1
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Maezawa M, Inoue M, Satake R, Wakabayashi W, Oura K, Goto F, Miyasaka K, Hirofuji S, Iwata M, Suzuki T, Tanaka H, Nishida S, Shimizu S, Suzuki A, Iguchi K, Nakamura M. Effect of acid suppressant medications on the laxative action of magnesium preparations in patients with opioid-induced constipation: A pharmacovigilance analysis of the FDA Adverse Event Reporting System. Pharmazie 2023; 78:245-250. [PMID: 38178284 DOI: 10.1691/ph.2023.3624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
Objective: Magnesium oxide is widely used for treating opioid-induced constipation, a serious analgesic-associated problem. Opioid analgesic users are often prescribed non-steroidal anti-inflammatory drugs, which are sometimes combined with acid suppressants to prevent gastrointestinal adverse events. Magnesium preparations combined with acid suppressants may diminish magnesium preparations' laxative effect. This study was aimed at evaluating the effect of magnesium preparations combined with acid suppressants on the incidence of opioid-induced constipation by using the Food and Drug Administration Adverse Event Reporting System. Methods: Adverse events were defined per the Medical Dictionary for Regulatory Activities; the term 'constipation (preferred term code: 10010774)' was used for analysis. After adjusting for patient background factors using propensity score matching, acid suppressants' effect on constipation incidence was evaluated in opioid users prescribed magnesium preparations alone as laxatives by using a test for independence. Key Findings: The Food and Drug Administration Adverse Event Reporting System contains 14,475,614 reports for January 2004 to December 2021. Significantly increased constipation incidence was related to magnesium preparations combined with acid suppressants, especially proton pump inhibitors (P < 0.0001, McNemar's test). Conclusion: Magnesium preparations combined with acid suppressants may diminish magnesium preparations' laxative effect; healthcare professionals should pay attention to this issue.
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Affiliation(s)
- M Maezawa
- Laboratory of Drug Informatics, Gifu Pharmaceutical Universit
| | - M Inoue
- Laboratory of Drug Informatics, Gifu Pharmaceutical University
| | - R Satake
- Laboratory of Drug Informatics, Gifu Pharmaceutical University
| | - W Wakabayashi
- Laboratory of Drug Informatics , Gifu Pharmaceutical University
| | - K Oura
- Laboratory of Drug Informatics, Gifu Pharmaceutical University
| | - F Goto
- Laboratory of Drug Informatics, Gics, Gifu Pharmaceutical University
| | - K Miyasaka
- Laboratory of Drug Informatics, Gics, Gifu Pharmaceutical University
| | - S Hirofuji
- Laboratory of Drug Informatics, Gifu Pharmaceutical University
| | - M Iwata
- Laboratory of Drug Informatics, Gifu Pharmaceutical University; Kifune Pharmacy
| | - T Suzuki
- Laboratory of Drug Informatics, Gifu Pharmaceutical University; Gifu Prefectural Government
| | - H Tanaka
- Laboratory of Drug Informatics, Gifu Pharmaceutical University; Chubu Yakuhin Co. Ltd
| | - S Nishida
- Department of Pharmacy, Gifu University Hospital
| | - S Shimizu
- Department of Pharmacy, Gifu University Hospital
| | - A Suzuki
- Department of Pharmacy, Gifu University Hospital
| | - K Iguchi
- Laboratory of Community Pharmacy, Gifu Pharmaceutical University, Gifu, Japan
| | - M Nakamura
- Laboratory of Drug Informatics, Gifu Pharmaceutical University; Corresponding author: Mitsuhiro Nakamura, Laboratory of Drug Informatics, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu, 501-1196, Japan mnakamura@gifu-pu. ac. jp
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2
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Georgolopoulos G, Psatha N, Iwata M, Nishida A, Som T, Yiangou M, Stamatoyannopoulos JA, Vierstra J. Discrete regulatory modules instruct hematopoietic lineage commitment and differentiation. Nat Commun 2021; 12:6790. [PMID: 34815405 PMCID: PMC8611072 DOI: 10.1038/s41467-021-27159-x] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 10/20/2021] [Indexed: 11/08/2022] Open
Abstract
Lineage commitment and differentiation is driven by the concerted action of master transcriptional regulators at their target chromatin sites. Multiple efforts have characterized the key transcription factors (TFs) that determine the various hematopoietic lineages. However, the temporal interactions between individual TFs and their chromatin targets during differentiation and how these interactions dictate lineage commitment remains poorly understood. Here we perform dense, daily, temporal profiling of chromatin accessibility (DNase I-seq) and gene expression changes (total RNA-seq) along ex vivo human erythropoiesis to comprehensively define developmentally regulated DNase I hypersensitive sites (DHSs) and transcripts. We link both distal DHSs to their target gene promoters and individual TFs to their target DHSs, revealing that the regulatory landscape is organized in distinct sequential regulatory modules that regulate lineage restriction and maturation. Finally, direct comparison of transcriptional dynamics (bulk and single-cell) and lineage potential between erythropoiesis and megakaryopoiesis uncovers differential fate commitment dynamics between the two lineages as they exit the stem and progenitor stage. Collectively, these data provide insights into the temporally regulated synergy of the cis- and the trans-regulatory components underlying hematopoietic lineage commitment and differentiation.
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Affiliation(s)
- Grigorios Georgolopoulos
- Altius Institute for Biomedical Sciences, Seattle, WA, USA.
- Department of Genetics, Development & Molecular Biology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece.
| | | | - Mineo Iwata
- Altius Institute for Biomedical Sciences, Seattle, WA, USA
| | - Andrew Nishida
- Altius Institute for Biomedical Sciences, Seattle, WA, USA
| | - Tannishtha Som
- Altius Institute for Biomedical Sciences, Seattle, WA, USA
| | - Minas Yiangou
- Department of Genetics, Development & Molecular Biology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - John A Stamatoyannopoulos
- Altius Institute for Biomedical Sciences, Seattle, WA, USA
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
- Division of Oncology, Department of Medicine, University of Washington, Seattle, WA, USA
| | - Jeff Vierstra
- Altius Institute for Biomedical Sciences, Seattle, WA, USA.
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Hayashi K, Fukuyasu-Matsuo S, Inoue T, Fujiwara M, Asai Y, Iwata M, Suzuki S. Effects of cyclic stretching exercise on long-lasting hyperalgesia, joint contracture, and muscle injury following cast immobilization in rats. Physiol Res 2020; 69:861-870. [PMID: 32901491 DOI: 10.33549/physiolres.934437] [Citation(s) in RCA: 1] [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: 12/16/2022] Open
Abstract
The effects of exercise on mechanical hyperalgesia, joint contracture, and muscle injury resulting from immobilization are not completely understood. This study aimed to investigate the effects of cyclic stretching on these parameters in a rat model of chronic post-cast pain (CPCP). Seventeen 8-week-old Wistar rats were randomly assigned to (1) control group, (2) immobilization (CPCP) group, or (3) immobilization and stretching exercise (CPCP+STR) group. In the CPCP and CPCP+STR groups, both hindlimbs of each rat were immobilized in full plantar flexion with a plaster cast for a 4-week period. In the CPCP+STR group, cyclic stretching exercise was performed 6 days/week for 2 weeks, beginning immediately after cast removal prior to reloading. Although mechanical hyperalgesia in the plantar skin and calf muscle, ankle joint contracture, and gastrocnemius muscle injury were observed in both immobilized groups, these changes were significantly less severe in the CPCP+STR group than in the CPCP group. These results clearly demonstrate the beneficial effect of cyclic stretching exercises on widespread mechanical hyperalgesia, joint contracture, and muscle injury in a rat model of CPCP.
