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Fukuhara S, Takezawa K, Kiuchi H, Nonomura N, Iwasa A, Kobayashi K, Shirai M, Tsujimura A. Treatment of intravaginal ejaculation disorder using ejaculation aids: A multicenter prospective clinical trial. J Sex Med 2022. [DOI: 10.1016/j.jsxm.2022.03.449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Okada K, Fujita K, Fukuhara S, Imanaka T, Kuribayashi S, Sekii Y, Takezawa K, Kiuchi H, Nonomura N. Improvement of erectile dysfunction in germ cell tumor survivors. J Sex Med 2022. [DOI: 10.1016/j.jsxm.2022.03.451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Sekii Y, Kiuchi H, Imanaka T, Kuribayashi S, Okada K, Takezawa K, Fukuhara S, Nonomura N. Oxidative stress causes nocturnal polyuria via the SPAK-NCC pathway in the kidney: Amelioration by a novel antioxidant, silicon component agents. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00519-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Takezawa K, Fujita K, Matsushita M, Motooka D, Hatano K, Banno E, Shimizu N, Takao T, Takada S, Okada K, Fukuhara S, Kiuchi H, Uemura H, Nakamura S, Kojima Y, Nonomura N. The association between human gut microbiota and prostate enlargement. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00673-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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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
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Kiuchi H, Okada K, Sekii Y, Inagaki Y, Takezawa K, Fukuhara S, Nonomura N. Tadalafil and the efficacy on the post micturition dribble: Preliminary study. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33000-7] [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: 11/27/2022] Open
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Takezawa K, Ueda-Hayakawa I, Yamazaki F, Kambe N, Son Y, Okamoto H. Successful treatment with hydroxychloroquine for systemic lupus erythematosus with cutaneous involvement accompanied by a xanthomatous reaction. Lupus 2019; 29:79-82. [DOI: 10.1177/0961203319890677] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Antimalarials are usually recommended for the first-line systemic treatment of cutaneous lupus erythematosus. Alopecia in patients with discoid lupus erythematosus (DLE) is sometimes a refractory condition in spite of topical therapies. We herein described a case of DLE on the scalp with a pathological change of a xanthomatous reaction, which was successfully treated with hydroxychloroquine (HCQ). A 34-year-old woman presented with hair loss to the parietal region. She had been diagnosed with systemic lupus erythematosus (SLE) four years previously. Treatment with 30 mg/day of prednisolone (PSL) had been initiated, and the dose was gradually reduced. At 10 mg/day of PSL, she had noticed her hair loss. Physical examination revealed some small erythematous lesions to the parietal region with accompanying hair loss. Pathological findings of the erythematous lesion on her head revealed thickening of the basement membrane zone, the interface dermatitis with vacuolar degeneration, and both superficial perivascular and perifollicular infiltration of inflammatory cells in the dermis. In addition, there was an infiltrate of xanthomatous cells detected in the papillary dermis, which were positive for CD68 and CD163. The patient started treatment with HCQ at a dose of 200 mg/day. The skin lesions completely resolved within five months after initiation of HCQ without increase in the dose of PSL. Xanthomatous reactions are rarely recognized in lupus erythematosus. The chronic epithelial injury in DLE could be implicated in triggering the secondary reactive process of a xanthomatous reaction. We believe that the reaction seen in our patient was a secondary change to pathological alteration due to SLE. However, as yet unrecognized factors may play a role in the development of a xanthomatous reaction in DLE.
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Affiliation(s)
- K Takezawa
- Department of Dermatology, Kansai Medical University, Hirakata, Japan
| | - I Ueda-Hayakawa
- Department of Dermatology, Kansai Medical University, Hirakata, Japan
| | - F Yamazaki
- Department of Dermatology, Kansai Medical University, Hirakata, Japan
| | - N Kambe
- Department of Dermatology, Kansai Medical University, Hirakata, Japan
| | - Y Son
- Department of Rheumatology and Clinical Immunology, Kansai Medical University, Hirakata, Japan
| | - H Okamoto
- Department of Dermatology, Kansai Medical University, Hirakata, Japan
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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.
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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
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Soda T, Miyagawa Y, Ueda N, Takezawa K, Okuda H, Fukuhara S, Fujita K, Kiuchi H, Uemura M, Okamoto Y, Tsujimura A, Tanaka H, Nonomura N. Systematic characterization of human testis-specific actin capping protein β3 as a possible biomarker for male infertility. Hum Reprod 2018; 32:514-522. [PMID: 28104696 DOI: 10.1093/humrep/dew353] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Accepted: 12/16/2016] [Indexed: 11/13/2022] Open
Abstract
STUDY QUESTION Is actin capping protein (CP) β3 involved in human spermatogenesis and male infertility? SUMMARY ANSWER Human CPβ3 (hCPβ3) is expressed in testis, changes its localization dynamically during spermatogenesis, and has some association with male infertility. WHAT IS KNOWN ALREADY The testis-specific α subunit of CP (CPα3) was previously identified in human, and mutations in the cpα3 gene in mouse were shown to induce malformation of the sperm head and male infertility. However, CPβ3, which is considered to be a heterodimeric counterpart of CPα3, has been neither characterized in human nor reported in association with male infertility. STUDY DESIGN, SIZE, DURATION To confirm the existence of CPβ3 in human testis, fresh semen samples from proven fertile men were analyzed. To investigate protein expression during spermatogenesis, cryopreserved testis obtained from men with obstructive azoospermia were examined by immunofluorescent analysis. To assess the association of CP with male infertility, we compared protein expression of human CPα3 (hCPα3) and hCPβ3 using immunofluorescent analysis of cryopreserved sperm between men with normozoospermia (volunteers: Normo group, n = 20) and infertile men with oligozoospermia and/or asthenozoospermia (O + A group, n = 21). PARTICIPANTS/MATERIALS, SETTING, METHODS The tissue-specific expression of hCPβ3 was investigated by RT-PCR and Western blot analysis. To investigate whether hCPα3 and hCPβ3 form a heterodimer, a tandem expression vector containing hcpα3 tagged with monomeric red fluorescent protein 1 and hcpβ3 tagged with enhanced green fluorescent protein in a single plasmid was constructed and analyzed by co-immunoprecipitation (Co-IP) assay. The protein expression profiles of hCPα3 and hCPβ3 during spermatogenesis were examined by immunohistochemical analysis using human spermatogenic cells. The protein expressions of hCPα3 and hCPβ3 in sperm were compared between the Normo and O + A groups by immunohistochemical analysis. MAIN RESULTS AND THE ROLE OF CHANCE RT-PCR showed that mRNA of hcpβ3 was expressed exclusively in testis. Western blot analysis detected hCPβ3 with anti-bovine CPβ3 antibody. Co-IP assay with recombinant protein showed that hCPα3 and hCPβ3 form a protein complex. At each step during spermatogenesis, the cellular localization