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Nisbet AGA, Cain MG, Hase T, Finkel P. Robust phase determination in complex solid solutions using diffuse multiple scattering. J Appl Crystallogr 2023; 56:1046-1050. [PMID: 37555228 PMCID: PMC10405585 DOI: 10.1107/s1600576723004120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 05/10/2023] [Indexed: 08/10/2023] Open
Abstract
A novel methodology is presented for identifying and distinguishing between structural phases in multi-phasic systems, such as piezoelectric materials like PMN-PT [Pb(Mg1/3Nb2/3)O3-PbTiO3], PIN-PMN-PT [Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3] and PZT [Pb(Zr,Ti)O3], using diffuse multiple scattering and Kossel line diffraction techniques. The method exploits the splitting of triple line intersections from special coplanar reflections combined with logical constraints to generate a splitting fingerprint for robust crystallographic phase determination and discrimination.
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Affiliation(s)
- A. G. A. Nisbet
- Diamond Light Source, Harwell Science & Innovation Campus, Harwell OX11 0DE, United Kingdom
| | - M. G. Cain
- Electrosciences Ltd, Farnham, Surrey GU9 9QT, United Kingdom
| | - T. Hase
- University of Warwick, Coventry CV4 7AL, United Kingdom
| | - P. Finkel
- US Naval Research Laboratory, Washington, District of Columbia 20375, USA
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Hase T, Fujiwara Y, Makihara R, Hashimoto N, Tsubata Y, Okuno T, Naito T, Takahashi T, Kobayashi H, Shinno Y, Ikeda T, Goto K, Hosomi Y, Watanabe K, Kitazono S, Sakiyama N, Makino Y, Yamamoto N. 1249P Pharmacokinetic and dose finding study of osimertinib in patients with impaired renal function and low body weight. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Tamiya Y, Morise M, Matsuzawa R, Tanaka I, Okada T, Iwano S, Hase T, Hashimoto N, Sato M, Itoh Y, Hasegawa Y. P2.18-18 Impact of Combined Evaluation Using Tumor Volume and Metastatic Nodal Extent in Stage III NSCLC Treated with CRT. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1972] [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: 10/25/2022]
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Ozawa N, Hase T, Hatta T, Sagara A, Ichikawa K, Miyazaki M, Ando M, Yamada K, Hasegawa Y. Retrospective analysis of risk factor of injection site reaction induced by infusion of cisplatin plus vinorelbine. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy442.006] [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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Yogo N, Hase T, Kasama T, Hatta T, OZAWA N, Sato M, Kaji N, Tokeshi M, Baba Y, Hasegawa Y. Development of the immuno-wall device for rapid detection of ALK and ROS1 fusions in lung cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy441.027] [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: 11/15/2022] Open
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Wiegand K, Winkler M, Rumpel S, Kannchen D, Rexroth S, Hase T, Farès C, Happe T, Lubitz W, Rögner M. Rational redesign of the ferredoxin-NADP +-oxido-reductase/ferredoxin-interaction for photosynthesis-dependent H 2-production. Biochim Biophys Acta Bioenerg 2018; 1859:253-262. [PMID: 29378161 DOI: 10.1016/j.bbabio.2018.01.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [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: 09/05/2017] [Revised: 01/18/2018] [Accepted: 01/22/2018] [Indexed: 01/11/2023]
Abstract
Utilization of electrons from the photosynthetic water splitting reaction for the generation of biofuels, commodities as well as application in biotransformations requires a partial rerouting of the photosynthetic electron transport chain. Due to its rather negative redox potential and its bifurcational function, ferredoxin at the acceptor side of Photosystem 1 is one of the focal points for such an engineering. With hydrogen production as model system, we show here the impact and potential of redox partner design involving ferredoxin (Fd), ferredoxin-oxido-reductase (FNR) and [FeFe]‑hydrogenase HydA1 on electron transport in a future cyanobacterial design cell of Synechocystis PCC 6803. X-ray-structure-based rational design and the allocation of specific interaction residues by NMR-analysis led to the construction of Fd- and FNR-mutants, which in appropriate combination enabled an about 18-fold enhanced electron flow from Fd to HydA1 (in competition with equimolar amounts of FNR) in in vitro assays. The negative impact of these mutations on the Fd-FNR electron transport which indirectly facilitates H2 production (with a contribution of ≤42% by FNR variants and ≤23% by Fd-variants) and the direct positive impact on the Fd-HydA1 electron transport (≤23% by Fd-mutants) provide an excellent basis for the construction of a hydrogen-producing design cell and the study of photosynthetic efficiency-optimization with cyanobacteria.
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Affiliation(s)
- K Wiegand
- Plant Biochemistry, Faculty of Biology & Biotechnology, Ruhr University Bochum, 44780 Bochum, Germany
| | - M Winkler
- Photobiotechnology, Faculty of Biology & Biotechnology, Ruhr University Bochum, 44780 Bochum, Germany
| | - S Rumpel
- Max-Planck-Institut für Chemische Energiekonversion, 45470 Mülheim, Germany
| | - D Kannchen
- Plant Biochemistry, Faculty of Biology & Biotechnology, Ruhr University Bochum, 44780 Bochum, Germany
| | - S Rexroth
- Plant Biochemistry, Faculty of Biology & Biotechnology, Ruhr University Bochum, 44780 Bochum, Germany
| | - T Hase
- Institute for Protein Research, Osaka University, Suita 565-0871, Osaka, Japan
| | - C Farès
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim, Germany
| | - T Happe
- Photobiotechnology, Faculty of Biology & Biotechnology, Ruhr University Bochum, 44780 Bochum, Germany
| | - W Lubitz
- Max-Planck-Institut für Chemische Energiekonversion, 45470 Mülheim, Germany
| | - M Rögner
- Plant Biochemistry, Faculty of Biology & Biotechnology, Ruhr University Bochum, 44780 Bochum, Germany.