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Affiliation(s)
- K Hayashi
- Multidisciplinary Pain Center, Aichi Medical University, Nagakute, Japan, Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan.
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Ohtake H, Ishii J, Nishimura H, Kawai H, Muramatsu T, Harada M, Motoyama S, Watanabe E, Ozaki Y, Iwata M. Prospective validation of 0-hour/1-hour algorithm using high-sensitivity cardiac troponin I in Japanese patients presenting to emergency department. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
The diagnostic performance of 0-hour/1-hour algorithm using high-sensitivity cardiac troponin I (hsTnI) for non-ST-segment elevation myocardial infarction (NSTEMI) has not been evaluated in an Asian population.
Purpose
We aimed to prospectively validate the 0-hour/1-hour algorithm using hsTnI in a Japanese population.
Method
We enrolled 754 Japanese patients (mean age of 70 years, 395 men) presenting to our emergency department with symptoms suggestive of NSTEMI. The hsTnI concentration was measured using the Siemens ADVIA Centaur hsTnI assay at presentation and after 1 hour. Patients were divided into three groups according to the algorithm: hsTnI below 3 ng/L (only applicable if chest pain onset >3 hours) or below 6 ng/L and delta 1 hour below 3 ng/L were the “rule-out” group; hsTnI at least 120 ng/L or delta 1 hour at least 12 ng/L were in the “rule-in” group; the remaining patients were classified as the “observe” group. Based on the Fourth Universal Definition of Myocardial Infarction, the final diagnosis was adjudicated by 2 independent cardiologists using all available information, including coronary angiography, coronary computed tomography, and follow-up data. Safety of rule-out was quantified by the negative predictive value (NPV) for NSTEMI, accuracy of rule-in by the positive predictive value (PPV), and overall efficacy by the proportion of patients triaged towards rule-out or rule-in within 1 hour.
Results
Prevalence of NSTEMI was 6.5%. The safety of rule-out (NPV 100%), accuracy of rule-in (PPV 26%), and overall efficacy (54%) were shown in Figure.
Conclusion
The 0-hour/1-hour algorithm using hsTnI is very safe and effective in triaging Japanese patients with suspected NSTEMI.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- H Ohtake
- Fujita Health University, Toyoake, Japan
| | - J Ishii
- Fujita Health University, Toyoake, Japan
| | | | - H Kawai
- Fujita Health University, Toyoake, Japan
| | | | - M Harada
- Fujita Health University, Toyoake, Japan
| | - S Motoyama
- Fujita Health University, Toyoake, Japan
| | - E Watanabe
- Fujita Health University, Toyoake, Japan
| | - Y Ozaki
- Fujita Health University, Toyoake, Japan
| | - M Iwata
- Fujita Health University, Toyoake, Japan
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Iwata M, Nakajima S, Tie D, Kabashima K. 408 Skin colonized Staphylococcus aureus exacerbates the inflammation of murine irritant contact dermatitis via modulating innate immune pathways. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.410] [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: 10/26/2022]
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A Masengi KW, Mandagi IF, Manu L, Silooy F, Labaro IL, Masengi AWR, Sebua N, Masengi EIKG, Pinontoan B, Hutabarat Y, Hukom F, Iwata M, Abe Y, Sato Y, Kimura R, Yamahira K. Study on existence of the fisheries resources abundance by using environmental deoxyribonucleic acid (e-DNA) approach at fishing grounds in the Sulawesi Sea, Indonesia. ACTA ACUST UNITED AC 2019. [DOI: 10.1088/1757-899x/567/1/012026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Georgolopoulos G, Iwata M, Psatha N, Yiangou M, Vierstra J. Unbiased phenotypic identification of functionally distinct hematopoietic progenitors. ACTA ACUST UNITED AC 2019; 26:4. [PMID: 31360678 PMCID: PMC6639971 DOI: 10.1186/s40709-019-0097-7] [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: 05/16/2019] [Accepted: 07/06/2019] [Indexed: 12/14/2022]
Abstract
Background Hematopoiesis is a model-system for studying cellular development and differentiation. Phenotypic and functional characterization of hematopoietic progenitors has significantly aided our understanding of the mechanisms that govern fate choice, lineage specification and maturity. Methods for progenitor isolation have historically relied on complex flow-cytometric strategies based on nested, arbitrary gates within defined panels of immunophenotypic markers. The resulted populations are then functionally assessed, although functional homogeneity or absolute linkage between function and phenotype is not always achieved, thus distorting our view on progenitor biology. Method In this study, we present a protocol for unbiased phenotypic identification and functional characterization which combines index sorting and clonogenic assessment of individual progenitor cells. Single-cells are plated into custom media allowing multiple hematopoietic fates to emerge and are allowed to give rise to unilineage colonies or mixed. After colony identification, lineage potential is assigned to each progenitor and finally the indexed phenotype of the initial cell is recalled and a phenotype is assigned to each functional output. Conclusions Our approach overcomes the limitations of the current protocols expanding beyond the established cell-surface marker panels and abolishing the need for nested gating. Using this method we were able to resolve the relationships of myeloid progenitors according to the revised model of hematopoiesis, as well as identify a novel marker for erythroid progenitors. Finally, this protocol can be applied to the characterization of any progenitor cell with measurable function. Electronic supplementary material The online version of this article (10.1186/s40709-019-0097-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Grigorios Georgolopoulos
- 1Altius Institute for Biomedical Sciences, Seattle, WA 98121 USA.,2Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece
| | - Mineo Iwata
- 1Altius Institute for Biomedical Sciences, Seattle, WA 98121 USA
| | - Nikoletta Psatha
- 1Altius Institute for Biomedical Sciences, Seattle, WA 98121 USA
| | - Minas Yiangou
- 2Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece
| | - Jeff Vierstra
- 1Altius Institute for Biomedical Sciences, Seattle, WA 98121 USA
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8
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Iwata M, Kasai H. A case of calcium pyrophosphate dihydrate crystal deposition disease suspected the tumor of temporomandibular joint. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.858] [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: 10/26/2022]
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9
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Yabuwaki K, Iwata M, Ono K. Influence of environmental factors on well-being and care burden of elderly family caregivers: a bayesian structural equation modeling approach. Ann Phys Rehabil Med 2018. [DOI: 10.1016/j.rehab.2018.05.1247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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10
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Yamazaki K, Yasui H, Yamaguchi K, Kagawa Y, Kuboki Y, Yoshino T, Gamoh M, Komatsu Y, Satake H, Goto M, Tanioka H, Oki E, Kotaka M, Makiyama A, Denda T, Soeda J, Shibya K, Iwata M, Oba K, Kato T. A phase I/II study of panitumumab combined with TAS-102 in patients (pts) with RAS wild-type (wt) metastatic colorectal cancer (mCRC) refractory to standard chemotherapy: APOLLON study. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.252] [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: 11/13/2022] Open
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11
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Nishida S, Inagaki R, Furukawa S, Iwata M, Suzuki J, Ito Y, Yasuda T. Selegiline hydrochloride (SEL) inhibits the uptake of 3 meta–iodobenzylguanidine (MIBG) and influences the result of MIBG myocardial scintigraphy in patients with parkinsonism. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1664] [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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12
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Iwata M. Dawn of the modern neurology in Japan. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.149] [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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13
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Suzuki J, Inagaki R, Furukawa S, Iwata M, Nakai N, Nishida S, Ito Y. Efficacy of prehospital stroke scale including atrial fibrillation (Topspin) –10 years experiences. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2829] [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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14
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Uchiyama Y, Iwata M, Hashida H, Kitagawa K. Silent basal ganglionic infarcts and white matter lesions; which is more responsible for the clinical feautures of Alzheimer's daisease? J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2895] [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: 11/16/2022]
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15
