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Kazekawa K, Oka K, Aikawa H, Tomonaga M, Yoshimura S, Yoshioka T, Hosoda H. How to Embolize Wide-Necked Aneurysms? Interv Neuroradiol 2016; 5 Suppl 1:103-8. [DOI: 10.1177/15910199990050s119] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/1999] [Accepted: 09/30/1999] [Indexed: 11/16/2022] Open
Abstract
Novel endovascular approaches are needed for safer and more definitive treatment of wide-necked aneurysms, to overcome the limitations of the Guglielmi detachable coil (GDC) system and further, the application of this technique. The double GDC technique (DGT), for embolization of wide-necked aneurysms, and the combination of stent placement and coil deposition (CTSC) for management of fusiform aneurysms have been developed and their usefulness is reviewed. The DGT involves scaffolding of a GDC coil to form a stabilizing frame inside the aneurysmal neck and then positioning of a second coil to reinforce the first coil. After confirming the absence of coil herniation in the parent artery, both coils are released together. A patient with a wide-necked large aneurysm of the left internal carotid artery was treated using this technique, and followed up angiographically and clinically for a period of three months. The follow-up angiograms revealed complete embolization of the aneurysm. The patient had no neurological changes or adverse events during the procedure. The CTSC involves reconstructing the artery with a stent and packing the aneurysm lumen with GDCs through the stent interstices. A patient with a dissecting fusiform aneurysm of the vertebral artery associated with hypoplasia of the contralateral vertebral artery was treated using this technique to prevent rebleeding. His clinical course was uneventful over a six-month follow-up period. Angiography performed two months after the procedure confirmed excellent flow through the right vertebral artery and absence of filling of the daughter aneurysm.
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Yoshimura S, Yamada T. Parallel Partitioned Simulations of Real World’s Coupled Problems. PROCEEDINGS OF THE INDIAN NATIONAL SCIENCE ACADEMY 2016. [DOI: 10.16943/ptinsa/2016/48409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Lavine SD, Cockroft K, Hoh B, Bambakidis N, Khalessi AA, Woo H, Riina H, Siddiqui A, Hirsch JA, Chong W, Rice H, Wenderoth J, Mitchell P, Coulthard A, Signh TJ, Phatorous C, Khangure M, Klurfan P, Ter Brugge K, Iancu D, Gunnarsson T, Jansen O, Muto M, Szikora I, Pierot L, Brouwer P, Gralla J, Renowden S, Andersson T, Fiehler J, Turjman F, White P, Januel AC, Spelle L, Kulcsar Z, Chapot R, Biondi A, Dima S, Taschner C, Szajner M, Krajina A, Sakai N, Matsumaru Y, Yoshimura S, Diaz O, Lylyk P, Jayaraman MV, Patsalides A, Gandhi CD, Lee SK, Abruzzo T, Albani B, Ansari SA, Arthur AS, Baxter BW, Bulsara KR, Chen M, Almandoz JED, Fraser JF, Heck DV, Hetts SW, Hussain MS, Klucznik RP, Leslie-Mawzi TM, Mack WJ, McTaggart RA, Meyers PM, Mocco J, Prestigiacomo CJ, Pride GL, Rasmussen PA, Starke RM, Sunenshine PJ, Tarr RW, Frei DF, Ribo M, Nogueira RG, Zaidat OO, Jovin T, Linfante I, Yavagal D, Liebeskind D, Novakovic R, Pongpech S, Rodesch G, Soderman M, Ter Brugge K, Taylor A, Krings T, Orbach D, Biondi A, Picard L, Suh DC, Tanaka M, Zhang HQ. Training Guidelines for Endovascular Stroke Intervention: An International Multi-Society Consensus Document. INTERVENTIONAL NEUROLOGY 2016; 5:51-6. [PMID: 27610121 DOI: 10.1159/000444945] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Lavine SD, Cockroft