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Etani T, Morikawa T, Gonda M, Aoki M, Nagai T, Iida K, Taguchi K, Naiki T, Hamamoto S, Okada A, Kawai N, Yasui T. Usefulness of stone culture in endoscopic combined intra-renal surgery. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)00781-9] [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: 02/12/2023]
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2
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Hatano T, Nakamura I, Ohta S, Tomizawa Y, Urata T, Iida K, Ikuta H. Thin film growth of CaAgAs by molecular beam epitaxy. J Phys Condens Matter 2020; 32:435703. [PMID: 32674076 DOI: 10.1088/1361-648x/aba6a7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We have grown thin films of CaAgAs by molecular beam epitaxy, which was theoretically proposed to be a topological insulator. The temperature dependence of resistivity and the carrier concentration at 4 K were similar to the reported results of bulk samples. However, the magnetoresistance exhibited a steep increase at low magnetic fields, a behavior not observed for bulk samples. This steep increase of resistivity is ascribable to the weak antilocalization effect and provides clues to the nature of the topological surface state of CaAgAs.
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Affiliation(s)
- T Hatano
- Department of Materials Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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3
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Shiraishi Y, Kohsaka S, Katsuki T, Harada K, Miyamoto T, Matsushita K, Iida K, Takei M, Fukuda K, Yamamoto T, Nagao K, Takayama M. P2622Use of intravenous vasodilators in patients hospitalized with acute heart failure: insights from Tokyo cardiovascular care unit network database. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Despite recommendations from clinical practice guidelines, there is scant evidence confirming the effects of vasodilators on clinical outcomes in patients with acute heart failure (AHF).
Purpose
We sought to investigate the effects of intravenous vasodilators on clinical outcomes and to identify the potential patient populations that would benefit from its use.
Methods
Data of 26 212 consecutive patients urgently hospitalized for AHF between 2009 and 2015 were extracted from a multicenter data registration system (Tokyo Cardiovascular Care Unit Network Database, including 72 institutions within the Tokyo metropolitan area in Japan). Patients who did not present with typical AHF episodes, including those without pulmonary congestion on physical and/or chest X-ray and serum B-type natriuretic peptide level <500 pg/ml, as well as those who had hypotension and/or hypoperfusion (systolic blood pressure [SBP] <100 mmHg) as dominant presentation, were excluded. Propensity scores were calculated with multiple imputation and 1:1 matching performed between patients with and without vasodilators. The primary endpoint was in-hospital mortality and the secondary endpoints were length of intensive/cardiovascular care unit (ICU/CCU) stay and hospital stay.
Results
Overall, 8 863 patients were included in the present analysis; they were predominantly male (57%) with a median age of 79 (interquartile range: 70–86) years. Compared with the group without vasodilator use, the vasodilator group had higher SBPs and heart rates and higher frequency of assisted ventilation use, but lower frequency of intravenous diuretics use. After propensity score matching, there were no significant differences in in-hospital mortality rates (7.8% vs. 8.9% in patients without vasodilators, p=0.16) or in length of ICU/CCU stay (5.8 days vs. 5.4 days, p=0.44) and hospital stay (22.7 days vs. 23.8 days, p=0.22) between the groups. However, in subgroup analyses, favorable impacts of vasodilator use on in-hospital mortality were observed among patients who had higher SBPs and among those who had no atrial fibrillation upon admission (Figure). In addition, vasodilators were likely to be more effective in AHF patients with SBP increasing; while levels below 140 mmHg of SBP appeared to be associated with an increased risk for mortality among patients treated with vasodilators compared with those without vasodilators.
Figure 1
Conclusions
In patients with AHF, vasodilator use was not universally associated with improved in-hospital outcomes; however, its effect was dependent of individual clinical presentation. Detailed phenotyping might aid tailoring of treatment strategies for patients with AHF.
Acknowledgement/Funding
the Tokyo Metropolitan Government
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Affiliation(s)
| | | | | | | | | | | | - K Iida
- Tokyo CCU Network, Tokyo, Japan
| | - M Takei
- Tokyo CCU Network, Tokyo, Japan
| | | | | | - K Nagao
- Tokyo CCU Network, Tokyo, Japan
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Furuya H, Ikeda K, Iida K, Suzuki K, Furuta S, Tamachi T, Suzuki K, Miura G, Hiraguri M, Hase R, Hikosaka K, Norose K, Nakajima H. Disseminated toxoplasmosis with atypical symptoms which developed with exacerbation of systemic lupus erythematosus. Lupus 2018; 28:133-136. [PMID: 30486727 DOI: 10.1177/0961203318815583] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Toxoplasma is a common parasite worldwide that mainly affects the brain, lungs and eyes. Although toxoplasmic encephalitis is a lethal disease without treatment, past case reports show most patients with systemic lupus erythematosus who developed toxoplasmic encephalitis were misdiagnosed and treated as neuropsychiatric systemic lupus erythematosus, which led to unfavorable outcomes. We herein describe a case of disseminated toxoplasmosis affecting all the above organs with atypical symptoms, which developed with exacerbation of systemic lupus erythematosus. She had initially manifested with retinochoroiditis without vitritis, mild cognitive impairment and an isolated lung mass. These are completely different from the classic symptoms of toxoplasmosis that have been reported in patients with HIV infection and/or those after hematopoietic transplantation. Our case, together with previously reported cases, suggests the manifestation of toxoplasmosis that develops in systemic lupus erythematosus patients can be different from that seen in conventional cases and varies between individual patients. Our case highlights both the difficulty in and the importance of diagnosing toxoplasmosis in patients with systemic lupus erythematosus and provides helpful information to identify this rare, devastating, yet treatable disease.
