1
|
Shoji T, Sasahara N, Hamasaki A, Mori S, Okujima T, Sekiguchi R, Ito S. Synthesis, Structural, and Optical Properties of Azuleno[1,2- c]pyran-1-ones: Bro̷nsted Acid-Mediated Cyclization of 2-Azulenylalkynes. J Org Chem 2023. [PMID: 37906944 DOI: 10.1021/acs.joc.3c01742] [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: 11/02/2023]
Abstract
Pyrones and their aromatic ring-fused derivatives have gained significant attention due to their diverse biological activities and potential as foundational frameworks for advanced materials. In this paper, we describe a proficient approach for the preparation of azuleno[1,2-c]pyran-1-ones, which are difficult to produce by using conventional methods. The synthesis was achieved through Bro̷nsted acid-mediated cyclization of 2-azulenylalkynes. The structural and optical properties of azuleno[1,2-c]pyran-1-ones were characterized by single-crystal X-ray analysis, NMR, UV/vis, and fluorescence spectroscopies. Under acidic conditions, these compounds displayed notable spectral alterations and emission, distinct from their spectra in neutral medium. These results suggest that azuleno[1,2-c]pyran-1-ones hold great potential for applications in organic electronic materials and fluorescent pH sensors.
Collapse
Affiliation(s)
- Taku Shoji
- Department of Chemical Biology and Applied Chemistry, College of Engineering, Nihon University, Koriyama 963-8642, Japan
| | - Nichika Sasahara
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Atom Hamasaki
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Shigeki Mori
- Advanced Research Support Center, Ehime University, Matsuyama 790-8577, Japan
| | - Tetsuo Okujima
- Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
| | - Ryuta Sekiguchi
- Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan
| | - Shunji Ito
- Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan
| |
Collapse
|
2
|
Shoji T, Takeuchi M, Uda M, Ariga Y, Yamazaki A, Sekiguchi R, Ito S. Synthesis of Azuleno[2,1- b]quinolones and Quinolines via Brønsted Acid-Catalyzed Cyclization of 2-Arylaminoazulenes. Molecules 2023; 28:5785. [PMID: 37570755 PMCID: PMC10420867 DOI: 10.3390/molecules28155785] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 07/26/2023] [Accepted: 07/26/2023] [Indexed: 08/13/2023] Open
Abstract
Quinolone and quinoline derivatives are frequently found as substructures in pharmaceutically active compounds. In this paper, we describe a procedure for the synthesis of azuleno[2,1-b]quinolones and quinolines from 2-arylaminoazulene derivatives, which are readily prepared via the aromatic nucleophilic substitution reaction of a 2-chloroazulene derivative with several arylamines. The synthesis of azuleno[2,1-b]quinolones was established by the Brønsted acid-catalyzed intramolecular cyclization of 2-arylaminoazulene derivatives bearing two ester groups at the five-membered ring. The halogenative aromatization of azuleno[2,1-b]quinolones with POCl3 yielded azuleno[2,1-b]quinolines with a chlorine substituent at the pyridine moiety. The aromatic nucleophilic substitution reaction of azuleno[2,1-b]quinolines bearing chlorine substituent with secondary amines was also investigated to afford the aminoquinoline derivatives. These synthetic methodologies reported in this paper should be valuable in the development of new pharmaceuticals based on the azulene skeleton.
Collapse
Affiliation(s)
- Taku Shoji
- Department of Chemical Biology and Applied Chemistry, College of Engineering, Nihon University, Koriyama 963-8642, Japan
| | - Mutsumi Takeuchi
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Mayumi Uda
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Yukino Ariga
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Akari Yamazaki
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Ryuta Sekiguchi
- Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan; (R.S.); (S.I.)
| | - Shunji Ito
- Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan; (R.S.); (S.I.)
| |
Collapse
|
3
|
Shoji T, Sakata N, Ariga Y, Yamazaki A, Katoh R, Okujima T, Sekiguchi R, Ito S. Construction of a 2,2'-biazulene framework via Brønsted acid-promoted annulation of 2,3-di(1-azulenyl)benzofurans. Chem Commun (Camb) 2023; 59:3447-3450. [PMID: 36857723 DOI: 10.1039/d3cc00373f] [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: 02/25/2023]
Abstract
Dibenzofurans featuring a 2,2'-biazulene framework were prepared in good yields by Brønsted acid-promoted annulation of 2,3-di(1-azulenyl)benzofurans in 100% H3PO4. NMR, UV-Vis, and fluorescence spectroscopies were used to investigate the structural and optical properties of the products prepared. Remarkably, the annulated products exhibited fluorescence, with the longest wavelength of azulene derivatives reported to date, which extended into the near-infrared region under acidic conditions.
Collapse
Affiliation(s)
- Taku Shoji
- Department of Chemical Biology and Applied Chemistry, College of Engineering, Nihon University, Koriyama 963-8642, Fukushima, Japan. .,Department of Material Science, Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Nagano, Japan
| | - Naoko Sakata
- Department of Material Science, Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Nagano, Japan
| | - Yukino Ariga
- Department of Material Science, Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Nagano, Japan
| | - Akari Yamazaki
- Department of Material Science, Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Nagano, Japan
| | - Ryuzi Katoh
- Department of Chemical Biology and Applied Chemistry, College of Engineering, Nihon University, Koriyama 963-8642, Fukushima, Japan.
| | - Tetsuo Okujima
- Department of Chemistry and Biology, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Ehime, Japan
| | - Ryuta Sekiguchi
- Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Aomori, Japan
| | - Shunji Ito
- Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Aomori, Japan
| |
Collapse
|
4
|
Abstract
We have developed methods to achieve efficient CRISPR-Cas9-mediated gene knockout in ex vivo mouse embryonic salivary epithelial explants. Salivary epithelial explants provide a valuable model for characterizing cell signaling, differentiation, and epithelial morphogenesis, but research has been limited by a paucity of efficient gene perturbation methods. Here, we demonstrate highly efficient gene perturbation by transient transduction of guide RNA-expressing lentiviruses into Cas9-expressing salivary epithelial buds isolated from Cas9 transgenic mice. We first show that salivary epithelial explants can be cultured in low-concentration, nonsolidified Matrigel suspensions in 96-well plates, which greatly increases sample throughput compared to conventional cultures embedded in solidified Matrigel. We further show that salivary epithelial explants can grow and branch with FGF7 alone, while supplementing with insulin, transferrin, and selenium (ITS) enhances growth and branching. We then describe an efficient workflow to produce experiment-ready, high-titer lentiviruses within 1 wk after molecular cloning. To track transduced cells, we designed the lentiviral vector to coexpress a nuclear fluorescent reporter with the guide RNA. We routinely achieved 80% transduction efficiency when antibiotic selection was used. Importantly, we detected robust loss of targeted protein products when testing 9 guide RNAs for 3 different genes. Moreover, targeting the β1 integrin gene (Itgb1) inhibited branching morphogenesis, which supports the importance of cell-matrix adhesion in driving branching morphogenesis. In summary, we have established a lentivirus-based method that can efficiently perturb genes of interest in salivary epithelial explants, which will greatly facilitate studies of specific gene functions using this system.
