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Chen Z, Wakabayashi H, Kuroda R, Mori H, Hiromasa T, Kayano D, Kinuya S. Radiation exposure lymphocyte damage assessed by γ-H2AX level using flow cytometry. Sci Rep 2024; 14:4339. [PMID: 38383619 PMCID: PMC10881581 DOI: 10.1038/s41598-024-54986-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 02/19/2024] [Indexed: 02/23/2024] Open
Abstract
DNA double-strand breaks (DSBs) are considered the most relevant lesions to the DNA damage of ionizing radiation (IR), and γ-H2AX foci in peripheral blood lymphocytes are regarded as an adequate marker for DSB quantitative studies. This study aimed to investigate IR-induced DNA damage in mice through γ-H2AX fluorescence analyses by flow cytometry (FCM). The levels of γ-H2AX in CD4/CD8/B220-positive lymphocytes were quantified by FCM through mean fluorescence intensity (MFI) values. Peripheral venous blood samples were collected for evaluation, and all the control groups were restrained from irradiation. For external irradiation experiments, the dose-dependency of MFI values and temporal alternations were assessed both in vitro and in vivo. External radiation exposure damage was positively correlated with the absorbed radiation dose, and the lymphocyte recovered from damage within 3 days. I-131 sodium iodide solution (74 MBq) was injected into the mice intraperitoneally for internal irradiation experiments. Gamma counting and γH2AX foci analyses were performed at 1 h and 24 h by the group. The blood-to-blood S values (Sblood←blood) were applied for the blood-absorbed dose estimation. Internal low-dose-irradiation-induced damage was proved to recover within 24 h. The FCM method was found to be an effective way of quantitatively assessing IR-induced DNA damage.
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Affiliation(s)
- Zhuoqing Chen
- Department of Nuclear Medicine, 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.
| | - Rie Kuroda
- Department of Pediatrics, 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
| | - Tomo Hiromasa
- 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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Zhang X, Wakabayashi H, Hiromasa T, Kayano D, Kinuya S. Recent Advances in Radiopharmaceutical Theranostics of Pheochromocytoma and Paraganglioma. Semin Nucl Med 2023; 53:503-516. [PMID: 36641337 DOI: 10.1053/j.semnuclmed.2022.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/23/2022] [Accepted: 12/29/2022] [Indexed: 01/15/2023]
Abstract
As a rare kind of non-epithelial neuroendocrine neoplasms, paragangliomas (PGLs) exhibit various clinical characteristics with excessive catecholamine secretion and have been a research focus in recent years. Although several modalities are available nowadays, radiopharmaceuticals play an integral role in the management of PGLs. Theranostics utilises radiopharmaceuticals for diagnostic and therapeutic intentions by aiming at a specific target in tumour and has been considered a possible means in diagnosis, staging, monitoring and treatment planning. Numerous radiopharmaceuticals have been developed over the past decades. 123/131-Metaiodobenzylguanidine (123/131I-MIBG), the theranostics pair target on norepinephrine transporter system, has remained a fantastic protocol for patients with PGLs because of disease control with limited toxicity. The high-specific-activity 131I-MIBG was authorised by the Food and Drug Administration as a systemic treatment method for metastatic PGLs in 2018. Afterward, peptide receptor radionuclide therapy, which uses radiolabelled somatostatin (SST) analogues, has been exploited as a superior substitute. 68Ga-somatostatin analogue (SSA) PET showed significant performance in diagnosing PGLs than MIBG scintigraphy, especially in patients with head and neck PGLs or SDHx mutation. 90Y/177Lu-DOTA-SSA is highly successful and has preserved favourable safety with mounting evidence regarding objective response, disease stabilisation, symptomatic and hormonal management and quality of life preservation. Besides the ordinary beta emitters, alpha-emitters such as 211At-MABG and 225Ac-DOTATATE have been investigated intensively in recent years. However, many studies are still in the pre-clinical stage, and more research is necessary. This review summarises the developments and recent advances in radiopharmaceutical theranostics of PGLs.
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Affiliation(s)
- Xue Zhang
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Ishikawa, Japan
| | - Hiroshi Wakabayashi
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Ishikawa, Japan.
