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Koura Y, Tomiyama K, Kunimatsu Y, Hamada N, Mukai Y. Microbial shift of oral biofilm associated with remineralization of root dentin lesions. Am J Dent 2024; 37:47-52. [PMID: 38458983] [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: 03/10/2024]
Abstract
PURPOSE To examine the relationship between remineralization of incipient root dentin lesions and the presence of polymicrobial biofilms, as well as examine changes in microbial composition. METHODS Bovine root dentin disks used as specimens for biofilm formation, were cultured using saliva from a single donor. Amsterdam Active Attachment biofilm model was used to grow biofilms. The culture medium was McBain 2005 with 0.2% sucrose and 0.4 ppm F as sodium fluoride. After cultivation for 48 hours to achieve demineralization, a control group (n=10) was obtained and the other specimens were further cultured for 336 hours in two types of remineralization culture medium, with sucrose (S+) and without sucrose (S-), through continuous anaerobic incubation (10% CO2,10% H2, 80% N2). Then half of the specimens cultured in the S- medium were transferred to the S+ medium for an additional 48 hours resulting in three experimental groups S(+) (n=10), S(-) (n=10), and S(-)de (n=10), respectively. Experiment 1: Transverse microradiography (TMR) analysis - Immediately after respective culture treatments, integrated mineral loss (IML) and lesion depth (LD) in the dentin specimens were analyzed by TMR. Experiment 2: Microbiome analysis - Sequence data of the 16S rRNA gene of each sample was obtained using MiSeq, and partial base sequences were determined. Next-generation sequencing was performed to determine the taxonomic groups of fungi present in the biofilm samples. RESULTS Experiment 1: In the control group, formation of dentin demineralization lesions by polymicrobial species biofilms was confirmed. The S(-) group showed significantly decreased IML and shallower LD compared to the control group. The S(-)de group showed a significant increase in IML and LD compared to the S(-) group. Experiment 2: There were statistically significant differences in microbiome between the control group and each of the three experimental groups, both at the genus and species levels. A significant difference in genus was observed between the S(-) group and the S(-)de group. CLINICAL SIGNIFICANCE The confirmation of the possibility of microbial shift occurring during the remineralization process of root caries will lead to the development of new remineralization therapies.
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Affiliation(s)
- Yuna Koura
- Department of Restorative Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Kiyoshi Tomiyama
- Department of Restorative Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Yuichi Kunimatsu
- Department of Restorative Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Nobushiro Hamada
- Department of Oral Microbiology, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Yoshiharu Mukai
- Department of Restorative Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan,
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Tomiyama K, Ishizawa M, Watanabe K, Kawata A, Hamada N, Mukai Y. Antibacterial effects of surface pre-reacted glass-ionomer (S-PRG) filler eluate on polymicrobial biofilms. Am J Dent 2023; 36:91-94. [PMID: 37076299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
Abstract
PURPOSE To analyze the effects of surface pre-reacted glass-ionomer (S-PRG) filler eluate on polymicrobial biofilm metabolism and live bacterial count. METHODS Biofilm was formed using glass disks 12 mm in diameter and 150 µm in thickness. Stimulated saliva was diluted 50-fold with buffered McBain 2005 and cultured in anaerobic conditions at 37°C for 24 hours in anaerobic conditions (10% CO₂, 10% H₂, 80% N₂) to form the biofilm on the glass disks. Following this, biofilms were treated with (1) sterilized deionized water (control), (2) 0.2% chlorhexidine digluconate (0.2CX), (3) S-PRG eluate diluted to 10% (10% S-PRG),(4) 20% S-PRG,(5) 40% S-PRG,(6) 80% S-PRG,and (7) S-PRG for 15 minutes (n= 10 per group), and samples were subdivided into two groups for measuring live bacterial count immediately after treatment and after 48 hours of culturing after treatment. The pH of the spent medium collected at the time of culture medium exchange was tested. RESULTS Immediately after treatment, the live bacterial count of samples treated with drug solutions was significantly lower than the control (8.2 × 10⁸), and the counts of samples treated with 0.2CX (1.3 × 10⁷) and S-PRG (1.4 × 10⁷) were significantly lower than those treated with diluted S-PRG (4.4 × 10⁷-1.4 x 10⁸). When the medium was measured again after culturing for 48 hours, growth was continually inhibited in all treatment groups and the bacterial count of samples treated with S-PRG (9.2 x 10⁷) was significantly lower than that of samples treated with 0.2CX (1.8 × 10⁸). The pH of spent medium immediately after treatment was significantly higher in groups treated with drug solutions (5.5-6.8) than the controls (4.2), and it was highest in the S-PRG-treated group (6.8). Thereafter, when culturing was continued for 48 hours, the pH of all treated groups decreased; however, the pH of the S-PRG-treated group was significantly higher than groups treated with other drug solutions. CLINICAL SIGNIFICANCE Surface pre-reacted glass-ionomer (S-PRG) filler eluate not only reduced the live bacterial count of polymicrobial biofilm, but also continuously inhibited the lowering of pH.
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Affiliation(s)
- Kiyoshi Tomiyama
- Department of Restorative Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Masato Ishizawa
- Department of Restorative Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Kiyoko Watanabe
- Department of Oral Microbiology, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Akira Kawata
- Department of Molecular Oral Histology, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Nobushiro Hamada
- Department of Oral Microbiology, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Yoshiharu Mukai
- Department of Restorative Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan,
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Ogihara T, Tomiyama K, Iizuka J, Ishizawa M, Shiiya T, Mukai Y. Effects of desensitizer containing fluoroaluminocalciumsilicate glass nanoparticles on remineralization of root dentin subsurface lesions in vitro. Dent Mater J 2021; 40:1027-1032. [PMID: 33827998 DOI: 10.4012/dmj.2020-288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We investigated the remineralization effects of Nanoseal (NS) dentin desensitizer on demineralized root dentin. Baseline lesion specimens prepared from bovine root dentin were immersed in artificial saliva (AS) or deionized water (DW) after treatment with NS or fluoride-free Nanoseal (NS(-)). Treatment and control groups comprised: 1, AS; 2, NS/AS; 3, NS(-)/AS; 4,NS/DW; 5, NS(-)/DW; and 6, baseline demineralization. Integrated mineral loss (IML) and lesion depth (LD) were determined by transverse microradiography. Fluoride concentrations in the immersion solutions were measured. AS, NS/AS and NS(-)/AS showed higher mineral volume % at the surface and lesion body than did other groups. NS/AS showed significantly lower IML than did AS. There was no significant difference in IML between NS/AS and NS(-)/AS. The highest concentration of fluoride was in the NS/AS immersion solution. The findings suggest Nanoseal facilitated remineralization of demineralized root dentin, and fluoride and other ions included may have contributed to this effect.
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Affiliation(s)
- Takashi Ogihara
- Division of Restorative Dentistry, Department of Oral Interdisciplinary Medicine, Graduate School of Dentistry, Kanagawa Dental University
| | - Kiyoshi Tomiyama
- Division of Restorative Dentistry, Department of Oral Interdisciplinary Medicine, Graduate School of Dentistry, Kanagawa Dental University
| | - Junko Iizuka
- Division of Restorative Dentistry, Department of Oral Interdisciplinary Medicine, Graduate School of Dentistry, Kanagawa Dental University
| | - Masato Ishizawa
- Division of Restorative Dentistry, Department of Oral Interdisciplinary Medicine, Graduate School of Dentistry, Kanagawa Dental University
| | - Toru Shiiya
- Division of Restorative Dentistry, Department of Oral Interdisciplinary Medicine, Graduate School of Dentistry, Kanagawa Dental University
| | - Yoshiharu Mukai
- Division of Restorative Dentistry, Department of Oral Interdisciplinary Medicine, Graduate School of Dentistry, Kanagawa Dental University
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Shiiya T, Kataoka A, Tomiyama K, Fujino F, Mukai Y. Anti-demineralization characteristics of surface pre-reacted glass-ionomer (S-PRG) filler-containing varnishes. Dent Mater J 2020; 40:416-421. [PMID: 33177310 DOI: 10.4012/dmj.2019-396] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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
This study investigated the anti-demineralization effects of surface pre-reacted glass-ionomer (S-PRG) filler-containing varnishes. Thirty-five bovine root specimens were divided into five treatment groups, with seven specimens each coated with 1) MI varnish (MIV), 2) F varnish (FV), 3) PRG varnish I (PV), 4) PRG varnish II (with sodium fluoride added, PVF), and 5) acid-resistant nail varnish (Control). A 3×1 mm area of the dentin surface adjacent to each varnish was demineralized for one week at 37°C. Integrated mineral loss (IML) of these lesions was determined by transverse microradiography, as was the amount of fluoride released by each material. IML was significantly lower in the PV and PVF groups than in the Control group, and was significantly lower in the PVF than in the MIV and FV groups. These findings indicated that S-PRG filler-containing varnishes, especially varnish containing sodium fluoride, had superior anti-demineralization effects on root dentin.
