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Kondo A, Takenaka Y, Fujiwara A, Takahashi S, Kitade-Miyayama M, Morifuji M, Kawashima M, Ishiguro N. Changes in the composition of molecular species of covalently bound and free ceramides [EOS], and their correlation with disease severity in atopic dermatitis. Exp Dermatol 2024; 33:e15025. [PMID: 38450766 DOI: 10.1111/exd.15025] [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] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 01/11/2024] [Accepted: 01/14/2024] [Indexed: 03/08/2024]
Abstract
Ceramides are major constituents of stratum corneum (SC) intercellular lipids involved in skin barrier function. The ratio of molecular species of ceramides and their correlation with disease severity was examined in patients with atopic dermatitis (AD). Thirty-eight patients with AD and 32 healthy controls (HCs) were assessed for transepidermal water loss, SC collection and clinical assessment. The ceramide content of different molecular species in the samples was quantified using high-performance liquid chromatography coupled with tandem mass spectrometry. Unsaturated acyl chains of both covalently bound and free ceramides [EOS] were higher in AD lesional skin than those in AD non-lesional or normal HC skin. The proportion of unsaturated acyl chains (C30:1, C32:1 and C34:1) was higher than other ceramide molecular species among covalently bound and free ceramides [EOS] in patients with AD. The proportion of unsaturated acyl chains in covalently bound ceramides was positively correlated with transepidermal water loss (r = 0.600) when considering the total number of non-lesional and lesional skin. Additionally, thymus and activation-regulated chemokine (TARC) showed a positive correlation with unsaturated acyl chains proportion in AD non-lesional (r = 0.676) and lesional (r = 0.503) skin. Our study is the first to show the increase in unsaturated acyl chains of both covalently bound and free ceramides [EOS] in lesional and non-lesional skin in AD for each molecular species. This increase is associated with dryness and impaired barrier function, which correlates with TARC levels, a marker for the degree of type 2 inflammation. We speculate that type 2 inflammation exacerbation leads to abnormal epidermal lipid metabolism in the skin of patients with AD.
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Affiliation(s)
- A Kondo
- Department of Dermatology, Tokyo Women's Medical University, Shinjuku-ku, Japan
| | - Y Takenaka
- Department of Dermatology, Tokyo Women's Medical University, Shinjuku-ku, Japan
| | - A Fujiwara
- Food Microbiology and Function Research Labs, Meiji Co., Ltd., Hachioji-city, Japan
| | - S Takahashi
- Food Microbiology and Function Research Labs, Meiji Co., Ltd., Hachioji-city, Japan
| | - M Kitade-Miyayama
- Food Microbiology and Function Research Labs, Meiji Co., Ltd., Hachioji-city, Japan
| | - M Morifuji
- Food Microbiology and Function Research Labs, Meiji Co., Ltd., Hachioji-city, Japan
| | - M Kawashima
- Tokyo Women's Medical University, Shinjuku-ku, Japan
| | - N Ishiguro
- Department of Dermatology, Tokyo Women's Medical University, Shinjuku-ku, Japan
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2
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Shimura M, Higashi-Kuwata N, Fujiwara A, Taniguchi M, Ichinose T, Hamano F, Uematsu M, Inoue T, Matsuyama S, Suzuki T, Ghosh AK, Shindou H, Shimuzu T, Mitsuya H. A lipid index for risk of hyperlipidemia caused by anti-retroviral drugs. Antiviral Res 2024; 223:105819. [PMID: 38272319 DOI: 10.1016/j.antiviral.2024.105819] [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] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/14/2024] [Accepted: 01/20/2024] [Indexed: 01/27/2024]
Abstract
HIV-associated lipodystrophy has been reported in people taking anti-retroviral therapy (ART). Lipodystrophy can cause cardiovascular diseases, affecting the quality of life of HIV-infected individuals. In this study, we propose a pharmacological lipid index to estimate the risk of hyperlipidemia caused by anti-retroviral drugs. Lipid droplets were stained in cells treated with anti-retroviral drugs and cyclosporin A. Signal intensities of lipid droplets were plotted against the drug concentrations to obtain an isodose of 10 μM of cyclosporin A, which we call the Pharmacological Lipid Index (PLI). The PLI was then normalized by EC50. PLI/EC50 values were low in early proteinase inhibitors and the nucleoside reverse transcriptase inhibitor, d4T, indicating high risk of hyperlipidemia, which is consistent with previous findings of hyperlipidemia. In contrast, there are few reports of hyperlipidemia for drugs with high PLI/EC50 scores. Data suggests that PLI/EC50 is a useful index for estimating the risk of hyperlipidemia.
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Affiliation(s)
- Mari Shimura
- Research Institute, National Center for Global Health and Medicine, Shinjuku, Tokyo, Japan; RIKEN SPring-8 Center, Sayo, Hyogo, Japan.
| | - Nobuyo Higashi-Kuwata
- Department of Refractory Viral Diseases, National Center for Global Health and Medicine, Shinjuku, Tokyo, Japan
| | - Asuka Fujiwara
- Department of Refractory Viral Diseases, National Center for Global Health and Medicine, Shinjuku, Tokyo, Japan
| | - Mai Taniguchi
- Inorganic Analysis Laboratories, Toray Research Center, Inc., Otsu, Shiga, Japan
| | - Takayuki Ichinose
- Inorganic Analysis Laboratories, Toray Research Center, Inc., Otsu, Shiga, Japan
| | - Fumie Hamano
- Life Sciences Core Facility, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan; Department of Lipid Signaling, Research Institute, National Center for Global Health and Medicine, Shinjuku, Tokyo, Japan
| | - Masaaki Uematsu
- Department of Lipid Signaling, Research Institute, National Center for Global Health and Medicine, Shinjuku, Tokyo, Japan
| | - Takato Inoue
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Satoshi Matsuyama
- RIKEN SPring-8 Center, Sayo, Hyogo, Japan; Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Takahiro Suzuki
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Japan
| | - Arun K Ghosh
- Department of Chemistry & Department of Medicinal Chemistry, Purdue University, West Lafayette, IN, 47907, USA
| | - Hideo Shindou
- Department of Lipid Life Science, Research Institute, National Center for Global Health and Medicine, Shinjuku, Tokyo, Japan; Department of Medical Lipid Science, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Takao Shimuzu
- Department of Lipid Signaling, Research Institute, National Center for Global Health and Medicine, Shinjuku, Tokyo, Japan; Institute of Microbial Chemistry, Shinagawa-ku, Tokyo, Japan
| | - Hiroaki Mitsuya
- Department of Refractory Viral Diseases, National Center for Global Health and Medicine, Shinjuku, Tokyo, Japan; Experimental Retrovirology Section, HIV and AIDS Malignancy Branch, National Center Institute, National Institutes of Health, Bethesda, MD, 20893, USA.
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Nishimura T, Fujimoto H, Fujiwara T, Ito K, Fujiwara A, Yuda H, Itani H, D'Alessandro-Gabazza C, Gabazza E, Kobayashi T. 1535P Efficacy and safety of amrubicin after treatment with immune checkpoint inhibitor combined with chemotherapy in extensive-stage small cell carcinoma: MiSSION1. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Li S, Coffinier Y, Lagadec C, Cleri F, Nishiguchi K, Fujiwara A, Fujii T, Kim SH, Clément N. Redox-labelled electrochemical aptasensors with nanosupported cancer cells. Biosens Bioelectron 2022; 216:114643. [PMID: 36030742 DOI: 10.1016/j.bios.2022.114643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 07/31/2022] [Accepted: 08/16/2022] [Indexed: 11/30/2022]
Abstract
The transfer of redox-labelled bioelectrochemical sensors from proteins to cells is not straightforward because of the cell downward force issue on the surface of the sensors. In this paper, 20-nm-thick nanopillars are introduced to overcome this issue, in a well-controlled manner. We show on both molecular dynamics simulations and experiments that suspending cells a few nanometers above an electrode surface enables redox-labelled tethered DNA aptamer probes to move freely, while remaining at an interaction distance from a target membrane protein, i. e. epithelial cell adhesion molecule (EpCAM), which is typically overexpressed in cancer cells. By this nanopillar configuration, the interaction of aptamer with cancer cells is clearly observable, with 13 cells as the lower limit of detection. Nanoconfinement induced by the gap between the electrode surface and the cell membrane appears to improve the limit of detection and to lower the melting temperature of DNA aptamer hairpins, offering an additional degree of freedom to optimize molecular recognition mechanisms. This novel nanosupported electrochemical DNA cell sensor scheme including Brownian-fluctuating redox species opens new opportunities for the design of all-electrical sensors using redox-labelled probes.
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Affiliation(s)
- S Li
- IIS, LIMMS/CNRS-IIS IRL2820, The Univ. of Tokyo, 4-6-1 Komaba, Meguro-ku Tokyo, 153-8505, Japan.
| | - Y Coffinier
- IEMN, CNRS UMR8520, Univ. Lille Avenue Poincaré, BP 60069, Villeneuve D'Ascq Cedex, 59652, France
| | - C Lagadec
- Univ. Lille, CNRS, Inserm, CHU Lille, Centre Oscar Lambret, UMR9020 - UMR-S 1277 - Canther - Cancer Heterogeneity, Plasticity and Resistance to Therapies, F-59000, Lille, France
| | - F Cleri
- IEMN, CNRS UMR8520, Univ. Lille Avenue Poincaré, BP 60069, Villeneuve D'Ascq Cedex, 59652, France
| | - K Nishiguchi
- NTT Basic Research Laboratories, NTT Corporation, 3-1, Morinosato-Wakamiya, Atsugi-shi, 243-0198, Japan
| | - A Fujiwara
- NTT Basic Research Laboratories, NTT Corporation, 3-1, Morinosato-Wakamiya, Atsugi-shi, 243-0198, Japan
| | - T Fujii
- IIS, LIMMS/CNRS-IIS IRL2820, The Univ. of Tokyo, 4-6-1 Komaba, Meguro-ku Tokyo, 153-8505, Japan
| | - S-H Kim
- IIS, LIMMS/CNRS-IIS IRL2820, The Univ. of Tokyo, 4-6-1 Komaba, Meguro-ku Tokyo, 153-8505, Japan
| | - N Clément
- IIS, LIMMS/CNRS-IIS IRL2820, The Univ. of Tokyo, 4-6-1 Komaba, Meguro-ku Tokyo, 153-8505, Japan.