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Affiliation(s)
- H Furuya
- 1 Department of Allergy and Clinical Immunology, Chiba University Hospital, Chiba, Japan
| | - K Ikeda
- 1 Department of Allergy and Clinical Immunology, Chiba University Hospital, Chiba, Japan
| | - K Iida
- 1 Department of Allergy and Clinical Immunology, Chiba University Hospital, Chiba, Japan
| | - K Suzuki
- 1 Department of Allergy and Clinical Immunology, Chiba University Hospital, Chiba, Japan
| | - S Furuta
- 1 Department of Allergy and Clinical Immunology, Chiba University Hospital, Chiba, Japan
| | - T Tamachi
- 1 Department of Allergy and Clinical Immunology, Chiba University Hospital, Chiba, Japan
| | - K Suzuki
- 1 Department of Allergy and Clinical Immunology, Chiba University Hospital, Chiba, Japan
| | - G Miura
- 2 Department of Ophthalmology and Visual Science, Chiba University, Graduate School of Medicine, Japan
| | - M Hiraguri
- 3 Department of Allergy and Rheumatology, Japanese Red Cross Narita Hospital, Chiba, Japan
| | - R Hase
- 4 Department of Infectious Diseases, Japanese Red Cross Narita Hospital, Chiba, Japan
| | - K Hikosaka
- 5 Department of Infection and Host Defense, Chiba University, Chiba, Japan
| | - K Norose
- 5 Department of Infection and Host Defense, Chiba University, Chiba, Japan
| | - H Nakajima
- 1 Department of Allergy and Clinical Immunology, Chiba University Hospital, Chiba, Japan
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5
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Kajimoto R, Nakamura M, Inamura Y, Kamazawa K, Ikeuchi K, Iida K, Ishikado M, Murai N, Kira H, Nakatani T, Ohira-Kawamura S, Takahashi R, Kubo N, Kambara W, Nakajima K, Aizawa K. Status report of the chopper spectrometer 4SEASONS. ACTA ACUST UNITED AC 2018. [DOI: 10.1088/1742-6596/1021/1/012030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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6
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Mizuta H, Kawachi K, Yoshida H, Iida K, Okubo Y, Tohru M, Okuyama F, Yana K. Decision Support for Psychiatric Diagnosis Based on a Simple Questionnaire. Methods Inf Med 2018. [DOI: 10.1055/s-0038-1636858] [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: 10/17/2022]
Abstract
Abstract:This paper compares two classifiers: Pseudo Bayesian and Neural Network for assisting in making diagnoses of psychiatric patients based on a simple yes/no questionnaire which is provided at the outpatient’s first visit to the hospital. The classifiers categorize patients into three most commonly seen ICD classes, i.e. schizophrenic, emotional and neurotic disorders. One hundred completed questionnaires were utilized for constructing and evaluating the classifiers. Average correct decision rates were 73.3% for the Pseudo Bayesian Classifier and 77.3% for the Neural Network classifier. These rates were higher than the rate which an experienced psychiatrist achieved based on the same restricted data as the classifiers utilized. These classifiers may be effectively utilized for assisting psychiatrists in making their final diagnoses.
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Kawauchi K, Furuya S, Kikushima K, Tani S, Takahashi H, Iida K, Washio T, Niizuma S, Kobori M, Ashida T, Yagyu S, Matsumoto N, Hirayama A. P1564Do endothelial-dependent and -independent coronary microvascular dysfunction coexist in women with chest pain and unobstructed coronary arteries? Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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8
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Niizuma S, Furuya S, Kikushima K, Tani S, Takahashi H, Iida K, Washio T, Kawauchi K, Kobori M, Ashida T, Yagyu S, Matsumoto N, Hirayama A. P1579Does remote ischaemic preconditioning improve coronary blood flow? Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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9
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Takahashi H, Furuya S, Kikushima K, Tani S, Iida K, Washio T, Niizuma S, Kawauchi K, Kobori M, Ashida T, Yagyu S, Matsumoto N, Hirayama A. P1757High prevalence of coronary microvascular spasm in women as assessed using a Doppler guide-wire. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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10
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Yagyu S, Furuya S, Kikushima K, Tani S, Takahashi H, Iida K, Washio T, Niizuma S, Kawauchi K, Kobori M, Ashida T, Matsumoto N, Hirayama A. P1758High levels of LDL-C, apoB, and non-HDL-C associated with coronary microvascular dysfunction. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Furuya S, Takahashi H, Kikushima K, Tani S, Iida K, Washio T, Niizuma S, Kawauchi K, Kobori M, Ashida T, Yagyu S, Matsumoto N, Hirayama A. P5863Diagnostic accuracy of hyperemic instantaneous wave-free ratio for obstructive coronary artery disease based on lesion location. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p5863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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12
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Kogo T, Hiro T, Tamaki T, Mineki T, Kojima K, Yuzawa Y, Murata N, Iida K, Akutsu N, Oshima T, Haruta H, Fukamachi D, Takayama T, Hirayama A. P2351Spatial distribution of macrophage accumulation within coronary arterial wall in diabetic versus non-diabetic patients with acute coronary syndrome: a study with multi-intravascular imaging modalities. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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13
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Washio T, Furuya S, Kikushima K, Tani S, Takahashi H, Iida K, Niizuma S, Kawauchi K, Kobori M, Ashida T, Yagyu S, Matsumoto N, Hirayama A. P2387Instantaneous wave-free ratio can accurately predict the severity of coronary artery stenosis in patients under hemodialysis. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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14
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Grinenko V, Iida K, Kurth F, Efremov DV, Drechsler SL, Cherniavskii I, Morozov I, Hänisch J, Förster T, Tarantini C, Jaroszynski J, Maiorov B, Jaime M, Yamamoto A, Nakamura I, Fujimoto R, Hatano T, Ikuta H, Hühne R. Selective mass enhancement close to the quantum critical point in BaFe 2(As 1-x P x ) 2. Sci Rep 2017; 7:4589. [PMID: 28676703 PMCID: PMC5496881 DOI: 10.1038/s41598-017-04724-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 03/03/2017] [Accepted: 05/15/2017] [Indexed: 11/09/2022] Open
Abstract
A quantum critical point (QCP) is currently being conjectured for the BaFe2(As1-x P x )2 system at the critical value x c ≈ 0.3. In the proximity of a QCP, all thermodynamic and transport properties are expected to scale with a single characteristic energy, given by the quantum fluctuations. Such a universal behavior has not, however, been found in the superconducting upper critical field H c2. Here we report H c2 data for epitaxial thin films extracted from the electrical resistance measured in very high magnetic fields up to 67 Tesla. Using a multi-band analysis we find that H c2 is sensitive to the QCP, implying a significant charge carrier effective mass enhancement at the doping-induced QCP that is essentially band-dependent. Our results point to two qualitatively different groups of electrons in BaFe2(As1-x P x )2. The first one (possibly associated to hot spots or whole Fermi sheets) has a strong mass enhancement at the QCP, and the second one is insensitive to the QCP. The observed duality could also be present in many other quantum critical systems.
