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Wada K, Takaguri A, Kaneda K, Mizukami M, Suzuki Y, Yamashita H. Rational design and structure-activity relationship studies reveal new esterified C 20-diterpenoid alkaloid analogues active against MCF-7 human breast cancer cells. J Nat Med 2023; 77:276-283. [PMID: 36477683 DOI: 10.1007/s11418-022-01667-6] [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: 10/18/2022] [Accepted: 11/24/2022] [Indexed: 12/12/2022]
Abstract
Although various diterpenoid alkaloids have been evaluated recently for antiproliferative activity against human tumor cell lines, little information is available regarding the antiproliferative effects of C20-diterpenoid alkaloids against MCF-7 cells. Six new diterpenoid alkaloid derivatives (13, 14, 22, 23, 25, 26) were prepared by C-11 and 15 esterification of kobusine (6). The natural parent alkaloid 6 and all synthesized derivatives (7 - 27, 12a, 15a, 15b, 18a, 18b) were evaluated for antiproliferative activity against MCF-7 cells. The structure-based design strategy resulted in an initial lead derivative, 11,15-dibenzoylkobusine (7; IC50 8.6 µM). Subsequent synthesized 11,15-diacylkobusine derivatives (9, 16, 20, 21, 23, 25, and 26) showed substantially increased suppressive effects against the MCF-7 cell line (IC50 2.3-4.4 µM). In contrast, parent alkaloid 6, two 11-acylkobusine derivatives (15a, 18a), and two 15-acylkobusine derivatives (15b, 18b) showed no effect. 11,15-Diacylation appears to be critical for producing antiproliferative activity in this alkaloid class and could introduce a new avenue in overcoming breast cancer cell proliferation using natural product derivatives. In a preliminary mechanism of action study, representative derivatives (5, 8, 9, and 17) decreased cyclin D1 mRNA expression.
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Affiliation(s)
- Koji Wada
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-Jo 15-Choume, Teine-Ku, Sapporo, 006-8585, Japan.
| | - Akira Takaguri
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-Jo 15-Choume, Teine-Ku, Sapporo, 006-8585, Japan
- Creation Research Institute of Life Science in KITA-No-DAICHI, Hokkaido University of Science, Sapporo, Hokkaido, Japan
| | - Kyosuke Kaneda
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-Jo 15-Choume, Teine-Ku, Sapporo, 006-8585, Japan
- Creation Research Institute of Life Science in KITA-No-DAICHI, Hokkaido University of Science, Sapporo, Hokkaido, Japan
| | - Megumi Mizukami
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-Jo 15-Choume, Teine-Ku, Sapporo, 006-8585, Japan
| | - Yuji Suzuki
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-Jo 15-Choume, Teine-Ku, Sapporo, 006-8585, Japan
| | - Hiroshi Yamashita
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-Jo 15-Choume, Teine-Ku, Sapporo, 006-8585, Japan
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2
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Wada K, Goto M, Tanaka H, Mizukami M, Suzuki Y, Lee KH, Yamashita H. Discovery of C 20-Diterpenoid Alkaloid Kobusine Derivatives Exhibiting Sub-G1 Inducing Activity. ACS Omega 2022; 7:28173-28181. [PMID: 35990488 PMCID: PMC9386823 DOI: 10.1021/acsomega.2c02363] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
Although many diterpenoid alkaloids have been evaluated recently for antiproliferative activity against human cancer cell lines, little data have been offered relating to the antiproliferative effects of hetisine-type C20-diterpenoid alkaloids, such as kobusine (1), likewise as their derivatives. A total of 43 novel diterpenoid alkaloid derivatives (2-10, 2b, 3a, 3b, 6a-16a, 7b, 9b, 10b, 13, 15-26, 15b, 18a, 23a, 27a) were prepared by C-11 and -15 esterification of 1. Antiproliferative effects of the natural parent compound (1) and all synthesized kobusine derivatives against human cancer cell lines, including a triple-negative breast cancer (TNBC) cell line as well as a P-glycoprotein overexpressing multidrug-resistant subline, were assessed. The structure-based design strategy resulted in the lead derivative 11,15-dibenzoylkobusine (3; average IC50 7.3 μM). Several newly synthesized kobusine derivatives (particularly, 5-8, 10, 13, 15-26) exhibited substantial suppressive effects against all tested human cancer cell lines. In contrast, kobusine (1), 11,15-O-diacetylkobusine (2), 11-acylkobusine derivatives (3a, 6a, 9a, 11a, 12a, 15a, 27a), and 15-acylkobusine derivatives (2b, 3b, 7b, 9b, 10b, 15b) showed no effect. The most active kobusine derivatives primarily had two specific substitution patterns, C-11,15 and C-11. Notably, 11,15-diacylkobusine derivatives (3, 6-10, 13, 15, 16, 18, 23) were more potent compared with 11- and 15-acylkobusine derivatives (3a, 3b, 6a-10a, 7b, 9b, 10b, 13a, 15a, 15b, 16a, 18a, 23a). Derivatives 13 and 25 induced MDA-MB-231 cells to the sub-G1 phase within 12 h. 11,15-Diacylation of kobusine (1) appears to be crucial for inducing antiproliferative activity in this alkaloid class and could introduce a new avenue to overcome TNBC using natural product derivatives.
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Affiliation(s)
- Koji Wada
- Department
of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo 006-8585, Japan
| | - Masuo Goto
- Division
of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of
Pharmacy, University of North Carolina, Chapel Hill, North Carolina 27599-7568, United States
| | - Hisano Tanaka
- Department
of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo 006-8585, Japan
| | - Megumi Mizukami
- Department
of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo 006-8585, Japan
| | - Yuji Suzuki
- Department
of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo 006-8585, Japan
| | - Kuo-Hsiung Lee
- Division
of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of
Pharmacy, University of North Carolina, Chapel Hill, North Carolina 27599-7568, United States
| | - Hiroshi Yamashita
- Department
of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo 006-8585, Japan
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Yamashita H, Doi N, Hanawa N, Itoh M, Nakano W, Takahashi E, Mizukami M, Kaneda K, Suzuki Y, Goto M, Lee KH, Wada K. Eleven new C 19-diterpenoid alkaloids from Delphinium elatum cv. Pacific Giant. J Nat Med 2021; 76:161-170. [PMID: 34669108 DOI: 10.1007/s11418-021-01569-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 09/09/2021] [Indexed: 11/30/2022]
Abstract
Diterpenoid alkaloids, the main components of plants of the genera Aconitum, Delphinium, and Garrya, are a group of natural products with notable chemical properties and biological activities. Several C19-diterpenoid alkaloid components from Delphinium elatum cv. Pacific Giant, as well as their derivatives, exhibited cytotoxic activity against lung, prostate, cervical, and vincristine-resistant cervical cancer cell lines. In the current phytochemical investigation on the seeds of D. elatum cv. Pacific Giant, eleven new C19-diterpenoid alkaloids, elapaciline (1), meladine (2), melapacitine (3), iminoeladine (4), 19-oxopaciline (5), 19-oxopacinine (6), N-deethyldelpheline (7), N-deethylpacinine (8), N-deethyl-19-oxoeladine (9), N-deethyl-N-formyleladine (10), and N-deethyl-N-formyldelpheline (11), together with 15 known C19-diterpenoid alkaloids were isolated. Their structures were elucidated by extensive spectroscopic methods including NMR (1D and 2D), IR, and MS (HRMS). Three known diterpenoid alkaloids, 6-dehydrodelcorine (12), delelatine (23), and 6-dehydroeldelidine (24), were isolated for the first time from this plant. Six of the new C19-diterpenoid alkaloids (2, 4-7, and 11) and three of the known diterpenoid alkaloids (18, 23, and 24) were evaluated for cytotoxic activity against five human tumor cell lines.
