1
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Ishigami S, Fukada R, Nagasaka G, Tsuruta T, Nishikawa K, Sasaki Y, Nimura K, Oshima I, Yamagishi Y, Morimoto Y, Kamada T, Ishii T. Halogenated Cyclic Monoterpenoids with Anti-Biofouling Activity from the Okinawan Red Marine Algae Portieria Hornemannii. Chem Biodivers 2024; 21:e202400436. [PMID: 38529722 DOI: 10.1002/cbdv.202400436] [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: 02/20/2024] [Revised: 03/25/2024] [Accepted: 03/25/2024] [Indexed: 03/27/2024]
Abstract
The red algal genus Portieria is a prolific producer of halogenated monoterpenoids. In this study, we isolated and characterised monoterpenoids from the Okinawan red algae Portieria hornemannii. A new polyhalogenated cyclic monoterpenoid, 2(R)-chloro-1,6(S)-dibromo-3(8)(Z)-ochtoden-4(R)-ol (1), along with three known monoterpenoids, (2R,3(8)E,4S,6R)-6-bromo-2-chloro-1,4-oxido-3(8)-ochtodene (2), 1-bromo-2-chloroochtoda-3(8),5-dien-4-one (3), and 2-chloro-1-hydroxyochtoda-3(8),5-dien-4-one (4) were isolated from the methanol extract of three populations of P. hornemannii. These compounds were characterised using a combination of spectroscopic methods and chemical synthesis, and the absolute stereochemistry of compounds 1 and 2 was determined. In addition, all isolated compounds were screened for their anti-biofouling activity against the mussel Mytilus galloprovincialis, and 1 exhibited strong activity. Therefore, halogenated monoterpenoids have the potential to be used as natural anti-biofouling drugs.
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Affiliation(s)
- Shinnosuke Ishigami
- The United Graduate School of Agricultural Sciences, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 890-0065, Japan
| | - Ryosuke Fukada
- Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka, 437-8555, Japan
| | - Genki Nagasaka
- Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka, 437-8555, Japan
| | - Tomoki Tsuruta
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Keisuke Nishikawa
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Yu Sasaki
- Department of Biosciences and Biotechnology, Faculty of Agriculture, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan
| | - Kazumi Nimura
- Shizuoka Prefectural Research Institute of Fishery and Ocean, 136-24 Iwashigashima, Yaizu, Shizuoka, 425-0032, Japan
| | - Iori Oshima
- Shizuoka Prefectural Research Institute of Fishery and Ocean, 136-24 Iwashigashima, Yaizu, Shizuoka, 425-0032, Japan
| | - Yukimasa Yamagishi
- Faculty of Life Science and Biotechnology, Fukuyama University, 1 Gakuen-cho, Fukuyama, Hiroshima, 729-0292, Japan
| | - Yoshiki Morimoto
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Takashi Kamada
- Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka, 437-8555, Japan
| | - Takahiro Ishii
- The United Graduate School of Agricultural Sciences, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 890-0065, Japan
- Department of Biosciences and Biotechnology, Faculty of Agriculture, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan
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Nagasaka M, Isa H, Tahara A, Fukada R, Kamada T, Ishii T. Diversity of Halogenated Secondary Metabolites in Okinawan Aplysia argus Including 12-Hydroxypinnaterpene C and Their Feeding Targets. Chem Biodivers 2023; 20:e202300791. [PMID: 37350187 DOI: 10.1002/cbdv.202300791] [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: 05/30/2023] [Revised: 06/19/2023] [Accepted: 06/21/2023] [Indexed: 06/24/2023]
Abstract
A new irieane-type diterpene, 12-hydroxypinnaterpene C (1), and 21 known compounds, angasiol acetate (2), angasiol (3), 11-deacetylpinnaterpene C (4), palisadin A (5), 12-acetoxypalisadin B (6), 12-hydroxypalisadin B (7), aplysistatin (8), luzodiol (9), 5-acetoxy-2-bromo-3-chloro-chamigra-7(14),9-dien-8-one (10), neoirietriol (11), neoirietetraol (12), (3Z)-laurenyne (13), cupalaurenol (14), cupalaurenol acetate (15), (3Z)-venustinene (16), 10-hydroxykahukuene B (17), aplysiol B (18), (3Z)-13-epipinnatifidenyne (19), 3Z,6R,7R,12S,13S-obtusenyne (20), (3Z,9Z)-7-chloro-6-hydroxy-12-oxo-pentadeca-3,9-dien-1-yne (21), and cholest-7-en-3,5,7-triol (22) were isolated from the digestive diverticula of Aplysia argus from the Ikei Island in Okinawa, Japan. The structures of these compounds were determined using spectroscopic methods such as NMR and HR-ESI-MS. These compounds were tested for their antibacterial activity against the phytopathogen Ralstonia solanacearum. Compounds 11 and 21 exhibited antibacterial activity at 30 μg/disc. In this study, we also discuss the types of red algae that A. argus feeds on in the shallow waters of Okinawa Prefecture.
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Affiliation(s)
- Misaki Nagasaka
- Department of Biosciences and Biotechnology, Faculty of Agriculture, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan
| | - Hayato Isa
- Department of Biosciences and Biotechnology, Faculty of Agriculture, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan
| | - Arisu Tahara
- Department of Biosciences and Biotechnology, Faculty of Agriculture, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan
| | - Ryosuke Fukada
- Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka, 437-8555, Japan
| | - Takashi Kamada
- Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka, 437-8555, Japan
| | - Takahiro Ishii
- Department of Biosciences and Biotechnology, Faculty of Agriculture, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan
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3
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Fukada R, Yamagishi Y, Nagasaka M, Osada D, Nimura K, Oshima I, Tsujimoto K, Kirihara M, Takizawa S, Kikuchi N, Ishii T, Kamada T. Antifouling Brominated Diterpenoids from Japanese Marine Red Alga Laurencia venusta Yamada. Chem Biodivers 2023; 20:e202300888. [PMID: 37468446 DOI: 10.1002/cbdv.202300888] [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: 06/16/2023] [Revised: 07/16/2023] [Accepted: 07/17/2023] [Indexed: 07/21/2023]
Abstract
The marine red algal genus Laurencia has abundant halogenated secondary metabolites, which exhibit novel structural types and possess various unique biological potentials, including antifouling activity. In this study, we report the isolation, structure elucidation, and antifouling activities of two novel brominated diterpenoids, aplysin-20 aldehyde (1), 13-dehydroxyisoaplysin-20 (2), and its congeners. We screened marine red alga Laurencia venusta Yamada for their antifouling activity against the mussel Mytilus galloprovincialis. Ethyl acetate extracts of L. venusta from Hiroshima and Chiba, Japan, were isolated and purified, and the compound structures were identified using 1D and 2D NMR, HR-APCI-MS, IR, and chemical synthesis. Seven secondary metabolites were identified, and their antifouling activities were evaluated. Compounds 1, 2, and aplysin-20 (3) exhibited strong activities against M. galloprovincialis. Therefore, these compounds can be explored as natural antifouling drugs.
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Affiliation(s)
- Ryosuke Fukada
- Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka, 437-8555, Japan
| | - Yukimasa Yamagishi
- Faculty of Life Science and Biotechnology, Fukuyama University, 1 Gakuen-cho, Fukuyama, Hiroshima, 729-0292, Japan
| | - Misaki Nagasaka
- Department of Biosciences and Biotechnology, Faculty of Agriculture, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan
| | - Daiki Osada
- Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka, 437-8555, Japan
| | - Kazumi Nimura
- Shizuoka Prefectural Research Institute of Fishery and Ocean, 136-24 Iwashigashima, Yaizu, Shizuoka, 425-0032, Japan
| | - Iori Oshima
- Shizuoka Prefectural Research Institute of Fishery and Ocean, 136-24 Iwashigashima, Yaizu, Shizuoka, 425-0032, Japan
| | - Kazuki Tsujimoto
- Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka, 437-8555, Japan
| | - Masayuki Kirihara
- Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka, 437-8555, Japan
| | - Shinobu Takizawa
- Artificial Intelligence Research Center, SANKEN, Osaka University, Mihogaoka, Ibaraki, Osaka, 567-0047, Japan
| | - Norio Kikuchi
- Coastal Branch of Natural History Museum and Institute, Chiba, 123 Yoshio, Katsuura, Chiba, 299-5242, Japan
| | - Takahiro Ishii
- Department of Biosciences and Biotechnology, Faculty of Agriculture, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan
| | - Takashi Kamada
- Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka, 437-8555, Japan
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Fukada R, Kawano J, Tsuruta T, Nonaka T, Sato K, Miyazawa S, Ishigami S, Ishii T, Nishikawa K, Asakawa Y, Kamada T. Two New Eremophilane-Type Sesquiterpenoids from Japanese Liverwort Bazzania japonica. Chem Biodivers 2023; 20:e202300131. [PMID: 36894501 DOI: 10.1002/cbdv.202300131] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 03/09/2023] [Accepted: 03/09/2023] [Indexed: 03/11/2023]
Abstract
Two new eremophilane-type sesquiterpenoids, fusumaols A (1) and B (2), were isolated from the stem-leafy liverwort, Bazzaniajaponica collected in Mori-Machi, Shizuoka, Japan. Their structures were established using extensive spectroscopic (IR, MS, and 2D NMR) data, and the absolute configuration of 1 was determined by the modified Mosher's method. This is the first time eremophilanes have been discovered in the liverwort genus Bazzania. Compounds 1 and 2 were evaluated for their repellent activity against the adult population of the rice weevil Sitophilus zeamais using the modified filter paper impregnation method. Both sesquiterpenoids showed moderate repellent activities.
