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Hayashi S, Masuki S, Furuta K, Doi S, Kim S, Seike Y. Phylogenetic Analysis and Characterization of Odorous Compound-Producing Actinomycetes in Sediments in the Sanbe Reservoir, A Drinking Water Reservoir in Japan. Curr Microbiol 2022; 79:344. [PMID: 36209310 DOI: 10.1007/s00284-022-03052-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 09/21/2022] [Indexed: 11/03/2022]
Abstract
Odor caused by the presence of geosmin and 2-methylisoborneol (2-MIB) in aquatic ecosystems leads to considerable economic loss worldwide. The odorous compounds are primarily produced by cyanobacteria and actinomycetes. While the contribution of odorous compounds-producing cyanobacteria has been thoroughly investigated, the production of geosmin and 2-MIB by actinomycetes in aquatic ecosystems is poorly understood. In this study, we isolated geosmin and/or 2-MIB-producing actinomycetes in sediments collected from the Sanbe Reservoir, Japan, identified the biosynthetic gene of geosmin and 2-MIB, and investigated the production of the odorous compounds by the isolated strains. Partial sequence of 16S rRNA and the biosynthetic genes was determined to analyze the phylogenetic relationship among the strains. The geosmin and 2-MIB concentrations in the culture of the isolated strains were measured using gas chromatography mass spectrometry. Fifty-four strains of odorous compounds-producing and non-geosmin-producing actinomycetes were isolated from sediments from the Sanbe Reservoir. Diverse actinomycetes were identified and many of them produced geosmin and/or 2-MIB. Many odorous compounds-producing actinomycetes were phylogenetically different from previously reported producing actinomycetes. The producing ability of the odorous compounds of the isolated strains in this study was not significantly related with the phylogenetic groups of 16S rRNA and the biosynthetic genes. The findings suggest that the odorous compounds-producing actinomycetes in the sediments are diverse and different from previously reported strains.
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Affiliation(s)
- Shohei Hayashi
- Faculty of Life and Environmental Science, Shimane University, 1060 Nishikawatsu, Matsue, Shimane, 690-8504, Japan. .,Estuary Research Center, Shimane University, 1060 Nishikawatsu, Matsue, Shimane, 690-8504, Japan.
| | - Shingo Masuki
- Estuary Research Center, Shimane University, 1060 Nishikawatsu, Matsue, Shimane, 690-8504, Japan
| | - Koichi Furuta
- Shimane Environment & Health Public Corporation, 1-4-6 Koshibara, Matsue, Shimane, 690-0012, Japan
| | - Shinichi Doi
- Shimane Environment & Health Public Corporation, 1-4-6 Koshibara, Matsue, Shimane, 690-0012, Japan
| | - Sangyeob Kim
- Estuary Research Center, Shimane University, 1060 Nishikawatsu, Matsue, Shimane, 690-8504, Japan
| | - Yasushi Seike
- Estuary Research Center, Shimane University, 1060 Nishikawatsu, Matsue, Shimane, 690-8504, Japan
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2
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Hikino A, Sugahara S, Kato T, Senga Y, Egawa M, Park JY, Kamiya H, Tanaka H, Seike Y. Sensitive Gas Chromatography Detection of Nanomolar Hydroxylamine in Environmental Water by Fe(III) Oxidation. ANAL SCI 2021; 37:347-351. [PMID: 33012754 DOI: 10.2116/analsci.20p254] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 11/23/2022]
Abstract
Nanomolar concentrations of NH2OH in natural water sources were determined using an Fe3+ oxidation method. A pH of 2.35 - 2.50 was used, which was adjusted by adding a chloroacetate buffer. Equal amounts (1.0 mL) of the chloroacetate solution and ferric chloride solution were added to the water sample (70 mL) to oxidize NH2OH to N2O. The resulting N2O in the sample water was then quantified by headspace analysis using a gas chromatograph with an electron-capture detector (ECD), where a limit of detection of 0.2 μgN L-1 (14 nmol L-1) was achieved. This method was successfully applied to samples of freshwater, brackish water, and seawater, and despite the various salinities no interfering substances were observed. Furthermore, NH2OH was successfully detected in samples collected from the Hii River and Lakes Shinji and Nakaumi (Shimane Prefecture, Japan). In addition, the proposed method was also applicable to samples rich in organic substance derived from phytoplankton.
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Affiliation(s)
- Aiko Hikino
- Graduate School of Science and Engineering, Shimane University
| | - Shogo Sugahara
- Graduate School of Science and Engineering, Shimane University
| | - Toshikuni Kato
- Shimane Prefectural Institute of Public Health and Environmental Science
| | | | - Michiko Egawa
- Graduate School of Science and Engineering, Shimane University
| | - Ja Yeong Park
- Graduate School of Science and Engineering, Shimane University
| | - Hiroshi Kamiya
- Shimane Prefectural Institute of Public Health and Environmental Science
| | - Hidekazu Tanaka
- Graduate School of Science and Engineering, Shimane University
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3
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Kato T, Sugahara S, Kajitani T, Senga Y, Egawa M, Kamiya H, Seike Y. Determination of Trace Hydrazine in Environmental Water Samples by in situ Solid Phase Extraction. ANAL SCI 2017; 33:487-491. [PMID: 28392526 DOI: 10.2116/analsci.33.487] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A simple and rapid in situ method for the determination of hydrazine based on the concentration of aldazine compound formed by the reaction of hydrazine with p-dimethylaminobenzaldehyde was developed. This method was based on solid-phase extraction using a Sep-Pak C18 cartridge, followed by the quantification of hydrazine using a spectrophotometric method. To a sample solution of environmental water, p-dimethylaminobenzaldehyde solution was added to form aldazine by the reaction with hydrazine. The solution was passed through a Sep-Pak C18 cartridge for the adsorption of aldazine. In the laboratory, the aldazine adsorbed on the Sep-Pak C18 cartridge was eluted by passing a hydrochloric acid-ethanol (1:10) solution through the cartridge, and the color intensity of the solution was measured at 457 nm. The limit of detection for the new method was 0.2 mgN L-1 of hydrazine. The determination of hydrazine in solution was not influenced even by hydrogen sulfide and organic matter. This method was then applied to the brackish water of Lake Nakaumi in the eastern area of Shimane Prefecture, Japan. This method was used to determine hydrazine in freshwater, seawater and wastwater.
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Affiliation(s)
- Toshikuni Kato
- Graduate School of Science and Engineering, Shimane University
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4
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Godo T, Saki Y, Nojiri Y, Tsujitani M, Sugahara S, Hayashi S, Kamiya H, Ohtani S, Seike Y. Geosmin-producing Species of Coelosphaerium (Synechococcales, Cyanobacteria) in Lake Shinji, Japan. Sci Rep 2017; 7:41928. [PMID: 28195147 PMCID: PMC5307322 DOI: 10.1038/srep41928] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 01/04/2017] [Indexed: 11/09/2022] Open
Abstract
In Lake Shinji, Japan, periodic outbreaks of musty odour have occurred since mid-May 2007. Although the substance responsible for the odour was identified as geosmin, the odour-producing organism was unknown. We cultivated an axenic unialgal strain and determined that a species of Coelosphaerium (Synechococcales) was responsible for the production of geosmin in Lake Shinji. Our analysis was conducted using gas chromatography/mass spectrometry to determine the odorous compound. To determine the algae species, it was observed by optical microscopy to describe its morphological characteristics and the polymerase chain reaction was used to characterise the nucleotide sequence of the 16S rRNA gene and the 16S-23S rRNA internal transcribed spacer region. In addition, we explored the relationship between the number of cells of the Coelosphaerium sp. and the concentration of geosmin. In conclusion, geosmin, the cause of the musty odour in Lake Shinji in autumn 2009, was produced by Coelosphaerium sp., and to our knowledge, this is the first report of a geosmin-producing species in the family Coelosphaeriaceae.
