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Wallner A, Froehlich MB, Hotchkis MAC, Kinoshita N, Paul M, Martschini M, Pavetich S, Tims SG, Kivel N, Schumann D, Honda M, Matsuzaki H, Yamagata T. 60Fe and 244Pu deposited on Earth constrain the r-process yields of recent nearby supernovae. Science 2021; 372:742-745. [PMID: 33986180 DOI: 10.1126/science.aax3972] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 04/12/2021] [Indexed: 11/02/2022]
Abstract
Half of the chemical elements heavier than iron are produced by the rapid neutron capture process (r-process). The sites and yields of this process are disputed, with candidates including some types of supernovae (SNe) and mergers of neutron stars. We search for two isotopic signatures in a sample of Pacific Ocean crust-iron-60 (60Fe) (half-life, 2.6 million years), which is predominantly produced in massive stars and ejected in supernova explosions, and plutonium-244 (244Pu) (half-life, 80.6 million years), which is produced solely in r-process events. We detect two distinct influxes of 60Fe to Earth in the last 10 million years and accompanying lower quantities of 244Pu. The 244Pu/60Fe influx ratios are similar for both events. The 244Pu influx is lower than expected if SNe dominate r-process nucleosynthesis, which implies some contribution from other sources.
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Affiliation(s)
- A Wallner
- Department of Nuclear Physics, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia. .,Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany
| | - M B Froehlich
- Department of Nuclear Physics, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia
| | - M A C Hotchkis
- Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia
| | - N Kinoshita
- Institute of Technology, Shimizu Corporation, Tokyo 135-8530, Japan
| | - M Paul
- Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - M Martschini
- Department of Nuclear Physics, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia
| | - S Pavetich
- Department of Nuclear Physics, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia
| | - S G Tims
- Department of Nuclear Physics, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia
| | - N Kivel
- Laboratory of Radiochemistry, Department for Nuclear Energy and Safety, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - D Schumann
- Laboratory of Radiochemistry, Department for Nuclear Energy and Safety, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - M Honda
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Ibaraki 305-8577, Japan
| | - H Matsuzaki
- Micro Analysis Laboratory, Tandem Accelerator, The University Museum, The University of Tokyo, Tokyo 113-0032, Japan
| | - T Yamagata
- Micro Analysis Laboratory, Tandem Accelerator, The University Museum, The University of Tokyo, Tokyo 113-0032, Japan
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Tan SPV, Bautista AT, Mendoza NDS, Racadio CDT, Puthenpurekal M, Resurreccion AC, Matsuzaki H. Iodine-129 for determining the origin of salinity in groundwater in Pampanga, Philippines. J Environ Radioact 2020; 218:106239. [PMID: 32421573 DOI: 10.1016/j.jenvrad.2020.106239] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 10/07/2019] [Revised: 03/07/2020] [Accepted: 03/09/2020] [Indexed: 06/11/2023]
Abstract
Assessing groundwater vulnerability from salinity contamination is vital and relevant to meet the increasing demand for freshwater. Iodine-129 (129I, half-life = 15.7 million years), a radioisotope of iodine, was used as an environmental tracer for the possible origin of salinization in groundwater (e.g., natural rock weathering, evaporated water, seawater, brine fossil water, contamination). In July 2017 (wet season), thirty-two (32) water samples were taken from production wells of different localities in Pampanga, a province in the Philippines that relies heavily on groundwater for freshwater sources. Hydrogeochemical (mainly Cl) and stable water isotopes (δ2H and δ18O) were able to identify seven samples potentially affected by seawater intrusion. The salinity origin of these samples was investigated using iodine-129 and iodine-127 isotopes by generating two graphs: 129I vs. chloride and 129I/127I ratio vs. 1/127I. 129I vs. Cl graph was capable of showing a clear distinction between different salinity origins. Five out of the seven samples were being affected by evaporated water, one sample from possible wastewater, and one sample from brine fossil water. A conceptual model was produced to summarize the results. Compiled end-members (e.g., natural brine, seawater, modern rain) were plotted in the 129I/127I ratio vs. 1/127I graph to show the interaction between two recharge sources. The results of this study will be helpful to the government, civil society, and other organizations for monitoring, policymaking, and management of the groundwater and the subsurface formations that will be crucial to continuously supply the freshwater needs of the present and future generation.
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Affiliation(s)
- S P V Tan
- Environmental Engineering Program, University of the Philippines, Quezon City, 1101, Philippines.
| | - A T Bautista
- Department of Science and Technology - Philippine Nuclear Research Institute (DOST-PNRI), Quezon City, 1101, Philippines
| | - N D S Mendoza
- Department of Science and Technology - Philippine Nuclear Research Institute (DOST-PNRI), Quezon City, 1101, Philippines
| | - C D T Racadio
- Department of Science and Technology - Philippine Nuclear Research Institute (DOST-PNRI), Quezon City, 1101, Philippines
| | - M Puthenpurekal
- Department of Environment and Natural Resources - Mines and Geosciences Bureau (DENR-MGB), Quezon City, 1100, Philippines
| | - A C Resurreccion
- Environmental Engineering Program, University of the Philippines, Quezon City, 1101, Philippines
| | - H Matsuzaki
- Micro Analysis Laboratory, Tandem Accelerator (MALT), University of Tokyo, Bunkyo-ku, 113-8654, Japan
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Tsuji S, Matsuzaki H, Iseki M, Nagasu A, Hirano H, Ishihara K, Ueda N, Honda Y, Horiuchi T, Nishikomori R, Morita Y, Mukai T. Functional analysis of a novel G87V TNFRSF1A mutation in patients with TNF receptor-associated periodic syndrome. Clin Exp Immunol 2019; 198:416-429. [PMID: 31429073 DOI: 10.1111/cei.13365] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 08/14/2019] [Indexed: 12/17/2022] Open
Abstract
Tumor necrosis factor (TNF) receptor-associated periodic syndrome (TRAPS) is an autoinflammatory disease that is caused by heterozygous mutations in the TNFRSF1A gene. Although more than 150 TNFRSF1A mutations have been reported to be associated with TRAPS phenotypes only a few, such as p.Thr79Met (T79M) and cysteine mutations, have been functionally analyzed. We identified two TRAPS patients in one family harboring a novel p.Gly87Val (G87V) mutation in addition to a p.Thr90Ile (T90I) mutation in TNFRSF1A. In this study, we examined the functional features of this novel G87V mutation. In-vitro analyses using mutant TNF receptor 1 (TNF-R1)-over-expressing cells demonstrated that this mutation alters the expression and function of TNF-R1 similar to that with the previously identified pathogenic T79M mutation. Specifically, cell surface expression of the mutant TNF-R1 in transfected cells was inhibited with both G87V and T79M mutations, whereas the T90I mutation did not affect this. Moreover, peripheral blood mononuclear cells (PBMCs) from TRAPS patients harboring the G87V and T90I mutations showed increased mitochondrial reactive oxygen species (ROS). Furthermore, the effect of various Toll-like receptor (TLR) ligands on inflammatory responses was explored, revealing that PBMCs from TRAPS patients are hyper-responsive to TLR-2 and TLR-4 ligands and that interleukin (IL)-8 and granulocyte-macrophage colony-stimulating factor (GM-CSF) are likely to be involved in the pathogenesis of TRAPS. These findings suggest that the newly identified G87V mutation is one of the causative mutations of TRAPS. Our findings based on unique TRAPS-associated mutations provide novel insight for clearer understanding of inflammatory responses, which would be basic findings of developing a new therapeutic and prophylactic approach to TRAPS.
