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Oyaidzu M, Takeda T, Kimura H, Yoshikawa A, Okada M, Munakata K, Nishikawa M, Okuno K. Correlation Between Annihilation of Radiation Defects and Tritium Release in Neutron-Irradiated LiAlO2. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst05-a1006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Takata H, Motoshima T, Satake S, Nishikawa M. Study of Tritium Behavior in Cement Paste. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst05-a994] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kawasaki T, Manabe Y, Katayama K, Takeishi T, Nishikawa M. Hydrogen Retention in a Tungsten Re-Deposition Layer Formed by Hydrogen RF Plasma. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst05-a992] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Hirohata Y, Shibahara T, Tanabe T, Oya Y, Arai T, Gotoh Y, Masaki K, Yagyu J, Oyaidzu M, Okuno K, Nishikawa M, Miya N. Retention of Hydrogen Isotopes in Divertor Tiles Used in JT-60U. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst05-a986] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Suematsu K, Nishikawa M, Fukada S, Kinjyo T, Koyama T, Yamashita N. The Effect of Water on Tritium Release Behavior from Solid Breeder Candidates. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst08-a1878] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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31
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Kinjyo T, Nishikawa M, Yamashita N, Koyama T, Suematsu K, Fukada S, Enoeda M. Characteristics of Tritium Release Behavior from Solid Breeder Materials. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst08-a1877] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kanazawa T, Nishikawa M, Yamasaki H, Katayama K, Kashimura H, Hanada T, Fukada S. Study on Tritium Release Behavior from Li 2ZrO 3. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst11-a12623] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Uchida Y, Katayama K, Okamura T, Imaoka R, Nishikawa M, Fukada S. Hydrogen Retention in Deposition Layers Formed from Type 316 Stainless Steel. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst08-a1874] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Takata H, Furuichi K, Nishikawa M, Fukada S, Katayama K, Takeishi T, Kobayashi K, Hayashi T, Namba H. Concentration Profiles of Tritium Penetrated into Concrete. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst08-a1800] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Katayama K, Imaoka K, Tokitani M, Miyamoto M, Nishikawa M, Fukada S, Yoshida N. Deuterium and Helium Release and Microstructure of Tungsten Deposition Layers Formed by RF Plasma Sputtering. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst08-a1875] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kasahara S, Katayama K, Fujiki T, Ishikawa S, Fukada S, Nishikawa M. A Study on Carbon and Hydrogen Co-Deposition Behavior in Methane-Hydrogen Mixed Plasma. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst11-a12713] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ueki J, Nakamori M, Nakamura M, Nishikawa M, Yoshida Y, Tanaka A, Morizane A, Kamon M, Araki T, Takahashi MP, Watanabe A, Inagaki N, Sakurai H. Myotonic dystrophy type 1 patient-derived iPSCs for the investigation of CTG repeat instability. Sci Rep 2017; 7:42522. [PMID: 28211918 PMCID: PMC5304155 DOI: 10.1038/srep42522] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 01/09/2017] [Indexed: 02/08/2023] Open
Abstract
Myotonic dystrophy type 1 (DM1) is an autosomal-dominant multi-system disease caused by expanded CTG repeats in dystrophia myotonica protein kinase (DMPK). The expanded CTG repeats are unstable and can increase the length of the gene with age, which worsens the symptoms. In order to establish a human stem cell system suitable for the investigation of repeat instability, DM1 patient-derived iPSCs were generated and differentiated into three cell types commonly affected in DM1, namely cardiomyocytes, neurons and myocytes. Then we precisely analysed the CTG repeat lengths in these cells. Our DM1-iPSCs showed a gradual lengthening of CTG repeats with unchanged repeat distribution in all cell lines depending on the passage numbers of undifferentiated cells. However, the average CTG repeat length did not change significantly after differentiation into different somatic cell types. We also evaluated the chromatin accessibility in DM1-iPSCs using ATAC-seq. The chromatin status in DM1 cardiomyocytes was closed at the DMPK locus as well as at SIX5 and its promoter region, whereas it was open in control, suggesting that the epigenetic modifications may be related to the CTG repeat expansion in DM1. These findings may help clarify the role of repeat instability in the CTG repeat expansion in DM1.
