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Tachibana M, Matsuki S, Toyama K, Maekawa Y, Fukae M, Shimizu T, Tsutsumi J, Shinohara S, Ishizuka H. Safety, Tolerability, and Pharmacokinetics of Valemetostat Tablets and the Effect of Food on Valemetostat Pharmacokinetics in Healthy Subjects: Two Phase 1 Studies. Clin Pharmacol Drug Dev 2024; 13:77-86. [PMID: 37565616 DOI: 10.1002/cpdd.1315] [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: 05/19/2023] [Accepted: 07/23/2023] [Indexed: 08/12/2023]
Abstract
Valemetostat is an oral, selective inhibitor of enhancer of zeste homolog-2 (EZH2) and EZH1. In a first-in-human phase-1 trial, valemetostat capsules were well tolerated and clinically active in patients with relapsed/refractory non-Hodgkin lymphoma. Subsequently, a film-coated tablet formulation was developed for future clinical trials and commercialization. We report outcomes from 2 phase 1 trials in healthy Japanese participants, assessing the safety, tolerability, and pharmacokinetics (PK) of valemetostat tablets at single ascending doses (50, 100, and 200-mg), the relative bioavailability between capsules and tablets, and the effect of food (high-fat or low-fat meals) on the PK of valemetostat tablets. In the ascending-dose study, valemetostat maximum plasma concentration (Cmax ) and area under the concentration-time curve (AUC) increased dose-proportionally. Valemetostat plasma PK parameters were similar between the capsule and tablet formulations following a single 200-mg dose. Administration of valemetostat, 200 mg after a meal, was associated with 50%-60% lower Cmax , 30%-50% lower AUC, and a median Tmax delay of 2.5-3 hours relative to fasted administration. Valemetostat was well tolerated in healthy subjects; treatment-emergent adverse events were mild (grade 1) in severity. Based on these trials, the tablet formulation of valemetostat is suitable for use in subsequent clinical trials and should be administered under fasted conditions to avoid a negative food effect.
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Affiliation(s)
- Masaya Tachibana
- Quantitative Clinical Pharmacology Department, Daiichi Sankyo Co, Ltd, Tokyo, Japan
| | | | - Kaoru Toyama
- Quantitative Clinical Pharmacology Department, Daiichi Sankyo Co, Ltd, Tokyo, Japan
| | - Yutaro Maekawa
- Quantitative Clinical Pharmacology Department, Daiichi Sankyo Co, Ltd, Tokyo, Japan
| | - Masato Fukae
- Quantitative Clinical Pharmacology Department, Daiichi Sankyo Co, Ltd, Tokyo, Japan
| | - Takako Shimizu
- Quantitative Clinical Pharmacology Department, Daiichi Sankyo Co, Ltd, Tokyo, Japan
| | - Junko Tsutsumi
- Quantitative Clinical Pharmacology Department, Daiichi Sankyo Co, Ltd, Tokyo, Japan
| | - Sayaka Shinohara
- Quantitative Clinical Pharmacology Department, Daiichi Sankyo Co, Ltd, Tokyo, Japan
| | - Hitoshi Ishizuka
- Quantitative Clinical Pharmacology Department, Daiichi Sankyo Co, Ltd, Tokyo, Japan
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Tachibana M, Matsuki S, Maekawa Y, Kuroda K, Shimizu T, Tsutsumi J, Ishizuka H. Effect of itraconazole and fluconazole on the pharmacokinetics of valemetostat: An open-label, phase I study in healthy subjects. Clin Transl Sci 2023; 16:2153-2162. [PMID: 37705321 PMCID: PMC10651645 DOI: 10.1111/cts.13613] [Citation(s) in RCA: 1] [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] [Received: 05/05/2023] [Revised: 07/27/2023] [Accepted: 08/03/2023] [Indexed: 09/15/2023] Open
Abstract
