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Kimura T, Miyashita K, Fukamachi I, Fukamachi K, Ogura K, Yokoyama E, Tsunekawa K, Nagasawa T, Ploug M, Yang Y, Song W, Young SG, Beigneux AP, Nakajima K, Murakami M. Quantification of lipoprotein lipase in mouse plasma with a sandwich enzyme-linked immunosorbent assay. J Lipid Res 2024; 65:100532. [PMID: 38608546 PMCID: PMC11017283 DOI: 10.1016/j.jlr.2024.100532] [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: 05/09/2023] [Revised: 03/03/2024] [Accepted: 03/06/2024] [Indexed: 04/14/2024] Open
Abstract
To support in vivo and in vitro studies of intravascular triglyceride metabolism in mice, we created rat monoclonal antibodies (mAbs) against mouse LPL. Two mAbs, mAbs 23A1 and 31A5, were used to develop a sandwich ELISA for mouse LPL. The detection of mouse LPL by the ELISA was linear in concentrations ranging from 0.31 ng/ml to 20 ng/ml. The sensitivity of the ELISA made it possible to quantify LPL in serum and in both pre-heparin and post-heparin plasma samples (including in grossly lipemic samples). LPL mass and activity levels in the post-heparin plasma were lower in Gpihbp1-/- mice than in wild-type mice. In both groups of mice, LPL mass and activity levels were positively correlated. Our mAb-based sandwich ELISA for mouse LPL will be useful for any investigator who uses mouse models to study LPL-mediated intravascular lipolysis.
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Affiliation(s)
- Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan; Clinical Laboratory Center, Gunma University Hospital, Maebashi, Gunma, Japan.
| | | | | | | | - Kazumi Ogura
- Immuno-Biological Laboratories, Fujioka, Gunma, Japan
| | | | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan; Clinical Laboratory Center, Gunma University Hospital, Maebashi, Gunma, Japan
| | - Takumi Nagasawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan; Clinical Laboratory Center, Gunma University Hospital, Maebashi, Gunma, Japan
| | - Michael Ploug
- Finsen Laboratory, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Ye Yang
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Wenxin Song
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Stephen G Young
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA, USA; Department of Human Genetics, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Anne P Beigneux
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Katsuyuki Nakajima
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan; Clinical Laboratory Center, Gunma University Hospital, Maebashi, Gunma, Japan
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Watanabe A, Harimoto N, Araki K, Igarashi T, Tsukagoshi M, Ishii N, Hagiwara K, Tsunekawa K, Murakami M, Shirabe K. Perioperative pancreaticoduodenectomy management strategy focusing on postoperative early drain colonization. Surg Today 2024:10.1007/s00595-024-02810-4. [PMID: 38502211 DOI: 10.1007/s00595-024-02810-4] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Accepted: 01/21/2024] [Indexed: 03/21/2024]
Abstract
PURPOSE Pancreatoduodenectomy (PD) is a highly invasive procedure. Intra-abdominal infections and pancreatic fistulas are strongly correlated complications. In the present study, we identified the risk factors for postoperative early drain colonization (POEDC) and established a perioperative management strategy. METHODS A total of 205 patients who underwent pancreatoduodenectomy were included in the study. POEDC was defined as a positive drain fluid culture before postoperative day (POD) 4. We retrospectively investigated the correlation between POEDC, postoperative outcomes, and clinical factors. RESULTS POEDC was observed in 26 patients (12.6%) with poor postoperative outcomes, including pancreatic fistulas (P < 0.001). A multivariate analysis demonstrated a correlation between these postoperative outcomes and the age (P = 0.002), body mass index (BMI) (P = 0.002), procalcitonin (PCT) level (P < 0.001), and drain amylase level on POD 1 (P = 0.032). Enterococcus was detected most frequently, being found in 15 patients. CONCLUSION We observed a strong correlation between POEDC and poor postoperative outcomes. The BMI, age, and PCT and drain amylase level on POD 1 should be considered POEDC risk factors, with the need to propose an antibiotic perioperative strategy. POEDC control may represent the key to improving postoperative outcomes after PD.
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Affiliation(s)
- Akira Watanabe
- Department of Hepatobiliary and Pancreatic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Norifumi Harimoto
- Department of Hepatobiliary and Pancreatic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan.
| | - Kenichiro Araki
- Department of Hepatobiliary and Pancreatic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takamichi Igarashi
- Department of Hepatobiliary and Pancreatic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Mariko Tsukagoshi
- Department of Hepatobiliary and Pancreatic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Norihiro Ishii
- Department of Hepatobiliary and Pancreatic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Kei Hagiwara
- Department of Hepatobiliary and Pancreatic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Ken Shirabe
- Department of Hepatobiliary and Pancreatic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
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Tsunekawa K, Shoho Y, Ushiki K, Yanagawa Y, Matsumoto R, Shimoda N, Aoki T, Yoshida A, Nakajima K, Kimura T, Murakami M. Author Correction: Assessment of exercise-induced stress via automated measurement of salivary cortisol concentrations and the testosterone-to-cortisol ratio: a preliminary study. Sci Rep 2024; 14:1326. [PMID: 38225258 PMCID: PMC10789745 DOI: 10.1038/s41598-024-51789-y] [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] [Subscribe] [Scholar Register] [Indexed: 01/17/2024] Open
Affiliation(s)
- Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan.
| | - Yoshifumi Shoho
- Faculty of Education, Ikuei University, 1656-1 Kyome-Machi, Takasaki, Gunma, 370-0011, Japan
| | - Kazumi Ushiki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Yoshimaro Yanagawa
- Faculty of Education, Ikuei University, 1656-1 Kyome-Machi, Takasaki, Gunma, 370-0011, Japan
| | - Ryutaro Matsumoto
- Faculty of Education, Ikuei University, 1656-1 Kyome-Machi, Takasaki, Gunma, 370-0011, Japan
| | - Nozomi Shimoda
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Tomoyuki Aoki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Akihiro Yoshida
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Kiyomi Nakajima
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
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Machida H, Hirakawa T, Tsunekawa K, Kimura T, Murakami M, Abe Y. Revised Cut-Off Value of Human Epididymis Protein 4 Enhances Its Use as an Ovarian Tumor Marker. Gynecol Obstet Invest 2023; 88:349-358. [PMID: 37788640 DOI: 10.1159/000534064] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 09/03/2023] [Indexed: 10/05/2023]
Abstract
OBJECTIVES Human epididymis protein 4 (HE4), a protein secreted by ovarian tumors, has been used as an ovarian tumor marker. This study aimed to improve the usefulness of HE4 to detect malignant ovarian tumors by reviewing the cut-off values. DESIGN A retrospective study without intervention was conducted. PARTICIPANTS One hundred forty-nine healthy women (premenopausal, 126; postmenopausal, 23) and 24 patients with ovarian tumors (malignant, 12; benign, 12) participated in the study. SETTING The study used the Department of Obstetrics and Gynecology of a university hospital in Japan and the university hospital as a workplace from 2016 to 2018. METHODS The basic performance of the HE4 assay was evaluated, and the serum HE4 levels of participants were measured. Receiver operating characteristic analysis was performed using the HE4 data of the patients. RESULTS There were no significant differences in HE4 levels between the pre- and postmenopausal groups of healthy women. When the global cut-off values (premenopausal, 70 pmol/L; postmenopausal, 140 pmol/L) were adopted, the clinical sensitivity, specificity, positive predictive value, and negative predictive value were 41.7%, 91.7%, 83.3%, and 61.1%, respectively. Based on the results of the receiver operating characteristic analysis, we set the HE4 cut-off level at 60 pmol/L, regardless of the menopausal status. With the newly set cut-off value, the clinical sensitivity, specificity, positive predictive value, and negative predictive value were 66.7%, 91.7%, 88.9%, and 73.3%, respectively. That is, the clinical sensitivity of HE4 was improved without lowering specificity. LIMITATIONS The small number of subjects and the fact that the health status of the healthy women was evaluated based on questionnaires were limitations to the study. CONCLUSION A clinically useful cut-off value for HE4 as an ovarian tumor marker was established regardless of the menopausal status of the women, with improved clinical sensitivity, positive predictive value, and negative predictive value without lowering specificity. Currently, different cut-off values for HE4 in pre- and postmenopausal women are used globally. The cut-off value for CA125 was the same between pre- and postmenopausal women. Therefore, with the newly established cut-off value, HE4 can be used more conveniently in a non-specialized setting, especially when it is used in combination with CA125.
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Affiliation(s)
- Hiroki Machida
- Department of Laboratory Sciences, Graduate School of Health Sciences, Gunma University, Maebashi, Japan
- Department of Clinical Laboratory, Gunma University Hospital, Maebashi, Japan
| | - Takashi Hirakawa
- Department of Obstetrics and Gynecology, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory, Gunma University Hospital, Maebashi, Japan
- Department of Clinical Laboratory Medicine, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Takao Kimura
- Department of Clinical Laboratory, Gunma University Hospital, Maebashi, Japan
- Department of Clinical Laboratory Medicine, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Masami Murakami
- Department of Clinical Laboratory, Gunma University Hospital, Maebashi, Japan
- Department of Clinical Laboratory Medicine, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Yumiko Abe
- Department of Laboratory Sciences, Graduate School of Health Sciences, Gunma University, Maebashi, Japan
- Department of Medical Technology and Clinical Engineering, Gunma University of Health and Welfare, Maebashi, Japan
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Tsunekawa K, Shoho Y, Ushiki K, Yanagawa Y, Matsumoto R, Shimoda N, Aoki T, Yoshida A, Nakajima K, Kimura T, Murakami M. Assessment of exercise-induced stress via automated measurement of salivary cortisol concentrations and the testosterone-to-cortisol ratio: a preliminary study. Sci Rep 2023; 13:14532. [PMID: 37666925 PMCID: PMC10477232 DOI: 10.1038/s41598-023-41620-5] [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: 05/17/2023] [Accepted: 08/29/2023] [Indexed: 09/06/2023] Open
Abstract
In this study, our aim was to validate whether the automated measurement of salivary testosterone and cortisol concentrations and the testosterone-to-cortisol (T/C) ratio, considering their individual circadian rhythms can be used to assess the stress response of male athletes to different exercise intensities accurately and effectively. We measured the salivary testosterone and cortisol concentrations and their respective serum concentrations that were collected from 20 male long-distance runners via passive drooling in the morning and evening for two consecutive days involving different exercise intensities. An electrochemiluminescence immunoassay was performed to evaluate the salivary testosterone and cortisol concentrations. The results showed a positive correlation between the salivary testosterone and cortisol concentrations and their respective serum concentrations. The participants were divided into two groups: with and without interval training. The interval training group showed a significantly higher rate of change in the salivary cortisol concentration and a significantly lower rate of change in the T/C ratio in the evening interval training on day 1 than lower-intensity running on day 2. Our results indicated that the salivary cortisol concentrations and the T/C ratio could distinguish between exercises at different intensities, which may be beneficial for detecting differences in stress responses among athletes.
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Affiliation(s)
- Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan.
| | - Yoshifumi Shoho
- Faculty of Education, Ikuei University, 1656-1 Kyome-machi, Takasaki, Gunma, 370-0011, Japan
| | - Kazumi Ushiki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Yoshimaro Yanagawa
- Faculty of Education, Ikuei University, 1656-1 Kyome-machi, Takasaki, Gunma, 370-0011, Japan
| | - Ryutaro Matsumoto
- Faculty of Education, Ikuei University, 1656-1 Kyome-machi, Takasaki, Gunma, 370-0011, Japan
| | - Nozomi Shimoda
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Tomoyuki Aoki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Akihiro Yoshida
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Kiyomi Nakajima
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
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Hiramoto S, Miyashita D, Kimura T, Niwa T, Uchida A, Sano M, Murata M, Nagasawa T, Tsunekawa K, Aoki T, Yoshida A, Kato T, Yanagisawa K, Tokue Y, Murakami M. Serological Screening of Immunoglobulin G against SARS-CoV-2 Nucleocapsid and Spike Protein before and after Two Vaccine Doses among Healthcare Workers in Japan. TOHOKU J EXP MED 2022; 257:57-64. [PMID: 35354694 DOI: 10.1620/tjem.2022.j017] [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] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Suguru Hiramoto
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine.,Clinical Laboratory Center, Gunma University Hospital
| | - Daichi Miyashita
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine.,Clinical Laboratory Center, Gunma University Hospital
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine.,Clinical Laboratory Center, Gunma University Hospital
| | - Takahiko Niwa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine.,Clinical Laboratory Center, Gunma University Hospital
| | - Azusa Uchida
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine.,Clinical Laboratory Center, Gunma University Hospital
| | - Maika Sano
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine.,Clinical Laboratory Center, Gunma University Hospital
| | - Mai Murata
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine.,Clinical Laboratory Center, Gunma University Hospital
| | - Takumi Nagasawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine.,Clinical Laboratory Center, Gunma University Hospital
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine.,Clinical Laboratory Center, Gunma University Hospital
| | - Tomoyuki Aoki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine.,Clinical Laboratory Center, Gunma University Hospital
| | - Akihiro Yoshida
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine.,Clinical Laboratory Center, Gunma University Hospital
| | - Toshimitsu Kato
- Infection Control and Prevention Center, Gunma University Hospital
| | - Kunio Yanagisawa
- Infection Control and Prevention Center, Gunma University Hospital
| | - Yutaka Tokue
- Infection Control and Prevention Center, Gunma University Hospital
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine.,Clinical Laboratory Center, Gunma University Hospital
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Suda I, Kimura T, Niwa T, Tsunekawa K, Araki O, Yanagisawa K, Tokue Y, Murakami M. Comparison of Six Immunoassays for Assaying Levels of Immunoglobulin G against the Nucleocapsid and Spike Proteins of SARS-CoV-2. J Clin Diagn Res 2022. [DOI: 10.7860/jcdr/2022/56323.16644] [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: 11/24/2022]
Abstract
Introduction: Assay kits for detection of Immunoglobulin G (IgG) against the nucleocapsid protein (anti-nucleocapsid IgG) and spike proteins (anti-spike IgG) of Severe Acute Respiratory Syndrome Corona Virus 2 (SARS-CoV-2) were commercially provided by several manufacturers. These assay kits should be verified by measuring the same sample. Aim: To compare the diagnostic value of three Coronavirus Disease-2019 (COVID-19) kits in evaluating six immunoassays developed by three manufacturers (Abbott, Euglena, and Roche) to detect anti-nucleocapsid IgG and anti-spike IgG. Materials and Methods: Present study was an observational cross-sectional study conducted from June 2020 to December 2020. Antibody titers for anti-nucleocapsid IgG and anti-spike IgG among 429 Healthcare Workers (HCWs) in a Tone Central Hospital, Japan where a nosocomial infection of the COVID19 occurred were measured by six immunoassays with kits developed by three different manufacturers. The sensitivity and specificity of each kit was compared to real-time Reverse Transcription-Polymerase Chain Reaction (RT-qPCR). Results: Six of the HCWs tested positive for SARS-CoV-2 via RT-qPCR, and the rest tested negative. The severity of COVID19 among these six HCWs ranged from mild to moderate. The sensitivity and specificity values against RT-qPCR were, 100% and 99.5% for Abbott, 83.3% and 100% for Euglena, and 100% and 100% for Roche when using the nucleocapsid protein assay and 100% and 99.8% for Abbott, 100% and 100% for Euglena, and 100% and 100% for Roche when using the spike protein assay kit. Conclusion: The commercial kits provided by three manufacturers reflected the immune status of individuals. There were no major differences in the performance of these test kits. Discordant results with the antibody titer for anti-nucleocapsid IgG and anti-spike IgG were detected by using assay kits provided by Abbott and Euglena. To evaluate the past history of COVID-19, it should be noted that the single measurement of anit-nucleocapsid IgG or anti-spike IgG could not exclude false negative or positives.
