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Suzuki S, Motogi J, Matsuzawa W, Takayanagi T, Umemoto T, Hirota N, Nakai H, Hyodo A, Satoh K, Otsuka T, Arita T, Yagi N, Yajima J, Yamashita T. Identifying patients with atrial fibrillation during sinus rhythm on ECG: confirming the utility of artificial intelligence algorithm in a small-scale cohort without structural heart diseases. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.3050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Detection of atrial fibrillation (AF) out of electrocardiograph (ECG) on sinus rhythm (SR) using artificial intelligence (AI) algorithm has been widely studied within recent couple of years. Generally, it is believed that a huge number of ECGs are necessary for developing an AI-enabled ECG to be adequate to correspond to a lot of minor variations of ECGs. For example, structural heart diseases have typical ECG characteristics, but they could be a noise for the purpose of detecting the small signs of electrocardiographic signature of AF. We hypothesized that when patients with structural heart diseases are excluded, AI-enabled ECG for identifying patients with AF can be developed with a small number of ECGs.
Methods
We developed an AI-enabled ECG using a convolutional neural network to detect the electrocardiographic signature of AF present during normal sinus rhythm (NSR) using a digital, standard 10-second, 12-lead ECGs. We included all patients who newly visited the Cardiovascular Institute with at least one NSR ECG between Feb 1, 2010, and March 31, 2018. We classified patients with at least one ECG with a rhythm of AF as positive for AF (AF label) and others as negative for AF (SR label). We allocated ECGs to the training, internal validation, and testing datasets in a 7:1:2 ratio. We calculated the area under the curve (AUC) of the receiver operating characteristic curve for the internal validation dataset to select a probability threshold, which we applied to the testing dataset. We evaluated model performance on the testing dataset by calculating the AUC and the sensitivity, specificity, F1 score, and accuracy with two-sided 95% confidence intervals (CIs).
Results
We totally included 19170 patients with 12-lead ECG. After excluding patients with structural heart diseases, 12825 patients with NSR ECGs at the initial visit were identified (1262 were clinically diagnosed as AF anytime during the time course and 11563 were never diagnosed as AF). Of 11563 non-AF patients, 1818 patients who were followed over 1095 days were selected for the analysis with the SR label, to secure the robustness for maintaining SR. Of 1262 AF patients, 251 patients were selected for the analysis with the AF label, of whom a NSR ECG within 31 days before or after the index AF ECG (the first AF ECG during the time course) could be obtained. In the patients with AF label, the NSR ECG of which the date was the nearest to the index AF ECG was selected for the analysis. The AI-enabled ECG showed an AUC of 0.88 (0.84–0.92) with sensitivity 81% (72–88), specificity 80% (77–83), F1 score 50% (43–57), and overall accuracy 80% (78–83).
Conclusion
An AI-enabled ECG acquired during NSR allowed identification of patients with AF in a small population without structural heart diseases.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- S Suzuki
- Cardiovascular Institute, Department of cardiovascular medicine, Tokyo, Japan
| | - J Motogi
- Nihon Kohden Corporation, Tokyo, Japan
| | | | | | - T Umemoto
- Nihon Kohden Corporation, Tokyo, Japan
| | - N Hirota
- Cardiovascular Institute, Department of cardiovascular medicine, Tokyo, Japan
| | - H Nakai
- Cardiovascular Institute, Department of cardiovascular medicine, Tokyo, Japan
| | - A Hyodo
- Nihon Kohden Corporation, Tokyo, Japan
| | - K Satoh
- Nihon Kohden Corporation, Tokyo, Japan
| | - T Otsuka
- Cardiovascular Institute, Department of cardiovascular medicine, Tokyo, Japan
| | - T Arita
- Cardiovascular Institute, Department of cardiovascular medicine, Tokyo, Japan
| | - N Yagi
- Cardiovascular Institute, Department of cardiovascular medicine, Tokyo, Japan
| | - J Yajima
- Cardiovascular Institute, Department of cardiovascular medicine, Tokyo, Japan
| | - T Yamashita
- Cardiovascular Institute, Department of cardiovascular medicine, Tokyo, Japan
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2
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Taniguchi Y, Matsuoka Y, Onishi H, Nakai H, Okada K, Emoto N, Hirata K. Survival in patients with chronic thromboembolic pulmonary hypertension in the modern management era. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
The management of non-operable chronic thromboembolic pulmonary hypertension (CTEPH) has recently evolved with the availability of balloon pulmonary angioplasty (BPA) and pulmonary vasodilators. We launched BPA program since 2011. The aim was to analyze survival and treatment efficacy in the modern management era.
Method and result
We retrospectively reviewed data from 143 consecutive CTEPH patients diagnosed in our university from January 2011 (i.e. after the availability of BPA) to December 2019. Forty-one patients underwent PEA, in these 25 patients underwent additional BPA (Hybrid group) and other patients were treated with only PEA (PEA group). Ninety patients underwent BPA (BPA group), remaining 12 patients had not undergone any interventional treatments. The 1- and 5-year survival rates of operated patients (n=41) were 97.4% and 90.0%, compared to96.9% and 86.9% in not-operated patients (n=102), respectively (p=0.579) (Figure). There was no death in Hybrid group. Percent decrease of pulmonary vascular resistance in PEA group, Hybrid group, BPA group were −75.4±9.9%, −74.3±11.8%, −56.3±22.2%, respectively (p<0.01, one-way ANOVA). Absolute decrease of mean pulmonary artery pressure in each groups were −20.3±9.5mmHg, −24.5±8.8mmHg, −16.4±9.2mmHg, respectively (p<0.01, one-way ANOVA).
Conclusion
There was no longer significant difference of long-term survival between operated and not-operated CTEPH. Moreover, Hybrid approach might have the potential to lead notable improvement in the prognosis of CTEPH. BPA and PEA would be mutually complementary therapies in the modern management era.
Figure 1
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- Y Taniguchi
- Kobe University Graduate School of Medicine, Department of Cardiovascular Medicine, Kobe, Japan
| | - Y Matsuoka
- Kobe University Graduate School of Medicine, Department of Cardiovascular Medicine, Kobe, Japan
| | - H Onishi
- Kobe University Graduate School of Medicine, Department of Cardiovascular Medicine, Kobe, Japan
| | - H Nakai
- Kobe University, Division of Cardiovascular Surgery, Department of Surgery, Kobe, Japan
| | - K Okada
- Kobe University, Division of Cardiovascular Surgery, Department of Surgery, Kobe, Japan
| | - N Emoto
- Kobe University Graduate School of Medicine, Department of Cardiovascular Medicine, Kobe, Japan
| | - K Hirata
- Kobe University Graduate School of Medicine, Department of Cardiovascular Medicine, Kobe, Japan
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3
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Nakamura S, Miyado M, Saito K, Katsumi M, Nakamura A, Kobori Y, Tanaka Y, Ishikawa H, Yoshida A, Okada H, Hata K, Nakabayashi K, Okamura K, Ogata H, Matsubara Y, Ogata T, Nakai H, Fukami M. Next-generation sequencing for patients with non-obstructive azoospermia: implications for significant roles of monogenic/oligogenic mutations. Andrology 2018; 5:824-831. [PMID: 28718531 DOI: 10.1111/andr.12378] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 03/29/2017] [Accepted: 04/09/2017] [Indexed: 11/29/2022]
Abstract
Azoospermia affects up to 1% of adult men. Non-obstructive azoospermia is a multifactorial disorder whose molecular basis remains largely unknown. To date, mutations in several genes and multiple submicroscopic copy-number variations (CNVs) have been identified in patients with non-obstructive azoospermia. The aim of this study was to clarify the contribution of nucleotide substitutions in known causative genes and submicroscopic CNVs in the genome to the development of non-obstructive azoospermia. To this end, we conducted sequence analysis of 25 known disease-associated genes using next-generation sequencing and genome-wide copy-number analysis using array-based comparative genomic hybridization. We studied 40 Japanese patients with idiopathic non-obstructive azoospermia. Functional significance of molecular alterations was assessed by in silico analyses. As a result, we identified four putative pathogenic mutations, four rare polymorphisms possibly associated with disease risk, and four probable neutral variants in 10 patients. These sequence alterations included a heterozygous splice site mutation in SOHLH1 and a hemizygous missense substitution in TEX11, which have been reported as causes of non-obstructive azoospermia. Copy-number analysis detected five X chromosomal or autosomal CNVs of unknown clinical significance, in addition to one known pathogenic Y chromosomal microduplication. Five patients carried multiple molecular alterations. The results indicate that monogenic and oligogenic mutations, including those in SOHLH1 and TEX11, account for more than 10% of cases of idiopathic non-obstructive azoospermia. Furthermore, this study suggests possible contributions of substitutions in various genes as well as submicroscopic CNVs on the X chromosome and autosomes to non-obstructive azoospermia, which require further validation.
