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Okamoto K, Kawaguchi T, Kagemoto K, Kida Y, Mitsui Y, Nakamura F, Yoshikawa K, Sogabe M, Sato Y, Shunto J, Bando Y, Shimada M, Takayama T. Gastric fundic gland polyposis and cancer development after eradication of Helicobacter pylori in patient with gastric adenocarcinoma and proximal polyposis of the stomach (GAPPS). Gastric Cancer 2024; 27:635-640. [PMID: 38407681 DOI: 10.1007/s10120-024-01473-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 01/22/2024] [Indexed: 02/27/2024]
Abstract
A 44-year-old woman with gastric cancer (GC) and fundic gland polyposis (FGPs) was referred to our hospital for further diagnosis and treatment. She successfully underwent eradication therapy for Helicobacter pylori (HP) 6 years ago, but did not exhibit FGPs at that time. When she underwent an esophagogastroduodenoscopy 2, 4, and 5 years after the eradication of HP, her imaging results revealed the existence of FGPs which gradually increased in her gastric fundus and body. Gastric adenocarcinoma and proximal polyposis of the stomach (GAPPS) was suspected and a mutational analysis was performed, revealing an APC promoter 1B variant c.-191T > C. A robotic total gastrectomy with lymphadenectomy was performed. Histopathological analysis of the surgical specimens revealed GC with no lymph node metastasis. GAPPS is characterized by GC and FGPs. However, our case shows different gastric phenotypes that are dependent on the status of HP infection.
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Affiliation(s)
- Koichi Okamoto
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan.
| | - Tomoyuki Kawaguchi
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
| | - Kaizo Kagemoto
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
| | - Yoshifumi Kida
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
| | - Yasuhiro Mitsui
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
| | - Fumika Nakamura
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
| | - Kozo Yoshikawa
- Department of Surgery, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Masahiro Sogabe
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
| | - Yasushi Sato
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
| | | | - Yoshimi Bando
- Division of Pathology, Tokushima University Hospital, Tokushima, Japan
| | - Mitsuo Shimada
- Department of Surgery, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Tetsuji Takayama
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
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Sogabe M, Okahisa T, Kagawa M, Sei M, Kagemoto K, Tanaka H, Kida Y, Nakamura F, Tomonari T, Okamoto K, Miyamoto H, Sato Y, Nakasono M, Takayama T. Association of metabolic dysfunction-associated fatty liver disease with gallstone development: A longitudinal study. J Gastroenterol Hepatol 2024; 39:754-761. [PMID: 38212880 DOI: 10.1111/jgh.16483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 11/10/2023] [Accepted: 12/20/2023] [Indexed: 01/13/2024]
Abstract
BACKGROUND AND AIM The influence of metabolic dysfunction-associated fatty liver disease on gallstone development remains unclear. We aimed to investigate the longitudinal association between metabolic dysfunction-associated fatty liver disease and gallstone development in both men and women. METHODS This observational cohort study included 5398 patients without gallstones who underwent > 2 health check-ups between April 1, 2014, and March 31, 2020. A generalized estimation equation model was used to analyze the association between metabolic dysfunction-associated fatty liver disease and gallstone development according to repeated measures at baseline and most recent stage. RESULTS After adjustment, the odds ratios of metabolic dysfunction-associated fatty liver disease for gallstone development in men and women were 3.019 (95% confidence interval [CI]: 1.901-4.794) and 2.201 (95% CI: 1.321-3.667), respectively. Among patients aged ≥ 50 years, the odds ratio for gallstone development was significantly enhanced with increasing metabolic dysfunction-associated fatty liver disease component numbers in both sexes; however, no significance was observed in those aged < 50 years. Other significant risk factors for gallstone development were age (odds ratio: 1.093, 95% CI: 1.060-1.126) and waist circumference (odds ratio: 1.048, 95% CI: 1.018-1.079) in men and age (odds ratio: 1.035, 95% CI: 1.003-1.067) and current smoking (odd ratio: 5.465, 95% CI: 1.881-15.88) in women. CONCLUSION Although the risk factors for gallstone development differed between sexes, metabolic dysfunction-associated fatty liver disease was common. Paying attention to an increase in the number of metabolic dysfunction-associated fatty liver disease components in patients aged ≥ 50 years is important for gallstone prevention.
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Affiliation(s)
- Masahiro Sogabe
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
- Department of Internal Medicine, Shikoku Central Hospital of the Mutual Aid Association of Public School Teachers, Shikokuchuo, Japan
| | - Toshiya Okahisa
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
- Department of Internal Medicine, Shikoku Central Hospital of the Mutual Aid Association of Public School Teachers, Shikokuchuo, Japan
| | - Miwako Kagawa
- Department of Internal Medicine, Shikoku Central Hospital of the Mutual Aid Association of Public School Teachers, Shikokuchuo, Japan
| | - Motoko Sei
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Kaizo Kagemoto
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Hironori Tanaka
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Yoshifumi Kida
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Fumika Nakamura
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Tetsu Tomonari
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Koichi Okamoto
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Hiroshi Miyamoto
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Yasushi Sato
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Masahiko Nakasono
- Department of Internal Medicine, Tsurugi Municipal Handa Hospital, Tsurugi, Japan
| | - Tetsuji Takayama
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
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Sogabe M, Okahisa T, Kagawa M, Sei M, Ueda H, Yokoyama R, Kagemoto K, Tanaka H, Kida Y, Nakamura F, Tomonari T, Okamoto K, Kawano Y, Miyamoto H, Sato Y, Nakasono M, Takayama T. Association of metabolic dysfunction-associated steatotic liver disease with erosive esophagitis development: a longitudinal observational study. J Gastroenterol Hepatol 2024. [PMID: 38419514 DOI: 10.1111/jgh.16530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 01/19/2024] [Accepted: 02/08/2024] [Indexed: 03/02/2024]
Abstract
BACKGROUND AND AIM Although erosive esophagitis (EE) is associated with fatty liver and metabolic dysregulation, the association between EE and metabolic dysfunction-associated steatotic liver disease (MASLD) remains unclear. Thus, this study aimed to investigate the longitudinal association between MASLD and EE. METHODS We included 1578 patients without EE at baseline who underwent more than two health checkups over 2 years. Generalized estimation equations were used to analyze associations between MASLD and EE according to repeated measures at baseline and most recent stages. RESULTS EE development rates in men and women were 14.5% and 7.2%, respectively. After adjusting for lifestyle habits, the odds ratios of MASLD for EE development in men and women were 1.907 (95% confidence interval [CI]: 1.289-2.832, P < 0.005) and 1.483 (95% CI: 0.783-2.811, P = 0.227), respectively. In the subgroup analysis, after adjusting for lifestyle habits, among men and women aged ≥50 years with more than three MASLD components, the odds ratios for EE development were 2.408 (95% CI: 1.505-3.855, P < 0.001) and 2.148 (95% CI: 1.093-4.221, P < 0.05), respectively. After adjusting for various factors, the significant risk factors for EE development were different between men and women. CONCLUSION The influence of MASLD and other factors on EE development differed by sex and age. Particularly, patients aged ≥50 years with MASLD and with an increased number of MASLD components should be considered at increased risk for EE.
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Affiliation(s)
- Masahiro Sogabe
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
- Department of Internal Medicine, Shikoku Central Hospital of the Mutual Aid Association of Public School Teachers, Shikokuchuo, Japan
| | - Toshiya Okahisa
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
- Department of Internal Medicine, Shikoku Central Hospital of the Mutual Aid Association of Public School Teachers, Shikokuchuo, Japan
| | - Miwako Kagawa
- Department of Internal Medicine, Shikoku Central Hospital of the Mutual Aid Association of Public School Teachers, Shikokuchuo, Japan
| | - Motoko Sei
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Hiroyuki Ueda
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
- Department of Internal Medicine, Shikoku Central Hospital of the Mutual Aid Association of Public School Teachers, Shikokuchuo, Japan
| | - Reiko Yokoyama
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Kaizo Kagemoto
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Hironori Tanaka
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Yoshifumi Kida
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Fumika Nakamura
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Tetsu Tomonari
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Koichi Okamoto
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Yutaka Kawano
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Hiroshi Miyamoto
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Yasushi Sato
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Masahiko Nakasono
- Department of Internal Medicine, Tsurugi Municipal Handa Hospital, Tsurugi, Japan
| | - Tetsuji Takayama
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
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Kawai N, Noda Y, Nakamura F, Kaga T, Suzuki R, Miyoshi T, Mori F, Hyodo F, Kato H, Matsuo M. Low-tube-voltage whole-body CT angiography with extremely low iodine dose: a comparison between hybrid-iterative reconstruction and deep-learning image-reconstruction algorithms. Clin Radiol 2024:S0009-9260(24)00096-5. [PMID: 38403540 DOI: 10.1016/j.crad.2024.02.002] [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] [Received: 09/08/2023] [Revised: 01/29/2024] [Accepted: 02/07/2024] [Indexed: 02/27/2024]
Abstract
AIM To evaluate arterial enhancement, its depiction, and image quality in low-tube potential whole-body computed tomography (CT) angiography (CTA) with extremely low iodine dose and compare the results with those obtained by hybrid-iterative reconstruction (IR) and deep-learning image-reconstruction (DLIR) methods. MATERIALS AND METHODS This prospective study included 34 consecutive participants (27 men; mean age, 74.2 years) who underwent whole-body CTA at 80 kVp for evaluating aortic diseases between January and July 2020. Contrast material (240 mg iodine/ml) with simultaneous administration of its quarter volume of saline, which corresponded to 192 mg iodine/ml, was administered. CT raw data were reconstructed using adaptive statistical IR-Veo of 40% (hybrid-IR), DLIR with medium- (DLIR-M), and high-strength level (DLIR-H). A radiologist measured CT attenuation of the arteries and background noise, and the signal-to-noise ratio (SNR) was then calculated. Two reviewers qualitatively evaluated the arterial depictions and diagnostic acceptability on axial, multiplanar-reformatted (MPR), and volume-rendered (VR) images. RESULTS Mean contrast material volume and iodine weight administered were 64.1 ml and 15.4 g, respectively. The SNRs of the arteries were significantly higher in the following order of the DLIR-H, DLIR-M, and hybrid-IR (p<0.001). Depictions of six arteries on axial, three arteries on MPR, and four arteries on VR images were significantly superior in the DLIR-M or hybrid-IR than in the DLIR-H (p≤0.009 for each). Diagnostic acceptability was significantly better in the DLIR-M and DLIR-H than in the hybrid-IR (p<0.001-0.005). CONCLUSION DLIR-M showed well-balanced arterial depictions and image quality compared with the hybrid-IR and DLIR-H.