| | - Tomo Hiromasa
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Ishikawa, Japan
| | - Daiki Kayano
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Ishikawa, Japan
| | - Seigo Kinuya
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Ishikawa, Japan
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Wakabayashi H, Mori H, Hiromasa T, Akatani N, Inaki A, Kozaka T, Kitamura Y, Ogawa K, Kinuya S, Taki J. 125I-labeled 2-[4-(2-iodophenyl)piperidino]cyclopentanol ( 125I-OI5V) imaging visualized augmented sigma-1 receptor expression according to the severity of myocardial ischemia. J Nucl Cardiol 2023; 30:653-661. [PMID: 35915325 DOI: 10.1007/s12350-022-03064-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 06/22/2022] [Indexed: 11/27/2022]
Abstract
BACKGROUND We aimed to explore how the severity of myocardial ischemia affects myocardial sigma-1 receptor (Sig-1R) expression using 125I-labeled 2-[4-(2-iodophenyl)piperidino]cyclopentanol (125I-OI5V) imaging. METHODS AND RESULTS The left coronary artery was occluded for 30, 20, and 10 minute, to vary the severity of myocardial ischemia, followed by reperfusion. Dual-tracer autoradiography of the left ventricular short-axis slices was performed 3 and 7 days after reperfusion. 125I-OI5V was injected 30 minute before sacrifice and the area at risk (AAR) was evaluated by 99mTc-MIBI. Intense 125I-OI5V uptake was observed in the AAR and was significantly increased with increasing ischemia duration. To evaluate salvaged and nonsalvaged areas (preserved and decreased perfusion areas), triple-tracer autoradiography was performed 3 days after reperfusion. After dual-tracer autoradiography, 201Tl was injected 20 minute post 125I-OI5V injection. On triple-tracer autoradiography, the AAR/normally perfused area 125I-OI5V uptake ratio was positively correlated with the nonsalvaged area/whole left ventricular (LV) area ratio (P < .05). The AAR/normally perfused area 125I-OI5V uptake ratio was negatively correlated with the 201Tl uptake ratio of the AAR to normally perfused areas (P < .05). The comparison of the immunostaining distribution of 125I-OI5V and the macrophage marker CD68 revealed that 125I-OI5V was present mainly in, and immediately adjacent to the macrophage infiltration area. CONCLUSIONS Significant 125I-OI5V uptake in the AAR depends on the duration of ischemia and reduced 201Tl uptake; furthermore, 125I-OI5V was found in and around the macrophage infiltrate area. These results indicate that iodine-labeled OI5V is a promising tool for visualizing Sig-1R expression according to the ischemic burden.
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Affiliation(s)
- Hiroshi Wakabayashi
- 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
| | - Tomo Hiromasa
- 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
| | - Anri Inaki
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Takashi Kozaka
- Division of Probe Chemistry for Disease Analysis, Research Center for Experimental Modeling of Human Disease, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Yoji Kitamura
- Division of Probe Chemistry for Disease Analysis, Research Center for Experimental Modeling of Human Disease, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Kazuma Ogawa
- Institute for Frontier Science Initiative, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa, 920-1192, Japan
| | - Seigo Kinuya
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Junichi Taki
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
- Kanazawa Advanced Medical Center, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-0934, Japan
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Akatani N, Wakabayashi H, Kayano D, Inaki A, Takata A, Hiromasa T, Yamase T, Kunita Y, Watanabe S, Mori H, Saito S, Nakajima K, Kinuya S. Long-term outcomes and prognostic factors of patients with lung metastases from differentiated thyroid cancer after radioiodine therapy in Japan. Endocr J 2023; 70:315-322. [PMID: 36567077 DOI: 10.1507/endocrj.ej22-0463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Long-term survival in patients with differentiated thyroid cancer (DTC) and lung metastasis remains unexplored in Japan. This study aimed to investigate the long-term survival and prognostic factors of radioiodine therapy (RIT) in a University Hospital setting. This retrospective study included 62 patients with lung metastases from DTC who received RIT between March 2005 and December 2016. According to the 131I whole-body scan and chest computed tomography results, lung metastases were classified as 131I-avid or non-131I-avid, and miliary, micronodular, or macronodular metastases. The 5- and 10-year overall survival (OS) rates from the initial RIT were calculated by the Kaplan-Meier method, and a proportional hazard fit analysis was performed to determine prognostic factors. With a median follow-up of 7.9 years, the 5- and 10-year OS rates from the initial RIT were 93% and 72%, respectively. Univariable and multivariable analyses of patient subgroups revealed that macronodular lung metastases (defined as nodules >1 cm), older age at initial RIT, and high thyroglobulin values (>400 ng/mL) at initial RIT predicted low OS. The 5- and 10-year OS rates of DTC patients with lung metastases were similar to those in previous Japanese reports, which included a smaller sample size compared with ours. Patients with ≤1 cm lung metastases, aged ≤55 years, and a thyroglobulin level of ≤400 ng/mL at the initial RIT had favorable outcomes.
