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Miyasaka M, Tanaka R, Hirabayashi K, Yamazaki A, Shinohara H, Taira H, Akamatsu T. Primary mucinous carcinoma of the skin: a case of metastasis after 10 years of disease-free interval. EUROPEAN JOURNAL OF PLASTIC SURGERY 2008; 32:189-193. [PMID: 20234869 PMCID: PMC2837212 DOI: 10.1007/s00238-008-0304-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2008] [Accepted: 10/14/2008] [Indexed: 11/24/2022]
Abstract
Primary mucinous carcinoma of the skin (MCS) is a rare neoplasm. Clinically, it has a high local recurrence rate, but it is known to be a slow-growing benign tumor with a rare incidence of distant metastases. We present a case of primary MCS on the jaw that underwent tumor resection twice and was disease-free for 10 years after the second surgery. The patient had no evidence of local recurrence and distant metastasis until his 11th year follow-up. At that time, he was diagnosed with lung and bone metastasis and died 3 years after this. To our knowledge, this is the first case of MCS that presented with metastasis with more than 10-year disease-free interval. Since MCS is a slow-growing asymptomatic tumor, distant metastasis is difficult to diagnose without detailed radiological examination. We believe that computed tomography and resonance imaging should be performed for early diagnosis of metastasis even for cases with long-term disease-free interval, especially cases of local recurrence.
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Shimizu Y, Murakami F, Ogawa N, Yamazaki A, Ishiya T, Sakurai S, Hasumi K, Umezawa S. Prognostic significance of systematic pelvic and paraaortic lymphadenectomy (SLA) in apparent stage I epithelial ovarian carcinoma (EOC). J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.16502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Murakami F, Ogawa N, Yamazaki A, Yamada M, Ishiya T, Katase K, Hasumi K, Umezawa S, Shimizu Y. Cisplatin-based combination chemotherapy consisting of ifomide, epirubicin, and cisplatin (IEP) is effective for patients with relapsed ovarian carcinoma (ROC) resistant or refractory to TC (paclitaxel/carboplatin). J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.16507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Muto T, Yamazaki A, Takeda S, Sato Y. Effect of bilateral sagittal split ramus osteotomy setback on the soft palate and pharyngeal airway space. Int J Oral Maxillofac Surg 2008; 37:419-23. [DOI: 10.1016/j.ijom.2007.12.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2006] [Revised: 11/29/2007] [Accepted: 12/17/2007] [Indexed: 10/22/2022]
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Uchiyama A, Yamazaki A, Matsuse K, Kobayashi E. Broadband shortwave calibration results for East Asian Regional Experiment 2005. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jd008110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Naruse Y, Koide M, Yamazaki A, Watanabe K, Matsuo T, Sugiura T, Miyata H, Saito N, Uchiyama R, Yamashita S, Tokuda M. [Mitral valve plasty for a 91-year-old woman with mitral valve prolapse]. KYOBU GEKA. THE JAPANESE JOURNAL OF THORACIC SURGERY 2007; 60:551-4. [PMID: 17642216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
We reported a successful mitral valve plasty for a 91-year-old woman with mitral valve prolapse. She has lived healthfully and independently without a big problem. She was admitted to another hospital for acute heart failure. Echo cardiography revealed prolapse of posterior mitral valve leaflet and severe mitral regurgitation. Drug therapy was not enough to control her complaint In spite of her age, the patient was able to support herself, and she and her family desired to have a surgical treatment. Therefore she referred to our hospital and underwent mitral valve plasty. Post operative course was almost uneventful. She discharged the hospital 3 months after the operation. If a selective criteria for individual patients is applied, the nonagenarian can safety undergo cardiac surgery.
