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Hata Y, Murakami M, Okabe S. Glycoconjugates with NeuAc-NeuAc-Gal-Glc are more effective at preventing adhesion of Helicobacter pylori to gastric epithelial cells than glycoconjugates with NeuAc-Gal-Glc. JOURNAL OF PHYSIOLOGY AND PHARMACOLOGY : AN OFFICIAL JOURNAL OF THE POLISH PHYSIOLOGICAL SOCIETY 2004; 55:607-25. [PMID: 15381831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/21/2004] [Accepted: 08/02/2004] [Indexed: 04/30/2023]
Abstract
Helicobacter pylori (H. pylori) adheres to human gastric epithelial cells, eliciting various gastroduodenal diseases. Gangliosides play a critical role in bacterial adhesion to cell surfaces. The present study examined how residues of gangliosides are important for inhibition of adhesion of H. pylori to MKN-45 cells. We measured adhesion or detachment effects of gangliosides on the interaction between MKN-45 cells and H. pylori, as well as interleukin-8 production. Among the gangliosides, O-Ac-GD3, GT(1b), GD(1a), GD(1b), GT(1a), and GD3 had potent dose dependent inhibitory effects on adhesion of H. pylori to MKN-45 cells, interleukin-8 production, and vacuole formation induced by H. pylori toxin binding to Vero cells. GD3 also accelerated bacterial detachment of MKN-45 cells with adherent H. pylori in a dose dependent manner. Such results strongly suggest that the mechanism involved in the inhibition of H. pylori adhesion is mediated by the variations of the residues of the NeuAc-NeuAc-Gal-Glc chain of gangliosides. NeuAc-NeuAc-Gal-Glc exhibits a more inhibitory effect on adhesion than the NeuAc-Gal-Glc chain. Such gangioside and oligosaccrharide sequences appear to have therapeutic importance for prevention of H. pylori adhesion, as well as reduction of both inflammation and gastric mucosal injuries.
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Miyazaki M, Kubo M, Kiyohara Y, Okubo K, Nakamura H, Fujisawa K, Hata Y, Tokunaga S, Iida M, Nose Y, Ishibashi T. Comparison of diagnostic methods for diabetes mellitus based on prevalence of retinopathy in a Japanese population: the Hisayama Study. Diabetologia 2004; 47:1411-5. [PMID: 15309291 DOI: 10.1007/s00125-004-1466-8] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2004] [Accepted: 04/15/2004] [Indexed: 12/19/2022]
Abstract
AIMS/HYPOTHESIS The aims of this study were to compare the ability of tests measuring fasting plasma glucose, 2-h plasma glucose and HbA1c levels in predicting specific diabetic retinopathy, and to determine the cut-off level of each measurement for diagnosing diabetes in a Japanese population. METHODS In a total of 1637 subjects, fasting plasma glucose, 2-h plasma glucose and HbA1c levels were measured in a 75-g oral glucose tolerance test, and diabetic retinopathy was assessed by ophthalmic examination. We calculated receiver operating characteristic (ROC) curves as well as the prevalence of diabetic retinopathy by deciles of the distribution of these glycaemic measurements. RESULTS Of the subjects, 37 (2.3%) had diabetic retinopathy. The prevalence of retinopathy dramatically increased in the tenth decile of each variable. Analysis with ROC curves showed that the optimal cut-off levels for diagnosis of diabetes were 6.4 mmol/l for fasting plasma glucose, 11.1 mmol/l for 2-h plasma glucose, and 5.7% for HbA1c. The sensitivities for the cut-off point of the three measurements were identical (86.5%), and the specificities were similar (fasting plasma glucose 87.3%; 2-h plasma glucose 89.6%; HbA1c 90.1%). The area under the ROC curve for 2-h plasma glucose (96.1%) was slightly but not significantly larger than that for fasting plasma glucose (90.0%) and that for HbA1c (94.5%). CONCLUSIONS/INTERPRETATION . Our findings suggest that measuring fasting plasma glucose or HbA1c is just as useful as measuring 2-h plasma glucose for the diagnosis of diabetes, and that the cut-off point for diagnostic fasting plasma glucose level is lower than that of the current diagnostic criteria.
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Sakamoto T, Enaida H, Kubota T, Nakahara M, Yamakiri K, Yamashita T, Yokoyama M, Hata Y, Murata T, Miyata K, Uemura A, Kimura W, Ishibashi T. Incidence of acute endophthalmitis after triamcinolone-assisted pars plana vitrectomy. Am J Ophthalmol 2004; 138:137-8. [PMID: 15234294 DOI: 10.1016/j.ajo.2004.02.072] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/24/2004] [Indexed: 10/26/2022]
Abstract
PURPOSE To report the incidence of acute endophthalmitis after triamcinolone acetonide-assisted pars plana vitrectomy (PPV). DESIGN A retrospective multicenter interventional case series collected over 23 months. METHODS We retrospectively reviewed the charts of all patients who underwent triamcinolone-assisted PPV at seven academic clinical centers or eye hospitals from January 2002 to November 2003. RESULTS Of a total of 1,886 cases, only 1 case showed acute endophthalmitis due to Staphylococcus epidermidis (0.053%). No other cases showed any signs of postoperative endophthalmitis. CONCLUSION Intraoperative use of triamcinolone during PPV is not a high risk factor for acute endophthalmitis.
