12 results on '"K Tokuno"'
Search Results
2. Structures of the s-cis and s-trans conformers of (E)-5-methylthio-1,5-diphenyl-1-penten-3-one
- Author
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M. Matsui, T. Ohashi, F. Miyoshi, Y. Asao, K. Kihara, and K. Tokuno
- Subjects
Stereochemistry ,Chemistry ,X-ray crystallography ,Molecule ,General Medicine ,Crystal structure ,Conformational isomerism ,General Biochemistry, Genetics and Molecular Biology - Published
- 1986
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3. Prognostic impact and risk factors of severe neutropenia in the early phase of treatment with trifluridine-tipiracil for metastatic colorectal cancer patients: a single-center retrospective study.
- Author
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Omori Y, Matsukuma S, Kawa M, Ishimitsu K, Kawaoka T, Akiyama N, Tokuno K, Fujita Y, Sato S, and Yamamoto S
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- Humans, Male, Retrospective Studies, Female, Middle Aged, Aged, Risk Factors, Prognosis, Uracil analogs & derivatives, Uracil therapeutic use, Uracil adverse effects, Antineoplastic Combined Chemotherapy Protocols adverse effects, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Adult, Aged, 80 and over, Colorectal Neoplasms drug therapy, Colorectal Neoplasms pathology, Neutropenia chemically induced, Trifluridine adverse effects, Trifluridine therapeutic use, Trifluridine administration & dosage, Thymine, Pyrrolidines adverse effects, Pyrrolidines therapeutic use, Neoplasm Metastasis, Drug Combinations
- Abstract
Purpose: We aimed to identify the risk factors for severe neutropenia in the early phase of trifluridine-tipiracil (FTD/TPI) treatment, and their impact on overall survival (OS)., Methods: This single-center retrospective study included patients with unresectable metastatic colorectal cancer who were treated with FTD/TPI. The primary endpoint was OS, and the secondary endpoint was severe neutropenia during the first and second cycles of FTD/TPI. We assessed the association between outcomes and potential confounders using multivariate analysis., Results: Of the 77 total patients, 33 developed severe neutropenia during the first and second treatment cycles. In Cox hazard analysis, the independent factors associated with OS were neutropenia ≥ grade 1 during cycles 1 and 2 (adjusted hazard ratio 0.43; 95% confidence interval (CI) 0.21-0.87), combined treatment with bevacizumab (0.47; 95% CI 0.27-0.83), number of metastatic organs ≥ 3 (2.15; 95% CI 1.22-3.82), and time since diagnosis of metastasis until commencement of FTD/TPI < 18 months (1.94; 95% CI 1.13-3.33). Severe neutropenia during cycles 1 and 2 was not associated with OS (0.75; 0.44-1.27). The risk of severe neutropenia adjusted for initial dose reduction was defined as renal impairment with creatinine clearance (Ccr) of < 60 ml/min (adjusted odds ratio, 4.67; 95% CI, 1.38-15.80) and absolute neutrophil count (per 1000/μl, 0.47; 0.27-0.81)., Conclusion: The neutropenia ≥ grade 1 during cycles 1 and 2 of FTD/TPI is a predictor of favorable outcomes; however, the effect of severe neutropenia on OS was not clear. Renal impairment was also associated with severe neutropenia., Competing Interests: Declarations. Conflict of interest: The authors declare no competing interests., (© 2025. The Author(s).)
- Published
- 2025
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4. Tooth loss-related dietary patterns and cognitive impairment in an elderly Japanese population: The Nakajima study.