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Yogo N, Hase T, Kasama T, Ozawa N, Sato M, Kaji N, Tokeshi M, Baba Y, Hasegawa Y. Development of the immuno-wall device for rapid, low-cost detection of EGFR mutations in tumor samples from patients with lung cancer. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx672.004] [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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8
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Sato M, Kakumu T, Goto D, Kato T, Yogo N, Hase T, Morise M, Fukui T, Yokoi K, Sekido Y, Girard L, Minna J, Byers L, Heymach J, Coombes K, Kondo M, Hasegawa Y. P3.03-013 Identification of Proteosomal Catalytic Subunit PSMA6 as a Therapeutic Target for Lung Cancer through a Pooled shRNA Screen. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Hase T, Takeuchi S, Ando M, Hata A, Kenmotsu H, Fujiwara T, Shimizu S, Nagase K, Yoshimura K, Katakami N, Takahashi T, Hasegawa Y, Yano S. Phase I study of combined therapy with vorinostat and gefitinib to treat BIM deletion polymorphism-associated resistance in EGFR-mutant lung cancer (VICTROY-J). Ann Oncol 2017. [DOI: 10.1093/annonc/mdx671.036] [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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Shibasaki S, Takahashi N, Toi H, Tsuda I, Nakamura T, Hase T, Minagawa N, Homma S, Kawamura H, Taketomi A. Percutaneous transhepatic gallbladder drainage followed by elective laparoscopic cholecystectomy in patients with moderate acute cholecystitis under antithrombotic therapy. J Hepatobiliary Pancreat Sci 2013; 21:335-42. [PMID: 24027011 DOI: 10.1002/jhbp.28] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND Standard treatment for acute cholecystitis (AC) in patients receiving antithrombotic drugs has not been established. We evaluated the safety of percutaneous transhepatic gallbladder drainage (PTGBD) followed by elective laparoscopic cholecystectomy (LC) in patients with moderate AC who were receiving antithrombotics. METHODS Seventy-five patients received PTGBD from January 2006 to March 2013 followed by elective LC for moderate AC. Patients were divided into Group A, which consisted of patients receiving antithrombotic therapy (n = 23), and Group B, which included the remaining patients (n = 52). We analyzed clinical outcomes and perioperative complications between groups. RESULTS No hemorrhagic events occurred during PTGBD insertion regardless of antithrombotic treatment. The open conversion rate was not significantly different between the two groups. Postoperative complications were found in 10 patients (13.3%). The rate of postoperative complications in Group A was slightly higher than that in Group B, but the difference was not significant (21.7% vs. 9.6%; P = 0.15). Complications associated with PTGBD occurred in six patients (8%). There were no significant differences in the incidence of these complications, operation time, intraoperative blood loss, or length of postoperative hospital stay. CONCLUSIONS Percutaneous transhepatic gallbladder drainage followed by elective LC may be an effective therapeutic strategy for moderate AC in patients receiving antithrombotic therapy.
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Affiliation(s)
- Susumu Shibasaki
- Department of Surgery, Hokushinkai Megumino Hospital, Eniwa, Hokkaido, Japan; Department of Gastroenterological Surgery I, Graduate School of Medicine, Hokkaido University, N15 W7 Kita-ku, Sapporo, Hokkaido, 060-8638, Japan.
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Morise M, Mizutani T, Oguri T, Imai N, Hase T, Shindo Y, Inukai Y, Ito S, Hashimoto N, Sato M, Kondo M, Hasegawa Y. Prognostic Factors in Recurrent Small-Cell Lung Carcinoma. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32396-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Adamczak M, Koleganova N, Nyengaard JR, Ritz E, Wiecek A, Slabiak Blaz N, Yi Chun DX, Alexandre H, Sandrine GS, Olivier T, Isabelle E, Christophe L, Guy T, Pierre Francois W, Jean-Philippe R, Yvon L, Eric R, Muller-Krebs S, Muller-Krebs S, Weber L, Tsobaneli J, Reiser J, Zeier M, Schwenger V, Tinel C, Samson M, Bonnotte B, Mousson C, Machcinska M, Machcinska M, Bocian K, Wyzgal M, Korczak-Kowalska G, Ju MK, Huh KH, Park KT, Kim SJ, Cho BH, Kim CD, So BJ, Leee S, Kang CM, Joo DJ, Kim YS, Bocian K, Zarzycki M, Sobich A, Korczak-Kowalska G, Matsuyama M, Hase T, Yoshimura R, Koshino K, Sakai K, Suzuki T, Nobori S, Ushigome H, Brikci-Nigassa L, Chargui J, Touraine JL, Yoshimura N, Cantaluppi V, Medica D, Figliolini F, Migliori M, Mannari C, Dellepiane S, Quercia AD, Randone O, Tamagnone M, Messina M, Manzione AM, Ranghino A, Biancone L, Segoloni GP, Camussi G, Turk TR, Zou X, Rauen U, De Groot H, Amann K, Kribben A, Eckardt KU, Bernhardt WM, Witzke O, Lidia G, Wouter C, Yvon L, Eric A, Yann LM, Guy T, Christian N, Marie E, Pierre M, Zineb A, Miriana D, Annick M, Marc A, Daniel A, Wornle M, Ribeiro A, Motamedi N, Grone HJ, Cohen CD, Schlondorff D, Schmid H, Teplan V, Banas M, Banas B, Steege A, Bergler T, Kruger B, Schnulle P, Yard B, Kramer BK, Hoger S, Xavier MP, Sampaio-Norton S, Gaiao S, Alves H, Oliveira G, Xavier MP, Sampaio-Norton S, Gaiao S, Alves H, Oliveira G, Xavier MP, Sampaio-Norton S, Gaiao S, Alves H, Oliveira G, Zaza G, Rascio F, Pontrelli P, Granata S, Rugiu C, Grandaliano G, Lupo A, Wohlfahrtova M, Wohlfahrtova M, Brabcova I, Balaz P, Janousek L, Lodererova A, Honsova E, Wohlfahrt P, Viklicky O, Grabner A, Grabner A, Kentrup D, Edemir B, Sirin Y, Pavenstadt H, Schober O, Schlatter E, Schafers M, Schnockel U, Reuter S, Rascio F, Pontrelli P, Accetturo M, Gigante M, Gigante M, Tataranni T, Zito A, Schena A, Schena FP, Stallone G, Gesualdo L, Grandaliano G, Maillard N, Masson I, Lena A, Manolie M, Eric A, Christophe M, Lassen CK, Keller AK, Moldrup U, Bibby BM, Jespersen B, Cvetkovic T, Velickovic Radovanovic R, Pavlovic R, Djordjevic V, Vlahovic P, Stefanovic N, Sladojevic N, Ignjatovic A, Rong S, Menne J, Haller H, Suszdak P, Tomczuk P, Gueler F, Nelli S, Sara D, Salma EK, Naoufal M, Tarik M, Mohamed Z, Guislaine M, Mohamed Gharbi B, Benyounes R, Lu X, Rong S, Shushakova N, Menne J, Kirsch T, Haller H, Gueler F, Bockmeyer CL, Bockmeyer CL, Ramackers W, Wittig J, Agustian PA, Klose J, Dammrich ME, Kreipe H, Brocker V, Winkler M, Becker JU, Agustian PA, Bockmeyer CL, Wittig J, Becker JU, Bockmeyer CL. Transplantation - basic. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs247] [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: 11/15/2022] Open
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Toi H, Morita T, Nakamura T, Muranaga S, Hase T. [Splenomegaly Associated with FOLFOX Therapy]. Gan To Kagaku Ryoho 2011; 38:1457-1460. [PMID: 21918341] [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: 05/31/2023]
Abstract
BACKGROUND Oxaliplatin is one of the key drugs for the treatment of colorectal cancer, although it is known to cause hepatic sinusoidal injury. METHOD Thirty-one patients underwent modified FOLFOX6 therapy from April 2006 and December 2009 at our hospital. Four patients were excluded from this study because they had too many intervals in their therapeutic courses. The size of the spleen and the blood platelet count were analyzed before and after 6 months of FOLFOX therapy. The spleen was measured using CT scan, and the splenic index(SI=length×width×height)was evaluated. RESULTS After 6 months of treatment, the mean SI was increased from 229 cm3 to 323 cm3(p<0. 01). At the same time, the mean platelet count was decreased from 26. 9 ×10 / / 4 mm3 to 17. 1×104 mm3(p<0. 01). A negative correlation was found between the ratio of SI and the platelet count after 6 months of treatment to baseline(r=-0. 42, p=0. 030). SI increased by>50% in 12 patients (44. 4%). The platelet count decreased more severely in patients whose SI increased by>50%(p=0. 028). CONCLUSIONS Splenomegaly and thrombocytopenia were observed in patients who underwent FOLFOX therapy. These are candidate parameters for evaluating hepatic sinusoidal injury.
