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Terada K, Yoshizawa A, Sumiyoshi S, Rokutan-Kurata M, Nakajima N, Hamaji M, Sonobe M, Menju T, Date H, Haga H. Clinicopathological features of cytokeratin 5-positive pulmonary adenocarcinoma. Histopathology 2023; 82:439-453. [PMID: 36239561 DOI: 10.1111/his.14827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 10/07/2022] [Accepted: 10/10/2022] [Indexed: 01/20/2023]
Abstract
Cytokeratin 5 (CK5) is a marker for pulmonary squamous cell carcinoma; however, CK5 is sometimes present in pulmonary adenocarcinoma (ADC), and there is insufficient information regarding the clinicopathological features of CK5-positive ADC. We aimed to explore the clinicopathological characteristics of CK5-positive ADC using immunohistochemistry. We prepared the following two cohorts: a resected cohort containing 220 resected tumours for primarily studying the detailed morphological characteristics, and a tissue microarray (TMA) cohort containing 337 samples for investigating the associations of CK5 expression with other protein expressions, genetic and prognostic findings. CK5-positive ADC was defined to have ≥ 10% tumour cells and presence of CK5-positive tumour cells in the resected and TMA cohorts, respectively. CK5-positive ADCs were identified in 91 (16.3%) patients in the combined cohort. CK5-positive ADCs had male predominance (P = 0.012), smoking history (P = 0.001), higher stage (P < 0.001), histological high-grade components (P < 0.001), vascular invasion (P < 0.001), mucinous differentiation (P < 0.001), spread through airspaces (P < 0.001), EGFR wild-type (P < 0.001), KRAS mutations (P < 0.001), ALK rearrangement (P < 0.001) and ROS1 rearrangement (P = 0.002). In the resected cohort, more than half the CK5-positive ADCs (19 cases, 65.5%) showed mucinous differentiation; the remaining cases harboured high-grade components. In the TMA cohort, CK5-positive ADCs correlated with TTF-1 negativity (P = 0.002) and MUC5B, MUC5AC and HNF4alpha positivity (P < 0.001, 0.048, < 0.001). Further, CK5-positive ADCs had significantly lower disease-free and overall survival rates than CK5-negative ADCs (P < 0.001 for each). Additionally, multivariate analysis revealed that CK5 expression was an independent poor prognostic factor. CK5-positive ADCs showed aggressive clinical behaviour, with high-grade morphology and mucinous differentiation.
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Affiliation(s)
- K Terada
- Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan
| | - A Yoshizawa
- Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan
| | - S Sumiyoshi
- Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan.,Department of Diagnostic Pathology, Tenri Hospital, Nara, Japan
| | - M Rokutan-Kurata
- Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan
| | - N Nakajima
- Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan.,Department of Diagnostic Pathology, Toyooka Hospital, Hyogo, Japan
| | - M Hamaji
- Department of Thoracic Surgery, Kyoto University Hospital, Kyoto, Japan
| | - M Sonobe
- Department of Thoracic Surgery, Kyoto University Hospital, Kyoto, Japan.,Department of Thoracic Surgery, Osaka Red Cross Hospital, Osaka, Japan
| | - T Menju
- Department of Thoracic Surgery, Kyoto University Hospital, Kyoto, Japan
| | - H Date
- Department of Thoracic Surgery, Kyoto University Hospital, Kyoto, Japan
| | - H Haga
- Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan
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Terada K, Yoshizawa A, Sumiyoshi S, Rokutan‐Kurata M, Nakajima N, Hamaji M, Sonobe M, Menju T, Date H, Haga H. Cover Image. Histopathology 2023. [DOI: 10.1111/his.14861] [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: 01/19/2023]
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Kai Y, Mei H, Kawano H, Nakajima N, Takai A, Kumon M, Inoue A, Yamashita N. P-138 Transcriptomic signatures in trophectoderm and inner cell mass of human blastocysts with expected pregnancy rates. Hum Reprod 2022. [DOI: 10.1093/humrep/deac107.133] [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] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Study question
Is it possible to identify the molecular factors that contribute to the implantation potential of blastocysts?
Summary answer
Genes correlated with expected pregnancy rate in trophectoderm (TE) and inner cell mass (ICM) respectively were identified, and aneuploidy alone couldn’t predict the pregnancy expectation.
What is known already
The selection of suitable embryos for transfer is critical for achieving successful pregnancy outcomes in assisted reproductive technology (ART). Although pre-implantation genetic testing for aneuploidy (PGT-A) as well as morphological and chronological evaluation of embryos, have been conducted in clinical practice, they do not fully guarantee successful pregnancy. Recently, transcriptional events in early human embryonic development have been analyzed using RNA-sequencing (RNA-seq) and researchers are attempting to apply this information to ART.
Study design, size, duration
To determine the correlation between blastocyst evaluation and pregnancy rate, we retrospectively analyzed 1,890 cases underwent frozen-thawed blastocyst transfer from March 2018 to December 2020. A total of 13 blastocysts that were cryopreserved for clinical use between February 2011 and September 2018, then scheduled for disposal and with consented for research, were subjected to RNA-seq without distinguishing between conventional in vitro fertilization (c-IVF) and intracytoplasmic sperm injection (ICSI).
Participants/materials, setting, methods
Blastocysts were donated by infertile couples undergoing c-IVF or ICSI cycles at the Yamashita Shonan Yume Clinic with informed consent under ethical approval. TE and ICM cells were collected from blastocysts by using a micromanipulator and then subjected to RNA-seq. Gene expression analysis and digital karyotyping using RNA-seq were performed simultaneously for TE and ICM cells, respectively. One-way analysis of variance, chi-square test and Tukey's multiple comparison test were used for this study.
Main results and the role of chance
Blastocysts were classified into three groups to correlate with pregnancy rates based on the diameter of the blastocyst and the time to reach this size: those taking less than 130 h to reach a diameter of > 170 μm (Group 1, n = 676), those taking more than 140 h to reach a diameter of < 180 μm (Group 2, n = 158), and the rest (Group 3, n = 1,056). The pregnancy rates of Groups 1, 2 and 3 were 59.0%, 16.5%, and 34.2%, respectively (p < 0.01). Assessing the differences in overall transcripts correlated between Group 1 (n = 5), Group 2 (n = 4), and Group 3 (n = 4), 26 and 67 differentially expressed genes (DEGs) were identified in ICM and TE cells, respectively. Importantly, downregulated genes in TE of blastocysts with lower expectation of pregnancy included tight junction-related genes, such as CXADR, CLDN10, and ATP1B1, which were implicated in peri-implantation development. Digital karyotyping revealed karyotypic abnormalities and mosaicism in all groups with no common abnormalities observed, suggesting that aneuploidy alone cannot predict the pregnancy expectation.
Limitations, reasons for caution
Although 93 genes potentially related to implantation have been identified, it is still unclear how these genes are involved in implantation. In vitro implantation models using human embryos and artificial embryos currently under development are expected to contribute to the elucidation of the functions of these genes.
Wider implications of the findings
Our results provide reliable candidates for genes that could allow for non-invasive selection of high-quality blastocysts for ART and add to the knowledge base of transcriptional events in human peri-implantation development.
Trial registration number
not applicable
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Affiliation(s)
- Y Kai
- Yamashita Shonan Yume Clinic, Reproductive Medicine Research Center , Fujisawa, Japan
| | - H Mei
- RIKEN Center for Integrative Medical Sciences, Metabolic Epigenetics , Yokohama, Japan
| | - H Kawano
- Yamashita Shonan Yume Clinic, Reproductive Medicine Research Center , Fujisawa, Japan
| | - N Nakajima
- Yamashita Shonan Yume Clinic, Reproductive Medicine Research Center , Fujisawa, Japan
| | - A Takai
- Yamashita Shonan Yume Clinic, Reproductive Medicine Research Center , Fujisawa, Japan
| | - M Kumon
- RIKEN Center for Integrative Medical Sciences, Metabolic Epigenetics , Yokohama, Japan
| | - A Inoue
- RIKEN Center for Integrative Medical Sciences, Metabolic Epigenetics , Yokohama, Japan
| | - N Yamashita
- Yamashita Shonan Yume Clinic, Reproductive Medicine Research Center , Fujisawa, Japan
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Nakajima N, Kawano H, Takai A, Iimura Y, Mutsumi A, Azusa O, Chen M, Yamashita N. P-198 An analysis of the size of micro pronucleus in 2.1 pronuclear zygotes by using time-lapse images. Hum Reprod 2022. [DOI: 10.1093/humrep/deac107.191] [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] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Study question
Is it possible to determine the difference between 2.1 pronuclear (2.1PN) zygotes and tripronuclear (3PN) zygotes from time-lapse images?