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Motomura C, Matsuzaki H, Ono R, Iwata M, Okabe K, Akamine Y, Wakatsuki M, Murakami Y, Taba N, Odajima H. Aspirin is an enhancing factor for food-dependent exercise-induced anaphylaxis in children. Clin Exp Allergy 2017; 47:1497-1500. [PMID: 28892197 DOI: 10.1111/cea.13026] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- C Motomura
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - H Matsuzaki
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - R Ono
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - M Iwata
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - K Okabe
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - Y Akamine
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - M Wakatsuki
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - Y Murakami
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - N Taba
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - H Odajima
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
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16
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Liu YW, Iwata M, Minami E, Abrams K, Torok-Storb B. A CLONAL POPULATION OF ALLOGENEIC BONE MARROW FIBROBLASTS INDIRECTLY MITIGATES DAMAGE IN MYOCARDIAL INFARCTION. J Am Coll Cardiol 2017. [DOI: 10.1016/s0735-1097(17)34463-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Fernandes S, Chong JJH, Paige SL, Iwata M, Torok-Storb B, Keller G, Reinecke H, Murry CE. Comparison of Human Embryonic Stem Cell-Derived Cardiomyocytes, Cardiovascular Progenitors, and Bone Marrow Mononuclear Cells for Cardiac Repair. Stem Cell Reports 2016; 5:753-762. [PMID: 26607951 PMCID: PMC4649260 DOI: 10.1016/j.stemcr.2015.09.011] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 09/14/2015] [Accepted: 09/15/2015] [Indexed: 01/04/2023] Open
Abstract
Cardiomyocytes derived from human embryonic stem cells (hESC-CMs) can improve the contractility of injured hearts. We hypothesized that mesodermal cardiovascular progenitors (hESC-CVPs), capable of generating vascular cells in addition to cardiomyocytes, would provide superior repair by contributing to multiple components of myocardium. We performed a head-to-head comparison of hESC-CMs and hESC-CVPs and compared these with the most commonly used clinical cell type, human bone marrow mononuclear cells (hBM-MNCs). In a nude rat model of myocardial infarction, hESC-CMs and hESC-CVPs generated comparable grafts. Both similarly improved systolic function and ventricular dilation. Furthermore, only rare human vessels formed from hESC-CVPs. hBM-MNCs attenuated ventricular dilation and enhanced host vascularization without engrafting long-term or improving contractility. Thus, hESC-CMs and CVPs show similar efficacy for cardiac repair, and both are more efficient than hBM-MNCs. However, hESC-CVPs do not form larger grafts or more significant numbers of human vessels in the infarcted heart. Transplantation of hBM-MNCs can halt the negative remodeling of the infarcted heart Both hESC-derived cardiovascular progenitors and definitive cardiomyocytes improve contractility hBM-MNCs lead to greater vessel number than hESC-derived cells
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Affiliation(s)
- Sarah Fernandes
- Center for Cardiovascular Biology, University of Washington, Seattle, WA 98109, USA; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA; Department of Pathology, University of Washington, Seattle, WA 98109, USA
| | - James J H Chong
- Center for Cardiovascular Biology, University of Washington, Seattle, WA 98109, USA; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA; Department of Pathology, University of Washington, Seattle, WA 98109, USA; School of Medicine, University of Sydney, Sydney, NSW 2006, Australia; Westmead Millennium Institute for Medical Research, University of Sydney, Sydney, NSW 2145, Australia
| | - Sharon L Paige
- Center for Cardiovascular Biology, University of Washington, Seattle, WA 98109, USA; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA; Department of Pathology, University of Washington, Seattle, WA 98109, USA
| | - Mineo Iwata
- Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | | | - Gordon Keller
- McEwen Centre for Regenerative Medicine, Ontario Cancer Institute, Toronto, ON M5G 2M9, Canada
| | - Hans Reinecke
- Center for Cardiovascular Biology, University of Washington, Seattle, WA 98109, USA; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA; Department of Pathology, University of Washington, Seattle, WA 98109, USA
| | - Charles E Murry
- Center for Cardiovascular Biology, University of Washington, Seattle, WA 98109, USA; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA; Department of Pathology, University of Washington, Seattle, WA 98109, USA; Department of Bioengineering, University of Washington, Seattle, WA 98109, USA; Department of Medicine/Cardiology, University of Washington, Seattle, WA 98109, USA.
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Yokoe I, Kobayashi H, Nishiwaki A, Sugiyama K, Nagasawa Y, Karasawa H, Iwata M, Nozaki T, Ikumi N, Inomata H, Shiraiwa H, Kitamura N, Takei M. FRI0204 Effect of Tocilizumab Treatment on QTc Interval in Patients with Rheumatoid Arthritis without Cardiac Symptoms. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.4032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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19
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Nishiwaki A, Kobayashi H, Nagasawa Y, Sugiyama K, Ikumi N, Nozaki T, Inomata H, Karasawa H, Shiraiwa H, Iwata M, Kitamura N, Takei M. FRI0119 The Association between QTc Interval and Myocardial Abnormalities in Rheumatoid Arthritis Patients without Cardiac Symptoms, by Assessed Using Cardiac Magnetic Resonance Imaging. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.3187] [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: 11/03/2022]
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20
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Sugiyama K, Kobayashi H, Kobayashi Y, Nagasawa Y, Ikumi N, Nozaki T, Inomata H, Shiraiwa H, Karasawa H, Iwata M, Kitamura N, Matsukawa Y, Takei M. THU0337 Raynaud Phenomenon Is Associated with Myocardial Fibrosis in Primary Sjögren Syndrome, Assessed by A Cardiac Magnetic Resonance Approach: A Prospective Pilot Study at A Single Center. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2327] [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: 11/03/2022]
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Urushihara D, Komabuchi M, Ishizawa N, Iwata M, Fukuda K, Asaka T. B23-O-03Observation of the crystal structure and the domains in the layered bismuth titanate BÌ 4TÌ 3O 12. Microscopy (Oxf) 2015. [DOI: 10.1093/jmicro/dfv161] [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: 11/13/2022] Open
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23
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Sugiyama K, Kobayashi H, Kobayashi Y, Nagasawa Y, Ikumi N, Nozaki T, Inomata H, Shiraiwa H, Karasawa H, Kitamura N, Iwata M, Matsukawa Y, Takei M. FRI0472 Detection of Left Ventricular Morphology and Myocardial Abnormalities Using Contrast Cardiac Magnetic Resonance Imaging at 3.0 Tesla in Systemic Sclerosis Without Cardiac Manifestations. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.3994] [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: 11/04/2022]
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Sasaki T, Iwata M, Yamato M, Takeda Y, Imamura Y, Hayashi T. Further characterization of basement membrane-associated collagen in comparison with type IV collagen alpha-1-chain in the extracts of human placenta with monoclonal antibodies. Contrib Nephrol 2015; 107:64-9. [PMID: 8004976 DOI: 10.1159/000422962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- T Sasaki
- Department of Chemistry, College of Arts and Sciences, University of Tokyo, Japan
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Iwata M, Torok-Storb B, Wayner EA, Carter WG. CDCP1 identifies a CD146 negative subset of marrow fibroblasts involved with cytokine production. PLoS One 2014; 9:e109304. [PMID: 25275584 PMCID: PMC4183599 DOI: 10.1371/journal.pone.0109304] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 09/10/2014] [Indexed: 01/15/2023] Open
Abstract
In vitro expanded bone marrow stromal cells contain at least two populations of fibroblasts, a CD146/MCAM positive population, previously reported to be critical for establishing the stem cell niche and a CD146-negative population that expresses CUB domain-containing protein 1 (CDCP1)/CD318. Immunohistochemistry of marrow biopsies shows that clusters of CDCP1+ cells are present in discrete areas distinct from areas of fibroblasts expressing CD146. Using a stromal cell line, HS5, which approximates primary CDCP1+ stromal cells, we show that binding of an activating antibody against CDCP1 results in tyrosine-phosphorylation of CDCP1, paralleled by phosphorylation of Src Family Kinases (SFKs) Protein Kinase C delta (PKC-δ). When CDCP1 expression is knocked-down by siRNA, the expression and secretion of myelopoietic cytokines is increased. These data suggest CDCP1 expression can be used to identify a subset of marrow fibroblasts functionally distinct from CD146+ fibroblasts. Furthermore the CDCP1 protein may contribute to the defining function of these cells by regulating cytokine expression.
