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Kohno T, Kitagawa H, Tsuboi R, Deng F, Sakai H, Wu T, Fan YS, Xiao L, Imazato S. Development of Antibacterial Resin Composites Incorporating Poly(METAC) Clusters. Materials (Basel) 2024; 17:896. [PMID: 38399151 PMCID: PMC10889979 DOI: 10.3390/ma17040896] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 02/09/2024] [Accepted: 02/09/2024] [Indexed: 02/25/2024]
Abstract
This study examined the antibacterial effects and physical properties of a novel resin composite incorporating poly[{2-(methacryloyloxy)ethyl}trimethylammonium chloride] (poly(METAC)), a methacrylate cationic polymer comprising quaternary ammonium compounds (QACs). Resin composites incorporating poly(METAC) were fabricated by adding 6 wt.% METAC aqueous solution to a commercially available resin composite. The FE-SEM/EDS and Raman spec-troscopy analyses showed that METAC was assembled and polymerized in the resin composites after curing. The antibacterial effect was evaluated by inoculating Streptococcus mutans or Strepto-coccus sobrinus suspensions on the surface of cured resin composites, and the experimental resin composites incorporating poly(METAC) clusters exhibited bactericidal effects even after 28 days of ageing. The physical properties of the experimental resin composites were within the ISO-stipulated ranges. Newly fabricated resin composites containing the QAC-based poly(METAC) cluster ex-hibited long-term bactericidal effects against oral bacteria on their surfaces and demonstrated ac-ceptable physical properties for clinical use.
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Affiliation(s)
- Tomoki Kohno
- Joint Research Laboratory of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Haruaki Kitagawa
- Joint Research Laboratory of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
- Department of Dental Biomaterials, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Ririko Tsuboi
- Department of Cariology, Restorative Sciences and Endodontics, University of Michigan School of Dentistry, 1011 N University Ave, Ann Arbor, MI 48109, USA
| | - Fan Deng
- Department of Dental Biomaterials, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hirohiko Sakai
- Department of Dental Biomaterials, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Tingyi Wu
- Department of Dental Biomaterials, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yo-Shiuan Fan
- Department of Dental Biomaterials, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Linghao Xiao
- Joint Research Laboratory of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Satoshi Imazato
- Joint Research Laboratory of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
- Department of Dental Biomaterials, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
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Abe GL, Sasaki JI, Tsuboi R, Kohno T, Kitagawa H, Imazato S. Poly(lactic acid/caprolactone) bilayer membrane achieves bone regeneration through a prolonged barrier function. J Biomed Mater Res B Appl Biomater 2024; 112:e35365. [PMID: 38247248 DOI: 10.1002/jbm.b.35365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 11/16/2023] [Accepted: 11/29/2023] [Indexed: 01/23/2024]
Abstract
Guided bone regeneration (GBR) is a treatment strategy used to recover bone volume. Barrier membranes are a key component of GBR protocols, and their properties can impact treatment outcomes. This study investigated the efficacy of an experimental, slow-degrading, bilayer barrier membrane for application in GBR using in vivo animal models. A synthetic copolymer of poly(lactic acid/caprolactone) (PLCL) was used to prepare a slow-degrading bilayer membrane. The biodegradability of PLCL was evaluated by subcutaneous implantation in a rat model. The barrier function of the PLCL membrane was investigated in a rat calvaria defect model and compared with commercially available membranes composed of type I collagen (Col) and poly(lactic-co-glycolic acid) (PLGA). An alveolar bone defect model in beagle dogs was used to simulate GBR protocols to evaluate the bone regeneration ability of the experimental PLCL membrane. The PLCL membrane showed slow biodegradation, resulting in an efficient and prolonged barrier function compared with commercial materials. In turn, this barrier function enabled the space-making ability of PLCL membrane and facilitated bone regeneration. In the alveolar bone defect model, significantly greater regeneration was achieved by treatment with PLCL membrane compared with Col and PLGA membranes. Additionally, a continuous alveolar ridge contour was observed in PLCL-treated bone defects. In conclusion, the PLCL bilayer membrane is a promising biomaterial for use in GBR given its slow degradation and prolonged barrier function.
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Affiliation(s)
- Gabriela L Abe
- Department of Dental Biomaterials, Osaka University Graduate School of Dentistry, Osaka, Japan
- Joint Research Laboratory of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Jun-Ichi Sasaki
- Department of Dental Biomaterials, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Ririko Tsuboi
- Department of Cariology, Restorative Sciences and Endodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Tomoki Kohno
- Joint Research Laboratory of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Haruaki Kitagawa
- Department of Dental Biomaterials, Osaka University Graduate School of Dentistry, Osaka, Japan
- Joint Research Laboratory of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Satoshi Imazato
- Department of Dental Biomaterials, Osaka University Graduate School of Dentistry, Osaka, Japan
- Joint Research Laboratory of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, Osaka, Japan
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L Abe G, Tsuboi R, Kitagawa H, Sasaki JI, Li A, Kohno T, Imazato S. Poly(lactic acid/caprolactone) bilayer membrane blocks bacterial penetration. J Periodontal Res 2022; 57:510-518. [PMID: 35212414 DOI: 10.1111/jre.12980] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [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: 12/07/2021] [Revised: 01/18/2022] [Accepted: 02/14/2022] [Indexed: 12/22/2022]
Abstract
BACKGROUND AND OBJECTIVE The clinical outcomes of guided tissue regeneration (GTR) or guided bone regeneration (GBR) procedures can be impaired if a bacterial infection develops at the surgical site. Membrane exposure is one of the causes of the onset of bacterial infection. Previously, we have fabricated a poly(lactic acid/caprolactone) (PLCL) bilayer membrane composed of a porous layer and a compact layer. The compact layer acts as a barrier against connective tissue and epithelial cells, and we hypothesized that it could also be an effective barrier against bacterial cells. The objective of this study was to evaluate the ability of the PLCL bilayer membrane to block bacterial cell penetration, which would be useful for preventing postoperative infections. METHODS Porphyromonas gingivalis, Streptococcus mutans, and multispecies bacteria collected from human saliva were used in this study. Bacteria were seeded directly on the compact layer of a PLCL bilayer membrane, and bacterial adhesion to the membrane, as well as penetration into the membrane's structure, were assessed. Bacterial adhesion was evaluated by the number of colonies formed at 6, 24, and 72 h, and penetration was observed using a scanning electron microscope at 24 and 72 h. Commercially available membranes, composed of poly(lactic-co-glycolic acid) or type I collagen, were used as controls. RESULTS P. gingivalis, S. mutans, and the multispecies bacteria obtained from human saliva adhered onto all the membranes after only 6 h of incubation. However, fewer adherent cells were observed for the PLCL bilayer membrane compared with the controls for all experimental periods. The PLCL membrane was capable of blocking bacterial penetration, and no bacterial cells were observed in the structure. In contrast, bacteria penetrated both the control membranes and were observed at depths of up to 80 µm after 72 h of incubation. CONCLUSION Membrane characteristics may influence how bacterial colonization occurs. The PLCL membrane had reduced bacterial adhesion and blocked bacterial penetration, and these characteristics could contribute to a favorable outcome for regenerative treatments. In the event of membrane exposure at GTR/GBR surgical sites, membranes with an efficient barrier function, such as the PLCL bilayer membrane, could simplify the management of GTR/GBR complications.