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Fujita T, Nakamura K, Yamazaki A, Ozaki M, Sahashi K, Shichijo K, Nomura K, Maeda M, Nakamura T, Fujita T, Yokota S, Kuroyama S, Kumagai Y, Majima M, Ohtani Y. Effect of l-phenylalanine supplementation and a high-protein diet on pharmacokinetics of cefdinir in healthy volunteers: an exploratory study. J Clin Pharm Ther 2007; 32:277-85. [PMID: 17489880 DOI: 10.1111/j.1365-2710.2007.00826.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Upregulation of oligopeptide transport activity by dietary protein, certain dipeptides and amino acids has been reported in the rat intestine and a human intestinal cell line. OBJECTIVE In this study, the pharmacokinetics of cefdinir were investigated after L-phenylalanine supplementation and a high-protein diet (HPD) in humans to explore changes in the activities of intestinal and renal oligopeptide transporters. METHODS A normal-protein diet (NPD, 73.2 +/- 2.6 g/day), NPD + l-phenylalanine (7.5 g/day), or HPD (141.3 +/- 3.7 g/day) was given to six male healthy volunteers for 12 days followed by a single dose of cefdinir after an overnight fast in a randomized three-way crossover study with a 22-day washout. Blood and urine were collected over a 12-h period after administration of cefdinir. Concentrations of cefdinir in plasma and/or urine were measured by high-performance liquid chromatography. RESULTS Plasma concentrations and urinary excretion of the drug did not change throughout the study. Physiological variables and laboratory values did not reveal any differences between the three periods except for serum and urinary nitrogen levels and serum triglyceride. DISCUSSION A reason for the unchanged pharmacokinetics of cefdinir may be due to lower doses of L-phenylalanine and protein in humans than in animals when converting animal effective doses to humans. CONCLUSION In humans, L-phenylalanine supplementation and HPD do not seem to upregulate intestinal and renal oligopeptide transport in the ranges of duration and dose examined.
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Suematsu H, Nishimura S, Murai K, Hayashi Y, Suzuki T, Nakayama T, Jiang W, Yamazaki A, Seki K, Niihara K. Pulsed wire discharge apparatus for mass production of copper nanopowders. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2007; 78:056105. [PMID: 17552867 DOI: 10.1063/1.2721419] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
A pulsed wire discharge (PWD) apparatus for the mass production of nanopowders has been developed. The apparatus has a continuous wire feeder, which is operated in synchronization with a discharging circuit. The apparatus is designed for operation at a maximum repetition rate of 1.4 Hz at a stored energy of 160 J. In the present study, Cu nanopowder was synthesized using the PWD apparatus and the performance of the apparatus was examined. Cu nanopowder of 2.0 g quantity was prepared in N(2) gas at 100 kPa for 90 s. The particle size distribution of the Cu nanopowder was analyzed by transmission electron microscopy and the mean surface diameter was determined to be 65 nm. The ratio of the production mass of the powder to input energy was 362 g/kW h.
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Yamazaki A, Kumagai Y, Fujita T, Hasunuma T, Yokota S, Maeda M, Otani Y, Majima M. Different effects of light food on pharmacokinetics and pharmacodynamics of three benzodiazepines, quazepam, nitrazepam and diazepam. J Clin Pharm Ther 2007; 32:31-9. [PMID: 17286787 DOI: 10.1111/j.1365-2710.2007.00795.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Quazepam, nitrazepam and diazepam are administered under fed or fasted conditions for insomnia or anxiety disorder. Light bedtime food may have clinically relevant effects on the plasma levels of those drugs and hence on psychomotor performance. This study assessed the effect of light food on the pharmacokinetics and pharmacodynamics of these drugs. METHOD Twenty-one eligible subjects were randomized to one of three groups of seven subjects: quazepam 20 mg, diazepam 5 mg or nitrazepam 5 mg. Each healthy subject took a single oral dose of the assigned drug after overnight fasting and after light food, on a separate occasion. Blood samples were collected until 72 h after dosing. The plasma samples were assayed using high-pressure liquid chromatography with spectrophotometric detection. Reaction time, critical flicker fusion test and visual analogue scales were conducted. RESULTS The peak plasma concentration (C(max)) and area under the concentration-time curve (AUC) of quazepam with light food were 1.2-fold [90% confidence interval (CI): 1.1-1.5; P < 0.05] and 1.5-fold (90% CI: 1.3-1.9; P < 0.05) higher than that without light food, respectively. For nitrazepam and diazepam, the time to peak was delayed about 1 h in fed condition (P > 0.05). However it had no effect on their C(max) and AUC. Reaction time of quazepam with light food was prolonged at 4 and 6 h after dosing and its area under the effect-time curve from 0 to 10 h was increased (P < 0.05). CONCLUSION Light food increased the bioavailability of quazepam and affected psychomotor performance. Light food delayed T(max) of nitrazepam and diazepam but had no effect on C(max) and AUC.
