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Furumoto T, Yamaoka S, Kohchi T, Motose H, Takahashi T. Thermospermine Is an Evolutionarily Ancestral Phytohormone Required for Organ Development and Stress Responses in Marchantia Polymorpha. Plant Cell Physiol 2024; 65:460-471. [PMID: 38179828 PMCID: PMC11020214 DOI: 10.1093/pcp/pcae002] [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] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 12/29/2023] [Accepted: 01/03/2024] [Indexed: 01/06/2024]
Abstract
Thermospermine suppresses auxin-inducible xylem differentiation, whereas its structural isomer, spermine, is involved in stress responses in angiosperms. The thermospermine synthase, ACAULIS5 (ACL5), is conserved from algae to land plants, but its physiological functions remain elusive in non-vascular plants. Here, we focused on MpACL5, a gene in the liverwort Marchantia polymorpha, that rescued the dwarf phenotype of the acl5 mutant in Arabidopsis. In the Mpacl5 mutants generated by genome editing, severe growth retardation was observed in the vegetative organ, thallus, and the sexual reproductive organ, gametangiophore. The mutant gametangiophores exhibited remarkable morphological defects such as short stalks, fasciation and indeterminate growth. Two gametangiophores fused together, and new gametangiophores were often initiated from the old ones. Furthermore, Mpacl5 showed altered responses to heat and salt stresses. Given the absence of spermine in bryophytes, these results suggest that thermospermine has a dual primordial function in organ development and stress responses in M. polymorpha. The stress response function may have eventually been assigned to spermine during land plant evolution.
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Affiliation(s)
- Takuya Furumoto
- Department of Biological Science, Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, Tsushimanaka 3-1-1, Okayama, 700-8530 Japan
| | - Shohei Yamaoka
- Graduate School of Biostudies, Kyoto University, Kyoto, 606-8502 Japan
| | - Takayuki Kohchi
- Graduate School of Biostudies, Kyoto University, Kyoto, 606-8502 Japan
| | - Hiroyasu Motose
- Department of Biological Science, Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, Tsushimanaka 3-1-1, Okayama, 700-8530 Japan
| | - Taku Takahashi
- Department of Biological Science, Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, Tsushimanaka 3-1-1, Okayama, 700-8530 Japan
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Kawabuchi Y, Suzuki T, Wada Y, Sunada Y. Reductive Retrocyclization of a Mangana(II)cyclopentasilane to Form Manganese(0) Bis(η 2-disilene) Complexes. Angew Chem Int Ed Engl 2024; 63:e202319804. [PMID: 38329155 DOI: 10.1002/anie.202319804] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/07/2024] [Accepted: 02/07/2024] [Indexed: 02/09/2024]
Abstract
Ligand-exchange reactions on a mangana(II)cyclopentasilane complex that contains two THF ligands with aryl isocyanides led to the formation of manganese(0) bis(η2-disilene) complexes via a retrocyclization. In stark contrast, ligand-exchange reactions with CNtBu, an N-heterocyclic carbene, or pyridine-based ligands furnished manganese(II) complexes wherein the manganacyclopentasilane framework remained intact. The thermolysis of the obtained bis(η2-disilene) complex in the presence of mesityl isocyanide led to the formation of a cyclotetrasilane via the formal dimerization of the two η2-disilene moieties. The insertion of a mesityl isocyanide into the Mn-Siβ bond results in the formation of a manganese(II) complex supported by a [SiCSi]-type tridentate ligand scaffold.
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Affiliation(s)
- Yosuke Kawabuchi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan
| | - Takuma Suzuki
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan
| | - Yoshimasa Wada
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan
| | - Yusuke Sunada
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan
- JST PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, Japan
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Kinoshita-Terauchi N, Shiba K, Umezawa T, Inaba K. Distinct regulation of two flagella by calcium during chemotaxis of male gametes in the brown alga Mutimo cylindricus (Cutleriaceae, Tilopteridales). J Phycol 2024; 60:409-417. [PMID: 38159028 DOI: 10.1111/jpy.13422] [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] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 12/04/2023] [Accepted: 12/06/2023] [Indexed: 01/03/2024]
Abstract
Brown algal male gametes show chemotaxis to the sex pheromone that is released from female gametes. The chemotactic behavior of the male gametes is controlled by the changes in the beating of two flagella known as the anterior and posterior flagellum. Our previous study using Mutimo cylindricus showed that the sex pheromone induced an increment in both the deflection angle of the anterior flagellum and sustained unilateral bend of the posterior flagellum, but the mechanisms regulating these two flagellar waveforms were not fully revealed. In this study, we analyzed the changes in swimming path and flagellar waveforms with a high-speed recording system under different calcium conditions. The extracellular Ca2+ concentration at 10-3 M caused an increment in the deflection angle of the anterior flagellum only when ionomycin was absent. No sustained unilateral bend of the posterior flagellum was induced either in the absence or presence of ionomycin in extracellular Ca2+ concentrations below 10-2 M. Real-time Ca2+ imaging revealed that there is a spot near the basal part of anterior flagellum showing higher Ca2+ than in the other parts of the cell. The intensity of the spot slightly decreased when male gametes were treated with the sex pheromone. These results suggest that Ca2+-dependent changes in the anterior and posterior flagellum are regulated by distinct mechanisms and that the increase in the anterior flagellar deflection angle and sustained unilateral bend of the posterior flagellum may not be primarily induced by the Ca2+ concentration.
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Affiliation(s)
| | - Kogiku Shiba
- Shimoda Marine Research Center, University of Tsukuba, Shizuoka, Japan
| | - Taiki Umezawa
- Graduate School of Environmental Science, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Kazuo Inaba
- Shimoda Marine Research Center, University of Tsukuba, Shizuoka, Japan
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Iwasaki Y, Ohbe H, Yamauchi M, Yasunaga H. In Response. Anesth Analg 2024; 138:e18-e19. [PMID: 38489803 DOI: 10.1213/ane.0000000000006914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2024]
Affiliation(s)
- Yudai Iwasaki
- Department of Anesthesiology and Perioperative Medicine, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Hiroyuki Ohbe
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan,
| | - Masanori Yamauchi
- Department of Anesthesiology and Perioperative Medicine, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Hideo Yasunaga
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan
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Okada A, Kaneko H, Konishi M, Kamiya K, Sugimoto T, Matsuoka S, Yokota I, Suzuki Y, Yamaguchi S, Itoh H, Fujiu K, Michihata N, Jo T, Matsui H, Fushimi K, Takeda N, Morita H, Yasunaga H, Komuro I. A machine-learning-based prediction of non-home discharge among acute heart failure patients. Clin Res Cardiol 2024; 113:522-532. [PMID: 37131097 PMCID: PMC10955024 DOI: 10.1007/s00392-023-02209-0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 04/17/2023] [Indexed: 05/04/2023]
Abstract
BACKGROUND Scarce data on factors related to discharge disposition in patients hospitalized for acute heart failure (AHF) were available, and we sought to develop a parsimonious and simple predictive model for non-home discharge via machine learning. METHODS This observational cohort study using a Japanese national database included 128,068 patients admitted from home for AHF between April 2014 and March 2018. The candidate predictors for non-home discharge were patient demographics, comorbidities, and treatment performed within 2 days after hospital admission. We used 80% of the population to develop a model using all 26 candidate variables and using the variable selected by 1 standard-error rule of Lasso regression, which enhances interpretability, and 20% to validate the predictive ability. RESULTS We analyzed 128,068 patients, and 22,330 patients were not discharged to home; 7,879 underwent in-hospital death and 14,451 were transferred to other facilities. The machine-learning-based model consisted of 11 predictors, showing a discrimination ability comparable to that using all the 26 variables (c-statistic: 0.760 [95% confidence interval, 0.752-0.767] vs. 0.761 [95% confidence interval, 0.753-0.769]). The common 1SE-selected variables identified throughout all analyses were low scores in activities of daily living, advanced age, absence of hypertension, impaired consciousness, failure to initiate enteral alimentation within 2 days and low body weight. CONCLUSIONS The developed machine learning model using 11 predictors had a good predictive ability to identify patients at high risk for non-home discharge. Our findings would contribute to the effective care coordination in this era when HF is rapidly increasing in prevalence.
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Affiliation(s)
- Akira Okada
- Department of Prevention of Diabetes and Lifestyle-Related Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hidehiro Kaneko
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan.
- The Department of Advanced Cardiology, The University of Tokyo, Tokyo, Japan.
| | - Masaaki Konishi
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
| | - Kentaro Kamiya
- Department of Rehabilitation, School of Allied Health Sciences, Kitasato University, Kanagawa, Japan
| | - Tadafumi Sugimoto
- Department of Cardiology and Nephrology, Mie University Graduate School of Medicine, Tsu, Japan
| | - Satoshi Matsuoka
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
| | - Isao Yokota
- Department of Biostatistics, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Yuta Suzuki
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
- Center for Outcomes Research and Economic Evaluation for Health, National Institute of Public Health, Saitama, Japan
| | - Satoko Yamaguchi
- Department of Prevention of Diabetes and Lifestyle-Related Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hidetaka Itoh
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
| | - Katsuhito Fujiu
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
- The Department of Advanced Cardiology, The University of Tokyo, Tokyo, Japan
| | - Nobuaki Michihata
- The Department of Health Services Research, The University of Tokyo, Tokyo, Japan
| | - Taisuke Jo
- The Department of Health Services Research, The University of Tokyo, Tokyo, Japan
| | - Hiroki Matsui
- Department of Clinical Epidemiology and Health Economics, The University of Tokyo, Tokyo, Japan
| | - Kiyohide Fushimi
- Department of Health Policy and Informatics, Tokyo Medical and Dental University, Tokyo, Japan
| | - Norifumi Takeda
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
| | - Hiroyuki Morita
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
| | - Hideo Yasunaga
- Department of Clinical Epidemiology and Health Economics, The University of Tokyo, Tokyo, Japan
| | - Issei Komuro
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
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Yano Y, Sato I, Imanishi T, Yoshida R, Matsuura T, Ueda Y, Kodama Y. Clinical Significance and Remaining Issues of Anti-HBc Antibody and HBV Core-Related Antigen. Diagnostics (Basel) 2024; 14:728. [PMID: 38611641 PMCID: PMC11011781 DOI: 10.3390/diagnostics14070728] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 03/17/2024] [Accepted: 03/26/2024] [Indexed: 04/14/2024] Open
Abstract
Currently, hepatitis B virus (HBV) core antibody (anti-HBc antibody) and HBV core-related antigen (HBcrAg) are widely used as serum markers for diagnosis based on the HBV core region. This review focused on anti-HBc antibodies and HBcrAg and aimed to summarize the clinical significance of currently used assay systems and the issues involved. While anti-HBc is very significant for clinical diagnosis, the clinical significance of quantitative assay of anti-HBc antibody has been reevaluated with improvements in diagnostic performance, including its association with clinical stage and prediction of carcinogenesis and reactivation. In addition, concerning the new HBcrAg, a high-sensitivity assay method has recently been established, and its diagnostic significance, including the prediction of reactivation, is being reevaluated. On the other hand, the quantitative level of anti-HBc antibody expressed in different units among assay systems complicates the interpretation of the results. However, it is difficult to standardize assay systems as they vary in advantages, and caution is needed in interpreting the assay results. In conclusion, with the development of highly sensitive HBcrAg and anti-HBc antibody, a rapid and sensitive detection assay system has been developed and used in clinical practice. In the future, it is hoped that a global standard will be created based on the many clinical findings.
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Affiliation(s)
- Yoshihiko Yano
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan; (R.Y.); (T.M.); (Y.U.); (Y.K.)
- Department of Clinical Laboratory, Kobe University Hospital, Kobe 650-0017, Japan; (I.S.); (T.I.)
| | - Itsuko Sato
- Department of Clinical Laboratory, Kobe University Hospital, Kobe 650-0017, Japan; (I.S.); (T.I.)
| | - Takamitsu Imanishi
- Department of Clinical Laboratory, Kobe University Hospital, Kobe 650-0017, Japan; (I.S.); (T.I.)
| | - Ryutaro Yoshida
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan; (R.Y.); (T.M.); (Y.U.); (Y.K.)
| | - Takanori Matsuura
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan; (R.Y.); (T.M.); (Y.U.); (Y.K.)
| | - Yoshihide Ueda
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan; (R.Y.); (T.M.); (Y.U.); (Y.K.)
| | - Yuzo Kodama
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan; (R.Y.); (T.M.); (Y.U.); (Y.K.)
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Kamada K, Jung J, Yamada C, Wakabayashi T, Sekizawa K, Sato S, Morikawa T, Fukuzumi S, Saito S. Photocatalytic CO 2 Reduction Using an Osmium Complex as a Panchromatic Self-Photosensitized Catalyst: Utilization of Blue, Green, and Red Light. Angew Chem Int Ed Engl 2024:e202403886. [PMID: 38545689 DOI: 10.1002/anie.202403886] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Indexed: 04/24/2024]
Abstract
The photocatalytic reduction of carbon dioxide (CO2) represents an attractive approach for solar-energy storage and leads to the production of renewable fuels and valuable chemicals. Although some osmium (Os) photosensitizers absorb long wavelengths in the visible-light region, a self-photosensitized, mononuclear Os catalyst for red-light-driven CO2 reduction has not yet been exploited. Here, we discovered that the introduction of an Os metal to a PNNP-type tetradentate ligand resulted in the absorption of light with longer-wavelength (350-700 nm) and that can be applied to a panchromatic self-photosensitized catalyst for CO2 reduction to give mainly carbon monoxide (CO) with a total turnover number (TON) of 625 under photoirradiation (λ≥400 nm). CO2 photoreduction also proceeded under irradiation with blue (λ0=405 nm), green (λ0=525 nm), or red (λ0=630 nm) light to give CO with >90 % selectivity. The quantum efficiency using red light was determined to be 12 % for the generation of CO. A catalytic mechanism is proposed based on the detection of intermediates using various spectroscopic techniques, including transient absorption, electron paramagnetic resonance, and UV/Vis spectroscopy.
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Affiliation(s)
- Kenji Kamada
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo, Chikusa, 464-8602, Nagoya, Japan
| | - Jieun Jung
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo, Chikusa, 464-8602, Nagoya, Japan
| | - Chihiro Yamada
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo, Chikusa, 464-8602, Nagoya, Japan
| | - Taku Wakabayashi
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo, Chikusa, 464-8602, Nagoya, Japan
| | - Keita Sekizawa
- Toyota Central Research and Development Laboratories, Inc., 480-1192, Nagakute, Japan
| | - Shunsuke Sato
- Toyota Central Research and Development Laboratories, Inc., 480-1192, Nagakute, Japan
| | - Takeshi Morikawa
- Toyota Central Research and Development Laboratories, Inc., 480-1192, Nagakute, Japan
| | - Shunichi Fukuzumi
- Department of Chemistry, Faculty of Pure and Applied Science, University of Tsukuba, 1-1-1 Tennoudai, 305-8571, Tsukuba, Ibaraki, Japan
| | - Susumu Saito
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo, Chikusa, 464-8602, Nagoya, Japan
- Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, 464-8602, Nagoya, Japan
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Suzuki Y, Kaneko H, Nagasawa H, Okada A, Fujiu K, Jo T, Takeda N, Morita H, Nishiyama A, Gohda T, Suzuki Y, Node K, Yasunaga H, Nangaku M, Komuro I. Comparison of estimated glomerular filtration rate change with sodium-glucose cotransporter-2 inhibitors versus glucagon-like peptide-1 receptor agonists among people with diabetes: A propensity-score matching study. Diabetes Obes Metab 2024. [PMID: 38528820 DOI: 10.1111/dom.15561] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 02/22/2024] [Accepted: 03/05/2024] [Indexed: 03/27/2024]
Abstract
AIM To compare the risk of developing kidney outcomes with use of glucagon-like peptide-1 receptor agonists (GLP-1RAs) versus use of sodium-glucose cotransporter-2 (SGLT2) inhibitors among individuals with diabetes. MATERIALS AND METHODS In this retrospective observational study, we analysed 12 338 individuals with diabetes who newly initiated SGLT2 inhibitors or GLP-1RAs using data from the JMDC claims database. The primary outcome was change in the estimated glomerular filtration rate (eGFR), estimated using a linear mixed-effects model. A 1:4 propensity-score-matching algorithm was used to compare the changes in eGFR between GLP-1RA and SGLT2 inhibitor users. RESULTS After propensity-score matching, 2549 individuals (median [range] age 52 [46-58] years, 80.6% men) were analysed (510 GLP-1RA new users and 2039 SGLT2 inhibitor new users). SGLT2 inhibitor use was associated with a slower eGFR decline when compared with GLP-1RA use (-1.41 [95% confidence interval -1.63 to -1.19] mL/min/1.73 m2 vs. -2.62 [95% confidence interval -3.15 to -2.10] mL/min/1.73 m2). CONCLUSIONS Our analysis demonstrates the potential advantages of SGLT2 inhibitors over GLP-1RAs in terms of kidney outcomes in individuals with diabetes.
