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Takamatsu K, Toyofuku M, Okutani F, Yamazaki S, Nakayasu M, Aoki Y, Kobayashi M, Ifuku K, Yazaki K, Sugiyama A. α-Tomatine gradient across artificial roots recreates the recruitment of tomato root-associated Sphingobium. Plant Direct 2023; 7:e550. [PMID: 38116181 PMCID: PMC10728018 DOI: 10.1002/pld3.550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 10/27/2023] [Accepted: 11/15/2023] [Indexed: 12/21/2023]
Abstract
α-Tomatine is a major saponin that accumulates in tomatoes (Solanum lycopersicum). We previously reported that α-tomatine secreted from tomato roots modulates root-associated bacterial communities, particularly by enriching the abundance of Sphingobium belonging to the family Sphingomonadaceae. To further characterize the α-tomatine-mediated interactions between tomato plants and soil bacterial microbiota, we first cultivated tomato plants in pots containing different microbial inoculants originating from three field soils. Four bacterial genera, namely, Sphingobium, Bradyrhizobium, Cupriavidus, and Rhizobacter, were found to be commonly enriched in tomato root-associated bacterial communities. We constructed a pseudo-rhizosphere system using a mullite ceramic tube as an artificial root to investigate the influence of α-tomatine in modifying bacterial communities. The addition of α-tomatine from the artificial root resulted in the formation of a concentration gradient of α-tomatine that mimicked the tomato rhizosphere, and distinctive bacterial communities were observed in the soil close to the artificial root. Sphingobium was enriched according to the α-tomatine concentration gradient, whereas Bradyrhizobium, Cupriavidus, and Rhizobacter were not enriched in α-tomatine-treated soil. The tomato root-associated bacterial communities were similar to the soil bacterial communities in the vicinity of artificial root-secreting exudates; however, hierarchical cluster analysis revealed a distinction between root-associated and pseudo-rhizosphere bacterial communities. These results suggest that the pseudo-rhizosphere device at least partially creates a rhizosphere environment in which α-tomatine enhances the abundance of Sphingobium in the vicinity of the root. Enrichment of Sphingobium in the tomato rhizosphere was also apparent in publicly available microbiota data, further supporting the tight association between tomato roots and Sphingobium mediated by α-tomatine.
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Affiliation(s)
- Kyoko Takamatsu
- Research Institute for Sustainable HumanosphereKyoto UniversityUjiJapan
| | - Miwako Toyofuku
- Research Institute for Sustainable HumanosphereKyoto UniversityUjiJapan
| | - Fuki Okutani
- Research Institute for Sustainable HumanosphereKyoto UniversityUjiJapan
| | | | - Masaru Nakayasu
- Research Institute for Sustainable HumanosphereKyoto UniversityUjiJapan
| | - Yuichi Aoki
- Tohoku Medical Megabank OrganizationTohoku UniversitySendaiJapan
| | - Masaru Kobayashi
- Division of Applied Life Sciences, Graduate School of AgricultureKyoto UniversityKyotoJapan
| | - Kentaro Ifuku
- Division of Applied Life Sciences, Graduate School of AgricultureKyoto UniversityKyotoJapan
| | - Kazufumi Yazaki
- Research Institute for Sustainable HumanosphereKyoto UniversityUjiJapan
| | - Akifumi Sugiyama
- Research Institute for Sustainable HumanosphereKyoto UniversityUjiJapan
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2
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Nakayasu M, Takamatsu K, Kanai K, Masuda S, Yamazaki S, Aoki Y, Shibata A, Suda W, Shirasu K, Yazaki K, Sugiyama A. Tomato root-associated Sphingobium harbors genes for catabolizing toxic steroidal glycoalkaloids. mBio 2023; 14:e0059923. [PMID: 37772873 PMCID: PMC10653915 DOI: 10.1128/mbio.00599-23] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 08/08/2023] [Indexed: 09/30/2023] Open
Abstract
IMPORTANCE Saponins are a group of plant specialized metabolites with various bioactive properties, both for human health and soil microorganisms. Our previous works demonstrated that Sphingobium is enriched in both soils treated with a steroid-type saponin, such as tomatine, and in the tomato rhizosphere. Despite the importance of saponins in plant-microbe interactions in the rhizosphere, the genes involved in the catabolism of saponins and their aglycones (sapogenins) remain largely unknown. Here we identified several enzymes that catalyzed the degradation of steroid-type saponins in a Sphingobium isolate from tomato roots, RC1. A comparative genomic analysis of Sphingobium revealed the limited distribution of genes for saponin degradation in our saponin-degrading isolates and several other isolates, suggesting the possible involvement of the saponin degradation pathway in the root colonization of Sphingobium spp. The genes that participate in the catabolism of sapogenins could be applied to the development of new industrially valuable sapogenin molecules.
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Affiliation(s)
- Masaru Nakayasu
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto, Japan
| | - Kyoko Takamatsu
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto, Japan
| | - Keiko Kanai
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto, Japan
| | - Sachiko Masuda
- Plant Immunity Research Group, RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa, Japan
| | - Shinichi Yamazaki
- Tohoku Medical Megabank Organization, Tohoku University, Sendai, Miyagi, Japan
| | - Yuichi Aoki
- Tohoku Medical Megabank Organization, Tohoku University, Sendai, Miyagi, Japan
- Graduate School of Information Sciences, Tohoku University, Sendai, Miyagi, Japan
| | - Arisa Shibata
- Plant Immunity Research Group, RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa, Japan
| | - Wataru Suda
- Laboratory for Microbiome Sciences, RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa, Japan
| | - Ken Shirasu
- Plant Immunity Research Group, RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa, Japan
| | - Kazufumi Yazaki
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto, Japan
| | - Akifumi Sugiyama
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto, Japan
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3
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Matsuda H, Yamazaki Y, Moriyoshi E, Nakayasu M, Yamazaki S, Aoki Y, Takase H, Okazaki S, Nagano AJ, Kaga A, Yazaki K, Sugiyama A. Apoplast-Localized β-Glucosidase Elevates Isoflavone Accumulation in the Soybean Rhizosphere. Plant Cell Physiol 2023; 64:486-500. [PMID: 36718526 DOI: 10.1093/pcp/pcad012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/11/2023] [Accepted: 01/30/2023] [Indexed: 05/17/2023]
Abstract
Plant specialized metabolites (PSMs) are often stored as glycosides within cells and released from the roots with some chemical modifications. While isoflavones are known to function as symbiotic signals with rhizobia and to modulate the soybean rhizosphere microbiome, the underlying mechanisms of root-to-soil delivery are poorly understood. In addition to transporter-mediated secretion, the hydrolysis of isoflavone glycosides in the apoplast by an isoflavone conjugate-hydrolyzing β-glucosidase (ICHG) has been proposed but not yet verified. To clarify the role of ICHG in isoflavone supply to the rhizosphere, we have isolated two independent mutants defective in ICHG activity from a soybean high-density mutant library. In the root apoplastic fraction of ichg mutants, the isoflavone glycoside contents were significantly increased, while isoflavone aglycone contents were decreased, indicating that ICHG hydrolyzes isoflavone glycosides into aglycones in the root apoplast. When grown in a field, the lack of ICHG activity considerably reduced isoflavone aglycone contents in roots and the rhizosphere soil, although the transcriptomes showed no distinct differences between the ichg mutants and wild-types (WTs). Despite the change in isoflavone contents and composition of the root and rhizosphere of the mutants, root and rhizosphere bacterial communities were not distinctive from those of the WTs. Root bacterial communities and nodulation capacities of the ichg mutants did not differ from the WTs under nitrogen-deficient conditions either. Taken together, these results indicate that ICHG elevates the accumulation of isoflavones in the soybean rhizosphere but is not essential for isoflavone-mediated plant-microbe interactions.
