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Morita M, Katagiri Y, Tsuchiya T, Fukuda Y, Uchiide I, Nakakuma M. The utility of the shock index to predict intra-abdominal bleeding of ectopic pregnancy. Fertil Steril 2011. [DOI: 10.1016/j.fertnstert.2011.07.577] [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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Miura T, Katakura Y, Yamamoto K, Uehara N, Tsuchiya T, Kim EH, Shirahata S. Neural stem cells lose telomerase activity upon differentiating into astrocytes. Cytotechnology 2011; 36:137-44. [PMID: 19003324 DOI: 10.1023/a:1014016315003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Serum-free mouse embryo (SFME) cells were established by D. Barnes et al., and are known to be a neural stem cell line, which differentiate into astrocytes upon treatment with TGF-beta. Therefore, SFME cells is thought to be a model well suited to analyze the differentiation mechanism of neural stem cells. Until now, we have investigated the regulation mechanisms of telomerase activity and telomere length in human cancer and normal cells. Telomerase is the enzyme responsible for the synthesis and maintenance of telomere repeats located at chromosomal ends and is normally expressed in embryonic and germline cells, but not in most normal cells. Here, using SFME cells, we attempted to analyze the regulation mechanism of telomerase activity in neural stem cells and to detect a change upon differentiation into astrocytes. When SFME cells were cultured in the presence of TGF-beta, cells showed anelongated morphology and decreased its growth to 50% of control culture. Cells also expressed the glial fibrillary acidic protein (GFAP), a marker for astrocytes,indicating that TGF-beta induced differentiation in SFME cells from neural stem cells into astrocytes. At the same time,TGF-beta also inhibited telomerase activity and repressed the expression of the mouse telomerase reverse transcriptase(mTERT), demonstrating that SFME cells was vested with a finite replicative life span upon treatment with TGF-beta. To understand the mechanisms regulating mTERT levels during differentiation into astrocytes, we have estimated the expression level of c-myc, which is known to be a key molecule in activating the TERT promoter. As a result, TGF-beta-treated SFME cells were shown to repress the expression of c-myc. Furthermore, promoter analysis, using the 5'-region of the mTERT gene, which possess two E-box elements bound to c-Myc/Max, demonstrated that mTERT promoter activity greatly decreased in TGF-beta-treated SFME cells as compared to non-treated SFME cells. These suggest that c-myc might play a critical role in the expression of mTERT, and that down-regulation of c-myc dependent upon the astrocytic differentiation in SFME cells might cause the repression of mTERT in TGF-beta-treated SFME cells.
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Itoi T, Ishii K, Sofuni A, Itokawa F, Kurihara T, Tsuchiya T, Tsuji S, Ikeuchi N, Moriyasu F. Ultraslim endoscope-assisted therapeutic ERCP for inaccessible papilla by a double-balloon enteroscope in patients with Roux-en-Y anastomosis. Endoscopy 2011; 43 Suppl 2 UCTN:E36-7. [PMID: 21287441 DOI: 10.1055/s-0029-1215327] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Xu F, Wang S, Racho R, Diaz-Garcia C, Akhi SN, Brannstrom M, Reinblatt S, Desforges N, Wiser A, Salamah K, Shalom-Paz E, Shrim A, Holzer H, Tulandi T, Azizollahi S, Azizollahi G, Nematollahi SN, Babaei H, Rastegari A, Maghsudi S, Hamerlynck TWO, Schoot BC, Emanuel MH, Akhi SN, Diaz-Garcia C, Brannstrom M, Morita M, Katagiri Y, Tsuchiya T, Fukuda Y, Uchiide I, Nakakuma M, Moos B, Chandrasena A, Chan YY, Jayaprakasan K, Raine-Fenning N, Bosteels J, Weyers S, D'Hooghe T, Mol BWJ. POSTER VIEWING SESSION - REPRODUCTIVE SURGERY. Hum Reprod 2011. [DOI: 10.1093/humrep/26.s1.92] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ando T, Okada S, Niijima Y, Hashimoto K, Shimizu H, Tsuchiya T, Yamada M, Ohshima K, Mori M, Ono K. Impaired glucose tolerance, but not impaired fasting glucose, is a risk factor for early-stage atherosclerosis. Diabet Med 2010; 27:1430-5. [PMID: 21059096 DOI: 10.1111/j.1464-5491.2010.03144.