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Affiliation(s)
- Hiroshi Yamashita
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo, 006-8585, Japan
| | - Nozomi Doi
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo, 006-8585, Japan
| | - Nana Hanawa
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo, 006-8585, Japan
| | - Manami Itoh
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo, 006-8585, Japan
| | - Wataru Nakano
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo, 006-8585, Japan
| | - Eri Takahashi
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo, 006-8585, Japan
| | - Megumi Mizukami
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo, 006-8585, Japan
| | - Kyousuke Kaneda
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo, 006-8585, Japan
| | - Yuji Suzuki
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo, 006-8585, Japan
| | - Masuo Goto
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, 27599-7568, USA
| | - Kuo-Hsiung Lee
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, 27599-7568, USA.,Chinese Medicine Research and Development Center, China Medical University and Hospital, Taizhong, Taiwan
| | - Koji Wada
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo, 006-8585, Japan.
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Yang L, Kirikoshi J, Sato D, Takasugi M, Hishida A, Hayashi S, Kawahara N, Mizukami M, Wu M, Yamagishi T, Arai H. New isoflavone glucosides in yabumame (Amphicarpaea bracteata (L.) Fernald subsp. edgeworthii (Benth.) H.Ohashi var. japonica (Oliv.) H.Ohashi) and their effect on leukotriene B 4 production in mast cells. J Nat Med 2020; 75:28-36. [PMID: 32803653 DOI: 10.1007/s11418-020-01439-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Accepted: 07/05/2020] [Indexed: 11/24/2022]
Abstract
Yabumame (Amphicarpaea bracteata (L.) Fernald subsp. edgeworthii (Benth.) H.Ohashi var. japonica (Oliv.) H.Ohashi) is a legume plant that the Ainu people eat as a traditional food, although the bioactive ingredients other than vitamins have not been studied. In this study, the structures of yabumame isoflavone glucosides were determined and their effect on leukotriene (LT) B4, a chemical mediator of type I allergy, produced in mast cells, was investigated in vitro. Seven compounds were isolated from yabumame. Their structures were determined by spectroscopic and spectrometric analyses, which were genistein-7-O-β-D-glucoside (1), formononetin-7-O-(2″-O-β-D-glucosyl)-β-D-glucoside (2), formononetin-7-O-β-D-glucoside (3), biochanin A-7-O-(2″-O-β-D-glucosyl)-β-D-glucoside (4), formononetin-7-O-(6″-O-malonyl)-β-D-glucoside (5), biochanin A-7-O-(2″-O-β-D-glucosyl-6″-O-β-D-glucosyl)-β-D-glucoside (6), and biochanin A-7-O-(6″-O-malonyl)-β-D-glucoside (7). Compounds 2, 4, and 6 were determined as new compounds. Compound 3 showed statistically significant suppressive effect on LTB4 production in mast cells, although the activity was not strong. On the other hand, biochanin A, an aglycone common to compounds 4, 6, and 7, strongly inhibited the LTB4 production. The results suggest that some of yabumame isoflavone glucosides might contribute to mitigate type I allergy. Seven isoflavone glucosides including 3 new compounds were found in yabumame and their anti-allergic effect was evaluated.
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Affiliation(s)
- Lifeng Yang
- Department of Biotechnology and Environmental Chemistry, Kitami Institute of Technology, 165 Koencho, Kitami, Hokkaido, 090-8507, Japan.,Jinan Fruit Research Institute, All China Federation of Supply and Marketing Cooperatives, 16001 East Road Jingshi, Jinan, 250220, Shandong, China
| | - Jyunichi Kirikoshi
- Department of Biotechnology and Environmental Chemistry, Kitami Institute of Technology, 165 Koencho, Kitami, Hokkaido, 090-8507, Japan
| | - Daiki Sato
- Department of Biotechnology and Environmental Chemistry, Kitami Institute of Technology, 165 Koencho, Kitami, Hokkaido, 090-8507, Japan
| | - Mikako Takasugi
- Department of Life Science, Kyushu Sangyo University, 2-3-1 Matsukadai, Higashi-ku, Fukuoka, 813-8503, Japan
| | - Atsuyuki Hishida
- National Institutes of Biomedical Innovation, Health and Nutrition, 108-4 Ohashi, Nayoro, Hokkaido, 096-0065, Japan
| | - Shigeki Hayashi
- National Institutes of Biomedical Innovation, Health and Nutrition, 108-4 Ohashi, Nayoro, Hokkaido, 096-0065, Japan
| | - Nobuo Kawahara
- National Institutes of Biomedical Innovation, Health and Nutrition, 108-4 Ohashi, Nayoro, Hokkaido, 096-0065, Japan
| | - Megumi Mizukami
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, Maeda 7-15-4-1, Teine, Sapporo, Hokkaido, 006-8585, Japan
| | - Maoyu Wu
- Jinan Fruit Research Institute, All China Federation of Supply and Marketing Cooperatives, 16001 East Road Jingshi, Jinan, 250220, Shandong, China
| | - Takashi Yamagishi
- Department of Biotechnology and Environmental Chemistry, Kitami Institute of Technology, 165 Koencho, Kitami, Hokkaido, 090-8507, Japan
| | - Hirofumi Arai
- Department of Biotechnology and Environmental Chemistry, Kitami Institute of Technology, 165 Koencho, Kitami, Hokkaido, 090-8507, Japan.
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Yamashita H, Miyao M, Hiramori K, Kobayashi D, Suzuki Y, Mizukami M, Goto M, Lee KH, Wada K. Cytotoxic diterpenoid alkaloid from Aconitum japonicum subsp. subcuneatum. J Nat Med 2020; 74:83-89. [PMID: 31346973 PMCID: PMC6952573 DOI: 10.1007/s11418-019-01346-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 04/23/2019] [Accepted: 07/11/2019] [Indexed: 10/26/2022]
Abstract
We explored new cytotoxic C19-diterpenoid alkaloid, lipojesaconitine (1), from rhizoma of Aconitum japonicum THUNB. subsp. subcuneatum (NAKAI) KADOTA. Two additional non-cytotoxic new C19-diterpenoid alkaloids, 10-hydroxychasmanine (2) and 3-hydroxykaracoline (3), together with eight known C19- and C20-diterpenoid alkaloids (4-11) were also isolated. Their structures were elucidated by extensive spectroscopic methods including NMR (1D and 2D), IR, and MS (HRMS). Six known diterpenoid alkaloids, foresticine (5), neolinine (6), aconicarchamine A (7), 9-hydroxynominine (8), kobusine (9), and torokonine (10), were isolated for the first time from A. japonicum subsp. subcuneatum. Alkaloid 1 showed cytotoxicity with IC50 values ranging from 6.0 to 7.3 µM against four human tumor cell lines, except a multidrug-resistant subline, suggesting that 1 was likely exported by P-glycoprotein.
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Affiliation(s)
- Hiroshi Yamashita
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo, 006-8585, Japan
| | - Mai Miyao
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo, 006-8585, Japan
| | - Kazuki Hiramori
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo, 006-8585, Japan
| | - Daisuke Kobayashi
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo, 006-8585, Japan
| | - Yuji Suzuki
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo, 006-8585, Japan
| | - Megumi Mizukami
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo, 006-8585, Japan
| | - Masuo Goto
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, 27599 7568, USA
| | - Kuo-Hsiung Lee
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, 27599 7568, USA
- Chinese Medicine Research and Development Center, China Medical University and Hospital, Taichung, 40402, Taiwan
| | - Koji Wada
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo, 006-8585, Japan.
