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https://www.readbyqxmd.com/read/28926978/fabrication-of-magnetic-nanofibers-by-needleless-electrospinning-from-a-self-assembling-polymer-ferrofluid-cone-array
#1
Weilong Huang, Bin Liu, Zhipeng Chen, Hongjian Wang, Lei Ren, Jiaming Jiao, Lin Zhuang, Jie Luo, Lelun Jiang
Magnetic nanofiber has been widely applied in biomedical fields due to its distinctive size, morphology, and properties. We proposed a novel needleless electrospinning method to prepare magnetic nanofibers from the self-assembling "Taylor cones" of poly(vinyl pyrrolidone) (PVP)/Fe₃O₄ ferrofluid (PFF) under the coincident magnetic and electric fields. The results demonstrated that a static PFF Rosensweig instability with a conical protrusion could be obtained under the magnetic field. The tip of the protrusion emitted an electrospinning jet under the coincident magnetic and electric fields...
September 17, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28926867/diabetes-associated-biobanking-more-topical-than-ever
#2
Katharina Lydia Kynast, Nadine Volk, Thomas Fleming, Esther Herpel
The increasing prevalence of diabetes and its accompanying long-term complications, as well as the associated economic burden, calls for a rapid clinical translation of biomedical research to better valid the physiological relevance of the findings from basic research. To meet this condition, the Collaborative Research Center (CRC) 1118 has established the first nationwide diabetes-specific Biomaterialbank (BMB) that permanently preserves solid and liquid specimen retro- and prospectively at the Institute of Pathology and Department of Endocrinology of the University Hospital Heidelberg...
September 19, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28926673/combinatorial-genome-and-protein-engineering-yields-monoclonal-antibodies-with-hypergalactosylation-from-cho-cells
#3
Cheng-Yu Chung, Qiong Wang, Shuang Yang, Sean A Ponce, Brian J Kirsch, Hui Zhang, Michael J Betenbaugh
One of the key quality attributes of monoclonal antibodies is the glycan pattern and distribution. Two terminal galactose residues typically represent a small fraction of the total glycans from antibodies. However, antibodies with defined glycosylation properties including enhanced galactosylation have been shown to exhibit altered properties for these important biomedical modalities. In this study, the disruption of two α-2,3 sialyltransferases (ST3GAL4 and ST3GAL6) from Chinese Hamster Ovary (CHO) cells was combined with protein engineering of the Fc region to generate an IgG containing 80% bigalactosylated and fucosylated (G2F) glycoforms...
July 7, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28926588/the-effects-of-storage-temperature-and-duration-of-blood-samples-on-dna-and-rna-qualities
#4
Lien-Hung Huang, Pei-Hsien Lin, Kuo-Wang Tsai, Liang-Jen Wang, Ying-Hsien Huang, Ho-Chang Kuo, Sung-Chou Li
DNA and RNA samples from blood are the common examination target for non-invasive physical tests and/or biomedical studies. Since high-quality DNA and RNA samples guarantee the correctness of these tests and/or studies, we investigated the effects of storage temperature and storage duration of whole blood on DNA and RNA qualities. Subjects were enrolled to donate blood samples which were stored for different durations and at different temperatures, followed by the examinations on RNA quality, qPCR, DNA quality and DNA methylation...
2017: PloS One
https://www.readbyqxmd.com/read/28926390/misconceptions-misuses-and-misinterpretations-of-p-values-and-significance-testing
#5
Joel J Gagnier, Hal Morgenstern
The interpretation and reporting of p values and significance testing in biomedical research are fraught with misconceptions and inaccuracies. Publications of peer-reviewed research in orthopaedics are not immune to such problems. The American Statistical Association (ASA) recently published an official statement on the use, misuse, and misinterpretation of statistical testing and p values in applied research. The ASA statement discussed 6 principles: (1) "P-values can indicate how incompatible the data are with a specified statistical model...
