1
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Seki Y, Ohkuma RC, Miyakawa Y, Karakida T, Yamamoto R, Yamakoshi Y. Hyaluronan and chondroitin sulfate in chicken-vegetable bone broth delay osteoporosis progression. J Food Sci 2024; 89:1791-1803. [PMID: 38317402 DOI: 10.1111/1750-3841.16962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 01/17/2024] [Accepted: 01/17/2024] [Indexed: 02/07/2024]
Abstract
Bone broth has recently gained worldwide recognition as a superfood that supplements several nutrients lacking in modern human diets; however, little is known of its efficacy on osteoporosis. Therefore, we aimed to identify the components of chicken-vegetable bone broth (CVBB) that are associated with osteoporosis prevention and verified the efficacy of these components using in vivo studies. In biochemical and cell biological experiments, CVBB was fractionated using ion exchange chromatography (IEC), and the effect of each IEC fraction on osteoclast differentiation was evaluated based on tartrate-resistant acid phosphatase (TRAP) activity, TRAP staining, and quantitative polymerase chain reaction analysis using mouse macrophage-like cells (RAW264 cell). In animal experiments, an ovariectomized (OVX) rat model was generated, followed by whole bone broth (OVX/CVBB) or IEC fraction (OVX/CVBB-Ext) administration and bone structural parameter characterization of OVX rat tibia based on micro-CT. Four CVBB fractions were obtained using IEC, and the fraction containing both hyaluronan and chondroitin sulfate (CVBB-Ext) led to the maximum inhibition of RAW264 cell differentiation. CVBB-Ext downregulated the expression of osteoclast differentiation marker genes. In animal experiments, the OVX group showed a clear decrease in bone density compared to that in the Sham operation group. The OVX/CVBB and OVX/CVBB-Ext groups showed increased bone mineral density and bone volume/tissue volume values compared to those in the OVX/control group. These results suggested that CVBB and CVBB-Ext slowed osteoporosis progression. Therefore, we conclude that hyaluronan and chondroitin sulfate in CVBB are key substances that impede osteoporosis progression. PRACTICAL APPLICATION: This study provides practical information on the effects of bone broth ingredients on osteoporosis to expand the current knowledge on the efficacy of bone broth, which is a widely consumed food. These results may help in the future development of bone broth as a dietary supplement for managing osteoporosis.
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Affiliation(s)
- Yuka Seki
- Fourth Undergraduate Student, School of Dental Medicine, Tsurumi University, Tsurumi-ku, Yokohama, Japan
| | - Risako Chiba Ohkuma
- Department of Biochemistry and Molecular Biology, School of Dental Medicine, Tsurumi University, Tsurumi-ku, Yokohama, Japan
| | - Yuri Miyakawa
- Department of Pediatric Dentistry, School of Dental Medicine, Tsurumi University, Tsurumi-ku, Yokohama, Japan
| | - Takeo Karakida
- Department of Biochemistry and Molecular Biology, School of Dental Medicine, Tsurumi University, Tsurumi-ku, Yokohama, Japan
| | - Ryuji Yamamoto
- Department of Biochemistry and Molecular Biology, School of Dental Medicine, Tsurumi University, Tsurumi-ku, Yokohama, Japan
| | - Yasuo Yamakoshi
- Department of Biochemistry and Molecular Biology, School of Dental Medicine, Tsurumi University, Tsurumi-ku, Yokohama, Japan
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2
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Higuchi R, Takamisawa I, Seki Y, Iwakura T, Nanasato M. Aortic Laceration During Resheathing of Self-Expanding Valve. Circ J 2023; 87:856. [PMID: 37121702 DOI: 10.1253/circj.cj-23-0167] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Affiliation(s)
| | | | - Yuka Seki
- Department of Cardiology, Sakakibara Heart Institute
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3
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Yamada S, Ko T, Ito M, Sassa T, Nomura S, Okuma H, Sato M, Imasaki T, Kikkawa S, Zhang B, Yamada T, Seki Y, Fujita K, Katoh M, Kubota M, Hatsuse S, Katagiri M, Hayashi H, Hamano M, Takeda N, Morita H, Takada S, Toyoda M, Uchiyama M, Ikeuchi M, Toyooka K, Umezawa A, Yamanishi Y, Nitta R, Aburatani H, Komuro I. TEAD1 trapping by the Q353R-Lamin A/C causes dilated cardiomyopathy. Sci Adv 2023; 9:eade7047. [PMID: 37058558 PMCID: PMC10104473 DOI: 10.1126/sciadv.ade7047] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 03/09/2023] [Indexed: 06/19/2023]
Abstract
Mutations in the LMNA gene encoding Lamin A and C (Lamin A/C), major components of the nuclear lamina, cause laminopathies including dilated cardiomyopathy (DCM), but the underlying molecular mechanisms have not been fully elucidated. Here, by leveraging single-cell RNA sequencing (RNA-seq), assay for transposase-accessible chromatin using sequencing (ATAC-seq), protein array, and electron microscopy analysis, we show that insufficient structural maturation of cardiomyocytes owing to trapping of transcription factor TEA domain transcription factor 1 (TEAD1) by mutant Lamin A/C at the nuclear membrane underlies the pathogenesis of Q353R-LMNA-related DCM. Inhibition of the Hippo pathway rescued the dysregulation of cardiac developmental genes by TEAD1 in LMNA mutant cardiomyocytes. Single-cell RNA-seq of cardiac tissues from patients with DCM with the LMNA mutation confirmed the dysregulated expression of TEAD1 target genes. Our results propose an intervention for transcriptional dysregulation as a potential treatment of LMNA-related DCM.
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Affiliation(s)
- Shintaro Yamada
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
- Genome Science Division, Research Center for Advanced Science and Technologies, The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan
| | - Toshiyuki Ko
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masamichi Ito
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
- Department of Advanced Clinical Science and Therapeutics, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tatsuro Sassa
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
- Genome Science Division, Research Center for Advanced Science and Technologies, The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan
| | - Seitaro Nomura
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
- Genome Science Division, Research Center for Advanced Science and Technologies, The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan
| | - Hiromichi Okuma
- Division of Structural Medicine and Anatomy, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan
| | - Mayuko Sato
- RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa 230-0045, Japan
| | - Tsuyoshi Imasaki
- Division of Structural Medicine and Anatomy, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan
| | - Satoshi Kikkawa
- Division of Structural Medicine and Anatomy, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan
| | - Bo Zhang
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
- Genome Science Division, Research Center for Advanced Science and Technologies, The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan
| | - Takanobu Yamada
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
- Genome Science Division, Research Center for Advanced Science and Technologies, The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan
| | - Yuka Seki
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kanna Fujita
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
- Genome Science Division, Research Center for Advanced Science and Technologies, The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan
| | - Manami Katoh
- Genome Science Division, Research Center for Advanced Science and Technologies, The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan
| | - Masayuki Kubota
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Satoshi Hatsuse
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Mikako Katagiri
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hiromu Hayashi
- Department of Bioscience and Bioinformatics, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, Iizuka, Fukuoka 820-8502, Japan
| | - Momoko Hamano
- Department of Bioscience and Bioinformatics, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, Iizuka, Fukuoka 820-8502, Japan
| | - Norifumi Takeda
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hiroyuki Morita
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shuji Takada
- Department of Systems BioMedicine, National Center for Child Health and Development Research Institute, Setagaya-ku, Tokyo 157-8535, Japan
| | - Masashi Toyoda
- Center for Regenerative Medicine, National Center for Child Health and Development Research Institute, Setagaya-ku, Tokyo 157-8535, Japan
| | - Masanobu Uchiyama
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masashi Ikeuchi
- Division of Biofunctional Restoration, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Kiminori Toyooka
- RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa 230-0045, Japan
| | - Akihiro Umezawa
- Center for Regenerative Medicine, National Center for Child Health and Development Research Institute, Setagaya-ku, Tokyo 157-8535, Japan
| | - Yoshihiro Yamanishi
- Department of Bioscience and Bioinformatics, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, Iizuka, Fukuoka 820-8502, Japan
| | - Ryo Nitta
- Division of Structural Medicine and Anatomy, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan
| | - Hiroyuki Aburatani
- Genome Science Division, Research Center for Advanced Science and Technologies, The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan
| | - Issei Komuro
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
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Hashimoto K, Miyama H, Seki Y, Ibe S, Yamashita T, Fujisawa T, Katsumata Y, Kimura T, Fukuda K, Takatsuki S. Advantage of POLARx over ARCTIC FRONT ADVANCE PRO during pulmonary vein isolation for paroxysmal atrial fibrillation. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.463] [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
Introduction
The electrical pulmonary vein (PV) isolation has been established as a curative therapy for paroxysmal atrial fibrillation (AF). Arctic Front™cryoballoon has been used worldwide for AF cryoablation. Recently, a new cryoballoon, POLARxTM CRYOABLATION system have been introduced, of which material of the balloon is softer and the N2O gas flow rate is higher.
Purpose
The aim was to investigate the procedural parameter and efficacy of POLARx comparing with Arctic Front.