Summary answer
A pronucleus of less than 15 μm in diameter can be considered the micro pronucleus (micro PN), and it is possible to classify 2.1PN zygotes.
What is known already
2.1PN zygotes are defined as zygotes with two pronuclei and one smaller pronucleus. Capalbo et al. (2017) reported that most of the 2.1PN-derived blastocysts were diploid by preimplantation genetic testing for aneuploidy (PGT-A), including single-nucleotide polymorphisms (SNPs) analysis. Thus, the treatment with 2.1 PN zygotes should be performed with chromosome testing. In Japan, where PGT-A is not available in principle, 2.1PN zygotes are rarely used in the embryo transfer. On the other hand, the size of the micro pronucleus in 2.1PN zygotes has not been clearly defined, and it is difficult to determine differences between 2.1PN and 3PN zygotes.
Study design, size, duration
The study was performed retrospectively on 2463 cycles of in vitro fertilization (IVF) conducted at our clinic between August 2020 and December 2021. A total of 3073 embryos underwent conventional-IVF (c-IVF) or intracytoplasmic sperm injection (ICSI) and were cultured in the time-lapse incubator, of which 221 zygotes with three pronuclei were used in the study.
Participants/materials, setting, methods
The diameter of the three PNs at one hour before syngamy from time-lapse images; 2.1 PN and 3PN zygotes were classified in the report by Capalbo et al. (2017). The age of the patients and the method of insemination between the groups were compared, and the diameter of the micro PN was analysed. Moreover, logistic regression analysis was performed to investigate the predictor of 2.1PN zygotes from the morphological characteristics of oocytes at ICSI.
Main results and the role of chance
The mean age of each patient was 42.9 years for 2.1PN zygotes and 39.8 years for 3PN zygotes, significantly higher for 2.1PN zygotes (P =0.003). On the other hand, when comparing the stage of oocyte maturation at the time of oocyte retrieval, there was no significant difference (P =0.749). According to the insemination method, the incidence of 2.1PN zygotes was significantly higher in ICSI (including rescue-ICSI) compared to c-IVF: 32.9% [95%CI: 22.5-44.6%] vs 2.4% [95%CI: 0.1-12.9%] (P <0.001). In terms of ICSI-derived zygotes, the mean age was also significantly higher for 2.1PN zygotes compared to 3PN zygotes: 43.3 years vs. 40.9 years (P =0.03). The diameter of micro PNs calculated using the receiver operating characteristics (ROC) curve from the measurements of the diameter was less than 15 μm (AUC [95%CI]: AUC=0.988 [0.975-1.00]). Logistic regression analysis using age, position of the oocyte spindle at ICSI, cytoplasmic viscosity, and condition of the cell membrane as explanatory variables revealed a significant difference only in age (P =0.0154, odds ratio [95%CI]: 1.18 [1.03-1.35]) and no statistically significant oocyte morphological characteristics.
Limitations, reasons for caution
In this study, we have not investigated whether 2.1 PN zygotes become blastocysts. It will be necessary to further examine the criteria for 2.1PN along with chromosome testing to investigate the use of 2.1PN-derived blastocysts.
Wider implications of the findings
A pronucleus of less than 15 μm in diameter can be considered a micro PN. Compared to 3PN zygotes, 2.1PN zygotes were more frequently observed in older patients and in ICSI-derived zygotes. However, it is difficult to predict the incidence of 2.1PN zygotes from the oocytes’ morphological characteristics at ICSI.
Trial registration number
not applicable
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Affiliation(s)
- N Nakajima
- Yamashita Shonan Yume Clinic, Embryologist, Fujisawa city- Kanagawa , Japan
| | - H Kawano
- Yamashita Shonan Yume Clinic, Embryologist, Fujisawa city- Kanagawa , Japan
| | - A Takai
- Yamashita Shonan Yume Clinic, Embryologist, Fujisawa city- Kanagawa , Japan
| | - Y Iimura
- Yamashita Shonan Yume Clinic, Embryologist, Fujisawa city- Kanagawa , Japan
| | - A Mutsumi
- Yamashita Shonan Yume Clinic, Embryologist, Fujisawa city- Kanagawa , Japan
| | - O Azusa
- Yamashita Shonan Yume Clinic, Embryologist, Fujisawa city- Kanagawa , Japan
| | - M Chen
- Yamashita Shonan Yume Clinic, Embryologist, Fujisawa city- Kanagawa , Japan
| | - N Yamashita
- Yamashita Shonan Yume Clinic, Dispensary, Fujisawa city- Kanagawa , Japan
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Nakajima N, Miller RA, Harrel ER. Mill Processability, Rheology and Structure Differences of Polyacrylate Elastomers. INT POLYM PROC 2022. [DOI: 10.1515/ipp-1987-0027] [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] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Two commercial polyacrylate elastomers, one having epoxide (EP) crosslinking sites and the other ethylidene norbornene (ENB) were selected. It was demonstrated that the former was more difficult to mill-process than the latter. The viscoelastic properties measured at very small strain in shear oscillation indicated that the ENB polymer was more branched than the EP polymer. The gel determination by filteration confirmed this. The tensile stress-strain measurements were conducted at four different deformation rates. These data were treated according to the strain-time correspondence principle to see if this principle applies to the data of these samples. The data of EP polymer did not form a master curve, thus, the above principle is not applicable; at the larger deformation the strain-hardening tendencies were observed. This indicates that the EP polymer has a rather extensive long branching, a type of which usually results from a chain transfer reaction.
The data of the ENB polymer, on the other hand, form a master-curve; that is, the strain-time correspondence principle is applicable, in spite of the presence of the large amount of gel. This means that the gel in the ENB polymer is microgel. The micro-gel in this case is polymer-latex particle, crosslinked during emulsion polymerization with a difunctional comonomer.
Thus, in this work polymer rheology was effectively used to find a major difference in the polymer chain structure. In this way it was shown that the results of polymerization may be related to mill processability.