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Affiliation(s)
- N Kawai
- Department of Radiology, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan
| | - Y Noda
- Department of Radiology, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan.
| | - F Nakamura
- Department of Radiology, Gifu Municipal Hospital, 7-1 Kashima, Gifu 500-8513, Japan
| | - T Kaga
- Department of Radiology, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan
| | - R Suzuki
- Department of Radiology Services, Gifu University Hospital, 1-1 Yanagido, Gifu 501-1194, Japan
| | - T Miyoshi
- Department of Radiology Services, Gifu University Hospital, 1-1 Yanagido, Gifu 501-1194, Japan
| | - F Mori
- Department of Radiology, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan
| | - F Hyodo
- Department of Pharmacology, Graduate School of Medicine, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan; Center for One Medicine Innovative Translational Research (COMIT), Institute for Advanced Study, Gifu University, Japan
| | - H Kato
- Department of Radiology, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan
| | - M Matsuo
- Department of Radiology, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan
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Yokoyama R, Sato Y, Nakamura F, Kagemoto K, Mitsui Y, Okamoto K, Kawano Y, Sogabe M, Miyamoto H, Takayama T. Efficacy of immune checkpoint inhibitors in patients with anorectal melanoma in association with immune-related adverse events: a case series. Clin J Gastroenterol 2023; 16:842-847. [PMID: 37632658 DOI: 10.1007/s12328-023-01849-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 08/15/2023] [Indexed: 08/28/2023]
Abstract
Anorectal melanoma (AM) is a rare subtype of mucosal melanoma with a poor prognosis. Given its rarity compared to its cutaneous counterpart, the benefits and side effects of immune checkpoint inhibitor (ICI) therapy and the relationship between side effects and prognosis remain unclear. Herein, we describe the clinical presentation of five patients with AM treated with ICI as well as their relationship to the treatment course and the development of immune-related adverse events (irAEs). Three patients received sequential or concurrent administrations of nivolumab and ipilimumab, one received nivolumab alone, and one received ipilimumab alone. The response rate (RR) and disease control rate (DCR) were 40% and 80%, respectively. Pituitary and hepatic dysfunctions were the most common irAEs observed (40% each), followed by thyroid, diarrhea, and renal dysfunctions (20% each). The RR was 67% in patients with irAEs while no response was observed in patients without irAEs. DCR was 100% and 50% in patients with and without irAEs, respectively. Overall survival was 34 months in irAE and 8.75 months in non-irAE cases, with a longer survival trend in irAE cases. ICI therapy was effective and well-tolerated by AM patients, with potentially better outcomes for those who experienced irAEs compared to those who did not.
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Affiliation(s)
- Reiko Yokoyama
- Department of Gastroenterology and Oncology, School of Medical Science, Tokushima University Graduate School of Medical Science, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
| | - Yasushi Sato
- Department of Community Medicine for Gastroenterology and Oncology, Tokushima University Graduate School of Medical Science, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan.
| | - Fumika Nakamura
- Department of Gastroenterology and Oncology, School of Medical Science, Tokushima University Graduate School of Medical Science, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
| | - Kaizo Kagemoto
- Department of Gastroenterology and Oncology, School of Medical Science, Tokushima University Graduate School of Medical Science, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
| | - Yasuhiro Mitsui
- Department of Gastroenterology and Oncology, School of Medical Science, Tokushima University Graduate School of Medical Science, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
| | - Koichi Okamoto
- Department of Gastroenterology and Oncology, School of Medical Science, Tokushima University Graduate School of Medical Science, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
| | - Yutaka Kawano
- Department of Gastroenterology and Oncology, School of Medical Science, Tokushima University Graduate School of Medical Science, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
| | - Masahiro Sogabe
- Department of Gastroenterology and Oncology, School of Medical Science, Tokushima University Graduate School of Medical Science, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
| | - Hiroshi Miyamoto
- Department of Gastroenterology and Oncology, School of Medical Science, Tokushima University Graduate School of Medical Science, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
| | - Tetsuji Takayama
- Department of Gastroenterology and Oncology, School of Medical Science, Tokushima University Graduate School of Medical Science, 3-18-15, Kuramoto-Cho, Tokushima, 770-8503, Japan
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McKenzie G, Gaskins J, Rattani A, Oliver A, Southall W, Nakamura F, Yusuf M, Mistry A, Williams B, Woo S. Single-Fraction vs. Fractionated Radiosurgery and the Development of Post-Treatment Hemorrhage for Intact Melanoma Brain Metastases. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.667] [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: 10/31/2022]
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Uchida K, Mattoni G, Yonezawa S, Nakamura F, Maeno Y, Tanaka K. High-Order Harmonic Generation and Its Unconventional Scaling Law in the Mott-Insulating Ca_{2}RuO_{4}. Phys Rev Lett 2022; 128:127401. [PMID: 35394320 DOI: 10.1103/physrevlett.128.127401] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 01/17/2022] [Accepted: 02/10/2022] [Indexed: 06/14/2023]
Abstract
Competition and cooperation among orders is at the heart of many-body physics in strongly correlated materials and leads to their rich physical properties. It is crucial to investigate what impact many-body physics has on extreme nonlinear optical phenomena, with the possibility of controlling material properties by light. However, the effect of competing orders and electron-electron correlations on highly nonlinear optical phenomena has not yet been experimentally clarified. Here, we investigated high-order harmonic generation from the Mott-insulating phase of Ca_{2}RuO_{4}. Changing the gap energy in Ca_{2}RuO_{4} as a function of temperature, we observed a strong enhancement of high order harmonic generation at 50 K, increasing up to several hundred times compared to room temperature. We discovered that this enhancement can be well reproduced by an empirical scaling law that depends only on the material gap energy and photon emission energy. Such a scaling law can hardly be explained by the electronic structure change in the single particle model and has not been predicted by previous theoretical studies on HHG in the simple Mott-Hubbard model. Our results suggest that the highly nonlinear optical response of strongly correlated materials is influenced by competition among the multiple degrees of freedom and electron-electron correlations.
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Affiliation(s)
- K Uchida
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto, Kyoto 606-8502, Japan
| | - G Mattoni
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto, Kyoto 606-8502, Japan
| | - S Yonezawa
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto, Kyoto 606-8502, Japan
| | - F Nakamura
- Department of Education and Creation Engineering, Kurume Institute of Technology, Kurume, Fukuoka 830-0052, Japan
| | - Y Maeno
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto, Kyoto 606-8502, Japan
| | - K Tanaka
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto, Kyoto 606-8502, Japan
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Murakami K, Tochinai R, Tachibana D, Isano Y, Matsuda R, Nakamura F, Kurotaki Y, Isoda Y, Yamane M, Sugita Y, Fukuda J, Ueno K, Miki N, Fuchiwaki O, Ota H. Direct Wiring of Liquid Metal on an Ultrasoft Substrate Using a Polyvinyl Alcohol Lift-off Method. ACS Appl Mater Interfaces 2022; 14:7241-7251. [PMID: 35084813 DOI: 10.1021/acsami.1c20628] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In recent years, wiring and system construction on ultrasoft materials such as biological tissues and hydrogels have been proposed for advanced wearable devices, implantable devices, and soft robotics. Among the soft conductive materials, Ga-based liquid metals (LMs) are both biocompatible and ultrasoft, making them a good match for electrodes on the ultrasoft substrates. However, gels and tissues are softer and less wettable to the LMs than conventional soft substrates such as Ecoflex and polydimethylsiloxane. In this study, we demonstrated the transfer of LM paste composed of Ga-based LM and Ni nanoparticles onto ultrasoft substrates such as biological tissue and gels using sacrificial polyvinyl alcohol (PVA) films. The LM paste pattern fabricated on the PVA film adhered to the ultrasoft substrate along surface irregularities and was transferred without being destroyed by the PVA film before the PVA's dissolution in water. The minimum line width that could be wired was approximately 165 μm. Three-dimensional wiring, such as the helical structure on the gel fiber surface, is also possible. Application of this transfer method to tissues using LM paste wiring allowed the successful stimulation of the vagus nerve in rats. In addition, we succeeded in transferring a temperature measurement system fabricated on a PVA film onto the gel. The connection between the solid-state electrical element and the LM paste was stable and maintained the functionality of the temperature-sensing system. This fundamental study of wiring fabrication and system integration can contribute to the development of advanced electric devices based on ultrasoft substrates.
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Affiliation(s)
- Koki Murakami
- Department of Mechanical Engineering, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Ryota Tochinai
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Daiki Tachibana
- Department of Mechanical Engineering, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Yuji Isano
- Department of Mechanical Engineering, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Ryosuke Matsuda
- Department of Mechanical Engineering, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Fumika Nakamura
- Department of Mechanical Engineering, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Yuta Kurotaki
- Department of Mechanical Engineering, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Yutaka Isoda
- Graduate School of System Integration, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Monami Yamane
- Department of Chemistry and Life Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Yuya Sugita
- Department of Chemistry and Life Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Junji Fukuda
- Graduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Kazuhide Ueno
- Graduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Norihisa Miki
- Department of Mechanical Engineering, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Ohmi Fuchiwaki
- Department of Mechanical Engineering, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
- Graduate School of System Integration, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Hiroki Ota
- Department of Mechanical Engineering, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
- Graduate School of System Integration, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
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Noda Y, Nakamura F, Kawamura T, Kawai N, Kaga T, Miyoshi T, Kato H, Hyodo F, Matsuo M. Deep-learning image-reconstruction algorithm for dual-energy CT angiography with reduced iodine dose: preliminary results. Clin Radiol 2021; 77:e138-e146. [PMID: 34782114 DOI: 10.1016/j.crad.2021.10.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 10/15/2021] [Indexed: 01/24/2023]
Abstract
AIM To evaluate the computed tomography (CT) attenuation values, background noise, arterial depiction, and image quality in whole-body dual-energy CT angiography (DECTA) at 40 keV with a reduced iodine dose using deep-learning image reconstruction (DLIR) and compare them with hybrid iterative reconstruction (IR). MATERIAL AND METHODS Whole-body DECTA with a reduced iodine dose (200 mg iodine/kg) was performed in 22 patients, and DECTA data at 1.25-mm section thickness with 50% overlap were reconstructed at 40 keV using 40% adaptive statistical iterative reconstruction with Veo (hybrid-IR group), and DLIR at medium and high levels (DLIR-M and DLIR-H groups). The CT attenuation values of the thoracic and abdominal aortas and iliac artery and background noise were measured. Arterial depiction and image quality on axial, multiplanar reformatted (MPR), and volume-rendered (VR) images were assessed by two readers. Quantitative and qualitative parameters were compared between the hybrid-IR, DLIR-M, and DLIR-H groups. RESULTS The vascular CT attenuation values were almost comparable between the three groups (p=0.013-0.97), but the background noise was significantly lower in the DLIR-H group than in the hybrid-IR and DLIR-M groups (p<0.001). The arterial depictions on axial and MPR images and in almost all arteries on VR images were comparable (p=0.14-1). The image quality of axial, MPR, and VR images was significantly better in the DLIR-H group (p<0.001-0.015). CONCLUSION DLIR significantly reduced background noise and improved image quality in DECTA at 40 keV compared with hybrid-IR, while maintaining the arterial depiction in almost all arteries.