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Affiliation(s)
- Toru Shiiya
- Division of Restorative Dentistry, Department of Oral Interdisciplinary Medicine, Graduate School of Dentistry, Kanagawa Dental University
| | - Aiko Kataoka
- Department of Dental Hygiene, Junior College, Kanagawa Dental University
| | - Kiyoshi Tomiyama
- Division of Restorative Dentistry, Department of Oral Interdisciplinary Medicine, Graduate School of Dentistry, Kanagawa Dental University
| | - Fukue Fujino
- Department of Dental Hygiene, Junior College, Kanagawa Dental University
| | - Yoshiharu Mukai
- Division of Restorative Dentistry, Department of Oral Interdisciplinary Medicine, Graduate School of Dentistry, Kanagawa Dental University
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Ishizawa M, Tomiyama K, Hasegawa H, Hamada N, Mukai Y. Comprehensive analysis of bacterial flora of a biofilm model in initial caries-inducing environment. Am J Dent 2020; 33:55-58. [PMID: 32259407] [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: 06/11/2023]
Abstract
PURPOSE To analyze changes in pH and bacterial flora with duration of culture and timing of sugar supply using a polymicrobial biofilm model. METHODS The biofilm was prepared using the method of Exterkate et al. Stimulated saliva from an adult was collected on a glass slide and added to unbuffered McBain medium containing 0.2% sucrose and cultivated under anaerobic conditions for 10 hours. Cultivation continued anaerobically in saliva-free medium refreshed twice daily, with or without sucrose, in five groups: in the Control and Groups A and C, with 0.2% sucrose for 96, 192 and 288 hours, respectively; in Groups B and E, with 0.2% sucrose for 96 hours then, respectively, without for 96 and 192 hours; in Group D, with 0.2% sucrose for 96 hours, without for 96 hours, then with for 96 hours. The pH of all spent medium was measured. Total bacteria counts were determined by Q-PCR. The bacterial composition was determined by next-generation sequencing of 16S rDNA. RESULTS The pH of spent medium depended on the presence or absence of sucrose. Total bacteria counts were higher in A, C and D than the other groups, and markedly lower in Group E. Principal components analysis and cluster analysis showed wider variation of bacterial flora of the biofilm in Groups B, D and E than other groups. CLINICAL SIGNIFICANCE Inspection of bacterial flora of a biofilm model of the initial caries-inducing environment may lead to the development of materials and procedures for the prevention of dental caries.
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Affiliation(s)
- Masato Ishizawa
- Department of Oral Interdisciplinary Medicine, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Kiyoshi Tomiyama
- Department of Oral Interdisciplinary Medicine, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan,
| | - Haruhiko Hasegawa
- Department of Oral Interdisciplinary Medicine, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Nobushiro Hamada
- Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Yoshiharu Mukai
- Department of Oral Interdisciplinary Medicine, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
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Elisofon SA, Magee JC, Ng VL, Horslen SP, Fioravanti V, Economides J, Erinjeri J, Anand R, Mazariegos GV, Martin A, Mannino D, Flynn L, Mohammad S, Alonso E, Superina R, Brandt K, Riordan M, Lokar J, Ito J, Elisofon S, Zapata L, Jain A, Foristal E, Gupta N, Whitlow C, Naik K, Espinosa H, Miethke A, Hawkins A, Hardy J, Engels E, Schreibeis A, Ovchinsky N, Kogan‐Liberman D, Cunningham R, Malik P, Sundaram S, Feldman A, Garcia B, Yanni G, Kohli R, Emamaullee J, Secules C, Magee J, Lopez J, Bilhartz J, Hollenbeck J, Shaw B, Bartow C, Forest S, Rand E, Byrne A, Linguiti I, Wann L, Seidman C, Mazariegos G, Soltys K, Squires J, Kepler A, Vitola B, Telega G, Lerret S, Desai D, Moghe J, Cutright L, Daniel J, Andrews W, Fioravanti V, Slowik V, Cisneros R, Faseler M, Hufferd M, Kelly B, Sudan D, Mavis A, Moats L, Swan‐Nesbit S, Yazigi N, Buranych A, Hobby A, Rao G, Maccaby B, Gopalareddy V, Boulware M, Ibrahim S, El Youssef M, Furuya K, Schatz A, Weckwerth J, Lovejoy C, Kasi N, Nadig S, Law M, Arnon R, Chu J, Bucuvalas J, Czurda M, Secheli B, Almy C, Haydel B, Lobritto S, Emand J, Biney‐Amissah E, Gamino D, Gomez A, Himes R, Seal J, Stewart S, Bergeron J, Truxillo A, Lebel S, Davidson H, Book L, Ramstack D, Riley A, Jennings C, Horslen S, Hsu E, Wallace K, Turmelle Y, Nadler M, Postma S, Miloh T, Economides J, Timmons K, Ng V, Subramonian A, Dharmaraj B, McDiarmid S, Feist S, Rhee S, Perito E, Gallagher L, Smith K, Ebel N, Zerofsky M, Nogueira J, Greer R, Gilmour S, Robert C, Cars C, Azzam R, Boone P, Garbarino N, Lalonde M, Kerkar N, Dokus K, Helbig K, Grizzanti M, Tomiyama K, Cocking J, Alexopoulos S, Bhave C, Schillo R, Bailey A, Dulek D, Ramsey L, Ekong U, Valentino P, Hettiarachchi D, Tomlin R. Society of pediatric liver transplantation: Current registry status 2011-2018. Pediatr Transplant 2020; 24:e13605. [PMID: 31680409 DOI: 10.1111/petr.13605] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [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: 05/31/2019] [Revised: 08/08/2019] [Accepted: 09/27/2019] [Indexed: 11/29/2022]
Abstract
BACKGROUND SPLIT was founded in 1995 in order to collect comprehensive prospective data on pediatric liver transplantation, including waiting list data, transplant, and early and late outcomes. Since 2011, data collection of the current registry has been refined to focus on prospective data and outcomes only after transplant to serve as a foundation for the future development of targeted clinical studies. OBJECTIVE To report the outcomes of the SPLIT registry from 2011 to 2018. METHODS This is a multicenter, cross-sectional analysis characterizing patients transplanted and enrolled in the SPLIT registry between 2011 and 2018. All patients, <18 years of age, received a first liver-only, a combined liver-kidney, or a combined liver-pancreas transplant during this study period. RESULTS A total of 1911 recipients from 39 participating centers in North America were registered. Indications included biliary atresia (38.5%), metabolic disease (19.1%), tumors (11.7%), and fulminant liver failure (11.5%). Greater than 50% of recipients were transplanted as either Status 1A/1B or with a MELD/PELD exception score. Incompatible transplants were performed in 4.1%. Kaplan-Meier estimates of 1-year patient and graft survival were 97.3% and 96.6%. First 30 days of surgical complications included reoperation (31.7%), hepatic artery thrombosis (6.3%), and portal vein thrombosis (3.2%). In the first 90 days, biliary tract complications were reported in 13.6%. Acute cellular rejection during first year was 34.7%. At 1 and 2 years of follow-up, 39.2% and 50.6% had normal liver tests on monotherapy (tacrolimus or sirolimus). Further surgical, survival, allograft function, and complications are detailed.
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Affiliation(s)
- Scott A Elisofon
- Division of Gastroenterology, Hepatology and Nutrition, Boston Children's Hospital, Boston, Massachusetts
| | - John C Magee
- Division of Surgery, University of Michigan Transplant Center, Ann Arbor, Michigan
| | - Vicky L Ng
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Transplant and Regenerative Medicine Center, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Simon P Horslen
- Department of Pediatrics, Seattle Children's Hospital, University of Washington School of Medicine, Seattle, Washington
| | - Vicki Fioravanti
- Section of Hepatology and Liver Transplantation, Children's Mercy Hospital, Kansas City, Missouri
| | | | | | | | - George V Mazariegos
- Division of Pediatric Transplant Surgery, Hillman Center for Pediatric Transplantation, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA, USA
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Tomiyama K, Shiiya T, Watanabe K, Hamada N, Mukai Y. Effect of toothpaste containing multiple ions-releasing filler on polymicrobial biofilm regrowth and dentin demineralization. Am J Dent 2019; 32:245-250. [PMID: 31675193] [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: 06/10/2023]
Abstract
PURPOSE To compare the efficacy of toothpaste containing surface pre-reacted glass-ionomer (S-PRG) filler particles to that of conventional sodium fluoride (NaF) toothpaste for the prevention of dentin demineralization and biofilm regrowth. METHODS Bovine root dentin specimens and glass coverslips were used as biofilm growth substrates. To establish biofilms, glass and dentin specimens were incubated for 72 hours in 0.2% sucrose McBain medium inoculated with stimulated saliva from a single donor. Specimens then received a single 5-minute treatment with S-PRG toothpaste, fluoride toothpaste, or sterilized deionized water and were incubated in McBain medium for 120 hours to allow biofilm regrowth. Output parameters during regrowth (72-192 hours) were pH of spent medium, colony-forming unit (CFU) counts of biofilms, and dentin mineral profiles, integrated mineral loss (IML: vol% × µm), and lesion depth (Ld). Treatment group differences were tested by one-way ANOVA followed by Tukey's multiple range test (P< 0.05). RESULTS At 144 hours, medium pH was significantly higher in the S-PRG-treated dentin group than in the NaF-treated dentin group. In addition, at 192 hours, the CFU count, IML, and Ld were lower in the S-PRG-treated dentin group than in the NaF-treated dentin group. There were significant differences of pH among dentin groups at 72 hours. Treatment with S-PRG toothpaste markedly inhibited dentin demineralization compared to that with NaF toothpaste. CLINICAL SIGNIFICANCE Toothpaste containing multiple ions-releasing filler suppressed bacterial viability and inhibited dentin demineralization.
