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Tominami K, Kudo TA, Noguchi T, Hayashi Y, Luo YR, Tanaka T, Matsushita A, Izumi S, Sato H, Gengyo-Ando K, Matsuzawa A, Hong G, Nakai J. Physical Stimulation Methods Developed for In Vitro Neuronal Differentiation Studies of PC12 Cells: A Comprehensive Review. Int J Mol Sci 2024; 25:772. [PMID: 38255846 PMCID: PMC10815383 DOI: 10.3390/ijms25020772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/04/2024] [Accepted: 01/05/2024] [Indexed: 01/24/2024] Open
Abstract
PC12 cells, which are derived from rat adrenal pheochromocytoma cells, are widely used for the study of neuronal differentiation. NGF induces neuronal differentiation in PC12 cells by activating intracellular pathways via the TrkA receptor, which results in elongated neurites and neuron-like characteristics. Moreover, the differentiation requires both the ERK1/2 and p38 MAPK pathways. In addition to NGF, BMPs can also induce neuronal differentiation in PC12 cells. BMPs are part of the TGF-β cytokine superfamily and activate signaling pathways such as p38 MAPK and Smad. However, the brief lifespan of NGF and BMPs may limit their effectiveness in living organisms. Although PC12 cells are used to study the effects of various physical stimuli on neuronal differentiation, the development of new methods and an understanding of the molecular mechanisms are ongoing. In this comprehensive review, we discuss the induction of neuronal differentiation in PC12 cells without relying on NGF, which is already established for electrical, electromagnetic, and thermal stimulation but poses a challenge for mechanical, ultrasound, and light stimulation. Furthermore, the mechanisms underlying neuronal differentiation induced by physical stimuli remain largely unknown. Elucidating these mechanisms holds promise for developing new methods for neural regeneration and advancing neuroregenerative medical technologies using neural stem cells.
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Affiliation(s)
- Kanako Tominami
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Tada-aki Kudo
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Takuya Noguchi
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Yohei Hayashi
- Cell Resource Center for Biomedical Research, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan
- Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan
| | - You-Ran Luo
- Division for Globalization Initiative, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Takakuni Tanaka
- Division for Globalization Initiative, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Ayumu Matsushita
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Satoshi Izumi
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Hajime Sato
- Division of Pharmacology, Meikai University School of Dentistry, Sakado 350-0283, Japan
| | - Keiko Gengyo-Ando
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Atsushi Matsuzawa
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Guang Hong
- Division for Globalization Initiative, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Junichi Nakai
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
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Luo YR, Kudo TA, Tominami K, Izumi S, Tanaka T, Hayashi Y, Noguchi T, Matsuzawa A, Nakai J, Hong G, Wang H. SP600125 Enhances Temperature-Controlled Repeated Thermal Stimulation-Induced Neurite Outgrowth in PC12-P1F1 Cells. Int J Mol Sci 2022; 23:ijms232415602. [PMID: 36555248 PMCID: PMC9779509 DOI: 10.3390/ijms232415602] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 12/05/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022] Open
Abstract
This study evaluated the mechanism of temperature-controlled repeated thermal stimulation (TRTS)-mediated neuronal differentiation. We assessed the effect of SP600125, a c-Jun N-terminal kinase (JNK) inhibitor, on neuronal differentiation of rat PC12-P1F1 cells, which can differentiate into neuron-like cells by exposure to TRTS or neurotrophic factors, including bone morphogenetic protein (BMP) 4. We evaluated neuritogenesis by incubating the cells under conditions of TRTS and/or SP600125. Cotreatment with SP600125 significantly enhanced TRTS-mediated neuritogenesis, whereas that with other selective mitogen-activated protein kinase (MAPK) inhibitors did not-e.g., extracellular signal-regulated kinase (ERK)1/2 inhibitor U0126, and p38 MAPK inhibitor SB203580. We tried to clarify the mechanism of SP600125 action by testing the effect of U0126 and the BMP receptor inhibitor LDN193189 on the SP600125-mediated enhancement of intracellular signaling. SP600125-enhanced TRTS-induced neuritogenesis was significantly inhibited by U0126 or LDN193189. Gene expression analysis revealed that TRTS significantly increased β3-Tubulin, MKK3, and Smad7 gene expressions. Additionally, Smad6 and Smad7 gene expressions were substantially attenuated through SP600125 co-treatment during TRTS. Therefore, SP600125 may partly enhance TRTS-induced neuritogenesis by attenuating the negative feedback loop of BMP signaling. Further investigation of the mechanisms underlying the effect of SP600125 during TRTS-mediated neuritogenesis may contribute to the future development of regenerative neuromedicine.
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Affiliation(s)
- You-Ran Luo
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
- Division for Globalization Initiative, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Tada-aki Kudo
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
- Correspondence: ; Tel.: +81-22-717-8293
| | - Kanako Tominami
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Satoshi Izumi
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Takakuni Tanaka
- Division for Globalization Initiative, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Yohei Hayashi
- Cell Resource Center for Biomedical Research, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan
- Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan
| | - Takuya Noguchi
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Atsushi Matsuzawa
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Junichi Nakai
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Guang Hong
- Division for Globalization Initiative, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Hang Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
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Yoshida T, Tsujimoto M, Kawakami S, Fujioka H, Irie Y, Nakatani S, Iso A, Sugiyama A, Miyake M, Hirato K, Tanaka R, Oda T, Furukubo T, Izumi S, Yamakawa T, Minegaki T, Nishiguchi K. Research on the relationship between serum indoxyl sulfate concentration and iron dynamics index in patients with end-stage kidney disease: a cross-sectional study. Ren Replace Ther 2022. [DOI: 10.1186/s41100-022-00444-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Background
Chronic kidney disease (CKD) is frequently associated with renal anemia. Erythropoiesis-stimulating agent-hyporesponsive anemia is often caused by iron deficiency in patients with CKD. We hypothesized that high accumulation of indoxyl sulfate, a uremic toxin, accelerates iron deficiency in patients with CKD. The aim of this study was to clarify whether the accumulation of indoxyl sulfate is a cause of iron deficiency in patients with CKD. Therefore, we investigated the association between serum indoxyl sulfate concentration and iron dynamics in patients with end-stage kidney disease (ESKD).
Methods
We performed a cross-sectional study on 37 non-dialyzed patients with ESKD, who were hospitalized to undergo maintenance hemodialysis treatment at Shirasagi Hospital. Serum indoxyl sulfate concentration, iron dynamics parameters and other laboratory data were measured immediately before the initiation of hemodialysis treatment. Clinical characteristics were obtained from electronic medical records.
Results
The estimated glomerular filtration rate (eGFR) of 37 patients with ESKD was 5.08 (3.78–7.97) mL/min/1.73 m2 (median [range]). Serum ferritin and transferrin saturation (TSAT) were 90 (10–419) ng/mL and 20 (8–59)% (median [range]), respectively. Serum indoxyl sulfate concentration was 62 (11–182) μM (median [range]). Serum indoxyl sulfate concentration was inversely correlated with serum ferritin level (ρ = − 0.422, p = 0.011), but not with TSAT, age, gender, eGFR and c-reactive protein (CRP) in 37 patients. In eight patients taking iron-containing agents, serum indoxyl sulfate concentration was strongly correlated with serum ferritin level (ρ = − 0.796, p = 0.037); however, in 29 patients not taking an iron-containing agent, this correlation was not observed (ρ = − 0.336, p = 0.076). In the multivariate analysis including age, gender, eGFR and CRP, the correlation between serum indoxyl sulfate concentration tended to be, but not significantly correlated with serum ferritin level in 37 patients (regression coefficient = − 54.343, p = 0.137).
Conclusion
Our study suggests that serum accumulation of indoxyl sulfate is one of causes not to increase serum ferritin level in patients with ESKD taking an iron-containing agent. Further clinical study is needed to reveal the appreciable relationship between serum ferritin and serum indoxyl sulfate.
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Banzai K, Izumi S. Cis-regulatory elements of the cholinergic gene locus in the silkworm Bombyx mori. Insect Mol Biol 2022; 31:73-84. [PMID: 34549831 DOI: 10.1111/imb.12739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 09/14/2021] [Accepted: 09/17/2021] [Indexed: 06/13/2023]
Abstract
Genes of choline acetyltransferase (ChAT) and vesicular acetylcholine transporter are encoded in the same gene locus, called the cholinergic gene locus. They are essential in cholinergic neurons to maintain their functional phenotype. The genomic structure of the cholinergic gene locus is conserved among invertebrates to mammals. However, the cholinergic gene expression in a specific subset of neurons is unknown in insects except for Drosophila melanogaster. In this study, we analysed the upstream sequence of cholinergic gene locus in the silkworm Bombyx mori to identify specific cis-regulatory regions. We found multiple enhancer regions that are localized within 1 kb upstream of the cholinergic gene locus. The combination of promoter assays using small deletions and bioinformatic analysis among insect species illuminates two conserved sequences in the cis-regulatory region: TGACGTA and CCAAT, which are known as the cAMP response element and CAAT box, respectively. We found that dibutyryl-cAMP, an analogue of cAMP, influences the expression of ChAT in B. mori. Tissue-specific expression analysis of transcriptional factors identified potential candidates that control the cholinergic gene locus expression. Our investigation provides new insight into the regulation mechanism of cholinergic neuron-specific gene machinery in this lepidopteran insect.