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Affiliation(s)
- T Godo
- Shimane Prefectural Institute of Public Health and Environmental Science, 582-1 Nishihamasada, Matsue, Shimane 690-0122, Japan
| | - Y Saki
- Shimane Prefectural Institute of Public Health and Environmental Science, 582-1 Nishihamasada, Matsue, Shimane 690-0122, Japan
| | - Y Nojiri
- Shimane Prefectural Institute of Public Health and Environmental Science, 582-1 Nishihamasada, Matsue, Shimane 690-0122, Japan
| | - M Tsujitani
- The United Graduate School of Agricultural Sciences, Tottori University, 4-101 Koyama-cho minami, Tottori, Tottori 680-8553, Japan
| | - S Sugahara
- Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue, Shimane 690-8504, Japan
| | - S Hayashi
- Faculty of Life and Environmental Science, Shimane University, 1060 Nishikawatsu, Matsue, Shimane 690-8504, Japan
| | - H Kamiya
- Shimane Prefectural Institute of Public Health and Environmental Science, 582-1 Nishihamasada, Matsue, Shimane 690-0122, Japan
| | - S Ohtani
- Faculty of Education, Shimane University, 1060 Nishikawatsu, Matsue, Shimane 690-8504, Japan
| | - Y Seike
- Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue, Shimane 690-8504, Japan
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Rathnayake RMLD, Sugahara S, Maki H, Kanaya G, Seike Y, Satoh H. High spatial resolution analysis of the distribution of sulfate reduction and sulfide oxidation in hypoxic sediment in a eutrophic estuary. Water Sci Technol 2017; 75:418-426. [PMID: 28112669 DOI: 10.2166/wst.2016.516] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Bottom hypoxia and consequential hydrogen sulfide (H2S) release from sediment in eutrophic estuaries is a major global environmental issue. We investigated dissolved oxygen, pH and H2S concentration profiles with microsensors and by sectioning sediment cores followed by colorimetric analysis. The results of these analyses were then compared with the physicochemical properties of the bottom water and sediment samples to determine their relationships with H2S production in sediment. High organic matter and fine particle composition of the sediment reduced the oxidation-reduction potential, stimulating H2S production. Use of a microsensor enabled measurement of H2S concentration profiles with submillimetre resolution, whereas the conventional sediment-sectioning method gave H2S measurements with a spatial resolution of 10 mm. Furthermore, microsensor measurements revealed H2S consumption occurring at the sediment surface in both the microbial mat and the sediment anoxic layer, which were not observed with sectioning. This H2S consumption prevented H2S release into the overlying water. However, the microsensor measurements had the potential to underestimate H2S concentrations. We propose that a combination of several techniques to measure microbial activity and determine its relationships with physicochemical properties of the sediment is essential to understanding the sulfur cycle under hypoxic conditions in eutrophic sediments.
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Affiliation(s)
| | - Shogo Sugahara
- Interdisciplinary Faculty of Science and Engineering, Shimane University, Matsue, Shimane 690-8504, Japan
| | - Hideaki Maki
- National Institute for Environmental Studies (NIES), 16-2, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Gen Kanaya
- National Institute for Environmental Studies (NIES), 16-2, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Yasushi Seike
- Interdisciplinary Faculty of Science and Engineering, Shimane University, Matsue, Shimane 690-8504, Japan
| | - Hisashi Satoh
- Division of Environmental Engineering, Faculty of Engineering, Hokkaido University, North-13, West-8, Sapporo 060-8628, Japan E-mail:
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Fukuda T, Tanaka H, Morita Y, Itonaga T, Seike Y, Minatoya K, Naito H. Endovascular aneurysm sealing using NBCA to control type Ia endoleak for the treatment of abdominal aortic aneurysm with challenging neck. J Vasc Interv Radiol 2016. [DOI: 10.1016/j.jvir.2015.12.531] [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: 10/22/2022] Open
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7
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Sugahara S, Kamiya H, Suyama Y, Senga Y, Ayukawa K, Okumura M, Seike Y. Influence of hypersaturated dissolved oxygenated water on the elution of hydrogen sulfide and methane from sediment in the dredged area in polyhaline Lake Nakaumi. Landscape Ecol Eng 2014. [DOI: 10.1007/s11355-014-0270-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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8
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Mahatantila K, Vithanage M, Seike Y, Okumura M. Adsorptive removal of cadmium by natural red earth: equilibrium and kinetic studies. Environ Technol 2012; 33:597-606. [PMID: 22629634 DOI: 10.1080/09593330.2011.586059] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Natural red earth (NRE), an iron-coated sand found in the north western part of Sri Lanka, was used to examine the retention behaviour of cadmium, a heavy metal postulated as a factor of chronic kidney disease in Sri Lanka. Adsorption studies were conducted as a function of pH, ionic strength, initial Cd loading and time. The Cd adsorption increased from 6% to 99% with the pH increase from 4 to 8.5. The maximum adsorption was reached at pH > 7.5. Cadmium adsorption was not changed over 100-fold variations of NaNO3, providing evidence for the dominance of an inner-sphere bonding mechanism for both 10-fold variation of initial Cd concentrations. Surface complexation modelling suggests a monodentate bonding mechanism. Isotherm data were fairly fitted to a two-site Langmuir isotherm model and sorption maximums of 9.11 x 10(-6) and 3.89 x 10(-7) mol g(-1) were obtained for two surface sites. The kinetic study reveals that Cd uptake by NRE is so fast that the equilibrium was reached within 15 min and - 1 h for 4.44 and 44.4 microM initial Cd concentrations, respectively, and the chemisorption was the dominant mechanism over intra-particle diffusion. The study indicates the potential of NRE as a material for decontaminating environmental water polluted with Cd.
