significance level of p < 0.05. Objective response based on RECIST 1.1 criteria and biochemical response based on urinary catecholamines were assessed. RESULTS The study included a total of 63 administrations, consisting of 28 single administrations (SAs), including the first administration for all 28 cases, and 35 multiple administrations (MAs), which included the second or later administrations. Hematological AEs were evaluable for 23 SAs and 29 MAs. Grade 3 or higher leukopenia occurred in 9.8% of all administrations, and Grade 3 or higher lymphopenia in 23.5%; both were manageable through observation. There were no significant differences in clinical AE Grades 1-2 (p = 0.32), hematological AE Grades 1-2 (p = 0.22), or hematological AE Grades 3-4 (p = 0.12) between MAs and SAs. Statistical analysis for each type of AE revealed significant increases in leukopenia (p < 0.01) and lymphopenia (p = 0.04). No significant difference in anemia, thrombocytopenia, or neutropenia was observed between MAs and SAs. There was no significant increase in the incidence rate of Grade 3 or higher hematological AEs for any of the parameters. The objective response rate was 0% for SAs and 36% for MAs. Biochemical response rates were 18% for SAs and 67% for MAs. CONCLUSION In I-131 MIBG therapy for PPGLs, multiple administrations significantly increased only Grade 1 or 2 lymphopenia and leukopenia compared to single administration.
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Affiliation(s)
- Naoto Wakabayashi
- Department of Nuclear Medicine, Hokkaido University Hospital, Kita14, Nishi5, Kita-Ku, Sapporo, Hokkaido, 060-8648, Japan
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Kita14, Nishi5, Kita-Ku, Sapporo, Hokkaido, 060-8648, Japan
- Department of Diagnostic Imaging, Graduate School of Medicine, Hokkaido University, Kita15, Nishi7, Kita-Ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Shiro Watanabe
- Department of Nuclear Medicine, Hokkaido University Hospital, Kita14, Nishi5, Kita-Ku, Sapporo, Hokkaido, 060-8648, Japan.
- Department of Diagnostic Imaging, Graduate School of Medicine, Hokkaido University, Kita15, Nishi7, Kita-Ku, Sapporo, Hokkaido, 060-8638, Japan.
| | - Takashige Abe
- Department of Renal and Genitourinary Surgery, Hokkaido University Graduate School of Medicine, Kita15, Nishi7, Kita-Ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Junki Takenaka
- Department of Nuclear Medicine, Hokkaido University Hospital, Kita14, Nishi5, Kita-Ku, Sapporo, Hokkaido, 060-8648, Japan
- Department of Diagnostic Imaging, Graduate School of Medicine, Hokkaido University, Kita15, Nishi7, Kita-Ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Kenji Hirata
- Department of Nuclear Medicine, Hokkaido University Hospital, Kita14, Nishi5, Kita-Ku, Sapporo, Hokkaido, 060-8648, Japan
- Department of Diagnostic Imaging, Graduate School of Medicine, Hokkaido University, Kita15, Nishi7, Kita-Ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Rina Kimura
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Kita14, Nishi5, Kita-Ku, Sapporo, Hokkaido, 060-8648, Japan
- Department of Diagnostic Imaging, Graduate School of Medicine, Hokkaido University, Kita15, Nishi7, Kita-Ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Keita Sakamoto
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Kita14, Nishi5, Kita-Ku, Sapporo, Hokkaido, 060-8648, Japan
- Department of Diagnostic Imaging, Graduate School of Medicine, Hokkaido University, Kita15, Nishi7, Kita-Ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Nobuo Shinohara
- Department of Renal and Genitourinary Surgery, Hokkaido University Graduate School of Medicine, Kita15, Nishi7, Kita-Ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Kohsuke Kudo
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Kita14, Nishi5, Kita-Ku, Sapporo, Hokkaido, 060-8648, Japan
- Department of Diagnostic Imaging, Graduate School of Medicine, Hokkaido University, Kita15, Nishi7, Kita-Ku, Sapporo, Hokkaido, 060-8638, Japan
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Wang P, Li T, Liu Z, Jin M, Su Y, Zhang J, Jing H, Zhuang H, Li F. [ 18F]MFBG PET/CT outperforming [ 123I]MIBG SPECT/CT in the evaluation of neuroblastoma. Eur J Nucl Med Mol Imaging 2023; 50:3097-3106. [PMID: 37160439 DOI: 10.1007/s00259-023-06221-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 04/02/2023] [Indexed: 05/11/2023]
Abstract
PURPOSE Iodine 123 labeled meta-iodobenzylguanidine ([123I]MIBG) scan with SPECT/CT imaging is one of the most commonly used imaging modalities in the evaluation of neuroblastoma. [18F]-meta-fluorobenzylguanidine ([18F]MFBG) is a novel positron emission tomography (PET) tracer which was reported to have a similar biodistribution to [123I]MIBG. However, the experience of using [18F]MFBG PET/CT in the evaluation of patients with neuroblastoma is limited. This preliminary investigation aims to assess the efficacy of [18F]MFBG PET/CT in the evaluation of neuroblastomas in comparison to [123I]MIBG scans with SPECT/CT. MATERIALS AND METHODS In this prospective, single-center study, 40 participants (mean age 6.0 ± 3.7 years) with history of neuroblastoma were enrolled. All children underwent both [123I]MIBG SPECT/CT and [18F]MFBG PET/CT studies. The number of lesions and the Curie scores revealed by each imaging method were recorded. RESULTS Six patients had negative findings on both [123I]MIBG and [18F]MFBG studies. Four of the 34 patients (11.8%) were negative on [123I]MIBG but positive on [18F]MFBG, while 30 patients were positive on both [123I]MIBG and [18F]MFBG studies. In these 34 patients, [18F]MFBG PET/CT identified 784 lesions while [123I]MIBG SPECT/CT detected 532 lesions (p < 0.001). The Curie scores obtained from [18F]MFBG PET/CT (11.32 ± 8.18, range 1-27) were statistically higher (p < 0.001) than those from [123I]MIBG SPECT/CT (7.74 ± 7.52, range 0-26). 30 of 34 patients (88.2%) with active disease on imaging had higher Curie scores based on the [18F]MFBG study than on the [123I]MIBG imaging. CONCLUSION [18F]MFBG PET/CT shows higher lesion detection rate than [123I]MIBG SPECT/CT in the evaluation of pediatric patients with neuroblastoma. CLINICAL TRIAL REGISTRATION Clinicaltrials.gov : NCT05069220 (Registered: 25 September 2021, retrospectively registered); Institute Review Board of Peking Union Medical College Hospital: ZS-2514.