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Affiliation(s)
- S Nakamura
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan.,Department of Pediatric Urology, Jichi Medical University, Children's Medical Center Tochigi, Tochigi, Japan
| | - M Miyado
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - K Saito
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan.,Department of Comprehensive Reproductive Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - M Katsumi
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan.,Department of NCCHD Child Health and Development, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - A Nakamura
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Y Kobori
- Department of Urology, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Japan
| | - Y Tanaka
- Department of Pediatrics, Tokyo Dental College Ichikawa General Hospital, Ichikawa, Japan
| | - H Ishikawa
- Reproduction Center, Tokyo Dental College Ichikawa General Hospital, Ichikawa, Japan
| | - A Yoshida
- Reproduction Center, Kiba Park Clinic, Tokyo, Japan
| | - H Okada
- Department of Urology, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Japan
| | - K Hata
- Department of Maternal-Fetal Biology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - K Nakabayashi
- Department of Maternal-Fetal Biology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - K Okamura
- Department of Systems BioMedicine, National Research Institute for Child Health and Development, Tokyo, Japan
| | - H Ogata
- Department of Maternal-Fetal Biology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Y Matsubara
- National Research Institute for Child Health and Development, Tokyo, Japan
| | - T Ogata
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan.,Department of Pediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - H Nakai
- Department of Pediatric Urology, Jichi Medical University, Children's Medical Center Tochigi, Tochigi, Japan
| | - M Fukami
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan
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4
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Penson R, Kaminsky-Forrett MC, Ledermann J, Brown C, Plante M, Korach J, Huzarski T, Gomez de Liano Lista A, Pisano C, Friedlander M, Colombo N, Gropp-Meier M, Nakai H, Sonke G, Kim JW, Vergote I, Allen A, Pujade-Lauraine E. Efficacy of olaparib maintenance therapy in patients (pts) with platinum-sensitive relapsed ovarian cancer (PSROC) by lines of prior chemotherapy: Phase III SOLO2 trial (ENGOT Ov-21). Ann Oncol 2017. [DOI: 10.1093/annonc/mdx372.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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5
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Manabe R, Nakatsubo H, Gondo A, Murakami K, Ogo S, Tsuneki H, Ikeda M, Ishikawa A, Nakai H, Sekine Y. Electrocatalytic synthesis of ammonia by surface proton hopping. Chem Sci 2017; 8:5434-5439. [PMID: 28970922 PMCID: PMC5609515 DOI: 10.1039/c7sc00840f] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 05/20/2017] [Indexed: 11/30/2022] Open
Abstract
Highly efficient ammonia synthesis at a low temperature is desirable for future energy and material sources. We accomplished efficient electrocatalytic low-temperature ammonia synthesis with the highest yield ever reported. The maximum ammonia synthesis rate was 30 099 μmol gcat-1 h-1 over a 9.9 wt% Cs/5.0 wt% Ru/SrZrO3 catalyst, which is a very high rate. Proton hopping on the surface of the heterogeneous catalyst played an important role in the reaction, revealed by in situ IR measurements. Hopping protons activate N2 even at low temperatures, and they moderate the harsh reaction condition requirements. Application of an electric field to the catalyst resulted in a drastic decrease in the apparent activation energy from 121 kJ mol-1 to 37 kJ mol-1. N2 dissociative adsorption is markedly promoted by the application of the electric field, as evidenced by DFT calculations. The process described herein opens the door for small-scale, on-demand ammonia synthesis.
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Affiliation(s)
- R Manabe
- Department of Applied Chemistry , Waseda University , 3-4-1, Okubo, Shinjuku , Tokyo 169-8555 , Japan .
| | - H Nakatsubo
- Department of Applied Chemistry , Waseda University , 3-4-1, Okubo, Shinjuku , Tokyo 169-8555 , Japan .
| | - A Gondo
- Department of Applied Chemistry , Waseda University , 3-4-1, Okubo, Shinjuku , Tokyo 169-8555 , Japan .
| | - K Murakami
- Department of Applied Chemistry , Waseda University , 3-4-1, Okubo, Shinjuku , Tokyo 169-8555 , Japan .
| | - S Ogo
- Department of Applied Chemistry , Waseda University , 3-4-1, Okubo, Shinjuku , Tokyo 169-8555 , Japan .
| | - H Tsuneki
- Nippon Shokubai Co. Ltd. , 5-8, Nishiotabi, Suita , Osaka 564-0034 , Japan
| | - M Ikeda
- Nippon Shokubai Co. Ltd. , 5-8, Nishiotabi, Suita , Osaka 564-0034 , Japan
| | - A Ishikawa
- Department of Chemistry and Biochemistry , Waseda Univ. , Japan
| | - H Nakai
- Department of Chemistry and Biochemistry , Waseda Univ. , Japan
- ESICB , Kyoto University , Kyoto-daigaku-katsura , Kyoto , 615-8520 Japan
| | - Y Sekine
- Department of Applied Chemistry , Waseda University , 3-4-1, Okubo, Shinjuku , Tokyo 169-8555 , Japan .
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6
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Shigehara Y, Okuda S, Hayashi R, Nakai H, Abe R, Ghani Kibbi A, Kurban M, Shimomura Y. 493 Identification of a novel causative gene responsible for autosomal recessive congenital ichthyosis. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.02.513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Dissen GA, Adachi K, Lomniczi A, Chatkupt T, Davidson BL, Nakai H, Ojeda SR. Engineering a gene silencing viral construct that targets the cat hypothalamus to induce permanent sterility: An update. Reprod Domest Anim 2016; 52 Suppl 2:354-358. [PMID: 27859771 DOI: 10.1111/rda.12834] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The intent of this contribution is to provide an update of the progress we have made towards developing a method/treatment to permanently sterilize cats. Our approach employs two complementary methodologies: RNA interference (RNAi) to silence genes involved in the central control of reproduction and a virus-based gene therapy system intended to deliver RNAi selectively to the hypothalamus (where these genes are expressed) via the systemic administration of modified viruses. We selected the hypothalamus because it contains neurons expressing Kiss1 and Tac3, two genes essential for reproduction and fertility. We chose the non-pathogenic adeno-associated virus (AAV) as a vector whose tropism could be modified to target the hypothalamus. The issues that must be overcome to utilize this vector as a delivery vehicle to induce sterility include modification of the wild-type AAV to target the hypothalamic region of the brain with a simultaneous reduction in targeting of peripheral tissues and non-hypothalamic brain regions, identification of RNAi targets that will effectively reduce the expression of Kiss1 and Tac3 without off-target effects, and determination if neutralizing antibodies to the AAV serotype of choice are present in cats. Successful resolution of these issues will pave the way for the development of a powerful tool to induce the permanent sterility in cats.
