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Shimada H, Hirano S, Shinotoh H, Aotsuka A, Sato K, Tanaka N, Ota T, Asahina M, Fukushi K, Kuwabara S, Irie T, Ito H, Suhara T. 2.021 DEMENTIA WITH LEWY BODIES CAN BE WELL-DIFFERENTIATED FROM ALZHEIMER'S DISEASE BY MEASUREMENT OF BRAIN ACETYLCHOLIN ESTERASE ACTIVITY BY PET. Parkinsonism Relat Disord 2012. [DOI: 10.1016/s1353-8020(11)70454-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Uchida K, Adachi H, An T, Ota T, Toda M, Hillebrands B, Maekawa S, Saitoh E. Long-range spin Seebeck effect and acoustic spin pumping. NATURE MATERIALS 2011; 10:737-741. [PMID: 21857673 DOI: 10.1038/nmat3099] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Accepted: 07/13/2011] [Indexed: 05/31/2023]
Abstract
Imagine that a metallic wire is attached to a part of a large insulator, which itself exhibits no magnetization. It seems impossible for electrons in the wire to register where the wire is positioned on the insulator. Here we found that, using a Ni₈₁Fe₁₉/Pt bilayer wire on an insulating sapphire plate, electrons in the wire recognize their position on the sapphire. Under a temperature gradient in the sapphire, surprisingly, the voltage generated in the Pt layer is shown to reflect the wire position, although the wire is isolated both electrically and magnetically. This non-local voltage is due to the coupling of spins and phonons: the only possible carrier of information in this system. We demonstrate this coupling by directly injecting sound waves, which realizes the acoustic spin pumping. Our finding provides a persuasive answer to the long-range nature of the spin Seebeck effect, and it opens the door to 'acoustic spintronics' in which sound waves are exploited for constructing spin-based devices.
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Ota T, Ochi A, Enatsu N, Ikeda A, Funada S, Rii J, Suzuki K, Shiga N, Komatsu H. UP-01.207 Thermal Damage of the Soft Coagulation in Pig's Kidney. Urology 2011. [DOI: 10.1016/j.urology.2011.07.757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ohtonari T, Ota S, Nishihara N, Suwa K, Ota T, Sekihara Y, Tanaka A, Koyama T. Arteriovenous fistula in a nerve root of the cauda equina fed by a proximal radiculo-medullary artery: a report of two cases. Interv Neuroradiol 2011; 17:217-23. [PMID: 21696662 DOI: 10.1177/159101991101700213] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2011] [Accepted: 02/13/2011] [Indexed: 10/20/2022] Open
Abstract
While there have been a few reports on cases of intradural spinal arteriovenous fistula located on the filum terminale, no cases of its location in a nerve root of the cauda equina have been reported to date.We describe two such cases and describe the intraoperative findings. A 40-year-old man presented weakness of his left leg. Another 62-year-old man presented paraparesis dominantly in his left leg with urinary hesitation. In both cases, spinal T2-weighted magnetic resonance images showed edema of the spinal cord, indicating a flow void around it. Digital subtraction angiography disclosed an anterior radicular artery branching from the anterior spinal artery on the surface of the conus medullaris and a turnaround vein running in the opposite direction within the cauda equina. In the first patient, while the feeding artery running along a nerve root was detected, the draining vein and the fistula were not identified at first sight. An incision into the respective nerve root exposed their location within it. In the second patient, unlike the first case, the feeding artery and the fistula were buried in a nerve root, while the draining vein was running along the nerve's surface. In both cases, permanent clips were applied to the draining vein closest to the fistula. The recognition of a hidden fistulous point in a nerve root of the cauda equina is essential for successful obliteration of the fistula.
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Hirai M, Niimi K, Miyazaki K, Iwata H, Sugimoto I, Ishibashi H, Ota T, Kominami Y. Development of a device to determine the stiffness of elastic garments and bandages. Phlebology 2011; 26:285-91. [DOI: 10.1258/phleb.2010.010041] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Objective To evaluate the reliability of a newly developed stiffness-determining device, composed of a leg mannequin and air-pack type analyser, for measuring the interface pressure. Method The correlation of stiffness values obtained employing the Hohenstein method and this new method was investigated using 17 different brands of medical elastic compression stocking. Results A significant correlation in stiffness values using the two methods was obtained ( P < 0.01). When this new method was applied to the bandages, the stiffness was significantly correlated with the initial pressure when assessing both short-stretch and long-stretch bandages. On the comparison of stiffness values between elastic stockings and bandages with the same initial pressure, the short-stretch bandages showed a predominantly higher value than long-stretch bandages and stockings ( P < 0.01). Conclusion The reliability of this new method, which can be easily applied to not only elastic stockings but also elastic bandages, was verified. In clinical practice, the compression pressure should be selected in consideration of the prospective stiffness.
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Shindo K, Kawashima K, Ushiba J, Ota N, Ito M, Ota T, Kimura A, Liu M. Effects of neurofeedback training with an electroencephalogram-based Brain–Computer Interface for hand paralysis in patients with chronic stroke: A preliminary case series study. J Rehabil Med 2011; 43:951-7. [DOI: 10.2340/16501977-0859] [Citation(s) in RCA: 173] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Ota T, Takeshima N, Takizawa K. Second-line chemotherapy for carboplatin/paclitaxel-refractory ovarian cancer: are multi-agent chemotherapies of little value truly? EUR J GYNAECOL ONCOL 2011; 32:471-475. [PMID: 22053655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
PURPOSE We examined whether second-line multi-agent chemotherapies are of any value for carboplatin/paclitaxel (TC)-refractory ovarian cancer. METHODS Subjects included 60 patients with ovarian, peritoneal, or tubal carcinoma who received second-line platinum-based combination chemotherapy. Thirty-nine were treated with irinotecan/cisplatin or nedaplatin and 21 with docetaxel/cisplatin shortly after TC failure. Patients were divided between those who were refractory to initial platinum-based chemotherapy (n = 29, Group A) and those who were platinum-sensitive (n = 31, Group B). Efficacy and safety of the combination chemotherapies were compared between the two groups. RESULTS Response to the combination chemotherapy was 10.3% in Group A and 41.9% in Group B. Median time to disease progression was 4.02 months and 7.21 months, respectively (p = 0.006), and median survival time was 7.89 months and 9.23 months, respectively (p = 0.003). There was no difference in response between the two regimens. Grade 3-4 hematologic toxicities were more frequent with the docetaxel regimen. CONCLUSION The choice between agents for second-line chemotherapy for TC-refractory ovarian cancer should be based on whether the cancer was previously platinum-sensitive. With a history of such response, multi-agent chemotherapies are worth considering after TC failure. With no previous response, the expected efficacy of second-line multi-agent chemotherapy is low, suggesting the use of monochemotherapy.
