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- 저자 : Takahashi Toshiyuki (검색결과 25 건)
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Cervical Spondylotic Amyotrophy: Case Series and Review of the Literature
Toshiyuki Takahashi,Junya Hanakita,Manabu Minami,Yosuke Tomita,Tomoki Sasagasako,Ryo Kanematsu 대한척추신경외과학회 2019 Neurospine Vol.16 No.3
Objective: Cervical spondylotic amyotrophy (CSA) is a relatively rare entity caused by cervical degenerative spinal diseases and characterized by motor weakness accompanied by remarkable muscle atrophy in the upper extremities without significant sensory deficits or spastic paraparesis in the lower extremities. Postoperative outcomes and predictive prognostic factors vary among previous reports. In the present report, we describe the surgical results in patients who were surgically treated for CSA and present a literature review. Methods: In total, 33 patients with CSA were retrospectively analyzed. Correlations between the surgical outcome and the following factors were statistically analyzed: age, sex, type of impaired muscle, preoperative severity of motor weakness, number of levels of cord or root compression, presence of a T2 high-intensity area in the spinal cord, cervical kyphosis, and methods of surgical procedure. Results: On postoperative neurological evaluation, 25 patients (75.8%) had favorable outcomes and 8 had unfavorable outcomes (proximal type, 72.2%; distal type, 78.6%). Patients with favorable outcomes were significantly younger than those with unfavorable outcomes (p=0.013). Patient’s characteristics except for age and radiological factors were not correlated to surgical outcome. Conclusion: The present study focused on the surgical results in patients who were surgically treated for CSA along with updated information from a literature review. Improvement of motor weakness is expected with acceptable prevalence although higher age can be a negative factor. Surgical outcomes and predictive factors related to a poor prognosis were determined and compared with those of previous articles.
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Toshiyuki Irie,Nobuyuki Takahashi,Sodai Hoshiai 소화기인터벤션의학회 2020 Gastrointestinal Intervention Vol.9 No.1
Super-selective lipiodol balloon-occluded transarterial chemoembolization (SSLB-TACE) increases lipiodol accumulation in the targeted nodule. To understand the mechanism of increased accumulation, it is necessary to understand intra-hepatic collateral system and rheology of lipiodol. Although SSLB-TACE is thought to be a promising technique, randomized prospective controlled trials to compare local control rates with conventional super-selective lipiodol (c-TACE) are still lacking. Another problem for SSLB-TACE is change of TACE candidates by development of radiofrequency ablation (RFA) technology. Patients with limited number of small nodules are good candidates for both SSLB-TACE and c-TACE, but these are also good candidates for RFA. Because higher priority is given to RFA, TACE is usually indicated for patients with 4 or more nodules, with large nodule(s), and/or with proximal Glisson attaching nodule(s). However, these cases are known as TACE-refractory, and the chance to perform SSLB-TACE or c-TACE would be markedly decreased in institutions where RFA is aggressively performed. In the past, paradigm shift from non-selective TACE to super-selective TACE occurred, and the goal of SSLB-TACE and c-TACE is prolonged complete remission of the treated nodules while sacrificing small volume of liver parenchyma. But another TACE technique, aiming treatment of wide region (hemi-lobe or more) and effective tumor volume reduction while minimizing liver parenchymal damage, is mandatory in RFA era. For this purpose, we developed a new balloon-occluded TACE without using lipiodol; alternate infusion of cisplatin solution and sparse gelatin slurry was repeated under balloon-occlusion (RAIB-TACE) until stasis of gelatin slurry in proximal hepatic arteries was seen. However, not only RFA but also recent development of molecular targeted drugs strongly influences on the indication and the aim of TACE. The goal and technique of TACE should be properly selected in each era, in each institution, and for each patient.