Methods
This retrospective single center study included 101 consecutive patients who underwent paroxysmal AF ablation using cryoballoon at Keio University hospital from April 2021 to March 2022. The procedural data including the cryoballoon temperature and the number and duration of cryoablation were compared between POLARx (POLARx group) and ARCTIC FRONT ADVANCE PRO (AFA group). After the cryoablation, we added the radiofrequency application in order to maximize the isolated area when the voltage was remained inside PV (Figure 1). The necessities of the additional radiofrequency applications were also compared.
Results
In the present study, 64 patients in AFA group and 37 patients in POLARx group were analyzed. POLARx group included younger population and less females (62.8±9.9 vs 67.5±9.4 year of age, P=0.02; 13.5 vs 32.8%, P=0.04). There was no significant difference in comorbidities and examination data such as left atrium diameter or brain natriuretic peptide level. The minimal cryoballoon temperatures reached in POLARx group were lower than AFA group (−59.3±6.2 vs −47.7±7.5°C, P<0.01). No difference was found in the total number and duration of cryoablation and the time to isolate PV (6.1±2.1 vs 5.9±1.6, P=0.69; 790.2±256.1 vs 776.1±235.0 sec, P=0.69; 41.8±21.3 vs 47.1±29.6 sec, P=0.44, respectively). With regard to individual PVs, the total number and duration were tended to be larger at right superior PV in POLARx group (1.9±1.1 vs 1.4±0.7, P=0.01; 231.8±123.8 vs 193.2±83.0 sec, P=0.07), while there was no significant difference at the other PVs. The rate of successful PV isolation by a single cryo-application was not different between AFA and POLARx group (54.3 vs 61.4%, P=0.17). The additional radiofrequency applications were more frequent in AFA group (14.8 vs. 4.9%, P=0.003). There was a significant difference at right inferior PV (32.8 vs 8.1%, P=0.01), while not at left superior PV, left inferior PV and right superior PV (9.4 vs 2.9%, P=0.42; 9.4 vs 5.7%, P=0.71; 7.8 vs 2.7%, P=0.41). Phrenic nerve injury was occurred 1 case in both group and esophageal ulcer was occurred in 1 case in AFA group. No other complication including cardiac tamponade was occurred.
Conclusion
The total number and duration of cryoablation were not significantly different between AFA and POLARx group, except for right superior PV. There was an advantage in largely isolating right inferior PV in POLARx group comparing with AFA group.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- K Hashimoto
- Keio University School of Medicine, Department of Cardiology , Tokyo , Japan
| | - H Miyama
- Keio University School of Medicine, Department of Cardiology , Tokyo , Japan
| | - Y Seki
- Keio University School of Medicine, Department of Cardiology , Tokyo , Japan
| | - S Ibe
- Keio University School of Medicine, Department of Cardiology , Tokyo , Japan
| | - T Yamashita
- Keio University School of Medicine, Department of Cardiology , Tokyo , Japan
| | - T Fujisawa
- Keio University School of Medicine, Department of Cardiology , Tokyo , Japan
| | - Y Katsumata
- Keio University School of Medicine, Department of Cardiology , Tokyo , Japan
| | - T Kimura
- Keio University School of Medicine, Department of Cardiology , Tokyo , Japan
| | - K Fukuda
- Keio University School of Medicine, Department of Cardiology , Tokyo , Japan
| | - S Takatsuki
- Keio University School of Medicine, Department of Cardiology , Tokyo , Japan
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5
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Tsukasaki M, Komatsu N, Negishi-Koga T, Huynh NCN, Muro R, Ando Y, Seki Y, Terashima A, Pluemsakunthai W, Nitta T, Nakamura T, Nakashima T, Ohba S, Akiyama H, Okamoto K, Baron R, Takayanagi H. Periosteal stem cells control growth plate stem cells during postnatal skeletal growth. Nat Commun 2022; 13:4166. [PMID: 35851381 PMCID: PMC9293991 DOI: 10.1038/s41467-022-31592-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 06/22/2022] [Indexed: 12/18/2022] Open
Abstract
The ontogeny and fate of stem cells have been extensively investigated by lineage-tracing approaches. At distinct anatomical sites, bone tissue harbors multiple types of skeletal stem cells, which may independently supply osteogenic cells in a site-specific manner. Periosteal stem cells (PSCs) and growth plate resting zone stem cells (RZSCs) critically contribute to intramembranous and endochondral bone formation, respectively. However, it remains unclear whether there is functional crosstalk between these two types of skeletal stem cells. Here we show PSCs are not only required for intramembranous bone formation, but also for the growth plate maintenance and prolonged longitudinal bone growth. Mice deficient in PSCs display progressive defects in intramembranous and endochondral bone formation, the latter of which is caused by a deficiency in PSC-derived Indian hedgehog (Ihh). PSC-specific deletion of Ihh impairs the maintenance of the RZSCs, leading to a severe defect in endochondral bone formation in postnatal life. Thus, crosstalk between periosteal and growth plate stem cells is essential for post-developmental skeletal growth. Intramembranous and endochondral bone formation have been considered to be independent processes mediated by independent stem cells. Here the authors show that periosteal stem cells participate in both types of bone formation, supporting endochondral formation by producing Ihh.
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Affiliation(s)
- Masayuki Tsukasaki
- Department of Immunology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan
| | - Noriko Komatsu
- Department of Immunology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan
| | - Takako Negishi-Koga
- Department of Community Medicine and Research for Bone and Joint Diseases, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-ku, 113-8421, Tokyo, Japan
| | - Nam Cong-Nhat Huynh
- Department of Immunology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan.,Laboratory of Oral-Maxillofacial Biology, Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, 749000, Viet Nam
| | - Ryunosuke Muro
- Department of Immunology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan
| | - Yutaro Ando
- Department of Immunology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan.,Department of Microbiology, Tokyo Dental College, 2-9-18, Kanda-Misakicho, Chiyoda-ku, 101-0061, Tokyo, Japan
| | - Yuka Seki
- Department of Immunology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan
| | - Asuka Terashima
- Department of Osteoimmunology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan.,Bone and Cartilage Regenerative Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan
| | - Warunee Pluemsakunthai
- Department of Immunology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan
| | - Takeshi Nitta
- Department of Immunology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan
| | - Takashi Nakamura
- Department of Biochemistry, Tokyo Dental College, 2-9-18, Kanda-Misakicho, Chiyoda-ku, 101-0061, Tokyo, Japan
| | - Tomoki Nakashima
- Department of Cell Signaling, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, 113-8549, Tokyo, Japan
| | - Shinsuke Ohba
- Department of Cell Biology, Institute of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, 852-8588, Nagasaki, Japan.,Department of Oral Anatomy and Developmental Biology, Graduate School of Dentistry, Osaka University, 1-8 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Haruhiko Akiyama
- Department of Orthopaedic Surgery, School of Medicine, Gifu University, 1-1 Yanagido, 501-1194, Gifu City, Japan
| | - Kazuo Okamoto
- Department of Osteoimmunology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan
| | - Roland Baron
- Division of Bone and Mineral Research, Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, MA, USA.,Department of Medicine, Harvard Medical School and Endocrine Unit, MGH, Boston, MA, USA
| | - Hiroshi Takayanagi
- Department of Immunology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan.
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6
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Shalehin N, Seki Y, Takebe H, Fujii S, Mizoguchi T, Nakamura H, Yoshiba N, Yoshiba K, Iijima M, Shimo T, Irie K, Hosoya A. Gli1 +-PDL Cells Contribute to Alveolar Bone Homeostasis and Regeneration. J Dent Res 2022; 101:1537-1543. [PMID: 35786034 DOI: 10.1177/00220345221106921] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The periodontal ligament (PDL) contains mesenchymal stem cells (MSCs) that can differentiate into osteoblasts, cementoblasts, and fibroblasts. Nevertheless, the distribution and characteristics of these cells remain uncertain. Gli1, an essential hedgehog signaling transcription factor, functions in undifferentiated cells during embryogenesis. Therefore, in the present study, the differentiation ability of Gli1+ cells was examined using Gli1-CreERT2/ROSA26-loxP-stop-loxP-tdTomato (iGli1/Tomato) mice. In 4-wk-old iGli1/Tomato mice, Gli1/Tomato+ cells were only slightly detected in the PDL, around endomucin-expressing blood vessels. These cells had proliferated over time, localizing in the PDL as well as on the bone and cementum surfaces at day 28. However, in 8-wk-old iGli1/Tomato mice, Gli1/Tomato+ cells were quiescent, as most cells were not immunoreactive for Ki-67. These cells in 8-wk-old mice exhibited high colony-forming unit fibroblast activity and were capable of osteogenic, chondrogenic, and adipogenic differentiation in vitro. In addition, after transplantation of teeth of iGli1/Tomato mice into the hypodermis of wild-type mice, Tomato fluorescence indicating the progeny of Gli1+ cells was detected in the osteoblasts and osteocytes of the regenerated bone. These results demonstrate that Gli1+ cells in the PDL were MSCs and could contribute to the alveolar bone regeneration.