- Author
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Ishimiya M, Nakamura H, Kobayashi Y, Noguchi-Shinohara M, Abe C, Dohmoto C, Ikeda Y, Tokuno K, Ooi K, Yokokawa M, Iwasa K, Komai K, Kawashiri S, and Yamada M
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- Aged, Aged, 80 and over, Cross-Sectional Studies, Female, Geriatric Assessment methods, Geriatric Assessment statistics & numerical data, Health Surveys methods, Health Surveys statistics & numerical data, Humans, Male, Nutrition Assessment, Regression Analysis, Cognition physiology, Cognitive Dysfunction physiopathology, Diet, Feeding Behavior physiology, Tooth Loss physiopathology
- Abstract
Although several studies have demonstrated a potential correlation of dietary patterns with cognitive function, the relationship between tooth loss and dietary patterns and cognitive function have not been identified. In this cross-sectional study, we used a reduced rank regression (RRR) analysis, a technique used previously to observe dietary patterns based on the intakes of nutrients or levels of biomarkers associated with the condition of interest, to identify tooth loss-related dietary patterns and investigate the associations of such patterns with cognitive impairment in 334 community-dwelling Japanese subjects aged ≥ 60 years. According to Pearson correlation coefficients, the intakes of six nutrients (ash content, sodium, zinc, vitamin B1, α- and β-carotene) correlated significantly with the number of remaining teeth. Using RRR analysis, we extracted four dietary patterns in our subject population that explained 86.67% of the total variation in the intakes of these six nutrients. Particularly, dietary pattern 1 (DP1) accounted for 52.2% of the total variation. Food groups with factor loadings of ≥ 0.2 included pickled green leafy vegetables, lettuce/cabbage, green leaves vegetables, cabbage, carrots/squash; by contrast, rice had a factor loading of <-0.2. In a multivariate regression analysis, the adjusted odds ratios regarding the prevalence of cognitive impairment for the lowest, middle and highest tertiles of the DP1 score were 1.00 (reference), 1.224 (95% confidence interval [CI]: 0.611-2.453) and 0.427 (95% CI: 0.191-0.954), respectively. To our knowledge, this is the first report to show that tooth loss-related dietary patterns are associated with a high prevalence of cognitive impairment. These results may motivate changes in dental treatment and the dietary behaviours and thereby lower the risk of cognitive impairment.
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- 2018
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5. Impact of chemotherapy for colorectal cancer on regulatory T-cells and tumor immunity.
- Author
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Maeda K, Hazama S, Tokuno K, Kan S, Maeda Y, Watanabe Y, Kamei R, Shindo Y, Maeda N, Yoshimura K, Yoshino S, and Oka M
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- Adult, Aged, Antineoplastic Combined Chemotherapy Protocols therapeutic use, CD4-Positive T-Lymphocytes immunology, Female, Fluorouracil administration & dosage, Forkhead Transcription Factors biosynthesis, Humans, Immunotherapy methods, Leucovorin administration & dosage, Male, Middle Aged, Antineoplastic Agents therapeutic use, Colorectal Neoplasms drug therapy, Colorectal Neoplasms immunology, T-Lymphocytes immunology
- Abstract
Background: Regulatory T-cells (Tregs) actively engage in the maintenance of immunological self-tolerance and immune homeostasis. The purpose of the present study was to determine how oxaliplatin plus infusional 5-fluorouracil and leucovorin (FOLFOX) and irinotecan plus infusional 5-fluorouracil and leucovorin (FOLFIRI) affect Tregs and other immune effectors., Patients and Methods: A total of 27 patients with metastatic colorectal cancer received the FOLFOX (n=17) or FOLFIRI (n=10) chemotherapeutic regimen. Blood samples were collected from patients before and 7 days after chemotherapy. The prevalence of Tregs co-expressing CD4(+)FoxP3(+) was analyzed with flow cytometry., Results: The percentage and the number of CD4(+)FoxP3(+) Tregs were significantly reduced after FOLFOX and FOLFIRI in the patients who had high levels of Tregs before chemotherapy. On the other hand, the total number of lymphocytes and the population of CD4(+) T lymphocytes were unchanged., Conclusion: FOLFOX and FOLFIRI may enhance antitumor immunity via suppression of Tregs.