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Noda Y, Hata Y, Hisatomi T, Nakamura Y, Hirayama K, Miura M, Nakao S, Fujisawa K, Sakamoto T, Ishibashi T. Functional Properties of Hyalocytes under PDGF-Rich Conditions. ACTA ACUST UNITED AC 2004; 45:2107-14. [PMID: 15223783 DOI: 10.1167/iovs.03-1092] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
PURPOSE To investigate the functional properties and intracellular signaling of hyalocytes under platelet-derived growth factor (PDGF)-rich conditions. METHODS The hyalocytes were isolated from bovine eyes and identified by immunocytochemistry and electron microscope. The expression of PDGF receptor alpha/beta and its phosphorylation in response to PDGF-BB was analyzed by Western blot analysis. PDGF-BB-induced proliferation and migration were evaluated by thymidine uptake and Boyden's chemotaxis assay. The expression of the urokinase-type plasminogen activator (uPA) gene and the fibrinolytic activity were assessed by Northern blotting and fibrin zymography. An in vitro type I collagen gel contraction assay was performed to determine the effect of PDGF-BB on cellular contraction. RESULTS The hyalocytes were immunocytochemically positive for S-100 and negative for glial fibrillary acidic protein (GFAP) and cytokeratin, as previously described. The electron microscope demonstrated that hyalocytes possess lysosome-like granules, mitochondria, and micropinocytotic vesicles in their cytoplasm. The hyalocytes expressed PDGF receptor alpha and beta, both of which were immediately phosphorylated in response to PDGF-BB. PDGF-BB also activated p85 PI3-kinase, p44/p42 mitogen-activated protein (MAP) kinase and p38 MAP kinase. PDGF-BB induced thymidine uptake and migration in a concentration-dependent (0-10 ng/mL) manner. Inhibitors of the respective kinases prohibited PDGF-BB-dependent thymidine uptake and migration with the exception of the p44/p42 MAP kinase inhibitor, which displayed no inhibitory effects on migration. PDGF-BB increased uPA gene expression and fibrinolytic activity. Collagen gel contraction observed under PDGF-BB-rich conditions was not prohibited by the respective inhibitors investigated. CONCLUSIONS The hyalocytes demonstrated macrophage-like characteristics and may have both physiologic and pathologic roles, such as the maintenance of vitreous transparency through fibrinolytic activity and the pathogenesis of proliferative-vitreoretinal diseases through cellular proliferation and vitreous hyper-contraction.
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Sassa Y, Hata Y, Aiello LP, Taniguchi Y, Kohno K, Ishibashi T. Bifunctional properties of peroxisome proliferator-activated receptor gamma1 in KDR gene regulation mediated via interaction with both Sp1 and Sp3. Diabetes 2004; 53:1222-9. [PMID: 15111490 DOI: 10.2337/diabetes.53.5.1222] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Vascular endothelial growth factor receptor 2 (KDR) plays a critical role in mediating a variety of vasculogenic and angiogenic processes, including diabetic retinopathy. We previously demonstrated that the promoter activity of the KDR gene in retinal capillary endothelial cells (RCECs) was regulated in part by the relative concentration of positive/negative transcription factors Sp1/Sp3. We also reported that the peroxisome proliferator-activated receptor (PPAR)gamma ligand could inhibit intraocular angiogenesis. In the present study, the role of PPARgamma1 in KDR gene regulation in RCECs was examined. PPARgamma1 protein physically interacted with both Sp1 and Sp3. Transactivation and electrophoretic mobility shift assays clearly demonstrated novel findings that PPARgamma1 increased KDR promoter activity by enhancing the interaction between Sp1, but not Sp3, and KDR promoter region without its ligand in RCECs. The ligand-binding site but not the DNA binding site of PPARgamma1 enhanced the interaction between Sp1 and KDR promoter region. Conversely, PPARgamma1 ligand 15-deoxy Delta (12,14)-prostaglandin J2 dose-dependently suppressed the binding of KDR promoter region with both Sp1 and Sp3, resulting an inhibition of KDR gene expression. In conclusion, PPARgamma1 has bifunctional properties in the regulation of KDR gene expression mediated via interaction with both Sp1 and Sp3.
