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Recurrent infectious subcapsular renal hematoma accompanied by microaneurysm

Toshikazu Ozeki, Junichiro Yamamoto, Shigeki Yamamoto, Chisato Shigematsu, Masashi Tsuji
2018 CEN Case Reports  
An 80-year-old woman was admitted to the hospital complaining of loss of appetite. 10 days earlier, her oral intake gradually decreased with no other specific symptoms, such as abdominal pain, nausea, vomiting, headache, or low back pain. Abdominal computed tomography (CT) scan revealed a left subcapsular renal hematoma. We suspected infective subcapsular renal hematoma, so percutaneous needle aspiration and drainage were performed. Intravenous sulbactam-ampicillin was started immediately. On
more » ... y 9 after admission, repeat CT scan revealed the subcapsular hematoma had reduced in size. The drain was removed, and intravenous antibiotics were discontinued. Follow-up CT scan on day 21 revealed increased subcapsular renal hematoma size. The patient also had high fever. Suspecting recurrence of infective subcapsular renal hematoma, we repeated the drainage of the hematoma and restarted intravenous antibiotics. Renal arteriography showed a renal artery microaneurysm and her condition improved with renal artery embolization. Renal arteriography was useful for detecting renal artery microaneurysm in infective subcapsular renal hematoma that did not resolve after antibiotic treatment and drainage.
doi:10.1007/s13730-018-0305-6 pmid:29344911 pmcid:PMC5886936 fatcat:bidsuxdt4nbgxg7lfevomycxg4

Participation Report of the IUMS2011

YAMAMOTO Shigeki
2011 Journal of Veterinary Epidemiology  
Yamamoto Holzapfel Cole ICMSF Biavati Campylobacter jejuni Beuchat Ryu Salmonella Typhimurium : * 158 8501 1 18 1  ...  Beuchat 5 Receptor Diversity and phase-variable resistance of Salmonella enterica serovar Typhimurium against Bacterio- phages Sangryeol Ryu 6 Recent trend of Food borne diseases in Japan Shigeki  ... 
doi:10.2743/jve.15.121 fatcat:bzciycdrpzgixmf54g2zo3qkb4

Clostridium perfringensEnterotoxin Interacts with Claudins via Electrostatic Attraction

Jun Kimura, Hiroyuki Abe, Shigeki Kamitani, Hirono Toshima, Aya Fukui, Masami Miyake, Yoichi Kamata, Yoshiko Sugita-Konishi, Shigeki Yamamoto, Yasuhiko Horiguchi
2009 Journal of Biological Chemistry  
Clostridium perfringens enterotoxin (CPE), a causative agent of food poisoning, is a pore-forming toxin disrupting the selective permeability of the plasma membrane of target cells, resulting in cell death. We previously identified claudin as the cell surface receptor for CPE. Claudin, a component of tight junctions, is a tetra-transmembrane protein and constitutes a large family of more than 20 members, not all of which serve as the receptor for CPE. The mechanism by which the toxin
more » ... es the sensitive claudins is unknown. In this study, we localized the region of claudin responsible for interaction with CPE to the C-terminal part of the second extracellular loop, and found that the isoelectric point of this region in sensitive claudins was higher than insensitive claudins. Amino-acid substitutions to lower the pI resulted in reduced sensitivity to CPE among sensitive claudins, whereas substitutions to raise the pI endowed CPE-insensitive claudins with sensitivity. The steric structure of the claudin-binding domain of CPE reveals an acidic cleft surrounded by Tyr306, Tyr310, Tyr312, and Leu315, which were reported to be essential for interaction with the sensitive claudins. These results imply that an electrostatic attraction between the basic claudin region and the acidic CPE cleft is involved in their interaction. http://www.jbc.org/cgi/
doi:10.1074/jbc.m109.051417 pmid:19903817 pmcid:PMC2804187 fatcat:kqjsyp72pzewleljdwlosepkbq

Current Situation of Bovine Spongiform Encephalopathy (2018)