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Jonan S, Hamouda N, Fujiwara A, Iwata K, Fujita T, Kato S, Amagase K. Alleviative effects of glutamate against chemotherapeutic agent-induced intestinal mucositis. J Physiol Pharmacol 2022; 73. [PMID: 36696244 DOI: 10.26402/jpp.2022.4.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 08/30/2022] [Indexed: 01/26/2023]
Abstract
5-Fluorouracil (5-FU) is one of the most widely used chemotherapeutic agents; however, it often causes intestinal mucositis with severe diarrhea. An efficient treatment strategy to reduce this side effect is lacking. Glutamate (Glu), a nonessential amino acid, is the most important energy source in the small intestine and has been shown to maintain intestinal morphology, barrier function, and antioxidative capacity. However, the effects of Glu on intestinal mucositis induced by chemotherapeutic agents have not been explored. This study aimed to demonstrate the alleviative effects of Glu on 5-FU-induced intestinal mucositis. Mucositis was induced in C57B/6N mice by intraperitoneal injection of 5-FU (50 mg/kg) for 6 days and assessed by histological and physiological analyses. Glu (500 or 1000 mg/kg) was orally administered as a pretreatment twice daily for 7 days before the initial treatment of 5-FU. Cellular proliferation and apoptosis were assessed using Ki-67 immunostaining and terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay, respectively. Furthermore, fluorescein isothiocyanate-dextran infiltration was assessed to measure intestinal permeability. In vitro experiments using rat intestinal epithelial cells (IEC-6 cells) were performed to clarify the effect of Glu on 5-FU-induced barrier dysfunction. Glu alleviated 5-FU-induced intestinal mucositis by reducing villi shortening, enhancing cell proliferation, and suppressing apoptosis. It also alleviated the 5-FU-induced increased intestinal permeability. In vitro studies revealed significantly increased trans-epithelial electrical resistance (TEER) in Glu-pretreated IEC-6 cells compared to that in 5-FU-treated and control cells. In conclusion, the findings of this study provide evidence for the potential of Glu to protect against 5-FU-induced intestinal mucositis in patients with cancer.
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Affiliation(s)
- S Jonan
- Laboratory of Pharmacology and Pharmacotherapeutics, Graduate School of Pharmaceutical Sciences, Ritsumeikan University, Shiga, Japan
| | - N Hamouda
- Laboratory of Pharmacology and Pharmacotherapeutics, Graduate School of Pharmaceutical Sciences, Ritsumeikan University, Shiga, Japan
| | - A Fujiwara
- Laboratory of Pharmacology and Pharmacotherapeutics, Graduate School of Pharmaceutical Sciences, Ritsumeikan University, Shiga, Japan
| | - K Iwata
- Department of Pharmacology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - T Fujita
- Laboratory of Molecular Pharmacokinetics, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, Japan
| | - S Kato
- Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, Kyoto, Japan
| | - K Amagase
- Laboratory of Pharmacology and Pharmacotherapeutics, Graduate School of Pharmaceutical Sciences, Ritsumeikan University, Shiga, Japan.
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Maeda K, Amano M, Uemura Y, Tsuchiya K, Matsushima T, Noda K, Shimizu Y, Fujiwara A, Takamatsu Y, Ichikawa Y, Nishimura H, Kinoshita M, Matsumoto S, Gatanaga H, Yoshimura K, Oka SI, Mikami A, Sugiura W, Sato T, Yoshida T, Shimada S, Mitsuya H. Correlates of neutralizing/SARS-CoV-2-S1-binding antibody response with adverse effects and immune kinetics in BNT162b2-vaccinated individuals. Sci Rep 2021; 11:22848. [PMID: 34819514 PMCID: PMC8613264 DOI: 10.1038/s41598-021-01930-y] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [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: 08/26/2021] [Accepted: 11/01/2021] [Indexed: 01/08/2023] Open
Abstract
While mRNA vaccines against SARS-CoV-2 are exceedingly effective in preventing symptomatic infection, their immune response features remain to be clarified. In the present prospective study, 225 healthy individuals in Japan, who received two BNT162b2 doses, were enrolled. Correlates of BNT162b2-elicited SARS-CoV-2-neutralizing activity (50% neutralization titer: NT50; assessed using infectious virions) with various determinants were examined and the potency of sera against variants of concerns was determined. Significant rise in NT50s was seen in sera on day 28 post-1st dose. A moderate inverse correlation was seen between NT50s and ages, but no correlation seen between NT50s and adverse effects. NT50s and SARS-CoV-2-S1-binding-IgG levels on day 28 post-1st dose and pain scores following the 2nd dose were greater in women than in men. The average half-life of NT50s was ~ 68 days, and 23.6% (49 out of 208 individuals) failed to show detectable neutralizing activity on day 150. While sera from elite-responders (NT50s > 1,500: the top 4% among the participants) potently to moderately blocked all variants of concerns examined, some sera with low NT50s failed to block the B.1.351-beta strain. Since BNT162b2-elicited immunity against SARS-CoV-2 is short, an additional vaccine or other protective measures are needed.
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Affiliation(s)
- Kenji Maeda
- Department of Refractory Viral Infections, National Center for Global Health and Medicine (NCGM) Research Institute, Tokyo, Japan.
| | - Masayuki Amano
- Department of Clinical Sciences, Kumamoto University Hospital, Kumamoto, Japan
| | | | | | | | | | | | - Asuka Fujiwara
- Department of Refractory Viral Infections, National Center for Global Health and Medicine (NCGM) Research Institute, Tokyo, Japan
| | - Yuki Takamatsu
- Department of Refractory Viral Infections, National Center for Global Health and Medicine (NCGM) Research Institute, Tokyo, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | - Hiroaki Mitsuya
- Department of Refractory Viral Infections, National Center for Global Health and Medicine (NCGM) Research Institute, Tokyo, Japan.
- Department of Clinical Sciences, Kumamoto University Hospital, Kumamoto, Japan.
- Experimental Retrovirology Section, HIV and AIDS Malignancy Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA.
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Maeda K, Amano M, Uemura Y, Tsuchiya K, Matsushima T, Noda K, Shimizu Y, Fujiwara A, Takamatsu Y, Ichikawa Y, Nishimura H, Kinoshita M, Matsumoto S, Gatanaga H, Yoshimura K, Oka SI, Mikami A, Sugiura W, Sato T, Yoshida T, Shimada S, Mitsuya H. Correlates of Neutralizing/SARS-CoV-2-S1-binding Antibody Response with Adverse Effects and Immune Kinetics in BNT162b2-Vaccinated Individuals. medRxiv 2021:2021.07.27.21261237. [PMID: 34373860 PMCID: PMC8351777 DOI: 10.1101/2021.07.27.21261237] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND While mRNA vaccines against SARS-CoV-2 have been exceedingly effective in preventing symptomatic viral infection, the features of immune response remain to be clarified. METHODS In the present prospective observational study, 225 healthy individuals in Kumamoto General Hospital, Japan, who received two BNT162b2 doses in February 2021, were enrolled. Correlates of BNT162b2-elicited SARS-CoV-2-neutralizing activity (50% neutralization titer: NT 50 ; assessed using infectious virions and live target cells) with SARS-CoV-2-S1-binding-IgG and -IgM levels, adverse effects (AEs), ages, and genders were examined. The average half-life of neutralizing activity and the average time length for the loss of detectable neutralizing activity were determined and the potency of serums against variants of concerns was also determined. FINDINGS Significant rise in NT 50 s was seen in serums on day 28 post-1st dose. A moderate inverse correlation was seen between NT 50 s and ages, but no correlation was seen between NT 50 s and AEs. NT 50 s and IgG levels on day 28 post-1st dose and pain scores following the 2nd shot were greater in women than in men. The average half-life of neutralizing activity in the vaccinees was approximately 67.8 days and the average time length for their serums to lose the detectable neutralizing activity was 198.3 days. While serums from elite-responders (NT 50 s>1,500-fold: the top 4% among all participants' NT 50 s) potently to moderately blocked the infectivity of variants of concerns, some serums with moderate NT 50 s failed to block the infectivity of a beta strain. INTERPRETATION BNT162b2-elicited immune response has no significant association with AEs. BNT162b2-efficacy is likely diminished to under detection limit by 6-7 months post-1st shot. High-level neutralizing antibody-containing serums potently to moderately block the infection of SARS-CoV-2 variants; however, a few moderate-level neutralizing antibody-containing serums failed to do so. If BNT162b2-elicited immunity memory is short, an additional vaccine or other protective measures would be needed. RESEARCH IN CONTEXT Evidence before this study: While mRNA vaccines against SARS-CoV-2 have been exceedingly effective in preventing symptomatic viral infection, the salient features of immune response including the persistence of protection remain to be clarified. There is a report that anti-SARS-CoV-2 antibodies persist through 6 months after the second dose of mRNA-1273 vaccine (Doria-Rose et al. N Engl J Med . 2021;384:2259-2261); however, more definite immune kinetics following mRNA-vaccine-elicited protection have to be clarified. The mRNA-vaccine-elicited protection against SARS-CoV-2 variants are also to be determined. Added value of this study: In the present prospective study, 225 twice-BNT162b2-dose-receiving individuals in Japan were enrolled. No significant correlation was seen between 50% neutralizing titers (NT 50 s), determined by using infectious SARS-CoV-2 virions and live target cells, and adverse effects. Largely, NT 50 s and IgG levels were greater in women than in men. Following 28 days post-2 nd shot, significant reduction was seen in NT 50 s, IgG, and IgM levels. The average half-life of NT 50 s was ∼68 days and the average time-length for participants' serums to lose the detectable activity was ∼198 days. Although serums from elite-responders potently to moderately blocked the infectivity of variants of concerns, some serums with moderate NT 50 s failed to block the infectivity of a beta strain. Implications of all the available evidence: BNT162b2 efficacy is likely to be diminished to under detection limit by 6-7 months post-1 st shot on average. Individuals with moderate NT 50 s may fail to block beta variants. If BNT162b2-elicited immune memory is lost soon, additional vaccine(s) or other protective means would be needed.