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Affiliation(s)
- Hinako Matsuda
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, 611-0011 Japan
| | - Yumi Yamazaki
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, 611-0011 Japan
| | - Eiko Moriyoshi
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, 611-0011 Japan
| | - Masaru Nakayasu
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, 611-0011 Japan
| | - Shinichi Yamazaki
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Seiryo 2-1, Sendai, 980-8573 Japan
| | - Yuichi Aoki
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Seiryo 2-1, Sendai, 980-8573 Japan
- Department of Applied Information Sciences, Graduate School of Information Sciences, Tohoku University, Aoba 6-3-09, Aramaki-aza Aoba-ku, Sendai, 980-8579 Japan
| | - Hisabumi Takase
- Department of Bioscience and Biotechnology, Faculty of Bioenvironmental Science, Kyoto University of Advanced Science, Sogabecho Nanjo Otani 1-1, Kameoka, 621-8555 Japan
| | - Shin Okazaki
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, 183-8509 Japan
- Department of International Environmental and Agricultural Science, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, 183-8509 Japan
| | - Atsushi J Nagano
- Faculty of Agriculture, Ryukoku University, Seta Oe-cho Yokotani 1-5, Otsu, 520-2194 Japan
- Institute for Advanced Biosciences, Keio University, Nipponkoku 403-1, Daihouji, Tsuruoka, 997-0017 Japan
| | - Akito Kaga
- Institute of Crop Science, National Agriculture and Food Research Organization, Kannondai 2-1-2, Tsukuba, 305-8518 Japan
| | - Kazufumi Yazaki
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, 611-0011 Japan
| | - Akifumi Sugiyama
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, 611-0011 Japan
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4
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Sugiyama A, Kurisu A, Nagashima S, Hando K, Saipova K, Akhmedova S, Abe K, Imada H, Hussain MRA, Ouoba S, E B, Ko K, Akita T, Yamazaki S, Yokozaki M, Tanaka J. Author Correction: Seroepidemiological study of factors affecting anti-spike IgG antibody titers after a two-dose mRNA COVID-19 vaccination in 3744 healthy Japanese volunteers. Sci Rep 2023; 13:1906. [PMID: 36732557 PMCID: PMC9893206 DOI: 10.1038/s41598-023-28884-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Affiliation(s)
- Aya Sugiyama
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Akemi Kurisu
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Shintaro Nagashima
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Kiyomi Hando
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Khilola Saipova
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan ,grid.444564.30000 0004 0402 7972Department of Clinical Radiology and Oncology, Andijan State Medical Institute, Andijan, Uzbekistan
| | - Sayyora Akhmedova
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan ,Department of Cardiorheumatology, Republican Specialized Scientific-Practical Medical Center of Pediatrics, Tashkent, Uzbekistan
| | - Kanon Abe
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Hirohito Imada
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Md Razeen Ashraf Hussain
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Serge Ouoba
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan ,grid.457337.10000 0004 0564 0509Unité de Recherche Clinique de Nanoro (URCN), Institut de Recherche en Science de La Santé (IRSS), Nanoro, Burkina Faso
| | - Bunthen E
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan ,grid.415732.6Payment Certification Agency (PCA), Ministry of Health, Phnom Penh, Cambodia
| | - Ko Ko
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Tomoyuki Akita
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Shinichi Yamazaki
- grid.470097.d0000 0004 0618 7953Division of Clinical Laboratory Medicine, Hiroshima University Hospital, Hiroshima, Japan
| | - Michiya Yokozaki
- grid.470097.d0000 0004 0618 7953Division of Clinical Laboratory Medicine, Hiroshima University Hospital, Hiroshima, Japan
| | - Junko Tanaka
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
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5
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Sakurai N, Yamazaki S, Suda K, Hosoki A, Akimoto N, Takahashi H, Shibata D, Aoki Y. The Thing Metabolome Repository family (XMRs): comparable untargeted metabolome databases for analyzing sample-specific unknown metabolites. Nucleic Acids Res 2022; 51:D660-D677. [PMID: 36417935 PMCID: PMC9825447 DOI: 10.1093/nar/gkac1058] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 10/21/2022] [Accepted: 10/25/2022] [Indexed: 11/25/2022] Open
Abstract
The identification of unknown chemicals has emerged as a significant issue in untargeted metabolome analysis owing to the limited availability of purified standards for identification; this is a major bottleneck for the accumulation of reusable metabolome data in systems biology. Public resources for discovering and prioritizing the unknowns that should be subject to practical identification, as well as further detailed study of spending costs and the risks of misprediction, are lacking. As such a resource, we released databases, Food-, Plant- and Thing-Metabolome Repository (http://metabolites.in/foods, http://metabolites.in/plants, and http://metabolites.in/things, referred to as XMRs) in which the sample-specific localization of unknowns detected by liquid chromatography-mass spectrometry in a wide variety of samples can be examined, helping to discover and prioritize the unknowns. A set of application programming interfaces for the XMRs facilitates the use of metabolome data for large-scale analysis and data mining. Several applications of XMRs, including integrated metabolome and genome analyses, are presented. Expanding the concept of XMRs will accelerate the identification of unknowns and increase the discovery of new knowledge.
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Affiliation(s)
- Nozomu Sakurai
- To whom correspondence should be addressed. Tel: +81 55 981 6895; Fax: +81 55 981 9448; ;
| | | | - Kunihiro Suda
- Kazusa DNA Research Institute, 2-6-7 Kazusa-kamatari, Kisarazu, Chiba 292-0818, Japan
| | - Ai Hosoki
- Bioinformation and DDBJ Center, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
| | - Nayumi Akimoto
- Kazusa DNA Research Institute, 2-6-7 Kazusa-kamatari, Kisarazu, Chiba 292-0818, Japan
| | - Haruya Takahashi
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Daisuke Shibata
- Kazusa DNA Research Institute, 2-6-7 Kazusa-kamatari, Kisarazu, Chiba 292-0818, Japan
| | - Yuichi Aoki
- Correspondence may also be addressed to Yuichi Aoki. Tel: +81 22 274 6040; Fax: +81 22 274 6040;
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6
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Sugiyama A, Kurisu A, Nagashima S, Hando K, Saipova K, Akhmedova S, Abe K, Imada H, Hussain MRA, Ouoba S, E B, Ko K, Akita T, Yamazaki S, Yokozaki M, Tanaka J. Seroepidemiological study of factors affecting anti-spike IgG antibody titers after a two-dose mRNA COVID-19 vaccination in 3744 healthy Japanese volunteers. Sci Rep 2022; 12:16294. [PMID: 36175506 PMCID: PMC9520958 DOI: 10.1038/s41598-022-20747-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 04/15/2022] [Accepted: 09/19/2022] [Indexed: 02/06/2023] Open
Abstract
Several factors related to anti-spike(S) IgG antibody titers after mRNA COVID-19 vaccination have been elucidated, but the magnitude of the effects of each factor has not been fully understood. This cross-sectional study assessed anti-S and anti-nucleocapsid (N) antibody titers on 3744 healthy volunteers (median age, 36 years; IQR, 24-49 years; females, 59.0%) who received two doses of mRNA-1273 or BNT162b2 vaccine and completed a survey questionnaire. Multiple regression was conducted to identify factors associated with antibody titers. All but one participant tested positive for anti-S antibodies (99.97%). The following factors were independently and significantly associated with high antibody titer: < 3 months from vaccination (ratio of means 4.41); mRNA-1273 vaccine (1.90, vs BNT162b2); anti-N antibody positivity (1.62); age (10's: 1.50, 20's: 1.37, 30's: 1.26, 40's: 1.16, 50's: 1.15, vs ≧60's); female (1.07); immunosuppressive therapy (0.54); current smoking (0.85); and current drinking (0.96). The largest impact on anti-S IgG antibody titers was found in elapsed time after vaccination, followed by vaccine brand, immunosuppressants, previous SARS-CoV-2 infection (anti-N antibody positive), and age. Although the influence of adverse reactions after the vaccine, gender, smoking, and drinking was relatively small, they were independently related factors.
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Affiliation(s)
- Aya Sugiyama
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Akemi Kurisu
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Shintaro Nagashima
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Kiyomi Hando
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Khilola Saipova
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan ,grid.444564.30000 0004 0402 7972Department of Clinical Radiology and Oncology, Andijan State Medical Institute, Andijan, Uzbekistan
| | - Sayyora Akhmedova
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan ,Department of Cardiorheumatology, Republican Specialized Scientific-Practical Medical Center of Pediatrics, Tashkent, Uzbekistan
| | - Kanon Abe
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Hirohito Imada
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Md Razeen Ashraf Hussain
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Serge Ouoba
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan ,grid.457337.10000 0004 0564 0509Unité de Recherche Clinique de Nanoro (URCN), Institut de Recherche en Science de La Santé (IRSS), Nanoro, Burkina Faso
| | - Bunthen E
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan ,grid.415732.6Payment Certification Agency (PCA), Ministry of Health, Phnom Penh, Cambodia
| | - Ko Ko
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Tomoyuki Akita
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
| | - Shinichi Yamazaki
- grid.470097.d0000 0004 0618 7953Division of Clinical Laboratory Medicine, Hiroshima University Hospital, Hiroshima, Japan
| | - Michiya Yokozaki
- grid.470097.d0000 0004 0618 7953Division of Clinical Laboratory Medicine, Hiroshima University Hospital, Hiroshima, Japan
| | - Junko Tanaka
- grid.257022.00000 0000 8711 3200Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551 Japan
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7
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Hiraoka H, Wang J, Nakano T, Hirano Y, Yamazaki S, Hiraoka Y, Haraguchi T. ATP levels influence cell movement during the mound phase in Dictyostelium discoideum as revealed by ATP visualization and simulation. FEBS Open Bio 2022; 12:2042-2056. [PMID: 36054629 PMCID: PMC9623536 DOI: 10.1002/2211-5463.13480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 08/16/2022] [Accepted: 08/29/2022] [Indexed: 01/25/2023] Open
Abstract
Cell migration plays an important role in multicellular organism development. The cellular slime mold Dictyostelium discoideum is a useful model organism for the study of cell migration during development. Although cellular ATP levels are known to determine cell fate during development, the underlying mechanism remains unclear. Here, we report that ATP-rich cells efficiently move to the central tip region of the mound against rotational movement during the mound phase. A simulation analysis based on an agent-based model reproduces the movement of ATP-rich cells observed in the experiments. These findings indicate that ATP-rich cells have the ability to move against the bulk flow of cells, suggesting a mechanism by which high ATP levels determine the cell fate of differentiation.