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Affiliation(s)
- Ryosuke Fukada
- Shizuoka Institute of Science and Technology: Shizuoka Rikoka Daigaku, Department of Material and Life Science, 2200-2 Toyosawa, 2200-2, Fukuroi, JAPAN
| | - Jin Kawano
- Shizuoka Institute of Science and Technology: Shizuoka Rikoka Daigaku, Department of Material and Life Science, 2200-2 Toyosawa, 2200-2, Fukuroi, JAPAN
| | - Tomoki Tsuruta
- Osaka Metropolitan University: Osaka Koritsu Daigaku, Department of Chemistry, Graduate School of Science, 3-3-138, Sugimoto, 558-8585, Sumiyoshi-ku, JAPAN
| | - Takuto Nonaka
- Shizuoka Institute of Science and Technology: Shizuoka Rikoka Daigaku, Department of Material and Life Science, 2200-2 Toyosawa, 2200-2, Fukuroi, JAPAN
| | - Kosuke Sato
- Shizuoka Institute of Science and Technology: Shizuoka Rikoka Daigaku, Department of Material and Life Science, 2200-2 Toyosawa, 2200-2, Fukuroi, JAPAN
| | - Susumu Miyazawa
- Shizuoka Institute of Science and Technology: Shizuoka Rikoka Daigaku, Department of Material and Life Science, 2200-2 Toyosawa, 2200-2, Fukuroi, JAPAN
| | - Shinnosuke Ishigami
- Ryukyu Daigaku, Department of Bioscience and Biotechnology Faculty of Agriculture, 1 Senbaru, 903-0213, Nishihara, JAPAN
| | - Takahiro Ishii
- Ryukyu Daigaku, Department of Bioscience and Biotechnology Faculty of Agriculture, 1 Senbaru, 903-0213, Nishihara, JAPAN
| | - Keisuke Nishikawa
- Osaka Metropolitan University: Osaka Koritsu Daigaku, Department of Chemistry, Graduate School of Science, 3-3-138, Sugimoto, 558-8585, Sumiyoshi-ku, JAPAN
| | - Yoshinori Asakawa
- Tokushima Bunri University: Tokushima Bunri Daigaku, Faculty of Pharmaceutical Sciences, Yamashiro-cho, 770-8514, Yamashiro-cho, JAPAN
| | - Takashi Kamada
- Shizuoka Institute of Science and Technology: Shizuoka Rikoka Daigaku, Department of Material and Life Science, 2200-2 Toyosawa, 437-8555, Fukuroi, JAPAN
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Miura S, Sawada R, Yorita A, Kida H, Kamada T, Yamanishi Y. A trial of topiramate for patients with hereditary spinocerebellar ataxia. Clin Case Rep 2023; 11:e6980. [PMID: 36855409 PMCID: PMC9968455 DOI: 10.1002/ccr3.6980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/24/2022] [Accepted: 02/06/2023] [Indexed: 02/27/2023] Open
Abstract
In an open pilot trial, six patients with various hereditary forms of spinocerebellar ataxia (SCA) were assigned to topiramate (50 mg/day) for 24 weeks. Four patients completed the protocol without adverse events. Of these four patients, topiramate was effective for three patients. Some patients with SCA could respond to treatment with topiramate.
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Affiliation(s)
- Shiroh Miura
- Department of Neurology and Geriatric MedicineEhime University Graduate School of MedicineToonEhimeJapan
| | - Ryusuke Sawada
- Department of PharmacologyOkayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKita‐kuOkayamaJapan
| | - Akiko Yorita
- Division of Respirology, Neurology and Rheumatology, Department of MedicineKurume University School of MedicineKurumeFukuokaJapan
| | - Hiroshi Kida
- Department of AnatomyFukuoka University School of MedicineJonan‐kuFukuokaJapan
| | - Takashi Kamada
- Department of NeurologyFukuoka Sanno HospitalSawara‐kuFukuokaJapan
| | - Yoshihiro Yamanishi
- Department of Bioscience and Bioinformatics, Faculty of Computer Science and Systems EngineeringKyushu Institute of TechnologyIizukaFukuokaJapan
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Sato K, Ishigami S, Koike M, Takegahara H, Yamamoto A, Kaneko K, Tani K, Ishii T, Kamada T. New Marine Diterpenoid from the Okinawan Soft Coral, Lobophytum sp. Nat Prod Commun 2023. [DOI: 10.1177/1934578x221075978] [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: 01/24/2023] Open
Abstract
A new lobane-type diterpenoid, loba-8,10,13(15)-triene-14,17,18-triol 17-acetate (1), and 5 known compounds, lobatriene (2), (17 R)-loba-8,10,13(15)-triene-17,18-diol (3), loba-8,10,13(15)-triene-14,17,18-triol 14,17-diacetate (4), loba-8,10,13(15)-triene-14,17,18-triol 14-acetate (5), and lobatrienetriol (6), were isolated from a population of Okinawan soft coral Lobophytum sp. The structures of these compounds were elucidated by spectroscopy, including nuclear magnetic resonance and high-resolution mass spectrometry. The cytotoxicity and genotoxicity of these compounds were tested using human lymphoblastoid TK6 cells.
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Affiliation(s)
- Kosuke Sato
- Shizuoka Institute of Science and Technology, Fukuroi, Shizuoka, Japan
| | - Shinnosuke Ishigami
- Faculty of Agriculture, University of the Ryukyus, Nishihara, Okinawa, Japan
| | - Masaki Koike
- Shizuoka Institute of Science and Technology, Fukuroi, Shizuoka, Japan
| | - Haruto Takegahara
- National Institute of Technology, Hachinohe College, Hachinohe, Aomori, Japan
| | - Ayumi Yamamoto
- National Institute of Technology, Hachinohe College, Hachinohe, Aomori, Japan
| | - Kensuke Kaneko
- National Institute of Technology, Hachinohe College, Hachinohe, Aomori, Japan
| | - Kazuki Tani
- Faculty of Agriculture, University of the Ryukyus, Nishihara, Okinawa, Japan
| | - Takahiro Ishii
- Faculty of Agriculture, University of the Ryukyus, Nishihara, Okinawa, Japan
| | - Takashi Kamada
- Shizuoka Institute of Science and Technology, Fukuroi, Shizuoka, Japan
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Shinde T, Saito A, Okada K, Wakasa M, Kimoto M, Kamada T, Shibata K, Okura K, Sato H, Takahashi Y. Influence of lower extremity rotation on knee kinematics in single-leg landing. Phys Ther Sport 2022; 58:87-92. [DOI: 10.1016/j.ptsp.2022.10.002] [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] [Received: 03/12/2022] [Revised: 10/02/2022] [Accepted: 10/03/2022] [Indexed: 11/29/2022]
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Hagiwara K, Kamada T, Suzuki SO, Miyoshi A, Tanaka H, Shigeto H, Ohara S, Akamatsu N. Stereo-electroencephalography evidence of an eccentrically located seizure-onset zone around a polymorphous low-grade neuroepithelial tumor of the young: illustrative case. Journal of Neurosurgery: Case Lessons 2022; 3:CASE22106. [PMCID: PMC9379642 DOI: 10.3171/case22106] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 03/09/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND
Polymorphous low-grade neuroepithelial tumor of the young (PLNTY) is a newly identified low-grade brain tumor with frequent epileptic presentation. Despite the facilitated use of invasive electroencephalography owing to the growing availability of stereo-electroencephalography (SEEG), intracranial features of tumor-related seizures are still scarcely described. This report provides the first description of SEEG-recorded seizures in PLNTY to provide an insight into its surgical strategy.
OBSERVATIONS
Spontaneous clinical seizures were recorded with SEEG in a young adult patient with drug-resistant epilepsy associated with a PLNTY in the left lateral temporal cortex. The seizure onset was characterized by low-voltage fast activity (LVFA) and showed eccentric localization with respect to the tumor: LVFA was localized in the anterior portion of the tumor and spread toward the adjacent polar cortex. The language risks associated with the resection of the posterior temporal cortex could thus be minimized.
LESSONS
PLNTY can show a focal and eccentric seizure-onset zone around the tumor. The present findings serve to improve the functional and seizure outcomes using the staged invasive approach in PLNTY.
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Affiliation(s)
| | | | | | | | - Hideaki Tanaka
- Department of Psychiatry, Shourai Hospital, Saga, Japan; and
| | - Hiroshi Shigeto
- Epilepsy and Sleep Center and
- Division of Medical Technology, Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Shinji Ohara
- Epilepsy and Sleep Center and
- Department of Psychiatry, Shourai Hospital, Saga, Japan; and
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Minamida Y, Matsuura H, Ishii T, Miyagi M, Shinjo Y, Sato K, Kamada T, Mihara Y, Togashi I, Sugimoto K, Abe T, Kikuchi N, Suzuki M. New acetogenin katsuurallene from Laurencia saitoi collected from Katsuura, Japan. Nat Prod Bioprospect 2022; 12:10. [PMID: 35266062 PMCID: PMC8907347 DOI: 10.1007/s13659-022-00328-1] [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] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 11/12/2021] [Indexed: 06/14/2023]
Abstract
We examined the chemical constitution of the red alga Laurencia saitoi Perestenko, collected from Katsuura, Boso Peninsula, Chiba Prefecture, Japan. This specimen produced a new polyhalogenated acetogenin, named katsuurallene (1), which structure was determined by the spectral methods, along with known diterpene, deoxyparguerol (2) and triterpene, thyrsiferol (3). In this paper we describe the structural elucidation of katsuurallene together with some biological activities.