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Affiliation(s)
- N Shalehin
- Division of Histology, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, Japan
| | - Y Seki
- Division of Histology, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, Japan.,Division of Orthodontics and Dentofacial Orthopedics, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, Japan
| | - H Takebe
- Division of Histology, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, Japan
| | - S Fujii
- Division of Oral Surgery, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, Japan
| | - T Mizoguchi
- Oral Health Science Center, Tokyo Dental College, Tokyo, Japan
| | - H Nakamura
- Department of Oral Anatomy, Matsumoto Dental University, Nagano, Japan
| | - N Yoshiba
- Division of Cariology, Department of Oral Health Science, Operative Dentistry and Endodontics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - K Yoshiba
- Division of Oral Science for Health Promotion, Department of Oral Health and Welfare, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - M Iijima
- Division of Orthodontics and Dentofacial Orthopedics, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, Japan
| | - T Shimo
- Division of Oral Surgery, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, Japan
| | - K Irie
- Division of Anatomy, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, Japan
| | - A Hosoya
- Division of Histology, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, Japan
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7
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Seki Y, Yamada T, Kiyosue A, Kimura K, Uehara M, Hatano M, Sasako T, Shirota Y, Sudo A, Ishiura H, Toda T, Yamauchi T, Komuro I. Asymptomatic myocardial infarction in a patient with myotonic dystrophy type 1. J Cardiol Cases 2022; 26:248-251. [DOI: 10.1016/j.jccase.2022.05.004] [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] [Received: 03/30/2022] [Revised: 05/04/2022] [Accepted: 05/10/2022] [Indexed: 10/18/2022] Open
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8
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Fukuda M, Seki Y, Ezato K, Yokoyama K, Nishi H, Suzuki S, Hirai T. Performance evaluation of tungsten for ITER divertor toward mass production. Fusion Engineering and Design 2021. [DOI: 10.1016/j.fusengdes.2021.112283] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Bandaru S, Sano S, Shimizu Y, Seki Y, Okano Y, Sasaki T, Wada H, Otsuki T, Ito T. Impact of heavy rains of 2018 in western Japan: disaster-induced health outcomes among the population of Innoshima Island. Heliyon 2020; 6:e03942. [PMID: 32490225 PMCID: PMC7256463 DOI: 10.1016/j.heliyon.2020.e03942] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 10/08/2019] [Revised: 04/01/2020] [Accepted: 05/05/2020] [Indexed: 11/30/2022] Open
Abstract
Southwestern Japan suffered its worst rains in 2018 causing floods and mudslides, claiming 225 lives and forcing millions for evacuations. Referred as "Heisei san-jū-nenshichi-gatsugōu", the disaster was the result of incessant precipitation caused by the interaction of typhoon "Prapiroon" with the seasonal rain front "Baiu". The present epidemiological study aims to investigate disaster-induced health issues in 728 residents of Innoshima island in the Hiroshima Prefecture by comparing their clinical data in pre-disaster (2017) and disaster-hit (2018) years which was obtained from annual health screening. Comparison of data showed a significant increase in the urine protein concentration in victims following the disaster. Probing further into the household conditions, showed that a total of 59,844 households were affected with water outage during the heavy rains, which was accompanied by severe damage of sewerage pipelines with complete recovery process taking two weeks. This two weeks of the crisis forced victims to refrain from using restrooms which in turn led to infrequent urination, thereby explaining the increased urine protein concentration in victims following the disaster. The present study addresses the acute health implications caused by the water crisis and serves as a precautionary measure for disaster management council to provide enhanced aftercare services in victims in further events of natural disasters.
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Affiliation(s)
- Srinivas Bandaru
- Department of Public Health, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Shunji Sano
- Department of Surgery, Division of Pediatric Cardiothoracic Surgery, University of California San Francisco, San Francisco, CA, USA
| | - Yurika Shimizu
- Department of Public Health, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan.,Department of Pathophysiology - Periodontal Science, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Yuka Seki
- Department of Public Health, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Yoshikazu Okano
- Hitz Hitachi Zosen Health Insurance Association Clinic at Innoshima, Onomichi, Hiroshima, Japan.,Innoshima General Hospital, Onomichi, Hiroshima, Japan
| | - Tamaki Sasaki
- Department of Nephrology & Hypertension, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Hideho Wada
- Department of Hematology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Takemi Otsuki
- Department of Hygiene, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Tatsuo Ito
- Department of Public Health, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan.,Department of Surgery, Division of Pediatric Cardiothoracic Surgery, University of California San Francisco, San Francisco, CA, USA
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Acar V, Erden S, Sarikanat M, Seki Y, Akbulut H, Seydibeyoglu MO. Graphene oxide modified carbon fiber prepregs: A mechanical comparison of the effects of oxidation methods. EXPRESS POLYM LETT 2020. [DOI: 10.3144/expresspolymlett.2020.90] [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: 11/24/2022] Open
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11
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Kazuyori T, Seki Y, Sato A, Fujimoto S, Yamada M, Yamanaka Y, Fujisaki I, Odashima K, Seki A, Ishikawa T, Kuwano K. P2.16-32 Best Supportive Care for Extreme Elderly Lung Cancer Patients. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1899] [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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12
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Seki Y, Kazuyori T, Sato A, Fujimoto S, Yamada M, Yamanaka Y, Fujisaki I, Odashima K, Seki A, Ishikawa T, Kuwano K. P2.16-07 How to Manage Toxicities of EGFR-TKI for Extreme Elderly Lung Cancer Patients: Supportive Care for Patients Aged 85 and Older. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1874] [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: 11/15/2022]
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13
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Nagaoka K, Ogino K, Ogino N, Ito T, Takemoto K, Ogino S, Seki Y, Hamada H, Fujikura Y. Human albumin augmented airway inflammation induced by PM2.5 in NC/Nga mice. Environ Toxicol 2019; 34:836-843. [PMID: 30953400 DOI: 10.1002/tox.22751] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 03/18/2019] [Accepted: 03/22/2019] [Indexed: 06/09/2023]
Abstract
The synergic allergic inflammatory effects of particulate matter (PM) 2.5 and human albumin were investigated in NC/Nga mice, which are hypersensitive to mite allergens. PM2.5 or PM2.5 plus human albumin with aluminum oxide was injected twice intraperitoneally for sensitization. After 7 days, PM2.5 or PM2.5 plus human albumin was administered five times intranasally to mice for further sensitization. Subsequently, PM2.5 was administered as a challenge on the 11th day. On the 12th day, mice were examined for airway hyperresponsiveness (AHR), bronchoalveolar lavage fluid (BALF) cell count, mRNA expression of Th1 , Th2 cytokines, chemokines, and mucus proteins (MUC5AC and MUC5B) in the lung tissue and histopathology. Although PM2.5 or human albumin alone did not induce allergic airway inflammation, simultaneous inoculation of PM2.5 and human albumin-induced airway inflammation showing increase in AHR, total BALF cell numbers, mRNA levels of IL-13, eotaxin 1, eotaxin 2, and MUC5AC, and anti-IG against human serum albumin. Inflammation was observed around the bronchus in PM2.5 plus human albumin-induced lungs. These results demonstrate that PM2.5 can induce allergic airway inflammation through the synergistic action with human albumin in NC/Nga mice.
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Affiliation(s)
- Kenjiro Nagaoka
- Department of Public Health, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science, Okayama, Japan
| | - Keiki Ogino
- Department of Public Health, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science, Okayama, Japan
| | - Noriyoshi Ogino
- Department of Public Health, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science, Okayama, Japan
- Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health Japan, Kitakyushu, Japan
| | - Tatsuo Ito
- Department of Public Health, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science, Okayama, Japan
| | - Kei Takemoto
- Department of Public Health, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science, Okayama, Japan
| | - Shihona Ogino
- Department of Public Health, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science, Okayama, Japan
- First Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health Japan, Kitakyushu, Japan
| | - Yuka Seki
- Department of Public Health, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science, Okayama, Japan
| | - Hiroki Hamada
- Department of Life Science, Okayama University of Science, Okayama, Japan
| | - Yoshihisa Fujikura
- Division of Morphological Analysis, Department of Anatomy, Biology and Medicine, Faculty of Medicine, Oita University, Yufu, Oita, Japan
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14
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Fujita K, Kaburagi H, Nimura A, Miyamoto T, Wakabayashi Y, Seki Y, Aoyama H, Shimura H, Kato R, Okawa A. Lower grip strength and dynamic body balance in women with distal radial fractures. Osteoporos Int 2019; 30:949-956. [PMID: 30607458 PMCID: PMC6502779 DOI: 10.1007/s00198-018-04816-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 12/14/2018] [Indexed: 12/30/2022]
Abstract
UNLABELLED In this case-control study, we concluded that women with distal radial fractures who were surgically treated showed lower grip strength and dynamic body balancing than those of controls. These results suggest that measurements of grip strength and dynamic body balance may be useful screening tools to assess future fracture risk. INTRODUCTION Patients with distal radial fractures (DRFs) are at risk of future fragility fractures. However, their physical characteristics and tendencies for falls remain unclear. We aimed to compare the physical characteristics of women with and without distal radial fractures. METHODS We included 128 women with a DRF as their first fragility fracture (fracture group) who underwent surgical treatment. Concurrently, 128 age- and sex-matched participants without a history of fragility fractures were selected as controls (control group). The participants underwent assessments of grip strength and the body balancing ability test. Measurements were taken twice in the fracture group, at 2 weeks and 6 months postoperatively, and once in the control group. The body balancing ability test included the Functional Reach Test, Timed Up and Go test (TUG), 2-Step test (2ST), and Timed Uni-pedal Stance test. The participants also completed questionnaires about their health. RESULTS There were no significant differences (p > 0.05) in patient characteristics between the groups. The fracture group showed lower grip strength across all age groups. In the DRF group, prolonged TUG time was observed at 2 weeks postoperatively in all age groups and at 6 months in participants aged 55-74 years; the 2ST score was significantly lower in participants aged between 65 and 74 years. CONCLUSIONS Women with DRF demonstrated lower grip strength and dynamic body balancing ability. Lower grip strength and dynamic body balancing ability were identified as significant risk factors in women with DRF, suggesting that these may be useful screening tools to assess fracture risk.