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Affiliation(s)
- Gabriela L Abe
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - Ririko Tsuboi
- Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - Haruaki Kitagawa
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - Jun-Ichi Sasaki
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - Aonan Li
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - Tomoki Kohno
- Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - Satoshi Imazato
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan.,Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
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Kohno T, Tsuboi R, Kitagawa H, Imazato S. Development of Antibacterial Resin Composites Containing a QAC-Based Monomer METAC. Dent Mater 2022. [DOI: 10.1016/j.dental.2021.12.067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Liu Y, Kohno T, Tsuboi R, Thongthai P, Fan D, Sakai H, Kitagawa H, Imazato S. Antibacterial effects and physical properties of a glass ionomer cement containing BioUnion filler with acidity-induced ability to release zinc ion. Dent Mater J 2021; 40:1418-1427. [PMID: 34334508 DOI: 10.4012/dmj.2021-052] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BioUnion filler is a bioactive glass particle that releases Zn2+ in an acidic environment. In this study, the ion release, antibacterial, and physical properties of a glass ionomer cement (GIC) incorporating BioUnion filler (CA) were assessed in vitro. The concentration of Zn2+ released from CA into acetic acid was higher than that released into water and its minimum inhibitory concentrations against six oral bacterial species. Moreover, the concentration of Zn2+-release was maintained during all the seven times it was exposed to acetic acid. Compared to a conventional cement and resin composite, CA significantly inhibited the growth of oral bacteria and hindered their adhesion on the material surface. Thus, our study outcomes show that the release of Zn2+ from CA in the acidic environment does not affect its compressive strength.
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Affiliation(s)
- Yuhan Liu
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
| | - Tomoki Kohno
- Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry
| | - Ririko Tsuboi
- Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry
| | - Pasiree Thongthai
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
| | - Deng Fan
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
| | - Hirohiko Sakai
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry.,Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Haruaki Kitagawa
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
| | - Satoshi Imazato
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry.,Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry
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Abstract
Background: In dentistry, barrier membranes are used for guided tissue regeneration (GTR) and guided bone regeneration (GBR). Various membranes are commercially available and extensive research and development of novel membranes have been conducted. In general, membranes are required to provide barrier function, biosafety, biocompatibility and appropriate mechanical properties. In addition, membranes are expected to be bioactive to promote tissue regeneration. Objectives: This review aims to organize the fundamental characteristics of the barrier membranes that are available and studied for dentistry, based on their components. Results: The principal components of barrier membranes are divided into nonbiodegradable and biodegradable materials. Nonbiodegradable membranes are manufactured from synthetic polymers, metals or composites of these materials. The first reported barrier membrane was made from expanded polytetrafluoroethylene (e-PTFE). Titanium has also been applied for dental regenerative therapy and shows favorable barrier function. Biodegradable membranes are mainly made from natural and synthetic polymers. Collagens are popular materials that are processed for clinical use by cross-linking. Aliphatic polyesters and their copolymers have been relatively recently introduced into GTR and GBR treatments. In addition, to improve the tissue regenerative function and mechanical strength of biodegradable membranes, inorganic materials such as calcium phosphate and bioactive glass have been incorporated at the research stage. Conclusions: Currently, there are still insufficient guidelines for barrier membrane choice in GTR and GBR, therefore dentists are required to understand the characteristics of barrier membranes.
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Affiliation(s)
- Jun-Ichi Sasaki
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Suita, Japan
| | - Gabriela L Abe
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Suita, Japan
| | - Aonan Li
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Suita, Japan
| | - Pasiree Thongthai
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Suita, Japan
| | - Ririko Tsuboi
- Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, Suita, Japan
| | - Tomoki Kohno
- Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, Suita, Japan
| | - Satoshi Imazato
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Suita, Japan.,Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, Suita, Japan
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Kitagawa H, Kitagawa R, Tsuboi R, Hirose N, Thongthai P, Sakai H, Ueda M, Ono S, Sasaki JI, Ooya T, Imazato S. Development of endodontic sealers containing antimicrobial-loaded polymer particles with long-term antibacterial effects. Dent Mater 2021; 37:1248-1259. [PMID: 33972098 DOI: 10.1016/j.dental.2021.04.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 04/02/2021] [Accepted: 04/24/2021] [Indexed: 12/17/2022]
Abstract
OBJECTIVE The objective of this study is to prepare new dental resins with a long-lasting antimicrobial activity. Specifically, this study evaluates an approach for controlling infection in root canals using sealers containing polyhydroxyethyl methacrylate trimethylolpropane trimethacrylate (polyHEMA/TMPT) particles loaded with cetylpyridinium chloride (CPC). In addition, the physical properties of sealers containing CPC-loaded polyHEMA/TMPT particles (CLP) are determined. METHODS PolyHEMA/TMPT particles with 10 (10%-CLP) and 25wt.% CPC (25%-CLP) with different particle sizes were fabricated and incorporated in HEMA-based sealers. CPC-release profiles were evaluated over 14 days of immersion in water, followed by 14 days of storage and 14 days of water immersion. The antibacterial activity of these sealers against Enterococcus faecalis in dentinal tubules was assessed using a root-canal-infection model. Their sealing abilities were evaluated by fluid filtration and physical properties were tested according to the ISO 6876 standard. The long-term antibacterial activity of the cured sealer containing 25%-CLP (∼21μm particle diameter) was re-assessed after 1 year of storage. RESULTS After 28 days of immersion, 25%-CLP exhibited a higher and sustained CPC release unlike 10%-CLP. Residual bacteria in root dentinal tubules were eradicated by obturation with 25%-CLP-containing sealers. The incorporation of 25%-CLP (∼21μm) had no adverse effects on the sealing ability and physical properties of the sealer and resulted in long-term antibacterial activity. SIGNIFICANCE The incorporation of CPC-loaded particles in HEMA resins yielded endodontic sealers with long-term bactericidal activity against E. faecalis in root canals. These sealers can potentially be used to prevent recurrent apical periodontitis.
