29 results on '"Tomiyasu Y"'
Search Results
2. Gene network inference and visualization tools for biologists: application to new human transcriptome datasets
- Author
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Hurley, D, Araki, H, Tamada, Y, Dunmore, B, Sanders, D, Humphreys, S, Affara, M, Imoto, S, Yasuda, K, Tomiyasu, Y, Tashiro, K, Savoie, C, Cho, V, Smith, S, Kuhara, S, Miyano, S, Charnock-Jones, DS, Crampin, EJ, Print, CG, Hurley, D, Araki, H, Tamada, Y, Dunmore, B, Sanders, D, Humphreys, S, Affara, M, Imoto, S, Yasuda, K, Tomiyasu, Y, Tashiro, K, Savoie, C, Cho, V, Smith, S, Kuhara, S, Miyano, S, Charnock-Jones, DS, Crampin, EJ, and Print, CG
- Abstract
Gene regulatory networks inferred from RNA abundance data have generated significant interest, but despite this, gene network approaches are used infrequently and often require input from bioinformaticians. We have assembled a suite of tools for analysing regulatory networks, and we illustrate their use with microarray datasets generated in human endothelial cells. We infer a range of regulatory networks, and based on this analysis discuss the strengths and limitations of network inference from RNA abundance data. We welcome contact from researchers interested in using our inference and visualization tools to answer biological questions.
- Published
- 2012
3. REPRESENTATIVENESS OF THE RETURNED SAMPLES ON MAIL QUESTIONNAIRE
- Author
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Tsudzuki, A., Ogino, S., Tomiyasu, Y., Hata, Y., Kajita, M., and Nagata, T.
- Abstract
Non-returned subjects on the mail questionnaire were interviewed about same topics, which were to be compared with responses of the returned subjects. Topics were about "entrance-examination systems of the high school". Subjects finally interviewed were 279 mothers of the middle school pupils. They were divided into four groups as follows; (1) the returned samples without follow-up, (2) the samples returned by the 1st follow-up, (3) the 2nd follow-up, and (4) the non-returned samples. Statistically significant differences among four groups were founded in some topics. The results indicated that the returned and the non-returned groups were samples of the different populations respectively. It was also suggested that the degree of involvement of the subjects about topics was one of the factors which caused those differences., 国立情報学研究所で電子化したコンテンツを使用している。
- Published
- 1968
4. A STUDY ON THE PSYCHOLOGICAL RELATIONSHIPS BETWEEN THE TEACHER AND THE MENTALLY RETARDED CHILDREN
- Author
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Ohnishi, S., Marui, F., Murakami, E., Hata, Y., Emi, Y., Suzuki, K., Ogino, S., Hirano, N., Tomiyasu, Y., Tomiyasu, R., Yamada, R., and Shogenji, N.
- Abstract
The aim of this research was to clarify the dynamic relationships between the teacher and the mentally retarded children in the classroom. Beyond the questionnaire level in which we were studying those relationship up to this time, we tried to study this problem in more concrete and real situation. For this purpose the teaching process analysis method was taken as our procedure. Two classes in the secondary school for the mentally retarded were chosen as the different typical patterns which were assumed from our previous research. The full member of our research group engaged to observe the practical teaching porocesses of both classes and analyzed those processes from the two major aspects. The first one was to compare quantitatively and qualitatively the degree of verbal communication by symbolizing the individual interaction between teacher and children as each basic unit. The second aspect was to find the dynamic process of the stream of the teaching situation by illustrating the each unit according to the teaching process. As the result, although we could find the considerable characteristics between those two classes at the standpoint of the teacher-children interaction, for the time being, we concluded not that such a different characteristics was caused by each teacher's ideational attitude on the education for the mentally retarded, but that each teacher who took such a different ideational attitude showed the characteristic type of the teacher-children interaction as to how to act and react to the children in the real classroom situation., 国立情報学研究所で電子化したコンテンツを使用している。
- Published
- 1964
5. A TRIAL OF THE NEW PERSONALITY TEST CONSTRUCTING THROUGH THE INTERPRETATION OF RESPONSE PATTERN (II)
- Author
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Tsudzuki, A., Murakami, E., Mizuyama, S., Tomiyasu, Y., Oda, K., and Ogino, S.
- Abstract
国立情報学研究所で電子化したコンテンツを使用している。
- Published
- 1968
6. FUNDAMENTAL STUDIES OF THE QUESTIONNAIRE METHOD : Basic data on pupils' understanding of words expressing personality attributes
- Author
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Kondo, S., Tsudzuki, A., Ohnishi, S., Kuze, T., Masuda, S., Kimura, S., Osada, M., Tomiyasu, Y., Oda, K., Sakai, R., and Hori, N.
- Abstract
国立情報学研究所で電子化したコンテンツを使用している。
- Published
- 1967
7. A STUDY ON THE EDUCATION OF MENTALLY RETARDED CHILDREN : On the parental attitude toward the children and the special class
- Author
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Ohnishi, S., Marui, F., Yamada, Y., Shogenji, Y., Hata, Y., Hisadome, I., Iwai, F., Murakami, E., Suzuki, K., Ogino, S., and Tomiyasu, Y.
