1
|
Yamamoto N, Tsuchiya Y, Fukuda M, Niiro H, Hirota T. A Case Report of Drug Interactions Between Nirmatrelvir/Ritonavir and Tacrolimus in a Patient With Systemic Lupus Erythematosus. Cureus 2024; 16:e52506. [PMID: 38371142 PMCID: PMC10874239 DOI: 10.7759/cureus.52506] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/18/2024] [Indexed: 02/20/2024] Open
Abstract
Nirmatrelvir/ritonavir is a treatment for COVID-19 consisting of nirmatrelvir, which has anti-SARS-CoV-2 activity, and ritonavir, a booster to maintain blood levels. Ritonavir is known to be a potent inhibitor of cytochrome P450 3A (CYP3A), and interactions with CYP3A-metabolized drugs, such as the immunosuppressant tacrolimus, can be problematic. Ritonavir's inhibition of CYP3A is irreversible due to covalent binding, and its inhibitory effects are expected to persist until replaced by new CYP3A. Here, we report a case where the combination of nirmatrelvir/ritonavir and tacrolimus resulted in toxic tacrolimus blood levels. A patient on tacrolimus for systemic lupus erythematosus (SLE) developed COVID-19 and was prescribed nirmatrelvir/ritonavir. After starting the combination of nirmatrelvir/ritonavir and tacrolimus, the patient's tacrolimus blood levels became abnormally high, leading to the discontinuation of these drugs due to symptoms of tacrolimus toxicity. Even after ritonavir blood levels had fallen below the detection limit, the decline in tacrolimus blood levels was delayed. The CYP3A inhibition of ritonavir persists even when its blood concentration decreases, emphasizing the need for careful consideration of concomitant medications before starting nirmatrelvir/ritonavir therapy. Adjustments or discontinuation may be necessary.
Collapse
Affiliation(s)
- Nanae Yamamoto
- Department of Pharmacology and Therapeutics, Kyushu University Hospital, Fukuoka, JPN
| | - Yuichi Tsuchiya
- Department of Pharmacology and Therapeutics, Kyushu University Hospital, Fukuoka, JPN
| | - Mio Fukuda
- Department of Pharmacology and Therapeutics, Kyushu University Hospital, Fukuoka, JPN
| | - Hiroaki Niiro
- Faculty of Medical Sciences, Department of Medical Education, Kyushu University, Fukuoka, JPN
| | - Takeshi Hirota
- Department of Pharmacology and Therapeutics, Kyushu University Hospital, Fukuoka, JPN
| |
Collapse
|
2
|
Tsuchiya Y, Seki T, Nakano H, Tanaka M, Takahashi R. [Aging-associated Cyst Formation and Fibrosis]. YAKUGAKU ZASSHI 2024; 144:397-402. [PMID: 38556314 DOI: 10.1248/yakushi.23-00165-2] [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] [Indexed: 04/02/2024]
Abstract
Cysts are abnormal fluid-filled sacs found in various human organs, including the liver. Liver cysts can be associated with known causes such as parasite infections and gene mutations, or simply aging. Among these causes, simple liver cysts are often found in elderly people. While they are generally benign, they may occasionally grow but rarely shrink with age, indicating their clear association with aging. However, the mechanism behind the formation of simple liver cysts has not been thoroughly investigated. Recently, we have generated transgenic mice that specifically overexpress fibroblast growth factor (FGF)18 in hepatocytes. These mice exhibit severe liver fibrosis without inflammation and spontaneously develop liver cysts that grow with age. Our findings suggest that simple liver cysts can be induced by fibrosis accompanied by sterile inflammation or injury, whereas fibrosis accompanied by severe inflammation or injury may lead to cirrhosis. We also discuss the detrimental effects of disease- and aging-associated fibrosis in various organs, such as the heart, lungs, and kidneys. Additionally, we provide a brief summary of the two currently approved anti-fibrotic drugs for idiopathic pulmonary fibrosis, nintedanib and pirfenidone, as well as their possibility of future expansion of application toward other fibrotic diseases.
Collapse
Affiliation(s)
- Yuichi Tsuchiya
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Toho University
| | - Takao Seki
- Department of Biochemistry, Faculty of Medicine, Toho University
| | - Hiroyasu Nakano
- Department of Biochemistry, Faculty of Medicine, Toho University
| | - Minoru Tanaka
- Department of Regenerative Medicine, Research Institute, National Center for Global Health and Medicine
- Laboratory of Stem Cell Regulation, Institute for Quantitative Biosciences, The University of Tokyo
| | - Ryoya Takahashi
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Toho University
| |
Collapse
|
3
|
Tsuchiya Y, Seki T, Kobayashi K, Komazawa-Sakon S, Shichino S, Nishina T, Fukuhara K, Ikejima K, Nagai H, Igarashi Y, Ueha S, Oikawa A, Tsurusaki S, Yamazaki S, Nishiyama C, Mikami T, Yagita H, Okumura K, Kido T, Miyajima A, Matsushima K, Imasaka M, Araki K, Imamura T, Ohmuraya M, Tanaka M, Nakano H. Fibroblast growth factor 18 stimulates the proliferation of hepatic stellate cells, thereby inducing liver fibrosis. Nat Commun 2023; 14:6304. [PMID: 37813881 PMCID: PMC10562492 DOI: 10.1038/s41467-023-42058-z] [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: 06/29/2022] [Accepted: 09/28/2023] [Indexed: 10/11/2023] Open
Abstract
Liver fibrosis results from chronic liver injury triggered by factors such as viral infection, excess alcohol intake, and lipid accumulation. However, the mechanisms underlying liver fibrosis are not fully understood. Here, we demonstrate that the expression of fibroblast growth factor 18 (Fgf18) is elevated in mouse livers following the induction of chronic liver fibrosis models. Deletion of Fgf18 in hepatocytes attenuates liver fibrosis; conversely, overexpression of Fgf18 promotes liver fibrosis. Single-cell RNA sequencing reveals that overexpression of Fgf18 in hepatocytes results in an increase in the number of Lrat+ hepatic stellate cells (HSCs), thereby inducing fibrosis. Mechanistically, FGF18 stimulates the proliferation of HSCs by inducing the expression of Ccnd1. Moreover, the expression of FGF18 is correlated with the expression of profibrotic genes, such as COL1A1 and ACTA2, in human liver biopsy samples. Thus, FGF18 promotes liver fibrosis and could serve as a therapeutic target to treat liver fibrosis.
Collapse
Affiliation(s)
- Yuichi Tsuchiya
- Department of Biochemistry, Faculty of Medicine, Toho University, 5-21-16 Omori-Nishi, Ota-ku, Tokyo, 143-8540, Japan
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi-shi, Chiba, 274-8510, Japan
| | - Takao Seki
- Department of Biochemistry, Faculty of Medicine, Toho University, 5-21-16 Omori-Nishi, Ota-ku, Tokyo, 143-8540, Japan
| | - Kenta Kobayashi
- Department of Biochemistry, Faculty of Medicine, Toho University, 5-21-16 Omori-Nishi, Ota-ku, Tokyo, 143-8540, Japan
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo, 125-8585, Japan
| | - Sachiko Komazawa-Sakon
- Department of Biochemistry, Faculty of Medicine, Toho University, 5-21-16 Omori-Nishi, Ota-ku, Tokyo, 143-8540, Japan
| | - Shigeyuki Shichino
- Division of Molecular Regulation of Inflammatory and Immune Diseases, Research Institute for Biomedical Sciences, Tokyo University of Science, 2669 Yamazaki, Noda-shi, Chiba, 278-0022, Japan
| | - Takashi Nishina
- Department of Biochemistry, Faculty of Medicine, Toho University, 5-21-16 Omori-Nishi, Ota-ku, Tokyo, 143-8540, Japan
| | - Kyoko Fukuhara
- Department of Gastroenterology, Faculty of Medicine and Graduate School of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Kenichi Ikejima
- Department of Gastroenterology, Faculty of Medicine and Graduate School of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Hidenari Nagai
- Department of Gastroenterology, Toho University Omori Medical Center, 6-11-1 Omori-Nishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Yoshinori Igarashi
- Department of Gastroenterology, Toho University Omori Medical Center, 6-11-1 Omori-Nishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Satoshi Ueha
- Division of Molecular Regulation of Inflammatory and Immune Diseases, Research Institute for Biomedical Sciences, Tokyo University of Science, 2669 Yamazaki, Noda-shi, Chiba, 278-0022, Japan
| | - Akira Oikawa
- Laboratory of Quality Analysis and Assessment, Graduate School of Agriculture, Kyoto University, Gokasyo, Uji-shi, Kyoto, 611-0011, Japan
| | - Shinya Tsurusaki
- Department of Regenerative Medicine, Research Institute, National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku-ku, Tokyo, 162-8655, Tokyo, Japan
- Laboratory of Stem Cell Regulation, Institute for Quantitative Biosciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-0032, Tokyo, Japan
| | - Soh Yamazaki
- Department of Biochemistry, Faculty of Medicine, Toho University, 5-21-16 Omori-Nishi, Ota-ku, Tokyo, 143-8540, Japan
| | - Chiharu Nishiyama
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo, 125-8585, Japan
| | - Tetuo Mikami
- Department of Pathology, Faculty of Medicine, Toho University, 5-21-16 Omori-Nishi, Ota-ku, Tokyo, 143-8540, Japan
| | - Hideo Yagita
- Department of Immunology, Faculty of Medicine and Graduate School of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Ko Okumura
- Atopy Research Center, Faculty of Medicine and Graduate School of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Taketomo Kido
- Laboratory of Cell Growth and Differentiation, Institute for Quantitative Biosciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan
| | - Atsushi Miyajima
- Laboratory of Cell Growth and Differentiation, Institute for Quantitative Biosciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan
| | - Kouji Matsushima
- Division of Molecular Regulation of Inflammatory and Immune Diseases, Research Institute for Biomedical Sciences, Tokyo University of Science, 2669 Yamazaki, Noda-shi, Chiba, 278-0022, Japan
| | - Mai Imasaka
- Department of Genetics, Hyogo Medical University, 1-1 Mukogawa-cho, Nishinomiya-shi, Hyogo, 663-8501, Japan
| | - Kimi Araki
- Center for Animal Resources and Development, Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto, 860-0811, Japan
- Center for Metabolic Regulation of Healthy Aging, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Toru Imamura
- Hoshi University School of Pharmacy and Pharmaceutical Sciences, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba-shi, Ibaraki, 305-8560, Japan
| | - Masaki Ohmuraya
- Department of Genetics, Hyogo Medical University, 1-1 Mukogawa-cho, Nishinomiya-shi, Hyogo, 663-8501, Japan
| | - Minoru Tanaka
- Department of Regenerative Medicine, Research Institute, National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku-ku, Tokyo, 162-8655, Tokyo, Japan
- Laboratory of Stem Cell Regulation, Institute for Quantitative Biosciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-0032, Tokyo, Japan
| | - Hiroyasu Nakano
- Department of Biochemistry, Faculty of Medicine, Toho University, 5-21-16 Omori-Nishi, Ota-ku, Tokyo, 143-8540, Japan.