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Kusunoki M, Ozaki T, Nakagawa A, Hase T. Distant residues of maize glutamine synthetase affecting substrate affinity. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311080378] [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: 04/03/2023] Open
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Kubota H, Kimata-Ariga Y, Muraki N, Kurisu G, Hase T. Crystal structure of the engineered cross-linked complex between Fd and FNR. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311079979] [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: 11/10/2022] Open
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Bowsher CG, Eyres LM, Gummadova JO, Hothi P, McLean KJ, Munro AW, Scrutton NS, Hanke GT, Sakakibara Y, Hase T. Identification of N-terminal regions of wheat leaf ferredoxin NADP+ oxidoreductase important for interactions with ferredoxin. Biochemistry 2011; 50:1778-87. [PMID: 21265508 DOI: 10.1021/bi1014562] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Wheat leaves contain two isoproteins of the photosynthetic ferredoxin:NADP(+) reductase (pFNRI and pFNRII). Truncated forms of both enzymes have been detected in vivo, but only pFNRII displays N-terminal length-dependent changes in activity. To investigate the impact of N-terminal truncation on interaction with ferredoxin (Fd), recombinant pFNRII proteins, differing by deletions of up to 25 amino acids, were generated. During purification of the isoproteins found in vivo, the longer forms of pFNRII bound more strongly to a Fd affinity column than did the shorter forms, pFNRII(ISKK) and pFNRII[N-2](KKQD). Further truncation of the N-termini resulted in a pFNRII protein which failed to bind to a Fd column. Similar k(cat) values (104-140 s(-1)) for cytochrome c reduction were measured for all but the most truncated pFNRII[N-5](DEGV), which had a k(cat) of 38 s(-1). Stopped-flow kinetic studies, examining the impact of truncation on electron flow between mutant pFNRII proteins and Fd, showed there was a variation in k(obs) from 76 to 265 s(-1) dependent on the pFNRII partner. To analyze the sites which contribute to Fd binding at the pFNRII N-terminal, three mutants were generated, in which a single or double lysine residue was changed to glutamine within the in vivo N-terminal truncation region. The mutations affected binding of pFNRII to the Fd column. Based on activity measurements, the double lysine residue change resulted in a pFNRII enzyme with decreased Fd affinity. The results highlight the importance of this flexible N-terminal region of the pFNRII protein in binding the Fd partner.
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Affiliation(s)
- C G Bowsher
- Faculty of Life Sciences, The University of Manchester, Michael Smith Building, Manchester M13 9PT, UK.
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Hanke G, Satomi Y, Shinmura K, Takao T, Hase T. A screen for potential ferredoxin electron transfer partners uncovers new, redox dependent interactions. Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics 2011; 1814:366-74. [DOI: 10.1016/j.bbapap.2010.09.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2010] [Revised: 09/13/2010] [Accepted: 09/15/2010] [Indexed: 12/20/2022]
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Takahashi Y, Mitsui A, Hase T, Matsubara H. Formation of the iron-sulfur cluster of ferredoxin in isolated chloroplasts. Proc Natl Acad Sci U S A 2010; 83:2434-7. [PMID: 16593686 PMCID: PMC323312 DOI: 10.1073/pnas.83.8.2434] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The formation of the iron-sulfur cluster of ferredoxin was examined in vitro by incubating isolated chloroplasts with [(35)S]cysteine. The ferredoxin molecule was radioactively labeled in chloroplasts without synthesis of its polypeptide and comigrated with holoferredoxin during polyacrylamide gel electrophoresis under nondenaturing conditions. When the labeled ferredoxin was denatured by the addition of trichloroacetic acid, radioactive acid-labile sulfide in the cluster was released from the polypeptide as a gas and trapped in a 0.1 M NaOH solution. These results indicate that the sulfur atom derived from cysteine was incorporated into ferredoxin through formation of the iron-sulfur cluster. This process was stimulated by light and inhibited by the electron transport inhibitor, dichlorophenyldimethylurea, and the uncouplers, atebrin and gramicidin, but not by the protein synthesis inhibitor, chloramphenicol. These inhibitory effects were reversed by the addition of ATP to the incubation mixture. Formation of the iron-sulfur cluster of ferredoxin in chloroplasts is thus dependent on ATP.