Collapse
Affiliation(s)
- R. Sekiguchi
- Cell Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - M.M. Mehlferber
- Cell Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
- Present address: Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA, USA
| | - K. Matsumoto
- Cell Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - S. Wang
- Cell Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
- Present address: 4D Cellular Physiology, Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA
| |
Collapse
|
5
|
Shoji T, Uda M, Okujima T, Sekiguchi R, Ito S. Synthesis of Maleimide-Fused Aceheptylenes from Guaiazulene. HETEROCYCLES 2023. [DOI: 10.3987/com-23-14826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
|
6
|
Shoji T, Takagaki S, Ariga Y, Yamazaki A, Takeuchi M, Ohta A, Sekiguchi R, Mori S, Okujima T, Ito S. Molecular Transformation to Pyrroles, Pentafulvenes, and Pyrrolopyridines by [2+2] Cycloaddition of Propargylamines with Tetracyanoethylene. Chemistry 2020; 26:1931-1935. [DOI: 10.1002/chem.201904926] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 11/14/2019] [Indexed: 12/28/2022]
Affiliation(s)
- Taku Shoji
- Department of Material Science Graduate School of, Science and Technology Shinshu University Matsumoto 390-8621 Nagano Japan
| | - Sho Takagaki
- Department of Material Science Graduate School of, Science and Technology Shinshu University Matsumoto 390-8621 Nagano Japan
| | - Yukino Ariga
- Department of Material Science Graduate School of, Science and Technology Shinshu University Matsumoto 390-8621 Nagano Japan
| | - Akari Yamazaki
- Department of Material Science Graduate School of, Science and Technology Shinshu University Matsumoto 390-8621 Nagano Japan
| | - Mutsumi Takeuchi
- Department of Material Science Graduate School of, Science and Technology Shinshu University Matsumoto 390-8621 Nagano Japan
| | - Akira Ohta
- Department of Material Science Graduate School of, Science and Technology Shinshu University Matsumoto 390-8621 Nagano Japan
| | - Ryuta Sekiguchi
- Department of Material Science Graduate School of, Science and Technology Shinshu University Matsumoto 390-8621 Nagano Japan
| | - Shigeki Mori
- Advanced Research Support Center Ehime University Matsuyama 790-8577 Ehime Japan
| | - Tetsuo Okujima
- Department of Chemistry and Biology Graduate School of, Science and Engineering Ehime University Matsuyama 790-8577 Ehime Japan
| | - Shunji Ito
- Graduate School of Science and Technology Hirosaki University Hirosaki 036-8561 Aomori Japan
| |
Collapse
|
7
|
Shoji T, Iida N, Yamazaki A, Ariga Y, Ohta A, Sekiguchi R, Nagahata T, Nagasawa T, Ito S. Synthesis of phthalimides cross-conjugated with an azulene ring, and their structural, optical and electrochemical properties. Org Biomol Chem 2020; 18:2274-2282. [PMID: 32150201 DOI: 10.1039/d0ob00164c] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The preparation of phthalimides cross-conjugated with an azulene ring was established by a one-pot Diels-Alder reaction of the corresponding 2-aminofuran derivatives with several maleimides, without the isolation of the intermediately formed [4 + 2] cycloadducts. The structure, optical and electrochemical properties of the novel phthalimide derivatives were clarified by single-crystal X-ray analysis, UV/Vis and fluorescence spectra, spectroelectrochemistry and voltammetry experiments, and theoretical calculations. These results indicated that the substituents on the azulene ring greatly affect the optical and electrochemical properties of the molecules.
Collapse
Affiliation(s)
- Taku Shoji
- Graduate School of Science and Technology, Shinshu University, Matsumoto, 390-8621, Nagano, Japan.
| | - Nanami Iida
- Graduate School of Science and Technology, Shinshu University, Matsumoto, 390-8621, Nagano, Japan.
| | - Akari Yamazaki
- Graduate School of Science and Technology, Shinshu University, Matsumoto, 390-8621, Nagano, Japan.
| | - Yukino Ariga
- Graduate School of Science and Technology, Shinshu University, Matsumoto, 390-8621, Nagano, Japan.
| | - Akira Ohta
- Graduate School of Science and Technology, Shinshu University, Matsumoto, 390-8621, Nagano, Japan.
| | - Ryuta Sekiguchi
- Graduate School of Science and Technology, Shinshu University, Matsumoto, 390-8621, Nagano, Japan.
| | - Tatsuki Nagahata
- Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Aomori, Japan
| | - Takuya Nagasawa
- Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Aomori, Japan
| | - Shunji Ito
- Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Aomori, Japan
| |
Collapse
|
8
|
Abstract
Branching organs, including the salivary and mammary glands, lung, and kidney, arise as epithelial buds that are morphologically very similar. However, the mesenchyme is known to guide epithelial morphogenesis and to help govern cell fate and eventual organ specificity. We performed single-cell transcriptome analyses of 14,441 cells from embryonic day 12 submandibular and parotid salivary glands to characterize their molecular identities during bud initiation. The mesenchymal cells were considerably more heterogeneous by clustering analysis than the epithelial cells. Nonetheless, distinct clusters were evident among even the epithelial cells, where unique molecular markers separated presumptive bud and duct cells. Mesenchymal cells formed separate, well-defined clusters specific to each gland. Neuronal and muscle cells of the 2 glands in particular showed different markers and localization patterns. Several gland-specific genes were characteristic of different rhombomeres. A muscle cluster was prominent in the parotid, which was not myoepithelial or vascular smooth muscle. Instead, the muscle cluster expressed genes that mediate skeletal muscle differentiation and function. Striated muscle was indeed found later in development surrounding the parotid gland. Distinct spatial localization patterns of neuronal and muscle cells in embryonic stages appear to foreshadow later differences in adult organ function. These findings demonstrate that the establishment of transcriptional identities emerges early in development, primarily in the mesenchyme of developing salivary glands. We present the first comprehensive description of molecular signatures that define specific cellular landmarks for the bud initiation stage, when the neural crest-derived ectomesenchyme predominates in the salivary mesenchyme that immediately surrounds the budding epithelium. We also provide the first transcriptome data for the largely understudied embryonic parotid gland as compared with the submandibular gland, focusing on the mesenchymal cell populations.
Collapse
Affiliation(s)
- R Sekiguchi
- Cell Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - D Martin
- Genomics and Computational Biology Core, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | -
- National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - K M Yamada
- Cell Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| |
Collapse
|
9
|
Shoji T, Sugiyama S, Takeuchi M, Ohta A, Sekiguchi R, Ito S, Yatsu T, Okujima T, Yasunami M. Synthesis of 6-Amino- and 6-Arylazoazulenes via Nucleophilic Aromatic Substitution and Their Reactivity and Properties. J Org Chem 2019; 84:1257-1275. [DOI: 10.1021/acs.joc.8b02648] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Taku Shoji
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Shuhei Sugiyama
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Mutsumi Takeuchi
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Akira Ohta
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Ryuta Sekiguchi
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Shunji Ito
- Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan
| | - Tomoaki Yatsu
- Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan
| | - Tetsuo Okujima
- Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
| | - Masafumi Yasunami
- Department of Chemical Biology and Applied Chemistry, College of Engineering, Nihon University, Koriyama 963-8642, Japan
| |
Collapse
|
10
|
Shoji T, Araki T, Iida N, Miura K, Ohta A, Sekiguchi R, Ito S, Okujima T. Synthesis of azulenophthalimides by phosphine-mediated annulation of 1,2-diformylazulenes with maleimides. Org Chem Front 2019. [DOI: 10.1039/c8qo01121d] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The reaction of 1,2-diformylazulene with maleimides in the presence of PPh3 gave the azulenophthalimides. The optical and electrochemical properties of the azulenophthalimides were investigated.