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Affiliation(s)
- Haruaki Kitagawa
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Ranna Kitagawa
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Ririko Tsuboi
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Nanako Hirose
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Pasiree Thongthai
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hirohiko Sakai
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Mayuka Ueda
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Shunka Ono
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Jun-Ichi Sasaki
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Tooru Ooya
- Graduate School of Engineering, Kobe University, 1-1 Rokkoudai, Nada, Kobe, Hyogo 657-8501, Japan
| | - Satoshi Imazato
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
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Kohno T, Liu Y, Tsuboi R, Kitagawa H, Imazato S. Evaluation of ion release and the recharge ability of glass-ionomer cement containing BioUnion filler using an in vitro saliva-drop setting assembly. Dent Mater 2021; 37:882-893. [PMID: 33714622 DOI: 10.1016/j.dental.2021.02.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 10/18/2020] [Revised: 02/17/2021] [Accepted: 02/24/2021] [Indexed: 11/19/2022]
Abstract
OBJECTIVE A glass-ionomer cement (GIC) containing BioUnion filler has been reported to release Zn2+ under acidic conditions and to inhibit oral bacteria on its surface. However, previous results are based on in vitro experiments under static conditions. This study aimed to assemble an in vitro saliva-drop setting to simulate in vivo conditions of the oral cavity and to investigate the ion releasing and recharging properties of the GIC containing BioUnion filler. METHODS The effective concentrations of Zn2+ and F- against Streptococcus mutans and saliva-derived multi-species biofilms were determined. Artificial saliva was dropped on the GIC containing BioUnion filler using the in vitro saliva-drop setting assembly and was periodically replaced with acetic acid. Ion release/recharge properties were investigated by measuring the release concentrations of Zn2+ and F-. RESULTS The concentration of Zn2+ released from the BioUnion filler-containing GIC during seven days with repeated exposure to acid could be maintained at the level to inhibit S. mutans and saliva-derived multi-species biofilm formation. Moreover, the BioUnion filler-containing GIC could be recharged with Zn2+ and F- by the application of a tooth gel containing Zn2+ and F-. The release concentration of Zn2+ after recharging was significantly higher than the effective concentration of Zn2+ to hinder S. mutans and saliva-derived multi-species biofilm formation on material surfaces. SIGNIFICANCE The GIC containing BioUnion filler was shown to have the potential to inhibit biofilm formation in the oral cavity. In addition, recharging Zn2+ and F- would further enhance the effect of the GIC containing BioUnion filler.
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Affiliation(s)
- Tomoki Kohno
- Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Yuhan Liu
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Ririko Tsuboi
- Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Haruaki Kitagawa
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Satoshi Imazato
- Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan; Department of Biomaterials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
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Tsuboi R, Kitagawa H, Imazato S. FGF-2 release and bonding/physical properties of 4-META/MMA-based adhesive resins incorporating small FGF-2-loaded polymer particles. Dent Mater 2020; 36:1586-1594. [DOI: 10.1016/j.dental.2020.09.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 06/18/2020] [Accepted: 09/10/2020] [Indexed: 11/28/2022]
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Harada K, Irisawa R, Ito T, Uchiyama M, Tsuboi R. The effectiveness of dupilumab in patients with alopecia areata who have atopic dermatitis: a case series of seven patients. Br J Dermatol 2020; 183:396-397. [PMID: 32118289 DOI: 10.1111/bjd.18976] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- K Harada
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - R Irisawa
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - T Ito
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - M Uchiyama
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - R Tsuboi
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
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Matsumoto Y, Abe N, Tobita R, Kawakami H, Nakayama H, Setoguchi Y, Tsuboi R, Okubo Y. The risk of interstitial lung disease during biological treatment in Japanese patients with psoriasis. Clin Exp Dermatol 2020; 45:853-858. [PMID: 32356612 DOI: 10.1111/ced.14259] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 04/18/2020] [Accepted: 04/21/2020] [Indexed: 12/31/2022]
Abstract
BACKGROUND With the increasing use of biological agents for the treatment of psoriasis, the numbers of patients with interstitial lung disease (ILD) associated with biologics have also increased. Many of these cases were associated with tumour necrosis factor (TNF)-α inhibitors, but cases associated with other families of biologics have also been reported in Japan. AIM To analyse the background factors of patients who developed ILD, and to discuss better management of biological treatment. METHOD We reviewed 246 patients with psoriasis who were treated with biological agents in our department to identify any pulmonary adverse events (AEs). Data on patients who developed ILD were extracted to analyse background factors, clinical type of psoriasis, time to onset of ILD, pre-existing ILD, smoking habit and prescribed drugs. RESULTS Pulmonary AEs were seen in 22 cases, of which 11 were diagnosed as drug-induced ILD. The causative drugs were mainly TNF-α inhibitors, accounting for eight cases (six treated with infliximab, two with adalimumab). The remaining three cases were associated with secukinumab, ustekinumab and ixekizumab (n = 1 each). Notably, these three cases also had a history of drug-induced ILD. CONCLUSION Patients with a history of drug-induced ILD seem to be more susceptible to developing another ILD induced by biologics, even if treated with interleukin-17 inhibitors. Thorough screening of risk factors and evaluation for eligibility, and careful monitoring during treatment are the best solutions to avoid serious pulmonary AE. Early detection and precise diagnosis of pulmonary AEs, especially differentiation from infectious diseases, is essential for managing biological treatment.
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Affiliation(s)
- Y Matsumoto
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - N Abe
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - R Tobita
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - H Kawakami
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - H Nakayama
- Department of Respiratory Medicine, Tokyo Medical University, Tokyo, Japan
| | - Y Setoguchi
- Department of Pulmonology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - R Tsuboi
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - Y Okubo
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
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Abe GL, Sasaki JI, Katata C, Kohno T, Tsuboi R, Kitagawa H, Imazato S. Fabrication of novel poly(lactic acid/caprolactone) bilayer membrane for GBR application. Dent Mater 2020; 36:626-634. [DOI: 10.1016/j.dental.2020.03.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 03/03/2020] [Accepted: 03/12/2020] [Indexed: 12/11/2022]
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Liu Y, Kohno T, Tsuboi R, Kitagawa H, Imazato S. Acidity-induced release of zinc ion from BioUnion TM filler and its inhibitory effects against Streptococcus mutans. Dent Mater J 2020; 39:547-553. [PMID: 32092722 DOI: 10.4012/dmj.2019-061] [Citation(s) in RCA: 13] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BioUnion filler incorporated into restorative/coating materials is a new bio-functional glass powder. The most unique function of BioUnion filler is its ability to release Zn2+ in acidic environments. In this study, the ion release profile of BioUnion filler under acidic conditions and its antibacterial effects against Streptococcus mutans were evaluated. The concentrations of Zn2+ released from BioUnion fillers into acetic acids were greater than those released into water. S. mutans inhibition by BioUnion fillers was greater with sucrose than without sucrose, reflecting a decrease in suspension pH in response to the addition of sucrose. Exposure to acids increased Zn2+ release from BioUnion fillers, and the fillers after repeated exposure to acids demonstrated inhibitory effects against S. mutans. These findings suggest that BioUnion filler accelerated the release of Zn2+ under acidic conditions, which induced bactericidal/inhibitory effects against S. mutans.