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Affiliation(s)
- Peipei Wang
- Department of Nuclear Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing Key Laboratory of Molecular Targeted Diagnosis and Therapy in Nuclear Medicine, Beijing, People's Republic of China
| | - Tuo Li
- Department of Nuclear Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing Key Laboratory of Molecular Targeted Diagnosis and Therapy in Nuclear Medicine, Beijing, People's Republic of China
| | - Zhikai Liu
- Department of Radiation Oncology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, and Peking Union Medical College, Beijing, People's Republic of China
| | - Mei Jin
- Department of Medical Oncology, Pediatric Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, People's Republic of China
| | - Yan Su
- Department of Medical Oncology, Pediatric Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, People's Republic of China.
| | - Jingjing Zhang
- Clinical Imaging Research Centre, Centre for Translational Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Hongli Jing
- Department of Nuclear Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing Key Laboratory of Molecular Targeted Diagnosis and Therapy in Nuclear Medicine, Beijing, People's Republic of China.
| | - Hongming Zhuang
- Department of Radiology, Children's Hospital of Philadelphia University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
| | - Fang Li
- Department of Nuclear Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing Key Laboratory of Molecular Targeted Diagnosis and Therapy in Nuclear Medicine, Beijing, People's Republic of China.
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Muacevic A, Adler JR. Late Local and Distant Recurrence of Apparently Benign Paraganglioma. Cureus 2022; 14:e29874. [PMID: 36348854 PMCID: PMC9629821 DOI: 10.7759/cureus.29874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/01/2022] [Indexed: 11/24/2022] Open
Abstract
Paraganglioma-pheochromocytoma (PPGLs) are relatively rare catecholamine-secreting tumors of chromaffin origin. Due to the sympathetic effects of catecholamine excess, their presentation may range from non-specific symptoms to dangerous hypertensive crises. We present the case of a 36-year-old lady with recurrent paraganglioma (PGL) who presented in emergency with hypertensive crisis. She had a history of surgery for left-sided PGL 18 years earlier. Imaging showed local recurrence with pulmonary metastases and blood biochemistry showed raised urinary metanephrines. In view of her poor general condition, we undertook a staged surgical approach for management. She first underwent en-bloc excision of recurrent PGL with left nephrectomy. Nine weeks later, she underwent a pulmonary metastasectomy. This staged surgical approach resulted in the stabilization of blood pressure and normalization of urinary catecholamine. Although most of these tumors are indolent by nature, this case highlights the metastatic potential of apparently benign PGL. This case explores the possibility of a staged surgical approach in a high-risk patient and emphasizes the need for long-term follow-up in these cases.
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Abstract
In recent years, cancer care has been transformed by immune-based and targeted treatments. Although these treatments are effective against various solid organ malignancies, multiple adverse effects can occur, including thyroid dysfunction. In this review, the authors consider treatments for solid organ cancers that affect the thyroid, focusing on immune checkpoint inhibitors, kinase inhibitors, and radioactive iodine-conjugated treatments (I-131-metaiodobenzylguanidine). They discuss the mechanisms causing thyroid dysfunction, provide a framework for their diagnosis and management, and explore the association of thyroid dysfunction from these agents with patient survival.
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Affiliation(s)
- Anupam Kotwal
- Division of Diabetes, Endocrinology and Metabolism, Department of Internal Medicine, University of Nebraska Medical Center, 984120 Nebraska Medical Center, Omaha, NE 68198, USA. https://twitter.com/DrAKotwal
| | - Donald S A McLeod
- Department of Endocrinology and Diabetes, Royal Brisbane and Women's Hospital, Butterfield Street, Herston, Queensland 4029, Australia; Population Health Department, QIMR Berghofer Medical Research Institute, Locked Bag 2000, Royal Brisbane Hospital, Queensland 4029, Australia.