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Martha L, Kimura T, Yoshida A, Tsunekawa K, Aoki T, Araki O, Nara M, Ogiwara T, Sumino H, Murakami M. Association between insulin resistance and cardinal rheological parameters in young healthy Japanese individuals during 75 g oral glucose tolerance test. Endocr Metab Immune Disord Drug Targets 2021; 22:125-132. [PMID: 34303334 DOI: 10.2174/1871530321666210720124554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 05/19/2021] [Accepted: 05/19/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Insulin resistance is a well-known predictor and risk factor for Type 2 Diabetes Mellitus (T2DM). Higher hematocrit induced by higher insulin resistance affects blood rheology. OBJECTIVE This study intended to reveal the association between indices of insulin resistance and hemorheological parameters during a 75 g oral glucose tolerance test (75-g OGTT). METHODS A total of 575 healthy young Japanese participants took 75-g OGTT. We then analyzed the association between insulin resistance indices and hematological parameters. RESULTS The Homeostasis Model Assessment of Insulin Resistance (HOMA-IR) was significantly correlated with hematocrit (Ht), hemoglobin (Hb), Red Blood Cell (RBC), White Blood Cell (WBC), platelet count, lipid parameters, and Body Mass Index (BMI). The Matsuda index was negatively correlated with RBC count, WBC count, platelet count, Total Cholesterol (TC), Low-Density Lipoprotein-Cholesterol (LDL-C), triglyceride (TG), and positively correlated with High-Density Lipoprotein-Cholesterol (HDL-C). The disposition index was negatively correlated with Hb, RBC count, LDL-C, and BMI, while remaining positively correlated with HDL-C. The Homeostasis Model Assessment of beta cell (HOMA- IR ) was positively correlated with WBC count, platelet count, TC, LDL-C, and TG. The insulinogenic index was positively correlated with WBC count, platelet count, and TC. Multiple regression analysis revealed that HOMA-IR was independently associated with TG, and the Matsuda index was independently associated with TG, WBC count, and platelet count. The insulinogenic index was independently associated with WBC count. CONCLUSION Cardinal rheological parameters reflected insulin resistance and were released even in the young, healthy Japanese individuals within the physiological range of glycemic control.
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Affiliation(s)
- Larasati Martha
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Japan
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Japan
| | - Akihiro Yoshida
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Japan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Japan
| | - Tomoyuki Aoki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Japan
| | - Osamu Araki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Japan
| | - Makoto Nara
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Japan
| | - Takayuki Ogiwara
- Internal Medicine, Division of Endocrinology and Diabetes, Saiseikai Maebashi Hospital, Japan
| | - Hiroyuki Sumino
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Japan
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Nagasawa T, Kimura T, Yoshida A, Tsunekawa K, Araki O, Ushiki K, Ishigaki H, Shoho Y, Suda I, Hiramoto S, Murakami M. Konjac Glucomannan Attenuated Triglyceride Metabolism during Rice Gruel Tolerance Test. Nutrients 2021; 13:nu13072191. [PMID: 34202167 PMCID: PMC8308303 DOI: 10.3390/nu13072191] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/16/2021] [Accepted: 06/22/2021] [Indexed: 11/21/2022] Open
Abstract
In a recent study, we showed that konjac glucomannan (KGM) inhibits rice gruel-induced postprandial increases in plasma glucose and insulin levels. To extend this research, we investigated the effects of KGM addition to rice gruel on pre- and postprandial concentrations of circulating lipoprotein lipase (LPL), glycosylphosphatidylinositol-anchored high-density lipoprotein-binding protein 1 (GPIHBP1), hepatic triglyceride lipase (HTGL), free fatty acids (FFA), and triglycerides (TG). A total of 13 Japanese men, without diabetes, dyslipidemia, or gastrointestinal diseases, interchangeably ingested rice gruel containing no KGM (0%G), rice gruel supplemented with 0.4% KGM (0.4%G), and rice gruel supplemented with 0.8% KGM (0.8%G), every Sunday for 3 weeks. Blood samples were obtained at baseline and at 30, 60, and 120 min after ingestion to measure the abovementioned lipid parameters. Lipid parameters showed small, but significant, changes. Significant reductions were found in circulating FFA levels among all participants. Circulating TG levels significantly declined at 30 min and then remained nearly constant in the 0.8%G group but exhibited no significant difference in the 0%G and 0.4%G groups. Although circulating levels of LPL and GPIHBP1 significantly decreased in the 0%G and 0.4%G groups, they increased at 120 min in the 0.8%G group. Participants in the 0%G and 0.4%G groups showed significant decreases in circulating HTGL levels, which was not observed in the 0.8%G group. Our results demonstrate the novel pleiotropic effects of KGM. Supplementation of rice gruel with KGM powder led to TG reduction accompanied by LPL and GPIHBP1 elevation and HTGL stabilization, thereby attenuating TG metabolism.
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Affiliation(s)
- Takumi Nagasawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan; (T.N.); (A.Y.); (K.T.); (O.A.); (K.U.); (H.I.); (Y.S.); (I.S.); (S.H.); (M.M.)
- Clinical Laboratory Center, Gunma University Hospital, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan; (T.N.); (A.Y.); (K.T.); (O.A.); (K.U.); (H.I.); (Y.S.); (I.S.); (S.H.); (M.M.)
- Clinical Laboratory Center, Gunma University Hospital, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan
- Center for Food Science and Wellness, Gunma University, Aramaki-machi 4-2, Meabshi 371-8510, Gunma, Japan
- Correspondence: ; Tel.: +81-27-220-8576; Fax: +81-27-220-8583
| | - Akihiro Yoshida
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan; (T.N.); (A.Y.); (K.T.); (O.A.); (K.U.); (H.I.); (Y.S.); (I.S.); (S.H.); (M.M.)
- Clinical Laboratory Center, Gunma University Hospital, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan
- Center for Food Science and Wellness, Gunma University, Aramaki-machi 4-2, Meabshi 371-8510, Gunma, Japan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan; (T.N.); (A.Y.); (K.T.); (O.A.); (K.U.); (H.I.); (Y.S.); (I.S.); (S.H.); (M.M.)
- Clinical Laboratory Center, Gunma University Hospital, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan
- Center for Food Science and Wellness, Gunma University, Aramaki-machi 4-2, Meabshi 371-8510, Gunma, Japan
| | - Osamu Araki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan; (T.N.); (A.Y.); (K.T.); (O.A.); (K.U.); (H.I.); (Y.S.); (I.S.); (S.H.); (M.M.)
| | - Kazumi Ushiki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan; (T.N.); (A.Y.); (K.T.); (O.A.); (K.U.); (H.I.); (Y.S.); (I.S.); (S.H.); (M.M.)
- Clinical Laboratory Center, Gunma University Hospital, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan
| | - Hirotaka Ishigaki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan; (T.N.); (A.Y.); (K.T.); (O.A.); (K.U.); (H.I.); (Y.S.); (I.S.); (S.H.); (M.M.)
| | - Yoshifumi Shoho
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan; (T.N.); (A.Y.); (K.T.); (O.A.); (K.U.); (H.I.); (Y.S.); (I.S.); (S.H.); (M.M.)
| | - Itsumi Suda
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan; (T.N.); (A.Y.); (K.T.); (O.A.); (K.U.); (H.I.); (Y.S.); (I.S.); (S.H.); (M.M.)
- Clinical Laboratory Center, Gunma University Hospital, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan
| | - Suguru Hiramoto
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan; (T.N.); (A.Y.); (K.T.); (O.A.); (K.U.); (H.I.); (Y.S.); (I.S.); (S.H.); (M.M.)
- Clinical Laboratory Center, Gunma University Hospital, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan; (T.N.); (A.Y.); (K.T.); (O.A.); (K.U.); (H.I.); (Y.S.); (I.S.); (S.H.); (M.M.)
- Clinical Laboratory Center, Gunma University Hospital, Showa-machi 3-39-22, Meabshi 371-8511, Gunma, Japan
- Center for Food Science and Wellness, Gunma University, Aramaki-machi 4-2, Meabshi 371-8510, Gunma, Japan
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10
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Tsunekawa K, Matsumoto R, Ushiki K, Martha L, Shoho Y, Yanagawa Y, Ishigaki H, Yoshida A, Araki O, Nakajima K, Kimura T, Murakami M. Significance of serum branched-chain amino acid to tyrosine ratio measurement in athletes with high skeletal muscle mass. BMC Sports Sci Med Rehabil 2021; 13:1. [PMID: 33397493 PMCID: PMC7784282 DOI: 10.1186/s13102-020-00229-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 12/21/2020] [Indexed: 11/10/2022]
Abstract
BACKGROUND Few nutritional markers reflect the hypermetabolic state of athletes with high levels of skeletal muscle. Although branched-chain amino acids (BCAA) play crucial roles in protein metabolism in skeletal muscle, the relationship between skeletal muscle mass and amino acid imbalances caused by the metabolism of BCAA and aromatic amino acids remains unclear. The aim of this study is to test the hypothesis that athletes with high levels of skeletal muscle mass have plasma amino acid imbalances, assessed by serum BCAA to tyrosine ratio (BTR) which can be measured conveniently. METHODS The study enrolled 111 young Japanese men: 70 wrestling athletes and 41 controls. None of them were under any medications, extreme dietary restrictions or intense exercise regimens. Each participant's body composition, serum concentrations of albumin and rapid turnover proteins including transthyretin and transferrin, BTR, and thyroid function were assessed. RESULTS Compared to the controls, the athletes had significantly higher skeletal muscle index (SMI) (p < 0.001), and lower serum albumin concentration (p < 0.001) and BTR (p < 0.001). Kruskal-Wallis tests showed that serum albumin concentration and BTR were significantly lower in the participants with higher SMI. Serum albumin concentration and BTR were inversely correlated with SMI by multiple regression analysis (logarithmic albumin, β = - 0.358, p < 0.001; BTR, β = - 0.299, p = 0.001). SMI was inversely and transthyretin was positively correlated with serum albumin (SMI, β = - 0.554, p < 0.001; transthyretin, β = 0.379, p < 0.001). Serum concentration of free 3,5,3'-triiodothyronine (FT3) was inversely correlated with BTR, and, along with SMI and albumin, was independent predictor of BTR (SMI, β = - 0.321, p < 0.001; FT3, β = - 0.253, p = 0.001; logarithmic albumin, β = 0.261, p = 0.003). However, FT3 was not correlated with SMI or serum albumin. Serum concentrations of rapid turnover proteins were not correlated with BTR. CONCLUSIONS Increased skeletal muscle mass enhances the circulating amino acid imbalances, and is independently facilitated by thyroid hormones. Serum BTR may be a useful biomarker to assess the hypermetabolic state of wrestling athletes with high levels of skeletal muscle.