| |
Collapse
|
4
|
Fujita Y, Murai M, Muraki S, Suetsugu K, Tsuchiya Y, Hirota T, Matsunaga N, Ieiri I. Population Pharmacokinetic Analysis of Drug-Drug Interactions Between Perampanel and Carbamazepine Using Enzyme Induction Model in Epileptic Patients. Ther Drug Monit 2023; 45:653-659. [PMID: 36645709 DOI: 10.1097/ftd.0000000000001055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 09/02/2022] [Indexed: 01/17/2023]
Abstract
BACKGROUND Perampanel (PER) is an oral antiepileptic drug and its concomitant use with carbamazepine (CBZ) leads to decreased PER concentrations. However, the magnitude of its influence may vary, depending on the dynamics of the enzyme induction properties of CBZ. This study aimed to develop a population pharmacokinetic (PPK) model considering the dynamics of enzyme induction and evaluate the effect of CBZ on PER pharmacokinetics. METHODS We retrospectively collected data on patient background, laboratory tests, and prescribed drugs from electronic medical records. We developed 2 PPK models incorporating the effect of CBZ-mediated enzyme induction to describe time-concentration profiles of PER using the following different approaches: (1) treating the concomitant use of CBZ as a categorical covariate (empirical PPK model) and (2) incorporating the time-course of changes in the amount of enzyme by CBZ-mediated induction (semimechanistic PPK model). The bias and precision of the predictions were investigated by calculating the mean error, mean absolute error, and root mean squared error. RESULTS A total of 133 PER concentrations from 64 patients were available for PPK modelling. PPK analyses showed that the co-administration of CBZ increased the clearance of PER. Goodness-of-fit plots indicated a favorable description of the observed data and low bias. The mean error, mean absolute error, and root mean square error values based on the semimechanistic model were smaller than those obtained using the empirical PPK model for predicting PER concentrations in patients with CBZ. CONCLUSIONS We developed 2 PPK models to describe PER pharmacokinetics based on different approaches, using electronic medical record data. Our PPK models support the use of PER in clinical practice.
Collapse
Affiliation(s)
- Yuito Fujita
- Department of Clinical Pharmacokinetics, Graduate School of Pharmaceutical Science, Kyushu University, Fukuoka, Japan; and
| | - Mariko Murai
- Department of Clinical Pharmacokinetics, Graduate School of Pharmaceutical Science, Kyushu University, Fukuoka, Japan; and
| | - Shota Muraki
- Department of Clinical Pharmacokinetics, Graduate School of Pharmaceutical Science, Kyushu University, Fukuoka, Japan; and
| | | | - Yuichi Tsuchiya
- Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan
| | - Takeshi Hirota
- Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan
| | - Naoya Matsunaga
- Department of Clinical Pharmacokinetics, Graduate School of Pharmaceutical Science, Kyushu University, Fukuoka, Japan; and
| | - Ichiro Ieiri
- Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan
| |
Collapse
|
5
|
Tsuchiya Y, Komazawa-Sakon S, Tanaka M, Kanokogi T, Moriwaki K, Akiba H, Yagita H, Okumura K, Entzminger KC, Okumura CJ, Maruyama T, Nakano H. A high-sensitivity ELISA for detection of human FGF18 in culture supernatants from tumor cell lines. Biochem Biophys Res Commun 2023; 675:71-77. [PMID: 37453260 DOI: 10.1016/j.bbrc.2023.06.070] [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: 06/15/2023] [Accepted: 06/22/2023] [Indexed: 07/18/2023]
Abstract
Fibroblast growth factor 18 (FGF18) is elevated in several human cancers, such as gastrointestinal and ovarian cancers, and stimulates the proliferation of tumor cells. This suggests that FGF18 may be a promising candidate biomarker in cancer patients. However, the lack of a high-sensitivity enzyme-linked immunosorbent assay (ELISA) does not permit testing of this possibility. In this study, we generated monoclonal antibodies against human FGF18 and developed a high-sensitivity ELISA to measure human FGF18 at concentrations as low as 10 pg/mL. Of the eight tumor cell lines investigated, we detected human FGF18 in culture supernatants from four tumor cell lines, including HeLa, OVCAR-3, BxPC-3, and SW620 cells, albeit the production levels were relatively low in the latter two cell lines. Moreover, the in-house ELISA could detect murine FGF18 in sera from mice overexpressing murine Fgf18 in hepatocytes, although the sensitivity in detecting murine FGF18 was relatively low. This FGF18 ELISA could be a valuable tool to validate FGF18 as a potential biomarker for cancer patients and to test the contribution of FGF18 for various disease models invivo and in vitro.
Collapse
Affiliation(s)
- Yuichi Tsuchiya
- Department of Biochemistry, Faculty of Medicine, Toho University, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan; Department of Biochemistry, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi-shi, Chiba 274-8510, Japan
| | - Sachiko Komazawa-Sakon
- Department of Biochemistry, Faculty of Medicine, Toho University, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan
| | - Masato Tanaka
- Laboratory of Immune regulation, School of Life Science, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji-shi, Tokyo, 192-0392, Japan
| | - Takumi Kanokogi
- Department of Biochemistry, Faculty of Medicine, Toho University, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan; Department of Respiratory Medicine, Omori Medical Center, Toho University School Medicine, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan
| | - Kenta Moriwaki
- Department of Biochemistry, Faculty of Medicine, Toho University, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan
| | - Hisaya Akiba
- Department of Immunology, Faculty of Medicine and Graduate School of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
| | - Hideo Yagita
- Department of Immunology, Faculty of Medicine and Graduate School of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
| | - Ko Okumura
- Atopy Research Center, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Kevin C Entzminger
- Abwiz Bio, Inc., 9823 Pacific Heights BLVD, Suite J, San Diego, CA, 92121, USA
| | - C J Okumura
- Abwiz Bio, Inc., 9823 Pacific Heights BLVD, Suite J, San Diego, CA, 92121, USA
| | - Toshiaki Maruyama
- Abwiz Bio, Inc., 9823 Pacific Heights BLVD, Suite J, San Diego, CA, 92121, USA
| | - Hiroyasu Nakano
- Department of Biochemistry, Faculty of Medicine, Toho University, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan.
| |
Collapse
|
6
|
Hagiwara K, Kitamura H, Tsuchiya Y, Mizoshiri A, Iwabuchi T. 563 CsA-induced hypertrichosis might be caused in part by inhibition of TGF-β2 expression in dermal papilla cells. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
7
|
Zhang M, Tajima S, Suetsugu K, Hirota T, Tsuchiya Y, Yamauchi T, Yoshimoto G, Miyamoto T, Egashira N, Akashi K, Ieiri I. Development and Validation of an LC-MS/MS Method to Quantify Gilteritinib and Its Clinical Application in Patients With FLT3 Mutation-Positive Acute Myelogenous Leukemia. Ther Drug Monit 2022; 44:592-596. [PMID: 35149666 DOI: 10.1097/ftd.0000000000000971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 11/21/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND Gilteritinib, a novel oral tyrosine kinase inhibitor, is used to treat acute myeloid leukemia (AML) with FMS-like tyrosine kinase-3 (FLT3) mutations. Therapeutic drug monitoring (TDM) of gilteritinib is important for improving clinical outcomes and ensuring safety. Therefore, this study aimed to develop a simplified method for quantifying gilteritinib in human plasma using liquid chromatography-tandem mass spectrometry. METHODS Liquid chromatography was performed by using an Acquity BEH C18 column (50 mm × 2.1 mm, 1.7 μm) and a gradient elution with 0.1% formic acid in water (A) and acetonitrile (B). Detection was performed by using a Shimadzu tandem mass spectrometer through multiple reaction monitoring in the positive-ion mode. RESULTS The developed method enabled quantification of gilteritinib in 4 minutes and was validated by evaluating selectivity, calibration curve (10-1000 ng/mL, r 2 > 0.99), a lower limit of quantification (LLOQ), accuracy (overall bias -4.2% to 1.9%), precision (intraday CV ≤ 7.9%; interday CV ≤ 13.6%), carryover, recovery, matrix effect, dilution integrity, and stability according to the US Food and Drug Administration (FDA) guidelines. This method was successfully applied to the TDM of gilteritinib trough concentrations in 3 patients with AML. CONCLUSIONS The developed method fulfilled the FDA guideline criteria and can easily be implemented to facilitate TDM in patients receiving gilteritinib in a clinical setting.
Collapse
Affiliation(s)
- Mengyu Zhang
- Department of Clinical Pharmacology and Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Soichiro Tajima
- Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan
| | | | - Takeshi Hirota
- Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan
| | - Yuichi Tsuchiya
- Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan
| | - Takuji Yamauchi
- Department of Medicine and Biosystemic Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Goichi Yoshimoto
- Department of Medicine and Biosystemic Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Hematology, Saga-Ken Medical Centre Koseikan, Saga, Japan ; and
| | - Toshihiro Miyamoto
- Department of Medicine and Biosystemic Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Hematology, Kanazawa University Hospital, Kanazawa, Ishikawa, Japan
| | - Nobuaki Egashira
- Department of Clinical Pharmacology and Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
- Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan
| | - Koichi Akashi
- Department of Medicine and Biosystemic Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Ichiro Ieiri
- Department of Clinical Pharmacology and Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
- Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan
| |
Collapse
|
8
|
Zhang W, Matsukane R, Egashira N, Tsuchiya Y, Fu R, Yamamoto S, Hirota T, Ieiri I. Neuroprotective effects of ibudilast against tacrolimus induced neurotoxicity. Toxicol Appl Pharmacol 2022; 449:116112. [DOI: 10.1016/j.taap.2022.116112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 05/26/2022] [Accepted: 06/03/2022] [Indexed: 10/18/2022]
|
9
|
Tsuchiya Y, Tsujiuchi T, Iwagami T, Ogiwara A, Tanaka Y. Long time psychological distress affected by the Great East Japan Earthquake after four years. Eur J Public Health 2021. [DOI: 10.1093/eurpub/ckab165.611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
On March 11th, 2011, the Great East Japan Earthquake hit the Tohoku area, and more than 15,000 people lost their lives by the tsunami and earthquake. People who survived natural disasters, terrors, or serious diseases reported long-time psychological distress such as PTSD (Post Traumatic Stress Syndrome) or depression. This study aims to elaborate on factors associated with PTSD post the Great East Japan Earthquake after four years.
Methods
Quantitative and qualitative analysis from a questionnaire survey conducted after four years of the earthquake in 2015. The questionnaires included participants' attributes, IES-R scale to evaluate PTSD, loss of their families by tsunami and earthquake, their own tsunami experience, many relocations after the earthquake, lost job after the earthquake. The open-ended question asked them to write about their challenges in their lives and others.
Results
We received 3465 responses. Among those who responded, the IES-R scale was significantly larger in women (n = 1397) (aOR=1.55, p = 0.001) than men (n = 1966). Higher in those with more their own tsunami experience (aOR=1.35, p = 0.014), in those with lost loved ones (aOR=2.1, p < 0.01), and in those with more economic difficulties (aOR=1.6, p < 0.001). In addition, those with less social connectedness (aOR=1.34, p = 0.017) and forced to live separately with family members after the earthquake(aOR=1.36, p = 0.014) were significantly higher in the scale. From a quality analysis, we observed much psychological distress from participants.
Discussion and Conclusions
In this study, more than half in the PTSD risk group reported that they had never cared for mental pain after the earth quake. We overlook PTSD frequently. However, long-range monitoring and care are necessary for those affected by a significant disaster.
Key messages
PTSD after disasters have been overlooked frequently. A long-range monitoring and care are necessary after a significant disaster.