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9
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Sugahara S, Yurimoto T, Ayukawa K, Kimoto K, Senga Y, Okumura M, Seike Y. A Simple in situ Extraction Method for Dissolved Sulfide in Sandy Mud Sediments Followed by Spectrophotometric Determination and Its Application to the Bottom Sediment at the Northeast of Ariake Bay. BUNSEKI KAGAKU 2010. [DOI: 10.2116/bunsekikagaku.59.1155] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
| | | | | | | | - Yukiko Senga
- Faculty of Geo-Environmental Science, Rissho University
| | | | - Yasushi Seike
- Faculty of Science and Engineering, Shimane University
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10
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Okamoto K, Seike Y, Okumura M. A Simple Speciation Analysis Using Tristimulus Colorimetry for Arsenic(III) and Arsenic(V) in Environmental Water after Selective Coprecipitation with Barium Sulfate. BUNSEKI KAGAKU 2010. [DOI: 10.2116/bunsekikagaku.59.653] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Keishi Okamoto
- Interdisciplinary Graduate School of Science and Engineering, Shimane University
| | - Yasushi Seike
- Department of material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University
| | - Minoru Okumura
- Department of material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University
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11
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Okumura M, Shiono T, Ando K, Seike Y. A Simple Spectrophotometric Method for the Determination of Dissolved Oxygen in Environmental Waters. BUNSEKI KAGAKU 2009. [DOI: 10.2116/bunsekikagaku.58.317] [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: 11/23/2022]
Affiliation(s)
- Minoru Okumura
- Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University
| | - Takashi Shiono
- Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University
| | - Kunihiro Ando
- Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University
| | - Yasushi Seike
- Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University
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12
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Affiliation(s)
- Kosuke Tanifuji
- Interdisciplinary Graduate School of Science and Engineering, Shimane University
| | - Yasushi Seike
- Department of material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University
| | - Minoru Okumura
- Department of material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University
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13
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Inoue A, Seike Y, Okumura M. A Simple Determination of Inorganic and Organic Phosphorus Compounds in Environmental Water Based on Their Collection and Separation Using Zirconium-Loaded Activated Carbon. BUNSEKI KAGAKU 2008. [DOI: 10.2116/bunsekikagaku.57.599] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Akiko Inoue
- Interdisciplinary Graduate School of Science and Engineering, Shimane University
| | - Yasushi Seike
- Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University
| | - Minoru Okumura
- Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University
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14
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Hirota M, Senga Y, Seike Y, Nohara S, Kunii H. Fluxes of carbon dioxide, methane and nitrous oxide in two contrastive fringing zones of coastal lagoon, Lake Nakaumi, Japan. Chemosphere 2007; 68:597-603. [PMID: 17292942 DOI: 10.1016/j.chemosphere.2007.01.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2006] [Revised: 12/18/2006] [Accepted: 01/02/2007] [Indexed: 05/13/2023]
Abstract
We measured fluxes of carbon dioxide (CO(2)), methane (CH(4)), and nitrous oxide (N(2)O) simultaneously in two typical fringing zones, sandy shore and salt marsh, of coastal lagoon, Lake Nakaumi, Japan, in mid-summer 2003. Our aim was to quantify net the greenhouse gases (GHGs) fluxes and examine key factors, which control variation of the GHGs fluxes in the two sites. Net CO(2) and CH(4) fluxes were markedly different between the two sites; magnitudes and variations of the both fluxes in sandy shore were lower than those of salt marsh. Meanwhile, magnitude and variation of net N(2)O flux in the two sites were similar. In sandy shore, temporal and spatial variation of the three GHGs fluxes were highly controlled by water level fluctuation derived from astronomic tide. In salt marsh, spatial variation of the three GHGs fluxes were correlated with aboveground biomass, and temporal variation of CO(2) and CH(4) fluxes were correlated with soil temperature. The sum of global warming potential, which was roughly estimated using the observed GHGs fluxes, was ca. 174-fold higher in salt marsh than in sandy shore.
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Affiliation(s)
- Mitsuru Hirota
- Environmental Biology Division, National Institute for Environmental studies, Onogawa 16-2, Tsukuba, Ibaraki 305-8506, Japan.
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15
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Seike Y, Nagashima M, Sato H, Hori T, Ishitoya H, Hibino N, Tomino T. [Partial anomalous pulmonary venous connection to the high portion of the superior vena cava associated with ventricular septal defect repaired with williams method using right atrial flap: report of a case]. Kyobu Geka 2006; 59:573-6. [PMID: 16856533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
A 3-year-old boy suffered from the poor body weight gain under the diagnosis of partial anomalous pulmonary venous connection (PAPVC) to the high portion of the superior vena cava (SVC) associated with ventricular septal defect (VSD) and intact atrial septum (IAS). Preoperative cardiac catheterization revealed the pulmonary to systemic flow ratio 2.6 and mean pulmonary arterial pressure of 21 mmHg. He successfully underwent surgical repair with Williams method using right atrial (RA) flap out and VSD patch closure. Postoperative course was uneventful and echocardiography demonstrated no obstruction at the both routes of neo-SVC and neo-right upper pulmonary venous return.
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Affiliation(s)
- Y Seike
- Department of Cardiovascular Surgery, Ehime Prefectural Central Hospital, Matsuyama, Japan
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16
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Abstract
The evaluation of a simple and rapid tristimulus colorimetric method for the determination of arsenic in brackish waters and its application to brackish water samples taken from brackish Lake Nakaumi are described. The determinations of arsenic in brackish water samples were made satisfactorily independent of sample salinity. By applying this method to lake water samples, the distributions and behaviors of arsenic in the lake and their controlling factors were clarified, such as seasonal variations of arsenic and the effect of a typhoon.
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Affiliation(s)
- Md Mustafizur Rahman
- Interdisciplinary Graduate School of Science and Engineering, Shimane University, Matsue, Japan
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17
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Seike Y, Nagashima M, Sato H, Hori T, Nakata T, Saito H, Yokoyama Y, Tomino T. [Surgical treatment for the patient with atrial septal defect and Andersen syndrome]. Kyobu Geka 2005; 58:993-6. [PMID: 16235849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
An 18-year-old girl with atrial septal defect and Andersen syndrome is reported. Andersen syndrome was described as a hereditary disease characterized by periodic paralysis, prolongation of the QT interval with ventricular arrhythmia and characteristic physical features including low set ear and micrognathia. We successfully performed cardiac operation for this rare associated malformation.
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Affiliation(s)
- Y Seike
- Department of Cardiovascular Surgery, Ehime Prefectural Central Hospital, Matsuyama, Japan
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18
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Yokoyama Y, Nagashima M, Satoh H, Hori T, Nakata T, Saito H, Seike Y, Tomino T. [Successful repair of supravalvular aortic stenosis using Steinberg 3 sinuses reconstruction; report of a case]. Kyobu Geka 2005; 58:569-72. [PMID: 16004340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Steinberg method is a modification of Doty extended aortoplasty for supravalvular aortic stenosis (SAS). This modification entails placement of an additional patch in the left coronary sinus. A 3-year-old boy was diagnosed as SAS with aortic valvular stenosis. He was noticed a systolic murmur from 1 month after his birth. Echocardiography showed left ventricular hypertrophy, and pressure gradient of 80 mmHg was measured between the ascending aorta and the left ventricle. Cardiac catheterization revealed severe aortic stenosis at the sino-tubular (ST) junction. We adopted Steinberg 3 sinuses reconstruction. After this operation, there was no pressure gradient at ST junction although aortic valvular stenosis remained and mild aortic valve regurgitation newly developed. As this method can produce a symmetric aortic root, it may reduce aortic valve deformity especially on the left coronary cusp.
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Affiliation(s)
- Yuichiro Yokoyama
- Department of Cardiovascular Surgery, Ehime Prefectural Central Hospital, Matsuyama, Japan
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Yokoyama Y, Satoh H, Nagashima M, Hori T, Nakata T, Saito H, Seike Y, Tomino T. [Surgical treatment for postinfarction ventricular septal perforation]. Kyobu Geka 2005; 58:284-8. [PMID: 15828247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Between November 1985 and April 2003, surgical treatment for ventricular septal perforation (VSP) after acute myocardial infarction was performed in 16 patients. Patients were divided into 2 groups by method of operation. One group is infarct exclusion technique (n = 10). The other group is trans right ventricular (RV) approach (n = 6). No significant differences were observed between 2 groups in preoperative states. Operative death rate was high in both groups. Five patients (50%) were died in infarct exclusion group, 4 patients (67%) in trans RV group. Infarct exclusion technique needed longer extracorporeal circulation time (201 +/- 33 min) than trans RV approach (170 +/- 32 min). Although trans RV approach is attractive for its simplicity, 3 cases died of rupture of remained left ventricle infarction area. On the other hand, there were no mortality cases caused by left ventricle rupture in infarct exclusion technique group. As this result, we select infarct exclusion technique as a surgical correction for VSP.