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Inukai Y, Ito K, Hara K, Yamazaki A, Takebayashi K, Aso Y, Inukai T. Serum cholesteryl ester transfer protein concentrations are associated with serum levels of total cholesterol, beta-lipoprotein and apoproteins in patients with type 2 diabetes mellitus. Med Princ Pract 2007; 16:367-72. [PMID: 17709925 DOI: 10.1159/000104810] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2006] [Accepted: 01/06/2007] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To investigate the role of serum cholesterol ester transfer protein (CETP) and the metabolism of various lipids including apoproteins in patients with type 2 diabetes. MATERIALS AND METHODS The relationships between serum concentrations of CETP and various lipids and apoproteins were investigated in 193 patients with type 2 diabetes mellitus and 68 age-matched healthy subjects. Serum CETP concentrations were measured by an enzyme-linked immunosorbent assay. RESULTS Serum CETP values were lower in diabetic patients than in healthy controls (p < 0.01). Female diabetic patients had significantly higher CETP concentrations than male patients. Serum CETP concentrations exhibited a significant positive correlation with serum concentrations of cholesterol (TC) and beta-lipoproteins in diabetic patients (r = 0.485, p = 0.013). Patients with relatively high serum concentrations of high-density lipoprotein cholesterol (HDL-C) tended to have much lower CETP concentrations than patients with lower HDL-C concentrations. Serum CETP concentrations showed significant positive correlations with those of apoproteins B (Apo B; r = 0.384, p = 0.024) and E (Apo E; r = 0.341, p = 0.035). CONCLUSION The data indicate that serum CETP is closely involved in the metabolism of TC, beta-lipoprotein, Apo B and Apo E in type 2 diabetic patients.
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Muto T, Yamazaki A, Takeda S, Kawakami J, Tsuji Y, Shibata T, Mizoguchi I. Relationship between the pharyngeal airway space and craniofacial morphology, taking into account head posture. Int J Oral Maxillofac Surg 2006; 35:132-6. [PMID: 15961280 DOI: 10.1016/j.ijom.2005.04.022] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2003] [Revised: 03/15/2005] [Accepted: 04/20/2005] [Indexed: 10/25/2022]
Abstract
This study assessed the relationship between craniofacial characteristics and the size of the pharyngeal airway space (PAS), taking into account head posture. Sixty dental students 25-30 years of age (30 men and 30 women) were examined by lateral cephalometry. The data were corrected with the use of appropriate regression equations for the PAS. The PAS significantly correlated with hyoid position, maxillary and mandibular size, maxillary and mandibular prognathism, and mandibular inclination. A large, anteriorly positioned mandible was associated with a large PAS-TP (the most proximal distance between the posterior pharyngeal wall and the tongue base). Uvula length and PNS-Ba (the distance between the most posterior point of the hard palate and the most inferior point of the anterior foramen magnum) correlated with PAS-UP (the most proximal distance between the posterior pharyngeal wall and uvula). Our results suggest that the anteroposterior dimension of the PAS is substantially affected by the size of the enclosure surrounding the PAS, including the maxilla, mandible and soft palate.
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Hayashi Y, Fukumi A, Matsukado K, Mori M, Kotaki H, Kando M, Chen LM, Daito I, Kondo S, Kanazawa S, Yamazaki A, Ogura K, Nishiuchi M, Kado M, Sagisaka A, Nakamura S, Li Z, Orimo S, Homma T, Daido H. Estimation of photon dose generated by a short pulse high power laser. RADIATION PROTECTION DOSIMETRY 2006; 121:99-107. [PMID: 16410288 DOI: 10.1093/rpd/nci383] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The authors obtain a new equation to estimate the forward component of a photon dose generated through the interaction between a target and a short pulse high power laser. As the equation is quite simple, it is useful for calculating the photon dose. The equation shows that the photon dose is proportional to the electron temperature in the range>3 MeV and proportional to the square of the electron temperature in the range<3 MeV. The dose estimated with this method is roughly consistent with the result of Monte Carlo simulation. With some assumptions and corrections, it can reproduce experimental results obtained and the dose result calculated at other laboratories.
