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Kobayashi Y, Yatsu K, Haruna A, Kawano R, Ozawa M, Haze T, Komiya S, Suzuki S, Ohki Y, Fujiwara A, Saka S, Hirawa N, Toya Y, Tamura K. ATP2B1 gene polymorphisms associated with resistant hypertension in the Japanese population. J Clin Hypertens (Greenwich) 2024; 26:355-362. [PMID: 38430457 PMCID: PMC11007809 DOI: 10.1111/jch.14785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 02/07/2024] [Accepted: 02/11/2024] [Indexed: 03/03/2024]
Abstract
Single-nucleotide polymorphisms (SNP) of ATP2B1 gene are associated with essential hypertension but their association with resistant hypertension (RHT) remains unexplored. The authors examined the relationship between ATP2B1 SNPs and RHT by genotyping 12 SNPs in ATP2B1 gene of 1124 Japanese individuals with lifestyle-related diseases. Patients with RHT had inadequate blood pressure (BP) control using three antihypertensive drugs or used ≥4 antihypertensive drugs. Patients with controlled hypertension had BP controlled using ≤3 antihypertensive drugs. The association between each SNP and RHT was analyzed by logistic regression. The final cohort had 888 (79.0%) and 43 (3.8%) patients with controlled hypertension and RHT, respectively. Compared with patients homozygous for the minor allele of each SNP in ATP2B1, a significantly higher number of patients carrying the major allele at 10 SNPs exhibited RHT (most significant at rs1401982: 5.8% vs. 0.8%, p = .014; least significant at rs11105378: 5.7% vs. 0.9%, p = .035; most nonsignificant at rs12817819: 5.1% vs. 10%, p = .413). After multivariate adjustment for age, sex, systolic BP, and other confounders, the association remained significant for rs2681472 and rs1401982 (OR: 7.60, p < .05 and OR: 7.62, p = .049, respectively). Additionally, rs2681472 and rs1401982 were in linkage disequilibrium with rs11105378. This study identified two ATP2B1 SNPs associated with RHT in the Japanese population. rs1401982 was most closely associated with RHT, and major allele carriers of rs1401982 required significantly more antihypertensive medications. Analysis of ATP2B1 SNPs in patients with hypertension can help in early prediction of RHT and identification of high-risk patients who are more likely to require more antihypertensive medications.
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Affiliation(s)
- Yusuke Kobayashi
- Center for Novel and Exploratory Clinical Trials (Y‐NEXT)Yokohama City UniversityYokohamaJapan
- Department of Medical Science and Cardiorenal MedicineYokohama City University Graduate School of MedicineYokohamaJapan
| | | | - Aiko Haruna
- Department of Nephrology and HypertensionYokohama City University Medical CenterYokohamaJapan
| | - Rina Kawano
- Department of Nephrology and HypertensionYokohama City University Medical CenterYokohamaJapan
| | - Moe Ozawa
- Department of Medical Science and Cardiorenal MedicineYokohama City University Graduate School of MedicineYokohamaJapan
- Department of Nephrology and HypertensionSaiseikai Yokohamashi Nanbu HospitalYokohamaJapan
| | - Tatsuya Haze
- Center for Novel and Exploratory Clinical Trials (Y‐NEXT)Yokohama City UniversityYokohamaJapan
- Department of Nephrology and HypertensionYokohama City University Medical CenterYokohamaJapan
| | - Shiro Komiya
- Department of Nephrology and HypertensionSaiseikai Yokohamashi Nanbu HospitalYokohamaJapan
| | - Shota Suzuki
- Department of Nephrology and HypertensionYokohama City University Medical CenterYokohamaJapan
| | - Yuki Ohki
- Department of Nephrology and HypertensionYokohama City University Medical CenterYokohamaJapan
| | - Akira Fujiwara
- Department of Nephrology and HypertensionYokohama City University Medical CenterYokohamaJapan
| | - Sanae Saka
- Department of Nephrology and HypertensionSaiseikai Yokohamashi Nanbu HospitalYokohamaJapan
| | - Nobuhito Hirawa
- Department of Nephrology and HypertensionYokohama City University Medical CenterYokohamaJapan
| | - Yoshiyuki Toya
- Department of Medical Science and Cardiorenal MedicineYokohama City University Graduate School of MedicineYokohamaJapan
| | - Kouichi Tamura
- Department of Medical Science and Cardiorenal MedicineYokohama City University Graduate School of MedicineYokohamaJapan
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Fujiwara A, Ozawa M, Sumida K, Hirawa N, Yatsu K, Ichihara N, Haze T, Komiya S, Ohki Y, Kobayashi Y, Wakui H, Tamura K. LPIN1 is a new target gene for essential hypertension. J Hypertens 2022; 40:536-543. [PMID: 34772856 DOI: 10.1097/hjh.0000000000003046] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND We previously showed Lipin1 (LPIN1) to be a candidate gene for essential hypertension by genome-wide association studies. LPIN1 encodes the Lipin 1 protein, which contributes to the maintenance of lipid metabolism and glucose homeostasis. However, little is known about the association between LPIN1 and blood pressure (BP). METHODS We evaluated the BP of LPIN1-deficient [fatty liver dystrophy (fld)] mice and explored related mechanisms. RESULTS Fld mice have very low expression of LPIN1 and exhibit fatty liver, hypertriglyceridemia, insulin resistance and peripheral neuropathy. Fld mice had significantly elevated SBP and heart rate (HR) throughout the day as measured by a radiotelemetric method. Diurnal variation of SBP and HR was also absent in fld mice. Furthermore, urinary excretion of adrenaline and noradrenaline by fld mice was significantly higher compared with that of control mice. The BP response of fld mice to clonidine (a centrally acting α2-adrenergic receptor agonist) was greater than that of control mice. However, levels of Angiotensinogen and Renin 1 mRNA and urinary nitric oxide excretion were comparable between the two groups. The decrease in SBP at 8 weeks after fat grafting surgery was significantly greater in the transplant group compared with the sham operated group. CONCLUSION The elevated BP in fld mice may result from activation of the sympathetic nervous system through decreased levels of adipose cytokines. These results indicate that LPIN1 plays a crucial role in blood pressure regulation and that LPIN1 is a new target gene for essential hypertension.
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Affiliation(s)
- Akira Fujiwara
- Department of Nephrology and Hypertension, Yokohama City University Medical Center
| | - Moe Ozawa
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama
| | - Koichiro Sumida
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama
| | - Nobuhito Hirawa
- Department of Nephrology and Hypertension, Yokohama City University Medical Center
| | - Keisuke Yatsu
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama
| | - Nao Ichihara
- Department of Healthcare Quality Assessment, University of Tokyo Graduate School of Medicine, Tokyo
| | - Tatsuya Haze
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama
| | - Shiro Komiya
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama
| | - Yuki Ohki
- Department of Nephrology and Hypertension, Yokohama City University Medical Center
| | - Yusuke Kobayashi
- Center for Novel and Exploratory Clinical Trials (Y-NEXT), Yokohama City University Hospital, Yokohama, Japan
| | - Hiromichi Wakui
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama
| | - Kouichi Tamura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama
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Meguro A, Ishihara M, Petrek M, Yamamoto K, Takeuchi M, Mrazek F, Kolek V, Benicka A, Yamane T, Shibuya E, Yoshino A, Isomoto A, Ota M, Yatsu K, Shijubo N, Nagai S, Yamaguchi E, Yamaguchi T, Namba K, Kaburaki T, Takase H, Morimoto SI, Hori J, Kono K, Goto H, Suda T, Ikushima S, Ando Y, Takenaka S, Takeuchi M, Yuasa T, Sugisaki K, Ohguro N, Hiraoka M, Kitaichi N, Sugiyama Y, Horita N, Asukata Y, Kawagoe T, Kimura I, Ishido M, Inoko H, Mochizuki M, Ohno S, Bahram S, Remmers EF, Kastner DL, Mizuki N. Genetic control of CCL24, POR, and IL23R contributes to the pathogenesis of sarcoidosis. Commun Biol 2020; 3:465. [PMID: 32826979 PMCID: PMC7442816 DOI: 10.1038/s42003-020-01185-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 10/02/2019] [Accepted: 07/30/2020] [Indexed: 12/17/2022] Open
Abstract
Sarcoidosis is a genetically complex systemic inflammatory disease that affects multiple organs. We present a GWAS of a Japanese cohort (700 sarcoidosis cases and 886 controls) with replication in independent samples from Japan (931 cases and 1,042 controls) and the Czech Republic (265 cases and 264 controls). We identified three loci outside the HLA complex, CCL24, STYXL1-SRRM3, and C1orf141-IL23R, which showed genome-wide significant associations (P < 5.0 × 10−8) with sarcoidosis; CCL24 and STYXL1-SRRM3 were novel. The disease-risk alleles in CCL24 and IL23R were associated with reduced CCL24 and IL23R expression, respectively. The disease-risk allele in STYXL1-SRRM3 was associated with elevated POR expression. These results suggest that genetic control of CCL24, POR, and IL23R expression contribute to the pathogenesis of sarcoidosis. We speculate that the CCL24 risk allele might be involved in a polarized Th1 response in sarcoidosis, and that POR and IL23R risk alleles may lead to diminished host defense against sarcoidosis pathogens. Akira Meguro et al. report a genome-wide association study for sarcoidosis—a systemic inflammatory disease—in the Japanese population. They identify 3 non-HLA loci with genome-wide significance, 2 of which have not been previously associated with sarcoidosis in any population.