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Affiliation(s)
- K Banzai
- Department of Biological Sciences, Kanagawa University, Hiratsuka, Kanagawa, Japan
| | - S Izumi
- Department of Biological Sciences, Kanagawa University, Hiratsuka, Kanagawa, Japan
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Hatano A, Someya M, Tanaka H, Sakakima H, Izumi S, Hoshijima M, Ellisman M, McCulloch AD. Automated 3D reconstruction of isolated mitochondria from cardiomyocyte SBEM images. Biophys J 2022. [DOI: 10.1016/j.bpj.2021.11.1569] [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: 11/02/2022] Open
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6
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Kudo TA, Tominami K, Izumi S, Hayashi Y, Noguchi T, Matsuzawa A, Hong G, Nakai J. Characterization of PC12 Cell Subclones with Different Sensitivities to Programmed Thermal Stimulation. Int J Mol Sci 2020; 21:ijms21218356. [PMID: 33171774 PMCID: PMC7664380 DOI: 10.3390/ijms21218356] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/03/2020] [Accepted: 11/05/2020] [Indexed: 11/16/2022] Open
Abstract
Neuritogenesis is the process underling nervous system regeneration; however, optimal extracellular signals that can promote neuronal regenerative activities require further investigation. Previously, we developed a novel method for inducing neuronal differentiation in rat PC12 cells using temperature-controlled repeated thermal stimulation (TRTS) with a heating plate. Based on neurogenic sensitivity to TRTS, PC12 cells were classified as either hyper- or hyposensitive. In this study, we aimed to investigate the mechanism of hyposensitivity by establishing two PC12-derived subclones according to TRTS sensitivity during differentiation: PC12-P1F1, a hypersensitive subclone, and PC12-P1D10, a hyposensitive subclone. To characterize these subclones, cell size and neuritogenesis were evaluated in subclones treated with nerve growth factor (NGF), bone morphogenetic protein (BMP), or various TRTS. No significant differences in cell size were observed among the parental cells and subclones. BMP4- or TRTS-induced neuritogenesis was increased in PC12-P1F1 cells compared to that in the parental cells, while no neuritogenesis was observed in PC12-P1D10 cells. In contrast, NGF-induced neuritogenesis was observed in all three cell lines. Furthermore, a BMP inhibitor, LDN-193189, considerably inhibited TRTS-induced neuritogenesis. These results suggest that the BMP pathway might be required for TRTS-induced neuritogenesis, demonstrating the useful aspects of these novel subclones for TRTS research.
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Affiliation(s)
- Tada-aki Kudo
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (K.T.); (S.I.); (J.N.)
- Correspondence: ; Tel./Fax: +81-22-717-8293
| | - Kanako Tominami
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (K.T.); (S.I.); (J.N.)
| | - Satoshi Izumi
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (K.T.); (S.I.); (J.N.)
| | - Yohei Hayashi
- Cell Resource Center for Biomedical Research, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan;
- Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan
| | - Takuya Noguchi
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan; (T.N.); (A.M.)
| | - Atsushi Matsuzawa
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan; (T.N.); (A.M.)
| | - Guang Hong
- Division for Globalization Initiative, Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan;
| | - Junichi Nakai
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (K.T.); (S.I.); (J.N.)
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7
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Wells AU, Flaherty KR, Brown KK, Inoue Y, Devaraj A, Richeldi L, Moua T, Crestani B, Wuyts WA, Stowasser S, Quaresma M, Goeldner RG, Schlenker-Herceg R, Kolb M, Aburto M, Acosta O, Andrews C, Antin-Ozerkis D, Arce G, Arias M, Avdeev S, Barczyk A, Bascom R, Bazdyrev E, Beirne P, Belloli E, Bergna M, Bergot E, Bhatt N, Blaas S, Bondue B, Bonella F, Britt E, Buch K, Burk J, Cai H, Cantin A, Castillo Villegas D, Cazaux A, Cerri S, Chaaban S, Chaudhuri N, Cottin V, Crestani B, Criner G, Dahlqvist C, Danoff S, Dematte D'Amico J, Dilling D, Elias P, Ettinger N, Falk J, Fernández Pérez E, Gamez-Dubuis A, Giessel G, Gifford A, Glassberg M, Glazer C, Golden J, Gómez Carrera L, Guiot J, Hallowell R, Hayashi H, Hetzel J, Hirani N, Homik L, Hope-Gill B, Hotchkin D, Ichikado K, Ilkovich M, Inoue Y, Izumi S, Jassem E, Jones L, Jouneau S, Kaner R, Kang J, Kawamura T, Kessler R, Kim Y, Kishi K, Kitamura H, Kolb M, Kondoh Y, Kono C, Koschel D, Kreuter M, Kulkarni T, Kus J, Lebargy F, León Jiménez A, Luo Q, Mageto Y, Maher T, Makino S, Marchand-Adam S, Marquette C, Martinez R, Martínez M, Maturana Rozas R, Miyazaki Y, Moiseev S, Molina-Molina M, Morrison L, Morrow L, Moua T, Nambiar A, Nishioka Y, Nunes H, Okamoto M, Oldham J, Otaola M, Padilla M, Park J, Patel N, Pesci A, Piotrowski W, Pitts L, Poonyagariyagorn H, Prasse A, Quadrelli S, Randerath W, Refini R, Reynaud-Gaubert M, Riviere F, Rodríguez Portal J, Rosas I, Rossman M, Safdar Z, Saito T, Sakamoto N, Salinas Fénero M, Sauleda J, Schmidt S, Scholand M, Schwartz M, Shapera S, Shlobin O, Sigal B, Silva Orellana A, Skowasch D, Song J, Stieglitz S, Stone H, Strek M, Suda T, Sugiura H, Takahashi H, Takaya H, Takeuchi T, Thavarajah K, Tolle L, Tomassetti S, Tomii K, Valenzuela C, Vancheri C, Varone F, Veeraraghavan S, Villar A, Weigt S, Wemeau L, Wuyts W, Xu Z, Yakusevich V, Yamada Y, Yamauchi H, Ziora D. Nintedanib in patients with progressive fibrosing interstitial lung diseases-subgroup analyses by interstitial lung disease diagnosis in the INBUILD trial: a randomised, double-blind, placebo-controlled, parallel-group trial. Lancet Respir Med 2020; 8:453-460. [PMID: 32145830 DOI: 10.1016/s2213-2600(20)30036-9] [Citation(s) in RCA: 263] [Impact Index Per Article: 65.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 01/06/2020] [Accepted: 01/16/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUND The INBUILD trial investigated the efficacy and safety of nintedanib versus placebo in patients with progressive fibrosing interstitial lung diseases (ILDs) other than idiopathic pulmonary fibrosis (IPF). We aimed to establish the effects of nintedanib in subgroups based on ILD diagnosis. METHODS The INBUILD trial was a randomised, double-blind, placebo-controlled, parallel group trial done at 153 sites in 15 countries. Participants had an investigator-diagnosed fibrosing ILD other than IPF, with chest imaging features of fibrosis of more than 10% extent on high resolution CT (HRCT), forced vital capacity (FVC) of 45% or more predicted, and diffusing capacity of the lung for carbon monoxide (DLco) of at least 30% and less than 80% predicted. Participants fulfilled protocol-defined criteria for ILD progression in the 24 months before screening, despite management considered appropriate in clinical practice for the individual ILD. Participants were randomly assigned 1:1 by means of a pseudo-random number generator to receive nintedanib 150 mg twice daily or placebo for at least 52 weeks. Participants, investigators, and other personnel involved in the trial and analysis were masked to treatment assignment until after database lock. In this subgroup analysis, we assessed the rate of decline in FVC (mL/year) over 52 weeks in patients who received at least one dose of nintedanib or placebo in five prespecified subgroups based on the ILD diagnoses documented by the investigators: hypersensitivity pneumonitis, autoimmune ILDs, idiopathic non-specific interstitial pneumonia, unclassifiable idiopathic interstitial pneumonia, and other ILDs. The trial has been completed and is registered with ClinicalTrials.gov, number NCT02999178. FINDINGS Participants were recruited between Feb 23, 2017, and April 27, 2018. Of 663 participants who received at least one dose of nintedanib or placebo, 173 (26%) had chronic hypersensitivity pneumonitis, 170 (26%) an autoimmune ILD, 125 (19%) idiopathic non-specific interstitial pneumonia, 114 (17%) unclassifiable idiopathic interstitial pneumonia, and 81 (12%) other ILDs. The effect of nintedanib versus placebo on reducing the rate of FVC decline (mL/year) was consistent across the five subgroups by ILD diagnosis in the overall population (hypersensitivity pneumonitis 73·1 [95% CI -8·6 to 154·8]; autoimmune ILDs 104·0 [21·1 to 186·9]; idiopathic non-specific interstitial pneumonia 141·6 [46·0 to 237·2]; unclassifiable idiopathic interstitial pneumonia 68·3 [-31·4 to 168·1]; and other ILDs 197·1 [77·6 to 316·7]; p=0·41 for treatment by subgroup by time interaction). Adverse events reported in the subgroups were consistent with those reported in the overall population. INTERPRETATION The INBUILD trial was not designed or powered to provide evidence for a benefit of nintedanib in specific diagnostic subgroups. However, its results suggest that nintedanib reduces the rate of ILD progression, as measured by FVC decline, in patients who have a chronic fibrosing ILD and progressive phenotype, irrespective of the underlying ILD diagnosis. FUNDING Boehringer Ingelheim.
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Affiliation(s)
- Athol U Wells
- National Institute for Health Research Respiratory Biomedical Research Unit, Royal Brompton and Harefield NHS Foundation Trust, London, UK
| | - Kevin R Flaherty
- Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Kevin K Brown
- Department of Medicine, National Jewish Health, Denver, CO, USA
| | - Yoshikazu Inoue
- Clinical Research Center, National Hospital Organization Kinki-Chuo Chest Medical Center, Sakai City, Osaka, Japan
| | - Anand Devaraj
- Department of Radiology, Royal Brompton and Harefield NHS Foundation Trust, London, UK; National Heart and Lung Institute, Imperial College, London, UK
| | - Luca Richeldi
- Fondazione Policlinico A. Gemelli IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Teng Moua
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic Rochester, Rochester, MN, USA
| | - Bruno Crestani
- Université de Paris, Inserm U1152, APHP, Hôpital Bichat, Centre de reference constitutif pour les maladies pulmonaires rares, Paris, France
| | - Wim A Wuyts
- Unit for Interstitial Lung Diseases, Department of Pulmonary Medicine, University Hospitals Leuven, Leuven, Belgium
| | | | - Manuel Quaresma
- Boehringer Ingelheim International, Ingelheim am Rhein, Germany
| | | | | | - Martin Kolb
- McMaster University and St Joseph's Healthcare, Hamilton, Ontario, Canada
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Kakuwa T, Ariga A, Takasaki J, Kato M, Igari T, Shida Y, Okafuji T, Nakamura S, Miyazaki Y, Katano H, Iikura M, Izumi S, Sugiyama H. Mucor pulmonary embolism in a patient with myelodysplastic syndrome. Respir Med Case Rep 2020; 30:101035. [PMID: 32190545 PMCID: PMC7068122 DOI: 10.1016/j.rmcr.2020.101035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 03/02/2020] [Accepted: 03/02/2020] [Indexed: 11/28/2022] Open
Abstract
Mucormycosis is a life-threatening infectious disease that occurs most commonly in immunocompromised patients such as those with hematological malignancies. Its clinical symptoms and associated radiological findings vary and specific biomarkers and culture characteristics have not been defined. An 85-year-old man who had been treated for myelodysplastic syndrome and tuberculosis for several months presented with subacute fever and worsening left-side chest pain. Contrast-enhanced computed tomography images depicted massive tumor-like consolidation without enhancement, expanding from the left lower lobe. Emboli that did not respond to anticoagulants were detected in the left descending pulmonary artery. Despite intensive treatment he developed multiple organ failure and died 47 days after hospitalization. Gross pathology of a lung autopsy specimen revealed left lower pulmonary arterial emboli and pulmonary infarction, which was concluded to be the direct cause of death. The emboli were histopathologically identified as invasive mycelia in vessels. Mucor sp. was detected via real-time polymerase chain reaction and immunohistopathological analyses revealed that the mold in the blood vessels of lung tissue was partially positive for the mucor antigen. In the present case of Mucor sp. pulmonary emboli in a patient with myelodysplastic syndrome, radiographic findings were hard to distinguish from those typical of a lung abscess.
