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Vervuurt RHJ, Mukherjee B, Nakane K, Tsutsumi T, Hori M, Kobayashi N. Reaction Mechanism and Selectivity Control of Si Compound ALE Based on Plasma Modification and F-Radical Exposure. Langmuir 2021; 37:12663-12672. [PMID: 34666489 DOI: 10.1021/acs.langmuir.1c02036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In this work, atomic layer etching (ALE) of Si compounds using H2 or N2 plasma modification followed by fluorine radical exposure is discussed. It is shown that the H2 plasma modification process promotes the selective etching of SiN, SiC, and SiCO versus SiO2. The N2 plasma modification, on the other hand, enables the selective etching of SiC and SiCO versus SiN and SiO2. The origin of the etching selectivity between different Si compounds is investigated using a combination of in situ SE and FTIR supported by several ex situ analysis techniques. It is shown that the formation of a hydrogen-rich layer after plasma modification is essential to enable the ALE process. The hydrogen-rich layer can be formed due to ion and radicals of the modification plasma (H2 plasma modification) or be a result of the reconfiguration of hydrogen that is already present in the film (N2 plasma modification). The obtained insights are expected to further enhance the etching selectivity of Si compound ALE processes. Furthermore, it is anticipated that the process can be extended to many other compound materials such as Ti and Hf, as well as enable selective etching between their oxides, carbides, and nitrides.
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Affiliation(s)
| | - B Mukherjee
- ASM Japan K.K., 23-1, 6-chome Nagayama, Tama, Tokyo 206-0025, Japan
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - K Nakane
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - T Tsutsumi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - M Hori
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - N Kobayashi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
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Hirano H, Matsunaga T, Maenosono R, Taniguchi S, Uehara H, Nomi H, Kano Y, Fujiwara Y, Ichihashi A, Kobayashi D, Tsutsumi T, Komura K, Ibuki N, Inamoto T, Matsumura H, Ashida A, Azuma H. Effect of Systematic Conversion to Generic Mycophenolate Mofetil (MMF) in Kidney Transplantation: A Single-Center Clinical Experience from Japan. Transplant Proc 2018; 50:3255-3257. [PMID: 30577194 DOI: 10.1016/j.transproceed.2018.04.064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 04/09/2018] [Accepted: 04/27/2018] [Indexed: 10/17/2022]
Abstract
INTRODUCTION Recently, more and more generic drugs have been used for immunosuppressive drugs in the field of organ transplantation. Some reports have indicated that blood concentration of most generic drugs is difficult to maintain stability, and it may cause the difference in graft survival of transplanted organs between original drugs and generic drugs. In this article, we report the cases could not maintain blood concentration of generic drugs of mycophenolate mofetil (MMF). RESULTS In 4 cases out of 5 cases that we had to change original MMF to generic MMF, there were cases that blood concentration level was not stabilized. There were possibility that the lowered blood concentration level of MMF caused a rejection, in two cases. Mean MMF trough level was decreased from 3.6 ± 1.9 μg/mL to 0.6 ± 0.4 μg/mL. Due to the early detection, it did not become severe or failure of graft function, however, we cannot deny the possibilities that side effects were increased and rejection rose. In these cases, we discontinued to use the generic drugs thereafter due to unstable plasma concentration of MMF. DISCUSSION Some reports have indicated that failure to maintain plasma concentration of MMF leads to rejection. Therefore, maintenance of effective plasma concentration and prevention of rejection are essential to long-term graft survival in kidney transplant. CONCLUSION Generic drug formulations may exhibit differences in effects and absorption compared to the brand-name drug. If the generic drug should be used, patients should be closely monitored.
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Affiliation(s)
- H Hirano
- Department of Urology, Osaka Medical College, Takatsuki, Japan.
| | - T Matsunaga
- Department of Urology, Osaka Medical College, Takatsuki, Japan
| | - R Maenosono
- Department of Urology, Osaka Medical College, Takatsuki, Japan
| | - S Taniguchi
- Department of Urology, Osaka Medical College, Takatsuki, Japan
| | - H Uehara
- Department of Urology, Osaka Medical College, Takatsuki, Japan
| | - H Nomi
- Department of Urology, Osaka Medical College, Takatsuki, Japan
| | - Y Kano
- Department of Urology, Osaka Medical College, Takatsuki, Japan
| | - Y Fujiwara
- Department of Urology, Osaka Medical College, Takatsuki, Japan
| | - A Ichihashi
- Department of Urology, Osaka Medical College, Takatsuki, Japan
| | - D Kobayashi
- Department of Urology, Osaka Medical College, Takatsuki, Japan
| | - T Tsutsumi
- Department of Urology, Osaka Medical College, Takatsuki, Japan
| | - K Komura
- Department of Urology, Osaka Medical College, Takatsuki, Japan
| | - N Ibuki
- Department of Urology, Osaka Medical College, Takatsuki, Japan
| | - T Inamoto
- Department of Urology, Osaka Medical College, Takatsuki, Japan
| | - H Matsumura
- Department of Pediatric, Osaka Medical College, Takatsuki, Japan
| | - A Ashida
- Department of Pediatric, Osaka Medical College, Takatsuki, Japan
| | - H Azuma
- Department of Urology, Osaka Medical College, Takatsuki, Japan
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Hirano H, Maenosono R, Matsunaga T, Uehara H, Nomi H, Ichihashi A, Kobayashi D, Taniguchi S, Tsutsumi T, Tsujino T, Komura K, Ibuki N, Inamoto T, Azuma H. Safety of Elderly Living Kidney Donors: 2 Cases of Donors Older Than 80 Years: A Case Report. Transplant Proc 2018; 50:2569-2571. [PMID: 30316400 DOI: 10.1016/j.transproceed.2018.03.093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Accepted: 03/02/2018] [Indexed: 11/26/2022]
Abstract
Much controversy exists over the performance of elderly living donor kidney transplantation. We report the safety of 2 cases of elderly living kidney donations in our hospital. CASE 1: An 82-year-old man was a living kidney donor for his 56-year-old son. The donor suffered from hypertension, but has successfully managed his blood pressure with only one medication. His serum creatinine was 0.7 mg/dL and inulin clearance was 122.5 mL/min, which met the usual criteria for living kidney donors. This was his son's secondary kidney transplantation, and no other donors existed. CASE 2: An 80-year-old woman was a living kidney donor for her 45-year-old son. Her serum creatinine was 0.61 mg/dL and inulin clearance was 71.7 mL/min, which met the marginal kidney donor criteria. In both cases, we determined that the donor kidney function was acceptable. Though we explained the risks of the transplantation thoroughly, the patients' strong will to offer a kidney to their family member did not change. We decided to carry out the transplantation. At the time of publication, nearly 2 years have passed since the transplantation, but both donors and recipients are doing well. In the future, it seems more likely that the number of elderly living donor kidney transplantation will rise. On one hand, there is no absolute contraindication for elderly donors, while on the other hand, the criteria for a living kidney donor must be strictly examined. Furthermore, careful observation of both donors and recipients after transplantation is required.
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Affiliation(s)
- H Hirano
- Department of Urology, Osaka Medical College, Osaka, Japan.
