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Ishizuka K, Katayama K, Kaji Y, Tawara J, Ohira Y. Paget-Schroetter syndrome. QJM 2022; 115:54-55. [PMID: 34865158 DOI: 10.1093/qjmed/hcab293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- K Ishizuka
- Department of General Medicine, International University of Health and Welfare Narita Hospital, 852, Hatakeda, Narita-city, Chiba Prefecture, Japan
| | - K Katayama
- Department of General Medicine, International University of Health and Welfare Narita Hospital, 852, Hatakeda, Narita-city, Chiba Prefecture, Japan
| | - Y Kaji
- Department of General Medicine, International University of Health and Welfare Narita Hospital, 852, Hatakeda, Narita-city, Chiba Prefecture, Japan
| | - J Tawara
- Department of General Medicine, International University of Health and Welfare Narita Hospital, 852, Hatakeda, Narita-city, Chiba Prefecture, Japan
| | - Y Ohira
- Department of General Medicine, International University of Health and Welfare Narita Hospital, 852, Hatakeda, Narita-city, Chiba Prefecture, Japan
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2
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Affiliation(s)
- K Ishizuka
- Department of General Medicine, International University of Health and Welfare Narita Hospital, 852 Hatakeda, Narita-city, Chiba pref., Japan
| | - K Katayama
- Department of General Medicine, International University of Health and Welfare Narita Hospital, 852 Hatakeda, Narita-city, Chiba pref., Japan
| | - Y Kaji
- Department of General Medicine, International University of Health and Welfare Narita Hospital, 852 Hatakeda, Narita-city, Chiba pref., Japan
| | - J Tawara
- Department of General Medicine, International University of Health and Welfare Narita Hospital, 852 Hatakeda, Narita-city, Chiba pref., Japan
| | - Y Ohira
- Department of General Medicine, International University of Health and Welfare Narita Hospital, 852 Hatakeda, Narita-city, Chiba pref., Japan
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Yoshihara T, Ito K, Zaitsu M, Chung E, Aoyagi I, Kaji Y, Tsuru T, Yonemura T, Yamaguchi K, Nakayama S, Tanaka Y, Yurino N, Koyanagi H, Matsuki S, Urae R, Irie S. SARS-CoV-2 Seroprevalence among Healthcare Workers in General Hospitals and Clinics in Japan. Int J Environ Res Public Health 2021; 18:3786. [PMID: 33916399 PMCID: PMC8038556 DOI: 10.3390/ijerph18073786] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/01/2021] [Accepted: 04/02/2021] [Indexed: 11/16/2022]
Abstract
Coronavirus disease 2019 (COVID-19) has become a serious public health problem worldwide. In general, healthcare workers are considered to be at higher risk of COVID-19 infection. However, the prevalence of COVID-19 among healthcare workers in Japan is not well characterized. In this study, we aimed to examine the seroprevalence of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) antibodies among 2160 healthcare workers in hospitals and clinics that are not designated to treat COVID-19 patients in Japan. The prevalence of SARS-CoV-2 immunoglobulin G was 1.2% in August and October 2020 (during and after the second wave of the pandemic in Japan), which is relatively higher than that in the general population in Japan (0.03-0.91%). Because of the higher risk of COVID-19 infection, healthcare workers should be the top priority for further social support and vaccination against SARS-CoV-2.
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Affiliation(s)
- Tatsuya Yoshihara
- Clinical Research Center, SOUSEIKAI Fukuoka Mirai Hospital, Kashiiteriha 3-5-1, Higashi-ku, Fukuoka 813-0017, Japan;
| | - Kazuya Ito
- SOUSEIKAI Clinical Epidemiological Research Center, Kashiiteriha 3-5-1, Higashi-ku, Fukuoka 813-0017, Japan;
- College of Healthcare Management, Takayanagi 960-4, Setaka-machi, Miyama 835-0018, Japan
| | - Masayoshi Zaitsu
- Department of Public Health, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu-machi, Shimotsuga-gun, Tochigi 321-0293, Japan;
| | - Eunhee Chung
- SOUSEIKAI Global Clinical Research Center, Kashiiteriha 3-5-1, Higashi-ku, Fukuoka 813-0017, Japan;
| | - Izumi Aoyagi
- Department of Internal Medicine, SOUSEIKAI Fukuoka Mirai Hospital, Kashiiteriha 3-5-1, Higashi-ku, Fukuoka 813-0017, Japan;
| | - Yoshikazu Kaji
- SOUSEIKAI Hakata Clinic, 6-18 Tenyamachi, Hakata-ku, Fukuoka 812-0025, Japan;
| | - Tomomi Tsuru
- SOUSEIKAI PS Clinic, 6-18 Tenyamachi, Hakata-ku, Fukuoka 812-0025, Japan;
| | - Takuma Yonemura
- SOUSEIKAI Sumida Hospital, 1-29-1, Honjo, Sumida-ku, Tokyo 130-0004, Japan;
| | - Koji Yamaguchi
- SOUSEIKAI Nishikumamoto Hospital, 1012 Koga, Tomiaimachi, Minami-ku, Kumamoto 861-4157, Japan;
| | - Shinichi Nakayama
- SOUSEIKAI Miyata Hospital, 1636 Honjo, Miyawaka, Fukuoka 823-0003, Japan;
| | - Yosuke Tanaka
- SOUSEIKAI Kanenokuma Hospital, 3-24-16 Kanenokuma, Hakata-ku, Fukuoka 812-0863, Japan;
| | - Nobuo Yurino
- SOUSEIKAI Shinyoshizuka Hospital, 7-6-29, Yoshizuka, Hakata-ku, Fukuoka 812-0041, Japan;
| | - Hideki Koyanagi
- SOUSEIKAI Dodo Clinic, 1-31-13, Nakaikegami, Ota-ku, Tokyo 146-0081, Japan;
| | - Shunji Matsuki
- Clinical Research Center, SOUSEIKAI Fukuoka Mirai Hospital, Kashiiteriha 3-5-1, Higashi-ku, Fukuoka 813-0017, Japan;
| | - Ryuji Urae
- SOUSEIKAI, 3-5-1 Kashiiteriha, Higashi-ku, Fukuoka 813-0017, Japan; (R.U.); (S.I.)
| | - Shin Irie
- SOUSEIKAI, 3-5-1 Kashiiteriha, Higashi-ku, Fukuoka 813-0017, Japan; (R.U.); (S.I.)
