1
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Kimura KI, Kumano R, Yamamoto D. Activin is a neural inducer of a male-specific muscle in Drosophila. Sci Rep 2024; 14:3740. [PMID: 38355873 PMCID: PMC10866940 DOI: 10.1038/s41598-024-54295-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 02/11/2024] [Indexed: 02/16/2024] Open
Abstract
Drosophila melanogaster has a pair of male-specific muscles called the muscle of Lawrence (MOL) in abdominal segment 5 (A5) of adult flies. The MOL is produced only when its innervating motoneuron expresses FruitlessM (FruM) neural masculinizing proteins. We show that MOL induction is hampered by: (1) silencing electrical activities in the motoneuron, (2) blocking vesicular release from the motoneuron, and (3) knocking down Activin ß (Actß) in the motoneuron or knocking down Actß signaling pathway components in the myoblasts. Our timelapse live imaging of the developing neuromuscular system reveals that, upon contact with the presumptive MOL, the motoneuronal axon retracts concomitant with the progression of MOL degeneration resulting from neural silencing. We conclude that MOL formation depends on the bidirectional trophic interactions between pre- and postsynaptic cells, with motoneuron-derived Actß playing an inducing role in MOL formation.
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Affiliation(s)
- Ken-Ichi Kimura
- Laboratory of Biology, Sapporo Campus, Hokkaido University of Education, Sapporo, 002-8502, Japan.
| | - Rimi Kumano
- Laboratory of Biology, Sapporo Campus, Hokkaido University of Education, Sapporo, 002-8502, Japan
| | - Daisuke Yamamoto
- Advanced ICT Research Institute, National Institute of Information and Communications Technology, Kobe, 651-2492, Japan
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2
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Usukhbayar N, Uesugi S, Kimura KI. 3,6-Epidioxy-1,10-bisaboladiene and sulfasalazine synergistically induce ferroptosis-like cell death in human breast cancer cell lines. Biosci Biotechnol Biochem 2023; 87:1336-1344. [PMID: 37604790 DOI: 10.1093/bbb/zbad117] [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: 04/29/2023] [Accepted: 08/15/2023] [Indexed: 08/23/2023]
Abstract
3,6-Epidioxy-1,10-bisaboladiene (EDBD) is an endoperoxide compound isolated from edible wild plants that induces iron-dependent ferroptosis-like cell death in HL-60 cells by decreasing the expression of GPX4 and glutathione. In contrast, sulfasalazine (SSZ), a clinically used anti-inflammatory drug, induces ferroptosis through the system xc-. In this study, we investigated the synergistic effects of these 2 compounds on 3 human breast cancer cell lines (HBC-5, MCF-7, and MDA-MB-231). EDBD-induced cell death was relieved by the lipid peroxidation inhibitor ferrostatin-1 and the iron chelator deferoxamine mesylate (DFOM), indicating that EDBD induced ferroptosis-like cell death. Moreover, cotreatment with EDBD and SSZ synergistically induced cell death in all 3 cell lines. Because the cytotoxicity of the cotreatment was inhibited by DFOM and ferrostatin-1, the combination of EDBD and SSZ synergistically induced ferroptosis. Collectively, EDBD enhanced the effects of SSZ as a clinical anti-inflammatory and anticancer drug candidate.
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Affiliation(s)
- Narandulam Usukhbayar
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Japan
| | - Shota Uesugi
- Department of Bioresource Sciences, Iwate Biotechnology Research Center, Kitakami, Japan
| | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Japan
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3
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Yano A, Yuki S, Shiraishi A, Hakozaki M, Kanno Y, Kimura KI, Uesugi S. Golden berry leaf extract containing withanolides suppresses TNF-α and IL-17 induced IL-6 expression in HeLa Cells. Biosci Biotechnol Biochem 2023; 87:972-980. [PMID: 37279446 DOI: 10.1093/bbb/zbad070] [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: 03/28/2023] [Accepted: 05/29/2023] [Indexed: 06/08/2023]
Abstract
Inflammation, characterized by the overexpression of IL-6 in various tissues, has been reported as a symptom of coronavirus disease 2019. In this study, we established an experimental system for overexpression of IL-6 in HeLa cells stimulated by TNF-α and IL-17, along with identification of anti-inflammatory materials and components from local agricultural, forestry, and fishery resources. We constructed a library of extracts from natural sources, of which 111 samples were evaluated for their anti-inflammatory activities. The MeOH extract of Golden Berry (Physalis peruviana L) leaf was found to exhibit strong anti-inflammatory properties (IC50 = 4.97 µg/mL). Preparative chromatography identified two active constituents, 4β-hydroxywithanolide E (4β-HWE) (IC50 = 183 nM) and withanolide E (WE) (IC50 = 65.1 nM). Withanolides are known anti-inflammatory ingredients of Withania somnifera, an Ayurvedic herbal medicine. P. peruviana leaves containing 4β-HWE and WE should be considered as useful natural resources for anti-inflammatory products.
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Affiliation(s)
- Akira Yano
- Iwate Biotechnology Research Center, Kitakami, Iwate, Japan
| | - Sayaka Yuki
- Iwate Biotechnology Research Center, Kitakami, Iwate, Japan
| | | | | | - Yuko Kanno
- Iwate Biotechnology Research Center, Kitakami, Iwate, Japan
| | - Ken-Ichi Kimura
- Department of Biological Chemistry and Food Science, Faculty of Agriculture, Iwate University, Morioka, Japan
| | - Shota Uesugi
- Iwate Biotechnology Research Center, Kitakami, Iwate, Japan
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4
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Usukhbayar N, Takano Y, Uesugi S, Muroi M, Osada H, Kimura KI. 3,6-Epidioxy-1,10-bisaboladiene induces ferroptosis-like cell death through lipid peroxidation. Free Radic Res 2023:1-34. [PMID: 37347979 DOI: 10.1080/10715762.2023.2229005] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/24/2023]
Abstract
3,6-Epidioxy-1,10-bisaboladiene (EDBD) is a bisabolane sesquiterpene endoperoxide that was isolated from an edible wild plant in Japan, Cacalia delphiniifolia. It showed partially apoptotic cell death through caspase activation against HL-60 cells. However, almost all of the cells had necrotic morphology. Thus, we examined the mechanism of action of EDBD on necrotic cell death. EDBD induced ferrous ion-dependent cell death which causes cell membrane damage, and its cell death form was like H2O2-induced necrosis in HL-60 cells. The oxidative stress-induced necrosis inhibitor IM-54 prevented EDBD-induced cell death, but it was not blocked by either caspase inhibitor, z-VAD-fmk, or necroptosis inhibitor, necrostatin-1. Furthermore, EDBD induced lipid peroxidation in a time- and dose-dependent manner and was inhibited with both ferrostatin-1 and α-tocopherol. EDBD also downregulated GPX4, the primary cell defense protein against lipid peroxidation, and decreased GSH levels. Taken together, these results suggest that EDBD induces ferrous ion-dependent ferroptosis-like cell death through lipid peroxidation.HighlightsEDBD induces cell death accompanied by cell membrane damage.EDBD caused lipid peroxidation against HL-60 cells and cell death is suppressed by inhibitors of lipid peroxidation.EDBD-induced lipid peroxidation was potentiated by adding ferrous ions and relieved by adding iron chelators or inhibitors of lipid peroxidation.EDBD downregulated the protein expression of GPX4 and decreased intracellular GSH levels.Overall, EDBD-induced cell death is characterized as ferroptosis-like cell death.
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Affiliation(s)
- Narandulam Usukhbayar
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka 020-8550, Japan
| | - Yukie Takano
- Graduate School of Agriculture, Iwate University, Morioka 020-8550, Japan
| | - Shota Uesugi
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka 020-8550, Japan
- Iwate Biotechnology Research Center, Kitakami 024-0003, Japan
| | | | | | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka 020-8550, Japan
- Graduate School of Agriculture, Iwate University, Morioka 020-8550, Japan
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5
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Paulin DA, Koseki T, Usukhbayar N, Kimura KI, Shiono Y. Cytotoxicity and Induction of G1 Phase Cell Cycle Arrest in human acute promyelocytic leukemia HL60 cells by indole alkaloids isolated from Dialium corbisieri seeds. Biosci Biotechnol Biochem 2023:7181479. [PMID: 37245061 DOI: 10.1093/bbb/zbad067] [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] [Indexed: 05/29/2023]
Abstract
The phytochemical investigation of Dialium corbisieri seeds led to the isolation of five monoterpenoid indole alkaloids along with a phytoserotonin, 1-6 and among the known compounds, the spectroscopic data of (5S)-methoxy-akuammiline (1) was reported for the first time. The structures were elucidated based on NMR spectroscopic techniques such as UV, IR, HRESITOFMS, and ECD spectrum calculations. The isolated compounds were evaluated for their cytotoxicity and cell progression in the human acute promyelocytic leukemia HL60 cell line.
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Affiliation(s)
- Dradre Atakuru Paulin
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
- Department of Agricultural Research and Training, Min.Agri, Blv.30 Juin-Batetela, Kinshasa-01204, D.R.Congo
| | - Takuya Koseki
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | - Narandulam Usukhbayar
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Yoshihito Shiono
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
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6
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Kishibata S, Tanaka K, Saito T, Kimura KI, Yajima A. Synthesis and structure-activity relationship of kujigamberol B, a dinorlabdane diterpenoid isolated from an ancient Kuji amber. Biosci Biotechnol Biochem 2023; 87:575-583. [PMID: 36898670 DOI: 10.1093/bbb/zbad027] [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: 02/14/2023] [Accepted: 03/03/2023] [Indexed: 03/12/2023]
Abstract
The versatile methodology was developed for synthesizing kujigamberol B, a dinorlabdane diterpenoid isolated from the methanol extract of Kuji amber. A highly efficient intramolecular cyclization is followed by a Sonogashira-coupling reaction during the total synthesis. The synthesized compounds were evaluated for the growth-restoring activity against the mutant yeast (zds1Δ erg3Δ pdr1Δ pdr3Δ) and for the degranulation of RBL-2H3 cells. We found that in both the activities, a primary alcohol and a secondary alcohol analogs are as active as kujigamberol B.
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Affiliation(s)
- Sakura Kishibata
- Graduate School of Life Sciences, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo, Japan
| | - Kurumi Tanaka
- Chemical Biology Laboratory, Graduate School of Arts and Sciences, Iwate University, Morioka, Japan
| | - Tatsuo Saito
- Department of Chemistry for Life Sciences and Agriculture, Faculty of Life Sciences, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo, Japan
| | - Ken-Ichi Kimura
- Chemical Biology Laboratory, Graduate School of Arts and Sciences, Iwate University, Morioka, Japan
| | - Arata Yajima
- Department of Chemistry for Life Sciences and Agriculture, Faculty of Life Sciences, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo, Japan
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7
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Uesugi S, Hakozaki M, Kanno Y, Takahashi Y, Shindo K, Kimura KI, Yano A. Anti-melanogenic effect of furanoeremophilanes identified from edible wild plants belonging to the genus Cacalia. Biosci Biotechnol Biochem 2022; 86:1462-1466. [PMID: 35867866 DOI: 10.1093/bbb/zbac124] [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: 06/08/2022] [Accepted: 07/09/2022] [Indexed: 11/14/2022]
Abstract
Cacalia delphiniifolia and C. hastata are edible wild plants in Japan. We found that these plants have anti-melanogenic activity in B16F10 mouse melanoma cells. Three furanoeremophilanes, cacalol (from C. delphiniifolia), dehydrocacalohastin, and cacalohastin (from C. hastata), were identified as the main active components. The genus Cacalia may be a good source of beneficial materials with anti-melanogenic effects.