Collapse
Affiliation(s)
- Y Tsuchiya
- Advanced Research Center for Human Sciences, Waseda University, Tokorozawa-shi, Japan
| | - T Tsujiuchi
- Faculty of Human Science, Waseda University, Tokorozawa-shi, Japan
| | - T Iwagami
- Faculty of Human Science, Waseda University, Tokorozawa-shi, Japan
| | - A Ogiwara
- Faculty of Human Science, Waseda University, Tokorozawa-shi, Japan
| | - Y Tanaka
- Philosophy, Politics, and Economics, Waseda University, Tokyo, Japan
| |
Collapse
|
10
|
Tanaka Y, Tsuchiya Y. Mother's hesitancy of vaccinating their children in Japan – Text analysis survey. Eur J Public Health 2021. [PMCID: PMC8574303 DOI: 10.1093/eurpub/ckab165.566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Background the world is facing a novel coronavirus pandemic, and the role of vaccination and vaccination acceptance is playing an important role under current vaccination deployment. Japan's vaccination system has progressed these days greatly; however, the non-mandatory vaccination rate for children such as mumps, influenza is still low due to mothers' hesitancy. Given this circumstance, we conducted a qualitative analysis using text analysis methods for Japanese mothers with children about their hesitancy to vaccinate their children in Japan. Methods We used the data of a questionnaire survey first conducted in 2012, where two hundred and twenty-six mothers participated with an average age of 44.7 years (SD ± 5.02). The questionnaire included open-ended questions, where mothers wrote their opinion freely about vaccination about their children. We conducted text analysis focusing on the keywords of ‘hesitancy' (IBM SPSS Text Analytics for Surveys 4.0). Results The keywords that extracted frequently included; vaccination (n = 160), hesitancy (n = 66), difficulty in access to vaccination (n = 57), knowledge/information scarcity (n = 31), fear for side effect (n = 30), complexity of vaccination schedule (n = 23) and government subsidies (n = 20). The most related keyword with hesitancy was; side effect (n = 20), expensive cost (n = 12), and non-mandatory (n = 10). A keyword of having natural immunity was also closely connected (n = 8). Discussion and Conclusions To ameliorate hesitancy among mothers against vaccination of their children, local government notification and subsidy as mandatory vaccination, providing the correct information about diseases and side effects of vaccinations would work as plus factors. Key messages For pandemic preparedness, it is necessary to research vaccine acceptance among children. This research is to explore vaccine hesitancy among mothers and factors related to their unwillingness.
Collapse
Affiliation(s)
- Y Tanaka
- Philosophy, Politics, and Economics, Waseda University, Tokyo, Japan
| | - Y Tsuchiya
- Advanced Research Center for Human Sciences, Waseda University, Saitama, Japan
| |
Collapse
|
11
|
Belabbas T, Yamada T, Tsuchiya Y, Suetsugu K, Egashira N, Ieiri I. Development and Full Validation of a Bioanalytical Method for Quantifying Letermovir in Human Plasma Using Ultra-Performance Liquid Chromatography Coupled with Mass Spectrometry. Chem Pharm Bull (Tokyo) 2021; 69:646-651. [PMID: 34193713 DOI: 10.1248/cpb.c21-00142] [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] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
With the aim of studying the pharmacokinetics of letermovir, which is a newly developed antiviral agent for human cytomegalovirus, a rapid and simple ultra-performance liquid chromatography coupled with mass spectrometry (UPLC/MS) method was developed and validated for the quantification of letermovir in human plasma. Separation was performed in reverse phase mode using an ACQUITY UPLC BEH C18 column (130 Å, 1.7 µm, 2.1 × 50 mm) at a flow rate of 0.3 mL/min, 10 mM ammonium acetate-0.1% formic acid solution as mobile phase A, and acetonitrile as mobile phase B with a gradient elution. The method was validated over a linear range of 10-1000 ng/mL with a coefficient of determination (R2) >0.99 using weighted linear regression analysis. The intra- and inter-assay accuracy (nominal%) and precision (relative standard deviation%) were within ±15 and ≤15%, respectively. The specificity, recovery, matrix effect, stability, and dilution integrity of this method were also within acceptable limits. This method could be useful in studying the pharmacokinetics and pharmacodynamics, as well as performing the therapeutic drug monitoring of letermovir.
Collapse
Affiliation(s)
- Tassadit Belabbas
- Department of Clinical Pharmacology and Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Kyushu University
| | | | | | | | - Nobuaki Egashira
- Department of Clinical Pharmacology and Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Kyushu University.,Department of Pharmacy, Kyushu University Hospital
| | - Ichiro Ieiri
- Department of Clinical Pharmacology and Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Kyushu University.,Department of Pharmacy, Kyushu University Hospital
| |
Collapse
|
12
|
Suetsugu K, Yamamoto N, Shigematsu T, Kobayashi D, Tsuchiya Y, Nakayama Y, Tsuji T, Watanabe H, Kanaya A, Masuda S, Egashira N. [Significant Changes Associated with the Transition from Outsourcing to In-hospital Therapeutic Drug Monitoring of Novel Antiepileptics]. YAKUGAKU ZASSHI 2020; 140:1035-1040. [PMID: 32741861 DOI: 10.1248/yakushi.20-00001] [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] [Indexed: 11/22/2022]
Abstract
For many of the novel antiepileptics, immunoassays, used for routine therapeutic drug monitoring (TDM), cannot be used. We could monitor eight novel antiepileptics using an LC/MS method since July 2017. The purpose of this study was to evaluate the significant changes associated with the transition from outsourcing to in-hospital monitoring of novel antiepileptics. The number of measurements of novel antiepileptics was significantly increased during the first (p<0.01) and second (p<0.001) years of in-hospital monitoring as compared to that one year prior to in-hospital monitoring which was outsourced. The proportion of measurements of novel antiepileptics to all antiepileptics was 19.7%, 31.1%, and 38.4% during outsourcing, and first, and second years of in-hospital monitoring, respectively. The measurement cost was significantly reduced during the first (p<0.001) and second (p<0.001) years of in-hospital monitoring as compared to that during outsourcing. In addition, the revenue from TDM of antiepileptic drugs was significantly increased during the first (p<0.05) and second (p<0.01) years of in-hospital monitoring as compared with that during outsourcing. In conclusion, the switch from outsourcing to in-hospital monitoring led to an increase in the number of orders, a reduction in the measurement-related expenses of novel antiepileptics, and an increase in the revenue from TDM of antiepileptic drugs, which could promote the proper use of novel antiepileptics through TDM.
Collapse
Affiliation(s)
| | | | | | - Daisuke Kobayashi
- Department of Clinical Pharmacy and Pharmaceutical Care, Graduate School of Pharmaceutical Sciences, Kyushu University
| | | | | | | | | | - Akiko Kanaya
- Department of Pharmacy, Kyushu University Hospital
| | - Satohiro Masuda
- Department of Pharmacy, Kyushu University Hospital.,Department of Pharmacy, International University of Health and Welfare Narita Hospital
| | | |
Collapse
|
13
|
Inui M, Kajihara Y, Tsuchiya Y, Hosokawa S, Matsuda K, Uchiyama H, Tsutsui S, Baron AQR. Peculiar temperature dependence of dynamical sound speed in liquid Se 50Te 50 by inelastic x-ray scattering. J Phys Condens Matter 2020; 32:214003. [PMID: 31958784 DOI: 10.1088/1361-648x/ab6d8e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Inelastic x-ray scattering (IXS) measurements were carried out on liquid Se50Te50 at temperatures up to 1323 K to investigate how the atomic dynamics changes with temperature through the semiconductor-metal transition. The acoustic mode was clearly observed in the dynamic structure factor and its energy was determined using a damped harmonic oscillator model. The dynamical sound speed obtained by IXS for [Formula: see text] nm-1 was found to behave similarly to the temperature dependence of ultrasonic sound velocity with a minimum near the semiconductor metal transition. The results can be explained by taking liquid Se50Te50 to be an inhomogeneous liquid consisting of metallic and semiconducting domains whose size is approximately 3 nm. The relaxation time obtained from frequency dependence of the dynamical sound speed was on a picosecond time scale.
Collapse
Affiliation(s)
- M Inui
- Graduate School of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 7319-8521, Japan
| | | | | | | | | | | | | | | |
Collapse
|
14
|
Saito H, Nakakita Y, Segawa S, Tsuchiya Y. Oral administration of heat-killed Lactobacillus brevis SBC8803 elevates the ratio of acyl/des-acyl ghrelin in blood and increases short-term food intake. Benef Microbes 2019; 10:671-677. [DOI: 10.3920/bm2018.0091] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
It is known that gastrointestinal microbiota, probiotics and heat-killed microbes can regulate intestinal immunity; however, their effect on the secretion of gastrointestinal hormones is unclear. The secretion of gastrointestinal hormones can be mediated by the elevation of intracellular Ca2+ concentration, suggesting that these hormones may act through common mechanisms. We have previously shown that heat-killed Lactobacillus brevis SBC8803 (hk-SBC8803) induced the secretion of serotonin and elevated intracellular Ca2+ concentration in serotonin-producing RIN-14B cells, suggesting that hk-SBC8803 could potentially cause the same effect on other gastrointestinal hormones, including hunger hormone ghrelin. Here, we tested this hypothesis by treating cultured cells and experimental animals with hk-SBC8803 and assessing ghrelin secretion, expression of ghrelin-related genes, and food intake. The results indicated that hk-SBC8803 treatment for 30 min significantly upregulated the secretion of acyl ghrelin (active form) (P=0.046) and mRNA expression of the Syt3 (synaptotagmin 3) gene related to ghrelin exocytosis (P<0.05) in primary mouse stomach cells. In addition, oral administration of 500 mg/kg hk-SBC8803 to rats tended to upregulate acyl ghrelin concentration (P=0.10) and significantly increased the ratio of acyl to des-acyl (inactive) ghrelin (P=0.027) in blood, which corresponded to a tendency of stimulating food intake (P=0.087) at 30 min post-treatment. However, when in order to minimise individual differences we normalised the data on food intake to those on one-day food intake prior to food deprivation, the resultant food intake ratio showed a significant increase (by 5% compared to control; P=0.032) at 30 min after hk-SBC8803 treatment, indicating that hk-SBC8803 administration stimulated rats to take more food during the first meal after fasting. These results suggest that hk-SBC8803 induces short-term ghrelin secretion and transiently increases appetite, which is an important effect for individuals with low energy intake.