- Published
- 2011
6. Poly[[bis-{μ(3)-tris-[2-(1H-tetra-zol-1-yl)eth-yl]amine}copper(II)] bis-(perchlorate)].
- Author
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Werner F, Tokuno K, Hasegawa M, Linert W, and Mereiter K
- Abstract
In the title compound, {[Cu(C(9)H(15)N(13))(2)](ClO(4))(2)}(n), the Cu(2+) cation lies on an inversion center and is coordinated by the tetra-zole N(4) atoms of six symmetry-equivalent tris-[2-(1H-tetra-zol-1-yl)eth-yl]amine ligands (t(3)z) in the form of a Jahn-Teller-distorted octa-hedron with Cu-N bond distances of 2.0210 (8), 2.0259 (8) and 2.4098 (8) Å. The tertiary amine N atom is stereochemically inactive. The cationic part of the structure, viz. [Cu(t(3)z)(2)](2+), forms an infinite two-dimensional network parallel to (100), in pockets of which the perchlorate anions reside. The individual networks are partially inter-locked and held together by C-H⋯O inter-actions to the perchlorate anions and C-H⋯N inter-actions to tetra-zole N atoms.
- Published
- 2010
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7. (1R,2R)-1,2-Diphenyl-1,2-bis-(1H-tetra-zol-1-yl)ethane.
- Author
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Werner F, Mereiter K, Tokuno K, Inagaki Y, and Hasegawa M
- Abstract
The title compound, C(16)H(14)N(8), is a new chiral ligand designed for applications in supra-molecular chemistry and Fe(2+) spin-crossover complexes. The crystal structure shows a herring-bone arrangement of the mol-ecules, which are mutually linked via inter-molecular C-H⋯N inter-actions mainly donated by the alkyl and tetra-zole H atoms.
- Published
- 2009
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8. Increased prevalence of regulatory T-cells in the peripheral blood of patients with gastrointestinal cancer.
- Author
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Tokuno K, Hazama S, Yoshino S, Yoshida S, and Oka M
- Subjects
- Biomarkers, Case-Control Studies, Flow Cytometry, Gastrointestinal Neoplasms immunology, Humans, Gastrointestinal Neoplasms blood, T-Lymphocytes, Regulatory cytology
- Abstract
Background: Although recent studies have shown that FoxP3 represent the most specific Treg marker only a few studies have reported on the presence of FoxP3(+)Treg in peripheral blood., Patients and Methods: Peripheral blood mononuclear cells (PBMC) were harvested from 37 healthy volunteers and 94 patients with gastrointestinal cancer. The prevalence of Treg co-expressing CD4(+)FoxP3(+) was analyzed using flow cytometry., Results: The prevalence of Treg in the peripheral blood of gastrointestinal cancer patients was significantly higher than that in healthy volunteers (p=0.012). In early stage I cancer, Treg levels tended to be higher than those in healthy volunteers (p=0.069); these levels were significantly reduced after tumor resection (p=0.0027)., Conclusion: The prevalence of Treg was increased in patients with gastrointestinal cancer, even in the early stages of the disease. Since Treg levels decreased after curative resection, it is possible that tumor cells may have induced and expanded the Treg pool.
- Published
- 2009
9. Concomitant overexpression of heat-shock protein 70 and HLA class-I in hepatitis C virus-related hepatocellular carcinoma.