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Affiliation(s)
- Y Takahashi
- Department of Biology, Faculty of Science, Osaka University, Toyonaka, Osaka 560, Japan
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Hase T, Fuchizaki K. Molecular dynamics simulation study on liquid tin tetraiodide. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308080239] [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: 11/10/2022] Open
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Sakagami T, Miyauchi A, Hase T, Fuchizaki K. Equation of state for the low-pressure crystalline phase of tin tetraiodide. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308080240] [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: 11/10/2022] Open
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Kimata-Ariga Y, Saitoh T, Ikegami T, Horii T, Hase T. Molecular Interaction of Ferredoxin and Ferredoxin-NADP+ Reductase from Human Malaria Parasite. J Biochem 2007; 142:715-20. [DOI: 10.1093/jb/mvm184] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Shimotoyodome A, Kobayashi H, Tokimitsu I, Hase T, Inoue T, Matsukubo T, Takaesu Y. Saliva-Promoted Adhesion of Streptococcus mutans MT8148 Associates with Dental Plaque and Caries Experience. Caries Res 2007; 41:212-8. [PMID: 17426402 DOI: 10.1159/000099321] [Citation(s) in RCA: 9] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2006] [Accepted: 10/03/2006] [Indexed: 11/19/2022] Open
Abstract
Colonization of enamel surfaces by Streptococcus mutans is thought to be initiated by the attachment of bacteria to a saliva-derived conditioning film (acquired pellicle). However, the clinical relevance of the contribution of saliva-promoted S. mutans adhesion in biofilm formation has not yet been fully elucidated. The aim of this study was to correlate saliva-promoted S. mutans adhesion with biofilm formation in humans. We correlated all measurements of salivary factors and dental plaque formation in 70 healthy subjects. Dental plaque development after thorough professional teeth cleaning correlated positively with S. mutans adhesion onto saliva-coated hydroxyapatite pellets and the glycoprotein content of either parotid or whole saliva. Saliva-promoted S. mutans adhesion and glycoprotein content were also positively correlated with each other in parotid and whole saliva. By contrast, neither salivary mutans streptococci, Lactobacillus nor Candida correlated with biofilm formation. Parotid saliva-mediated S. mutans adhesion was significantly higher in 12 caries-experienced (CE) subjects than in 9 caries-inexperienced (CI) subjects. Salivary S. mutans adhesion was significantly less (p < 0.01) in the CI group than in the CE group. In conclusion, the present findings suggest the initial S. mutans adhesion, modulated by salivary protein adsorption onto the enamel surface, as a possible correlate of susceptibility to dental plaque and caries.
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Braune S, Deb S, Hase T, Wahala K. Homologation of Estrone or Estradiol. Appending a Carbon Substituent Into the 3-hydroxyestra-1,3,5-triene Skeleton. CURR ORG CHEM 2007. [DOI: 10.2174/138527207780059349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Gummadova JO, Fletcher GJ, Moolna A, Hanke GT, Hase T, Bowsher CG. Expression of multiple forms of ferredoxin NADP+ oxidoreductase in wheat leaves. J Exp Bot 2007; 58:3971-3985. [PMID: 18162629 DOI: 10.1093/jxb/erm252] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In higher plants there are two forms of ferredoxin NADP(+) oxidoreductase (FNR), a photosynthetic pFNR primarily required for the photoreduction of NADP(+), and a heterotrophic hFNR which generates reduced ferredoxin by utilizing electrons from NADPH produced during carbohydrate oxidation. The aim of this study was to investigate the presence of multiple forms of FNR in wheat leaves and the capacity of FNR isoforms to respond to changes in reductant demand through varied expression and N-terminal processing. Two forms of pFNR mRNA (pFNRI and pFNRII) were expressed in a similar pattern along the 12 cm developing primary wheat leaf, with the highest levels observed in plants grown continuously in the dark in the presence (pFNRI) or absence (pFNRII) of nitrate respectively. pFNR protein increased from the leaf base to tip. hFNR mRNA and protein was in the basal part of the leaf in plants grown in the presence of nitrate. FNR activity in plants grown in a light/dark cycle without nitrate was mainly due to pFNR, whilst hFNR contributed significantly in nitrate-fed plants. The potential role of distinct forms of FNR in meeting the changing metabolic capacity and reductant demands along the linear gradient of developing cells of the leaf are discussed. Furthermore, evidence for alternative N-terminal cleavage sites of pFNR acting as a means of discriminating between ferredoxins and the implications of this in providing a more effective flow of electrons through a particular pathway in vivo is considered.
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Affiliation(s)
- J O Gummadova
- Faculty of Life Sciences, The University of Manchester, 3. 614 Stopford Building, Oxford Road, Manchester M13 9PT, UK
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Shimotoyodome A, Kobayashi H, Nakamura J, Tokimitsu I, Hase T, Inoue T, Matsukubo T, Takaesu Y. Reduction of saliva-promoted adhesion of Streptococcus mutans MT8148 and dental biofilm development by tragacanth gum and yeast-derived phosphomannan. Biofouling 2006; 22:261-8. [PMID: 17290870 DOI: 10.1080/08927010600902821] [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] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The aim of this study was to investigate materials which reduce saliva-promoted adhesion of Streptococcus mutans onto enamel surfaces, and their potential in preventing dental biofilm development. The effects of hydroxyapatite (HA) surface pretreatment with hydrophilic polysaccharides on saliva-promoted S. mutans adhesion in vitro and de novo dental biofilm deposition in vivo were examined. Saliva-promoted adhesion of S. mutans MT8148 was significantly reduced by pretreatment of the HA surface with tragacanth gum (TG) and yeast-derived phosphoglycans. Extracellular phosphomannan (PM) from Pichia capsulata NRRL Y-1842 and TG reduced biofilm development on lower incisors in plaque-susceptible rats when administered via drinking water at concentrations of 0.5% and 0.01%, respectively. The inhibitory effect of TG on de novo dental biofilm formation was also demonstrated when administered via mouthwash in humans. It is concluded that TG and yeast-derived PM have the potential for use as anti-adherent agents and are effective in reducing de novo dental biofilm formation.
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Affiliation(s)
- A Shimotoyodome
- Biological Science Laboratories, Kao Corporation, Tokyo, Japan.
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Hase T, Chargui J, Inori F, Yoshimura R, Sembeil R, Nakatani T, Touraine JL. Human interleukin-10 transduced fetal liver stem cells prolong survival of mouse skin and heart allografts. Transplant Proc 2005; 37:287-8. [PMID: 15808621 DOI: 10.1016/j.transproceed.2004.12.162] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Interleukin (IL)-10 regulates immune responses, acting as a suppressive cytokine by inhibiting the synthesis of Th1 cytokines, such as IL-2 and interferon (IFN)-gamma. It also strongly down-regulates major histocompatibility complex (MHC) class II determinants on antigen presenting cells (APC). On the other hand, long-term tolerance is well correlated with the persistence of a peripheral microchimerism. In this study, we investigated the synergistic effect of human IL-10 (huIL-10) and hematopoietic microchimerism for the induction of long-term tolerance. Irradiated Balb/c mice (H-2d) were used as recipients (fetal liver stem cells [FLSC], skin and heart) and C57BL/6 (H-2b) mice were used as donors of FLSC, skin and heart. Recipients were simultaneously transplanted with the heart, the skin and with huIL-10 gene-transduced FLSC. Microchimerism was checked using fluorescent flow cytometry, huIL10 production using enzyme-linked immunosorbent assay (ELISA), and graft survival was evaluated by daily observation. Significant level of huIL10 (up to 900 pg/mL) was detected for more than 2 weeks in the serum of mice that underwent transplantation. Four weeks after the FLSC injection, microchimerism was identified in the recipient lymphoid organs (spleen, thymus, and bone marrow) by the presence of donor cells (H-2b). Finally, in the group of mice treated with huIL-10 gene-transduced FLSC, skin allografts survived for 18.9 +/- 1.8 days compared with 9.5 and 9.6 days in the groups of mice treated with nontransduced FLSC or huIL-10 alone, respectively. The same pattern for heart allograft survival was observed. HuIL-10 transduction of donor hematopoietic stem cells resulted in production of huIL-10, cell engraftment, and chimerism. Although full tolerance was not obtained, specific and highly significant (P < .001) prolongation of the survival of donor heart allografts with (more than 2-fold compared with nontreated groups) was observed. The infiltration of the transplanted heart and its late rejection demonstrate that stem cells transduced with huIL-10 gene induce "prope" tolerance in this model.