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Affiliation(s)
- N. Nakajima
- Polymer Engineering Center, University of Akron . Akron , U.S.A
| | - R. A. Miller
- Polymer Engineering Center, University of Akron . Akron , U.S.A
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Ishii Y, Aiba N, Ando M, Asakura N, Bierwage A, Cara P, Dzitko H, Edao Y, Gex D, Hasegawa K, Hayashi T, Hiwatari R, Hoshino T, Ikeda Y, Ishida S, Isobe K, Iwai Y, Jokinen A, Kasugai A, Kawamura Y, Kim JH, Kondo K, Kwon S, Lorenzo SC, Masuda K, Matsuyama A, Miyato N, Morishita K, Nakajima M, Nakajima N, Nakamichi M, Nozawa T, Ochiai K, Ohta M, Oyaidzu M, Ozeki T, Sakamoto K, Sakamoto Y, Sato S, Seto H, Shiroto T, Someya Y, Sugimoto M, Tanigawa H, Tokunaga S, Utoh H, Wang W, Watanabe Y, Yagi M. R&D Activities for Fusion DEMO in the QST Rokkasho Fusion Institute. Fusion Science and Technology 2021. [DOI: 10.1080/15361055.2021.1925030] [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] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Y. Ishii
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - N. Aiba
- National Institutes for Quantum and Radiological Science and Technology, Naka Fusion Institute, Naka City, Japan
| | - M. Ando
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - N. Asakura
- National Institutes for Quantum and Radiological Science and Technology, Naka Fusion Institute, Naka City, Japan
| | - A. Bierwage
- National Institutes for Quantum and Radiological Science and Technology, Naka Fusion Institute, Naka City, Japan
| | - P. Cara
- IFMIF/EVEDA Project Team, Rokkasho-Vill., Japan
| | - H. Dzitko
- Fusion for Energy, Broader Approach, Garching, Germany
| | | | - D. Gex
- Fusion for Energy, Broader Approach, Garching, Germany
| | - K. Hasegawa
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - T. Hayashi
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - R. Hiwatari
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - T. Hoshino
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Ikeda
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - S. Ishida
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - K. Isobe
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Iwai
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - A. Jokinen
- IFMIF/EVEDA Project Team, Rokkasho-Vill., Japan
| | - A. Kasugai
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Kawamura
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - J. H. Kim
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - K. Kondo
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - S. Kwon
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - S. C. Lorenzo
- Fusion for Energy, Broader Approach, Barcelona, Spain
| | - K. Masuda
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - A. Matsuyama
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - N. Miyato
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - K. Morishita
- Kyoto University, Institute of Advanced Energy, Uji, Japan
| | - M. Nakajima
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - N. Nakajima
- National Institute for Fusion Science, Department of Helical Plasma Research Rokkasho Research Center, Rokkasho-Vill., Japan
| | - M. Nakamichi
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - T. Nozawa
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - K. Ochiai
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - M. Ohta
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - M. Oyaidzu
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - T. Ozeki
- NAT Corporation, Tohoku Branch Office, Rokkasho-Vill., Japan
| | - K. Sakamoto
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Sakamoto
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - S. Sato
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - H. Seto
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - T. Shiroto
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Someya
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - M. Sugimoto
- NAT Corporation, Tohoku Branch Office, Rokkasho-Vill., Japan
| | - H. Tanigawa
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - S. Tokunaga
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - H. Utoh
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - W. Wang
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Watanabe
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - M. Yagi
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
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Nakajima N, Kawano H, Kai Y, Takai A, Abe M, Iimura Y, Cheng M, Yoshida M, Yamashita N. P–248 Statistical estimation for incidence of blastocyst trophectoderm vesicles (TVs) and efficacy of assisted hatching (AH). Hum Reprod 2021. [DOI: 10.1093/humrep/deab130.247] [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] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Study question
The aim of this study is to analyse the association between blastocyst diameter and TVs development, and to examine the efficacy of AH.
Summary answer
Blastocysts with a diameter of more than 170 μm leads to high incidence of TVs and AH applied from the incidence should be effective.
What is known already
TVs are protrusion of trophectoderm cells often observed in expanding blastocyst stages. TVs can be observed in expanding blastocysts regardless of Intracytoplasmic sperm injection (ICSI) and Conventional-IVF (C-IVF), when the internal pressure of blastocysts increase. The rate of TVs incidence in blastocysts inseminated by ICSI is higher than that by C-IVF, due to penetration of the needle into the zona pellucida. Moreover, it has been reported that TVs may inhibit blastocyst hatching. However, the developmental timing of TVs is still unclear, and there is no study that has analysed the association between blastocyst diameter and the incidence of TVs.
Study design, size, duration
1) Diameters and TVs incidence of blastocysts by ICSI and C-IVF were measured, and the cut-off value and the area under the curve (AUC) of the receiver operating characteristic (ROC) curve were calculated to estimate the timing of TV incidence. 2) We analysed the clinical pregnancy rates of blastocysts with TVs treated by AH compared to those of blastocysts by C-IVF not subjected to AH.
Participants/materials, setting, methods
This study included 821 transferred frozen blastocysts ranging from March 2018 to November 2019. The embryos were cultured in a dry incubator after insemination by ICSI or C-IVF. Blastocyst freezing conditions were set at day5 to day7 with a diameter of more than 150 μm in inner diameter of zona pellucida, and this was measured before freezing. The ROC curve was performed using EZR statistical analysis software.
Main results and the role of chance
1) The incidence of TVs in blastocysts by ICSI and C-IVF was 27.5% (117/424) and 14.6% (58/397) respectively. The rate of the incidence of TVs in blastocysts inseminated by ICSI and C-IVF; 8.6% (12/140) and 0.95% (1/105) in 150–159 μm, 12.7% (14/110) and 8.2% (6/73) in 160–169 μm, 40.6% (28/69) and 10.5% (6/57) in 170–179 μm, 55.6% (30/54) and 25.5% (13/51) in 180–189 μm, 66.7% (20/30) and 35.7% (10/28) in 190–199 μm, and 68.4% (13/19) and 26.8% (22/82) in the diameter of more than 200 μm. The cut-off value of the ROC curve was respectively 170 μm (sensitivity 78.6% and specificity 73.0%) and 176 μm (sensitivity 84.5% and specificity 59.6%) in the diameter; the AUC was 0.8 [95%CI:0.752–0.848] and 0.74 [95%CI:0.687–0.793] respectively. 2) The clinical pregnancy rate of TVs blastocyst vs C-IVF blastocyst was 52.7% (88/167) vs 57.8% (37/64) respectively. There is no significant difference between the two clinical pregnancy rates (P = 0.556).
Limitations, reasons for caution
The findings of this study have to be seen in light of some limitations. Since this study aimed to analyse the incidence of TVs based on blastocyst size, we did not take into account the grade according to the Gardner classification and the number of trophectoderm cells.
Wider implications of the findings: Blastocysts inseminated by ICSI and C-IVF were highly likely to have TVs above 170 μm and 176 μm respectively. The clinical pregnancy rates of the blastocyst with TV treated by AH was similar to those of the C-IVF blastocyst.