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Affiliation(s)
- G A Dissen
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR, USA
| | - K Adachi
- Department of Molecular and Medical Genetics, Oregon Health and Science University, Portland, OR, USA
| | - A Lomniczi
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR, USA
| | - T Chatkupt
- Department of Comparative Medicine, Oregon Health and Science University, Portland, OR, USA
| | - B L Davidson
- Raymond G. Perelman Center for Cellular and Molecular Therapeutics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - H Nakai
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR, USA.,Department of Molecular and Medical Genetics, Oregon Health and Science University, Portland, OR, USA
| | - S R Ojeda
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR, USA
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8
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Tobiume T, Kotani Y, Takaya H, Nakai H, Tsuji I, Suzuki A, Mandai M. Determinant factors of postoperative recurrence of endometriosis: difference between endometrioma and pain. Eur J Obstet Gynecol Reprod Biol 2016; 205:54-9. [PMID: 27566223 DOI: 10.1016/j.ejogrb.2016.07.516] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 06/21/2016] [Accepted: 07/27/2016] [Indexed: 10/21/2022]
Abstract
OBJECTIVE Although the postoperative use of hormonal treatment for endometriosis is recommended in the European Society of Human Reproduction and Embryology guidelines to prevent the recurrence of endometriosis-associated dysmenorrhoea, hormonal treatment may not be necessary for all patients who undergo surgical treatment for endometriosis. The aim of this study was to clarify the determinant factors that predict the recurrence of endometriosis after surgery in order to develop personalized hormonal treatment recommendations. Factors associated with the recurrence of endometrioma and pain were investigated independently to identify the likelihood of recurrence in each individual patient. STUDY DESIGN Between 2008 and 2013, 352 patients underwent surgery and were diagnosed with endometriosis based on pathological findings at the study hospital. Among these patients, 191 experienced a recurrence of endometrioma in the absence of pre- or postoperative hormonal treatment. Various clinical factors such as pre-operative pain, intra-operative findings and postoperative improvement of pain were compared between patients who experienced recurrence after surgery and those who did not. RESULTS The cumulative 5-year recurrence rate of endometrioma was 28.7% among the 191 patients who did not undergo pre- or postoperative hormonal treatment. Significant differences were detected in maximum tumour diameter, revised American Society for Reproductive Medicine score (r-ASRM score), operative time and operative blood loss between patients in the recurrent endometrioma group and the non-recurrent endometrioma group; only the r-ASRM score was significantly correlated with recurrence of endometrioma in the multivariate analysis. The cumulative 5-year rate of persistent/recurrent pain was 33.4%. There were significant differences in the postoperative improvement of pain between the persistent/recurrent pain group and the non-recurrent pain group according to the univariate and multivariate analyses. CONCLUSION This study suggests that the risk factors for recurrence of endometrioma differ from the risk factors for recurrence of pain. The use of postoperative hormonal treatment should be considered based on the dominant risk factors and needs of each patient.
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Affiliation(s)
- T Tobiume
- Department of Obstetrics and Gynaecology, Kinki University Faculty of Medicine, Osaka, Japan.
| | - Y Kotani
- Department of Obstetrics and Gynaecology, Kinki University Faculty of Medicine, Osaka, Japan
| | - H Takaya
- Department of Obstetrics and Gynaecology, Kinki University Faculty of Medicine, Osaka, Japan
| | - H Nakai
- Department of Obstetrics and Gynaecology, Kinki University Faculty of Medicine, Osaka, Japan
| | - I Tsuji
- Department of Obstetrics and Gynaecology, Kinki University Faculty of Medicine, Osaka, Japan
| | - A Suzuki
- Department of Obstetrics and Gynaecology, Kinki University Faculty of Medicine, Osaka, Japan
| | - M Mandai
- Department of Obstetrics and Gynaecology, Kinki University Faculty of Medicine, Osaka, Japan.
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9
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Nishi H, Izumoto S, Nakamura K, Nakai H, Sato T. Dextran and dextrin as chiral selectors in capillary zone electrophoresis. Chromatographia 2016. [DOI: 10.1007/bf02267693] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Affiliation(s)
- N Rajan
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, NE1 3BZ, U.K.
| | - N Sinclair
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, NE1 3BZ, U.K
| | - H Nakai
- Graduate School of Science and Technology, Niigata University, Niigata, Japan
| | - Y Shimomura
- Laboratory of Genetic Skin Diseases, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - S Natarajan
- The James Cook University Hospital, Middlesbrough, TS4 3BW, U.K
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11
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Goto M, Okawa-Takatsuji M, Aotsuka S, Nakai H, Shimizu M, Goto H, Shimamoto A, Furuichi Y. Significant elevation of IgG anti-WRN (RecQ3 RNA/DNA helicase) antibody in systemic sclerosis. Mod Rheumatol 2014. [DOI: 10.3109/s10165-006-0496-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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12
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Ogo S, Ichikawa K, Kishima T, Matsumoto T, Nakai H, Kusaka K, Ohhara T. A Functional [NiFe]Hydrogenase Mimic That Catalyzes Electron and Hydride Transfer from H2. Science 2013; 339:682-4. [DOI: 10.1126/science.1231345] [Citation(s) in RCA: 210] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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13
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Matsunaga T, Chikuni K, Tanabe R, Muroya S, Nakai H, Shibata K, Yamada J, Shinmura Y. Determination of mitochondrial cytochrome B gene sequence for red deer (Cervus elaphus) and the differentiation of closely related deer meats. Meat Sci 2012; 49:379-85. [PMID: 22060620 DOI: 10.1016/s0309-1740(97)00145-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/1997] [Revised: 10/28/1997] [Accepted: 12/19/1997] [Indexed: 10/18/2022]
Abstract
The cytochrome b gene sequence for red deer was determined using the Dye Terminator Cycle Sequencing method and used for identification of deer meat in meat and meat products. Red deer showed a similarity of 94.1, 84.0, 81.1, 85.5 and 85.6% to sika deer (Cervus nippon), bovine, pigs, sheep and goats, respectively. To differentiate the deer meat, oligonucleotide primers RD-1(5'-TCATCGCAGCACTCGCTATAGTACACT-3'), RD-2(5'-ATCTCCAAGTAGGTCTGGTGCGAATAA-3') were designed for the region of the cytochrome b gene of red deer. The PCR amplified 194 bp fragments from red and sika deer, but no fragments from bovine, pig, chicken, sheep, goat, horse and rabbit DNA. Although cooking the meats reduced the PCR products, red deer could still be detected in meat heated at 120 °C. To discriminate between red and sika deer, these PCR products were digested by a restriction enzyme (EcoRI,BamHI,ScaI) and analyzed by 4% agorose gel electrophoresis. As a result, the red deer fragment was digested by EcoRI to 67/127 bp fragments but not by BamHI and ScaI. The sika deer fragment was digested to 48/146 bp and 49/145 bp fragments with the two other enzymes, and thus it is possible to differentiate between the two kinds of deer from the digestion pattern of restriction enzymes.