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Affiliation(s)
- Yu Minamida
- Advanced Course of Applied Chemistry, National Institute of Technology, Asahikawa College, Shunkodai 2-2-1-6, Asahikawa, Hokkaido, 071-8142, Japan
- Department of Life Science, Graduate School of Engineering Science, Akita University, 1-1 Tegatagakuen-machi, Akita, 010-8502, Japan
| | - Hiroshi Matsuura
- Department of Materials Chemistry, National Institute of Technology, Asahikawa Collage, Shunkodai 2-2-1-6, Asahikawa, Hokkaido, 071-8142, Japan.
| | - Takahiro Ishii
- Department of Biosciences and Biotechnology, Faculty of Agriculture, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan
| | - Miyu Miyagi
- Department of Biosciences and Biotechnology, Faculty of Agriculture, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan
| | - Yuto Shinjo
- Department of Biosciences and Biotechnology, Faculty of Agriculture, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan
| | - Kosuke Sato
- Department of Materials and Life Science, Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka, 437-8555, Japan
| | - Takashi Kamada
- Department of Materials and Life Science, Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka, 437-8555, Japan
| | - Yoshihiro Mihara
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, Maeda 7, 15-4-1, Teine-ku, Sapporo, Hokkaido, 006-8590, Japan
| | - Iwao Togashi
- Department of Materials Chemistry, National Institute of Technology, Asahikawa Collage, Shunkodai 2-2-1-6, Asahikawa, Hokkaido, 071-8142, Japan
| | - Keisuke Sugimoto
- Department of Materials Chemistry, National Institute of Technology, Asahikawa Collage, Shunkodai 2-2-1-6, Asahikawa, Hokkaido, 071-8142, Japan
| | - Tsuyoshi Abe
- The Hokkaido University Museum, Hokkaido University, N10 W8, Kita-ku, Sapporo, Hokkaido, 060-0810, Japan
| | - Norio Kikuchi
- Coastal Branch of Natural History Museum and Institute, Chiba,, 123 Yoshio, Katsuura, Chiba, 299-5242, Japan
| | - Minoru Suzuki
- Coastal Branch of Natural History Museum and Institute, Chiba,, 123 Yoshio, Katsuura, Chiba, 299-5242, Japan
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Hagiwara K, Tanaka H, Miyoshi A, Kamada T, Shigeto H, Ohara S, Akamatsu N. Postoperative striatal degeneration: a hitherto unrecognized impact of frontal disconnection surgery for drug-resistant epilepsy. Illustrative cases. Journal of Neurosurgery: Case Lessons 2022; 3:CASE21644. [PMID: 36130543 PMCID: PMC9379656 DOI: 10.3171/case21644] [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] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 01/13/2022] [Indexed: 11/07/2022]
Abstract
BACKGROUND Frontal disconnection surgery is a useful surgical option for patients with frontal epilepsy whose seizure onset zones are exceedingly large and thus are not amenable to conventional resective surgery. While it has the advantage of avoiding sequelae stemming from a large resection cavity, the impact of radical anatomofunctional disconnection of such a vast frontal region is not fully understood. OBSERVATIONS The authors have identified secondary degeneration in the striatum ipsilateral to the frontal disconnection surgery in two adult patients who had otherwise favorable postoperative outcomes following the surgery. On serial postoperative magnetic resonance imaging, the striatum showed transient restricted diffusion in the caudate head and rostral putamen around several weeks postoperatively and subsequent atrophy in the caudate head. The affected striatal regions (i.e., the anterior portion of the striatum) were congruent with the known fronto-striatal connectivity corresponding to the disconnected frontal regions anterior to the primary and supplementary motor areas. Both patients achieved 1-year seizure freedom without apparent disability related to the surgery. LESSONS The benign postoperative course despite the marked degenerative changes in the ipsilateral striatum supports the feasibility of the frontal disconnection surgery in otherwise inoperable patients with broad frontal epileptogenicity.
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Affiliation(s)
| | - Hideaki Tanaka
- Department of Neurosurgery, Fukuoka Sanno Hospital, Fukuoka, Japan; and
| | | | | | - Hiroshi Shigeto
- Epilepsy and Sleep Center
- Division of Medical Technology, Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Shinji Ohara
- Epilepsy and Sleep Center
- Department of Neurosurgery, Fukuoka Sanno Hospital, Fukuoka, Japan; and
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Sato K, Kaneko K, Kamekawa T, Taba K, Ishigami S, Wada M, Ishii T, Abe T, Kamada T, Suzuki M. Corrigendum: Two New Halogenated Compounds from the Marine Red Alga
Laurencia nipponica
Yamada from the Kunashiri and Etorofu Islands. Chem Biodivers 2022; 19:e202200112. [DOI: 10.1002/cbdv.202200112] [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: 11/12/2022]
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12
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Kamada T, Ishii T, Sato K, Ito G, Kawano J, Takabe W, Phan CS, Ishigami S. Unusual Cembrane Diterpenoid Isolated from the Japanese Soft Coral Genus Sinularia. HETEROCYCLES 2022. [DOI: 10.3987/com-21-14613] [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: 11/19/2022]
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13
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S. Vairappan C, Tani K, Kamada T, Phan CS. New Bioactive Sesquiterpenoid from Malaysian Soft Coral Genus Lemnalia. HETEROCYCLES 2022. [DOI: 10.3987/com-22-14667] [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: 11/19/2022]
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Motoki A, Akamatsu N, Fumuro T, Miyoshi A, Tanaka H, Hagiwara K, Ohara S, Kamada T, Shigeto H, Murai H. Comparison of Acute Withdrawal and Slow Taper of Antiseizure Medications during Video Electroencephalographic Monitoring: Efficacy for Shortening of Hospital Stay. J Clin Med 2021; 10:jcm10245972. [PMID: 34945267 PMCID: PMC8707373 DOI: 10.3390/jcm10245972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/12/2021] [Accepted: 12/17/2021] [Indexed: 12/05/2022] Open
Abstract
Antiepileptic medications (ASMs) are withdrawn at the epilepsy monitoring unit to facilitate seizure recordings. The effect of rapid tapering of ASMs on the length of hospital stay has not been well documented. We compared the mean length of hospital stay between patients who underwent acute ASM withdrawal and slow dose tapering during long-term video electroencephalography (EEG) monitoring. We retrospectively investigated 57 consecutive patients admitted to the epilepsy monitoring unit regarding the mean length of hospital stay in the acute ASM withdrawal group (n = 30) and slow-taper group (n = 27). In the acute-withdrawal group, all ASMs were discontinued once the patients were admitted. In the slow-taper group, the doses of ASMs were gradually reduced by 15–30% daily. We also evaluated the safety of the acute-withdrawal and slow-taper protocols. The mean lengths of hospital stay were 3.8 ± 1.92 and 5.2 ± 0.69 days in the acute-withdrawal and slow-taper groups, respectively (p < 0.005). No severe adverse events, including status epilepticus, were observed. Acute ASM withdrawal has the advantage of significantly reducing the length of hospital stay over slow tapering, without any severe adverse effects.
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Affiliation(s)
- Ayako Motoki
- Department of Clinical Medical Sciences, International University of Health and Welfare Graduate School of Medicine, Tokyo 107-8402, Japan; (A.M.); (H.M.)
| | - Naoki Akamatsu
- Department of Clinical Medical Sciences, International University of Health and Welfare Graduate School of Medicine, Tokyo 107-8402, Japan; (A.M.); (H.M.)
- Epilepsy Center, Fukuoka Sanno Hospital, Fukuoka 814-0001, Japan; (A.M.); (H.T.); (K.H.); (S.O.); (T.K.); (H.S.)
- Department of Neurology, International University of Health and Welfare School of Medicine, Narita 286-8686, Japan
- Correspondence: ; Tel.: +81-92-832-1100; Fax: +81-92-832-3061
| | - Tomoyuki Fumuro
- Department of Laboratory Medicine, International University of Health and Welfare School of Medical Sciences at Okawa, Okawa 324-8501, Japan;
| | - Ayako Miyoshi
- Epilepsy Center, Fukuoka Sanno Hospital, Fukuoka 814-0001, Japan; (A.M.); (H.T.); (K.H.); (S.O.); (T.K.); (H.S.)
| | - Hideaki Tanaka
- Epilepsy Center, Fukuoka Sanno Hospital, Fukuoka 814-0001, Japan; (A.M.); (H.T.); (K.H.); (S.O.); (T.K.); (H.S.)
| | - Koichi Hagiwara
- Epilepsy Center, Fukuoka Sanno Hospital, Fukuoka 814-0001, Japan; (A.M.); (H.T.); (K.H.); (S.O.); (T.K.); (H.S.)
| | - Shinji Ohara
- Epilepsy Center, Fukuoka Sanno Hospital, Fukuoka 814-0001, Japan; (A.M.); (H.T.); (K.H.); (S.O.); (T.K.); (H.S.)
| | - Takashi Kamada
- Epilepsy Center, Fukuoka Sanno Hospital, Fukuoka 814-0001, Japan; (A.M.); (H.T.); (K.H.); (S.O.); (T.K.); (H.S.)
| | - Hiroshi Shigeto
- Epilepsy Center, Fukuoka Sanno Hospital, Fukuoka 814-0001, Japan; (A.M.); (H.T.); (K.H.); (S.O.); (T.K.); (H.S.)