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Hirai M, Niimi K, Iwata H, Sugimoto I, Ishibashi H, Ota T, Nakamura H. Comparison of stiffness and interface pressure during rest and exercise among various arm sleeves. Phlebology 2010; 25:196-200. [PMID: 20656958 DOI: 10.1258/phleb.2009.009064] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVES To compare the interface pressure during rest and exercise among various kinds of arm sleeves. METHODS The interface pressure underneath nine different arm sleeves was measured during 10 maximal opening and closing movements of fingers using a pressure transducer (Air Pack Type Analyser) in 16 healthy volunteers. Furthermore, in order to evaluate the characteristics of each arm sleeve, the extensibility, stiffness and thickness were determined in vitro by several apparatuses. RESULTS There was a significant correlation between stiffness and extensibility. The stiffness was significantly correlated with the pressure difference between muscle contraction and relaxation during exercise. The higher the value of stiffness, the greater the pressure amplitude during exercise. CONCLUSION Short-stretch arm sleeves characterized with a high level stiffness, including thick round- and flat-knitted arm sleeves, are more beneficial for the augmentation of muscle pumping than long-stretch arm sleeves, in the same way as short-stretch bandages or stockings applied to the leg.
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Uchida K, Xiao J, Adachi H, Ohe J, Takahashi S, Ieda J, Ota T, Kajiwara Y, Umezawa H, Kawai H, Bauer GEW, Maekawa S, Saitoh E. Spin Seebeck insulator. NATURE MATERIALS 2010; 9:894-897. [PMID: 20871606 DOI: 10.1038/nmat2856] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2010] [Accepted: 08/12/2010] [Indexed: 05/29/2023]
Abstract
Thermoelectric generation is an essential function in future energy-saving technologies. However, it has so far been an exclusive feature of electric conductors, a situation which limits its application; conduction electrons are often problematic in the thermal design of devices. Here we report electric voltage generation from heat flowing in an insulator. We reveal that, despite the absence of conduction electrons, the magnetic insulator LaY(2)Fe(5)O(12) can convert a heat flow into a spin voltage. Attached Pt films can then transform this spin voltage into an electric voltage as a result of the inverse spin Hall effect. The experimental results require us to introduce a thermally activated interface spin exchange between LaY(2)Fe(5)O(12) and Pt. Our findings extend the range of potential materials for thermoelectric applications and provide a crucial piece of information for understanding the physics of the spin Seebeck effect.
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Ota T, Shimizu J, Adachi R, Yoshioka M, Shimizu A, Sakuno L. P15-16 Change of α wave in writing motion. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60799-7] [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]
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Kamada K, Kunii N, Ota T, Kawai K, Saito N. S10-4 Spatial and temporal dynamics of language-related and face recognition brain functions by electrocorticogram and MEG. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60083-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kamada K, Kawai K, Ota T, Kunii N, Saito N. S39-5 Visualization of the subcortical language fibers on tractography by co-utilizing functional MRI and MEG. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60246-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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163
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Shimizu J, Yoshioka M, Adachi R, Ota T, Shimizu A, Sakuno L. P24-13 Analysis of EEG during the drinking in adult people. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)61010-3] [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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Shimizu A, Yoshioka M, Sakuno L, Ota T, Adachi R, Shimizu J. P15-17 Investigation of brain activity in chopsticks task in dominant and nondominant hands while viewing computer generated movies. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60800-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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165
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Kunii N, Kamada K, Ota T, Kawai K, Saito N. P18-22 The detailed analysis of fMRI in the frontal language area. A comparative study with electrocortical stimulation. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60875-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Nakayama H, Ando K, Harii K, Kajiwara Y, Yoshino T, Uchida K, Ota T, Saitoh E. Detection of inverse spin-Hall effect induced in Pt1−xMx(M= Cu, Au) thin films. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1742-6596/200/6/062014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Hayashi M, Okamura K, Koychev E, Furuya Y, Sugeta A, Ota T, Ebisu S. Effects of Rehydration on Dentin Strengthened by Heating or UV Irradiation. J Dent Res 2009; 89:154-8. [DOI: 10.1177/0022034509354564] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Type I collagen, the major organic component of human dentin, plays an important role in regulating the mechanical strength of dentin. Collagen in dentin can be strengthened by heating. We hypothesized that UV irradiation could produce similar strengthening effects and might maintain the strength of dentin after rehydration. Beam-shaped dentin specimens from the crowns of human third molars were subjected to flexural testing. Flexural strengths were two and three times greater than those in the control group after 5 minutes’ UV irradiation and heating to 140°C, respectively. After 30 days of rehydration, the heated specimens reverted to their original strength, whereas the UV specimens were 69% stronger than the original. Raman spectra of dental collagen were unchanged after heating, whereas several peaks, including a C-C bond in a proline ring, were amplified by UV irradiation. It is concluded that dentin strengthened by UV irradiation retains strength after rehydration because of chemical changes in collagen.