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Affiliation(s)
- Shota Uesugi
- Iwate Biotechnology Research Center, Kitakami, Iwate, Japan
| | | | - Yuko Kanno
- Iwate Biotechnology Research Center, Kitakami, Iwate, Japan
| | - Yuta Takahashi
- Graduate School of Agriculture, Iwate University, Morioka, Iwate, Japan
| | - Kazutoshi Shindo
- Department of Food and Nutrition, Japan Women's University, Bunkyo-ku, Tokyo, Japan
| | - Ken-Ichi Kimura
- Graduate School of Agriculture, Iwate University, Morioka, Iwate, Japan
| | - Akira Yano
- Iwate Biotechnology Research Center, Kitakami, Iwate, Japan
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8
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Sofian FF, Suzuki T, Supratman U, Harneti D, Maharani R, Salam S, Abdullah FF, Koseki T, Tanaka K, Kimura KI, Shiono Y. Cochlioquinone derivatives produced by coculture of endophytes, Clonostachys rosea and Nectria pseudotrichia. Fitoterapia 2021; 155:105056. [PMID: 34626738 DOI: 10.1016/j.fitote.2021.105056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/30/2021] [Accepted: 10/03/2021] [Indexed: 11/18/2022]
Abstract
Three new meroterpenoid derivatives, furanocochlioquinol (1) and furanocochlioquinone (2), as well as nectrianolin D (3), together with two known biogenetically related compounds 4 and 5 were isolated from a mixed culture of two mangrove-derived fungi, Clonostachys rosea B5-2 and Nectria pseudotrichia B69-1. The structures of 1-3 were deduced based on the interpretation of HRMS and NMR data. Compounds 1-5 exhibited cytotoxicity against human promyelocytic leukemia (HL60) cells with IC50 values ranging from 0.47 to 10.16 μM.
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Affiliation(s)
- Ferry Ferdiansyah Sofian
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Takuma Suzuki
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | - Unang Supratman
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia
| | - Desi Harneti
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia
| | - Rani Maharani
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia
| | - Supriatno Salam
- Faculty of Pharmacy, Universitas Mulawarman, Samarinda 75123, Kalimantan Timur, Indonesia
| | - Fajar Fauzi Abdullah
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Garut, Garut 44151, Indonesia
| | - Takuya Koseki
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | - Kurumi Tanaka
- Graduate School of Arts and Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Graduate School of Arts and Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Yoshihito Shiono
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan.
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9
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Fukuhara S, Tanigaki R, Kimura KI, Kataoka T. Corrigendum to "Kujigamberol interferes with pro-inflammatory cytokine-induced expression of and N-glycan modifications to cell adhesion molecules at different stages in human umbilical vein endothelial cells" [Int. Immunopharmacol. 62 (2018) 313-325]. Int Immunopharmacol 2021; 99:107992. [PMID: 34330057 DOI: 10.1016/j.intimp.2021.107992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Sayuri Fukuhara
- Department of Applied Biology, Kyoto Institute of Technology, Kyoto 606-8585, Japan
| | - Riho Tanigaki
- Department of Applied Biology, Kyoto Institute of Technology, Kyoto 606-8585, Japan
| | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka 020-8550, Japan
| | - Takao Kataoka
- Department of Applied Biology, Kyoto Institute of Technology, Kyoto 606-8585, Japan; The Center for Advanced Insect Research Promotion (CAIRP), Kyoto Institute of Technology, Kyoto 606-8585, Japan.
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10
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Uesugi S, Hakozaki M, Kanno Y, Takahashi H, Kudo Y, Kimura KI, Yamada H, Yano A. A yeast-based screening system identified bakkenolide B contained in Petasites japonicus as an inhibitor of interleukin-2 production in a human T cell line. Biosci Biotechnol Biochem 2021; 85:2153-2160. [PMID: 34251393 DOI: 10.1093/bbb/zbab130] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Accepted: 07/02/2021] [Indexed: 01/13/2023]
Abstract
Ca2+ signaling is related to various diseases such as allergies, diabetes, and cancer. We explored Ca2+ signaling inhibitors in natural resources using a yeast-based screening method, and found bakkenolide B from the flower buds of edible wild plant, Petasites japonicus, using the YNS17 strain (zds1Δ erg3Δ pdr1/3Δ). Bakkenolide B exhibited growth-restoring activity against the YNS17 strain and induced Li+ sensitivity of wild-type yeast cells, suggesting that it inhibits the calcineurin pathway. Additionally, bakkenolide B inhibited interleukin-2 production at gene and protein levels in Jurkat cells, a human T cell line, but not the in vitro phosphatase activity of human recombinant calcineurin, an upstream regulator of interleukin-2 production. Furthermore, bakkenolide A showed weak activity in YNS17 and Jurkat cells compared with bakkenolide B. These findings revealed new biological effects and the structure-activity relationships of bakkenolides contained in Petasites japonicus as inhibitors of interleukin-2 production in human T cells.
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Affiliation(s)
- Shota Uesugi
- Iwate Biotechnology Research Center, Kitakami, Iwate 024-0003, Japan
| | - Mayuka Hakozaki
- Iwate Biotechnology Research Center, Kitakami, Iwate 024-0003, Japan
| | - Yuko Kanno
- Iwate Biotechnology Research Center, Kitakami, Iwate 024-0003, Japan
| | - Honoka Takahashi
- Graduate School of Arts and Sciences, Graduate Course in Biological Chemistry and Food Science, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Yui Kudo
- Graduate School of Arts and Sciences, Graduate Course in Biological Chemistry and Food Science, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Ken-Ichi Kimura
- Graduate School of Arts and Sciences, Graduate Course in Biological Chemistry and Food Science, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Hidetoshi Yamada
- Iwate Biotechnology Research Center, Kitakami, Iwate 024-0003, Japan.,Department of Life & Health Sciences, Teikyo University of Science, Adachi-ku, Tokyo 120-0045, Japan
| | - Akira Yano
- Iwate Biotechnology Research Center, Kitakami, Iwate 024-0003, Japan
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11
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Aoki S, Aboshi T, Onodera T, Kimura KI, Arai D, Iizuka Y, Murayama T. Omphaloprenol A: a new bioactive polyisoprenepolyol isolated from the mycelium of poisonous mushroom Omphalotus japonicus. Biosci Biotechnol Biochem 2021; 85:1364-1370. [PMID: 33851984 DOI: 10.1093/bbb/zbab063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 04/01/2021] [Indexed: 11/13/2022]
Abstract
Mushrooms of the Omphalotus genus are known to be rich in secondary metabolites. In the quest for new bioactive compounds, we analyzed the compounds isolated from the mycelium of the poisonous mushroom Omphalotus japonicus. As a result, a new polyisoprenepolyol, which was named omphaloprenol A, was identified, along with known substances such as hypsiziprenol A10 and A11, illudin S, and ergosterol. The chemical structure of omphaloprenol A was elucidated by nuclear magnetic resonance and infrared spectroscopies and mass spectrometry, and its bioactivity was investigated. Omphaloprenol A showed growth promoting activity against the root of lettuce seeds and cytotoxicity against HL60 cells. To the best of our knowledge, this is the first report on the isolation of a polyisoprenepolyol compound from Omphalotaceae mushrooms.
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Affiliation(s)
- Satoki Aoki
- The United Graduate School of Agricultural Science, Iwate University, Morioka, Iwate, Japan
| | - Takako Aboshi
- The United Graduate School of Agricultural Science, Iwate University, Morioka, Iwate, Japan
- Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata, Japan
| | - Takumu Onodera
- Graduate School of Arts and Sciences, Graduate Course in Biological Chemistry and Food Science, Iwate University, Morioka, Iwate, Japan
| | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Science, Iwate University, Morioka, Iwate, Japan
- Graduate School of Arts and Sciences, Graduate Course in Biological Chemistry and Food Science, Iwate University, Morioka, Iwate, Japan
| | - Daisuke Arai
- Field Science Center, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata, Japan
| | - Yoshiaki Iizuka
- Field Science Center, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata, Japan
| | - Tetsuya Murayama
- The United Graduate School of Agricultural Science, Iwate University, Morioka, Iwate, Japan
- Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata, Japan
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12
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Akabane S, Oue N, Sekino Y, Asai R, Thang PQ, Taniyama D, Sentani K, Yukawa M, Toda T, Kimura KI, Egi H, Shimizu W, Ohdan H, Yasui W. KIFC1 regulates ZWINT to promote tumor progression and spheroid formation in colorectal cancer. Pathol Int 2021; 71:441-452. [PMID: 33819373 DOI: 10.1111/pin.13098] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 01/12/2021] [Accepted: 03/12/2021] [Indexed: 02/02/2023]
Abstract
Colorectal cancer (CRC) is the second leading cause of cancer-related mortality worldwide. Kinesin Family Member C1 (KIFC1) has been proposed as a promising therapeutic target due to its pivotal role in centrosome clustering to mediate cancer cell progression. This study aimed to analyze the expression and biological function of KIFC1 in CRC. Immunohistochemically, 67 (52%) of 129 CRC cases were positive for KIFC1 and statistically associated with poorer overall survival. KIFC1 small interfering RNA (siRNA)-transfected cells demonstrated lower cell proliferation as compared to the negative control cells. A specific KIFC1 inhibitor, kolavenic acid analog (KAA) drastically inhibited CRC cell proliferation. Microarray analysis revealed that KAA-treated CRC cells presented reduced ZW10 interacting kinetochore protein (ZWINT) expression as compared to control cells. Immunohistochemical analysis demonstrated that 61 (47%) of 129 CRC cases were positive for ZWINT and ZWINT expression was significantly correlated with KIFC1 expression. ZWINT-positive cases exhibited significantly worse overall survival. KIFC1 siRNA-transfected cells showed reduced ZWINT expression while ZWINT siRNA-transfected cells decreased cell proliferation. Both KIFC1 and ZWINT knockdown cells attenuated spheroid formation ability. This study provides new insights into KIFC1 regulating ZWINT in CRC progression and its potential as a therapeutic target.
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Affiliation(s)
- Shintaro Akabane
- Department of Molecular Pathology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.,Department of Gastroenterological and Transplant Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Naohide Oue
- Department of Molecular Pathology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Yohei Sekino
- Department of Urology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Ryuichi Asai
- Department of Surgical Oncology, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Pham Quoc Thang
- Department of Molecular Pathology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Daiki Taniyama
- Department of Molecular Pathology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kazuhiro Sentani
- Department of Molecular Pathology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Masashi Yukawa
- Hiroshima Research Center for Healthy Aging, Department of Molecular Biotechnology, Graduate School of Integrated Sciences for Life, Hiroshima University, Hiroshima, Japan
| | - Takashi Toda
- Hiroshima Research Center for Healthy Aging, Department of Molecular Biotechnology, Graduate School of Integrated Sciences for Life, Hiroshima University, Hiroshima, Japan
| | - Ken-Ichi Kimura
- Chemical Biology Laboratory, Graduate School of Arts and Sciences, Iwate University, Iwate, Japan
| | - Hiroyuki Egi
- Department of Gastroenterological and Transplant Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Wataru Shimizu
- Department of Gastroenterological and Transplant Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Hideki Ohdan
- Department of Gastroenterological and Transplant Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Wataru Yasui
- Department of Molecular Pathology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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Kimura KI, Hosoda N. Crucial role of framework with cytoskeletal actin filaments for shaping microstructure of footpad setae in the ladybird beetle, Harmonia axyridis. Arthropod Struct Dev 2021; 60:100998. [PMID: 33249365 DOI: 10.1016/j.asd.2020.100998] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 09/24/2020] [Accepted: 09/29/2020] [Indexed: 06/12/2023]
Abstract
Insects that can walk on smooth surfaces have specialized structures, footpads, on their legs. Footpads play an important role in adhesion to the substrate surface. Although the morphology and function of footpads have been studied, the mechanism of their formation is still elusive. In the ladybird beetle (Harmonia axyridis), hairy footpads are present on the first and second tarsal segments of the legs. The footpads are covered with hundreds of hairs, i.e. setae, whose tips consist of four types: pointed, lanceolate, spatular, and discoidal. We examined the formation of the footpad during the pupal stage using immuno-staining and fluorescent-conjugated phalloidin staining. We found that a seta was composed of a shaft and a socket and some setae were accompanied by a neuron. By the mid-pupal stages, the shaft cells elongated to form a setal structure. Cytoskeletal actin bundles ramified to create a framework for the setal tip structure of the cells. We examined the effects of the application of cytochalasin D, which inhibits actin polymerization, on the formation of footpad setal structures. The results showed that the setal tips were deformed by the inhibition of actin polymerization. Our observations reveal that cytoskeletal actin filaments are involved in shaping the setae.