- Division of Medical Technology, Kyushu University, Fukuoka 819-0395, Japan
| | - Hiroyuki Murai
- Department of Clinical Medical Sciences, International University of Health and Welfare Graduate School of Medicine, Tokyo 107-8402, Japan; (A.M.); (H.M.)
- Department of Neurology, International University of Health and Welfare School of Medicine, Narita 286-8686, Japan
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Motoki A, Akamatsu N, Fumuro T, Miyoshi A, Tanaka H, Hagiwara K, Ohara S, Kamada T, Shigeto H, Murai H. Characteristics of olfactory dysfunction in patients with temporal lobe epilepsy. Epilepsy Behav 2021; 125:108402. [PMID: 34775249 DOI: 10.1016/j.yebeh.2021.108402] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/19/2021] [Accepted: 10/21/2021] [Indexed: 11/15/2022]
Abstract
OBJECTIVE To determine the characteristics of olfactory dysfunction in patients with temporal lobe epilepsy (TLE). METHODS Odor identification was assessed using the odor stick identification test for Japanese (OSIT-J, full score 12 points) in 65 patients with TLE and in 74 controls. RESULTS The mean OSIT-J score was significantly lower in patients with TLE (mean ± SD = 8.1 ± 2.8; median = 9) than in the control subjects (mean ± SD = 10.6 ± 1.1; median = 11) (P < 0.005). Olfactory dysfunction (hyposmia/anosmia) was associated with bilateral seizure foci and older age of onset in TLE. Patients who underwent temporal lobectomy for hippocampal sclerosis did not show significant decline after long-term recovery. The Indian ink part of OSIT-J was useful for the detection of olfactory deficits in patients with TLE (sensitivity = 47%, specificity = 93%). Patients with TLE tended to have preserved olfactory ability for stimulating odors and for familiar odors of daily life. SIGNIFICANCE We observed characteristic odor identification deficits for individual odors used in OSIT-J. Our study findings provide deeper insight into the underlying mechanism of olfactory function in patients with TLE and may be beneficial in the clinical management of these patients.
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Affiliation(s)
- Ayako Motoki
- International University of Health and Welfare Graduate School of Medicine, Tokyo, Japan
| | - Naoki Akamatsu
- International University of Health and Welfare Graduate School of Medicine, Tokyo, Japan; Epilepsy Center, Fukuoka Sanno Hospital, Fukuoka, Japan; International University of Health and Welfare School of Medicine, Department of Neurology, Narita, Japan.
| | - Tomoyuki Fumuro
- International University of Health and Welfare School of Medicine, Department of Neurology, Narita, Japan
| | - Ayako Miyoshi
- Epilepsy Center, Fukuoka Sanno Hospital, Fukuoka, Japan
| | | | | | - Shinji Ohara
- Epilepsy Center, Fukuoka Sanno Hospital, Fukuoka, Japan
| | | | - Hiroshi Shigeto
- Epilepsy Center, Fukuoka Sanno Hospital, Fukuoka, Japan; Kyushu University Division of Medical Technology, Fukuoka, Japan
| | - Hiroyuki Murai
- International University of Health and Welfare Graduate School of Medicine, Tokyo, Japan; International University of Health and Welfare School of Medicine, Department of Neurology, Narita, Japan; International University of Health and Welfare School of Medical Sciences at Okawa, Department of Laboratory Medicine, Okawa, Japan
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16
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Miura S, Kamada T, Fujioka R, Yamanishi Y. Plasma amino acids in patients with essential tremor. Clin Case Rep 2021; 9:e04580. [PMID: 34429988 PMCID: PMC8365401 DOI: 10.1002/ccr3.4580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 06/15/2021] [Accepted: 06/23/2021] [Indexed: 11/11/2022] Open
Abstract
Essential tremor (ET) is one of the most common movement disorders. However, there are currently no accepted biomarkers for ET. This report suggested that concentration of plasma glutamic acid, aspartic acid, and taurine could be biomarkers for ET.
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Affiliation(s)
- Shiroh Miura
- Department of Neurology and Geriatric MedicineEhime University Graduate School of MedicineShitsukawa, ToonJapan
- Division of Respirology, Neurology, and RheumatologyDepartment of MedicineKurume University School of MedicineFukuokaJapan
| | - Takashi Kamada
- Division of Respirology, Neurology, and RheumatologyDepartment of MedicineKurume University School of MedicineFukuokaJapan
| | - Ryuta Fujioka
- Department of Food and NutritionBeppu University Junior CollegeOitaJapan
| | - Yoshihiro Yamanishi
- Department of Bioscience and BioinformaticsFaculty of Computer Science and Systems EngineeringKyushu Institute of TechnologyFukuokaJapan
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17
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Sato K, Kaneko K, Kamekawa T, Taba K, Ishigami S, Wada M, Ishii T, Abe T, Kamada T, Suzuki M. Two New Halogenated Compounds from the Marine Red Alga Laurencia nipponica Yamada from the Kunashiri and Etorofu Islands. Chem Biodivers 2021; 18:e2100397. [PMID: 34302322 DOI: 10.1002/cbdv.202100397] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 07/22/2021] [Indexed: 11/06/2022]
Abstract
The red alga Laurencia nipponica comprises various chemical races distributed relative to the ocean current in Japanese coastal areas. We investigated the chemical compositions and chemical races of L. nipponica distributed from the Kunashiri and Etorofu Islands, the confluence of the Soya warm current and Oya-shio cold current. Two new halogenated secondary metabolites, deacetylneonipponallene (1) and neopacifenol (2), along with four known compounds, deoxyprepacifenol (3), pacifenol (4), halo-chamigrene diether (5), and isolaurallene (6) were isolated from L. nipponica collected at Chikappunai, Kunashiri Island, while Zaimokuiwa (Kunashiri Island) and Sana (Etorofu Island) populations contained 3, 7-hydroxylaurene (7), 2,10-dibromo-3-chloro-9-hydroxy-α-chamigrene (8), and (3Z)-laurefucin (9). The structures of 1 and 2 were established using spectroscopic methods. The chemical races of L. nipponica distributed in this area were divided into 6- and 9-producing races. Interestingly, both races contained 4 as an additional race-index, as well as its derivatives, 2 and 5. To the best of our knowledge, this is the first example of a race comprising a mixture of two race-index compounds, suggesting that the convergence of two currents causes the production of new and diverse chemical races in this species.
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Affiliation(s)
- Kosuke Sato
- Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka, 437-8555, Japan
| | - Kensuke Kaneko
- Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, 606-8501, Japan
| | - Tsuyoshi Kamekawa
- Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka, 437-8555, Japan
| | - Kanako Taba
- Faculty of Agriculture, University of the Ryukyus, Senbaru 1, Nishihara, Okinawa, 903-0213, Japan
| | - Shinnosuke Ishigami
- Faculty of Agriculture, University of the Ryukyus, Senbaru 1, Nishihara, Okinawa, 903-0213, Japan
| | - Masahiro Wada
- Faculty of Agriculture, University of the Ryukyus, Senbaru 1, Nishihara, Okinawa, 903-0213, Japan
| | - Takahiro Ishii
- Faculty of Agriculture, University of the Ryukyus, Senbaru 1, Nishihara, Okinawa, 903-0213, Japan
| | - Tsuyoshi Abe
- The Hokkaido University Museum, Hokkaido University, Sapporo, 060-0810, Japan
| | - Takashi Kamada
- Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka, 437-8555, Japan
| | - Minoru Suzuki
- Coastal Branch of Natural History Museum and Institute, Chiba, 123 Yoshio, Katsuura, Chiba, 299-5242, Japan
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Hagiwara K, Okadome T, Mukaino T, Uehara T, Tanaka H, Kamada T, Miyoshi A, Akamatsu N, Ohara S, Shigeto H. Ictal asystole as a manifestation of pure insular epilepsy. Seizure 2021; 91:192-195. [PMID: 34218043 DOI: 10.1016/j.seizure.2021.06.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/18/2021] [Accepted: 06/21/2021] [Indexed: 11/26/2022] Open
Affiliation(s)
- Koichi Hagiwara
- Epilepsy and Sleep Center, Fukuoka Sanno Hospital, Fukuoka, Japan.