of hCPβ3 changed dynamically. In spermatogonia, hCPβ3 showed a slight signal in cytoplasm. hCPβ3 expression was conspicuous mainly from spermatocytes, and hCPβ3 localization dynamically migrated from cytoplasm to the acrosomal cap and acrosome. In mature spermatozoa, hCPβ3 accumulated in the postacrosomal region and less so at the midpiece of the tail. Double-staining analysis revealed that hCPα3 localization was identical to hCPβ3 at every step in the spermatogenic cells. Most spermatozoa from the Normo group were stained homogenously by both hCPα3 and hCPβ3. In contrast, significantly more spermatozoa in the O + A versus Normo group showed heterogeneous or lack of staining for either hCPα3 or hCPβ3 (abnormal staining) (P < 0.001). The percentage of abnormal staining was higher in the O + A group (52.4 ± 3.0%) than in the Normo group (31.2 ± 2.5%). Even by confining the observations to morphologically normal spermatozoa selected in accordance with David's criteria, the percentage of abnormal staining was still higher in the O + A group (39.9 ± 2.9%) versus the Normo group (22.5 ± 2.1%) (P < 0.001). hCPβ3 in conjunction with hCPα3 seemed to play an important role in spermatogenesis and may be associated with male infertility. LARGE SCALE DATA Not applicable. LIMITATIONS REASONS FOR CAUTION Owing to the difficulty of collecting fresh samples of human testis, we used cryopreserved samples from testicular sperm extraction. To examine the interaction of spermatogenic cells or localization in seminiferous tubules, fresh testis sample of healthy males are ideal. WIDER IMPLICATIONS OF THE FINDINGS The altered expression of hCPα3 and hCPβ3 may not only be a cause of male infertility but also a prognostic factor for the results of ART. They may be useful biomarkers to determine the fertilization ability of human sperm in ART. STUDY FUNDING/COMPETING INTEREST(S) This work was supported by a Grant-in-Aid for Young Scientists (B) from the Japan Society for the Promotion of Science (JP16K20133). The authors declare no competing interests.
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Affiliation(s)
- T Soda
- Department of Urology, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
| | - Y Miyagawa
- Department of Urology, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
| | - N Ueda
- Department of Urology, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
| | - K Takezawa
- Department of Urology, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
| | - H Okuda
- Monash Biomedicine Discovery Institute and Department of Anatomy and Developmental Biology, Monash University, Clayton, Victoria 3800, Australia
| | - S Fukuhara
- Department of Urology, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
| | - K Fujita
- Department of Urology, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
| | - H Kiuchi
- Department of Urology, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
| | - M Uemura
- Department of Urology, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
| | - Y Okamoto
- Okamoto Clinic, Osaka 558-0004, Japan
| | - A Tsujimura
- Department of Urology, Juntendo University Urayasu Hospital, Urayasu 279-0021, Japan
| | - H Tanaka
- Molecular Biology laboratory, Faculty of Pharmaceutical Sciences, Nagasaki International University, Sasebo, Nagasaki 859-3298, Japan
| | - N Nonomura
- Department of Urology, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
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Abstract
BACKGROUND The buccal branch of the mandibular division of the trigeminal nerve is commonly anaesthetized for dental procedures and may be damaged during surgery. Descriptions of the distribution of the buccal nerve (BN) in anatomical texts are generally lacking in detail and do not provide information about the extent of its variation between individuals. There are also commonly-held clinical beliefs about the BN that lack support from anatomical dissections. METHODS Detailed dissections of the course and distribution of the BN were performed in a sample of 12 hemi-heads from 11 edentulous and partially dentate human adult cadavers. RESULTS A broader distribution of the BN was found than described previously, with innervation extending to the lips in all cases. Approximately half of the lateral sides of the lips were innervated by the BN in two cases and approximately one-third of their lateral sides in the other 10 cases. Distribution of the BN to the lower lips was wider than to the upper lips. CONCLUSIONS Our findings provide a stronger anatomical basis to underpin clinical procedures involving the BN and indicate that some commonly-held clinical views about this nerve are not supported by anatomical evidence.
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Affiliation(s)
- K Takezawa
- Adelaide Dental School, The University of Adelaide, Adelaide, South Australia, Australia.,School of Life Dentistry at Niigata, The Nippon Dental University, Niigata, Japan
| | - M Ghabriel
- Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia
| | - G Townsend
- Adelaide Dental School, The University of Adelaide, Adelaide, South Australia, Australia
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11
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Sakai K, Okamoto I, Takezawa K, Hirashima T, Kaneda H, Takeda M, Matsumoto K, Kimura H, Fujita Y, Nakagawa K, Arao T, Nishio K. A Novel Mass Spectrometry-Based Assay for Diagnosis of EML4-ALK-Positive Non-Small-Cell Lung Cancer. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32266-3] [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: 10/25/2022] Open
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12
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Tanizaki J, Okamoto I, Takezawa K, Sakai K, Azuma K, Kuwata K, Yamaguchi H, Hatashita E, Nishio K, Janne PA, Nakagawa K. Combined effect of ALK and MEK inhibitors in EML4-ALK-positive non-small-cell lung cancer cells. Br J Cancer 2012; 106:763-7. [PMID: 22240786 PMCID: PMC3322944 DOI: 10.1038/bjc.2011.586] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [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: 11/22/2022] Open
Abstract
Background: Although most non-small-cell lung cancer (NSCLC) patients with the echinoderm microtubule-associated protein-like 4 (EML4) – anaplastic lymphoma kinase (ALK) fusion gene – benefit from ALK tyrosine kinase inhibitors (ALK-TKIs), the efficacy of these drugs varies greatly among individuals. Methods: The antitumour action of ALK-TKIs in EML4–ALK-positive NSCLC cell lines was evaluated from their effects on cell proliferation, signal transduction, and apoptosis. Results: The ALK-TKI TAE684 inhibited cell proliferation and induced apoptosis, in association with inhibition of STAT3 and ERK phosphorylation, in EML4–ALK-positive H3122 cells. TAE684 inhibited STAT3 phosphorylation, but not ERK phosphorylation, and it showed little effect on cell proliferation or apoptosis, in EML4–ALK-positive H2228 cells. The combination of TAE684 and a MEK inhibitor-induced marked apoptosis accompanied by inhibition of STAT3 and ERK pathways in H2228 cells. Such dual interruption of STAT3 and ERK pathways induced downregulation of the antiapoptotic protein survivin and upregulation of the proapoptotic protein BIM. Conclusion: Our results indicate that interruption of both STAT3-survivin and ERK–BIM pathways is required for induction of apoptosis in NSCLC harbouring EML4–ALK, providing a rationale for combination therapy with ALK and MEK inhibitors in EML4–ALK-positive NSCLC patients for whom ALK inhibitors alone are ineffective.