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Taniguchi Y, Wakabayashi H, Yoneyama H, Chen Z, Morino K, Otosaki A, Yamada M, Inaki A, Kayano D, Kinuya S. Application of a tungsten apron for occupational radiation exposure in nursing care of children with neuroblastoma during 131I-meta-iodo-benzyl-guanidine therapy. Sci Rep 2022; 12:47. [PMID: 34996922 PMCID: PMC8742119 DOI: 10.1038/s41598-021-03843-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 12/13/2021] [Indexed: 11/09/2022] Open
Abstract
The use of effective shielding materials against radiation is important among medical staff in nuclear medicine. Hence, the current study investigated the shielding effects of a commercially available tungsten apron using gamma ray measuring instruments. Further, the occupational radiation exposure of nurses during 131I-meta-iodo-benzyl-guanidine (131I-MIBG) therapy for children with high-risk neuroblastoma was evaluated. Attachable tungsten shields in commercial tungsten aprons were set on a surface-ray source with 131I, which emit gamma rays. The mean shielding rate value was 0.1 ± 0.006 for 131I. The shielding effects of tungsten and lead aprons were evaluated using a scintillation detector. The shielding effect rates of lead and tungsten aprons against 131I was 6.3% ± 0.3% and 42.1% ± 0.2% at 50 cm; 6.1% ± 0.5% and 43.3% ± 0.3% at 1 m; and 6.4% ± 0.9% and 42.6% ± 0.6% at 2 m, respectively. Next, we assessed the occupational radiation exposure during 131I-MIBG therapy (administration dose: 666 MBq/kg, median age: 4 years). The total occupational radiation exposure dose per patient care per 131I-MIBG therapy session among nurses was 0.12 ± 0.07 mSv. The average daily radiation exposure dose per patient care among nurses was 0.03 ± 0.03 mSv. Tungsten aprons had efficient shielding effects against gamma rays and would be beneficial to reduce radiation exposures per patient care per 131I-MIBG therapy session.
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Affiliation(s)
- Yuka Taniguchi
- Division of Nursing, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Hiroshi Wakabayashi
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan.
| | - Hiroto Yoneyama
- Department of Radiological Technology, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Zhuoqing Chen
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Kei Morino
- Division of Nursing, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Akiko Otosaki
- Division of Nursing, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Masako Yamada
- Division of Nursing, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Anri Inaki
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Daiki Kayano
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Seigo Kinuya
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
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Inaki A, Shiga T, Tsushima Y, Jinguji M, Wakabayashi H, Kayano D, Akatani N, Yamase T, Kunita Y, Watanabe S, Hiromasa T, Mori H, Hirata K, Watanabe S, Higuchi T, Tomonaga H, Kinuya S. An open-label, single-arm, multi-center, phase II clinical trial of single-dose [ 131I]meta-iodobenzylguanidine therapy for patients with refractory pheochromocytoma and paraganglioma. Ann Nucl Med 2021; 36:267-278. [PMID: 34870794 PMCID: PMC8897386 DOI: 10.1007/s12149-021-01699-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 11/17/2021] [Indexed: 12/16/2022]
Abstract
OBJECTIVE In this phase II study, we aimed to investigate the efficacy and safety of single-dose [131I]meta-iodobenzylguanidine (131I-mIBG) therapy in patients with refractory pheochromocytoma and paraganglioma (PPGL). PATIENTS AND METHODS This study was designed as an open-label, single-arm, multi-center, phase II clinical trial. The enrolled patients were administered 7.4 GBq of 131I-mIBG. Its efficacy was evaluated 12 and 24 weeks later, and its safety was monitored continuously until the end of the study. We evaluated the biochemical response rate as the primary endpoint using the one-sided exact binomial test based on the null hypothesis (≤ 5%). RESULTS Seventeen patients were enrolled in this study, of which 16 were treated. The biochemical response rate (≥ 50% decrease in urinary catecholamines) was 23.5% (90% confidence interval: 8.5-46.1%, p = 0.009). The radiographic response rates, determined with CT/MRI according to the response evaluation criteria in solid tumors (RECIST) version 1.1 and 123I-mIBG scintigraphy were 5.9% (0.3%-25.0%) and 29.4% (12.4%-52.2%), respectively. The most frequent non-hematologic treatment-emergent adverse events (TEAEs) were gastrointestinal symptoms including nausea, appetite loss, and constipation, which were, together, observed in 15 of 16 patients. Hematologic TEAEs up to grade 3 were observed in 14 of 16 patients. No grade 4 or higher TEAEs were observed. All patients had experienced at least one TEAE, but no fatal or irreversible TEAEs were observed. CONCLUSION A single dose 131I-mIBG therapy was well tolerated by patients with PPGL, and statistically significantly reduced catecholamine levels compared to the threshold response rate, which may lead to an improved prognosis for these patients.
