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Eguchi K, Yaguchi H, Kudo I, Kimura I, Nabekura T, Kumagai R, Fujita K, Nakashiro Y, Iida Y, Hamada S, Honma S, Takei A, Moriwaka F, Yabe I. Differentiation of speech in Parkinson's disease and spinocerebellar degeneration using deep neural networks. J Neurol 2024; 271:1004-1012. [PMID: 37989963 DOI: 10.1007/s00415-023-12091-5] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 10/29/2023] [Accepted: 10/30/2023] [Indexed: 11/23/2023]
Abstract
INTRODUCTION Assessing dysarthria features in patients with neurodegenerative diseases helps diagnose underlying pathologies. Although deep neural network (DNN) techniques have been widely adopted in various audio processing tasks, few studies have tested whether DNNs can help differentiate neurodegenerative diseases using patients' speech data. This study evaluated whether a DNN model using a transformer architecture could differentiate patients with Parkinson's disease (PD) from patients with spinocerebellar degeneration (SCD) using speech data. METHODS Speech data were obtained from 251 and 101 patients with PD and SCD, respectively, while they read a passage. We fine-tuned a pre-trained DNN model using log-mel spectrograms generated from speech data. The DNN model was trained to predict whether the input spectrogram was generated from patients with PD or SCD. We used fivefold cross-validation to evaluate the predictive performance using the area under the receiver operating characteristic curve (AUC) and accuracy, sensitivity, and specificity. RESULTS Average ± standard deviation of the AUC, accuracy, sensitivity, and specificity of the trained model for the fivefold cross-validation were 0.93 ± 0.04, 0.87 ± 0.03, 0.83 ± 0.05, and 0.89 ± 0.05, respectively. CONCLUSION The DNN model can differentiate speech data of patients with PD from that of patients with SCD with relatively high accuracy and AUC. The proposed method can be used as a non-invasive, easy-to-perform screening method to differentiate PD from SCD using patient speech and is expected to be applied to telemedicine.
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Affiliation(s)
- Katsuki Eguchi
- Hokuyukai Neurological Hospital, 4-30, 2jo, 2cho-me, Nijuyonken, Nishi-ku, Sapporo, 063-0802, Japan.
- Department of Neurology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan.
| | - Hiroaki Yaguchi
- Department of Neurology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan
| | - Ikue Kudo
- Hokuyukai Neurological Hospital, 4-30, 2jo, 2cho-me, Nijuyonken, Nishi-ku, Sapporo, 063-0802, Japan
| | - Ibuki Kimura
- Hokuyukai Neurological Hospital, 4-30, 2jo, 2cho-me, Nijuyonken, Nishi-ku, Sapporo, 063-0802, Japan
| | - Tomoko Nabekura
- Hokuyukai Neurological Hospital, 4-30, 2jo, 2cho-me, Nijuyonken, Nishi-ku, Sapporo, 063-0802, Japan
| | - Ryuto Kumagai
- Sapporo Parkinson MS Neurological Clinic, Sapporo Kita Sky Building F12, 7-6, Kita 7-Nishi 5, Kita-ku, Sapporo, Hokkaido, 060-0807, Japan
| | - Kenichi Fujita
- Hokuyukai Neurological Hospital, 4-30, 2jo, 2cho-me, Nijuyonken, Nishi-ku, Sapporo, 063-0802, Japan
| | - Yuichi Nakashiro
- Hokuyukai Neurological Hospital, 4-30, 2jo, 2cho-me, Nijuyonken, Nishi-ku, Sapporo, 063-0802, Japan
| | - Yuki Iida
- Hokuyukai Neurological Hospital, 4-30, 2jo, 2cho-me, Nijuyonken, Nishi-ku, Sapporo, 063-0802, Japan
| | - Shinsuke Hamada
- Hokuyukai Neurological Hospital, 4-30, 2jo, 2cho-me, Nijuyonken, Nishi-ku, Sapporo, 063-0802, Japan
| | - Sanae Honma
- Hokuyukai Neurological Hospital, 4-30, 2jo, 2cho-me, Nijuyonken, Nishi-ku, Sapporo, 063-0802, Japan
| | - Asako Takei
- Hokuyukai Neurological Hospital, 4-30, 2jo, 2cho-me, Nijuyonken, Nishi-ku, Sapporo, 063-0802, Japan
| | - Fumio Moriwaka
- Hokuyukai Neurological Hospital, 4-30, 2jo, 2cho-me, Nijuyonken, Nishi-ku, Sapporo, 063-0802, Japan
| | - Ichiro Yabe
- Department of Neurology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan
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Nio Y, Ishida H, Matsumoto N, Kusumoto S, Kubota Y, Tsunoda T, Sasaki Y, Fujita KI. Pharmacokinetics of gefitinib in elderly patients with EGFR-mutated advanced non-small cell lung cancer: a prospective study. BMC Pulm Med 2022; 22:454. [PMID: 36451169 PMCID: PMC9710131 DOI: 10.1186/s12890-022-02249-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 11/16/2022] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Gefitinib is recommended as a first-line treatment option for elderly patients with non-small cell lung cancer (NSCLC). Because no pharmacokinetics of gefitinib have been examined, we prospectively assessed the pharmacokinetics of gefitinib in patients with epidermal growth factor receptor gene-mutated advanced NSCLC who were 75 years or older. METHODS Gefitinib was orally administered once daily at a dose of 250 mg. The concentrations of gefitinib and its major metabolite O-desmethyl gefitinib in plasma were measured by high-performance liquid chromatography. The area under the plasma concentration-time curve from time 0 to 48 h (AUC0-48) was calculated. Polymorphisms in CYP3A5, CYP2D6, ABCG2, ABCB1, and OATP1B1 were analyzed by direct sequencing. RESULTS Eighteen patients with a median age of 80.5 years (range, 75-89) with adequate liver and kidney functions were examined. AUC0-48 values of gefitinib and O-desmethyl gefitinib in this population were 9.49 ± 3.5 and 10.6 ± 14 µM h, respectively. Compared to the gefitinib pharmacokinetics observed in a previous phase I study in Japan, systemic exposure to gefitinib in elderly patients was slightly higher than that in younger patients. Three patients experienced grade 3 diarrhea, increases in alanine aminotransferase, and aspartate aminotransferase levels 30 days after starting gefitinib treatment. The CYP2D6 genotype was associated with CYP2D6-mediated metabolism of gefitinib to O-desmethyl gefitinib. CONCLUSIONS We demonstrated for the first time the systemic exposure to gefitinib in elderly patients with NSCLC. TRIAL REGISTRATION The study was registered with the University Hospital Medical Information Network-Clinical Trials Registry Japan (UMIN000026409) on November 8, 2013.