September 20, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28926224/silver-nanocluster-embedded-zein-films-as-antimicrobial-coating-materials-for-food-packaging
#6
Lei Mei, Zi Teng, Guizhi Zhu, Yijing Liu, Fuwu Zhang, Jinglin Zhang, Ying Li, Yongguang Guan, Yaguang Luo, Xianggui Chen, Qin Wang
Highly efficient antimicrobial agents with low toxicity and resistance have been enthusiastically pursued to address public concerns on microbial contamination in food. Silver nanoclusters (AgNCs) are known for their ultra-small sizes and unique optical and chemical properties. Despite extensive studies of AgNCs for biomedical applications, previous research on their application as antimicrobials for food applications is very limited. Here, for the first time, by incorporating AgNCs (~ 2 nm in diameter) into zein films that are widely used as food packaging materials, we developed a novel coating material with potent antimicrobial activity, low toxicity to human cells, and low potential to harm the environment...
September 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28925997/precision-annotation-of-digital-samples-in-ncbi-s-gene-expression-omnibus
#7
Dexter Hadley, James Pan, Osama El-Sayed, Jihad Aljabban, Imad Aljabban, Tej D Azad, Mohamad O Hadied, Shuaib Raza, Benjamin Abhishek Rayikanti, Bin Chen, Hyojung Paik, Dvir Aran, Jordan Spatz, Daniel Himmelstein, Maryam Panahiazar, Sanchita Bhattacharya, Marina Sirota, Mark A Musen, Atul J Butte
The Gene Expression Omnibus (GEO) contains more than two million digital samples from functional genomics experiments amassed over almost two decades. However, individual sample meta-data remains poorly described by unstructured free text attributes preventing its largescale reanalysis. We introduce the Search Tag Analyze Resource for GEO as a web application (http://STARGEO.org) to curate better annotations of sample phenotypes uniformly across different studies, and to use these sample annotations to define robust genomic signatures of disease pathology by meta-analysis...
September 19, 2017: Scientific Data
https://www.readbyqxmd.com/read/28925991/a-multiscale-imaging-and-modelling-dataset-of-the-human-inner-ear
#8
Nicolas Gerber, Mauricio Reyes, Livia Barazzetti, Hans Martin Kjer, Sergio Vera, Martin Stauber, Pavel Mistrik, Mario Ceresa, Nerea Mangado, Wilhelm Wimmer, Thomas Stark, Rasmus R Paulsen, Stefan Weber, Marco Caversaccio, Miguel A González Ballester
Understanding the human inner ear anatomy and its internal structures is paramount to advance hearing implant technology. While the emergence of imaging devices allowed researchers to improve understanding of intracochlear structures, the difficulties to collect appropriate data has resulted in studies conducted with few samples. To assist the cochlear research community, a large collection of human temporal bone images is being made available. This data descriptor, therefore, describes a rich set of image volumes acquired using cone beam computed tomography and micro-CT modalities, accompanied by manual delineations of the cochlea and sub-compartments, a statistical shape model encoding its anatomical variability, and data for electrode insertion and electrical simulations...
September 19, 2017: Scientific Data
https://www.readbyqxmd.com/read/28925946/development-and-biocompatibility-evaluation-of-photocatalytic-tio%C3%A2-reduced-graphene-oxide-based-nanoparticles-designed-for-self-cleaning-purposes
#9
Ionela Cristina Nica, Miruna S Stan, Marcela Popa, Mariana Carmen Chifiriuc, Gratiela G Pircalabioru, Veronica Lazar, Iuliana Dumitrescu, Lucian Diamandescu, Marcel Feder, Mihaela Baibarac, Marin Cernea, Valentin Adrian Maraloiu, Traian Popescu, Anca Dinischiotu
Graphene is widely used in nanotechnologies to amplify the photocatalytic activity of TiO₂, but the development of TiO₂/graphene composites imposes the assessment of their risk to human and environmental health. Therefore, reduced graphene oxide was decorated with two types of TiO₂ particles co-doped with 1% iron and nitrogen, one of them being obtained by a simultaneous precipitation of Ti(3+) and Fe(3+) ions to achieve their uniform distribution, and the other one after a sequential precipitation of these two cations for a higher concentration of iron on the surface...
September 19, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28925867/lignocellulosic-biomass-derived-functional-materials-synthesis-and-applications-in-biomedical-engineering
#10
Lei Zhang, Xinwen Peng, Linxin Zhong, Weitian Chua, Zhihua Xiang, Runcang Sun
The pertinent issue of resources shortage arising from global climate change in the recent years has accentuated the importance of materials that are environmental friendly. Despite the merits of current material like cellulose as the most abundant natural polysaccharide on earth, the incorporation of lignocellulosic biomass has the potential to value-add the recent development of cellulose-derivatives in drug delivery systems. Lignocellulosic biomass, with a hierarchical structure, comprised of cellulose, hemicellulose and lignin...
