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Kanezaki S, Miyazaki M, Sakamoto T, Hino A, Abe T, Sako N, Tsumura H. Dome impaction classification in acetabular fractures: Identifying atypical dome impactions with absence of the gull sign: A retrospective descriptive study. Medicine (Baltimore) 2023; 102:e35523. [PMID: 37861513 PMCID: PMC10589566 DOI: 10.1097/md.0000000000035523] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 09/15/2023] [Indexed: 10/21/2023] Open
Abstract
We aimed to describe variations of dome impaction fractures and their characteristics using a new classification system, to explore the relationship between dome impaction and the gull sign. The present study was a retrospective descriptive study. All 104 cases of acetabular fracture that were treated in our institution from 2013 to 2022 were enrolled. Of these, 22 had dome impaction fractures. The primary outcome variable was to describe the variations and characteristics of dome impaction fractures. They were classified into 3 major subgroups based on reconstructed axial, coronal, and sagittal computed tomography findings: anteromedial, superomedial (SM), and posteromedial. The secondary outcome variable was to explore the relationship between dome impaction on computed tomography findings and the gull sign on plain radiographs. There were 4 cases of anteromedial (18.2%), 13 of SM (59.1%), and 5 of posteromedial (22.7%). There were 15 cases (68.2%) with the gull sign and 7 cases (31.8%) without the gull sign on plain radiographs. Twelve of fifteen cases (80.0%) with the gull sign had dome impaction fractures of the SM type. We found a variety of patterns of dome impaction fracture. Surgeons should be aware of atypical dome impactions not showing the gull sign.
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Affiliation(s)
- Shozo Kanezaki
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita, Japan
- Advanced Trauma, Emergency, and Critical Care Center, Oita University Hospital, Oita, Japan
| | - Masashi Miyazaki
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita, Japan
| | - Tomonori Sakamoto
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita, Japan
- Advanced Trauma, Emergency, and Critical Care Center, Oita University Hospital, Oita, Japan
| | - Akihiro Hino
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita, Japan
- Advanced Trauma, Emergency, and Critical Care Center, Oita University Hospital, Oita, Japan
| | - Tetsutaro Abe
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita, Japan
| | - Noriaki Sako
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita, Japan
| | - Hiroshi Tsumura
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita, Japan
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Sato Y, Sumikawa H, Shibaki R, Morimoto T, Sakata Y, Oya Y, Tamiya M, Suzuki H, Matsumoto H, Kijima T, Hashimoto K, Kobe H, Hino A, Inaba M, Tsukita Y, Ikeda H, Arai D, Maruyama H, Sakata S, Fujimoto D. 1103P Drug-related pneumonitis induced by osimertinib as first-line treatment for EGFR-positive non-small cell lung cancer: A real-world setting. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1228] [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: 11/27/2022] Open
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3
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Sato Y, Ikeda S, Kato T, Kenmotsu H, Ogura T, Hino A, Harada T, Kubota K, Tokito T, Okamoto I, Furuya N, Yokoyama T, Hosokawa S, Iwasawa T, Kasajima R, Miyagi Y, Misumi T, Yamanaka T, Okamoto H. 1285P Final analysis of TORG1936/AMBITIOUS: Phase II study of atezolizumab for pretreated non-small cell lung cancer with idiopathic interstitial pneumonia. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1887] [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: 11/26/2022] Open
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Funase Y, Nakamura E, Kajita M, Saito Y, Oshikiri S, Kitano M, Tokura M, Hino A, Uehara T. Preclinical Characterization of the Radioimmunoconjugate 111In or 90Y-FF-21101 Against a P-Cadherin-Expressing Tumor in a Mouse Xenograft Model and a Nonhuman Primate. J Nucl Med 2020; 62:232-239. [PMID: 32737245 PMCID: PMC8679590 DOI: 10.2967/jnumed.120.245837] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 06/26/2020] [Indexed: 12/24/2022] Open
Abstract
P-cadherin is overexpressed in various cancers and can be a target for radioimmunotherapy. We investigated the preclinical pharmacokinetics and pharmacology of FF-21101, an 111In- or 90Y-conjugated monoclonal antibody against P-cadherin, to evaluate its clinical applications. Methods: The radiochemical purity, binding affinity, and in vitro serum stability of 111In or 90Y-labeled FF-21101 were evaluated. The pharmacokinetics of 111In or 90Y-FF-21101 were compared in normal mice. Tumor accumulation after 111In-FF-21101 administration was investigated in mice bearing subcutaneous tumors with high (NCI-H1373), moderate (EBC-1), or no (A549) P-cadherin expression. The tumor suppression effect after a single intravenous injection of 90Y-FF-21101 was assessed in NCI-H1373 and EBC-1 mouse xenograft models. The relationship between antibody dose and tumor accumulation was investigated in the NCI-H1373 mouse xenograft model. The absorbed radiation dose in humans after injection of 90Y-FF-21101 was estimated using γ-camera images of cynomolgus monkeys. Results: The radiochemical purities of 111In- and 90Y-FF-21101 were 98.2% ± 2.5% (n = 9) and 99.3% ± 0.6% (n = 5), respectively. The dissociation constants were 1.083 nM for 111In-FF-21101 and 1.367 nM for 90Y-FF-21101. Both 111In- and 90Y-FF-21101 were stable in human serum after 96 h of incubation and exhibited similar pharmacokinetics in normal mice. The tumor accumulation of 111In-FF-21101 was closely related to the intensity of P-cadherin expression in the cells. 90Y-FF-21101 showed significant tumor growth inhibition, indicating that NCI-H1373 and EBC-1 recurrence was not observed after intravenous administration of 3.7 and 7.4 MBq, respectively of 90Y-FF-21101 per animal. Tumor uptake in the mouse xenograft model and estimated absorbed radiation doses in the spleen of monkeys decreased with increasing antibody doses of 111In-FF-21101. Conversely, the estimated absorbed radiation dose in the red marrow increased with increasing antibody dose. An antibody dose of 4.8 mg/m2 was considered appropriate for humans, on the basis of efficacy and safety. The maximum tolerated administered activity of 90Y-FF-21101 was estimated to be 2,886 MBq/human. Conclusion: FF-21101 radioimmunotherapy exhibited high antitumor affinity and antitumor efficacy in mouse xenograft models. Extrapolation of the pharmacokinetics in monkeys to humans suggests the potential for clinical application of FF-21101 for treating P-cadherin–expressing tumor.
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Affiliation(s)
- Yuichi Funase
- RI Research Department, Fujifilm Toyama Chemical Co., Ltd., Chiba, Japan .,Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan; and
| | - Eri Nakamura
- RI Research Department, Fujifilm Toyama Chemical Co., Ltd., Chiba, Japan
| | - Masamichi Kajita
- RI Research Department, Fujifilm Toyama Chemical Co., Ltd., Chiba, Japan
| | - Yasutaka Saito
- RI Research Department, Fujifilm Toyama Chemical Co., Ltd., Chiba, Japan
| | - Shinobu Oshikiri
- RI Research Department, Fujifilm Toyama Chemical Co., Ltd., Chiba, Japan
| | - Michi Kitano
- RI Research Department, Fujifilm Toyama Chemical Co., Ltd., Chiba, Japan
| | - Masahiko Tokura
- Project Management Department, Fujifilm Toyama Chemical Co., Ltd., Tokyo, Japan
| | - Akihiro Hino
- RI Research Department, Fujifilm Toyama Chemical Co., Ltd., Chiba, Japan
| | - Tomoya Uehara
- Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan; and
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Oshikiri S, Uehara T, Suzuki H, Koike-Satake M, Hino A, Arano Y. Zn Complex of Diaminedithiol Tetradentate Ligand as a Stable Precursor for 99mTc-Labeled Compounds. Molecules 2020; 25:molecules25020254. [PMID: 31936303 PMCID: PMC7024331 DOI: 10.3390/molecules25020254] [Citation(s) in RCA: 3] [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: 11/28/2019] [Revised: 12/22/2019] [Accepted: 12/27/2019] [Indexed: 12/02/2022] Open
Abstract
The diaminedithiol (N2S2) tetradentate ligand constitutes a useful chelating molecule for preparing 99mTc-labeled compounds of high in vivo stability in high radiochemical yields. However, since the thiol groups in the N2S2 ligand are easy to be oxidized to disulfide bonds, they need to be protected with an appropriate protecting group, which hinders the broad applications of the N2S2 ligand for radiopharmaceuticals. In this study, a Zn chelate of N2S2 was evaluated as a precursor for purification-free 99mTc-labeled N2S2 under the mild and simple procedure. Zn-N2S2 was prepared by reacting Zn acetate with N2S2, and the Zn-N2S2 remained stable under aerobic conditions at room temperature. 99mTc-N2S2 was obtained over 90% radiochemical yields at room temperature by a one-pot reaction, consisting of Zn-N2S2 (10−5 M), 99mTcO4−, ethylenediaminetetraacetic acid (EDTA), and a reducing agent (Sn2+) at pH = 5.5 to 7.5. 99mTc-N2S2 was also obtained over 90% radiochemical yields when the reaction was conducted in the presence of an equimolar amount of IgG antibody. These findings indicate the Zn complex of N2S2 ligand constitutes a stable and useful precursor to prepare 99mTc-labeled N2S2 compounds in high yields under the mild and simple procedure.
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Affiliation(s)
- Shinobu Oshikiri
- RI Research Department, FUJIFILM Toyama Chemical Co., Ltd., Chiba 289-1592, Japan; (M.K.-S.); (A.H.)
- Correspondence: ; Tel.: +81-479-86-4722; Fax: +81-479-86-3522
| | - Tomoya Uehara
- Laboratory of Molecular Imaging and Radiotherapy, Chiba University, Chiba 260-8675, Japan; (T.U.); (H.S.); (Y.A.)
| | - Hiroyuki Suzuki
- Laboratory of Molecular Imaging and Radiotherapy, Chiba University, Chiba 260-8675, Japan; (T.U.); (H.S.); (Y.A.)
| | - Miho Koike-Satake
- RI Research Department, FUJIFILM Toyama Chemical Co., Ltd., Chiba 289-1592, Japan; (M.K.-S.); (A.H.)
| | - Akihiro Hino
- RI Research Department, FUJIFILM Toyama Chemical Co., Ltd., Chiba 289-1592, Japan; (M.K.-S.); (A.H.)
| | - Yasushi Arano
- Laboratory of Molecular Imaging and Radiotherapy, Chiba University, Chiba 260-8675, Japan; (T.U.); (H.S.); (Y.A.)