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Affiliation(s)
- Haruka Hiraoka
- Graduate School of Frontier BiosciencesOsaka UniversityJapan,Graduate School of ScienceNagoya UniversityJapan
| | - Jiewen Wang
- Graduate School of InformaticsOsaka Metropolitan UniversityJapan
| | - Tadashi Nakano
- Graduate School of InformaticsOsaka Metropolitan UniversityJapan
| | - Yasuhiro Hirano
- Graduate School of Frontier BiosciencesOsaka UniversityJapan
| | | | - Yasushi Hiraoka
- Graduate School of Frontier BiosciencesOsaka UniversityJapan
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8
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Sugiyama A, Okada F, Abe K, Imada H, Ouoba S, E B, Hussain MRA, Ohisa M, Ko K, Nagashima S, Akita T, Yamazaki S, Yokozaki M, Kishita E, Tanaka J. A longitudinal study of anti-SARS-CoV-2 antibody seroprevalence in a random sample of the general population in Hiroshima in 2020. Environ Health Prev Med 2022; 27:30. [PMID: 35793938 PMCID: PMC9283912 DOI: 10.1265/ehpm.22-00016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND This longitudinal study aimed to determine chronological changes in the seroprevalence of prior SARS-CoV-2 infection, including asymptomatic infections in Hiroshima Prefecture, Japan. METHODS A stratified random sample of 7,500 residents from five cities of Hiroshima Prefecture was selected to participate in a three-round survey from late 2020 to early 2021, before the introduction of the COVID-19 vaccine. The seroprevalence of anti-SARS-CoV-2 antibodies was calculated if at least two of four commercially available immunoassays were positive. Then, the ratio between seroprevalence and the prevalence of confirmed COVID-19 cases in Hiroshima was calculated and compared to the results from other prefectures where the Ministry of Health, Labour and Welfare conducted a survey by using the same reagents at almost the same period. RESULTS The numbers of participants in the first, second, and third rounds of the survey were 3025, 2396, and 2351, respectively and their anti-SARS-CoV-2 antibodies seroprevalences were 0.03% (95% confidence interval: 0.00-0.10%), 0.08% (0.00-0.20%), and 0.30% (0.08-0.52%), respectively. The ratio between the seroprevalence and the prevalence of confirmed COVID-19 cases in Hiroshima was 1.2, which was smaller than that in similar studies in other prefectures. CONCLUSIONS The seroprevalence of anti-SARS-CoV-2 antibodies in Hiroshima increased tenfold in a half year. The difference between seroprevalence and the prevalence of confirmed COVID-19 cases in Hiroshima was smaller than that in other prefectures, suggesting that asymptomatic patients were more actively detected in Hiroshima.
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Affiliation(s)
- Aya Sugiyama
- Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Fumie Okada
- Hiroshima Prefecture Health and Welfare Bureau
| | - Kanon Abe
- Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Hirohito Imada
- Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Serge Ouoba
- Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University.,Unité de Recherche Clinique de Nanoro (URCN), Institut de Recherche en Science de la Santé (IRSS)
| | - Bunthen E
- Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University.,Payment Certification Agency, Ministry of Health
| | - Md Razeen Ashraf Hussain
- Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Masayuki Ohisa
- Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Ko Ko
- Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Shintaro Nagashima
- Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Tomoyuki Akita
- Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Shinichi Yamazaki
- Division of Clinical Laboratory Medicine, Hiroshima University Hospital
| | - Michiya Yokozaki
- Division of Clinical Laboratory Medicine, Hiroshima University Hospital
| | | | - Junko Tanaka
- Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University
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Yamazaki S. T122 Better quality management and greater operating efficiency with GEM® PREMIER™ 5000 with intelligent quality management 2 (IQM®2) at Yokosuka General Hospital, Uwamachi (Kanagawa, Japan). Clin Chim Acta 2022. [DOI: 10.1016/j.cca.2022.04.590] [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: 11/03/2022]
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10
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Kobayashi K, Yamazaki S, Kimura K. Formation of shish-like fibril crystals from the melt of blends of cyclic and linear polyethylene under shear flow. Polym J 2022. [DOI: 10.1038/s41428-022-00643-x] [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: 11/09/2022]
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11
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Adlin N, Hatamoto M, Yamazaki S, Watari T, Yamaguchi T. A potential zero water exchange system for recirculating aquarium using a DHS-USB system coupled with ozone. Environ Technol 2022; 43:275-285. [PMID: 32552551 DOI: 10.1080/09593330.2020.1784295] [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] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 06/10/2020] [Indexed: 06/11/2023]
Abstract
Partial water exchange is one of the most common conventional methods used to maintain water quality and aesthetic beauty in recirculating aquarium systems (RASs). However, this method uses substantial amount of water. The ozone-down-flow hanging sponge-up-flow sludge blanket (ozone-DHS-USB) system attempts to be a more responsible method for aquarium maintenance. It eliminates the necessity for water exchange in aquarium by maintaining nitrogen concentrations at a safe level and by reducing yellow substances. Also, the impact of O3 on the DHS-USB system was investigated. The system was assayed using an on-site freshwater aquarium influenced by ambient temperature ranging from 23°C to 34°C. During ozonation Phases 1 and 3, the colour of the water in the aquarium was successfully maintained below 10 colour units. The 16S rRNA gene analysis of microorganisms in the DHS revealed that constant application of O3 has caused a decrease in nitrite-oxidizing bacteria (NOB). Nevertheless, NH3 and NO2- were maintained within 0.1 mg N L-1, and NO3- was maintained at 14.6 ± 9.20 mg N L-1 throughout the study. Carps survived for 425 days without any water exchange performed. Our study supports that the ozone-DHS-USB system has a high potential towards creating low-maintenance aquaria.
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Affiliation(s)
- Nur Adlin
- Department of Science of Technology Innovation, Nagaoka University of Technology, Nagaoka, Japan
| | - Masashi Hatamoto
- Department of Civil and Environmental Engineering, Nagaoka University of Technology, Nagaoka, Japan
| | - Shinichi Yamazaki
- Department of Social Design Engineering, National Institute of Technology, Kochi College, Kochi, Japan
| | - Takahiro Watari
- Department of Civil and Environmental Engineering, Nagaoka University of Technology, Nagaoka, Japan
| | - Takashi Yamaguchi
- Department of Science of Technology Innovation, Nagaoka University of Technology, Nagaoka, Japan
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12
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Nakayasu M, Yamazaki S, Aoki Y, Yazaki K, Sugiyama A. Triterpenoid and Steroidal Saponins Differentially Influence Soil Bacterial Genera. Plants (Basel) 2021; 10:2189. [PMID: 34685998 PMCID: PMC8538258 DOI: 10.3390/plants10102189] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 09/30/2021] [Accepted: 10/11/2021] [Indexed: 11/23/2022]
Abstract
Plant specialized metabolites (PSMs) are secreted into the rhizosphere, i.e., the soil zone surrounding the roots of plants. They are often involved in root-associated microbiome assembly, but the association between PSMs and microbiota is not well characterized. Saponins are a group of PSMs widely distributed in angiosperms. In this study, we compared the bacterial communities in field soils treated with the pure compounds of four different saponins. All saponin treatments decreased bacterial α-diversity and caused significant differences in β-diversity when compared with the control. The bacterial taxa depleted by saponin treatments were higher than the ones enriched; two families, Burkholderiaceae and Methylophilaceae, were enriched, while eighteen families were depleted with all saponin treatments. Sphingomonadaceae, which is abundant in the rhizosphere of saponin-producing plants (tomato and soybean), was enriched in soil treated with α-solanine, dioscin, and soyasaponins. α-Solanine and dioscin had a steroid-type aglycone that was found to specifically enrich Geobacteraceae, Lachnospiraceae, and Moraxellaceae, while soyasaponins and glycyrrhizin with an oleanane-type aglycone did not specifically enrich any of the bacterial families. At the bacterial genus level, the steroidal-type and oleanane-type saponins differentially influenced the soil bacterial taxa. Together, these results indicate that there is a relationship between the identities of saponins and their effects on soil bacterial communities.
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Affiliation(s)
- Masaru Nakayasu
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji 611-0011, Japan; (M.N.); (K.Y.)
| | - Shinichi Yamazaki
- Tohoku Medical Megabank Organization, Tohoku University, Sendai 980-8573, Japan; (S.Y.); (Y.A.)
| | - Yuichi Aoki
- Tohoku Medical Megabank Organization, Tohoku University, Sendai 980-8573, Japan; (S.Y.); (Y.A.)
| | - Kazufumi Yazaki
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji 611-0011, Japan; (M.N.); (K.Y.)
| | - Akifumi Sugiyama
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji 611-0011, Japan; (M.N.); (K.Y.)
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13
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Mardani-Korrani H, Nakayasu M, Yamazaki S, Aoki Y, Kaida R, Motobayashi T, Kobayashi M, Ohkama-Ohtsu N, Oikawa Y, Sugiyama A, Fujii Y. L-Canavanine, a Root Exudate From Hairy Vetch ( Vicia villosa) Drastically Affecting the Soil Microbial Community and Metabolite Pathways. Front Microbiol 2021; 12:701796. [PMID: 34646244 PMCID: PMC8503639 DOI: 10.3389/fmicb.2021.701796] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 08/30/2021] [Indexed: 12/30/2022] Open
Abstract
L-Canavanine, a conditionally essential non-proteinogenic amino acid analog to L-arginine, plays important roles in cell division, wound healing, immune function, the release of hormones, and a precursor for the synthesis of nitric oxide (NO). In this report, we found that the L-canavanine is released into the soil from the roots of hairy vetch (Vicia villosa) and declines several weeks after growth, while it was absent in bulk proxy. Hairy vetch root was able to exudate L-canavanine in both pots and in vitro conditions in an agar-based medium. The content of the L-canavanine in pots and agar conditions was higher than the field condition. It was also observed that the addition of L-canavanine significantly altered the microbial community composition and diversity in soil. Firmicutes and Actinobacteria became more abundant in the soil after the application of L-canavanine. In contrast, Proteobacteria and Acidobacteria populations were decreased by higher L-canavanine concentration (500 nmol/g soil). Prediction of the soil metabolic pathways using PICRUSt2 estimated that the L-arginine degradation pathway was enriched 1.3-fold when L-canavanine was added to the soil. Results indicated that carbon metabolism-related pathways were altered and the degradation of nitrogen-rich compounds (i.e., amino acids) enriched. The findings of this research showed that secretion of the allelochemical L-canavanine from the root of hairy vetch may alter the soil microbial community and soil metabolite pathways to increase the survival chance of hairy vetch seedlings. This is the first report that L-canavanine acts as an allelochemical that affects the biodiversity of soil microbial community.