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Affiliation(s)
- T Matsunaga
- Japan Meat Processors Association, Ebisu 1-5-6 Shibuya-ku, Tokyo 150, Japan
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14
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Sugata K, Taniguchi K, Yui A, Nakai H, Asano Y, Hashimoto S, Ihira M, Yagasaki H, Takahashi Y, Kojima S, Matsumoto K, Kato K, Yoshikawa T. Analysis of rotavirus antigenemia in hematopoietic stem cell transplant recipients. Transpl Infect Dis 2011; 14:49-56. [DOI: 10.1111/j.1399-3062.2011.00668.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Revised: 06/15/2011] [Accepted: 06/28/2011] [Indexed: 01/06/2023]
Affiliation(s)
- K. Sugata
- Department of Pediatrics; Fujita Health University School of Medicine; Toyoake; Aichi; Japan
| | - K. Taniguchi
- Department of Virology and Parasitology; Fujita Health University School of Medicine; Toyoake; Aichi; Japan
| | - A. Yui
- Department of Virology and Parasitology; Fujita Health University School of Medicine; Toyoake; Aichi; Japan
| | - H. Nakai
- Department of Pediatrics; Fujita Health University School of Medicine; Toyoake; Aichi; Japan
| | - Y. Asano
- Department of Pediatrics; Fujita Health University School of Medicine; Toyoake; Aichi; Japan
| | - S. Hashimoto
- Department of Hygiene; Fujita Health University School of Medicine; Toyoake; Aichi; Japan
| | - M. Ihira
- Faculty of Clinical Engineering; Fujita Health University School of Health Sciences; Toyoake; Aichi; Japan
| | - H. Yagasaki
- Department of Pediatrics; Nagoya University Graduate School of Medicine; Nagoya; Japan
| | - Y. Takahashi
- Department of Pediatrics; Nagoya University Graduate School of Medicine; Nagoya; Japan
| | - S. Kojima
- Department of Pediatrics; Nagoya University Graduate School of Medicine; Nagoya; Japan
| | - K. Matsumoto
- Division of Hematology-Oncology; Children's Medical Center; the Japanese Red Cross Nagoya First Hospital; Nagoya; Japan
| | - K. Kato
- Division of Hematology-Oncology; Children's Medical Center; the Japanese Red Cross Nagoya First Hospital; Nagoya; Japan
| | - T. Yoshikawa
- Department of Pediatrics; Fujita Health University School of Medicine; Toyoake; Aichi; Japan
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15
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Oerum S, Ernst HA, Larsen S, Nakai H, Nakai N, Hachem MA, Svensson B, Poulsen JCN, Leggio LL. Structural studies of GH31 and GH32 glycoside hydrolases. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311094517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Eghtesad S, Zheng H, Nakai H, Epperly MW, Clemens PR. Effects of irradiating adult mdx mice before full-length dystrophin cDNA transfer on host anti-dystrophin immunity. Gene Ther 2011; 17:1181-90. [PMID: 20827278 PMCID: PMC3050623 DOI: 10.1038/gt.2010.108] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- S Eghtesad
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA 15213, USA
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Abstract
We isolated a highly transformable thermophile, Bacillus stearothermophilus SIC1, which exhibited the following features. The growth temperature ranged from 45 to 65 degrees C in L broth. The maximum cell concentration in 2L broth (2% tryptone, 1% yeast extract, 0.5% NaCl, pH 7.2) was determined as an optical density at 660 nm of 7.8, and the generation time was 11 min at 60 degrees C. Strain SIC1 was a prototroph and was transformed by the protoplast procedure not only with repB plasmids (high-copy-number plasmids such as pTB913 and pUB110) but also with repA plasmids (low-copy-number plasmids such as pTB53). Transformation efficiencies with repB and repA plasmids were about 2 x 10 to 5 x 10 and 5 x 10 transformants per mug of DNA, respectively. The transformant carrying plasmid pTB913Y/K could grow at 63 degrees C in the presence of kanamycin. The regeneration frequency of protoplasts was 60%, and only 1 day was needed for regeneration at 55 degrees C.
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Affiliation(s)
- M Zhang
- Department of Fermentation Technology, Faculty of Engineering, Osaka University, Yamadaoka, Suita-shi, Osaka 565, Japan
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Nishikage T, Takeuchi M, Nakai H, Otsuji Y, Lang RM. Possible link between strain ST-T change on the electrocardiogram and subendocardial dysfunction assessed by two-dimensional speckle-tracking echocardiography. European Journal of Echocardiography 2010; 11:451-9. [DOI: 10.1093/ejechocard/jeq001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Haruki N, Takeuchi M, Kanazawa Y, Tsubota N, Shintome R, Nakai H, Lang RM, Otsuji Y. Continuous positive airway pressure ameliorates sleep-induced subclinical left ventricular systolic dysfunction: demonstration by two-dimensional speckle-tracking echocardiography. European Journal of Echocardiography 2010; 11:352-8. [DOI: 10.1093/ejechocard/jep215] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Nakai H, Takeuchi M, Nishikage T, Lang RM, Otsuji Y. Subclinical left ventricular dysfunction in asymptomatic diabetic patients assessed by two-dimensional speckle tracking echocardiography: correlation with diabetic duration. European Journal of Echocardiography 2009; 10:926-32. [DOI: 10.1093/ejechocard/jep097] [Citation(s) in RCA: 175] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Haruki N, Takeuchi M, Nakai H, Kanazawa Y, Tsubota N, Shintome R, Lang RM, Otsuji Y. Overnight sleeping induced daily repetitive left ventricular systolic and diastolic dysfunction in obstructive sleep apnoea: quantitative assessment using tissue Doppler imaging. European Journal of Echocardiography 2009; 10:769-75. [DOI: 10.1093/ejechocard/jep068] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Nishikage T, Nakai H, Mor-Avi V, Lang RM, Salgo IS, Settlemier SH, Husson S, Takeuchi M. Quantitative assessment of left ventricular volume and ejection fraction using two-dimensional speckle tracking echocardiography. European Journal of Echocardiography 2009; 10:82-8. [DOI: 10.1093/ejechocard/jen166] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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23
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Nakai H, Hatake M, Isobe K. Crystalline-state photochromism of a dithionite complex in chiral crystal. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308086418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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24
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Toriumi K, Hashimoto S, Kanamono H, Ozawa Y, Mitsumi M, Nakai H, Miyano Y, Hayashi Y, Isobe K. Photo-induced isomerization reaction and phase transition of an organo-dirhodium dithionite complex. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308086571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kawamata O, Kondu Y, Murata T, Uetsuka H, Uda M, Nakai H, Ohta T. [Malignant pleural mesothelioma]. Kyobu Geka 2007; 60:31-4. [PMID: 17249535] [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: 05/13/2023]
Abstract
Malignant pleural mesothelioma carries a poor prognosis, for which no standard therapy has been established. We report 15 cases of malignant pleural mesothelioma experienced since 2000 focusing on their clinical features. They included 14 male and 1 female aged 38 to 81 (62.8 on average) years. All patients were diagnosed by pleural biopsy under thoracoscopic guidance. Histology of the pleural biopsy specimen showed epithelial mesothelioma in 8 patients, biphasic mesothelioma in 3, sarcomatous mesothelioma in 2 and desmoplastic malignant mesothelioma (DMM) in 2. Twelve patients received chemotherapy. Of these, 3 were followed by surgery. In addition to 2 of these 3 patients, 2 underwent extrapleural pneumonectomy (EPP) without adjuvant treatment. Remaining 1 received palliative treatment only. As a result, 6 patients are surviving, 7 died of primary diseases and 2 died of other diseases. The longest survival time with chemotherapy is 41 months in a surviving patient with epithelial mesothelioma and that with EPP is 25 months in a surviving patient with DMM. The 2-year survival rate of the 14 patients was 44.4% and the median survival time in patients with epithelial mesothelioma was 30.6 months.