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Affiliation(s)
- T Hase
- Clinical Immunology and Transplantation Claude Bernard University, Hopital Edouard Herriot, Lyon, France
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Takahashi Y, Unno H, Hase T, Kusunoki M, Rouhier N, Jacquot JP. Crystal structure of glutaredoxin of CxxC1 type from poplar. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305091257] [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: 11/10/2022] Open
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28
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Saitoh T, Toyota H, Nakayama M, Ikegami T, Kurisu G, Kusunoki M, Hase T. Structural analysis of the interaction between plant sulfite reductase and ferredoxin. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305091026] [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: 11/10/2022] Open
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29
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Unno H, Uchida T, Sugawara H, Kurisu G, Sakakibara H, Hase T, Kusunoki M. Crystal structure analysis of maize glutamine synthetase. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305088707] [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: 11/11/2022] Open
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30
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Nishio T, Kawaguchi S, Yamamoto M, Iseda T, Kawasaki T, Hase T. Tenascin-C regulates proliferation and migration of cultured astrocytes in a scratch wound assay. Neuroscience 2005; 132:87-102. [PMID: 15780469 DOI: 10.1016/j.neuroscience.2004.12.028] [Citation(s) in RCA: 71] [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] [Accepted: 12/03/2004] [Indexed: 11/23/2022]
Abstract
Tenascin-C (TNC), an extracellular matrix glycoprotein, is involved in tissue morphogenesis like embryogenesis, wound healing or tumorigenesis. Astrocytes are known to play major roles in wound healing in the CNS. To elucidate the roles of TNC in wound closure by astrocytes, we have examined the morphological changes of cultured astrocytes in a scratch wound assay and measured the content of soluble TNC released into the medium. We have also localized the expression of TNC mRNA, TNC, glial fibrillary acidic protein (GFAP), vimentin and integrin beta1. After wounding, glial cells rapidly released the largest TNC isoform and proliferated in the border zones. Subsequently, they became polarized with unidirectional processes and finally migrated toward the denuded area. The proliferating border zone cells and pre-migratory cells intensely expressed TNC mRNA, TNC-, vimentin-, GFAP- and integrin beta1-like immunoreactivity, while the migratory cells showed generally reduced expression except the front. Exogenous TNC enhanced cell proliferation and migration, while functional blocking with anti-TNC or anti-integrin beta1 antibody reduced both of them. These results suggest that mechanical injury induces boundary astrocytes to produce and release TNC that promotes cell proliferation and migration via integrin beta1 in an autocrine/paracrine fashion.
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Affiliation(s)
- T Nishio
- Department of Integrative Brain Science, Kyoto University Graduate School of Medicine, Yoshida-Konoe, Sakyo, Kyoto 606-8501, Japan.
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Matsuyama M, Yoshimura R, Hase T, Uchida J, Tsuchida K, Takemoto Y, Kawahito Y, Sano H, Nakatani T. Expression of Peroxisome Proliferator-Activated Receptor-γ in Renal Ischemia-Reperfusion Injury. Transplant Proc 2005; 37:1684-5. [PMID: 15919430 DOI: 10.1016/j.transproceed.2005.02.068] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [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: 11/19/2022]
Abstract
The pathogenesis of ischemia-reperfusion injury is known to involve cytokines and particularly surface adhesion molecules, the expression of which initiates the attachment of inflammatory cells. Peroxisome proliferator-activated receptor (PPAR)-gamma is considered an important immunomodulatory factor as well as a fatty acid regulator. In this study, we researched the expression of PPAR-gamma in renal ischemia-reperfusion injury of the rat. The right kidney was harvested and left renal artery and vein were clamped under laparotomy. The kidney was reperfused after 90 minutes of ischemia, and rats were sacrificed at 0, 1.5, 3, 5, 12, and 24 hours after reperfusion. PPAR-gamma expression was analyzed by immunohistochemical staining using monoclonal antibody. In normal kidney, PPAR-gamma staining was weak on endothelial cells, including mesangial cells. On the other hand, PPAR-gamma staining was weak on interstitial cells and strong on collecting ducts of medulla. From 1.5 to 5 hours after reperfusion, PPAR-gamma staining was strong on endothelial cells, moderate on interstitial cells, and strong on collecting ducts. Twelve hours after reperfusion, PPAR-gamma staining was weak on endothelial cells, moderate on interstitial cells, and strong on collecting ducts. PPAR-gamma is induced on collecting ducts, interstitial cells, and endothelial cells in a rat model having renal ischemia-reperfusion injury.
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Affiliation(s)
- M Matsuyama
- Department of Urology, Osaka City University Graduate School of Medicine, Asahi-machi, Osaka, Japan
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Matsuyama M, Nakatani T, Hase T, Kawahito Y, Sano H, Kawamura M, Yoshimura R. The expression of cyclooxygenases and lipoxygenases in renal ischemia-reperfusion injury. Transplant Proc 2005; 36:1939-42. [PMID: 15518705 DOI: 10.1016/j.transproceed.2004.08.054] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [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: 11/28/2022]
Abstract
Recent studies of ischemia-reperfusion (I/R) injury have focused on the function of neutrophils as well as the actions of inflammatory cytokines. However, few reports address cyclooxygenases (COXs) and lipoxygenases (LOXs). We researched the expression of COXs (COX-1 and COX-2) and LOXs (5-LOX and 12-LOX) in rat renal I/R injury. The right kidney of male Lewis rats was excised, and the left renal artery and vein clamped for a 90-minute ischemia time. Rats were humanely killed at 0, 1.5, 3, 5, and 12 hours after reperfusion. COX and LOX expressions were studied using immunohistostaining. COX-2 and LOX expressions were observed only on endothelial cells of normal kidney. From 1.5 to 5 hours after reperfusion, COX-2 and LOXs expressions gradually intensified on endothelial cells. COX-2 and LOXs expression were most intense on endothelial cells at 5 hours after reperfusion. Twelve hours after reperfusion, necrosis extended throughout the ischemic kidney and nearly all the tubular epithelial cells were destroyed. Thus, at 12 hours after reperfusion, COX-2 and LOXs expressions on endothelial cells became weaker. However, COX-1 expression was not different at every time after reperfusion. COX-2 and LOXs were expressed in a rat model showing renal I/R injury. Several hours after the maximum of COX-2 and LOXs expressions, the maximal renal I/R injury was observed. These results suggest a relationship between COX-2 and LOXs expressions and renal I/R injury.
