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Wu Y, Iwasaki K, Hashimoto Y. Induction of mesenchymal stem cell (MSC) differentiation from iPS cells using MSC medium. Dent Mater J 2024; 43:20-27. [PMID: 38008439 DOI: 10.4012/dmj.2023-130] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2023]
Abstract
Mesenchymal stem cells (MSCs) and induced pluripotent stem (iPS) cells have great potential as cell sources for tissue engineering and regenerative medicine. This study aimed to investigate whether iPS cells can be differentiated into MSCs using MSCGM, a commercially available MSC culture system. The cells were characterized by flow cytometry, immunostaining, and gene expression analyses. We also examined their potential to differentiate into osteoblasts and chondrocytes. Our results showed that iPS cells cultured in MSCGM (iPS-MSCGM) exhibited a fibroblast-like morphology and expressed CD73 and CD90 genes, as well as positive markers for CD73, CD90, and CD105. Moreover, iPS-MSCGM cells demonstrated the ability to differentiate into osteoblasts and chondrocytes in vitro. This study demonstrates a new and simple method for inducing the differentiation of iPS cells to MSCs using MSCGM.
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Affiliation(s)
- Yufan Wu
- Department of Biomaterials, Osaka Dental University
| | - Kengo Iwasaki
- Division of Creative and Integrated Medicine, Advanced Medical Research Center, Translational Research Institute for Medical Innovation (TRIMI), Osaka Dental University
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2
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Iwasaki K, Okazaki A. Medication-related osteonecrosis of the jaw leading to sepsis in a patient with rheumatoid arthritis: A case report and clinical implications. Clin Case Rep 2023; 11:e7588. [PMID: 37334335 PMCID: PMC10276238 DOI: 10.1002/ccr3.7588] [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: 03/09/2023] [Revised: 05/22/2023] [Accepted: 06/02/2023] [Indexed: 06/20/2023] Open
Abstract
Key Clinical Message Chronic use of bisphosphonates, in combination with immunosuppressive therapy, increases the risk of jaw osteonecrosis. When sepsis occurs in patients receiving bisphosphonate, osteonecrosis of the jaw should be considered a potential source of infection. Abstract Reports of medication-related osteonecrosis of the jaw (MRONJ) accompanied by sepsis are limited. A 75-year-old female patient with rheumatoid arthritis, receiving treatment with bisphosphonate and abatacept, developed sepsis secondary to MRONJ. When sepsis occurs in patients receiving bisphosphonate, osteonecrosis of the jaw should be considered a potential source of infection.
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Affiliation(s)
- K. Iwasaki
- Department of Internal MedicineKaga Medical CenterKagaJapan
- Department of Respiratory MedicineKanazawa University Graduate School of Medical SciencesKanazawaJapan
| | - A. Okazaki
- Department of Internal MedicineKaga Medical CenterKagaJapan
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3
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Sunartvanichkul T, Arayapisit T, Sangkhamanee SS, Chaweewannakorn C, Iwasaki K, Klaihmon P, Sritanaudomchai H. Stem cell-derived exosomes from human exfoliated deciduous teeth promote angiogenesis in hyperglycemic-induced human umbilical vein endothelial cells. J Appl Oral Sci 2023; 31:e20220427. [PMID: 37042872 PMCID: PMC10118382 DOI: 10.1590/1678-7757-2022-0427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 02/07/2023] [Indexed: 04/13/2023] Open
Abstract
OBJECTIVE To investigate the angiogenesis in human umbilical vein endothelial cells (HUVEC) under high glucose concentration, treated with exosomes derived from stem cells from human exfoliated deciduous teeth (SHED). METHODOLOGY SHED-derived exosomes were isolated by differential centrifugation and were characterized by nanoparticle tracking analysis, transmission electron microscopy, and flow cytometric assays. We conducted in vitro experiments to examine the angiogenesis in HUVEC under high glucose concentration. Cell Counting Kit-8, migration assay, tube formation assay, quantitative real-time PCR, and immunostaining were performed to study the role of SHED-derived exosomes in cell proliferation, migration, and angiogenic activities. RESULTS The characterization confirmed SHED-derived exosomes: size ranged from 60-150 nm with a mode of 134 nm, cup-shaped morphology, and stained positively for CD9, CD63, and CD81. SHED-exosome significantly enhanced the proliferation and migration of high glucose-treated HUVEC. A significant reduction was observed in tube formation and a weak CD31 staining compared to the untreated-hyperglycemic-induced group. Interestingly, exosome treatment improved tube formation qualitatively and demonstrated a significant increase in tube formation in the covered area, total branching points, total tube length, and total loop parameters. Moreover, SHED-exosome upregulates angiogenesis-related factors, including the GATA2 gene and CD31 protein. CONCLUSIONS Our data suggest that the use of SHED-derived exosomes potentially increases angiogenesis in HUVEC under hyperglycemic conditions, which includes increased cell proliferation, migration, tubular structures formation, GATA2 gene, and CD31 protein expression. SHED-exosome usage may provide a new treatment strategy for periodontal patients with diabetes mellitus.
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Affiliation(s)
| | - Tawepong Arayapisit
- Mahidol University, Faculty of Dentistry, Department of Anatomy, Bangkok, Thailand
| | | | | | - Kengo Iwasaki
- Osaka Dental University, Advanced Medical Research Center, Translational Research Institute for Medical Innovation, Osaka, Japan
| | - Phatchanat Klaihmon
- Mahidol University, Faculty of Medicine Siriraj Hospital, Siriraj Center of Excellence for Stem Cell Research, Bangkok, Thailand
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Minami T, Tokiyasu AO, Kohri H, Abe Y, Iwasaki K, Taguchi T, Oda K, Suzuki S, Asai T, Tanaka SJ, Isayama S, Kanasaki M, Kodaira S, Fukuda Y, Kuramitsu Y. Mass-resolved ion measurement by particle counting analysis for characterizing relativistic ion beams driven by lasers. Rev Sci Instrum 2022; 93:113530. [PMID: 36461420 DOI: 10.1063/5.0101872] [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: 06/03/2022] [Accepted: 09/09/2022] [Indexed: 06/17/2023]
Abstract
Particle counting analysis is a possible way to characterize GeV-scale, multi-species ions produced in laser-driven experiments. We present a multi-layered scintillation detector to differentiate multi-species ions of different masses and energies. The proposed detector concept offers potential advantages over conventional diagnostics in terms of (1) high sensitivity to GeV ions, (2) realtime analysis, and (3) the ability to differentiate ions with the same charge-to-mass ratio. A novel choice of multiple scintillators with different ion stopping powers results in a significant difference in energy deposition between the scintillators, allowing accurate particle identification in the GeV range. Here, we report a successful demonstration of particle identification for heavy ions, performed at the Heavy Ion Medical Accelerator in Chiba. In the experiment, the proposed detector setup showed the ability to differentiate particles with similar atomic numbers, such as C6+ and O8+ ions, and provided an excellent energy resolution of 0.41%-1.2% (including relativistic effect, 0.51%--1.6%).
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Affiliation(s)
- T Minami
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - A O Tokiyasu
- Research Center for Electron Photon Science, Tohoku University, Miyagi 982-0826, Japan
| | - H Kohri
- Research Center for Nuclear Physics, Osaka University, Osaka 567-0047, Japan
| | - Y Abe
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - K Iwasaki
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - T Taguchi
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - K Oda
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - S Suzuki
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - T Asai
- Kansai Photon Science Institute (KPSI), National Institutes for Quantum Science and Technology (QST), Kyoto 619-0215, Japan
| | - S J Tanaka
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - S Isayama
- Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - M Kanasaki
- Graduate School of Maritime Sciences, Kobe University, Hyogo 658-0022, Japan
| | - S Kodaira
- National Institute of Radiological Sciences (NIRS), National Institutes for Quantum Science and Technology (QST), Chiba 263-8555, Japan
| | - Y Fukuda
- Kansai Photon Science Institute (KPSI), National Institutes for Quantum Science and Technology (QST), Kyoto 619-0215, Japan
| | - Y Kuramitsu
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
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5
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Abe Y, Kohri H, Tokiyasu A, Minami T, Iwasaki K, Taguchi T, Asai T, Kanasaki M, Kodaira S, Fujioka S, Kuramitsu Y, Fukuda Y. A multi-stage scintillation counter for GeV-scale multi-species ion spectroscopy in laser-driven particle acceleration experiments. Rev Sci Instrum 2022; 93:063502. [PMID: 35778001 DOI: 10.1063/5.0078817] [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: 11/15/2021] [Accepted: 05/13/2022] [Indexed: 06/15/2023]
Abstract
Particle counting analysis (PCA) with a multi-stage scintillation detector shows a new perspective on angularly resolved spectral characterization of GeV-scale, multi-species ion beams produced by high-power lasers. The diagnosis provides a mass-dependent ion energy spectrum based on time-of-flight and pulse-height analysis of single particle events detected through repetitive experiments. With a novel arrangement of multiple scintillators with different ions stopping powers, PCA offers potential advantages over commonly used diagnostic instruments (CR-39, radiochromic films, Thomson parabola, etc.) in terms of coverage solid angle, detection efficiency for GeV-ions, and real-time analysis during the experiment. The basic detector unit was tested using 230-MeV proton beam from a synchrotron facility, where we demonstrated its potential ability to discriminate major ion species accelerated in laser-plasma experiments (i.e., protons, deuterons, carbon, and oxygen ions) with excellent energy and mass resolution. The proposed diagnostic concept would be essential for a better understanding of laser-driven particle acceleration, which paves the way toward all-optical compact accelerators for a range of applications.
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Affiliation(s)
- Y Abe
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - H Kohri
- Research Center for Nuclear Physics, Osaka University, Osaka 567-0047, Japan
| | - A Tokiyasu
- Research Center for Electron Photon Science, Tohoku University, Miyagi 982-0826, Japan
| | - T Minami
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - K Iwasaki
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - T Taguchi
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - T Asai
- Graduate School of Maritime Sciences, Kobe University, Kobe 658-0022, Japan
| | - M Kanasaki
- Graduate School of Maritime Sciences, Kobe University, Kobe 658-0022, Japan
| | - S Kodaira
- National Institute of Radiological Sciences (NIRS), National Institutes for Quantum and Radiological Science and Technology (QST), Chiba 263-8555, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - Y Kuramitsu
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - Y Fukuda
- Kansai Photon Science Institute (KPSI), National Institutes for Quantum and Radiological Science and Technology (QST), Kyoto 619-0215, Japan
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Watanabe O, Ko Y, Tsujii N, Takase Y, Ejiri A, Shinohara K, Peng Y, Iwasaki K, Yamada I, Yatomi G, Moeller C, Peng YK. Design of a finline antenna for current drive in TST-2. Fusion Engineering and Design 2022. [DOI: 10.1016/j.fusengdes.2022.113094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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7
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Iwasaki K, Peng Y, Kanda R, Umeda M, Ishikawa I. Stem Cell Transplantation and Cell-Free Treatment for Periodontal Regeneration. Int J Mol Sci 2022; 23:ijms23031011. [PMID: 35162935 PMCID: PMC8835344 DOI: 10.3390/ijms23031011] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 01/12/2022] [Accepted: 01/13/2022] [Indexed: 02/04/2023] Open
Abstract
Increasing attention has been paid to cell-based medicines. Many in vivo and in vitro studies have demonstrated the efficacy of stem cell transplantation for the regeneration of periodontal tissues over the past 20 years. Although positive evidence has accumulated regarding periodontal regeneration using stem cells, the exact mechanism of tissue regeneration is still largely unknown. This review outlines the practicality and emerging problems of stem cell transplantation therapy for periodontal regeneration. In addition, possible solutions to these problems and cell-free treatment are discussed.