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Affiliation(s)
- Yuhan Liu
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
| | - Tomoki Kohno
- Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry
| | - Ririko Tsuboi
- Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry
| | - Haruaki Kitagawa
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
| | - Satoshi Imazato
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry.,Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry
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Imazato S, Kohno T, Tsuboi R, Thongthai P, Xu HH, Kitagawa H. Cutting-edge filler technologies to release bio-active components for restorative and preventive dentistry. Dent Mater J 2020; 39:69-79. [PMID: 31932551 DOI: 10.4012/dmj.2019-350] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Advancements in materials used for restorative and preventive treatment is being directed toward "bio-active" functionality. Incorporation of filler particles that release active components is a popular method to create bio-active materials, and many approaches are available to develop fillers with the ability to release components that provide "bio-protective" or "bio-promoting" properties; e.g. metal/calcium phosphate nanoparticles, multiple ion-releasing glass fillers, and non-biodegradable polymer particles. In this review paper, recent developments in cutting-edge filler technologies to release bio-active components are addressed and summarized according to their usefulness and functions, including control of bacterial infection, tooth strengthening, and promotion of tissue regeneration.
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Affiliation(s)
- Satoshi Imazato
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry.,Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry
| | - Tomoki Kohno
- Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry
| | - Ririko Tsuboi
- Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry
| | - Pasiree Thongthai
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
| | - Hockin Hk Xu
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry
| | - Haruaki Kitagawa
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
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15
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Miyai M, Hiruma J, Motoyama A, Egawa M, Yamamoto M, Ozeki Y, Tsuboi R, Hibino T. 240 SerpinB12 is an intrinsic mesotrypsin inhibitor regulating corneocyte desquamation and enucleation. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Sasaki J, Yoshimoto I, Katata C, Tsuboi R, Imazato S. Freeze‐dry processing of three‐dimensional cell constructs for bone graft materials. J Biomed Mater Res B Appl Biomater 2019; 108:958-964. [DOI: 10.1002/jbm.b.34448] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 05/30/2019] [Accepted: 07/11/2019] [Indexed: 12/20/2022]
Affiliation(s)
- Jun‐Ichi Sasaki
- Department of Biomaterials ScienceOsaka University Graduate School of Dentistry Osaka Japan
| | - Itsumi Yoshimoto
- Department of Biomaterials ScienceOsaka University Graduate School of Dentistry Osaka Japan
| | - Chihiro Katata
- Department of Biomaterials ScienceOsaka University Graduate School of Dentistry Osaka Japan
- Department of Restorative Dentistry and EndodontologyOsaka University Graduate School of Dentistry Osaka Japan
| | - Ririko Tsuboi
- Department of Advanced Functional Materials ScienceOsaka University Graduate School of Dentistry Osaka Japan
| | - Satoshi Imazato
- Department of Biomaterials ScienceOsaka University Graduate School of Dentistry Osaka Japan
- Department of Advanced Functional Materials ScienceOsaka University Graduate School of Dentistry Osaka Japan
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17
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Matsumoto Y, Harada K, Maeda T, Egusa C, Hirano H, Okubo Y, Tsuboi R. Molecular detection of fungal and bacterial DNA from pustules in patients with palmoplantar pustulosis: special focus on Malassezia species. Clin Exp Dermatol 2019; 45:36-40. [PMID: 31220362 DOI: 10.1111/ced.14026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/14/2019] [Indexed: 12/20/2022]
Abstract
BACKGROUND Palmoplantar pustulosis (PPP) is a distinct, chronic skin disorder characterized by intraepidermal pustules on the palms and soles. It is hypothesized that microorganisms on the skin might induce the symptoms of PPP via inflammatory cell activation. However, the microbiota has not been studied in detail because of the assumption that the pustules in PPP are sterile. AIM To elucidate the role of microorganisms in pathogenesis of PPP. METHODS PCR analysis was performed of microbial DNA fragments in the pustules of patients with PPP. The sequence of the D1/D2 LSU 26s rRNA gene and that of the 16S rRNA gene was used for fungal and bacterial DNA detection, respectively. RESULTS In total, 71 samples were carefully collected from the pustules of patients with PPP. Fungal DNA bands were detected in 68 samples, and fungi including Malassezia spp. were identified in 30 of 71 samples (42.3%). Malassezia restricta was the most frequently encountered fungus (14/71; 19.7%). However, bacterial DNA was not detected by the methods used. Furthermore, identical fungal DNA was not detected in the outer lid of the pustules, suggesting that the fungi detected within the pustule did not derive from contamination via the skin surface. CONCLUSIONS In the present study, we demonstrated for the first time that certain pustules in patients with PPP contain fungal DNA fragments, especially those of Malassezia spp. Our findings provide new insights on the role of skin microbiota in the pathogenesis of PPP.