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Affiliation(s)
- Kenji Maeda
- Department of Refractory Viral Infections, National Center for Global Health and Medicine (NCGM) Research Institute, Tokyo, Japan
| | - Masayuki Amano
- Department of Clinical Sciences, Kumamoto University Hospital, Kumamoto, Japan
| | | | | | | | | | | | - Asuka Fujiwara
- Department of Refractory Viral Infections, National Center for Global Health and Medicine (NCGM) Research Institute, Tokyo, Japan
| | - Yuki Takamatsu
- Department of Refractory Viral Infections, National Center for Global Health and Medicine (NCGM) Research Institute, Tokyo, Japan
| | | | | | | | | | | | | | | | - Ayako Mikami
- Department of Clinical Sciences, NCGM, Tokyo, Japan
| | | | | | | | | | - Hiroaki Mitsuya
- Department of Refractory Viral Infections, National Center for Global Health and Medicine (NCGM) Research Institute, Tokyo, Japan
- Department of Clinical Sciences, Kumamoto University Hospital, Kumamoto, Japan
- Experimental Retrovirology Section, HIV and AIDS Malignancy Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
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Kogawa C, Fujiwara A, Sekiguchi R, Shoji T, Kawakami J, Okazaki M, Ito S. Synthesis and photophysical properties of azuleno[1′,2′:4,5]pyrrolo[2,1-b]quinazoline-6,14-diones: Azulene analogs of tryptanthrin. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.10.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Miyoshi T, Umekawa T, Hosoda H, Asada T, Fujiwara A, Kurosaki KI, Shiraishi I, Nakai M, Nishimura K, Miyazato M, Kangawa K, Ikeda T, Yoshimatsu J, Minamino N. Plasma natriuretic peptide levels in fetuses with congenital heart defect and/or arrhythmia. Ultrasound Obstet Gynecol 2018; 52:609-616. [PMID: 29024133 DOI: 10.1002/uog.18925] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Revised: 08/19/2017] [Accepted: 09/29/2017] [Indexed: 06/07/2023]
Abstract
OBJECTIVE Diagnosing fetal heart failure remains challenging because it is difficult to know how well the fetal myocardium will perform as loading conditions change. In adult cardiology, natriuretic peptides (NPs) are established markers of heart failure. However, the number of studies investigating NP levels in fetuses is quite limited. The aim of this study was to evaluate the significance of plasma NP levels in the assessment of heart failure in fetuses with a congenital heart defect (CHD) and/or arrhythmia. METHODS This was a prospective observational study conducted at a tertiary pediatric cardiac center. A total of 129 singletons with CHD and/or arrhythmia and 127 controls were analyzed between 2012 and 2015. Umbilical cord plasma atrial NP, brain NP and N-terminal pro-brain NP levels at birth were compared with ultrasonography findings indicating fetal heart failure, such as cardiovascular profile (CVP) score and morphological characteristics. RESULTS Fetuses with CHD and/or arrhythmia had higher NP levels than did controls (P < 0.01). NP levels of fetuses with CHD and/or arrhythmia were correlated inversely with CVP score (P for trend < 0.01). No differences in NP levels were found in fetuses with CHD and/or arrhythmia and a CVP score of ≥ 8 in comparison to controls. Multivariate analysis showed that a CVP score of ≤ 5, tachy- or bradyarrhythmia at birth, preterm birth and umbilical artery pH < 7.15 were associated independently with high NP levels (P < 0.01). Among fetuses with a CVP score of ≤ 7, abnormal venous Doppler sonography findings were significantly more common and more severe in fetuses with tachy- or bradyarrhythmia than in those with CHD, and those with tachy- or bradyarrhythmia had higher NP levels than did those with CHD (P = 0.01). Fetuses with right-heart defect and moderate or severe tricuspid valve regurgitation had significantly higher NP levels than did fetuses with other types of CHD (P < 0.01). CONCLUSIONS Plasma NP levels in fetuses with CHD and/or arrhythmia are correlated with the severity of fetal heart failure. Elevated NP levels are attributed mainly to an increase in central venous pressure secondary to arrhythmia or atrioventricular valve regurgitation due to CHD, rather than to the morphological abnormality itself. Copyright © 2017 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- T Miyoshi
- Department of Perinatology and Gynecology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - T Umekawa
- Department of Obstetrics and Gynecology, Mie University, Tsu, Japan
| | - H Hosoda
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Suita, Japan
| | - T Asada
- Laboratory of Clinical Chemistry, National Cerebral and Cardiovascular Center, Suita, Japan
| | - A Fujiwara
- Laboratory of Clinical Chemistry, National Cerebral and Cardiovascular Center, Suita, Japan
| | - K I Kurosaki
- Department of Pediatric Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - I Shiraishi
- Department of Pediatric Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - M Nakai
- Department of Statistics and Data Analysis, Center for Cerebral and Cardiovascular Disease Information, National Cerebral and Cardiovascular Center, Suita, Japan
| | - K Nishimura
- Department of Statistics and Data Analysis, Center for Cerebral and Cardiovascular Disease Information, National Cerebral and Cardiovascular Center, Suita, Japan
| | - M Miyazato
- Department of Biochemistry, National Cerebral and Cardiovascular Center, Suita, Japan
| | - K Kangawa
- Department of Biochemistry, National Cerebral and Cardiovascular Center, Suita, Japan
| | - T Ikeda
- Department of Obstetrics and Gynecology, Mie University, Tsu, Japan
| | - J Yoshimatsu
- Department of Perinatology and Gynecology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - N Minamino
- Omics Research Center, National Cerebral and Cardiovascular Center, Suita, Japan
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Sivakumarasamy R, Hartkamp R, Siboulet B, Dufrêche JF, Nishiguchi K, Fujiwara A, Clément N. Selective layer-free blood serum ionogram based on ion-specific interactions with a nanotransistor. Nat Mater 2018; 17:464-470. [PMID: 29403057 DOI: 10.1038/s41563-017-0016-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2016] [Accepted: 12/22/2017] [Indexed: 06/07/2023]
Abstract
Despite being ubiquitous in the fields of chemistry and biology, the ion-specific effects of electrolytes pose major challenges for researchers. A lack of understanding about ion-specific surface interactions has hampered the development and application of materials for (bio-)chemical sensor applications. Here, we show that scaling a silicon nanotransistor sensor down to ~25 nm provides a unique opportunity to understand and exploit ion-specific surface interactions, yielding a surface that is highly sensitive to cations and inert to pH. The unprecedented sensitivity of these devices to Na+ and divalent ions can be attributed to an overscreening effect via molecular dynamics. The surface potential of multi-ion solutions is well described by the sum of the electrochemical potentials of each cation, enabling selective measurements of a target ion concentration without requiring a selective organic layer. We use these features to construct a blood serum ionogram for Na+, K+, Ca2+ and Mg2+, in an important step towards the development of a versatile, durable and mobile chemical or blood diagnostic tool.
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Affiliation(s)
- R Sivakumarasamy
- Institute of Electronics, Microelectronics, and Nanotechnology, CNRS, University of Lille, Villeneuve d'Ascq, France
| | - R Hartkamp
- Process and Energy Department, Delft University of Technology, Delft, the Netherlands
| | - B Siboulet
- Institut de Chimie Separative de Marcoule ICSM, ICSM, CEA, CNRS, ENSCM, Montpellier University, Marcoule, Bagnols-sur-Ceze, France
| | - J-F Dufrêche
- Institut de Chimie Separative de Marcoule ICSM, ICSM, CEA, CNRS, ENSCM, Montpellier University, Marcoule, Bagnols-sur-Ceze, France
| | - K Nishiguchi
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Japan
| | - A Fujiwara
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Japan
| | - N Clément
- Institute of Electronics, Microelectronics, and Nanotechnology, CNRS, University of Lille, Villeneuve d'Ascq, France.
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Japan.