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Affiliation(s)
- Ken-Ichi Kimura
- Laboratory of Biology, Sapporo Campus, Hokkaido University of Education, Sapporo, 002-8502, Japan.
| | - Naoe Hosoda
- Research Center for Structural Materials, National Institute for Materials Science, Tsukuba, 305-0044, Japan
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14
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Kimura KI, Minami R, Yamahama Y, Hariyama T, Hosoda N. Framework with cytoskeletal actin filaments forming insect footpad hairs inspires biomimetic adhesive device design. Commun Biol 2020; 3:272. [PMID: 32472026 PMCID: PMC7260203 DOI: 10.1038/s42003-020-0995-0] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 04/29/2020] [Indexed: 12/16/2022] Open
Abstract
Footpads allow insects to walk on smooth surfaces. Specifically, liquid secretions on the footpad mediate adhesiveness through Van der Waals, Coulomb, and attractive capillary forces. Although the morphology and function of the footpad are well defined, the mechanism underlying their formation remains elusive. Here, we demonstrate that footpad hair in Drosophila is formed by the elongation of the hair cells and assembly of actin filaments. Knockdown of Actin5C caused a malformation of the hair structure, resulting in reduced ability to adhere to smooth substrates. We determined that functional footpads are created when hair cells form effective frameworks with actin filament bundles, thereby shaping the hair tip and facilitating cuticular deposition. We adapted this mechanism of microstructure formation to design a new artificial adhesive device—a spatula-like fiber-framed adhesive device supported by nylon fibers with a gel material at the tip. This simple self-assembly mechanism facilitates the energy-efficient production of low-cost adhesion devices. Kimura et al. demonstrate that footpad hair formation of Drosophila involves elongation of hair cells and assembly of actin filaments, followed by cuticular deposition. They then use this mechanism to design an artificial highly adhesive device with easy attachment and detachment properties.
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Affiliation(s)
- Ken-Ichi Kimura
- Laboratory of Biology, Sapporo Campus, Hokkaido University of Education, Sapporo, 002-8502, Japan.
| | - Ryunosuke Minami
- Laboratory of Biology, Sapporo Campus, Hokkaido University of Education, Sapporo, 002-8502, Japan
| | - Yumi Yamahama
- Department of Biology, Hamamatsu University School of Medicine, Hamamatsu, 431-3192, Japan
| | - Takahiko Hariyama
- Institute for NanoSuit Research, Preeminent Medical Photonics Education and Research Center, Hamamatsu University School of Medicine, Hamamatsu, 431-3192, Japan
| | - Naoe Hosoda
- Research Center for Structural Materials, National Institute for Materials Science, Tsukuba, 305-0044, Japan.
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15
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Yoshida J, Okawa Y, Oyama T, Shimoda N, Uesugi S, Takagi H, Ito Y, Kimura KI. Inhibition of Calcineurin and Glycogen Synthase Kinase-3β by Ricinoleic Acid Derived from Castor Oil. Lipids 2019; 55:89-99. [PMID: 31867745 DOI: 10.1002/lipd.12208] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 11/16/2019] [Accepted: 12/02/2019] [Indexed: 12/22/2022]
Abstract
Ricinoleic acid (RA) is the main fatty acid component of castor oil and was found to inhibit Ca2+ -signal transduction pathway-mediated cell cycle regulation in a yeast-based drug screening assay. RA is expected to have antidiabetic, antiallergy, and/or anticancer properties but its target molecule is unknown. To identify a novel pharmacological effect of RA, we investigated its target molecule in the Ca2+ -signal transduction pathway. RA inhibition of calcineurin (CN) was examined in a yeast-based CN inhibitor screening assay using the rsp5A401E mutant and in a phosphatase assay using recombinant human CN. RA showed growth-restoration activity at 5 μg/spot in the CN inhibitor screening assay with the rsp5A401E yeast strain. Furthermore, it directly inhibited CN without immunophilins at Ki = 33.7 μM in a substrate-competitive manner. The effects of RA on CN in mammalian cells were further evaluated by measuring β-hexosaminidase (β-HEX) release in RBL-2H3 cells. RA at 50 μM suppressed the release of β-HEX from RBL-2H3 cells. Moreover, this compound was found to inhibit glycogen synthase kinase-3β (GSK-3β), as determined by a kinase assay using recombinant human GSK-3β. RA inhibited GSK-3β at Ki = 1.43 μM in a peptide substrate-competitive manner. The inhibition of GSK-3β by this molecule was further assessed in mammalian cells by measuring the inhibition of glucose production in H4IIE rat hepatoma cells. RA at 25 μM suppressed glucose production in these cells. These findings indicate that RA and/or castor oil could be a useful functional fatty acid to treat allergy or type 2 diabetes.
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Affiliation(s)
- Jun Yoshida
- Center for Liberal Arts and Sciences, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba, 028-3694, Japan
| | - Yusuke Okawa
- Graduate School of Agriculture, Iwate University, Morioka, 020-8550, Japan
| | - Takuya Oyama
- Faculty of Agriculture, Iwate University, Morioka, 020-8550, Japan
| | - Nozomu Shimoda
- Graduate School of Agriculture, Iwate University, Morioka, 020-8550, Japan
| | - Shota Uesugi
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, 020-8550, Japan
| | - Hiroshi Takagi
- Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Nara, 630-0192, Japan
| | - Yoshiaki Ito
- Graduate School of Agriculture, Iwate University, Morioka, 020-8550, Japan.,Faculty of Agriculture, Iwate University, Morioka, 020-8550, Japan.,The United Graduate School of Agricultural Sciences, Iwate University, Morioka, 020-8550, Japan
| | - Ken-Ichi Kimura
- Graduate School of Agriculture, Iwate University, Morioka, 020-8550, Japan.,Faculty of Agriculture, Iwate University, Morioka, 020-8550, Japan.,The United Graduate School of Agricultural Sciences, Iwate University, Morioka, 020-8550, Japan
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16
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Uesugi S, Honmura Y, Nishiyama M, Kusakabe K, Tonouchi A, Yamashita T, Hashimoto M, Kimura KI. Identification of neomacrophorins isolated from Trichoderma sp. 1212-03 as proteasome inhibitors. Bioorg Med Chem 2019; 27:115161. [PMID: 31732281 DOI: 10.1016/j.bmc.2019.115161] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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: 07/17/2019] [Revised: 10/07/2019] [Accepted: 10/09/2019] [Indexed: 01/12/2023]
Abstract
Neomacrophorins I-III (1-3) and X have previously been isolated from Trichoderma sp. 1212-03. Their mode of action against cancer cells and the mechanism of biosynthesis of the characteristic [4.4.3] propellane framework in neomacrophorin X have not been reported. The isolation and characterization of neomacrophorins IV (4), V (5), and VI (6) is reported. Epoxyquinones 1, 4, and 6 potently induced apoptotic cell death in human acute promyelocytic leukemia HL60 cells, while epoxysemiquinols 2, 3, and 5 showed weak activity. This indicates that the epoxyquinone moiety is crucial for apoptosis-inducing activities of neomacrophorins. We also found that neomacrophorins inhibit proteasome in vitro, and 1, 4, and 6 induced significant accumulation of ubiquitinated proteins in HL60 cells. These activities were completely suppressed by a nucleophile, N-acetyl-l-cysteine (NAC). The analysis of reaction mechanisms using LC-MS suggested that C2' and C7' of neomacrophorins could be Michael acceptors in the reaction with NAC methyl ester (NACM). These findings indicated that the electrophilic properties of neomacrophorins are responsible for both their potent biological effects and the biosynthesis of unique [4.4.3] propellane framework in neomacrophorin X.
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Affiliation(s)
- Shota Uesugi
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Iwate Biotechnology Research Center, Kitakami, Iwate 024-0003, Japan
| | - Yuna Honmura
- Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Mami Nishiyama
- Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Kazuaki Kusakabe
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Akio Tonouchi
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Tetsuro Yamashita
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Masaru Hashimoto
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan.
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17
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Kawashima H, Toyooka N, Okada T, Nguyen HD, Nishikawa Y, Miura Y, Inoue N, Kimura KI. Identification and Total Synthesis of Two Previously Unreported Odd-Chain Bis-Methylene-Interrupted Fatty Acids with a Terminal Olefin that Activate Protein Phosphatase, Mg 2+/Mn 2+-Dependent 1A (PPM1A) in Ovaries of the Limpet Cellana toreuma. Mar Drugs 2019; 17:md17070410. [PMID: 31336763 PMCID: PMC6669709 DOI: 10.3390/md17070410] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 07/08/2019] [Accepted: 07/09/2019] [Indexed: 11/16/2022] Open
Abstract
Diverse non-methylene-interrupted (NMI) fatty acids (FAs) with odd-chain lengths have been recognized in triacylglycerols and polar lipids from the ovaries of the limpet Cellana toreuma, however their biological properties remain unclear. In this study, two previously unreported odd-chain NMI FAs, (12Z)-12,16-heptadecadienoic (1) and (14Z)-14,18-nonadecadienoic (2) acids, from the ovary lipids of C. toreuma were identified by a combination of equivalent chain length (ECL) values of their methyl esters and capillary gas chromatography-mass spectrometry (GC-MS) of their 3-pyridylcarbinol derivatives. On the basis of the experimental results, both 1 and 2 were synthesized to prove their structural assignments and to test their biological activity. The ECL values and electron impact-mass (EI-MS) spectra of naturally occurring 1 and 2 were in agreement with those of the synthesized 1 and 2. In an in vitro assay, both 1 and 2 activated protein phosphatase, Mg2+/Mn2+-dependent 1A (PPM1A) up to 100 μM in a dose-dependent manner.
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Affiliation(s)
- Hideki Kawashima
- Bioscience Laboratory, Miyako College Division, Iwate Prefectural University, Miyako, Iwate 027-0039, Japan.
| | - Naoki Toyooka
- Graduate School of Innovative Life Science, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
- Graduate School of Science and Engineering University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Takuya Okada
- Graduate School of Innovative Life Science, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Huy Du Nguyen
- Graduate School of Innovative Life Science, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Yuya Nishikawa
- Graduate School of Science and Engineering University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Yuka Miura
- Chemical Biology Laboratory, Graduate School of Arts and Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Nana Inoue
- Chemical Biology Laboratory, Graduate School of Arts and Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Ken-Ichi Kimura
- Chemical Biology Laboratory, Graduate School of Arts and Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
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18
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Uchida T, Koshino H, Abe J, Hakozaki M, Yamada H, Kimura KI. Isolation of yeast Ca 2+ signal transduction inhibitors from the Early Cretaceous Burmese amber. Fitoterapia 2019; 134:422-428. [PMID: 30858047 DOI: 10.1016/j.fitote.2019.02.018] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 02/20/2019] [Accepted: 02/20/2019] [Indexed: 11/25/2022]
Abstract
Two kinds of biologically active compounds were isolated from the MeOH extract of the Early Cretaceous Burmese amber [99 million years ago (Ma)], which is older than the K-Pg boundary (65 Ma). These compounds had inhibitory activity against the hypersensitive mutant yeast strain (zds1∆ erg3∆ pdr1∆ pdr3∆) with respect to Ca2+ signal transduction. They were identified as 16,17-bisnordehydroabietic acid (1) and 16,17-bisnorcallitrisic acid (2), respectively, on the basis of spectral analyses including HREIMS, 1D, and 2D NMR. Both have faint growth restoring activities around the clear inhibition zone against the mutant yeast on the 0.31-0.16 μg/spot. This is the first report of direct structural elucidation of 1 and 2 and the biologically active compounds derived from Burmese amber.
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Affiliation(s)
- Takeshi Uchida
- Graduate School of Agriculture, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Hiroyuki Koshino
- RIKEN Center for Sustainable Resource Science, Wako, Saitama 351-0198, Japan
| | - Junpei Abe
- Graduate School of Agriculture, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Mayuka Hakozaki
- Iwate Biotechnology Research Center, Kitakami, Iwate 024-0003, Japan
| | - Hidetoshi Yamada
- Iwate Biotechnology Research Center, Kitakami, Iwate 024-0003, Japan
| | - Ken-Ichi Kimura
- Graduate School of Agriculture, Iwate University, Morioka, Iwate 020-8550, Japan.