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Ohara A, Saeki Y, Nishikawa M, Yamamoto Y, Yamamoto G. Single-channel Recordings of TREK-1 K+ Channels in Periodontal Ligament Fibroblasts. J Dent Res 2016; 85:664-9. [PMID: 16798870 DOI: 10.1177/154405910608500716] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The periodontal ligament (PDL) works as a suspensory ligament when external mechanical stress is placed on the teeth. PDL fibroblasts, the principal cells in the PDL, are responsible for many PDL functions. We hypothesized that mechanosensitive ion channels are present in human PDL fibroblasts, which are capable of responding to mechanical stress during normal function of the tissue. Using patch-clamp techniques, we detected mechanosensitive TREK-1 K+ channels (a member of the two-pore-domain K+ channel family), whose single-channel conductance was 104 pS in symmetrical K+-rich solutions. The open probability of the channel was low in the quiescent state, but it was strongly increased by the induction of membrane stretch. Arachidonic acid also enhanced the channel activity. RT-PCR and immunocytochemical observations showed the expression of TREK-1 K+ channels in PDL fibroblasts. The results suggest that the activation of TREK-1 K+ channels by masticatory stress contributes to the hyperpolarization of PDL fibroblasts.
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Misumi Y, Okamoto H, Naoki K, Hosomi Y, Ogura T, Masuda N, Minato K, Yokoyama T, Kishi K, Nishikawa M, Kato T, Seki N, Goto I, Watanabe K. Phase I/II study of induction chemotherapy using carboplatin plus irinotecan and sequential thoracic radiotherapy (TRT) for elderly patients with limited-stage small-cell lung cancer (LD-SCLC): The final results of TORG 0604. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw389.06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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40
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Hoshikawa M, Aosasa S, Abe H, Nishikawa M, Noro T, Hiraki S, Kajiwara Y, Moriya T, Yamasaki T, Shinto E, Tsujimoto H, Ueno H, Tanimizu T, Hase K, Yamamoto J. 428. Inframesocolic superior mesenteric artery first approach as an introductory procedure of radical antegrade modular pancreatosplenectomy for distal pancreatic cancer. Eur J Surg Oncol 2016. [DOI: 10.1016/j.ejso.2016.06.268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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41
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Nishizawa M, Chonabayashi K, Nomura M, Tanaka A, Nakamura M, Inagaki A, Nishikawa M, Takei I, Oishi A, Tanabe K, Ohnuki M, Yokota H, Koyanagi-Aoi M, Okita K, Watanabe A, Takaori-Kondo A, Yamanaka S, Yoshida Y. Epigenetic Variation between Human Induced Pluripotent Stem Cell Lines Is an Indicator of Differentiation Capacity. Cell Stem Cell 2016; 19:341-54. [PMID: 27476965 DOI: 10.1016/j.stem.2016.06.019] [Citation(s) in RCA: 145] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Revised: 05/26/2016] [Accepted: 06/28/2016] [Indexed: 12/23/2022]
Abstract
Variation in the differentiation capacity of induced pluripotent stem cells (iPSCs) to specific lineages is a significant concern for their use in clinical applications and disease modeling. To identify factors that affect differentiation capacity, we performed integration analyses between hematopoietic differentiation performance and molecular signatures such as gene expression, DNA methylation, and chromatin status, using 35 human iPSC lines and four ESC lines. Our analyses revealed that hematopoietic commitment of PSCs to hematopoietic precursors correlates with IGF2 expression level, which in turn depends on signaling-dependent chromatin accessibility at mesendodermal genes. Maturation capacity for conversion of PSC-derived hematopoietic precursors to mature blood associates with the amount and pattern of DNA methylation acquired during reprogramming. Our study therefore provides insight into the molecular features that determine the differential capacities seen among human iPSC lines and, through the predictive potential of this information, highlights a way to select optimal iPSCs for clinical applications.