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Affiliation(s)
- M Matsuyama
- Department of Urology, Osaka City University Graduate School of Medicine, Osaka, Japan.
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Abstract
The pathogenesis of ischemia-reperfusion (I/R) injury is known to involve cytokines and particularly surface adhesion molecules, the expression of which initiates the attachment of inflammatory cells. Cyclooxygenase (COX)-1 and COX-2 catalyze the initial key enzymatic steps in the metabolism of arachidonic acid. COX-1 is constitutively expressed in most tissues, whereas COX-2 is induced in response to proinflamamatory cytokines and stress. In this study we examined the expression of COX-1 and COX-2 in the rat after 90 minutes of warm-I/R injury. Rats were sacrificed at 0, 1.5, 3, 5, 12, and 24 hours after reperfusion. COX-2 expressions were analyzed by immunohistochemical staining, which was graded on a scale of 0 to 4. All results are presented as the mean values +/- SD. Data analyses used analysis of variance. COX-2 expression was most intense on endothelial cells at 3 and 5 hours after reperfusion. From 12 to 24 hours after reperfusion COX-2 expression on endothelial cells gradually became weaker. COX-2 expression scores were significantly higher at 1.5, 3, 5, 12, and 24 hours after reperfusion than at 0 hours. However, there were no differences in COX-1 expression after reperfusion. Several hours after the maximum of COX-2 expression the maximum renal I/R injury was observed. These results suggest a relationship between COX-2 expression and renal I/R injury.
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Affiliation(s)
- M Matsuyama
- Department of Urology, Osaka City University Graduate School of Medicine, Osaka, Japan
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Alam S, Ueki K, Marukawa K, Ohara T, Hase T, Shimada M, Takazakura D, Nakagawa K, Yamamoto E. Expression of BMP-2 and FGF-2 during bone regeneration around different implant materials in the rabbit mandible. Int J Oral Maxillofac Surg 2005. [DOI: 10.1016/s0901-5027(05)81357-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Abstract
In this study, we investigated the expression of cyclooxygenase (COX)-1 and -2 in human testicular cancer (TC) and normal testis (NT) tissues, as well as the effects of COX ligands on viability and proliferation. Tumour specimens were obtained from 72 patients with TC and 20 patients with NT. RT-PCR and immunohistochemical methods were used to determine COX expression. While COX expression was not noted in any of the NT tissues, a marked expression was observed in the TC samples. The extent and intensity of immunoreactive COX-1 and -2 polypeptides in the TC tissues was statistically greater than the expression in the NT tissues. The synthetic COX inhibitors inhibited the growth of the TC cells. Both COX-1 and COX-2 are induced in testicular cancer, and these results indicate that both COX-1 and COX-2 are essential for the growth of TC cells.
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Affiliation(s)
- T Hase
- Department of Urology, Osaka City University Medical School, 1-4-3 Asahi-machi, Abenoku, Osaka 545-8585, Japan
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Konno S, Konno N, Yokobori M, Kazui K, Hase T, Uematsu T, Nishimura M. Autoimmune thyroid disease accompanied by recurring episodes of painful thyroid ameliorated by thyroidectomy. J Endocrinol Invest 2002; 25:996-1000. [PMID: 12553562 DOI: 10.1007/bf03344075] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
A 71-yr-old female initially presented with clinical and biochemical hyperthyroidism with high TSH binding inhibitory immunoglobulin (TBII) and anti-thyroid peroxidase antibody (TPOAb) titers. Histological findings of the thyroid revealed hyperplasia with a focal germinal center, indicating Graves' disease and mild focal chronic thyroiditis. Four episodes of painful and tender thyroid occurred over the next 2 yr accompanied by acute inflammatory reactions. The first episode that developed while the patient was in a hyperthyroid state was soon followed by hypothyroidism associated with further increases in anti-thyroglobulin antibody (TGAb) and TPOAb titers. The subsequent 3 episodes occurred during the hypothyroid state, when the TGAb titer progressively increased with each episode. We performed subtotal thyroidectomy to prevent further episodes. Specimens obtained at thyroidectomy showed that extreme fibrosis had replaced the thyroid parenchyma with collapsed follicles and moderate lymphocyte infiltration. No further episodes occurred after thyroidectomy, and during a 3-yr follow-up period, TBII and thyroid-stimulating antibody (TSAb) disappeared and TGAb and TPOAb titers decreased. This case report provides further evidence supporting the notion that thyroid epithelial destruction progresses during relatively short periods of recurrent painful thyroid and that thyroidectomy helps patients affected by this condition that are unresponsive to other treatment strategies.
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Affiliation(s)
- S Konno
- First Department of Medicine, Hokkaido University School of Medicine, Sapporo, Hokkaido, Japan.
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Murase T, Nagasawa A, Suzuki J, Hase T, Tokimitsu I. Beneficial effects of tea catechins on diet-induced obesity: stimulation of lipid catabolism in the liver. Int J Obes (Lond) 2002; 26:1459-64. [PMID: 12439647 DOI: 10.1038/sj.ijo.0802141] [Citation(s) in RCA: 341] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2002] [Revised: 05/20/2002] [Accepted: 05/27/2002] [Indexed: 01/27/2023]
Abstract
OBJECTIVE Obesity has increased at an alarming rate in recent years and is now a worldwide health problem. We investigated the effects of long-term feeding with tea catechins, which are naturally occurring polyphenolic compounds widely consumed in Asian countries, on the development of obesity in C57BL/6J mice. DESIGN We measured body weight, adipose tissue mass and liver fat content in mice fed diets containing either low-fat (5% triglyceride (TG)), high-fat (30% TG), or high-fat supplemented with 0.1-0.5% (w/w) tea catechins for 11 months. The beta-oxidation activities and related mRNA levels were measured after 1 month of feeding. RESULTS Supplementation with tea catechins resulted in a significant reduction of high-fat diet-induced body weight gain, visceral and liver fat accumulation, and the development of hyperinsulinemia and hyperleptinemia. Feeding with tea catechins for 1 month significantly increased acyl-CoA oxidase and medium chain acyl-CoA dehydrogenase mRNA expression as well as beta-oxidation activity in the liver. CONCLUSION The stimulation of hepatic lipid metabolism might be a factor responsible for the anti-obesity effects of tea catechins. The present results suggest that long-term consumption of tea catechins is beneficial for the suppression of diet-induced obesity, and it may reduce the risk of associated diseases including diabetes and coronary heart disease.
