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Takimoto S, Nishikawa B, Matsuo M, Hinata S, Hisatomi T, Yamagami A, Nakano T, Nakagawa Y, Miyagawa H. Structure modification of nonsteroidal brassinolide-like compound, NSBR1. Biosci Biotechnol Biochem 2022; 86:1004-1012. [PMID: 35687006 DOI: 10.1093/bbb/zbac074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 05/12/2022] [Indexed: 11/14/2022]
Abstract
Brassinolide (BL) is a possible plant growth regulator in agriculture, but the presence of a steroid skeleton hampers the field application of BL in agriculture because of its high synthetic cost. We discovered NSBR1 as the first nonsteroidal BL-like compound using in silico technology. Searching for more potent BL-like compounds, we modified the structure of NSBR1 with respect to two benzene rings and the piperazine ring. The activity of synthesized compounds was measured in Arabidopsis hypocotyl elongation. The propyl group of butyryl moiety of NSBR1 was changed to various alkyl groups, such as straight, branched, and cyclic alkyl chains. Another substituent, F, at the ortho-position of the B-ring toward the piperazine ring was changed to other substituents. A methyl group was introduced to the piperazine ring. Most of the newly synthesized compounds with the 3,4-(OH)2 group at the A-ring significantly elongated the hypocotyl of Arabidopsis.
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Affiliation(s)
- Seisuke Takimoto
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan.,Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka, Japan
| | - Bunta Nishikawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Midori Matsuo
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Shiori Hinata
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Taiki Hisatomi
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Ayumi Yamagami
- Graduate School of Biostudies, Kyoto University, Kyoto, Japan
| | - Takeshi Nakano
- Graduate School of Biostudies, Kyoto University, Kyoto, Japan
| | - Yoshiaki Nakagawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Hisashi Miyagawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
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2
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Esaki T, Kumazawa K, Takahashi K, Watanabe R, Masuda T, Watanabe H, Shimizu Y, Okada A, Takimoto S, Shimada T, Ikeda K. Open Innovation Platform using Cloud-based Applications and Collaborative Space: A Case Study of Solubility Prediction Model Development. CBIJ 2020. [DOI: 10.1273/cbij.20.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Tsuyoshi Esaki
- The Center for Data Science Education and Research, Shiga University
| | - Keiko Kumazawa
- Pharmaceutical Discovery Research Laboratories, Teijin Pharma Limited
| | - Kazutoshi Takahashi
- Research Institute for Bioscience Products and Fine Chemicals, Ajinomoto Co. Inc
| | - Reiko Watanabe
- Laboratory of Bioinformatics, AI Center for Health and Biomedical Research, National Institutes of Biomedical Innovation, Health and Nutrition
| | | | - Hirofumi Watanabe
- Education Center on Computational Science and Engineering, Kobe University
| | - Yugo Shimizu
- Division of Physics for Life Functions, Keio University Faculty of Pharmacy
| | - Akitoshi Okada
- Central Pharmaceutical Research Institute Takatsuki Research Center, Japan Tobacco Inc
| | - Seisuke Takimoto
- Central Pharmaceutical Research Institute Takatsuki Research Center, Japan Tobacco Inc
| | - Tomohiro Shimada
- Administration Department, Planning & amp; Control Division, Teijin Pharma Limited
| | - Kazuyoshi Ikeda
- Division of Physics for Life Functions, Keio University Faculty of Pharmacy
- Center for Life Science Technologies, RIKEN
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3
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Adeleye A, Takimoto S, Cruz K, Pasch L, Huddleston H. A randomized double blind clinical trial: building confidence during ovarian stimulation through the love study. Fertil Steril 2018. [DOI: 10.1016/j.fertnstert.2018.07.590] [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: 10/28/2022]
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4
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Sugiura A, Horoiwa S, Aoki T, Takimoto S, Yamagami A, Nakano T, Nakagawa Y, Miyagawa H. Discovery of a nonsteroidal brassinolide-like compound, NSBR1. J Pestic Sci 2017; 42:105-111. [PMID: 30363863 PMCID: PMC6183351 DOI: 10.1584/jpestics.d17-035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 06/22/2017] [Indexed: 05/13/2023]
Abstract
Fourteen compounds screened from 5 million compounds in silico were submitted to bioassay to find brassinolide (BL) agonists/antagonists against Arabidopsis thaliana. Of these, two N-benzoyl-N'-phenylpiperazine (NBNPP)-type compounds showed antagonistic activity; however, none showed agonistic activity against A. thaliana. The substituents at the benzoyl moiety of NBNPP were changed to OH groups to derive N-(3,4-dihydroxybenzoyl)-N'-(4-butanoyl-2-fluorophenyl)pyrazine, which was named NSBR1. NSBR1 was rationally designed based on docking simulations and molecular dynamics. NSBR1 significantly suppressed the gene expression of CPD and BR6-ox2, which are known as marker genes for the action of BL. This novel NSBR1 was also effective in the rice lamina inclination assay (RLIA), and the activity in terms of the 50% effective dose (ED50) was determined as 0.79 nmol/plant from the dose-response curve for RLIA.
