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https://www.readbyqxmd.com/read/28535451/a-novel-carbohydrate-labeling-method-utilizing-transfer-hydrogenation-mediated-reductive-amination
#1
Zsuzsanna Kovács, Gábor Papp, Henrietta Horváth, Ferenc Joó, András Guttman
One of the most frequently used high-resolution glycan analysis methods in the biopharmaceutical and biomedical fields is capillary electrophoresis with laser-induced fluorescence (CE-LIF) detection. Glycans are usually labeled by reductive amination with a charged fluorophore containing a primary amine, which reacts with the aldehyde group at the reducing end of the glycan structures. In this reaction, first a Schiff base is formed that is reduced to form a stable conjugate by a hydrogenation reagent, such as sodium cyanoborohydride...
May 13, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28535012/neokestose-suppresses-the-growth-of-human-melanoma-a2058-cells-via-inhibition-of-the-nuclear-factor%C3%A2-%C3%AE%C2%BAb-signaling-pathway
#2
Jiann-Shing Wu, Jan-Yi Chang, C Will Chen, Ming-Tse Lin, Dey-Chyi Sheu, Shun-Mei Lee
Neokestose has superior prebiotic effects compared with the commercial fructooligosaccharides (FOS). In addition, the branched structure of neokestose, a type of neo‑FOS, confers improved chemical stability compared with conventional FOS; therefore, the investigation of the branched structure by the present study may be of high biomedical value. The present study aimed to determine whether neokestose may suppress growth of the A2058 melanoma cell line. The cells were initially treated with neokestose; subsequently, in vitro cytotoxicity was assessed using MTT, and cell cycle progression and apoptosis were detected using flow cytometry...
May 17, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28534926/asymmetric-bead-aggregation-for-microfluidic-immunodetection
#3
Sunggu Kim, Sanghoon Han, Junghoon Lee
We report an asymmetric immunoaggregation assay for rapid, label-free, and sub-picomolar protein detection. Asymmetric immunoaggregated beads (AIBs) are formed when binding occurs between 1 μm magnetic (MG) and 2.8 μm polystyrene (PS) beads coated with specific antibodies for a target antigen. Detection of such aggregation is achieved by optical monitoring of AIBs in a flow under an external magnetic field. AIBs are attracted to the upper surface of the microchannel by a magnetic field and made to slide along the surface by a flow drag force...
May 23, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28534754/the-icvsie-a-general-purpose-integral-equation-method-for-bio-electromagnetic-analysis
#4
Luis J Gomez, Abdulkadir C Yucel, Eric Michielssen
An internally combined volume surface integral equation (ICVSIE) for analyzing electromagnetic (EM) interactions with biological tissue and wide ranging diagnostic, therapeutic, and research applications, is proposed. METHOD: The ICVSIE is a system of integral equations in terms of volume and surface equivalent currents in biological tissue subject to fields produced by externally or internally positioned devices. The system is created by using equivalence principles and solved numerically; the resulting current values are used to evaluate scattered and total electric fields, specific absorption rates, and related quantities...
May 16, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28534676/applications-of-raman-spectroscopy-in-biopharmaceutical-manufacturing-a-short-review
#5
Kevin Buckley, Alan G Ryder
The production of active pharmaceutical ingredients (APIs) is currently undergoing its biggest transformation in a century. The changes are based on the rapid and dramatic introduction of protein- and macromolecule-based drugs (collectively known as biopharmaceuticals) and can be traced back to the huge investment in biomedical science (in particular in genomics and proteomics) that has been ongoing since the 1970s. Biopharmaceuticals (or biologics) are manufactured using biological-expression systems (such as mammalian, bacterial, insect cells, etc...
June 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28532328/pharmaceutical-entanglements-an-analysis-of-the-multiple-determinants-of-adhd-medication-effects-in-a-chilean-school
#6
Sebastian Rojas Navarro, Scott Vrecko
This article draws upon findings from ethnographic fieldwork conducted in a Chilean school to explore how the effects of globally circulating ADHD medications emerge within the localized contexts of everyday users. An analysis of observations of children on ADHD medications within classroom settings is developed which challenges the assumption, pervasive within biomedical paradigms, that the effects of such medications can be understood as resulting directly from their chemical properties and biological modes of action...