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Affiliation(s)
- V Grinenko
- Institute for Solid State Physics, TU Dresden, 01069, Dresden, Germany. .,IFW Dresden, Helmholtzstrasse 20, 01069, Dresden, Germany. .,Department of Crystalline Materials Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan.
| | - K Iida
- IFW Dresden, Helmholtzstrasse 20, 01069, Dresden, Germany.,Department of Crystalline Materials Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - F Kurth
- Institute for Solid State Physics, TU Dresden, 01069, Dresden, Germany.,IFW Dresden, Helmholtzstrasse 20, 01069, Dresden, Germany
| | - D V Efremov
- IFW Dresden, Helmholtzstrasse 20, 01069, Dresden, Germany
| | - S-L Drechsler
- IFW Dresden, Helmholtzstrasse 20, 01069, Dresden, Germany
| | - I Cherniavskii
- Lomonosov Moscow State University, GSP-1, Leninskie Gory, Moscow, 119991, Russian Federation
| | - I Morozov
- IFW Dresden, Helmholtzstrasse 20, 01069, Dresden, Germany.,Lomonosov Moscow State University, GSP-1, Leninskie Gory, Moscow, 119991, Russian Federation
| | - J Hänisch
- IFW Dresden, Helmholtzstrasse 20, 01069, Dresden, Germany.,Karlsruhe Institute of Technology, Institute for Technical Physics, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - T Förster
- Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01314, Dresden, Germany
| | - C Tarantini
- NHMFL, Florida State University, Tallahassee, FL, 32310, USA
| | - J Jaroszynski
- NHMFL, Florida State University, Tallahassee, FL, 32310, USA
| | - B Maiorov
- MPA-CMMS, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - M Jaime
- MPA-CMMS, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - A Yamamoto
- Department of Applied Physics, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo, 184-8588, Japan
| | - I Nakamura
- Department of Crystalline Materials Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - R Fujimoto
- Department of Crystalline Materials Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - T Hatano
- Department of Crystalline Materials Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - H Ikuta
- Department of Crystalline Materials Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - R Hühne
- IFW Dresden, Helmholtzstrasse 20, 01069, Dresden, Germany
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15
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Rahman M, Nakayama K, Rahman MT, Ishikawa M, Katagiri H, Katagiri A, Sato E, Iida K, Miyazaki K. Non-Hodgkin lymphoma of the female genital tract mimicking primary gynecological tumors: a single-center series of 3 cases. EUR J GYNAECOL ONCOL 2016; 37:117-121. [PMID: 27048122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
INTRODUCTION Malignant lymphoma of the female genital tract is quite rare and its presentation may resemble that of other, more common tumors, causing confusion for clinicians. CASE HISTORY The authors report three patients with a non-Hodgkin lymphoma (NHL) involving the female genital tract: two cases involved the ovary and one involved the uterus. In all patients, the genital tract was the initial site of clinical presentation of a B cell lymphoma. One patient was diagnosed postoperatively and subsequently received chemotherapy; the other two patients were diagnosed by imaging-guided biopsy and were successfully managed by chemotherapy without resection surgery. Two patients were alive, without evidence of disease, and one patient was alive with disease at their most recent follow-up visit. CONCLUSION The authors' experience emphasizes that lymphoma should be in the differential diagnosis of pelvic gynecological malignancies, and its clinical, biological, and radiological signs must be actively sought. Imaging-guided biopsy should be performed to avoid unnecessary surgery.
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16
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Barone C, Romeo F, Pagano S, Adamo M, Nappi C, Sarnelli E, Kurth F, Iida K. Probing transport mechanisms of BaFe₂As₂ superconducting films and grain boundary junctions by noise spectroscopy. Sci Rep 2014; 4:6163. [PMID: 25145385 PMCID: PMC4141261 DOI: 10.1038/srep06163] [Citation(s) in RCA: 24] [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: 06/16/2014] [Accepted: 07/31/2014] [Indexed: 11/09/2022] Open
Abstract
An important step forward for the understanding of high-temperature superconductivity has been the discovery of iron-based superconductors. Among these compounds, iron pnictides could be used for high-field magnet applications, resulting more advantageous over conventional superconductors, due to a high upper critical field as well as its low anisotropy at low temperatures. However, the principal obstacle in fabricating high quality superconducting wires and tapes is given by grain boundaries. In order to study these effects, the dc transport and voltage-noise properties of Co-doped BaFe₂As₂ superconducting films with artificial grain boundary junctions have been investigated. A specific procedure allows the separation of the film noise from that of the junction. While the former shows a standard 1/f behaviour, the latter is characterized by an unconventional temperature-dependent multi-Lorentzian voltage-spectral density. Moreover, below the film superconducting critical temperature, a peculiar noise spectrum is found for the grain boundary junction. Possible theoretical interpretation of these phenomena is proposed.
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Affiliation(s)
- C. Barone
- Dipartimento di Fisica “E.R. Caianiello”, Università di Salerno, I-84084 Fisciano, Salerno, Italy
- CNR-SPIN Salerno, Università di Salerno, I-84084 Fisciano, Salerno, Italy
| | - F. Romeo
- Dipartimento di Fisica “E.R. Caianiello”, Università di Salerno, I-84084 Fisciano, Salerno, Italy
- CNR-SPIN Salerno, Università di Salerno, I-84084 Fisciano, Salerno, Italy
| | - S. Pagano
- Dipartimento di Fisica “E.R. Caianiello”, Università di Salerno, I-84084 Fisciano, Salerno, Italy
- CNR-SPIN Salerno, Università di Salerno, I-84084 Fisciano, Salerno, Italy
| | - M. Adamo
- CNR-SPIN Salerno, Università di Salerno, I-84084 Fisciano, Salerno, Italy
| | - C. Nappi
- CNR-SPIN Napoli, Via Campi Flegrei 34, I-80078 Pozzuoli, Napoli, Italy
| | - E. Sarnelli
- CNR-SPIN Napoli, Via Campi Flegrei 34, I-80078 Pozzuoli, Napoli, Italy
| | - F. Kurth
- Leibniz-Institut für Festkörper- und Werkstoffforschung (IFW) Dresden, PO Box 270116, 01171 Dresden, Germany
| | - K. Iida
- Leibniz-Institut für Festkörper- und Werkstoffforschung (IFW) Dresden, PO Box 270116, 01171 Dresden, Germany
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17
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Klich I, Lee SH, Iida K. Glassiness and exotic entropy scaling induced by quantum fluctuations in a disorder-free frustrated magnet. Nat Commun 2014; 5:3497. [PMID: 24686398 PMCID: PMC3988808 DOI: 10.1038/ncomms4497] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [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: 10/16/2013] [Accepted: 02/21/2014] [Indexed: 11/25/2022] Open
Abstract
When spins are arranged in a lattice of triangular motif, the phenomenon of frustration leads to numerous energetically equivalent ground states, and results in exotic states such as spin liquid and spin ice. Here we report an alternative situation: a system, classically a liquid, freezes in the clean limit into a glassy state induced by quantum fluctuations. We call such glassy state a spin jam. The case in point is a frustrated magnet, where spins are arranged in a triangular network of bipyramids. Quantum corrections break the classical degeneracy into a set of aperiodic spin configurations forming local minima in a rugged energy landscape. This is established by mapping the problem into tiling with hexagonal tiles. The number of tessellations scales with the boundary length rather than its volume, showing the absence of local zero-energy modes. Low-temperature thermodynamics is discussed to compare it with other glassy materials. Spin liquids and spin ices arise when spins arranged on a lattice have several states that are close in energy, a phenomenon referred to as frustration. Here, Klich et al. show that quantum fluctuations can induce a spin liquid to freeze into a glassy state.