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Affiliation(s)
- T Kakuwa
- Department of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan
| | - A Ariga
- Department of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.,Department of Orthopedics, Tokyo Medical and Dental University, Tokyo, Japan
| | - J Takasaki
- Department of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan
| | - M Kato
- Department of Pathology, National Center for Global Health and Medicine, Tokyo, Japan
| | - T Igari
- Department of Pathology, National Center for Global Health and Medicine, Tokyo, Japan
| | - Y Shida
- Department of Radiology, National Center for Global Health and Medicine, Tokyo, Japan
| | - T Okafuji
- Department of Radiology, National Center for Global Health and Medicine, Tokyo, Japan
| | - S Nakamura
- Department of Chemotherapy and Mycoses, National Institute of Infectious Diseases, Tokyo, Japan.,Department of Microbiology, Tokyo Medical University, Tokyo, Japan
| | - Y Miyazaki
- Department of Chemotherapy and Mycoses, National Institute of Infectious Diseases, Tokyo, Japan
| | - H Katano
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - M Iikura
- Department of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan
| | - S Izumi
- Department of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan
| | - H Sugiyama
- Department of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan
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Seo M, Takabatake R, Izumi S, Unno H, Kawashima Y, Ki U, Hatada S, Katoh I, Nakazawa S, Matsumoto T, Yonekawa Y, Hashimoto M, Lin W, Maeda R, Riztyan, Onishi M, Futo S, Kishine M, Kitta K. Novel Bioprinting Application for the Production of Reference Material Containing a Defined Copy Number of Target DNA. Anal Chem 2019; 91:12733-12740. [PMID: 31482708 DOI: 10.1021/acs.analchem.9b02207] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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]
Abstract
Nucleic acid amplification methods, such as polymerase chain reaction (PCR), are extensively used in many applications to detect target DNA because of their high sensitivity, good reproducibility, and wide dynamic range of quantification. However, analytical quality control when detecting low copy number target DNA is often missing because of a lack of appropriate reference materials. Recent advances in analytical sciences require a method to accurately quantify DNA at the single molecule level. Herein, we have developed a novel method to produce reference material containing a defined copy number of target DNA (referred to as "cell number-based DNA reference material"). In this method, a suspension of cells carrying a single target DNA sequence was ejected by an inkjet head, and the number of cells in each droplet was counted using highly sensitive cameras. The resulting solutions contained a defined copy number of target DNA and could be used as reference materials. The use of the newly developed reference material was compared with that of diluted solutions of target DNA to evaluate the performance of qualitative real-time PCR in terms of the limit of detection (LOD). Our results demonstrated that cell number-based DNA reference material provides more accurate information regarding performance quality. The reference material produced by this method is a promising tool to evaluate assay performance.
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Affiliation(s)
- Manabu Seo
- Biomedical Business Center, Healthcare Business Group , Ricoh Co., Ltd. , 3-25-22 Tonomachi LIC 322, Kawasaki , Kanagawa 210-0821 , Japan
| | - Reona Takabatake
- Division of Analytical Science, Food Research Institute , National Agriculture and Food Research Organization , 2-1-12 Kannondai , Tsukuba , Ibaraki 305-8642 , Japan
| | - Satoshi Izumi
- Biomedical Business Center, Healthcare Business Group , Ricoh Co., Ltd. , 3-25-22 Tonomachi LIC 322, Kawasaki , Kanagawa 210-0821 , Japan
| | - Hirotaka Unno
- Biomedical Business Center, Healthcare Business Group , Ricoh Co., Ltd. , 3-25-22 Tonomachi LIC 322, Kawasaki , Kanagawa 210-0821 , Japan
| | - Yudai Kawashima
- Biomedical Business Center, Healthcare Business Group , Ricoh Co., Ltd. , 3-25-22 Tonomachi LIC 322, Kawasaki , Kanagawa 210-0821 , Japan
| | - Unoh Ki
- Biomedical Business Center, Healthcare Business Group , Ricoh Co., Ltd. , 3-25-22 Tonomachi LIC 322, Kawasaki , Kanagawa 210-0821 , Japan
| | - Shigeo Hatada
- Biomedical Business Center, Healthcare Business Group , Ricoh Co., Ltd. , 3-25-22 Tonomachi LIC 322, Kawasaki , Kanagawa 210-0821 , Japan
| | - Ikuo Katoh
- Biomedical Business Center, Healthcare Business Group , Ricoh Co., Ltd. , 3-25-22 Tonomachi LIC 322, Kawasaki , Kanagawa 210-0821 , Japan
| | - Satoshi Nakazawa
- Biomedical Business Center, Healthcare Business Group , Ricoh Co., Ltd. , 3-25-22 Tonomachi LIC 322, Kawasaki , Kanagawa 210-0821 , Japan
| | - Takahiko Matsumoto
- Biomedical Business Center, Healthcare Business Group , Ricoh Co., Ltd. , 3-25-22 Tonomachi LIC 322, Kawasaki , Kanagawa 210-0821 , Japan
| | - Yuuki Yonekawa
- Biomedical Business Center, Healthcare Business Group , Ricoh Co., Ltd. , 3-25-22 Tonomachi LIC 322, Kawasaki , Kanagawa 210-0821 , Japan
| | - Michie Hashimoto
- Biomedical Business Center, Healthcare Business Group , Ricoh Co., Ltd. , 3-25-22 Tonomachi LIC 322, Kawasaki , Kanagawa 210-0821 , Japan
| | - Waka Lin
- Biomedical Business Center, Healthcare Business Group , Ricoh Co., Ltd. , 3-25-22 Tonomachi LIC 322, Kawasaki , Kanagawa 210-0821 , Japan
| | - Reo Maeda
- Biomedical Business Center, Healthcare Business Group , Ricoh Co., Ltd. , 3-25-22 Tonomachi LIC 322, Kawasaki , Kanagawa 210-0821 , Japan
| | - Riztyan
- Fasmac Co., Ltd. , 5-1-3, Midorigaoka , Atsugi , Kanagawa 243-0041 , Japan
| | - Mari Onishi
- Fasmac Co., Ltd. , 5-1-3, Midorigaoka , Atsugi , Kanagawa 243-0041 , Japan
| | - Satoshi Futo
- Fasmac Co., Ltd. , 5-1-3, Midorigaoka , Atsugi , Kanagawa 243-0041 , Japan
| | - Masahiro Kishine
- Division of Analytical Science, Food Research Institute , National Agriculture and Food Research Organization , 2-1-12 Kannondai , Tsukuba , Ibaraki 305-8642 , Japan
| | - Kazumi Kitta
- Division of Analytical Science, Food Research Institute , National Agriculture and Food Research Organization , 2-1-12 Kannondai , Tsukuba , Ibaraki 305-8642 , Japan
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Watanabe K, Hong G, Tominami K, Izumi S, Hayashi Y, Kudo TA. Association between Beta3-Adrenergic Receptor Trp64Arg Polymorphism and Fat Preference in Healthy Young Japanese Women. TOHOKU J EXP MED 2019; 248:181-192. [PMID: 31353327 DOI: 10.1620/tjem.248.181] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Beta3-adrenergic receptor (ADRB3) is a mediator of catecholamine-stimulated lipolysis in humans. The Trp64Arg polymorphism with T/C transition in the ADRB3 gene has been considered to reduce lipolysis and metabolic expenditure. Here, we investigated the hitherto unknown role of the Trp64Arg substitution on food preference among healthy young adults (mean age, 24.3; n = 53, including 25 men). Preference toward four food types (bitter, sour, salty, or sweet) and greasy (high-fat) foods was examined using a self-reported questionnaire. There was no noticeable sex-difference in food preference. Incidentally, only among female subjects, the genotype frequencies of the Trp64Arg polymorphism were in accordance with the Hardy-Weinberg equilibrium. Consequently, female subjects were divided into two groups for further analyses: 18 subjects with TT genotype (Trp64Trp) (wild-type group) and 10 subjects with TC genotype (Trp64Arg) (heterozygous group). No significant difference was observed in preference for four food types between the groups. However, when sweet foods were divided into high-fat and low-fat subgroups, food preference for high-fat sweet foods in heterozygous group was significantly higher than that in wild-type group. Moreover, when subjects were divided into two classes based on preference for greasy foods (like, n = 16 or dislike, n = 12), the preference degree in heterozygous group who liked high-fat foods (n = 5) was significantly higher than that in wild-type group (n = 11), suggesting that the Trp64Arg substitution might genetically enhance high-fat food preference. Thus, understanding the relationship between ADRB3 Trp64Arg substitution and fat preference will be valuable for obesity prevention.