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Affiliation(s)
- J Tanizaki
- Department of Medical Oncology, Kinki University Faculty of Medicine, 377-2 Ohno-higashi, Osaka-Sayama, Osaka 589-8511, Japan
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13
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Yoshino K, Ohta Y, Takezawa K, Kinouchi T, Kamiura S. Bladder cancer co-existing with ovarian cancer coincidentally detected by transvaginal ultrasonography. J OBSTET GYNAECOL 2011; 31:196-7. [PMID: 21281051 DOI: 10.3109/01443615.2010.529519] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- K Yoshino
- Departments of Gynecology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan.
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14
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Takezawa K, Okamoto I, Tsukioka S, Uchida J, Kiniwa M, Fukuoka M, Nakagawa K. Identification of thymidylate synthase as a potential therapeutic target for lung cancer. Br J Cancer 2010; 103:354-61. [PMID: 20628382 PMCID: PMC2920030 DOI: 10.1038/sj.bjc.6605793] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [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: 01/23/2023] Open
Abstract
Background: Thymidylate synthase (TS), a key enzyme in the de novo synthesis of thymidine, is an important chemotherapeutic target for malignant tumours including lung cancer. Although inhibition of TS has an antiproliferative effect in cancer cells, the precise mechanism of this effect has remained unclear. Methods: We examined the effects of TS inhibition with an RNA interference-based approach. The effect of TS depletion on the growth of lung cancer cells was examined using colorimetric assay and flow cytometry. Results: Measurement of the enzymatic activity of TS in 30 human lung cancer cell lines revealed that such activity differs among tumour histotypes. Almost complete elimination of TS activity by RNA interference resulted in inhibition of cell proliferation in all tested cell lines, suggestive of a pivotal role for TS in cell proliferation independent of the original level of enzyme activity. The antiproliferative effect of TS depletion was accompanied by arrest of cells in S phase of the cell cycle and the induction of caspase-dependent apoptosis as well as by changes in the expression levels of cyclin E and c-Myc. Moreover, TS depletion induced downregulation of the antiapoptotic protein X-linked inhibitor of apoptosis (XIAP), and it seemed to activate the mitochondrial pathway of apoptosis. Conclusion: Our data provide insight into the biological relevance of TS as well as a basis for clinical development of TS-targeted therapy for lung cancer.
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Affiliation(s)
- K Takezawa
- Department of Medical Oncology, Kinki University School of Medicine, 377-2 Ohno-higashi, Osaka-Sayama, Osaka 589-8511, Japan
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15
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Iwasa T, Okamoto I, Takezawa K, Yamanaka K, Nakahara T, Kita A, Koutoku H, Sasamata M, Hatashita E, Yamada Y, Kuwata K, Fukuoka M, Nakagawa K. Marked anti-tumour activity of the combination of YM155, a novel survivin suppressant, and platinum-based drugs. Br J Cancer 2010; 103:36-42. [PMID: 20517311 PMCID: PMC2905296 DOI: 10.1038/sj.bjc.6605713] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [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: 11/09/2022] Open
Abstract
BACKGROUND Survivin, a member of the inhibitor of apoptosis protein family, is an attractive target for cancer therapy. We have now investigated the effects of the combination of YM155, a novel small-molecule inhibitor of survivin expression, and platinum compounds (cisplatin and carboplatin) on human non-small cell lung cancer (NSCLC) cell lines. METHODS The anti-cancer efficacy of YM155 in combination with platinum compounds was evaluated on the basis of cell death and progression of tumour xenografts. Platinum compound-induced DNA damage was evaluated by immunofluorescence analysis of histone gamma-H2AX. RESULTS Immunofluorescence analysis of histone gamma-H2AX showed that YM155 delayed the repair of double-strand breaks induced in nuclear DNA by platinum compounds. The combination of YM155 and platinum compounds also induced synergistic increases both in the number of apoptotic cells and in the activity of caspase-3. Finally, combination therapy with YM155 and platinum compounds delayed the growth of NSCLC tumour xenografts in nude mice to an extent greater than that apparent with either treatment modality alone. CONCLUSION These results suggest that YM155 sensitises tumour cells to platinum compounds both in vitro and in vivo, and that this effect is likely attributable to the inhibition of DNA repair and consequent enhancement of apoptosis.
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Affiliation(s)
- T Iwasa
- Department of Medical Oncology, Kinki University School of Medicine, 377-2 Ohno-higashi, Osaka-Sayama, Osaka 589-8511, Japan
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16
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Saito T, Saito R, Suwa H, Yakushiji F, Takezawa K, Nakamura M. P01-305 - Differences in the treatment response to antithyroid drugs versus electroconvulsive therapy in a case of recurrent catatonia with graves’ disease. Eur Psychiatry 2010. [DOI: 10.1016/s0924-9338(10)70513-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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17
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Okamoto K, Okamoto I, Takezawa K, Tachibana I, Fukuoka M, Nishimura Y, Nakagawa K. Cisplatin and Etoposide Chemotherapy Combined with Early Concurrent Twice-daily Thoracic Radiotherapy for Limited-disease Small Cell Lung Cancer in Elderly Patients. Jpn J Clin Oncol 2009; 40:54-9. [DOI: 10.1093/jjco/hyp137] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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18
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Kakimoto K, Ono Y, Meguro N, Takezawa K, Yoshida T, Arai Y, Usami M. Stage I nonseminomatous germ cell tumors of the testis: Clinical outcome of 45 patients on a surveillance protocol after orchiectomy alone at a single institution in Japan. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e16165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e16165 Background: In Japan, risk-adapted treatment for patients with clinical stage I nonseminomatous germ cell tumor of the testis (NSGCTT) has been performed in very few institutions. This retrospective study was performed to evaluate histopathologic prognostic factors with stage I NSGCTT for whom careful follow-up with a surveillance protocol was possible at a single institution. Methods: We included 45 patients with a median age of 31 years (range 16 - 58) who were managed with a surveillance strategy after orchiectomy in our department between 1972 and 2006. Mean duration of follow-up was 8.1 years (range 1.4 –30). The patients were monitored at follow-up evaluation for tumor marker (AFP, beta-hCG) levels and by abdominal CT scan, chest x-ray, and physical examination. Primary testis tumor samples were assessed for prognostic factors including lymphatic and/or vascular (LV) invasion and pathological components such as the presence of embryonal carcinoma. Log-rank analyses were performed to identify prognostic factors. Results: All patients were alive and disease-free. Relapses occurred in 16 (35.6%) patients after a median follow-up of 5.7 months (range 3–45). In 11 patients (68.8 %), relapse was detected in the retroperitoneal lymph nodes. Two patients (12.5%) had metastases in the retroperitoneal lymph nodes and lungs, two patients (12.5%) had metastases in the lungs alone, and one patient (6.2%) had metastases in the retroperitoneal lymph nodes, lungs, and brain. LV invasion was identified in 17 patients, 53% of whom had relapsed, and relapse was found in 25% of 28 patients without LV invasion (p<0.01). Of 31 patients with an embryonal carcinoma component, 13 patients (42%) developed metastases, whereas 21% of those without an embryonal carcinoma component developed metastases (p=0.04). After chemotherapy and/or surgical treatment for relapse, the 5-year overall survival rate was 100%. Conclusions: As in previous reports, the presence of an embryonal carcinoma component and LV invasion appeared to be factors suggesting a high likelihood of relapse. The surveillance protocol described here is a reliable strategy for stage I NSGCTT patients if careful long-term follow-up is possible. No significant financial relationships to disclose.
