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Girardi F, Matz M, Stiller C, You H, Marcos Gragera R, Valkov MY, Bulliard JL, De P, Morrison D, Wanner M, O'Brian DK, Saint-Jacques N, Coleman MP, Allemani C, Hamdi-Chérif M, Kara L, Meguenni K, Regagba D, Bayo S, Cheick Bougadari T, Manraj SS, Bendahhou K, Ladipo A, Ogunbiyi OJ, Somdyala NIM, Chaplin MA, Moreno F, Calabrano GH, Espinola SB, Carballo Quintero B, Fita R, Laspada WD, Ibañez SG, Lima CA, Da Costa AM, De Souza PCF, Chaves J, Laporte CA, Curado MP, de Oliveira JC, Veneziano CLA, Veneziano DB, Almeida ABM, Latorre MRDO, Rebelo MS, Santos MO, Azevedo e Silva G, Galaz JC, Aparicio Aravena M, Sanhueza Monsalve J, Herrmann DA, Vargas S, Herrera VM, Uribe CJ, Bravo LE, Garcia LS, Arias-Ortiz NE, Morantes D, Jurado DM, Yépez Chamorro MC, Delgado S, Ramirez M, Galán Alvarez YH, Torres P, Martínez-Reyes F, Jaramillo L, Quinto R, Castillo J, Mendoza M, Cueva P, Yépez JG, Bhakkan B, Deloumeaux J, Joachim C, Macni J, Carrillo R, Shalkow Klincovstein J, Rivera Gomez R, Perez P, Poquioma E, Tortolero-Luna G, Zavala D, Alonso R, Barrios E, Eckstrand A, Nikiforuk C, Woods RR, Noonan G, Turner D, Kumar E, Zhang B, Dowden JJ, Doyle GP, Saint-Jacques N, Walsh G, Anam A, De P, McClure CA, Vriends KA, Bertrand C, Ramanakumar AV, Davis L, Kozie S, Freeman T, George JT, Avila RM, O’Brien DK, Holt A, Almon L, Kwong S, Morris C, Rycroft R, Mueller L, Phillips CE, Brown H, Cromartie B, Ruterbusch J, Schwartz AG, Levin GM, Wohler B, Bayakly R, Ward KC, Gomez SL, McKinley M, Cress R, Davis J, Hernandez B, Johnson CJ, Morawski BM, Ruppert LP, Bentler S, Charlton ME, Huang B, Tucker TC, Deapen D, Liu L, Hsieh MC, Wu XC, Schwenn M, Stern K, Gershman ST, Knowlton RC, Alverson G, Weaver T, Desai J, Rogers DB, Jackson-Thompson J, Lemons D, Zimmerman HJ, Hood M, Roberts-Johnson J, Hammond W, Rees JR, Pawlish KS, Stroup A, Key C, Wiggins C, Kahn AR, Schymura MJ, Radhakrishnan S, Rao C, Giljahn LK, Slocumb RM, Dabbs C, Espinoza RE, Aird KG, Beran T, Rubertone JJ, Slack SJ, Oh J, Janes TA, Schwartz SM, Chiodini SC, Hurley DM, Whiteside MA, Rai S, Williams MA, Herget K, Sweeney C, Kachajian J, Keitheri Cheteri MB, Migliore Santiago P, Blankenship SE, Conaway JL, Borchers R, Malicki R, Espinoza J, Grandpre J, Weir HK, Wilson R, Edwards BK, Mariotto A, Rodriguez-Galindo C, Wang N, Yang L, Chen JS, Zhou Y, He YT, Song GH, Gu XP, Mei D, Mu HJ, Ge HM, Wu TH, Li YY, Zhao DL, Jin F, Zhang JH, Zhu FD, Junhua Q, Yang YL, Jiang CX, Biao W, Wang J, Li QL, Yi H, Zhou X, Dong J, Li W, Fu FX, Liu SZ, Chen JG, Zhu J, Li YH, Lu YQ, Fan M, Huang SQ, Guo GP, Zhaolai H, Wei K, Chen WQ, Wei W, Zeng H, Demetriou AV, Mang WK, Ngan KC, Kataki AC, Krishnatreya M, Jayalekshmi PA, Sebastian P, George PS, Mathew A, Nandakumar A, Malekzadeh R, Roshandel G, Keinan-Boker L, Silverman BG, Ito H, Koyanagi Y, Sato M, Tobori F, Nakata I, Teramoto N, Hattori M, Kaizaki Y, Moki F, Sugiyama H, Utada M, Nishimura M, Yoshida K, Kurosawa K, Nemoto Y, Narimatsu H, Sakaguchi M, Kanemura S, Naito M, Narisawa R, Miyashiro I, Nakata K, Mori D, Yoshitake M, Oki I, Fukushima N, Shibata A, Iwasa K, Ono C, Matsuda T, Nimri O, Jung KW, Won YJ, Alawadhi E, Elbasmi A, Ab Manan A, Adam F, Nansalmaa E, Tudev U, Ochir C, Al Khater AM, El Mistiri MM, Lim GH, Teo YY, Chiang CJ, Lee WC, Buasom R, Sangrajrang S, Suwanrungruang K, Vatanasapt P, Daoprasert K, Pongnikorn D, Leklob A, Sangkitipaiboon S, Geater SL, Sriplung H, Ceylan O, Kög I, Dirican O, Köse T, Gurbuz T, Karaşahin FE, Turhan D, Aktaş U, Halat Y, Eser S, Yakut CI, Altinisik M, Cavusoglu Y, Türkköylü A, Üçüncü N, Hackl M, Zborovskaya AA, Aleinikova OV, Henau K, Van Eycken L, Atanasov TY, Valerianova Z, Šekerija M, Dušek L, Zvolský M, Steinrud Mørch L, Storm H, Wessel Skovlund C, Innos K, Mägi M, Malila N, Seppä K, Jégu J, Velten M, Cornet E, Troussard X, Bouvier AM, Guizard AV, Bouvier V, Launoy G, Dabakuyo Yonli S, Poillot ML, Maynadié M, Mounier M, Vaconnet L, Woronoff AS, Daoulas M, Robaszkiewicz M, Clavel J, Poulalhon C, Desandes E, Lacour B, Baldi I, Amadeo B, Coureau G, Monnereau A, Orazio S, Audoin M, D’Almeida TC, Boyer S, Hammas K, Trétarre B, Colonna M, Delafosse P, Plouvier S, Cowppli-Bony A, Molinié F, Bara S, Ganry O, Lapôtre-Ledoux B, Daubisse-Marliac L, Bossard N, Uhry Z, Estève J, Stabenow R, Wilsdorf-Köhler H, Eberle A, Luttmann S, Löhden I, Nennecke AL, Kieschke J, Sirri E, Justenhoven C, Reinwald F, Holleczek B, Eisemann N, Katalinic A, Asquez RA, Kumar V, Petridou E, Ólafsdóttir EJ, Tryggvadóttir L, Murray DE, Walsh PM, Sundseth H, Harney M, Mazzoleni G, Vittadello F, Coviello E, Cuccaro F, Galasso R, Sampietro G, Giacomin A, Magoni M, Ardizzone A, D’Argenzio A, Di Prima AA, Ippolito A, Lavecchia AM, Sutera Sardo A, Gola G, Ballotari P, Giacomazzi E, Ferretti S, Dal Maso L, Serraino D, Celesia MV, Filiberti RA, Pannozzo F, Melcarne A, Quarta F, Andreano A, Russo AG, Carrozzi G, Cirilli C, Cavalieri d’Oro L, Rognoni M, Fusco M, Vitale MF, Usala M, Cusimano R, Mazzucco W, Michiara M, Sgargi P, Boschetti L, Marguati S, Chiaranda G, Seghini P, Maule MM, Merletti F, Spata E, Tumino R, Mancuso P, Cassetti T, Sassatelli R, Falcini F, Giorgetti S, Caiazzo AL, Cavallo R, Piras D, Bella F, Madeddu A, Fanetti AC, Maspero S, Carone S, Mincuzzi A, Candela G, Scuderi T, Gentilini MA, Rizzello R, Rosso S, Caldarella A, Intrieri T, Bianconi F, Contiero P, Tagliabue G, Rugge M, Zorzi M, Beggiato S, Brustolin A, Gatta G, De Angelis R, Vicentini M, Zanetti R, Stracci F, Maurina A, Oniščuka M, Mousavi M, Steponaviciene L, Vincerževskienė I, Azzopardi MJ, Calleja N, Siesling S, Visser O, Johannesen TB, Larønningen S, Trojanowski M, Macek P, Mierzwa T, Rachtan J, Rosińska A, Kępska K, Kościańska B, Barna K, Sulkowska U, Gebauer T, Łapińska JB, Wójcik-Tomaszewska J, Motnyk M, Patro A, Gos A, Sikorska K, Bielska-Lasota M, Didkowska JA, Wojciechowska U, Forjaz de Lacerda G, Rego RA, Carrito B, Pais A, Bento MJ, Rodrigues J, Lourenço A, Mayer-da-Silva A, Coza D, Todescu AI, Valkov MY, Gusenkova L, Lazarevich O, Prudnikova O, Vjushkov DM, Egorova A, Orlov A, Pikalova LV, Zhuikova LD, Adamcik J, Safaei Diba C, Zadnik V, Žagar T, De-La-Cruz M, Lopez-de-Munain A, Aleman A, Rojas D, Chillarón RJ, Navarro AIM, Marcos-Gragera R, Puigdemont M, Rodríguez-Barranco M, Sánchez Perez MJ, Franch Sureda P, Ramos Montserrat M, Chirlaque López MD, Sánchez Gil A, Ardanaz E, Guevara M, Cañete-Nieto A, Peris-Bonet R, Carulla M, Galceran J, Almela F, Sabater C, Khan S, Pettersson D, Dickman P, Staehelin K, Struchen B, Egger Hayoz C, Rapiti E, Schaffar R, Went P, Mousavi SM, Bulliard JL, Maspoli-Conconi M, Kuehni CE, Redmond SM, Bordoni A, Ortelli L, Chiolero A, Konzelmann I, Rohrmann S, Wanner M, Broggio J, Rashbass J, Stiller C, Fitzpatrick D, Gavin A, Morrison DS, Thomson CS, Greene G, Huws DW, Grayson M, Rawcliffe H, Allemani C, Coleman MP, Di Carlo V, Girardi F, Matz M, Minicozzi P, Sanz N, Ssenyonga N, James D, Stephens R, Chalker E, Smith M, Gugusheff J, You H, Qin Li S, Dugdale S, Moore J, Philpot S, Pfeiffer R, Thomas H, Silva Ragaini B, Venn AJ, Evans SM, Te Marvelde L, Savietto V, Trevithick R, Aitken J, Currow D, Fowler C, Lewis C. Global survival trends for brain tumors, by histology: analysis of individual records for 556,237 adults diagnosed in 59 countries during 2000-2014 (CONCORD-3). Neuro Oncol 2023; 25:580-592. [PMID: 36355361 PMCID: PMC10013649 DOI: 10.1093/neuonc/noac217] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Survival is a key metric of the effectiveness of a health system in managing cancer. We set out to provide a comprehensive examination of worldwide variation and trends in survival from brain tumors in adults, by histology. METHODS We analyzed individual data for adults (15-99 years) diagnosed with a brain tumor (ICD-O-3 topography code C71) during 2000-2014, regardless of tumor behavior. Data underwent a 3-phase quality control as part of CONCORD-3. We estimated net survival for 11 histology groups, using the unbiased nonparametric Pohar Perme estimator. RESULTS The study included 556,237 adults. In 2010-2014, the global range in age-standardized 5-year net survival for the most common sub-types was broad: in the range 20%-38% for diffuse and anaplastic astrocytoma, from 4% to 17% for glioblastoma, and between 32% and 69% for oligodendroglioma. For patients with glioblastoma, the largest gains in survival occurred between 2000-2004 and 2005-2009. These improvements were more noticeable among adults diagnosed aged 40-70 years than among younger adults. CONCLUSIONS To the best of our knowledge, this study provides the largest account to date of global trends in population-based survival for brain tumors by histology in adults. We have highlighted remarkable gains in 5-year survival from glioblastoma since 2005, providing large-scale empirical evidence on the uptake of chemoradiation at population level. Worldwide, survival improvements have been extensive, but some countries still lag behind. Our findings may help clinicians involved in national and international tumor pathway boards to promote initiatives aimed at more extensive implementation of clinical guidelines.