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Affiliation(s)
- O Kawamata
- Department of Surgery, Onomichi Municipal Hospital, Onomichi, Japan
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Goto M, Okawa-Takatsuji M, Aotsuka S, Nakai H, Shimizu M, Goto H, Shimamoto A, Furuichi Y. Significant elevation of IgG anti-WRN (RecQ3 RNA/DNA helicase) antibody in systemic sclerosis. Mod Rheumatol 2006; 16:229-34. [PMID: 16906373 DOI: 10.1007/s10165-006-0496-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2006] [Accepted: 05/22/2006] [Indexed: 11/24/2022]
Abstract
Werner syndrome, caused by the homologous mutation of RecQ3 RNA/DNA helicase (WRN), is often misdiagnosed as systemic sclerosis (SSc) because of apparent similar skin changes and its relatively high frequency in Japan. The present study was undertaken to determine whether anti-WRN antibodies assayed by specific enzyme-linked immunosorbent assay occur in 41 SSc patients (30 diffuse and 11 limited types) and, if so, to determine any clinical association, such as skin sclerosis. Serum level of IgG anti-WRN antibody in SSc was significantly higher than that from 30 age- and sex-matched normal volunteers (P < 0.001). The serum level of IgG anti-WRN antibody in diffuse type SSc was significantly higher than the limited type (P < 0.05). A significant correlation was observed between serum levels of IgG anti-topoisomerase I antibody and IgG anti-WRN antibody in the same samples from SSc (P < 0.05). Moreover, in 119 normal healthy individuals aged from 0 to 99 years, a statistically significant correlation (P < 0.001) existed between serum level of IgG anti-WRN antibody and advancing age. A significantly higher level of IgG autoantibody specific for WRN detected in diffuse than in limited type SSc and normal may contribute to the pathogenesis of skin sclerosis in SSc.
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Affiliation(s)
- Makoto Goto
- Division of Anti-Ageing and Longevity Sciences, Department of Clinical Engineering, Faculty of BioMedical Engineering, Toin University of Yokohama, 1614 Kurogane-cho, Aoba-ku, Yokohama, 225-8502, Japan.
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Manno CS, Arruda VR, Pierce GF, Glader B, Ragni M, Rasko J, Ozelo MC, Hoots K, Blatt P, Konkle B, Dake M, Kaye R, Razavi M, Zajko A, Zehnder J, Nakai H, Chew A, Leonard D, Wright JF, Lessard RR, Sommer JM, Tigges M, Sabatino D, Luk A, Jiang H, Mingozzi F, Couto L, Ertl HC, High KA, Kay MA. Erratum: CORRIGENDUM: Successful transduction of liver in hemophilia by AAV-Factor IX and limitations imposed by the host immune response. Nat Med 2006. [DOI: 10.1038/nm0506-592b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Kitahara S, Iwatsubo E, Yasuda K, Ushiyama T, Nakai H, Suzuki T, Yamashita T, Sato R, Kihara T, Yamanishi T, Nohara Y. Practice patterns of Japanese physicians in urologic surveillance and management of spinal cord injury patients. Spinal Cord 2005; 44:362-8. [PMID: 16331312 DOI: 10.1038/sj.sc.3101854] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [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: 11/10/2022]
Abstract
STUDY DESIGN Analysis of answers to a new questionnaire. OBJECTIVE To examine current practice patterns of physicians in the urological surveillance and management of spinal cord injury (SCI) patients in Japan. SETTING Nationwide questionnaire survey to physicians in Japan. METHODS A Japanese version of the 14-item questionnaire survey carried out in US was mailed to 770 members of the Japanese Neurogenic Bladder Society (JNBS). RESULTS We received answers to our questionnaire from 333 (43.2%) members of JNBS. The responders were all urologists. For surveillance of the upper urinary tract (UUT), 239 (71.8%) respondents preferred abdominal ultrasound. Cystometry was performed routinely by 174 (52.3%) respondents for the evaluation of vesicourethral function. Cystoscopy was carried out in cases of hematuria (88.0%) and bladder stone (55.3%). Surveillance of the urinary tract was performed every year in 154 (46.2%). For detection of bladder cancer, which 119 (37.9%) respondents have experienced, 94.9% physicians perform cystoscopy, 76.3% urinary cytology, and 60.4% ultrasound. For initial treatment of detrusor-sphincter dyssynergia (DSD), 225 (69.2%) respondents chose alpha-blocker, and 94 (28.9%) chose clean intermittent catheterization (CIC) with/without anticholinergic agent(s). For initial treatment of overactive bladder, 245 (74.7%) chose anticholinergic agent(s) only and 63 (19.2%) chose anticholinergic agent(s) with CIC. For initial treatment of areflexic bladder, 233 (73.7%) chose CIC and 63 (19.9%) chose Credé maneuver or tapping. CONCLUSIONS This survey shows that there are some differences in urological surveillance and management of SCI patients between Japan and the US. Reasons for the discrepancy should be examined.
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Affiliation(s)
- S Kitahara
- Department of Urology, Koshigaya Hospital, Dokkyo University School of Medicine, Koshigata, Japan
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Shimada T, Sakata K, Homma T, Nakai H, Osaka T. Density functional theory study on the oxidation mechanisms of aldehydes as reductants for electroless Cu deposition process. Electrochim Acta 2005. [DOI: 10.1016/j.electacta.2005.04.051] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Watanabe Y, Nakai H, Ueda H, Nozaki K, Hoshiai H. Carboplatin hypersensitivity induced by low-dose paclitaxel/carboplatin in multiple platinum-treated patients with recurrent ovarian cancer. Int J Gynecol Cancer 2005; 15:224-7. [PMID: 15823103 DOI: 10.1111/j.1525-1438.2005.15207.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [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] Open
Abstract
We report five cases of carboplatin (CBDCA) hypersensitivity after weekly low-dose paclitaxel (60 mg/m2)/CBDCA (area under the concentration curve = 2) therapy in patients with recurrent ovarian cancer receiving multiple platinum-based chemotherapy. Paclitaxel and CBDCA therapy was indicated as second-line chemotherapy in one patient and as third line in four patients with recurrent disease. The range of previously administered total CBDCA was 2582-9589 mg, and the CBDCA area under the concentration curve of the first treatment exhibited appropriate intensity (mean, 1.92 +/- 0.10; range, 1.76-2.10) in all patients. However, one patient exhibited severe hypersensitivity reactions including cardiac arrest and apnea, and another four patients developed eruptions, hypotension, and tachycardia soon after administration of CBDCA. Our report suggested that CBDCA hypersensitivity was correlated with the total dose of previously administered platinum agents and that CBDCA should be excluded in patients who have received multiple platinum-based chemotherapy, even in platinum-sensitive cases, because CBDCA hypersensitivity can occur even with low-dose CBDCA administration.
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Affiliation(s)
- Y Watanabe
- Department of Obstetrics and Gynecology, Kinki University School of Medicine, Osakasayama, Osaka, Japan.