Collapse
Affiliation(s)
- H. Saito
- Frontier Laboratories for Value Creation, Sapporo Holdings Ltd., 10 Okatome, Yaizu, Shizuoka 425-0013, Japan
| | - Y. Nakakita
- Frontier Laboratories for Value Creation, Sapporo Holdings Ltd., 10 Okatome, Yaizu, Shizuoka 425-0013, Japan
| | - S. Segawa
- Frontier Laboratories for Value Creation, Sapporo Holdings Ltd., 10 Okatome, Yaizu, Shizuoka 425-0013, Japan
| | - Y. Tsuchiya
- Frontier Laboratories for Value Creation, Sapporo Holdings Ltd., 10 Okatome, Yaizu, Shizuoka 425-0013, Japan
| |
Collapse
|
15
|
Tsuchiya Y, Saito M, Kadokura H, Miyazaki JI, Tashiro F, Imagawa Y, Iwawaki T, Kohno K. Correction: IRE1-XBP1 pathway regulates oxidative proinsulin folding in pancreatic β cells. J Cell Biol 2019; 218:1764. [PMID: 30926725 PMCID: PMC6504905 DOI: 10.1083/jcb.20170714303252019c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
16
|
Ebata T, Hirano S, Konishi M, Uesaka K, Tsuchiya Y, Ohtsuka M, Kaneoka Y, Yamamoto M, Ambo Y, Shimizu Y, Ozawa F, Fukutomi A, Ando M, Nimura Y, Nagino M. Randomized clinical trial of adjuvant gemcitabine chemotherapy versus observation in resected bile duct cancer. Br J Surg 2018; 105:192-202. [PMID: 29405274 DOI: 10.1002/bjs.10776] [Citation(s) in RCA: 227] [Impact Index Per Article: 37.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 10/30/2017] [Accepted: 11/01/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND Although some retrospective studies have suggested the value of adjuvant therapy, no recommended standard exists in bile duct cancer. The aim of this study was to test the hypothesis that adjuvant gemcitabine chemotherapy would improve survival probability in resected bile duct cancer. METHODS This was a randomized phase III trial. Patients with resected bile duct cancer were assigned randomly to gemcitabine and observation groups, which were balanced with respect to lymph node status, residual tumour status and tumour location. Gemcitabine was given intravenously at a dose of 1000 mg/m2 , administered on days 1, 8 and 15 every 4 weeks for six cycles. The primary endpoint was overall survival, and secondary endpoints were relapse-free survival, subgroup analysis and toxicity. RESULTS Some 225 patients were included (117 gemcitabine, 108 observation). Baseline characteristics were well balanced between the gemcitabine and observation groups. There were no significant differences in overall survival (median 62·3 versus 63·8 months respectively; hazard ratio 1·01, 95 per cent c.i. 0·70 to 1·45; P = 0·964) and relapse-free survival (median 36·0 versus 39·9 months; hazard ratio 0·93, 0·66 to 1·32; P = 0·693). There were no survival differences between the two groups in subsets stratified by lymph node status and margin status. Although haematological toxicity occurred frequently in the gemcitabine group, most toxicities were transient, and grade 3/4 non-haematological toxicity was rare. CONCLUSION The survival probability in patients with resected bile duct cancer was not significantly different between the gemcitabine adjuvant chemotherapy group and the observation group. Registration number: UMIN 000000820 (http://www.umin.ac.jp/).
Collapse
Affiliation(s)
- T Ebata
- Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - S Hirano
- Department of Gastroenterological Surgery II, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - M Konishi
- Department of Hepatobiliary-Pancreatic Surgery, National Cancer Centre Hospital East, Kashiwa, Japan
| | - K Uesaka
- Division of Hepato-Biliary-Pancreatic Surgery, Shizuoka Cancer Centre Hospital, Shizuoka, Japan
| | - Y Tsuchiya
- Department of Surgery, Niigata Cancer Centre Hospital, Niigata, Japan
| | - M Ohtsuka
- Department of General Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Y Kaneoka
- Department of Surgery, Ogaki Municipal Hospital, Ogaki, Japan
| | - M Yamamoto
- Department of Surgery, Institute of Gastroenterology, Tokyo Women's Medical University, Tokyo, Japan
| | - Y Ambo
- Department of Surgery, Teine-Keijinkai Hospital, Sapporo, Japan
| | - Y Shimizu
- Department of Gastroenterological Surgery, Aichi Cancer Centre Hospital, Nagoya, Japan
| | - F Ozawa
- Department of Hepato-Biliary-Pancreatic Surgery, Saitama Medical Centre, Saitama Medical University, Saitama, Japan
| | - A Fukutomi
- Division of Gastrointestinal Oncology, Shizuoka Cancer Centre Hospital, Shizuoka, Japan
| | - M Ando
- Centre for Advanced Medicine and Clinical Research, Nagoya University Hospital, Nagoya, Japan
| | - Y Nimura
- Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - M Nagino
- Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | | |
Collapse
|
17
|
Tsuchiya Y, Tsujiuchi T, Iwagaki T, Mochida R, Ishikawa N, Katsuragawa T, Masuda K, Taga T, Kojima T, Ogihara A, Negayama K, Kumano H. Difficulties in Life: Four Years after the Great East Japan Earthquake. Eur J Public Health 2018. [DOI: 10.1093/eurpub/cky218.021] [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: 11/12/2022] Open
Affiliation(s)
- Y Tsuchiya
- Waseda University, Tokorozawa-shi, Japan
| | | | - T Iwagaki
- Waseda University, Tokorozawa-shi, Japan
| | - R Mochida
- Waseda University, Tokorozawa-shi, Japan
| | - N Ishikawa
- Waseda University, Tokorozawa-shi, Japan
| | | | - K Masuda
- Waseda University, Tokorozawa-shi, Japan
| | - T Taga
- Waseda University, Tokorozawa-shi, Japan
| | - T Kojima
- Waseda University, Tokorozawa-shi, Japan
| | - A Ogihara
- Waseda University, Tokorozawa-shi, Japan
| | - K Negayama
- Waseda University, Tokorozawa-shi, Japan
| | - H Kumano
- Waseda University, Tokorozawa-shi, Japan
| |
Collapse
|
18
|
Enomoto Y, Nakatani H, Kondo S, Kasai T, Tsuchiya Y. Drug-induced oral lichenoid reaction during nivolumab therapy. Int J Oral Maxillofac Surg 2018; 48:488-491. [PMID: 30170775 DOI: 10.1016/j.ijom.2018.07.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [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: 02/09/2018] [Revised: 05/14/2018] [Accepted: 07/17/2018] [Indexed: 11/19/2022]
Abstract
Oral lichenoid reaction, an immune-related adverse event of immunotherapy, has been reported in very few patients receiving anti-programmed cell death receptor-1 (anti-PD-1) therapy. Here, we describe a case of severe stomatitis (grade ≥3 by the Common Terminology Criteria for Adverse Events, version 4.0) accompanied by pharyngolaryngitis that was observed in a patient receiving nivolumab therapy. The stomatitis was diagnosed as drug-induced lichenoid reaction. Nivolumab therapy was discontinued, and the patient was administered systemic prednisolone (1mg/kg). Most of the patient's mucosal changes in the oral cavity and pharyngolarynx resolved within approximately 3 weeks after starting the prednisolone. Clinicians should be aware that severe oral lichenoid reactions can occur in patients receiving anti-PD-1 therapy.
Collapse
Affiliation(s)
- Y Enomoto
- Department of Oral and Maxillofacial Surgery, Tochigi Cancer Center, Japan.
| | - H Nakatani
- Department of Otolaryngology, Head and Neck Surgery, National Hospital Organization Fukuyama Medical Center, Japan
| | - S Kondo
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Fukuoka University, Japan
| | - T Kasai
- Department of Medical Oncology, Division of Thoracic Oncology, Tochigi Cancer Center, Japan
| | - Y Tsuchiya
- Department of Oral and Maxillofacial Surgery, Tochigi Cancer Center, Japan
| |
Collapse
|
19
|
Inui M, Baron AQR, Kajihara Y, Matsuda K, Hosokawa S, Kimura K, Tsuchiya Y, Shimojo F, Yao M, Tsutsui S, Ishikawa D, Tamura K. Viscoelastic anomaly accompanying anti-crossing behaviour in liquid As 2Se 3. J Phys Condens Matter 2018; 30:28LT02. [PMID: 29873306 DOI: 10.1088/1361-648x/aacab5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We investigate the dynamic structure factor of the melt of the well known glass former, As2Se3, using inelastic x-ray scattering for temperatures, T, [Formula: see text] K and momentum transfers Q from [Formula: see text] nm-1. An anomaly was observed at Q = 2.7 nm-1 ([Formula: see text] K) with, in the context of a simple model, both an abrupt change in frequency and an increased linewidth reminiscent of an anti-crossing in a solid. Comparison with structural information from reverse Monte Carlo modeling of x-ray diffraction data allows us to associate the disappearance of the anomaly at higher temperatures with a drop in the number of mechanical constraints per atom, n mc, to [Formula: see text] reminiscent of the threshold applicable for glass formation in rigidity theory. It is inferred that the surprising jump in the dispersion in the liquid may be correlated with a stiffness transition in a network glass.
Collapse
Affiliation(s)
- M Inui
- Graduate School of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8521, Japan
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Noguchi T, Sarukawa S, Tsuchiya Y, Okada N, Hayasaka J, Sasaguri K, Nishino H, Jinbu Y, Mori Y. Evaluation of postoperative changes in vascularized iliac bone grafts used for mandibular reconstruction. Int J Oral Maxillofac Surg 2018; 47:990-997. [PMID: 29606562 DOI: 10.1016/j.ijom.2018.03.002] [Citation(s) in RCA: 3] [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: 04/06/2017] [Revised: 03/02/2018] [Accepted: 03/07/2018] [Indexed: 11/26/2022]
Abstract
Vascularized iliac bone grafts are used for mandibular reconstruction, but the factors affecting graft maintenance are unknown. This study explored the postsurgical changes in vascularized iliac bone grafts in patients who had undergone mandibular reconstruction after segmental resection. The study involved 24 patients (16 men and eight women) with oral tumours or osteoradionecrosis. Thirteen patients required bare bone grafting (BBG) and 11 patients required reconstruction with soft tissue coverage (six with a skin paddle and five with direct closure). The bone graft maintenance rate (with regard to the height of the centre of the graft) was calculated immediately after surgery and at 3, 6, 12, 24, and 36months after surgery. The maintenance rate was significantly lower in the BBG group than in the soft tissue coverage group at 3, 6, 12, 24, and 36months, and in those who were fitted with dentures compared to those who were not at 6, 12, 24, and 36months. Local infection also influenced the maintenance rate, but not significantly so. These findings indicate that the reconstruction technique and denture use can affect the bone graft maintenance rate after mandibular reconstruction with vascularized iliac bone grafts.
Collapse
Affiliation(s)
- T Noguchi
- Department of Dentistry, Oral and Maxillofacial Surgery, Jichi Medical University, Tochigi, Japan.
| | - S Sarukawa
- Department of Plastic Surgery, Jichi Medical University, Tochigi, Japan
| | - Y Tsuchiya
- Department of Dentistry, Oral and Maxillofacial Surgery, Jichi Medical University, Tochigi, Japan
| | - N Okada
- Department of Dentistry, Oral and Maxillofacial Surgery, Jichi Medical University, Tochigi, Japan
| | - J Hayasaka
- Department of Dentistry, Oral and Maxillofacial Surgery, Jichi Medical University, Tochigi, Japan
| | - K Sasaguri
- Department of Dentistry, Oral and Maxillofacial Surgery, Jichi Medical University, Tochigi, Japan
| | - H Nishino
- Department of Otolaryngology, Head and Neck Surgery, Jichi Medical University, Tochigi, Japan
| | - Y Jinbu
- Department of Dentistry, Oral and Maxillofacial Surgery, Jichi Medical University, Tochigi, Japan
| | - Y Mori
- Department of Dentistry, Oral and Maxillofacial Surgery, Jichi Medical University, Tochigi, Japan
| |
Collapse
|
21
|
Tsuchiya Y, Saito M, Kadokura H, Miyazaki JI, Tashiro F, Imagawa Y, Iwawaki T, Kohno K. IRE1-XBP1 pathway regulates oxidative proinsulin folding in pancreatic β cells. J Cell Biol 2018; 217:1287-1301. [PMID: 29507125 PMCID: PMC5881499 DOI: 10.1083/jcb.201707143] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 12/06/2017] [Accepted: 01/22/2018] [Indexed: 11/22/2022] Open
Abstract
In mammalian pancreatic β cells, the IRE1α-XBP1 pathway is constitutively and highly activated under physiological conditions. To elucidate the precise role of this pathway, we constructed β cell-specific Ire1α conditional knockout (CKO) mice and established insulinoma cell lines in which Ire1α was deleted using the Cre-loxP system. Ire1α CKO mice showed the typical diabetic phenotype including impaired glycemic control and defects in insulin biosynthesis postnatally at 4-20 weeks. Ire1α deletion in pancreatic β cells in mice and insulinoma cells resulted in decreased insulin secretion, decreased insulin and proinsulin contents in cells, and decreased oxidative folding of proinsulin along with decreased expression of five protein disulfide isomerases (PDIs): PDI, PDIR, P5, ERp44, and ERp46. Reconstitution of the IRE1α-XBP1 pathway restored the proinsulin and insulin contents, insulin secretion, and expression of the five PDIs, indicating that IRE1α functions as a key regulator of the induction of catalysts for the oxidative folding of proinsulin in pancreatic β cells.
