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https://www.readbyqxmd.com/read/28428043/effects-of-bone-marrow-on-the-microenvironment-of-the-human-pancreatic-islet-a-protein-profile-approach
#1
Joseph William Kim, Souriya Vang, John Luo, William Newton, Luguang Luo
Stem cells are a new therapeutic modality that may support the viability and function of human organs and tissue. Our previous studies have revealed that human allogeneic bone marrow (BM) sustains pancreatic β cell function and survival. This paper examines whether BM creates a microenvironment that supports human pancreatic islets in vitro by evaluating 107 proteins in culture media from BM, islet, and islet/bone marrow (IB) with mass spectrometry. Proteins were considered up- or down-regulated if p-values < 0...
April 17, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28388364/piezo2-expression-in-mechanosensitive-dental-primary-afferent-neurons
#2
J Won, H Vang, P R Lee, Y H Kim, H W Kim, Y Kang, S B Oh
Mechanosensitive ion channels have been suggested to be expressed in dental primary afferent (DPA) neurons to transduce the movement of dentinal fluid since the proposal of hydrodynamic theory. Piezo2, a mechanosensitive, rapidly inactivating (RI) ion channel, has been recently identified in dorsal root ganglion (DRG) neurons to mediate tactile transduction. Here, we examined the expression of Piezo2 in DPA neurons by in situ hybridization, single-cell reverse transcriptase polymerase chain reaction, and whole-cell patch-clamp recordings...
April 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28384160/a-wnt-planar-polarity-pathway-instructs-neurite-branching-by-restricting-f-actin-assembly-through-endosomal-signaling
#3
Chun-Hao Chen, Chun-Wei He, Chien-Po Liao, Chun-Liang Pan
Spatial arrangement of neurite branching is instructed by both attractive and repulsive cues. Here we show that in C. elegans, the Wnt family of secreted glycoproteins specify neurite branching sites in the PLM mechanosensory neurons. Wnts function through MIG-1/Frizzled and the planar cell polarity protein (PCP) VANG-1/Strabismus/Vangl2 to restrict the formation of F-actin patches, which mark branching sites in nascent neurites. We find that VANG-1 promotes Wnt signaling by facilitating Frizzled endocytosis and genetically acts in a common pathway with arr-1/β-arrestin, whose mutation results in defective PLM branching and F-actin patterns similar to those in the Wnt, mig-1 or vang-1 mutants...
April 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28374975/enrichment-of-genetic-variants-in-the-glucocorticoid-receptor-signalling-pathway-in-autoimmune-hepatitis-with-failure-of-standard-treatment
#4
Peter Lykke Eriksen, Martin Kreutzfeldt, Henning Grønbaek, Kasper Thorsen, Søren Vang, Niels Jessen, Hendrik Vilstrup
The standard treatment for autoimmune hepatitis (AIH) is predniso(lo)ne for remission induction, tapered and followed by azathioprine, which effectively controls the disease in the majority of patients. However, some patients prove to be unresponsive or non-tolerant and require alternative immunosuppressive regimens for disease control. We aimed to investigate whether these AIH patients who experience failure of standard treatment have a genomic basis for their problem in the form of pharmacogenetic variants...
April 4, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28374898/disease-spectrum-and-management-of-children-admitted-with-acute-respiratory-infection-in-viet-nam
#5
T K P Nguyen, D V Nguyen, T N H Truong, A Tran, S M Graham, B J Marais
OBJECTIVE: To assess the acute respiratory infection (ARI) disease spectrum, duration of hospitalisation and outcome in children hospitalised with an ARI in Viet Nam. METHODS: We conducted a retrospective descriptive study of ARI admissions to primary (Hoa Vang District Hospital), secondary (Da Nang Hospital for Women and Children) and tertiary (National Hospital of Paediatrics in Ha Noi) level hospitals in Viet Nam over 12 months (01/09/2015 to 31/08/2016). RESULTS: ARIs accounted for 27...
April 4, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28374512/pharmacokinetic-analysis-of-inhaled-salmeterol-in-asthma-patients-evidence-from-two-dry-powder-inhalers
#6
Konstantina Soulele, Panos Macheras, Vangelis Karalis
Salmeterol (SAL) is a long-acting β2-adrenergic agonist, which is widely used in the asthma therapy. The aim of this study was to investigate the pharmacokinetics (PK) of inhaled SAL in asthma patients using two different dry powder inhalers. This analysis was based on data from 45 subjects who participated in a two-sequence, four period crossover bioequivalence (BE) study after single administration of the test (T) and reference (R) products. In order to mimic more closely the real treatment conditions, activated charcoal was not co-administered...