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Affiliation(s)
- Akira Meguro
- Department of Ophthalmology and Visual Science, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan
| | - Mami Ishihara
- Department of Ophthalmology and Visual Science, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan
| | - Martin Petrek
- Department of Pathological Physiology, Faculty of Medicine and Dentistry, Palacky University, Hnevotinska Str., 77515, Olomouc, Czech Republic
| | - Ken Yamamoto
- Department of Medical Biochemistry, Kurume University School of Medicine, 67 Asahimachi, Kurume, Fukuoka, 830-0011, Japan.,Division of Genome Analysis, Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, Fukuoka, 812-8582, Japan
| | - Masaki Takeuchi
- Department of Ophthalmology and Visual Science, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan.,Inflammatory Disease Section, National Human Genome Research Institute, National Institutes of Health, 10 Center Drive, 10 CRC East/B2-5235, Bethesda, MD, 20892-1849, USA
| | - Frantisek Mrazek
- Department of Immunology, Faculty of Medicine and Dentistry, Palacky University, I.P.Pavlova Str. 6, 77520, Olomouc, Czech Republic
| | - Vitezslav Kolek
- Department of Respiratory Medicine, Faculty of Medicine and Dentistry, Palacky University, I. P. Pavlova Str. 6, 77900, Olomouc, Czech Republic
| | - Alzbeta Benicka
- Department of Pathological Physiology, Faculty of Medicine and Dentistry, Palacky University, Hnevotinska Str., 77515, Olomouc, Czech Republic
| | - Takahiro Yamane
- Department of Ophthalmology and Visual Science, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan
| | - Etsuko Shibuya
- Department of Ophthalmology and Visual Science, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan
| | - Atsushi Yoshino
- Department of Ophthalmology and Visual Science, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan
| | - Akiko Isomoto
- Division of Genome Analysis, Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, Fukuoka, 812-8582, Japan
| | - Masao Ota
- Department of Ophthalmology and Visual Science, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan.,Division of Hepatology and Gastroenterology, Department of Medicine, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan.,INSERM Franco-Japanese "Laboratoire International Associé" (LIA) Nextgen HLA Laboratory, Strasbourg, France.,INSERM Franco-Japanese "Laboratoire International Associé" (LIA) Nextgen HLA Laboratory, Nagano, Japan
| | - Keisuke Yatsu
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan
| | - Noriharu Shijubo
- Department of Respiratory Medicine, Japan Railway Sapporo Hospital, Higashi-1, Kita-3, Chuo-ku, Sapporo, 060-0033, Japan
| | - Sonoko Nagai
- Kyoto Central Clinic/Clinical Research Center, 56-58 Masuyacho Sanjo-Takakura, Nakagyo-ku, Kyoto, 604-8111, Japan
| | - Etsuro Yamaguchi
- Division of Respiratory Medicine and Allergology, Aichi Medical University, 21 Karimata, Yazako, Nagakute-cho, Aichi-gun, Aichi, 480-1195, Japan
| | - Tetsuo Yamaguchi
- Department of Respiratory Medicine, Japan Railway Tokyo General Hospital, 2-1-3 Yoyogi, Shibuya-ku, Tokyo, 151-0053, Japan
| | - Kenichi Namba
- Department of Ophthalmology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, N15, W7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Toshikatsu Kaburaki
- Department of Ophthalmology, University of Tokyo School of Medicine, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Hiroshi Takase
- Department of Ophthalmology and Visual Science, Tokyo Medical and Dental University Graduate School of Medicine, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Shin-Ichiro Morimoto
- Division of Cardiology, Department of Internal Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukakecho, Toyoake, Aichi, 470-1192, Japan
| | - Junko Hori
- Department of Ophthalmology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8602, Japan
| | - Keiko Kono
- Department of Ophthalmology, Kono Medical Clinic, 3-30-28 Soshigaya, Setagaya-ku, Tokyo, 157-0072, Japan
| | - Hiroshi Goto
- Department of Ophthalmology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
| | - Takafumi Suda
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Soichiro Ikushima
- Department of Respiratory Medicine, Japanese Red Cross Medical Centre, 4-1-22 Hiroo, Shibuya-ku, Tokyo, 150-8953, Japan
| | - Yasutaka Ando
- Department of Ophthalmology, Kitasato Institute Hospital, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8642, Japan.,Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-0016, Japan
| | - Shinobu Takenaka
- Department of Respiratory Diseases, Kumamoto City Hospital, 1-1-60 Kotoh, Kumamoto, Kumamoto, 862-8505, Japan
| | - Masaru Takeuchi
- Department of Ophthalmology, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama, 359-8513, Japan
| | - Takenosuke Yuasa
- Yuasa Eye Clinic, 3-1-1 Nishimoto-cho, Nishi-ku, Osaka, 550-0005, Japan
| | - Katsunori Sugisaki
- Department of Internal Medicine, National Hospital Organization Nishibeppu National Hospital, 4548 Oaza-Tsurumi, Beppu, Oita, 874-0840, Japan
| | - Nobuyuki Ohguro
- Department of Ophthalmology, Japan Community Health care Organization Osaka Hospital, 4-2-78 Fukushima, Fukushima-ku, Osaka, 553-0003, Japan
| | - Miki Hiraoka
- Department of Ophthalmology, School of Medicine, Sapporo Medical University, S1 W16 Chuo-ku, Sapporo, Hokkaido, 060-8543, Japan
| | - Nobuyoshi Kitaichi
- Department of Ophthalmology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, N15, W7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan.,Department of Ophthalmology, Health Sciences University of Hokkaido, Ainosato 2-5, Kita-ku, Sapporo, Hokkaido, 002-8072, Japan
| | - Yukihiko Sugiyama
- Division of Pulmonary Medicine, Department of Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan
| | - Nobuyuki Horita
- Inflammatory Disease Section, National Human Genome Research Institute, National Institutes of Health, 10 Center Drive, 10 CRC East/B2-5235, Bethesda, MD, 20892-1849, USA.,Department of Pulmonology, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan
| | - Yuri Asukata
- Department of Ophthalmology and Visual Science, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan
| | - Tatsukata Kawagoe
- Department of Ophthalmology and Visual Science, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan
| | - Ikuko Kimura
- Department of Ophthalmology and Visual Science, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan
| | - Mizuho Ishido
- Department of Ophthalmology and Visual Science, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan
| | - Hidetoshi Inoko
- INSERM Franco-Japanese "Laboratoire International Associé" (LIA) Nextgen HLA Laboratory, Strasbourg, France.,INSERM Franco-Japanese "Laboratoire International Associé" (LIA) Nextgen HLA Laboratory, Nagano, Japan.,Department of Molecular Life Science, Division of Molecular Medical Science and Molecular Medicine, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa, 259-1193, Japan
| | - Manabu Mochizuki
- Department of Ophthalmology and Visual Science, Tokyo Medical and Dental University Graduate School of Medicine, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Shigeaki Ohno
- Department of Ophthalmology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, N15, W7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan.,Department of Ophthalmology, Health Sciences University of Hokkaido, Ainosato 2-5, Kita-ku, Sapporo, Hokkaido, 002-8072, Japan
| | - Seiamak Bahram
- INSERM Franco-Japanese "Laboratoire International Associé" (LIA) Nextgen HLA Laboratory, Strasbourg, France.,INSERM Franco-Japanese "Laboratoire International Associé" (LIA) Nextgen HLA Laboratory, Nagano, Japan.,Plateforme GENOMAX, Laboratoire d'ImmunoRhumatologie Moléculaire, INSERM UMR_S1109, LabEx Transplantex, Centre de Recherche d'Immunologie et d'Hématologie. Faculté de Médecine, Fédération Hospitalo-Universitaire (FHU) OMICARE, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg, Strasbourg, France
| | - Elaine F Remmers
- Inflammatory Disease Section, National Human Genome Research Institute, National Institutes of Health, 10 Center Drive, 10 CRC East/B2-5235, Bethesda, MD, 20892-1849, USA
| | - Daniel L Kastner
- Inflammatory Disease Section, National Human Genome Research Institute, National Institutes of Health, 10 Center Drive, 10 CRC East/B2-5235, Bethesda, MD, 20892-1849, USA
| | - Nobuhisa Mizuki
- Department of Ophthalmology and Visual Science, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan.
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Sakima A, Satonaka H, Nishida N, Yatsu K, Arima H. Optimal blood pressure targets for patients with hypertension: a systematic review and meta-analysis. Hypertens Res 2019; 42:483-495. [PMID: 30948822 DOI: 10.1038/s41440-018-0123-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 08/27/2018] [Accepted: 08/30/2018] [Indexed: 12/11/2022]
Abstract
Optimal blood pressure (BP) targets for hypertension have been an important clinical issue but have been elusive. The Systolic Blood Pressure Intervention Trial (SPRINT) showed significant benefits of intensive BP-lowering treatment with a target systolic BP level of < 120 mm Hg on major cardiovascular (CV) events and mortality, whereas there was a modest increase in renal events related to BP-lowering treatment. We searched the PubMed, Cochrane CENTRAL, and ICHUSHI databases for randomized trials that assigned participants to intensive versus usual BP-lowering treatment with different BP targets. The outcomes were major CV events, all-cause death, myocardial infarction, stroke, heart failure, renal events, and adverse events. Nineteen trials that enrolled a total of 55,529 participants with a mean follow-up duration ranging from 1.6 to 12.2 years were included in the present analysis. There was a significant reduction in major CV events, myocardial infarction, and stroke and a trend toward a reduction in heart failure associated with intensive BP-lowering treatment, but no differences in the risks of all-cause death, renal events, or adverse events were observed between the randomized groups. Subgroup analyses indicated that intensive BP-lowering treatment with a target of < 130/80 mm Hg and/or achievement of BP < 130/80 mm Hg were associated with a significant reduction in major CV events compared with the usual group. In conclusion, intensive BP-lowering treatment reduces the risk of CV events. A target BP level of < 130/80 mm Hg appears to be optimal for CV protection in patients with hypertension.