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Affiliation(s)
- Norihito Akatani
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa 920-8641, Japan
| | - Hiroshi Wakabayashi
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa 920-8641, Japan
| | - Daiki Kayano
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa 920-8641, Japan
| | - Anri Inaki
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa 920-8641, Japan
| | - Aki Takata
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa 920-8641, Japan
| | - Tomo Hiromasa
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa 920-8641, Japan
| | - Takafumi Yamase
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa 920-8641, Japan
| | - Yuji Kunita
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa 920-8641, Japan
| | - Satoru Watanabe
- Department of Functional Imaging and Artificial Intelligence, Kanazawa University, Kanazawa 920-8641, Japan
| | - Hiroshi Mori
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa 920-8641, Japan
| | - Shintaro Saito
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa 920-8641, Japan
| | - Kenichi Nakajima
- Department of Functional Imaging and Artificial Intelligence, Kanazawa University, Kanazawa 920-8641, Japan
| | - Seigo Kinuya
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa 920-8641, Japan
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Shibutani T, Onoguchi M, Kanno T, Wakabayashi H, Hiromasa T, Kinuya S. Development of a novel small-animal myocardial phantom can evaluate the image quality of dual-isotope simultaneous acquisition (DISA). Ann Nucl Med 2022; 36:1031-1038. [PMID: 36227465 DOI: 10.1007/s12149-022-01791-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 09/27/2022] [Indexed: 11/01/2022]
Abstract
BACKGROUND Myocardial phantom studies are widely used as a tool to accurately assess the physical phenomenon of dual-isotope simultaneous acquisition (DISA) in the small-animal fields. However, the previous phantom did not reproduce the structures of rats or mice. The aim of this study was to develop a novel myocardial phantom simulating the structure of a small animal that can be evaluated using the image quality of DISA. METHODS A novel small-animal myocardial phantom that simulated a rat was constructed by the myocardium, liver, lung, spine, and torso. Normal and inferior wall defect myocardial phantoms were filled with 99mTc or 18F solution to simulate single-isotope acquisition (SIA) and DISA. Phantom and small-animal images with no scatter correction (nonSC) and scatter correction (SC) were created. RESULTS The 99mTc DISA with SC showed a low %CV compared to that with nonSC. Although the 99mTc DISA with nonSC had lower cavity contrast than that of 99mTc SIA with nonSC, the cavity contrast of SC had similar values between SIA and DISA. The minimum %uptake of 99mTc SIA with nonSC was a lower value compared to that of 99mTc DISA with nonSC. The 99mTc DISA was equivalent to the minimum %uptake of 99mTc SIA by SC. CONCLUSION We have developed a novel myocardial phantom for the rat model to evaluate the image quality for reproducing the physical phenomenon associated with radiation attenuation and scattering. Furthermore, we could demonstrate the usefulness of the novel small-animal myocardial phantom by image quality evaluation of DISA with 99mTc and 18F compared to SIA.
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Affiliation(s)
- Takayuki Shibutani
- Department of Quantum Medical Technology, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80, Kodatsuno, Kanazawa, Japan.,Department of Quantum Medical Technology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Masahisa Onoguchi
- Department of Quantum Medical Technology, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80, Kodatsuno, Kanazawa, Japan. .,Department of Quantum Medical Technology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan.
| | - Takayuki Kanno
- Department of Quantum Medical Technology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan.,Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan.,Department of Radiological Technology, Nagoya University Hospital, Nagoya, Japan
| | - Hiroshi Wakabayashi
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Japan
| | - Tomo Hiromasa
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Japan
| | - Seigo Kinuya
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, 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] [What about the content of this article? (0)] [Affiliation(s)] [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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Wakabayashi H, Taki J, Mori H, Hiromasa T, Akatani N, Inaki A, Kozaka T, Shiba K, Ogawa K, Kinuya S. Visualization of Dynamic Expression of Myocardial Sigma-1 Receptor After Myocardial Ischemia and Reperfusion Using Radioiodine-Labeled 2-[4-(2-iodophenyl)piperidino]cyclopentanol (OI5V) Imaging. Circ J 2021; 85:2102-2108. [PMID: 34176868 DOI: 10.1253/circj.cj-21-0320] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND This study chronologically evaluated the expression of the intensity and distribution of the sigma-1 receptor (σ1R) demonstrated by radiolabeled 2-[4-(2-iodophenyl)piperidino]cyclopentanol (OI5V) in a rat model of myocardial ischemia and reperfusion.Methods and Results:The left coronary artery was occluded for 30 min, followed by reperfusion. Dual-tracer autoradiography with 125I-OI5V and 99 mTc-MIBI was performed to assess the spatiotemporal changes in 125I-OI5V uptake (n=5-6). Significant and peaked 125I-OI5V uptake in the ischemic area was observed at 3 days after reperfusion, and the 125I-OI5V uptake ratio of ischemic area to normally perfused left ventricular area decreased gradually from 3 to 28 days (mean value±SD; 0.90±0.12 at 1 day, 1.89±0.19 at 3 days, 1.52±0.17 at 7 days, 1.34±0.13 at 14 days, and 1.16±0.14 at 28 days, respectively). Triple-tracer autoradiography with 125I-OI5V, 99 mTc-MIBI, and 201TlCl was performed to evaluate 125I-OI5V uptake in the ischemic area in relation to the residual perfusion at 7 days (n=4). The 125I-OI5V uptake ratio of the non-salvaged area was higher compared to that of the salvaged area in the ischemic area. 123I-OI5V and 99 mTc-MIBI SPECT/CT was performed 3 days after reperfusion (n=3), and the in vivo images showed clear uptake of 123I-OI5V in the perfusion defect area. CONCLUSIONS The present study confirmed the spatiotemporal expression pattern of σ1R expression. Non-invasive σ1R imaging with 123I or 125I-OI5V was feasible to monitor the expression of σ1R after myocardial ischemia and reperfusion.