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Affiliation(s)
- Y Noda
- Department of Radiology, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan.
| | - F Nakamura
- Department of Radiology, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan
| | - T Kawamura
- Department of Radiology, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan
| | - N Kawai
- Department of Radiology, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan
| | - T Kaga
- Department of Radiology, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan
| | - T Miyoshi
- Department of Radiology Services, Gifu University Hospital, 1-1 Yanagido, Gifu 501-1194, Japan
| | - H Kato
- Department of Radiology, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan
| | - F Hyodo
- Department of Radiology, Frontier Science for Imaging, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan
| | - M Matsuo
- Department of Radiology, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan
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Okazaki J, Tanahashi T, Sato Y, Miyoshi J, Nakagawa T, Kimura T, Miyamoto H, Fujino Y, Nakamura F, Takehara M, Ma B, Bando M, Kitamura S, Okamoto K, Muguruma N, Sogabe M, Takayama T. MicroRNA-296-5p Promotes Cell Invasion and Drug Resistance by Targeting Bcl2-Related Ovarian Killer, Leading to a Poor Prognosis in Pancreatic Cancer. Digestion 2021; 101:794-806. [PMID: 31563901 DOI: 10.1159/000503225] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [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: 05/24/2019] [Accepted: 09/05/2019] [Indexed: 02/04/2023]
Abstract
BACKGROUND/AIMS Pancreatic ductal adenocarcinoma (PDAC) is characterized by aggressive invasion, early metastasis, and resistance to chemotherapy, leading to a poor prognosis. To clarify the molecular mechanism of these malignant characteristics, we performed a genome-wide microRNA (miRNA) array analysis utilizing micro-cancer tissues from patients with unresectable PDAC (stage IV), obtained by endoscopic ultrasound-fine needle aspiration (EUS-FNA). METHODS The expression profiles of 2,042 miRNAs were determined using micro-cancer tissues from 13 patients with unresectable PDAC obtained by EUS-FNA. The relationship between individual miRNA levels and overall survival (OS) was analyzed. Possible target genes for miRNAs were bioinformatically analyzed using the online database miRDB. Pancreatic cancer cell lines PANC-1, MIA PaCa-2, and PK-8 were transfected with miRNA mimic or small interfering RNA, and cell invasion, epithelial-mesenchymal transition (EMT), and apoptosis markers were examined. miRNA and mRNA expressions were examined by quantitative polymerase chain reaction. RESULTS Of 2,042 miRNAs, the 10 that exhibited the lowest correlation coefficient (p ≤ 0.005) between miRNA expression level and OS among the patients were identified. The miRDB and expression analysis in cancer cell lines for the 10 miRNAs identified miR-296-5p and miR-1207-5p as biomarkers predictive of shorter survival (p < 0.0005). Bioinformative target gene analysis and transfection experiments with miRNA mimics showed that Bcl2-related ovarian killer (BOK), a pro-apoptotic gene, is a target for miR296-5p in pancreatic cancer cells; transfection of miR-296-5p mimic into PANC-1, MIA PaCa-2, and PK-8 cells resulted in significant suppression of BOK mRNA and protein expression. These transfectants showed significantly higher invasion capability compared with control cells, and knock down of BOK in pancreatic cancer cells similarly enhanced invasion capability. Transfectants of miR-296-5p mimic also exhibited aberrant expression of EMT markers, including vimentin and N-cadherin. Moreover, these transfectants showed a significantly lower apoptosis rate in response to 5-fluorouracil and gemcitabine with a decrease of BOK expression, suggesting a role of miR-296-5p in drug resistance. CONCLUSION These results suggest that miR-296-5p is a useful biomarker for a poor prognosis in patients with PDAC, and that the miR-296-5p/BOK signaling axis plays an important role in cell invasion, drug resistance, and EMT in PDACs.
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Affiliation(s)
- Jun Okazaki
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Toshihito Tanahashi
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Yasushi Sato
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Jinsei Miyoshi
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Tadahiko Nakagawa
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Tetsuo Kimura
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Hiroshi Miyamoto
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Yasuteru Fujino
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Fumika Nakamura
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Masanori Takehara
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Beibei Ma
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Masahiro Bando
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Shinji Kitamura
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Koichi Okamoto
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Naoki Muguruma
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Masahiro Sogabe
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Tetsuji Takayama
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan,
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11
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Inamori G, Kamoto U, Nakamura F, Isoda Y, Uozumi A, Matsuda R, Shimamura M, Okubo Y, Ito S, Ota H. Neonatal wearable device for colorimetry-based real-time detection of jaundice with simultaneous sensing of vitals. Sci Adv 2021; 7:eabe3793. [PMID: 33658197 PMCID: PMC7929506 DOI: 10.1126/sciadv.abe3793] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 01/21/2021] [Indexed: 05/19/2023]
Abstract
Neonatal jaundice occurs in >80% of newborns in the first week of life owing to physiological hyperbilirubinemia. Severe hyperbilirubinemia could cause brain damage owing to its neurotoxicity, a state commonly known as kernicterus. Therefore, periodic bilirubin monitoring is essential to identify infants at-risk and to initiate treatment including phototherapy. However, devices for continuous measurements of bilirubin have not been developed yet. Here, we established a wearable transcutaneous bilirubinometer that also has oxygen saturation (SpO2) and heart rate (HR) sensing functionalities. Clinical experiments with neonates demonstrated the possibility of simultaneous detection of bilirubin, SpO2, and HR. Moreover, our device could consistently measure bilirubin during phototherapy. These results demonstrate the potential for development of a combined treatment approach with an automatic link via the wearable bilirubinometer and phototherapy device for optimization of the treatment of neonatal jaundice.
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Affiliation(s)
- Go Inamori
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Umihiro Kamoto
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Fumika Nakamura
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Yutaka Isoda
- Graduate School of System Integration, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Azusa Uozumi
- Department of Pediatrics, Graduate School of Medicine, Yokohama City University, 3-9 Fukura, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan
| | - Ryosuke Matsuda
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Masaki Shimamura
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Yusuke Okubo
- Division of Cellular and Molecular Toxicology, Biological Safety and Research Center, National Institute of Health Sciences, Tonomachi 3-25-26, Kawasaki, Kanagawa 210-9501, Japan
| | - Shuichi Ito
- Department of Pediatrics, Graduate School of Medicine, Yokohama City University, 3-9 Fukura, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan
| | - Hiroki Ota
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan.
- Graduate School of System Integration, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
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12
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Ochirkhuyag N, Matsuda R, Song Z, Nakamura F, Endo T, Ota H. Liquid metal-based nanocomposite materials: fabrication technology and applications. Nanoscale 2021; 13:2113-2135. [PMID: 33465221 DOI: 10.1039/d0nr07479a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Research on liquid metals has been steadily garnering more interest in recent times, especially in flexible electronics applications because of their properties like possessing high conductivity and being liquid state at room temperature. The unique properties afforded by such materials at low temperatures can compensate for the limitations of stretchable electronic devices, particularly robustness and their fluidic property, which can enhance the flexibility and deformation of these devices. Therefore, interest in liquid-metal nanoparticles and liquid metals with nanocomposites has enabled research into their fabrication technologies as well as utilisation in fields such as chemistry, polymer engineering, computational modelling, and nanotechnology. In particular, in flexible and stretchable electronic device applications, the research attention is focused on the fabrication methodologies of liquid-metal nanoparticles and liquid metals containing nanocomposites. This review attempts to summarise the available stretchable and flexible electronics applications that use liquid-metal nanoparticles as well as liquid metals with nanomaterial additives.
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Affiliation(s)
| | - Ryosuke Matsuda
- Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Zihao Song
- Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Fumika Nakamura
- Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Takuma Endo
- Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Hiroki Ota
- Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
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13
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Takaya M, Matsuda R, Inamori G, Kamoto U, Isoda Y, Tachibana D, Nakamura F, Fuchiwaki O, Okubo Y, Ota H. Transformable Electrocardiograph Using Robust Liquid-Solid Heteroconnector. ACS Sens 2021; 6:212-219. [PMID: 33395271 DOI: 10.1021/acssensors.0c02135] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In this study, a highly transformable electrocardiograph that can considerably deform the position of stretchable electrodes based on the lead method for diagnosing heart disease was developed; these electrodes exhibited high resistance stability against considerable stretching and multiple stretching. To realize the large deformable functionality of the electrodes of a system, liquid metal electrodes and a heteroconnector composed of a liquid metal paste and carbon-based conductive rubber were employed. The developed device can achieve a 200% strain with only 6% resistance change and a high stability of resistances after the 100-time stretching test. In addition, the study demonstrated electrocardiograms in different lead methods of adult and child using the same device. The proposed combination of large deformable electrodes with high electric stability and a robust heteroconnector is an important technology, and it presents a considerable advancement in the application of stretchable electronic systems.
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Affiliation(s)
- Maika Takaya
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Ryosuke Matsuda
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Go Inamori
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Umihiro Kamoto
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Yutaka Isoda
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Daiki Tachibana
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Fumika Nakamura
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Ohmi Fuchiwaki
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
- Graduate School of System Integration, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Yusuke Okubo
- Division of Cellular and Molecular Toxicology, Biological Safety and Research Center, National Institute of Health Sciences, Tonomachi 3-25-26, Kawasaki, Kanagawa 210-9501, Japan
| | - Hiroki Ota
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
- Graduate School of System Integration, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
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14
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Tanaka H, Okamoto K, Sato Y, Tanaka T, Tomonari T, Nakamura F, Fujino Y, Mitsui Y, Miyamoto H, Muguruma N, Morita A, Ikushima H, Takayama T. Synergistic anti-tumor activity of miriplatin and radiation through PUMA-mediated apoptosis in hepatocellular carcinoma. J Gastroenterol 2020; 55:1072-1086. [PMID: 32666201 DOI: 10.1007/s00535-020-01705-8] [Citation(s) in RCA: 2] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Accepted: 06/29/2020] [Indexed: 02/04/2023]
Abstract
BACKGROUND The prognosis for patients with unresectable advanced hepatocellular carcinoma (HCC) is poor. Miriplatin is a hydrophobic platinum compound that has a long retention time in lesions after transarterial chemoembolization (TACE). We investigated anti-tumor activity of miriplatin combined with irradiation on HCC cells, and its underlying mechanism of apoptosis. We also analyzed the effectiveness of miriplatin-TACE and radiotherapy for locally advanced HCC. METHODS Human HCC cell lines HepG2 and HuH-7 were treated with DPC (active form of miriplatin) and radiation, and synergy was evaluated using a combination index (CI). Apoptosis-related proteins and cell cycles were analyzed by western blotting and flowcytometry. We retrospectively analyzed treatment outcomes in 10 unresectable HCC patients with vascular/bile duct invasion treated with miriplatin-TACE and radiotherapy. RESULTS DPC or X-ray irradiation decreased cell viability dose-dependently. DPC plus irradiation decreased cell viability synergistically in both cell lines (CI < 1, respectively). Cleaved PARP expression was induced much more strongly by DPC plus irradiation than by each treatment alone. Expression of p53 up-regulated modulator of apoptosis (PUMA) was significantly induced by the combination, and knockdown of PUMA with siRNA significantly decreased apoptosis in both cell lines. DPC plus irradiation caused sub-G1, G2/M, and S phase cell arrest in those cells. The combination of miriplatin-TACE and radiotherapy showed a high response rate for patients with locally advanced HCC despite small number of patients. CONCLUSIONS Miriplatin plus irradiation had synergistic anti-tumor activity on HCC cells through PUMA-mediated apoptosis and cell cycle arrest. This combination may possibly be effective in treating locally advanced HCC.