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Wada K, Goto M, Shimizu T, Kusanagi N, Mizukami M, Suzuki Y, Li KP, Lee KH, Yamashita H. Structure-activity relationships and evaluation of esterified diterpenoid alkaloid derivatives as antiproliferative agents. J Nat Med 2019; 73:789-799. [PMID: 31222559 DOI: 10.1007/s11418-019-01331-6] [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: 04/17/2019] [Accepted: 06/10/2019] [Indexed: 10/26/2022]
Abstract
Diterpenoid alkaloids with remarkable chemical properties and biological activities are frequently found in plants of the genera Aconitum, Delphinium, and Garrya. However, little information has been reported on the antiproliferative effects of the diterpenoid alkaloid constituents of Aconitum and Delphinium plants. C-1 and 14 esterifications of delcosine (1) were carried out to provide 39 new diterpenoid alkaloid derivatives (3-14, 16-29, 3a-7a, 9a, 13a, 13b, 14a, 14b, 16a, 17a, 24a, 35a). Selected compounds (3-14, 16-29, 3a-7a, 9a, 13a, 13b, 14a, 14b, 16a, 17a, 24a, 35a) were evaluated for antiproliferative activity against three to five human tumor cell lines including triple-negative breast cancer (TNBC) and P-glycoprotein (P-gp) overexpressing multidrug-resistant (MDR) subline. Several newly synthesized delcosine derivatives (6, 7, 13, 13a, 13b) showed substantial suppressive effects against all human tumor cell lines tested. In contrast, the natural alkaloids (1, 31, 33) showed no effect. Most of the active compounds were delcosine derivatives with two specific substitution patterns-C-1 and C-1,14. In particular, 1-acyldelcosine derivative (5-7) displayed more potency than 1,14-diacyldelcosine derivatives (5a-7a). These acylated alkaloid derivatives caused accumulation of TNBC cells at sub-G1 within 24 h. 1-Acylation of 1 appears to be critical for producing antiproliferative activity in this alkaloid class and a means to provide promising new leads for further development into antitumor agents.
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Affiliation(s)
- Koji Wada
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo, 006-8585, Japan.
| | - Masuo Goto
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, 27599-7568, USA
| | - Takahiro Shimizu
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo, 006-8585, Japan
| | - Nami Kusanagi
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo, 006-8585, Japan
| | - Megumi Mizukami
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo, 006-8585, Japan
| | - Yuji Suzuki
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo, 006-8585, Japan
| | - Kang-Po Li
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, 27599-7568, USA
| | - Kuo-Hsiung Lee
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, 27599-7568, USA.,Chinese Medicine Research and Development Center, China Medical University and Hospital, Taichung, 40402, Taiwan
| | - Hiroshi Yamashita
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 4-1, Maeda 7-jo 15-choume, Teine-ku, Sapporo, 006-8585, Japan
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7
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Sakata Y, Yasui E, Mizukami M, Nagumo S. Cascade reaction including a formal [5 + 2] cycloaddition by use of alkyne-Co2(CO)6 complex. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.01.045] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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8
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Katsumi D, Nakasone K, Terayama N, Yasui E, Mizukami M, Miyashita M, Nagumo S. Total Synthesis of Sekothrixide Strategically Utilizing Regioselective Coupling of TMS-Protected Epoxy sec-Alcohol with Gilman Reagent. J Org Chem 2019; 84:1553-1562. [PMID: 30608691 DOI: 10.1021/acs.joc.8b03006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new efficient synthesis of sekothrixide was established on the basis of our developed regioselective coupling of epoxy sec-alcohol with Gilman reagent guided by a TMS group. The new synthetic route allowed an overall yield of 6.3% (26 steps) from optically active 3-silyloxy-2-methylaldehyde.
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Affiliation(s)
- Daisuke Katsumi
- Department of Applied Chemistry , Kogakuin University , Nakano 2665-1 , Hachioji , Tokyo 192-0015 , Japan
| | - Kazuki Nakasone
- Department of Applied Chemistry , Kogakuin University , Nakano 2665-1 , Hachioji , Tokyo 192-0015 , Japan
| | - Naoki Terayama
- Department of Applied Chemistry , Kogakuin University , Nakano 2665-1 , Hachioji , Tokyo 192-0015 , Japan
| | - Eiko Yasui
- Department of Applied Chemistry , Kogakuin University , Nakano 2665-1 , Hachioji , Tokyo 192-0015 , Japan.,Department of Chemistry and Life Science , Kogakuin University , Nakano 2665-1 , Hachioji , Tokyo 192-0015 , Japan
| | - Megumi Mizukami
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences , Hokkaido University of Science , Maeda 7-15-4-1 , Teine, Sapporo , Hokkaido 006-8585 , Japan
| | - Masaaki Miyashita
- Department of Applied Chemistry , Kogakuin University , Nakano 2665-1 , Hachioji , Tokyo 192-0015 , Japan
| | - Shinji Nagumo
- Department of Applied Chemistry , Kogakuin University , Nakano 2665-1 , Hachioji , Tokyo 192-0015 , Japan.,Department of Chemistry and Life Science , Kogakuin University , Nakano 2665-1 , Hachioji , Tokyo 192-0015 , Japan
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9
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Sakata Y, Yasui E, Takatori K, Suzuki Y, Mizukami M, Nagumo S. Syntheses of Polycyclic Tetrahydrofurans by Cascade Reactions Consisting of Five-Membered Ring Selective Prins Cyclization and Friedel–Crafts Cyclization. J Org Chem 2018; 83:9103-9118. [DOI: 10.1021/acs.joc.8b01195] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Yuki Sakata
- Department of Applied Chemistry, Kogakuin University, Nakano 2665-1, Hachioji, Tokyo 192-0015, Japan
| | - Eiko Yasui
- Department of Applied Chemistry, Kogakuin University, Nakano 2665-1, Hachioji, Tokyo 192-0015, Japan
| | - Kazuhiko Takatori
- Department of Synthetic Organic Chemistry, Meiji Pharmaceutical University, Noshio 2-522-1, Kiyose, Tokyo 204-8588, Japan
| | - Yuji Suzuki
- Department of Applied Chemistry, Kogakuin University, Nakano 2665-1, Hachioji, Tokyo 192-0015, Japan
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, Maeda 15-4-1, Teine, Sapporo, Hokkaido 006-8585, Japan
| | - Megumi Mizukami
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, Maeda 15-4-1, Teine, Sapporo, Hokkaido 006-8585, Japan
| | - Shinji Nagumo
- Department of Applied Chemistry, Kogakuin University, Nakano 2665-1, Hachioji, Tokyo 192-0015, Japan
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10
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Yamashita H, Katoh M, Kokubun A, Uchimura A, Mikami S, Takeuchi A, Kaneda K, Suzuki Y, Mizukami M, Goto M, Lee KH, Wada K. Four new C 19-diterpenoid alkaloids from Delphinium elatum. Phytochem Lett 2018; 24:6-9. [PMID: 29375725 PMCID: PMC5785106 DOI: 10.1016/j.phytol.2017.12.013] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Diterpenoid alkaloids with remarkable chemical properties and biological activities are frequently found in plants of the genera Aconitum, Delphinium, and Garrya. Accordingly, several C19-diterpenoid alkaloid components from Delphinium elatum cv. Pacific Giant, as well as their derivatives, exhibited cytotoxic activity against lung, prostate, nasopharyngeal, and vincristine-resistant nasopharyngeal cancer cell lines. Four new C19-diterpenoid alkaloids, elapacigine (1), N-deethyl-N-formylpaciline (2), N-deethyl-N-formylpacinine (3), and N-formyl-4,19-secoyunnadelphinine (4), together with 11 known C19-diterpenoid alkaloids were isolated in a phytochemical investigation on the seeds of D. elatum cv. Pacific Giant. Their structures were elucidated by extensive spectroscopic methods including NMR (1D and 2D), IR, and MS (HRMS). Three of the new C19-diterpenoid alkaloids (2-4) and five of the known diterpenoid alkaloids were evaluated for cytotoxic activity against five human tumor cell lines.