June 2017: International Journal of Qualitative Studies on Health and Well-being
https://www.readbyqxmd.com/read/28532044/pancreatic-differentiation-of-induced-pluripotent-stem-cells-in-activin-a-grafted-gelatin-poly-lactide-co-glycolide-nanoparticle-scaffolds-with-induction-of-ly294002-and-retinoic-acid
#7
Yung-Chih Kuo, Yu-Chuan Liu, Rajendiran Rajesh
The differentiation of induced pluripotent stem cells (iPSCs) in biomaterial scaffolds is an emerging area for biomedical applications. This study proposes, for the first time, the production of pancreatic cells from iPSCs in gelatin-poly(lactide-co-glycolide) nanoparticle (PLGA NP) scaffolds. The porosity and swelling ratio of the scaffolds decreased with increases in gelatin and PLGA NP concentrations. The adhesion efficiency of iPSCs in gelatin-PLGA NP scaffolds was found to be higher at 6.7% (w/w) PLGA NP...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531999/zro2-toughened-al2o3-based-near-net-shaped-femoral-head-unique-fabrication-approach-3d-microstructure-burst-strength-and-muscle-cell-response
#8
Debasish Sarkar, Sourav Mandal, B S Reddy, Nitu Bhaskar, D C Sundaresh, Bikramjit Basu
The development of reliable biomedical devices demands the use of an integrated manufacturing protocol with comprehensive understanding of prototype characterization in terms of 3D microstructural analysis along with biocompatibility. While addressing these issues for ZrO2 (3mol% Y2O3 stabilized)-toughened Al2O3-based femoral head prototypes, the present work reports a unique fabrication protocol involving a sequence of uniaxial compaction followed by pre-sintering, machining, final sintering and polishing to ensure dimensional tolerance with respect to the design of patient-specific femoral head...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28530480/ultrasonographic-and-histological-evaluation-of-the-effects-of-long-term-carotid-catheterization-on-cardiac-function-in-nmri-mice
#9
Anne C Teilmann, Morten B Thomsen, Elizabeth A Ihms, Nathan Pate, Jann Hau, Klas Abelson
Catheterization of laboratory mice is commonly performed in biomedical research to infuse substances and for blood sampling. One approach is to catheterize the right common carotid artery and advance the catheter until the tip is positioned in the aorta or the proximal brachiocephalic trunk. Owing to the small body size of the mouse, a catheter tends to occupy a great part of even the larger vessel lumens, and this may increase vascular resistance with potential pathophysiological impacts on the heart. The present study compared cardiac function of catheterized mice, with catheter tip placement in the brachiocephalic trunk, with sham-operated mice and non-operated control mice...
January 1, 2017: Laboratory Animals
https://www.readbyqxmd.com/read/28530189/marinobacter-lipolyticus-from-red-sea-for-lipase-production-and-modulation-of-silver-nanomaterials-for-anti-candidal-activities
#10
Mohammad Oves, Huda A Qari, Nadeen M Felemban, Mohammad Z Khan, Zulfiqar A Rehan, Iqbal M I Ismail
In this study, the bacterial strain CEES 33 was isolated from the coastal area of the Red Sea, Jeddah, Kingdom of Saudi Arabia. The bacterium isolate was identified and characterized by using biochemical and molecular methods. The isolate CEES 33 has been identified as Gram-negative rod shaped and cream pigmented spherical colonies. It also demonstrated a positive result for nitrate reduction, oxidase, catalase, citrate utilization, lipase and exopolysaccharide production. Strain CEES 33 was characterized at the molecular level by partial 16S rRNA sequencing and it has been identified as Marinobacter lipolyticus (EMBL|LN835275...