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Enaida H, Hata Y, Ueno A, Nakamura T, Hisatomi T, Miyazaki M, Fujisawa K, Sakamoto T, Ishibashi T. Possible Benefits of Triamcinolone-Assisted Pars Plana Vitrectomy for Retinal Diseases. Retina 2003; 23:764-70. [PMID: 14707824 DOI: 10.1097/00006982-200312000-00003] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE To study the advantages and complications of triamcinolone acetonide (TA)-assisted pars plana vitrectomy (PPV) for various retinal diseases. METHODS This report is an interventional case series and nonrandomized study. One hundred seventy-seven eyes from 158 patients underwent PPV with or without TA. Group TA(+) consisted of 94 eyes and group TA(-) consisted of 83 eyes. The improvement in vision and postoperative complications were prospectively studied. RESULTS Sixty-two percent of the eyes in group TA(+) and 49% of the eyes in group TA(-) had improved vision after surgery (P = 0.34). Twelve eyes in group TA(+) and 12 eyes in group TA(-) had an intraocular pressure higher than 21 mmHg after the operation, with no statistically significant difference (P = 0.63). Four eyes with proliferative diabetic retinopathy in group TA(+) and five eyes with proliferative diabetic retinopathy in group TA(-) needed an additional filtering surgery. Group TA(+) (five eyes) had a lower incidence (P = 0.041) of reoperation caused by preretinal fibrous membrane formation than group TA(-) (13 eyes). No apparent corneal disorder or infectious signs were found in any eyes. CONCLUSIONS Triamcinolone acetonide-assisted PPV appears to be potentially useful to reduce the incidence of reoperation owing to preretinal fibrosis with no serious complications.
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Takeda A, Hata Y, Shiose S, Sassa Y, Honda M, Fujisawa K, Sakamoto T, Ishibashi T. Suppression of experimental choroidal neovascularization utilizing KDR selective receptor tyrosine kinase inhibitor. Graefes Arch Clin Exp Ophthalmol 2003; 241:765-72. [PMID: 12937991 DOI: 10.1007/s00417-003-0688-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2002] [Revised: 03/31/2003] [Accepted: 04/02/2003] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND We investigated the role of the VEGF-VEGF receptor 2 (KDR) system in the development of choroidal neovascularization (CNV) and its possibility as a therapeutic target utilizing KDR selective receptor tyrosine kinase (RTK) inhibitor (SU5416) both in vitro and in an experimental CNV model. METHODS VEGF-induced phosphorylation of KDR and p44/p42 MAPK in cultured bovine choroidal endothelial cells (BCECs) was determined by Western blot analysis. The proliferation and in vitro tube formation were analyzed by [3H]thymidine uptake and three-dimensional collagen gel model. For experimental CNV model, intense fundus laser photocoagulation was performed on pigmented rats. The anti-angiogenic efficacy of intraperitoneally injected SU5416 on experimental CNV was evaluated by fluorescein angiography and histology. The extent of fluorescein leakage on late-phase angiograms was scored, and the thickness of CNV membrane was histologically measured under a light microscope. RESULTS VEGF-induced KDR phosphorylation in cultured BCECs was inhibited by SU5416 in a dose-dependent manner (0-3 microM) with IC50 of 0.29 +/- 0.071 microM. SU5416 treatment also resulted in a dose-dependent prohibition of VEGF-induced p44/p42 MAPK phosphorylation, [3H]thymidine uptake and in vitro tube formation with corresponding concentrations that inhibited KDR phosphorylation. The leakage score on fluorescein angiography for experimental CNV was significantly lower in the SU5416-treated group than in the control group (P<0.01). Histologically, the CNV membranes in the SU5416-treated group were 31.6% thinner than those in the control group (P<0.01). CONCLUSION These results strengthen the evidence for a critical role of the VEGF-KDR system in the development of CNV, indicating that KDR selective inhibitor might be beneficial for the treatment of intraocular angiogenic diseases, including age-related macular degeneration.