K, Hoh B, Bambakidis N, Khalessi AA, Woo H, Riina H, Siddiqui A, Hirsch JA, Chong W, Rice H, Wenderoth J, Mitchell P, Coulthard A, Signh TJ, Phatorous C, Khangure M, Klurfan P, terBrugge K, Iancu D, Gunnarsson T, Jansen O, Muto M, Szikora I, Pierot L, Brouwer P, Gralla J, Renowden S, Andersson T, Fiehler J, Turjman F, White P, Januel AC, Spelle L, Kulcsar Z, Chapot R, Spelle L, Biondi A, Dima S, Taschner C, Szajner M, Krajina A, Sakai N, Matsumaru Y, Yoshimura S, Ezura M, Fujinaka T, Iihara K, Ishii A, Higashi T, Hirohata M, Hyodo A, Ito Y, Kawanishi M, Kiyosue H, Kobayashi E, Kobayashi S, Kuwayama N, Matsumoto Y, Miyachi S, Murayama Y, Nagata I, Nakahara I, Nemoto S, Niimi Y, Oishi H, Satomi J, Satow T, Sugiu K, Tanaka M, Terada T, Yamagami H, Diaz O, Lylyk P, Jayaraman MV, Patsalides A, Gandhi CD, Lee SK, Abruzzo T, Albani B, Ansari SA, Arthur AS, Baxter BW, Bulsara KR, Chen M, Delgado Almandoz JE, Fraser JF, Heck DV, Hetts SW, Hussain MS, Klucznik RP, Leslie-Mawzi TM, Mack WJ, McTaggart RA, Meyers PM, Mocco J, Prestigiacomo CJ, Pride GL, Rasmussen PA, Starke RM, Sunenshine PJ, Tarr RW, Frei DF, Ribo M, Nogueira RG, Zaidat OO, Jovin T, Linfante I, Yavagal D, Liebeskind D, Novakovic R, Pongpech S, Rodesch G, Soderman M, terBrugge K, Taylor A, Krings T, Orbach D, Biondi A, Picard L, Suh DC, Tanaka M, Zhang HQ. Training Guidelines for Endovascular Ischemic Stroke Intervention: An International Multi-Society Consensus Document. AJNR Am J Neuroradiol 2016; 37:E31-4. [PMID: 26892982 DOI: 10.3174/ajnr.a4766] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Yoshimura S, Miyazu M, Yoshizawa S, So M, Kusama N, Hirate H, Sobue K. Efficacy of an enteral feeding protocol for providing nutritional support after paediatric cardiac surgery. Anaesth Intensive Care 2015; 43:587-93. [PMID: 26310408 DOI: 10.1177/0310057x1504300506] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Enteral nutrition (EN) is considered to be a more appropriate method than parenteral feeding for providing nutrition to critically ill children. However, children who undergo cardiac surgery are at high risk of postoperative gastrointestinal complications during EN. The purpose of this study was to demonstrate the safety and efficacy of our EN feeding protocol after paediatric cardiac surgery through comparison between a single-centre prospective case series and historical cases. Forty-seven children who were admitted to the ICU after cardiac surgery were enrolled ('post group'). Data for these children were compared with a similar cohort of children who were admitted before the implementation of the feeding protocol (n=62; 'pre group'). The incidence of complications including vomiting, necrotising enterocolitis and hypoglycaemia; the time until the initiation of EN; and the changes in calories provided were compared between the groups. The frequency of vomiting was significantly lower in the post group than in the pre group (36.2% versus 58.0%, P=0.038), and necrotising enterocolitis did not occur in either group. The time until the initiation of EN and the total calories provided did not differ significantly; however, in the post group the proportion of energy provided by parenteral nutrition was significantly smaller (P <0.001), and provided by EN was significantly larger (P=0.003), than in the pre group. The frequency of hypoglycaemia was similar in both groups. This study showed that our EN protocol resulted in adjustments to calories provided via EN versus parenteral nutrition after paediatric cardiac surgery, and reduced the frequency of vomiting.