| | - Toshiki Okadome
- Department of Neurology, Neurological Institute, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Takahiko Mukaino
- Department of Neurology, Neurological Institute, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Taira Uehara
- Epilepsy Center, International University of Health and Welfare Narita Hospital, Narita, Japan
| | - Hideaki Tanaka
- Department of Neurosurgery, Fukuoka Sanno Hospital, Fukuoka, Japan
| | - Takashi Kamada
- Epilepsy and Sleep Center, Fukuoka Sanno Hospital, Fukuoka, Japan
| | - Ayako Miyoshi
- Epilepsy and Sleep Center, Fukuoka Sanno Hospital, Fukuoka, Japan
| | - Naoki Akamatsu
- Epilepsy and Sleep Center, Fukuoka Sanno Hospital, Fukuoka, Japan; Epilepsy Center, International University of Health and Welfare Narita Hospital, Narita, Japan
| | - Shinji Ohara
- Department of Neurosurgery, Fukuoka Sanno Hospital, Fukuoka, Japan
| | - Hiroshi Shigeto
- Epilepsy and Sleep Center, Fukuoka Sanno Hospital, Fukuoka, Japan; Division of Medical Technology, Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Minamida Y, Matsuura H, Ishii T, Sato K, Kamada T, Kato A, Yamagishi Y, Abe T, Kikuchi N, Suzuki M. Chemical composition of Laurencia spp. collected from the Seto Inland Sea of Japan. BIOCHEM SYST ECOL 2021. [DOI: 10.1016/j.bse.2021.104259] [Citation(s) in RCA: 1] [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: 11/29/2022]
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20
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Miura S, Shimojo T, Morikawa T, Kamada T, Uchiyama Y, Kurata S, Fujioka R, Shibata H. Familial paroxysmal kinesigenic dyskinesia with a novel missense variant (Arg2866Trp) in NBEA. J Hum Genet 2021; 66:805-811. [PMID: 33692494 DOI: 10.1038/s10038-021-00914-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 02/17/2021] [Accepted: 02/20/2021] [Indexed: 11/10/2022]
Abstract
Paroxysmal kinesigenic dyskinesia (PKD) is a movement disorder characterized by episodic involuntary movement attacks triggered by sudden movements, acceleration, or intention to move. We ascertained two Japanese familial cases with PKD. The proband is a 22-year-old woman who had noted sudden brief (<30 s) of involuntary movements provoked by kinesigenic trigger such as starting to run, getting on a train, picking up a telephone receiver and so on at the age of 14. Interictal brain single photon emission computed tomography (SPECT) showed hyperperfusion in the left thalamus. A 46-year-old woman, the mother of the proband was also suffering from brief attacks triggered by starting to run in her high school days. On neurological examination, both showed no abnormality. Whole exome sequencing combined with rigorous filtering revealed two heterozygous nonsynonymous variants (NM_001447: c.8976G > C [p.Gln2992His] in FAT2 and NM_015678: c.8596C > T [p.Arg2866Trp] in NBEA). Real time quantitative PCR analysis of Nbea mRNA levels in the developing rat brain revealed peak at postnatal day 28 and decline at postnatal day 56. This result might match the most common clinical course of PKD from the point of view of the most common age at remission. NBEA has been reported to be responsible for neurodevelopmental disease accompanied by epilepsy. We concluded the variant in NBEA most likely to be responsible for our familial cases of PKD.
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Affiliation(s)
- Shiroh Miura
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Toon, 791-0295, Japan.,Division of Genomics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, 812-8582, Japan
| | - Tomofumi Shimojo
- Division of Genomics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, 812-8582, Japan
| | - Takuya Morikawa
- Division of Genomics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, 812-8582, Japan
| | - Takashi Kamada
- Department of Neurology, Fukuoka Sanno Hospital, Fukuoka, 814-0001, Japan
| | - Yusuke Uchiyama
- Department of Radiology, Kurume University School of Medicine, Kurume, 830-0011, Japan
| | - Seiji Kurata
- Department of Radiology, Kurume University School of Medicine, Kurume, 830-0011, Japan
| | - Ryuta Fujioka
- Department of Food and Nutrition, Beppu University Junior College, Beppu, 874-8501, Japan
| | - Hiroki Shibata
- Division of Genomics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, 812-8582, Japan.
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21
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Ng SY, Ang LP, Hau VL, Suleiman M, Vairappan CS, Kamada T. Structural Diversity, Anti-Fungal Activity and Chemosystematics of Bornean Liverwort Bazzania harpago (De Not.) Schiffner. SAINS MALAYS 2021. [DOI: 10.17576/jsm-2021-5001-11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Two terpenes; cneorubin X (1), (-)-gymnomitr-3(15)-en-4β-ol (2) as well as one benzoic compound; caffeic acid (3) were isolated from Bazzania harpago collected from Mt. Trus Madi, Sabah, Malaysia. The structures of these secondary metabolites were elucidated based on spectroscopic data (Infra-Red (IR), 1D and 2D Nuclear Magnetic Resonance (NMR), and Mass Spectrum (MS)). This is the first record that cneorubin X (1) was isolated from non-vascular plants and it exhibited active anti-fungal activity against Haliphthoros sabahensis and Haliphthoros milfordensis. Chemosystematics finding suggests that the Marchantiophyta (liverworts) genus Bazzania might have a closer chemical relationship to its sister group Bryophyta (mosses) genus Brachythecium, Kindbergia and Mnium, as well as Anthocerophyta (hornworts) genus Anthocerosin their evolutionary history.
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Takizawa S, Kirihara M, Adachi K, Sakamoto Y, Tujimoto K, Yamahara S, Matsushima R, Namba Y, Kimura Y, Sato K, Kamada T. Chloroamidation of Alkenes Using Sodium Hypochlorite Pentahydrate and Its Application to Synthesis of Aziridines. HETEROCYCLES 2021. [DOI: 10.3987/com-20-s(k)68] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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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Ng SY, Phan CS, Ishii T, Kamada T, Hamada T, Vairappan CS. Terpenoids from Marine Soft Coral of the Genus Xenia in 1977 to 2019. Molecules 2020; 25:molecules25225386. [PMID: 33217924 PMCID: PMC7698640 DOI: 10.3390/molecules25225386] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 10/17/2020] [Revised: 11/10/2020] [Accepted: 11/12/2020] [Indexed: 01/02/2023] Open
Abstract
Members of the marine soft coral genus Xenia are rich in a diversity of diterpenes. A total of 199 terpenes consisting of 14 sesquiterpenes, 180 diterpenes, and 5 steroids have been reported to date. Xenicane diterpenes were reported to be the most common chemical skeleton biosynthesized by members of this genus. Most of the literature reported the chemical diversity of Xenia collected from the coral reefs in the South China Sea and the coastal waters of Taiwan. Although there was a brief review on the terpenoids of Xenia in 2015, the present review is a comprehensive overview of the structural diversity of secondary metabolites isolated from soft coral genus Xenia and their potent biological activity as reported between 1977 to 2019.
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Affiliation(s)
- Shean-Yeaw Ng
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu 88400, SBH, Malaysia; (S.-Y.N.); (C.-S.P.)
| | - Chin-Soon Phan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu 88400, SBH, Malaysia; (S.-Y.N.); (C.-S.P.)
| | - Takahiro Ishii
- Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan;
| | - Takashi Kamada
- Department of Materials and Life Science, Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka 437-8555, Japan;
| | - Toshiyuki Hamada
- Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan;
| | - Charles Santhanaraju Vairappan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu 88400, SBH, Malaysia; (S.-Y.N.); (C.-S.P.)
- Correspondence: ; Tel.: +60-88-320-000 (ext. 2353); Fax: +60-88-320-291
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24
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Applegate KE, Rühm W, Wojcik A, Bourguignon M, Brenner A, Hamasaki K, Imai T, Imaizumi M, Imaoka T, Kakinuma S, Kamada T, Nishimura N, Okonogi N, Ozasa K, Rübe CE, Sadakane A, Sakata R, Shimada Y, Yoshida K, Bouffler S. Individual response of humans to ionising radiation: governing factors and importance for radiological protection. Radiat Environ Biophys 2020; 59:185-209. [PMID: 32146555 DOI: 10.1007/s00411-020-00837-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 02/26/2020] [Indexed: 05/23/2023]
Abstract
Tissue reactions and stochastic effects after exposure to ionising radiation are variable between individuals but the factors and mechanisms governing individual responses are not well understood. Individual responses can be measured at different levels of biological organization and using different endpoints following varying doses of radiation, including: cancers, non-cancer diseases and mortality in the whole organism; normal tissue reactions after exposures; and, cellular endpoints such as chromosomal damage and molecular alterations. There is no doubt that many factors influence the responses of people to radiation to different degrees. In addition to the obvious general factors of radiation quality, dose, dose rate and the tissue (sub)volume irradiated, recognized and potential determining factors include age, sex, life style (e.g., smoking, diet, possibly body mass index), environmental factors, genetics and epigenetics, stochastic distribution of cellular events, and systemic comorbidities such as diabetes or viral infections. Genetic factors are commonly thought to be a substantial contributor to individual response to radiation. Apart from a small number of rare monogenic diseases such as ataxia telangiectasia, the inheritance of an abnormally responsive phenotype among a population of healthy individuals does not follow a classical Mendelian inheritance pattern. Rather it is considered to be a multi-factorial, complex trait.