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Affiliation(s)
- Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan.
| | - Ryutaro Matsumoto
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan.,Graduate School of Health and Sport Science, Nippon Sport Science University, Yokohama, 227-0033, Japan
| | - Kazumi Ushiki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
| | - Larasati Martha
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
| | - Yoshifumi Shoho
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan.,Faculty of Education, Ikuei University, Takasaki, 370-0011, Japan
| | - Yoshimaro Yanagawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan.,Faculty of Education, Ikuei University, Takasaki, 370-0011, Japan
| | - Hirotaka Ishigaki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan.,Department of Medical Technology, Faculty of Health Science, Gunma Paz University, Takasaki, 370-0006, Japan
| | - Akihiro Yoshida
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
| | - Osamu Araki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
| | - Kiyomi Nakajima
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
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11
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Sakamaki K, Tsunekawa K, Ishiyama N, Kudo M, Ando K, Akuzawa M, Nakajima K, Shimomura Y, Araki O, Kimura T, Murakami M. Association between high normal-range thyrotropin concentration and carotid intima-media thickness in euthyroid premenopausal, perimenopausal and postmenopausal women. Maturitas 2020; 144:29-36. [PMID: 33358205 DOI: 10.1016/j.maturitas.2020.10.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 07/24/2020] [Accepted: 10/30/2020] [Indexed: 02/05/2023]
Abstract
OBJECTIVE There are currently no established cutoff levels for thyrotropin (TSH) within the reference intervals associated with carotid atherosclerosis to prevent the onset of cardiovascular diseases. The present study aimed to determine the TSH cutoff level associated with carotid maximum intima-media thickness (max IMT) in euthyroid premenopausal, perimenopausal and postmenopausal women. STUDY DESIGN We conducted a cross-sectional study of 468 euthyroid women who had not been treated for or diagnosed with cardiovascular diseases and/or metabolic disorders among 1221 Japanese women who participated in a comprehensive medical examination at the Hidaka Hospital, Japan. Participants' weight, blood pressure, plasma glucose, serum lipoprotein, free thyroxine and TSH were measured and an interview about menstruation was conducted. Carotid ultrasonography was performed to determine max IMT. RESULTS Max IMT significantly increased stepwise as menopausal status progressed (p < 0.001). Serum TSH levels were significantly higher in participants with carotid plaques, defined as max IMT ≥1.1 mm (p = 0.038), and were independently associated with the presence of carotid plaque using multivariate logistic regression analysis (β =1.218, p = 0.036). In postmenopausal women, significantly higher carotid max IMT values were observed in women with serum TSH ≥2.5 μIU/mL compared with women with concentrations <2.5 μIU/mL (p = 0.018) without elevated total cholesterol and low-density lipoprotein cholesterol concentrations. These differences were not observed in premenopausal women. CONCLUSIONS Laboratory finding of serum TSH concentration ≥2.5 μIU/mL may be useful to assess risk of atherosclerosis, especially in postmenopausal women.
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Affiliation(s)
- Koji Sakamaki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8511, Japan; Center for Health Control, Hidaka Hospital, 886 Nakao-machi, Takasaki, Gunma, 370-0001, Japan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8511, Japan.
| | - Nobuyoshi Ishiyama
- Diabetes and Metabolic Disease Research Center, Hidaka Hospital, 886 Nakao-machi, Takasaki, Gunma, 370-0001, Japan
| | - Mizuho Kudo
- Center for Health Control, Hidaka Hospital, 886 Nakao-machi, Takasaki, Gunma, 370-0001, Japan
| | - Kimiko Ando
- Center for Health Control, Hidaka Hospital, 886 Nakao-machi, Takasaki, Gunma, 370-0001, Japan
| | - Masako Akuzawa
- Center for Health Control, Hidaka Hospital, 886 Nakao-machi, Takasaki, Gunma, 370-0001, Japan
| | - Katsuyuki Nakajima
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8511, Japan; Center for Health Control, Hidaka Hospital, 886 Nakao-machi, Takasaki, Gunma, 370-0001, Japan
| | - Yohnosuke Shimomura
- Diabetes and Metabolic Disease Research Center, Hidaka Hospital, 886 Nakao-machi, Takasaki, Gunma, 370-0001, Japan
| | - Osamu Araki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8511, Japan
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12
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Mori M, Aoyagi K, Tomoda T, Ishikawara F, Sakamoto S, Myochin H, Kuga M, Kozaki D, Ohshima N, Izumi T, Itabashi H, Shoho Y, Yoshida A, Tsunekawa K, Kimura T, Murakami M. Simultaneous capillary electrophoresis of anions and cations in a single injection using an anion exchanger-modified capillary for determination of salivary ions in combination with statistical analyses. J Chromatogr A 2020; 1635:461647. [PMID: 33291035 DOI: 10.1016/j.chroma.2020.461647] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 10/23/2020] [Accepted: 10/26/2020] [Indexed: 10/23/2022]
Abstract
This paper describes the simultaneous capillary electrophoresis (CE) of anions and cations using an anion exchange-modified capillary, which was prepared by chemical coating with a cationic silylating reagent, and its application to saliva analysis. The CE method provides high-throughput (5 min for a single sample injection) analysis by generating a high-velocity electroosmotic flow at pH 3.0-3.5. The detection limits at a signal-to-noise ratio of 3 ranged from 1.2 to 18 μM for anions and 1.0 to 2.7 μM for cations. The relative standard deviations for the migration times and peak areas of analytes (n = 4) ranged from 0.05% to 0.40% and 0.94% to 4.7%, respectively. The CE system was used to analyze 11 common ions in saliva samples collected from long-distance runners and sedentary university students before and after running for a set distance or a set time. Interestingly, the SCN- concentrations decreased in the saliva samples of all 14 athletes and 16 sedentary students after running. Furthermore, when the concentrations of the analyzed ions were compared with that of cortisol as a typical stress marker by multiple regression analysis, SCN- and NO3- in saliva samples from the two subject groups strongly correlated with cortisol levels, as determined by an electrochemiluminescence immunoassay. This study improves our knowledge of both the analytical methodology for CE and statistical methods for identifying common ions that could be used as physical stress markers.
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Affiliation(s)
- Masanobu Mori
- Department of Chemistry and Life Science, Faculty of Science and Technology, Kochi University, 2-5-1, Akebono-cho, Kochi, 780-8520, Japan.
| | - Keisuke Aoyagi
- Department of Chemical Engineering, Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Toshihiro Tomoda
- Department of Chemical Engineering, Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Fumi Ishikawara
- Department of Chemical Engineering, Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Shou Sakamoto
- Department of Chemical Engineering, Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Hironori Myochin
- Department of Chemistry and Life Science, Faculty of Science and Technology, Kochi University, 2-5-1, Akebono-cho, Kochi, 780-8520, Japan
| | - Midori Kuga
- Department of Chemistry and Life Science, Faculty of Science and Technology, Kochi University, 2-5-1, Akebono-cho, Kochi, 780-8520, Japan
| | - Daisuke Kozaki
- Department of Chemistry and Life Science, Faculty of Science and Technology, Kochi University, 2-5-1, Akebono-cho, Kochi, 780-8520, Japan
| | - Noriyasu Ohshima
- Department of Biochemistry, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Takashi Izumi
- Department of Biochemistry, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan; Faculty of Health Care, Teikyo Heisei University, 2-51-4, Higashiikebukuro, Toshima-ku, Tokyo, 170-8445, Japan
| | - Hideyuki Itabashi
- Department of Chemical Engineering, Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Yoshifumi Shoho
- Faculty of Education, Ikuei University, 1656-1, Kyoume-machi, Takasaki, Gunma 370-0011, Japan
| | - Akihiro Yoshida
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
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13
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Ushiki K, Tsunekawa K, Shoho Y, Martha L, Ishigaki H, Matsumoto R, Yanagawa Y, Nakazawa A, Yoshida A, Nakajima K, Araki O, Kimura T, Murakami M. Assessment of exercise-induced stress by automated measurement of salivary cortisol concentrations within the circadian rhythm in Japanese female long-distance runners. Sports Med Open 2020; 6:38. [PMID: 32804358 PMCID: PMC7431506 DOI: 10.1186/s40798-020-00269-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 02/12/2020] [Accepted: 08/04/2020] [Indexed: 11/30/2022]
Abstract
Background Overtraining syndrome, caused by prolonged excessive stress, results in reduced performance and cortisol responsiveness in athletes. It is necessary to collect saliva samples sequentially within circadian rhythm for assessing exercise stress by measuring cortisol concentrations, and automated cortisol measurements using electrochemiluminescence immunoassay (ECLIA) may be useful for measuring a large number of saliva samples. In this study, we evaluated the appropriate use of cortisol-based exercise stress assessment within the circadian rhythm, which may diagnose and prevent overtraining syndrome in athletes. Methods We collected saliva and sera from 54 healthy participants and analyzed the correlation between salivary cortisol concentrations measured by ECLIA and enzyme-linked immunosorbent assay (ELISA) or serum cortisol analysis. We also collected saliva continuously from 12 female long-distance runners on 2 consecutive days involving different intensities and types of exercise early in the morning and in the afternoon and measured salivary cortisol concentrations using ECLIA. Each exercise intensity of runners was measured by running velocities, Borg Scale score, and rate of change in the pulse rate by exercise. Results ECLIA-based salivary cortisol concentrations correlated positively with those detected by ELISA (ρ = 0.924, p < 0.001) and serum cortisol (ρ = 0.591, p = 0.001). In long-distance runners, circadian rhythm of salivary cortisol, including the peak after waking and the decrease promptly thereafter, were detected on both days by continuous saliva sampling. The rates of change in salivary cortisol concentrations were significantly lower after an early morning exercise than after an afternoon exercise on both days (day 1, p = 0.002, and day 2, p = 0.003). In the early morning exercise, the rate of change in salivary cortisol concentration was significantly higher on day 1 than on day 2 (p = 0.034), similar to a significant difference in running velocities (p = 0.001). Conclusions Our results suggest that automated ECLIA-based salivary cortisol measurements are able to detect the athletes’ circadian rhythm and compare the exercise stress intensities at the same times on different days, even in the early morning, possibly leading to the prevention of overtraining syndrome.
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Affiliation(s)
- Kazumi Ushiki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi Maebashi, Gunma, 371-8511, Japan.,Clinical Laboratory Center, Gunma University Hospital, 3-39-15 Showa-machi Maebashi, Gunma, 371-8511, Japan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi Maebashi, Gunma, 371-8511, Japan. .,Clinical Laboratory Center, Gunma University Hospital, 3-39-15 Showa-machi Maebashi, Gunma, 371-8511, Japan.
| | - Yoshifumi Shoho
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi Maebashi, Gunma, 371-8511, Japan.,Faculty of Education, Ikuei University, 1-7-1 Tonya-machi Takasaki, Gunma, 370-0006, Japan
| | - Larasati Martha
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi Maebashi, Gunma, 371-8511, Japan
| | - Hirotaka Ishigaki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi Maebashi, Gunma, 371-8511, Japan.,Department of Medical Technology, Faculty of Health Science, Gunma Paz University, 1-7-1 Tonya-machi Takasaki, Gunma, 370-0006, Japan
| | - Ryutaro Matsumoto
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi Maebashi, Gunma, 371-8511, Japan
| | - Yoshimaro Yanagawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi Maebashi, Gunma, 371-8511, Japan.,Faculty of Education, Ikuei University, 1-7-1 Tonya-machi Takasaki, Gunma, 370-0006, Japan
| | - Asuka Nakazawa
- Clinical Laboratory Center, Gunma University Hospital, 3-39-15 Showa-machi Maebashi, Gunma, 371-8511, Japan
| | - Akihiro Yoshida
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi Maebashi, Gunma, 371-8511, Japan
| | - Kiyomi Nakajima
- Clinical Laboratory Center, Gunma University Hospital, 3-39-15 Showa-machi Maebashi, Gunma, 371-8511, Japan
| | - Osamu Araki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi Maebashi, Gunma, 371-8511, Japan
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi Maebashi, Gunma, 371-8511, Japan.,Clinical Laboratory Center, Gunma University Hospital, 3-39-15 Showa-machi Maebashi, Gunma, 371-8511, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi Maebashi, Gunma, 371-8511, Japan.,Clinical Laboratory Center, Gunma University Hospital, 3-39-15 Showa-machi Maebashi, Gunma, 371-8511, Japan
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14
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Yoshida A, Kimura T, Tsunekawa K, Araki O, Ushiki K, Ishigaki H, Shoho Y, Suda I, Hiramoto S, Murakami M. Glucomannan Inhibits Rice Gruel-Induced Increases in Plasma Glucose and Insulin Levels. Ann Nutr Metab 2020; 76:259-267. [PMID: 32659777 DOI: 10.1159/000508674] [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] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 05/08/2020] [Indexed: 11/19/2022]
Abstract
OBJECTIVE Given the association between diabetes suppression and inhibition of diet-induced elevation in glucose and insulin, we investigated the effects of adding glucomannan to rice gruel on pre- and postprandial glucose and insulin concentrations. METHODS A total of 25 Japanese subjects without a history of diabetes or gastrointestinal disease (all males; aged 37-60 years; body mass index 20.4-31.6) participated in this study. Subjects received a 75-g oral glucose tolerance test (75gOGTT) and rice gruel containing 0, 0.4, or 0.8% of glucomannan. Blood samples were then obtained at preload and at 30, 60, and 120 min after receiving 75 g of glucose or rice gruel with or without glucomannan. RESULTS After the 75gOGTT, 8 subjects had normal glucose tolerance (NGT), whereas 17 showed a borderline pattern. Moreover, our data showed that greater amounts of glucomannan promoted lesser 30-min postload plasma glucose and insulin levels, with differences being larger in the borderline group than in the NGT group. CONCLUSIONS Glucomannan dose-dependently inhibited the rice gruel-induced increase in 30-min postprandial plasma glucose and insulin levels. Furthermore, greater inhibitory effects on glucose and insulin elevation were observed in the borderline group than in the NGT group.