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Affiliation(s)
- Kei Watanabe
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry
| | - Guang Hong
- Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry
| | - Kanako Tominami
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry
| | - Satoshi Izumi
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry
| | - Yohei Hayashi
- Cell Resource Center for Biomedical Research, Institute of Development, Aging and Cancer, Tohoku University.,Graduate School of Life Sciences, Tohoku University
| | - Tada-Aki Kudo
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry
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Izumi S, Yoshinaga Y, Nakamura H, Takamori A, Takamori Y, Ukai T, Shiraishi C, Hara Y. A histopathologic study of the controlling role of T cells on experimental periodontitis in rats. J Dent Sci 2019; 13:87-96. [PMID: 30895102 PMCID: PMC6388841 DOI: 10.1016/j.jds.2017.05.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 05/07/2017] [Indexed: 12/21/2022] Open
Abstract
Background/purpose The onset and progression of periodontitis involve bacterial infection and the immune response. T cells function in the immune response and reportedly induce bone resorption in inflammatory bone loss. However, the exact role of T cells in periodontal destruction remains unclear. Using our experimental model of periodontitis, we aimed to investigate the influence of T cells on periodontal destruction. Materials and methods Male athymic nude (Nu) and euthymic wild-type (WT) rats were divided into the immunized (I-Nu and I-WT), non-immunized (nI-Nu and nI-WT). The immunized groups were immunized intraperitoneally with lipopolysaccharide (LPS). The non-immunized groups received phosphate-buffered saline (PBS). Nothing was administered to the non-treated groups. LPS was applied to the right palatal gingival sulcus in the immunized and non-immunized groups daily for 20 days. Loss of attachment, numbers of inflammatory cells and osteoclasts, and levels of alveolar bone were investigated histopathologically and histometrically. Osteoclasts were stained with tartrate-resistant acid phosphatase. The numbers of IL-4-positive cells were evaluated immunohistologically. Results Loss of attachment, numbers of inflammatory cells, levels of alveolar bone, and the number of osteoclasts were significantly increased in the nI-WT group compared with the nI-Nu group. However, the parameters were significantly increased in the I-Nu group compared with the I-WT group. The number of IL-4-positive cells was greater in the I-WT group than in the I-Nu group. Conclusion T cells promote inflammation in non-immunized animals; however, they regulate these processes in immunized animals.
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Affiliation(s)
- Satoshi Izumi
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yasunori Yoshinaga
- Section of Periodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
| | - Hirotaka Nakamura
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Akiko Takamori
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yuzo Takamori
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Takashi Ukai
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Chiaki Shiraishi
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yoshitaka Hara
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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12
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Brown S, Distefano E, Izumi S, Wade M, Lockhart J, Jaboin J. Caring Wisely: A Model for Improving Advanced Care Planning for Cancer Patients. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.1970] [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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13
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Uchiyama H, Tsujimoto M, Kimura A, Yuki E, Saiki T, Yoshida T, Furukubo T, Izumi S, Yamakawa T, Tachiki H, Minegaki T, Nishiguchi K. Effects of Uremic Serum Residue on OATP1B1- and OATP1B3-Mediated Pravastatin Uptake in OATP-Expressing HEK293 Cells and Human Hepatocytes. Ther Apher Dial 2018; 23:126-132. [PMID: 30318712 DOI: 10.1111/1744-9987.12758] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 08/24/2018] [Accepted: 08/28/2018] [Indexed: 11/30/2022]
Abstract
Patients with end-stage renal disease have increased plasma concentrations of statins, which is a risk factor for rhabdomyolysis, as well as elevated levels of uremic toxins (UTs). We investigated the effects of uremic serum residue and UTs on organic anion-transporting peptide (OATP1B1)- and OATP1B3-mediated pravastatin uptake. We evaluated the effects of normal serum residue with four UTs (hippuric acid, 3-carboxy-4-methyl-5-propyl-2-furan propionate, indole-3-acetic acid, and 3-indoxyl sulfate) and uremic serum residue on pravastatin uptake by OATP1B1- or OATP1B3-expressing HEK293 cells. Furthermore, we assessed the contribution of each transporter using cryopreserved human hepatocytes. Uremic serum residue and UTs significantly inhibited OATP1B1-mediated pravastatin uptake. Uremic serum residue accelerated OATP1B3-mediated pravastatin uptake, while UTs had no effect. There was no difference in pravastatin uptake between uremic- and normal serum residue-treated hepatocytes. The results suggest that the effects of uremic serum on pravastatin hepatic uptake may be considered negligible in end-stage renal disease patients.
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Affiliation(s)
- Hitoshi Uchiyama
- Scientific Research and Business Development Department, Towa Pharmaceutical Co. Ltd
| | - Masayuki Tsujimoto
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Science, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Akari Kimura
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Science, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Eriko Yuki
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Science, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Takashi Saiki
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Science, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Takuya Yoshida
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Science, Kyoto Pharmaceutical University, Kyoto, Japan.,Department of Pharmacy Service, Shirasagi Hospital, Osaka, Japan
| | - Taku Furukubo
- Department of Pharmacy Service, Shirasagi Hospital, Osaka, Japan
| | - Satoshi Izumi
- Department of Pharmacy Service, Shirasagi Hospital, Osaka, Japan
| | | | - Hidehisa Tachiki
- Scientific Research and Business Development Department, Towa Pharmaceutical Co. Ltd
| | - Tetsuya Minegaki
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Science, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Kohshi Nishiguchi
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Science, Kyoto Pharmaceutical University, Kyoto, Japan
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14
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Kinoshita M, Takechi K, Nagao Y, Izumi S, Arai Y, Shirono R, Iwamoto S, Takao S, Noda S, Ueno J, Harada M. Abstract No. 694 The impact of virtual liver parenchymal perfusion using existing 3-dimensional workstation and simulation software in conventional transcatheter arterial chemoembolization for hepatocellular carcinoma. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.739] [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: 10/17/2022] Open
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15
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Takamori A, Yoshinaga Y, Ukai T, Nakamura H, Takamori Y, Izumi S, Shiraishi C, Hara Y. Topical application of glycyrrhetinic acid in the gingival sulcus inhibits attachment loss in lipopolysaccharide-induced experimental periodontitis in rats. J Periodontal Res 2018; 53:422-429. [PMID: 29446076 DOI: 10.1111/jre.12529] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/08/2017] [Indexed: 01/03/2023]
Abstract
BACKGROUND AND OBJECTIVE Attachment loss of the junctional epithelium and alveolar bone destruction are signs of periodontitis, which is mainly caused by an inflammatory response to dental plaque. Glycyrrhetinic acid (GA), a component of the licorice herb, has been shown to have important anti-inflammatory activities; however, there are no previous reports on the ability of its inhibitory effects to prevent periodontal diseases. Hence, in this study, using our experimental periodontitis model, we attempted to evaluate whether GA had an effect on the prevention of attachment loss and alveolar bone loss. MATERIAL AND METHODS Rats were intraperitoneally immunized with Escherichia coli lipopolysaccharide (LPS). The LPS group (n = 5) received 3 topical applications of 50 μg/μL of LPS followed by one application of the vehicle (propylene glycol:ethyl alcohol:phosphate-buffered saline [PBS] = 8:1:1) into the gingival sulcus. This protocol was repeated twice per day for 10 days. The low (n = 5) and high (n = 5) groups received topical application of LPS and 0.03% or 0.3% GA, respectively. The control group received topical application of PBS and vehicle. The rats were killed on the 10th day. Attachment loss, alveolar bone level and inflammatory cell infiltration were investigated histometrically. The formation of immune complexes and infiltration of LPS were evaluated immunohistologically. RESULTS Attachment loss, formation of immune complexes and infiltration of inflammatory cells were increased in the LPS group compared with the control group, and were completely inhibited in the low and high groups compared with the LPS group. The LPS group showed greater alveolar bone destruction compared with the control group and GA-treated groups. In addition, invasion of LPS was detected in the LPS group, was absent in the control group and was weaker in the GA-treated groups than in the LPS group. CONCLUSION In the present study, we showed that GA inhibits periodontal destruction in the rat experimental periodontitis model.
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Affiliation(s)
- A Takamori
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Y Yoshinaga
- Section of Periodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
| | - T Ukai
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - H Nakamura
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Y Takamori
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - S Izumi
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - C Shiraishi
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Y Hara
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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Uchiyama H, Tsujimoto M, Shimada N, Tsutsui K, Nitta A, Yoshida T, Furukubo T, Izumi S, Yamakawa T, Tachiki H, Minegaki T, Nishiguchi K. Evaluation of Trace Elements in Augmentation of Statin-Induced Cytotoxicity in Uremic Serum-Exposed Human Rhabdomyosarcoma Cells. Toxins (Basel) 2018; 10:toxins10020053. [PMID: 29370118 PMCID: PMC5848154 DOI: 10.3390/toxins10020053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 01/12/2018] [Accepted: 01/23/2018] [Indexed: 02/07/2023] Open
Abstract
Patients with end-stage kidney disease (ESKD) are at higher risk for rhabdomyolysis induced by statin than patients with normal kidney function. Previously, we showed that this increase in the severity of statin-induced rhabdomyolysis was partly due to uremic toxins. However, changes in the quantity of various trace elements in ESKD patients likely contribute as well. The purpose of this study is to determine the effect of trace elements on statin-induced toxicity in rhabdomyosarcoma cells exposed to uremic serum (US cells) for a long time. Cell viability, apoptosis, mRNA expression, and intracellular trace elements were assessed by viability assays, flow cytometry, real-time RT-PCR, and ICP-MS, respectively. US cells exhibited greater simvastatin-induced cytotoxicity than cells long-time exposed with normal serum (NS cells) (non-overlapping 95% confidence intervals). Intracellular levels of Mg, Mn, Cu, and Zn were significantly less in US cells compared to that in NS cells (p < 0.05 or 0.01). Pre-treatment with TPEN increased simvastatin-induced cytotoxicity and eliminated the distinction between both cells of simvastatin-induced cytotoxicity. These results suggest that Zn deficiencies may be involved in the increased risk for muscle complaints in ESKD patients. In conclusion, the increased severity of statin-induced rhabdomyolysis in ESKD patients may be partly due to trace elements deficiencies.