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Affiliation(s)
| | - W Rühm
- Helmholtz Center Munich, German Research Center for Environmental Health, Institute of Radiation Medicine, Neuherberg, Germany
| | - A Wojcik
- Centre for Radiation Protection Research, MBW Department, Stockholm University, Stockholm, Sweden
| | - M Bourguignon
- Department of Biophysics and Nuclear Medicine, University of Paris Saclay (UVSQ), Verseilles, France
| | - A Brenner
- Department of Epidemiology, Radiation Effects Research Foundation, Hiroshima, Japan
| | - K Hamasaki
- Department of Molecular Biosciences, Radiation Effects Research Foundation, Hiroshima, Japan
| | - T Imai
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Sciences and Technology, Chiba, Japan
| | - M Imaizumi
- Department of Nagasaki Clinical Studies, Radiation Effects Research Foundation, Nagasaki, Japan
| | - T Imaoka
- Department of Radiation Effects Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan
| | - S Kakinuma
- Department of Radiation Effects Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan
| | - T Kamada
- QST Hospital, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan
| | - N Nishimura
- Department of Radiation Effects Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan
| | - N Okonogi
- QST Hospital, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan
| | - K Ozasa
- Department of Epidemiology, Radiation Effects Research Foundation, Hiroshima, Japan
| | - C E Rübe
- Department of Radiation Oncology, Saarland University Medical Center, Homburg/Saar, Germany
| | - A Sadakane
- Department of Epidemiology, Radiation Effects Research Foundation, Hiroshima, Japan
| | - R Sakata
- Department of Epidemiology, Radiation Effects Research Foundation, Hiroshima, Japan
| | - Y Shimada
- National Institute for Quantum and Radiological Science and Technology, Chiba, Japan
- Institute for Environmental Sciences, Aomori, Japan
| | - K Yoshida
- Immunology Laboratory, Department of Molecular Biosciences, Radiation Effects Research Foundation, Hiroshima, Japan
| | - S Bouffler
- Radiation Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilto, Didcot, UK
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Phan CS, Kamada T, Vairappan CS. Two new epimers of C 15-acetogenin, 4- epi-isolaurallene and 4- epi-itomanallene A as diastereomeric model. Nat Prod Res 2020; 34:1008-1013. [DOI: 10.1080/14786419.2018.1543681] [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: 10/27/2022]
Affiliation(s)
- Chin-Soon Phan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Takashi Kamada
- Laboratory of Natural Products Chemistry, Department of Materials and Life Science, Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka 437-8555, Japan
| | - Charles S. Vairappan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
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Kamada T, Johanis ML, Ng SY, Phan CS, Suleiman M, Vairappan CS. A New Epi-neoverrucosane-type Diterpenoid from the Liverwort Pleurozia subinflata in Borneo. Nat Prod Bioprospect 2020; 10:51-56. [PMID: 32062804 PMCID: PMC7046843 DOI: 10.1007/s13659-020-00232-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 02/06/2020] [Indexed: 06/01/2023]
Abstract
New bioactive 13-epi-neoverrucosane diterpenoid, 5β-acetoxy-13-epi-neoverrucosanic acid (1) along with three known secondary metabolites, 13-epi-neoverrucosan-5β-ol (2), chelodane (3) and (E)-β-farnesene (4) were isolated from the MeOH extract of east Malaysia's liverwort Pleurozia subinflata. The chemical structure of new compound was elucidated by the analyses of its spectroscopic data (FTIR, NMR and HR-ESI-MS). These epi-neoverrucosane-type compounds seem to be notable chemosystematic markers for P. subinflata in Borneo. Compound 3 was widespread in marine sponges however this is the first record for 3 to be found in liverwort. These metabolites were tested for their antifungal potentials against selected fungi from the marine environment. Compound 1 exhibited effective antifungal activity against Lagenidium thermophilum.
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Affiliation(s)
- Takashi Kamada
- Department of Materials and Life Science, Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka, 437-8555, Japan.
- Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400, Kota Kinabalu, Sabah, Malaysia.
| | - Mary Lyn Johanis
- Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Shean-Yeaw Ng
- Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Chin-Soon Phan
- Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Monica Suleiman
- Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Charles S Vairappan
- Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400, Kota Kinabalu, Sabah, Malaysia
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27
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Hamada T, Matsumoto Y, Phan CS, Kamada T, Onitsuka S, Okamura H, Iwagawa T, Arima N, Tani F, Vairappan CS. Aaptamine-Related Alkaloid from the Marine Sponge Aaptos aaptos. Nat Prod Commun 2019. [DOI: 10.1177/1934578x19863935] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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] Open
Abstract
A new aaptamine-related alkaloid, 1,3-dioxolo [4,5- d] benzo [ de]-1,6-naphthyridine (methylenedioxyaaptamine, 1), was isolated from the organic extracts of the Bornean marine sponge Aaptos aaptos, together with a known aaptamine derivative, 8,9,9-trimethoxy-9 H-benzo [ de]-1,6-naphthyridine (2). The structure of compound 1 was elucidated by interpretation of its spectroscopic data. Two compounds were tested for their cytotoxic potentials against adult T-cell leukemia (ATL) cells, and compound 1 showed moderate cytotoxic potential.
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Affiliation(s)
- Toshiyuki Hamada
- Graduate School of Science and Engineering, Kagoshima University, Kagoshima, Japan
| | - Yoshito Matsumoto
- Graduate School of Science and Engineering, Kagoshima University, Kagoshima, Japan
| | - Chin-Soon Phan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
| | - Takashi Kamada
- Laboratory of Natural Products Chemistry, Department of Materials and Life Science, Faculty of Science and Technology, Shizuoka Institute of Science and Technology, Fukuroi, Japan
| | - Satoaki Onitsuka
- Graduate School of Science and Engineering, Kagoshima University, Kagoshima, Japan
| | - Hiroaki Okamura
- Graduate School of Science and Engineering, Kagoshima University, Kagoshima, Japan
| | - Tetsuo Iwagawa
- Graduate School of Science and Engineering, Kagoshima University, Kagoshima, Japan
| | - Naomichi Arima
- Division of Hematology and Immunology, Center for Chronic Viral Diseases, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Fumito Tani
- Institute for Material Chemistry and Engineering, Kyushu University, Fukuoka, Japan
| | - Charles S. Vairappan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
- Small Island Research Centre, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
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Karasawa K, Omatsu T, Okonogi N, Murata H, Fukuda S, Kamada T. A Clinical Trial of Curative Accelerated Partial-Breast Irradiation for Stage I Breast Cancer using Carbon Ion Radiotherapy. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.670] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
A new cembranolide diterpene, sarcophytonolide V (1), along with 6 known compounds, isosarcophytonolide D (2), (4 Z,8 S*,9 R*,12 E,14 E)-9-hydroxy-1-(prop-1-en-2-yl)-8,12-dimethyl-oxabicyclo[9.3.2]-hexadeca-4,12,14-trien-18-one (3), (7 E,11 E)-3,4-epoxy-7,11,15-cembratriene (4), (1 S*,3 S*,4 S*,7 E,11 E)-3,4-epoxy-13-oxo-7,11,15-cembratriene (5), (-)-eunicenone (6), and 2-[( E, E, E)-7′,8′-epoxy-4′,8′,12′-trimethylcyclotetradeca-1′,3′,11′-trienyl]propan-2-ol (7) were isolated from the Bornean soft coral Sarcophyton sp. Their structures were elucidated based on spectroscopic data, such as nuclear magnetic resonance (NMR) and high resolution electron spray ionization mass spectroscopy (HRESIMS). These compounds were evaluated for their biological activity against marine pathogenic fungi.
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Affiliation(s)
- Kazuki Tani
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
| | - Takashi Kamada
- Laboratory of Natural Products Chemistry, Department of Materials and Life Science, Faculty of Science and Technology, Shizuoka Institute of Science and Technology, Fukuroi, Japan
| | - Chin-Soon Phan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
| | - Charles S. Vairappan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
- Small Island Research Center, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
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Abstract
A new sesquiterpene, capgermacrene H (1) was isolated together with 7 other compounds, capgermacrenes A-G (2-8), from a population of soft coral Capnella imbricata collected from Mantanani Island, Sabah, Malaysia. The structure of this metabolite was elucidated based on spectroscopic data such as nuclear magnetic resonance and high-resolution electrospray ionization mass spectrometry. Capgermacrene A (2) showed potent cytotoxicity against adult T-cell leukemia, S1T cells at half-maximal inhibitory concentration of 0.79 µg/mL.
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Affiliation(s)
- Chin-Soon Phan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
| | - Takashi Kamada
- Laboratory of Natural Products Chemistry, Department of Materials and Life Science, Faculty of Science and Technology, Shizuoka Institute of Science and Technology, Fukuroi, Shizuoka, Japan
| | - Takahiro Ishii
- Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus, Nishihara, Okinawa, Japan
| | - Toshiyuki Hamada
- Graduate School of Science and Engineering, Kagoshima University, Kagoshima, Japan
| | - Charles Santhanaraju Vairappan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
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31
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Harada M, Miura S, Kida H, Moritaka T, Irie KI, Kamada T, Uchiyama Y, Shima S, Mutoh T, Hoshino T, Taniwaki T. Reversible Conduction Failure in Anti-lactosylceramide-antibody-positive Combined Central and Peripheral Demyelination. Front Neurol 2019; 10:600. [PMID: 31231307 PMCID: PMC6566138 DOI: 10.3389/fneur.2019.00600] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 03/01/2019] [Accepted: 05/21/2019] [Indexed: 11/13/2022] Open
Abstract
We describe a 60-year-old woman with combined central and peripheral demyelination who presented with obstinate constipation, weakness in the lower limbs, and a bilateral sensory disturbance below her chest followed by girdle sensation in the right region of the abdomen, which was responsive to steroid therapy and plasmapheresis. Serum anti-lactosylceramide antibody was positive without anti-neurofascin 155 antibody or anti-galactocerebroside antibody positivity. Two months later, the patient had a first relapse that was responsive to steroid treatment. A nerve conduction study confirmed reversible conduction failure (RCF) in both episodes. Our case is unique in that she had an RCF episode as well as some similarities to encephalomyeloradiculoneuropathy.
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Affiliation(s)
- Masaya Harada
- Division of Respirology, Neurology and Rheumatology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Shiroh Miura
- Division of Respirology, Neurology and Rheumatology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Hiroshi Kida
- Division of Respirology, Neurology and Rheumatology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Taiga Moritaka
- Division of Respirology, Neurology and Rheumatology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Ken-Ichi Irie
- Division of Respirology, Neurology and Rheumatology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Takashi Kamada
- Division of Respirology, Neurology and Rheumatology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Yusuke Uchiyama
- Department of Radiology, Kurume University School of Medicine, Kurume, Japan
| | - Sayuri Shima
- Department of Neurology, Fujita Health University School of Medicine, Aichi, Japan
| | - Tatsuro Mutoh
- Department of Neurology, Fujita Health University School of Medicine, Aichi, Japan
| | - Tomoaki Hoshino
- Division of Respirology, Neurology and Rheumatology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Takayuki Taniwaki
- Division of Respirology, Neurology and Rheumatology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
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32
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Shamsudin KJ, Phan CS, Kulip J, Hatai K, Vairappan CS, Kamada T. Leucoxenols A and B, two new phenolics from Bornean medicinal plant Syzygium leucoxylon. J Asian Nat Prod Res 2019; 21:435-441. [PMID: 29502443 DOI: 10.1080/10286020.2018.1440391] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 02/10/2018] [Indexed: 06/08/2023]
Abstract
The medicinal plant, Syzygium leucoxylon or commonly known as Obah found in North Borneo was considered as traditional medicine by local committee. Two new phenolics, leucoxenols A (1) and B (2) were isolated and identified as major secondary metabolites from the leaves of S. leucoxylon. Their chemical structures were elucidated based on spectroscopic data such as NMR and HRESIMS. Furthermore, these compounds were active against selected strains of fungi.