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Affiliation(s)
- Hironori Tanaka
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Koichi Okamoto
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Yasushi Sato
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Takahiro Tanaka
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Tetsu Tomonari
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Fumika Nakamura
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Yasuteru Fujino
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Yasuhiro Mitsui
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Hiroshi Miyamoto
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Naoki Muguruma
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Akinori Morita
- Department of Biomedical Science and Technology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Hitoshi Ikushima
- Department of Therapeutic Radiology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Tetsuji Takayama
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, 770-8503, Japan.
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15
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Yoshino T, Kotaka M, Manaka D, Eto T, Hasegawa J, Takagane A, Nakamura M, Kato T, Munemoto Y, Nakamura F, Bando H, Taniguchi H, Sakamoto Y, Shiozawa M, Nishi M, Horiuchi T, Mizushima T, Yamanaka T, Ohtsu A, Mori M. 401MO OS and long-term DFS with 3- vs. 6-month adjuvant oxaliplatin and fluoropyrimidine-based therapy for stage III colon cancer patients: A randomized phase III ACHIEVE trial. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.512] [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: 10/23/2022] Open
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16
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Takehara M, Sato Y, Kimura T, Noda K, Miyamoto H, Fujino Y, Miyoshi J, Nakamura F, Wada H, Bando Y, Ikemoto T, Shimada M, Muguruma N, Takayama T. Cancer-associated adipocytes promote pancreatic cancer progression through SAA1 expression. Cancer Sci 2020; 111:2883-2894. [PMID: 32535957 PMCID: PMC7419047 DOI: 10.1111/cas.14527] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 05/02/2020] [Accepted: 06/04/2020] [Indexed: 12/16/2022] Open
Abstract
Although pancreatic cancer often invades peripancreatic adipose tissue, little information is known about cancer-adipocyte interaction. We first investigated the ability of adipocytes to de-differentiate to cancer-associated adipocytes (CAAs) by co-culturing with pancreatic cancer cells. We then examined the effects of CAA-conditioned medium (CAA-CM) on the malignant characteristics of cancer cells, the mechanism underlying those effects, and their clinical relevance in pancreatic cancer. When 3T3-L1 adipocytes were co-cultured with pancreatic cancer cells (PANC-1) using the Transwell system, adipocytes lost their lipid droplets and changed morphologically to fibroblast-like cells (CAA). Adipocyte-specific marker mRNA levels significantly decreased but those of fibroblast-specific markers appeared, characteristic findings of CAA, as revealed by real-time PCR. When PANC-1 cells were cultured with CAA-CM, significantly higher migration/invasion capability, chemoresistance, and epithelial-mesenchymal transition (EMT) properties were observed compared with control cells. To investigate the mechanism underlying these effects, we performed microarray analysis of PANC-1 cells cultured with CAA-CM and found a 78.5-fold higher expression of SAA1 compared with control cells. When the SAA1 gene in PANC-1 cells was knocked down with SAA1 siRNA, migration/invasion capability, chemoresistance, and EMT properties were significantly attenuated compared with control cells. Immunohistochemical analysis on human pancreatic cancer tissues revealed positive SAA1 expression in 46/61 (75.4%). Overall survival in the SAA1-positive group was significantly shorter than in the SAA1-negative group (P = .013). In conclusion, we demonstrated that pancreatic cancer cells induced de-differentiation in adipocytes toward CAA, and that CAA promoted malignant characteristics of pancreatic cancer via SAA1 expression, suggesting that SAA1 is a novel therapeutic target in pancreatic cancer.
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Affiliation(s)
- Masanori Takehara
- Department of Gastroenterology and OncologyInstitute of Biomedical SciencesTokushima University Graduate SchoolTokushima CityJapan
| | - Yasushi Sato
- Department of Gastroenterology and OncologyInstitute of Biomedical SciencesTokushima University Graduate SchoolTokushima CityJapan
| | - Tetsuo Kimura
- Department of Gastroenterology and OncologyInstitute of Biomedical SciencesTokushima University Graduate SchoolTokushima CityJapan
- Clinic Green HouseKochiJapan
| | - Kazuyoshi Noda
- Department of Gastroenterology and OncologyInstitute of Biomedical SciencesTokushima University Graduate SchoolTokushima CityJapan
| | - Hiroshi Miyamoto
- Department of Gastroenterology and OncologyInstitute of Biomedical SciencesTokushima University Graduate SchoolTokushima CityJapan
| | - Yasuteru Fujino
- Department of Gastroenterology and OncologyInstitute of Biomedical SciencesTokushima University Graduate SchoolTokushima CityJapan
| | - Jinsei Miyoshi
- Department of Gastroenterology and OncologyInstitute of Biomedical SciencesTokushima University Graduate SchoolTokushima CityJapan
| | - Fumika Nakamura
- Department of Gastroenterology and OncologyInstitute of Biomedical SciencesTokushima University Graduate SchoolTokushima CityJapan
| | - Hironori Wada
- Department of Gastroenterology and OncologyInstitute of Biomedical SciencesTokushima University Graduate SchoolTokushima CityJapan
| | - Yoshimi Bando
- Division of PathologyTokushima University HospitalTokushima CityJapan
| | - Tetsuya Ikemoto
- Department of SurgeryInstitute of Health BiosciencesTokushima University Graduate SchoolThe University of TokushimaTokushima CityJapan
| | - Mitsuo Shimada
- Department of SurgeryInstitute of Health BiosciencesTokushima University Graduate SchoolThe University of TokushimaTokushima CityJapan
| | - Naoki Muguruma
- Department of Gastroenterology and OncologyInstitute of Biomedical SciencesTokushima University Graduate SchoolTokushima CityJapan
| | - Tetsuji Takayama
- Department of Gastroenterology and OncologyInstitute of Biomedical SciencesTokushima University Graduate SchoolTokushima CityJapan
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17
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Matsuda R, Mizuguchi S, Nakamura F, Endo T, Isoda Y, Inamori G, Ota H. Highly stretchable sensing array for independent detection of pressure and strain exploiting structural and resistive control. Sci Rep 2020; 10:12666. [PMID: 32728079 PMCID: PMC7391712 DOI: 10.1038/s41598-020-69689-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [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: 04/02/2020] [Accepted: 07/06/2020] [Indexed: 11/29/2022] Open
Abstract
Stretchable physical sensors are crucial for the development of advanced electrical systems, particularly wearable devices and soft robotics. Currently available stretchable sensors that detect both pressure and strain are based on piezoelectric, piezoresistive, or piezocapacitive effects. The range of pressure sensing is 1–800 kPa with large deformations being within the range of deformations of parts of the human body, such as elbows and knees. However, these devices cannot easily allow simultaneous and independent detection of pressure and strain with sensor arrays at large tensions (> 50%) because strain affects the pressure signal. In this study, we propose a monolithic silicone-based array of pressure and strain sensors that can simultaneously and independently detect the in-plane biaxial tensile deformation and pressure. To realize these functionalities, the deformation of the device structure was optimized using a hetero-silicone substrate made of two types of silicone with different hardness characteristics and porous silicone bodies. In addition, the resistances of the sensors were controlled by adjusting a mixture based on carbon nanoparticles to improve the sensitivity and independence between the pressure and strain sensors. These concepts demonstrate the potential of this approach and its compatibility with the current architectures of stretchable physical sensors.
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Affiliation(s)
- Ryosuke Matsuda
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
| | - Satoru Mizuguchi
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
| | - Fumika Nakamura
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
| | - Takuma Endo
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
| | - Yutaka Isoda
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
| | - Go Inamori
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
| | - Hiroki Ota
- Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan. .,Graduate School of System Integration, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan.
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Alyamani M, Li J, Patel M, Taylor S, Nakamura F, Berk M, Przybycin C, Posadas EM, Madan RA, Gulley JL, Rini B, Garcia JA, Klein EA, Sharifi N. Deep androgen receptor suppression in prostate cancer exploits sexually dimorphic renal expression for systemic glucocorticoid exposure. Ann Oncol 2020; 31:369-376. [PMID: 32057540 DOI: 10.1016/j.annonc.2019.12.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [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: 10/06/2019] [Revised: 11/23/2019] [Accepted: 12/10/2019] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Enzalutamide and apalutamide are potent next-generation androgen receptor (AR) antagonists used in metastatic and non-metastatic prostate cancer. Metabolic, hormonal and immunologic effects of deep AR suppression are unknown. We hypothesized that enzalutamide and apalutamide suppress 11β-hydroxysteroid dehydrogenase-2 (11β-HSD2), which normally converts cortisol to cortisone, leading to elevated cortisol concentrations, increased ratio of active to inactive glucocorticoids and possibly suboptimal response to immunotherapy. On-treatment glucocorticoid changes might serve as an indicator of active glucocorticoid exposure and resultant adverse consequences. PATIENTS AND METHODS Human kidney tissues were stained for AR and 11β-HSD2 expression. Patients in three trials [neoadjuvant apalutamide plus leuprolide, enzalutamide ± PROSTVAC (recombinant poxvirus prostate-specific antigen vaccine) for metastatic castration-resistant prostate cancer (CRPC) and enzalutamide ± PROSTVAC for non-metastatic castration-sensitive prostate cancer] were analyzed for cortisol and its metabolites using liquid chromatography-mass spectrometry (LC-MS/MS). Progression-free survival was determined in the metastatic CRPC study of enzalutamide ± PROSTVAC for those with glucocorticoid changes above and below the median. RESULTS Concurrent AR and 11β-HSD2 expression occurs only in the kidneys of men. A statistically significant rise in cortisol concentration, cortisol/cortisone ratio and tetrahydrocortisol/tetrahydrocortisone ratio with AR antagonist treatment occurred uniformly across all three trials. In the trial of enzalutamide ± PROSTVAC for metastatic CRPC, high cortisol/cortisone ratio in the enzalutamide arm was associated with significantly improved progression-free survival. However, in the enzalutamide + PROSTVAC arm, the opposite trend was observed. CONCLUSION Enzalutamide and apalutamide treatment toggles renal 11β-HSD2 and significantly increases indicators of and exposure to biologically active glucocorticoids, which is associated with clinical outcomes.
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Affiliation(s)
- M Alyamani
- Genitourinary Malignancies Research Center, Lerner Research Institute, Cleveland Clinic, Cleveland, USA
| | - J Li
- Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, USA
| | - M Patel
- Genitourinary Malignancies Research Center, Lerner Research Institute, Cleveland Clinic, Cleveland, USA
| | - S Taylor
- Genitourinary Malignancies Research Center, Lerner Research Institute, Cleveland Clinic, Cleveland, USA
| | - F Nakamura
- Genitourinary Malignancies Research Center, Lerner Research Institute, Cleveland Clinic, Cleveland, USA
| | - M Berk
- Genitourinary Malignancies Research Center, Lerner Research Institute, Cleveland Clinic, Cleveland, USA
| | - C Przybycin
- Department of Pathology, Pathology and Laboratory Medicine Institute, Cleveland Clinic, Cleveland, USA
| | - E M Posadas
- Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, USA
| | - R A Madan
- Genitourinary Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, USA
| | - J L Gulley
- Genitourinary Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, USA
| | - B Rini
- Department of Hematology and Oncology, Taussig Cancer Institute, Cleveland Clinic, Cleveland, USA
| | - J A Garcia
- Department of Hematology and Oncology, Taussig Cancer Institute, Cleveland Clinic, Cleveland, USA
| | - E A Klein
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, USA
| | - N Sharifi
- Genitourinary Malignancies Research Center, Lerner Research Institute, Cleveland Clinic, Cleveland, USA; Department of Hematology and Oncology, Taussig Cancer Institute, Cleveland Clinic, Cleveland, USA; Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, USA.