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Affiliation(s)
- K. Kakimoto
- Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan
| | - Y. Ono
- Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan
| | - N. Meguro
- Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan
| | - K. Takezawa
- Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan
| | - T. Yoshida
- Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan
| | - Y. Arai
- Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan
| | - M. Usami
- Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan
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19
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Kakimoto K, Ono Y, Meguro N, Takezawa K, Yoshida T, Kinouchi T, Usami M. Extragonadal germ cell tumors: Retrospective analysis at a single institution in Japan. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.16135] [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: 11/20/2022] Open
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20
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Fiedorowicz JG, Takezawa K, Robinson RG. Risk factors for and correlates of poststroke depression following discontinuation of antidepressants. J Neuropsychiatry Clin Neurosci 2008; 19:399-405. [PMID: 18070842 DOI: 10.1176/jnp.2007.19.4.399] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The authors randomly assigned nondepressed patients at least 3 months poststroke to receive nortriptyline, fluoxetine, or placebo for 3 months using double-blind methodology. Patients were followed at 3, 6, 9, and 21 months for new onset of depression. In patients treated with antidepressants, lesion volume and degree of social impairment were associated with subsequent late-onset of poststroke depression at 6 and 9 months. In the placebo group, severity of impairment in activities of daily living, at 3 and 9 months, was associated with late onset poststroke depression. Differences in the clinical/pathological correlates may reflect subtle differences in the pathophysiology of poststroke depression following prophylactic antidepressants.
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Affiliation(s)
- Jess G Fiedorowicz
- Department of Psychiatry, Roy J. and Lucille A. Carver College of Medicine, The University of Iowa, Iowa City, Iowa, USA.
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21
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Ichinose K, Nakamura M, Takezawa K, Masutomi I, Shima Y, Hirayama Y, Sorimachi K, Shimizu T, Ishikawa H, Kaji N, Nakajima S, Wataru M, Nishigaki S, Suwa H, Toyama Y, Okumura M, Ishitsuka Y, Shimizu K, Kokubo K, Sasaki K, Saito S. [Life-long education of a specialists is possible only through daily activities as clinical instructors being evaluated by interns and mutual efforts for advancement]. Seishin Shinkeigaku Zasshi 2006; 108:945-54. [PMID: 17137200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
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22
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Tsunoda M, Takezawa K, Imai K. A method for the measurement of catechol-O-methyltransferase activity using norepinephrine, an endogenous substrate. Analyst 2001; 126:637-40. [PMID: 11394305 DOI: 10.1039/b100119l] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We propose a highly sensitive method for the measurement of catechol-O-methyltransferase (COMT) activity with norepinephrine (NE), an endogenous native substrate. The product, normetanephrine, was determined by high-performance liquid chromatography (HPLC)-peroxyoxalate chemiluminescence reaction detection or, if required, less sensitive fluorescence detection. For the measurement of membrane-bound (MB)-COMT activity in the rat erythrocyte, the HPLC-peroxyoxalate chemiluminescence reaction detection was employed. Soluble (S)- and MB-COMT activities in the rat erythrocyte were 22.9 +/- 2.5 and 4.62 +/- 1.23 pmol min-1 (mg protein)-1, respectively (n = 5). The Km values obtained for S- and MB-COMT were 366 +/- 31 mumol l-1 and 12.0 +/- 1.1 mumol l-1, respectively (n = 5), suggesting that the use of NE as a substrate would give more precise information on the role of both isoenzymes. However, with dihydroxybenzoic acid as an artificial substrate, the Km values for S- and MB-COMT were similar, with values of 69.2 +/- 11.4 mumol l-1 and 72.2 +/- 9.2 mumol l-1, respectively. The proposed method is thought to be useful for the measurement of both S-COMT and MB-COMT activities, and would give us critical information on the role of metabolism of catecholamines in rat tissues.
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Affiliation(s)
- M Tsunoda
- Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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23
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Abstract
The determination of catecholamines and their 3-O-methyl metabolites in a single mouse plasma is necessary to understand the role of the sympathetic nervous activity, while the inactivation of catecholamines by catechol-O-methyltransferase indicates the activity of blood pressure regulation in animals. Here we report the basal catecholamines and their 3-O-methyl metabolite concentrations obtained from 15 microL of mouse plasma utilizing semi-microcolumn high-performance liquid chromatography (HPLC)-peroxyoxalate chemiluminescence detection system. The concentrations were 6.63 +/- 1.37 pmol/mL plasma, 0.49 +/- 0.10 pmol/mL plasma, 5.25 +/- 2.30 pmol/mL plasma, 3.23 +/- 0.84 pmol/mL plasma, 0.44 +/- 0.11 pmol/mL plasma, and 3.39 +/- 1.67 pmol/mL plasma for norepinephrine, epinephrine, dopamine, normetanephrine, metanephrine and 3-methoxytyramine, respectively (n = 5-7). Further, when blood pressure was reduced by minoxidil, plasma catecholamines were found to be significantly increased by the baroreflex-mediated response in mouse.
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Affiliation(s)
- M Tsunoda
- Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Abstract
We describe a method for non-parametric regression which combines regression trees with radial basis function networks. The method is similar to that of Kubat, who was first to suggest such a combination, but has some significant improvements. We demonstrate the features of the new method, compare its performance with other methods on DELVE data sets and apply it to a real world problem involving the classification of soybean plants from digital images.