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Affiliation(s)
- Kamsirah Jim Shamsudin
- a Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation , Universiti Malaysia Sabah , 88400 Kota Kinabalu , Malaysia
| | - Chin-Soon Phan
- a Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation , Universiti Malaysia Sabah , 88400 Kota Kinabalu , Malaysia
| | - Julius Kulip
- a Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation , Universiti Malaysia Sabah , 88400 Kota Kinabalu , Malaysia
| | - Kishio Hatai
- b Microbiology and Fish Disease Laboratory , Borneo Marine Research Institute, Universiti Malaysia Sabah , 88400 Kota Kinabalu , Malaysia
| | - Charles Santhanaraju Vairappan
- a Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation , Universiti Malaysia Sabah , 88400 Kota Kinabalu , Malaysia
| | - Takashi Kamada
- a Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation , Universiti Malaysia Sabah , 88400 Kota Kinabalu , Malaysia
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33
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Phan CS, Yee CS, Vairappan CS, Ishii T, Kamada T. Sinulaflexiolide P, A Cembrane-Type Diterpenoid from Bornean Soft Coral Sinularia flexibilis. Chem Nat Compd 2019. [DOI: 10.1007/s10600-019-02668-w] [Citation(s) in RCA: 6] [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: 11/28/2022]
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Kamada T, Phan CS, Vairappan CS. Nangallenes A and B, halogenated nonterpenoid C 15-acetogenins from the Bornean red alga Laurencia nangii. J Asian Nat Prod Res 2019; 21:241-247. [PMID: 29281900 DOI: 10.1080/10286020.2017.1417265] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 12/11/2017] [Indexed: 06/07/2023]
Abstract
Two new halogenated nonterpenoids C15-acetogenins, nangallenes A-B (1-2), together with two known halogenated compounds itomanallene A (3) and 2,10-dibromo-3-chloro-α-chamigrene (4), were isolated and identified from the organic extract of the marine red alga Laurencia nangii Masuda collected from the coastal waters in Semporna, Borneo. Their structures were established by means of spectroscopic analysis including IR, high-resolution electrospray ionization mass spectrometry (HRESI-MS), and 1D and 2D NMR techniques. All these metabolites were submitted for the antifungal assay against four species of selected marine fungi. Compounds 1-4 showed potent activity against Haliphthoros sabahensis and Lagenidium thermophilum.
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Affiliation(s)
- Takashi Kamada
- a Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation , Universiti Malaysia Sabah , Kota Kinabalu 88400 , Malaysia
| | - Chin-Soon Phan
- a Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation , Universiti Malaysia Sabah , Kota Kinabalu 88400 , Malaysia
| | - Charles S Vairappan
- a Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation , Universiti Malaysia Sabah , Kota Kinabalu 88400 , Malaysia
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35
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Kamada T, Miura S, Harada M, Irie A, Kikuchi S, Taniwaki T, Kurata S, Uchiyama Y, Takahashi T. Bilateral cingulate cortices lesions in two autoantibodies directed against MOG (MOG-Ab)-positive patients. Mult Scler Relat Disord 2019; 29:108-110. [PMID: 30708307 DOI: 10.1016/j.msard.2019.01.035] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 01/19/2019] [Accepted: 01/22/2019] [Indexed: 11/26/2022]
Abstract
There are no specific radiologic features in MOG-Ab (autoantibodies directed against myelin oligodendrocyte glycoprotein)-associated diseases. We present two MOG-Ab-positive patients with symmetrical lesions in the bilateral cingulate cortex of the frontal and parietal lobes. Those lesions showed hyperperfusion in acute phase and hypoperfusion in chronic phase on brain SPECT. In both patients, steroid therapy was effective in acute phase and for prevention of recurrence. High signal in the bilateral cingulate cortex on MR T2-weighted and FLAIR images might to be one of the unique findings considered MOG-Ab associated diseases.
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Affiliation(s)
- Takashi Kamada
- Department of Neurology, Division of Respirology, Neurology and Rheumatology, Department of Medicine, Kurume University School of Medicine, 67 Asahi-machi, Kurume 830-0011, Japan
| | - Shiroh Miura
- Department of Neurology, Division of Respirology, Neurology and Rheumatology, Department of Medicine, Kurume University School of Medicine, 67 Asahi-machi, Kurume 830-0011, Japan.
| | - Masaya Harada
- Department of Neurology, Division of Respirology, Neurology and Rheumatology, Department of Medicine, Kurume University School of Medicine, 67 Asahi-machi, Kurume 830-0011, Japan
| | - Azusa Irie
- Department of Neurology, Division of Respirology, Neurology and Rheumatology, Department of Medicine, Kurume University School of Medicine, 67 Asahi-machi, Kurume 830-0011, Japan
| | - Shinsuke Kikuchi
- Department of Neurology, Division of Respirology, Neurology and Rheumatology, Department of Medicine, Kurume University School of Medicine, 67 Asahi-machi, Kurume 830-0011, Japan
| | - Takayuki Taniwaki
- Department of Neurology, Division of Respirology, Neurology and Rheumatology, Department of Medicine, Kurume University School of Medicine, 67 Asahi-machi, Kurume 830-0011, Japan
| | - Seiji Kurata
- Department of Radiology, Kurume University School of Medicine, Japan
| | - Yusuke Uchiyama
- Department of Radiology, Kurume University School of Medicine, Japan
| | - Toshiyuki Takahashi
- Department of Neurology, Tohoku University Graduate School of Medicine, Japan; Department of Neurology, National Hospital Organization Yonezawa Hospital, Japan
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36
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Kamada T, Miura S, Kida H, Irie KI, Yamanishi Y, Hoshino T, Taniwaki T. MIBG myocardial scintigraphy in progressive supranuclear palsy. J Neurol Sci 2019; 396:3-7. [DOI: 10.1016/j.jns.2018.10.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 10/19/2018] [Accepted: 10/20/2018] [Indexed: 02/07/2023]
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37
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Abstract
One new phenylbutenoid, (3 Z)-2′,4′,5′-trimethoxyphenylbutadiene (1) along with five known metabolites were isolated from aquatic galangal ( Alpinia aquatica Rosc.) and their chemotaxonomy importance in five populations of A. aquatica collected from Kota Kinabalu, Ranau and Kota Belut in Sabah, Malaysia. The antibacterial potential as well as the chemosystematics importance of this discovery is discussed.
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Affiliation(s)
- Takashi Kamada
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Shean-Yeaw Ng
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Chin-Soon Phan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Charles S. Vairappan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
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38
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Tani K, Kamada T, Phan CS, Vairappan CS. New cembrane-type diterpenoids from Bornean soft coral Nephthea sp. with antifungal activity against Lagenidium thermophilum. Nat Prod Res 2018; 33:3343-3349. [DOI: 10.1080/14786419.2018.1475387] [Citation(s) in RCA: 5] [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: 10/16/2022]
Affiliation(s)
- Kazuki Tani
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
| | - Takashi Kamada
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
| | - Chin-Soon Phan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
| | - Charles Santhanaraju Vairappan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
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Hatai K, Kamada T, Lau LM, Kulip J, Phan CS, Vairappan CS. In vitro Inhibitory Effects of Two Bornean Medicinal Wild Gingers against Pathogenic Lagenidium thermophilum Infected Mud Crab Scylla tranquebarica. Biocontrol Sci 2018; 23:35-39. [PMID: 29576593 DOI: 10.4265/bio.23.35] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
The antifungal activity of two Bornean medicinal wild gingers Plagiostachys megacarpa and Zingiber phillippsiae were examined against Lagenidium thermophilum. The most active extract was P. megacarpa at concentration of 320 µg/mL inhibiting both hyphal growth and zoospore production of L. thermophilum in 24 h. Toxicity tests were conducted using mud crab (Scylla tranquebarica) larva. Bath treatment of P. megacarpa at concentrations of 320 and 640 µg/mL for 24 h were highly effective against hyphae and zoospores of the strain and it is non-toxic to mud crab larva. Therefore, crude extracts P. megacarpa may be used as alternative treatment for marine Oomycete infection of mud crab.