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Affiliation(s)
- Airi Sugiura
- Graduate School of Agriculture, Kyoto University, Kyoto 606–8502, Japan
| | - Shinri Horoiwa
- Graduate School of Agriculture, Kyoto University, Kyoto 606–8502, Japan
| | - Takanori Aoki
- Graduate School of Agriculture, Kyoto University, Kyoto 606–8502, Japan
| | - Seisuke Takimoto
- Graduate School of Agriculture, Kyoto University, Kyoto 606–8502, Japan
| | - Ayumi Yamagami
- Gene Discovery Research Group, RIKEN Center for Sustainable Resource Science, Wako, Saitama 351–0198, Japan
- CREST, JST (Japan Science and Technology Agency), Kawaguchi, Saitama 332–0012, Japan
| | - Takeshi Nakano
- Gene Discovery Research Group, RIKEN Center for Sustainable Resource Science, Wako, Saitama 351–0198, Japan
- CREST, JST (Japan Science and Technology Agency), Kawaguchi, Saitama 332–0012, Japan
| | - Yoshiaki Nakagawa
- Graduate School of Agriculture, Kyoto University, Kyoto 606–8502, Japan
| | - Hisashi Miyagawa
- Graduate School of Agriculture, Kyoto University, Kyoto 606–8502, Japan
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5
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Hirao S, Masumoto H, Hoshino M, Minakata K, Takimoto S, Ikeda T, Yamashita J, Yagi N, Minatoya K. P3352Three-dimensional histological analysis of cardiac tissue in experimental small animals by synchrotron radiation-based X-ray phase-contrast imaging at SPring-8. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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6
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Takimoto S, Sugiura A, Minami S, Tasaka T, Nakagawa Y, Miyagawa H. In silico exploration for agonists/antagonists of brassinolide. Bioorg Med Chem Lett 2016; 26:1709-14. [PMID: 26935445 DOI: 10.1016/j.bmcl.2016.02.054] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 02/17/2016] [Accepted: 02/19/2016] [Indexed: 11/26/2022]
Abstract
Brassinolide (BL) is a plant steroid hormone that is necessary for stem elongation and cell division. To date more than 70 steroidal BL-like compounds, which are collectively named as brassinosteroids, have been identified. However, non-steroidal compounds that mimic BL have not been reported yet, which can be used as plant growth regulators. Twenty-two non-steroidal compounds were screened from the database containing about 5 million compound structures using a pharmacophore-based in silico screening method. The crystal structure (PDB: 4LSX) of the BL receptor was used to generate a pharmacophore model required for in silico screening. Among 22 hit compounds, 15 compounds that are thought to be physicochemically acceptable were submitted to the in vivo rice lamina inclination assay. Although no compound showed BL like activity, three compounds were detected as BL antagonist. The most potent compound was an ester derivative of 1,4-diphenlenedimethanol and isoxazole-4-carboxylic acid, and the other two compounds contain 2-phenylfuran and pyrimidin-2(1H)-one moieties bridged by an ethenyl substructure. The 50% effective doses (ED50) for the antagonistic activity were in a range of 0.6-5nmol per plant. The inhibition of the lamina inclination by the most potent agonist was recovered by the co-application of BL in a dose-dependent manner.
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Affiliation(s)
- Seisuke Takimoto
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Airi Sugiura
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Saki Minami
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | | | - Yoshiaki Nakagawa
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan.
| | - Hisashi Miyagawa
- Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
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7
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Abe S, Takimoto S, Yamamuro Y, Tau K, Takenaga F, Suzuki K, Oda M. High-Pressure and Heat Pretreatment Effects on Rehydration and Quality of Sweet Potato. ACTA ACUST UNITED AC 2010. [DOI: 10.3923/ajft.2011.63.71] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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8
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Keysar S, Anderson R, Takimoto S, Tan A, Deyneko I, McGovern K, Ross RW, Song J, Jimeno A. Combined hedgehog and epidermal growth factor receptor (EGFR) inhibition in a direct patient tumor model (DPTM) of head and neck squamous cell cancer (HNSCC). J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.5558] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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9
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Jo M, Thomas KS, Takimoto S, Gaultier A, Hsieh EH, Lester RD, Gonias SL. Urokinase receptor primes cells to proliferate in response to epidermal growth factor. Oncogene 2006; 26:2585-94. [PMID: 17043637 DOI: 10.1038/sj.onc.1210066] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Epidermal growth factor (EGF) expresses mitogenic activity by a mechanism that requires the EGF receptor (EGFR). We report that murine embryonic fibroblasts (MEFs) proliferate in response to EGF only when these cells express the urokinase receptor (uPAR). EGFR expression was equivalent in uPAR-/- and uPAR+/+ MEFs. In response to EGF, these cells demonstrated equivalent overall EGFR tyrosine phosphorylation and ERK/MAP kinase activation; however, phosphorylation of Tyr-845 in the EGFR, which has been implicated in cell growth, was substantially decreased in uPAR-/- MEFs. STAT5b activation also was decreased. As Tyr-845 is a c-Src target, we overexpressed c-Src in uPAR-/- MEFs and rescued EGF mitogenic activity. Rescue also was achieved by expressing murine but not human uPAR, suggesting a role for autocrine uPAR cell-signaling. In MDA-MB 231 breast cancer cells, EGF mitogenic activity was blocked by uPAR gene silencing, with antibodies that block uPA-binding to uPAR, and with a synthetic peptide that disrupts uPAR-dependent cell signaling. Again, c-Src overexpression rescued the mitogenic activity of EGF. We conclude that uPAR-dependent cell-signaling may prime cells to proliferate in response to EGF by promoting Tyr-845 phosphorylation and STAT5b activation. The importance of this pathway depends on the c-Src level in the cell.