Collapse
Affiliation(s)
- Taku Shoji
- Graduate School of Science and Technology
- Shinshu University
- Nagano
- Japan
| | - Takanori Araki
- Graduate School of Science and Technology
- Shinshu University
- Nagano
- Japan
| | - Nanami Iida
- Graduate School of Science and Technology
- Shinshu University
- Nagano
- Japan
| | - Kota Miura
- Graduate School of Science and Technology
- Shinshu University
- Nagano
- Japan
| | - Akira Ohta
- Graduate School of Science and Technology
- Shinshu University
- Nagano
- Japan
| | - Ryuta Sekiguchi
- Graduate School of Science and Technology
- Shinshu University
- Nagano
- Japan
| | - Shunji Ito
- Graduate School of Science and Technology
- Hirosaki University
- Hirosaki 036-8561
- Japan
| | - Tetsuo Okujima
- Department of Chemistry and Biology
- Graduate School of Science and Engineering
- Ehime University
- Matsuyama 790-8577
- Japan
| |
Collapse
|
11
|
Shoji T, Miura K, Ohta A, Sekiguchi R, Ito S, Endo Y, Nagahata T, Mori S, Okujima T. Synthesis of azuleno[2,1-b]thiophenes by cycloaddition of azulenylalkynes with elemental sulfur and their structural, optical and electrochemical properties. Org Chem Front 2019. [DOI: 10.1039/c9qo00593e] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of several azulenylalkynes having an aryl substituent with elemental sulfur afforded the corresponding azuleno[2,1-b]thiophenes in good yields.
Collapse
Affiliation(s)
- Taku Shoji
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Kota Miura
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Akira Ohta
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Ryuta Sekiguchi
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Shunji Ito
- Graduate School of Science and Technology
- Hirosaki University
- Hirosaki 036-8561
- Japan
| | - Yuya Endo
- Graduate School of Science and Technology
- Hirosaki University
- Hirosaki 036-8561
- Japan
| | - Tatsuki Nagahata
- Graduate School of Science and Technology
- Hirosaki University
- Hirosaki 036-8561
- Japan
| | - Shigeki Mori
- Advanced Research Support Center
- Ehime University
- Matsuyama 790-8577
- Japan
| | - Tetsuo Okujima
- Department of Chemistry and Biology
- Graduate School of Science and Engineering
- Ehime University
- Matsuyama 790-8577
- Japan
| |
Collapse
|
12
|
Abstract
A highly flexible carbon nanohoop composed of HBC panels was prepared by connection together with biphenylene spacers.
Collapse
Affiliation(s)
- Yuta Nakagawa
- Graduate School of Science and Technology
- Hirosaki University
- Hirosaki
- Japan
| | - Ryuta Sekiguchi
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Jun Kawakami
- Graduate School of Science and Technology
- Hirosaki University
- Hirosaki
- Japan
| | - Shunji Ito
- Graduate School of Science and Technology
- Hirosaki University
- Hirosaki
- Japan
| |
Collapse
|
13
|
Kogawa C, Fujiwara A, Sekiguchi R, Shoji T, Kawakami J, Okazaki M, Ito S. Synthesis and photophysical properties of azuleno[1′,2′:4,5]pyrrolo[2,1-b]quinazoline-6,14-diones: Azulene analogs of tryptanthrin. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.10.020] [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] [Indexed: 11/30/2022]
|
14
|
Shoji T, Miura K, Araki T, Maruyama A, Ohta A, Sekiguchi R, Ito S, Okujima T. Synthesis of 2-Methyl-1-azulenyl Tetracyanobutadienes and Dicyanoquinodimethanes: Substituent Effect of 2-Methyl Moiety on the Azulene Ring toward the Optical and Electrochemical Properties. J Org Chem 2018; 83:6690-6705. [DOI: 10.1021/acs.joc.8b01067] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Taku Shoji
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Kota Miura
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Takanori Araki
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Akifumi Maruyama
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Akira Ohta
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Ryuta Sekiguchi
- Graduate School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Shunji Ito
- Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan
| | - Tetsuo Okujima
- Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
| |
Collapse
|
15
|
Shoji T, Araki T, Iida N, Kobayashi Y, Ohta A, Sekiguchi R, Ito S, Mori S, Okujima T, Yasunami M. Molecular Transformation of 2-Methylazulenes: An Efficient and Practical Synthesis of 2-Formyl- and 2-Ethynylazulenes. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701746] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Taku Shoji
- Department of Materials Science; Graduate School of Science and Technology; Shinshu University; 390-8621 Matsumoto Nagano Japan
| | - Takanori Araki
- Department of Materials Science; Graduate School of Science and Technology; Shinshu University; 390-8621 Matsumoto Nagano Japan
| | - Nanami Iida
- Department of Materials Science; Graduate School of Science and Technology; Shinshu University; 390-8621 Matsumoto Nagano Japan
| | - Yoshiaki Kobayashi
- Department of Materials Science; Graduate School of Science and Technology; Shinshu University; 390-8621 Matsumoto Nagano Japan
| | - Akira Ohta
- Department of Materials Science; Graduate School of Science and Technology; Shinshu University; 390-8621 Matsumoto Nagano Japan
| | - Ryuta Sekiguchi
- Department of Materials Science; Graduate School of Science and Technology; Shinshu University; 390-8621 Matsumoto Nagano Japan
| | - Shunji Ito
- Graduate School of Science and Technology; Hirosaki University; 036-8561 Hirosaki Aomori Japan
| | - Shigeki Mori
- Advanced Research Support Center; Ehime University; 790-8577 Matsuyama Ehime Japan
| | - Tetsuo Okujima
- Department of Chemistry and Biology; Ehime University; 790-8577 Matsuyama Ehime Japan
| | - Masafumi Yasunami
- Department of Chemical Biology and Applied Chemistry; College of Engineering; Nihon University; 963-8642 Koriyama Fukushima Japan
| |
Collapse
|
16
|
Shoji T, Sugiyama S, Miura K, Ohta A, Sekiguchi R, Ito S, Mori S. Synthesis of 2-Amino-1-cyanoazulenes: Substituent Effect on 2H-Cyclohepta[b]furan-2-ones toward the Reaction with Malononitrile. HETEROCYCLES 2018. [DOI: 10.3987/com-18-s(t)89] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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]
|
17
|
Shoji T, Tanaka M, Takagaki S, Miura K, Ohta A, Sekiguchi R, Ito S, Mori S, Okujima T. Synthesis of azulene-substituted benzofurans and isocoumarins via intramolecular cyclization of 1-ethynylazulenes, and their structural and optical properties. Org Biomol Chem 2018; 16:480-489. [PMID: 29270584 DOI: 10.1039/c7ob02861j] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The preparation of azulene-substituted benzofurans and isocoumarins was established by two types of intramolecular cyclization reaction of 1-ethynylazulenes.