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Affiliation(s)
| | - Junichi Taki
- Department of Nuclear Medicine, Kanazawa University Hospital
| | - Hiroshi Mori
- Department of Nuclear Medicine, Kanazawa University Hospital
| | - Tomo Hiromasa
- Department of Nuclear Medicine, Kanazawa University Hospital
| | | | - Anri Inaki
- Department of Nuclear Medicine, Kanazawa University Hospital
| | - Takashi Kozaka
- Division of Tracer Kinetics, Advanced Science Research Center, Kanazawa University
| | - Kazuhiro Shiba
- Division of Tracer Kinetics, Advanced Science Research Center, Kanazawa University
| | - Kazuma Ogawa
- Institute for Frontier Science Initiative, Kanazawa University
| | - Seigo Kinuya
- Department of Nuclear Medicine, Kanazawa University Hospital
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Takuma K, Hirama H, Koji M, Satoru M, Hiroshi S, Toshihiro S, Ryuji M, Shinichi S, Yasuyuki S, Hiroshi F, Yukio N, Hiromasa T, Isao H, Osamu O, Katsuyoshi H, Fumimasa F, Akira Y, Yoichiro T, Yoshiyuki K, Mikio S. %p2PSA and phi predict the pathological reclassification of first-year protocol biopsy during Active surveillance for early prostate cancer patients: From the PRIAS-JAPAN study. Eur Urol 2021. [DOI: 10.1016/s0302-2838(21)01412-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Mori H, Taki J, Wakabayashi H, Hiromasa T, Inaki A, Ogawa K, Shiba K, Kinuya S. Colchicine treatment early after infarction attenuates myocardial inflammatory response demonstrated by 14C-methionine imaging and subsequent ventricular remodeling by quantitative gated SPECT. Ann Nucl Med 2021; 35:253-259. [PMID: 33389666 DOI: 10.1007/s12149-020-01559-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Accepted: 11/26/2020] [Indexed: 10/22/2022]
Abstract
OBJECTIVE Colchicine has been used as an anti-inflammatory agent and may be cardioprotective after acute myocardial infarction (AMI). We investigated how colchicine administration after AMI affects the myocardial inflammatory response using 14C-methionine and subsequent ventricular remodeling using single-photon emission computed tomography (SPECT) in a rat model of AMI. METHODS The left coronary artery (LCA) was occluded for 30 min followed by reperfusion. 14C-methionine was injected at 20 min before sacrifice. The LCA was re-occluded at 1 min before sacrifice and 99mTc-methoxyisobutylisonitrile (99mTc-MIBI) was injected. Colchicine was administered intraperitoneally from day 1 to the day before 14C-methionine injection. Dual-tracer autoradiography of the left ventricular short-axis slices was performed. The methionine uptake ratio in an ischemic area was calculated. 99mTc-MIBI gated SPECT assessed end-diastolic volume (EDV), end-systolic volume (ESV) and left ventricular ejection fraction (LVEF). On Cluster of Differentiation 68 with 4',6-diamidino-2-phenylindole (CD68/DAPI) staining the positive myocardial cell percentage in an ischemic area was calculated. RESULTS In control rats, 14C-methionine uptake ratios on day 3 and 7 were 1.87 ± 0.15 and 1.39 ± 0.12, respectively. With colchicine, the uptake was reduced on days 3 (1.56 ± 0.26, p = 0.042) and 7 (1.23 ± 0.10, p = 0.030). Colchicine treated rats showed smaller EDV, ESV, and higher LVEF compared with control rats. At 8 weeks, those in control rats were 864 ± 115 μL, 620 ± 100 μL, 28.4 ± 2.5%, and in colchicine rats 665 ± 75 μL, 390 ± 97 μL, 42.2 ± 8.5% (p = 0.012, 0.0061, 0.0083), respectively. In control rats, CD68/DAPI positive myocardial cell percentages on days 3 and 7 were 38.4 ± 1.9% and 24.0 ± 2.4%, respectively. With colchicine, the percentages were reduced significantly on both days 3 (31.5 ± 2.0%, p < 0.0001) and 7 (12.0 ± 1.6%, p < 0.0001) as compared with the control. CONCLUSIONS Short-term colchicine treatment after AMI attenuated the post-AMI inflammatory response and subsequent ventricular remodeling and dysfunction. 14C-methionine imaging and gated 99mTc-MIBI SPECT would be feasible to monitor the effectiveness of anti-inflammatory therapy and left ventricular function.