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Affiliation(s)
- M Jo
- Department of Pathology, University of California San Diego, La Jolla, CA, USA
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10
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Katz M, Bouvet M, Takimoto S, Spivack D, Moossa A, Hoffman RM. Survival efficacy of adjuvant cytosine-analog CS-682 in a fluorescent orthotopic model of human pancreatic cancer. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.2077] [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)
- M. Katz
- University of California, San Diego, CA; AntiCancer, Inc., San Diego, CA
| | - M. Bouvet
- University of California, San Diego, CA; AntiCancer, Inc., San Diego, CA
| | - S. Takimoto
- University of California, San Diego, CA; AntiCancer, Inc., San Diego, CA
| | - D. Spivack
- University of California, San Diego, CA; AntiCancer, Inc., San Diego, CA
| | - A. Moossa
- University of California, San Diego, CA; AntiCancer, Inc., San Diego, CA
| | - R. M. Hoffman
- University of California, San Diego, CA; AntiCancer, Inc., San Diego, CA
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11
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de Paiva TM, Ishida MA, Hanashiro KA, Scolaro RM, Gonçalves MG, Benega MA, Oliveira MA, Cruz AS, Takimoto S. Outbreak of influenza type A (H1N1) in Iporanga, São Paulo State, Brazil. Rev Inst Med Trop Sao Paulo 2001; 43:311-5. [PMID: 11781599 DOI: 10.1590/s0036-46652001000600002] [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] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
From June to July 1999 an outbreak of acute respiratory illness occurred in the town of Iporanga. Out of a total of 4,837 inhabitants, 324 cases were notified to the Regional Surveillance Service. Influenza virus was isolated from 57.1% of the collected samples and 100% seroconversion to influenza A (H1N1) was obtained in 20 paired sera tested. The isolates were related to the A/Bayern/07/95 strain (H1N1). The percentages of cases notified during the outbreak were 28.4%, 29.0%, 20.7%, 6.2% and 15.7% in the age groups of 0-4, 5-9, 10-14, 15-19 and older than 20 years, respectively. The highest proportion of positives was observed among children younger than 14 years and no cases were notified in people older than 65 years, none of whom had been recently vaccinated against influenza. These findings suggest a significant vaccine protection against A/Bayern/7/95, the H1 component included in the 1997-98 influenza vaccine for elderly people. This viral strain is antigenically and genetically related to A/Beijing/262/95, the H1 component of the 1999 vaccine. Vaccines containing A/Beijing/262/95 (H1N1) stimulated post-immunization hemagglutination inhibition antibodies equivalent in frequency and titre to both A/Beijing/262/95-like and A/Bayern/7/95-like viruses. Thus, this investigation demonstrates the effectiveness of vaccination against influenza virus in the elderly.
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Affiliation(s)
- T M de Paiva
- Laboratório de Vírus Respiratórios, Serviço de Virologia, Instituto Adolfo Lutz, São Paulo, SP, 01246-902, Brasil.
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12
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Paiva TM, Ishida MA, Forléo-Neto E, Toniolo-Neto J, Gonçalvez MG, Benega MA, Halker E, Cruz AS, Takimoto S. Epidemiological study of Influenza virus in Brazil from 1996-1998. VR&R 2000. [DOI: 10.17525/vrrjournal.v5i1.178] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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13
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Kobayashi K, Takimoto S, Osawa Z. Crosslinking effects on the release force of addition cure silicone release agents in model systems. Polym Bull (Berl) 1998. [DOI: 10.1007/s002890050335] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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14
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Souza DF, Kisielius JJ, Ueda M, Gabbay YB, Carmona RC, St Timenetsky MDC, Mascarenhas JD, Takimoto S, Tanaka H. An outbreak of group C rotavirus gastroenteritis among adults living in Valentim Gentil, São Paulo State, Brazil. J Diarrhoeal Dis Res 1998; 16:59-65. [PMID: 9805410] [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: 02/09/2023]
Abstract
An outbreak of gastroenteritis affecting adults and children occurred in the small city of Valentim Gentil, São Paulo, Brazil, in 1993. Nineteen faecal samples (from 10 cases and 9 contracts) were examined by direct electron microscopy (DEM), immune electron microscopy (IEM), polyacrylamide gel electrophoresis (PAGE), and enzyme-linked immunosorbent assay (ELISA) for group A and C rotaviruses. DEM detected rotavirus in 6 of the 10 cases and in none of the contacts. All of the samples were negative for group A rotavirus by ELISA. Analysis by PAGE showed an electrophoretic profile suggestive of group C rotavirus in two cases. Group C rotavirus was identified by IEM in 4 of the cases and in 1 of the contacts. All of the samples were submitted to ELISA for group C rotavirus. This resulted in a total of 10 positives-7 for diarrhoeal cases and 3 for contacts. This outbreak was strongly associated with group C rotavirus. The importance of combining different diagnostic methods is emphasised.