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Affiliation(s)
- Anri Inaki
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa 920-8641 Japan
| | - Tohru Shiga
- Department of Clinical Research and Trial, Advanced Clinical Research Center, Fukushima Global Medical Science Center, Fukushima Medical University, 1-banchi Hikarigaoka, Fukushima, Fukushima 960-1295 Japan
| | - Yoshito Tsushima
- Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma 371-8511 Japan
| | - Megumi Jinguji
- Department of Radiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima City, Kagoshima 890-8544 Japan
| | - Hiroshi Wakabayashi
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa 920-8641 Japan
| | - Daiki Kayano
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa 920-8641 Japan
| | - Norihito Akatani
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa 920-8641 Japan
| | - Takafumi Yamase
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa 920-8641 Japan
| | - Yuji Kunita
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa 920-8641 Japan
| | - Satoru Watanabe
- Department of Functional Imaging and Artificial Intelligence, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa 920-8641 Japan
| | - Tomo Hiromasa
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa 920-8641 Japan
| | - Hiroshi Mori
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa 920-8641 Japan
| | - Kenji Hirata
- Department of Diagnostic Imaging, Hokkaido University Graduate School of Medicine, 5-chome Kita-14-jou, Kita-ku, Sapporo, Hokkaido 060-8648 Japan
| | - Shiro Watanabe
- Department of Diagnostic Imaging, Hokkaido University Graduate School of Medicine, 5-chome Kita-14-jou, Kita-ku, Sapporo, Hokkaido 060-8648 Japan
| | - Tetsuya Higuchi
- Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma 371-8511 Japan
| | - Hiroyasu Tomonaga
- Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma 371-8511 Japan
| | - Seigo Kinuya
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa 920-8641 Japan
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Kuroda R, Wakabayashi H, Araki R, Inaki A, Nishimura R, Ikawa Y, Yoshimura K, Murayama T, Imai Y, Funasaka T, Wada T, Kinuya S. Phase I/II clinical trial of high-dose [ 131I] meta-iodobenzylguanidine therapy for high-risk neuroblastoma preceding single myeloablative chemotherapy and haematopoietic stem cell transplantation. Eur J Nucl Med Mol Imaging 2021; 49:1574-1583. [PMID: 34837510 DOI: 10.1007/s00259-021-05630-7] [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: 09/01/2021] [Accepted: 11/21/2021] [Indexed: 12/22/2022]
Abstract
PURPOSE Paediatric high-risk neuroblastoma has poor prognosis despite modern multimodality therapy. This phase I/II study aimed to determine the safety, dose-limiting toxicity (DLT), and efficacy of high-dose 131I-meta-iodobenzylguanidine (131I-mIBG) therapy combined with single high-dose chemotherapy (HDC) and haematopoietic stem cell transplantation (HSCT) in high-risk neuroblastoma in Japan. METHODS Patients received 666 MBq/kg of 131I-mIBG and single HDC and HSCT from autologous or allogeneic stem cell sources. The primary endpoint was DLT defined as adverse events associated with 131I-mIBG treatment posing a significant obstacle to subsequent HDC. The secondary endpoints were adverse events/reactions, haematopoietic stem cell engraftment and responses according to the Response Evaluation Criteria in Solid Tumours version 1.1 (RECIST 1.1) and 123I-mIBG scintigraphy. Response was evaluated after engraftment. RESULTS We enrolled eight patients with high-risk neuroblastoma (six females; six newly diagnosed and two relapsed high-risk neuroblastoma; median age, 4 years; range, 1-10 years). Although all patients had adverse events/reactions after high-dose 131I-mIBG therapy, we found no DLT. Adverse events and reactions were observed in 100% and 25% patients during single HDC and 100% and 12.5% patients during HSCT, respectively. No Grade 4 complications except myelosuppression occurred during single HDC and HSCT. The response rate according to RECIST 1.1 was observed in 87.5% (7/8) in stable disease and 12.5% (1/8) were not evaluated. Scintigraphic response occurred in 62.5% (5/8) and 37.5% (3/8) patients in complete response and stable disease, respectively. CONCLUSION 131I-mIBG therapy with 666 MBq/kg followed by single HDC and autologous or allogeneic SCT is safe and efficacious in patients with high-risk neuroblastoma and has no DLT. TRIAL REGISTRATION NUMBER jRCTs041180030. NAME OF REGISTRY Feasibility of high-dose iodine-131-meta-iodobenzylguanidine therapy for high-risk neuroblastoma preceding myeloablative chemotherapy and haematopoietic stem cell transplantation (High-dose iodine-131-meta-iodobenzylguanidine therapy for high-risk neuroblastoma). URL OF REGISTRY: https://jrct.niph.go.jp/en-latest-detail/jRCTs041180030 . DATE OF ENROLMENT OF THE FIRST PARTICIPANT TO THE TRIAL 12/01/2018.
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Affiliation(s)
- Rie Kuroda
- Department of Paediatrics, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Hiroshi Wakabayashi
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan.