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Affiliation(s)
- Mineo Iwata
- Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- * E-mail:
| | - Beverly Torok-Storb
- Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Elizabeth A. Wayner
- Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - William G. Carter
- Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
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Matsuzaki H, Iwata M, Miyamoto T, Terashige T, Iwano K, Takaishi S, Takamura M, Kumagai S, Yamashita M, Takahashi R, Wakabayashi Y, Okamoto H. Excitation-photon-energy selectivity of photoconversions in halogen-bridged Pd-chain compounds: Mott insulator to metal or charge-density-wave state. Phys Rev Lett 2014; 113:096403. [PMID: 25215998 DOI: 10.1103/physrevlett.113.096403] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Indexed: 06/03/2023]
Abstract
Ultrafast photoinduced transitions of a one-dimensional Mott insulator into two distinct electronic phases, metal and charge-density-wave (CDW) state, were achieved in a bromine-bridged Pd-chain compound [Pd(en)2Br](C5-Y)2H2O (en=ethylenediamine and C5-Y=dialkylsulfosuccinate), by selecting the photon energy of a femtosecond excitation pulse. For the resonant excitation of the Mott-gap transition, excitonic states are generated and converted to one-dimensional CDW domains. For the higher-energy excitation, free electron and hole carriers are produced, giving rise to a transition of the Mott insulator to a metal. Such selectivity in photoconversions by the choice of initial photoexcited states opens a new possibility for the developments of advanced optical switching and memory functions.
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Affiliation(s)
- H Matsuzaki
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - M Iwata
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - T Miyamoto
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - T Terashige
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - K Iwano
- Institute of Materials Structure Science, Graduate University for Advanced Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - S Takaishi
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - M Takamura
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - S Kumagai
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - M Yamashita
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - R Takahashi
- Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - Y Wakabayashi
- Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - H Okamoto
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
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Yokota-Nakatsuma A, Takeuchi H, Ohoka Y, Kato C, Song SY, Hoshino T, Yagita H, Ohteki T, Iwata M. Retinoic acid prevents mesenteric lymph node dendritic cells from inducing IL-13-producing inflammatory Th2 cells. Mucosal Immunol 2014; 7:786-801. [PMID: 24220301 DOI: 10.1038/mi.2013.96] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Accepted: 10/12/2013] [Indexed: 02/04/2023]
Abstract
The vitamin A (VA) metabolite retinoic acid (RA) affects the properties of T cells and dendritic cells (DCs). In VA-deficient mice, we observed that mesenteric lymph node (MLN)-DCs induce a distinct inflammatory T helper type 2 (Th2)-cell subset that particularly produces high levels of interleukin (IL)-13 and tumor necrosis factor-α (TNF-α). This subset expressed homing receptors for skin and inflammatory sites, and was mainly induced by B220(-)CD8α(-)CD11b(+)CD103(-) MLN-DCs in an IL-6- and OX40 ligand-dependent manner, whereas RA inhibited this induction. The corresponding MLN-DC subset of VA-sufficient mice induced a similar T-cell subset in the presence of RA receptor antagonists. IL-6 induced this subset differentiation from naive CD4(+) T cells upon activation with antibodies against CD3 and CD28. Transforming growth factor-β inhibited this induction, and reciprocally enhanced Th17 induction. Treatment with an agonistic anti-OX40 antibody and normal MLN-DCs enhanced the induction of general inflammatory Th2 cells. In VA-deficient mice, proximal colon epithelial cells produced TNF-α that may have enhanced OX40 ligand expression in MLN-DCs. The repeated oral administrations of a T cell-dependent antigen primed VA-deficient mice for IL-13-dependent strong immunoglobulin G1 (IgG1) responses and IgE responses that caused skin allergy. These results suggest that RA inhibits allergic responses to oral antigens by preventing MLN-DCs from inducing IL-13-producing inflammatory Th2 cells.