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Fujimoto C, Kaji Y, Muneishi M, Kamimura K, Sakaue M. Dietary awareness, eating attitudes, and phosphorus intake in hemodialysis patients with protein-energy wasting (pew). Clin Nutr ESPEN 2020. [DOI: 10.1016/j.clnesp.2020.09.352] [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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5
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Hamatani T, Noda N, Takagaki T, Yodo Y, Kawai H, Kakuyama H, Kaji Y, Fujio Y. Thorough QT/QTc Study Shows That a Novel 5-HT 4 Receptor Partial Agonist Minesapride Has No Effect on QT Prolongation. Clin Pharmacol Drug Dev 2020; 9:938-951. [PMID: 32087003 DOI: 10.1002/cpdd.778] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Accepted: 01/02/2020] [Indexed: 12/17/2022]
Abstract
Minesapride (drug code: DSP-6952) is a potential gastrointestinal prokinetic agent with high selectivity for 5-hydroxytryptamine 4 (5-HT4 ) receptor that acts as a partial agonist. Although 5-HT4 receptor agonists are expected to show efficacy in patients with irritable bowel syndrome with constipation, only tegaserod is available for female patients, with limitations, in the United States. Previously, another 5-HT4 receptor agonist, cisapride, was widely used for the treatment of upper gastrointestinal diseases, but was withdrawn from the market because of arrhythmia with QT prolongation. Chemically, benzamide is one of the most common structures among 5-HT4 receptor agonists. Some benzamide derivatives, such as cisapride, are responsible for QT prolongation, while some, such as mosapride, are not. Thus, we planned a thorough QT/QTc study to investigate the effects of minesapride, a newly designed benzamide derivative, on the QT/QTc. This was a randomized, placebo-controlled, 4-arm, 4-period, crossover study conducted in healthy adults, with administration of single oral doses of minesapride (40 mg and 120 mg), placebo, and moxifloxacin in the fasted state. Minesapride and placebo were administered in a double-blind fashion, while the positive control moxifloxacin was administered in an open-label fashion. Japanese subjects (48 total: 24 males and 24 females) were randomized, and 47 subjects completed all treatment periods. A review of other electrocardiographic data revealed that neither therapeutic (40 mg) nor supratherapeutic (120 mg) doses of minesapride were associated with increased risk of prolonged QT interval.
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Affiliation(s)
- Tatsuto Hamatani
- Clinical Research, Drug Development Division, Sumitomo Dainippon Pharma Co., Ltd., Osaka, Japan
| | - Naoto Noda
- Clinical Research, Drug Development Division, Sumitomo Dainippon Pharma Co., Ltd., Osaka, Japan
| | - Takeshi Takagaki
- Clinical Research, Drug Development Division, Sumitomo Dainippon Pharma Co., Ltd., Osaka, Japan
| | - Yasuhide Yodo
- Data Science, Drug Development Division, Sumitomo Dainippon Pharma Co., Ltd., Osaka, Japan
| | - Hirotaka Kawai
- Clinical Operation, Drug Development Division, Sumitomo Dainippon Pharma Co., Ltd., Osaka, Japan
| | - Hiroyoshi Kakuyama
- Clinical Research, Drug Development Division, Sumitomo Dainippon Pharma Co., Ltd., Osaka, Japan
| | | | - Yasushi Fujio
- Laboratory of Clinical Science and Biomedicine, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, Japan
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6
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Kita T, Kaji Y, Kitamura K. Safety, Tolerability, and Pharmacokinetics of Adrenomedullin in Healthy Males: A Randomized, Double-Blind, Phase 1 Clinical Trial. Drug Des Devel Ther 2020; 14:1-11. [PMID: 32021087 PMCID: PMC6955635 DOI: 10.2147/dddt.s225220] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 12/13/2019] [Indexed: 12/15/2022]
Abstract
Background Adrenomedullin (AM), an endogenous vasodilative peptide, has immunomodulative effects and acts as an accelerator of mucosal regeneration in the digestive tract. AM has shown beneficial effects in rodent models of inflammatory bowel disease and patients with ulcerative colitis. The present study aimed to evaluate the pharmacodynamic properties and safety of AM in healthy male adults in a phase 1 clinical trial. Methods This phase 1, randomized, double-blind, single-center study was conducted on healthy males aged 20–65 years. Subjects received either a placebo, 3 ng/kg/min AM, 9 ng/kg/min AM, or 15 ng/kg/min AM via continuous 12-h intravenous infusion. Other subjects received either placebo or 15 ng/kg/min AM for 8 h per day for 7 days. Adverse events (AEs), vital signs, physical examinations, laboratory tests, electrocardiograms (ECG), and pharmacokinetics were assessed. Findings All 24 subjects in the single-dose test completed the study. Of the 12 subjects in multiple dosing test, one from the AM group withdrew owing to a headache. No serious AEs were reported. Hemodynamic parameters were well maintained in all subjects. Slight ECG abnormalities were observed in the single-dose test. The plasma concentration of AM progressively increased in a dose-dependent manner and reached Cmax at the end of administration. Plasma AM rapidly returned to baseline concentrations after termination, with a T1/2 of under 60 min. Interpretation This is the first phase 1 trial in healthy men evaluating the safety of AM. Our results demonstrate the safety and tolerability of AM for subsequent Phase 2 trials.
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Affiliation(s)
- Toshihiro Kita
- Division of Circulatory and Body Fluid Regulation, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | | | - Kazuo Kitamura
- Division of Circulatory and Body Fluid Regulation, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
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7
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Suzuki K, Okuma Y, Uchiyama T, Miyamoto M, Sakakibara R, Shimo Y, Hattori N, Kuwabara S, Yamamoto T, Kaji Y, Hirano S, Numao A, Matsubara T, Hirata K. Restless legs syndrome and leg motor restlessness in patients with Parkinson's disease: a multicenter case-controlled study. Sleep Med 2017. [DOI: 10.1016/j.sleep.2017.11.940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Shinozawa T, Nakamura K, Shoji M, Morita M, Kimura M, Furukawa H, Ueda H, Shiramoto M, Matsuguma K, Kaji Y, Ikushima I, Yono M, Liou SY, Nagai H, Nakanishi A, Yamamoto K, Izumo S. Recapitulation of Clinical Individual Susceptibility to Drug-Induced QT Prolongation in Healthy Subjects Using iPSC-Derived Cardiomyocytes. Stem Cell Reports 2017; 8:226-234. [PMID: 28111276 PMCID: PMC5312248 DOI: 10.1016/j.stemcr.2016.12.014] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [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: 05/14/2016] [Revised: 12/14/2016] [Accepted: 12/15/2016] [Indexed: 01/09/2023] Open
Abstract
To predict drug-induced serious adverse events (SAE) in clinical trials, a model using a panel of cells derived from human induced pluripotent stem cells (hiPSCs) of individuals with different susceptibilities could facilitate major advancements in translational research in terms of safety and pharmaco-economics. However, it is unclear whether hiPSC-derived cells can recapitulate interindividual differences in drug-induced SAE susceptibility in populations not having genetic disorders such as healthy subjects. Here, we evaluated individual differences in SAE susceptibility based on an in vitro model using hiPSC-derived cardiomyocytes (hiPSC-CMs) as a pilot study. hiPSCs were generated from blood samples of ten healthy volunteers with different susceptibilities to moxifloxacin (Mox)-induced QT prolongation. Different Mox-induced field potential duration (FPD) prolongation values were observed in the hiPSC-CMs from each individual. Interestingly, the QT interval was significantly positively correlated with FPD at clinically relevant concentrations (r > 0.66) in multiple analyses including concentration-QT analysis. Genomic analysis showed no interindividual significant differences in known target-binding sites for Mox and other drugs such as the hERG channel subunit, and baseline QT ranges were normal. The results suggest that hiPSC-CMs from healthy subjects recapitulate susceptibility to Mox-induced QT prolongation and provide proof of concept for in vitro preclinical trials. We prepared iPSCs from healthy volunteers with different susceptibilities to drug Mox-induced FPD prolongation in hiPSC-CMs differed between individuals QT interval correlated with FPD value around clinically relevant concentrations We found no significant genetic differences in the TdP-susceptibility SNP analysis
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Affiliation(s)
- Tadahiro Shinozawa
- Drug Safety Research Laboratories, Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26-1 Muraoka-Higashi 2-chome, Fujisawa, Kanagawa 251-8555, Japan.