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Affiliation(s)
- Yuta Nio
- grid.410714.70000 0000 8864 3422Department of Hospital Pharmaceutics, Showa University School of Pharmacy, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555 Japan
| | - Hiroo Ishida
- grid.410714.70000 0000 8864 3422Division of Medical Oncology, Department of Medicine, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555 Japan
| | - Natsumi Matsumoto
- grid.410714.70000 0000 8864 3422Division of Cancer Genome and Pharmacotherapy, Department of Clinical Pharmacy, Showa University School of Pharmacy, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555 Japan
| | - Sojiro Kusumoto
- grid.410714.70000 0000 8864 3422Division of Respirology and Allergology, Department of Medicine, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555 Japan
| | - Yutaro Kubota
- grid.410714.70000 0000 8864 3422Division of Medical Oncology, Department of Medicine, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555 Japan
| | - Takuya Tsunoda
- grid.410714.70000 0000 8864 3422Division of Medical Oncology, Department of Medicine, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555 Japan
| | - Yasutsuna Sasaki
- grid.410714.70000 0000 8864 3422Division of Medical Oncology, Department of Medicine, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555 Japan
| | - Ken-ichi Fujita
- grid.410714.70000 0000 8864 3422Division of Cancer Genome and Pharmacotherapy, Department of Clinical Pharmacy, Showa University School of Pharmacy, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555 Japan
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Shimbayashi T, Ito H, Shimizu M, Sano H, Sakaki S, Fujita KI. Effect of Substituents in Functional Bipyridonate Ligands on Ruthenium‐Catalyzed Dehydrogenative Oxidation of Alcohols: An Experimental and Computational Study. ChemCatChem 2022. [DOI: 10.1002/cctc.202200280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Takuya Shimbayashi
- Kyoto University Graduate School of Human and Environmental Studies Yoshidanihonmatsu-cho, Sakyo-ku 606-8501 Kyoto JAPAN
| | - Hajime Ito
- Kyoto University - Yoshida Campus: Kyoto Daigaku Graduate School of Human and Environmental Studies JAPAN
| | - Mineyuki Shimizu
- Kyoto University - Yoshida Campus: Kyoto Daigaku Graduate School of Human and Environmental Studies JAPAN
| | - Hayato Sano
- Kyoto University - Yoshida Campus: Kyoto Daigaku Graduate School of Human and Environmental Studies JAPAN
| | - Shigeyoshi Sakaki
- Kyoto University: Kyoto Daigaku Element Strategy Initiative for Catalysts and Batteries Goryo-Ohara, Nishikyo-ku 615-8245 Kyoto JAPAN
| | - Ken-ichi Fujita
- Kyoto University - Yoshida Campus: Kyoto Daigaku Graduate School of Human and Environmental Studies Yoshidanihonmatsucho, Sakyo-ku 606-8501 Kyoto JAPAN
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Matsuo H, Choi JC, Fujitani T, Fujita KI. Carbonylation of o-phenylenediamines with CO2 to 2-benzimidazolones catalyzed by alumina. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Takada F, Okuyama H, Nakamura S, Fujita KI. Application of Personal Health Record in Enhancing the Quality of Life in Patients With Breast Cancer Who Received Adjuvant Hormonal Therapy. Eur J Breast Health 2022; 18:155-162. [DOI: 10.4274/ejbh.galenos.2022.2021-12-2] [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] [Received: 12/29/2021] [Accepted: 02/07/2022] [Indexed: 12/01/2022]
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Yamanaka Y, Ishizuka T, Fujita KI, Fujiwara N, Kurata M, Masuda S. CHERP Regulates the Alternative Splicing of pre-mRNAs in the Nucleus. Int J Mol Sci 2022; 23:ijms23052555. [PMID: 35269695 PMCID: PMC8910253 DOI: 10.3390/ijms23052555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 02/23/2022] [Accepted: 02/23/2022] [Indexed: 12/17/2022] Open
Abstract
Calcium homeostasis endoplasmic reticulum protein (CHERP) is colocalized with the inositol 1,4,5-trisphosphate receptor (IP3R) in the endoplasmic reticulum or perinuclear region, and has been involved in intracellular calcium signaling. Structurally, CHERP carries the nuclear localization signal and arginine/serine-dipeptide repeats, like domain, and interacts with the spliceosome. However, the exact function of CHERP in the nucleus remains unknown. Here, we showed that poly(A)+ RNAs accumulated in the nucleus of CHERP-depleted U2OS cells. Our global analysis revealed that CHERP regulated alternative mRNA splicing events by interaction with U2 small nuclear ribonucleoproteins (U2 snRNPs) and U2 snRNP-related proteins. Among the five alternative splicing patterns analyzed, intron retention was the most frequently observed event. This was in accordance with the accumulation of poly(A)+ RNAs in the nucleus. Furthermore, intron retention and cassette exon choices were influenced by the strength of the 5′ or 3′ splice site, the branch point site, GC content, and intron length. In addition, CHERP depletion induced anomalies in the cell cycle progression into the M phase, and abnormal cell division. These results suggested that CHERP is involved in the regulation of alternative splicing.
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Affiliation(s)
- Yasutaka Yamanaka
- Division of Integrated Life Sciences, Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan; (Y.Y.); (T.I.); (K.-i.F.); (N.F.); (M.K.)
| | - Takaki Ishizuka
- Division of Integrated Life Sciences, Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan; (Y.Y.); (T.I.); (K.-i.F.); (N.F.); (M.K.)
| | - Ken-ichi Fujita
- Division of Integrated Life Sciences, Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan; (Y.Y.); (T.I.); (K.-i.F.); (N.F.); (M.K.)
- Division of Gene Expression Mechanism, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake 470-1192, Japan
| | - Naoko Fujiwara
- Division of Integrated Life Sciences, Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan; (Y.Y.); (T.I.); (K.-i.F.); (N.F.); (M.K.)
| | - Masashi Kurata
- Division of Integrated Life Sciences, Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan; (Y.Y.); (T.I.); (K.-i.F.); (N.F.); (M.K.)
| | - Seiji Masuda
- Division of Integrated Life Sciences, Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan; (Y.Y.); (T.I.); (K.-i.F.); (N.F.); (M.K.)