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Watanabe Y, Nakai H, Ueda H, Nozaki K, Hoshiai H. Carboplatin hypersensitivity induced by low-dose paclitaxel/carboplatin in multiple platinum-treated patients with recurrent ovarian cancer. Int J Gynecol Cancer 2005. [DOI: 10.1136/ijgc-00009577-200503000-00006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
We report five cases of carboplatin (CBDCA) hypersensitivity after weekly low-dose paclitaxel (60 mg/m2)/CBDCA (area under the concentration curve = 2) therapy in patients with recurrent ovarian cancer receiving multiple platinum-based chemotherapy. Paclitaxel and CBDCA therapy was indicated as second-line chemotherapy in one patient and as third line in four patients with recurrent disease. The range of previously administered total CBDCA was 2582–9589 mg, and the CBDCA area under the concentration curve of the first treatment exhibited appropriate intensity (mean, 1.92 ± 0.10; range, 1.76–2.10) in all patients. However, one patient exhibited severe hypersensitivity reactions including cardiac arrest and apnea, and another four patients developed eruptions, hypotension, and tachycardia soon after administration of CBDCA. Our report suggested that CBDCA hypersensitivity was correlated with the total dose of previously administered platinum agents and that CBDCA should be excluded in patients who have received multiple platinum-based chemotherapy, even in platinum-sensitive cases, because CBDCA hypersensitivity can occur even with low-dose CBDCA administration.
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Nakata A, Baba T, Takahashi H, Nakai H. Theoretical study on the excited states of psoralen compounds bonded to a thymine residue. J Comput Chem 2004. [DOI: 10.1002/jcc.20009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Nakai H, Yamauchi Y, Nakata A, Baba T, Takahashi H. Ab initio molecular dynamics study on the excitation dynamics of psoralen compounds. J Chem Phys 2003. [DOI: 10.1063/1.1592792] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Takahashi T, Aoki M, Tateyama M, Kondo E, Mizuno T, Onodera Y, Takano R, Kawai H, Kamakura K, Mochizuki H, Shizuka-Ikeda M, Nakagawa M, Yoshida Y, Akanuma J, Hoshino K, Saito H, Nishizawa M, Kato S, Saito K, Miyachi T, Yamashita H, Kawai M, Matsumura T, Kuzuhara S, Ibi T, Sahashi K, Nakai H, Kohnosu T, Nonaka I, Arahata K, Brown RH, Saito H, Itoyama Y. Dysferlin mutations in Japanese Miyoshi myopathy: relationship to phenotype. Neurology 2003; 60:1799-804. [PMID: 12796534 DOI: 10.1212/01.wnl.0000068333.43005.12] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.9] [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
OBJECTIVE To study dysferlin gene mutations and genotype-phenotype correlations in Japanese patients with Miyoshi myopathy (MM). BACKGROUND MM is an autosomal recessive distal muscular dystrophy that arises from mutations in the dysferlin gene. This gene is also mutated in families with limb girdle muscular dystrophy 2B. METHODS The authors examined 25 Japanese patients with MM. Genomic DNA was extracted from the peripheral lymphocytes of the patients. The PCR products of each of 55 exons were screened by single strand conformation polymorphism or direct sequencing from the PCR fragments. RESULTS The authors identified 16 different mutations in 20 patients with MM; 10 were novel. Mutations in Japanese patients are distributed along the entire length of the gene. CONCLUSIONS Four mutations (C1939G, G3370T, 3746delG, and 4870delT) are relatively more prevalent in this population, accounting for 60% of the mutations in this study. This study revealed that the G3370T mutation was associated with milder forms of MM and the G3510A mutation was associated with a more severe form.
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Affiliation(s)
- T Takahashi
- Department of Neurology, Tohoku University School of Medicine, Sendai, Japan
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Abstract
Time-dependent density functional theory calculations have been performed for the excited states of psoralen, 5-methoxypsoralen, and 8-methoxypsoralen in systems and furan and pyrone monoadducts bonded to a thymine residue. The theoretical assignments to ultraviolet (UV) absorption spectra of isolated systems have been performed. The present calculations have clarified that the excitation energies of the first singlet excited (S1) state of monoadducts are blue-shifted compared with the isolated systems. It is shown that, in particular, the S1 excitation energy of the pyrone monoadduct is significantly blue-shifted and, therefore, the pyrone monoadduct is not excited by UV-A light (300-400 nm), which is used in the photochemotherapy.
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Affiliation(s)
- A Nakata
- Department of Chemistry, School of Science and Engineering, Waseda University, Tokyo 169-8555, Japan
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Tanaka T, Hashizume K, Sawamura A, Yoshida K, Tsuda H, Hodozuka A, Nakai H. Basic science and epilepsy: experimental epilepsy surgery. Stereotact Funct Neurosurg 2002; 77:239-44. [PMID: 12378083 DOI: 10.1159/000064621] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [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: 11/19/2022]
Abstract
Epilepsy surgery, as is employed for the management of intractable seizures, was performed in animals harboring a seizure focus induced by a local application of kainic acid (KA). Amygdalo-hippocampectomy failed to stop spontaneous seizures in the contralateral hippocampus. Callosotomy inhibited seizure propagation to the contralateral sensori-motor cortex. However, epileptic activity ipsilateral to the focus, including subcortical structures, persisted even after the callosotomy. Multiple subpial transection (MST) around the epileptic cortical focus suppressed the seizure activity of the cortex. However, seizure propagations in subcortical structures remained, even after MST. Nefiracetam (a new nootropic agent) was tested in these models, and its promising effect on the intractable extratemporal epilepsy is reported.
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Affiliation(s)
- T Tanaka
- Department of Neurosurgery, Asahikawa Medical College, Asahikawa, Japan.
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Abstract
We report the effect of low-dose mitomycin C, etoposide, and cisplatin (low-dose MEP) therapy for three patients with invasive vulvar Paget's disease (invasive VPD) who declined radical vulvectomy and skin grafting. One patient achieved a complete response, while the other two showed partial responses (PR) without grade 3 or 4 adverse effects. The two patients with PR were undergone partial vulvectomy and inguinal lymph node dissection. All patients have no sign of recurrence for 10 months after chemotherapy. Our present results suggest that low-dose MEP is an effective and safe chemotherapy for invasive VPD and low-dose MEP may significantly improve postoperative quality of life in patients with invasive VPD by avoiding extensive vulvar resection and skin grafting.
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Affiliation(s)
- Yoh Watanabe
- Department of Obstetrics and Gynecology, Kinki University School of Medicine, 377-2 Ohno-Higashi, Osakasayama, Osaka 589-8511, Japan.
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Sato Y, Nakai H, Mizoguchi T, Hatanaka Y, Kanaoka Y. Photochemistry of the phthalimide system. VII. Regioselective remote photocyclization. Examples of a photochemical macrocyclic synthesis with sulfide-containing phthalimides. J Am Chem Soc 2002. [DOI: 10.1021/ja00424a066] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Watanabe Y, Hoshiai H, Ueda H, Nakai H, Obata K, Noda K. Low-dose mitomycin C, etoposide, and cisplatin for invasive vulvar Paget's disease. Int J Gynecol Cancer 2002. [DOI: 10.1136/ijgc-00009577-200205000-00011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Abstract.Watanabe Y, Hoshiai H, Ueda H, Nakai H, Obata K, Noda K. Low-dose mitomycin C, etoposide, and cisplatin for invasive Paget's disease.We report the effect of low-dose mitomycin C, etoposide, and cisplatin (low-dose MEP) therapy for three patients with invasive vulvar Paget's disease (invasive VPD) who declined radical vulvectomy and skin grafting. One patient achieved a complete response, while the other two showed partial responses (PR) without grade 3 or 4 adverse effects. The two patients with PR were undergone partial vulvectomy and inguinal lymph node dissection. All patients have no sign of recurrence for 10 months after chemotherapy. Our present results suggest that low-dose MEP is an effective and safe chemotherapy for invasive VPD and low-dose MEP may significantly improve postoperative quality of life in patients with invasive VPD by avoiding extensive vulvar resection and skin grafting.