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Ichisaka S, Katoh-Semba R, Hata Y, Ohshima M, Kameyama K, Tsumoto T. Activity-dependent change in the protein level of brain-derived neurotrophic factor but no change in other neurotrophins in the visual cortex of young and adult ferrets. Neuroscience 2003; 117:361-71. [PMID: 12614676 DOI: 10.1016/s0306-4522(02)00771-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Neurotrophins are suggested to play a role in activity-dependent plasticity of visual cortex during the critical period of postnatal development. Thus, the concentration of neurotrophins in the cortex is expected to change with development and/or with alteration in neuronal activities. To test this, we measured protein levels of nerve growth factor, brain-derived neurotrophic factor, neurotrophin-3 and neurotrophin-4/5 in visual cortex of young (postnatal day 38-46, at the peak of the critical period) and adult ferrets with two-site enzyme-immunoassay systems. Measurements were carried out also in somatosensory cortex, hippocampus and cerebellum as control. With development the level of brain-derived neurotrophic factor did not significantly change, while those of the other neurotrophins changed in the visual cortex. A blockade of visual inputs for 24 h by an injection of tetrodotoxin into both eyes significantly decreased brain-derived neurotrophic factor protein level in the visual cortex, but not in the other regions in both young and adult ferrets. On the other hand, no significant decrease was seen in the protein level of the other neurotrophins in the visual cortex of young and adult ferrets. A monocular injection of tetrodotoxin in young ferrets resulted in the reduction of brain-derived neurotrophic factor by approximately half that by binocular injection. The degree of the decrease in the contralateral cortex to the injected eye was significantly larger than that in the ipsilateral cortex, reflecting that the contralateral eye is dominantly represented in the cortex in ferrets. Blockade of cortical neuronal activities by a GABA(A) receptor agonist led to a remarkable reduction of brain-derived neurotrophic factor protein in the visual cortex. These results suggest that the level of brain-derived neurotrophic factor protein in visual cortex is regulated by activities of cortical neurons.
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Nagumo A, Ohni M, Kohno Y, Mizukawa S, Akishita M, Hata Y, Toba K. 3P-0732 RLP-cholesterol levels do not change in plasma after intravenous injection of heparin in patients with hypertriglyceridemia. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90951-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Nagumo A, Ohni M, Kohno Y, Mizukawa S, Akishita M, Hata Y, Toba K. 3P-0733 The incidence of midband lipoproteins in PAG disk electrophoresis and metabolic disorders in patients with normolipidemia. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90952-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Iida H, Ohashi I, Kishimoto S, Umeda T, Hata Y. Preoperative assessment of anterolateral thigh flap cutaneous perforators by colour Doppler flowmetry. BRITISH JOURNAL OF PLASTIC SURGERY 2003; 56:21-5. [PMID: 12706145 DOI: 10.1016/s0007-1226(03)00018-3] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An anterolateral thigh flap is very useful in head and neck reconstruction because of its long and large-caliber vascular pedicle, large skin territory and elevation simultaneous with tumour resection. However, the number and locations of cutaneous perforators vary individually, and thus, it is not widely used because flap elevation is often complicated and time-consuming owing to unexpected anatomical variations. To overcome this disadvantage, we assessed the number and locations of cutaneous perforators preoperatively by colour Doppler flowmetry. These data were compared with the intraoperative anatomical findings and their reliability evaluated. A total of 48 cutaneous perforators were found by preoperative colour Doppler flowmetry scanning of 17 anterolateral thigh flaps. All the perforators except two were found intraoperatively. Doppler scanning failed to detect four perforators. Colour Doppler flowmetry assessment therefore has a 92% true-positive rate and a 95.8% positive predictive value. All the flaps except one included multiple perforators, and sufficient blood circulation was observed in all cases. No flaps were unexpectedly changed to anteromedial thigh flaps or contralateral anterolateral thigh flaps because of inappropriate cutaneous perforators or the absence of perforators. Though this investigation is relatively time-consuming (30-40 min) and requires skill, it is very useful for preoperative flap planning and increases the reliability and safety of elevating an anterolateral thigh flap.
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Sassa Y, Hata Y, Murata T, Yamanaka I, Honda M, Hisatomi T, Fujisawa K, Sakamoto T, Kubota T, Nakagawa K, Sueishi K, Ishibashi T. Functional role of Egr-1 mediating VEGF-induced tissue factor expression in the retinal capillary endothelium. Graefes Arch Clin Exp Ophthalmol 2002; 240:1003-10. [PMID: 12483323 DOI: 10.1007/s00417-002-0576-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2002] [Revised: 09/17/2002] [Accepted: 09/18/2002] [Indexed: 11/26/2022] Open
Abstract
PURPOSE To investigate the causal relationship between VEGF and tissue factor (TF) expression, and its intracellular signaling in the retinal capillary endothelium both in vitro and in vivo. METHODS TF mRNA and protein expression in cultured bovine retinal capillary endothelial cells (BRECs) were detected by RT-PCR and western blotting. The expression and subcellular localization of Egr-1 were analyzed by immunocytochemistry and western blotting. Involvement of p44/p42 MAPK pathway in this signaling was assessed using PD98059. Electrophoretic mobility shift assay (EMSA) was performed using human TF Egr-1/Sp-1 overlapping promoter region (-85 to -70). Decoy oligonucleotide was transfected into BRECs to clarify the critical transcription factor mediating VEGF-induced TF gene expression. To evaluate the importance of GC rich region in VEGF-induced TF protein expression in rat retinas, Mithramycin was intraperitoneally administered. RESULTS VEGF stimulated TF mRNA and protein expression in cultured BRECs, reaching maximal effect after 4 h and 10 h, respectively. VEGF activated transcription factor Egr-1 within 60 min. Inactivation of Egr-1 by PD98059 resulted in the prohibition of VEGF-induced TF gene expression. EMSA revealed the increment of Egr-1 binding with TF promoter region by displacing Sp1 after treatment with VEGF. Transfection of the Egr-1/Sp-1 overlapping decoy into BRECs inhibited VEGF-dependent TF gene expression. Mithramycin almost completely suppressed VEGF-induced TF protein expression in retinal capillary system in vivo (80%, p<0.01). CONCLUSION Transcription factor Egr-1, which lies downstream of p44/p42 MAPK, critically mediates VEGF-dependent TF expression in the retinal capillary endothelium.