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Affiliation(s)
- Hitoshi Uchiyama
- Research & Development Division, Towa Pharmaceutical Co., Ltd., Kyoto Research Park KISTIC#202, 134 Chudoji Minami-Machi, Shimogyo-ku, Kyoto 600-8813, Japan.
| | - Masayuki Tsujimoto
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Science, Kyoto Pharmaceutical University, 5 Misasagi Nakauchi-cho, Yamashina-ku, Kyoto 607-8414, Japan.
| | - Naomi Shimada
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Science, Kyoto Pharmaceutical University, 5 Misasagi Nakauchi-cho, Yamashina-ku, Kyoto 607-8414, Japan.
| | - Koji Tsutsui
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Science, Kyoto Pharmaceutical University, 5 Misasagi Nakauchi-cho, Yamashina-ku, Kyoto 607-8414, Japan.
| | - Ayaka Nitta
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Science, Kyoto Pharmaceutical University, 5 Misasagi Nakauchi-cho, Yamashina-ku, Kyoto 607-8414, Japan.
| | - Takuya Yoshida
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Science, Kyoto Pharmaceutical University, 5 Misasagi Nakauchi-cho, Yamashina-ku, Kyoto 607-8414, Japan.
- Department of Pharmacy Service, Shirasagi Hospital, 7-11-23 Kumata, Higashisumiyoshi-ku, Osaka 546-0002, Japan.
| | - Taku Furukubo
- Department of Pharmacy Service, Shirasagi Hospital, 7-11-23 Kumata, Higashisumiyoshi-ku, Osaka 546-0002, Japan.
| | - Satoshi Izumi
- Department of Pharmacy Service, Shirasagi Hospital, 7-11-23 Kumata, Higashisumiyoshi-ku, Osaka 546-0002, Japan.
| | - Tomoyuki Yamakawa
- Department of Medicine, Shirasagi Hospital, 7-11-23 Kumata, Higashisumiyoshi-ku, Osaka 546-0002, Japan.
| | - Hidehisa Tachiki
- Research & Development Division, Towa Pharmaceutical Co., Ltd., Kyoto Research Park KISTIC#202, 134 Chudoji Minami-Machi, Shimogyo-ku, Kyoto 600-8813, Japan.
| | - Tetsuya Minegaki
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Science, Kyoto Pharmaceutical University, 5 Misasagi Nakauchi-cho, Yamashina-ku, Kyoto 607-8414, Japan.
| | - Kohshi Nishiguchi
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Science, Kyoto Pharmaceutical University, 5 Misasagi Nakauchi-cho, Yamashina-ku, Kyoto 607-8414, Japan.
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Toma M, Izumi S, Tawa K. Rapid and sensitive detection of neuron specific enolase with a polydopamine coated plasmonic chip utilizing a rear-side coupling method. Analyst 2018; 143:858-864. [DOI: 10.1039/c7an01577a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [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 rapid and sensitive detection of a cancer marker, neuron specific enolase (NSE), is demonstrated by using a disposable silver plasmonic chip functionalized with a mussel-inspired polydopamine (PDA) coating.
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Affiliation(s)
- M. Toma
- Department of Applied Chemistry for Environment
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
| | - S. Izumi
- Department of Chemistry
- Graduate School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
| | - K. Tawa
- Department of Applied Chemistry for Environment
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
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18
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Ishii Y, Hashimoto Y, Kono S, Izumi S, Iizuka J, Karasawa K. High Dose Rate Brachytherapy With Hypofractionated External Beam Radiation Therapy for High-Risk Prostate Cancer. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1180] [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: 10/18/2022]
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19
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Shoji T, Yamasaki T, Izumi S, Murakami H, Mifuji K, Sawa M, Yasunaga Y, Adachi N, Ochi M. Factors affecting the potential for posterior bony impingement after total hip arthroplasty. Bone Joint J 2017; 99-B:1140-1146. [DOI: 10.1302/0301-620x.99b9.bjj-2016-1078.r2] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 05/09/2017] [Indexed: 11/05/2022]
Abstract
Aims Our aim was to evaluate the radiographic characteristics of patients undergoing total hip arthroplasty (THA) for the potential of posterior bony impingement using CT simulations. Patients and Methods Virtual CT data from 112 patients who underwent THA were analysed. There were 40 men and 72 women. Their mean age was 59.1 years (41 to 76). Associations between radiographic characteristics and posterior bony impingement and the range of external rotation of the hip were evaluated. In addition, we investigated the effects of pelvic tilt and the neck/shaft angle and femoral offset on posterior bony impingement. Results The range of external rotation and the ischiofemoral length were significantly lower, while femoral anteversion, the ischial ratio, and ischial angle were significantly higher in patients with posterior bony impingement compared with those who had implant impingement (p < 0.05). The range of external rotation positively correlated with ischiofemoral length (r = 0.49, p < 0.05), and negatively correlated with ischial length (r = -0.49, p < 0.05), ischial ratio (r =- 0.49, p < 0.05) and ischial angle (r = -0.55, p < 0.05). The range of external rotation was lower in patients with posterior pelvic tilt (p < 0.05) and in those with a high offset femoral component (p < 0.05) due to posterior bony impingement. Conclusion Posterior bony impingement after THA is more likely in patients with a wider ischium and a narrow ischiofemoral space. A high femoral offset and posterior pelvic tilt are also risk factors for this type of impingement. Cite this article: Bone Joint J 2017;99-B:1140–6.
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Affiliation(s)
- T. Shoji
- Graduate School of Biomedical Sciences,
Hiroshima University,
1-2-3 Kasumi, Minami-ku, Hiroshima
734-8551, Japan
| | - T. Yamasaki
- Graduate School of Biomedical Sciences,
Hiroshima University,
1-2-3 Kasumi, Minami-ku, Hiroshima
734-8551, Japan
| | - S. Izumi
- Graduate School of Biomedical Sciences,
Hiroshima University,
1-2-3 Kasumi, Minami-ku, Hiroshima
734-8551, Japan
| | - H. Murakami
- Graduate School of Biomedical Sciences,
Hiroshima University,
1-2-3 Kasumi, Minami-ku, Hiroshima
734-8551, Japan
| | - K. Mifuji
- Graduate School of Biomedical Sciences,
Hiroshima University,
1-2-3 Kasumi, Minami-ku, Hiroshima
734-8551, Japan
| | - M. Sawa
- Graduate School of Biomedical Sciences,
Hiroshima University,
1-2-3 Kasumi, Minami-ku, Hiroshima
734-8551, Japan
| | - Y. Yasunaga
- Hiroshima Prefectural Rehabilitation Center, 295-3
Taguchi, Saijo-town, Higashi-hiroshima, 739-0036, Japan
| | - N. Adachi
- Graduate School of Biomedical Sciences,
Hiroshima University,
1-2-3 Kasumi, Minami-ku, Hiroshima
734-8551, Japan
| | - M. Ochi
- Graduate School of Biomedical Sciences,
Hiroshima University,
1-2-3 Kasumi, Minami-ku, Hiroshima
734-8551, Japan
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Izumi S, Basin B, McCalmont J, Presley M, Baggs J. REGISTERED NURSES PROVIDING PRIMARY PALLIATIVE CARE DURING TRANSITION FROM HOSPITAL TO HOME. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S. Izumi
- Oregon Health and Science University, Portland, Oregon
| | - B. Basin
- Oregon Health and Science University, Portland, Oregon
| | - J. McCalmont
- Oregon Health and Science University, Portland, Oregon
| | - M. Presley
- Oregon Health and Science University, Portland, Oregon
| | - J.G. Baggs
- Oregon Health and Science University, Portland, Oregon
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Nozaki M, Kagami Y, Shibata T, Nakamura K, Ito Y, Nishimura Y, Kawaguchi Y, Saito Y, Nagata Y, Matsumoto Y, Akimoto T, Nishimura T, Uno T, Tsujino K, Kataoka M, Kodaira T, Shiraishi K, Inoue K, Isohashi F, Hiraoka M, Karasawa K, Izumi S, Sakurai H. EP-1156: A clinical trial on hypofractionated whole breast irradiation after breast-conserving surgery. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31592-x] [Citation(s) in RCA: 1] [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: 10/19/2022]
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Chino H, Iikura M, Saito N, Sato N, Suzuki M, Ishii S, Morino E, Naka G, Takasaki J, Izumi S, Hojo M, Takeda Y, Sugiyama H. Subinterlobular Pleural Location Is a Risk Factor for Pneumothorax After Bronchoscopy. Respir Care 2016; 61:1664-1670. [DOI: 10.4187/respcare.04874] [Citation(s) in RCA: 3] [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: 11/05/2022]
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Izumi S, Hong G, Iwasaki K, Izumi M, Matsuyama Y, Chiba M, Toda T, Kudo TA. Gustatory Salivation Is Associated with Body Mass Index, Daytime Sleepiness, and Snoring in Healthy Young Adults. TOHOKU J EXP MED 2016; 240:153-165. [PMID: 27760896 DOI: 10.1620/tjem.240.153] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The taste detection system for oral fatty acid may be related to obesity. In addition, sleep is intrinsically and closely related to food intake and metabolism. However, the association of gustatory salivation with body mass index (BMI), daytime sleepiness, or sleep habits is largely unknown. Therefore, we evaluated the relationship between gustatory salivation and BMI, Epworth sleepiness scale (ESS, a daytime sleepiness scale) or sleep habits among 26 healthy young individuals (20 males and 6 females; mean age: 26.0 ± 4.3 years). We also measured the saliva flow rate (SFR) that was induced by gum-chewing or each of three prototypical tastants (acetic acid, sucrose, and NaCl). Further, the SFR was induced by fatty acid, provided as oleic acid (OA) homogenized in non-fat milk. All participants showed normal rates of salivation during resting and gum-chewing states. The increase in the SFR induced by OA, but not by each of the three tastants, was associated with BMI. Moreover, both daytime sleepiness level and frequency of snoring were associated with the increase in the SFR induced by NaCl. These results suggest that BMI is associated with salivation induced by oral fatty acid exposure. Additionally, the regulatory mechanism for the NaCl-induced salivation reflex may have a relationship with impairments of the respiratory control system that are related to snoring during sleep and lead to daytime sleepiness because of insufficient sleep. Thus, measurement of gustatory salivation might contribute to the evaluation and prevention of obesity and sleep-related breathing disorders.