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Grants
- 21AA2007 the Ministry of Health, Labour and Welfare
- 20H03907 Ministry of Education, Culture, Sports, Science and Technology, Japan
- 21H03159 Ministry of Education, Culture, Sports, Science and Technology, Japan
- 21K08123 Ministry of Education, Culture, Sports, Science and Technology, Japan
- 22K21133 Ministry of Education, Culture, Sports, Science and Technology, Japan
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Affiliation(s)
- Yuta Suzuki
- The Department of Cardiovascular Medicine, The University of Tokyo, Tokyo, Japan
- Center for Outcomes Research and Economic Evaluation for Health, National Institute of Public Health, Saitama, Japan
| | - Hidehiro Kaneko
- The Department of Cardiovascular Medicine, The University of Tokyo, Tokyo, Japan
- The Department of Advanced Cardiology, The University of Tokyo, Tokyo, Japan
| | - Hajime Nagasawa
- The Department of Cardiovascular Medicine, The University of Tokyo, Tokyo, Japan
- Department of Nephrology, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Akira Okada
- Department of Prevention of Diabetes and Lifestyle-Related Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Katsuhito Fujiu
- The Department of Cardiovascular Medicine, The University of Tokyo, Tokyo, Japan
- The Department of Advanced Cardiology, The University of Tokyo, Tokyo, Japan
| | - Taisuke Jo
- Department of Health Services Research, The University of Tokyo, Tokyo, Japan
| | - Norifumi Takeda
- The Department of Cardiovascular Medicine, The University of Tokyo, Tokyo, Japan
| | - Hiroyuki Morita
- The Department of Cardiovascular Medicine, The University of Tokyo, Tokyo, Japan
| | - Akira Nishiyama
- Department of Pharmacology, Faculty of Medicine, Kagawa University, Takamatsu, Japan
| | - Tomohito Gohda
- Department of Nephrology, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Yusuke Suzuki
- Department of Nephrology, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Koichi Node
- Department of Cardiovascular Medicine, Saga University, Saga, Japan
| | - Hideo Yasunaga
- The Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan
| | - Masaomi Nangaku
- Division of Nephrology and Endocrinology, The University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Issei Komuro
- The Department of Cardiovascular Medicine, The University of Tokyo, Tokyo, Japan
- International University of Health and Welfare, Tokyo, Japan
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9
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Ueno K, Kaneko H, Suzuki Y, Okada A, Matsuoka S, Fujiu K, Michihata N, Jo T, Takeda N, Morita H, Kamiya K, Ako J, Node K, Yasunaga H, Komuro I. Metabolic syndrome and cardiovascular disease in cancer survivors. J Cachexia Sarcopenia Muscle 2024. [PMID: 38515400 DOI: 10.1002/jcsm.13443] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 08/01/2023] [Accepted: 01/29/2024] [Indexed: 03/23/2024] Open
Abstract
BACKGROUND The risk of subsequent cardiovascular disease (CVD) is high in cancer survivors. Although metabolic syndrome is an established risk factor for CVD, its association with cancer survivors has not yet been established. This study aimed to clarify whether metabolic syndrome is associated with subsequent CVD risk in patients with cancer using a nationwide epidemiological dataset. METHODS We retrospectively analysed 53 510 patients with a history of breast, colorectal, or stomach cancer, which is reportedly a major site for developing cancer in Japan. Study participants were categorized into two groups based on the presence of metabolic syndrome, defined using the Japanese criteria (high waist circumference and ≥2 metabolic parameters including elevated blood pressure, elevated triglycerides, reduced high-density lipoprotein cholesterol, or elevated fasting plasma glucose). The clinical outcomes were collected between 2005 and 2021. The primary endpoint was defined as the composite CVD outcome, including myocardial infarction, angina pectoris, stroke, and heart failure. RESULTS The median patient age was 54 years, and 37.5% of the patients were men. Metabolic syndrome was observed in 5558 (10.4%) patients. Over a mean follow-up period of 973 ± 791 days, 3085 composite CVD outcomes were recorded. Multivariable Cox regression analyses showed that metabolic syndrome was associated with a greater risk of developing CVD events (HR = 1.29, 95% CI = 1.15-1.45). Metabolic syndrome was also associated with an increased risk of CVD in patients with a follow-up period ≥1 year (HR = 1.33, 95% CI = 1.15-1.53). This relationship was also observed when metabolic syndrome was defined according to the International Diabetes Federation criteria (HR = 1.34, 95% CI = 1.21-1.49) and the National Cholesterol Education Program Adult Treatment Panel III criteria (HR = 1.32, 95% CI = 1.19-1.46). Subgroup analyses showed that the relationship between metabolic syndrome and incident CVD was more pronounced in the non-obese participants than in the obese participants. CONCLUSIONS Metabolic syndrome is associated with a greater risk of developing CVD, even among cancer survivors.
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Grants
- 21AA2007 Ministry of Health, Labour and Welfare, Japan
- 21K08123 Ministry of Education, Culture, Sports, Science and Technology, Japan
- 21H03159 Ministry of Education, Culture, Sports, Science and Technology, Japan
- 20H03907 Ministry of Education, Culture, Sports, Science and Technology, Japan
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Affiliation(s)
- Kensuke Ueno
- Department of Cardiovascular Medicine, University of Tokyo, Tokyo, Japan
- Department of Rehabilitation Sciences, Graduate School of Medical Sciences, Kitasato University, Kanagawa, Japan
| | - Hidehiro Kaneko
- Department of Cardiovascular Medicine, University of Tokyo, Tokyo, Japan
- Department of Advanced Cardiology, University of Tokyo, Tokyo, Japan
| | - Yuta Suzuki
- Department of Cardiovascular Medicine, University of Tokyo, Tokyo, Japan
| | - Akira Okada
- Department of Prevention of Diabetes and Lifestyle-Related Diseases, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Satoshi Matsuoka
- Department of Cardiovascular Medicine, University of Tokyo, Tokyo, Japan
| | - Katsuhito Fujiu
- Department of Cardiovascular Medicine, University of Tokyo, Tokyo, Japan
- Department of Advanced Cardiology, University of Tokyo, Tokyo, Japan
| | - Nobuaki Michihata
- Department of Health Services Research, University of Tokyo, Tokyo, Japan
| | - Taisuke Jo
- Department of Health Services Research, University of Tokyo, Tokyo, Japan
| | - Norifumi Takeda
- Department of Cardiovascular Medicine, University of Tokyo, Tokyo, Japan
| | - Hiroyuki Morita
- Department of Cardiovascular Medicine, University of Tokyo, Tokyo, Japan
| | - Kentaro Kamiya
- Department of Rehabilitation, School of Allied Health Sciences, Kitasato University, Kanagawa, Japan
| | - Junya Ako
- Department of Cardiovascular Medicine, School of Medicine, Kitasato University, Kanagawa, Japan
| | - Koichi Node
- Department of Cardiovascular Medicine, Saga University, Saga, Japan
| | - Hideo Yasunaga
- Department of Clinical Epidemiology and Health Economics, School of Public Health, University of Tokyo, Tokyo, Japan
| | - Issei Komuro
- Department of Cardiovascular Medicine, University of Tokyo, Tokyo, Japan
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10
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Mori T, Abe I. Lincosamide Antibiotics: Structure, Activity, and Biosynthesis. Chembiochem 2024; 25:e202300840. [PMID: 38165257 DOI: 10.1002/cbic.202300840] [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: 12/12/2023] [Revised: 12/29/2023] [Accepted: 01/02/2024] [Indexed: 01/03/2024]
Abstract
Lincosamides are naturally occurring antibiotics isolated from Streptomyces sp. Currently, lincomycin A and its semisynthetic analogue clindamycin are used as clinical drugs. Due to their unique structures and remarkable biological activities, derivatizations of lincosamides via semi-synthesis and biosynthetic studies have been reported. This review summarizes the structures and biological activities of lincosamides, and the recent studies of lincosamide biosynthetic enzymes.
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Grants
- JP20H00490 Ministry of Education, Culture, Sports, Science and Technology, Japan
- JP22H05126 Ministry of Education, Culture, Sports, Science and Technology, Japan
- JP23H00393 Ministry of Education, Culture, Sports, Science and Technology, Japan
- JP23H02641 Ministry of Education, Culture, Sports, Science and Technology, Japan
- JPNP20011 New Energy and Industrial Technology Development Organization
- JP21ak0101164 New Energy and Industrial Technology Development Organization
- JP23ama121027 New Energy and Industrial Technology Development Organization
- JPMJPR20DA Japan Science and Technology Agency
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Affiliation(s)
- Takahiro Mori
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
- PRESTO, Japan Science and Technology Agency, 4-1-8, Honcho, Kawaguchi, Saitama, 332-0012, Japan
| | - Ikuro Abe
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
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11
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Hashimoto R, Minoshima M, Kikuchi K. Rational Design of Hydroxylated Thiazole Orange Photocages for Green Light-Triggered DNA Recombination. Chembiochem 2024; 25:e202300799. [PMID: 38153201 DOI: 10.1002/cbic.202300799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Revised: 12/24/2023] [Accepted: 12/28/2023] [Indexed: 12/29/2023]
Abstract
The precise control of DNA recombination enables the cell- or time-dependent regulation of gene expression in studies of gene function. Caged estrogen receptor ligands combined with a Cre-ERT2/loxP system are useful tools for light-triggered DNA recombination. However, the photolysis of most caged compounds requires ultraviolet or blue light, which is toxic and displays low tissue penetration. Although a cyanine-based photo-responsive protecting group (PPG) can release estrogen receptor ligands with longer-wavelength light, its low photolytic efficiency requires long illumination times. We developed a caged estrogen receptor ligand with improved green light-responsive PPGs. The rational modification of Hydroxylated Thiazole Orange (HTO) photocages using electron-donating groups (EDGs), such as dimethoxy (DiMeO)-substituted HTO, resulted in high photolytic efficiency (up to ϵΦ ≈320 M-1 cm-1 ). Theoretical calculations demonstrated that the enhanced photolytic efficiencies were derived from the increased intramolecular charge transfer by EDGs upon excitation. The efficient uncaging of estrogen receptor ligands enabled the control of gene recombination in a ligand-dependent Cre-ERT2/loxP system in live cells.
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Affiliation(s)
- Ryu Hashimoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Masafumi Minoshima
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
- JST, PRESTO, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Kazuya Kikuchi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
- Immunology Frontier Research Center, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
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12
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Nozuma S, Yoshimura A, Pai SC, Chen HJ, Matsuura E, Tanaka M, Kodama D, Dozono M, Matsuzaki T, Takashima H, Yang YC, Kubota R. Geographic characteristics of HTLV-1 molecular subgroups and genetic substitutions in East Asia: Insights from complete genome sequencing of HTLV-1 strains isolated in Taiwan and Japan. PLoS Negl Trop Dis 2024; 18:e0011928. [PMID: 38315729 PMCID: PMC10868808 DOI: 10.1371/journal.pntd.0011928] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 02/15/2024] [Accepted: 01/21/2024] [Indexed: 02/07/2024] Open
Abstract
BACKGROUND Although Japan is a major endemic area for human T-lymphotropic virus type 1 (HTLV-1) and the virus has been well-studied in this region, there is limited research on HTLV-1 in surrounding regions. In this study, we determined the complete genome sequences of HTLV-1 strains isolated from Taiwan and Japan and investigated the geographic characteristics of molecular subgroups and substitution mutations to understand the spread of HTLV-1 and its correlation with human migration. METHODOLOGY/PRINCIPAL FINDINGS The complete genome sequences of 26 HTLV-1 isolates from Taiwan were determined using next-generation sequencing and were compared with those of 211 isolates from Japan in terms of subgroup and genetic mutations. In total, 15/26 (58%) isolates from Taiwan belonged to the transcontinental subgroup and 11/26 (42%) isolates belonged to the Japanese subgroup. The transcontinental subgroup was significantly more prevalent among Taiwanese isolates than Japanese isolates (58% vs 18%, P < 0.0001). The mutation rate for the complete HTLV-1 sequence was as low as 0.2%. On examining individual base substitutions, the G-to-A mutation was predominant. Bayesian phylogenetic tree analysis estimated the time to the most recent common ancestor for the transcontinental and Japanese subgroups to be 28447 years. The transcontinental subgroups from Taiwan and Japan appeared to form clusters according to their respective regions. CONCLUSIONS/SIGNIFICANCE The transcontinental subgroup of HTLV-1 is predominant in Taiwan, while the Japanese subgroup is common in Japan. The difference in subgroup distribution may be attributed to the initial spread of the transcontinental subgroup in East Asia, followed by the influx of the Japanese subgroup.
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Affiliation(s)
- Satoshi Nozuma
- Department of Neurology and Geriatrics, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Kagoshima, Japan
| | - Akiko Yoshimura
- Department of Neurology and Geriatrics, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Kagoshima, Japan
| | - Shun-Chung Pai
- Division of Quality, Taipei Blood Center, Taipei, Taiwan
| | - Hung-Jen Chen
- Department of Clinical Laboratory Sciences and Medical Biotechnology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Eiji Matsuura
- Department of Neurology and Geriatrics, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Kagoshima, Japan
| | - Masakazu Tanaka
- Division of Neuroimmunology, Joint Research Center for Human Retrovirus Infection, Kagoshima University, Kagoshima, Japan
| | - Daisuke Kodama
- Division of Neuroimmunology, Joint Research Center for Human Retrovirus Infection, Kagoshima University, Kagoshima, Japan
| | - Mika Dozono
- Department of Neurology and Geriatrics, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Kagoshima, Japan
| | - Toshio Matsuzaki
- Division of Neuroimmunology, Joint Research Center for Human Retrovirus Infection, Kagoshima University, Kagoshima, Japan
| | - Hiroshi Takashima
- Department of Neurology and Geriatrics, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Kagoshima, Japan
| | - Ya-Chien Yang
- Department of Clinical Laboratory Sciences and Medical Biotechnology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Ryuji Kubota
- Division of Neuroimmunology, Joint Research Center for Human Retrovirus Infection, Kagoshima University, Kagoshima, Japan
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Lee JY, Yoshida M, Satoh M, Watanabe C. Neurobehavioral effects of the exposure to mercury vapor and methylmercury during postnatal period on mice. Toxicol Res 2024; 40:111-124. [PMID: 38223668 PMCID: PMC10786797 DOI: 10.1007/s43188-023-00210-3] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 07/30/2023] [Accepted: 08/24/2023] [Indexed: 01/16/2024] Open
Abstract
In this study, we investigated the neurobehavioral alterations and modifications of gene expression in the brains of female mice exposed to low-level mercury vapor and/or methylmercury during postnatal development. The mice were exposed to low-level mercury vapor at a mean concentration of 0.094 mg/m3 and supplied with tap water containing 5 ppm methylmercury from postnatal day 11 to 12 weeks of age. Behavioral analyses were performed at 17 weeks of age. Total locomotor activity in the open field test and the retention trial performance in the passive avoidance test were significantly reduced in the combined exposure group compared with those in the control group. The differences in locomotor activity and performance in the retention trial at 17 weeks were no longer detected at 45 weeks. These results suggest that the effect of aging on the behavioral abnormalities resulting from postnatal exposure to mercury complexes are not significant. In the microarray analysis of brains in the combined exposure group, the gene expression levels of Ano2 and Sgk1 were decreased. Real-time RT-PCR analysis confirmed these changes caused by combined mercury exposure, showing significant downregulation of Ano2 and Sgk1 in the cerebrum. These genes play key roles in the brain as a calcium-activated chloride channel and as a kinase that responds to cellular stress, respectively. Our findings provide insight into the neurobehavioral changes caused by combined mercury exposure.
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Affiliation(s)
- Jin-Yong Lee
- Laboratory of Pharmaceutical Health Sciences, School of Pharmacy, Aichi Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, 464-8650 Japan
| | - Minoru Yoshida
- Department of Nursing, Tokyo Junshin University, 2-600 Takiyama-machi, Hachioji, Tokyo, 192-0011 Japan
| | - Masahiko Satoh
- Laboratory of Pharmaceutical Health Sciences, School of Pharmacy, Aichi Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, 464-8650 Japan
| | - Chiho Watanabe
- Interfaculty Initiative in Planetary Health, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, 852-8523 Japan
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14
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Suzuki Y, Suzuki T, Miura F, Reyes JIL, Asin ICA, Mitsunari W, Uddin MM, Sekii Y, Watanabe K. No detectable fitness cost of infection by cell-fusing agent virus in Aedes aegypti mosquitoes. R Soc Open Sci 2024; 11:231373. [PMID: 38204783 PMCID: PMC10776230 DOI: 10.1098/rsos.231373] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 12/06/2023] [Indexed: 01/12/2024]
Abstract
Aedes mosquitoes are well-known vectors of arthropod-borne viruses (arboviruses). Mosquitoes are more frequently infected with insect-specific viruses (ISVs) that cannot infect vertebrates. Some ISVs interfere with arbovirus replication in mosquito vectors, which has gained attention for potential use against arbovirus transmission. Cell-fusing agent virus (CFAV), a widespread ISV, can reduce arbovirus dissemination in Ae. aegypti. However, vectorial capacity is largely governed by other parameters than pathogen load, including mosquito survival and biting behaviour. Understanding how ISVs impact these mosquito fitness-related traits is critical to assess the potential risk of using ISVs as biological agents. Here, we examined the effects of CFAV infection on Ae. aegypti mosquito fitness. We found no significant reduction in mosquito survival, blood-feeding behaviour and reproduction, suggesting that Ae. aegypti is tolerant to CFAV. The only detectable effect was a slight increase in human attraction of CFAV-infected females in one out of eight trials. Viral tolerance is beneficial for introducing CFAV into natural mosquito populations, whereas the potential increase in biting activity must be further investigated. Our results provide the first insight into the link between ISVs and Aedes mosquito fitness and highlight the importance of considering all aspects of vectorial capacity for arbovirus control using ISVs.