September 18, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28924872/-alzheimer-s-disease-from-auguste-deter-to-the-present-progress-disappointments-and-open-questions
#11
REVIEW
Johannes Pantel
AIM: The present article aims to provide a short overview of the discovery history, conceptual development, as well as on current neurobiological and pharmacological research questions in the field of Alzheimer's disease (AD). In view of the long hoped for but so far unachieved therapeutic breakthrough, this also includes a critical reflection of current research paradigms. MATERIAL AND METHODS: Starting from the first case report described by Alois Alzheimer in 1906, the historical impact of his seminal discovery is reconstructed...
September 18, 2017: Zeitschrift Für Gerontologie und Geriatrie
https://www.readbyqxmd.com/read/28924503/biochemical-and-structural-characterization-of-a-novel-arginine-kinase-from-the-spider-polybetes-pythagoricus
#12
Aldana Laino, Alonso A Lopez-Zavala, Karina D Garcia-Orozco, Jesus S Carrasco-Miranda, Marianela Santana, Vivian Stojanoff, Rogerio R Sotelo-Mundo, Carlos Fernando Garcia
Energy buffering systems are key for homeostasis during variations in energy supply. Spiders are the most important predators for insects and therefore key in terrestrial ecosystems. From biomedical interest, spiders are important for their venoms and as a source of potent allergens, such as arginine kinase (AK, EC 2.7.3.3). AK is an enzyme crucial for energy metabolism, keeping the pool of phosphagens in invertebrates, and also an allergen for humans. In this work, we studied AK from the Argentininan spider Polybetes pythagoricus (PpAK), from its complementary DNA to the crystal structure...
2017: PeerJ
https://www.readbyqxmd.com/read/28924347/the-mechanisms-of-graphene-based-materials-induced-programmed-cell-death-a-review-of-apoptosis-autophagy-and-programmed-necrosis
#13
REVIEW
Lingling Ou, Shaoqiang Lin, Bin Song, Jia Liu, Renfa Lai, Longquan Shao
Graphene-based materials (GBMs) are widely used in many fields, including biomedicine. To date, much attention had been paid to the potential unexpected toxic effects of GBMs. Here, we review the recent literature regarding the impact of GBMs on programmed cell death (PCD). Apoptosis, autophagy, and programmed necrosis are three major PCDs. Mechanistic studies demonstrated that the mitochondrial pathways and MAPKs (JNK, ERK, and p38)- and TGF-β-related signaling pathways are implicated in GBMs-induced apoptosis...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28923968/soft-tubular-microfluidics-for-2d-and-3d-applications
#14
Wang Xi, Fang Kong, Joo Chuan Yeo, Longteng Yu, Surabhi Sonam, Ming Dao, Xiaobo Gong, Chwee Teck Lim
Microfluidics has been the key component for many applications, including biomedical devices, chemical processors, microactuators, and even wearable devices. This technology relies on soft lithography fabrication which requires cleanroom facilities. Although popular, this method is expensive and labor-intensive. Furthermore, current conventional microfluidic chips precludes reconfiguration, making reiterations in design very time-consuming and costly. To address these intrinsic drawbacks of microfabrication, we present an alternative solution for the rapid prototyping of microfluidic elements such as microtubes, valves, and pumps...
September 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28923738/single-step-synthesis-of-carbon-encapsulated-magnetic-nanoparticles-in-arc-plasma-and-potential-biomedical-applications
#15
Xiuqi Fang, Xiaoqian Cheng, Yuerou Zhang, Lijie Grace Zhang, Michael Keidar
A novel highly controllable process of Carbon Encapsulated Magnetic Nanoparticles (CEMNs) synthesis in arc discharge plasma has been developed. In this work, both the size distribution and the purity of the CEMNs have been made more controllable by adding an external magnetic field. It is shown that with the increase of the external magnetic field, the CEMNs get a better separation from the carbon impurities and the size distribution become narrower. This conclusion is valid for Fe, Ni and Fe+Ni CEMNs synthesis...