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Affiliation(s)
- Satoshi Izumi
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry
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Asano M, Hong G, Matsuyama Y, Wang W, Izumi S, Izumi M, Toda T, Kudo TA. Association of Oral Fat Sensitivity with Body Mass Index, Taste Preference, and Eating Habits in Healthy Japanese Young Adults. TOHOKU J EXP MED 2016; 238:93-103. [PMID: 26797054 DOI: 10.1620/tjem.238.93] [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: 11/18/2022]
Abstract
Oral fat sensitivity (OFS, the ability to detect fat) may be related to overeating-induced obesity. However, it is largely unknown whether OFS affects taste preference and eating habits. Therefore, we aimed to evaluate (1) the association between body mass index (BMI) and OFS and (2) the relationship of OFS with four types of taste preference (sweet, sour, salty, and bitter) and eating habits using serial concentrations of oleic acid (OA) homogenized in non-fat milk and a self-reported questionnaire. Participants were 25 healthy Japanese individuals (mean age: 27.0 ± 5.6 years), among whom the OA detection threshold was significantly associated with BMI. Participants were divided into two subgroups based on oral sensitivity to 2.8 mM OA: hypersensitive (able to detect 2.8 mM OA, n = 16) and hyposensitive (unable to detect 2.8 mM OA, n = 9). The degree of sweet taste preference of the hypersensitive group was significantly higher than that of the hyposensitive group. Furthermore, there was significantly higher degree of preference for high-fat sweet foods than low-fat sweet foods in the hypersensitive group. There was also a significant inverse correlation between the OA detection threshold and the degree of both spare eating and postprandial satiety. Thus, OFS is associated not only with BMI, but also with the preference for high-fat sweet foods and eating habits. The present study provides novel insights that measuring OFS may be useful for assessing the risk of obesity associated with overeating in countries, including Japan, where BMI is increasing in the population.
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Affiliation(s)
- Masanobu Asano
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry
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Kono S, Ishii Y, Matsubara H, Izumi S, Hashimoto Y, Karasawa K. Is Involved-Field Irradiation Sufficient for Superficial Esophageal Carcinoma? Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.998] [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: 10/20/2022]
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Tsuchiya Y, Shida N, Izumi S, Ogasawara M, Kakinuma W, Tsujiuchi T, Machida K. Factors associated with mothers not vaccinating their children against mumps in Japan. Public Health 2016; 137:95-105. [PMID: 27062068 DOI: 10.1016/j.puhe.2016.03.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 11/05/2015] [Accepted: 03/02/2016] [Indexed: 10/22/2022]
Abstract
OBJECTIVES In Japan, mumps immunization is not mandatory, and the prevalence of mumps immunization among eligible children is only about 30%, raising concerns about increased risk of meningitis, encephalitis and deafness caused by mumps. In 2011, to understand why families are not voluntarily immunizing their children against mumps, we surveyed mothers who were university graduates to examine the factors and barriers influencing mumps vaccination in Japan. STUDY DESIGN A cross sectional design. METHODS We sent questionnaires including questions on demographic data and vaccination status, barriers and factors for immunizations to university alumnae to recruit participants. Data were analysed by Student's t-test for continuous variables and by univariate and multivariate analysis to obtain the odds ratio and adjusted odds ratio. RESULTS Two hundred and twenty-six mothers with children responded with an average (range) age of 44.7 years (SD = 5.02; 30-55 years). Adjusted odds ratios (aOR) from logistic regression analysis identified fear of harmful side-effects (aOR, 2.55; 95% CI, 1.10 to 5.89), the vaccination not being mandatory (aOR, 3.30; 95% CI, 1.41 to 7.72), perceived non-efficacy (aOR, 6.21; 95% CI, 1.85 to 20.91) and being busy (aOR, 3.30; 95% CI, 1.21 to 9.01) were significantly and inversely associated with mumps vaccination. Recommendations from family doctors (aOR, 0.35; 95% CI, 0.17 to 0.71), living abroad when their children would be vaccinated (aOR, 0.10; 95% CI, 0.02 to 0.68) and the maternal age (aOR, 0.91; 95% CI, 0.85 to 0.96) were significant and positively associated with vaccination. CONCLUSIONS In the absence of mandatory vaccinations, a public education campaign about mumps, their potential consequences and the nature and value of vaccination could improve the prevalence of mumps vaccination among children and prevent the consequences of this disease.
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Affiliation(s)
- Y Tsuchiya
- Advanced Research Center for Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan.
| | - N Shida
- Advanced Research Center for Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan
| | - S Izumi
- Faculty of Home Economics, Koriyama Women's University, 3-25-2, Kaisei, Koriyama, Fukushima, Japan
| | - M Ogasawara
- Department of Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan
| | - W Kakinuma
- Advanced Research Center for Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan
| | - T Tsujiuchi
- Faculty of Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan
| | - K Machida
- Faculty of Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan
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Hashimoto Y, Akimoto T, Ishii Y, Kono S, Izumi S, Maebayashi K, Iizuka J, Tanabe K, Kiyozuka M, Mitsuhashi N, Karasawa K. EP-1646: HDR brachytherapy with hypofractionated EBRT for high risk prostate cancerSPAN STYLE="font-style:italic">. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32897-3] [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: 10/21/2022]
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Ishijima T, Muraki T, Sekiguchi Y, Ishikawa H, Morise S, Goto H, Izumi S. The characteristics of trunk posture and activities of scapular muscles in patients with partial-thickness rotator cuff tear. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.3484] [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: 11/27/2022]
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Ishikawa H, Muraki T, Sekiguchi Y, Ishijima T, Morise S, Yamamoto N, Itoi E, Izumi S. Differences in scapular upward rotation and activities of downward rotators during arm elevation between symptomatic and asymptomatic rotator cuff tears. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.3485] [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: 10/23/2022]
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Hashimoto Y, Akimoto T, Motegi A, Yuka I, Sawa K, Nakamura K, Izumi S, Maebayashi K, Iizuka J, Tanabe K, Kiyozuka M, Mitsuhashi N. Hypofractionated Image-Guided IMRT for Clinically Localized Prostate Cancer: A Total Dose of 66Gy Delivered to 3 Gy per Fraction Three Times per Week. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1288] [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: 10/24/2022]
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31
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Kaida T, Izumi S, Sakai S. Sensitivity Analysis of Fitness-for-Service Assessment Based on Reliability for Cylindrical Pressure Vessels With Local Metal Loss. J Press Vessel Technol 2013; 135:0612021-612028. [PMID: 24891750 PMCID: PMC3994779 DOI: 10.1115/1.4024455] [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: 01/07/2013] [Revised: 03/19/2013] [Indexed: 06/03/2023]
Abstract
Concern about fitness-for-service (FFS) assessments using stochastic analyses for aged pressure equipment with local metal loss has been growing. When a decision must be made regarding whether to run or repair equipment with local metal loss, a structural integrity assessment based on reliability helps. In analyses of failure probability, it is important to identify which variables strongly affect the structural integrity. The stochastic properties of influential parameters must be clarified, but few data have been published regarding the quantitative analysis of the sensitivity of the parameters in FFS assessments of components with local metal loss. Here, we investigated the effects of parameters on the plastic collapse of a damaged cylindrical pressure vessel with local metal loss, in an evaluation of parameter sensitivity. We also analyzed sensitivity indices for the component with several shapes of local metal loss. We found that the corrosion rate has a major influence on the probability of failure. We propose a practical stochastic analysis procedure for components with local metal loss. In this procedure, the parameter that has consistently low sensitivity to the limit state is used as a constant value.
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Affiliation(s)
- Takuyo Kaida
- Sumitomo Chemical Co., Ltd. , 5-l, Sobiraki-cho , Niihama City , Ehime, 792-8521 , Japan e-mail:
| | | | - Shinsuke Sakai
- e-mail: The University of Tokyo , 7-3-1, Hongo , Bunkyo-ku , Tokyo, 113-8656 , Japan
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Tsujimoto M, Sugimoto S, Nagatomo M, Furukubo T, Izumi S, Yamakawa T, Minegaki T, Nishiguchi K. Possibility of decrease in CYP1A2 function in patients with end-stage renal disease. Ther Apher Dial 2013; 18:174-80. [PMID: 24119207 DOI: 10.1111/1744-9987.12100] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Propranolol, the substrate of cytochrome P450 (CYP) 1A2 and CYP2D6, has been reported to be in high concentrations in end-stage renal disease (ESRD) patients. This has been thought to be due to the decrease in the nonrenal clearance of propranolol. The objective of this study is to elucidate the reason for the decrease in nonrenal clearance in ESRD patients. CYP1A2 and CYP2D6 activities were estimated by the phenacetin O-deethylation and methoprolol O-demethylation methods, respectively. Pooled normal serum and pooled uremic serum were deproteinized by methanol in order to exclude high-molecular-weight compounds. We selected as candidate inhibitors: uremic toxins such as 3-indoxyl sulfate, 3-carboxy-4-methyl-5-propyl-2-furanpropanoic acid, indole-3-acetic acid, and hippuric acid, and xanthine derivatives such as allantoin, uric acid, and xanthine. In this study, uremic serum was found to inhibit the CYP1A2-mediated metabolism of phenacetin to acetaminophen in a concentration-dependent and competitive manner. Xanthine also inhibited the metabolism of CYP1A2. On the other hand, uremic serum and the four uremic toxins did not inhibit the CYP2D6-mediated metabolism of metoprolol to O-demethylmetoprolol. In conclusion, this study suggests that the increase of the bioavailability of propranolol in ESRD is partly induced by the inhibition of the hepatic metabolism of CYP1A2 by xanthine in the uremic serum.