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Affiliation(s)
- Akihiro Yoshida
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Japan.,Gunma University Center for Food Science and Wellness, Maebashi, Japan
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Japan, .,Clinical Laboratory Center, Gunma University Hospital, Maebashi, Japan, .,Gunma University Center for Food Science and Wellness, Maebashi, Japan,
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Japan.,Clinical Laboratory Center, Gunma University Hospital, Maebashi, Japan.,Gunma University Center for Food Science and Wellness, Maebashi, Japan
| | - Osamu Araki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Japan.,Clinical Laboratory Center, Gunma University Hospital, Maebashi, Japan
| | - Kazumi Ushiki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Japan.,Clinical Laboratory Center, Gunma University Hospital, Maebashi, Japan
| | - Hirotaka Ishigaki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Yoshifumi Shoho
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Itsumi Suda
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Japan.,Clinical Laboratory Center, Gunma University Hospital, Maebashi, Japan
| | - Suguru Hiramoto
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Japan.,Clinical Laboratory Center, Gunma University Hospital, Maebashi, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Japan.,Clinical Laboratory Center, Gunma University Hospital, Maebashi, Japan.,Gunma University Center for Food Science and Wellness, Maebashi, Japan
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15
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Ishigaki H, Yoshida A, Araki O, Kimura T, Tsunekawa K, Shoho Y, Nara M, Aoki T, Ogiwara T, Murakami M. Prolonged plasma glucose elevation on oral glucose tolerance test in young healthy Japanese individuals. Endocrinol Diabetes Metab 2020; 3:e00098. [PMID: 31922025 PMCID: PMC6947704 DOI: 10.1002/edm2.98] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 06/06/2019] [Revised: 09/17/2019] [Accepted: 10/06/2019] [Indexed: 12/27/2022] Open
Abstract
AIMS This study aims to assess insulin secretion and resistance through oral glucose tolerance test (OGTT) among young Japanese individuals. SUBJECTS AND METHODS We enrolled 595 young healthy Japanese individuals aged 22-29 years. They underwent an OGTT, and their results were divided into 4 groups (I-IV), according to the time at which their plasma glucose concentration declined below the fasting glucose concentration (30, 60 or 120 minutes or never as groups I, II, III and IV, respectively). RESULTS We classified 575 normal glucose-tolerant subjects into 4 groups (I-IV) with I: 28 (4.9%), II: 120 (20.9%), III: 143 (24.9%) and IV: 284 (49.4%) individuals. The Matsuda, insulinogenic and disposition indices were decreased from groups I to IV. ROC curves of disposition index reflecting the composition of insulin secretion and sensitivity classified the prolonged glucose elevation group (group III + IV) from the rapid glucose lowering group (group II; AUC = 0.847). CONCLUSIONS Even in a young and healthy Japanese individual within the physiological range of glycaemic control, there is a sequential decrease in insulin sensitivity and secretion.
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Affiliation(s)
- Hirotaka Ishigaki
- Department of Clinical Laboratory MedicineGunma University Graduate School of MedicineMaebashiJapan
| | - Akihiro Yoshida
- Department of Clinical Laboratory MedicineGunma University Graduate School of MedicineMaebashiJapan
| | - Osamu Araki
- Department of Clinical Laboratory MedicineGunma University Graduate School of MedicineMaebashiJapan
| | - Takao Kimura
- Department of Clinical Laboratory MedicineGunma University Graduate School of MedicineMaebashiJapan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory MedicineGunma University Graduate School of MedicineMaebashiJapan
| | - Yoshifumi Shoho
- Department of Clinical Laboratory MedicineGunma University Graduate School of MedicineMaebashiJapan
| | - Makoto Nara
- Infection Control and Prevention CenterGunma University HospitalMaebashiJapan
| | - Tomoyuki Aoki
- Department of Clinical Laboratory MedicineGunma University Graduate School of MedicineMaebashiJapan
| | - Takayuki Ogiwara
- Internal MedicineDivision of Endocrinology and DiabetesSaiseikai Maebashi HospitalMaebashiJapan
| | - Masami Murakami
- Department of Clinical Laboratory MedicineGunma University Graduate School of MedicineMaebashiJapan
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16
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Matsumoto R, Tsunekawa K, Shoho Y, Yanagawa Y, Kotajima N, Matsumoto S, Araki O, Kimura T, Nakajima K, Murakami M. Association between skeletal muscle mass and serum concentrations of lipoprotein lipase, GPIHBP1, and hepatic triglyceride lipase in young Japanese men. Lipids Health Dis 2019; 18:84. [PMID: 30947712 PMCID: PMC6449999 DOI: 10.1186/s12944-019-1014-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 03/08/2019] [Indexed: 12/15/2022] Open
Abstract
Background Two important regulators for circulating lipid metabolisms are lipoprotein lipase (LPL) and hepatic triglyceride lipase (HTGL). In relation to this, glycosylphosphatidylinositol anchored high-density lipoprotein binding protein 1 (GPIHBP1) has been shown to have a vital role in LPL lipolytic processing. However, the relationships between skeletal muscle mass and lipid metabolism, including LPL, GPIHBP1, and HTGL, remain to be elucidated. Demonstration of these relationships may lead to clarification of the metabolic dysfunctions caused by sarcopenia. In this study, these relationships were investigated in young Japanese men who had no age-related factors; participants included wrestling athletes with abundant skeletal muscle. Methods A total of 111 young Japanese men who were not taking medications were enrolled; 70 wrestling athletes and 41 control students were included. The participants’ body compositions, serum concentrations of lipoprotein, LPL, GPIHBP1 and HTGL and thyroid function test results were determined under conditions of no extreme dietary restrictions and exercises. Results Compared with the control participants, wrestling athletes had significantly higher skeletal muscle index (SMI) (p < 0.001), higher serum concentrations of LPL (p < 0.001) and GPIHBP1 (p < 0.001), and lower fat mass index (p = 0.024). Kruskal–Wallis tests with Bonferroni multiple comparison tests showed that serum LPL and GPIHBP1 concentrations were significantly higher in the participants with higher SMI. Spearman’s correlation analyses showed that SMI was positively correlated with LPL (ρ = 0.341, p < 0.001) and GPIHBP1 (ρ = 0.309, p = 0.001) concentration. The serum concentrations of LPL and GPIHBP1 were also inversely correlated with serum concentrations of triglyceride (LPL, ρ = − 0.198, p = 0.037; GPIHBP1, ρ = − 0.249, p = 0.008). Serum HTGL concentration was positively correlated with serum concentrations of total cholesterol (ρ = 0.308, p = 0.001), low-density lipoprotein-cholesterol (ρ = 0.336, p < 0.001), and free 3,5,3′-triiodothyronine (ρ = 0.260, p = 0.006), but not with SMI. Conclusions The results suggest that increased skeletal muscle mass leads to improvements in energy metabolism by promoting triglyceride-rich lipoprotein hydrolysis through the increase in circulating LPL and GPIHBP1.
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Affiliation(s)
- Ryutaro Matsumoto
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan.
| | - Yoshifumi Shoho
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan.,Faculty of Education, Ikuei University, Takasaki, 370-0011, Japan
| | - Yoshimaro Yanagawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan.,Faculty of Education, Ikuei University, Takasaki, 370-0011, Japan
| | - Nobuo Kotajima
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan.,School of Medical Technology, Faculty of Health Science, Gunma Paz University, Takasaki, 370-0006, Japan
| | - Shingo Matsumoto
- Graduate School of Health and Sport Science, Nippon Sport Science University, Yokohama, 227-0033, Japan
| | - Osamu Araki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
| | - Katsuyuki Nakajima
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
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17
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Fujiwara C, Uehara A, Sekiguchi A, Uchiyama A, Yamazaki S, Ogino S, Yokoyama Y, Torii R, Hosoi M, Suto C, Tsunekawa K, Murakami M, Ishikawa O, Motegi S. Suppressive Regulation by MFG‐E8 of Latent Transforming Growth Factor β–Induced Fibrosis via Binding to αv Integrin: Significance in the Pathogenesis of Fibrosis in Systemic Sclerosis. Arthritis Rheumatol 2019; 71:302-314. [DOI: 10.1002/art.40701] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Accepted: 08/28/2018] [Indexed: 02/06/2023]
Affiliation(s)
| | - Akihito Uehara
- Gunma University Graduate School of Medicine Maebashi Japan
| | | | | | | | - Sachiko Ogino
- Gunma University Graduate School of Medicine Maebashi Japan
| | - Yoko Yokoyama
- Gunma University Graduate School of Medicine Maebashi Japan
| | - Ryoko Torii
- Gunma University Graduate School of Medicine Maebashi Japan
| | - Mari Hosoi
- Gunma University Graduate School of Medicine Maebashi Japan
| | - Chiaki Suto
- Gunma University Graduate School of Medicine Maebashi Japan
| | | | | | - Osamu Ishikawa
- Gunma University Graduate School of Medicine Maebashi Japan
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Park E, Jung J, Araki O, Tsunekawa K, Park SY, Kim J, Murakami M, Jeong SY, Lee S. Concurrent TSHR mutations and DIO2 T92A polymorphism result in abnormal thyroid hormone metabolism. Sci Rep 2018; 8:10090. [PMID: 29973617 PMCID: PMC6031622 DOI: 10.1038/s41598-018-28480-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 06/21/2018] [Indexed: 12/11/2022] Open
Abstract
Deiodinase 2 (DIO2) plays an important role in thyroid hormone metabolism and its regulation. However, molecular mechanism that regulates DIO2 activity remains unclear; only mutaions in selenocysteine insertion sequence binding protein 2 and selenocysteine tranfer RNA (tRNA[Ser]Sec) are reported to result in decreased DIO2 activity. Two patients with clinical evidence of abnormal thyroid hormone metabolism were identified and found to have TSHR mutations as well as DIO2 T92A single nucleotide polymorphism (SNP). Primary-cultured fibroblasts from one patient present a high level of basal DIO2 enzymatic activity, possibly due to compensation by augmented DIO2 expression. However, this high enzymatic active state yet fails to respond to accelerating TSH. Consequently, TSHR mutations along with DIO2 T92A SNP ("double hit") may lead to a significant reduction in DIO2 activity stimulated by TSH, and thereby may have clinical relevance in a select population of hypothyroidism patients who might benefit from a T3/T4 combination therapy.
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Affiliation(s)
- Eunkuk Park
- Department of Medical Genetics, Ajou University School of Medicine, Suwon, Republic of Korea
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea
| | - Jaehoon Jung
- Department of Internal medicine, Gyeongsang Institute of Health Science, Gyeongsang National University School of Medicine and Gyeongsang National University Changwon Hospital, Changwon, Republic of Korea
| | - Osamu Araki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - So Young Park
- Department of Internal Medicine, Cheil General Hospital and Women's Healthcare Center, Dankook University College of Medicine, Seoul, Republic of Korea
| | - Jeonghyun Kim
- Department of Medical Genetics, Ajou University School of Medicine, Suwon, Republic of Korea
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Seon-Yong Jeong
- Department of Medical Genetics, Ajou University School of Medicine, Suwon, Republic of Korea.
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea.
| | - Sihoon Lee
- Department of Internal Medicine and Laboratory of Genomics and Translational Medicine, Gachon University School of Medicine, Incheon, Republic of Korea.
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Shoho Y, Kimura T, Yanagawa Y, Saito A, Inoue T, Suto C, Tsunekawa K, Araki O, Nara M, Tokue Y, Murakami M. Vaccination Status and Antibody Titers against Rubella and Measles among Japanese Female College Students Majoring in Childcare between 2015 and 2018. TOHOKU J EXP MED 2018; 246:73-79. [DOI: 10.1620/tjem.246.73] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Yoshifumi Shoho
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine
- Department of Childcare, Ikuei Junior College
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine
- Clinical Laboratory Center, Gunma University Hospital
| | - Yoshimaro Yanagawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine
- Department of Childcare, Ikuei Junior College
| | - Ai Saito
- Clinical Laboratory Center, Gunma University Hospital
| | - Toshiya Inoue
- Clinical Laboratory Center, Gunma University Hospital
| | - Chiaki Suto
- Clinical Laboratory Center, Gunma University Hospital
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine
- Clinical Laboratory Center, Gunma University Hospital
| | - Osamu Araki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine
- Clinical Laboratory Center, Gunma University Hospital
| | - Makoto Nara
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine
- Infection Control and Prevention Center, Gunma University Hospital
| | - Yutaka Tokue
- Infection Control and Prevention Center, Gunma University Hospital
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine
- Clinical Laboratory Center, Gunma University Hospital
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20
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Yagi H, Sumino H, Aoki T, Tsunekawa K, Araki O, Kimura T, Nara M, Ogiwara T, Murakami M. Impaired blood rheology is associated with endothelial dysfunction in patients with coronary risk factors. Clin Hemorheol Microcirc 2016; 62:139-50. [PMID: 26444592 PMCID: PMC4927888 DOI: 10.3233/ch-151960] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
To investigate the relationship between blood rheology and endothelial function in patients with coronary risk factors, brachial arterial flow-mediated vasodilatation (FMD), an index of endothelial function and blood passage time (BPT), an index of blood rheology, and fasting blood cell count, glucose metabolism, and plasma fibrinogen, lipid, C-reactive protein, and whole blood viscosity levels were measured in 95 patients with coronary risk factors and 37 healthy controls. Brachial arterial FMD after reactive hyperemia was assessed by ultrasonography. BPT was assessed using the microchannel method. In healthy controls, BPT significantly correlated with FMD (r = - 0.325, p < 0.05), HDL cholesterol (r = - 0.393, p < 0.05), body mass index (BMI; r = 0.530, p < 0.01), and plasma fibrinogen concentration (r = 0.335, p < 0.05). In a multivariate regression analysis adjusted for all clinical variables, BPT remained significantly associated with BMI and fibrinogen, but not with FMD, in healthy controls. In patients with coronary risk factors, BPT significantly correlated with FMD (r = - 0.331, p < 0.01), HDL cholesterol (r = - 0.241, p < 0.05), BMI (r = 0.290, p < 0.01), hematocrit (r = 0.422, p < 0.001), white blood cell count (r = 0.295, p < 0.01), platelet count (r = 0.204, p < 0.05), and insulin (r = 0.210, p < 0.05). In a multivariate regression analysis adjusted for all clinical variables, BPT remained strongly associated with FMD and hematocrit in patients with coronary risk factors. These data indicate that BPT is closely associated with FMD in patients with coronary risk factors and suggest that the measurement of blood rheology using the microchannel method may be useful in evaluating brachial arterial endothelial function as a marker of atherosclerosis in these patients.