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Affiliation(s)
- D F Souza
- Instituto Adolfo Lutz, São Paulo-SP, Brazil
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15
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Takimoto S, Waldman EA, Moreira RC, Kok F, Pinheiro FDP, Saes SG, Hatch M, de Souza DF, Carmona RDC, Shout D, de Moraes JC, Costa AM. Enterovirus 71 infection and acute neurological disease among children in Brazil (1988-1990). Trans R Soc Trop Med Hyg 1998; 92:25-8. [PMID: 9692141 DOI: 10.1016/s0035-9203(98)90939-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Surveillance for Enterovirus 71 (EV-71) infection in children up to 15 years of age was carried out in Brazil, from 1988 to 1990. Patients with acute neurological diseases (AND) such as flaccid paralysis, Bell's palsy, acute cerebellar ataxia and Guillain-Barré syndrome were included in the study. EV-71 infection was detected in 24 of 426 children (5.6%) with AND. EV-71 infection was confirmed only by virus isolation in 13 children, by virus isolation and seroconversion in 4, and by seroconversion alone in 7. EV-71 was also isolated from 15 of the 427 household contacts (3.5%) of 165 AND patients. There was some evidence of high infectivity of EV-71: household clusters were detected in the case of 7 of 24 children (29.1%) infected with EV-71 and manifesting AND; EV-71 was isolated from 11/40 household contacts (27.5%) of the infected patients but from only 4/387 household contacts (1.0%) of children in whom it was not possible to demonstrate EV-71 infection. Seven of the 24 children infected with EV-71 exhibited residual motor deficiency when examined 6 months after the disease onset. The relevance of these results for the Plan for Global Eradication of Wild Poliovirus is discussed, as well as the need to increase knowledge about the behaviour of this virus and its possible association with AND.
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Affiliation(s)
- S Takimoto
- Department of Virology, Instituto Adolfo Lutz, São Paulo, Brazil
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16
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Barata RDC, Waldman EA, de Moraes JC, Guibu IA, Rosov T, Takimoto S. [Gastroenteritis and acute respiratory infections among children under 5 years old in an area of southeastern Brazil, 1986-1987. I--Acute respiratory infections]. Rev Saude Publica 1996; 30:553-63. [PMID: 9302826 DOI: 10.1590/s0034-89101996000600010] [Citation(s) in RCA: 11] [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: 02/05/2023] Open
Abstract
A probabilistic sample of children up to 5 years old was studied (n = 468). The epidemiological survey was carried out in five areas in the municipality of S. Paulo (Brazil), from March 1986 to May 1987. Data were obtained through household interviews once a month during one year. Some of the most relevant socioeconomic characteristics of the children's families are: low family income "per capita"; 29.3% of the parents were migrants with a mean period of residence in S. Paulo city of 18.6 years; 40% of the families had access exclusively to public or philanthropic health care services. Among the children included in the research, 87.3% were eutrophic, 94% were fully vaccinated, 90.6% had never been hospitalized as a consequence of acute respiratory infections (ARI). During the follow up of 1 year, 554 episodes of ARI with mean of 6.8 days of duration were identified. The incidence of ARI was 11.8 episodes per 100 children/month. The most vulnerable age group consisted of children up to one year of age. Thirty six percent of the ARI events were followed by at least one other case in the household. The index case in 53% of these cases were children up to 6 years old. Around 52.6% of the episodes did not require a medical assistance, 46.7% were assisted in ambulatory, 4 cases (0.7%) have had hospital treatment and only one died. The most frequent therapeutical conduct regarding children submitted to medical care assistance was the prescription of antibiotics and expectorants. Some factors related to social economic status and personal background such as living conditions and history of previous respiratory diseases were associated with higher incidence of ARI.
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Affiliation(s)
- R de C Barata
- Departamento de Medicina Social da Faculdade de Ciências Médicas da Santa Casa de Misericórdia de São Paulo, Brasil
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17
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Waldman EA, Moreira RC, Saez SG, Souza DF, Carmona RDC, Takimoto S, Cortes VDA. Human enterovirus infection in stray dogs. Some aspects of interest to public health. Rev Inst Med Trop Sao Paulo 1996; 38:157-61. [PMID: 9071037 DOI: 10.1590/s0036-46651996000200012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [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: 02/04/2023] Open
Abstract
To investigate the possible role of domestic animals as reservoirs of human enteroviruses, we studied 212 stray dogs captured in different areas of the municipality of São Paulo. The captured animals were divided into 19 groups of 10 to 20 dogs each; faeces of 126 of the 212 dogs were processed for enterovirus isolation. The following viruses were isolated from 12 dogs; poliovirus type 1 (2 dogs), poliovirus type 3 (1 dog), echovirus type 7 (8 dogs) and echovirus type 15 (1 dog). Of the 12 infected animals, four had specific homotypic neutralizing antibody titres > or = 16. All 212 animals were tested for the presence of neutralizing antibodies to human enteroviruses. The frequency of neutralizing antibodies present in titres of > or = 16 was 10.3%, 3.8% and 4.3% for vaccinal prototypes of polioviruses 1, 2 and 3 respectively; 1.9%, 1.4% and 1.5% for wild prototypes of the same viruses, 11.3% for echovirus 7, and 2.4% for echovirus 15. The proportion of dogs with neutralizing antibodies varied with the virus studied. Some indication of the susceptibility of dogs to infection with human enteroviruses was demonstrated, and the importance of this fact for the Plan for Global Eradication of the Wild Poliovirus is discussed.