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Affiliation(s)
- Yasutsugu Suzuki
- Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 3, Matsuyama, Ehime, Japan
| | - Takahiro Suzuki
- Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 3, Matsuyama, Ehime, Japan
- Graduate School of Science and Engineering, Ehime University, Bunkyo-cho 3, Matsuyama, Ehime, Japan
| | - Fuminari Miura
- Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 3, Matsuyama, Ehime, Japan
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - Jerica Isabel L. Reyes
- Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 3, Matsuyama, Ehime, Japan
- Graduate School of Science and Engineering, Ehime University, Bunkyo-cho 3, Matsuyama, Ehime, Japan
| | - Irish Coleen A. Asin
- Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 3, Matsuyama, Ehime, Japan
- Graduate School of Science and Engineering, Ehime University, Bunkyo-cho 3, Matsuyama, Ehime, Japan
| | - Wataru Mitsunari
- Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 3, Matsuyama, Ehime, Japan
- Faculty of Engineering, Ehime University, Bunkyo-cho 3, Matsuyama, Ehime, Japan
| | - Mohammad Mosleh Uddin
- Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 3, Matsuyama, Ehime, Japan
- Graduate School of Science and Engineering, Ehime University, Bunkyo-cho 3, Matsuyama, Ehime, Japan
- Department of Biochemistry and Molecular Biology (BMB), Faculty of Life Science, Mawlana Bhashani Science and Technology University (MBSTU), Santosh, Tangail, Bangladesh
| | - Yu Sekii
- Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 3, Matsuyama, Ehime, Japan
| | - Kozo Watanabe
- Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 3, Matsuyama, Ehime, Japan
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Do KM, Nakashima Y, Kodama T, Lee YE, Nguyen HM, Ikumi N, Morita H. Phenolic Derivatives with Anti-Acetylcholinesterase Inhibitory Activities from Galeola nudifolia in Vietnam. Chem Biodivers 2023; 20:e202301482. [PMID: 37899310 DOI: 10.1002/cbdv.202301482] [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: 09/21/2023] [Revised: 10/16/2023] [Accepted: 10/26/2023] [Indexed: 10/31/2023]
Abstract
A new phenolic derivative, galeomalate A (1), together with five known structurally related compounds (2-6), was isolated from the ethyl acetate extract of Galeola nudifolia collected in Vietnam. The structures were elucidated by various spectroscopic methods, including 1D and 2D NMR, HR-ESI-TOF-MS, and CD data, and chemical conversion of the sugar moiety. All isolated compounds possessed acetylcholinesterase (AChE) inhibitory activities in a dose-dependent manner. Among them, compounds 2 and 3 exhibited the first and second highest inhibitory activity on AChE with IC50 values of 122.13 and 125.49 μM, respectively. Compounds 1 and 4-6 inhibited the AChE activity by mixed modes of action comprising competitive and non-competitive modes, whereas 2 and 3 exerted their inhibitory activities in a competitive manner. Molecular docking analyses suggested that the phenyl-β-D-glucopyranoside unit of 2 and 3 bound to the active site of AChE for the competitive inhibitory activities, while the mixed inhibitory activity of 4 was due to the two binding patterns in the active-site and the active-site entrance of AChE. Furthermore, the docking studies indicated that 1, 5, and 6 would inhibit AChE in a mixed inhibitory manner by adopting three distinct binding patterns of the additional phenyl-β-D-glucopyranoside unit at the active-site entrance.
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Grants
- 22H02777 Ministry of Education, Culture, Sports, Science and Technology, Japan
- 23K06179 Ministry of Education, Culture, Sports, Science and Technology, Japan
- JP22K15303 Ministry of Education, Culture, Sports, Science and Technology, Japan
- Japan Preventive Medical Laboratory Company, Ltd.
- 2023 Director Leadership Expenses, Institute of Natural Medicine, University of Toyama
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Affiliation(s)
- Kiep Minh Do
- Institute of Natural Medicine, University of Toyama, 2630-Sugitani, Toyama, 930-0194, Japan
| | - Yu Nakashima
- Institute of Natural Medicine, University of Toyama, 2630-Sugitani, Toyama, 930-0194, Japan
| | - Takeshi Kodama
- Institute of Natural Medicine, University of Toyama, 2630-Sugitani, Toyama, 930-0194, Japan
| | - Yuan-E Lee
- Institute of Natural Medicine, University of Toyama, 2630-Sugitani, Toyama, 930-0194, Japan
| | - Hien Minh Nguyen
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, 700000, Vietnam
| | - Naotaka Ikumi
- Japan Preventive Medical Laboratory Company, Ltd., 3-6-36, Toyoda, Suruga-ku, Shizuoka, 422-8027, Japan
| | - Hiroyuki Morita
- Institute of Natural Medicine, University of Toyama, 2630-Sugitani, Toyama, 930-0194, Japan
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16
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Hattori Y, Tahara S, Aso S, Makito K, Matsui H, Fushimi K, Yasunaga H, Morita A. Comparison of prophylactic antibiotics for endonasal transsphenoidal surgery using a national inpatient database in Japan. J Antimicrob Chemother 2023; 78:2909-2914. [PMID: 37856687 DOI: 10.1093/jac/dkad329] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 10/04/2023] [Indexed: 10/21/2023] Open
Abstract
BACKGROUND The choice of prophylactic antibiotics for use in endonasal transsphenoidal surgery (ETSS) lacks universal standards. This study aimed to investigate the effectiveness of cefazolin, ampicillin and third-generation cephalosporins for preventing postoperative meningitis and secondary outcomes (in-hospital death and the combination of pneumonia and urinary tract infection) in patients who have undergone ETSS. METHODS The study used data from the Diagnosis Procedure Combination database in Japan. Data from 10 688 patients who underwent ETSS between April 2016 and March 2021 were included. Matching weight analysis based on propensity scores was conducted to compare the outcomes of patients receiving cefazolin, ampicillin or third-generation cephalosporins as prophylactic antibiotics. RESULTS Of the 10 688 patients, 9013, 102 and 1573 received cefazolin, ampicillin and third-generation cephalosporins, respectively. The incidence of postoperative meningitis did not significantly differ between the cefazolin group and the ampicillin group (OR, 1.02; 95% CI, 0.14-7.43) or third-generation cephalosporins group (OR, 0.81; 95% CI, 0.10-6.44). Similarly, in-hospital death and the composite incidence of pneumonia and urinary tract infection did not differ between the cefazolin group and the ampicillin or third-generation cephalosporins group. CONCLUSIONS Cefazolin, ampicillin and third-generation cephalosporins as perioperative prophylactic antibiotics for ETSS do not differ significantly in terms of preventing meningitis.
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Affiliation(s)
- Yujiro Hattori
- Department of Neurological Surgery, Graduate School of Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan
- Department of Anatomy and Neurobiology, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Shigeyuki Tahara
- Department of Neurological Surgery, Graduate School of Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan
| | - Shotaro Aso
- Department of Real World Evidence, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kanako Makito
- Department of Biostatistics and Bioinformatics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hiroki Matsui
- Department of Biostatistics and Bioinformatics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kiyohide Fushimi
- Department of Health Policy and Informatics, Tokyo Medical and Dental University Graduate School of Medicine, Tokyo, Japan
| | - Hideo Yasunaga
- Department of Biostatistics and Bioinformatics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Akio Morita
- Department of Neurological Surgery, Graduate School of Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan
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Tabei Y, Abe H, Suzuki S, Takeda N, Arai JI, Nakajima Y. Sedanolide Activates KEAP1-NRF2 Pathway and Ameliorates Hydrogen Peroxide-Induced Apoptotic Cell Death. Int J Mol Sci 2023; 24:16532. [PMID: 38003720 PMCID: PMC10671709 DOI: 10.3390/ijms242216532] [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: 10/19/2023] [Revised: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 11/26/2023] Open
Abstract
Sedanolide is a bioactive compound with anti-inflammatory and antitumor activities. Although it has been recently suggested that sedanolide activates the nuclear factor E2-related factor 2 (NRF2) pathway, there is little research on its effects on cellular resistance to oxidative stress. The objective of the present study was to investigate the function of sedanolide in suppressing hydrogen peroxide (H2O2)-induced oxidative damage and the underlying molecular mechanisms in human hepatoblastoma cell line HepG2 cells. We found that sedanolide activated the antioxidant response element (ARE)-dependent transcription mediated by the nuclear translocation of NRF2. Pathway enrichment analysis of RNA sequencing data revealed that sedanolide upregulated the transcription of antioxidant enzymes involved in the NRF2 pathway and glutathione metabolism. Then, we further investigated whether sedanolide exerts cytoprotective effects against H2O2-induced cell death. We showed that sedanolide significantly attenuated cytosolic and mitochondrial reactive oxygen species (ROS) generation induced by exposure to H2O2. Furthermore, we demonstrated that pretreatment with sedanolide conferred a significant cytoprotective effect against H2O2-induced cell death probably due to preventing the decrease in the mitochondrial membrane potential and the increase in caspase-3/7 activity. Our study demonstrated that sedanolide enhanced cellular resistance to oxidative damage via the activation of the Kelch-like ECH-associated protein 1 (KEAP1)-NRF2 pathway.
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Affiliation(s)
- Yosuke Tabei
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu 761-0395, Kagawa, Japan; (Y.T.); (H.A.); (S.S.)
| | - Hiroko Abe
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu 761-0395, Kagawa, Japan; (Y.T.); (H.A.); (S.S.)
| | - Shingo Suzuki
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu 761-0395, Kagawa, Japan; (Y.T.); (H.A.); (S.S.)
- Department of Anatomy and Neurobiology, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho 761-0793, Kagawa, Japan
| | - Nobuaki Takeda
- Technology and Innovation Center, Daikin Industries, Ltd., 1-1 Nishi-Hitotsuya, Settsu 566-8585, Osaka, Japan; (N.T.); (J.-i.A.)
| | - Jun-ichiro Arai
- Technology and Innovation Center, Daikin Industries, Ltd., 1-1 Nishi-Hitotsuya, Settsu 566-8585, Osaka, Japan; (N.T.); (J.-i.A.)
| | - Yoshihiro Nakajima
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu 761-0395, Kagawa, Japan; (Y.T.); (H.A.); (S.S.)
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Fukaya M, Kiriyama S, Yagami S, Iwata R, Yasui H, Tokoro M, Zou Y, Millar JG. Identification of a Male-Produced Aggregation Sex Pheromone in Rosalia batesi, an Endemic Japanese Longhorn Beetle. Insects 2023; 14:867. [PMID: 37999066 PMCID: PMC10671707 DOI: 10.3390/insects14110867] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/07/2023] [Accepted: 11/07/2023] [Indexed: 11/25/2023]
Abstract
The longhorned beetle Rosalia batesi Harold (Coleoptera; Cerambycidae) is endemic to Japan, where its range extends from Hokkaido to Kyushu. The colorful adults are well-known to entomologists and collectors worldwide. It is a hardwood-boring species with larvae that develop in dead broad-leaf trees. In laboratory bioassays, females were attracted to males, which suggested that males produce a sex pheromone. The congeneric species R. alpina is native to Europe, and another congener, R. funebris, is distributed in North America. The pheromone components produced by males of these species had been previously identified as two compounds from different biosynthetic pathways. In the present study, volatiles were collected from beetles of both sexes, and the analyses of the resulting extracts revealed a single male-specific compound, which was identified as 3,5-dimethyl-6-(1-methylbutyl)-pyran-2-one; this is the same compound as the pheromone of the European R. alpina. This alkylated pyrone structure is, so far, unique among known cerambycid pheromones. In field bioassays with traps baited with the racemic synthetic pheromone, significant numbers of both sexes of R. batesi were attracted in an approximately equal ratio, indicating that the compound is an aggregation-sex pheromone rather than a sex pheromone.
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Affiliation(s)
- Midori Fukaya
- Department of Forest Science and Resources, College of Bioresource Sciences, Nihon University, Fujisawa 252-0880, Kanagawa, Japan; (M.F.); (R.I.)
| | - Satoshi Kiriyama
- Department of Forest Science and Resources, College of Bioresource Sciences, Nihon University, Fujisawa 252-0880, Kanagawa, Japan; (M.F.); (R.I.)
| | - Saki Yagami
- Department of Forest Science and Resources, College of Bioresource Sciences, Nihon University, Fujisawa 252-0880, Kanagawa, Japan; (M.F.); (R.I.)
| | - Ryûtarô Iwata
- Department of Forest Science and Resources, College of Bioresource Sciences, Nihon University, Fujisawa 252-0880, Kanagawa, Japan; (M.F.); (R.I.)
| | - Hiroe Yasui
- Institute for Plant Protection, National Agriculture and Food Research Organization, Tsukuba 305-8666, Ibaraki, Japan
| | - Masahiko Tokoro
- Forestry & Forest Products Research Institute, Tsukuba 305-8687, Ibaraki, Japan;
| | - Yunfan Zou
- Departments of Entomology and Chemistry, University of California, Riverside, CA 92506, USA (J.G.M.)
| | - Jocelyn G. Millar
- Departments of Entomology and Chemistry, University of California, Riverside, CA 92506, USA (J.G.M.)
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Watanabe H, Yamana H, Okada A, Matsui H, Fushimi K, Yasunaga H. Therapeutic plasma exchange for anti-glomerular basement membrane disease with dialysis-dependent kidney failure without diffuse alveolar hemorrhage. J Nephrol 2023; 36:2317-2325. [PMID: 37354278 PMCID: PMC10638153 DOI: 10.1007/s40620-023-01695-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 10/16/2022] [Accepted: 05/30/2023] [Indexed: 06/26/2023]
Abstract
BACKGROUND Anti-glomerular basement membrane (anti-GBM) disease is treated with immunosuppressive medications and plasma exchange. However, whether plasma exchange, in addition to pulse glucocorticoid therapy, would benefit patients with anti-GBM disease with dialysis-dependent kidney failure without diffuse alveolar hemorrhage remains unclear. METHODS Using the Japanese Diagnosis Procedure Combination database, we identified patients diagnosed with anti-GBM disease with dialysis-dependent kidney failure and without diffuse alveolar hemorrhage from July 2010 to March 2020. We compared in-hospital mortality within 10 days of hospitalization between patients who received therapeutic plasma exchange in addition to pulse glucocorticoid therapy and those who received pulse glucocorticoid therapy alone. Overlap weighting based on propensity score was performed to adjust for potential confounders. RESULTS We identified 207 eligible patients; 168 patients received therapeutic plasma exchange plus pulse glucocorticoid therapy, while 39 patients received pulse glucocorticoid therapy alone. The mean dose of therapeutic plasma exchange was 52.2 ml/kg/day of albumin and/or fresh frozen plasma. Therapeutic plasma exchange in addition to pulse glucocorticoid therapy was associated with a lower in-hospital mortality risk in the unweighted (10.7% versus 28.2%; risk difference, 17.5%; 95% confidence interval, 2.6-32.4%; P = 0.02) and weighted analyses (11.5% versus 28.4%; risk difference, 17.0%; 95% confidence interval, 1.5-32.5%; P = 0.03) than pulse glucocorticoid therapy alone. CONCLUSIONS This retrospective cohort study using a national database suggests that therapeutic plasma exchange may improve the in-hospital prognosis of anti-GBM disease with dialysis-dependent kidney failure and without diffuse alveolar hemorrhage.