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Affiliation(s)
- Hiroshi Yamashita
- Hokkaido Pharmaceutical University, School of Pharmacy, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo 006-8590, Japan
| | - Megumi Katoh
- Hokkaido Pharmaceutical University, School of Pharmacy, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo 006-8590, Japan
| | - Akane Kokubun
- Hokkaido Pharmaceutical University, School of Pharmacy, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo 006-8590, Japan
| | - Ayano Uchimura
- Hokkaido Pharmaceutical University, School of Pharmacy, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo 006-8590, Japan
| | - Sakina Mikami
- Hokkaido Pharmaceutical University, School of Pharmacy, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo 006-8590, Japan
| | - Ayana Takeuchi
- Hokkaido Pharmaceutical University, School of Pharmacy, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo 006-8590, Japan
| | - Kyousuke Kaneda
- Hokkaido Pharmaceutical University, School of Pharmacy, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo 006-8590, Japan
| | - Yuji Suzuki
- Hokkaido Pharmaceutical University, School of Pharmacy, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo 006-8590, Japan
| | - Megumi Mizukami
- Hokkaido Pharmaceutical University, School of Pharmacy, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo 006-8590, Japan
| | - Masuo Goto
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599-7568, USA
| | - Kuo-Hsiung Lee
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599-7568, USA
- Chinese Medicine Research and Development Center, China Medical University and Hospital, Taichung, Taiwan
| | - Koji Wada
- Hokkaido Pharmaceutical University, School of Pharmacy, 4-1, 7-jo 15-choume, Maeda, Teine-ku, Sapporo 006-8590, Japan
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11
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Akimitsu H, Ueda M, Tasaki M, Matsumoto S, Mizukami M, Misumi Y, Masuda T, Yamashita T, Obayashi K, Ando Y. A novel amyloid protein causing systemic venous amyloidosis in the elderly. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Nagumo S, Mizukami M. Cyclization and Ring Transformation via Spirocyclic Arenium Ions. J SYN ORG CHEM JPN 2016. [DOI: 10.5059/yukigoseikyokaishi.74.18] [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: 11/06/2022]
Affiliation(s)
- Shinji Nagumo
- Department of Chemistry and Life Science, School of Advanced Engineering, Kogakuin University
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13
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Sunagawa S, Yamada H, Naito M, Yasui E, Mizukami M, Miyashita M, Nagumo S. Synthetic study of arenicolide C: stereoselective synthesis of the C19–C36 segment. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.10.046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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14
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Affiliation(s)
- Naoki Terayama
- Department
of Applied Chemistry Kogakuin University Nakano 2665-1, Hachioji, Tokyo 192-0015, Japan
| | - Eiko Yasui
- Department
of Applied Chemistry Kogakuin University Nakano 2665-1, Hachioji, Tokyo 192-0015, Japan
| | - Megumi Mizukami
- Hokkaido Pharmaceutical University, School of Pharmacy, Katsuraoka 7-1,
Otaru, Hokkaido 047-0264, Japan
| | - Masaaki Miyashita
- Department
of Applied Chemistry Kogakuin University Nakano 2665-1, Hachioji, Tokyo 192-0015, Japan
| | - Shinji Nagumo
- Department
of Applied Chemistry Kogakuin University Nakano 2665-1, Hachioji, Tokyo 192-0015, Japan
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15
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Mizukami M, Wada K, Sato G, Ishii Y, Kawahara N, Nagumo S. Novel method for construction of tetrahydro-1-benzazepine and tetrahydro-2-benzazepine based on 7-endo selective Friedel–Crafts cyclization of vinyloxirane. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.03.012] [Citation(s) in RCA: 12] [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] [Indexed: 11/29/2022]
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16
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Suzuki Y, Niwa T, Yasui E, Mizukami M, Miyashita M, Nagumo S. Tandem five membered-ring selective Prins reaction and Friedel–Crafts reaction. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2011.12.113] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Nagumo S, Takada H, Yasui E, Sahara Y, Chinen Y, Tanaka H, Morita Y, Kobiki C, Narisawa D, Mizukami M, Miyashita M. Friedel-Crafts Reactions of Vinylaziridine Linked to an Ester Group. HETEROCYCLES 2011. [DOI: 10.3987/com-10-12115] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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Nagumo S, Miyashita M, Takada H, Yasui E, Mizukami M. Synthetic Studies of Lepranthin, a Lichen-Produced Dimeric Macrolide. Stereoselective Synthesis of a Seco-Acid Based on Stereospecific Epoxide-Opening Reactions. HETEROCYCLES 2011. [DOI: 10.3987/com-10-12106] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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19
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Takada H, Nagumo S, Yasui E, Mizukami M, Miyashita M. Synthetic Studies of the Lichen Macrolide Lepranthin. Stereoselective Synthesis of the Diolide Framework Based on Regioselective Epoxide-Opening Reactions. Chem Pharm Bull (Tokyo) 2011; 59:525-7. [DOI: 10.1248/cpb.59.525] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | - Shinji Nagumo
- Department of Applied Chemistry, Kogakuin University
| | - Eiko Yasui
- Department of Applied Chemistry, Kogakuin University
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20
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Nagumo S, Nakano T, Hata K, Mizukami M, Miyashita M. Stereoselective Synthesis of the C25−C36 Segment of Arenicolides A and B: Determination of the Configuration of the Trisubstituted Epoxide. Org Lett 2010; 12:908-11. [DOI: 10.1021/ol902750e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shinji Nagumo
- Department of Applied Chemistry, Kogakuin University, Nakano 2665-1, Hachioji, Tokyo 192-0015, Japan, and Hokkaido Pharmaceutical University, School of Pharmacy, Katsuraoka 7-1, Otaru 047-0264, Japan
| | - Taeko Nakano
- Department of Applied Chemistry, Kogakuin University, Nakano 2665-1, Hachioji, Tokyo 192-0015, Japan, and Hokkaido Pharmaceutical University, School of Pharmacy, Katsuraoka 7-1, Otaru 047-0264, Japan
| | - Kyomi Hata
- Department of Applied Chemistry, Kogakuin University, Nakano 2665-1, Hachioji, Tokyo 192-0015, Japan, and Hokkaido Pharmaceutical University, School of Pharmacy, Katsuraoka 7-1, Otaru 047-0264, Japan
| | - Megumi Mizukami
- Department of Applied Chemistry, Kogakuin University, Nakano 2665-1, Hachioji, Tokyo 192-0015, Japan, and Hokkaido Pharmaceutical University, School of Pharmacy, Katsuraoka 7-1, Otaru 047-0264, Japan
| | - Masaaki Miyashita
- Department of Applied Chemistry, Kogakuin University, Nakano 2665-1, Hachioji, Tokyo 192-0015, Japan, and Hokkaido Pharmaceutical University, School of Pharmacy, Katsuraoka 7-1, Otaru 047-0264, Japan
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Nagumo S, Miura T, Mizukami M, Miyoshi I, Imai M, Kawahara N, Akita H. Intramolecular Friedel–Crafts type reaction of vinyloxiranes linked to an ester group. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.09.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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22
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Nagumo S, Ishii Y, Sato G, Mizukami M, Imai M, Kawahara N, Akita H. 8-Endo selective Friedel–Crafts cyclization of vinyloxiranes with Co2(CO)6-complexed acetylene. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2008.10.043] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Mizukami M, Zhong G, Fukuchi I, Zhang L, Kurihara K. In situpolymerization of molecular macroclusters on silica: poly( N-isopropylacrylamide) nano-films. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308081981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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24
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Nakano S, Mizukami M, Kurihara K. Resonance shear measurement on liquid crystal confined between solid surfaces under electric field. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308082275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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25
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Sugita S, Shimizu N, Watanabe K, Mizukami M, Morio T, Sugamoto Y, Mochizuki M. Use of multiplex PCR and real-time PCR to detect human herpes virus genome in ocular fluids of patients with uveitis. Br J Ophthalmol 2008; 92:928-32. [PMID: 18408082 PMCID: PMC2564807 DOI: 10.1136/bjo.2007.133967] [Citation(s) in RCA: 150] [Impact Index Per Article: 9.4] [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] [Indexed: 11/04/2022]
Abstract
AIM To measure the genomic DNA of human herpes viruses (HHV) in the ocular fluids and to analyse the clinical relevance of HHV in uveitis. METHODS After informed consent was obtained, a total of 111 ocular fluid samples (68 aqueous humour and 43 vitreous fluid samples) were collected from 100 patients with uveitis. The samples were assayed for HHV-DNA (HHV1-8) by using two different polymerase chain reaction (PCR) assays, qualitative PCR (multiplex PCR) and quantitative PCR (real-time PCR). RESULTS In all of the patients with acute retinal necrosis (n = 16) that were tested, either the HSV1 (n = 2), HSV2 (n = 3), or VZV (n = 11) genome was detected. In all patients, high copy numbers of the viral DNA were also noted, indicating the presence of viral replication. In another 10 patients with anterior uveitis with iris atrophy, the VZV genome was detected. When using multiplex PCR, EBV-DNA was detected in 19 of 111 samples (17%). However, real-time PCR analysis of EBV-DNA indicated that there were only six of the 19 samples that had significantly high copy numbers. The cytomegalovirus (CMV) genome was detected in three patients with anterior uveitis of immunocompetent patients and in one immunocompromised CMV retinitis patient. In addition, one patient with severe unilateral panuveitis had a high copy number of HHV6-DNA. There was no HHV7- or HHV8-DNA detected in any of the samples. CONCLUSIONS A qualitative multiplex PCR is useful in the screening of viral infections. However, the clinical relevance of the virus infection needs to be evaluated by quantitative real-time PCR.