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Affiliation(s)
- I Klich
- 1] Department of Physics, University of Virginia, Charlottesville, Virginia 22904, USA [2]
| | - S-H Lee
- 1] Department of Physics, University of Virginia, Charlottesville, Virginia 22904, USA [2]
| | - K Iida
- Department of Physics, University of Virginia, Charlottesville, Virginia 22904, USA
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Ishikawa M, Nakayama K, Rahman MT, Rahman M, Katagiri H, Katagiri A, Ishibashi T, Iida K, Nakayama N, Miyazaki K. Therapy-related myelodysplastic syndrome and acute myeloid leukemia following chemotherapy (paclitaxel and carboplatin) and radiation therapy in ovarian cancer: a case report. EUR J GYNAECOL ONCOL 2014; 35:443-448. [PMID: 25118489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In recent years, the incidence of therapy-related myelodysplastic syndrome (t-MDS) and therapy-related acute myeloid leukemia (t-AML) that occur during chemotherapy for ovarian cancer has increased. While alkylating agents and topoisomerase II inhibitors are particularly mutagenic and have strong leukemogenic potential, paclitaxel and combination chemotherapy/radiation therapy also appear to induce t-MDS. The present authors report a case of t-MDS that developed during chemotherapy and radiation therapy for ovarian cancer. The patient was a 75-year-old woman who received six courses of cyclophosphamide/doxorubicin/cisplatin (CAP) therapy after initial surgery for Stage IIIc grade ovarian cancer in 1995. Beginning in February 2005, the patient experienced multiple recurrences due to sternal metastasis. Chemotherapy, including paclitaxel and carboplatin (TC), was administered intermittently and was combined with radiation therapy to a sternal metastatic lesion. Pancytopenia was observed in December 2008, and she was diagnosed with t-MDS (WHO subtype, refractory cytopenias with multilineage dysplasia [RCMD]): the time from first chemotherapy to t-MDS onset was 106 months. Without evidence of blast crisis, the recurrent lesions continued to grow and caused multiple cerebral infarctions, from which she eventually died. The cumulative doses of paclitaxel and carboplatin administered to this patient were 1,968 mg and 6,480 mg, respectively.
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19
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Iida K, Takeda-Kawaguchi T, Hada M, Yuriguchi M, Aoki H, Tamaoki N, Hatakeyama D, Kunisada T, Shibata T, Tezuka K. Hypoxia-enhanced derivation of iPSCs from human dental pulp cells. J Dent Res 2013; 92:905-10. [PMID: 23962749 DOI: 10.1177/0022034513502204] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Hypoxia enhances the reprogramming efficiency of human dermal fibroblasts to become induced pluripotent stem cells (iPSCs). Because we showed previously that hypoxia facilitates the isolation and maintenance of human dental pulp cells (DPCs), we examined here whether it promotes the reprogramming of DPCs to become iPSCs. Unlike dermal fibroblasts, early and transient hypoxia (3% O2) induced the transition of DPCs to iPSCs by 3.3- to 5.1-fold compared with normoxia (21% O2). The resulting iPSCs closely resembled embryonic stem cells as well as iPSCs generated in normoxia, as judged by morphology and expression of stem cell markers. However, sustained hypoxia strongly inhibited the appearance of iPSC colonies and altered their morphology, and anti-oxidants failed to suppress this effect. Transient hypoxia increased the expression levels of NANOG and CDH1 and modulated the expression of numerous genes, including those encoding chemokines and their receptors. Therefore, we conclude that hypoxia, when optimized for cell type, is a simple and useful tool to enhance the reprogramming of somatic cells to become iPSCs.
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Affiliation(s)
- K Iida
- Department of Oral and Maxillofacial Science, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu City, Gifu 501-1194, Japan
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Sudo M, Hiro T, Takayama T, Iida K, Akutsu N, Nishida T, Hayashida Y, Kawano T, Higuchi Y, Hirayama A. Comparison of mid-term thrombogenicity of everolimus- versus paclitaxel-eluting stents with the same stent platform.: a coronary angioscopic study. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hagisawa K, Nishioka T, Suzuki R, Maruyama K, Takase B, Ishihara M, Kurita A, Yoshimoto N, Nishida Y, Iida K, Luo H, Siegel RJ. Thrombus-targeted perfluorocarbon-containing liposomal bubbles for enhancement of ultrasonic thrombolysis: in vitro and in vivo study. J Thromb Haemost 2013; 11:1565-73. [PMID: 23773778 DOI: 10.1111/jth.12321] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [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: 12/05/2012] [Accepted: 06/09/2013] [Indexed: 11/29/2022]
Abstract
BACKGROUND External low-frequency ultrasound (USD) in combination with microbubbles has been reported to recanalize thrombotically occluded arteries in animal models. OBJECTIVE The purpose of this study was to examine the enhancing effect of thrombus-targeted bubble liposomes (BLs) developed for fresh thrombus imaging during ultrasonic thrombolysis. METHODS In vitro: after the administration of thrombus-targeted BLs or non-targeted BLs, the clot was exposed to low-frequency (27 kHz) USD for 5 min. In vivo: Rabbit iliofemoral arteries were thrombotically occluded, and an intravenous injection of either targeted BLs (n = 22) or non-targeted BLs (n = 22) was delivered. External low-frequency USD (low intensity, 1.4 W cm(-2) , to 12 arteries, and high intensity, 4.0 W cm(-2) , to 10 arteries, for both the targeted BL group and the non-targeted BL group) was applied to the thrombotically occluded arteries for 60 min. In another 10 rabbits, recombinant tissue-type plasminogen activator (rt-PA) was intravenously administered. RESULTS In vitro: the weight reduction rate of the clot with targeted BLs was significantly higher than that of the clot with non-targeted BLs. In vivo: TIMI grade 3 flow was present in a significantly higher number of rabbits with USD and targeted BLs than rabbits with USD and non-targeted BLs, or with rt-PA monotherapy. High-intensity USD exposure with targeted BLs achieved arterial recanalization in 90% of arteries, and the time to reperfusion was shorter than with rt-PA treatment (targeted BLs, 16.7 ± 5.0 min; rt-PA, 41.3 ± 14.4 min). CONCLUSIONS Thrombus-targeted BLs developed for USD thrombus imaging enhance ultrasonic disruption of thrombus both in vitro and in vivo.
