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https://www.readbyqxmd.com/read/27872410/risk-of-mortality-of-catheter-related-bloodstream-infections-caused-by-acinetobacter-species-is-early-removal-of-the-catheters-associated-with-a-better-survival-outcome
#1
Yi Lee, Yi-Tzu Lee, Yung-Chih Wang, Chung-Ting Chen, Jun-Ren Sun, Chang-Pan Liu, Yuan-Meng Liu, Shu-Chen Kuo, Chun-Hsiang Chiu, Ya-Sung Yang, Jung-Chung Lin, Te-Li Chen
PURPOSE: Bloodstream infections (BSIs) caused by Acinetobacter species have been extensively reported, however, which majorly focused on respiratory tract infections. The risk of mortality and the effect of early catheter removal on survival in catheter-related BSIs (CRBSIs) caused by Acinetobacter spp. remain unclear. This study aims to investigate that. METHODS: This is a retrospective multicentric study conducted in Taiwan from 2012 to 2014. Patients with at least 1 positive blood culture and catheter culture for the same Acinetobacter spp...
November 20, 2016: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/27793268/spontaneous-metastases-in-immunocompetent-mice-harboring-a-primary-tumor-driven-by-oncogene-latent-membrane-protein-1-from-epstein-barr-virus
#2
Pu-Yuan Chang, Yenlin Huang, Tzu-Yuan Hung, Kowit-Yu Chong, Yu-Sun Chang, Chuck C-K Chao, Kai-Ping N Chow
BACKGROUND: In vitro and clinical studies suggest that the oncogene LMP1 (latent membrane protein 1) encoded by Epstein-Barr virus (EBV) plays a role in the development of nasopharyngeal carcinoma (NPC) and the formation of metastases in immunocompetent individuals. However, whether LMP1 itself is sufficient to drive these events in immunocompetent hosts remains elusive due to the lack of appropriate experimental models. The aim of this study was to study LMP1-dependent tumorigenesis and metastasis in BALB/c mice inoculated with BALB/c-3T3 cells expressing N-LMP1 (a Taiwanese NPC variant)...
August 2016: Biomedical Journal
https://www.readbyqxmd.com/read/27758765/amp-activated-protein-kinase-and-sirtuin-1-coregulation-of-cortactin-contributes-to-endothelial-function
#3
Tzu-Pin Shentu, Ming He, Xiaoli Sun, Jianlin Zhang, Fan Zhang, Brendan Gongol, Traci L Marin, Jiao Zhang, Liang Wen, Yinsheng Wang, Gregory G Geary, Yi Zhu, David A Johnson, John Y-J Shyy
OBJECTIVE: Cortactin translocates to the cell periphery in vascular endothelial cells (ECs) on cortical-actin assembly in response to pulsatile shear stress. Because cortactin has putative sites for AMP-activated protein kinase (AMPK) phosphorylation and sirtuin 1 (SIRT1) deacetylation, we examined the hypothesis that AMPK and SIRT1 coregulate cortactin dynamics in response to shear stress. APPROACH AND RESULTS: Analysis of the ability of AMPK to phosphorylate recombinant cortactin and oligopeptides whose sequences matched AMPK consensus sequences in cortactin pointed to Thr-401 as the site of AMPK phosphorylation...
October 6, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/27738429/mixed-infections-of-helicobacter-pylori-isolated-from-patients-with-gastrointestinal-diseases-in-taiwan
#4
Chih-Ho Lai, Ju-Chun Huang, Chuan Chiang-Ni, Ju-Pi Li, Lii-Tzu Wu, Hua-Shan Wu, Yu-Chen Sun, Mei-Ling Lin, Ju-Fang Lee, Hwai-Jeng Lin
Background. Persistent Helicobacter pylori infection may induce several upper gastrointestinal diseases. Two major virulence factors of H. pylori, vacuolating cytotoxin A (VacA) and cytotoxin-associated gene A (CagA), are thought to be associated with the severity of disease progression. The distribution of vacA and cag-pathogenicity island (cag-PAI) alleles varies in H. pylori isolated from patients in different geographic regions. Aim. To assess the association between mixed infection of H. pylori clinical isolates from Taiwanese patients and the severity of gastrointestinal diseases...