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Affiliation(s)
- Y Matsumoto
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - K Harada
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - T Maeda
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - C Egusa
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - H Hirano
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - Y Okubo
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - R Tsuboi
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
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18
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Kiriyama N, Kanzaki A, Maeda T, Irisawa R, Tsuboi R, Harada K. [ 18 F]-Fluorodeoxy-D-glucose uptake in prurigo nodules induced by the membranous expression of glucose transporter. Clin Exp Dermatol 2019; 44:e161-e163. [PMID: 30816575 DOI: 10.1111/ced.13957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/26/2019] [Indexed: 11/29/2022]
Affiliation(s)
- N Kiriyama
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - A Kanzaki
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - T Maeda
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - R Irisawa
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - R Tsuboi
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - K Harada
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
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19
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Mae K, Irisawa R, Saito M, Kato Y, Hirayama M, Tsuboi R, Harada K. Collision tumour of extramammary Paget disease and melanoma. Clin Exp Dermatol 2018; 44:e61-e62. [PMID: 30548298 DOI: 10.1111/ced.13854] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/31/2018] [Indexed: 11/26/2022]
Affiliation(s)
- K Mae
- Department of Dermatology, Tokyo Medical University, 6-7-1 Nishi-shinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
| | - R Irisawa
- Department of Dermatology, Tokyo Medical University, 6-7-1 Nishi-shinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
| | - M Saito
- Department of Dermatology, Tokyo Medical University, 6-7-1 Nishi-shinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
| | - Y Kato
- Department of Dermatology, Tokyo Medical University, 6-7-1 Nishi-shinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
| | - M Hirayama
- Department of Dermatology, Tokyo Medical University, 6-7-1 Nishi-shinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
| | - R Tsuboi
- Department of Dermatology, Tokyo Medical University, 6-7-1 Nishi-shinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
| | - K Harada
- Department of Dermatology, Tokyo Medical University, 6-7-1 Nishi-shinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
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20
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Kanzaki A, Kato Y, Kariya T, Kanda Y, Shirai K, Arai T, Tsuboi R. Response of basal cell carcinoma to imiquimod was associated with the Gli1 : Gli3 expression ratio. Br J Dermatol 2018; 179:1406-1407. [PMID: 30019418 DOI: 10.1111/bjd.17015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A Kanzaki
- Department of Dermatology, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan.,Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - Y Kato
- Department of Dermatology, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan.,Department of Dermatology, Tokyo Medical University Hachioji Medical Center, 1163 Tatemachi, Hachioji, Tokyo, 193-0944, Japan
| | - T Kariya
- Department of Dermatology, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan.,Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - Y Kanda
- Department of Dermatology, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan.,Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - K Shirai
- Department of Dermatology, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan.,Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - T Arai
- Department of Dermatology, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan.,Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - R Tsuboi
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
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21
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Okubo Y, Tobita R, Egusa C, Abe N, Maeda T, Tsuboi R. 464 Analysis of IL36RN and CARD14 gene mutation in Japanese patients with generalized pustular psoriasis and palmoplanter pustulosis. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.471] [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]
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22
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Kato Y, Fukuhara Y, Kanzaki A, Mae K, Irisawa R, Harada K, Tsuboi R, Nagatani T. 171 Combination therapy with MST-16 and VP-16 for tumor stage mycosis fungoides. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Tsuboi R, Sasaki JI, Kitagawa H, Yoshimoto I, Takeshige F, Imazato S. Development of a novel dental resin cement incorporating FGF-2-loaded polymer particles with the ability to promote tissue regeneration. Dent Mater 2018; 34:641-648. [DOI: 10.1016/j.dental.2018.01.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 01/10/2018] [Accepted: 01/10/2018] [Indexed: 11/16/2022]
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24
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Yoshimoto I, Sasaki JI, Tsuboi R, Yamaguchi S, Kitagawa H, Imazato S. Development of layered PLGA membranes for periodontal tissue regeneration. Dent Mater 2018; 34:538-550. [DOI: 10.1016/j.dental.2017.12.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 11/30/2017] [Accepted: 12/21/2017] [Indexed: 12/29/2022]
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25
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Numata T, Nagatani T, Shirai K, Maeda T, Mae K, Nakasu M, Saito M, Usuda T, Tsuboi R, Okubo Y. Sézary syndrome managed with histone deacetylase inhibitor followed by anti-CCR4 monoclonal antibody. Clin Exp Dermatol 2018; 43:281-285. [PMID: 29327377 DOI: 10.1111/ced.13357] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/17/2017] [Indexed: 11/30/2022]
Abstract
A 70-year-old man presented to our clinic with a 10-year history of recurrent pruritic erythema and plaques on his trunk and limbs. Based on the pathological findings and monoclonal rearrangement of the T-cell receptor (TCR)-Cβ1 gene, mycosis fungoides (T2N0M0B0 stage IB) was diagnosed. Despite combination therapy including histone deacetylase inhibitor (vorinostat), the symptoms slowly evolved into Sézary syndrome (SS; T4N1M0B2) over 4 years, with dense infiltrates due to atypical lymphocytes expressing CCR4 developing in the entire dermis. Anti-CCR4 monoclonal antibody (mogamulizumab) treatment was started. After seven courses, the CCR4-positive atypical lymphocytes decreased in the dermis to levels below those seen at the outset of treatment. To our knowledge, there is no previous report of a case of SS managed with vorinostat followed by mogamulizumab demonstrating such a remarkable change in the pathological state following treatment.
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Affiliation(s)
- T Numata
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - T Nagatani
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - K Shirai
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - T Maeda
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - K Mae
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - M Nakasu
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - M Saito
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - T Usuda
- Department of Dermatology, Chukyo Hospital, Nagoya, Japan
| | - R Tsuboi
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - Y Okubo
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
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26
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Harada K, Maeda T, Matsubayashi J, Uchiyama M, Irisawa R, Go K, Tsuboi R. Centrifugal lipodystrophy of the scalp manifesting as centrifugal lipodystrophic alopecia. Clin Exp Dermatol 2017; 43:286-290. [PMID: 29266423 DOI: 10.1111/ced.13328] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/02/2017] [Indexed: 11/29/2022]
Abstract
Centrifugal lipodystrophy (CLD), characterized by a depressed lesion in the abdominal skin, is a chronic disease occurring more often among younger patients of East Asian descent. We present an extremely unusual case of CLD of the scalp associated with reversible hair loss. The patient demonstrated alopecia in the frontal, temporal and occipital areas of the scalp, which connected to form a ring-shaped area of hair loss. Curiously, the area of hair loss gradually expanded outwards while the central region showed normal hair regrowth. Immunohistochemical analysis demonstrated reduced expression of leptin, an adipokine capable of inducing the anagen phase of the hair cycle, in the adipose tissue, associated with active inflammation. By contrast, recovery of leptin expression was observed at sites of healed inflammatory lesions, suggesting that reversible hair loss might be caused by a change in leptin expression in adipose tissue.
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Affiliation(s)
- K Harada
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - T Maeda
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - J Matsubayashi
- Department of Anatomic Pathology, Tokyo Medical University, Tokyo, Japan
| | - M Uchiyama
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - R Irisawa
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - K Go
- Dermatology GO Clinic, Tokyo, Japan
| | - R Tsuboi
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
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27
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Imazato S, Kitagawa H, Tsuboi R, Kitagawa R, Thongthai P, Sasaki JI. Non-biodegradable polymer particles for drug delivery: A new technology for "bio-active" restorative materials. Dent Mater J 2017; 36:524-532. [PMID: 28835602 DOI: 10.4012/dmj.2017-156] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
To develop dental restorative materials with "bio-active" functions, addition of the capability to release active agents is an effective approach. However, such functionality needs to be attained without compromising the basic properties of the restorative materials. We have developed novel non-biodegradable polymer particles for drug delivery, aimed for application in dental resins. The particles are made using 2-hydroxyethyl methacrylate (HEMA) and a cross-linking monomer trimethylolpropane trimethacrylate (TMPT), with a hydrophilic nature to adsorb proteins or water-soluble antimicrobials. The polyHEMA/TMPT particles work as a reservoir to release fibroblast growth factor-2 (FGF-2) or cetylpyridinium chloride (CPC) in an effective manner. Application of the polyHEMA/TMPT particles loaded with FGF-2 to adhesives, or those loaded with CPC to resin-based endodontic sealers or denture bases/crowns is a promising approach to increase the success of the treatments by conferring "bio-active" properties to these materials to induce tissue regeneration or to inhibit bacterial infection.