April 3, 2017: Biopharmaceutics & Drug Disposition
https://www.readbyqxmd.com/read/28334810/bimodal-regulation-of-dishevelled-function-by-vangl2-during-morphogenesis
#7
Hwa-Seon Seo, Raymond Habas, Chenbei Chang, Jianbo Wang
Convergent extension (CE) is a fundamental morphogenetic mechanism that underlies numerous processes in vertebrate development, and its disruption can lead to human congenital disorders such as neural tube closure defects. The dynamic, oriented cell intercalation during CE is regulated by a group of core proteins identified originally in flies to coordinate epithelial planar cell polarity (PCP). The existing model explains how core PCP proteins, including Van Gogh (Vang) and Dishevelled (Dvl), segregate into distinct complexes on opposing cell cortex to coordinate polarity among static epithelial cells...
March 13, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28334169/characterization-of-saccharomyces-uvarum-beijerinck-1898-and-related-hybrids-assessment-of-molecular-markers-that-predict-the-parent-and-hybrid-genomes-and-a-proposal-to-name-yeast-hybrids
#8
Huu-Vang Nguyen, Teun Boekhout
The use of the nuclear-DNA re-association technique has led taxonomists to consider Saccharomyces uvarum a synonym of S. bayanus. The latter, however, is not a species but a hybrid harbouring S. eubayanus (Seu) and S. uvarum (Su) sub-genomes with a minor DNA contribution from S. cerevisiae (Sc). To recognize genetically pure lines of S. uvarum and putative interspecies hybrids among so-called S. bayanus strains present in public culture collections, we propose the use of four markers that were defined from the S...
March 3, 2017: FEMS Yeast Research
https://www.readbyqxmd.com/read/28304219/surgical-or-transcatheter-aortic-valve-replacement-in-intermediate-risk-patients
#9
Michael J Reardon, Nicolas M Van Mieghem, Jeffrey J Popma, Neal S Kleiman, Lars Søndergaard, Mubashir Mumtaz, David H Adams, G Michael Deeb, Brijeshwar Maini, Hemal Gada, Stanley Chetcuti, Thomas Gleason, John Heiser, Rüdiger Lange, William Merhi, Jae K Oh, Peter S Olsen, Nicolo Piazza, Mathew Williams, Stephan Windecker, Steven J Yakubov, Eberhard Grube, Raj Makkar, Joon S Lee, John Conte, Eric Vang, Hang Nguyen, Yanping Chang, Andrew S Mugglin, Patrick W J C Serruys, Arie P Kappetein
Background Although transcatheter aortic-valve replacement (TAVR) is an accepted alternative to surgery in patients with severe aortic stenosis who are at high surgical risk, less is known about comparative outcomes among patients with aortic stenosis who are at intermediate surgical risk. Methods We evaluated the clinical outcomes in intermediate-risk patients with severe, symptomatic aortic stenosis in a randomized trial comparing TAVR (performed with the use of a self-expanding prosthesis) with surgical aortic-valve replacement...
April 6, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28298144/enhanced-raman-spectroscopy-via-plasmonic-and-carbonaceous-nanostructures-for-the-detection-diagnosis-and-treatment-of-cancer-part-2-treatment
#10
Emilie Darrigues, Vijayalakshmi Dantuluri, Zeid A Nima, Kieng B Vang, Robert J Griffin, Alexandru R Biris, Anindya Ghosh, Alexandru S Biris
Raman spectroscopy and surface-enhanced Raman scattering (SERS) have the potential to improve the accurate treatment, detection, and monitoring of various diseases, particularly cancer. Over the last decade, technological developments have enhanced Raman spectroscopy's ability to detect, discriminate, and diagnose cancers, both with and without complex nanosystems. This review discusses the recent advances that have made Raman a major tool for tumor resection guidance, for drug delivery targeting and monitoring, and enhancing photodynamic and photothermal therapy with the support of carbon-based and/or noble metal plasmonic nanoparticles...