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Affiliation(s)
- Kiyoshi Tomiyama
- Department of Oral Interdisciplinary Medicine, Kanagawa Dental University, Yokosuka, Kanagawa, Japan,
| | - Toru Shiiya
- Department of Oral Interdisciplinary Medicine, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Kiyoko Watanabe
- Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Nobushiro Hamada
- Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Yoshiharu Mukai
- Department of Oral Interdisciplinary Medicine, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
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Akabayashi A, Nakazawa E, Ozeki-Hayashi R, Tomiyama K, Mori K, Demme RA, Akabayashi A. Twenty Years After Enactment of the Organ Transplant Law in Japan: Why Are There Still So Few Deceased Donors? Transplant Proc 2018; 50:1209-1219. [PMID: 29880339 DOI: 10.1016/j.transproceed.2018.02.078] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 01/12/2018] [Accepted: 02/06/2018] [Indexed: 11/19/2022]
Abstract
BACKGROUND Twenty years have passed since the 1997 enactment of the Organ Transplant Law in Japan, but the number of deceased donors remains extremely low. In this study we examine why deceased donation has continued to remain so infrequent. METHODS This investigation was a secondary analysis of published data from the Japan Organ Transplant Network, 2016 Fact Book of Organ Transplantation in Japan, and International Registry on Organ Donation and Transplantation. RESULTS In the past 20 years, donation intent declarations, knowledge, and respect for family member's wishes have increased, whereas resistance toward transplantation has decreased. Despite this, the traditional perspective on corpses of gotai manzoku (ie, the soul cannot be put to rest without being physically intact and without defect), the family-centricism, and reward-seeking altruism have not changed much. Living organ transplants have alleviated the organ deficiency somewhat, and the law requiring family consent seems to have contributed to the observed small increase in deceased donors. CONCLUSION The number of deceased donors is unlikely to increase suddenly. However, 8 strategies are proposed to increase the number of deceased donors, including: increasing the number of donor procurement coordinators and establishing a training system; increasing the number of organ procurement facilities; creating hub transplant centers and training transplant surgeons; implementing radical reform in public education; reducing workload and improving education of emergency physicians, neurosurgeons, and pediatricians; revisiting the stringent standards of brain-death determination; revisiting the registration process; and considering development of a Japanese version of organ procurement organizations as well as revisions to the Organ Transplant Law. The Japanese government and academic societies must work together to increase the number of deceased donors in Japan.
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Affiliation(s)
- A Akabayashi
- Department of Biomedical Ethics, Faculty of Medicine, University of Tokyo, Tokyo, Japan
| | - E Nakazawa
- Department of Biomedical Ethics, Faculty of Medicine, University of Tokyo, Tokyo, Japan
| | - R Ozeki-Hayashi
- Department of Biomedical Ethics, Faculty of Medicine, University of Tokyo, Tokyo, Japan
| | - K Tomiyama
- Division of Abdominal Transplant Surgery, Department of Surgery, University of Rochester Medical Center, Rochester, New York
| | - K Mori
- Department of Biomedical Ethics, Faculty of Medicine, University of Tokyo, Tokyo, Japan
| | - R A Demme
- Division of Medical Humanities and Bioethics, University of Rochester Medical Center, Rochester, New York
| | - A Akabayashi
- Department of Biomedical Ethics, Faculty of Medicine, University of Tokyo, Tokyo, Japan.
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Shinkuma S, Yokoyama R, Hayashi R, Nguyen H, Kawai T, Tomiyama K, Abe R. 810 A novel KITLG mutation detected only in the lesion of linear and whorled nevoid hypermelanosis. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Teranaka A, Tomiyama K, Ohashi K, Miyake K, Shimizu T, Hamada N, Mukai Y, Hirayama S, Nihei T. Relevance of surface characteristics in the adhesiveness of polymicrobial biofilms to crown restoration materials. J Oral Sci 2018; 60:129-136. [DOI: 10.2334/josnusd.16-0758] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Ayako Teranaka
- Department of Operative Dentistry, Nihon University School of Dentistry at Matsudo
| | - Kiyoshi Tomiyama
- Division of Cariology and Restorative Dentistry, Department of Oral Function and Restoration, Graduate School of Dentistry, Kanagawa Dental University
| | - Katsura Ohashi
- Division of Clinical Biomaterials, Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University
| | - Kaori Miyake
- Division of Clinical Biomaterials, Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University
| | - Tota Shimizu
- Division of Prosthodontic Dentistry for Function of TMJ and Occlusion, Department of Oral Function and Restoration, Kanagawa Dental University
| | - Nobushiro Hamada
- Division of Microbiology, Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University
| | - Yoshiharu Mukai
- Division of Cariology and Restorative Dentistry, Department of Oral Function and Restoration, Graduate School of Dentistry, Kanagawa Dental University
| | - Satoshi Hirayama
- Department of Operative Dentistry, Nihon University School of Dentistry at Matsudo
| | - Tomotaro Nihei
- Division of Clinical Biomaterials, Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University
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Shiiya T, Tomiyama K, Iizuka J, Hasegawa H, Kuramochi E, Fujino F, Ohashi K, Nihei T, Teranaka T, Mukai Y. Effects of resin-based temporary filling materials against dentin demineralization. Dent Mater J 2017; 35:70-5. [PMID: 26830825 DOI: 10.4012/dmj.2015-135] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study investigated the in vitro anti-demineralization effects of resin-based temporary filling materials containing surface prereacted glass-ionomer (S-PRG) filler on dentin. Bovine root dentin specimens with a 3×3 mm experimental surface were divided into four treatment groups: DuraSeal (DU) as a control, S-PRG filler-free temporary material (S0), material containing 10% (S10) and 20% (S20) S-PRG filler. Each material was applied to 3×2 mm of the experimental surface, and the specimens were immersed in 8% methylcellulose gel demineralization system for one week at 37˚C. Mineral profiles and integrated mineral loss (IML) of lesions induced on the surface (3×1 mm) adjacent to the materials were computed by transversal microradiography. S10 and S20 yielded thick surface layers and shallow lesion bodies, with significantly lower IML than DU and S0 (p<0.05, Tukey's test). These findings indicate that temporary filling resin-based materials containing over 10% of S-PRG filler content have anti-demineralization effects on adjacent dentin.
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Affiliation(s)
- Toru Shiiya
- Department of Cariology and Restorative Dentistry, Graduate School of Dentistry, Kanagawa Dental University
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Tomiyama K, Mukai Y, Kumada H, Watanabe K, Hamada N, Teranaka T. Formation of subsurface dentin lesions using a polymicrobial biofilm model. Am J Dent 2015; 28:13-17. [PMID: 25864236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
PURPOSE To simulate an oral demineralization environment by multiple species of bacteria by inducing subsurface dentin lesions with a polymicrobial biofilm model. METHODS Polymicrobial biofilms consisting of multiple species of bacteria were generated from stimulated saliva using a high-throughput active attachment model. Biofilms were grown on dentin specimens in McBain medium containing 0, 0.2 or 2.5 ppm F and on glass without fluoride for 192 hours. The medium was refreshed twice daily, after 10 and 14 hours, until 72 hours, followed by treatment for 5 minutes with 400 ppm fluoride. Specimens were recovered after 192 hours. The number of colony forming units (CFU) was measured, and integrated mineral loss (IML) was determined by transversal microradiography. RESULTS Mineral profiles in specimens grown with 0.2F and 2.5F revealed surface layers and initial lesions distinct from those grown with 0F. IML was significantly lower with 0.2F and 2.5F than with 0F (P < 0.05), although CFUs were similar. CFUs of biofilms grown on dentin in medium containing 0F were 10-fold higher than on glass (P < 0.05). Subsurface lesions on dentin formed consistently, with their growth progression inhibited by application of fluoride. To our knowledge, this is the first report describing the induction of subsurface dentin lesions by a polymicrobial biofilm model, and this model may be useful for studies of demineralization supporting in situ and in vivo models.
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Hasegawa H, Tomiyama K, Kumada H, Kawata A, Higashi K, Takahashi O, Hamada N, Mukai Y. Antimicrobial effects of carbamide peroxide against a polymicrobial biofilm model. Am J Dent 2015; 28:57-60. [PMID: 25864244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
PURPOSE To investigate the in vitro antimicrobial effects of carbamide peroxide (CP) and CP-based home bleaching agents against polymicrobial (PM) biofilms. METHODS Using a high-throughput active attachment model, PM biofilms were cultured on glass coverslips by diluting the stimulated saliva of one healthy adult. All experiments were performed anaerobically in McBain medium, which was refreshed twice daily. After biofilm formation for 24 or 72 hours, the biofilms were treated with 0.5%, 2.5%, 5%, or 10% CP, 20-fold dilutions of HiLite Shade Up (HS) or Opalescence Regular (OR), 0.2% chlorhexidine digluconate (CHX), 0.2% NaF, or deionized water (n = 10 each). Biofilms were dispersed and the number of colony forming units (CFU) was measured on tryptic soy agar blood plates. Coverslips containing 72-hour biofilms treated with 0.5% and 10% CP and deionized water were stained and scanned by confocal laser scanning microscopy (CLSM). RESULTS Treatment of 24- and 72-hour biofilms with HS, OR and CH yielded significantly fewer colonies than treatment with water or 0.2% NaF. No growing colonies were observed after treatment with 10% CP. CLSM showed that the percentage of dead bacteria increased as the concentration of CP increased.