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Abstract
We evaluated mandibular rehabilitation using vascularized bone graft and osseointegrated implants. Questionnaires were used to evaluate the masticatory function, and we measured the occlusal force in each patient. In addition, we measured the height of grafted bone to assess the possible relationship between masticatory rehabilitation and the change in bony height. Five of 13 patients showed over 12.0% increase in bony height after superstructure fabrication. Most of the patients who underwent tongue resection scored low points on the questionnaire. Also, most patients with resection, including resection of the angles of the mandible, showed a lower occlusal force than those without.
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Affiliation(s)
- H Nakai
- Department of Oral and Maxillofacial Surgery, Nagoya University Postgraduate School of Medicine, Japan
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Minagawa K, Kouzuki S, Nomura K, Kawamura Y, Tani H, Terui Y, Nakai H, Kamigauchi T. Bisabosquals, novel squalene synthase inhibitors. II. Physico-chemical properties and structure elucidation. J Antibiot (Tokyo) 2001; 54:896-903. [PMID: 11827031 DOI: 10.7164/antibiotics.54.896] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [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: 11/21/2022]
Abstract
The squalene synthase inhibitor bisabosqual A was isolated from the culture broth of Stachybotrys sp. RF-7260, and its structure was determined on the basis of spectroscopic methods including detailed 2D NMR analyses. The structures of bisabosquals B, C and D isolated from Stachybotrys ruwenzoriensis RF-6853 were determined by spectroscopic methods and chemical reactions. The absolute stereochemistry of bisabosquals A, B and D was determined by X-ray crystallographic analysis. They have novel cis-fused tetracyclic structures with a bisabolane-type sesquiterpene and phenol moieties.
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Affiliation(s)
- K Minagawa
- Shionogi Research Laboratories, Shionogi & Co., Ltd., Osaka, Japan.
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Abstract
Escherichia coli PriA is a primosome assembly protein with 3' to 5' helicase activity whose apparent function is to promote resumption of DNA synthesis following replication-fork arrest. Here, we describe how initiation of helicase activity on DNA forks is influenced by both fork structure and by single-strand DNA-binding protein. PriA could recognize and unwind forked substrates where one or both arms were primarily duplex, and PriA required a small (two bases or larger) single-stranded gap at the fork in order to initiate unwinding. The helicase was most active on substrates with a duplex lagging-strand arm and a single-stranded leading-strand arm. On this substrate, PriA was capable of translocating on either the leading or lagging strands to unwind the duplex ahead of the fork or the lagging-strand duplex, respectively. Fork-specific binding apparently orients the helicase domain to unwind the lagging-strand duplex. Binding of single-strand-binding protein to forked templates could inhibit unwinding of the duplex ahead of the fork but not unwinding of the lagging-strand duplex or translocation on the lagging-strand template. While single-strand-binding protein could inhibit binding of PriA to the minimal, unforked DNA substrates, it could not inhibit PriA binding to forked substrates. In the cell, single-strand-binding protein and fork structure may direct PriA helicase to translocate along the lagging-strand template of forked structures such that the primosome is specifically assembled on that DNA strand.
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Affiliation(s)
- J M Jones
- Department of Biochemistry and Molecular Biology, Georgetown University Medical Center, 3900 Reservoir Road NW, Washington, DC 20007, USA
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44
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Abstract
BACKGROUND Due to a severe shortage of suitable cadaveric allografts for children awaiting kidney transplants, we have performed a series of ABO-incompatible living kidney transplantations (LKT) at our institution. METHODS Between July 1989 and March 2000, 16 pediatric patients (3 female, 13 male) underwent ABO-incompatible LKT. The mean age at transplantation was 10.9+/-4.3 years (range 5.1-15.0 years). The donor to recipient ABO blood antigen incompatibility was as follows: A1-->O, 5 patients; B-->O, 6 patients; A1B-->B, 2 patients; and A1B -->B, A1-->B, or B-->A1, 1 patient each. The median pretransplantation anti-A1 titers of eight A-incompatible recipients were 1:128 (IgM, range 1:16 to 1:512) and 1:32 (IgG, range 1:2 to 1:128). Median anti-B titers of seven B-incompatible recipients were 1:32 (IgM, range 1:4 to 1:128) and 1:8 (IgG, range 1:2 to 1:64). All patients received three or four sessions of plasmapheresis (PP) and/or immunoadsorption (IA) to remove the anti-A and/or anti-B antibodies before transplantation. Immunosuppression initially consisted of cyclosporine, methylprednisolone, cyclophosphamide, and antilymphocyte globulin. Splenectomy was performed on all recipients at the time of transplantation. RESULTS The patients were followed for 6 to 122 months with a mean follow-up of 63 months. All 16 recipients who underwent ABO-incompatible LKT achieved a pretransplant isoagglutinin titer less than 1:8 with 3-4 sessions of PP/IA treatment. Of 16 patients, 10 patients had rebound increase in their IgM and/or IgG anti-A/B titers to greater than 1:64 or predepletion levels within 10 days posttransplantation. In addition, nine patients developed renal dysfunction in association with the rebound increase in their anti-A/B. One patient lost his graft because of uncontrolled delayed hyperacute rejection, whereas eight other recipients recovered completely with pulse steroids and PP/IA therapy. After the third week posttransplant, there was no correlation between the occurrence of AR and their isoagglutinin titers. Moreover, no antibody-mediated rejection was observed, even in recipients with continued high titer anti-A and/or anti-B antibodies. Patient survival is 100% to date. The actuarial 1-year and 5-year graft survival rates are 87% and 85%, respectively. No fatal infectious complications occurred despite the combination of splenectomy and immunosuppressive drugs. CONCLUSIONS We have demonstrated that with adequate pre- and posttransplant management, successful kidney transplantation across the ABO barrier is possible in the pediatric population. "Accommodation" of the allografts occurred within 2 weeks of transplantation. Subsequently, the long-term graft outcome of ABO-incompatible LKT was comparable to that of ABO-compatible LKT.
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Affiliation(s)
- S Shishido
- Department of Urology, Fujita Health University School of Medicine, Toyoaka, Japan
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45
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Abstract
The repressor of bacteriophage Mu functions in the establishment and maintenance of lysogeny by binding to Mu operator DNA to shut down transposition. A domain at its N terminus functions in DNA binding, and temperature-sensitive mutations in this domain can be suppressed by truncations at the C terminus. To understand the role of the C-terminal tail in DNA binding, a fluorescent probe was attached to the C terminus to examine its environment and its movement with respect to the DNA binding domain. The emission spectrum of this probe indicated that the C terminus was in a relatively hydrophobic environment, comparable to the environment of the probe attached within the DNA-binding domain. Fluorescence of two tryptophan residues located within the DNA-binding domain was quenched by the probe attached to the C terminus, indicating that the C terminus is in close proximity to this domain. Addition of DNA, even when it did not contain operator DNA, reduced quenching of tryptophan fluorescence, indicating that the tail moves away from the DNA-binding domain as it interacts with DNA. The presence of the tail also produced a trypsin hypersensitive site within the DNA-binding domain; mutant repressors with an altered or truncated C terminus were relatively resistant to cleavage at this site. Interaction of the wild-type repressor with DNA greatly reduced cleavage at the site. A repressor with a temperature-sensitive mutation in the DNA-binding domain was especially sensitive to cleavage by trypsin even in the presence of DNA, and the C-terminal tail failed to move in the presence of DNA at elevated temperatures. These results indicate that the tail sterically inhibits DNA binding and that it moves during establishment of repression. Such conformational changes are likely to be involved in communication between repressor protomers for cooperative DNA binding.