- Department of Food Science and Nutrition, Faculty of Agriculture, Kindai University, Nara 631-8505, Japan
- Correspondence: ; Tel.: +81-742-43-1713
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Ogita A, Murata W, Yamauchi K, Sakai A, Yamaguchi Y, Tanaka T, Fujita KI. Immature Pear Extract Constituents Exert Multifaceted Anti-aging Effects. Innov Aging 2021. [PMCID: PMC8681370 DOI: 10.1093/geroni/igab046.2556] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Chronic calorie restriction (CR) without malnutrition delays the onset of aging, extends lifespan, and improves metabolic function in many species. These CR-induced benefits have largely concentrated on the role of insulin signaling, while ignoring its counter-regulatory hormone, glucagon. Like insulin, hyperglucagonemia and decreased glucagon sensitivity are associated with impaired glucose homeostasis and decreased longevity. Conversely, activation of target molecules downstream of glucagon signaling such as AMPK and FGF21 are known to ameliorate these age-related impairments in metabolic function. To investigate the potential role of glucagon receptor signaling in CR-induced improvements in aging, we have implemented a moderate 15% CR in the mouse. Our studies show that a 15% calorie restriction initiated at 4 months of age enhances hypoglycemia-stimulated glucagon secretion (P<.01) and decreases basal serum glucagon (P<.01), while having no effect on glucagon receptor expression at the liver in 26-month-old mice. Consistent with enhanced hepatic glucagon sensitivity, CR increases glucagon-stimulated hepatic cyclic AMP production (P<.05). Glucagon is a primary regulator of AMPK activation and FGF21 release, both of which have been proposed as key molecules to account for CR-induced benefits to aging. CR increases both hepatic AMPK activation (P<.05) and FGF21 mRNA expression (P<.05). Additionally, CR reduces hepatic lipid accumulation (P<.05), and decreases fasting respiratory quotient (P<.001), indicating an increase in lipid oxidation. Our studies demonstrate that a moderate (15%) CR regimen enhances glucagon sensitivity and decreases hepatic lipid accumulation in aged mice. Thus, we propose glucagon signaling as a mediator of CR-induced improvements in aging.
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Affiliation(s)
| | - Wakae Murata
- Yonago National College of Technology, yonago, Tottori, Japan
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Matsuda T, Fujita K, Hamamatsu Y, Sakamaki T, Maki T. Parent–child‐based navigation method of multiple autonomous underwater vehicles for an underwater self‐completed survey. J FIELD ROBOT 2021. [DOI: 10.1002/rob.22038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Takumi Matsuda
- School of Science and Technology Meiji University Kanagawa Japan
- Institute of Industrial Science The University of Tokyo Tokyo Japan
| | - Kenichi Fujita
- Institute of Industrial Science The University of Tokyo Tokyo Japan
| | - Yuya Hamamatsu
- Institute of Industrial Science The University of Tokyo Tokyo Japan
| | - Takashi Sakamaki
- Institute of Industrial Science The University of Tokyo Tokyo Japan
| | - Toshihiro Maki
- Institute of Industrial Science The University of Tokyo Tokyo Japan
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Otani Y, Fujita KI, Kameyama T, Mayeda A. The Exon Junction Complex Core Represses Cancer-Specific Mature mRNA Re-splicing: A Potential Key Role in Terminating Splicing. Int J Mol Sci 2021; 22:ijms22126519. [PMID: 34204574 PMCID: PMC8234774 DOI: 10.3390/ijms22126519] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 06/08/2021] [Indexed: 02/08/2023] Open
Abstract
Using TSG101 pre-mRNA, we previously discovered cancer-specific re-splicing of mature mRNA that generates aberrant transcripts/proteins. The fact that mRNA is aberrantly re-spliced in various cancer cells implies there must be an important mechanism to prevent deleterious re-splicing on the spliced mRNA in normal cells. We thus postulated that mRNA re-splicing is controlled by specific repressors, and we searched for repressor candidates by siRNA-based screening for mRNA re-splicing activity. We found that knock-down of EIF4A3, which is a core component of the exon junction complex (EJC), significantly promoted mRNA re-splicing. Remarkably, we could recapitulate cancer-specific mRNA re-splicing in normal cells by knock-down of any of the core EJC proteins, EIF4A3, MAGOH, or RBM8A (Y14), implicating the EJC core as the repressor of mRNA re-splicing often observed in cancer cells. We propose that the EJC core is a critical mRNA quality control factor to prevent over-splicing of mature mRNA.
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Affiliation(s)
- Yuta Otani
- Division of Gene Expression Mechanism, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake 470-1192, Aichi, Japan; (Y.O.); (K.-i.F.)
- Laboratories of Discovery Research, Nippon Shinyaku Co., Ltd., Kyoto 601-8550, Kyoto, Japan
| | - Ken-ichi Fujita
- Division of Gene Expression Mechanism, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake 470-1192, Aichi, Japan; (Y.O.); (K.-i.F.)
| | - Toshiki Kameyama
- Division of Gene Expression Mechanism, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake 470-1192, Aichi, Japan; (Y.O.); (K.-i.F.)
- Department of Physiology, School of Medicine, Fujita Health University, Toyoake 470-1192, Aichi, Japan
- Correspondence: (T.K.); (A.M.)
| | - Akila Mayeda
- Division of Gene Expression Mechanism, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake 470-1192, Aichi, Japan; (Y.O.); (K.-i.F.)
- Correspondence: (T.K.); (A.M.)
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Ueda Y, Tahara YO, Miyata M, Ogita A, Yamaguchi Y, Tanaka T, Fujita KI. Involvement of a Multidrug Efflux Pump and Alterations in Cell Surface Structure in the Synergistic Antifungal Activity of Nagilactone E and Anethole against Budding Yeast Saccharomyces cerevisiae. Antibiotics (Basel) 2021; 10:antibiotics10050537. [PMID: 34066540 PMCID: PMC8148520 DOI: 10.3390/antibiotics10050537] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/02/2021] [Accepted: 05/03/2021] [Indexed: 11/16/2022] Open
Abstract
Nagilactone E, an antifungal agent derived from the root bark of Podocarpus nagi, inhibits 1,3-β glucan synthesis; however, its inhibitory activity is weak. Anethole, the principal component of anise oil, enhances the antifungal activity of nagilactone E. We aimed to determine the combinatorial effect and underlying mechanisms of action of nagilactone E and anethole against the budding yeast Saccharomyces cerevisiae. Analyses using gene-deficient strains showed that the multidrug efflux pump PDR5 is associated with nagilactone E resistance; its transcription was gradually restricted in cells treated with the drug combination for a prolonged duration but not in nagilactone-E-treated cells. Green-fluorescent-protein-tagged Pdr5p was intensively expressed and localized on the plasma membrane of nagilactone-E-treated cells but not in drug-combination-treated cells. Quick-freeze deep-etch electron microscopy revealed the smoothening of intertwined fiber structures on the cell surface of drug-combination-treated cells and spheroplasts, indicating a decline in cell wall components and loss of cell wall strength. Anethole enhanced the antifungal activity of nagilactone E by enabling its retention within cells, thereby accelerating cell wall damage. The combination of nagilactone E and anethole can be employed in clinical settings as an antifungal, as well as a food preservative to restrict food spoilage.
