1
|
Yamada H, Motoyama M, Hasegawa N, Miura K, Matsumoto J, Ohi K, Yasui-Furukori N, Numata S, Takeshima M, Sugiyama N, Nagasawa T, Kubota C, Atake K, Tsuboi T, Ichihashi K, Hashimoto N, Inagaki T, Takaesu Y, Iga JI, Hori H, Onitsuka T, Komatsu H, Hishimoto A, Fukumoto K, Fujimoto M, Nakamura T, Nemoto K, Furihata R, Yamamura S, Yamagata H, Ogasawara K, Katsumoto E, Murata A, Iida H, Ochi S, Makinodan M, Kido M, Kishimoto T, Yasuda Y, Usami M, Suwa T, Inada K, Watanabe K, Hashimoto R. A dissemination and education programme to improve the clinical behaviours of psychiatrists in accordance with treatment guidelines for schizophrenia and major depressive disorders: the Effectiveness of Guidelines for Dissemination and Education in Psychiatric Treatment (EGUIDE) project. BJPsych Open 2022; 8:e83. [PMID: 35446248 PMCID: PMC9059732 DOI: 10.1192/bjo.2022.44] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 02/02/2022] [Accepted: 03/04/2022] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Clinical practice guidelines for schizophrenia and major depressive disorder have been published. However, these have not had sufficient penetration in clinical settings. We developed the Effectiveness of Guidelines for Dissemination and Education in Psychiatric Treatment (EGUIDE) project as a dissemination and education programme for psychiatrists. AIMS The aim of this study is to assess the effectiveness of the EGUIDE project on the subjective clinical behaviour of psychiatrists in accordance with clinical practice guidelines before and 1 and 2 years after participation in the programmes. METHOD A total of 607 psychiatrists participated in this study during October 2016 and March 2019. They attended both 1-day educational programmes based on the clinical practice guidelines for schizophrenia and major depressive disorder, and answered web questionnaires about their clinical behaviours before and 1 and 2 years after attending the programmes. We evaluated the changes in clinical behaviours in accordance with the clinical practice guidelines between before and 2 years after the programme. RESULTS All of the scores for clinical behaviours in accordance with clinical practice guidelines were significantly improved after 1 and 2 years compared with before attending the programmes. There were no significant changes in any of the scores between 1 and 2 years after attending. CONCLUSIONS All clinical behaviours in accordance with clinical practice guidelines improved after attending the EGUIDE programme, and were maintained for at least 2 years. The EGUIDE project could contribute to improved guideline-based clinical behaviour among psychiatrists.
Collapse
Affiliation(s)
- Hisashi Yamada
- Department of Neuropsychiatry, Hyogo College of Medicine, Japan; and Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Japan
| | - Mikuni Motoyama
- Department of Neuropsychiatry, Hyogo College of Medicine, Japan
| | - Naomi Hasegawa
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Japan
| | - Kenichiro Miura
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Japan
| | - Junya Matsumoto
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Japan
| | - Kazutaka Ohi
- Department of Psychiatry, Gifu University Graduate School of Medicine, Japan
| | | | - Shusuke Numata
- Department of Psychiatry, Graduate School of Biomedical Science, Tokushima University, Japan
| | - Masahiro Takeshima
- Department of Neuropsychiatry Section of Neuro and Locomotor Science, Akita University Graduate School of Medicine, Japan
| | - Nobuhiro Sugiyama
- Department of Psychiatry, Shinshu University School of Medicine, Japan; and Department of Applied Occupational Therapy, Shinshu University School of Health Sciences, Japan
| | - Tatsuya Nagasawa
- Department of Neuropsychiatry, Kanazawa Medical University, Japan
| | - Chika Kubota
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Japan
| | - Kiyokazu Atake
- Kyushu Health Administration Center, Nippon Telegraph and Telephone West Corporation, Japan
| | - Takashi Tsuboi
- Department of Neuropsychiatry, Kyorin University School of Medicine, Japan
| | - Kayo Ichihashi
- Department of Neuropsychiatry, University of Tokyo Hospital, Japan
| | - Naoki Hashimoto
- Department of Psychiatry, Hokkaido University Graduate School of Medicine, Japan
| | - Takahiko Inagaki
- Adolescent Mental Health Service, Biwako Hospital, Japan; and Department of Psychiatry, Shiga University of Medical Science, Japan
| | - Yoshikazu Takaesu
- Department of Neuropsychiatry, Graduate School of Medicine, University of the Ryukyus, Japan
| | - Jun-ichi Iga
- Department of Neuropsychiatry, Molecules and Function, Ehime University Graduate School of Medicine, Japan
| | - Hikaru Hori
- Department of Psychiatry, Faculty of Medicine, Fukuoka University, Japan
| | - Toshiaki Onitsuka
- Department of Neuroimaging Psychiatry, Graduate School of Medical Sciences, Kyushu University, Japan
| | | | - Akitoyo Hishimoto
- Department of Psychiatry, Yokohama City University Graduate School of Medicine, Japan
| | - Kentaro Fukumoto
- Department of Neuropsychiatry, Iwate Medical University School of Medicine, Japan
| | - Michiko Fujimoto
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Japan; and Department of Psychiatry, Osaka University Graduate School of Medicine, Japan
| | | | - Kiyotaka Nemoto
- Department of Psychiatry, Faculty of Medicine, University of Tsukuba, Japan
| | | | | | - Hirotaka Yamagata
- Division of Neuropsychiatry, Department of Neuroscience, Yamaguchi University School of Medicine, Japan
| | - Kazuyoshi Ogasawara
- Center for Postgraduate Clinical Training and Career Development, Nagoya University Hospital, Japan
| | | | - Atsunobu Murata
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Japan
| | - Hitoshi Iida
- Department of Psychiatry, Faculty of Medicine, Fukuoka University, Japan
| | - Shinichiro Ochi
- Department of Neuropsychiatry, Molecules and Function, Ehime University Graduate School of Medicine, Japan
| | - Manabu Makinodan
- Department of Psychiatry, Faculty of Medicine, Nara Medical University, Japan
| | - Mikio Kido
- Department of Psychiatry, Toyama City Hospital, Japan; and Department of Neuropsychiatry, University of Toyama Graduate School of Medicine and Pharmaceutical Sciences, Japan
| | - Taishiro Kishimoto
- Department of Neuropsychiatry, Keio University School of Medicine, Japan
| | - Yuka Yasuda
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Japan; and Life Grow Brilliant Mental Clinic, Medical Corporation Foster, Japan
| | - Masahide Usami
- Department of Child and Adolescent Psychiatry, Kohnodai Hospital, National Center for Global Health and Medicine, Japan
| | - Taro Suwa
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Japan
| | - Ken Inada
- Department of Psychiatry, Tokyo Women's Medical University, Japan
| | - Koichiro Watanabe
- Department of Neuropsychiatry, Kyorin University School of Medicine, Japan
| | - Ryota Hashimoto
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Japan
| |
Collapse
|
2
|
Ogasawara K, Numata S, Hasegawa N, Nakataki M, Makinodan M, Ohi K, Takeshima M, Tsuboi T, Hashimoto N, Onitsuka T, Muraoka H, Hori H, Ichihashi K, Inagaki T, Yasui-Furukori N, Hishimoto A, Sugiyama N, Fukumoto K, Nagasawa T, Matsumoto J, Takaesu Y, Furihata R, Nemoto K, Nakamura T, Usami M, Miura K, Fujimoto M, Tagata H, Yamada H, Komatsu H, Ochi S, Atake K, Katsumoto E, Kido M, Kishimoto T, Suwa T, Yamamura S, Iga JI, Iida H, Inada K, Watanabe K, Hashimoto R. Subjective assessment of participants in education programs on clinical practice guidelines in the field of psychiatry. Neuropsychopharmacol Rep 2022; 42:221-225. [PMID: 35272393 PMCID: PMC9216374 DOI: 10.1002/npr2.12245] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 01/29/2022] [Accepted: 02/12/2022] [Indexed: 12/29/2022] Open
Abstract
The Effectiveness of Guidelines for Dissemination and Education in psychiatric treatment (EGUIDE) project, which is a nationwide dissemination and implementation program for clinical practice guidelines (CPGs) in the field of psychiatry, is currently ongoing. In the current study, a subjective assessment of the participants in the EGUIDE programs was assessed using a questionnaire. Then, the relationships between the subjective assessment, the characteristics of the participants, and the clinical knowledge of the CPGs were evaluated. More than 90% of the participants gave a high rating for the components of content, recommendation, knowledge, skill, and adherence, but not for the component of confidence. A positive correlation was found between years of professional experience and the score of confidence. These results suggest that it may be necessary to apply the knowledge and skills of CPGs obtained in the education programs into practice to increase confidence in the proper use of psychiatric therapies based on CPGs. Through the educational program of clinical practice guidelines (CPGs; major depressive disorder:MDD and schizophrenia: SC) "EGUIDE," we found that participants gave a high rating for the components of content, recommendation, knowledge, skill, and adherence, but not for the component of confidence. A positive correlation was found between years of professional experience and the score of confidence. These results suggest that it may be necessary to apply the knowledge and skills of CPGs obtained in the education programs into daily practice to increase confidence in the proper use of psychiatric therapies based on CPGs.![]()
Collapse
Affiliation(s)
- Kazuyoshi Ogasawara
- Center for Postgraduate Clinical Training and Career Development, Nagoya University Hospital, Aichi, Japan
| | - Shusuke Numata
- Department of Psychiatry, Graduate School of Biomedical Science, Tokushima University, Tokushima, Japan
| | - Naomi Hasegawa
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Masahito Nakataki
- Department of Psychiatry, Tokushima University Hospital, Tokushima, Japan
| | - Manabu Makinodan
- Department of Psychiatry, Faculty of Medicine, Nara Medical University, Nara, Japan
| | - Kazutaka Ohi
- Department of Psychiatry, Gifu University Graduate School of Medicine, Gifu, Japan
| | - Masahiro Takeshima
- Department of Neuropsychiatry, Akita University Graduate School of Medicine, Akita, Japan
| | - Takashi Tsuboi
- Department of Neuropsychiatry, Kyorin University School of Medicine, Tokyo, Japan
| | - Naoki Hashimoto
- Department of Psychiatry, Hokkaido University Graduate School of Medicine, Hokkaido, Japan
| | - Toshiaki Onitsuka
- Department of Neuroimaging Psychiatry, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hiroyuki Muraoka
- Department of Psychiatry, Tokyo Women's Medical University, Tokyo, Japan
| | - Hikaru Hori
- Department of Psychiatry, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Kayo Ichihashi
- Department of Neuropsychiatry, University of Tokyo Hospital, Tokyo, Japan
| | - Takahiko Inagaki
- Adolescent Mental Health Service, Biwako Hospital, Shiga, Japan.,Department of Psychiatry, Shiga University of Medical Science, Shiga, Japan
| | - Norio Yasui-Furukori
- Department of Psychiatry, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Akitoyo Hishimoto
- Department of Psychiatry, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
| | - Nobuhiro Sugiyama
- Department of Psychiatry, Shinshu University School of Medicine, Nagano, Japan
| | - Kentaro Fukumoto
- Department of Neuropsychiatry, Iwate Medical University School of Medicine, Iwate, Japan
| | - Tatsuya Nagasawa
- Department of Neuropsychiatry, Kanazawa Medical University, Ishikawa, Japan
| | - Junya Matsumoto