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Affiliation(s)
- Hideaki Watanabe
- Department of Clinical Epidemiology and Health Economics, The University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 1130033, Japan.
| | - Hayato Yamana
- Department of Clinical Epidemiology and Health Economics, The University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 1130033, Japan
- Data Science Center, Jichi Medical University, Shimotsuke, Japan
| | - Akira Okada
- Department of Prevention of Diabetes and Lifestyle-Related Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hiroki Matsui
- Department of Clinical Epidemiology and Health Economics, The University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 1130033, Japan
| | - Kiyohide Fushimi
- Department of Health Policy and Informatics, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hideo Yasunaga
- Department of Clinical Epidemiology and Health Economics, The University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 1130033, Japan
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Chen Y, Zhou C, Abdelhamid M, Jung CG, Michikawa M. Inhibition of Sirt2 Decreases ApoE Secretion in Astrocytes and Microglial Cells. J Biochem 2023; 174:409-420. [PMID: 37488092 DOI: 10.1093/jb/mvad054] [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: 02/15/2023] [Revised: 07/12/2023] [Accepted: 07/14/2023] [Indexed: 07/26/2023] Open
Abstract
Amyloid-β (Aβ) accumulation caused by an imbalance of the production and clearance of Aβ in the brain is associated with the development of Alzheimer's disease (ad). Apolipoprotein E (ApoE) (the strongest genetic risk factor) enhances Aβ clearance, preventing Aβ deposition. Sirtuin 2 (Sirt2) is an NAD+-dependent histone deacetylase and its inhibition has been reported to ameliorate memory impairment in ad-like model mice. However, the role of Sirt2 in ApoE secretion is unknown. Here, we found that inhibition of Sirt2 activity in primary cultured astrocytes and BV2 cells decreased ApoE secretion, resulting in the accumulation of intracellular ApoE and inhibiting extracellular Aβ degradation. However, the reduction of Sirt2 protein level by Sirt2 siRNA decreased ApoE protein level, which ultimately reduces ApoE secretion. In addition, the knockdown of Sirt2 in the HEK293-APP cells also decreased levels of intracellular ApoE leading to reduction of its secretion, which is accompanied by increased Aβ levels without altering APP and APP processing enzymes. Our findings provide a novel role of Sirt2 in ApoE secretion.
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Key Words
- Alzheimer's disease
- Sirt2Abbreviations: ad, Alzheimer’s disease; ABCA1, ATP-binding cassette protein A1; ADAM10, A disintegrin and metalloproteinase domain-containing protein 10; Aβ, Amyloid-beta; APP, Amyloid precursor protein; ApoE, Apolipoprotein E; BACE1, β-site amyloid precursor protein cleaving enzyme 1; IDE, Insulin degrading enzyme; NEP, Neprilysin; PS1, Presenilin 1; Sirt2, Sirtuin 2
- amyloid-β
- apolipoprotein E
- glial cells
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Affiliation(s)
- Yuxin Chen
- Department of Biochemistry, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan
| | - Chunyu Zhou
- Department of Biochemistry, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan
| | - Mona Abdelhamid
- Department of Biochemistry, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan
| | - Cha-Gyun Jung
- Department of Biochemistry, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan
| | - Makoto Michikawa
- Department of Biochemistry, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan
- Department of Geriatric Medicine School of Life Dentistry at Niigata, The Nippon Dental University, 1-8 Hamaura-cho, Chuo-ku, Niigata, 951-8580, Japan
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21
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Ohbe H, Tagami T, Endo A, Miyata S, Matsui H, Fushimi K, Kushimoto S, Yasunaga H. Trends in massive transfusion practice for trauma in Japan from 2011 to 2020: a nationwide inpatient database study. J Intensive Care 2023; 11:46. [PMID: 37853484 PMCID: PMC10585788 DOI: 10.1186/s40560-023-00685-0] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 08/20/2023] [Indexed: 10/20/2023] Open
Abstract
BACKGROUND Previous studies have reported conflicting results regarding fresh frozen plasma (FFP)-to-red blood cell (RBC) ratio and platelet-to-RBC ratio on outcomes for massive transfusion for trauma. Moreover, nationwide data on massive transfusion practices for trauma in the real-world clinical setting are scarce. This study aimed to examine the nationwide practice patterns and trends in massive transfusion for trauma in Japan using a national administrative, inpatient database. METHOD We identified patients who underwent emergency hospitalization for trauma and received massive transfusion, defined as administration of at least 20 units of RBC within the first 2 days of admission, using the nationwide inpatient database, which covers approximately 90% of all tertiary emergency hospitals in Japan, between 2011 and 2020. Trends in the incidence and practice patterns of massive transfusion were described by calendar year. The association of practice patterns with mortality or adverse events was tested. RESULTS A total of 3,530,846 trauma hospitalizations were identified, of which 5247 (0.15%) received massive transfusion. A significant declining trend was observed in the incidence of massive transfusion in trauma hospitalizations from 0.24% in 2011 to 0.10% in 2020 (P for trend < 0.001). The FFP-to-RBC ratio rose significantly from 0.77 in 2011 to 1.08 in 2020 (P for trend < 0.001), while the platelet-to-RBC ratio remained virtually unchanged from 0.71 in 2011 to 0.78 in 2020 (P for trend 0.060). Massive transfusion with lower FFP-to-RBC (< 0.75) and platelets-to-RBC ratio (< 1.00) were associated with increased in-hospital mortality compared with those ≥ 1.00, while there were linear increases in adverse events with increasing FFP and platelets ratios. CONCLUSIONS This study demonstrated a declining trend in the incidence and a rise in higher FFP-to-RBC ratios in massive transfusion in association with patient outcomes for trauma from 2011 to 2020 in Japan.
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Affiliation(s)
- Hiroyuki Ohbe
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
- Division of Emergency and Critical Care Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan.
| | - Takashi Tagami
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Department of Emergency and Critical Care Medicine, Nippon Medical School Musashikosugi Hospital, Kawasaki, Kanagawa, Japan
| | - Akira Endo
- Department of Acute Critical Care Medicine, Tsuchiura Kyodo General Hospital, Tsuchiura, Japan
| | - Shigeki Miyata
- Central Blood Institute, Blood Service Headquarters, Japanese Red Cross Society, Tokyo, Japan
| | - Hiroki Matsui
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Kiyohide Fushimi
- Department of Health Policy and Informatics, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
| | - Shigeki Kushimoto
- Division of Emergency and Critical Care Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hideo Yasunaga
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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22
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Yamaguchi K, Isobe H, Shoji M, Kawakami T, Miyagawa K. The Nature of the Chemical Bonds of High-Valent Transition-Metal Oxo (M=O) and Peroxo (MOO) Compounds: A Historical Perspective of the Metal Oxyl-Radical Character by the Classical to Quantum Computations. Molecules 2023; 28:7119. [PMID: 37894598 PMCID: PMC10609222 DOI: 10.3390/molecules28207119] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/08/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
This review article describes a historical perspective of elucidation of the nature of the chemical bonds of the high-valent transition metal oxo (M=O) and peroxo (M-O-O) compounds in chemistry and biology. The basic concepts and theoretical backgrounds of the broken-symmetry (BS) method are revisited to explain orbital symmetry conservation and orbital symmetry breaking for the theoretical characterization of four different mechanisms of chemical reactions. Beyond BS methods using the natural orbitals (UNO) of the BS solutions, such as UNO CI (CC), are also revisited for the elucidation of the scope and applicability of the BS methods. Several chemical indices have been derived as the conceptual bridges between the BS and beyond BS methods. The BS molecular orbital models have been employed to explain the metal oxyl-radical character of the M=O and M-O-O bonds, which respond to their radical reactivity. The isolobal and isospin analogy between carbonyl oxide R2C-O-O and metal peroxide LFe-O-O has been applied to understand and explain the chameleonic chemical reactivity of these compounds. The isolobal and isospin analogy among Fe=O, O=O, and O have also provided the triplet atomic oxygen (3O) model for non-heme Fe(IV)=O species with strong radical reactivity. The chameleonic reactivity of the compounds I (Cpd I) and II (Cpd II) is also explained by this analogy. The early proposals obtained by these theoretical models have been examined based on recent computational results by hybrid DFT (UHDFT), DLPNO CCSD(T0), CASPT2, and UNO CI (CC) methods and quantum computing (QC).
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Affiliation(s)
- Kizashi Yamaguchi
- SANKEN, Osaka University, Ibaraki 567-0047, Osaka, Japan
- Center for Quantum Information and Quantum Biology (QIQB), Osaka University, Toyonaka 560-0043, Osaka, Japan
| | - Hiroshi Isobe
- Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Okayama, Japan;
| | - Mitsuo Shoji
- Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Ibaraki, Japan; (M.S.); (K.M.)
| | - Takashi Kawakami
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka 560-0043, Osaka, Japan;
| | - Koichi Miyagawa
- Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Ibaraki, Japan; (M.S.); (K.M.)
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23
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Shichi A, Ishizuka H, Saitoh K. Phase Retrieval of Electron Rocking Curves using Total Variation and Total Squared Variation Regularizations. Microscopy (Oxf) 2023:dfad048. [PMID: 37793048 DOI: 10.1093/jmicro/dfad048] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 09/15/2023] [Accepted: 09/29/2023] [Indexed: 10/06/2023] Open
Abstract
In this study, a new method for the phase retrieval of electron rocking curves observed using convergent-beam electron diffraction, which is applicable to the determination of three-dimensional lattice displacement fields along the beam direction, is proposed. Total variation and total squared variation regularizations are introduced for phase retrieval to suppress overfitting to noise or background signals in the rocking curves and to reproduce the sparse characteristics of displacement fields, which exist only near lattice defects. The results show that the proposed algorithm is effective for rocking curves modulated by the dynamical effect of electron diffraction. The accuracy of phase reconstruction using the proposed method is also discussed. Phase retrieval of the experimental rocking curves obtained from a stacking fault in stainless steel is demonstrated.
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Affiliation(s)
- Akihiro Shichi
- Department of Applied Physics, Graduate School of Engineering, Nagoya University
| | - Hiroyuki Ishizuka
- Department of Applied Physics, Graduate School of Engineering, Nagoya University
| | - Koh Saitoh
- Institute of Materials and Systems for Sustainability, Nagoya University
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24
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Moh SM, Tojo S, Teruya T, Kato-Noguchi H. Allelopathic Activity of a Novel Compound, Two Known Sesquiterpenes, and a C 13Nor-Isopenoid from the Leave of Croton oblongifolius Roxb. for Weed Control. Plants (Basel) 2023; 12:3384. [PMID: 37836124 PMCID: PMC10574435 DOI: 10.3390/plants12193384] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 09/18/2023] [Accepted: 09/20/2023] [Indexed: 10/15/2023]
Abstract
Investigation of allelopathic substances from herbal plants may lead to the development of allelochemical-based natural herbicides. Croton oblongifolius (Roxb.) is a well-known herbal plant with a long history of being used for traditional medicines and for being the source of a diverse range of bioactive compounds. This plant has been reported to have allelopathic potential; however, its allelopathic-related substances have not yet been described. Therefore, we conducted this investigation to explore the allelopathic substances from the leaves of C. oblongifolius. Aqueous methanol extracts of C. oblongifolius leaves exhibited significant growth inhibitory potential against four test plants (monocot barnyard grass and timothy, and dicot cress and lettuce). The leaf extracts were purified in various chromatographic steps and yielded four active compounds identified as (3R,6R,7E)-3-hydroxy-4-7-megastigmadien-9-one (I), 2-hydroxy alpinolide (a novel compound) (II), alpinolide (III), and epialpinolide (IV) via an analysis of the spectral data. These identified compounds significantly restricted the seedling growth of cress. The concentration necessary for 50% growth reduction of the cress seedlings varied from 0.15 to 0.24 mM for (3R,6R,7E)-3-hydroxy-4-7-megastigmadien-9-one, 0.04 to 0.11 mM for 2-hydroxy alpinolide, 0.07 to 0.12 mM for alpinolide, and 0.09 to 0.16 mM for epialpinolide. Therefore, the leaf extracts of C. oblongifolius and the characterized compounds have the potential to be used as weed-suppressive resources for natural weed control.
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Affiliation(s)
- Seinn Moh Moh
- Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki 761-0795, Kagawa, Japan;
- The United Graduate School of Agricultural Sciences, Ehime University, Matsuyama 790-8566, Ehime, Japan
| | - Shunya Tojo
- Graduate School of Engineering and Science, University of the Ryukyus, 1 Senbaru, Nishihara 903-0213, Okinawa, Japan;
| | - Toshiaki Teruya
- Faculty of Education, University of the Ryukyus, 1 Senbaru, Nishihara 903-0213, Okinawa, Japan;
| | - Hisashi Kato-Noguchi
- Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki 761-0795, Kagawa, Japan;
- The United Graduate School of Agricultural Sciences, Ehime University, Matsuyama 790-8566, Ehime, Japan
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25
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Hatanaka A, Nakada S, Matsumoto G, Satoh K, Aketa I, Watanabe A, Hirakawa T, Tsujita T, Waku T, Kobayashi A. The transcription factor NRF1 (NFE2L1) activates aggrephagy by inducing p62 and GABARAPL1 after proteasome inhibition to maintain proteostasis. Sci Rep 2023; 13:14405. [PMID: 37658135 PMCID: PMC10474156 DOI: 10.1038/s41598-023-41492-9] [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: 06/10/2023] [Accepted: 08/28/2023] [Indexed: 09/03/2023] Open
Abstract
The ubiquitin‒proteasome system (UPS) and autophagy are the two primary cellular pathways of misfolded or damaged protein degradation that maintain cellular proteostasis. When the proteasome is dysfunctional, cells compensate for impaired protein clearance by activating aggrephagy, a type of selective autophagy, to eliminate ubiquitinated protein aggregates; however, the molecular mechanisms by which impaired proteasome function activates aggrephagy remain poorly understood. Here, we demonstrate that activation of aggrephagy is transcriptionally induced by the transcription factor NRF1 (NFE2L1) in response to proteasome dysfunction. Although NRF1 has been previously shown to induce the expression of proteasome genes after proteasome inhibition (i.e., the proteasome bounce-back response), our genome-wide transcriptome analyses identified autophagy-related p62/SQSTM1 and GABARAPL1 as genes directly targeted by NRF1. Intriguingly, NRF1 was also found to be indispensable for the formation of p62-positive puncta and their colocalization with ULK1 and TBK1, which play roles in p62 activation via phosphorylation. Consistently, NRF1 knockdown substantially reduced the phosphorylation rate of Ser403 in p62. Finally, NRF1 selectively upregulated the expression of GABARAPL1, an ATG8 family gene, to induce the clearance of ubiquitinated proteins. Our findings highlight the discovery of an activation mechanism underlying NRF1-mediated aggrephagy through gene regulation when proteasome activity is impaired.
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Affiliation(s)
- Atsushi Hatanaka
- Laboratory for Genetic Code, Graduate School of Life and Medical Sciences, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto, 610-0394, Japan
- Research Fellow of Japan Society for the Promotion of Science, Tokyo, Japan
| | - Sota Nakada
- Laboratory for Genetic Code, Department of Life and Medical Sciences, Doshisha University, Kyotanabe, Kyoto, Japan
| | - Gen Matsumoto
- Department of Anatomy and Neurobiology, Nagasaki University School of Medicine, Nagasaki, Japan
| | - Katsuya Satoh
- Laboratory for Genetic Code, Graduate School of Life and Medical Sciences, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto, 610-0394, Japan
| | - Iori Aketa
- Laboratory for Genetic Code, Graduate School of Life and Medical Sciences, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto, 610-0394, Japan
| | - Akira Watanabe
- Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Tomoaki Hirakawa
- Laboratory of Biochemistry, Faculty of Agriculture, Saga University, Saga, Japan
- The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima, Japan
| | - Tadayuki Tsujita
- Laboratory of Biochemistry, Faculty of Agriculture, Saga University, Saga, Japan
- The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima, Japan
| | - Tsuyoshi Waku
- Laboratory for Genetic Code, Department of Life and Medical Sciences, Doshisha University, Kyotanabe, Kyoto, Japan
| | - Akira Kobayashi
- Laboratory for Genetic Code, Graduate School of Life and Medical Sciences, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto, 610-0394, Japan.
- Laboratory for Genetic Code, Department of Life and Medical Sciences, Doshisha University, Kyotanabe, Kyoto, Japan.
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Takada A, Kamatari YO, Shimizu K, Okada A, Inoshima Y. Exploration of microRNA Biomarkers in Blood Small Extracellular Vesicles for Enzootic Bovine Leukosis. Microorganisms 2023; 11:2173. [PMID: 37764017 PMCID: PMC10535767 DOI: 10.3390/microorganisms11092173] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 08/21/2023] [Accepted: 08/24/2023] [Indexed: 09/29/2023] Open
Abstract
Enzootic bovine leukosis (EBL) is a B-cell lymphosarcoma caused by the bovine leukemia virus (BLV). While most infected cattle show no clinical signs, approximately 30% of infected cattle develop persistent lymphocytosis (PL), and a small percentage may develop EBL. Currently, there is no method for predicting the possibility of EBL onset. In this study, we analyzed the microRNAs (miRNAs) encapsulated in small extracellular vesicles (sEVs) in the blood to explore the biomarkers of EBL. To identify candidate biomarkers, blood samples were collected from three BLV-uninfected and three EBL cattle. Total RNA was extracted from filtered serum and used for microarray analysis. Due to their association with cancer in human orthologs, we selected three miRNAs as candidate biomarkers, bta-miR-17-5p, bta-miR-24-3p, and bta-miR-210, which were more than twice as abundant in EBL cattle than in BLV-uninfected cattle. Quantitative real-time polymerase chain reaction (qPCR) using serum RNAs from six cattle used for the microarray analysis was carried out for the detection of the three selected miRNAs. Additionally, bta-miR-92a, whose ortholog has been associated with cancer in humans, was also examined by qPCR. bta-miR-17-5p, bta-miR-24-3p, and bta-miR-92a, were successfully detected, but bta-miR-210 was not. To further evaluate the utility of these three miRNAs as biomarkers, new blood samples were collected from 31 BLV-uninfected and 30 EBL cattle. The levels of bta-miR-17-5p, bta-miR-24-3p, and bta-miR-92a, were significantly higher in EBL cattle than in BLV-uninfected cattle. These results suggest that increased levels of bta-miR-17-5p, bta-miR-24-3p, and bta-miR-92a in the blood could be used as biomarkers for EBL. This study may contribute to the control of BLV infections and develop a prediction method of EBL onset.