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19
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Shimizu E, Koshino H, Noro A, Maruyama M, Shimoda N, Uesugi S, Ohnishi M, Kimura KI. Isolation of a spirolactone norditerpenoid as a yeast Ca 2+ signal transduction inhibitor from Kuji amber and evaluation of its effects on PPM1A activity. Fitoterapia 2019; 134:290-296. [PMID: 30831200 DOI: 10.1016/j.fitote.2019.02.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 01/09/2019] [Revised: 02/20/2019] [Accepted: 02/26/2019] [Indexed: 01/18/2023]
Abstract
A different type of biologically active compound from Kuji amber (Late Cretaceous, Japan) before the K-Pg boundary [65 million years ago (Ma)] was isolated based on the growth-restoring activity of a mutant yeast involving Ca2+ signal transduction. It was identified as a spirolactone norditerpenoid, (4R*, 5S*, 8R*, 9R*, 10S*)-14,15,16,19-tetranor-labdan-13,9-olide (1) from spectral analyses with high-resolution electron ionization mass spectrometry (HREIMS), 1D and 2D nuclear magnetic resonance (NMR). Although the planar structure of 1 is known as an artificial derivative from marrubiin, it was isolated as a natural product from Kuji amber and its structure was elucidated for the first time. It had a growth-restoring activity against the mutant yeast through the direct or indirect inhibition of calcineurin activity [protein phosphatase, Mg2+/Mn2+-dependent 1A (PPM1A) activation]. Furthermore, the compound had potent inhibitory effect against the degranulation of rat basophilic leukemia 2H3 (RBL-2H3) cells.
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Affiliation(s)
- Eisaku Shimizu
- Chemical Biology Laboratory, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Hiroyuki Koshino
- RIKEN Center for Sustainable Resource Science, Wako, Saitama 351-0198, Japan
| | - Aoi Noro
- Chemical Biology Laboratory, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Miku Maruyama
- Chemical Biology Laboratory, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Nozomu Shimoda
- Chemical Biology Laboratory, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Shota Uesugi
- Chemical Biology Laboratory, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Motoko Ohnishi
- Department of Biological Chemistry, Chubu University, Kasugai, Aichi 487-8501, Japan
| | - Ken-Ichi Kimura
- Chemical Biology Laboratory, Iwate University, Morioka, Iwate 020-8550, Japan.
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20
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Suzuki T, Ariefta NR, Koseki T, Furuno H, Kwon E, Momma H, Harneti D, Maharani R, Supratman U, Kimura KI, Shiono Y. New polyketides, paralactonic acids A-E produced by Paraconiothyrium sp. SW-B-1, an endophytic fungus associated with a seaweed, Chondrus ocellatus Holmes. Fitoterapia 2018; 132:75-81. [PMID: 30496810 DOI: 10.1016/j.fitote.2018.11.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 06/22/2018] [Revised: 09/11/2018] [Accepted: 11/24/2018] [Indexed: 10/27/2022]
Abstract
Five polyketides, paralactonic acids A-E (1-5) were isolated from Paraconiothyrium sp. SW-B-1, an endophytic fungus isolated from the seaweed, Chondrus ocellatus Holmes. Their structures were determined by various spectroscopic methods, predominantly by 2D NMR spectroscopic analyses. The absolute configurations of compounds 1-5 were determined by comparison of the experimental and calculated ECD spectra. Compound 5 showed moderate antibacterial activity and restored the growth of a mutant yeast strain inhibited by hyperactivated Ca2+-signaling.
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Affiliation(s)
- Takuma Suzuki
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | - Nanang Rudianto Ariefta
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Takuya Koseki
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | - Hiroshi Furuno
- Green Asia Education Center, Kyushu University, 6-1 Kasuga-koen, Kasuga-city, Fukuoka 816-8580, Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - Hiroyuki Momma
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - Desi Harneti
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Sumedang 45363, Indonesia
| | - Rani Maharani
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Sumedang 45363, Indonesia
| | - Unang Supratman
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Sumedang 45363, Indonesia
| | - Ken-Ichi Kimura
- Graduate School of Arts and Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Yoshihito Shiono
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan; The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan.
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21
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Kimura KI, Urushizaki A, Sato C, Yamamoto D. A novel sex difference in Drosophila contact chemosensory neurons unveiled using single cell labeling. J Neurogenet 2018; 33:116-124. [PMID: 30457022 DOI: 10.1080/01677063.2018.1531858] [Citation(s) in RCA: 5] [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] [Indexed: 10/27/2022]
Abstract
Among the sensory modalities involved in controlling mating behavior in Drosophila melanogaster, contact sex pheromones play a primary role. The key receptor neurons for contact sex pheromones are located on the forelegs, which are activated in males upon touching the female abdomen during tapping events in courtship actions. A fruitless (fru)-positive (fru [+]) male-pheromone sensing cell (M-cell) and a fru [+] female-pheromone sensing cell (F-cell) are paired in a sensory bristle on the legs, and some fru [+] chemoreceptor axons project across the midline in the thoracic neuromere in males but not in females. However, the receptor cells that form sexually dimorphic axon terminals in the thoracic ganglia remain unknown. By generating labeled single-cell clones, we show that only a specific subset of fru [+] chemosensory neurons have axons that cross the midline in males. We further demonstrate that there exist two male-specific bristles, each harboring two chemosensory neurons; neither of which exhibits midline crossing, a masculine characteristic. This study reveals hitherto unrecognized sex differences in chemosensory neurons, imposing us to reinvestigate the pheromone input pathways that impinge on the central courtship circuit.
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Affiliation(s)
- Ken-Ichi Kimura
- a Laboratory of Biology , Hokkaido University of Education, Sapporo Campus , Sapporo , Japan
| | - Akira Urushizaki
- a Laboratory of Biology , Hokkaido University of Education, Sapporo Campus , Sapporo , Japan
| | - Chiaki Sato
- a Laboratory of Biology , Hokkaido University of Education, Sapporo Campus , Sapporo , Japan
| | - Daisuke Yamamoto
- b Neuro-Network Evolution Project, Advanced ICT Research Institute , National Institute of Information and Communications Technology , Kobe , Japan
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22
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Fukuhara S, Tanigaki R, Kimura KI, Kataoka T. Kujigamberol interferes with pro-inflammatory cytokine-induced expression of and N-glycan modifications to cell adhesion molecules at different stages in human umbilical vein endothelial cells. Int Immunopharmacol 2018; 62:313-325. [PMID: 30053729 DOI: 10.1016/j.intimp.2018.07.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 04/17/2018] [Revised: 07/11/2018] [Accepted: 07/17/2018] [Indexed: 12/13/2022]
Abstract
Kujigamberol is the norlabdane compound isolated from Kuji amber and has recently been shown to prevent Ca2+-signal transduction and exert anti-allergy effects in vitro and in vivo. However, the anti-inflammatory activities of kujigamberol remain unclear. In the present study, we investigated the biological activities of kujigamberol on cell adhesion molecules expressed on human umbilical vein endothelial cells (HUVEC) in response to pro-inflammatory cytokines. Kujigamberol decreased the molecular weight of intercellular adhesion molecule-1 (ICAM-1) by altering N-glycan modifications. In contrast to ICAM-1, kujigamberol reduced the interleukin-1α- or tumor necrosis factor α-induced expression of vascular cell adhesion molecule-1 (VCAM-1) and E-selectin at the mRNA and protein levels. Kujigamberol B, but not kujiol A, decreased the molecular weight of the ICAM-1 protein. Kujigamberol moderately inhibited yeast α-glucosidases, whereas it was only weakly inhibited by kujigamberol B and more weakly by kujiol A. Three compounds did not inhibit Jack bean α-mannosidases. The present results reveal new biological activities of kujigamberol, which interfere with the pro-inflammatory cytokine-induced expression of and N-glycan modifications to cell adhesion molecules in HUVEC.
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Affiliation(s)
- Sayuri Fukuhara
- Department of Applied Biology, Kyoto Institute of Technology, Kyoto 606-8585, Japan
| | - Riho Tanigaki
- Department of Applied Biology, Kyoto Institute of Technology, Kyoto 606-8585, Japan
| | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka 020-8550, Japan
| | - Takao Kataoka
- Department of Applied Biology, Kyoto Institute of Technology, Kyoto 606-8585, Japan; The Center for Advanced Insect Research Promotion (CAIRP), Kyoto Institute of Technology, Kyoto 606-8585, Japan.
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23
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Ariefta NR, Kristiana P, Aboshi T, Murayama T, Tawaraya K, Koseki T, Kurisawa N, Kimura KI, Shiono Y. New isocoumarins, naphthoquinones, and a cleistanthane-type diterpene from Nectria pseudotrichia 120-1NP. Fitoterapia 2018; 127:356-361. [PMID: 29621598 DOI: 10.1016/j.fitote.2018.03.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 03/12/2018] [Accepted: 03/31/2018] [Indexed: 12/25/2022]
Abstract
Four new compounds, namely, nectriapyrones A (2) and B (3), nectriaquinone B (5), and zythiostromic acid C (8), were isolated from the brown rice culture of Nectria pseudotrichia 120-1NP together with four known compounds (1, 4, 6, and 7). To the best of our knowledge, this is the first report of 4 from a natural source. Their structures were determined on the basis of 1D/2D-NMR spectroscopy and HRESITOFMS data. In addition, the absolute configuration of secondary alcohols in 8 were determined using modified Mosher's ester method. All isolated compounds were evaluated for their antimicrobials activity, phytotoxicity, and cytotoxicity.
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Affiliation(s)
- Nanang Rudianto Ariefta
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan.
| | - Priska Kristiana
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | - Takako Aboshi
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | - Tetsuya Murayama
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | - Keitaro Tawaraya
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | - Takuya Koseki
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | - Naoaki Kurisawa
- Graduate School of Arts and Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Graduate School of Arts and Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Yoshihito Shiono
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan.
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24
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Uchida T, Koshino H, Takahashi S, Shimizu E, Takahashi H, Yoshida J, Shinden H, Tsujimura M, Kofujita H, Uesugi S, Kimura KI. Ca 2+-Signal Transduction Inhibitors, Kujiol A and Kujigamberol B, Isolated from Kuji Amber Using a Mutant Yeast. J Nat Prod 2018; 81:1070-1074. [PMID: 29461846 DOI: 10.1021/acs.jnatprod.7b00922] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A podocarpatriene and a labdatriene derivative, named kujiol A [13-methyl-8,11,13-podocarpatrien-19-ol (1)] and kujigamberol B [15,20-dinor-5,7,9-labdatrien-13-ol (2)], respectively, were isolated from Kuji amber through detection with the aid of their growth-restoring activity against a mutant yeast strain ( zds1Δ erg3Δ pdr1Δ pdr3Δ), which is known to be hypersensitive with respect to Ca2+-signal transduction. The structures were elucidated by spectroscopic data analysis. Compounds 1 and 2 are rare organic compounds from Late Cretaceous amber, and the mutant yeast used seems useful for elucidating a variety of new compounds from Kuji amber specimens, produced before the K-Pg boundary.
