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https://www.readbyqxmd.com/read/29346488/a-subretinal-cell-delivery-method-via-suprachoroidal-access-in-minipigs-safety-and-surgical-outcomes
#1
Marc D de Smet, Jessica L Lynch, Nadine S Dejneka, Michael Keane, I John Khan
Purpose: This study evaluated a new subretinal method for delivery of human or pig umbilical tissue-derived cells (hUTC or pUTC, respectively) using a novel subretinal injection cannula and suprachoroidal approach in Göttingen minipig eyes. hUTC (palucorcel) are currently under development for treating geographic atrophy in humans. Methods: Twenty-four Göttingen minipigs (divided into eight groups) were subretinally administered palucorcel, pUTC, or vehicle. In some cases, fluorescently labeled cells and vehicle were administered...
January 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29346102/impedance-measures-during-in-vitro-cochlear-implantation-predict-array-positioning
#2
Christopher Kenneth Giardina, Elliot Samuel Krause, Kanthaiah Koka, Douglas Carl Fitzpatrick
OBJECTIVE: Improper electrode placement during cochlear implant (CI) insertion can adversely affect speech perception outcomes. However, the intraoperative methods to determine positioning are limited. Because measures of electrode impedance can be made quickly, the goal of this study was to assess the relationship between CI impedance and proximity to adjacent structures. METHODS: An Advanced Bionics CI array was inserted into a clear, plastic cochlea one electrode contact at a time in a saline bath (nine trials)...
February 2018: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/29346011/minimally-invasive-management-of-severe-aortoiliac-occlusive-disease
#3
Luigi Pascarella, Maen Aboul Hosn
BACKGROUND: Peripheral arterial disease (PAD) is a complex and highly prevalent pathology. It has been estimated that ∼8.5 million people in the United States are affected by PAD, of which 12%-20% are older than age 60. The TransAtlantic Inter-Society Consensus (TASC) guidelines classified aortoiliac atherosclerotic disease based on morphology and level of lesions. TASC II guidelines recommend bilateral surgical bypass to the femoral arteries for TASC II C and D lesions. The aortobifemoral bypass (ABF) has been considered the gold standard in the treatment of aortoiliac occlusive disease (AIOD)...
January 18, 2018: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/29345600/an-open-source-storage-solution-for-cryo-electron-microscopy-samples
#4
Eveline Ultee, Fred Schenkel, Wen Yang, Susanne Brenzinger, Jamie S Depelteau, Ariane Briegel
Cryo-electron microscopy (cryo-EM) enables the study of biological structures in situ in great detail and to solve protein structures at Ångstrom level resolution. Due to recent advances in instrumentation and data processing, the field of cryo-EM is a rapidly growing. Access to facilities and national centers that house the state-of-the-art microscopes is limited due to the ever-rising demand, resulting in long wait times between sample preparation and data acquisition. To improve sample storage, we have developed a cryo-storage system with an efficient, high storage capacity that enables sample storage in a highly organized manner...
January 18, 2018: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/29344964/recent-advances-and-opportunities-in-proteomic-analyses-of-tumor-heterogeneity
#5
REVIEW
Nicholas W Bateman, Thomas P Conrads
Solid tumor malignancies comprise a highly variable admixture of tumor and non-tumor cellular populations, forming a complex cellular ecosystem and tumor microenvironment. This tumor heterogeneity is not incidental and is known to correlate with poor patient prognosis for many cancer types. Indeed, non-malignant cell populations, such as vascular endothelial and immune cells, are known to play key roles supporting and, in some cases, driving aggressive tumor biology and represent targets of emerging therapeutics, such as anti-angiogenesis and immune checkpoint inhibitors...
January 17, 2018: Journal of Pathology
https://www.readbyqxmd.com/read/29343519/uremic-solute-aryl-hydrocarbon-receptor-tissue-factor-axis-associates-with-thrombosis-after-vascular-injury-in-humans
#6
Vijaya B Kolachalama, Moshe Shashar, Faisal Alousi, Sowmya Shivanna, Keshab Rijal, Mostafa E Belghasem, Joshua Walker, Shinobu Matsuura, Gary H Chang, C Michael Gibson, Laura M Dember, Jean M Francis, Katya Ravid, Vipul C Chitalia
Individuals with CKD are particularly predisposed to thrombosis after vascular injury. Using mouse models, we recently described indoxyl sulfate, a tryptophan metabolite retained in CKD and an activator of tissue factor (TF) through aryl hydrocarbon receptor (AHR) signaling, as an inducer of thrombosis across the CKD spectrum. However, the translation of findings from animal models to humans is often challenging. Here, we investigated the uremic solute-AHR-TF thrombosis axis in two human cohorts, using a targeted metabolomics approach to probe a set of tryptophan products and high-throughput assays to measure AHR and TF activity...