| | - Koki Nakamura
- Global Medical Affairs-Japan, Takeda Pharmaceutical Company Limited, 12-10 Nihonbashi 2-chome, Chuo-ku, Tokyo 103-8668, Japan
| | - Masanobu Shoji
- Integrated Technology Research Laboratories, Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26-1 Muraoka-Higashi 2-chome, Fujisawa, Kanagawa 251-8555, Japan
| | - Maya Morita
- Drug Safety Research Laboratories, Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26-1 Muraoka-Higashi 2-chome, Fujisawa, Kanagawa 251-8555, Japan
| | - Maya Kimura
- Drug Safety Research Laboratories, Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26-1 Muraoka-Higashi 2-chome, Fujisawa, Kanagawa 251-8555, Japan
| | - Hatsue Furukawa
- Drug Safety Research Laboratories, Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26-1 Muraoka-Higashi 2-chome, Fujisawa, Kanagawa 251-8555, Japan
| | - Hiroki Ueda
- Development Operations Department, Takeda Development Center Japan, Pharmaceutical Development Division, Takeda Pharmaceutical Company Limited, 12-10 Nihonbashi 2-chome, Chuo-ku, Tokyo 103-8668, Japan
| | - Masanari Shiramoto
- Hakata Clinic, Souseikai, 6-18 Tenya-machi, Hakata-ku, Fukuoka 812-0025, Japan
| | - Kyoko Matsuguma
- Sugioka Memorial Hospital (current Fukuoka Mirai Hospital), Souseikai, 5-1 Kashii-Teriha 3-chome, Higashi-ku, Fukuoka 813-0017, Japan
| | - Yoshikazu Kaji
- Sumida Hospital, Souseikai, 1-29-1 Honjo, Sumida-ku, Tokyo 130-0004, Japan
| | - Ippei Ikushima
- Sumida Hospital, Souseikai, 1-29-1 Honjo, Sumida-ku, Tokyo 130-0004, Japan
| | - Makoto Yono
- Nishi-Kumamoto Hospital, Souseikai, 1012 Koga, Tomiai-machi, Minami-ku, Kumamoto 861-4157, Japan
| | - Shyh-Yuh Liou
- Development Operations Department, Takeda Development Center Japan, Pharmaceutical Development Division, Takeda Pharmaceutical Company Limited, 12-10 Nihonbashi 2-chome, Chuo-ku, Tokyo 103-8668, Japan
| | - Hirofumi Nagai
- Drug Safety Research Laboratories, Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26-1 Muraoka-Higashi 2-chome, Fujisawa, Kanagawa 251-8555, Japan
| | - Atsushi Nakanishi
- Integrated Technology Research Laboratories, Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26-1 Muraoka-Higashi 2-chome, Fujisawa, Kanagawa 251-8555, Japan
| | - Keiji Yamamoto
- Integrated Technology Research Laboratories, Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26-1 Muraoka-Higashi 2-chome, Fujisawa, Kanagawa 251-8555, Japan
| | - Seigo Izumo
- Regenerative Medicine Unit, Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26-1 Muraoka-Higashi 2-chome, Fujisawa, Kanagawa 251-8555, Japan
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Imataka G, Tsuboi Y, Kano Y, Ogino K, Tsuchioka T, Ohnishi T, Kaji Y, Wake K, Ichikawa G, Suzumura H, Arisaka O. Treatment with mild brain hypothermia for cardiopulmonary resuscitation after myoclonic seizures in infant with robertsonian type of trisomy 13. Eur Rev Med Pharmacol Sci 2015; 19:2852-2855. [PMID: 26241539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Congenital chromosomal abnormality with trisomy 13 is known to be associated with poor life prognosis and lethal. Therefore, physician advice the patients be kept in intensive treatment with resuscitation and state of the art intensive care when sudden change in the general condition with this trisomy is observed. We report herein, the treatment with mild brain hypothermia therapy for cardiopulmonary resuscitation after myoclonic seizures in infant with Robertsonian type of trisomy 13 in intensive care unit. Our study indicated that brain hypothermia therapy and steroid pulse therapy on an infant who was believed to have post-resuscitation hypoxic encephalopathy was highly effective as the patient's general condition recovered to the original state after four months.
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Affiliation(s)
- G Imataka
- Department of Pediatrics, Dokkyo Medical University School of Medicine, Tochigi, Japan.
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10
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Yono M, Matsuki S, Chung E, Mugitani A, Tanaka T, Kan S, Chiyoda T, Kaji Y. Urinary Occult Blood Tests In Healthy Male and Female Volunteers From Three Different Age Groups. Clin Ther 2015. [DOI: 10.1016/j.clinthera.2015.05.091] [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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Shiramoto M, Uchimaru H, Kaji Y, Matsuguma K, Matsuki S, Ikushima I, Yonou M, Irie S. Evaluation of Assay Sensitivity and the Concentration-Effect Relationship of Moxifloxacin in a QT/QTc Study in Japan. Ther Innov Regul Sci 2014; 48:181-189. [PMID: 30227503 DOI: 10.1177/2168479013502180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
To investigate the potential for a QT/QTc study in Japan, a randomized, single-blind, crossover study was conducted using moxifloxacin in 64 healthy Japanese male volunteers. A 12-lead Holter electrocardiogram was used to test a relatively small population at each of 4 incorporated clinical research units to confirm the assay sensitivity and efficiency. Moxifloxacin (400 mg) significantly prolonged QT intervals, as previously reported, with small variations in this study. In addition, the placebo-adjusted mean QTcF changes from predose baseline showed that the lower bounds of the 1-sided 95% confidence interval exceeded 5 milliseconds at all of the clinical research units. The data also indicated statistically significant concentration-QT relationships in 3 of the 4 research units by separate analysis. These findings and the small amount of variability in this study suggest the feasibility of conducting a high-quality QT/QTc study in Japan.