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Affiliation(s)
- Atsushi Sakima
- Health Administration Center, University of the Ryukyus, Nishihara, Japan. .,Department of Cardiovascular Medicine, Nephrology and Neurology, University of the Ryukyus, Graduate School of Medicine, Nishihara, Japan.
| | - Hiroshi Satonaka
- Department of Cardiology and Nephrology, Dokkyo Medical University, Mibu, Japan
| | - Norifumi Nishida
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Keisuke Yatsu
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Hisatomi Arima
- Department of Preventive Medicine and Public Health, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
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5
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sumida K, Hirawa N, Yatsu K, Ehara Y, Oki Y, Fujita M, Fujiwara A, Kobayashi Y, Wakui H, Umemura S, Tamura K. Abstract P237: Elucidation of Blood Pressure Control Function of Essential Hypertension Candidate Gene Lpin1. Hypertension 2018. [DOI: 10.1161/hyp.72.suppl_1.p237] [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: 11/16/2022]
Abstract
We have found that the LPIN1 is the candidate gene for essential hypertension (EHT) by genome-wide association analysis in 2007. Mice characterized by loss of body fat, fatty liver, insulin resistance and peripheral neuropathy were discovered in nature and named fatty liver dystrophy (fld) mice in 2000. Recently, the fld mice were shown that they exhibit few LPIN1 genes, and the LPIN1 gene was proved as the cause of phenotype of fld mice. However, the blood pressure (BP) and the alteratios of the vasoactive factors in fld mice have not yet been elucidated. Therefore, to clarify the BP and the effects of LPIN1 gene defeciency, we analyzed the BP and regulatory factors of the fld mice. Furthermore, we transplanted the fat to fld mice, and clarify the importance of adipocytokine on BP in the model mice. The BP were measured by the tail cuff method and the telemetry method. We performe fat grafting or sham surgery on fld mice, and systolic BP (SBP) was measured by tail cuff method 8 weeks after surgery. We confirmed that the SBP of fld mice were higher than that of CO by the tail cuff method( fld 134±5 vs CO 111±4 mmHg P<0.05). Furthermore, SBP of the fld mice were higher than that of CO (fld 167.7±9.8 vs CO 133.5±10.9 mmHg P<0.01) by the telemetry method. It was confirmed that the adrenalin and noradrenalin excretions in the urine of fld mice were higher than those of CO(fld 0.133±0.067 vs CO 0.038±0.013 μg/day P<0.01 )(fld 0.980 ±0.313 vs CO 0.364±0.080 μg/day P<0.001). There is no significant difference in plasma aldosterone concentration between two groups( fld 434±276.7 vs CO 781±469.5 pg/mL n.s).The SBP tended to decrease with the fat trasplantation in fld mice ( fat transplanted 103.7±4.41 vs sham 114.7±7.67 mmHg P=0.056). We confirmed that fld mouse exhibits higher SBP by both tailcuff method and telemetry method. Because the fld mice exhibit higher PR and high levels of CA concentration and excretion in urine, it was suggested that the sympathetic nervous systems of fld mice were activated. Sympathetic nervous system activity may be related to an increase in BP of fld mouse, and further research is under way. Since it showed that BP decreased by fat grafting, the visceral fat are essential for fld mice to BP control. The implications of adipokine and other fats are under consideration.
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Affiliation(s)
| | | | | | | | - Yuki Oki
- yokohama sity university, yokohama, Japan
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6
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Kagimoto M, Yatsu K, Oka A, Sumida G, Ehara Y, Ooki Y, Hirawa N, Sugano T, Ishigami T, Ishikawa T, Tamura K. 2353Plasma lysoGb3 useful as biomarker in screening for Fabry disease in patients with mild left ventricular hypertrophy. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.2353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M Kagimoto
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardiorenal Medicine, Yokohama, Japan
| | - K Yatsu
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardiorenal Medicine, Yokohama, Japan
| | - A Oka
- Tokai University, The Institute of Medical Sciences, Isehara, Japan
| | - G Sumida
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardiorenal Medicine, Yokohama, Japan
| | - Y Ehara
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardiorenal Medicine, Yokohama, Japan
| | - Y Ooki
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardiorenal Medicine, Yokohama, Japan
| | - N Hirawa
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardiorenal Medicine, Yokohama, Japan
| | - T Sugano
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardiorenal Medicine, Yokohama, Japan
| | - T Ishigami
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardiorenal Medicine, Yokohama, Japan
| | - T Ishikawa
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardiorenal Medicine, Yokohama, Japan
| | - K Tamura
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardiorenal Medicine, Yokohama, Japan
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7
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Kobayashi Y, Ishiguro H, Fujikawa T, Kobayashi H, Sumida K, Kagimoto M, Okuyama Y, Ehara Y, Katsumata M, Fujita M, Fujiwara A, Saka S, Yatsu K, Hirawa N, Toya Y, Yasuda G, Umemura S, Tamura K. Atherosclerosis of the carotid bulb is associated with the severity of orthostatic hypotension in non-diabetic adult patients: a cross-sectional study. Clin Exp Hypertens 2018; 41:1-8. [PMID: 29672186 DOI: 10.1080/10641963.2018.1465073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 03/20/2018] [Accepted: 04/10/2018] [Indexed: 10/17/2022]
Abstract
BACKGROUND The carotid bulb has a high density of baroreceptors that play an important role in maintaining blood pressure. We hypothesized that atherosclerosis of the carotid bulb would reflect the severity of orthostatic hypotension more accurately than would atherosclerosis of other carotid artery segments. METHODS This cross-sectional study included 198 non-diabetic adults. We measured the cardio-vascular ankle index as an index of arterial stiffness, intima-media thickness in each carotid artery segment (internal carotid artery, carotid bulb, distal and proximal portions, respectively, of the common carotid artery) as a measure of atherosclerosis, and heart rate variability as a measure of cardiac autonomic function. The sit-to-stand test was used to assess severity of orthostatic hypotension. RESULTS Intima-media thickness of the carotid bulb was correlated with orthostatic systolic blood pressure change (r = -0.218, p = 0.002), cardio-ankle vascular index (r = 0.365, p < 0.001) and heart rate variability parameters. Multivariate regression analysis revealed that among all of the segments, only intima-media thickness of the carotid bulb was an independent predictor of orthostatic systolic blood pressure change (p = 0.022). CONCLUSION Atherosclerosis of the carotid bulb was associated with severity of orthostatic hypotension, arterial stiffening and cardiac autonomic dysfunction than that of other carotid artery segments.
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Affiliation(s)
- Yusuke Kobayashi
- a Division of Nephrology and Hypertension , Saiseikai Yokohamashi Nanbu Hospital , Yokohama , Japan
- b Department of Internal Medicine , The Kobayashi Medical Clinic , Yokohama , Japan
| | - Hiroaki Ishiguro
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Tetsuya Fujikawa
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
- d Center for Health Service Sciences , Yokohama National University , Yokohama , Japan
| | - Hideo Kobayashi
- b Department of Internal Medicine , The Kobayashi Medical Clinic , Yokohama , Japan
| | - Koichiro Sumida
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Minako Kagimoto
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Yuki Okuyama
- a Division of Nephrology and Hypertension , Saiseikai Yokohamashi Nanbu Hospital , Yokohama , Japan
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Yosuke Ehara
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Mari Katsumata
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Megumi Fujita
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Akira Fujiwara
- e Department of Nephrology and Hypertension , Yokohama City University Medical Center , Yokohama , Japan
| | - Sanae Saka
- e Department of Nephrology and Hypertension , Yokohama City University Medical Center , Yokohama , Japan
| | - Keisuke Yatsu
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Nobuhito Hirawa
- e Department of Nephrology and Hypertension , Yokohama City University Medical Center , Yokohama , Japan
| | - Yoshiyuki Toya
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Gen Yasuda
- e Department of Nephrology and Hypertension , Yokohama City University Medical Center , Yokohama , Japan
| | - Satoshi Umemura
- f Department of Internal Medicine , Yokohama Rosai Hospital , Yokohama , Japan
| | - Kouichi Tamura
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
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8
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Cho T, Higaki H, Hirata M, Hojo H, Ichimura M, Ishii K, Itakura A, Katanuma I, Kohagura J, Nakashima Y, Saito T, Tatematsu Y, Yoshikawa M, Itoh H, Minami R, Nagashima S, Numakura T, Watanabe H, Yoshida M, Yatsu K, Miyoshi S. Summarized Scaling Laws of Plasma Confining Potential Formation and Effects in the Gamma 10 Tandem Mirror. Fusion Science and Technology 2018. [DOI: 10.13182/fst03-a11963560] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Cho
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - H. Higaki
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Hirata
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - H. Hojo
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Ichimura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - K. Ishii
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - A. Itakura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - I. Katanuma
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - J. Kohagura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Nakashima
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - T. Saito
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Tatematsu
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Yoshikawa
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - H. Itoh
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - R. Minami
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - S. Nagashima
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - T. Numakura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - H. Watanabe
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Yoshida
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - K. Yatsu
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - S. Miyoshi
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
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9
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Yoshikawa M, Furukawa T, Kubota Y, Sedo K, Kobayashi T, Takemura Y, Ishii K, Cho T, Yatsu K, Kawamori E, Okamoto Y, Yamaguchi N. Study of Impurity Ions Behavior in The Gamma 10 Plasma. Fusion Science and Technology 2018. [DOI: 10.13182/fst03-a11963592] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Furukawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Kubota
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - K. Sedo
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Kobayashi
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Takemura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - K. Ishii
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Cho
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - E. Kawamori
- High Temperature Plasma Center, University of Tokyo, Tokyo 113-8656, Japan
| | - Y. Okamoto
- Toyota Technological Institute, Tenpaku, Nagoya, Aichi 468-8511, Japan
| | - N. Yamaguchi
- Toyota Technological Institute, Tenpaku, Nagoya, Aichi 468-8511, Japan
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10
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Saito T, Tatematsu Y, Imaizumi Y, Tsuda E, Yasuoka T, Ichimura M, Ishii K, Katanuma I, Yatsu K. Study of The Potential Structure from the Plug-Barrier Cell to the End Plate in Gamma 10. Fusion Science and Technology 2018. [DOI: 10.13182/fst03-a11963586] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Saito
- Plasma Research Center, University of Tsukuba Tsukuba City, Ibaraki 305-8577
| | - Y. Tatematsu
- Plasma Research Center, University of Tsukuba Tsukuba City, Ibaraki 305-8577
| | - Y. Imaizumi
- Plasma Research Center, University of Tsukuba Tsukuba City, Ibaraki 305-8577
| | - E. Tsuda
- Plasma Research Center, University of Tsukuba Tsukuba City, Ibaraki 305-8577
| | - T. Yasuoka
- Plasma Research Center, University of Tsukuba Tsukuba City, Ibaraki 305-8577
| | - M. Ichimura
- Plasma Research Center, University of Tsukuba Tsukuba City, Ibaraki 305-8577
| | - K. Ishii
- Plasma Research Center, University of Tsukuba Tsukuba City, Ibaraki 305-8577
| | - I. Katanuma
- Plasma Research Center, University of Tsukuba Tsukuba City, Ibaraki 305-8577
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba Tsukuba City, Ibaraki 305-8577
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11
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Kobayashi Y, Yatsu K, Nakata-Shimokihara K, Inoue N, Fujikawa T, Hirawa N, Umemura S, Satoh F, Rossi GP, Tamura K. Monozygotic twins discordant for primary aldosteronism: a case report. J Hum Hypertens 2017; 31:754-755. [DOI: 10.1038/jhh.2017.41] [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: 11/09/2022]
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12
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Kobayashi Y, Yatsu K, Nakata-Shimokihara K, Inoue N, Fujikawa T, Hirawa N, Umemura S, Satoh F, Rossi GP, Tamura K. Monozygotic twins discordant for primary aldosteronism: a case report. J Hum Hypertens 2017; 31:760. [PMID: 28974781 DOI: 10.1038/jhh.2017.53] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This corrects the article DOI: 10.1038/jhh.2017.41.