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Affiliation(s)
- Hiroshi Mori
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan.
| | - Junichi Taki
- Department of Nuclear Medicine, 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
| | - Tomo Hiromasa
- 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
| | - Kazuma Ogawa
- Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, Japan
| | - Kazuhiro Shiba
- Division of Tracer Kinetics, Advanced Science Research Center, Kanazawa University, Kanazawa, Japan
| | - Seigo Kinuya
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
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Hiromasa T, Kuramitsu S, Yamaji K, Domei T, Hyodo M, Soga Y, Shirai S, Ando K. Impact of SYNTAX score 2 on 7-year clinical outcomes in patients treated with cobalt-chromium everolimus-eluting stent. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Impact of SYNTAX score II (SSII) on long-term clinical outcomes after cobalt-chromium everolimus-eluting stent (CoCr-EES) implantation remains unclear.
Methods
Between February 2010 and May 2011, 1064 consecutive patients with 1440 lesions were treated only with CoCr-EES implantation. Of these, the SSII was calculated in 1013 patients with 1345 lesions. Patients were divided into the tertile group: Tertiles for SSII (low SSII [12–28.9], n=334; intermediate SSII [29–39.1], n=339; and high SSII [39.2–80.8], n=340). We assessed the cumulative 7-year incidences of major adverse cardiac events (MACE), defined as a composite of cardiac death, myocardial infarction, definite stent thrombosis, and clinically driven target lesion revascularization (CDTLR) based on SSII groupings.
Results
Cumulative 7-year incidence of MACE was significantly higher in the high SSII group than in the other groups (34.1% vs. 18.6% vs. 17.2%, p<0.001). The cumulative incidence of cardiac death, myocardial infarction and stent thrombosis were significantly higher in the high SSII group than in the other groups (22.1% vs. 2.0% vs. 5.3%, p<0.001; 6.6% vs. 4.9% vs. 1.7%, p=0.01; 2.9% vs. 1.7% vs. 0.3%, p=0.03, respectively). The cumulative incidence of CDTLR was similar between the groups (15.2% vs. 12.8% vs. 15.7%, p=0.57). High SSII group (hazard ratio [HR] 2.18 [vs. low SS], 95% confidence intervals [CI]: 1.56–3.06, p<0.001) and diabetes mellitus (HR 1.37, 95% CI: 1.04–1.81, p=0.03) were predictors of 7-year MACE.
Conclusions
SSII has significantly impact on 7 years clinical outcomes after CoCr-EES implantation.
Cumulative incidence of MACE
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- T Hiromasa
- Kokura Memorial Hospital, Kitakyushu, Japan
| | | | - K Yamaji
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - T Domei
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - M Hyodo
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - Y Soga
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - S Shirai
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - K Ando
- Kokura Memorial Hospital, Kitakyushu, Japan
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Shiga H, Wakabayashi H, Washiyama K, Noguchi T, Hiromasa T, Miyazono S, Kumai M, Ogawa K, Taki J, Kinuya S, Miwa T. Thallium-201 Imaging in Intact Olfactory Sensory Neurons with Reduced Pre-Synaptic Inhibition In Vivo. Mol Neurobiol 2020; 57:4989-4999. [PMID: 32820461 PMCID: PMC7541386 DOI: 10.1007/s12035-020-02078-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 08/14/2020] [Indexed: 11/30/2022]
Abstract
In this study, we determined whether the 201Tl (thallium-201)-based olfactory imaging is affected if olfactory sensory neurons received reduced pre-synaptic inhibition signals from dopaminergic interneurons in the olfactory bulb in vivo. The thallium-201 migration rate to the olfactory bulb and the number of action potentials of olfactory sensory neurons were assessed 3 h following left side nasal administration of rotenone, a mitochondrial respiratory chain complex I inhibitor that decreases the number of dopaminergic interneurons without damaging the olfactory sensory neurons in the olfactory bulb, in mice (6–7 animals per group). The migration rate of thallium-201 to the olfactory bulb was significantly increased following intranasal administration of thallium-201 and rotenone (10 μg rotenone, p = 0.0012; 20 μg rotenone, p = 0.0012), compared with that in control mice. The number of action potentials was significantly reduced in the olfactory sensory neurons in the rotenone treated side of 20 μg rotenone-treated mice, compared with that in control mice (p = 0.0029). The migration rate of thallium-201 to the olfactory bulb assessed with SPECT-CT was significantly increased in rats 24 h after the left intranasal administration of thallium-201 and 100 μg rotenone, compared with that in control rats (p = 0.008, 5 rats per group). Our results suggest that thallium-201 migration to the olfactory bulb is increased in intact olfactory sensory neurons with reduced pre-synaptic inhibition from dopaminergic interneurons in olfactory bulb glomeruli.