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Patronik N, Ota T, Zenati M, Riviere C. A Miniature Mobile Robot for Navigation and Positioning on the Beating Heart. IEEE T ROBOT 2009; 25:1109-1124. [DOI: 10.1109/tro.2009.2027375] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Itoh S, Nagasaka T, Suzuki K, Satake H, Ota T, Naganawa S. Lymphoplasmacytic sclerosing cholangitis: assessment of clinical, CT, and pathological findings. Clin Radiol 2009; 64:1104-14. [PMID: 19822244 DOI: 10.1016/j.crad.2009.07.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2009] [Revised: 07/16/2009] [Accepted: 07/20/2009] [Indexed: 12/24/2022]
Abstract
AIM To assess the clinical, computed tomography (CT), and pathological findings in patients with lymphoplasmacytic sclerosing cholangitis. MATERIALS AND METHODS Fifteen consecutive patients (four women and 11 men, mean age 71 years) with lymphoplasmacytic sclerosing cholangitis and without the characteristic features of underlying disorders causing benign biliary strictures were retrospectively recruited. Two radiologists evaluated multiphase contrast-enhanced CT images acquired with 0.5 or 1-mm collimation. One pathologist performed all histological examinations, including IgG4 immunostaining. RESULTS The intrahepatic biliary ducts showed dilatation in all 15 patients, but only seven presented with jaundice. Although laboratory data were not available in all patients, serum gammaglobulin and IgG levels were elevated in five of six patients and six of eight patients, respectively. Anti-nuclear antibody was detected in three of six patients. The involved biliary ducts showed the following CT findings: involvement of the hilar biliary duct (14/15), a mean wall thickness of 4.9 mm, a smooth margin (10/15), a narrow but visible lumen (6/15), hyper-attenuation during the late arterial phase (9/15), homogeneous hyper-attenuation during the delayed phase (11/11), and no vascular invasion (14/15). Abnormal findings in the pancreas and urinary tract were detected in eight of 15 patients. In 13 patients with adequate specimens, moderate to severe lymphoplasmacytic infiltration associated with dense fibrosis was observed. Infiltration of IgG4-positive plasma cells was moderate or severe in nine patients and minimal or absent in four patients. CONCLUSION Lymphoplasmacytic sclerosing cholangitis exhibits relatively characteristic clinical and CT findings, although they are not sufficiently specific for differentiation from other biliary diseases.
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Ito M, Owada S, Nishimura T, Ota T. Experimental study of coal liberation: Electrical disintegration versus roll-crusher comminution. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.minpro.2009.02.007] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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171
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Shimada H, Hirano S, Shinotoh H, Aotsuka A, Sato K, Tanaka N, Ota T, Asahina M, Fukushi K, Kuwabara S, Hattori T, Suhara T, Irie T. Mapping of brain acetylcholinesterase alterations in Lewy body disease by PET. Neurology 2009; 73:273-8. [PMID: 19474411 DOI: 10.1212/wnl.0b013e3181ab2b58] [Citation(s) in RCA: 227] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVE To characterize brain cholinergic deficits in Parkinson disease (PD), PD with dementia (PDD), and dementia with Lewy bodies (DLB). METHODS Participants included 18 patients with PD, 21 patients with PDD/DLB, and 26 healthy controls. The PD group consisted of nine patients with early PD, each with a disease duration of less than 3 years, five of whom were de novo PD patients, and nine patients with advanced PD, each with a disease duration greater than or equal to 3 years. The PDD/DLB group consisted of 10 patients with PDD and 11 patients with DLB. All subjects underwent PET scans with N-[11C]-methyl-4-piperidyl acetate to measure brain acetylcholinesterase (AChE) activity. Brain AChE activity levels were estimated voxel-by-voxel in a three-compartment analysis using the arterial input function, and compared among our subject groups through both voxel-based analysis using the statistical parametric mapping software SPM5 and volume-of-interest analysis. RESULTS Among patients with PD, AChE activity was significantly decreased in the cerebral cortex and especially in the medial occipital cortex (% reduction compared with the normal mean = -12%) (false discovery rate-corrected p value <0.01). Patients with PDD/DLB, however, had even lower AChE activity in the cerebral cortex (% reduction = -27%) (p < 0.01). There was no significant difference between early PD and advanced PD groups or between DLB and PDD groups in the amount by which regional AChE activity in the brain was reduced. CONCLUSIONS Brain cholinergic dysfunction occurs in the cerebral cortex, especially in the medial occipital cortex. It begins in early Parkinson disease, and is more widespread and profound in both Parkinson disease with dementia and dementia with Lewy bodies.
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Hirai M, Niimi K, Iwata H, Sugimoto I, Ishibashi H, Ota T, Nakamura H. A comparison of interface pressure and stiffness between elastic stockings and bandages. Phlebology 2009; 24:120-4. [DOI: 10.1258/phleb.2008.008057] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Objectives To compare the interface pressure during posture changes and exercise between elastic stockings and bandages. Methods Using a pressure transducer (air pack-type analyzer), the interface pressures associated with three different elastic stockings and three different elastic bandages were measured during supine resting, standing and exercise in 15 healthy volunteers. Results Short-stretch bandages showed a significantly higher static stiffness index value, which is defined as the pressure difference between lying and standing, than long-stretch bandages and short-stretch stockings ( P < 0.001). Furthermore, short-stretch bandages showed a significantly greater pressure difference between muscle contraction and relaxation in both tip-toe and knee-bending exercises than long-stretch bandages and short-stretch stockings ( P < 0.001). Conclusion Short-stretch bandages can be expected to have more pronounced benefits for augmenting muscle pump than long-stretch bandages and short-stretch stockings.