- Abstract
The parental attitude to the mentally retarded children seems to be influenced by many conditions (IQ, onset of mental retardation, social status of family, etc.). We examined with questionnaire method about the relationship between the parental attitude and the surrounding conditions. The number of subjects were 547 parents of primary school children and 336 parents of middle school children. The method : We compared the responses of parents which were described about their children, the class and the teacher, with the evaluation of teachers to their pupils and parents about the attitude of their children. The findings obtained were as follows : (1) On the parental attitudes about the entrance to the classes for the mentally retarded, the parents of lower IQ children had a tendency to desire to enter the class, but a quarter of the parents whose children had IQ suitable degree (IQ50∿74) to enter that class did not desire. (2) The correlation of the parental attitudes about the entrance to the classes for the mentally retarded and social status of the family had no significant meaning. (3) There were some significant relationship between the zealousness of parental attitudes to education and the degree of satisfaction to the entrance. According to the evalution of teachers. they are zealous about the education of their children. On the contrary, the parents with unfavorable feeling to the special class did not devote to the education of their children., 国立情報学研究所で電子化したコンテンツを使用している。
- Published
- 1965
8. A TRIAL OF THE NEW PERSONALITY TEST CONSTRUCTING THROUGH THE INTERPRETATION OF RESPONSE PATTERN (1)
- Author
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Tsudzuki, A., Tomiyasu, Y., Oda, K., and Ogino, S.
- Abstract
国立情報学研究所で電子化したコンテンツを使用している。
- Published
- 1968
9. Effects of Nonylphenol and Phytoestrogen-Enriched Diet on Plasma Vitellogenin, Steroid Hormone, Hepatic Cytochrome P450 1A, and Glutathione-S-Transferase Values in Goldfish (Carassius auratus)
- Author
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Hiroshi Ishibashi, Tachibana, K., Tsuchimoto, M., Soyano, K., Tatarazako, N., Matsumura, N., Tomiyasu, Y., Tominaga, N., and Arizono, K.
10. Studies on Alginic Acid
- Author
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TOMIYASU, Y., primary, HARA, T., additional, and MIYAKE, M., additional
- Published
- 1950
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11. Studies on Methods of Lowering B.O.D. and Nitrogen-Contents in Night Soil
- Author
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Abe, N., primary, Esaki, H., additional, Tanaka, Y., additional, Nakao, Y., additional, Ryu, N., additional, and Tomiyasu, Y., additional
- Published
- 1967
- Full Text
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12. Studies on alginic acid
- Author
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TOMIYASU, Y., primary, HARA, T., additional, and MIYAKE, M., additional
- Published
- 1949
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13. Prevalence and Independent Factors for Fatty Liver and Significant Hepatic Fibrosis Using B-Mode Ultrasound Imaging and Two Dimensional-Shear Wave Elastography in Health Check-up Examinees.
- Author
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Yamamura S, Kawaguchi T, Nakano D, Tomiyasu Y, Yoshinaga S, Doi Y, Takahashi H, Anzai K, Eguchi Y, and Torimura T
- Subjects
- Aged, Fatty Liver pathology, Female, Humans, Liver diagnostic imaging, Liver Cirrhosis diagnostic imaging, Liver Cirrhosis pathology, Male, Metabolic Syndrome diagnosis, Metabolic Syndrome epidemiology, Middle Aged, Prevalence, Elasticity Imaging Techniques methods, Fatty Liver epidemiology, Liver Cirrhosis epidemiology, Ultrasonography methods
- Abstract
Background and Aim: Exercise is beneficial for metabolic syndrome. Fatty liver and significant hepatic fibrosis, hepatic manifestations of metabolic syndrome, are becoming an epidemic. We aimed to investigate the prevalence of fatty liver and significant fibrosis and examined the independent factors for these conditions., Subjects and Methods: We enrolled 1,361 health check-up examinees (median age, 53 years; female/male, 813/548). Fatty liver and fibrosis were evaluated by B-mode ultrasound imaging and shear wave elastography. Factors associated with fatty liver and significant fibrosis were analyzed by logistic regression analysis., Results: Fatty liver and significant fibrosis were observed in 50.5% and 42.7% of enrolled subjects, respectively. Independent factors associated with fatty liver were BMI (OR 1.46; 95%CI 1.397-1.537; P<0.0001) and no exer cise habits (OR 1.47; 95% CI 1.101-1.984; P=0.0093). Independent factors associated with significant fibrosis were age, female, BMI (OR 1.37; 95%CI 1.311-1.436; P<0.0001), and no exercise habits (OR 1.49; 95% CI 1.102-2.031; P=0.0097)., Conclusions: Fatty liver and significant fibrosis were frequently seen in health check-up examinees and the common independent factors were higher BMI and no exercise habits. Thus, weight loss and exercise may ameliorate fatty liver and significant hepatic fibrosis in the general population.
- Published
- 2021
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14. Positional cloning and comprehensive mutation analysis identified a novel KDM2B mutation in a Japanese family with minor malformations, intellectual disability, and schizophrenia.
