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Aoyama S, Yasuda S, Li H, Watanabe D, Umezawa Y, Okada K, Nogami A, Miura O, Kawamata N. A novel chimeric antigen receptor (CAR) system using an exogenous protease, in which activation of T cells is controlled by expression patterns of cell‑surface proteins on target cells. Int J Mol Med 2022; 49:42. [PMID: 35119085 PMCID: PMC8846940 DOI: 10.3892/ijmm.2022.5097] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 01/17/2022] [Indexed: 12/02/2022] Open
Abstract
Anti-CD19 chimeric antigen receptor (CAR)-T cell therapy against refractory B-cell malignancies shows excellent therapeutic effects. However, there are some obstacles to be overcome in this treatment. Since current CAR-T cells target a single cell-surface protein on tumor cells, the CAR-T cells also attack normal cells expressing the protein. This is one of the major adverse effects of this therapy. To improve target-cell-specificity of this therapy, we established a novel CAR system, in which T-cell activation was controlled by expression patterns of proteins on target cells. Our novel CAR-T cells had two distinct CARs consisting of a 'Signal-CAR', recognizing a protein on tumor cells, and a 'Scissors-CAR', recognizing another protein on normal cells. The signal-CAR had a peptide sequence which was cleaved by the Scissors-CAR, and functional domains for cellular activation. The Scissors-CAR had a protease domain that cleaved its recognition peptide sequence in the Signal-CAR. When tumor cells expressed only the protein recognized by the Signal-CAR, the tumor cells were attacked. By contrast, normal cells expressing both the proteins induced inactivation of the Signal-CAR through cleavage of the recognition site when getting in contact with the CAR-T cells. To establish this system, we invented a Scissors-CAR that was dominantly localized on cell membranes and was activated only when the CAR-T cells were in contact with the normal cells. Using a T-cell line, Jurkat, and two proteins, CD19 and HER2, as target proteins, we showed that the anti-CD19-Signal-CAR was cleaved by the anti-HER2-Scissors-CAR when the CAR-T cells were co-cultivated with cells expressing both the proteins, CD19 and HER2. Furthermore, we demonstrated that primary CAR-T cells expressing both the CARs showed attenuated cytotoxicity againsT cells with both the target proteins. Our novel system would improve safety of the CAR-T cell therapy, leading to expansion of treatable diseases by this immunotherapy.
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Affiliation(s)
- Satoru Aoyama
- Department of Immunotherapy for Hematopoietic Disorders, Tokyo Medical and Dental University (TMDU), Tokyo 113‑8510, Japan
| | - Shunichiro Yasuda
- Department of Immunotherapy for Hematopoietic Disorders, Tokyo Medical and Dental University (TMDU), Tokyo 113‑8510, Japan
| | - Huixin Li
- Department of Immunotherapy for Hematopoietic Disorders, Tokyo Medical and Dental University (TMDU), Tokyo 113‑8510, Japan
| | - Daisuke Watanabe
- Department of Immunotherapy for Hematopoietic Disorders, Tokyo Medical and Dental University (TMDU), Tokyo 113‑8510, Japan
| | - Yoshihiro Umezawa
- Department of Hematology, Tokyo Medical and Dental University (TMDU), Tokyo 113‑8510, Japan
| | - Keigo Okada
- Department of Hematology, Tokyo Medical and Dental University (TMDU), Tokyo 113‑8510, Japan
| | | | - Osamu Miura
- Department of Hematology, Tokyo Medical and Dental University (TMDU), Tokyo 113‑8510, Japan
| | - Norihiko Kawamata
- Department of Immunotherapy for Hematopoietic Disorders, Tokyo Medical and Dental University (TMDU), Tokyo 113‑8510, Japan
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Yasuda M, Tachi T, Osawa T, Watanabe H, Inoue S, Makino T, Nagaya K, Morita M, Tanaka K, Aoyama S, Kasahara S, Teramachi H, Mizui T. Risk factors for thrombocytopenia and analysis of time to platelet transfusion after azacitidine treatment. Pharmazie 2021; 76:444-449. [PMID: 34481536 DOI: 10.1691/ph.2021.1566] [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] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The use of azacitidine (AZA) has been known to lead to a high incidence of hematotoxic adverse events. The aims of this study were to identify the risk factors for thrombocytopenia after the administration of AZA and to analyze time to the initial platelet transfusion. Sixty-two patients with myelodysplastic syndrome (MDS), who were treated with AZA in Gifu Municipal Hospital between March 2012 and June 2020, were included in this study. The risk factors for thrombocytopenia were identified using univariate analysis of patient characteristics, disease type, and laboratory values immediately before the start of treatment. Variables with p<0.2 identified in the univariate analysis were used as independent variables in the multivariate analysis. This analysis identified "creatinine clearance (CCr) <60 mL/min" as a significant factor (odds ratio, 4.790; 95% confidence interval [CI], 1.380-16.70; p=0.014). Subsequently, time in days to the initial platelet transfusion after the initial administration of AZA was analyzed using the log-rank test. The overall median time in days to platelet transfusion was 370 days. The log-rank test was used to determine the influence of patient characteristics, disease type, and laboratory values immediately before the start of treatment. The subsequent Cox proportional hazard regression analysis using variables with p<0.2 as independent variables identified "hemoglobin (Hb) <8.0 g/dL" as a significant factor (hazard ratio, 2.143; 95% CI, 1.001-4.573; p=0.048). The results of this study led to the following clinical implications: first, patients with CCr of <60 mL/min at the start of treatment should be treated with caution due to the risk of thrombocytopenia. Second, patients with Hb of <8.0 g/dL at the start of treatment may require platelet transfusion in the early stage of treatment.
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Affiliation(s)
- M Yasuda
- Department of Pharmacy, Gifu Municipal Hospital, Japan; Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University, Japan;,
| | - T Tachi
- Department of Pharmacy, Gifu Municipal Hospital, Japan; Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University, Japan
| | - T Osawa
- Department of Pharmacy, Gifu Municipal Hospital, Japan
| | - H Watanabe
- Department of Pharmacy, Gifu Municipal Hospital, Japan
| | - S Inoue
- Department of Pharmacy, Gifu Municipal Hospital, Japan
| | - T Makino
- Department of Pharmacy, Gifu Municipal Hospital, Japan
| | - K Nagaya
- Department of Pharmacy, Gifu Municipal Hospital, Japan
| | - M Morita
- Department of Pharmacy, Gifu Municipal Hospital, Japan
| | - K Tanaka
- Department of Pharmacy, Gifu Municipal Hospital, Japan
| | - S Aoyama
- Department of Pharmacy, Gifu Municipal Hospital, Japan
| | - S Kasahara
- Department of Hematology, Gifu Municipal Hospital, Gifu, Japan
| | - H Teramachi
- Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University, Japan
| | - T Mizui
- Department of Pharmacy, Gifu Municipal Hospital, Japan
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Yasuda S, Aoyama S, Yoshimoto R, Li H, Watanabe D, Akiyama H, Yamamoto K, Fujiwara T, Najima Y, Doki N, Sakaida E, Edahiro Y, Imai M, Araki M, Komatsu N, Miura O, Kawamata N. MPL overexpression induces a high level of mutant-CALR/MPL complex: a novel mechanism of ruxolitinib resistance in myeloproliferative neoplasms with CALR mutations. Int J Hematol 2021; 114:424-440. [PMID: 34165774 DOI: 10.1007/s12185-021-03180-0] [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: 03/22/2021] [Revised: 06/17/2021] [Accepted: 06/17/2021] [Indexed: 11/26/2022]
Abstract
Ruxolitinib (RUX), a JAK1/2-inhibitor, is effective for myeloproliferative neoplasm (MPN) with both JAK2V617 F and calreticulin (CALR) mutations. However, many MPN patients develop resistance to RUX. Although mechanisms of RUX-resistance in cells with JAK2V617 F have already been characterized, those in cells with CALR mutations remain to be elucidated. In this study, we established RUX-resistant human cell lines with CALR mutations and characterized mechanisms of RUX-resistance. Here, we found that RUX-resistant cells had high levels of MPL transcripts, overexpression of both MPL and JAK2, and increased phosphorylation of JAK2 and STAT5. We also found that mature MPL proteins were more stable in RUX-resistant cells. Knockdown of MPL in RUX-resistant cells by shRNAs decreased JAK/STAT signaling. Immunoprecipitation assays showed that binding of mutant CALR to MPL was increased in RUX-resistant cells. Reduction of mutated CALR decreased proliferation of the resistant cells. When resistant cells were cultured in the absence of RUX, the RUX-resistance was reversed, with reduction of the mutant-CALR/MPL complex. In conclusion, MPL overexpression induces higher levels of a mutant-CALR/MPL complex, which may cause RUX-resistance in cells with CALR mutations. This mechanism may be a new therapeutic target to overcome RUX-resistance.