Collapse
Affiliation(s)
- Yuichi Tsuchiya
- Graduate School of Biological Sciences and Institute for Research Initiatives, Nara Institute of Science and Technology, Ikoma, Japan
| | - Michiko Saito
- Graduate School of Biological Sciences and Institute for Research Initiatives, Nara Institute of Science and Technology, Ikoma, Japan.,Bio-science Research Center, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Hiroshi Kadokura
- Graduate School of Biological Sciences and Institute for Research Initiatives, Nara Institute of Science and Technology, Ikoma, Japan.,Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Japan
| | - Jun-Ichi Miyazaki
- Division of Stem Cell Regulation Research, Osaka University Graduate School of Medicine, Suita, Japan
| | - Fumi Tashiro
- Division of Stem Cell Regulation Research, Osaka University Graduate School of Medicine, Suita, Japan
| | - Yusuke Imagawa
- Graduate School of Biological Sciences and Institute for Research Initiatives, Nara Institute of Science and Technology, Ikoma, Japan.,Department of Molecular and Cellular Biology, Research Center, Osaka International Cancer Institute, Osaka, Japan
| | - Takao Iwawaki
- Division of Cell Medicine, Department of Life Science, Medical Research Institute, Kanazawa Medical University, Uchinada, Japan
| | - Kenji Kohno
- Graduate School of Biological Sciences and Institute for Research Initiatives, Nara Institute of Science and Technology, Ikoma, Japan
| |
Collapse
|
22
|
Ota K, Harada T, Otsubo K, Fujii A, Tsuchiya Y, Tanaka K, Okamoto I, Nakanishi Y. A new tool to visualize and quantificate activated epidermal growth factor receptor homodimerization with proximity lagation assay in lung cancer. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx672.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
23
|
El-Nahass E, El-Habashi N, El-Dakhly KM, Tsuchiya Y, Yanai T. Effect of Mouse Strain on Equine Herpesvirus 9 Infection. J Comp Pathol 2017; 157:67-74. [PMID: 28735674 DOI: 10.1016/j.jcpa.2017.06.002] [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: 12/06/2016] [Revised: 06/05/2017] [Accepted: 06/05/2017] [Indexed: 10/19/2022]
Abstract
The infectivity of equine herpesvirus (EHV)-9 has been studied in different animal models including immunocompromised animals. The current study focused on the infectivity of EHV-9 in different mouse strains (C3H, C57BL, DBA, BALB/c-nu/nu, BALB/c and ICR) by intranasal inoculation of 2 × 106 plaque forming units (PFU). Various organs, including head and lungs, were collected 7 days post infection (dpi) to investigate microscopical lesions and the distribution of EHV-9 antigen. Immunopositivity of tissue sections was scored using ImageJ software. Open reading frame (ORF) 30 expression in lung tissues was quantified using quantitative reverse transcriptase polymerase chain reaction. Pathological examination revealed different degrees of rhinitis in the different mouse strains. Severe rhinitis was detected in C3H and BALB/c-nu/nu strains, moderate rhinitis was observed in C57BL and DBA strains and no lesions were detected in BALB/c mice. Immunopositivity for EHV-9 antigens was detected in the olfactory epithelium of C3H and BALB/c-nu/nu strains. Compared with C57BL, DBA, BALB/c-nu/nu, ICR and BALB/c strains, the C3H strain showed greater expression of EHV-9 antigens in the brain. The proportion of areas with high positive to positive immunoreactivity for EHV-9 were 7.57, 3.42, 3.12, 2.51, 1.79 and 0.03% for C3H, C57BL, DBA, BALB/c-nu/nu, ICR and BALB/c strains, respectively. The proportions of areas with low positive to negative immunoreactivity were 92.42, 96.70, 96.87, 97.48, 98.16 and 99.96%, respectively. The highest relative expression levels for EHV-9 ORF30 in the lungs were in C3H mice. No significant differences in the expression of ORF30 were observed in other strains. In conclusion, of the strains examined, C3H, C57BL, DBA, BALB/c-nu/nu and ICR were the most susceptible to EHV-9 infection, and the BALB/c strain was less susceptible.
Collapse
Affiliation(s)
- E El-Nahass
- Department of Veterinary Pathology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef 62511, Egypt
| | - N El-Habashi
- Department of Veterinary Pathology, Faculty of Veterinary Medicine, Kafr El-Sheikh University, Egypt
| | - Kh M El-Dakhly
- Department of Veterinary Parasitology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Y Tsuchiya
- Department of Veterinary Pathology, Faculty of Applied Biological Science, Gifu University, 1-1 Yanagido, Gifu, Japan
| | - T Yanai
- Department of Veterinary Pathology, Faculty of Applied Biological Science, Gifu University, 1-1 Yanagido, Gifu, Japan.
| |
Collapse
|
24
|
Abstract
The endoplasmic reticulum (ER) is an organelle in which newly synthesized secretory and membrane proteins are folded and assembled. Various stresses cause the accumulation of unfolded or misfolded proteins in the ER, resulting in ER dysfunction. This condition is termed ER stress. To cope with ER stress, cells activate a signaling pathway termed the unfolded protein response (UPR). Recently, accumulating evidence suggests that the UPR plays a pivotal role in pancreatic β cells. Pancreatic β cells producing a large amount of insulin are highly sensitive when the UPR is impaired. In mammalian cells, three principal ER stress sensors, PERK, IRE1, and ATF6, initiate the UPR. Activated PERK attenuates protein translation through eIF2α phosphorylation to cope with the ER stress. PERK KO mice develop diabetes by 2-4 weeks of age due to progressive β-cell loss. IRE1α noncanonically splices the XBP1 mRNA, leading to the upregulation of the ERAD components and ER molecular chaperones. This pathway is constitutively activated in pancreatic β cells. To clarify the physiological role of the IRE1α pathway in β cells, we generated pancreatic-β-cell-specific IRE1α-conditional KO (cKO) mice and IRE1α-cKO insulinoma cell lines. Here, we show that IRE1α is required for the upregulation of insulin-folding enzymes in pancreatic β cells to balance insulin-folding enzymes with insulin.
Collapse
Affiliation(s)
- Yuichi Tsuchiya
- Nara Institute of Science and Technology, Graduate School of Biological Sciences, Laboratory of Molecular and Cell Genetics
| | | | | |
Collapse
|
25
|
Abstract
IRE1α plays an important role in the unfolded protein response (UPR), which is activated by the accumulation of unfolded proteins in the endoplasmic reticulum. 4μ8C, a well-known inhibitor of IRE1α RNase activity, is commonly used to analyze IRE1α function during ER stress in cultured mammalian cells. However, the off-target effects of 4μ8C remain elusive. Pancreatic β-cells synthesize a large amount of insulin in response to high glucose stimulation, and IRE1α plays an important role in insulin secretion from pancreatic β-cells. Here, to analyze the role of IRE1α in pancreatic β-cells, we examined insulin secretion after 4μ8C treatment. Although 4μ8C inhibited insulin secretion within 2 hr, neither insulin synthesis nor maturation was inhibited by 4μ8C under the same conditions. This result prompted us to examine the precise effects of 4μ8C on insulin secretion in pancreatic β-cells. Unexpectedly, with just 5 min of treatment, 4μ8C blocked insulin secretion in cultured pancreatic β-cells as well as in pancreatic islets. Furthermore, insulin secretion was prevented by 4μ8C, even in pancreatic β-cells lacking the IRE1α RNase domain, suggesting that 4μ8C blocked the late stage of the insulin secretory process, independent of the IRE1α-XBP1 pathway. Our results indicate that 4μ8C has an off-target effect on insulin secretion in pancreatic β-cells. These findings inform the researchers in the field that the use of 4μ8C requires the special consideration for the future studies.Key words: 4μ8C, XBP1, insulin, IRE1α, pancreatic β-cells.
Collapse
Affiliation(s)
- Hitomi Sato
- Laboratory of Molecular and Cell Genetics, Graduate School of Biological Sciences, Nara Institute of Science and Technology
| | - Yoko Shiba
- Laboratory of Molecular and Cell Genetics, Graduate School of Biological Sciences, Nara Institute of Science and Technology.,Faculty of Science and Engineering, Iwate University
| | - Yuichi Tsuchiya
- Laboratory of Molecular and Cell Genetics, Graduate School of Biological Sciences, Nara Institute of Science and Technology
| | - Michiko Saito
- Laboratory of Molecular and Cell Genetics, Graduate School of Biological Sciences, Nara Institute of Science and Technology
| | - Kenji Kohno
- Laboratory of Molecular and Cell Genetics, Graduate School of Biological Sciences, Nara Institute of Science and Technology
| |
Collapse
|
26
|
Suetsugu K, Ikesue H, Miyamoto T, Shiratsuchi M, Yamamoto-Taguchi N, Tsuchiya Y, Matsukawa K, Uchida M, Watanabe H, Akashi K, Masuda S. Analysis of the variable factors influencing tacrolimus blood concentration during the switch from continuous intravenous infusion to oral administration after allogeneic hematopoietic stem cell transplantation. Int J Hematol 2016; 105:361-368. [DOI: 10.1007/s12185-016-2135-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 10/31/2016] [Accepted: 11/02/2016] [Indexed: 11/25/2022]
|
27
|
Ito K, Sakaguchi T, Tsuchiya Y, Inada A, Nakajima H, Saito R. Gas Crossover Suppression by Controlling Wettability of Cathode Current Collector. ACTA ACUST UNITED AC 2016. [DOI: 10.1149/07514.1107ecst] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
28
|
Mizuno S, Morii I, Tsuchiya Y, Goto K. Wearing Compression Garment after Endurance Exercise Promotes Recovery of Exercise Performance. Int J Sports Med 2016; 37:870-7. [PMID: 27454135 DOI: 10.1055/s-0042-106301] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The present study examined the effects of wearing a lower-body compression garment (CG) after endurance exercise on recovery of physiological function. 18 males were divided into 2 experiments, the downhill running (n=10, DHR) experiments and the level running (n=8, LR) experiments. Subjects performed 30 min of DHR (gradient: - 10%) or LR (gradient: 0%) at 70% of ˙VO2max with either wearing a CG (CG trial) or normal garment (CON trial) for 24 h after running. Changes in jump performance (counter movement jump; CMJ, rebound jump; RJ, drop jump; DJ), subjective feelings, circumferences of leg, and blood variables (creatine kinase, myoglobin, interleukin-6, high-sensitivity C-reactive protein) were evaluated before exercise, immediately after exercise, 1, 3 and 24 h following exercise. Running economy was evaluated at 24 h following exercise. CMJ height and RJ index were significantly higher in the CG trial than in the CON trial 24 h after running (P<0.05). Although changes in muscle soreness and blood variables were significantly greater in the DHR experiment than in the LR experiment, there was no significant difference between the trials in either experiment. Wearing a CG following endurance exercise facilitated recovery of jump performance under situations with severe exercise-induced muscle damage.