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Yoshikazu Takaesu
- Department of Neuropsychiatry, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan
| | | | - Kiyotaka Nemoto
- Department of Psychiatry, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Toshinori Nakamura
- Department of Psychiatry, Shinshu University School of Medicine, Nagano, Japan
| | - Masahide Usami
- Department of Child and Adolescent Psychiatry, Kohnodai Hospital, National Center for Global Health and Medicine, Chiba, Japan
| | - Kenichiro Miura
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Michiko Fujimoto
- Department of Psychiatry, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hiromi Tagata
- Department of Neuropsychiatry, Toho University School of Medicine, Tokyo, Japan
| | - Hisashi Yamada
- Department of Neuropsychiatry, Hyogo College of Medicine, Hyogo, Japan
| | - Hiroshi Komatsu
- Department of Psychiatry, Tohoku University hospital, Miyagi, Japan
| | - Shinichiro Ochi
- Department of Neuropsychiatry, Molecules and Function, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Kiyokazu Atake
- Nippon Telegraph and Telephone West Corporation, Kyushu Health Administration Center, Fukuoka, Japan
| | | | - Mikio Kido
- Department of Psychiatry, Toyama City Hospital, Toyama, Japan.,Department of Neuropsychiatry, University of Toyama Graduate School of Medicine and Pharmaceutical Sciences, Toyama, Japan
| | - Taishiro Kishimoto
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - Taro Suwa
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | | | - Jun-Ichi Iga
- Department of Neuropsychiatry, Molecules and Function, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Hitoshi Iida
- Department of Psychiatry, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Ken Inada
- Department of Psychiatry, Tokyo Women's Medical University, Tokyo, Japan
| | - Koichiro Watanabe
- Department of Neuropsychiatry, Kyorin University School of Medicine, Tokyo, Japan
| | - Ryota Hashimoto
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
| |
Collapse
|
3
|
Iida H, Iga J, Hasegawa N, Yasuda Y, Yamamoto T, Miura K, Matsumoto J, Murata A, Ogasawara K, Yamada H, Hori H, Ichihashi K, Hashimoto N, Ohi K, Yasui-Furukori N, Tsuboi T, Nakamura T, Usami M, Furihata R, Takaesu Y, Iwamoto K, Sugiyama N, Kishimoto T, Tsujino N, Yamada H, Hishimoto A, Nemoto K, Atake K, Muraoka H, Katsumoto E, Oishi S, Inagaki T, Ito F, Imamura Y, Kido M, Nagasawa T, Numata S, Ochi S, Iwata M, Yamamori H, Fujita J, Onitsuka T, Yamamura S, Makinodan M, Fujimoto M, Takayanagi Y, Takezawa K, Komatsu H, Fukumoto K, Tamai S, Yamagata H, Kubota C, Horai T, Inada K, Watanabe K, Kawasaki H, Hashimoto R. Unmet needs of patients with major depressive disorder - Findings from the 'Effectiveness of Guidelines for Dissemination and Education in Psychiatric Treatment (EGUIDE)' project: A nationwide dissemination, education, and evaluation study. Psychiatry Clin Neurosci 2020; 74:667-669. [PMID: 32881226 PMCID: PMC7756454 DOI: 10.1111/pcn.13143] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 08/19/2020] [Accepted: 08/29/2020] [Indexed: 02/06/2023]
Affiliation(s)
- Hitoshi Iida
- Department of Psychiatry, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Junichi Iga
- Department of Neuropsychiatry, Molecules and Function, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Naomi Hasegawa
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
| | | | - Tomoya Yamamoto
- Department of Pharmacy, Osaka University Hospital, Osaka, Japan
| | - Kenichiro Miura
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Junya Matsumoto
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Atsunobu Murata
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Kazuyoshi Ogasawara
- Center for Postgraduate Clinical Training and Career Development, Nagoya University Hospital, Aichi, Japan
| | - Hisashi Yamada
- Department of Neuropsychiatry, Hyogo College of Medicine, Hyogo, Japan
| | - Hikaru Hori
- Department of Psychiatry, School of Medicine, University of Occupational and Environmental Health, Fukuoka, Japan
| | - Kayo Ichihashi
- Deaprtment of Neuropsychiatry, University of Tokyo Hospital, Tokyo, Japan
| | - Naoki Hashimoto
- Department of Psychiatry, Hokkaido University Graduate School of Medicine, Hokkaido, Japan
| | - Kazutaka Ohi
- Department of Psychiatry and Psychotherapy, Gifu University Graduate School of Medicine, Gifu, Japan
| | - Norio Yasui-Furukori
- Department of Psychiatry, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Takashi Tsuboi
- Department of Neuropsychiatry, Kyorin University School of Medicine, Tokyo, Japan
| | - Toshinori Nakamura
- Department of Psychiatry, Shinshu University School of Medicine, Nagano, Japan
| | - Masahide Usami
- Department of Child and Adolescent Psychiatry, Kohnodai Hospital, National Center for Global Health and Medicine, Chiba, Japan
| | - Ryuji Furihata
- Department of Psychiatry, Nihon University School of Medicine, Tokyo, Japan
| | - Yoshikazu Takaesu
- Department of Neuropsychiatry, Kyorin University School of Medicine, Tokyo, Japan
| | - Kunihiro Iwamoto
- Department of Psychiatry, Nagoya University Graduate School of Medicine, Aichi, Japan
| | - Nobuhiro Sugiyama
- Department of Applied Occupational Therapy, Shinshu University School of Health Sciences, Nagano, Japan
| | - Taishiro Kishimoto
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - Naohisa Tsujino
- Department of Neuropsychiatry, School of Medicine, Faculty of Medicine, Toho University, Tokyo, Japan
| | - Hiroki Yamada
- Department of Psychiatry, Showa University Northern Yokohama Hospital, Kanagawa, Japan
| | - Akitoyo Hishimoto
- Department of Psychiatry, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
| | - Kiyotaka Nemoto
- Department of Psychiatry, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Kiyokazu Atake
- Department of Psychiatry, School of Medicine, University of Occupational and Environmental Health, Fukuoka, Japan
| | - Hiroyuki Muraoka
- Department of Psychiatry, Tokyo Women's Medical University, Tokyo, Japan
| | | | - Satoru Oishi
- Department of Psychiatry, Kitasato University School of Medicine, Kanagawa, Japan
| | | | - Fumiaki Ito
- Department of Psychiatry, Tohoku University Hospital, Miyagi, Japan
| | - Yayoi Imamura
- Department of Neuropsychiatry, Kyorin University School of Medicine, Tokyo, Japan
| | - Mikio Kido
- Department of Neuropsychiatry, University of Toyama Graduate School of Medicine and Pharmaceutical Sciences, Toyama, Japan
| | - Tatsuya Nagasawa
- Department of Neuropsychiatry, Kanazawa Medical University, Ishikawa, Japan
| | - Shusuke Numata
- Department of Psychiatry, Institute of Biomedical Science, Tokushima University Graduate School, Tokushima, Japan
| | - Shinichiro Ochi
- Department of Neuropsychiatry, Molecules and Function, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Masaaki Iwata
- Department of Neuropsychiatry, Faculty of Medicine, Tottori University, Tottori, Japan
| | - Hidenaga Yamamori
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Junichi Fujita
- Department of Psychiatry, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
| | - Toshiaki Onitsuka
- Department of Neuropsychiatry, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | | | - Manabu Makinodan
- Department of Psychiatry, Nara Medical University School of Medicine, Nara, Japan
| | - Michiko Fujimoto
- Department of Psychiatry, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yoichiro Takayanagi
- Department of Neuropsychiatry, University of Toyama School of Medicine, Toyama, Japan
| | - Kenji Takezawa
- Medical Corporation Matsuzaki Hospital, Toyohashi Mental Care Center, Aichi, Japan
| | - Hiroshi Komatsu
- Department of Psychiatry, Tohoku University Hospital, Miyagi, Japan
| | - Kentaro Fukumoto
- Department of Neuropsychiatry, Iwate Medical University, Iwate, Japan
| | - Shinichiro Tamai
- Department of Neuropsychiatry, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan
| | - Hirotaka Yamagata
- Division of Neuropsychiatry, Department of Neuroscience, Yamaguchi University School of Medicine, Yamaguchi, Japan
| | - Chika Kubota
- Department of Psychiatry, National Center Hospital, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Tadasu Horai
- Department of Psychiatry, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Ken Inada
- Department of Psychiatry, Tokyo Women's Medical University, Tokyo, Japan
| | - Koichiro Watanabe
- Department of Neuropsychiatry, Kyorin University School of Medicine, Tokyo, Japan
| | - Hiroaki Kawasaki
- Department of Psychiatry, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Ryota Hashimoto
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
| |
Collapse
|
4
|
Takaesu Y, Watanabe K, Numata S, Iwata M, Kudo N, Oishi S, Takizawa T, Nemoto K, Yasuda Y, Tagata H, Tsuboi T, Tsujino N, Hashimoto N, Matsui Y, Hori H, Yamamori H, Sugiyama N, Suwa T, Kishimoto T, Hishimoto A, Usami M, Furihata R, Iwamoto K, Fujishiro H, Nakamura T, Mizuno K, Inagaki T, Katsumoto E, Tomita H, Ohi K, Muraoka H, Atake K, Iida H, Nagasawa T, Fujita J, Yamamura S, Onitsuka T, Murata A, Takayanagi Y, Noda H, Matsumura Y, Takezawa K, Iga J, Ichihashi K, Ogasawara K, Yamada H, Inada K, Hashimoto R. Improvement of psychiatrists' clinical knowledge of the treatment guidelines for schizophrenia and major depressive disorders using the 'Effectiveness of Guidelines for Dissemination and Education in Psychiatric Treatment (EGUIDE)' project: A nationwide dissemination, education, and evaluation study. Psychiatry Clin Neurosci 2019; 73:642-648. [PMID: 31437336 PMCID: PMC6852015 DOI: 10.1111/pcn.12911] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 06/18/2019] [Accepted: 06/27/2019] [Indexed: 02/03/2023]
Abstract
AIM Although treatment guidelines for pharmacological therapy for schizophrenia and major depressive disorder have been issued by the Japanese Societies of Neuropsychopharmacology and Mood Disorders, these guidelines have not been well applied by psychiatrists throughout the nation. To address this issue, we developed the 'Effectiveness of Guidelines for Dissemination and Education in Psychiatric Treatment (EGUIDE)' integrated education programs for psychiatrists to disseminate the clinical guidelines. Additionally, we conducted a systematic efficacy evaluation of the programs. METHODS Four hundred thirteen out of 461 psychiatrists attended two 1-day educational programs based on the treatment guidelines for schizophrenia and major depressive disorder from October 2016 to March 2018. We measured the participants' clinical knowledge of the treatment guidelines using self-completed questionnaires administered before and after the program to assess the effectiveness of the programs for improving knowledge. We also examined the relation between the participants' demographics and their clinical knowledge scores. RESULTS The clinical knowledge scores for both guidelines were significantly improved after the program. There was no correlation between clinical knowledge and participant demographics for the program on schizophrenia; however, a weak positive correlation was found between clinical knowledge and the years of professional experience for the program on major depressive disorder. CONCLUSION Our results provide evidence that educational programs on the clinical practices recommended in guidelines for schizophrenia and major depressive disorder might effectively improve participants' clinical knowledge of the guidelines. These data are encouraging to facilitate the standardization of clinical practices for psychiatric disorders.