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13
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Kobayashi Y, Fujikawa T, Yatsu K, Iwamoto T, Hirawa N, Kobayashi H, Umemura S, Tamura K. Abstract P492: Lower Body Mass Index is Associated With Arterial Stiffening and Severity of Orthostatic Hypotension in Middle-aged and Older Patients With Abdominal Obesity. Hypertension 2017. [DOI: 10.1161/hyp.70.suppl_1.p492] [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: 11/16/2022]
Abstract
Background:
Recently, patients with both sarcopenia and abdominal obesity are known to exhibit subclinical atherosclerosis and high mortality risk. Sarcopenic obesity is considered to be latent in those without increase in body mass index (BMI) despite having abdominal obesity. We aimed to investigate whether arterial stiffening and severity of orthostatic hypotension, which is the risk of cardiovascular disease, is associated with lower BMI in patients with abdominal obesity.
Methods:
We studied middle-aged and older patients with normal to high BMI (BMI ≥ 18.5) and being treated with life-style related diseases. The patients were divided into 2 groups (with or without abdominal obesity) according to waist circumference (WC) (abdominal obesity: men; WC ≥ 85 cm, women; WC ≥ 90 cm). We measured cardio-vascular ankle index (CAVI) for an index of arterial stiffness. We assessed sit-to-stand test for measuring orthostatic systolic blood pressure (SBP) change.
Results:
One thousand and forty-six patients were included in the study. Mean age of the patients was 68.0 ± 10.1 years (42.5% were men), hypertension dyslipidemia and diabetes mellitus was observed in 83.3%, 74.3% and 20.2% of the patients respectively. There was a significant negative correlation with BMI and CAVI in patients with abdominal obesity (r=-0.309, p<0.001, n=434), whereas no significant association was observed in patients without abdominal obesity (p=N.S., n=612). There was a significant positive correlation with BMI and orthostatic SBP change in patients with abdominal obesity (r=0.213, p<0.001) and in patients without abdominal obesity (r=0.117, P=0.004). Multivariate regression analysis revealed that BMI was an independent determinant of CAVI and orthostatic SBP change in patients with abdominal obesity (p<0.001, p<0.001, respectively), and was an independent determinant of orthostatic SBP change in patients without abdominal obesity (p=0.004).
Conclusion:
In patients with abdominal obesity, lower BMI was an independent determinant of arterial stiffening and severity of orthostatic hypotension. Further investigation by evaluating body composition is necessary and now ongoing to assess the risk of lower BMI in patients with abdominal obesity.
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14
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Wakui H, Sumida K, Fujita M, Ohtomo Y, Ohsawa M, Kobayashi R, Uneda K, Azushima K, Haruhara K, Yatsu K, Hirawa N, Minegishi S, Ishigami T, Umemura S, Tamura K. Enhancement of intrarenal plasma membrane calcium pump isoform 1 expression in chronic angiotensin II-infused mice. Physiol Rep 2017; 5:5/11/e13316. [PMID: 28611155 PMCID: PMC5471448 DOI: 10.14814/phy2.13316] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 05/13/2017] [Accepted: 05/15/2017] [Indexed: 12/24/2022] Open
Abstract
Plasma membrane calcium pump isoform 1 (PMCA1) is encoded by ATPase plasma membrane Ca2+transporting 1 (ATP2B1), the most likely candidate gene responsible for hypertension. Although PMCA1 is highly expressed in the kidney, little is known about regulation of its renal expression in various pathological conditions in vivo. Our study was designed to elucidate regulation of renal PMCA1 expression in mice. We employed three mouse models for kidney disease. These were the unilateral ureteral obstruction (UUO), the remnant kidney using 5/6 nephrectomy, and chronic angiotensin II administration models. Mice were assessed for systolic blood pressure and renal injury in accordance with the damage induced in the specific model. Kidney PMCA1 mRNA levels were measured in all mice. The UUO model showed renal fibrosis but no changes in blood pressure or renal PMCA1 mRNA expression. Similarly, the 5/6 nephrectomy model exhibited declined renal function without changes in blood pressure or renal PMCA1 mRNA expression. In contrast, chronic angiotensin II administration increased albuminuria and blood pressure as well as significantly increasing renal PMCA1 mRNA and protein expression. These results suggest that renal PMCA1 has a role as one of the molecules involved in angiotensin II-induced hypertension and kidney injury.
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Affiliation(s)
- Hiromichi Wakui
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Koichiro Sumida
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Megumi Fujita
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Yuta Ohtomo
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Masato Ohsawa
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Ryu Kobayashi
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Kazushi Uneda
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Kengo Azushima
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Kotaro Haruhara
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Keisuke Yatsu
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Nobuhito Hirawa
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Shintaro Minegishi
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Tomoaki Ishigami
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Satoshi Umemura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Kouichi Tamura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
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15
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Katsumata M, Hirawa N, Sumida K, Kagimoto M, Ehara Y, Okuyama Y, Fujita M, Fujiwara A, Kobayashi M, Kobayashi Y, Yamamoto Y, Saka S, Yatsu K, Fujikawa T, Toya Y, Yasuda G, Tamura K, Umemura S. Effects of tolvaptan in patients with chronic kidney disease and chronic heart failure. Clin Exp Nephrol 2017; 21:858-865. [PMID: 28190113 PMCID: PMC5648735 DOI: 10.1007/s10157-016-1379-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 12/30/2016] [Indexed: 11/24/2022]
Abstract
BACKGROUND Tolvaptan, a vasopressin V2 receptor blocker, has a diuretic effect for patients with heart failure. However, there were a few data concerning the effects of tolvaptan in patients with chronic kidney disease (CKD). METHODS We retrospectively analyzed 21 patients with chronic heart failure and CKD. Tolvaptan was co-administered with other diuretics in-use, every day. We compared clinical parameters before and after the treatments with tolvaptan. Furthermore, we examined the correlations between baseline data and the change of body weight. RESULTS Tolvaptan decreased the body weight and increased the urine volume (p = 0.001). The urine osmolality significantly decreased throughout the study period. Urinary Na/Cr ratio and FENa changed significantly after 4 h, and more remarkable after 8 h (p = 0.003, both). Serum creatinine increased slightly after 1 week of treatment (p = 0.012). The alteration of body weight within the study period correlated negatively with the baseline urine osmolality (r = -0.479, p = 0.038), the baseline urine volume (r = -0.48, p = 0.028), and the baseline inferior vena cava diameter (IVCD) (r = -0.622, p = 0.017). Hyponatremia was improved to the normal value, and the augmentations of the sodium concentration were negatively associated with the basal sodium levels (p = 0.01, r = -0.546). CONCLUSIONS Tolvaptan is effective in increasing diuresis and improved hyponatremia, even in patients with CKD. The baseline urine osmolality, urine volume, and IVCD may be useful predictors for diuretic effects of tolvaptan.
