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131.
Thyroid hormone receptor interacting protein 3 (trip3) is a novel coactivator of hepatocyte nuclear factor-4alpha 总被引:4,自引:0,他引:4
132.
Murai S Saito H Shirato R Tamura H Yamada A Kato H 《Journal of pharmacological and toxicological methods》2004,50(3):223-229
Introduction: To measure levels of phosphatidylcholine (PtdCh) in various mouse tissues, we developed a rapid and precise method using high-performance liquid chromatography (HPLC) with electrochemical detection (ECD) and an immobilized enzyme column. To generate an example data set, the effect of methoxamine (an 1-adrenergic agonist) on the PtdCh levels was examined by this method in the artery and the submandibular gland of the mouse in vivo. Methods: Under our modifications of the method of Zapata et al. [J. Neurosci. 18 (1998) 3597], the mixture of lipophilic choline metabolites (PtdCh, lyso-PtdCh, and sphingomyelin) extracted by chloroform from the tissue homogenate was dried without prior separation and hydrolyzed with free choline by a 1-N perchloric acid solution containing ethylhomocholine (an internal standard for choline assay) at 90 °C for 1 h. Subsequently, the hydrolyzed mixture was injected directly into the HPLC system for PtdCh assay. Results: The present method permitted PtdCh assay within 5 min in one chromatographic run. Recovery of an authentic PtdCh sample was 99% (n=10). The within-run coefficients of variation for choline derived from PtdCh in the same tissue samples were 0.6% (n=10) and 1.3% (n=30). Under the present method, the lowest and highest PtdCh values in tissue samples were about 2 μmol/g (eye ball) and 29 μmol/g (spinal cord), respectively. Methoxamine significantly decreased PtdCh levels and increased free choline levels in mouse artery and submandibular gland. Discussion: Under the present sample processing procedure, the choline values originating from lyso-PtdCh and sphingomyelin were much less than those originating from PtdCh hydrolysis. Thus, it was possible to inject the hydrolyzed mixture directly into the HPLC system for PtdCh assay. Since the present method provides simple, rapid, and highly reliable PtdCh determination, it is suitable for routine assay of PtdCh in a large number of samples. 相似文献
133.
Sixteen flavonoids including quercetin and kaempferol and their relatives were examined for their ability to promote DNA degradation induced by the bleomycin (BLM)-Fe complex. Three hydroxyl groups in the flavonoidal nucleus were proposed as a crucial structural requirement for effectively promoting DNA degradation: 1). the C7-hydroxyl substitution in the A-ring; 2). the C4'-hydroxyl substitution in the B-ring; and 3). the C3-hydroxyl substitution in the C-ring. Flavonoids, which lack even one of these hydroxyl substitutions, showed remarkably diminished activity. There was a good correlation (r=0.920, p<0.001) between activity to promote DNA degradation and oxidizability, which was measured following the Fe(III)-induced oxidation of flavonoids themselves, among the 16 flavonoids. The oxidizability of flavonoids which have the crucial hydroxyl substitutions, was remarkably enhanced in the presence compared with the absence of BLM. On the other hand, the extent of oxidation of flavonoids lacking these substitutions was enhanced little or not at all by BLM. No correlation between the Fe(III)-reducing activity and DNA degradation-promoting activity was found among flavonoids satisfying the crucial structural requirements. Furthermore, the correlation between the extent of oxidation of flavonoids and the Fe(III)-reducing activity was not confirmed among these flavonoids. Therefore, it was suggested that Fe(III)-reducing activity was not the only factor determining DNA degradation-promoting activity in flavonoids having the three hydroxyl groups necessary for effectively promoting DNA degradation induced by BLM-Fe complex. 相似文献
134.
Acute respiratory distress syndrome induced by rifampicin with high levels of neutrophil and eosinophil products in bronchoalveolar lavage fluid 总被引:1,自引:0,他引:1
Ashitani J Yanagi S Arimura Y Sano A Mukae H 《Respiration; international review of thoracic diseases》2003,70(5):541-543
We reported a case with acute respiratory distress syndrome (ARDS) caused by rifampicin during therapy for pulmonary tuberculosis. A high level of eosinophil cationic protein in bronchoalveolar lavage fluid (BALF) was detected as well as interleukin-8 and neutrophil elastase. Based on these results together with the positive result of the drug lymphocyte-stimulating test, we concluded that rifampicin was the causative drug leading to ARDS. Corticosteroid therapy resulted in clinical improvement and resolution of the pulmonary infiltrates on the chest radiograph without the recurrence of pulmonary tuberculosis. 相似文献
135.
Nobuhiko Takahashi Arisa Higa Gen Hiyama Hirosumi Tamura Hirotaka Hoshi Yuu Dobashi Kiyoaki Katahira Hiroya Ishihara Kosuke Takagi Kazuhito Goda Naoyuki Okabe Satoshi Muto Hiroyuki Suzuki Kenju Shimomura Shinya Watanabe Motoki Takagi 《Oncology Letters》2021,21(5)
An in vitro assay system using patient-derived tumor models represents a promising preclinical cancer model that replicates the disease better than traditional cell culture models. Patient-derived tumor organoid (PDO) and patient-derived tumor xenograft (PDX) models have been previously established from different types of human tumors to recapitulate accurately and efficiently their tissue architecture and function. However, these models have low throughput and are challenging to construct. Thus, the present study aimed to establish a simple in vitro high-throughput assay system using PDO and PDX models. Furthermore, the current study aimed to evaluate different classes of anticancer drugs, including chemotherapeutic, molecular targeted and antibody drugs, using PDO and PDX models. First, an in vitro high-throughput assay system was constructed using PDO and PDX established from solid and hematopoietic tumors cultured in 384-well plates to evaluate anticancer agents. In addition, an in vitro evaluation system of the immune response was developed using PDO and PDX. Novel cancer immunotherapeutic agents with marked efficacy have been used against various types of tumor. Thus, there is an urgent need for in vitro functional potency assays that can simulate the complex interaction of immune cells with tumor cells and can rapidly test the efficacy of different immunotherapies or antibody drugs. An evaluation system for the antibody-dependent cellular cytotoxic activity of anti-epidermal growth factor receptor antibody and the cytotoxic activity of activated lymphocytes, such as cytotoxic T lymphocytes and natural killer cells, was constructed. Moreover, immune response assay systems with bispecific T-cell engagers were developed using effector cells. The present results demonstrated that in vitro assay systems using PDO and PDX may be suitable for evaluating anticancer agents and immunotherapy potency with high reproducibility and simplicity. 相似文献
136.