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Affiliation(s)
- Fabio Girardi
- Cancer Survival Group, London School of Hygiene and Tropical Medicine, London, UK.,Cancer Division, University College London Hospitals NHS Foundation Trust, London, UK.,Division of Medical Oncology 2, Veneto Institute of Oncology IOV-IRCCS, Padua, Italy
| | - Melissa Matz
- Cancer Survival Group, London School of Hygiene and Tropical Medicine, London, UK
| | - Charles Stiller
- National Cancer Registration and Analysis Service, Public Health England, London, UK
| | - Hui You
- Cancer Information Analysis Unit, Cancer Institute NSW, St Leonards, New South Wales, Australia
| | - Rafael Marcos Gragera
- Epidemiology Unit and Girona Cancer Registry, Catalan Institute of Oncology, Girona, Spain
| | - Mikhail Y Valkov
- Department of Radiology, Radiotherapy and Oncology, Northern State Medical University, Arkhangelsk, Russia
| | - Jean-Luc Bulliard
- Centre for Primary Care and Public Health (Unisanté), University of Lausanne, Lausanne, Switzerland.,Neuchâtel and Jura Tumour Registry, Neuchâtel, Switzerland
| | - Prithwish De
- Surveillance and Cancer Registry, and Research Office, Clinical Institutes and Quality Programs, Ontario Health, Toronto, Ontario, Canada
| | - David Morrison
- Scottish Cancer Registry, Public Health Scotland, Edinburgh, UK
| | - Miriam Wanner
- Cancer Registry Zürich, Zug, Schaffhausen and Schwyz, University Hospital Zürich, Zürich, Switzerland
| | - David K O'Brian
- Alaska Cancer Registry, Alaska Department of Health and Social Services, Anchorage, Alaska, USA
| | - Nathalie Saint-Jacques
- Department of Medicine and Community Health and Epidemiology, Centre for Clinical Research, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Michel P Coleman
- Cancer Survival Group, London School of Hygiene and Tropical Medicine, London, UK.,Cancer Division, University College London Hospitals NHS Foundation Trust, London, UK
| | - Claudia Allemani
- Cancer Survival Group, London School of Hygiene and Tropical Medicine, London, UK
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Arai Y, Kuroda K, Nomoto T, Tin ZH, Sakuragi S, Bareille C, Akebi S, Kurokawa K, Kinoshita Y, Zhang WL, Shin S, Tokunaga M, Kitazawa H, Haga Y, Suzuki HS, Miyasaka S, Tajima S, Iwasa K, Arita R, Kondo T. Multipole polaron in the devil's staircase of CeSb. Nat Mater 2022; 21:410-415. [PMID: 35145257 DOI: 10.1038/s41563-021-01188-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 12/10/2021] [Indexed: 06/14/2023]
Abstract
Rare-earth intermetallic compounds exhibit rich phenomena induced by the interplay between localized f orbitals and conduction electrons. However, since the energy scale of the crystal-electric-field splitting is only a few millielectronvolts, the nature of the mobile electrons accompanied by collective crystal-electric-field excitations has not been unveiled. Here, we examine the low-energy electronic structures of CeSb through the anomalous magnetostructural transitions below the Néel temperature, ~17 K, termed the 'devil's staircase', using laser angle-resolved photoemission, Raman and neutron scattering spectroscopies. We report another type of electron-boson coupling between mobile electrons and quadrupole crystal-electric-field excitations of the 4f orbitals, which renormalizes the Sb 5p band prominently, yielding a kink at a very low energy (~7 meV). This coupling strength is strong and exhibits anomalous step-like enhancement during the devil's staircase transition, unveiling a new type of quasiparticle, named the 'multipole polaron', comprising a mobile electron dressed with a cloud of the quadrupole crystal-electric-field polarization.
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Affiliation(s)
- Y Arai
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Japan
| | - Kenta Kuroda
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Japan.
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashihiroshima, Japan.
| | - T Nomoto
- Department of Applied Physics, The University of Tokyo, Tokyo, Japan
| | - Z H Tin
- Department of Physics, Osaka University, Toyonaka, Japan
| | - S Sakuragi
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Japan
| | - C Bareille
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Japan
| | - S Akebi
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Japan
| | - K Kurokawa
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Japan
| | - Y Kinoshita
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Japan
| | - W-L Zhang
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Japan
- Department of Engineering and Applied Sciences, Sophia University, Tokyo, Japan
| | - S Shin
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Japan
- Office of University Professor, The University of Tokyo, Kashiwa, Japan
| | - M Tokunaga
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Japan
- Trans-scale Quantum Science Institute, The University of Tokyo, Tokyo, Japan
| | - H Kitazawa
- National Institute for Materials Science, Tsukuba, Japan
| | - Y Haga
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Japan
| | - H S Suzuki
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Japan
| | - S Miyasaka
- Department of Physics, Osaka University, Toyonaka, Japan
| | - S Tajima
- Department of Physics, Osaka University, Toyonaka, Japan
| | - K Iwasa
- Frontier Research Center for Applied Atomic Sciences and Institute of Quantum Beam Science, Ibaraki University, Tokai, Japan
| | - R Arita
- Department of Applied Physics, The University of Tokyo, Tokyo, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Japan
| | - Takeshi Kondo
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Japan
- Trans-scale Quantum Science Institute, The University of Tokyo, Tokyo, Japan
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Iwasa K, Yoshikawa H, Furukawa Y, Yamada M. Upregulation of programmed cell death ligand 1 expression in the skeletal muscle of patients with myasthenia gravis. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Shimoyama M, Iwasa K, Sonoyama S. The prevalence of mental health problems in adults with intellectual disabilities in Japan, associated factors and mental health service use. J Intellect Disabil Res 2018; 62:931-940. [PMID: 29968366 DOI: 10.1111/jir.12515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 03/15/2018] [Accepted: 06/10/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND People with intellectual disabilities are more likely than people in the general population to experience life events associated with an increased risk of mental health problems. However, there has been little research in Japan on the prevalence of mental health problems in adults with intellectual disability (ID) or on associated factors and access to relevant services. METHODS Informants completed the Japanese version of the Psychiatric Assessment Schedule for Adults with Developmental Disabilities Checklist, and questions on the use of mental health services, for 126 adults with ID living in Tokyo. RESULTS A total of 23.8% of adults with ID had scores above the Psychiatric Assessment Schedule for Adults with Developmental Disabilities Checklist threshold score. Mental health problems were associated with age, gender and life events and not associated with the level of ID or living environment. Approximately 60% of participants with mental health problems were treated by psychiatrists and 6% of them received psychotherapy. CONCLUSION In the present study, mental health problems occurred in adults with ID at similar frequencies as in previous studies. Adults with ID who experienced mental health problems tended to receive less psychological therapy than the general Japanese population experiencing such problems. This result may indicate poor provision of psychological services for people with intellectual disabilities in Japan.