| | - R Maenosono
- Department of Urology, Osaka Medical College, Osaka, Japan
| | - T Matsunaga
- Department of Urology, Osaka Medical College, Osaka, Japan
| | - H Uehara
- Department of Urology, Osaka Medical College, Osaka, Japan
| | - H Nomi
- Department of Urology, Osaka Medical College, Osaka, Japan
| | - A Ichihashi
- Department of Urology, Osaka Medical College, Osaka, Japan
| | - D Kobayashi
- Department of Urology, Osaka Medical College, Osaka, Japan
| | - S Taniguchi
- Department of Urology, Osaka Medical College, Osaka, Japan
| | - T Tsutsumi
- Department of Urology, Osaka Medical College, Osaka, Japan
| | - T Tsujino
- Department of Urology, Osaka Medical College, Osaka, Japan
| | - K Komura
- Department of Urology, Osaka Medical College, Osaka, Japan
| | - N Ibuki
- Department of Urology, Osaka Medical College, Osaka, Japan
| | - T Inamoto
- Department of Urology, Osaka Medical College, Osaka, Japan
| | - H Azuma
- Department of Urology, Osaka Medical College, Osaka, Japan
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Suzuki Y, Inaba Y, Kajino K, Tsutsumi T. Surgical effects for OSAS patients in our department. Sleep Med 2017. [DOI: 10.1016/j.sleep.2017.11.942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Enzan N, Tsutsumi T, Imamura Y, Yamada A. P2735Physician presence in the emergency medical services improves neurological outcome of out-of-hospital cardiac arrest patients with non-shockable initial rhythm. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Tojino AL, Laymouna R, Monteiro A, Velcea A, Almeida Morais L, Enzan N, Wang TL, Kemaloglu Oz TUĞBA, Mursa A, Pfeiffer B, Tomaszewski M, Cuddy S, Giubertoni A, Rojo Prieto N, Ruivo C, Saito M, Dorobantu DM, Kemal HS, Sta Maria HF, Tiongco RP, Elsharkawy E, Morsy Y, Elshafei M, Elgowelly M, Almaghraby A, Branco L, Agapito A, Sousa L, Galrinho A, Pinto F, Rio P, Rosa S, Portugal G, Ferreira R, Mihaila S, Patrascu N, Adronic A, Cinteza M, Vinereanu D, Fiarresga A, Cacela D, Sousa L, Galrinho A, Branco L, Rodrigues R, Banazol N, Ferreira L, Ferreira R, Tsutsumi T, Matsumoto T, Uchida T, Yamada A, Hsiung MC, Eren MEHMET, Zarma L, Popescu BA, Ginghina C, Jurcut R, Neugebauer A, Rigopoulos A, Seggewiss H, Czekajska-Chehab E, Pietura R, Tomaszewski A, Sullivan V, Cosgrave J, Daly C, Murphy R, Zanaboni J, Gravellone M, Piccinino C, Marino PN, Lezcano Pertejo C, Hernandez Diez C, Alvarez Roy L, Martinez Paz E, Ascencio Lemus MG, Lopez Benito M, Fernandez-Vazquez F, Martin Gutierrez E, Castano Ruiz M, Guardado J, Santos L, Montenegro Sa F, Saraiva F, Correia J, Morais J, Mahara K, Ueda T, Ishii T, Hamamichi Y, Katsuragi S, Enache R, Platon P, Vladaia A, Popescu BA, Ginghina CD, Gunsel A, Cerit L, Duygu HS. Clinical Case Poster session 2P608Infective endocarditis in an adult female with bicuspid aortic valve, hypertrophic cardiomyopathy and amyopathic dermatomyositisP609Left ventricular massP610A rare case of mitral stenosis - Shones syndromeP611The added value of three-dimensional echocardiography in the late diagnosis of a pacemaker complication in a patient with severe congestive heart failureP612Percutaneous paravalvular leak closure - procedure pitfallsP613A case of late left ventricular pseudoaneurysm after aortic valve replacement for infective endocarditis.P614Pseudoaneurysm of right ventricle and acute heart failure caused by prosthetic aortic valve endocarditisP615A misclassification of pulmonary stenosis severity during pregnancyP616A problematic case of left ventricular hypertrophyP617High variability of dynamic obstruction in a patient with hypertrophic obstructive cardiomyopathy and tako-tsubo-cardiomyopathyP618Arterio-venous pulmonary fistula in patient after cerebral strokeP619Rapid myocardial calcification in acute sepsisP620Acute right heart failure after delivery in patient with new-diagnosed pulmonary arterial hypertensionP621When the right ventricle plays hide-and-seekP622Adult congenital heart disease: when what grows wrong goes wrongP623Prenatal diagnosis of mixed type total anomalous pulmonary venous connection in aspleniaP624Uncorrected single ventricle in an adult patient: do coexisting valvular abnormalities matter?P625Ventricular septal aneurysm associated with bicuspid aorta: a case report. Eur Heart J Cardiovasc Imaging 2016. [DOI: 10.1093/ehjci/jew249] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Sahu BB, Yin YY, Tsutsumi T, Hori M, Han JG. The role of plasma chemistry on functional silicon nitride film properties deposited at low-temperature by mixing two frequency powers using PECVD. Phys Chem Chem Phys 2016; 18:13033-44. [DOI: 10.1039/c6cp00986g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A correlation study of plasma parameters and film properties and the implication of dual frequency PECVD for industry are proposed.
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Affiliation(s)
- B. B. Sahu
- Center for Advanced Plasma Surface Technology (CAPST)
- NU-SKKU Joint Institute for Plasma Nano Materials
- Department of Advanced Materials Science and Engineering
- Sungkyunkwan University
- Suwon 440-746
| | - Y. Y. Yin
- Center for Advanced Plasma Surface Technology (CAPST)
- NU-SKKU Joint Institute for Plasma Nano Materials
- Department of Advanced Materials Science and Engineering
- Sungkyunkwan University
- Suwon 440-746
| | - T. Tsutsumi
- Plasma Nanotechnology Research Center
- Nagoya University
- Nagoya
- Japan
| | - M. Hori
- Plasma Nanotechnology Research Center
- Nagoya University
- Nagoya
- Japan
| | - Jeon G. Han
- Center for Advanced Plasma Surface Technology (CAPST)
- NU-SKKU Joint Institute for Plasma Nano Materials
- Department of Advanced Materials Science and Engineering
- Sungkyunkwan University
- Suwon 440-746
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Abstract
Excessive mechanical stress (MS) during hyperocclusion is known to result in disappearance of the alveolar hard line, enlargement of the periodontal ligament (PDL) space, and destruction of alveolar bone, leading to occlusal traumatism. We have recently reported that MS induces predominantly C-C chemokine ligand (CCL) 2 expression in PDL tissues, leading, via C-C chemokine receptor (CCR) 2, to MS-dependent osteoclastogenesis in alveolar bone. Thus, we hypothesize that ablation of the CCL2/CCR2 signaling pathway should suppress MS-induced osteoclastogenesis-associated chemokines and alleviate occlusal traumatism. We examined the effect of MS on chemokine expression and osteoclastogenesis using in vivo and in vitro hyperocclusion models with CCL2-deficient (CCL2(-/-)) and CCR2-deficient (CCR2(-/-)) mice. Compared with that in wild-type mice, expression of CCL3 in PDL cells and TRAP-positive cells in alveolar bone from CCL2(-/-) and CCR2(-/-) mice was up-regulated, even in the absence of MS. Furthermore, the expression of CCL3 and TRAP-positive cells was significantly increased after both 4 and 7 days of hyperocclusal MS loading in CCL2(-/-) and CCR2(-/-) mice. Hyperocclusion induced compensatory CCL3 expression and promoted osteoclastogenesis to counterbalance deficient CCL2/CCR2 signaling, suggesting that co-expression of CCL3 with CCL2 may precipitate synergistic, MS-dependent alveolar bone destruction during occlusal traumatism. Abbreviations: MS, mechanical stress; PDL, periodontal ligament; CCL2, CC chemokine ligand 2 (MCP-1; monocyte chemoattractant protein-1); CCR2, CC chemokine receptor 2; CCL3, CC chemokine ligand 3 (MIP-1α); CCL5, CC chemokine ligand 5 (RANTES).
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Affiliation(s)
- T. Tsutsumi
- Department of Physiological Science and Molecular Biology, Fukuoka Dental College, 2-15-1 Tamura, Sawara-ku, Fukuoka 8140193, Japan
- Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka, Japan
| | - H. Kajiya
- Department of Physiological Science and Molecular Biology, Fukuoka Dental College, 2-15-1 Tamura, Sawara-ku, Fukuoka 8140193, Japan
| | - K.T. Goto
- Department of Dental Hygiene, Fukuoka College of Health Sciences, Fukuoka, Japan
| | - Y. Takahashi
- Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka, Japan
| | - K. Okabe
- Department of Physiological Science and Molecular Biology, Fukuoka Dental College, 2-15-1 Tamura, Sawara-ku, Fukuoka 8140193, Japan
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Goto F, Tsutsumi T, Kabeya M, Ogawa K. Outcomes of autogenic training for patients with chronic subjective dizziness. J Psychosom Res 2012; 72:410-1. [PMID: 22469287 DOI: 10.1016/j.jpsychores.2012.01.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Revised: 01/25/2012] [Accepted: 01/27/2012] [Indexed: 11/26/2022]
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Abstract
Excessive mechanical stress (MS) during hyperocclusion is known to result in disappearance of the alveolar hard line, enlargement of the periodontal ligament (PDL) space, and destruction of alveolar bone, leading to occlusal traumatism. We hypothesized that MS induces expression of osteoclastogenesis-associated chemokines in PDL tissue, resulting in chemotaxis and osteoclastogenesis during occlusal traumatism. We examined the effect of MS on relationships between chemokine expression and osteoclastogenesis using in vivo and in vitro hyperocclusion models. In an in vitro model, intermittent stretching-induced MS was shown to up-regulate the expression of CC chemokine ligand (CCL)2, CCL3, and CCL5 in PDL cells. The expression levels of CCL2 in PDL tissues, its receptor CCR2 in pre-osteoclasts, and tartrate-resistant acid-phosphatase-positive cells in alveolar bone were significantly up-regulated 4-7 days after excessive MS during hyperocclusion in in vivo rodent models. Hyperocclusion predominantly induced CCL2 expression in PDL tissues and promoted chemotaxis and osteoclastogenesis, leading to MS-dependent alveolar bone destruction during occlusal traumatism. Abbreviations: MS, mechanical stress; PDL, periodontal ligament; CCL2, CC chemokine ligand 2; MCP-1, monocyte chemoattractant protein-1; CCR2, CC chemokine receptor 2; CCL3, CC chemokine ligand 3 (MIP-1α); CCL5, CC chemokine ligand 5 (RANTES); CXCL12, CXC chemokine ligand 12 (SDF-1).