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Kodama T, Kuribara H, Minegishi Y, Futo S, Watai M, Sawada C, Watanabe T, Akiyama H, Maitani T, Teshima R, Furui S, Hino A, Kitta K. Evaluation of Modified PCR Quantitation of Genetically Modified Maize and Soybean Using Reference Molecules: Interlaboratory Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/92.1.223] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Real-time polymerase chain reaction (PCR)-based quantitative methods were previously developed and validated for genetically modified (GM) maize or soy. In this study, the quantification step of the validated methods was modified, and an interlaboratory study was conducted. The modification included the introduction of the PCR system SSIIb 3 instead of SSIIb 1 for the detection of the taxon-specific sequence of maize, as well as the adoption of colE1 as a carrier included in a reference plasmid solution as a replacement for salmon testis. The interlaboratory study was conducted with the ABI PRISM<sup/> 7700 and consisted of 2 separate stages: (1) the measurement of conversion factor (Cf) value, which is the ratio of recombinant DNA (r-DNA) sequence to taxon-specific sequence in each genuine GM seed, and (2) the quantification of blind samples. Additionally, Cf values of other instruments, such as the ABI PRISM 7900 and the ABI PRISM 7000, were measured in a multilaboratory trial. After outlier laboratories were eliminated, the repeatability and reproducibility for 5.0 samples were <15.8 and 20.6, respectively. The quantitation limits of these methods were 0.5 for Bt11, T25, and MON810, and 0.1 for GA21, Event176, and RR soy. The quantitation limits, trueness, and precision of the current modified methods were equivalent to those of the previous methods. Therefore, it was concluded that the modified methods would be a suitable replacement for the validated methods.
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Affiliation(s)
- Takashi Kodama
- Food and Agricultural Materials Inspection Center, 2-1 Shintoshin, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan
| | - Hideo Kuribara
- Food and Agricultural Materials Inspection Center, 2-1 Shintoshin, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan
| | - Yasutaka Minegishi
- NIPPON GENE, Co., Ltd, 1-5 Kandanishiki-cho, Chiyoda-ku, Toyko 101-0054, Japan
| | - Satoshi Futo
- FASMAC Co, Ltd, 5-1-3 Midorigaoka, Atsugi, Kanagawa 243-0041, Japan
| | - Masatoshi Watai
- Japan Food Research Laboratories, 6-11-10 Nagayama, Tama, Tokyo 206-0025, Japan
| | - Chihiro Sawada
- Japan Frozen Foods Inspection Corp, 2-13-45 Fukuura, Kanazawa-ku, Yokohama-shi, Kanagawa 658-0033, Japan
| | - Takahiro Watanabe
- National Institute of Health Sciences, Ministry of Health, Labor and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Hiroshi Akiyama
- National Institute of Health Sciences, Ministry of Health, Labor and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Tamio Maitani
- National Institute of Health Sciences, Ministry of Health, Labor and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Reiko Teshima
- National Institute of Health Sciences, Ministry of Health, Labor and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Satoshi Furui
- National Agriculture and Food Research Organization, National Food Research Institute, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan
| | - Akihiro Hino
- National Agriculture and Food Research Organization, National Food Research Institute, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan
| | - Kazumi Kitta
- National Agriculture and Food Research Organization, National Food Research Institute, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan
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Kodama T, Kasahara M, Minegishi Y, Futo S, Sawada C, Watai M, Akiyama H, Teshima R, Kurosawa Y, Furui S, Hino A, Kitta K. Qualitative PCR Method for Roundup Ready® Soybean: Interlaboratory Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/94.1.224] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Quantitative and qualitative methods based on PCR have been developed for genetically modified organisms (GMO). Interlaboratory studies were previously conducted for GMO quantitative methods; in this study, an interlaboratory study was conducted for a qualitative method for a GM soybean, Roundup Ready® soy (RR soy), with primer pairs designed for the quantitative method of RR soy studied previously. Fourteen laboratories in Japan participated. Each participant extracted DNA from 1.0 g each of the soy samples containing 0, 0.05, and 0.10% of RR soy, and performed PCR with primer pairs for an internal control gene (Le1) and RR soy followed by agarose gel electrophoresis. The PCR product amplified in this PCR system for Le1 was detected from all samples. The sensitivity, specificity, and false-negative and false-positive rates of the method were obtained from the results of RR soy detection. False-negative rates at the level of 0.05 and 0.10% of the RR soy samples were 6.0 and 2.3%, respectively, revealing that the LOD of the method was somewhat below 0.10%. The current study demonstrated that the qualitative method would be practical for monitoring the labeling system of GM soy in kernel lots.
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Affiliation(s)
- Takashi Kodama
- Food and Agricultural Materials Inspection Center, 2-1 Shintoshin, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan
| | - Masaki Kasahara
- Food and Agricultural Materials Inspection Center, 2-1 Shintoshin, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan
| | - Yasutaka Minegishi
- NIPPON GENE, Co., Ltd, 1-5 Kandanishiki-cho, Chiyoda-ku, Tokyo 101-0054, Japan
| | - Satoshi Futo
- FASMAC Co, Ltd, 5-1-3 Midorigaoka, Atsugi, Kanagawa 243-0041, Japan
| | - Chihiro Sawada
- Japan Frozen Foods Inspection Corp, 2-13-45 Fukuura, Kanazawa-ku, Yokohama-shi, Kanagawa 236-0004, Japan
| | - Masatoshi Watai
- Japan Food Research Laboratories, 6-11-10 Nagayama, Tama, Tokyo 206-0025, Japan
| | - Hiroshi Akiyama
- National Institute of Health Sciences, Ministry of Health, Labor and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Reiko Teshima
- National Institute of Health Sciences, Ministry of Health, Labor and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Yasunori Kurosawa
- National Agriculture and Food Research Organization, National Food Research Institute, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan
| | - Satoshi Furui
- National Agriculture and Food Research Organization, National Food Research Institute, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan
| | - Akihiro Hino
- National Agriculture and Food Research Organization, National Food Research Institute, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan
| | - Kazumi Kitta
- National Agriculture and Food Research Organization, National Food Research Institute, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan
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Kuribara H, Shindo Y, Matsuoka T, Takubo K, Futo S, Aoki N, Hirao T, Akiyama H, Goda Y, Toyada M, Hino A. Novel Reference Molecules for Quantitation of Genetically Modified Maize and Soybean. J AOAC Int 2019. [DOI: 10.1093/jaoac/85.5.1077] [Citation(s) in RCA: 214] [Impact Index Per Article: 42.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
New quantitation methods based on a real-time polymerase chain reaction (PCR) technique were developed for 5 lines of genetically modified (GM) maize, including MON810, Event176, Bt11, T25, and GA21, and a GM soy, Roundup Ready. Oligonucleotide DNA, including specific primers and fluorescent dye, labeled probes, were designed for PCRs. Two plasmids were constructed as reference molecules (RMs) for the detection of GM maize and GM soy. The molecules contain the DNA sequences of a specific region found in each GM line, universal sequences used in various GM lines, such as cauliflower mosaic virus 35S promoter and nopaline synthase terminator, and the endogenous DNA sequences of maize or soy. By using these plasmids, no GM maize and GM soy were required as reference materials for the qualitative and quantitative PCR technique. Test samples containing 0, 0.10, 0.50, 1.0, 5.0, and 10% GM maize or GM soy were quantitated. At the 5.0%level, the bias (mean–true value) ranged from 2.8 to 19.4% and the relative standard deviation was <5.2%. These results show that our method involving the use of these plasmids as RMs is reliable and practical for quantitation of GM maize and GM soy.
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Affiliation(s)
- Hideo Kuribara
- Center for Food Quality, Labeling and Consumer Services, 1-21-2 Kitabukuro, Saitama, Saitama 330-9731, Japan
| | - Yoichiro Shindo
- Asahi Breweries Ltd., 1-1-21 Midori, Moriya, Kitasoma-gun, Ibaraki 302-0106, Japan
| | - Takeshi Matsuoka
- Center for Food Quality, Labeling and Consumer Services, 1-21-2 Kitabukuro, Saitama, Saitama 330-9731, Japan
| | - Ken Takubo
- Center for Food Quality, Labeling and Consumer Services, 1-21-2 Kitabukuro, Saitama, Saitama 330-9731, Japan
| | - Satoshi Futo
- FASMAC Co. Ltd.,5-1-3 Midorigaoka, Atsugi, Kanagawa 243-0041, Japan
| | - Nobutaro Aoki
- Japan Food Research Laboratories, 6-11-10 Nagayama, Tama, Tokyo 206-0025, Japan
| | - Takashi Hirao
- Somatech Center, House Foods Co., 1-4 Takanodai, Yotsukaido, Chiba 284-0033, Japan
| | - Hiroshi Akiyama
- National Institute of Health Sciences, Ministry of Health, Labour and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Yukihiro Goda
- National Institute of Health Sciences, Ministry of Health, Labour and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Masatake Toyada
- National Institute of Health Sciences, Ministry of Health, Labour and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Akihiro Hino
- National Food Research Institute, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan
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Shindo Y, Kuribara H, Matsuoka T, Futo S, Sawada C, Shono J, Akiyama H, Goda Y, Toyoda M, Hino A, Asano T, Hiramoto M, Iwaya A, Jeong SI, Kajiyama N, Kato H, Katsumoto H, Kim YM, Kwak HS, Ogawa M, Onozuka Y, Takubo K, Yamakawa H, Yamazaki F, Yoshida A, Yoshimura T. Validation of Real-Time PCR Analyses for Line-Specific Quantitation of Genetically Modified Maize and Soybean UsingNew Reference Molecules. J AOAC Int 2019. [DOI: 10.1093/jaoac/85.5.1119] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Novel analytical methods based on real-time quantitative polymerase chain reactions by use of new reference molecules were validated in interlaboratory studies for the quantitation of genetically modified (GM) maize and soy. More than 13 laboratories from Japan, Korea, and the United States participated in the studies. The interlaboratory studies included 2 separate stages: (1) measurement tests of coefficient values, the ratio of recombinant DNA (r-DNA) sequence, and endogenous DNA sequence in the seeds of GM maize and GM soy; and (2) blind tests with 6 pairs of maize and soy samples, including different levels of GM maize or GM soy. Test results showed that the methods are applicable to the specific quantitation of the 5 lines of GM maize and one line of GM soy. After statistical treatment to remove outliers, the repeatability and reproducibility of these methods at a level of 5.0% were <13.7 and 15.9%, respectively. The quantitation limits of the methods were 0.50% for Bt11, T25, and MON810, and 0.10% for GA21, Event176, and Roundup Ready soy. The results of blind tests showed that the numerical information obtained from these methods will contribute to practical analyses for labeling systems of GM crops.