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Miyamoto Y, Muguruma N, Fujimoto S, Okada Y, Kida Y, Nakamura F, Tanaka K, Nakagawa T, Kitamura S, Okamoto K, Miyamoto H, Sato Y, Takayama T. Epidermal growth factor receptor-targeted molecular imaging of colorectal tumors: Detection and treatment evaluation of tumors in animal models. Cancer Sci 2019; 110:1921-1930. [PMID: 30973663 PMCID: PMC6549923 DOI: 10.1111/cas.14020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 04/03/2019] [Accepted: 04/08/2019] [Indexed: 12/13/2022] Open
Abstract
To overcome the problem of overlooking colorectal tumors, a new and highly sensitive modality of colonoscopy is needed. Moreover, it is also important to establish a new modality to evaluate viable tumor volume in primary lesions of colorectal cancer (CRC) during chemotherapy. Therefore, we carried out molecular imaging of colorectal tumors targeting epidermal growth factor receptor (EGFR), which is highly expressed on tumor cells, for evaluating chemotherapeutic efficacy and for endoscopic detection of colorectal adenomas. We first attempted to image five CRC cell lines with various levels of EGFR expression using an Alexa Fluor-labeled anti-EGFR monoclonal antibody (AF-EGFR-Ab). A strong fluorescence signal was observed in the cells depending on the level of EGFR expression. When nude mice xenografted with LIM1215 CRC cells, which highly express EGFR, were i.v. injected with AF-EGFR-Ab, a strong fluorescence signal appeared in the tumor with a high signal to noise ratio, peaking at 48 hours after injection and then gradually decreasing, as shown using an IVIS Spectrum system. When the xenografted mice were treated with 5-fluorouracil, fluorescence intensity in the tumor decreased in proportion to the viable tumor cell volume. Moreover, when the colorectum of azoxymethane-treated rats was observed using a thin fluorescent endoscope with AF-EGFR-Ab, all 10 small colorectal adenomas (≤3 mm) were detected with a clear fluorescence signal. These preliminary results of animal experiments suggest that EGFR-targeted fluorescent molecular imaging may be useful for quantitatively evaluating cell viability in CRC during chemotherapy, and also for detecting small adenomas using a fluorescent endoscope.
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Affiliation(s)
- Yoshihiko Miyamoto
- Department of Gastroenterology and Oncology, University of Tokushima Faculty of Medicine Graduate School of Medical Sciences, Tokushima, Japan
| | - Naoki Muguruma
- Department of Gastroenterology and Oncology, University of Tokushima Faculty of Medicine Graduate School of Medical Sciences, Tokushima, Japan
| | - Shota Fujimoto
- Department of Gastroenterology and Oncology, University of Tokushima Faculty of Medicine Graduate School of Medical Sciences, Tokushima, Japan
| | - Yasuyuki Okada
- Department of Gastroenterology and Oncology, University of Tokushima Faculty of Medicine Graduate School of Medical Sciences, Tokushima, Japan
| | - Yoshifumi Kida
- Department of Gastroenterology and Oncology, University of Tokushima Faculty of Medicine Graduate School of Medical Sciences, Tokushima, Japan
| | - Fumika Nakamura
- Department of Gastroenterology and Oncology, University of Tokushima Faculty of Medicine Graduate School of Medical Sciences, Tokushima, Japan
| | - Kumiko Tanaka
- Department of Gastroenterology and Oncology, University of Tokushima Faculty of Medicine Graduate School of Medical Sciences, Tokushima, Japan
| | - Tadahiko Nakagawa
- Department of Health and Nutrition, University of Shimane Faculty of Nursing, Izumo, Japan
| | - Shinji Kitamura
- Department of Gastroenterology and Oncology, University of Tokushima Faculty of Medicine Graduate School of Medical Sciences, Tokushima, Japan
| | - Koichi Okamoto
- Department of Gastroenterology and Oncology, University of Tokushima Faculty of Medicine Graduate School of Medical Sciences, Tokushima, Japan
| | - Hiroshi Miyamoto
- Department of Gastroenterology and Oncology, University of Tokushima Faculty of Medicine Graduate School of Medical Sciences, Tokushima, Japan
| | - Yasushi Sato
- Department of Community Medicine for Gastroenterology and Oncology, Tokushima University Graduate School, Tokushima, Japan
| | - Tetsuji Takayama
- Department of Gastroenterology and Oncology, University of Tokushima Faculty of Medicine Graduate School of Medical Sciences, Tokushima, Japan
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Miyamoto H, Tanaka K, Nakamura F, Ikeda T, Kitamura S, Kimura T, Okamoto K, Sogabe M, Muguruma N, Bando Y, Takayama T. Massive hemobilia following plastic stent removal in common bile duct cancer associated with primary sclerosing cholangitis (with video). Clin J Gastroenterol 2018; 12:46-51. [PMID: 30056613 DOI: 10.1007/s12328-018-0888-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 07/24/2018] [Indexed: 11/11/2022]
Abstract
Hemobilia is defined as bleeding into the biliary tract. Herein, we report a very rare case of massive hemobilia following plastic stent (PS) removal in common bile duct (CBD) cancer. A 72-year-old man with primary sclerosing cholangitis had undergone repeated insertion of a PS into the CBD. Biliary tract biopsy was performed based on suspicion of combined CBD cancer. Biopsy revealed poorly differentiated adenocarcinoma of the CBD. One month after the biliary tract biopsy, he was admitted for acute cholangitis, and endoscopic retrograde cholangiography was performed for the exchange of the PS. When one of the two biliary PSs was removed, spurting bleeding from the major papilla began abruptly. The massive bleeding caused the patient to be in a pre-shock state. A retrieval balloon catheter was compressed against the papilla for hemostasis. Although he was treated conservatively, the patient developed a bloody discharge. Upper gastrointestinal endoscopy revealed that the pulsatile bleeding beside the PSs started immediately after the removal of the coagula. Emergent contrast-enhanced computed tomography showed right hepatic artery aneurysm across the CBD. Therefore, transarterial embolization was performed. The patient's post-therapeutic course was uneventful. He received chemotherapy, but died about a half year after hemobilia occurred.
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Affiliation(s)
- Hiroshi Miyamoto
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, Tokushima, 770-8503, Japan.
| | - Kumiko Tanaka
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, Tokushima, 770-8503, Japan
| | - Fumika Nakamura
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, Tokushima, 770-8503, Japan
| | - Takahiro Ikeda
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, Tokushima, 770-8503, Japan
| | - Shinji Kitamura
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, Tokushima, 770-8503, Japan
| | - Tetsuo Kimura
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, Tokushima, 770-8503, Japan
| | - Koichi Okamoto
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, Tokushima, 770-8503, Japan
| | - Masahiro Sogabe
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, Tokushima, 770-8503, Japan
| | - Naoki Muguruma
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, Tokushima, 770-8503, Japan
| | - Yoshimi Bando
- Department of Pathology, Tokushima University Hospital, Tokushima, Japan
| | - Tetsuji Takayama
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima, Tokushima, 770-8503, Japan.
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Yoshino T, Yamanaka T, Kotaka M, Manaka D, Eto T, Hasegawa J, Takagane A, Nakamura M, Kato T, Munemoto Y, Nakamura F, Bando H, Taniguchi H, Gamoh M, Shiozawa M, Sakamoto J, Saji S, Mizushima T, Ohtsu A, Mori M. Efficacy of 3 versus 6 months of oxaliplatin-based adjuvant chemotherapy for stage III colon cancer (CC): Results from phase III ACHIEVE trial as part of the International Duration Evaluation of Adjuvant therapy (IDEA) Collaboration. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx440.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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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22
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Nakao K, Yasuda S, Nishimura K, Noguchi T, Nakamura F, Nakai M, Sumita Y, Miyamoto Y, Ogawa H. P3656Association between prescription rates of guideline-directed medications and short-term outcome among 68182 Japanese patients with acute myocardial infarction. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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23
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Ueyama T, Arimura T, Takumi K, Nakamura F, Higashi R, Ito S, Fukukura Y, Umanodan T, Nakajo M, Koriyama C, Yoshiura T. EP-1215: Risk factors of radiation pneumonitis after SRT: the usefulness of the PTV to lung volume ratio. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31650-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Matsumoto Y, Miyamoto H, Fukuya A, Nakamura F, Goji T, Kitamura S, Kimura T, Okamoto K, Sogabe M, Muguruma N, Shimada M, Bando Y, Takayama T. Hemosuccus pancreaticus caused by a mucinous cystic neoplasm of the pancreas. Clin J Gastroenterol 2017; 10:185-190. [PMID: 28054178 DOI: 10.1007/s12328-016-0711-2] [Citation(s) in RCA: 7] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 12/22/2016] [Indexed: 12/18/2022]
Abstract
Hemosuccus pancreaticus is a gastrointestinal hemorrhage through the main pancreatic duct. Here, we report a rare case of hemosuccus pancreaticus due to a mucinous cystic neoplasm of the pancreas. A 62-year-old woman who had been followed for a branch duct intraductal papillary mucinous neoplasm visited our emergency room due to severe abdominal pain and bloody discharge. Computed tomography revealed that the pancreatic cyst increased the tension of the wall and a high-density area indicative of bleeding into the cyst was observed. Endoscopy showed opening of and hemorrhaging from the papilla of Vater. The patient was diagnosed with hemosuccus pancreaticus caused by hemorrhaging into the cyst from the branch duct intraductal papillary mucinous neoplasm. Based on this diagnosis, elective distal pancreatectomy was performed. The histopathological diagnosis was a mucinous cystic neoplasm with intermediate-grade dysplasia based upon the pathological findings that fibrous ovarian-type stroma existed abundantly and the stroma cells were positive for progesterone receptor and inhibin. Hemosuccus pancreaticus caused by a mucinous cystic neoplasm is extremely rare and there has been only one case reported to date. In conclusion, it should be recognized that pancreatic cystic neoplasms including mucinous cystic neoplasms may cause hemosuccus pancreaticus.
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Affiliation(s)
- Yuri Matsumoto
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, 770-8503, Japan
| | - Hiroshi Miyamoto
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, 770-8503, Japan.
| | - Akira Fukuya
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, 770-8503, Japan
| | - Fumika Nakamura
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, 770-8503, Japan
| | - Takahiro Goji
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, 770-8503, Japan
| | - Shinji Kitamura
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, 770-8503, Japan
| | - Tetsuo Kimura
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, 770-8503, Japan
| | - Koichi Okamoto
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, 770-8503, Japan
| | - Masahiro Sogabe
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, 770-8503, Japan
| | - Naoki Muguruma
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, 770-8503, Japan
| | - Mitsuo Shimada
- Department of Digestive and Pediatric Surgery, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Yoshimi Bando
- Department of Pathology, Tokushima University Hospital, Tokushima, Japan
| | - Tetsuji Takayama
- Department of Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, 770-8503, Japan.