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Nishikawa M, Kaneshiro S, Owaki H, Fuji T. THU0102 Platelet Associated IGG in Patients with Rheumatoid Arthritis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.1817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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43
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Sekiya K, Nakatani E, Fukutomi Y, Kaneda H, Iikura M, Yoshida M, Takahashi K, Tomii K, Nishikawa M, Kaneko N, Sugino Y, Shinkai M, Ueda T, Tanikawa Y, Shirai T, Hirabayashi M, Aoki T, Kato T, Iizuka K, Homma S, Taniguchi M, Tanaka H. Severe or life-threatening asthma exacerbation: patient heterogeneity identified by cluster analysis. Clin Exp Allergy 2016; 46:1043-55. [PMID: 27041475 DOI: 10.1111/cea.12738] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Revised: 03/19/2016] [Accepted: 03/19/2016] [Indexed: 01/01/2023]
Abstract
BACKGROUND Severe or life-threatening asthma exacerbation is one of the worst outcomes of asthma because of the risk of death. To date, few studies have explored the potential heterogeneity of this condition. OBJECTIVES To examine the clinical characteristics and heterogeneity of patients with severe or life-threatening asthma exacerbation. METHODS This was a multicentre, prospective study of patients with severe or life-threatening asthma exacerbation and pulse oxygen saturation < 90% who were admitted to 17 institutions across Japan. Cluster analysis was performed using variables from patient- and physician-orientated structured questionnaires. RESULTS Analysis of data from 175 patients with severe or life-threatening asthma exacerbation revealed five distinct clusters. Cluster 1 (n = 27) was younger-onset asthma with severe symptoms at baseline, including limitation of activities, a higher frequency of treatment with oral corticosteroids and short-acting beta-agonists, and a higher frequency of asthma hospitalizations in the past year. Cluster 2 (n = 35) was predominantly composed of elderly females, with the highest frequency of comorbid, chronic hyperplastic rhinosinusitis/nasal polyposis, and a long disease duration. Cluster 3 (n = 40) was allergic asthma without inhaled corticosteroid use at baseline. Patients in this cluster had a higher frequency of atopy, including allergic rhinitis and furred pet hypersensitivity, and a better prognosis during hospitalization compared with the other clusters. Cluster 4 (n = 34) was characterized by elderly males with concomitant chronic obstructive pulmonary disease (COPD). Although cluster 5 (n = 39) had very mild symptoms at baseline according to the patient questionnaires, 41% had previously been hospitalized for asthma. CONCLUSIONS & CLINICAL RELEVANCE This study demonstrated that significant heterogeneity exists among patients with severe or life-threatening asthma exacerbation. Differences were observed in the severity of asthma symptoms and use of inhaled corticosteroids at baseline, and the presence of comorbid COPD. These findings may contribute to a deeper understanding and better management of this patient population.
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Yin Y, Takahashi Y, Hamana A, Nishikawa M, Takakura Y. Effects of transgene expression level per cell in mice livers on induction of transgene-specific immune responses after hydrodynamic gene transfer. Gene Ther 2016; 23:565-71. [DOI: 10.1038/gt.2016.26] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 02/29/2016] [Accepted: 03/07/2016] [Indexed: 01/19/2023]
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Morita Y, Andersen P, Hotta A, Tsukahara Y, Sasagawa N, Hayashida N, Koga C, Nishikawa M, Saga Y, Evans SM, Koshiba-Takeuchi K, Nishinakamura R, Yoshida Y, Kwon C, Takeuchi JK. Sall1 transiently marks undifferentiated heart precursors and regulates their fate. J Mol Cell Cardiol 2016; 92:158-62. [PMID: 26876450 DOI: 10.1016/j.yjmcc.2016.02.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 02/07/2016] [Accepted: 02/09/2016] [Indexed: 12/15/2022]
Abstract
Cardiac progenitor cells (CPCs) are a crucial source of cells in cardiac development and regeneration. However, reported CPCs are heterogeneous, and no gene has been identified to transiently mark undifferentiated CPCs throughout heart development. Here we show that Spalt-like gene 1 (Sall1), a zing-finger transcription factor, is expressed in undifferentiated CPCs giving rise to both left and right ventricles. Sall1 was transiently expressed in precardiac mesoderm contributing to the first heart field (left ventricle precursors) but not in the field itself. Similarly, Sall1 expression was maintained in the second heart field (outflow tract/right ventricle precursors) but not in cardiac cells. In vitro, high levels of Sall1 at mesodermal stages enhanced cardiomyogenesis, whereas its continued expression suppressed cardiac differentiation. Our study demonstrates that Sall1 marks CPCs in an undifferentiated state and regulates cardiac differentiation. These findings provide fundamental insights into CPC maintenance, which can be instrumental for CPC-based regenerative medicine.