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Affiliation(s)
- Akane Takada
- Laboratory of Food and Environmental Hygiene, Cooperative Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Yuji O. Kamatari
- Institute of Glyco-Core Research (iGCORE), Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
- The United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
- Division of Instrumental Analysis, Life Science Research Center, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Kaori Shimizu
- Laboratory of Food and Environmental Hygiene, Cooperative Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Ayaka Okada
- Laboratory of Food and Environmental Hygiene, Cooperative Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
- Education and Research Center for Food Animal Health, Gifu University (GeFAH), 1-1 Yanagido, Gifu 501-1193, Japan
| | - Yasuo Inoshima
- Laboratory of Food and Environmental Hygiene, Cooperative Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
- Education and Research Center for Food Animal Health, Gifu University (GeFAH), 1-1 Yanagido, Gifu 501-1193, Japan
- Joint Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
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27
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Lim C, Inagaki M, Shinozaki T, Fujita I. Analysis of convolutional neural networks reveals the computational properties essential for subcortical processing of facial expression. Sci Rep 2023; 13:10908. [PMID: 37407668 DOI: 10.1038/s41598-023-37995-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 06/30/2023] [Indexed: 07/07/2023] Open
Abstract
Perception of facial expression is crucial for primate social interactions. This visual information is processed through the ventral cortical pathway and the subcortical pathway. However, the subcortical pathway exhibits inaccurate processing, and the responsible architectural and physiological properties remain unclear. To investigate this, we constructed and examined convolutional neural networks with three key properties of the subcortical pathway: a shallow layer architecture, concentric receptive fields at the initial processing stage, and a greater degree of spatial pooling. These neural networks achieved modest accuracy in classifying facial expressions. By replacing these properties, individually or in combination, with corresponding cortical features, performance gradually improved. Similar to amygdala neurons, some units in the final processing layer exhibited sensitivity to retina-based spatial frequencies (SFs), while others were sensitive to object-based SFs. Replacement of any of these properties affected the coordinates of the SF encoding. Therefore, all three properties limit the accuracy of facial expression information and are essential for determining the SF representation coordinate. These findings characterize the role of the subcortical computational processes in facial expression recognition.
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Affiliation(s)
- Chanseok Lim
- Laboratory for Cognitive Neuroscience, Graduate School of Frontier Biosciences, Osaka University, 1-4 Yamadaoka, Suita, Osaka, 565-0871, Japan
- Perceptual and Cognitive Neuroscience Laboratory, Graduate School of Frontier Biosciences, Osaka University, 1-4 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Mikio Inagaki
- Laboratory for Cognitive Neuroscience, Graduate School of Frontier Biosciences, Osaka University, 1-4 Yamadaoka, Suita, Osaka, 565-0871, Japan
- Center for Information and Neural Networks, National Institute of Information and Communications Technology, 1-4 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Takashi Shinozaki
- Center for Information and Neural Networks, National Institute of Information and Communications Technology, 1-4 Yamadaoka, Suita, Osaka, 565-0871, Japan
- Computational Neuroscience Laboratory, Faculty of Informatics, Kindai University, 3-4-1 Kowakae, Higashiosaka, Osaka, 577-8502, Japan
| | - Ichiro Fujita
- Laboratory for Cognitive Neuroscience, Graduate School of Frontier Biosciences, Osaka University, 1-4 Yamadaoka, Suita, Osaka, 565-0871, Japan.
- Center for Information and Neural Networks, National Institute of Information and Communications Technology, 1-4 Yamadaoka, Suita, Osaka, 565-0871, Japan.
- Research Organization of Science and Technology, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga, 525-8577, Japan.
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Phuc BH, Tuan VP, Binh TT, Tung PH, Tri TD, Dung HDQ, Thuan NPM, Fauzia KA, Tshibangu-Kabamba E, Alfaray RI, Saruuljavkhlan B, Matsumoto T, Akada J, Yamaoka Y. Comparative genomics of two Vietnamese Helicobacter pylori strains, CHC155 from a non-cardia gastric cancer patient and VN1291 from a duodenal ulcer patient. Sci Rep 2023; 13:8869. [PMID: 37258611 DOI: 10.1038/s41598-023-35527-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 05/19/2023] [Indexed: 06/02/2023] Open
Abstract
Helicobacter pylori is involved in the etiology and severity of several gastroduodenal diseases; however, plasticity of the H. pylori genome makes complete genome assembly difficult. We report here the full genomes of H. pylori strains CHC155 and VN1291 isolated from a non-cardia gastric cancer patient and a duodenal ulcer patient, respectively, and their virulence demonstrated by in vitro infection. Whole-genome sequences were obtained by combining long- and short-reads with a hybrid-assembly approach. Both CHC155 and VN1291 genome possessed four kinds of genomic island: a cag pathogenicity island (cagPAI), two type 4 secretion system islands within an integrative and conjugative element (tfs ICE), and prophage. CHC155 and VN1291 carried East Asian-type cagA and vacA s1m1, and outer membrane protein genes, including two copies of oipA. Corresponded to genetic determinants of antibiotic resistance, chromosomal mutations were identified in CHC155 (rdxA, gyrA, and 23S rRNA) and VN1291 (rdxA, 23S rRNA, and pbp1A). In vitro infection of AGS cells by both strains induced the cell scattering phenotype, tyrosine phosphorylation of CagA, and promoted high levels of IL8 secretion, indicating fully intact phenotypes of the cagPAI. Virulence genes in CHC155 and VN1291 genomes are crucial for H. pylori pathogenesis and are risk factors in the development of gastric cancer and duodenal ulcer. Our in vitro studies indicate that the strains CHC155 and VN1291 carry the pathogenic potential.
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Grants
- 21K08010 Ministry of Education, Culture, Sports, Science and Technology, Japan
- 21K07898 Ministry of Education, Culture, Sports, Science and Technology, Japan
- 221S0002 Ministry of Education, Culture, Sports, Science and Technology, Japan
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Affiliation(s)
- Bui Hoang Phuc
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Oita, Japan
- Faculty of Applied Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Vo Phuoc Tuan
- Department of Endoscopy, Cho Ray Hospital, Ho Chi Minh City, Vietnam
| | - Tran Thanh Binh
- Department of Endoscopy, Cho Ray Hospital, Ho Chi Minh City, Vietnam
| | - Pham Huu Tung
- Department of Endoscopy, Cho Ray Hospital, Ho Chi Minh City, Vietnam
| | - Tran Dinh Tri
- Department of Endoscopy, Cho Ray Hospital, Ho Chi Minh City, Vietnam
| | - Ho Dang Quy Dung
- Department of Endoscopy, Cho Ray Hospital, Ho Chi Minh City, Vietnam
| | | | - Kartika Afrida Fauzia
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Oita, Japan
- Department of Public Health and Preventive Medicine, Faculty of Medicine, Universitas Airlangga, Surabaya, 60115, Indonesia
- Helicobacter pylori and Microbiota Study Group, Institute of Tropical Disease, Universitas Airlangga, Surabaya, 60115, Indonesia
| | - Evariste Tshibangu-Kabamba
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Oita, Japan
- Department of Parasitology, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Ricky Indra Alfaray
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Oita, Japan
- Helicobacter pylori and Microbiota Study Group, Institute of Tropical Disease, Universitas Airlangga, Surabaya, 60115, Indonesia
| | - Batsaikhan Saruuljavkhlan
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Oita, Japan
| | - Takashi Matsumoto
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Oita, Japan
| | - Junko Akada
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Oita, Japan
| | - Yoshio Yamaoka
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Oita, Japan.
- Research Center for GLOBAL and LOCAL Infectious Diseases, Oita University, Yufu, Oita, Japan.
- Department of Medicine, Gastroenterology and Hepatology Section, Baylor College of Medicine, Houston, TX, USA.
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Ohbe H, Sasabuchi Y, Jo T, Michihata N, Matsui H, Yasunaga H. Kampo medicine in ICUs in Japan between 2010 and 2020. J Anesth 2023:10.1007/s00540-023-03190-8. [PMID: 37029302 DOI: 10.1007/s00540-023-03190-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 03/30/2023] [Indexed: 04/09/2023]
Affiliation(s)
- Hiroyuki Ohbe
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan.
| | - Yusuke Sasabuchi
- Department of Read World Evidence, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Taisuke Jo
- Department of Health Services Research, The University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Nobuaki Michihata
- Department of Health Services Research, The University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Hiroki Matsui
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
| | - Hideo Yasunaga
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
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Ali M, Kato Y, Shiraki N, Kume S. Generation of induced pluripotent stem cell-derived beta-cells in blood amino acids-like medium. Biol Open 2023; 12:287063. [PMID: 36811942 PMCID: PMC10084857 DOI: 10.1242/bio.059581] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Accepted: 02/14/2023] [Indexed: 02/24/2023] Open
Abstract
Traditional cell culture media do not accurately represent the availability of the nutrients in plasma. They usually contain a supraphysiological concentration of nutrients such as glucose, amino acids, etc. These high nutrients can alter the metabolism of cultured cells and induce metabolic phenotypes that do not reflect in vivo conditions. We demonstrate that the supraphysiological levels of nutrients interfere with endodermal differentiation. Refinement of media formulations has a potential application in maturity modulation of stem cell-derived β-cells (SC-β) generation in vitro. To address these issues, we established a defined culture system to derive SC-β-cells using a blood amino acids-like medium (BALM). Human induced pluripotent stem cells (hiPSCs) can be efficiently differentiated into the definitive endoderm, pancreatic progenitors, endocrine progenitors, and SC-β in BALM-based med. The differentiated cells secreted C-peptide in vitro in response to high glucose levels and expressed several pancreatic β-cell markers. In conclusion, amino acids at the physiological levels are sufficient for deriving functional SC-β cells.
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Affiliation(s)
- Marwa Ali
- School of Life Science and Technology, Tokyo Institute of Technology, 4259-B-25 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8501, Japan
| | - Yusuke Kato
- School of Life Science and Technology, Tokyo Institute of Technology, 4259-B-25 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8501, Japan
| | - Nobuaki Shiraki
- School of Life Science and Technology, Tokyo Institute of Technology, 4259-B-25 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8501, Japan
| | - Shoen Kume
- School of Life Science and Technology, Tokyo Institute of Technology, 4259-B-25 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8501, Japan
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Kitamura K, Watanabe T, Yamamoto M, Ishikawa N, Kasahara N, Abe S, Yamamoto H. A Newly Discovered Tendon Between the Genioglossus Muscle and Epiglottic Cartilage Identified by Histological Observation of the Pre-Epiglottic Space. Dysphagia 2023; 38:315-329. [PMID: 35678869 PMCID: PMC9873719 DOI: 10.1007/s00455-022-10469-7] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 05/16/2022] [Indexed: 01/28/2023]
Abstract
Epiglottic retroversion is difficult to explain anatomically. One reason is inadequate structural identification of the ligaments in the submucosal tissue anterior to the epiglottis (pre-epiglottic space, PES). Although studies have shown that tongue root movement plays a role in epiglottic retroversion, few morphological reports have investigated the attachment of the lingual muscles to the epiglottis. This study reconstructed the fiber structure of the PES by comprehensively analyzing fiber alignment in the PES focusing on the hyoepiglottic ligament, which runs between the lingual muscles and the epiglottis. Gross and microscopic observations of the submucosal structures from the tongue to the larynx of 20 cadavers (10 men, 10 women; mean age 79 years) were performed. A tendon continuing from the posterior part of the genioglossus muscle and attaching to the center of the epiglottic cartilage was identified in the midline area of the epiglottis. We named this tendon the glossoepiglottic tendon. In contrast, the hyoepiglottic ligament is found between the hyoid bone and the epiglottis and is attached from the lateral margin of the epiglottic cartilage to its base. Furthermore, the glossoepiglottic tendon consists of a high-density fiber bundle that is thicker than the hyoepiglottic ligament. These results show that the conventional hyoepiglottic ligament has a two-layer structure consisting of an upper fiber bundle connected to the genioglossus muscle and a lower fiber bundle connected to the hyoid bone. Sustained contraction of the posterior part of the genioglossus muscle therefore places the epiglottis under persistent traction, suggesting that its relaxation may cause epiglottic retroversion.
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Affiliation(s)
- Kei Kitamura
- Department of Histology and Developmental Biology, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, Tokyo, 101-0061, Japan.
| | - Tae Watanabe
- Department of Histology and Developmental Biology, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, Tokyo, 101-0061, Japan
| | - Masahito Yamamoto
- Department of Anatomy, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, Tokyo, 101-0061, Japan
| | - Noboru Ishikawa
- Department of Forensic Odontology and Anthropology, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, Tokyo, 101-0061, Japan
| | - Norio Kasahara
- Department of Histology and Developmental Biology, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, Tokyo, 101-0061, Japan
| | - Shinichi Abe
- Department of Anatomy, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, Tokyo, 101-0061, Japan
| | - Hitoshi Yamamoto
- Department of Histology and Developmental Biology, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, Tokyo, 101-0061, Japan
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Tezuka S, Tanaka M, Naganuma T, Tochigi K, Inagaki A, Myojo H, Yamazaki K, Allen ML, Koike S. Comparing information derived on food habits of a terrestrial carnivore between animal-borne video systems and fecal analyses methods. J Mammal 2023; 104:184-193. [PMID: 36876239 PMCID: PMC9976756 DOI: 10.1093/jmammal/gyac101] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 09/19/2022] [Indexed: 11/27/2022] Open
Abstract
In recent years, animal-borne video cameras have been used to identify the food habits of many species. However, the usefulness and difficulties of identifying food habits from animal-borne video cameras have not been sufficiently discussed in terrestrial mammals, especially large omnivores. The aim of this study is to compare the video analysis of foraging behavior by Asian black bears (Ursus thibetanus) acquired by camera collars with estimates from fecal analysis. We attached GPS collars equipped with video cameras to four adult Asian black bears in the Okutama mountains in central Japan from May to July 2018 and analyzed video clips for foraging behavior. Simultaneously, we collected bear feces in the same area to determine food habits. We found that using video analyses was advantageous to recognize foods, such as leaves or mammals, that were physically crushed or destroyed while bears chewed and digested foods, which are difficult to identify to species using fecal analyses. On the other hand, we found that camera collars are less likely to record food items that are infrequently or quickly ingested. Additionally, food items with a low frequency of occurrence and short foraging time per feeding were less likely to be detected when we increased the time between recorded clips. As one of the first applications of the video analysis method for bears, our study shows that video analysis can be an important method for revealing individual differences in diet. Although video analysis may have limitations for understanding the general foraging behavior of Asian black bears at the present stage, the accuracy of food habit data from camera collars can be improved by using it in combination with established techniques such as microscale behavior analyses.
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Affiliation(s)
- Shiori Tezuka
- Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
| | - Mii Tanaka
- Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
| | - Tomoko Naganuma
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, 183-8509, Japan
| | - Kahoko Tochigi
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, 183-8509, Japan
| | - Akino Inagaki
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, 183-8509, Japan
| | - Hiroaki Myojo
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, 183-8509, Japan
| | - Koji Yamazaki
- Faculty of Regional Environmental Science, Tokyo University of Agriculture, Setagaya, Tokyo 156-8502, Japan
| | - Maximilian L Allen
- Illinois Natural History Survey, University of Illinois, Champaign, Illinois, 61820, USA
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Hirano Y, Konishi T, Kaneko H, Itoh H, Matsuda S, Kawakubo H, Uda K, Matsui H, Fushimi K, Daiko H, Itano O, Yasunaga H, Kitagawa Y. Early postoperative non-steroidal anti-inflammatory drugs and anastomotic leakage after oesophagectomy. Br J Surg 2023; 110:260-266. [PMID: 36433812 DOI: 10.1093/bjs/znac399] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 09/10/2022] [Accepted: 10/31/2022] [Indexed: 11/27/2022]
Abstract
BACKGROUND Previous studies have suggested that postoperative non-steroidal anti-inflammatory drug (NSAID) use may increase the risk of anastomotic leakage after colorectal surgery. However, the association between NSAIDs and anastomotic leakage after oesophagectomy is unclear. The aim of this retrospective study was to assess the effect of early postoperative NSAID use on anastomotic leakage after oesophagectomy. METHODS The Data of patients who underwent oesophagectomy for cancer between July 2010 and March 2019 were extracted from a Japanese nationwide inpatient database. Stabilized inverse probability of treatment weighting (IPTW), propensity score matching, and instrumental variable analyses were performed to investigate the association between NSAID use in the early postoperative period (defined as the day of and the day after surgery) and short-term outcomes, adjusting for potential confounders. The primary outcome was anastomotic leakage. The secondary outcomes were acute kidney injury, gastrointestinal bleeding, and mortality. RESULTS Among 39 418 eligible patients, early postoperative NSAIDs were used by 16 211 individuals (41 per cent). Anastomotic leakage occurred in 5729 patients (15 per cent). In stabilized IPTW analyses, NSAIDs were not associated with anastomotic leakage (odds ratio 1.04, 95 per cent c.i. 0.97 to 1.10). The proportions of acute kidney injury and gastrointestinal bleeding, as well as 30-day mortality and in-hospital mortality, did not differ according to NSAID use. Propensity score matching and instrumental variable analyses demonstrated similar results. CONCLUSION Early postoperative NSAID use was not associated with anastomotic leakage or other complications in patients who underwent oesophagectomy.