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Affiliation(s)
- A Yokota-Nakatsuma
- 1] Laboratory of Immunology, Kagawa School of Pharmaceutical Sciences, Tokushima Bunri University, Kagawa, Japan [2] JST, CREST, Tokyo, Japan
| | - H Takeuchi
- 1] Laboratory of Immunology, Kagawa School of Pharmaceutical Sciences, Tokushima Bunri University, Kagawa, Japan [2] JST, CREST, Tokyo, Japan
| | - Y Ohoka
- 1] Laboratory of Immunology, Kagawa School of Pharmaceutical Sciences, Tokushima Bunri University, Kagawa, Japan [2] JST, CREST, Tokyo, Japan
| | - C Kato
- Institute of Neuroscience, Tokushima Bunri University, Kagawa, Japan
| | - S-Y Song
- 1] JST, CREST, Tokyo, Japan [2] Institute of Neuroscience, Tokushima Bunri University, Kagawa, Japan
| | - T Hoshino
- Department of Medicine, Kurume University School of Medicine, Fukuoka, Japan
| | - H Yagita
- Department of Immunology, Juntendo University School of Medicine, Tokyo, Japan
| | - T Ohteki
- 1] JST, CREST, Tokyo, Japan [2] Department of Biodefense Research, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - M Iwata
- 1] Laboratory of Immunology, Kagawa School of Pharmaceutical Sciences, Tokushima Bunri University, Kagawa, Japan [2] JST, CREST, Tokyo, Japan
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Inomata H, Kobayashi H, Kobayashi Y, Ikumi N, Yokoe I, Nagasawa Y, Sugiyama K, Nozaki T, Shiraiwa H, Kitamura N, Iwata M, Takei M. AB0321 IL-6 Blockade Reduces Circulating N-Terminal Pro-Brain Natriuretic Peptide Levels in Patients with Active Rheumatoid Arthritis. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.2189] [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: 11/03/2022]
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Ikumi N, Inomata H, Nagasawa Y, Sugiyama K, Nozaki T, Yokoe I, Shiraiwa H, Karasawa H, Kitamura N, Iwata M, Matsukawa Y, Kobayashi H, Kobayashi Y, Takei M. FRI0437 How do we Treat Patients with Focus Score ≥1, but not Consistent with the New American College of Rheumatology Classification Criteria for SjÖGren's Syndrome? Evaluation from Study in Japanese Patients. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.2684] [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: 11/04/2022]
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Iwata M, Sandstrom RS, Delrow JJ, Stamatoyannopoulos JA, Torok-Storb B. Functionally and phenotypically distinct subpopulations of marrow stromal cells are fibroblast in origin and induce different fates in peripheral blood monocytes. Stem Cells Dev 2013; 23:729-40. [PMID: 24131213 DOI: 10.1089/scd.2013.0300] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Marrow stromal cells constitute a heterogeneous population of cells, typically isolated after expansion in culture. In vivo, stromal cells often exist in close proximity or in direct contact with monocyte-derived macrophages, yet their interaction with monocytes is largely unexplored. In this report, isolated CD146(+) and CD146(-) stromal cells, as well as immortalized cell lines representative of each (designated HS27a and HS5, respectively), were shown by global DNase I hypersensitive site mapping and principal coordinate analysis to have a lineage association with marrow fibroblasts. Gene expression profiles generated for the CD146(+) and CD146(-) cell lines indicate significant differences in their respective transcriptomes, which translates into differences in secreted factors. Consequently, the conditioned media (CM) from these two populations induce different fates in peripheral blood monocytes. Monocytes incubated in CD146(+) CM acquire a tissue macrophage phenotype, whereas monocytes incubated in CM from CD146(-) cells express markers associated with pre-dendritic cells. Importantly, when CD14(+) monocytes are cultured in contact with the CD146(+) cells, the combined cell populations, assayed as a unit, show increased levels of transcripts associated with organismal development and hematopoietic regulation. In contrast, the gene expression profile from cocultures of monocytes and CD146(-) cells does not differ from that obtained when monocytes are cultured with CD146(-) CM. These in vitro results show that the CD146(+) marrow stromal cells together with monocytes increase the expression of genes relevant to hematopoietic regulation. In vivo relevance of these data is suggested by immunohistochemistry of marrow biopsies showing juxtaposed CD146(+) cells and CD68(+) cells associated with these upregulated proteins.
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Affiliation(s)
- Mineo Iwata
- 1 Fred Hutchinson Cancer Research Center , Seattle, Washington
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Kobayashi Y, Ando Y, Nishiura M, Kishizawa H, Iwata M, Matake N, Tomida K. Recent Progress of SOFC Combined Cycle System with Segmented-In-Series Tubular Type Cell Stack at MHI. ACTA ACUST UNITED AC 2013. [DOI: 10.1149/05701.0053ecst] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Inada S, Ono T, Shibata N, Iwata M, Haraguchi R, Ashihara T, Abe A, Ikeda T, Mitsui K, Boyett M, Dobrzynski H, Nakazawa K. Simulation study of ventricular rate control therapy during atrial fibrillation using one-dimensional cable model with two conduction pathways. J Electrocardiol 2013. [DOI: 10.1016/j.jelectrocard.2013.05.080] [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: 11/30/2022]
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33
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Chong JJH, Reinecke H, Iwata M, Torok-Storb B, Stempien-Otero A, Murry CE. Progenitor cells identified by PDGFR-alpha expression in the developing and diseased human heart. Stem Cells Dev 2013; 22:1932-43. [PMID: 23391309 DOI: 10.1089/scd.2012.0542] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Platelet-derived growth factors (PDGFs) and their tyrosine kinase receptors play instrumental roles in embryonic organogenesis and diseases of adult organs. In particular, platelet-derived growth factor receptor-alpha (PDGFRα) is expressed by multipotent cardiovascular progenitors in mouse and human embryonic stem cell systems. Although cardiac PDGFRα expression has been studied in multiple species, little is known about its expression in the human heart. Using immunofluorescence, we analyzed PDGFRα expression in both human fetal and diseased adult hearts, finding strong expression in the interstitial cells of the epicardium, myocardium, and endocardium, as well as the coronary smooth muscle. Only rare endothelial cells and cardiomyocytes expressed PDGFRα. This pattern was consistent for both the fetal and adult diseased hearts, although more PDGFRα+ cardiomyocytes were noted in the latter. In vitro differentiation assays were then performed on the PDGFRα+ cell fraction isolated from the cardiomyocyte-depleted human fetal hearts. Protocols previously reported to direct differentiation to a cardiomyocyte (5-azacytidine), smooth muscle (PDGF-BB), or endothelial cell fates (vascular endothelial growth factor [VEGF]) were used. Although no significant cardiomyocyte differentiation was observed, PDGFRα+ cells generated significant numbers of smooth muscle cells (smooth muscle-α-actin+ and smooth muscle myosin+) and endothelial cells (CD31+). These data suggest that a subfraction of the cardiac PDGFRα+ populations are progenitors contributing predominantly to the vascular and mesenchymal compartments of the human heart. It may be possible to control the fate of these progenitors to promote vascularization or limit fibrosis in the injured heart.
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Affiliation(s)
- James J H Chong
- Center for Cardiovascular Biology, University of Washington, Seattle, Washington 98109, USA
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Iwata M, Madtes DK, Abrams K, Lamm WJE, Glenny RW, Nash RA, Ramakrishnan A, Torok-Storb B. Late infusion of cloned marrow fibroblasts stimulates endogenous recovery from radiation-induced lung injury. PLoS One 2013; 8:e57179. [PMID: 23520463 PMCID: PMC3592849 DOI: 10.1371/journal.pone.0057179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Accepted: 01/18/2013] [Indexed: 11/30/2022] Open
Abstract
In the current study, we used a canine model of radiation-induced lung injury to test the effect of a single i.v. infusion of 10×106/kg of marrow fibroblasts on the progression of damage following 15 Gy exposure to the right lung. The fibroblasts, designated DS1 cells, are a cloned population of immortalized cells isolated from a primary culture of marrow stromal cells. DS1 cells were infused at week 5 post-irradiation when lung damage was evident by imaging with high-resolution computed tomography (CT). At 13 weeks post-irradiation we found that 4 out of 5 dogs receiving DS1 cells had significantly improved pulmonary function compared to 0 out of 5 control dogs (p = 0.047, Fisher’s Exact). Pulmonary function was measured as the single breath diffusion capacity-hematocrit (DLCO-Hct), the total inspiratory capacity (IC), and the total lung capacity (TLC), which differed significantly between control and DS1-treated dogs; p = 0.002, p = 0.005, and p = 0.004, respectively. The DS1-treated dogs also had less pneumonitis detected by CT imaging and an increased number of TTF-1 (thyroid transcription factor 1, NKX2-1) positive cells in the bronchioli and alveoli compared to control dogs. Endothelial-like progenitor cells (ELC) of host origin, detected by colony assays, were found in peripheral blood after DS1 cell infusion. ELC numbers peaked one day after infusion, and were not detectable by 7 days. These data suggest that infusion of marrow fibroblasts stimulates mobilization of ELC, which is associated with a reduction in otherwise progressive radiation-induced lung injury. We hypothesize that these two observations are related, specifically that circulating ELC contribute to increased angiogenesis, which facilitates endogenous lung repair.