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Affiliation(s)
- Hideaki Shiga
- Department of Otorhinolaryngology, Kanazawa Medical University, Uchinadamachi, Kahokugun, Ishikawa, 920-0293, Japan.
| | - Hiroshi Wakabayashi
- Department of Nuclear Medicine, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa, 920-8640, Japan
| | - Kohshin Washiyama
- Advanced Clinical Research Center, Fukushima Global Medical Science Center, Fukushima Medical University, Fukushima, 960-1295, Japan
| | - Tomohiro Noguchi
- Department of Sensory Physiology, Asahikawa Medical University, Asahikawa, 078-8510, Japan
| | - Tomo Hiromasa
- Department of Nuclear Medicine, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa, 920-8640, Japan
| | - Sadaharu Miyazono
- Department of Sensory Physiology, Asahikawa Medical University, Asahikawa, 078-8510, Japan
| | - Masami Kumai
- Department of Otorhinolaryngology, Kanazawa Medical University, Uchinadamachi, Kahokugun, Ishikawa, 920-0293, Japan
| | - Kazuma Ogawa
- Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, Ishikawa, 920-1192, Japan
| | - Junichi Taki
- Department of Nuclear Medicine, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa, 920-8640, Japan
| | - Seigo Kinuya
- Department of Nuclear Medicine, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa, 920-8640, Japan
| | - Takaki Miwa
- Department of Otorhinolaryngology, Kanazawa Medical University, Uchinadamachi, Kahokugun, Ishikawa, 920-0293, Japan
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Wakabayashi H, Konishi T, Yoneyama H, Inaki A, Hiromasa T, Yamase T, Akatani N, Watanabe S, Mori H, Kayano D, Kinuya S. Utility of 123I-MIBG Standardized Uptake Value in Patients with Refractory Pheochromocytoma and Paraganglioma. Asia Ocean J Nucl Med Biol 2019; 7:115-120. [PMID: 31380450 PMCID: PMC6661310 DOI: 10.22038/aojnmb.2019.35953.1245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVES Single-photon emission computed tomography (SPECT) using metaiodobenzylguanidine (MIBG) is an important diagnostic tool for the treatment of refractory pheochromocytoma and paraganglioma (PPGL). Owing to the difficulty of SPECT quantification, the tumour-to-background ratio (TBR) is used to assess disease activity. However, the utility of TBR is limited owing to the background setting. A quantification technique of SPECT/computed tomography (CT) would facilitate image interpretation. This study aimed to assess the relationship between 123I-MIBG maximum standardized uptake value (SUVmax) and TBR and levels of urinary catecholamines and metabolites in patients with refractory PPGL. METHODS This study included 15 patients with refractory PPGL who underwent 131I-MIBG therapy. Overall, 27 123I-MIBG SPECT/CT images were acquired before and after the therapy. Lesions observed on whole-body images were analysed; the maximum number of lesions per scan was 10. 123I-MIBG SUVmax was semi-automatically calculated using Q. Metrix package (GE Healthcare). TBR was manually calculated according to the following formula: (max count in lesion - max count in background)/max count in background. Background was set in the contralateral area. When a background region of interest could not be set in the area, it was set in the thigh area. Urine was sampled for 24 h to measure catecholamine and metabolite levels. Increases of ≥3-fold were considered abnormal. TBR, 123I-MIBG SUVmax and urinary catecholamine and metabolite levels were compared using linear regression analysis. RESULTS All patients had MIBG-avid lesions, as seen on 123I-MIBG SPECT/CT. A significant relationship between 123I-MIBG SUVmax and TBR was observed (correlation coefficient [r] =0.84, P < 0.0001). In 27 SPECT/CT examinations, normetanephrine (NMN) level was abnormally increased in 51% (14/27), but other catecholamine and other metabolites were abnormally increased in < 26% (7/27). 123I-MIBG SUVmax strongly correlated with NMN (r=0.76, P < 0.01) and log NMN (r=0.74, P < 0.01). CONCLUSION 123I-MIBG SUVmax demonstrated similar trends as TBR and reflected urinary NMN in patients with refractory PPGL. Semi-automatic quantification of SPECT/CT could be a useful tool for the evaluation of disease activity.