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Affiliation(s)
- M Orr
- Division of Informatics, University of Edinburgh, Scotland
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25
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Takezawa K, Tsunoda M, Watanabe N, Imai K. An automatic analyzer for catecholamines and their 3-O-methyl metabolites using a micro coulometric flow cell as a postcolumn reactor for fluorogenic reaction. Anal Chem 2000; 72:4009-14. [PMID: 10994958 DOI: 10.1021/ac0003697] [Citation(s) in RCA: 34] [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: 11/30/2022]
Abstract
A coulometric flow cell for a miniaturized LC system was developed. The cell was examined, as 3-O-methyl catecholamines were converted to their relative omicron-quinones for subsequent fluorometric and chemiluminescence detection. Its performance was evaluated in comparison with commercially available amperometric and coulometric detectors in terms of specification of the low dead volume and high conversion efficiency. The fully automated small-bore LC analyzer for simultaneous determination of catecholamines and their 3-O-methyl metabolites included precolumn pretreatment, column switching, column separation, postcolumn oxidative conversion, fluorometric derivatization, and chemiluminescence detection. The detection limits were 0.3-2.0 fmol for catecholamines and their 3-O-methyl metabolites. Because of the high sensitivity, the required volume of rat plasma sample was only 15 microL.
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Affiliation(s)
- K Takezawa
- Graduate School of Pharmaceutical Sciences and Graduate School of Engineering, The University of Tokyo, Japan
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26
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Abstract
Antidiuretic actions induced by two growth hormone (GH) isoforms (20 K- and 22 K-hGH; 0.2 and 2.0 mg/kg) were evaluated in rats, as fluid retention may cause oedema, one of the adverse effects of GH. Both GH isoforms (2.0 mg/kg) suppressed urine excretion in hypophysectomized rats (P< 0.01), but only the 22 K-hGH isoform (2.0 mg/kg) suppressed urine excretion in intact rats (P< 0.01). In addition, prolactin (PRL) suppressed urine excretion in intact rats (P< 0.05). In conclusion, 20 K-hGH has less potency in causing urine retention than 22 K-hGH and since 20 K-hGH is missing 15 amino acids found in 22 K-hGH, these amino acids may be important for the antidiuretic action of GH. Since prolactin suppressed urine excretion, a part of the antidiuretic action of GH may be related to PRL-R activation.
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Affiliation(s)
- N Satozawa
- Medicinal Research Department, Institute of Biological Science, Mitsui Pharmaceuticals Inc., Chiba, Japan.
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27
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Okubo T, Takezawa K, Kimura H. Suspension viscosity of colloidal crystals and liquids in exhaustively deionized aqueous suspensions coexisting with ion-exchange resins. Colloid Polym Sci 2000. [DOI: 10.1007/s003960050557] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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Tsunoda M, Takezawa K, Santa T, Ina Y, Nagashima K, Ohmori K, Kobayashi S, Imai K. New approach for measurement of sympathetic nervous abnormality in conscious, spontaneously hypertensive rats. Jpn J Pharmacol 2000; 83:39-45. [PMID: 10887939 DOI: 10.1254/jjp.83.39] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
We previously reported a highly sensitive chemiluminescence high-performance liquid chromatographic method to determine catecholamines in plasma. In this study, we employed this method to measure the cardiac function and plasma norepinephrine (NE) concentration in conscious rats. Benidipine, 1,4-dihydropyridine calcium antagonist (4 mg/kg), and beta-blocker (propranolol, 30 mg/kg) were administered orally to conscious spontaneously hypertensive rats (SHRs) and Wistar-Kyoto (WKY) rats, and blood pressure, heart rate and plasma NE levels were measured. Plasma NE concentration was used as an index of sympathetic nervous system activity in conscious rats. The basal plasma NE levels were significantly higher in SHRs than in WKY rats (P<0.05), indicating the activity of the basal sympathetic nervous system in SHRs was elevated. The sensitivity of the baroreflex-mediated sympathetic nervous response was reduced in SHRs as compared to that in WKY rats. The concomitant administration of benidipine and a beta-blocker decreased heart rate without affecting the baroreflex-mediated sympathetic nervous response, indicating that propranolol might suppress mainly the cardiac beta-adrenoceptor. The present study suggested the high activity of the basal sympathetic nervous system and the reduced response of the baroreflex-mediated sympathetic nervous system in SHRs compared to WKY rats in the conscious condition.
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Affiliation(s)
- M Tsunoda
- Department of Bio-Analytical Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Japan
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29
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Takezawa K, Tsunoda M, Murayama K, Santa T, Imai K. Automatic semi-microcolumn liquid chromatographic determination of catecholamines in rat plasma utilizing peroxyoxalate chemiluminescence reaction. Analyst 2000; 125:293-6. [PMID: 10820891 DOI: 10.1039/a907715d] [Citation(s) in RCA: 49] [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] [Indexed: 11/21/2022]
Abstract
A fully automated and highly sensitive method with a semi-microcolumn liquid chromatography system for the determination of rat plasma catecholamines (CAs) was developed. Automated on-line extraction of CAs in diluted plasma using a precolumn packed with strong acidic cation exchange resin was coupled with separation of CAs on a semi-microcolumn (250 x 1.5 mm id). fluorogenic derivatization with ethylenediamine and finally postcolumn peroxyoxalate chemiluminescence detection utilizing bis[2-(3,6,9-trioxadecanyloxycarbonyl)-4-nitrophenyl]oxalate (TDPO) and hydrogen peroxide. The detection limits were 0.91, 0.36 and 1.1 fmol for norepinephrine (noradrenaline), epinephrine (adrenaline) and dopamine, respectively, at a signal-to-noise ratio of 3. A good linearity of the calibration curve for each CA was observed in the range of 5.0 to 500 fmol for each CA using N-methyldopamine (N-MeDA) as an internal standard. The RSD for the proposed method (n = 5) were 3.7-9.5% for the intra-day assay and 6.6-10.0% for the inter-day assay. The volume of rat plasma required for the determination of CAs was 10 microliters.