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Affiliation(s)
- K.T. Goto
- Department of Dental Hygiene, Fukuoka College of Health Sciences, Fukuoka 8140193, Japan Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka 8140193, Japan
| | - H. Kajiya
- Department of Physiological Science and Molecular Biology, Fukuoka Dental College, 2-15-1 Tamura, Sawara-ku, Fukuoka 8140193, Japan
| | - T. Nemoto
- Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka 8140193, Japan Department of Physiological Science and Molecular Biology, Fukuoka Dental College, 2-15-1 Tamura, Sawara-ku, Fukuoka 8140193, Japan
| | - T. Tsutsumi
- Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka 8140193, Japan Department of Physiological Science and Molecular Biology, Fukuoka Dental College, 2-15-1 Tamura, Sawara-ku, Fukuoka 8140193, Japan
| | - T. Tsuzuki
- Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka 8140193, Japan
| | - H. Sato
- Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka 8140193, Japan
| | - K. Okabe
- Department of Physiological Science and Molecular Biology, Fukuoka Dental College, 2-15-1 Tamura, Sawara-ku, Fukuoka 8140193, Japan
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Lee SK, Lee KE, Hwang YH, Kida M, Tsutsumi T, Ariga T, Park JC, Kim JW. Identification of the DSPP mutation in a new kindred and phenotype-genotype correlation. Oral Dis 2010; 17:314-9. [DOI: 10.1111/j.1601-0825.2010.01760.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Nakagawa R, Murata S, Ashizuka Y, Shintani Y, Hori T, Tsutsumi T. Hexabromocyclododecane determination in seafood samples collected from Japanese coastal areas. Chemosphere 2010; 81:445-452. [PMID: 20825970 DOI: 10.1016/j.chemosphere.2010.08.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Revised: 08/08/2010] [Accepted: 08/09/2010] [Indexed: 05/29/2023]
Abstract
The levels of three hexabromocyclododecane (HBCD) isomers and ΣHBCDs in 54 wild and 11 farmed seafood samples collected from four regions of Japan were determined by LC/MS/MS. For the fish classified as Anguilliformes, Perciformes, Clupeiformes and farmed Salmoniformes, the medians (ranges) of ΣHBCDs are 2.09 (0.05-36.9), 0.75 (ND-26.2), 0.12 (0.09-77.3) and 1.29 (1.09-1.34) ng g(-1)ww, respectively. However, HBCDs were not detected in samples classified as Crustacea, Mollusca, Pleuronectiformes and Scorpaeniformes, or if detected, the levels were very low. The rank correlation between ΣHBCDs (or α-HBCD) and fat content could not be found except for the Japanese sea bass of the Tohoku region. In HBCD isomer profiles, for fish samples above 20 ng g(-1)ww, the trend was found that γ-HBCD was predominant, which suggests the influence of discharge from a nearby industrial plant. In the other wild fish and the farmed fish samples, on the other hand, α-HBCD was mostly predominant, which suggests biomagnification via the food chain. Additionally, to assess the risk to human health, based on the determined HBCD median concentrations for Anguilliformes, farmed Salmoniformes and Perciformes, the daily intake of HBCDs from fish by an average Japanese adult was tentatively calculated to be 3.7, 2.3 and 1.3 ng (kg body weight)(-1) d(-1), respectively.
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Affiliation(s)
- R Nakagawa
- Fukuoka Institute of Health and Environmental Sciences, 39 Mukaizano, Dazaifu-shi, Fukuoka 818-0135, Japan.
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Tsutsumi T, Nagata S, Yoshida F, Ueno Y, Harada KI. Development and Application of Highly Sensitive Anti-immune Complex ELISAs for Microcystins in Tap Water. FOOD AGR IMMUNOL 2010. [DOI: 10.1080/09540100050140768] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Affiliation(s)
- T. Tsutsumi
- a Research Institute for Biosciences and Department of Toxicology and Microbial Chemistry, Faculty of Pharmaceutical Sciences , Science University of Tokyo , Ichigaya Shinjuku-ku, Tokyo , 162-0826 , Japan
| | - S. Nagata
- a Research Institute for Biosciences and Department of Toxicology and Microbial Chemistry, Faculty of Pharmaceutical Sciences , Science University of Tokyo , Ichigaya Shinjuku-ku, Tokyo , 162-0826 , Japan
| | - F. Yoshida
- a Research Institute for Biosciences and Department of Toxicology and Microbial Chemistry, Faculty of Pharmaceutical Sciences , Science University of Tokyo , Ichigaya Shinjuku-ku, Tokyo , 162-0826 , Japan
| | - Y. Ueno
- a Research Institute for Biosciences and Department of Toxicology and Microbial Chemistry, Faculty of Pharmaceutical Sciences , Science University of Tokyo , Ichigaya Shinjuku-ku, Tokyo , 162-0826 , Japan
| | - K.-I. Harada
- b Faculty of Pharmacy , Meijo University , Tempaku , Nagoya , 4680077 , Japan
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Tsutsumi T, Takeshi T, Nakashima K, Keisuke N, Isoda T, Takaaki I, Yokota M, Makoto Y, Nishihara T, Tatsuji N. Involvement of adhesion molecule in in vitro plaque-like formation of macrophages stimulated with Aggregatibacter actinomycetemcomitans lipopolysaccharide. J Periodontal Res 2010; 45:550-6. [PMID: 20412415 DOI: 10.1111/j.1600-0765.2010.01270.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND AND OBJECTIVE Inflammatory agents, such as lipopolysaccharide (LPS), in periodontal pockets may promote atherogenesis by activating leukocytes. In our previous study, we developed a microchannel chip to observe the cell adhesion process in a fluid system. The objective of this investigation was to examine the mechanism by which periodontopathic bacterial LPS enhances plaque-like formation on a microchannel chip. MATERIAL AND METHODS To evaluate the effect of Aggregatibacter actinomycetemcomitans LPS on the expression of adhesion molecules, e.g. intercellular adhesion molecule 1 (ICAM-1), lymphocyte function-associated antigen 1 (LFA-1) and L-selectin, on the surface of murine macrophage RAW264.7 cells, the expression of each adhesion molecule was examined by flow cytometry and western blot analysis. Moreover, a flow test on the microchannel chip involving anti-adhesion molecule antibodies was conducted to clarify which adhesion molecule is related to plaque-like formation of RAW264.7 cells. RESULTS The expressions of ICAM-1 and LFA-1 on the surface of RAW 264.7 cells increased following 12 h culture with LPS; L-selectin expression was unaffected. An increase in ICAM-1 expression was also confirmed by western blot analysis. The flow test revealed that anti-ICAM-1 antibody inhibited plaque-like formation of LPS-stimulated macrophages on the micropillars of the microchannel chip. CONCLUSION These findings indicate that ICAM-1 plays an important role in plaque-like formation of LPS-stimulated macrophages. Our microchannel chip is a suitable tool for the investigation of etiological factors of atherosclerosis, including periodontitis, in vitro.
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Affiliation(s)
- T Tsutsumi
- Division of Periodontology, Department of Cardiology and Periodontology, Kyushu Dental College, Kitakyushu, Japan
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Isoda T, Tsutsumi T, Yamazaki K, Nishihara T. Measurement of plaque-forming macrophages activated by lipopolysaccharide in a micro-channel chip. J Periodontal Res 2009; 44:609-15. [DOI: 10.1111/j.1600-0765.2008.01167.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Nakajima T, Kubota N, Tsutsumi T, Oguri A, Imuta H, Jo T, Oonuma H, Soma M, Meguro K, Takano H, Nagase T, Nagata T. Eicosapentaenoic acid inhibits voltage-gated sodium channels and invasiveness in prostate cancer cells. Br J Pharmacol 2009; 156:420-31. [PMID: 19154441 DOI: 10.1111/j.1476-5381.2008.00059.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND AND PURPOSE The voltage-gated Na(+) channels (Na(v)) and their corresponding current (I(Na)) are involved in several cellular processes, crucial to metastasis of cancer cells. We investigated the effects of eicosapentaenoic (EPA), an omega-3 polyunsaturated fatty acid, on I(Na) and metastatic functions (cell proliferation, endocytosis and invasion) in human and rat prostate cancer cell lines (PC-3 and Mat-LyLu cells). EXPERIMENTAL APPROACH The whole-cell voltage clamp technique and conventional/quantitative real-time reverse transcriptase polymerase chain reaction analysis were used. The presence of Na(v) proteins was shown by immunohistochemical methods. Alterations in the fatty acid composition of phospholipids after treatment with EPA and metastatic functions were also examined. KEY RESULTS A transient inward Na(+) current (I(Na)), highly sensitive to tetrodotoxin, and Na(V) proteins were found in these cells. Expression of Na(V)1.6 and Na(V)1.7 transcripts (SCN8A and SCN9A) was predominant in PC-3 cells, while Na(V)1.7 transcript (SCN9A) was the major component in Mat-LyLu cells. Tetrodotoxin or synthetic small interfering RNA targeted for SCN8A and SCN9A inhibited metastatic functions (endocytosis and invasion), but failed to inhibit proliferation in PC-3 cells. Exposure to EPA produced a rapid and concentration-dependent suppression of I(Na). In cells chronically treated (up to 72h) with EPA, the EPA content of cell lipids increased time-dependently, while arachidonic acid content decreased. Treatment of PC-3 cells with EPA decreased levels of mRNA for SCN9A and SCN8A, cell proliferation, invasion and endocytosis. CONCLUSION AND IMPLICATIONS Treatment with EPA inhibited I(Na) directly and also indirectly, by down-regulation of Na(v) mRNA expression in prostate cancer cells, thus inhibiting their metastatic potential.
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Affiliation(s)
- T Nakajima
- Department of Ischemic Circulatory Physiology, The University of Tokyo, Japan.