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIMS The study aimed to investigate early-stage atherosclerosis in patients with impaired fasting glucose compared with patients with impaired glucose tolerance. METHODS Body mass index, systolic blood pressure, fasting plasma glucose, lipid variables, ankle-brachial pressure index and brachial-ankle pulse wave velocity were measured in 2842 subjects from Takasaki city located approximately 100 km north of Tokyo in Japan. The subjects were divided into the following five groups based on a 75-g oral glucose tolerance test: (i) normal fasting plasma glucose/normal glucose tolerance group, (ii) impaired fasting glucose group, (iii) impaired glucose tolerance group, (iv) combined glucose intolerance group and (v) diabetic glucose intolerance group. RESULTS In comparison with fasting plasma glucose levels (r = 0.269, P < 0.0001), 2-h post-challenge glucose levels were more closely correlated with pulse wave velocity values (r = 0.300, P < 0.0001). The groups with impaired glucose tolerance, combined glucose intolerance and diabetic glucose intolerance had significantly higher pulse wave velocity values compared with the groups with normal glucose tolerance and impaired fasting glucose. Multiple regression analyses showed an independent association of age, systolic blood pressures, total cholesterol, fasting and 2h plasma glucose with pulsewave velocityvalues. Furthermore, pulse wave velocity was not significantly correlated with fasting plasma glucose, but was correlated with increased 2h plasma glucose. CONCLUSIONS Groups with impaired glucose tolerance and combined glucose intolerance had significantly higher brachio-ankle pulse wave velocity values compared with the group with normal glucose tolerance. Although the group with impaired fasting glucose showed a marginal increase in pulse wave velocity values compared with the group with normal glucose tolerance, the difference was not significant. Thus impaired glucose tolerance, but not impaired fasting glucose, is a risk factor for early-stage atherosclerosis.
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Yamaguchi T, Tsuchiya T, Miyamoto K, Nagamoto Y, Takahashi N. Characterization of non-pulmonary vein foci with an EnSite array in patients with paroxysmal atrial fibrillation. Europace 2010; 12:1698-706. [DOI: 10.1093/europace/euq326] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Watanabe M, Masaki H, Mori T, Tsuchiya T, Konuma H, Hara-Kudo Y, Takatori K. Inactivation effects of UV irradiation and ozone treatment on the yeast and the mold in mineral water. J Food Prot 2010; 73:1537-42. [PMID: 20819369 DOI: 10.4315/0362-028x-73.8.1537] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In recent years, bottled mineral water has undergone inactivation by methods other than the traditional heat treatment during the production process; there are fewer reports of the effectiveness of these inactivation methods on yeasts and molds in mineral water than on bacteria and protozoan oocysts. In this study, we evaluated the effects of UV irradiation and ozone treatment compared with heat treatment at 85 degrees C on yeast cells and mold spores inoculated into mineral water. A 5-log reduction occurred at a UV radiation dose of 31,433 microJ/cm2 for Saccharomyces cerevisiae and at 588,285 microJ/cm2 for Penicillium pinophilum. The treatment time for 5-log reduction estimated for UV irradiation was about 0.6 min for S. cerevisiae and about 10.7 min for P. pinophilum; at an ozone concentration of 0.1 ppm, it was 1.75 min for S. cerevisiae and 2.70 min for P. pinophilum, and at a concentration of 0.6 ppm, it was 0.32 min for S. cerevisiae and 0.57 min for P. pinophilum. Comparison of the inactivation effects among the three methods showed that UV irradiation and ozone treatment were less effective than heat treatment at 85 degrees C. Thus, when UV irradiation and ozone treatment are used for inactivation of mineral water, it seems that they need to be combined with heat treatment to achieve a definite effect. Yeast cells are more sensitive to all three inactivation methods than are mold spores, and the sensitivity of yeast cells and mold spores to these inactivation methods may vary among genera.