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Hata Y, Ishibashi T. [Chronic complications due to diabetes mellitus: Pathology of diabetic retinopathy]. NIHON RINSHO. JAPANESE JOURNAL OF CLINICAL MEDICINE 2002; 60 Suppl 10:155-61. [PMID: 12430222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
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Mochiku T, Hata Y, Mihara Y, Nakano Y, Fujii H, Suzuki J, Kakeya I, Kadowaki K, Hirata K, Kito H, Ihara H. Crystal structure and superconducting properties of Sr2YCu2(Fe,Co)O6+δ. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302091316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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115
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Fujii T, Sakai H, Kawata Y, Hata Y. Crystal structure of thermostable aspartase and exploration of functional sites in aspartase family. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302089031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Hata Y, Fujii T, Hayashida M, Aso Y, Ishiguro M. Crystal structures of three lectins from the roots of pokeweed. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302096678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Uchida H, Hata Y, Matsuura S, Morotomi Y, Aoyama H. An evaluation of use of information technology equipment among Japanese elderly women--relation between health status and the preferred input device for the Internet. Asia Pac J Public Health 2002; 13 Suppl:S47-50. [PMID: 12109249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
This study was conducted to determine how mobile phones (MP) and the Internet through personal computers (IPC) have been used among Japanese elderly women. It also aims to examine the relationship between the input devices and factors such as age, health status, and future needs for a MP and the IPC. The magnitude of the relation was evaluated by the odds ratio (OR). The survey was done in December 2000 and January 2001. The study sample was forty women, 78.5 +/- 4.5 years of age (70-89), who lived in their own houses in Y Town near Himeji City, Hyogo, Japan. Findings reveal that use of a MP was 10.0% and none used the IPC. On the other hand, 60.0% of the subjects were interested in using a MP in the future and 27.5% in using the IPC. The touch screen was the most preferred input device among the elderly with high age [OR = 3.86, 95% confidence interval (CI) 0.83-18.98]. It was also preferred by subjects with more difficulties (OR = 5.00, 95% CI 1.05-25.41) and less future need for a MP and the IPC (OR = 7.22, 95% CI 1.34-43.88). On the other hand, the Japanese kana syllabary (JKS) was the most preferred input device among those with a low age (OR = 4.33, 95% CI 0.68-35.00) and with a more future need for a MP and the IPC (OR = 6.33, 95% CI 1.14-39.59). Considering these results, we intend to create a type of keyboard that combines the features of touch screen and JKS for the elderly women.
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Sasaki F, Matsunaga T, Iwafuchi M, Hayashi Y, Ohkawa H, Ohira M, Okamatsu T, Sugito T, Tsuchida Y, Toyosaka A, Nagahara N, Nishihira H, Hata Y, Uchino J, Misugi K, Ohnuma N. Outcome of hepatoblastoma treated with the JPLT-1 (Japanese Study Group for Pediatric Liver Tumor) Protocol-1: A report from the Japanese Study Group for Pediatric Liver Tumor. J Pediatr Surg 2002; 37:851-6. [PMID: 12037748 DOI: 10.1053/jpsu.2002.32886] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE Hepatoblastoma is the most common malignant liver tumor in childhood. Multicenter studies elucidate the optimal pre- or postoperative chemotherapeutic regimens. This report reviews the results of the Japanese Study Group for Pediatric Liver Tumor Protocol-1 (JPLT-1) and compares its outcomes with published reports of other studies. METHODS From March 1991 to December 1999, 154 patients with malignant liver tumor including 145 cases of hepatoblastomas were enrolled in the JPLT study. Data from 134 cases were analyzed in this study. JPLT-1 protocol 91A was used for patients with stage I or II hepatoblastoma. The chemotherapy regimen consisted of repeated courses of cisplatin (CDDP), 40 mg/m(2), and tetrahydropyranyl (THP)-Adriamycin, 30 mg/m(2). JPLT-1 protocol 91B was administered to patients with stage IIIA, IIIB, or IV hepatoblastoma. The chemotherapy regimen consisted of repeated courses of CDDP, 80 mg/m(2), and THP-Adriamycin, 30 mg/m(2)/day for 2 days. Courses were repeated every 4 weeks as tolerated. RESULTS Seven patients died of chemotherapy-related side effects. Six of them died of sepsis caused by leukopenia and 1 case of liver failure. Overall survival rate (3-year/6-year) was 100%/100% for stage I (n = 9), 100%/95.7% for stage II (n = 32), 76.6%/73.8% for stage IIIA (n = 48), 50.3%/50.3% for stage IIIB (n = 25), 64.8%/38.9% for stage IV (n = 20), and 77.8%/73.4% overall. For stage IIIA and B disease, intravenous chemotherapy was better than intraarterial chemotherapy (66.4% v 38.1% for event-free survival and 69.3% v. 57.1% for overall survival). Patients less than 1 year of age had a better prognosis than older patients, but age was not a significant prognostic factor by multivariate analysis. CONCLUSIONS The overall and event-free survival rates of the JPLT-1 study of hepatoblastoma were comparable with the results of other multicenter studies in Europe and the United States. The event-free survival rate at 3 years for stage IIIB and IV disease was under 50%. New treatment strategies are needed for patients with advanced hepatoblastoma.