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Affiliation(s)
- E A Waldman
- Dep. de Epidemiologia, Faculdade de Saúde Pública da Universidade de São Paulo, Brazil
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18
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Moreira RC, Castrignano SB, Carmona RDC, Gomes FM, Saes SG, Oliveira RS, Souza DF, Takimoto S, Costa MC, Waldman EA. An exanthematic disease epidemic associated with coxsackievirus B3 infection in a day care center. Rev Inst Med Trop Sao Paulo 1995; 37:235-8. [PMID: 8525269 DOI: 10.1590/s0036-46651995000300009] [Citation(s) in RCA: 10] [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] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
An epidemic of exanthematic illness in a day care center is described. Ten children aged 7 to 13 months were affected by the illness. The exanthem was characterized by nonconfluent macular or maculopapular lesions that appeared on the face, body and limbs. Fifty percent of the infected children had fever of up to 39 degrees C at the beginning of the disease. Coxsackievirus B3 (CB3) was isolated from the stool of one ill child. Paired serum samples were obtained from eight ill children and six of them presented seroconversion to CB3. Antibodies to CB3 were detected at titers higher than 16 in a single serum sample collected from the other two patients. Neutralizing antibodies to CB3 were detected in 71.0% of the contact children.
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19
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de Paiva TM, Takimoto S, Ishida MA, de Souza MC, Ishimaru T, Neumann J, Kalil J. Comparative study of adenoviruses with monoclonal antibodies. Rev Inst Med Trop Sao Paulo 1992; 34:19-26. [PMID: 1284894 DOI: 10.1590/s0036-46651992000100004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The obtainment of monoclonal antibodies for adenovirus species 4(Ad4) is described. The specificities of selected monoclonal antibodies were determined by means of viral neutralization test in cell culture, immunofluorescence and Enzyme-Linked Immunosorbent Assay (ELISA), in the presence of the following species of human adenovirus: 1, 2, 5 (subgenus C), 4 (subgenus E), 7 and 16 (subgenus B) and 9 (subgenus D). Two monoclonal antibodies species specific to adenovirus 4 (1CIII and 3DIII) and one monoclonal antibody that cross reacted with adenovirus species 4 and 7 (2HIII) were obtained.
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Affiliation(s)
- T M de Paiva
- Laboratório de Vírus Respiratórios, Instituto Adolfo Lutz, São Paulo, Brasil
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Takimoto S, Grandien M, Ishida MA, Pereira MS, Paiva TM, Ishimaru T, Makita EM, Martinez CH. Comparison of enzyme-linked immunosorbent assay, indirect immunofluorescence assay, and virus isolation for detection of respiratory viruses in nasopharyngeal secretions. J Clin Microbiol 1991; 29:470-4. [PMID: 2037663 PMCID: PMC269802 DOI: 10.1128/jcm.29.3.470-474.1991] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Nasopharyngeal secretions obtained from 94 children with acute respiratory illness were examined for the presence of respiratory syncytial virus (RSV), adenovirus, and influenza virus type A by virus culturing (virus isolation technique [VIT]), immunofluorescence assay (IFA), and enzyme-linked immunosorbent assay (ELISA). Similar results were obtained in at least two tests for RSV, influenza virus type A, and adenovirus in 92 (97.9%), 88 (93.6%), and 88 (93.6%) cases, respectively. Both rapid virus detection methods showed good specificity for the diagnosis of these virus infections (greater than or equal to 90.7%) and were more sensitive than was VIT for RSV detection. In a more accurate statistical analysis, the indexes of agreement between VIT and ELISA were substantial for RSV (kappa = 0.69; zeta = 5.5; P less than 0.0001), influenza virus type A (kappa = 0.67; zeta = 5.3; P less than 0.0001), and adenovirus (kappa = 0.71; zeta = 6.0; P less than 0.0001), while it was almost perfect for RSV when ELISA was compared with IFA (kappa = 0.88; zeta = 5.7; P less than 0.0001). Although the observed agreement was good in the comparison of these two tests for these three viruses (89%0, the indexes of agreement were moderate in the comparison of IFA and VIT for RSV (K = 0.55; Z = 2.0; P < 0.05), influenza virus type A (K = 0.42; Z = 9.7; P < 0.0001), and adenovirus (K = 0.41; Z = 6.5; P < 0.0001) and of ELISA and IFA for influenza virus type A (K = 0.55; Z = 7.0; P < 0.0001) and adenovirus (K = 0.59; Z = 6.8; P < 0.0001). All of the statistical evaluations demonstrated better agreement between ELISA and VIT for influenza virus type A and adenovirus.