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Affiliation(s)
| | - Hiroyuki Sumino
- Corresponding author: Hiroyuki Sumino, MD, Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma 371-8511, Japan. Tel.: +81 27 220 8576; Fax: +81 27 220 8583; E-mail:
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21
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Yagi H, Sumino H, Yoshida K, Aoki T, Tsunekawa K, Araki O, Kimura T, Nara M, Nakajima K, Murakami M. Biological Antioxidant Potential Negatively Correlates With Carotid Artery Intima-Media Thickness. Int Heart J 2016; 57:220-5. [PMID: 26973274 DOI: 10.1536/ihj.15-389] [Citation(s) in RCA: 9] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Oxidative stress is a crucial factor in the pathogenesis and development of cardiovascular disease. Recently, simplified methods for the detection of reactive oxygen species (ROS) using the derivatives of reactive oxygen metabolites (d-ROMs) test as an index of ROS products and the biological antioxidant potential (BAP) test as an index of antioxidant potential have been utilized. These methods are easy to perform, quick, inexpensive since they use small equipment, and provide reliable results compared with established oxidative stress and antioxidant markers. Because oxidative stress has been shown to represent the balance of production of ROS and antioxidant capacity, it is more appropriate to evaluate ROS and antioxidant capacity simultaneously. However, no study has examined the associations among d-ROMs, BAP values, and carotid artery intima-media thickness (IMT) concurrently. Therefore, we studied the associations among d-ROMs, BAP values, and the carotid artery IMT. Carotid artery IMT, blood pressure (BP), fasting circulating d-ROMs, BAP, glucose metabolism, lipid, and C-reactive protein levels were measured in 95 subjects (age: 49.5 ± 13.8 years; men: 41; women: 54), including 42 healthy subjects and 53 patients with hypertension, dyslipidemia, and diabetes mellitus who were not on medication. The results of multiple regression analysis revealed that dependent carotid artery IMT determinants remained significantly associated with age, systolic BP, total cholesterol, and BAP, whereas dependent BAP determinants remained significantly associated with body mass index and carotid artery IMT. BAP was strongly correlated with carotid artery IMT in our cohort. Our results suggest that BAP may be a useful risk marker for carotid atherosclerosis.
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Affiliation(s)
- Hideki Yagi
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine
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22
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Yoshida K, Kimura T, Aoki T, Tsunekawa K, Araki O, Shoho Y, Nara M, Sumino H, Murakami M. Fasting serum insulin levels and insulin resistance are associated with blood rheology in Japanese young adults without diabetes. J Int Med Res 2016; 44:496-507. [PMID: 26920928 PMCID: PMC5536708 DOI: 10.1177/0300060515627561] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [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: 10/03/2015] [Accepted: 12/24/2015] [Indexed: 11/20/2022] Open
Abstract
Objectives To evaluate fasting serum insulin levels and insulin resistance, and their association with blood rheology, in Japanese young adults without diabetes. Methods Blood samples were analysed and blood rheology was estimated using haematological parameters. Whole blood passage time was measured using a Hitachi MC-FAN© microchannel array flow analyser. Results Out of 151 subjects (mean age, 24.1 ± 1.5 years), fasting serum insulin levels and insulin resistance (using homeostasis model assessment-estimated insulin resistance [HOMA-IR]), were positively correlated with longer whole blood passage times and higher values for haematocrit (Hct), haemoglobin (Hb), fibrinogen, body weight, body mass index (BMI), triglycerides, and low-density lipoprotein cholesterol (LDL-C)/high-density lipoprotein cholesterol (HDL-C) ratio, and were negatively correlated with HDL-C. Whole blood passage time correlated with body weight, BMI, LDL-C/HDL-C ratio, Hct, Hb, white blood cell (WBC) count, platelet count, fibrinogen, fasting serum insulin levels, and HOMA-IR. Multiple regression analysis revealed that whole blood passage time was independently associated with Hct, fibrinogen levels, and WBC count. Conclusions Fasting serum insulin levels and insulin resistance were associated with blood rheology, and may influence blood rheology by modulating haematological parameters and lipid parameters in young adults without diabetes.
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Affiliation(s)
- Kensuke Yoshida
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Tomoyuki Aoki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Osamu Araki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Yoshifumi Shoho
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Makoto Nara
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Hiroyuki Sumino
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
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Aoki T, Tsunekawa K, Araki O, Ogiwara T, Nara M, Sumino H, Kimura T, Murakami M. Type 2 Iodothyronine Deiodinase Activity Is Required for Rapid Stimulation of PI3K by Thyroxine in Human Umbilical Vein Endothelial Cells. Endocrinology 2015; 156:4312-24. [PMID: 26284425 PMCID: PMC4606755 DOI: 10.1210/en.2014-1988] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [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: 12/10/2014] [Accepted: 08/12/2015] [Indexed: 02/06/2023]
Abstract
Thyroid hormones (THs) exert a number of physiological effects on the cardiovascular system. Some of the nongenomic actions of T3 are achieved by cross coupling the TH receptor (TR) with the phosphatidylinositol 3-kinase (PI3K)/protein kinase Akt (Akt) pathway. We observed that both T3 and T4 rapidly stimulated Akt phosphorylation and Ras-related C3 botulinum toxin substrate 1 (Rac1) activation, which resulted in cell migration, in a PI3K-dependent manner in human umbilical vein endothelial cells (HUVECs). We identified the expression of type 2 iodothyronine deiodinase (D2), which converts T4 to T3, and TRα1 in HUVECs. D2 activity was significantly stimulated by (Bu)2cAMP in HUVECs. The blockade of D2 activity through transfection of small interfering RNA (siRNA) specific to D2 as well as by addition of iopanoic acid, a potent D2 inhibitor, abolished Akt phosphorylation, Rac activation, and cell migration induced by T4 but not by T3. The inhibition of TRα1 expression by the transfection of siRNA for TRα1 canceled Akt phosphorylation, Rac activation, and cell migration induced by T3 and T4. These findings suggest that conversion of T4 to T3 by D2 is required for TRα1/PI3K-mediated nongenomic actions of T4 in HUVECs, including stimulation of Akt phosphorylation and Rac activation, which result in cell migration.
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Affiliation(s)
- Tomoyuki Aoki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
| | - Osamu Araki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
| | - Takayuki Ogiwara
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
| | - Makoto Nara
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
| | - Hiroyuki Sumino
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
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Aoki T, Yagi H, Sumino H, Tsunekawa K, Araki O, Kimura T, Nara M, Ogiwara T, Nakajima K, Murakami M. Relationship between carotid artery intima-media thickness and small dense low-density lipoprotein cholesterol concentrations measured by homogenous assay in Japanese subjects. Clin Chim Acta 2015; 442:110-4. [PMID: 25603407 DOI: 10.1016/j.cca.2015.01.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 12/26/2014] [Accepted: 01/14/2015] [Indexed: 12/30/2022]
Abstract
BACKGROUND Small dense low-density lipoprotein cholesterol (sdLDL-C) concentrations correlate more strongly with coronary heart disease than other LDL-C and large LDL particle concentrations. We investigated the association between carotid artery intima-media thickness (IMT) and sdLDL-C concentrations in Japanese subjects. METHODS Carotid artery IMT, blood pressure (BP), fasting plasma sdLDL-C, glucose metabolism, lipid, and C-reactive protein concentrations were measured in 97 native Japanese subjects. Carotid artery IMT was assessed by ultrasonography, and sdLDL-C concentrations were measured by a homogenous assay. Pearson's correlation coefficient analyses and multiple regression analyses were used to examine the relationships between carotid artery IMT values, sdLDL-C values, and other clinical variables. RESULTS After multiple regression analysis, including age, sex, body mass index, systolic BP, diastolic BP, fasting plasma glucose, HbA1c, estimated glomerular filtration rate (eGFR), total-C, high-density lipoprotein (HDL)-C, triglyceride, LDL-C, non-HDL-C, large buoyant LDL-C, and sdLDL-C, carotid artery IMT remained significantly associated with age, systolic BP, diastolic BP, and sdLDL-C, whereas sdLDL-C remained significantly associated with age, total-C, HDL-C, triglycerides, and carotid artery IMT. CONCLUSIONS When measured by a homogenous assay, carotid artery IMT may have a closer relationship with sdLDL-C concentrations than other lipid parameters in Japanese subjects. sdLDL-C may be a potentially useful risk marker when assessing carotid artery IMT in Japanese subjects.
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Affiliation(s)
- Tomoyuki Aoki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma 371-8511, Japan
| | - Hideki Yagi
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma 371-8511, Japan
| | - Hiroyuki Sumino
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma 371-8511, Japan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma 371-8511, Japan
| | - Osamu Araki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma 371-8511, Japan
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma 371-8511, Japan
| | - Makoto Nara
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma 371-8511, Japan
| | - Takayuki Ogiwara
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma 371-8511, Japan
| | - Katsuyuki Nakajima
- Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, Maebashi, 3-39-22 Showa-machi, Maebashi, Gunma 371-8511, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma 371-8511, Japan.
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Akiyama S, Ogiwara T, Aoki T, Tsunekawa K, Araki O, Murakami M. Glucagon-like peptide-1 stimulates type 3 iodothyronine deiodinase expression in a mouse insulinoma cell line. Life Sci 2014; 115:22-8. [PMID: 25241124 DOI: 10.1016/j.lfs.2014.09.004] [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] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 08/14/2014] [Accepted: 09/08/2014] [Indexed: 12/25/2022]
Abstract
AIMS The pathophysiological roles of thyroid hormones in glucose metabolism remain uncertain. Type 3 iodothyronine deiodinase (D3) converts thyroxine (T4) and 3,5,3'-triiodothyronine (T3) to 3,3',5'-triiodothyronine (rT3) and 3,3'-diiodothyronine (T2), respectively, inactivating thyroid hormones in a cell-specific fashion. In the present study, we identified D3 expression in MIN6 cells derived from a mouse insulinoma cell line and examined the mechanisms regulating D3 expression in these cells. MAIN METHODS We characterized D3 activity using HPLC analysis, and examined the effect of GLP-1 or exendin-4 on D3 expression and cAMP accumulation in MIN6 cells. We also measured insulin secretion from MIN6 cells exposed to GLP-1 and T3. KEY FINDINGS We identified enzyme activity that catalyzes the conversion of T3 to T2 in MIN6 cells, which showed characteristics compatible with those for D3. D3 mRNA was identified in these cells using RT-PCR analysis. Forskolin rapidly stimulated D3 mRNA and D3 activity. Glucagon-like peptide-1 (GLP-1) increased D3 expression in a dose-dependent manner, and this effect was inhibited by the protein kinase A (PKA) inhibitor H-89. Exendin-4, a GLP-1 receptor agonist, also stimulated D3 expression in MIN6 cells. These results suggest that a cAMP-PKA-mediated pathway participates in GLP-1-stimulated D3 expression in MIN6 cells. Furthermore, GLP-1 stimulated insulin secretion was suppressed by the addition of T3 in MIN6 cells. SIGNIFICANCE Our findings indicate that GLP-1 regulates intracellular T3 concentration in pancreatic β cells via a cAMP-PKA-D3-mediated pathway that may also regulate β-cell function.
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Affiliation(s)
- Shigeo Akiyama
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Takayuki Ogiwara
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Tomoyuki Aoki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Osamu Araki
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan.
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Enokida Y, Shimizu K, Kakegawa S, Atsumi J, Takase Y, Miyamae Y, Nagashima T, Ohtaki Y, Kaira K, Sunaga N, Yanagitani N, Yoshino R, Tsunekawa K, Igai H, Kamiyoshihara M, Usui K, Lezhava A, Tomizawa Y, Ishikawa T, Murakami M, Hayashizaki Y, Takeyoshi I. Single-nucleotide polymorphism (c.309T>G) in the MDM2 gene and lung cancer risk. Biomed Rep 2014; 2:719-724. [PMID: 25054017 DOI: 10.3892/br.2014.305] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 04/21/2014] [Accepted: 06/13/2014] [Indexed: 02/03/2023] Open
Abstract
Murine double minute 2 (MDM2) is a negative regulator of p53. A single-nucleotide polymorphism (SNP) (rs2279744: c.309T>G) in the promoter region of the MDM2 gene has been shown to result in higher levels of MDM2 RNA and protein. Regarding the contribution of c.309T>G in the MDM2 gene to the lung cancer risk, previous studies are conflicting. In order to evaluate the association between c.309T>G and the lung cancer risk, a case-control study was performed. The MDM2 genotypes were determined in 762 lung cancer patients and in 700 cancer-free control subjects using the Smart Amplification Process. Statistical adjustment was performed for gender, age and pack-years of smoking. The distributions of c.309T>G (T/T, T/G, G/G) were 20.1, 49.7, 30.2% in the case group and 21.7, 47.9, 30.4% in the healthy-control group. There were no overall associations between the MDM2 genotypes and the risk of lung cancer [T/G genotype: Adjusted odds ratio (AOR), 1.30; 95% confidence interval (CI), 0.88-1.93; and G/G genotype: AOR, 1.18; 95% CI, 0.78-1.80]. The subgroup analysis of gender, histology, smoking status and epidermal growth factor receptor mutation status also indicated that there was no association with lung cancer. Additionally, the genotypes did not have an effect on the age at the time of diagnosis of lung cancer (P=0.25). In conclusion, the G allele frequency in the lung cancer cases was 0.551, which was similar to other studies. The results of the present study suggest that the c.309T>G is not significantly associated with lung cancer.