- Author
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Yokotsuka-Ishida S, Nakamura M, Tomiyasu Y, Nagai M, Kato Y, Tomiyasu A, Umehara H, Hayashi T, Sasaki N, Ueno SI, and Sano A
- Subjects
- Cloning, Molecular methods, DNA Mutational Analysis, Exome genetics, Female, Genetic Linkage, Genetic Predisposition to Disease, Haplotypes genetics, Histone Demethylases genetics, Histones genetics, Humans, Intellectual Disability epidemiology, Intellectual Disability pathology, Japan epidemiology, Male, Marfan Syndrome epidemiology, Marfan Syndrome pathology, Methylation, Mutation genetics, Pedigree, Schizophrenia epidemiology, Schizophrenia pathology, Exome Sequencing, F-Box Proteins genetics, Intellectual Disability genetics, Jumonji Domain-Containing Histone Demethylases genetics, Marfan Syndrome genetics, Schizophrenia genetics
- Abstract
The importance of epigenetic control in the development of the central nervous system has recently been attracting attention. Methylation patterns of lysine 4 and lysine 36 in histone H3 (H3K4 and H3K36) in the central nervous system are highly conserved among species. Numerous complications of body malformations and neuropsychiatric disorders are due to abnormal histone H3 methylation modifiers. In this study, we analyzed a Japanese family with a dominant inheritance of symptoms including Marfan syndrome-like minor physical anomalies (MPAs), intellectual disability, and schizophrenia (SCZ). We performed positional cloning for this family using a single nucleotide polymorphism (SNP) array and whole-exome sequencing, which revealed a missense coding strand mutation (rs1555289644, NM_032590.4: c.2173G>A, p.A725T) in exon 15 on the plant homeodomain of the KDM2B gene as a possible cause of the disease in the family. The exome sequencing revealed that within the coding region, only a point mutation in KDM2B was present in the region with the highest logarithm of odds score of 2.41 resulting from whole genome linkage analysis. Haplotype analysis revealed co-segregation with four affected family members (IV-9, III-4, IV-5, and IV-8). Lymphoblastoid cell lines from the proband with this mutation showed approximately halved KDM2B expression in comparison with healthy controls. KDM2B acts as an H3K4 and H3K36 histone demethylase. Our findings suggest that haploinsufficiency of KDM2B in the process of development, like other H3K4 and H3K36 methylation modifiers, may have caused MPAs, intellectual disability, and SCZ in this Japanese family.
- Published
- 2021
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15. Profiles of advanced hepatic fibrosis evaluated by FIB-4 index and shear wave elastography in health checkup examinees.
- Author
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Yamamura S, Kawaguchi T, Nakano D, Tomiyasu Y, Yoshinaga S, Doi Y, Takahashi H, Anzai K, Eguchi Y, Torimura T, and Shiba N
- Abstract
Aim: Advanced hepatic fibrosis is seen in individuals with potential hepatocellular carcinoma and cardiovascular disease. Hepatic fibrosis can be assessed using a combination of the FIB-4 index and imaging modalities, including shear wave elastography. We aimed to investigate the prevalence of advanced fibrosis in the general population and the profiles associated with advanced fibrosis using a data-mining analysis., Methods: We enrolled 1155 health checkup examinees (median age 53 years, 685 women, 470 male). Advanced fibrosis was defined by FIB-4 index ≥1.3 and liver stiffness ≥8.07 kPa using shear wave elastography. Participants were classified as normal-mild fibrosis (n = 1035) or advanced fibrosis (n = 120). Factors associated with advanced fibrosis were analyzed by logistic regression and decision-tree analyses., Results: Advanced fibrosis was observed in 10.4% of participants (120/1155). In the logistic regression analysis, independent factors for advanced fibrosis were age (≥75 years; OR 2.12, 95% CI 1.021-4.415; P = 0.0419) and the presence of metabolic syndrome (OR 2.51, 95% CI 1.416-4.462; P = 0.0017). The decision-tree analysis showed two profiles associated with advanced fibrosis: profile 1 - individuals aged ≥65 years with metabolic syndrome and mild-to-moderate alcohol consumption (prevalence of advanced fibrosis 73.3%); and profile 2 - individuals without metabolic syndrome, aged ≥75 years, with no exercise habit (prevalence of advanced fibrosis 56.3%)., Conclusions: Advanced fibrosis was observed in 10.4% of health checkup examinees. Furthermore, we showed that aging, metabolic syndrome with mild-to-moderate alcohol consumption, and physical inactivity were associated with advanced fibrosis. Thus, prevention of metabolic syndrome and alcohol withdrawal, as well as exercise habits, might inhibit the progression of hepatic fibrosis., (© 2019 The Japan Society of Hepatology.)
- Published
- 2020
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16. First observation of N-acetyl leucine and N-acetyl isoleucine in diabetic patient hair and quantitative analysis by UPLC-ESI-MS/MS.