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Kubota N, Takano H, Tsutsumi T, Kurano M, Iida H, Yasuda T, Meguro K, Morita T, Sato Y, Kawashima S, Yamazaki Y, Ohshima H, Tachibana S, Ishii N, Abe T, Nakajima T. Resistance exercise combined with KAATSU during simulated weightlessness. ACTA ACUST UNITED AC 2008. [DOI: 10.3806/ijktr.4.9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Tsutsumi T, Houtani T, Toida K, Kase M, Yamashita T, Ishimura K, Sugimoto T. Vesicular acetylcholine transporter–immunoreactive axon terminals enriched in the pontine nuclei of the mouse. Neuroscience 2007; 146:1869-78. [PMID: 17462828 DOI: 10.1016/j.neuroscience.2007.03.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2007] [Revised: 03/06/2007] [Accepted: 03/10/2007] [Indexed: 11/28/2022]
Abstract
Information to the cerebellum enters via many afferent sources collectively known as precerebellar nuclei. We investigated the distribution of cholinergic terminal-like structures in the mouse precerebellar nuclei by immunohistochemistry for vesicular acetylcholine transporter (VAChT). VAChT is involved in acetylcholine transport into synaptic vesicles and is regarded as a reliable marker for cholinergic terminals and preterminal axons. In adult male mice, brains were perfusion-fixed. Polyclonal antibodies for VAChT, immunoglobulin G-peroxidase and diaminobenzidine were used for immunostaining. In the mouse brain, immunoreactivity was seen in almost all major cholinergic cell groups including brainstem motoneurons. In precerebellar nuclei, the signal could be detected as diffusely beaded terminal-like structures. It was seen heaviest in the pontine nuclei and moderate in the pontine reticulotegmental nucleus; however, it was seen less in the medial solitary nucleus, red nucleus, lateral reticular nucleus, inferior olivary nucleus, external cuneate nucleus and vestibular nuclear complex. In particular, VAChT-immunoreactive varicose fibers were so dense in the pontine nuclei that detailed distribution was studied using three-dimensional reconstruction of the pontine nuclei. VAChT-like immunoreactivity clustered predominantly in the medial and ventral regions suggesting a unique regional difference of the cholinergic input. Electron microscopic observation in the pontine nuclei disclosed ultrastructural features of VAChT-immunoreactive varicosities. The labeled bouton makes a symmetrical synapse with unlabeled dendrites and contains pleomorphic synaptic vesicles. To clarify the neurons of origin of VAChT-immunoreactive terminals, VAChT immunostaining combined with wheat germ agglutinin-conjugated horseradish peroxidase retrograde labeling was conducted by injecting a retrograde tracer into the right pontine nuclei. Double-labeled neurons were seen bilaterally in the laterodorsal tegmental nucleus and pedunculopontine tegmental nucleus. It is assumed that mesopontine cholinergic neurons negatively regulate neocortico-ponto-cerebellar projections at the level of pontine nuclei.
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Affiliation(s)
- T Tsutsumi
- Department of Anatomy and Brain Science, Kansai Medical University, Moriguchi, Osaka 570-8506, Japan
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Abstract
Angiosarcomas rarely arise from schwannomas, but we describe here a case of angiosarcoma that arose from a remnant of a benign vestibular schwannoma that had been removed 10 years earlier. The patient was a 66-year-old man with no sign of neurofibromatosis. Although we attempted surgical resection, we could not totally remove the tumour. The patient died nine months after diagnosis, primarily as result of an abscess in the cerebellum and base of the skull. The histological diagnosis was confirmed by the immunohistochemical findings of positivity for CD34 antigen and S-100 protein in the resected tumour.A review of the literature revealed four other cases of angiosarcoma with schwannoma, all of which arose from an extracranial nerve. The present case is the first report of an angiosarcoma with schwannoma arising from an intracranial locus.
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Affiliation(s)
- T Ito
- Department of Otolaryngology, Tokyo Medical and Dental University, Tokyo, Japan.
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20
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Nakamura H, Wada H, Origuchi T, Kawakami A, Taura N, Aramaki T, Fujikawa K, Iwanaga N, Izumi Y, Aratake K, Ida H, Taguchi T, Irie J, Akiyama M, Mizokami A, Tsutsumi T, Eguchi K. A case of IgG4-related autoimmune disease with multiple organ involvement. Scand J Rheumatol 2006; 35:69-71. [PMID: 16467047 DOI: 10.1080/03009740500499484] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A 52-year-old male was admitted with autoimmune pancreatitis (AIP), showing mononuclear cell infiltration in both the pancreas and salivary glands with both normal sialography and anti-SS-A/SS-B antibodies. Although the AIP improved with glucocorticoid treatment, subsequent abdominal computed tomography (CT) revealed a nodular shadow in the bilateral kidneys, which was confirmed as interstitial nephritis by renal biopsy. The patient's serum immunoglobulin G4 (IgG4) level was 10 times higher than the upper limit of the normal range. IgG4-positive mononuclear cell infiltration was detected in the salivary gland, pancreas, and kidney. A new entity proposed as 'IgG4-related autoimmune disease' was considered.
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Affiliation(s)
- H Nakamura
- The First Department of Internal Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Japan.
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21
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Chen ZL, Kumar GR, Sheng ZM, Matsuoka T, Sentoku Y, Tampo M, Tanaka KA, Tsutsumi T, Yabuuchi T, Kodama R. Transient electrostatic fields and related energetic proton generation with a plasma fiber. Phys Rev Lett 2006; 96:084802. [PMID: 16606190 DOI: 10.1103/physrevlett.96.084802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2005] [Indexed: 05/08/2023]
Abstract
We observe a hollow structure and a fine ring in the proton images from a petawatt scale laser interaction with a "cone-fiber" target. The protons related to the hollow structure are accelerated from the cone-tip surface and deflected later by a radial electric field surrounding the fiber. Those associated with the fine ring are accelerated from the fiber surface by this radial electric field. This field is found to decay exponentially within 3 ps from about 5 x 10(12) V/m. Two-dimensional particle-in-cell simulations produce similar proton angular distributions.
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Affiliation(s)
- Z L Chen
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan.
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22
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Li YT, Sheng ZM, Ma YY, Jin Z, Zhang J, Chen ZL, Kodama R, Matsuoka T, Tampo M, Tanaka KA, Tsutsumi T, Yabuuchi T, Du K, Zhang HQ, Zhang L, Tang YJ. Demonstration of bulk acceleration of ions in ultraintense laser interactions with low-density foams. Phys Rev E Stat Nonlin Soft Matter Phys 2005; 72:066404. [PMID: 16486067 DOI: 10.1103/physreve.72.066404] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2004] [Revised: 02/22/2005] [Indexed: 05/06/2023]
Abstract
Ion acceleration inside low-density foams irradiated by ultraintense laser pulses has been studied experimentally and theoretically. It is found that the ion generation is closely correlated with the suppressed hot electron transport inside the foams. Particle-in-cell simulations suggest that localized electrostatic fields with multi peaks around the surfaces of lamellar layers inside the foams are induced. These fields inhibit hot electron transport and meanwhile accelerate ions inside the foams, forming a bulk acceleration in contrast to the surface acceleration at the front and rear sides of a thin solid target.
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Affiliation(s)
- Y T Li
- Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
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23
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Chen ZL, Kodama R, Nakatsutsumi M, Nakamura H, Tampo M, Tanaka KA, Toyama Y, Tsutsumi T, Yabuuchi T. Enhancement of energetic electrons and protons by cone guiding of laser light. Phys Rev E Stat Nonlin Soft Matter Phys 2005; 71:036403. [PMID: 15903584 DOI: 10.1103/physreve.71.036403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2004] [Revised: 07/26/2004] [Indexed: 05/02/2023]
Abstract
Energetic electrons and protons are observed when a target consisting of a reentrant cone with a disk at the tip is irradiated by a petawatt (PW) laser at an intensity of approximately 10(19) W cm(-2). The angular distribution of the electrons and protons, dependent on the open angle of the reentrant cone, is found to differ from that in the case when a target with planar geometry is used. Two jet beams are observed, in directions parallel to the cone axis and normal to the cone-shaped wall. The number and cutoff energies of the generated protons are also related to the open angle of the cone. The efficiency of the generation of energetic electrons from the cone target is 2-3 times higher than that from a simple plane target. These results indicate a guiding of the PW laser beam in the cone geometry.
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Affiliation(s)
- Z L Chen
- Institute of Laser Engineering, Osaka University, Japan.
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24
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Li YT, Zhang J, Sheng ZM, Zheng J, Chen ZL, Kodama R, Matsuoka T, Tampo M, Tanaka KA, Tsutsumi T, Yabuuchi T. High-energy electrons produced in subpicosecond laser-plasma interactions from subrelativistic laser intensities to relativistic intensities. Phys Rev E Stat Nonlin Soft Matter Phys 2004; 69:036405. [PMID: 15089413 DOI: 10.1103/physreve.69.036405] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2003] [Indexed: 05/24/2023]
Abstract
The characteristics of the forward hot electrons produced by subpicosecond laser-plasma interactions are studied for different laser polarizations at laser intensities from subrelativistic to relativistic. The peak of the hot electron beam produced by p-polarized laser beam shifts to the laser propagation direction from the target normal direction as the laser intensity reaches the relativistic. For s-polarized laser pulse, hot electrons are mainly directed to the laser axis direction. The temperature and the maximum energy of hot electrons are much higher than that expected by the empirical scaling law. The energy spectra of the hot electrons evolve to be a single-temperature structure at relativistic laser intensities from the two-temperature structure at subrelativistic intensities. For relativistic laser intensities, the forward hot electrons are less dependent on the laser polarization under the laser conditions. The existing of a preplasma formed by the laser amplified spontaneous emission pedestal plays an important role in the interaction. One-dimensional particle-in-cell simulations reproduce the most characteristics observed in the experiment.
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Affiliation(s)
- Y T Li
- Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
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25
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Tsutsumi T, Holmes SE, McInnis MG, Sawa A, Callahan C, DePaulo JR, Ross CA, DeLisi LE, Margolis RL. Novel CAG/CTG repeat expansion mutations do not contribute to the genetic risk for most cases of bipolar disorder or schizophrenia. Am J Med Genet B Neuropsychiatr Genet 2004; 124B:15-9. [PMID: 14681907 DOI: 10.1002/ajmg.b.20058] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The possible presence of anticipation in bipolar affective disorder and schizophrenia has led to the hypothesis that repeat expansion mutations could contribute to the genetic etiology of these diseases. Using the repeat expansion detection (RED) assay, we have systematically examined genomic DNA from 100 unrelated probands with schizophrenia and 68 unrelated probands with bipolar affective disorder for the presence of CAG/CTG repeat expansions. Our results show that 28% of the probands with schizophrenia and 30% of probands with bipolar disorder have a CAG/CTG repeat in the expanded range, but that each expansion could be explained by one of three nonpathogenic repeat expansions known to exist in the general population. We conclude that novel CAG/CTG repeat expansions are not a common genetic risk factor for bipolar disorder or schizophrenia.