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11
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Fujiwara A, Shintani Y, Funaki S, Kawamura T, Kanzaki R, Fukui E, Minami M, Okumura M. P1.02-068 Effects of Pirfenidone Targeting EMT and Tumor-Stroma Interaction as Novel Treatment for Non-Small Cell Lung Cancer. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.801] [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: 11/17/2022]
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12
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Shimada M, Imano H, Fujiwara A, Hashimoto T, Kato R, Ijiri Y, Izumi Y, Yoshiyama M, Hayashi T. P5147Direct factor Xa inhibition prevents cardiac remodeling induced by intermittent hypoxia through PAR-1/2 dual signaling pathway. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p5147] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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13
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Abstract
1. The E3 ubiquitin protein ligase 1 (WWP1) gene, the mutation of which causes muscular dystrophy in chickens, is expressed not only in the pectoral muscle, but also in a number of tissues such as the kidney. Therefore, this study examined some parameters related to kidney function in muscular dystrophic (MD) chickens. 2. Plasma osmolality, Na+ and K+ concentrations, aldosterone levels, and the expression of aquaporin (AQP) 2, AQP3, and α subunits of the amiloride-sensitive epithelial sodium channel (αENaC) were analysed in the kidneys of 5-week-old MD chickens and White Leghorn (WL) chickens under physiological conditions or after one day of water deprivation. 3. Plasma osmolality, Na+ concentrations, and plasma aldosterone levels were significantly higher in MD chickens than in WL chickens. αENaC mRNA expression levels were lower in MD chickens than in WL chickens. AQP2 and AQP3 mRNA expression levels were similar in the two strains of chickens. 4. Plasma osmolality correlated with aldosterone levels and AQP2 and αENaC mRNA levels in WL chickens. In MD chickens, plasma osmolality correlated with AQP2 mRNA levels, but not with plasma aldosterone or αENaC mRNA levels. 5. These results suggest that neither water reabsorption nor the expression of AQP2 and AQP3 is impaired in MD chickens and that a WWP1 gene mutation may or may not directly induce an abnormality in Na+-reabsorption in the kidneys of MD chickens, potentially through αENaC.
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Affiliation(s)
- N Saito
- a Laboratory of Animal Physiology, Graduate School of Bioagricultural Sciences , Nagoya University , Nagoya , Japan.,b Avian Bioresource Research Center, Graduate School of Bioagricultural Sciences , Nagoya University , Nagoya , Japan
| | - H Hirayama
- a Laboratory of Animal Physiology, Graduate School of Bioagricultural Sciences , Nagoya University , Nagoya , Japan
| | - K Yoshimura
- a Laboratory of Animal Physiology, Graduate School of Bioagricultural Sciences , Nagoya University , Nagoya , Japan
| | - Y Atsumi
- b Avian Bioresource Research Center, Graduate School of Bioagricultural Sciences , Nagoya University , Nagoya , Japan
| | - M Mizutani
- b Avian Bioresource Research Center, Graduate School of Bioagricultural Sciences , Nagoya University , Nagoya , Japan
| | - K Kinoshita
- b Avian Bioresource Research Center, Graduate School of Bioagricultural Sciences , Nagoya University , Nagoya , Japan
| | - A Fujiwara
- c Laboratory Animal Research Station , Nippon Institute for Biological Science , Hokuto , Japan
| | - T Namikawa
- b Avian Bioresource Research Center, Graduate School of Bioagricultural Sciences , Nagoya University , Nagoya , Japan
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14
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Trasobares J, Rech J, Jonckheere T, Martin T, Aleveque O, Levillain E, Diez-Cabanes V, Olivier Y, Cornil J, Nys JP, Sivakumarasamy R, Smaali K, Leclere P, Fujiwara A, Théron D, Vuillaume D, Clément N. Estimation of π-π Electronic Couplings from Current Measurements. Nano Lett 2017; 17:3215-3224. [PMID: 28358215 DOI: 10.1021/acs.nanolett.7b00804] [Citation(s) in RCA: 14] [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] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The π-π interactions between organic molecules are among the most important parameters for optimizing the transport and optical properties of organic transistors, light-emitting diodes, and (bio-) molecular devices. Despite substantial theoretical progress, direct experimental measurement of the π-π electronic coupling energy parameter t has remained an old challenge due to molecular structural variability and the large number of parameters that affect the charge transport. Here, we propose a study of π-π interactions from electrochemical and current measurements on a large array of ferrocene-thiolated gold nanocrystals. We confirm the theoretical prediction that t can be assessed from a statistical analysis of current histograms. The extracted value of t ≈35 meV is in the expected range based on our density functional theory analysis. Furthermore, the t distribution is not necessarily Gaussian and could be used as an ultrasensitive technique to assess intermolecular distance fluctuation at the subangström level. The present work establishes a direct bridge between quantum chemistry, electrochemistry, organic electronics, and mesoscopic physics, all of which were used to discuss results and perspectives in a quantitative manner.
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Affiliation(s)
- J Trasobares
- Institute of Electronics, Microelectronics and Nanotechnology, CNRS, University of Lille , Avenue Poincaré, BP60069, 59652, Villeneuve d'Ascq France
| | - J Rech
- Aix Marseille University, Universite de Toulon, CNRS, CPT , 163 Avenue de Luminy, 13288 Marseille cedex 9, France
| | - T Jonckheere
- Aix Marseille University, Universite de Toulon, CNRS, CPT , 163 Avenue de Luminy, 13288 Marseille cedex 9, France
| | - T Martin
- Aix Marseille University, Universite de Toulon, CNRS, CPT , 163 Avenue de Luminy, 13288 Marseille cedex 9, France
| | - O Aleveque
- Université d'Angers, CNRS UMR 6200, Laboratoire MOLTECH-Anjou , 2 bd Lavoisier, 49045 Angers cedex, France
| | - E Levillain
- Université d'Angers, CNRS UMR 6200, Laboratoire MOLTECH-Anjou , 2 bd Lavoisier, 49045 Angers cedex, France
| | - V Diez-Cabanes
- Laboratory for Chemistry of Novel Materials, University of Mons , Place du Parc 20, B-7000 Mons, Belgium
| | - Y Olivier
- Laboratory for Chemistry of Novel Materials, University of Mons , Place du Parc 20, B-7000 Mons, Belgium
| | - J Cornil
- Laboratory for Chemistry of Novel Materials, University of Mons , Place du Parc 20, B-7000 Mons, Belgium
| | - J P Nys
- Institute of Electronics, Microelectronics and Nanotechnology, CNRS, University of Lille , Avenue Poincaré, BP60069, 59652, Villeneuve d'Ascq France
| | - R Sivakumarasamy
- Institute of Electronics, Microelectronics and Nanotechnology, CNRS, University of Lille , Avenue Poincaré, BP60069, 59652, Villeneuve d'Ascq France
| | - K Smaali
- Institute of Electronics, Microelectronics and Nanotechnology, CNRS, University of Lille , Avenue Poincaré, BP60069, 59652, Villeneuve d'Ascq France
| | - P Leclere
- Laboratory for Chemistry of Novel Materials, University of Mons , Place du Parc 20, B-7000 Mons, Belgium
| | - A Fujiwara
- NTT Basic Research Laboratories, 3-1, Morinosato Wakamiya, Atsugi-shi, kanagawa 243-0198, Japan
| | - D Théron
- Institute of Electronics, Microelectronics and Nanotechnology, CNRS, University of Lille , Avenue Poincaré, BP60069, 59652, Villeneuve d'Ascq France
| | - D Vuillaume
- Institute of Electronics, Microelectronics and Nanotechnology, CNRS, University of Lille , Avenue Poincaré, BP60069, 59652, Villeneuve d'Ascq France
| | - N Clément
- Institute of Electronics, Microelectronics and Nanotechnology, CNRS, University of Lille , Avenue Poincaré, BP60069, 59652, Villeneuve d'Ascq France
- NTT Basic Research Laboratories, 3-1, Morinosato Wakamiya, Atsugi-shi, kanagawa 243-0198, Japan
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15
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Fujiwara A, Tokura K, Tome W, Kitai N. Multidirectional lip-closing force in adult females after short-term lip training. J Oral Rehabil 2016; 43:833-839. [DOI: 10.1111/joor.12430] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/15/2016] [Indexed: 11/30/2022]
Affiliation(s)
- A. Fujiwara
- Department of Orthodontics; School of Dentistry; Asahi University; Hozumi Gifu Japan
| | - K. Tokura
- Department of Orthodontics; School of Dentistry; Asahi University; Hozumi Gifu Japan
| | - W. Tome
- Department of Orthodontics; School of Dentistry; Asahi University; Hozumi Gifu Japan
| | - N. Kitai
- Department of Orthodontics; School of Dentistry; Asahi University; Hozumi Gifu Japan
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16
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Fujiwara A, Komasawa N, Kido H, Kusaka Y, Minami T. Abstract PR538. Anesth Analg 2016. [DOI: 10.1213/01.ane.0000492921.03184.c0] [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: 11/05/2022]
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17
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Yasuda G, Fujiwara A, Saka S, Hirawa N. SUN-P239: Effects of L-HISTIDINE Supplement on Treatment of Renal Anemia using Erythropoiesis-Stimulating Agents in Patients with Advanced Chronic Kidney Disease. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30582-9] [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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18
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Fujiwara A, Komasawa N, Kido H, Kusaka Y, Minami T. Comparison of high and low pillow heights for tracheal tube intubation with the Pentax-AWS Airwayscope ® : a prospective randomized clinical trial. Br J Anaesth 2016; 117:132-3. [DOI: 10.1093/bja/aew158] [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: 11/14/2022] Open
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19
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Ito K, Saiki H, Sakaguchi T, Hayashi K, Nishii Y, Watanabe F, Hataji O, Okano T, Naito M, Ibata H, Fujiwara A, Yoshida M, Itani H, Tanigawa M, Kobayashi H. 457P Background of patients (pts) with ALK rearranged (ALK+) non-small-cell lung cancer (NSCLC), and efficacy and safety of ALK inhibitors (ALK-Is) in actual clinical practice: Multicenter retrospective study. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv532.41] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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20
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Renard VT, Piot BA, Waintal X, Fleury G, Cooper D, Niida Y, Tregurtha D, Fujiwara A, Hirayama Y, Takashina K. Valley polarization assisted spin polarization in two dimensions. Nat Commun 2015; 6:7230. [PMID: 26027889 PMCID: PMC4458877 DOI: 10.1038/ncomms8230] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [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: 07/15/2014] [Accepted: 04/20/2015] [Indexed: 11/15/2022] Open
Abstract
Valleytronics is rapidly emerging as an exciting area of basic and applied research. In two-dimensional systems, valley polarization can dramatically modify physical properties through electron-electron interactions as demonstrated by such phenomena as the fractional quantum Hall effect and the metal-insulator transition. Here, we address the electrons' spin alignment in a magnetic field in silicon-on-insulator quantum wells under valley polarization. In stark contrast to expectations from a non-interacting model, we show experimentally that less magnetic field can be required to fully spin polarize a valley-polarized system than a valley-degenerate one. Furthermore, we show that these observations are quantitatively described by parameter-free ab initio quantum Monte Carlo simulations. We interpret the results as a manifestation of the greater stability of the spin- and valley-degenerate system against ferromagnetic instability and Wigner crystalization, which in turn suggests the existence of a new strongly correlated electron liquid at low electron densities.