| | - Raita Araki
- Department of Paediatrics, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Anri Inaki
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Ryosei Nishimura
- Department of Paediatrics, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Yasuhiro Ikawa
- Department of Paediatrics, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Kenichi Yoshimura
- Medical Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, 734-8551, Japan
| | - Toshinori Murayama
- Department of Clinical Development, Kanazawa University Hospital, 13-1 Takara-machi, Ishikawa, 920-8641, Japan
| | - Yasuhito Imai
- Innovative Clinical Research Center, Kanazawa University Hospital, 13-1 Takara-machi, Ishikawa, 920-8641, Japan
| | - Tatsuyoshi Funasaka
- Innovative Clinical Research Center, Kanazawa University Hospital, 13-1 Takara-machi, Ishikawa, 920-8641, Japan
| | - Taizo Wada
- Department of Paediatrics, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Seigo Kinuya
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
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Prognostic factors for refractory pheochromocytoma and paraganglioma after 131I-metaiodobenzylguanidine therapy. Ann Nucl Med 2021; 36:61-69. [PMID: 34647244 DOI: 10.1007/s12149-021-01685-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 10/06/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Given the rarity of refractory pheochromocytoma and paraganglioma (PPGL), outcomes and prognostic factors after 131I-metaiodobenzylguanidine (131I-mIBG) treatment still remain unclear. Therefore, this study evaluated whether baseline characteristics at initial 131I-mIBG therapy and imaging response to repeated 131I-mIBG therapy could be prognostic factors for refractory PPGL. METHODS All patients [n = 59 (male/female = 35/24), median age; 49.3 years] with refractory PPGL who received 131I-mIBG therapy at our institution between September 2009 and September 2019 were retrospectively reviewed for the effects of the following factors on overall survival: age, sex, hypertension, diabetes mellitus, palpitations, constipation, cancer pain, catecholamines values, past history of therapy (external beam radiation for bone metastasis, operation, and chemotherapy), metastasis sites, and response to 131I-mIBG treatments. RESULTS Throughout the follow-up period, 18 patients died from disease exacerbation. The estimated 5- and 10-year survival rates were 79.4% and 67.2% from the initial diagnoses of refractory PPGL and 68.5% and 49.9% from the first 131I-mIBG therapy, respectively. The multivariate Cox proportional hazards model showed that progressive disease (PD) [hazard ratio (HR) 96.3, P = 0.011] and constipation (HR 8.2, P = 0.024) were adverse prognostic factors for overall survival after initial 131I-mIBG therapy. The log-rank test demonstrated that PD in response to 131I-mIBG therapies (P < 0.0001) and constipation (P < 0.01) were correlated with poor survival rates. CONCLUSIONS Response to repeated 131I-mIBG treatment can be a strong predictor of prognosis after initial 131I-mIBG therapy for refractory PPGL. Repeated 131I-mIBG therapy may be a good option for controlling refractory PPGL.
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Clinical Perspectives of Theranostics. Molecules 2021; 26:molecules26082232. [PMID: 33924345 PMCID: PMC8070270 DOI: 10.3390/molecules26082232] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 03/29/2021] [Accepted: 04/06/2021] [Indexed: 12/24/2022] Open
Abstract
Theranostics is a precision medicine which integrates diagnostic nuclear medicine and radionuclide therapy for various cancers throughout body using suitable tracers and treatment that target specific biological pathways or receptors. This review covers traditional theranostics for thyroid cancer and pheochromocytoma with radioiodine compounds. In addition, recent theranostics of radioimmunotherapy for non-Hodgkin lymphoma, and treatment of bone metastasis using bone seeking radiopharmaceuticals are described. Furthermore, new radiopharmaceuticals for prostatic cancer and pancreatic cancer have been added. Of particular, F-18 Fluoro-2-Deoxyglucose (FDG) Positron Emission Tomography (PET) is often used for treatment monitoring and estimating patient outcome. A recent clinical study highlighted the ability of alpha-radiotherapy with high linear energy transfer (LET) to overcome treatment resistance to beta--particle therapy. Theranostics will become an ever-increasing part of clinical nuclear medicine.
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Yoshinaga K, Abe T, Okamoto S, Uchiyama Y, Manabe O, Ito YM, Tamura N, Ito N, Yoshioka N, Washino K, Shinohara N, Tamaki N, Shiga T. Effects of Repeated 131I- Meta-Iodobenzylguanidine Radiotherapy on Tumor Size and Tumor Metabolic Activity in Patients with Metastatic Neuroendocrine Tumors. J Nucl Med 2020; 62:685-694. [PMID: 33067337 DOI: 10.2967/jnumed.120.250803] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 09/15/2020] [Indexed: 12/30/2022] Open
Abstract
131I-meta-iodobenzylguanidine (131I-MIBG) radiotherapy has shown some survival benefits in metastatic neuroendocrine tumors (NETs). European Association of Nuclear Medicine clinical guidelines for 131I-MIBG radiotherapy suggest a repeated treatment protocol, although none currently exists. The existing single-high-dose 131I-MIBG radiotherapy (444 MBq/kg) has been shown to have some benefits for patients with metastatic NETs. However, this protocol increases adverse effects and requires alternative therapeutic approaches. Therefore, the aim of this study was to evaluate the effects of repeated 131I-MIBG therapy on tumor size and tumor metabolic response in patients with metastatic NETs. Methods: Eleven patients with metastatic NETs (aged 49.2 ± 16.3 y) prospectively received repeated 5,550-MBq doses of 131I-MIBG therapy at 6-mo intervals. In total, 31 treatments were performed. The mean number of treatments was 2.8 ± 0.4, and the cumulative 131I-MIBG dose was 15,640.9 ± 2,245.1 MBq (286.01 MBq/kg). Tumor response was observed by CT and 18F-FDG PET or by 18F-FDG PET/CT before and 3-6 mo after the final 131I-MIBG treatment. Results: On the basis of the CT findings with RECIST, 3 patients showed a partial response and 6 patients showed stable disease. The remaining 2 patients showed progressive disease. Although there were 2 progressive-disease patients, analysis of all patients showed no increase in summed length diameter (median, 228.7 mm [interquartile range (IQR), 37.0-336.0 mm] to 171.0 mm [IQR, 38.0-270.0 mm]; P = 0.563). In tumor region-based analysis with partial-response and stable-disease patients (n = 9), 131I-MIBG therapy significantly reduced tumor diameter (79 lesions; median, 16 mm [IQR, 12-22 mm] to 11 mm [IQR, 6-16 mm]; P < 0.001). Among 5 patients with hypertension, there was a strong trend toward systolic blood pressure reduction (P = 0.058), and diastolic blood pressure was significantly reduced (P = 0.006). Conclusion: Eighty-two percent of metastatic NET patients effectively achieved inhibition of disease progression, with reduced tumor size and reduced metabolic activity, through repeated 131I-MIBG therapy. Therefore, this relatively short-term repeated 131I-MIBG treatment may have potential as one option in the therapeutic protocol for metastatic NETs. Larger prospective studies with control groups are warranted.