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Affiliation(s)
- K Fujita
- Department of Orthopaedic and Spinal Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
| | - H Kaburagi
- Department of Orthopaedic and Spinal Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - A Nimura
- Department of Functional Joint Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - T Miyamoto
- Department of Functional Joint Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Y Wakabayashi
- Department of Orthopedic Surgery, Yokohama City Minato Red Cross Hospital, Kanagawa, Japan
| | - Y Seki
- Department of Orthopedic Surgery, Suwa Central Hospital, Nagano, Japan
| | - H Aoyama
- Department of Orthopedic Surgery, JA Toride Medical Center, Ibaraki, Japan
| | - H Shimura
- Department of Orthopedic Surgery, Tokyo Bay Urayasu Ichikawa Medical Center, Chiba, Japan
| | - R Kato
- JA Kyosai Research Institute, Tokyo, Japan
| | - A Okawa
- Department of Orthopaedic and Spinal Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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15
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Ogino K, Nagaoka K, Ito T, Takemoto K, Okuda T, Nakayama SF, Ogino N, Seki Y, Hamada H, Takashiba S, Fujikura Y. Involvement of PM2.5-bound protein and metals in PM2.5-induced allergic airway inflammation in mice. Inhal Toxicol 2019; 30:498-508. [PMID: 30849251 DOI: 10.1080/08958378.2018.1561769] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND The aim of this study was to investigate the protein and trace element components of PM2.5 and their contribution to the allergic airway inflammation in BALB/c mice. METHODS PM2.5, treated at high temperature and with a strong acid to hydrolyze any protein content and remove trace elements, was administered to BALB/c mice. Allergic airway inflammation was compared between the three groups (saline, pure PM2.5 and treated PM2.5) by evaluating airway hyperresponsiveness (AHR), bronchoalveolar lavage fluid (BALF) cells, serum IgE, the mRNA of various cytokine (IL-4, IL-5, IL-13, eotaxin-1 and CXCL3), mucus protein mRNA (MUC5ac and MUC5b) and the filtration of inflammatory cells in the lung. RESULTS The treatment of PM2.5 with a strong acid at a high temperature attenuated AHR, eosinophil percentage in BALF, mRNA levels of IL-13 and CXCL3 and peribronchial inflammation. On the contrary, the percentage of neutrophils in BALF, mRNA expression of MIP2α, EGFR, Nrf2, and TLR4 and 4-OH-2-nonenal levels in the lung was increased. Moreover, the treatment of the PM2.5 reduced PM2.5-bound proteins as well as the percentages of the trace elements in PM2.5 in the order Zn > Cu > Pb > P > S > Mn > Fe > Ca > Ni, whereas the percentage of C, Si and Cl increased. CONCLUSIONS PM2.5 collected by of the cyclone system induced allergic airway inflammation in mice. PM2.5-bound proteins and acid-soluble metals may be involved in the pathogenesis of PM2.5-induced allergic airway inflammation.
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Affiliation(s)
- Keiki Ogino
- a Department of Public Health , Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science , Okayama , Japan
| | - Kenjiro Nagaoka
- a Department of Public Health , Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science , Okayama , Japan
| | - Tatsuo Ito
- a Department of Public Health , Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science , Okayama , Japan
| | - Kei Takemoto
- a Department of Public Health , Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science , Okayama , Japan
| | - Tomoaki Okuda
- b Department of Applied Chemistry, Faculty of Science and Technology , Keio University , Yokohama , Japan
| | - Shoji F Nakayama
- c Center for Environmental Health Sciences, Integrated Health Risk Assessment Section , Tsukuba , Japan
| | - Noriyoshi Ogino
- a Department of Public Health , Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science , Okayama , Japan.,d Third Department of Internal Medicine School of Medicine , University of Occupational and Environmental Health , Kitakyushu , Japan
| | - Yuka Seki
- a Department of Public Health , Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science , Okayama , Japan
| | - Hiroki Hamada
- e Department of Life Science, Faculty of Science, Laboratory of Food Preventive Medicine , Okayama University of Science , Okayama , Japan
| | - Shogo Takashiba
- f Department of Patho-Physiology, Division of Periodontal Science , Okayama University Graduate School of Medicine , Okayama , Japan
| | - Yoshihisa Fujikura
- g Department of Anatomy, Biology and Medicine, Division of Morphological Analysis, Faculty of Medicine , Oita University , Oita , Japan
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16
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Fujita K, Kaburagi H, Nimura A, Miyamoto T, Wakabayashi Y, Seki Y, Aoyama H, Shimura H, Kato R, Okawa A. Correction to: Lower grip strength and dynamic body balance in women with distal radial fractures. Osteoporos Int 2019; 30:697. [PMID: 30806728 PMCID: PMC6828462 DOI: 10.1007/s00198-019-04860-8] [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: 10/27/2022]
Abstract
The article Lower grip strength and dynamic body balance in women with distal radial fractures, written by. K. Fujita, H. Kaburagi, A. Nimura, T. Miyamoto, Y. Wakabayashi, Y. Seki, H. Aoyama, H. Shimura, R. Kato, A. Okawa was originally published electronically on the publisher's internet portal.
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Affiliation(s)
- K Fujita
- Department of Orthopaedic and Spinal Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
| | - H Kaburagi
- Department of Orthopaedic and Spinal Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - A Nimura
- Department of Functional Joint Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - T Miyamoto
- Department of Functional Joint Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Y Wakabayashi
- Department of Orthopedic Surgery, Yokohama City Minato Red Cross Hospital, Kanagawa, Japan
| | - Y Seki
- Department of Orthopedic Surgery, Suwa Central Hospital, Nagano, Japan
| | - H Aoyama
- Department of Orthopedic Surgery, JAToride Medical Center, Ibaraki, Japan
| | - H Shimura
- Department of Orthopedic Surgery, Tokyo Bay Urayasu Ichikawa Medical Center, Chiba, Japan
| | - R Kato
- JA Kyosai Research Institute, Tokyo, Japan
| | - A Okawa
- Department of Orthopaedic and Spinal Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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17
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Seki Y, Aoki T, Maehara H, Shirasawa S. Distal locking screw length for volar locking plate fixation of distal radius fractures: Postoperative stability of full-length unicortical versus shorter screws. Hand Surg Rehabil 2018; 38:28-33. [PMID: 30509732 DOI: 10.1016/j.hansur.2018.10.246] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 09/29/2018] [Accepted: 10/17/2018] [Indexed: 11/28/2022]
Abstract
We compared post-operative distal radius fracture (DRF) displacement after volar locking plate fixation using full-length unicortical and shorter-length distal locking screws. In this non-inferiority, retrospective cohort study, DRFs treated with volar locking plate fixation were evaluated on X-rays. In the full-length group, volar locking plate fixation was performed with full-length unicortical distal locking screws. In the shorter-length group, the distal locking screws were planned pre-operatively to be approximately 75% of the distal radius depth based on the lunate depth, and the same depth was drilled. Three radiographic parameters - ulnar variance, volar tilt, and radial inclination - were measured intra-operatively and at the final follow-up. The displacements were compared between the two groups. Each group contained 34 fractures. The mean ulnar variance between the two periods increased 1.1 mm in the full-length group and 1.3 mm in the shorter group (mean difference, 0.2 mm; 90% confidence interval, -0.3 to 0.6). The shorter group was not significantly inferior to the full-length one. Volar tilt increased 0.6° in the full-length group and -0.1° in the shorter group, while the radial inclination increased 0.1° in the full-length group and 0.2° in the shorter one. The differences in the increases were not significant. The post-operative DRF stability of 75%-length distal locking screws was not inferior to that of full-length unicortical screws. To prevent extensor pollicis longus tendon rupture, shorter distal locking screws and the same drilling depth may be preferable for volar locking plate fixation.