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Affiliation(s)
- Yuichiro Yokoyama
- Department of Cardiovascular Surgery, Ehime Prefectural Central Hospital, Matsuyama, Japan
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20
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Fujinaga K, Suitou S, Seike Y, Okumura M. The Liquid-Liquid Extraction Using Hydrophilic Solvents Occluded to an Oil-Adsorbent as an Organic Phase: Extraction of 8-Quinolinolato Complexes of Alkaline Earth Metals into Tetrahydrofuran. ANAL SCI 2005; 21:341-3. [PMID: 15790124 DOI: 10.2116/analsci.21.341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In order to use a hydrophilic solvent as an organic phase in liquid-liquid extraction by retaining it to a solid support, the occlusion and desorption of nine hydrophilic solvents, such as methanol, to three kinds of commercially available oil-adsorbent were examined. The combination of tetrahydrofuran and WOSEP made by fibrous polypropylene was finally selected, and was subjected to the extraction of alkaline Earth metals with 8-quinolinol. It was proved that Mg2+, Ca2+, and Sr2+ ions could be successfully extracted into the tetrahydrofuran phase in the form of 8-quinolinolato complexes, which could not be extracted into CHCl3.
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Affiliation(s)
- Kaoru Fujinaga
- Department of Material Science, Faculty of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan.
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Okumura M, Honda S, Fujinaga K, Seike Y. A Simple and Rapid in situ Preconcentration Method for Trace Ammonia Nitrogen in Environmental Water Samples Using a Solid-Phase Extraction Followed by Spectrophotometric Determination. ANAL SCI 2005; 21:1137-40. [PMID: 16363488 DOI: 10.2116/analsci.21.1137] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A simple and rapid in situ preconcentration method for the spectrophotometric determination of trace ammonia nitrogen in environmental water samples has been developed based on solid-phase extraction using a small column packed with octadecyl group-bonded silica gel (Sep-Pak C18 cartridge). A water sample was taken into a graduated syringe for easy and simple operation and prevention of contamination immediately after sample collection. Ammonia in the sample was reacted with hypochlorite and thymol to be converted into indothymol blue; then the formed indothymol blue was collected as an ion pair between indothymol blue and tetrabutylammonium ion on a Sep-Pak C18 cartridge. The indothymol blue on the cartridge was stable for 4 days. The retained indothymol blue was easily eluted with a mixture of methanol and 0.01 mol/l sodium hydroxide solution. The color intensity due to the indothymol blue was spectrophotometrically measured at 725 nm. The proposed method was successfully applied to environmental water samples such as river water.
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Affiliation(s)
- Minoru Okumura
- Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University, Matsue, Japan
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Matsumoto M, Ohtsuki Y, Ochii K, Seike Y, Iseda N, Sasaki T, Okada Y, Kurabayashi A, Furihata M. Fibroblast growth factor receptor 3 protein expression in urothelial carcinoma of the urinary bladder, exhibiting no association with low-grade and/or non-invasive lesions. Oncol Rep 2004. [DOI: 10.3892/or.12.5.967] [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: 11/06/2022] Open
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Matsumoto M, Ohtsuki Y, Ochii K, Seike Y, Iseda N, Sasaki T, Okada Y, Kurabayashi A, Furihata M. Fibroblast growth factor receptor 3 protein expression in urothelial carcinoma of the urinary bladder, exhibiting no association with low-grade and/or non-invasive lesions. Oncol Rep 2004; 12:967-71. [PMID: 15492779] [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: 05/01/2023] Open
Abstract
Activating mutations of fibroblast growth factor receptor 3 (FGFR3), found in autosomal dominant human skeletal dysplasia, were reported to be involved in tumorigenesis and correlate with low-grade and superficial lesions of urothelial carcinoma. FGFR3 protein expression was immunohistochemically investigated in 126 cases of urothelial carcinoma of the urinary bladder to evaluate the role of this receptor in tumor behavior. p53 expression and the proliferating activity of tumor cells, assessed by Ki-67 expression, were also analyzed in parallel. Cytoplasmic and/or membrane immunostaining for FGFR3 was observed in 62 (49.2%) cases, including 20 (15.9%) cases of intense staining and 42 (33.3%) of moderate staining. p53 expression and Ki-67 labeling index (LI) were significantly correlated with high tumor grade (p=0.0093 and <0.0001, respectively) and invasion (p=0.0041 and <0.0001, respectively). Although there were two groups of interesting cases: low-grade and non-invasive tumors negative for p53 but positive for FGFR3, and high-grade and invasive tumors positive for p53 but negative for FGFR3, no statistically significant relationship was found between FGFR3 expression and tumor grade, invasion, p53 expression or Ki-67 LI. These results suggest that FGFR3 protein expression in bladder cancer is unlikely to affect tumor behavior as a unique single factor.
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Affiliation(s)
- Manabu Matsumoto
- Department of Tumor Pathology, Kochi Medical School, Kochi University, Nankoku, Kochi 783-8505, Japan.
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Kondo K, Ueda S, Chikuchi Y, Kawabata H, Akata N, Hasegawa H, Mitamura O, Seike Y, Inaba J. Effect of salinity on biological concentrations of137Cs in phytoplankton inhabited in brackish Lake Obuchi, Japan, bordered by nuclear fuel facilities. J Radioanal Nucl Chem 2004. [DOI: 10.1023/b:jrnc.0000037096.62190.4d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Seike Y, Fukumori R, Senga Y, Oka H, Fujinaga K, Okumura M. A Simple and Sensitive Method for the Determination of Hydroxylamine in Fresh-Water Samples Using Hypochlorite Followed by Gas Chromatography. ANAL SCI 2004; 20:139-42. [PMID: 14753272 DOI: 10.2116/analsci.20.139] [Citation(s) in RCA: 41] [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] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A new and simple method for the determination of hydroxylamine in environmental water, such as fresh rivers and lakes using hypochlorite, followed by its gas choromatographic detection, has been developed. A glass vial filled with sample water was sealed by a butyl-rubber stopper and aluminum cap without head-space, and then sodium hypochlorite solution was injected into the vial through a syringe to convert hydroxylamine to nitrous oxide. The head-space in the glass vial was prepared with 99.9% grade N2 using a gas-tight syringe. After the glass vial was shaken for a few minutes, nitrous oxide in the gas-phase was measured by a gas chromatograph with an electron-capture detector. The dissolved nitrous oxide in the liquid-phase was calculated according to the solubility formula. The proposed method was applied to the analysis of fresh-water samples taken from Iu river and Hii river, flowing into brackish Lakes Nakaumi and Shinji, respectively.
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Affiliation(s)
- Yasushi Seike
- Faculty of Science and Engineering, Shimane University, 1060, Matsue, Shimane 690-8504, Japan.
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Rahman MM, Fujinaga K, Seike Y, Okumura M. A Simple in situ Visual and Tristimulus Colorimetric Method for the Determination of Trace Arsenic in Environmental Water after Its Collection on a Mercury(II)-Impregnated Paper. ANAL SCI 2004; 20:165-70. [PMID: 14753277 DOI: 10.2116/analsci.20.165] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A simple in situ visual and tristimulus colorimetric method for the determination of trace arsenic in environmental water after collecting arsenic on a test paper impregnated with mercury(II) bromide and rosaniline chloride by its reduction aeration has been developed. The color development on the test paper is based on the formations of AsH(HgBr)2 (yellow) and/or As(HgBr)3 (brownish yellow) by a reaction between mercury(II) bromide and arsine (AsH3), which is produced through the reduction of As(III) (arsenite ion) and/or As(V) (arsenate ion) in a sample solution. To a sample solution, potassium iodide, tin(II) chloride, zinc sand and 4 ml of 6 M hydrochloric acid solution were added successively. The liberated arsine was collected on the test paper. The yellow or brownish-yellow color intensity on the test paper was measured by a tristimulus colorimeter and also by a visual method. The established method is applicable to the determination of arsenic in environmental water sample such as river, brackish, and seawater types.