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Affiliation(s)
- Yuki Hirano
- Department of Hepatobiliary-Pancreatic and Gastrointestinal Surgery, International University of Health and Welfare School of Medicine, Chiba, Japan
| | - Takaaki Konishi
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan
| | - Hidehiro Kaneko
- Department of Cardiovascular Medicine, The University of Tokyo, Tokyo, Japan
| | - Hidetaka Itoh
- Department of Cardiovascular Medicine, The University of Tokyo, Tokyo, Japan
| | - Satoru Matsuda
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Hirofumi Kawakubo
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Kazuaki Uda
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan
| | - Hiroki Matsui
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan
| | - Kiyohide Fushimi
- Department of Health Policy and Informatics, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
| | - Hiroyuki Daiko
- Division of Esophageal Surgery, National Cancer Center Hospital, Tokyo, Japan
| | - Osamu Itano
- Department of Hepatobiliary-Pancreatic and Gastrointestinal Surgery, International University of Health and Welfare School of Medicine, Chiba, Japan
| | - Hideo Yasunaga
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan
| | - Yuko Kitagawa
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
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Masuko S, Zaitsu T, Oshiro A, Ishimaru M, Aida J. Association between place of dental check-ups and work absenteeism among Japanese workers. J Occup Health 2023; 65:e12415. [PMID: 37354491 PMCID: PMC10290527 DOI: 10.1002/1348-9585.12415] [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: 01/19/2023] [Revised: 06/02/2023] [Accepted: 06/05/2023] [Indexed: 06/26/2023] Open
Abstract
OBJECTIVES Dental check-ups at the workplace provide the opportunity for early detection of dental diseases. Dental check-ups during working hours could reduce the number of days of absence from work due to visits to dental clinics outside the workplace. Although health check-ups are provided to workers in Japan, dental check-ups is not mandatory. This study aimed to determine the association between the place of dental check-ups and absenteeism due to visits to the dental clinic. METHODS This cross-sectional study used data from an online self-reported worker survey conducted for 2 weeks in March 2017. We applied linear regression analysis with robust variance to determine the association between the place of dental check-ups and absenteeism due to dental clinic visits while adjusting for sociodemographic, health, and oral health covariates. RESULTS The average age of the 3930 participants was 43.3 ± 11.7 years, and 52.3% were male. The number of days of absenteeism due to dental clinic visits in the past year for those who received check-ups only at the dental clinic and at the workplace were 0.57 ± 2.67 days and 0.21 ± 1.20 days, respectively. After adjusting for covariates, it was found that those who received dental check-ups at the workplace had 0.35 (95% CI, 0.12-0.58) fewer days of absence than those who received dental check-ups at the dental clinic. CONCLUSION Workers who received dental check-ups at the workplace were associated with fewer days of absence due to dental visits than those who received at the dental clinic.
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Grants
- 170501-01 Ministry of Health, Labor and Welfare, Japan
- 21FA1301 Ministry of Health, Labor and Welfare, Japan
- 22FA1010 Ministry of Health, Labor and Welfare, Japan
- 20K10245 Ministry of Education, Culture, Sports, Science and Technology, Japan
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Affiliation(s)
- Sayo Masuko
- Department of Oral Health Promotion, Graduate School of Medical and Dental SciencesTokyo Medical and Dental UniversityBunkyo‐kuJapan
| | - Takashi Zaitsu
- Department of Oral Health Promotion, Graduate School of Medical and Dental SciencesTokyo Medical and Dental UniversityBunkyo‐kuJapan
| | - Akiko Oshiro
- Department of Oral Health Promotion, Graduate School of Medical and Dental SciencesTokyo Medical and Dental UniversityBunkyo‐kuJapan
| | - Miho Ishimaru
- Department of Oral Health Promotion, Graduate School of Medical and Dental SciencesTokyo Medical and Dental UniversityBunkyo‐kuJapan
| | - Jun Aida
- Department of Oral Health Promotion, Graduate School of Medical and Dental SciencesTokyo Medical and Dental UniversityBunkyo‐kuJapan
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Suzuki S, Abe T, Endo T, Kaya H, Kitabayashi T, Kawasaki Y, Yamada T. Association of Pretreatment Neutrophil-to-Eosinophil Ratio with Clinical Outcomes in Patients with Recurrent or Metastatic Head and Neck Squamous Cell Carcinoma Treated with Nivolumab. Cancer Manag Res 2022; 14:3293-3302. [PMID: 36452436 PMCID: PMC9704394 DOI: 10.2147/cmar.s382771] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 10/13/2022] [Indexed: 01/03/2024] Open
Abstract
BACKGROUND There is a need to develop biomarkers for a more efficient use of immune checkpoint inhibitors (ICIs). Recently, it has been reported that peripheral blood components, including eosinophils, may be effective ICI biomarkers. This study was designed to evaluate the prognostic value of eosinophils for measuring the effects of nivolumab on recurrent/metastatic head and neck squamous cell carcinoma (R/M HNSCC). MATERIALS AND METHODS The study included 47 patients with R/M HNSCC treated with nivolumab. Eosinophil-related biomarkers, such as absolute eosinophil count (AEC), relative eosinophil count (REC), and neutrophil-to-eosinophil ratio (NER), were measured from the peripheral blood of the patients before nivolumab treatment. For each biomarker, the patients were divided into a high- and a low-value group according to their cutoff values, and these groups were compared. RESULTS Regarding AEC and REC, no significant improvement in the objective response rate (ORR) was observed between patients with AEC >0.9 × 103/μL and those with AEC <0.9 × 103/μL (p = 0.147) and between patients with REC >2.2% and those with REC <2.2% (p = 0.110). However, patients with NER <32 had improved ORR compared with those with NER >32 (P = 0.0361). Additionally, although patients with AEC >0.9 × 103/μL, REC >2.2%, and NER <32 had longer overall survival (OS) than those with AEC <0.9 × 103/μL, REC <2.2%, and NER >32, only patients with NER <32 showed prolonged progression-free survival (PFS) compared with those with NER >32 according to the Log rank test (p = 0.046, 0.027, and 0.035, respectively). Furthermore, the multivariate analysis revealed that baseline NER >32 (p = 0.027) was an independent prognostic factor for worse OS. CONCLUSION A pretreatment feature of low NER (NER <32) may predict better clinical outcomes in patients with R/M HNSCC treated with nivolumab.
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Affiliation(s)
- Shinsuke Suzuki
- Department of Otorhinolaryngology & Head and Neck Surgery, Akita University Graduate School of Medicine, Akita, 010-8543, Japan
| | - Tomoe Abe
- Department of Otorhinolaryngology & Head and Neck Surgery, Akita University Graduate School of Medicine, Akita, 010-8543, Japan
| | - Tentaro Endo
- Department of Otorhinolaryngology & Head and Neck Surgery, Akita University Graduate School of Medicine, Akita, 010-8543, Japan
| | - Haruka Kaya
- Department of Otorhinolaryngology & Head and Neck Surgery, Akita University Graduate School of Medicine, Akita, 010-8543, Japan
| | - Takuro Kitabayashi
- Department of Otorhinolaryngology & Head and Neck Surgery, Akita University Graduate School of Medicine, Akita, 010-8543, Japan
| | - Yohei Kawasaki
- Department of Otorhinolaryngology & Head and Neck Surgery, Akita University Graduate School of Medicine, Akita, 010-8543, Japan
| | - Takechiyo Yamada
- Department of Otorhinolaryngology & Head and Neck Surgery, Akita University Graduate School of Medicine, Akita, 010-8543, Japan
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Zhumadilov K, Ivannikov A, Stepanenko V, Toyoda S, Kazymbet P, Kaprin A, Ivanov S, Shegay P, Endo S, Hoshi M. Tooth enamel ESR dosimetry for Hiroshima 'black rain' zone residents. J Radiat Res 2022; 63:i61-i65. [PMID: 35968987 PMCID: PMC9377024 DOI: 10.1093/jrr/rrac024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 03/22/2022] [Indexed: 06/01/2023]
Abstract
Electron spin resonance (ESR) dosimetry was applied to human tooth enamel in order to obtain individual absorbed doses for victims of the Hiroshima bomb who lived in the 'black rain' area. The so-called 'black rain' fell in the form of precipitation on the western part of Hiroshima city and the northwestern suburbs within a few hours after the explosion of the atomic bomb on 6 August 1945, and exposed the population in this area. Only three tooth samples were collected from this area. Since the teeth were located at positions 1, 2 and 4, only the lingual portion was used for the analysis. The results showed that the excess dose after subtracting natural radiation for one (position 4; hh1) was background, for the second (position 2; hh2) it was 133 mGy, and for the other (position 1; hh3) it was 243 mGy. Based on these results, we further investigated the radiation dose attributed to dental X-rays and head CT scan. Such dose of the hh3 radiographic examination was estimated to be 57-160 mGy, which implies an additional exposure around 135 mGy after subtraction. On the other hand, the dose data of hh1 after subtracting dental X-rays was negative. This may mean that such additional doses are an overestimation. In addition, the effect of sunlight should be considered, which is the same direction of overestimation. As a result, the residual dose of 140 mGy suggests the inclusion of radiation from the 'black rain.'
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Affiliation(s)
- Kassym Zhumadilov
- Corresponding author. L.N. Gumilyov Eurasian National University, International Department of Nuclear Physics, New Materials and Technologies, 010008, Nur-Sultan, Kazhymukan Str., 13, ; Tel: +7-7172-709-500 internal: 33303
| | - Alexander Ivannikov
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Valeriy Stepanenko
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Shin Toyoda
- Department of Applied Physics, Faculty of Science, Okayama University of Science, Okayama 700-0005, Japan
| | - Polat Kazymbet
- Institute of Radiobiology and Radiation Protection, NJSC “Astana Medical University,” Beibitshilik Str. 49, 010000 Nur-Sultan, Kazakhstan
| | - Andrey Kaprin
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Sergey Ivanov
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
| | - Peter Shegay
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
- Hiroshima University, Hiroshima, Japan
| | - Satoru Endo
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
- Hiroshima University, Hiroshima, Japan
| | - Masaharu Hoshi
- A. Tsyb Medical Radiological Research Center – Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation
- Hiroshima University, Hiroshima, Japan
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Zenke K, Okinaka Y. Establishing an effective gene knockdown system using cultured cells of the model fish medaka ( Oryzias latipes). Biology Methods and Protocols 2022; 7:bpac011. [PMID: 35685404 PMCID: PMC9171500 DOI: 10.1093/biomethods/bpac011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 05/01/2022] [Accepted: 05/09/2022] [Indexed: 12/01/2022]
Abstract
In spite of the growing attention given to medaka (Oryzias latipes) as an excellent vertebrate model, an effective gene knockdown system has not yet been established using cultured cells of this fish species. In this study, a gene knockdown system using short interfering RNA (siRNA) in medaka cell lines was established through the optimization of transfection conditions. By extensive screening of several medaka cell lines and transfection reagents, OLHNI-2 cells and X-tremeGENE siRNA Transfection Reagent were selected as the best combination to achieve high transfection efficiency of siRNA without cytotoxic effect. Knockdown conditions were then refined using the endogenous heat shock protein 90 (Hsp90) genes as the siRNA targets. Among the parameters tested, cell density, serum concentration in the culture medium, and duration of transfection improved knockdown efficiency, where the target mRNA in cells transfected with each of the siRNAs was reduced from 12.0% to 26.7% of the control level. Our results indicate that the established knockdown system using siRNA is a promising tool for functional analysis of medaka genes in vitro.
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Affiliation(s)
| | - Yasushi Okinaka
- Correspondence address. Laboratory of Fish Pathology, Graduate School of Integrated Sciences for Life, Hiroshima University, Kagamiyama 1-4-4, Higashihiroshima, Hiroshima 739-8528, Japan. Tel: +81-82-424-7978; Fax: +81-82-424-7916; E-mail:
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Shobatake R, Ota H, Takahashi N, Ueno S, Sugie K, Takasawa S. Anorexigenic Effects of Intermittent Hypoxia on the Gut-Brain Axis in Sleep Apnea Syndrome. Int J Mol Sci 2021; 23:364. [PMID: 35008784 PMCID: PMC8745445 DOI: 10.3390/ijms23010364] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/23/2021] [Accepted: 12/28/2021] [Indexed: 02/07/2023] Open
Abstract
Sleep apnea syndrome (SAS) is a breathing disorder characterized by recurrent episodes of upper-airway collapse, resulting in intermittent hypoxia (IH) during sleep. Experimental studies with animals and cellular models have indicated that IH leads to attenuation of glucose-induced insulin secretion from pancreatic β cells and to enhancement of insulin resistance in peripheral tissues and cells, such as the liver (hepatocytes), adipose tissue (adipocytes), and skeletal muscles (myocytes), both of which could lead to obesity. Although obesity is widely recognized as a major factor in SAS, it is controversial whether the development of SAS could contribute directly to obesity, and the effect of IH on the expression of appetite regulatory genes remains elusive. Appetite is regulated appropriately by both the hypothalamus and the gut as a gut-brain axis driven by differential neural and hormonal signals. In this review, we summarized the recent epidemiological findings on the relationship between SAS and feeding behavior and focused on the anorexigenic effects of IH on the gut-brain axis by the IH-induced up-regulation of proopiomelanocortin and cocaine- and amphetamine-regulated transcript in neuronal cells and the IH-induced up-regulation of peptide YY, glucagon-like peptide-1 and neurotensin in enteroendocrine cells and their molecular mechanisms.
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Affiliation(s)
- Ryogo Shobatake
- Department of Neurology, Nara Medical University, 840 Shijo-cho, Kashihara 634-8522, Japan; (S.U.); (K.S.)
- Department of Neurology, Nara City Hospital, 1-50-1 Higashikidera-cho, Nara 630-8305, Japan;
- Department of Biochemistry, Nara Medical University, 840 Shijo-cho, Kashihara 634-8521, Japan;
| | - Hiroyo Ota
- Department Respiratory Medicine, Nara Medical University, 840 Shijo-cho, Kashihara 634-8522, Japan;
| | - Nobuyuki Takahashi
- Department of Neurology, Nara City Hospital, 1-50-1 Higashikidera-cho, Nara 630-8305, Japan;
| | - Satoshi Ueno
- Department of Neurology, Nara Medical University, 840 Shijo-cho, Kashihara 634-8522, Japan; (S.U.); (K.S.)
| | - Kazuma Sugie
- Department of Neurology, Nara Medical University, 840 Shijo-cho, Kashihara 634-8522, Japan; (S.U.); (K.S.)
| | - Shin Takasawa
- Department of Biochemistry, Nara Medical University, 840 Shijo-cho, Kashihara 634-8521, Japan;
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Okada A, Ono S, Yamaguchi S, Yamana H, Ikeda Kurakawa K, Michihata N, Matsui H, Nangaku M, Yamauchi T, Yasunaga H, Kadowaki T. Association between nutritional guidance or ophthalmological examination and discontinuation of physician visits in patients with newly diagnosed diabetes: A retrospective cohort study using a nationwide database. J Diabetes Investig 2021; 12:1619-1631. [PMID: 33459533 PMCID: PMC8409872 DOI: 10.1111/jdi.13510] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 01/12/2021] [Accepted: 01/14/2021] [Indexed: 12/12/2022] Open
Abstract
AIMS/INTRODUCTION Discontinuation of diabetes care has been studied mostly in patients with prevalent diabetes and not in patients with newly diagnosed diabetes, whose dropout risk is highest. Because enrolling patients in a prospective study will influence adherence, we retrospectively examined whether guideline-recommended practices, defined as nutritional guidance or ophthalmological examination, can prevent patient discontinuation of diabetes care after its initiation. MATERIALS AND METHODS We retrospectively identified adults with newly screened diabetes during checkups using a large Japanese administrative claims database (JMDC, Tokyo, Japan) that contains laboratory data and lifestyle questionnaires. We defined discontinuation of physician visits as a follow-up interval exceeding 6 months. We divided the patients into those who received guideline-recommended practices (nutritional guidance or ophthalmology consultation) within the same month as the first visit and those who did not. We calculated propensity scores and carried out inverse probability of treatment weighting analyses to compare discontinuation between the two groups. RESULTS We identified 6,508 patients with at least one physician consultation for diabetes care within 3 months after their checkup, including 4,574 patients without and 1,934 with guideline-recommended practices. After inverse probability of treatment weighting, patients with guideline-recommended practices had a significantly lower proportion of discontinuation than those without (17.2% vs 21.8%; relative risk 0.79, 95% confidence interval 0.69-0.91). CONCLUSIONS This study is the first to show that after adjustment for both patient and healthcare provider factors, guideline-recommended practices within the first month of physician consultation for diabetes care can decrease subsequent discontinuation of physician visits in patients with newly diagnosed diabetes.