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Affiliation(s)
- Y Seki
- Department of Orthopedic Surgery, Suwa Central Hospital, 4300 3918503 Tamagawa, Chino, Nagano, Japan.
| | - T Aoki
- Department of Healthcare Epidemiology, School of Public Health in the Graduate School of Medicine, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto 6068501, Japan
| | - H Maehara
- Department of Orthopedic Surgery, Suwa Central Hospital, 4300 3918503 Tamagawa, Chino, Nagano, Japan
| | - S Shirasawa
- Department of Orthopedic Surgery, Suwa Central Hospital, 4300 3918503 Tamagawa, Chino, Nagano, Japan
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18
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Chan WK, Treeprasertsuk S, Imajo K, Nakajima A, Seki Y, Kasama K, Kakizaki S, Fan JG, Song MJ, Yoon SK, Dan YY, Lesmana L, Ho KY, Goh KL, Wong VWS. Clinical features and treatment of nonalcoholic fatty liver disease across the Asia Pacific region-the GO ASIA initiative. Aliment Pharmacol Ther 2018; 47:816-825. [PMID: 29333610 DOI: 10.1111/apt.14506] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Revised: 08/06/2017] [Accepted: 12/16/2017] [Indexed: 12/17/2022]
Abstract
BACKGROUND The Gut and Obesity Asia (GO ASIA) workgroup was formed to study the relationships between obesity and gastrointestinal diseases in the Asia Pacific region. AIM To study factors associated with nonalcoholic steatohepatitis (NASH) and advanced fibrosis, and medical treatment of biopsy-proven nonalcoholic fatty liver disease (NAFLD) patients. METHODS Retrospective study of biopsy-proven NAFLD patients from centres in the GO ASIA Workgroup. Independent factors associated with NASH and with advanced fibrosis on binary logistic regression analyses in a training cohort were used for the development of their corresponding risk score, which were validated in a validation cohort. RESULTS We included 1008 patients from nine centres across eight countries (NASH 62.9%, advanced fibrosis 17.2%). Independent predictors of NASH were body mass index ≥30 kg/m2 , diabetes mellitus, dyslipidaemia, alanine aminotransferase ≥88 U/L and aspartate aminotransferase ≥38 U/L, constituting the Asia Pacific NASH risk score. A high score has a positive predictive value of 80%-83% for NASH. Independent predictors of advanced fibrosis were age ≥55 years, diabetes mellitus and platelet count <150 × 109 /L, constituting the Asia-Pacific NAFLD advanced fibrosis risk score. A low score has a negative predictive value of 95%-96% for advanced fibrosis. Only 1.7% of patients were referred for structured lifestyle program, 4.2% were on vitamin E, and 2.4% were on pioglitazone. CONCLUSIONS More severe liver disease can be suspected or ruled out based on factors identified in this study. Utilisation of structured lifestyle program, vitamin E and pioglitazone was limited despite this being a cohort of biopsy-proven NAFLD patients with majority of patients having NASH.
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Affiliation(s)
| | | | - K Imajo
- Yokohama City University Graduate School of Medicine, Japan
| | - A Nakajima
- Yokohama City University Graduate School of Medicine, Japan
| | - Y Seki
- Yotsuya Medical Cube, Japan
| | | | - S Kakizaki
- Gunma University Graduate School of Medicine, Japan
| | - J-G Fan
- Shanghai Jiaotong University School of Medicine, China
| | - M J Song
- The Catholic University Korea, Korea
| | - S K Yoon
- The Catholic University Korea, Korea
| | - Y-Y Dan
- National University of Singapore, Singapore
| | - L Lesmana
- Medistra Hospital, Jakarta, Indonesia
| | - K-Y Ho
- National University of Singapore, Singapore
| | - K-L Goh
- University of Malaya, Malaysia
| | - V W-S Wong
- The Chinese University of Hong Kong, Hong Kong, China
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Affiliation(s)
- E.T. Cheng
- TSI Research, Inc. 225 Stevens Avenue Solana Beach, CA USA 92075
| | - P. Rocco
- European Commission - JRC Institute for Advanced Materials T.P.800, I-21020 Ispra (VA), Italy
| | - M. Zucchetti
- European Commission - JRC Institute for Advanced Materials T.P.800, I-21020 Ispra (VA), Italy
- Polytechnic of Torino, Energetics Department, C.so Duca degli Abruzzi 24, I-10129 Torino, Italy
| | - Y. Seki
- JAERI Mukouyama 801-1 Naka-machi, Naka-gun Ibaraki-ken 311-0102, Japan
| | - T. Tabara
- Sumitomo Atomic Energy Industries, Ltd., 2-10-14, Ryogoku, Sumidaku, Tokyo, 130 Japan
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20
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Kamiyanagi A, Sumita Y, Ino S, Chikai M, Nakane A, Tohara H, Minakuchi S, Seki Y, Endo H, Taniguchi H. Evaluation of swallowing ability using swallowing sounds in maxillectomy patients. J Oral Rehabil 2017; 45:126-131. [PMID: 29197111 DOI: 10.1111/joor.12593] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/28/2017] [Indexed: 11/28/2022]
Abstract
Maxillectomy for oral tumours often results in debilitating oral hypofunction, which markedly decreases quality of life. Dysphagia, in particular, is one of the most serious problems following maxillectomy. This study used swallowing sounds as a simple evaluation method to evaluate swallowing ability in maxillectomy patients with and without their obturator prosthesis placed. Twenty-seven maxillectomy patients (15 men, 12 women; mean age 66.0 ± 12.1 years) and 30 healthy controls (14 men, 16 women; mean age 44.9 ± 21.3 years) were recruited for this study. Participants were asked to swallow 4 mL of water, and swallowing sounds were recorded using a throat microphone. Duration of the acoustic signal and duration of peak intensity (DPI) were measured. Duration of peak intensity was significantly longer in maxillectomy patients without their obturator than with it (P < .05) and was significantly longer in maxillectomy patients without their obturator than in healthy controls (P < .025 after Bonferroni correction). With the obturator placed, DPI was significantly longer in maxillectomy patients who had undergone soft palate resection than in those who had not (P < .05). These results suggest swallowing ability in maxillectomy patients could be improved by wearing an obturator prosthesis, particularly during the oral stage. However, it is difficult to improve the oral stage of swallowing in patients who have undergone soft palate resection even with obturator placement.
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Affiliation(s)
- A Kamiyanagi
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Y Sumita
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - S Ino
- Human Informatics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - M Chikai
- Human Informatics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - A Nakane
- Department of Gerodontology and Oral Rehabilitation, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - H Tohara
- Department of Gerodontology and Oral Rehabilitation, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - S Minakuchi
- Department of Gerodontology and Oral Rehabilitation, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Y Seki
- Human Informatics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - H Endo
- Human Informatics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - H Taniguchi
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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21
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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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Tone T, Fujisawa N, Seki Y, Iida H, Tachikawa K, Sugihara M, Minato A, Nishio S, Yamamoto T, Kitamura K, Ueda K, Saito S, Shimada R, Matsuda Y, Naruse Y, Shimamoto S, Tamura S, Yoshikawa M, Tomabechi K. Conceptual Design of Fusion Experimental Reactor(FER). ACTA ACUST UNITED AC 2017. [DOI: 10.13182/fst83-a22924] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [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)
- T. Tone
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - N. Fujisawa
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - Y. Seki
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - H. Iida
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - K. Tachikawa
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - M. Sugihara
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - A. Minato
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - S. Nishio
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - T. Yamamoto
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - K. Kitamura
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - K. Ueda
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - S. Saito
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - R. Shimada
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - Y. Matsuda
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - Y. Naruse
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - S. Shimamoto
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - S. Tamura
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - M. Yoshikawa
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - K. Tomabechi
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
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Kobyashi S, Kawakami A, Seki Y, Rokkaku R. A LONGITUDINAL EDUCATIONAL APPROACH TO IMPROVING END-OF-LIFE CARE IN JAPANESE NURSING HOMES. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.259] [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: 11/13/2022] Open
Affiliation(s)
- S. Kobyashi
- Department of Nursing, School of Health Science, Tokyo university of Technology, Tokyo, Japan,
| | | | - Y. Seki
- Dokkyo Medical University, Mibu-machi, Japan,
| | - R. Rokkaku
- Dokkyo Medical University, Mibu-machi, Japan,
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Seki Y, Kakinuma A, Kuchii T, Ohira K. Why chronically ill children face challenges in regular classrooms: perspectives from nursing teachers in Japan. Child Care Health Dev 2017; 43:281-288. [PMID: 27781298 DOI: 10.1111/cch.12423] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 09/12/2016] [Accepted: 10/02/2016] [Indexed: 11/29/2022]
Abstract
BACKGROUND Chronically ill children are increasingly expected to join their peers in regular classrooms. However, sometimes schools do not provide adequate assistance. This study explores nursing teachers' thoughts and experiences on integrating such students into regular classrooms in Japan. METHODS We analysed 79 essays written by nursing teachers collectively titled 'The challenges of having chronically ill children in regular classrooms'. We conducted a qualitative study using Kinoshita's Modified Grounded Theory Approach. RESULTS Nursing teachers identified three main obstacles: insufficient resources to support chronically ill students, parents not playing a supporting role in aiding them at school and a regular classroom not being suitable for them. However, collaborating with the children's medical staff proved successful at integrating them into regular classrooms. CONCLUSIONS Given these obstacles, it seems very difficult for nursing teachers to lead the way toward establishing cooperative support systems for the children. Instructions from medical staff could empower teachers to set up such systems.