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Affiliation(s)
- Hiroshi Wakabayashi
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Japan,Corresponding author: Hiroshi Wakabayashi, Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Japan. Tel: +81762652333; Fax: +81762344257;
| | - Tahahiro Konishi
- Department of Radiological Technology, Kanazawa University Hospital, Kanazawa, Japan
| | - Hiroto Yoneyama
- Department of Radiological Technology, Kanazawa University Hospital, Kanazawa, Japan
| | - Anri Inaki
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Japan
| | - Tomo Hiromasa
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Japan
| | - Takafumi Yamase
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Japan
| | - Norihito Akatani
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Japan
| | - Satoru Watanabe
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Japan
| | - Hiroshi Mori
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Japan
| | - Daiki Kayano
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Japan
| | - Seigo Kinuya
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Japan
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13
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Wakabayashi H, Taki J, Inaki A, Hiromasa T, Yamase T, Akatani N, Okuda K, Shibutani T, Shiba K, Kinuya S. Prognostic Value of Early Evaluation of Left Ventricular Dyssynchrony After Myocardial Infarction. Mol Imaging Biol 2018; 21:654-659. [DOI: 10.1007/s11307-018-1279-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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14
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Hiromasa T, Kuramitsu S, Dohmei T, Yamaji K, Hyodoh M, Soga Y, Shirai S, Ando K. P2641Impact of SYNTAX score on 5 years clinical outcomes in patients treated with cobalt-chromium everolimus-eluting stent for unprotected left main disease. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- T Hiromasa
- Kokura Memorial Hospital, Kitakyushu, Japan
| | | | - T Dohmei
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - K Yamaji
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - M Hyodoh
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - Y Soga
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - S Shirai
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - K Ando
- Kokura Memorial Hospital, Kitakyushu, Japan
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15
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Hiromasa T, Kuramitsu S, Dohmei T, Yamaji K, Hyodoh M, Soga Y, Shirai S, Ando K. P6379Impact of Body Mass Index on 3 years clinical outcomes in patients treated with platinum chromium-everolimus eluting stent implantation. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- T Hiromasa
- Kokura Memorial Hospital, Kitakyushu, Japan
| | | | - T Dohmei
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - K Yamaji
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - M Hyodoh
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - Y Soga
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - S Shirai
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - K Ando
- Kokura Memorial Hospital, Kitakyushu, Japan
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16
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Hiromasa T, Kuramitsu S, Dohmei T, Yamaji K, Hyodoh M, Soga Y, Shirai S, Ando K. P1666Impact of SYNTAX score and Clinical SYNTAX score on 5 years clinical outcomes in patients treated with cobalt-chromium everolimus-eluting stent. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- T Hiromasa
- Kokura Memorial Hospital, Kitakyushu, Japan
| | | | - T Dohmei
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - K Yamaji
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - M Hyodoh
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - Y Soga
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - S Shirai
- Kokura Memorial Hospital, Kitakyushu, Japan
| | - K Ando
- Kokura Memorial Hospital, Kitakyushu, Japan
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17
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Wakabayashi H, Taki J, Inaki A, Hiromasa T, Okuda K, Shibutani T, Shiba K, Kinuya S. Quantification of Myocardial Perfusion Defect Size in Rats: Comparison between Quantitative Perfusion SPECT and Autoradiography. Mol Imaging Biol 2018; 20:544-550. [PMID: 29340889 DOI: 10.1007/s11307-018-1159-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 01/02/2018] [Indexed: 12/20/2022]
Abstract
PURPOSE Ultra-high resolution single-photon emission computed tomography (SPECT) system, using multiple pinhole collimators, has been applied to the imaging of small rodents. We aimed to compare the myocardial infarction (MI) area on quantitative perfusion single-photon emission computed tomography (QPS; Cedars-Sinai Medical Center, USA) with that on high-resolution autoradiography in rat model to determine the accuracy of perfusion defect measurement by QPS. PROCEDURES After thoracotomy, rats (n = 9) had their left coronary arteries occluded and reperfused before injection with 185 MBq [99mTc] methoxyisobutylisonitrile ([99mTc]MIBI) for SPECT and autoradiography. Healthy rats (n = 28) were similarly scanned to create a normal database on which to base QPS. The MI area on SPECT images was analysed automatically by QPS software. For the autoradiography images, regions of interest for MI were set at 1 mm intervals. RESULTS In normal rats, [99mTc]MIBI accumulated throughout the left ventricles, and a polar map of ventricular perfusion showed the lowest and highest uptakes in the inferior (68 % ± 4 %) and anterior (92 % ± 5 %) walls, respectively. In the rat MI model, the percentage of polar map with reduced [99mTc]MIBI uptake correlated strongly with the percentage of left ventricle with MI on autoradiography (r2 = 0.90). CONCLUSIONS QPS can quantitatively evaluate MI severity on myocardial perfusion images in rats, with comparable results to autoradiography. This widely available software could promote the development of new techniques for analysing cardiac images in small animals.
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Affiliation(s)
- Hiroshi Wakabayashi
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan.