Valemetostat tosylate (valemetostat) is an oral, potent, dual inhibitor of enhancer of zeste homolog (EZH) 2 and EZH1 under investigation for the treatment of cancer, including non-Hodgkin's lymphomas and solid tumors. Itraconazole and fluconazole are antifungal medications often used as typical inhibitors of cytochrome P450 3A (CYP3A [itraconazole and fluconazole]) and P-glycoprotein (P-gp [itraconazole]) in drug-drug interaction studies. Valemetostat is a substrate of CYP3A and P-gp in vitro. This phase I, open-label, single-sequence crossover study (JapicCTI-183902) assessed the pharmacokinetics (PK) of valemetostat when co-administered with itraconazole (a strong CYP3A inhibitor and P-gp inhibitor) or fluconazole (a moderate CYP3A inhibitor) in healthy Japanese male participants 20-45 years of age. Participants were equally allocated to receive two doses of valemetostat 25 mg, once alone and once with either itraconazole or fluconazole (400-mg induction and 200-mg once daily maintenance). Valemetostat PK parameters with versus without itraconazole or fluconazole were compared using analysis of variance models. Overall, 32 participants were enrolled. Co-administration with itraconazole increased valemetostat peak concentration (Cmax ) by 2.9-fold and area under the plasma concentration-time curve extrapolated to infinity (AUCinf ) by 4.2-fold compared with valemetostat alone. When co-administered with fluconazole, the Cmax and AUCinf of valemetostat were each increased by 1.6-fold. No treatment-related or grade ≥3 adverse events were reported. Appropriate valemetostat dose reductions are warranted when used concomitantly with strong CYP3A and P-gp dual inhibitors.
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Kitazono T, Kamouchi M, Matsumaru Y, Nakamura M, Umemura K, Matsuo H, Koyama N, Tsutsumi J, Kimura K. Efficacy and Safety of Prasugrel vs Clopidogrel in Thrombotic Stroke Patients With Risk Factors for Ischemic Stroke Recurrence: A Double-blind, Phase III Study (PRASTRO-III). J Atheroscler Thromb 2023; 30:222-236. [PMID: 35599000 PMCID: PMC9981351 DOI: 10.5551/jat.63473] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [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] [Indexed: 11/11/2022] Open
Abstract
AIM To examine the efficacy and safety of prasugrel vs clopidogrel in thrombotic stroke patients at risk of ischemic stroke. METHODS This multicenter, active-controlled, randomized, double-blind, double-dummy, parallel group study enrolled thrombotic stroke patients aged ≥ 50 years at risk of ischemic stroke. Patients received prasugrel (3.75 mg/day) or clopidogrel (75 or 50 mg/day) for 24-48 weeks; other antiplatelet drugs were prohibited. The primary efficacy endpoint was the composite incidence of ischemic stroke, myocardial infarction (MI), and death from other vascular causes from the start to 1 day after treatment completion or discontinuation. Secondary efficacy endpoints included the incidences of ischemic stroke, MI, death from other vascular causes, ischemic stroke and transient ischemic attack, and stroke. Safety endpoints included bleeding events and adverse events (AEs). RESULTS In the prasugrel (N=118) and clopidogrel (N=112; all received 75 mg) groups, the primary efficacy endpoint composite incidence (95% confidence interval) was 6.8% (3.0%-12.9%) and 7.1% (3.1%-13.6%), respectively. The risk ratio (prasugrel/clopidogrel) was 0.949 (0.369-2.443). Secondary efficacy endpoints followed a similar trend. The combined incidences of life-threatening, major, and clinically relevant bleeding were 5.0% and 3.5% in the prasugrel and clopidogrel groups, respectively. The incidences of all bleeding events and AEs were 19.2% and 24.6% and 76.7% and 82.5% in the prasugrel and clopidogrel groups, respectively. No serious AEs were causally related to prasugrel. CONCLUSIONS We observed a risk reduction of 5% with prasugrel vs clopidogrel, indicating comparable efficacy. There were no major safety issues for prasugrel.