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Ishii Y, Tsuchiya T. Prolonged relaxation after stimulation of the clasping muscle of male frog, Rana japonica, during the breeding season. Zoolog Sci 2010; 27:595-601. [PMID: 20608849 DOI: 10.2108/zsj.27.595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We investigated the mechanical properties of the flexor carpi radialis muscle (FCR), a forelimb muscle used mainly for amplexus in the breeding season (February to March), of the male Japanese brown frog, Rana japonica. In the present experiment, the changes in force and stiffness of the FCR before, during, and after contraction were measured at 4 degrees C. The total time from the end of stimulation to the end of relaxation was about 30 min. The time course of this prolonged relaxation was fitted by two exponential decay processes. Stiffness decreased during prolonged relaxation, but stayed higher than force, when normalized to peak values. These mechanical properties of the FCR were different from those of the glutaeus magnus muscle (GM) in the hindlimb, used for jumping. When a quick release was applied to the FCR during relaxation, the force recovered gradually after a sudden decrease. The time course of this force recovery was fitted by a single exponential term, and the rate constant decreased as the prolonged relaxation proceeded. The possible involvement of active process(es) in the prolonged relaxation is discussed.
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Miyamoto K, Tsuchiya T, Narita S, Yamaguchi T, Nagamoto Y, Ando SI, Hayashida K, Tanioka Y, Takahashi N. Bipolar electrogram amplitudes in the left atrium are related to local conduction velocity in patients with atrial fibrillation. Europace 2009; 11:1597-605. [DOI: 10.1093/europace/eup352] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Fath El Bab A, Sugano K, Tsuchiya T, Tabata O, Eltaib M, Sallam M. Micro machined tactile sensor for soft tissue compliance detection. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.proche.2009.07.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ezure T, Hosoi J, Amano S, Tsuchiya T. Sagging of the cheek is related to skin elasticity, fat mass and mimetic muscle function. Skin Res Technol 2009; 15:299-305. [DOI: 10.1111/j.1600-0846.2009.00364.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Oki M, Isozaki M, Nakamura N, Kikuchi A, Tsuchiya T, Arbogast P, Ogawa Y, Ando K. A multivariate analysis for the survival of nodal peripheral T-cell lymphoma (PTCL). J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e19521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e19521 Background: Nodal peripheral T-cell lymphoma (PTCL) is uncommon lymphoma with various subtypes and poor prognosis. There is no definitive therapeutic improvement by conventional chemotherapy (CT) for decades. However, the superiority of high-dose chemotherapy followed by autologous stem cell transplantation (ASCT) has remained inconclusive. The infrequency of PTCL is an obstacle to perform a large prospective study. We conducted a retrospective study of fifty six patients with three major nodal PTCL, histologically classified as PTCL-not specified (NOS, n=29), angioimmunoblastic T-cell lymphoma (AITL, n=19), and ALK-negative anaplastic large cell lymphoma (ALCL, n=8) who underwent ASCT (n=14) or not (n=42) after CT in Tokai University Hospital, Ebina General Hospital, and Hadano Red Cross Hospital, Kanagawa, Japan between 1997 and 2008. We determined whether international prognostic index (IPI), serum soluble IL-2 receptor level (sIL-2R) and ASCT were correlated with the survival. Methods: Retrospective, multicenter cohort study by time-dependent or non-time-dependent multivariate survival analysis with Cox proportional hazard regression. Results: Median age was 61 (18–81). The percentage of IPI more than 3 was 50. Median sIL-2R was 4120 ng/ml. (311–96,800). In non-time-dependent analysis, both ASCT and sIL-R were significant prognostic factors for overall survival (OS). Hazard ratio (HR) of ASCT, IPI, and sIL-2R were 0.24 (95%CI: 0.08–0.76, p=0.02), 0.77 (95%CI: 0.34–1.77, p=0.54), and 1.45 (95%CI: 1.129–1.857, p=0.035), respectively. But in time-dependent manner, the significant effect of ASCT was offset for OS. HR of ASCT was 0.82 (95%CI: 0.25–2.71, p=0.75). Only sIL-2R was still statistically significant, which HR was 1.31 (95%CI: 1.04–1.66, p=0.03). On the other hand, ASCT was only important effect on progression-free survival (PFS) by non-time-dependent analysis, which HR was 0.20 (95%CI: 0.07–0.55, p=0.02). After time-dependent analysis, no variates influenced PFS. Conclusions: The OS advantage of high-dose chemotherapy followed by ASCT is offset by time-dependent Cox proportional hazard analysis. The level of sIL-2R has impact on OS. Prospective multicenter randomized trial will be needed to show or not to show an advantage for ASCT. No significant financial relationships to disclose.