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Affiliation(s)
- Yoichiro Shindo
- Fundamental Research Laboratory, Asahi Breweries Ltd., 1-1-21 Midori, Moriya, Kitasoma-gun, Ibaraki 302-0106, Japan
| | - Hideo Kuribara
- Center for Food Quality, Labeling and Consumer Services, 1-21-2 Kitabukuro, Saitama, Saitama 330-9731, Japan
| | - Takeshi Matsuoka
- Center for Food Quality, Labeling and Consumer Services, 1-21-2 Kitabukuro, Saitama, Saitama 330-9731, Japan
| | - Satoshi Futo
- FASMAC Co., Ltd., 5-1-3 Midorigaoka, Atsugi, Kanagawa 243-0041, Japan
| | - Chihiro Sawada
- Japan Frozen Foods Inspection Corp., Nishi-1 Koyo, Higashinada-ku, Kobe, Hyogo 658-0033, Japan
| | - Jinji Shono
- Somatech Center, House Foods Co., 1-4 Takanodai, Yotsukaido, Chiba 284-0033, Japan
| | - Hiroshi Akiyama
- National Institute of Health Sciences, Ministry of Health, Labour and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Yukihiro Goda
- National Institute of Health Sciences, Ministry of Health, Labour and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Masatake Toyoda
- National Institute of Health Sciences, Ministry of Health, Labour and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Akihiro Hino
- National Food Research Institute, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan
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Kobayashi S, Myoren T, Kajii T, Kohno M, Nanno T, Ishiguchi H, Nishimura S, Fukuda M, Hino A, Fujimura T, Ono M, Uchinoumi H, Tateishi H, Mochizuki M, Oda T, Okuda S, Yoshiga Y, Kawano R, Yano M. Addition of a β1-Blocker to Milrinone Treatment Improves Cardiac Function in Patients with Acute Heart Failure and Rapid Atrial Fibrillation. Cardiology 2019; 142:195-202. [PMID: 31137022 DOI: 10.1159/000499400] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 03/05/2019] [Indexed: 11/19/2022]
Abstract
BACKGROUND Tachycardia worsens cardiac performance in acute decompensated heart failure (ADHF). We investigated whether heart rate (HR) optimization by landiolol, an ultra-short-acting β1-selective blocker, in combination with milrinone improved cardiac function in patients with ADHF and rapid atrial fibrillation (AF). METHODS AND RESULTS We enrolled9 ADHF patients (New York Heart Association classification IV; HR, 138 ± 18 bpm; left ventricular [LV] ejection fraction, 28 ± 8%; cardiac index [CI], 2.1 ± 0.3 L/min-1/m-2; pulmonary capillary wedge pressure [PCWP], 24 ± 3 mm Hg), whose HRs could not be reduced using standard treatments, including diuretics, vasodilators, and milrinone. Landiolol (1.5-6.0 µg/kg-1/min-1, intravenous) was added to milrinone treatment to study its effect on hemodynamics. The addition of landiolol (1.5 µg/kg-1/min-1) significantly reduced HR by 11% without changing systolic blood pressure (BP) and resulted in a significant decrease in PCWP and a significant increase in stroke volume index (SVI), suggesting that HR reduction restores incomplete LV relaxation. Administration of more than 3.0 µg/kg-1/min-1 of landiolol decreased BP, CI, and SVI. CONCLUSION The addition of landiolol at doses of <3.0 µg/kg/min to milrinone improved cardiac function in decompensated chronic heart failure with rapid atrial fibrillation by selectively reducing HR.
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Affiliation(s)
- Shigeki Kobayashi
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan,
| | - Takeki Myoren
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Toshiro Kajii
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Michiaki Kohno
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Takuma Nanno
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Hironori Ishiguchi
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Shigehiko Nishimura
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Masakazu Fukuda
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Akihiro Hino
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Tatsuhiro Fujimura
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Makoto Ono
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Hitoshi Uchinoumi
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Hiroki Tateishi
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Mamoru Mochizuki
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Tetsuro Oda
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Shinichi Okuda
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Yasuhiro Yoshiga
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Reo Kawano
- Center for Integrated Medical Research, Hiroshima University Hospital, Hiroshima, Japan
| | - Masafumi Yano
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
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11
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Shimazu K, Fukumitsu S, Ishijima T, Toyoda T, Nakai Y, Abe K, Aida K, Okada S, Hino A. The Anti-Arthritis Effect of Olive-Derived Maslinic Acid in Mice is Due to its Promotion of Tissue Formation and its Anti-Inflammatory Effects. Mol Nutr Food Res 2018; 63:e1800543. [DOI: 10.1002/mnfr.201800543] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 11/05/2018] [Indexed: 12/23/2022]
Affiliation(s)
- Kyoko Shimazu
- Innovation Center; Nippon Flour Mills Co., Ltd.; 5-1-3 Midorigaoka Atsugi Kanagawa Japan
| | - Satoshi Fukumitsu
- Innovation Center; Nippon Flour Mills Co., Ltd.; 5-1-3 Midorigaoka Atsugi Kanagawa Japan
| | - Tomoko Ishijima
- Graduate School of Agricultural and Life Science; The University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo Japan
| | - Tsudoi Toyoda
- Graduate School of Agricultural and Life Science; The University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo Japan
| | - Yuji Nakai
- Institute for Food Sciences; Hirosaki University; 2-1-1 Yanagawa Aomori Aomori Japan
| | - Keiko Abe
- Graduate School of Agricultural and Life Science; The University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo Japan
- Group of Food Functionality Assessment; Kanagawa Institute of Industrial Science and Technology; 3-25-13 Tonomachi Kawasaki-ku, Kawasaki Kanagawa Japan
| | - Kazuhiko Aida
- Innovation Center; Nippon Flour Mills Co., Ltd.; 5-1-3 Midorigaoka Atsugi Kanagawa Japan
| | - Shinji Okada
- Graduate School of Agricultural and Life Science; The University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo Japan
| | - Akihiro Hino
- Innovation Center; Nippon Flour Mills Co., Ltd.; 5-1-3 Midorigaoka Atsugi Kanagawa Japan
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12
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Takezawa H, Katsumori T, Tamura A, Fujii A, Goto Y, Yokoya S, Oka H, Hashimoto Y, Hino A. Two neuro-interventionists treated twice or more patients than one neuro-interventionist did. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3118] [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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13
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Fukumitsu S, Kinoshita T, Villareal MO, Aida K, Hino A, Isoda H. Maslinic acid improves quality of life by alleviating joint knee pain in the elderly: results from a community-based pilot study. J Clin Biochem Nutr 2017; 61:67-73. [PMID: 28751812 PMCID: PMC5525013 DOI: 10.3164/jcbn.16-119] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 01/25/2017] [Indexed: 12/27/2022] Open
Abstract
Chronic knee joint pain is common in the elderly and associated with poor quality of life. This study, an open-label clinical trial, aimed to examine how the intake on a daily basis of maslinic acid-containing product (30 mg maslinic acid) on 29 elderly residents (mean 70.7 ± 10.1 years) of Nakajima Island, Ehime, Japan. Study participants consumed 10 g jelly containing maslinic acid daily for 16 weeks and at 0 (baseline), 4, 8, 12 and 16 weeks, assessed for health-related quality of life (Short Form-8) and knee pain score (Japanese Knee Osteoarthritis Measure). After 16 weeks, the physical quality of life, more specifically, the level of Bodily Pain and Physical Component Summary, but not mental quality of life, was significantly improved by maslinic acid intake. Furthermore, maslinic acid intake significantly decreased the Japanese Knee Osteoarthritis Measure at week 8 and tended to decrease Visual Analogue Scale score at weeks 4 and 16. These results suggest that consumption of maslinic acid has a protective effect against chronic knee pain in elderly residents in a community where knee pain causes high quality of life burden.
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Affiliation(s)
- Satoshi Fukumitsu
- Nippon Flour Mills Co., Ltd., Innovation Center, 5-1-3 Midorigaoka, Atsugi, Kanagawa 243-0041, Japan.,Alliance for Research on North Africa (ARENA), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Tetsu Kinoshita
- Institute of Community Life Sciences Co., Ltd., Social Epidemiology Institute, Matsuyama, Ehime 791-1102, Japan
| | - Myra O Villareal
- Alliance for Research on North Africa (ARENA), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.,Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Kazuhiko Aida
- Nippon Flour Mills Co., Ltd., Innovation Center, 5-1-3 Midorigaoka, Atsugi, Kanagawa 243-0041, Japan
| | - Akihiro Hino
- Nippon Flour Mills Co., Ltd., Innovation Center, 5-1-3 Midorigaoka, Atsugi, Kanagawa 243-0041, Japan
| | - Hiroko Isoda
- Alliance for Research on North Africa (ARENA), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.,Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
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14
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Kato T, Yamamoto T, Nakamura Y, Nanno T, Fukui G, Sufu Y, Hamada Y, Maeda T, Nishimura S, Ishiguchi H, Murakami W, Fukuda M, Xu X, Hino A, Ono M, Oda T, Okuda S, Kobayashi S, Koseki N, Kyushiki H, Yano M. Correction of impaired calmodulin binding to RyR2 as a novel therapy for lethal arrhythmia in the pressure-overloaded heart failure. Heart Rhythm 2017; 14:120-127. [DOI: 10.1016/j.hrthm.2016.10.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Indexed: 11/29/2022]
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15
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Murakami W, Kobayashi S, Susa T, Nanno T, Ishiguchi H, Myoren T, Nishimura S, Kato T, Hino A, Oda T, Okuda S, Yamamoto T, Yano M. Recombinant Atrial Natriuretic Peptide Prevents Aberrant Ca2+ Leakage through the Ryanodine Receptor by Suppressing Mitochondrial Reactive Oxygen Species Production Induced by Isoproterenol in Failing Cardiomyocytes. PLoS One 2016; 11:e0163250. [PMID: 27657534 PMCID: PMC5033569 DOI: 10.1371/journal.pone.0163250] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 09/05/2016] [Indexed: 12/27/2022] Open
Abstract
Catecholamines induce intracellular reactive oxygen species (ROS), thus enhancing diastolic Ca2+ leakage through the ryanodine receptor during heart failure (HF). However, little is known regarding the effect of atrial natriuretic peptide (ANP) on ROS generation and Ca2+ handling in failing cardiomyocytes. The aim of the present study was to clarify the mechanism by which an exogenous ANP exerts cardioprotective effects during HF. Cardiomyocytes were isolated from the left ventricles of a canine tachycardia-induced HF model and sham-operated vehicle controls. The degree of mitochondrial oxidized DNA was evaluated by double immunohistochemical (IHC) staining using an anti-VDAC antibody for the mitochondria and an anti-8-hydroxy-2′-deoxyguanosine antibody for oxidized DNA. The effect of ANP on ROS was investigated using 2,7-dichlorofluorescin diacetate, diastolic Ca2+ sparks assessed by confocal microscopy using Fluo 4-AM, and the survival rate of myocytes after 48 h. The double IHC study revealed that isoproterenol (ISO) markedly increased oxidized DNA in the mitochondria in HF and that the ISO-induced DNA damage was markedly inhibited by the co-presence of ANP. ROS production and Ca2+ spark frequency (CaSF) were increased in HF compared to normal controls, and were further increased in the presence of ISO. Notably, ANP significantly suppressed both ISO-induced ROS and CaSF without changing sarcoplasmic reticulum Ca2+ content in HF (p<0.01, respectively). The survival rate after 48 h in HF was significantly decreased in the presence of ISO compared with baseline (p<0.01), whereas it was significantly improved by the co-presence of ANP (p<0.01). Together, our results suggest that ANP strongly suppresses ISO-induced mitochondrial ROS generation, which might correct aberrant diastolic Ca2+ sparks, eventually contributing to the improvement of cardiomyocyte survival in HF.