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Cullings HM, Grant EJ, Egbert SD, Watanabe T, Oda T, Nakamura F, Yamashita T, Fuchi H, Funamoto S, Marumo K, Sakata R, Kodama Y, Ozasa K, Kodama K. DS02R1: Improvements to Atomic Bomb Survivors' Input Data and Implementation of Dosimetry System 2002 (DS02) and Resulting Changes in Estimated Doses. Health Phys 2017; 112:56-97. [PMID: 27906788 DOI: 10.1097/hp.0000000000000598] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Individual dose estimates calculated by Dosimetry System 2002 (DS02) for the Life Span Study (LSS) of atomic bomb survivors are based on input data that specify location and shielding at the time of the bombing (ATB). A multi-year effort to improve information on survivors' locations ATB has recently been completed, along with comprehensive improvements in their terrain shielding input data and several improvements to computational algorithms used in combination with DS02 at RERF. Improvements began with a thorough review and prioritization of original questionnaire data on location and shielding that were taken from survivors or their proxies in the period 1949-1963. Related source documents varied in level of detail, from relatively simple lists to carefully-constructed technical drawings of structural and other shielding and surrounding neighborhoods. Systematic errors were reduced in this work by restoring the original precision of map coordinates that had been truncated due to limitations in early data processing equipment and by correcting distortions in the old (WWII-era) maps originally used to specify survivors' positions, among other improvements. Distortion errors were corrected by aligning the old maps and neighborhood drawings to orthophotographic mosaics of the cities that were newly constructed from pre-bombing aerial photographs. Random errors that were reduced included simple transcription errors and mistakes in identifying survivors' locations on the old maps. Terrain shielding input data that had been originally estimated for limited groups of survivors using older methods and data sources were completely re-estimated for all survivors using new digital terrain elevation data. Improvements to algorithms included a fix to an error in the DS02 code for coupling house and terrain shielding, a correction for elevation at the survivor's location in calculating angles to the horizon used for terrain shielding input, an improved method for truncating high dose estimates to 4 Gy to reduce the effect of dose error, and improved methods for calculating averaged shielding transmission factors that are used to calculate doses for survivors without detailed shielding input data. Input data changes are summarized and described here in some detail, along with the resulting changes in dose estimates and a simple description of changes in risk estimates for solid cancer mortality. This and future RERF publications will refer to the new dose estimates described herein as "DS02R1 doses."
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Affiliation(s)
- H M Cullings
- *Department of Statistics, Radiation Effects Research Foundation, Hijiyama Park 5-2, Minami-ku, Hiroshima 732-0815, Japan; †Department of Epidemiology, Radiation Effects Research Foundation, Hijiyama Park 5-2, Minami-ku, Hiroshima 732-0815, Japan; ‡LEIDOS Corporation, San Diego, CA; §Department of Information Technology, Radiation Effects Research Foundation, Hijiyama Park 5-2, Minami-ku, Hiroshima 732-0815, Japan; **Biosample Center, Radiation Effects Research Foundation, Hijiyama Park 5-2, Minami-ku, Hiroshima 732-0815, Japan; ††Radiation Effects Research Foundation, Hijiyama Park 5-2, Minami-ku, Hiroshima 732-0815, Japan
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Funakoshi-Tago M, Ohsawa K, Ishikawa T, Nakamura F, Ueda F, Narukawa Y, Kiuchi F, Tamura H, Tago K, Kasahara T. Inhibitory effects of flavonoids extracted from Nepalese propolis on the LPS signaling pathway. Int Immunopharmacol 2016; 40:550-560. [DOI: 10.1016/j.intimp.2016.10.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 10/11/2016] [Accepted: 10/11/2016] [Indexed: 01/27/2023]
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Nishimura S, Mizuno H, Akashi T, Takata T, Nakamura F, Goda F, Mihara C, Sato H, Kurihara M, Sasaki M. MON-P192: Clinical Usefulness of New Type Formulathat Features a State Change from Liquid to Semi-Solidified in the Stomach. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30826-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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O’Flaherty M, Nakamura F, Nishimura K, Guzman-Castillo M, Sekikawa A, Capewell S, Miyamoto Y, Kuller L. OP81 Explaining the fall in coronary mortality in Japan between 1980 and 2012: IMPACT modelling analysis. Br J Soc Med 2016. [DOI: 10.1136/jech-2016-208064.81] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Suzuki Y, Tomita A, Nakamura F, Iriyama C, Shirahata-Adachi M, Shimada K, Akashi A, Ishikawa Y, Kaneda N, Kiyoi H. Peripheral blood cell-free DNA is an alternative tumor DNA source reflecting disease status in myelodysplastic syndromes. Cancer Sci 2016; 107:1329-37. [PMID: 27323954 PMCID: PMC5021037 DOI: 10.1111/cas.12994] [Citation(s) in RCA: 16] [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: 03/25/2016] [Revised: 06/13/2016] [Accepted: 06/17/2016] [Indexed: 12/17/2022] Open
Abstract
Genetic alterations in myelodysplastic syndromes (MDS) are critical for pathogenesis. We previously showed that peripheral blood cell-free DNA (PBcfDNA) may be more sensitive for genetic/epigenetic analyses than whole bone marrow (BM) cells and mononuclear cells in peripheral blood (PB). Here we analyzed the detailed features of PBcfDNA and its utility in genetic analyses in MDS. The plasma-PBcfDNA concentration in MDS and related diseases (N = 33) was significantly higher than that in healthy donors (N = 14; P = 0.041) and in International Prognostic Scoring System higher-risk groups than that in lower-risk groups (P = 0.034). The concentration of plasma-/serum-PBcfDNA was significantly correlated with the serum lactate dehydrogenase level (both P < 0.0001) and the blast cell count in PB (P = 0.034 and 0.025, respectively). One nanogram of PBcfDNA was sufficient for one assay of Sanger sequencing using optimized primer sets to amplify approximately 160-bp PCR products. PBcfDNA (approximately 50 ng) can also be utilized for targeted sequencing. Almost all mutations detected in BM-DNA were also detected using corresponding PBcfDNA. Analyses using serially harvested PBcfDNA from an RAEB-2 patient showed that the somatic mutations and a single nucleotide polymorphism that were detected before allogeneic transplantation were undetectable after transplantation, indicating that PBcfDNA likely comes from MDS clones that reflect the disease status. PBcfDNA may be a safer and easier alternative to obtain tumor DNA in MDS.
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Affiliation(s)
- Yasuhiro Suzuki
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Akihiro Tomita
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Fumika Nakamura
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan.,Department of Analytical Neurobiology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Chisako Iriyama
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Mizuho Shirahata-Adachi
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kazuyuki Shimada
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan.,Institute for Adavanced Research, Nagoya University, Nagoya, Japan
| | - Akimi Akashi
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yuichi Ishikawa
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Norio Kaneda
- Department of Analytical Neurobiology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Hitoshi Kiyoi
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Rosas F, Ramirez-Campillo R, Diaz D, Abad-Colil F, Martinez-Salazar C, Caniuqueo A, Cañas-Jamet R, Loturco I, Nakamura F, McKenzie C, Gonzalez-Rivera J, Sanchez-Sanchez J, Izquierdo M. Jump Training in Youth Soccer Players: Effects of Haltere Type Handheld Loading. Int J Sports Med 2016; 37:1060-1065. [DOI: 10.1055/s-0042-111046] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- F. Rosas
- Roses of Buenos Aires Sport Club, Buenos Aires, Argentina
| | - R. Ramirez-Campillo
- Department of Physical Activity Sciences, Universidad de Los Lagos, Osorno, Chile
| | - D. Diaz
- Faculty of Health, Universidad Santo Tomas, Osorno, Chile
| | - F. Abad-Colil
- Faculty of Physical Activity Sciences, Universidad San Sebastian, Valdivia, Chile
| | - C. Martinez-Salazar
- Department of Physical Education, Sport and Recreation, Universidad de la Frontera, Temuco, Chile
| | - A. Caniuqueo
- Laboratory of Physiology and Biomechanics, Universidad Autonoma de Chile, Temuco, Chile
| | - R. Cañas-Jamet
- Department of Biological Sciences, Faculty of Biological Sciences, Universidad Andres Bello, Santiago, Chile
| | - I. Loturco
- NAR – Nucleus of High Performance in Sport, Sport Science, São Paulo, Brazil
| | - F. Nakamura
- NAR – Nucleus of High Performance in Sport, Sport Science, São Paulo, Brazil
| | - C. McKenzie
- Sports Performance Research Institute, Auckland University of Technology, Auckland, New Zealand
| | - J. Gonzalez-Rivera
- Department of Sports Medicine, Goethe-University Frankfurt/Main, Frankfurt am Main, Germany
| | - J. Sanchez-Sanchez
- Faculty of Education, Universidad Pontificia de Salamanca, Salamanca, Spain
| | - M. Izquierdo
- Department of Health Sciences, Public University of Navarre, Tudela, Spain
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Maeda E, Nakamura F, Kobayashi Y, Boivin J, Sugimori H, Murata K, Saito H. Effects of fertility education on knowledge, desires and anxiety among the reproductive-aged population: findings from a randomized controlled trial. Hum Reprod 2016; 31:2051-60. [PMID: 27301362 PMCID: PMC4991656 DOI: 10.1093/humrep/dew133] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 05/17/2016] [Indexed: 11/15/2022] Open
Abstract
STUDY QUESTION What are the effects of fertility education on knowledge, childbearing desires and anxiety? SUMMARY ANSWER Providing fertility information contributed to greater knowledge, but increased anxiety. WHAT IS KNOWN ALREADY Past studies have found that exposure to educational material improved fertility awareness and changed desires toward childbearing and its timing. Existing educational websites with evidence-based medical information provided in a non-judgmental manner have received favorable responses from reproductive-aged men and women. STUDY DESIGN, SIZE, DURATION This three-armed (one intervention and two control groups), randomized controlled trial was conducted using online social research panels (SRPs) in Japan in January 2015. PARTICIPANTS/MATERIALS, SETTING, METHODS A total of 1455 participants (726 men and 729 women) between 20 and 39 years of age who hoped to have (more) children in the future were block-randomized and exposed to one of three information brochures: fertility education (intervention group), intake of folic acid during pregnancy (control group 1) or governmental financial support for pregnancy and childbirth (control group 2). Fertility knowledge was measured with the Japanese version of the Cardiff Fertility Knowledge Scale (CFKS-J). Knowledge, child-number and child-timing desires, subjective anxiety (i.e. whether participants felt anxiety [primary outcome]), and scores on the State-Trait Anxiety Inventory were assessed immediately after exposure. Non-inferiority comparisons were performed on subjective anxiety with non-inferiority declared if the upper limit of the two-sided 95% confidence interval (CI) for risk difference did not exceed a margin of 0.15. This test for non-inferiority was only performed for subjective anxiety; all the other variables were tests of superiority. MAIN RESULTS AND THE ROLE OF CHANCE Posttest scores on the CFKS-J (mean, SD) were higher in the intervention group than that of the control groups: intervention versus Control 1 and versus Control 2: 52.8 (28.8) versus 40.9 (26.2) (P< 0.001) versus 45.1 (27.1) (P = 0.003) among men and 64.6 (26.0) versus 50.8 (26.9) (P< 0.001) versus 53.0 (26.4) (P< 0.001) among women. The percentage of participants who felt subjective anxiety after exposure to the intervention brochure was significantly higher than that of the control groups: intervention versus Control 1 and versus Control 2: 32.6 versus 17.8% (risk difference [RD] = 0.149, 95% CI: 0.073–0.225) versus 14.5% (RD = 0.182, 95% CI: 0.108–0.256) among men, and 50.2 versus 26.3% (RD = 0.239, 95% CI: 0.155–0.322) versus 14.0% (RD = 0.362, 95% CI: 0.286–0.439) among women. Non-inferiority of the intervention was inconclusive (i.e. the CI included 0.15) among men whereas inferiority was declared among women. The incidence of anxiety was higher in the intervention group than that of the control groups especially among men aged 30 and older and among women aged 25 and older. No difference existed in childbearing desires between groups after exposure. LIMITATIONS, REASONS FOR CAUTION The possibility of selection bias associated with the use of SRPs (higher socioeconomic status and education) and volunteer bias toward those more interested in fertility may limit the generalizability of these findings. WIDER IMPLICATIONS OF THE FINDINGS In addition to education targeting a younger generation, psychological approaches are needed to alleviate possible anxiety caused by fertility information. STUDY FUNDING/COMPETING INTEREST(S) This study was funded by National Center for Child Health and Development, Seiiku Medical Study Grant (24-6), the Daiwa Foundation Small Grants and Grant-in-Aid for JSPS Fellows (26-1591). No competing interest declared. TRIAL REGISTRATION NUMBER UMIN Clinical Trials Registry. Trial registration number, 000016168. TRIAL REGISTRATION DATE 13 January 2015. DATE OF FIRST PATIENT'S ENROLMENT 15 January 2015.