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Affiliation(s)
- T Murase
- Biological Science Laboratories, Kao Corporation, Tochigi, Japan
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Kurisu G, Kusunoki M, Onda Y, Kimata-Ariga Y, Hase T. Structure of the electron transfer complex between ferredoxin and ferredoxin-NADP +redeuctase from maize. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302089201] [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: 11/10/2022] Open
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Abstract
Loop-mediated isothermal amplification (LAMP) is a novel nucleic acid amplification method that amplifies DNA with high specificity, efficiency and rapidity under isothermal conditions using a set of four specially designed primers and a DNA polymerase with strand displacement activity. We have developed a method that accelerates the LAMP reaction by using additional primers, termed loop primers. Loop primers hybridize to the stem-loops, except for the loops that are hybridized by the inner primers, and prime strand displacement DNA synthesis. Although both inner and loop primers react via the loops, they do so by different mechanisms. The LAMP method presented here uses loop primers to achieve reaction times of less than half that of the original LAMP method. Since the total time of analysis including detection is less than 1h, this new method should facilitate genetic analysis, including genetic diagnosis in the clinical laboratory.
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Affiliation(s)
- K Nagamine
- Eiken Chemical Co. Ltd. 1381-3 Shimoishigami, Ohtawara, Tochigi 324-0036, Japan.
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Hase T, Tani T, Nishimura S, Matuno S, Terada M, Matsuda M. Crit Care 2002; 6:P191. [DOI: 10.1186/cc1653] [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: 11/10/2022] Open
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Watanabe M, Hase T, Imai Y. Change in the bisphenol A content in a polycarbonate orthodontic bracket and its leaching characteristics in water. Dent Mater J 2001; 20:353-8. [PMID: 11915629 DOI: 10.4012/dmj.20.353] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [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: 11/23/2022]
Abstract
The change in the bisphenol A (BPA) content in a polycarbonate (PC) orthodontic bracket and its leaching characteristics were studied by immersing the bracket in water because BPA has been the matter of controversy in dentistry due to its estrogenic potential. PC brackets were placed in water at 37 degrees C and 60 degrees C and the BPA content in the bracket and the amount of BPA released into the water were analyzed at appropriate intervals by high performance liquid chromatography. The BPA content increased in the water with time and was 3.8-fold after 12 months at 37 degrees C and 12.4-fold after 14 weeks at 60 degrees C compared with the virgin value. The rate of BPA release also increased with time. The results suggested that BPA was released from the bracket time-dependently in the oral cavity. However, it was assessed that little or no estrogenic effect due to the released BPA is expected in the human body.
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Affiliation(s)
- M Watanabe
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10, Kanda-Surugadai, Tokyo, 101-0062, Japan
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42
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Doi O, Kusunoki H, Sato T, Kawakami S, Fukuoka T, Okuda K, Ito O, Saito E, Hayashi T, Hase T, Kamiyosh M. Serum progesterone and estradiol-17beta concentrations, and lapaloscopic observations of the ovary in the cheetah (Acinonyxjubatus) with pregnant mare serum gonadotropin and human chorionic gonadotropin treatments. J Vet Med Sci 2001; 63:1361-4. [PMID: 11789621 DOI: 10.1292/jvms.63.1361] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
In 3 adult female cheetahs, induced-superovulation treatment was conducted, by means of 200 IU of pregnant mare serum gonadotropin (PMSG) and 100 IU of human chorionic gonadotropin (hCG) 80 hr after PMSG. The administration of PMSG created a sharp increase in the estradiol-17beta concentration, resulting in 232 pg/ml 8 hr later in one specimen out of three. The hCG administration showed an increase in the progesterone concentration of 2.29 ng/ml 46 hr later. In addition, after direct observation of the ovary surface by laparoscopy, 5 follicles in the right ovary over 2 mm in diameter, and 7 corpora lutea (5 in the right ovary and 2 in the left) were found. It is assumed that ovulation can be induced with hCG after 80 hr on PMSG during a cheetah's diestrus or proestrus.
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Affiliation(s)
- O Doi
- Faculty of Agriculture, Gifu University, Japan
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Sun HF, Hase T, Hata N, Kasahara I, Taguchi S. Extraction and separation of cationic surfactants from river sediments: application to a spectrophotometric determination of cationic surfactant in an aquatic environment using membrane filters. ANAL SCI 2001; 17:1291-4. [PMID: 11759511 DOI: 10.2116/analsci.17.1291] [Citation(s) in RCA: 10] [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: 11/23/2022]
Abstract
The quantitative extraction of cationic surfactant (CS+) in river sediments was studied. Further, the developed method was applied to the spectrophotometric determination of CS+ in urban river sediment samples by solid-phase extraction with membranes. A mixture of methanol and hydrochloric acid was proposed as an eluent. Dried sediment was digested in the eluent under ultrasonic irradiation. After elution, the eluent was evaporated to almost dryness. The residue was dissolved in a small volume of methanol and diluted to a certain volume with water. The pH of the solution was adjusted to 4-5 to separate iron and some other metals as precipitates of hydroxides. The solution was passed through two-piled membranes: first glass-fiber and then polytetrafluoroethylene (PTFE) membranes. A small volume of methanol was passed through the membranes to elute any CS+ retaining on the membranes. After passing the methanol solution through a cationic exchange resin column, the retained CS+ was eluted with methanol containing a high concentration of sodium chloride. Water, Bromophenol Blue (BPB) and hydrochloric acid were added to the solution. The solution was passed through a mixed cellulose ester membrane filter to retain an ion associate of CS+.BPB-. The retained ion associate was dissolved in a small volume of N,N-dimethylformamide together with the membrane filter, followed by the addition of triethanolamine to make the solution alkaline. The absorbance due to BPB2- was measured at 603 nm against a reagent blank. This method was applied to the determination of CS+ in river water and sediment. A cationic surfactant in sediments at 10(-5) mol kg-1 levels was detected with satisfactory precision. It was found that CS+ was about 500-fold enriched in the sediment from water at the place where domestic wastewater was discharged.