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Funakoshi S, Miki K, Takaki T, Okubo C, Hatani T, Chonabayashi K, Nishikawa M, Takei I, Oishi A, Narita M, Hoshijima M, Kimura T, Yamanaka S, Yoshida Y. Enhanced engraftment, proliferation, and therapeutic potential in heart using optimized human iPSC-derived cardiomyocytes. Sci Rep 2016; 6:19111. [PMID: 26743035 PMCID: PMC4705488 DOI: 10.1038/srep19111] [Citation(s) in RCA: 129] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 12/01/2015] [Indexed: 02/07/2023] Open
Abstract
Human pluripotent stem cell-derived cardiomyocytes (CMs) are a promising tool for cardiac cell therapy. Although transplantation of induced pluripotent stem cell (iPSC)-derived CMs have been reported in several animal models, the treatment effect was limited, probably due to poor optimization of the injected cells. To optimize graft cells for cardiac reconstruction, we compared the engraftment efficiency of intramyocardially-injected undifferentiated-iPSCs, day 4 mesodermal cells, and day 8, day 20, and day 30 purified iPSC-CMs after initial differentiation by tracing the engraftment ratio (ER) using in vivo bioluminescence imaging. This analysis revealed the ER of day 20 CMs was significantly higher compared to other cells. Transplantation of day 20 CMs into the infarcted hearts of immunodeficient mice showed good engraftment, and echocardiography showed significant functional improvement by cell therapy. Moreover, the imaging signal and ratio of Ki67-positive CMs at 3 months post injection indicated engrafted CMs proliferated in the host heart. Although this graft growth reached a plateau at 3 months, histological analysis confirmed progressive maturation from 3 to 6 months. These results suggested that day 20 CMs had very high engraftment, proliferation, and therapeutic potential in host mouse hearts. They also demonstrate this model can be used to track the fate of transplanted cells over a long time.
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Ishikawa J, Yamamoto N, Nishikawa M, Furue H, Hagiwara S, Wakayama H, Yamaguchi S, Hibi H, Yamamoto A. A study of therapeutic effects of serum free conditioned media derived from stem cells from human exfoliated deciduous teeth for rheumatoid arthritis. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Yamaguchi S, Shibata R, Yamamoto N, Nishikawa M, Murohara T, Hibi H, Yamamoto A. Conditioned media derived from dental pulp stem cells prevent myocardial ischemic injury. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Miura H, Kizawa Y, Bito S, Onozawa S, Shimizu T, Higuchi N, Goto Y, Takanashi S, Kubokawa N, Senda K, Nishikawa M, Harada A, Toba K. P-88 Benefits of the Japanese version advance care planning facilitator education program. BMJ Support Palliat Care 2015. [DOI: 10.1136/bmjspcare-2015-000978.217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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50
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Moriya T, Fukatsu K, Noguchi M, Nishikawa M, Fukazawa S, Saitoh D, Hase K, Yamamoto J. MON-PP065: Semi-Elemental Diet Maintains Peyer Patch Lymphocyte Number and Immunoglobulin a Levels in Mouse Small Intestine as well as a Normal Diet. Clin Nutr 2015. [DOI: 10.1016/s0261-5614(15)30497-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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