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Affiliation(s)
| | | | | | - Kyoko Matsuguma
- 3 Kyushu Clinical Pharmacology Research Clinic, LTA Medical Corp, Fukuoka, Japan
| | - Shunji Matsuki
- 3 Kyushu Clinical Pharmacology Research Clinic, LTA Medical Corp, Fukuoka, Japan
| | | | - Makoto Yonou
- 4 Nishi Kumamoto Hospital, LTA Medical Corp, Kumamoto, Japan
| | - Shin Irie
- 3 Kyushu Clinical Pharmacology Research Clinic, LTA Medical Corp, Fukuoka, Japan
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12
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Jagtap S, Kaji Y, Fukuoka A, Hara K. High density monolayer of diisocyanide on gold surface as a platform of supported Rh-catalyst for selective 1,4-hydrogenation of α,β-unsaturated carbonyl compounds. Chem Commun (Camb) 2014; 50:5046-8. [DOI: 10.1039/c3cc48181f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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13
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Tsuru T, Udagawa Y, Yamaguchi M, Itakura M, Kaburaki H, Kaji Y. Solution softening in magnesium alloys: the effect of solid solutions on the dislocation core structure and nonbasal slip. J Phys Condens Matter 2013; 25:022202. [PMID: 23220883 DOI: 10.1088/0953-8984/25/2/022202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
There is a pressing need to improve the ductility of magnesium alloys so that they can be applied as lightweight structural materials. In this study, a mechanism for enhancing the ductility of magnesium alloys has been pursued using the atomistic method. The generalized stacking fault (GSF) energies for basal and prismatic planes in magnesium were calculated by using density functional theory, and the effect of the GSF energy on the dislocation core structures was examined using a semidiscrete variational Peierls-Nabarro model. Yttrium was found to have an anomalous influence on the solution softening owing to a reduction in the GSF energy gradient.
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Affiliation(s)
- T Tsuru
- Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency, Tokai-mura, Ibaraki, Japan.
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14
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Inoue H, Murakami H, Matsumoto M, Kaji Y. Oxidative and Anti-oxidative Status in Blood of Streptozotocin-induced Diabetic Piglets. Asian Australas J Anim Sci 2011. [DOI: 10.5713/ajas.2011.90527] [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: 11/27/2022]
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15
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Kitajima K, Murakami K, Kaji Y, Sakamoto S, Sugimura K. Established, emerging and future applications of FDG-PET/CT in the uterine cancer. Clin Radiol 2011; 66:297-307. [PMID: 21356392 DOI: 10.1016/j.crad.2010.07.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Revised: 07/12/2010] [Accepted: 07/18/2010] [Indexed: 10/18/2022]
Abstract
Integrated positron emission tomography/computed tomography (PET/CT) with 2-[¹⁸F]fluoro-2-deoxy-D-glucose (FDG) is a useful technique to acquire both glucose metabolic and anatomic imaging data using a single device in a single diagnostic session and has opened a new field in clinical oncologic imaging. FDG-PET/CT has been used successfully for the staging, optimization of treatment, re-staging, therapy monitoring, and prognostic prediction of uterine cervical cancer and endometrial cancer as well as various malignant tumours. The present review discusses the current role of FDG-PET/CT in the management of uterine cancer, discussing its usefulness and limitations in the imaging of these patients.
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Affiliation(s)
- K Kitajima
- PET Diagnosis, Institute of Biomedical Research and Innovation, Kobe, Japan.
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16
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Fu K, Ishikawa T, Yamamoto T, Kaji Y. Paracentesis for successful treatment of tension pneumoperitoneum related to endoscopic submucosal dissection. Endoscopy 2009; 41 Suppl 2:E245. [PMID: 19787572 DOI: 10.1055/s-2007-966489] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [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: 12/10/2022]
Affiliation(s)
- K Fu
- Department of Radiology, Dokkyo Medical University, Shimotuga, Tochigi, Japan.
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17
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Ito K, Takemoto M, Mukai Y, Inoue S, Kaji Y, Chishaki A, Sunagawa K. Radio-frequency catheter ablation of atypical atrioventricular nodal reentrant tachycardia from a trans-aortic approach. Fukuoka Igaku Zasshi 2009; 100:360-365. [PMID: 20384206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Radio-frequency catheter ablation (RFCA) was introduced for the treatment of reentrant tachyarrhythmias and has proven its usefulness, efficacy, and safety. It has gained the position of an early stage treatment option rather than being a 'last resort' option for certain groups of patients with supraventricular tachycardias including atrioventricular nodal reentrant tachycardia (AVNRT). The RFCA technique for AVNRT seems to have become established throughout these years and the right-side approach is considered to be the conventional method. However, in one percent of the patients with AVNRT it has been reported that they cannot be cured by the conventional method and a left-sided approach has been recommended. We experienced a case which presented with a fast/slow atypical AVNRT. We ultimately successfully treated the case with a left-sided (trans-aortic) RFCA approach. We believe the trans-aortic RFCA approach is a necessary alternative in the case of an unsuccessful RFCA via the right-sided approach even though the frequency of its need is very low.
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Affiliation(s)
- Koji Ito
- Department of Cardiovascular Medicine, Kyushu University Hospital, Fukuoka, Japan
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Kaji Y, Oshika T, Takazawa Y, Fukayama M, Fujii N. Immunohistochemical localisation of d- -aspartic acid-containing proteins in climatic droplet keratopathy. Br J Ophthalmol 2009; 93:977-9. [DOI: 10.1136/bjo.2008.144212] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Wakahama H, Mitoa S, Ohsumi T, Ueda A, Yajima T, Satoh H, Sugiyama K, Ozawa A, Ajima S, Todaka N, Sato T, Kato M, Kaji Y, Tokumarui T, Kaieda H, Kubota K. A concept of CO2 Georeactor sequestration at the Ogachi HDR site, NE Japan. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.egypro.2009.02.166] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Fu KI, Fukui H, Tominaga K, Kaji Y, Hiraishi H, Fujimori T. Gastric ulcer penetrating into the heart. Endoscopy 2008; 38 Suppl 2:E14. [PMID: 17123210 DOI: 10.1055/s-2006-944631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- Kuang-I Fu
- Department of Surgical and Molecular Pathology, Dokkyo University School of Medicine, Tochigi, Japan
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Affiliation(s)
- F Kuang-I
- Department of Radiology, Dokkyo University School of Medicine, Mibu, Shimotuga, Tochigi, Japan
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23
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Nakamura H, Ito H, Egami Y, Kaji Y, Maruyama T, Koike G, Jingu S, Harada M. Waist circumference is the main determinant of elevated C-reactive protein in metabolic syndrome. Diabetes Res Clin Pract 2008; 79:330-6. [PMID: 17964679 DOI: 10.1016/j.diabres.2007.09.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2007] [Accepted: 09/06/2007] [Indexed: 01/04/2023]
Abstract
BACKGROUND Metabolic syndrome (MetS) is known to increase the risk of cardiovascular disease. C-reactive protein (CRP) has been reported to be elevated in subjects with MetS. However, which component of MetS contributes mostly to the elevation has not been studied in detail. METHODS We studied 628 apparently healthy Japanese subjects (men 262, women 366, age 19-85 years). Body mass index, waist circumference (WC), blood pressure, lipids, glucose, insulin and CRP were measured. MetS was defined according to the National Cholesterol Education Program's Adult Treatment Panel III report. RESULTS In partial correlation analysis, WC showed the strongest correlation with CRP among the variables related to MetS. CRP increased as the number of MetS components increased. The mean CRP value adjusted for demographic variables was higher in subjects with MetS than those without MetS, and further adjustments with variables related to MetS revealed that the significant difference between the two groups disappeared only when further adjustment was made for WC. In multiple linear regression analysis, the independent variable that most strongly explained the CRP level was WC, which was followed by HDL-cholesterol. Finally, comparison of the CRP levels in groups stratified by abdominal obesity and the number of MetS components revealed that those with abdominal obesity tended to show higher CRP levels compared with those without abdominal obesity regardless of the number of MetS components other than WC. CONCLUSIONS Subjects with MetS showed higher levels of CRP and the main determinant of the CRP elevation was WC.