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Affiliation(s)
- Shunichiro Yasuda
- Department of Immunotherapy for Hematopoietic Disorders, Tokyo Medical and Dental University, TMDU, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
- Department of Hematology, TMDU, Tokyo, Japan
| | - Satoru Aoyama
- Department of Immunotherapy for Hematopoietic Disorders, Tokyo Medical and Dental University, TMDU, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
- Department of Hematology, TMDU, Tokyo, Japan
| | | | - Huixin Li
- Department of Immunotherapy for Hematopoietic Disorders, Tokyo Medical and Dental University, TMDU, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Daisuke Watanabe
- Department of Immunotherapy for Hematopoietic Disorders, Tokyo Medical and Dental University, TMDU, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
- Department of Hematology, TMDU, Tokyo, Japan
| | | | | | - Takeo Fujiwara
- Department of Global Health Promotion, TMDU, Tokyo, Japan
| | - Yuho Najima
- Hematology Division, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, Japan
| | - Noriko Doki
- Hematology Division, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, Japan
| | - Emiko Sakaida
- Department of Hematology, Chiba University, Chiba, Japan
| | - Yoko Edahiro
- Department of Hematology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Misa Imai
- Department of Hematology, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Leading center for the development and Research of Cancer Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Marito Araki
- Department of Transfusion Medicine and Stem Cell Regulation, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Norio Komatsu
- Department of Hematology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Osamu Miura
- Department of Hematology, TMDU, Tokyo, Japan
| | - Norihiko Kawamata
- Department of Immunotherapy for Hematopoietic Disorders, Tokyo Medical and Dental University, TMDU, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan.
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Matsuyama T, Tachi T, Katsuno H, Sugioka M, Aoyama S, Osawa T, Koyama A, Murayama A, Noguchi Y, Yasuda M, Mizui T, Goto C, Teramachi H. Effects of polypharmacy on the prevalence of adverse drug events resulting in outpatient visits and hospitalization. Pharmazie 2021; 76:279-286. [PMID: 34078523 DOI: 10.1691/ph.2021.1427] [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] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A high proportion of hospitalizations is attributable to the prevalence of adverse drug events. This retrospective study included outpatients and inpatients to determine the prevalence of adverse drug events and if polypharmacy increases it. The prevalence, classification, and causality of adverse drug events were assessed based on medical records, laboratory values, and other data. Multivariate analysis (multiple logistic regression analysis) was performed with the presence or absence of adverse drug events at the time of the visit as the dependent variable and items for which the P-value was <0.25 in the univariate analysis as independent variables. The prevalence of adverse drug events was 13.0%, 10.9%, and 16.0% among all patients, the outpatient group, and the inpatient group, respectively. Multivariate analysis showed that polypharmacy (≥5 drugs) significantly increased the risk of adverse drug events in all patients. The prevalence of adverse drug events significantly increased with each additional drug used. We expect that minimizing the number of medications through moderation of the number of prescription drugs and elimination of polypharmacy will reduce the number of outpatient visits and hospitalizations due to adverse drug events.
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Affiliation(s)
- T Matsuyama
- Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University, Gifu, Japan
| | - T Tachi
- Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University, Gifu, Japan; Department of Pharmacy, Gifu Municipal Hospital, Gifu, Japan;,
| | - H Katsuno
- Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University, Gifu, Japan
| | - M Sugioka
- Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University, Gifu, Japan
| | - S Aoyama
- Department of Pharmacy, Gifu Municipal Hospital, Gifu, Japan
| | - T Osawa
- Department of Pharmacy, Gifu Municipal Hospital, Gifu, Japan
| | - A Koyama
- Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University, Gifu, Japan
| | - A Murayama
- Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University, Gifu, Japan
| | - Y Noguchi
- Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University, Gifu, Japan
| | - M Yasuda
- Department of Pharmacy, Gifu Municipal Hospital, Gifu, Japan
| | - T Mizui
- Department of Pharmacy, Gifu Municipal Hospital, Gifu, Japan
| | - C Goto
- Department of Pharmacy, Gifu Municipal Hospital, Gifu, Japan
| | - H Teramachi
- Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University, Gifu, Japan; Laboratory of Community Health Pharmacy, Gifu Pharmaceutical University, Gifu, Japan;,
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Aoyama S, Yasuda S, Watanabe D, Akiyama H, Okada K, Umezawa Y, Nogami A, Miura O, Kawamata N. Abstract 2167: A protease-mediated regulatory chimeric antigen receptor (CAR): “Scissors” CAR improves target-specificity through regulation of T-cell activity. Cancer Res 2020. [DOI: 10.1158/1538-7445.am2020-2167] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
[Introduction] CAR-T cell therapy is an attractive methodology in the field of cancer immunotherapy. The anti-CD19 CAR-T cell therapy shows excellent therapeutic effects against refractory B-cell malignancies. However, the CAR-T cells attack not only target-tumor-cells, but also normal tissues expressing the target molecule, for example, normal B-cells with CD19. For the CAR-T cell therapy, such “on-target / off-tumor” effect is one of major obstacles to be overcome. Here, we show the protease-mediated regulatory CAR-T cell system, which improved the target-specificity by recognizing two distinct antigens. We designed two types of CAR: "effector CAR" and "scissors CAR". The “effector CAR” is constituted of a single chain Fv fragment (scFv) targeting an antigen (protein X) on tumor cells, Human Immunodeficiency Virus protease (HIVPR) recognition site, and a functional domain of CD3-ζ. The “scissors CAR” is constituted of a scFv targeting another antigen (protein Y) and HIVPR. The “scissors CAR” induces cleavage of the “effector CAR” leading to inactivation when the CAR-T cells contact with cells expressing both proteins X and Y.
[Material and Methods] For proof of principle, we first constructed the anti-CD19 “mCherry CAR” harboring mCherry fluorescence protein in the cytoplasmic region under the HIVPR recognition site. Also, we constructed the anti-HER2 “scissors CAR”. To analyze the target-cell dependent cleavage of “mCherry CAR”, 293T cells expressing the CARs were co-cultured with target-cells, including Raji (CD19+, HER2-) and engineered SK-BR-3 (CD19+, HER2+). Locations of mCherry were analyzed under the microscopy and by Western blotting. Next, to assess T-cell activation, we established Jurkat cells expressing both the anti-CD19 “effector CAR” and the anti-HER2 “scissors CAR”. These cells were co-cultured with the target-cells described above. T-cell activation was analyzed by both flowcytometric analysis and measurement of IL-2 mRNA expression.
[Results] Transduced anti-CD19 “mCherry CAR” was detected as a membranous protein in 293T cell. Co-cultivation of 293T cell expressing both the anti-CD19 “mCherry CAR” and the anti-HER2 “scissors CAR” with Raji (CD19+, HER2-) did not change the localization of mCherry. However, engineered SK-BR-3 (CD19+, HER2+) induced cleavage of the recognition site and translocation of the mCherry from the membrane to cytoplasm. Furthermore, the anti-HER2 “scissors CAR” attenuated T-cell activation driven by the anti-CD19 “effector CAR” when Jurkat cells expressing both the CARs contacted with the target-cells expressing both CD19 and HER2.
[Discussion] This novel protease-mediated CAR-T system recognized expression pattern of target molecules and regulated T-cell activity. Our CAR-T system would attenuate the adverse effects and contribute to expansion in application of CAR-T cell therapy.
Citation Format: Satoru Aoyama, Shunichiro Yasuda, Daisuke Watanabe, Hiroki Akiyama, Keigo Okada, Yoshihiro Umezawa, Ayako Nogami, Osamu Miura, Norihiko Kawamata. A protease-mediated regulatory chimeric antigen receptor (CAR): “Scissors” CAR improves target-specificity through regulation of T-cell activity [abstract]. In: Proceedings of the Annual Meeting of the American Association for Cancer Research 2020; 2020 Apr 27-28 and Jun 22-24. Philadelphia (PA): AACR; Cancer Res 2020;80(16 Suppl):Abstract nr 2167.
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Affiliation(s)
- Satoru Aoyama
- Tokyo Medical & Dental University (TMDU), Tokyo, Japan
| | | | | | | | - Keigo Okada
- Tokyo Medical & Dental University (TMDU), Tokyo, Japan
| | | | - Ayako Nogami
- Tokyo Medical & Dental University (TMDU), Tokyo, Japan
| | - Osamu Miura
- Tokyo Medical & Dental University (TMDU), Tokyo, Japan
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Mori T, Aoyama S, Seike Y. Electrical Conduction and Luminescence for Inverted-Type Organic Light-Emitting Diodes with Polyethyleneimine. J PHOTOPOLYM SCI TEC 2019. [DOI: 10.2494/photopolymer.32.571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Tatsuo Mori
- Department of Electrical and Electronic Engineering, Graduate School of Engineering, Aichi Institute of Technology
| | - Satoru Aoyama
- Department of Electrical and Electronic Engineering, Graduate School of Engineering, Aichi Institute of Technology
| | - Yoshiyuki Seike
- Department of Electrical and Electronic Engineering, Graduate School of Engineering, Aichi Institute of Technology
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Esaki H, Tachi T, Goto C, Noguchi Y, Tanaka K, Aoyama S, Yasuda M, Mizui T, Yamamura M, Teramachi H. Relationship Between Initial Renal Function and the Inhibitory Effect of Dipeptidyl Peptidase-4 Inhibitor Treatment on Renal Function Decline. Pharmazie 2019; 74:374-382. [PMID: 31138377 DOI: 10.1691/ph.2019.8973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We retrospectively investigated the renal function index of patients with type 2 diabetes mellitus (T2DM) to examine the influence of dipeptidyl peptidase-4 (DPP-4) inhibitors on renal function between patients up to early nephropathy and after overt nephropathy. Patients with T2DM (>18 years old) who had been prescribed hypoglycemic agents for ≥3 months at Gifu Municipal Hospital between March 2010 and April 2014 were included in the study. Renal function was evaluated as the estimated glomerular filtration rate (eGFR) decline from baseline at 12 months. Patients in the DPP-4 inhibitor-treated and untreated groups with an eGFR ≥60 (358 [58.2 %] and 257 [41.8 %], respectively) and eGFR <60 (115 [60.2 %] and 76 [39.8 %], respectively) were subjected to multiple logistic regression analysis. Among patients with an eGFR ≥60, no significant differences were observed in eGFR decline rates over time. However, among patients with an eGFR <60, significant decreases were observed in eGFR decline rates >10 % (6 months; odds ratio, 0.476; P = 0.043, 12 months; odds ratio, 0.413; P = 0.010). Similar results were obtained for an eGFR decline rate >20 % (12 months; odds ratio, 0.369; P = 0.049). DPP-4 inhibitors are renoprotective in patients with T2DM and an eGFR <60.