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Affiliation(s)
- Takanari Kitazono
- Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masahiro Kamouchi
- Department of Health Care Administration and Management, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yuji Matsumaru
- Division of Stroke Prevention and Treatment, Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Masato Nakamura
- Division of Cardiovascular Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
| | - Kazuo Umemura
- Department of Pharmacology, Hamamatsu University School of Medicine, Shizuoka, Japan
| | | | | | | | - Kazumi Kimura
- Department of Neurological Science, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
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Kurata A, Eto T, Tsutsumi J, Igawa Y, Nishikawa Y, Ishizuka H. Bioequivalence of Esaxerenone Conventional Tablet and Orally Disintegrating Tablet: Two Single-Dose Crossover Studies in Healthy Japanese Men. Clin Pharmacol Drug Dev 2022; 11:957-965. [PMID: 35315257 PMCID: PMC9545664 DOI: 10.1002/cpdd.1087] [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: 12/06/2021] [Accepted: 02/07/2022] [Indexed: 11/08/2022]
Abstract
We assessed the bioequivalence of a single dose of 5-mg of esaxerenone administered as an orally disintegrating tablet (ODT) with the conventional oral tablet in healthy Japanese men. This single-center, open-label, randomized, two-drug, two-stage crossover, single-dose study was conducted in two parts. In study 1, both formulations were taken with water. In study 2, only the ODT formulation was taken without water. The primary outcome was the evaluation of bioequivalence of the ODT and conventional tablet using the pharmacokinetic (PK) parameters maximum plasma concentration (Cmax ) and area under the plasma concentration-time curve to the last quantifiable time (AUClast ). Plasma concentrations were measured using a validated liquid chromatography/mass spectrometry method and PK parameters were calculated by noncompartmental analysis. The ratios of the geometric least-squares mean (2-sided 90% confidence intervals [90%CIs]) for ODT with (study 1) and without (study 2) water to the conventional tablet were 1.03 (1.00-1.07) and 1.01 (0.96-1.06) for Cmax and 1.03 (1.00-1.07) and 0.96 (0.94-0.98) for AUClast , respectively. The 90%CIs fell within the predefined bioequivalence range of 0.80-1.25. Treatment-emergent adverse events were similar between both formulations. In conclusion, esaxerenone 5-mg ODT taken with or without water was bioequivalent to a single 5-mg conventional oral tablet.
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Affiliation(s)
- Akifumi Kurata
- Quantitative Clinical Pharmacology Department, Daiichi Sankyo Co., Ltd., Tokyo, Japan
| | | | - Junko Tsutsumi
- Data Intelligence Department, Daiichi Sankyo Co., Ltd., Tokyo, Japan
| | - Yoshiyuki Igawa
- Quantitative Clinical Pharmacology Department, Daiichi Sankyo Co., Ltd., Tokyo, Japan
| | - Yasuhiro Nishikawa
- Development Strategy & Planning Group, Daiichi Sankyo Co., Ltd., Tokyo, Japan
| | - Hitoshi Ishizuka
- Quantitative Clinical Pharmacology Department, Daiichi Sankyo Co., Ltd., Tokyo, Japan
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Shirasaki Y, Tanaka M, Kawanomoto S, Honda S, Ohishi M, Mizumoto Y, Yasuda N, Masunaga Y, Ishihara Y, Tsutsumi J, Nakamoto H, Kobayashi Y, Sakamoto M. Data processing for ‘SUBARU’ telescope using GRID. Fusion Engineering and Design 2008. [DOI: 10.1016/j.fusengdes.2007.09.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Tsutsumi J, Ikata O, Satoh Y. Passband widening of transversely coupled resonator filters using the fundamental symmetric and antisymmetric modes. IEEE Trans Ultrason Ferroelectr Freq Control 2001; 48:1406-1412. [PMID: 11570766 DOI: 10.1109/58.949750] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
This paper describes a method for widening the passband of transversely coupled resonator filters (TCF) using only the fundamental symmetric and antisymmetric modes. The coupling of modes analysis in the transverse direction is applied to the TCF design to investigate the passband width. As a result, it is found that the passband width can be increased by making the surface acoustic wave (SAW) velocity difference between the interdigital transducer (IDT) region and the resonator gap region smaller. It is proposed that a grating structure be applied to the common ground bar, instead of the uniform metal, to reduce the SAW velocity difference. Using the grating-type common ground bar, filters are fabricated on ST-quartz substrate. The passband of a single filter with a center frequency of 248 MHz is widened up to 410 kHz without any increase of the insertion loss. The effect of the impedance mismatch at the junction of two cascaded devices is investigated. It is shown that the filter performance is improved by reduction of the small parasitic capacitance existing at the cascade point. Experimentally, the capacitance formed between the bus bar of the IDT and the bottom surface of the ceramic package is reduced. The insertion loss is reduced by 0.6 dB, and 3-dB passband is widened by 8 kHz for a filter with a center frequency of 248 MHz. On the basis of these two improvements, cascaded TCFs are fabricated. For a filter with a center frequency of 248 MHz, an insertion loss of 5.5 dB and a 3-dB passband width of 270 kHz are obtained.