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Affiliation(s)
- Hirofumi Nakamura
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Maidashi 3-1-1, Fakuoka 812-8582, Japan.
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Takemoto M, Nishizaka M, Matsukawa R, Kaji Y, Chishaki A, Sunagawa K. CARTO images after heart transplantation. Intern Med 2008; 47:813-4. [PMID: 18421208 DOI: 10.2169/internalmedicine.47.0880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Masao Takemoto
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences Kyushu University, Fukuoka.
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25
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Yasuda S, Nakamura H, Karashima E, Ueda J, Nakaji G, Shimazu H, Hiramatsu SI, Odashiro K, Maruyama T, Kaji Y. Noncontact Mapping-Guided Catheter Ablation of Posterosuperior Right Atrial Tachycardia Associated with Sick Sinus Syndrome. J Arrhythm 2008. [DOI: 10.1016/s1880-4276(08)80005-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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26
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Okamoto F, Okamoto C, Sakata N, Hiratsuka K, Yamane N, Hiraoka T, Kaji Y, Oshika T. Changes in Corneal Topography after 25-Gauge Transconjunctival Sutureless Vitrectomy versus after 20-Gauge Standard Vitrectomy. Ophthalmology 2007; 114:2138-41. [PMID: 18054632 DOI: 10.1016/j.ophtha.2007.01.034] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2006] [Revised: 01/12/2007] [Accepted: 01/20/2007] [Indexed: 10/22/2022] Open
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Fu K, Nakamura T, Masuyama H, Yamagishi H, Kaji Y, Fujimori T, Terano A. Education and imaging. Gastrointestinal: natural history of squamous cell carcinoma of the esophagus. J Gastroenterol Hepatol 2007; 22:1551. [PMID: 17716358 DOI: 10.1111/j.1440-1746.2007.05132.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- K Fu
- Department of Radiology, Dokkyo Medical University, Mibu, Shimotuga, Tochigi, Japan
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28
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Kunisaki Y, Takase K, Miyamoto T, Fukata M, Nonami A, Kamezaki K, Kaji Y, Gondo H, Harada M, Nagafuji K. Marked improvement of cardiac function early after non-myeloablative BMT in a heavily transfused patient with severe aplastic anemia and heart failure. Bone Marrow Transplant 2007; 40:593-5. [PMID: 17618320 DOI: 10.1038/sj.bmt.1705764] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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29
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Maruyama T, Kishikawa T, Ito H, Kaji Y, Sasaki Y, Ishihara Y. Augmentation of Pulmonary Vein Backflow Velocity during Left Atrial Contraction: A Novel Phenomenon Responsible for Progression of Atrial Fibrillation in Hypertensive Patients. Cardiology 2007; 109:33-40. [PMID: 17627107 DOI: 10.1159/000105324] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2006] [Accepted: 10/26/2006] [Indexed: 11/19/2022]
Abstract
BACKGROUND Atrial fibrillation (AF) is a common arrhythmia showing disease progression. However, echocardiographic prediction of such progression remains incomplete. This study aimed to identify echocardiographic predictors of AF progression in hypertensive patients. METHODS Hypertensive patients with paroxysmal AF were divided into two groups: patients with AF which became permanent (group A; n = 13) and those with AF which remained paroxysmal (group B; n = 46) during the same follow-up period (8.0 +/- 2.4 years). Clinical baselines showed no significant differences except for age. Transthoracic echocardiography was recorded 1-2 weeks after termination of the first-detected paroxysms of AF. RESULTS Echocardiography showed greater left atrial (LA) dimension (p = 0.023) and late diastolic pulmonary vein (PV) backflow velocity (p < 0.001), and a lower LA fractional shortening (p = 0.008) in group A than in group B. Multilogistic regression analysis demonstrated that augmented PV backflow (p = 0.007) and reduced LA fractional shortening (p = 0.032) were independent predictors of the progression of AF. The receiver-operating characteristic curve demonstrated that PV backflow augmentation is the best predictor of future AF perpetuation. CONCLUSION PV backflow leading to cyclic stretching of PV musculature contributes to AF progression.
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Affiliation(s)
- Toru Maruyama
- Department of Medicine, Kyushu University, Fukuoka, Japan.
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Fu K, Ishikawa T, Ooyanagi H, Kaji Y, Shimizu H. Multimodality treatments for nodal relapse after endoscopic mucosal resection of a superficial esophageal squamous cell carcinoma. Endoscopy 2007; 39:669-71. [PMID: 17611925 DOI: 10.1055/s-2007-966588] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Patients with esophageal intraepithelial carcinoma (m1) and carcinoma invading the lamina propria (m2) are generally considered good candidates for endoscopic mucosal resection (EMR) in Japan, as hardly any of them show lymph node metastasis. Although a few cases of esophageal carcinoma invading the lamina propria have been reported to show nodal involvement, lymph node metastasis and subsequent death due to carcinoma after EMR of m1 or m2 esophageal carcinoma has never been reported in the English literature. Here we describe a patient who suffered relapse of lymph node metastasis after EMR of an esophageal carcinoma invading the lamina propria without any of the reported risk factors associated with lymph node metastasis, including vascular invasion. Unfortunately, the patient died due to disease recurrence, despite receiving multimodality treatments including chemoradiotherapy and salvage surgery.