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Qiao WM, Song Y, Yoon SH, Korai Y, Mochida I, Yoshiga S, Fukuda H, Yamazaki A. Carbonization of waste PVC to develop porous carbon material without further activation. WASTE MANAGEMENT (NEW YORK, N.Y.) 2006; 26:592-8. [PMID: 16182519 DOI: 10.1016/j.wasman.2005.06.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2004] [Revised: 05/25/2005] [Accepted: 06/23/2005] [Indexed: 05/04/2023]
Abstract
Efficient removal of chlorine from PVC achieved by two-stage heat-treatment (280 and 410 degrees C) provided chlorine-free isotropic pitch containing additive. The pitch was stabilized and carbonized into porous carbons with surface areas of approximately 300 m2/g. Resultant porous carbons showed three pore structures of supermicropore, micropore and mesopore. The generation of CO2 from the decomposition of the CaCO3 additive in waste PVC is responsible for the development of porous structures. The surface area of the carbonized product increased after the removal of CaO.
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Muto T, Yamazaki A, Takeda S, Tsuji Y, Shibata T. Pharyngeal narrowing as a common feature in pycnodysostosis—a cephalometric study. Int J Oral Maxillofac Surg 2005; 34:680-5. [PMID: 16053895 DOI: 10.1016/j.ijom.2004.10.024] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2004] [Revised: 09/08/2004] [Accepted: 10/29/2004] [Indexed: 11/27/2022]
Abstract
We report on pycnodysostosis presenting as severe snoring caused by pharyngeal narrowing in two siblings. Cephalograms showed pharyngeal narrowing at the level of the soft palate and the base of the tongue caused by the long soft palate and mandibular hypoplasia. From the literature review and our results, we suggest that respiratory insufficiency such as snoring or obstructed sleep apnea are common and under-appreciated symptoms of pycnodysostosis.
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Kando M, Masuda S, Zhidkov A, Yamazaki A, Kotaki H, Kondo S, Homma T, Kanazawa S, Nakajima K, Hayashi Y, Mori M, Kiriyama H, Akahane Y, Inoue N, Ueda H, Nakai Y, Tsuji K, Yamamoto Y, Yamakawa K, Koga J, Hosokai T, Uesaka M, Tajima T. Electron acceleration by a nonlinear wakefield generated by ultrashort (23-fs) high-peak-power laser pulses in plasma. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2005; 71:015403. [PMID: 15697651 DOI: 10.1103/physreve.71.015403] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2004] [Indexed: 05/24/2023]
Abstract
We study experimentally the interaction of the shortest at present (23-fs) , relativistically intense (20-TW), tightly focused laser pulses with underdense plasma. MeV electrons constitute a two-temperature distribution due to different plasma wave-breaking processes at a plasma density of 10(20) cm(-3). These two groups of electrons are shown numerically to constitute bunches with very distinctive time durations.
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Matsukado K, Esirkepov T, Kinoshita K, Daido H, Utsumi T, Li Z, Fukumi A, Hayashi Y, Orimo S, Nishiuchi M, Bulanov SV, Tajima T, Noda A, Iwashita Y, Shirai T, Takeuchi T, Nakamura S, Yamazaki A, Ikegami M, Mihara T, Morita A, Uesaka M, Yoshii K, Watanabe T, Hosokai T, Zhidkov A, Ogata A, Wada Y, Kubota T. Energetic protons from a few-micron metallic foil evaporated by an intense laser pulse. PHYSICAL REVIEW LETTERS 2003; 91:215001. [PMID: 14683311 DOI: 10.1103/physrevlett.91.215001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2003] [Indexed: 05/24/2023]
Abstract
With detailed experimental studies and hydrodynamics and particle-in-cell simulations we investigate the role of the prepulse in laser proton acceleration. The prepulse or pedestal (amplified spontaneous emission) can completely evaporate the irradiated region of a sufficiently thin foil; therefore, the main part of the laser pulse interacts with an underdense plasma. The multiparametric particle-in-cell simulations demonstrate that the main pulse generates the quasistatic magnetic field, which in its turn produces the long-lived charge separation electrostatic field, accelerating the ions.