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Affiliation(s)
- Satoshi Imazato
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
| | - Haruaki Kitagawa
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
| | - Ririko Tsuboi
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry.,Division for Interdisciplinary Dentistry, Osaka University Dental Hospital
| | - Ranna Kitagawa
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry
| | - Pasiree Thongthai
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
| | - Jun-Ichi Sasaki
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
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28
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Kitagawa H, Takeda K, Tsuboi R, Hayashi M, Sasaki JI, Imazato S. Influence of polymerization properties of 4-META/MMA-based resin on the activity of fibroblast growth factor-2. Dent Mater J 2017. [PMID: 28626207 DOI: 10.4012/dmj.2016-372] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Dental adhesive resins based on 4-methacryloxyethyl trimellitate anhydride (4-META)/methyl methacrylate (MMA) have been utilized for root-end filling and the bonding of fractured roots. To increase the success rate of these treatments, it would be beneficial to promote the healing of surrounding tissue by applying growth factors. In this study, the influences of the polymerization properties of 4-META/MMA-based resins on the activity of fibroblast growth factor-2 (FGF-2) were evaluated in vitro. The temperature increase caused by the heat generation during polymerization of the 4-META/MMA-based resin was insufficient to change the structure and function of FGF-2. Unpolymerized monomers released from the cured 4-META/MMA-based resin had no negative influences on the ability of FGF-2 to promote the proliferation of osteoblast-like cells. These findings suggest that it is possible to use FGF-2 in combination with 4-META/MMA-based resins.
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Affiliation(s)
- Haruaki Kitagawa
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
| | - Kahoru Takeda
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry
| | - Ririko Tsuboi
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry.,Division for Interdisciplinary Dentistry, Osaka University Dental Hospital
| | - Mikako Hayashi
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry
| | - Jun-Ichi Sasaki
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
| | - Satoshi Imazato
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
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29
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Harada K, Iwasaki A, Kato Y, Fujii N, Saito M, Tsuboi R. Cytomegalovirus oral ulcers in a patient with bullous pemphigoid. Clin Exp Dermatol 2016; 41:685-7. [PMID: 27335089 DOI: 10.1111/ced.12862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2015] [Indexed: 11/30/2022]
Affiliation(s)
- K Harada
- Department of Dermatology, Tokyo Medical University, Shinjuku-ku, Tokyo, Japan.
| | - A Iwasaki
- Department of Dermatology, Tokyo Medical University, Shinjuku-ku, Tokyo, Japan
| | - Y Kato
- Department of Dermatology, Tokyo Medical University, Shinjuku-ku, Tokyo, Japan
| | - N Fujii
- Department of Dermatology, Tokyo Medical University, Shinjuku-ku, Tokyo, Japan
| | - M Saito
- Department of Dermatology, Tokyo Medical University, Shinjuku-ku, Tokyo, Japan
| | - R Tsuboi
- Department of Dermatology, Tokyo Medical University, Shinjuku-ku, Tokyo, Japan
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30
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Kato Y, Egusa C, Maeda T, Tsuboi R. 086 Combination of retinoid and histone deacetylase inhibitor produced an anti-tumor effect in cutaneous T-cell lymphoma by restoring tumor suppressor gene, retinoic acid receptorβ2, via histone acetylation. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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31
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Yamamoto M, Masashi M, Yamanishi H, Sakaguchi M, Hiruma J, Tsuboi R, Hibino T. 494 NOD2 inflammasome is associated with inflammatory and immune reactions in atopic dermatitis. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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32
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Kariya T, Kato Y, Kanzaki A, Kanda Y, Ohara T, Tsuboi R. [(18) F]-Fluorodeoxy-d-glucose uptake-positive seborrhoeic keratosis on positron emission tomography may result from high expression of glucose transporter. Br J Dermatol 2016; 175:175-7. [PMID: 26801868 DOI: 10.1111/bjd.14421] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/29/2015] [Indexed: 12/25/2022]
Abstract
[(18) F]-Fluorodeoxy-d-glucose (FDG) positron emission tomography-computed tomography (PET-CT) is known to be highly accurate in differentiating benign lesions from malignant lesions. In rare cases, benign tumours, viral infections and sarcoidosis of the skin have been reported to show FDG uptake, but the mechanism remains unclear. Here we report the first documented case of seborrhoeic keratosis (SK) showing increased FDG uptake. FDG PET-CT can be used to detect enhanced glycolysis of tumour cells by measuring increased levels of glucose transporters (GLUTs) indicative of higher glucose uptake. GLUT1 and GLUT3 expression in this case was compared with that in PET-negative SK and two normal skin samples using quantitative polymerase chain reaction with paraffin-embedded tissue. The expression of GLUT1 and GLUT3 was higher in PET-positive SK than in PET-negative SK or normal skin. More specifically, the expression of GLUT3 was observed only in the PET-positive case. This study revealed that high GLUT1 and GLUT3 expression in SK might be associated with the uptake of FDG.