Collapse
Affiliation(s)
- Taku Shoji
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Miwa Tanaka
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Sho Takagaki
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Kota Miura
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Akira Ohta
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Ryuta Sekiguchi
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Shunji Ito
- Graduate School of Science and Technology
- Hirosaki University
- Hirosaki 036-8561
- Japan
| | - Shigeki Mori
- Advanced Research Support Center
- Ehime University
- Matsuyama 790-8577
- Japan
| | - Tetsuo Okujima
- Department of Chemistry and Biology
- Graduate School of Science and Engineering
- Ehime University
- Matsuyama 790-8577
- Japan
| |
Collapse
|
18
|
Ito S, Sekiguchi R, Mizushima A, Kudo K, Kawakami J, Shoji T. Cyanine–cyanine hybrid structure as a stabilized polyelectrochromic system: synthesis, stabilities, and redox behavior of di(1-azulenyl)methylium units connected with electron-accepting π-electron systems. ARKIVOC 2017. [DOI: 10.24820/ark.5550190.p010.163] [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: 11/23/2022] Open
|
19
|
Shoji T, Sugiyama S, Araki T, Ohta A, Sekiguchi R, Ito S, Mori S, Okujima T, Yasunami M. Synthesis of 2-amino- and 2-arylazoazulenes via nucleophilic aromatic substitution of 2-chloroazulenes with amines and arylhydrazines. Org Biomol Chem 2017; 15:3917-3923. [PMID: 28426084 DOI: 10.1039/c7ob00691h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The SNAr reaction of 2-chloroazulene derivative 1 with ethoxycarbonyl groups at the 1,3-positions of the azulene ring with several amines afforded the corresponding 2-aminoazulenes 3-9 in excellent yields. 2-Chloroazulene (2) without the electron-withdrawing groups reacted with highly nucleophilic cyclic amines (i.e., morpholine, piperidine and pyrrolidine) under the high-temperature conditions in a sealed tube to produce the corresponding 2-aminoazulenes 10-12 in good yields. 2-Aminoazulenes 10-14 without the electron-withdrawing groups were also obtained in good yields by the treatment of compounds 3-7 with 100% H3PO4, but in the cases of the reaction of 8 and 9 with a secondary amine function, the decomposition of the products resulted. The synthesis of 2-arylazoazulenes 15-18 was also established via the SNAr reaction of 1 with arylhydrazines. The optical and electrochemical properties of the 2-arylazoazulene derivatives were examined by UV/Vis spectroscopy, theoretical calculations and voltammetric experiments.
Collapse
Affiliation(s)
- Taku Shoji
- Graduate School of Science and Technology, Shinshu University, Matsumoto, 390-8621, Nagano, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Shoji T, Nagai D, Tanaka M, Araki T, Ohta A, Sekiguchi R, Ito S, Mori S, Okujima T. Synthesis of 2-Aminofurans by Sequential [2+2] Cycloaddition-Nucleophilic Addition of 2-Propyn-1-ols with Tetracyanoethylene and Amine-Induced Transformation into 6-Aminopentafulvenes. Chemistry 2017; 23:5126-5136. [DOI: 10.1002/chem.201700121] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Indexed: 01/07/2023]
Affiliation(s)
- Taku Shoji
- Department of Material Science; Graduate School of Science and Technology; Shinshu University, Matsumoto; 390-8621 Nagano Japan
| | - Daichi Nagai
- Department of Material Science; Graduate School of Science and Technology; Shinshu University, Matsumoto; 390-8621 Nagano Japan
| | - Miwa Tanaka
- Department of Material Science; Graduate School of Science and Technology; Shinshu University, Matsumoto; 390-8621 Nagano Japan
| | - Takanori Araki
- Department of Material Science; Graduate School of Science and Technology; Shinshu University, Matsumoto; 390-8621 Nagano Japan
| | - Akira Ohta
- Department of Material Science; Graduate School of Science and Technology; Shinshu University, Matsumoto; 390-8621 Nagano Japan
| | - Ryuta Sekiguchi
- Graduate School of Science and Technology; Hirosaki University, Hirosaki; 036-8561 Aomori Japan
| | - Shunji Ito
- Graduate School of Science and Technology; Hirosaki University, Hirosaki; 036-8561 Aomori Japan
| | - Shigeki Mori
- Advanced Research Support Center; Ehime University, Matsuyama; 790-8577 Ehime Japan
| | - Tetsuo Okujima
- Department of Chemistry and Biology; Graduate School of Science and Engineering; Ehime University, Matsuyama; 790-8577 Ehime Japan
| |
Collapse
|
21
|
Shoji T, Araki T, Sugiyama S, Ohta A, Sekiguchi R, Ito S, Okujima T, Toyota K. Synthesis of 2-Azulenyltetrathiafulvalenes by Palladium-Catalyzed Direct Arylation of 2-Chloroazulenes with Tetrathiafulvalene and Their Optical and Electrochemical Properties. J Org Chem 2017; 82:1657-1665. [DOI: 10.1021/acs.joc.6b02818] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Taku Shoji
- Graduate
School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Takanori Araki
- Graduate
School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Shuhei Sugiyama
- Graduate
School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Akira Ohta
- Graduate
School of Science and Technology, Shinshu University, Matsumoto 390-8621, Japan
| | - Ryuta Sekiguchi
- Graduate
School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan
| | - Shunji Ito
- Graduate
School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan
| | - Tetsuo Okujima
- Department
of Chemistry and Biology, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
| | - Kozo Toyota
- Department
of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| |
Collapse
|
22
|
Shoji T, Takagaki S, Tanaka M, Araki T, Sugiyama S, Sekiguchi R, Ohta A, Ito S, Okujima T. Synthesis of Azulene-Substituted Tetraarylpyrroles by Reaction of 1-Azulenyl Ketones with Benzoin and Ammonium Acetate. HETEROCYCLES 2017. [DOI: 10.3987/com-17-13781] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
23
|
Shoji T, Maruyama M, Maruyama A, Nagai D, Tanaka M, Sekiguchi R, Ito S, Okujima T. Synthesis and Electrochemical Properties of Azulene-Substituted Tetracyanobutadiene and Dicyanoquinodimethane Chromophores Connected with Naphthalene Cores. HETEROCYCLES 2017. [DOI: 10.3987/com-16-s(s)25] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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]
|
24
|
Sekiguchi R, Kudo S, Kawakami J, Sakai A, Ikeda H, Nakamura H, Ohta K, Ito S. Preparation of a Cyclic Polyphenylene Array for a Chiral-Type Carbon Nanotube Segment. BCSJ 2016. [DOI: 10.1246/bcsj.20160145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
25
|
Takayasu K, Aoki K, Ichikawa T, Ohmura T, Sekiguchi R, Terauchi T, Takayama T. Aberrant Right Gastric Vein Directly Communicating with Left Portal Vein System. Acta Radiol 2016. [DOI: 10.1177/028418519003100608] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In 3 patients with primary hepatic malignancies, a communication between the right gastric vein and the left portal vein system was recognized at angiography. The right gastric vein entered directly into the left lateral portal veins in 2 patients and into the left medial portal veins in one. Portal angio-CT performed in one patient demonstrated a specific defect only in the left lateral superior area of the liver, consistent with the segmental opacification of the portal vein branch recognized on the angiogram. This rare communication was seen in 3 (1.5%) of 200 consecutive patients who underwent celiac angiography and is most likely an anomaly in which the right gastric vein directly enters the left portal vein instead of the portal vein trunk. When interpreting a filling defect not associated with a mass lesion on portal angio-CT for hepatic neoplasms or the right gastric vein communicating with the left portal vein system on the angiogram, this particular anomaly should be considered.