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Affiliation(s)
- Mineo Iwata
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - David K. Madtes
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
| | - Kraig Abrams
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Wayne J. E. Lamm
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
| | - Robb W. Glenny
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
- Department of Physiology and Biophysics, University of Washington, Seattle, Washington, United States of America
| | - Richard A. Nash
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
| | - Aravind Ramakrishnan
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
| | - Beverly Torok-Storb
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- * E-mail:
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35
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Iwata M, Inoue S, Kawaguchi M, Furuya H. Effects of diazepam and flumazenil on forebrain ischaemia in a rat model of benzodiazepine tolerance. Br J Anaesth 2012; 109:935-42. [DOI: 10.1093/bja/aes340] [Citation(s) in RCA: 5] [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: 11/14/2022] Open
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Ota M, Fukami T, Arakawa M, Hayashi H, Suzuki T, Iwata M, Tomono K, Hidaka S. Examination of factors that delay the elution of acetaminophen from over-the-counter drugs. Pharmazie 2012; 67:1018-1025. [PMID: 23346767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The information on the stability of medications is important to secure their quality. There is, however, little information about the stability of medications which assume to be kept by patients and customers. We previously showed that a delay in drug release occurs in some over-the-counter (OTC) drugs following storage in a high temperature, high humidity environment. In this study we prepared model tablet formulations containing an active ingredient and excipients to investigate the cause of this delayed release. The results reveal that delayed release occurs in preparations compounded with acetaminophen (AA) as the active ingredient and erythritol (ET) and crospovidone (CP) as excipients. In addition, ET deliquesces in a high humidity environment, then incorporates other particles during room temperature storage to form an aggregate. SEM observations and micropore distribution measurements conducted on OTC tablets that exhibit delayed release revealed that the number of intraparticle pores decreased after storage under high temperature, high humidity conditions. Thus, the delayed release by these pharmaceutical product formulations may be due to a change in the micropore structure both on the surface and within the particles, thereby decreasing the solvent infiltration pathways leading to the interior of the preparation.
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Affiliation(s)
- M Ota
- Department of Pharmacy, School of Pharmacy, Nihon University, Chiba, Japan
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Okamoto K, Kodama K, Takase K, Nakamoto K, Coffey H, Selvaraj A, Smith P, Iwata M, Tsuruoka A. 307 Anti-tumor Activities of Lenvatinib Against RET Gene Fusion Driven Tumor Models. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)72105-6] [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: 11/24/2022]
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Kudo C, Naruishi K, Maeda H, Abiko Y, Hino T, Iwata M, Mitsuhashi C, Murakami S, Nagasawa T, Nagata T, Yoneda S, Nomura Y, Noguchi T, Numabe Y, Ogata Y, Sato T, Shimauchi H, Yamazaki K, Yoshimura A, Takashiba S. Assessment of the Plasma/Serum IgG Test to Screen for Periodontitis. J Dent Res 2012; 91:1190-5. [DOI: 10.1177/0022034512461796] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Chronic periodontitis is a silent infectious disease prevalent worldwide and affects lifestyle-related diseases. Therefore, efficient screening of patients is essential for general health. This study was performed to evaluate prospectively the diagnostic utility of a blood IgG antibody titer test against periodontal pathogens. Oral examination was performed, and IgG titers against periodontal pathogens were measured by ELISA in 1,387 individuals. The cut-off value of the IgG titer was determined in receiver operating characteristic curve analysis, and changes in periodontal clinical parameters and IgG titers by periodontal treatment were evaluated. The relationships between IgG titers and severity of periodontitis were analyzed. The best cut-off value of IgG titer against Porphyromonas gingivalis for screening periodontitis was 1.682. Both clinical parameters and IgG titers decreased significantly under periodontal treatment. IgG titers of periodontitis patients were significantly higher than those of healthy controls, especially in those with sites of probing pocket depth over 4 mm. Multiplied cut-off values were useful to select patients with severe periodontitis. A blood IgG antibody titer test for Porphyromonas gingivalis is useful to screen hitherto chronic periodontitis patients (ClinicalTrials.gov number NCT01658475).
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Affiliation(s)
- C. Kudo
- Department of Periodontics and Endodontics, Okayama University Hospital, Okayama, Japan
| | - K. Naruishi
- Department of Periodontics and Endodontics, Okayama University Hospital, Okayama, Japan
- currently, Division of Endodontology, Iwate Medical University, Department of Conservative Dentistry and Oral Rehabilitation, Iwate, Japan
| | - H. Maeda
- Department of Pathophysiology - Periodontal Science, Okayama, University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Y. Abiko
- Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - T. Hino
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan
| | - M. Iwata
- Toyota Motor Corporation, Tokyo/Aichi, Japan
| | | | - S. Murakami
- Department of Periodontology, Division of Oral Biology and Disease Control, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - T. Nagasawa
- Department of Hard Tissue Engineering, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
- currently, Department of Oral Rehabilitation, Division of Periodontology and Endodontology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - T. Nagata
- Department of Periodontology and Endodontology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - S. Yoneda
- Department of Periodontology and Endodontology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Y. Nomura
- Department of Translational Research, School of Dental Medicine, Tsurumi University, Kanagawa, Japan
| | - T. Noguchi
- Department of Periodontology, School of Dentistry, Aichi-Gakuin University, Aichi, Japan
| | - Y. Numabe
- Department of Periodontology, School of Life Dentistry at Tokyo, Nippon Dental University, Tokyo, Japan
| | - Y. Ogata
- Department of Periodontology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - T. Sato
- Department of Oral Health, School of Life Dentistry at Tokyo, Nippon Dental University, Tokyo, Japan
| | - H. Shimauchi
- Department of Oral Biology, Division of Periodontology and Endodontology, Tohoku University Graduate School of Dentistry, Miyagi, Japan
| | - K. Yamazaki
- Laboratory of Periodontology and Immunology, Department of Oral Health and Welfare, Niigata University Faculty of Dentistry, Niigata, Japan
| | - A. Yoshimura
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - S. Takashiba
- Department of Pathophysiology - Periodontal Science, Okayama, University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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Kobayashi H, Iwata M, Mitani H, Yamada T, Nakagome K, Kaneko K. Valproic acid improves the tolerance for the stress in learned helplessness rats. Neurosci Res 2012; 72:355-63. [PMID: 22240171 DOI: 10.1016/j.neures.2011.12.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2011] [Revised: 12/01/2011] [Accepted: 12/14/2011] [Indexed: 01/16/2023]
Abstract
In this study, we investigated whether previously stressed rats with learned helplessness (LH) paradigm could recover from depressive-like behavior four weeks after the exposure, and also whether chronic treatment with valproic acid (VPA) could prevent behavioral despair due to the second stress on days 54 in these animals. Four weeks after induction of LH, we confirmed behavioral remission in the previously stressed rats. Two-way analysis of variance (ANOVA) performed with two factors, pretreatment (LH or Control) and drug (VPA or Saline), revealed a significant main effect of the drug on immobility time in forced swimming test. Post hoc test showed a shorter immobility time in the LH+VPA group than in the LH+Saline group. Immunohistochemical study of synapsin I showed a significant effect of drug by pretreatment interaction on immunoreactivity of synapsin I in the hippocampus: its expression levels in the regions were higher in the LH+VPA group than in the LH+Saline group. These results suggest that VPA could prevent the reappearance of stress-induced depressive-like behaviors in the rats recovering from prior stress, and that the drug-induced presynaptic changes in the expression of synapsin I in the hippocampus of LH animals might be related to improved tolerance toward the stress.