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Affiliation(s)
- Yasuaki Enokida
- Department of Thoracic and Visceral Organ Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Kimihiro Shimizu
- Department of Thoracic and Visceral Organ Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Seiichi Kakegawa
- Department of Thoracic and Visceral Organ Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Jun Atsumi
- Department of Thoracic and Visceral Organ Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Yoshiaki Takase
- Department of Thoracic and Visceral Organ Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Yohei Miyamae
- Department of Thoracic and Visceral Organ Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Toshiteru Nagashima
- Department of Thoracic and Visceral Organ Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Yoichi Ohtaki
- Department of Thoracic and Visceral Organ Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Kyoichi Kaira
- Department of Oncology Clinical Development, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Noriaki Sunaga
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Noriko Yanagitani
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Reiko Yoshino
- Department of Internal Medicine, National Hospital Organization Nishi-Gunma Hospital, Shibukawa, Gunma 377-8511, Japan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Hitoshi Igai
- Department of General Thoracic Surgery, Maebashi Red Cross Hospital, Maebashi, Gunma 371-0014, Japan
| | - Mitsuhiro Kamiyoshihara
- Department of General Thoracic Surgery, Maebashi Red Cross Hospital, Maebashi, Gunma 371-0014, Japan
| | - Kengo Usui
- Division of Genomic Technologies, RIKEN Center for Life Science Technologies, Yokohama, Kanagawa 230-0045, Japan
| | - Alexander Lezhava
- Division of Genomic Technologies, RIKEN Center for Life Science Technologies, Yokohama, Kanagawa 230-0045, Japan
| | - Yoshio Tomizawa
- Department of Internal Medicine, National Hospital Organization Nishi-Gunma Hospital, Shibukawa, Gunma 377-8511, Japan
| | - Toshihisa Ishikawa
- NGO Personalized Medicine and Healthcare, Yokohama, Kanagawa 226-0016, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Yoshihide Hayashizaki
- RIKEN Preventive Medicine and Diagnosis Innovation Program, Yokohama, Kanagawa 230-0045, Japan
| | - Izumi Takeyoshi
- Department of Thoracic and Visceral Organ Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
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Tsunekawa K, Murakami M. [Thyroid disease caused by receptor abnormality]. Rinsho Byori 2014; 62:60-66. [PMID: 24724428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Hormone receptor abnormality is a syndrome of an abnormal mechanism caused by defective receptor function in hormone action. Resistance to thyroid hormone is a syndrome in which the responsiveness of the target organ to thyroid hormone is reduced. Resistance to thyroid hormone exhibits unsuppressed thyrotropin(TSH) despite elevated free thyroxin (FT4) and free 3,5,3'-triiodothyronine (FT3), termed the syndrome of the inappropriate secretion of TSH (SITSH). Resistance to thyroid hormone is mainly caused by a mutation in the thyroid hormone receptor beta (TRbeta) gene. Genetic analysis of the TRbeta gene is important to diagnose resistance to thyroid hormone. TSH receptor (TSHR) abnormality is classified as a gain-of-function mutation and loss-of-function mutation. Loss-of-function mutations in the TSHR gene occur as TSH resistance, which is found to have euthyroid hyperthyrotropinemia or hypothyroidism because of the reduced responsiveness of the receptor to TSH. R450H mutation in the TSHR gene is occasionally observed in Japanese patients with TSH resistance. In Japan, it is suggested that analysis of the R450H mutation in the TSHR gene is useful to determine the cause of hyperthyrotropinemia or hypothyroidism.
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28
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Ogiwara T, Araki O, Morimura T, Tsunekawa K, Mori M, Murakami M. A novel mechanism for the inhibition of type 2 iodothyronine deiodinase by tumor necrosis factor α: involvement of proteasomal degradation. Endocr J 2013; 60:1035-45. [PMID: 23719846 DOI: 10.1507/endocrj.ej11-0144] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Thyroxine (T₄) needs to be converted to 3,5,3'-triiodothyronine (T₃) by iodothyronine deiodinase to exert its biological activity. Recent studies revealed the presence of type 2 iodothyronine deiodinase (D2) in human thyroid tissue, human skeletal muscle and other tissues, suggesting that D2 is involved in maintaining plasma T₃ level in human. Tumor necrosis factor α (TNFα) is an inflammatory cytokine of which production is elevated in patients with nonthyroidal illness. Although several lines of evidence suggest the causal role of TNFα in nonthyroidal illness, detailed nature of the effect of TNFα on D2 remains unclear. In the present study, we identified D2 activity and D2 mRNA in TCO-1 cells, which were derived from human anaplastic thyroid carcinoma, and studied the mechanisms involved in the regulation of D2 expression by TNFα. The characteristics of the deiodinating activity in TCO-1 cells were compatible with those of D2 and Northern analysis demonstrated that D2 mRNA was expressed in TCO-1cells. D2 activity and D2 mRNA expression were rapidly increased by dibutyryl cAMP ((Bu)₂cAMP). TNFα showed an inhibitory effect on (Bu)₂cAMP-stimulated D2 activity in spite of little effect on (Bu)₂cAMP-stimulated D2 mRNA expression. MG132, a proteasome inhibitor abolished TNFα suppression of D2 activity whereas BAY11-7082 or 6-amino-4-(4-phenoxyphenylethylamino) quinazoline, inhibitors of nuclear factor-κB (NF-κB) failed to attenuate the effect of TNFα on D2 activity. These data suggest that a posttranslational mechanism through proteasomal degradation but not NF-κB activation is involved in the suppression of D2 by TNFα.
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Affiliation(s)
- Takayuki Ogiwara
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
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29
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Kimura T, Tsunekawa K, Ogiwara T, Tokue Y, Nara M, Inoue T, Obuchi T, Suto C, Ohshima K, Murakami M. Seroprevalence of Measles- and Mumps-Specific Immunoglobulin G among Japanese Healthcare Students Increased during 2007–2012. Jpn J Infect Dis 2013; 66:411-5. [DOI: 10.7883/yoken.66.411] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine
| | - Takayuki Ogiwara
- Infection Control and Prevention Center, Gunma University Hospital
| | - Yutaka Tokue
- Infection Control and Prevention Center, Gunma University Hospital
| | - Makoto Nara
- Infection Control and Prevention Center, Gunma University Hospital
| | - Toshiya Inoue
- Clinical Laboratory Center, Gunma University Hospital
| | - Toshiko Obuchi
- Infection Control and Prevention Center, Gunma University Hospital
| | - Chiaki Suto
- Clinical Laboratory Center, Gunma University Hospital
| | | | - Masami Murakami
- Clinical Laboratory Center, Gunma University Hospital
- Infection Control and Prevention Center, Gunma University Hospital
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine
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30
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Tobari Y, Iijima N, Tsunekawa K, Osugi T, Haraguchi S, Ubuka T, Ukena K, Okanoya K, Tsutsui K, Ozawa H. Identification, localisation and functional implication of 26RFa orthologue peptide in the brain of zebra finch (Taeniopygia guttata). J Neuroendocrinol 2011; 23:791-803. [PMID: 21696471 DOI: 10.1111/j.1365-2826.2011.02179.x] [Citation(s) in RCA: 23] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Several neuropeptides with the C-terminal Arg-Phe-NH(2) (RFa) sequence have been identified in the hypothalamus of a variety of vertebrates. The present study was conducted to isolate novel RFa peptides from the zebra finch brain. Peptides were isolated by immunoaffinity purification using an antibody that recognises avian RFa peptides. The isolated peptide consisted of 25 amino acids with RFa at its C-terminus. The sequence was SGTLGNLAEEINGYNRRKGGFTFRFa. Alignment of the peptide with vertebrate 26RFa has revealed that the identified peptide is the zebra finch 26RFa. We also cloned the precursor cDNA encoding this peptide. Synteny analysis of the gene showed a high conservation of this gene among vertebrates. In addition, we cloned the cDNA encoding a putative 26RFa receptor, G protein-coupled receptor 103 (GPR103) in the zebra finch brain. GPR103 cDNA encoded a 432 amino acid protein that has seven transmembrane domains. In situ hybridisation analysis in the brain showed that the expression of 26RFa mRNA is confined to the anterior-medial hypothalamic area, ventromedial nucleus of the hypothalamus and the lateral hypothalamic area, the brain regions that are involved in the regulation of feeding behaviour, whereas GPR103 mRNA is distributed throughout the brain in addition to the hypothalamic nuclei. When administered centrally in free-feeding male zebra finches, 26RFa increased food intake 24 h after injection without body mass change. Diencephalic GPR103 mRNA expression was up-regulated by fasting for 10 h. Our data suggest that the hypothalamic 26RFa-its receptor system plays an important role in the central control of food intake and energy homeostasis in the zebra finch.
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Affiliation(s)
- Y Tobari
- Department of Anatomy and Neurobiology, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
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31
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Tsunekawa K, Yanagawa Y, Aoki T, Morimura T, Araki O, Ogiwara T, Kawai Y, Mitani Y, Lezhava A, Yanagawa M, Hayashizaki Y, Murakami M. Association between accumulation of visceral fat and the combination of β3 adrenergic receptor Trp64Arg, β2 adrenergic receptor Arg16Gly and uncoupling protein 1 -3826A>G polymorphisms detected by Smart Amplification Process 2. Endocr J 2011; 58:1079-86. [PMID: 21959333 DOI: 10.1507/endocrj.ej11-0148] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
β2 and β3 adrenergic receptors (β2AR, β3AR) and uncoupling protein 1 (UCP1) have been considered as candidate genes for obesity. Although each polymorphism of β3AR Trp64Arg, β2AR Arg16Gly and UCP1 -3826A>G is known to be associated with obesity, the interaction among these polymorphisms is not fully understood. We analyzed β3AR Trp64Arg, β2AR Arg16Gly and UCP1 -3826A>G polymorphisms by the Smart Amplification Process 2 in 222 Japanese subjects without the medication of hypertension, dyslipidemia or diabetes, and investigated the association between the physical and metabolic characteristics and the combination of these polymorphisms. In analysis of the genotypes combination, only the carriers of both β2AR Arg/Arg and UCP1 G/G genotypes had significantly higher waist to hip ratio (p=0.014). In analysis of the alleles combination, a significant difference was observed in waist to hip ratio among the groups stratified by the carrying number of the alleles of β3AR Arg, β2AR Arg and UCP1 G (p=0.026), and the waist to hip ratio was significantly higher in the carriers of four and five risk alleles than in the carriers from zero to three risk alleles (p=0.005). The present study demonstrated the interaction among β3AR Trp64Arg, β2AR Arg16Gly and UCP1 -3826A>G for the accumulation of visceral fat.
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Affiliation(s)
- Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan.
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Kotajima N, Yanagawa Y, Aoki T, Tsunekawa K, Morimura T, Ogiwara T, Nara M, Murakami M. Influence of thyroid hormones and transforming growth factor-β1 on cystatin C concentrations. J Int Med Res 2010; 38:1365-73. [PMID: 20926009 DOI: 10.1177/147323001003800418] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Serum cystatin C concentrations are reported to increase in the hyperthyroid state. Serum concentrations of cystatin C and transforming growth factor-β1 (TGF-β1) were measured in patients with thyroid dysfunction, and the effects of 3,5,3'-tri-iodothyronine (T(3)) and TGF-β1 on cystatin C production in human hepatoblastoma (Hep G2) cells were studied. Serum concentrations of cystatin C and TGF-β1 were significantly higher in patients with Graves' disease compared with control subjects. Significantly positive correlations were observed between thyroid hormones and cystatin C, thyroid hormones and TGF-β1, and TGF-β1 and cystatin C in patients with thyroid dysfunction. Serum concentrations of cystatin C and TGF-β1 decreased after treatment for hyperthyroidism. Cystatin C mRNA levels and cystatin C secretion were increased by T(3) and TGF-β1 in cultured Hep G2 cells. These results suggest that serum cystatin C concentrations increase in patients with hyperthyroidism. The mechanisms for this may involve elevation of serum TGF-β1 levels and the stimulatory effects of T(3) and TGF-β1 on cystatin C production.
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Affiliation(s)
- N Kotajima
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Japan
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Yanagawa Y, Morimura T, Tsunekawa K, Seki K, Ogiwara T, Kotajima N, Machida T, Matsumoto S, Adachi T, Murakami M. Oxidative stress associated with rapid weight reduction decreases circulating adiponectin concentrations. Endocr J 2010; 57:339-45. [PMID: 20179358 DOI: 10.1507/endocrj.k09e-359] [Citation(s) in RCA: 17] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The effect of stress associated with acute weight reduction on adipocytokine production is incompletely understood. In the present study, we have investigated the changes in circulating adipocytokine concentrations and urinary concentrations of stress markers in male collegiate wrestlers during acute weight reduction for a competition. Twenty healthy Japanese male wrestlers (18-22 years of age) who participated in the national collegiate wrestling tournament were studied. Body weight, body fat amount, serum testosterone, serum leptin, serum adiponectin, urinary 8-hydroxy-2'- deoxyguanosine (8-OHdG) and urinary biopyrrins were analyzed during acute weight reduction for the competition. Body weight, body fat amount and the serum concentrations of testosterone, leptin and adiponectin significantly decreased on the day of weigh-in compared with the levels 12 days before weigh-in. In contrast, urinary concentrations of 8-OHdG and biopyrrins significantly increased on the day of weigh-in compared with the concentrations 12 days before weigh-in. A positive correlation was observed between the serum concentrations of adiponectin and testosterone, and a negative correlation was observed between the concentrations of serum adiponectin and urinary biopyrrins. The present results suggest that rapid weight reduction increases the urinary concentrations of stress markers, which is associated with a decrease in serum concentrations of adiponectin.