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Aoyama S, Mori M, Uchida T, Masuda H, Ohtani R, Sugimoto K, Liu J, Kuwabara S. Analysis of Anti-JCV antibody in Japanese patients with multiple sclerosis. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.682] [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: 10/18/2022]
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Aoyama S, Miyazawa Y, Ogura K, Sugawara A, Hirata M. Improved Performance of Oversized Backward Wave Oscillator Driven by Weakly Relativistic Electron Beam. Fusion Science and Technology 2017. [DOI: 10.13182/fst07-a1390] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- S. Aoyama
- Graduate School of Science and Technology, Niigata University, Niigata, 950-2181, Japan
| | - Y. Miyazawa
- Graduate School of Science and Technology, Niigata University, Niigata, 950-2181, Japan
| | - K. Ogura
- Graduate School of Science and Technology, Niigata University, Niigata, 950-2181, Japan
| | - A. Sugawara
- Graduate School of Science and Technology, Niigata University, Niigata, 950-2181, Japan
| | - M. Hirata
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
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Wakae K, Aoyama S, Wang Z, Kitamura K, Liu G, Monjurul AM, Koura M, Imayasu M, Sakamoto N, Nakamura M, Kyo S, Kondo S, Fujiwara H, Yoshizaki T, Kukimoto I, Yamaguchi K, Shigenobu S, Nishiyama T, Muramatsu M. Detection of hypermutated human papillomavirus type 16 genome by Next-Generation Sequencing. Virology 2015; 485:460-6. [PMID: 26356796 DOI: 10.1016/j.virol.2015.08.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [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: 04/15/2015] [Revised: 08/16/2015] [Accepted: 08/17/2015] [Indexed: 11/28/2022]
Abstract
Human papillomavirus type 16 (HPV16) is a major cause of cervical cancer. We previously demonstrated that C-to-T and G-to-A hypermutations accumulated in the HPV16 genome by APOBEC3 expression in vitro. To investigate in vivo characteristics of hypermutation, differential DNA denaturation-PCR (3D-PCR) was performed using three clinical specimens obtained from HPV16-positive cervical dysplasia, and detected hypermutation from two out of three specimens. One sample accumulating hypermutations in both E2 and the long control region (LCR) was further subjected to Next-Generation Sequencing, revealing that hypermutations spread across the LCR and all early genes. Notably, hypermutation was more frequently observed in the LCR, which contains a viral replication origin and the early promoter. APOBEC3 expressed abundantly in an HPV16-positive cervix, suggesting that single-stranded DNA exposed during viral replication and transcription may be efficient targets for deamination. The results further strengthen a role of APOBEC3 in introducing HPV16 hypermutation in vivo.
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Affiliation(s)
- Kousho Wakae
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan
| | - Satoru Aoyama
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan; Tokyo Medical and Dental University Hospital Faculty of Medicine, Tokyo 113-8510, Japan
| | - Zhe Wang
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan; Division of Medical Oncology, Affiliated Zhongshan Hospital of Dalian University, 116001, China
| | - Kouichi Kitamura
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan
| | - Guangyan Liu
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan
| | - Ahasan Md Monjurul
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan
| | - Miki Koura
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan
| | - Mieko Imayasu
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan
| | - Naoya Sakamoto
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan
| | - Mitsuhiro Nakamura
- Department of Obstetrics and Gynecology, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan
| | - Satoru Kyo
- Department of Obstetrics and Gynecology, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan; Department of Obstetrics and Gynecology, Shimane University Faculty of Medicine, Izumo, Shimane 693-8501, Japan
| | - Satoru Kondo
- Division of Otorhinolaryngology and Head and Neck Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan
| | - Hiroshi Fujiwara
- Department of Obstetrics and Gynecology, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan
| | - Tomokazu Yoshizaki
- Division of Otorhinolaryngology and Head and Neck Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan
| | - Iwao Kukimoto
- Pathogen Genomics Center, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashi-murayama, Tokyo 208-0011, Japan
| | - Katsushi Yamaguchi
- Functional Genomic Facility, National Institute of Basic Biology, Nishigonaka 38, Myodaiji, Okazaki, Aichi 444-8585, Japan
| | - Shuji Shigenobu
- Functional Genomic Facility, National Institute of Basic Biology, Nishigonaka 38, Myodaiji, Okazaki, Aichi 444-8585, Japan
| | - Tomoaki Nishiyama
- Advanced Science Research Center, Kanazawa University, Kanazawa, Ishikawa 920-8640, Japan.
| | - Masamichi Muramatsu
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa 920-8640, Japan.
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Kukimoto I, Mori S, Aoyama S, Wakae K, Muramatsu M, Kondo K. Hypermutation in the E2 gene of human papillomavirus type 16 in cervical intraepithelial neoplasia. J Med Virol 2015; 87:1754-60. [PMID: 25914233 DOI: 10.1002/jmv.24215] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [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] [Accepted: 03/19/2015] [Indexed: 01/21/2023]
Abstract
Persistent infection with oncogenic human papillomavirus (HPV) causes cervical cancer. However, viral genetic changes during cervical carcinogenesis are not fully understood. Recent studies have revealed the presence of adenine/thymine-clustered hypermutation in the long control region of the HPV16 genome in cervical intraepithelial neoplasia (CIN) lesions, and suggested that apolipoprotein B mRNA editing enzyme, catalytic polypeptide-like (APOBEC) proteins, which play a key role in innate immunity against retroviral infection, potentially introduce such hypermutation. This study reports for the first time the detection of adenine/thymine-clustered hypermutation in the E2 gene of HPV16 isolated from clinical specimens with low- and high-grade CIN lesions (CIN1/3). Differential DNA denaturation PCR, which utilizes lower denaturation temperatures to selectively amplify adenine/thymine-rich DNA, identified clusters of adenine/thymine mutations in the E2 gene in 4 of 11 CIN1 (36.4%), and 6 of 27 CIN3 (22.2%) samples. Interestingly, the number of mutations per sample was higher in CIN3 than in CIN1. Although the relevance of E2 hypermutation in cervical carcinogenesis remains unclear, the observed hypermutation patterns strongly imply involvement of APOBEC3 proteins in editing the HPV16 genome during natural viral infection.
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Affiliation(s)
- Iwao Kukimoto
- Pathogen Genomics Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Seiichiro Mori
- Pathogen Genomics Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Satoru Aoyama
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan
| | - Kousho Wakae
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan
| | - Masamichi Muramatsu
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan
| | - Kazunari Kondo
- Department of Obstetrics and Gynecology, NTT Medical Center Tokyo, Tokyo, Japan
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Wang Z, Wakae K, Kitamura K, Aoyama S, Liu G, Koura M, Monjurul AM, Kukimoto I, Muramatsu M. APOBEC3 deaminases induce hypermutation in human papillomavirus 16 DNA upon beta interferon stimulation. J Virol 2014; 88:1308-17. [PMID: 24227842 PMCID: PMC3911654 DOI: 10.1128/jvi.03091-13] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [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: 11/04/2013] [Accepted: 11/05/2013] [Indexed: 12/22/2022] Open
Abstract
Apolipoprotein B mRNA-editing catalytic polypeptide 3 (APOBEC3) proteins are interferon (IFN)-inducible antiviral factors that counteract various viruses such as hepatitis B virus (HBV) and human immunodeficiency virus type 1 (HIV-1) by inducing cytidine (C)-to-uracil (U) mutations in viral DNA and inhibiting reverse transcription. However, whether APOBEC3 proteins (A3s) can hypermutate human papillomavirus (HPV) viral DNA and exhibit antiviral activity in human keratinocyte remains unknown. Here we examined the involvement of A3s in the HPV life cycle using cervical keratinocyte W12 cells, which are derived from low-grade lesions and retain episomal HPV16 genomes in their nuclei. We focused on the viral E2 gene as a potential target for A3-mediated hypermutation because this gene is frequently found as a boundary sequence in integrated viral DNA. Treatment of W12 cells with beta interferon (IFN-β) increased expression levels of A3s such as A3A, A3F, and A3G and induced C-to-U conversions in the E2 gene in a manner depending on inhibition of uracil DNA glycosylase. Exogenous expression of A3A and A3G also induced E2 hypermutation in W12 cells. IFN-β-induced hypermutation was blocked by transfection of small interfering RNAs against A3G (and modestly by those against A3A). However, the HPV16 episome level was not affected by overexpression of A3A and A3G in W12 cells. This study demonstrates that endogenous A3s upregulated by IFN-β induce E2 hypermutation of HPV16 in cervical keratinocytes, and a pathogenic consequence of E2 hypermutation is discussed.