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Affiliation(s)
- S Tsuji
- Department of Rheumatology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - H Matsuzaki
- Department of Life Sciences, Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, Shobara, Hiroshima, Japan
| | - M Iseki
- Department of Immunology and Molecular Genetics, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - A Nagasu
- Department of Rheumatology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - H Hirano
- Department of Rheumatology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - K Ishihara
- Department of Immunology and Molecular Genetics, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - N Ueda
- Department of Internal Medicine, Miyazaki Prefectural Miyazaki Hospital, Miyazaki, Japan
| | - Y Honda
- Department of Pediatrics, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - T Horiuchi
- Department of Internal Medicine, Kyushu University Beppu Hospital, Beppu, Oita, Japan
| | - R Nishikomori
- Department of Pediatrics, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Department of Pediatrics and Child Health, Kurume University School of Medicine, Kurume, Fukuoka, Japan
| | - Y Morita
- Department of Rheumatology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - T Mukai
- Department of Rheumatology, Kawasaki Medical School, Kurashiki, Okayama, Japan
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Tamanuki T, Namura M, Aoyagi T, Shimizu S, Suwa T, Matsuzaki H. Efficacy of using imprint and exfoliative cytology followed by frozen section as intraoperative margin assessment in breast conservation surgery. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz098.015] [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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Du L, Xi W, Zhang J, Matsuzaki H, Furube A. Electron transfer dynamics and yield from gold nanoparticle to different semiconductors induced by plasmon band excitation. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.04.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Motomura C, Matsuzaki H, Ono R, Iwata M, Okabe K, Akamine Y, Wakatsuki M, Murakami Y, Taba N, Odajima H. Aspirin is an enhancing factor for food-dependent exercise-induced anaphylaxis in children. Clin Exp Allergy 2017; 47:1497-1500. [PMID: 28892197 DOI: 10.1111/cea.13026] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- C Motomura
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - H Matsuzaki
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - R Ono
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - M Iwata
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - K Okabe
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - Y Akamine
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - M Wakatsuki
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - Y Murakami
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - N Taba
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - H Odajima
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
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Shinojima N, Matsuzaki H, Takeshima Y, Maenaka A, Makino K, Yamamoto K, Saito Y, Kuratsu J, Nakamura H, Yano S. P18.11 The effect of ketogenic diet on survival and quality of life in patients with malignant brain tumors in palliative care. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.475] [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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Shinojima N, Matsuzaki H, Maenaka A, Makino K, Yamamoto K, Takeshima Y, Kuratsu J, Nakamura H, Yano S. P19.05 Safety and tumor inhibitory effect of ketogenic diet for pediatric patients with malignant brain tumors. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Nakamura N, Miyazaki T, Matsuzaki H, Furuya R, Miyajima S, Irie S, Matsuoka H, Tanaka M. Experience of Quatro-Therapy With Everolimus to Minimize Calcineurin Inhibitor for Kidney Transplant Recipients. Transplant Proc 2017; 49:32-36. [PMID: 28104152 DOI: 10.1016/j.transproceed.2016.11.005] [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: 10/20/2022]
Abstract
BACKGROUND This study was divided into three phases, on the occasion of the introduction of everolimus (EVR) in our hospital. METHODS In the first phase, a study group of six maintenance patients (three living related donors, three deceased donors) who had a history of malignant disease with less than 500 mg/day of proteinuria were enrolled; a high serum creatinine and upper limit of duration after kidney transplant operation was not considered. EVR was discontinued in four of the six patients because of side effects or worsening renal function. The second phase comprised a study group of 12 maintenance patients (12 living related donors) who were more than 5 years after kidney transplant operation with serum creatinine <3 ng/mL and proteinuria <500 mg/day. In two patients, EVR was discontinued because of a skin rash or general fatigue, but EVR was continued in 10 cases. Calcineurin inhibitor (CNI) dosage was reduced and renal function improved, and mean estimated glomerular filtration rate recovered from 42.3 mL/min to 44.8 mL/min, with no rejections occurring. In the third phase, a study group of eight de novo transplant patients who were 2 to 3 weeks after transplant operation were examined. In one case, EVR was discontinued because of proteinuria but was restarted with a stepwise increasing method after 4 months and was continued without any side effects. RESULTS Our study indicates that EVR was a useful drug for the maintenance of kidney transplant recipients for the optimal patients. CONCLUSIONS In de novo cases, EVR plus a high dose of mizoribine and low CNI protocol was a useful regimen without serious adverse effects.
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Affiliation(s)
- N Nakamura
- Department of Urology, Fukuoka University Hospital, Fukuoka, Japan.
| | - T Miyazaki
- Department of Urology, Fukuoka University Hospital, Fukuoka, Japan
| | - H Matsuzaki
- Department of Urology, Fukuoka University Hospital, Fukuoka, Japan
| | - R Furuya
- Department of Urology, Fukuoka University Hospital, Fukuoka, Japan
| | - S Miyajima
- Department of Urology, Fukuoka University Hospital, Fukuoka, Japan
| | - S Irie
- Department of Urology, Fukuoka University Hospital, Fukuoka, Japan
| | - H Matsuoka
- Department of Urology, Fukuoka University Hospital, Fukuoka, Japan
| | - M Tanaka
- Department of Urology, Fukuoka University Hospital, Fukuoka, Japan
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Nakamura R, Matsuzaki H, Sakamoto M, Suda K, Hayama S, Sangai T. Abstract P1-07-15: The outcomes for super elderly patients over 80 years old after breast cancer surgery. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p1-07-15] [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: 11/16/2022]
Abstract
Abstract
(Purpose)
Considering the dramatic increase in average life expectancy throughout the world, the management of super-elderly patients over 80 years old (SEP) with breast cancer has become a global issue. However, there have been few clinical trials for SEP until now. The reasons for this were a small population, unpredictable prognosis, a large number of non-cancer-related deaths and a lower function of multiple organs in SEP. Surgical treatment or post-operative treatment based on evidence of clinical trials for SEP has also not been unclear. We hypothesized that the outcome of SEP with breast cancer compared with other ages were similarly depended on the breast cancer subtypes.
The aim of this study was to clarify the breast cancer related survival (BRS) rate and overall survival (OS) rate at 5years for SEP according to breast cancer subtype.
(Methods)
We retrospectively analyzed 407 patients over 80 years old at initial operation between April, 1994 and April 2015 from 4 institutions of Chiba Youth Breast Oncology Research Group.
Overall, 366 patients with stage I to Stage IIIc were included.
41 patients with Stage 0 or IV were excluded in this study.
We compared the clinical characteristics, OS and BRS rates among the breast cancer subtype: such as ER positive HER2 negative (ER group), ER negative HER2 negative (TN group), ER negative HER2 positive (HER2 group) and ER positive HER2 positive (ER/HER2 group).
Univariate and multivariate analyses were performed to identify the factors of Tumor size, Lymph node, Ly, ER, HER2 and characteristics, associated with the OS and BRS.
(Results)
The median age of the 366 patients was 83 years (range 80-96 years).The median follow-up duration was 32 months (range, 2-120).
During the follow-up period, 25 (9.4%) patients in the ER group, 19 (27.5%) in TN group, 4 (22.2%) in HER2 group and 2 (20.0%) patients in ER-HER2 group died.
The 5 year OS and BRS rates were 89.2%, 97.1% in ER group, 64.6%, 81.2% in TN group, 61.5%,33.3% in HER2 group and 83.3%, 100% in ER-HER2 group, respectively.
Univariate and multivariate analyses revealed that ER was one prognostic factor to OS and BRS.
ER positive patients treatment with Aromatase inhibitor had significantly longer survival rates than treatment with Tamoxifen or no treatment (p=0.05).
There were no significant differences in OS or BRS of TN patients according to the use of chemotherapy (n=7) versus non treatment (n=61).
(Conclusions)
The prognosis and clinical course of super elderly patients with breast cancer depended on subtype.
Adjuvant therapy for ER group was one prognostic factor to OS and BRS.
Citation Format: Nakamura R, Matsuzaki H, Sakamoto M, Suda K, Hayama S, Sangai T. The outcomes for super elderly patients over 80 years old after breast cancer surgery. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P1-07-15.