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Iwase H, Yamamoto Y, Kurebayashi J, Tsuda H, Ota T, Kurosumi M, Miyamoto K, Iwase T. Clinicopathologic and prognostic features of triple-negative breast cancer analyzed in registration data of the Japanese Breast Cancer Society, 11705 cases. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e22122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e22122 Background: Triple-negative (TN) breast cancers which are negative for ER, PgR, and HER2 by immunohistochemistry are associated with a poor prognosis. To clarify the characteristics of TN tumors, the data of the registration committee of the Japanese Breast Cancer Society were analyzed with respect to clinicopathologic factors, response to neoadjuvant chemotherapy (NAC) and prognosis. Methods: Of 14,748 cases that were registered in 2004, 11,705 cases (79.4%) were examined for ER, PgR, and HER2 status, which was based on local institute. In the 2,331 cases of all registered cases, the prognosis and details of the treatment were analyzed with 47.8 months as median follow-up period. In 184 cases (7.9%), NAC was mainly performed using anthracycline and taxane based chemotherapy. Results: Luminal A type with positive for ER and/or PgR and negative for HER2 was most prevalent (53.8%), followed by TN type (15.5%). TN cancers were diagnosed at a slightly advanced stage and more of the cases had lymph node metastases compared to other types. Mucinous or tubular carcinoma was frequently seen in the Luminal A type. Squamous cell, spindle cell carcinoma, or metaplastic carcinoma with bone/cartilage metaplasia was found in only TN type. The HER2 type and TN type had statistically worse outcome compared to Luminal type in DFS and OS (P<.0001 and P<.0001, respectively). Pathological response rate of NAC, including grade 2 and 3, was higher in TN tumor as 51.5 % (22/53) than in Luminal A tumor as 16.7% (12/72). Responders in TN tumors have a better prognosis than non-responder (P=.0016), but this tendency was not recognized in non-TN tumors (P=.15). Conclusions: The ratio of the TN tumors in Japan was 15–6%. Central reviews of immunohistochemistry, such as ER, PgR, HER2, CK5/6, EGFR etc, will be confirmed in this cohort, for TN tumors are similar to basal-like tumors discriminated by gene- profiling. [Table: see text]
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Ota T, Ota K, Jono H, Fujimori H, Ueda M, Shinriki S, Kudo M, Sueyoshi T, Ando Y, Shinohara M. Midkine expression in salivary gland tumours. Int J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.ijom.2009.03.497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Shinriki S, Jono H, Ota K, Ueda M, Kudo M, Ota T, Sueyoshi T, Ibusuki M, Yoshitake Y, Ando Y, Shinohara M. Targeting interleukin-6 receptor inhibits human oral squamous cell carcinoma-related angiogenesis. Int J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.ijom.2009.03.498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ota K, Shinriki S, Ota T, Nakayama H, Hiraki A, Obayashi T, Shinohara M. Mandibular reconstruction using a vascularised osteocutaneous scapular flap. Int J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.ijom.2009.03.659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Uehara S, Muraoka Y, Tanabe S, Ota T, Kimura A. A novel signal processing method using system identification for underwater surface electromyography. ELECTROMYOGRAPHY AND CLINICAL NEUROPHYSIOLOGY 2009; 49:103-108. [PMID: 19400405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
PURPOSE Currently, to record underwater surface electromyography (EMG), electrodes are covered with waterproof tape. For short-term measurement, waterproof tape prevents electrical leakage. However, during long-term measurement, water or sweat can contact the electrodes, changing the measurement conditions and gradually affecting the EMG data. The purpose of present study was to devise a novel method for prolonged underwater EMG recording, which estimate dry-land EMG from underwater EMG recorded by non-waterproofed electrodes using system identification techniques. METHOD One healthy male participated in this study. System identification was used to convert underwater EMG signals to the estimated dry-land signals. Transfer functions were derived using two pairs of surface recording electrodes on the same muscle in parallel. System input was the EMG recorded using non-waterproofed electrodes; the output was the signal recorded underwater using waterproofed electrodes (supposed to be the same as dry-land signals). To examine the validity of the present method, three experiments were conducted. RESULT There was a high positive correlation between the estimated dry-land EMG based on the non-waterproofed electrodes and the EMG obtained using waterproofed electrodes. To test the validity of long-term recording using the novel method, the estimated dry-land EMG signals were measured during 30 minutes of underwater stepping and were stable. CONCLUSION The novel method using non-waterproofed electrodes with system identification techniques eliminated the effect of changes in measurement conditions and appears effective for long-term, underwater surface EMG recording.
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Nakano J, Muto M, Ota T, Matsutani Y, Asagami C. Ganglioside expression of human melanoma and tumor progression. Ganglioside composition of a plaque and a nodule of acral lentiginous melanoma. PIGMENT CELL RESEARCH 2008; Suppl 2:151-3. [PMID: 1409417 DOI: 10.1111/j.1600-0749.1990.tb00366.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Ota T, Aoki-Ota M, Tsunoda K, Nishikawa T, Koyasu S, Amagai M. Autoreactive B-cell elimination by pathogenic IgG specific for the same antigen: implications for peripheral tolerance. Int Immunol 2008; 20:1351-60. [DOI: 10.1093/intimm/dxn095] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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Renard VT, Tkachenko OA, Tkachenko VA, Ota T, Kumada N, Portal JC, Hirayama Y. Boundary-mediated electron-electron interactions in quantum point contacts. PHYSICAL REVIEW LETTERS 2008; 100:186801. [PMID: 18518401 DOI: 10.1103/physrevlett.100.186801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2007] [Indexed: 05/26/2023]
Abstract
An unusual increase of the conductance with temperature is observed in clean quantum point contacts for conductances larger than 2(e2/h). At the same time, a positive magnetoresistance arises at high temperatures. A model accounting for electron-electron interactions mediated by boundaries (scattering on Friedel oscillations) qualitatively describes the observation. It is supported by a numerical simulation at zero magnetic field.
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Patronik NA, Ota T, Zenati MA, Riviere CN. Improved traction for a mobile robot traveling on the heart. CONFERENCE PROCEEDINGS : ... ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL CONFERENCE 2008; 2006:339-42. [PMID: 17946816 DOI: 10.1109/iembs.2006.259532] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
This document describes the effects of several design parameters on the traction generated by the suction pads of a mobile robot that walks on the surface of the heart. HeartLander is a miniature mobile robot that adheres to the epicardial surface of the heart using suction, and can travel to any desired location on the heart to administer therapeutic applications. To maximize the effectiveness of locomotion, the gripper pads must provide sufficient traction to avoid slipping. Our testing setup measured the force applied to the gripper pad adhering to ovine epicardial tissue, and recorded overhead video for tracking of the pad and tissue during an extension. By synchronizing the force and video data, we were able to determine the point at which the pad lost traction and slipped during the extension. Of the pads tested, the pad with no suction grate achieved maximum traction. Increasing the extension speed up to 20 mm/s resulted in a corresponding increase in traction. Increasing the vacuum pressure also improved the traction, but the magnitude of the effect was less than the improvement gained from increasing extension speed.