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Affiliation(s)
- K Hagisawa
- Department of Physiology, National Defense Medical College, Tokorozawa, Japan
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Tsumura R, Ikawa K, Morikawa N, Ikeda K, Shibukawa M, Iida K, Kurisu K. The Pharmacokinetics and Pharmacodynamics of Meropenem in the Cerebrospinal Fluid of Neurosurgical Patients. J Chemother 2013; 20:615-21. [DOI: 10.1179/joc.2008.20.5.615] [Citation(s) in RCA: 15] [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: 10/31/2022]
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Chae SC, Horibe Y, Jeong DY, Lee N, Iida K, Tanimura M, Cheong SW. Evolution of the domain topology in a ferroelectric. Phys Rev Lett 2013; 110:167601. [PMID: 23679638 DOI: 10.1103/physrevlett.110.167601] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Indexed: 06/02/2023]
Abstract
Topological materials, including topological insulators, magnets with Skyrmions and ferroelectrics with topological vortices, have recently attracted phenomenal attention in the materials science community. Complex patterns of ferroelectric domains in hexagonal REMnO(3) (RE: rare earths) turn out to be associated with the macroscopic emergence of Z(2)×Z(3) symmetry. The results of our depth profiling of crystals with a self-poling tendency near surfaces reveal that the partial dislocation (i.e., wall-wall) interaction, not the interaction between vortices and antivortices, is primarily responsible for topological condensation through the macroscopic breaking of the Z(2) symmetry.
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Affiliation(s)
- S C Chae
- Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
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Schuetrumpf B, Klatt MA, Iida K, Maruhn JA, Mecke K, Reinhard PG. Time-Dependent Hartree-Fock Approach to Nuclear Pasta at Finite Temperature. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/426/1/012009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Nakayama K, Ishikawa M, Katagiri H, Katagiri A, Ishibashi T, Iida K, Nakayama N, Miyazaki K. Surgical treatment outcomes of serious chronic tubo-ovarian abscess: a single-center series of 20 cases. CLIN EXP OBSTET GYN 2013; 40:377-380. [PMID: 24283169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In recent years, Shimane University Hospital has begun to see patients with pelvic inflammatory disease (PID) which has become severe and chronic after insufficient conservative treatment in primary or secondary medical care facilities. Serious chronic tubo-ovarian abscess (TOA) is complicated by intraperitoneal inflammatory adhesions to surrounding organs, so that it is difficult to determine the original anatomical position of organs at surgery. Forcible synechotomy can result in damage to the adhering organs and insufficient drainage after surgery can cause recurrence of inflammation. In order to increase the chances for a successful surgical treatment, careful preparation, such as preoperative administration of antibiotics and ureteral stent insertion are necessary. In addition, the chances for recurrence of inflammation can be lessened by thorough intraperitoneal irrigation and insertion of a drainage tube.
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Affiliation(s)
- K Nakayama
- Department of Obstetrics and Gynecology, Shimane University School of Medicine, Izumo, Japan.
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Kataoka M, Yamagata S, Takagi H, Thant A, Akiyama S, Iida K, Watanabe T, Saga S, Kishi J, Hamaguchi M. Matrix metalloproteinase 2 and 9 in esophageal cancer. Int J Oncol 2012; 8:773-9. [PMID: 21544425 DOI: 10.3892/ijo.8.4.773] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
To search for the biochemical properties of esophageal carcinoma relevant to its aggressive behavior, we studied metalloproteinases released from surgical specimens of the carcinoma. In an assay with [H-3]-labeled gelatin, esophageal carcinoma tissues showed gelatinolytic activities clearly higher than those of paired normal mucosae. EDTA and TIMP-1 could strongly suppress these activities, suggesting that the activities belong to metalloproteinases. In addition, levels of TIMP-1 expression did not show good correlation with these activities, suggesting that tumor-specific elevation of gelatinolytic activity depended on metalloproteinase per se rather than the suppression of TIMP-1-secretion. By zymographic analysis, two gelatinase bands of 82- and 62-kDa were found specifically in carcinoma tissues, in addition to the other 6 bands detected both in normal and carcinoma tissues. Immunoprecipitation and immunoblotting of gelatinases with anti-MMP-9 or anti-MMP-2 monoclonal antibody, and treatment of the enzymes with APMA showed that these 82- and 62-kDa gelatinases were cleaved products of MMP-9 and MMP-2, respectively. These results imply that enhanced secretion and proteolytic activation of MMP-2 and MMP-9 take place specifically in the esophageal carcinoma tissues. Moreover, the levels of gelatinolytic activity expressed good correlation with the organ metastasis rate of the carcinoma, suggesting that MMPs play an important role in tumor metastasis.
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Affiliation(s)
- M Kataoka
- NAGOYA UNIV,SCH MED,DEPT MOL PATHOGENESIS,SHOWA KU,NAGOYA,AICHI 466,JAPAN. NAGOYA UNIV,SCH MED,DEPT SURG 2,SHOWA KU,NAGOYA,AICHI 466,JAPAN. NAGOYA UNIV,SCH MED,DEPT PATHOL 2,SHOWA KU,NAGOYA,AICHI 466,JAPAN. AICHI CANC CTR,RES INST,PATHOPHYSIOL UNIT,CHIKUSA KU,NAGOYA,AICHI 464,JAPAN. AICHI GAKUIN UNIV,SCH DENT,DEPT BIOCHEM,CHIKUSA KU,NAGOYA,AICHI 464,JAPAN
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Iida K, Lee SH, Cheong SW. Coexisting order and disorder hidden in a quasi-two-dimensional frustrated magnet. Phys Rev Lett 2012; 108:217207. [PMID: 23003299 DOI: 10.1103/physrevlett.108.217207] [Citation(s) in RCA: 4] [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] [Received: 01/06/2012] [Indexed: 06/01/2023]
Abstract
Frustrated magnetic interactions in a quasi-two-dimensional [111] slab of pyrochlore lattice were studied. For uniform nearest neighbor (NN) interactions, we show that the complex magnetic problem can be mapped onto a model with two independent degrees of freedom, tricolor and binary sign. This provides a systematic way to construct the complex classical spin ground states with collinear and coplanar bipyramid spins. We also identify "partial but extended" zero-energy excitations amongst the ground states. For nonuniform NN interactions, the coplanar ground state can be obtained from the collinear bipyramid spin state by collectively rotating two spins of each tetrahedron with an angle α in an opposite direction. The latter model with α~30° fits the experimental neutron data from SrCr(9p)Ga(12-9p)O(19) well.