- Author
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Min JZ, Tomiyasu Y, Morotomi T, Jiang YZ, Li G, Shi Q, Yu HF, Inoue K, Todoroki K, and Toyo'oka T
- Subjects
- Adult, Chromatography, High Pressure Liquid, Female, Healthy Volunteers, Humans, Male, Middle Aged, Molecular Structure, Spectrometry, Mass, Electrospray Ionization, Young Adult, Hair chemistry, Isoleucine analysis, Leucine analysis
- Abstract
Background: Type 2 diabetes patients (DP) have significantly higher plasma levels of valine, leucine, isoleucine and alanine than the controls. Specific amino acids may acutely and chronically regulate insulin secretion from the pancreatic β-cells. We recently identified a metabolic signature of N-acetyl leucine (Ac-Leu) that strongly predicts diabetes development in mice hair. The Ac-Leu appears to be a potential biomarker candidate related to diabetes. However, the determination of Ac-Leu in human hair has not been reported. We measured the Ac-Leu, and its structure is similar to N-acetyl isoleucine (Ac-Ile) in human hair by ultra-performance liquid chromatography (UPLC) with electrospray ionization tandem mass spectrometry (ESI-MS/MS). The developed method was applied to the determination of Ac-Leu and Ac-Ile in the hair of healthy volunteers (HV) and DP., Methods: Ac-Leu, Ac-Ile and N-acetyl norleucine (Ac-Nle, IS) were extracted from human hair samples by a micropulverized extraction procedure, then separated on a C18 column by isocratic elution of acetonitrile-0.1% formic acid in water:0.1% formic acid (14:86, vol./vol.). MRM using the fragmentation transitions of m/z 174.1→86.1 in the positive ESI mode was performed to quantify the N-acetyl leucine, N-acetyl isoleucine and IS., Results: Ac-Leu, Ac-Ile and Ac-Nle in the human hair samples were completely separated by isocratic elution of a 5.0 min duration wash program using a reversed-phase column, and sensitively detected by LC-MS/MS in the ESI(+) MRM mode. The amounts of Ac-Leu and Ac-Ile in the hairs of HV and DP were determined. When comparing the concentrations between DP and those from HV, a statistically significant correlation was observed for the Ac-Leu (p<0.001) and Ac-Ile (p<0.01)., Conclusions: The proposed method is useful for the determination of Ac-Leu and Ac-Ile in the hairs of DP and HV. Human hair may serve as a noninvasive biosample for the diagnosis of diabetes., (Crown Copyright © 2015. Published by Elsevier B.V. All rights reserved.)
- Published
- 2015
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17. Gene network inference and visualization tools for biologists: application to new human transcriptome datasets.
- Author
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Hurley D, Araki H, Tamada Y, Dunmore B, Sanders D, Humphreys S, Affara M, Imoto S, Yasuda K, Tomiyasu Y, Tashiro K, Savoie C, Cho V, Smith S, Kuhara S, Miyano S, Charnock-Jones DS, Crampin EJ, and Print CG
- Subjects
- Cells, Cultured, Computer Graphics, Human Umbilical Vein Endothelial Cells drug effects, Human Umbilical Vein Endothelial Cells metabolism, Humans, NF-kappa B metabolism, NF-kappa B p50 Subunit metabolism, Oligonucleotide Array Sequence Analysis, RNA, Small Interfering, Tumor Necrosis Factor-alpha pharmacology, Gene Expression Profiling, Gene Regulatory Networks, Software
- Abstract
Gene regulatory networks inferred from RNA abundance data have generated significant interest, but despite this, gene network approaches are used infrequently and often require input from bioinformaticians. We have assembled a suite of tools for analysing regulatory networks, and we illustrate their use with microarray datasets generated in human endothelial cells. We infer a range of regulatory networks, and based on this analysis discuss the strengths and limitations of network inference from RNA abundance data. We welcome contact from researchers interested in using our inference and visualization tools to answer biological questions.
- Published
- 2012
- Full Text
- View/download PDF
18. Development of novel active acceptors possessing a positively charged structure for the transglycosylation reaction with Endo-M and their application to oligosaccharide analysis.
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Min JZ, Suzuki Y, Tomiyasu Y, Jin D, Higashi T, Lee YI, and Toyo'oka T
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- Glycosylation, Oligosaccharides analysis, Oligosaccharides metabolism, Ovalbumin chemistry, Ribonucleases chemistry, Tandem Mass Spectrometry methods, Hexosaminidases metabolism, Oligosaccharides chemistry
- Abstract
With Boc-Asn-GlcNAc as a basic structure, four permanently positively charged kinds of new acceptors (GP-Boc-Asn-GlcNAc, GT-Boc-Asn-GlcNAc, HMP-Boc-Asn-GlcNAc, MPDPZ-Boc-Asn-GlcNAc) and five kinds of similar structure acceptors (2-PA-Boc-Asn-GlcNAc, 3-PA-Boc-Asn-GlcNAc, 4-PA-Boc-Asn-GlcNAc, HP-Boc-Asn-GlcNAc, PDPZ-Boc-Asn-GlcNAc) were synthesized as acceptors for the resolution of oligosaccharides in glycopeptides. The synthesized acceptors enzymatically reacted with Disialo-Asn (donor) in the presence of Endo-M. The reaction yields of each transglycosylation product were not obvious, because we do not have all the authentic Disialo-Asn-Boc-acceptors. Therefore, we used the peak area of the transglycosylation product detected by mass spectrometry and evaluated the utility of each acceptor. Among the Boc-Asn-GlcNAc acceptors, the positively charged MPDPZ derivative peak area was the highest, MPDPZ-Boc-Asn-GlcNAc with a positively charged structure showed about a 2.2 times greater sensitivity of the transglycosylation product compared to the conventional fluorescence acceptor DBD-PZ-Boc-Asn-GlcNAc. As a result, the MPDPZ-Boc-Asn-GlcNAc acceptor was suitable for the transglycosylation reaction with Endo-M. The development of a qualitative determination method for the N-linked oligosaccharides in glycoproteins was attempted by combination of the transglycosylation reaction and semi-micro high-performance liquid chromatography/electrospray ionization quadrupole time-of-flight tandem mass spectrometry (HPLC/ESI-QTOF-MS/MS). The asparaginyl-oligosaccharides in glycoproteins, liberated by treatment with Pronase E, were separated, purified and labeled with positively charged MPDPZ. The resulting derivatives were separated by a semi-micro HPLC system. The eluted N-linked oligosaccharide derivatives were then introduced into a QTOF-MS instrument and sensitively detected in the ESI(+) mode. Various fragment ions based on the carbohydrate units appeared in the MS/MS spectra. Among the peaks, m/z 782.37 corresponding to MPDPZ-Boc-Asn-GlcNAc is the most important one for identifying the asparaginyl-oligosaccharides. Disialo-Asn-Boc-MPDPZ was easily identified by the selected-ion chromatogram at m/z 782.37 by MS/MS detection. Therefore, the identification of N-linked oligosaccharides in glycoproteins seems to be possible by the proposed semi-micro HPLC separations followed by the QTOF-MS/MS detection. Furthermore, several oligosaccharides in ovalbumin and ribonuclease B were successfully identified by the proposed procedure., (Copyright © 2011 John Wiley & Sons, Ltd.)