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Sugita K, Kabashima K, Ota T, Tokura Y. Angiohistiocytoid papules associated with atopic dermatitis. J Eur Acad Dermatol Venereol 2008; 22:403-4. [DOI: 10.1111/j.1468-3083.2007.02357.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ishiguchi T, Kamei S, Matsuda J, Hagihara M, Oshima Y, Katsuda E, Ota T, Suzuki K, Mori Y. Abstract No. 37: Pre-Shaped Aortic Stent-Graft Conformed to Morphology of Aortic Aneurysm: Long-Term Results. J Vasc Interv Radiol 2008. [DOI: 10.1016/j.jvir.2007.12.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Masakado Y, Abe L, Kawakami M, Suzuki K, Ota T, Kimura A, Takahashi N, Liu M. The origin of the premotor potential recorded from the second lumbrical. ELECTROMYOGRAPHY AND CLINICAL NEUROPHYSIOLOGY 2008; 48:9-11. [PMID: 18338530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
PURPOSE When recording with a palm electrode, a premotor potential (PMP) precedes the compound muscle action potential evoked from the second lumbrical muscle following median nerve stimulation. The origin of the premotor potential has remained uncertain. The aim of this study was to determine whether the PMP-2L is a SNAP derived from antidromically activated digital sensory branches of the median nerve. METHODS We recorded three active electrodes were placed over the second lumbrical muscle, the third lumbrical muscle, the fourth lumbrical muscle by multi-channel recordings. RESULTS PMPs are recorded only over the median digital sensory branches after stimulating the median nerve, while they are recorded only over the ulnar branch after stimulating the ulnar nerve. CONCLUSIONS We conclude that the origin of the PMP is a SNAP arising from antidromically activated digital sensory branches.
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Hanada T, Shimizu K, Murakami R, Ota T, Okada S, Inoue S, Hiroe K, Higaki Y, Oda T. [Mitral valve replacement for cabergoline-related severe mitral regurgitation]. KYOBU GEKA. THE JAPANESE JOURNAL OF THORACIC SURGERY 2007; 60:1018-1021. [PMID: 17926907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
An 82-year-old man was referred to our hospital because of progressive heart failure. He had Parkinson's disease and had been treated with cabergoline during the preceding 4 years and 8 months. Echocardiography revealed severe mitral regurgitation through retracted mitral leaflets with incomplete coaptation. Heart failure persisted despite pharmacologic therapy, so the mitral valve was surgically replaced with a biological valve. Histologic analysis showed fibrous thickened mitral chordae with myxoid degeneration. These characteristics of the mitral valve of our patient are similar to the valvular heart disease described with the use of cabergoline. Clinicians must be care of valvular heart disease whenever they treat Parkinson's disease patients with cabergoline.
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Ota T, Takeshima N, Tabata T, Hasumi K, Takizawa K. Treatment of squamous cell carcinoma of the uterine cervix with radiation therapy alone: long-term survival, late complications, and incidence of second cancers. Br J Cancer 2007; 97:1058-62. [PMID: 17895888 PMCID: PMC2360434 DOI: 10.1038/sj.bjc.6604005] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The objective of this retrospective study was to determine the survival rate, incidence of late complications, and incidence of second cancers when radiation therapy alone is used for carcinoma of the uterine cervix. Between 1971 and 1995, 1495 patients with squamous cell carcinoma of the uterine cervix (stages I–IV) were treated with radiation therapy alone in our hospital. Radiation therapy consisted of a combination of high-dose-rate intracavitary brachytherapy and external beam radiotherapy. The cumulative 5-year survival rates for stages Ib, II, and III/IVa carcinoma were 93.5, 77.0, and 60.3%, respectively, and the 10-year survival rates were 90.9, 74.5, and 56.1%, respectively. Local control rates for stages Ib, II, and III/IVa carcinoma were 92.0, 79.4 and 64.2%, respectively. Eighty-two (5.5%) patients suffered grade III/IV or V (fatal) complications. A second cancer developed in 13 (0.87%) patients. Second cancers were observed most frequently in the rectum (five cases), colon (three cases), and uterine body (two cases). Long-term follow-up data revealed that our method of radiation therapy alone for locally advanced carcinoma of the uterine cervix is effective, with low incidences of late complications and second cancers.
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Takashina K, Brun M, Ota T, Maude DK, Fujiwara A, Ono Y, Takahashi Y, Hirayama Y. Anomalous resistance ridges along filling factor nu=4i. PHYSICAL REVIEW LETTERS 2007; 99:036803. [PMID: 17678309 DOI: 10.1103/physrevlett.99.036803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2006] [Indexed: 05/16/2023]
Abstract
We report anomalous structure in the magnetoresistance of SiO(2)/Si(100)/SiO(2) quantum wells. When Landau levels of opposite valleys are driven through coincidence at the Fermi level, the longitudinal resistance displays elevations at filling factors that are integer multiples of 4 (nu=4i) accompanied by suppression on either side of nu=4i. This persists when either the magnetic field or the valley splitting is swept, leading to resistance ridges running along nu=4i. The range of field over which they are observed points to the role of spin degeneracy, which is directly confirmed by their disappearance with the addition of an in-plane magnetic field. The data suggest a new type of many-body effect arising from the combined degeneracy due to the valley and the spin degrees of freedom.