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Affiliation(s)
- Y Seki
- Faculty of Education, Saitama University, Saitama City, Japan
| | - A Kakinuma
- Social Welfare Corporation Habataki Welfare Project, Tokyo, Japan
| | - T Kuchii
- Social Welfare Corporation Habataki Welfare Project, Tokyo, Japan
| | - K Ohira
- Social Welfare Corporation Habataki Welfare Project, Tokyo, Japan
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Tada T, Seki Y, Kameyama Y, Kikkawa Y, Wada K. Characterization and application of newly developed polymorphic microsatellite markers in the Ezo red fox (Vulpes vulpes schrencki). Genet Mol Res 2016; 15:gmr-15-04-gmr.15049104. [PMID: 28002597 DOI: 10.4238/gmr15049104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The Ezo red fox (Vulpes vulpes schrencki), a subspecies endemic to Hokkaido island, Japan, is a known host species for the tapeworm Echinococcus multilocularis. To develop tools for molecular ecological studies, we isolated 28 microsatellite regions from the genome of Ezo red fox, and developed 18 polymorphic microsatellite markers. These markers were characterized using 7 individuals and 22 fecal samples of the Ezo red fox. The number of alleles for these markers ranged from 1 to 7, and the observed heterozygosity, estimated on the basis of the genotypes of 7 individuals, ranged from 0.29 to 1.00. All markers, except DvNok5, were in Hardy-Weinberg equilibrium (P > 0.05), and no linkage disequilibrium was detected among these loci, except between DvNok14 and DvNok28 (P = 0.01). Moreover, six microsatellite loci were successfully genotyped using feces-derived DNA from the Ezo red fox. The markers developed in our study might serve as a useful tool for molecular ecological studies of the Ezo red fox.
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Affiliation(s)
- T Tada
- Graduate School of Bioindustry, Tokyo University of Agriculture, Abashiri, Hokkaido, Japan
| | - Y Seki
- Mammalian Genetics Project, Department of Genome Medicine, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Y Kameyama
- Graduate School of Bioindustry, Tokyo University of Agriculture, Abashiri, Hokkaido, Japan
| | - Y Kikkawa
- Mammalian Genetics Project, Department of Genome Medicine, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - K Wada
- Graduate School of Bioindustry, Tokyo University of Agriculture, Abashiri, Hokkaido, Japan .,Mammalian Genetics Project, Department of Genome Medicine, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
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Seki Y, Fujiwara Y, Kohno T, Goto Y, Horinouchi H, Kanda S, Nokihara H, Yamamoto N, Kuwano K, Ohe Y. Analysis of circulating cell-free DNA in plasma shows a higher detection rate of EGFR mutations in patients with extrathoracic disease progression. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw393.02] [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: 11/14/2022] Open
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Nunokawa K, Seki Y, Ino S, Doi K. Judging hardness of an object from the sounds of tapping created by a white cane. Annu Int Conf IEEE Eng Med Biol Soc 2015; 2014:5876-9. [PMID: 25571333 DOI: 10.1109/embc.2014.6944965] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The white cane plays a vital role in the independent mobility support of the visually impaired. Allowing the recognition of target attributes through the contact of a white cane is an important function. We have conducted research to obtain fundamental knowledge concerning the exploration methods used to perceive the hardness of an object through contact with a white cane. This research has allowed us to examine methods that enhance accuracy in the perception of objects as well as the materials and structures of a white cane. Previous research suggest considering the roles of both auditory and tactile information from the white cane in determining objects' hardness is necessary. This experimental study examined the ability of people to perceive the hardness of an object solely through the tapping sounds of a white cane (i.e., auditory information) using a method of magnitude estimation. Two types of sounds were used to estimate hardness: 1) the playback of recorded tapping sounds and 2) the sounds produced on-site by tapping. Three types of handgrips were used to create different sounds of tapping on an object with a cane. The participants of this experiment were five sighted university students wearing eye masks and two totally blind students who walk independently with a white cane. The results showed that both sighted university students and totally blind participants were able to accurately judge the hardness of an object solely by using auditory information from a white cane. For the blind participants, different handgrips significantly influenced the accuracy of their estimation of an object's hardness.
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Makino T, Mizawa M, Seki Y, Hayashi M, Shimizu T. Decreased filaggrin-2 expression in the epidermis in a case of pityriasis rotunda. Clin Exp Dermatol 2015; 41:215-7. [DOI: 10.1111/ced.12716] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/12/2015] [Indexed: 11/29/2022]
Affiliation(s)
- T. Makino
- Department of Dermatology; Graduate School of Medicine and Pharmaceutical Sciences; University of Toyama; Sugitani 2630 Toyama 930-0194 Japan
| | - M. Mizawa
- Department of Dermatology; Graduate School of Medicine and Pharmaceutical Sciences; University of Toyama; Sugitani 2630 Toyama 930-0194 Japan
| | - Y. Seki
- Department of Dermatology; Graduate School of Medicine and Pharmaceutical Sciences; University of Toyama; Sugitani 2630 Toyama 930-0194 Japan
| | - M. Hayashi
- Department of Dermatology; Graduate School of Medicine and Pharmaceutical Sciences; University of Toyama; Sugitani 2630 Toyama 930-0194 Japan
| | - T. Shimizu
- Department of Dermatology; Graduate School of Medicine and Pharmaceutical Sciences; University of Toyama; Sugitani 2630 Toyama 930-0194 Japan
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Takahashi S, Seki Y, Uchida A, Nakayama K, Satoh H. Are tyrosine residues involved in the photoconversion of the water-soluble chlorophyll-binding protein of Chenopodium album? Plant Biol (Stuttg) 2015; 17:632-638. [PMID: 25287526 DOI: 10.1111/plb.12274] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 09/29/2014] [Indexed: 06/03/2023]
Abstract
Non-photosynthetic and hydrophilic chlorophyll (Chl) proteins, called water-soluble Chl-binding proteins (WSCPs), are distributed in various species of Chenopodiaceae, Amaranthaceae, Polygonaceae and Brassicaceae. Based on their photoconvertibility, WSCPs are categorised into two classes: Class I (photoconvertible) and Class II (non-photoconvertible). Chenopodium album WSCP (CaWSCP; Class I) is able to convert the chlorin skeleton of Chl a into a bacteriochlorin-like skeleton under light in the presence of molecular oxygen. Potassium iodide (KI) is a strong inhibitor of the photoconversion. Because KI attacks tyrosine residues in proteins, tyrosine residues in CaWSCP are considered to be important amino acid residues for the photoconversion. Recently, we identified the gene encoding CaWSCP and found that the mature region of CaWSCP contained four tyrosine residues: Tyr13, Tyr14, Tyr87 and Tyr134. To gain insight into the effect of the tyrosine residues on the photoconversion, we constructed 15 mutant proteins (Y13A, Y14A, Y87A, Y134A, Y13-14A, Y13-87A, Y13-134A, Y14-87A, Y14-134A, Y87-134A, Y13-14-87A, Y13-14-134A, Y13-87-134A, Y14-87-134A and Y13-14-87-134A) using site-directed mutagenesis. Amazingly, all the mutant proteins retained not only chlorophyll-binding activity, but also photoconvertibility. Furthermore, we found that KI strongly inhibited the photoconversion of Y13-14-87-134A. These findings indicated that the four tyrosine residues are not essential for the photoconversion.
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Affiliation(s)
- S Takahashi
- Department of Biomolecular Science, Toho University, Funabashi, Chiba, Japan
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Seki Y, Kakinuma A, Kuchii T, Ohira K. Disclosing haemophilia at school: strategies employed by mothers of children with haemophilia in Japan. Haemophilia 2015; 21:629-35. [PMID: 25854899 DOI: 10.1111/hae.12674] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/13/2015] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Most children with haemophilia in Japan study in mainstream schools. However, many mothers have difficulty deciding whether to inform teachers of their child's haemophilia because of the accompanying potential discrimination and prejudice, particularly after the press coverage on the HIV scandal in the 1980s. AIMS We therefore aim to explore and describe disclosure strategies of mothers of children with haemophilia. METHODS A qualitative study was conducted using the modified grounded theory approach to explore disclosure strategies of mothers of children with haemophilia. Semi-structured interviews were conducted with 19 selected mothers (12 children were HIV positive and 7 were HIV-negative). RESULTS In the pre-HIV/AIDS crisis period, the kind of strategy employed - full disclosure, conditional full disclosure and partial disclosure - depended on the extent of mothers' fears about mainstream schools refusing admission because of their child's haemophilia. After the HIV/AIDS crisis in the 1980s in Japan, the three categories of strategies employed by mothers of children with haemophilia were limited disclosure, non-disclosure and full disclosure. These depended on mothers' expectations of discrimination towards their child because of the social stigma around haemophilia and being HIV-positive. CONCLUSION For children with haemophilia to feel safe attending school, public schools must establish care management and anti-discrimination systems for children with chronic diseases, thus assuring parents of their children's welfare at school.