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Affiliation(s)
- K Iida
- Department of Physics, University of Virginia, Charlottesville, Virginia 22904, USA
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Iida K, Nakayama K, Rahman MT, Rahman M, Ishikawa M, Katagiri A, Yeasmin S, Otsuki Y, Kobayashi H, Nakayama S, Miyazaki K. EGFR gene amplification is related to adverse clinical outcomes in cervical squamous cell carcinoma, making the EGFR pathway a novel therapeutic target. Br J Cancer 2011; 105:420-7. [PMID: 21730982 PMCID: PMC3172895 DOI: 10.1038/bjc.2011.222] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [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] [Indexed: 02/05/2023] Open
Abstract
Background: The aim of this study was to investigate the patterns of epidermal growth factor receptor (EGFR) overexpression, EGFR gene amplification, and the presence of activating mutations in the tyrosine kinase domain of this gene in squamous cell carcinomas and adenocarcinomas/adenosquamous carcinomas of the uterine cervix. Methods: The EGFR expression, amplification, and mutation in cervical carcinomas were assessed by immunohistochemistry, fluorescence in situ hybridisation, and PCR–SSCP, respectively, and correlated with clinical data collected by a retrospective chart review. A functional assessment was performed by inactivating EGFR in cervical cancer cells with the potent inhibitor AG1478. Results: Immunohistochemical analysis revealed that 6 out of 59 (10.2%) cervical squamous cell carcinomas showed significant amplification of the EGFR locus, whereas none of the 52 adeno/adenosquamous cell carcinomas had detectable EGFR amplification (P<0.05). The EGFR amplification significantly correlated with shorter overall survival (P=0.001) in cervical squamous cell carcinomas. Multivariate analysis showed that EGFR gene amplification was an independent prognostic factor for overall survival (P=0.011). None of the squamous cell carcinomas (0%: 0 out of 32) had detectable oncogenic mutations in EGFR exons 18 through 21. The frequencies of KRAS and BRAF mutations were very low in both squamous and adeno/adenosquamous cell carcinomas. Sensitivity of cervical cancer cells to AG1478 depended on the presence of EGFR overexpression. AG1478-induced EGFR inactivation in cell lines with EGFR overexpression significantly suppressed tumour development and progression in a mouse xenograft model. Conclusion: Our data suggest that EGFR signalling is important in a subset of cervical squamous cell carcinomas and that anti-EGFR therapy may benefit patients who carry the 7p11.2 amplicon in their tumours.
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Affiliation(s)
- K Iida
- Department of Obstetrics and Gynecology, Shimane University School of Medicine, Enyacho 89-1, Izumo, Shimane 6938501, Japan
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Horie M, Kawashima Y, Naka A, Matsumoto K, Kodera Y, Maeda T, Iida K. Proteomic Profiling of K-11706 Responsive Proteins. Int J Sports Med 2011; 32:559-64. [DOI: 10.1055/s-0031-1273741] [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: 10/18/2022]
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Kidszun M, Haindl S, Thersleff T, Hänisch J, Kauffmann A, Iida K, Freudenberger J, Schultz L, Holzapfel B. Critical current scaling and anisotropy in oxypnictide superconductors. Phys Rev Lett 2011; 106:137001. [PMID: 21517413 DOI: 10.1103/physrevlett.106.137001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Indexed: 05/30/2023]
Abstract
Having succeeded in the fabrication of epitaxial superconducting LaFeAsO(1-x)F(x) thin films we performed an extensive study of electrical transport properties. In the face of multiband superconductivity we can demonstrate that an anisotropic Ginzburg-Landau scaling of the angular dependent critical current densities can be adopted, although being originally developed for single band superconductors. In contrast with single band superconductors the mass anisotropy of LaFeAsO(1-x)F(x) is temperature dependent. A very steep increase of the upper critical field and the irreversibility field can be observed at temperatures below 6 K, indicating that the band with the smaller gap is in the dirty limit. This temperature dependence can be theoretically described by two dominating bands responsible for superconductivity. A pinning force scaling provides insight into the prevalent pinning mechanism and can be specified in terms of the Kramer model.
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Affiliation(s)
- M Kidszun
- IFW Dresden, Institute for Metallic Materials, P.O. Box 270116, 01171 Dresden, Germany. M.
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Lihan T, Mustapha M, Rahim S, Saitoh S, Iida K. Influence of River Plume on Variability of Chlorophyll a Concentration using Satellite Images. ACTA ACUST UNITED AC 2011. [DOI: 10.3923/jas.2011.484.493] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Nakayama K, Yeasmin S, Katagiri A, Rahman MT, Rahman M, Ishikawa M, Iida K, Nakayama N, Aoki S, Miyazaki K. A comparative study between microwave endometrial ablation and conventional surgical procedures for treatment of menorrhagia. CLIN EXP OBSTET GYN 2011; 38:33-37. [PMID: 21485722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
OBJECTIVE To compare microwave endometrial ablation (MEA) using a new curved applicator with conventional surgical procedures in 26 patients with menorrhagia. STUDY DESIGN Ten patients received MEA and 16 patients received conventional surgical procedures. Using a visual analog scale (VAS). MEA patients rated their menorrhagia, dysmenorrhea, and feelings of satisfaction from the procedure. The patients' intraoperative blood loss, operating time, and length of hospital stay were compared. RESULTS Following MEA, the VAS scores were significantly decreased in the MEA patients for menorrhagia (p < 0.0001) and dysmenorrhea (p = 0.0002). The average VAS score regarding feelings of satisfaction for MEA was 8.9 (full score = 10). Mean blood loss, operating time, and mean length of hospital stay were significantly decreased in the MEA group compared to the conventional surgical procedure group (p < 0.0001). CONCLUSION MEA successfully controlled menorrhagia and achieved a high rate of satisfaction among patients.
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Affiliation(s)
- K Nakayama
- Department of Obstetrics and Gynecology, Shimane University School of Medicine, Shimane, Japan.
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Tamaoki N, Takahashi K, Tanaka T, Ichisaka T, Aoki H, Takeda-Kawaguchi T, Iida K, Kunisada T, Shibata T, Yamanaka S, Tezuka K. Dental pulp cells for induced pluripotent stem cell banking. J Dent Res 2010; 89:773-8. [PMID: 20554890 DOI: 10.1177/0022034510366846] [Citation(s) in RCA: 173] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Defined sets of transcriptional factors can reprogram human somatic cells to induced pluripotent stem (iPS) cells. However, many types of human cells are not easily accessible to minimally invasive procedures. Here we evaluated dental pulp cells (DPCs) as an optimal source of iPS cells, since they are easily obtained from extracted teeth and can be expanded under simple culture conditions. From all 6 DPC lines tested with the conventional 3 or 4 reprogramming factors, iPS cells were effectively established from 5 DPC lines. Furthermore, determination of the HLA types of 107 DPC lines revealed 2 lines homozygous for all 3 HLA loci and showed that if an iPS bank is established from these initial pools, the bank will cover approximately 20% of the Japanese population with a perfect match. Analysis of these data demonstrates the promising potential of DPC collections as a source of iPS cell banks for use in regenerative medicine.
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Affiliation(s)
- N Tamaoki
- Department of Oral and Maxillofacial Science, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu City, Gifu 501-1194, Japan
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Imai T, Shindo Y, Utugi K, Iida K, Watanabe K, Mukai N, Kono I, Miyakawa S, Maeda A, Kitagawa Y, Kiso Y. Effects Of Rehydration On The Markers For Muscle Damage Enhanced By Endurance Exercise. Med Sci Sports Exerc 2010. [DOI: 10.1249/01.mss.0000384689.88942.c6] [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: 11/21/2022]
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Yeasmin S, Nakayama K, Katagiri A, Ishikawa M, Iida K, Nakayama N, Miyazaki K. Exaggerated placental site mimicking placental site trophoblastic tumor: case report and literature review. EUR J GYNAECOL ONCOL 2010; 31:586-589. [PMID: 21061810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Exaggerated placental site is defined as a non-neoplastic trophoblastic lesion featuring exuberant infiltration into the endometrium and myometrium by intermediate trophoblasts and syncytiotrophoblasts. Exaggerated placental site can occur following normal or ectopic pregnancy, abortion, or hydatidiform mole. We encountered a case of reactive exaggerated placental site seven months following normal pregnancy that clinically mimicked placental site trophoblastic tumor. Few reports have described the clinical course, histopathology and differential diagnosis of exaggerated placental site; we present our patient's case together with histopathological observations and review of related literature.