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Affiliation(s)
- R Nakamura
- Chiba Cancer Center Hospital, Chiba, Japan; Funabashi Municipal Medical Center; Kameda Medical Center; Juntendou University Urayasu Hospital; Chiba University
| | - H Matsuzaki
- Chiba Cancer Center Hospital, Chiba, Japan; Funabashi Municipal Medical Center; Kameda Medical Center; Juntendou University Urayasu Hospital; Chiba University
| | - M Sakamoto
- Chiba Cancer Center Hospital, Chiba, Japan; Funabashi Municipal Medical Center; Kameda Medical Center; Juntendou University Urayasu Hospital; Chiba University
| | - K Suda
- Chiba Cancer Center Hospital, Chiba, Japan; Funabashi Municipal Medical Center; Kameda Medical Center; Juntendou University Urayasu Hospital; Chiba University
| | - S Hayama
- Chiba Cancer Center Hospital, Chiba, Japan; Funabashi Municipal Medical Center; Kameda Medical Center; Juntendou University Urayasu Hospital; Chiba University
| | - T Sangai
- Chiba Cancer Center Hospital, Chiba, Japan; Funabashi Municipal Medical Center; Kameda Medical Center; Juntendou University Urayasu Hospital; Chiba University
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Matsuzaki H, Iwata M, Miyamoto T, Terashige T, Iwano K, Takaishi S, Takamura M, Kumagai S, Yamashita M, Takahashi R, Wakabayashi Y, Okamoto H. Excitation-photon-energy selectivity of photoconversions in halogen-bridged Pd-chain compounds: Mott insulator to metal or charge-density-wave state. Phys Rev Lett 2014; 113:096403. [PMID: 25215998 DOI: 10.1103/physrevlett.113.096403] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Indexed: 06/03/2023]
Abstract
Ultrafast photoinduced transitions of a one-dimensional Mott insulator into two distinct electronic phases, metal and charge-density-wave (CDW) state, were achieved in a bromine-bridged Pd-chain compound [Pd(en)2Br](C5-Y)2H2O (en=ethylenediamine and C5-Y=dialkylsulfosuccinate), by selecting the photon energy of a femtosecond excitation pulse. For the resonant excitation of the Mott-gap transition, excitonic states are generated and converted to one-dimensional CDW domains. For the higher-energy excitation, free electron and hole carriers are produced, giving rise to a transition of the Mott insulator to a metal. Such selectivity in photoconversions by the choice of initial photoexcited states opens a new possibility for the developments of advanced optical switching and memory functions.
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Affiliation(s)
- H Matsuzaki
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - M Iwata
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - T Miyamoto
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - T Terashige
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - K Iwano
- Institute of Materials Structure Science, Graduate University for Advanced Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - S Takaishi
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - M Takamura
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - S Kumagai
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - M Yamashita
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - R Takahashi
- Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - Y Wakabayashi
- Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - H Okamoto
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
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Omori Y, Saeki H, Ito K, Matsuzaki H, Tokita M, Itoh M, Tanito K, Ishiji T, Fukunaga M, Nakagawa H. Solitary fibrous tumour of the scalp. Clin Exp Dermatol 2014; 39:539-41. [PMID: 24712870 DOI: 10.1111/ced.12309] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/17/2013] [Indexed: 11/28/2022]
Affiliation(s)
- Y Omori
- Department of Dermatology, The Jikei University School of Medicine, 3-25-8, Nishishimbashi, Minato-ku, Tokyo, 105-8461, Japan
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Rampias T, Giagini A, Siolos S, Matsuzaki H, Sasaki C, Scorilas A, Psyrri A. RAS/PI3K Crosstalk and Cetuximab Resistance in Head and Neck Squamous Cell Carcinoma. Clin Cancer Res 2014; 20:2933-46. [DOI: 10.1158/1078-0432.ccr-13-2721] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [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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14
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Fujita M, Matsuzaki H, Yanagi Y, Hara M, Katase N, Hisatomi M, Unetsubo T, Konouchi H, Nagatsuka H, Asaumi JI. Diagnostic value of MRI for odontogenic tumours. Dentomaxillofac Radiol 2013; 42:20120265. [PMID: 23468124 DOI: 10.1259/dmfr.20120265] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To evaluate the diagnostic value of MRI for odontogenic tumours. MATERIALS AND METHODS 51 patients with odontogenic tumours were subjected to pre-operative MRI examinations. For tumours with liquid components, i.e. ameloblastomas and keratocystic odontogenic tumours (KCOTs), the signal intensity (SI) uniformity of their cystic components (UΣ) was calculated and then their UΣ values were compared. For tumours with solid components that had been examined using dynamic contrast-enhanced MRI (DCE-MRI), their CImax (maximum contrast index), Tmax (the time when CImax occurred), CIpeak (CImax × 0.90), Tpeak (the time when CIpeak occurred) and CI300 (i.e. the CI observed at 300 s after contrast medium injection) values were determined from CI curves. We then classified the odontogenic tumours according to their DCE-MRI parameters. RESULTS Significant differences between the UΣ values of the ameloblastomas and KCOT were observed on T1 weighted images, T2 weighted images and short TI inversion recovery images. Depending on their DCE-MRI parameters, we classified the odontogenic tumours into the following five types: Type A, CIpeak > 2.0 and Tpeak < 200 s; Type B, CIpeak < 2.0 and Tpeak < 200 s; Type C, CI300 > 2.0 and Tmax < 600 s; Type D, CI300 > 2.0 and Tmax > 600 s; Type E, CI300 < 2.0 and Tmax > 600 s. CONCLUSION Cystic component SI uniformity was found to be useful for differentiating between ameloblastomas and KCOT. However, the DCE-MRI parameters of odontogenic tumours, except for odontogenic fibromas and odontogenic myxomas, contributed little to their differential diagnosis.
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Affiliation(s)
- M Fujita
- Department of Oral and Maxillofacial Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama City, Okayama, Japan
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Tao S, Ohtani N, Uchida R, Miyamoto T, Matsui Y, Yada H, Uemura H, Matsuzaki H, Uemura T, Takeya J, Okamoto H. Relaxation dynamics of photoexcited excitons in rubrene single crystals using femtosecond absorption spectroscopy. Phys Rev Lett 2012; 109:097403. [PMID: 23002882 DOI: 10.1103/physrevlett.109.097403] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Revised: 04/06/2012] [Indexed: 06/01/2023]
Abstract
The relaxation dynamics of an exciton in rubrene was investigated by femtosecond absorption spectroscopy. Exciton relaxation to a self-trapped state occurs via the coherent oscillation with 78 cm(-1) due to a coupled mode of molecular deformations with phenyl-side-group motions and molecular displacements. From the temperature dependence of the decay time of excitons, the energy necessary for an exciton to escape from a self-trapped state is evaluated to be ~35 meV (~400 K). As a result, a self-trapped exciton is stable at low temperatures. At room temperature, excitons can escape from a self-trapped state and, subsequently, they are dissociated to charged species. The exciton dissociation mechanism is discussed on the basis of the results.
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Affiliation(s)
- S Tao
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba, Japan
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16
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Shibata T, Horie Y, Hayashi N, Endo S, Musha T, Matsuzaki H. P35-1 Application of neuronal activity topography to vascular cognitive impairment with carotid artery stenosis. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)61271-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Abstract
Pure cultures of the spirochætal causative agent of the disease known as Weil's disease, or febrile icterus, in Japan, have been obtained by us in a solid, a semisolid, and a fluid medium. The spirochæta thus isolated remains pathogenic for guinea pigs for many generations. Up to the present time we have succeeded through the courtesy of Professor Nagayo, Dr. Konuma, and Dr. Ishihara, in cultivating three different strains. The spirochæta is a facultative anaerobe. The solid and semisolid culture media possess one disadvantage, in that they are opaque on account of the addition of red blood corpuscles; but it is hoped that this drawback may soon be overcome by further studies. We shall report later the results of investigations regarding various questions in immunity as well as further details regarding the biological properties of the spirochæta.
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Affiliation(s)
- T Ito
- Chiba Medical College and the Chiba Hospital, Chiba, Japan
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18
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19
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Asaumi JI, Hisatomi M, Yanagi Y, Unetsubo T, Maki Y, Matsuzaki H, Honda Y, Konouchi H. Evaluation of panoramic radiographs taken at the initial visit at a department of paediatric dentistry. Dentomaxillofac Radiol 2008; 37:340-3. [PMID: 18757719 DOI: 10.1259/dmfr/31214423] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To examine oral and maxillofacial lesions other than those related to the chief complaint in panoramic radiographs taken at the department of paediatric dentistry at our hospital. METHODS We retrospectively reviewed all 1092 patients who had visited the department of paediatric dentistry at our hospital and had a panoramic radiograph taken between August 1999 and October 2004. The following information was obtained from the patients' files and panoramic radiographs: gender, age, chief complaints and the presence or absence of lesions. RESULTS Lesions were observed in 140 of the 1092 panoramic radiographs (12.8%). Among the 140 patients discovered to have lesions in the panoramic radiographs, 66 (47.1%, or 6.05% of the entire group of 1092 patients) had different lesions from those underlying the chief complaint. These 66 patients ages ranged from 3 years to 14 years and the lesions involved 39 (59.1%) missing teeth, 20 (30.3%) mesiodentes, 4 supernumerary teeth, 1 odontoma, 1 radicular cyst and 1 impacted tooth. The missing teeth were observed in the central and lateral incisor, canine, and first and second premolar positions of both jaws, especially in the lower lateral incisor and upper central incisor positions. CONCLUSIONS We were able to detect incidental lesions at a rate of 6.05% (66 of 1092 patients) and at a relatively early age (mean 6.8 years) in the present study. Early treatment of these lesions could avoid maxillofacial deformity and other complications.