- Published
- 2011
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19. One-pot synthesis of cyclophane-type macrocycles using manganese(III)-mediated oxidative radical cyclization.
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Ito Y, Tomiyasu Y, Kawanabe T, Uemura K, Ushimizu Y, and Nishino H
- Subjects
- Cyclization, Free Radicals chemistry, Models, Molecular, Molecular Structure, Oxidation-Reduction, Ethers, Cyclic chemical synthesis, Macrocyclic Compounds chemical synthesis, Manganese chemistry, Piperidines chemical synthesis
- Abstract
Cyclophane-type macrocyclic compounds from 21 to 56 members having two fused dihydrofuran rings were synthesized by the manganese(III)-mediated oxidation of terminal dienes with bis(3-oxobutanoate)s containing aromatics. The reaction detail, characterization and reaction pathways are described.
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- 2011
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20. Adult-type metachromatic leukodystrophy with compound heterozygous ARSA mutations: a case report and phenotypic comparison with a previously reported case.
- Author
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Hayashi T, Nakamura M, Ichiba M, Matsuda M, Kato M, Shiokawa N, Shimo H, Tomiyasu A, Mori S, Tomiyasu Y, Ishizuka T, Inamori Y, Okamoto Y, Umehara F, Arimura K, Nakabeppu Y, and Sano A
- Subjects
- Adult, Brain pathology, Female, Genetic Association Studies, Heterozygote, Humans, Leukodystrophy, Metachromatic pathology, Magnetic Resonance Imaging, Cerebroside-Sulfatase genetics, Leukodystrophy, Metachromatic genetics, Mutation, Missense genetics
- Abstract
Metachromatic leukodystrophy (MLD) is an autosomal recessive lysosomal storage disease caused by a deficiency of arylsulfatase A. MLD is a heterogeneous disease with variable age at onset and variable clinical features. We evaluated a 33-year-old female patient who developed manifestations of disinhibitory behavior. She was diagnosed with MLD by genetic analysis, which revealed compound heterozygous ARSA missense mutations (p.G99D and p.T409I). The same combination of mutations was previously reported in a Japanese patient with similar symptoms. We performed additional, detailed neuropsychological tests with functional imaging on the current patient that demonstrated frontal lobe dysfunction. These results indicate that the mutations have important implications for genotype-phenotype correlation in MLD., (© 2011 The Authors. Psychiatry and Clinical Neurosciences © 2011 Japanese Society of Psychiatry and Neurology.)
- Published
- 2011
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21. Human primary cultured hepatic stellate cells can be cryopreserved.
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Nakamura A, Ueno T, Yagi Y, Okuda K, Ogata T, Nakamura T, Torimura T, Iwamoto H, Ramadoss S, Sata M, Tsutsumi V, Yasuda K, Tomiyasu Y, Obayashi K, Tashiro K, and Kuhara S
- Subjects
- Aged, Aged, 80 and over, Blotting, Western, Cells, Cultured, Cluster Analysis, Female, Fluorescent Antibody Technique, Gene Expression Regulation, Hepatic Stellate Cells ultrastructure, Humans, Liver cytology, Liver metabolism, Male, RNA, Messenger genetics, RNA, Messenger metabolism, Signal Transduction genetics, Cryopreservation methods, Hepatic Stellate Cells cytology
- Abstract
We compared the morphological and functional characteristics of cultured unfrozen hepatic stellate cells (HSCs) and cryopreserved HSCs obtained from human livers. We used liver tissues obtained by surgical resection from patients with metastatic liver cancer or with hepatocellular carcinoma. HSCs were isolated and allowed to spread in culture. Comparison of morphological and functional features between the unfrozen HSCs and cryopreserved HSCs was performed at each passage using the following techniques: light microscopy, immunohistochemistry, cell growth curve, metallothionein (MTT) assay, and PI staining, Western blot, real-time polymerase chain reaction (PCR), and gene expression analysis using microarrays. The purity of HSCs was more than 90% in all passages. alpha-Smooth muscle actin (SMA-)positive HSCs gradually increased in successive passages, and the positive cell rate and rate of increase in cell number were similar in both groups. Expression of platelet-derived growth factor (PDGF) receptor, transforming growth factor (TGF)-beta receptor, and alpha-SMA mRNAs and protein was similar during each passage in the two groups. Gene expression was nearly identical at each passage in unfrozen and frozen/thawed samples obtained from the same patient. In conclusion, an adequate protocol for the cryopreservation of human primary cultured HSCs could be established.