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Affiliation(s)
- M Shimoyama
- Faculty of Education, Shinshu University, Nagano, Japan
| | - K Iwasa
- Department of Educational Psychology, Shujitsu University, Okayama, Japan
| | - S Sonoyama
- Faculty of Human Sciences, University of Tsukuba, Ibaraki, Japan
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Nakano H, Ikeda T, Shimizu A, Ozaki T, Komatsu J, Nozaki I, Hamaguchi T, Iwasa K, Tanaka K, Yamada M. Total tau protein in cerebrospinal fluid as a prognostic marker in anti-N-methyl-D-aspartate receptor encephalitis. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1845] [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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Yoshikawa H, Iwasa K, Adachi Y, Edahiro S, Maruta T, Furukawa Y, Masahito Y, Matsui M. Ten-year chronological clinical profiles of myasthenia Gravis in Japan -epidemiological analyses of the national database established by the policy of intractable diseases of Japan. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Tomiyasu K, Iwasa K, Ueda H, Niitaka S, Takagi H, Ohira-Kawamura S, Kikuchi T, Inamura Y, Nakajima K, Yamada K. Spin-orbit fluctuations in frustrated heavy-fermion metal LiV(2)O(4). Phys Rev Lett 2014; 113:236402. [PMID: 25526141 DOI: 10.1103/physrevlett.113.236402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Indexed: 06/04/2023]
Abstract
Spin fluctuations were studied over a wide momentum (ℏQ) and energy (E) space in the frustrated d-electron heavy-fermion metal LiV_{2}O_{4} by time-of-flight inelastic neutron scattering. We observed the overall Q-E evolutions near the characteristic Q=0.6 Å^{-1} peak and found another weak broad magnetic peak around 2.4 Å^{-1}. The data are described by a simple response function, a partially delocalized magnetic form factor, and antiferromagnetic short-range spatial correlations, indicating that heavy-fermion formation is attributable to spin-orbit fluctuations with orbital hybridization.
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Affiliation(s)
- K Tomiyasu
- Department of Physics, Tohoku University, Aoba, Sendai 980-8578, Japan
| | - K Iwasa
- Department of Physics, Tohoku University, Aoba, Sendai 980-8578, Japan
| | - H Ueda
- Department of Chemistry, Kyoto University, Kyoto 606-8502, Japan
| | - S Niitaka
- RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - H Takagi
- Department of Physics, University of Tokyo, Hongo 113-0033, Japan
| | - S Ohira-Kawamura
- J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1106, Japan
| | - T Kikuchi
- J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1106, Japan
| | - Y Inamura
- J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1106, Japan
| | - K Nakajima
- J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1106, Japan
| | - K Yamada
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Oho, Tsukuba 305-0801, Japan
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Iwasa K, Yamamoto S, Takahashi M, Suzuki S, Yagishita S, Awaji T, Maruyama K, Yoshikawa K. Prostaglandin F2α FP receptor inhibitor reduces demyelination and motor dysfunction in a cuprizone-induced multiple sclerosis mouse model. Prostaglandins Leukot Essent Fatty Acids 2014; 91:175-82. [PMID: 25224839 DOI: 10.1016/j.plefa.2014.08.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 08/27/2014] [Accepted: 08/28/2014] [Indexed: 12/17/2022]
Abstract
Previously, we have demonstrated that prostamide/PGF synthase, which catalyzes the reduction of prostaglandin (PG) H2 to PGF2α, is constitutively expressed in myelin sheaths and cultured oligodendrocytes, suggesting that PGF2α has functional significance in myelin-forming oligodendrocytes. To investigate the effects of PGF2α/FP receptor signaling on demyelination, we administrated FP receptor agonist and antagonist to cuprizone-exposed mice, a model of multiple sclerosis. Mice were fed a diet containing 0.2% cuprizone for 5 weeks, which induces severe demyelination, glial activation, proinflammatory cytokine expression, and motor dysfunction. Administration of the FP receptor antagonist AL-8810 attenuated cuprizone-induced demyelination, glial activation, and TNFα expression in the corpus callosum, and also improved the motor function. These data suggest that during cuprizone-induced demyelination, PGF2α/FP receptor signaling contributes to glial activation, neuroinflammation, and demyelination, resulting in motor dysfunction. Thus, FP receptor inhibition may be a useful symptomatic treatment in multiple sclerosis.
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Affiliation(s)
- K Iwasa
- Department of Pharmacology, Faculty of Medicine, Saitama Medical University, 38 Moro-hongo, Moroyama-machi, Iruma-gun, Saitama 350-0495, Japan
| | - S Yamamoto
- Department of Pharmacology, Faculty of Medicine, Saitama Medical University, 38 Moro-hongo, Moroyama-machi, Iruma-gun, Saitama 350-0495, Japan
| | - M Takahashi
- Department of Pharmacology, Faculty of Medicine, Saitama Medical University, 38 Moro-hongo, Moroyama-machi, Iruma-gun, Saitama 350-0495, Japan
| | - S Suzuki
- Department of Pharmacology, Faculty of Medicine, Saitama Medical University, 38 Moro-hongo, Moroyama-machi, Iruma-gun, Saitama 350-0495, Japan
| | - S Yagishita
- Department of Pharmacology, Faculty of Medicine, Saitama Medical University, 38 Moro-hongo, Moroyama-machi, Iruma-gun, Saitama 350-0495, Japan
| | - T Awaji
- Department of Pharmacology, Faculty of Medicine, Saitama Medical University, 38 Moro-hongo, Moroyama-machi, Iruma-gun, Saitama 350-0495, Japan
| | - K Maruyama
- Department of Pharmacology, Faculty of Medicine, Saitama Medical University, 38 Moro-hongo, Moroyama-machi, Iruma-gun, Saitama 350-0495, Japan
| | - K Yoshikawa
- Department of Pharmacology, Faculty of Medicine, Saitama Medical University, 38 Moro-hongo, Moroyama-machi, Iruma-gun, Saitama 350-0495, Japan.
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9
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Yokoo T, Ohoyama K, Itoh S, Suzuki J, Nanbu M, Kaneko N, Iwasa K, Sato TJ, Kimura H, Ohkawara M. Construction of Polarized Inelastic Neutron Spectrometer in J-PARC. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/1742-6596/502/1/012046] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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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10
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Kawakita K, Nishiyama T, Fujishiro T, Hayashi S, Kanzaki N, Hashimoto S, Takebe K, Iwasa K, Sakata S, Nishida K, Kuroda R, Kurosaka M. Akt phosphorylation in human chondrocytes is regulated by p53R2 in response to mechanical stress. Osteoarthritis Cartilage 2012; 20:1603-9. [PMID: 22954457 DOI: 10.1016/j.joca.2012.08.022] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Revised: 08/19/2012] [Accepted: 08/23/2012] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The p53 tumor-suppressor protein p53R2 is activated in response to various stressors that act on cell signaling. When DNA is damaged, phosphorylation of p53 at its Ser 15 residue induces p53R2 production. The role of p53R2 in chondrocytes remains poorly understood. In this study, we evaluated in chondrocytes, p53R2 expression and its regulation in response to mechanical stress. Furthermore, we investigated the function of p53R2 in relation to mechanotransduction. METHODS Osteoarthritis (OA) cartilage obtained from total knee replacements and normal cartilage obtained from femoral neck fractures was used to measure p53R2 expression by using immunohistochemistry, western blotting, and real-time polymerase chain reaction (PCR). The OA chondrocytes were subjected to a high magnitude of cyclical tensile strain by using an FX-2000 Flexercell system. Next, sulfated glycosaminoglycan (sGAG) production was quantified in these cells. Protein expression of p53R2, and phosphorylation of Akt, p38MAPK, ERK1/2, and JNK was also detected using western blotting. Moreover, Akt phosphorylation was detected after transfecting the cells with p53R2-specific small interfering RNA (siRNA). RESULTS Expression of p53R2 was significantly increased in OA chondrocytes and in chondrocytes after applying 5% tensile strain to the cells. However, Akt phosphorylation was down-regulated in OA chondrocytes after the strain, and was up-regulated after transfection of p53R2. sGAG protein as well as collagen type II and aggrecan mRNA was increased following transfection of p53R2-specific siRNA after 5% tensile strain. CONCLUSIONS p53R2 could regulate matrix synthesis via Akt phosphorylation during chondrocyte mechanotransduction. Down-regulation of p53R2 may be a new therapeutic approach in OA therapy.
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Affiliation(s)
- K Kawakita
- Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, 7-5-2 Kusunokicho, Chuo-ku, Kobe, Japan
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11
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Bando T, Kasahara K, Shibata K, Numata Y, Heki U, Shirasaki H, Iwasa K, Fujimura M, Matsuda T. Cytotoxicity of a novel indoloquinone eo9 in hypoxic non-small-cell lung-cancer cell-lines. Int J Oncol 2012; 7:789-93. [PMID: 21552905 DOI: 10.3892/ijo.7.4.789] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
3-Hydroxymethyl-5-aziridinyl-1-methyl-[1H-indole-4,7-dione]-prop-beta-en -alpha-ol (EO9) is a bioreductive anticancer agent active for non-small cell lung cancer (NSCLC) and structurally related to mitomycin C (MMC). DT-diaphorase (DTD) is regarded as a two electron reductase that plays an important role in the biotransformation of MMC to antitumor metabolites. To evaluate the role of DTD as a bioactivator of EO9 in NSCLC cell lines under oxic and hypoxic conditions, we examined the inhibitory effect of dicumarol which was regarded as a selective inhibitor of DTD on the sensitivity to EO9 in vitro. In this study, we used an MMC-resistant NSCLC cell line (PC-9/MC4) which was established from a PC-9 cell line as a parent cell line by continuous exposure to MMC in our laboratory. We reported previously that the subline PC-9/MC4 was 6.7-fold more resistant to MMC than PC-9 with decreased DTD activity. The IC50 value of PC-9 against EO9 was significantly increased by co-incubation with dicumarol under oxic conditions. EO9 was more cytotoxic against PC-9/MC4 than against PC-9 cells and the enhancement was impaired by tempol under hypoxic conditions. These findings suggest a suppressive role of DTD against one-electron reduction pathway in the bioactivation of EO9 under hypoxic conditions and EO9 may be more active against oxygen-deficient solid tumors especially in MMC-resistant NSCLC cells with low levels of DTD activity.