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Affiliation(s)
- Takeshi Uchida
- Graduate School of Agriculture , Iwate University , Morioka, Iwate 020-8550 , Japan
| | - Hiroyuki Koshino
- RIKEN Center for Sustainable Resource Science , Wako, Saitama 351-0198 , Japan
| | - Shunya Takahashi
- RIKEN Center for Sustainable Resource Science , Wako, Saitama 351-0198 , Japan
| | - Eisaku Shimizu
- Graduate School of Agriculture , Iwate University , Morioka, Iwate 020-8550 , Japan
| | - Honoka Takahashi
- Faculty of Agriculture , Iwate University , Morioka, Iwate 020-8550 , Japan
| | - Jun Yoshida
- Center for Liberal Arts and Sciences , Iwate Medical University , Yahaba, Iwate 028-3694 , Japan
| | | | - Maiko Tsujimura
- The United Graduate School of Agricultural Sciences , Iwate University , Morioka, Iwate 020-8550 , Japan
| | - Hisayoshi Kofujita
- Graduate School of Agriculture , Iwate University , Morioka, Iwate 020-8550 , Japan
- Faculty of Agriculture , Iwate University , Morioka, Iwate 020-8550 , Japan
- The United Graduate School of Agricultural Sciences , Iwate University , Morioka, Iwate 020-8550 , Japan
| | - Shota Uesugi
- The United Graduate School of Agricultural Sciences , Iwate University , Morioka, Iwate 020-8550 , Japan
| | - Ken-Ichi Kimura
- Graduate School of Agriculture , Iwate University , Morioka, Iwate 020-8550 , Japan
- Faculty of Agriculture , Iwate University , Morioka, Iwate 020-8550 , Japan
- The United Graduate School of Agricultural Sciences , Iwate University , Morioka, Iwate 020-8550 , Japan
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25
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Tchoukoua A, Suzuki T, Ariefta NR, Koseki T, Okawa Y, Kimura KI, Shiono Y. A new eremophilane sesquiterpene from the fungus Xylaria sp. V-27 and inhibition activity against degranulation in RBL-2H3 cells. J Antibiot (Tokyo) 2017; 70:1129-1132. [PMID: 29066795 DOI: 10.1038/ja.2017.120] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 05/24/2017] [Accepted: 06/08/2017] [Indexed: 11/09/2022]
Abstract
A new eremophilane sesquiterpene, 13,13-dimethoxyintegric acid (1), together with known compound integric acid (2) have been isolated from a fungus, Xylaria sp. V-27, obtained from a dead branch. The structure of 1 was established by means of spectroscopic analyses. 1 and 2 promoted growth restoring activity against the mutant yeast strain (Saccharomyces cerevisiae (zds1Δ erg3Δ pdr1Δ pdr3Δ)) and inhibited degranulation of rat basophilic leukemia RBL-2H3 cells stimulated by immnunoglobulin G + 2,4-dinitrophenylated-bovine serum albumin (IgE+DNP-BSA), thapsigargin and A23187.
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Affiliation(s)
- Abdou Tchoukoua
- Department of Organic Chemistry, Faculty of Science, University of Yaounde I, Yaounde, Cameroon
| | - Takuma Suzuki
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Yamagata, Japan
| | - Nanang Rudianto Ariefta
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Yamagata, Japan.,The United Graduate School of Agricultural Sciences, Iwate University, Iwate, Japan
| | - Takuya Koseki
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Yamagata, Japan
| | - Yusuke Okawa
- Graduate School of Agriculture, Iwate University, Iwate, Japan
| | - Ken-Ichi Kimura
- Graduate School of Agriculture, Iwate University, Iwate, Japan
| | - Yoshihito Shiono
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Yamagata, Japan.,The United Graduate School of Agricultural Sciences, Iwate University, Iwate, Japan
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26
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Shiono Y, Muslihah NI, Suzuki T, Ariefta NR, Anwar C, Nurjanto HH, Aboshi T, Murayama T, Tawaraya K, Koseki T, Yoshida J, Usukhbayar N, Uesugi S, Kimura KI. New eremophilane and dichlororesorcinol derivatives produced by endophytes isolated from Ficus ampelas. J Antibiot (Tokyo) 2017; 70:1133-1137. [PMID: 29066796 DOI: 10.1038/ja.2017.125] [Citation(s) in RCA: 4] [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] [Received: 07/19/2017] [Revised: 09/04/2017] [Accepted: 09/07/2017] [Indexed: 11/09/2022]
Abstract
The novel compound, 11-O-methylpetasitol (1), was isolated from Penicillium sp. N-175-1, and two new compounds, cosmochlorins D (5) and E (6), were isolated from Phomopsis sp. N-125. In addition, three known eremophilane sesquiterpenes, sporogen-AO1 (2), petasol (3) and 6-dehydropetasol (4), were isolated from Penicillium sp. N-175-1. The structures of 1, 5 and 6 were elucidated by a combination of extensive spectroscopic analyses, including 2D NMR, high-resolution electrospray ionization time-of-flight mass spectrometry (HRESITOFMS) and chemical reactions. Compounds 2, 3, 5 and 6 exhibited cytotoxicity to HL60 and 2 and 3 to HeLa cells. Furthermore, 2 and 3 showed robust growth-restoring activity of a Saccharomyces cerevisiae (cdc2-1 rad9Δ) mutant strain, whereas 5 and 6 exhibited minor growth-restoring activity in this strain. Thus, these compounds may inhibit the growth of HL60 and HeLa cells by blocking the cell cycle, and they may be utilized as new lead compounds that act as inhibitors of survival signal transduction pathways.
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Affiliation(s)
- Yoshihito Shiono
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Yamagata, Japan
| | - Niken Istikhari Muslihah
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Yamagata, Japan.,Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Takuma Suzuki
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Yamagata, Japan
| | - Nanang Rudianto Ariefta
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Yamagata, Japan.,The United Graduate School of Agricultural Sciences, Iwate University, Iwate, Japan
| | - Chairil Anwar
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Handojo Hadi Nurjanto
- Department of Silviculture, Faculty of Forestry, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Takako Aboshi
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Yamagata, Japan
| | - Tetsuya Murayama
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Yamagata, Japan
| | - Keitaro Tawaraya
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Yamagata, Japan
| | - Takuya Koseki
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Yamagata, Japan
| | - Jun Yoshida
- Center for Liberal Arts and Sciences, Iwate Medical University, Iwate, Japan
| | | | - Shota Uesugi
- The United Graduate School of Agricultural Sciences, Iwate University, Iwate, Japan
| | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University, Iwate, Japan
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27
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Tchoukoua A, Tabopda TK, Usukhbayar N, Kimura KI, Kwon E, Momma H, Koseki T, Shiono Y, Ngadjui BT. New triterpene saponins from the roots of Acacia macrostachya (Mimosaceae). Biosci Biotechnol Biochem 2017; 81:2261-2267. [PMID: 29052455 DOI: 10.1080/09168451.2017.1390393] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Four new oleanane-type saponins, macrostachyaosides A, B, C, and D (1-4) were isolated from the roots of Acacia macrostachya. Their structures were elucidated on the basis of extensive 1D- and 2D-NMR data and HR-ESI-MS analyses. At concentrations of 100 μM of each compounds, none of the tested compounds caused a significant growth reduction against HL60 cells.
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Affiliation(s)
- Abdou Tchoukoua
- a Department of Organic Chemistry , University of Yaounde 1 , Yaounde , Cameroon.,b Faculty of Agriculture , Yamagata University , Tsuruoka , Japan
| | | | - Narandulam Usukhbayar
- c The United Graduate School of Agricultural Sciences , Iwate University , Morioka , Japan
| | - Ken-Ichi Kimura
- c The United Graduate School of Agricultural Sciences , Iwate University , Morioka , Japan
| | - Eunsang Kwon
- d Research and Analytical Center for Giant Molecules, Graduate School of Science , Tohoku University , Sendai , Japan
| | - Hiroyuki Momma
- d Research and Analytical Center for Giant Molecules, Graduate School of Science , Tohoku University , Sendai , Japan
| | - Takuya Koseki
- b Faculty of Agriculture , Yamagata University , Tsuruoka , Japan
| | - Yoshihito Shiono
- b Faculty of Agriculture , Yamagata University , Tsuruoka , Japan
| | - Bonaventure Tchaleu Ngadjui
- a Department of Organic Chemistry , University of Yaounde 1 , Yaounde , Cameroon.,e Department of Medicine and Traditional Pharmacopoeia, Faculty of Medicine and Biomedical Sciences , University of Yaounde 1 , Yaounde , Cameroon
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28
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Tchoukoua A, Kuiate Tabopda T, Konga Simo I, Uesugi S, Ohno M, Kimura KI, Kwon E, Momma H, Shiono Y, Ngadjui BT. Albidosides H and I, two new triterpene saponins from the barks of Acacia albida Del. (Mimosaceae). Nat Prod Res 2017; 32:924-932. [PMID: 28868920 DOI: 10.1080/14786419.2017.1371156] [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: 10/18/2022]
Abstract
Two new triterpene saponins, albidosides H (1) and I (2), along with the three known saponins were isolated from the barks of Acacia albida. Their structures were elucidated on the basis of extensive 1D- and 2D-NMR studies and mass spectrometry. Albidosides H (1) and I (2) were assayed for their cytotoxicity against HeLa and HL60 cells using MTT method.
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Affiliation(s)
- Abdou Tchoukoua
- a Department of Organic Chemistry , University of Yaounde 1 , Yaounde , Cameroon.,b Faculty of Agriculture , Yamagata University , Tsuruoka , Japan
| | | | - Ingrid Konga Simo
- c Department of Chemistry , University of Dschang , Dschang , Cameroon
| | - Shota Uesugi
- d Laboratory of Chemical Biology , The United Graduate School of Agricultural Sciences, Iwate University , Morioka , Japan
| | - Misa Ohno
- d Laboratory of Chemical Biology , The United Graduate School of Agricultural Sciences, Iwate University , Morioka , Japan
| | - Ken-Ichi Kimura
- d Laboratory of Chemical Biology , The United Graduate School of Agricultural Sciences, Iwate University , Morioka , Japan.,e Graduate School of Agriculture , Iwate University , Morioka , Japan
| | - Eunsang Kwon
- f Research and Analytical Center for Giant Molecules, Graduate School of Science , Tohoku University , Sendai , Japan
| | - Hiroyuki Momma
- f Research and Analytical Center for Giant Molecules, Graduate School of Science , Tohoku University , Sendai , Japan
| | - Yoshihito Shiono
- b Faculty of Agriculture , Yamagata University , Tsuruoka , Japan
| | - Bonaventure Tchaleu Ngadjui
- a Department of Organic Chemistry , University of Yaounde 1 , Yaounde , Cameroon.,g Faculty of Medicine and Biomedical Sciences, Department of Medicine and Traditional Pharmacopoeia , University of Yaounde 1 , Yaounde , Cameroon
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29
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Kusakabe K, Honmura Y, Uesugi S, Tonouchi A, Maeda H, Kimura KI, Koshino H, Hashimoto M. Neomacrophorin X, a [4.4.3]Propellane-Type Meroterpenoid from Trichoderma sp. 1212-03. J Nat Prod 2017; 80:1484-1492. [PMID: 28445065 DOI: 10.1021/acs.jnatprod.6b01177] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Neomacrophorin X (1) was isolated from Trichoderma sp. 1212-03. Heteronuclear multiple bond correlation (HMBC) spectral analysis indicated a unique [4.4.3]propellane framework, which was verified by the 1H and 13C chemical shift calculations based on density functional theory (DFT) and subsequent comparison with experimental data obtained in CDCl3. The DFT-based electronic circular dichroism (ECD) calculations were effective in not only determining the absolute configuration but also confirming the relative structure. The predominant conformation of 1 was found to be solvent-dependent, with different conformations presenting different NMR and ECD profiles. Introduction of J-based analysis with a J-resolved HMBC aided in this investigation. This conformational alternation was reproduced by considering the solvation with the SM5.4 model in the calculation, although it was not sufficiently quantitative. Although the calculations without solvent effects suggested a conformer that satisfies the spectral profiles in CDCl3, postcalculations with the SM5.4 solvation protocol stabilized the second major conformer, which reproduces the NMR and ECD profiles in polar solvents. Neomacrophorin X (1) is assumed to be biosynthesized by a coupling between the reduced form of anthraquinone and a neomacrophorin derivative. This hypothesis was supported experimentally by the isolation of pachybasin and chrysophanol, as well as acyclic premacrophorin (2), from the same fungus. Some biological properties of 1 are described.