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Affiliation(s)
- H Kobayashi
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago 683-8504, Japan.
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Imamura M, Iwata M, Maegawa H, Watada H, Hirose H, Tanaka Y, Tobe K, Kaku K, Kashiwagi A, Kawamori R, Nakamura Y, Maeda S. Genetic variants at CDC123/CAMK1D and SPRY2 are associated with susceptibility to type 2 diabetes in the Japanese population. Diabetologia 2011; 54:3071-7. [PMID: 21909839 DOI: 10.1007/s00125-011-2293-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Accepted: 07/29/2011] [Indexed: 01/08/2023]
Abstract
AIMS/HYPOTHESIS Recently, rs10906115 in CDC123/CAMK1D, rs1359790 near SPRY2, rs1436955 in C2CD4A/C2CD4B and rs10751301 in ODZ4 were identified as genetic risk variants for type 2 diabetes by a genome-wide association study in a Chinese population. The aim of the present study was to ascertain the role of these four variants in conferring susceptibility to type 2 diabetes in the Japanese population. METHODS We genotyped 11,530 Japanese individuals (8,552 type 2 diabetes cases, 2,978 controls) for the above single nucleotide polymorphisms (SNPs) and used logistic regression analysis to determine whether they were associated with type 2 diabetes. RESULTS In accordance with the findings in a Chinese population, rs10906115 A, rs1359790 C and rs1436955 G were found to be risk alleles. Both rs10906115 and rs1359790 were significantly associated with susceptibility to type 2 diabetes in our study (rs10906115 OR 1.15, 95% CI 1.08, 1.22; p = 6.10 × 10(-6); rs1359790 OR 1.14, 95% CI 1.06, 1.21; p = 2.24 × 10(-4)). Adjustment for age, sex and BMI had no significant effects on the association between these variants and the disease. We did not observe any significant associations between the SNPs and any metabolic traits, e.g. BMI, fasting plasma glucose (determined for 1,332 controls), HOMA of beta cell function (900 controls) and HOMA of insulin resistance (900 controls; p > 0.05). CONCLUSIONS/INTERPRETATION The SNPs rs10906115 A and rs1359790 C are significantly associated with susceptibility to type 2 diabetes in the Japanese population, confirming that these alleles are common susceptibility variants for type 2 diabetes in East Asian populations.
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Affiliation(s)
- M Imamura
- Laboratory for Endocrinology and Metabolism, RIKEN Center for Genomic Medicine, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
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Iwata M, Hidaka S, Ogisawa Y, Kamijyo H. Relapse and overcorrection in alveolar distraction osteogenesis for dental implant of mandible. Int J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.ijom.2011.07.972] [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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Shiraishi F, Egashira M, Iwata M, Sriyudthsak K, Hattori K. Highly reliable computation of dynamic sensitivities in metabolic reaction systems by a variable-step Taylor series method. ASIA-PAC J CHEM ENG 2011. [DOI: 10.1002/apj.630] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- F. Shiraishi
- Section of Bio-process Design, Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences; Kyushu University; 6-10-1, Hakozaki, Higashi-Ku Fukuoka Fukuoka 820-8581 Japan
| | - M. Egashira
- Section of Bio-process Design, Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences; Kyushu University; 6-10-1, Hakozaki, Higashi-Ku Fukuoka Fukuoka 820-8581 Japan
| | - M. Iwata
- Section of Bio-process Design, Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences; Kyushu University; 6-10-1, Hakozaki, Higashi-Ku Fukuoka Fukuoka 820-8581 Japan
| | - K. Sriyudthsak
- Section of Bio-process Design, Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences; Kyushu University; 6-10-1, Hakozaki, Higashi-Ku Fukuoka Fukuoka 820-8581 Japan
| | - K. Hattori
- Section of Bio-process Design, Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences; Kyushu University; 6-10-1, Hakozaki, Higashi-Ku Fukuoka Fukuoka 820-8581 Japan
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Kubota Y, Mizutani K, Maeda S, Seike K, Shinohara Y, Iwata M. UP-02.123 Pre-Biopsy PSA Kinetics in Prostate Cancer Screening: Analysis of Toyota Motor Corporation Employees. Urology 2011. [DOI: 10.1016/j.urology.2011.07.941] [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: 10/16/2022]
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Iwata M, Hidaka S, Shirakami K. O113. Effect of absorbable sealing materials and fibrin glue to wound on partial glossectomy. Oral Oncol 2011. [DOI: 10.1016/j.oraloncology.2011.06.224] [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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Kotani H, Kishi R, Mouri A, Sashio T, Shindo J, Shiraki A, Hiramatsu T, Iwata S, Taniguchi H, Nishiyama O, Iwata M, Suzuki R, Gonda H, Niwa T, Kondo M, Hasegawa Y, Kume H, Noda Y. Influence of leukotriene pathway polymorphisms on clinical responses to montelukast in Japanese patients with asthma. J Clin Pharm Ther 2011; 37:112-6. [PMID: 21385196 DOI: 10.1111/j.1365-2710.2011.01248.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
WHAT IS KNOWN AND OBJECTIVE Montelukast, a cysteinyl leukotriene receptor 1 antagonist, is safe and efficacious in patients with asthma. The mechanisms underlying the significant interpatient variability in response to montelukast are not clear but are believed to be, in part, because of genetic variability. METHODS To examine the associations between polymorphisms in candidate genes in the leukotriene pathway and outcomes in patients with asthma on montelukast for 4-8 weeks, we evaluated the changes in peak expiratory flow (PEF), forced expiratory volume in 1 s (FEV(1·0) ) and patients' subjective symptom before and after montelukast treatment. DNA was collected from 252 Japanese participants. RESULTS AND DISCUSSION Two single-nucleotide polymorphisms (SNPs) in the ALOX5 (rs2115819) and LTA4H (rs2660845) genes were successfully typed. There was no difference between members of the general population (n = 200) and patients (n = 52) in each genotype frequency. Significant associations were found between SNP genotypes in the LTA4H gene and changes in PEF and FEV(1·0) . The PEF and FEV(1·0) responses to montelukast in the A/A genotypes (n = 4) for the LTA4H SNP were significantly higher than those in the G allele carriers (A/G+G/G) (n = 17). WHAT IS NEW AND CONCLUSION Despite the small sample size, our results suggest that genetic variation in leukotriene pathway candidate genes contributes to variability in clinical responses to montelukast in Japanese patients with asthma.