March 15, 2017: Drug Metabolism Reviews
https://www.readbyqxmd.com/read/28288640/overexpression-of-a-c4-dicarboxylate-transporter-is-the-key-for-rerouting-citric-acid-to-c4-dicarboxylic-acid-production-in-aspergillus-carbonarius
#11
Lei Yang, Eleni Christakou, Jesper Vang, Mette Lübeck, Peter Stephensen Lübeck
BACKGROUND: C4-dicarboxylic acids, including malic acid, fumaric acid and succinic acid, are valuable organic acids that can be produced and secreted by a number of microorganisms. Previous studies on organic acid production by Aspergillus carbonarius, which is capable of producing high amounts of citric acid from varieties carbon sources, have revealed its potential as a fungal cell factory. Earlier attempts to reroute citric acid production into C4-dicarboxylic acids have been with limited success...
March 14, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28274633/discovery-of-a-2-fluoro-2-c-methyl-c-nucleotide-hcv-polymerase-inhibitor-and-a-phosphoramidate-prodrug-with-favorable-properties
#12
Thorsten A Kirschberg, Sammy Metobo, Michael O Clarke, Vangelis Aktoudianakis, Darius Babusis, Ona Barauskas, Gabriel Birkus, Thomas Butler, Daniel Byun, Gregory Chin, Edward Doerffler, Thomas E Edwards, Martijn Fenaux, Rick Lee, Willard Lew, Michael R Mish, Eisuke Murakami, Yeojin Park, Neil H Squires, Neeraj Tirunagari, Ting Wang, Mark Whitcomb, Jie Xu, Huiling Yang, Hong Ye, Lijun Zhang, Todd C Appleby, Joy Y Feng, Adrian S Ray, Aesop Cho, Choung U Kim
A series of 2'-fluorinated C-nucleosides were prepared and tested for anti-HCV activity. Among them, the triphosphate of 2'-fluoro-2'-C-methyl adenosine C-nucleoside (15) was a potent and selective inhibitor of the NS5B polymerase and maintained activity against the S282T resistance mutant. A number of phosphoramidate prodrugs were then prepared and evaluated leading to the identification of the 1-aminocyclobutane-1-carboxylic acid isopropyl ester variant (53) with favorable pharmacokinetic properties including efficient liver delivery in animals...
February 20, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28269654/a-hybrid-discrete-continuous-model-of-in-vitro-spheroid-tumor-growth-and-drug-response
#13
Giorgos Tzedakis, Evangelos Liapis, Eleftheria Tzamali, Giannis Zacharakis, Vangelis Sakkalis
Anti-cancer therapy efficacy in solid tumors mainly depends on drug transportation through the vasculature system and the extracellular matrix, on diffusion gradients and clonal heterogeneity within the tumor mass, as well as on the responses of the individual tumor cells to drugs and their interactions with each other and their local microenvironment. In this work, we develop a mathematical predictive model for tumor growth and drug response based on 3D spheroids experiments that possess several in vivo features of tumors and are considered better for drug screening...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269534/addressing-drug-drug-and-drug-food-interactions-through-personalized-empowerment-services-for-healthcare
#14
Marios Spanakis, Emmanouil G Spanakis, Haridimos Kondylakis, Stelios Sfakianakis, Irini Genitsaridi, Vangelis Sakkalis, Manolis Tsiknakis, Kostas Marias
Personalized healthcare systems support the provision of timely and appropriate information regarding healthcare options and treatment alternatives. Especially for patients that receive multi-drug treatments a key issue is the minimization of the risk of adverse effects due to drug-drug interactions (DDIs). DDIs may be the result of doctor prescribed drugs but also due to self-medication of conventional drugs, alternative medicines, food habits, alcohol or smoking. It is therefore crucial for personalized health systems, apart from assisting physicians for optimal prescription practices, to also provide appropriate information for individual users for drug-drug interactions or similar information regarding risks for modulation of the ensuing treatment...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268893/applicability-of-ssvep-based-brain-computer-interfaces-for-robot-navigation-in-real-environments
#15
Christina Farmaki, Georgios Christodoulakis, Vangelis Sakkalis
Brain-computer interfaces have been extensively studied and used in order to aid patients suffering from neuromuscular diseases to communicate and control the surrounding environment. Steady-state visual evoked potentials (SSVEP) constitute a very popular BCI stimulation protocol, due to their efficiency and quick response time. In this study, we developed a SSVEP-based BCI along with a low-cost custom radio-controlled robot-car providing live video feedback from a wireless camera mounted on the robot, serving as our testbed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28264609/enhanced-raman-spectroscopy-via-plasmonic-and-carbonaceous-nanostructures-for-the-detection-diagnosis-and-treatment-of-cancer-part-1-diagnosis
#16
Emilie Darrigues, Zeid A Nima, Waquar Majeed, Kieng Bao Vang, Vijayalakshmi Dantuluri, Alexandru R Biris, Vladimir Zharov, Robert J Griffin, Alexandru S Biris
Spectroscopic techniques including Raman, photothermal, photoacoustic, have been intensively studied for the accurate and fast detection of diseases, such as cancer. Additionally, due to the drastic, rapid advances in computer science and the intense use of various multifunctional nanosystems in the medical field, surface-enhanced Raman scattering (SERS) and Raman spectroscopy have developed quickly as new tools for fundamental analysis in biochemical science and as a new imaging method to aid in early, efficient cancer diagnosis...