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Affiliation(s)
- Mari Katsumata
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024, Japan
| | - Nobuhito Hirawa
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024, Japan
| | - Koichiro Sumida
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Minako Kagimoto
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Yosuke Ehara
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Yuki Okuyama
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Megumi Fujita
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024, Japan
| | - Akira Fujiwara
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024, Japan
| | - Mayumi Kobayashi
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024, Japan
| | - Yusuke Kobayashi
- Department of Nephrology, Yokosuka City Hospital, Yokosuka, Japan
| | - Yuichiro Yamamoto
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024, Japan
| | - Sanae Saka
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024, Japan
| | - Keisuke Yatsu
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Tetsuya Fujikawa
- Center for Health Service Sciences, Yokohama National University, Yokohama, Japan
| | - Yoshiyuki Toya
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Gen Yasuda
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024, Japan
| | - Kouichi Tamura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
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16
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Kobayashi Y, Fujikawa T, Kobayashi H, Sumida K, Suzuki S, Kagimoto M, Okuyama Y, Ehara Y, Katsumata M, Fujita M, Fujiwara A, Saka S, Yatsu K, Hashimoto T, Kuji T, Hirawa N, Toya Y, Yasuda G, Umemura S. Relationship between Arterial Stiffness and Blood Pressure Drop During the Sit-to-stand Test in Patients with Diabetes Mellitus. J Atheroscler Thromb 2016; 24:147-156. [PMID: 27453255 PMCID: PMC5305675 DOI: 10.5551/jat.34645] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 01/26/2023] Open
Abstract
Aim: Patients with orthostatic hypotension (OH) have high arterial stiffness. Patients with diabetes mellitus (DM) often have cardiac autonomic neuropathy that leads to OH; however, whether OH is an indicator of arterial stiffness progression is unclear. We aimed to investigate whether the cardioankle vascular index (CAVI) varies between DM patients with and without OH using the sit-to-stand test (STST). Methods: One hundred and fifty-nine patients with DM underwent CAVI assessment and blood pressure (BP) and heart rate change evaluation during the STST. OH was defined as a decline in systolic BP (SBP) and/or diastolic BP of at least 20 mmHg or 10 mmHg, respectively, in the initial and late upright positions compared with that in the sitting position. Results: OH was diagnosed in 42 patients (26.4%). DM patients with OH had significantly higher CAVI (9.36 ± 1.15 versus 8.89 ± 1.18, p = 0.026) than those without OH. CAVI was significantly inversely correlated with systolic and diastolic BP changes (R = −0.347, p <0.001 and R = −0.314, p <0.001, respectively) in the initial upright position. Multivariate regression analysis revealed that age, SBP changes, and low frequency component in the initial upright position were independent determinants of CAVI. Conclusion: Patients with DM having large BP drops occurring when moving from sitting to standing have high arterial stiffness. A significant BP drop during the STST necessitates careful evaluation of advanced arterial stiffness in patient with DM.
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17
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Minegishi S, Ishigami T, Kino T, Chen L, Nakashima-Sasaki R, Araki N, Yatsu K, Fujita M, Umemura S. An isoform of Nedd4-2 is critically involved in the renal adaptation to high salt intake in mice. Sci Rep 2016; 6:27137. [PMID: 27256588 PMCID: PMC4891730 DOI: 10.1038/srep27137] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [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: 12/06/2015] [Accepted: 05/13/2016] [Indexed: 11/14/2022] Open
Abstract
Epithelial sodium channels (ENaCs) play critical roles in the maintenance of fluid and electrolyte homeostasis, and their genetic abnormalities cause one type of hereditary salt-sensitive hypertension, Liddle syndrome. As we reported previously, both human and rodent Nedd4L/Nedd4-2 showed molecular diversity, with and without a C2 domain in their N-terminal. Nedd4L/Nedd4-2 isoforms with a C2 domain are hypothesized to be related closely to ubiquitination of ENaCs. We generated Nedd4-2 C2 domain knockout mice. We demonstrate here that loss of Nedd4-2 C2 isoform causes salt-sensitive hypertension under conditions of a high dietary salt intake in vivo. The knockout mice had reduced urinary sodium excretion, osmotic pressure and increased water intake and urine volume with marked dilatation of cortical tubules while receiving a high salt diet. To the contrary, there was no difference in metabolic data between wild-type and knockout mice receiving a normal control diet. In the absence of Nedd4-2 C2 domain, a high salt intake accelerated ENaC expression. Coimmunoprecipitation studies revealed suppressed ubiquitination for ENaC with a high salt intake. Taken together, our findings demonstrate that during a high oral salt intake the Nedd4-2 C2 protein plays a pivotal role in maintaining adaptive salt handling in the kidney.
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Affiliation(s)
- Shintaro Minegishi
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardio-Renal Medicine
| | - Tomoaki Ishigami
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardio-Renal Medicine
| | - Tabito Kino
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardio-Renal Medicine
| | - Lin Chen
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardio-Renal Medicine
| | - Rie Nakashima-Sasaki
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardio-Renal Medicine
| | - Naomi Araki
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardio-Renal Medicine
| | - Keisuke Yatsu
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardio-Renal Medicine
| | - Megumi Fujita
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardio-Renal Medicine
| | - Satoshi Umemura
- Yokohama City University Graduate School of Medicine, Department of Medical Science and Cardio-Renal Medicine
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18
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Saka S, Hirawa N, Oka A, Yatsu K, Hirukawa T, Yamamoto R, Matsusaka T, Imai E, Narita I, Endoh M, Ichikawa I, Umemura S, Inoko H. Genome-wide association study of IgA nephropathy using 23 465 microsatellite markers in a Japanese population. J Hum Genet 2015. [PMID: 26202575 DOI: 10.1038/jhg.2015.88] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Immunoglobulin A nephropathy (IgAN) is the most common form of primary glomerulonephritis in many parts of the world. Although previous genome-wide association studies (GWAS) identified the major susceptibility loci for IgAN, the causal genes currently remain unknown. We performed a GWAS using 23 465 microsatellite (MS) markers to identify genes related to IgAN in a Japanese population. A pooled sample analysis was conducted in three-stage screenings of three independent case-control populations, and after the final step of individual typing, 11 markers survived. Of these, we focused on two regions on 6p21 and 12q21 because they (i) showed the strongest relationship with IgAN, and (ii) appeared to be highly relevant to IgAN in view of several previous studies. These regions contained the HLA, TSPAN8 and PTPRR genes. This study on GWAS, using >20 000 MS markers, provides a new approach regarding susceptible genes for IgAN for investigators seeking new tools for the prevention and treatment of IgAN.
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Affiliation(s)
- Sanae Saka
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University, Graduate School of Medicine, Yokohama, Japan.,Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Nobuhito Hirawa
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Akira Oka
- The Institute of Medical Science, Tokai University, Isehara, Japan
| | - Keisuke Yatsu
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University, Graduate School of Medicine, Yokohama, Japan
| | - Takeshi Hirukawa
- Division of Nephrology, Endocrinology and Metabolism, Department of Internal Medicine, Tokai University School of Medicine, Isehara, Japan
| | - Ryohei Yamamoto
- Department of Nephrology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Taiji Matsusaka
- Division of Nephrology, Endocrinology and Metabolism, Department of Internal Medicine, Tokai University School of Medicine, Isehara, Japan
| | - Enyu Imai
- Nakayamadera Imai Clinic, Takarazuka, Japan.,Department of Nephrology, Fujita Health University, Toyoake, Japan
| | - Ichiei Narita
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Masayuki Endoh
- Division of Nephrology, Endocrinology and Metabolism, Department of Internal Medicine, Tokai University School of Medicine, Isehara, Japan
| | - Iekuni Ichikawa
- Department of Ethics, Shinshu Univeristy, Nagano, Japan.,Departments of Pediatrics and Medicine, Vanderbilt University, Nashville, TN, USA
| | - Satoshi Umemura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University, Graduate School of Medicine, Yokohama, Japan
| | - Hidetoshi Inoko
- The Institute of Medical Science, Tokai University, Isehara, Japan
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19
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Fujiwara A, Hirawa N, Kobayashi Y, Yatsu K, Katsumata M, Ehara Y, Okuyama Y, Yutoh J, Kaneda T, Fujita M, Yamamoto Y, Saka S, Toya Y, Yasuda G, Umemura S. Efficacy of cyclosporine combination therapy for new-onset minimal change nephrotic syndrome in adults. Clin Exp Nephrol 2014; 19:240-6. [PMID: 24771147 PMCID: PMC4412585 DOI: 10.1007/s10157-014-0975-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 04/10/2014] [Indexed: 11/28/2022]
Abstract
Background Cyclosporine and prednisolone combination therapy has been used in the treatment of minimal change nephrotic syndrome (MCNS). However, few studies have evaluated the efficacy of cyclosporine combined with intravenous methylprednisolone pulse therapy (MPT) as a first-line treatment for new-onset MCNS. We conducted a retrospective clinical study to evaluate the efficacy and safety of cyclosporine combined with MPT and oral prednisolone for new-onset MCNS in adults. Methods Forty-six adult patients with biopsy-proven MCNS were analyzed retrospectively. This study included three groups. Group 1 (n = 17) was treated with intravenous MPT (0.5 or 1.0 g/day for 3 days) followed by oral cyclosporine (2–3 mg/kg/day) and prednisolone (30 mg/day). Group 2 (n = 15) was treated with intravenous MPT followed by oral prednisolone (0.4–0.8 mg/kg/day). Group 3 (n = 14) was treated with oral prednisolone (0.6–1.0 mg/kg/day) alone. Results The length of hospital stay was the shortest in Group 1 (P < 0.001). The mean duration to achieve <20 mg/day of prednisolone was also the shortest in Group 1 (P < 0.05). Complete remission rates were 100 % in Group 1, 85.7 % in Group 2, and 69.2 % in Group 3 during the 9-month follow-up (P = 0.073). The rate of adverse effects caused by prednisolone was less in Group 1 (P < 0.05). Multivariate analysis revealed that the independent determinants of durations of remission were the selectivity index (P = 0.004), eGFR (P = 0.001) and the use of cyclosporine (P = 0.045). Conclusions Combination therapy with cyclosporine may be a beneficial treatment option for new-onset MCNS in adults because of its clinical efficacy and safety.