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Ohashi K, Miyake K, Yamaguchi H, Teranaka A, Shiiya T, Tomiyama K, Mukai Y, Nihei T. Effect of surface treatment with commercial silane coupling agents. Dent Mater 2015. [DOI: 10.1016/j.dental.2015.08.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Shiiya T, Kataoka A, Fujino F, Tomiyama K, Iizuka J, Hasegawa H, Kuramochi E, Ohashi K, Nihei T, Mukai Y. Anti-demineralization effect of novel S-PRG filler containing varnishes on dentin. Dent Mater 2015. [DOI: 10.1016/j.dental.2015.08.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Shiiya T, Tomiyama K, Iizuka J, Hasegawa H, Kuramochi E, Fujino F, Ohashi K, Nihei T, Teranaka T, Mukai Y. Effect of the coating material on root dentin remineralization in vitro. Am J Dent 2014; 27:258-262. [PMID: 25842458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
PURPOSE A fluoride-releasing coating material containing surface pre-reacted glass-ionomer (S-PRG) filler has become commercially available. However, there has been no detailed investigation of its remineralization effects at various tooth surface regions. The remineralization effects of S-PRG filler-containing coating material at different sites of demineralized dentin surfaces in vitro were evaluated. METHODS Baseline lesions were prepared on bovine root dentin surfaces by immersion in demineralization buffer and divided into four groups: (B)--baseline lesion; (P)--S-PRG filler-containing material; (V)--S-PRG filler-free coating material as negative control; and (X)--resin-modified glass- ionomer as positive control. Material was applied to half the lesion surface, then P, V and X were remineralized in a gel system. Mineral profiles, integrated mineral loss (IML) and lesion depth (LD) at four regions, i.e. 1--exposed dentin surface adjacent to the material; 2--at a distance from the material; 3--beneath the material near to the edge; and 4--at a distance from the edge, were analyzed by transversal microradiography. Data were analyzed using ANOVA and Games-Howell test with α = 0.05. RESULTS B showed typical artificial demineralized lesion. The IMLs of V, P and X at regions 1 and 2, and P and X at region 3 were significantly lower than that of B, however, those of V at region 3 and the other three groups at region 4 were not significantly different from that of B. At region 1, P and X showed significantly lower IMLs than V. At region 2, the IML of X showed significantly lower IML than V. There was no significant difference between P and X. The LD values of V, P and X at all regions were not significantly different from that of B. Fluoride, strontium and silicate ions released from the S-PRG filler would provide a favorable environment for remineralization of the demineralized dentin in P.
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Funada M, Tomiyama K, Wada K. P-47 * HARMFUL EFFECTS OF LAW-EVADING HERBS AS A NEW TREND IN JAPAN: BEHAVIORAL AND CYTOTOXICOLOGICAL PROPERTIES OF SYNTHETIC CANNABINOIDS. Alcohol Alcohol 2014. [DOI: 10.1093/alcalc/agu054.47] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Fujimoto Y, Masano Y, Ogawa K, Tomiyama K, Kaido T, Uemoto S. Technical Innovations for Hepatic Vein Reconstruction in Living Donor Liver Transplantation. J Surg Res 2014. [DOI: 10.1016/j.jss.2013.11.264] [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: 12/01/2022]
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Masano Y, Fujimoto Y, Kaido T, Ogawa K, Tomiyama K, Hata K, Uemura T, Yoshizawa A, Okamoto S, Hatano E, Mori A, Okajima H, Uemoto S. Intracranial Hemorrhage after Liver Transplantation: A Retrospective Study for 726 Consecutive Transplants. J Surg Res 2014. [DOI: 10.1016/j.jss.2013.11.265] [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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Tomiyama K, Kato R, Hara Y, Kobayashi M, Mishina M, Yanagawa Y, Kinsella A, Koshikawa N, Waddington J. Phenotypic characterization of orofacial movement topography in mutants with disruption of amino acid mechanisms: Glutamate N2A/B/D [GluRε1/2/4] subtypes and the GABA synthesizing enzyme GAD65. Neuroscience 2013; 250:743-54. [DOI: 10.1016/j.neuroscience.2013.07.038] [Citation(s) in RCA: 2] [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] [Received: 03/30/2013] [Revised: 07/02/2013] [Accepted: 07/16/2013] [Indexed: 01/29/2023]
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Kaido T, Ogawa K, Fujimoto Y, Ito T, Tomiyama K, Mori A, Tamai Y, Inagaki N, Uemoto S. OP002 IMPACT OF SARCOPENIA AND PERIOPERATIVE NUTRITIONAL THERAPY ON SURVIVAL IN PATIENTS UNDERGOING LIVING DONOR LIVER TRANSPLANTATION. Clin Nutr 2013. [DOI: 10.1016/s0261-5614(13)60004-7] [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] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kaido T, Ogawa K, Fujimoto Y, Ogura Y, Hata K, Ito T, Tomiyama K, Yagi S, Mori A, Uemoto S. Impact of sarcopenia on survival in patients undergoing living donor liver transplantation. Am J Transplant 2013; 13:1549-56. [PMID: 23601159 DOI: 10.1111/ajt.12221] [Citation(s) in RCA: 270] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Revised: 02/07/2013] [Accepted: 02/09/2013] [Indexed: 02/06/2023]
Abstract
Skeletal muscle depletion, referred to as sarcopenia, predicts morbidity and mortality in patients undergoing digestive surgery. However, the impact on liver transplantation is unclear. The present study investigated the impact of sarcopenia on patients undergoing living donor liver transplantation (LDLT). Sarcopenia was assessed by a body composition analyzer in 124 adult patients undergoing LDLT between February 2008 and April 2012. The correlation of sarcopenia with other patient factors and the impact of sarcopenia on survival after LDLT were analyzed. The median ratio of preoperative skeletal muscle mass was 92% (range, 67-130%) of the standard mass. Preoperative skeletal muscle mass was significantly correlated with the branched-chain amino acids to tyrosine ratio (r = -0.254, p = 0.005) and body cell mass (r = 0.636, p < 0.001). The overall survival rate in patients with low skeletal muscle mass was significantly lower than in patients with normal/high skeletal muscle mass (p < 0.001). Perioperative nutritional therapy significantly increased overall survival in patients with low skeletal muscle mass (p = 0.009). Multivariate analysis showed that low skeletal muscle mass was an independent risk factor for death after transplantation. In conclusion, sarcopenia was closely involved with posttransplant mortality in patients undergoing LDLT. Perioperative nutritional therapy significantly improved overall survival in patients with sarcopenia.
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Affiliation(s)
- T Kaido
- Division of Hepato-Biliary-Pancreatic and Transplant Surgery, Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
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Shiiya T, Mukai Y, Tomiyama K, Teranaka T. Anti-demineralization effect of a novel fluoride-releasing varnish on dentin. Am J Dent 2012; 25:347-350. [PMID: 23409625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
PURPOSE To investigate the laboratory anti-demineralization effect of a novel fluoride-releasing varnish containing surface reaction-type prereacted glass-ionomer (S-PRG) filler. METHODS Paired specimens were cut from bovine root dentin. One of each pair was used for the S-PRG group, and the other served as a control (n = 6). A 1 x 3 mm test surface was made on each specimen with the fluoride-releasing varnish. The novel fluoride-releasing varnish is categorized as a two-bottle-type self-etch adhesive. These liquids were mixed, applied on the test surface, and light-cured for 10 seconds. As a control, an S-PRG filler-free varnish was applied in the same manner. Each specimen was immersed in 8% methylcellulose gel demineralization system (1.5 mM Ca, 0.9 mM PO4, 0.1 M acetic acid, pH 5.0) for 7 days at 3 degrees C. The mineral profiles and integrated mineral loss (IML) of the lesions were obtained by transversal microradiography and analytical software. RESULTS The S-PRG group exhibited significantly thicker surface layer than the control group. Furthermore, the S-PRG group showed significantly lower IML (3,459 vol% xmicropm) than the control group (4,687 vol% xmicropm) ( P < 0.05, Welch's two-sample t-test). The novel fluoride-releasing varnish increased acid resistance of root dentin in the vicinity of the coated surface.
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Affiliation(s)
- Toru Shiiya
- Division of Restorative Dentistry, Department of Oral Medicine, Kanagawa Dental College, 82 Inaoka-cho, Yokosuka, Kanagawa 238-8580, Japan
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Tomiyama K, Yamamoto K, Sashikata T. [Solid follicular bronchiolitis]. Kyobu Geka 2010; 63:1035-1038. [PMID: 21066843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A 64-year-old man presented a nodular shadow in the right lower lobe on a chest computed tomography (CT) scan. The nodule had grown remarkably in 3 years and was suspected to be a lung cancer. An open lung biopsy showed a solid lesion adjacent to lung abscess, and histopathological examination of a biopsy specimen revealed follicular bronchiolitis. Follicular bronchiolitis is a rare condition and is reported to occur mainly in association with connective tissue disorders or immunodeficiency syndromes. In such conditions, it generally exhibits bilateral, diffuse, small nodular lesions or ground-glass opacities. The present case was not associated with such underlying diseases and was thought to have occurred in association with lung abscess. Few cases of follicular bronchiolitis caused by non-specific airway infection have been reported in Japan.