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Affiliation(s)
- H F Sun
- Faculty of Science, Toyama University, Gofuku 3190, Toyama 930-8555, Japan
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Chargui J, Hase T, Wada S, Naganuma T, Yoshimura R. NKT cells as nonspecific immune-regulator inducing tolerance in mouse model transplantation. Transplant Proc 2001; 33:3833-4. [PMID: 11750633 DOI: 10.1016/s0041-1345(01)02623-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- J Chargui
- Unit of Transplant and Clinical Immunology, Hospital E. Herriot, Lyon, France
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Nagamine K, Watanabe K, Ohtsuka K, Hase T, Notomi T. Loop-mediated isothermal amplification reaction using a nondenatured template. Clin Chem 2001; 47:1742-3. [PMID: 11514425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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46
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Kurisu G, Kusunoki M, Kimata-Ariga Y, Hase T. [Structure of the electron transfer complex between plant type ferredoxin and ferredoxin dependent assimilatory enzymes]. Tanpakushitsu Kakusan Koso 2001; 46:1661-7. [PMID: 11579563] [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] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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47
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Meguro S, Higashi K, Hase T, Honda Y, Otsuka A, Tokimitsu I, Itakura H. Solubilization of phytosterols in diacylglycerol versus triacylglycerol improves the serum cholesterol-lowering effect. Eur J Clin Nutr 2001; 55:513-7. [PMID: 11464223 DOI: 10.1038/sj.ejcn.1601173] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2000] [Revised: 12/18/2000] [Accepted: 12/20/2000] [Indexed: 11/09/2022]
Abstract
OBJECTIVE This study was performed to investigate the difference in the serum-cholesterol- and triglyceride-lowering activities between phytosterols dissolved in diacylglycerol (PS/DG) and dispersed in triacylglycerol (PS/TG). The effects of the solvent on the concentrations of serum beta-sitosterol and campesterol were examined. DESIGN The study had a randomised crossover design. SUBJECTS Twelve healthy normocholesterolemic or moderately hypercholesterolemic men aged 29-50 y participated in this study. INTERVENTIONS For 2 weeks before the test period (designated as the control period), all subjects consumed control mayonnaise (PS free) daily with supper and were randomly assigned to two groups for the 2 week test period; one group was given mayonnaise containing PS (500 mg/day) dissolved in DG (10 g/day), and the other mayonnaise containing PS (500 mg/day) dispersed in TG (10 g/day). After a wash out period consuming control PS-free mayonnaise for 4 weeks, the groups were reversed for 2 weeks. RESULTS PS/TG feeding had no effect on the serum cholesterol level. In contrast, PS/DG feeding significantly reduced the total and LDL cholesterol levels from the initial value of 5.57 to 5.31 mmol/l (4.7%; P<0.05) and from 3.69 to 3.39 mmol/l (7.6%; P<0.05), respectively. Moreover, the degree of total cholesterol reduction induced by PS/DG feeding in the test period was significantly greater than that induced by PS/TG feeding (P<0.05). In addition, the serum beta-sitosterol and campesterol concentrations did not change during the PS/TG or PS/DG feeding periods. CONCLUSIONS Dissolution of PS in DG had a better serum cholesterol lowering effect than dissolution in TG. SPONSORSHIP Kao Corporation.
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Affiliation(s)
- S Meguro
- Biological Science Laboratory, Kao Corporation, Tochigi, Japan
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Shimotoyodome A, Meguro S, Hase T, Tokimitsu I, Sakata T. Sulfated polysaccharides, but not cellulose, increase colonic mucus in rats with loperamide-induced constipation. Dig Dis Sci 2001; 46:1482-9. [PMID: 11478500 DOI: 10.1023/a:1010644021888] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Colonic mucus is decreased in a rat model of spastic constipation, and some types of water-insoluble dietary fiber increase colonic mucus when consumed by rats for several weeks. However, little is known about the effect of water-soluble dietary fiber on the colonic mucus. The aim of the present study was to investigate the effect of various types of water-soluble dietary fiber on colonic mucus in a rat model of spastic constipation. Oral administration of 1.5 mg/day of carrageenan and chondroitin sulfate increased the fecal excretion, epithelial mucin production, thickness of the mucous layer, and amount of luminal mucus in loperamide-administered rats. Sodium alginate, 5 mg/day, thickened the mucus layer at the fecal surface. Cellulose, 5 mg/day, increased the fecal excretion but not the colonic mucus. Carrageenan, chondroitin sulfate, and sodium alginate, but not cellulose, increased colonic mucus in the rat model of spastic constipation.
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Affiliation(s)
- A Shimotoyodome
- Biological Science Laboratories, Kao Corporation, Haga-gun, Tochigi, Japan
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Suzuki A, Yamaguchi T, Kawasaki K, Hase T, Tokimitsu I. Enhancing effect of alpha-monoisostearyl glyceryl ether on the percutaneous penetration of indomethacin through excised rat skin. Biol Pharm Bull 2001; 24:698-700. [PMID: 11411562 DOI: 10.1248/bpb.24.698] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The enhancing effect of alpha-monoisostearyl glyseryl ether (GE-IS) on the percutaneous penetration of indomethacin (IM) from test solutions in propylene glycol (PG) was investigated using the excised abdominal skin of rats in vitro. The percutaneous penetration of IM into diffusion cells was significantly increased in the presence of 0.2% or 1% (w/w) GE-IS compared with enhancer-free PG solution. Permeation parameters of IM, such as lag time and permeability coefficient, revealed that GE-IS significantly augmented the percutaneous penetration of IM from PG. These results strongly suggested that GE-IS functions as a penetration enhancer of IM through rat skin. To elucidate the mode of action of GE-IS as a penetration enhancer, the solubility of IM in the test solution and the percutaneous penetration of IM through damaged skin from which the stratum corneum had been stripped were investigated. The results suggested that GE-IS acts directly on the stratum corneum and alters the permeability of the skin.
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Affiliation(s)
- A Suzuki
- Biological Science Laboratories, Kao Co., Tochigi, Japan
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50
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Chargui J, Hase T, Watanabe Y, Wada S, Yoshimura R. Apoptosis after in vitro allostimulation of umbilical cord blood. Transplant Proc 2001; 33:2132-3. [PMID: 11377475 DOI: 10.1016/s0041-1345(01)01972-8] [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: 10/18/2022]
Affiliation(s)
- J Chargui
- Claude Bernard University, Transplantation and Clinical Immunology, Pav P, Hopital Edouard Herriot, Lyon, France
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