June 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/28529087/a-critical-analysis-of-australian-policies-and-guidelines-for-water-immersion-during-labour-and-birth
#11
Megan Cooper, Helen McCutcheon, Jane Warland
BACKGROUND: Accessibility of water immersion for labour and/or birth is often dependent on the care provider and also the policies/guidelines that underpin practice. With little high quality research about the safety and practicality of water immersion, particularly for birth, policies/guidelines informing the practice may lack the evidence necessary to ensure practitioner confidence surrounding the option thereby limiting accessibility and women's autonomy. AIM: The aims of the study were to determine how water immersion policies and/or guidelines are informed, who interprets the evidence to inform policies/guidelines and to what extent the policy/guideline facilitates the option for labour and birth...
May 18, 2017: Women and Birth: Journal of the Australian College of Midwives
https://www.readbyqxmd.com/read/28528855/patterns-of-recent-national-institutes-of-health-nih-funding-to-diagnostic-radiology-departments-analysis-using-the-nih-reporter-system
#12
Ana M Franceschi, Andrew B Rosenkrantz
RATIONALE AND OBJECTIVES: This study aimed to characterize recent National Institutes of Health (NIH) funding for diagnostic radiology departments at US medical schools. MATERIALS AND METHODS: This retrospective study did not use private identifiable information and thus did not constitute human subjects research. The public NIH Research Portfolio Online Reporting Tools Expenditure and Results system was used to extract information regarding 887 NIH awards in 2015 to departments of "Radiation-Diagnostic/Oncology...
May 18, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28527892/outbreak-of-zika-virus-infection-in-singapore-an-epidemiological-entomological-virological-and-clinical-analysis
#13
(no author information available yet)
BACKGROUND: An outbreak of Zika virus infection was detected in Singapore in August, 2016. We report the first comprehensive analysis of a national response to an outbreak of Zika virus infection in Asia. METHODS: In the first phase of the outbreak, patients with suspected Zika virus infection were isolated in two national referral hospitals until their serum tested negative for the virus. Enhanced vector control and community engagement measures were deployed in disease clusters, including stepped-up mosquito larvicide and adulticide use, community participation in source reduction (destruction of mosquito breeding sites), and work with the local media to promote awareness of the outbreak...
May 17, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28527412/early-stage-detection-of-ve-cadherin-during-endothelial-differentiation-of-human-mesenchymal-stem-cells-using-spr-biosensor
#14
Farzaneh Fathi, Aysa Rezabakhsh, Reza Rahbarghazi, Mohammad-Reza Rashidi
Surface plasmon resonance (SPR) biosensors are most commonly applied for real-time dynamic analysis and measurement of interactions in bio-molecular studies and cell-surface analysis without the need for labeling processes. Up to present, SPR application in stem cell biology and biomedical sciences was underused. Herein, a very simple and sensitive method was developed to evaluate human mesenchymal stem cells trans-differentiation to endothelial lineage of over a period of 14 days based on VE-cadherin biomarker...
May 10, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28527187/quantitative-stereological-analysis-of-the-highly-porous-hydroxyapatite-scaffolds-using-x-ray-cm-and-sem
#15
Justyna Zygmuntowicz, Aneta Zima, Joanna Czechowska, Karol Szlazak, Anna Ślosarczyk, Katarzyna Konopka
BACKGROUND: Material properties of the scaffolds as well as their microstructure are vital in determining in vivo cellular response. Three-dimensional (3D), highly porous scaffolds are used in tissue engineering to provide a suitable microenvironment and to support regeneration of bone. Both pore sizes and their architecture, in particular interconnection density, impact functionality of scaffold during its biomedical applications. OBJECTIVE: In this paper a comparative study of the microstructure of highly porous hydroxyapatite scaffolds produced via gelcasting of foamed slurries and replication of polyurethane sponge were carried out...