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Affiliation(s)
- S Sugita
- Department of Ophthalmology & Visual Science, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
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26
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Nagumo S, Mizukami M, Wada K, Miura T, Bando H, Kawahara N, Hashimoto Y, Miyashita M, Akita H. Novel construction of hydro-2-benzazepines based on 7-endo selective Friedel–Crafts-type reaction of vinyloxiranes. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.09.106] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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27
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Honda K, Mizukami M, Ueda Y, Hamada N, Seike N. Residue level of polycyclic aromatic hydrocarbons in Japanese paddy soils from 1959 to 2002. Chemosphere 2007; 68:1763-71. [PMID: 17490707 DOI: 10.1016/j.chemosphere.2007.03.040] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2006] [Revised: 01/11/2007] [Accepted: 03/26/2007] [Indexed: 05/15/2023]
Abstract
The residue level of 21 polycyclic aromatic hydrocarbons (PAHs) and the temporal changes in this level were investigated in paddy soils collected from particular experimental sites in Japan from 1959 to 2002. The average total PAH concentration in all the samples was 496 microg kg(-1), and it ranged from 52.9 to 2180 microg kg(-1). The residue level of the PAHs was the highest during the 1960s, rapidly decreased during the 1970s, and remained almost constant thereafter. Relatively high PAH concentrations were observed in soils from areas that experienced heavy snowfall and that had relatively low air temperature. The predominant PAHs were phenanthrene, fluoranthene, naphthalene, and pyrene, and their concentration overall and in relation to that of the total PAHs decreased each year since the 1960s. Similarities in the PAH profiles among the locations were determined using the concentration correlation matrix and cluster analysis, and ratios of the levels of specific PAH pairs were also calculated to determine their origin. The collected data suggested that the origins of soil PAHs changed chronologically from the burning of agricultural wastes such as stubble before the mid-1970s to the combustion of fossil fuel and its secondary products after the mid-1970s.
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Affiliation(s)
- K Honda
- Department of Environmental Science for Industry, Ehime University, 3-5-7 Tarumi, Matsuyama, Japan.
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28
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Kurihara K, Mizukami M, Endo S. Hydrogen-bonded structure of alcohols adsorbed on silica surface in cyclohexane. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305082632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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29
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So T, Hanagiri T, Mizukami M, Ichiki Y, Sugaya M, Takenoyama M, Sugio K, Yasumoto K. PD-027 Abnormal HLA expression as an immune escape mechanism inlung cancer cell lines. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)80360-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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30
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Hanagiri T, Sugaya M, Baba T, Fukuyama T, Nagata Y, Mizukami M, So T, Takenoyama M, Sugio K, Yasumoto K. PD-012 Establishment of lung cancer cell lines and identification of tumor antigens recognized by CTL. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)80344-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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31
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Mizukami M, Hanagiri T, Fukuyama T, So T, Ichiki Y, Sugaya M, Yasuda M, Takenoyama M, Sugio K, Yasumoto K. O-022 Identification of antigens in lung cancer by using IgG derived from tumor-infiltrating B lymphocytes. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)80154-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
An on-line sample enrichment system was designed using monolithic precolumns in microcolumn LC. The monolithic ODS capillary columns were prepared via in situ sol-gel processes. The enrichment efficiency of the monolithic columns was tested by using phthalates as the analytes. The relative standard deviations (n = 6) for the retention time, peak area and peak height were between 0.4 and 1.2%, 0.9 and 5.5% and 0.4 and 3.9%, respectively. The system was linear (R2 > 0.99) within the working sample concentration and sample volume ranges. Comparing to 0.2 microl injection with a typical sample injector, the theoretical plate number of a same separation column was increased by 3-6-fold when the precolumn unit was used for sample injection. The recoveries of the analytes were between 88 and 120%, and the sample volume that could be injected into the system was increased up to 5000-fold. The limits of detection were improved by more than 2000-fold and were between 0.21 and 0.87 ng ml(-1) even with a UV absorbance detector. This system was applied to the determination of phthalates contained in laboratory distilled water and tap water samples.
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Affiliation(s)
- Lee Wah Lim
- Department of Chemistry, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
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33
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Nagumo S, Ono M, Kakimoto YI, Furukawa T, Hisano T, Mizukami M, Kawahara N, Akita H. Intramolecular reaction of a phenonium ion. Novel lactonization of 4-aryl-5-tosyloxypentanoates and 4-aryl-5-tosyloxyhexanoates concomitant with a phenyl rearrangement. J Org Chem 2002; 67:6618-22. [PMID: 12227789 DOI: 10.1021/jo010500q] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The novel lactonizations of methyl 4-aryl-5-tosyloxypentanoate 1 and 4-aryl-5-tosyloxyhexanoate 3 concomitant with a phenyl rearrangement are reported. The lactonizations were promoted by silica gel or heating in various solvents. By examining the effects of substituents of the aromatic ring on the reactivity, it was found that the reaction proceeded via a phenonium ion. This finding was supported by the stereochemical results for the lactonization of optical active 1. Silica gel-promoted lactonization of 1 gave only gamma-lactone 2, whereas that of 3 afforded gamma-lactone 4 and delta-lactone 5. These lactonizations proved to be kinetically controlled. On the other hand, when 3c was heated in CH(3)NO(2) at 70 degrees C, the highly selective formation of 4c was observed. Further detailed experiments confirmed that the thermal lactonization in CH(3)NO(2) was thermodynamically controlled.
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Affiliation(s)
- Shinji Nagumo
- Hokkaido College of Pharmacy, Katsuraoka 7-1, Otaru, Hokkaido 047-0264, Japan.
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34
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Aikawa R, Nagai T, Tanaka M, Zou Y, Ishihara T, Takano H, Hasegawa H, Akazawa H, Mizukami M, Nagai R, Komuro I. Reactive oxygen species in mechanical stress-induced cardiac hypertrophy. Biochem Biophys Res Commun 2001; 289:901-7. [PMID: 11735132 DOI: 10.1006/bbrc.2001.6068] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Mechanical stress induces various hypertrophic responses including activation of mitogen-activated protein kinases (MAPKs) in cardiac myocytes. Here we examined the role of the small GTP-binding proteins of Rho family and reactive oxygen species (ROS) in stretch-induced activation of p38MAPK in cardiomyocytes. Overexpression of dominant-negative mutants of Rac1 (D.N. Rac1), D.N.RhoA and D.N.Cdc42 suppressed stretch-induced activation of p38MAPK. Overexpression of constitutively active mutants of Rac1 (C.A.Rac1) and C.A.Cdc42 increased the p38MAPK activity in the absence of mechanical stress. Pretreatment with N-acetyl-L-cysteine and N-(2-mercaptopropionyl)-glycine (NAC) suppressed stretch-induced activation of p38MAPK. Mechanical stretch increased intracellular ROS generation, which was abrogated by overexpression of D.N.Rac1 and attenuated by overexpression of D.N.RhoA and D.N.Cdc42. An increase in protein synthesis evoked by mechanical stretch was suppressed by overexpression of D.N.Rac1 and pretreatment with NAC. These results suggest that mechanical stress induces cardiac hypertrophy through the Rac1-ROS-p38MAPK pathway in cardiac myocytes.