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MESH Headings
- Aged
- Antineoplastic Agents/therapeutic use
- Biopsy
- Carcinoma, Squamous Cell/pathology
- Carcinoma, Squamous Cell/surgery
- Drug Therapy, Combination
- Endoscopy, Gastrointestinal/methods
- Esophageal Neoplasms/pathology
- Esophageal Neoplasms/surgery
- Fatal Outcome
- Follow-Up Studies
- Humans
- Intestinal Mucosa/pathology
- Intestinal Mucosa/surgery
- Male
- Neoplasm Recurrence, Local/diagnosis
- Neoplasm Recurrence, Local/drug therapy
- Neoplasm Recurrence, Local/radiotherapy
- Neoplasm Recurrence, Local/therapy
- Radiotherapy, Adjuvant
- Tomography, X-Ray Computed
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Affiliation(s)
- K Fu
- Department of Radiology, Dokkyo Medical University, Mibu, Shimotuga, Tochigi, Japan.
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Katsumata M, Kaji Y, Takada R, Dauncey MJ. Nutritional Regulation of GLUT Expression, Glucose Metabolism, and Intramuscular Fat Content in Porcine Muscle. Asian Australas J Anim Sci 2007. [DOI: 10.5713/ajas.2007.1297] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Nakamura H, Nakaji G, Shimazu H, Yasuda S, Odashiro K, Maruyama T, Kaji Y, Chishaki A. Case of paroxysmal atrial fibrillation improved after the administration of proton pump inhibitor for associated reflux esophagitis. Fukuoka Igaku Zasshi 2007; 98:270-6. [PMID: 17665548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A 64-year-old man had demonstrated palpitations caused by paroxysmal atrial fibrillation (AF) documented by ambulatory electrocardiographic monitoring. Effectiveness of antiarrhythmic agent (disopyramide: 300 mg/day) was limited. Based on the gastrointestinal endoscopic findings, proton pump inhibitor (PPI: rabeprazole, 10 mg/day) was administered to eliminate heart burn due to reflux esophagitis. Symptoms of paroxysmal AF and reflux esophagitis were confusing due to the anatomical proximity of the diseased organs and concomitant occurrence in the evening and when in a supine position. After the additional PPI therapy, not only was reflux esophagitis improved subjectively and endoscopically but also paroxysms of AF markedly reduced. Because esophagus is attached to left atrial posterior wall and the role of inflammatory process on the development of AF is highlighted, amelioration of reflux esophagitis by PPI may have been followed by the remarkable reduction of paroxysms of AF.
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Affiliation(s)
- Hirofumi Nakamura
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, 812-8582, Japan
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Fukunishi H, Funaki K, Ikuma K, Kaji Y, Sugimura K, Kitazawa R, Kitazawa S. Unsuspected uterine leiomyosarcoma: magnetic resonance imaging findings before and after focused ultrasound surgery. Int J Gynecol Cancer 2007; 17:724-8. [PMID: 17300682 DOI: 10.1111/j.1525-1438.2007.00818.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Uterine leiomyosarcoma, initially diagnosed as leiomyoma on magnetic resonance (MR) images, was disclosed after focused ultrasound surgery (FUS). The tumor did not display high signal intensity on either T1- or T2-weighted images on the patient's first visit. Four months thereafter, T2-weighted images revealed a high signal intensity area within the tumor, while T1-weighted images showed low signal intensity. Six months after FUS, the nonperfused volume calculated on meglumine gadoterate-enhanced T1-weighted images decreased markedly and an intermediate signal intensity in a circular area on T2-weighted images appeared to be atypically increasing in volume. After laparoscopic myomectomy, this tumor was diagnosed as uterine leiomyosarcoma coexistent with leiomyoma. The early stages of uterine leiomyosarcoma are clinically difficult to diagnose; therefore, both careful monitoring during FUS and close follow-up after the procedure are vital.
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Affiliation(s)
- H Fukunishi
- Department of Gynecology, Shinsuma Hospital, Kobe, Hyogo, Japan.
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Nakamura H, Fu KI, Matsumoto J, Kaji Y, Fujimori T. Polypectomy as a diagnostic tool for ileocecal lymphoma. Endoscopy 2007; 39 Suppl 1:E43. [PMID: 17285497 DOI: 10.1055/s-2006-945067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- H Nakamura
- Department of Gastroenterology , Chofu Surgical Clinic, Tokyo, Japan
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Fu K, Ishikawa T, Igarashi S, Tsuura Y, Hirabayashi K, Kaji Y. Mucin-secreting neoplastic polyp: a unique endoscopic presentation of early colon cancer. Endoscopy 2007; 39 Suppl 1:E201. [PMID: 17614077 DOI: 10.1055/s-2007-966107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- K Fu
- Department of Radiology, Dokkyo University School of Medicine, Tochigi, Japan.
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Fu KI, Ishikawa T, Fujii H, Hirabayashi K, Igarashi S, Kaji Y. An ileal metastasis from a parotid gland cancer that mimicked a flat adenoma. Endoscopy 2007; 39 Suppl 1:E28. [PMID: 17285507 DOI: 10.1055/s-2006-944988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- K I Fu
- Department of Radiology, Dokkyo University School of Medicine, Mibu, Shimotuga, Tochigi, Japan.
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Nakamura H, Fu K, Parra-Blanco A, Yamamura A, Oono Y, Iriguchi Y, Matumoto J, Kaji Y, Ishikawa T. A sessile colonic polyp showing striking morphological changes within a 2-month period. Endoscopy 2007; 39 Suppl 1:E279-80. [PMID: 17957624 DOI: 10.1055/s-2007-966665] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 12/10/2022]
Affiliation(s)
- H Nakamura
- Department of Gastroenterology, Chofu Surgical Clinic, Tokyo, Japan
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Affiliation(s)
- K Fu
- Dept. of Radiology, Dokkyo University School of Medicine, Tochigi, Japan.
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Affiliation(s)
- K Fu
- Division of Gastrointestinal Oncology and Digestive Endoscopy, National Cancer Center Hospital East, Kashiwa, Chiba, Japan.
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Abstract
BACKGROUND Although ultrasound (US) is widely used in cardiology, little is known about the effects of US energy on cardiac performance. This study aimed to investigate the mechanical effects of high-intensity continuous US energy (1.0 MHz with 3 different intensities) on cardiac performance. METHODS AND RESULTS Either left ventricular (LV) pressure or aortic blood flow (ABF) was evaluated in open-chest guinea pigs (n=30) under surface ECG monitoring. LV systolic pressure and ABF increased significantly (ie, maximum percent increases in these parameters were 2.5%, 3.1% and 7.1% for LV systolic pressure and 9.4%, 4.9% and 8.8% for mean ABF at intensities of 0.06, 0.67 and 2.90 W/cm2, respectively). LV end-diastolic pressure was reduced significantly by US (5.3+/-0.9 to 4.8+/-0.8, 5.5 +/-1.3 to 4.8+/-1.0 and 5.8+/-2.0 to 5.0+/-1.2 mmHg, respectively), indicating positive inotropic and lusitropic effects and resultant ABF augmentation. Local temperature was not significantly changed. ECG showed neither chronotropic action nor arrhythmogenesis. CONCLUSIONS Although the basic mechanisms of these phenomena remain unclear, this pilot study of the short-term effects of US energy on cardiac performance suggests the possibility of physical therapy for heart failure.