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Affiliation(s)
- Kishio Hatai
- Microbiology and Fish Disease Laboratory, Borneo Marine Research Institute, Universiti Malaysia Sabah
| | - Takashi Kamada
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah
| | - Lik-Ming Lau
- Microbiology and Fish Disease Laboratory, Borneo Marine Research Institute, Universiti Malaysia Sabah
| | - Julius Kulip
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah
| | - Chin-Soon Phan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah
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40
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Isaka Y, Etani H, Kimura K, Yoneda S, Kamada T, Kozuka T, Nobuhara M, Uehara A. Binding of 131I-Labeled Tissue-Type Plasminogen Activator on De-Endothelialized Lesions in Rabbits. Nuklearmedizin 2018. [DOI: 10.1055/s-0038-1628893] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Tissue-type plasminogen activator (t-PA) which has a high affinity for fibrin in the clot, was labeled with 131I by the iodogen method, and its binding to de-endothelialized lesions in the rabbit was measured to assess the detectability of thrombi. The de-endothelialized lesion was induced in the abdominal aorta with a Fogarty 4F balloon catheter. Two hours after the de-endothelialization, 131I-labeled t-PA (125 ± 46 μCi) was injected intravenously. The initial half-life of the agent in blood (n = 12) was 2.9 ± 0.4 min. The degree of binding of 131I-labeled t-PA to the de-endothelialized lesion was evaluated at 15 min (n = 6) or at 30 min (n = 6) after injection of the agent. In spite of the retention of the biochemical properties of 131I-labeled t-PA and the presence of fibrin deposition at the de-endothelialized lesion, the binding of t-PA to the lesion was not sufficiently strong. Lesion-to-control ratios (cpm/g/cpm/g) were 1.65 ± 0.40 (at 15 min) and 1.39 ± 1.31 (at 30 min), and lesion-to-blood ratios were 1.39 ± 0.32 (at 15 min) and 1.36 ± 0.23 (at 30 min). These results suggest that radiolabeled t-PA may be inappropriate as a radiopharmaceutical for the scintigraphic detection of a pre-existing thrombotic lesion.
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Abstract
One new cembrane diterpene, (1 S, 2 E, 4 R, 6 E, 8 S, 11 S, 12 S)-11,12-epoxy-8-hydroperoxy-4-hydroxy-2,6-cembradiene (1) was isolated from a population of Bornean soft coral genus Sarcophyton collected from the coastal waters Bohey Dulang, Sabah, Malaysia. Its structure was elucidated based on extensive spectroscopic analysis including NMR and HRESIMS spectra. Cytotoxic, anti-inflammatory and antibacterial activities were tested.
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Affiliation(s)
- Takashi Kamada
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Intan Irna Zanil
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Chin-Soon Phan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
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Abstract
One new cembrane, ent -sinuflexibilin D (1), along with seven known compounds (2-8) were isolated from a population of Bornean soft coral Sinularia flexibilis. Their structures were elucidated on the basis of spectroscopic analyses. Cytotoxicity and antifungal activities of these compounds were evaluated in vitro. In addition, muurolene 7 was first isolates from a marine source.
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Affiliation(s)
- Takashi Kamada
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Chin-Soon Phan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Toshiyuki Hamada
- Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan
| | - Kishio Hatai
- Microbiology and Fish Disease Laboratory, Borneo Marine Research Institute, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Charles Santhanaraju Vairappan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
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44
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Abstract
A new guaiane-type sesquiterpenoid, 10β- O-methyl-1αH,5αH-guaia-6-en-4β-ol (1) along with two known compounds, 10- O -methyl alismoxide (2) and alismoxide (3) were isolated from a population of Bornean soft coral Xenia stellifera. The structure of this metabolite was elucidated based on spectroscopic data such as NMR and HRESIMS. These compounds were evaluated for their biological activity against adult T-cell leukemia cell line.
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Affiliation(s)
- Chin-Soon Phan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Takashi Kamada
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Takahiro Ishii
- Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan
| | - Toshiyuki Hamada
- Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan
| | - Charles Santhanaraju Vairappan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
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Phan CS, Kamada T, Ishii T, Hamada T, Vairappan CS. 12-Epi-9-deacetoxyxenicin, new cytotoxic diterpenoid from a Bornean soft coral, Xenia sp. Nat Prod Res 2017; 33:808-813. [DOI: 10.1080/14786419.2017.1410812] [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: 12/20/2022]
Affiliation(s)
- Chin-Soon Phan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah , Kota Kinabalu, Malaysia
| | - Takashi Kamada
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah , Kota Kinabalu, Malaysia
| | - Takahiro Ishii
- Faculty of Agriculture, Department of Bioscience and Biotechnology, University of the Ryukyus , Nishihara, Japan
| | - Toshiyuki Hamada
- Graduate School of Science and Engineering, Kagoshima University , Kagoshima, Japan
| | - Charles Santhanaraju Vairappan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah , Kota Kinabalu, Malaysia
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Ng SY, Kamada T, Suleiman M, Vairappan CS. Two new clerodane-type diterpenoids from Bornean liverwort Gottschelia schizopleura and their cytotoxic activity. Nat Prod Res 2017; 32:1832-1837. [PMID: 29156972 DOI: 10.1080/14786419.2017.1405409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The Bornean liverwort Gottschelia schizopleura was investigated phytochemically for the first time. Two new and four previously known clerodane-type diterpenoids were isolated from the MeOH extract of G. schizopleura through a series of chromatographic techniques. The structures of the new metabolites were established by analyses of their spectroscopic data (1D NMR, 2D NMR, HRESIMS and IR). All the isolated compounds 1-6 were tested against human promyelocytic leukaemia (HL-60), human colon adenocarcinoma (HT-29) and Mus musculus skin melanoma (B16-F10). Compound 1 and 2 showed active inhibition against HL-60 and B16-F10 cells.
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Affiliation(s)
- Shean-Yeaw Ng
- a Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation , Universiti Malaysia Sabah , Kota Kinabalu , Malaysia
| | - Takashi Kamada
- a Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation , Universiti Malaysia Sabah , Kota Kinabalu , Malaysia
| | - Monica Suleiman
- a Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation , Universiti Malaysia Sabah , Kota Kinabalu , Malaysia
| | - Charles Santhanaraju Vairappan
- a Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation , Universiti Malaysia Sabah , Kota Kinabalu , Malaysia
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Kamada T, Phan CS, Vairappan CS. New anti-bacterial halogenated tricyclic sesquiterpenes from Bornean Laurencia majuscula (Harvey) Lucas. Nat Prod Res 2017; 33:464-471. [DOI: 10.1080/14786419.2017.1396593] [Citation(s) in RCA: 8] [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: 12/22/2022]
Affiliation(s)
- Takashi Kamada
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
| | - Chin-Soon Phan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
| | - Charles Santhanaraju Vairappan
- Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
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Teshima K, Lee J, To H, Kamada T, Tazumi A, Hirano H, Maruyama M, Ogawa T, Nagai S, Turni C, Tsutsumi N. Application of an enzyme-linked immunosorbent assay for detection of antibodies to Actinobacillus pleuropneumoniae serovar 15 in pig sera. J Vet Med Sci 2017; 79:1968-1972. [PMID: 29070770 PMCID: PMC5745173 DOI: 10.1292/jvms.17-0374] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
An indirect enzyme-linked immunosorbent assay (ELISA) using lipopolysaccharide extract as
antigen was evaluated for detection of antibodies to Actinobacillus
pleuropneumoniae serovar 15. The serovar 15 ELISA had a higher sensitivity and
specificity than latex agglutination test for 63 and 80 sera from pigs experimentally
infected and not infected with A. pleuropneumoniae, respectively. When
the serovar 15 ELISA was applied to 454 field sera, high rates of seropositivity were
found in pigs from farms infected with A. pleuropneumoniae serovar 15,
but not in those from farms free of A. pleuropneumoniae serovar 15. The
results suggest that the serovar 15 ELISA may be useful for the serological surveillance
of infection with A. pleuropneumoniae serovar 15.
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Affiliation(s)
- Kaho Teshima
- Nippon Institute for Biological Science, 9-2221-1, Shinmachi, Ome, Tokyo 198-0024, Japan
| | - Jina Lee
- Nippon Institute for Biological Science, 9-2221-1, Shinmachi, Ome, Tokyo 198-0024, Japan
| | - Ho To
- Nippon Institute for Biological Science, 9-2221-1, Shinmachi, Ome, Tokyo 198-0024, Japan
| | - Takashi Kamada
- Nippon Institute for Biological Science, 9-2221-1, Shinmachi, Ome, Tokyo 198-0024, Japan
| | - Akihiro Tazumi
- Nippon Institute for Biological Science, 9-2221-1, Shinmachi, Ome, Tokyo 198-0024, Japan
| | - Haruna Hirano
- Yamanashi Prefecture Eastern Livestock Hygiene Service Center, 1001-1 Karakashiwa, Ishiwa, Fuefuki, Yamanashi 406-0034, Japan
| | - Minoru Maruyama
- Yamanashi Prefecture Livestock Dairy Technology Center, 963-1, Otokuro, Chuou, Yamanashi 409-3812, Japan
| | - Torata Ogawa
- Fukuoka Prefecture Central Livestock Hygiene Service Center, 4-14-5, Hakozakihutou, Higashi, Fukuoka, Fukuoka 812-0051, Japan
| | - Shinya Nagai
- Nippon Institute for Biological Science, 9-2221-1, Shinmachi, Ome, Tokyo 198-0024, Japan
| | - Conny Turni
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Ecosciences Precinct, Dutton Park, QLD, Australia
| | - Nobuyuki Tsutsumi
- Nippon Institute for Biological Science, 9-2221-1, Shinmachi, Ome, Tokyo 198-0024, Japan
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Ebner D, Shinoto M, Kawashiro S, Isozaki Y, Kamada T, Yamada S. Phase 1/2 Trial of Preoperative Short-Course Carbon-Ion Radiation Therapy for Patients With Resectable Pancreatic Cancer. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.334] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Yamada S, Kamada T, Kawashiro S, Isozaki Y, Ebner D. Update on Carbon-Ion Radiation Therapy for Patients With Pelvic Recurrence of Rectal Cancer. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1081] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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