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Affiliation(s)
- Zhe Wang
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Kousho Wakae
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Kouichi Kitamura
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Satoru Aoyama
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Guangyan Liu
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Miki Koura
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Ahasan M. Monjurul
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Iwao Kukimoto
- Pathogen Genomics Center, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Masamichi Muramatsu
- Department of Molecular Genetics, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
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13
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Tachi T, Teramachi H, Asano S, Tanaka K, Fukuta M, Osawa T, Aoyama S, Yasuda M, Mizui T, Goto C, Tsuchiya T. Impact of levofloxacin dose adjustments by dispensing pharmacists on adverse reactions and costs in the treatment of elderly patients. Pharmazie 2013; 68:977-982. [PMID: 24400446] [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] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Ensuring an appropriate dosage of renally eliminated drugs for patients with renal insufficiency is important for preventing adverse drug reactions. We investigated the effectiveness of interventions by pharmacists in a hospital pharmaceutical department. The comparative study was performed at Gifu Municipal Hospital in Japan from March to August 2011, and included an intervention (142 patients) and a control group (98 patients). Upon receiving a prescription of levofloxacin for patients aged > or = 75 years, pharmacists evaluated the patients' kidney function and adjusted the appropriate dosage at the time of dispensation. In the intervention and control groups, levofloxacin-induced adverse reactions developed in 6 of 142 (4.2%) and 13 of 98 (13.3%) patients, respectively (p < 0.05). The cost of reducing levofloxacin per patient was yen 191.1 and yen 0 in the intervention and control groups, respectively. The cost per patient for adverse reaction treatments and examinations was yen 15.5 and yen 290.0 in the intervention and control groups, respectively. The intergroup difference in the total cost per patient was yen 465.6. Dose adjustment of levofloxacin at the time of dispensation by the pharmacist for patients aged > or = 75 years resulted in a decrease in the incidence of adverse reactions and cost. These findings can be applied not only to hospitals, but also to community pharmacies, because the intervention, which is a manual system, is simply performed when pharmacists are dispensing drugs.
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Affiliation(s)
- T Tachi
- Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University, Gifu, Japan.
| | - H Teramachi
- Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University, Gifu, Japan
| | - S Asano
- Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University, Gifu, Japan
| | - K Tanaka
- Department of Pharmacy, Gifu Municipal Hospital, Gifu, Japan
| | - M Fukuta
- Department of Pharmacy, Gifu Municipal Hospital, Gifu, Japan
| | - T Osawa
- Department of Pharmacy, Gifu Municipal Hospital, Gifu, Japan
| | - S Aoyama
- Department of Pharmacy, Gifu Municipal Hospital, Gifu, Japan
| | - M Yasuda
- Department of Pharmacy, Gifu Municipal Hospital, Gifu, Japan
| | - T Mizui
- Department of Pharmacy, Gifu Municipal Hospital, Gifu, Japan
| | - C Goto
- Department of Pharmacy, Gifu Municipal Hospital, Gifu, Japan
| | - T Tsuchiya
- Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University, Gifu, Japan
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14
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Kudoh Y, Aoyama S, Torii T, Chen Q, Nagahara D, Sakata H, Nozawa A. Hemodynamic stabilizing effects of L-carnitine in chronic hemodialysis patients. Cardiorenal Med 2013; 3:200-207. [PMID: 24454315 DOI: 10.1159/000355016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Accepted: 08/12/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The effects of L-carnitine on the hemodynamic state of chronic hemodialysis patients have been debated. In order to clarify the effect of administered L-carnitine on cardiac function and hypotensive episodes during the hemodialysis procedure, a randomized double-blind placebo-controlled study was performed for 3 months. METHODS AND RESULTS TWENTY STABLE OUTPATIENTS UNDERGOING HEMODIALYSIS TREATMENT WERE DIVIDED INTO TWO GROUPS: controls (placebo) and treated patients (L-carnitine 900 mg p.o. daily). After 3 months, cardiac function was reevaluated by echocardiography, and hypotensive episodes during hemodialysis were assessed. Free and acyl carnitine levels increased significantly from 22.3 ± 7.1 to 140.3 ± 57.5 μmol/l and from 15.8 ± 2.8 to 94.8 ± 50.4 μmol/l, respectively, in the treated group. The ejection fraction significantly increased from 61.8 ± 16.0 to 64.4 ± 13.8% (p < 0.05) in the treated group. However, there was no difference in other echocardiographic parameters between the two groups. Hypotensive episodes significantly decreased from 4.0 ± 1.7 to 1.3 ± 0.9 times per month (p < 0.05), although patients' body weight did not change significantly. CONCLUSIONS Beneficial effects of L-carnitine on the hemodynamic state of chronic hemodialysis patients were observed. L-Carnitine supplementation might be considered especially for chronic hemodialysis patients with unstable hemodynamic conditions.
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15
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Mizui T, Teramachi H, Tachi T, Tamura K, Shiga H, Komada N, Umeda M, Koda A, Aoyama S, Goto C, Tsuchiya T. Risk factors for Clostridium difficile-associated diarrhea and the effectiveness of prophylactic probiotic therapy. Pharmazie 2013; 68:706-710. [PMID: 24020129] [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] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Measures for prevention of Clostridium difficile-associated diarrhea, a common nosocomial infection, in hospital settings are urgently needed. This study was conducted to identify the risk factors contributing to C. difficile-associated diarrhea and to evaluate the clinical benefit of probiotics in its prevention. The study included 2716 patients at least 20 years old who received an injected antibiotic at any time between February 2010 and February 2011; a total of 2687 patients (98.9%) were assigned to the non-C. difficile-associated diarrhea group, and 29 patients (1.1%) were assigned to the C. difficile-associated diarrhea group. Univariate analysis revealed a significant difference between the two groups for the following factors: antibiotic therapy for > or = 8 days; enteral nutrition; intravenous hyperalimentation; fasting; proton pump inhibitor use; H2 blocker use; and serum albumin < or = 2.9g/dL (p<0.05). Multivariate logistic regression analysis revealed a significant difference between the two groups for several factors. Antibiotic therapy for > or = 8 days, intravenous hyperalimentation, proton pump inhibitor use, and H2 blocker use were therefore shown to be risk factors for C. difficile-associated diarrhea. Prophylactic probiotic therapy was not shown to suppress the occurrence of C. difficile-associated diarrhea.
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Affiliation(s)
- T Mizui
- Department of Pharmacy, Gifu Municipal Hospital, Gifu, Japan
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16
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Kanari Y, Sato Y, Aoyama S, Muta T. Thioredoxin-interacting protein gene expression via MondoA is rapidly and transiently suppressed during inflammatory responses. PLoS One 2013; 8:e59026. [PMID: 23520550 PMCID: PMC3592832 DOI: 10.1371/journal.pone.0059026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Accepted: 02/11/2013] [Indexed: 12/18/2022] Open
Abstract
Whereas accumulating evidence indicates that a number of inflammatory genes are induced by activation of nuclear factor-κB and other transcription factors, less is known about genes that are suppressed by proinflammatory stimuli. Here we show that expression of thioredoxin-interacting protein (Txnip) is dramatically suppressed both in mRNA and protein levels upon stimulation with lipopolysaccharide in mouse and human macrophages. In addition to lipopolysaccharide, a Toll-like receptor 4 ligand, stimulation with other Toll-like receptor ligands such as CpG DNA also suppressed Txnip expression. Not only the Toll-like receptor ligands, but also other proinflammatory stimulators, such as interleukin-1β and tumor necrosis factor-α elicited the similar response in fibroblasts. Suppression of Txnip by lipopolysaccharide is accompanied by a decrease of the glucose sensing transcription factor MondoA in the nuclei and dissociation of the MondoA:Mlx complex that bound to the carbohydrate-response elements in the Txnip promoter in unstimulated cells. Lipopolysaccharide-mediated decrease of nuclear MondoA was inhibited in the presence of 2-deoxyglucose. Furthermore, blockage of glyceraldehyde-3-phosphate dehydrogenase by iodoacetate alleviated the suppression of Txnip mRNA by lipopolysaccharide, suggesting the involvement of glucose-metabolites in the regulation. Since Txnip is implicated in the regulation of glucose metabolism, this observation links between inflammatory responses and metabolic regulation.
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Affiliation(s)
- Yasuyoshi Kanari
- Laboratory of Cell Recognition and Response, Graduate School of Life Sciences, Tohoku University, Sendai, Miyagi, Japan
- Global Center of Excellence Program, Center for Ecosystem Management Adapting to Global Change, Sendai, Miyagi, Japan
| | - Yuki Sato
- Department of Biology, Faculty of Science, Tohoku University, Sendai, Miyagi, Japan
| | - Satoru Aoyama
- Department of Biology, Faculty of Science, Tohoku University, Sendai, Miyagi, Japan
| | - Tatsushi Muta
- Laboratory of Cell Recognition and Response, Graduate School of Life Sciences, Tohoku University, Sendai, Miyagi, Japan
- Global Center of Excellence Program, Center for Ecosystem Management Adapting to Global Change, Sendai, Miyagi, Japan
- Department of Biology, Faculty of Science, Tohoku University, Sendai, Miyagi, Japan
- * E-mail:
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17
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Sasaki T, Aoyama S, Yoshida H, Kulyako Y, Samsonov M, Kobayashi T, Takagi I, Miyasoedov B, Moriyama H. Apparent formation constants of Pu(IV) and Th(IV) with humic acids determined by solvent extraction method. RADIOCHIM ACTA 2012. [DOI: 10.1524/ract.2012.1944] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
Apparent formation constants of Pu(IV) and Th(IV) with two kinds of humic acids were determined in 0.1 M NaClO4 at 25 ºC using a solvent extraction method with thenoyltrifluoroacetone in xylene. The acid dissociation constants of humic acids were also measured by potentiometric titration and used as the degree of dissociation for calculating the formation constants. The effect of solution conditions, such as the pH, the initial metal and humic acid concentrations, and the ionic strength, on the formation constants was examined. The obtained data were compared with the ones in the literature.