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Affiliation(s)
- Y Seki
- Faculty of Education, Saitama University, Saitama, Japan
| | - A Kakinuma
- Social Welfare Corporation Habataki Welfare Project, Tokyo, Japan
| | - T Kuchii
- Social Welfare Corporation Habataki Welfare Project, Tokyo, Japan
| | - K Ohira
- Social Welfare Corporation Habataki Welfare Project, Tokyo, Japan
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Wada H, Okamoto K, Iba T, Kushimoto S, Kawasugi K, Gando S, Madoiwa S, Uchiyama T, Mayumi T, Seki Y. Addition of recommendations for the use of recombinant human thrombomodulin to the "Expert consensus for the treatment of disseminated intravascular coagulation in Japan". Thromb Res 2014; 134:924-5. [PMID: 25135793 DOI: 10.1016/j.thromres.2014.07.033] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 06/28/2014] [Accepted: 07/30/2014] [Indexed: 11/17/2022]
Affiliation(s)
- H Wada
- Department of Molecular and Laboratory Medicine, Mie University School of Medicine, Tsu, Japan.
| | - K Okamoto
- Department of Emergency Medicine, Juntendo University, Tokyo, Japan
| | - T Iba
- Division of Emergency and Critical Care Medicine, Tohoku University Graduate School of Medicine, Japan
| | - S Kushimoto
- Department of Internal Medicine, Teikyo University School of Medicine, Itabashi, Japan
| | - K Kawasugi
- Department of Anesthesiology and Critical Care Medicine, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - S Gando
- Research Division of Cell and Molecular Medicine, Center for Molecular Medicine, Jichi Medical University School of Medicine, Tochigi, Japan
| | - S Madoiwa
- Department of Internal Medicine, National Hospital Organization Takasaki General Medical Center, Takasaki, Japan
| | - T Uchiyama
- Department of Emergency Medicine, University of Occupational and Environmental Health School of Medicine, Kitakyushu, Japan
| | - T Mayumi
- Department of Internal Medicine, Shibata Hospital-Niigata Prefectural Hospital, Shibata, Japan
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Shimomura M, Hasegawa S, Seki Y, Fukano R, Hotta N, Ichiyama T. Intravenous immunoglobulin does not increase FcγRIIB expression levels on monocytes in children with immune thrombocytopenia. Clin Exp Immunol 2014. [DOI: 10.1111/cei.12384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Sakairi M, Sasaki R, Kaneko A, Seki Y, Nagasawa D. Evaluation of metal cation effects on galvanic corrosion behavior of the A5052 aluminum alloy in low chloride ion containing solutions by electrochemical noise impedance. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.02.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kato TA, Yamauchi Y, Horikawa H, Monji A, Mizoguchi Y, Seki Y, Hayakawa K, Utsumi H, Kanba S. Neurotransmitters, psychotropic drugs and microglia: clinical implications for psychiatry. Curr Med Chem 2014; 20:331-44. [PMID: 23157624 DOI: 10.2174/0929867311320030003] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2012] [Revised: 09/13/2012] [Accepted: 09/27/2012] [Indexed: 11/22/2022]
Abstract
Psychiatric disorders have long and dominantly been regarded to be induced by disturbances of neuronal networks including synapses and neurotransmitters. Thus, the effects of psychotropic drugs such as antipsychotics and antidepressants have been understood to modulate synaptic regulation via receptors and transporters of neurotransmitters such as dopamine and serotonin. Recently, microglia, immunological/inflammatory cells in the brain, have been indicated to have positive links to psychiatric disorders. Positron emission tomography (PET) imaging and postmortem studies have revealed microglial activation in the brain of neuropsychiatric disorders such as schizophrenia, depression and autism. Animal models of neuropsychiatric disorders have revealed the underlying microglial pathologies. In addition, various psychotropic drugs have been suggested to have direct effects on microglia. Until now, the relationship between microglia, neurotransmitters and psychiatric disorders has not been well understood. Therefore, in this review, at first, we summarize recent findings of interaction between microglia and neurotransmitters such as dopamine, serotonin, norepinephrine, acetylcholine and glutamate. Next, we introduce up-to-date knowledge of the effects of psychotropic drugs such as antipsychotics, antidepressants and antiepileptics on microglial modulation. Finally, we propose the possibility that modulating microglia may be a key target in the treatment of various psychiatric disorders. Further investigations and clinical trials should be conducted to clarify this perspective, using animal in vivo studies and imaging studies with human subjects.
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Affiliation(s)
- T A Kato
- Department of Neuropsychiatry, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan.
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Seki Y, Nitta K, Kaneko Y. Observation of polyphosphate bodies and DNA during the cell division cycle of Synechococcus elongatus PCC 7942. Plant Biol (Stuttg) 2014; 16:258-263. [PMID: 23574545 DOI: 10.1111/plb.12008] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2012] [Accepted: 12/21/2012] [Indexed: 06/02/2023]
Abstract
Although most cyanobacterial cells contain prominent polyphosphate bodies in the central cytoplasmic area enclosed by the peripheral thylakoid membranes, their roles are not fully understood. Storing phosphate for nucleotide production might be one of their important roles in survival of the cells. As a step towards identifying a possible contribution of the polyphosphate bodies to DNA synthesis, the relationship between polyphosphate bodies and DNA throughout cell division cycle of Synechococcus elongatus PCC 7942 cells cultured under light/dark cycles was investigated with light and electron microscopy. During the dark period, the average size of polyphosphate bodies increased gradually without significant change in their number and distribution. However, during the light period, the number of polyphosphate bodies increased, while the size of each polyphosphate body decreased and cells elongated until the end of the light period, when most cells divided. The ratio of the content of polyphosphate bodies to cell length increased gradually during the dark period and decreased during the light period. Hoechst 33342-stained DNA appeared diffuse during the dark period, but in the light period it became condensed and eventually formed a wavy, rope-like structure prior to cell division. Close association between fibres containing DNA and polyphosphate bodies was demonstrated by TEM using DNA-specific staining and BrdU labelling. These regular coordinated changes of polyphosphate bodies and DNA shape during the cell division cycle, together with their intimate interaction, imply a role of polyphosphate bodies in supplying material for DNA.
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Affiliation(s)
- Y Seki
- Graduate School of Science and Engineering, Saitama University, Saitama, Kanagawa, Japan
| | - K Nitta
- Analysis Technology Center, Research and Developmental Management Headquarters, Fuji Photo Film Co. Ltd., Minamiashigara, Kanagawa, Japan
| | - Y Kaneko
- Biology Section in the Faculty of Education; Graduate School of Science and Engineering; Institute for Environmental Science and Technology, Saitama University, Saitama, Japan
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Ando T, Morimoto S, Mori F, Watanabe D, Seki Y, Niiyama M, Yoshida N, Ono M, Miki N, Ichihara A. CVD Therapy for Unresectable Pheochromocytoma. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt460.147] [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: 11/15/2022] Open
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Abstract
PURPOSE We outline the development of a reliable model of obstructive uropathy in fetal lambs highlighting our understanding of the critical time points for interventions and the variability of any such model. We identify some discoveries that may have clinical implications. METHODS The model requires 60-day-gestation fetal lambs. In lambs, glomerulogenesis is complete by 90 days gestation. (Term is 145 days.) The ability to develop a reliable method of creating bladder outlet obstruction in females, ligating both the urethra and urachus was critical. The lambs are bred to an accuracy of ±24 h. RESULTS Creating the model at 50-60 days gestation, produces different expressions of renal dysplasia in groups of lambs undergoing identical interventions at the same stage of gestation. Early complete urethral obstruction can produce the Potter phenotype. An appropriately timed vesico-amniotic shunt preserves renal development, producing a shrunken, non-compliant bladder. Shunting the normal fetal bladder at 80 days gestation produces a similar bladder. Provision of a low-pressure valve in the shunt preserves bladder development and compliance. Using a high-pressure shunt produces results similar to non-shunted lambs. DISCUSSION We developed a reliable animal model for obstructive uropathy. Being alert to peripheral results can lead to new findings.
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Affiliation(s)
- K C Pringle
- Department of Obstetrics and Gynaecology, School of Medicine and Health Sciences, University of Otago, Wellington, P.O. Box 7343, Wellington South, 6242, Wellington, New Zealand,
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Otani K, Sakairi M, Sasaki R, Kaneko A, Seki Y, Nagasawa D. Effect of metal cations on corrosion behavior and surface film structure of the A3003 aluminum alloy in model tap waters. J Solid State Electrochem 2013. [DOI: 10.1007/s10008-013-2260-7] [Citation(s) in RCA: 17] [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: 11/29/2022]
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Sakairi M, Otani K, Kaneko A, Seki Y, Nagasawa D. Analysis of chemical compositions and morphology of surface films formed on 3003 aluminum alloy by immersion in different cation containing model tap waters. SURF INTERFACE ANAL 2013. [DOI: 10.1002/sia.5256] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- M. Sakairi
- Faculty of Engineering; Hokkaido University; Japan
| | - K. Otani
- Faculty of Engineering; Hokkaido University; Japan
| | - A. Kaneko
- Nikkei Research and Development Center; Nippon Light Metal Co. Ltd.; Japan
| | - Y. Seki
- Nikkei Research and Development Center; Nippon Light Metal Co. Ltd.; Japan
| | - D. Nagasawa
- Nikkei Research and Development Center; Nippon Light Metal Co. Ltd.; Japan
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A. Kato T, Yamauchi Y, Horikawa H, Monji A, Mizoguchi Y, Seki Y, Hayakawa K, Utsumi H, Kanba S. Neurotransmitters, Psychotropic Drugs and Microglia: Clinical Implications for Psychiatry. Curr Med Chem 2013. [DOI: 10.2174/092986713804870800] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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41
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Yamamoto N, Nokihara H, Yamada Y, Asahina H, Shibata T, Tamura Y, Seki Y, Honda K, Tanabe Y, Wakui H, Tamura T. Phase I Study of Anti PD-1 Antibody Ono-4538 in Japanese Patients with Advanced Solid Tumors. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)31987-6] [Citation(s) in RCA: 3] [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: 11/30/2022] Open
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42
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Yamamoto N, Yamada Y, Nokihara H, Asahina H, Shibata T, Tamura Y, Seki Y, Honda K, Tanabe Y, Tamura T. Phase I Study of Ono-4538 (BMS-936558), An Anti PD-1 Antibody, in Japanese Patients with Advanced Solid Tumors. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)33018-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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43
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Shimomura M, Hasegawa S, Seki Y, Fukano R, Hotta N, Ichiyama T. Intravenous immunoglobulin does not increase FcγRIIB expression levels on monocytes in children with immune thrombocytopenia. Clin Exp Immunol 2012; 169:33-7. [PMID: 22670776 DOI: 10.1111/j.1365-2249.2012.04591.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Intravenous immunoglobulin (IVIG) produces a rapid and prolonged increase in the platelet counts of children with immune thrombocytopenia (ITP). The mechanism of IVIG efficacy in a murine model of ITP has been reported to operate through an IVIG-mediated increase in the expression of the inhibitory Fc receptor FcγRIIB(CD32B) on splenic macrophages. This investigation examined whether IVIG administration results in a similar increase in FcγRIIB expression on peripheral blood CD14(+) monocytes in 20 children with ITP. FcγRIIB expression on peripheral blood monocytes was measured by flow cytometry in ITP patients, before and after IVIG therapy, as well as in control subjects. Peripheral blood monocytes were labelled with fluorescent-specific antibodies. There were no significant differences in the absolute number of [corrected] CD14(+) CD32B(+) monocytes, and [corrected] the percentages of CD14(+) CD32B(+) cells in mononuclear cells or monocytes. [corrected]. We suggest that IVIG does not increase FcγRIIB expression in peripheral blood monocytes in children with ITP.