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Affiliation(s)
- Masayuki Tsujimoto
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Science, Kyoto Pharmaceutical University, Kyoto, Japan
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Hirano S, Takeda Y, Naka G, Iikura M, Udagawa H, Izumi S, Sugiyama H, Kobayashi N. Docetaxel Monotherapy Compared with Carboplatin and Paclitaxel Doublet Chemotherapy in Elderly Patients with Non-Small-Cell Lung Cancer. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32450-9] [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: 11/15/2022] Open
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Tsujimoto M, Hatozaki D, Shima D, Yokota H, Furukubo T, Izumi S, Yamakawa T, Minegaki T, Nishiguchi K. Influence of serum in hemodialysis patients on the expression of intestinal and hepatic transporters for the excretion of pravastatin. Ther Apher Dial 2012. [PMID: 23190519 DOI: 10.1111/j.1744-9987.2012.01100.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
It is known that the lipid-lowering agent pravastatin, which is not metabolized by cytochrome P450, is eliminated as an unchanged drug in bile and urine. It is interesting to note that the non-renal clearance of pravastatin in end-stage renal failure patients is decreased compared with that of healthy volunteers. This study investigated the influence of uremic serum and toxins on the transport mechanisms of pravastatin to elucidate the cause of decreased non-renal clearance in end-stage renal failure patients. Caco-2 and Hep3B cells were used as models of intestinal epithelial cells and hepatocytes respectively. Normal and uremic serum were deproteinized by treatment with methanol. 3-Carboxy-4-methyl-5propyl-2-furanpropanoic acid (CMPF), hippuric acid, indole-3-acetic acid, 3-indoxyl sulfate, and p-cresol were chosen as uremic toxins. Uremic serum-treated Caco-2 cells exhibited significantly increased accumulation of pravastatin and significantly decreased expression of MRP2 mRNA compared with normal serum-treated Caco-2 cells. In addition, the expression of MRP2 mRNA tended to decrease in cells treated with CMPF, indole-3-acetic acid, or 3-indoxyl sulfate. Uremic serum-treated Hep3B cells showed a significantly decreased initial uptake rate of pravastatin; furthermore, the expressions of OATP1B1 and OATP2B1 mRNA were decreased compared to normal serum-treated Hep3B cells. These results suggest that the decrease in the non-renal clearance of pravastatin in end-stage renal failure patients is partly induced by the downregulation of intestinal MRP2 and hepatic OATP1B1 and/or OATP2B1 by various uremic toxins in end-stage renal failure patients.
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Affiliation(s)
- Masayuki Tsujimoto
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kyoto Pharmaceutical University, Kyoto, Japan
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Hashimoto Y, Maebayashi K, Izumi S, Motegi A, Mitsuhashi N. Dropped Head Syndrome Induced by Chemoradiotherapy for Nasopharyngeal Carcinoma: A Case Report. Jpn J Clin Oncol 2012; 42:1091-3. [DOI: 10.1093/jjco/hys135] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Manabe T, Higera-Iglesias AL, Takasaki J, Izumi S, Vazquez-Manriquez ME, Kudo K. Socioeconomic impact relating to clinical condition on Pandemic (H1N1) Influenza. BMC Proc 2011. [DOI: 10.1186/1753-6561-5-s1-p106] [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: 11/10/2022] Open
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37
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Kawamata H, Izumi S, Doi Y, Imai Y. Oral squamous cell carcinomas originating from minor salivary glands showed aggressive biological behavior and poor prognosis when compared to those from squamous epithelium. Int J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.ijom.2011.07.478] [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: 11/25/2022]
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Manabe T, Higera-Iglesias AL, Takasaki J, Izumi S, Vazquez-Manriquez ME, Kudo K. Socioeconomic impact relating to clinical condition on Pandemic (H1N1) Influenza. BMC Proc 2011. [PMCID: PMC3019421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- T Manabe
- Disease Control and Prevention Center, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, 162-8655 Japan
| | - AL Higera-Iglesias
- Research Center for Clinical Epidemiology, National Institute of Respiratory Diseases, Mexico D.F., Mexico
| | - J Takasaki
- Disease Control and Prevention Center, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, 162-8655 Japan
| | - S Izumi
- Disease Control and Prevention Center, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, 162-8655 Japan
| | - ME Vazquez-Manriquez
- Department of Pathology, National Institute of Respiratory Diseases, Mexico D.F., Mexico
| | - K Kudo
- Disease Control and Prevention Center, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, 162-8655 Japan
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Tsujimoto M, Higuchi K, Shima D, Yokota H, Furukubo T, Izumi S, Yamakawa T, Otagiri M, Hirata S, Takara K, Nishiguchi K. Inhibitory effects of uraemic toxins 3-indoxyl sulfate and p-cresol on losartan metabolism in vitro. J Pharm Pharmacol 2010; 62:133-8. [PMID: 20723009 DOI: 10.1211/jpp.62.01.0015] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
OBJECTIVES The purpose of this study was to clarify the cause of decreased metabolic clearance of losartan in patients with end-stage renal failure. The influence of serum from haemodialysis patients (uraemic serum) and uraemic toxins on the metabolism of losartan to EXP-3174 was investigated in vitro. METHODS The formation of EXP-3174 was estimated using pooled human liver microsomes. 3-Carboxy-4-methyl-5-propyl-2-furanpropanoic acid, hippuric acid, indole-3-acetic acid, 3-indoxyl sulfate and p-cresol were used as uraemic toxins. KEY FINDINGS Uraemic serum potently decreased the formation of EXP-3174 in pooled human liver microsomes. In addition, 3-indoxyl sulfate and p-cresol significantly decreased the formation of EXP-3174 in a concentration-dependent manner. Furthermore, normal serum (10% v/v) with both 3-indoxyl sulfate and p-cresol (both 20 micromol/l) significantly decreased the formation of EXP-3174 by 46%, which was similar to the level of inhibition with uraemic serum (10% v/v). CONCLUSIONS These results suggest that decreased the metabolic clearance of losartan in patients with end-stage renal failure is partly due to high concentrations of 3-indoxyl sulfate and p-cresol.
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Affiliation(s)
- Masayuki Tsujimoto
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kyoto Pharmaceutical University, Kyoto, Japan.
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40
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Cai LY, Izumi S, Suzuki T, Goya K, Nakamura E, Sugiyama T, Kobayashi H. Dioxins in ascites and serum of women with endometriosis: a pilot study. Hum Reprod 2010; 26:117-26. [PMID: 21106495 DOI: 10.1093/humrep/deq312] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Animal studies and laboratory experiments have demonstrated that exposure to dioxins may be involved in the pathophysiology of endometriosis. However, recent epidemiological investigations have shown conflicting results. Although peritoneal fluid is a specific microenvironment playing a pivotal role in the development of endometriosis, to our knowledge, there is no published study evaluating the concentrations of dioxins in serum and peritoneal fluid simultaneously. The present study explores the possible correlation between the local peritoneal fluid levels of dioxins and concurrent endometriosis. METHODS There were 17 infertile women enrolled in the present study. After the diagnostic laparoscopic examination, the women were divided into two groups: endometriosis (n = 10) and controls (n = 7). We measured 29 dioxins simultaneously in serum and peritoneal fluid samples: 7 polychlorinated dibenzo-p-dioxins (PCDDs), 10 polychlorinated dibenzofurans (PCDFs), and 12 polychlorinated biphenyls (dioxin-like PCBs). A dioxin toxic equivalency (TEQ) system was utilized to calculate the dioxin concentration in each sample. RESULTS Serum concentrations of itemized components of 29 dioxins were similar in the endometriosis patients compared with the controls. Higher concentrations of PCDFs and dioxin-like PCBs were observed in peritoneal fluid than in serum, whereas the reverse was shown for PCDDs. Statistical analysis showed that higher levels of dioxin TEQ (PCDDs and PCDFs) in peritoneal fluid were significantly associated with an increased risk of endometriosis (OR: 2.5; 95% CI: 1.17-5.34; P = 0.035). CONCLUSIONS This is the first report suggesting that higher concentrations of dioxins (PCDDs and PCDFs) in peritoneal fluid are linked to endometriosis. More detail and epidemiological research is warranted to further explore this link.
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Affiliation(s)
- L Y Cai
- Department of Obstetrics and Gynecology, Tokai University School of Medicine, Isehara, Kanagawa, Japan
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Motegi A, Akimoto T, Kiyozuka M, Izumi S, Hashimoto Y, Nakamura K, Maebayashi K, Iizuka J, Tanabe K, Mitsuhashi N. Correlation between the Changes in the Epic QOL Score and the Severity of Acute Genitourinary Toxicity after Permanent Brachytherapy with I-125 Alone for Prostate Cancer. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.922] [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: 11/28/2022]
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Oouchida Y, Mori T, Suzuki E, Izumi S. P11-1 Inhibitory 1Hz TMS to supplementary motor area reduced action tremor. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60678-5] [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: 10/18/2022]
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Matsuzaka Y, Kikuti YY, Izumi S, Suzuki T, Cai LY, Goya K, Inoko H, Makino T, Kulski JK, Kimura M. Mapping of susceptibility locus for endometriosis within the HLA region using microsatellite markers in Japanese women. ACTA ACUST UNITED AC 2010; 75:65-7. [PMID: 20196820 DOI: 10.1111/j.1399-0039.2009.01391.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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]
Abstract
Endometriosis is a female disorder characterized by the presence of uterine endometrial tissue in ectopic loci. Previous studies reported a higher prevalence of particular human leukocyte antigen (HLA) in endometriosis. In order to confirm the association between endometriosis and the HLA region, 15 polymorphic microsatellite markers distributed in the HLA class II to class III region were subjected to association analysis by polymerase chain reaction (PCR)-based DNA typing of 89 patients and 136 healthy controls. Statistical analysis of the allelic frequency at each microsatellite locus showed that there were no statistically significant differences in the allele frequency distributions between the cases and controls. This finding suggests that the etiology of endometriosis does not involve the HLA class II genomic region and a portion of class III genomic region in the Japanese population.