- Author
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Yoshida S, Hazama S, Tokuno K, Sakamoto K, Takashima M, Tamesa T, Torigoe T, Sato N, and Oka M
- Subjects
- Aged, Aged, 80 and over, Carcinoma, Hepatocellular immunology, Carcinoma, Hepatocellular pathology, Carcinoma, Hepatocellular virology, Female, Hepatitis C immunology, Hepatitis C pathology, Humans, Immunohistochemistry, Liver Neoplasms immunology, Liver Neoplasms pathology, Liver Neoplasms virology, Male, Middle Aged, Carcinoma, Hepatocellular metabolism, HLA Antigens biosynthesis, HSP70 Heat-Shock Proteins biosynthesis, Hepacivirus isolation & purification, Hepatitis C metabolism, Histocompatibility Antigens Class I biosynthesis, Liver Neoplasms metabolism
- Abstract
Background: Human leukocyte antigen (HLA) class I expression is reportedly frequently reduced in cancer. We examined heat-shock protein (HSP) expression in hepatocellular carcinoma (HCC)., Patients and Methods: HCV-related HCC was examined in 73 patients who had undergone hepatectomy, and the relationship between HSP70 and HLA class I expressions, clinicopathological factors and survival was evaluated., Results: Immunohistochemically positive results for HSP70 and HLA class I were seen in 67 (92%) and 43 cases (59%), respectively, while 38 patients (52%) were positive for both. Increased HSP70 immunoreactivity was significantly associated with high histological grade of tumor differentiation (p = 0.0179), whereas reduced HLA class I immunoreactivity was significantly associated with large tumor size (p = 0.0082). No differences were apparent between disease-free and overall survival in regard to expression levels., Conclusion: These results suggest that HSP70 expression may be related to tumor differentiation and HLA class I loss may occur with tumor growth in HCV-related HCC.
- Published
- 2009
10. Adoptive immunotherapy for pancreatic cancer using MUC1 peptide-pulsed dendritic cells and activated T lymphocytes.
- Author
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Kondo H, Hazama S, Kawaoka T, Yoshino S, Yoshida S, Tokuno K, Takashima M, Ueno T, Hinoda Y, and Oka M
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- Aged, Aged, 80 and over, Carcinoma, Pancreatic Ductal immunology, Cell Line, Tumor, Female, Humans, Immunotherapy, Adoptive adverse effects, Lymphocyte Activation, Male, Middle Aged, Pancreatic Neoplasms immunology, Carcinoma, Pancreatic Ductal therapy, Dendritic Cells immunology, Immunotherapy, Adoptive methods, Mucin-1 immunology, Pancreatic Neoplasms therapy, T-Lymphocytes, Cytotoxic immunology
- Abstract
Background: Pancreatic cancer has a poor prognosis. The clinical efficacy of immunotherapy using both dendritic cells pulsed with MUC1 peptide (MUC1-DC) and, cytotoxic T lymphocyte (CTL) sensitized with a pancreatic cancer, YPK-1, expressing MUC1 (MUC1-CTL) was evaluated., Patients and Methods: Twenty patients with unresectable or recurrent pancreatic cancer were enrolled. Peripheral blood mononuclear cells (PBMCs) were separated into adherent cells for induction of MUC1-DCs and floating cells for MUC1-CTLs. MUC1-DCs were generated by culture with granulocyte monocyte colony stimulating factor (GM-CSF) and interleukin-4 (IL-4) and then exposed to MUC1 peptide and TNF-alpha. MUC1-CTLs were induced by co-culture with YPK-1 and then with interleukin-2 (IL-2). MUC1-DCs were injected intradermally and MUC1-CTLs were given intravenously., Results: Patients were treated from 2 to 15 times. One patient with multiple lung metastases experienced a complete response. Five patients had stable disease. The mean survival time was 9.8 months. No grade II-IV toxicity was observed., Conclusion: Adoptive immunotherapy with MUC1-DC and MUC1-CTL may be feasible and effective for pancreatic cancer.