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Affiliation(s)
- T Tsutsumi
- Division of Neurobiology, Department of Psychiatry, Johns Hopkins University of School of Medicine, Baltimore, Maryland, USA
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26
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Onimaru M, Yonemitsu Y, Tanii M, Tsutsumi T, Nakagawa K, Nakashima Y, Sueishi K. Involvement of VEGF-C/flt-4 system in therapeutic angiogenesis of FGF-2 gene transfer in murine ischemic hind limb. J Thromb Haemost 2003. [DOI: 10.1111/j.1538-7836.2003.tb03472.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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27
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Nakahara T, Kuroki T, Ohta E, Kajihata T, Yamada H, Yamanaka M, Hashimoto K, Tsutsumi T, Hirano M, Uchimura H. Effect of the neurotoxic dose of methamphetamine on gene expression of parkin and Pael-receptors in rat striatum. Parkinsonism Relat Disord 2003; 9:213-9. [PMID: 12618056 DOI: 10.1016/s1353-8020(02)00052-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We previously reported that haloperidol, a dopamine-D(2) receptor antagonist, induced striatal expression of parkin gene, which mutations cause autosomal recessive juvenile parkinsonism. Because of an involvement of the parkin gene defect in selective degeneration of dopaminergic neurons, we herein examined the effect of the neurotoxic dose of methamphetamine (METH; 40 mg/kg, i.p.) on gene expression of parkin and its substrate Pael-receptor (R) in the dopamine-rich areas of the rat brain, using reverse transcription-polymerase chain reaction. parkin mRNA levels in the striatum, but not in other regions, decreased at 1 and 2 h and returned to the pre-drug basal levels at 4 h after METH administration. METH also decreased Pael-R mRNA levels in the striatum and substantia nigra within 2 h after METH, while haloperidol (2 mg/kg, s.c.) increased Pael-R mRNA levels in the substantia nigra at 2 h after administration. These results suggest that temporary suppression of gene expression of parkin and Pael-R may be associated with the METH-induced dopaminergic neurotoxicity. Taken together with our previous report, dopaminergic modulation of the expression of parkin and Pael-R genes in the nigro-striatal pathway may have significant implication for pathophysiology and treatment of parkinson disease.
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Affiliation(s)
- T Nakahara
- Department of Chemistry, Faculty of Science, Kyushu University, Ropponmatsu, Fukuoka 810-8560, Japan.
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Isogawa K, Fujiki M, Akiyoshi J, Tsutsumi T, Horinouchi Y, Kodama K, Nagayama H. Anxiety induced by repetitive transcranial magnetic stimulation is suppressed by chronic treatment of paroxetine in rats. Pharmacopsychiatry 2003; 36:7-11. [PMID: 12649768 DOI: 10.1055/s-2003-38085] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Repetitive transcranial magnetic stimulation (rTMS) has been shown to have a therapeutic effect on affective disorder and anxiety disorders. However, some reports have linked rTMS to a significant increase in anxiety in normal volunteers. This study investigates the effect of rTMS on anxiety and the use of acute and chronic paroxetine treatment on this animal model of anxiety. In normal rats, rTMS for 10 days induced anxiety, as shown by elevated plus maze, black and white box, and conditioned fear tests. This anxiety was suppressed by chronic, but not acute, paroxetine. These results suggest that rats receiving chronic rTMS treatment can be used as a model of anxiety and that the anxiety induced by rTMS might involve the serotonergic system.
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Affiliation(s)
- K Isogawa
- Department of Neuropsychiatry, Oita Medical University, Hasama-Machi, Japan
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29
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Nishida Y, Yamada M, Hara K, Tsunemi T, Yamawaki M, Shimokawa R, Okeda R, Tsutsumi T, Mizusawa H. Creutzfeldt-Jakob disease after Jannetta's operation with cadaveric dura mater graft: initial manifestations related to the grafted site. J Neurol 2002; 249:480-3. [PMID: 11967658 DOI: 10.1007/s004150200055] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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30
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Tsutsumi T, Kitamura K, Tsunoda A, Noguchi Y, Mitsuhashi M. Electronystagmographic findings in patients with cerebral degenerative disease. Acta Otolaryngol Suppl 2002; 545:136-9. [PMID: 11677727 DOI: 10.1080/000164801750388315] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Cerebral degenerative diseases produce a variety of abnormal neuro-otological findings on electronystamography (ENG). To assess their diagnostic value and determine which manifestations are helpful in making a diagnosis, ENG findings from 72 cases of confirmed cerebral degenerative disease were analyzed. We observed a high incidence of saccadic pursuit and upward ocular dysmetria, which is likely to be useful in diagnosing cerebral degenerative disease. In contrast, moderate incidences of horizontal ocular dysmetria, gaze-evoked and rebound nystagmus, vertical positioning nystagmus and impaired visual suppression appeared to reflect the degree of dysfunction, while optokinetic nystagmus appeared to reflect both the presence of disease and its severity. Cases of spinocerebellar ataxia 6 and spinocerebellar ataxia 3 tended to produce horizontal and vertical gaze-evoked nystagmus, whereas progressive supranuclear palsy produced a higher incidence of upward gaze-evoked nystagmus, and positioning nystagmus at the sagittal plane appeared frequently in cases of non-hereditary spinocerebellar degeneration.
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Affiliation(s)
- T Tsutsumi
- Department of Otolaryngology, Tokyo Medical and Dental University, Tokyo, Japan.
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31
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Katsuragi S, Kiyota A, Tsutsumi T, Isogawa K, Nagayama H, Arinami T, Akiyoshi J. Lack of association between a polymorphism in the promoter region of the dopamine D2 receptor and personality traits. Psychiatry Res 2001; 105:123-7. [PMID: 11740982 DOI: 10.1016/s0165-1781(01)00331-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Disturbances of the dopaminergic neurotransmitter system have been associated with a personality trait that involves novelty seeking. A functional polymorphism in the promoter region of the dopamine D2 receptor gene (DRD2) has been reported to be associated with schizophrenia. We examined the association between this polymorphism in the DRD2 promoter region and personality traits, as assessed with the Tridimensional Personality Questionnaire. No significant association emerged between the polymorphism in the DRD2 promoter region and personality traits. Entering sex and age as covariates in an analysis of covariance did not change the results. These data fail to confirm an association between a polymorphism in the promoter region of the DRD2 and personality traits.
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Affiliation(s)
- S Katsuragi
- Department of Neuropsychiatry, Oita Medical University, Hasama-Machi, 879-5593, Oita, Japan
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Suzuki T, Tsutsumi T, Suzuki R, Aizaki H. [Report on 8th International Symposium on Hepatitis C Virus and Related Viruses]. Uirusu 2001; 51:241-6. [PMID: 12017124 DOI: 10.2222/jsv.51.241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
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33
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Tsutsumi T, Yanagi T, Nakamura M, Kono Y, Uchibe H, Iida T, Hori T, Nakagawa R, Tobiishi K, Matsuda R, Sasaki K, Toyoda M. Update of daily intake of PCDDs, PCDFs, and dioxin-like PCBs from food in Japan. Chemosphere 2001; 45:1129-1137. [PMID: 11695626 DOI: 10.1016/s0045-6535(01)00151-5] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Total diet study (TDS) samples of 14 food groups from 16 locations in Japan, collected in 1999 and 2000, were analyzed for polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs), and dioxin-like polychlorinated biphenyls (dioxin-like PCBs) to estimate the update of daily intake of these contaminants from food. The mean daily intake of toxic equivalency (TEQ) for an adult weighing 50 kg, calculated at non-detected isomer concentrations equal to zero (ND = 0), was estimated to be 2.25 pg TEQ/kg b.w./day. When non-detected isomer concentrations are assumed to be equal to half of the limits of detection (ND = 1/2 LOD), the mean daily intake was estimated to be 3.22 pg TEQ/kg b.w./day. These values were below the tolerable daily intake (TDI) of 4 pg TEQ/kg b.w. for PCDD/Fs and dioxin-like PCBs set in Japan. In both the estimates, the mean daily intakes were highest from fish and shellfish (76.9% at ND = 0 and 53.9% at ND = 1/2 LOD of the total TEQs), followed by those from meat and eggs (15.5% at ND = 0 and 11.7% at ND = 1/2 LOD of the total TEQs). Congener specific data revealed that these total TEQ levels were dominated by 1,2,3,7,8-PeCDD, 2,3,4,7,8-PeCDF and 3,3',4,4',5-PeCB in each case (71.7% at ND = 0 and 63.1% at ND = 1/2 LOD of the total TEQs). The dioxin-like PCBs (non-ortho and mono-ortho PCBs) accounted for about 50% of these total TEQs. These data will be very useful in the risk assessment of PCDD/Fs and dioxin-like PCBs from food in Japan.
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Affiliation(s)
- T Tsutsumi
- Division of Foods, National Institute of Health Sciences, Tokyo, Japan.