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Affiliation(s)
- S Yeasmin
- Department of Obstetrics and Gynecology, Shimane University School of Medicine, Izumo, Japan
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Paramita V, Iida K, Yoshii H, Furuta T. Effect of Feed Liquid Temperature on the Structural Morphologies ofâd-Limonene Microencapsulated Powder and Its Preservation. J Food Sci 2010; 75:E39-45. [DOI: 10.1111/j.1750-3841.2009.01406.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Mitsuishi T, Nakatake M, Kaneko T, Ohara K, Kato T, Iida K, Iwabu Y, Tokunaga K, Sata T, Kawana S, Yamada O. Evaluation of telomerase activity in non-genital Bowen's disease. J Eur Acad Dermatol Venereol 2009; 23:668-72. [PMID: 19250332 DOI: 10.1111/j.1468-3083.2009.03135.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
We investigated the level of telomerase activity (TA) in 17 specimens of non-genital Bowen's disease (BD) and in 14 specimens of skin without sun exposure (non-exposed skin) using a non-isotopic PCR-based telomeric repeat amplification protocol (TRAP) assay. Expression of human telomerase reverse transcriptase (hTERT; the catalytic subunit of telomerase) was also evaluated by immunochemistry in the non-genital BD tissues. Moderate to high levels of TA were detected in 41.2% of 17 non-genital BD specimens (P = 0.001). In contrast, TA was not evident in non-exposed skin. Recently, nucleolin was reported to be associated with hTERT, so we used this antibody instead of hTERT antibody. Immunohistochemistry showed that nucleolin expression was associated with high TA levels in non-genital BD. Our results also revealed differences of TA levels among non-genital BD specimens. High levels of TA in those specimens were not age related. Five out of 7 specimens (71.4%) with moderate to high TA levels were from sun-exposed sites, while the remaining 10 specimens with low levels of TA were from non-exposed sites. These results suggested that cellular DNA damage caused by ultraviolet irradiation might be associated with an increase of TA in non-genital BD. Among non-genital BD specimens, 4 out of 17 (23.5%) showed high levels of TA (median relative TA value: 79.8%; P = 0.003), which might be associated with immortalization or transformation to invasive squamous cell carcinoma.
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Affiliation(s)
- T Mitsuishi
- Department of Dermatology, Nippon Medical School, Tokyo, Japan.
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Takeda T, Tezuka Y, Horiuchi M, Hosono K, Iida K, Hatakeyama D, Miyaki S, Kunisada T, Shibata T, Tezuka K. Characterization of dental pulp stem cells of human tooth germs. J Dent Res 2008; 87:676-81. [PMID: 18573990 DOI: 10.1177/154405910808700716] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
In previous studies, human dental pulp stem cells (hDPSCs) were mainly isolated from adults. In this present study, we characterized hDPSCs isolated from an earlier developmental stage to evaluate the potential usage of these cells for tissue-regenerative therapy. hDPSCs isolated at the crown-completed stage showed a higher proliferation rate than those isolated at a later stage. When the cells from either group were cultured in medium promoting differentiation toward cells of the osteo/odontoblastic lineage, both became alkaline-phosphatase-positive, produced calcified matrix, and were also capable of forming dentin-like matrix on scaffolds in vivo. However, during long-term passage, these cells underwent a change in morphology and lost their differentiation ability. The results of a DNA array experiment showed that the expression of several genes, such as WNT16, was markedly changed with an increasing number of passages, which might have caused the loss of their characteristics as hDPSCs.
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Affiliation(s)
- T Takeda
- Department of Oral and Maxillofacial Science, Gifu University Graduate School of Medicine, Gifu, Japan
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Iida K, Nakajima Y, Kajiwara M. Synthesis of 1-Amino-2-[3-13C]propanol Hydrochloride: Completion of Synthetic Methods for all of its 13C- and 15N-Isotopomers. Curr Radiopharm 2008. [DOI: 10.2174/1874471010801020120] [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: 11/22/2022]
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Iida K, Shionyu M, Suso Y. Alternative Splicing at NAGNAG Acceptor Sites Shares Common Properties in Land Plants and Mammals. Mol Biol Evol 2008; 25:709-18. [DOI: 10.1093/molbev/msn015] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yeasmin S, Nakayama K, Ishibashi M, Oride A, Katagiri A, Purwana IN, Iida K, Nakayama N, Ishikura H, Miyazaki K. Therapy-related myelodysplasia and acute myeloid leukemia following paclitaxel- and carboplatin-based chemotherapy in an ovarian cancer patient: a case report and literature review. Int J Gynecol Cancer 2008; 18:1371-6. [PMID: 18217963 DOI: 10.1111/j.1525-1438.2007.01185.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Alkylating agents have strong leukemogenic potential. There are a number of recent acute myeloid leukemia (t-AML) cases related to previous paclitaxel exposure. These leukemias tend to be of aggressive subtypes with long-latency periods. Unlike previously reported cases, the present case was of the secondary acute megakaryoblastic myeloid leukemia (AML M7) subtype. Additionally, it did not harbor a translocation in chromosome 19. A 73-year-old woman was diagnosed with t-AML M7 with antecedent myelodysplasia. Leukemia followed a second induction of paclitaxel- and carboplatin-based chemotherapy for recurrent ovarian cancer. Her second induction began 25 months after completion of her first course of chemotherapy. The increased incidence of postpaclitaxel leukemia suggests a probable role for paclitaxel as a leukemogenic agent. It highlights the importance of assessing for leukemia risk factors prior to beginning paclitaxel therapy.