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Affiliation(s)
- Yuki Ueda
- Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan; (Y.U.); (Y.O.T.); (M.M.); (A.O.); (Y.Y.); (T.T.)
| | - Yuhei O. Tahara
- Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan; (Y.U.); (Y.O.T.); (M.M.); (A.O.); (Y.Y.); (T.T.)
| | - Makoto Miyata
- Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan; (Y.U.); (Y.O.T.); (M.M.); (A.O.); (Y.Y.); (T.T.)
| | - Akira Ogita
- Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan; (Y.U.); (Y.O.T.); (M.M.); (A.O.); (Y.Y.); (T.T.)
- Research Center for Urban Health and Sports, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Yoshihiro Yamaguchi
- Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan; (Y.U.); (Y.O.T.); (M.M.); (A.O.); (Y.Y.); (T.T.)
| | - Toshio Tanaka
- Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan; (Y.U.); (Y.O.T.); (M.M.); (A.O.); (Y.Y.); (T.T.)
| | - Ken-ichi Fujita
- Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan; (Y.U.); (Y.O.T.); (M.M.); (A.O.); (Y.Y.); (T.T.)
- Correspondence: ; Tel.: +81-6-6605-2580
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Toyooka G, Tanaka T, Kitayama K, Kobayashi N, Watanabe T, Fujita KI. Hydrogen production from cellulose catalyzed by an iridium complex in ionic liquid under mild conditions. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02419h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A new and simple method for hydrogen production from cellulose using an iridium catalyst and an ionic liquid under mild conditions was developed.
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Affiliation(s)
- Genki Toyooka
- Graduate School of Human and Environmental Studies
- Kyoto University
- Kyoto
- Japan
| | - Toshiki Tanaka
- Graduate School of Human and Environmental Studies
- Kyoto University
- Kyoto
- Japan
| | | | - Naoko Kobayashi
- Research Institute for Sustainable Humanosphere
- Kyoto University
- Kyoto
- Japan
| | - Takashi Watanabe
- Research Institute for Sustainable Humanosphere
- Kyoto University
- Kyoto
- Japan
| | - Ken-ichi Fujita
- Graduate School of Human and Environmental Studies
- Kyoto University
- Kyoto
- Japan
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Ogita A, Murata W, Yamauchi K, Sakai A, Yamaguchi Y, Tanaka T, Fujita KI. Anti-Aging Effects of Hydrophobic and Hydrophilic Components From Immature Pear Fruits Extract. Innov Aging 2020. [PMCID: PMC7740787 DOI: 10.1093/geroni/igaa057.427] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Cellular senescence, the decline of cellular function due to aging, causes gradual loss of physiological functions and induces some chronic diseases, which negatively affect the quality of human life. Intervention in the cellular senescence process may reduce these incidences and delay the progression of age-related diseases, thereby contributing to the longevity of human lifespan. The budding yeast, Saccharomyces cerevisiae, is a model system that can provide significant insights into the genetics and molecular biology of senescence and is a suitable cellular model for research on mammalian cells. In the 2019 GSA meeting, we had revealed that the prolongation of yeast cell lifespan was induced by the addition of immature pear fruits extracts (iPE). In this study, we have focused on investigating the anti-senescence effects of hydrophilic (WiPE) and hydrophobic (OiPE) components of iPE on yeast cells and their genes and their possible application in extending human lifespan. The anti-aging effects of iPE were investigated using a chronological lifespan assay on S. cerevisiae cells. The chronological lifespan of the yeast was significantly extended in those treated with both WiPE and OiPE at 1% (v/v). The expression of sirtuin-related genes, which regulate cellular senescence, was examined by RT-PCR. Interestingly, gene expression was found to be significantly increased only in WiPE treated cells. The results suggested that the different polarity components from iPE exhibited anti-aging effects on the cells via different mechanisms. Research on the identification of useful components in iPE and the possibility of application to mammalian cells is ongoing.
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Affiliation(s)
| | - Wakae Murata
- Yonago National College of Technology, Yonago, Tottori, Japan
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Affiliation(s)
- Mitsuki Onoda
- Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Ken-ichi Fujita
- Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
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Park S, Jeong J, Fujita KI, Yamamoto A, Yoshida H. Anti-Markovnikov Hydroamination of Alkenes with Aqueous Ammonia by Metal-Loaded Titanium Oxide Photocatalyst. J Am Chem Soc 2020; 142:12708-12714. [DOI: 10.1021/jacs.0c04598] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Soyeong Park
- Department of Interdisciplinary Environment, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
| | - Jaeyoung Jeong
- Department of Interdisciplinary Environment, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
| | - Ken-ichi Fujita
- Department of Interdisciplinary Environment, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
| | - Akira Yamamoto
- Department of Interdisciplinary Environment, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Kyoto 606-8501, Japan
| | - Hisao Yoshida
- Department of Interdisciplinary Environment, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Kyoto 606-8501, Japan
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15
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Fujita KI, Ishizuka T, Mitsukawa M, Kurata M, Masuda S. Regulating Divergent Transcriptomes through mRNA Splicing and Its Modulation Using Various Small Compounds. Int J Mol Sci 2020; 21:ijms21062026. [PMID: 32188117 PMCID: PMC7139312 DOI: 10.3390/ijms21062026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 03/11/2020] [Accepted: 03/12/2020] [Indexed: 12/14/2022] Open
Abstract
Human transcriptomes are more divergent than genes and contribute to the sophistication of life. This divergence is derived from various isoforms arising from alternative splicing. In addition, alternative splicing regulated by spliceosomal factors and RNA structures, such as the RNA G-quadruplex, is important not only for isoform diversity but also for regulating gene expression. Therefore, abnormal splicing leads to serious diseases such as cancer and neurodegenerative disorders. In the first part of this review, we describe the regulation of divergent transcriptomes using alternative mRNA splicing. In the second part, we present the relationship between the disruption of splicing and diseases. Recently, various compounds with splicing inhibitor activity were established. These splicing inhibitors are recognized as a biological tool to investigate the molecular mechanism of splicing and as a potential therapeutic agent for cancer treatment. Food-derived compounds with similar functions were found and are expected to exhibit anticancer effects. In the final part, we describe the compounds that modulate the messenger RNA (mRNA) splicing process and their availability for basic research and future clinical potential.