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Affiliation(s)
- J Tsutsumi
- Fujitsu Laboratories Ltd, Akashi, Japan.
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Abstract
The development of carcinoma in cases of gastric ulcer disease during long-term H(2)-blocker treatment is slowly increasing, and ulcers that require such treatment exhibit the characteristics of intractable conditions, including linear ulcers, simultaneous gastric and duodenal ulcers, immature intestinal metaplasia of the gastric epithelium, and atrophic gastritis accompanied with multiple ulcer cicatrices. The incomplete form of intestinal metaplasia resembling Filipe's type III lesions and showing structural atypia developed in the background gastric mucosa in such cases, and the characteristics of this metaplasia included structural atypia, a residuum of gastric-type mucous cells, rapid proliferative activity, and in some areas abnormal expression of P53 protein. In addition, in rat studies it was demonstrated that prolonged administration of H(2)-blockers while gastric ulcers were present accelerated cell proliferation in the background gastric mucosa in the long term. Accordingly, it was considered possible that the development of the incomplete form of intestinal metaplasia, which was strongly suggested to have some relation to the sites where intestinal-type gastric carcinoma appeared, was accelerated by mucosal injury due to chronic ulcers and by persistent elevation in intragastric pH. The results of the present study of gastric carcinoma as a complication of peptic ulcer disease indicated the possibility that Helicobacter pylori was a major contributory factor to the development of the incomplete form of intestinal metaplasia from damage to the background mucosa, but it was unclear whether H. pylori made any direct contribution to carcinogenesis.
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Affiliation(s)
- T Aoki
- Department of Surgery II, Jikei University School of Medicine, 3-25-8 Nishi Shimbashi, Minato-ku, Tokyo, Japan
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Tsutsumi J, Matsuda T, Ikata O, Satoh Y. A novel reflector-filter using a SAW waveguide directional coupler. IEEE Trans Ultrason Ferroelectr Freq Control 2000; 47:1228-1234. [PMID: 18238664 DOI: 10.1109/58.869069] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The SAW waveguide technique was used to form a novel reflector-filter for the realization of compact IF filters in CDMA handsets. The reflector-filter design is an attractive technique to obtain characteristics with steep skirts in a short device length, because the SAW propagation path is folded and the frequency response is synthesized by utilizing both IDT and reflector responses. In this paper, we propose a new reflector-filter structure using a SAW waveguide directional coupler. For the implementation of the proposed reflector-filter, the key technology is the design of SAW waveguides. We have formed SAW waveguides using Al gratings loaded on the surface of the substrate. The pitch of the Al gratings has been chosen unequal to half the acoustical wavelength to avoid the occurrence of the gratings stopband at the filters passband position. Using the proposed reflector-filter structure, PCS-CDMA IF filters were fabricated on quartz substrates. The filter exhibited an insertion loss of 8.5 dB, a 5 dB bandwidth of 1.45 MHz, and a rejection of more than 33 dB at the center frequency +/-1.25 MHz with the package size of 4.8x9.1 mm (2). i.e., half the size of a conventional transversal filter was achieved using the proposed reflector-filter technique.
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Affiliation(s)
- J Tsutsumi
- Media Dev. Lab., Fujitsu Labs. Ltd., Akashi
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Tsutsumi J, Takayama S, Nimura H. [Biochemical and immunohistological changes in the gastric mucosa of rats with long-term administration of histamine H2-receptor antagonist]. Nihon Shokakibyo Gakkai Zasshi 1998; 95:1333-42. [PMID: 9889541] [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: 02/09/2023]
Abstract
Effects of long term administration of Histamine H2-receptor Antagonist (H2-RA) in the treatment of peptic ulcer was studied for the influence to the risk of causing precancerous changes in gastric mucosa. Serum gastrin. ODC activities, polyamine and PCNA labeling index were biochemically and immunohistologically observed. Rat's mucosae with experimentally induced peptic ulcer treated with long term H2-RA, showed no morphological changes but at 30 weeks of H2-RA, had significantly higher value in PCNA labeling index and in polyamine (spermidine) quantity compared to control H2-RA alone and ulcer alone groups. These results suggest that long term administration of H2-RA, even after healing of the ulcer, may cause the gastric mucosa to possess a milieu in favour of precancerous changes, due to the increased proliferative activity of the cells.