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Toshiyuki Irie,Nobuyuki Takahashi,Sodai Hoshiai 소화기인터벤션의학회 2020 International journal of gastrointestinal interven Vol.9 No.1
Super-selective lipiodol balloon-occluded transarterial chemoembolization (SSLB-TACE) increases lipiodol accumulation in the targeted nodule. To understand the mechanism of increased accumulation, it is necessary to understand intra-hepatic collateral system and rheology of lipiodol. Although SSLB-TACE is thought to be a promising technique, randomized prospective controlled trials to compare local control rates with conventional super-selective lipiodol (c-TACE) are still lacking. Another problem for SSLB-TACE is change of TACE candidates by development of radiofrequency ablation (RFA) technology. Patients with limited number of small nodules are good candidates for both SSLB-TACE and c-TACE, but these are also good candidates for RFA. Because higher priority is given to RFA, TACE is usually indicated for patients with 4 or more nodules, with large nodule(s), and/or with proximal Glisson attaching nodule(s). However, these cases are known as TACE-refractory, and the chance to perform SSLB-TACE or c-TACE would be markedly decreased in institutions where RFA is aggressively performed. In the past, paradigm shift from non-selective TACE to super-selective TACE occurred, and the goal of SSLB-TACE and c-TACE is prolonged complete remission of the treated nodules while sacrificing small volume of liver parenchyma. But another TACE technique, aiming treatment of wide region (hemi-lobe or more) and effective tumor volume reduction while minimizing liver parenchymal damage, is mandatory in RFA era. For this purpose, we developed a new balloon-occluded TACE without using lipiodol; alternate infusion of cisplatin solution and sparse gelatin slurry was repeated under balloon-occlusion (RAIB-TACE) until stasis of gelatin slurry in proximal hepatic arteries was seen. However, not only RFA but also recent development of molecular targeted drugs strongly influences on the indication and the aim of TACE. The goal and technique of TACE should be properly selected in each era, in each institution, and for each patient.
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Study of the Oral Discomfort and Oral Habits in Halitosis Patient
Toshiyuki Shimizu,Mie Tashiro,Michael W. Myers,Kohji Takahashi,Shun-Ichi Honda 대한예방치과학회 2012 International Journal of Clinical Preventive Denti Vol.8 No.1
Objective: Purpose of this study was to clarify the relationship between oral discomfort, oral habits and halitosis. Methods: One hundred and forty patients with halitosis (age range, 13 to 65 years; 93 women, 47 men) who had visited Shimizu dental clinic from October 2003 to August 2008 were compared with a control group who did not have complaints about halitosis (n=56). Oral discomfort (such as sensation of dry mouth and discomfort of the tongue), the amount of saliva secretion, and oral habits (such as bruxism) were analyzed statistically between the halitosis and control group. To compare the halitosis patients with the control group, the Wilcoxon signed-ranks test was used for the analysis of the salivary amount, and a chi-Square test was used for the analysis of oral discomfort and oral habits. Results: Frequency of oral discomfort mouth sensation was significantly higher (p<0.0001) in the halitosis patients (63.5%) than in the control group (10.7%). The occurrence of oral habit was significantly higher (p<0.001) in the halitosis patients (63.6%) than in the control group (37.5%). There was a significant difference (p=0.0009) between the halitosis patients (mean: 1.28 ml) and control group (mean: 1.43 ml) in the amount of unstimulated saliva secretion. For the amount of stimulated saliva secretion, there was no significant difference (p=0.2248) between the halitosis patients (mean: 3.40 ml) and control group (mean: 3.76 ml). Conclusion: These results suggest that the presence of oral discomfort and oral habits, such as bruxism, were associated with halitosis.
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Preliminary Analysis of Interconnect Full Open Faults using TEG chips
Toshiyuki Tsutsumi,Yasuyuki Kariya,Masaki Hashizume,Hiroyuki Yotsuyanagi,Koji Yamazaki,Yoshinobu Higami,Hiroshi Takahashi,Yuzo Takamatsu 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
As LSIs are scale-down, there is an increasing need to take measures against open faults. However, no practical model for open faults exists at present. Therefore, we fabricated Test Element Group (TEG) chips that intentionally incorporated full (complete) open defects and electrically measured the output signals relevant to its defective lines in order to create a new model for open fault behavior. This study reveals the effect boundary of adjacent signal lines on the line containing the full open defect for the first time using the TEG chips.