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Affiliation(s)
- T Kariya
- Department of Dermatology, Tokyo Metropolitan Tama Medical Center, 2-8-29 Musashidai, Fuchu-shi, Tokyo, 183-8524, Japan.,Department of Dermatology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjukuku, Tokyo, 160-0023, Japan
| | - Y Kato
- Department of Dermatology, Tokyo Metropolitan Tama Medical Center, 2-8-29 Musashidai, Fuchu-shi, Tokyo, 183-8524, Japan.,Department of Dermatology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjukuku, Tokyo, 160-0023, Japan
| | - A Kanzaki
- Department of Dermatology, Tokyo Metropolitan Tama Medical Center, 2-8-29 Musashidai, Fuchu-shi, Tokyo, 183-8524, Japan.,Department of Dermatology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjukuku, Tokyo, 160-0023, Japan
| | - Y Kanda
- Department of Dermatology, Tokyo Metropolitan Tama Medical Center, 2-8-29 Musashidai, Fuchu-shi, Tokyo, 183-8524, Japan.,Department of Dermatology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjukuku, Tokyo, 160-0023, Japan
| | - T Ohara
- Department of Respiratory Surgery, Tokyo Metropolitan Tama Medical Center, 2-8-29 Musashidai, Fuchu-shi, Tokyo, 183-8524, Japan
| | - R Tsuboi
- Department of Dermatology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjukuku, Tokyo, 160-0023, Japan
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33
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Kogure Y, Saka H, Oki M, Kitagawa C, Oka S, Nakahata M, Hori K, Tsuboi R, Murakami Y, Ise Y. 3053 Association between efficacy of pemetrexed and EGFR mutation status for EGFR mutated lung carcinoma. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31695-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Jo R, Ito T, Egusa C, Maeda T, Numata T, Mae K, Saito M, Harada K, Tsuboi R. A case of immediate type of food allergy due to parvalbumin from soft-shelled turtle (Trionychidae) occurring in the working environment. J Eur Acad Dermatol Venereol 2015; 30:1419-20. [DOI: 10.1111/jdv.13262] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- R. Jo
- Department of Dermatology; Tokyo Medical University; Tokyo Japan
| | - T. Ito
- Department of Dermatology; Tokyo Medical University; Tokyo Japan
| | - C. Egusa
- Department of Dermatology; Tokyo Medical University; Tokyo Japan
| | - T. Maeda
- Department of Dermatology; Tokyo Medical University; Tokyo Japan
| | - T. Numata
- Department of Dermatology; Tokyo Medical University; Tokyo Japan
| | - K. Mae
- Department of Dermatology; Tokyo Medical University; Tokyo Japan
| | - M. Saito
- Department of Dermatology; Tokyo Medical University; Tokyo Japan
| | - K. Harada
- Department of Dermatology; Tokyo Medical University; Tokyo Japan
| | - R. Tsuboi
- Department of Dermatology; Tokyo Medical University; Tokyo Japan
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Harii K, Arase S, Tsuboi R, Weng E, Daniels S, VanDenburgh A. Erratum to: Bimatoprost for Eyelash Growth in Japanese Subjects: Two Multicenter Controlled Studies. Aesthetic Plast Surg 2014. [PMCID: PMC4643599 DOI: 10.1007/s00266-014-0390-7] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- K. Harii
- />Department of Plastic Surgery, Kyorin University, School of Medicine, Tokyo, Japan
| | - S. Arase
- />Health Insurance Naruto Hospital, Tokushima, Japan
| | - R. Tsuboi
- />Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - E. Weng
- />Dermatology Clinical Research and Development, Allergan, Inc., Irvine, CA USA
| | - S. Daniels
- />Global Health Outcomes, Strategy and Research, Allergan, Inc., Irvine, CA USA
| | - A. VanDenburgh
- />Dermatology Clinical Research and Development, Allergan, Inc., 2525 Dupont Drive, Mail Stop T1-2N, Irvine, CA 92612 USA
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Watanabe S, Nakano M, Miyake K, Tsuboi R, Sasaki S. Effect of molecular orientation angle of imidazolium ring on frictional properties of imidazolium-based ionic liquid. Langmuir 2014; 30:8078-8084. [PMID: 24942825 DOI: 10.1021/la501099d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Ionic liquids have significant potential as lubricants, and it is known that ionic liquids exhibit characteristic behavior at solid-liquid interfaces. Although it is believed that the structure of ionic liquids at the interface contributes to the tribological properties in the region of boundary-mixed lubrication, this contribution has not been clarified because such analysis is difficult. In this research, we clarify the lubrication mechanism of an imidazolium-based ionic liquid by comparing the results of friction tests with interfacial molecular orientation analysis using sum frequency generation spectroscopy. Consequently, we clarify that the tilt angle of the imidazolium ring affects the friction coefficient of the ionic liquid; that is, the larger tilt angle, the lower the friction coefficient.
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Affiliation(s)
- S Watanabe
- Department of Mechanical Engineering, Tokyo University of Science , 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
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Harii K, Arase S, Tsuboi R, Weng E, Daniels S, VanDenburgh A. Bimatoprost for eyelash growth in Japanese subjects: two multicenter controlled studies. Aesthetic Plast Surg 2014; 38:451-60. [PMID: 24643895 PMCID: PMC4003339 DOI: 10.1007/s00266-014-0293-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Accepted: 02/07/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND Bimatoprost 0.03% has enhanced eyelash prominence in clinical trials enrolling mostly Caucasian subjects. The studies described in this report evaluated the efficacy and safety of bimatoprost in Japanese subjects with idiopathic and chemotherapy-induced eyelash hypotrichosis. METHODS In two multicenter, double-masked, randomized, parallel-group studies (study 1: n=173 [idiopathic]; study 2: n=36 [chemotherapy-induced]), subjects received bimatoprost 0.03% or vehicle applied once daily to the upper eyelid margins. The primary efficacy measure was eyelash prominence measured by Global Eyelash Assessment (GEA) scores. Additional measures were eyelash length, thickness, and darkness, assessed by digital image analysis, and patient satisfaction (Eyelash Satisfaction Questionnaire-9). Safety assessments included adverse-event monitoring and ophthalmic examinations. RESULTS Significantly more bimatoprost-treated subjects had at least a one-grade improvement in GEA score from baseline to month 4 compared with vehicle in study 1 (77.3 vs 17.6%; P<0.001) and study 2 (88.9 vs 27.8%; P<0.001). Bimatoprost-treated subjects had significantly greater increases in eyelash length, thickness, and darkness at the primary time point (month 4 in both studies; all P<0.001, study 1; P≤0.04, study 2). The bimatoprost group showed greater subject satisfaction in both studies. The incidence of adverse events was similar in the two groups. Ophthalmic examination showed slightly greater mean reductions in intraocular pressure (IOP) with bimatoprost than with vehicle, and the reductions were within the normal range for daily IOP fluctuations. CONCLUSION Bimatoprost 0.03% was shown to be effective and safe in these studies of Japanese subjects with eyelash hypotrichosis. LEVEL OF EVIDENCE I This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
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Affiliation(s)
- K. Harii
- Department of Plastic Surgery, Kyorin University School of Medicine, Tokyo, Japan