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Affiliation(s)
| | - Masaru Nakayasu
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Japan
| | - Shinichi Yamazaki
- Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
| | - Yuichi Aoki
- Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
| | - Rumi Kaida
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Japan
| | - Takashi Motobayashi
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Japan
| | | | - Naoko Ohkama-Ohtsu
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Japan
| | - Yosei Oikawa
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Japan
| | - Akifumi Sugiyama
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Japan
| | - Yoshiharu Fujii
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Japan
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14
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Takayama T, Yamazaki S, Matsuyama Y, Midorikawa Y, Shiina S, Izumi N, Hasegawa K, Kokudo N, Sakamoto M, Kubo S, Kudo M, Murakami T, Nakashima O. Prognostic grade for resecting hepatocellular carcinoma: multicentre retrospective study. Br J Surg 2021; 108:412-418. [PMID: 33793713 DOI: 10.1093/bjs/znaa109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 03/31/2020] [Accepted: 11/03/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND Surgical treatment for hepatocellular carcinoma (HCC) is advancing, but a robust prediction model for survival after resection is not available. The aim of this study was to propose a prognostic grading system for resection of HCC. METHODS This was a retrospective, multicentre study of patients who underwent first resection of HCC with curative intent between 2000 and 2007. Patients were divided randomly by a cross-validation method into training and validation sets. Prognostic factors were identified using a Cox proportional hazards model. The predictive model was built by decision-tree analysis to define the resection grades, and subsequently validated. RESULTS A total of 16 931 patients from 795 hospitals were included. In the training set (8465 patients), four surgical grades were classified based on prognosis: grade A1 (1236 patients, 14.6 per cent; single tumour 3 cm or smaller and anatomical R0 resection); grade A2 (3614, 42.7 per cent; single tumour larger than 3 cm, or non-anatomical R0 resection); grade B (2277, 26.9 per cent; multiple tumours, or vascular invasion, and R0 resection); and grade C (1338, 15.8 per cent; multiple tumours with vascular invasion and R0 resection, or R1 resection). Five-year survival rates were 73.9 per cent (hazard ratio (HR) 1.00), 64.7 per cent (HR 1.51, 95 per cent c.i. 1.29 to 1.78), 50.6 per cent (HR 2.53, 2.15 to 2.98), and 34.8 per cent (HR 4.60, 3.90 to 5.42) for grades A1, A2, B, and C respectively. In the validation set (8466 patients), the grades had equivalent reproducibility for both overall and recurrence-free survival (all P < 0.001). CONCLUSION This grade is used to predict prognosis of patients undergoing resection of HCC.
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Affiliation(s)
- T Takayama
- Department of Digestive Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - S Yamazaki
- Department of Digestive Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - Y Matsuyama
- Department of Biostatistics, School of Public Health, University of Tokyo, Tokyo, Japan
| | - Y Midorikawa
- Department of Digestive Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - S Shiina
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - N Izumi
- Department of Gastroenterology, Musashino Red Cross Hospital, Tokyo, Japan
| | - K Hasegawa
- Department of Hepato-biliary-pancreatic Surgery, School of Medicine, University of Tokyo, Tokyo, Japan
| | - N Kokudo
- Department of Hepato-biliary-pancreatic Surgery, National Center for Global Health and Medicine, Tokyo, Japan
| | - M Sakamoto
- Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - S Kubo
- Department of Hepato-biliary-pancreatic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - M Kudo
- Department of Gastroenterology and Hepatology, Kinki University School of Medicine, Osaka-Sayama, Japan
| | - T Murakami
- Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - O Nakashima
- Department of Clinical Laboratory Medicine, Kurume University Hospital, Kurume, Japan
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15
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Nakayasu M, Ohno K, Takamatsu K, Aoki Y, Yamazaki S, Takase H, Shoji T, Yazaki K, Sugiyama A. Tomato roots secrete tomatine to modulate the bacterial assemblage of the rhizosphere. Plant Physiol 2021; 186:270-284. [PMID: 33619554 PMCID: PMC8154044 DOI: 10.1093/plphys/kiab069] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 01/31/2021] [Indexed: 05/12/2023]
Abstract
Saponins are the group of plant specialized metabolites which are widely distributed in angiosperm plants and have various biological activities. The present study focused on α-tomatine, a major saponin present in tissues of tomato (Solanum lycopersicum) plants. α-Tomatine is responsible for defense against plant pathogens and herbivores, but its biological function in the rhizosphere remains unknown. Secretion of tomatine was higher at the early growth than the green-fruit stage in hydroponically grown plants, and the concentration of tomatine in the rhizosphere of field-grown plants was higher than that of the bulk soil at all growth stages. The effects of tomatine and its aglycone tomatidine on the bacterial communities in the soil were evaluated in vitro, revealing that both compounds influenced the microbiome in a concentration-dependent manner. Numerous bacterial families were influenced in tomatine/tomatidine-treated soil as well as in the tomato rhizosphere. Sphingomonadaceae species, which are commonly observed and enriched in tomato rhizospheres in the fields, were also enriched in tomatine- and tomatidine-treated soils. Moreover, a jasmonate-responsive ETHYLENE RESPONSE FACTOR 4 mutant associated with low tomatine production caused the root-associated bacterial communities to change with a reduced abundance of Sphingomonadaceae. Taken together, our results highlight the role of tomatine in shaping the bacterial communities of the rhizosphere and suggest additional functions of tomatine in belowground biological communication.
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Affiliation(s)
- Masaru Nakayasu
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - Kohei Ohno
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - Kyoko Takamatsu
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - Yuichi Aoki
- Tohoku Medical Megabank Organization, Tohoku University, Sendai 980-8573, Japan
| | - Shinichi Yamazaki
- Tohoku Medical Megabank Organization, Tohoku University, Sendai 980-8573, Japan
| | - Hisabumi Takase
- Faculty of Bioenvironmental Science, Kyoto University of Advanced Science, Kameoka, Kyoto 621-8555, Japan
| | - Tsubasa Shoji
- Department of Biological Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0101, Japan
| | - Kazufumi Yazaki
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - Akifumi Sugiyama
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji 611-0011, Japan
- Author for communication:
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16
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Yamazaki S, Mardani-Korrani H, Kaida R, Ochiai K, Kobayashi M, Nagano AJ, Fujii Y, Sugiyama A, Aoki Y. Field multi-omics analysis reveals a close association between bacterial communities and mineral properties in the soybean rhizosphere. Sci Rep 2021; 11:8878. [PMID: 33893339 PMCID: PMC8065045 DOI: 10.1038/s41598-021-87384-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 03/26/2021] [Indexed: 02/07/2023] Open
Abstract
The plant root-associated environments such as the rhizosphere, rhizoplane, and endosphere are different from the outer soil region (bulk soil). They establish characteristic conditions including microbiota, metabolites, and minerals, and they can directly affect plant growth and development. However, comprehensive insights into those characteristic environments, especially the rhizosphere, and molecular mechanisms of their formation are not well understood. In the present study, we investigated the spatiotemporal dynamics of the root-associated environment in actual field conditions by multi-omics analyses (mineral, microbiome, and transcriptome) of soybean plants. Mineral and microbiome analyses demonstrated a characteristic rhizosphere environment in which most of the minerals were highly accumulated and bacterial communities were distinct from those in the bulk soil. Mantel's test and co-abundance network analysis revealed that characteristic community structures and dominant bacterial taxa in the rhizosphere significantly interact with mineral contents in the rhizosphere, but not in the bulk soil. Our field multi-omics analysis suggests a rhizosphere-specific close association between the microbiota and mineral environment.
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Affiliation(s)
- Shinichi Yamazaki
- Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
| | - Hossein Mardani-Korrani
- Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Japan
| | - Rumi Kaida
- Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Japan
| | - Kumiko Ochiai
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Masaru Kobayashi
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | | | - Yoshiharu Fujii
- Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Japan
| | - Akifumi Sugiyama
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Japan
| | - Yuichi Aoki
- Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan.
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Matsuda H, Nakayasu M, Aoki Y, Yamazaki S, Nagano AJ, Yazaki K, Sugiyama A. Diurnal metabolic regulation of isoflavones and soyasaponins in soybean roots. Plant Direct 2020; 4:e00286. [PMID: 33241173 PMCID: PMC7673354 DOI: 10.1002/pld3.286] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 09/23/2020] [Accepted: 10/14/2020] [Indexed: 05/05/2023]
Abstract
Isoflavones and soyasaponins are major specialized metabolites accumulated in soybean roots and secreted into the rhizosphere. Unlike the biosynthetic pathway, the transporters involved in metabolite secretion remain unknown. The developmental regulation of isoflavone and soyasaponin secretions has been recently reported, but the diurnal regulation of their biosynthesis and secretion still needs to be further studied. To address these challenges, we conducted transcriptome and metabolite analysis using hydroponically grown soybean plants at 6-hr intervals for 48 hr in a 12-hr-light/12-hr-dark condition. Isoflavone and soyasaponin biosynthetic genes showed opposite patterns in the root tissues; that is, the former genes are highly expressed in the daytime, while the latter ones are strongly induced at nighttime. GmMYB176 encoding a transcription factor of isoflavone biosynthesis was upregulated from ZT0 (6:00 a.m.) to ZT6 (12:00 a.m.), followed by the induction of isoflavone biosynthetic genes at ZT6. The isoflavone aglycone content in the roots accordingly increased from ZT6 to ZT18 (0:00 a.m.). The isoflavone aglycone content in root exudates was kept consistent throughout the day, whereas that of glucosides increased at ZT6, which reflected the decreased expression of the gene encoding beta-glucosidase involved in the hydrolysis of apoplast-localized isoflavone conjugates. Co-expression analysis revealed that those isoflavone and soyasaponin biosynthetic genes formed separate clusters, which exhibited a correlation to ABC and MATE transporter genes. In summary, the results in this study indicated the diurnal regulation of isoflavone biosynthesis in soybean roots and the putative transporter genes responsible for isoflavone and soyasaponin transport.