- Published
- 2008
11. Spontaneous ischemic events in the brain and heart adapt the hearts of severely atherosclerotic mice to ischemia.
- Author
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Tokuno S, Hinokiyama K, Tokuno K, Löwbeer C, Hansson LO, and Valen G
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- Animals, Apolipoproteins E deficiency, Apolipoproteins E genetics, Apolipoproteins E physiology, Autoantigens blood, Brain Ischemia blood, Brain Ischemia complications, Calcium-Binding Proteins blood, Coloring Agents, Heart Function Tests, Ischemic Preconditioning methods, Male, Mice, Mice, Inbred C57BL, Mice, Knockout, Myocardial Ischemia blood, Myocardial Ischemia complications, Myocardium enzymology, Nerve Growth Factors blood, Nitric Oxide Synthase biosynthesis, Nitric Oxide Synthase deficiency, Nitric Oxide Synthase genetics, Nitric Oxide Synthase physiology, Nitric Oxide Synthase Type II, Receptors, LDL deficiency, Receptors, LDL genetics, Receptors, LDL physiology, S100 Calcium Binding Protein beta Subunit, Tetrazolium Salts, Troponin blood, Arteriosclerosis complications, Arteriosclerosis enzymology, Brain Ischemia pathology, Ischemic Preconditioning, Myocardial methods, Myocardial Ischemia pathology, S100 Proteins
- Abstract
To investigate if spontaneous ischemic events in mice with severe multi-organ atherosclerosis could adapt to ischemia, apolipoprotein E/LDL receptor knockout mice were fed an atherogenic diet for 7 to 9 months. Signs of spontaneous ischemia occurred. One to two days later, hearts were excised, Langendorff-perfused with induced global ischemia, and compared with mice without signs of disease. In vivo heart or brain infarctions were verified by heart histology and/or increased serum levels of cardiac troponin T and S100B. Hearts of mice with spontaneous ischemic events had improved function and reduced Langendorff-induced infarctions. To investigate the remote preconditioning effect of brain ischemia, bilateral ligation of the internal carotid arteries was performed in C57BL6 mice. Twenty-four hours later, their isolated hearts were protected against induced global ischemia. A possible role of inducible NO synthase (iNOS) was studied in iNOS knock out mice, who were not preconditioned by induced brain ischemia. Cardiac iNOS was unchanged 24 hours after preconditioning, suggesting that NO is a trigger rather than a mediator of protection. These findings suggest that spontaneous ischemic events in the brain and heart adapt the heart to ischemia. This can be mimicked by induced brain ischemia, with iNOS as a key factor of protection.
- Published
- 2002
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12. Enhancement of 5-hydroxytryptamine-induced contraction of the guinea pig ileum by a new sulfur compound, tripropylsulfonium bromide.
- Author
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Yoshimura M, Takamura S, Ishikawa T, Yoshida J, Yamada K, Miyoshi F, Tokuno K, and Ohashi T
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- Acetylcholine metabolism, Acetylcholine pharmacology, Animals, Atropine pharmacology, Drug Synergism, Female, Guinea Pigs, Histamine pharmacology, Ileum, In Vitro Techniques, Male, Morphine pharmacology, Nerve Endings metabolism, Physostigmine pharmacology, Sulfonium Compounds antagonists & inhibitors, Muscle Contraction drug effects, Muscle, Smooth drug effects, Onium Compounds pharmacology, Serotonin pharmacology, Sulfonium Compounds pharmacology
- Abstract
In the presence of tripropylsulfonium bromide (TPS) (1 X 10(-4) g/ml), a new compound, the phasic contraction of the isolated guinea pig ileum to 5-hydroxytryptamine (5-HT) (5 X 10(-7) g/ml) was consistently enhanced ("TPS effect"). TPS alone increased moderatley the spontaneous movement of the ileum. When the contraction height was calculated as the percentage of that to 5-HT alone, such was observed in the "TPS effect" to be 167.1 +/- 3.6% (mean +/- S.E., n = 80). TPS did not enhance the contraction due to acetylcholine or histamine. The "TPS effect" remained unaffected in the presence of dibenzyline (1 X 10(-7) g/ml), was abolished by morphine(1 X 10(-6) g/ml), tetrodotoxin (2 X 10(-8) g/ml) adenosine (3 X 10(-6) g/ml) and atropine (1 X 10(-7) g/ml) and was not observed under anoxic conditions. Eserine (1 X 10(-8) g/ml) strengthened the "TPS effect" markedly. It is concluded that this effect may be the result of the potentiating effect of TPS on the action of 5-HT through the M receptors, possibly by the facilitation of the acetylcholine-liberation from the nervous tissue.
- Published
- 1978
- Full Text
- View/download PDF
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