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Shindo S, Fujii K, Shirakawa M, Uchida K, Enomoto Y, Iwama T, Kawasaki M, Ando Y, Yoshimura S. Morphologic Features of Carotid Plaque Rupture Assessed by Optical Coherence Tomography. AJNR Am J Neuroradiol 2015; 36:2140-6. [PMID: 26272975 DOI: 10.3174/ajnr.a4404] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 03/23/2015] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Rupture of the plaque fibrous cap and subsequent thrombosis are the major causes of stroke. This study evaluated morphologic features of plaque rupture in the carotid artery by using optical coherence tomography in vivo. MATERIALS AND METHODS Thirty-six carotid plaques with high-grade stenosis were prospectively imaged by optical coherence tomography. "Plaque rupture" was defined as a plaque containing a cavity that had overlying residual fibrous caps. The fibrous cap thickness was measured at its thinnest part for both ruptured and nonruptured plaques. The distance between the minimum fibrous cap thickness site and the bifurcation point was also measured. Optical coherence tomography identified 24 ruptured and 12 nonruptured plaques. RESULTS Multiple ruptures were observed in 9 (38%) patients: Six patients had 2 ruptures in the same plaque, 2 patients had 3 ruptures in the same plaque, and 1 patient had 5 ruptures in the same plaque. Most (84%) of the fibrous cap disruptions were identified at the plaque shoulder and near the bifurcation point (within a 4.2-mm distance). The median thinnest cap thickness was 80 μm (interquartile range, 70-100 μm), and 95% of ruptured plaques had fibrous caps of <130 μm. Receiver operating characteristic analysis revealed that a fibrous cap thickness of <130 μm was the critical threshold value for plaque rupture in the carotid artery. CONCLUSIONS Plaque rupture was common in high-grade stenosis and was located at the shoulder of the carotid plaque close to the bifurcation. A cap thickness of <130 μm was the threshold for plaque rupture in the carotid artery.
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Terasaka K, Yoshimura S, Kato Y, Furuta K, Aramaki M, Morisaki T, Tanaka MY. High-impedance wire grid method to study spatiotemporal behavior of hot electron clump generated in a plasma. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2014; 85:113503. [PMID: 25430112 DOI: 10.1063/1.4901096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
High-impedance Wire Grid (HIWG) detector has been developed to study spatiotemporal behavior of a hot electron clump generated in an electron cyclotron resonance (ECR) plasma. By measuring the floating potentials of the wire electrodes, and generating structure matrix made of geometrical means of the floating potentials, the HIWG detector reconstructs the spatial distribution of high-temperature electron clump at an arbitrary instant of time. Time slices of the spike event in floating potential revealed the growth and decay process of a hot spot occurs in an ECR plasma.
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Miyagi S, Murata K, Sashino K, Sawamura S, Uruno S, Yoshimura S, Akahoshi E, Ishihara-Sugano M, Itoh S, Kurita N. Binding affinity between AhR and exogenous/endogenous ligands: molecular simulations and biological experiment. MOLECULAR SIMULATION 2014. [DOI: 10.1080/08927022.2014.899696] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Hayashi N, Watanabe Y, Adachi Y, Manabe N, Yoshimura S, Ehara I, Kato H. EP-1145: Development and assessment of an in-house program for calculating the monitor unit in proton therapy. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)33451-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Murayama A, Sugiyama N, Yoshimura S, Ishihara-Sugano M, Masaki T, Kim S, Wakita T, Mishiro S, Kato T. A subclone of HuH-7 with enhanced intracellular hepatitis C virus production and evasion of virus related-cell cycle arrest. PLoS One 2012; 7:e52697. [PMID: 23285155 PMCID: PMC3527576 DOI: 10.1371/journal.pone.0052697] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 11/19/2012] [Indexed: 11/19/2022] Open
Abstract
Hepatitis C virus (HCV) cell culture system with JFH-1 strain and HuH-7 cells enabled us to produce infectious HCV particles in vitro, and such system is useful to explore the anti-HCV compounds and to develop the vaccine against HCV. In the present study, we describe the derivation of a cell line that permits improved production of HCV particles. Specifically, we characterized several subclones that were isolated from the original HuH-7 cell line by limiting dilution. These HuH-7 subclones displayed a notable range of HCV production levels following transfection by full-genome JFH-1 RNA. Among these subclones, HuH-7T1 produced HCV more efficiently than other subclones and Huh-7.5.1 that is known to be highly permissive for HCV replication. Upon transfection with full-genome RNA, HCV production was increased ten-fold in HuH-7T1 compared to Huh-7.5.1. This increase in viral production correlated with increased efficiency of intracellular infectious virus production. Furthermore, HCV replication did not induce cell cycle arrest in HuH-7T1, whereas it did in Huh-7.5.1. Consequently, the use of HuH-7T1 as host cells could provide increased population of HCV-positive cells and elevated viral titer. In conclusion, we isolated a HuH-7 subclone, HuH-7T1, that supports efficient HCV production. High efficiency of intracellular infectious virus production and evasion of cell cycle arrest were important for this phenotype. We expect that the use of this cell line will facilitate analysis of the underlying mechanisms for HCV particle assembly and the cell cycle arrest caused by HCV.