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Affiliation(s)
- Hinako Matsuda
- Research Institute for Sustainable HumanosphereKyoto UniversityGokasho, UjiJapan
| | - Masaru Nakayasu
- Research Institute for Sustainable HumanosphereKyoto UniversityGokasho, UjiJapan
| | - Yuichi Aoki
- Tohoku Medical Megabank OrganizationTohoku UniversitySendaiJapan
| | | | | | - Kazufumi Yazaki
- Research Institute for Sustainable HumanosphereKyoto UniversityGokasho, UjiJapan
| | - Akifumi Sugiyama
- Research Institute for Sustainable HumanosphereKyoto UniversityGokasho, UjiJapan
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Ono R, Atarashi H, Yamazaki S, Kimura K. Molecular weight dependence of the growth rate of spherulite of cyclic poly(ε-caprolactone) polymerized by ring expansion reaction. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122403] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Michikawa T, Yamazaki S, Shimizu A, Nitta H, Kato K, Nishiwaki Y, Morokuma S. Exposure to Asian dust within a few days of delivery is associated with placental abruption in Japan: a case-crossover study. BJOG 2019; 127:335-342. [PMID: 31654606 DOI: 10.1111/1471-0528.15999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/21/2019] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Asian dust is a natural phenomenon in which dust particles are transported from desert areas in China and Mongolia to East Asia. Short-term exposure to Asian dust has been associated with cardiovascular disease through mechanisms such as systemic inflammation. Because inflammation is a potential trigger of placental abruption, exposure may also lead to abruption. We examined whether exposure to Asian dust was associated with abruption. DESIGN A bi-directional, time-stratified case-crossover design. SETTING AND POPULATION From the Japan Perinatal Registry Network database, we identified 3014 patients who delivered singleton births in hospitals in nine Japanese prefectures from 2009 to 2014 with a diagnosis of placental abruption. METHODS Asian dust levels were measured at Light Detection and Ranging monitoring stations, and these measurements were used to define the Asian dust days. As there was no information on the onset day of abruption, we assumed this day was the day before delivery (lag1). MAIN OUTCOME MEASURES Placental abruption. RESULTS During the study period, the Asian dust days ranged from 15 to 71 days, depending on the prefecture. The adjusted odds ratio of placental abruption associated with exposure to Asian dust was 1.4 (95% confidence interval = 1.0, 2.0) for cumulative lags of 1-2 days. Even after adjustment for co-pollutant exposures, this association did not change substantially. CONCLUSIONS In this Japanese multi-area study, exposure to Asian dust was associated with an increased risk of placental abruption. TWEETABLE ABSTRACT Exposure to environmental factors such as Asian dust may be a trigger of placental abruption.
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Affiliation(s)
- T Michikawa
- Department of Environmental and Occupational Health, School of Medicine, Toho University, Tokyo, Japan.,Centre for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - S Yamazaki
- Centre for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - A Shimizu
- Centre for Regional Environmental Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - H Nitta
- Centre for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - K Kato
- Department of Obstetrics and Gynaecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Y Nishiwaki
- Department of Environmental and Occupational Health, School of Medicine, Toho University, Tokyo, Japan
| | - S Morokuma
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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20
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Kadowaki S, Yamazaki S, Kotani Y, Tsuji T, Sakoda N, Kobayashi Y, Horio N, Goto T, Muraoka G, Ozawa S, Suezawa T, Kuroko Y, Tateishi A, Shimizu S, Kasahara S. P1833The c-fos mRNA expression reveals persistent myocardial stretch in the right ventricle during asphyxiated cardiac arrest. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Donation after circulatory death (DCD) heart transplantation has been debated over the past decades because of the shortage of donor. The right ventricular dysfunction is one of the remaining problems for clinical implication of DCD heart transplantation. DCD hearts suffering from the volume overload have a potential to aggravate the right ventricular dysfunction after heart transplantation. The c-fos mRNA is one of the “immediate” response genes to mechanical stresses, such as myocardial cell stretch, without neural and humoral factors. In this study, we assessed myocardial stretch during asphyxiated cardiac arrest using c-fos mRNA expression.
Purpose
The purpose of this study is to reveal the impact of right ventricular volume overload during asphyxiated cardiac arrest.
Methods
Male Wistar rats (8 weeks of age, n=18) were anesthetized with paralyzed ventilation. The trachea was dissected and ligated to initiate asphyxiation. Hearts were harvested at 3 time points: 0, 15 and 30 minutes after termination of the ventilation. Free walls of right and left ventricle were sectioned and immersed in RNA stabilization solution as soon as possible. Total RNA was extracted from these tissues using a guanidine thiocyanate-phenol-chloroform method and cDNA was synthesized using a reverse transcriptase. Next, we measured the quantified expression level by using the droplet digital PCR method with a probe and primers for c-fos gene. Expression of c-fos level was divided by extracted TATA binding protein (TBP) level as a control marker, the ratio of c-fos and TBP was used in analysis.
Results
In the left ventricle, the expression of c-fos rapidly increased by 15 minutes (0.81±0.24 (c-fos/TBP), p<0.05 by one-way ANOVA followed by the Dunnett's test) compared to at 0 minutes (0.21±0.06), but the expression level recovered to the baseline level at 30 minutes after termination of the ventilation (0.19±0.03). On the other hand, in the right ventricle, the c-fos expression was gradually elevated and peaked at 30 minutes (0.88±0.20, p<0.05 by the Dunnett's test) compared to at 0 minutes (0.22±0.05).
Conclusion
These results suggest that the volume overload to the right ventricle during asphyxiated cardiac arrest prolongs compared to that to the left ventricle, which may cause the right ventricular dysfunction after DCD heart transplantation.
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Affiliation(s)
| | - S Yamazaki
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Y Kotani
- Okayama University, Okayama, Japan
| | - T Tsuji
- Okayama University, Okayama, Japan
| | - N Sakoda
- Okayama University, Okayama, Japan
| | | | - N Horio
- Okayama University, Okayama, Japan
| | - T Goto
- Okayama University, Okayama, Japan
| | | | - S Ozawa
- Okayama University, Okayama, Japan
| | | | - Y Kuroko
- Okayama University, Okayama, Japan
| | | | - S Shimizu
- National Cerebral and Cardiovascular Center, Osaka, Japan
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21
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Numata S, Keiichi I, Yamazaki S, Kanda K, Yaku H. P1826Computational fluid dynamic analysis of acute aortic dissection. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Mechanism of acute aortic dissection still is not well understood. It is very difficult to predict where, when, and how acute aortic dissection occurs. This time we focused on blood flow velocity (FV), wall shear stress (WSS), and oscillatory shear index (OSI) which is three dimensional fluctuations of WSS inside ascending aorta. It is well recognized that a higher or lower WSS may cause intimal dysfunction, which could result in the progression of atherosclerosis. Furthermore, because of the non-slip boundary mechanical equilibrium of forces, WSS will separate the inner and outer layers of the aorta. This sheer force could stress the medial tissue and result in degeneration. OSI has been reported as important hemodynamic parameter that is highly associated with the progression of atherosclerosis by inducing radical oxygen production of the endothelial cells. Therefore, OSI may be more closely associated with the degeneration of the media in comparison with WSS. This time FV, WSS, and OSI was evaluated using computational fluid dynamics to identify the location of acute aortic dissection entry.
Method
Using computed tomography data of three patients (Case A, B, C) who had acute aortic dissection, each three pre-dissection aorta model was made. Computer simulation images of four dimensional pulsatile blood flow was made and pulsatile cardiac flow from one cardiac cycle was simulated. A three-dimensional movie was made to evaluate FV, WSS, and OSI. One normal size aorta was evaluated as a control.
Results
In control, blood flow inside ascending aorta was laminar, on the contrary, spiral flow was observed in three dissection cases. FV was slightly higher in dissection case (control: 0.56m/s, A: 0.77m/s, B: 1.05m/s, C: 0.35m/s). Maximum WSS in ascending aorta was 3.24Pa in control. In dissection cases, there was patchy high (A: 18.6Pa, B: 25.6Pa, C: 4.0Pa,) WSS lesion in ascending aorta. In case A and B, these patchy high lesions are close to the entry site. In all three dissection case, OSI was high around entry site.
Figure 1
Conclusion
According to our computer simulation, patchy high WSS and high OSI lesion is related with acute dissection entry site at the ascending aorta.