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Affiliation(s)
- E Maeda
- Department of Environmental Health Sciences, Akita University Graduate School of Medicine, Akita 010-8543, Japan
| | - F Nakamura
- Department of Public Health, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Y Kobayashi
- Department of Public Health, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - J Boivin
- Cardiff Fertility Studies Research Group, School of Psychology, Cardiff University, Cardiff CF10 3AT, UK
| | - H Sugimori
- Department of Preventive Medicine, Graduate School of Sports and Health Sciences, Daito Bunka University, Saitama 355-8501, Japan
| | - K Murata
- Department of Environmental Health Sciences, Akita University Graduate School of Medicine, Akita 010-8543, Japan
| | - H Saito
- Center of Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo 157-0074, Japan
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Eto T, Kotaka M, Manaka D, Hasegawa J, Takagane A, Nakamura M, Kato T, Munemoto Y, Nakamura F, Bando H, Taniguchi H, Gamoh M, Shiozawa M, Yamanaka T, Mizushima T, Sakamoto J, Saji S, Mori M, Ohtsu A, Yoshino T. O-010 An international phase III randomized, non-inferiority trial comparing 3 vs 6 months of oxaliplatin-based adjuvant chemotherapy for colon cancer: compliance and safety of the phase III Japanese ACHIEVE trial. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw198.10] [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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Loturco I, Barbosa A, Nocentini R, Pereira L, Kobal R, Kitamura K, Abad C, Figueiredo P, Nakamura F. A Correlational Analysis of Tethered Swimming, Swim Sprint Performance and Dry-land Power Assessments. Int J Sports Med 2015; 37:211-8. [DOI: 10.1055/s-0035-1559694] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- I. Loturco
- NAR – Nucleus of High Performance in Sport, Sport Science, São Paulo, Brazil
| | - A. Barbosa
- Department of Sport Sciences, Faculty of Physical Education, State University of Campinas, Campinas, Brazil
| | - R. Nocentini
- Swimming Department, Paineiras of Morumbi Club, São Paulo, Brazil
| | - L. Pereira
- NAR – Nucleus of High Performance in Sport, Sport Science, São Paulo, Brazil
| | - R. Kobal
- Department of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
| | - K. Kitamura
- NAR – Nucleus of High Performance in Sport, Sport Science, São Paulo, Brazil
| | - C. Abad
- NAR – Nucleus of High Performance in Sport, Sport Science, São Paulo, Brazil
| | - P. Figueiredo
- Faculty of Sport, Centre of Research Education, Innovation and Intervention in Sport, University of Porto, Porto, Portugal
| | - F. Nakamura
- NAR – Nucleus of High Performance in Sport, Sport Science, São Paulo, Brazil
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Loturco I, Kobal R, Maldonado T, Piazzi A, Bottino A, Kitamura K, Abad C, Pereira L, Nakamura F. Jump Squat is More Related to Sprinting and Jumping Abilities than Olympic Push Press. Int J Sports Med 2015; 38:604-612. [DOI: 10.1055/s-0035-1565201] [Citation(s) in RCA: 13] [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: 10/22/2022]
Abstract
AbstractThe aim of this study was to test the relationships between jump squat (JS) and Olympic push press (OPP) power outputs and performance in sprint, squat jump (SJ), countermovement jump (CMJ) and change of direction (COD) speed tests in elite soccer players. 27 athletes performed a maximum power load test to determine their bar mean propulsive power (MPP) and bar mean propulsive velocity (MPV) in the JS and OPP exercises. Magnitude-based inference was used to compare the exercises. The MPV was almost certainly higher in the OPP than in the JS. The MPP relative to body mass (MPP REL) was possibly higher in the OPP. Only the JS MPP REL presented very large correlations with linear speed (r>0.7, for speed in 5, 10, 20 and 30 m) and vertical jumping abilities (r>0.8, for SJ and CMJ), and moderate correlation with COD speed (r=0.45). Although significant (except for COD), the associations between OPP outcomes and field-based measurements (speed, SJ and CMJ) were all moderate, ranging from 0.40 to 0.48. In a group composed of elite soccer players, the JS exercise is more associated with jumping and sprinting abilities than the OPP. Longitudinal studies are needed to confirm if these strong relationships imply superior training effects in favor of the JS exercise.
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Affiliation(s)
- I. Loturco
- NAR – Nucleus of High Performance in Sport, Sport Science, São Paulo, Brazil
| | - R. Kobal
- NAR – Nucleus of High Performance in Sport, Sport Science, São Paulo, Brazil
| | - T. Maldonado
- SEP – Palmeiras Sport Society, Department of Professional Soccer, São Paulo, Brazil
| | - A. Piazzi
- SEP – Palmeiras Sport Society, Department of Professional Soccer, São Paulo, Brazil
| | - A. Bottino
- SEP – Palmeiras Sport Society, Department of Professional Soccer, São Paulo, Brazil
| | - K. Kitamura
- NAR – Nucleus of High Performance in Sport, Sport Science, São Paulo, Brazil
| | - C. Abad
- NAR – Nucleus of High Performance in Sport, Sport Science, São Paulo, Brazil
| | - L. Pereira
- NAR – Nucleus of High Performance in Sport, Sport Science, São Paulo, Brazil
| | - F. Nakamura
- NAR – Nucleus of High Performance in Sport, Sport Science, São Paulo, Brazil
- Departamento de Educação Física, Universidade Estadual de Londrina, Londrina, Brazil
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Ishiguro A, Yuki S, Kawamoto Y, Nakamura F, Takahashi N, Shichinohe T, Kusumi T, Sogabe S, Hatanaka K, Misawa K, Nenohi M, Hayashi H, Fukushima H, Takahashi M, Amano T, Ito Y, Sakamoto N, Taketomi A, Hirano S, Komatsu Y. 163P Safety analysis of FOLFOX as adjuvant chemotherapy for stage III colon cancer in phase II study (NORTH/HGCSG1003) - an analysis of surgeons vs oncologists. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv523.24] [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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36
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Leicht A, Sinclair W, McGuckin T, Nakamura F. Reliability of a repeat sprint ability protocol on a non-motorised treadmill in young, healthy, active adults. J Sci Med Sport 2015. [DOI: 10.1016/j.jsams.2015.12.459] [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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Tsukada Y, Nakamura F, Iwamoto M, Terahara A, Higashi T. Treatment Patterns for T4 Stage III Esophageal Cancer in Japan: Analysis From 233 Designated Cancer Care Hospitals. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.909] [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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38
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Nakamura F, Nishimura K, Watanabe M, Kokubo Y, Higashiyama A, Takegami M, Nakao YM, Nakai M, Okamura T, Miyamoto Y. Stroke risk assessment tool including chronic kidney disease improve a predictive probability. Eur J Public Health 2015. [DOI: 10.1093/eurpub/ckv175.171] [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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Candido N, Okuno N, da Silva C, Machado F, Nakamura F. Reliability of the Heart Rate Variability Threshold using Visual Inspection and Dmax Methods. Int J Sports Med 2015; 36:1076-80. [DOI: 10.1055/s-0035-1554642] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- N. Candido
- Departamento de Educação Física, Universidade Estadual de Maringá, Maringá, Brazil
| | - N. Okuno
- Departamento de Educação Física, Universidade Estadual de Ponta Grossa, Ponta Grossa, Brazil
| | - C. da Silva
- Departamento de Educação Física, Universidade Estadual do Norte do Paraná- (UENP), Jacarezinho, Brazil
| | - F. Machado
- Departamento de Educação Física, Universidade Estadual de Maringá, Maringá, Brazil
| | - F. Nakamura
- Departamento de Educação Física, Universidade Estadual de Londrina, Londrina, Brazil
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Ishiyama N, Sueyoshi M, Nakamura F. To what extent do human-altered landscapes retain population connectivity? Historical changes in gene flow of wetland fish Pungitius pungitius. R Soc Open Sci 2015; 2:150033. [PMID: 26587264 PMCID: PMC4632577 DOI: 10.1098/rsos.150033] [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] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Accepted: 06/08/2015] [Indexed: 06/05/2023]
Abstract
Understanding how human-altered landscapes affect population connectivity is valuable for conservation planning. Natural connectivity among wetlands, which is maintained by floods, is disappearing owing to farmland expansion. Using genetic data, we assessed historical changes in the population connectivity of the ninespine stickleback within a human-altered wetland system. We predicted that: (i) the contemporary gene flow maintained by the artificial watercourse network may be restricted to a smaller spatial scale compared with the gene flow preceding alteration, and (ii) the contemporary gene flow is dominated by the downstream direction owing to the construction of low-head barriers. We evaluated the potential source population in both timescales. Seventeen studied populations were grouped into four genetically different clusters, and we estimated the migration rates among these clusters. Contemporary migration was restricted to between neighbouring clusters, although a directional change was not detected. Furthermore, we consistently found the same potential source cluster, from past to present, characterized by large amounts of remnant habitats connected by artificial watercourses. These findings highlight that: (i) artificial connectivity can sustain the short-distance connectivity of the ninespine stickleback, which contributes to maintaining the potential source populations; however, (ii) population connectivity throughout the landscape has been prevented by agricultural developments.