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Matsuda H, Mizumura S, Nagao T, Ota T, Iizuka T, Nemoto K, Takemura N, Arai H, Homma A. Automated discrimination between very early Alzheimer disease and controls using an easy Z-score imaging system for multicenter brain perfusion single-photon emission tomography. AJNR Am J Neuroradiol 2007; 28:731-6. [PMID: 17416830 PMCID: PMC7977345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
BACKGROUND AND PURPOSE In Alzheimer disease (AD), a peculiar regional cerebral blood flow (rCBF) abnormality has been reported in the posterior cingulate gyri and precunei, even at a very early stage. We performed a multicenter brain perfusion single-photon emission tomography (SPECT) study to evaluate the discrimination ability of an easy Z-score imaging system (eZIS) with a common normal data base between patients with very early AD at the stage of mild cognitive impairment and age-matched healthy controls. MATERIALS AND METHODS For a multicenter study, SPECT images of 40 patients with AD and 40 healthy volunteers were acquired from 4 gamma camera systems in 4 different institutions. Systematic differences of SPECT images between gamma cameras were corrected by using conversion maps calculated from the SPECT images of the same brain phantom. Receiver operating characteristic (ROC) analysis was performed to discriminate patients and controls by using a Z-score in the volume of interest (VOI), which had been defined as a region related to AD in subjects other than those in a multicenter study. RESULTS Bilateral posterior cingulate gyri, precunei, and parietal cortices were defined as a VOI showing rCBF reduction in very early AD. A new indicator of rCBF abnormality in the VOI provided 86% accuracy for distinction of AD and healthy controls in the multicenter study. The area under the ROC curve was 0.934. CONCLUSION Because an eZIS can use a common normal data base by converting site-specific SPECT data to the core data, the eZIS was useful for automated diagnosis of very early AD in routine studies in multiple institutions.
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Misu H, Takamura T, Matsuzawa N, Shimizu A, Ota T, Sakurai M, Ando H, Arai K, Yamashita T, Honda M, Yamashita T, Kaneko S. Genes involved in oxidative phosphorylation are coordinately upregulated with fasting hyperglycaemia in livers of patients with type 2 diabetes. Diabetologia 2007; 50:268-77. [PMID: 17187250 DOI: 10.1007/s00125-006-0489-8] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2006] [Accepted: 09/19/2006] [Indexed: 01/06/2023]
Abstract
AIMS/HYPOTHESIS Mitochondrial oxidative phosphorylation (OXPHOS) plays an important role in the pathophysiology of type 2 diabetes. Genes involved in OXPHOS have been reported to be down-regulated in skeletal muscle from patients with type 2 diabetes; however, hepatic regulation is unknown. MATERIALS AND METHODS We analysed expression of genes involved in OXPHOS from the livers of 14 patients with type 2 diabetes and 14 subjects with NGT using serial analysis of gene expression (SAGE) and DNA chip analysis. We evaluated the correlation between expression levels of genes involved in OXPHOS and the clinical parameters of individuals with type 2 diabetes and NGT. RESULTS Both gene analyses showed that genes involved in OXPHOS were significantly upregulated in the type 2 diabetic liver. In the SAGE analysis, tag count comparisons of mitochondrial transcripts showed that ribosomal RNAs (rRNA) were 3.5-fold over-expressed, and mRNAs were 1.2-fold over-expressed in the type 2 diabetes library. DNA chip analysis revealed that expression of genes involved in OXPHOS, which correlated with several nuclear factors, including estrogen-related receptor-alpha or peroxisome proliferator-activated receptor-gamma, was a predictor of fasting plasma glucose levels, independently of age, BMI, insulin resistance and fasting insulin levels (p = 0.04). Surprisingly, genes involved in OXPHOS did not correlate with peroxisome proliferator-activated receptor-gamma coactivator-1alpha or nuclear respiratory factor 1. CONCLUSIONS/INTERPRETATION Our results indicate that upregulation of genes involved in OXPHOS in the liver, which are regulated by different mechanisms from genes in the skeletal muscle, is associated with fasting hyperglycaemia in patients with type 2 diabetes.
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Oiso N, Tsuruta D, Ota T, Kobayashi H, Kawada A. Spotted and rippled reticulate hypermelanosis: a possible variant of Dowling?Degos disease. Br J Dermatol 2007; 156:196-8. [PMID: 17199603 DOI: 10.1111/j.1365-2133.2006.07592.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ohse T, Inagi R, Tanaka T, Ota T, Miyata T, Kojima I, Ingelfinger JR, Ogawa S, Fujita T, Nangaku M. Albumin induces endoplasmic reticulum stress and apoptosis in renal proximal tubular cells. Kidney Int 2006; 70:1447-55. [PMID: 16955111 DOI: 10.1038/sj.ki.5001704] [Citation(s) in RCA: 156] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Chronic proteinuria appears to be a key factor in tubulointerstitial damage. Recent studies have emphasized a pathogenic role of endoplasmic reticulum (ER) stress which is induced by the accumulation of misfolded proteins in ER, extracellular stress, etc. In the present study, we investigated ER stress and ER stress-induced apoptosis in proximal tubular cells (PTCs). Immortalized rat PTCs (IRPTCs) were cultured with bovine serum albumin (BSA). The viability of IRPTCs decreased proportionately with BSA overload in a time-dependent manner. Quantitative real-time polymerase chain reaction analysis revealed that 40 mg/ml BSA increases mRNA of ER stress markers by 7.7- and 4.6-fold (glucose-regulated protein 78 (GRP78) and oxygen-regulated protein 150 (ORP150), respectively) as compared to control. The increased expression of ORP150 and GRP78 in IRPTCs with albumin overload was detected by Western blot and immunofluorescence study. These in vitro observations were supported by in vivo studies, which demonstrated that ER stress proteins were upregulated at PTCs in experimental proteinuric rats. Furthermore, increased ER stress-induced apoptosis and activation of caspase-12 were observed in IRPTCs with albumin overload and kidneys of experimental proteinuric rats. We confirmed that apoptotic cell death was attenuated by co-incubation with caspase-3 inhibitor or calpain inhibitors. These results indicate that the ER stress-induced apoptosis pathway contributed to the insult of tubular cells by proteinuria. In conclusion, renal tubular cells exposed to high protein load suffer from ER stress. ER stress may subsequently lead to tubular damage by activation of caspase-12.