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12
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Bando T, Fujimura M, Kasahara K, Shibata K, Shirasaki H, Heki U, Iwasa K, Ueda A, Tomikawa S, Matsuda T. Stimulation of beta-adrenoceptor enhances sensitivity to cisplatin in non-small cell lung cancer cell lines. Int J Oncol 2012; 10:1197-201. [PMID: 21533504 DOI: 10.3892/ijo.10.6.1197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Cisplatin is a key drug in chemotherapy for lung cancer. It has been reported that intracellular accumulation of cisplatin is an important step as a determinant for resistance to cisplatin, which may be modulated by Na+, K+-ATPase activity. And it has been reported that beta-adrenoceptor agonists modulate the Na+, K+-ATPase in some organs. In this study, the effects of a beta-adrenoceptor agonist and an antagonist on membrane Na+, K+-ATPase activity were evaluated using human non-small cell (NSCLC) lung cancer cell lines. In the NSCLC cell lines, sensitivity to cisplatin was improved by treatment with isoproterenol. Na+, K+-ATPase was activated and intracellular accumulation of cisplatin increased with the treatment. But the antagonist, propranolol, did not modulate sensitivity to cisplatin or Na+, K+-ATPase activity. These results suggest that beta-adrenoceptors may be one of the determinant for sensitivity to cisplatin in NSCLC, but endogenous catecholamine dose not play a role in the intracellular accumulation of cisplatin in these cell lines. Exogenous beta-adrenoceptor agonists may improve the antitumor effect of chemotherapy involving cisplatin.
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13
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Iwasa K, Moriyasu M, Wiegrebe W. Some contributions to the application of LC-NMR, LC-MS, and LC-CD to the biosynthesis of isoquinoline alkaloids using callus cultures. Pharmazie 2012; 67:571-585. [PMID: 22888511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Hyphenated spectroscopic techniques in combination with a special extraction and work-up of plant calli cultures of Berberidaceae, Fumariaceae, and Papaveraceae families, e.g., enabled us to get deeper insight into the sequential biochemical conversions of precursors into simple isoquinoline- and protoberberine-alkaloids and their follow-up-products with different skeletons. Some new alkaloids of these types have been found.
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Affiliation(s)
- K Iwasa
- Department of Natural Medicinal Chemistry, Kobe Pharmaceutical University, Japan.
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14
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Matsumoto T, Iwasa K, Kyuragi R, Honma K, Guntani A, Ohmine T, Itoh H, Onohara T, Maehara Y. The efficacy of oral beraprost sodium, a prostaglandin I2 analogue, for treating intermittent claudication in patients with arteriosclerosis obliterans. INT ANGIOL 2010; 29:49-54. [PMID: 20357749] [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: 05/29/2023]
Abstract
AIM This study aimed to evaluate the effect of oral beraprost sodium, a prostaglandin I2 analogue, on symptoms of intermittent claudication in patients with arteriosclerosis obliterans. The research design consisted of a before and after treatment study without comparison groups. The subjects comprised arteriosclerosis obliterans patients who experienced intermittent claudication. Furthermore, this study aimed to assess the mechanism of action of beraprost sodium via blood sampling and measurements of flow-mediated vasodilatation before and after treatment. METHODS The study was performed prospectively in 7 patients with arteriosclerosis obliterans. Beraprost sodium (40 microg) was orally administered to 7 patients at study entry, followed by administration of 120 microg/day for 12 weeks. Blood sampling and measurements of flow-mediated vasodilatation were performed before and after treatment at study entry, 4 weeks, and 12 weeks after treatment. Treadmill exercise tests were performed three times at study entry, 4 weeks, and 12 weeks after treatment. The ankle-brachial index (ABI) was measured at rest and after exercise. RESULTS Pain-free walking distances increased by 138% at 12 weeks after treatment. Maximum walking distances increased by 133%. The ABI was significantly increased at 4 weeks and 12 weeks after treatment at rest. Endothelin-1 levels tended to be decreased at 1 h after administration of 40 microg beraprost sodium. N(G),N(G)-dimethyl-L-arginine, nitrate ions, and flow-mediated vasodilatation. CONCLUSION Beraprost sodium tended to decrease endothelin-1 levels and improved symptoms of intermittent claudication in patients with arteriosclerosis obliterans.
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Affiliation(s)
- T Matsumoto
- Department of Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
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15
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Raymond S, Kuwahara K, Kaneko K, Iwasa K, Kohgi M, Hiess A, Flouquet J, Metoki N, Sugawara H, Aoki Y, Sato H. Excitation spectrum of PrOs(4)Sb(12) under a magnetic field. J Phys Condens Matter 2009; 21:215702. [PMID: 21825559 DOI: 10.1088/0953-8984/21/21/215702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The evolution of the magnetic excitation spectrum of the heavy fermion superconductor PrOs(4)Sb(12) was studied by inelastic neutron scattering on crossing the critical field H(c2) for superconductivity at low temperature. The peak positions in energy and the peak intensities of the modes of the triplet split by magnetic field confirm the known crystal field parameters for PrOs(4)Sb(12) in T(h) symmetry. A selective broadening of the lineshape occurs on increasing the magnetic field: the linewidth of the upper mode of the triplet increases while the one of the middle mode does not.
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Affiliation(s)
- S Raymond
- CEA-DSM/INAC/SPSMS, F-38054 Grenoble, France
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16
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Shibata-Hamaguchi A, Samuraki M, Furui E, Iwasa K, Yoshikawa H, Hayashi S, Yamada M. Long-term effect of intravenous immunoglobulin on anti-MuSK antibody-positive myasthenia gravis. Acta Neurol Scand 2007; 116:406-8. [PMID: 17986100 DOI: 10.1111/j.1600-0404.2007.00877.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Anti-muscle-specific receptor tyrosine kinase (MuSK) antibody-positive myasthenia gravis (MG) patients show various responses to conventional immunosuppressive treatment and some patients are resistant to these therapies. We report a 50-year-old Japanese man with anti-MuSK antibody-positive MG, who showed no or poor response to various therapies, including plasmapheresis, corticosteroid, and tacrolimus. The patient was then treated with intravenous immunoglobulin (IVIG), and showed a good response that persisted over 20 months. The outcome of this case suggests that IVIG treatment may be an effective therapeutic option for anti-MuSK antibody-positive MG, with a potentially long-term effect.
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Affiliation(s)
- A Shibata-Hamaguchi
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Science, 13-1 Takara-machi, Kanazawa, Ishikawa, Japan.
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17
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Hashimoto Y, Okada M, Kato A, Iwasa K, Saiki K, Takao N. Cytochemical Biogenetic Studies on The Alkaloids ofMacleaya CordataR.Br With Special Reference to the Application of Histochemical Chromatography. ANAL LETT 2006. [DOI: 10.1080/00032718508066156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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18
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Kuwahara K, Iwasa K, Kohgi M, Kaneko K, Metoki N, Raymond S, Méasson MA, Flouquet J, Sugawara H, Aoki Y, Sato H. Direct observation of quadrupolar excitons in the heavy-fermion superconductor PrOs4Sb12. Phys Rev Lett 2005; 95:107003. [PMID: 16196954 DOI: 10.1103/physrevlett.95.107003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2005] [Indexed: 05/04/2023]
Abstract
We report inelastic neutron scattering experiments performed to investigate the low energy magnetic excitations on single crystals of the heavy-fermion superconductor PrOs(4)Sb(12). The observed excitation clearly softens at a wave vector Q=(1,0,0), which is the same as the modulation vector of the field-induced antiferro-quadrupolar ordering, and its intensity at Q=(1,0,0) is smaller than that around the zone center. This result directly evidences that this excitonic behavior is derived mainly from nonmagnetic quadrupolar interactions. Furthermore, the narrowing of the linewidths of the excitations below the superconducting transition temperature indicates the close connection between the superconductivity and the excitons.
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Affiliation(s)
- K Kuwahara
- Department of Physics, Tokyo Metropolitan University, Japan
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19
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Yi H, Maruyama W, Akao Y, Takahashi T, Iwasa K, Youdim MBH, Naoi M. N-Propargylamine protects SH-SY5Y cells from apoptosis induced by an endogenous neurotoxin, N-methyl(R)salsolinol, through stabilization of mitochondrial membrane and induction of anti-apoptotic Bcl-2. J Neural Transm (Vienna) 2005; 113:21-32. [PMID: 15843867 DOI: 10.1007/s00702-005-0299-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2005] [Accepted: 02/26/2005] [Indexed: 10/25/2022]
Abstract
Propargylamine derivatives, rasagiline and (-)deprenyl, are anti-Parkinson agents and protect neurons from cell death as shown by in vivo and in vitro experiments. The studies on the chemical structure-activity relationship proved that the propargyl moiety is essentially required for the neuroprotective function. In this paper, neuroprotective activity of free N-propargylamine was studied using SH-SY5Y cells expressing only type A monoamine oxidase (MAO) against apoptosis induced by an endogenous dopaminergic neurotoxin, N-methyl(R)salsolinol. N-Propargylamine prevented apoptosis, whereas N-methylpropargylamine and propiolaldehyde did not. N-Propargylamine stabilized mitochondrial membrane potential and induced anti-apoptotic Bcl-2 at 1 microM-10 nM. N-Propargylamine inhibited MAO-A in competition to substrate with the apparent K(i) value of 28 microM, which was significantly higher than the concentration required for neuroprotection. It indicates that MAO inhibition is not prerequisite for the protective function of N-propargylamine. The anti-apoptotic function of N-propargylamine is discussed in terms of neuroprotection by propargylamines in neurodegenerative diseases, including Parkinson's disease.