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Kusuhara H, Mori D, Ishida H, Mizuno T, Kazuya M, Fujita KI. P74 - Evaluation of endogenous biomarkers of OATP1B activity in patients with non-small cell lung cancer who receive paclitaxel. Drug Metab Pharmacokinet 2020. [DOI: 10.1016/j.dmpk.2020.04.075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Fujita K, Matsumoto N, Ishida H, Kubota Y, Iwai S, Shibanuma M, Kato Y. Decreased Disposition of Anticancer Drugs Predominantly Eliminated via the Liver in Patients with Renal Failure. Curr Drug Metab 2019; 20:361-376. [PMID: 30947665 PMCID: PMC6700602 DOI: 10.2174/1389200220666190402143125] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 02/27/2019] [Accepted: 03/11/2019] [Indexed: 12/20/2022]
Abstract
Background: Evidence has revealed that renal impairment can affect the systemic exposure of drugs which are predominantly eliminated via the liver. The modulation of drug-metabolizing enzymes and transporters expressed in the liver and/or small intestine by diverse entities, including uremic toxins, in systemic circulation of patients with severe renal failure is considered as the cause of atypical pharmacokinetics, which sometimes induce undesirable adverse events that are especially critical for drugs with narrow therapeutic window such as anticancer drugs. A dosing strategy for anticancer drugs in these patients needs to be established. Methods: The effects of renal impairment on the systemic exposure and safety of anticancer drugs were summarized. The proposed mechanisms for the alterations in the pharmacokinetics of these anticancer drugs were also discussed. Results: Changes in pharmacokinetics and clinical response were reported in 9 out of 10 cytotoxic anticancer drugs investigated, although available information was limited and sometimes controversial. Systemic exposure of 3 out of 16 tyrosine kinase inhibitors was higher in patients with severe renal failure than that in patients with normal kidney function. An increase in systemic exposure of anticancer drugs in patients with renal impairment is likely to be observed for substrates of OATP1B1, despite the limited evidence. Conclusion: The molecular basis for the effect of uremia on non-renal drug elimination still needed to be clarified with further studies to generate generalizable concepts, which may provide insights into establishing better clinical usage of anticancer drugs, i.e. identifying patients at risk and dose adjustment.
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Affiliation(s)
- Kenichi Fujita
- Division of Cancer Cell Biology, Department of Pharmaceutical Sciences, Showa University School of Pharmacy, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 1428555, Japan
| | - Natsumi Matsumoto
- Department of Healthcare and Regulatory Sciences, Showa University School of Pharmacy, 1-5-8, Hatanodai, Shinagawa-ku, Tokyo 1428555, Japan.,Breast and Imaging Center, St. Marianna University School of Medicine, 6-7-2 Manpukuji, Asao-ku, Kawasaki 2158520, Japan
| | - Hiroo Ishida
- Department of Medical Oncology, Showa University School of Medicine, 1-5- 8 Hatanodai, Shinagawa-ku, Tokyo 1428555, Japan
| | - Yutaro Kubota
- Department of Medical Oncology, Showa University School of Medicine, 1-5- 8 Hatanodai, Shinagawa-ku, Tokyo 1428555, Japan
| | - Shinichi Iwai
- Department of Healthcare and Regulatory Sciences, Showa University School of Pharmacy, 1-5-8, Hatanodai, Shinagawa-ku, Tokyo 1428555, Japan
| | - Motoko Shibanuma
- Division of Cancer Cell Biology, Department of Pharmaceutical Sciences, Showa University School of Pharmacy, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 1428555, Japan
| | - Yukio Kato
- Molecular Pharmacotherapeutics, Faculty of Pharmacy, Kanazawa University, Kakuma-machi, Kanazawa 9201192, Japan
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Ogita A, Murata W, Hasegawa M, Yamauchi K, Sakai A, Yamaguchi Y, Tanaka T, Fujita KI. PROLONGATION OF HUMAN LIFESPAN BY IMMATURE PEAR EXTRACT MEDIATED SIRTUIN-RELATED GENE EXPRESSION. Innov Aging 2019. [PMCID: PMC6844947 DOI: 10.1093/geroni/igz038.365] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Demographics of the world are changing rapidly with older populations growing at an unprecedented rate. Cellular senescence, a decline of cellular function due to aging, causes gradual loss of physiological functions. Several cellular senescence-related chronic diseases, such as metabolic syndrome, cardiovascular disease, cancer, osteoporosis, diabetes, and hypertension, negatively affect the quality of human life. Intervention in the cellular senescence process may reduce these incidences and slow the progression of age-related diseases, while contributing to the longevity of healthy human lifespans. Saccharomyces cerevisiae, the budding yeast, is a simple model system that can provide significant insights into the human genetics and molecular biology of senescence and is considered suitable as a cellular model for research on mammalian cells. The aim of our study was to investigate the anti-aging effects of immature pear fruit extract (IPE) on yeast cells and its possible application to extend healthy lifespan in humans. Anti-aging effects of IPE were investigated using a chronological lifespan assay on S. cerevisiae cells. The chronological lifespan of the yeast treated with IPE at 1% (v/v) was significantly extended than that of untreated cells (p < 0.05). The expression of sirtuin-related genes, which regulate cellular senescence, was examined by reverse transcription-polymerase chain reaction and found to be significantly increased following IPE treatment. These results suggest that sirtuin-related genes have important roles in IPE-regulated lifespan extension, which provides a mechanism by which IPE could affect mammalian cells and potentially extend healthy human lifespans.