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Hirano S, Shinotoh H, Kobayashi T, Tsuboi Y, Wszolek ZK, Aotsuka A, Tanaka N, Ota T, Fukushi K, Tanada S, Irie T. Brain acetylcholinesterase activity in FTDP-17 studied by PET. Neurology 2006; 66:1276-7. [PMID: 16636254 DOI: 10.1212/01.wnl.0000208515.50924.94] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Ota T, Rontani M, Tarucha S, Nakata Y, Song HZ, Miyazawa T, Usuki T, Takatsu M, Yokoyama N. Few-electron molecular states and their transitions in a single InAs quantum dot molecule. PHYSICAL REVIEW LETTERS 2005; 95:236801. [PMID: 16384326 DOI: 10.1103/physrevlett.95.236801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2005] [Indexed: 05/05/2023]
Abstract
We study electronic configurations in a single pair of vertically coupled self-assembled InAs quantum dots, holding just a few electrons. By comparing the experimental data of nonlinear single-electron transport spectra in a magnetic field with many-body calculations, we identify the spin and orbital configurations to confirm the formation of molecular states by filling both the quantum mechanically coupled symmetric and antisymmetric states. Filling of the antisymmetric states is less favored with increasing magnetic field, and this leads to various magnetic field induced transitions in the molecular states.
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Ota T, Yoshida M, Kimura M, Kinoshita K. Clinicopathologic study of uterine endometrial carcinoma in young women aged 40 years and younger. Int J Gynecol Cancer 2005; 15:657-62. [PMID: 16014120 DOI: 10.1111/j.1525-1438.2005.00129.x] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
To clarify what constitutes the adequate management of uterine endometrial carcinoma in young women, we reviewed clinicopathologically 31 patients aged 40 years and younger between January 1991 and June 2004. As a primary treatment, 12 cases chose hormonal treatment with medroxyprogesterone acetate (MPA; 600 mg/day) due to no findings of myometrial invasion and diagnosis of a grade 1, well-differentiated adenocarcinoma. In remaining 19 cases, surgery was performed. All the 19 patients who received surgery as a primary treatment are alive, with no evidence of a recurrence of the disease. In the 12 patients who received hormonal treatment, 8 patients eventually received a hysterectomy because of recurrence or no response to MPA. Of these eight patients, myometrial invasion was recognized in three patients. One of the eight patients died of the metastasized disease to the liver and brain after hysterectomy. After hormonal treatment, 4 of the 12 patients were exempted from surgery and showed no evidence of recurrence. Two patients had viable children. Progesterone receptor was negative in one case that died. Careful consideration should be given to hormonal treatment with MPA for the conservative management of endometrial carcinoma in young women. Moreover, MPA is not always a consistent management for every patient.
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Ota T, Yoshida M, Kimura M, Kinoshita K. Clinicopathologic study of uterine endometrial carcinoma in young women aged 40 years and younger. Int J Gynecol Cancer 2005. [DOI: 10.1136/ijgc-00009577-200507000-00012] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
To clarify what constitutes the adequate management of uterine endometrial carcinoma in young women, we reviewed clinicopathologically 31 patients aged 40 years and younger between January 1991 and June 2004. As a primary treatment, 12 cases chose hormonal treatment with medroxyprogesterone acetate (MPA; 600 mg/day) due to no findings of myometrial invasion and diagnosis of a grade 1, well-differentiated adenocarcinoma. In remaining 19 cases, surgery was performed. All the 19 patients who received surgery as a primary treatment are alive, with no evidence of a recurrence of the disease. In the 12 patients who received hormonal treatment, 8 patients eventually received a hysterectomy because of recurrence or no response to MPA. Of these eight patients, myometrial invasion was recognized in three patients. One of the eight patients died of the metastasized disease to the liver and brain after hysterectomy. After hormonal treatment, 4 of the 12 patients were exempted from surgery and showed no evidence of recurrence. Two patients had viable children. Progesterone receptor was negative in one case that died. Careful consideration should be given to hormonal treatment with MPA for the conservative management of endometrial carcinoma in young women. Moreover, MPA is not always a consistent management for every patient
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Dote H, Toyooka S, Tsukuda K, Yano M, Ota T, Murakami M, Naito M, Toyota M, Gazdar AF, Shimizu N. Aberrant promoter methylation in human DAB2 interactive protein (hDAB2IP) gene in gastrointestinal tumour. Br J Cancer 2005; 92:1117-25. [PMID: 15770214 PMCID: PMC2361938 DOI: 10.1038/sj.bjc.6602458] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The human DOC-2/DAB2 interactive protein (hDAB2IP) gene is a novel member of the Ras GTPase-activating family and has been demonstrated to be a tumour-suppressor gene inactivated by methylation in several cancers. In this study, we analysed the methylation and expression status of hDAB2IP in gastrointestinal tumours. The promoter region of hDAB2IP was divided into two regions (m2a and m2b) based on our previous report, and the methylation status was determined by bisulphite DNA sequencing in gastric cancer cell lines. The gene expression was semiquantified by real-time RT–PCR, and the results indicated that the m2b promoter region might be an authentic methylation-mediated key regulator of the gene expression. Based on the sequence data, we developed a methylation-specific PCR (MSP) for the m2a and m2b regions and applied it to the samples. Methylation-specific PCR revealed aberrant methylation in the m2a region in eight of 12 gastric cancer cell lines (67%), 16 of 35 gastric cancer tissues (46%) and 29 of 60 colorectal cancer tissues (48%), and in the m2b region in eight of 12 cell lines (67%), 15 of 35 gastric cancer tissues (43%) and 28 of 60 colorectal cancer tissues (47%). On the other hand, seven (12%) and 11 (19%) of 59 gastrointestinal nonmalignant mucosal specimens showed methylation in the m2a and m2b regions, respectively, suggesting that hDAB2IP methylation might play a causative role in carcinogenesis. The 5-aza-2′-deoxycytidine treatment restored the gene expression in the m2b-methylated cell lines, confirming that the methylation caused gene downregulation. We also examined the relationship between hDAB2IP methylation and the clinicopathological features in patients with primary tumours, and determined that methylation in the m2b region was associated with location of the tumour in the stomach. In summary, our results demonstrated that hDAB2IP methylation is frequently present in gastrointestinal tumours and that the resulting gene silencing plays an important role in gastrointestinal carcinogenesis.