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Affiliation(s)
- R Aikawa
- Department of Cardiovascular Medicine, University of Tokyo Graduate School of Medicine, Tokyo, Japan
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35
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Osaki T, Oyama T, Inoue M, Gu CD, Kodate M, Aikawa M, So T, Mizukami M, Mitsudomi T, Yasumoto K. Molecular biological markers and micrometastasis in resected non-small-cell lung cancer. Prognostic implications. Jpn J Thorac Cardiovasc Surg 2001; 49:545-51. [PMID: 11577444 DOI: 10.1007/bf02913530] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVES Recent advances in molecular biology and genetics have created new diagnostic and treatment possibilities in clinical oncology. We evaluated the usefulness of molecular biological factors in primary tumor and micrometastasis in the bone marrow and pathological negative (pN0) lymph nodes as prognostic parameters in non-small-cell lung cancer (NSCLC) patients. METHODS Pathological specimens were collected from 129 NSCLC patients to analyze molecular biological markers, including K-ras, p53, Rb, p16, loss of heterozygosity (LOH) at 3p, vascular endothelial growth factor (VEGF), and telomerase activity. Bone marrow samples from 250 NSCLC patients and pN0 lymph nodes from 85 of these patients were collected for micrometastasis detection by immunohistochemistry against cytokeratin. RESULTS p53 abnormalities and 3p LOH were significantly associated with reduced patient survival in adenocarcinoma, whereas VEGF expression was significantly associated with reduced survival in a squamous cell carcinoma histological subtype by univariate or multivariate analysis. We identified micrometastatic tumor cells in bone marrow of 78 (31.2%) of 250 patients and in pN0 lymph nodes of 26 (30.6%) of 85 patients. Both bone marrow and lymph nodal micrometastases were associated with decreased survival among patients with stage I, however, only lymph nodal micrometastasis had a significant impact on survival. CONCLUSIONS Molecular biological features of primary tumor and micrometastatic status appear useful in defining groups of patients with a poor prognosis who could benefit from adjuvant systemic treatment.
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Affiliation(s)
- T Osaki
- Department of Surgery II, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu 807-8555, Japan
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Zou Y, Hiroi Y, Uozumi H, Takimoto E, Toko H, Zhu W, Kudoh S, Mizukami M, Shimoyama M, Shibasaki F, Nagai R, Yazaki Y, Komuro I. Calcineurin plays a critical role in the development of pressure overload-induced cardiac hypertrophy. Circulation 2001; 104:97-101. [PMID: 11435345 DOI: 10.1161/01.cir.104.1.97] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Although activation of the Ca(2+)-dependent phosphatase calcineurin has been reported to induce cardiomyocyte hypertrophy, whether calcineurin is involved in pressure overload-induced cardiac hypertrophy remains controversial. METHODS AND RESULTS We examined in the present study the role of calcineurin in pressure overload-induced cardiac hypertrophy using transgenic mice that overexpress the dominant negative mutant of calcineurin specifically in the heart. There were no significant differences in body weight, blood pressure, heart rate, heart weight, and the cardiac calcineurin activity between the transgenic mice and their littermate wild-type mice at basal state. The activity of calcineurin was markedly increased by pressure overload produced by constriction of the abdominal aorta in the heart of wild-type mice but less increased in the heart of the transgenic mice. Pressure overload induced increases in heart weight, wall thickness of the left ventricle, and diameter of cardiomyocytes; reprogramming of expressions of immediate early response genes and fetal-type genes; activation of extracellular signal-regulated protein kinases; and fibrosis. All these hypertrophic responses were more prominent in the wild-type mice than in the transgenic mice. CONCLUSIONS These results suggest that calcineurin plays a critical role in the development of pressure overload-induced cardiac hypertrophy.
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Affiliation(s)
- Y Zou
- Department of Cardiovascular Science and Medicine, Chiba University Graduate School of Medicine, Chiba
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37
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Tokunaga M, Shiraishi Y, Odachi M, Mizukami M, Tokunaga H, Philo JS, Arakawa T, Ishibashi M, Tanaka R, Takagi H. Molecular cloning of groESL locus, and purification and characterization of chaperonins, GroEL and GroES, from Bacillus brevis. Biosci Biotechnol Biochem 2001; 65:1379-87. [PMID: 11471738 DOI: 10.1271/bbb.65.1379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The groESL locus of a protein-hypersecreting bacterium, Bacillus brevis, was cloned by PCR using primers designed based on the DNA sequence of a B. subtilis homolog. GroEL protein was purified to apparent homogeneity and its ATPase activity was characterized: it hydrolyzed ATP, CTP, and TTP in this order of reaction rate, and its specific activity for ATP was 0.1 micromole/min/mg protein. Purified GroEL forms a tetradecamer. GroEL was estimated to contain 22% alpha-helix, 24% beta-sheet, and 19% turn structures, by CD measurement. GroES protein was also highly purified to examine its chaperonin activity. GroEL protected from thermal inactivation of and showed refolding-promoting activity for malate dehydrogenase, strictly depending on the presence of ATP and GroES.
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Affiliation(s)
- M Tokunaga
- Laboratory of Applied and Molecular Microbiology, Faculty of Agriculture, Kagoshima University, Korimoto, Japan.
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38
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Uyeda M, Mizukami M, Yokomizo K, Suzuki K. Pentalenolactone I and hygromycin A, immunosuppressants produced by Streptomyces filipinensis and Streptomyces hygroscopicus. Biosci Biotechnol Biochem 2001; 65:1252-4. [PMID: 11440152 DOI: 10.1271/bbb.65.1252] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Immunosuppressants isolated from Streptomyces filipinensis and S. hygroscopicus were identified with pentalenolactone I and hygromycin A, respectively. The compounds as well as cyclosporin A showed immunosuppressant activity in the mixed lymphocyte reaction, and pentalenolactone I and cyclosporin A suppressed IL-2 production, however, hygromycin A did not. Hygromycin A may have immunosuppressant activity by a different mechanism from pentalenolactone I, cyclosporin A and tacrolimus.
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Affiliation(s)
- M Uyeda
- Faculty of Pharmaceutical Sciences, Kumamoto University, Japan.
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39
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Shimoyama M, Hayashi D, Zou Y, Takimoto E, Mizukami M, Monzen K, Yazaki Y, Nagai R, Komuro I. [Calcineurin inhibitor attenuates the development and induces the regression of cardiac hypertrophy in rats with salt-sensitive hypertension]. J Cardiol 2001; 37:114-8. [PMID: 11255695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
BACKGROUND It remains unclear how hemodynamic overload induces cardiac hypertrophy. Recently, activation of calcium-dependent phosphatase, calcineurin, has been elucidated to induce cardiac hypertrophy. In the present study, we examined the role of calcineurin in load-induced cardiac hypertrophy by using Dahl salt-sensitive (DS) rats, which develop both pressure and volume overload when fed a high salt diet. METHODS AND RESULTS In the DS rat heart, the activity of calcineurin was increased and cardiac hypertrophy was induced by high salt diet. Treatment of DS rats with the calcineurin inhibitor FK506 (0.1 or 0.01 mg/kg every second day) from the age of 6 weeks to 12 weeks inhibited the activation of calcineurin in the heart in a dose-dependent manner and attenuated the development of load-induced cardiac hypertrophy and fibrosis without change of hemodynamic parameters. Additionally, treatment with 0.1 mg/kg every second day but not with 0.01 mg/kg every second day of FK506 from the age of 12 weeks to 16 weeks induced regression of cardiac hypertrophy in DS rats. Load-induced reprogramming of gene expression was also suppressed by the FK506 treatment. CONCLUSIONS These results suggest that calcineurin is involved in the development of cardiac hypertrophy in rats with salt-sensitive hypertension and that inhibition of calcineurin could induce regression of cardiac hypertrophy.