- Published
- 2010
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22. Analysis of PPARalpha-dependent and PPARalpha-independent transcript regulation following fenofibrate treatment of human endothelial cells.
- Author
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Araki H, Tamada Y, Imoto S, Dunmore B, Sanders D, Humphrey S, Nagasaki M, Doi A, Nakanishi Y, Yasuda K, Tomiyasu Y, Tashiro K, Print C, Charnock-Jones DS, Kuhara S, and Miyano S
- Subjects
- Algorithms, Cells, Cultured, Endothelial Cells metabolism, Gene Expression Profiling, Gene Knockdown Techniques, Growth Differentiation Factor 15 genetics, Growth Differentiation Factor 15 metabolism, Growth Differentiation Factor 15 physiology, Humans, Hypolipidemic Agents pharmacology, Oligonucleotide Array Sequence Analysis, PPAR alpha antagonists & inhibitors, PPAR alpha genetics, RNA, Messenger genetics, RNA, Messenger metabolism, RNA, Small Interfering pharmacology, Signal Transduction drug effects, Signal Transduction genetics, Time Factors, Transcriptional Activation drug effects, Endothelial Cells drug effects, Fenofibrate pharmacology, Gene Expression Regulation drug effects, PPAR alpha physiology
- Abstract
Fenofibrate is a synthetic ligand for the nuclear receptor peroxisome proliferator-activated receptor (PPAR) alpha and has been widely used in the treatment of metabolic disorders, especially hyperlipemia, due to its lipid-lowering effect. The molecular mechanism of lipid-lowering is relatively well defined: an activated PPARalpha forms a PPAR-RXR heterodimer and this regulates the transcription of genes involved in energy metabolism by binding to PPAR response elements in their promoter regions, so-called "trans-activation". In addition, fenofibrate also has anti-inflammatory and anti-athrogenic effects in vascular endothelial and smooth muscle cells. We have limited information about the anti-inflammatory mechanism of fenofibrate; however, "trans-repression" which suppresses production of inflammatory cytokines and adhesion molecules probably contributes to this mechanism. Furthermore, there are reports that fenofibrate affects endothelial cells in a PPARalpha-independent manner. In order to identify PPARalpha-dependently and PPARalpha-independently regulated transcripts, we generated microarray data from human endothelial cells treated with fenofibrate, and with and without siRNA-mediated knock-down of PPARalpha. We also constructed dynamic Bayesian transcriptome networks to reveal PPARalpha-dependent and -independent pathways. Our transcriptome network analysis identified growth differentiation factor 15 (GDF15) as a hub gene having PPARalpha-independently regulated transcripts as its direct downstream children. This result suggests that GDF15 may be PPARalpha-independent master-regulator of fenofibrate action in human endothelial cells.
- Published
- 2009
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23. Unraveling dynamic activities of autocrine pathways that control drug-response transcriptome networks.
- Author
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Tamada Y, Araki H, Imoto S, Nagasaki M, Doi A, Nakanishi Y, Tomiyasu Y, Yasuda K, Dunmore B, Sanders D, Humphreys S, Print C, Charnock-Jones DS, Tashiro K, Kuhara S, and Miyano S
- Subjects
- Bayes Theorem, Biometry, Cells, Cultured, Databases, Factual, Databases, Genetic, Fenofibrate pharmacology, Gene Regulatory Networks, Humans, Hypolipidemic Agents pharmacology, Models, Biological, Oligonucleotide Array Sequence Analysis statistics & numerical data, PPAR alpha agonists, PPAR alpha genetics, Pharmacogenetics statistics & numerical data, Protein Interaction Mapping statistics & numerical data, Autocrine Communication drug effects, Autocrine Communication genetics, Gene Expression Profiling statistics & numerical data
- Abstract
Some drugs affect secretion of secreted proteins (e.g. cytokines) released from target cells, but it remains unclear whether these proteins act in an autocrine manner and directly effect the cells on which the drugs act. In this study, we propose a computational method for testing a biological hypothesis: there exist autocrine signaling pathways that are dynamically regulated by drug response transcriptome networks and control them simultaneously. If such pathways are identified, they could be useful for revealing drug mode-of-action and identifying novel drug targets. By the node-set separation method proposed, dynamic structural changes can be embedded in transcriptome networks that enable us to find master-regulator genes or critical paths at each observed time. We then combine the protein-protein interaction network with the estimated dynamic transcriptome network to discover drug-affected autocrine pathways if they exist. The statistical significance (p-values) of the pathways are evaluated by the meta-analysis technique. The dynamics of the interactions between the transcriptome networks and the signaling pathways will be shown in this framework. We illustrate our strategy by an application using anti-hyperlipidemia drug, Fenofibrate. From over one million protein-protein interaction pathways, we extracted significant 23 autocrine-like pathways with the Bonferroni correction, including VEGF-NRP1-GIPC1-PRKCA-PPARalpha, that is one of the most significant ones and contains PPARalpha, a target of Fenofibrate.
- Published
- 2009
24. The in-vivo effect of bakumondo-to (TJ-29), a traditional Japanese medicine used for treatment of chronic airway disease, on cytochrome P450 1A2, xanthine oxidase and N-acetyltransferase 2 activity in man.