Trial registration number
Not applicable
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Affiliation(s)
- N Nakajima
- Yamashita Shonan Yume Clinic, Embryologist, Fujisawa city- Kanagawa, Japan
| | - H Kawano
- Yamashita Shonan Yume Clinic, Embryologist, Fujisawa city- Kanagawa, Japan
| | - Y Kai
- Reproductive research center in Yamashita Shonan Yume Clinic, Researcher, Fujisawa city, Japan
| | - A Takai
- Yamashita Shonan Yume Clinic, Embryologist, Fujisawa city- Kanagawa, Japan
| | - M Abe
- Yamashita Shonan Yume Clinic, Embryologist, Fujisawa city- Kanagawa, Japan
| | - Y Iimura
- Yamashita Shonan Yume Clinic, Embryologist, Fujisawa city- Kanagawa, Japan
| | - M Cheng
- Yamashita Shonan Yume Clinic, Embryologist, Fujisawa city- Kanagawa, Japan
| | - M Yoshida
- Yamashita Shonan Yume Clinic, Physician, Fujisawa city- Kanagawa, Japan
| | - N Yamashita
- Yamashita Shonan Yume Clinic, Physician, Fujisawa city- Kanagawa, Japan
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8
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Yoshizawa A, Nakajima N, Kubo T. P38.05 Clinical, Genetic, Radiological, and Pathological Characteristics of Cribriform Adenocarcinoma of the Lung. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Tokunaga S, Moreau P, Signoret J, Imbeaux F, Tsitrone E, Loarer T, Salmon T, Hutter T, Giruzzi G, Joffrin E, De Tommasi G, Sartori F, Farthing J, Nakanishi H, Ozeki T, Asakura N, Sakamoto Y, Ohtsu H, Sugie Y, Suzuki S, Fukuda M, Nakano T, Sano R, Ishii Y, Clement-Lorenzo S, Nakajima N. Remote experiment with WEST from ITER Remote Experimentation Centre. Fusion Engineering and Design 2020. [DOI: 10.1016/j.fusengdes.2020.111554] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Nakajima T, Nakajima N, Kikuchi S, Iwamoto A, Sugiyama T. A case of pediatric obstructive sleep apnea successfully treated with rapid maxillary expansion. Sleep Med 2019. [DOI: 10.1016/j.sleep.2019.11.766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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Yoshizawa A, Kondo K, Nakajima N. P1.09-18 Small-Sized Spread Through Air Spaces (STAS) in Resected Pulmonary Adenocarcinoma: Is It Necessary to Record It as a Prognostic Factor? J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1047] [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: 11/28/2022]
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12
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Hiwatari R, Katayama K, Nakamura M, Miyoshi Y, Aoki A, Asakura N, Utoh H, Homma Y, Tokunaga S, Nakajima N, Someya Y, Sakamoto Y, Tobita K. Development of plant concept related to tritium handling in the water-cooling system for JA DEMO. Fusion Engineering and Design 2019. [DOI: 10.1016/j.fusengdes.2019.03.174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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13
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Yoshizawa A, Kondo K, Nakajima N, Teramoto Y, Rokutan-Kurata M, Sumiyoshi S. P2.09-32 Detached Epithelial Cell Cluster Size in Lung Adenocarcinoma is a Marker of Poor Prognosis. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1329] [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: 11/24/2022]
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14
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Abe Y, Nakajima N, Sakaguchi Y, Arikawa Y, Mirfayzi SR, Fujioka S, Taguchi T, Mima K, Yogo A, Nishimura H, Shiraga H, Nakai M. A multichannel gated neutron detector with reduced afterpulse for low-yield neutron measurements in intense hard X-ray backgrounds. Rev Sci Instrum 2018; 89:10I114. [PMID: 30399813 DOI: 10.1063/1.5039436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 07/11/2018] [Indexed: 06/08/2023]
Abstract
A design of multichannel gated photomultiplier tube (PMT) is presented for the 960-channel neutron time-of-flight detector at the Institute of Laser Engineering of Osaka University. This is important for the fusion science and the nuclear photonics where intense hard X-rays are generated from the interaction of ultra-short laser pulse of petawatt power density with matter. The hard X-rays often overload PMTs and cause signal-induced background noises called afterpulses, making the detection of subsequent neutrons impossible. For this reason, the PMTs are coupled with an electrical time-gating (ETG) system to avoid overloading. The ETG system disables the PMT by modulating the dynode potential during the primary X-ray flash. An after-pulsing suppression technique is demonstrated by applying a reverse bias voltage between the photocathode and the first dynode. The presented multichannel scheme provides a gate response time of 80 ns, a signal cutoff ratio of 2.5 × 102, and requires reasonably low power consumption.
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Affiliation(s)
- Y Abe
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - N Nakajima
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | | | - Y Arikawa
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - S R Mirfayzi
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - T Taguchi
- Setsunan University, Osaka 572-8508, Japan
| | - K Mima
- Graduate School for the Creation of New Photonics Industries, Shizuoka 431-1202, Japan
| | - A Yogo
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - H Nishimura
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - H Shiraga
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - M Nakai
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
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15
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Manduchi G, Rigoni A, De Tommasi G, Sartori F, Fredian T, Stillerman J, Barbato P, Clement-Lorenzo S, Nakajima N, Nakanishi H, Sugie Y, Ohtsu H. MDSplus remote data access over high latency connections. Fusion Engineering and Design 2018. [DOI: 10.1016/j.fusengdes.2018.01.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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16
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Farthing J, Ozeki T, Clement Lorenzo S, Nakajima N, Sartori F, De Tommasi G, Manduchi G, Barbato P, Rigoni A, Vitale V, Giruzzi G, Mattei M, Mele A, Imbeaux F, Artaud JF, Robin F, Noe J, Joffrin E, Hynes A, Hemming O, Wheatley M, O’hira S, Ide S, Ishii Y, Matsukawa M, Kubo H, Totsuka T, Urano H, Naito O, Hayashi N, Miyata Y, Namekawa M, Wakasa A, Oshima T, Nakanishi H, Yamanaka K. Status of the ITER remote experimentation centre. Fusion Engineering and Design 2018. [DOI: 10.1016/j.fusengdes.2018.02.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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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17
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Sato H, Takahashi K, Nakajima N, Hasegawa G, Mizuno K, Hashimoto S, Ikarashi S, Hayashi K, Honda Y, Yokoyama J, Sato Y, Terai S. Full-layer mucosal histology in achalasia: Histological epithelial wave is characteristic in "pinstripe pattern"-positive achalasia. Neurogastroenterol Motil 2018; 30. [PMID: 28745833 DOI: 10.1111/nmo.13168] [Citation(s) in RCA: 8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Accepted: 06/26/2017] [Indexed: 02/08/2023]
Abstract
BACKGROUND Previously, the mucosal histology in achalasia has only been investigated using superficial biopsy or surgically resected esophageal specimens in end-stage cases. We investigated the histology of the full-layer mucosa in early and advanced achalasia. METHODS Endoscopy was performed for the pinstripe pattern (PSP) (an early achalasia indicator) and dilation and thickening of the mucosa (advanced achalasia indicators). A mucosal entry site for peroral endoscopic myotomy was created using cap-fitted endoscopic mucosal resection to access the full-layer mucosa and the submucosa. KEY RESULTS Mucosal histology was compared between 32 patients with achalasia and 15 controls. Histological esophagitis with findings of inflammatory cell infiltration and dilated intercellular spaces was observed more in patients with achalasia than in controls (87.5% vs 13.3%, P<.001; 84.4% vs 46.7%, P=.049). Muscularis mucosae (MM) atrophy and epithelial wave were only observed in achalasia (40.6% vs 0%, P=.005; 28.1% vs 0%, P=.043). Fibrosis was more common in achalasia, but without statistical significance (31.3% vs 20.0%, P=.503). In achalasia with endoscopic dilation and thickening of the mucosa, MM atrophy was observed histologically, and in cases involving endoscopic PSP, the histological epithelial wave was observed. CONCLUSIONS & INFERENCES Histological findings of esophagitis were observed endoscopically even in early achalasia. Pinstripe pattern corresponds to the epithelial wave observed histologically in achalasia, whereas endoscopic findings in advanced achalasia correspond to MM atrophy. Appropriate management is necessary during early achalasia to prevent progression to advanced achalasia with more severe histological changes.
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Affiliation(s)
- H Sato
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan.,Division of Gastroenterology and Hepatology, Saiseikai Niigata Daini Hospital, Niigata, Japan
| | - K Takahashi
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - N Nakajima
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - G Hasegawa
- Division of Cellular and Molecular Pathology, Department of Cellular Function, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - K Mizuno
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - S Hashimoto
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - S Ikarashi
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - K Hayashi
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - Y Honda
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - J Yokoyama
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - Y Sato
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - S Terai
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
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18
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Takahashi K, Sato Y, Takeuchi M, Sato H, Nakajima N, Ikarashi S, Hayashi K, Mizuno KI, Honda Y, Hashimoto S, Yokoyama J, Terai S. Changes in esophageal motility after endoscopic submucosal dissection for superficial esophageal cancer: a high-resolution manometry study. Dis Esophagus 2017; 30:1-8. [PMID: 28881900 DOI: 10.1093/dote/dox057] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 01/14/2017] [Indexed: 12/11/2022]
Abstract
The effect of endoscopic submucosal dissection (ESD) on esophageal motility remains unknown. Therefore, the aim of this study is to elucidate changes in esophageal motility after ESD along with the cause of dysphagia using high-resolution manometry (HRM). This is a before-and-after trial of the effect of ESD on the esophageal motility. Twenty patients who underwent ESD for superficial esophageal carcinoma were enrolled in this study. Patients filled out a questionnaire about dysphagia and underwent HRM before and after ESD. Results before and after ESD were compared. Data were obtained from 19 patients. The number of patients who complained of dysphagia before and after ESD was 1/19 (5.3%) and 6/19 (31.6%), respectively (P = 0.131). Scores from the five-point Likert scale before and after ESD were 0.1 ± 0.5 and 1.0 ± 1.6, respectively (P = 0.043). The distal contractile integral (DCI) before and after ESD and the number of failed, weak, or fragmented contractions were not significantly different. However, in five patients with circumferential ESD, DCI was remarkably decreased and the frequency of fail, weak, or fragmented contractions increased. Univariate regression analysis showed a relatively strong inverse correlation of ΔDCI with the circumferential mucosal defect ratio {P < 0.01, standardized regression coefficient (r) = -0.65}, the number of stricture preventions (P < 0.01, r = -0.601), and the number of stricture resolutions (P < 0.01, r = -0.77). This HRM study showed that impairment of esophageal motility could be caused by ESD. The impairment of esophageal motility was conspicuous, especially in patients with circumferential ESD and subsequent procedures such as endoscopic triamcinolone injection and endoscopic balloon dilatation. Impaired esophageal motility after ESD might explain dysphagia.