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Affiliation(s)
- K Takezawa
- Graduate School of Pharmaceutical Sciences, University of Tokyo, Japan
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30
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Yamori T, Matsunaga A, Sato S, Yamazaki K, Komi A, Ishizu K, Mita I, Edatsugi H, Matsuba Y, Takezawa K, Nakanishi O, Kohno H, Nakajima Y, Komatsu H, Andoh T, Tsuruo T. Potent antitumor activity of MS-247, a novel DNA minor groove binder, evaluated by an in vitro and in vivo human cancer cell line panel. Cancer Res 1999; 59:4042-9. [PMID: 10463605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
We synthesized a novel anticancer agent MS-247 (2-[[N-[1-methyl-2-[5-[N-[4-[N,N-bis(2-chloroethyl) amino] phenyl]] carbamoyl]-1H-benzimidazol-2-yl] pyrrol-4-yl] carbamoyl] ethyldimethylsulfonium di-p-toluenesulfonate) that has a netropsin-like moiety and an alkylating residue in the structure. We evaluated antitumor activity of MS-247 using a human cancer cell line panel coupled with a drug sensitivity database and subsequently using human cancer xenografts. The average MS-247 concentration required for 50% growth inhibition against a panel of 39 cell lines was 0.71 microM. The COMPARE analysis revealed that the differential growth inhibition pattern of MS-247 significantly correlated with those of camptothecin analogues and anthracyclins, indicating that MS-247 and the two drug groups might have similar modes of action. MS-247 exhibited remarkable antitumor activity against various xenografts. A single i.v. injection of MS-247 significantly inhibited the growth of all 17 xenografts tested, which included lung, colon, stomach, breast, and ovarian cancers. In many cases, MS-247 was more efficacious than cisplatin, Adriamycin, 5-fluorouracil, cyclophosphamide, VP-16, and vincristine and was almost comparable with paclitaxel and CPT-11; these are the most clinically promising drugs at present. MS-247 was noticeably more effective than paclitaxel (in HCT-15) and CPT-11 (in A549, HBC-4, and SK-OV-3). The toxicity of MS-247, indicated by body weight loss, was reversible within 10 days after administration. The MS-247 mode of action showed DNA binding activity at the site where Hoechst 33342 bound, inhibited topoisomerases I and II (as expected by the COMPARE analysis) blocked the cell cycle at the G2-M phase, and induced apoptosis. These results indicate that MS-247 is a promising new anticancer drug candidate to be developed further toward clinical trials.
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Affiliation(s)
- T Yamori
- Division of Experimental Chemotherapy, Cancer Chemotherapy Center, Japanese Foundation for Cancer Research, Tokyo
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31
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Tsunoda M, Takezawa K, Santa T, Imai K. Simultaneous automatic determination of catecholamines and their 3-O-methyl metabolites in rat plasma by high-performance liquid chromatography using peroxyoxalate chemiluminescence reaction. Anal Biochem 1999; 269:386-92. [PMID: 10222014 DOI: 10.1006/abio.1999.4043] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.6] [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: 11/22/2022]
Abstract
A highly specific and sensitive automated high-performance liquid chromatographic method for the simultaneous determination of catecholamines (CAs; norepinephrine, epinephrine, and dopamine) and their 3-O-methyl metabolites (normetanephrine, metanephrine, and 3-methoxytyramine) is described. Automated precolumn ion-exchange extraction of diluted plasma is coupled with HPLC separation of CAs and their 3-O-methyl metabolites on an ODS column, postcolumn coulometric oxidation, fluorescence derivatization with ethylenediamine, and finally peroxyoxalate chemiluminescence reaction detection. The detection limits were about 3 fmol for norepinephrine, epinephrine, and dopamine, 5 fmol for normetanephrine, and 10 fmol for metanephrine and 3-methoxytyramine (signal-to-noise ratio of 3). Fifty microliters of rat plasma was used and 4-methoxytyramine was employed as an internal standard. The relative standard deviations for the method (n = 5) were 2.5-7.6% for the intraday assay and 6.3-9.1% for the interday assay. The method was applicable to the determination of normetanephrine and metanephrine in 50 microl of rat plasma.
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Affiliation(s)
- M Tsunoda
- Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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32
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Abstract
Pulmonary cryptococcosis was diagnosed by examining smears obtained by fine-needle aspiration (FNA) in a patient with pituitary Cushing's disease. FNA allowed for rapid diagnosis and prompt treatment of a potentially serious infection. The patient fully recovered from her pulmonary disease. Although opportunistic infections may occur in patients with endogenous Cushing's syndrome, it is rare to see such infections in the subset of patients with pituitary Cushing's disease. Hypercortisolism associated with Cushing's syndrome appears to induce a transitory immune deficiency state and opens a window of opportunity for certain infectious agents such as Cryptococcus neoformans to exploit. To our knowledge, this is the third such case reported in this clinical setting, and the first diagnosed by FNA.
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Affiliation(s)
- P A Drew
- Department of Pathology and Laboratory Medicine, University of Florida College of Medicine, Gainesville 32610-0275, USA
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33
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Abstract
OBJECTIVE Warthin tumor of the salivary gland is composed of oncocytic epithelium with a prominent follicular lymphoid infiltrate. The purpose of this study was to characterize the clonality of this lymphoid component by means of polymerase chain reaction technology. STUDY DESIGN DNA was isolated from paraffin-embedded tissue from 20 cases of typical Warthin tumor of the salivary gland and amplified by polymerase chain reaction to assess B- and T-cell clonality. RESULTS No dominant clonal populations were identified in any tumor. However, minor clonal expansions of both B and T cells were detected in up to 50% of tumors (immunoglobulin H, 50%; T-cell antigen receptor beta, 10%; T-cell antigen receptor gamma, 5%). No tumors showed evidence of bcl-2 proto-oncogene translocation, whereas 95% contained detectable Epstein-Barr virus DNA. CONCLUSION The B- and T-cell components of Warthin tumor are polyclonal with oligoclonal expansion of both T and B cells in some lesions.