Collapse
Affiliation(s)
- S Mizuno
- Graduate School of Sports and Health Science, Ritsumeikan University, Kusatsu, Japan
| | - I Morii
- Graduate School of Sports and Health Science, Ritsumeikan University, Kusatsu, Japan
| | - Y Tsuchiya
- Graduate School of Sports and Health Science, Ritsumeikan University, Kusatsu, Japan
| | - K Goto
- Faculty of Sports and Health Science, Ritsumeikan University, Kusatsu, Japan
| |
Collapse
|
29
|
Tsuchiya Y, Shida N, Izumi S, Ogasawara M, Kakinuma W, Tsujiuchi T, Machida K. Factors associated with mothers not vaccinating their children against mumps in Japan. Public Health 2016; 137:95-105. [PMID: 27062068 DOI: 10.1016/j.puhe.2016.03.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 11/05/2015] [Accepted: 03/02/2016] [Indexed: 10/22/2022]
Abstract
OBJECTIVES In Japan, mumps immunization is not mandatory, and the prevalence of mumps immunization among eligible children is only about 30%, raising concerns about increased risk of meningitis, encephalitis and deafness caused by mumps. In 2011, to understand why families are not voluntarily immunizing their children against mumps, we surveyed mothers who were university graduates to examine the factors and barriers influencing mumps vaccination in Japan. STUDY DESIGN A cross sectional design. METHODS We sent questionnaires including questions on demographic data and vaccination status, barriers and factors for immunizations to university alumnae to recruit participants. Data were analysed by Student's t-test for continuous variables and by univariate and multivariate analysis to obtain the odds ratio and adjusted odds ratio. RESULTS Two hundred and twenty-six mothers with children responded with an average (range) age of 44.7 years (SD = 5.02; 30-55 years). Adjusted odds ratios (aOR) from logistic regression analysis identified fear of harmful side-effects (aOR, 2.55; 95% CI, 1.10 to 5.89), the vaccination not being mandatory (aOR, 3.30; 95% CI, 1.41 to 7.72), perceived non-efficacy (aOR, 6.21; 95% CI, 1.85 to 20.91) and being busy (aOR, 3.30; 95% CI, 1.21 to 9.01) were significantly and inversely associated with mumps vaccination. Recommendations from family doctors (aOR, 0.35; 95% CI, 0.17 to 0.71), living abroad when their children would be vaccinated (aOR, 0.10; 95% CI, 0.02 to 0.68) and the maternal age (aOR, 0.91; 95% CI, 0.85 to 0.96) were significant and positively associated with vaccination. CONCLUSIONS In the absence of mandatory vaccinations, a public education campaign about mumps, their potential consequences and the nature and value of vaccination could improve the prevalence of mumps vaccination among children and prevent the consequences of this disease.
Collapse
Affiliation(s)
- Y Tsuchiya
- Advanced Research Center for Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan.
| | - N Shida
- Advanced Research Center for Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan
| | - S Izumi
- Faculty of Home Economics, Koriyama Women's University, 3-25-2, Kaisei, Koriyama, Fukushima, Japan
| | - M Ogasawara
- Department of Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan
| | - W Kakinuma
- Advanced Research Center for Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan
| | - T Tsujiuchi
- Faculty of Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan
| | - K Machida
- Faculty of Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan
| |
Collapse
|
30
|
Tsuchiya Y, Nakabayashi O, Nakano H. FLIP the Switch: Regulation of Apoptosis and Necroptosis by cFLIP. Int J Mol Sci 2015; 16:30321-41. [PMID: 26694384 PMCID: PMC4691174 DOI: 10.3390/ijms161226232] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 12/09/2015] [Accepted: 12/11/2015] [Indexed: 12/11/2022] Open
Abstract
cFLIP (cellular FLICE-like inhibitory protein) is structurally related to caspase-8 but lacks proteolytic activity due to multiple amino acid substitutions of catalytically important residues. cFLIP protein is evolutionarily conserved and expressed as three functionally different isoforms in humans (cFLIPL, cFLIPS, and cFLIPR). cFLIP controls not only the classical death receptor-mediated extrinsic apoptosis pathway, but also the non-conventional pattern recognition receptor-dependent apoptotic pathway. In addition, cFLIP regulates the formation of the death receptor-independent apoptotic platform named the ripoptosome. Moreover, recent studies have revealed that cFLIP is also involved in a non-apoptotic cell death pathway known as programmed necrosis or necroptosis. These functions of cFLIP are strictly controlled in an isoform-, concentration- and tissue-specific manner, and the ubiquitin-proteasome system plays an important role in regulating the stability of cFLIP. In this review, we summarize the current scientific findings from biochemical analyses, cell biological studies, mathematical modeling, and gene-manipulated mice models to illustrate the critical role of cFLIP as a switch to determine the destiny of cells among survival, apoptosis, and necroptosis.
Collapse
Affiliation(s)
- Yuichi Tsuchiya
- Department of Biochemistry, Toho University School of Medicine, Tokyo 143-8540, Japan.
| | - Osamu Nakabayashi
- Department of Biochemistry, Toho University School of Medicine, Tokyo 143-8540, Japan.
| | - Hiroyasu Nakano
- Department of Biochemistry, Toho University School of Medicine, Tokyo 143-8540, Japan.
| |
Collapse
|
31
|
Tsuchiya Y, Matsuo N, Cho H, Tsubouchi K, Kumagai M, Nishii Y, Nanjoh M, Yamamoto T. Vitamin D and vitamin D dependency. Contrib Nephrol 2015; 22:89-100. [PMID: 6967387 DOI: 10.1159/000385991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Administration of large doses of vitamin D2 brought about a marked increase of 25-hydroxyvitamin D in both the patients with vitamin D dependency and hypophosphatemic vitamin D-resistant rickets. During the administration of vitamin D2, increment of 1,25-dihydroxyvitamin D was marked in hypophosphatemic vitamin D-resistant rickets, but far smaller in vitamin D dependency. In the latter, however, the 1,25-dihydroxyvitamin D reached the level close to the normal adult values. 1 alpha-hydroxyvitamin D3 was found 50 approximately 100 times as effective as vitamin D2 in 2 patients with vitamin D dependency (optimum maintenance dose: 0.05 micrograms/kg/day). It was concluded that 1 alpha-hydroxylation in the renal tubules is markedly defective in the patients with vitamin D dependency, but that a large dose of vitamin D2 is able to cause a definite increase in serum concentration of 1,25-dihydroxyvitamin D resulting in improvement of the rickets.
Collapse
|
32
|
Mathuranyanon R, Tsukamoto T, Takeuchi A, Ishiwata-Kimata Y, Tsuchiya Y, Kohno K, Kimata Y. Tight regulation of the unfolded protein sensor Ire1 by its intramolecularly antagonizing subdomain. J Cell Sci 2015; 128:1762-72. [PMID: 25770101 PMCID: PMC4432228 DOI: 10.1242/jcs.164111] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 03/05/2015] [Indexed: 01/01/2023] Open
Abstract
Accumulation of unfolded proteins in the endoplasmic reticulum (ER) accompanies ER stress and causes the type-I transmembrane protein Ire1 (also known as ERN1) to trigger the unfolded protein response (UPR). When dimerized, the core stress-sensing region (CSSR) of Ire1 directly captures unfolded proteins and forms a high-order oligomer, leading to clustering and activation of Ire1. The CSSR is N-terminally flanked by an intrinsically disordered subdomain, which we previously named Subregion I, in Saccharomyces cerevisiae Ire1. In this study, we describe tight repression of Ire1 activity by Subregion I under conditions of no or weak stress. Weak hyperactivation of an Ire1 mutant lacking Subregion I slightly retarded growth of yeast cells cultured under unstressed conditions. Fungal Ire1 orthologs and the animal Ire1 family protein PERK (also known as EIF2AK3) carry N-terminal intrinsically disordered subdomains with a similar structure and function to that of Subregion I. Our observations presented here cumulatively indicate that Subregion I is captured by the CSSR as an unfolded protein substrate. This intramolecular subdomain interaction is likely to compromise self-association of the CSSR, explaining why Subregion I can suppress Ire1 activity when ER-accumulated unfolded proteins are not abundant.
Collapse
Affiliation(s)
- Rubwad Mathuranyanon
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Tomoko Tsukamoto
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Asumi Takeuchi
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Yuki Ishiwata-Kimata
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Yuichi Tsuchiya
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Kenji Kohno
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Yukio Kimata
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| |
Collapse
|
33
|
Tsuchiya Y, Murai S, Yamashita S. Dual inhibition of Cdc2 protein kinase activation during apoptosis inXenopusegg extracts. FEBS J 2015; 282:1256-70. [DOI: 10.1111/febs.13217] [Citation(s) in RCA: 7] [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] [Received: 07/25/2014] [Revised: 01/12/2015] [Accepted: 01/26/2015] [Indexed: 11/27/2022]
Affiliation(s)
- Yuichi Tsuchiya
- Department of Biochemistry; Toho University School of Medicine; Ota-ku Tokyo Japan
| | - Shin Murai
- Department of Biochemistry; Toho University School of Medicine; Ota-ku Tokyo Japan
| | - Shigeru Yamashita
- Department of Biochemistry; Toho University School of Medicine; Ota-ku Tokyo Japan
| |
Collapse
|
34
|
Katahira K, Yoshikawa T, Enoki H, Teraoka A, Tsuchiya Y. Is the evidence of the Supreme Court Ruling of gefitinib litigation in Japan scientific? Int J Risk Saf Med 2014; 26:227-33. [PMID: 25420764 DOI: 10.3233/jrs-140637] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Plaintiffs of the gefitinib (Iressa) lawsuits in Japan started in 2004 were defeated in the Supreme Court in 2013. The Court judged it was not possible to foresee the outbreak of deaths caused by interstitial pneumonia due to gefitinib from death cases before approval of this drug. OBJECTIVE We attempted to verify validity of this judgment. METHODS We estimated the 95% confidence interval (CI) of the proportion of onset and death cases among 23 onset and 13 death cases occurring from "within 1 week" to "within 4 weeks" from clinical data before approval of this drug using data admitted to the Court. RESULTS For death cases, all of the upper limits of the 95% CI exceeded 50% within 1-4 weeks. This fact suggested that the cases of acute interstitial pneumonia were included in the clinical trial before the approval of gefitinib. CONCLUSION It was possible to foresee the outbreak of death cases after drug approval. This conclusion showed the Court's ruling was not reasonable and was unscientific.