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Affiliation(s)
- K Takahashi
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University
| | - Y Sato
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University
| | - M Takeuchi
- Division of Gastroenterology and Hepatology, Nagaoka Red Cross Hospital
| | - H Sato
- Division of Gastroenterology and Hepatology, Saiseikai Niigata Daini Hospital, Niigata, Japan
| | - N Nakajima
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University
| | - S Ikarashi
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University
| | - K Hayashi
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University
| | - K-I Mizuno
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University
| | - Y Honda
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University
| | - S Hashimoto
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University
| | - J Yokoyama
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University
| | - S Terai
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University
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19
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Fukuchi H, Okawa T, Yamamoto T, Kato S, Nakajima N, Yoshioka Y. Detection of recognition from ambiguous visual information using FMRI. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Mitsuyoshi T, Matsuo Y, Shintani T, Iizuka Y, Mampuya W, Nagai H, Ozasa H, Kim Y, Chen-Yoshikawa T, Sonobe M, Nakajima N, Yoshizawa A, Mizowaki T, Date H, Hiraoka M. EP-1224: Therapeutic effects of accelerated hyperfractionation and conventional fractionation CRT on NSCLC. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31659-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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21
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Todo Y, Murakami S, Yamamoto T, Fukuyama A, Spong DA, Yamamoto S, Osakabe M, Nakajima N. Numerical Analyses of Energetic Particles in LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10814] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y. Todo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Murakami
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - T. Yamamoto
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - A. Fukuyama
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - D. A. Spong
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - S. Yamamoto
- Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Nakajima
- National Institute for Fusion Science, Toki 509-5292, Japan
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22
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Yamamoto S, Nagasaki K, Suzuki Y, Mizuuchi T, Okada H, Kobayashi S, Blackwell B, Kondo K, Motojima G, Nakajima N, Nakamura Y, Nührenberg C, Torii Y, Watanabe S, Sano F. Observation of Magnetohydrodynamic Instabilities in Heliotron J Plasmas. Fusion Science and Technology 2017. [DOI: 10.13182/fst07-a1290] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- S. Yamamoto
- Osaka University, Graduate School of Engineering, 2-1 Yamadaoka Suita 565-0871, Japan
| | - K. Nagasaki
- Kyoto University, Institute of Advanced Energy, Gokasho Uji 611-0011, Japan
| | - Y. Suzuki
- Kyoto University, Institute of Advanced Energy, Gokasho Uji 611-0011, Japan
| | - T. Mizuuchi
- Kyoto University, Institute of Advanced Energy, Gokasho Uji 611-0011, Japan
| | - H. Okada
- Kyoto University, Institute of Advanced Energy, Gokasho Uji 611-0011, Japan
| | - S. Kobayashi
- Kyoto University, Institute of Advanced Energy, Gokasho Uji 611-0011, Japan
| | - B. Blackwell
- The Australian National University, Research School of Physical Science and Engineering, Canberra, Australia
| | - K. Kondo
- Kyoto University, Graduate School of Energy Science, Gokasho Uji 611-0011, Japan
| | - G. Motojima
- Kyoto University, Graduate School of Energy Science, Gokasho Uji 611-0011, Japan
| | - N. Nakajima
- Kyoto University, Institute of Advanced Energy, Gokasho Uji 611-0011, Japan
| | - Y. Nakamura
- Kyoto University, Graduate School of Energy Science, Gokasho Uji 611-0011, Japan
| | - C. Nührenberg
- Max-Planck-Institut für Plasmaphysik, IPP-Euratom Association, Greifswald, Germany
| | - Y. Torii
- Kyoto University, Institute of Advanced Energy, Gokasho Uji 611-0011, Japan
| | - S. Watanabe
- Kyoto University, Graduate School of Energy Science, Gokasho Uji 611-0011, Japan
| | - F. Sano
- Kyoto University, Institute of Advanced Energy, Gokasho Uji 611-0011, Japan
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23
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Watanabe KY, Suzuki Y, Sakakibara S, Yamaguchi T, Narushima Y, Nakamura Y, Ida K, Nakajima N, Yamada H. Characteristics of MHD Equilibrium and Related Issues on LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10803] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- K. Y. Watanabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Suzuki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Sakakibara
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Yamaguchi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Narushima
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Nakamura
- Graduate School of Energy Science, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - K. Ida
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Nakajima
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Yamada
- National Institute for Fusion Science, Toki 509-5292, Japan
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24
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Miura H, Nakajima N, Hayashi T, Okamoto M. Nonlinear Evolution of Magnetohydrodynamic Instability in LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst07-a1282] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- H. Miura
- Theory and Computer Simulation Center, National Institute for Fusion Science, National Institute of Natural Sciences 322-6 Oroshi, Toki, Gifu 509-5292, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies (SOKENDAI) 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - N. Nakajima
- Theory and Computer Simulation Center, National Institute for Fusion Science, National Institute of Natural Sciences 322-6 Oroshi, Toki, Gifu 509-5292, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies (SOKENDAI) 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - T. Hayashi
- Department of Fusion Science, The Graduate University for Advanced Studies (SOKENDAI) 322-6 Oroshi, Toki, Gifu 509-5292, Japan
- Theory and Data Analysis Division, National Institute for Fusion Science, National Institute of Natural Sciences 322-6 Oroshi, Toki, Gifu 509-5292, Japan
| | - M. Okamoto
- Theory and Computer Simulation Center, National Institute for Fusion Science, National Institute of Natural Sciences 322-6 Oroshi, Toki, Gifu 509-5292, Japan
- Department of Fusion Science, The Graduate University for Advanced Studies (SOKENDAI) 322-6 Oroshi, Toki, Gifu 509-5292, Japan
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25
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Nakajima N, Hudson SR, Hegna CC. Properties of Ballooning Modes in the Planar Axis Heliotron Configurations with a Large Shafranov Shift. Fusion Science and Technology 2017. [DOI: 10.13182/fst07-a1289] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- N. Nakajima
- National Institute for Natural Sciences, National Institute for Fusion Science, 322-6 Oroshi, Toki 509-5292, Japan
- The Graduate University for Advanced Studies, Department of Fusion Science, (SOKENDAI), 322-6 Oroshi Toki 509-5292, Japan
| | - S. R. Hudson
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, New Jersey 08543
| | - C. C. Hegna
- University of Wisconsin-Madison, Department of Engineering Physics, Madison, Wisconsin 53706
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26
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Nakamura Y, Nakajima N, Watanabe KY, Yokoyama M. Effects of the Bumpy Field Component on the Bootstrap Current in L = 1 Helical Plasmas. Fusion Science and Technology 2017. [DOI: 10.13182/fst06-a1247] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yuji Nakamura
- Kyoto University, Graduate School of Energy Science Gokasho, Uji, Kyoto 611-0011, Japan
| | - N. Nakajima
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Y. Watanabe
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M. Yokoyama
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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27
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Yokoyama M, Wakasa A, Murakami S, Watanabe KY, Satake S, Nishimura S, Sugama H, Nakajima N, Funaba H, Nakamura Y. Role of Neoclassical Transport and Radial Electric Field in LHD Plasmas. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10813] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Yokoyama
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - A. Wakasa
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - S. Murakami