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Seki H, Saitoh S, Hata Y, Murakami N, Shimizu T, Takaoka K. Callus resection for brachial plexus compression following stress-induced first rib fracture. JOURNAL OF HAND SURGERY (EDINBURGH, SCOTLAND) 2002; 27:293-5. [PMID: 12074622 DOI: 10.1054/jhsb.2002.0753] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A 27-year-old man presented with a lower trunk brachial plexus injury due to excessive callus formation following a stress-induced first rib fracture. The callus, but not the first rib, was resected through a supraclavicular approach. His symptoms resolved in 2 months, and no recurrence was seen at 2 years follow-up.
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Zhang X, Sakamoto T, Hata Y, Kubota T, Hisatomi T, Murata T, Ishibashi T, Inomata H. Expression of matrix metalloproteinases and their inhibitors in experimental retinal ischemia-reperfusion injury in rats. Exp Eye Res 2002; 74:577-84. [PMID: 12076079 DOI: 10.1006/exer.2001.1152] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Matrix metalloproteinases (MMPs) are endopeptidases that degrade the extracellular matrix (ECM) and are involved in the pathogenesis of retinal degeneration along with tissue inhibitors of metalloproteinases (TIMPs). The present study examined the expression and activation of two specific members of MMPs (MMP-2 and MMP-9) and their related inhibitors (TIMP-1 and TIMP-2) in an experimental retinal ischemia-reperfusion injury. Retinal ischemia-reperfusion injury (RIRI) was induced in adult rats with a ligation method. After one hour of ischemia and a varied reperfusion time (0, 3, 6, 12, 24, 48 and 76 hr), the rat eyes were enucleated. Retinal extracts underwent zymographic analysis to measure the activity of MMP-2/9. The activity of TIMP-1 and TIMP-2 was measured by reverse zymography. The protein level was examined by Western blot. Immunohistochemistry analysis was undertaken to assess the anatomical distribution of MMP-9 in the retina after RIRI. The gelatinolytic activity of ProMMP-2 (72 kDa) was increased markedly at 6 hr after RIRI. ProMMP-9 (92 kDa) was not detected in the control specimens, while it appeared at 3 hr, increased markedly at 6 hr, and reached maximal levels at 24 hr after RIRI. The gelatinolytic activity found ian retinal extracts was shown to be inhibited by 10 m M EDTA and activated in vitro by a known metalloproteinase activator (4-aminophenylmercuric acetate (APMA)), indicating that these enzymes were of the metalloproteinase class. By western blot, MMP-2/9 levels increased parallel to protein activity level in zymography. No corresponding increase in TIMP-1 and TIMP-2 protein activity and protein level was detected by reverse zymography and western blot. Elevated levels of MMP-9 and its distribution in retina were confirmed by immunohistochemistry. Expression of MMP-9 was detected in the inner and outer segments of rat retina, and the level becomes stronger at 24 hr after RIRI. In this study, ProMMP-2 and ProMMP-9 were expressed and increased significantly, but their inhibitors (TIMP-1 and TIMP-2) remained relatively unaltered in ischemic retina after RIRI in rats. These results suggest that MMP-2 and MMP-9 may play an important role in the pathomechanism of retinal ischemic injury.