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Affiliation(s)
- V. T. Renard
- Université Grenoble Alpes/CEA, INAC-SPSMS, F-38000, Grenoble, France
| | - B. A. Piot
- Laboratoire National des Champs Magnétiques Intenses, CNRS-UJF-UPS-INSA-EMFL, 38042, Grenoble, France
| | - X. Waintal
- Université Grenoble Alpes/CEA, INAC-SPSMS, F-38000, Grenoble, France
| | - G. Fleury
- Service de Physique de l'État Condensé, DSM/IRAMIS/SPEC, CNRS UMR 3680 CEA Saclay, 91191 Gif sur Yvette, France
| | - D. Cooper
- Université Grenoble Alpes/CEA Leti Minatec campus, F-38054, Grenoble, France
| | - Y. Niida
- Graduate School of Science, Tohoku University, 6-3 Aramakiaza Aoba, Aobaku, Sendai, 980-8578, Japan
| | - D. Tregurtha
- Department of Physics, University of Bath, Bath, BA2 7AY, UK
| | - A. Fujiwara
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa, 243-0198, Japan
| | - Y. Hirayama
- Graduate School of Science, Tohoku University, 6-3 Aramakiaza Aoba, Aobaku, Sendai, 980-8578, Japan
| | - K. Takashina
- Department of Physics, University of Bath, Bath, BA2 7AY, UK
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21
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Mahboob I, Perrissin N, Nishiguchi K, Hatanaka D, Okazaki Y, Fujiwara A, Yamaguchi H. Dispersive and dissipative coupling in a micromechanical resonator embedded with a nanomechanical resonator. Nano Lett 2015; 15:2312-2317. [PMID: 25751406 DOI: 10.1021/nl5044264] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A micromechanical resonator embedded with a nanomechanical resonator is developed whose dynamics can be captured by the coupled-Van der Pol-Duffing equations. Activating the nanomechanical resonator can dispersively shift the micromechanical resonance by more than 100 times its bandwidth and concurrently increase its energy dissipation rate to the point where it can even be deactivated. The coupled-Van der Pol-Duffing equations also suggest the possibility of self-oscillations. In the limit of strong excitation for the nanomechanical resonator, the dissipation in the micromechanical resonator can not only be reduced, resulting in a quality factor of >3× 10(6), it can even be eliminated entirely resulting in the micromechanical resonator spontaneously vibrating.
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Affiliation(s)
- I Mahboob
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
| | - N Perrissin
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
| | - K Nishiguchi
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
| | - D Hatanaka
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
| | - Y Okazaki
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
| | - A Fujiwara
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
| | - H Yamaguchi
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
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22
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Tadano R, Nunome M, Mizutani M, Kawahara-Miki R, Fujiwara A, Takahashi S, Kawashima T, Nirasawa K, Ono T, Kono T, Matsuda Y. Cost-effective development of highly polymorphic microsatellite in Japanese quail facilitated by next-generation sequencing. Anim Genet 2014; 45:881-4. [PMID: 25287074 DOI: 10.1111/age.12227] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2014] [Indexed: 11/29/2022]
Abstract
Next-generation sequencing technologies permit rapid and cost-effective identification of numerous putative microsatellite loci. Here, from the genome sequences of Japanese quail, we developed microsatellite markers containing dinucleotide repeats and employed these for characterisation of genetic diversity and population structure. A total of 385 individuals from 12 experimental and one wild-derived Japanese quail lines were genotyped with newly developed autosomal markers. The maximum number of alleles, expected heterozygosity and polymorphic information content (PIC) per locus were 10, 0.80 and 0.77 respectively. Approximately half of the markers were highly informative (PIC ≥ 0.50). The mean number of alleles per locus and observed heterozygosity within a line were in the range of 1.3-4.1 and 0.11-0.53 respectively. Compared with the wild-derived line, genetic diversity levels were low in the experimental lines. Genetic differentiation (FST ) between all pairs of the lines ranged from 0.13 to 0.83. Genetic clustering analyses based on multilocus genotypes of individuals showed that most individuals formed clearly defined clusters corresponding to the origins of the lines. These results suggest that Japanese quail experimental lines are highly structured. Microsatellite markers developed in this study may be effective for future genetic studies of Japanese quail.
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Affiliation(s)
- R Tadano
- Faculty of Applied Biological Sciences, Gifu University, Gifu, 501-1193, Japan
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23
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Mahboob I, Mounaix M, Nishiguchi K, Fujiwara A, Yamaguchi H. A multimode electromechanical parametric resonator array. Sci Rep 2014; 4:4448. [PMID: 24658349 PMCID: PMC3963032 DOI: 10.1038/srep04448] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [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: 01/23/2014] [Accepted: 03/07/2014] [Indexed: 11/09/2022] Open
Abstract
Electromechanical resonators have emerged as a versatile platform in which detectors with unprecedented sensitivities and quantum mechanics in a macroscopic context can be developed. These schemes invariably utilise a single resonator but increasingly the concept of an array of electromechanical resonators is promising a wealth of new possibilities. In spite of this, experimental realisations of such arrays have remained scarce due to the formidable challenges involved in their fabrication. In a variation to this approach, we identify 75 harmonic vibration modes in a single electromechanical resonator of which 7 can also be parametrically excited. The parametrically resonating modes exhibit vibrations with only 2 oscillation phases which are used to build a binary information array. We exploit this array to execute a mechanical byte memory, a shift-register and a controlled-NOT gate thus vividly illustrating the availability and functionality of an electromechanical resonator array by simply utilising higher order vibration modes.
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Affiliation(s)
- I. Mahboob
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
| | - M. Mounaix
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
| | - K. Nishiguchi
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
| | - A. Fujiwara
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
| | - H. Yamaguchi
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
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24
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Clément N, Nishiguchi K, Dufreche JF, Guerin D, Fujiwara A, Vuillaume D. Water electrolysis and energy harvesting with zero-dimensional ion-sensitive field-effect transistors. Nano Lett 2013; 13:3903-3908. [PMID: 23879333 DOI: 10.1021/nl4019879] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The relationship of the gas bubble size to the size distribution critically influences the effectiveness of electrochemical processes. Several optical and acoustical techniques have been used to characterize the size and emission frequency of bubbles. Here, we used zero-dimensional (0D) ion-sensitive field-effect transistors (ISFETs) buried under a microbath to detect the emission of individual bubbles electrically and to generate statistics on the bubble emission time. The bubble size was evaluated via a simple model of the electrolytic current. We suggest that energy lost during water electrolysis could be used to generate electric pulses at an optimal efficiency with an array of 0D ISFETs.
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Affiliation(s)
- N Clément
- Institute of Electronics, Microelectronics and Nanotechnology, CNRS, Villeneuve d'Ascq, France.
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25
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Renard VT, Duchemin I, Niida Y, Fujiwara A, Hirayama Y, Takashina K. Metallic behaviour in SOI quantum wells with strong intervalley scattering. Sci Rep 2013; 3:2011. [PMID: 23774638 PMCID: PMC3684805 DOI: 10.1038/srep02011] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Accepted: 05/31/2013] [Indexed: 11/09/2022] Open
Abstract
The fundamental properties of valleys are recently attracting growing attention due to electrons in new and topical materials possessing this degree-of-freedom and recent proposals for valleytronics devices. In silicon MOSFETs, the interest has a longer history since the valley degree of freedom had been identified as a key parameter in the observation of the controversial "metallic behaviour" in two dimensions. However, while it has been recently demonstrated that lifting valley degeneracy can destroy the metallic behaviour, little is known about the role of intervalley scattering. Here, we show that the metallic behaviour can be observed in the presence of strong intervalley scattering in silicon on insulator (SOI) quantum wells. Analysis of the conductivity in terms of quantum corrections reveals that interactions are much stronger in SOI than in conventional MOSFETs, leading to the metallic behaviour despite the strong intervalley scattering.
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Affiliation(s)
- V T Renard
- SPSMS, UMR-E 9001, CEA-INAC/UJF-Grenoble 1, INAC, Grenoble, France.