Shigeki YAMAMOTO
2018 Journal of Veterinary Epidemiology  
Bovine Spongiform Encephalopathy (BSE) was first reported from the United Kingdom (UK) in 1986. Approximately 190,000 BSE cases were reported in the world, about 185,000 cases were detected in UK so far. BSE were transferred among cattle by Meat and Bone Meal with an inadequate heat treatment produced from Specified Risk Materials (SRM) of BSE cattle. Infectious agent is a proteinaceous infectious particles (prion), these are causative agents of BSE and also of variant Creutzfeldt-Jakob Disease
more » ... (vCJD) in human. 178 cases of vCJD cases were reported in the world since 1995. One case was also reported in Japan. 130 atypical BSE cases were reported in the world. Atypical BSE has a different western blot pattern from typical BSE. There are two patterns, High and Low types. Atypical BSE case was borne sporadically, and onset of BSE symptoms were detected older than typical BSE case. Two L type cases were detected in Japan in 16,100,000 cattle tested so far. To prevent dissemination of BSE in the world, feed ban which is not fed SRM to cattle was introduced. 65 BSE cases were borne after real feed ban in the world. No typical BSE case was reported in 2017, therefore, typical BSE case will be eradicated near future in the world. 【牛海綿状脳症とは】 牛海綿状脳症(以下 BSE : Bovine Spongiform Encephalopathy)の最新事情を述べる前に BSE について振り返っ ておきたい 1) 。 BSE は英国で 1986 年に初めて報告された。BSE は異常 プリオンタンパク質と呼ばれる病原体が主に脳に蓄積する ことによって,神経細胞が壊死し,空胞変性を起こし,脳 の組織がスポンジ状になる。その結果,異常行動,運動失 調等の中枢神経症状を呈し,死に至ると考えられている。 プリオンとは感染性を有するタンパク質様の病原体を意 味する造語(proteinaceous infectious particles)で,牛海綿 状脳症(BSE)やヒトのクロイツフェルト・ヤコブ病(CJD) の原因物質とされている。 ヒトや動物の体内にはもともと正常プリオンタンパク質 が存在し,病原体である異常プリオンタンパク質が体内に 侵入すると,正常プリオンタンパク質が異常プリオンタン パク質に変性する。両者のアミノ酸配列は同じであるが, 立体構造が正常プリオンタンパク質ではαへリックス構造 であるのに対し,異常プリオンタンパク質ではβシート構 造になっていることが知られている。 牛から牛に BSE がまん延したのは,BSE 感染牛を原料 とした肉骨粉を牛の飼料として使っていたことが原因と考 えられている。英国で異常プリオンタンパク質に高度に汚 染された肉骨粉により多数の BSE 感染牛が確認されてい た時期における平均潜伏期間は,5 年から 5.5 年と推測さ れている。 国際獣疫事務局(OIE)の報告によれば,世界 28 か国 で約 19 万頭(2018 年 1 月時点)の BSE が発生し,英国 連絡先:山本茂貴* 内閣府食品安全委員会 〒107⊖6122 東京都港区赤坂 5⊖2⊖20 赤坂パークビル 22 階 Tel : 03⊖6234⊖1061
doi:10.2743/jve.22.15 fatcat:g55ogsqyezg6joesz45tjujsoa

Epidemiology Education for Member of Society

Shigeki YAMAMOTO
2008 JAPAN JOURNAL OF VETERINARY INFORMATICS  
doi:10.2743/jve.11.121 fatcat:gbgd4coxvvhizlrmg3fvnvhsnm

Little Higgs with T-parity measurements at the ILC [article]

Eriko Kato, Masaki Asano, Keisuke Fujii, Shigeki Matsumoto, Yosuke Takubo, Hitoshi Yamamoto
2012 arXiv   pre-print
The Littlest Higgs with T-parity Model (LHT) is one of the attractive candidates of physics beyond the Standard Model. In this study we focus on heavy gauge bosons and heavy leptons that LHT imposes, which are detectable at ILC. The mass and couplings of these particles possess important information of the model's mass generation mechanism and how they interact with other particles. Precision measurement will be essential among verifying the model. We will address the measurement accuracy of
more » ... tle Higgs particle masses, couplings and model parameters at ILC.
arXiv:1203.0762v1 fatcat:e3vagwdkbnfq7jylvje6jxireq