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Affiliation(s)
- J-I Asaumi
- Department of Oral and Maxillofacial Radiology, Field of Tumor Biology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
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20
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Iwata Y, Tsuchiya KJ, Mikawa S, Nakamura K, Takai Y, Suda S, Sekine Y, Suzuki K, Kawai M, Sugihara G, Matsuzaki H, Hashimoto K, Tsujii M, Sugiyama T, Takei N, Mori N. Serum levels of P-selectin in men with high-functioning autism. Br J Psychiatry 2008; 193:338-9. [PMID: 18827301 DOI: 10.1192/bjp.bp.107.043497] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [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: 01/14/2023]
Abstract
Immune dysfunction has been proposed as a mechanism for the pathophysiology of autistic-spectrum disorders. The selectin family of adhesion molecules plays a prominent role in immune/inflammatory responses. We determined the serum levels of three types of soluble-form selectin (sP, sL and sE) in 15 men with high-functioning autism and 22 age-matched healthy controls by enzyme-linked immunosorbent assay. Levels of sP-selectin and sL-selectin were significantly lower in patients than in controls. Furthermore, sP-selectin levels were negatively correlated with impaired social development during early childhood.
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Affiliation(s)
- Y Iwata
- Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
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21
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Schmied B, Ulrich A, Matsuzaki H, Batra S, Pour P, Schmied B, Ulrich A, Matsuzaki H, Ding X, Adrian T, Ricordi C, Moyer M. Maintenance of human islets in long term culture. Differentiation 2008. [DOI: 10.1111/j.1432-0436.2000.660403.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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22
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Yamashita SI, Masuda Y, Yoshida N, Matsuzaki H, Kurizaki T, Haga Y, Ikei S, Miyawaki M, Kawano Y, Chujyo M, Kawahara K. p53AIP1 expression can be a prognostic marker in non-small cell lung cancer. Clin Oncol (R Coll Radiol) 2008; 20:148-51. [PMID: 17851056 DOI: 10.1016/j.clon.2007.08.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2006] [Revised: 05/14/2007] [Accepted: 08/07/2007] [Indexed: 12/15/2022]
Abstract
AIMS p53AIP1 is a potential mediator of p53-dependent apoptosis that is mutated in many kinds of carcinoma. To investigate the role of this gene for non-small cell lung cancer, we compared the relationship between p53AIP1 gene expression and clinicopathological status of lung cancer. MATERIALS AND METHODS Seventy samples from non-small cell lung cancer patients were obtained between 1997 and 2003. For quantitative evaluation of RNA expression by polymerase chain reaction (PCR) we used the Taqman PCR methods. Exons 5-8 of the p53 gene were analysed using PCR-single-stranded conformation polymorphism and sequenced for mutation analysis. RESULTS p53AIP1 gene expression levels in the lymph node metastasis-positive group were significantly lower than in the negative group (positive 35.1+/-83.9; negative 64.2+/-113.4; P=0.0486). The overall survival of the p53AIP1 low expression group was significantly worse than that of the p53AIP1 high expression group (P=0.0206). In the multivariate Cox proportional hazard model, p53AIP1 (P=0.0489) was the independent predictor for overall survival. When we investigated mutation analyses of the p53 gene, we could find several point mutations in 15.7% of all samples. However, there was no relationship between p53AIP1 expression and p53 status. CONCLUSIONS These data suggest that the p53AIP1 gene is important for non-small cell lung cancer progression and may be a possible prognostic marker.
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Affiliation(s)
- S-I Yamashita
- Department of Surgery, National Hospital Organization Kumamoto Medical Center, 1-5 Ninomaru, Kumamoto, 860-0008, Japan.
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23
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Aze T, Fujimura M, Matsumura H, Masumoto K, Nakao N, Matsuzaki H, Nagai H, Kawai M. Measurement of the production rates of 36Cl from Cl, K, and Ca in concrete at the 500 MeV neutron irradiation facility at KENS. J Radioanal Nucl Chem 2007. [DOI: 10.1007/s10967-007-0609-z] [Citation(s) in RCA: 2] [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: 11/28/2022]
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24
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Matsuzaki H, Shima K, Muramatsu T, Ro Y, Hashimoto S, Shibahara T, Shimono M. Osteopontin as biomarker in early invasion by squamous cell carcinoma in tongue. J Oral Pathol Med 2007; 36:30-4. [PMID: 17181739 DOI: 10.1111/j.1600-0714.2006.00493.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [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: 11/29/2022]
Abstract
BACKGROUND Osteopontin (OPN) expression in squamous cell carcinoma (SCC) of the tongue has not been clearly elucidated. METHODS We selected 46 cases of tongue SCC and investigated the expression of OPN by immunohistochemical staining. The immunopositive reaction and score for each case were semiquantitatively evaluated. RESULTS Scores were significantly higher in carcinoma nests than in neighboring normal epithelium or epithelial dysplasia. The OPN was expressed clearly in the cytoplasm of carcinoma cells. In cases of early invasive carcinoma, in particular, expression of OPN showed a remarkable increase at the invasion front compared with the non-invaded regions. However, there was no significant correlation between expression of OPN in the primary tumor nest and lymphatic metastasis, recurrence, or survival rate. CONCLUSION This suggests that OPN is a useful biomarker of early invasion by SCC in tongue.
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Affiliation(s)
- H Matsuzaki
- Department of Pathology, Tokyo Dental College, Chiba, Japan
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25
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Okamoto H, Matsuzaki H, Wakabayashi T, Takahashi Y, Hasegawa T. Photoinduced metallic state mediated by spin-charge separation in a one-dimensional organic Mott insulator. Phys Rev Lett 2007; 98:037401. [PMID: 17358723 DOI: 10.1103/physrevlett.98.037401] [Citation(s) in RCA: 11] [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: 08/07/2006] [Indexed: 05/14/2023]
Abstract
Charge dynamics in a one-dimensional (1D) Mott insulator was investigated by fs pump-probe reflection spectroscopy on an organic charge-transfer compound, bis(ethylenedithio)tetrathiafulvalene-difluorotetracyanoquinodimethane (ET-F2TCNQ). The analyses of the transient reflectivity changes demonstrate that low-energy spectral weight induced by photocarrier doping is concentrated on a Drude component being independent of the doping density, and midgap state is never formed. Such phenomena can be explained by the concept of spin-charge separation characteristic of 1D correlated electron systems.
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Affiliation(s)
- H Okamoto
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, 277-8561, Japan
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26
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Matsuzaki H, Katsumata S, Uehara M, Miwa M, Suzuki K. Onset of nephrocalcinosis depends on dietary phosphorus concentration in male rats fed a magnesium-deficient diet. Magnes Res 2006; 19:255-60. [PMID: 17402293] [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: 05/14/2023]
Abstract
Although a magnesium (Mg)-deficient diet is generally known to induce nephrocalcinosis, our previous study observed that despite the administration of a Mg-deficient diet, the kidney calcium (Ca) and phosphorus (P) concentrations were not increased in male rats. We speculated that this result was due to the P concentration of the experimental diet based on the AIN-93G formula used in the previous study. In the present study, male rats were fed modified AIN-93G diets containing the two different Mg concentrations [0.5 g per kg diet (normal-Mg) or Mg-free (Mg-deficient)] and three different P concentrations [3 (3-P), 5 (5-P) or 7 (7-P) g per kg diet]. By histological examination of the kidney, nephrocalcinosis was not observed in rats fed on the Mg-deficient diet containing 3-P While nephrocalcinosis appeared in rats fed on the Mg-deficient diet containing 5-P and 7-P The degree of nephrocalcinosis was severe in rats fed on the Mg-deficient diet containing 7-P compared with rats fed on the Mg-deficient diet containing 5-P These results demonstrated that the Mg-deficient diet based on AIN-93G formula dose not induce nephrocalcinosis and that the Mg-deficient diet based on AIN-93G formula with increased dietary P concentrations induces nephrocalcinosis in male rats. We suggest that the onset of nephrocalcinosis could depend on the dietary P concentration in male rats fed on a Mg-deficient diet.