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Affiliation(s)
- H Yi
- Department of Neurosciences, Gifu International Institute of Biotechnology, Kakamigahara, Gifu, Japan
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20
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Kimura H, Kasahara K, Shibata K, Shirasaki H, Iwasa K, Yoshimoto A, Kita T, Fuzimura M, Nakao S. A phase II trial of biweekly administration of vinorelbine (V) and gemcitabine (G) in elderly patients (Pts) with advanced non-small cell lung cancer (NSCLC). J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.7331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- H. Kimura
- Kanazawa Lung Cancer Chemotherapy Group, Kanazawa-City, Japan
| | - K. Kasahara
- Kanazawa Lung Cancer Chemotherapy Group, Kanazawa-City, Japan
| | - K. Shibata
- Kanazawa Lung Cancer Chemotherapy Group, Kanazawa-City, Japan
| | - H. Shirasaki
- Kanazawa Lung Cancer Chemotherapy Group, Kanazawa-City, Japan
| | - K. Iwasa
- Kanazawa Lung Cancer Chemotherapy Group, Kanazawa-City, Japan
| | - A. Yoshimoto
- Kanazawa Lung Cancer Chemotherapy Group, Kanazawa-City, Japan
| | - T. Kita
- Kanazawa Lung Cancer Chemotherapy Group, Kanazawa-City, Japan
| | - M. Fuzimura
- Kanazawa Lung Cancer Chemotherapy Group, Kanazawa-City, Japan
| | - S. Nakao
- Kanazawa Lung Cancer Chemotherapy Group, Kanazawa-City, Japan
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Iwasa K, Kuribayashi A, Sugiura M, Nishiyama Y, Ichimaru M, Moriyasu M, Lee DU. Bioconversion studies in cultured cells of Corydalis species. Pharmazie 2004; 59:480-3. [PMID: 15248465] [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: 04/30/2023]
Abstract
Structural analysis of the metabolites of dopamine and salsolinol in cultured cells of Corydalis species was carried out using the combination of LC-MS and LC-NMR techniques. Metabolic pathways were clarified without the need to isolate the individual metabolites.
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Affiliation(s)
- K Iwasa
- Kobe Pharmaceutical University, Kobe, Japan.
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24
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Iwasa K, Moriyasu M, Tachibana Y, Kim HS, Wataya Y, Wiegrebe W, Bastow KF, Cosentino LM, Kozuka M, Lee KH. Simple isoquinoline and benzylisoquinoline alkaloids as potential antimicrobial, antimalarial, cytotoxic, and anti-HIV agents. Bioorg Med Chem 2001; 9:2871-84. [PMID: 11597468 DOI: 10.1016/s0968-0896(01)00154-7] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.1] [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] [Indexed: 10/27/2022]
Abstract
Twenty-six simple isoquinolines and 21 benzylisoquinolines were tested for antimicrobial, antimalarial, cytotoxic, and anti-HIV activities. Some simple isoquinoline alkaloids were significantly active in each assay, and may be useful as lead compounds for developing potential chemotherapeutic agents. These compounds include 13 (antimicrobial), 25, 26, and 42 (antimalarial), 13 and 25 (cytotoxic), and 28 and 29 (anti-HIV). A quaternary nitrogen atom of isoquinolium or dihydroisoquinolinium type may contribute to enhanced potency in the first three types of activities. In contrast, anti-HIV activity was found with tetrahydroisoquinoline and 6,7-dihydroxyisoquinolium salts.
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Affiliation(s)
- K Iwasa
- Kobe Pharmaceutical University, 4-19-1Motoyamakita, Higashinada-ku, 658-8558, Kobe, Japan
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25
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Abstract
In vitro cytotoxic activities of 24 quaternary protoberberine alkaloids related to berberine have been evaluated using a human cancer cell line panel coupled with a drug sensitivity database. Extending the alkyl chain at position 8 or 13 strongly influenced the cytotoxic activity, that is, relative lipophilicity as well as the size of the substituent affects cytotoxicity. The highest level of activity was observed in 8- or 13-hexyl-substituted derivatives of berberine. Structure-activity relationships are described.
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Affiliation(s)
- K Iwasa
- Kobe Pharmaceutical University, 4-19-1 Motoyamakita, Higashinada-ku, Kobe 658-8558, Japan.
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26
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Kohgi M, Iwasa K, Mignot JM, Fåk B, Gegenwart P, Lang M, Ochiai A, Aoki H, Suzuki T. Staggered field effect on the one-dimensional S = 1/2 antiferromagnet Yb4As3. Phys Rev Lett 2001; 86:2439-2442. [PMID: 11289949 DOI: 10.1103/physrevlett.86.2439] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2000] [Indexed: 05/23/2023]
Abstract
Inelastic neutron scattering measurements of magnetic excitations in the charge-ordered state of Yb4As3 have been performed under magnetic field up to about 6 T. By applying a magnetic field, the spectrum at the one-dimensional wave vector q = 1 [ pi/d] changes drastically from a broad one corresponding to the spinon excitation continuum of the one-dimensional S = 1 / 2 spin system to a sharp one at a finite energy, indicating the opening of an energy gap in the system. The magnetic field dependence of the gap is well fitted by the power law H2/3. The experimental result gives strong evidence for the existence of a staggered field alternating along Yb3+ chains induced by the Dzyaloshinsky-Moriya interaction.
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Affiliation(s)
- M Kohgi
- Department of Physics, Tokyo Metropolitain University, Hachioji, Japan
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27
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Abstract
The distribution patterns of the intensity of negative charge on the free surfaces (glycocalyx of the plasma membrane) of endothelial cells (ECs) in blood vessels and reticular cells (RCs) in the splenic cord of the rat spleen were studied by an electron microscopic cytochemical method using polyethyleneimine (PEI) as a cationic probe. Spleens from adult male rats were perfusion-fixed with 0.5% glutaraldehyde -4% paraformaldehyde containing 0.05% cetylpyridinium chloride and then perfused with 0.5% PEI at pH 7.4. On the free surfaces (glycocalyx of the plasma membrane) of the ECs examined, distinct PEI-positive reactions were observed in blood vessels, such as trabecular arteries, central arteries, arterial capillaries, pulp veins and trabecular veins. These PEI-positive electron-dense substances in the trabecular arteries, central arteries, and trabecular veins took the shape of a band of 170-250 nm in thickness. On the other hand, the corresponding ultrastructure of the ECs lining the splenic sinuses and the RCs in the splenic cord showed exceedingly weak PEI reactions. The PEI-reactive deposits were significantly thinner than those in the above blood vessels. As the thickness of the electron-dense substances can be related to the density of the negative charge, these results suggest that there is a high intensity of negative charge on the free surfaces (glycocalyx of the plasma membrane) of ECs in blood vessels where blood cells and plasma pass into the red pulp or are discharged from the red pulp. In contrast, the splenic sinuses and RCs, which are the main components of the red pulp, contain weakly negative-charged sites. This may contribute to the microcirculation of the splenic blood vessels and elucidate the possible physiological functions of the spleen, such as blood storage.
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Affiliation(s)
- H Ueda
- Department of Veterinary Anatomy, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
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28
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Honjo H, Kikuchi N, Hosoda T, Kariya K, Kinoshita Y, Iwasa K, Ohkubo T, Tanaka K, Tamura T, Urabe M, Kawata M. Alzheimer's disease and estrogen. J Steroid Biochem Mol Biol 2001; 76:227-30. [PMID: 11384881 DOI: 10.1016/s0960-0760(00)00152-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The preventive effect of estrogen on Alzheimer's disease (AD) has become clear with epidemiological data. Therapeutic effects of estrogen have not yet been established. In this presentation, we report our new basic and clinical data. The estrogen receptor, (ER)alpha, and ERbeta mRNA were investigated in rat brain. Estradiol-17beta (E(2)) treatment following OVX reduced the levels of ERalpha mRNA in the hypothalamus. In the substantia innominata (SI), the number of choline acetyltransferase immunoreacive cells increased significantly in the estrogen treatment rat. The neurons in SI projecting to the forebrain cortex contained ERalpha. Increasing amounts of intracellular calcium, peroxidation, and apoptosis with amyloid beta were suppressed in neuronal cells from rat pheochromocytoma (PC12) cells with E(2). ERalpha cDNA transfected PC 12 cells elaborated more neurite-like processes with E(2). In clinics, we are currently preparing vaginal progesterone tablets, which essentially may concentrate in the endometrium to prevent endometrial cancer, with few general circulation of progesterone inviting less depression. The therapeutic effects of cyclic estrogen, such as its preventive effect, are suggested in these studies, at least on mild AD.
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Affiliation(s)
- H Honjo
- Department of Gynecology, Kyoto Prefectural University of Medicine, Kawaramachi, Hirokoji, Kamikyo-ku 602-8566, Kyoto, Japan
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29
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Yamazaki S, Iwasa K, Kano K, Ikeda T, Taketomo N, Kaneko T. Ascorbate regeneration by the reduced form of 2-amino-3-carboxy-1, 4-naphthoquinone, a strong growth stimulator for bifidobacteria. J Agric Food Chem 2000; 48:5643-5648. [PMID: 11087532 DOI: 10.1021/jf000684u] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Nonenzymatic reduction of dehydroascorbate into ascorbate by the reduced form (quinol form) of 2-amino-3-carboxy-1,4-naphthoquinone, a strong growth stimulator for bifidobacteria, has been found. The bimolecular reaction rate constant was evaluated as 9 M(-)(1) s(-)(1) at pH 7.0. This reaction has been successfully coupled with enzymatic regeneration of the naphthoquinol by NAD(P)H in cell-free extracts of Bifidobacterium longum 6001. The overall reaction is a regeneration of NAD(P)(+) by dehydroascorbate [or a regeneration of ascorbate by NAD(P)H], in which the naphthoquinone/quinol redox couple functions as an electron transfer mediator. Kinetic study of the reduction of dehydroascorbate with related quinol compounds suggested the significance of the amino substituent of the naphthoquinol. A mechanism of the electron transfer from the quinol to dehydroascorbate is proposed, where the first step of the reaction is a nucleophilic addition of the C(2)-amino substituent of the naphthoquinol to the C(2)-position of dehydroascorbate to form a Schiff base intermediate.