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Affiliation(s)
- M Shimoyama
- Department of Cardiovascular Medicine, University of Tokyo Graduate School of Medicine, Tokyo
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40
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Zhu W, Shiojima I, Hiroi Y, Zou Y, Akazawa H, Mizukami M, Toko H, Yazaki Y, Nagai R, Komuro I. Functional analyses of three Csx/Nkx-2.5 mutations that cause human congenital heart disease. J Biol Chem 2000; 275:35291-6. [PMID: 10948187 DOI: 10.1074/jbc.m000525200] [Citation(s) in RCA: 47] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A homeodomain-containing transcription factor Csx/Nkx-2.5 is an important regulator of cardiogenesis in mammals. Three different mutants, Gln170ter (designated A) and Thr178Met (designated B) in the helix 2 of the homeodomain and Gln198ter mutation (designated C) just after homeodomain, have been reported to cause atrial septal defect with atrial ventricular block. We here examined the functions of these three mutants of Csx/Nkx-2.5. The atrial natriuretic peptide (ANP) promoter was activated by wild type Csx/Nkx-2.5 (WT, approximately 8-fold), B ( approximately 2-fold), and C ( approximately 6-fold) but not by A. When A, B, or C was cotransfected into COS-7 cells with the same amount of WT, WT-induced activation of the ANP promoter was attenuated by A and B (A > B), whereas C further enhanced the activation. Immunocytochemical analysis using anti-Myc tag antibody indicated that transfected Myc-tagged WT, B, and C were localized in the nucleus of both COS-7 cells and cardiomyocytes of neonatal rats, whereas A was distributed diffusely in the cytoplasm and nucleus in COS-7 cells. Electrophoretic mobility shift assay showed that Csx/Nkx-2.5-binding sequences were bound strongly by WT and C, weakly by B, but not by A. Immunoprecipitation and GST pull-down assay revealed that WT and all mutants interacted with GATA-4. The synergistic activation of the ANP promoter by WT and GATA-4 was further enhanced by C but was inhibited by A and B. In the cultured cardiomyocytes, overexpression of C but not WT, A, or B, induced apoptosis. These results suggest that although the three mutants induce the same cardiac phenotype, transactivation ability and DNA binding ability are different among the three mutants and that apoptosis may be a cause for C-induced cardiac defect.
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Affiliation(s)
- W Zhu
- Department of Cardiovascular Medicine, University of Tokyo Graduate School of Medicine, Tokyo 113-8655, Japan
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41
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Shimoyama M, Hayashi D, Zou Y, Takimoto E, Mizukami M, Monzen K, Kudoh S, Hiroi Y, Yazaki Y, Nagai R, Komuro I. Calcineurin inhibitor attenuates the development and induces the regression of cardiac hypertrophy in rats with salt-sensitive hypertension. Circulation 2000; 102:1996-2004. [PMID: 11034951 DOI: 10.1161/01.cir.102.16.1996] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND It remains unclear how hemodynamic overload induces cardiac hypertrophy. Recently, activation of calcium-dependent phosphatase, calcineurin, has been elucidated to induce cardiac hypertrophy. In the present study, we examined the role of calcineurin in load-induced cardiac hypertrophy by using Dahl salt-sensitive (DS) rats, which develop both pressure and volume overload when fed a high salt diet. METHODS AND RESULTS In the DS rat heart, the activity of calcineurin was increased and cardiac hypertrophy was induced by high salt diet. Treatment of DS rats with the calcineurin inhibitor FK506 (0.1 or 0.01 mg/kg twice daily) from the age of 6 weeks to 12 weeks inhibited the activation of calcineurin in the heart in a dose-dependent manner and attenuated the development of load-induced cardiac hypertrophy and fibrosis without change of hemodynamic parameters. Additionally, treatment with 0.1 mg/kg twice daily but not with 0.01 mg/kg twice daily of FK506 from the age of 12 weeks to 16 weeks induced regression of cardiac hypertrophy in DS rats. Load-induced reprogramming of gene expression was also suppressed by the FK506 treatment. CONCLUSIONS These results suggest that calcineurin is involved in the development of cardiac hypertrophy in rats with salt-sensitive hypertension and that inhibition of calcineurin could induce regression of cardiac hypertrophy.
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Affiliation(s)
- M Shimoyama
- Department of Cardiovascular Medicine, University of Tokyo Graduate School of Medicine, Tokyo, Japan
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42
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Zhu W, Zou Y, Shiojima I, Kudoh S, Aikawa R, Hayashi D, Mizukami M, Toko H, Shibasaki F, Yazaki Y, Nagai R, Komuro I. Ca2+/calmodulin-dependent kinase II and calcineurin play critical roles in endothelin-1-induced cardiomyocyte hypertrophy. J Biol Chem 2000; 275:15239-45. [PMID: 10809760 DOI: 10.1074/jbc.275.20.15239] [Citation(s) in RCA: 123] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Endothelin-1 (ET-1) induces cardiac hypertrophy. Because Ca(2+) is a major second messenger of ET-1, the role of Ca(2+) in ET-1-induced hypertrophic responses in cultured cardiac myocytes of neonatal rats was examined. ET-1 activated the promoter of the beta-type myosin heavy chain gene (beta-MHC) (-354 to +34 base pairs) by about 4-fold. This activation was inhibited by chelation of Ca(2+) and the blocking of protein kinase C activity. Similarly, the beta-MHC promoter was activated by Ca(2+) ionophores and a protein kinase C activator. beta-MHC promoter activation induced by ET-1 was suppressed by pretreatment with the calmodulin inhibitor, W7, the Ca(2+)/calmodulin-dependent kinase II (CaMKII) inhibitor, KN62, and the calcineurin inhibitor, cyclosporin A. beta-MHC promoter activation by ET-1 was also attenuated by overexpression of dominant-negative mutants of CaMKII and calcineurin. ET-1 increased the activity of CaMKII and calcineurin in cardiac myocytes. Pretreatment with KN62 and cyclosporin A strongly suppressed ET-1-induced increases in [(3)H]phenylalanine uptake and in cell size. These results suggest that Ca(2+) plays a critical role in ET-1-induced cardiomyocyte hypertrophy by activating CaMKII- and calcineurin-dependent pathways.
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Affiliation(s)
- W Zhu
- Department of Cardiovascular Medicine, University of Tokyo Graduate School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
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Miyauchi A, Ozawa M, Mizukami M, Yashiro K, Ebisu S, Tojo T, Fujii T, Takagi H. Structural conversion from non-native to native form of recombinant human epidermal growth factor by Brevibacillus choshinensis. Biosci Biotechnol Biochem 1999; 63:1965-9. [PMID: 10635560 DOI: 10.1271/bbb.63.1965] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Brevibacillus choshinensis (Bacillus brevis) HPD31 is a very efficient producer of recombinant human epidermal growth factor (EGF). The produced EGF is secreted into the medium with high efficiency. However part of the EGF that accumulates in the medium, exists as multimeric forms which are biologically inactive. We found the bacterium has the activity to structurally convert multimeric forms to the monomeric, native ones. Optimal temperature and pH for the conversion were 40 degrees C and pH 9, respectively. The reaction was promoted in the presence of reduced glutathione or cysteine. But the cells which had been sonicated or exposed to moderate heat treatment completely lost the activity. Thus, it was presumed that the activity might be due to the enzyme(s) that catalyze the protein disulfide exchanging reaction, and that they resides on the surface of viable cells.