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Affiliation(s)
| | - S. Aoyama
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - H. Yoshida
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - Y. Kulyako
- V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry, RAS (GEOKHI), Moscow, Russische Föderation
| | - M. Samsonov
- V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry, RAS (GEOKHI), Moscow, Russische Föderation
| | - Taishi Kobayashi
- Kyoto University, Department of Nuclear Engineering, Kyoto, Japan
| | - I. Takagi
- Kyoto University Yoshida, Department of Nuclear Engineering, Kyoto, Japan
| | - B. Miyasoedov
- V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry, RAS (GEOKHI), Moscow, Russische Föderation
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18
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Arai K, Aoyama S, Suzuki Y, Descouvemont P, Baye D. Tensor force manifestations in ab initio study of the 2H(d,γ)4He, 2H(d,p)3H, and 2H(d,n)3He reactions. Phys Rev Lett 2011; 107:132502. [PMID: 22026847 DOI: 10.1103/physrevlett.107.132502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Indexed: 05/31/2023]
Abstract
The (2)H(d,p)(3)H, (2)H(d,n)(3)He, and (2)H(d,γ)(4)He reactions are studied at low energies in a multichannel ab initio model that takes into account the distortions of the nuclei. The internal wave functions of these nuclei are given by the stochastic variational method with the AV8' realistic interaction and a phenomenological three-body force included to reproduce the two-body thresholds. The obtained astrophysical S factors are all in very good agreement with the experiment. The most important channels for both transfer and radiative capture are identified by comparing to calculations with an effective central force. They are all found to dominate thanks to the tensor force.
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Affiliation(s)
- K Arai
- Division of General Education, Nagaoka National College of Technology, Niigata, Japan.
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19
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Ito T, Akahira E, Aoyama S, Inoue M, Morita M, Miyakawa H. Multi-cell Ca2+ imaging in CA1 area of rat hippocampal slices: effects of extracellular DC electric field. Neurosci Res 2010. [DOI: 10.1016/j.neures.2010.07.1968] [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: 10/19/2022]
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20
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Yachida S, Aoyama S, Sawaguchi K, Takahashi N, Iritani Y, Hayashi Y. Relationship between several criteria of challenge-immunity and humoral immunity in chickens vaccinated with avian infectious bronchitis vaccines. Avian Pathol 2008; 14:199-211. [PMID: 18766913 DOI: 10.1080/03079458508436222] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Several methods were compared for assessing the immunity of chickens vaccinated with avian-infectious bronchitis virus (IBV) by observing tracheal ciliary activity, respiratory signs and virus recovery from several organs following challenge with virus which had not been passaged in embryos. All chickens vaccinated twice with live Kita-1 strain were protected according to all criteria. However, in chickens vaccinated with killed IBV and with H-120 strain 13 weeks earlier, respiratory signs were present and tracheal virus was isolated from the birds with ciliostasis regardless of their having significant levels of haemagglutination inhibiting (HI) antibody. This indicated that only observing the ciliary activity is insufficient for assessing complete immunity and no direct correlation exists between the serum HI titre and the presence of ciliostasis, respiratory signs and virus recovery from tracheas, excluding those from kidneys and genitalia. Regardless of the serum HI titres at challenge, full protection based on the six criteria was found in some birds at 1 week and in most chickens from 2 to 6 weeks after intraocular vaccination with live Kita-1 strain.
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Affiliation(s)
- S Yachida
- Aburahi Laboratories, Shionogi Research Laboratories, Shionogi and Co., Ltd., Koka-cho, Shiga, Japan
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21
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Saito Y, Aoyama S, Kondo T, Fukumoto R, Konishi N, Nakamura K, Kobayashi M, Toshima T. Frontal cerebral blood flow change associated with infant-directed speech. Arch Dis Child Fetal Neonatal Ed 2007; 92:F113-6. [PMID: 16905571 PMCID: PMC2675452 DOI: 10.1136/adc.2006.097949] [Citation(s) in RCA: 65] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To examine the auditory perception of maternal utterances by neonates using near-infrared spectroscopy (NIRS). METHODS Twenty full-term, healthy neonates were included in this study. The neonates were tested in their cribs while they slept in a silent room. First, two probe holders were placed on the left and right sides of the forehead over the eyebrows using double-sided adhesive tape. The neonates were then exposed to auditory stimuli in the form of infant-directed speech (IDS) or adult-directed speech (ADS), sampled from each of the mothers, through an external auditory speaker. RESULTS A 2 (stimulus: IDS and ADS) x 2 (recording site: channel 1 (right side) and channel 2 (left side)) analysis of variance for these relative oxygenated haemoglobin values showed that IDS (Mean = 0.25) increased brain function significantly (F = 3.51) more than ADS (Mean = -0.26). CONCLUSIONS IDS significantly increased brain function compared with ADS. These results suggest that the emotional tone of maternal utterances could have a role in activating the brains of neonates to attend to the utterances, even while sleeping.
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Affiliation(s)
- Y Saito
- Department of Psychology, Hiroshima University, Kagamiyama 1-1-1, Higashi-Hiroshima, Hiroshima 739-8524, Japan.
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Aoyama S, Iwaki H, Amagasa T, Kino K, Okada N, Kishimoto S. Pigmented villonodular synovitis of the temporomandibular joint: differential diagnosis and case report. Br J Oral Maxillofac Surg 2004; 42:51-4. [PMID: 14706302 DOI: 10.1016/s0266-4356(03)00193-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Pigmented villonodular synovitis of the temporomandibular joint (TMJ) is rare. We present a patient in whom the lesion had invaded the infratemporal fossa and destroyed the mandibular condyle.
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Affiliation(s)
- S Aoyama
- Maxillofacial Surgery, Maxillofacial Reconstruction and Function, Division of Maxillofacial and Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.
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Aoyama S, Shibata K, Tokunaga S, Takase M, Matsui K, Nakamura M. Expression of Dmrt1 protein in developing and in sex-reversed gonads of amphibians. Cytogenet Genome Res 2003; 101:295-301. [PMID: 14684998 DOI: 10.1159/000074352] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.2] [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: 05/19/2003] [Accepted: 06/18/2003] [Indexed: 11/19/2022] Open
Abstract
Many genes are known to be involved in gonadal differentiation in vertebrates. Dmrt1, a gene that encodes a transcription factor with a DM-domain, is considered to be one of the essential genes controlling testicular differentiation in mammals, birds, reptiles, amphibians and fish. However, it still remains unknown which testicular cells of animals other than mice and chicks express Dmrt1 protein. For an explanation of its role(s) in testicular differentiation in vertebrates, the expression of the Dmrt1 protein needs to be studied. For this purpose, we conducted an immunohistochemical study of this protein in an amphibian by using an antibody specific for Dmrt1. No positive signal was found in the indifferent gonad of tadpoles of Rana rugosa at early stages. However, in the testis of tadpoles at later stages (XV-XXV) and in frogs one month after metamorphosis, this protein was expressed in interstitial cells and Sertoli cells. In the testis of adult frogs, germ cells also expressed Dmrt1 protein. RT-PCR analysis revealed that the gene for this protein was not transcribed at any time during ovarian development, but was expressed in the female to male sex-reversed gonad. This was true when immunohistological studies were performed. In addition, Southern blot analysis showed DMRT1 to be an autosomal gene. Taken together, our findings indicate that Dmrt1 protein is expressed by interstitial cells, Seroli cells and germ cells in the testis of R. rugosa. Dmrt1 may thus be very involved in the testicular differentiation of amphibians.
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Affiliation(s)
- S Aoyama
- Department of Biology, School of Education, Waseda University, Shinjuku-ku, Tokyo, Japan
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24
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Kase H, Aoyama S, Ichimura M, Ikeda K, Ishii A, Kanda T, Koga K, Koike N, Kurokawa M, Kuwana Y, Mori A, Nakamura J, Nonaka H, Ochi M, Saki M, Shimada J, Shindou T, Shiozaki S, Suzuki F, Takeda M, Yanagawa K, Richardson PJ, Jenner P, Bedard P, Borrelli E, Hauser RA, Chase TN. Industry forum: Progress in pursuit of therapeutic A2A antagonists: The adenosine A2A receptor selective antagonist KW6002: Research and development toward a novel nondopaminergic therapy for Parkinson's disease. Neurology 2003; 61:S97-100. [PMID: 14663020 DOI: 10.1212/01.wnl.0000095219.22086.31] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.1] [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: 11/15/2022] Open
Abstract
Research and development of the adenosine A2A receptor selective antagonist KW6002 have focused on developing a novel nondopaminergic therapy for Parkinson's disease (PD). Salient pharmacologic features of KW6002 were investigated in several animal models of PD. In rodent and primate models, KW6002 provides symptomatic relief from parkinsonian motor deficits without provoking dyskinesia or exacerbating existing dyskinesias. The major target neurons of the A2A receptor antagonist were identified as GABAergic striatopallidal medium spiny neurons. A possible mechanism of A2A receptor antagonist action in PD has been proposed based on the involvement of striatal and pallidal presynaptic A2A receptors in the "dual" modulation of GABAergic synaptic transmission. Experiments with dopamine D2 receptor knockout mice showed that A2A receptors can function and anti-PD activities of A2A antagonists can occur independent of the dopaminergic system. Clinical studies of KW6002 in patients with advanced PD with L-dopa-related motor complications yielded promising results with regard to motor symptom relief without motor side effects. The development of KW6002 represents the first time that a concept gleaned from A2A biologic research has been applied successfully to "proof of concept" clinical studies. The selective A2A antagonist should provide a novel nondopaminergic approach to PD therapy.