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Affiliation(s)
- Kengo Iwasaki
- Institute of Dental Research, Osaka Dental University, Osaka 573-1121, Japan;
- Correspondence: ; Tel.: +81-72-864-3125
| | - Yihao Peng
- Department of Periodontology, Osaka Dental University, Osaka 573-1121, Japan; (Y.P.); (M.U.)
| | - Ryuhei Kanda
- Institute of Dental Research, Osaka Dental University, Osaka 573-1121, Japan;
| | - Makoto Umeda
- Department of Periodontology, Osaka Dental University, Osaka 573-1121, Japan; (Y.P.); (M.U.)
| | - Isao Ishikawa
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University, Tokyo 162-8666, Japan;
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Iwasaki K, Akazawa K, Nagata M, Komaki M, Peng Y, Umeda M, Watabe T, Morita I. Angiogenic Effects of Secreted Factors from Periodontal Ligament Stem Cells. Dent J (Basel) 2021; 9:dj9010009. [PMID: 33467531 PMCID: PMC7829795 DOI: 10.3390/dj9010009] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 12/01/2020] [Revised: 12/30/2020] [Accepted: 01/13/2021] [Indexed: 12/22/2022] Open
Abstract
Periodontal disease is a chronic inflammation of tooth-supporting tissues, and the destruction of these tissues results in tooth loss. Regeneration of periodontal tissues is the ultimate goal of periodontal treatment. We previously reported that transplantation of conditioned medium (CM) of periodontal ligament stem cells (PDLSCs) demonstrated the enhancement of periodontal tissue regeneration, compared to CM from fibroblasts (Fibroblast-CM). We hypothesized that the angiogenic effects of PDLSC-CM might participate in the enhanced wound healing of periodontal tissues. The aim of this study was to investigate the effect of PDLSC-CM on the functions of endothelial cells. PDLSCs were cultured from periodontal ligament tissues obtained from healthy volunteers. Human gingival epithelial cells, dermal fibroblasts, osteoblasts, and umbilical vein endothelial cells (HUVECs) were purchased from commercial sources. The functions of endothelial cells were examined using immunostaining of Ki67, observation of nuclear fragmentation and condensation (apoptosis), and network formation on Matrigel. Vascular endothelial cell growth factor (VEGF) level was measured using an ELISA kit. HUVECs demonstrated higher cell viability in PDLSC-CM when compared with those in Fibroblast-CM. HUVECs demonstrated a higher number of Ki67-positive cells and lower apoptosis cells in PDLSC-CM, compared to Fibroblast-CM. Additionally, HUVECs formed more capillary-like structures in PDLSC-CM than Fibroblast-CM. PDLSC-CM contained higher levels of angiogenic growth factor, VEGF, than Fibroblast-CM. Our results showed that PDLSC-CM increased cell viability, proliferation, and capillary formation of HUVECs compared to Fibroblast-CM, suggesting the angiogenic effects of PDLSC-CM, and the effect is a potential regenerative mechanism of periodontal tissues by PDLSC-CM.
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Affiliation(s)
- Kengo Iwasaki
- Institute of Dental Research, Osaka Dental University, Osaka 573-1121, Japan
- Department of Nanomedicine (DNP), Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8510, Japan;
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo 113-8510, Japan; (K.A.); (M.N.)
- Correspondence: ; Tel.: +81-72-864-3125
| | - Keiko Akazawa
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo 113-8510, Japan; (K.A.); (M.N.)
| | - Mizuki Nagata
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo 113-8510, Japan; (K.A.); (M.N.)
| | - Motohiro Komaki
- Department of Nanomedicine (DNP), Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8510, Japan;
- Yokohama Clinic, Kanagawa Dental University, Yokohama Clinic, Kanagawa, Yokohama 221-0835, Japan
| | - Yihao Peng
- Graduate School of Dentistry, Department of Periodontology, Osaka Dental University, Osaka 573-1121, Japan;
| | - Makoto Umeda
- Department of Periodontology, Osaka Dental University, Osaka 573-1121, Japan;
| | - Tetsuro Watabe
- Department of Biochemistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo 113-8510, Japan;
| | - Ikuo Morita
- Ochanomizu University, Tokyo 112-8610, Japan;
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Iwasaki K, Hamana H, Kishi H, Yamamoto T, Hiramitsu T, Okad M, Tomosugi T, Takeda A, Narumi S, Watarai Y, Miwa Y, Okumura M, Matsuoka Y, Horimi K, Muraguchi A, Kobayash T. The suppressive effect on CD4 T cell alloresponse against endothelial HLA-DR via PD-L1 induced by anti-A/B ligation. Clin Exp Immunol 2020; 202:249-261. [PMID: 32578199 DOI: 10.1111/cei.13482] [Citation(s) in RCA: 2] [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: 04/15/2020] [Revised: 05/27/2020] [Accepted: 06/15/2020] [Indexed: 11/27/2022] Open
Abstract
While donor-specific human leukocyte antigen (HLA) antibodies are a frequent cause for chronic antibody-mediated rejection in organ transplantation, this is not the case for antibodies targeting blood group antigens, as ABO-incompatible (ABO-I) organ transplantation has been associated with a favorable graft outcome. Here, we explored the role of CD4 T cell-mediated alloresponses against endothelial HLA-D-related (DR) in the presence of anti-HLA class I or anti-A/B antibodies. CD4 T cells, notably CD45RA-memory CD4 T cells, undergo extensive proliferation in response to endothelial HLA-DR. The CD4 T cell proliferative response was enhanced in the presence of anti-HLA class I, but attenuated in the presence of anti-A/B antibodies. Microarray analysis and molecular profiling demonstrated that the expression of CD274 programmed cell death ligand 1 (PD-L1) increased in response to anti-A/B ligation-mediated extracellular signal-regulated kinase (ERK) inactivation in endothelial cells that were detected even in the presence of interferon-γ stimulation. Anti-PD-1 antibody enhanced CD4 T cell proliferation, and blocked the suppressive effect of the anti-A/B antibodies. Educated CD25+ CD127- regulatory T cells (edu.Tregs ) were more effective at preventing CD4 T cell alloresponses to endothelial cells compared with naive Treg ; anti-A/B antibodies were not involved in the Treg -mediated events. Finally, amplified expression of transcript encoding PD-L1 was observed in biopsy samples from ABO-I renal transplants when compared with those from ABO-identical/compatible transplants. Taken together, our findings identified a possible factor that might prevent graft rejection and thus contribute to a favorable outcome in ABO-I renal transplantation.
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Affiliation(s)
- K Iwasaki
- Department of Kidney Disease and Transplant Immunology, Aichi Medical University School of Medicine, Nagakute, Japan
| | - H Hamana
- Department of Immunology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - H Kishi
- Department of Immunology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - T Yamamoto
- Department of Transplant Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan
| | - T Hiramitsu
- Department of Transplant Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan
| | - M Okad
- Department of Transplant Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan
| | - T Tomosugi
- Department of Transplant Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan
| | - A Takeda
- Department of Transplant Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan
| | - S Narumi
- Department of Transplant Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan
| | - Y Watarai
- Department of Transplant Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan
| | - Y Miwa
- Department of Kidney Disease and Transplant Immunology, Aichi Medical University School of Medicine, Nagakute, Japan
| | - M Okumura
- Department of Renal Transplant Surgery, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Y Matsuoka
- Department of Renal Transplant Surgery, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - K Horimi
- Department of Renal Transplant Surgery, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - A Muraguchi
- Department of Immunology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - T Kobayash
- Department of Renal Transplant Surgery, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
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Takeuchi S, Watanabe T, Anegawa E, Sujino Y, Yagi N, Yoshitake K, Mochizuki H, Iwasaki K, Nakajima S, Kuroda K, Seguchi O, Yanase M, Tadokoro N, Yajima S, Fukushima S, Fujita T, Ogawa H, Fukushima N. The Development of Cardiac Allograft Vasculopathy Occurs in Early Intimal Thickening and Constrictive Remodeling in Long-Term Period; Long-Term Serial Intravascular Ultrasound Study. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.532] [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] Open
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Fukushima N, Yanase M, Watanabe T, Kuroda K, Nakajima S, Iwasaki K, Fujita T, Fukushima S, Tadokoro N, Kobayashi J. Mid-Term Effectiveness of Everolimus on Heart Transplant Recipients with Renal Dysfunction or Transplant Coronary Artery Atherosclerosis. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.602] [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] Open
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12
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Watanabe T, Yanase M, Fujita T, Fukushima S, Nakajima S, Kuroda K, Iwasaki K, Yajima S, Tadokoro N, Mochizuki H, Anegawa E, Sujino Y, Yagi N, Yoshitake K, Kobayashi J, Fukushima N. Donor-Transmitted Atherosclerosis and the Occurrence of Cardiac Antibody-Mediated Rejection Influenced on the Development of Cardiac Allograft Vasculopathy. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.537] [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] Open
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13
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Iwasaki K, Yoshitake K, Yagi N, Sujino Y, Anegawa E, Mochizuki H, Kuroda K, Nakajima S, Watanabe T, Seguchi O, Yanase M, Fukushima S, Fujita T, Kobayashi J, Fukushima N. Incidence, Factors and Prognostic Impact of Re-Exploration for Bleedings after Continuous Flow Left Ventricular Assist Device Implantation. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.520] [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] Open
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Nomoto M, Iwaki H, Tagawa M, Iwasaki K. Comparison of zonisamide with non-levodopa, anti-Parkinson’s disease drugs in the incidence of Parkinson’s disease-relevant symptoms. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.809] [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: 10/25/2022]
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15
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Iwasaki K, Seguchi O, Mochizuki H, Kimura Y, Kumai Y, Kuroda K, Nakajima S, Watanabe T, Yanase M, Matsumoto Y, Fukushima S, Fujita T, Kobayashi J, Fukushima N. P1671Subclinical persistent hemolysis may affect late renal function deterioration after HeartMateII implantation. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0428] [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: 11/14/2022] Open
Abstract
Abstract
Background
Late renal function dysfunction is an increasingly recognized complication in continuous flow left ventricular assist device (CF-LVAD) patients. Although hemolysis is prevalent in CF-LVAD patients and hemolysis may deteriorate renal function, the influence of persistent hemolysis on renal function in CF-LVAD patients remains to be investigated.
Purpose
To investigate the influence of persistent hemolysis on renal function in CF-LVAD patients, using lactate dehydrogenase (LDH) as a sensitive marker of hemolysis.
Methods
Excluding patients who died or underwent pump exchange for pump thrombosis, we retrospectively reviewed 65 consecutive adults who underwent HeartMateII implantation in our center from May 2011 to October 2017. Patient characteristics, chronotropic change of estimated glomerular filtration rate (eGFR) and LDH values weekly for 4 weeks and every 4 weeks between 4 and 48 weeks after implantation were collected. Then, calculating mean LDH during 48 weeks after implantation, study population was divided into low and high mean LDH groups at the median value of mean LDH.
Results
The median value of mean LDH was 304 U/l. Compared with low LDH patients, though high LDH patients were more likely female and had smaller body surface area, there were no significant difference in pre-operative eGFR between the groups (66.0±23.7 vs. 70.2±25.7 ml/min/1.73m2, p=0.495). After 40 weeks after implantation, high LDH patients had significantly lower eGFR than low LDH patients (71.0±23.7 vs. 87.1±31.4 ml/min/1.73m2, p=0.024). In multivariate linear regression analysis, mean LDH [parameter estimate: −0.10 (95% CI: −0.17 to −0.04), p=0.003] and post-operative pulse pressure [parameter estimate: 0.71 (95% CI: 0.05 to 1.37), p=0.036] were significantly associated with eGFR change during 48 weeks after HeartMateII implantation.
Univariate and multivariate linear regression analysis for eGFR change Univariate parameter estimate 95% CI p value Multivariate parameter estimate 95% CI p value Bilirubin, mg/dl 9.97 3.82 to 16.13 0.002 6.55 −0.43 to 13.53 0.065 BNP, pg/ml 0.01 0.00 to 0.02 0.044 0.00 −0.01 to 0.01 0.528 Mean LDH during 4 to 48 weeks, U/l −0.11 −0.18 to −0.05 <0.001 −0.10 −0.17 to −0.04 0.003 Pre-operative right atrial pressure, mmHg 1.43 0.35 to 2.51 0.010 −0.06 −1.52 to 1.40 0.935 Post-operative pulse pressure, mmHg 0.77 0.03 to 1.52 0.042 0.71 0.05 to 1.37 0.036
Conclusions
High mean LDH and low pulse pressure were associated with a significant decrease in eGFR late after HeartMateII implantation. Subclinical persistent hemolysis may be associated with late renal function deterioration in CF-LVAD patients.