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Affiliation(s)
- Akira Ogita
- Graduate School of Sciences, Osaka City University., Osaka, Japan
| | - Wakae Murata
- Graduate School of Sciences, Osaka City University., Osaka, Japan
| | - Marina Hasegawa
- Department of Materials Science, National Institute of Technology, Yonago College., Yonago, Tottori, Japan
| | - Ken Yamauchi
- Institute of Physical Education, Keio University, Kanagawa, Japan
| | - Akiko Sakai
- Research Center for Urban Health and Sports, Osaka City University., Osaka, Japan
| | | | - Toshio Tanaka
- Graduate School of Sciences, Osaka City University., Osaka, Japan
| | - Ken-ichi Fujita
- Graduate School of Sciences, Osaka City University., Osaka, Japan
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Matsuo H, Fujii A, Choi JC, Fujitani T, Fujita KI. Carboxylative Cyclization of Propargylic Amines with Carbon Dioxide Catalyzed by Poly(amidoamine)-Dendrimer-Encapsulated Gold Nanoparticles. Synlett 2019. [DOI: 10.1055/s-0039-1690162] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
We prepared gold nanoparticles encapsulated in poly(amidoamine) (PAMAM) dendrimers as templating agents. The resulting gold nanoparticles were used as catalysts for the carboxylative cyclization of propargylic amines with carbon dioxide to afford the corresponding 1,3-oxazolidin-2-ones in yields of up to 99%.
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Affiliation(s)
| | | | | | | | - Ken-ichi Fujita
- National Institute of Advanced Industrial Science and Technology (AIST)
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21
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Minase M, Hayakawa T, Oya M, Fujita KI, Ogawa M. Improved Rheological Properties of Organophilic-Clay Suspensions by a Simple Pretreatment with a Wet Type Jet Mill. BCSJ 2019. [DOI: 10.1246/bcsj.20190051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Makoto Minase
- Laboratory of Applied Clay Technology (LACT), Hojun Co. Ltd., 1433-1 Haraichi, An-naka, Gunma 379-0133, Japan
| | - Takayuki Hayakawa
- Laboratory of Applied Clay Technology (LACT), Hojun Co. Ltd., 1433-1 Haraichi, An-naka, Gunma 379-0133, Japan
| | - Mitsuru Oya
- Laboratory of Applied Clay Technology (LACT), Hojun Co. Ltd., 1433-1 Haraichi, An-naka, Gunma 379-0133, Japan
| | - Ken-ichi Fujita
- Laboratory of Applied Clay Technology (LACT), Hojun Co. Ltd., 1433-1 Haraichi, An-naka, Gunma 379-0133, Japan
| | - Makoto Ogawa
- School of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong 21210, Thailand
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Kubota Y, Fujita KI, Takahashi T, Sunakawa Y, Ishida H, Hamada K, Ichikawa W, Tsunoda T, Masuo Y, Kato Y, Sasaki Y. Abstract 3883: High unbound plasma concentration of M-2, an active metabolite, is associated with shorter survival in patients with metastatic colorectal cancer who received regorafenib. Cancer Res 2019. [DOI: 10.1158/1538-7445.am2019-3883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background and Aims: Regorafenib is an oral multikinase inhibitor which showed survival advantage in the later-line chemotherapy in patients with metastatic colorectal cancer (mCRC). This anticancer drug is sequentially metabolized to pharmacologically active metabolites M-2 and M-5 by the hepatic CYP3A. A randomized phase II trial has recently revealed that initial dose of 80 mg/day followed by dose escalations (40 mg/week) was superior to the standard dosing strategy (160 mg/day) with respect to overall survival (OS), resulting in the NCCN guideline recommendation for this dose escalation strategy, although scientific index for rational dose estimation is still limited. The aim of this prospective study was to clarify the association of pharmacokinetics (PK) with clinical outcome of regorafenib in patients with mCRC.
Methods: Consecutive patients with mCRC administered regorafenib at Showa University Hospital were prospectively enrolled in this study. Patients received regorafenib 160 mg once daily for the first 3 weeks of each 4 weeks cycle. Blood samples for PK analysis were obtained on day1 (0-48 h) skipping the second dose on day2, and if possible day15 of treatment (0-24 h). Plasma concentrations of the regorafenib, M-2, and M-5 were analyzed by HPLC or LC-MS/MS. Unbound fraction of these compounds were measured by equilibrium dialysis method.
Results: A total of 36 patients were enrolled between October 2013 and June 2017. The median progression free survival (PFS) was 1.9 months, and the median OS was 6.4 months. Area under the total (protein bound plus unbound) plasma concentration-time curve (AUC) on day1 was the highest in regorafenib (88.5 ± 53.8 µM·h), followed by M-2 and M-5 (37.0 ± 32.9 and 5.9 ± 6.5 µM·h, respectively), whereas AUC calculated based on unbound plasma concentration (uAUC) of M-2 was the highest (9.8 ± 12.0 nM·h), followed by M-5 and regorafenib (2.5 ± 4.3 and 1.8 ± 1.7 nM·h, respectively), reflecting ~10-fold higher unbound fraction in M-2 and M-5 than regorafenib. uAUC of M-2 measured on day15 was also higher than those of M-5 and regorafenib. Patients with the M-2 uAUC of 9.8 nM·h or higher had significantly shorter PFS than those with the uAUC of lower than 9.8 nM·h (30 vs. 74 days, p=0.0092). The highest uAUC value of M-2 may be compatible with its association with PFS, implying that unbound form of M-2 could be primarily important for clinical response.
Conclusion: We thus found that uAUC of active M-2 was the highest as compared to those of regorafenib and M-5, which was associated with shorter PFS.
Citation Format: Yutaro Kubota, Ken-ichi Fujita, Takehiro Takahashi, Yu Sunakawa, Hiroo Ishida, Kazuyuki Hamada, Wataru Ichikawa, Takuya Tsunoda, Yusuke Masuo, Yukio Kato, Yasutsuna Sasaki. High unbound plasma concentration of M-2, an active metabolite, is associated with shorter survival in patients with metastatic colorectal cancer who received regorafenib [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2019; 2019 Mar 29-Apr 3; Atlanta, GA. Philadelphia (PA): AACR; Cancer Res 2019;79(13 Suppl):Abstract nr 3883.