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Affiliation(s)
- Kazuaki Kusakabe
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki, 036-8561, Japan
| | - Yuna Honmura
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki, 036-8561, Japan
| | - Shota Uesugi
- The United Graduate School of Agricultural Sciences, Iwate University , Morioka, 020-8550, Japan
| | - Akio Tonouchi
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki, 036-8561, Japan
| | - Hayato Maeda
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki, 036-8561, Japan
| | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University , Morioka, 020-8550, Japan
| | - Hiroyuki Koshino
- RIKEN Center for Sustainable Resource Science , Wako, 351-0198, Japan
| | - Masaru Hashimoto
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki, 036-8561, Japan
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30
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Tanaka S, Honmura Y, Uesugi S, Fukushi E, Tanaka K, Maeda H, Kimura KI, Nehira T, Hashimoto M. Cyclohelminthol X, a Hexa-Substituted Spirocyclopropane from Helminthosporium velutinum yone96: Structural Elucidation, Electronic Circular Dichroism Analysis, and Biological Properties. J Org Chem 2017; 82:5574-5582. [PMID: 28467078 DOI: 10.1021/acs.joc.7b00393] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Helminthosporium velutinum yone96 produces cyclohelminthol X (1), a unique hexa-substituted spirocyclopropane. Although its molecular formula and NMR spectral data resemble those of AD0157, being isolated from marine fungus Paraconiothyrium sp. HL-78-gCHSP3-B005, our detailed analyses disclosed a totally different structure. Chemical shift calculations and electronic circular dichroism spectral calculations were quite helpful to establish the structure, when those were performed based on density functional theory. The carbon framework of cyclohelminthols I-IV is found at the C1-C8 propenylcyclopentene substructure of 1. Thus, 1 is assumed to be biosynthesized by cyclopropanation between an oxidized form of cyclohelminthol IV and a succinic anhydride derivative 4. Cytotoxicity for two cancer cell lines and proteasome inhibition efficiency are measured.
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Affiliation(s)
- Shizuya Tanaka
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki 036-8561, Japan
| | - Yuna Honmura
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki 036-8561, Japan
| | - Shota Uesugi
- The United Graduate School of Agricultural Sciences, Iwate University , Morioka 020-8550, Japan
| | - Eri Fukushi
- Graduate School of Agriculture, Hokkaido University , Sapporo 060-8589, Japan
| | - Kazuaki Tanaka
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki 036-8561, Japan
| | - Hayato Maeda
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki 036-8561, Japan
| | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University , Morioka 020-8550, Japan
| | - Tatsuo Nehira
- Graduate School of Integrated Arts and Sciences, Hiroshima University , 1-7-1, Kagamiyama, Higashi-Hiroshima 739-8521, Japan
| | - Masaru Hashimoto
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki 036-8561, Japan
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31
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Kinno M, Kimura KI, Nishida H, Fujikura Y, Katayose N, Tanosaki T, Ichitsubo K, Takimoto M, Tomotake H, Yoshino R, Mori T, Hayashi K, Uematsu M, Ogata T, Nakata M, Sato M, Saito M, Sato M, Hasegawa A. Development of Low-Activation Reinforced Concrete Design Methodology — I: Manufacture of Low-Activation Concrete. NUCL TECHNOL 2017. [DOI: 10.13182/nt09-a9244] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Masaharu Kinno
- Fujita Corporation Ono 2025-1, Atsugi, Kanagawa 243-0125, Japan
| | - Ken-Ichi Kimura
- Fujita Corporation Ono 2025-1, Atsugi, Kanagawa 243-0125, Japan
| | | | - Yusuke Fujikura
- Fujita Corporation Ono 2025-1, Atsugi, Kanagawa 243-0125, Japan
| | | | - Takao Tanosaki
- Taiheiyo Cement Corporation Taisaku 2-4-2, Sakura, Chiba 285-8655, Japan
| | - Koki Ichitsubo
- Taiheiyo Cement Corporation Taisaku 2-4-2, Sakura, Chiba 285-8655, Japan
| | - Masaki Takimoto
- Taiheiyo Cement Corporation Taisaku 2-4-2, Sakura, Chiba 285-8655, Japan
| | - Hiroichi Tomotake
- Taiheiyo Cement Corporation Taisaku 2-4-2, Sakura, Chiba 285-8655, Japan
| | - Ryoetsu Yoshino
- Denki Kagaku Kogyo Kabushiki Kaisha, Omi 2209, Itoigawa, Niigata 949-0393, Japan
| | - Taiichiro Mori
- Denki Kagaku Kogyo Kabushiki Kaisha, Omi 2209, Itoigawa, Niigata 949-0393, Japan
| | - Katsumi Hayashi
- Hitachi-GE Nuclear Energy Saiwai 3-1-1, Hitachi 317-0073, Japan
| | - Mikio Uematsu
- Toshiba Corporation Shinsugita 8, Isogo, Yokohama 235-8523, Japan
| | - Tomohiro Ogata
- Mitsubishi Heavy Industries Wadasaki 1-1-1, Hyogo, Kobe 652-8585, Japan
| | - Mikihiro Nakata
- Mitsubishi Heavy Industries Wadasaki 1-1-1, Hyogo, Kobe 652-8585, Japan
| | - Mitsuru Sato
- Nippon Steel Techno Research Corporation Sakato 3-2-1, Takatsu, Kawasaki 213-0012, Japan
| | - Minoru Saito
- Tohoku Electric Corporation, Inc. Honcho 1-7-1, Aoba, Sendai 980-8550, Japan
| | - Mamabu Sato
- Tohoku University Aramaki, Aoba, Sendai 980-8579, Japan
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32
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Tchoukoua A, Tabopda TK, Uesugi S, Ohno M, Kimura KI, Kwon E, Momma H, Horo I, Çalişkan ÖA, Shiono Y, Ngadjui BT. Triterpene saponins from the roots of Acacia albida Del. (Mimosaceae). Phytochemistry 2017; 136:31-38. [PMID: 28043655 DOI: 10.1016/j.phytochem.2016.12.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 09/13/2016] [Revised: 12/21/2016] [Accepted: 12/22/2016] [Indexed: 06/06/2023]
Abstract
Seven previously undescribed bidesmosidic triterpenoid saponins named albidosides A - G, were isolated from a methanol extract of the roots of Acacia albida. Their structures were elucidated using 1D and 2D NMR spectroscopy and mass spectrometry and determined to be bidesmosides of oleanolic acid and of 16α-hydroxyoleanolic acid. Albidosides B - G were assayed for their cytotoxicity against HeLa and HL60 cells using MTT method and microscopic observation.
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Affiliation(s)
- Abdou Tchoukoua
- Department of Organic Chemistry, University of Yaounde 1, P.O. Box 812, Yaounde, Cameroon; Faculty of Agriculture, Yamagata University, 1-23, Wakaba-machi, Tsuruoka, Yamagata, 997-8555, Japan
| | - Turibio Kuiate Tabopda
- Department of Organic Chemistry, University of Yaounde 1, P.O. Box 812, Yaounde, Cameroon.
| | - Shota Uesugi
- Laboratory of Chemical Biology, The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Misa Ohno
- Laboratory of Chemical Biology, The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Ken-Ichi Kimura
- Laboratory of Chemical Biology, The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Graduate School of Agriculture, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - Hiroyuki Momma
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - Ibrahim Horo
- Department of Chemistry, Faculty of Science, Ege University, 35100, Bornova, İzmir, Turkey
| | - Özgen Alankuş Çalişkan
- Department of Chemistry, Faculty of Science, Ege University, 35100, Bornova, İzmir, Turkey
| | - Yoshihito Shiono
- Faculty of Agriculture, Yamagata University, 1-23, Wakaba-machi, Tsuruoka, Yamagata, 997-8555, Japan.
| | - Bonaventure Tchaleu Ngadjui
- Department of Organic Chemistry, University of Yaounde 1, P.O. Box 812, Yaounde, Cameroon; Department of Medicine and Traditional Pharmacopoeia, Faculty of Medicine and Biomedical Sciences, University of Yaounde 1, P.O. Box 1364, Yaoundé, Cameroon.
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Fotso GW, Kamga J, Ngameni B, Uesugi S, Ohno M, Kimura KI, Momma H, Kwon E, Furuno H, Shiono Y, Ingrid SK, Yeboah SO, Ngadjui BT. Secondary metabolites with antiproliferative effects from Albizia glaberrima var glabrescens Oliv. (Mimosoideae). Nat Prod Res 2017; 31:1981-1987. [DOI: 10.1080/14786419.2016.1269097] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Ghislain Wabo Fotso
- Faculty of Science, Department of Organic Chemistry, University of Yaoundé I, Yaoundé, Cameroon
| | - Justin Kamga
- Faculty of Science, Department of Organic Chemistry, University of Yaoundé I, Yaoundé, Cameroon
| | - Bathelemy Ngameni
- Faculty of Medicine and Biomedical Science, Department of Pharmacognosy and Pharmaceutical Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - Shota Uesugi
- Laboratory of chemical Biology, The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Japan
| | - Misa Ohno
- Laboratory of chemical Biology, The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Japan
| | - Ken-Ichi Kimura
- Laboratory of chemical Biology, The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Japan
| | - Hiroyuki Momma
- Research and Analytical Center for giant Molecules, Graduate School of Science, Tohoku University, Sendai, Japan
| | - Eunsang Kwon
- Research and Analytical Center for giant Molecules, Graduate School of Science, Tohoku University, Sendai, Japan
| | - Hiroshi Furuno
- Green Asia Education Center, Kyushu University, Fukuoka, Japan
| | - Yoshihito Shiono
- Faculty of Agriculture, Department of Food, Life, and Environmental Science, Yamagata University, Tsuruoka, Japan
| | - Simo K. Ingrid
- Faculty of Science, Department of Chemistry, University of Dschang, Dschang, Cameroon
| | - Samuel O. Yeboah
- Faculty of Science, Department of Chemistry, University of Botswana, Gaborone, Botswana
| | - Bonaventure T. Ngadjui
- Faculty of Science, Department of Organic Chemistry, University of Yaoundé I, Yaoundé, Cameroon
- Faculty of Medicine and Biomedical Science, Department of Pharmacognosy and Pharmaceutical Sciences, University of Yaoundé I, Yaoundé, Cameroon
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Minami R, Sato C, Yamahama Y, Kubo H, Hariyama T, Kimura KI. An RNAi Screen for Genes Involved in Nanoscale Protrusion Formation on Corneal Lens in Drosophila melanogaster. Zoolog Sci 2016; 33:583-591. [PMID: 27927092 DOI: 10.2108/zs160105] [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: 11/17/2022]
Abstract
The "moth-eye" structure, which is observed on the surface of corneal lens in several insects, supports anti-reflective and self-cleaning functions due to nanoscale protrusions known as corneal nipples. Although the morphology and function of the "moth-eye" structure, are relatively well studied, the mechanism of protrusion formation from cell-secreted substances is unknown. In Drosophila melanogaster, a compound eye consists of approximately 800 facets, the surface of which is formed by the corneal lens with nanoscale protrusions. In the present study, we sought to identify genes involved in "moth-eye" structure, formation in order to elucidate the developmental mechanism of the protrusions in Drosophila. We re-examined the aberrant patterns in classical glossy-eye mutants by scanning electron microscope and classified the aberrant patterns into groups. Next, we screened genes encoding putative structural cuticular proteins and genes involved in cuticular formation using eye specific RNAi silencing methods combined with the Gal4/UAS expression system. We identified 12 of 100 candidate genes, such as cuticular proteins family genes (Cuticular protein 23B and Cuticular protein 49Ah), cuticle secretion-related genes (Syntaxin 1A and Sec61 ββ subunit), ecdysone signaling and biosynthesis-related genes (Ecdysone receptor, Blimp-1, and shroud), and genes involved in cell polarity/cell architecture (Actin 5C, shotgun, armadillo, discs large1, and coracle). Although some of the genes we identified may affect corneal protrusion formation indirectly through general patterning defects in eye formation, these initial findings have encouraged us to more systematically explore the precise mechanisms underlying the formation of nanoscale protrusions in Drosophila.