Collapse
Affiliation(s)
- Yoshikazu Takaesu
- Department of Neuropsychiatry, School of MedicineKyorin UniversityTokyoJapan
| | - Koichiro Watanabe
- Department of Neuropsychiatry, School of MedicineKyorin UniversityTokyoJapan
| | - Shusuke Numata
- Department of Psychiatry, Institute of Biomedical ScienceTokushima University Graduate SchoolTokushimaJapan
| | - Masaaki Iwata
- Division of Neuropsychiatry, Department of Brain and Neurosciences, Faculty of MedicineTottori UniversityTottoriJapan
| | - Noriko Kudo
- Department of Pathology of Mental Diseases, National Institute of Mental HealthNational Center of Neurology and PsychiatryTokyoJapan
| | - Satoru Oishi
- Department of PsychiatryKitasato University School of MedicineKanagawaJapan
| | - Takeya Takizawa
- Department of PsychiatryKitasato University School of MedicineKanagawaJapan
| | - Kiyotaka Nemoto
- Department of Psychiatry, Faculty of MedicineUniversity of TsukubaIbarakiJapan
| | - Yuka Yasuda
- Department of Pathology of Mental Diseases, National Institute of Mental HealthNational Center of Neurology and PsychiatryTokyoJapan
- Life Grow Brilliant Mental ClinicMedical Corporation FosterOsakaJapan
| | - Hiromi Tagata
- Department of NeuropsychiatryToho University School of MedicineTokyoJapan
| | - Takashi Tsuboi
- Department of Neuropsychiatry, School of MedicineKyorin UniversityTokyoJapan
| | - Naohisa Tsujino
- Department of PsychiatrySaiseikai Yokohamashi Tobu HospitalKanagawaJapan
| | - Naoki Hashimoto
- Department of PsychiatryHokkaido University Graduate School of MedicineHokkaidoJapan
| | - Yuki Matsui
- Department of Pathology of Mental Diseases, National Institute of Mental HealthNational Center of Neurology and PsychiatryTokyoJapan
- Department of PsychiatryJindai HospitalAichiJapan
| | - Hikaru Hori
- Department of Psychiatry, School of MedicineUniversity of Occupational and Environmental HealthFukuokaJapan
| | - Hidenaga Yamamori
- Department of Pathology of Mental Diseases, National Institute of Mental HealthNational Center of Neurology and PsychiatryTokyoJapan
- Japan Community Health Care Organization Osaka HospitalOsakaJapan
| | - Nobuhiro Sugiyama
- Department of Applied Occupational TherapyShinshu University School of Health SciencesNaganoJapan
- Department of PsychiatryShinshu University School of MedicineNaganoJapan
| | - Taro Suwa
- Department of Psychiatry, Graduate School of MedicineKyoto UniversityKyotoJapan
| | - Taishiro Kishimoto
- Keio University School of MedicineDepartment of NeuropsychiatryTokyoJapan
| | - Akitoyo Hishimoto
- Department of PsychiatryKobe University Graduate School of MedicineHyogoJapan
| | - Masahide Usami
- Department of Child and Adolescent Psychiatry, Kohnodai HospitalNational Center for Global Health and MedicineChibaJapan
| | - Ryuji Furihata
- Department of PsychiatryNihon University School of MedicineTokyoJapan
| | - Kunihiro Iwamoto
- Department of PsychiatryNagoya University Graduate School of MedicineAichiJapan
| | - Hiroshige Fujishiro
- Department of PsychiatryNagoya University Graduate School of MedicineAichiJapan
- Department of PsychiatryKawasaki Memorial HospitalKanagawaJapan
| | - Toshinori Nakamura
- Department of PsychiatryShinshu University School of MedicineNaganoJapan
| | | | - Takahiko Inagaki
- Biwako HospitalShigaJapan
- Department of PsychiatryShiga University of Medical ScienceShigaJapan
| | | | - Hiroaki Tomita
- Department of Psychiatry, Graduate School of MedicineTohoku UniversityMiyagiJapan
| | - Kazutaka Ohi
- Department of NeuropsychiatryKanazawa Medical UniversityIshikawaJapan
| | - Hiroyuki Muraoka
- Department of PsychiatryTokyo Women's Medical UniversityTokyoJapan
| | - Kiyokazu Atake
- Department of Psychiatry, School of MedicineUniversity of Occupational and Environmental HealthFukuokaJapan
| | - Hitoshi Iida
- Department of Psychiatry, Faculty of MedicineFukuoka UniversityFukuokaJapan
| | - Tatsuya Nagasawa
- Department of NeuropsychiatryKanazawa Medical UniversityIshikawaJapan
| | - Junichi Fujita
- Department of Child PsychiatryYokohama City University HospitalKanagawaJapan
| | | | - Toshiaki Onitsuka
- Department of Neuropsychiatry, Graduate School of Medical SciencesKyushu UniversityFukuokaJapan
| | | | - Yoichiro Takayanagi
- Department of NeuropsychiatryUniversity of Toyama Graduate School of Medicine and Pharmaceutical SciencesToyamaJapan
| | - Hokuto Noda
- Yamanashi Prefectural Kita HospitalYamanashiJapan
| | - Yukiko Matsumura
- Department of Neuropsychiatry, Faculty of Medical SciencesUniversity of FukuiFukuiJapan
| | - Kenji Takezawa
- Medical Corporation Matsuzaki HospitalToyohashi Mental Care CenterAichiJapan
| | - Jun‐ichi Iga
- Department of Neuropsychiatry, Molecules and FunctionEhime University Graduate School of MedicineEhimeJapan
| | - Kayo Ichihashi
- Department of NeuropsychiatryUniversity of Tokyo HospitalTokyoJapan
| | - Kazuyoshi Ogasawara
- Department of PsychiatryNagoya University Graduate School of MedicineAichiJapan
- Medical Research and Clinical Ethics Promotion OfficeNagoya University HospitalAichiJapan
| | - Hisashi Yamada
- Department of Pathology of Mental Diseases, National Institute of Mental HealthNational Center of Neurology and PsychiatryTokyoJapan
- Department of NeuropsychiatryHyogo College of MedicineHyogoJapan
| | - Ken Inada
- Department of PsychiatryTokyo Women's Medical UniversityTokyoJapan
| | - Ryota Hashimoto
- Department of Pathology of Mental Diseases, National Institute of Mental HealthNational Center of Neurology and PsychiatryTokyoJapan
- Department of PsychiatryOsaka University Graduate School of MedicineOsakaJapan
| |
Collapse
|
5
|
Tomita Y, Sueta D, Kakiuchi Y, Saeki S, Saruwatari K, Sakata S, Jodai T, Migiyama Y, Akaike K, Hirosako S, Fujisue K, Yamamura S, Miyazaki S, Takashio S, Izumiya Y, Nakamura K, Tsujita K, Ichiyasu H, Fujii K. Acute coronary syndrome as a possible immune-related adverse event in a lung cancer patient achieving a complete response to anti-PD-1 immune checkpoint antibody. Ann Oncol 2017; 28:2893-2895. [PMID: 28651328 DOI: 10.1093/annonc/mdx326] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Affiliation(s)
- Y Tomita
- Department of Respiratory Medicine.
| | - D Sueta
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | | | - S Saeki
- Department of Respiratory Medicine
| | | | - S Sakata
- Department of Respiratory Medicine
| | - T Jodai
- Department of Respiratory Medicine
| | | | - K Akaike
- Department of Respiratory Medicine
| | | | - K Fujisue
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - S Yamamura
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - S Miyazaki
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - S Takashio
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Y Izumiya
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | | | - K Tsujita
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | | | - K Fujii
- Department of Respiratory Medicine
| |
Collapse
|
6
|
Bucay N, Sekhon K, Yang T, Majid S, Shahryari V, Hsieh C, Mitsui Y, Deng G, Tabatabai ZL, Yamamura S, Calin GA, Dahiya R, Tanaka Y, Saini S. MicroRNA-383 located in frequently deleted chromosomal locus 8p22 regulates CD44 in prostate cancer. Oncogene 2016; 36:2667-2679. [PMID: 27893706 PMCID: PMC5426972 DOI: 10.1038/onc.2016.419] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 08/30/2016] [Accepted: 09/30/2016] [Indexed: 12/13/2022]
Abstract
A major genomic alteration in prostate cancer (PCa) is frequent loss of chromosome (chr) 8p with a common region of loss of heterozygosity (LOH) at chr8p22 locus. Genomic studies implicate this locus in the initiation of clinically significant PCa and with progression to metastatic disease. However, the genes within this region have not been fully characterized to date. Here we demonstrate for the first time that a microRNA component of this region –miR-383- is frequently downregulated in prostate cancer, plays a critical role in determining tumor initiating potential and is involved in prostate cancer metastasis via direct regulation of CD44, a ubiquitous marker of PCa tumor initiating cells (TICs)/ stem cells. Expression analyses of miR-383 in PCa clinical tissues established that low miR-383 expression is associated with poor prognosis. Functional data suggests that miR-383 regulates PCa tumor initiating/ stem-like cells via CD44 regulation. Ectopic expression of miR-383 inhibited tumor initiating capacity of CD44+ PCa cells. Also, ‘anti-metastatic’ effects of ectopic miR-383 expression were observed in a PCa experimental metastasis model. In view of our results, we propose that frequent loss of miR-383 at chr8p22 region leads to tumor initiation and prostate cancer metastasis. Thus, we have identified a novel finding that associates a long observed genomic alteration to PCa stemness and metastasis. Our data suggests that restoration of miR-383 expression may be an effective therapeutic modality against PCa. Importantly, we identified miR-383 as a novel PCa tissue diagnostic biomarker with a potential that outperforms that of serum PSA.