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Toyoda K, Sato S, Koga M, Yamamoto H, Nakagawara J, Furui E, Shiokawa Y, Hasegawa Y, Okuda S, Sakai N, Kimura K, Okada Y, Yoshimura S, Hoshino H, Uesaka Y, Nakashima T, Itoh Y, Ueda T, Nishi T, Gotoh J, Nagatsuka K, Arihiro S, Yamaguchi T, Minematsu K. Run-up to participation in ATACH II in Japan. JOURNAL OF VASCULAR AND INTERVENTIONAL NEUROLOGY 2012; 5:1-5. [PMID: 23230457 PMCID: PMC3517030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Intracerebral hemorrhage (ICH) is a major cause of morbidity and mortality in Japan. Seventeen Japanese institutions are participating in the Antihypertensive Treatment for Acute Cerebral Hemorrhage (ATACH) II Trial (ClinicalTrials.gov no. NCT01176565; UMIN 000006526). This phase III trial is designed to determine the therapeutic benefit of early intensive systolic blood pressure (BP) lowering for acute hypertension in ICH patients. This report explains the long run-up to reach the start of patient registration in ATACH II in Japan, including our preliminary study, a nationwide survey on antihypertensive treatment for acute ICH patients, a multicenter study for hyperacute BP lowering (the SAMURAI-ICH study), revision of the official Japanese label for intravenous nicardipine, and construction of the infrastructure for the trial.
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Ishiguro M, Kawasaki K, Suzuki Y, Ishizuka F, Mishiro K, Egashira Y, Ikegaki I, Tsuruma K, Shimazawa M, Yoshimura S, Iwama T, Hara H. A Rho kinase (ROCK) inhibitor, fasudil, prevents matrix metalloproteinase-9-related hemorrhagic transformation in mice treated with tissue plasminogen activator. Neuroscience 2012; 220:302-12. [PMID: 22710066 DOI: 10.1016/j.neuroscience.2012.06.015] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2012] [Revised: 06/01/2012] [Accepted: 06/07/2012] [Indexed: 01/13/2023]
Abstract
Thrombolysis with tissue plasminogen activator (tPA) is the only FDA-approved therapy for acute ischemic stroke. However, hemorrhagic transformation, neurotoxicity, and a short treatment time window comprise major limitations for thrombolytic therapy. The purpose of the present study was to investigate whether fasudil, a Rho kinase (ROCK) inhibitor, would prevent tPA-associated hemorrhagic transformation and extend the reperfusion window in an experimental stroke model in mice. Mice subjected to 6-h middle cerebral artery occlusion were treated with delayed tPA alone, with combined tPA plus fasudil, or with a vehicle. We used histological and neurobehavioral measures to assess the effects of the treatment at 18 h and 7 days after the reperfusion. To investigate the mechanism of fasudil's beneficial effects further, we also performed an in vitro study with tPA and fasudil in human brain microvascular endothelial cells. Combination therapy with tPA plus fasudil prevented the development of hemorrhagic transformation, but did not reduce the infarct volumes. These changes significantly reduced mortality and increased locomotor activity at 7 days after the reperfusion. Furthermore, the administration of both drugs prevented injury to the human brain endothelial cells via the reduction of matrix metalloproteinase-9 (MMP-9) activity. These findings indicate that fasudil prevents the hemorrhagic transformation induced by focal cerebral ischemia in mice treated with tPA, at least in part, by inhibiting the increased activity of MMP-9 in endothelial cells.