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Affiliation(s)
- J Tsutsumi
- Second Department of Surgery, Jikei University School of Medicine
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Ohtani M, Takayama S, Ogata N, Sekine C, Nimura H, Tsutsumi J, Kashimura H, Sano Y, Inoue Y, Aoki T. [Usefulness of contrast-enhanced CT of the peritoneum to evaluate efficacy of neoadjuvant chemotherapy for peritoneal dissemination in an advanced gastric cancer case]. Gan To Kagaku Ryoho 1996; 23:1837-40. [PMID: 8937495] [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: 02/03/2023]
Abstract
We performed contrast-enhanced CT before and after chemotherapy in a patient with advanced gastric cancer to assess the efficacy of neoadjuvant chemotherapy for peritoneal dissemination. The patient was preoperatively given combined chemotherapy with UFT and CDDP. Hepatic metastatic and peritoneal disseminated foci were markedly reduced on CT. Thus CT proved to be useful for assessing peritoneal dissemination and the efficacy of neoadjuvant chemotherapy.
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Affiliation(s)
- M Ohtani
- Second Dept. of Surgery, Jikei University School of Medicine
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Aoki T, Takayama S, Nimura H, Tsutsumi J. [Therapy for the gastric cancer in the near future]. Nihon Geka Gakkai Zasshi 1996; 97:317-22. [PMID: 8692151] [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
Through the review of recent Japanese literatures, anticipated ways of the treatments for the gastric cancer in the near future were discussed. Most hopefully, no surgical intervention with the prevention and early diagnosis of initiation or promotions of the cancer development by genom analyses in individuals who may have high risk gene mutations will be expected. In the near future periods, however, vigorous molecular biological investigations for purpose will be required to clarify the mechanisms and each biological characteristics of the cancer developments. Further improvements of endoscopic ultrasonography and electron endoscopy will be needed for "early" detection of the lesions in the high risk group patients. More finely defined minimally invasive or extended operative procedures will still be challenged for molecular-biologically identified malignancies of the disease. Immuno-chemotherapy and chemotherapy aided by gene therapy will be the greatest hoperfull ways to conquer the disease. Direct concerns at the moment, however, cancer developments in the stomach with benign "ulcer" infected with Helicobacter Pylori must be urgently integrated for the prevention of the disease. Post-operative disorders after any type of surgery will still be one of the great issue in this until the complete achievements of above mentioned future tasks.
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Affiliation(s)
- T Aoki
- Department of Surgery II, Jikei University School of Medicine, Tokyo, Japan
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Tadaoka N, Takayama S, Sekine C, Fujimori T, Nimura H, Tsutsumi J, Kashimura H, Sano Y, Hirai K, Aoki T. [CDDP.UFT therapy for advanced or metastatic gastric cancer]. Gan To Kagaku Ryoho 1993; 20:1257-9. [PMID: 8333755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- N Tadaoka
- Dept. of Surgery II, Jikei University School of Medicine
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Tadaoka N, Takayama S, Sekine C, Fujimori T, Nimura H, Tsutsumi J, Kashimura H, Sano Y, Hirai K, Aoki T. [Effect of neoadjuvant chemotherapy (CDDP.UFT therapy) upon cell DNA analysis by flow cytometry in gastric carcinoma]. Gan To Kagaku Ryoho 1993; 20:799-803. [PMID: 8489288] [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: 01/31/2023]
Abstract
Neoadjuvant chemotherapy with CDDP and UFT was performed on far advanced gastric carcinoma cases whose curative resection was impossible. These trials were carried out on 10 patients who had Borrmann 4 type carcinoma. PR was found in 6 cases, for an efficacy rate of 60% (6/10). The DNA content in gastric carcinoma was determined before and after treatment by flow cytometry. The relationship between the change of DNA ploidy pattern and effects of chemotherapy was investigated. Aneuploidy was found in 6 of 10 patients (60.0%). DNA ploidy patterns showed no correlation with effectiveness. In aneuploid cases, the group of responders showed seemingly the change of ploidy pattern, from aneuploid to diploid. In non-responders the percentage of aneuploid cells increased. In diploid cases, an accumulation of S-phase fraction was observed in the group of responders. These results suggested that DNA ploidy analysis may provide additional diagnostic criteria for better assessment of chemotherapeutic effects.