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Affiliation(s)
- Md Mustafizur Rahman
- Interdisciplinary Graduate School of Science and Engineering, Shimane University, Matsue 690-8504, Japan
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Kondo K, Kawabata H, Ueda S, Hasegawa H, Mitamura O, Seike Y, Inaba J, Ohmomo Y. Distribution and dynamics of radionuclides and stable elements in the coastal waters off Rokkasho Village, Japan, prior to the opening of a nuclear reprocessing facility. J Radioanal Nucl Chem 2004. [DOI: 10.1023/b:jrnc.0000027065.78718.66] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kondo K, Kawabata H, Ueda S, Akata N, Mitamura O, Seike Y, Inaba J, Ohmomo Y. Distribution and dynamics of radionuclides and stable elements in the coastal waters off Rokkasho Village, Japan, prior to the opening of a nuclear reprocessing facility. J Radioanal Nucl Chem 2003. [DOI: 10.1023/b:jrnc.0000011739.58313.b8] [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: 11/12/2022]
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Okumura M, Anate T, Fujinaga K, Seike Y. A simple and rapid in situ preconcentration method using solid-phase extraction for the determination of dissolved manganese in brackish lake water samples. ANAL SCI 2002; 18:1093-7. [PMID: 12400653 DOI: 10.2116/analsci.18.1093] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A simple and rapid in situ preconcentration method for the determination of dissolved manganese in environmental waters has been developed based on solid-phase extraction using a Sep-Pak C18 cartridge. Manganese in water samples, which was taken into a graduated syringe to easily perform the operation for collecting manganese at sampling sites, was converted into a stable complex with 4-(2-pyridylazo)resorcinol (PAR) at pH 10 immediately after sample collection. The formed Mn-PAR complex was collected by a Sep-Pak C18 cartridge, which was packed with C18-bonded silica. The complex was stable in the Sep-Pak C18 cartridge for at least one month. The retained complex was quantitatively eluted with 0.5 M hydrochloric acid. The manganese was determined by graphite-furnace AAS. The proposed method was successfully applicable to brackish lake water samples to investigate the behavior of dissolved manganese in brackish lakes.
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Affiliation(s)
- Minoru Okumura
- Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University, Matsue, Japan
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Okumura M, Tong L, Fujinaga K, Seike Y. A simple and rapid in situ preconcentration method for the determination of phosphate in environmental waters by use of solid-phase extraction, and its applications to brackish lake waters. Fresenius J Anal Chem 2001; 370:104-7. [PMID: 11393228 DOI: 10.1007/s002160100739] [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] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A simple and rapid in situ preconcentration method for the determination of phosphate in environmental waters has been developed for field analysis. This method is based on solid-phase extraction on a zirconium-loaded Sep-Pack Accell CM cartridge (Zr-SP) and is applicable to studies in which sampling is performed by use of a graduated syringe to prevent contamination and to ensure easy operation at sampling sites. The Zr-SP cartridge was prepared by passing 0.1 mol L(-1) zirconium solution through a Sep-Pak Accell CM cartridge, packed with cation exchange sorbent based on a silica matrix. The adsorption of phosphate and its desorption depend only on the pH of the solution. A water sample containing phosphate was adjusted to pH 2 and passed through the Zr-SP cartridge to collect it. The retained phosphate was quantitatively eluted with 0.5 mol L(-1) sodium hydroxide solution. The phosphate retained in the Zr-SP cartridge was stable for at least one month. The established preconcentration method was successfully applied to brackish lake waters to investigate seasonal changes in the distribution and behavior of phosphate in a brackish lake.
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Affiliation(s)
- M Okumura
- Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University, Matsue, Japan.
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Gemma A, Seike M, Seike Y, Uematsu K, Hibino S, Kurimoto F, Yoshimura A, Shibuya M, Harris CC, Kudoh S. Somatic mutation of the hBUB1 mitotic checkpoint gene in primary lung cancer. Genes Chromosomes Cancer 2000; 29:213-8. [PMID: 10992296 DOI: 10.1002/1098-2264(2000)9999:9999<::aid-gcc1027>3.0.co;2-g] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.6] [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: 11/10/2022] Open
Abstract
Mutations in mitotic checkpoint genes have been detected in several human cancers, and these cancers exhibit chromosomal instability. Aneuploid stem cells seem to result from chromosomal instability and have been reported in many lung cancers. To determine whether alteration of mitotic checkpoint regulators is involved in carcinogenesis and tumor progression in primary lung cancer, we screened the genomic DNA sequence of 30 human lung cancer cell lines and 30 primary lung cancer tumors for a mutation in the hBUB1 mitotic checkpoint gene. First, we designed 26 sets of intron-based primers to amplify each of the 25 exons of the hBUB1 gene to examine the entire coding region of the hBUB1 gene. Using these primers, we performed polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) analysis as well as direct sequencing in the mutation analysis of the hBUB1 gene. Three different nucleotide substitutions were detected in the coding region of the hBUB1 gene in some of the cancer cell lines and primary tumors as follows. The hBUB1 gene of one adenocarcinoma tumor contained a somatic missense mutation, a cytosine-to-guanine substitution in codon 51 of exon 5 that resulted in a histidine-to-aspartic acid amino acid substitution. The hBUB1 gene of three lung cancer cell lines contained a thymine-to-cytosine substitution in codon 430 of exon 12, which did not result in an amino-acid substitution. We were unable to determine whether the nucleotide substitution in exon 12 was a polymorphism or a silent mutation because matched normal tissue was not available. A polymorphism in codon 93 of exon 4, a guanine-to-thymine substitution, in hBUB1 was found in one lung cancer cell line and one primary lung tumor. This is the first report of a somatic missense mutation of a gene involved in a mitotic checkpoint in primary lung cancer. The presence of a point mutation in the hBUB1 gene is consistent with the hypothesis that alteration of mitotic checkpoint genes is involved in the development of primary lung cancers. Because the frequency of hBUB1 gene mutations was low, future studies should focus on other mechanisms of inactivation of the hBUB1 gene as well as mutation analysis of other mitotic checkpoint genes in lung cancers.
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Affiliation(s)
- A Gemma
- Fourth Department of Internal Medicine, Nippon Medical School, Bunkyo-ku, Tokyo, Japan. Gemma_Akihiko/
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Okumura M, Fujinaga K, Seike Y, Honda S. A simple and rapid visual method for the determination of ammonia nitrogen in environmental waters using thymol. ACTA ACUST UNITED AC 1999. [DOI: 10.1007/s002160051642] [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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Moriwaki H, Matsumoto M, Hashikawa K, Oku N, Ishida M, Seike Y, Fukuchi K, Hori M, Nishimura T. Iodine-123-iomazenil and iodine-123-iodoamphetamine SPECT in major cerebral artery occlusive disease. J Nucl Med 1998; 39:1348-53. [PMID: 9708504] [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: 02/08/2023] Open
Abstract
UNLABELLED Iodine-123-iomazenil (IMZ) is a SPECT ligand for central-type benzodiazepine receptors, which are located only on neurons. We evaluated the feasibility of using IMZ SPECT for identifying neuronal damage in patients with the chronic phase of thrombotic cerebral ischemia. METHODS We studied 15 patients with angiographically-confirmed unilateral severe occlusive lesions (occlusion or > 70% stenosis) in the carotid system. IMZ SPECT images obtained 180 min after injection of 167-222 MBq IMZ were analyzed. The regional cerebral blood flow and perfusion reserve were evaluated for comparison with IMZ SPECT findings, using the split-dose 123I-iodoamphetamine (IMP) SPECT method, coupled with intravenous injection of 1 g acetazolamide. On both SPECT images, the count ratio of the affected to the nonaffected whole MCA territory (A/NA ratio) and of the contralateral to the ipsilateral cerebellar cortex (C/I ratio) were determined. RESULTS The A/NA ratio with IMZ was significantly higher than that with IMP (94.5% +/- 6.2% versus 91.4% +/- 6.6%, p < 0.005), although a significantly positive correlation was found between these two ratios (r = 0.854, p < 0.0001). The C/I ratio with IMP was decreased significantly in 5 patients compared with that in normal subjects, whereas the C/I ratio with IMZ was decreased in only 1 patient. There was no significant correlation between the A/NA ratio with IMZ and the perfusion reserve in the affected MCA territory. In 2 of 5 patients with a decreased A/NA ratio (<90%) with IMZ, decreased blood flow with preserved perfusion reserve and cerebral hemispheric atrophy were observed, which suggested the influence of neuronal loss due to chronic ischemia. CONCLUSION These findings indicate that IMZ SPECT, which provides new information regarding neuronal damage after ischemic insult to the brain, is useful for evaluating thrombotic cerebral ischemia.