| | - S. Arase
- Health Insurance Naruto Hospital, Tokushima, Japan
| | - R. Tsuboi
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - E. Weng
- Dermatology Clinical Research and Development, Allergan, Inc., Irvine, CA USA
| | - S. Daniels
- Global Health Outcomes, Strategy and Research, Allergan, Inc., Irvine, CA USA
| | - A. VanDenburgh
- Dermatology Clinical Research and Development, Allergan, Inc., 2525 Dupont Drive, Mail Stop T1-2N, Irvine, CA 92612 USA
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Kitagawa C, Oki M, Murakami Y, Hori K, Funahashi Y, Oka S, Tsuboi R, Ryuge M, Kogure Y, Saka H. Bronchoscopic Intervention for Airway Stenosis Caused by Thyroid Tumor. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)34157-0] [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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Niwa Y, Potaczek DP, Kanada S, Takagi A, Shimokawa N, Ito T, Mitsuishi K, Okubo Y, Tajima M, Hobo A, Ng W, Tsuboi R, Ikeda S, Ogawa H, Okumura K, Nishiyama C. FcεRIα gene (FCER1A) promoter polymorphisms and total serum IgE levels in Japanese atopic dermatitis patients. Int J Immunogenet 2010; 37:139-41. [DOI: 10.1111/j.1744-313x.2010.00901.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Miyakura T, Yamamoto T, Okubo Y, Ishii N, Oyama B, Hashimoto T, Tsuboi R. Pemphigus foliaceus with prominent neutrophilic pustules initially presenting as erythroderma. Clin Exp Dermatol 2009; 34:e46-9. [DOI: 10.1111/j.1365-2230.2008.03190.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Ebihara M, Makimura K, Sato K, Abe S, Tsuboi R. Molecular detection of dermatophytes and nondermatophytes in onychomycosis by nested polymerase chain reaction based on 28S ribosomal RNA gene sequences. Br J Dermatol 2009; 161:1038-44. [PMID: 19566663 DOI: 10.1111/j.1365-2133.2009.09249.x] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Onychomycosis is often caused by dermatophytes, but the role of nondermatophytes is underestimated due to the difficulty of identifying them by conventional direct microscopy and culture. OBJECTIVES This study aims to detect nondermatophytes, as well as dermatophytes, in the nail samples of patients with onychomycosis using a polymerase chain reaction (PCR)-based culture-independent method. MATERIALS AND METHODS The nested PCR assay targeting the sequence of the 28S ribosomal RNA gene was used to amplify fungal DNAs from 50 microscopy-positive nail specimens. Newly designed primer sets for dermatophyte universal, Trichophyton rubrum, T. mentagrophytes, Aspergillus spp., Scopulariopsis brevicaulis, Fusarium solani, F. oxysporum, F. verticillioides, Candida albicans and C. tropicalis were used after confirmation of their specificity. RESULTS Forty-seven cases (94%) were positive for fungal DNA, among which dermatophytes were detected in 39 cases (83.0%): T. rubrum in 35 cases (74.5%) and T. mentagrophytes in eight cases (17.0%). Surprisingly, nondermatophytes were detected in 18 cases (38.3%), both dermatophytes and nondermatophytes in 10 cases (21.3%) and nondermatophytes alone in eight cases (17.0%). Aspergillus spp. alone was observed in five cases (10.6%). CONCLUSIONS This study indicates that most of the affected nail plates of patients with onychomycosis were positive for specific fungal DNAs, and suggests that nondermatophytes detected at high rates may be involved in the pathogenesis of onychomycosis.
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Affiliation(s)
- M Ebihara
- Department of Dermatology, Tokyo Medical University, Nishishinjuku, 6-1-1 Shinjuku-ku, Tokyo 160-0023, Japan
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Oiso N, Kishida K, Fukai K, Motokawa T, Hosomi N, Suzuki T, Mitsuhashi Y, Tsuboi R, Kawada A. A Japanese piebald patient with auburn hair colour associated with a novel mutation p.P832L in the KIT gene and a homozygous variant p.I120T in the MC1R gene. Br J Dermatol 2009; 161:468-9. [PMID: 19416250 DOI: 10.1111/j.1365-2133.2009.09138.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- N Oiso
- Department of Dermatology, Kinki University School of Medicine, 377-2 Ohno-Higashi, Osaka-Sayama, Osaka, Japan.
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Hayashi K, Yamamoto T, Oyama K, Nagai T, Tsuboi R. Epidermotropic skin metastasis from gastric cancer: immunohistochemical analysis using cytokeratins. Clin Exp Dermatol 2008; 34:406-8. [PMID: 19120396 DOI: 10.1111/j.1365-2230.2008.02898.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Kato Y, Yoshino I, Maeda T, Tsuboi R. 66 POSTER Synergistic anti tumor effect of histone deacetylase inhibitor MS-275 in combination with interleukin 2 in a murine model of malignant melanoma. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)71998-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Tsuboi R. A pharmacological model for studying mechanical properties of skin. Int J Cosmet Sci 2008. [DOI: 10.1111/j.1467-2494.2004.00254_5.x] [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: 10/19/2022]
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Wakamatsu J, Yamamoto T, Uchida H, Tsuboi R. Lichen sclerosus et atrophicus of the lip: successful treatment with topical tacrolimus. J Eur Acad Dermatol Venereol 2008; 22:760-2. [DOI: 10.1111/j.1468-3083.2007.02469.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Tsuboi R, Yamazaki M, Matsuda Y, Uchida K, Ueki R, Ogawa H. Antisense oligonucleotide targeting fibroblast growth factor receptor (FGFR)-1 stimulates cellular activity of hair follicles in an in vitro organ culture system. Int J Dermatol 2007; 46:259-63. [PMID: 17343580 DOI: 10.1111/j.1365-4632.2007.03018.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND The hair cycle is regulated by various molecules, among which FGF-5 has been shown to promote the transition from anagen to catagen. The FGFR-1, a trans-membrane receptor of FGF-5 with tyrosine kinase activity, is localized in the follicular papilla of hair follicles. OBJECTIVES In order to apply the antisense oligonucleotides targeting FGFR-1 as a treatment for baldness, we examined the effect of the oligonucleotides on hair follicle growth in a serum-free organ culture system. METHODS Vibrissal hair follicles from C3H/He mice were cultured in the presence of a reagent at 31 degrees C in 95% O(2)-5% CO(2) for 72 h. A 20-mer antisense nucleotide and its randomly arranged counterpart were prepared by predicting the effective target site of FGFR-1 mRNA. Cellular activity in the hair bulb was estimated by measuring the fluorescence intensity (FI) of the medium after incubation with AlamarBlue dye. RESULTS The addition of 30 microM of the phosphorothioate form of antisense oligonucleotide (A1561TS) to the media increased the FI by 30%, whereas the control produced no detectable change. This effect was reproducible dose-dependent with maximal stimulation at 30 microM. Incorporation of the oligonucleotide into the follicular papilla was histologically confirmed by incubation with FITC-labeled phosphorothioate oligonucleotides, and the intact morphological structure of the hair bulb was maintained intact after a 72-h incubation. CONCLUSIONS These results suggest the clinical utility of antisense nucleotide targeting FGFR-1 as a treatment for baldness.
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Affiliation(s)
- R Tsuboi
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan.
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