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Affiliation(s)
- N Tadaoka
- Dept. of Surgery II, Jikei University School of Medicine
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Takayama S, Aoki T, Hirai K, Fujimori T, Sekine C, Tadaoka N, Nimura H, Tsutsumi J, Kashimura H, Sano Y. [Clinico-pharmacological study on UFT enteric-coated granules for gastric cancer patients]. Gan To Kagaku Ryoho 1993; 20:537-9. [PMID: 8452393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- S Takayama
- Second Dept. of Surgery, Jikei University School of Medicine
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Hamamura S, Tsutsumi J, Jo M, Kitamura C, Yamada M. [Surgery in patients with infection--the results of a survey on the attitudes of medical staff towards surgery in patients with infectious diseases]. Kango Gijutsu 1989; 35:1317-20. [PMID: 2630729] [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: 01/01/2023]
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Yamakawa I, Shimomura M, Hattori T, Watanabe S, Tsutsumi J, Shinoda A, Miyake Y. In vitro and in vivo evaluation of a sustained release preparation containing phenylpropanolamine hydrochloride. J Pharmacobiodyn 1986; 9:947-52. [PMID: 3572716 DOI: 10.1248/bpb1978.9.947] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The relationship between dissolution behaviour and plasma concentration after administration of a sustained-release preparation containing phenylpropanolamine hydrochloride was studied in 11 male volunteers. The testing for dissolution was carried out using the JP X rotating basket procedure, and human plasma samples were assayed for phenylpropanolamine hydrochloride by a specific high-performance liquid chromatography. Three hours after dosing, the mean peak plasma concentration was 104.1 ng/ml and the plasma concentration declined with a half-life of 4.85 h. The time course of plasma and dissolution data were analyzed by a non-linear least squares curve fitting method to compare in vivo and in vitro release behaviour. Plasma concentration changes of phenylpropanolamine hydrochloride were correlated with in vitro release behaviour of the sustained-release preparation.
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Tanaka M, Hasegawa J, Tsutsumi J, Fujita T. Determination of the anti-ulcer agent geranylgeranylacetone in serum by gas chromatography-mass spectrometry. J Chromatogr 1982; 231:301-10. [PMID: 7130310] [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: 01/23/2023]
Abstract
A highly specific and sensitive method for the determination of the anti-ulcer drug geranylgeranylacetone (GGA) in human serum is described. The extract from serum with hexane was saponified with potassium hydroxide and subjected to silica gel column chromatography to remove interfering substances. GGA in the partially purified extract was then reacted with O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine and measured by selected ion monitoring using gas chromatography--mass spectrometry. A low detection limit (1 ng/ml) and high precision were obtained.