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Affiliation(s)
- K Iwasaki
- National Cerebral and Cardiovascular Center, Transplant medicine, Osaka, Japan
| | - O Seguchi
- National Cerebral and Cardiovascular Center, Transplant medicine, Osaka, Japan
| | - H Mochizuki
- National Cerebral and Cardiovascular Center, Transplant medicine, Osaka, Japan
| | - Y Kimura
- National Cerebral and Cardiovascular Center, Transplant medicine, Osaka, Japan
| | - Y Kumai
- National Cerebral and Cardiovascular Center, Transplant medicine, Osaka, Japan
| | - K Kuroda
- National Cerebral and Cardiovascular Center, Transplant medicine, Osaka, Japan
| | - S Nakajima
- National Cerebral and Cardiovascular Center, Transplant medicine, Osaka, Japan
| | - T Watanabe
- National Cerebral and Cardiovascular Center, Transplant medicine, Osaka, Japan
| | - M Yanase
- National Cerebral and Cardiovascular Center, Transplant medicine, Osaka, Japan
| | - Y Matsumoto
- National Cerebral and Cardiovascular Center, Cardiovascular surgery, Osaka, Japan
| | - S Fukushima
- National Cerebral and Cardiovascular Center, Cardiovascular surgery, Osaka, Japan
| | - T Fujita
- National Cerebral and Cardiovascular Center, Cardiovascular surgery, Osaka, Japan
| | - J Kobayashi
- National Cerebral and Cardiovascular Center, Cardiovascular surgery, Osaka, Japan
| | - N Fukushima
- National Cerebral and Cardiovascular Center, Transplant medicine, Osaka, Japan
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16
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Iwasaki K, Washio K, Meinzer W, Tsumanuma Y, Yano K, Ishikawa I. Application of cell-sheet engineering for new formation of cementum around dental implants. Heliyon 2019; 5:e01991. [PMID: 31338459 PMCID: PMC6626299 DOI: 10.1016/j.heliyon.2019.e01991] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [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: 12/13/2018] [Revised: 05/08/2019] [Accepted: 06/18/2019] [Indexed: 01/09/2023] Open
Abstract
Periodontal disease involves the chronic inflammation of tooth supporting periodontal tissues. As the disease progresses, it manifests destruction of periodontal tissues and eventual tooth loss. The regeneration of lost periodontal tissue has been one of the most important subjects in periodontal research. Since their discovery, periodontal ligament stem cells (PDLSCs), have been transplanted into periodontal bony defects to examine their regenerative potential. Periodontal defects were successfully regenerated using PDLSC sheets, which were fabricated by cell sheet engineering in animal models, and for which clinical human trials are underway. To expand the utility of PDLSC sheet, we attempted to construct periodontal tissues around titanium implants with the goal of facilitating the prevention of peri-implantitis. In so doing, we found newly formed cementum-periodontal ligament (PDL) structures on the implant surface. In this mini review, we summarize the literature regarding cell-based periodontal regeneration using PDLSCs, as well as previous trials aimed at forming periodontal tissues around dental implants. Moreover, the recent findings in cementogenesis are reviewed from the perspective of the formation of further stable periodontal attachment structure on dental implant. This mini review aims to summarize the current status of the creation of novel periodontal tissue-bearing dental implants, and to consider its future direction.
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Affiliation(s)
- Kengo Iwasaki
- Institute of Dental Research, Osaka Dental University, Japan
| | - Kaoru Washio
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Japan
| | - Walter Meinzer
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Japan
| | - Yuka Tsumanuma
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Japan
| | - Kosei Yano
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Japan
| | - Isao Ishikawa
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Japan
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17
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Iwasaki K, Komaki M, Akazawa K, Nagata M, Yokoyama N, Watabe T, Morita I. Spontaneous differentiation of periodontal ligament stem cells into myofibroblast during ex vivo expansion. J Cell Physiol 2019; 234:20377-20391. [PMID: 30963561 DOI: 10.1002/jcp.28639] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 03/14/2019] [Accepted: 03/19/2019] [Indexed: 12/11/2022]
Abstract
Periodontitis is characterized by the chronic inflammation and destruction of tooth-supporting tissues. Periodontal ligament stem cell (PDLSC) is the mesenchymal stem cell (MSC) population isolated from periodontal ligament, which is the key tissue for regeneration of periodontal tissues. Although transplantation of PDLSCs is proposed as novel regenerative therapy, limited information is available, regarding the characteristic change of PDLSCs during ex vivo expansion. In this study, we encountered morphological change of PDLSCs during standard cell culture and aimed to investigate the change of PDLSCs in stem cell characteristics and to search for the culture condition to maintain stem cell properties. Characteristics of PDLSCs were examined using in vitro osteoblast and adipocyte differentiation. Myofibroblast differentiation was confirmed using immunohistochemistry and collagen gel contraction assay. Replicative senescence was examined by β-gal staining. PDLSCs changed their morphology from spindle to flat and wide during ex vivo expansion. After the morphological change, PDLSCs showed several features of myofibroblast including extensive stress fiber formation, contraction activity, and myofibroblast marker expression. Upon the morphological change, osteoblastic and adipocyte differentiation capacity were reduced and expression of stem cell-related genes were decreased. β-Gal staining was not always correlated with the morphological change of PDLSCs. Moreover, exogenous addition of bFGF and PDGF-BB served to maintain spindle shape and osteoblastic differentiation potential of PDLSCs. This study demonstrates that spontaneous differentiation of PDLSCs during ex vivo expansion and may provide the important information of cell culture condition of PDLSCs for clinical use.
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Affiliation(s)
- Kengo Iwasaki
- Institute of Dental Research, Osaka Dental University, Osaka, Japan.,Department of Nanomedicine (DNP), Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.,Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Motohiro Komaki
- Department of Nanomedicine (DNP), Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.,Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.,Yokohama Clinic, Kanagawa Dental University, Yokohama, Kanagawa, Japan
| | - Keiko Akazawa
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Mizuki Nagata
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Naoki Yokoyama
- Biomaterial Laboratory, Research and Development Center, Dai Nippon Printing Co., Ltd., Kashiwa, Chiba, Japan
| | - Tetsuro Watabe
- Biochemistry, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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18
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Kimura Y, Seguchi O, Mochizuki H, Iwasaki K, Toda K, Kumai Y, Kuroda K, Nakajima S, Watanabe T, Matsumoto Y, Fukushima S, Yanase M, Fujita T, Kobayashi J, Fukushima N. Role of Gallium-SPECT-CT in Predicting Outcomes of Patients with Ventricular Assist Device-Specific Percutaneous Driveline Infection. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.800] [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] Open
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19
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Adjedj J, Picard F, Mogi S, Iwasaki K, Aoumeur H, Alansari O, Agudze E, Wijns W, Varenne O. In vitro flow and optical coherence tomography comparison of two bailout techniques after failed after provisional T-stenting for bifurcation percutaneous coronary interventions. Archives of Cardiovascular Diseases Supplements 2019. [DOI: 10.1016/j.acvdsp.2018.10.044] [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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20
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Iwasaki K, Nagata M, Akazawa K, Watabe T, Morita I. Changes in characteristics of periodontal ligament stem cells in spheroid culture. J Periodontal Res 2018; 54:364-373. [PMID: 30597545 DOI: 10.1111/jre.12637] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 08/15/2018] [Revised: 11/01/2018] [Accepted: 12/05/2018] [Indexed: 12/15/2022]
Abstract
OBJECTIVES The periodontal ligament (PDL) has important roles in maintaining homeostasis, wound healing, and regeneration of periodontal tissues by supplying stem/progenitor cells. Periodontal ligament stem cells (PDLSCs) have mesenchymal stem cell (MSC)-like characteristics and can be isolated from periodontal tissues. The aim of this study was to examine the effect of three-dimensional spheroid culture on the characteristics of PDLSCs. MATERIAL AND METHODS Periodontal ligament stem cells were isolated and cultured from healthy teeth, and PDLSC spheroids were formed by pellet culture in polypropylene tubes. The proliferation of PDLSCs in spheroids and conventional two-dimensional (2D) cultures were examined by immunostaining for Ki67. Cell death and cell size were analyzed using flow cytometry. Gene expression changes were investigated by quantitative real time PCR. RESULTS Periodontal ligament stem cells spontaneously formed spheroid masses in pellet culture. The size of PDLSC spheroids was inversely proportional to the culture period. Fewer Ki67-positive cells were detected in PDLSC spheroids compared to those in 2D culture. Flow cytometry revealed an increase in dead cells and a decrease in cell size in PDLSC spheroids. The expression levels of genes related to anti-inflammation (TSG6, COX2, MnSOD) and angiogenesis (VEGF, bFGF, HGF) were drastically increased by spheroid culture compared to 2D culture. TSG6 gene expression was inhibited in PDLSC spheroids in the presence of the apoptosis signal inhibitor, Z-VAD-FMK. Additionally, PDLSC spheroid transplantation into rat periodontal defects did not induce the regeneration of periodontal tissues. CONCLUSIONS We found that spheroid culture of PDLSCs affected several characteristics of PDLSCs, including the expression of genes related to anti-inflammation and angiogenesis; apoptosis signaling may be involved in these changes. Our results revealed the characteristics of PDLSCs in spheroid culture and have provided new information to the field of stem cell research.
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Affiliation(s)
- Kengo Iwasaki
- Institute of Dental Research, Osaka Dental University, Osaka, Japan.,Department of Nanomedicine (DNP), Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.,Department of Periodontology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - Mizuki Nagata
- Department of Periodontology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - Keiko Akazawa
- Department of Periodontology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tetsuro Watabe
- Biochemistry, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan
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21
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Iwasaki K, Seguchi O, Mochizuki H, Kimura Y, Toda K, Kumai Y, Kuroda K, Nakajima S, Watanabe T, Yanase M, Matsumoto Y, Fukushima S, Fujita T, Kobayashi J, Fukushima N. Terminal Ileac Ulcers Mimicked Post-transplantation Lymphoproliferative Disorder in a Heart Recipient Treated With Everolimus: A Case Report. Transplant Proc 2018; 50:4053-4056. [PMID: 30577313 DOI: 10.1016/j.transproceed.2018.08.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 08/29/2018] [Indexed: 02/07/2023]
Abstract
Post-transplant lymphoproliferative disorder (PTLD) is a well-recognized and potentially fatal complication of cardiac transplantation that commonly involves the gastrointestinal tract. Herein, we report a case of life-threatening gastrointestinal bleeding from recurrent terminal ileac ulcers mimicking PTLD in a heart recipient treated with everolimus (EVL). A 40-year-old man underwent heart transplantation for dilated cardiomyopathy 3 years prior to the current admission and was treated with tacrolimus and EVL. He was admitted to a local hospital because of fever, abdominal pain, and diarrhea. His symptoms persisted and, 3 weeks later, hematochezia occurred; thus, he was transferred to our hospital. As computed tomography and 18F-fluorodeoxyglucose positron emission tomography showed bowel-wall thickening of the terminal ileum, gastrointestinal PTLD was initially suspected. However, although colonoscopy- performed after switching EVL to mycophenolate mofetil (MMF)-showed terminal ileac ulcers, the histologic examination revealed no findings corresponding to PTLD. As EVL may delay ulcer healing, MMF was maintained for 3 months. After repeated colonoscopy showed ulcer healing, MMF was switched back to EVL for cardiac allograft vasculopathy prevention. Three weeks later, he was emergently admitted to a local hospital for life-threatening gastrointestinal bleeding from a recurrent terminal ileal ulcer, which required hemostatic forceps hemostasis. As EVL is suspected to be associated with recurrent ileal ulcers, EVL was again switched back to MMF. The ileal ulcers resolved, without recurrence in 3 months of clinical follow-up. This case demonstrates that cases of life-threatening gastrointestinal bleeding from recurrent terminal ileac ulcers can mimic PTLD in a heart recipient treated with EVL.