Collapse
Affiliation(s)
- N Bucay
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - K Sekhon
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - T Yang
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - S Majid
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - V Shahryari
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - C Hsieh
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - Y Mitsui
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - G Deng
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - Z L Tabatabai
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - S Yamamura
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - G A Calin
- Department of Experimental Therapeutics, Non-Coding RNA Center, MD Anderson Cancer Center, University of Texas, Houston, TX, USA
| | - R Dahiya
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - Y Tanaka
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - S Saini
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| |
Collapse
|
7
|
Kawai M, Kirkness JP, Yamamura S, Imaizumi K, Yoshimine H, Oi K, Ayuse T. Increased phosphatidylcholine concentration in saliva reduces surface tension and improves airway patency in obstructive sleep apnoea. J Oral Rehabil 2013; 40:758-66. [DOI: 10.1111/joor.12094] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/04/2013] [Indexed: 11/27/2022]
Affiliation(s)
- M. Kawai
- Department of Clinical Physiology; Nagasaki University Graduate School of Biomedical Science; Nagasaki Japan
| | - J. P. Kirkness
- Division of Pulmonary and Critical Care Medicine; The Johns Hopkins School of Medicine; Johns Hopkins Sleep Disorders Center; Baltimore MD USA
| | | | | | - H. Yoshimine
- Department of Internal Medicine; Inoue Hospital; Nagasaki Japan
| | - K. Oi
- Department of Clinical Physiology; Nagasaki University Graduate School of Biomedical Science; Nagasaki Japan
| | - T. Ayuse
- Department of Clinical Physiology; Nagasaki University Graduate School of Biomedical Science; Nagasaki Japan
| |
Collapse
|
8
|
Yamamura S, Hoshikawa M, Dai K, Saito H, Suzuki N, Niwa O, Okada M. ONO-2506 inhibits spike-wave discharges in a genetic animal model without affecting traditional convulsive tests via gliotransmission regulation. Br J Pharmacol 2013; 168:1088-100. [PMID: 22882023 DOI: 10.1111/j.1476-5381.2012.02132.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Revised: 07/18/2012] [Accepted: 07/23/2012] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND AND PURPOSE Anticonvulsants have been developed according to the traditional neurotransmission imbalance hypothesis. However, the anticonvulsive pharmacotherapy currently available remains unsatisfactory. To develop new antiepileptic drugs with novel antiepileptic mechanisms, we have tested the antiepileptic actions of ONO-2506, a glial modulating agent, and its effects on tripartite synaptic transmission. EXPERIMENTAL APPROACH Dose-dependent effects of ONO-2506 on maximal-electroshock seizure (MES), pentylenetetrazol-induced seizure (PTZ) and epileptic discharge were determined in a genetic model of absence epilepsy in mice (Cacna1a(tm2Nobs/tm2Nobs) strain). Antiepileptic mechanisms of ONO-2506 were analysed by examining the interaction between ONO-2506 and transmission-modulating toxins (tetanus toxin, fluorocitrate, tetrodotoxin) on release of l-glutamate, d-serine, GABA and kynurenic acid in the medial-prefrontal cortex (mPFC) of freely moving rats using microdialysis and primary cultured rat astrocytes. KEY RESULTS ONO-2506 inhibited spontaneous epileptic discharges in Cacna1a(tm2Nobs/tm2Nobs) mice without affecting MES or PTZ. Given systemically, ONO-2506 increased basal release of GABA and kynurenic acid in the mPFC through activation of both neuronal and glial exocytosis, but inhibited depolarization-induced releases of all transmitters. ONO-2506 increased basal glial release of kynurenic acid without affecting those of l-glutamate, d-serine or GABA. However, ONO-2506 inhibited AMPA-induced releases of l-glutamate, d-serine, GABA and kynurenic acid. CONCLUSIONS AND IMPLICATIONS ONO-2506 did not affect traditional convulsive tests but markedly inhibited epileptic phenomena in the genetic epilepsy mouse model. ONO-2506 enhanced release of inhibitory neuro- and gliotransmitters during the resting stage and inhibited tripartite transmission during the hyperactive stage. The results suggest that ONO-2506 is a novel potential glial-targeting antiepileptic drug. LINKED ARTICLE This article is commented on by Onat, pp. 1086-1087 of this issue. To view this commentary visit http://dx.doi.org/10.1111/bph.12050.
Collapse
Affiliation(s)
- Satoshi Yamamura
- Department of Psychiatry, Division of Neuroscience, Graduate School of Medicine, Mie University, Tsu, Japan
| | | | | | | | | | | | | |
Collapse
|
9
|
Kakehashi R, Tokai N, Kohno T, Nakatsuji Y, Yamamura S, Karlsson G. Protonation behavior and solution properties of amine oxide surfactants containing a pyridyl group. J Oleo Sci 2013; 62:123-32. [PMID: 23470439 DOI: 10.5650/jos.62.123] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Hydrogen bonding between surfactant molecules plays an important role in self-assembly formation. For long alkyl chain amine oxide surfactants, the specific protonation degree dependence of some solution properties has been considered to be due to hydrogen bonding between protonated and deprotonated species. In addition to this type of hydrogen bonding, we introduced a pyridyl group into an alkylamine oxide molecule as a new hydrogen-bonding site. The pyridyl group has three different structural isomers based on the position of the substituent. An amine oxide group in pyridylamine oxides was preferentially protonated. In addition, protonation of the pyridyl group revealed a pronounced substituent position effect on the critical micelle concentration, micellar size, and solubilization of oil-soluble dye into micelles. The intermolecular or intramolecular hydrogen bond formation could be controlled by altering the substituent position.
Collapse
Affiliation(s)
- R Kakehashi
- Organic Materials Research Division, Osaka Municipal Technical Research Institute, 1-6-50 Morinomiya, Joto-ku, Osaka 836-8553, Japan.
| | | | | | | | | | | |
Collapse
|
10
|
Nakagawa M, Yamamura S, Motomura E, Shiroyama T, Tanii H, Okada M. Combination therapy of zonisamide with aripiprazole on ECT- and benzodiazepine-resistant periodic catatonia. J Neuropsychiatry Clin Neurosci 2013; 24:E9. [PMID: 23037658 DOI: 10.1176/appi.neuropsych.11080191] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
11
|
Itatani R, Oda S, Utsunomiya D, Funama Y, Honda K, Katahira K, Morishita S, Yamamura S, Namimoto T, Yamashita Y. Reduction in radiation and contrast medium dose via optimization of low-kilovoltage CT protocols using a hybrid iterative reconstruction algorithm at 256-slice body CT: phantom study and clinical correlation. Clin Radiol 2012; 68:e128-35. [PMID: 23245269 DOI: 10.1016/j.crad.2012.10.014] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Revised: 10/15/2012] [Accepted: 10/26/2012] [Indexed: 12/19/2022]
Abstract
AIM To optimize low-kilovoltage (kV) computed tomography (CT) protocols using a hybrid iterative reconstruction (HIR) algorithm at 256-detector-row body CT. MATERIALS AND METHODS Based on preliminary phantom studies, three different tube voltage protocols with an equal contrast-to-noise ratio (CNR) were developed. They were a conventional 120 kV protocol with filtered back-projection (FBP), an 80 kV protocol with HIR (a 160% increase in the tube current-time product and a 40% reduction in the contrast medium dose), and a 100 kV protocol with HIR (a 20% reduction in the tube current-time product and the contrast medium dose). The clinical study included 70 patients (34 women, 36 men; mean age 70.5 ± 9.1 years, range 44-92 years) who had undergone CT at 120 kV a mean of 148 ± 137 days before undergoing low kV contrast-enhanced body CT (80 kV with HIR, n = 35; 100 kV with HIR, n = 35). The estimated effective radiation dose (ED), image noise, and CNR were calculated and the visual image quality was scored on a four-point scale. RESULTS Mean ED was 12.3, 8.4, and 15.4 mSv for the 80, 100, and 120 kV protocol, respectively, and significantly lower using the low kV protocols. There was no significant difference in the image noise and CNR between the low kV protocols with HIR and the 120 kV protocol with FBP, or in the visual scores among the three protocols. CONCLUSION Without ensuing image-quality degradation, the radiation and contrast medium dose can be reduced with optimal contrast-enhanced CT protocols using a low kV technique and an HIR algorithm.
Collapse
Affiliation(s)
- R Itatani
- Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Tanahashi S, Yamamura S, Nakagawa M, Motomura E, Okada M. Clozapine, but not haloperidol, enhances glial D-serine and L-glutamate release in rat frontal cortex and primary cultured astrocytes. Br J Pharmacol 2012; 165:1543-55. [PMID: 21880034 DOI: 10.1111/j.1476-5381.2011.01638.x] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND AND PURPOSE Deficient transmission at the glutamate NMDA receptor is considered a key component of the pathophysiology of schizophrenia. However, the effects of antipsychotic drugs on the release of the endogenous NMDA receptor partial agonist, D-serine, remain to be clarified. EXPERIMENTAL APPROACH We determined the interaction between antipsychotic drugs (clozapine and haloperidol) and transmission-modulating toxins (tetanus toxin, fluorocitrate, tetrodotoxin) on the release of L-glutamate and D-serine in the medial prefrontal cortex (mPFC) of freely moving rats, using microdialysis, and primary cultures of astrocytes using extreme high-pressure liquid chromatography. KEY RESULTS Release of L-glutamate and D-serine in the mPFC and in cultured astrocytes was inhibited by tetanus toxin (a synaptobrevin inhibitor) and fluorocitrate (a glial toxin), whereas tetrodotoxin (a voltage-sensitive Na(+) blocker) inhibited depolarization-induced L-glutamate release in the mPFC without affecting that of D-serine. Clozapine (1 and 5 mg·kg(-1)), but not haloperidol (0.5 and 1 mg·kg(-1)), dose-dependently increased L-glutamate and D-serine release from both astrocytes and mPFC. Clozapine-induced release of L-glutamate and D-serine was also reduced by tetanus toxin and fluorocitrate. Tetrodotoxin reduced clozapine-induced mPFC L-glutamate release but not that of D-serine. Clozapine-induced L-glutamate release preceded clozapine-induced D-serine release. MK-801 (a NMDA receptor antagonist) inhibited the delayed clozapine-induced L-glutamate release without affecting that of D-serine. CONCLUSIONS AND IMPLICATIONS Clozapine predominantly activated glial exocytosis of D-serine, and this clozapine-induced D-serine release subsequently enhances neuronal L-glutamate release via NMDA receptor activation. The enhanced D-serine associated glial transmission seems a novel mechanism of action of clozapine but not haloperidol.