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26
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Clotet S, Soler MJ, Rebull M, Pascual J, Riera M, Kucher AG, Parastaeva MM, Beresneva ON, Ivanova GT, Zaraysky MI, Artemeva AV, Kaukov IG, Smirnov AV, Roszkowska-Chojecka M, Walkowska A, Gawrys O, Olszynski K, Kompanowska-Jezierska E, Walkowska A, Roszkowska-Chojecka M, Gawrys O, Baranowska I, Kompanowska-Jezierska EM, Roszkowska-Chojecka MM, Dobrowolski L, Badzynska B, Olszynski KH, Lipkowski AW, Sadowski J, Kobayashi Y, Hirawa N, Okuyama Y, Fujita M, Fujiwara A, Saka S, Yatsu K, Toya Y, Yasuda G, Umemura S, Oliveira-Sales EB, Maquigussa E, Semedo P, Pereira LG, Camara NOS, Bergamaschi CT, Campos RR, Boim MA, Potenza MA, Sirolli V, Addabbo F, Di Pietro N, Amoroso L, Pipino C, Pandolfi A, Montagnani M, Bonomini M, Quiroz YJ, Rivero M, Yaguas K, Moran L, Rodriguez-Iturbe B, Lee J, Heo NJ, Kim S, Joo KW, Han JS, Rapp W, Raab S, Sprecher U, Funk J, Apfel CM, Conde-Knape K, Qin Y, Mou L, Li X, Li X, Ilatovskaya ME, Andreev-Andrievsky AA, Pozdnev VF, Iliyn AV, Medvedeva NA, Malyszko J, Koc-Zorawska E, Zbroch E, Malyszko JS, Zorawski M, Mysliwiec M, Wakui H, Tamura K, Masuda SI, Tsurumi-Ikeya Y, Fujita M, Kanaoka T, Fujikawa T, Suzuki S, Kobayashi Y, Yabana M, Toya Y, Umemura S, Iimuro S, Imai E, Matsuo S, Watanabe T, Nitta K, Akizawa T, Makino H, Ohashi Y, Hishida A. Hypertension - experimental models. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft128] [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: 11/12/2022] Open
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Tsuji T, Uruga T, Nitta K, Kawamura N, Mizumaki M, Suzuki M, Sekizawa O, Ishiguro N, Tada M, Ohashi H, Yamazaki H, Yumoto H, Koyama T, Senba Y, Takeuchi T, Terada Y, Nariyama N, Takeshita K, Fujiwara A, Goto S, Yamamoto M, Takata M, Ishikawa T. Development of Fast Scanning Microscopic XAFS Measurement System. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/430/1/012019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Fujiwara A, Kobayashi T, Kazato Y, Yayoshi N, Fujita M. Efficacy of hypofractionated radiotherapy for nasal tumours in 38 dogs (2005-2008). J Small Anim Pract 2013; 54:80-6. [PMID: 23373834 DOI: 10.1111/jsap.12024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To evaluate the efficacy of hypofractionated radiotherapy for canine nasal tumours, including the improvement in clinical signs, rate of complications and assessment of prognostic factors. METHODS Medical records of 38 dogs with malignant nasal tumours were reviewed, and those treated with a weekly schedule of hypofractionated radiotherapy were included in the study. Acute and late side effects were defined as complications noted either within 1 month or after 6 months of irradiation, respectively. Progression-free interval and overall survival were calculated using the Kaplan-Meier method. Log-rank test and Cox proportional hazard model were also performed. RESULTS Clinical signs improved in 30 of 36 dogs. Acute complications were seen in 28 of 36 dogs and were considered manageable. Late complications were observed in 17 of 30 dogs that survived 6 months or longer, but severe side effects were not observed. The median progression-free interval and overall survival was 245 days (95% CI: 127-512 days) and 512 days (95% CI: 203-820 days), respectively. Age, breed and presence of dyspnoea were negatively correlated with overall survival. CLINICAL SIGNIFICANCE These results suggest that hypofractionated radiotherapy could be a viable option for the treatment of nasal tumours in dogs that are not candidates for conventional multi-fractionated radiotherapy.
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Affiliation(s)
- A Fujiwara
- Department of Veterinary Radiology, Nippon Veterinary and Life Science University, Musashino, Tokyo, Japan
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Abstract
An electromechanical resonator harboring an atomlike spectrum of discrete mechanical vibrations, namely, phonon modes, has been developed. A purely mechanical three-mode system becomes available in the electromechanical atom in which the energy difference of the two higher modes is resonant with a long-lived lower mode. Our measurements reveal that even an incoherent input into the higher mode results in coherent emission in the lower mode that exhibits all the hallmarks of phonon lasing in a process that is reminiscent of Brillouin lasing.
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Affiliation(s)
- I Mahboob
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
| | - K Nishiguchi
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
| | - A Fujiwara
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
| | - H Yamaguchi
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
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Sakai K, Okada Y, Kitaoka S, Tsurumi J, Ohishi Y, Fujiwara A, Takimiya K, Takeya J. Anomalous pressure effect in heteroacene organic field-effect transistors. Phys Rev Lett 2013; 110:096603. [PMID: 23496736 DOI: 10.1103/physrevlett.110.096603] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Revised: 12/17/2012] [Indexed: 06/01/2023]
Abstract
Anomalous pressure dependent conductivity is revealed for heteroacene organic field-effect transistors of dinaphtho[2, 3-b:2', 3'-f]thieno[3, 2-b]thiophene single crystals in the direction of a and b crystallographic axes. In contrast to the normal characteristics of a monotonic increase in mobility μ with the application of external hydrostatic pressure P in conductors, we found that the present organic semiconductor devices exhibit nonmonotonic and gigantic pressure dependence including an even negative pressure coefficient dμ/dP. In combination with a structural analysis based on x-ray diffraction experiments under pressure, it is suggested that on-site molecular orientation and displacement peculiar in heteroacene molecules are responsible for the anomalous pressure effect.
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Affiliation(s)
- K Sakai
- ISIR, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
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Yamaguchi K, Tsushima K, Kurita N, Fujiwara A, Soeda S, Yamaguchi A, Sugiyama S, Togashi Y, Kono Y, Kasagi S, Setoguchi Y. Clinical characteristics classified by the serum KL-6 level in patients with organizing pneumonia. Sarcoidosis Vasc Diffuse Lung Dis 2013; 30:43-51. [PMID: 24003534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND The serum Krebs von der Lungen-6 (KL-6) level is a useful marker correlated with the severity of various interstitial lung diseases. There have been few reports about the clinical characteristics of organizing pneumonia (OP) associated with the serum KL-6 levels. OBJECTIVE This study was performed to determine whether the serum KL-6 levels can help determine the optimal treatment for OP. DESIGNS Patients diagnosed with OP by clinical, radiological and histopathological findings were retrospectively reviewed. The OP patients were classified into two groups based on their serum KL-6 levels: normal KL-6 and high KL-6 groups. The two groups were compared with regard to their clinical and radiological data and therapeutic response one month after the start of treatment. RESULTS The clinical records of twenty-two patients diagnosed with OP were reviewed. The serum KL-6 level was elevated in 11 of the 22 patients. There were no obvious differences in the clinical data between the two groups, although patients in the normal KL-6 group tended to have a fever. There were no significant differences in the chest X-ray (CXR) score or computed tomography (CT) score between the two groups. The CXR scores were correlated with the serum KL-6 levels. At 1 month after the diagnosis, 11 patients who needed treatment with prednisolone were included in the high KL-6 group. CONCLUSIONS Patients with normal KL-6 levels showed lower CXR and CT scores. The serum KL-6 level on admission is a useful marker to judge the need for corticosteroid treatment in OP patients.
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Affiliation(s)
- K Yamaguchi
- Department of Pulmonary Medicine, Tokyo Medical University,Tokyo, Japan
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Abstract
We report on single electron pumping via a tunable number of individual donors. We use a device that essentially consists of a silicon nanowire with local arsenic implantation between a set of fine gates. A temperature-dependent characterization of the pumped current allows us to extract the ionization energy of a single arsenic donor. We observe the ionization energy to be tunable by the gate electric field over a large range of energies.
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Affiliation(s)
- G P Lansbergen
- NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa, 243-0198, Japan.
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Tokunaga T, Higashiyama M, Okami J, Maeda J, Fujiwara A, Kodama K. ERRATUM for a missing eComment to 'Intrathoracic chemo-thermotherapy with radiofrequency waves after extrapleural pneumonectomy for malignant pleural mesothelioma': [Interact CardioVasc Thorac Surg 2011;13:267-270]. Interact Cardiovasc Thorac Surg 2011. [DOI: 10.1510/icvts.2011.270561a] [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: 11/06/2022] Open
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Takashina K, Niida Y, Renard VT, Fujiwara A, Fujisawa T, Muraki K, Hirayama Y. Impact of valley polarization on the resistivity in two dimensions. Phys Rev Lett 2011; 106:196403. [PMID: 21668179 DOI: 10.1103/physrevlett.106.196403] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Indexed: 05/30/2023]
Abstract
We examine the temperature dependence of resistivity in a two-dimensional electron system formed in a silicon-on-insulator quantum well. The device allows us to tune the valley splitting continuously in addition to the electron density. Our data provide a global picture of how the resistivity and its temperature dependence change with valley polarization. At the boundary between valley-polarized and partially polarized regions, we demonstrate that there is an insulating contribution from spin-degenerate electrons occupying the upper valley-subband edge.