January 17, 2018: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29343144/cell-surface-proteomics-for-the-identification-of-novel-therapeutic-targets-in-cancer
#7
Laura Kuhlmann, Emma Cummins, Ismael Samudio, Thomas Kislinger
Cancer is the second most common cause of death worldwide and its heterogeneity complicates therapy. Standard cytotoxic regiments disrupt rapidly dividing cells, regardless of their neoplastic status. The introduction of less toxic targeted therapies has partially contributed to the observed decrease in cancer-related mortality. Cell-surface proteins represent attractive targets for therapy, due to their easily-accessible localization and their involvement in essential signaling pathways, often dysregulated in cancer...
January 18, 2018: Expert Review of Proteomics
https://www.readbyqxmd.com/read/29341816/red-cell-indexes-made-easy-using-an-interactive-animation-do-students-and-their-scores-concur
#8
Upasana Kachroo, Elizabeth Vinod, Sivakumar Balasubramanian, Jesi W, Neetu Prince
A good understanding of red cell indexes can aid medical students in a considerable manner, serving as a basis to unravel both concepts in red cell physiology and abnormalities associated with the same. In this study, we tried to assess whether an interactive animation was helpful in improving student comprehension and understanding of red cell indexes compared with conventional classroom teaching. Eighty-eight first-year MBBS students participated, of which 44 were assigned to group A and 44 were assigned to group B after randomization...
March 1, 2018: Advances in Physiology Education
https://www.readbyqxmd.com/read/29341191/working-and-caring-for-a-child-with-chronic-illness-a-review-of-current-literature
#9
A M Kish, P A Newcombe, D M Haslam
BACKGROUND: Advances in medical knowledge have contributed to the increase in the number of children living with some form of long-term chronic illness or condition. As a consequence of these advancements, treatments that are more accessible and easier to administer, usually within a child's home, have been developed. However, this may mean that parents take on greater treatment responsibility and require extra time and energy to meet these tasks, additional to other responsibilities...
January 16, 2018: Child: Care, Health and Development
https://www.readbyqxmd.com/read/29340790/an-automated-framework-for-qsar-model-building
#10
Samina Kausar, Andre O Falcao
BACKGROUND: In-silico quantitative structure-activity relationship (QSAR) models based tools are widely used to screen huge databases of compounds in order to determine the biological properties of chemical molecules based on their chemical structure. With the passage of time, the exponentially growing amount of synthesized and known chemicals data demands computationally efficient automated QSAR modeling tools, available to researchers that may lack extensive knowledge of machine learning modeling...
January 16, 2018: Journal of Cheminformatics
https://www.readbyqxmd.com/read/29340710/production-of-plant-derived-polyphenols-in-microorganisms-current-state-and-perspectives
#11
REVIEW
Lars Milke, Jennifer Aschenbrenner, Jan Marienhagen, Nicolai Kallscheuer
Plants synthesize several thousand different polyphenols of which many have the potential to aid in preventing or treating cancer, cardiovascular, and neurodegenerative diseases. However, plants usually contain complex polyphenol mixtures impeding access to individual compounds in larger quantities. In contrast, functional integration of biosynthetic plant polyphenol pathways into microorganisms allows for the production of individual polyphenols as chemically distinct compounds, which can be synthesized in large amounts and can be more easily isolated...
January 16, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29340253/rbiomirgs-an-all-in-one-mirna-gene-set-analysis-solution-featuring-target-mrna-mapping-and-expression-profile-integration
#12
Jing Zhang, Kenneth B Storey
Background: With the continuous discovery of microRNA's (miRNA) association with a wide range of biological and cellular processes, expression profile-based functional characterization of such post-transcriptional regulation is crucial for revealing its significance behind particular phenotypes. Profound advancement in bioinformatics has been made to enable in depth investigation of miRNA's role in regulating cellular and molecular events, resulting in a huge quantity of software packages covering different aspects of miRNA functional analysis...
2018: PeerJ
https://www.readbyqxmd.com/read/29338913/discrepancies-in-staging-treatment-and-delays-to-treatment-may-explain-disparities-in-bladder-cancer-outcomes-an-update-from-the-national-cancer-data-base-2004-2013
#13
Adam B Weiner, Mary-Kate Keeter, Adarsh Manjunath, Joshua J Meeks
INTRODUCTION: We sought to characterize national disparities in the diagnosis of advanced stage bladder cancer. Among patients with advanced disease, we explored disparities in overall survival, treatment, and time to treatment. METHODS AND MATERIALS: We queried the National Cancer Data Base for patients diagnosed with bladder urothelial carcinoma. We used multivariable logistic regression to assess the association between covariates and diagnosis of advanced disease (AJCC stage III-IV)...
January 12, 2018: Urologic Oncology
https://www.readbyqxmd.com/read/29338691/morca-ubiquitous-access-to-life-science-web-services
#14
Sergio Diaz-Del-Pino, Oswaldo Trelles, Juan Falgueras
BACKGROUND: Technical advances in mobile devices such as smartphones and tablets have produced an extraordinary increase in their use around the world and have become part of our daily lives. The possibility of carrying these devices in a pocket, particularly mobile phones, has enabled ubiquitous access to Internet resources. Furthermore, in the life sciences world there has been a vast proliferation of data types and services that finish as Web Services. This suggests the need for research into mobile clients to deal with life sciences applications for effective usage and exploitation...