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Tsutsumi T, Akiyoshi J, Hikichi T, Kiyota A, Kohno Y, Katsuragi S, Yamamoto Y, Isogawa K, Nagayama H. Suppression of conditioned fear by administration of CCKB receptor antisense oligodeoxynucleotide into the lateral ventricle. Pharmacopsychiatry 2001; 34:232-7. [PMID: 11778143 DOI: 10.1055/s-2001-18030] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
We investigated the role of CCK in the development of anxiety by determining whether CCKB receptor antisense suppressed intracellular Ca(2+) concentration in vitro or suppressed conditioned fear stress in vivo. First, for the in vitro studies, we used rat pituitary tumor GH3 cells since these cells have CCKB receptors. GH3 cells were stimulated by 10 microM CCK-4; intracellular Ca(2+) concentration was measured. The CCKB receptor antisense at 1 or 10 microM reduced the subsequent response to 10 microM CCK-4 in a time-dependent manner. Second, for the in vivo studies, the CCKB receptor antisense, sense, random sense, or saline was infused at a constant rate for 6 days into rat lateral ventricles via mini-osmotic pumps. Individual rats were then subjected to 30 min of inescapable electric footshock in a chamber with a grid floor. Twenty-four hours later, the rat was again placed in the chamber and observed for 5 min without shocks. This study showed that CCKB receptor antisense significantly suppressed intracellular Ca(2+) concentration in GH3 cells and significantly reduced freezing behavior in rats, indicating that the CCKB receptor plays an important role in anxiety.
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Affiliation(s)
- T Tsutsumi
- Department of Neuropsychiatry, Oita Medical University, Oita, Japan
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Tsutsumi T, Nishida H, Noguchi Y, Komatsuzaki A, Kitamura K. Audiological findings in patients with myoclonic epilepsy associated with ragged-red fibres. J Laryngol Otol 2001; 115:777-81. [PMID: 11667986 DOI: 10.1258/0022215011909224] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Sensorineural hearing loss is a common symptom in patients with myoclonic epilepsy associated with ragged-red fibres (MERRF), one of the mitochondrial encephalomyopathies, although the lesion causing hearing loss in such cases remains unknown. Here we describe the audiological features in three MERRF patients, all of whom exhibited a point mutation in their mitochondrial DNA at nucleotide 8344. Pure-tone threshold audiometry revealed bilateral, sloping-type, sensorineural hearing loss in all three patients. Distortion product otoacoustic emissions, electrocochleography, and auditory brainstem responses were variable, even differing between the right and left ears of the same patient. Taken together, our findings suggest that the primary lesion underlying hearing loss in MERRF patients is in the cochlea, although a retrocochlear lesion may be involved in some patients.
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Affiliation(s)
- T Tsutsumi
- Department of Otolaryngology, School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
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36
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Hori T, Nakagawa R, Tobiishi K, Iida T, Tsutsumi T, Sasaki K, Toyoda M. Effects of cooking on concentrations of polychlorinated dibenzo-p-dioxins and related compounds in green leafy vegetable 'Komatsuna'. Shokuhin Eiseigaku Zasshi 2001; 42:339-42. [PMID: 11775361 DOI: 10.3358/shokueishi.42.339] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The effects of ordinary household cooking processes on concentrations of polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and dioxin-like polychlorinated biphenyls (PCBs) (dioxins) were investigated in 'komatsuna', a green leafy vegetable popular in Japan. The concentrations of dioxins were compared using isomer-specific analyses of both uncooked and cooked edible parts of the plant. The mean total 2,3,7,8-chlorine substituted PCDD and PCDF concentrations were reduced from 46.53 pg/g and 0.714 pg/g to 8.301 pg/g and 0.210 pg/g by washing with tap water, and further reduced to 6.054 pg/g and 0.148 pg/g by subsequent boiling, respectively. The cooking processes markedly decreased the concentrations of PCDD/Fs, while having little effect on those of dioxin-like PCBs. The mean total concentration as 2,3,7,8-tetraCDD equivalents (TEQ) was reduced from 0.058 pgTEQ/g to 0.026 pgTEQ/g by washing with tap water and further reduced to 0.019 pgTEQ/g by subsequent boiling. These results suggest that ordinary cooking processes provide a means of reducing the level of dioxins in green leafy vegetables.
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Affiliation(s)
- T Hori
- Fukuoka Institute of Health and Environmental Sciences: 39, Mukaizano, Dazaifu-shi, Fukuoka 818-0135, Japan
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37
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Yotsuyanagi H, Yasuda K, Moriya K, Shintani Y, Fujie H, Tsutsumi T, Nojiri N, Juji T, Hoshino H, Shimoda K, Hino K, Kimura S, Iino S, Koike K. Frequent presence of HBV in the sera of HBsAg-negative, anti-HBc-positive blood donors. Transfusion 2001; 41:1093-9. [PMID: 11552064 DOI: 10.1046/j.1537-2995.2001.41091093.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Recent studies have revealed that HBV may not be cleared even after the disappearance of serum HBsAg. The purpose of this study was to investigate whether the replication of HBV persists in HBsAg-negative blood donors who lack apparent liver disease. STUDY DESIGN AND METHODS Serum HBV was examined by using PCR coupled with Southern blotting in 50 blood donors who were identified to be HBsAg negative but anti-HBc positive. RESULTS HBV DNA was detected in the sera from 19 (38%) of 50 donors. In 11 of the 19, HBV existed exclusively as immune complexes, while HBV presumably did not exist as immune complexes in the remaining eight. The levels of HBV DNA were similar to those in patients who had recovered from acute HBV. Some nucleotide substitutions, which did not confer amino acid changes in the major epitope of HBsAg, were found in the preS-S regions. CONCLUSION The replication of HBV is ongoing in a substantial proportion of healthy blood donors who have anti-HBc. Blood from such donors may contain very low levels of HBV free of immune complex formation and should be excluded for transfusion. The fact that such blood donors apparently lacked liver disease suggests no pathogenicity of such "occult" HBV.
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Affiliation(s)
- H Yotsuyanagi
- Department of Internal Medicine, University of Tokyo, Japan.
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38
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Nagao T, Nagai S, Kitaichi M, Hayashi M, Shigematsu M, Tsutsumi T, Satake N, Izumi T. Usual interstitial pneumonia: idiopathic pulmonary fibrosis versus collagen vascular diseases. Respiration 2001; 68:151-9. [PMID: 11287829 DOI: 10.1159/000050485] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Bronchoalveolar lavage fluid (BALF) lymphocytosis was found in patients with usual interstitial pneumonia (UIP) associated with collagen vascular diseases (CVD) other than diffuse systemic sclerosis (SSc), but it was not found in patients with idiopathic pulmonary fibrosis (IPF), a disease histologically diagnosed as UIP. This difference could be partly due to variations of UIP spectrums between IPF and interstitial pneumonia associated with CVD. METHODS We scored histopathological findings of lung specimens obtained from 31 cases (16 IPF, 9 CVD other than SSc and 6 SSc) using a semiquantitative scoring method. All cases were diagnosed as UIP by surgical lung biopsy. None of the patients were current smokers. RESULTS Compared with IPF and SSc cases, CVD patients without SSc presented decreased scores of fibrosis (p < 0.01) and alveolar space cellularity (severity, p < 0.05). Lymphocytes were mainly localized in the alveolar walls and the majority of cells in the alveolar spaces were macrophages. On the other hand, other scores such as cellularity and alveolar wall cell infiltrate did not vary among these three groups. CONCLUSION Fewer macrophages in the alveolar spaces and a decrease in the degree of fibrosis may contribute to BALF lymphocytosis more in patients with UIP/CVD non-SSc than in patients with IPF/UIP and UIP-SSc.
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Affiliation(s)
- T Nagao
- Department of Respiratory Medicine, Graduate School of Medicine, Kyoto University Hospital, Kyoto University, Kyoto, Japan
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39
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Moriya K, Nakagawa K, Santa T, Shintani Y, Fujie H, Miyoshi H, Tsutsumi T, Miyazawa T, Ishibashi K, Horie T, Imai K, Todoroki T, Kimura S, Koike K. Oxidative stress in the absence of inflammation in a mouse model for hepatitis C virus-associated hepatocarcinogenesis. Cancer Res 2001; 61:4365-70. [PMID: 11389061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
The mechanism of hepatocarcinogenesis in hepatitis C virus (HCV) infection is still undefined. One possibility is the involvement of oxidative stress, which can produce genetic mutations as well as gross chromosomal alterations and contribute to cancer development. We recently showed that after a long period, the core protein of HCV induces hepatocellular carcinoma (HCC) in transgenic mice with marked hepatic steatosis but without inflammation, indicating a direct involvement of HCV in hepatocarcinogenesis. To elucidate the biochemical events before the development of HCC, we examined several parameters of oxidative stress and redox homeostasis in a mouse model of HCV-associated HCC. For young mice ages 3-12 months, there was no significant difference in the levels of hydroperoxides of phosphatidylcholine (PCOOH) and phosphatidylethanolamine in liver tissue homogenates between transgenic and nontransgenic control mice. In contrast, the PCOOH level was increased by 180% in old core gene transgenic mice > 16 months old. Concurrently, there was a significant increase in the catalase activity, and there were decreases in the levels of total and reduced glutathione in the same mice. A direct in situ determination by chemiluminescence revealed an increase in hydroperoxide products by 170% even in young transgenic mice, suggesting that hydroperoxides were overproduced but immediately removed by an activated scavenger system in young mice. Electron microscopy revealed lipofuscin granules, secondary lysosomes carrying various cytoplasmic organelles, and disruption of the double membrane structure of mitochondria, and PCR analysis disclosed a deletion in mitochondrial DNA. Interestingly, alcohol caused a marked increase in the PCOOH level in transgenic mice, suggesting synergism between alcohol and HCV in hepatocarcinogenesis. The HCV core protein thus alters the oxidant/antioxidant state in the liver in the absence of inflammation and may thereby contribute to or facilitate, at least in part, the development of HCC in HCV infection.