- Kyoto University, Department of Nuclear Engineering, Kyoto 606-8501, Japan
| | - K. Y. Watanabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Satake
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Nishimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Sugama
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Nakajima
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Funaba
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Nakamura
- Kyoto University, Graduate School of Energy Science, Uji 611-0011, Japan
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28
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Toi K, Isobe M, Osakabe M, Watanabe F, Ogawa K, Yamamoto S, Nakajima N, Spong DA, Ida K, Ido T, Ito T, Morita S, Nagaoka K, Narihara K, Nishiura M, Ohdachi S, Sakakibara S, Shimizu A, Tanaka K, Todo Y, Tokuzawa T, Weller A. MHD Modes Destabilized by Energetic Ions on LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a10805] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- K. Toi
- National Institute for Fusion Science, Toki, Japan
| | - M. Isobe
- National Institute for Fusion Science, Toki, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki, Japan
| | - F. Watanabe
- Department of Energy Engineering and Science, Nagoya University, Nagoya, Japan
| | - K. Ogawa
- Department of Energy Engineering and Science, Nagoya University, Nagoya, Japan
| | - S. Yamamoto
- Institute of Advanced Energy, Kyoto University, Uji, Japan
| | - N. Nakajima
- National Institute for Fusion Science, Toki, Japan
| | - D. A. Spong
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | - K. Ida
- National Institute for Fusion Science, Toki, Japan
| | - T. Ido
- National Institute for Fusion Science, Toki, Japan
| | - T. Ito
- Department of Energy Engineering and Science, Nagoya University, Nagoya, Japan
| | - S. Morita
- National Institute for Fusion Science, Toki, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki, Japan
| | - K. Narihara
- National Institute for Fusion Science, Toki, Japan
| | - M. Nishiura
- National Institute for Fusion Science, Toki, Japan
| | - S. Ohdachi
- National Institute for Fusion Science, Toki, Japan
| | | | - A. Shimizu
- National Institute for Fusion Science, Toki, Japan
| | - K. Tanaka
- National Institute for Fusion Science, Toki, Japan
| | - Y. Todo
- National Institute for Fusion Science, Toki, Japan
| | - T. Tokuzawa
- National Institute for Fusion Science, Toki, Japan
| | - A. Weller
- Max-Planck Institut für Plasma Physik, Greifswald, Germany
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Nakajima N, Sato H, Takahashi K, Hasegawa G, Mizuno K, Hashimoto S, Sato Y, Terai S. Muscle layer histopathology and manometry pattern of primary esophageal motility disorders including achalasia. Neurogastroenterol Motil 2017; 29. [PMID: 27699951 DOI: 10.1111/nmo.12968] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [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: 06/16/2016] [Accepted: 09/08/2016] [Indexed: 12/17/2022]
Abstract
BACKGROUND Histopathology of muscularis externa in primary esophageal motility disorders has been characterized previously. We aimed to correlate the results of high-resolution manometry with those of histopathology. METHODS During peroral endoscopic myotomy, peroral esophageal muscle biopsy was performed in patients with primary esophageal motility disorders. Immunohistochemical staining for c-kit was performed to assess the interstitial cells of Cajal (ICCs). Hematoxylin Eosin and Azan-Mallory staining were used to detect muscle atrophy, inflammation, and fibrosis, respectively. KEY RESULTS Slides from 30 patients with the following motility disorders were analyzed: achalasia (type I: 14, type II: 5, type III: 3), one diffuse esophageal spasm (DES), two outflow obstruction (OO), four jackhammer esophagus (JE), and one nutcracker esophagus (NE). ICCs were preserved in high numbers in type III achalasia (n=9.4±1.2 cells/high power field [HPF]), compared to types I (n=3.7±0.3 cells/HPF) and II (n=3.5±1.0 cells/HPF). Moreover, severe fibrosis was only observed in type I achalasia and not in other types of achalasia, OO, or DES. Four of five patients with JE and NE had severe inflammation with eosinophilic infiltration of the esophageal muscle layer (73.8±50.3 eosinophils/HPF) with no epithelial eosinophils. One patient with JE showed a visceral myopathy pattern. CONCLUSIONS & INFERENCES Compared to types I and II, type III achalasia showed preserved ICCs, with variable data regarding DES and OO. In disorders considered as primary esophageal motility disorders, a disease category exists, which shows eosinophilic infiltration in the esophageal muscle layer with no eosinophils in the epithelium.
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Affiliation(s)
- N Nakajima
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - H Sato
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan.,Division of Gastroenterology and Hepatology, Saiseikai Niigata Daini Hospital, Niigata, Japan
| | - K Takahashi
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - G Hasegawa
- Division of Cellular and Molecular Pathology, Department of Cellular Function, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - K Mizuno
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - S Hashimoto
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - Y Sato
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - S Terai
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
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Lu C, Nakajima N, Maruyama H. Observation of the flexoelectricity of a SrTiO 3 single crystal by x-ray absorption and emission spectroscopies. J Phys Condens Matter 2017; 29:045702. [PMID: 27882902 DOI: 10.1088/1361-648x/29/4/045702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Flexoelectricity, defined as the spontaneous electric polarization in a dielectric material induced by a strain gradient, is investigated from the microscopic viewpoint by x-ray spectroscopy. A single crystal SrTiO3 sample was used as a test system in order to reveal the appearance of the electric dipole moment by simple bending of the crystal. The spectral change characteristic of ferroelectric transition in SrTiO3 was not observed in the Ti K-edge absorption spectra. Instead, the gradual decrease (increase) of the post-edge feature (pre-edge structure) by bending was qualitatively explained using theoretical calculations that assumed the presence of oxygen vacancies and a slight crystal distortion. This assumption is also supported by the broadening of a tiny charge-transfer peak in the Ti Kβ resonant emission spectra. Therefore, it was revealed that the flexoelectric effect in SrTiO3 is easily drowned out through local imperfection induced by crystal deformations and cracks.
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Affiliation(s)
- C Lu
- Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
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31
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Yamanishi T, Asakura N, Tobita K, Ohira S, Federici G, Heidinger R, Knaster J, Clement S, Nakajima N. Recent technical progress on BA Program: DEMO activities and IFMIF/EVEDA. Fusion Engineering and Design 2016. [DOI: 10.1016/j.fusengdes.2015.12.045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Nakajima N, Oguchi M, Kumai Y, Yoshida M, Iwase T, Ito Y, Akiyama F, Ohno S. Clinical Outcome and Prognostic Factors in Locally Advanced Breast Cancer Patients Treated With Neoadjuvant Chemotherapy Followed by Surgery and Postmastectomy Radiation Therapy. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.647] [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: 10/20/2022]
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Adenyo C, Ogden R, Kayang B, Onuma M, Nakajima N, Inoue-Murayama M. Genome-wide DNA markers to support genetic management for domestication and commercial production in a large rodent, the Ghanaian grasscutter (Thryonomys swinderianus). Anim Genet 2016; 48:113-115. [PMID: 27436241 DOI: 10.1111/age.12478] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/17/2016] [Indexed: 11/28/2022]
Abstract
Domestication and commercial production of the grasscutter, Thryonomys swinderianus, a large rodent, represents an important opportunity to secure sustainable animal protein for local communities in West Africa. To support production, DNA markers are required for population diversity assessment, pedigree analysis and marker-assisted selection. This study reports the application of double-digest RAD sequencing to simultaneously discover and genotype SNP markers in 24 wild and recently domesticated grasscutters. An initial panel of 1209 SNP loci was characterised from a total of more than 21 000 candidate loci containing single SNPs. This genome-wide resource represents the first application of its type to commercial production of a large rodent for food and advances the use of agricultural genomics in Ghana.