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Affiliation(s)
- Fumiaki Kuma
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
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Abstract
BACKGROUND Climatic droplet keratopathy (CDK), known as spheroid degeneration of the cornea, is one of the most frequent degenerative corneal disorders affecting visual function. However, the histochemical nature of the deposits seen in CDK is still unclear. AIM To investigate the pathogenesis of CDK, we investigated the immunohistochemical localisation of advanced glycation end products (AGEs) in surgical specimens of CDK. METHODS Immunohistochemical localisation of N(epsilon)-(carboxymethyl)-l-lysine (CML), N(epsilon)-(carboxyethyl)-l-lysine (CEL), pyrraline, pentosidine and imidazolone was examined in three corneas with CDK, six corneas with bullous keratopathy and three corneas without any corneal diseases. RESULTS In all the specimens with CDK, immunoreactivity was strong in CML, moderate in pyrraline and pentosidine, and weak in imidazolone. Immunoreactivity was absent in CEL. In contrast, no immunoreactivity to CML, pyrraline, pentosidine, imidazolone or CEL was detected in corneas with bullous keratopathy, or in corneas without any corneal diseases. CONCLUSIONS CDK is caused by an aggregation of AGE-modified proteins. The result is consistent with etiological findings that ultraviolet irradiation and ageing, both of which are accelerators of AGE formation, are closely related to the development of CDK.
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Affiliation(s)
- Y Kaji
- Department of Ophthalmology, Tsukuba University Institute of Clinical Medicine, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8575, Japan.
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Oshika T, Okamoto F, Kaji Y, Hiraoka T, Kiuchi T, Sato M, Kawana K. Retention and removal of a new viscous dispersive ophthalmic viscosurgical device during cataract surgery in animal eyes. Br J Ophthalmol 2006; 90:485-7. [PMID: 16547332 PMCID: PMC1856992 DOI: 10.1136/bjo.2005.085969] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
AIMS To assess the retention and removal properties of a new viscous dispersive ophthalmic viscosurgical device (OVD), DisCoVisc, in comparison with those of cohesive (Provisc), dispersive (Viscoat), and viscoadaptive (Healon5) OVDs. METHODS In 20 porcine eyes, cataract surgery was simulated using one of the four OVDs which were stained with fluorescein for better visualisation. Three parameters were measured. Firstly, the presence/absence of OVDs in the chamber at the completion of phacoemulsification was recorded. Secondly, the time until the OVDs were completely removed from the anterior chamber using the phaco needle was measured. Thirdly, after intraocular lens (IOL) implantation, the time needed to completely remove the OVDs from the chamber with irrigation/aspiration tip was recorded. RESULTS At the completion of phacoemulsification, the OVDs retained in 0% (0/5) for Provisc, 80% (4/5) for Healon5, 100% (5/5) for DisCoVisc, and 100% (5/5) for Viscoat. The retention of OVDs during phacoemulsification was greatest with Viscoat followed by, in descending order, DisCoVisc, Healon5, and Provisc. The removal of OVDs after IOL implantation took longest with Viscoat followed by Healon5, DisCoVisc, and Provisc. CONCLUSION The viscous dispersive DisCoVisc showed excellent retention during phacoemulsification, while its removal after IOL implantation was very easy. When compared with the viscoadaptive Healon5, DisCoVisc was retained better in the chamber and was easier to remove. These features of DisCoVisc should be highly advantageous when considering covering the entire cataract surgery procedure with a single OVD.
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Affiliation(s)
- T Oshika
- Department of Ophthalmology, Institute of Clinical Medicine, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki, 305-8575 Japan.
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Ishikawa F, Shimazu H, Shultz LD, Fukata M, Nakamura R, Lyons B, Shimoda K, Shimoda S, Kanemaru T, Nakamura KI, Ito H, Kaji Y, Perry ACF, Harada M. Purified human hematopoietic stem cells contribute to the generation of cardiomyocytes through cell fusion. FASEB J 2006; 20:950-2. [PMID: 16585061 DOI: 10.1096/fj.05-4863fje] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
To obtain insights into the cardiomyogenic potential of hematopoietic tissue, we intravenously (i.v.) injected purified hematopoietic stem/progenitor cells into newborn recipients that may fully potentiate the developmental plasticity of stem cells. Transplantation of mouse bone marrow (BM) lineage antigen-negative (Lin-) cells resulted in the generation of the cells that displayed cardiomyocyte-specific antigenic profiles and contractile function when transplanted into syngeneic newborn recipients. To clarify the mechanism underlying the cardiomyogenic potential, green fluorescent protein (GFP)-labeled BM Lin-ScaI+ hematopoietic progenitors were transplanted into neonatal mice constitutively expressing cyan fluorescence protein (CFP). Lambda image acquisition and linear unmixing analysis using confocal microscopy successfully separated GFP and CFP, and revealed that donor GFP+ cardiomyocytes coexpressed host-derived CFP. We further reconstituted human hemopoietic- and immune systems in mice by injecting human cord blood (CB)-derived Lin-CD34+CD38- hematopoietic stem cells (HSCs) into neonatal T cell(-)B cell(-)NK cell- immune-deficient NOD/SCID/IL2rgamma(null) mice. Fluoroescence in situ hybridization analysis of recipient cardiac tissues demonstrated that human and murine chromosomes were colocalized in the same cardiomyocytes, indicating that cell fusion occurred between human hematopoietic progeny and mouse cardiomyocytes. These syngeneic- and xenogeneic neonatal transplantations provide compelling evidence that hematopoietic stem/progenitor cells contribute to the postnatal generation of cardiomyocytes through cell fusion, not through transdifferentiation.
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Affiliation(s)
- Fumihiko Ishikawa
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
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Kurome M, Tomii R, Ueno S, Hiruma K, Saito H, Nakamura K, Okumura K, Matsumoto S, Matsumoto M, Kaji Y, Endo F, Nagashima H. 50 PRODUCTION OF THIRD-GENERATION CLONES OF A PIG BY SOMATIC CELL NUCLEAR TRANSFER. Reprod Fertil Dev 2006. [DOI: 10.1071/rdv18n2ab50] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
There has been a dominant view that serial cloning, i.e., cloning of a cloned animal, is only possible for a few generations. In this study, we examined the reproduction efficiency and normality of porcine offspring generated by serial somatic cell cloning. Salivary gland progenitor (SGP) cells were collected from a 4-month-old female cloned Landrace large white Duroc (LWD) pig (first generation, G1), which had been cloned from a fibroblast, and used as nuclear donors for second-generation clones (G2). The third generation of clones (G3) was produced by nuclear transfer using SGP cells from the G2 clones. Nuclear transfer was carried out by electric cell fusion using in vitro matured oocytes as recipients. Reconstructed embryos were electroactivated 1 to 1.5 hr after nuclear transfer, cultured for 1 to 2 days, and transplanted to the oviducts of estrus-synchronized surrogate gilts. A total of 391 embryos cloned from G1 animals were transplanted to three surrogates. All of the surrogates became pregnant and gave birth to a total of 13 (3.3%) of G2 clones (including two stillbirths). The average birth weight and size of eleven live piglets were 1203.6 � 113.5 g and 27.1 � 1.2 cm, both within the standard ranges of the original donor strain (LWD). Their growths until 8 months old were comparable to those of normal piglets of the same strain. For the generation of G3 clones, transplantation of 242 G2-derived embryos to two surrogate gilts resulted in one pregnant surrogate and three G3 clones (1.2%; average weight 1196.7 � 267.1 g and average size 35.7 � 2.3 cm), including a stillbirth. These results indicate that porcine serial cloning can efficiently generate up to three generations of apparently healthy clones, when SGP cells are used as nuclear donors.