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Tsuchiya T. Barley Genetics Newsletter. Hereditas 2009. [DOI: 10.1111/j.1601-5223.1973.tb01079.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Rahman MS, Tsuchiya T. In vitro culture of human chondrocytes (1): A novel enhancement action of ferrous sulfate on the differentiation of human chondrocytes. Cytotechnology 2008; 37:163-9. [PMID: 19002919 DOI: 10.1023/a:1020506821201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Chondrogenic differentiation of mesenchymal cells is generally thought to be initiated by the inductive action of specific growth factors and depends on intimate cell-cell interactions. The aim of our investigation was to characterize the influences of basic fibroblast growth factor (bFGF) and ferroussulfate (FeSO(4)) on proliferation and differentiation of human articular chondrocytes (HAC). This is the first report of the effects of FeSO(4) on chondrogenesis of HAC. Multiplied chondrocytes of hip and shoulder joints were cultured in chondrocyte growth medium supplemented with bFGF, FeSO(4), or both bFGF + FeSO(4) for4weeks. A 20 mul aliquot of a cell suspension containing2 x 10(7) cells ml(-1) was delivered onto each well of 24-well tissue culture plates. Cells cultured with the growth medium only was used as a control. Alamar blue and alcian blue staining were done to determine the chondrocyte proliferation and differentiation, respectively, after 4 weeks. The samples exposed to bFGF, FeSO(4), and combination of both indicated sufficient cell proliferation similar to the control level. Differentiations of the HAC exposed to bFGF, FeSO(4),and bFGF + FeSO(4) were 1.2-, 2.0-, and 2.2-fold of the control, respectively. Therefore, chondrocyte differentiation was significantly enhanced by the addition of FeSO(4) andbFGF + FeSO(4). The combined effects of bFGF and FeSO(4) were additive, rather than synergistic. These results suggest that treatment with ferrous sulfate alone or in combination with basic fibroblast growth factor etc, is a powerful tool to promote the differentiation of HAC for the clinical application.
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Kenjo A, Saito T, Tsuchiya T, Sato Y, Kimura T, Ogata T, Ohto H, Yasuda H, Kawabata K, Gotoh M. PLATELET-TRANSFUSION REFRACTORINESS FOLLOWING LIVING RELATED LIVER TRANSPLANTATION. Transplantation 2008. [DOI: 10.1097/01.tp.0000330716.08578.d5] [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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Tagawa T, Nakao K, Nakamura A, Yamasaki N, Tsuchiya T, Nagayasu T. [How to treat arrhythmias in thoracic surgery]. KYOBU GEKA. THE JAPANESE JOURNAL OF THORACIC SURGERY 2008; 61:715-720. [PMID: 20715416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
After major noncardiac thoracic operations, various types of arrhythmia would occur. Particularly atrial fibrillation (Af), have remained one of the most frequent complications. In the literatures, risk factors for post operative Af have identified age, male, extent of pulmonary resection and mediastinal lymph node dissection. When we would meet the patients complicated with arrhythmia, the etiology of it must be identified and treated before operations. If accidental arrhythmia occurred during or after operations, the etiology of arrhythmia as hypoxia, hypercapnea, electrolyte disorder, overhydration and cardiac ischemia would be checked and cleared at first. Then appropriate drugs should be considered to use due to the type of arrhythmia. In supraventricular tachyarrhythmia, especially Af, landiolol and verapamil would be effective for the rate control and disopyramide and procaineamide for the defibrillation. Lidocaine and propranolol would be an appropriate choice for ventricular tachyarrhythmia during operations. For ventricular tachyarrhythmia related with acute myocardial infarction, lidocaine and mexiletine would be proper. In bradyarrhythmias a temporary pacing should be the first choice for urgent therapy. A prompt assessment and an adequate therapy must be mandatory for the arrhythmias after major noncardiac thoracic operations.