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Yoshimura S, Yonekawa T, Isobe N, Masaki K, Satou S, Matsushita T, Kira JI. Distinct Genetic and Infectious Profiles between Multiple Sclerosis and Neuromyelitis Optica in Japanese Patients (P05.122). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p05.122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Akahoshi E, Yoshimura S, Uruno S, Itoh S, Ishihara-Sugano M. Tyrosine hydroxylase assay: a bioassay for aryl hydrocarbon receptor-active compounds based on tyrosine hydroxylase promoter activation. Toxicol Mech Methods 2012; 22:458-60. [PMID: 22394336 DOI: 10.3109/15376516.2012.668574] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Tyrosine hydroxylase (TH) assay is a novel bioassay for screening aryl hydrocarbon receptor (AhR)-active compounds with diverse toxicities. The TH assay employs reporter genes to evaluate TH promoter activity, which is linked to dopamine synthesis and regulated by the AhR-aryl hydrocarbon receptor responsive element-III (AHRE-III)-mediated pathway. The toxic equivalency factors for higher chlorinated dioxin congeners in the TH assay (TH-TEF) exhibit the same tendency as those for the WHO-TEF, indicating that the activity of the TH assay is consistent with that of existing methods. Furthermore, other chemicals, such as lower chlorinated dioxin congeners that were minimally investigated in the past could be detected preferentially by this assay.
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Yoshimura S, Kawasaki M, Yamada K, Enomoto Y, Egashira Y, Hattori A, Nishigaki K, Minatoguchi S, Iwama T. Visualization of internal carotid artery atherosclerotic plaques in symptomatic and asymptomatic patients: a comparison of optical coherence tomography and intravascular ultrasound. AJNR Am J Neuroradiol 2011; 33:308-13. [PMID: 22051806 DOI: 10.3174/ajnr.a2740] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE OCT has been reported as a high-resolution imaging tool for characterizing plaque in the coronary arteries. The present study aimed to evaluate the ability of OCT to visualize carotid artery plaques compared with that of IVUS in asymptomatic and symptomatic patients. MATERIALS AND METHODS OCT was performed for 34 plaques (17 symptomatic, 17 asymptomatic) in 30 patients during CAS under a proximal cerebral protection method. OCT was performed before balloon angioplasty and after stent placement. IVUS was also performed just after OCT. RESULTS No technical or neurologic complications were encountered by using OCT. An inner catheter was used in 12 of 34 procedures (35.3%) for advancing the OCT image wire beyond the site of stenosis. OCT clearly visualized intraluminal thrombus in 15 of 34 plaques (44.1%), whereas IVUS detected a thrombus in 1 plaque (2.9%, P < .001). Neovascularization was demonstrated in 13 of 34 plaques (38.2%) by OCT, but not by IVUS (0%, P < .001). Intraluminal thrombus was more frequently observed in symptomatic plaques (13 of 17, 76.5%) than in asymptomatic plaques (2 of 17, 11.8%; P < .001). Interobserver and intraobserver variability with OCT diagnosis was excellent for thrombus, ulceration, neovascularization, and lipid pool. CONCLUSIONS The present findings suggest that OCT can safely and precisely visualize human carotid plaques during CAS and that intraluminal thrombus and neovascularization are more frequently detected in symptomatic plaques.
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Hirayama M, Kinoshita H, Inoue M, Kawashima K, Yoshimura S. Delayed hemopneumothorax resulting from a ventriculoperitoneal shunt procedure. Minerva Anestesiol 2011; 77:938. [PMID: 21878878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
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Fang L, Isobe N, Yoshimura S, Yonekawa T, Matsushita T, Masaki K, Doi H, Ochi K, Miyamoto K, Kawano Y, Kira J. Interleukin-7 receptor alpha gene polymorphism influences multiple sclerosis risk in Asians. Neurology 2011; 76:2125-7. [DOI: 10.1212/wnl.0b013e31821f466c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Umemura SM, Kadowaki T, Kumaki N, Tang X, Takekoshi S, Yoshimura S, Suzuki Y, Tokuda Y, Osamura RY. Abstract P6-08-02: Comparative Analysis between Primary and Secondary in Breast Tumors by Polymorphysim of Androgen Receptor Gene and Mitochondria D-Loop Somatic Mutation. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-p6-08-02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: It has not been fully understood how we can differentiate a new primary breast cancer from a recurrent tumor, when second tumor arises in ipsilateral breast after the surgery for primary breast cancer. To address this research question, we estimate the usefulness of a method analyzing polymorphism of androgen receptor gene and mitochondrial D-loop somatic mutation.