September 7, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28923420/high-doses-of-lipid-core-nanocapsules-do-not-affect-bovine-embryonic-development-in-vitro
#16
Caroline Lucas, Mariana Remião, Franciele Bruinsmann, Isadora Lopes, Morgana Borges, Ana Laura Feijó, Andrea Cristina Basso, Adriana Pohlmann, Silvia Guterres, Vinicius Campos, Fabiana Seixas, Tiago Collares
The improvement of in vitro embryo production by culture media supplementation has been a potential tool to increase blastocyst quality and development. Recently, lipid-core nanocapsules (LNC), which were developed for biomedical applications as a drug-delivery system, have demonstrated beneficial effects on in vitro embryo production studies. LNCs have a core composed of sorbitan monostearate dispersed in capric/caprylic triglyceride. Based on that, we firstly investigated if LNCs supplemented during in vitro oocyte maturation had affinity to the mineral oil placed over the top of the IVM media...
September 15, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28923291/use-of-prohibited-medication-a-potentially-overlooked-confounder-in-clinical-trials-omarigliptin-once-weekly-dpp-4-inhibitor-monotherapy-trial-in-18-to-45-year-olds
#17
Ira Gantz, Liubov Sokolova, Lokesh Jain, Carol Iredale, Edward A O'Neill, Ziwen Wei, Raymond Lam, Shailaja Suryawanshi, Keith D Kaufman, Samuel S Engel, Eseng Lai
PURPOSE: The objective of this clinical trial was to assess the efficacy and safety of omarigliptin monotherapy in young adult patients with type 2 diabetes mellitus (T2DM). Unexpected efficacy results in this trial led to a series of investigations that identified the use of prohibited medication by a substantial number of trial patients. METHODS: Patients with T2DM who were ≥18 to <45 years of age and either drug-naive or not on an antihyperglycemic agent for ≥12 weeks with inadequate glycemic control were randomized in a double-blind manner to receive omarigliptin 25 mg once weekly (n = 102) or placebo once weekly (n = 101) for 24 weeks...
September 15, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28923158/isotopic-self-organization-as-an-informational-factor-in-biological-systems
#18
Alexander A Berezin, Vladimir V Gridin
We outline possible effects of isotopic randomness and isotopic self-organization (isotopicity) for biology, genetics, neurodynamics and conscious-ness. Prime ideas are (a) isotopic genetic code based on isotopic permutations in genomes, and (b) catalytic effects of decays of radioactive isotopes in physiology and psychology. We discuss the reasons why these ideas are presently severely under-appreciated by the biomedical research community. We propose some steps to foster interest in isotopic effects in biology...
October 2017: Nonlinear Dynamics, Psychology, and Life Sciences
https://www.readbyqxmd.com/read/28923006/repeat-a-framework-to-assess-empirical-reproducibility-in-biomedical-research
#19
Leslie D McIntosh, Anthony Juehne, Cynthia R H Vitale, Xiaoyan Liu, Rosalia Alcoser, J Christian Lukas, Bradley Evanoff
BACKGROUND: The reproducibility of research is essential to rigorous science, yet significant concerns of the reliability and verifiability of biomedical research have been recently highlighted. Ongoing efforts across several domains of science and policy are working to clarify the fundamental characteristics of reproducibility and to enhance the transparency and accessibility of research. METHODS: The aim of the proceeding work is to develop an assessment tool operationalizing key concepts of research transparency in the biomedical domain, specifically for secondary biomedical data research using electronic health record data...
September 18, 2017: BMC Medical Research Methodology
https://www.readbyqxmd.com/read/28923003/cleaning-by-clustering-methodology-for-addressing-data-quality-issues-in-biomedical-metadata
#20
Wei Hu, Amrapali Zaveri, Honglei Qiu, Michel Dumontier
BACKGROUND: The ability to efficiently search and filter datasets depends on access to high quality metadata. While most biomedical repositories require data submitters to provide a minimal set of metadata, some such as the Gene Expression Omnibus (GEO) allows users to specify additional metadata in the form of textual key-value pairs (e.g. sex: female). However, since there is no structured vocabulary to guide the submitter regarding the metadata terms to use, consequently, the 44,000,000+ key-value pairs in GEO suffer from numerous quality issues including redundancy, heterogeneity, inconsistency, and incompleteness...
September 18, 2017: BMC Bioinformatics
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