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Affiliation(s)
- Keiichiro Yoshinaga
- Diagnostic and Therapeutic Nuclear Medicine, Quantum and Radiological Science and Technology, National Institute of Radiological Sciences, Chiba, Japan
| | - Takashige Abe
- Department of Urological Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Shozo Okamoto
- Department of Diagnostic Radiology, Hokkaido University Graduate School of Medicine, Sapporo, Japan .,Department of Radiology, Obihiro Kosei Hospital, Obihiro, Japan
| | - Yuko Uchiyama
- Department of Diagnostic Radiology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Osamu Manabe
- Department of Diagnostic Radiology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Yoichi M Ito
- Research Center for Medical and Health Data Science, Institute of Statistical Mathematics, Tokyo, Japan; and
| | - Naomi Tamura
- Research Center for Medical and Health Data Science, Institute of Statistical Mathematics, Tokyo, Japan; and
| | - Natsue Ito
- Diagnostic and Therapeutic Nuclear Medicine, Quantum and Radiological Science and Technology, National Institute of Radiological Sciences, Chiba, Japan
| | - Naho Yoshioka
- Diagnostic and Therapeutic Nuclear Medicine, Quantum and Radiological Science and Technology, National Institute of Radiological Sciences, Chiba, Japan
| | - Komei Washino
- Diagnostic and Therapeutic Nuclear Medicine, Quantum and Radiological Science and Technology, National Institute of Radiological Sciences, Chiba, Japan
| | - Nobuo Shinohara
- Department of Urological Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Nagara Tamaki
- Department of Radiology, Kyoto Prefectural Medical University, Kyoto, Japan
| | - Tohru Shiga
- Department of Diagnostic Radiology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Diagnostic Use of Post-therapy 131I-Meta-Iodobenzylguanidine Scintigraphy in Consolidation Therapy for Children with High-Risk Neuroblastoma. Diagnostics (Basel) 2020; 10:diagnostics10090663. [PMID: 32887257 PMCID: PMC7555271 DOI: 10.3390/diagnostics10090663] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/23/2020] [Accepted: 09/01/2020] [Indexed: 12/27/2022] Open
Abstract
123I-meta-iodobenzylguanidine (123I-mIBG) scintigraphy is used for evaluating disease extent in children with neuroblastoma. 131I-mIBG therapy has been used for evaluation in children with high-risk neuroblastoma, and post-therapy 131I-mIBG scintigraphy may detect more lesions compared with diagnostic 123I-mIBG scintigraphy. However, no studies have yet revealed the detection rate of hidden mIBG-avid lesions on post-therapy 131I-mIBG whole-body scan (WBS) and SPECT images in neuroblastoma children without mIBG-avid lesions as demonstrated by diagnostic 123I-mIBG scintigraphy. We retrospectively examined the diagnostic utility of post-therapy 131I-mIBG scintigraphy in children who received 131I-mIBG as consolidation therapy. Nineteen children with complete response to primary therapy were examined. Post-therapy 131I-mIBG scintigraphy was performed four days after injection. The post-therapy 131I-mIBG scintigraphy, 4 children exhibited abnormal uptake on the WBS. Post-therapy 131I-mIBG SPECT/CT provided additional information in 2 cases. In total, 6 children exhibited abnormal uptake. The site of abnormal accumulation was on the recurrence site in one case, operation sites in five cases, and bone metastasis in one case. Post-therapy 131I-mIBG scintigraphy could detect residual disease that was not recognized using diagnostic 123I-mIBG scintigraphy in 32% of children with high-risk neuroblastoma and ganglioneuroblastoma. The diagnostic use of post-therapy 131I-mIBG scintigraphy can provide valuable information for detecting residual disease.