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Affiliation(s)
- Wakako Murakami
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755–8505, Japan
| | - Shigeki Kobayashi
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755–8505, Japan
- * E-mail:
| | - Takehisa Susa
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755–8505, Japan
| | - Takuma Nanno
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755–8505, Japan
| | - Hironori Ishiguchi
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755–8505, Japan
| | - Takeki Myoren
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755–8505, Japan
| | - Shigehiko Nishimura
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755–8505, Japan
| | - Takayoshi Kato
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755–8505, Japan
| | - Akihiro Hino
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755–8505, Japan
| | - Tetsuro Oda
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755–8505, Japan
| | - Shinichi Okuda
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755–8505, Japan
| | - Takeshi Yamamoto
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755–8505, Japan
| | - Masafumi Yano
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755–8505, Japan
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16
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Fukumitsu S, Villareal MO, Aida K, Hino A, Hori N, Isoda H, Naito Y. Maslinic acid in olive fruit alleviates mild knee joint pain and improves quality of life by promoting weight loss in the elderly. J Clin Biochem Nutr 2016; 59:220-225. [PMID: 27895390 PMCID: PMC5110940 DOI: 10.3164/jcbn.16-40] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Accepted: 06/06/2016] [Indexed: 12/18/2022] Open
Abstract
Consumption of olives (Olea europaea L.) is associated with a low incidence of inflammation-related diseases. Olive fruit is rich in bioactive pentacyclic triterpenoids, mainly maslinic acid. This study, a randomized, double-blind, and placebo-controlled trial, examined the effects of an orally administered maslinic acid supplement, olive fruit extract, on 20 middle-aged and elderly volunteers with mild knee joint pain. Each subject (58 ± 7 years) received either olive fruit extract, containing 50 mg maslinic acid (n = 12), or placebo (n = 8) daily for 12 weeks and evaluated for pain and physical functions as primary outcome measures. Secondary outcome measures included body composition and inflammatory biomarkers in serum. Although both groups exhibited improved pain visual analogue scale score and quality of life after supplementation, symptoms were better in the maslinic acid group than in the placebo group. After 12 weeks, maslinic acid group exhibited significant decrease in body weight and body mass index suggesting that maslinic acid affected the weight of volunteers with mild knee joint pain. Therefore, olive products containing maslinic acid may be useful as a new preventive and therapeutic food ingredient for arthritic diseases. Since this clinical study is a preliminary study, it was not registered in a publicly accessible database.
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Affiliation(s)
- Satoshi Fukumitsu
- Nippon Flour Mills Co., Ltd., Central Laboratory, 5-1-3 Atsugi, Kanagawa 243-0041, Japan
| | - Myra O Villareal
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan; Alliance for Research on North Africa (ARENA), University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Kazuhiko Aida
- Nippon Flour Mills Co., Ltd., Central Laboratory, 5-1-3 Atsugi, Kanagawa 243-0041, Japan
| | - Akihiro Hino
- Nippon Flour Mills Co., Ltd., Central Laboratory, 5-1-3 Atsugi, Kanagawa 243-0041, Japan
| | | | - Hiroko Isoda
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan; Alliance for Research on North Africa (ARENA), University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yuji Naito
- Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto, Japan
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Suetomi T, Tamitani M, Hino A, Miyazaki Y, Ono M, Mochizuki M, Oda T, Kobayashi S, Yamamoto T, Yano M. Tolvaptan Retains Proportion of Body Fluid Compartments during Treatment of Decompensated Heart Failure: Two Case Reports. J Card Fail 2015. [DOI: 10.1016/j.cardfail.2015.08.335] [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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18
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Fujiwara K, Koyama K, Suga K, Ikemura M, Saito Y, Hino A, Iwanari H, Kusano-Arai O, Mitsui K, Kasahara H, Fukayama M, Kodama T, Hamakubo T, Momose T. 90Y-Labeled Anti-ROBO1 Monoclonal Antibody Exhibits Antitumor Activity against Small Cell Lung Cancer Xenografts. PLoS One 2015; 10:e0125468. [PMID: 26017283 PMCID: PMC4446100 DOI: 10.1371/journal.pone.0125468] [Citation(s) in RCA: 18] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Accepted: 03/24/2015] [Indexed: 12/27/2022] Open
Abstract
INTRODUCTION ROBO1 is a membrane protein that contributes to tumor metastasis and angiogenesis. We previously reported that 90Y-labeled anti-ROBO1 monoclonal antibody (90Y-anti-ROBO1 IgG) showed an antitumor effect against ROBO1-positive tumors. In this study, we performed a biodistribution study and radioimmunotherapy (RIT) against ROBO1-positive small cell lung cancer (SCLC) models. METHODS For the biodistribution study, 111In-labeled anti-ROBO1 monoclonal antibody (111In-anti-ROBO1 IgG) was injected into ROBO1-positive SCLC xenograft mice via the tail vein. To evaluate antitumor effects, an RIT study was performed, and SCLC xenograft mice were treated with 90Y-anti-ROBO1 IgG. Tumor volume and body weight were periodically measured throughout the experiments. The tumors and organs of mice were then collected, and a pathological analysis was carried out. RESULTS As a result of the biodistribution study, we observed tumor uptake of 111In-anti-ROBO1 IgG. The liver, kidney, spleen, and lung showed comparably high accumulation of 111In-labeled anti-ROBO1. In the RIT study, 90Y-anti-ROBO1 IgG significantly reduced tumor volume compared with baseline. Pathological analyses of tumors revealed coagulation necrosis and fatal degeneration of tumor cells, significant reduction in the number of Ki-67-positive cells, and an increase in the number of apoptotic cells. A transient reduction of hematopoietic cells was observed in the spleen, sternum, and femur. CONCLUSIONS These results suggest that RIT with 90Y-anti-ROBO1 IgG is a promising treatment for ROBO1-positive SCLC.
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Affiliation(s)
- Kentaro Fujiwara
- Department of Radiology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Keitaro Koyama
- Department of Radiology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Kosuke Suga
- SANKYO LABO SERVICE Co., Ltd., Edogawaku, Tokyo, Japan
| | - Masako Ikemura
- Department of Pathology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | | | - Akihiro Hino
- FUJIFILM RI Pharma Co., Ltd., SAMMU-CITY, CHIBA, Japan
| | - Hiroko Iwanari
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, Meguro-ku, Tokyo, Japan
| | - Osamu Kusano-Arai
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, Meguro-ku, Tokyo, Japan
| | - Kenichi Mitsui
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, Meguro-ku, Tokyo, Japan
| | | | - Masashi Fukayama
- Department of Pathology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Tatsuhiko Kodama
- Department of Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, Meguro-ku, Tokyo, Japan
| | - Takao Hamakubo
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, Meguro-ku, Tokyo, Japan
| | - Toshimitsu Momose
- Department of Radiology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
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Kobayashi S, Susa T, Ishiguchi H, Myoren T, Murakami W, Kato T, Fukuda M, Hino A, Suetomi T, Ono M, Uchinoumi H, Tateishi H, Mochizuki M, Oda T, Okuda S, Doi M, Yamamoto T, Yano M. A low-dose β1-blocker in combination with milrinone improves intracellular Ca2+ handling in failing cardiomyocytes by inhibition of milrinone-induced diastolic Ca2+ leakage from the sarcoplasmic reticulum. PLoS One 2015; 10:e0114314. [PMID: 25614983 PMCID: PMC4304815 DOI: 10.1371/journal.pone.0114314] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 11/05/2014] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVES The purpose of this study was to investigate whether adding a low-dose β1-blocker to milrinone improves cardiac function in failing cardiomyocytes and the underlying cardioprotective mechanism. BACKGROUND The molecular mechanism underlying how the combination of low-dose β1-blocker and milrinone affects intracellular Ca(2+) handling in heart failure remains unclear. METHODS We investigated the effect of milrinone plus landiolol on intracellular Ca(2+) transient (CaT), cell shortening (CS), the frequency of diastolic Ca(2+) sparks (CaSF), and sarcoplasmic reticulum Ca(2+) concentration ({Ca(2+)}SR) in normal and failing canine cardiomyocytes and used immunoblotting to determine the phosphorylation level of ryanodine receptor (RyR2) and phospholamban (PLB). RESULTS In failing cardiomyocytes, CaSF significantly increased, and peak CaT and CS markedly decreased compared with normal myocytes. Administration of milrinone alone slightly increased peak CaT and CS, while CaSF greatly increased with a slight increase in {Ca(2+)}SR. Co-administration of β1-blocker landiolol to failing cardiomyocytes at a dose that does not inhibit cardiomyocyte function significantly decreased CaSF with a further increase in {Ca(2+)}SR, and peak CaT and CS improved compared with milrinone alone. Landiolol suppressed the hyperphosphorylation of RyR2 (Ser2808) in failing cardiomyocytes but had no effect on levels of phosphorylated PLB (Ser16 and Thr17). Low-dose landiolol significantly inhibited the alternans of CaT and CS under a fixed pacing rate (0.5 Hz) in failing cardiomyocytes. CONCLUSION A low-dose β1-blocker in combination with milrinone improved cardiac function in failing cardiomyocytes, apparently by inhibiting the phosphorylation of RyR2, not PLB, and subsequent diastolic Ca(2+) leak.
