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https://www.readbyqxmd.com/read/28622093/suppressive-effect-of-dengue-virus-envelope-protein-domain-iii-on-megakaryopoiesis
#1
Guan-Ling Lin, Hsin-Hou Chang, Te-Sheng Lien, Po-Kong Chen, Hao Chan, Mei-Tzu Su, Chi-Yuan Liao, Der-Shan Sun
Dengue virus (DENV) infection can cause severe, life-threatening events, and no specific treatments for DENV infection are currently approved. Although thrombocytopenia is frequently observed in dengue patients, its pathogenesis is still not fully understood. Previous studies have suggested that DENV-induced thrombocytopenia occurs through viral-replication-mediated megakaryopoiesis inhibition in the bone marrow; however, the exact mechanism for megakaryopoiesis suppression remains elusive. In this study, a reductionist approach was applied, in which C57B/6J mice were inoculated with recombinant DENV-envelope protein domain III (DENV-EIII) instead of the full viral particle...
June 16, 2017: Virulence
https://www.readbyqxmd.com/read/28606810/tailored-design-of-multifunctional-and-programmable-ph-responsive-self-assembling-polypeptides-as-drug-delivery-nanocarrier-for-cancer-therapy
#2
Tzu-Wei Wang, Chia-Wei Yeh, Chen-Hsiang Kuan, Li-Wen Wang, Liang-Hsin Chen, Hsi-Chin Wu, Jui-Shen Sun
Breast cancer has become the second leading cause of cancer-related mortality in female wherein more than 90% of breast cancer-related death results from cancer metastasis to distant organs at advanced stage. The purpose of this study is to develop biodegradable nanoparticles composed of natural polypeptides and calcium phosphate (CaP) with sequential pH-responsivity to tumor microenvironments for active targeted drug delivery. Two different amphiphilic copolymers, poly(ethylene glycol)3400-aconityl linkage-poly(l-glutamic acid)15-poly(l-histidine)10-poly(l-leucine)10 and LyP1-poly(ethylene glycol)1100-poly(l-glutamic acid)15-poly(l-histidine)10-poly(l-leucine)10, were exploited to self-assemble into micelles in aqueous phase...
June 9, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28513731/ag-au-nanoprism-metal-organic-framework-based-paper-for-extending-the-glucose-sensing-range-in-human-serum-and-urine
#3
Pin-Hsuan Huang, Chia Ping Hong, Jian Fan Zhu, Tzu-Ting Chen, Chu-Ting Chan, Yu-Chien Ko, Tien-Li Lin, Zheng-Bang Pan, Ning-Kuei Sun, Ying-Chu Wang, Jong-Jheng Luo, Tzu-Chieh Lin, Chia-Cheng Kang, Jing-Jong Shyue, Mei-Lin Ho
In this work, we present a Ag@Au nanoprism-metal-organic framework-paper based glucose sensor for rapid, sensitive, single-use and quantitative glucose determination in human serum. To achieve painless measurement of glucose with a non-invasive detection methodology, this biosensor was further tested in human urine. In this approach, a new hybrid-Ag@Au nanoprism loaded in close proximity to micrometer sized coordination polymers as phosphorescent luminophores significantly enhanced the emission intensity due to metal-enhanced phosphorescence and worked as reaction sites to support more dissolved oxygen...
May 30, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28501124/effects-of-endotoxin-absorber-hemoperfusion-on-microcirculation-in-septic-pigs
#4
Yu-Chang Yeh, Linda Chia-Hui Yu, Chun-Yu Wu, Ya-Jung Cheng, Chen-Tse Lee, Wei-Zen Sun, Jui-Chang Tsai, Tzu-Yu Lin
BACKGROUND: Endotoxins contribute to systemic inflammatory response and microcirculatory dysfunctions under conditions of sepsis. Polymyxin B hemoperfusion (PMX-HP) is used to remove circulating endotoxins and improve clinical outcomes. This study aims to investigate the effect of PMX-HP on microcirculation in septic pigs. MATERIALS AND METHODS: By using a septic pig model, we tested the hypothesis that PMX-HP can correct intestinal microcirculation, tissue oxygenation saturation, and histopathologic alterations...
May 1, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28410414/phthalate-exposure-and-reproductive-hormones-and-sex-hormone-binding-globulin-before-puberty-phthalate-contaminated-foodstuff-episode-in-taiwan
#5
Hui-Ju Wen, Chu-Chih Chen, Ming-Tsang Wu, Mei-Lien Chen, Chien-Wen Sun, Wen-Chiu Wu, I-Wen Huang, Po-Chin Huang, Tzu-Yun Yu, Chao A Hsiung, Shu-Li Wang
BACKGROUND: In May 2011, a major incident involving phthalates-contaminated foodstuffs occurred in Taiwan. Di-(2-ethylhexyl) phthalate (DEHP) was added to foodstuffs, mainly juice, jelly, tea, sports drink, and dietary supplements. Concerns arose that normal pubertal development, especially reproductive hormone regulation in children, could be disrupted by DEHP exposure. OBJECTIVE: To investigate the association between phthalate exposure and reproductive hormone levels among children following potential exposure to phthalate-tainted foodstuffs...
2017: PloS One
https://www.readbyqxmd.com/read/28212183/cxcl12-cxcr4-signaling-contributes-to-the-pathogenesis-of-opioid-tolerance-a-translational-study
#6
Chih-Peng Lin, Kai-Hsiang Kang, Huang-Ju Tu, Ming-Yueh Wu, Tzu-Hung Lin, Houng-Chi Liou, Wei-Zen Sun, Wen-Mei Fu
BACKGROUND: Long-term opioid therapy for chronic pain may lead to analgesic tolerance, especially when administered intrathecally, thus preventing adequate pain relief. Discovering drug targets to treat opioid tolerance using a mechanism-based approach targeting opioid-induced neuroinflammation provides new therapeutic opportunities. In this study, we provide translational evidence that CXCL12/CXCR4 signaling contributes to the pathogenesis of opioid tolerance. METHODS: The CXCL12 levels in the cerebrospinal fluid of opioid-tolerant patients were compared with those of opioid-naive subjects...
March 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28032914/pleomorphic-mantle-cell-lymphoma-morphologically-mimicking-diffuse-large-b-cell-lymphoma-common-cyclin-d1-negativity-and-a-simple-immunohistochemical-algorithm-to-avoid-the-diagnostic-pitfall
#7
Wen-Yu Chuang, Hung Chang, Gwo-Jyh Chang, Tzu-Hao Wang, Yu-Sun Chang, Tong-Hong Wang, Chi-Ju Yeh, Shir-Hwa Ueng, Hui-Ping Chien, Chiu-Yueh Chang, Yung-Liang Wan, Chuen Hsueh
AIMS: To characterize the clinicopathological and genetic features of pleomorphic mantle cell lymphoma (PMCL), which morphologically mimics diffuse large B cell lymphoma (DLBCL). METHODS AND RESULTS: We screened systematically 500 B cell lymphomas morphologically compatible with DLBCL using an immunohistochemical algorithm of three markers (CD5, cyclin D1 and SOX11). Ten cases of PMCL were identified for further study and, surprisingly, four (40%) of them were cyclin D1-negative...
December 29, 2016: Histopathology
https://www.readbyqxmd.com/read/27872410/risk-of-mortality-of-catheter-related-bloodstream-infections-caused-by-acinetobacter-species
#8
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...
January 1, 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
#9
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
#10
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...
December 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
#11
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
#12
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
#13
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
#14
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
#15
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...
April 2017: 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
#16
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
#17
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
#18
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
#19
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
#20
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
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