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Affiliation(s)
- H Moriwaki
- First Department of Internal Medicine, Osaka University Medical School, Suita, Japan
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Watanabe Y, Hashikawa K, Moriwaki H, Oku N, Seike Y, Kodaka R, Ono J, Uehara T, Kusuoka H, Nishimura T. SPECT findings in mitochondrial encephalomyopathy. J Nucl Med 1998; 39:961-4. [PMID: 9627326] [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: 02/07/2023] Open
Abstract
UNLABELLED We investigated the alterations in regional cerebral blood flow (rCBF) in mitochondrial encephalomyopathy (MEM), using [123I]N-isopropyl-p-iodoamphetamine (IMP) or 99mTc-hexamethyl propyleneamine oxime SPECT in 10 MEM patients. METHODS Four of the patients had MEM with lactic acidosis and strokelike episodes (MELAS), 2 had Kearns-Sayre syndrome (KSS), 1 had myoclonic epilepsy with ragged red fibers (MERRF) and 3 had cytochrome C oxidase deficiency (CCOD). Cerebral perfusion reserve was obtained from 6 patients (3 MELAS, 1 MERRF, 1 KSS, 1 CCOD) for a comparative analysis using the split-dose 123I-IMP SPECT method before and after the injection of acetazolamide. RESULTS All patients with MELAS showed focal hypoperfusion in the parietal and/or occipital lobes. Follow-up studies (3 MELAS patients) revealed extension or improvement in the abnormal perfusion. The hypoperfused lesions were correlated with abnormal CT/MRI findings. Perfusion was normal in 1 MERRF, 2 KSS and 3 CCOD patients, whereas CT/MRI findings in 1 MERRF, 1 KSS and 1 CCOD patient were abnormal. The cerebral perfusion reserve in 3 MELAS patients was decreased significantly compared with that in patients with other types of MEM (MELAS 7.4%, other MEM 33.8%; p < 0.05). CONCLUSION The rCBF was altered specifically in patients with MELAS, suggesting that brain perfusion SPECT will be useful in diagnosing and assessing such patients. The decreased cerebral perfusion reserve in patients with MELAS may represent an important feature of the pathogenesis of the strokelike episodes. The SPECT findings of patients with other types of MEM (MERRF, KSS and CCOD) were normal.
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Affiliation(s)
- Y Watanabe
- Department of Radiology, National Toneyama Hospital, Osaka University Medical School, Suita, Japan
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Nishio S, Yokoyama M, Iwata H, Takeuchi M, Kamei O, Sugamoto T, Seike Y, Ochi K, Kin M, Aoki K, Nabeshima S, Takeda H, Takei S. [Obesity as one of the risk factors for urolithiasis]. Nihon Hinyokika Gakkai Zasshi 1998; 89:573-80. [PMID: 9666683 DOI: 10.5980/jpnjurol1989.89.573] [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: 02/08/2023]
Abstract
BACKGROUND It is well known that many diseases may be associated with obesity resulting from an energy-rich diet, and that a westernized diet may increase the incidence of urinary stone formation. To evaluate degree of obesity, we investigated body mass index (BMI) in patients with calcium containing upper urinary stones and examined their blood with regard to lipid metabolism. METHODS Between July 1994 and December 1995, we analyzed 332 fresh renal-stone formers (253 males and 79 females) who visited 7 hospitals located in Ehime prefecture. As a control, 949 residents older than 20 years (387 males and 562 females) of the same prefecture were also examined by the annual Ehime prefecture office report of 1994. Body mass index as degree of obesity, stone-recurrence, blood test and other complicated diseases were examined. RESULTS In male stone formers the rate of obesity was significantly higher than that of control males (p < 0.001). The differences were seen only in their twenties and fifties. Furthermore, among male stone formers the rate of obesity was significantly higher in recurrent stone formers than in single stone formers (p < 0.05). On the other hand, in female, there was no significant difference in the rate of obesity between stone formers and controls. No difference was seen between recurrent stone formers and single stone formers. In the blood test, there was no differences in the level of calcium, phosphate and uric acid between stone formers and controls. The level of cholesterol and triglyceride in male were significantly higher in controls (p < 0.01) and there was no difference in the level of high density lipoprotein (HDL) between stone formers and controls. Among the stone formers, 48 males (20.0%) and 17 females (21.5%) had other diseases. The rate of complicated diseases was similar to that of controls and no specific diseases in the stone formers were identified. CONCLUSION Our report suggested that obesity in male should be considered as a risk factor for calcium containing stone formation.
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Affiliation(s)
- S Nishio
- Department of Urology, Ehime University School of Medicine, Japan
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Hashikawa K, Yamamoto S, Seike Y, Matsumoto M, Oku N, Kanno I, Hori M, Nishimura T. The usefulness of a front shield placed between the detectors and the body in the brain activation study by using 3D-PET. Neuroimage 1998. [DOI: 10.1016/s1053-8119(18)31462-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Moriwaki H, Matsumoto M, Hashikawa K, Oku N, Ishida M, Seike Y, Watanabe Y, Hougaku H, Handa N, Nishimura T. Hemodynamic aspect of cerebral watershed infarction: assessment of perfusion reserve using iodine-123-iodoamphetamine SPECT. J Nucl Med 1997; 38:1556-62. [PMID: 9379192] [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: 02/05/2023] Open
Abstract
UNLABELLED The mechanism whereby watershed (WS) infarcts develop remains controversial, although a hemodynamic cause is usually assumed. The aim of this study was to investigate the relationship between the site of WS infarcts and the hemodynamic status of the cerebral circulation. METHODS From among 96 consecutive patients with angiographically confirmed unilateral major cerebral artery obstruction (occlusion or > 70% stenosis), we investigated 29 patients with supratentorial WS infarcts on magnetic resonance imaging. The regional cerebral blood flow and perfusion reserve were quantified using the split-dose [123I]iodoamphetamine SPECT method, coupled with intravenous injection of 1 g of acetazolamide. Seven patients had a cortical WS infarct between the superficial branches of the anterior and middle cerebral arteries (MCAs) or between the middle and posterior cerebral arteries (Group C), and 22 had a deep WS infarct between the superficial branches and deep penetrating arteries of the MCA (Group D). Moreover, the patients in Group D were classified into two subgroups, i.e., Type A (n = 12), with lesions lying in the centrum semiovale above the level of the lateral ventricles, and Type B (n = 10), with lesions lying in the corona radiata adjacent to the lateral ventricles. RESULTS Comparison of the Type of WS infarct with the clinical course of onset showed that sudden onset was more frequent in Group C than in Group D (p < 0.05). The perfusion reserve in the affected MCA territory in Group D (20.1% +/- 15.6%) was significantly lower than that in Group C (43.8% +/- 10.8%; p < 0.01) and that in 20 hemispheres (10 control subjects) without a major arterial lesion (54.7% +/- 16.4%; p < 0.01). Among the Group D patients, the patients with Type A infarcts showed a significantly lower perfusion reserve compared with those with Type B infarcts (p < 0.05). CONCLUSION Patients with deep WS infarcts, especially Type A infarcts, showed severe hemodynamic impairment, whereas patients with cortical WS infarcts showed preserved perfusion reserve which appeared to be secondary to the embolism. The mechanism of development of WS infarcts is multifactorial, and distinguishing among these WS infarcts and from other types of infarct is important, because different pathogenic mechanisms require different therapeutic strategies.