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Hata Y, Watanabe M. Fragmentation reaction of ylides. III. New synthetic route for exomethylenes. J Am Chem Soc 2002. [DOI: 10.1021/ja00806a044] [Citation(s) in RCA: 14] [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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Hata Y, Muratani H, Kimura Y, Fukiyama K, Kawano Y, Ashida T, Yokouchi M, Imai Y, Ozawa T, Fujii J, Omae T. Office blood pressure variability as a predictor of acute myocardial infarction in elderly patients receiving antihypertensive therapy. J Hum Hypertens 2002. [PMID: 11850772 DOI: 10.1038/sj/jhh/1001301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Larger variability of office blood pressure (BP) was reportedly associated with a higher risk of stroke or mortality from all causes. In the present study, we focused on the relationship of variability of office BP and occurrence of acute myocardial infarction (MI). We registered 139 patients receiving antihypertensive therapy for more than 1 year who experienced first-ever episode of MI at the age of 60 years or over. At least two sex- and age-matched (+/- 5 years) control patients were registered for every MI patient. Average systolic and diastolic BP during the 12-month period prior to the occurrence of MI, or the time of registration in the case of control patients, was similar in both patient groups. The office BP variability was evaluated by calculating the variation coefficient (VC) of BP. VC of diastolic BP was significantly higher in the MI patients (10.0 +/- 4.0%) compared with the control patients (8.8 +/- 3.4%). VC of systolic BP was not different between the MI and the control patients. Multiple logistic analysis revealed the relationship of the VC for office diastolic BP to the occurrence of MI was significant after adjustment for BP level, age, gender, body mass index, serum total cholesterol concentrations, diabetes mellitus, and current smoking. In conclusion, larger long-term variability of office diastolic BP during antihypertensive therapy is a predictor of MI.
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Hisatomi T, Sakamoto T, Goto Y, Yamanaka I, Oshima Y, Hata Y, Ishibashi T, Inomata H, Susin SA, Kroemer G. Critical role of photoreceptor apoptosis in functional damage after retinal detachment. Curr Eye Res 2002; 24:161-72. [PMID: 12221523 DOI: 10.1076/ceyr.24.3.161.8305] [Citation(s) in RCA: 108] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
PURPOSE Although apoptosis is assumed to play a pivotal role in retinal function loss, its mechanism and real influence on retinal function are still unclear. To investigate the relation between retinal function and apoptosis, we studied photoreceptor apoptosis in experimental retinal detachment (RD). METHODS We induced RD by subretinal injection of sodium hyaluronate in Brown Norway rats. Apoptotic photoreceptors were detected by TdT-dUTP Terminal Nick-End Labeling (TUNEL). To evaluate the function of the detached retina, electroretinograms (ERGs) were taken on day 1, 3 with corneal electrodes and full-field stimulation. RESULTS Apoptotic DNA fragmentation appeared 12 hours after RD, was most prominent on day 3, and decreased thereafter. The ERGs showed that the amplitudes of dark-adapted a-waves and light adapted 2 Hz b-waves decreased immediately after RD and continued to decrease over time. The administration of Fas/Fc chimera recombinant protein or a caspase inhibitor, Z-VAD.fmk, failed to prevent either photoreceptor apoptosis or retinal functional damage. In contrast, brain derived neurotrophic factor (BDNF) and basic fibroblast growth factor (bFGF) significantly impeded both apoptosis and dysfunction. The ERGs recognized the functional changes sensitively, and these ERG changes correlated well to the amount of photoreceptor apoptosis. Immunohistochemical study showed that apoptosis-inducing factor (AIF), a novel caspase-independent apoptotic factor, was relocalized from mitochondria to the nucleus in this process. CONCLUSIONS The present results showed that apoptosis was a key phenomenon in the retinal dysfunction in RD and that this process was transmitted mainly by mitochondria-dependent pathways rather than Fas/Fas-L or downstream caspase dependent pathways.