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MESH Headings
- Animals
- Catalase/metabolism
- DNA Damage
- DNA, Mitochondrial/metabolism
- Glutathione/metabolism
- Hepacivirus/genetics
- Hepacivirus/metabolism
- Hepatitis C, Chronic/complications
- Hepatitis C, Chronic/metabolism
- Hepatitis C, Chronic/virology
- Hydrogen Peroxide/metabolism
- Inflammation/metabolism
- Inflammation/virology
- Lipid Peroxidation
- Liver/metabolism
- Liver Neoplasms, Experimental/metabolism
- Liver Neoplasms, Experimental/pathology
- Liver Neoplasms, Experimental/virology
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Transgenic
- Mitochondria, Liver/metabolism
- Mitochondria, Liver/pathology
- Oxidative Stress
- Reactive Oxygen Species/metabolism
- Viral Core Proteins/biosynthesis
- Viral Core Proteins/genetics
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Affiliation(s)
- K Moriya
- Department of Internal Medicine, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
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40
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Tsutsumi T, Komatsuzaki A, Noguchi Y, Tokano H, Kitamura K. Postoperative vestibular-evoked myogenic potentials in cases with vestibular schwannomas. Acta Otolaryngol 2001; 121:490-3. [PMID: 11508510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Although still the subject of discussion, vestibular-evoked myogenic potentials (VEMPs) have been considered to reflect the function of the saccular and, more recently, the cochlear tracts. To accurately determine the precise afferent pathway carrying VEMPs, we studied the outcomes of VEMPs and other examinations in patients with unilateral vestibular schwannomas. Eleven patients with unilateral vestibular schwannomas resected using a middle cranial fossa approach were included in the study. Patients underwent pure-tone threshold audiometry, caloric tests and analysis of auditory brainstem responses (ABRs) and VEMPs pre- and postoperatively. The results were compared with those obtained in patients with intact superior or inferior vestibular and cochlear nerves. Among the 11 patients studied, 4 retained their VEMPs postoperatively. Three of the 10 patients with inferior vestibular schwannomas exhibited normal VEMPs, preserved hearing levels (20 dB HL) and anatomically intact superior vestibular nerves. In all of these cases, ABRs more closely correlated with VEMPs than with caloric responses. In one of the cases with inferior vestibular schwannomas, VEMPs were preserved postoperatively and VEMP latencies were shortened, which indicates the preoperative presence of a conduction block in either the cochlear or superior vestibular nerve. VEMPs may be conducted in both the superior vestibular and cochlear nerves, as well as in the inferior vestibular nerve. Thus, evaluation of saccular nerve function should be performed carefully, especially in cases where hearing is preserved. It appears that cochlear conduction may proceed along two pathways, one direct and the other via the brainstem, but this remains to be verified.
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Affiliation(s)
- T Tsutsumi
- Department of Otolaryngology, Tokyo Medical and Dental University School of Medicine, Japan.
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41
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Abstract
Recently, mutations in the beta-catenin gene in hepatocellular carcinoma (HCC) have been reported: approximately 20% of HCCs had activating mutations at the glycogen synthase kinase 3beta phosphorylation sites within the exon 3 of the beta-catenin gene. However, changes in the level of the beta-catenin protein in HCC have not been well studied. We examined, by Western blotting, the expression level of the beta-catenin protein in cancerous tissues in comparison with that in adjacent non-cancerous tissues obtained from 32 cases of HCC with hepatitis C. An increase in the beta-catenin protein level in cancerous tissue compared to that in adjacent non-cancerous tissue was found in 15 (46.9%) of 32 cases of HCC. Mutation in exon 3 of the beta-catenin gene was found in six (18.8%) of the 32 cases, in five of which the beta-catenin protein level was increased. In total, beta-catenin aberration was found in 16 (50.0%) of 32 cases of HCC. It should be noted that beta-catenin aberration was also found in early HCC although it was observed chiefly in advanced HCCs. These results indicate that beta-catenin aberration is a frequent event in the development of HCC and may facilitate the development of HCC in the course of chronic hepatitis.
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Affiliation(s)
- H Fujie
- Department of Internal Medicine, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8655, Tokyo, Japan
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42
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Uchimura M, Tsutsumi T, Kikutani T, Inaba S, Saitou N. [Restoration of the habit of routine tooth brushing teeth in patients with severe dementia]. Nihon Ronen Igakkai Zasshi 2001; 38:366-71. [PMID: 11431892 DOI: 10.3143/geriatrics.38.366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Purpose-related activities are often lost in severe dementia, including oral hygiene habits such as brushing teeth. The aim of this study is to investigate whether patients with severe dementia can be induced to develop an oral hygiene routine through an occupational therapy approach and whether routine training in oral hygiene habits can reduce dental or denture plaque. Six female inpatients in the same room, who had been given diagnosis of multiple cerebral infarction and dementia. The project design included 4 periods a, b1, b2, and c, a and c were observation periods, while b1 and b2 were general approach periods. In the approach periods we held meetings, and made the program for oral hygiene, planning and problem-solving. In the b2 period both direct intervention by the dentists, dental hygienists and occupational therapists reinforced the habit of brushing teeth in subjects and educated care approach guidance. No patient completely resumed routine habit of brushing teeth, but an improvement in brushings was found in four subjects, one case had no change, and in one case brushing deteriorated. The state of oral hygiene showed improvement in periods b1 and b2. Although the adherence of dental plaque decreased in period b2, it increased in period c. Despite the improvement in performance, sufficient improvement in oral disease prophylaxis was not recognized, suggesting the necessity of professional oral health care by dental staff, and of a disciplinary team approach.
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Affiliation(s)
- M Uchimura
- Department of Geriatric Dentistry, Nippon Dental University School of Dentistry
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43
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Moriya K, Todoroki T, Tsutsumi T, Fujie H, Shintani Y, Miyoshi H, Ishibashi K, Takayama T, Makuuchi M, Watanabe K, Miyamura T, Kimura S, Koike K. Increase in the concentration of carbon 18 monounsaturated fatty acids in the liver with hepatitis C: analysis in transgenic mice and humans. Biochem Biophys Res Commun 2001; 281:1207-12. [PMID: 11243863 DOI: 10.1006/bbrc.2001.4523] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Steatosis is one of the histologic characteristics of chronic hepatitis C and is well reproduced in a transgenic mouse model for hepatocellular carcinoma (HCC) in which the core protein of hepatitis C virus (HCV) plays a pivotal role in inducing steatosis and HCC. In the present study, the lipid composition in the liver of the HCV core gene transgenic mice as well as in those of chronic hepatitis C patients was determined. The concentration of carbon 18 monounsaturated (C18:1) fatty acids, such as oleic and vaccenic acids, which are known to increase membrane fluidity leading to higher cell division rates, significantly increased in the livers of transgenic mice compared to nontransgenic control mice. The concentration of C18:1 fatty acids also significantly increased in the livers of chronic hepatitis C patients compared to subjects without HCV infection. These results suggest that HCV may affect a specific pathway in the lipid metabolism and cause steatosis in the liver.
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Affiliation(s)
- K Moriya
- Department of Internal Medicine, University of Tokyo, Tokyo, Japan
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44
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Sugimoto T, Tsutsumi T, Noguchi Y, Tsunoda A, Kitamura K, Komatsuzaki A. Relationship between cystic change and rotatory vertigo in patients with acoustic neuroma. Acta Otolaryngol Suppl 2001; 542:9-12. [PMID: 10897392 DOI: 10.1080/000164800454585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Acoustic neuromas are benign neoplasms that most often arise from the vestibular nerve. Many patients with this tumor experience some degree of vestibular symptoms. However, patients rarely complain of rotatory vertigo. Acoustic neuromas are known to exhibit a cystic appearance in some patients. It was hypothesized that cystic change might be a causative factor for rotatory vertigo. A retrospective study of 178 patients with unilateral acoustic neuroma who underwent surgery in the Department of Otolaryngology at Tokyo Medical and Dental University was carried out. The cystic appearance of the tumors was detected preoperatively by magnetic resonance imaging and confirmed at surgery. The relationship between cystic change of the tumor and presentation with rotatory vertigo was examined. Of the 178 patients studied, only 10 had both cystic change of the tumor and rotatory vertigo, and 120 had neither cystic tumor nor rotatory vertigo. Of the remaining 48 patients, 24 experienced rotatory vertigo with negative findings for cystic tumor and the other 24 had evidence of cystic tumor but no rotatory vertigo. Tumor with cystic change was observed in 34 patients, accounting for 19.1% of all patients studied. Rotatory vertigo was also experienced in 34 patients (19.1%). Of the 34 patients with cystic lesions, 29.4% (10) had rotatory vertigo. The difference in percentage of the two groups did not reach statistical significance. It is suggested that there may be other factors causing rotatory vertigo in patients with acoustic neuromas than cystic change of the tumor.
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Affiliation(s)
- T Sugimoto
- Department of Otolaryngology, Tokyo Medical and Dental University, Japan.