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Taniguchi Y, Wakabayashi H, Inaki A, Kayano D, Yamada M, Kinuya S. Radiation exposure in nurses during care of 131I-MIBG therapy for pediatric patients with high-risk neuroblastoma. Ann Nucl Med 2020; 34:441-447. [PMID: 32297135 DOI: 10.1007/s12149-020-01466-7] [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: 01/23/2020] [Accepted: 04/05/2020] [Indexed: 11/29/2022]
Abstract
OBJECTIVE 131I-meta-iodo-benzyl-guanidine (131I-MIBG) therapy has been used in children with high-risk neuroblastoma, who, in Japan, are cared for by trained nurses. To determine the safety of occupational radiation exposure in nurses, we retrospectively examined radiation exposure during therapy. METHODS Sixty-two nurses who received radiation exposure during 131I-MIBG therapy were assessed for the daily percentage of total radiation exposure received using the formula, daily radiation exposure/total radiation dose × 100; self-care score of children was evaluated. RESULTS Fifty-four 131I-MIBG treatments (592 ± 111 MBq/kg) were performed in neuroblastoma patients (M/F; 27 /27, mean age at 131I-MIBG treatment; 7 ± 2 years), who were isolated for 5 ± 1 days. Average total (0.36 ± 0.18 mSv; range 0.09-0.97 mSv) and daily (0.07 ± 0.05 mSv/day; range 0.02-0.32 mSv/day) radiation exposure to nurses per patient care. The daily percentage of total radiation exposure significantly decreased in 3 days after 131I-MIBG treatment (days 0, 1, and 2 was 38.2 ± 14.7%, 26.9 ± 12.6%, and 15.3 ± 7.1%, respectively), and the average self-care score was 12.2 ± 3.5 (10-27) for all patients. Higher self-care score was significantly related to younger patients' age and higher daily radiation exposure in nurses. CONCLUSION Individual exposure to radiation was well controlled. Nurses who care for pediatric patients needing daily assistance must be aware of the radiation exposure risks, which can be reduced by establishing a care system and monitoring radiation exposure.
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Affiliation(s)
- Yuka Taniguchi
- Division of Nursing, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Hiroshi Wakabayashi
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan.
| | - Anri Inaki
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Daiki Kayano
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Masako Yamada
- Division of Nursing, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Seigo Kinuya
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
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A phase I clinical trial for [ 131I]meta-iodobenzylguanidine therapy in patients with refractory pheochromocytoma and paraganglioma. Sci Rep 2019; 9:7625. [PMID: 31110198 PMCID: PMC6527850 DOI: 10.1038/s41598-019-43880-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 05/03/2019] [Indexed: 12/13/2022] Open
Abstract
Refractory pheochromocytoma and paraganglioma (PPGL) have a poor prognosis and the treatment strategy remains to be established. This multi-institutional phase I study was performed to determine the safety, dose-limiting toxicity (DLT), and efficacy of [131I]-meta-iodobenzylguanidine (131I-mIBG) therapy for refractory PPGLs. Twenty patients with refractory PPGL were enrolled in this study. We administered fixed doses of 131I-mIBG to all patients, delivering a second and third course of 131I-mIBG to eight and three patients, respectively. During the 20 weeks after 131I-mIBG injection, the authors surveyed the adverse events in accordance with the Common Terminology Criteria for Adverse Events. All patients experienced adverse events and adverse reactions, but none experienced a grade 4 adverse event. Twelve weeks after 131I-mIBG injection, examinations for the evaluation of therapeutic effects was performed in accordance with the Response Evaluation Criteria in Solid Tumours (RECIST). The best overall response rates (based on RECIST categories) were 10% (complete response), 65% (stable disease), 15% (progressive disease), and 10% (not all evaluated). The efficacy and safety of 131I-mIBG therapy was shown in patients with refractory PPGL, and DLT was observed in neither single nor repeated 131I-mIBG therapy, indicating a tolerability for 131I-mIBG therapy.
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Kinuya S. Activities for the Development of Targeted Radionuclide Therapy in Japan. Nucl Med Mol Imaging 2019; 53:35-37. [PMID: 30828398 DOI: 10.1007/s13139-018-0563-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 12/04/2018] [Accepted: 12/07/2018] [Indexed: 01/06/2023] Open
Abstract
Targeted radionuclide therapy (TRT) is unique because of its efficacy and its theranostic feature in the era of precision medicine. So far, introduction of new TRT has not been going well in Japan due to several reasons including strict regulations, shortage of facilities for TRT, and insufficient reimbursement for TRT in clinic. Japanese community had several strategies to develop TRT in these 10 years, including the establishment of the National Conference for Nuclear Medicine Theranostics in which physicians, scientists, patients, people supporting patients, and industrial people gather. To promote TRT with supports from the government, the preparatory committee for the establishment of Japan Foundation of Medical Isotope Development (JAFMID) was launched. I would like to call TRT "Precision Nuclear Medicine." When we can add genomic information here, we can put it to new stage of cancer therapy. It is time for us.