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MESH Headings
- Adenolymphoma/genetics
- Adenolymphoma/pathology
- Adenolymphoma/virology
- Aged
- Aged, 80 and over
- B-Lymphocytes/pathology
- Clone Cells/pathology
- DNA, Neoplasm/analysis
- DNA, Viral/analysis
- Epithelium/pathology
- Female
- Gene Rearrangement
- Gene Rearrangement, B-Lymphocyte
- Gene Rearrangement, T-Lymphocyte
- Genes, bcl-2/genetics
- Herpesvirus 4, Human/genetics
- Herpesvirus 4, Human/isolation & purification
- Humans
- Immunoglobulin Heavy Chains/analysis
- Immunoglobulins/analysis
- Male
- Middle Aged
- Molecular Biology
- Parotid Neoplasms/genetics
- Parotid Neoplasms/pathology
- Parotid Neoplasms/virology
- Polymerase Chain Reaction
- Polymorphism, Single-Stranded Conformational
- Proto-Oncogene Mas
- Receptors, Antigen, T-Cell, alpha-beta/analysis
- Receptors, Antigen, T-Cell, gamma-delta/analysis
- T-Lymphocytes/pathology
- Translocation, Genetic/genetics
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Affiliation(s)
- K Takezawa
- Brown University School of Medicine, Providence, RI, USA
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34
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Nagai N, Nagai K, Chun SJ, Shimizu K, Takezawa K, Tsuji M, Sugahara K, Nakagawa H. Roles of the suprachiasmatic nucleus and vasoactive intestinal peptide in the response of plasma arginine vasopressin to osmotic challenge. Endocrinology 1996; 137:504-7. [PMID: 8593795 DOI: 10.1210/endo.137.2.8593795] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
To clarify the role of neurons containing a vasoactive intestinal peptide (VIP)-like substance (VIP neurons) in the hypothalamic suprachiasmatic nucleus (SCN) in regulation of the plasma arginine vasopressin (AVP) concentration, we examined the effects of bilateral lesions of the SCN and intracranial injection of VIP on the increase in the plasma AVP concentration caused by ip injection of hypertonic (3.6%) saline in rats. The increase in the plasma AVP concentration after ip injection of hypertonic saline was significantly suppressed in rats with bilateral lesions of the SCN. Furthermore, the increase in the plasma AVP concentration elicited by ip injection of hypertonic saline was enhanced by intracerebro-ventricular injection of VIP and suppressed by a VIP antagonist, [Lys1,Pro2,5,Arg3.4,Tyr6]VIP. However, the same dose of VIP injected into the heart had no effect on the increase in the plasma AVP concentration caused by ip injection of hypertonic saline. These results suggest that the SCN and intracranial VIP play important roles in the regulation of the plasma AVP concentration and support the possibility that VIP neurons in the SCN enhance the response of plasma AVP to osmotic challenge.
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Affiliation(s)
- N Nagai
- Division of Protein Metabolism, Osaka University, Japan
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35
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Abstract
Two hundred thirty-eight patients admitted consecutively to a critical care unit through an emergency room were assessed prospectively for the presence of delirium. Thirty-eight patients (16%) developed delirium. Delirium occurred with equal frequency in all disease categories. The presence of abnormal head imaging which required medical intervention did not predict the development of delirium. The median delay between admission and the development of delirious was 4 days, however, one-fourth of the patients were delirious on the day of admission. The patients with abnormal head imaging who required medical intervention had a higher frequency of onset of delirium on the first day compared with patients without. The delirium lasted a median of 5 days and resolved within a week in over 70% of patients. These results confirm that delirium is frequently present in patients who require acute critical care after emergency room evaluation. In this population, serious medical disease is a better predictor of the development of delirium than the presence of abnormal brain imaging which required medical intervention. Although delirious patients have longer lengths of stay, the presence of delirium does not predict higher mortality, as has been reported in other populations. This could be because delirious patients admitted to the critical care unit through the emergency room have fewer premorbid medical problems predisposing them to poor outcome.
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Affiliation(s)
- Y Kishi
- Department of Neuropsychiatry, Nippon Medical School, Tokyo, Japan
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36
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Nagai N, Nagai K, Takezawa K, Chun SJ, Nakagawa H. Suppressive effect of vasopressin on the hyperglycemic response to intracranial injection of 2-deoxy-D-glucose. Neurosci Lett 1995; 190:187-90. [PMID: 7637890 DOI: 10.1016/0304-3940(95)11536-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Vasopressin (VP) is a peptide consisting of 9 amino acids which acts as a neurotransmitter or neuromodulator in the central nervous system. Neurons containing VP project to some nuclei in the hypothalamus that have a role in energy metabolism. To clarify the possible role of VP on glucose metabolism in the brain, we examined the effect of intracranial injection of VP on the hyperglycemia induced by 2-deoxy-D-glucose (2DG) and obtained the following results. The hyperglycemic and hyperglucagonemic responses induced by 2DG were significantly suppressed and enhanced by co-injections of VP and a VP-antagonist with 2DG, respectively. However, co-injections of either VP or a VP-antagonist with 2DG had no effect on the change in plasma insulin concentration. These findings suggest that central VP plays a suppressive role in the hyperglycemic and hyperglucagonemic responses to 2DG.
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Affiliation(s)
- N Nagai
- Division of Protein Metabolism, Osaka University, Japan
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37
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Takezawa K, Moorthy B, Mandel ML, Garancis JC, Ghazarian JG. Antigenic and catalytic disparity in the distribution of cytochrome P-450-dependent 25-hydroxyvitamin D3-1 alpha- and 24-hydroxylases. Histochemistry 1990; 95:37-42. [PMID: 2286531 DOI: 10.1007/bf00737226] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Chick 25-hydroxyvitamin D3-1 alpha-hydroxylase, a cytochrome P-450 monooxygenase with a molecular weight of 57 kDa, can be isolated as described by Mandel et al. (1990 b). Under normal physiological circumstances, it occurs exclusively in kidney mitochondria. An isozyme of the 1 alpha-hydroxylase, known as the 24-hydroxylase, which uses the same substrate to yield an isomeric product, is also a cytochrome P-450 monooxygenase, has a molecular weight of 55 kDa, and like-wise occurs in kidney mitochondria. The amino-terminal sequences of the first 10 residues of the two isozymes are 100% homologous. Monoclonal antibodies of the IgM class raised against the 1 alpha-hydroxylase, which quantitatively discriminate against other P-450 cytochromes of mitochondrial or microsomal origin, recognize and interact with the 24-hydroxylase as an antigen. In the present study we show that the intestine, which is the only non-renal tissue with demonstrable 24-hydroxylase activity, gives a positive peroxidase-antiperoxidase immunohistochemical reaction using the monoclonal antibodies against the 1 alpha-hydroxylase. The reactions revealed that the antigen in the kidney is restricted to the cortical proximal tubular cells while in the intestine, the antigen is localized in the enterocytes of the villi. In kidney medullary or intestinal crypt cells, or in liver, heart and lung tissues where 1 alpha-hydroxylase or 24-hydroxylase activity could not be detected using cell or tissue homogenates, the immunohistochemical reactions were also negative.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- K Takezawa
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee 53226
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38
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Abstract
This study compared the effects of atriopeptin III (AP III) on sodium excretion and renal interstitial hydrostatic pressure (RIHP) in control rats and in rats pretreated with 2-bromoethylamine (BEA) to produce papillary necrosis. In control rats, infusion of AP III (100 ng.kg-1.min-1) increased sodium excretion from 2.2 +/- 0.7 to 6.4 +/- 0.9 microeq.min-1.g kidney wt-1 and RIHP from 6.8 +/- 0.7 to 8.7 +/- 0.9 mmHg, whereas glomerular filtration rate and renal blood flow were unaltered. Similar results were obtained in rats pretreated with BEA 48 h before the experiment. In rats studied 6 wk after BEA treatment, the papilla was absent and there was atrophy of juxtamedullary nephrons. AP III did not alter sodium excretion or RIHP in this group of rats. These results indicate that 1) an intact renal papilla and/or juxtamedullary nephron population may be required for the natriuretic effect of AP III; 2) the papillary injury 48 h after BEA is not sufficient to abolish the natriuretic response to AP III; and 3) elevations in RIHP may play a role in the natriuretic response to AP III.