Materials and methods: 1) Select patients: Among the 558 patients who received the breast conservative surgery in Tokai University Hospital (1991∼2004), 9 ipsilateral breast tumors and 11 contralateral breast tumors were submitted for the analysis. 2) Formalin-fixed paraffin-embedded (FFPE) sections of non-neoplastic lymph node were examined whether polymorphism of AR gene present or not. 3) When polymorphism of AR gene in non-neoplastic lymphoid tissue were demonstrated, ipsilateral and contralateral breast cancers were further examined. 4) When AR gene in breast cancers on same allele in primary and secondary tumors, FFPE sections were further analyzed by mutaion analysis of mitochondrial D-loop region.
Results: 1) Polymorphism of AR was demonstrated in 8/9 (88.9%) and 9/11 (81.8%) non-neoplastic lymph nodes obtained from the patients who had ipsilateral and contralateral breast tumor, respectively. 2) Only 2 of 8 ipsilateral breast cancers demonstrated AR polymorphism different from primary cancer. In contrast, 6 of 9 contralateral breast cancers had different polymorphism for AR from primary breast cancers. 3) Analysis of mitochondrial D-loop mutation showed that 8 seconary ipsilateral cancers had different mutation in 3/8 (37.5%), identical mutation in 3/8 (37.5%), and no mutation in 2/8 (25.0%).
Results of analysis for ipsilateral secondary breast cancers
Conclusion: Half of the ipsilateral in breast secondary tumors were estimated as new primary lesions by molecular estimation. Combination analyses of AR gene polymorphism and mitochondrial D-loop somatic mutation unable us to distinguish between true recurrent or new primary cancers.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr P6-08-02.
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Terasaka K, Yoshimura S, Ogiwara K, Aramaki M, Tanaka MY. Experimental studies on ion acceleration and stream line detachment in a diverging magnetic field. PHYSICS OF PLASMAS 2010; 17:072106. [PMID: 20838424 PMCID: PMC2931599 DOI: 10.1063/1.3457139] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Accepted: 06/04/2010] [Indexed: 05/29/2023]
Abstract
The flow structure of ions in a diverging magnetic field has been experimentally studied in an electron cyclotron resonance plasma. The flow velocity field of ions has been measured with directional Langmuir probes calibrated with the laser induced fluorescence spectroscopy. For low ion-temperature plasmas, it is concluded that the ion acceleration due to the axial electric field is important compared with that of gas dynamic effect. It has also been found that the detachment of ion stream line from the magnetic field line takes place when the parameter |f(ci)L(B)∕V(i)| becomes order unity, where f(ci), L(B), and V(i) are the ion cyclotron frequency, the characteristic scale length of magnetic field inhomogeneity, and the ion flow velocity, respectively. In the detachment region, a radial electric field is generated in the plasma and the ions move straight with the E×B rotation driven by the radial electric field.
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Yoshimura S, Tada H, Katakami N, Nishimura Y, Kurata T, Tanaka M, Kudoh S, Matsui K, Shinkai T, Nakagawa K. 9105 Phase III study of concurrent chemoradiotherapy followed by surgery (S) vs. chemotherapy (C) followed by S for stage IIIA (pN2) non-small cell lung cancer (NSCLC): results of prematurely terminated trial, WJTOG9903. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)71818-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Akahoshi E, Yoshimura S, Uruno S, Ishihara-Sugano M. Effect of dioxins on regulation of tyrosine hydroxylase gene expression by aryl hydrocarbon receptor: a neurotoxicology study. Environ Health 2009; 8:24. [PMID: 19500377 PMCID: PMC2700084 DOI: 10.1186/1476-069x-8-24] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2009] [Accepted: 06/06/2009] [Indexed: 05/24/2023]
Abstract
BACKGROUND Dioxins and related compounds are suspected of causing neurological disruption. Epidemiological studies indicated that exposure to these compounds caused neurodevelopmental disturbances such as learning disability and attention deficit hyperactivity disorder, which are thought to be closely related to dopaminergic dysfunction. Although the molecular mechanism of their actions has not been fully investigated, a major participant in the process is aryl hydrocarbon receptor (AhR). This study focused on the effect of 2, 3, 7, 8-tetrachlorodibenzo-p-dioxin (TCDD) exposure on the regulation of TH, a rate-limiting enzyme of dopamine synthesis, gene expression by AhR. METHODS N2a-Rbeta cells were