Collapse
Affiliation(s)
- Shunske Tanahashi
- Department of Psychiatry, Division of Neuroscience, Graduate School of Medicine, Brain Science and Animal Model Research Center, Mie University, 2-174 Edobashi, Tsu, Mie, Japan
| | | | | | | | | |
Collapse
|
13
|
Fukuyama K, Tanahashi S, Nakagawa M, Yamamura S, Motomura E, Shiroyama T, Tanii H, Okada M. Levetiracetam inhibits neurotransmitter release associated with CICR. Neurosci Lett 2012; 518:69-74. [DOI: 10.1016/j.neulet.2012.03.056] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 03/19/2012] [Accepted: 03/20/2012] [Indexed: 11/27/2022]
|
14
|
Tanahashi S, Ueda Y, Nakajima A, Yamamura S, Nagase H, Okada M. Novel δ1-receptor agonist KNT-127 increases the release of dopamine and L-glutamate in the striatum, nucleus accumbens and median pre-frontal cortex. Neuropharmacology 2012; 62:2057-67. [PMID: 22266218 DOI: 10.1016/j.neuropharm.2012.01.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Revised: 01/02/2012] [Accepted: 01/09/2012] [Indexed: 11/29/2022]
Abstract
The effects of systemic δ1-agonist on neurotransmission remains obscure, since no selective δ1-agonist exists that can penetrate the blood-brain barrier. Recently, we succeeded in synthesizing a putative δ1-receptor agonist, KNT-127, which has been demonstrated the effectiveness of systemic administration against anxiety and depressive-like behavior. To clarify the functional selectivity of KNT-127 and neurotransmission regulating system of δ1-receptor, the present study investigated the interaction between KNT-127 and δ-receptor antagonists on the release of dopamine, L-glutamate and GABA in nucleus accumbens (NAc), striatum and median pre-frontal cortex (mPFC) using multi-probe microdialysis. Intraperitoneal administration of KNT-127 increased the release of dopamine and L-glutamate in three regions, but decreased and increased GABA releases in respective NAc and mPFC without affecting that in striatum. The effects of KNT-127 in the three regions were abrogated by δ1-antagonist but not by δ2-antagonist. MK801 inhibited KNT-127-induced dopamine release in striatum and NAc, but enhanced that in mPFC, inhibited KNT-127-induced mPFC GABA release without affecting KNT-127-induced GABA reduction in NAc. Muscimol enhanced KNT-127-induced dopamine release in mPFC. Sulpiride inhibited KNT-127-induced reduction of GABA release in NAc. The results indicated that KNT-127 is a selective δ1-agonist, and suggested that δ1-receptor directly activates the release of dopamine and L-glutamate in the striatum, NAc and mPFC, but not that of GABA in the three regions. δ1-receptor indirectly inhibited GABA release in NAc via activated dopaminergic transmission, while δ1-receptor indirectly enhanced GABA release in mPFC via activated glutamatergic transmission.
Collapse
Affiliation(s)
- Shunsuke Tanahashi
- Department of Psychiatry, Division of Neuroscience, Graduate School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | | | | | | | | | | |
Collapse
|
15
|
To M, Yamamura S, Akashi K, Charron CE, Haruki K, Barnes PJ, Ito K. Defect of adaptation to hypoxia in patients with COPD due to reduction of histone deacetylase 7. Chest 2011; 141:1233-1242. [PMID: 22172637 PMCID: PMC3342783 DOI: 10.1378/chest.11-1536] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND Hypoxia inducible factor (HIF)-1 plays an important role in cellular adaptation to hypoxia by activating oxygen-regulated genes such as vascular endothelial growth factor (VEGF) and erythropoietin. Sputum VEGF levels are reported to be decreased in COPD, despite hypoxia. Here we show that patients with COPD fail to induce HIF-1α and VEGF under hypoxic condition because of a reduction in histone deacetylase (HDAC) 7. METHODS Peripheral blood mononuclear cells (PBMCs) were obtained from patients with moderate to severe COPD (n = 21), smokers without COPD (n = 12), and nonsmokers (n = 15). PBMCs were exposed to hypoxia (1% oxygen, 5% CO(2), and 94% N(2)) for 24 h, and HIF-1α and HDAC7 protein expression in nuclear extracts were determined by sodium dodecyl sulfate poly acrylamide gel electrophoresis (SDS-PAGE)/Western blotting. RESULTS HIF-1α was significantly induced by hypoxia in each group when compared with the normoxic condition (12-fold induction in nonsmokers, 24-fold induction in smokers without COPD, fourfold induction in COPD), but induction of HIF-1α under hypoxia was significantly lower in patients with COPD than in nonsmokers and smokers without COPD (P < .05 and P < .01, respectively). VEGF messenger RNA detected by quantitative real-time polymerase chain reaction was correlated with HIF-1α protein in nuclei (r = 0.79, P < .05), and HDAC7 protein expression was correlated with HIF-1α protein in nuclei (r = 0.46, P < .05). HDAC7 knockdown inhibited hypoxia-induced HIF-1α activity in U937 cells, and HIF-1α nuclear translocation and HIF-1α binding to the VEGF promoter in A549 cells. CONCLUSIONS HDAC7 reduction in COPD causes a defect of HIF-1α induction response to hypoxia with impaired VEGF gene expression. This poor cellular adaptation might play a role in the pathogenesis of COPD.
Collapse
Affiliation(s)
- Masako To
- Airway Disease Section, National Heart and Lung Institute, Imperial College, London, England; Department of Laboratory Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya-City, Saitama, Japan
| | - Satoshi Yamamura
- Airway Disease Section, National Heart and Lung Institute, Imperial College, London, England
| | - Kenichi Akashi
- Airway Disease Section, National Heart and Lung Institute, Imperial College, London, England
| | - Catherine E Charron
- Airway Disease Section, National Heart and Lung Institute, Imperial College, London, England
| | - Kosuke Haruki
- Department of Laboratory Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya-City, Saitama, Japan
| | - Peter J Barnes
- Airway Disease Section, National Heart and Lung Institute, Imperial College, London, England
| | - Kazuhiro Ito
- Airway Disease Section, National Heart and Lung Institute, Imperial College, London, England.
| |
Collapse
|
16
|
Tanahashi S, Yamamura S, Nakagawa M, Motomura E, Okada M. Dopamine D2 and serotonin 5-HT1A receptors mediate the actions of aripiprazole in mesocortical and mesoaccumbens transmission. Neuropharmacology 2011; 62:765-74. [PMID: 21925189 DOI: 10.1016/j.neuropharm.2011.08.031] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 07/29/2011] [Accepted: 08/22/2011] [Indexed: 12/01/2022]
Abstract
The antipsychotic agent aripiprazole acts as a partial agonist of dopamine D2 and serotonin 5-HT1A receptors. However, the detailed actions of aripiprazole in mesolimbic and mesocortical transmission remain to be clarified. To address this, we examined the effects of systemic and local administrations of aripiprazole on extracellular levels of dopamine and GABA in medial prefrontal cortex (mPFC), nucleus accumbens (NAc), and anterior (aVTA) and posterior (pVTA) ventral tegmental areas. Intraperitoneal injection of aripiprazole (0.5mg/kg) increased dopamine release in mPFC without affecting those in aVTA, pVTA, or NAc, whereas 10mg/kg decreased the release in all four regions. Local sulpiride administration in aVTA increased concentration-dependently dopamine release in both aVTA and NAc without affecting that in mPFC, whereas local aripiprazole administration in aVTA concentration-dependently decreased dopamine release in aVTA and mPFC without affecting that in NAc. Blockade of 5-HT1A receptor in aVTA produced aripiprazole-induced dopamine release in aVTA and prevented the aripiprazole-induced reduction of dopamine release in mPFC. Local administration of aripiprazole in mPFC increased dopamine and decreased GABA releases, whereas local administration of sulpiride had no effect on dopamine or GABA. In mPFC, blockade of 5-HT1A receptor prevented the aripiprazole-induced dopamine elevation and GABA reduction; however, under the activation of GABA(A) receptor, local perfusion with aripiprazole in mPFC decreased GABA release without affecting dopamine release. The results suggested that the combination of 5-HT1A and D2 partial agonistic actions of aripiprazole against mesocortical and mesoaccumbens transmission, explains, at least in part, the atypical antipsychotic properties of aripiprazole. This article is part of a Special Issue entitled 'Post-Traumatic Stress Disorder'.
Collapse
Affiliation(s)
- Shunsuke Tanahashi
- Department of Psychiatry, Graduate School of Medicine, Mie University Brain Science and Animal Model Center (BSAM), Mie University, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | | | | | | | | |
Collapse
|
17
|
Sugawara Y, Ootaki M, Yamamura S, Endo S, Nakasako M. Humidity-induced phase transition of xylose isomerase. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311086764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
18
|
Miura K, Osaka K, Yamamura S, Sugawara Y. Noble humidity control system for in situX-ray powder diffraction at SPring-8. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311094001] [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: 11/11/2022] Open
|
19
|
Yamamura S, Sugawara Y. Freezing of disordered hydrogen-bonding networks observed in nucleotide hydrates. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311080822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
20
|
Kiyotani T, Ida T, Yamamura S, Sugawara Y. Crystal structures and humidity-dependent phase transitions of Gly- L-Tyr hydrates. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311093196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
21
|
Ohoyama K, Yamamura S, Hamaguchi T, Nakagawa M, Motomura E, Shiroyama T, Tanii H, Okada M. Effect of novel atypical antipsychotic, blonanserin, on extracellular neurotransmitter level in rat prefrontal cortex. Eur J Pharmacol 2011; 653:47-57. [DOI: 10.1016/j.ejphar.2010.11.023] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2010] [Revised: 11/18/2010] [Accepted: 11/23/2010] [Indexed: 10/18/2022]
|
22
|
Yamamura S, Abe M, Nakagawa M, Ochi S, Ueno SI, Okada M. Different actions for acute and chronic administration of mirtazapine on serotonergic transmission associated with raphe nuclei and their innervation cortical regions. Neuropharmacology 2010; 60:550-60. [PMID: 21195096 DOI: 10.1016/j.neuropharm.2010.12.025] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Revised: 12/14/2010] [Accepted: 12/20/2010] [Indexed: 11/18/2022]
Abstract
The atypical antidepressant, mirtazapine enhances noradrenergic transmission, but its effects on serotonergic transmission remain to be clarified. The present study determined the effects of acute and chronic administration of mirtazapine on serotonergic transmissions in raphe nuclei and their innervation regions, frontal and entorhinal cortex, using multiple-probes microdialysis with real-time PCR and western blotting. Acute administration of mirtazapine did not affect extracellular serotonin level in raphe nuclei or cortex; however, chronic administration increased extracellular serotonin level in raphe nuclei without affecting that in cortex. Blockade of 5-HT1A receptor, but not that of the 5-HT2A/2C receptor, enhanced the effects of acute administration of mirtazapine on extracellular serotonin level in raphe nuclei. Chronic mirtazapine administration reduced the inhibitory function associated with somatodendritic 5-HT1A receptor in raphe nuclei, but enhanced postsynaptic 5-HT1A receptor in serotonergic innervated cortical regions. Chronic administration reduced the expression of mRNA and protein of serotonin transporter and 5-HT1A receptor in raphe nuclei, but not in the cortices. These results suggested that acute administration of mirtazapine probably activated serotonergic transmission, but its stimulatory action was abolished by activated inhibitory 5-HT1A receptor. Chronic administration of mirtazapine resulted in increased extracellular serotonin level via reduction of serotonin transporter with reduction of somatodendritic 5-HT1A autoreceptor function in raphe nuclei. These pharmacological actions of mirtazapine include its serotonergic profiles as noradrenergic and specific serotonergic antidepressant (NaSSA).