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Affiliation(s)
- K Iwasaki
- Department of Transplant Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - O Seguchi
- Department of Transplant Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - H Mochizuki
- Department of Transplant Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Y Kimura
- Department of Transplant Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - K Toda
- Department of Transplant Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Y Kumai
- Department of Transplant Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - K Kuroda
- Department of Transplant Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - S Nakajima
- Department of Transplant Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - T Watanabe
- Department of Transplant Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - M Yanase
- Department of Transplant Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Y Matsumoto
- Department of Cardiovascular Surgery, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - S Fukushima
- Department of Cardiovascular Surgery, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - T Fujita
- Department of Cardiovascular Surgery, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - J Kobayashi
- Department of Cardiovascular Surgery, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - N Fukushima
- Department of Transplant Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan.
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22
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Buranasin P, Mizutani K, Iwasaki K, Pawaputanon Na Mahasarakham C, Kido D, Takeda K, Izumi Y. High glucose-induced oxidative stress impairs proliferation and migration of human gingival fibroblasts. PLoS One 2018; 13:e0201855. [PMID: 30092096 PMCID: PMC6084939 DOI: 10.1371/journal.pone.0201855] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [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: 05/15/2018] [Accepted: 07/23/2018] [Indexed: 12/18/2022] Open
Abstract
Delayed gingival wound healing is widely observed in periodontal patients with diabetes. However, the molecular mechanisms of the impaired function of gingival fibroblasts in diabetes remain unclear. The purpose of this study was to investigate changes in the properties of human gingival fibroblasts (HGFs) under high-glucose conditions. Primary HGFs were isolated from healthy gingiva and cultured with 5.5, 25, 50, and 75 mM glucose for 72 h. In vitro wound healing, 5-ethynyl-2′-deoxyuridine (EdU), and water-soluble tetrazolium salt (WST-8) assays were performed to examine cell migration and proliferation. Lactase dehydrogenase (LDH) levels were measured to determine cytotoxicity. The mRNA expression levels of oxidative stress markers were quantified by real-time PCR. Intracellular reactive oxygen species (ROS) were also measured in live cells. The antioxidant N-acetyl-l-cysteine (NAC, 1 mM) was added to evaluate the involvement of ROS in the glucose effect on HGFs. As a result, the in vitro wound healing assay showed that high glucose levels significantly reduced fibroblast migration and proliferation at 6, 12, 24, 36, and 48 h. The numbers of cells positive for EdU staining were decreased, as was cell viability, at 50 and 75 mM glucose. A significant increase in LDH was proportional to the glucose concentration. The mRNA levels of heme oxygenase-1 and superoxide dismutase-1 and ROS levels were significantly increased in HGFs after 72 h of exposure to 50 mM glucose concentration. The addition of NAC diminished the inhibitory effect of high glucose in the in vitro wound healing assay. The results of the present study show that high glucose impairs the proliferation and migration of HGFs. Fibroblast dysfunction may therefore be caused by high glucose-induced oxidative stress and may explain the delayed gingival wound healing in diabetic patients.
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Affiliation(s)
- Prima Buranasin
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Koji Mizutani
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
- * E-mail:
| | - Kengo Iwasaki
- Department of Nanomedicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | | | - Daisuke Kido
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Kohei Takeda
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Yuichi Izumi
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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23
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Iwasaki K, Temin HM. Multiple sequence elements are involved in RNA 3' end formation in spleen necrosis virus. Gene Expr 2018; 2:7-18. [PMID: 1319783 PMCID: PMC6057358] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The function of the poly(A) signal in spleen necrosis virus (SNV) is dependent upon the distance between the cap site and the poly(A) site, while the function of the SV40 late poly(A) signal is independent of the distance. Deletions in the SNV poly(A) sequence do not alter the distance-dependent function. SNV/SV40 chimeric poly(A) signals show intermediate behavior between the SNV and SV40 poly(A) signals. These results indicate that multiple sequence elements are involved in the functions of either the SNV or SV40 poly(A) signals. This intermediate behavior is also observed with poly(A) signals from the mouse alpha-globin and herpes simplex virus thymidine kinase genes.
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Affiliation(s)
- K Iwasaki
- McArdle Laboratory for Cancer Research, University of Wisconsin, Madison 53706
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24
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Malchesky P, Takahashi T, Iwasaki K, Harasaki H, Nosé Y. Conjugated Human Hemoglobin as a Physiological Oxygen Carrier - Pyridoxalated Hemoglobin Polyoxyethylene Conjugate (PHP). Int J Artif Organs 2018. [DOI: 10.1177/039139889001300711] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [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]
Abstract
Problems associated with specific physiological properties of Hb-based blood substitutes, such as a low P50, short plasma half-life and nephrotoxicity are still major issues to be addressed. Extensive investigations aimed at overcoming these problems have resulted in the preparation of pyridoxalated-hemoglobin-polyoxyethylene conjugate (PHP). PHP was developed from human hemoglobin by two major chemical modifications; pyridoxylation for the purpose of lowering the oxygen affinity (P50 of 19.5 ± 1.2 mmHg), and coupling with polyoxyethylene (POE) to increase its molecular weight (to approximately 90 kdaltons). The circulating half-life of PHP is about 40 hours in dogs. Toxicologicai and physiological studies including renal function assessments have demonstrated that PHP does not have untoward effects on major organ functions. Its efficacy in transporting oxygen has been shown in ET and intracoronary perfusion, and in in vitro studies with sickle cells. Studies to date suggest that PHP is a promising candidate as a physiological oxygen carrier. In this paper the properties of PHP, its safety and efficacy aspects, and its potential as a clinical oxygen carrier are reviewed based on studies conducted in the Author's laboratory.
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Affiliation(s)
- P.S. Malchesky
- Department of Artificial Organs, The Cleveland Clinic Foundation, Cleveland, Ohio - U.S.A
| | - T. Takahashi
- Department of Artificial Organs, The Cleveland Clinic Foundation, Cleveland, Ohio - U.S.A
| | - K. Iwasaki
- Department of Artificial Organs, The Cleveland Clinic Foundation, Cleveland, Ohio - U.S.A
| | - H. Harasaki
- Department of Artificial Organs, The Cleveland Clinic Foundation, Cleveland, Ohio - U.S.A
| | - Y. Nosé
- Department of Artificial Organs, The Cleveland Clinic Foundation, Cleveland, Ohio - U.S.A
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25
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Iwasaki K, Kimura Y, Toda K, Kikuchi N, Kumai Y, Kuroda K, Seguchi O, Yanase M, Matsumoto Y, Fujita T, Kobayashi J, Fukushima N. Impact of Creatinine Excretion Rate, a Maker of Sarcopenia, on Prediction of Mortality and Neurological Events in Advanced Heart Failure Patients With Left Ventricular Assist Device. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.700] [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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26
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Abstract
In a previous communication, we reported a leaflet fracture in a Jellyfish valve that was incorporated into a blood pump, after a 312-day animal implant duration. Subsequent finite element analysis revealed that the fracture location was consistent with an area of maximum strain concentration. Therefore, the aim of this study was to improve the durability in the light of these findings. Based on the engineering analysis results, a new valve seat having a concentric ring of 0.5mm width, located at a radius of 7.0 mm, was designed and fabricated. Accelerated fatigue tests, conducted under the conditions recommended by ISO 5840, demonstrated that the durability of this new prototype was extended by a factor of 10, as compared to the original valve. Moreover, further finite element analysis indicated that the maximum equivalent elastic strain of the proposed new valve was reduced by 52.3% as compared to the original valve. Accordingly, it has been confirmed that the modified Jellyfish valve is suitable for use in long-term artificial hearts.
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Affiliation(s)
- K. Iwasaki
- Department of Mechanical Engineering, Waseda University, Tokyo - Japan
| | - M. Umezu
- Department of Mechanical Engineering, Waseda University, Tokyo - Japan
| | - K. Imachi
- Department of Biomedical Engineering, Graduate School of Medicine, The University of Tokyo, Tokyo - Japan
| | - K. Iijima
- Department of Mechanical Engineering, Waseda University, Tokyo - Japan
| | - T. Fujimoto
- Department of Mechanical Engineering, Shibaura Institute of Technology, Tokyo - Japan
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27
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Kong S, Aoki A, Iwasaki K, Mizutani K, Katagiri S, Suda T, Ichinose S, Ogita M, Pavlic V, Izumi Y. Biological effects of Er:YAG laser irradiation on the proliferation of primary human gingival fibroblasts. J Biophotonics 2018; 11:e201700157. [PMID: 29045028 DOI: 10.1002/jbio.201700157] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [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: 06/15/2017] [Revised: 09/01/2017] [Accepted: 09/13/2017] [Indexed: 06/07/2023]
Abstract
We investigated the biological effects of Er:YAG laser (2940-nm; DELight, HOYA ConBio, Fremont, California) irradiation at fluences of 3.6, 4.2, 4.9, 6.3, 8.1 or 9.7 J cm-2 at 20 or 30 Hz for 20 or 30 seconds on primary human gingival fibroblasts (HGFs). Irradiation at 6.3 J cm-2 promoted maximal cell proliferation, determined by WST-8 assay and crystal violet staining, but was accompanied by lactate dehydrogenase release, on day 3 post-irradiation. Elevation of ATP level, Ki67 staining, and cyclin-A2 mRNA expression confirmed that Er:YAG affected the cell cycle and increased the number of proliferating cells. Transmission electron microscopy showed alterations of mitochondria and ribosomal endoplasmic reticulum (ER) at 3 hours post-irradiation at 6.3 J cm-2 , and the changes subsided after 24 hours, suggesting transient cellular injury. Microarray analysis revealed up-regulation of 21 genes involved in heat-related biological responses and ER-associated degradation. The mRNA expression of heat shock protein 70 family was increased, as validated by Real-time PCR. Surface temperature measurement confirmed that 6.3 J cm-2 generated heat (40.9°C post-irradiation). Treatment with 40°C-warmed medium increased proliferation. Laser-induced proliferation was suppressed by inhibition of thermosensory transient receptor potential channels. Thus, despite causing transient cellular damage, Er:YAG laser irradiation at 6.3 J cm-2 strongly potentiated HGF proliferation via photo-thermal stress, suggesting potential wound-healing benefit.
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Affiliation(s)
- Sophannary Kong
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akira Aoki
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kengo Iwasaki
- Department of Nanomedicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Koji Mizutani
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Sayaka Katagiri
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tomonari Suda
- Dental and Oral Surgery, Secomedic Hospital, Chiba, Japan
| | - Shizuko Ichinose
- Research Center for Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan
| | | | - Verica Pavlic
- Department of Periodontology and Oral Medicine, Institute of Dentistry, Banja Luka, Bosnia and Herzegovina
- Department of Periodontology and Oral Medicine, Medical faculty University of Banja Luka, 78000 Banjaluka, Republic of Srpska, Bosnia and Herzegovina
| | - Yuichi Izumi
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Kido D, Mizutani K, Takeda K, Mikami R, Matsuura T, Iwasaki K, Izumi Y. Impact of diabetes on gingival wound healing via oxidative stress. PLoS One 2017; 12:e0189601. [PMID: 29267310 PMCID: PMC5739411 DOI: 10.1371/journal.pone.0189601] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [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: 07/18/2017] [Accepted: 11/28/2017] [Indexed: 12/21/2022] Open
Abstract
The aim of this study is to investigate the mechanisms linking high glucose to gingival wound healing. Bilateral wounds were created in the palatal gingiva adjacent to maxillary molars of control rats and rats with streptozotocin-induced diabetes. After evaluating postsurgical wound closure by digital imaging, the maxillae including wounds were resected for histological examinations. mRNA expressions of angiogenesis, inflammation, and oxidative stress markers in the surgical sites were quantified by real-time polymerase chain reaction. Primary fibroblast culture from the gingiva of both rats was performed in high glucose and normal medium. In vitro wound healing and cell proliferation assays were performed. Oxidative stress marker mRNA expressions and reactive oxygen species production were measured. Insulin resistance was evaluated via PI3K/Akt and MAPK/Erk signaling following insulin stimulation using Western blotting. To clarify oxidative stress involvement in high glucose culture and cells of diabetic rats, cells underwent N-acetyl-L-cysteine treatment; subsequent Akt activity was measured. Wound healing in diabetic rats was significantly delayed compared with that in control rats. Nox1, Nox2, Nox4, p-47, and tumor necrosis factor-α mRNA levels were significantly higher at baseline in diabetic rats than in control rats. In vitro study showed that cell proliferation and migration significantly decreased in diabetic and high glucose culture groups compared with control groups. Nox1, Nox2, Nox4, and p47 expressions and reactive oxygen species production were significantly higher in diabetic and high glucose culture groups than in control groups. Akt phosphorylation decreased in the high glucose groups compared with the control groups. Erk1/2 phosphorylation increased in the high glucose groups, with or without insulin treatment, compared with the control groups. Impaired Akt phosphorylation partially normalized after antioxidant N-acetyl-L-cysteine treatment. Thus, delayed gingival wound healing in diabetic rats occurred because of impaired fibroblast proliferation and migration. Fibroblast dysfunction may occur owing to high glucose-induced insulin resistance via oxidative stress.