Acknowledgement/Funding
None
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Affiliation(s)
- S Numata
- Kyoto Prefectural University of Medicine, Cardiovascular surgery, Kyoto, Japan
| | - I Keiichi
- Kyoto Prefectural University of Medicine, Cardiovascular surgery, Kyoto, Japan
| | - S Yamazaki
- Kyoto Prefectural University of Medicine, Cardiovascular surgery, Kyoto, Japan
| | - K Kanda
- Kyoto Prefectural University of Medicine, Cardiovascular surgery, Kyoto, Japan
| | - H Yaku
- Kyoto Prefectural University of Medicine, Cardiovascular surgery, Kyoto, Japan
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22
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Sekiguchi A, Fujiwara C, Yamazaki S, Inoue Y, Uchiyama A, Akai R, Iwawaki T, Ishikawa O, Motegi S. 015 Inhibitory effect of kaempferol on skin fibrosis in systemic sclerosis by the suppression of oxidative stress. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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23
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Shimbo T, Yamazaki S, Kitayama T, Ouchi Y, Yamamoto R, Takaki E, Bruckner-Tuderman L, Uitto J, Kaneda Y, Tamai K. 579 Single cell transcriptome and epigenome analyses in a murine model of dystrophic epidermolysis bullosa. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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24
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Yamazaki S, Odanaka M, Shime H, Imai M, Hemmi H, Kaisho T, Ohkura N, Sakaguchi S, Morita A. 051 Dermal dendritic cells present neo-self antigens induced by ultraviolet B exposure to expand Foxp3+ regulatory T cells. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.127] [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: 11/16/2022]
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25
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Yamazaki S, Ochiai K, Matoh T. Rice plants have three homologs of glutathione synthetase genes, one of which, OsGS2, codes for hydroxymethyl-glutathione synthetase. Plant Direct 2019; 3:e00119. [PMID: 31245762 PMCID: PMC6508825 DOI: 10.1002/pld3.119] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 01/20/2019] [Accepted: 02/02/2019] [Indexed: 05/23/2023]
Abstract
Glutathione is a ubiquitous thiol tripeptide in land plants, and glutathione-like tripeptides can also be found in some plant species. Rice (Oryza sativa) plants synthesize hydroxymethyl-glutathione, in which the terminal glycine residue of glutathione is replaced by a serine residue; however, the biosynthetic pathway of hydroxymethyl-glutathione has not been identified. We isolated three rice glutathione synthetase homologs, designated OsGS1, OsGS2, and OsGS3, and found that knockdown of OsGS2 via RNA interference markedly decreased hydroxymethyl-glutathione concentration in rice plants. The in vitro enzyme assay, using purified recombinant protein, demonstrated that OsGS2 catalyzed the synthesis of hydroxymethyl-glutathione from γ-glutamylcysteine (γEC) and L-serine in an ATP-dependent manner. OsGS2 could also utilize glycine as a cosubstrate with γEC, but the enzyme-substrate affinity for L-serine was tenfold higher than that for glycine. These results indicate that OsGS2 codes for hydroxymethyl-glutathione synthetase.
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Affiliation(s)
| | - Kumiko Ochiai
- Graduate School of AgricultureKyoto UniversityKyotoJapan
| | - Toru Matoh
- Graduate School of AgricultureKyoto UniversityKyotoJapan
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26
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Goda T, Kinoshita I, Oizumi S, Nakano K, Harada T, Kawai Y, Sakakibara-Konishi J, Yokouchi H, Morikawa N, Yamada N, Yamazaki S, Sugawara S, Asahina H, Amano T, Hatanaka Y, Matsuno Y, Nishihara H, Isobe H, Nishimura M, Dosaka-Akita H. A prospective observational study of HER2 alterations in NSCLCs: HOT1303-A. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy292.111] [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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27
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Shimbo T, Sasaki E, Kitayama T, Yamazaki S, Nishida M, Ouchi Y, Yamamoto R, Bruckner-Tuderman L, Uitto J, Kikuchi Y, Katayama I, Kaneda Y, Tamai K. 843 Systemic delivery of HMGB1 promotes tissue regeneration by activating PDGFRα cells in a mouse model of epidermolysis bullosa. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.853] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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28
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Fujiwara C, Sekiguchi A, Yamazaki S, Ishikawa O, Motegi S. 845 Inhibitory regulation of MFG-E8 on fibrosis in systemic sclerosis via modulating TGF-β signaling. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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29
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Yamazaki S, Satomura Y. Standard Method for Describing an Electronic Patient Record Template: Application of XML to Share Domain Knowledge. Methods Inf Med 2018. [DOI: 10.1055/s-0038-1634254] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Abstract:A Template Definition Language (TDL) was developed to share knowledge of how to construct an electronic patient record (EPR) template. Based on the extensible markup language XML, TDL has been designed to be independent of EPR platforms or databases. Our research of TDL was conducted through evaluation of the description of various templates in the currently available EPRs and through comparisons with some electronic clinical guidelines. We conclude that TDL is sufficient for the objective but still needs improvement of the algorithm for describing dynamic changes.
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30
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Kamata M, Yamazaki S, Tanise Y, Yamada Y, Nakamura T. Morphological change in peristaltic crawling motion of a narrow pipe inspection robot inspired by earthworm’s locomotion. Adv Robot 2018. [DOI: 10.1080/01691864.2017.1417158] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- M. Kamata
- Precision Mechanics, Chuo University, Tokyo, Japan
| | - S. Yamazaki
- Precision Mechanics, Chuo University, Tokyo, Japan
| | - Y. Tanise
- Precision Mechanics, Chuo University, Tokyo, Japan
| | - Y. Yamada
- Precision Mechanics, Chuo University, Tokyo, Japan
| | - T. Nakamura
- Precision Mechanics, Chuo University, Tokyo, Japan
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31
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Suzuki Y, Sakuma H, Yamazaki S, Ihara J. Lymphatic tract reconstruction using a pedicled deep inferior epigastric perforator flap. Lymphology 2018; 51:79-84. [PMID: 30253459] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We encountered a case in which we used a pedicled deep inferior epigastric perforator(DIEP) flap to repair a lymphatic leak. This case shows that such repairs can lead to the reconstruction of the lymphatic tract and prevent lymphatic leak recurrences. The present report describes a 45-year-old woman with ovarian cancer who underwent hysterectomy, bilateral salpingo-oophorectomy, pelvic lymphadenectomy, para-aortic lymphadenectomy, and omentectomy. She presented with a pelvic lymphocele with lower-extremity swelling. Lymphovenous anastomosis was performed and swelling of the lower extremity abated. However, because of the occurrence of deep vein thrombosis and the recurrence of swelling, we used a 6-cm-long and 14-cm-wideDIEP flap after lymphocele fenestration. The flap was de-epithelialized and fixed into the peritoneum, with the cutis side facing the leakage point. The postoperative course was uneventful, and no recurrence was observed. We obtained good results by providing abundant blood flow to abundant lymph tissue at the fenestration point. It is known that lymphatic vessels can spontaneously connect with each other. We hypothesize that the DIEP flap improved the edema in this case by regenerating the lymphatic network and improving flow into the bridging flap.
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Affiliation(s)
- Y Suzuki
- Department of Plastic and Reconstructive Surgery, Yokohama Municipal Citizen's Hospital, Yokohama, Japan
| | - H Sakuma
- Department of Plastic and Reconstructive Surgery, Yokohama Municipal Citizen's Hospital, Yokohama, Japan
| | - S Yamazaki
- Department of Plastic and Reconstructive Surgery, University of the Ryukyus, Okinawa, Japan
| | - J Ihara
- Department of Plastic and Reconstructive Surgery, Yokohama Municipal Citizen's Hospital, Yokohama, Japan
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32
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Yamazaki S, Ueda Y, Mukai A, Ochiai K, Matoh T. Rice phytochelatin synthases OsPCS1 and OsPCS2 make different contributions to cadmium and arsenic tolerance. Plant Direct 2018; 2:e00034. [PMID: 31245682 PMCID: PMC6508543 DOI: 10.1002/pld3.34] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 12/05/2017] [Accepted: 12/14/2017] [Indexed: 05/18/2023]
Abstract
Cadmium (Cd) and arsenic (As) pollution in paddy soil and their accumulation in rice (Oryza sativa) pose serious threats to human health. Rice internally detoxifies these toxic metal and metalloid to some extent, resulting in their accumulation within the edible parts. However, the mechanisms of Cd and As detoxification in rice have been poorly elucidated. Plants synthesize thiol-rich metal-chelating peptides, termed phytochelatins (PCs). We characterized rice PC synthase (PCS) and investigated its contribution to Cd and As tolerance in rice. We identified two PCS homolog genes, OsPCS1 and OsPCS2, in the rice genome. The expression of OsPCS1 was upregulated by As(III) stress in the roots but that of OsPCS2 was not significantly affected. The expression level of OsPCS2 was higher than that of OsPCS1 in the shoots and roots. Recombinant OsPCS1 and OsPCS2 proteins differed in their metal activation. OsPCS1 was more strongly activated by As(III) than by Cd; however, OsPCS2 was more strongly activated by Cd than by As(III). Genetically engineered plants having their OsPCS2 expression silenced via RNA interference (OsPCS2 RNAi) contained less PCs and more glutathione (GSH), a substrate of PC synthesis, than wild-type plants, although there was no significant difference in OsPCS1 RNAi plants. OsPCS2 RNAi plants were sensitive to As(III) stress, but Cd tolerance was little affected. On the other hand, treatment with buthionine sulfoximine, an inhibitor of GSH biosynthesis, significantly decreased Cd and As tolerance of rice seedlings. These findings indicate that OsPCS2 is a major isozyme controlling PC synthesis, and that PCs are important for As tolerance in rice. However, PC synthesis may make a smaller contribution to Cd tolerance in rice, and GSH plays crucial roles, not only as a substrate of PC synthesis.