January 16, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29338165/how-ligands-affect-resistive-switching-in-solution-processed-hfo2-nanoparticle-assemblies
#15
Jiaying Wang, Satyan Choudhary, Jonathan De Roo, Katrien De Keukeleere, Isabel Van Driessche, Alfred J Crosby, Stephen S Nonnenmann
Advancement of resistive random access memory (ReRAM) requires fully understanding the various complex, defect-mediated transport mechanisms to further improve performance. While thin film oxide materials have been extensively studied, the switching properties of nanoparticle assemblies remain underexplored due to difficulties in fabricating ordered structures. Here we employ a simple flow coating method for the facile deposition of highly ordered HfO2 nanoparticle nanoribbon assemblies. The resistive switching character of nanoribbons was determined to correlate directly with the organic capping layer length of their constituting HfO2 nanoparticles, using oleic acid, dodecanoic acid, and undecenoic acid as model nanoparticle ligands...
January 17, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29337142/express-a-database-of-transcriptome-profiles-encompassing-known-and-novel-transcripts-across-multiple-development-stages-in-eye-tissues
#16
Gungor Budak, Soma Dash, Rajneesh Srivastava, Salil A Lachke, Sarath Chandra Janga
Advances in sequencing have facilitated nucleotide-resolution genome-wide transcriptomic profiles across multiple mouse eye tissues. However, these RNA sequencing (RNA-seq) based eye developmental transcriptomes are not organized for easy public access, making any further analysis challenging. Here, we present a new database "Express" (http://www.iupui.edu/∼sysbio/express/) that unifies various mouse lens and retina RNA-seq data and provides user-friendly visualization of the transcriptome to facilitate gene discovery in the eye...
January 11, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29337041/provision-of-abortion-and-other-reproductive-health-services-among-former-midwest-access-project-trainees
#17
Debra B Stulberg, Kristie Monast, Irma H Dahlquist, Kate Palmer
OBJECTIVE: The Midwest Access Project (MAP) offers opt-in training to students, residents, and practicing clinicians in reproductive healthcare including abortion. We surveyed MAP alumni to identify current practice characteristics and assess predictors of reproductive health service provision. STUDY DESIGN: We sent an online survey to alumni of MAP's Individual Clinical Training program, 2007-2015 (n=127). The primary outcome was current provision of any abortion service...
January 11, 2018: Contraception
https://www.readbyqxmd.com/read/29336323/nivolumab-for-recurrent-cutaneous-squamous-cell-carcinoma-three-cases
#18
Veronika Blum, Beat Müller, Silvia Hofer, Esther Pardo, Kristin Zeidler, Joachim Diebold, Klaus Strobel, Christoph Brand, Stefan Aebi, Oliver Gautschi
Programmed cell death ligand 1 (PD-L1) is frequently expressed in cutaneous squamous cell cancer (CSCC) and preliminary data from an ongoing clinical trial suggest that programmed death receptor 1 (PD-1) checkpoint inhibitors may be useful to treat patients with metastatic non-melanoma skin cancer. To report a series of three patients with advanced CSCC treated with nivolumab, showing that commercially available PD-1 checkpoint inhibitors may be useful in non-melanoma skin cancer patients without access to a clinical trial...
January 16, 2018: European Journal of Dermatology: EJD
https://www.readbyqxmd.com/read/29336014/response-to-yazdani-a-surgery-or-in-vitro-fertilisation-the-simplicity-of-this-question-belies-its-complexity-when-all-you-have-is-a-hammer-everything-looks-like-a-nail
#19
Jason Abbott
This is perhaps the most apt mantra of IVF (in vitro fertilisation) as a treatment in Australasia in this day and age. It is also important to note the truth in the identification of IVF being low skill-based, largely independent of the practitioner, but more importantly costly, and with few exceptions, only available in the private sector. Such revelations really require a rethink of the entire reproductive endocrinology and infertility (CREI) subspecialty. In fact, if there is only one solution to all fertility problems - that of the 'effective IVF procedure' - why not do away completely with the clinician and simply have nurse practitioners who oversee the identified issue of an individual or couple wanting a pregnancy? This in conjunction with the outstanding scientific advances that led to the initiation and promulgation of IVF really would reduce costs by cutting out the unnecessary clinician middle-person who is unimportant in the equation...
January 16, 2018: Australian & New Zealand Journal of Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/29334362/investigation-of-resistance-switching-in-siox-rram-cells-using-a-3d-multi-scale-kinetic-monte-carlo-simulator
#20
Toufik Sadi, Adnan Mehonic, Luca Montesi, Mark Buckwell, Anthony Kenyon, Asen Asenov
We employ an advanced three-dimensional (3D) electro-thermal simulator to explore the physics and potential of oxide-based resistive random-access memory (RRAM) cells. The physical simulation model has been developed recently, and couples a kinetic Monte Carlo study of electron and ionic transport to the self-heating phenomenon while accounting carefully for the physics of vacancy generation and recombination, and trapping mechanisms. The simulation framework successfully captures resistance switching, including the electroforming, set and reset processes, by modeling the dynamics of conductive filaments in the 3D space...
January 15, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
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