Collapse
|
26
|
Shoji T, Miyashita K, Araki T, Tanaka M, Maruyama A, Sekiguchi R, Ito S, Okujima T. Synthesis of 1,2′-Biazulenes by Palladium-Catalyzed Unusual Homocoupling Reaction of 1-Haloazulenes in the Presence of Ferrocene. SYNTHESIS-STUTTGART 2016. [DOI: 10.1055/s-0035-1561418] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Taku Shoji
- Department of Chemistry, Faculty School of Science, Shinshu University
| | - Kanami Miyashita
- Department of Chemistry, Faculty School of Science, Shinshu University
| | - Takanori Araki
- Department of Chemistry, Faculty School of Science, Shinshu University
| | - Miwa Tanaka
- Department of Chemistry, Faculty School of Science, Shinshu University
| | - Akifumi Maruyama
- Department of Material Science, Graduate School of Science and Technology, Shinshu University
| | - Ryuta Sekiguchi
- Graduate School of Science and Technology, Hirosaki University
| | - Shunji Ito
- Graduate School of Science and Technology, Hirosaki University
| | - Tetsuo Okujima
- Department of Chemistry and Biology, Graduate School of Science and Engineering, Ehime University
| |
Collapse
|
27
|
Shoji T, Tanaka M, Araki T, Takagaki S, Sekiguchi R, Ito S. Synthesis of 1-azulenyl ketones by Brønsted acid mediated hydration of 1-azulenylalkynes. RSC Adv 2016. [DOI: 10.1039/c6ra20010a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Preparation of 1-azulenyl ketones was achieved by metal-free hydration of 1-azulenylalkynes with trifluoroacetic acid in good to excellent yields. In the cases of the reaction of alkyne 1m, isocoumarin congener 4 was obtained in excellent yield.
Collapse
Affiliation(s)
- Taku Shoji
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto 390-8621
- Japan
| | - Miwa Tanaka
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto 390-8621
- Japan
| | - Takanori Araki
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto 390-8621
- Japan
| | - Sho Takagaki
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto 390-8621
- Japan
| | - Ryuta Sekiguchi
- Graduate School of Science and Technology
- Hirosaki University
- Hirosaki 036-8561
- Japan
| | - Shunji Ito
- Graduate School of Science and Technology
- Hirosaki University
- Hirosaki 036-8561
- Japan
| |
Collapse
|
28
|
Sekiguchi R, Takahashi K, Kawakami J, Sakai A, Ikeda H, Ishikawa A, Ohta K, Ito S. Preparation of a Cyclic Polyphenylene Array for a Zigzag-Type Carbon Nanotube Segment. J Org Chem 2015; 80:5092-110. [DOI: 10.1021/acs.joc.5b00485] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ryuta Sekiguchi
- Graduate
School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan
| | - Kei Takahashi
- Graduate
School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan
| | - Jun Kawakami
- Graduate
School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan
| | | | | | - Aya Ishikawa
- Smart
Material Science and Technology, Interdisciplinary Graduate School
of Science and Technology, Shinshu University, Ueda 386-8567, Japan
| | - Kazuchika Ohta
- Smart
Material Science and Technology, Interdisciplinary Graduate School
of Science and Technology, Shinshu University, Ueda 386-8567, Japan
| | - Shunji Ito
- Graduate
School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan
| |
Collapse
|
29
|
Kumagai T, Imamura F, Atagi S, Takeda K, Sekiguchi R, Enatsu S, Nakagawa K, Tamura T. Post-Marketing Clinical Study of Pemetrexed (PEM) Combined with Carboplatin (CBDCA) Followed by Maintenance PEM in Patients with Non-Squamous Non-Small Cell Lung Cancer (non-sq NSCLC): 18-Month Follow-up Data. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32003-2] [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] [Indexed: 11/25/2022] Open
|
30
|
Nogami N, Sekiguchi R, Enatsu S, Nakagawa K, Tamura T. Pemetrexed (PEM) Combination Therapy with Carboplatin (CB) Followed by Pem Maintenance in Japanese Patients (PTS) with Nonsquamous Non-Small Cell Lung Cancer (NSCLC): Subgroup Analysis of Elderly Pts. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)33759-5] [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: 11/29/2022] Open
|
31
|
Hosomi Y, Satouchi M, Mori K, Enatsu S, Sekiguchi R, Tominaga K, Nakagawa K, Tamura T. 9128 POSTER Prospective Multicenter Study of Pemetrexed and Carboplatin Combination Followed by Maintenance Pemetrexed in Chemo-nai've Patients With Non-squamous Non-small Cell Lung Cancer. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)72440-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
32
|
Sekine I, Kubota K, Niho S, Sumi M, Nihei K, Sekiguchi R, Funai J, Enatsu S, Ohe Y, Tamura T. 9060 POSTER Phase I Trial of Pemetrexed and Cisplatin Combination Chemotherapy With Concurrent Thoracic Radiotherapy in Japanese Patients With Locally Advanced Non-Small-Cell Lung Cancer. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)72372-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
33
|
Tanioka M, Nokihara H, Yamamoto N, Yamada Y, Yamada K, Goto Y, Fujimoto T, Sekiguchi R, Uenaka K, Callies S, Tamura T. Phase I study of LY2181308, an antisense oligonucleotide against survivin, in patients with advanced solid tumors. Cancer Chemother Pharmacol 2010; 68:505-11. [PMID: 21079959 DOI: 10.1007/s00280-010-1506-7] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [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: 07/15/2010] [Accepted: 10/26/2010] [Indexed: 12/20/2022]
Abstract
PURPOSE LY2181308 is an antisense oligonucleotide that complementarily binds to survivin mRNA and inhibits its expression in tumor tissue. This phase I dose escalation study evaluated the tolerability, pharmacokinetics, and anticancer activity of LY2181308 in Japanese. METHODS Patients with solid tumors refractory to standard therapy received LY2181308 (400, 600, or 750 mg) as a 3-h intravenous infusion for 3 consecutive days and thereafter once a week. RESULTS LY2181308 was administered to 14 patients, aged 44-73 (median 60) years. Flu-like syndrome, prolonged prothrombin time-international normalized ratio (PT-INR), thrombocytopenia, and fatigue were common reversible grade 1/2 toxicities. The dose-limiting toxicity was reversible grade 3 elevation of ALT/AST/γ-GTP in 1 patient treated at the 750-mg dose. Pharmacokinetic analysis showed a long terminal half-life of 21 days and an extensive tissue distribution of LY2181308. In 12 evaluable patients, one patient had stable disease, while the remaining 11 patients had progressive disease. CONCLUSIONS LY2181308 monotherapy is well tolerated up to 750 mg with a manageable toxicity, the pharmacokinetic profile warrants further evaluation of LY2181308 in combination with cytotoxic agents or radiotherapy.