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26
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Miyoshi I, Maki K, Kon Y, Yamashita T, Aoyama S, Hayashizaki Y, Kasai N. Targeting oncogenesis by introduction of a 5.2-kbp segment of the 5' regulatory region of the human thyrotropin beta-subunit gene. Endocr Res 2001; 27:387-98. [PMID: 11794463 DOI: 10.1081/erc-100107863] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We produced transgenic mice carrying a fusion gene (TTP-5) consisting of a 5.2-kbp segment of the 5' flanking sequence of the human thyrotropin beta-subunit (TSH beta) gene linked to the simian virus 40 large T antigen (SVT) gene. These mice developed pituitary tumors 6 months after birth and wasted away. With the 5.2-kbp TSH beta 5' flanking region governing SVT expression, SVT mRNA was present in the pituitary and testis but not in other tissues, as detected by the reverse transcriptase-polymerase chain reaction. Histological and immunohistochemical analyses showed that the pituitary tumors of the transgenic mice were composed of moderately differentiated pituitary cells that expressed TSH, growth hormone, and prolactin. These results indicate that the 5.2-kbp segment of the human TSH beta 5' regulatory region is sufficient to drive expression of SVT and induce tumorigenesis of hormone-producing pituitary cells in transgenic mice.
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Affiliation(s)
- I Miyoshi
- Institute for Animal Experimentation, Tohoku University Graduate School of Medicine, Sendai, Japan.
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27
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Aoyama S, Kino K, Amagasa T, Kayano T, Ichinose S, Kimijima Y. Differential diagnosis of calcium pyrophosphate dihydrate deposition of the temporomandibular joint. Br J Oral Maxillofac Surg 2000; 38:550-3. [PMID: 11010794 DOI: 10.1054/bjom.2000.0313] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Calcium pyrophosphate dihydrate (CPPD) deposition disease (pseudogout) of the temporomandibular joint (TMJ) is rare. It is characterized by the presence of crystal deposits that are birefringent under polarized light. Although these crystals are characteristically weakly birefringent, some other crystals such as those of calcium oxalate, synthetic steroids, and ethylenediaminetetraacetic acid are also birefringent. The differential diagnosis should therefore be based on a quantitative analysis of crystals or observation of the crystal structure in calcified sections. We present a case of CPPD deposition disease of the TMJ and report on the value of such an analysis to substantiate the diagnosis.
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Affiliation(s)
- S Aoyama
- Maxillofacial Surgery, Maxillofacial Reconstruction and Function, Division of Maxillofacial and Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
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28
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Aoyama S, Kase H, Borrelli E. Rescue of locomotor impairment in dopamine D2 receptor-deficient mice by an adenosine A2A receptor antagonist. J Neurosci 2000; 20:5848-52. [PMID: 10908627 PMCID: PMC6772554] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
In Parkinson's disease a degeneration of dopaminergic neurons of the nigrostriatal pathway is observed. Loss of dopaminergic regulation of striatal neuron activity results in altered motor functions. Adenosine A2A (A2AR) and dopamine D2 (D2R) receptors are colocalized in striatal medium spiny neurons. It has been proposed that adenosine binding to A2AR lowers the affinity of dopamine for D2R, thus modulating the function of this receptor. Absence of D2R in knockout mice (D2R-/-) results in impaired locomotion and coordinated movements. This indicates that absence of dopamine in Parkinson's disease might principally affect D2R-mediated effects with regard to locomotor functions. A2AR-selective antagonists have been demonstrated to have anti- parkinsonian activities in various models of Parkinson's disease in rodents and nonhuman primates. In this article, D2R-/- mice were used to explore the possibility that an A2AR antagonist might reestablish their motor impairment. Interestingly, blockade of A2AR rescues the behavioral parameters altered in D2R-/- mice. In addition, the level of expression of enkephalin and substance P, which were altered in D2R-/-, were also reestablished to normal levels after A2AR antagonist treatment. These results show that A2AR and D2R have antagonistic and independent activities in controlling neuronal and motor functions in the basal ganglia. They also provide evidence that selective A2AR antagonists can exhibit their anti-parkinsonian activities through a nondopaminergic mechanism.
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Affiliation(s)
- S Aoyama
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch Cedex, France
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29
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Ohbayasi Y, Aoyama S, Masui H, Kat K, Chiba M. Development of a charged-particle nuclear reaction data retrieval system on IntelligentPad: CONTIP. J Inf Sci 2000. [DOI: 10.1177/0165551004232998] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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30
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Abstract
Reactions of a series of 1-aminobenzimidazoles and 1-amino-3-methylbenzimidazolium chlorides with 2,4-pentanedione were carried out and pyridazino[1,6-a]benzimidazoles and 2-pyrazolylanilines were generated. The product ratios of these compounds remarkably depended on the reaction conditions and on the electronic character of the substituent at the benzene moiety. The possible mechanisms involved in these reactions are discussed.
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Affiliation(s)
- T Kaiya
- Faculty of Pharmaceutical Sciences, Nagoya City University, Japan
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31
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Masui H, Aoyama S, Myo T, Kato K. Partial Decay Widths in Coupled-Channel Systems with the Complex-Scaled Jost Function Method. ACTA ACUST UNITED AC 1999. [DOI: 10.1143/ptp.102.1119] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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32
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Kaiya T, Aoyama S, Kohda K. Reactions of chloride salts of 7-amino-9-ethylguanine and 1-amino-3-methylbenzimidazoles with lead(IV) acetate: formation of 8-aza-9-ethylguanine and 1-methyl-1H-benzotriazoles. Bioorg Med Chem Lett 1999; 9:961-4. [PMID: 10230620 DOI: 10.1016/s0960-894x(99)00123-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 11/23/2022]
Abstract
Reaction of 7-amino-9-ethylguaninium chloride with lead(IV) acetate (LTA) in MeOH yielded 8-aza-9-ethylguanine. Similarly, the reaction of 1-amino-3-methylbenzimidazolium chloride or its substituted derivatives (6-methyl, 5,6-dimethyl and 5-nitro) with LTA gave the corresponding 1-methyl-1H-benzotriazole (or 1-methyl-2-azabenzimidazole) derivatives along with N-methylformananilide derivatives.
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Affiliation(s)
- T Kaiya
- Faculty of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
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33
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Umeda M, Aoyama S, Kaiya T, Kohda K, Maruyama W, Naoi M. Oxidation of 1-amino-4-phenyl-1,2,3,6-tetrahydropyridine, a 1-amino analog of MPTP, by type A and B monoamine oxidase. J Neural Transm (Vienna) 1999; 105:1253-64. [PMID: 9928894 DOI: 10.1007/s007020050128] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 11/30/2022]
Abstract
A 1-amino analog of MPTP, 1(N)-amino-4-phenyl-1,2,3,6-tetrahydropyridine, was synthesized and the oxidation was examined using human synaptosomal mitochondria as sources of type A and B monoamine oxidase. An oxidation product, 1-amino-4-phenylpyridinium ion, was quantified by high-performance liquid chromatography-fluorometric detection. The amino analog was a substrate of both type A and B monoamine oxidase and the oxidation depended linearly on the enzyme amount and the reaction time with an optimal pH around 7.5. After the systemic injection of the amino analog in C57/black mice for one week, 1-amino-4-phenylpyridinium ion was detected in the brain. 1(N)-Amino-4-phenyl-1,2,3,6-tetrahydropyridine was proved to be cytotoxic to pheochromocytoma PC12 cells, and it may be a new neurotoxin bioactivated through the oxidation by type A and B monoamine oxidase.
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Affiliation(s)
- M Umeda
- Faculty of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
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34
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Morioka Y, Aoyama S, Kageyama Y, Hayaishi T, Suzuki IH, Iosyama G, Asaoka S, Ishiguro E, Nakamura M. Dissociative photoionisation of N2from threshold to 29 eV. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/17/14/010] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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35
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Kohda K, Noda Y, Aoyama S, Umeda M, Sumino T, Kaiya T, Maruyama W, Naoi M. Cytotoxicity of 1-amino-4-phenyl-1,2,3,6-tetrahydropyridine and 1-amino-4-phenylpyridinium ion, 1-amino analogues of MPTP and MPP+, to clonal pheochromocytoma PC12 cells. Chem Res Toxicol 1998; 11:1249-53. [PMID: 9815183 DOI: 10.1021/tx980032o] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 11/29/2022]
Abstract
1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) induces parkinsonism in humans after its oxidation into 1-methyl-4-phenylpyridinium ion (MPP+) by type B monoamine oxidase. The 1-amino analogues of MPTP and MPP+, 1-amino-4-phenyl-1,2,3, 6-tetrahydropyridine (APTP) and 1-amino-4-phenylpyridinium ion (APP+), were synthesized, and their cytotoxicity to clonal pheochromocytoma PC12 cells was examined using a tetrazolium formazan assay. After incubation for 48 and 72 h, both APP+ and APTP were found to be cytotoxic to PC12 cells, whereas with the N-methyl analogues, only MPP+, but not MPTP, was cytotoxic. The cytotoxicity of APTP increased with incubation time and equaled that of MPP+ after 72 h. It was found that APTP was oxidized to APP+ by type A monoamine oxidase in PC12 cells, suggesting that APP+ itself may damage the cells. In addition to APTP and APP+, N-amino analogues of N-methylisoquinolines and related derivatives were also synthesized and examined for their cytotoxicity to PC12 cells.