Kazutoyo Osoegawa Tamara A. Vayntrub Sabine Wenda Dianne De Santis Konstantinos Barsakis Milena Ivanova Susan Hsu Jonathan Barone Rhonda Holdsworth Mary Diviney Medhat Askar Amanda Willis Dawn Railton Sophie Laflin Ketevan Gendzekhadze Arisa Oki Nicoletta Sacchi Michela Mazzocco Marcelo A. Fernandez-Viña 《Human immunology》2019,80(4):228-236
The 17th International HLA and Immunogenetics Workshop (IHIW) organizers conducted a Pilot Study (PS) in which 13 laboratories (15 groups) participated to assess the performance of the various sequencing library preparation protocols, NGS platforms and software in use prior to the workshop. The organizers sent 50 cell lines to each of the 15 groups, scored the 15 independently generated sets of NGS HLA genotyping data, and generated “consensus” HLA genotypes for each of the 50 cell lines. Proficiency Testing (PT) was subsequently organized using four sets of 24 cell lines, selected from 48 of 50 PS cell lines, to validate the quality of NGS HLA typing data from the 34 participating IHIW laboratories. Completion of the PT program with a minimum score of 95% concordance at the HLA-A, HLA-B, HLA-C, HLA-DRB1 and HLA-DQB1 loci satisfied the requirements to submit NGS HLA typing data for the 17th IHIW projects. Together, these PS and PT efforts constituted the 17th IHIW Quality Control project. Overall PT concordance rates for HLA-A, HLA-B, HLA-C, HLA-DPA1, HLA-DPB1, HLA-DQA1, HLA-DQB1, HLA-DRB1, HLA-DRB3, HLA-DRB4 and HLA-DRB5 were 98.1%, 97.0% and 98.1%, 99.0%, 98.6%, 98.8%, 97.6%, 96.0%, 99.1%, 90.0% and 91.7%, respectively. Across all loci, the majority of the discordance was due to allele dropout. The high cost of NGS HLA genotyping per experiment likely prevented the retyping of initially failed HLA loci. Despite the high HLA genotype concordance rates of the software, there remains room for improvement in the assembly of more accurate consensus DNA sequences by NGS HLA genotyping software. 相似文献
137.
Tomoko Yagi Natsuko Inoue Ayako Yanai Keiko Murase Michiko Imamura Yoshimasa Miyagawa Yukie Enomoto Arisa Nishimukai Yuichi Takatsuka Seiichi Hirota Kouhei Akazawa Yasuo Miyoshi 《Breast cancer (Tokyo, Japan)》2016,23(2):224-230
Background
Indication for chemotherapy in estrogen receptor (ER)-positive and human epidermal growth factor receptor 2 (HER2)-negative breast cancers is determined on the basis of Ki67 expression level. However, since Ki67-high cancers are not necessarily sensitive to chemotherapy, identification of such patients who do not need chemotherapy is an important issue.Patients and methods
We used immunohistochemical staining to examine the expression levels of ER, progesterone receptor (PgR), Ki67, and geminin, a marker of S to G2/M phases, in 80 ER-positive/HER2-negative breast cancers. The labeling indices of Ki67 and geminin were determined and cutoff values were set at 15 and 6 %, respectively.Results
Ki67 and geminin expression levels were significantly associated with nuclear grade. In the Ki67-low subset, 26 out of 28 (92.9 %) cancers were geminin low and in the Ki67-high subset, 31 out of 52 (59.6 %) were geminin high. Distant disease-free survival (DDFS) of the geminin-high subset was significantly poorer than that of the geminin-low subset (P = 0.009). In the Ki67-low subset, only one patient showed recurrence. Metastasis was detected in eight out of 31 (25.8 %) patients in the geminin-high group of the Ki67-high subset, but no recurrence was observed in the geminin-low group of the Ki67-high subset.Conclusion
Geminin-high breast cancers are significantly associated with worse prognosis. Since poorer prognosis was recognized only in the geminin-high group in Ki67-high cancers, we speculate that geminin may be useful for identifying patients in the Ki67-high subset who can avoid unnecessary chemotherapy.138.
Masashi Kusano Arisa Kazui Ryohei Uchida Tatsuo Mae Takayuki Tsuda Yukiyoshi Toritsuka 《Arthroscopy》2018,34(11):3063-3070
139.
Yu Wang Yasushi Adachi Arisa Imsumran Hiroyuki Yamamoto Wenhua Piao Hua Li Masanori Ii Yoshiaki Arimura Mi Young Park Dalrae Kim Choon-Taek Lee David P. Carbone Kohzoh Imai Yasuhisa Shinomura 《Journal of gastroenterology》2010,45(2):159-170