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Affiliation(s)
- Yoshimaro Yanagawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Japan
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Kanou Y, Hishinuma A, Tsunekawa K, Seki K, Mizuno Y, Fujisawa H, Imai T, Miura Y, Nagasaka T, Yamada C, Ieiri T, Murakami M, Murata Y. Thyroglobulin gene mutations producing defective intracellular transport of thyroglobulin are associated with increased thyroidal type 2 iodothyronine deiodinase activity. J Clin Endocrinol Metab 2007; 92:1451-7. [PMID: 17244789 DOI: 10.1210/jc.2006-1242] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [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: 11/19/2022]
Abstract
CONTEXT Most patients with defective synthesis and/or secretion of thyroglobulin (Tg) present relatively high serum free T3 (FT3) concentrations with disproportionately low free T4 (FT4) resulting in a high FT3/FT4 ratio. The mechanism of this change in FT3/FT4 ratio remains unknown. OBJECTIVE We hypothesize that increased type 2 iodothyronine deiodinase (D2) activity in the thyroid gland may explain the higher FT3/FT4 ratio that is frequently observed in patients with abnormal Tg synthesis. DESIGN We recently identified a compound heterozygous patient (patient A) with a Tg G2356R mutation and one previously described (C1245R) that is known to cause a defect in intracellular transport of Tg. In the current study, after determining the abnormality caused by G2356R, we measured D2 activity as well as its mRNA level in the thyroid gland. We also measured the thyroidal D2 activity in three patients with Tg transport defect and in normal thyroid tissue. RESULTS Morphological and biochemical analysis of the thyroid gland from patient A, complemented by a pulse-chase experiment, revealed that G2356R produces a defect in intracellular Tg transport. D2 activity but not type 1 deiodinase in thyroid glands of patients with abnormal Tg transport was significantly higher than in normal thyroid glands, whereas D2 mRNA level in patient A was comparable with that in normal thyroid glands. Furthermore, there was a positive correlation between D2 activity and FT3/FT4 ratios. CONCLUSION Increased thyroidal D2 activity in the thyroid gland is responsible for the higher FT3/FT4 ratios in patients with defective intracellular Tg transport.
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Affiliation(s)
- Yasuhiko Kanou
- Department of Genetics, Research Institute of Environmental Medicine, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
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35
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Mitani Y, Lezhava A, Kawai Y, Kikuchi T, Oguchi-Katayama A, Kogo Y, Itoh M, Miyagi T, Takakura H, Hoshi K, Kato C, Arakawa T, Shibata K, Fukui K, Masui R, Kuramitsu S, Kiyotani K, Chalk A, Tsunekawa K, Murakami M, Kamataki T, Oka T, Shimada H, Cizdziel PE, Hayashizaki Y. Rapid SNP diagnostics using asymmetric isothermal amplification and a new mismatch-suppression technology. Nat Methods 2007; 4:257-62. [PMID: 17322893 DOI: 10.1038/nmeth1007] [Citation(s) in RCA: 140] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2006] [Accepted: 12/28/2006] [Indexed: 11/09/2022]
Abstract
We developed a rapid single nucleotide polymorphism (SNP) detection system named smart amplification process version 2 (SMAP 2). Because DNA amplification only occurred with a perfect primer match, amplification alone was sufficient to identify the target allele. To achieve the requisite fidelity to support this claim, we used two new and complementary approaches to suppress exponential background DNA amplification that resulted from mispriming events. SMAP 2 is isothermal and achieved SNP detection from whole human blood in 30 min when performed with a new DNA polymerase that was cloned and isolated from Alicyclobacillus acidocaldarius (Aac pol). Furthermore, to assist the scientific community in configuring SMAP 2 assays, we developed software specific for SMAP 2 primer design. With these new tools, a high-precision and rapid DNA amplification technology becomes available to aid in pharmacogenomic research and molecular-diagnostics applications.
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Affiliation(s)
- Yasumasa Mitani
- Genome Exploration Research Group (Genome Network Project Core Group), RIKEN Genomic Sciences Center (GSC), RIKEN Yokohama Institute, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
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Takeuchi Y, Suzuki D, Oda SI, Refetoff S, Seki K, Tsunekawa K, Kasahara T, Murakami M, Murata Y. Unique regulation of thyroid hormone metabolism during fasting in the house musk shrew (Suncus murinus, Insectivora: Soricidae). Gen Comp Endocrinol 2006; 146:236-41. [PMID: 16426605 DOI: 10.1016/j.ygcen.2005.11.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2005] [Revised: 11/16/2005] [Accepted: 11/23/2005] [Indexed: 12/30/2022]
Abstract
The active hormone, 3,3',5-triiodothyronine (T3) is derived from thyroxine (T4) by the action of iodothyronine 5'-deiodinases (5'-D). By now two types of 5'-D have been identified; Type 1 (D1) and type 2 (D2). A relative contribution of these isotypes to the circulating T3 levels in the human remains to be determined whereas a number of reports indicate that, under physiological conditions, D1 plays a major role in maintaining circulating T3 levels in rodents. In both human and rodents, sickness and starvation reduce serum T3 concentration mainly through decrease in D1 activity. Recently, we found that the house musk shrew (Suncus murinus, Insectivora: Soricidae) has a different tissue distribution of D1 activity. Because compared to rodents D1 activity in the shrew was found only in liver at a much reduced level, D2 rather than D1 may play a role in the maintenance of serum T3. Therefore, we questioned how D1 and D2 activities change in fasted shrews and how these changes affect circulating thyroid hormone levels. We thus starved shrews for 24, 48 or 72 h and measured changes in serum concentration of T3, T4, and 3,3',5'-triiodothyronine (reverse T3, rT3) and D1 activities as well as its mRNA expression in liver. D2 activities were also measured in brown adipose tissue (BAT) and cerebral cortex of shrews. Unlike in human and rodents, T3 levels in shrews remained constant during fasting while T4 levels tended to decrease, resulting in an increase in its T3/T4 ratio. On the other hand, changes in rT3 levels were similar to those in human and rodents, being elevated with fasting. D1 mRNA and its activity were significantly reduced in the liver whereas D2 activities in BAT and cerebral cortex were increased by fasting. These results indicated that fasting in shrews also reduced hepatic D1 activity but it did not affect circulating T3 levels. The increased T3/T4 ratio together with increased D2 activity in BAT and cerebral cortex with fasting suggest that D2 rather than D1 is responsible for the maintenance of T3 levels in the house musk shrew.
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Affiliation(s)
- Yoko Takeuchi
- Department of Teratology and Genetics, Division of Molecular and Cellular Adaptation, Research Institute of Environmental Medicine, Nagoya University, Nagoya 464-8601, Japan
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37
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Kasahara T, Tsunekawa K, Seki K, Mori M, Murakami M. Regulation of iodothyronine deiodinase and roles of thyroid hormones in human coronary artery smooth muscle cells. Atherosclerosis 2006; 186:207-14. [PMID: 16140305 DOI: 10.1016/j.atherosclerosis.2005.07.018] [Citation(s) in RCA: 22] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2004] [Revised: 07/04/2005] [Accepted: 07/18/2005] [Indexed: 11/29/2022]
Abstract
Thyroid hormones have been reported to have significant effects on the peripheral vascular system, including relaxation of vascular smooth muscle cells and prevention of atherosclerosis. To exert its biological activity, thyroxine (T4) needs to be converted to 3,5,3'-triiodothyronine (T3) by type 1 and type 2 iodothyronine deiodinases. We have previously identified type 2 iodothyronine deiodinase (D2) expression in cultured human coronary artery smooth muscle cells (hCASMCs). In the present study, we have characterized the regulation of D2 expression in hCASMCs by stable prostacyclin analogue beraprost sodium (BPS) and platelet derived growth factor (PDGF), and the roles of thyroid hormones in the functions of hCASMCs. BPS increased D2 expression, whereas PDGF suppressed BPS stimulated D2 expression without affecting cAMP production in hCASMCs. PDGF increased DNA synthesis, while BPS, T3 or T4 suppressed PDGF stimulated DNA synthesis in hCASMCs. Inhibition of D2 activity by 3,3',5'-triiodothyronine (rT3) partially restored T4 suppression of PDGF stimulated DNA synthesis in hCASMCs. PDGF increased migration activity, whereas BPS, T3 or T4 suppressed PDGF stimulated migration activity of hCASMCs. These results suggest that D2 expression is increased by BPS and suppressed by PDGF in hCASMCs, and that intracellular thyroid hormone activation may be involved in the suppression of DNA synthesis and migration activity of hCASMCs.
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Affiliation(s)
- Takayuki Kasahara
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 Showa-machi, Maebashi 371-8511, Japan
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38
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Tsunekawa K, Onigata K, Morimura T, Kasahara T, Nishiyama S, Kamoda T, Mori M, Morikawa A, Murakami M. Identification and functional analysis of novel inactivating thyrotropin receptor mutations in patients with thyrotropin resistance. Thyroid 2006; 16:471-9. [PMID: 16756469 DOI: 10.1089/thy.2006.16.471] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [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] [Indexed: 11/12/2022]
Abstract
OBJECTIVE We identified and analyzed novel thyrotropin (TSH) receptor mutations in three Japanese families with resistance to TSH. DESIGN The TSH receptor gene was sequenced and the mutations were determined. The mutant TSH receptors were transfected into COS-7 cells, and their functions were analyzed. PATIENTS The patients were compound-heterozygotes for the R450H mutation and novel mutations in the TSH receptor gene. The first patient was a compound-heterozygote for R450H and V473I. The second sibling possessed R450H and R519C. The third sibling had R450H and R519G. RESULTS The R450H mutant exhibited moderately impaired receptor functions and a moderately decreased cell surface expression in agreement with previous results. The V473I mutant exhibited an almost normal TSH binding, a slightly decreased cyclic adenosine monophosphate (cAMP) response, a moderately decreased inositolphosphate (IP) response, and an almost normal cell surface expression. TSH binding and TSH stimulation of cAMP and IPs were markedly decreased in the R519C and R519G mutants. Cell surface expression was decreased in the R519C mutant and negligible in the R519G mutant. All of these mutants showed normal intracellular synthesis of TSH receptors. CONCLUSIONS These novel inactivating mutations contribute to understanding of the structure-function relationship of the TSH receptor. To date, all of the patients with TSH resistance resulting from TSH receptor mutations identified in Japan possessed the R450H mutation at least in one allele. These observations suggest that the R450H mutation is a commonly observed TSH receptor mutation in patients with TSH resistance in Japan.
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Affiliation(s)
- Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Japan
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39
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Ishizuka T, Hisada T, Monden T, Tsunekawa K, Iizuka K, Tsukagoshi H, Dobashi K, Mori M. A case of non-specific interstitial pneumonia effectively treated with a combination of prednisolone and colchicine, in which granulation tissue was extensive. Respirology 2006; 10:541-4. [PMID: 16135182 DOI: 10.1111/j.1440-1843.2005.00733.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A 56-year-old woman was admitted for interstitial pneumonia, and subsequently diagnosed with idiopathic non-specific interstitial pneumonia with a bronchiolitis obliterans organizing pneumonia pattern, on the basis of clinical and surgical lung biopsy findings. Histological findings revealed diffuse thickness of alveolar walls accompanied by lymphocyte infiltration and fibrosis in the lobules. In addition to those findings, granulation tissue was extensive. Although initial symptom and CT improvement occurred following high-dose prednisolone therapy, the CT did not show further improvement and her serum KL-6 level began increasing again as prednisolone was reduced. With the addition of colchicine therapy, clinical and CT findings improved remarkably and a further reduction of the prednisolone dose was achieved. This case suggests that the combination of colchicine and corticosteroids may be an effective therapy for non-specific interstitial pneumonia.
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Affiliation(s)
- Tamotsu Ishizuka
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Maebashi, Japan.
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40
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Tulapurkar AA, Suzuki Y, Fukushima A, Kubota H, Maehara H, Tsunekawa K, Djayaprawira DD, Watanabe N, Yuasa S. Spin-torque diode effect in magnetic tunnel junctions. Nature 2005; 438:339-42. [PMID: 16292307 DOI: 10.1038/nature04207] [Citation(s) in RCA: 645] [Impact Index Per Article: 33.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2005] [Accepted: 09/01/2005] [Indexed: 11/09/2022]
Abstract
There is currently much interest in the development of 'spintronic' devices, in which harnessing the spins of electrons (rather than just their charges) is anticipated to provide new functionalities that go beyond those possible with conventional electronic devices. One widely studied example of an effect that has its roots in the electron's spin degree of freedom is the torque exerted by a spin-polarized electric current on the spin moment of a nanometre-scale magnet. This torque causes the magnetic moment to rotate at potentially useful frequencies. Here we report a very different phenomenon that is also based on the interplay between spin dynamics and spin-dependent transport, and which arises from unusual diode behaviour. We show that the application of a small radio-frequency alternating current to a nanometre-scale magnetic tunnel junction can generate a measurable direct-current (d.c.) voltage across the device when the frequency is resonant with the spin oscillations that arise from the spin-torque effect: at resonance (which can be tuned by an external magnetic field), the structure exhibits different resistance states depending on the direction of the current. This behaviour is markedly different from that of a conventional semiconductor diode, and could form the basis of a nanometre-scale radio-frequency detector in telecommunication circuits.