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Kuwada M, Tateyama T, Tsutsumi J. Simultaneous determination of verapamil and its seven metabolites by high-performance liquid chromatography. J Chromatogr 1981; 222:507-11. [PMID: 7228962 DOI: 10.1016/s0378-4347(00)84156-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Takatsu T, Tsutsumi J, Kubo S, Kino M, Nishioka A, Suwa M, Morita H, Hirota Y, Kitaura Y, Kawamura K. [Management of congestive heart failure (2). Diuretic administration and vasodilator therapy of cardiac asthma and pulmonary edema (cardiac load reduction) with special reference to SQ 14225 (captopril)]. Nihon Rinsho 1980; 38:408-31. [PMID: 6993729] [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: 01/22/2023]
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Takatsu T, Kino M, Iga K, Hirota Y, Morita H, Sonotani N, Deguchi H, Noda S, Kitaura Y, Kubo S, Tsutsumi J, Kawamura K. [Mitral valve prolapse--auscultation, ECG, echocardiography and angiocardiography of mitral valve prolapse]. Nihon Rinsho 1979; 37:4030-56. [PMID: 537187] [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: 12/23/2022]
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23
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Takatsu T, Kino M, Kita Y, Tsujimoto G, Noda S, Sonotani N, Hirota Y, Kubo S, Tsutsumi J, Kawamura K. [Surgical management of coronary diseases. (2) Ventricular aneurysm following acute myocardial infarct, left main coronary arterial lesions, and aortocoronary bypass graft in involvement of 2 arteries]. Nihon Rinsho 1979; 37:3541-63. [PMID: 316464] [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: 12/14/2022]
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24
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Takatsu T, Kino M, Sonotani N, Suwa M, Iga K, Morita H, Hirota Y, Kitaura Y, Kubo S, Tsutsumi J, Kawanura K. [Endocardial cushion defect--diagnosis of ostium primum atrial septum defect associated with mitral valve cleft, with special reference to ultrasonic cardiography and angiocardiography]. Nihon Rinsho 1979; 37:1071-91. [PMID: 470161] [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: 12/15/2022]
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25
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Shino M, Nezu Y, Tateyama T, Sakaguchi K, Katayama K, Tsutsumi J, Kawabe K. [Determination method of bile acids in biological materials by mass fragmentography (author's transl)]. YAKUGAKU ZASSHI 1979; 99:421-31. [PMID: 480141 DOI: 10.1248/yakushi1947.99.4_421] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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26
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Takatsu T, Kino M, Yamamoto S, Imamura K, Sonotani N, Deguchi H, Morita H, Hirota Y, Kubo S, Tsutsumi J, Kawamura K. [Marfan's syndrome and cardiovascular symptoms--diagnosis of Marfan's syndrome and surgical management of dissecting aortic aneurysm]. Nihon Rinsho 1979; 37:580-603. [PMID: 439447] [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: 12/15/2022]
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27
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Takatsu T, Kino M, Hanamoto S, Sonotani N, Morita H, Nagao H, Furubayashi K, Imamura K, Noda S, Uehara H, Hirota Y, Kitaura Y, Kubo S, Tsutsumi J, Kawamura K. [Cardiac amyloidosis--biopsy of the ventricle, pericardium and myocardium: sick sinus syndrome and hemodynamics: and symptoms of amyloidosis]. Nihon Rinsho 1979; 37:179-203. [PMID: 430840] [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: 12/15/2022]
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28
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Takatsu T, Kino M, Deguchi H, Sonotani N, Morita H, Nishimura H, Imamura K, Hirota Y, Kitaura Y, Kubo S, Tsutsumi J, Kawamura K, Kashii C. [Heart atrial myxoma--various types of cardiac tumors and diagnosis of myxoma with special reference to echocardiography and cardiac angiography]. Nihon Rinsho 1978; 36:3912-33. [PMID: 748614] [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: 12/24/2022]
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29
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Takatsu T, Kino M, Hyong H, Morita H, Suwa M, Imamura K, Hirota Y, Kitaura Y, Tsutsumi J, Kawamura K, Torii H. [Constrictive pericarditis associated with combined valvular diseases--etiology of constrictive pericarditis and echocardiography]. Nihon Rinsho 1978; 36:3640-55. [PMID: 731950] [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: 12/24/2022]
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30
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Takatsu T, Kido T, Kino M, Morita H, Suwa M, Hirota Y, Kitaura Y, Tsutsumi J, Kawamura K. [Isolated tricuspid valve insufficiency--congenital and traumatic insufficiencies]. Nihon Rinsho 1978; 36:2968-81. [PMID: 713063] [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: 12/24/2022]
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31
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Takatsu T, Morita H, Kubo S, Sonotani N, Nishioka A, Noda S, Imamura K, Hirota Y, Kitaura Y, Tsutsumi J, Kawamura K. [Idiopathic cardiomyopathy in refractory congestive heart failure]. Nihon Rinsho 1978; 36:2802-22. [PMID: 702869] [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: 12/24/2022]