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Affiliation(s)
- J Garcia-Estañ
- Department of Physiology, Medical College of Wisconsin, Milwaukee, 53226
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39
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Takezawa K, Cowley AW, Skelton M, Roman RJ. Atriopeptin III alters renal medullary hemodynamics and the pressure-diuresis response in rats. Am J Physiol 1987; 252:F992-1002. [PMID: 2954473 DOI: 10.1152/ajprenal.1987.252.6.f992] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The effects of atriopeptin III on the renal response to changes in renal perfusion pressure (RPP) were examined in uninephrectomized and adrenalectomized rats. Neural influences on the kidney were eliminated by renal denervation. Plasma levels of antidiuretic hormone (ADH), angiotensin II, aldosterone, corticosterone, and norepinephrine were controlled by intravenous infusion. Infusion of atriopeptin III at a dose of 30 or 100 ng X kg-1 X min-1 increased plasma levels of atrial natriuretic peptide from 101 +/- 8 pg/ml to 424 +/- 16 and 2,553 +/- 308 pg/ml, respectively. In control rats, increasing RPP in two steps from 100 to 125 to 150 mmHg produced sixfold increases in sodium and water excretion. The slopes of the relationships between fractional sodium and water excretion and RPP were enhanced by approximately 10, 20, and 40% in the rats infused with the 30, 100, and 500 ng X kg-1 X min-1 dose of atriopeptin III. Renal blood flow and glomerular filtration rate were not significantly different in vehicle- and atriopeptin III-infused rats at any RPP studied. Papillary blood flow measured with a laser-Doppler flowmeter increased 15% within the first 5 min of infusion of atriopeptin III at a dose of 100 ng X kg-1 X min-1. Cortical blood flow was not significantly altered. The rise in papillary blood flow during atriopeptin III infusion, however, may be a consequence and not the cause of the natriuresis and diuresis, since urine flow increased before significant changes in papillary blood flow were detected. These studies suggest that atrial natriuretic factor could influence the long-term control of arterial pressure by altering renal medullary hemodynamics and promoting the elimination of sodium and water. The plasma levels of atrial natriuretic peptide needed to alter the pressure-natriuresis relationship, however, may exceed levels that can be attained in vivo with endogenous release.
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40
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Mizuiri S, Ozawa T, Hirata K, Takezawa K, Kawamura S. Characteristic changes of the juxtaglomerular cells before and after treatment of pseudo-Bartter's syndrome due to furosemide abuse. Nephron Clin Pract 1987; 46:23-7. [PMID: 3600908 DOI: 10.1159/000184290] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Histological and ultrastructural studies of juxtaglomerular cells (JGC) were performed in a patient with pseudo-Bartter's syndrome due to furosemide abuse. The biopsy done before the treatment revealed a large number of secretory granules and mitochondria, dilated rough endoplasmic reticulum and a well-developed Golgi apparatus in JGC. The JGC granules, some of which contained crystalloid structures showed various shapes and sizes. In the biopsy carried out after the cessation of furosemide intake, these morphological changes were markedly improved with a reduced activity of the renin-angiotensin system. The characteristic changes of JGC may be valuable in determing the functional and morphological interrelations of this disorder.
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41
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Nakamura K, Takezawa K, Igarashi M, Kurima T. [Urinary kallikrein excretion in patients with nephrotic syndrome and evaluation of the anlytical methods]. Rinsho Byori 1984; 32:299-303. [PMID: 6564158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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42
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Nakamura K, Takezawa K, Abei T, Hirata K, Igarashi N. [Etiological studies of essential hypertension. D. Kallikrein-kinin system and prostaglandins system]. Nihon Rinsho 1984; 42:289-92. [PMID: 6562194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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43
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Kit M, Narasimhan MJ, Anderson JA, Zimmermann U, Pilwat G, Furuya T, Tani Y, Kolehmainen SE, Tarkkanen V, Barrett SP, Gestrelius SM, Belloc A, Florent J, Lunel J, Palla J, Mancy D, Bailey JE, Cho YK, Mouri T, Kayama H, Foley SE, Oriel PJ, Epstein CC, Kimura K, Spraker PW, Ljungdahl LG, Wieget JKW, Levine DW, Thilly WG, Wang DIC, Wong JS, Eisinger MG, Young FE, Wilson GA, Mottice SL, Green H, Kehinde O, Buhler M, Olofsson M, Osseux PF, Degen L, Branduzzi P, Olivieri R, Cimini N, Kang KS, Veeder GT, Latymer Z, Andersen G, Drobot W, Monsheimer R, Pfleiderer E, Hidaka H, Kohno T, Eida T, Weisrock WP, Stevens VC, Takezawa K, Hiratani H, Wandrey C, Wichmann R, Leuchtenberger W, Kula M, Buckmann A, Troller J, Koshugi J, Frommer W, Muller L, Schmidt D, Puls W, Krause H, Heber U, Cohen SN, Wahl GM, Stark GR, Collins J, Hohn B, Sugano H, Matsui Y. Patents and literature. Appl Biochem Biotechnol 1982; 7:217-30. [DOI: 10.1007/bf02798299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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44
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Maehara S, Takezawa K, Hosokawa K, Saito I. [Survey on the attitudes of married working women and the management toward maternal welfare legislation]. Hokenfu Zasshi 1975; 31:587-600. [PMID: 1042380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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45
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Takezawa K, Sato S. A study on the fine structure in metastable β 1crystal of Cu–40 wt.% Zn alloy. J Appl Crystallogr 1975. [DOI: 10.1107/s0021889875009880] [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
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46
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Aikawa T, Matsutaka H, Takezawa K, Ishikawa E. Gluconeogenesis and amino acid metabolism. I. Comparison of various precursors for hepatic gluconeogenesis in vivo. Biochim Biophys Acta 1972; 279:234-44. [PMID: 5082497 DOI: 10.1016/0304-4165(72)90139-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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