Collapse
Affiliation(s)
- K Katahira
- Faculty of Social Welfare, Niigata University of Health and Welfare, Niigata, Japan Institute of Clinical and Social Pharmacy, Saitama, Japan
| | - T Yoshikawa
- Institute of Clinical and Social Pharmacy, Saitama, Japan
| | - H Enoki
- Postgraduate student of Niigata University of Health and Welfare, Niigata, Japan
| | - A Teraoka
- Drug Information Center Asahi, Osaka, Japan
| | - Y Tsuchiya
- Graduate School of Human Science, Waseda University, Tokyo, Japan
| |
Collapse
|
35
|
Tsuchiya Y, Kawai S, Tazawa K, Yamagishi H, Arai H, Manabe T, Sekine S, Okumura T, Nagata T, Tsukada K. 251. Is laparoscopy-assisted colectomy superior to open colectomy? Comparison of the long term postoperative course and prognosis. Eur J Surg Oncol 2014. [DOI: 10.1016/j.ejso.2014.08.243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
36
|
Tsuchiya Y, Sakuraba K, Ochi E. Effect of eccentric contractions of elbow flexor on bone formation and resorption markers. J Sports Med Phys Fitness 2014; 54:651-657. [PMID: 25270785] [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: 06/03/2023]
Abstract
AIM This study aimed to investigate the effects of eccentric contractions (ECs) of the biceps brachii muscle on bone metabolism markers. METHODS Eight untrained subjects (20.0±0.5 years) performed 5 sets of 6 maximal ECs of the elbow flexors with a 2-min rest interval between each set. Blood samples were collected at 6 time points: before (Pre) ECs, immediately after (Post) ECs, and two hours (2 hours), 1 (day 1), 3 (days 3), and 5 days (days 5) after ECs. We measured the levels of the bone formation marker osteocalcin (OC) and the resorption marker tartrate-resistant acid phosphatase 5b (TRACP-5b). In addition, we measured the isometric tetanic torque and the levels of myoglobin (Mb), creatine kinase (CK), blood lactate, and insulin-like growth factor-1 (IGF-1). RESULTS The results showed 1) CK and Mb levels increased significantly by days 3 and 5 (P<0.05); 2) OC levels significantly decreased in Post and 2 hours (P<0.01) and TRACP-5b levels significantly increased in Post (P<0.01); 3) OC positively correlated with the total work output in Post, 2 hours, and days 5 (Post: r=0.79, P<0.05; 2 hours: r=0.82, P<0.01; days 5: r=0.79, P<0.05); and 4) TRACP-5b levels positively correlated with IGF-1 levels (r=0.69, P<0.01). CONCLUSION We conclude that a single bout of ECs of the biceps has a negative effect on bone metabolism in the acute phase.
Collapse
Affiliation(s)
- Y Tsuchiya
- Graduate School of Medicine, Juntendo University, Tokyo, Japan - ochi @gen.meijigakuin.ac.jp
| | | | | |
Collapse
|
37
|
Tsuchiya Y, Sakuraba K, Ochi E. High force eccentric exercise enhances serum tartrate-resistant acid phosphatase-5b and osteocalcin. J Musculoskelet Neuronal Interact 2014; 14:50-57. [PMID: 24583540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We investigated the effects of eccentric contractions (ECs) on bone metabolism markers and the relationship between bone metabolism and skeletal muscle related protein. Seventeen young untrained men were divided into two groups and performed either 60 or 30 maximal ECs. We measured serum levels of osteocalcin (OC), bone alkaline phosphatase, cross-linked N-telopeptide of type I collagen (NTx), and tartrate-resistant acid phosphatase 5b (TRACP-5b), growth hormone (GH), and insulin-like growth factor-1 (IGF-1). Blood samples were collected for up to five days after ECs. OC with 60 ECs were significantly higher than with 30 ECs (2 hours; p<0.05, day 1 and day 5; p<0.01). TRACP-5b with 60 ECs were significantly higher than with 30 ECs (day 3 and day 5; p<0.001). IGF-1 and OC were significantly positively correlated with 60 ECs (2 hours, day 1, and day 5; p<0.05). There were also significant positive correlations between IGF-1 and NTx with 60 ECs (2 hours, p<0.01; day 1, p<0.05). We found that one bout of severe ECs caused increases in OC and TRACP-5b, which promote increased bone metabolism. Our results suggest that contraction-induced IGF-1 may activate OC and NTx in acute response.
Collapse
Affiliation(s)
- Y Tsuchiya
- Graduate School of Medicine, Juntendo University, 2-2-26 Hongo, Bunkyo, Tokyo, 113-0033, Japan
| | | | | |
Collapse
|
38
|
Nakaya I, Iwabuchi M, Tsuchiya Y, Shibagaki Y, Yamaguchi T, Fukuhara S, Oe Y, Yahata M, Soma J, Sato T, Taguma Y. THU0213 Cyclophosphamide has no efficacy in japanese patients with renal vasculitis associated with anti-neutrophil cytoplasmic antibody-positive microscopic polyangiitis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
39
|
Nozu T, Tsuchiya Y, Kumei S, Takakusaki K, Okumura T. Peripheral corticotropin-releasing factor (CRF) induces stimulation of gastric contractions in freely moving conscious rats: role of CRF receptor types 1 and 2. Neurogastroenterol Motil 2013. [PMID: 23205497 DOI: 10.1111/nmo.12050] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [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: 12/17/2022]
Abstract
BACKGROUND Peripheral corticotrophin-releasing factor (CRF) plays an important role in stress-induced alterations of gastrointestinal motility. CRF injected peripherally inhibits gastric emptying, but its effect on gastric contractions has not been clarified in freely moving conscious rats. METHODS Intraluminal gastric pressure waves were measured in freely moving conscious non-fasted rats using the perfused manometric method. We assessed the area under the manometric trace as the motor index (MI), and compared this result with those obtained 1 h before and after drug administration. KEY RESULTS Subcutaneous injection (sc) of CRF (15 μg kg(-1)) increased the MI significantly. Pretreatment with intravenous astressin (100 μg kg(-1)), a non-selective CRF antagonist, blocked the sc CRF (15 μg kg(-1))-induced response, but astressin(2)-B (200 μg kg(-1), sc), a selective CRF receptor type 2 (CRF(2)) antagonist, enhanced the CRF-induced increase in MI significantly. Meanwhile urocortin 2 (15 μg kg(-1), sc), a selective CRF(2) agonist, did not alter the basal MI, but it inhibited the sc CRF (15 μg kg(-1))-induced stimulation of gastric contractions. The intraperitoneal injection of cortagine (30 μg kg(-1)), a selective CRF receptor type 1 (CRF(1)) agonist, mimicked the response induced by sc CRF. CONCLUSIONS & INFERENCES Peripheral CRF stimulates gastric contractions through CRF(1). CRF(2) activation inhibits the response induced by CRF, suggesting that CRF(2) may have a modulatory action to CRF(1) signaling in gastric motor activity.
Collapse
Affiliation(s)
- T Nozu
- Department of Regional Medicine and Education, Asahikawa Medical University, Asahikawa, Japan.
| | | | | | | | | |
Collapse
|
40
|
Tsuchiya Y, Takami Y, Okuzaki Y, Sota T. Genetic differences and phenotypic plasticity in body size between high- and low-altitude populations of the ground beetle Carabus tosanus. J Evol Biol 2012; 25:1835-42. [DOI: 10.1111/j.1420-9101.2012.02568.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 05/19/2012] [Accepted: 06/05/2012] [Indexed: 11/30/2022]
Affiliation(s)
- Y. Tsuchiya
- Department of Zoology; Graduate School of Science; Kyoto University; Kyoto; Japan
| | - Y. Takami
- Graduate School of Human Development & Environment; Kobe University; Kobe; Japan
| | - Y. Okuzaki
- Department of Zoology; Graduate School of Science; Kyoto University; Kyoto; Japan
| | - T. Sota
- Department of Zoology; Graduate School of Science; Kyoto University; Kyoto; Japan
| |
Collapse
|
41
|
Meno H, Inou T, Tanaka M, Tsuchiya Y, Shiga Y, Kobayashi K, Nakamura Y, Ota T, Kubara I. Efficacy and effect on plasma B-type natriuretic peptide concentration of losartan-hydrochlorothiazide for hypertension uncontrolled by losartan-based therapy: subanalysis of a Multicentre Prospective Observational Study. Arzneimittelforschung 2012; 62:414-9. [PMID: 22773432 DOI: 10.1055/s-0032-1316376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Many patients with hypertension have difficulty achieving their target blood pressure (BP). Therefore combination therapy, for example with an angiotensin II receptor blocker (ARB) and a diuretic, may be recommended. We previously evaluated the efficacy and safety of losartan (LOS) 50 mg - hydrochlorothiazide (HCTZ) 12.5 mg, as well as its effect on the plasma concentration of B-type natriuretic peptide (BNP, a prognostic marker for cardiovascular events), in patients with hypertension uncontrolled by ≥3 months of ARB-based therapy. The present subanalysis used data from patients who received LOS-based therapy before switching to LOS-HCTZ. Efficacy, safety, and changes in blood biochemical variables including BNP were evaluated. After excluding 4 patients with protocol violations, data from 35 patients (aged 36-79 years, mean 63 years; 66% male) were used in the safety analysis. The efficacy analysis used data from the 30 patients who were followed up for 12 months. Systolic/diastolic BP decreased from 156±12/87±11 mmHg at baseline to 125±11/73±10 mmHg at 12 months (p<0.001). After 12 months, half of the patients achieved their target BP as defined by the Japanese Society of Hypertension Guidelines for the Management of Hypertension 2004. In 12 patients with baseline plasma BNP concentration ≥20 pg/mL, BNP decreased from 78.3±18.8 pg/mL to 57.3±17.7 pg/mL (p<0.01). 3 patients experienced adverse events, one of which was cardiovascular. LOS-HCTZ is efficacious, has a good safety profile, and decreases plasma BNP concentration.
Collapse
Affiliation(s)
- H Meno
- Department of Cardiology and Internal Medicine, Fukuoka Red Cross Hospital, Fukuoka, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Yumoto K, Nifuji A, Rittling S, Tsuchiya Y, Kon S, Uede T, Denhardt D, Hemmi H, Notomi T, Hayata T, Ezura Y, Nakamoto T, Noda M. Osteopontin Deficiency Suppresses Tumor Necrosis Factor-α-Induced Apoptosis in Chondrocytes. Cartilage 2012; 3:79-85. [PMID: 26069621 PMCID: PMC4297182 DOI: 10.1177/1947603511421502] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
OBJECTIVE Apoptosis of chondrocytes in articular cartilage has been observed in rheumatoid arthritis patients. However, molecules involved in such chondrocyte apoptosis in arthritic joints have not been fully understood. We previously observed that apoptosis of chondrocytes is enhanced in a murine arthritis model induced by injection with anti-type II collagen antibodies and lipopolysaccharide (mAbs/LPS), and osteopontin (OPN) deficiency suppresses chondrocyte apoptosis in this arthritis model in vivo. To understand how OPN deficiency renders resistance against chondrocyte apoptosis, we examined the cellular basis for this protection. DESIGN Chondrocytes were prepared from wild-type and OPN-deficient mouse ribs, and tumor necrosis factor (TNF)-α-induced cell death was examined based on lactate dehydrogenase (LDH) release assay and TUNEL assay. RESULTS TNF-α treatment induced LDH release in wild-type chondrocytes, while OPN deficiency suppressed such LDH release in the cultures of these cells. TNF-α-induced increase in the number of TUNEL-positive cells was observed in wild-type chondrocytes, while OPN deficiency in chondrocytes suppressed the TNF-α induction of TUNEL-positive cells. OPN deficiency suppressed TNF-α-induced increase in caspase-3 activity in chondrocytes in culture. Furthermore, OPN overexpression in chondrocytes enhanced TNF-α-induced apoptosis. CONCLUSION These results indicated that the presence of OPN in chondrocytes is involved in the susceptibility of these cells to TNF-α-induced apoptosis.