| | - Junichi Taki
- 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
| | - Tomo Hiromasa
- Department of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Koichi Okuda
- Department of Physics, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Kahoku, Ishikawa, 920-0293, Japan
| | - Takayuki Shibutani
- Department of Quantum Medical Technology, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, Ishikawa, 920-0942, Japan
| | - Kazuhiro Shiba
- Division of Tracer Kinetics, Advanced Science Research Center, Kanazawa University, 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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Hiromasa T, Kuramitsu S, Jinnouchi H, Domei T, Hyodo M, Soga Y, Shirai S, Ando K. P1385Impact of SYNTAX score on 5 years clinical outcomes in patients treated with cobalt-chromium everolimus-eluting stent. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Fujioka S, Kuramitsu S, Hiromasa T, Jinnouchi H, Morinaga T, Domei T, Hyodo M, Soga Y, Shirai S, Ando K. P3315Long-term efficacy and safety of biodegradable polymer biolimus-eluting vs. permanent polymer everolimus-eluting stents in diabetic Patients: 4-year clinical outcomes. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hesselbrock M, Ward R, Lallemand F, Campanella S, Noel X, Verbank P, De Witte P, Walter H, Patek K, Maesato H, Hiromasa T, Itoh M, Kimura M, Matsushita S, Higuchi S. S30 * GENDER DIFFERENCES IN ALCOHOL DEPENDENCE II. Alcohol Alcohol 2013. [DOI: 10.1093/alcalc/agt108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Higashi Y, Hiromasa T, Tanae A, Miki T, Nakura J, Kondo T, Ohura T, Ogawa E, Nakayama K, Fujii-Kuriyama Y. Effects of individual mutations in the P-450(C21) pseudogene on the P-450(C21) activity and their distribution in the patient genomes of congenital steroid 21-hydroxylase deficiency. J Biochem 1991; 109:638-44. [PMID: 1869518 DOI: 10.1093/oxfordjournals.jbchem.a123433] [Citation(s) in RCA: 127] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Recent observations have suggested that the pathological mutations in human P-450(C21) deficiency are generated through gene conversion-like events between the functional gene [P-450(21)B] and the pseudogene [P-450(C21)A]. To address this point more extensively, we investigated the effects of the base changes in the A pseudogene on the P-450(21) activity by using the COS cell expression system. In addition to the defective mutations found previously in the pseudogene, four single base changes with amino acid substitutions of Pro(30), Ile(172), Val(282), or Arg(356) were further identified as causing complete [Arg(356)] or partial [Pro(30), Ile(172), and Val(282)] inactivation of P-450(C21). Blot hybridization analysis of patient DNAs using oligonucleotide probes specific for these mutations revealed that the splicing mutation in the 2nd intron was distributed most frequently in both simple-virilizing and salt-wasting forms. The mutation Ile(172) seemed to be frequent in patients with the less severe simple-virilizing form, whereas the mutation Arg(356), together with other most serious mutations reported previously, was preferentially associated with salt-wasting, the most severe form of the disease. In combination with the present results of the effects of various mutations on the P-50(C21) activity, a survey of the distribution of the various mutations in the patient genomes so far reported suggests that the heterogeneous clinical symptoms of this genetic disease are somehow related to the degree of attenuation of the activities of the mutated gene products.
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Affiliation(s)
- Y Higashi
- Department of Biochemistry, Cancer Institute, Tokyo
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Sogawa K, Handa H, Fujisawa-Sehara A, Hiromasa T, Yamane M, Fujii-Kuriyama Y. Repression of cytochrome P-450c gene expression by cotransfection with adenovirus E1a DNA. Eur J Biochem 1989; 181:539-44. [PMID: 2525087 DOI: 10.1111/j.1432-1033.1989.tb14757.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Gene expression of rat cytochrome P-450c (P-450c) depends upon inducible enhancers scattered in the 5'-upstream region of the gene. We show that expression of the P-450c gene is repressed by contransfection with adenovirus E1a DNA, regardless of the presence or absence of inducers, in a transient expression system of HeLa cells. Since cotransfection of either 13S or 12S E1a cDNA was effective in the repression, the region necessary for repression could be separated from that of transactivation of other adenovirus early genes. Moreover, we investigated the regions responsible for the inhibitory activity using in-frame deletion mutants lacking internal or external portions of the E1a proteins. The sequence responsible for the repression was located in the amino-terminal half of the E1a proteins. The inducible expression of the chimeric plasmid containing a 24-base-pair enhancer sequence of the P-450c gene placed in a heterologous promoter of SV40 was repressed by cotransfection with E1a DNA, suggesting strongly that the inhibitory effect of the E1a proteins upon P-450c gene expression was caused by blocking the enhancer activity.
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Affiliation(s)
- K Sogawa
- Cancer Institute, Japanese Foundation for Cancer Research, Tokyo
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Higashi Y, Tanae A, Inoue H, Hiromasa T, Fujii-Kuriyama Y. Aberrant splicing and missense mutations cause steroid 21-hydroxylase [P-450(C21)] deficiency in humans: possible gene conversion products. Proc Natl Acad Sci U S A 1988; 85:7486-90. [PMID: 2845408 PMCID: PMC282216 DOI: 10.1073/pnas.85.20.7486] [Citation(s) in RCA: 161] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Four steroid 21-hydroxylase B [P-450(C21)B] genes (designated P.7, P.10-1, P.10-2, and P.3) from three P-450(C21)-deficient patients were isolated to analyze their structures and functions. Several base changes were observed in the sequences of the four P-450(C21)B genes as compared to that of the functional B gene. Many of these base changes were identical to those of the P-450(C21)A pseudogene. The three DNAs (P.10-1, P.10-2, and P.3) produced no P-450(C21) activity in a functional assay for P-450(C21) by the COS cell expression system, while the P.7 DNA expressed the activity. The P.10-1 and P.10-2 DNAs were shown to have a point mutation in the second intron, causing aberrant splicing. The P.3 DNA carried three clustered missense mutations in the sixth exon, which impaired P-450(C21) activity. All these critical mutations could be seen in the corresponding site of the P-450(C21)A pseudogene. These data strongly suggest the involvement of gene conversion in this genetic disease.
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Affiliation(s)
- Y Higashi
- Department of Biochemistry, Cancer Institute, Tokyo, Japan
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