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Affiliation(s)
- K Kohda
- Faculty of Pharmaceutical Sciences, Nagoya City University, Tanabedori, Mizuho-ku, Nagoya 467, Japan.
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36
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Nakano M, Saitoh S, Takagi S, Fujisawa J, Aoyama S, Takahashi H, Hayashi Y, Obara F, Shimamoto K. [Prevalence of glucose intolerance in Japan--from the National Circulatory Disorders Basic Survey, 1990]. Nihon Ronen Igakkai Zasshi 1998; 35:839-44. [PMID: 10064971 DOI: 10.3143/geriatrics.35.839] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 11/11/2022]
Abstract
The prevalence of glucose intolerance was surveyed in 8,063 people over 30 years old from the general population of Japan. The data used in the analysis were from the Fourth National Circulatory Disorders Basic Survey, which was conducted in 1990. Survey items included history of diabetes mellitus, body mass index (BMI) and daily life activity. Blood and urine were also examined, and the blood glucose levels, presence or absence of sugar in urine, and levels of glycohemoglobin (HbA1c) were determined. Glucose intolerance was identified from the blood glucose level, HbA1c level and history of diabetes mellitus. The frequency of glucose intolerance was 8.6% in all subjects (11.9% in men and 6.3% in women). The frequency was higher in older people: 1.7 times higher in men over 65 years old and 2.5 times higher in women over 65 years old. Among people over 40 years old, glucose intolerance was significantly more prevalent in men than in women. It was also significantly more prevalent in men living in big cities than in men living in rural areas. Among obese male subjects and men with a low level of activity in daily life, the frequency of glucose intolerance was higher than in normal male subjects. The level of activity in daily life tended to be lower for people living in big cities than for those in rural areas. The results suggest that the prevalence of glucose intolerance depends on the environment in which people live. The results also indicate that raising the level of activities in daily life might help prevent diabetes mellitus.
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Affiliation(s)
- M Nakano
- Second Department of Internal Medicine, Sapporo Medical University, School of Medicine
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37
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Ishida Y, Utikoshi M, Kurosaki M, Ohta K, Chujo T, Aoyama S, Ohsawa K, Saito K, Yokoyama H, Ohta S. Hepatic veno-occlusive disease in a case of polymyositis associated with thrombotic thrombocytopenic purpura/hemolytic uremic syndrome. Intern Med 1998; 37:694-9. [PMID: 9745858 DOI: 10.2169/internalmedicine.37.694] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A 50-year-old woman was treated with prednisolone for polymyositis. During the therapy, thrombotic thrombocytopenic purpura/hemolytic uremic syndrome (TTP/HUS) occurred. Neither plasma infusion nor plasma exchange could relieve the clinical manifestations of TTP/HUS. Moreover, massive ascites appeared and worsened her condition. She died approximately one year after the diagnosis of polymyositis. The autopsy revealed centri-lobular hepatic necrosis and nonthrombotic obliteration of hepatic small veins. The diagnosis of hepatic veno-occlusive disease (VOD) was made. It was suspected that common factors other than cytoreductive therapy had damaged the endothelium and caused TTP/HUS and VOD in a case of polymyositis.
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Affiliation(s)
- Y Ishida
- Department of Internal Medicine, Toyama City Hospital, Toyama
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38
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Abstract
Oxidation of seven 1-methylbenzimidazole (MBI) derivatives (with pKa's ranging from 1.6 to 6.0) was carried out with m-chloroperoxybenzoic acid and structures of the products formed were identified. (Condensed benzene moiety-hydroxylated)-2-(m-chlorobenzyloxy)-MBIs and 2-oxo-MBIs were obtained from MBIs with pKa's of more than 5.6 and about 3.3, respectively.
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Affiliation(s)
- T Kaiya
- Faculty of Pharmaceutical Sciences, Nagoya City University, Japan
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39
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Kokubo Y, Shibuya M, Hino M, Wagatsuma A, Aoyama S, Matsuda K, Kyo D, Kudo S. [Effect of clarithromycin on experimental pulmonary metastasis]. Jpn J Antibiot 1998; 51 Suppl A:61-4. [PMID: 9597488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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40
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Aoyama S, Katayama Y, Terashi A. [The effect of FK 506, an immunosuppressant, on cerebral infarction volume in focal cerebral ischemia in rats]. Nihon Ika Daigaku Zasshi 1997; 64:416-21. [PMID: 9366145 DOI: 10.1272/jnms1923.64.416] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The effect of FK 506, an immunosuppressant which is widely used in the transplantation of liver, kidney and bone marrow, on cerebral infarction volume in transient focal ischemia was investigated. Focal cerebral ischemia was produced by 2 h occlusion of the left middle cerebral artery in rats. FK 506 (0.3 mg/kg body weight) and vehicle were administered intravenously immediately after induction of cerebral ischemia. After 24 h reperfusion the rats were sacrificed and brain infarct volume and edema volume were determined. The FK 506 treatment group showed a significantly reduced infarct volume in the cerebral cortex when it was compared with the vehicle treatment group, but infarct volume was not significantly reduced in the striatum which was the ischemic core in this focal ischemia model. However, FK 506 did not reduce the edema volume significantly. These results suggest that the reduction of infarct volume is a result of the neuroprotective effect of FK 506. This immunosuppressant may be useful in the treatment of cerebral infarction.
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Affiliation(s)
- S Aoyama
- Second Department of Internal Medicine, Nippon Medical School, Tokyo, Japan
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41
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Kon Y, Miyoshi I, Maki K, Yamashita T, Aoyama S, Watanabe T, Hayashizaki Y, Kasai N. Morphological study of pituitary tumorigenesis in transgenic mice induced by hybrid oncogene of the thyrotropin beta-subunit and the simian virus 40 large T-antigen. Histol Histopathol 1997; 12:981-90. [PMID: 9302559] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We have created a transgenic mouse, TTP-1, generating anterior pituitary tumors by using the simian virus 40 (SV40) large T antigen gene and human thyrotropin beta-subunit gene. To examine characteristics of tumors, histological details were investigated using light and electron microscopies. The main tumor tissues, composed of small chromophobe cells, were located inferior to but clearly separated from the hypothalamus; however, neuron fibers probably derived from the hypothalamus were observed to invade some tumor tissues. Some differentiated endocrine cells occupied the caudal region of the tumor. Immunohistochemically, SV40 large T antigen was expressed in the cell nucleus of the undifferentiated cell area, whereas cells expressing several hormones were mainly distributed in the differentiated cell area. Electron microscopically, the undifferentiated cells were divided into 2 types; electron-dense and -lucent cells, the nuclei of which were composed of obscured nucleoli and many notable invaginations of the nuclear membrane. No intracellular microfilamentous structures were observed. Sometimes it was noted that cytoplasmic processes were connected with gap junctions. In the intercellular spaces, there were neuron fibrous and synapse-like structures. In the differentiated cell area, the cell membranes directly contacting other cells were relatively smooth, and many gap junctions were demonstrated. Secretory granules, which were round and less than 100 nm in diameter, were more electron dense in smaller cells than in larger cells. They were aligned just below the cell membrane. Immuno-electron microscopically, positive reactions for SV40 were observed in the nuclei of the undifferentiated cell area. In the differentiated cell area, most of the secretory granules were labeled by GH. TTP-1 transgenic mice should provide a valuable animal model for studying the pathogenesis of anterior pituitary tumors.
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Affiliation(s)
- Y Kon
- Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
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42
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Kokubo Y, Shibuya M, Hino M, Azuma A, Aoyama S, Matsuda K, Shu D, Kudo S. [Effects of clarithromycin on experimental pulmonary metastasis]. Jpn J Antibiot 1997; 50 Suppl A:35-7. [PMID: 9597436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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43
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Takami H, Koshimura H, Kishibayashi N, Ishii A, Nonaka H, Aoyama S, Kase H, Kumazawa T. Indole derivatives as a new class of steroid 5 alpha-reductase inhibitors. J Med Chem 1996; 39:5047-52. [PMID: 8978835 DOI: 10.1021/jm9601819] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [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: 02/03/2023]
Abstract
A series of indole derivatives with varied substituents on the alpha, beta-unsaturated double bond were synthesized and evaluated for their ability to inhibit rat prostatic 5 alpha-reductase. Compounds possessing an ethyl substituent at the beta-position of the double bond showed potent inhibitory activity. Among them, (Z)-4-{2-[[3-[1-(4,4'-difluorobenzhydryl)indol-5-yl]-2-pentenoy l]- amino]phenoxy}butyric acid (16, KF20405) showed the maximum potency with an IC50 value of 0.48 +/- 0.086 nM, which was 20-fold higher potency than 1 (MK-906). Compound 16 effectively inhibited DHT production 4 h after a 3 mg/kg oral administration. Several potent indole derivatives, 1 and 2 ((+/-)-ONO-3805), were tested versus rat and human isozymes. Nonsteroidal inhibitors such as indole derivatives and 2 were 2-3 orders of magnitude less potent for human type 2 isozyme than steroidal inhibitor 1 and expressed a significant species deference for these isozymes.