Collapse
Affiliation(s)
- Satoshi Yamamura
- Department of Psychiatry, Division of Neuroscience, Mie University, Graduate School of Medicine, Tsu, Mie, Japan
| | | | | | | | | | | |
Collapse
|
23
|
Yoshida S, Yamamura S, Ohoyama K, Nakagawa M, Motomura E, Kaneko S, Okada M. Effects of valproate on neurotransmission associated with ryanodine receptors. Neurosci Res 2010; 68:322-8. [PMID: 20832432 DOI: 10.1016/j.neures.2010.08.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Revised: 08/27/2010] [Accepted: 08/30/2010] [Indexed: 01/05/2023]
Abstract
To clarify the antiepileptic mechanisms of valproate (VPA), we determined the effects of acute and sub-acute administrations of VPA on ryanodine receptor (RyR)-associated hippocampal releases of GABA and glutamate using microdialysis, as well expression of mRNA and protein of RyR subtypes in the rat hippocampus. Acute administration of therapeutic-relevant VPA did not affect the hippocampal extracellular levels of GABA or glutamate, whereas sub-acute administration increased GABA level without affecting that of glutamate. Perfusion with ryanodine increased the hippocampal extracellular level of glutamate (ryanodine concentration range: 1-1000μM) concentration-dependently; however, that of GABA was increased by 1-100μM ryanodine concentration-dependently but the stimulatory effects of 1000μM ryanodine on GABA release was not observed. Both acute and sub-acute administrations of therapeutic-relevant VPA inhibited ryanodine-induced responses of hippocampal extracellular glutamate level without affecting that of GABA. Especially, both acute and sub-acute administrations of VPA prevented the breakdown of GABA release induced by 1000μM ryanodine. Sub-acute administration of therapeutically-relevant dose VPA weakly increased RyR mRNA expression but we could not detect the changes of RyR protein expression in rat hippocampus. These results suggest that VPA inhibited the neurotransmitter release associated with RyR without affecting the expression of RyR protein. Therefore, the antiepileptic action of VPA seems to be mediated, at least in part, by an increase in basal GABA release and inhibition of RyR-associated glutamate release.
Collapse
Affiliation(s)
- Shukuko Yoshida
- Department of Neuropsychiatry, Graduate School of Medicine, Hirosaki University, Hirosaki, Japan
| | | | | | | | | | | | | |
Collapse
|
24
|
Suzuki T, Kikuchi H, Yamamura S, Terada K, Yamamoto K. The change in characteristics of microcrystalline cellulose during wet granulation using a high-shear mixer. J Pharm Pharmacol 2010; 53:609-16. [PMID: 11370700 DOI: 10.1211/0022357011775938] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [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: 10/31/2022]
Abstract
Abstract
The objective of this study was to investigate the mechanism of hard granule formation and to demonstrate the applicability of X-ray diffraction methods for studying the polymeric pharmaceutical excipients. Using a high-shear mixer, microcrystalline cellulose (MCC) was granulated with water as the granulating liquid. The hardness of the MCC granules increased with granulation time and the amount of water added. The specific surface area measured by the N2 adsorption method was reduced during the process. Crystallite size of cellulose, calculated by Scherrer's equation adapted for wide angle X-ray diffraction method, decreased with granulation time and with increasing amounts of water added. Debye plots for X-ray small scattering patterns suggested that the average magnitude of the continuous solid region in MCC granules became significantly greater, whereas the specific surface area of the MCC granules, calculated from Debye plots, became smaller in comparison with that of intact MCC. These findings suggested that the long-chain structures in MCC were disrupted, resulting in smaller units with shorter chain lengths due to the strong shear force of the impeller. These smaller units then form a network within the granules. Thus, MCC granules are strengthened with longer granulation time and greater amounts of water, resulting in a more intricate network. The change in MCC chain length and physical structure can be experimentally detected using the small-angle X-ray scattering and wide-angle powder X-ray diffraction methods.
Collapse
Affiliation(s)
- T Suzuki
- Pharmaceutical Formulation Research Laboratory, Daiichi Pharmaceutical Co., Ltd., Tokyo, Japan.
| | | | | | | | | |
Collapse
|
25
|
Yamamura S, Ohoyama K, Hamaguchi T, Kashimoto K, Nakagawa M, Kanehara S, Suzuki D, Matsumoto T, Motomura E, Shiroyama T, Okada M. Effects of quetiapine on monoamine, GABA, and glutamate release in rat prefrontal cortex. Psychopharmacology (Berl) 2009; 206:243-58. [PMID: 19575183 DOI: 10.1007/s00213-009-1601-9] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2009] [Accepted: 06/22/2009] [Indexed: 01/10/2023]
Abstract
INTRODUCTION The atypical antipsychotic drug, quetiapine (QTP), is effective in schizophrenia and mood disorders, but induces seizures compared to typical antipsychotics. METHODS To explore the mechanisms of action of QTP, we determined its effects on extracellular levels of norepinephrine, dopamine, serotonin, gamma-aminobutyric acid (GABA), and glutamate in the medial prefrontal cortex (mPFC) using microdialysis, and neuronal firing in the ventral tegmental area (VTA), locus coeruleus (LC), dorsal raphe nucleus (DRN), and mediodorsal thalamic nucleus (MTN) by telemetry in freely moving rats. RESULTS QTP (10 and 30 mg/kg, i.p.) activated neuronal firing in the VTA, LC, and MTN without affecting that in the DRN. QTP increased extracellular levels of norepinephrine, dopamine, and glutamate without affecting serotonin or GABA levels in the mPFC. The stimulatory effects of QTP on norepinephrine and dopamine were mediated by positive alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA)/glutamatergic and negative GABA-mediated NMDA/glutamatergic regulation. DISCUSSION The dopaminergic terminal projecting from the VTA received inhibitory GABA-mediated NMDA/glutamatergic regulation, but not stimulatory AMPA/glutamatergic regulation. However, both dopaminergic and noradrenergic terminals from the LC received stimulatory AMPA/glutamatergic regulation from the MTN, but not inhibitory GABA-mediated NMDA/glutamatergic regulation. These findings correlating neuronal activities in nuclei with neurotransmitter release suggested that the effects of QTP on neurotransmission in the mPFC depend on activated neuronal projections located outside the mPFC. Furthermore, positive interaction between LC and MTN afferents are potentially important in the pharmacological mechanisms of neurotransmitter regulation by QTP and hint at mechanisms underlying the atypical profile of this drug for treatment of schizophrenia and as a mood stabilizer and proconvulsive agent.
Collapse
Affiliation(s)
- Satoshi Yamamura
- Department of Psychiatry, Division of Neuroscience, Graduate School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie, 514-8507, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Yamamura S, Ohoyama K, Nagase H, Okada M. Zonisamide enhances delta receptor-associated neurotransmitter release in striato-pallidal pathway. Neuropharmacology 2009; 57:322-31. [PMID: 19482038 DOI: 10.1016/j.neuropharm.2009.05.005] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2009] [Revised: 05/17/2009] [Accepted: 05/19/2009] [Indexed: 11/26/2022]
Abstract
A recent randomized control study demonstrated that zonisamide (ZNS), an antiepileptic drug, is effective in Parkinson's disease at the lower than the therapeutic doses against epilepsy (25-50 mg/day); however, the detailed mechanism of antiparkinsonian effects of ZNS remains to be clarified. To determine the mechanism of antiparkinsonian effect of ZNS, we investigated the effects of ZNS on extracellular levels of dopamine in the striatum (STR), glutamate in substantia nigra pars reticulata (SNr), GABA in globus pallidus (GP), subthalamic nucleus (STN) and SNr, using multiple microdialysis probes. Striatal perfusion of 1000 microM ZNS (within therapeutic-relevant concentration against epilepsy) increased extracellular levels of dopamine in STR, whereas 100 microM ZNS (lower than the therapeutic-relevant concentration against epilepsy but within the therapeutic rage against Parkinson's disease) did not affect it. Striatal perfusion of ZNS (100 and 1000 microM) decreased the extracellular levels of GABA in STN and glutamate in SNr, but decreased extracellular GABA level in GP without affecting GABA level in SNr. These concentration-dependent effects of ZNS on extracellular neurotransmitter levels were independent of dopamine and delta(2) receptors; however, blockade of delta(1) receptor inhibited the effects of ZNS. Furthermore, activation of delta(1) receptor enhanced the effects of ZNS on neurotransmitter level. These results suggest that ZNS does not affect the direct pathway but inhibits the indirect pathway, which is mediated by delta(1) receptor. Therefore, the antiparkinsonian effects of ZNS seem to be mediated through the interaction between lower than therapeutically-relevant concentration against epilepsy of ZNS (100 microM) and delta(1) receptor.
Collapse
Affiliation(s)
- S Yamamura
- Department of Psychiatry, Division of Neuroscience, Graduate School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | | | | | | |
Collapse
|
27
|
Osoata GO, Yamamura S, Ito M, Vuppusetty C, Adcock IM, Barnes PJ, Ito K. Nitration of distinct tyrosine residues causes inactivation of histone deacetylase 2. Biochem Biophys Res Commun 2009; 384:366-71. [PMID: 19410558 DOI: 10.1016/j.bbrc.2009.04.128] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2009] [Accepted: 04/28/2009] [Indexed: 02/07/2023]
Abstract
Histone deacetylases (HDACs) are key molecules involved in epigenetic regulation of gene expression. We have previously demonstrated that oxidative stress caused a reduction in HDAC2, resulting in amplified inflammation and reduced corticosteroid responsiveness. Here we showed nitrative/oxidative stress reduced HDAC2 expression via nitration of distinct tyrosine residues. Peroxynitrite, hydrogen peroxide and cigarette smoke-conditioned medium reduced HDAC2 expression in A549 epithelial cells in vitro. This reduction was due to increased proteasomal degradation following ubiquitination rather than reduction of mRNA expression or stability. HDAC2 was nitrated under nitrative/oxidative stress and in the peripheral lung tissues of smokers and patients with chronic obstructive pulmonary disease. Mutagenesis studies replacing tyrosine (Y) residues with alanine revealed that Y253 is at least partly responsible for the proteasomal degradation of HDAC2 under nitrative stress. Thus, nitration of distinct tyrosine residues modifies both the expression and activity of HDAC2, having an impact on epigenetic regulation.