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Affiliation(s)
- M Shimomura
- Department of Pediatrics, Yamaguchi University Graduate School of Medicine, Ube, Japan.
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Seki Y, Yasuda A, Gotou M, Sugiyama T, Yamada K. [Posterior mediastinal hemangioma with extramedullary haematopoieisis]. Kyobu Geka 2012; 65:380-383. [PMID: 22569495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We report a very rare coexistence of posterior mediastinal hemangioma with extramedullary haematopoieisis. A 69-year-old woman was detected to have an abnormal mass on the chest radiograph during a routine medical examination. No disorders were found by hematologic exams before and after surgery. Chest computed tomography (CT) revealed a well circumscribed posterior mediastinal tumor measured 32×11 mm in diameter, located on paravertebral space. The most likely diagnosis was a benign neurogenic tumor and we were planning to remove this tumor by video-assisted thoracic surgery (VATS) via a right transthoracic approach. Thoracoscopic finding revealed that this tumor was brownish and soft, such as hemangioma. Initially, incisional biopsy was done to obtain definitive diagnosis. Since intraoperative microscopic examination of the biopsy specimen revealed extramedullary haematopoieisis, we obtained another larger samples and finished the operation. Interestingly, the postoperative final histological diagnosis was mediastinal hemangioma with extramedullary haematopoieis.
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Affiliation(s)
- Y Seki
- Department of Surgery, Nagoya Medical Center, Japan
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45
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Murakami H, Tamura T, Takahashi T, Nokihara H, Naito T, Nakamura Y, Nishio K, Seki Y, Sarashina A, Shahidi M, Yamamoto N. Phase I study of continuous afatinib (BIBW 2992) in patients with advanced non-small cell lung cancer after prior chemotherapy/erlotinib/gefitinib (LUX-Lung 4). Cancer Chemother Pharmacol 2011; 69:891-9. [PMID: 22071596 DOI: 10.1007/s00280-011-1738-1] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Accepted: 08/31/2011] [Indexed: 11/30/2022]
Abstract
PURPOSE This Phase I study determined the maximum-tolerated dose (MTD) of afatinib (Afatinib is an investigational compound and its safety and efficacy have not yet been established) (BIBW 2992; trade name not yet approved by FDA), an irreversible inhibitor of epidermal growth factor receptor (EGFR)/human epidermal growth factor receptor (HER)1 and 2, up to a dose of 50 mg/day in advanced non-small cell lung cancer (NSCLC), to establish the recommended dose for Phase II. METHODS Patients with advanced NSCLC who had received prior platinum-doublet chemotherapy and/or erlotinib/gefitinib therapy, or who were ineligible for, or not amenable to, treatment with established therapies, received oral afatinib once daily. The MTD was determined based on dose-limiting toxicities (DLTs); other assessments included safety, pharmacokinetic profile, antitumour activity according to response evaluation criteria in solid tumours and EGFR/HER1 mutation analysis where possible. RESULTS Twelve evaluable patients were treated at doses of 20-50 mg/day. One DLT was observed at 50 mg/day in Course 1 (Grade 3 mucositis). The most frequent drug-related adverse events were diarrhoea, dry skin, stomatitis, rash, paronychia and anorexia; most were Grade 1 or 2. Six out of 12 patients had tumour size reductions; durable stable disease was achieved in three patients including one with EGFR/HER1 exon 19 and T790 M mutations. Peak plasma concentrations of afatinib were reached 3-4 h after administration and declined with a half-life of 30-40 h. Afatinib 50 mg/day was well tolerated with an acceptable safety profile during Phase I. CONCLUSION Recommended dose for Phase II was defined as 50 mg/day for Japanese patients; the same as for non-Japanese patients.
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Affiliation(s)
- H Murakami
- Division of Thoracic Oncology, Shizuoka Cancer Center, 1007 Shimonagakubo Nagaizumi-cho Sunto-gun, Shizuoka 411-8777, Japan
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Seki Y, Yokohama M, Ishikawa D, Ikehara N, Wada K, Nomura K, Amano T, Kikkawa Y. Development and characterization of 260 microsatellite loci in the domestic goat, Capra hircus. Anim Genet 2011; 43:365-6. [PMID: 22486517 DOI: 10.1111/j.1365-2052.2011.02262.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Y Seki
- Department of Bioproduction, Tokyo University of Agriculture, Hokkaido, Japan
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Mizoguchi Y, Monji A, A. Kato T, Horikawa H, Seki Y, Kasai M, Kanba S, Yamada S. Possible Role of BDNF-Induced Microglial Intracellular Ca 2+ Elevation in the Pathophysiology of Neuropsychiatric Disorders. Mini Rev Med Chem 2011; 11:575-81. [DOI: 10.2174/138955711795906932] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Accepted: 03/17/2011] [Indexed: 11/22/2022]
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48
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Kato TA, Monji A, Mizoguchi Y, Hashioka S, Horikawa H, Seki Y, Kasai M, Utsumi H, Kanba S. Anti-Inflammatory properties of antipsychotics via microglia modulations: are antipsychotics a 'fire extinguisher' in the brain of schizophrenia? Mini Rev Med Chem 2011; 11:565-74. [PMID: 21699487 DOI: 10.2174/138955711795906941] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2011] [Accepted: 03/30/2011] [Indexed: 11/22/2022]
Abstract
Schizophrenia is one of the most severe psychiatric diseases noted for its chronic and often debilitating processes; affecting approximately 1% of the world's population, while its etiology and therapeutic strategies still remain elusive. In the 1950s, the discovery of antipsychotic effects of haloperidol and chlorpromazine shifted the paradigm of schizophrenia. These drugs proved to be antagonists of dopamine D2 receptor (D2R), thus dopamine system dysfunction came to be hypothesized in the pathophysiology of schizophrenia, and D2R antagonism against dopamine neurons has been considered as the primary therapeutic target for schizophrenia. In addition, abnormalities of glutamatergic neurons have been indicated in the pathophysiology of schizophrenia. On the other hand, recent neuroimaging studies have shown that not only dementia but also schizophrenic patients have a significant volume reduction of some specific regions in the brain, which indicates that schizophrenia may involve some neurodegenerative process. Microglia, major sources of various inflammatory cytokines and free radicals such as superoxide and nitric oxide (NO) in the CNS, play a crucial role in a variety of neurodegenerative diseases such as dementia. Recent postmortem and positron emission computed tomography (PET) studies have indicated that activated microglia may be present in schizophrenic patients. Recent in vitro studies have suggested the anti-inflammatory effects of antipsychotics on microglial activation. In this article, we review the anti-inflammatory effects of antipsychotics on microglia, and propose a novel therapeutic hypothesis of schizophrenia from the perspective of microglial modulation.
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Affiliation(s)
- T A Kato
- Department of Neuropsychiatry, Graduate School of Medical Sciences, and Innovation Center for Medical Redox Navigation, Kyushu University, Fukuoka, Japan
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Yamamoto N, Katakami N, Atagi S, Hida T, Goto K, Horai T, Inoue A, Ichinose Y, Kobayashi K, Takeda K, Kiura K, Saka H, Tamura T, Okamoto I, Nogami N, Morinaga R, Nishio K, Seki Y, Lorence RM, Shahidi M. A phase II trial of afatinib (BIBW 2992) in patients (pts) with advanced non-small cell lung cancer previously treated with erlotinib (E) or gefitinib (G). J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.7524] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Nokihara H, Yamamoto N, Yamada Y, Asahina H, Shibata T, Seki Y, Tamura Y, Honda K, Misawa S, Tamura T. 415 A phase I study evaluating the safety profile and pharmacokinetics of CS-1008 (Tigatuzumab), humanized monoclonal antibody targeting death receptor 5 (DR5), in Japanese patients with advanced solid tumours. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)72122-4] [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: 10/18/2022] Open
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