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Affiliation(s)
- K Tomiyama
- Department of Thoracic Surgery, Saiseikai Hyogoken Hospital, Kobe, Japan
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Kohmoto J, Nakao A, Stolz DB, Kaizu T, Tsung A, Ikeda A, Shimizu H, Takahashi T, Tomiyama K, Sugimoto R, Choi AMK, Billiar TR, Murase N, McCurry KR. Carbon monoxide protects rat lung transplants from ischemia-reperfusion injury via a mechanism involving p38 MAPK pathway. Am J Transplant 2007; 7:2279-90. [PMID: 17711551 DOI: 10.1111/j.1600-6143.2007.01940.x] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Carbon monoxide (CO) provides protection against oxidative stress via anti-inflammatory and cytoprotective actions. In this study, we tested the hypothesis that a low concentration of exogenous (inhaled) CO would protect transplanted lung grafts from cold ischemia-reperfusion injury via a mechanism involving the mitogen-activated protein kinase (MAPK) signaling pathway. Lewis rats underwent orthotopic syngeneic or allogeneic left lung transplantation with 6 h of cold static preservation. Exposure of donors and recipients (1 h before and then continuously post-transplant) to 250 ppm CO resulted in significant improvement in gas exchange, reduced leukocyte sequestration, preservation of parenchymal and endothelial cell ultrastructure and reduced inflammation compared to animals exposed to air. The beneficial effects of CO were associated with p38 MAPK phosphorylation and were significantly prevented by treatment with a p38 MAPK inhibitor, suggesting that CO's efficacy is at least partially mediated by activation of p38 MAPK. Furthermore, CO markedly suppressed inflammatory events in the contralateral naïve lung. This study demonstrates that perioperative exposure of donors and recipients to CO at a low concentration can impart potent anti-inflammatory and cytoprotective effects in a clinically relevant model of lung transplantation and support further evaluation for potential clinical use.
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Affiliation(s)
- J Kohmoto
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, USA
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Aono Y, Saigusa T, Watanabe S, Iwakami T, Mizoguchi N, Ikeda H, Ishige K, Tomiyama K, Oi Y, Ueda K, Rausch WD, Waddington JL, Ito Y, Koshikawa N, Cools AR. Role of alpha adrenoceptors in the nucleus accumbens in the control of accumbal noradrenaline efflux: a microdialysis study with freely moving rats. J Neural Transm (Vienna) 2007; 114:1135-42. [PMID: 17533511 DOI: 10.1007/s00702-007-0745-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2007] [Accepted: 04/12/2007] [Indexed: 11/25/2022]
Abstract
Microdialysis technique was used to study the effects of the locally applied alpha adrenoceptor agonist phenylephrine and antagonist phentolamine on the basal noradrenaline efflux as well as on the noradrenaline uptake inhibitor desipramine-elicited noradrenaline efflux in the nucleus accumbens (NAc) of freely moving rats. Tetrodotoxin reduced basal noradrenaline efflux by 72%, whereas desipramine increased it by 204%. Phenylephrine reduced the basal noradrenaline efflux by 32% and phentolamine blocked this effect. Phentolamine elevated the basal noradrenaline efflux by 150% and phenylephrine counteracted this effect. The desipramine-elicited noradrenaline efflux was not affected by phenylephrine, but enhanced by phentolamine. Desipramine counteracted the effects of phenylephrine and potentiated those of phentolamine. These results indicate that the accumbal noradrenaline efflux is under inhibitory control of alpha adrenoceptors that are suggested to be presynaptically located on adrenergic nerve terminals in the NAc. Furthermore, this study suggests that the conformational state of alpha adrenoceptors varies across the available amount of noradrenaline. The clinical impact of these data is discussed.
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Affiliation(s)
- Y Aono
- Department of Pharmacology, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan
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Ikeda A, Nakao A, Tomiyama K, Faleo G, Kohmoto J, Ross M, Stolz D, Geller D, Murase N. 1. J Surg Res 2007. [DOI: 10.1016/j.jss.2006.12.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Nakao A, Toyokawa H, Tsung A, Nalesnik MA, Stolz DB, Kohmoto J, Ikeda A, Tomiyama K, Harada T, Takahashi T, Yang R, Fink MP, Morita K, Choi AMK, Murase N. Ex vivo application of carbon monoxide in University of Wisconsin solution to prevent intestinal cold ischemia/reperfusion injury. Am J Transplant 2006; 6:2243-55. [PMID: 16827783 DOI: 10.1111/j.1600-6143.2006.01465.x] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Carbon monoxide (CO), a byproduct of heme catalysis, was shown to have potent cytoprotective and anti-inflammatory effects. In vivo recipient CO inhalation at low concentrations prevented ischemia/reperfusion (I/R) injury associated with small intestinal transplantation (SITx). This study examined whether ex vivo delivery of CO in University of Wisconsin (UW) solution could ameliorate intestinal I/R injury. Orthotopic syngenic SITx was performed in Lewis rats after 6 h cold preservation in control UW or UW that was bubbled with CO gas (0.1-5%) (CO-UW). Recipient survival with intestinal grafts preserved in 5%, but not 0.1%, CO-UW improved to 86.7% (13/15) from 53% (9/17) with control UW. At 3 h after SITx, grafts stored in 5% CO-UW showed improved intestinal barrier function, less mucosal denudation and reduced inflammatory mediator upregulation compared to those in control UW. Preservation in CO-UW associated with reduced vascular resistance (end preservation), increased graft cyclic guanosine monophosphate levels (1 h), and improved graft blood flow (1 h). Protective effects of CO-UW were reversed by ODQ, an inhibitor of soluble guanylyl cyclase. In vitro culture experiment also showed better preservation of vascular endothelial cells with CO-UW. The study suggests that ex vivo CO delivery into UW solution would be a simple and innovative therapeutic strategy to prevent transplant-induced I/R injury.
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Affiliation(s)
- A Nakao
- Thomas E. Starzl Transplantation Institute, University of Pittsburgh, Pennsylvania, USA.
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Tomiyama K, Takahashi M, Fujii T, Kunisue H, Kanaya Y, Maruyama S, Yokoyama N, Shimizu N, Soda M. A rare case of recurrent alpha-fetoprotein-producing gastric cancer without re-elevation of serum AFP. J Int Med Res 2006; 34:109-14. [PMID: 16604831 DOI: 10.1177/147323000603400114] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
We report an extremely rare case of recurrent alpha-fetoprotein (AFP)-producing gastric cancer without re-elevation of serum AFP. The patient was a 78-year-old woman with AFP-producing gastric cancer, a rare type of gastric adenocarcinoma. A Borrmann III gastric tumour was surgically resected and AFP-producing gastric cancer was diagnosed based on high levels of serum AFP (705.44 ng/ml) and immunohistochemical examination of the tumour. The serum AFP level decreased to the normal range after resection without any sign of recurrence by imaging, but the patient developed local recurrence of the cancer and died 13 months after surgery. No re-elevation of serum AFP levels was observed after recurrence. Although serum AFP levels are believed to be useful for follow-up in the post-operative period, the possibility that serum AFP levels do not always correlate with the extent of the cancer should be kept in mind.
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Affiliation(s)
- K Tomiyama
- Department of Cancer and Thoracic Surgery, Okayama University Graduate School of Medicine and Dentistry, Okayama, Japan.
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Shimomura Y, Sato N, Tomiyama K, Takahashi A, Ito M. A sporadic case of epidermolytic hyperkeratosis caused by a novel point mutation in the keratin 1 gene. Clin Exp Dermatol 2006; 31:286-7. [PMID: 16487115 DOI: 10.1111/j.1365-2230.2005.01998.x] [Citation(s) in RCA: 5] [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: 01/22/2023]
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Mukai Y, Tomiyama K, Shiiya T, Kamijo K, Fujino F, Teranaka T. Formation of inhibition layers with a newly developed fluoride-releasing all-in-one adhesive. Dent Mater J 2005; 24:172-7. [PMID: 16022435 DOI: 10.4012/dmj.24.172] [Citation(s) in RCA: 24] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study evaluated the capability of a novel fluoride-releasing, all-in-one adhesive system on forming inhibition layer (radio-opaque layer) as compared with other adhesive systems. Dentin surface was treated with Imperva bond (IB), FL-BOND (FB), Reactmer bond (RE), or FL-BOND S-1 (FS) (which is a novel system). Untreated specimens were categorized as nonbonding group (NB). After storing for 10 days in de-ionized water, the specimens were cut into halves perpendicularly to the pulp chamber and immersed in a buffered demineralizing solution for four days. Longitudinal sections were cut and microradiographed. The width of inhibition layers adjacent to the adhesive surface--at a depth of 50 microm under the demineralization surface--was analyzed. Microradiography revealed distinct inhibition layers adjacent to the experimental surfaces of FB, RE, and FS. No inhibition layers were observed in NB and IB. In particular, the width of the inhibition layer of FS (12.5 microm) was significantly greater than those of FB and RE. These results indicated that a newly developed all-in-one adhesive system, FS, may have a superior ability of forming inhibition layers adjacent to cavity walls, and that it may also protect dentin against further demineralization in case of secondary marginal caries.
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Affiliation(s)
- Yoshiharu Mukai
- Department of Dental Medicine, Division of Operative Dentistry and Endodontics, Kanagawa Dental College, 82 Inaoka-cho, Yokosuka, Kanagawa 238-8580, Japan.