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Affiliation(s)
- K Takashina
- Department of Physics, University of Bath, Bath BA2 7AY, United Kingdom
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Takagi T, Onishi M, Urawa M, Naito M, Fujiwara A, Kobayashi T, Kobayashi H, Toda M, Boveda D, Gil-Bernabe P. Protective Effect of Thrombomodulin in a Murine Model of Allergen-Induced Asthma. J Allergy Clin Immunol 2011. [DOI: 10.1016/j.jaci.2010.12.266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Kaedei Y, Fujiwara A, Tanihara F, Namula Z, Vien VL, Otoi T. 39 IN VITRO DEVELOPMENT OF CANINE EMBRYOS PRODUCED BY INTERSPECIES SOMATIC CELL NUCLEAR TRANSFER USING ENUCLEATED BOVINE OOCYTES. Reprod Fertil Dev 2011. [DOI: 10.1071/rdv23n1ab39] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Interspecies somatic cell nuclear transfer (iSCNT) is an invaluable tool for studying nucleous-cytoplasm interactions, and may provide an alternative for cloning endangered animals, whose oocytes are difficult to obtain. Using readily available oocytes from domestic/farm animals as recipients for iSCNT would greatly benefit ongoing research on somatic cell reprogramming. However, little information is available concerning the development of canine iSCNT embryos reconstructed with bovine oocyte cytoplasm. In the first experiment, we investigated the influence of donor cell type on the development of canine iSCNT embryos reconstructed with enucleated bovine oocytes. Canine mammary gland tumour (MGT) cells and cumulus cells were used as donor cell. The bovine oocytes matured for 22 h were enucleated by the micromanipulator, and the donor cells were transferred into the perivitelline space adjacent to the plasma membrane of the oocyte. The couples were fused and activated simultaneously with a single DC pulse of 2.3 kV cm–1 for 30 μs, using an electro cell fusion generator. The reconstructed embryos were cultured for 72 h in the mSOF medium supplemented with 0.4% BSA. After 72 h of culture, only cleaved embryos were further co-cultured with bovine cumulus cells in mSOF supplemented with 5% fetal bovine serum (FBS) for an additional 5 days. In the second experiment, we examined the effects of serum type on the development of canine iSCNT embryos. The embryos reconstructed with canine cumulus cells were co-cultured with canine cumulus cells in mSOF supplemented with 5% FBS, and canine oestrous and diestrous serum for 5 days after 72 h of culture with 0.4% BSA. Data were analysed by chi-square analysis with a Yates’ correction. More than 75% of the canine somatic cells successfully were fused with bovine enucleated oocytes following electrofusion, irrespective of the types of the donor cells. There were no significant differences in the cleavage rates of iSCNT embryos between the cumulus cell and MGT cell (66.2% v. 62.6%). Although none of the embryos reconstructed with MGT cells (n = 123) developed to the 16-cell stage, 6% of embryos with cumulus cells (n = 133) reached at least the 16-cell stage. There were no significant differences in the cleavage rates of iSCNT embryos among the types of serum. The iSCNT embryos could not develop to the blastocyst stage, irrespective of the type of donor cell and serum. In conclusion, our results indicate that the bovine oocytes partly supported the remodelling and reprogramming of the canine somatic cell nuclei, but they were unable to support the development to the blastocyst stage of canine iSCNT embryos. Moreover, the development to the late embryonic stage of iSCNT embryos may be influenced by the type of donor cell but not serum.
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Kodama K, Okami J, Maeda J, Tokunaga T, Kanzaki R, Fujiwara A, Higashiyama M. [Complete resection of Pancoast tumor following induction chemoradiotherapy improves survival]. Kyobu Geka 2010; 63:9-15. [PMID: 20077826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
OBJECTIVE Pancoast tumors are some of the most challenging thoracic malignant diseases to treat because of their proximity to vital structures at the thoracic inlet. We retrospectively analyzed 23 patients with pT3-4, N0-3 Pancoast tumors who underwent combined chest wall resection including the 1st rib, and discuss the anatomical considerations, assessment of induction therapy, and surgical approaches for these cancers. METHODS Between 1983 and 2006, 23 patients with Pancoast tumors underwent combined resection of the 1st rib at our institute. Of those, 21 were male and 2 were female, with an average age of 58 years. There were 10 each of squamous cell carcinoma and adenocarcinoma, 2 large cell carcinoma, and 1 adenosquamous carcinoma. Over the past decade, induction chemoradiotherapy (>40Gy) was employed before surgery. RESULTS A posterior approach was employed in 14 patients, an anterior approach in 7, and a combined anterior and posterior approach in 2. Sixteen patients underwent complete resection. One of 7 patients undergoing incomplete resection (4.3%) died on the 45th postoperative day. The 3- and 5-year survival rates were 50 and 22%, respectively, for patients with complete resection. No case survived for more than 8 months out of the 7 patients with incomplete resection. Fourteen patients with pN0 showed significantly better survival than those with pN1-3 (p = 0.0053). CONCLUSION Recent literature and our results suggest that patients with pN0 and/or a pathological complete response (pCR) after induction chemoradiotherapy could achieve long-term survival after complete resection.
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Affiliation(s)
- Ken Kodama
- Department of Thoracic Surgery, Osaka Medical Center for Cancer and Cardiovascular Diseases, Japan
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Takagi T, Taguchi O, Aoki S, Toda M, Yamaguchi A, Fujimoto H, Boveda-Ruiz D, Gil-Bernabe P, Ramirez AY, Naito M, Yano Y, D'Alessandro-Gabazza CN, Fujiwara A, Takei Y, Morser J, Gabazza EC. Direct effects of protein S in ameliorating acute lung injury. J Thromb Haemost 2009; 7:2053-63. [PMID: 19817989 DOI: 10.1111/j.1538-7836.2009.03642.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Protein S may exert an anticoagulant activity by enhancing the anticoagulant activity of activated protein C and/or by directly inhibiting the prothrombinase complex. Protein S itself may also directly regulate inflammatory responses and apoptosis. The role of protein S in acute lung injury (ALI) was unknown. This study evaluated the effect of protein S on ALI in the mouse. METHODS Animal ALI was induced in C57/BL6 mice by intratracheal instillation of lipopolysaccharide (LPS). Mice were treated with protein S or saline by intraperitoneal injection 1 h before LPS instillation. RESULTS Activated protein or protein S alone and combined activated protein C + protein S therapy decreased inflammatory markers and cytokines in mice with acute lung injury. In LPS-treated mice compared with controls ALI was induced as shown by significantly increased levels of total protein, tumor necrosis factor-alpha, interleukin-6 and monocyte chemoattractant protein-1 in the bronchoalveolar lavage fluid. Mice with ALI treated with protein S had significantly decreased concentrations of tumor necrosis factor-alpha and interleukin-6 in the lung compared with untreated animals. Thrombin-antithrombin III, a marker of the activity of the coagulation cascade, was unchanged. Protein S inhibited the expression of cytokines in vitro and increased activation of the Axl tyrosine kinase pathway in A549 epithelial cells. CONCLUSION Protein S protects against LPS-induced ALI, possibly by directly inhibiting the local expression of inflammatory cytokines without affecting coagulation.
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Affiliation(s)
- T Takagi
- Department of Pulmonary and Critical Care Medicine, Mie University Graduate School of Medicine, Tsu City, Mie Prefecture, Japan
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Sasaki T, Kobayashi T, Takagi I, Moriyama H, Fujiwara A, Kulyako YM, Perevalov S, Myasoedov BF. Complex formation and solubility of Pu(IV) with malonic and succinic acids. RADIOCHIM ACTA 2009. [DOI: 10.1524/ract.2009.1594] [Citation(s) in RCA: 3] [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: 11/24/2022]
Abstract
AbstractThe complex formation constants of tetravalent plutonium ion with malonic and succinic acids in aqueous solution were determined by the solvent-extraction method. Also, by taking the known values of the solubility products, the hydrolysis constants and the formation constants, the experimental solubility data of plutonium in the presence of carboxylates were analyzed.
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Affiliation(s)
| | - Taishi Kobayashi
- Kyoto University Yoshida, Sakyo-ku, Department of Nuclear Engineering, Kyoto, Japan
| | - I. Takagi
- Kyoto University Yoshida, Sakyo-ku, Department of Nuclear Engineering,, Kyoto, Japan
| | | | - A. Fujiwara
- Radioactive Waste Management Funding and Research Center, Tokyo, Japan
| | - Yu. M. Kulyako
- Russian Academy of Sciences, V. I. Vernadsky Institute of Geochemistry , Moscow, Russische Föderation
| | - S. Perevalov
- V.I. of Geochemistry and Analytical Chemistry, Moscow, Russische Föderation
| | - Boris F. Myasoedov
- Russian Academy of Sciences, V. I. of Geochemistry and Analytical Chemistry, Moscow, Russische Föderation
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Nishiguchi K, Fujiwara A. Single-electron counting statistics and its circuit application in nanoscale field-effect transistors at room temperature. Nanotechnology 2009; 20:175201. [PMID: 19420585 DOI: 10.1088/0957-4484/20/17/175201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A circuit utilizing single electrons is demonstrated at room temperature. Individual electrons randomly passing through the nanoscale silicon-on-insulator metal-oxide-semiconductor field-effect transistor (MOSFET) are monitored by an electrometer in real time. Such a random behavior of single electrons is used for high-quality random-number generation suitable for data processing which stochastically extracts the most preferable pattern among various ones. MOSFET-based random-number generation allows fast operation as well as high controllability, which leads to flexible extraction of the preferable pattern.
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Affiliation(s)
- K Nishiguchi
- NTT Basic Research Laboratories, NTT Corporation, Atsugi, Kanagawa, Japan.
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Valdez MB, Mizutani M, Kinoshita K, Fujiwara A, Yazawa H, Yamagata T, Shimada K, Namikawa T. 112. DIFFERENTIAL DEVELOPMENT OF SEX-RELATED CHARACTERS OF THE GSP AND PNP/DO CHICKENS AFTER LEFT-OVARIECTOMY. Reprod Fertil Dev 2009. [DOI: 10.1071/srb09abs112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
To elucidate the strain difference in the sex reversal of genetic female to phenotypic male, GSP and PNP/DO females were left ovariectomized (ovx) between one day to three days after hatching and the degree of masculinization based on sex-related characters, histological analysis of the right gonad and hormone assay were assessed at one year of age. The GSP and PNP/DO inbred lines were both derived from the Fayoumi breed and are only differentiated based on red blood cell antigens type carried by each of the inbred line. Comb and wattles were found to be significantly bigger (P < 0.05) in the GSP ovx compared to the PNP/DO ovx, although male plumage pattern were more pronounced in the PNP/DO ovx. Spurs were observed both in the GSP and PNP/DO ovx with no significant difference (P > 0.05) in length to the respective male controls and body weight were not significantly different (P > 0.05) to the female controls. The size of the right gonad were significantly bigger (P < 0.05) in the GSP ovx than the PNP/DO ovx. Positive correlations were found in the sex related characters as well as plasma testosterone level and the right gonad weight both in the GSP and PNP/DO ovx except for the spur length which resulted into a negative correlation in the PNP/DO ovx. Histological analysis revealed that the right gonad of PNP/DO ovx are morphologically developed compared to GSP ovx showing more advance stages of spermatogenesis. It could be inferred that PNP/DO females which exhibit hereditary persistent right oviduct, are more responsive to the masculinizing effect of ovariectomy compared to GSP females, suggesting that genetic background may have a possible contribution on the degree of masculinization and subsequent development of sex related characters.