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Affiliation(s)
- Shigeki Kobayashi
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
- * E-mail:
| | - Takehisa Susa
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Hironori Ishiguchi
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Takeki Myoren
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Wakako Murakami
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Takayoshi Kato
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Masakazu Fukuda
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Akihiro Hino
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Takeshi Suetomi
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Makoto Ono
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Hitoshi Uchinoumi
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Hiroki Tateishi
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Mamoru Mochizuki
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Tetsuro Oda
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Shinichi Okuda
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Masahiro Doi
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Takeshi Yamamoto
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Masafumi Yano
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
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Inoue A, Mafune K, Nakagawa Y, Tsutsumi Y, Hino A, Miyazaki Y, Yanagida K, Tanaka N, Hori C, Masuda K, Hiro H. P-33 * JOB STRAIN, SOCIAL SUPPORT AT WORK, AND SMOKING RELAPSE AMONG JAPANESE MALE EMPLOYEES: A THREE-YEAR PROSPECTIVE COHORT STUDY. Alcohol Alcohol 2014. [DOI: 10.1093/alcalc/agu054.33] [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: 11/13/2022] Open
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Miura H, Kusakabe Y, Hashido K, Hino A, Ooki M, Harada S. The glossopharyngeal nerve controls epithelial expression of Sprr2a and Krt13 around taste buds in the circumvallate papilla. Neurosci Lett 2014; 580:147-52. [PMID: 25123441 DOI: 10.1016/j.neulet.2014.08.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 07/29/2014] [Accepted: 08/01/2014] [Indexed: 12/31/2022]
Abstract
Tastants reach the tip of taste bud cells through taste pores which are openings in the epithelium. We found Sprr2a is selectively expressed in the upper layer of the epithelium surrounding taste buds in the circumvallate papilla (CV) where the epithelium is organized into taste pores. Sprr2a is a member of a small proline-rich protein family, which is suggested to be involved in the restitution/migration phase of epithelial wound healing. The expression of Sprr2a was restricted to the upper layer and largely segregated with Ptch1 expression that is restricted to the basal side of the epithelium around the taste buds. Denervation resulted in the gradual loss of Sprr2a-expressing cells over 10 days similarly to that of taste bud cells which is in contrast to the rapid loss of Ptch1 expression. We also found that denervation caused an increase of Keratin (Krt)13 expression around taste buds that corresponded with the disappearance of Sprr2a and Ptch1 expression. Taste buds were surrounded by Krt13-negative cells in the CV in control mice. However, at 6 days post-denervation, taste buds were tightly surrounded by Krt13-positive cells. During taste bud development, taste bud cells emerged together with Krt13-negtive cells, and Sprr2a expression was increased along with the progress of taste bud development. These results demonstrate that regional gene expression surrounding taste buds is associated with taste bud formation and controlled by the innervating taste nerve.
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Affiliation(s)
- Hirohito Miura
- Department of Oral Physiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima-shi, Kagoshima 890-8544, Japan.
| | - Yuko Kusakabe
- National Food Research Institute, 2-1-12 Kannondai, Tsukuba-shi, Ibaraki 305-8642, Japan
| | - Kento Hashido
- National Food Research Institute, 2-1-12 Kannondai, Tsukuba-shi, Ibaraki 305-8642, Japan
| | - Akihiro Hino
- National Food Research Institute, 2-1-12 Kannondai, Tsukuba-shi, Ibaraki 305-8642, Japan
| | - Makoto Ooki
- Department of Oral Physiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima-shi, Kagoshima 890-8544, Japan
| | - Shuitsu Harada
- Department of Oral Physiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima-shi, Kagoshima 890-8544, Japan
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Fujiwara K, Koyama K, Suga K, Ikemura M, Saito Y, Hino A, Iwanari H, Kusano-Arai O, Mitsui K, Kasahara H, Fukayama M, Kodama T, Hamakubo T, Momose T. A (90)Y-labelled anti-ROBO1 monoclonal antibody exhibits antitumour activity against hepatocellular carcinoma xenografts during ROBO1-targeted radioimmunotherapy. EJNMMI Res 2014; 4:29. [PMID: 25006547 PMCID: PMC4077627 DOI: 10.1186/s13550-014-0029-3] [Citation(s) in RCA: 17] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 05/15/2014] [Indexed: 01/19/2023] Open
Abstract
Background ROBO1 is a membrane protein that functions in axon guidance. ROBO1 contributes to tumour metastasis and angiogenesis and may have potential as a target protein of immunotherapy because ROBO1 is specifically expressed at high levels in hepatocellular carcinoma. In this study, we examined biodistribution and radioimmunotherapy (RIT) using a radioisotope-labelled anti-ROBO1 monoclonal antibody (MAb) against hepatocellular carcinoma models. Methods ROBO1-positive HepG2 human hepatocellular carcinoma xenograft nude mice were used in this study. We conjugated anti-ROBO1 MAb with 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA), and the conjugates were labelled with 111In and 90Y. To study biodistribution, the 111In-DOTA-anti-ROBO1 MAb was injected into HepG2 xenograft mice via the tail vein. To evaluate any antitumour effect, a RIT study was performed, and the 90Y-DOTA-anti-ROBO1 MAb was injected via the tail vein. Tumour volume, mouse weight, and blood cell count were periodically measured throughout the experiments. The tumours and organs of mice were collected, and a histopathological analysis was carried out. Results The tumour uptake of 111In-anti-ROBO1 MAb in HepG2 xenograft mice was 15.0% ± 0.69% injected dose per gram at 48 h after injection. Immunotherapy with cold-anti-ROBO1 MAb (70 μg) did not cause a significant antitumour effect. RIT with 6.7 MBq of 90Y-anti-ROBO1 MAb caused significant tumour growth suppression. Transient body weight loss and bone-marrow suppression were observed. Histopathological analyses of tumours revealed the fatal degeneration of tumour cells, significant reduction of the Ki-67 index, and an increase of the apoptosis index. Normal organs showed no significant injury, but a transient reduction of hematopoietic cells was observed in the spleen and in the sternal bone marrow. Conclusions These results suggest that RIT with 90Y-anti-ROBO1 MAb is a promising treatment for ROBO1-positive hepatocellular carcinoma.
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Affiliation(s)
- Kentaro Fujiwara
- Department of Radiology, Graduate School of Medicine, The University of Tokyo, 3-1, Hongo 7-Chome, Bunkyo-ku 113-8655, Tokyo, Japan
| | - Keitaro Koyama
- Department of Radiology, Graduate School of Medicine, The University of Tokyo, 3-1, Hongo 7-Chome, Bunkyo-ku 113-8655, Tokyo, Japan
| | - Kosuke Suga
- SANKYO LABO SERVICE Co., Ltd., 2-13-16, Nishiichinoe, Edogawaku 132-0023, Tokyo, Japan
| | - Masako Ikemura
- Department of Pathology, Graduate School of Medicine, The University of Tokyo, 3-1, Hongo 7-Chome, Bunkyo-ku 113-8655, Tokyo, Japan
| | - Yasutaka Saito
- FUJIFILM RI Pharma Co., Ltd., 453-1, Shimo-Okura, Matsuo-Machi, Sammu-City 289-1592, Chiba, Japan
| | - Akihiro Hino
- FUJIFILM RI Pharma Co., Ltd., 453-1, Shimo-Okura, Matsuo-Machi, Sammu-City 289-1592, Chiba, Japan
| | - Hiroko Iwanari
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku 153-8904, Tokyo, Japan
| | - Osamu Kusano-Arai
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku 153-8904, Tokyo, Japan ; Institute of Immunology Co., Ltd., 1-1-1 Koraku, Bunkyo 112-0004, Tokyo, Japan
| | - Kenichi Mitsui
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku 153-8904, Tokyo, Japan
| | - Hiroyuki Kasahara
- FUJIFILM RI Pharma Co., Ltd., 453-1, Shimo-Okura, Matsuo-Machi, Sammu-City 289-1592, Chiba, Japan
| | - Masashi Fukayama
- Department of Pathology, Graduate School of Medicine, The University of Tokyo, 3-1, Hongo 7-Chome, Bunkyo-ku 113-8655, Tokyo, Japan
| | - Tatsuhiko Kodama
- Department of Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku 153-8904, Tokyo, Japan
| | - Takao Hamakubo
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku 153-8904, Tokyo, Japan
| | - Toshimitsu Momose
- Department of Radiology, Graduate School of Medicine, The University of Tokyo, 3-1, Hongo 7-Chome, Bunkyo-ku 113-8655, Tokyo, Japan
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Fukuda M, Yamamoto T, Nishimura S, Kato T, Murakami W, Hino A, Ono M, Tateishi H, Oda T, Okuda S, Kobayashi S, Koseki N, Kyushiki H, Yano M. Enhanced binding of calmodulin to RyR2 corrects arrhythmogenic channel disorder in CPVT-associated myocytes. Biochem Biophys Res Commun 2014; 448:1-7. [DOI: 10.1016/j.bbrc.2014.03.152] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Accepted: 03/31/2014] [Indexed: 11/29/2022]
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Okuda S, Fukuda M, Hino A, Kato T, Doi M, Kobayashi S, Yamamoto T, Matsuzaki M, Yano M. Dantrolene inhibits aberrant Ca2+ release by stabilizing inter-domain interactions within the ryanodine receptor in cardiac troponin T-related familial hypertrophic cardiomyopathy. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.p5026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ito K, Kando N, Hino A. Quantitative evaluation of the symptoms provoked during the oral food challenge using the Anaphylaxis Scoring Aichi (ASCA). Clin Transl Allergy 2013. [PMCID: PMC3723877 DOI: 10.1186/2045-7022-3-s3-p105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Watanabe J, Oki T, Takebayashi J, Yamasaki K, Takano-Ishikawa Y, Hino A, Yasui A. Method validation by interlaboratory studies of improved hydrophilic oxygen radical absorbance capacity methods for the determination of antioxidant capacities of antioxidant solutions and food extracts. ANAL SCI 2012; 28:159-65. [PMID: 22322809 DOI: 10.2116/analsci.28.159] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Hydrophilic oxygen radical absorbance capacity (H-ORAC) is a method for evaluating antioxidant capacities of solutions of hydrophilic compounds. In this study, we improved the original method for H-ORAC determination, and evaluated the precision of the two improved methods (methods A and B) by interlaboratory studies using 5 antioxidant solutions and 5 food extracts as test samples. An interlaboratory study of method A, in accordance with the harmonized protocol, demonstrated satisfactory performance (intermediate precision relative standard deviations (RSD(int)) ranging from 4.6 to 18.8%; the reproducibility relative standard deviations (RSD(R)) ranging from 7.0 to 21.1%, and the HorRat values ranging from 0.40 to 1.93). However, methodological problems remained, and a further improved method, method B, was thus developed. An interlaboratory study of method B by 5 participating laboratories showed better intermediate precision and reproducibility (RSD(int) and RSD(R) ranging from 1.8 to 9.4%, and from 4.4 to 13.8%, respectively), and all HorRat values for the test samples were less than 1.3, suggesting good performance for the H-ORAC measurement.
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Affiliation(s)
- Jun Watanabe
- National Food Research Institute, National Agriculture and Food Research Organization, 2-1-12 Kannondai, Tsukuba, Ibaraki 305–8642, Japan.