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Affiliation(s)
- H Matsuzaki
- Department of Nutrition, Junior College of Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan.
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Abstract
The present study is aimed to clarify the postoperative outcome of endoscopic carpal tunnel release in elderly patients with carpal tunnel syndrome. Endoscopic carpal tunnel release was performed on 37 hands of 27 patients (2 men, 25 women) who were aged 70 years or older and clinically and electrophysiologically diagnosed with carpal tunnel syndrome. Mean age at the time of surgery was 74.5 years (range: 70-85 years). Mean postoperative follow-up was 35.5 months (range: 12-114 months). Pain was present preoperatively in 20 hands, but quickly resolved postoperatively in all cases. Numbness completely disappeared in 13 of 37 hands (35.1%), but some degree of numbness remained in the remaining cases. Preoperative severity of thenar muscle atrophy was none in 4 hands, mild in 7 hands, moderate in 12 hands and severe in 14 hands. Postoperative severity of thenar muscle atrophy at final follow-up was none in 13 hands, mild in 16 hands, moderate in 2 hands and severe in 6 hands, confirming that thenar muscle atrophy improves even in elderly patients. However, moderate or severe thenar muscle atrophy remained in 8 hands (21.6%). Endoscopic carpal tunnel release should be considered in the elderly, even though clinical symptoms may not improve substantially in advanced cases.
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Affiliation(s)
- M Nagaoka
- Orthopaedic Department, Surugadai Nihon University Hospital, Tokyo, Japan.
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28
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Ida T, Matsuzaki H, Morita E, Sakashita H, Harada T, Ogata H, Kimura Y, Miki M, Kitano M, Izumi M. Pulsed Field Waveforms for Magnetization of HTS Gd-Ba-Cu-O Bulk Magnets. ACTA ACUST UNITED AC 2006. [DOI: 10.1088/1742-6596/43/1/133] [Citation(s) in RCA: 6] [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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Ohashi S, Sakashita G, Ban R, Nagasawa M, Matsuzaki H, Murata Y, Taniguchi H, Shima H, Furukawa K, Urano T. Phospho-regulation of human protein kinase Aurora-A: analysis using anti-phospho-Thr288 monoclonal antibodies. Oncogene 2006; 25:7691-702. [PMID: 16785988 DOI: 10.1038/sj.onc.1209754] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Mammalian Aurora-A is related to a serine/threonine protein kinase that was originally identified by its close homology with Saccharomyces cerevisiae Ipl1p and Drosophila melanogaster aurora that are key regulators in the orchestration of mitotic events. The protein level of Aurora-A, its peak kinase activity during mitosis, and its activation have been attributed to phosphorylation. Here we show that this enzyme is an arginine-directed kinase and define its substrate specificity. We also found that Thr288 within the activation loop is a critical residue for activating phosphorylation events in vitro and that it is spatiotemporally restricted to a brief window at mitosis on duplicated centrosomes and on spindle microtubules proximal to the poles in vivo. Immunodepletion assays indicated that an upstream kinase(s) of Aurora-A might exist in mammalian cells in addition to autophosphorylation. Furthermore, human activated Aurora-A forms complexes with the negative regulator protein serine/threonine phosphatase type 1 (PP1) that was negatively phosphorylated on Thr320. Interestingly, phospho-specific Aurora-A monoclonal antibodies restrain Aurora-A kinase activity in vitro, providing further therapeutic avenues to explore.
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Affiliation(s)
- S Ohashi
- Department of Biochemistry II, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan
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30
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Nemoto T, Matsuzaki H, Uehara M, Suzuki K. Magnesium-deficient diet-induced reduction in protein utilization in rats is reversed by dietary magnesium supplementation. Magnes Res 2006; 19:19-27. [PMID: 16846097] [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: 05/10/2023]
Abstract
We investigated the effect of dietary magnesium (Mg) level on protein utilization in rats. Male Wistar rats were fed a control diet (control group) and a Mg-deficient diet (Mg-deficient group) for 28 days. After 28 days, the diet of half of the Mg-deficient group (recovery group) was changed from the Mg-deficient diet to the control diet for either 7 or 14 days. After 28 days, final body weight, weight gain and food efficiency were significantly decreased due to the Mg-deficient diet. Apparent Mg absorption, Mg retention and serum Mg levels were also significantly decreased due to the Mg-deficient diet. Furthermore, the Mg-deficient group showed a significant increase in urinary nitrogen (N) excretion and significant decreases in N retention and serum albumin level. At day 7 and 14 after changing the Mg-deficient diet to the control diet, apparent Mg absorption, Mg retention and serum Mg levels were significantly increased in the recovery group as compared with those in the Mg-deficient group. However, with regard to final body weight, weight gain and food efficiency, no significant differences were observed between the Mg-deficient group and the recovery group. At day 14 after changing the diet, urinary N excretion was significantly decreased and N retention was significantly increased in the recovery group as compared with the Mg-deficient group. At day 7 and 14 after changing the diet, the serum albumin level was also significantly increased in the recovery group as compared with that in the Mg-deficient group. These results suggest that: 1) the Mg-deficient diet depresses protein utilization; 2) the Mg-deficient diet-induced impairment of protein utilization is reversed by dietary Mg supplementation; and 3) the Mg-deficient diet-induced growth retardation is not completely reversed after 14 days of Mg supplementation.
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Affiliation(s)
- T Nemoto
- Department of Nutritional Science, Faculty of Applied Bioscience, Tokyo University of Agriculture, Tokyo 156-8502, Japan
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31
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Katsumata SI, Matsuzaki H, Tsuboi R, Uehara M, Suzuki K. Moderate magnesium-restricted diet affects bone formation and bone resorption in rats. Magnes Res 2006; 19:12-8. [PMID: 16846096] [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: 05/10/2023]
Abstract
This study investigated the effects of moderate magnesium (Mg)-restricted diet on bone formation and bone resorption in rats. Weanling Wistar strain rats were randomly divided into three dietary groups of 6 rats each and fed their respective diets; a control diet containing 0.05% Mg (C), a half Mg diet containing 0.025% Mg (1/2Mg), or a one-fifth Mg diet containing 0.01% Mg (1/5Mg), for 21 days. Serum osteocalcin level was significantly reduced with decreasing dietary Mg level. Urinary excretion of C-terminal telopeptide of type 1 collagen was significantly higher in the 1/5Mg group than in the C group. Serum insulin-like growth factor-1 (IGF-1) level was significantly lower in the 1/2Mg and 1/5Mg groups than in the C group. Serum soluble receptor activator of nuclear factor-kappaB ligand (sRANKL) level was significantly higher in the 1/2Mg and 1/5Mg groups than in the C group. These results showed that a moderate Mg-restricted diet induced a decrease in bone formation and an increase in bone resorption. Furthermore, these changes of bone formation and bone resorption might be caused by serum IGF-1 and sRANKL levels, respectively.
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Affiliation(s)
- S I Katsumata
- Department of Nutritional Science, Faculty of Applied Bioscience, Tokyo University of Agriculture, Tokyo, Japan
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Okamoto H, Ikegami K, Wakabayashi T, Ishige Y, Togo J, Kishida H, Matsuzaki H. Ultrafast photoinduced melting of a spin-Peierls phase in an organic charge-transfer compound, K-tetracyanoquinodimethane. Phys Rev Lett 2006; 96:037405. [PMID: 16486769 DOI: 10.1103/physrevlett.96.037405] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2005] [Indexed: 05/06/2023]
Abstract
Ultrafast photoinduced phase transition in a spin-Peierls (SP) system of K-tetracyanoquinodimethane (K-TCNQ) was studied by femtosecond (fs) reflection spectroscopy. Photocarriers destabilize the SP phase, resulting in a decrease in molecular dimerization within 400 fs. Such a melting of the SP phase drives three kinds of coherent oscillations. By comparing the oscillations with the Raman bands activated by the dimerization, we show that the oscillation of 20 cm-1 is due to an LO phonon, and it plays an important role for the stabilization of the SP phase.