- Author
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Saruwatari J, Hisaeda S, Higa Y, Tomiyasu Y, Nakagawa K, and Ishizaki T
- Subjects
- Adult, Analysis of Variance, Arylamine N-Acetyltransferase antagonists & inhibitors, Cross-Over Studies, Cytochrome P-450 CYP1A2 Inhibitors, Double-Blind Method, Drugs, Chinese Herbal pharmacology, Drugs, Chinese Herbal therapeutic use, Enzyme Inhibitors metabolism, Enzyme Inhibitors pharmacology, Enzyme Inhibitors therapeutic use, Female, Humans, Japan, Male, Plant Extracts metabolism, Plant Extracts pharmacology, Plant Extracts therapeutic use, Pulmonary Disease, Chronic Obstructive drug therapy, Xanthine Oxidase antagonists & inhibitors, Arylamine N-Acetyltransferase metabolism, Cytochrome P-450 CYP1A2 metabolism, Drugs, Chinese Herbal metabolism, Medicine, East Asian Traditional, Pulmonary Disease, Chronic Obstructive enzymology, Xanthine Oxidase metabolism
- Abstract
In Japan, patients with chronic airway disease are administered bakumondo-to (TJ-29), a mixture of six herbal components. We have assessed the effects of TJ-29 on the activities of cytochrome P450 (CYP) 1A2, xanthine oxidase and N-acetyltransferase 2 in 26 healthy subjects under a double-blind, randomized, placebo-controlled cross-over study design. The baseline activities of the three enzymes were assessed by the respective urinary metabolic ratios of an 8-h urine sample after an oral 150-mg dose of caffeine. Thereafter, the subjects received a thrice-daily 3.0-g dose of TJ-29 or placebo for seven days, and underwent the same caffeine test on the post-dose days 1 and 7. No statistically significant difference was observed in the activity of the three enzymes between those at baseline, and on day 1 after dosing with TJ-29 or placebo. The mean activity of CYP1A2, xanthine oxidase and N-acetyltransferase 2 tended to be lower on day 7 after dosing with TJ-29 compared with those at baseline and on day 7 after dosing with placebo. However, these changes were not statistically significant in CYP1A2 (P = 0.120), xanthine oxidase (P = 0.123) or N-acetyltransferase 2 (P = 0.056). In conclusion, TJ-29 did not appear to substantially affect the activity of CYP1A2, xanthine oxidase or N-acetyltransferase 2 in man.
- Published
- 2004
- Full Text
- View/download PDF
25. Effects of nonylphenol and phytoestrogen-enriched diet on plasma vitellogenin, steroid hormone, hepatic cytochrome P450 1A, and glutathione-S-transferase values in goldfish (Carassius auratus).
- Author
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Ishibashi H, Tachibana K, Tsuchimoto M, Soyano K, Tatarazako N, Matsumura N, Tomiyasu Y, Tominaga N, and Arizono K
- Subjects
- Animals, Cytochrome P-450 CYP1A1 metabolism, Diet, Dose-Response Relationship, Drug, Glutathione Transferase metabolism, Male, Phytoestrogens, Goldfish blood, Gonadal Steroid Hormones blood, Hepatopancreas drug effects, Hepatopancreas enzymology, Isoflavones administration & dosage, Phenols administration & dosage, Plant Preparations administration & dosage, Vitellogenins blood
- Abstract
The effects of nonylphenol (NP) on plasma vitellogenin (VTG) and steroid hormone values, as well as hepatic cytochrome P450 1A (CYP1A) and glutathione-S-transferase (GST) activities, were measured in goldfish (Carassius auratus) fed a diet with a low (formulated diet, FD) or high (commercial diet, CD) content of phytoestrogens, including genistein and daidzein. Male goldfish with secondary sexual characteristics were exposed to nominal NP concentrations of 0.1, 1.0, 10, and 100 microg/L in the water for 28 days while being fed either the FD or CD diet at 1.0% of body weight daily. Plasma VTG concentration in male goldfish exposed to 100 microg of NP/L and fed FD was significantly higher than that in the FD-fed control fish at seven, 21, and 28 days. However, fish of the CD-fed group exposed to 100 microg of NP/ L had significantly higher plasma VTG concentration than did fish of the CD-fed control group at 28 days only. Moreover, plasma VTG concentration in fish of the CD-fed control group was about 100-fold higher than that in fish of the FD-fed control group. Although the estrogenic effects of a phytoestrogen-enriched diet caused a decrease in testosterone and/or 11-ketotestosterone values in the CD-fed fish, there was no dose-response relationship between androgen and amount of NP to which the FD-fed fish were exposed. Nonylphenol does not have appreciable effects on hepatic CYP1A and GST activities in male goldfish at concentrations as low as 100 microg/L. These results suggest that NP has estrogenic activity in male goldfish at the nominal concentration of 100 microg/L, and that phytoestrogens, such as genistein and daidzein, in the CD inhibit an aspect(s) of steroid release and/or synthesis common to testosterone and 11-ketotestosterone. However, results of in vivo screening assays for endocrine-disrupting chemicals may be seriously affected by phytoestrogens in the diet, depending on content or potency of estrogenic activity; therefore, we recommend use in research of a standardized, open-formula diet in which estrogenic substances have been reduced to amounts that do not alter the results of studies that are influenced by exogenous estrogens.
- Published
- 2004
26. Genome sequence of an M3 strain of Streptococcus pyogenes reveals a large-scale genomic rearrangement in invasive strains and new insights into phage evolution.