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Affiliation(s)
| | | | | | - Yu Sunakawa
- 3St. Marianna University School of Medicine, Kanagawa, Japan
| | - Hiroo Ishida
- 1Showa University School of Medicine, Tokyo, Japan
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Al-Shammari AH, Masuo Y, Fujita KI, Yoshikawa Y, Nakamichi N, Kubota Y, Sasaki Y, Kato Y. Influx and Efflux Transporters Contribute to the Increased Dermal Exposure to Active Metabolite of Regorafenib After Repeated Oral Administration in Mice. J Pharm Sci 2019; 108:2173-2179. [DOI: 10.1016/j.xphs.2019.01.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 01/15/2019] [Accepted: 01/17/2019] [Indexed: 02/07/2023]
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Affiliation(s)
- Ken-ichi Fujita
- Department of Interdisciplinary Environment, Graduate School of Human and Environmental Studies, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
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Enomoto A, Kajita S, Fujita KI. Convenient Method for the Production of Deuterium Gas Catalyzed by an Iridium Complex and Its Application to the Deuteration of Organic Compounds. CHEM LETT 2019. [DOI: 10.1246/cl.180870] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Akane Enomoto
- Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Shunpei Kajita
- Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Ken-ichi Fujita
- Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
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Fujita KI. Development of Efficient Methods for Organic Synthesis, Hydrogen Storage, and Hydrogen Production Based on Catalytic Dehydrogenation of Organic Molecules. J SYN ORG CHEM JPN 2019. [DOI: 10.5059/yukigoseikyokaishi.77.112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ken-ichi Fujita
- Graduate School of Human and Environmental Studies, Kyoto University
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Fujita KI, Enomoto A, Shimbayashi T. Environmentally Friendly Synthesis of N-Methylated Nitrogen Heterocycles from an Aqueous Solution of Methylamine and Diols. HETEROCYCLES 2019. [DOI: 10.3987/com-19-14114] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Katov Y, Hasan A, Masuo Y, Fujita KI, Kubota Y, Sasaki Y. ABC xenobiotic transporters play important roles in systemic exposure and dermal distribution of tyrosine kinase inhibitor regorafenib and its active metabolites. Drug Metab Pharmacokinet 2019. [DOI: 10.1016/j.dmpk.2018.09.249] [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: 11/30/2022]
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Tsuboya A, Fujita KI, Kubota Y, Ishida H, Taki-Takemoto I, Kamei D, Iwai S, Sasaki Y. Coadministration of cytotoxic chemotherapeutic agents with irinotecan is a risk factor for irinotecan-induced cholinergic syndrome in Japanese patients with cancer. Int J Clin Oncol 2018; 24:222-230. [DOI: 10.1007/s10147-018-1347-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 09/16/2018] [Indexed: 12/01/2022]
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30
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Kuwahara M, Nishioka M, Yoshida M, Fujita KI. Front Cover: A Sustainable Method for the Synthesis of Acetic Acid Based on Dehydrogenation of an Ethanol-Water Solution Catalyzed by an Iridium Complex Bearing a Functional Bipyridonate Ligand (ChemCatChem 17/2018). ChemCatChem 2018. [DOI: 10.1002/cctc.201801287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Masato Kuwahara
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Masaaki Nishioka
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Masato Yoshida
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Ken-ichi Fujita
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
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31
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Kuwahara M, Nishioka M, Yoshida M, Fujita KI. A Sustainable Method for the Synthesis of Acetic Acid Based on Dehydrogenation of an Ethanol-Water Solution Catalyzed by an Iridium Complex Bearing a Functional Bipyridonate Ligand. ChemCatChem 2018. [DOI: 10.1002/cctc.201801329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Masato Kuwahara
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Masaaki Nishioka
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Masato Yoshida
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Ken-ichi Fujita
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
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Fujita KI, Toyooka G, Tuji A. Efficient and Versatile Catalytic Systems for the N-Methylation of Primary Amines with Methanol Catalyzed by N-Heterocyclic Carbene Complexes of Iridium. SYNTHESIS-STUTTGART 2018. [DOI: 10.1055/s-0037-1610252] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Efficient and versatile catalytic systems were developed for the N-methylation of both aliphatic and aromatic primary amines using methanol as the methylating agent. Iridium complexes bearing an N-heterocyclic carbene (NHC) ligand exhibited high catalytic performance for this type of transformation. For aliphatic amines, selective N,N-dimethylation was achieved at low temperatures (50–90 °C). For aromatic amines, selective N-monomethylation and selective N,N-dimethylation were accomplished by simply changing the reaction conditions (presence or absence of a base with an appropriate catalyst). These findings can be used to develop methods for synthesizing useful amine compounds having N-methyl or N,N-dimethyl moieties.
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Affiliation(s)
- Ken-ichi Fujita
- Graduate School of Human and Environmental Studies, Kyoto University
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Affiliation(s)
- Ken-ichi Fujita
- Institute of Molecular Oncology, Showa University Tokyo, Japan
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Fujii A, Matsuo H, Choi JC, Fujitani T, Fujita KI. Efficient synthesis of 2-oxazolidinones and quinazoline-2,4(1H,3H)-diones from CO2 catalyzed by tetrabutylammonium fluoride. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.04.059] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Kuwahara M, Nishioka M, Yoshida M, Fujita KI. A Sustainable Method for the Synthesis of Acetic Acid Based on Dehydrogenation of an Ethanol-Water Solution Catalyzed by an Iridium Complex Bearing a Functional Bipyridonate Ligand. ChemCatChem 2018. [DOI: 10.1002/cctc.201800680] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Masato Kuwahara
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Masaaki Nishioka
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Masato Yoshida
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Ken-ichi Fujita
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
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Fujita K, Yonekura S, Nishikawa S, Niiyama R, Kuniyoshi Y. Environmental and Structural Effects on Physical Reservoir Computing with Tensegrity. ACTA ACUST UNITED AC 2018. [DOI: 10.12792/jiiae.6.92] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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37
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Fujita KI, Furukawa S, Morishima N, Shimizu M, Yamaguchi R. N-Alkylation of Aqueous Ammonia with Alcohols Leading to Primary Amines Catalyzed by Water-Soluble N-Heterocyclic Carbene Complexes of Iridium. ChemCatChem 2018. [DOI: 10.1002/cctc.201702037] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Ken-ichi Fujita
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Shohichi Furukawa
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Namino Morishima
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Mineyuki Shimizu
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Ryohei Yamaguchi
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
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Ellawatty WEA, Masuo Y, Fujita KI, Yamazaki E, Ishida H, Arakawa H, Nakamichi N, Abdelwahed R, Sasaki Y, Kato Y. Organic Cation Transporter 1 Is Responsible for Hepatocellular Uptake of the Tyrosine Kinase Inhibitor Pazopanib. Drug Metab Dispos 2017; 46:33-40. [DOI: 10.1124/dmd.117.076554] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 10/27/2017] [Indexed: 02/06/2023] Open