Collapse
Affiliation(s)
- K. Yumoto
- Department of Molecular Pharmacology, Tokyo Medical and Dental University, Tokyo, Japan
| | - A. Nifuji
- Department of Molecular Pharmacology, Tokyo Medical and Dental University, Tokyo, Japan
| | | | - Y. Tsuchiya
- Immuno Biological Laboratory (IBL), Maebashi Gumma, Japan
| | - S. Kon
- Hokkaido University, Sapporo, Japan
| | - T. Uede
- Hokkaido University, Sapporo, Japan
| | | | - H. Hemmi
- Department of Molecular Pharmacology, Tokyo Medical and Dental University, Tokyo, Japan,Medical Top Track (MTT) Program, Tokyo Medical and Dental University, Tokyo, Japan
| | - T. Notomi
- Department of Molecular Pharmacology, Tokyo Medical and Dental University, Tokyo, Japan
| | - T. Hayata
- Department of Molecular Pharmacology, Tokyo Medical and Dental University, Tokyo, Japan,Global Center of Excellence Program, Tokyo Medical and Dental University, Tokyo, Japan,Core to Core Program, Tokyo Medical and Dental University, Tokyo, Japan,Hard Tissue Genome Research Center, Tokyo Medical and Dental University, Tokyo, Japan
| | - Y. Ezura
- Department of Molecular Pharmacology, Tokyo Medical and Dental University, Tokyo, Japan,Global Center of Excellence Program, Tokyo Medical and Dental University, Tokyo, Japan,Core to Core Program, Tokyo Medical and Dental University, Tokyo, Japan,Hard Tissue Genome Research Center, Tokyo Medical and Dental University, Tokyo, Japan
| | - T. Nakamoto
- Department of Molecular Pharmacology, Tokyo Medical and Dental University, Tokyo, Japan,Global Center of Excellence Program, Tokyo Medical and Dental University, Tokyo, Japan,Core to Core Program, Tokyo Medical and Dental University, Tokyo, Japan,Hard Tissue Genome Research Center, Tokyo Medical and Dental University, Tokyo, Japan
| | - M. Noda
- Department of Molecular Pharmacology, Tokyo Medical and Dental University, Tokyo, Japan,Medical Top Track (MTT) Program, Tokyo Medical and Dental University, Tokyo, Japan,Global Center of Excellence Program, Tokyo Medical and Dental University, Tokyo, Japan,Core to Core Program, Tokyo Medical and Dental University, Tokyo, Japan,Hard Tissue Genome Research Center, Tokyo Medical and Dental University, Tokyo, Japan
| |
Collapse
|
43
|
Nakamura K, Saito T, Kobayashi R, Oshiki R, Oyama M, Nishiwaki T, Nashimoto M, Tsuchiya Y. C-reactive protein predicts incident fracture in community-dwelling elderly Japanese women: the Muramatsu study. Osteoporos Int 2011; 22:2145-50. [PMID: 20936400 DOI: 10.1007/s00198-010-1425-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2010] [Accepted: 09/13/2010] [Indexed: 12/21/2022]
Abstract
SUMMARY In a 6-year cohort study of 751 community-dwelling elderly Japanese women, we found that C-reactive protein (CRP) is a significant predictor of osteoporotic fracture in elderly Asian women, who have significantly lower CRP levels than Caucasians. Mechanisms explaining such an association should be further studied. INTRODUCTION While CRP, a systemic inflammation marker, is thought to be associated with osteoporosis, evidence supporting this claim has been limited. We aimed to assess the association between CRP levels and incident osteoporotic fracture in elderly women. METHODS We conducted a cohort study with a follow-up period of 6 years. The study included 751 Japanese women aged 69 years or older. We measured serum high-sensitivity CRP (hs-CRP) levels as a major predictor. Covariates included age, body mass index, forearm bone mineral density, calcium intake, serum 25-hydroxyvitamin D, postural sway, osteoporosis medication, and physical activity. The primary outcome was incident limb and vertebral fractures. The Cox proportional hazards model was used to calculate the hazard ratio (HR) of fracture. RESULTS Median hs-CRP values in study participants were 0.16 mg/L in the lowest tertile, 0.36 mg/L in the medium tertile, and 1.14 mg/L in the highest tertile. The hs-CRP values in these women were substantially lower than in their Caucasian counterparts. Limb or vertebral fractures occurred in 50 subjects during 4,250 person-years. Low CRP levels were associated with low incidence of limb or vertebral fractures (P for trend = 0.035). The adjusted HRs of fracture for the medium and highest quartiles of hs-CRP levels, compared to the lowest quartile, were 2.22 (95% CI, 1.02-4.84) and 2.40 (95% CI, 1.10-5.24), respectively. CONCLUSIONS CRP is a significant predictor of osteoporotic fracture in elderly Asian women who have substantially lower CRP levels than Caucasians. Mechanisms explaining such an association should be further studied.
Collapse
Affiliation(s)
- K Nakamura
- Department of Community Preventive Medicine, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Narita M, Konishi I, Tsuchiya Y. Thermodynamics of liquid-liquid crossover transition in liquid Si15Te85eutectic alloy. EPJ Web of Conferences 2011. [DOI: 10.1051/epjconf/20111501021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
45
|
|
46
|
Abstract
Xenopus egg extracts execute spontaneous apoptosis without the requirement of transcription and translation, and this intrinsic mechanism is supposed to be involved in the physiological elimination of aged eggs. Although apoptosis in this system is carried out by maternally stockpiled materials, the endogenous apoptosis regulators present in egg extracts are still poorly characterized. Here we examined the mRNA expression profiles and apoptosis-regulating functions of 13 Xenopus Bcl-2 family proteins in egg extracts. Among these, we found that endogenous Xenopus Mcl-1 (xMcl-1) physiologically inhibited apoptosis by counteracting the pro-apoptotic activity of endogenous Xenopus Bid in egg extracts. Exogenously added recombinant xMcl-1 was rapidly degraded by proteasome in egg extracts, and we identified the destabilizing region in the N terminus of xMcl-1. Our results suggest that the proteolytic decay of xMcl-1 may change the functional balance between pro- and anti-apoptotic activities of Bcl-2 family proteins, thereby regulating the timing of cytochrome c release in egg extracts.
Collapse
Affiliation(s)
- Yuichi Tsuchiya
- Department of Biochemistry, Toho University School of Medicine, Tokyo, Japan
| | | |
Collapse
|
47
|
Gross ME, Lingk C, Siegrist T, Coleman E, Brown WL, Ueno K, Tsuchiya Y, Itoh N, Ritzdorf T, Turner J, Gibbons K, Klawuhn E, Biberger M, Lai WYC, Miner JF, Wu G, Zhang F. Microstructure and Texture of Electroplated Copper in Damascene Structures. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-514-293] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTThe transition from Al to Cu for advanced ULSI interconnects involves changes in architecture and deposition technique that will influence the microstructure and texture of the metal. Cu interconnects are typically formed within the confines of pre-patterned trenches and vias using an electroplating process with a sputtered Cu conduction layer deposited over a refractory metalbased diffusion barrier layer. In this paper, we focus on the influence of the barrier layer (PVD Ti/TiN, Ta, TaN, CVD TiN) and the effect of a vacuum break between barrier and conduction layer depositions, on the texture of the Cu lines, as examined by X-ray diffraction pole figure analysis.A preferred (111) orientation was observed for all samples. The samples with no vacuum break between barrier and conduction layer deposition exhibited in plane anisotropy that was particularly pronounced for the Ta and TaN samples compared with the Ti/TiN sample. Focused ion beam images and transmission electron micrographs showed Cu grain size to be on the order of the trench width with a high degree of twinning, and no boundary could be distinguished between the PVD Cu conduction layer and the electroplated Cu.
Collapse
|
48
|
Endoh H, Hisakabe M, Kojima Y, Kakimuma F, Tsuchiya Y. Two melts phase separation in the liquid Sb-Sb 2S 3system: critical sound wave propagation and metal-non-metal transition. EPJ Web of Conferences 2011. [DOI: 10.1051/epjconf/20111501019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
49
|
Kanno Y, Nakamura T, Machida S, Tsuchiya Y, Itami T. NMR investigation of ionic motion in LiI-KI in the liquid state. EPJ Web of Conferences 2011. [DOI: 10.1051/epjconf/20111502006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
50
|
Nakamura K, Saito T, Oyama M, Oshiki R, Kobayashi R, Nishiwaki T, Nashimoto M, Tsuchiya Y. Vitamin D sufficiency is associated with low incidence of limb and vertebral fractures in community-dwelling elderly Japanese women: the Muramatsu Study. Osteoporos Int 2011; 22:97-103. [PMID: 20333358 DOI: 10.1007/s00198-010-1213-6] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2010] [Accepted: 02/03/2010] [Indexed: 12/25/2022]
Abstract
UNLABELLED Data on the association between vitamin D status and osteoporotic fracture in Asians are sparse. We conducted a 6-year cohort study of 773 community-dwelling elderly Japanese women and found that serum 25-hydroxyvitamin D (25(OH)D) ≥ 71 nmol/L was associated with a reduced risk of osteoporotic limb and vertebral fractures. INTRODUCTION Data on the association between vitamin D status and osteoporotic fracture in Asians are sparse. This study aimed to clarify the association between vitamin D and other markers of nutritional status with the incidence of fracture in elderly Japanese women. METHODS We conducted a cohort study with a 6-year follow-up of 773 community-dwelling women aged 69 years and older. The 6-year follow-up ended in 2009. We assessed serum 25-hydroxyvitamin D, undercarboxylated osteocalcin (an index of vitamin K status), and calcium intake. The primary outcome was incident limb and vertebral fractures. Covariates were forearm bone mineral density (BMD), age, body mass index, osteoporosis treatment, and physical activity. RESULTS The mean serum 25(OH)D concentration was 60.0 nmol/L. Thirty-seven limb fractures and 14 vertebral fractures occurred in 4,392 person-years. Lower forearm BMD was significantly associated with increased incident fracture (P = 0.0242). The adjusted hazard ratios (HR) of fracture for the first quartile (<47.7 nmol/L) and the third quartile (59.2-70.9 nmol/L) of serum 25(OH)D, compared to the fourth quartile (≥71.0 nmol/L), were 2.82 (95% confidence interval (CI), 1.09-7.34) and 2.82 (95%CI, 1.09-7.27), respectively. The pooled adjusted HR was 0.42 (95%CI, 0.18-0.99) when the incidence in the fourth quartile (≥71.0 nmol/L) was compared to the other three quartiles combined (<71.0 nmol/L). Vitamin K status and calcium intake were not associated with incident fracture. CONCLUSIONS Sufficient vitamin D status, i.e., serum 25(OH)D ≥ 71 nmol/L, is associated with low limb and vertebral fracture risk in community-dwelling elderly women.
Collapse
Affiliation(s)
- K Nakamura
- Department of Community Preventive Medicine, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan.
| | | | | | | | | | | | | | | |
Collapse
|