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Affiliation(s)
- Daisuke Kido
- Department of Periodontology, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Koji Mizutani
- Department of Periodontology, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
- * E-mail:
| | - Kohei Takeda
- Department of Periodontology, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Risako Mikami
- Department of Periodontology, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Takanori Matsuura
- Department of Periodontology, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Kengo Iwasaki
- Department of Nanomedicine, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Yuichi Izumi
- Department of Periodontology, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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Akazawa K, Iwasaki K, Nagata M, Yokoyama N, Ayame H, Yamaki K, Tanaka Y, Honda I, Morioka C, Kimura T, Komaki M, Kishida A, Izumi Y, Morita I. Cell transfer technology for tissue engineering. Inflamm Regen 2017; 37:21. [PMID: 29259720 PMCID: PMC5725820 DOI: 10.1186/s41232-017-0052-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [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: 05/31/2017] [Accepted: 09/18/2017] [Indexed: 12/28/2022] Open
Abstract
We recently developed novel cell transplantation method “cell transfer technology” utilizing photolithography. Using this method, we can transfer ex vivo expanded cells onto scaffold material in desired patterns, like printing of pictures and letters on a paper. We have investigated the possibility of this novel method for cell-based therapy using several disease models. We first transferred endothelial cells in capillary-like patterns on amnion. The transplantation of the endothelial cell-transferred amnion enhanced the reperfusion in mouse ischemic limb model. The fusion of transplanted capillary with host vessel networks was also observed. The osteoblast- and periodontal ligament stem cell-transferred amnion were next transplanted in bone and periodontal defects models. After healing period, both transplantations improved the regeneration of bone and periodontal tissues, respectively. This method was further applicable to transfer of multiple cell types and the transplantation of osteoblasts and periodontal ligament stem cell-transferred amnion resulted in the improved bone regeneration compared with single cell type transplantation. These data suggested the therapeutic potential of the technology in cell-based therapies for reperfusion of ischemic limb and regeneration of bone and periodontal tissues. Cell transfer technology is applicable to wide range of regenerative medicine in the future.
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Affiliation(s)
- Keiko Akazawa
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510 Japan
| | - Kengo Iwasaki
- Department of Nanomedicine (DNP), Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510 Japan
| | - Mizuki Nagata
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510 Japan
| | - Naoki Yokoyama
- Life Science Laboratory, Research and Development Center, Dai Nippon Printing Co., Ltd., 1-1-1 Kaga-cho, Shinjuku-ku, Tokyo, 162-8001 Japan
| | - Hirohito Ayame
- Life Science Laboratory, Research and Development Center, Dai Nippon Printing Co., Ltd., 1-1-1 Kaga-cho, Shinjuku-ku, Tokyo, 162-8001 Japan
| | - Kazumasa Yamaki
- Life Science Laboratory, Research and Development Center, Dai Nippon Printing Co., Ltd., 1-1-1 Kaga-cho, Shinjuku-ku, Tokyo, 162-8001 Japan
| | - Yuichi Tanaka
- Life Science Laboratory, Research and Development Center, Dai Nippon Printing Co., Ltd., 1-1-1 Kaga-cho, Shinjuku-ku, Tokyo, 162-8001 Japan
| | - Izumi Honda
- Department of Comprehensive Reproductive Medicine, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510 Japan
| | - Chikako Morioka
- Department of Pediatrics and Developmental Biology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510 Japan
| | - Tsuyoshi Kimura
- Department of Comprehensive Reproductive Medicine, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510 Japan
| | - Motohiro Komaki
- Department of Nanomedicine (DNP), Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510 Japan
| | - Akio Kishida
- Department of Material-based Medical Engineering, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10, Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-0062 Japan
| | - Yuichi Izumi
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510 Japan
| | - Ikuo Morita
- Department of Cellular Physiological Chemistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510 Japan
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Komaki M, Numata Y, Morioka C, Honda I, Tooi M, Yokoyama N, Ayame H, Iwasaki K, Taki A, Oshima N, Morita I. Exosomes of human placenta-derived mesenchymal stem cells stimulate angiogenesis. Stem Cell Res Ther 2017; 8:219. [PMID: 28974256 PMCID: PMC5627451 DOI: 10.1186/s13287-017-0660-9] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [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: 11/07/2016] [Revised: 09/04/2017] [Accepted: 09/06/2017] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The therapeutic potential of mesenchymal stem cells (MSCs) may be attributed partly to humoral factors such as growth factors, cytokines, and chemokines. Human term placental tissue-derived MSCs (PlaMSCs), or conditioned medium left over from cultures of these cells, have been reported to enhance angiogenesis. Recently, the exosome, which can transport a diverse suite of macromolecules, has gained attention as a novel intercellular communication tool. However, the potential role of the exosome in PlaMSC therapeutic action is not well understood. The purpose of this study was to evaluate PlaMSC-derived exosome angiogenesis promotion in vitro and in vivo. METHODS MSCs were isolated from human term placental tissue by enzymatic digestion. Conditioned medium was collected after 48-h incubation in serum-free medium (PlaMSC-CM). Angiogenic factors present in PlaMSC-CM were screened by a growth factor array. Exosomes were prepared by ultracentrifugation of PlaMSC-CM, and confirmed by transmission electron microscopy, dynamic light scattering, and western blot analyses. The proangiogenic activity of PlaMSC-derived exosomes (PlaMSC-exo) was assessed using an endothelial tube formation assay, a cell migration assay, and reverse transcription-PCR analysis. The in-vivo angiogenic activity of PlaMSC-exo was evaluated using a murine auricle ischemic injury model. RESULTS PlaMSC-CM contained both angiogenic and angiostatic factors, which enhanced endothelial tube formation. PlaMSC-exo were incorporated into endothelial cells; these exosomes stimulated both endothelial tube formation and migration, and enhanced angiogenesis-related gene expression. Laser Doppler blood flow analysis showed that PlaMSC-exo infusion also enhanced angiogenesis in an in-vivo murine auricle ischemic injury model. CONCLUSIONS PlaMSC-exo enhanced angiogenesis in vitro and in vivo, suggesting that exosomes play a role in the proangiogenic activity of PlaMSCs. PlaMSC-exo may be a novel therapeutic approach for treating ischemic diseases.
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Affiliation(s)
- Motohiro Komaki
- Department of Nanomedicine (DNP), Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, 113-8510, Tokyo, Japan. .,Current Address: Kanagawa Dental University, Yokohama Clinic, Tsuruya-cho 3-31-6, Kanagawa-ku, Yokohama, Kanagawa, 221-0835, Japan.
| | - Yuri Numata
- Department of Nanomedicine (DNP), Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, 113-8510, Tokyo, Japan
| | - Chikako Morioka
- Department of Pediatrics and Developmental Biology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, 113-8510, Tokyo, Japan
| | - Izumi Honda
- Department of Comprehensive Reproductive Medicine, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, 113-8510, Tokyo, Japan
| | - Masayuki Tooi
- Department of Periodontology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, 113-8510, Tokyo, Japan
| | - Naoki Yokoyama
- Life Science Department, Research and Development Division for Applied Technology, Research and Development Center, Dai Nippon Printing Co., Ltd, 250-1, Wakashiba, Kashiwa-city, Chiba, 277-0871, Japan
| | - Hirohito Ayame
- Life Science Department, Research and Development Division for Applied Technology, Research and Development Center, Dai Nippon Printing Co., Ltd, 250-1, Wakashiba, Kashiwa-city, Chiba, 277-0871, Japan
| | - Kengo Iwasaki
- Department of Nanomedicine (DNP), Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, 113-8510, Tokyo, Japan
| | - Atsuko Taki
- Department of Pediatrics and Developmental Biology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, 113-8510, Tokyo, Japan
| | - Noriko Oshima
- Department of Comprehensive Reproductive Medicine, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, 113-8510, Tokyo, Japan
| | - Ikuo Morita
- Department of Nanomedicine (DNP), Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, 113-8510, Tokyo, Japan
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Nagata M, Iwasaki K, Akazawa K, Komaki M, Yokoyama N, Izumi Y, Morita I. Conditioned Medium from Periodontal Ligament Stem Cells Enhances Periodontal Regeneration. Tissue Eng Part A 2017; 23:367-377. [PMID: 28027709 DOI: 10.1089/ten.tea.2016.0274] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Periodontal disease is one of the most common infectious diseases in adults and is characterized by the destruction of tooth-supporting tissues. Mesenchymal stem cells (MSCs) comprise the mesoderm-originating stem cell population, which has been studied and used for cell therapy. However, because of the lower rate of cell survival after MSC transplantation in various disease models, paracrine functions of MSCs have been receiving increased attention as a regenerative mechanism. The aim of this study was to investigate the regenerative potential of transplanted conditioned medium (CM) obtained from cultured periodontal ligament stem cells (PDLSCs), the adult stem cell population in tooth-supporting tissues, using a rat periodontal defect model. Cell-free CM was collected from PDLSCs and fibroblasts, using ultrafiltration and transplanted into surgically created periodontal defects. Protein content of CM was examined by antibody arrays. Formation of new periodontal tissues was analyzed using microcomputed tomography and histological sections. PDLSC-CM transplantation enhanced periodontal tissue regeneration in a concentration-dependent manner, whereas fibroblast-CM did not show any regenerative function. Proteomic analysis revealed that extracellular matrix proteins, enzymes, angiogenic factors, growth factors and cytokines were contained in PDLSC-CM. Furthermore, PDLSC-CM transplantation resulted in the decreased mRNA level of tumor necrosis factor-α (TNF-α) in healing periodontal tissues. In addition, we found that PDLSC-CM suppressed the mRNA level of TNF-α in the monocyte/macrophage cell line, RAW cells, stimulated with IFN-γ. Our findings suggested that PDLSC-CM enhanced periodontal regeneration by suppressing the inflammatory response through TNF-α production, and transplantation of PDLSC-CM could be a novel approach for periodontal regenerative therapy.