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Abstract
In reviewing the trends and influences of life-style in this country on health and disease in the latter half of 20th century, we focused our attention on 4 major habits of smoking, drinking, exercise and diets, and collected data on the Japanese to conduct a meta-analysis of their relationship with serum lipids and lipoproteins, which are the metabolic risk factors most closely related to atherosclerosis. 1) The percentage of smokers was 54.0% in adult males and 14.5% in adult females in 1999. In the data of 7,256 subjects (mean age 47 years) in 16 papers, smoking increased triglycerides by 13 mg/dl (0.15 mmol/L) or in 559 non-drinkers with a mean age of 49 years in 3 papers by 18 mg/dl (0.20 mmol/L), and decreased HDL-cholesterol by 3.5 mg/dl (0.09 mmol/L) with every 20 cigarettes smoked according to the regression equation. 2) As for drinking, the annual ethanol consumption per adult was 8.5L in 1996. The effects of alcohol on serum lipids were analyzed in 27,035 males (mean age 47 years) in 24 studies. Drinking elevated triglycerides by a mean of 10 mg/dl (0.11 mmol/L), and also HDL-cholesterol by 2.5 mg/dl (0.06 mmol/L) per 23 g of alcohol intake (corresponding to 1 go of sake or 1 large bottle of beer). 3) Concerning exercise habit, 25% of males and 21% of females (mean age 47 years) regularly performed exercise such as jogging, swimming, aerobics, and tennis. However, walking was regarded as an easy exercise to be practiced by subjects of all ages. The effects of walking on serum lipids were studied in a total of 46,074 subjects (mean age 47 years) in 8 populations. Triglycerides were significantly lower by 10 mg/dl (0.11 mol/L), and HDL-cholesterol higher by 3 mg/dl (0.08 mmol/L) in those who walked 6,000 or more steps/day than in those who walked less than 2,000 steps/day. The effects of harder exercise like jogging or swimming were analyzed in 2,242 subjects in 14 papers (mean age 44 years). Triglycerides decreased by 10 mg/dl (0.11 mmol/L), and HDL-cholesterol elevated by 5 mg/dl (0.13 mmol/L) with an increase in the exercise intensity by one level of about 300 kcal. In exercise therapy, triglycerides were decreased by a mean of 20 mg/dl (0.23 mmol/L), and HDL cholesterol increased by a mean of 10 mg/dl (0.26 mmol/L) by exercise at a mean heart rate of about 135 bpm, which is equivalent to 50% VO2max for 30 minutes x 3 times/week. 4) In nutritional trends, the mean energy intake in 52 postwar years averaged 2,116+/-84 kcal with no marked changes according to nutritional surveys. However, the percentage of fat in total energy intake was lowest at 7% in 1946, increased thereafter until it exceeded 20% in 1973, and surpassed 25% in 1988. The mean total cholesterol level of the Japanese increased by 28 mg/dl (0.72 mmol/L) in the past 30 years and reached 204 mg/dl (5.28 mmol/L) in a survey in 1990. 5) Concerning dietary habits, total cholesterol was lower by a mean of 13 mg/dl (0.34 mmol/L), triglycerides lower by 40 mg/dl (0.45 mmol/L), and HDL-cholesterol higher by 5 mg/dl (0.13 mmol/L) in the group who ate 7 or more Japanese-style meals in the 9 meals during 3 days than in the group who ate 3 or less Japanese-style meals in the 9 meals. When serum lipids were compared among individuals living in cities (8 groups; 3,613 subjects; mean age 51 years), agricultural villages (13 groups; 5,364 subjects; mean age 51 years), and fishing villages (9 groups; 1,071 subjects; mean age 52 years). Total cholesterol was lower by a mean of 10 mg/dl (0.26 mmol/L) in fishing villages than in cities, and triglycerides lower by a mean of 15 mg/dl (0.17 mmol/L) in fishing villages than in cities and agricultural villages. HDL-cholesterol was 5 mg/dl (0.13 mmol/L) higher in agricultural villages and 3 mg/dl (0.08 mmol/L) higher in fishing villages than in cities. 6) The effects of dietary therapy or guidance were evaluated in 585 subjects (mean age, 53 years) in 12 papers. Total cholesterol was reduced by 20 mg/dl (0.52 mmol/L), triglycerides by a mean of 40 mg/dl (0.45 mmol/L), and HDL-cholesterol was increased by 5 mg/dl (0.13 mmol/L) by restriction of fat intake or restriction of the intake of saturated fat and dietary cholesterol. The results of these meta-analyses are considered to indicate the extent to which abnormalities of serum lipids are caused by a distorted life-style and the extent to which they are improved by correction of the life-style and exercise or dietary therapy. Correction of the life-style as a non-drug therapy may clearly improve hyperlipidemias or hypo-HDL-cholesterolemia so that this approach should be aggressively employed as part of the prevention and treatment for hyperlipidemias.
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Sugiura M, Hata Y, Fukuda T, Ishizaki S, Hanyaku H, Naka W, Harada T, Nishikawa T. [One-week application of terbinafine cream compared with four-week application in treatment of Tinea pedis]. NIHON ISHINKIN GAKKAI ZASSHI = JAPANESE JOURNAL OF MEDICAL MYCOLOGY 2002; 42:223-8. [PMID: 11704752 DOI: 10.3314/jjmm.42.223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The possibility of one-week application of terbinafine cream for tinea pedis was studied in a double-blind test at four institutes, comparing four-week application as a control. Of a total of forty-three patients studied, nineteen were randomized into a four-week application group, Group I, and twenty into a one-week application group, Group II. Group I was evaluated as moderate to extremely useful in twelve (63.2%) of the nineteen patients and Group II in twelve (60.0%) of the twenty patients. No statistical differences were observed between two groups. These findings appeared to indicate that the short term, one-week application of terbinafine cream had results equivalent to the four-week application. This short-term treatment which aids in improving patient compliance and reducing the total amount of drug applied, thus lowering drug cost, is viewed as a useful way of treating tinea pedis.
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