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Affiliation(s)
- Ryunosuke Minami
- 1 Laboratory of Biology, Hokkaido University of Education, Sapporo Campus, Sapporo 002-8502, Japan
| | - Chiaki Sato
- 1 Laboratory of Biology, Hokkaido University of Education, Sapporo Campus, Sapporo 002-8502, Japan
| | - Yumi Yamahama
- 2 Department of Biology, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
| | - Hideo Kubo
- 3 Department of Mathematics, Hokkaido University, Sapporo 060-0810, Japan
| | - Takahiko Hariyama
- 2 Department of Biology, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
| | - Ken-Ichi Kimura
- 1 Laboratory of Biology, Hokkaido University of Education, Sapporo Campus, Sapporo 002-8502, Japan
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Tchoukoua A, Kuiate Tabopda T, Uesugi S, Kimura KI, Kwon E, Momma H, Ngadjui BT, Koseki T, Shiono Y. Two new 5-deoxyflavan-3,4-diol glucosides from roots of Albizia chevalieri. Magn Reson Chem 2016; 54:893-896. [PMID: 27546306 DOI: 10.1002/mrc.4504] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 08/13/2016] [Accepted: 08/17/2016] [Indexed: 06/06/2023]
Abstract
Phytochemical investigation of the roots of Albizia chevalieri led to the isolation of two new 5-deoxyflavan-3,4-diol glucosides from roots of A. chevalieri, Chevalieriflavanosides A and B. Their structures were established by 2D NMR techniques, UV, IR, CD, and mass spectrometry. Cytotoxicity of the two compounds was evaluated against acute promyelocytic leukemia HL60 cells. The antibacterial activities of 1 and 2 also were evaluated against Pseudomonas aeruginosa and Staphylococcus aureus using the agar diffusion test. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Abdou Tchoukoua
- Département de Chimie Organique, Université de Yaoundé 1, Yaoundé, Cameroun
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata, Japan
| | | | - Shota Uesugi
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate, Japan
| | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate, Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Sendai, Miyagi, Japan
| | - Hiroyuki Momma
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Sendai, Miyagi, Japan
| | | | - Takuya Koseki
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata, Japan
| | - Yoshihito Shiono
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata, Japan.
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Koganezawa M, Kimura KI, Yamamoto D. The Neural Circuitry that Functions as a Switch for Courtship versus Aggression in Drosophila Males. Curr Biol 2016; 26:1395-403. [PMID: 27185554 DOI: 10.1016/j.cub.2016.04.017] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 03/17/2016] [Accepted: 04/06/2016] [Indexed: 12/15/2022]
Abstract
Courtship and aggression are induced in a mutually exclusive manner in male Drosophila melanogaster, which quickly chooses one of these behavioral repertoires to run depending on whether the encountered conspecific is a female or male, yet the neural mechanism underlying this decision making remains obscure. By targeted excitation and synaptic blockage in a subset of brain neurons, we demonstrate here that the fruitless (fru)-negative subfraction (∼20 cells) of a doublesex-positive neural cluster, pC1, acts as the aggression-triggering center whereas the fru-positive subfraction (∼20 cells) of pC1 acts as the courtship-triggering center, and that the mutually exclusive activation of these two centers is attained by a double-layered inhibitory switch composed of two fru single-positive clusters, LC1 and mAL. To our knowledge, this is the first report to unravel the cellular identity of the neural switch that governs the alternative activation of aggression and courtship in the animal kingdom.
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Affiliation(s)
- Masayuki Koganezawa
- Tohoku University Graduate School of Life Sciences, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
| | - Ken-Ichi Kimura
- Hokkaido University of Education, Sapporo Campus, Sapporo 002-8502, Japan
| | - Daisuke Yamamoto
- Tohoku University Graduate School of Life Sciences, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan.
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Shiono Y, Shibuya F, Koseki T, Supratman U, Uesugi S, Kimura KI. A new α-pyrone metabolite from a mangrove plant endophytic fungus, Fusarium sp. J Asian Nat Prod Res 2014; 17:403-408. [PMID: 25355135 DOI: 10.1080/10286020.2014.961919] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [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: 05/30/2014] [Accepted: 08/31/2014] [Indexed: 06/04/2023]
Abstract
A new α-pyrone derivative, compound 2, and a known one, cladobotrin V, were isolated from the culture broth of the mangrove endophyte Fusarium sp. IM-37. Their structures were determined spectroscopically and compared with previously reported spectral data. Compound 2 restored the growth inhibition caused by hyperactivated Ca(2+)-signaling in mutant yeast.
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Affiliation(s)
- Yoshihito Shiono
- a Department of Bioresource Engineering , Faculty of Agriculture, Yamagata University , Tsuruoka , Yamagata 997-8555 , Japan
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Imamura Y, Yukawa M, Ueno M, Kimura KI, Tsuchiya E. 3,6-Epidioxy-1,10-bisaboladiene inhibits G1 -specific transcription through Swi4/Swi6 and Mbp1/Swi6 via the Hog1 stress pathway in yeast. FEBS J 2014; 281:4612-21. [PMID: 25112483 DOI: 10.1111/febs.12965] [Citation(s) in RCA: 8] [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: 04/22/2014] [Revised: 07/17/2014] [Accepted: 08/06/2014] [Indexed: 11/30/2022]
Abstract
UNLABELLED 3,6-Epidioxy-1,10-bisaboladiene (EDBD), a bisabolane sesquiterpene endoperoxide compound, was previously isolated from Cacalia delphiniifolia and C. hastata in northern Japan. EDBD has cytotoxic effects and induces apoptosis via phosphorylation of p38 mitogen-activated protein kinase in human promyelocytic leukemia HL60 cells. However, the mechanism of action of EDBD has not yet been fully elucidated. In this study, we examined the molecular mechanisms of EDBD in the budding yeast Saccharomyces cerevisiae. EDBD arrested the growth of S. cerevisiae cells by suppressing progression from the G1 phase to the S phase and from the G2 phase to the M phase. Moreover, biochemical and genetic analyses revealed that EDBD activated environmental stress-response pathways involving Hog1 and affected Cln3/G1 cyclin activity, thereby inhibiting the expression of SCB-binding factor and MCB-binding factor target genes. Our results provided important insights into the functions of EDBD in tumor cells and may facilitate the development of EDBD-based antitumor therapies. STRUCTURED DIGITAL ABSTRACT •Swi4 physically interacts with Swi6 by anti tag coimmunoprecipitation (View interaction).
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Affiliation(s)
- Yuko Imamura
- Department of Molecular Biotechnology, Hiroshima University, Japan; Department of Biochemistry, University of Occupational and Environmental Health, Kitakyushu City, Japan
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Yamada H, Oshiro E, Kikuchi S, Hakozaki M, Takahashi H, Kimura KI. Hydroxyeicosapentaenoic acids from the Pacific krill show high ligand activities for PPARs. J Lipid Res 2014; 55:895-904. [PMID: 24668940 DOI: 10.1194/jlr.m047514] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [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: 12/18/2022] Open
Abstract
PPARs regulate the expression of genes for energy metabolism in a ligand-dependent manner. PPARs can influence fatty acid oxidation, the level of circulating triglycerides, glucose uptake and insulin sensitivity. Here, we demonstrate that 5-hydroxyeicosapentaenoic acid (HEPE), 8-HEPE, 9-HEPE, 12-HEPE and 18-HEPE (hydroxylation products of EPA) obtained from methanol extracts of Pacific krill (Euphausia pacifica) can act as PPAR ligands. Two of these products, 8-HEPE and 9-HEPE, enhanced the transcription levels of GAL4-PPARs to a significantly greater extent than 5-HEPE, 12-HEPE, 18-HEPE, EPA, and EPA ethyl-ester. 8-HEPE also activated significantly higher transcription of GAL4-PPARα, GAL4-PPARγ, and GAL4-PPARδ than EPA at concentrations greater than 4, 64, and 64 μM, respectively. We also demonstrated that 8-HEPE increased the expression levels of genes regulated by PPARs in FaO, 3T3-F442A, and C2C12 cells. Furthermore, 8-HEPE enhanced adipogenesis and glucose uptake. By contrast, at the same concentrations, EPA showed weak or little effect, indicating that 8-HEPE was the more potent inducer of physiological effects.
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Affiliation(s)
- Hidetoshi Yamada
- Iwate Biotechnology Research Center, Kitakami, Iwate 024-0003, Japan
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Yoshida J, Seino H, Ito Y, Nakano T, Satoh T, Ogane Y, Suwa S, Koshino H, Kimura KI. Inhibition of glycogen synthase kinase-3β by falcarindiol isolated from Japanese Parsley (Oenanthe javanica). J Agric Food Chem 2013; 61:7515-7521. [PMID: 23895038 DOI: 10.1021/jf401042m] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A new biological activity of falcarindiol isolated from Japanese parsley (Oenanthe javanica) using the mutant yeast YNS17 strain (zds1Δ erg3Δ pdr1Δ pdr3Δ) was discovered as an inhibitor of glycogen synthase kinase-3β (GSK-3β). Falcarindiol inhibited GSK-3β in an ATP noncompetitive manner with a Ki value of 86.9 μM using a human enzyme and luminescent kinase assay platform. Falcarindiol also both suppressed gene expression of glucose-6-phosphatase (G6Pase) in rat hepatoma H4IIE cells and protected mouse neuroblastoma HT22 cells from glutamate-induced oxidative cell death at 10 μM. During an oral glucose tolerance test (OGTT), the blood glucose level was significantly decreased in the rats treated with oral administration of O. javanica extract containing falcarindiol (15 mg/kg). These findings indicate that Japanese parsley could be a useful food ingredient against type-2 diabetes and Alzheimer's disease.
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Affiliation(s)
- Jun Yoshida
- Chemical Biology Laboratory, The United Graduate School of Agricultural Sciences, §Graduate School of Agriculture, and ∥Faculty of Agriculture, Iwate University , Morioka, Iwate 020-8550, Japan
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41
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Forrest RA, Swift LP, Rephaeli A, Nudelman A, Kimura KI, Phillips DR, Cutts SM. Activation of DNA damage response pathways as a consequence of anthracycline-DNA adduct formation. Biochem Pharmacol 2012; 83:1602-12. [PMID: 22414726 DOI: 10.1016/j.bcp.2012.02.026] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Revised: 02/08/2012] [Accepted: 02/27/2012] [Indexed: 11/20/2022]
Abstract
The cytotoxicity of doxorubicin, a clinically used anti-neoplastic drug, can be enhanced by formaldehyde (either endogenous or exogenous) to promote the formation of doxorubicin-DNA adducts. Formaldehyde supplies the carbon required for the covalent linkage of doxorubicin to one strand of DNA, with hydrogen bonds stabilising the doxorubicin mono-adduct to the other strand of DNA, to act much like an interstrand crosslink. Interstrand crosslinks present a major challenge for cellular repair processes, requiring the activation of numerous DNA damage response proteins for resolution of the resulting DNA intermediates and damage. This work investigates DNA damage response proteins activated by doxorubicin-DNA adducts. Although p53 was phosphorylated at Serine 15 in response to adducts, long term growth inhibition of mammalian cells was not affected by p53 status. Using siRNA technology and kinase inhibitors we observed enhanced cellular sensitivity to doxorubicin-DNA adducts when the activity of the signalling protein kinases ATM and ATR were lost. Cells synchronised using a double thymidine block were sensitised to adduct-initiated cell death upon ATR knockdown, but relatively unaffected by ATM knockdown. Loss of ATR was associated with abrogation of a drug-induced G(2)/M block and induction of mitotic catastrophe, while loss of ATM was associated with drug-induced apoptosis in non-synchronised cells. These proteins may therefore be potential drug targets to achieve synergistic cytotoxic responses to doxorubicin-DNA adduct forming therapies. The analysis of these protein kinases with respect to cell cycle progression indicates that ATR is required for G(2)/M checkpoint responses while ATM appears to function in G(1) mediated responses to anthracycline adducts.
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Affiliation(s)
- Robert A Forrest
- La Trobe Institute for Molecular Science, La Trobe University, Victoria 3086, Australia
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Shiono Y, Kikuchi M, Koseki T, Murayama T, Kwon E, Aburai N, Kimura KI. Isopimarane diterpene glycosides, isolated from endophytic fungus Paraconiothyrium sp. MY-42. Phytochemistry 2011; 72:1400-1405. [PMID: 21612804 DOI: 10.1016/j.phytochem.2011.04.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2010] [Revised: 02/18/2011] [Accepted: 04/21/2011] [Indexed: 05/30/2023]
Abstract
Six isopimarane diterpenes, compounds 1-6, were isolated from the endophytic fungus Paraconiothyrium sp. MY-42. Compound 1 possesses a 19-glucopyranosyloxy group. Its structure was first elucidated by spectroscopic data analysis and finally confirmed by X-ray crystallography, whereas structures 2-6 were mainly elucidated based on the analysis of spectroscopic evidence. Compounds 2 and 3 showed moderate cytotoxicities against the human promyelocytic leukemia cell line HL60 (IC₅₀ 6.7 μM value for 2 and 9.8 μM for 3).
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Affiliation(s)
- Yoshihito Shiono
- Department of Bioresource Engineering, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan.