Subarachnoidal fat droplet deposition and fat embolism syndrome

Keisuke Yamamoto, Shigeki Kushimoto
2017 BMJ Case Reports  
use and teaching without further permission For information on Institutional Fellowships contact consortiasales@bmjgroup.com Visit casereports.bmj.com for more articles like this and to become a Fellow Yamamoto  ... 
doi:10.1136/bcr-2017-221493 pmid:29066650 pmcid:PMC5665311 fatcat:f3l7qqobvjgl5g7efim6ihsmky

EFFECTS ON THE AKASHI KAIKYO BRIDGE

MAMORU YAMAGATA, MASAHIKO YASUDA, ATSUSHI NITTA, SHIGEKI YAMAMOTO
1996 Soils and Foundations  
\ The epicenter of the main shock of the 1995 Hyogoken-Nambu earthquake was very close to the construction site of the Akashi Kaikyo Bridge, which will be a three-span, two-hinge stiffening truss suspension bridge with a total length of 3,910 m upon completion. The bridge consists of tower foundations, anchorages, towers, cables and girder. At the time of the earthquake, the main cable installation had been completed and the working had reached the stage of cable squeezing. Immediately after
more » ... earthquake, a structural inspection, a survey of pier locations using an optical distance measuring instruments and a global positioning system and a geotechnical investigation were conducted. The basic information and technical data related to the earthquake and its impact including the displacements of the foundations on the Akashi Kaikyo Bridge are described in this paper.
doi:10.3208/sandf.36.special_179 fatcat:r5njwso2xnew3omvkabgm5bkti

CSF Dynamics and Normal-pressure Hydrocephalus

Shigeki Yamada, Masatsune Ishikawa, Kazuo Yamamoto
2018 Japanese Journal of Neurosurgery  
Fluids Barriers CNS 12:15, 2015. 8) Ishikawa M, Yamada S, Yamamoto K:Dilated Perivascular Spaces in the Centrum Semiovale Begin to Develop in Mid- dle Age.  ...  Semin Ultrasound CT MR 37:84-91, 2016 20) Yamada S, Ishikawa M, Yamamoto K:Comparison of CSF Distribution between Idiopathic Normal Pressure Hydrocephalus and Alzheimer Disease.  ... 
doi:10.7887/jcns.27.581 fatcat:vedaw7pxijf4pp2tg2nuqlzqra

Degradation of Imazosulfuron in Flooded Soils

Kazuki MIKATA, Akihiro YAMAMOTO, Shigeki TASHIRO
1996 Journal of pesticide science  
Degradation of Imazosulfuron, 1-(2-chloroimidazo [1,2-a] pyridin-3-ylsulfonyl)-3-(4,6dimethoxypyrimidin-2-yl)urea, in the flooded soils was studied under laboratory conditions using the compounds labeled with 14C at imidazopyridine and pyrimidine rings. Imazosulfuron showed significant difference in degradation rates between aerobic and anaerobic conditions, and disappeared from the soils with half-lives of approximately 60 and 3 days, respectively. Imazosulfuron was subjected to the cleavage
more » ... sulfonylurea bond and monodemethylation to give 2-amino-4, 6-dimethoxypyrimidine (ADPM), 2chloroimidazo [1,2-a] pyridine-3-sulfonamide (IPSN) and 1-(2-chloroimidazo [1, 2-a] pyridin-3ylsulfonyl)-3-(4-hydroxy-6-methoxypyrimidin-2-yl)urea (HMS) as the major degradation products. 14Ccarbon dioxide gradually increased with time accounting for 11. 0-48. 3% and 1. 6-4. 4% under aerobic and anaerobic conditions, respectively, for the period of 360 days. In the sterilized soils under aerobic and anaerobic conditions 30 days after the treatment, the degradation rate of imazosulfuron and amounts of degradation products except for HMS were similar to those observed in nonsterilized soils under aerobic conditions 30 days after the treatment. Imazosulfuron in the soils under aerobic conditions gradually disappeared with time by the hydrolysis of the sulfonylurea bond to give ADPM and IPSN, and finally mineralized to carbon dioxide. On the other hand, Imazosulfuron under anaerobic conditions was degraded by soil microorganisms, followed by conversion to soil organic matters.
doi:10.1584/jpestics.21.171 fatcat:n4avv2as65dfrih3chifte7nfe