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32
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Takatsu T, Morita H, Sonotani N, Kino M, Noda S, Imamura K, Hirota Y, Kitaura Y, Kubo S, Tsutsumi J, Kawamura K. [Congenital mitral valve insufficiency--congenital mitral valve diseases and cleft mitral valve]. Nihon Rinsho 1978; 36:2538-52. [PMID: 702847] [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: 12/24/2022]
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33
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Takatsu T, Kino M, Morita H, Sonotani N, Noda S, Suwa M, Nishida S, Imamura K, Chin N, Hirota Y, Kitaura Y, Kubo S, Tsutsumi J, Kawamura K. [Hypertrophy of the apex in hypertrophic cardiomyopathy--study on asymmetrical aseptal hypertrophy, systolic anterior movement, and left ventricular outflow obstruction in hypertrophic myocardiopathy and apical hypertrophy]. Nihon Rinsho 1978; 36:856-77. [PMID: 566805] [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: 12/23/2022]
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34
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Yuzuriha T, Katayama K, Tsutsumi J. Studies on biotransformation of lysozyme. IV. Radioimmunoassay of lysozyme and its evaluation. Chem Pharm Bull (Tokyo) 1978; 26:908-14. [PMID: 647859 DOI: 10.1248/cpb.26.908] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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35
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Takatsu T, Kino M, Morita H, Kitaura Y, Kubo S, Tsutsumi J, Kawamura K. [Idiopathic dilatation of the pulmonary artery--prominent second left arch in the frontal view of the heart by thoracic radiography]. Nihon Rinsho 1977; 35:3954-65. [PMID: 599677] [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: 12/23/2022]
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36
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Suwa M, Tanijuri H, Inoue K, Hori K, Tsutsumi J. [Chronic thyroiditis associated with myxedema--a case study]. Nihon Rinsho 1976; 34:1723-9. [PMID: 989874] [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: 12/25/2022]
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37
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Tsutsumi J, Hori K, Yajiri H. [Sensori-motor disturbances (with fever and cognition disorder): ventricular ependymoma]. Nihon Rinsho 1975; Spec No:838-9, 1250-1. [PMID: 1240391] [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: 12/26/2022]
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38
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Takatsu T, Tsutsumi J, Kurimoto K, Kitaura Y, Imamura K. [Idiopathic cardiomyopathy--clinical presentation of hypertrophic cardiomyopathy]. Nihon Rinsho 1974; 32:2694-703. [PMID: 4474474] [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: 01/10/2023]
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39
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Takatsu T, Kawai C, Tsutsumi J, Hori K, Yamashita K. [Pathological classification of idiopathic cardiomyopathy]. Nihon Rinsho 1973; 31:124-54. [PMID: 4266425] [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: 01/09/2023]
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40
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Tsutsumi J. [Diuretics]. Nihon Rinsho 1970; 28 Suppl:730-3. [PMID: 5469107] [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: 01/15/2023]
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41
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Takatsu T, Kashii C, Tsutsumi J, Yamashita K. [Case of acute pericarditis caused by Coxsackie virus B]. Naika 1968; 22:541-6. [PMID: 5708426] [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: 01/16/2023]
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42
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Takatsu T, Kawai C, Tsutsumi J, Inoue K. A case of idiopathic myocardiopathy with deposits of a peculiar substance in the myocardium; diagnosis by endomyocardial biopsy. Am Heart J 1968; 76:93-104. [PMID: 4232286 DOI: 10.1016/0002-8703(68)90300-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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43
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Takatsu T, Kawai C, Tsutsumi J. [Management of shock]. Naika 1968; 22:65-79. [PMID: 5708412] [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: 01/16/2023]
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Abstract
Ciguatoxin, the agent responsible for ciguatera, a disease produced in humans from ingestion of certain fishes, has been isolated from specimens of the moray eel, Gymnothorax javanicus. The toxin is apparently a lipid containing quaternary nitrogen, hydroxyl, and carbonyl functions.
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Takatsu T, Tsutsumi J. [Selection and combination of diuretics]. Nihon Rinsho 1965; 23:2149-68. [PMID: 5329402] [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: 01/14/2023]
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