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Affiliation(s)
- H Okamoto
- Department of Advanced Materials Science, University of Tokyo, Chiba 277-8561, Japan
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Katsumata SI, Matsuzaki H, Uehara M, Suzuki K. Effect of dietary magnesium supplementation on bone loss in rats fed a high phosphorus diet. Magnes Res 2005; 18:91-6. [PMID: 16100846] [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: 05/04/2023]
Abstract
The purpose of this study was to investigate the effect of dietary magnesium (Mg) supplementation on bone loss in rats fed a high phosphorus (P) diet. Weanling Wistar strain rats were randomly divided into four dietary groups of 6 rats each and fed their respective diets; a diet containing 0.3% P and 0.05% Mg (C), a diet containing 1.5% P and 0.05% Mg (HP), a diet containing 0.3% P and 0.15% Mg (HMg), or a diet containing 1.5% P and 0.15% Mg (HPMg), for 21 days. Compared to the C and HMg groups, serum parathyroid hormone (PTH) concentration was significantly higher in the HP and HPMg groups. Serum osteocalcin concentration and urinary excretion of C-terminal telopeptides of type I collagen (CTx), markers of bone turnover, were significantly higher in the HP and HPMg groups than in the C and HMg groups. Dietary Mg supplementation had no significant effects on serum PTH and osteocalcin concentrations, while urinary excretion of CTx was significantly lower in the HPMg group than in the HP group. These results suggested that dietary Mg supplementation suppressed bone resorption due to high P diet.
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Affiliation(s)
- S I Katsumata
- Department of Nutritional Science, Faculty of Applied Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
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Matsuzaki H, Katsumata SI, Uehara M, Suzuki K, Nakamura K. Effects of high calcium intake on bone metabolism in magnesium-deficient rats. Magnes Res 2005; 18:97-102. [PMID: 16100847] [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: 05/04/2023]
Abstract
We examined the effects of high calcium (Ca) intake on bone metabolism in magnesium (Mg)-deficient rats. Male Wistar rats were divided into three groups, with each group having a similar mean body weight, and fed a control diet (control group), a Mg-deficient diet (Mg-deficient group) or a Mg-deficient Ca-supplemented diet (Mg-deficient Ca-supplemented group) for 14 d. Femoral Ca content was significantly lower in the Mg-deficient Ca-supplemented group than in the control group and Mg-deficient group. Femoral Mg content was significantly lower in the Mg-deficient group and Mg-deficient Ca-supplemented group than in the control group. Furthermore, femoral Mg content was significantly lower in the Mg-deficient Ca-supplemented group than in the Mg-deficient group. Serum osteocalcin levels (a biochemical marker of bone formation) were significantly lower in the two Mg-deficient groups than in the control group. As a biochemical marker of bone resorption, urinary deoxypyridinoline excretion was significantly higher in the Mg-deficient Ca-supplemented group than in the control group and Mg-deficient group. The results in the present study suggest that high Ca intake had no preventive effect on alteration of bone metabolism in Mg-deficient rats.
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Affiliation(s)
- H Matsuzaki
- Department of Nutrition, Junior College of Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
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35
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Asaumi JI, Shibata Y, Yanagi Y, Hisatomi M, Matsuzaki H, Konouchi H, Kishi K. Radiographic examination of mesiodens and their associated complications. Dentomaxillofac Radiol 2004; 33:125-7. [PMID: 15314006 DOI: 10.1259/dmfr/68039278] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.7] [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: 11/05/2022] Open
Abstract
OBJECTIVES To examine mesiodens with regard to their status, their influence on adjacent teeth and their alteration during the follow-up period. METHODS From retrospective reviews of all patients who visited our institution from 1990-2001, we identified 200 patients (256 mesiodentes) who were shown to have mesiodentes on the basis of a periapical radiograph, a panoramic radiograph or an axial radiograph. RESULTS The number of supernumerary teeth was one in 146 cases (73%), two in 52 cases (26%) and three in 2 cases (1%). Of 256 mesiodentes, the direction of the crown of the mesiodens was inverted in 172 (67%), in a normal direction in 69 (27%) and in a horizontal direction with regard to the tooth axis in 15 (6%). Of the 147 mesiodentes for which axial radiography was performed, 131 (89%) were located at a palatal site against the dental arch, 16 (11%) overlapped the dental arch and none were at a labial site. Of our 200 cases, a delay of eruption of the permanent central incisor was seen in 12 (6%), malposition or rotation of the central incisor in 5 (2.5%) and dentigerous cyst formation arising from mesiodens in 22 (11%). Marked movement of the mesiodens was seen in 10 cases during the follow-up period of 5-7 years. Some complication arising from mesiodens was seen in 19.5% of all cases in our research. CONCLUSION Although mesiodentes are not caused by malocclusion, they may cause it. A long period of impaction of mesiodentes may bring about dentigerous cyst formation or movement of the mesiodentes.
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Affiliation(s)
- J I Asaumi
- Department of Oral and Maxillofacial Radiology, Field of Tumor Biology, Graduate School of Medicine and Dentistry, Okayama University, Japan.
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Shibata Y, Asaumi J, Yanagi Y, Kawai N, Hisatomi M, Matsuzaki H, Konouchi H, Nagatsuka H, Kishi K. Radiographic examination of dentigerous cysts in the transitional dentition. Dentomaxillofac Radiol 2004; 33:17-20. [PMID: 15140817 DOI: 10.1259/dmfr/24148363] [Citation(s) in RCA: 26] [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: 11/05/2022] Open
Abstract
OBJECTIVES To examine radiographically the relationship between the deciduous tooth and dentigerous cyst of the permanent successor during the transitional dentition. METHODS From a retrospective review of all patients who visited our institution from April 1988 to August 2001, 70 patients under 16 years of age who had histologically confirmed dentigerous cysts that had developed from the central incisor to the second premolar were identified. These 70 patients were investigated using panoramic and periapical radiographs. RESULTS In most cases (54 cases; 77.1%) the cyst was in the premolar region. Of the 54 premolars with dentigerous cysts, the overlying deciduous tooth had already been lost in 7 cases. Of the 47 remaining premolars with associated deciduous tooth, 35 (74.5%) had bone resorption of the periapical or bifurcation region, or irregular resorption of the associated deciduous tooth. Of the remaining 12 deciduous teeth with no periapical lesions, 9 had been treated with root canal therapy. Thus, 44 of these 47 cases (93.6%) had the possibility of inflammation at the deciduous tooth associated with the dentigerous cyst. Evidence from one case in the present study suggesting the process by which cyst development occurs is also given. CONCLUSION Inflammatory change at the apex of the deciduous tooth may bring on a dentigerous cyst of the permanent successor.
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Affiliation(s)
- Y Shibata
- Department of Oral and Maxillofacial Radiology, Field of Tumor Biology, Graduate School of Medicine and Dentistry, Okayama University, Japan
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Oshima Y, Araki H, Matsuzaki H. Chromosome engineering in yeast with a site-specific recombination system from a heterologous yeast plasmid. Methods Mol Biol 2003; 53:217-25. [PMID: 8924983 DOI: 10.1385/0-89603-319-8:217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Y Oshima
- Department of Biotechnology, Osaka University, Japan
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Iwai S, Ono M, Maeda A, Matsuzaki H, Kishida H, Okamoto H, Tokura Y. Ultrafast optical switching to a metallic state by photoinduced mott transition in a halogen-bridged nickel-chain compound. Phys Rev Lett 2003; 91:057401. [PMID: 12906630 DOI: 10.1103/physrevlett.91.057401] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2002] [Indexed: 05/24/2023]
Abstract
We demonstrate the ultrafast photoinduced Mott transition from a charge transfer insulator to a metal in a halogen-bridged Ni-chain compound by pump-probe reflection spectroscopy. Upon the irradiation of a 130-femtosecond laser pulse, the spectral weight of the gap transition is transferred to the inner-gap region. When the photoexcitation density exceeds 0.1/Ni site, the Drude-like high-reflection band appears in the infrared region, signaling the formation of a metallic state. The photogeneration of the metallic state and the subsequent recovery to the original gapped state occur within a few picoseconds.