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Nagai T, Awana V, Takayama-Muromachi E, Yamazaki A, Karppinen M, Yamauchi H, Malik S, Yelon W, Matsui Y. Structural order and disorder in Co-based layered cuprates CoSr2(Y,Ce)sCu2O5+2s (s=1–3). J SOLID STATE CHEM 2003. [DOI: 10.1016/s0022-4596(03)00412-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Miyamoto H, Wang Z, Fukai R, Futagawa T, Anami Y, Yamazaki A, Morio A, Sonobe S, Konno H, Takahashi N, Izumi H, Sakaguchi H, Ikeda S, Hata E. P-704 Evaluation of right cervical and bilateral mediastinal lymph node dissection for NSCLC in the right upper lobe. Lung Cancer 2003. [DOI: 10.1016/s0169-5002(03)92671-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Yoshikawa I, Yamazaki A, Yamashita K, Takizawa Y, Nakamura M. Which is a significant contributor for outside of the plasmapause, an ionospheric filling or a leakage of plasmaspheric materials?: Comparison of He II (304 Å) images. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2002ja009578] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Muto T, Takeda S, Kanazawa M, Yamazaki A, Fujiwara Y, Mizoguchi I. The effect of head posture on the pharyngeal airway space (PAS). Int J Oral Maxillofac Surg 2002; 31:579-83. [PMID: 12521311 DOI: 10.1054/ijom.2002.0279] [Citation(s) in RCA: 130] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The purpose of this study was to investigate the relationship between cranio-cervical inclination and pharyngeal airway space (PAS) by measuring these parameters at different head postures in the same subjects and to obtain a regression equation to correct the values measured. Fifty lateral cephalometric radiographs taken at five different head postures per individual were obtained from ten adults (seven males and three females) aged from 25 to 30 years with nose breathers and Class I occlusion. The changes in cranio-cervical inclination produced by head extension were correlated with changes in the variables describing the PAS. The OPT/NSL (cranio-cervical inclination in the second vertebrae) and C3-Me (distance between the third vertebrae and the Menton) correlated strongly with PAS-TP (the most proximal distance measured between the posterior pharyngeal wall and the tongue base) in the pharyngeal airway space (r = 0.807 and 0.854 respectively). The regression equations were Y = - 27.177+0.39X (Y = PAS-TP, X = OPT/NSL), and Y = -21.105+0.402X (Y = PAS-TP, X = C3-Me), respectively. From these equations we could conclude that an increase of 10 degrees in OPT/NSL or 10 mm in C3-Me increased the pharyngeal airway space (PAS-TP) by about 4 mm.
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Hohdatsu T, Sasagawa T, Yamazaki A, Motokawa K, Kusuhara H, Kaneshima T, Koyama H. CD8+ T cells from feline immunodeficiency virus (FIV) infected cats suppress exogenous FIV replication of their peripheral blood mononuclear cells in vitro. Arch Virol 2002; 147:1517-29. [PMID: 12181672 DOI: 10.1007/s00705-002-0827-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Feline immunodeficiency virus (FIV) isolates from domestic cats have been classified into five subtypes, designated A, B, C, D and E. Although many FIV-infected cats may have frequent contact with multiple strains of FIV, they usually become infected with a single FIV subtype. In the present study, we demonstrate that peripheral blood mononuclear cells (PBMC) of FIV infected cats were resistant to exogenous FIV (second virus) replication in vitro and that the resistance of these PBMC was mediated by CD8+ T cells. In cats with a low anti-FIV activity of CD8+ T cells, the proviral DNA of the second virus inoculated into PBMC was detected intracellularly, and both the second and the originally infecting strain (original virus) were produced in the culture supernatant. In contrast, in cats with a high anti-FIV activity of CD8+ T cells, both the proviral DNA of the second virus and the original virus were detected in PBMC intracellularly, but neither virus was produced in the culture supernatant. However, when PBMCs from these cats were depleted of CD8+ T cells, the RNA of both viruses was detected in the culture supernatant. These results suggest that CD8+ T cells inhibit the late phase of FIV replication after viral integration. Moreover, the inhibition was also effective against FIV strains of different subtypes from that of the original strain. It appears that the CD8+ T cell-mediated immune response plays important roles in the maintenance of an asymptomatic state in FIV-infected cats and their resistance to superinfection.