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Hino A, Yano M, Kato T, Fukuda M, Suetomi T, Ono M, Murakami W, Susa T, Okuda S, Doi M, Kobayashi S, Yamamoto T, Koseki N, Kyushiki H, Ikemoto N, Matsuzaki M. Enhanced binding of calmodulin to the ryanodine receptor corrects contractile dysfunction in failing hearts. Cardiovasc Res 2012; 96:433-43. [PMID: 22893680 DOI: 10.1093/cvr/cvs271] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
AIMS The channel function of the cardiac ryanodine receptor (RyR2) is modulated by calmodulin (CaM). However, the involvement of CaM in aberrant Ca(2+) release in diseased hearts remains unclear. Here, we investigated the pathogenic role of defective CaM binding to the RyR2 in the channel dysfunction associated with heart failure. METHODS AND RESULTS The involvement of CaM in aberrant Ca(2+) release was assessed in normal and pacing-induced failing canine hearts. The apparent affinity of CaM for RyR2 was considerably lower in failing sarcoplasmic reticulum (SR) compared with normal SR. Thus, the amount of CaM bound to RyR2 was markedly decreased in failing myocytes. Expression of the CaM isoform Gly-Ser-His-CaM (GSH-CaM), which has much higher binding affinity than wild-type CaM for RyR1, restored normal CaM binding to RyR2 in both SR and myocytes of failing hearts. The Ca(2+) spark frequency (SpF) was markedly higher and the SR Ca(2+) content was lower in failing myocytes compared with normal myocytes. The incorporation of GSH-CaM into the failing myocytes corrected the aberrant SpF and SR Ca(2+) content to normal levels. CONCLUSION Reduced CaM binding to RyR2 seems to play a critical role in the pathogenesis of aberrant Ca(2+) release in failing hearts. Correction of the reduced CaM binding to RyR2 stabilizes the RyR2 channel function and thereby restores normal Ca(2+) handling and contractile function to failing hearts.
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Affiliation(s)
- Akihiro Hino
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan
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Nao T, Suetomi T, Yoshimura M, Hino A, Oda T, Nakashima T, Shiraishi K, Nakashima T, Nakamura T, Nishimura S, Miura T, Matsuzaki M. 3 DIMENSIONAL OPTICAL COHERENCE TOMOGRAPHY ASSESSMENT OF STRUT COVERAGE AND INTRALUMINAL MICROSTRUCTURE AFTER EVEROLIMUS ELUTING STENT IMPLANTATION. J Am Coll Cardiol 2012. [DOI: 10.1016/s0735-1097(12)60163-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Hino A, Yano M, Katoh T, Fukuda M, Suetomi T, Doi M, Okuda S, Kobayashi S, Yamamoto T, Matsuzaki M. Enhancement of Calmodulin Binding to Cardiac Ryanodine Receptor Corrects the Defective Channel Gating in Failing Hearts. J Card Fail 2011. [DOI: 10.1016/j.cardfail.2011.06.582] [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: 12/01/2022]
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Suetomi T, Yano M, Uchinoumi H, Fukuda M, Hino A, Ono M, Xu X, Tateishi H, Okuda S, Doi M, Kobayashi S, Ikeda Y, Yamamoto T, Ikemoto N, Matsuzaki M. Mutation-linked defective interdomain interactions within ryanodine receptor cause aberrant Ca²⁺release leading to catecholaminergic polymorphic ventricular tachycardia. Circulation 2011; 124:682-94. [PMID: 21768539 DOI: 10.1161/circulationaha.111.023259] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The molecular mechanism by which catecholaminergic polymorphic ventricular tachycardia is induced by single amino acid mutations within the cardiac ryanodine receptor (RyR2) remains elusive. In the present study, we investigated mutation-induced conformational defects of RyR2 using a knockin mouse model expressing the human catecholaminergic polymorphic ventricular tachycardia-associated RyR2 mutant (S2246L; serine to leucine mutation at the residue 2246). METHODS AND RESULTS All knockin mice we examined produced ventricular tachycardia after exercise on a treadmill. cAMP-dependent increase in the frequency of Ca²⁺ sparks was more pronounced in saponin-permeabilized knockin cardiomyocytes than in wild-type cardiomyocytes. Site-directed fluorescent labeling and quartz microbalance assays of the specific binding of DP2246 (a peptide corresponding to the 2232 to 2266 region: the 2246 domain) showed that DP2246 binds with the K201-binding sequence of RyR2 (1741 to 2270). Introduction of S2246L mutation into the DP2246 increased the affinity of peptide binding. Fluorescence quench assays of interdomain interactions within RyR2 showed that tight interaction of the 2246 domain/K201-binding domain is coupled with domain unzipping of the N-terminal (1 to 600)/central (2000 to 2500) domain pair in an allosteric manner. Dantrolene corrected the mutation-caused domain unzipping of the domain switch and stopped the exercise-induced ventricular tachycardia. CONCLUSIONS The catecholaminergic polymorphic ventricular tachycardia-linked mutation of RyR2, S2246L, causes an abnormally tight local subdomain-subdomain interaction within the central domain involving the mutation site, which induces defective interaction between the N-terminal and central domains. This results in an erroneous activation of Ca²⁺ channel in a diastolic state reflecting on the increased Ca²⁺ spark frequency, which then leads to lethal arrhythmia.
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Affiliation(s)
- Takeshi Suetomi
- Department of Medicine and Clinical Science, Division of Cardiology, Yamaguchi University Graduate School of Medicine, Yamaguchi, 755-8505, Japan
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Mano J, Yanaka Y, Ikezu Y, Onishi M, Futo S, Minegishi Y, Ninomiya K, Yotsuyanagi Y, Spiegelhalter F, Akiyama H, Teshima R, Hino A, Naito S, Koiwa T, Takabatake R, Furui S, Kitta K. Practicable group testing method to evaluate weight/weight GMO content in maize grains. J Agric Food Chem 2011; 59:6856-6863. [PMID: 21604714 DOI: 10.1021/jf200212v] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Because of the increasing use of maize hybrids with genetically modified (GM) stacked events, the established and commonly used bulk sample methods for PCR quantification of GM maize in non-GM maize are prone to overestimate the GM organism (GMO) content, compared to the actual weight/weight percentage of GM maize in the grain sample. As an alternative method, we designed and assessed a group testing strategy in which the GMO content is statistically evaluated based on qualitative analyses of multiple small pools, consisting of 20 maize kernels each. This approach enables the GMO content evaluation on a weight/weight basis, irrespective of the presence of stacked-event kernels. To enhance the method's user-friendliness in routine application, we devised an easy-to-use PCR-based qualitative analytical method comprising a sample preparation step in which 20 maize kernels are ground in a lysis buffer and a subsequent PCR assay in which the lysate is directly used as a DNA template. This method was validated in a multilaboratory collaborative trial.
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Affiliation(s)
- Junichi Mano
- National Food Research Institute, National Agriculture and Food Research Organization, Kannondai, Tsukuba, Ibaraki 305-8642, Japan
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Suzuki K, Satake M, Suwada J, Oshikiri S, Ashino H, Dozono H, Hino A, Kasahara H, Minamizawa T. Synthesis and evaluation of a novel 68Ga-chelate-conjugated bisphosphonate as a bone-seeking agent for PET imaging. Nucl Med Biol 2011; 38:1011-8. [PMID: 21982572 DOI: 10.1016/j.nucmedbio.2011.02.015] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Revised: 02/16/2011] [Accepted: 02/27/2011] [Indexed: 10/18/2022]
Abstract
INTRODUCTION (68)Ga is a positron-emitting nuclide that has significant imaging potential given that, unlike cyclotron-produced (18)F, the isotope can be produced on-site utilizing a (68)Ge/(68)Ga generator. We recently synthesized a novel bone-seeking agent by coupling a bisphosphonate with the (68)Ga chelator 1,4,7-triazacyclononane-1,4,7-triacetic acid (NOTA). This study presents a first report on the potential of this (68)Ga bone-seeking radiopharmaceutical in the detection of bone metastases. METHODS 4-Amino-1-hydroxybutylidene-1,1-bisphosphonate was conjugated with 2-[4,7-di(carboxymethyl)-1,4,7-triazonan-1-yl]pentanedioic acid, yielding 2-[4,7-di(carboxymethyl)-1,4,7-triazonan-1-yl]-5-[(4-hydroxy-4,4-diphosphonobutyl)amino]-5-oxopentanoic acid (NOTA-BP). (68)Ga-labeled NOTA-BP ([(68)Ga]NOTA-BP) was prepared by complexation of NOTA-BP with [(68)Ga] gallium chloride and evaluated in in vitro experiments, biodistribution experiments and micro-positron emission tomography (PET) imaging experiments. RESULTS The labeling of NOTA-BP with (68)Ga was completed by heating for 10 min. [(68)Ga]NOTA-BP was determined to have a radiochemical purity of over 95%, a high affinity for hydroxyapatite and a high stability in plasma. In in vivo biodistribution experiments, [(68)Ga]NOTA-BP demonstrated high bone uptake potential. Compared with (99m)Tc-labeled methylene diphosphonate ([(99m)Tc]MDP) and [(18)F]fluoride, [(68)Ga]NOTA-BP exhibited faster blood clearance and a higher bone-to-blood ratio. In addition, mouse model bone metastasis was detected by micro-PET imaging at 1 h postinjection of [(68)Ga]NOTA-BP. CONCLUSION We have developed a novel (68)Ga-radiolabeled bone-seeking agent. This [(68)Ga]NOTA-BP complex was found to have a high bone affinity and rapid blood clearance, and may thus prove to be useful as a bone-seeking agent for clinical PET.
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Affiliation(s)
- Kentaro Suzuki
- Research Department, Fujifilm RI Pharma Co., Ltd., Sammu-City, Chiba, 289-1592 Japan.
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Kodama T, Kasahara M, Minegishi Y, Futo S, Sawada C, Watai M, Akiyama H, Teshima R, Kurosawa Y, Furui S, Hino A, Kitta K. Qualitative PCR method for Roundup Ready soybean: interlaboratory study. J AOAC Int 2011; 94:224-31. [PMID: 21391499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Quantitative and qualitative methods based on PCR have been developed for genetically modified organisms (GMO). Interlaboratory studies were previously conducted for GMO quantitative methods; in this study, an interlaboratory study was conducted for a qualitative method for a GM soybean, Roundup Ready soy (RR soy), with primer pairs designed for the quantitative method of RR soy studied previously. Fourteen laboratories in Japan participated. Each participant extracted DNA from 1.0 g each of the soy samples containing 0, 0.05, and 0.10% of RR soy, and performed PCR with primer pairs for an internal control gene (Le1) and RR soy followed by agarose gel electrophoresis. The PCR product amplified in this PCR system for Le1 was detected from all samples. The sensitivity, specificity, and false-negative and false-positive rates of the method were obtained from the results of RR soy detection. False-negative rates at the level of 0.05 and 0.10% of the RR soy samples were 6.0 and 2.3%, respectively, revealing that the LOD of the method was somewhat below 0.10%. The current study demonstrated that the qualitative method would be practical for monitoring the labeling system of GM soy in kernel lots.