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Affiliation(s)
- S Yamazaki
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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30
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Koyama J, Morita I, Kino A, Iwasa K, Tagahara K. Enantiomeric separation by cyclodextrin modified capillary zone electrophoresis (CD-CZE) of quaternary tetrahydroprotoberberine alkaloids. Chem Pharm Bull (Tokyo) 2000; 48:1790-2. [PMID: 11086917 DOI: 10.1248/cpb.48.1790] [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
A cyclodextrin modified capillary zone electrophoresis (CD-CZE) for the enantiomeric separation of tetrahydroprotoberberine N-metho salts was established. The resolution was optimized by changing the concentration of the electrolyte solution, hydroxypropyl-beta-CD (0.02 M, 0.07 M, or 0.14 M) or dimethyl-beta-CD (0.05 M or 0.15 M) in phosphate buffer (pH 2.5 or 3) containing 10% acetonitrile with an applied voltage of 20 kV. This method was applied toward the enantioselective bio-conversion of quaternary tetrahydroprotoberberine N-metho salts in cultured cells of Corydalis species.
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Affiliation(s)
- J Koyama
- Kobe Pharmaceutical University, Japan.
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31
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Maruyama W, Sango K, Iwasa K, Minami C, Dostert P, Kawai M, Moriyasu M, Naoi M. Dopaminergic neurotoxins, 6,7-dihydroxy-1-(3', 4'-dihydroxybenzyl)-isoquinolines, cause different types of cell death in SH-SY5Y cells: apoptosis was induced by oxidized papaverolines and necrosis by reduced tetrahydropapaverolines. Neurosci Lett 2000; 291:89-92. [PMID: 10978581 DOI: 10.1016/s0304-3940(00)01381-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [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: 01/27/2023]
Abstract
Dopamine-derived 6,7-dihydroxy-1-(3', 4'-dihydroxybenzyl)-isoquinolines, papaverolines and tetrahydropapaverolines, have been proposed to be neurotoxin candidates related to the pathogenesis of Parkinson's disease. In this paper, the cytotoxicity of papaverolines and their N-methyl derivatives was examined using human dopaminergic neuroblastoma SH-SY5Y cells as a model of dopamine neurons. Apoptotic and necrotic cell death were assessed by morphological observation of cells after staining with propidium iodide and Hoechst 33342. Papaveroline and N-methyl-papaveroline induced apoptosis in almost all the cells with typical features of condensed and fragmented nuclei. On the other hand, (R)- and (S)-tetrahydropapaveroline caused necrosis in cells. Tetrahydropapaverolines markedly reduced adenosine triphosphate (ATP) level, whereas papaverolines did not, suggesting that the types of cell death induced by these isoquinolines, necrosis and apoptosis, depend on ATP concentrations in the cells.
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Affiliation(s)
- W Maruyama
- Laboratory of Biochemistry and Metabolism, Department of Basic Gerontology, National Institute for Longevity Sciences, Obu, Aichi, Japan
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Abstract
The 23 quaternary and tertiary protoberberines related to berberine were tested for in vitro and/or in vivo fungicidal and herbicidal activities. Among the compounds tested, there was some activity observed with some of only the protoberberinium salts, but not sufficiently strong or broad spectrum for agrochemical use. From the structure-activity point of view, some features can be pointed out.
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Affiliation(s)
- K Iwasa
- Dow Argo Sciences LLC, Indianapolis, Indiana 46268, USA.
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33
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Sakajiri K, Iwasa K, Okino S, Takamori M. [Autosomal dominant adult-onset spinal muscular atrophy with vocal cord paralysis: a case report]. Rinsho Shinkeigaku 2000; 40:712-6. [PMID: 11186910] [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: 02/19/2023]
Abstract
This report concerns a 41-year-old female case of spinal muscular atrophy (SMA) associated with vocal cord paralysis. Her parents were not consanguineous. Her maternal grandmother and younger brother were suspected of having SMA. At age 37, she first experienced gait disturbance and began to have slowly progressive dysarthria and weakness of the extremities. Neurological examination revealed that she had inspiratory stridor, dysarthria and proximal muscular weakness of the extremities. Achilles tendon reflexes were absent, while there were no pathological reflexes or sensory disturbances. She showed a waddling gait and Gowers' sign. The laboratory data indicated mild elevation of serum CK. The nerve conduction study was normal, while the electromyographic study and muscle biopsy revealed neurogenic changes. We diagnosed the case as adult onset SMA of the autosomal dominant type. Laryngoscopy revealed that the patient had vocal cord paralysis, which was predominant in abductor muscles and of the posterior paralysis type according to the categories established by Isozaki. Genetic analysis showed no mutations in the genes of the neuronal apoptosis inhibitory protein and of the survival motor neuron.
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Affiliation(s)
- K Sakajiri
- Department of Neurology, Kanazawa University School of Medicine
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Okubo T, Urabe M, Tsuchiya H, Iwasa K, Yokota K, Kikuchi N, Yamamoto T, Honjo H. Effect of estrogen and progesterone on gene expression of growth regulatory molecules and proto-oncogene in vascular smooth muscle cells. Endocr J 2000; 47:205-14. [PMID: 11036862 DOI: 10.1507/endocrj.47.205] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We examined influences of estrogen and progestogen on gene expression of the growth regulatory molecules: platelet-derived growth factor (PDGF), interleukin-1 (IL-1), interleukin-6 (IL-6) and proto-oncogene c-myc in vascular smooth muscle cells (VSMC) by reverse transcription-polymerase chain reaction (RT-PCR) and Southern-blotting. VSMC were exposed to estrone-sulfate (E1-S) and medroxyprogesterone acetate (MPA) to induce differentiation. E1-S inhibited the expression of PDGF-A chain, IL-1, IL-6 and c-myc mRNA, whereas MPA had no effect. Inhibition by E1-S was not affected by treatment combined with MPA. These findings suggest that estrogen modulates these growth regulatory molecules and c-myc gene expression in VSMC but not progestogen. We concluded that estrogen may have a direct atheroprotective effect through inhibition of growth regulatory factors.
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Affiliation(s)
- T Okubo
- Department of Obstetrics and Gynecology, Kyoto Prefectural University of Medicine, Japan
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35
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Abstract
The complex carbohydrates in the camel duodenal glands were examined histochemically at light and electron microscopic levels. The duodenal glands of the camel were distributed in the submucosa 2 m caudal from the pylorus. These were branched tubuloalveolar glands. The terminal portion of each lobule was formed by only one type of mucous cell. The duodenal gland cells contained acidic and neutral carbohydrates. The mucous cells mainly contained sulfate and carboxyl carbohydrate with sialic acid, and they also contained a few neutral carbohydrates with different saccharide residues such as mannose, glucose, galactose, N-acetyl glucosamine and N-acetyl galactosamine. The results showed that the secretary granules of the duodenal glands in the camel contain mainly acidic carbohydrates. These findings seem to be the morphological characteristics of the duodenal glands in the camel.
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Affiliation(s)
- K Takehana
- Department of Veterinary Anatomy, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
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36
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Abstract
In the Lambert-Eaton myasthenic syndrome (LEMS), an autoimmune disease that is often associated with lung cancer and characterized by reduced quantal release of acetylcholine from the motor nerve terminal, our studies to search for the target of LEMS antibodies have brought the voltage-gated calcium channel (VGCC) into relief. Among multiple types of VGCCs, the P/Q-type was highly recognized by LEMS antibodies. Using synthetic peptides or recombinant proteins as antigens, the study specified the S5-S6 linker regions in 3 of 4 domains as immunodominant sites in the molecular structure of P/Q-type VGCC alpha1 subunit. Synaptotagmin, one of the functionally VGCC-associated synaptic proteins, was also found to be an immunogen in the pathogenesis of LEMS.
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Affiliation(s)
- M Takamori
- Neurological Center, Kanazawa-Nishi Hospital, Kanazawa, Japan
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37
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Abstract
The authors studied sera from 36 patients with Lambert-Eaton myasthenic syndrome (LEMS) by immunoblots using the recombinant protein derived from the DNA sequence encoding for the domain III S5-S6 linker of the P/Q-type voltage-gated calcium channel al subunit. The results of 18 patients were positive for antibodies to this recombinant protein. The results of 2 of 10 patients with lung cancer without LEMS were also positive.