Collapse
Affiliation(s)
- Grace O Osoata
- Airway Disease Section, National Heart and Lung Institute, Imperial College London, Dovehouse Street, London SW3 6LY, United Kingdom
| | | | | | | | | | | | | |
Collapse
|
28
|
Yamamura S, Ohoyama K, Hamaguchi T, Nakagawa M, Suzuki D, Matsumoto T, Motomura E, Tanii H, Shiroyama T, Okada M. Effects of zotepine on extracellular levels of monoamine, GABA and glutamate in rat prefrontal cortex. Br J Pharmacol 2009; 157:656-65. [PMID: 19371334 DOI: 10.1111/j.1476-5381.2009.00175.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND PURPOSE The atypical antipsychotic drug, zotepine, is effective in treatment of schizophrenia and acute mania, but the incidence of seizures during treatment is higher than with other antipsychotics. In addition, the mechanisms underlying the clinical actions of zotepine remain uncharacterized. EXPERIMENTAL APPROACH The effects of intraperitoneal administration of zotepine and haloperidol on the extracellular levels of noradrenaline, dopamine, 5-HT, GABA, and glutamate in the medial prefrontal cortex (mPFC) were compared. Neuronal activities induced by each drug in the ventral tegmental area (VTA), locus coeruleus (LC), dorsal raphe nucleus (DRN) and mediodorsal thalamic nucleus (MTN) were also analysed. KEY RESULTS Haloperidol did not affect extracellular neurotransmitter levels in the mPFC. In contrast, zotepine activated neuronal activities in all nuclei and increased the extracellular levels of noradrenaline, dopamine, GABA, and glutamate in the mPFC, but not 5-HT levels. The zotepine-stimulated neuronal activity in the VTA, LC, DRN and MTN enhanced the release of dopamine, noradrenaline, 5-HT, glutamate and GABA in the mPFC, although the enhanced GABAergic transmission possibly inhibited noradrenaline, dopamine and 5-HT release. The other afferent to mPFC, which releases dopamine and noradrenaline, was partially insensitive to GABAergic inhibition, but possibly received stimulatory AMPA/glutamatergic regulation from the MTN. CONCLUSIONS AND IMPLICATIONS Our results indicated that the positive interaction between prefrontal catecholaminergic transmission and AMPA/glutamatergic transmission from MTN might explain the regulatory effects of zotepine on neurotransmitter release. A mechanism is suggested to account for the pharmacological profile of this atypical antipsychotic and for its pro-convulsive action.
Collapse
Affiliation(s)
- S Yamamura
- Department of Psychiatry, Division of Neuroscience, Graduate School of Medicine, Mie University, Mie, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Yamamura S, Saito H, Suzuki N, Kashimoto S, Hamaguchi T, Ohoyama K, Suzuki D, Kanehara S, Nakagawa M, Shiroyama T, Okada M. Effects of zonisamide on neurotransmitter release associated with inositol triphosphate receptors. Neurosci Lett 2009; 454:91-6. [DOI: 10.1016/j.neulet.2009.02.065] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2008] [Revised: 02/13/2009] [Accepted: 02/26/2009] [Indexed: 10/21/2022]
|
30
|
Yamamura S, Hamaguchi T, Ohoyama K, Sugiura Y, Suzuki D, Kanehara S, Nakagawa M, Motomura E, Matsumoto T, Tanii H, Shiroyama T, Okada M. Topiramate and zonisamide prevent paradoxical intoxication induced by carbamazepine and phenytoin. Epilepsy Res 2009; 84:172-86. [PMID: 19268540 DOI: 10.1016/j.eplepsyres.2009.01.015] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [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: 11/23/2008] [Revised: 01/24/2009] [Accepted: 01/29/2009] [Indexed: 11/19/2022]
Abstract
The mechanisms of paradoxical aggravation of epileptic seizures induced by selected antiepileptic drugs (AEDs) remain unclear. The present study addressed this issue by determining the seizure-threshold doses of carbamazepine (CBZ) and phenytoin (PHT), as well the dose-dependent effects of CBZ, PHT, and carbonic anhydrase-inhibiting AEDs, acetazolamide (AZM), topiramate (TPM), and zonisamide (ZNS), on neurotransmitter release in rat hippocampus. The dose-dependent effects of AEDs on hippocampal extracellular levels of glutamate (Glu), GABA, norepinephrine (NE), dopamine (DA), and serotonin (5-HT) were determined by microdialysis with high-speed and high-sensitive extreme liquid chromatography. Proconvulsive effects of AEDs were determined by telemetric-electrocorticography. Therapeutically relevant doses of AZM, CBZ, TPM, and ZNS increased hippocampal extracellular levels of GABA, NE, DA, and 5-HT, while PHT had no effect. Supratherapeutic doses of AZM, CBZ, PHT, TPM, and ZNS decreased extracellular levels of GABA, NE, DA, and 5-HT, without affecting Glu levels. Toxic doses of CBZ and PHT produced seizures (paradoxical intoxication), markedly increasing all transmitter levels, but TPM and ZNS even at toxic doses did not produce seizure. Co-administration experiments showed that therapeutically relevant doses of CBZ or PHT reduced the seizure-threshold doses of PHT or CBZ, respectively. In contrast, therapeutically relevant doses of AZM, TPM, and ZNS elevated the seizure-threshold doses of CBZ and PHT. These results suggested that blockade of high percentage of the population of voltage-dependent sodium channels by CBZ and PHT might be important in inducing paradoxical intoxication/reaction, and that inhibition of carbonic anhydrase inhibits this effect. TPM and ZNS are candidate first-choice agents in treatment of epilepsy when first-line AEDs are ineffective.
Collapse
Affiliation(s)
- Satoshi Yamamura
- Department of Psychiatry, Division of Neuroscience, Graduate School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Takusagawa H, Yamamura S, Endo S, Ida K, Sugawara Y. Analysis of crystal growth of trigonal ribonuclease A from bovine pancreas. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308081348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
32
|
Hasegawa K, Ootaki M, Yamamura S, Sugawara Y. Crystal morphology and surface microtopograph of disodium inosine 5′-monophosphate octahydrate. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308081245] [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: 11/11/2022] Open
|
33
|
Yamamura S, Yamamoto A, Maruyama T, Nishi R, Sugiyama A, Sugawara Y. Polymorphs and humidity-induced transition of a serotonin receptor antagonist, C 29H 33N 3O 2·HCl· xH 2O. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308085528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
34
|
Nishikawa S, Yamamura S, Sugawara Y, Matsushita M, Sugawara T. Temperature-dependent disordered structure of (BEDT-TTF) 3Cl 2·5H 2O. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308084845] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
35
|
Sugawara T, Matsushita M, Komatsu H, Yamamura S, Sugawara Y. Genuine organic crystal exhibiting giant negative magnetoresistance. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308083384] [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: 11/11/2022] Open
|
36
|
Yamamura S, Morishima H, Kumano-go T, Suganuma N, Matsumoto H, Adachi H, Sigedo Y, Mikami A, Kai T, Masuyama A, Takano T, Sugita Y, Takeda M. The effect of Lactobacillus helveticus fermented milk on sleep and health perception in elderly subjects. Eur J Clin Nutr 2007; 63:100-5. [PMID: 17851460 DOI: 10.1038/sj.ejcn.1602898] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [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: 11/09/2022]
Abstract
OBJECTIVE To study the effect of Lactobacillus helveticus fermented milk on sleep and health perception in elderly healthy subjects. SUBJECTS The study included 29 healthy elderly subjects aged 60-81 years. METHODS Prospective, randomized, double-blind and placebo-controlled, with a crossover design. The study included two intervention periods of 3 weeks each, separated by a 3-week washout period. Subjects took 100 g of fermented milk drink or a placebo drink (artificially acidified milk) daily in the first supplementary period and the other drink in the second supplementary period. For each period, we measured sleep quality by means of actigraphy and a sleep questionnaire, and assessed the quality of life (QOL) by SF-36 health survey. RESULTS There was a significant improvement in sleep efficiency (P=0.03) and number of wakening episodes (P=0.007) in actigraph data after intake of fermented milk, whereas no significant changes were observed for the placebo. Fermented milk did not improve the SF-36 scores significantly from the baseline period. In the GH domain (general health perception) of the SF-36, however, there was marginal improvement as compared to the baseline period. Although the difference between fermented milk and placebo was not statistically significant for any of the sleep or QOL parameters, fermented milk produced slightly greater mean values for many parameters. CONCLUSION This short-term (3-week) intervention study indicates that Lactobacillus helveticus fermented milk may have a more favorable effect on improving sleep in healthy elderly people as compared with placebo.
Collapse
Affiliation(s)
- S Yamamura
- Psychiatry, Department of Integrated Medicine, Division of Internal Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Payne S, Day J, Cottrell S, deVos T, Yamamura S, Lograsso J, Sarroza D, O'Campo Y, Morotti A, Sledziewski A. 4009 POSTER Urine is the preferred remote body fluid for early identification of prostate cancer using real-time PCR detection of DNA methylation markers. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)71077-7] [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: 10/22/2022] Open
|
38
|
Suganuma N, Kikuchi T, Yanagi K, Yamamura S, Morishima H, Adachi H, Kumano-go T, Mikami A, Sugita Y, Takeda M. P0109 Media use increases sleep disturbance and obesity whereas insomnia associates eating habits. Sleep Med 2007. [DOI: 10.1016/s1389-9457(07)70364-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
39
|
Suganuma N, Kikuchi T, Yanagi K, Yamamura S, Morishima H, Adachi H, Kumano-go T, Mikami A, Sugita Y, Takeda M. P0049 Media use before sleep can curtail sleep time and increase sleep complaints. Sleep Med 2007. [DOI: 10.1016/s1389-9457(07)70308-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
40
|
|
41
|
Morello S, Ito K, Yamamura S, Lee KY, Jazrawi E, Desouza P, Barnes P, Cicala C, Adcock IM. IL-1 beta and TNF-alpha regulation of the adenosine receptor (A2A) expression: differential requirement for NF-kappa B binding to the proximal promoter. J Immunol 2007; 177:7173-83. [PMID: 17082635 DOI: 10.4049/jimmunol.177.10.7173] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Adenosine is a potent endogenous regulator of airway inflammation that acts through specific receptor subtypes that can either cause constriction (A1R, A2BR, and A3R) or relaxation (A2AR) of the airways. We therefore examined the effects of key inflammatory mediators on the expression of the A2AR in a lung epithelial cell line (A549). IL-1beta and TNF-alpha increased the expression of the A2AR gene at the mRNA and protein levels. In contrast, LPS had no effect on A2AR gene expression. IL-1beta and TNF-alpha rapidly activated p50 and p65, but not C-Rel, RelB, or p52, and both IL-1beta- and TNF-alpha-stimulated A2AR expression was inhibited by the IkappaB kinase 2 inhibitor AS602868 in a concentration-dependent manner. Using chromatin immunoprecipitation assays, we demonstrate that IL-1beta can enhance p65 association with putative kappaB binding sites in the A2AR promoter in a temporal manner. In contrast, TNF-alpha failed to enhance p65 binding to these putative sites. Functionally, the two most 5' kappaB sites were important for IL-1beta-, but not TNF-alpha-, induced A2AR promoter reporter gene activity. Finally, neither TNF-alpha nor Il-1beta had any effect on A2AR mRNA transcript degradation. These results directly implicate a major role for NF-kappaB in the regulation of A2AR gene transcription by IL-1beta and TNF-alpha but suggest that the effects of TNF-alpha on A2AR gene transcription are not mediated through the proximal promoter.