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Affiliation(s)
- Takashi Kodama
- Food and Agricultural Materials Inspection Center, 2-1 Shintoshin, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan
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Ando M, Yamamoto T, Hino A, Sato T, Nakamura Y, Matsuzaki M. Norepinephrine spillover during exercise as a novel parameter to evaluate the severity of heart failure. J Nucl Cardiol 2010; 17:868-73. [PMID: 20503121 DOI: 10.1007/s12350-010-9241-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 12/09/2009] [Accepted: 04/15/2010] [Indexed: 01/08/2023]
Abstract
BACKGROUND The washout rate (WR) of (123)I-metaiodobenzylguanidine (MIBG) is now widely used for assessing the severity of heart failure. Although the WR of MIBG is usually measured at rest, the assessment of WR of MIBG during exercise might have a different clinical relevance. In this study, we measured the WR rate of MIBG during low-grade exercise and studied the clinical importance of this novel index. METHODS Twenty-four patients with dilated cardiomyopathy (DCM) were enrolled in this study. Planar images were obtained 20 minutes after MIBG injection (first image) and after 270 minutes (second image); the third image was obtained after 15 minutes of low-grade (10 W) bicycle ergometer exercise (300 minutes after MIBG injection). The decay of the specific counts was calculated from the first two images. The estimated third counts were calculated from the resting decay and were compared with the actual third counts. RESULTS In the receiver operating characteristic (ROC) curve analysis, we set a 10% decrease from the estimated counts as a cut-off value for severe heart failure (New York Heart Association [NYHA] Class IIm or worse). In 15 patients, the actual third count value was within 10% of the estimated count (N-group). In nine patients, the WR during exercise was high, and the actual third count values showed more than a 10% decrease from the estimated count value (H-group). In the H-group, 78% of the patients were in NYHA class IIm or III. In contrast, in the N-group, no patient had NYHA class III, and only 20% of the patients were in class IIm. The brain natriuretic peptide (BNP) level was significantly higher in the H-group than in the N-group (525 ± 263 pg/mL vs 176 ± 144 pg/mL; P < .01). No significant differences were observed in heart/mediastinal (H/M) activity ratio, the regular WR, and left ventricular ejection fraction values between the two groups. CONCLUSIONS The WR of MIBG during exercise may be an independent prediction variable, with a clinical relevance different from that of the WR at rest. This measurement could be used as a new index for assessing the severity of heart failure.
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Affiliation(s)
- Miyuki Ando
- Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube 755-8505, Japan
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35
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Hino A, Yano M, Suetomi T, Ono M, Xu X, Uchinoumi H, Doi M, Okuda S, Kobayashi S, Yamamoto T. Defective Calmodulin Binding to RyR2 Renders the Ca2+ Release Channel Leaky in Failing Hearts. J Card Fail 2010. [DOI: 10.1016/j.cardfail.2010.07.195] [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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36
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Ono M, Yano M, Hino A, Suetomi T, Xu X, Susa T, Uchinoumi H, Tateishi H, Oda T, Okuda S, Doi M, Kobayashi S, Yamamoto T, Koseki N, Kyushiki H, Ikemoto N, Matsuzaki M. Dissociation of calmodulin from cardiac ryanodine receptor causes aberrant Ca(2+) release in heart failure. Cardiovasc Res 2010; 87:609-17. [PMID: 20388639 DOI: 10.1093/cvr/cvq108] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
AIMS Calmodulin (CaM) is well known to modulate the channel function of the cardiac ryanodine receptor (RyR2). However, the possible role of CaM on the aberrant Ca(2+) release in diseased hearts remains unclear. In this study, we investigated the state of RyR2-bound CaM and channel dysfunctions in pacing-induced failing hearts. METHODS AND RESULTS The characteristics of CaM binding to RyR2 and the role of CaM on the aberrant Ca(2+) release were assessed in normal and failing canine hearts. The affinity of CaM binding to RyR2 was lower in failing sarcoplasmic reticulum (SR) than in normal SR. Addition of FK506, which dissociates FKBP12.6 from RyR2, to normal SR reduced the CaM-binding affinity. Dantrolene restored a normal level of the CaM-binding affinity in either FK506-treated (normal) SR or failing SR, suggesting that the defective inter-domain interaction between the N-terminal domain and the central domain of RyR2 (the therapeutic target of dantrolene) is involved in the reduction of the CaM-binding affinity in failing hearts. In saponin-permeabilized cardiomyocytes, the frequency of spontaneous Ca(2+) sparks was much more increased in failing cardiomyocytes than in normal cardiomyocytes, whereas the addition of a high concentration of CaM attenuated the aberrant increase of Ca(2+) sparks. CONCLUSION The defective inter-domain interaction between N-terminal and central domains within RyR2 reduces the binding affinity of CaM to RyR2, thereby causing the spontaneous Ca(2+) release events in failing hearts. Correction of the defective CaM binding may be a new strategy to protect against the aberrant Ca(2+) release in heart failure.
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Affiliation(s)
- Makoto Ono
- Department of Medicine and Clinical Science, Division of Cardiology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan
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37
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Abstract
Inositol 1,4,5-triphosphate–mediated calcium (IP3-Ca2+) signal cascade is an essential process in sweet, bitter, and umami taste signal transduction. Although the main components of this cascade have been identified, the candidate regulators of them in taste tissues are still unclear. In an effort to identify genes involved in taste signal transduction, we found that a gene encoding lymphoid-restricted membrane protein (Lrmp/Jaw1) was expressed in mouse taste tissues. Here we report that Lrmp/Jaw1 is specifically expressed in sweet, bitter, and umami taste receptor–expressing cells of mouse circumvallate, foliate, and fungiform papillae. In addition to this specific expression patterns, we found that Lrmp/Jaw1 is associated with type III IP3 receptor (IP3R3) via its coiled-coil domain in the COS7 heterologous expression system. These results raise the possibility that Lrmp/Jaw1 interacts with IP3R3 in taste cells and suggest an important role for Lrmp/Jaw1 in the IP3-Ca2+ signal cascade in sweet, bitter, and umami taste signal transduction.
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Affiliation(s)
- Yoichiro Shindo
- Sensory and Cognitive Food Sciences, National Food Research Institute, 2-1-12 Kannondai, Tsukuba-shi, Ibaraki 305-8642, Japan
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38
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Xu X, Yano M, Uchinoumi H, Hino A, Suetomi T, Ono M, Tateishi H, Oda T, Okuda S, Doi M, Kobayashi S, Yamamoto T, Ikeda Y, Ikemoto N, Matsuzaki M. Defective calmodulin binding to the cardiac ryanodine receptor plays a key role in CPVT-associated channel dysfunction. Biochem Biophys Res Commun 2010; 394:660-6. [PMID: 20226167 DOI: 10.1016/j.bbrc.2010.03.046] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2010] [Accepted: 03/07/2010] [Indexed: 10/19/2022]
Abstract
Calmodulin (CaM), one of the accessory proteins of the cardiac ryanodine receptor (RyR2), is known to play a significant role in the channel regulation of the RyR2. However, the possible involvement of calmodulin in the pathogenic process of catecholaminergic polymorphic ventricular tachycardia (CPVT) has not been investigated. In this study, we investigated the state of RyR2-bound CaM and channel dysfunctions using a knock-in (KI) mouse model with CPVT-linked RyR2 mutation (R2474S). Without added effectors, the affinity of CaM binding to the RyR2 was indistinguishable between KI and WT hearts. In response to cAMP (1 micromol/L), the RyR2 phosphorylation at Ser2808 increased in both WT and KI hearts to the same extent. However, cAMP caused a significant decrease of the CaM-binding affinity in KI hearts, but the affinity was unchanged in WT. Dantrolene restored a normal level of CaM-binding affinity in the cAMP-treated KI hearts, suggesting that defective inter-domain interaction between the N-terminal domain and the central domain of the RyR2 (the target of therapeutic effect of dantrolene) is involved in the cAMP-induced reduction of the CaM-binding affinity. In saponin-permeabilized cardiomyocytes, the addition of cAMP increased the frequency of spontaneous Ca(2+) sparks to a significantly larger extent in KI cardiomyocytes than in WT cardiomyocytes, whereas the addition of a high concentration of CaM attenuated the aberrant increase of Ca(2+) sparks. In conclusion, CPVT mutation causes defective inter-domain interaction, significant reduction in the ability of CaM binding to the RyR2, spontaneous Ca(2+) leak, and then lethal arrhythmia.
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Affiliation(s)
- Xiaojuan Xu
- Department of Medicine and Clinical Science, Division of Cardiology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan
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Shimizu E, Futo S, Masubuchi T, Minegishi Y, Kasahara M, Akiyama H, Teshima R, Hino A, Mano J, Furui S, Kitta K. [Selection of suitable polypropylene tubes for DNA testing using real-time PCR]. Shokuhin Eiseigaku Zasshi 2010; 51:43-7. [PMID: 20208409 DOI: 10.3358/shokueishi.51.43] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Polypropylene microtubes (tubes) are generally used for bio-material tests in addition to PCR tests such as genetically modified organism (GMO) testings. However, the choice of suitable tubes is quite important, because it might influence the results: DNA binding and/or elution of chemical substances sometimes occurs. In this study, we established methods to select tubes with the most suitable characteristics for DNA testing.
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Affiliation(s)
- Eri Shimizu
- Fasmac Co., Ltd., 5-1-3 Midorigaoka, Atsugi, Kanagawa 243-0041, Japan
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40
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Oguchi T, Onishi M, Chikagawa Y, Kodama T, Suzuki E, Kasahara M, Akiyama H, Teshima R, Futo S, Hino A, Furui S, Kitta K. Investigation of residual DNAs in sugar from sugar beet (Beta vulgaris L.). Shokuhin Eiseigaku Zasshi 2009; 50:41-6. [PMID: 19325225 DOI: 10.3358/shokueishi.50.41] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Genetically modified (GM) sugar beets have been bred for use as food and animal feed. To evaluate the applicability of GMO analyses to beet sugar products, we investigated residual DNA in eight sorts of in-process beet sugar samples and commercial beet sugar products. Polymerase chain reaction (PCR) analyses with taxon-specific primers indicated that sugar beet DNA was degraded at an early stage of sugar processing, and no PCR amplification was detected from the investigated sugar products because of low DNA recovery and/or PCR inhibition.