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Affiliation(s)
- K Iwasa
- Department of Neurology, Kanazawa University School of Medicine, Japan
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38
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Kikuchi N, Urabe M, Iwasa K, Okubo T, Tsuchiya H, Hosoda T, Tatsumi H, Honjo H. Atheroprotective effect of estriol and estrone sulfate on human vascular smooth muscle cells. J Steroid Biochem Mol Biol 2000; 72:71-8. [PMID: 10731640 DOI: 10.1016/s0960-0760(99)00149-1] [Citation(s) in RCA: 20] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In patients with atherosclerosis, fibrosclerotic focuses are induced by multiplication of vascular smooth muscle cells (VSMC), and they are regulated by cytokines and regulators. There have been few reports about the atheroprotective effect of estriol (E(3)). Estrone sulfate (E(1)-S) is the predominant estrogen of conjugated equiline estrogens, which is commonly used in hormone replacement therapy, but it should be hydrolyzed by steroid sulfatase (STS) to enter the cells of target tissues. The purpose of this study was to detect STS in VSMC and to investigate whether E(3) and E(1)-S have atheroprotective effects like E(2). First, we detected the presence of STS mRNA in VSMC by in situ hybridization. We then examined the changes in the expression of mRNAs of cytokines, namely, PDGF-A chain, IL-1, IL-6 and TGF-beta, in VSMC, in the presence and absence of E(3) and estrogens. As a result, the expression of PDGF-A chain, IL-1 and IL-6 mRNAs was suppressed by E(3) (P<0.05 vs control) significantly like E(1)-S and E(2), but that of TGF-beta mRNA was not significantly affected by any estrogen. These results indicate that E(1)-S can be hydrolyzed by STS in VSMC, and that E(3) may regulate the cytokines by suppressing the production of mRNAs. It is suggested that there is a possibility of E(1)-S and E(3) having a direct effect on vessels in atherogenesis.
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MESH Headings
- Arteriosclerosis/enzymology
- Arteriosclerosis/prevention & control
- Arylsulfatases/genetics
- Arylsulfatases/metabolism
- Cell Line
- Estradiol/pharmacology
- Estriol/pharmacology
- Estriol/therapeutic use
- Estrone/analogs & derivatives
- Estrone/metabolism
- Estrone/pharmacology
- Estrone/therapeutic use
- Gene Expression Regulation/drug effects
- Humans
- In Situ Hybridization
- Interleukin-1/genetics
- Interleukin-6/genetics
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/enzymology
- Muscle, Smooth, Vascular/metabolism
- Platelet-Derived Growth Factor/genetics
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Steryl-Sulfatase
- Transforming Growth Factor beta/genetics
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Affiliation(s)
- N Kikuchi
- Department of Obstetrics and Gynecology, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, Japan.
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39
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Abstract
Light and electron microscopic studies were conducted on dermis samples taken from different regions of adult cows and pigs to determine whether there is a correlation between subfibrillar architecture and collagen fibril diameter in dermis tissue. Dermis thicknesses, collagen fibril diameters, subfibrillar architecture diameters, and angles of the helical arrangement of subfibrillar architectures were measured in all dermis samples. The results showed that the differences between subfibrillar architecture diameters in dermis samples from different regions of the same species were not significant and that the diameters of subfibrillar architectures in dermis samples were similar (22-28 nm) in the two species (cow and pig) examined in this study. These findings therefore suggest that the collagen fibril diameter depends on the number of subfibrillar architectures in each fibril.
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Affiliation(s)
- A Kobayashi
- Department of Veterinary Anatomy, School of Veterinary Medicine, Rakuno Gakuen University, Hokkaido, Japan
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40
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Abstract
The Lambert-Eaton myasthenic syndrome (LEMS) is a disorder of neuromuscular transmission characterized by the reduced quantal release of acetylcholine from the motor nerve terminal, wherein the P/Q-type of voltage-gated calcium channel (VGCC) and is attacked by a majority of LEMS antibodies. Using the molecular structure of the alpha1 subunit (consisting of 4 domains) of the P/Q-type VGCC as a reference, we synthesized the extracellular region (S5-S6 linker) of the domain III, known as the segment which plays an important role in channel functions. Six of the ten Lewis rats immunized with this synthetic peptide conjugated with carrier protein showed moderate weakness (grade 1 in a 3-graded scale, for myasthenic weakness in experimental animals) and a reduction in acetylcholine quantum content of end-plate potentials. Antipeptide antibodies raised in test rats reacted with omega-conotoxin MVIIC-sensitive cerebellar extract (P/Q-type VGCC) and the domain III peptide inhibited the binding of rat antibodies to VGCCs. Our findings suggest the identification of one of the potential epitopes of LEMS antibodies.
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Affiliation(s)
- K Komai
- Department of Neurology, Kanazawa University School of Medicine, Japan
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41
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Fujimura M, Kasahara K, Shirasaki H, Heki U, Iwasa K, Ueda A, Matsuda T. Up-regulation of ICH-1L protein by thromboxane A2 antagonists enhances cisplatin-induced apoptosis in non-small-cell lung-cancer cell lines. J Cancer Res Clin Oncol 1999; 125:389-94. [PMID: 10394958 DOI: 10.1007/s004320050291] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We evaluated the effect of thromboxane A2 (TXA2) blockade on cisplatin-induced apoptosis in non-small-cell lung cancer (NSCLC) cell lines. Cisplatin induced apoptosis in PC/9 and PC-9/CDDP in a dose-dependent manner. Treatment with specific TXA2 antagonist, calcium 5(Z)-1R,2S,3S,4S-7-[3-phenylsulfonylaminobicyclo[2,2,1]hept-2-yl]- 5-heptonoate hydrate (S-1452) and 5(Z-6-[(1R,2R,3R,4S)-3-(N-4-bromobenzenesulfonyl aminomethyl) bicyclo[2,2,1]heptane-2-yl]-hex-5-enoic acid (ONO-NT-126), enhanced the cisplatin-induced apoptosis in each cell line. Acetyl-L-aspartyl-glutamyl-valyl-aspart-1-aldehyde (Ac-DEVD-CHO) inhibited cisplatin-induced apoptosis and enhancement of the apoptosis by TXA2 blockade, but acetyl-L-tyrosyl-valyl-alanyl-aspart-1-aldehyde (Ac-YVAD-CHO) had no effect on the apoptosis. There was no difference in the interleukin-1beta-converting enzyme (ICE) protease protein expression in either cell line. Cysteine protease p32(CPP32) protein expression was lower in PC-9/CDDP but was not changed by S-1452, cisplatin, or cotreatment with cisplatin and S-1452. Ice and Ced-3 homolog (ICH-1L) expression was significantly lower in PC-9/CDDP and was up-regulated by S-1452 or ONO-NT-126. These data suggest that ICH-1L might play a critical role in cisplatin-induced apoptosis and that TXA2 blockade up-regulates ICH-1L protein expression. Overexpression of ICH-1L and treatment with cisplatin might result in an increase in apoptosis in NSCLC cell lines.
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Affiliation(s)
- M Fujimura
- The Third Department of Internal Medicine, Kanazawa University School of Medicine, Japan
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42
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Fujimura M, Myou S, Kamio Y, Ishiura Y, Iwasa K, Hashimoto T, Matsuda T. Increased airway responsiveness to acetaldehyde in asthmatic subjects with alcohol-induced bronchoconstriction. Eur Respir J 1999; 14:19-22. [PMID: 10489823 DOI: 10.1034/j.1399-3003.1999.14a05.x] [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
Bronchial responsiveness to acetaldehyde, a main factor in alcohol-induced bronchoconstriction, and methacholine were compared between 10 subjects with alcohol-induced bronchoconstriction and 16 asthmatic subjects without alcohol sensitivity. In the alcohol-sensitive group, the geometric mean (geometric SEM (GSEM)) of the provocative concentration of methacholine (PC20,meth) and acetaldehyde (PC20,acet) causing a 20% fall in forced expiratory volume in one second were 0.947 mg x mL(-1) (GSEM 0.139) and 21.0 mg x mL(-1) (GSEM 0.112), respectively, which were not significantly different from those in the nonalcohol-sensitive group, which were 0.634 mg x mL(-1) (GSEM 0.115) and 31.7 mg x mL(-1) (GSEM 0.077), respectively. The ratio of airway responsiveness to acetaldehyde relative to methacholine (log PC20,acet/PC20,meth) was 1.345+/-0.093 (mean+/-SEM) in the alcohol-sensitive group, which was significantly different from the value of 1.699+/-0.059 in the nonalcohol-sensitive group (p=0.0025). A significant correlation was observed between PC20,meth and PC20,acet in both the alcohol-sensitive group (r=-0.742, p=0.0115) and nonsensitive group (r=0.882, p<0.0001). In conclusion, the airways of asthmatic subjects with alcohol-induced bronchoconstriction have a selective hyperresponsiveness to acetaldehyde.
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Affiliation(s)
- M Fujimura
- The Third Dept of Internal Medicine, Kanazawa University School of Medicine, Takara-machi, Japan
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43
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Muranishi T, Takehana K, Hiratsuka T, Kobayashi A, Iwasa K, Abe M. An investigation of the relationship between duct system and A cell-rich and PP cell-rich pancreatic islets in the canine pancreas. J Vet Med Sci 1999; 61:737-42. [PMID: 10458094 DOI: 10.1292/jvms.61.737] [Citation(s) in RCA: 6] [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
The pancreata of four six-month-old dogs of the same mother, two with both the pancreatic and accessory pancreatic ducts (X-type) and two with only the accessory pancreatic duct (Y-type), were examined in this study. To clarify the relationships between the type of pancreatic duct system and the composition of pancreatic endocrine cells, the pancreata were examined immunohistochemically using antiserum against four types of pancreatic hormones (glucagon, insulin, somatostatin and pancreatic polypeptide). In all areas of the X- and Y-type duct system pancreata, B cells accounted for 52-82% of the total number of islet cells, and D cells accounted for 4-15%. In the X-type ducts system, the percentages of A and PP cells in the right and left lobes of the pancreas differed greatly. It was found that A and PP cells appear in inverse proportion to each other and that there exist A cell-rich and PP cell-rich pancreatic islets. The A cell-rich pancreatic islets appeared in the left lobes along the accessory pancreatic duct, while the PP cell-rich pancreatic islets were observed in the right lobes along the pancreatic duct. The body of the pancreas contained both A cell-rich and PP cell-rich pancreatic islets. In the Y-type duct systems, A cell-rich pancreatic islets appeared in the right lobes. These findings indicate that the composition of A and PP cells in pancreatic islets is closely related to the type of duct system.