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Tomiyama K, Mukai Y, Okada S, Negishi H, Fujihara T, Kawase T, Ueda M, Nakagawa S, Teranaka T. Durability of FTLA treatment as a medicament for dentin hypersensitivity--abrasion resistance and profiles of fluoride release. Dent Mater J 2005; 23:585-92. [PMID: 15688723 DOI: 10.4012/dmj.23.585] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The purpose of this study was to evaluate the durability of tubules occluded with FTLA treatment by toothbrush abrasion test on the applied surface and by measuring fluoride release from the FTLA components. Dentin specimens with simulated hypersensitive surfaces were treated with APF containing tannic acid. After which, the specimens received lanthanum-chloride-with-powdered-fluoroapatite-glass-ceramics treatment. The specimens were subjected to toothbrush abrasion test up to 6,000 strokes. SEM observation revealed that dentinal tubules of the FTLA treated specimens were completely occluded with fine deposits even after toothbrush abrasion of 6,000 strokes. EPMA analysis revealed that fluoride, lanthanum, and aluminum were the main FTLA components on the dentin surface after 6,000-stroke abrasion. To measure fluoride release from the FTLA components, a slurry was enclosed in a cellulose tube and suspended in deionized water at 37 degrees C. After fluoride was dialyzed against deionized water, a high concentration of fluoride was found to be released from FTLA the components, indicating FTLA treatment's prominent durability. These results suggested that FTLA treatment has a superior resistance against toothbrush abrasion and a high fluoride-releasing performance. These characteristics lend much weight to showing that the FTLA method is an effective and durable medicament for dentin hypersensitivity.
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Affiliation(s)
- Kiyoshi Tomiyama
- Department of Oral Medicine, Division of Operative Dentistry and Endodontics, Kanagawa Dental College, 82 Inaoka-cho, Yokosuka, Kanagawa 238-8580, Japan.
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33
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Tomiyama K, Ishida H, Miyake M, Taki T, Koh S, Okuno T. [Surgically treated mucoepidermoid carcinoma in a 6-year-old boy; report of a case]. Kyobu Geka 2003; 56:505-8. [PMID: 12795159] [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: 03/03/2023]
Abstract
A 6-year-old boy was admitted to our hospital with a history of recurrent obstructive pneumonia and hemoptysis. A chest computed tomography (CT) showed atelectasis in the left lower lobe. Angiograpy, which was performed for the suspicion of pulmonary sequestration, showed no feeding artery and revealed bleeding from the bronchial artery in the left lower lobe. As hemoptysis would not stop, an emergency left lower lobectomy was performed. Macroscopic examination of the resected specimen revealed a mass measuring 20 x 15 x 17 mm in the S8 proximal lung parenchyma, bronchiectasis, and an abscess in the distal lung parenchyma. Histopathologic examination determined the tumor was a mucoepidermoid carcinoma. Immunohistochemical staining revealed some tumor cells were positive for CA 19-9. The child has not had a recurrence 3 years postoperatively.
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Affiliation(s)
- K Tomiyama
- Department of Chest Surgery, Kitano Hospital, The Tazuke Kofukai Medical Research Institute, Osaka, Japan
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34
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Tomiyama K, McNamara FN, Clifford JJ, Kinsella A, Drago J, Tighe O, Croke DT, Koshikawa N, Waddington JL. Phenotypic resolution of spontaneous and D1-like agonist-induced orofacial movement topographies in congenic dopamine D1A receptor 'knockout' mice. Neuropharmacology 2002; 42:644-52. [PMID: 11985822 DOI: 10.1016/s0028-3908(02)00023-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
A novel system was used to assess the role of D(1)-like dopamine receptors in distinct topographies of orofacial movements in mice with congenic D(1A) receptor knockout. Under spontaneous conditions, vertical jaw movements in wild-types declined with time at a rate that was reduced in D(1A) mutants, while horizontal jaw movements emerged progressively in wild-types but not in D(1A) mutants; tongue protrusions were absent in D(1A) mutants, while incisor chattering was initially reduced in D(1A) mutants but rose subsequently to reach the level of wild-types. D(1A) receptors exert a topographically specific role in regulating individual spontaneous orofacial movements, and these involve interactions with psychomotor processes which 'sculpt' behavioural change over time. The anomalous D(1)-like agonist SK&F 83959, which fails to stimulate, and indeed inhibits the stimulation of adenylyl cyclase induced by dopamine, readily stimulated vertical jaw movements, tongue protrusions and incisor chattering, and these response topographies were absent in D(1A) mutants. These results suggest that D(1A) receptors may exert some form of permissive role over orofacial topographies initiated via a novel, putative D(1)-like site not linked to adenylyl cyclase, or that some D(1A) receptors might be coupled to a transduction system other than adenylyl cyclase.
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MESH Headings
- 2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine/analogs & derivatives
- 2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine/pharmacology
- Animals
- Dopamine Agonists/pharmacology
- Facial Muscles/drug effects
- Facial Muscles/physiology
- Female
- Incisor/drug effects
- Incisor/physiology
- Jaw/drug effects
- Jaw/physiology
- Male
- Mice
- Mice, Congenic
- Mice, Inbred C57BL
- Mice, Knockout
- Movement/drug effects
- Movement/physiology
- Mutation/physiology
- Phenethylamines/pharmacology
- Phenotype
- Receptors, Dopamine D1/agonists
- Receptors, Dopamine D1/deficiency
- Receptors, Dopamine D1/genetics
- Tongue/drug effects
- Tongue/physiology
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Affiliation(s)
- K Tomiyama
- Department of Clinical Pharmacology, Royal College of Surgeons in Ireland, St Stephen's Green, Dublin 2, Ireland
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35
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Affiliation(s)
- T Nakagawa
- Department of Otolaryngology, Yodogawa Christian Hospital, Osaka, Japan.
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36
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Baba Y, Honma T, Takei S, Suzuki K, Arai F, Kobayashi M, Sugimura K, Narisawa R, Takahashi T, Asakura H, Tomiyama K, Ajioka Y. [A case of ulcerative colitis with Sweet's syndrome]. Nihon Shokakibyo Gakkai Zasshi 2001; 98:1278-82. [PMID: 11729655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Affiliation(s)
- Y Baba
- Third Department of Internal Medicine, Niigata University School of Medicine
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37
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Sakai H, Horinouchi H, Tomiyama K, Ikeda E, Takeoka S, Kobayashi K, Tsuchida E. Hemoglobin-vesicles as oxygen carriers: influence on phagocytic activity and histopathological changes in reticuloendothelial system. Am J Pathol 2001; 159:1079-88. [PMID: 11549600 PMCID: PMC1850444 DOI: 10.1016/s0002-9440(10)61783-x] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Hemoglobin-vesicles (HbV) have been developed for use as artificial oxygen carriers (particle diameter, 250 nm) in which a purified Hb solution is encapsulated with a phospholipid bilayer membrane. The influence of HbV on the reticuloendothelial system was studied by carbon clearance measurements and histopathological examination. The HbV suspension ([Hb] = 10 g/dl) was intravenously infused in male Wistar rats at dose rates of 10 and 20 ml/kg, and the phagocytic activity was measured by monitoring the rate of carbon clearance at 8 hours and at 1, 3, 7, and 14 days after infusion. The phagocytic activity transiently decreased one day after infusion by about 40%, but it recovered and was enhanced at 3 days, showing a maximum of about twice the quiescent level at 7 days, and then returned to the normal value at 14 days. The initial transient decreased activity indicates a partly, but not completely, suppressed defensive function of the body. The succeeding increased phagocytic activity corresponds to the increased metabolism of HbV. The histopathological examination with anti-human Hb antibody, hematoxylin/eosin, and oil red O stainings showed that HbV was metabolized within 7 days. Hemosiderin was very slightly confirmed with Berlin blue staining at 3 and 7 days in liver and spleen, though they completely disappeared at 14 days, indicating that the heme metabolism, excretion or recycling of iron proceeded smoothly and iron deposition was minimal. Electron microscopic examination of the spleen and liver tissues clearly demonstrated the particles of HbV with a diameter of about 1/40 of red blood cells in capillaries, and in phagosomes as entrapped in the spleen macrophages and Kupffer cells one day after infusion. The vesicular structure could not be observed at 7 days. Even though the infusion of HbV modified the phagocytic activity for 2 weeks, it does not seem to cause any irreversible damage to the phagocytic organs. These results offer important information for evaluating the safety issues of HbV for clinical use.
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Affiliation(s)
- H Sakai
- Department of Polymer Chemistry, Waseda University, Tokyo, Japan
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38
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Nakagawa T, Shigeta T, Takashima T, Tomiyama K. Magnetic resonance angiography evaluation of basilar artery stenosis in patients with vertebrobasilar insufficiency. Eur Arch Otorhinolaryngol 2001; 257:409-11. [PMID: 11073188 DOI: 10.1007/s004059900227] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
To assess the usefulness of evaluating basilar arterial flow by magnetic resonance angiography (MRA), MRA results for patients with vertebrobasilar insufficiency (VBI) were compared with those for age-matched individuals with no vestibular disorders. The presence of stenosis in the basilar artery, its severity and the presence of complications associated with atherosclerosis in the two groups were statistically compared. Analyses revealed significant differences in the incidence of stenosis, its severity, and the incidence of complications between the two groups. These findings suggest that MRA is valuable for the estimation of vertebrobasilar hemodynamics. MRA evaluation of basilar artery stenosis appears to be suitable for identifying a high-risk group among VBI patients, since basilar artery stenosis can result in serious disabilities.