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Affiliation(s)
- Seigo Kinuya
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takaramachi, Kanazawa, Ishikawa 920-8641 Japan
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Kayano D, Kinuya S. Current Consensus on I-131 MIBG Therapy. Nucl Med Mol Imaging 2018; 52:254-265. [PMID: 30100938 DOI: 10.1007/s13139-018-0523-z] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 03/27/2018] [Accepted: 04/12/2018] [Indexed: 12/24/2022] Open
Abstract
Metaiodobenzylguanidine (MIBG) is structurally similar to the neurotransmitter norepinephrine and specifically targets neuroendocrine cells including some neuroendocrine tumors. Iodine-131 (I-131)-labeled MIBG (I-131 MIBG) therapy for neuroendocrine tumors has been performed for more than a quarter-century. The indications of I-131 MIBG therapy include treatment-resistant neuroblastoma (NB), unresectable or metastatic pheochromocytoma (PC) and paraganglioma (PG), unresectable or metastatic carcinoid tumors, and unresectable or metastatic medullary thyroid cancer (MTC). I-131 MIBG therapy is one of the considerable effective treatments in patients with advanced NB, PC, and PG. On the other hand, I-131 MIBG therapy is an alternative method after more effective novel therapies are used such as radiolabeled somatostatin analogs and tyrosine kinase inhibitors in patients with advanced carcinoid tumors and MTC. No-carrier-aided (NCA) I-131 MIBG has more favorable potential compared to the conventional I-131 MIBG. Astatine-211-labeled meta-astatobenzylguanidine (At-211 MABG) has massive potential in patients with neuroendocrine tumors. Further studies about the therapeutic protocols of I-131 MIBG including NCA I-131 MIBG in the clinical setting and At-211 MABG in both the preclinical and clinical settings are needed.
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Affiliation(s)
- Daiki Kayano
- 1Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, 920-8641 Japan.,2Department of Nuclear Medicine, Fukushima Medical University Hospital, 1 Hikariga-oka, Fukushima, 960-1295 Japan
| | - Seigo Kinuya
- 1Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, 920-8641 Japan
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Ohshima Y, Sudo H, Watanabe S, Nagatsu K, Tsuji AB, Sakashita T, Ito YM, Yoshinaga K, Higashi T, Ishioka NS. Antitumor effects of radionuclide treatment using α-emitting meta- 211At-astato-benzylguanidine in a PC12 pheochromocytoma model. Eur J Nucl Med Mol Imaging 2018; 45:999-1010. [PMID: 29350258 PMCID: PMC5915519 DOI: 10.1007/s00259-017-3919-6] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 12/20/2017] [Indexed: 11/29/2022]
Abstract
PURPOSE Therapeutic options for patients with malignant pheochromocytoma are currently limited, and therefore new treatment approaches are being sought. Targeted radionuclide therapy provides tumor-specific systemic treatments. The β-emitting radiopharmaceutical meta-131I-iodo-benzylguanidine (131I-MIBG) provides limited survival benefits and has adverse effects. A new generation of radionuclides for therapy using α-particles including meta-211At-astato-benzylguanidine (211At-MABG) are expected to have strong therapeutic effects with minimal side effects. However, this possibility has not been evaluated in an animal model of pheochromocytoma. We aimed to evaluate the therapeutic effects of the α-emitter 211At-MABG in a pheochromocytoma model. METHODS We evaluated tumor volume-reducing effects of 211At-MABG using rat pheochromocytoma cell line PC12 tumor-bearing mice. PC12 tumor-bearing mice received intravenous injections of 211At-MABG (0.28, 0.56, 1.11, 1.85, 3.70 and 5.55 MBq; five mice per group). Tumor volumes were evaluated for 8 weeks after 211At-MABG administration. The control group of ten mice received phosphate-buffered saline. RESULTS The 211At-MABG-treated mice showed significantly lower relative tumor growth during the first 38 days than the control mice. The relative tumor volumes on day 21 were 509.2% ± 169.1% in the control mice and 9.6% ± 5.5% in the mice receiving 0.56 MBq (p < 0.01). In addition, the mice treated with 0.28, 0.56 and 1.11 MBq of 211At-MABG showed only a temporary weight reduction, with recovery in weight by day 10. CONCLUSION 211At-MABG exhibited a strong tumor volume-reducing effect in a mouse model of pheochromocytoma without weight reduction. Therefore, 211At-MABG might be an effective therapeutic agent for the treatment of malignant pheochromocytoma.
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Affiliation(s)
- Yasuhiro Ohshima
- Department of Radiation-Applied Biology Research, Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology, 1233 Watanukimachi, Takasaki-shi, Gunma, 370-1292, Japan
| | - Hitomi Sudo
- Department of Molecular Imaging and Theranostics, National Institutes for Quantum and Radiological Science and Technology, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan
| | - Shigeki Watanabe
- Department of Radiation-Applied Biology Research, Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology, 1233 Watanukimachi, Takasaki-shi, Gunma, 370-1292, Japan
| | - Kotaro Nagatsu
- Department of Radiopharmaceuticals Development, National Institutes for Quantum and Radiological Science and Technology, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan
| | - Atsushi B Tsuji
- Department of Molecular Imaging and Theranostics, National Institutes for Quantum and Radiological Science and Technology, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan
| | - Tetsuya Sakashita
- Department of Radiation-Applied Biology Research, Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology, 1233 Watanukimachi, Takasaki-shi, Gunma, 370-1292, Japan
| | - Yoichi M Ito
- Department of Biostatistics, Hokkaido University Graduate School of Medicine, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan
| | - Keiichiro Yoshinaga
- Diagnostic and Therapeutic Nuclear Medicine, National Institutes for Quantum and Radiological Science and Technology, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan.
| | - Tatsuya Higashi
- Department of Molecular Imaging and Theranostics, National Institutes for Quantum and Radiological Science and Technology, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan
| | - Noriko S Ishioka
- Department of Radiation-Applied Biology Research, Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology, 1233 Watanukimachi, Takasaki-shi, Gunma, 370-1292, Japan
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