established by transfecting murine neuroblastoma Neuro2a with the rat AhR cDNA. TH expression induced by TCDD was assessed by RT-PCR and Western blotting. Participation of AhR in TCDD-induced TH gene expression was confirmed by suppressing AhR expression using the siRNA method. Catecholamines including dopamine were measured by high-performance liquid chromatography. A reporter gene assay was used to identify regulatory motifs in the promoter region of TH gene. Binding of AhR with the regulatory motif was confirmed by an electrophoretic mobility shift assay (EMSA). RESULTS Induction of TH by TCDD through AhR activation was detected at mRNA and protein levels. Induced TH protein was functional and its expression increased dopamine synthesis. The reporter gene assay and EMSA indicated that AhR directly regulated TH gene expression. Regulatory sequence called aryl hydrocarbon receptor responsive element III (AHRE-III) was identified upstream of the TH gene from -285 bp to -167 bp. Under TCDD exposure, an AhR complex was bound to AHRE-III as well as the xenobiotic response element (XRE), though AHRE-III was not identical to XRE, the conventional AhR-binding motif. CONCLUSION Our results suggest TCDD directly regulate the dopamine system by TH gene transactivation via an AhR-AHRE-III-mediated pathway. The AhR- mediated pathway could have a particular AhR-mediated genomic control pathway transmitting the effects of TCDD action to target cells in the development of dopaminergic disabilities.
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Yoshimura S, Koga M, Toyoda K, Mukai T, Hyun BH, Naganuma M, Nagatsuka K, Minematsu K. Frontal bone window improves the ability of transcranial color-coded sonography to visualize the anterior cerebral artery of Asian patients with stroke. AJNR Am J Neuroradiol 2009; 30:1268-9. [PMID: 19213827 DOI: 10.3174/ajnr.a1452] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The frontal bone window (FBW) is a promising approach in evaluating the anterior cerebral artery. The goal of the present study was to determine the rates of detection of the basal cerebral arteries by using the FBW alone and a combination of the FBW with the temporal bone window (TBW) in 163 patients. The combined application improved detection rates of A1 (58.6% versus 46.0%, P = .001) and A2 (43.6% versus 6.7%, P < .001) compared with the TBW alone.
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Hyogo T, Taki W, Negoro M, Takahashi A, Edura M, Hyodo A, Kobayashi S, Komiyama M, Kuwayama N, Matsumaru Y, Miyachi S, Murao K, Murayama Y, Nakahara I, Nemoto S, Sakai N, Satoh K, Sonobe M, Sugiu K, Terada T, Yoshimura S, Abe T, Itoh Y, Kiyosue H, Nagashima H, Nakamura M, Matsushima S. Japanese society of neuro-endovascular treatment specialist qualification system. Six years' experience and introduction of an animal model examination. Interv Neuroradiol 2008; 14:235-40. [PMID: 20557719 DOI: 10.1177/159101990801400302] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2008] [Accepted: 07/01/2008] [Indexed: 11/15/2022] Open
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Yoshimura S, Kaku Y, Kokuzawa J, Hayashi K, Sakai N. Strategy for Prevention of Restenosis after PTA. Clinical and Basic Approaches. Interv Neuroradiol 2008; 10 Suppl 1:63-6. [PMID: 20587274 DOI: 10.1177/15910199040100s108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2004] [Accepted: 01/20/2004] [Indexed: 11/15/2022] Open
Abstract
SUMMARY Percutaneous transluminal angioplasty (PTA) has been a useful therapy to treat stenosis of cervical internal carotid artery (ICA) or vertebral artery (VA). Here we show that our clinical results regarding preventive effect of stenting on restenosis after PTA in the ICA and VA origin. We also show our experimental studies with gene transfer techniques aiming reduction of restenosis after balloon-injury in rat carotid artery. It has been reported that drug-eluting stent inhibits restenosis after coronary angioplasty. Further understanding of the mechanism of restenosis and application of these new modalities may lead to better clinical results in angioplasty of the craniocervical arteries.
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Satouchi M, Kotani Y, Katakami N, Shimada T, Urata Y, Yoshimura S, Funada Y, Hata A, Ando M, Negoro S. Randomized phase II study of two different schedules of gemcitabine and oral TS-1 in chemo-naïve patients with advanced non-small cell lung cancer (NSCLC). J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.8103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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