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Affiliation(s)
- A Miyauchi
- R & D Department, Higeta Shoyu Co., Ltd., Chiba, Japan.
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44
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Nagumo S, Mizukami M, Akutsu N, Nishida A, Kawahara N. Alkylation of 4-hydroxyproline ester derivatives. Diastereoselectivity guided by the anomeric effect and π-interaction. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)00468-2] [Citation(s) in RCA: 28] [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] [Indexed: 11/16/2022]
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Obara T, Sawaya T, Hokari K, Umehara Y, Mizukami M, Tomita F. Removal of cadmium from scallop hepatopancreas by microbial processes. Biosci Biotechnol Biochem 1999; 63:500-5. [PMID: 10227136 DOI: 10.1271/bbb.63.500] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A microbial process for removing cadmium from a homogenate of hepatopancreas, a waste of scallop processing, was devised to use this waste for value-added protein resources. Microorganisms were screened on the basis of the ability to remove cadmium from a medium with the initial concentration of 10 mg/l of cadmium. One soil isolate, identified as Xanthomonas sp. UR No. 2 by its taxonomical characteristics, removed 98% of the cadmium in the medium in 2 d. During cultivation of this strain in the homogenates of hepatopancreas digested by endopeptidases, 90% of cadmium was removed, while this strain had little effect on the simple non-digested homogenates. The mass balance of cadmium during homogenizations of the hepatopancreas tissues and cultivations in the protease-treated homogenate were examined. The content of crude proteins of culture supernatant treated by Xanthomonas sp. UR No. 2 was equivalent to those of various feedstuffs on the market.
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Affiliation(s)
- T Obara
- Hakodate National College of Technology, Hokkaido, Japan.
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Tokunaga H, Yamakawa M, Mizukami M, Takagi H, Tokunaga M. Molecular cloning of the dnaK locus, and purification and characterization of a DnaK protein from Bacillus brevis HPD31. Biochim Biophys Acta 1998; 1387:65-79. [PMID: 9748507 DOI: 10.1016/s0167-4838(98)00108-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Using part of the dnaK gene from Bacillus subtilis as a probe, a 4. 4-kbp SacI-BglII fragment of chromosomal DNA of Bacillus brevis, a protein-hypersecreting bacterium, was cloned. Nucleotide sequencing revealed 3 open reading frames in the order of grpE-dnaK-dnaJ homologues. We purified DnaK protein to homogeneity from B. brevis HPD31 harboring a multi-copy dnaK expression plasmid. Purified DnaK showed ATPase activity which was synergistically stimulated 14-fold by the addition of glutathione S-transferase-DnaJ and glutathione S-transferase-GrpE fusion proteins. DnaK hydrolyzed not only ATP but also CTP, UTP, and GTP at about 40% of the efficiency of ATP. The specific activity of DnaK-ATPase was 7.25x10-3 unit/mg protein (the turnover number against ATP was 0.47 min-1) under our assay conditions. The DnaK dimers dissociated into monomers on addition of ATP, GTP, CTP, UTP and ATPgammaS, but not ADP or AMP. DnaK formed a stable complex with permanently unfolded carboxymethylated alpha-lactalbumin but not with native alpha-lactalbumin, and this complex was dissociated by addition of ATP/Mg. Formation of this complex was inhibited in the presence of inorganic phosphate.
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Affiliation(s)
- H Tokunaga
- Laboratory of Applied and Molecular Microbiology, Faculty of Agriculture, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890, Japan.
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Horiguchi T, Yoshida K, Sato S, Mizukami M, Kawase T, Toya S. [Analysis of abnormal findings observed on brain MRI T 2 weighted image in a system for the detection of asymptomatic brain disease in 1,200 cases]. No To Shinkei 1998; 50:821-6. [PMID: 9789305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
In this study we described the significance of asymptomatic cerebral infarction (ACI) and periventricular hyperintensity (PVH) observed on brain MRI in a system for detection of asymptomatic brain disease with 1,200 cases. The risk factors (RF), population in each age bracket of ACI and PVH, among groups with hypertension (HTG) and without RF (no-RFG), were investigated. The RF of ACI were hypertension (HT), diabetes mellitus (DM), and aging. Without DM, those are common RF of PVH. The population of PVH and ACI with PVH increased with aging in no -RFG. On the other hand, only the population of ACI with PVH increased with aging in HTG. The rate of these abnormal findings in HTG was significantly higher than that in no-RFG. In addition, HT accelerated the occurrence of these findings by 10-20 years. When patients were over 60 years old, ACI increased rapidly. Accordingly, we concluded that (1) PVH and ACI had a common background. (2) Long term follow up concerning the incidence of ACI in the group with only PVH was necessary. (3) It was desirable that treatment for RF should be effected before the age of sixty.
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Affiliation(s)
- T Horiguchi
- Department of Neurosurgery, Keio University School of Medicine, Tokyo, Japan
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Suyama T, Nihei R, Kimura T, Yano H, Tobimatsu Y, Hatsuyama Y, Nakamura R, Mizukami M. Rehabilitation of spinal cord injury in the national rehabilitation center for the disabled of Japan: profile of a spinal service. Spinal Cord 1997; 35:720-4. [PMID: 9392040 DOI: 10.1038/sj.sc.3100534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The National Rehabilitation Center for the Disabled (hereunder abbreviated NRC) in Japan was established in 1979. It consists of four divisions: the hospital, the rehabilitation training center, the research institute, and the information service section. The spinal unit has been functioning and cooperating corelatively with all of these divisions. There were 1047 patients with a spinal cord injury treated in the 15 years from September, 1980 to August, 1994; consisting of 924 males (88.3%), and 123 females (11.7%). The breakdown of causes of injury were traffic accidents 44.9%, having a fall 14.7%, sports accidents 6.7%, and other causes of spinal paralysis 10.5%. The sites of the spinal cord lesions were cervical 372 (35.5%), thoracic 547 (52.5%), and lumbar spinal cord 128 patients (12.3%). The incidence of complete paralysis in those with a cervical spinal cord injury (SCI) was 68.8%, and for thoracic and lumbar SCI 79% each. The time for completion of activities of daily living (ADL) was 12.0 +/- 1.54 months in those with tetraplegia, and 5.6 +/- 1.71 months for those with paraplegia. The rate of employment for reentry into society was 59% in those with a cervical spinal cord injury, and 74% each in those with a thoracic or lumbar spinal cord injury.
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Affiliation(s)
- T Suyama
- Department of Orthopedics, National Rehabilitation Center for the Disabled Hospital, Saitama Prefecture, Japan
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Mizukami M, Hirano M, Ohira F. Simultaneous alignment of optical axes by monitoring reflected light from core and cladding. Appl Opt 1997; 36:5918-5922. [PMID: 18259430 DOI: 10.1364/ao.36.005918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We propose a method of aligning optical axes by monitoring reflected light from the core and the cladding at the coupling end. This method enables the simultaneous alignment of optical axes at multiple coupling ends because it is not necessary to monitor the transmitted light through the couplings. Experimental results show that this method can be used for coupling between cleaved single-mode fibers and between fibers with slant ends. The simultaneous alignment of two coupling ends is also achieved, and it is shown to obtain the optical power transmitted through the coupling, which is enough to begin the precise alignment. Moreover, we confirm fundamentally that one can use this method for precise alignment of optical axes by monitoring the optical beam profiles of the reflected light.
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Mizukami M, Onizawa K, Fufuya Y, Hagiwara T, Yoshida H. Squamous cell carcinoma arising in an odontogenic keratocyst report of two cases. Int J Oral Maxillofac Surg 1997. [DOI: 10.1016/s0901-5027(97)81013-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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