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Affiliation(s)
- S Takimoto
- Serviço de Virologia, Instituto Adolfo Lutz, São Paulo, Brazil
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21
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Waldman EA, Takimoto S, Ishida MA, Kitamura C, Mendonça LI. [Enterovirus 70 in the metropolitan region of São Paulo, Brazil, from 1984 to 1987: infection aspects in endemic and epidemic periods]. Rev Inst Med Trop Sao Paulo 1990; 32:221-8. [PMID: 1966917] [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: 12/29/2022] Open
Abstract
Results of investigation about Enterovirus-70 (EV-70) as an etiologic agent of epidemic of acute haemorrhagic conjunctivitis (AHC) and neurological disease in the metropolitan area of São Paulo city are presented. During the first three months of 1984, in an epidemic period of AHC, 3 groups with a total of 291 persons were studied. The group A included 90 individuals affected by AHC; the 99 persons belonging to group B did not acquire the AHC but referred familiar contact with the ill individuals; the group C included 102 persons who denied the AHC or any contact with the illness. Neutralization test in BHK-21 cell culture was used for measurement of antibodies in sera. For the detection of the presence of IgM, indirect immunofluorescence assay was utilized. The presence of IgM antibodies was observed in 56.7%, 33.3% and 20.6% of persons belonging to groups A, B and C, respectively. The 10-29 age group was the most affected in the group A. From april 1984, after the end of epidemic period of AHC, until December 1987, three sporadic cases of AHC and 10 cases with acute neurological disease associated with recent infection by EV-70 were observed. Nine of 10 persons with acute neurological symptoms had paralysis of cranial nerves, all of them recovering without sequelae. The circulation of EV-70 in the population during the endemic period was maintained by either asymptomatic, sporadic cases of AHC or neurological diseases.
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Affiliation(s)
- E A Waldman
- Instituto Adolfo Lutz, Universidade de São Paulo, Brasil
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22
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Takimoto S, Tanaka H, Gomes LF, Waldman EA, Pereira HG, Paiva TM, Coimbra TL, Ueda M, Meles HH. Preliminary characterization of a new virus isolated from the spinal fluid of patients with meningitis in São Paulo, Brazil. Rev Inst Med Trop Sao Paulo 1990; 32:162-7. [PMID: 2135368 DOI: 10.1590/s0036-46651990000300003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
A total of 138 patients with the age of 4 months to 57 years were attended in different hospitals of São Paulo State with aseptic meningitis. A probable new agent was isolated from the cerebrospinal fluid of 35 of 53 specimens examined. Replication of the agent with similar characteristics was detected by CPE produced in the MDCK cell line. Virus-like particles measuring about 40 nm in diameter were observed by negative staining electron microscopy. No hemagglutinating activity was detected at pH 7.2 by using either human, guinea pig, chicken and at pH ranged 6.0-7.2 with goose red blood cells. The agent was not pathogenic to newborn or adult mice. Virus infectivity as measured by CPE was sensitive to chloroform and not inhibited by BuDR, suggesting that agent is an enveloped virus with RNA genome.
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Affiliation(s)
- S Takimoto
- Instituto Adolfo Lutz, São Paulo, Brasil
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23
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Weinberg A, Fink MC, Takimoto S, Ishida MA, Souza MC. Enzyme linked immunosorbent assay: determination of anti-adenovirus antibodies in an infant population. Rev Inst Med Trop Sao Paulo 1989; 31:336-40. [PMID: 2697933 DOI: 10.1590/s0036-46651989000500007] [Citation(s) in RCA: 9] [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: 01/02/2023] Open
Abstract
In order to define an accurate assay for anti-adenovirus antibody detection, a recently developed ELISA was compared with IFA and CF. On 58 sera, the ELISA was more sensitive than both CF and IFA, which showed relative sensitivities of 63% and 94%, respectively. It was not possible to determine the exact specificity of the tests because of the lack of a gold standard. Furthermore, the ELISA was used to define the prevalence of adenovirus antibodies in 116 infants between 1 and 24 months old (mean 7.28). The data showed that maternal antibodies waned by the age of 5 to 6 months and that more than 80% of the children had been infected by adenoviruses by the age of 10 months.
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24
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Yamada Y, Okada N, Tachikawa K, Kishi T, Saikawa H, Takimoto S, Ishida S, Kurosaki N, Saito Y, Enomoto S. [Dental office contamination during dental treatment]. Kokubyo Gakkai Zasshi 1988; 55:479-82. [PMID: 3204325 DOI: 10.5357/koubyou.55.479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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25
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Takimoto S, Carvalho RP, Pereira HG, Pannuti CS, Pereira MS, de Salles-Gomes LF. Serologic studies on the behaviour of influenza virus type A in persons of Greater São Paulo during 1976, 1978 and 1979. Rev Inst Med Trop Sao Paulo 1986; 28:413-20. [PMID: 3602828 DOI: 10.1590/s0036-46651986000600007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Sera of persons of different age groups collected in 1976, 1978 and 1979 were tested for the presence of HI antibodies against various strains of the H3N2 and H1N1 subtypes of influenza virus. The occurrence of infection by H3N2 subtype was recorded during the 1976-1978 period but in 1979, circulation of this subtype of virus was limited. The prevalence of antibody against A/São Paulo/1/78 (H1N1) was significantly higher than that of antibody to A/USSB/90/77 (HIND in 1978. However in 1979 the predominant strain was A/USSR/90/77 (HIND. Persons under 20 years of age were the most affected by H1N1 subtype. Antibodies to H1N1 subtype were detected in sera of individuals older than 20 years in 1976, before the re-emergence of this strain. Serological results indicate that infections by H3N2 subtype in 1978 occurred in 65.4% of young children (0-4 year group). About 47.0% of children from the 0-4 year group had antibodies to H1N1 subtype in 1979. Antibodies to swine influenza virus were detected in 60% of 60+ year old people.