2016: Gastroenterology Research and Practice
https://www.readbyqxmd.com/read/27663741/saliva-protein-biomarkers-to-detect-oral-squamous-cell-carcinoma-in-a-high-risk-population-in-taiwan
#5
Jau-Song Yu, Yi-Ting Chen, Wei-Fan Chiang, Yung-Chin Hsiao, Lichieh Julie Chu, Lai-Chu See, Chi-Sheng Wu, Hui-Tzu Tu, Hsiao-Wei Chen, Chia-Chun Chen, Wei-Chao Liao, Ya-Ting Chang, Chih-Ching Wu, Che-Yi Lin, Shyun-Yeu Liu, Shu-Ti Chiou, Shu-Li Chia, Kai-Ping Chang, Chih-Yen Chien, Su-Wei Chang, Chee-Jen Chang, John D Young, Chia C Pao, Yu-Sun Chang, Leland H Hartwell
Most cases of oral squamous cell carcinoma (OSCC) develop from visible oral potentially malignant disorders (OPMDs). The latter exhibit heterogeneous subtypes with different transformation potentials, complicating the early detection of OSCC during routine visual oral cancer screenings. To develop clinically applicable biomarkers, we collected saliva samples from 96 healthy controls, 103 low-risk OPMDs, 130 high-risk OPMDs, and 131 OSCC subjects. These individuals were enrolled in Taiwan's Oral Cancer Screening Program...
October 11, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27586481/computerized-breast-cancer-analysis-system-using-three-stage-semi-supervised-learning-method
#6
Wenqing Sun, Tzu-Liang Bill Tseng, Jianying Zhang, Wei Qian
BACKGROUND AND OBJECTIVE: A large number of labeled medical image data is usually a requirement to train a well-performed computer-aided detection (CAD) system. But the process of data labeling is time consuming, and potential ethical and logistical problems may also present complications. As a result, incorporating unlabeled data into CAD system can be a feasible way to combat these obstacles. METHODS: In this study we developed a three stage semi-supervised learning (SSL) scheme that combines a small amount of labeled data and larger amount of unlabeled data...
October 2016: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/27584698/designing-microfluidic-devices-for-studying-cellular-responses-under-single-or-coexisting-chemical-electrical-shear-stress-stimuli
#7
Tzu-Yuan Chou, Yung-Shin Sun, Hsien-San Hou, Shang-Ying Wu, Yun Zhu, Ji-Yen Cheng, Kai-Yin Lo
Microfluidic devices are capable of creating a precise and controllable cellular micro-environment of pH, temperature, salt concentration, and other physical or chemical stimuli. They have been commonly used for in vitro cell studies by providing in vivo like surroundings. Especially, how cells response to chemical gradients, electrical fields, and shear stresses has drawn many interests since these phenomena are important in understanding cellular properties and functions. These microfluidic chips can be made of glass substrates, silicon wafers, polydimethylsiloxane (PDMS) polymers, polymethylmethacrylate (PMMA) substrates, or polyethyleneterephthalate (PET) substrates...
2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27475279/enhancing-deep-convolutional-neural-network-scheme-for-breast-cancer-diagnosis-with-unlabeled-data
#8
Wenqing Sun, Tzu-Liang Bill Tseng, Jianying Zhang, Wei Qian
In this study we developed a graph based semi-supervised learning (SSL) scheme using deep convolutional neural network (CNN) for breast cancer diagnosis. CNN usually needs a large amount of labeled data for training and fine tuning the parameters, and our proposed scheme only requires a small portion of labeled data in training set. Four modules were included in the diagnosis system: data weighing, feature selection, dividing co-training data labeling, and CNN. 3158 region of interests (ROIs) with each containing a mass extracted from 1874 pairs of mammogram images were used for this study...
July 19, 2016: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/27410741/mode-of-action-of-antimicrobial-peptides-on-e-%C3%A2-coli-spheroplasts
#9
Yen Sun, Tzu-Lin Sun, Huey W Huang
We investigated the phenomena of antimicrobial peptides (AMPs) directly attacking the cytoplasmic membranes of Escherichia coli spheroplasts. We developed a procedure for fluorescence recovery after photobleaching to examine dye leakage through bacterial membranes as AMPs in solution bound to the membranes. We found that the AMP binding did not increase the apparent membrane area of a spheroplast, contrary to the response of a lipid-bilayer vesicle, which always showed a membrane area expansion by AMP binding...
July 12, 2016: Biophysical Journal
https://www.readbyqxmd.com/read/27301176/targeted-delivery-of-hyaluronan-immobilized-magnetic-ceramic-nanocrystals
#10
Hsi-Chin Wu, Tzu-Wei Wang, Shun-Yu Hsieh, Jui-Sheng Sun, Pei-Leun Kang
Effective cancer therapy relies on delivering the therapeutic agent precisely to the target site to improve the treatment outcome and to minimize side effects. Although surgery, chemotherapy, and radiotherapy are the standard methods commonly used in clinics, hyperthermia has been developed as a new and promising strategy for cancer therapy. In this study, magnetic bioceramic hydroxyapatite (mHAP) nanocrystals have been developed as heat mediator for intracellular hyperthermia. Hyaluronic acid (HA) modified mHAP nanocrystals are synthesized by a wet chemical precipitation process to achieve active targeting...