March 7, 2017: Drug Metabolism Reviews
https://www.readbyqxmd.com/read/28259120/study-of-age-dependent-structural-and-functional-changes-of-mitochondria-in-skeletal-muscles-and-heart-of-naked-mole-rats-heterocephalus-glaber
#17
S Holtze, C M Eldarov, V B Vays, I M Vangeli, M Yu Vysokikh, L E Bakeeva, V P Skulachev, T B Hildebrandt
Morphometric analysis of mitochondria in skeletal muscles and heart of 6- and 60-month-old naked mole rats (Heterocephalus glaber) revealed a significant age-dependent increase in the total area of mitochondrial cross-sections in studied muscle fibers. For 6- and 60-month-old animals, these values were 4.8 ± 0.4 and 12.7 ± 1.8%, respectively. This effect is mainly based on an increase in the number of mitochondria. In 6-month-old naked mole rats, there were 0.23 ± 0.02 mitochondrial cross-sections per µm(2) of muscle fiber, while in 60-month-old animals this value was 0...
December 2016: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/28258105/effect-of-%C3%AE-7-nicotinic-acetylcholine-receptor-activation-on-cardiac-fibroblasts-a-mechanism-underlying-rv-fibrosis-associated-with-cigarette-smoke-exposure
#18
Alexander Vang, Richard T Clements, Havovi Chichger, Nouaying Kue, Ayed Allawzi, Kelly A O'Connell, Euy-Myoung Jeong, Samuel Dudley, Pavlo Sakhatskyy, Qing Lu, Peng Zhang, Sharon Rounds, Gaurav Choudhary
INTRODUCTION: Right ventricular dysfunction is associated with numerous smoking-related illnesses including chronic obstructive pulmonary disease (COPD) where it is present even in absence of pulmonary hypertension. It is unknown if exposure to cigarette smoke has direct effects on RV function and cardiac fibroblast proliferation or collagen synthesis. In this study, we evaluated cardiac function and fibrosis in mice exposed to cigarette smoke (CS) and determined mechanisms of smoke-induced changes in cardiac fibroblast signaling and fibrosis...
March 3, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28248817/long-term-behavior-of-serous-borderline-tumors-subdivided-into-atypical-proliferative-tumors-and-noninvasive-low-grade-carcinomas-a-population-based-clinicopathologic-study-of-942-cases
#19
Russell Vang, Charlotte G Hannibal, Jette Junge, Kirsten Frederiksen, Susanne K Kjaer, Robert J Kurman
Ovarian serous borderline tumors (SBTs) have been the subject of considerable controversy, particularly with regard to terminology and behavior. It has been proposed that they constitute a heterogenous group of tumors composed, for the most part, of typical SBTs that are benign and designated "atypical proliferative serous tumor (APST)" and a small subset of SBTs with micropapillary architecture that have a poor outcome and are designated "noninvasive low-grade serous carcinoma (niLGSC)". It also has been argued that the difference in behavior between the 2 groups is not due to the subtype of the primary tumor but rather the presence of extraovarian disease, specifically invasive implants...
February 28, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28240173/personalized-medicine-of-alcohol-addiction-pharmacogenomics-and-beyond
#20
Vangelis George Manolopoulos, Georgia Ragia
Alcohol addiction or alcoholism is the most severe form of problem drinking. A variety of treatment methods for alcoholism are currently available that combine medications, behavioral treatment and peer support. The drugs that are currently approved by the U.S. Food and Drug Administration (FDA) for treatment of alcohol dependence are disulfiram, naltrexone and acamprosate. For many patients, however, these treatments are not effective. Evidence from a number of different studies suggests that different factors, both psychosocial and economic, as well as genetic variation, are significant contributors to interindividual variation both of clinical presentation of alcohol problems and response to a given treatment...
February 23, 2017: Current Pharmaceutical Biotechnology
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