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Affiliation(s)
- S Iwai
- Correlated Electron Research Center (CERC), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8564, Japan
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Matsuzaki H, Fujita W, Awaga K, Okamoto H. Photoinduced phase transition in an organic radical crystal with room-temperature optical and magnetic bistability. Phys Rev Lett 2003; 91:017403. [PMID: 12906574 DOI: 10.1103/physrevlett.91.017403] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2003] [Indexed: 05/24/2023]
Abstract
A phase control by photoirradiation is successfully achieved in a spin-Peierls system of the organic radical crystal, 1,3,5-trithia-2,4,6-triazapentalenyl (TTTA), which exhibits optical and magnetic bistability around room temperature with a large hysteresis loop. A nanosecond laser pulse is found to induce a transition from a diamagnetic low-temperature phase to a paramagnetic high-temperature phase both inside (296 K) and outside (11 K) the hysteresis loop. Comparison of the excitation energy dependence between transition efficiency and photoconductivity suggests that the photoinduced transition is driven by suppression of the spin-Peierls instability by the accumulation of photocarriers.
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Affiliation(s)
- H Matsuzaki
- Department of Advanced Materials Science, University of Tokyo, Kashiwa-shi, Chiba 277-8561, Japan
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Hisatomi M, Asaumi J, Konouchi H, Yanagi Y, Matsuzaki H, Kishi K. Comparison of radiographic and MRI features of a root-diverging odontogenic myxoma, with discussion of the differential diagnosis of lesions likely to move roots. Oral Dis 2003; 9:152-7. [PMID: 12945597 DOI: 10.1034/j.1601-0825.2003.01802.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [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: 11/23/2022]
Abstract
Lesions that can produce divergence of the roots of teeth in the mandible include odontogenic cysts (odontogenic keratocysts, lateral periodontal cysts and radicular cysts), ameloblastomas, odontogenic myxomas, central giant cell granulomas, adenomatoid odontogenic tumors and aneurismal bone cysts, and other tumors. Moreover most benign jaw lesions can do this occasionally. However, when lesions--which show interradicular tear-shaped radiolucencies--are small it is often difficult to interpret them radiographically, because they do not show characteristic radiographic features. We describe a comparison of radiographic and magnetic resonance (MR) features of a root-diverging odontogenic myxoma, with discussion of the differential diagnosis of lesions likely to move roots. In addition, we discuss radiographic and MR features of possible lesions, which show similar radiographic findings to odontogenic myxoma.
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Affiliation(s)
- M Hisatomi
- Department of Oral and Maxillofacial Radiology, Field of Tumor Biology, Graduate School of Medicine and Dentistry, Okayama University, Okayama, Japan.
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Matsuzaki H, Matsuoka T, Kishida H, Takizawa K, Miyasaka H, Sugiura K, Yamashita M, Okamoto H. Novel optical and magnetic bistability and photoinduced transition in a one-dimensional halogen-bridged binuclear pt complex. Phys Rev Lett 2003; 90:046401. [PMID: 12570439 DOI: 10.1103/physrevlett.90.046401] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2002] [Indexed: 05/24/2023]
Abstract
In iodine-bridged binuclear Pt compounds, R(4)[Pt(2)(pop)(4)I]nH(2)O and R(')(2)[Pt(2)(pop)(4)I]nH(2)O (pop=P(2)O5H2-2), electronic structures on the PtPtI chains have been controlled between a diamagnetic charge-density-wave (CDW) state and a paramagnetic charge-polarization (CP) state by modification of the counterions (R, R') located between chains. In the R=(C2H5)2NH+2 compound, a pressure-induced CP to CDW transition with a drastic color change is identified. This transition is accompanied by a large hysteresis loop within which photoinduced transition between CDW and CP can be driven by selecting the excitation photon energy.
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Affiliation(s)
- H Matsuzaki
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba, 277-8561, Japan
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Gladden MH, Matsuzaki H. Static gamma-motoneurones couple group Ia and II afferents of single muscle spindles in anaesthetised and decerebrate cats. J Physiol 2002; 543:273-88. [PMID: 12181298 PMCID: PMC2290485 DOI: 10.1113/jphysiol.2001.013229] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2001] [Accepted: 05/27/2002] [Indexed: 11/08/2022] Open
Abstract
Ideas about the functions of static gamma-motoneurones are based on the responses of primary and secondary endings to electrical stimulation of single static gamma-axons, usually at high frequencies. We compared these effects with the actions of spontaneously active gamma-motoneurones. In anaesthetised cats, afferents and efferents were recorded in intramuscular nerve branches to single muscle spindles. The occurrence of gamma-spikes, identified by a spike shape recognition system, was linked to video-taped contractions of type-identified intrafusal fibres in the dissected muscle spindles. When some static gamma-motoneurones were active at low frequency (< 15 Hz) they coupled the firing of group Ia and II afferents. Activity of other static gamma-motoneurones which tensed the intrafusal fibres appeared to enhance this effect. Under these conditions the secondary ending responded at shorter latency than the primary ending. In another series of experiments on decerebrate cats, responses of primary and secondary endings of single muscle spindles to activation of gamma-motoneurones by natural stimuli were compared with their responses to electrical stimulation of single gamma-axons supplying the same spindle. Electrical stimulation mimicked the natural actions of gamma-motoneurones on either the primary or the secondary ending, but not on both together. However, gamma-activity evoked by natural stimuli coupled the firing of afferents with the muscle at constant length, and also when it was stretched. Analysis showed that the timing and tightness of this coupling determined the degree of summation of excitatory postsynaptic potentials (EPSPs) evoked by each afferent in alpha-motoneurones and interneurones contacted by terminals of both endings, and thus the degree of facilitation of reflex actions of group II afferents.
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Affiliation(s)
- M H Gladden
- Institute of Biomedical and Life Sciences, Glasgow University, Glasgow G12 8QQ, Scotland, UK.
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Yamashita M, Yokoyama K, Furukawa S, Manabe T, Ono T, Nakata K, Kachi-Terajima C, Iwahori F, Ishii T, Miyasaka H, Sugiura K, Matsuzaki H, Kishida H, Okamoto H, Tanaka H, Hasegawa Y, Marumoto K, Ito H, Kuroda S. Tuning of electronic structures of quasi-one-dimensional bromo-bridged Ni(III) complexes with strong electron-correlation by doping of Co(III) ions, [Ni(1-x)Co(x)(Chxn)(2)Br]Br(2). Inorg Chem 2002; 41:1998-2000. [PMID: 11952350 DOI: 10.1021/ic011326r] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have succeeded in synthesizing the Ni(III) complexes doped by Co(III) ions, [Ni(1-x)Co(x)(chxn)(2)Br]Br(2) (x = 0, 0.043, 0.093, and 0.118) by using an electrochemical oxidation method. The single-crystal reflectance spectrum of x = 0.118 shows an intense CT band about 0.5 eV, which is lower than that of [Ni(chxn)(2)Br]Br(2) (1.3 eV). The single-crystal electrical conductivities at room temperature of these compounds increase with increase of the amounts of doping of Co(III) ions. In the ESR spectra, peak-to-peak line widths DeltaH(pp) at room temperature change about 600 G in [Ni(chxn)(2)Br]Br(2) to 200 G in x = 0.118. Such a large x dependence of DeltaH(pp) seems to be ascribed to the increasing contribution from the increasing Curie spins which have smaller line width. Therefore, we have tuned the electronic structures of quasi-one-dimensional bromo-bridged Ni(III) complexes with strong electron correlations by doping of Co(III) ions.
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Affiliation(s)
- M Yamashita
- Graduate School of Science, Tokyo Metropolitan University and PRESTO (JST), 1-1 Minamiohsawa, Hachioji, Tokyo 192-0397, Japan.