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Affiliation(s)
- H Takami
- Pharmaceutical Research Laboratories, Kyowa Hakko Kogyo Co., Ltd., Shizuoka, Japan
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44
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Inomata T, Ninomiya H, Kawakami S, Sakaguchi K, Sakita K, Aoyama S, Shirai M, Masaoka T, Akahori F. Morphometric study on the fetal thyroid gland in the nude mouse (BALB/cAnNCrj-nu/nu). Exp Anim 1996; 45:385-8. [PMID: 8902503 DOI: 10.1538/expanim.45.385] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 02/02/2023] Open
Abstract
Fetal thyroid glands of athymic nude mice (BALB/cAnNCrj-nu/nu) were examined morphometrically on day 18 of gestation. Compared to euthymic litter mate controls (BALB/ cAnNCrj-nu/+), both the cell height and diameter of thyroid follicles were significantly smaller; fewer well-developed follicles were found in the peripheral region of the thyroid; the body weight and total volume of the thyroid gland were also smaller in nude mice. These results suggest underdevelopment of the fetal thyroid gland of the athymic nude mouse.
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Affiliation(s)
- T Inomata
- Department of Laboratory Animal Science, College of Environmental Health, Azabu University, Kanagawa, Japan
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45
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Aoyama S, Hinoue Y, Takahashi H, Yoshimitsu Y, Kusajima Y, Hirono T, Takayanagi N, Akao N, Kondou K. [Clinical study of ten cases with acute abdomen after eating raw firefly squid (Watasenia scintillans, Hotaruika), which are probably due to type X larvae of the suborder spirurina]. Nihon Shokakibyo Gakkai Zasshi 1996; 93:312-21. [PMID: 8642768] [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] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
We studied ten cases with abdominal pain after eating raw firefly squid, Watasenia scintillans, Hotaruika. Characteristic clinical features were abdominal pain, nausea, vomiting, diarrhea, creeping eruption and ileus with ascites. In ten patients, there were all cases with abdominal pain, nine with nausea and vomiting, four with diarrhea, one with creeping eruption, six with ileus. Laboratory examination revealed eosinophilia on peripheral blood in ten cases and high serum IgE value in nine cases. The infection rate of type X lavae of the suborder spirurina in Watasenia scintillans is almost 3%, so we measured the antibody to type X larvae of the suborder spirurina in nine patients by indirect fluorescent antibody method and the antibody titer was positive in seven cases. Most patients recovered in several days from first visit. But one patient was diagnosed peritonitis and operated with partial ileectomy. Pathological finding of resected specimen showed an erosion in the mucosal layer and an inflammation with marked eosinophilia in the submucosal layer. These results suggest that abdominal complaints after eating Watasenia scintillans are due to type X larvae of the suborder spirurina.
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Affiliation(s)
- S Aoyama
- Department of Internal Medicine, Toyama Municipal Hospital, Japan
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46
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Abstract
Since animal intoxication related to corn-based feed is frequently observed in the State of Paraná, Brazil, natural contamination by fumonisins in 48 corn samples (39 from the State of Paraná, and 9 from the Brazilian tropical states, Mato Grosso do Sul and Goias) harvested in 1990-1991 was investigated, along with fungal flora. The total mould count ranged from 6.3 x 10(2) to 5.5 x 10(7) cfu/g, and Fusarium moniliforme and Aspergillus species belonging to section Flavi were detected in 41 and 33 samples, respectively. Regarding the samples from the State of Paraná, F. moniliforme was present in 33 samples at a count of 1.0 x 10(2) to 1.6 x 10(7) cfu/g and Aspergillus spp. in section Flavi in 27 samples at 1.0 x 10(2) to 1.0 x 10(6) cfu/g. HPLC analysis of fumonisins in the corn showed that fumonisins B1 (FB1) and B2 (FB2) were positive for 97.4% and 94.8% of samples respectively. All the corn from North Paraná was positive for fumonisins, with average FB1 levels of 4.79 micrograms/g and average FB2 levels of 3.95 micrograms/g: the Central-West region had average levels of 3.30 and 2.52 micrograms/g, and the Central-East had average of 3.25 and 2.34 micrograms/g, respectively. Except for one negative sample all the corn samples from the Central Region were positive for fumonisins, averaging FB1 levels being 5.45 micrograms/g and FB2 levels being 5.09 micrograms/g. Out of eight samples from the tropical state of Mato Grosso do Sul, F. moniliforme was detected in seven and Aspergillus spp. in section Flavi in five samples with average FB1 levels of 10.59 micrograms/g and average for FB2 levels of 10.31 micrograms/g. The samples from Goias were also contaminated with these two fungi, with the FB1 contamination being 5.83 and the FB2 contamination 3.62 micrograms/g.
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Affiliation(s)
- E Y Hirooka
- Departamento Tecnologia de Alimentos e Medicamentos, CCA Universidade Estadual de Londrina, Paraná, Brazil
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47
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Imaizumi T, Katoh T, Kanno K, Aoyama S, Hayashi E, Takagi Y, Shibata S, Abiru M, Takigami Y, Fujise Y. [Marked dilatation of the bilateral common carotid artery: a case report]. No Shinkei Geka 1995; 23:365-9. [PMID: 7739779] [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] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We reported a rare case of marked dilatation of the bilateral common carotid artery (CCA) associated with stenosis of the left middle cerebral artery (MCA). A 64-year-old female was admitted with right hemiparesis and dysarthria. She was hospitalized 2 years ago for cholecystitis. For 5 years, she has been under medical treatment for hypertension, diabetes mellitus, hyperlipidemia, cardiac failure associated with hypertrophic cardiomyopathy, and atrial fibrillation. Brain CT scan showed infarction of the left corona radiata. Angiography revealed marked dilatation of the bilateral CCA and the internal carotid artery (ICA), moderate dilatation of the innominate artery and the right subclavian artery, kinking of the right CCA, diverticular outpouching of the left ICA, and stenosis of the right external carotid artery and the left MCA. Breast CT scan revealed moderate dilatation and marked calcification of the ascending aorta and the aortic arch. Laboratory examination did not show any sign of inflammation, rheumatoid factor (RA), antistreptolysis-O (ASLO) and antinucleotic antibody. Based on the clinical course, radiological findings and laboratory data, possible diagnosis of the dilatation of the bilateral CCA was discussed with particular emphasis on arteriosclerotic aneurysm and aortitis syndrome.
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Affiliation(s)
- T Imaizumi
- Department of Neurosurgery, Oji General Hospital
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Maki K, Miyoshi I, Kon Y, Yamashita T, Sasaki N, Aoyama S, Takahashi E, Namioka S, Hayashizaki Y, Kasai N. Targeted pituitary tumorigenesis using the human thyrotropin beta-subunit chain promoter in transgenic mice. Mol Cell Endocrinol 1994; 105:147-54. [PMID: 7859921 DOI: 10.1016/0303-7207(94)90164-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We have generated transgenic mice that express the simian virus 40 (SV40) large T antigen under the control of a 1109 bp 5'-flanking sequence of the human thyrotropin beta-subunit (TSH beta) gene. The hybrid gene, termed TTP-1, was microinjected into fertilized mouse eggs and 11 transgenic mice were obtained. One of the transgenic mice, a female, a phenotypical dwarf, developed a pituitary tumor and wasted away from 7 to 9 weeks after birth. To establish the transgenic mouse line, her ovaries were transferred to a normal female, whose ovaries were removed beforehand. To examine the tissue specificity of transgene expression, mRNA of SV40 large T antigen was monitored in various tissues from the transgenic mice by the reverse transcriptase-polymerase chain reaction analysis, and was detected only in the pituitary. Histological and immunohistochemical analyses showed that the pituitary tumors of the transgenic mice were composed of poorly differentiated pituitary cells expressing SV40 large T antigen. These results indicated that the 1109 bp sequence of the human TSH beta 5'-flanking region is essential for pituitary-specific expression of SV40 large T antigen in transgenic mice, which exhibited a dwarf phenotype and developed pituitary tumors. The tumors were composed of undifferentiated cells and did not produce thyrotropin. These transgenic mice should provide a valuable animal model for studying the pathogenesis of anterior pituitary tumors.
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MESH Headings
- Animals
- Antigens, Polyomavirus Transforming/analysis
- Antigens, Polyomavirus Transforming/genetics
- Base Sequence
- Cell Transformation, Neoplastic/genetics
- Cell Transformation, Neoplastic/pathology
- DNA Primers/analysis
- DNA Primers/chemistry
- DNA Primers/genetics
- Disease Models, Animal
- Female
- Gene Expression Regulation, Neoplastic
- Immunohistochemistry
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Transgenic
- Molecular Sequence Data
- Pituitary Gland, Anterior/chemistry
- Pituitary Gland, Anterior/metabolism
- Pituitary Gland, Anterior/pathology
- Pituitary Neoplasms/etiology
- Pituitary Neoplasms/genetics
- Pituitary Neoplasms/immunology
- Polymerase Chain Reaction
- Promoter Regions, Genetic/genetics
- RNA, Messenger/analysis
- RNA, Messenger/genetics
- Thyrotropin/analysis
- Thyrotropin/genetics
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Affiliation(s)
- K Maki
- Department of Laboratory Animal Science, School of Medicine, Hokkaido University, Sapporo, Japan
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