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Affiliation(s)
| | - Yosuke Ueda
- Graduate School of AgricultureKyoto UniversityKyotoJapan
| | - Aya Mukai
- Graduate School of AgricultureKyoto UniversityKyotoJapan
| | - Kumiko Ochiai
- Graduate School of AgricultureKyoto UniversityKyotoJapan
| | - Toru Matoh
- Graduate School of AgricultureKyoto UniversityKyotoJapan
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33
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Torii K, Kubo R, Furuhashi T, Muramatsu S, Sagawa Y, Saito C, Yamazaki S, Morita A. 638 Photochemotherapy limits Treg plasticity and restores Treg function in psoriasis patients. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.07.314] [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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34
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Mori S, Miura H, Yamazaki S, Suzuki T, Shimizu A, Seki Y, Kunugi T, Nishio S, Fujisawa N, Hishinuma A, Kikuchi M. Preliminary Design of a Solid Particulate Cooled Blanket for the Steady State Tokamak Reactor (SSTR). ACTA ACUST UNITED AC 2017. [DOI: 10.13182/fst92-a29973] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- S. Mori
- Kawasaki Heavy Industries, Ltd., 2-4-25 Minami-suna, Koto-ku,Tokyo, 136, Japan (3)3615-5147
| | - H. Miura
- Kawasaki Heavy Industries, Ltd., 2-4-25 Minami-suna, Koto-ku,Tokyo, 136, Japan (3)3615-5147
| | - S. Yamazaki
- Kawasaki Heavy Industries, Ltd., 2-4-25 Minami-suna, Koto-ku,Tokyo, 136, Japan (3)3615-5147
| | - T. Suzuki
- Kawasaki Heavy Industries, Ltd., 2-4-25 Minami-suna, Koto-ku,Tokyo, 136, Japan (3)3615-5147
| | - A. Shimizu
- Kyushu University, 6-1 Kasuga-koen, Kasuga city, Fukuoka-ken, 816, Japan (92)573-9611
| | - Y. Seki
- Japan Atomic Energy Research Institute, Naka-machi, Naka-gun, Ibaraki-ken, 311-01, Japan (292)70-7520
| | - T. Kunugi
- Japan Atomic Energy Research Institute, Naka-machi, Naka-gun, Ibaraki-ken, 311-01, Japan (292)70-7520
| | - S. Nishio
- Japan Atomic Energy Research Institute, Naka-machi, Naka-gun, Ibaraki-ken, 311-01, Japan (292)70-7520
| | - N. Fujisawa
- Japan Atomic Energy Research Institute, Naka-machi, Naka-gun, Ibaraki-ken, 311-01, Japan (292)70-7520
| | - A. Hishinuma
- Japan Atomic Energy Research Institute, Naka-machi, Naka-gun, Ibaraki-ken, 311-01, Japan (292)70-7520
| | - M. Kikuchi
- Japan Atomic Energy Research Institute, Naka-machi, Naka-gun, Ibaraki-ken, 311-01, Japan (292)70-7520
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35
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Shimizu S, Yamazaki S, Akiyama T, Kawada T, Pearson J, Shishido T, Sugimachi M. P5159Cardiac microdialysis enables us to monitor myocardial interstitial microRNA levels in an in-vivo beating rat heart during ischaemia/reperfusion. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p5159] [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: 11/13/2022] Open
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36
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Yamazaki S, Yasumura S. DOES COHABITATING FAMILIES’ INVOLVEMENT AFFECT DEPRESSION AMONG COMMUNITY-DWELLING OLDER ADULTS? Innov Aging 2017. [DOI: 10.1093/geroni/igx004.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - S. Yasumura
- Fukushima Medical University, Fukushima, Japan
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37
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Ura C, Okamura T, Yamazaki S, Ishiguro T, Miyazaki M, Ibe M, Kubota A, Kawamuro Y. RICE-FARMING CARE FOR PEOPLE WITH DEMENTIA; A NOVEL WAY OF SOCIAL PARTICIPATION FOR THE ELDERLY. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- C. Ura
- Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan,
| | - T. Okamura
- Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan,
- University of Tokyo, Tokyo, Japan,
| | | | | | | | - M. Ibe
- Kawamuro Memorial Hospital, Niigata, Japan
| | - A. Kubota
- Kawamuro Memorial Hospital, Niigata, Japan
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38
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Shimbo T, Yamazaki S, Wang X, Kikuchi Y, Bruckner-Tuderman L, Kaneda Y, Tamai K. 906 Systemic HMGB1 administration ameliorates cutaneous and non-cutaneous manifestations in a dystrophic epidermolysis bullosa model mouse. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.02.933] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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39
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Nakayama H, Adachi N, Atarashi H, Uchida T, Yamazaki S, Kimura K. Size control of aromatic polyamide hollow spheres prepared by reaction-induced phase separation. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.01.060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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40
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Sakaguchi T, Yamazaki S, Hashimoto T. Enhancement of CO2 permeability of poly(vinyl ether)s having oxyethylene chains by the sequence control of crosslinking sites. RSC Adv 2017. [DOI: 10.1039/c7ra01353a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Triblock copolymers exhibited high gas permeability than the random copolymers. The triblock copolymers have the crosslinking only at the end segments, which makes the polymer chains more flexible than the random copolymers.
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Affiliation(s)
- T. Sakaguchi
- Department of Materials Science and Engineering
- Graduate School of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - S. Yamazaki
- Department of Materials Science and Engineering
- Graduate School of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - T. Hashimoto
- Department of Materials Science and Engineering
- Graduate School of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
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41
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Maruyama D, Yamazaki S, Honda E, Suzuki E, Hommatsu K, Oshiba R, Sato N. [Basic Study on Visibility and Water Equivalency of a New Colorless Transparent Bolus for Electron Radiotherapy]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2017; 73:194-201. [PMID: 28331147 DOI: 10.6009/jjrt.2017_jsrt_73.3.194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Boluses used in electron radiotherapy need to have radiation field visibility and water equivalence. In this report, we have examined field visibility and water equivalence of a new colorless transparent bolus. We examined field visibility, water equivalence, and dose profile. Field visibility was evaluated by comparison to conventional bolus. Water equivalence was investigated by a measured fluence scaling factor. The dose profile was measured by using radiochromic film with the bolus and an ionization chamber in water. We confirmed that the irradiation field could clearly be seen through the transparent colorless bolus. The bolus did not cast a field edge as compared with the conventional bolus. The fluence scaling factor was less than 0.8% as compared to water. We confirmed that the colorless transparent bolus was treated as a water equivalent material. The percentage depth dose (PDD) measured by using radiochromic film with the bolus matched the PDD measured with an ionization chamber in water. R50 was less than 1 mm as compared to PDD measured with an ionization chamber. It was confirmed that the colorless transparent bolus can use to set up patient without losing visibility on flat ground planes. The fluence scaling factor and dose profile measured by using the bolus matched the results measured in water. Therefore, the new colorless transparent bolus has feasibility to improve patient setup efficiency and can improve calculation accuracy by using the fluence scaling factor.
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Affiliation(s)
- Daiki Maruyama
- Department of Medical Technology, Japanese Red Cross Medical Center
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Ichida A, Hasegawa K, Takayama T, Kudo H, Sakamoto Y, Yamazaki S, Midorikawa Y, Higaki T, Matsuyama Y, Kokudo N. Randomized clinical trial comparing two vessel-sealing devices with crush clamping during liver transection. Br J Surg 2016; 103:1795-1803. [DOI: 10.1002/bjs.10297] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 06/24/2016] [Accepted: 07/13/2016] [Indexed: 12/22/2022]
Abstract
Abstract
Background
Previous RCTs have failed to demonstrate the usefulness of combining energy devices with the conventional clamp crushing method to reduce blood loss during liver transection. Here, the combination of an ultrasonically activated device (UAD) and a bipolar vessel-sealing device (BVSD) with crush clamping was investigated.
Methods
Patients scheduled to undergo hepatectomy at the University of Tokyo Hospital or Nihon University Itabashi Hospital were eligible for this parallel-group, single-blinded randomized study. Patients were assigned to a control group (no energy device used), an UAD group or a BVSD group. The primary endpoint was the volume of blood loss during liver transection. Outcomes of the control group and the combined energy device groups (UAD plus BVSD) were first compared. Pairwise comparisons among the three groups were made for outcomes for which the combined energy device group was superior to the control group.
Results
A total of 380 patients were enrolled between July 2012 and May 2014; 116 patients in the control group, 122 in the UAD group and 123 in the BVSD group were included in the final analysis. Median blood loss during liver transection was lower in the combined energy device group (245 patients) than in the control group (116 patients): median 190 (range 0–3575) versus 230 (range 3–1570) ml (P = 0·048). Pairwise comparison revealed that blood loss was lower in the BVSD group than in the control group (P = 0·043).
Conclusion
The use of energy devices combined with crush clamping reduced blood loss during liver transection. Registration number: C000008372 (www.umin.ac.jp/ctr/index.htm).
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Affiliation(s)
- A Ichida
- Hepato-Biliary-Pancreatic Surgery Division, Department of Surgery, Graduate School of Medicine, Tokyo, Japan
| | - K Hasegawa
- Hepato-Biliary-Pancreatic Surgery Division, Department of Surgery, Graduate School of Medicine, Tokyo, Japan
| | - T Takayama
- Department of Digestive Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - H Kudo
- Hepato-Biliary-Pancreatic Surgery Division, Department of Surgery, Graduate School of Medicine, Tokyo, Japan
| | - Y Sakamoto
- Hepato-Biliary-Pancreatic Surgery Division, Department of Surgery, Graduate School of Medicine, Tokyo, Japan
| | - S Yamazaki
- Department of Digestive Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - Y Midorikawa
- Department of Digestive Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - T Higaki
- Department of Digestive Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - Y Matsuyama
- Department of Biostatistics, School of Public Health, University of Tokyo, Tokyo, Japan
| | - N Kokudo
- Hepato-Biliary-Pancreatic Surgery Division, Department of Surgery, Graduate School of Medicine, Tokyo, Japan
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Sakamoto S, Okeyo KO, Yamazaki S, Kurosawa O, Oana H, Kotera H, Washizu M. Adhesion patterning by a novel air-lock technique enables localization and in-situ real-time imaging of reprogramming events in one-to-one electrofused hybrids. Biomicrofluidics 2016; 10:054122. [PMID: 27822330 PMCID: PMC5085977 DOI: 10.1063/1.4965422] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 09/01/2016] [Indexed: 05/07/2023]
Abstract
Although fusion of somatic cells with embryonic stem (ES) cells has been shown to induce reprogramming, single-cell level details of the transitory phenotypic changes that occur during fusion-based reprogramming are still lacking. Our group previously reported on the technique of one-to-one electrofusion via micro-slits in a microfluidic platform. In this study, we focused on developing a novel air-lock patterning technique for creating localized adhesion zones around the micro-slits for cell localization and real-time imaging of post fusion events with a single-cell resolution. Mouse embryonic fibroblasts (MEF) were fused individually with mouse ES cells using a polydimethylsiloxane (PDMS) fusion chip consisting of two feeder channels with a separating wall containing an array of micro-slits (slit width ∼3 μm) at a regular spacing. ES cells and MEFs were introduced separately into the channels, juxtaposed on the micro-slits by dielectrophoresis and fused one-to-one by a pulse voltage. To localize fused cells for on-chip culture and time-lapse microscopy, we implemented a two-step approach of air-lock bovine serum albumin patterning and Matrigel coating to create localized adhesion areas around the micro-slits. As a result of time-lapse imaging, we could determine that cell division occurs within 24 h after fusion, much earlier than the 2-3 days reported by earlier studies. Remarkably, Oct4-GFP (Green Fluorescent Protein) was confirmed after 25 h of fusion and thereafter stably expressed by daughter cells of fused cells. Thus, integrated into our high-yield electrofusion platform, the technique of air-lock assisted adhesion patterning enables a single-cell level tracking of fused cells to highlight cell-level dynamics during fusion-based reprogramming.