Collapse
Affiliation(s)
- M Tanioka
- Division of Internal Medicine, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Watanabe M, Yamamoto T, Arakawa K, Imai J, Sekiguchi R, Enatsu S, Nambu Y. Safety and effectiveness of malignant pleural mesothelioma patients treated with pemetrexed: A postmarketing drug registered study under performance linked access system. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e19084] [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: 11/20/2022] Open
Abstract
e19084 Background: Approximately 1000 patients are newly diagnosed as malignant pleural mesothelioma (MPM) each year in Japan, however MPM patient profile and their outcome are not well understood. Pemetrexed is the only approved chemotherapeutic agent for MPM. Limited safety information was available at launch of pemetrexed in Japan where drug induced interstitial pneumonitis are reported at higher rate than the rest of the world. Therefore postmarketing drug registered study (PDRS) for pemetrexed was conducted in Japan to investigate patient characteristics, adverse events and survival of MPM patients based on a regulatory requirement for approval. Methods: From February 2007 to May 2008, all of histologically proven MPM patients to be treated with pemetrexed were required to register the PDRS in Japan. The observation period was six-months. Supply of pemetrexed was restricted to institutes with experienced medical oncologists based on pre-determined criteria. Results: During the 15-months enrollment period, 948 MPM patients were registered. Until August 3th 2008, data for 437 patients were collected. Among these, 389 were male, 48 female, median of age 65 (35–86). 72.3% patients had a known history of being exposed to asbestos. The treatment regimen mainly consists of 500 mg/m2 of pemetrexed and 75 mg/m2 of cisplatin every 21 days. Median treatment cycle was 3.0. Hematological NCI-CTC Grade ¾ adverse events in laboratory data were hemoglobin decrease 19.9 %, neutropenia 20.1%, thrombocytopenia 7.6%. Serious non-hematological adverse events were nausea 3%, vomiting 3.2%, fatigue 0.2%, constipation 0.2%, diarrhea 0.9%. Pneumotoxicity was found in 1.4%. 152 deaths (34.8%) were observed and six-month survival rate estimated by Kaplan-Meier method was 70.9%. Conclusions: This large size PDRS shows that safety profile of pemetrexed appeared similar to the previous clinical trial without additional safety signal. The study has minimum selection bias and provides useful information to health care professionals on safety and effectiveness of pemetrexed in real clinical setting in Japan. [Table: see text]
Collapse
Affiliation(s)
| | | | | | - J. Imai
- Eli Lilly Japan, Hygo, Japan
| | | | | | | |
Collapse
|
35
|
Kobayashi N, Hirabayashi K, Matsui T, Hirahara Y, Kurihara H, Igarashi S, Ishikawa T, Sekiguchi R. Depressed-type colon cancer in a patient with diverticulosis. Endoscopy 2008; 40 Suppl 2:E44. [PMID: 18300202 DOI: 10.1055/s-2007-966854] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- N Kobayashi
- Department of Diagnostic Imaging, Tochigi Cancer Center, Tochigi, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Kobayashi N, Ishikawa T, Hirabayashi K, Fu KI, Hirahara Y, Yamabe Y, Igarashi S, Sekiguchi R. Education and imaging. Gastrointestinal: intramucosal gastric cancer treated by endoscopic submucosal dissection. J Gastroenterol Hepatol 2008; 23:500. [PMID: 18318828 DOI: 10.1111/j.1440-1746.2008.05337.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- N Kobayashi
- Department of Diagnostic Imaging, Tochigi Cancer Center, Tochigi, Japan
| | | | | | | | | | | | | | | |
Collapse
|
37
|
Kobayashi N, Ishikawa T, Fu KI, Yamamoto T, Hirahara Y, Sekiguchi R. Abnormal serum liver chemistry related to pneumoperitoneum after endoscopic submucosal dissection. Endoscopy 2007; 39 Suppl 1:E327. [PMID: 18273778 DOI: 10.1055/s-2007-966818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- N Kobayashi
- Department of Diagnostic Imaging, Tochigi Cancer Center, Tochigi, Japan.
| | | | | | | | | | | |
Collapse
|
38
|
Nasu K, Kuroki Y, Nawano S, Murakami K, Kuroki S, Sekiguchi R, Hayashi T, Umeda T. Thoracic cage extent of melorheostosis depicted by multislice CT. Skeletal Radiol 2002; 31:464-6. [PMID: 12172594 DOI: 10.1007/s00256-002-0541-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2002] [Revised: 03/26/2002] [Accepted: 05/15/2002] [Indexed: 02/02/2023]
Abstract
The ribs and vertebrae are rarely affected by melorheostosis. We present a case of melorheostosis of the ribs and thoracic vertebrae, in which multislice computed tomography (CT) was useful in depicting its extent and defining its sclerotome distribution.
Collapse
Affiliation(s)
- K Nasu
- National Cancer Center Hospital East, Department of Radiology, 1-8-1 Kashiwanoha, Kashiwa, Chiba, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Sekiguchi R, Nawano S, Satake M, Hayashi T, Murakami K, Nasu K, Nishiwaki Y. [Multislice CT of the thorax: effects of contrast material pushed with saline solution using a dual power injector on contrast material dose and perivenous artifacts]. Nihon Igaku Hoshasen Gakkai Zasshi 2001; 61:484-90. [PMID: 11577433] [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: 02/21/2023]
Abstract
A new method of power injection of contrast material flushed with saline solution for thoracic multislice CT using a dual power injector was evaluated in 105 patients. The patients were categorized into 3 groups of 35 patients each, according to the protocol of contrast material administration: (1) 100 mL of non-ionic contrast material(300 mgI/mL), (2) 75 mL of the same contrast material, and (3) 75 mL of the same contrast material flushed with 30 mL of saline solution. Scanning was performed in a caudal-to-cranial direction. Mean attenuation for the three protocols was measured in the superior vena cava, pulmonary trunk, ascending aorta, and descending aorta. Vascular opacification and perivenous artifacts were graded using four-point scoring by a consensus panel of three blinded radiologists. Intravenous injection of 75 mL of contrast material flushed with saline solution provided significantly better vascular opacification in the superior vena cava(p < 0.001) and pulmonary trunk(p < 0.02) than that provided by a 75 mL or 100 mL injection of contrast material alone. A similar degree of enhancement was observed in the ascending and descending aorta. Further, perivenous artifacts in the subclavian vein were significantly reduced (p < 0.05).
Collapse
|
40
|
Mizushima H, Uchiyama E, Nagata H, Matsuno Y, Sekiguchi R, Ohmatsu H, Hojo F, Shimoda T, Wakao F, Shinkai T, Yamaguchi N, Moriyama N, Kakizoe T, Abe K, Terada M. Japanese experience of telemedicine in oncology. Int J Med Inform 2001; 61:207-15. [PMID: 11311674 DOI: 10.1016/s1386-5056(01)00142-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We started telemedicine projects from 1990 with a telepathology system within Tsukiji Campus of National Cancer Center. In 1994, we connected Tsukiji Campus and Kashiwa Campus by 6 Mbps optical fiber leased line using IP protocol for data transmission, for teleconference, telepathology, and teleradiology projects. We also started connection of regional cancer centers and are now forming a cancer center network of 14 cancer centers. We are at present organizing 130 teleconferences per year with an attendance of more than 16000 people as summary. We have also used a high-resolution image transferring system, such as SHD (2000 pixelsx2000 pixels resolution) system on one side, and an economical telemedicine system using JAVA and a WWW browser (NCC_image) on the other side. We think that providing information is another field of telemedicine. We began the experimental gopher and WWW service in 1993. We are now providing official up-to-date cancer information for patients and healthcare professionals. We are getting more than 400000 hits per month. We are also providing a teleconference video session which is held every week on the Internet using a Real Video system with synchronized slide presentation on the WWW browser. We are also organizing a Cancer Image Reference Database System including DICOM images with viewer software. This paper is a summary of the telemedicine projects performed at the National Cancer Center.