This study was supported by PROBRAIN.
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Koga JI, Ohno M, Okamoto K, Nakasuga K, Ito H, Nagafuji K, Shimono N, Koga H, Hayashida A, Arita T, Maruyama T, Kaji Y, Harada M. Cholesterol embolization treated with corticosteroids--two case reports. Angiology 2005; 56:497-501. [PMID: 16079936 DOI: 10.1177/000331970505600420] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Cholesterol embolization (CE) is a potentially serious complication associated with invasive arterial maneuvers, in which standard therapy has not been established. We experienced two cases of CE in patients with severe atherosclerosis whose renal function deteriorated within a few months after invasive arterial maneuvers. CE was confirmed either by renal biopsy (case 1) or skin biopsy (case 2). Oral administration of prednisolone at a daily dose of 30 mg (0.4 mg/kg) was effective to improve their renal function. Our observation suggests that corticosteroid therapy may be beneficial in some patients with CE.
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Affiliation(s)
- Jun-ichiro Koga
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
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Kubota S, Nakasuga K, Maruyama T, Ueda N, Ito H, Kaji Y, Harada M. A unipolar coronary sinus mapping study of patients with left-sided atrioventricular accessory pathways. Int Heart J 2005; 46:657-67. [PMID: 16157957 DOI: 10.1536/ihj.46.657] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
So-called unipolar 'PQS pattern' is widely accepted as a hallmark of successful catheter ablation of the left-sided atrioventricular accessory pathway. However, the unipolar nature of the electrogram and the site-dependent appearance of this characteristic pattern are poorly understood. Therefore, unipolar coronary sinus (CS) mapping was performed using a multipolar fine electrode in patients with Wolff-Parkinson-White (WPW) syndrome associated with an antegrade left-sided accessory pathway (case group) and those with a concealed left-sided accessory pathway or atrioventricular nodal reentrant tachycardia (control group) under sinus rhythm and fixed high right atrial, CS ostial, and distal pacing. In both groups, the unipolar CS atrial electrogram showed intrinsic negative deflection (initial positive followed by negative parts) with considerable variation depending on the recording site. This unipolar configuration of the atrial electrogram was not influenced by different activation sequences during pacing at various sites. The case group exhibited a unipolar 'PQS pattern' at successful ablation sites for the left lateral to anterolateral accessory pathway. However, this was not true for the left posteroseptal accessory pathway, possibly because the negative part of the atrial electrogram distorted the 'PQS pattern' as an intervening dip. In conclusion, the site-dependent variations of the unipolar CS atrial electrogram underlie the limited usefulness of the 'PQS pattern' in left posteroseptal accessory pathway localization.
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Affiliation(s)
- Satoko Kubota
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
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Tanigawa T, Hayashida A, Kamou M, Kohno-Yoshida E, Katsuta H, Kaji Y, Nagafuchi S, Harada M. [A case of metabolic syndrome with coronary artery disease advanced over 13 years. Case report]. Fukuoka Igaku Zasshi 2005; 96:346-50. [PMID: 16316076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
A 61-year-old man was diagnosed with obesity, diabetes mellitus, and hyperlipidemia associated with insulin resistance in 1988. His condition was complicated with asymptomatic coronary artery disease in 1992. His coronary artery disease gradually progressed during the subsequent 13 years of observation, and he underwent percutaneous coronary intervention four times and also received a coronary artery bypass graft. This is a case of metabolic syndrome with multiple risk factors for arteriosclerosis as visceral obesity, insulin resistance, diabetes, hypertension and hyperlipidemia, in which the recent rapid progression of coronary artery disease might be associated with the discontinuation of statin after coronary artery bypass graft, accompanied with hyper-LDL-choleterolemia. Patients with metabolic syndrome require most comprehensive and strict therapies against multiple risk factors.
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Affiliation(s)
- Tomoe Tanigawa
- Department of Medicine and Biosystemic Science, Graduate School of Medical Sciences, Fukuoka Higashi Medical Center Kyushu University
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Tatewaki H, Masuda M, Nishida T, Kaji Y, Ushinohama H, Morita S, Yasui H. Successful treatment of tachycardia-induced cardiomyopathy with LVAD in a 12-year-old boy. Ann Thorac Surg 2005; 80:e5-7. [PMID: 16039171 DOI: 10.1016/j.athoracsur.2005.04.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2004] [Revised: 03/22/2005] [Accepted: 04/06/2005] [Indexed: 11/23/2022]
Abstract
Tachycardia-induced cardiomyopathy is an unusual cardiac disease that is life-threatening if tachycardia is not controlled. We report a 12-year-old boy who suffered from ectopic left atrial tachyarrhythmia that was refractory to medications and caused tachycardia-induced cardiomyopathy with severe heart failure. The patient required a left ventricular assist device (ABIOMED BVS5000 [ABIOMED Inc, Danvers, MA]) as a bridge to recovery. Tachycardia was finally controlled with flecainide while the patient was on left ventricular assist device support. The device was successfully explanted after 28 days of support. The temporary use of a left ventricular assist device was necessary to maintain a good hemodynamic status during the treatment of pharmacological refractory tachycardia, and it allowed a successful bridge to recovery.
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Affiliation(s)
- Hideki Tatewaki
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
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Imaoka I, Kaji Y, Kobashi Y, Wada A, Honjo G, Hayashi M, Yoshida M, Matsuo M. Cystic adenomyosis with florid glandular differentiation mimicking ovarian malignancy. Br J Radiol 2005; 78:558-61. [PMID: 15900064 DOI: 10.1259/bjr/82283833] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
We report a case of cystic adenomyosis, presenting as a huge exophytic cystic mass with florid glandular differentiation. MR findings of the mass mimicked ovarian carcinoma associated with endometriosis. The presence of signal voids bridging the uterus and tumour should suggest a mass of uterine origin. Hyperintense protuberance in a hypointense loculus on T(2) weighted images may suggest benign disease. However, surgical exploration and resection is still required to exclude an ovarian malignancy.
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Affiliation(s)
- I Imaoka
- Department of Radiology, MR Division, Tenri Hospital, 200 Mishima, Tenri, 632-8552, Japan
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