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Affiliation(s)
- H Moriwaki
- First Department of Medicine, Osaka University Medical School, Suita, Japan
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Oku N, Matsumoto M, Hashikawa K, Moriwaki H, Ishida M, Seike Y, Terakawa H, Watanabe Y, Uehara T, Nishimura T. Intra-individual differences between technetium-99m-HMPAO and technetium-99m-ECD in the normal medial temporal lobe. J Nucl Med 1997; 38:1109-11. [PMID: 9225799] [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: 02/04/2023] Open
Abstract
UNLABELLED Regional distributions of 99mTc-hexamethyl propyleneamine oxime (99mTc-HMPAO) and 99mTc-ethyl cysteinate dimer (99mTc-ECD) were compared in the normal brain. METHODS Six paid, healthy volunteers (mean age 26 yr) had high-resolution neuroperfusion SPECT using both 99mTc-HMPAO and 99mTc-ECD on separate days. RESULTS Regional distribution of the two tracers differed. Technetium-99m-HMPAO accumulated more in the thalamus, frontal lobe, temporal lobe and cerebellum than 99mTc-ECD, which accumulated more in the occipital and parietal lobes. There was a considerable difference in the accumulation of the two tracers in the medial temporal lobe. The percent accumulations of 99mTc-HMPAO and 99mTc-ECD in the medial temporal lobe compared with the mean global cerebral cortical accumulation were 93.9% +/- 2.4% and 83.1% +/- 4.1% (mean +/- s.d.), respectively. CONCLUSION The results suggest that 99mTc-HMPAO and 99mTc-ECD require specific and separate criteria for diagnosing temporal lobe pathologies, such as dementia and temporal lobe epilepsy.
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Affiliation(s)
- N Oku
- First Department of Medicine, Osaka University Medical School, Japan
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Fukuchi K, Hashikawa K, Seike Y, Moriwaki H, Oku N, Ishida M, Fujita M, Uehara T, Tanabe H, Kusuoka H, Nishimura T. Comparison of iodine-123-iomazenil SPECT and technetium-99m-HMPAO-SPECT in Alzheimer's disease. J Nucl Med 1997; 38:467-70. [PMID: 9074540] [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: 02/04/2023] Open
Abstract
UNLABELLED This study was designed to elucidate a central type of benzodiazepine (Bz) receptor distribution in patients with Alzheimer's disease using SPECT with [123I]iomazenil (IMZ). METHODS Eight patients with probable Alzheimer's disease were studied. Benzodiazepine receptor imaging was performed 15 min (early) and 180 min (delayed) after intravenous administration of 167 MBq IMZ, sequentially, using hexamethylpropylene amine oxime (HMPAO) SPECT to evaluate regional cerebral perfusion. RESULTS Early IMZ-SPECT depicted areas of reduced uptake in sites of decreased cerebral blood flow (CBF), but each area of decreased uptake was extended wider than the area of hypoperfusion. Delayed IMZ-SPECT images demonstrated a similar pattern of decreased area of CBF; the affected region in Bz receptor bindings, however, was clearer and broader compared with that in either HMPAO-SPECT or early IMZ-SPECT. In comparison with the uptakes for the normal cerebral hemisphere (ratio to the contralateral cerebellum) in patients with unilateral cerebral infarction as a control group (n = 4), the patients with Alzheimer's disease showed distinctive bilateral frontal or parietal defects (p < 0.05). CONCLUSION Brain SPECT using IMZ may be more sensitive than CBF images in patients with Alzheimer's disease.
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Affiliation(s)
- K Fukuchi
- First Department of Internal Medicine, Faculty of Health and Sports Science, Osaka University Medical School, Japan
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Moriwaki H, Matsumoto M, Hashikawa K, Oku N, Ishida M, Seike Y, Fujita M, Fukuchi K, Watanabe Y, Terakawa H, Uehara T, Nishimura T. [Evaluation of 123I-iomazenil SPECT in patients with ischemic cerebrovascular disease: comparative study with 123I-IMP SPECT]. Kaku Igaku 1996; 33:587-97. [PMID: 8741503] [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: 02/01/2023]
Abstract
Clinical evaluation of 123I-iomazenil, a new imaging agent for central-type benzodiazepine receptors with SPECT, was performed in patients with ischemic cerebrovascular disease. We investigated 15 patients with angiographically-proven severe occlusive lesions (occlusion or > 70% stenosis) in the unilateral carotid system. 123I-iomazenil SPECT images were compared with cerebral blood flow (CBF) images and the cerebral perfusion reserve, which were measured using the "split dose 123I-IMP SPECT method" before and after the intravenous injection of 1 g of acetazolamide. For the detection of ischemic lesions, CBF images were superior to 123I-iomazenil images based on visual analysis. Regarding the count ratio of the affected MCA territory to the non-affected (L/N), 123I-IMP was lower than 123I-iomazenil in most of the cases. In five patients showing "crossed cerebellar diaschisis" by 123I-IMP, asymmetry of the cerebellar accumulation was observed in only one patient with 123I-iomazenil, which was less prominent than with 123I-IMP. There was no significant correlation between the L/N ratio with 123I-iomazenil and the cerebral perfusion reserve in the affected MCA territory. However, in some cases showing a decreased L/N ratio (< 90%) with 123I-iomazenil, a decreased CBF with normal perfusion reserve and cerebral hemi-atrophy were observed with 123I-IMP and MRI, which suggested the influence of neuronal loss due to chronic ischemia. These results indicate that 123I-iomazenil SPECT, which provides new information regarding neuronal loss due to ischemic damage to the brain, is useful for the evaluation of ischemic cerebrovascular disease.
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Affiliation(s)
- H Moriwaki
- Division of Nuclear Medicine, School of Medicine, Osaka University
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Oku N, Matsumoto M, Hashikawa K, Moriwaki H, Seike Y, Ishida M, Handa N, Kamada T, Nishimura T. Super-early iodine-123-iodoamphetamine SPECT imaging of human primary motor cortex. J Nucl Med 1995; 36:2180-5. [PMID: 8523101] [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: 01/31/2023] Open
Abstract
UNLABELLED This study was designed to visualize the motor function area related to finger movements in normal human brain using super-early (first 640 sec of acquisition) [123l]iodoamphetamine ([123I]IMP) SPECT. METHODS Seven healthy male volunteers performed paired, isolated baseline and task sessions. The task was a right thumb-to-fingers opposition task, which was loaded for the initial 11 min of the session. A high-performance, four-head SPECT camera was used. At each session, administration of 222 MBq [123I]IMP was followed by 16 serial 160-sec dynamic SPECT acquisitions. To obtain matched brain anatomical images, MRI was also performed using the same slice formation as in the SPECT study. After image reconstruction, ROIs were set on bilateral sensorimotor hand areas (SMHA), the supplementary motor area (SMA), the frontal, temporal and occipital lobes and the cerebellar hemispheres. The percent increase of ROI activity (%INC) in the task session compared with that in the baseline session was calculated in each ROI after normalization to the global brain radioactivity. RESULTS There was significant activation of the left SMHA by the task, the amplitude of which was maximal in the initial phase of dynamic images (the super-early phase). This area was located in the left peri-central area identified on the analogous slice in the MR image. The left SMHA showed gradual and statistically significant decrease of %INC during the three phases. CONCLUSION Super-early [123I]IMP may be used to identify the primary motor cortex and to evaluate its function in some pathological conditions.