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45
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Ishii M, Hashino K, Eto G, Tsutsumi T, Himeno W, Sugahara Y, Muta H, Furui J, Akagi T, Ito Y, Kato H. Quantitative assessment of severity of ventricular septal defect by three-dimensional reconstruction of color Doppler-imaged vena contracta and flow convergence region. Circulation 2001; 103:664-9. [PMID: 11156877 DOI: 10.1161/01.cir.103.5.664] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The aim of the present study was to investigate the feasibility and potential value of the computer-controlled, 3D, echocardiographic reconstruction of the color Doppler-imaged vena contracta (CDVC) and the flow convergence (FC) region as a means of accurately and quantitatively estimating the severity of a ventricular septal defect (VSD). METHODS AND RESULTS We performed a 3D reconstruction of the CDVC and the FC region in 19 patients with an isolated VSD using an ultrasound system interfaced with a Tomtec computer. The variable asymmetric geometry of the CDVC and the FC region could be 3D-visualized in all patients. The 3D-measured areas of CDVC correlated well with volumetric measurements of the severity of VSD (r=0.97, P:<0.001). Regression analysis between the shunt flow rate (calculated from the product of the area of CDVC and the continuous Doppler-derived velocity time integral) and the corresponding reference results (calculated by cardiac catheterization) demonstrated a close correlation (r=0.95, P:<0.001). There was also a good correlation between shunt flow rates calculated using the conventional 2D, 1-axis measurement of the FC isovelocity surface area with the hemispheric assumption (r=0.95, P:<0.001); shunt flow rates calculated using 3D, 3-axis measurements of the FC region (r=0.97, P:<0.01); and reference results by cardiac catheterization. However, the 2D method substantially underestimated the actual shunt flow rate. CONCLUSIONS The 3D reconstruction of the CDVC and the FC region may aid in quantifying the severity of VSD.
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Affiliation(s)
- M Ishii
- Department of Pediatrics and the Cardiovascular Research Institute, Kurume University School of Medicine, Kurume, Japan.
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46
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Abstract
We have proposed a new recovery system of hexavalent chromium Cr(VI) that is of great toxicity utilizing condensed-tannin gels derived from a natural polymer with many polyhydroxyphenyl groups. The adsorption mechanism of Cr(VI) to the tannin molecules was clarified. The adsorption mechanism consists of four reaction steps; the esterification of chromate with tannin molecules, the reduction of Cr(VI) to trivalent chromium Cr(III), the formation of carboxyl group by the oxidation of tannin molecules and the ion exchange of the reduced Cr(III) with the carboxyl and hydroxyl groups. It was found in this recovery system that a large amount of proton was consumed accompanied with the reduction of Cr(VI) so that the acidic solution containing Cr(VI) was transferred automatically to neutral one by choosing an appropriate initial pH. The carboxyl group which was created by the oxidation of tannin molecules parallel to the reduction of Cr(VI) to Cr(III) contributed to an increase in the ion-exchange sites of the reduced Cr(III). The maximum adsorption capacity of Cr(VI) reached 287 mg Cr/g dry tannin gel under the conditions of 0.77 water content of tannin gel and the initial pH = 2. This adsorption capacity was five to ten times higher than that obtained by the ion exchange between ordinary Cr(III) and tannin molecules for the tannin gels prepared under similar conditions. The system proposed here will provide an important information on a zero-emission-oriented process because it has such advantages as higher adsorption capacity of chromium and lower volume of secondary wastes compared with conventional process.
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Affiliation(s)
- Y Nakano
- Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Nagatsuta, Midori-ku, Yokohama 226-8502, Japan.
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47
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Ishii M, Tsutsumi T, Himeno W, Eto G, Furui J, Hashino K, Sugahara Y, Muta H, Akagi T, Ando A, Eguchi H, Kato H. Sequential evaluation of left ventricular myocardial performance in children after anthracycline therapy. Am J Cardiol 2000; 86:1279-81, A9. [PMID: 11090811 DOI: 10.1016/s0002-9149(00)01222-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
This study prospectively assessed subclinical cardiotoxicity in patients undergoing chemotherapy by using the Tei index combining systolic and diastolic time intervals. A significant difference in the Tei index was observed between patients who received a low dose and those who received a moderate to high dose of anthracycline antibiotic drugs. The Tei index is a sensitive, accurate, and easy approach for detecting subclinical anthracycline cardiotoxicity.
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Affiliation(s)
- M Ishii
- Department of Pediatrics and the Cardiovascular Research Institute, Kurume University School of Medicine, Japan.
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48
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Yamamoto Y, Akiyoshi J, Kiyota A, Katsuragi S, Tsutsumi T, Isogawa K, Nagayama H. Increased anxiety behavior in OLETF rats without cholecystokinin-A receptor. Brain Res Bull 2000; 53:789-92. [PMID: 11179844 DOI: 10.1016/s0361-9230(00)00407-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Cholecystokinin (CCK) may have a role in the mediation of human panic disorder and anxiogenic (anxiolytic)-like activity in an animal model of anxiety. Otsuka Long Evans Tokushima Fatty (OLETF) rats lacked CCK A receptors (CCKAR) because of a genetic abnormality. In order to elucidate the involvement of CCKAR in the regulation of anxiety, we investigated the exploratory behavior on elevated plus-maze test, the black and white box test, and open field test with OLETF rats in comparison with normal [Long-Evans Tokushima Otsuka (LETO)] rats. And OLETF rats increased the number of stretched attend postures and decreased open arm entry and the % time of open arm in an elevated plus-maze test. Time spent in the white box decreased significantly in OLETF rats than LETO rats. The total line crossing decreased significantly in OLETF rats compared to LETO rats. The missing CCKAR had a significant anxiogenic-like effect. These data support the involvement of the CCKAR in the neurobiological mechanism of anxiety.
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Affiliation(s)
- Y Yamamoto
- Department of Neuropsychiatry, Oita Medical University, Hasama-Machi, Oita, Japan
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49
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Ishii M, Eto G, Tei C, Tsutsumi T, Hashino K, Sugahara Y, Himeno W, Muta H, Furui J, Akagi T, Fukiyama R, Toyoda O, Kato H. Quantitation of the global right ventricular function in children with normal heart and congenital heart disease: a right ventricular myocardial performance index. Pediatr Cardiol 2000; 21:416-21. [PMID: 10982698 DOI: 10.1007/s002460010100] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Although the assessment of right ventricular (RV) function is important in the clinical management of children with congenital heart disease, available imaging techniques have been limited because of the complex geometry of the right ventricle. A new Doppler index combining systolic and diastolic time intervals (the Tei index) has been reported to be useful for the assessment of global RV function in adults. However, normal values in children, age-related changes, and the clinical utility of the Tei index with regard to congenital heart disease have not been demonstrated. The purpose of this study was to prospectively assess RV function in children with normal heart and congenital heart disease using the Tei index. The subjects included 150 healthy children and 43 patients with congenital heart disease (35 patients with atrial septal defects and 8 patients who had had a Senning operation). The index was defined as the sum of isovolumetric contraction time and isovolumetric relaxation time divided by ejection time and was measured from conventional RV outflow and inflow Doppler velocity profiles. The Tei index was not affected by age in healthy children (0.24 +/- 0.04). There was a significant difference in index rating between patients who had had a Senning operation (0.58 +/- 0.09) and healthy children (p < 0.01), but there was no significant difference between children with atrial septal defect (0.25 +/- 0.13) and healthy children. The Tei index is a feasible approach to use when assessing global RV function in children with congenital heart disease.
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MESH Headings
- Adolescent
- Child
- Child, Preschool
- Echocardiography, Doppler, Color/methods
- Echocardiography, Doppler, Pulsed/methods
- Heart Defects, Congenital/diagnostic imaging
- Heart Defects, Congenital/physiopathology
- Heart Function Tests
- Heart Septal Defects, Atrial/diagnostic imaging
- Heart Septal Defects, Atrial/physiopathology
- Humans
- Infant
- Least-Squares Analysis
- Prospective Studies
- Reference Values
- Ventricular Function, Right
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Affiliation(s)
- M Ishii
- Department of Pediatrics, Kurume University School of Medicine, The Cardiovascular Research Institute, Kurume University, Japan
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Tsutsumi T, Tsunoda A, Noguchi Y, Komatsuzaki A. Prediction of the nerves of origin of vestibular schwannomas with vestibular evoked myogenic potentials. Am J Otol 2000; 21:712-5. [PMID: 10993464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
OBJECTIVE To determine whether the nerves of origin of vestibular schwannomas can be predicted using vestibular evoked myogenic potentials (VEMPs). STUDY DESIGN The study was a retrospective analysis. SETTING The ear, nose, and throat department of Tokyo Medical and Dental University. PATIENTS Twenty-eight patients undergoing removal of vestibular schwannomas were included in the study. INTERVENTIONS Patients underwent pure tone audiometry, VEMP testing, caloric testing, and magnetic resonance imaging preoperatively. Hearing level, caloric weakness, maximum tumor size, and the nerves of origin of tumors were compared with VEMP testing. MAIN OUTCOME MEASURE Results of VEMP testing. RESULTS Comparisons between VEMPs and results of the other three examinations revealed no correlations. Complete disappearance of VEMPs was observed only in patients with tumors arising from inferior vestibular nerves. Patients in whom hearing was preserved tended to have preserved VEMPs. Some patients showed damaged hearing and normal VEMP results, although with inferior vestibular schwannomas. A patient with a tumor arising from a cochlear nerve exhibited preservation of VEMP, preserved caloric response, and moderate hearing loss. CONCLUSIONS Inferior vestibular nerve function and hearing level were reflected in VEMP results. Prediction of the nerve of origin of a tumor was possible only in certain restricted cases.
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Affiliation(s)
- T Tsutsumi
- Department of Otolaryngology, School of Medicine, Tokyo Medical and Dental University, Japan
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