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Affiliation(s)
- Akira Fujiwara
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Nobuhito Hirawa
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024 Japan
| | - Yusuke Kobayashi
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Keisuke Yatsu
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Mari Katsumata
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024 Japan
| | - Yohsuke Ehara
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024 Japan
| | - Yuki Okuyama
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Jun Yutoh
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024 Japan
| | - Tomoko Kaneda
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024 Japan
| | - Megumi Fujita
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Yuichiro Yamamoto
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024 Japan
| | - Sanae Saka
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024 Japan
| | - Yoshiyuki Toya
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Gen Yasuda
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024 Japan
| | - Satoshi Umemura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
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20
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Maeda A, Tamura K, Wakui H, Dejima T, Ohsawa M, Azushima K, Kanaoka T, Uneda K, Matsuda M, Yamashita A, Miyazaki N, Yatsu K, Hirawa N, Toya Y, Umemura S. Angiotensin receptor-binding protein ATRAP/Agtrap inhibits metabolic dysfunction with visceral obesity. J Am Heart Assoc 2013; 2:e000312. [PMID: 23902639 PMCID: PMC3828814 DOI: 10.1161/jaha.113.000312] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Metabolic disorders with visceral obesity have become a major medical problem associated with the development of hypertension, type 2 diabetes, and dyslipidemia and, ultimately, life-threatening cardiovascular and renal diseases. Adipose tissue dysfunction has been proposed as the cause of visceral obesity-related metabolic disorders, moving the tissue toward a proinflammatory phenotype. METHODS AND RESULTS Here we first report that adipose tissues from patients and mice with metabolic disorders exhibit decreased expression of ATRAP/Agtrap, which is a specific binding modulator of the angiotensin II type 1 receptor, despite its abundant expression in adipose tissues from normal human and control mice. Subsequently, to examine a functional role of ATRAP in the pathophysiology of metabolic disorders, we produced homozygous ATRAP deficient (Agtrap(-/-)) mice, which exhibited largely normal physiological phenotype at baseline. Under dietary high fat loading, Agtrap(-/-) mice displayed systemic metabolic dysfunction, characterized by an increased accumulation of pad fat, hypertension, dyslipidemia, and insulin resistance, along with adipose tissue inflammation. Conversely, subcutaneous transplantation of donor fat pads overexpressing ATRAP derived from Agtrap transgenic mice to Agtrap(-/-) recipient mice improved the systemic metabolic dysfunction. CONCLUSIONS These results demonstrate that Agtrap(-/-) mice are an effective model of metabolic disorders with visceral obesity and constitute evidence that ATRAP plays a protective role against insulin resistance, suggesting a new therapeutic target in metabolic disorders. Identification of ATRAP as a novel receptor binding modulator of adipose tissue inflammation not only has cardiovascular significance but may have generalized implication in the regulation of tissue function.
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Affiliation(s)
- Akinobu Maeda
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
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21
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Clotet S, Soler MJ, Rebull M, Pascual J, Riera M, Kucher AG, Parastaeva MM, Beresneva ON, Ivanova GT, Zaraysky MI, Artemeva AV, Kaukov IG, Smirnov AV, Roszkowska-Chojecka M, Walkowska A, Gawrys O, Olszynski K, Kompanowska-Jezierska E, Walkowska A, Roszkowska-Chojecka M, Gawrys O, Baranowska I, Kompanowska-Jezierska EM, Roszkowska-Chojecka MM, Dobrowolski L, Badzynska B, Olszynski KH, Lipkowski AW, Sadowski J, Kobayashi Y, Hirawa N, Okuyama Y, Fujita M, Fujiwara A, Saka S, Yatsu K, Toya Y, Yasuda G, Umemura S, Oliveira-Sales EB, Maquigussa E, Semedo P, Pereira LG, Camara NOS, Bergamaschi CT, Campos RR, Boim MA, Potenza MA, Sirolli V, Addabbo F, Di Pietro N, Amoroso L, Pipino C, Pandolfi A, Montagnani M, Bonomini M, Quiroz YJ, Rivero M, Yaguas K, Moran L, Rodriguez-Iturbe B, Lee J, Heo NJ, Kim S, Joo KW, Han JS, Rapp W, Raab S, Sprecher U, Funk J, Apfel CM, Conde-Knape K, Qin Y, Mou L, Li X, Li X, Ilatovskaya ME, Andreev-Andrievsky AA, Pozdnev VF, Iliyn AV, Medvedeva NA, Malyszko J, Koc-Zorawska E, Zbroch E, Malyszko JS, Zorawski M, Mysliwiec M, Wakui H, Tamura K, Masuda SI, Tsurumi-Ikeya Y, Fujita M, Kanaoka T, Fujikawa T, Suzuki S, Kobayashi Y, Yabana M, Toya Y, Umemura S, Iimuro S, Imai E, Matsuo S, Watanabe T, Nitta K, Akizawa T, Makino H, Ohashi Y, Hishida A. Hypertension - experimental models. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft128] [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: 11/12/2022] Open
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22
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Kobayashi Y, Hirawa N, Tabara Y, Muraoka H, Fujita M, Miyazaki N, Fujiwara A, Ichikawa Y, Yamamoto Y, Ichihara N, Saka S, Wakui H, Yoshida SI, Yatsu K, Toya Y, Yasuda G, Kohara K, Kita Y, Takei K, Goshima Y, Ishikawa Y, Ueshima H, Miki T, Umemura S. Mice Lacking Hypertension Candidate Gene ATP2B1 in Vascular Smooth Muscle Cells Show Significant Blood Pressure Elevation. Hypertension 2012; 59:854-60. [DOI: 10.1161/hypertensionaha.110.165068] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Yusuke Kobayashi
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Nobuhito Hirawa
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Yasuharu Tabara
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Hidenori Muraoka
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Megumi Fujita
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Nobuko Miyazaki
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Akira Fujiwara
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Yasuhiro Ichikawa
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Yuichiro Yamamoto
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Naoaki Ichihara
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Sanae Saka
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Hiromichi Wakui
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Shin-ichiro Yoshida
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Keisuke Yatsu
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Yoshiyuki Toya
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Gen Yasuda
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Katsuhiko Kohara
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Yoshikuni Kita
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Kohtaro Takei
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Yoshio Goshima
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Yoshihiro Ishikawa
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Hirotsugu Ueshima
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Tetsuro Miki
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Satoshi Umemura
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
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Yasuda G, Yatsu K, Yamamoto Y, Hirawa N. Effects of Carvedilol as Third-Line Add-On Therapy on Blood Pressure and Glucose Metabolism in Type 2 Diabetic Patients with Chronic Renal Disease Stage 3 and Above. Kidney Blood Press Res 2012; 36:131-8. [DOI: 10.1159/000341491] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/21/2012] [Indexed: 11/19/2022] Open
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Yamamoto Y, Hirawa N, Yamaguchi S, Ogawa N, Takeda H, Shibuya K, Kawahara K, Kojima H, Dobashi Y, Fujita M, Azusima K, Miyazaki N, Kobayashi M, Kobayashi C, Fujiwara A, Yuto J, Saka S, Yatsu K, Toya Y, Yasuda G, Ohnishi T, Umemura S. Long-term efficacy and safety of the small-sized β2-microglobulin adsorption column for dialysis-related amyloidosis. Ther Apher Dial 2011; 15:466-74. [PMID: 21974700 DOI: 10.1111/j.1744-9987.2011.00937.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dialysis-related amyloidosis (DRA) is one of the major complications often seen in long-term dialysis patients, and is one of the factors that decreases quality of life. β2-microglobulin (β2-m) is considered to be a major pathogenic factor in dialysis-related amyloidosis. The Lixelle adsorbent column, with various capacities, has been developed to adsorb β2-m from the circulating blood of patients with dialysis-related amyloidosis. Using a minimum type of β2-m-adsorbing column (Lixelle S-15), we evaluated its therapeutic efficacy and safety in dialysis patients. Seventeen hemodialysis patients with DRA were treated with the S-15 column for one year. Treatment was performed three times a week in this study. During the study period, pinch strength, visual analog scale for joint pain, and activities of daily living were evaluated every three months, and blood sampling was performed every six months. After one year's treatment with the S-15 column, the β2-m level decreased from 29.3±9.6mg/L to 24.7±5.1mg/L (P<0.05), and the high sensitive C-reactive protein level decreased from 2996±4380ng/mL to 1292±1774ng/mL. After one year of S-15 column use, pinch strength increased from 5.9±3.0pounds to 7.2±3.2pounds (P<0.05), and the visual analog scale for joint pain and activities of daily living score also improved. Long-term use of the Lixelle S-15 column is safe and effective for improvement of quality of life in chronic dialysis patients. Improvement of chronic inflammation may be one of the mechanisms through which the beneficial effects of the column is effected.
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Affiliation(s)
- Yuichiro Yamamoto
- Division of Nephrology, Dialysis and Apheresis, Yokohama City University Medical Center, 45-7, Urafune-cho, Minami-ku, Yokohama 232-0024, Japan
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Kobayashi M, Hirawa N, Morita S, Yatsu K, Kobayashi Y, Yamamoto Y, Saka S, Toya Y, Yasuda G, Umemura S. Silent Brain Infarction and Rapid Decline of Kidney Function in Patients With CKD: A Prospective Cohort Study. Am J Kidney Dis 2010; 56:468-76. [DOI: 10.1053/j.ajkd.2010.03.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2009] [Accepted: 03/01/2010] [Indexed: 11/11/2022]
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26
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Akiyama M, Yatsu K, Ota M, Katsuyama Y, Kashiwagi K, Mabuchi F, Iijima H, Kawase K, Yamamoto T, Nakamura M, Negi A, Sagara T, Kumagai N, Nishida T, Inatani M, Tanihara H, Ohno S, Inoko H, Mizuki N. Microsatellite analysis of the GLC1B locus on chromosome 2 points to NCK2 as a new candidate gene for normal tension glaucoma. Br J Ophthalmol 2008; 92:1293-6. [DOI: 10.1136/bjo.2008.139980] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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27
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Kobayashi M, Hirawa N, Yatsu K, Kobayashi Y, Yamamoto Y, Saka S, Andoh D, Toya Y, Yasuda G, Umemura S. Relationship between silent brain infarction and chronic kidney disease. Nephrol Dial Transplant 2008; 24:201-7. [PMID: 18697797 PMCID: PMC2639313 DOI: 10.1093/ndt/gfn419] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [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: 11/13/2022] Open
Abstract
Background. The presence of silent brain infarction (SBI) increases the risk of symptomatic stroke and dementia. The association between SBI and chronic kidney disease (CKD) has not been clarified. Moreover, little is known about what factors are related to SBI in CKD patients and whether the prevalence of SBI differs in CKD stage or cause of CKD. Methods. This is a cross-sectional study. A total of 375 subjects—335 with CKD and 40 with essential hypertension—were included. All subjects underwent magnetic resonance imaging (MRI) of the brain to detect SBI. Glomerular filtration rate (GFR) was estimated using Modification of Diet in Renal Disease equation, and cardiovascular risk factors were examined. Results. The prevalence of SBI was 56.5% in all subjects. Among causes of CKD, hypertensive nephrosclerosis had a strong association with SBI. According to the estimated GFR (eGFR) stage, the more severe the stage of eGFR, the higher the prevalence of SBI (age-adjusted odds ratio [95% confidence interval] for eGFR 30–59, 15–29 and <15 versus ≥60 mL/min/1.73 m2: 1.34 [0.68–1.99], 1.94 [1.30–2.57] and 2.51 [1.91–3.10]). In multivariate logistic analysis, eGFR was related to SBI independently, in addition to age and blood pressure (P = 0.025). However, other traditional and non-traditional risk factors were not. Conclusion. There was an independent association between eGFR and SBI. CKD patients should receive active detection of SBI and more intensive preventive management, especially for hypertension, should be needed in CKD patients to prevent SBI.