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Affiliation(s)
- Mizuki Nagata
- 1 Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University , Tokyo, Japan
| | - Kengo Iwasaki
- 2 Department of Nanomedicine (DNP), Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University , Tokyo, Japan
| | - Keiko Akazawa
- 1 Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University , Tokyo, Japan
| | - Motohiro Komaki
- 2 Department of Nanomedicine (DNP), Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University , Tokyo, Japan
| | - Naoki Yokoyama
- 3 Department of Life Science, Research and Development Division for Applied Technology, Research and Development Center, Dai Nippon Printing Co., Ltd. , Chiba, Japan
| | - Yuichi Izumi
- 1 Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University , Tokyo, Japan
| | - Ikuo Morita
- 4 Department of Cellular Physiological Chemistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University , Tokyo, Japan
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Morioka C, Komaki M, Taki A, Honda I, Yokoyama N, Iwasaki K, Iseki S, Morio T, Morita I. Neuroprotective effects of human umbilical cord-derived mesenchymal stem cells on periventricular leukomalacia-like brain injury in neonatal rats. Inflamm Regen 2017; 37:1. [PMID: 29259700 PMCID: PMC5725779 DOI: 10.1186/s41232-016-0032-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [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: 10/24/2016] [Accepted: 12/11/2016] [Indexed: 01/15/2023] Open
Abstract
Background Periventricular leukomalacia (PVL) is a type of multifactorial brain injury that causes cerebral palsy in premature infants. To date, effective therapies for PVL have not been available. In this study, we examined whether mesenchymal stem cells (MSCs) possess neuroprotective property in a lipopolysaccharide (LPS)-induced neonatal rat PVL-like brain injury. Methods Human umbilical cord-derived MSCs (UCMSCs) were used in this study. Four-day-old rats were intraperitoneally injected with LPS (15 mg/kg) to cause the PVL-like brain injury and were treated immediately after the LPS-injection with UCMSCs, conditioned medium prepared from MSCs (UCMSC-CM) or interferon-gamma (IFN-γ)-pretreated MSC (IFN-γ-UCMSC-CM). To assess systemic reaction to LPS-infusion, IFN-γ in sera was measured by ELISA. The brain injury was evaluated by immunostaining of myelin basic protein (MBP) and caspase-3. RT-PCR was used to quantitate pro-inflammatory cytokine levels in the brain injury, and the expression of tumor necrosis factor-stimulated gene-6 (TSG-6) or indoleamine 2,3-dioxygenase (IDO) to evaluate anti-inflammatory or immunomodulatory molecules in UCMSCs, respectively. A cytokine and growth factor array was employed to investigate the cytokine secretion profiles of UCMSCs. Results Elevated serum IFN-γ was observed in LPS-infused rats. The expression of IL-6, tumor necrosis factor-alpha (TNF-α), IL-1ß, and monocyte chemoattractant protein-1 (MCP-1) were increased in the brain by LPS-infusion in comparison to saline-infused control. LPS-infusion increased caspase-3-positive cells and decreased MBP-positive area in neonatal rat brains. A cytokine and growth factor array demonstrated that UCMSCs secreted various cytokines and growth factors. UCMSCs significantly suppressed IL-1ß expression in the brains and reversed LPS-caused decrease in MBP-positive area. UCMSC-CM did not reverse MBP-positive area in the injured brain, while IFN-γ-UCMSC-CM significantly increased MBP-positive area compared to control (no treatment). IFN-γ-pretreatment increased TSG-6 and IDO expression in UCMSCs. Conclusion We demonstrated that bolus intraperitoneal infusion of LPS caused PVL-like brain injury in neonatal rats and UCMSCs infusion ameliorated dysmyelination in LPS-induced neonatal rat brain injury. Conditioned medium prepared from IFN-γ-pretreated UCMSCs significantly reversed the brain damage in comparison with UCMSC-CM, suggesting that the preconditioning of UCMSCs would improve their neuroprotective effects. The mechanisms underline the therapeutic effects of MSCs on PVL need continued investigation to develop a more effective treatment.
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Affiliation(s)
- Chikako Morioka
- Department of Pediatrics and Developmental Biology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8510 Japan.,Department of Cellular Physiological Chemistry, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8510 Japan
| | - Motohiro Komaki
- Department of Nanomedicine (DNP), Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8510 Japan
| | - Atsuko Taki
- Department of Pediatrics and Developmental Biology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8510 Japan
| | - Izumi Honda
- Department of Cellular Physiological Chemistry, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8510 Japan
| | - Naoki Yokoyama
- Life Science Laboratory, Research and Development Center, Dai Nippon Printing Co., Ltd., 1-1-1 kaga-cho, Shinjuku-ku, Tokyo, 162-8001 Japan
| | - Kengo Iwasaki
- Department of Nanomedicine (DNP), Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8510 Japan
| | - Sachiko Iseki
- Department of Molecular Craniofacial Embryology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8510 Japan
| | - Tomohiro Morio
- Department of Pediatrics and Developmental Biology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8510 Japan
| | - Ikuo Morita
- Department of Cellular Physiological Chemistry, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8510 Japan
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Matsuo K, Takazawa Y, Ross MS, Elishaev E, Podzielinski I, Yunokawa M, Sheridan TB, Bush SH, Klobocista MM, Blake EA, Takano T, Matsuzaki S, Baba T, Satoh S, Shida M, Nishikawa T, Ikeda Y, Adachi S, Yokoyama T, Takekuma M, Fujiwara K, Hazama Y, Kadogami D, Moffitt MN, Takeuchi S, Nishimura M, Iwasaki K, Ushioda N, Johnson MS, Yoshida M, Hakam A, Li SW, Richmond AM, Machida H, Mhawech-Fauceglia P, Ueda Y, Yoshino K, Yamaguchi K, Oishi T, Kajiwara H, Hasegawa K, Yasuda M, Kawana K, Suda K, Miyake TM, Moriya T, Yuba Y, Morgan T, Fukagawa T, Wakatsuki A, Sugiyama T, Pejovic T, Nagano T, Shimoya K, Andoh M, Shiki Y, Enomoto T, Sasaki T, Fujiwara K, Mikami M, Shimada M, Konishi I, Kimura T, Post MD, Shahzad MM, Im DD, Yoshida H, Omatsu K, Ueland FR, Kelley JL, Karabakhtsian RG, Roman LD. Significance of histologic pattern of carcinoma and sarcoma components on survival outcomes of uterine carcinosarcoma. Ann Oncol 2016; 27:1257-66. [PMID: 27052653 DOI: 10.1093/annonc/mdw161] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [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: 12/07/2015] [Accepted: 03/29/2016] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND To examine the effect of the histology of carcinoma and sarcoma components on survival outcome of uterine carcinosarcoma. PATIENTS AND METHODS A multicenter retrospective study was conducted to examine uterine carcinosarcoma cases that underwent primary surgical staging. Archived slides were examined and histologic patterns were grouped based on carcinoma (low-grade versus high-grade) and sarcoma (homologous versus heterologous) components, correlating to clinico-pathological demographics and outcomes. RESULTS Among 1192 cases identified, 906 cases were evaluated for histologic patterns (carcinoma/sarcoma) with high-grade/homologous (40.8%) being the most common type followed by high-grade/heterologous (30.9%), low-grade/homologous (18.0%), and low-grade/heterologous (10.3%). On multivariate analysis, high-grade/heterologous (5-year rate, 34.0%, P = 0.024) and high-grade/homologous (45.8%, P = 0.017) but not low-grade/heterologous (50.6%, P = 0.089) were independently associated with decreased progression-free survival (PFS) compared with low-grade/homologous (60.3%). In addition, older age, residual disease at surgery, large tumor, sarcoma dominance, deep myometrial invasion, lymphovascular space invasion, and advanced-stage disease were independently associated with decreased PFS (all, P < 0.01). Both postoperative chemotherapy (5-year rates, 48.6% versus 39.0%, P < 0.001) and radiotherapy (50.1% versus 44.1%, P = 0.007) were significantly associated with improved PFS in univariate analysis. However, on multivariate analysis, only postoperative chemotherapy remained an independent predictor for improved PFS [hazard ratio (HR) 0.34, 95% confidence interval (CI) 0.27-0.43, P < 0.001]. On univariate analysis, significant treatment benefits for PFS were seen with ifosfamide for low-grade carcinoma (82.0% versus 49.8%, P = 0.001), platinum for high-grade carcinoma (46.9% versus 32.4%, P = 0.034) and homologous sarcoma (53.1% versus 38.2%, P = 0.017), and anthracycline for heterologous sarcoma (66.2% versus 39.3%, P = 0.005). Conversely, platinum, taxane, and anthracycline for low-grade carcinoma, and anthracycline for homologous sarcoma had no effect on PFS compared with non-chemotherapy group (all, P > 0.05). On multivariate analysis, ifosfamide for low-grade/homologous (HR 0.21, 95% CI 0.07-0.63, P = 0.005), platinum for high-grade/homologous (HR 0.36, 95% CI 0.22-0.60, P < 0.001), and anthracycline for high-grade/heterologous (HR 0.30, 95% CI 0.14-0.62, P = 0.001) remained independent predictors for improved PFS. Analyses of 1096 metastatic sites showed that carcinoma components tended to spread lymphatically, while sarcoma components tended to spread loco-regionally (P < 0.001). CONCLUSION Characterization of histologic pattern provides valuable information in the management of uterine carcinosarcoma.
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Affiliation(s)
- K Matsuo
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Southern California, Los Angeles, USA
| | - Y Takazawa
- Department of Pathology, Cancer Institute Hospital, Tokyo, Japan
| | - M S Ross
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology
| | - E Elishaev
- Department of Pathology, MaGee-Womens Hospital, University of Pittsburgh, Pittsburgh
| | - I Podzielinski
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Kentucky, Lexington, USA
| | - M Yunokawa
- Department of Breast and Medical Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - T B Sheridan
- Department of Pathology, Mercy Medical Center, Baltimore
| | - S H Bush
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of South Florida, Tampa
| | - M M Klobocista
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Bronx
| | - E A Blake
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology; University of Colorado, Boulder, USA
| | - T Takano
- Department of Obstetrics and Gynecology, Tohoku University, Miyagi
| | - S Matsuzaki
- Department of Obstetrics and Gynecology, Osaka University, Osaka
| | - T Baba
- Department of Obstetrics and Gynecology, Kyoto University, Kyoto
| | - S Satoh
- Department of Obstetrics and Gynecology, Tottori University, Tottori
| | - M Shida
- Department of Obstetrics and Gynecology, Tokai University, Kanagawa
| | - T Nishikawa
- Department of Gynecologic Oncology, Saitama Medical University International Medical Center, Saitama
| | - Y Ikeda
- Departments of Obstetrics and Gynecology, The University of Tokyo, Tokyo
| | - S Adachi
- Department of Obstetrics and Gynecology, Niigata University, Niigata
| | - T Yokoyama
- Department of Obstetrics and Gynecology, Osaka Rosai Hospital, Osaka
| | - M Takekuma
- Department of Obstetrics and Gynecology, Shizuoka Cancer Center, Shizuoka
| | - K Fujiwara
- Department of Obstetrics and Gynecology, Kurashiki Medical Center, Okayama
| | - Y Hazama
- Department of Obstetrics and Gynecology, Kawasaki Medical School, Okayama
| | - D Kadogami
- Department of Obstetrics and Gynecology; Kitano Hospital, Osaka, Japan
| | - M N Moffitt
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Portland, USA
| | - S Takeuchi
- Department of Obstetrics and Gynecology, Iwate Medical University, Morioka
| | - M Nishimura
- Department of Obstetrics and Gynecology, Tokushima University, Tokushima
| | - K Iwasaki
- Department of Obstetrics and Gynecology, Aichi Medical University, Aichi
| | - N Ushioda
- Department of Gynecology, Cancer Institute Hospital, Tokyo
| | - M S Johnson
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Kentucky, Lexington, USA
| | - M Yoshida
- Departments of Pathology, National Cancer Center Hospital, Tokyo, Japan
| | - A Hakam
- Department of Pathology, Moffitt Cancer Center, University of South Florida, Tampa
| | - S W Li
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Bronx
| | - A M Richmond
- Department of Pathology, University of Colorado, Boulder
| | - H Machida
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Southern California, Los Angeles, USA
| | - P Mhawech-Fauceglia
- Department of Pathology, University of Southern California, Los Angeles, USA
| | - Y Ueda
- Department of Obstetrics and Gynecology, Osaka University, Osaka
| | - K Yoshino
- Department of Obstetrics and Gynecology, Osaka University, Osaka
| | - K Yamaguchi
- Department of Obstetrics and Gynecology, Kyoto University, Kyoto
| | - T Oishi
- Department of Obstetrics and Gynecology, Tottori University, Tottori
| | - H Kajiwara
- Department of Pathology, Tokai University, Kanagawa
| | - K Hasegawa
- Department of Gynecologic Oncology, Saitama Medical University International Medical Center, Saitama
| | - M Yasuda
- Department of Pathology, Saitama Medical University International Medical Center, Saitama
| | - K Kawana
- Departments of Obstetrics and Gynecology, The University of Tokyo, Tokyo
| | - K Suda
- Department of Obstetrics and Gynecology, Niigata University, Niigata
| | - T M Miyake