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Hosoi J, Inoue K, Ashida Y, Tsuchiya T. Synergistic regulation of neuropeptide levels by internal and external stimuli. Exp Dermatol 2008. [DOI: 10.1111/j.0906-6705.2004.0212au.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]
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Kaneita Y, Sakurai H, Tsuchiya T, Ohida T. Changes in smoking prevalence and attitudes to smoking among Japanese physicians between 2000 and 2004. Public Health 2008; 122:882-90. [PMID: 18561965 DOI: 10.1016/j.puhe.2007.12.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2006] [Revised: 08/13/2007] [Accepted: 12/17/2007] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To estimate smoking prevalence among Japanese physicians in 2004, clarify their attitudes towards smoking, and compare and examine the results of the 2004 survey with those of the 2000 survey. STUDY DESIGN Cross-sectional study. METHODS Among members of the Japan Medical Association, 3000 male and 1500 female physicians were selected at random, and mailed self-administered, anonymous questionnaires. The survey was conducted between February and July 2004. Data from 3633 respondents were analysed. RESULTS Smoking prevalence among males in 2004 was 21.5% [95% confidence interval (CI) 19.9-23.1%], which was significantly lower than that found in 2000 (27.1%; 95%CI 25.4-28.8%). Smoking prevalence among females in 2004 was 5.4% (95%CI 4.1-6.7%), which was not significantly different from that in 2000 (6.8%; 95%CI 5.4-8.2%). For nicotine dependency, no significant differences were observed for male or female physicians between 2004 and 2000. The percentages of respondents who agreed that 'physicians should not smoke' and 'patients should not smoke' increased in both males and females. The proportion of physicians that actively encouraged smoking cessation also increased in 2004. CONCLUSIONS There were some favourable changes in anti-smoking behaviour among Japanese physicians between 2000 and 2004. However, several problems still need to be resolved, and further anti-smoking measures are required.
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Nagai Y, Asai H, Tsuchiya T. The average number of distinct sites visited by a one-dimensional random walker and its application to isotope exchange in polypeptides. Biophys Chem 2008; 13:213-22. [PMID: 17000168 DOI: 10.1016/0301-4622(81)80003-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/1980] [Revised: 07/10/1980] [Indexed: 10/17/2022]
Abstract
The average number of distinct sites visited by a random walker moving with arbitrary transition probability on a one-dimensional lattice is calculated. Asymptotic forms of this quantity for both asymmetric and symmetric random walks are determined, and an exact solution for the latter case is also given for any number of steps. The average number of sites visited is then analyzed for intermediate numbers of steps by introducing an exponent. This approach is applied to explain the results of isotope exchange experiments in polypeptides, and applications of asymmetric random walks to other biological problems are briefly discussed.
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Kumada H, Haishima Y, Watanabe K, Hasegawa C, Tsuchiya T, Tanamoto K, Umemoto T. Biological properties of the native and synthetic lipid A of Porphyromonas gingivalis lipopolysaccharide. ACTA ACUST UNITED AC 2008; 23:60-9. [PMID: 18173800 DOI: 10.1111/j.1399-302x.2007.00392.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
INTRODUCTION AND METHODS A pentaacyl and diphosphoryl lipid A molecule found in the lipid A isolated from Porphyromonas gingivalis lipopolysaccharide (LPS) was chemically synthesized, and its characteristics were evaluated to reconfirm its interesting bioactivities including low endotoxicity and activity against LPS-unresponsive C3H/HeJ mouse cells. RESULTS The synthesized P. gingivalis lipid A (synthetic Pg-LA) exhibited strong activities almost equivalent to those of Escherichia coli-type synthetic lipid A (compound 506) in all assays on LPS-responsive mice, and cells. LPS and native lipid A of P. gingivalis displayed overall endotoxic activities, but its potency was reduced in comparison to the synthetic analogs. In the assays using C3H/HeJ mouse cells, the LPS and native lipid A significantly stimulated splenocytes to cause mitosis, and peritoneal macrophages to induce tumor necrosis factor-alpha and interleukin-6 production. However, synthetic Pg-LA and compound 506 showed no activity on the LPS-unresponsive cells. Inhibition assays using some inhibitors including anti-human Toll-like receptor 2 (TLR2) and TLR4/MD-2 complex monoclonal antibodies showed that the biological activity of synthetic Pg-LA was mediated only through the TLR4 signaling pathway, which might act as a receptor for LPS, whereas TLR2, possibly together with CD14, was associated with the signaling cascade for LPS and native lipid A of P. gingivalis, in addition to the TLR4 pathway. CONCLUSION These results suggested that the moderated and reduced biological activity of P. gingivalis LPS and native lipid A, including their activity on C3H/HeJ mouse cells via the TLR2-mediated pathway, may be mediated by bioactive contaminants or low acylated molecules present in the native preparations having multiple lipid A moieties.