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26
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Imajo Y, Suematsu T, Narabayashi I, Gose K, Takimoto S, Kimura S, Matsuura S. [Complication of radiation therapy]. Gan No Rinsho 1984; 30:1225-30. [PMID: 6471424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The radiation pneumonitis is a major complication for patients receiving thoracic irradiation. This report describe the radiographic recognition, pathological change and impaired pulmonary functions of radiation pneumonitis. The 57 patients with lung cancer treated with radiation are analyzed on the pneumonitis by chest X-P. Among these, 50 patients (88%) develop radiation pneumonitis. Repeated CT scans give more detailed information than conventional radiograms as to exudative changes. The pathological analysis are made on the 35 patients of which affected lungs are resected after pre-operative irradiation. Three phases are recognized in the evolution of pneumonitis, the congestive, the degenerative, and the fibrotic. Adding to the morphological damage, pulmonary functions also deteriorate both in ventilation and perfusion scans.
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Gose K, Imajo Y, Takimoto S, Ichiyanagi A, Oshitani T, Kimura S, Hiratsuka J, Ueda N, Yamaguchi T. [Two autopsy cases of intramedullary spinal cord metastasis]. Gan No Rinsho 1984; 30:319-23. [PMID: 6325758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Two autopsy cases of intramedullary metastasis to the spinal cord from small cell lung cancer and seminoma of the testis are reported and a review of the literature is presented. Rather than lung cancer, the most common primary tumor of this rare intramedullary spinal cord metastasis is seminoma of the testis. In our case, we posit the occurrence of hematogenous spread via arterial and vertebral venous system.
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Imanaka K, Gose K, Ichiyanagi A, Ashida C, Hamada F, Hashimura T, Takimoto S, Murakami M, Imajo Y, Kimura S. [Experimental study on active specific immunotherapy utilizing the immune reaction of low-dose irradiated tumor tissue. 8. Effect of mitomycin C-treated active specific immunotherapy]. Nihon Gan Chiryo Gakkai Shi 1983; 18:940-5. [PMID: 6413626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Taira T, Kii R, Sakai K, Tabuchi H, Takimoto S, Nakamura S, Takahashi J, Hashimoto E, Yamamura H, Nishizuka Y. Comparison of glycogen phosphorylase kinases of various rat tissues. J Biochem 1982; 91:883-8. [PMID: 6281247 DOI: 10.1093/oxfordjournals.jbchem.a133776] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Glycogen phosphorylase kinases in soluble fractions of various rat tissues were examined for the pH 6.8/8.5 activity ratio, Ca2+-dependency, activation by cyclic AMP-dependent protein kinase (protein kinase A), and reactivity with anti-skeletal muscle phosphorylase kinase serum. The enzymes could be divided into at least two major groups; muscle and liver types. The muscle type, that has a low value of pH 6.8/8.5 activity ratio, is highly dependent on Ca2+, markedly activated by protein kinase A, and strongly inhibited by the antiserum. Inversely, the liver type, that has a high value of pH 6.8/8.5 activity ratio, is poorly dependent on Ca2+, not activated by protein kinase A, and weakly inhibited by the antiserum. The enzymes from heart and skeletal muscle were similar and belonged to the former entity. Whereas, the enzymes from liver, kidney, spleen, lung, and testis appeared to belong to the latter entity. The enzyme from brain apparently differs from these entities, and seems to be an intermediate type or a hybrid of the two.
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Takimoto S, Pannuti CS, Gomes LF, Barbosa HH, Moraes VC, Higuchi AE. [Influenza in São Paulo 1976-1978]. Rev Inst Med Trop Sao Paulo 1982; 24:49-55. [PMID: 7123068] [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: 01/23/2023] Open
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31
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Pannuti CS, Carvalho RP, Evans AS, Cenabre LC, Amato Neto V, Camargo M, Angelo MJ, Takimoto S. A prospective clinical study of the mononucleosis syndrome in a developing country. Int J Epidemiol 1980; 9:349-53. [PMID: 6259069 DOI: 10.1093/ije/9.4.349] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
A prospective aetiologic analysis made of 70 children and adults with the clinical and haematologic features of infectious mononucleosis (IM) in Sao Paulo, Brazil, revealed 65.7% due to EBV (31 heterophile antibody positive (HA+), 15 HA negative (HA-) cases), 8.6% due to T. gondii and 4.3% due to CMV. One case was related to viral hepatitis and one to drug hypersensitivity. The other 18.6% were of unknown cause. In the 46 IM cases positive tests were found for EBV/IgM in 93.5%, for heterophile by the absorbed horse Rbc test in 64.2% and by sheep Rbc in 37%. The immune-adherence haemagglutination test was slightly more sensitive than the horse Rbc test in 39 IM sera tested. In 41 EBV/IgM positive sera, EBV/IgA was present in 17/25 containing heterophile antibody and in 2/16 lacking heterophile antibody; anti-EA was present in 85%. The average age of HA+ IM cases was 13.2 years and of HA- cases 4.7 years. Three HA+ and 5 HA- IM cases occurred in the 0-2 year old age group. Few clinical features differentiated between aetiological agents. Exudative tonsillitis was the most helpful one and occurred in 67.7% of HA+ IM cases, 26.7% of HA- cases, in 1 of 3 CMV cases, and not at all in 6 T. gondii infections.