- Department of Obstetrics and Gynecology, Kawasaki Medical School, Okayama
| | - T Moriya
- Department of Pathology, Kawasaki Medical School, Okayama
| | - Y Yuba
- Department of Pathology, Kitano Hospital, Osaka, Japan
| | - T Morgan
- Department of Pathology, Oregon Health & Science University, Portland, USA
| | - T Fukagawa
- Department of Pathology, Iwate Medical University, Morioka
| | - A Wakatsuki
- Department of Obstetrics and Gynecology, Aichi Medical University, Aichi
| | - T Sugiyama
- Department of Obstetrics and Gynecology, Iwate Medical University, Morioka
| | - T Pejovic
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Portland, USA
| | - T Nagano
- Department of Obstetrics and Gynecology; Kitano Hospital, Osaka, Japan
| | - K Shimoya
- Department of Obstetrics and Gynecology, Kawasaki Medical School, Okayama
| | - M Andoh
- Department of Obstetrics and Gynecology, Kurashiki Medical Center, Okayama
| | - Y Shiki
- Department of Obstetrics and Gynecology, Osaka Rosai Hospital, Osaka
| | - T Enomoto
- Department of Obstetrics and Gynecology, Niigata University, Niigata
| | - T Sasaki
- Department of Pathology, The University of Tokyo, Tokyo, Japan
| | - K Fujiwara
- Department of Gynecologic Oncology, Saitama Medical University International Medical Center, Saitama
| | - M Mikami
- Department of Obstetrics and Gynecology, Tokai University, Kanagawa
| | - M Shimada
- Department of Obstetrics and Gynecology, Tottori University, Tottori
| | - I Konishi
- Department of Obstetrics and Gynecology, Kyoto University, Kyoto
| | - T Kimura
- Department of Obstetrics and Gynecology, Osaka University, Osaka
| | - M D Post
- Department of Pathology, University of Colorado, Boulder
| | - M M Shahzad
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of South Florida, Tampa
| | - D D Im
- Department of Gynecology, Mercy Medical Center, Baltimore
| | - H Yoshida
- Departments of Pathology, National Cancer Center Hospital, Tokyo, Japan
| | - K Omatsu
- Department of Gynecology, Cancer Institute Hospital, Tokyo
| | - F R Ueland
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Kentucky, Lexington, USA
| | - J L Kelley
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology
| | - R G Karabakhtsian
- Department of Pathology, University of Kentucky, Lexington Department of Pathology, Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, USA
| | - L D Roman
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Southern California, Los Angeles, USA
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Tooi M, Komaki M, Morioka C, Honda I, Iwasaki K, Yokoyama N, Ayame H, Izumi Y, Morita I. Placenta Mesenchymal Stem Cell Derived Exosomes Confer Plasticity on Fibroblasts. J Cell Biochem 2016; 117:1658-70. [PMID: 26640165 DOI: 10.1002/jcb.25459] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 12/04/2015] [Indexed: 12/22/2022]
Abstract
Mesenchymal stem cell (MSC)-conditioned medium (MSC-CM) has been reported to enhance wound healing. Exosomes contain nucleic acids, proteins, and lipids, and function as an intercellular communication vehicle for mediating some paracrine effects. However, the function of MSC-derived exosomes (MSC-exo) remains elusive. In this study, we isolated human placenta MSC (PlaMSC)-derived exosomes (PlaMSC-exo) and examined their function in vitro. PlaMSCs were isolated from human term placenta using enzymatic digestion. PlaMSC-exo were prepared from the conditioned medium of PlaMSC (PlaMSC-CM) by ultracentrifugation. The expression of stemness-related genes, such as OCT4 and NANOG, in normal adult human dermal fibroblasts (NHDF) after incubation with PlaMSC-exo was measured by real-time reverse transcriptase PCR analysis (real-time PCR). The effect of PlaMSC-exo on OCT4 transcription activity was assessed using Oct4-EGFP reporter mice-derived dermal fibroblasts. The stimulating effects of PlaMSC-exo on osteoblastic and adipocyte-differentiation of NHDF were evaluated by alkaline phosphatase (ALP), and Alizarin red S- and oil red O-staining, respectively. The expression of osteoblast- and adipocyte-related genes was also assessed by real-time PCR. The treatment of NHDF with PlaMSC-exo significantly upregulated OCT4 and NANOG mRNA expression. PlaMSC-exo also enhanced OCT4 transcription. The NHDF treated with PlaMSC-exo exhibited osteoblastic and adipocyte-differentiation in osteogenic and adipogenic induction media. PlaMSC-exo increase the expression of OCT4 and NANOG mRNA in fibroblasts. As a result, PlaMSC-exo influence the differentiation competence of fibroblasts to both osteoblastic and adipocyte-differentiation. It shows a new feature of MSCs and the possibility of clinical application of MSC-exo. J. Cell. Biochem. 117: 1658-1670, 2016. © 2015 Wiley Periodicals, Inc.
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Affiliation(s)
- Masayuki Tooi
- Department of Periodontology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Motohiro Komaki
- Department of Nanomedicine (DNP), Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Chikako Morioka
- Department of Pediatrics and Developmental Biology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Izumi Honda
- Department of Comprehensive Reproductive Medicine, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Kengo Iwasaki
- Department of Nanomedicine (DNP), Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Naoki Yokoyama
- Life Science Laboratory, Research and Development Center, Dai Nippon Printing Co., Ltd., 1-1-1 Kaga-cho, Shinjuku-ku, Tokyo, 162-8001, Japan
| | - Hirohito Ayame
- Life Science Laboratory, Research and Development Center, Dai Nippon Printing Co., Ltd., 1-1-1 Kaga-cho, Shinjuku-ku, Tokyo, 162-8001, Japan
| | - Yuichi Izumi
- Department of Periodontology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Ikuo Morita
- Department of Cellular Physiological Chemistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
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Abbarin N, San Miguel S, Holcroft J, Iwasaki K, Ganss B. The enamel protein amelotin is a promoter of hydroxyapatite mineralization. J Bone Miner Res 2015; 30:775-85. [PMID: 25407797 DOI: 10.1002/jbmr.2411] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 11/04/2014] [Accepted: 11/14/2014] [Indexed: 01/29/2023]
Abstract
Amelotin (AMTN) is a recently discovered protein that is specifically expressed during the maturation stage of dental enamel formation. It is localized at the interface between the enamel surface and the apical surface of ameloblasts. AMTN knock-out mice have hypomineralized enamel, whereas transgenic mice overexpressing AMTN have a compact but disorganized enamel hydroxyapatite (HA) microstructure, indicating a possible involvement of AMTN in regulating HA mineralization directly. In this study, we demonstrated that recombinant human (rh) AMTN dissolved in a metastable buffer system, based on light scattering measurements, promotes HA precipitation. The mineral precipitates were characterized by scanning and transmission electron microscopy and electron diffraction. Colloidal gold immunolabeling of AMTN in the mineral deposits showed that protein molecules were associated with HA crystals. The binding affinity of rh-AMTN to HA was found to be comparable to that of amelogenin, the major protein of the forming enamel matrix. Overexpression of AMTN in mouse calvaria cells also increased the formation of calcium deposits in the culture medium. Overexpression of AMTN during the secretory stage of enamel formation in vivo resulted in rapid and uncontrolled enamel mineralization. Site-specific mutagenesis of the potential serine phosphorylation motif SSEEL reduced the in vitro mineral precipitation to less than 25%, revealing that this motif is important for the HA mineralizing function of the protein. A synthetic short peptide containing the SSEEL motif was only able to facilitate mineralization in its phosphorylated form ((P)S(P) SEEL), indicating that this motif is necessary but not sufficient for the mineralizing properties of AMTN. These findings demonstrate that AMTN has a direct influence on biomineralization by promoting HA mineralization and suggest a critical role for AMTN in the formation of the compact aprismatic enamel surface layer during the maturation stage of amelogenesis.
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Affiliation(s)
- Nastaran Abbarin
- Matrix Dynamics Group, Faculty of Dentistry, University of Toronto, Toronto, Canada
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Ishizaki H, Umemura K, Mineta H, Nozue M, Matsuoka I, Iwasaki K, Nishida Y. The examination of body sway in normal subjects and patients with Ménière's disease or cerebellar dysfunction. Adv Otorhinolaryngol 2015; 41:166-72. [PMID: 3265001 DOI: 10.1159/000416051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- H Ishizaki
- Department of Otorhinolaryngology, Hamamatsu University School of Medicine, Japan
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Iwasaki K, Kogo N, Dei M. Example Of Analysis Utilizing Real World Data: Medical Cost Reduction By Advising Untreated-Diabetes Patients To Visit Doctors. Value Health 2014; 17:A744. [PMID: 27202686 DOI: 10.1016/j.jval.2014.08.158] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
| | - N Kogo
- Milliman Inc., Tokyo, Japan
| | - M Dei
- Milliman Inc., Tokyo, Japan
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Iwasaki K, Kogo N, Dei M. Example of Analysis Utilizing Real World Data: Medical Cost Reduction of Combination Drugs. Value Health 2014; 17:A720-A721. [PMID: 27202550 DOI: 10.1016/j.jval.2014.08.016] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
| | - N Kogo
- Milliman Inc., Tokyo, Japan
| | - M Dei
- Milliman Inc., Tokyo, Japan
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Iwasaki K, Kogo N, Dei M. Example of Analysis Utilizing Real World Data: Medical Cost Reduction by Advising Untreated-Hypertension Patients to Visit Doctors. Value Health 2014; 17:A760. [PMID: 27202778 DOI: 10.1016/j.jval.2014.08.252] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
| | - N Kogo
- Milliman Inc., Tokyo, Japan
| | - M Dei
- Milliman Inc., Tokyo, Japan
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Kimura Y, Komaki M, Iwasaki K, Sata M, Izumi Y, Morita I. Recruitment of bone marrow-derived cells to periodontal tissue defects. Front Cell Dev Biol 2014; 2:19. [PMID: 25364726 PMCID: PMC4207018 DOI: 10.3389/fcell.2014.00019] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Accepted: 04/28/2014] [Indexed: 01/02/2023] Open
Abstract
Bone marrow-derived cells (BMCs) are considered to be a major source of mesenchymal stem cells (MSCs) in adults and are known to be effective in periodontal tissue regeneration. However, whether endogenous BMCs are involved in periodontal tissue repair process is uncertain. We therefore created periodontal tissue defects in the buccal alveolar bone of mandibular first molars in bone marrow chimeric mice, and immunohistochemically examined the expression of stromal cell derived factor-1 (SDF-1) and the mobilization of BMCs. We found that SDF-1 expression was increased around the defects at as early as 1 week after injury and that BMCs were mobilized to the defects, while GFP+/CD45+ were rarely observed. Fluorescence-activated cell sorting (FACS) analysis demonstrated that the number of platelet-derived growth factor receptor (pdgfr) α+/Sca-1+ (PαS) cells in the bone marrow decreased after injury. Taken together, these results suggest that BMCs are mobilized to the periodontal tissue defects. Recruitment of BMCs, including a subset of MSCs could be a new target of periodontal treatment.
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Affiliation(s)
- Yasuyuki Kimura
- Department of Periodontology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University Tokyo, Japan
| | - Motohiro Komaki
- Department of Nanomedicine (DNP), Graduate School of Medical and Dental Science, Tokyo Medical and Dental University Tokyo, Japan
| | - Kengo Iwasaki
- Department of Nanomedicine (DNP), Graduate School of Medical and Dental Science, Tokyo Medical and Dental University Tokyo, Japan
| | - Masataka Sata
- Department of Cardiovascular Medicine, Institute of Health Biosciences, The University of Tokushima Graduate School Tokushima, Japan
| | - Yuichi Izumi
- Department of Periodontology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University Tokyo, Japan ; Global Center of Excellence Program, International Research Center for Molecular Science in Tooth and Bone Diseases, Tokyo Medical and Dental University Tokyo, Japan
| | - Ikuo Morita
- Global Center of Excellence Program, International Research Center for Molecular Science in Tooth and Bone Diseases, Tokyo Medical and Dental University Tokyo, Japan ; Department of Cellular Physiological Chemistry, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University Tokyo, Japan
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Komaki M, Iwasaki K, Morita I. [Bone and Stem Cells. Mesenchymal stem cells and bone regeneration]. Clin Calcium 2014; 24:565-573. [PMID: 24681503] [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: 06/03/2023]
Abstract
Mesenchymal stem cells (MSCs) have multi-differentiation potency, and enhance wound healing in various kinds of disease. Recently MSC not only differentiate into tissue-forming cells, but also secrete various kinds of cytokines and chemokines that are anti-apoptotic, immunomodulatory, angiogenic, and the cell-mobilizing to influence extracellular environment. In addition, we show that MSC has a novel intercellular communication mechanism. It hopes to suggest ways to make safer and reliable usage of MSC in bone regeneration.