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Niino D, Tsukasaki K, Torii K, Imanishi D, Tsuchiya T, Onimaru Y, Tsushima H, Yoshida S, Yamada Y, Kamihira S, Tomonaga M. Human herpes virus 8-negative primary effusion lymphoma with BCL6 rearrangement in a patient with idiopathic CD4 positive T-lymphocytopenia. Haematologica 2008; 93:e21-3. [PMID: 18166773 DOI: 10.3324/haematol.12085] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Primary effusion lymphoma (PEL) was initially designated as a body-cavity-based lymphoma and recognized as a distinct clinical entity without a contiguous tumor mass. PEL was first reported in patients with acquired immunodeficiency syndrome (AIDS) and the distinctive feature of PEL originally reported as a B-cell neoplasm characterized by infection of the tumor cells by human herpes virus 8 (HHV-8). However, there have recently been several reports of PEL in patients without human immunodeficiency virus (HIV) or HHV-8 infection.
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Sunairi M, Tsuchiya H, Tsuchiya T, Omura Y, Koyanagi Y, Ozawa M, Iwabuchi N, Murooka H, Nakajima M. Isolation of a bacterium that causes anaaki disease of the red algaePorphyra yezoensis. ACTA ACUST UNITED AC 2008. [DOI: 10.1111/j.1365-2672.1995.tb00939.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sofuni A, Itoi T, Tsuchiya T, Itokawa F, Kurihara T, Moriyasu F, Kawai T. Endoscopic sealing of a pancreatic fistula using ethyl-2-cyanoacrylate. Endoscopy 2008; 38 Suppl 2:E71-2. [PMID: 17366426 DOI: 10.1055/s-2006-944723] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
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Higuchi Y, Kusakabe T, Tanemura T, Sugano K, Tsuchiya T, Tabata O. Manipulation system for nano/micro components integration via transportation and self-assembly. ACTA ACUST UNITED AC 2008. [DOI: 10.1109/memsys.2008.4443786] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Yoneyama S, Okaji Y, Tsuno NH, Kawai K, Yamashita H, Tsuchiya T, Yamada J, Sunami E, Osada T, Kitayama J, Takahashi K, Nagawa H. A study of dendritic and endothelial cell interactions in colon cancer in a cell line and small mammal model. Eur J Surg Oncol 2007; 33:1191-8. [PMID: 17314028 DOI: 10.1016/j.ejso.2007.01.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2006] [Accepted: 01/09/2007] [Indexed: 01/09/2023] Open
Abstract
AIM Historically, cancer therapy directly targeting tumor cells have yielded suboptimal clinical results, and therefore anti-angiogenic therapy that targets tumor cells indirectly through impairing tumor vasculature is now considered to be one of the novel approaches potentially effective against various types of cancer. In this study, we evaluated whether lysates of endothelium could be effectively pulsed in dendritic cells (DCs), to enhance their anti-tumor effects. METHODS For this purpose, we prepared DCs of BALB/c mouse, incubated them with lysates of autologous or xenogeneic endothelium, and tested their anti-tumor effects in two syngeneic models of colon cancer. RESULTS DCs pulsed with the respective endothelium lysates significantly inhibited the growth of subcutaneous tumors as well as pulmonary metastases in mice, and their anti-tumor effect was superior to that of unpulsed DCs. Immunohistopathological analysis showed significant decrease in the mean vascular density of tumors, correlating well with the extent of tumor inhibition. In vitro analysis of splenocytes isolated from immunized mice revealed an induction of cytotoxic T lymphocytes and activation of natural killer cells, with a lytic activity against activated endothelium but not tumor cells. In addition, antibodies reacting with activated endothelium, but not tumor cells, were detected in murine sera by ELISA, and their function was confirmed by complement-dependent cytotoxicity assay. CONCLUSIONS Our present results suggest that lysates of endothelium can be effectively pulsed in DCs and enhance their anti-tumor effects through induction of anti-angiogenesis, and therefore should have important clinical implications for adjuvant cancer therapy.
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