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Grants
- 19AA2007 Ministry of Health, Labor and Welfare, Japan
- 20K18957 Ministry of Education, Culture, Sports, Science and Technology, Japan
- 20H03907 Ministry of Education, Culture, Sports, Science and Technology, Japan
- 17H05077 Ministry of Education, Culture, Sports, Science and Technology, Japan
- Japan Diabetes Society
- Ministry of Health, Labor and Welfare, Japan
- Japan Diabetes Society
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Affiliation(s)
- Akira Okada
- Department of Prevention of Diabetes and Lifestyle‐Related DiseasesGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Sachiko Ono
- Department of Eat‐loss MedicineGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Satoko Yamaguchi
- Department of Prevention of Diabetes and Lifestyle‐Related DiseasesGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Hayato Yamana
- Department of Health Services ResearchGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Kayo Ikeda Kurakawa
- Department of Prevention of Diabetes and Lifestyle‐Related DiseasesGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Nobuaki Michihata
- Department of Health Services ResearchGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Hiroki Matsui
- Department of Clinical Epidemiology and Health EconomicsThe University of TokyoTokyoJapan
| | - Masaomi Nangaku
- Division of Nephrology and EndocrinologyGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Toshimasa Yamauchi
- Department of Diabetes and MetabolismGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Hideo Yasunaga
- Department of Clinical Epidemiology and Health EconomicsThe University of TokyoTokyoJapan
| | - Takashi Kadowaki
- Department of Prevention of Diabetes and Lifestyle‐Related DiseasesGraduate School of MedicineThe University of TokyoTokyoJapan
- Toranomon HospitalTokyoJapan
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Kurokawa S, Hashimoto Y, Funamoto S, Murata K, Yamashita A, Yamazaki K, Ikeda T, Minatoya K, Kishida A, Masumoto H. In vivo recellularization of xenogeneic vascular grafts decellularized with high hydrostatic pressure method in a porcine carotid arterial interpose model. PLoS One 2021; 16:e0254160. [PMID: 34292963 PMCID: PMC8297896 DOI: 10.1371/journal.pone.0254160] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 06/22/2021] [Indexed: 02/06/2023] Open
Abstract
Autologous vascular grafts are widely used in revascularization surgeries for small caliber targets. However, the availability of autologous conduits might be limited due to prior surgeries or the quality of vessels. Xenogeneic decellularized vascular grafts from animals can potentially be a substitute of autologous vascular grafts. Decellularization with high hydrostatic pressure (HHP) is reported to highly preserve extracellular matrix (ECM), creating feasible conditions for recellularization and vascular remodeling after implantation. In the present study, we conducted xenogeneic implantation of HHP-decellularized bovine vascular grafts from dorsalis pedis arteries to porcine carotid arteries and posteriorly evaluated graft patency, ECM preservation and recellularization. Avoiding damage of the luminal surface of the grafts from drying significantly during the surgical procedure increased the graft patency at 4 weeks after implantation (P = 0.0079). After the technical improvement, all grafts (N = 5) were patent with mild stenosis due to intimal hyperplasia at 4 weeks after implantation. Neither aneurysmal change nor massive thrombosis was observed, even without administration of anticoagulants nor anti-platelet agents. Elastica van Gieson and Sirius-red stainings revealed fair preservation of ECM proteins including elastin and collagen after implantation. The luminal surface of the grafts were thoroughly covered with von Willebrand factor-positive endothelium. Scanning electron microscopy of the luminal surface of implanted grafts exhibited a cobblestone-like endothelial cell layer which is similar to native vascular endothelium. Recellularization of the tunica media with alpha-smooth muscle actin-positive smooth muscle cells was partly observed. Thus, we confirmed that HHP-decellularized grafts are feasible for xenogeneic implantation accompanied by recellularization by recipient cells.
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Affiliation(s)
- Shunji Kurokawa
- Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yoshihide Hashimoto
- Department of Material-Based Medical Engineering, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo, Japan
| | - Seiichi Funamoto
- Department of Material-Based Medical Engineering, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo, Japan
- Department of Biomedical Engineering, Osaka Institute of Technology, Osaka, Japan
| | - Kozue Murata
- Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- Institute for Advancement of Clinical and Translational Science, Kyoto University Hospital, Kyoto, Japan
| | - Akitatsu Yamashita
- Department of Material-Based Medical Engineering, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kazuhiro Yamazaki
- Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Tadashi Ikeda
- Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Kenji Minatoya
- Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Akio Kishida
- Department of Material-Based Medical Engineering, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hidetoshi Masumoto
- Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- * E-mail:
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Taniguchi T, Urayama K. Linear Dynamic Viscoelasticity of Dual Cross-Link Poly(Vinyl Alcohol) Hydrogel with Determined Borate Ion Concentration. Gels 2021; 7:71. [PMID: 34198560 PMCID: PMC8293174 DOI: 10.3390/gels7020071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 05/31/2021] [Accepted: 06/10/2021] [Indexed: 01/03/2023] Open
Abstract
We investigated the linear dynamic viscoelasticity of dual cross-link (DC) poly(vinyl alcohol) (PVA) (DC-PVA) hydrogels with permanent and transient cross-links. The concentrations of incorporated borate ions to form transient cross-links in the DC-PVA hydrogels (CBIN) were determined by the azomethine-H method. The dynamic viscoelasticity of the DC-PVA hydrogel cannot be described by a simple sum of the dynamic viscoelasticity of the PVA gel with the same permanent cross-link concentration and the PVA aqueous solution with the same borate ion concentration (CB = CBIN) as in the DC-PVA gel. The DC-PVA hydrogel exhibited a considerably higher relaxation strength, indicating that the introduction of permanent cross-links into temporary networks increases the number of viscoelastic chains with finite relaxation times. In contrast, the relaxation frequency (ωc) (given by the frequency at the maximum of loss modulus) for the DC-PVA hydrogel was slightly lower but comparable to that for a dilute PVA solution with the same CB. This signifies that the relaxation dynamics of the DC-PVA hydrogels is essentially governed by the lifetime of an interchain transient cross-link (di-diol complex of boron). The effect of permanent cross-linking on the relaxation dynamics was observed in the finite broadening of the relaxation-time distribution in the long time region.
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Affiliation(s)
| | - Kenji Urayama
- Department of Macromolecular Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan;
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Abbasi S, Uchida S. Multifunctional Immunoadjuvants for Use in Minimalist Nucleic Acid Vaccines. Pharmaceutics 2021; 13:644. [PMID: 34062771 PMCID: PMC8147386 DOI: 10.3390/pharmaceutics13050644] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/25/2021] [Accepted: 04/27/2021] [Indexed: 12/13/2022] Open
Abstract
Subunit vaccines based on antigen-encoding nucleic acids have shown great promise for antigen-specific immunization against cancer and infectious diseases. Vaccines require immunostimulatory adjuvants to activate the innate immune system and trigger specific adaptive immune responses. However, the incorporation of immunoadjuvants into nonviral nucleic acid delivery systems often results in fairly complex structures that are difficult to mass-produce and characterize. In recent years, minimalist approaches have emerged to reduce the number of components used in vaccines. In these approaches, delivery materials, such as lipids and polymers, and/or pDNA/mRNA are designed to simultaneously possess several functionalities of immunostimulatory adjuvants. Such multifunctional immunoadjuvants encode antigens, encapsulate nucleic acids, and control their pharmacokinetic or cellular fate. Herein, we review a diverse class of multifunctional immunoadjuvants in nucleic acid subunit vaccines and provide a detailed description of their mechanisms of adjuvanticity and induction of specific immune responses.
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Affiliation(s)
- Saed Abbasi
- Innovation Center of NanoMedicine, Kawasaki Institute of Industrial Promotion, 3-25-14 Tonomachi, Kawasaki-ku, Kawasaki 210-0821, Japan
| | - Satoshi Uchida
- Innovation Center of NanoMedicine, Kawasaki Institute of Industrial Promotion, 3-25-14 Tonomachi, Kawasaki-ku, Kawasaki 210-0821, Japan
- Medical Chemistry, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 1-5 Shimogamohangi-cho, Sakyo-ku, Kyoto 606-0823, Japan
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Morioka N, Moriwaki M, Tomio J, Fushimi K, Ogata Y. Dementia and patient outcomes after hip surgery in older patients: A retrospective observational study using nationwide administrative data in Japan. PLoS One 2021; 16:e0249364. [PMID: 33886588 PMCID: PMC8061936 DOI: 10.1371/journal.pone.0249364] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Accepted: 03/17/2021] [Indexed: 01/12/2023] Open
Abstract
Objective To investigate whether dementia is associated with incidence of adverse events and longer hospital stays in older adults who underwent hip surgery, after adjusting for individual social and nursing care environment. Design and setting Retrospective observational study using the linked data between the Japanese Diagnosis Procedure Combination database and the reports of the medical functions of hospital beds database in Japan (April 2016—March 2017). Participants A total of 48,797 individuals aged 65 and older who underwent hip surgery and were discharged during the study period. Methods Outcomes included in-hospital death, in-hospital pneumonia, in-hospital fracture, and longer hospital stay. We performed two-level, multilevel models adjusting for individual and hospital characteristics. Results Among all participants, 20,638 individuals (42.3%) had dementia. The incidence of adverse events for those with and without dementia included in-hospital death: 2.11% and 1.11%, in-hospital pneumonia: 0.15% and 0.07%, and in-hospital fracture: 3.76% and 3.05%, respectively. The median (inter quartile range) length of hospital stay for those with and without dementia were 26 (19–39) and 25 (19–37) days, respectively. Overall, the odds ratios (95% confidence interval (CI)) of dementia for in-hospital death, in-hospital pneumonia, and in-hospital fracture were 1.12 (0.95–1.33), 0.95 (0.51–1.80), and 1.08 (0.92–1.25), respectively. Dementia was not associated with the length of hospital stay (% change) (-0.7%, 95% CI -1.6–0.3%). Admission from home, discharge to home, and lower nurse staffing were associated with prolonged hospital stays. Conclusions Although adverse events are more likely to occur in older adults with dementia than in those without dementia after hip surgery, we found no evidence of an association between dementia and adverse events or the length of hospital stay after adjusting for individual social and nursing care environment.
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Affiliation(s)
- Noriko Morioka
- Graduate School of Health Care Sciences, Tokyo Medical and Dental University, Tokyo, Japan
- * E-mail:
| | - Mutsuko Moriwaki
- Department of Tokyo Metropolitan Health Policy Advisement, Graduate School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Jun Tomio
- Department of Public Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kiyohide Fushimi
- Health Policy and Informatics, Graduate School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yasuko Ogata
- Graduate School of Health Care Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Nakata H, Hashimoto T, Yoshiki A. Quick validation of genetic quality for conditional alleles in mice. Genes Cells 2021; 26:240-245. [PMID: 33540482 PMCID: PMC8247991 DOI: 10.1111/gtc.12834] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 01/22/2021] [Accepted: 01/28/2021] [Indexed: 11/29/2022]
Abstract
Site-specific conditional inactivation technologies using Cre-loxP or Flp-FRT systems are becoming increasingly important for the elucidation of gene function and disease mechanism in vivo. A large number of gene knockout mouse models carrying complex conditional alleles have been generated by global community efforts and made available for biomedical researchers. The structures of conditional alleles in these mice are becoming increasingly complex and sophisticated, and so the validation of the genetic quality of these alleles is likewise becoming a laborious task for individual researchers. To ensure the reproducibility of conditional experiments, the researcher should confirm that loxP or FRT is integrated at the correct positions in the genome prior to start of the experiments. We report the successful design of universal PCR primers specific to loxP and FRT for the quick validation of conditional floxed and Flrted alleles. The primer set consists of forward and reverse primers complimentary to the loxP or FRT sequences with partial modifications at the 5' end containing 6-base restriction endonuclease recognition sites. The universal primer set was tested to detect genomic intervals between a pair of cis-integrated loxP or FRT and was useful for quickly validating various floxed or Flrted alleles in conditional mice.
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Affiliation(s)
- Hatsumi Nakata
- Experimental Animal DivisionRIKEN BioResource Research CenterTsukubaJapan
| | - Tomomi Hashimoto
- Experimental Animal DivisionRIKEN BioResource Research CenterTsukubaJapan
| | - Atsushi Yoshiki
- Experimental Animal DivisionRIKEN BioResource Research CenterTsukubaJapan
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Takeuchi H, Hasan SMT, Zaman K, Takanashi S, Hore SK, Yeasmin S, Ahmad SM, Alam MJ, Jimba M, Iwata T, Khan MA. Impact of Haemophilus influenzae type b combination vaccination on asthma symptoms and pneumonia in 5-year-old children in rural Bangladesh: a longitudinal study and comparison with a previous cross-sectional study. Respir Res 2021; 22:35. [PMID: 33536028 PMCID: PMC7856731 DOI: 10.1186/s12931-021-01629-8] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 01/19/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Although the prevalence of bronchial asthma has been increasing worldwide since the 1970's, the prevalence among 5-year-old children was significantly lower in 2016 than in 2001 in rural Bangladesh. We aimed to determine whether the Haemophilus influenzae type b (Hib) combination vaccination (without booster) started in 2009 contributed to this decrease. METHODS A case-control study was conducted among 1658 randomly selected 5-year-old children from Matlab, Bangladesh. Data on wheezing were collected using the International Study of Asthma and Allergies in Childhood questionnaire. The vaccination data were collected from the records of the Matlab Health and Demographic Surveillance System, while data on pneumonia were obtained from the clinical records of Matlab Hospital. Adjusted odds ratios (aORs) were calculated for the risk for wheezing. The reduction rate was calculated to determine the impact of the vaccination on pneumonia history between the present study and our previous study conducted in 2001 by using the following formula: (percentage of pneumonia cases in 2001 - percentage of pneumonia cases in 2016)/(percentage of pneumonia cases in 2001) times 100 (%). RESULTS Hib combination vaccination was a protecting factor against wheezing (aOR: 0.50; p = 0.010), while pneumonia at 1, 2, 3-4 years of age were risk factors for wheezing (aOR: 2.86, 3.19, 2.86; p = 0.046, 0.030, 0.030, respectively). The history of pneumonia was significantly lower in the 2016 study participants than those in 2001 both in the overall cohort and the wheezing group (paired t-test: p = 0.012, p < 0.001, respectively). Whereas the history of pneumonia decreased when the children grew older in the 2001 overall cohort, it peaked at the age of 2 years in 2016 wheezing group. The reduction rate decreased when children grew older in both the overall cohort and the wheezing group, however, it decreased faster in the wheezing group. CONCLUSIONS Hib combination vaccination was a protective factor against wheezing in 0-year-old children. However, the effects of vaccination might have attenuated at the ages of 1-4 years, because no booster dose was administered. The addition of a booster dose might further decrease the prevalence of asthma and wheezing.
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Affiliation(s)
- Haruko Takeuchi
- Department of Community and Global Health, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo City, Tokyo 113-0033, Japan.
| | - S M Tafsir Hasan
- Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), 68, Shaheed Tajuddin Ahmed Sarani, Mohakhali, Dhaka 1212, Bangladesh
| | - Khalequ Zaman
- Infectious Diseases Division, icddr,b, 68, Shaheed Tajuddin Ahmed Sarani, Mohakhali, Dhaka 1212, Bangladesh
| | - Sayaka Takanashi
- Department of Developmental Medical Sciences, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo City, Tokyo 113-0033, Japan
- Infectious Disease Surveillance Center, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku City, Tokyo 162-8640, Japan
| | - Samar Kumar Hore
- Organization for Population Health Environment & Nutrition, Adilpur Shastitala, Taltala Kheyaghat Road, Abhaynagar, Jashore 7460, Bangladesh
| | - Sultana Yeasmin
- Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), 68, Shaheed Tajuddin Ahmed Sarani, Mohakhali, Dhaka 1212, Bangladesh
| | - Shaikh Meshbahuddin Ahmad
- Infectious Diseases Division, icddr,b, 68, Shaheed Tajuddin Ahmed Sarani, Mohakhali, Dhaka 1212, Bangladesh
- Department of Biochemistry and Microbiology, North South University, Bashundhara, Dhaka 1212, Bangladesh
| | - Md Jahangir Alam
- Infectious Diseases Division, icddr,b, 68, Shaheed Tajuddin Ahmed Sarani, Mohakhali, Dhaka 1212, Bangladesh
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Masamine Jimba
- Department of Community and Global Health, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo City, Tokyo 113-0033, Japan
| | - Tsutomu Iwata
- The Graduate School of Humanities and Life Sciences, Tokyo Kasei University, 1-18-1 Kaga, Itabashi City, Tokyo 173-8602, Japan
| | - Md Alfazal Khan
- Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), 68, Shaheed Tajuddin Ahmed Sarani, Mohakhali, Dhaka 1212, Bangladesh
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Kaneko H, Itoh H, Yotsumoto H, Kiriyama H, Kamon T, Fujiu K, Morita K, Michihata N, Jo T, Takeda N, Morita H, Yasunaga H, Komuro I. Impact of hospital volume on clinical outcomes of hospitalized heart failure patients: analysis of a nationwide database including 447,818 patients with heart failure. BMC Cardiovasc Disord 2021; 21:49. [PMID: 33494701 PMCID: PMC7836495 DOI: 10.1186/s12872-021-01863-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Accepted: 01/11/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Hospital volume is known to be associated with outcomes of patients requiring complicated medical care. However, the relationship between hospital volume and prognosis of hospitalized patients with heart failure (HF) remains not fully understood. We aimed to clarify the impact of hospital volume on clinical outcomes of hospitalized HF patients using a nationwide inpatient database. METHODS AND RESULTS We studied 447,818 hospitalized HF patients who were admitted from January 2010 and discharged until March 2018 included in the Japanese Diagnosis Procedure Combination database. According to the number of patients, patients were categorized into three groups; those treated in low-, medium-, and high-volume centers. The median age was 81 years and 238,192 patients (53%) were men. Patients who had New York Heart Association class IV symptom and requiring inotropic agent within two days were more common in high volume centers than in low volume centers. Respiratory support, hemodialysis, and intra-aortic balloon pumping were more frequently performed in high volume centers. As a result, length of hospital stay was shorter, and in-hospital mortality was lower in high volume centers. Lower in-hospital mortality was associated with higher hospital volume. Multivariable logistic regression analysis fitted with generalized estimating equation indicated that medium-volume group (Odds ratio 0.91, p = 0.035) and high-volume group (Odds ratio 0.86, p = 0.004) had lower in-hospital mortality compared to the low-volume group. Subgroup analysis showed that this association between hospital volume and in-hospital mortality among overall population was seen in all subgroups according to age, presence of chronic renal failure, and New York Heart Association class. CONCLUSION Hospital volume was independently associated with ameliorated clinical outcomes of hospitalized patients with HF.