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Affiliation(s)
- C Adenyo
- Livestock and Poultry Research Centre, College of Basic and Applied Sciences, University of Ghana, Legon, Ghana
| | - R Ogden
- Wildlife Research Center of Kyoto University, 2-24 Tanaka-Sekiden-cho, Kyoto, 606-8203, Japan
| | - B Kayang
- Department of Animal Science, College of Basic and Applied Sciences, University of Ghana, Legon, Ghana
| | - M Onuma
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba-City, Ibaraki, 305-8506, Japan
| | - N Nakajima
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba-City, Ibaraki, 305-8506, Japan
| | - M Inoue-Murayama
- Wildlife Research Center of Kyoto University, 2-24 Tanaka-Sekiden-cho, Kyoto, 606-8203, Japan
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Sato H, Sato Y, Hashimoto S, Mizuno K, Nakajima N, Terai S. Gastrointestinal: Salvage peroral endoscopic myotomy for outflow obstruction with growing esophageal diverticulum. J Gastroenterol Hepatol 2016; 31:1237. [PMID: 27059011 DOI: 10.1111/jgh.13397] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 03/22/2016] [Indexed: 12/12/2022]
Affiliation(s)
- H Sato
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - Y Sato
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - S Hashimoto
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - K Mizuno
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - N Nakajima
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - S Terai
- Division of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan
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35
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Satoh K, Satomi J, Nakajima N, Nagahiro S. Endovascular Treatment Using Detachable Coils for Non-Ruptured Intracranial Aneurysm. Interv Neuroradiol 2016; 5 Suppl 1:67-70. [DOI: 10.1177/15910199990050s112] [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] [Received: 09/20/1999] [Accepted: 09/30/1999] [Indexed: 11/17/2022] Open
Abstract
Detachable coil embolization was performed on 34 non-ruptured cerebral aneurysms in 33 patients. Patients consisted of 28 females and five males, with an age range of 26 to 77 years. Angiographic examination after coil embolization revealed complete or near-complete occlusion in 24 aneurysms (70.5%) and partial occlusion in three (8.8%). Detachable coil embolization was attempted unsuccessfully in seven aneurysms (20.5%). Transient ischemic attack occurred in one case with coil migration. The combined mortality/morbidity rate was 0%.
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Affiliation(s)
- K. Satoh
- Department of Neurological Surgery, School of Medicine; The University of Tokushima
| | - J. Satomi
- Department of Neurological Surgery, School of Medicine; The University of Tokushima
| | - N. Nakajima
- Department of Neurological Surgery, School of Medicine; The University of Tokushima
| | - S. Nagahiro
- Department of Neurological Surgery, School of Medicine; The University of Tokushima
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Nakajima N, Taguchi S, Kanzaki H, Nishijima N, Ochi T, Mochizuki T. Predictive Value of Volume-Based Parameters on Postradiation Therapy 18F-FDG PET/CT in Patients With Head and Neck Squamous Cell Carcinoma. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.1341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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Nakajima N, Taguchi S, Kanzaki H, Nishijima N, Ochi T, Mochizuki T. Edema Index on Pretreatment MRI Correlates With Clinical Outcomes in Patients With High Grade Glioma. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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38
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De Tommasi G, Manduchi G, Muir D, Ide S, Naito O, Urano H, Clement-Lorenzo S, Nakajima N, Ozeki T, Sartori F. Current status of the European contribution to the Remote Data Access System of the ITER Remote Experimentation Centre. Fusion Engineering and Design 2015. [DOI: 10.1016/j.fusengdes.2015.06.094] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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Hatakeyama Y, Miyano I, Kataoka H, Nakajima N, Watabe T, Yasuda N, Okuhara Y. Use of a Latent Topic Model for Characteristic Extraction from Health Checkup Questionnaire Data. Methods Inf Med 2015; 54:515-21. [PMID: 26063536 DOI: 10.3414/me15-01-0023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 05/29/2015] [Indexed: 12/19/2022]
Abstract
OBJECTIVES When patients complete questionnaires during health checkups, many of their responses are subjective, making topic extraction difficult. Therefore, the purpose of this study was to develop a model capable of extracting appropriate topics from subjective data in questionnaires conducted during health checkups. METHODS We employed a latent topic model to group the lifestyle habits of the study participants and represented their responses to items on health checkup questionnaires as a probability model. For the probability model, we used latent Dirichlet allocation to extract 30 topics from the questionnaires. According to the model parameters, a total of 4381 study participants were then divided into groups based on these topics. Results from laboratory tests, including blood glucose level, triglycerides, and estimated glomerular filtration rate, were compared between each group, and these results were then compared with those obtained by hierarchical clustering. RESULTS If a significant (p < 0.05) difference was observed in any of the laboratory measurements between groups, it was considered to indicate a questionnaire response pattern corresponding to the value of the test result. A comparison between the latent topic model and hierarchical clustering grouping revealed that, in the latent topic model method, a small group of participants who reported having subjective signs of urinary disorder were allocated to a single group. CONCLUSIONS The latent topic model is useful for extracting characteristics from a small number of groups from questionnaires with a large number of items. These results show that, in addition to chief complaints and history of past illness, questionnaire data obtained during medical checkups can serve as useful judgment criteria for assessing the conditions of patients.
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Affiliation(s)
- Y Hatakeyama
- Yutaka Hatakeyama, Center of Medical Information Science, Kochi University Medical School, Oko-cho Kohasu, Nankoku, Kochi 783-8505, Japan, E-mail:
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40
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Nakajima N, Ochi T, Uwatsu K, Mochizuki T. High Subventricular Zone Radiation Dose Correlates With Progression-Free Survival in Glioblastoma Patients After Concurrent Temozolomide Administration and Extended Focal Radiation Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.974] [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: 10/24/2022]
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41
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Hatakeyama Y, Kataoka H, Nakajima N, Watabe T, Fujimoto S, Okuhara Y. Prediction model for glucose metabolism based on lipid metabolism. Methods Inf Med 2014; 53:357-63. [PMID: 24986162 DOI: 10.3414/me14-01-0034] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Accepted: 04/18/2014] [Indexed: 11/09/2022]
Abstract
OBJECTIVES We developed a robust, long-term clinical prediction model to predict conditions leading to early diabetes using laboratory values other than blood glucose and insulin levels. Our model protects against missing data and noise that occur during long-term analysis. METHODS RESULTS of a 75-g oral glucose tolerance test (OGTT) were divided into three groups: diabetes, impaired glucose tolerance (IGT), and normal (n = 114, 235, and 325, respectively). For glucose metabolic and lipid metabolic parameters, near 30-day mean values and 10-year integrated values were compared. The relation between high-density lipoprotein cholesterol (HDL-C) and variations in HbA1c was analyzed in 158 patients. We also constructed a state space model consisting of an observation model (HDL-C and HbA1c) and an internal model (disorders of lipid metabolism and glucose metabolism) and applied this model to 116 cases. RESULTS The root mean square error between the observed HbA1c and predicted HbA1c was 0.25. CONCLUSIONS In the observation model, HDL-C levels were useful for prediction of increases in HbA1c. Even with numerous missing values over time, as occurs in clinical practice, clinically valid predictions can be made using this state space model.
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Affiliation(s)
- Y Hatakeyama
- Yutaka Hatakeyama, Center of Medical Information Science, Kochi University Medical School, Oko-cho Kohasu, Nankoku, Kochi, Kochi 783-8505, Japan, E-mail:
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Yamaguchi T, Nakajima N, Nakamura I, Mashiba H, Kawashiro T, Ebara K, Ichimura E, Nishimura C, Okamoto K, Ichikawa Y, Ichida T. Preclinical anticancer effects and toxicologic assessment of hepatic artery infusion of fine-powder cisplatin with lipiodol in vivo. Drug Discov Ther 2013; 7:201-208. [PMID: 24270385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We conducted an in vivo study to evaluate the anticancer effect and toxicity of fine-powder cisplatin suspended in lipiodol (fCDDP/LPD suspension) after a single administration of three different doses to rats via the intrahepatic artery after transplantation of rat ascites hepatoma cells. The toxicity of the fCDDP/LPD suspension was also assessed in the same protocol in noncancer-bearing rats and the observed toxicologic changes were compared among groups administered saline (Sal), an aqueous solution of fCDDP (fCDDP/Sal solution), and LPD alone. In parallel with the toxicity test, plasma CDDP concentrations were compared between the fCDDP/LPD suspension and fCDDP/Sal solution. The mean weight of the tumors in the fCDDP/LPD suspension groups was significantly less than in the LPD-alone group. The pathologic changes in the liver observed in the fCDDP/LPD suspension group increased with dose, were more marked compared with those in the fCDDP/Sal solution and LPD-alone groups, and were reversible. No other toxicologic effects were observed. The concentration of CDDP in the plasma in the fCDDP/LPD suspension group was slightly lower than that in the fCDDP/Sal solution group. In conclusion, the results indicate that the fCDDP/LPD suspension has sufficient anticancer efficacy and tolerability for use in the clinical treatment of hepatocellular carcinoma.