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SUZUKI, Toshiyuki,SAKUMOTO, Ryosuke,HAYASHI, Ken-Go,OGISO, Takatoshi,KUNII, Hiroki,SHIROZU, Takahiro,KIM, Sung-Woo,BAI, Hanako,KAWAHARA, Manabu,KIMURA, Koji,TAKAHASHI, Masashi 家畜繁殖硏究所 2018 Journal of Reproduction and Development Vol.64 No.6
<P>Interferon-tau (IFNT), a type I interferon (IFN), is known as pregnancy recognition signaling molecule secreted from the ruminant conceptus during the preimplantation period. Type I IFNs, such as IFN-alpha and IFN-beta, are known to activate cell-death pathways as well as induce apoptosis. In cows, induction of apoptosis with DNA fragmentation is induced by IFNT in cultured bovine endometrial epithelial cells. However, the status of cell-death pathways in the bovine endometrium during the preimplantation period still remains unclear. In the present study, we investigated the different cell-death pathways, including apoptosis, pyroptosis, and autophagy, in uterine tissue obtained from pregnant cows and <I>in vitro</I> cultured endometrial epithelial cells with IFNT stimulation. The expression of <I>CASP7</I>, <I>8,</I> and <I>FADD</I> (apoptosis-related genes) was significantly higher in pregnant day 18 uterine tissue in comparison to non-pregnant day 18 tissue. The expression of <I>CASP4</I>, <I>11,</I> and <I>NLRP3</I> (pyroptosis-related genes) was significantly higher in the pregnant uterus in comparison to non-pregnant uterus. In contrast, autophagy-related genes were not affected by pregnancy. We also investigated the effect of IFNT on the expression of cell-death pathway-related genes, as well as DNA fragmentation in cultured endometrial epithelial cells. Similar to its effects in pregnant uterine tissue, IFNT affected the increase of apoptosis-related (<I>CASP8</I>) and pyroptosis-related genes (<I>CASP11</I>), but did not affect autophagy-related gene expression. IFNT also increased γH2AX-positive cells, which is a marker of DNA fragmentation. These results suggest that apoptosis- and pyroptosis-related genes are induced by IFNT in the pregnant bovine endometrial epithelial cells.</P>
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[New insights into the pathogenesis of neuromyelitis optica]
Misu, Tatsuro,Takahashi, Toshiyuki,Nishiyama, Shuhei,Takano, Rina,Nakashima, Ichiro,Fujihara, Kazuo,Itoyama, Yasuto 醫學書院 2010 Brain and nerve Vol.62 No.9
<P>Recently, the disease-specific antibody was found in the sera from neuromyelitis optica (NMO) patients, and its target was identified as aquaporin-4 (AQP4), mainly expressed in astroglial foot processes. In our immunohistochemical studies, loss of AQP4 and glial fibrillary acidic protein (GFAP) was evident in about 90% of NMO lesions, especially in perivascular areas of acute inflammatory lesions where immunoglobulins and complements were deposited. In contrast, myelin basic protein (MBP)-stained myelinated fibers were relatively preserved in those lesions, which probably suggested the secondary damage of myelin sheaths following astrocytic damage. Recently, there are developing evidences of the effect of AQP4 antibody in vitro or in vivo. In HEK293 cells transfected with AQP4, AQP4 antibody could bind to the membrane AQP4, and induced the degradation and endocytosis of AQP4 in complement-dependent manner. In vitro experiments by primary cultured astrocytes, AQP4 antibody had cytotoxic effects with complement, and also could impair the astrocytic function such as the maintenance of the blood brain barrier or glutamate homeostasis. In vivo study, the lesions lacking AQP4 and GFAP was appeared by passive-transferred Lewis rats with human purified IgG from NMO patients. Furthermore, in cerebrospinal fluid (CSF) biomarker study, astrocytic damage reflected by marked increase of CSF-GFAP, far severe than demyelination (CSF-MBP), was evident in NMO but not in classical multiple sclerosis (MS). These evidences suggested the pathogenic role of AQP4 antibody with astrocytopathy in NMO. Now it is indispensable to check the AQP4 antibody,and is important to reconsider the role of astrocyte in demyelinating disorders.</P>
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