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Affiliation(s)
- S Yeasmin
- Department of Obstetrics and Gynecology, Shimane University School of Medicine, Izumo, Shimane, Japan
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Yeasmin S, Nakayama K, Oride A, Ishibashi M, Ishikawa N, Katagiri A, Iida K, Nakayama N, Miyazaki K. A case of extremely chemoresistant pure pleomorphic rhabdomyosarcoma of the uterus associated with a high serum LDH level. EUR J GYNAECOL ONCOL 2008; 29:518-522. [PMID: 19051826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
BACKGROUND Pleomorphic rhabdomyosarcoma (RMS) of gynecologic origin is an exceedingly rare, highly malignant tumor. Only a few cases have been reported in the last decades. CASE REPORT A 60-year-old postmenopausal woman presented with a high LDH level of unknown origin. Ultimately, she was diagnosed with pleomorphic RMS. She underwent total hysterectomy, bilateral salpingo-oophorectomy, left pelvic and paraaortic lymphadenectomy and partial omentectomy. Surgery was followed by systemic chemotherapy and pelvic irradiation. Unfortunately, the patient did not respond to treatment. Her disease course correlated with the fluctuation of plasma LDH levels. Ultimately she died within 20 months of the diagnosis. CONCLUSION It is important to have better insight and to set a standard multimodal treatment for adult RMS. In addition, plasma LDH levels can be considered as a prognostic marker for RMS, particularly in advanced stage.
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Affiliation(s)
- S Yeasmin
- Department of Obstetrics and Gynecology, Shimane University School of Medicine, Izumo, Japan
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Iida K, Kawabata S, Miyatake S, Miyata S, Kuroiwa T, Kirihata M, Ono K, Kumada H. BNCT Displays Growth-inhibitory Effect on Malignant Meningioma Cell In Vivo. Int J Radiat Oncol Biol Phys 2007. [DOI: 10.1016/j.ijrobp.2007.07.1670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Iida K, Kawabata S, Miyatake S, Miyata S, Kuroiwa T, Kirihata M, Ono K, Kumada H. 947 POSTER Target volume reduction in the treatment of malignant meningioma by boron neutron capture therapy. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)70586-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Kasugai H, Nagamatsu K, Miyake Y, Honshio A, Kawashima T, Iida K, Iwaya M, Kamiyama S, Amano H, Akasaki I, Kinoshita H, Shiomi H. Light extraction process in moth-eye structure. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/pssc.200565319] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Abstract
There is significant heterogeneity in serum IGF-I concentrations among normal healthy individuals across all ages and among inbred strains of mice. C3H/HeJ (C3H) mice have 30% higher serum IGF-I concentrations over a lifetime than C57BL/6J (B6), even though body size and length are identical. The underlying mechanism for this disparity remains unknown although several possibilities exist including altered GH secretion, resistance to GH action, or impaired IGF-I secretion from the liver or peripheral tissues. To study this further, we evaluated mRNA levels of pituitary GH, and of IGF-I, GH receptor (GHR) and acid-labile subunit (ALS) in liver and skeletal muscle of male C3H and B6 strains. mRNA levels of hepatic IGF-I paralleled serum IGF-I levels, whereas pituitary GH mRNA expression was significantly lower in C3H than B6. In addition, reduced hepatic mRNA levels of ALS and GHR in B6 suggests hepatic GH resistance in B6. In contrast, mRNA levels of IGF-I and GHR in skeletal muscle were not different between B6 and C3H. There was a single sequence repeat polymorphism (SSR) in the promoter region of both GHR and IGF-I genes in mice; the SSR in the IGF-I gene was significantly different between the two strains. The SSR in the IGF-I gene corresponds to the E2F binding site, which is critical for regulating IGF-I gene expression. These results suggest that the SSR in the promoter region of the IGF-I gene may be partially responsible for differences in serum IGF-I levels between B6 and C3H strains.
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Affiliation(s)
- K Iida
- Division of Endocrinology and Metabolism, Department of Internal Medicine, University of Virginia, Charlottesville, Virginia 22908, USA
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Iida K, Matsuura T, Tachibana M, Hatsuda T. Melting pattern of diquark condensates in quark matter. Phys Rev Lett 2004; 93:132001. [PMID: 15524708 DOI: 10.1103/physrevlett.93.132001] [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: 01/21/2004] [Indexed: 05/24/2023]
Abstract
Thermal color superconducting phase transitions in high density three-flavor quark matter are investigated in the Ginzburg-Landau approach. The effects of nonzero strange quark mass, electric and color charge neutrality, and direct instantons are considered. Weak coupling calculations show that an interplay between the mass and electric neutrality effects near the critical temperature gives rise to three successive second-order phase transitions as the temperature increases: a modified color-flavor locked (mCFL) phase (ud, ds, and us pairings) --> a d-quark superconducting (dSC) phase (ud and ds pairings) --> an isoscalar pairing phase (ud pairing) --> a normal phase (no pairing). The dSC phase is novel in the sense that while all eight gluons are Meissner screened as in the mCFL phase, three out of nine quark quasiparticles are always gapless.
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Affiliation(s)
- K Iida
- The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan
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Iida K, Hanafusa M, Maekawa I, Kudo T, Takahashi K, Yoshioka S, Kishimoto M, Iguchi G, Tsukamoto T, Okimura Y, Kaji H, Chihara K. A novel splice site mutation of the thiazide- sensitive NaCl cotransporter gene in a Japanese patient with Gitelman syndrome. Clin Nephrol 2004; 62:180-4. [PMID: 15481849 DOI: 10.5414/cnp62180] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [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: 11/18/2022] Open
Abstract
Gitelman syndrome (GS, MIM 263800) is an inherited disorder characterized by metabolic alkalosis with hypokalemia, hypomagnesemia, and hypocalciuria. The genetic abnormalities causing GS are known to lie in the thiazide-sensitive NaCl cotransporter (TSC), which is expressed in the distal tubule of the kidney. The TSC gene, located at chromosome 16, consists of 26 exons and encodes the protein containing 12 putative transmembrane domains with long intracellular amino and carboxy termini. Most of the abnormalities identified in GS were missense mutations, distributed throughout the TSC gene without a hot spot. A 42-year-old Japanese man was introduced for close examination of hypokalemia. In renal clearance studies using furosemide or thiazide, chloride clearance was increased after furosemide but not after thiazide administration. Furthermore, the distal fractional chloride reabsorption was dramatically decreased by furosemide but not thiazide administration, suggesting a defect in the distal tubule. We then analyzed the TSC gene to confirm the diagnosis of GS, and identified a novel G to T mutation at the acceptor splice site preceding exon 14, resulting in disruption of a conventional 3'AG consensus splice site. Abnormal splicing by this mutation is predicted to cause the formation of truncated TSC with a partial deletion of the transmembrane domain, which will loose the function of transporter. In conclusion, we have identified a unique novel splice site mutation of the TSC gene in GS. The predicted structure of this mutant TSC can conceivably cause an impairment of the transporter activity and thereby be responsible for the development of GS in our patient.
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Affiliation(s)
- K Iida
- Department of Clinical Molecular Medicine, Division of Endocrinology/Metabolism, Neurology and Hematology/Oncology, Kobe University Graduate School of Medicine, Kobe, Japan.
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Amano H, Miyazaki A, Iida K, Kawashima T, Iwaya M, Kamiyama S, Akasaki I, Liu R, Bell A, Ponce FA, Sahonta S, Cherns D. Defect and stress control of AlGaN for fabrication of high performance UV light emitters. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/pssa.200405044] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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