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Affiliation(s)
- Mayumi Kobayashi
- Department of Medical Science, Division of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama City University Graduate School of Medicine and School of Medicine, Yokohama, Japan
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28
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Yasuda G, Yatsu K, Ando D, Saka S, Endo T, Hirawa N, Umemura S. PO23-748 EFFECTS OF ATORVASTATIN VERSUS PROBUCOL ON LOW-DENSITY LIPOPROTEIN SUBTYPE DISTRIBUTION AND RENAL FUNCTION IN HYPERLIPIDEMIC PATIENTS WITHNON-DIABETIC NEPHROPATHY. ATHEROSCLEROSIS SUPP 2007. [DOI: 10.1016/s1567-5688(07)71758-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Yatsu K, Mizuki N, Hirawa N, Oka A, Itoh N, Yamane T, Ogawa M, Shiwa T, Tabara Y, Ohno S, Soma M, Hata A, Nakao K, Ueshima H, Ogihara T, Tomoike H, Miki T, Kimura A, Mano S, Kulski JK, Umemura S, Inoko H. High-resolution mapping for essential hypertension using microsatellite markers. Hypertension 2007; 49:446-52. [PMID: 17242298 DOI: 10.1161/01.hyp.0000257256.77680.02] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
During the past decade, considerable efforts and resources have been devoted to elucidating the multiple genetic and environmental determinants responsible for hypertension and its associated cardiovascular diseases. The success of positional cloning, fine mapping, and linkage analysis based on whole-genome screening, however, has been limited in identifying multiple genetic determinants affecting diseases, suggesting that new research strategies for genome-wide typing may be helpful. Disease association (case-control) studies using microsatellite markers, distributed every 150 kb across the human genome, may have some advantages over linkage, candidate, and single nucleotide polymorphism typing methods in terms of statistical power and linkage disequilibrium for finding genomic regions harboring candidate disease genes, although it is not proven. We have carried out genome-wide mapping using 18,977 microsatellite markers in a Japanese population composed of 385 hypertensive patients and 385 normotensive control subjects. Pooled sample analysis was conducted in a 3-stage genomic screen of 3 independent case-control populations, and 54 markers were extracted from the original 18,977 microsatellite markers. As a final step, each single positive marker was confirmed by individual typing, and only 19 markers passed this test. We identified 19 allelic loci that were significantly different between the cases of essential hypertension and the controls.
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Affiliation(s)
- Keisuke Yatsu
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
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30
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Tsuchiya K, Akiba M, Azechi H, Fujii T, Fujita T, Fujiwara M, Hamamatsu K, Hashizume H, Hayashi N, Horiike H, Hosogane N, Ichimura M, Ida K, Ikeda Y, Imai T, Inoue N, Ishida S, Itoh S, Kamada Y, Kawashima H, Kikuchi M, Kimura A, Kizu K, Kubo H, Kudo Y, Kurihara K, Kurita G, Kuriyama M, Masaki K, Matsukawa M, Matsuoka M, Miura Y, Miura Y, Miya N, Morioka A, Nakamura K, Ninomiya H, Nishimura A, Okano K, Okuno K, Sagara A, Sakamoto M, Sakurai S, Sato K, Shimada R, Shimizu A, Suzuki T, Takahashi H, Takase Y, Takechi M, Tamai H, Tanaka S, Tsutsui H, Uesugi Y, Yatsu K, Yoshida N. Engineering design and control scenario for steady-state high-beta operation in National Centralized Tokamak. Fusion Engineering and Design 2006. [DOI: 10.1016/j.fusengdes.2005.08.066] [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] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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31
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Katanuma I, Tatematsu Y, Ishii K, Saito T, Ichimura M, Nakashima Y, Yatsu K. A Single Minimum-B Tandem Mirror. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- I. Katanuma
- Plasma Research Center, University of Tsukuba 1-1-1 Tennoudai, Tsukuba 305-8577, Japan
| | - Y. Tatematsu
- Plasma Research Center, University of Tsukuba 1-1-1 Tennoudai, Tsukuba 305-8577, Japan
| | - K. Ishii
- Plasma Research Center, University of Tsukuba 1-1-1 Tennoudai, Tsukuba 305-8577, Japan
| | - T. Saito
- Plasma Research Center, University of Tsukuba 1-1-1 Tennoudai, Tsukuba 305-8577, Japan
| | - M. Ichimura
- Plasma Research Center, University of Tsukuba 1-1-1 Tennoudai, Tsukuba 305-8577, Japan
| | - Y. Nakashima
- Plasma Research Center, University of Tsukuba 1-1-1 Tennoudai, Tsukuba 305-8577, Japan
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba 1-1-1 Tennoudai, Tsukuba 305-8577, Japan
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32
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Kakimoto S, Kano H, Ichimura M, Higaki H, Saosaki S, Yamaguchi Y, Hojo H, Watanabe T, Yatsu K. Production of High Energy Ions by High Harmonic Fast Waves in the Gamma10 Tandem Mirror. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- S. Kakimoto
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - H. Kano
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Ichimura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - H. Higaki
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - S. Saosaki
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Yamaguchi
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - H. Hojo
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Watanabe
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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33
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Hirata M, Nagashima S, Cho T, Kohagura J, Yoshida M, Ito H, Tokioka S, Numakura T, Minami R, Nakashima Y, Kondoh T, Yatsu K, Miyoshi S. A Novel Electrostatic Ion-Current Absolute-Value Detector Under Circumstances with Simultaneous Electron Incidence by The Use of a Proposed “Self-Collection” Method for Secondary Electron Emission. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963608] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Hirata
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - S. Nagashima
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - T. Cho
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - J. Kohagura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Yoshida
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - H. Ito
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - S. Tokioka
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - T. Numakura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - R. Minami
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Nakashima
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - T. Kondoh
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
- Japan Atomic Energy Research Institute, Naka, Ibaraki 311-0193, Japan
| | - K. Yatsu
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - S. Miyoshi
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
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34
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Nakashima Y, Cho T, Fukasawa T, Higaki H, Hirata M, Hojo H, Ichimura M, Ishii K, Ishimoto Y, Islam MK, Itakura A, Ito T, Katanuma I, Kobayashi S, Kohagura J, Kubota Y, Minami R, Numakura T, Saito T, Saosaki BS, Takemura Y, Tatematsu Y, Yoshida M, Yoshikawa M, Yatsu K. Recent Results of High Density Experiments in the Gamma 10 Tandem Mirror. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963580] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y. Nakashima
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - T. Cho
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - T. Fukasawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - H. Higaki
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - M. Hirata
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - H. Hojo
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - M. Ichimura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - K. Ishii
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - Y. Ishimoto
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - M. K. Islam
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - A. Itakura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - T. Ito
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - I. Katanuma
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - S. Kobayashi
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
- Institute of Advanced of Energy, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - J. Kohagura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - Y. Kubota
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - R. Minami
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - T. Numakura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - T. Saito
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - B. S. Saosaki
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - Y. Takemura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - Y. Tatematsu
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - M. Yoshida
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - M. Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
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Kojima A, Ishii K, Takemura Y, Hagisawa K, Itakura A, Ichimura M, Yatsu K. Development of Alfvén Ion Cyclotron Fluctuation Measurement by Use of a Gold Neutral Beam Probe in the Tandem Mirror Gamma10. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- A. Kojima
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - K. Ishii
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Takemura
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - K. Hagisawa
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - A. Itakura
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Ichimura
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
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36
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Ishii K, Takemura Y, Fueki A, Shimoo M, Tsutsui K, Hagisawa K, Kojima A, Katanuma I, Saito T, Itakura A, Yatsu K. Radial Potential Control for Plasma Confinement in the Tandem Mirror GAMMA 10. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- K. Ishii
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - Y. Takemura
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - A. Fueki
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - M. Shimoo
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - K. Tsutsui
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - K. Hagisawa
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - A. Kojima
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - I. Katanuma
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - T. Saito
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - A. Itakura
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
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37
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Minami R, Cho T, Numakura T, Kohagura J, Hirata M, Watanabe H, Ichimura M, Yatsu K, Miyoshi S. Analyses of Temporally and Spatially Resolved Plasma Behavior Using X-Ray Data in a Single Plasma Discharge on Gamma 10. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- R. Minami
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - T. Cho
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - T. Numakura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - J. Kohagura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Hirata
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - H. Watanabe
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Ichimura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - K. Yatsu
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - S. Miyoshi
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
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38
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Yoshida M, Cho T, Hirata M, Nagashima S, Ito H, Kohagura J, Yatsu K, Miyoshi S. Relation of the Spatial Profile of Ion Confining Potentials with the Improvement in Plasma Confinement Using Novel Ion-Energy Spectrometer Arrays in Gamma 10. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963617] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Yoshida
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - T. Cho
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Hirata
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - S. Nagashima
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - H. Ito
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - J. Kohagura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - K. Yatsu
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - S. Miyoshi
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
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39
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Numakura T, Cho T, Kohagura J, Hirata M, Minami R, Yatsu K, Miyoshi S. Effects of Thermal-Barrier Potentials on the Central-Cell Electron Energy Confinement. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963599] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Numakura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - T. Cho