Collapse
Affiliation(s)
- H Mizushima
- Cancer Information and Epidemiology Division, National Cancer Center Research Institute, 5-1-1 Tsukiji Chuo-ku, 104-0045, Tokyo, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Goto H, Igarashi T, Yamamoto M, Yasuda M, Sekiguchi R, Watai M, Tanno K, Yasumoto T. Quantitative determination of marine toxins associated with diarrhetic shellfish poisoning by liquid chromatography coupled with mass spectrometry. J Chromatogr A 2001; 907:181-9. [PMID: 11217024 DOI: 10.1016/s0021-9673(00)01047-5] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quantitative determination by liquid chromatography (LC) coupled with mass spectrometry (MS) was achieved for the following 10 toxins found in association with diarrhetic shellfish poisoning: okadaic acid (OA), dinophysistoxin-1 (DTX1), 7-O-palmitoylokadaic acid (palOA), 7-O-palmitoyldinophysistoxin-1 (pa1DTX1), pectenotoxin-1 (PTX1), pectenotoxin-2 (PTX2), pectenotoxin-2 seco acid (PTX2SA), pectenotoxin-6 (PTX6), yessotoxin (YTX), and 45-hydroxyyessotoxin (YTXOH). Toxins in 2 g of the adductor muscle or the digestive glands of scallops, Patinopecten yessoensis, were extracted with 18 ml of methanol-water (9:1, v/v), freed of polar contaminants by partition between chloroform and water, and treated by solid-phase extraction on a silica cartridge column. Samples containing YTXOH were purified separately on a buffered reversed-phase column. Chromatographic separation was achieved by the following combinations of columns and mobile phases: a Symmetry C18 column with acetonitrile-0.05% acetic acid (7:3, v/v) for OA, DTX1, PTX6 and PTX2SA; a Develosil ODS column with the same mobile phase for PTX1 and PTX2; a Capcellpak column with methanol-2.5% acetic acid (98:2, v/v) for palOA and palDTX1; and an Inertsil ODS column with methanol-0.2 M ammonium acetate (8:2, v/v) for YTX and YTXOH. Carboxylic acid toxins were selectively monitored on [M-H]- ions, sulfated toxins on [M-Na]-ions, and neutral toxins on [M+NH4]+ ions. Average recoveries of the toxins spiked to tissue homogenates ranged from 70 to 134%. Detection limits in the muscle ranged from 5 to 40 ng/g and those in the digestive glands from 10 to 80 ng/g.
Collapse
Affiliation(s)
- H Goto
- Japan Food Research Laboratories, Tama Laboratory, Tokyo, Japan
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Furuse J, Maru Y, Yoshino M, Mera K, Sumi H, Sekiguchi R, Satake M, Hasebe T, Ochiai A. Assessment of arterial tumor vascularity in small hepatocellular carcinoma. Comparison between color doppler ultrasonography and radiographic imagings with contrast medium: dynamic CT, angiography, and CT hepatic arteriography. Eur J Radiol 2000; 36:20-7. [PMID: 10996754 DOI: 10.1016/s0720-048x(00)00185-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Hepatocellular carcinoma (HCC) is characterized by tumor vascularization from the hepatic artery. The objective of our work was to compare color Doppler ultrasonography (CDU), including power Doppler ultrasonography (PDU) with radiographic imagings with contrast medium in regard to the detection of the arterial tumor vascularity of small hepatocellular carcinomas (HCC). We examined 42 small HCC lesions 2 cm or less in diameter in 37 patients for arterial tumor vascularity by conventional CDU, PDU, dynamic computed tomography (dCT), digital subtraction angiography (DSA), and CT hepatic arteriography (CTA). Color images were detected in 25 (59.5%) and 28 (66.7%) of the 42 lesions with conventional CDU and PDU, respectively, and tumor vascularity was detected in 26 (61.9%) by dCT, 23 (54.8%) by DSA, and 29 (69.0%) by CTA. Tumor vascularity could be detected in 51.9% by PDU and CTA, more than by conventional CDU, dCT, and DSA (44.4, 44.4, and 33.3%, respectively) in well-differentiated HCC, whereas the detection rates by these techniques were almost equal (86.7% by CDU, 93.3% by PDU, dCT, and DSA, 100% by CTA, respectively) in moderately and poorly differentiated HCC. PDU is superior to CDU, dCT and DSA and equal to CTA for the detection of tumor vascularity in small HCC, particularly in well-differentiated HCC.
Collapse
Affiliation(s)
- J Furuse
- Department of Internal Medicine, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, 277-8577, Chiba, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Furuse J, Ogino T, Ryu M, Kinoshita T, Konishi M, Kawano N, Ishikura S, Shimizu W, Sekiguchi R, Moriyama N, Iwasaki M, Yoshino M. Intraoperative and conformal external-beam radiation therapy in patients with locally advanced pancreatic carcinoma; results from a feasibility phase II study. Hepatogastroenterology 2000; 47:1142-6. [PMID: 11020899] [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: 02/17/2023]
Abstract
BACKGROUND/AIMS Chemoradiation therapy is widely indicated to patients with locally advanced pancreatic carcinoma, though the capability of radiotherapy alone is not assessed enough. The purpose of this study is to clarify the efficacy and safety of a more intensive radiotherapy for those patients. METHODOLOGY Fifteen patients were enrolled in a feasible phase II study of treatment with intraoperative radiation therapy (25 Gy), followed by conformal external-beam radiation therapy (40 Gy in 20 fractions, 5 times/week). The antitumor effect was evaluated on the early phase of dynamic computed tomography image. RESULTS The full irradiation dose was feasible in 12 of 15 patients. The overall response rate was 40% (1 complete and 5 partial responses). Grade 3 toxicity was observed in 2 patients (13%) with nausea/vomiting or anorexia. One patient developed gastric ulcer and died of gastrointestinal bleeding 12 months after intraoperative radiation therapy. The median survival time was 11.1 months, and the 2-year survival rates were 13%. Survival for more than 2 years was observed in 2 of the 6 responders. CONCLUSIONS The above radiotherapy is considered to be active for the locally advanced pancreatic cancer with acceptable toxicity, when the gastrointestinal tract is excluded from the radiation field. This should be further assessed in late phase II studies involving a large number of patients.
Collapse
Affiliation(s)
- J Furuse
- Department of Internal Medicine, National Cancer Center Hospital East, Chiba, Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Iinuma G, Ushio K, Ishikawa T, Nawano S, Sekiguchi R, Satake M. Diagnosis of gastric cancers: comparison of conventional radiography and digital radiography with a 4 million-pixel charge-coupled device. Radiology 2000; 214:497-502. [PMID: 10671599 DOI: 10.1148/radiology.214.2.r00fe11497] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE To evaluate the differences in accuracy and observer performance at conventional radiography and at digital radiography with a 4 million-pixel charge-coupled device (CCD) for the diagnosis of gastric cancers. MATERIALS AND METHODS A prospective study was performed of 225 patients with suspected gastric cancer who were referred to our hospital from January 1997 through February 1997. One hundred twelve patients were examined at conventional radiography and 113 were examined at digital radiography, and 24 and 27 patients had gastric cancer, respectively. Six radiologists interpreted the images, with attention to tumor findings. They were blinded to the clinical details, and their interpretations were rated against those of three other radiologists who examined the patients and who were aware of the clinical information such as endoscopic features and/or histopathologic findings in biopsy specimens. Receiver operating characteristic (ROC) analysis was used to compare the differences in observer performance for the diagnosis of gastric cancers at conventional radiography and at digital radiography. RESULTS The overall sensitivity was 64.6% at conventional radiography versus 75.3% at digital radiography (P =. 287); specificities were 84.5% and 90.5%, respectively (P =.011); and the positive predictive values were 53.1% and 71.3%, respectively (P =.036). ROC analysis clearly showed higher diagnostic performance at digital radiography than at conventional radiography. CONCLUSION The data demonstrate the high diagnostic value of digital radiography with a 4 million-pixel CCD for gastric cancers. The technique has considerable potential as an alternative to conventional gastrointestinal radiography.