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Affiliation(s)
- H Kotani
- Division of Clinical Sciences and Neuropsychopharmacology, Meijo University Graduate School of Pharmaceutical Sciences, Nagoya, Japan
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Ogita Y, Takahashi Y, Iwata M, Sasatsu M, Onishi H, Hashimoto S, Machida Y. Comparison of physical properties and drug-releasing characteristics of white petrolatums. Pharmazie 2010; 65:801-804. [PMID: 21155385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
White petrolatums of Japanese Pharmacopoeia grade and Sun white marketed as a cosmetic were characterized by measuring their physical properties and drug-releasing characteristics. White petrolatums of Japanese Pharmacopoeia grade available commercially in Japan were Perfecta, White 1S, Ultima, Snow, Snow V and Regent (Propeto). Penetrating stress, shear stress and spreading properties were measured as physical properties of the white petrolatums. The physical properties of white petrolatums varied, and Regent was the softest and the most spreadable ointment base. In vitro release test was performed using flow-through Franz diffusion cells. Fluorescein isothiocyanate and tetracycline hydrochloride were used as drug models. Their release characteristics varied among the tested white petrolatums, and Regent had the best release properties. Among the white petrolatums, with the exception of Regent, the release properties should depend on the distribution of drugs between white petrolatum and the receiver solution. Considerations of usability and characteristics of theprincipal agent are needed when choosing white petrolatums.
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Affiliation(s)
- Y Ogita
- Department of Pharmacy, Yokohama City University Medical Center, Yokohama, Japan
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Lee WS, Suzuki Y, Graves SS, Iwata M, Venkataraman GM, Mielcarek M, Peterson LJ, Ikehara S, Torok-Storb B, Storb R. Canine bone marrow-derived mesenchymal stromal cells suppress alloreactive lymphocyte proliferation in vitro but fail to enhance engraftment in canine bone marrow transplantation. Biol Blood Marrow Transplant 2010; 17:465-75. [PMID: 20457265 DOI: 10.1016/j.bbmt.2010.04.016] [Citation(s) in RCA: 37] [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] [Received: 02/25/2010] [Accepted: 04/30/2010] [Indexed: 02/06/2023]
Abstract
Stable mixed hematopoietic chimerism has been consistently established in dogs who were mildly immunosuppressed by 200 cGy of total body irradiation (TBI) before undergoing dog leukocyte antigen (DLA)-identical bone marrow (BM) transplantation and who received a brief course of immunosuppression with mycophenolate mofetil (28 days) and cyclosporine (35 days) after transplantation. However, when TBI was reduced from 200 to 100 cGy, grafts were nearly uniformly rejected within 3-12 weeks. Here, we asked whether stable engraftment could be accomplished after a suboptimal dose of 100 cGy TBI with host immunosuppression enhanced by donor-derived mesenchymal stromal cells (MSCs) given after transplantation. MSCs were cultured from BM cells and evaluated in vitro for antigen expression. They showed profound immunosuppressive properties in mixed lymphocyte reactions (MLRs) in a cell dose-dependent manner not restricted by DLA. MSC and lymphocyte contact was not required, indicating that immunosuppression was mediated by soluble factors. Prostaglandin E2 was increased in culture supernatant when MSCs were cocultured in MLRs. The addition of indomethacin restored lymphocyte proliferation in cultures containing MSCs. MSCs expressed CD10, CD13, CD29, CD44, CD73/SH-3, CD90/Thy-1, and CD106/VCAM-1. For in vivo studies, MSCs were injected on the day of BM grafting and on day 35, the day of discontinuation of posttransplantation cyclosporine. MSCs derived from the respective BM donors failed to avert BM graft rejection in 4 dogs who received DLA-identical grafts after nonmyeloablative conditioning with 100 cGy TBI in a time course not significantly different from that of control dogs not given MSCs. Although the MSCs displayed in vitro characteristics similar to those reported for MSCs from other species, their immunosuppressive qualities failed to sustain stable BM engraftment in vivo in this canine model.
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Affiliation(s)
- Won Sik Lee
- Transplantation Biology, Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
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LeBlanc BW, Iwata M, Mallon AP, Rupasinghe CN, Goebel DJ, Marshall J, Spaller MR, Saab CY. A cyclic peptide targeted against PSD-95 blocks central sensitization and attenuates thermal hyperalgesia. Neuroscience 2010; 167:490-500. [PMID: 20167266 DOI: 10.1016/j.neuroscience.2010.02.031] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Revised: 02/09/2010] [Accepted: 02/11/2010] [Indexed: 12/29/2022]
Abstract
Post-synaptic density protein PSD-95 is emerging as a valid target for modulating nociception in animal studies. Based on the key role of PSD-95 in neuronal plasticity and the maintenance of pain behavior, we predicted that CN2097, a peptide-based macrocycle of nine residues that binds to the PSD-95 Discs large, Zona occludens 1 (PDZ) domains of PSD-95, would interfere with physiologic phenomena in the spinal cord related to central sensitization. Furthermore, we tested whether spinal intrathecal injection of CN2097 attenuates thermal hyperalgesia in a rat model of sciatic neuropathy. Results demonstrate that spinal CN2097 reverses hyperexcitability of wide dynamic range (WDR) neurons in the dorsal horn of neuropathic rats and decreases their evoked responses to peripheral stimuli (brush, low caliber von Frey and pressure), whereas CN5125 ("negative control") has no effect. CN2097 also blocks C-fiber long-term potentiation (LTP) in the dorsal horn, which is linked to neuronal plasticity and central sensitization. At a molecular level, CN2097 attenuates the increase in phosphorylated p38 MAPK, a key intracellular signaling pathway in neuropathic pain. Moreover, spinal injection of CN2097 blocks thermal hyperalgesia in neuropathic rats. We conclude that CN2097 is a small molecule peptide with putative anti-nociceptive effects that modulates physiologic phenomena related to central sensitization under conditions of chronic pain.
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Affiliation(s)
- B W LeBlanc
- Department of Surgery, Rhode Island Hospital, Brown Alpert Medical School and Department of Neuroscience, Brown University, Providence, RI 02903, USA
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Yoshizawa H, Masuda Y, Kondo C, Momose M, Kusakabe K, Iwata M, Uchiyama S. Neural substrates for attention: A study on resting FDG-PET-neuropsychology correlation in normal subjects. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)72104-4] [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: 11/29/2022] Open
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Iwata M, Fukami T, Kawashima D, Sakai M, Furuishi T, Suzuki T, Tomono K, Ueda H. Effectiveness of mechanochemical treatment with cyclodextrins on increasing solubility of glimepiride. Pharmazie 2009; 64:390-394. [PMID: 19618676 DOI: 10.1691/ph.2009.9045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We investigated the enhancement of the solubility of glimepiride (GLM), a poorly water soluble anti-diabetes drug, by cogrinding it with various cyclodextrins (CDs) using a ball mill. The phase solubility profiles of GLM with beta-CD and its derivatives were classified as A(L)-type, indicating the formation of a 1 : 1 stoichiometric water-soluble complex. When GLM crystals were coground with beta-CD using a ball mill for 48 h, the aqueous solubility of GLM increased to approximately 250 microg/mL. The powder X-ray diffraction pattern showed that the peak intensity of crystalline GLM decreased after cogrinding. Endothermic peaks of around 208 degrees C, which were assigned to the fusion of GLM crystals, disappeared in the DSC measurement of the ground mixture. After cogrinding, two sharp peaks assigned to sulfonylurea and benzoyl carbonyl stretching bands varied to broaden the peak to around 1700 cm(-1) in the C=O stretching region. These results suggested the formation of a complex between GLM and beta-CD during cogrinding.
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Affiliation(s)
- M Iwata
- Sanofi-Aventis K.K, Tokyo, Japan
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