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Affiliation(s)
- Taichi Oguchi
- National Agriculture and Food Research Organization, National Food Research Institute, Tsukuba, Ibaraki 3058642, Japan
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41
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Mano J, Oguchi T, Akiyama H, Teshima R, Hino A, Furui S, Kitta K. Simultaneous detection of recombinant DNA segments introduced into genetically modified crops with multiplex ligase chain reaction coupled with multiplex polymerase chain reaction. J Agric Food Chem 2009; 57:2640-6. [PMID: 19265381 DOI: 10.1021/jf803361a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We developed a multiplex polymerase chain reaction (PCR)-multiplex ligase chain reaction (LCR) (MPCR-MLCR) technique as a novel approach for the simultaneous detection of recombinant DNA segments (e.g., promoters, trait genes, and terminators) of genetically modified (GM) crops. With this technique, target DNA regions were amplified by multiplex PCR, the PCR products were then subjected to multiplex LCR as template DNAs, and the LCR products were then analyzed by polyacrylamide gel electrophoresis and subsequent fluorescent scanning. Seven recombinant DNA segments commonly introduced into some GM crop lines were selected as target DNA regions. In addition, another MPCR-MLCR system for the simultaneous detection of three endogenous DNA segments was designed as a positive control test. The specificity and sensitivity of the method were examined. The method allowed us to detect GM crops comprehensively and is expected to be utilized for efficient screening of GM crops into which any one of the seven recombinant DNA segments have been introduced, and for profiling the segments.
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Affiliation(s)
- Junichi Mano
- National Food Research Institute, 2-1-12, Kannondai, Tsukuba, Ibaraki 305-8642, Japan
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42
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Mano J, Shigemitsu N, Futo S, Akiyama H, Teshima R, Hino A, Furui S, Kitta K. Real-time PCR array as a universal platform for the detection of genetically modified crops and its application in identifying unapproved genetically modified crops in Japan. J Agric Food Chem 2009; 57:26-37. [PMID: 19072282 DOI: 10.1021/jf802551h] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We developed a novel type of real-time polymerase chain reaction (PCR) array with TaqMan chemistry as a platform for the comprehensive and semiquantitative detection of genetically modified (GM) crops. Thirty primer-probe sets for the specific detection of GM lines, recombinant DNA (r-DNA) segments, endogenous reference genes, and donor organisms were synthesized, and a 96-well PCR plate was prepared with a different primer-probe in each well as the real-time PCR array. The specificity and sensitivity of the array were evaluated. A comparative analysis with the data and publicly available information on GM crops approved in Japan allowed us to assume the possibility of unapproved GM crop contamination. Furthermore, we designed a Microsoft Excel spreadsheet application, Unapproved GMO Checker version 2.01, which helps process all the data of real-time PCR arrays for the easy assumption of unapproved GM crop contamination. The spreadsheet is available free of charge at http://cse.naro.affrc.go.jp/jmano/index.html .
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Affiliation(s)
- Junichi Mano
- National Food Research Institute, 2-1-12 Kannondai, Tsukuba, Ibaraki, Japan
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43
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Ahmed MU, Saito M, Hossain MM, Rao SR, Furui S, Hino A, Takamura Y, Takagi M, Tamiya E. Electrochemical genosensor for the rapid detection of GMO using loop-mediated isothermal amplification. Analyst 2009; 134:966-72. [DOI: 10.1039/b812569d] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Kodama T, Kuribara H, Minegishi Y, Futo S, Watai M, Sawada C, Watanabe T, Akiyama H, Maitani T, Teshima R, Furui S, Hino A, Kitta K. Evaluation of modified PCR quantitation of genetically modified maize and soybean using reference molecules: interlaboratory study. J AOAC Int 2009; 92:223-33. [PMID: 19382580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Real-time polymerase chain reaction (PCR)-based quantitative methods were previously developed and validated for genetically modified (GM) maize or soy. In this study, the quantification step of the validated methods was modified, and an interlaboratory study was conducted. The modification included the introduction of the PCR system SSIIb 3 instead of SSIIb 1 for the detection of the taxon-specific sequence of maize, as well as the adoption of colE1 as a carrier included in a reference plasmid solution as a replacement for salmon testis. The interlaboratory study was conducted with the ABI PRISM 7700 and consisted of 2 separate stages: (1) the measurement of conversion factor (Cf) value, which is the ratio of recombinant DNA (r-DNA) sequence to taxon-specific sequence in each genuine GM seed, and (2) the quantification of blind samples. Additionally, Cf values of other instruments, such as the ABI PRISM 7900 and the ABI PRISM 7000, were measured in a multilaboratory trial. After outlier laboratories were eliminated, the repeatability and reproducibility for 5.0% samples were <15.8 and 20.6%, respectively. The quantitation limits of these methods were 0.5% for Bt11, T25, and MON810, and 0.1% for GA21, Event176, and RR soy. The quantitation limits, trueness, and precision of the current modified methods were equivalent to those of the previous methods. Therefore, it was concluded that the modified methods would be a suitable replacement for the validated methods.
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Affiliation(s)
- Takashi Kodama
- Food and Agricultural Materials Inspection Center, 2-1 Shintoshin, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan
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45
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46
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Miura H, Kato H, Kusakabe Y, Tagami M, Miura-Ohnuma J, Ookura T, Shindo Y, Ninomiya Y, Hino A. Shh signaling and regulatory gene expression in mouse taste buds. Chem Senses 2008; 30 Suppl 1:i50-1. [PMID: 15738190 DOI: 10.1093/chemse/bjh108] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Hirohito Miura
- National Food Research Institute, Asahi Breweries Ltd and Kyushu University.
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47
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Shindo Y, Miura H, Carninci P, Kawai J, Hayashizaki Y, Ninomiya Y, Hino A, Kanda T, Kusakabe Y. G alpha14 is a candidate mediator of sweet/umami signal transduction in the posterior region of the mouse tongue. Biochem Biophys Res Commun 2008; 376:504-8. [PMID: 18801333 DOI: 10.1016/j.bbrc.2008.09.035] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [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: 08/27/2008] [Accepted: 09/05/2008] [Indexed: 11/19/2022]
Abstract
Gustducin, a G alpha subunit expressed in taste cells, is known as a key molecule for sweet, umami and bitter taste signal transduction. However, previous studies demonstrated that the contribution of gustducin to the sweet/umami responses in the posterior region of the tongue is less than that in the anterior region, implying the existence of another G alpha subunit mediating sweet/umami taste signal transduction. Here, we propose G alpha14, a member of G alpha q family, as the candidate mediator. G alpha14 was found in our subtracted full-length cDNA library derived from mouse circumvallate papillae (CV) and expressed in a subset of taste cells in CV and foliate papillae, but not in fungiform papillae and soft palate. G alpha14 was co-expressed with T1r3, a sweet/umami taste receptor, but not with gustducin in CV. These results suggest the important roles of G alpha14 in sweet/umami taste signal transduction in the posterior region of the tongue.
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Affiliation(s)
- Yoichiro Shindo
- Research Laboratories for Health & Gustatory Science, Asahi Breweries, Ltd., 1-1-21 Midori, Moriya, Ibaraki 302-0106, Japan
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48
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Shimizu E, Kato H, Nakagawa Y, Kodama T, Futo S, Minegishi Y, Watanabe T, Akiyama H, Teshima R, Furui S, Hino A, Kitta K. Development of a screening method for genetically modified soybean by plasmid-based quantitative competitive polymerase chain reaction. J Agric Food Chem 2008; 56:5521-7. [PMID: 18558691 DOI: 10.1021/jf073348n] [Citation(s) in RCA: 7] [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] [Indexed: 05/26/2023]
Abstract
A novel type of quantitative competitive polymerase chain reaction (QC-PCR) system for the detection and quantification of the Roundup Ready soybean (RRS) was developed. This system was designed based on the advantage of a fully validated real-time PCR method used for the quantification of RRS in Japan. A plasmid was constructed as a competitor plasmid for the detection and quantification of genetically modified soy, RRS. The plasmid contained the construct-specific sequence of RRS and the taxon-specific sequence of lectin1 (Le1), and both had 21 bp oligonucleotide insertion in the sequences. The plasmid DNA was used as a reference molecule instead of ground seeds, which enabled us to precisely and stably adjust the copy number of targets. The present study demonstrated that the novel plasmid-based QC-PCR method could be a simple and feasible alternative to the real-time PCR method used for the quantification of genetically modified organism contents.
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Affiliation(s)
- Eri Shimizu
- Fasmac Co., Ltd., 5-1-3 Midorigaoka, Atsugi, Kanagawa 243-0041, Japan
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Akiyama H, Sakata K, Kondo K, Tanaka A, Liu MS, Oguchi T, Furui S, Kitta K, Hino A, Teshima R. Individual detection of genetically modified maize varieties in non-identity-preserved maize samples. J Agric Food Chem 2008; 56:1977-1983. [PMID: 18298063 DOI: 10.1021/jf0727239] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In many countries, the labeling of grains and feed- and foodstuffs is mandatory if the genetically modified organism (GMO) content exceeds a certain level of approved GM varieties. The GMO content in a maize sample containing the combined-trait (stacked) GM maize as determined by the currently available methodology is likely to be overestimated. However, there has been little information in the literature on the mixing level and varieties of stacked GM maize in real sample grains. For the first time, the GMO content of non-identity-preserved (non-IP) maize samples imported from the United States has been successfully determined by using a previously developed individual kernel detection system coupled to a multiplex qualitative PCR method followed by multichannel capillary gel electrophoresis system analysis. To clarify the GMO content in the maize samples imported from the United States, determine how many stacked GM traits are contained therein, and which GM trait varieties frequently appeared in 2005, the GMO content (percent) on a kernel basis and the varieties of the GM kernels in the non-IP maize samples imported from the United States were investigated using the individual kernel analysis system. The average (+/-standard deviation) of the GMO contents on a kernel basis in five non-IP sample lots was determined to be 51.0+/-21.6%, the percentage of a single GM trait grains was 39%, and the percentage of the stacked GM trait grains was 12%. The MON810 grains and NK603 grains were the most frequent varieties in the single GM traits. The most frequent stacked GM traits were the MON810xNK603 grains. In addition, the present study would provide the answer and impact for the quantification of GM maize content in the GM maize kernels on labeling regulation.
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Yamamura K, Hino A. Estimation of the Proportion of Defective Units by Using Group Testing Under the Existence of a Threshold of Detection. COMMUN STAT-SIMUL C 2007. [DOI: 10.1080/03610910701539278] [Citation(s) in RCA: 10] [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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