Collapse
Affiliation(s)
- G Iinuma
- Department of Diagnostic Radiology, National Cancer Center Hospital, 1-1 Tsukiji 5-chome, Chuo-ku, Tokyo 104-0045, Japan.
| | | | | | | | | | | |
Collapse
|
45
|
Abstract
OBJECTIVE As an imaging modality for follow-up during continuous or repeated hepatic arterial infusion chemotherapy using a hepatic intra-arterial indwelling catheter, the usefulness of CT while infusing contrast through the indwelling catheter (reservoir port) was examined. METHODS Using reservoir ports implanted in eight patients with hepatic metastasis from colon cancer, radioisotope perfusion scintigraphy (RI), CT (three rates of infusion of contrast were used), and digital subtraction angiography (AG) were performed to compare the modalities' ability to visualize the intrahepatic and abnormal extrahepatic distributions. RESULTS CT (infusion rate 0.1 mL/sec) was superior to AG and RI in terms of the ability to visualize intrahepatic distribution, particularly in small areas, and facilitated 3D delineation of the distribution. In evaluating extrahepatic distribution, CT also outperformed the other modalities. CONCLUSIONS For imaging study follow-up during hepatic arterial infusion chemotherapy, CT proved to be more useful than conventional RI and AG.
Collapse
Affiliation(s)
- M Morimoto
- Department of Radiology, National Cancer Center Hospital East, Kashiwa City, Chiba, Japan
| | | | | | | | | |
Collapse
|
46
|
Murakami K, Nawano S, Moriyama N, Sekiguchi R, Satake M, Iwata R, Hayashi T, Nemoto K. [Staging of pancreatic ductal adenocarcinoma using dynamic MR imaging]. Nihon Igaku Hoshasen Gakkai Zasshi 1997; 57:596-601. [PMID: 9293758] [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: 02/05/2023]
Abstract
Single breath-hold gradient echo images were obtained before and immediately after bolus intravenous administration of Gd-DTPA (dynamic MR imaging) in the study of the pancreas. Of 37 patients with pathologically proved pancreatic ductal adenocarcinoma, seventeen patients who underwent both dynamic MR imaging studies and curative surgery were included in this study. Correlations between histologic findings in the resected specimens and MR images were analyzed as to tumor extension and staging according to the General Rules for the Study of Pancreatic Cancer (4th Edition) published by the Japan Pancreas Society. In comparison with conventional MR images, dynamic MR imaging improved the detectability of pancreatic carcinoma and delineation of the vasculature by clarifying the margin of the tumor and the vessels. Nonenhanced T1-weighted imaging is the best sequence to estimate peripancreatic tumor extension, because the contrast between the tumor and peripancreatic fat deteriorates with the use of contrast material. There is a tendency to overestimate vascular invasion on MR images, the reason for which is considered to be the contractive nature of fibrotic change induced by pancreatic carcinoma. The diagnostic efficacy of lymph node metastasis remains insufficient on MR images because some cases show no enlargement of lymph nodes in spite of the existence of pathological metastasis. Our results suggest that dynamic MR imaging has the advantage of improving the conspicuity of the tumor and the vasculature.
Collapse
Affiliation(s)
- K Murakami
- Department of Radiology, Funabashi Central Hospital
| | | | | | | | | | | | | | | |
Collapse
|
47
|
Sekiguchi R. [Effects of NMDA antagonist, MK-801 on spatial exploratory behavior in the rat]. Shinrigaku Kenkyu 1997; 68:88-94. [PMID: 9278960 DOI: 10.4992/jjpsy.68.88] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Rats given an antagonist against N-methyl-D-aspartate, (+)-10, 11-dihydro-5-methyl-5H-debenzo (a, d) cycloheptene-5, 10-imine (MK-801), were compared with control rats for their activity and exploratory behavior (habituation, exploration time to the spatial change of one of 4 objects and to the new object) in a circular open field. Rats given 0.07 mg/kg dose of MK-801 displayed no significant differences with the controls. Rats given 0.1 mg/kg dose of MK-801 failed to respond to the spatial change, whereas they displayed habituation and exploration to the new object at the same degree as the control rats. Rats given 0.3 mg/kg dose of MK-801 displayed hyperactivity and did not display habituation and exploration. The result suggests that the 0.1 mg/kg dose of MK-801, which dose not affect on activity, habituation and exploration to the new object in rats, selectively affects on acquisition of spatial information and reduces their spatial exploration.
Collapse
Affiliation(s)
- R Sekiguchi
- Department of Psychology, Faculty of Sociology, Kansai University, Suita
| |
Collapse
|
48
|
Moriyama N, Nawano S, Murakami K, Satake M, Sekiguchi R. [Obstructive jaundice: progress in instrument used for diagnosis. 5) CT and MRI]. Nihon Naika Gakkai Zasshi 1997; 86:608-14. [PMID: 9198652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
|
49
|
Murakami K, Nawano S, Moriyama N, Sekiguchi R, Satake M, Fujimoto H, Ichikawa T. Intracranial metastases of hepatocellular carcinoma: CT and MRI. Neuroradiology 1996; 38 Suppl 1:S31-5. [PMID: 8811676 DOI: 10.1007/bf02278115] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We report clinical characteristics and CT and MRI in 16 patients with brain metastases due to hepatocellular carcinoma (HCC). Eight of these 16 patients presented with apoplexy-like symptoms (50%). Pulmonary metastases were found in 13 cases (81.3%). The mean survival from the appearance of cerebral metastases to death was 6.2 weeks, which is one of the shortest survival terms in metastatic brain tumours. Haemorrhagic brain metastases were observed in 14 patients (87.5%) with a tendency for the frequency of bleeding to increase in proportion to the size of the tumour. On both contrast-enhanced CT and MRI, metastatic brain tumours enhanced strongly, suggesting that brain metastases, like HCC, are also hypervascular. MRI is useful in evaluating brain metastases from HCC, especially in order to differentiate tumour from haemorrhage. Our results demonstrated a poor prognosis and bleeding tendency of brain metastases due to HCC and showed the usefulness of CT and MRI in achieving a correct diagnosis.
Collapse
Affiliation(s)
- K Murakami
- Department of Radiology, National Cancer Centre Hospital East, Chiba, Japan
| | | | | | | | | | | | | |
Collapse
|
50
|
Oyama H, Wakao F, Sekiguchi R, Ohmatsu H. Virtual reality enhanced surgical conference system. Stud Health Technol Inform 1995; 29:273-9. [PMID: 10163760] [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: 02/11/2023]
Abstract
We present our ongoing work on an enhanced surgical conference system with a technology of virtual reality (VR). We reported on a surgical simulation support system by using a technology of virtual reality last year. In the present time, while using our VR simulation system, we realized that many surgeons and nurses needed to see both a solid real image and a virtual image of the surgical operation at the same time. According to this reason we added a solid video system to our previous VR simulation system. The new system can display both real and virtual images on 100 inch wide screen and a console monitor of Onyx computer. The doctors can see both images with shutter glasses on the screen or console. We can now simulate various cancer surgery while watching the real solid surgical picture. We expect our enhanced surgical conference system to be beneficial for surgeons and nurses with limited experience to familiarize surgical procedures. The system could be also employed in planning a surgical procedure and educating medical staffs. Here we discuss about the aim of the system, current implementation, its limitations and its future directions.
Collapse
Affiliation(s)
- H Oyama
- Department of Neurosurgery, National Cancer Center Hospital, Tokyo, Japan
| | | | | | | |
Collapse
|