- Author
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Nakagawa I, Kurokawa K, Yamashita A, Nakata M, Tomiyasu Y, Okahashi N, Kawabata S, Yamazaki K, Shiba T, Yasunaga T, Hayashi H, Hattori M, and Hamada S
- Subjects
- Attachment Sites, Microbiological genetics, Bacterial Proteins genetics, Chromosome Inversion, Chromosome Mapping, Chromosomes, Bacterial genetics, Genes, Bacterial genetics, Genes, Viral genetics, Genes, rRNA genetics, Molecular Sequence Data, Species Specificity, Streptococcal Infections genetics, Streptococcal Infections microbiology, Transcription Factors genetics, Viral Structural Proteins genetics, Evolution, Molecular, Genome, Bacterial, Recombination, Genetic genetics, Streptococcus Phages genetics, Streptococcus pyogenes genetics, Streptococcus pyogenes pathogenicity, Virulence genetics
- Abstract
Group Astreptococcus (GAS) is a gram-positive bacterial pathogen that causes various suppurative infections and nonsuppurative sequelae. Since the late 1980s, streptococcal toxic-shock like syndrome (STSS) and severe invasive GAS infections have been reported globally. Here we sequenced the genome of serotype M3 strain SSI-1, isolated from an STSS patient in Japan, and compared it with those of other GAS strains. The SSI-1 genome is composed of 1,884,275 bp, and 1.7 Mb of the sequence is highly conserved relative to strain SF370 (serotype M1) and MGAS8232 (serotype M18), and almost completely conserved relative to strain MGAS315 (serotype M3). However, a large genomic rearrangement has been shown to occur across the replication axis between the homologous rrn-comX1 regions and between two prophage-coding regions across the replication axis. Atotal of 1 Mb of chromosomal DNA is inverted across the replication axis. Interestingly, the recombinations between the prophage regions are within the phage genes, and the genes encoding superantigens and mitogenic factors are interchanged between two prophages. This genomic rearrangement occurs in 65% of clinical isolates (64/94) collected after 1990, whereas it is found in only 25% of clinical isolates (7/28) collected before 1985. These observations indicate that streptococcal phages represent important plasticity regions in the GAS chromosome where recombination between homologous phage genes can occur and result not only in new phage derivatives, but also in large chromosomal rearrangements.
- Published
- 2003
- Full Text
- View/download PDF
27. Determinants of infants' understanding of supporting relations: amount of contact versus position of the center of gravity.
- Author
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Dan N, Omori T, and Tomiyasu Y
- Subjects
- Humans, Infant, Child Development, Cognition physiology, Concept Formation, Gravitation
- Abstract
This study investigated the developmental age at which infants recognize about supporting relations between objects and what information they use to judge whether a supported object will fall down or not. Four kinds of events were used. All events involved support in relation of two boxes, which differed in the amount of contact between objects and the amount of discrepancy between the supported object's position and its most balanced position. 115 infants (3 to 13 mo.) saw 4 events which differed on these two variables. Infants 10 months and older looked longer at the event in which the center of a supported box was just outside of the edge of a supporting box, that is, a support relation in which it was difficult to anticipate whether the box would fall down or not. Analysis suggested that infants' attention is not determined by only one simple stimulus variable but by more complicated variables (such as uncertainty of prediction).
- Published
- 2001
- Full Text
- View/download PDF
28. Child-environment relationships: a cross-cultural study of educable mentally retarded children and their families.
- Author
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Nihira K, Webster R, Tomiyasu Y, and Oshio C
- Subjects
- Activities of Daily Living, Affect, Child, Child Behavior Disorders psychology, Child Development, Cognition, Female, Humans, Japan, Male, Social Adjustment, United States, Cross-Cultural Comparison, Environment, Family, Intellectual Disability psychology
- Abstract
A cross-cultural study was conducted to determine the generality of child-environment relationships in Japanese and American families with educable mentally retarded (EMR) children. A total of 90 families with EMR children in Japan and 93 families with EMR children in America participated. The Henderson Environment Learning and Process Scale, Family Environment Scale, and Home Quality Rating Scale were employed in home interviews and observations. The AAMD Adaptive Behavior Scale was used to measure social competency and psychosocial adjustment of the children. The results indicated that the relation between cognitive opportunities at home and the child's social competency appeared similar between the two cultures. However, the relation between the affective aspects of home environment and the child's psychosocial adjustment appeared to differ between the two cultures.
- Published
- 1988
- Full Text
- View/download PDF
29. Homes of TMR children: comparison between American and Japanese families.
- Author
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Nihira K, Tomiyasu Y, and Oshio C
- Subjects
- Adolescent, Child, Child Development, Humans, Japan, Psychological Tests, Social Adjustment, United States, Cross-Cultural Comparison, Education of Intellectually Disabled, Parent-Child Relations, Social Environment
- Abstract
A cross-cultural study was conducted to examine the extent to which certain environment-child development relationships can be generalized across two cultures. Participants were 103 trainable mentally retarded (TMR) children and their families in Japan and 88 TMR children and their families in the United States. The relation between cognitive stimulation and cultural opportunities at home and the children's social competence appeared to generalize across both cultures; however, the relation between affective and emotional aspects of parental behavior and the children's emotional adjustment appeared to be culture-specific. The cross-cultural difference in home environment was interpreted in terms of qualitative difference in parental values and expectations regarding the children's behavior.
- Published
- 1987
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