Magnetic Circular Dichroism of Porphyrin Lanthanide M3+Complexes

Valery Andrushchenko, Daniele Padula, Elena Zhivotova, Shigeki Yamamoto, Petr Bouř
2014 Chirality  
Lanthanide complexes exhibit interesting spectroscopic properties yielding many applications as imaging probes, natural chirality amplifiers, and therapeutic agents. However, many properties are not fully understood yet. Therefore, we applied magnetic circular dichroism (MCD) spectroscopy, which provides enhanced information about the underlying electronic structure to a series of lanthanide compounds. The metals in the M 3+ state included Y, La, Eu, Tb, Dy, Ho, Er, Tm, Yb, and Lu; the spectra
more » ... ere collected for selected tetraphenylporphin (TPP) and octaethylporphin (OEP) complexes in chloroform. While the MCD and UV-VIS absorption spectra were dominated by the porphyrin signal, metal binding significantly modulated them. MCD spectroscopy was found to be better suited to discriminate between various species than absorption spectroscopy alone. The main features and trends in the lanthanide series observed in MCD and absorption spectra of the complexes could be interpreted at the Density Functional Theory (DFT) level, with effective core potentials on metal nuclei. The sum over state (SOS) method was used for simulation of the MCD intensities. The combination of the spectroscopy and quantum-chemical computations is important for understanding the interactions of the metals with the organic compounds.
doi:10.1002/chir.22365 pmid:25116761 fatcat:duhp3kwvtje7lpxs6ezqdktu3i

Calculation of Vibrational Spectra of Large Molecules from Their Fragments [chapter]

Shigeki Yamamoto, Petr Bouř
2017 Frontiers of Quantum Chemistry  
Vibrational spectroscopies proved extremely useful to study a broad range of molecules, including their structures and interactions. Additional structural sensitivity is provided by polarized techniques measuring different absorption or scattering of left-and right circularly polarized light. The vibrational optical activity (VOA) methods include Raman optical activity (ROA) and vibrational circular dichroism (VCD). Interpretation of the spectra, however, is largely dependent on time-consuming
more » ... uantum-chemical simulations limited by molecular size. To be able to handle at a reasonable precision large molecules, such as biologically relevant systems, we developed a simplified method of transfer of vibrational atomic properties from smaller fragments to the system of interest. The method found many successful applications in the past, including spectra of proteins and nucleic acids, and appears useful also in connection with the multi-level computational techniques in the foreseeable future. In this chapter, we discuss the theoretical whereabouts of the transfer method and its related computational algorithms and describe typical applications to large molecules.
doi:10.1007/978-981-10-5651-2_8 fatcat:sh5qlyv57nfp7onzyhfb3fpxiq

Veterinary Epidemiology in Public Health
公衆衛生分野における獣医疫学

Shigeki YAMAMOTO
2009 JAPAN JOURNAL OF VETERINARY INFORMATICS  
doi:10.2743/jve.13.16 fatcat:itcghjbwiregjmhhqsgabutium

Antinucleolar autoantibody induced in mice by mercuric chloride

Junzo SAEGUSA, Shigeki YAMAMOTO, Hiroshi IWAI, Katsumoto UEDA
1990 Industrial Health  
doi:10.2486/indhealth.28.21 pmid:1969857 fatcat:zmjuactvurhrrns3dkbmcqeake

卵におけるサルモネラの衛生管理
Hygienics Program of Salmonella in Egg

Shigeki YAMAMOTO
2008 Journal of Veterinary Epidemiology  
doi:10.2743/jve.11.111 fatcat:q4djfn2pjvbhbnm5truet32pvq
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