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Kato Y, Takimoto S, Ogura H. Comparison of the effects of lead disodium ethylenediaminetetraacetate and lead acetate on hard tissues. Toxicol Appl Pharmacol 1978; 43:519-25. [PMID: 418530 DOI: 10.1016/s0041-008x(78)80011-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Kato Y, Takimoto S, Ogura H. Mechanism of induction of hypercalcemia and hyperphosphatemia by lead acetate in the rat. Calcif Tissue Res 1977; 24:41-6. [PMID: 597744 DOI: 10.1007/bf02223295] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The present study is an investigation of the mechanism of hypercalcemia and hyperphosphatemia induced by the intravenous injection of lead acetate (Pb-Ac). A total of 118 male rats were injected with 30 mg/kg of Pb-Ac, or with 16.5 mg/kg of sodium acetate as the control. The levels of serum calcium, phosphorus and lead were then determined at various time periods after the injections. Serum calcium and phosphorus levels increased with time after Pb-Ac injection and the maximum values of calcium (17 mg%) were found after 1 h and of phosphorus (13.5 mg%) after 30 min. Both calcium and phosphorus levels reverted to the normal range after 12 h. The maximum net rates of increase of calcium and phosphorus were found immediately after Pb-Ac injection. At that time, deposition of lead at the calcifying sites of bone and incisor dentin was demonstrated by a histochemical examination. In other experiments the changes in the calcium and phosphorus contents in the medium after shaking bone powder in serum with Pb-Ac in an in vitro system were studied. It was confirmed that the calcium and phosphorus were displaced from the bone mineral, the extent of the displacement being correlated with the concentration of the Pb-Ac added to the medium, and that these displacements were very rapid reactions. These results suggest that hypercalcemia and hyperphosphatemia following Pb-Ac injection results from a direct action of lead on the bone mineral.
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Kato Y, Ogura H, Takimoto S. [A preliminary study on the changes of calcium (Ca) and phosphorus (P) contents in serum following intravenous administration of lead acetate (author's transl)]. Nihon Yakurigaku Zasshi 1977; 73:675-82. [PMID: 924272 DOI: 10.1254/fpj.73.675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We investigated the mechanisms of interaction between lead acetate (Pb-Ac) and bone minerals. One hundred and eighteen male rats were used and the following experiments were carried out: (1) determination of changes in serum Ca and P following intravenous injection of Pb-Ac or sodium acetate(Na-Ac) as the control for acetate, (2) to ascertain the deposition of lead at the calcifying site of bone immediately after Pb-Ac administration. The serum Ca and P levels increased with time after Pb-Ac administration and the maximum values were noted after 1 hour in Ca (17 mg%) and 30 minutes in P (13.5mg%), respectively. Both Ca and P levels reverted to the normal range within 12 hours. The net increasing rates in both Ca and P were calculated from each value in the Pb-Ac and Na-Ac groups. Those maximum rates were found immediately after the Pb-Ac administration (0 approximately 30 sec). At the same time, deposition of lead was evident at the calcifying site of bone and insicor dentine.
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de Salles Gomes LF, Takimoto S, de Freitas JO. [Mycoplasma pneumoniae: frequency of infection in various age groups among the populations of the City and the State of São Paulo]. Rev Inst Med Trop Sao Paulo 1975; 17:20-6. [PMID: 1124326] [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: 12/25/2022] Open
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36
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Takimoto S. [Role of pyrophosphoric acid in calification]. Kokubyo Gakkai Zasshi 1974; 41:390. [PMID: 4375168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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37
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Takimoto S. Mechanism of the heterotopic calcification induced by subcutaneous injection of lead acetate. Bull Tokyo Med Dent Univ 1973; 20:287-301. [PMID: 4521624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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38
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Pereira HG, Takimoto S, Piegas NS, do Valle LA. Antigenic variation of equine (Heq2Neq2) influenzavirus. Bull World Health Organ 1972; 47:465-9. [PMID: 4540996 PMCID: PMC2480848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Influenza equine (Heq2Neq2) strains isolated during the course of epizootics observed in Guanabara (Rio de Janeiro) and São Paulo, Brazil, in July-October 1969 were shown to differ antigenically from earlier strains of the same subtype (A/equine/Miami/1/63 (Heq2Neq2)). The difference could be clearly demonstrated in haemagglutination inhibition tests performed with postinfection horse or ferret sera but not with hyperimmune rooster sera. Antibody responses of diseased horses were higher and more frequent against current isolates than against strain equine/Miami/1/63. Some animals also showed antibody responses to the Hong Kong variant of human influenzavirus A.
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Pereira HG, Takimoto S, do Valle LA. [Comparative tests of complement fixation and immunodiffusion in the diagnosis of influenza]. Rev Inst Med Trop Sao Paulo 1970; 12:211-6. [PMID: 4989768] [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: 01/13/2023] Open
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40
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Takimoto S, de Araujo J, Fischer AR, Martinez CH, do Valle LA. [Infections caused by respiratory viruses in children of São Paulo. II. Adenovirus: isolation and serological study]. Rev Inst Med Trop Sao Paulo 1969; 11:348-57. [PMID: 4311940] [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: 01/10/2023] Open
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41
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Mizumoto R, Fukuchi S, Yoshida K, Takimoto S, Nakai Y. [Two cases of urolithiasis in childhood]. Hinyokika Kiyo 1969; 15:291-6. [PMID: 5816781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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