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Affiliation(s)
- S S Rai
- Department of Biochemistry and Molecular Biology, Georgetown University Medical Center, Room 331 Basic Science Building, 3900 Reservoir Road NW, Washington, DC 20007, USA
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46
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Tsukimi Y, Nakai H, Itoh S, Amagase K, Okabe S. Involvement of heat shock proteins in the healing of acetic acid-induced gastric ulcers in rats. J Physiol Pharmacol 2001; 52:391-406. [PMID: 11596858] [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: 02/21/2023]
Abstract
The present study examined the expression of 73-kDa of heat shock cognate protein (HSC70), 72-kDa of heat shock protein (HSP70) and 47-kDa of HSP (HSP47) observed in the ulcer healing process in rats. Gastric ulcers were induced by a luminal application of acetic acid in male Donryu rats. During the ulcer healing process, the expression of HSPs in the ulcerated tissue was determined. A high level of HSC70 expression was observed both in the normal mucosa and ulcerated tissue, but the level did not change upon ulceration and ulcer healing. While HSP70 and HSP47 were markedly expressed in the ulcer base during ulceration, and decreased with ulcer healing. HSP70 expression in the ulcer margin was gradually increased with ulcer healing. Omeprazole accelerated the healing of gastric ulcers with strong inhibition of gastric acid secretion, while indomethactin delayed in ulcer healing despite slight inhibition of gastric acid secretion. Omperazole enhanced the expression of HSP70 both in the ulcer margin and base, but it reduced HSP47 expression in the ulcer base Indomethacin markedly enhanced HSP47 expression only in the ulcer base. In conclusion, the expression of HSP70 and HSP47 is changed during ulcer healing. Furthermore, it was suggested that the enhanced expression of HSP70 is involved in acceleration of ulcer healing, but overexpression of HSP47 is involved in delayed ulcer healing.
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Affiliation(s)
- Y Tsukimi
- Department of Applied Pharmacology, Kyoto Pharmaceutical University, Misasagi, Yamashina, Japan
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47
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Abstract
The 23-kDa proteolipid subunit of mouse vacuolar-type proton-translocating ATPase (V-ATPase) was predicted to be a hydrophobic polypeptide of 205 amino acid residues with five putative transmembrane segments. It exhibits sequence similarity to Vma16p of Saccharomyces cerevisiae and vha-4 of Caenorhabdittis elegans (83 and 84%, respectively). Southern blot analysis indicated that the proteolipid is encoded by a single gene, Atp6f, in the mouse genome. Atp6f was mapped to approximately 55 cM on chromosome 4, and its genomic organization is similar to that of the human gene: 8 exons separated by 7 introns, with boundaries matching the GT-AG rule. RNA blotting demonstrated that Atp6f is transcribed as 1.0- and 1.8-kb mRNAs in multiple tissues to varying degrees. The major transcription initiation sites are at -13 and -58 bp upstream of the translation initiation codon. The epitope-tagged 23-kDa protoelipid was localized in endomembrane organelles in CHO cells, as expected for a component of a vacuolar-type proton pump.
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MESH Headings
- Alternative Splicing
- Amino Acid Sequence
- Animals
- Base Sequence
- CHO Cells
- Chromosome Mapping
- Cloning, Molecular
- Cricetinae
- DNA/chemistry
- DNA/genetics
- DNA, Complementary/chemistry
- DNA, Complementary/genetics
- Exons
- Gene Expression
- Genes/genetics
- Introns
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Inbred Strains
- Molecular Sequence Data
- Protein Subunits
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Sequence Alignment
- Sequence Analysis, DNA
- Sequence Homology, Amino Acid
- Sequence Homology, Nucleic Acid
- Tissue Distribution
- Transcription Initiation Site
- Vacuolar Proton-Translocating ATPases/genetics
- Vacuolar Proton-Translocating ATPases/metabolism
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Affiliation(s)
- G H Sun-Wada
- Division of Biological Sciences, Institute of Scientific and Industrial Research, Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
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48
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Maruyama T, Asada M, Shiraishi T, Ishida A, Egashira H, Yoshida H, Maruyama T, Ohuchida S, Nakai H, Kondo K, Toda M. Design and synthesis of a highly selective EP4-receptor agonist. Part 1: 3,7-dithiaPG derivatives with high selectivity. Bioorg Med Chem Lett 2001; 11:2029-31. [PMID: 11454473 DOI: 10.1016/s0960-894x(01)00364-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
A series of 3,7-dithiaPGE(1) analogues 3, 4, 11, 16 and 19 were identified as highly selective EP4-receptor agonists starting from the chemical modification of 7-thiaPGE(1) analogue 1. EP4-receptor selectivity and agonist activity were maximized in 3 and 4.
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Affiliation(s)
- T Maruyama
- Minase Research Institute, Ono Pharmaceutical Co., Ltd., Shimamoto, Mishima, 618-8585, Osaka, Japan.
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49
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Tani K, Naganawa A, Ishida A, Egashira H, Sagawa K, Harada H, Ogawa M, Maruyama T, Ohuchida S, Nakai H, Kondo K, Toda M. Design and synthesis of a highly selective EP2-receptor agonist. Bioorg Med Chem Lett 2001; 11:2025-8. [PMID: 11454472 DOI: 10.1016/s0960-894x(01)00359-6] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
EP2-receptor selective agonist 3 was identified by the structural hybridization of butaprost 1a and PGE(2) 2a. Based on this information, a chemically more stabilized 4 was discovered as another highly selective EP2-receptor agonist, iv administration of which to anesthetized rats suppressed uterine motility, while PGE(2) 2a stimulated uterine motility.
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Affiliation(s)
- K Tani
- Minase Research Institute, Ono Pharmaceutical Co., Ltd., Shimamoto, Mishima, 618-8585, Osaka, Japan.
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50
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Maruyama T, Asada M, Shiraishi T, Sakata K, Seki A, Yoshida H, Shinagawa Y, Maruyama T, Ohuchida S, Nakai H, Kondo K, Toda M. Design and synthesis of a highly selective EP4-receptor agonist. Part 2: 5-thia and 9beta-haloPG derivatives with improved stability. Bioorg Med Chem Lett 2001; 11:2033-5. [PMID: 11454474 DOI: 10.1016/s0960-894x(01)00365-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [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: 11/20/2022]
Abstract
Further chemical modification to identify more chemically stabilized EP4-receptor selective agonists was continued. As a result, a further two EP4-receptor selective agonists 5-thiaPGE(1) 2a, 10 and 9beta-chloroPGF(2) analogue 11 were discovered.
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Affiliation(s)
- T Maruyama
- Minase Research Institute, Ono Pharmaceutical Co., Ltd., Shimamoto, Mishima, 618-8585, Osaka, Japan.
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