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Hayashi H, Shimizu K, Tani T, Takamura H, Takeshita M, Funaki K, Kitagawa H, Kayahara M, Ota T, Miwa K. Multiple organ failure caused by end-stage liver disease successfully treated with living donor liver transplantation using perioperative percutaneous cardiopulmonary support: a case report. Transplant Proc 2005; 37:1101-3. [PMID: 15848635 DOI: 10.1016/j.transproceed.2005.01.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
A 54-year-old female diagnosed with primary biliary cirrhosis (PBC) 10 years earlier was referred for a living donor liver transplant (LDLT). During her workup, she developed pulmonary edema and respiratory failure due to aspiration pneumonia, which required artificial ventilation. The PaO2/FiO2 (P/F) ratio at that time was 60. Although continuous hemodiafiltration (CHDF) and plasma exchange (PE) were initiated, improvement in the P/F ratio was limited to 133. As transplantation was the only approach to save this patient, we performed LDLT using a right lobe graft aided by percutaneous cardiopulmonary support (PCPS). The graft weight was 650 g and the graft weight/recipient weight ratio was 1.6%. During LDLT, the patient's cardiopulmonary function was stable with PCPS, and the surgical procedure was completed without complications. Following the surgery, she continued to have high-end inspiratory pressure and progressed to the chronic phase of adult respiratory distress syndrome (ARDS). We treated her with low-dose steroid therapy and she improved gradually. The patient was weaned off mechanical ventilation and was discharged approximately 25 weeks after LDLT. In the condition of cardiac or respiratory failure, cadaveric liver transplantation using plasmapheresis is contraindicated because of the associated high mortality rate. Our case suggests that if infections are controlled, a patient with multiple organ failure (MOF) due to end-stage liver disease might be successfully treated with LDLT aided by plasmapheresis and PCPS.
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Mizobe T, Tsukada J, Higashi T, Iwashige A, Ota T, Kawano I, Kubota A, Matsuura A, Morimoto H, Ogawa R, Toda Y, Tanaka Y. [Angioimmunoblastic T-cell lymphoma accompanied by pure red cell aplasia]. [RINSHO KETSUEKI] THE JAPANESE JOURNAL OF CLINICAL HEMATOLOGY 2005; 46:211-6. [PMID: 16447717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
A 71-year-old woman was admitted in December 2002 because of lymphadenopathy, hepatosplenomegaly and pleural effusion. She had severe anemia with hemoglobin 5.9 g/dl and a reticulocyte count of 1% per hundred. Direct/indirect Coombs tests and anti-double stranded DNA antibody were positive, her serum CH50 level was reduced and an increase in serum LDH isoenzyme 3 was observed. Bone marrow aspiration showed an almost total absence of erythroblasts and no pathological cell proliferation. The diagnosis of angioimmunoblastic T-cell lymphoma (AILT) was made based on the lymph node histological findings. Proliferation of arborizing small vessels with hyperplastic endothelium and infiltration of atypical T-lymphocytes were observed. After combination chemotherapy (THP-COP), remission was achieved in both the pure red cell aplasia (PRCA) and AILT. Remission was also accompanied by normalization of the Coombs tests, suggesting that autoimmune mechanisms in AILT may contribute to the development of PRCA.
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Tsuji T, Suzuki K, Masakado Y, Ota T, Kimura A, Liu M, Chino N. Long-lasting effects of paired associative stimulation in hemiparetic stroke patients. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.ics.2004.11.096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Aoki-Ota M, Tsunoda K, Ota T, Iwasaki T, Koyasu S, Amagai M, Nishikawa T. A mouse model of pemphigus vulgaris by adoptive transfer of naive splenocytes from desmoglein 3 knockout mice. Br J Dermatol 2004; 151:346-54. [PMID: 15327541 DOI: 10.1111/j.1365-2133.2004.06056.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Pemphigus vulgaris (PV) is an autoimmune blistering disease caused by antidesmoglein3 (anti-Dsg3) IgG autoantibodies. Recently, we developed a PV mouse model by adoptive transfer of splenocytes from recombinant Dsg3-immunized Dsg3(-/-) mice to Rag2(-/-) immunodeficient mice that expressed Dsg3. OBJECTIVES We determined whether the adoptive transfer of naive splenocytes from nonimmunized Dsg3(-/-) mice induces the anti-Dsg3 IgG production and the PV phenoytpe in recipient mice. METHODS We adoptively transferred naive Dsg3(-/-) splenocytes into Rag2(-/-) mice and compared their PV phenoytpe with those mice receiving immunized Dsg3(-/-) splenocytes. The numbers of splenocytes and their subpopulations required for anti-Dsg3 IgG production were examined. RESULTS Mice that received naive Dsg3(-/-) splenocytes produced anti-Dsg3 IgG, which bound to keratinocyte cell surfaces in vivo, and developed the PV phenotype, including oral erosions with suprabasilar acantholysis. Antibody production and the appearance of the PV phenotype were delayed by approximately 2 weeks in mice that received naive splenocytes compared with mice that received immunized splenocytes. However, once the PV phenotypes developed, there were no apparent differences in disease severity between the two models. Interestingly, the anti-Dsg3 IgG titres were significantly lower in mice that received naive splenocytes than in mice that received immunized splenocytes, suggesting that the former antibodies were more potent than the latter. The frequency of anti-Dsg3 IgG production depended on the number of transferred naive splenocytes. Both CD4+ T cells and B220+ B cells from naive Dsg3(-/-) mice were essential for the production of anti-Dsg3 IgG antibodies. CONCLUSIONS Dsg3-specific naive lymphocytes in Dsg3(-/-) mice can be primed and activated by the endogenous Dsg3 in recipient mice to produce pathogenic anti-Dsg3 IgG without active immunization. This approach using naive lymphocytes provides a unique model to dissect immunological mechanisms of tolerance against peripheral autoimmune targets.
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