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Matsuzaki H. MR imaging in the assessment of a solitary bone cyst. Eur J Radiol 2002. [DOI: 10.1016/s0720-048x(02)00070-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hatta M, Daitoku H, Matsuzaki H, Deyama Y, Yoshimura Y, Suzuki K, Matsumoto A, Fukamizu A. Regulation of alkaline phosphatase promoter activity by forkhead transcription factor FKHR. Int J Mol Med 2002. [DOI: 10.3892/ijmm.9.2.147] [Citation(s) in RCA: 2] [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: 11/06/2022] Open
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Hashimoto S, Narita S, Kasahara H, Shirai K, Kobayashi T, Takanishi A, Sugano S, Yamaguchi J, Sawada H, Takanobu H, Shibuya K, Morita T, Kurata T, Onoe N, Ouchi K, Noguchi T, Niwa Y, Nagayama S, Tabayashi H, Matsui I, Obata M, Matsuzaki H, Murasugi A, Kobayashi T, Haruyama S, Okada T, Hidaki Y, Taguchi Y, Hoashi K, Morikawa E, Iwano Y, Araki D, Suzuki J, Yokoyama M, Dawa I, Nishino D, Inoue S, Hirano T, Soga E, Gen S, Yanada T, Kato K, Sakamoto S, Ishii Y, Matsuo S, Yamamoto Y, Sato K, Hagiwara T, Ueda T, Honda N, Hashimoto K, Hanamoto T, Kayaba S, Kojima T, Iwata H, Kubodera H, Matsuki R, Nakajima T, Nitto K, Yamamoto D, Kamizaki Y, Nagaike S, Kunitake Y, Morita S. Auton Robots 2002; 12:25-38. [DOI: 10.1023/a:1013202723953] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Fukunaga M, Oka M, Ichihashi M, Yamamoto T, Matsuzaki H, Kikkawa U. UV-induced tyrosine phosphorylation of PKC delta and promotion of apoptosis in the HaCaT cell line. Biochem Biophys Res Commun 2001; 289:573-9. [PMID: 11716513 DOI: 10.1006/bbrc.2001.6025] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [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: 01/30/2023]
Abstract
Protein kinase C delta (PKC delta) is activated through tyrosine phosphorylation and is involved in apoptosis induction in the H(2)O(2)-treated fibroblasts. In the human keratinocyte HaCaT cell line, ultraviolet radiation, which induces apoptosis, promoted tyrosine phosphorylation and activation of PKC delta, but neither enhanced threonine phosphorylation in the activation loop nor generated the catalytic fragment of the PKC isoform. Tyrosine phosphorylation of PKC delta was prevented by a radical scavenger, N-acetyl-l-cysteine, and by a tyrosine kinase inhibitor, genistein, in the ultraviolet-irradiated keratinocyte cell line. Ultraviolet radiation-induced apoptosis was attenuated by N-acetyl-l-cysteine and genistein as well as by a PKC inhibitor, bisindolylmaleimide I. These results indicate that reactive oxygen species generated by ultraviolet radiation enhance tyrosine phosphorylation of PKC delta, and the PKC isoform thus activated by the modification reaction contributes to induction of apoptotic cell death in keratinocytes.
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Affiliation(s)
- M Fukunaga
- Biosignal Research Center, Kobe University, Kobe 657-8501, Japan
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Abstract
STUDY DESIGN A retrospective clinical review of patients with thoracolumbar junction disc herniation. OBJECTIVES To evaluate the clinical features of thoracolumbar junction disc herniation and to prepare a chart for the level diagnosis in the neurologic findings and symptoms. SUMMARY OF BACKGROUND DATA Thoracolumbar junction disc herniations show a variety of signs and symptoms because of the complexity of the upper and lower neurons of the spinal cord, cauda equina, and nerve roots. Furthermore, much is still unknown about thoracolumbar junction disc herniations because of their rare frequency. METHODS The clinical features of 26 patients who had undergone operations for single disc herniations at T10-T11 through L2-L3 were investigated. Affected levels were as follows: 2 patients with disc herniation at T10-T11 disc, 4 patients at T11-T12, 3 patients at T12-L1, 6 patients at L1-L2, and 11 patients at L2-L3. The level of disc space of interest was confirmed with whole-spine plain roentgenograms. The caudal end of the cord was judged by magnetic resonance imaging and computed tomographic myelogram. RESULTS Two patients with T10-T11 disc herniation showed moderate lower extremity weakness, increased patellar tendon reflex, and sensory disturbance of the entire lower extremities. Three of four patients with T11-T12 disc herniation experienced lower extremity weakness, and three patients had accentuated patellar tendon reflex. Sensory disturbance was observed in the anterolateral aspect of the thigh in one patient and on the entire leg in three patients. Bowel and bladder dysfunction was noted in three patients. In the T12-L1 disc herniation group (n = 3), muscle weakness and atrophy below the leg were advanced, and bowel and bladder dysfunction were also noted. Two of these three patients had bilateral drop foot, and one patient had unilateral drop foot; sensory disturbance was noted in the sole or foot and around the circumference of the anus, and the patellar tendon reflex and Achilles tendon reflex were absent. All six patients with L1-L2 disc herniation showed severe thigh pain and sensory disturbance at the anterior aspect or lateral aspect of the thigh. On the other hand, there were no clear signs of lower extremity weakness, muscle atrophy, deep tendon reflex, or bowel and bladder dysfunction in these patients. In the L2-L3 disc herniation group (n = 11), all patients had severe thigh pain and sensory disturbance of the anterior aspect or the lateral aspect of the thigh. Weakness in the quadriceps was noted in five patients and weakness in the tibialis anterior in two patients. Decreased or absence of patellar tendon reflex was observed in nine patients. Five patients had positive straight leg raising test results, and eight patients showed positive femoral nerve stretch test results. CONCLUSION Among thoracolumbar junction disc herniations, T10-T11 and T11-T12 disc herniations were considered upper neuron disorders, T12-L1 disc herniations were considered lower neuron disorders, L1-L2 disc herniations were considered mild disorders of the cauda equina and radiculopathy, and L2-L3 disc herniations were considered radiculopathy. These findings had relatively distinct differences among herniated disc levels.
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Affiliation(s)
- Y Tokuhashi
- Department of Orthopaedic Surgery, Surugadai Nihon University Hospital, Tokyo, Japan.
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Abstract
We describe the magnetic resonance (MR) features of two cases of nasopalatine duct cyst (NPDC), including the first presentation of T1-weighted images (WI). The signal intensity of the cases of NPDC showed homogeneous high signal intensity on both on T1 and T2WI, although most cysts of maxillofacial regions demonstrate low to intermediate signal intensity on T1WI. NPDC may commonly be of high signal intensity on T1WI, which is consistent with keratin and viscous fluids.
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Affiliation(s)
- M Hisatomi
- Department of Oral Radiology, Okayama University Dental School, 2-5-1 Shikata-cho, Okayama 700 8525, Japan.
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Abstract
It has been established that ductal cells or precursor cells within the ductal tree of the pancreas can differentiate into islet cells. Although islet cells can also form exocrine cells, it is unclear whether they arise from precursor (stem) cells or from mature endocrine cells by transdifferentiation. Using a defined culture medium and technique for islet purification, for the first time we were able to maintain human islets in culture for more than a year. Multilabeling immunohistochemical and immunoelectron microscopic examination of the islets at different days of culture using islet cell markers (antibodies to hormones, neuron-specific enolase, chromogranin A) and ductal cell markers (cytokeratins 7 and 19, carbonic anhydrase II, DU-PAN2, CA 19-9, and MUC1) revealed that endocrine cells gradually transdifferentiate to ductal, acinar, and intermediary cells. Although islet hormone secretion ceased after day 28 in culture, endocrine cells were still detectable at day 60. However, later, all endocrine and exocrine cells were replaced by undifferentiated cells that expressed neuron-specific enolase, chromogranin A, laminin, vimentin, cytokeratin 7 and 19, alpha-1-antitrypsin, transforming growth factor-alpha, and epidermal growth factor receptor. Our data thus show that, under proper conditions, human islets can be maintained in vitro over a long period and that, in the culture condition, islet cells seem to transdifferentiate to exocrine cells and undifferentiated cells, which may be considered pancreatic precursor (stem) cells.
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Affiliation(s)
- B M Schmied
- Eppley Cancer Center, University of Nebraska Medical Center, Omaha 68198-6805, USA
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