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Affiliation(s)
- S Sakamoto
- Department of Bioengineering, School of Engineering, The University of Tokyo , Tokyo 113-3656, Japan
| | - K O Okeyo
- Department of Mechanical Engineering, School of Engineering, The University of Tokyo , Tokyo 113-3656, Japan
| | - S Yamazaki
- Center for Stem Cell Therapy, The Institute of Medical Science, The University of Tokyo , Tokyo 113-3656, Japan
| | - O Kurosawa
- Department of Bioengineering, School of Engineering, The University of Tokyo , Tokyo 113-3656, Japan
| | - H Oana
- Department of Mechanical Engineering, School of Engineering, The University of Tokyo , Tokyo 113-3656, Japan
| | - H Kotera
- Department of Microengineering, School of Engineering, Kyoto University , Kyoto 606-8501, Japan
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Ohnishi T, Nakagawa M, Wakabayashi K, Uchida T, Yamazaki S, Kimura K. Preparation of helical crystals of aromatic poly(ester-imide) and on-off switching of helix formation. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.06.055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Shojo D, Sugimori H, Yamazaki S, Kimura K. Preparation of aromatic polyimide particles having clear morphology by polymerization of salt monomers. HIGH PERFORM POLYM 2016. [DOI: 10.1177/0954008315619998] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Crystals of salt monomer prepared from aromatic tetracarboxylic acids and aromatic diamines were polymerized at 220°C for 3 h and at 400°C for 3 h under argon flow. Highly crystalline polyimide particles having clear morphology were obtained with good yield. They were lozenge-like crystals, long plate-like crystals, fibrillar crystals, and spherical aggregates of plate-like crystals. The crystals of salt monomer were polymerized in the solid-state with maintaining the morphology, and therefore the morphology of the polyimide particles were the same to that of the crystals of the corresponding salt monomer. Molecular orientation in the lozenge-shaped crystal of poly( p-phenylene pyromelliteimide) was examined by selected area electron diffraction, and the polymer molecules aligned perpendicular to the plate plane which was the direction of the thickness. Obtained particles possessed good thermal stability.
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Affiliation(s)
- Daisaku Shojo
- Graduate School of Environmental and Life Science, Okayama University, Japan
- Functional Materials Research Laboratory, KRI Inc., Japan
| | | | - Shinichi Yamazaki
- Graduate School of Environmental and Life Science, Okayama University, Japan
| | - Kunio Kimura
- Graduate School of Environmental and Life Science, Okayama University, Japan
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Saitoh M, Kobayashi K, Ohmori I, Tanaka Y, Tanaka K, Inoue T, Horino A, Ohmura K, Kumakura A, Takei Y, Hirabayashi S, Kajimoto M, Uchida T, Yamazaki S, Shiihara T, Kumagai T, Kasai M, Terashima H, Kubota M, Mizuguchi M. Cytokine-related and sodium channel polymorphism as candidate predisposing factors for childhood encephalopathy FIRES/AERRPS. J Neurol Sci 2016; 368:272-6. [PMID: 27538648 DOI: 10.1016/j.jns.2016.07.040] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 07/13/2016] [Accepted: 07/14/2016] [Indexed: 11/15/2022]
Abstract
Febrile infection-related epilepsy syndrome (FIRES), or acute encephalitis with refractory, repetitive partial seizures (AERRPS), is an epileptic encephalopathy beginning with fever-mediated seizures. The etiology remains unclear. To elucidate the genetic background of FIRES/AERRPS (hereafter FIRES), we recruited 19 Japanese patients, genotyped polymorphisms of the IL1B, IL6, IL10, TNFA, IL1RN, SCN1A and SCN2A genes, and compared their frequency between the patients and controls. For IL1RN, the frequency of a variable number of tandem repeat (VNTR) allele, RN2, was significantly higher in the patients than in controls (p=0.0067), and A allele at rs4251981 in 5' upstream of IL1RN with borderline significance (p=0.015). Haplotype containing RN2 was associated with an increased risk of FIRES (OR 3.88, 95%CI 1.40-10.8, p=0.0057). For SCN1A, no polymorphisms showed a significant association, whereas a missense mutation, R1575C, was found in two patients. For SCN2A, the minor allele frequency of G allele at rs1864885 was higher in patients with borderline significance (p=0.011). We demonstrated the association of IL1RN haplotype containing RN2 with FIRES, and showed a possible association of IL1RN rs4251981 G>A and SCN2A rs1864885 A>G, in Japanese patients. These preliminary findings suggest the involvement of multiple genetic factors in FIRES, which needs to be confirmed by future studies in a larger number of FIRES cases.
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Affiliation(s)
- M Saitoh
- Department of Developmental Medical Sciences, Graduate School of Medicine, The University of Tokyo, Japan.
| | - K Kobayashi
- Department of Child Neurology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
| | - I Ohmori
- Department of Special Needs Education, Graduate School of Education, Okayama University, Japan
| | - Y Tanaka
- Department of Pediatrics, Ohta Nishinouchi General Hospital, Japan
| | - K Tanaka
- Department of Pediatrics, Ohta Nishinouchi General Hospital, Japan
| | - T Inoue
- Department of Pediatrics, Child Medical Center, Osaka City General Hospital, Japan
| | - A Horino
- Department of Pediatrics, Child Medical Center, Osaka City General Hospital, Japan
| | - K Ohmura
- Department of Pediatrics, Kishiwada City Hospital, Japan
| | - A Kumakura
- Department of Pediatrics, Kitano Hospital, Japan
| | - Y Takei
- Division of Neurology, Nagano Childrens' Hospital, Japan
| | - S Hirabayashi
- Division of Neurology, Nagano Childrens' Hospital, Japan
| | - M Kajimoto
- Department of Pediatrics, Yamaguchi University, Japan
| | - T Uchida
- Department of Pediatrics, Sendai City, Hospital, Japan
| | - S Yamazaki
- Department of Pediatrics, Niigata City Hospital, Japan
| | - T Shiihara
- Department of Neurology, Gunma Children's Medical Center, Japan
| | - T Kumagai
- Division of Neurology, National Center for Child Health and Development, Japan
| | - M Kasai
- Division of Neurology, National Center for Child Health and Development, Japan
| | - H Terashima
- Division of Neurology, National Center for Child Health and Development, Japan
| | - M Kubota
- Division of Neurology, National Center for Child Health and Development, Japan
| | - M Mizuguchi
- Department of Developmental Medical Sciences, Graduate School of Medicine, The University of Tokyo, Japan
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Kanetaka Y, Yamazaki S, Kimura K. Preparation of poly(ether ketone)s derived from 2,5-furandicarboxylic acid via nucleophilic aromatic substitution polymerization. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/pola.28193] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yusuke Kanetaka
- Graduate School of Environmental and Life Science, Okayama University; 3-1-1 Tsushima-Naka Kita-Ku Okayama 700-8530 Japan
| | - Shinichi Yamazaki
- Graduate School of Environmental and Life Science, Okayama University; 3-1-1 Tsushima-Naka Kita-Ku Okayama 700-8530 Japan
| | - Kunio Kimura
- Graduate School of Environmental and Life Science, Okayama University; 3-1-1 Tsushima-Naka Kita-Ku Okayama 700-8530 Japan
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48
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Nakatani T, Sase K, Oshiyama H, Akiyama M, Horie M, Nawata K, Nishinaka T, Tanoue Y, Toda K, Tozawa M, Yanase M, Yamazaki S, Ishida M, Hiramatsu A, Kitamura S. Report of Japanese Registry for Mechanically Assisted Circulatory Support (J-MACS) - Non-Pulsatile Implantable LVAS vs. Extracorporeal LVAD as Bridge to Transplantation. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.954] [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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49
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Affiliation(s)
- Yusuke Kanetaka
- Graduate
School of Environmental
and Life Science, Okayama University, 3-1-1 Tsushima-naka Kita-ku, Okayama 700-8530, Japan
| | - Shinichi Yamazaki
- Graduate
School of Environmental
and Life Science, Okayama University, 3-1-1 Tsushima-naka Kita-ku, Okayama 700-8530, Japan
| | - Kunio Kimura
- Graduate
School of Environmental
and Life Science, Okayama University, 3-1-1 Tsushima-naka Kita-ku, Okayama 700-8530, Japan
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50
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Affiliation(s)
- Yusuke Kanetaka
- Graduate School of Environmental and Life Science, Okayama University
| | - Shinichi Yamazaki
- Graduate School of Environmental and Life Science, Okayama University
| | - Kunio Kimura
- Graduate School of Environmental and Life Science, Okayama University
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