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Affiliation(s)
- Motohiro Komaki
- Tokyo Medical and Dental University Graduate School of Medeical and Dentai Science, Department of Nanomedicine (DNP) , Japan
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Muroi C, Fujioka M, Mishima K, Irie K, Fujimura Y, Nakano T, Fandino J, Keller E, Iwasaki K, Fujiwara M. Effect of ADAMTS-13 on cerebrovascular microthrombosis and neuronal injury after experimental subarachnoid hemorrhage. J Thromb Haemost 2014; 12:505-14. [PMID: 24476338 DOI: 10.1111/jth.12511] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2013] [Accepted: 12/17/2013] [Indexed: 11/30/2022]
Abstract
BACKGROUND Microthrombosis and reactive inflammation contribute to neuronal injury after subarachnoid hemorrhage (SAH). ADAMTS-13 cleaves von Willebrand factor multimers, and inhibits thrombus formation and, seemingly, inflammatory reactions. OBJECTIVE To investigate the effect of ADAMTS-13 in experimental SAH. METHODS A total of 100 male C57/BL6 mice were randomly assigned to four groups: sham (n = 15), SAH (n = 27), vehicle (n = 25), and ADAMTS-13 (n = 23; 100 μL per 10 g of body weight of 100 μg of ADAMTS-13 per 1 mL of 0.9% NaCl; 20 min after SAH). Neurologic performance was assessed on days 1 and 2 after SAH. Animals were killed on day 2. The amounts of subarachnoid blood, microthrombi, apoptosis and degenerative neurons were compared. The degree of neuronal inflammation and vasospasm was also compared. In five mice each (SAH and ADAMTS-13 groups), bleeding time was assessed 2 h after SAH. RESULTS Systemic administration of ADAMTS-13 achieved significant amelioration of microthrombosis and improvement in neurologic performance. ADAMTS-13 reduced the amount of apoptotic and degenerative neurons. A tendency for decreased neuronal inflammation was observed. ADAMTS-13 did not show any significant effect on vasospasm. The degree of systemic inflammation was not changed by ADAMTS-13 administration. ADAMTS-13 neither increased the amount of subarachnoid blood nor prolonged the bleeding time. CONCLUSIONS ADAMTS-13 may reduce neuronal injury after SAH by reducing microthrombosis formation and neuronal inflammation, thereby providing a new option for mitigating the severity of neuronal injury after SAH.
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Affiliation(s)
- C Muroi
- Department of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan; Institute of Aging and Brain Sciences, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan; Department of Neurosurgery, Kantonsspital Aarau, Aarau, Switzerland; Neurocritical Care Unit, Department of Neurosurgery, University Hospital Zurich, Zurich, Switzerland
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Norimura D, Isomoto H, Fukuda E, Yamao T, Ozawa E, Iwasaki K, Ohnita K, Takeshima F, Shikuwa S, Nakao K. Cowden's disease manifested by esophageal polyposis with characteristic appearance on magnifying endoscopy using narrow band imaging. Endoscopy 2014; 45 Suppl 2 UCTN:E298. [PMID: 24008475 DOI: 10.1055/s-0032-1310022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- D Norimura
- Department of Gastroenterology and Hepatology, Sasebo Municipal General Hospital, Sasebo, Japan.
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Iwasaki K, Komaki M, Yokoyama N, Tanaka Y, Taki A, Honda I, Kimura Y, Takeda M, Akazawa K, Oda S, Izumi Y, Morita I. Periodontal regeneration using periodontal ligament stem cell-transferred amnion. Tissue Eng Part A 2013; 20:693-704. [PMID: 24032400 DOI: 10.1089/ten.tea.2013.0017] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Periodontal disease is characterized by the destruction of tooth supporting tissues. Regeneration of periodontal tissues using ex vivo expanded cells has been introduced and studied, although appropriate methodology has not yet been established. We developed a novel cell transplant method for periodontal regeneration using periodontal ligament stem cell (PDLSC)-transferred amniotic membrane (PDLSC-amnion). The aim of this study was to investigate the regenerative potential of PDLSC-amnion in a rat periodontal defect model. Cultured PDLSCs were transferred onto amniotic membranes using a glass substrate treated with polyethylene glycol and photolithography. The properties of PDLSCs were investigated by flow cytometry and in vitro differentiation. PDLSC-amnion was transplanted into surgically created periodontal defects in rat maxillary molars. Periodontal regeneration was evaluated by microcomputed tomography (micro-CT) and histological analysis. PDLSCs showed mesenchymal stem cell-like characteristics such as cell surface marker expression (CD90, CD44, CD73, CD105, CD146, and STRO-1) and trilineage differentiation ability (i.e., into osteoblasts, adipocytes, and chondrocytes). PDLSC-amnion exhibited a single layer of PDLSCs on the amniotic membrane and stability of the sheet even with movement and deformation caused by surgical instruments. We observed that the PDLSC-amnion enhanced periodontal tissue regeneration as determined by micro-CT and histology by 4 weeks after transplantation. These data suggest that PDLSC-amnion has therapeutic potential as a novel cell-based regenerative periodontal therapy.
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Affiliation(s)
- Kengo Iwasaki
- 1 Department of Nanomedicine (DNP), Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University , Tokyo, Japan
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Sawabe M, Aoki A, Komaki M, Iwasaki K, Ogita M, Izumi Y. Gingival tissue healing following Er:YAG laser ablation compared to electrosurgery in rats. Lasers Med Sci 2013; 30:875-83. [PMID: 24241972 DOI: 10.1007/s10103-013-1478-z] [Citation(s) in RCA: 16] [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] [Received: 08/01/2013] [Accepted: 10/21/2013] [Indexed: 10/26/2022]
Abstract
The erbium-doped yttrium aluminum garnet (Er:YAG) laser is currently used for periodontal soft tissue management with favorable outcomes. However, the process of wound healing after Er:YAG laser (ErL) treatment has not been fully elucidated yet. The aim of this study was to investigate the gingival tissue healing after ErL ablation in comparison with that after electrosurgery (ElS). Gingival defects were created in 28 rats by ablation with ErL irradiation or ElS. The chronological changes in wound healing were evaluated using histological, histometrical, and immunohistochemical analyses. The ErL-ablated gingival tissue revealed much less thermal damage, compared to the ElS. In the ElS sites, the postoperative tissue destruction continued due to thermal damage, while in the ErL sites, tissue degradation was limited and the defects were re-epithelialized early. Heat shock protein (Hsp) 72/73 expression was detected abundantly remote from the wound in the ElS, whereas it was slightly observed in close proximity to the wound in the ErL sites. Hsp47 expression was observed in the entire connective tissue early in the wound healing and was found limited in the wound area later. This phenomenon proceeded faster in the ErL sites than in the ElS sites. Expression of proliferating cell nuclear antigen (PCNA) persisted in the epithelial tissue for a longer period in the ElS than that in the ErL. The ErL results in faster and more favorable gingival wound healing compared to the ElS, suggesting that the ErL is a safe and suitable tool for periodontal soft tissue management.
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Affiliation(s)
- Masanori Sawabe
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
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Iwasaki K, Komaki M, Yokoyama N, Tanaka Y, Taki A, Kimura Y, Takeda M, Oda S, Izumi Y, Morita I. Periodontal Ligament Stem Cells Possess the Characteristics of Pericytes. J Periodontol 2013; 84:1425-33. [DOI: 10.1902/jop.2012.120547] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Tokumine J, Lefor AT, Yonei A, Kagaya A, Iwasaki K, Fukuda Y. Three-step method for ultrasound-guided central vein catheterization. Br J Anaesth 2013; 110:368-73. [PMID: 23131458 DOI: 10.1093/bja/aes381] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND The long-axis view and in-plane needle approach (LAX-IP) for ultrasound-guided central vein catheterization is considered ideal because of the quality of real-time imaging. We describe a novel technique, using a step-by-step procedure, to overcome the pitfalls associated with the LAX-IP. This study was undertaken to demonstrate the clinical utility of this approach. METHODS All operators underwent training before participation in this study. One hundred patients were enrolled in this study and underwent central venous catheterization using this method. Using a portable ultrasound and vein catheterization kit, patients were appropriately positioned and a straight portion of the vein identified (Step 1). A needle guide was used (Step 2) and the vein imaged in real time in two directions (Step 3), to identify the true long axis and prevent damage to surrounding tissues. RESULTS The overall success rate for catheterization was 100% with a median of one puncture for each patient. All catheterizations were performed within three punctures. Problems with the first puncture included difficult insertion of the guide-wire due to coiling, difficult anterior wall puncture, less experience with the procedure, and other reasons. There were no complications associated with the procedure. CONCLUSIONS This three-step method is not dependent on an operator's ability to proceed based on spatial awareness, but rather depends on logic. This method can prevent difficulties associated with a two-dimensional ultrasound view, and may be a safer technique compared with others. Further clinical trials are needed to establish the safety of this technique.
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Affiliation(s)
- J Tokumine
- Department of Anesthesia, Seikei-kai Chiba Medical Center, 1-11-12, Minami-cho, Chuo-ku, Chiba-shi 260-0842, Japan.
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Iwasaki K, Obara W, Kato Y, Takata R, Tanji S, Fujioka T. Neoadjuvant Gemcitabine Plus Carboplatin for Locally Advanced Bladder Cancer. Jpn J Clin Oncol 2012; 43:193-9. [DOI: 10.1093/jjco/hys213] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [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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Bhakta JN, Ohnishi K, Munekage Y, Iwasaki K, Wei MQ. Characterization of lactic acid bacteria-based probiotics as potential heavy metal sorbents. J Appl Microbiol 2012; 112:1193-206. [PMID: 22404232 DOI: 10.1111/j.1365-2672.2012.05284.x] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIM To isolate and characterize lactic acid bacteria (LAB) and determine whether they could potentially be used as heavy metal (cadmium and lead) absorbing probiotics. METHODS AND RESULTS The study used 53 environmental (mud and sludge) samples to isolate cadmium- and lead-resistant LAB, by following spared plate technique. A total of 255 cadmium- and lead-resistant LAB were isolated from these samples. The survival of 26 of the LAB was found after passing through sequential probiotic characterizations. These 26 probiotic LAB exhibited remarkable variations in their metal-resistant and metal-removal abilities. Of 26, seven (Cd54-2, Cd61-7, Cd69-12, Cd70-13, Pb82-8, Pb96-19 and Cd109-16) and four (Pb71-1, Pb73-2, Pb85-9 and Pb96-19) strains displayed relatively elevated cadmium- and lead-removal efficiencies from water, respectively, compare with that of the remaining strains. Strains Cd70-13 and Pb71-1 showed the highest cadmium (25%) and lead (59%) removal capacity from MRS (De Man, Rogosa and Sharpe) culture medium, respectively, amongst the selected strains and showed a good adhesive ability on fish mucus. A phylogenetic analysis of their 16S rDNA sequences revealed that the strains Cd70-13 and Pb71-1 belong to Lactobacillus reuteri. CONCLUSION Excellent probiotic, metal sorption and adhesive characteristics of newly identified Lact. reuteri strains Cd70-13 and Pb71-1 were isolated, which indicated their high potential abilities to survive in the intestinal milieu and to uptake the tested metals from the environment. SIGNIFICANCE AND IMPACT OF THE STUDY To our knowledge, this is the first study that has aimed to isolate, characterize and identify metal-resistant LAB strains that have potential to be a probiotic candidate for food and in vivo challenge studies in the intestinal milieu of fish for the uptake and control of heavy metal bioaccumulation.
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Affiliation(s)
- J N Bhakta
- Research Institute of Molecular Genetics, Faculty of Agriculture, Kochi University, Monobe, Nankoku, Kochi, Japan
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Iwasaki K, Kikuchi A, Takeda A, Satoh T, Sawada JI, Konno H, Takahashi T, Takayama S, Tobita M, Yaegashi N. 1.257 A CROSSOVER STUDY OF A TRADITIONAL ASIAN HERBAL MEDICINE FOR HUNTINGTON'S DISEASE. Parkinsonism Relat Disord 2012. [DOI: 10.1016/s1353-8020(11)70315-7] [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: 10/14/2022]
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