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Fujita KI, Tamura R, Tanaka Y, Yoshida M, Onoda M, Yamaguchi R. Dehydrogenative Oxidation of Alcohols in Aqueous Media Catalyzed by a Water-Soluble Dicationic Iridium Complex Bearing a Functional N-Heterocyclic Carbene Ligand without Using Base. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02560] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Ken-ichi Fujita
- Graduate School
of Human
and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Ryuichi Tamura
- Graduate School
of Human
and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Yuhi Tanaka
- Graduate School
of Human
and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Masato Yoshida
- Graduate School
of Human
and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Mitsuki Onoda
- Graduate School
of Human
and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Ryohei Yamaguchi
- Graduate School
of Human
and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
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41
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Yamaguchi R, Kobayashi D, Shimizu M, Fujita KI. Synthesis of a series of iridium complexes bearing substituted 2-pyridonates and their catalytic performance for acceptorless dehydrogenation of alcohols under neutral conditions. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.05.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Fujita KI, Wada T, Shiraishi T. Reversible Interconversion between 2,5-Dimethylpyrazine and 2,5-Dimethylpiperazine by Iridium-Catalyzed Hydrogenation/Dehydrogenation for Efficient Hydrogen Storage. Angew Chem Int Ed Engl 2017; 56:10886-10889. [DOI: 10.1002/anie.201705452] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Ken-ichi Fujita
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Tomokatsu Wada
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Takumi Shiraishi
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
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Fujita KI, Wada T, Shiraishi T. Reversible Interconversion between 2,5-Dimethylpyrazine and 2,5-Dimethylpiperazine by Iridium-Catalyzed Hydrogenation/Dehydrogenation for Efficient Hydrogen Storage. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705452] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ken-ichi Fujita
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Tomokatsu Wada
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
| | - Takumi Shiraishi
- Graduate School of Human and Environmental Studies; Kyoto University; Sakyo-ku Kyoto 606-8501 Japan
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Toyomura K, Fujita KI. Synthesis of Coordinatively Unsaturated Iridium Complexes Having Functional 8-Quinolinolato Ligands: New Catalysts for Dehydrogenative Oxidation of Alcohols in Aqueous Media. CHEM LETT 2017. [DOI: 10.1246/cl.170166] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kazuki Toyomura
- Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501
| | - Ken-ichi Fujita
- Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501
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Fujii A, Choi JC, Fujita KI. Synthesis of magnetically recoverable imidazolium hydrogen carbonate and its application as an N-heterocyclic carbene catalyst to cyanosilylation of aldehydes and ketones. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.03.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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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46
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Iida M, Yamada K, Nango Y, Yamaguchi Y, Ogita A, Fujita KI, Tanaka T. Vacuolar H+-ATPase subunit Vma1p functions as the molecular ligand in the vacuole-targeting fungicidal activity of polymyxin B. Microbiology (Reading) 2017; 163:531-540. [DOI: 10.1099/mic.0.000450] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Affiliation(s)
- Maki Iida
- Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Keiichi Yamada
- Department of Chemistry and Chemical Biology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Yoshiya Nango
- Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Yoshihiro Yamaguchi
- Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Akira Ogita
- Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
- Research Center for Urban Health and Sports, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Ken-ichi Fujita
- Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Toshio Tanaka
- Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
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Fujita KI. Delayed elimination of SN-38 in cancer patients with severe renal failure: mechanism and appropriate irinotecan dose. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw479.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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48
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Ohnishi T, Fukamachi K, Ohshima Y, Jiegou X, Ueda S, Iigo M, Takasuka N, Naito A, Fujita KI, Matsuoka Y, Izumi K, Tsuda H. Possible Application of Human c-Ha-ras Proto-Oncogene Transgenic Rats in a Medium-Term Bioassay Model for Carcinogens. Toxicol Pathol 2016; 35:436-43. [PMID: 17474063 DOI: 10.1080/01926230701302541] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
With the aim of developing a medium-term assay for screening of environmental carcinogens, we exposed mammary carcinogen sensitive human c-Ha-ras proto-oncogene transgenic (Hras128) rats to various carcinogens, including compounds that do not normally induce mammary tumors. Seven-week-old Hras128 rats and wild-type littermates received administrations of 3-methylcholanthrene (3-MC), benzo[a]pyrene (B[a]P), anthracene, pyrene, 2-amino-3-methylimidazo[4,5-f]quinoline (IQ), 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx), 4-(methyl-nitrosamino)-1-(3-pyridyl)-1-butanone (NNK), dimethylarsinic acid (DMA), diethylnitrosamine (DEN) or azoxymethane (AOM) and were sacrificed at week 12 (females) (at week 10 for the 3-MC group) or week 20 (males). Female Hras128 rats receiving NNK, DEN, or DMA showed a significant increase in mammary tumor incidence and/or multiplicity compared to the respective values with olive oil or deionized distilled water (DDW) vehicles. In male Hras128 rats, a significant increase in mammary tumors was also observed in groups administered 3-MC, B[a]P, anthracene, IQ, and NNK. Mutations of transgenes were observed in codons 12 and/or 61 in the induced tumors by PCR-RFLP except in the DEN group in female and in the MeIQx group in male Hras128 rats. Thus various carcinogens, not necessarily limited to those normally targeting the breast, were found to induce mammary carcinomas in Hras128 rats, especially in females, pointing to potential use for medium-term screening.
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Affiliation(s)
- Takamasa Ohnishi
- Department of Molecular and Environmental Pathology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
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Fujita KI, Sato J, Fujii A, Onozawa SY, Yasuda H. A Carboxylative Cyclization of Propargylic Amines with Carbon Dioxide Catalyzed by the N-Heterocyclic Carbene 1,3-Di-tert-butylimidazol-2-ylidene (ItBu). ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600114] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ken-ichi Fujita
- National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Junichi Sato
- Graduate School of Science and Engineering; Ibaraki University; 2-1-1 Bunkyo Mito Ibaraki 310-8512 Japan
| | - Akira Fujii
- National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Shun-ya Onozawa
- National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Hiroyuki Yasuda
- National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
- Graduate School of Science and Engineering; Ibaraki University; 2-1-1 Bunkyo Mito Ibaraki 310-8512 Japan
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Affiliation(s)
- Takayuki Hayakawa
- Laboratory
of Applied Clay Technology, Hojun Co., Ltd., An-naka, Gunma 379-0133, Japan
| | - Makoto Minase
- Laboratory
of Applied Clay Technology, Hojun Co., Ltd., An-naka, Gunma 379-0133, Japan
| | - Ken-ichi Fujita
- Laboratory
of Applied Clay Technology, Hojun Co., Ltd., An-naka, Gunma 379-0133, Japan
| | - Makoto Ogawa
- School
of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong 21210, Thailand
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