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Affiliation(s)
- T Nakagawa
- Department of Otorhinolaryngology, Yodogawa Christian Hospital, Osaka, Japan.
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39
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Waddington JL, Clifford JJ, McNamara FN, Tomiyama K, Koshikawa N, Croke DT. The psychopharmacology-molecular biology interface: exploring the behavioural roles of dopamine receptor subtypes using targeted gene deletion ('knockout'). Prog Neuropsychopharmacol Biol Psychiatry 2001; 25:925-64. [PMID: 11383985 DOI: 10.1016/s0278-5846(01)00152-x] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In the absence of selective agonists and antagonists able to discriminate between individual members of the D1-like and D2-like families of dopamine receptor subtypes, functional parcellation has remained problematic. 'Knockout' of these subtypes by targeted gene deletion offers a new approach to evaluating their roles in the regulation of behaviour. Like any new technique, 'knockout' has associated with it a number of methodological limitations that are now being addressed in a systematic manner. Studies on the phenotype of D1(A/1), D(1B/5), D2, D3 and D4 'knockouts' at the level of spontaneous and agonist/antagonist-induced behaviour are reviewed, in terms of methodological issues, neuronal implications and potential clinical relevance. Dopamine receptor subtype 'knockout' is a nascent technology that is now beginning to fulfil its potential. It is being complemented by more systematic phenotypic characterisation at the level of behaviour and additional, molecular biologically-based approaches.
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Affiliation(s)
- J L Waddington
- Department of Clinical Pharmacology, Royal College of Surgeons in Ireland, Dublin
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40
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Tomiyama K, McNamara FN, Clifford JJ, Kinsella A, Koshikawa N, Waddington JL. Topographical assessment and pharmacological characterization of orofacial movements in mice: dopamine D(1)-like vs. D(2)-like receptor regulation. Eur J Pharmacol 2001; 418:47-54. [PMID: 11334864 DOI: 10.1016/s0014-2999(01)00908-6] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A novel procedure for the assessment of orofacial movement topographies in mice was used to study, for the first time, the individual and interactive involvement of dopamine D(1)-like vs. D(2)-like receptors in their regulation. The dopamine D(1)-like receptor agonists A 68930 ([1R,3S]-1-aminomethyl-5,6-dihydroxy-3-phenyl-isochroman) and SK&F 83959 (3-methyl-6-chloro-7,8-dihydroxy-1-[3-methyl-phenyl]-2,3,4,5-tetrahydro-1H-3-benzazepine) each induced vertical jaw movements with tongue protrusions and incisor chattering. The dopamine D(1)-like receptor antagonists SCH 23390 ([R]-3-methyl-7-chloro-8-hydroxy-1-phenyl-2,3,4,5-tetrahydro-1H-3-benzazepine) and BW 737C ([S]-6-chloro-1-[2,5-dimethoxy-4-propylbenzyl]-7-hydroxy-2-methyl-1,2,3,4-tetrahydroisoquinoline) antagonised these responses, while the dopamine D(2)-like receptor antagonist YM 09151-2 (cis-N-[1-benzyl-2-methyl-pyrrolidin-3-yl]-5-chloro-2-methoxy-4-methylaminobenzamide) attenuated those to SK&F 83959 and released horizontal jaw movements. These findings suggest some role for a dopamine D(1)-like receptor that is coupled to a transduction system other than/additional to adenylyl cyclase, and for dopamine D(1)-like:D(2)-like receptor interactions, in the regulation of individual orofacial movement topographies in the mouse. This methodology will allow the use of knockout mice to clarify the roles of individual dopamine receptor subtypes in their regulation.
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Affiliation(s)
- K Tomiyama
- Department of Clinical Pharmacology, Royal College of Surgeons in Ireland, 123 St. Stephen's Green, 2, Dublin, Ireland
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41
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Nakagawa T, Takashima T, Tomiyama K. Differential diagnosis of a lateral cervical cyst and solitary cystic lymph node metastasis of occult thyroid papillary carcinoma. J Laryngol Otol 2001; 115:240-2. [PMID: 11244539 DOI: 10.1258/0022215011907109] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We present a case of solitary cystic lymph node metastasis from an occult thyroid papillary carcinoma mimicking a lateral cervical cyst, and a case of thyroid papillary carcinoma with a true lateral cervical cyst. Based on a comparison of the radiographical findings of the two cases, differential diagnosis between cystic lymph node metastasis of papillary carcinoma and branchial cyst is discussed.
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Affiliation(s)
- T Nakagawa
- Department of Otorhinolaryngology, Yodogawa Christian Hospital, Osaka, Japan.
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42
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Minagawa M, Ito A, Shimura H, Tomiyama K, Ito M, Kawai K. Homogeneous epithelial gamma delta T cell repertoire of the skin is shaped through peripheral selection. J Dermatol Sci 2001; 25:150-5. [PMID: 11164711 DOI: 10.1016/s0923-1811(00)00119-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
In contrast to the T cell receptor (TCR) diversity of major alpha beta T cells in lymphoid tissues, epithelial T cells of the murine skin, called dendritic epidermal T cells (DETC), express exclusively an invariant gamma delta TCR. Fetal thymic precursors of DETC immigrate to the skin before birth, and in adult mice T cells expressing the canonical gamma delta TCR identical to that of DETC are not found in other lymphoid or epithelial tissues. Here, we show that DETC precursors migrate to the gut as well as to the skin during fetal periods, but preferentially survive and expand in the skin after birth. We propose that similar to the thymic selection of the diverse alpha beta T cell repertoire, 'peripheral selection' of the homogeneous epithelial gamma delta T cell repertoire may be mediated by TCR signaling upon the recognition of the self-ligand, because the ligand for the DETC TCR was expressed only in the skin.
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Affiliation(s)
- M Minagawa
- Department of Dermatology, Niigata University School of Medicine, 1-757 Asahimachi-dori, Niigata 951-8510, Japan
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43
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Abstract
Recent advances in endoscopic sinus surgery suggested the potential for its surgical application to pituitary surgery. A number of institutions have reported the advantage of endoscope use in pituitary surgery, which is now widely accepted, but approaches to the sella vary in the literature. We retrospectively studied sella approaches in endoscopic pituitary surgery as rhinologists. Subjects included 6 cases of pituitary adenoma and 2 cases of Rathke's cleft cyst. A both-nostril transnasal transsphenoidal approach, our standard technique, was used in 6 cases. This approach consisted of elevation of mucoperiosteal flaps, resection of the vomer and sphenoid anterior wall, and opening of the sellar floor. Elevated mucoperiosteal flaps were used to close of the sella after tumor resection. All tumors were removed and no significant postoperative complications occurred. We found the both-nostril transnasal approach to be easy and time-saving and provided surgeon with a broad surgical field necessary to treat large tumors and accidental cases. Postoperative observation of the sella was easy for wide opening of the anterior wall of the sphenoid sinus. In our experience with reoperation, we quickly accessed the sella and easily removed tumors in the second operation. Our technique therefore has an advance in treatment of recurrence. The both-nostril transnasal approach involves the same procedures as median drainage of the sphenoid sinus, so our technique may have advantages in preventing mucocele of the sphenoid sinus as a late complication of transsphenoidal surgery. The transnasal transsphenoidal approach via both nostrils is preferable rhinologically.
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Affiliation(s)
- T Nakagawa
- Department of Otolaryngology, Yodogawa Christian Hospital, Osaka
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44
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Miyaji C, Watanabe H, Toma H, Akisaka M, Tomiyama K, Sato Y, Abo T. Functional alteration of granulocytes, NK cells, and natural killer T cells in centenarians. Hum Immunol 2000; 61:908-16. [PMID: 11053634 DOI: 10.1016/s0198-8859(00)00153-1] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The immune system in centenarians was characterized as elevated levels in the proportion and number of granulocytes, NK cells, and extrathymic T cells (including NKT cells) in the peripheral blood. Conventional T cells, abundant in youth, were decreased in proportion and number. In addition to this numerical change in centenarians, the function was significantly altered in comparison with that in middle-aged subjects. The phagocytic function and cytokine production of granulocytes in centenarians increased whereas the production of superoxides from granulocytes decreased. This tendency was almost the same in both healthy and unhealthy centenarians. IFN gamma production by NK and extrathymic T cells in centenarians seemed to be augmented and resulted in an elevated level of serum IFN gamma. Possibly due to the effect of this endogenous IFN gamma, the proportion of CD64(+) (Fc gamma RI) cells among granulocytes was elevated. The expansion of CD64 antigens on granulocytes is known to be regulated by IFN gamma and to be associated with their induction of phagocytosis. These results suggest that the immune system of centenarians is not merely impaired, but altered in terms of the number and functions of granulocytes, NK cells, NKT cells.
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Affiliation(s)
- C Miyaji
- Department of Immunology, Niigata University School of Medicine, Asahimachidori, Niigata, Japan
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45
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Abstract
The glomangioma is a hyperplastic lesion of the glomus body. This uncommon tumor is seldom located in the nasal cavity or paranasal sinuses. We present what is to our knowledge the eleventh documented case of an intranasal glomangioma. The differential diagnosis of this lesion, its symptoms, pathogenesis and therapy are discussed. Complete excision is normally curative for this tumor.