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Affiliation(s)
- Y Matsuzaka
- Department of Molecular Life Science, Tokai University School of Medicine, Bohseidai, Isehara, Kanagawa, Japan
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Yamanaka S, Izumi S, Maekawa S, Umemoto K. Phase diagram of the La–Si binary system under high pressure and the structures of superconducting LaSi5 and LaSi10. J SOLID STATE CHEM 2009. [DOI: 10.1016/j.jssc.2009.05.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Satoh M, Koizumi A, Izumi S, Kugoh Y, Kiriyama E, Oguma E, Furukubo T, Matsunaga C, Yamakawa T, Kadowaki D, Hirata S. Improvement of Hyperphosphatemia following Patient Education. J Pharm Technol 2009. [DOI: 10.1177/875512250902500102] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Background: Patient adherence to a phosphate binder treatment regimen is crucial in the management of hyperphosphatemia. Nonadherence may be due to a lack of patient knowledge of the nature and treatment of the illness. Objective: To investigate the effectiveness of pharmacist-provided education regarding phosphate binders and hyperphosphatemia on serum phosphate concentration and calcium x phosphorous product in hemodialysis patients. Methods: A total of 398 hemodialysis patients who were prescribed phosphate binders participated in a pharmacist-run, education-based intervention session regarding phosphate binders and hyperphosphatemia. Each session was individualized on the basis of patient knowledge, assessed via a questionnaire. Particular attention was given to correcting patient misconceptions. Patients with elevated serum phosphate received additional education. Mean serum concentrations of phosphate and calcium, averaged from 4 measurements obtained at both baseline and postintervention, were compared to evaluate the efficacy of the intervention. Results: Postintervention, patients with the highest baseline serum phosphate concentrations (≥7.0 mg/dL) showed a significant decrease in mean ± SD serum concentrations of phosphate and calcium-phosphate product (7.4 ± 0.4 mg/dL and 72.6 ± 6.4 mg2/dL2 to 6.5 ± 0.8 mg/dL and 63.1 ± 8.4 mg2/dL2, respectively; p < 0.001). Likewise, patients with serum phosphate concentrations ranging from 6.0–6.9 mg/dL showed a significant decrease in both parameters after educational intervention (p < 0.05 and p < 0.005, respectively). Conclusions: An education session regarding phosphate binders and hyperphosphatemia, provided by pharmacists for hemodialysis patients, appeared effective in reducing serum phosphate concentrations and calcium x phosphorus product, thus contributing to improved patient prognoses.
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Affiliation(s)
- Minori Satoh
- MINORI SATOH MS, Pharmacist, Department of Pharmacy Services, Shirasagi Hospital, Osaka, Japan
| | - Akiko Koizumi
- AKIKO KOIZUMI BS, Manager, Kumata Pharmacy, Pharmarise Corporation, Osaka
| | - Satoshi Izumi
- SATOSHI IZUMI BS, Manager, Department of Pharmacy Services, Shirasagi Hospital
| | - Yasuhiro Kugoh
- YASUHIRO KUGOH BS, Pharmacist, Kumata Pharmacy, Pharmarise Corporation
| | - Eriko Kiriyama
- ERIKO KIRIYAMA BS, Pharmacist, Kumata Pharmacy, Pharmarise Corporation
| | - Emiko Oguma
- EMIKO OGUMA BS, District Manager of Osaka, Pharmarise Corporation
| | - Taku Furukubo
- TAKU FURUKUBO MS, Chief, Department of Pharmacy Services, Shirasagi Hospital
| | - Chiharu Matsunaga
- CHIHARU MATSUNAGA MS, Pharmacist, Department of Pharmacy Services, Shirasagi Hospital
| | | | - Daisuke Kadowaki
- DAISUKE KADOWAKI PhD, Research Associate, Division of Clinical Pharmacology, Faculty of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
| | - Sumio Hirata
- SUMIO HIRATA PhD, Professor, Division of Clinical Pharmacology, Faculty of Pharmaceutical Sciences, Kumamoto University
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Akutsu K, Takatori S, Nakazawa H, Hayakawa K, Izumi S, Makino T. Dietary intake estimations of polybrominated diphenyl ethers (PBDEs) based on a total diet study in Osaka, Japan. Food Additives and Contaminants: Part B 2008; 1:58-68. [DOI: 10.1080/19393210802236901] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Matsunaga C, Izumi S, Furukubo T, Satoh M, Yamakawa T, Uchida T, Kadowaki D, Hirata S. Effect of famotidine and lansoprazole on serum phosphorus levels in hemodialysis patients on calcium carbonate therapy. Clin Nephrol 2008; 68:93-8. [PMID: 17722708 DOI: 10.5414/cnp68093] [Citation(s) in RCA: 7] [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] Open
Abstract
AIMS Histamine H2 receptor antagonists (HRA) or proton pump inhibitors (PPI) are frequently administered to patients on hemodialysis, because their intestinal mucosa is fragile. Although three studies have indicated that concomitant HRA administration causes a decrease in the binding of phosphate by calcium carbonate, the HRA doses tested in these studies were 2-4 times higher than the recommended dose for hemodialysis patients. In addition, it remains unclear whether PPI therapy affects serum phosphate levels in hemodialysis patients taking calcium carbonate. Accordingly, the aim of this study was to evaluate the influence of lansoprazole and the recommended dose of famotidine on serum phosphate and calcium levels in hemodialysis patients. METHODS The study included 115 hemodialysis patients who were taking calcium carbonate and who were also treated with either famotidine (10 mg/day) or lansoprazole (30 mg/day). Changes of the mean serum phosphate and calcium levels over 2 months before and after the start of famotidine or lansoprazole therapy were compared. The same parameters were also compared when famotidine was switched to lansoprazole. RESULTS The mean serum phosphate level increased significantly after administration of either famotidine or lansoprazole (by 6.6 +/- 21.9% or 13.0 +/- 26.3%, p = 0.032 and p = 0.029, respectively). The mean serum calcium level was unchanged after administration of famotidine, but showed a significant decrease after administration of lansoprazole (by 3.44 +/- 7.73%, p = 0.013). Therefore, the calcium x phosphorus product was significantly increased by administration of famotidine, but not by administration of lansoprazole (6.68 +/- 23.37% and 8.73 +/- 27.41%, p = 0.046 and p = 0.251, respectively). When famotidine was switched to lansoprazole, the serum phosophate level did not change, but serum calcium decreased significantly by 3.8 +/- 13.0% (p = 0.0006). CONCLUSION Not only administration of 20 mg/ day of famotidine as previously reported, but also 10 mg/day of this drug (the recommended dose for hemodialysis patients) caused a significant increase of serum phosphate in patients taking calcium carbonate. PPIs have been reported to show no effect on the serum phosphate level, but 30 mg/day of lansoprazole also caused a significant increase of serum phosphate in patients taking calcium carbonate.
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Affiliation(s)
- C Matsunaga
- Department of Pharmacy Services, Shirasagi Hospital, Osaka, Japan
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Minami H, Asada T, Gan K, Abe K, Izumi S. Myocardial ischemia due to compression of an unruptured thoracic aortic aneurysm in a patient with Marfan syndrome. Gen Thorac Cardiovasc Surg 2007; 55:248-51. [PMID: 17642279 DOI: 10.1007/s11748-007-0113-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 11/29/2022]
Abstract
We report a 33-year-old woman who had a 60-mm thoracic aneurysm of the ascending aorta with Marfan syndrome and effort angina due to compression of the right coronary artery (RCA) by the aneurysm. Surgery was performed using the Bentall procedure and a coronary artery bypass graft to the RCA. Postoperatively, coronary angiography showed that the coronary flow of the RCA was restored by removing the aneurysmal compression. The patient was discharged without angina on postoperative day 21.
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Affiliation(s)
- Hiroya Minami
- Department of Cardiovascular Surgery, Miki City Hospital, 58-1 Kasa, Miki, Hyogo, Japan.
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Izumi S, Yamamoto M, Suzuki K, Shimizu A, Aranishi F. Identification and detection of Pseudomonas plecoglossicida isolates with PCR primers targeting the gyrB region. J Fish Dis 2007; 30:391-7. [PMID: 17584436 DOI: 10.1111/j.1365-2761.2007.00820.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Pseudomonas plecoglossicida is the agent of bacterial haemorrhagic ascites (BHA) in freshwater fish farming in Japan. To develop a rapid identification and detection method for P. plecoglossicida, a PCR amplification technique targeting the chromosomal DNA region coding the B subunit of the DNA gyrase (gyrB) was used. The nucleotide sequences of gyrB were determined in nine isolates of P. plecoglossicida and two other Pseudomonas species. On the basis of these determined sequences and the gyrB sequences of other Pseudomonas species or fish pathogenic bacteria deposited in international nucleotide sequence databases (GenBank/EMBL/DDBJ), PCR primers PL-G1F, PL-G1R, PL-G2F and PL-G2R were designed for specific amplification of the partial gyrB of P. plecoglossicida. The specificity of these primers in amplifying the gyrB of P. plecoglossicida was verified using selected strains of related bacterial species. The nested PCR technique was used to detect P. plecoglossicida from kidney and intestine of ayu. Primer pair PL-G1F and PL-G1R was used for the external PCR, and primer pair PL-G2F and PL-G2R for the internal PCR. Of 10 ayu juveniles, expected size PCR products were observed from intestine and kidney samples in one and two specimens, respectively. The PCR technique with primers based on the gyrB sequence is thus useful for the diagnosis of BHA.
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Affiliation(s)
- S Izumi
- Stock Assessment Division, National Institute of Fisheries Science, Yokohama, Japan.
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Arai H, Morita Y, Izumi S, Katagiri T, Kimura H. Molecular typing by pulsed-field gel electrophoresis of Flavobacterium psychrophilum isolates derived from Japanese fish. J Fish Dis 2007; 30:345-55. [PMID: 17498178 DOI: 10.1111/j.1365-2761.2007.00809.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Sixty-four isolates of Flavobacterium psychrophilum from ayu, Plecoglossus altivelis altivelis (Temminck & Schlegel), and other fish (n=16) in Japan and the type strain (NCIMB 1947(T)) were typed using pulsed-field gel electrophoresis (PFGE) with endonuclease BlnI and XhoI. These isolates were classified into 20 clusters and 42 genotypes by PFGE analysis. The most predominant cluster of isolates from ayu was cluster XII (n=20), followed by clusters XVII, XVI, XX, XI, IX, X, XIII and XV; the remaining 17 isolates from other fish were divided into clusters I, II, III, IV, V, VI, VII, VIII, XIV, XVIII and XIX. The PFGE genotype of isolates from ayu clearly differed from those of other fish. The isolates from ayu in Gunma Prefecture belonged to clusters XII, XVI, XVII and XX, and the strains of three of these clusters (XII, XVII and XX) were isolated from ayu in 15 of 19 prefectures. PFGE typing enabled more accurate classification of isolates into clusters than previously achieved by analysing the restriction fragment length polymorphism of PCR products. These results suggest that F. psychrophilum isolated from ayu and other fish are genetically different and strains with several PFGE types have spread within Japan.
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Affiliation(s)
- H Arai
- Gunma Prefectural Fisheries Experiment Station, Maebashi, Gunma, Japan
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