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Affiliation(s)
- N. Ishiyama
- Author for correspondence: N. Ishiyama e-mail:
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Iioka F, Shimomura D, Nakamura F, Ohno H, Yada K, Nogami K, Shima M. Long-term treatment course of a patient with mild haemophilia A who developed a high titre factor VIII inhibitor. Haemophilia 2015; 20:e402-4. [PMID: 25354772 PMCID: PMC4232888 DOI: 10.1111/hae.12491] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/28/2014] [Indexed: 01/10/2023]
Affiliation(s)
- F Iioka
- Department of Hematology, Tenri Hospital, Tenri, Nara, Japan
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Iwanaga I, Yuki S, Fukushima H, Takahashi N, Shichinohe T, Kusumi T, Nakamura F, Sogabe S, Hatanaka K, Oomori K, Misawa K, Senmaru N, Iwai K, Shinohara T, Koike M, Miyashita K, Amano T, Ito Y, Sakamoto N, Taketomi A, Hirano S, Komatsu Y. P-249 Safety analysis of FOLFOX as adjuvant chemotherapy for stage III colon cancer in phase II study (NORTH/HGCSG1003) - an analysis of surgeons vs oncologists. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv233.246] [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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Kawade D, Moriyama K, Nakamura F, Chichibu SF, Sugiyama M. Fabrication of visible-light transparent solar cells composed of NiO/Nix
Zn1-x
O/ZnO heterostructures. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pssc.201400256] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Hiroshima Y, Miyamoto H, Nakamura F, Masukawa D, Yamamoto T, Muraoka H, Kamiya M, Yamashita N, Suzuki T, Matsuzaki S, Endo I, Goshima Y. The protein Ocular albinism 1 is the orphan GPCR GPR143 and mediates depressor and bradycardic responses to DOPA in the nucleus tractus solitarii. Br J Pharmacol 2014; 171:403-14. [PMID: 24117106 DOI: 10.1111/bph.12459] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2013] [Revised: 09/12/2013] [Accepted: 09/30/2013] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND AND PURPOSE L-DOPA is generally considered to alleviate the symptoms of Parkinson's disease by its conversion to dopamine. We have proposed that DOPA is itself a neurotransmitter in the CNS. However, specific receptors for DOPA have not been identified. Recently, the gene product of ocular albinism 1 (OA1) was found to exhibit DOPA-binding activity. Here, we have investigated whether OA1 is a functional receptor of DOPA in the nucleus tractus solitarii (NTS). EXPERIMENTAL APPROACH We examined immunohistochemical expression of OA1 in the NTS, and the effects of DOPA microinjected into the depressor sites of NTS on blood pressure and heart rate in anaesthetized rats, with or without prior knock-down of OA1 in the NTS, using shRNA against OA1. KEY RESULTS Using a specific OA1 antibody, OA1-positive cells and nerve fibres were found in the depressor sites of the NTS. OA1 expression in the NTS was markedly suppressed by microinjection into the NTS of adenovirus vectors carrying the relevant shRNA sequences against OA1. In animals treated with OA1 shRNA, depressor and bradycardic responses to DOPA, but not those to glutamate, microinjected into the NTS were blocked. Bilateral injections into the NTS of DOPA cyclohexyl ester, a competitive antagonist against OA1, suppressed phenylephrine-induced bradycardic responses without affecting blood pressure responses. CONCLUSION AND IMPLICATIONS OA1 acted as a functional receptor for DOPA in the NTS, mediating depressor and bradycardic responses. Our results add to the evidence for a central neurotransmitter role for DOPA, without conversion to dopamine.
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Affiliation(s)
- Y Hiroshima
- Department of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan; Department of Molecular Pharmacology and Neurobiology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
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Kawada H, Kurita N, Nakamura F, Kawamura J, Hasegawa S, Kotake K, Sugihara K, Fukuhara S, Sakai Y. Incorporation of apical lymph node status into the seventh edition of the TNM classification improves prediction of prognosis in stage III colonic cancer. Br J Surg 2014; 101:1143-52. [DOI: 10.1002/bjs.9548] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/04/2014] [Indexed: 11/06/2022]
Abstract
Abstract
Background
The node classification outlined in the seventh edition of the TNM classification is based solely on the number of metastasized lymph nodes. This study examined the prognostic value of apical lymph node (ALN) metastasis and the additional value of incorporating ALN status into a risk model based on the seventh edition.
Methods
This was a cohort study of patients with stage III colonic cancer who underwent tumour resection with dissection of regional (including apical) lymph nodes at 71 hospitals across Japan between 2000 and 2002. The main exposure was pathologically confirmed ALN metastasis, and the primary endpoint was cancer-specific death.
Results
ALN metastasis was present in 113 (8·3 per cent) of 1355 patients. During 5356 patient-years of follow-up (median 5·0 years), 221 instances (16·3 per cent) of cancer-specific death were observed. After adjustment for tumour and node classification (as described in the seventh edition of the TNM classification) and other prognostic factors, ALN metastasis was found to be independently associated with cancer-specific death (hazard ratio 2·29, 95 per cent confidence interval (c.i.) 1·49 to 3·52). Incorporation of ALN metastasis into the prognostic model based on the seventh edition of the TNM classification significantly improved discriminative performance for cancer-specific death (difference in concordance index 0·0146, 95 per cent c.i. 0·0030 to 0·0262) and risk reclassification for cancer-specific death at 5 years (category-free net reclassification improvement 19·4 (95 per cent c.i. 5·0 to 33·4) per cent).
Conclusion
Assessment of ALN metastasis provided independent prognostic information beyond that achievable with the seventh edition of the TNM classification in patients with stage III colonic cancer.
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Affiliation(s)
- H Kawada
- Department of Surgery, Kyoto University, Kyoto, Japan
| | - N Kurita
- Department of Healthcare Epidemiology, School of Public Health, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- Centre for Innovative Research for Communities and Clinical Excellence, Fukushima Medical University, Fukushima, Japan
| | - F Nakamura
- Department of Public Health, University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - J Kawamura
- Department of Surgery, Kyoto University, Kyoto, Japan
| | - S Hasegawa
- Department of Surgery, Kyoto University, Kyoto, Japan
| | - K Kotake
- Department of Surgery, Tochigi Cancer Centre, Utsunomiya, Tochigi, Japan
| | - K Sugihara
- Department of Surgical Oncology, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - S Fukuhara
- Department of Healthcare Epidemiology, School of Public Health, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- Centre for Innovative Research for Communities and Clinical Excellence, Fukushima Medical University, Fukushima, Japan
| | - Y Sakai
- Department of Surgery, Kyoto University, Kyoto, Japan
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Umegaki K, Matsuura T, Takao S, Nihongi H, Yamada T, Miyamoto N, Shimizu S, Matsuda K, Nakamura F, Umezawa M, Hiramoto K, Shirato H. SU-D-BRE-02: Development and Commissioning of A Gated Spot Scanning Proton Beam Therapy System with Real-Time Tumor-Tracking. Med Phys 2014. [DOI: 10.1118/1.4887872] [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: 11/07/2022] Open
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Abstract
Enterostatin (VPDPR), an anorexigenic peptide derived from the amino terminus of procolipase, significantly inhibited analgesia induced by the mu-opioid agonist morphine (5 mg/kg, s.c.) after i.c.v. administration to mice at a dose of 100 nmol. On the other hand, VPDPR (approximately 200 nmol, i.c.v.) did not attenuate analgesia induced by the kappa-opioid agonist D-Phe-D-Phe-D-Nle-D-Arg-NH2 (100 microg/mouse, i.c.v.) or delta-opioid agonist DTLET (4 nmol/mouse, i.c.v.). VPDPR (100 nmol, i.c.v.) significantly improved amnesia induced by scopolamine (0.2 mg/kg, i.p.) in mice. However, VPDPR did not enhance memory in normal mice at the same dose.
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Affiliation(s)
- Y Takenaka
- Research Institute for Food Science, Kyoto University, Uji, Japan
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Abad C, do Nascimento A, Gil S, Kobal R, Loturco I, Nakamura F, Mostarda C, Irigoyen M. Cardiac Autonomic Control in High Level Brazilian Power and Endurance Track-and-Field Athletes. Int J Sports Med 2014; 35:772-8. [DOI: 10.1055/s-0033-1363268] [Citation(s) in RCA: 6] [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: 10/25/2022]
Affiliation(s)
- C. Abad
- NAR – Nucleus of High Performance in Sport, São Paulo, Brazil
| | | | - S. Gil
- NAR – Nucleus of High Performance in Sport, São Paulo, Brazil
| | - R. Kobal
- NAR – Nucleus of High Performance in Sport, São Paulo, Brazil
| | - I. Loturco
- NAR – Nucleus of High Performance in Sport, São Paulo, Brazil
| | - F. Nakamura
- Departamento de Educação Física, Universidade Estadual de Londrina, Londrina, Brazil
| | - C. Mostarda
- Hospital Materno Infantil, Universidade Federal do Maranhão, São Luis, Brazil
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Kitamura S, Muguruma N, Okamoto K, Nakamura F, Okada Y, Kimura T, Miyamoto H, Takayama T. Endoscopic submucosal dissection through a gastrostomy for early gastric cancer in patients with pharyngeal stenosis. Gastrointest Endosc 2014; 79:206-7. [PMID: 24129250 DOI: 10.1016/j.gie.2013.09.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Accepted: 09/17/2013] [Indexed: 12/11/2022]
Affiliation(s)
- Shinji Kitamura
- Department of Gastroenterology and Oncology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima City, Japan
| | - Naoki Muguruma
- Department of Gastroenterology and Oncology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima City, Japan
| | - Koichi Okamoto
- Department of Gastroenterology and Oncology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima City, Japan
| | - Fumika Nakamura
- Department of Gastroenterology and Oncology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima City, Japan
| | - Yasuyuki Okada
- Department of Gastroenterology and Oncology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima City, Japan
| | - Tetsuo Kimura
- Department of Gastroenterology and Oncology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima City, Japan
| | - Hiroshi Miyamoto
- Department of Gastroenterology and Oncology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima City, Japan
| | - Tetsuji Takayama
- Department of Gastroenterology and Oncology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima City, Japan
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Nakata K, Nakamura F, Ohkoshi Y, Gotoh Y, Nagura M, Hamano A, Takada S, Kikutani T. High-Strength PET Fibers Produced by Conjugated Melt Spinning and Laser Drawing. INT POLYM PROC 2013. [DOI: 10.3139/217.2573] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
The mechanical properties of conjugated-spun and laser drawn poly(ethylene terephthalate) (PET) fibers were investigated. The as-spun fibers used for the laser drawing were made by conjugated melt spinning with the copolymer of p-hydroxybenzoicacid and 2-hydroxy-6-naphthoicacid or polystyrene. The PET fibers prepared by conjugated spinning could be laser drawn to higher draw ratios under lower drawing stresses. The drawn fiber could be re-drawn up to a higher total draw ratio. Thus, a PET fiber having a tensile strength of 1.14 N/tex could be produced.
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Affiliation(s)
- K. Nakata
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - F. Nakamura
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - Y. Ohkoshi
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - Y. Gotoh
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - M. Nagura
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - A. Hamano
- Japan Chemical Innovation Institute, Tokyo, Japan
| | - S. Takada
- Japan Chemical Innovation Institute, Tokyo, Japan
| | - T. Kikutani
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Tokyo, Japan
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