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Namiki Y, Fujiwara A, Kihara N, Koda S, Hane K, Yasuda T. Factors Affecting Tautomeric Phenomenon of a Novel Potent Immunosuppressant (FK506) on the Design for Injectable Formulation. Drug Dev Ind Pharm 2008. [DOI: 10.3109/03639049509026645] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Kameo Y, Katayama A, Fujiwara A, Haraga T, Nakashima M. Rapid determination of 89Sr and 90Sr in radioactive waste using Sr extraction disk and beta-ray spectrometer. J Radioanal Nucl Chem 2008. [DOI: 10.1007/s10967-006-6905-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Takashina K, Brun M, Ota T, Maude DK, Fujiwara A, Ono Y, Takahashi Y, Hirayama Y. Anomalous resistance ridges along filling factor nu=4i. Phys Rev Lett 2007; 99:036803. [PMID: 17678309 DOI: 10.1103/physrevlett.99.036803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2006] [Indexed: 05/16/2023]
Abstract
We report anomalous structure in the magnetoresistance of SiO(2)/Si(100)/SiO(2) quantum wells. When Landau levels of opposite valleys are driven through coincidence at the Fermi level, the longitudinal resistance displays elevations at filling factors that are integer multiples of 4 (nu=4i) accompanied by suppression on either side of nu=4i. This persists when either the magnetic field or the valley splitting is swept, leading to resistance ridges running along nu=4i. The range of field over which they are observed points to the role of spin degeneracy, which is directly confirmed by their disappearance with the addition of an in-plane magnetic field. The data suggest a new type of many-body effect arising from the combined degeneracy due to the valley and the spin degrees of freedom.
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Affiliation(s)
- K Takashina
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
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Okada H, Makidono C, Takenaka R, Hiraoka S, Fujiwara A, Kato J, Kawahara Y, Kawamoto H, Mizuno M, Shiratori Y. Therapeutic efficacy of leukocytapheresis in a pregnant woman with severe active ulcerative colitis. Digestion 2007; 74:15-8. [PMID: 16940730 DOI: 10.1159/000095478] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Leukocytapheresis has recently been used to induce remission in patients with ulcerative colitis (UC) who fail to respond to corticosteroids. We could not find a report in the literature on leukocytapheresis for UC with gestational exacerbation. We have recently encountered this unique condition and report the details here. A 30-year-old Japanese woman with left-sided severe UC was corticosteroid-dependent and had recurrence of the active disease during tapering of corticosteroid. She declined any dose increase and the use of any immunosuppressive agent because she was in the 13th week of pregnancy. Then, concomitant leukocytapheresis was performed without increasing the corticosteroid dose. Recovery was rapid and dramatic. Mucous and bloody stool decreased after the first session, and she had remission 2 weeks later. She underwent a total of four sessions without complications. After 6 weeks, she was discharged from our hospital and underwent maintenance treatment as an outpatient with mesalazine and corticosteroid tapering. Subsequently, she gave birth to a healthy baby girl by an uncomplicated vaginal delivery while keeping the remitted stage of UC.
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Affiliation(s)
- H Okada
- Department of Gastroenterology, Okayama University Graduate School of Medicine and Dentistry, Okayama, Japan.
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Abstract
In order to develop a comparative map between chicken and quail, we identified orthologous gene markers based on chicken genomic sequences and localized them on the Japanese quail Kobe-NIBS linkage map, which had previously been constructed with amplified fragment length polymorphisms. After sequencing the intronic regions of 168 genes located on chicken chromosomes 1-8, polymorphisms among Kobe-NIBS quail family parents were detected in 51 genes. These orthologous markers were mapped on eight Japanese quail linkage groups (JQG), and they allowed the comparison of JQG to chicken macrochromosomes. The locations of the genes and their orders were quite similar between the two species except within a previously reported inversion on quail chromosome 2. Therefore, we propose that the respective quail linkage groups are macrochromosomes and designated as quail chromosomes CJA 1-8.
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Affiliation(s)
- S Sasazaki
- Graduate School of Science and Technology, Kobe University, Kobe 657-8501, Japan
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Kurihashi A, Tamai K, Saotome K, Takemura M, Fujiwara A, Fujita S. Difference in stretching of sarcomeres between medial gastrocnemius and tibialis anterior by tibial lengthening: an experiment in rabbits. J Orthop Surg (Hong Kong) 2006; 14:147-50. [PMID: 16914778 DOI: 10.1177/230949900601400208] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
PURPOSE To compare the degree of stretching of sarcomeres--in the medial gastrocnemius versus the tibialis anterior--acutely extended by tibial lengthening. METHODS The right lower legs of 6 New Zealand White rabbits were acutely distracted by 6.3 mm using an external fixator, whereas the left lower legs served as controls. Immediately after distraction, the ankle was dorsiflexed at 50 degrees and the knee flexed at 140 degrees, with respect to the posture of resting on the ground. Both legs were immersed in 10% buffered formalin for fixation, and the medial gastrocnemius and tibialis anterior were removed. Length of the 2 sarcomeres was measured by a laser diffraction technique using isolated muscle fibre bundles. RESULTS The mean lengths of sarcomeres in the medial gastrocnemius and tibialis anterior were 3.0 microm and 2.3 microm in the lengthened legs, and 2.4 microm and 2.1 microm in control legs, respectively. The degree of stretching of corresponding sarcomeres was therefore 25% and 10%, this difference being significant (p<0.01). CONCLUSION Sarcomeres of the medial gastrocnemius are more stretchable than those of the tibialis anterior following tibial lengthening.
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Affiliation(s)
- A Kurihashi
- Department of Orthopaedic Surgery, Dokkyo University School of Medicine Mibu, Tochigi, Japan.
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48
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Fujiwara A, Kawaguchi J, Yeomans DK, Abe M, Mukai T, Okada T, Saito J, Yano H, Yoshikawa M, Scheeres DJ, Barnouin-Jha O, Cheng AF, Demura H, Gaskell RW, Hirata N, Ikeda H, Kominato T, Miyamoto H, Nakamura AM, Nakamura R, Sasaki S, Uesugi K. The rubble-pile asteroid Itokawa as observed by Hayabusa. Science 2006; 312:1330-4. [PMID: 16741107 DOI: 10.1126/science.1125841] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
During the interval from September through early December 2005, the Hayabusa spacecraft was in close proximity to near-Earth asteroid 25143 Itokawa, and a variety of data were taken on its shape, mass, and surface topography as well as its mineralogic and elemental abundances. The asteroid's orthogonal axes are 535, 294, and 209 meters, the mass is 3.51 x 10(10) kilograms, and the estimated bulk density is 1.9 +/- 0.13 grams per cubic centimeter. The correspondence between the smooth areas on the surface (Muses Sea and Sagamihara) and the gravitationally low regions suggests mass movement and an effective resurfacing process by impact jolting. Itokawa is considered to be a rubble-pile body because of its low bulk density, high porosity, boulder-rich appearance, and shape. The existence of very large boulders and pillars suggests an early collisional breakup of a preexisting parent asteroid followed by a re-agglomeration into a rubble-pile object.
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Affiliation(s)
- A Fujiwara
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan.
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49
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Takashina K, Ono Y, Fujiwara A, Takahashi Y, Hirayama Y. Valley polarization in Si(100) at zero magnetic field. Phys Rev Lett 2006; 96:236801. [PMID: 16803388 DOI: 10.1103/physrevlett.96.236801] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2005] [Indexed: 05/10/2023]
Abstract
The valley splitting, which lifts the degeneracy of the lowest two valley states in a SiO(2)/Si(100)/SiO(2) quantum well, is examined through transport measurements. We demonstrate that the valley splitting can be observed directly as a step in the conductance defining a boundary between valley-unpolarized and -polarized regions. This persists to well above liquid helium temperature and shows no dependence on magnetic field, indicating that single-particle valley splitting and valley polarization exist in (100) silicon even at zero magnetic field.
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Affiliation(s)
- K Takashina
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan
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50
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Yano H, Kubota T, Miyamoto H, Okada T, Scheeres D, Takagi Y, Yoshida K, Abe M, Abe S, Barnouin-Jha O, Fujiwara A, Hasegawa S, Hashimoto T, Ishiguro M, Kato M, Kawaguchi J, Mukai T, Saito J, Sasaki S, Yoshikawa M. Touchdown of the Hayabusa Spacecraft at the Muses Sea on Itokawa. Science 2006; 312:1350-3. [PMID: 16741113 DOI: 10.1126/science.1126164] [Citation(s) in RCA: 298] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
After global observations of asteroid 25143 Itokawa by the Hayabusa spacecraft, we selected the smooth terrain of the Muses Sea for two touchdowns carried out on 19 and 25 November 2005 UTC for the first asteroid sample collection with an impact sampling mechanism. Here, we report initial findings about geological features, surface condition, regolith grain size, compositional variation, and constraints on the physical properties of this site by using both scientific and housekeeping data during the descent sequence of the first touchdown. Close-up images revealed the first touchdown site as a regolith field densely filled with size-sorted, millimeter- to centimeter-sized grains.
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Affiliation(s)
- Hajime Yano
- Department of Planetary Science, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510 Japan.
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