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Affiliation(s)
- Hidehiro Kaneko
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
- The Department of Advanced Cardiology, The University of Tokyo, Tokyo, Japan.
| | - Hidetaka Itoh
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Haruki Yotsumoto
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Hiroyuki Kiriyama
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Tatsuya Kamon
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Katsuhito Fujiu
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
- The Department of Advanced Cardiology, The University of Tokyo, Tokyo, Japan
| | - Kojiro Morita
- The Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan
- The Department of Health Services Research, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Nobuaki Michihata
- The Department of Health Services Research, The University of Tokyo, Tokyo, Japan
| | - Taisuke Jo
- The Department of Health Services Research, The University of Tokyo, Tokyo, Japan
| | - Norifumi Takeda
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Hiroyuki Morita
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Hideo Yasunaga
- The Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan
| | - Issei Komuro
- The Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
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Hiraku Y, Watanabe J, Kaneko A, Ichinose T, Murata M. MicroRNA expression in lung tissues of asbestos-exposed mice: Upregulation of miR-21 and downregulation of tumor suppressor genes Pdcd4 and Reck. J Occup Health 2021; 63:e12282. [PMID: 34679210 PMCID: PMC8535435 DOI: 10.1002/1348-9585.12282] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 08/18/2021] [Accepted: 09/04/2021] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVES Asbestos causes lung cancer and malignant mesothelioma in humans, but the precise mechanism has not been well understood. MicroRNA (miRNA) is a short non-coding RNA that suppresses gene expression and participates in human diseases including cancer. In this study, we examined the expression levels of miRNA and potential target genes in lung tissues of asbestos-exposed mice by microarray analysis. METHODS We intratracheally administered asbestos (chrysotile and crocidolite, 0.05 or 0.2 mg/instillation) to 6-week-old ICR male mice four times weekly. We extracted total RNA from lung tissues and performed microarray analysis for miRNA and gene expression. We also carried out real-time polymerase chain reaction (PCR), Western blotting, and immunohistochemistry to confirm the results of microarray analysis. RESULTS Microarray analysis revealed that the expression levels of 14 miRNAs were significantly changed by chrysotile and/or crocidolite (>2-fold, P < .05). Especially, miR-21, an oncogenic miRNA, was significantly upregulated by both chrysotile and crocidolite. In database analysis, miR-21 was predicted to target tumor suppressor genes programmed cell death 4 (Pdcd4) and reversion-inducing-cysteine-rich protein with kazal motifs (Reck). Although real-time PCR showed that Pdcd4 was not significantly downregulated by asbestos exposure, Western blotting and immunohistochemistry revealed that PDCD4 expression was reduced especially by chrysotile. Reck was significantly downregulated by chrysotile in real-time PCR and immunohistochemistry. CONCLUSIONS This is the first study demonstrating that miR-21 was upregulated and corresponding tumor suppressor genes were downregulated in lung tissues of asbestos-exposed animals. These molecular events are considered to be an early response to asbestos exposure and may contribute to pulmonary toxicity and carcinogenesis.
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Grants
- 23659328 Ministry of Education, Culture, Sports, Science and Technology, Japan
- 24390153 Ministry of Education, Culture, Sports, Science and Technology, Japan
- 15H04784 Ministry of Education, Culture, Sports, Science and Technology, Japan
- 18H03038 Ministry of Education, Culture, Sports, Science and Technology, Japan
- Grants-in-Aid for Scientific Research
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Affiliation(s)
- Yusuke Hiraku
- Department of Environmental HealthUniversity of Fukui School of Medical SciencesEiheijiFukuiJapan
- Department of Environmental and Molecular MedicineMie University Graduate School of MedicineTsuMieJapan
| | - Jun Watanabe
- Department of Environmental and Molecular MedicineMie University Graduate School of MedicineTsuMieJapan
| | - Akira Kaneko
- Department of Environmental and Molecular MedicineMie University Graduate School of MedicineTsuMieJapan
| | - Takamichi Ichinose
- Department of Health SciencesOita University of Nursing and Health SciencesOitaJapan
| | - Mariko Murata
- Department of Environmental and Molecular MedicineMie University Graduate School of MedicineTsuMieJapan
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Abstract
OBJECTIVES To clarify whether or not the antihypertensive drug effect is proportional to the baseline pretreatment self-measured home blood pressure (HBP) in accordance with the law of initial value (Wilder's law). DESIGN A post-hoc analysis of a multicentre clinical trial. SETTING Outpatients across Japan with mild-to-moderate essential hypertension. PARTICIPANTS Among 3518 randomised participants, 2423 who self-measured HBP during the pretreatment drug-free period (10-28 days after starting fixed-dose antihypertensive monotherapy) with a mean 7.0 years follow-up were eligible. MAIN OUTCOME MEASURES We analysed individual HBP readings during pretreatment and monotherapy. RESULTS The day-to-day HBP during both the pretreatment period and monotherapy period remains almost the same throughout each period; the results were consistent, regardless of the pretreatment HBP. Following monotherapy, the reduction in the HBP increased by 2.2 mm Hg (95% CI: 1.8 to 2.5 mm Hg) per 10 mm Hg pretreatment HBP increase, up to 11.0 mm Hg (95% CI: 9.9 to 12.0 mm Hg) among patients with an HBP ≥165 mm Hg during pretreatment. Among the 1005 patients receiving low-dose monotherapy (defined daily dose: 0.5 units), the reduction peaked at 8.9-9.1 mm Hg in those with pretreatment HBP 155-164 mm Hg and ≥165 mm Hg (p=0.88). CONCLUSIONS According to Wilder's law, the HBP reduction due to fixed-dose monotherapy was proportional to the pretreatment HBP without any regression to the mean phenomenon. With low-dose antihypertensive drugs, however, the HBP reduction peaked in patients with a high pretreatment HBP, indicating the need for such patients to receive a sufficient amount of antihypertensive drug medication at the initial treatment. TRIAL REGISTRATION UMIN Clinical Trial Registry (http://www.umin.ac.jp/ctr), Unique identifier: C000000137.
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Affiliation(s)
- Hikari Sano
- Social Pharmacy and Regulatory Science, Showa Pharmaceutical University, Machida, Japan
| | - Azusa Hara
- Division of Drug Development and Regulatory Science, Faculty of Pharmacy, Keio University, Minato-ku, Japan
| | - Kei Asayama
- Research Unit Hypertension and Cardiovascular Epidemiology, KU Leuven Cardiovascular Sciences, Leuven, Belgium
- Hygiene and Public Health, Teikyo University School of Medicine, Itabashi-ku, Japan
- Tohoku Institute for Management of Blood Pressure, Sendai, Japan
| | - Seiko Miyazaki
- Social Pharmacy and Regulatory Science, Showa Pharmaceutical University, Machida, Japan
| | - Masahiro Kikuya
- Hygiene and Public Health, Teikyo University School of Medicine, Itabashi-ku, Japan
| | - Yutaka Imai
- Tohoku Institute for Management of Blood Pressure, Sendai, Japan
| | - Takayoshi Ohkubo
- Hygiene and Public Health, Teikyo University School of Medicine, Itabashi-ku, Japan
- Tohoku Institute for Management of Blood Pressure, Sendai, Japan
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49
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Ichiki Y, Shigematsu Y, Baba T, Shiota H, Fukuyama T, Nagata Y, So T, Yasuda M, Takenoyama M, Yasumoto K. Development of adoptive immunotherapy with KK-LC-1-specific TCR-transduced γδT cells against lung cancer cells. Cancer Sci 2020; 111:4021-4030. [PMID: 32780528 PMCID: PMC7648040 DOI: 10.1111/cas.14612] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/07/2020] [Accepted: 08/09/2020] [Indexed: 12/11/2022] Open
Abstract
The present study analyzed the antitumor effect of γδT cells transduced with the TCR of cancer-specific CTLs to establish forceful cancer-specific adoptive immunotherapy. We cloned the TCRαβ genes from CTLs showing HLA-B15 restricted recognition of Kita-Kyushu lung cancer antigen-1 (KK-LC-1), a cancer/germline gene antigen, identified in a lung adenocarcinoma case (F1121). The TCRαβ and CD8 genes were transduced into γδT cells induced from PBLs of healthy volunteers stimulated with zoledronate and IL-2. The KK-LC-1-specific TCRαβ-CD8 γδT cells showed cytotoxic activity against the KK-LC-1 positive lung cancer cell line F1121L and produced IFN-γ against F1121L and KK-LC-1 peptide-pulsed F1121 EBV-B cells. These responses were blocked by HLA class I and HLA-B/C antibodies. An in vivo assay using NOD/SCID mice with xenotransplantation of human lung cancer cells was performed, and the TCRαβ-CD8 transduced γδT cells (TCRαβ-CD8 γδT cells) were intravenously injected. Growth inhibition of KK-LC-1+ , HLA-B15+ lung cancer cells was confirmed in mice with injection of the TCRαβ-CD8 γδT cells from 1 wk after xenotransplantation of cancer cells but not in those treated 2 wk after xenotransplantation. The resected specimens of the tumor, 2 wk after xenotransplantation, highly expressed FasL but not programmed death ligand-1 (PD-L1) by immunohistochemical staining. FasL highly expressed cancer cells xenotransplanted 2 wk ago were resistant to TCRαβ-CD8 γδT cells injection. These results suggested that apoptosis of Fas-positive TCRαβ-CD8 γδT cells may be induced by a Fas-mediated signal after interacting with FasL-positive cancer cells.
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MESH Headings
- Animals
- Antigens, Neoplasm/immunology
- Cell Line, Tumor
- Cytokines/metabolism
- Disease Models, Animal
- Humans
- Immunomodulation
- Immunotherapy, Adoptive
- Lung Neoplasms/etiology
- Lung Neoplasms/metabolism
- Lung Neoplasms/pathology
- Lung Neoplasms/therapy
- Lymphocytes, Tumor-Infiltrating/immunology
- Lymphocytes, Tumor-Infiltrating/metabolism
- Lymphocytes, Tumor-Infiltrating/pathology
- Mice, Transgenic
- Receptors, Antigen, T-Cell, gamma-delta/metabolism
- T-Lymphocyte Subsets/immunology
- T-Lymphocyte Subsets/metabolism
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Cytotoxic/metabolism
- Transduction, Genetic
- Treatment Outcome
- Xenograft Model Antitumor Assays
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Grants
- Cancer Translational Research Project; Ministry of Health, Labour and Welfare of Japan
- Cancer Research Institute, UOEH Research Grant for Promotion of Occupational Health
- JP20390375 Ministry of Education, Culture, Sports, Science and Technology, Japan
- JP21659327 Ministry of Education, Culture, Sports, Science and Technology, Japan
- JP18K08806 Ministry of Education, Culture, Sports, Science and Technology, Japan
- JP19K09294 Ministry of Education, Culture, Sports, Science and Technology, Japan
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Affiliation(s)
- Yoshinobu Ichiki
- Department of General Thoracic SurgeryNational Hospital Organization, Saitama HospitalWakoJapan
- Second Department of SurgerySchool of MedicineUniversity of Occupational and Environmental HealthKitakyushuJapan
| | - Yoshiki Shigematsu
- Second Department of SurgerySchool of MedicineUniversity of Occupational and Environmental HealthKitakyushuJapan
- Department of Respiratory SurgeryIchinomiya‐Nishi HospitalIchinomiyaJapan
| | - Tetsuro Baba
- Second Department of SurgerySchool of MedicineUniversity of Occupational and Environmental HealthKitakyushuJapan
- Baba ClinicKasuya‐gunJapan
| | - Hironobu Shiota
- Second Department of SurgerySchool of MedicineUniversity of Occupational and Environmental HealthKitakyushuJapan
- Department of General Thoracic SurgeryChiba Rosai HospitalIchiharaJapan
| | - Takashi Fukuyama
- Second Department of SurgerySchool of MedicineUniversity of Occupational and Environmental HealthKitakyushuJapan
- Division of Biomedical ResearchKitasato University Medical CenterKitamotoJapan
| | - Yoshika Nagata
- Second Department of SurgerySchool of MedicineUniversity of Occupational and Environmental HealthKitakyushuJapan
- Department of Breast SurgeryShonan Kamakura General HospitalKamakuraJapan
| | - Tetsuya So
- Second Department of SurgerySchool of MedicineUniversity of Occupational and Environmental HealthKitakyushuJapan
- Department of Thoracic SurgeryShin‐Komonji HospitalKitakyusyuJapan
| | - Manabu Yasuda
- Second Department of SurgerySchool of MedicineUniversity of Occupational and Environmental HealthKitakyushuJapan
- Department of Chest SurgeryIizuka HospitalIizukaJapan
| | - Mitsuhiro Takenoyama
- Second Department of SurgerySchool of MedicineUniversity of Occupational and Environmental HealthKitakyushuJapan
- Department of Thoracic OncologyNational Hospital Organization Kyushu Cancer CenterFukuokaJapan
| | - Kosei Yasumoto
- Second Department of SurgerySchool of MedicineUniversity of Occupational and Environmental HealthKitakyushuJapan
- Kitakyushu Municipal Moji HospitalKitakyushuJapan
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50
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Ishii S, Lee S, Urakubo H, Kume H, Kasai H. Generative and discriminative model-based approaches to microscopic image restoration and segmentation. Microscopy (Oxf) 2020; 69:79-91. [PMID: 32215571 PMCID: PMC7141893 DOI: 10.1093/jmicro/dfaa007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 02/02/2020] [Accepted: 02/17/2020] [Indexed: 11/14/2022] Open
Abstract
Image processing is one of the most important applications of recent machine learning (ML) technologies. Convolutional neural networks (CNNs), a popular deep learning-based ML architecture, have been developed for image processing applications. However, the application of ML to microscopic images is limited as microscopic images are often 3D/4D, that is, the image sizes can be very large, and the images may suffer from serious noise generated due to optics. In this review, three types of feature reconstruction applications to microscopic images are discussed, which fully utilize the recent advancements in ML technologies. First, multi-frame super-resolution is introduced, based on the formulation of statistical generative model-based techniques such as Bayesian inference. Second, data-driven image restoration is introduced, based on supervised discriminative model-based ML technique. In this application, CNNs are demonstrated to exhibit preferable restoration performance. Third, image segmentation based on data-driven CNNs is introduced. Image segmentation has become immensely popular in object segmentation based on electron microscopy (EM); therefore, we focus on EM image processing.
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Affiliation(s)
- Shin Ishii
- Graduate School of Informatics, Kyoto University, Kyoto 606-8501, Japan
- ATR Neural Information Analysis Laboratories, Kyoto 619-0288, Japan
- International Research Center for Neurointelligence, The University of Tokyo, Tokyo 113-0033, Japan
| | - Sehyung Lee
- Graduate School of Informatics, Kyoto University, Kyoto 606-8501, Japan
- International Research Center for Neurointelligence, The University of Tokyo, Tokyo 113-0033, Japan
| | - Hidetoshi Urakubo
- Graduate School of Informatics, Kyoto University, Kyoto 606-8501, Japan
| | - Hideaki Kume
- International Research Center for Neurointelligence, The University of Tokyo, Tokyo 113-0033, Japan
- Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Haruo Kasai
- International Research Center for Neurointelligence, The University of Tokyo, Tokyo 113-0033, Japan
- Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
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