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Abstract
Currently, sex differences in behavior are believed to result from sexually dimorphic neural circuits in the central nervous system (CNS). Drosophila melanogaster is a common model organism for studying the relationship between brain structure, behavior, and genes. Recent studies of sex-specific reproductive behaviors in D. melanogaster have addressed the contribution of sexual differences in the CNS to the control of sex-specific behaviors and the development of sexual dimorphism. For example, sexually dimorphic regions of the CNS are involved in the initiation of male courtship behavior, the generation of the courtship song, and the induction of male-specific muscles in D. melanogaster. In this review, I discuss recent findings about the contribution of cell death to the formation of sexually dimorphic neural circuitry and the regulation of sex-specific cell death by two sex determination factors, Fruitless and Doublesex, in Drosophila.
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Affiliation(s)
- Ken-Ichi Kimura
- Laboratory of Biology, Sapporo Campus, Hokkaido University of Education, Sapporo 002-8502, Japan.
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44
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Ugarenko M, Nudelman A, Rephaeli A, Kimura KI, Phillips DR, Cutts SM. ABT-737 overcomes Bcl-2 mediated resistance to doxorubicin–DNA adducts. Biochem Pharmacol 2010; 79:339-49. [DOI: 10.1016/j.bcp.2009.09.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2009] [Revised: 08/26/2009] [Accepted: 09/01/2009] [Indexed: 10/20/2022]
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Hayashi K, Nemezawa S, Tanaka M, Uematsu M, Ogata T, Nakata M, Yamaguchi K, Kinno M, Kimura KI, Tanosaki T, Yoshino R, Sato M, Saito M, Hasegawa A. Development of Low-Activation Reinforced Concrete Design Methodology — II: Concrete Activation Analyses of BWR/PWR. NUCL TECHNOL 2009. [DOI: 10.13182/nt09-a9245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Katsumi Hayashi
- Hitachi-GE Nuclear Energy, Ltd., Saiwai 3-1-1, Hitachi 317-0073, Japan
| | - Shigeki Nemezawa
- Hitachi-GE Nuclear Energy, Ltd., Saiwai 3-1-1, Hitachi 317-0073, Japan
| | - Motoi Tanaka
- Hitachi-GE Nuclear Energy, Ltd., Saiwai 3-1-1, Hitachi 317-0073, Japan
| | - Mikio Uematsu
- Toshiba Corporation, Shinsugita 8, Isogo Yokohama 235-8523, Japan
| | - Tomohiro Ogata
- Mitsubishi Heavy Industries, Wadasaki 1-1-1, Hyogo, Kobe 652-8585, Japan
| | - Mikihiro Nakata
- Mitsubishi Heavy Industries, Wadasaki 1-1-1, Hyogo, Kobe 652-8585, Japan
| | - Katsuyoshi Yamaguchi
- ITOCHU Techno-Solutions Corporation Kasumigaseki 3-2-5, Chiyoda-Ku, Tokyo 100-6080, Japan
| | - Masaharu Kinno
- Fujita Corporation, Ono 2025-1, Atsugi, Kanagawa 243-0125, Japan
| | - Ken-Ichi Kimura
- Fujita Corporation, Ono 2025-1, Atsugi, Kanagawa 243-0125, Japan
| | - Takao Tanosaki
- Taiheiyo Cement Corporation Taisaku 2-4-2, Sakura, Chiba 285-8655, Japan
| | - Ryoetsu Yoshino
- Denki Kagaku Kogyo Kabushiki Kaisha Omi 2209, Itoigawa, Niigata 949-0393, Japan
| | - Mitsuru Sato
- Nippon Steel Techno Research Corporation Sakato 3-2-1, Takatsu, Kawasaki 213-0012, Japan
| | - Minoru Saito
- Tohoku Electric Power Corporation, Inc. Honcho 1-7-1, Aoba, Sendai 980-8550, Japan
| | - Akira Hasegawa
- Tohoku University, Aramaki, Aoba, Sendai 980-8579, Japan
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Fukuda I, Ito A, Hirai G, Nishimura S, Kawasaki H, Saitoh H, Kimura KI, Sodeoka M, Yoshida M. Ginkgolic acid inhibits protein SUMOylation by blocking formation of the E1-SUMO intermediate. ACTA ACUST UNITED AC 2009; 16:133-40. [PMID: 19246003 DOI: 10.1016/j.chembiol.2009.01.009] [Citation(s) in RCA: 216] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2008] [Revised: 01/10/2009] [Accepted: 01/14/2009] [Indexed: 01/13/2023]
Abstract
Protein modification by small ubiquitin-related modifier proteins (SUMOs) controls diverse cellular functions. Dysregulation of SUMOylation or deSUMOylation processes has been implicated in the development of cancer and neurodegenerative diseases. However, no small-molecule inhibiting protein SUMOylation has been reported so far. Here, we report inhibition of SUMOylation by ginkgolic acid and its analog, anacardic acid. Ginkgolic acid and anacardic acid inhibit protein SUMOylation both in vitro and in vivo without affecting in vivo ubiquitination. Binding assays with a fluorescently labeled probe showed that ginkgolic acid directly binds E1 and inhibits the formation of the E1-SUMO intermediate. These studies will provide not only a useful tool for investigating the roles of SUMO conjugations in a variety of pathways in cells, but also a basis for the development of drugs targeted against diseases involving aberrant SUMOylation.
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Affiliation(s)
- Isao Fukuda
- Chemical Genetics Laboratory, RIKEN Advanced Science Institute, Wako, Saitama 351-0198, Japan
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Saito K, Takahashi Y, Yamaguchi I, Kimura KI, Kanzaki T, Shimada H, Otake H, Oriuchi N, Endo K. [Evaluation of Radio-activated Compounds Produced in the Walls and Adjacent Areas of a Small Medical Cyclotron]. Igaku Butsuri 2009; 29:29-34. [PMID: 21979783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 04/28/2009] [Accepted: 08/06/2009] [Indexed: 05/31/2023]
Abstract
According to the (18)O(p, n) (18)F reaction, fast neutrons produced in the target will cause residual radioactivity in a cyclotron itself and in the concrete walls mainly after thermalization of neutrons.As exploratory work prior to decommissioning of a medical cyclotron facility, surface and core samples of the facility's concrete walls were collected after confirming the external radiation was at a low level based on hollow ionization chamber-type survey meter and glass dosimeter measurements. The residual radioactivity in these samples was measured by gamma-spectrometry. Residual radioactivity was detected in all of the components of the cyclotron. In the concrete, eight residual radioactive nuclides were identified. However, radioactivity concentrations of these radionuclides were less than that of (40)K which may exist generally in a natural environment. A clearance level for radioactive solid waste has not been defined nor implemented at present in Japan, and reliable evaluation will be required to minimize radioactive waste at the time of decommissioning. The present results provide basic data for establishment of regulatory guidelines for decommissioning of medical cyclotrons.
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Affiliation(s)
- Kyoko Saito
- Department of Nuclear Medicine Technology, Gunma Prefectural College of Health Sciences
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Kimura KI, Hachiya T, Koganezawa M, Tazawa T, Yamamoto D. Fruitless and doublesex coordinate to generate male-specific neurons that can initiate courtship. Neuron 2008; 59:759-69. [PMID: 18786359 DOI: 10.1016/j.neuron.2008.06.007] [Citation(s) in RCA: 228] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2007] [Revised: 05/29/2008] [Accepted: 06/02/2008] [Indexed: 11/29/2022]
Abstract
Biologists postulate that sexual dimorphism in the brain underlies gender differences in behavior, yet direct evidence for this has been sparse. We identified a male-specific, fruitless (fru)/doublesex (dsx)-coexpressing neuronal cluster, P1, in Drosophila. The artificial induction of a P1 clone in females effectively provokes male-typical behavior in such females even when the other parts of the brain are not masculinized. P1, located in the dorsal posterior brain near the mushroom body, is composed of 20 interneurons, each of which has a primary transversal neurite with extensive ramifications in the bilateral protocerebrum. P1 is fated to die in females through the action of a feminizing protein, DsxF. A masculinizing protein Fru is required in the male brain for correct positioning of the terminals of P1 neurites. Thus, the coordinated actions of two sex determination genes, dsx and fru, confer the unique ability to initiate male-typical sexual behavior on P1 neurons.
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Affiliation(s)
- Ken-Ichi Kimura
- Laboratory of Biology, Iwamizawa Campus, Hokkaido University of Education, Iwamizawa 068-8642, Japan.
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Spencer DMS, Bilardi RA, Koch TH, Post GC, Nafie JW, Kimura KI, Cutts SM, Phillips DR. DNA repair in response to anthracycline-DNA adducts: a role for both homologous recombination and nucleotide excision repair. Mutat Res 2007; 638:110-21. [PMID: 17961607 DOI: 10.1016/j.mrfmmm.2007.09.005] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2007] [Revised: 09/10/2007] [Accepted: 09/11/2007] [Indexed: 10/22/2022]
Abstract
Doxorubicin, a widely used anthracycline anticancer agent, acts as a topoisomerase II poison but can also form formaldehyde-mediated DNA adducts. This has led to the development of doxorubicin derivatives such as doxoform, which can readily form adducts with DNA. This work aimed to determine which DNA repair pathways are involved in the recognition and possible repair of anthracycline-DNA adducts. Cell lines lacking functional proteins involved in each of the five main repair pathways, mismatch repair (MMR), base excision repair (BER), nucleotide excision repair (NER), homologous recombination (HR) and non-homologous end-joining (NHEJ) were examined for sensitivity to various anthracycline adduct-forming treatments. The treatments used were doxorubicin, barminomycin (a model adduct-forming anthracycline) and doxoform (a doxorubicin-formaldehyde conjugate). Cells with deficiencies in MMR, BER and NHEJ were equally sensitive to adduct-forming treatments compared to wild type cells and therefore these pathways are unlikely to play a role in the repair of these adducts. Some cells with deficiencies in the NER pathway (specifically, those lacking functional XPB, XPD and XPG), displayed tolerance to adducts induced by both barminomycin and doxoform and also exhibited a decreased level of apoptosis in response to adduct-forming treatments. Conversely, two HR deficient cell lines were shown to be more sensitive to barminomycin and doxoform than HR proficient cells, indicating that this pathway is also involved in the repair response to anthracycline-DNA adducts. These results suggest an unusual damage response pathway to anthracycline adducts involving both NER and HR that could be used to optimise cancer therapy for tumours with either high levels of NER or defective HR. Tumours with either of these characteristics would be predicted to respond particularly well to anthracycline-DNA adduct-forming treatments.
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Affiliation(s)
- Damian M S Spencer
- Department of Biochemistry, La Trobe University, Victoria 3086, Australia
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Kimura KI, Ote M, Tazawa T, Yamamoto D. Fruitless specifies sexually dimorphic neural circuitry in the Drosophila brain. Nature 2005; 438:229-33. [PMID: 16281036 DOI: 10.1038/nature04229] [Citation(s) in RCA: 215] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2005] [Accepted: 09/12/2005] [Indexed: 11/09/2022]
Abstract
The Drosophila fruitless (fru) gene product Fru has been postulated to be a neural sex determination factor that directs development of the central nervous system (CNS), thereby producing male-typical courtship behaviour and inducing male-specific muscle. Male-specific Fru protein is expressed in small groups of neurons scattered throughout the CNS of male, but not female, Drosophila. Collectively, these observations suggest that Fru 'masculinizes' certain neurons, thereby establishing neural substrates for male-typical behaviour. However, specific differences between neurons resulting from the presence or absence of Fru are unknown. Previous studies have suggested that Fru might result in sexual differences in the CNS at the functional level, as no overt sexual dimorphism in CNS structure was discernible. Here we identify a subset of fru-expressing interneurons in the brain that show marked sexual dimorphism in their number and projection pattern. We also demonstrate that Fru supports the development of neurons with male-specific dendritic fields, which are programmed to die during female development as a result of the absence of Fru. Thus, Fru expression can produce a male-specific neural circuit, probably used during heterosexual courtship, by preventing cell death in identifiable neurons.
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Affiliation(s)
- Ken-Ichi Kimura
- Laboratory of Biology, Iwamizawa Campus, Hokkaido University of Education, Iwamizawa 068-8642, Japan.
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