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Affiliation(s)
- N Oku
- First Department of Medicine, Osaka University Medical School, Japan
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Hashikawa K, Matsumoto M, Moriwaki H, Oku N, Okazaki Y, Seike Y, Uehara T, Tanabe H, Ohie Y, Kamada T. Three-dimensional display of surface cortical perfusion by SPECT: application in assessing Alzheimer's disease. J Nucl Med 1995; 36:690-6. [PMID: 7699466] [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: 01/26/2023] Open
Abstract
UNLABELLED To better understand cortical perfusion, we developed a method for a three-dimensional display technique with 99mTc-hexamethylpropyleneamine oxime (HMPAO) SPECT. METHODS Twelve patients with higher cortical dysfunction due to Alzheimer's disease and 18 age-matched controls were examined. Data acquisition was performed after intravenous injection of 740 MBq of 99mTc-HMPAO. After reconstructing the transaxial images, the three-dimensional images were obtained by modified volume rendering, where the surfaces were displayed in the corresponding colors as the maximum cortical value within a depth of 2 cm. RESULTS In the control studies, almost all surface cortices were over 60% of the maximum cerebellar value. In Alzheimer's disease patients, areas of perfusion below 60% were detected in the temporo-parietal lesions and frontal lobe lesions in 6 of 12. These findings correlated with the neurological dysfunction. CONCLUSION This method provides realistic three-dimensional information about surface cortical perfusion, which was found to be useful in clinical investigations of higher cortical dysfunction due to degenerative or cerebrovascular diseases.
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Affiliation(s)
- K Hashikawa
- Department of Nuclear Medicine, Osaka University Medical School, Suita, Japan
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Oku N, Matsumoto M, Hashikawa K, Moriwaki H, Okazaki Y, Seike Y, Handa N, Uehara T, Kamada T, Nishimura T. Carbon dioxide reactivity by consecutive technetium-99m-HMPAO SPECT in patients with a chronically obstructed major cerebral artery. J Nucl Med 1994; 35:32-40. [PMID: 8271057] [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: 01/29/2023] Open
Abstract
UNLABELLED In the management of major cerebral artery obstruction, cerebral perfusion reserve is key to introducing cerebral revascularization surgery. The purpose of this study was to evaluate the feasibility of assessing cerebral perfusion reserve by consecutive 99mTc-hexamethyl-propyleneamine oxime (99mTc-HMPAO) SPECT with 5% carbon dioxide (CO2) inhalation. METHODS The CO2 inhalation and consecutive 99mTc-HMPAO SPECT study was performed on 30 chronic ischemic cerebrovascular disease patients with unilateral major cerebral artery obstruction and on 27 patients without. CO2 reactivity was expressed as the percent increase of 99mTc-HMPAO accumulation from the baseline (%Change) and as a constant k' that was the ratio of 99mTc-HMPAO accumulation per 1 mmHg change of end-tidal CO2 tension by exponential curve fitting. RESULTS The mean %Change and k' in the middle cerebral artery (MCA) territory on the side without an obstructive lesion or in the cerebellum ranged from 10.0% to 11.1% and from 0.98% to 1.13% per mmHg, respectively. In the MCA territory, an obstructive lesion was noted in 5.9% versus 0.54% per mmHg in the contralateral MCA territory (p < 0.01). Eleven of 30 patients with major cerebral artery obstruction revealed significant asymmetry in the k' value between bilateral MCA territories. CONCLUSION The results showed compromised cerebral perfusion reserve in the obstructed major cerebral artery territory. The present method was proven clinically useful for evaluating cerebral perfusion reserve in patients with unilateral major cerebral artery obstruction.
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Affiliation(s)
- N Oku
- First Department of Internal Medicine, Osaka University Medical School, Japan
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Takeda S, Kuwata K, Seike Y, Yamazaki Y, Yamazaki H, Hongyo T, Lee S, Moriguchi S, Miki Y, Kobayashi Y. [A case of double neoplasms--small cell carcinoma in the mediastinum and squamous cell carcinoma of the esophagus]. Gan No Rinsho 1987; 33:949-54. [PMID: 3613117] [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: 01/06/2023]
Abstract
A 62-year-old Chinese man was admitted to our hospital because of dysphagia and hoarseness. Chest X-rays showed a superior mediastinal mass, and an operation for the removal of this mediastinal tumor was performed. The histological diagnosis indicated a small cell carcinoma, probably arising from the lung. He was readmitted to our clinic one year later with a complaint of dysphagia due to an esophageal cancer. Radical surgery for the esophageal cancer was performed, and the histological findings showed a well differentiated squamous cell carcinoma. The histogenesis of this carcinoma was considered to be independent of the earlier mediastinal tumor.
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Takeda S, Seike Y, Yamazaki Y, Kuwata K, Kobayashi Y. [An operative case of mediastinal metastasis of primary pleural melanoma]. Kyobu Geka 1987; 40:577-9. [PMID: 3626226] [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: 01/06/2023]
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Kagotani K, Monden Y, Nakahara K, Fujii Y, Seike Y, Kitamura S, Masaoka A, Kawashima Y. Anti-acetylcholine receptor antibody titer with extended thymectomy in myasthenia gravis. J Thorac Cardiovasc Surg 1985; 90:7-12. [PMID: 4010323] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Twenty-four patients with myasthenia gravis of Osserman's generalized type underwent extended thymectomy through a sternal-splitting approach. Their clinical responses to thymectomy and postoperative changes in anti-acetylcholine receptor antibody titers were evaluated. The follow-up time ranged from 1 month to 7 years and 7 months (average, 36 months). Six patients (25%) had remissions and 17 patients (71%) were improved after operation. The preoperative anti-acetylcholine receptor antibody titers dropped significantly after operation (p less than 0.001). The postoperative reduction in these titers correlated with the time course after operation (p less than 0.05). Their postoperative reduction was significantly greater in the six patients having remissions than in the 15 having marked (p less than 0.02) and the six having moderate improvement (p less than 0.005). This study has revealed that anti-acetylcholine receptor antibody titer in plasma declines progressively after thymectomy, and the postoperative reduction of this titer correlates with the clinical effect of thymectomy.
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Abstract
Among 137 thymectomized patients with nonthymomatous myasthenia gravis (MG), six were reoperations. Thymectomy had initially been performed by the transcervical approach, but was ineffective. Extended thymectomy was then performed by median sternotomy. The reoperations revealed residual thymus (average weight, 19 gm) in all cases. Postoperative courses were favorable in three patients and unfavorable in three others. The latter had received high-dose steroid therapy before the second operation. We conclude that total thymectomy by the transcervical approach is almost impossible, and that reoperation may accelerate improvement in some cases.
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Masaoka A, Maeda M, Monden Y, Nakahara K, Oshima S, Seike Y, Nakaoka K, Tanioka T, Kagotani K, Kawashima Y. [Follow-up study of thymomas (author's transl)]. Nihon Kyobu Geka Gakkai Zasshi 1980; 28:1061-9. [PMID: 7462736] [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: 01/25/2023]
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