Collapse
Affiliation(s)
- Silvana Morello
- Airways Disease Section, NHLI Imperial College London, London, United Kingdom
| | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Lei S, Tero R, Misawa N, Yamamura S, Wan L, Urisu T. AFM characterization of gramicidin-A in tethered lipid membrane on silicon surface. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.07.091] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
43
|
Ito K, Yamamura S, Essilfie-Quaye S, Cosio B, Ito M, Barnes PJ, Adcock IM. Histone deacetylase 2-mediated deacetylation of the glucocorticoid receptor enables NF-kappaB suppression. ACTA ACUST UNITED AC 2005; 203:7-13. [PMID: 16380507 PMCID: PMC2118081 DOI: 10.1084/jem.20050466] [Citation(s) in RCA: 445] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Glucocorticoids are the most effective antiinflammatory agents for the treatment of chronic inflammatory diseases even though some diseases, such as chronic obstructive pulmonary disease (COPD), are relatively glucocorticoid insensitive. However, the molecular mechanism of this glucocorticoid insensitivity remains uncertain. We show that a defect of glucocorticoid receptor (GR) deacetylation caused by impaired histone deacetylase (HDAC) 2 induces glucocorticoid insensitivity toward nuclear factor (NF)-κB–mediated gene expression. Specific knockdown of HDAC2 by RNA interference resulted in reduced sensitivity to dexamethasone suppression of interleukin 1β–induced granulocyte/macrophage colony-stimulating factor production. Loss of HDAC2 did not reduce GR nuclear translocation, GR binding to glucocorticoid response element (GRE) on DNA, or GR-induced DNA or gene induction but inhibited the association between GR and NF-κB. GR becomes acetylated after ligand binding, and HDAC2-mediated GR deacetylation enables GR binding to the NF-κB complex. Site-directed mutagenesis of K494 and K495 reduced GR acetylation, and the ability to repress NF-κB–dependent gene expression becomes insensitive to histone deacetylase inhibition. In conclusion, we show that overexpression of HDAC2 in glucocorticoid-insensitive alveolar macrophages from patients with COPD is able to restore glucocorticoid sensitivity. Thus, reduction of HDAC2 plays a critical role in glucocorticoid insensitivity in repressing NF-κB–mediated, but not GRE-mediated, gene expression.
Collapse
Affiliation(s)
- Kazuhiro Ito
- Airway Disease Section, National Heart and Lung Institute, Imperial College, London SW3 6LY, England, UK.
| | | | | | | | | | | | | |
Collapse
|
44
|
Yamamura S, Moriguchi T, Yoneda S, Sugawara Y. Bifurcation and metastable states in phase transitions of nucleotide hydrates. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305086095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
45
|
Hatakeyama N, Yamazaki M, Shibuya N, Yamamura S, Momose Y. Effects of ketamine on voltage-dependent calcium currents and membrane potentials in single bullfrog atrial cells. J Anesth 2005; 15:149-53. [PMID: 14566513 DOI: 10.1007/s005400170017] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
PURPOSE This study was undertaken to assess the effect of ketamine on L-type calcium channel current (I(Ca)) and membrane action potential in the bullfrog single atrial myocyte. METHODS Bullfrog single atrial myocytes were prepared by enzymatic dispersion. Whole-cell voltage-clamp technique and current clamp technique were used to monitor I(Ca), membrane resting potential, and action potential. RESULTS Ketamine (10(-5)-10(-3) M) showed dose-dependent inhibition of I(Ca) in a reversible manner. The 50% inhibitory concentration (IC(50)) of ketamine on I(Ca) was estimated to be 0.92 x 10(-5) M. Use-dependent block of I(Ca) was not observed. The resting membrane potential was depolarized at a high concentration (10(-4) M) of ketamine. Reduction of the plateau phase and prolonged duration of the action potential were observed in the presence of a high concentration of ketamine (10(-4) M). CONCLUSION Ketamine has an inhibitory effect on I(Ca) in the bullfrog single atrial myocyte, and a high dose (10(-4) M) of ketamine prolonges the duration of the action potential. The mechanism of inhibition of I(Ca) seems to be a direct effect on the L-type calcium channel, not like an open channel blocker.
Collapse
Affiliation(s)
- N Hatakeyama
- Department of Anesthesiology, Toyama Medical and Pharmaceutical University, 2630 Sugitani, Toyama 930-0194, Japan
| | | | | | | | | |
Collapse
|
46
|
Yamamura S, Takehira R, Kawada K, Nishizawa K, Katayama S, Hirano M, Momose Y. Application of artificial neural network modelling to identify severely ill patients whose aminoglycoside concentrations are likely to fall below therapeutic concentrations. J Clin Pharm Ther 2004; 28:425-32. [PMID: 14632968 DOI: 10.1046/j.0269-4727.2003.00514.x] [Citation(s) in RCA: 12] [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: 11/20/2022]
Abstract
OBJECTIVE Identification of ICU patients whose concentrations are likely to fall below therapeutic concentrations using artificial neural network (ANN) modelling and individual patient physiologic data. METHOD Data on indicators of disease severity and some physiologic data were collected from 89 ICU patients who received arbekacin (ABK) and 61 who received amikacin (AMK). Three-layer ANN modelling and multivariate logistic regression analysis were used to predict the plasma concentrations of the aminoglycosides (ABK and AMK) in the severely ill patients. RESULTS Predictive performance analysis showed that the sensitivity and specificity of ANN modelling was superior to multivariate logistic regression analysis. For accurate modelling, a predictable range should be inferred from the data structure before the analysis. Restriction of the predictable region, based on the data structure, increased predictive performance. CONCLUSION ANN analysis was superior to multivariate logistic regression analysis in predicting which patients would have plasma concentrations lower than the minimum therapeutic concentration. To improve predictive performance, the predictable range should be inferred from the data structure before prediction. When applying ANN modelling in clinical settings, the predictive performance and predictable region should be investigated in detail to avoid the risk of harm to severely ill patients.
Collapse
Affiliation(s)
- S Yamamura
- School of Pharmaceutical Sciences, Toho University, Funabashi, Chiba, Japan.
| | | | | | | | | | | | | |
Collapse
|
47
|
Sugiura H, Yamamura S, Sato K, Katagiri H, Nishida Y, Nakashima H, Yamada Y. Remodelling and healing process of moderately heat-treated bone grafts after wide resection of bone and soft-tissue tumors. Arch Orthop Trauma Surg 2003; 123:514-20. [PMID: 12844230 DOI: 10.1007/s00402-003-0556-2] [Citation(s) in RCA: 18] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2002] [Indexed: 11/29/2022]
Abstract
INTRODUCTION In the reconstruction of extensive bone defects after massive resection of malignant musculoskeletal tumors, the clinical results of moderately heat-treated autogenous bone graft have rarely been documented. We evaluated the remodelling and healing process of moderately heat-treated autogenous bone graft by means of imaging features. MATERIALS AND METHODS The subjects of this study were 19 patients with bone and soft-tissue tumors treated by heat-treated bone graft at our institution between 1992 and 2001, the mean follow-up period was 4.8+/-2.8 years (range 1-9 years). The remodelling and healing process of heat-treated bone graft was evaluated by means of radiography, bone scintigraphy, and MRI. RESULTS The mean period to obtain bone union between host bone and grafted bone was 9.4 months. Infection was noted in 1 patient, and fracture was present in 2 patients. In 6 patients, pseudoarthrosis was found. Bone scintigraphy showed an increased uptake at the host-graft junction in the period between 3 and 36 months (median 10.7 months) postoperatively. A gradually increased diffuse uptake on the grafted side was evident at an average of 29.1 months (range 19-41 months) postoperatively. High signal intensity on T2-weighted images was observed in the early period after surgery, and iso-intense or low signal intensity became evident after an average of 28.3 months. A gradually increased diffuse uptake on scintigraphy and iso-intense or low signal intensity on T2-weighted images indicated remodelling of the grafted bone. CONCLUSION Bone union of a moderately heat-treated autogenous bone graft was noted at about 9 months, and its remodelling was proceeding at about 30 months. This method will be useful for bone defects after massive resection of soft-tissue and bone tumors.
Collapse
Affiliation(s)
- H Sugiura
- Orthopaedic Department, Aichi Cancer Center, 1-1 Kanokoden, Chikusa-ku, 464-8681, Nagoya, Japan.
| | | | | | | | | | | | | |
Collapse
|
48
|
Chokki M, Yamamura S, Eguchi H, Masegi T, Horiuchi H, Tanabe H, Kamimura T, Yasuoka S. Human airway trypsin-like protease increases mucin gene expression in airway epithelial cells. Am J Respir Cell Mol Biol 2003; 30:470-8. [PMID: 14500256 DOI: 10.1165/rcmb.2003-0199oc] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.5] [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] Open
Abstract
Human airway trypsin-like protease (HAT) is a serine protease found in sputum of patients with chronic airway diseases and is an agonist of protease-activated receptor-2 (PAR-2). Results from this study show that HAT treatment also enhances mucus production by the airway epithelial cell line NCI-H292 in vitro. Histologic examination showed that HAT enhances mucous glycoconjugate synthesis, whereas the PAR-2 agonist peptide (PAR-2 AP) has no such effect. HAT, but not PAR-2 AP, enhances MUC2 and MUC5AC gene expression 23-fold and 32-fold, respectively. The proteolytic activity of HAT is required to enhance MUC5AC gene expression; the addition of the inhibitors of trypsin-like protease activity of HAT, aprotinin and leupeptin, abolishes its enhancing effect. AG1478, anti-epidermal growth factor receptor (anti-EGFR)-neutralizing antibody, and anti-amphiregulin (AR)-neutralizing antibody all inhibited the stimulatory effect of HAT. Furthermore, HAT increases AR gene expression and subsequent AR protein release, whereas PAR-2 AP shows no such effects. These results indicate that HAT enhances mucin gene expression through an AR-EGFR pathway, and PAR-2 is not sufficient for or does not directly cause HAT-induced mucin gene expression. Thus, HAT might be a possible therapeutic target to prevent excessive mucus production in patients with chronic airway diseases.
Collapse
Affiliation(s)
- Manabu Chokki
- Pharmacological Research Department, Teijin Institute for Bio-Medical Research, Tokyo, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
49
|
Abstract
Celecoxib, a poorly water-soluble drug, was converted into a glassy state by melt quenching. The properties of glassy celecoxib were studied using infrared (IR) spectroscopy, differential scanning calorimetry (DSC), X-ray powder diffraction (XRPD), intrinsic dissolution rate (IDR), and thin-layer-chromatography (TLC). Glass transition occurred at 51.8 degrees C. Infrared spectrum of glass has revealed significant changes due to H-bonding. Celecoxib glass shows around 15 times faster dissolution as compared with the crystalline state. Heckel plot analysis has shown better compressibility in glassy state. Unpulverized glass remained stable for 3 months, whereas after pulverization about 70% crystallinity was gained in 100 hours. Further attempts may be carried out to stabilize the glass.
Collapse
Affiliation(s)
- A R Paradkar
- Department of Pharmaceutics, Poona College of Pharmacy, Bharati Vidyapeeth Deemed University, Erandwane, Pune, Maharashtra State, India.
| | | | | | | |
Collapse
|
50
|
Yamamura S, Sugawara Y, Terao H, Sugawara T. Structural phase transition and dielectric behavior of o-phenylenebis(squaric acid) salt. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302090980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|