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Affiliation(s)
- T Yamaguchi
- Pharmaceutical Research Laboratories, Nippon Kayaku Co., Ltd., Tokyo, Japan
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Owaki M, Oono H, Nakajima N, Ohta G, Okano S, Kakizaki T, Yoshioka K. Morphology and Distribution of Lamellar Corpuscles in the Mesentery of the Cat. Anat Histol Embryol 2013; 43:375-8. [DOI: 10.1111/ahe.12087] [Citation(s) in RCA: 2] [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] [Received: 09/30/2012] [Accepted: 07/31/2013] [Indexed: 11/28/2022]
Affiliation(s)
- M. Owaki
- Inuyama Veterinarian Hospital; 29 Haguro aza Omishita Inuyama Aichi Japan
| | - H. Oono
- Oono Dog & Cat Hospital; 5-2 Kurisaki Honjo Saitama Japan
| | - N. Nakajima
- Shimodate Animal Hospital; 1246-3 Shimonakayama Chikusei Ibaraki Japan
| | - G. Ohta
- Inuyama Veterinarian Hospital; 29 Haguro aza Omishita Inuyama Aichi Japan
| | - S. Okano
- Kitasato University School of Veterinary Medicine; 35-1 Higashi 23ban-cho Towada Aomori Japan
| | - T. Kakizaki
- Kitasato University School of Veterinary Medicine; 35-1 Higashi 23ban-cho Towada Aomori Japan
| | - K. Yoshioka
- Kitasato University School of Veterinary Medicine; 35-1 Higashi 23ban-cho Towada Aomori Japan
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Abstract
Abstract
This paper provides a scientific treatment for mixing of rubber with reinforcing fillers. The primary attention is given to the viscoelastic nature of rubber. It is addressed to the practitioners of rubber processing, who have hands-on experience but lack familiarity with viscoelasticity. In the first part we provide a sketch of the major events: (1) polymerization, (2) resulting molecular architecture, (3) mechanical property of gum rubber, (4) mill processability, (5) processing with the internal mixer, and (6) compounding rubber with carbon black. The focal point of this paper is to relate the mill processability to the elongation and failure behavior of gum rubber. Viscous and elastic contributions to this relation are described. This relation provides the starting point for introducing scientific treatment for rubber mixing. Mechanisms of incorporation and dispersion of carbon black are also discussed. The presentation follows in an order of description on the behavior of gum rubber, that of carbon black, the interaction between rubber and carbon black, and the interaction between the material and the internal mixer.
In the second part a method of constructing viscoelastic master-curves from the tensile stress-strain data is presented. Such a master curve serves as a useful means of characterizing gum rubber in relating polymerization, resulting molecular architecture and processability. The milling and mixing of rubber with filler are achieved with fracture; the consequence of fracture is a generation of supermolecular flow units. The mechanism of fracture involves the pull out of chain ends through entanglements. The high concentration of the chain ends on the surface gives a tacky appearance to mixed compounds.
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Affiliation(s)
- N. Nakajima
- Institute of Polymer Engineering, University of Akron, Akron, OH, U.S.A
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46
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Abstract
Abstract
Polymer blends consisting of miscible components may form single phase structures; however, it requires solution blending to ensure complete homogeneity. For a large scale mixing, however, mechanical blending is the common practice. The resulting blends are homogeneous on the macroscale, but often contain microscopic domains of the component polymers as well as domains of mixed phases. This work describes mechanical blends of PVC with miscible polymers (nitrile rubber, poly-e-caprolactone, and a copolyester thermoplastic elastomer). The complex morphology of these blends has been studied and identified by means of the frequency- and temperature-dependence of their viscoelastic behavior.
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Affiliation(s)
- N. Nakajima
- Institute of Polymer Engineering, The University of Akron, Akron, U.S.A
| | - S.-Y. Kwak
- Institute of Polymer Engineering, The University of Akron, Akron, U.S.A
- Present address: Division of Polymer Research, Korea Institute of Science and Technology (KIST), P.O. Box 131 Cheongryang, Seoul 130-650, Korea
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Abstract
Abstract
This work is an investigation on causes of extrusion problem of a high silica- and all silica-filled natural rubber compounds containing a coupling agent. The 67% silica and 33% carbon black, N110 compound (Compound 3) gave a wavy surface of extrudate from a profile die. The 100% silica-filled compound (Compound 4) was too stiff to be extruded. Reference compounds, 100% carbon black (Compound 1) and 33% silica with 67% carbon black (Compound 2), gave smooth extrudates. The amplitude dependence of storage modulus measurements indicated Compound 4 had a poorer dispersion of the filler. Scanning electron microscopy also showed a poorer dispersion for this compound. However, Compound 3 could not be distinguished from Compounds 1 and 2 in the above investigation. Transient shear measurements at very low deformation rate indicated a reaction between natural rubber and the coupling agent, resulting in gel and long-branch formation. Differential scanning calorimetry indicated the coupling reaction was completed at 140°C within the mixing time. By holding the maximum temperature of mixing as low as possible, the extrudate of Compound 3 became smooth, but Compound 4 still did not perform well. Improvement of dispersion is necessary to make Compound 4 extrudable.
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Affiliation(s)
- N. Nakajima
- Institute of Polymer Engineering, University of Akron, Akron, U.S.A
| | - W. J. Shieh
- Institute of Polymer Engineering, University of Akron, Akron, U.S.A
| | - Z. G. Wang
- Institute of Polymer Engineering, University of Akron, Akron, U.S.A
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Abstract
Abstract
During gelation and fusion process PVC plastisols changes from a suspension of resin particles in a liquid plasticizer to a uniform mass. The manner of change was observed with a scanning electron microscope, SEM. Four different plasticizers varying solvent power were used: they were dioctyl phthalate, dioctyl sebacate, dibutyl sebacate and tricresyl phosphate. Significant differences were observed among different plasticizer systems in a manner of dissolution of PVC into a plasticizer, swelling of PVC particles with a plasticizer and fusing to form a uniform mass. The SEM micrographs are presented with reference to the viscoelastic properties at the corresponding temperature.
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Affiliation(s)
- N. Nakajima
- Polymer Engineering Center, University of Akron, Akron, U.S.A
| | - M. R. Sadeghi
- Polymer Engineering Center, University of Akron, Akron, U.S.A
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Abstract
Abstract
The flow in a pin-barrel extruder has been analyzed based on a Newtonian fluid model. A numerical simulation based on the FAN method of Tadmor and his coworkers and an analytical model were used. The calculations show that the introduction of slices into screw flights and pins make the apparatus a much poorer screw pump. It would appear that the machine is though an effective continuous (distributive) mixing device.
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Affiliation(s)
- R. Brzoskowski
- Polymer Engineering Center, University of Akron, Akron, USA
| | - J. L. White
- Polymer Engineering Center, University of Akron, Akron, USA
| | - W. Szydlowski
- Polymer Engineering Center, University of Akron, Akron, USA
| | - N. Nakajima
- Polymer Engineering Center, University of Akron, Akron, USA
| | - K. Min
- Polymer Engineering Center, University of Akron, Akron, USA
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