January 2016: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/27297979/tnf-%C3%AE-augments-cxcr2-and-cxcr3-to-promote-progression-of-renal-cell-carcinoma
#11
Kuang-Hui Sun, Guang-Huan Sun, Yi-Ching Wu, Bai-Jiun Ko, Hui-Tzu Hsu, Sheng-Tang Wu
Within the tumour microenvironment, a complex network of chemokines and their receptors affects the initiation and progression of tumours. The higher levels of tumour necrosis factor-alpha (TNF-α) are associated with tumour progression and an anti-TNF-α monoclonal antibody has been used successfully to treat patients with renal cell carcinoma (RCC). However, the role of chemokines and their receptors in the TNF-α-promoted progression of RCC remains unclear. In this study, TNF-α was found to enhance the migration, invasion and epithelial-mesenchymal transition (EMT) of RCC cells...
June 14, 2016: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/27232384/enzyme-immobilized-3d-printed-reactors-for-online-monitoring-of-rat-brain-extracellular-glucose-and-lactate
#12
Cheng-Kuan Su, Shuo-Chih Yen, Tzu-Wen Li, Yuh-Chang Sun
In this study we constructed a highly sensitive system for in vivo monitoring of the concentrations of rat brain extracellular glucose and lactate. This system involved microdialysis (MD) sampling and fluorescence determination in conjunction with a novel sample derivatization scheme in which glucose oxidase and lactate oxidase were immobilized in ABS flow bioreactors (manufactured through low-cost three-dimensional printing (3DP)), via fused deposition modeling, for online oxidization of sampled glucose and lactate, respectively, in rat brain microdialysate...
June 21, 2016: Analytical Chemistry
https://www.readbyqxmd.com/read/27219669/gas-phase-synthesis-of-1-silacyclopenta-2-4-diene
#13
Tao Yang, Beni B Dangi, Aaron M Thomas, Bing-Jian Sun, Tzu-Jung Chou, Agnes H H Chang, Ralf I Kaiser
Silole (1-silacyclopenta-2,4-diene) was synthesized for the first time by the bimolecular reaction of the simplest silicon-bearing radical, silylidyne (SiH), with 1,3-butadiene (C4 H6 ) in the gas phase under single-collision conditions. The absence of consecutive collisions of the primary reaction product prevents successive reactions of the silole by Diels-Alder dimerization, thus enabling the clean gas-phase synthesis of this hitherto elusive cyclic species from acyclic precursors in a single-collision event...
July 4, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27173809/association-between-fluid-intake-and-kidney-function-and-survival-outcomes-analysis-a-nationwide-population-based-study
#14
Li-Wei Wu, Wei-Liang Chen, Fang-Yih Liaw, Yu-Shan Sun, Hui-Fang Yang, Chung-Ching Wang, Chien-Ming Lin, Yu-Tzu Tsao
OBJECTIVES: Fluid intake, one of the most common daily activities, has not been well studied in chronic kidney disease (CKD) populations, and clinical outcomes are rarely addressed. The aim of this nationwide study is to explore the influence of daily fluid intake on cardiovascular and all-cause mortality and its association with renal function. DESIGN: Observational cohort study. PARTICIPANTS: In all, 2182 participants aged more than 20 years participated in the Third National Health and Nutrition Examination Survey (1988-1994)...
2016: BMJ Open
https://www.readbyqxmd.com/read/27126886/the-effect-of-glycemic-status-on-kidney-stone-disease-in-patients-with-prediabetes
#15
Tzu Hsien Lien, Jin Shang Wu, Yi Ching Yang, Zih Jie Sun, Chih Jen Chang
BACKGROUND: While the evidence supporting a positive association between diabetes mellitus and kidney stone disease (KSD) is solid, studies examining the association between impaired fasting glucose (IFG) and KSD show inconsistent results. Currently, there are no studies examining the relationship between impaired glucose tolerance (IGT) and KSD. The objective of this study is to investigate the effects of different glycemic statuses on KSD. The results may help to motivate patients with diabetes to conform to treatment regimens...
April 2016: Diabetes & Metabolism Journal
https://www.readbyqxmd.com/read/27077114/an-eighteen-gene-classifier-predicts-locoregional-recurrence-in-post-mastectomy-breast-cancer-patients
#16
Skye H Cheng, Chen-Fang Horng, Tzu-Ting Huang, Erich S Huang, Mei-Hua Tsou, Li-Sun Shi, Ben-Long Yu, Chii-Ming Chen, Andrew T Huang
We previously identified 34 genes of interest (GOI) in 2006 to aid the oncologists to determine whether post-mastectomy radiotherapy (PMRT) is indicated for certain patients with breast cancer. At this time, an independent cohort of 135 patients having DNA microarray study available from the primary tumor tissue samples was chosen. Inclusion criteria were 1) mastectomy as the first treatment, 2) pathology stages I-III, 3) any locoregional recurrence (LRR) and 4) no PMRT. After inter-platform data integration of Affymetrix U95 and U133 Plus 2...