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Affiliation(s)
- T Nakagawa
- Department of Otorhinolaryngology, Yodogawa Christian Hospital, Osaka, Japan
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46
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Mizuno K, Kanda Y, Kuroki Y, Tomiyama K, Watanabe Y. Phosphorylation of extracellular signal-regulated kinases 1 and 2 in 3T3-L1 adipocytes by stimulation of beta(3)-adrenoceptor. Eur J Pharmacol 1999; 385:63-9. [PMID: 10594345 DOI: 10.1016/s0014-2999(99)00733-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Recent studies have revealed that activated extracellular signal-regulated kinases (ERKs) 1 and 2 by the stimulation of beta(3)-adrenoceptors played a critical role in cell survival in brown adipocytes. On the other hand, phosphorylation of ERK1/2 via beta(3)-adrenoceptors and its physiological and pathological significance in white adipocyte has remained uncertain despite the increasing significance of functioning white adipocytes. Accordingly, we here studied phosphorylation of ERK1/2 caused by the stimulation of beta(3)-adrenoceptors in 3T3-L1 adipocytes, and the roles of phosphorylated ERK1/2 in lipolysis. Phosphorylation of ERK1/2 was induced by a selective beta(3)-adrenoceptor agonist, DL-4-[2'-¿2-hydroxy-2-(3-chlorophenyl)ethylamino¿propyl] phenoxyacetic acid sodium salt sesquihydrate (BRL37344), in 3T3-L1 adipocytes in a time- and dose-dependent manner. The phosphorylation of ERK1/2 by BRL37344 was sensitive to the cyclic AMP (cAMP)-dependent protein kinase inhibitor, N-[2-((p-bromocinnamyl)amino)ethyl]-5-isoquinolinesulfonamide (H89). To elucidate the roles of phosphorylated ERK1/2 in lipolysis, the effect of a selective inhibitor of ERK1/2 phosphorylation, 2'-amino-3'-methoxyflavone (PD98059), was examined. This inhibitor did not alter the lipolytic action caused by BRL37344, even at concentrations sufficient to block phosphorylation of ERK1/2, suggesting that ERK1/2 play no role in the lipolysis caused by BRL37344 in 3T3-L1 adipocytes.
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Affiliation(s)
- K Mizuno
- Department of Pharmacology, National Defense Medical College, 3-2 Namiki, Tokorozawa, Japan
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47
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Tomiyama K, Nishio E, Watanabe Y. Both wortmannin and simvastatin inhibit the adipogenesis in 3T3-L1 cells during the late phase of differentiation. Jpn J Pharmacol 1999; 80:375-8. [PMID: 10496339 DOI: 10.1254/jjp.80.375] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
As we reported previously, both wortmannin and lovastatin inhibit the differentiation in 3T3-L1 cells when these drugs were applied during the insulin-induced cell differentiation. In the present study, 3T3-L1 cells were treated with wortmannin and simvastatin after the completion of the insulin-stimulation, and differentiation was found to be significantly decreased by these drugs. This suggests intracellular signaling pathways play roles in the differentiation of 3T3-L1 cells even after the completion of the insulin-stimulation and also suggests that not only the early phase (day 0 to day 2) but also the late phase (day 2 to day 4) of differentiation is important for the differentiation of the cells.
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Affiliation(s)
- K Tomiyama
- Department of Pharmacology, National Defense Medical College, Tokorozawa, Saitama, Japan
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48
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Yoshida Y, Koide S, Hirose N, Takada K, Tomiyama K, Koshikawa N, Cools AR. Fentanyl increases dopamine release in rat nucleus accumbens: involvement of mesolimbic mu- and delta-2-opioid receptors. Neuroscience 1999; 92:1357-65. [PMID: 10426490 DOI: 10.1016/s0306-4522(99)00046-9] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The effects of the mu-receptor agonist fentanyl on extracellular levels of dopamine in rat nucleus accumbens were studied in awake animals by in vivo brain microdialysis. Fentanyl dose-dependently increased the levels of dopamine when given intravenously (microg/kg) or via a microdialysis probe placed into the ventral tegmental area or the nucleus accumbens (nmol). The effect of fentanyl given into the nucleus accumbens was blocked by systemic administration of the non-selective opioid receptor antagonist naloxone and by accumbens administration of D-Phe-Cys-Tyr-D-Trp-Om-Thr-Phe-Thr-NH2 (nmol), a mu-opioid receptor antagonist, and naltrindole (nmol), a non-selective delta-opioid receptor antagonist, in a dose-dependent manner. The delta2-opioid receptor antagonist, naltriben (nmol), also blocked the effects of fentanyl, whereas the delta1-opioid receptor antagonist, (E)-7-benzylidenenaltrexone (nmol), was ineffective. When marginally effective doses of D-Phe-Cys-Tyr-D-Trp-Orn-Thr-Phe-Thr-NH2 and naltriben were given simultaneously, the effect of fentanyl was nearly fully blocked; the pretreatment itself had no effect. Administration of the mu-opioid receptor agonist [D-Ala2, N-Me-Phe4,Gly5-ol]-enkephalin (nmol), the delta1-opioid receptor agonist [D-Pen2,5]-enkephalin (nmol) or the delta2-opioid receptor agonist [D-Ala2,Glu4]-deltorphin (nmol) into the nucleus accumbens enhanced the amount of accumbal dopamine. This study provides evidence that not only activation of delta1- and delta2-opioid receptors, but also activation of mu-opioid receptors in the nucleus accumbens increases the release of accumbal dopamine in freely moving rats. We suggest that the effect of intra-accumbens administration of fentanyl upon accumbal release of dopamine is either due to the simultaneous activation of mu-opioid receptors and delta2-opioid receptors or due to activation of mu-opioid receptors that interact with delta2-opioid receptors in a complex manner.
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MESH Headings
- Analgesics, Opioid/pharmacology
- Animals
- Dose-Response Relationship, Drug
- Fentanyl/pharmacology
- Injections, Intravenous
- Limbic System/drug effects
- Limbic System/metabolism
- Male
- Microdialysis
- Narcotic Antagonists/pharmacology
- Nucleus Accumbens/drug effects
- Nucleus Accumbens/metabolism
- Rats
- Rats, Sprague-Dawley
- Receptors, Opioid, delta/agonists
- Receptors, Opioid, delta/antagonists & inhibitors
- Receptors, Opioid, delta/drug effects
- Receptors, Opioid, mu/agonists
- Receptors, Opioid, mu/antagonists & inhibitors
- Receptors, Opioid, mu/drug effects
- Time Factors
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Affiliation(s)
- Y Yoshida
- Department of Dental Anaesthesiology, Nihon University School of Dentistry, Tokyo, Japan
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49
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Abstract
BACKGROUND Two major mechanisms of T cell-mediated cytotoxicity are known: perforin-dependent and Fas-dependent cytotoxic pathways. Previous studies in vitro demonstrated that CD4+ cytotoxic T lymphocytes use the Fas pathway as a primary cytotoxic mechanism, but the cytotoxic mechanisms used by CD4+ T cells in vivo are unclear. METHODS We examined the cytotoxic pathways of CD4+ T cells in vivo using a skin allograft model, in which athymic nu/nu mice were transplanted with skin allografts and reconstituted with purified CD4+T cells. Fas-deficient and perforin-deficient mice and anti-tumor necrosis factor (TNF)-alpha monoclonal antibody were used for inactivating each cytotoxic pathway in vivo. RESULTS The skin allografts from Fas-deficient mice were readily rejected by the athymic mice reconstituted with purified CD4+ T cells. Perforin-deficient CD4+ T cells could also reject Fas-deficient skin allografts. Furthermore, in vivo treatment with anti-TNF-alpha monoclonal antibody did not prevent the allograft rejection by CD4+ T cells in the absence of both Fas and perforin pathways. CONCLUSIONS These results indicate participation of undefined mechanisms other than Fas, perforin, and TNF-alpha pathways in CD4+ T cell-mediated cytotoxicity in vivo.
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Affiliation(s)
- A Ito
- Department of Dermatology, Niigata University School of Medicine, Japan
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Aiba T, Sugiura M, Mori J, Matsumoto K, Tomiyama K, Okuda F, Nakai Y. Effect of zinc sulfate on sensorineural olfactory disorder. Acta Otolaryngol Suppl 1999; 538:202-4. [PMID: 9879421 DOI: 10.1080/00016489850182936] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
We administered zinc sulfate to patients with sensorineural (post-viral, post-traumatic, or unknown aetiology) olfactory disorder and examined its effects. The patients were divided into three groups by method of treatment: zinc sulfate only, combination of zinc sulfate and the usual therapy, or the usual therapy. For disorders of post-viral and unknown aetiologies, there were no significant differences in improvement among the three groups. However, for post-traumatic olfactory disorder, the zinc sulfate groups had significantly higher improvement rates than did the group that received the usual therapy. The difference between post-traumatic and post-viral olfactory disorders in the effect of zinc sulfate therapy appeared to depend on the pathology of the associated lesions. In cases of post-traumatic olfactory disorder, regenerative capacity is retained in the olfactory epithelium because the blast cells of olfactory receptor cells remain intact. However, for post-viral olfactory disorder, the lack of olfactory receptor cells and blast cells due to viral infection results in loss of regenerative capacity. We also determined pre-treatment serum zinc concentrations in those patients who planned to be treated with zinc sulfate. Pre-treatment serum zinc concentration was not significantly related to improvement rates.
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Affiliation(s)
- T Aiba
- Department of Otolaryngology, Osaka City University, Japan.
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