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Affiliation(s)
- A A Tulapurkar
- Nanoelectronics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8568, Japan
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41
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Nakahara R, Tsunekawa K, Yabe S, Nara M, Seki K, Kasahara T, Ogiwara T, Nishino M, Kobayashi I, Murakami M. Association of antipituitary antibody and type 2 iodothyronine deiodinase antibody in patients with autoimmune thyroid disease. Endocr J 2005; 52:691-9. [PMID: 16410660 DOI: 10.1507/endocrj.52.691] [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] [Indexed: 11/23/2022] Open
Abstract
Antipituitary antibody (APA) has been reported to be detected in patients with autoimmune thyroid disease. Type 2 iodothyronine deiodinase (D2) is expressed in both pituitary gland and thyroid gland. We studied the association of APA and D2 peptide antibody in patients with autoimmune thyroid disease. Rat pituitary gland homogenate and D2 peptide were used as antigens in the present study. APA and D2 peptide antibodies were measured by enzyme-linked immunosorbent assay (ELISA) in sera obtained from 42 patients with Hashimoto's disease, 26 patients with Graves' disease and 70 healthy control subjects. Moreover, D2 activity precipitation assay was performed in some patients with Hashimoto's disease. APA and D2 peptide antibody were elevated in patients with Hashimoto's disease and patients with Graves' disease, compared with control subjects. APA was positive in 32.4% (22/68), D2 peptide antibody was positive in 26.5% (18/68) of patients with autoimmune thyroid disease. APA was positive in 31.0% (13/42) of patients with Hashimoto's disease and 34.6% (9/26) of patients with Graves' disease. D2 peptide antibody was positive in 26.2% (11/42) of patients with Hashimoto's disease and 26.9% (7/26) of patients with Graves' disease. D2 peptide antibody was correlated with APA in patients with autoimmune thyroid disease. Moreover, precipitation of D2 activity was increased in some patients with Hashimoto's disease including a patient who also had idiopathic diabetes insipidus, and was correlated with D2 peptide antibody. These results suggest that D2 antibody may be associated with APA in patients with autoimmune thyroid disease.
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Affiliation(s)
- Rieko Nakahara
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi
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42
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Yamashita S, Nakamura K, Omori Y, Tsunekawa K, Murakami M, Minegishi T. Association of human follitropin (FSH) receptor with splicing variant of human lutropin/choriogonadotropin receptor negatively controls the expression of human FSH receptor. Mol Endocrinol 2005; 19:2099-111. [PMID: 15890674 DOI: 10.1210/me.2005-0049] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
A splice variant of human lutropin (LH)/choriogonadotropin (CG)-receptor [hLHR(exon 9)] that lacks exon 9 was previously cloned in the corpus luteum of a woman with a normal menstrual cycle. Supported by a detergent-soluble binding assay and a receptor biotinylation experiment, the receptor binding assay shows hLHR(exon 9) is neither expressed at the cell surface nor has the capability of binding to hCG. In addition, hLHR(exon 9) was confirmed in the endoplasmic reticulum (ER) by endoglycosidase H treatment. A coimmunoprecipitation experiment clearly showed that hLHR(exon 9) and constitutively inactivate mutant-LHRs, which stay in the ER, form an association with the human follitropin (FSH)-receptor (hFSHR). This suggests that in the presence of mutant-LHR, hFSHR, which is trapped in the ER and associated with hLHR(exon 9), is unable to come up to the plasma membrane. This phenomenon is specific among gonadotropin receptors because human TSH receptor failed to be coimmunoprecipitated. Furthermore, this receptor complex attenuated the hFSHR receptor protein level within the cells, which impaired cAMP production. To elucidate the mechanism underlying the decrease in hFSHR protein by this receptor complex, we performed a Percoll fractionation experiment, which indicated that the receptor complex drove hFSHR to the lysosome instead of the plasma membrane. These results reveal a novel mechanism of FSHR expression regulation.
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Affiliation(s)
- Soichi Yamashita
- Department of Obstetrics and Gynecology, School of Medicine, Gunma University, Gunma 371-8511, Japan
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43
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Morimura T, Tsunekawa K, Kasahara T, Seki K, Ogiwara T, Mori M, Murakami M. Expression of type 2 iodothyronine deiodinase in human osteoblast is stimulated by thyrotropin. Endocrinology 2005; 146:2077-84. [PMID: 15650076 DOI: 10.1210/en.2004-1432] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [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: 11/19/2022]
Abstract
Thyroid hormones play important roles in bone growth, development, and turnover. To exert its biological activity, T(4) needs to be converted to T(3) by iodothyronine deiodinase. In human thyroid gland as well as rat brown adipose tissue, type 2 iodothyronine deiodinase (D2) expression is regulated by a TSH receptor-cAMP-mediated mechanism. TSH receptor knockout mice demonstrated the direct effects of TSH on bone via TSH receptors found on osteoblast and osteoclast precursors. In the present study we investigated the possible expression and function of iodothyronine deiodinase and TSH receptors in human osteoblast-like osteosarcoma (SaOS-2) cells and normal human osteoblast (NHOst) cells. Iodothyronine deiodinase activity was detected in SaOS-2 cells and NHOst cells, and all of the characteristics of deiodinating activity were compatible with those of D2. Northern analysis demonstrated D2 mRNA expression in SaOS-2 cells and NHOst cells. D2 mRNA levels as well as D2 activities were rapidly increased by dibutyryl cAMP or forskolin in SaOS-2 cells and NHOst cells. TSH receptor mRNA was demonstrated in SaOS-2 cells and NHOst cells, and D2 mRNA and D2 activity were stimulated by TSH in both cells. In addition, all T(3) receptor isoforms were detected by RT-PCR in SaOS-2 cells and NHOst cells. The present results indicate the expression of functional TSH receptors and D2 in human osteoblasts and suggest previously unrecognized roles of TSH receptors and local T(3) production by D2 in the pathophysiology of human osteoblasts.
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Affiliation(s)
- Tadashi Morimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
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44
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Arai K, Kawamura O, Naruse I, Tsunekawa K, Hayashi A, Yonezu M, Oya N, Takagi H, Mori M, Kon Y. [A case of chronic pancreatitis with diffuse irregular narrowing of the pancreatic duct complicated by Sjögren's syndrome and interstitial pneumonia]. Nihon Shokakibyo Gakkai Zasshi 2001; 98:847-52. [PMID: 11510089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Affiliation(s)
- K Arai
- 1st Department of Internal Medicine, Gunma University
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45
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Ohgushi N, Hasegawa H, Tsunekawa K. [Phantom anal phenomena following amputation of the rectum]. Nihon Rinsho 1994; Suppl 6:873-876. [PMID: 7837669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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46
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Kurita A, Takashima S, Sakakihara Y, Tsunekawa K, Matsuzaka T. [Efficacy of FEM (5-fluorouracil, epirubicin, mitomycin C) therapy for resected advanced gastric cancer. Ehime Gastric Cancer Study Meeting]. Gan To Kagaku Ryoho 1993; 20:2319-24. [PMID: 8259845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Between April 1990 and March 1991, postoperative adjuvant chemotherapy for resected gastric cancer employing 5-fluorouracil, epirubicin and mitomycin C (FEM) was performed. Forty-two patients subjected to the therapy were considered to have positive serosal invasion and underwent curative operation. FEM therapy consisted of intraoperative intraperitoneal administration of mitomycin C (0.3-0.4 mg/kg) combined with 8 cycles of intravenous bolus injection of epirubicin (20 mg/body) every 2-3 weeks which was started 2 weeks after the operation. Daily oral administration of 5-fluorouracil (150-200 mg/body) was started 2 weeks after the operation and continued for more than 6 months. Thirty-four of the 42 cases were assessable. Major adverse effects were nausea, vomiting, and general fatigue. There were no cardiovascular symptoms. The cumulative two-year survival rate was 74.2%, and follow-up was still under way at this writing.
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Affiliation(s)
- A Kurita
- Dept. of Surgery, Shikoku Cancer Center Hospital
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47
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Hiratani K, Iwahashi K, Tsunekawa K. [The effect of prostacyclin (PGI) on denervated tissues--especially, about denervation supersensitivity]. Nihon Geka Gakkai Zasshi 1992; 93:300-5. [PMID: 1513311] [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: 12/27/2022]
Abstract
It is well known that contractive agents of smooth muscle have denervation supersensitivity. But, the existence of denervation supersensitivity in relaxed ones does not become so clear. We investigated these supersensitivity, especially prostacyclin (PGI2). We made the denervated artery by lumbar sympathetic ganglionectomy in mongrel dogs. Namely, saphenous and dorsal pedal arteries were denervated by this ganglionectomy. And we studied the changes of these arterial tensions by magnus apparatus. Dose-response (D-R) curves of denervated arteries for KCl and noradrenaline (NE) shifted to left against control arteries. Next, we studied effects of PGI2. At first, we measured ED50 of KCl and NE contraction. And, we produced the half contraction on each artery by using ED50 of KCl and NE. Lastly, PGI2 was added on the half contractive arteries to study relaxed changes. D-R curves of denervated arteries for PGI2 shifted to left, too. These denervated arteries acquired the supersensitivity for PGI2. Clinically, if we use relaxants after organ transplantation, these drugs may be very effective for the perfusion of the grafts.
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Affiliation(s)
- K Hiratani
- First Department of Surgery, Ehime University School of Medicine, Japan
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48
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Iwahashi K, Matsuda R, Tsunekawa K. Afferent innervation of the gallbladder in the cat, studied by the horseradish peroxidase method. J Auton Nerv Syst 1991; 32:145-51. [PMID: 2030260 DOI: 10.1016/0165-1838(91)90064-a] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Following injection of horseradish peroxidase (HRP) into the wall of the gallbladder of cats, HRP-positive cells were found bilaterally in dorsal root ganglia T2-L3 (T2-L2, and T3-L2/L3 also observed in a few cats) and nodose ganglia. In about 33% of animals labelled cells were also distributed in cervical dorsal root ganglia C5-C7. Labelled cells were more frequently localized on the right side than the left. There was no apparent change in numbers of labelled cells in the nodose ganglion (NG) on either side following greater and lesser splanchnicotomy or section of the right phrenic nerve or removal of the celiac ganglion. After severing both the greater and lesser splanchnic nerves unilaterally, numbers of labelled afferent cells from the gallbladder in dorsal root ganglia (DRGs) significantly decreased on the ipsilateral side but there was no change in the pattern of distribution contralaterally. After section of the right phrenic nerve, labelled cells were not found in ipsilateral cervical ganglia. That some afferent fibers from the gallbladder travel via the phrenic nerves, particularly on the right side, may be a supplementary mechanism in the generation of referred pain in gallbladder disease. The splanchnic nerves are the main, but not the only pathway for afferent fibers from the gallbladder.
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Affiliation(s)
- K Iwahashi
- 1st Department of Surgery, Ehime University School of Medicine, Japan
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49
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Doi K, Iwahashi K, Tsunekawa K. Participation of the parasympathetic nervous system in the development of activity-stress ulcers. Jpn J Surg 1991; 21:43-9. [PMID: 2041240 DOI: 10.1007/bf02470865] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The present study investigates the effects of truncal vagotomy and drug treatment, comprising atropine methylbromide and chlorisondamine, on the development of activity-stress ulcers in rats. To induce gastric lesions, female rats were housed individually in activity-wheel cages and subjected to a food-restricted schedule of only 1 hr food availability per day. Bilateral truncal vagotomy significantly prevented gastric ulceration, while those rats with vagotomy showed more running activity than sham-operated rats. Daily treatment with either methylatropine (3 and 6 mg/kg, s.c.) or chlorisondamine (2 and 4 mg/kg, i.p.) also significantly decreased the severity of lesions without a significant reduction in running activity. This evidence suggests that the development of activity-stress ulcers is mainly due to the hyperactivity of the peripheral parasympathetic nervous system.
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Affiliation(s)
- K Doi
- First Department of Surgery, Ehime University School of Medicine, Japan
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50
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Mizutani K, Nishimukai H, Yasugi T, Iwahashi K, Tsunekawa K, Shinomiya T. Polymorphisms of serum proteins in Japanese patients with vascular diseases. I. Factor XIIIB, plasminogen and complement types in primary varicose veins. Hum Hered 1991; 41:270-5. [PMID: 1783414 DOI: 10.1159/000154011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The polymorphisms of the B subunit of coagulation factor XIII (F13B), plasminogen (PLG), complement C6, C7, factor B (BF) and factor I (IF) were studied among 21 unrelated Japanese patients with primary varicose veins (PVV) by isoelectric focusing followed by immunoblotting. The allele frequencies for F13B*2 and IF*A in PVV patients were significantly higher (F13B*2, p = 0.0047; IF*A, p = 0.0006) than those in healthy controls (n = 60). Significant associations of F13B 2 allotype [p = 0.0220, relative risk (RR) = 13.9] and IF A allotype (p = 0.0006, RR = 10.0) with PVV were observed; however, no significant association of PLG, C6, C7 or BF allotype with the disease was found.
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Affiliation(s)
- K Mizutani
- First Department of Surgery, School of Medicine, Ehime University, Japan
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