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Affiliation(s)
- T Muranishi
- Department of Veterinary Anatomy, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
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44
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Takehana K, Kobayashi A, Cao GF, Andrén A, Iwasa K, Abe M. Morphological characterization of gland cells of the glandular sac area in the complex stomach of the Bactrian camel (Camelus bactrianus). Anat Histol Embryol 1999; 28:183-91. [PMID: 10458024 DOI: 10.1046/j.1439-0264.1999.00185.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The morphology of the gland cells in the glandular sac area of the Bactrian camel and the composition of secretory substances were examined by histochemical methods. It was found that the gland cells of the glandular sac area were of the same type and size as those of the cardiac glands. The composition of secretory substances from the glandular sac area was the same as that of secretory substances from the cardiac glands. Moreover, secretory substances from the gland cells of the glandular sac area contained a great deal of acid glycoconjugates, such as sialic acid, in addition to neutral saccharides (fucose, mannose, glucose, N-acetyl-D-glucosamin, galactose and N-acetyl-galactosamin). Furthermore, immunohistochemical examination showed that progastricsin was present in the gland cells of the glandular sac area and the cardiac gland. In this study, histological analysis suggested that the stomach of the Bactrian camel is a single cavity stomach, formed as a result of multiple differentiation and growth of cardiac glands through the process of evolution.
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45
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Iwasa K, Oomori Y, Tanaka H. Colocalization of gamma-aminobutyric acid immunoreactivity and acetylcholinesterase activity in nerve fibers of the mouse adrenal gland. J Vet Med Sci 1999; 61:631-5. [PMID: 10423684 DOI: 10.1292/jvms.61.631] [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: 11/22/2022] Open
Abstract
The present immunohistochemical and enzyme histochemical study showed gamma-aminobutyric acid (GABA) immunoreactivity and acetylcholinesterase (AChE) activity in the mouse adrenal gland. Weak GABA immunoreactivity was seen in clusters of chromaffin cells showing noradrenaline fluorescence. This finding suggests that both GABA and noradrenaline may be released from the granules of noradrenaline cells by adequate stimuli. GABA-immunoreactive varicose nerve fibers densely contacted adrenaline cells and large ganglion cells, but they were sparse in the periphery of clusters of noradrenaline cells. AChE activity was strong in a few large ganglion cells and weak in chromaffin cells showing noradrenaline fluorescence, and was found in numerous nerve bundles and fibers of the medulla. AChE-active nerve fibers more densely contacted noradrenaline cells than adrenaline cells. By using double labeling technique, numerous GABA-immunoreactive nerve fibers in the medulla were reactive for AChE in the same sections. These results suggest that both GABA and acetylcholine may be colocalized in the intra-adrenal nerve fibers and may have some secretory effects on the chromaffin cells.
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Affiliation(s)
- K Iwasa
- Department of Veterinary Anatomy, Faculty of Veterinary Medicine, Rakuno Gakuen University, Hokkaido, Japan
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46
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Iwasa K, Oomori Y, Tanaka H. Acetylcholinesterase activity, and neurofilament protein, and catecholamine synthesizing enzymes immunoreactivities in the mouse adrenal gland during postnatal development. J Vet Med Sci 1999; 61:621-9. [PMID: 10423683 DOI: 10.1292/jvms.61.621] [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: 11/22/2022] Open
Abstract
The present study showed the acetylcholinesterase (AChE) activity, and neurofilament protein (NFP), catecholamine-synthesizing enzymes, dopamine beta-hydroxylase (DBH) and phenylethanolamine N-methyltransferase (PNMT) immunoreactivities in the mouse adrenal gland during postnatal development. From birth to postnatal-1-day, AChE activity was weakly and diffusely found in some medullary cells and in very few nerve fibers whereas strong NFP immunoreactivity was seen in a few ganglion cells and in remarkably numerous nerve fibers in the medulla. Almost all meduallary cells were reactive for both DBH and PNMT during this period. From postnatal-2- or -3-day to postnatal-1-week, strong AChE activity was observed in a few large ganglion cells, but the reaction was weak in clusters of chromaffin cells, and the number of strong AChE-active nerve fibers in the medulla was rapidly increased. From postnatal-2-day onwards, the number of NFP-immunoreactive nerve fibers in the medulla were remarkably numerous. Numerous chromaffin cells were reactive for both DBH and PNMT whereas some chromaffin cells were reactive for only DBH from postnatal-2-day onwards. These results suggest that drastic changes such as an increase of acetylcholine in the nerve fibers, differentiation of noradrenaline and adrenaline cells of the medulla may occur during this period. From postnatal-2-week to postnatal-3-week, weak AChE activity was seen in the clusters of several chromaffin cells and a few ganglion cells, and the number of AChE-active nerve fibers in the medulla was gradually increased. From postnatal-4-week to postnatal-8-week (adult), the distribution and frequency of AChE activity in the adrenal gland were similar to those at postnatal-3-week. In the adult, AChE activity was weakly seen in the clusters of several chromaffin cells showing noradrenaline fluorescence in the adrenal medulla. The noradrenaline cells were contacted by denser AChE-reactive nerve fibers than adrenaline cells. These results suggest that the development of cholinergic nervous system in the mouse adrenal medulla may be completed by postnatal-3-week.
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Affiliation(s)
- K Iwasa
- Department of Veterinary Anatomy, Faculty of Veterinary Medicine, Rakuno Gakuen University, Hokkaido, Japan
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Abstract
We describe a patient who presented with the clinicopathological features of corticobasal degeneration (CBD). Over the course of 8 years, the patient developed myoclonus, dystonia, and supranuclear gaze palsy associated with an akinetic-rigid syndrome. To our knowledge, no previous report of a patient with CBD has described clear-cut regional white matter changes as revealed by magnetic resonance imaging (MRI) scans. In our patient, a T2-weighted MR image of the brain showed focal atrophy of the bilateral frontal cortex and asymmetric regional hyperintensities of the subjacent white matter. These signal changes seemed to primarily reflect the progression of neuronal degeneration, especially the demyelination secondary to axonal loss or change.
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Affiliation(s)
- T Doi
- Department of Neurology, Tokyo Metropolitan Geriatric Hospital, Japan
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Abstract
13-Alkyl derivatives (2-6 and 8-12) of berberine (1) and palmatine (7) were subjected to in vitro antibacterial activity tests against Bacillus subtilis and Salmonella enteritidis. Antibacterial activity increased as the length of the C-13 aliphatic side chain increased. The effects of the oxygen-substituents on aromatic rings A, C, and D of protoberberinium salts 13-20 on the antimicrobial activity against Staphylococcus aureus, B. subtilis, S. enteritidis, Escherichia coli, and Candida albicans are also discussed. The change in lipophilicity of the protoberberinium salts caused by modification of the substituents appears to influence the antibacterial activity. 13-Hexylberberine (6) and 13-hexylpalmatine (12) exhibited the greatest antibacterial activity.
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Abstract
The mechanism of muscle weakness in myasthenia gravis and its possible relation to antibodies that are directed against the ryanodine receptor (RyR) were studied by the use of the spontaneous thymoma rat (Buffalo/Mna strain). The present study focused on the motor dysfunction as complicated by impaired subcellular machineries and noted particularly in patients with thymus abnormalities. Rats began to develop skeletal muscle weakness soon after birth and worsened progressively. Rats aged 3 months showed a benign thymoma characterized by proliferative lymphocytes; epithelial cells were stained with anti-RyR peptide antibody. The rat serum contained anti-RyR antibodies, but no anti-acetylcholine receptor antibodies. The electrophysiological study in muscle showed a reduction of contractile force without abnormality in synaptic transmission and membrane properties, suggesting a defect in excitation-contraction coupling. Hypothetically, thymic epithelial cells and skeletal muscles share a common RyR antigen, so that anti-RyR antibodies that target the thymic tissue may react with a homologous target in the muscle.
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Affiliation(s)
- K Iwasa
- Department of Neurology, Kanazawa University School of Medicine, Japan
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Iwasa K, Oomori Y, Tanaka H. Gamma aminobutyric acid immunoreactivity in the mouse adrenal gland during postnatal development. Arch Histol Cytol 1998; 61:373-82. [PMID: 9862152 DOI: 10.1679/aohc.61.373] [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] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
To understand the developing processes of gamma-aminobutyric acid (GABA)-containing chromaffin cells and nerve fibers in the mouse adrenal gland, we examined the tissues in various postnatal stages by immunohistochemistry using a GABA antibody. From birth until postnatal week 1, GABA-immunoreactivity was seen in very few nerve fibers, and in none of the chromaffin cells. At postnatal week 2, GABA-immunoreactivity appeared weakly in clusters of chromaffin cells and strongly in relatively numerous varicose nerve fibers. The immunoreactive nerve fibers were densely distributed in the small immunonegative chromaffin cells and large ganglion cells, but only sparsely so in the weak immunoreactive chromaffin cells. At postnatal week 3, the number of the immunoreactive chromaffin cells and nerve fibers further increased compared to that at postnatal week 2. The staining pattern of GABA-immunoreactive nerve fibers in the medullas was similar to that at postnatal week 2. From postnatal week 4 until postnatal week 8, the distribution and frequency of the immunoreactive chromaffin cells and nerve fibers were also similar to those at postnatal week 3. These results suggest that the expression of GABA in the chromaffin cells and in the nerve fibers of the mouse adrenal gland may be completed by postnatal week 3.
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Affiliation(s)
- K Iwasa
- Department of Veterinary Anatomy, Faculty of Veterinary Medicine, Rakumo Gakuen University, Ebetsu, Japan
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