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Yamazaki A, Sendoh M, Ishiyama K, Hayase T, Arai KI. Analysis of Swimming Properties of Magnetic Micro-machine of 0.5mm in Diameter. ACTA ACUST UNITED AC 2002. [DOI: 10.3379/jmsjmag.26.645] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Hasuwa H, Shishido Y, Yamazaki A, Kobayashi T, Yu X, Mekada E. CD9 amino acids critical for upregulation of diphtheria toxin binding. Biochem Biophys Res Commun 2001; 289:782-90. [PMID: 11735113 DOI: 10.1006/bbrc.2001.6053] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
CD9 associates with a diphtheria toxin receptor (DTR) that is identical to the membrane-anchored form of heparin-binding EGF-like growth factor. We determined the region of CD9 important for upregulation activity. Human and monkey CD9 upregulates DT binding activity of DTR, while mouse CD9 has no upregulation activity. Transfection of chimeric constructs comprising monkey and mouse CD9s showed that the human sequence between Ala156 and Asp183 is essential for the upregulation activity. Studies of mutants, replacing a single amino acid within the region between Ala156 and Asp183 of monkey CD9 with the corresponding amino acid residue in mouse CD9, revealed that substitution of Gly158 is critical for the reduction of the upregulation activity and secondly for the substitution of Val159 and Thr175. These three amino acid residues were deduced to be located on the head domain of the second extracellular loop, suggesting that interactions of CD9 with DTR or DT at the domain containing these three amino acids were important for the upregulation of DT binding.
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Chujoh Y, Matsuo K, Yoshizaki H, Nakasatomi T, Someya K, Okamoto Y, Naganawa S, Haga S, Yoshikura H, Yamazaki A, Yamazaki S, Honda M. Cross-clade neutralizing antibody production against human immunodeficiency virus type 1 clade E and B' strains by recombinant Mycobacterium bovis BCG-based candidate vaccine. Vaccine 2001; 20:797-804. [PMID: 11738743 DOI: 10.1016/s0264-410x(01)00398-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The recombinant Mycobacterium bovis BCG (rBCG) vector-based vaccine secreting the V3 principal neutralizing epitope of human immunodeficiency virus type 1 (HIV-1) Japanese strain was reported to induce both humoral and cellular immune responses effectively [Proc. Natl. Acad. Sci. USA. 92 (1995) 10693]. The antigen-secreting rBCG system was applied to the V3 epitope of clade E HIV-1 in this study. The V3 sequence of 19 amino acids (aa) and 15aa fused with mycobacterial alpha-antigen was not secreted while 12aa and 11aa sequences were successfully secreted from BCG cells. Serum IgG from guinea pig which was immunized with 12aa epitope-secreting recombinant BCG neutralized the WHO reference strain as well as primary field isolates of clade E virus. The serum IgG could also neutralize Thai B (clade B') strains which possessed a conserved GPGQ motif in their V3 sequences. These data suggest that the rBCG construct secreting the 12aa epitope is implicated in the development of a prophylactic vaccine in Thailand in which both clade E and B' viruses are prevalent.
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Nishioka T, Shirato H, Tsuchiya K, Tsukamoto E, Ohomori K, Yamazaki A, Aoyama H, Nishioka S, Miyasaka K. 18FDG-PET/MRI/CT fusion-guided conformal radiotherapy for nasopharyngeal and oropharyngeal carcinomas: a differential dose delivery based on functional imaging. Int J Radiat Oncol Biol Phys 2001. [DOI: 10.1016/s0360-3016(01)01899-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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