2017: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/28525526/critical-analysis-of-the-council-for-international-organizations-of-medical-sciences-2016-international-guidelines-for-health-related-research-involving-humans
#16
REVIEW
Miguel Hugo Kottow Lang
This paper presents a preliminary discussion of the Council for International Organizations of Medical Sciences (CIOMS), recently issued “International Ethical Guidelines for Health-related Research Involving Humans” (2016) that acknowledges the document’s declared concern of the protection of human subjects and awareness of their needs and interests in “low-resource settings”. Nevertheless, guideline recommendations present exceptional situations –vulnerability, mental incompetence- wherein voluntary and consented participation may be reduced or omitted under three concurrent conditions: compelling scientific value, the need to include persons that will not benefit directly from participation, exposure to minimal or slight risks...
May 15, 2017: Medwave
https://www.readbyqxmd.com/read/28525323/values-of-apoptosis-of-lymphocytes-and-granulocytes-in-peripheral-blood-of-polish-mixed-breed-rabbits-in-the-annual-cycle
#17
B Tokarz-Deptuła, B Hukowska-Szematowicz, P Niedźwiedzka-Rystwej, A Trzeciak-Ryczek, W Deptuła
The objective of the study was to determine values of apoptosis for peripheral blood lymphocytes and granulocytes, including dependency on the season of the year, in Polish mixed-breed rabbits and in mixed-breed rabbits with the addition of blood of meat-breed rabbits. The study was carried out in four seasons of the year (spring, summer, autumn, winter) involving 120 Polish mixed-breed rabbits - group I, and 120 Polish mixed-breed rabbits with addition of meat-breed rabbit blood - group II. Assessment of apoptosis of lymphocytes and granulocytes was performed using as FACScan cytometer by Becton Dickinson with FACSDiva software (USA), using as ApoFluor® Green Caspase reagent kit (MP Biomedicals, USA) to detect the activity of the total caspase pool 1, 3, 4, 5, 6, 7, 8, 9 in granulocytes and lymphocytes of rabbit peripheral blood...
March 28, 2017: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28524252/in-vivo-noninvasive-analysis-of-graphene-nanomaterial-pharmacokinetics-using-photoacoustic-flow-cytometry
#18
Dmitry A Nedosekin, Jacqueline Nolan, Chengzhong Cai, Shawn E Bourdo, Zeid Nima, Alexandru S Biris, Vladimir P Zharov
Graphene-based nanomaterials (GBNs) are quickly revolutionizing modern electronics, energy generation and storage, clothing and biomedical devices. Due to GBN's variety of physical and chemical parameters that define their toxicity and their aggregation in suspension, interpreting its toxicology without accurate information on graphene's distribution and behavior in live organisms is challenging. In this work, we present a laser-based optical detection methodology for noninvasive detection and pharmacokinetics analysis of GBNs directly in blood flow in mice using in vivo photoacoustic (PA) flow cytometry (PAFC)...
May 19, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28524030/-preventive-effect-of-vitamin-b-supplementation-on-recurrent-stroke-a-meta-analysis
#19
Guining Dai, Hongzhen Du, Hongmin Wang, Yujia Wei, Ying Xie, Zengning Li
OBJECTIVE: To evaluate whether Vitamin B supplementation could prevent ischemic stroke recurrence. METHODS: Randomized controlled trials (RCTs) observing Vitamin B supplementation in patients with stroke was performed in databases including ScienceDirect, PubMed/Medline, China National Knowledge Infrastructure, Chinese Biomedical Data-Base, Wanfang Database, and VIP Chinese Science and Technology Journal Database to find related studies in English or Chinese published before August 2016...
May 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28523700/balancing-medical-accuracy-and-diagnostic-consequences-diagnosing-medically-unexplained-symptoms-in-primary-care
#20
Erik B Rasmussen
Focusing on the case of medically unexplained symptoms (MUS), this article explores diagnostic classification in the absence of biomedical evidence or other strong medical warrants for diagnosis. The data are from three focus group interviews with Norwegian general practitioners (GPs) conducted in 2015, that centred on the issue of what diagnoses to use (or not) for MUS. The qualitative analysis reconstructs the logic underlying GPs' diagnostic accounts, which centred on the meaning of diagnostic categories and on anticipating how 'generalised others' would respond to those meanings (called 'diagnosing by anticipation')...
May 18, 2017: Sociology of Health & Illness
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