March 2016: EBioMedicine
https://www.readbyqxmd.com/read/26919761/discovery-of-glun2a-selective-nmda-receptor-positive-allosteric-modulators-pams-tuning-deactivation-kinetics-via-structure-based-design
#17
Matthew Volgraf, Benjamin D Sellers, Yu Jiang, Guosheng Wu, Cuong Q Ly, Elisia Villemure, Richard M Pastor, Po-wai Yuen, Aijun Lu, Xifeng Luo, Mingcui Liu, Shun Zhang, Liang Sun, Yuhong Fu, Patrick J Lupardus, Heidi J A Wallweber, Bianca M Liederer, Gauri Deshmukh, Emile Plise, Suzanne Tay, Paul Reynen, James Herrington, Amy Gustafson, Yichin Liu, Akim Dirksen, Matthias G A Dietz, Yanzhou Liu, Tzu-Ming Wang, Jesse E Hanson, David Hackos, Kimberly Scearce-Levie, Jacob B Schwarz
The N-methyl-D-aspartate receptor (NMDAR) is a Na(+) and Ca(2+) permeable ionotropic glutamate receptor that is activated by the coagonists glycine and glutamate. NMDARs are critical to synaptic signaling and plasticity, and their dysfunction has been implicated in a number of neurological disorders, including schizophrenia, depression, and Alzheimer's disease. Herein we describe the discovery of potent GluN2A-selective NMDAR positive allosteric modulators (PAMs) starting from a high-throughput screening hit...
March 24, 2016: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/26898884/msi2-is-required-for-maintaining-activated-myelodysplastic-syndrome-stem-cells
#18
James Taggart, Tzu-Chieh Ho, Elianna Amin, Haiming Xu, Trevor S Barlowe, Alexendar R Perez, Benjamin H Durham, Patrick Tivnan, Rachel Okabe, Arthur Chow, Ly Vu, Sun Mi Park, Camila Prieto, Christopher Famulare, Minal Patel, Christopher J Lengner, Amit Verma, Gail Roboz, Monica Guzman, Virginia M Klimek, Omar Abdel-Wahab, Christina Leslie, Stephen D Nimer, Michael G Kharas
Myelodysplastic syndromes (MDS) are driven by complex genetic and epigenetic alterations. The MSI2 RNA-binding protein has been demonstrated to have a role in acute myeloid leukaemia and stem cell function, but its role in MDS is unknown. Here, we demonstrate that elevated MSI2 expression correlates with poor survival in MDS. Conditional deletion of Msi2 in a mouse model of MDS results in a rapid loss of MDS haematopoietic stem and progenitor cells (HSPCs) and reverses the clinical features of MDS. Inversely, inducible overexpression of MSI2 drives myeloid disease progression...
February 22, 2016: Nature Communications
https://www.readbyqxmd.com/read/26794030/prolonged-postprocedural-outbreak-of-mycobacterium-massiliense-infections-associated-with-ultrasound-transmission-gel
#19
A Cheng, W-H Sheng, Y-C Huang, H-Y Sun, Y-T Tsai, M-L Chen, Y-C Liu, Y-C Chuang, S-C Huang, C-I Chang, L-Y Chang, W-C Huang, P-R Hsueh, C-C Hung, Y-C Chen, S-C Chang
Postprocedural infections by Mycobacterium abscessus complex are increasing worldwide, and the source and route of transmission are infrequently identified. Here the extension of a previous clustering of paediatric patients with surgical site infections due to a single strain of the subspecies M. massiliense is reported. The investigation was conducted at a 2200-bed teaching hospital in Taiwan and included microbial surveillance of the environment (water, air, equipment and supplies) and a case-control study...
April 2016: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/26791605/practical-guidelines-and-consideration-of-using-rrhp-for-5hmc-detection
#20
Xueguang Sun, Tzu Hung Chung, Darany Tan, Angela Kim
5-hydroxymethylcytosine (5hmC) is an epigenetic modification, which has been associated with gene expression in many biological contexts. Reduced representation hydroxymethylation profiling was developed as an enzymatic-based method for genome-wide 5hmC detection. It exploits β-glucosyltransferase to inhibit enzymatic cleavage of adapters ligated to a genomic library, allowing only fragments with glucosylated 5hmC residues at adapter junctions to be amplified and sequenced. The simple workflow and high sensitivity make it an efficient assay for 5hmC mapping...
February 2016: Epigenomics
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