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - J. Kohagura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Hirata
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - R. Minami
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - K. Yatsu
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - S. Miyoshi
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
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40
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Islam MK, Nakashima Y, Natori T, Ishimoto Y, Sato D, Wada A, Fukasawa T, Watanabe K, Ogita T, Kobayashi S, Katanuma I, Yatsu K. Edge-Plasma Behavior in the Asymmetric Region of Minimum-B Anchor Cell in the Gamma10 Tandem Mirror. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963588] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. K. Islam
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Nakashima
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Natori
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Ishimoto
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - D. Sato
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - A. Wada
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Fukasawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - K. Watanabe
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Ogita
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - S. Kobayashi
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - I. Katanuma
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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41
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Ichimura M, Higaki H, Saosaki S, Kakimoto S, Yamaguchi Y, Horinouchi K, Hojo H, Yatsu K. Plasma Production and Heating with ICRF in the Gamma 10 Tandem Mirror. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963565] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Ichimura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - H. Higaki
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - S. Saosaki
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - S. Kakimoto
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Yamaguchi
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - K. Horinouchi
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - H. Hojo
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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42
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Itakura A, Hirai T, Hojo H, Kohagura J, Shima Y, Tsunoda S, Yoshikawa M, Yatsu K. Ultrashort-Pulse Reflectometry in the Gamma 10 Device. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- A. Itakura
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - T. Hirai
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - H. Hojo
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - J. Kohagura
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - Y. Shima
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - S. Tsunoda
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - M. Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
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43
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Tatematsu Y, Saito T, Abe H, Nishida K, Imaizumi Y, Yokoyama E, Tsuda E, Yasuoka T, Katanuma I, Yatsu K. Axial and Radial Heat Flows Induced by Ecrh in the Gamma 10 Tandem Mirror. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y. Tatematsu
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Saito
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - H. Abe
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - K. Nishida
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Imaizumi
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - E. Yokoyama
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - E. Tsuda
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Yasuoka
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - I. Katanuma
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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44
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Takemura Y, Ishii K, Fueki A, Hagisawa K, Kojima A, Itakura A, Yatsu K. Measurement of Plasma Density Using a Gold Film Detector in the Inner Mirror Throat of the Gamma10 Tandem Mirror. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y. Takemura
- Plasma Research Center, University of Tsukuba, Tsukuba City, Ibaraki, 305-8577, Japan
| | - K. Ishii
- Plasma Research Center, University of Tsukuba, Tsukuba City, Ibaraki, 305-8577, Japan
| | - A. Fueki
- Plasma Research Center, University of Tsukuba, Tsukuba City, Ibaraki, 305-8577, Japan
| | - K. Hagisawa
- Plasma Research Center, University of Tsukuba, Tsukuba City, Ibaraki, 305-8577, Japan
| | - A. Kojima
- Plasma Research Center, University of Tsukuba, Tsukuba City, Ibaraki, 305-8577, Japan
| | - A. Itakura
- Plasma Research Center, University of Tsukuba, Tsukuba City, Ibaraki, 305-8577, Japan
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba, Tsukuba City, Ibaraki, 305-8577, Japan
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45
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Higaki H, Ichimura M, Kadoya K, Saosaki S, Kano H, Kakimoto S, Yamaguchi Y, Horinouchi K, Hojo H, Yatsu K. Excitation of the Low Frequency Slow Alfvén Waves Associated With the Alfvén Ion Cyclotron Waves in the Gamma 10 Tandem Mirror. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963596] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- H. Higaki
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, Ibaraki 305-8577 Japan tel:+81-298-53-7473
| | - M. Ichimura
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, Ibaraki 305-8577 Japan tel:+81-298-53-7473
| | - K. Kadoya
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, Ibaraki 305-8577 Japan tel:+81-298-53-7473
| | - S. Saosaki
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, Ibaraki 305-8577 Japan tel:+81-298-53-7473
| | - H. Kano
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, Ibaraki 305-8577 Japan tel:+81-298-53-7473
| | - S. Kakimoto
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, Ibaraki 305-8577 Japan tel:+81-298-53-7473
| | - Y. Yamaguchi
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, Ibaraki 305-8577 Japan tel:+81-298-53-7473
| | - K. Horinouchi
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, Ibaraki 305-8577 Japan tel:+81-298-53-7473
| | - H. Hojo
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, Ibaraki 305-8577 Japan tel:+81-298-53-7473
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, Ibaraki 305-8577 Japan tel:+81-298-53-7473
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46
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Kohagura J, Cho T, Hirata M, Numakura T, Minami R, Watanabe H, Yoshida M, Nagashima S, Ito H, Yatsu K, Miyoshi S, Kondoh T, Hori J, Nishitani T. Effects of Fusion Produced Neutrons on Semiconductor Detectors. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- J. Kohagura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - T. Cho
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Hirata
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - T. Numakura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - R. Minami
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - H. Watanabe
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Yoshida
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - S. Nagashima
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - H. Ito
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - K. Yatsu
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - S. Miyoshi
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - T. Kondoh
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
- Japan Atomic Energy Research Institute, Ibaraki 319-1195, Japan
| | - J. Hori
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
- Japan Atomic Energy Research Institute, Ibaraki 319-1195, Japan
| | - T. Nishitani
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
- Japan Atomic Energy Research Institute, Ibaraki 319-1195, Japan
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47
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Cho T, Kohagura J, Numakura T, Hirata M, Hojo H, Ichimura M, Ishii K, Itakura A, Katanuma I, Nakashima Y, Saito T, Tatematsu Y, Yoshikawa M, Minami R, Nagashima S, Yoshida M, Tamano T, Yatsu K, Miyoshi S. Generalized scaling laws of the formation and effects of plasma-confining potentials for tandem-mirror operations in GAMMA 10. Phys Rev Lett 2001; 86:4310-4313. [PMID: 11328162 DOI: 10.1103/physrevlett.86.4310] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2000] [Indexed: 05/23/2023]
Abstract
The main operations from 1979 to 2000 in the GAMMA 10 tandem-mirror, characterized in terms of the high-potential mode having kV-order plasma-confining potentials and the hot-ion mode yielding fusion neutrons with 10-20 keV bulk-ion temperatures, are summarized and generalized as a result of scalings of the formation and the effects of the potentials. The wide validity of potential-formation physics from Cohen's theory and the validity of the generalized Pastukhov's theory for the effects of thermal-barrier potentials on electron confinement are verified and consolidated through electron-energy balance.
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Affiliation(s)
- T Cho
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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48
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Tatematsu Y, Saito T, Kiwamoto Y, Ito K, Abe H, Ishikawa M, Koyama H, Katanuma I, Yatsu K. Cyclotron emission spectra from collisionless electrons resonantly heated by cyclotron waves in a magnetic mirror. Fusion Engineering and Design 2001. [DOI: 10.1016/s0920-3796(00)00489-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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49
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Yoshikawa M, Yamaguchi N, Aota T, Ikeda K, Okamoto Y, Yatsu K, Tamano T. Calibration of space-resolving VUV and soft X-ray spectrographs for plasma diagnostics. J Synchrotron Radiat 1998; 5:762-765. [PMID: 15263645 DOI: 10.1107/s090904959701604x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/1997] [Accepted: 11/10/1997] [Indexed: 05/24/2023]
Abstract
Vacuum ultraviolet (VUV) and soft X-ray measurements are important means of diagnosing impurities in magnetically confined plasmas used in fusion research. Recently, space- and time-resolving flat-field VUV (150-1050 A) and soft X-ray (20-350 A) spectrographs have been constructed by using aberration-corrected concave gratings with varied-spacing grooves which give a wide simultaneous spectral coverage on a microchannel-plate intensified detector. Calibration experiments have been performed at beamlines 11A and 11C at the Photon Factory of the High Energy Accelerator Research Organization. The relative efficiency of the VUV spectrograph has been measured for P-polarization geometry in the spectrograph. In the soft X-ray spectrograph, efficiencies have been obtained for several different points of irradiation on the grating along the groove direction and for two (S and P) polarization geometries.
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Affiliation(s)
- M Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305, Japan
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50
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Kohagura J, Cho T, Hirata M, Okamura T, Tamano T, Yatsu K, Miyoshi S, Hirano K, Maezawa H. New methods for semiconductor charge-diffusion-length measurements using synchrotron radiation. J Synchrotron Radiat 1998; 5:874-876. [PMID: 15263682 DOI: 10.1107/s0909049597017524] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/1997] [Accepted: 11/21/1997] [Indexed: 05/24/2023]
Abstract
The extension of a new theory on the X-ray energy response of semiconductor detectors is carried out to characterize the X-ray response of a multichannel semiconductor detector fabricated on one silicon wafer. Recently, these multichannel detectors have been widely utilized for position-sensitive observations in various research fields, including synchrotron radiation research and fusion-plasma investigations. This article represents the verification of the physics essentials of a proposed theory on the X-ray response of semiconductor detectors. The three-dimensional charge-diffusion effects on the adjoining detector-channel signals are experimentally demonstrated at the Photon Factory for two types of multichannel detectors. These findings are conveniently applicable for measuring diffusion lengths for industrial requirements.
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Affiliation(s)
- J Kohagura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305, Japan
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