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https://www.readbyqxmd.com/read/29160307/a-non-canonical-notch-complex-regulates-adherens-junctions-and-vascular-barrier-function
#1
William J Polacheck, Matthew L Kutys, Jinling Yang, Jeroen Eyckmans, Yinyu Wu, Hema Vasavada, Karen K Hirschi, Christopher S Chen
The vascular barrier that separates blood from tissues is actively regulated by the endothelium and is essential for transport, inflammation, and haemostasis1. Haemodynamic shear stress plays a critical role in maintaining endothelial barrier function2, but how this occurs remains unknown. Here, using an engineered organotypic model of perfused microvessels and confirming in mouse models, we identify that activation of the Notch1 transmembrane receptor directly regulates vascular barrier function through a non-canonical, transcription independent signalling mechanism that drives adherens junction assembly...
November 13, 2017: Nature
https://www.readbyqxmd.com/read/29158703/vapour-phase-method-in-the-synthesis-of-polymer-ibuprofen-sodium-silica-gel-composites
#2
Agnieszka Kierys, Patrycja Krasucka, Marta Grochowicz
The study discusses the synthesis of polymer-silica composites comprising water soluble drug (ibuprofen sodium, IBS). The polymers selected for this study were poly(TRIM) and poly(HEMA-co-TRIM) produced in the form of permanently porous beads via the suspension-emulsion polymerization method. The acid and base set ternary composites were prepared by the saturation of the solid dispersions of drug (poly(TRIM)-IBS and/or poly(HEMA-co-TRIM)-IBS) with TEOS, and followed by their exposition to the vapour mixture of water and ammonia, or water and hydrochloric acid, at autogenous pressure...
November 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/29158081/streptococcus-pyogenes-nuclease-a-spna-mediated-virulence-does-not-exclusively-depend-on-nuclease-activity
#3
Callum Chalmers, Adrina Hema J Khemlani, Chae Ryeong Sohn, Jacelyn Mei San Loh, Catherine Jia-Yun Tsai, Thomas Proft
BACKGROUND: Streptococcus pyogenes, or Group A Streptococcus (GAS), is a human pathogen that causes a wide range of diseases, including pharyngitis, necrotizing fasciitis and toxic shock syndrome. The bacterium produces a large arsenal of virulence factors, including the cell wall-anchored Streptococcus pyogenes nuclease A (SpnA), which facilitates immune evasion by degrading the DNA backbone of neutrophil extracellular traps. SpnA consists of a C-terminal endo/exonuclease domain and a N-terminal domain of unknown function...
November 13, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/29153726/bioindicators-for-monitoring-marine-litter-ingestion-and-its-impacts-on-mediterranean-biodiversity
#4
REVIEW
Maria Cristina Fossi, Cristina Pedà, Montserrat Compa, Catherine Tsangaris, Carme Alomar, Francoise Claro, Christos Ioakeimidis, Francois Galgani, Tatjana Hema, Salud Deudero, Teresa Romeo, Pietro Battaglia, Franco Andaloro, Ilaria Caliani, Silvia Casini, Cristina Panti, Matteo Baini
The Mediterranean Sea has been described as one of the most affected areas by marine litter in the world. Although effects on organisms from marine plastic litter ingestion have been investigated in several oceanic areas, there is still a lack of information from the Mediterranean Sea. The main objectives of this paper are to review current knowledge on the impact of marine litter on Mediterranean biodiversity, to define selection criteria for choosing marine organisms suitable for use as bioindicator species, and to propose a methodological approach to assessing the harm related to marine litter ingestion in several Mediterranean habitats and sub-regions...
November 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29147069/expression-profiling-of-long-noncoding-rna-splice-variants-in-human-microvascular-endothelial-cells-lipopolysaccharide-effects-in-vitro
#5
Imran H Chowdhury, Hema P Narra, Abha Sahni, Kamil Khanipov, Casey L C Schroeder, Jignesh Patel, Yuriy Fofanov, Sanjeev K Sahni
Endothelial cell interactions with lipopolysaccharide (LPS) involve both activating and repressing signals resulting in pronounced alterations in their transcriptome and proteome. Noncoding RNAs are now appreciated as posttranscriptional and translational regulators of cellular signaling and responses, but their expression status and roles during endothelial interactions with LPS are not well understood. We report on the expression profile of long noncoding (lnc) RNAs of human microvascular endothelial cells in response to LPS...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/29144726/physalis-mottle-virus-like-particles-as-nanocarriers-for-imaging-reagents-and-drugs
#6
Hema Masarapu, Bindi K Patel, Paul L Chariou, He Hu, Neetu M Gulati, Bradley L Carpenter, Reza A Ghiladi, Sourabh Shukla, Nicole F Steinmetz
Platform technologies based on plant virus nanoparticles (VNPs) and virus-like particles (VLPs) are attracting the attention of researchers and clinicians because the particles are biocompatible, biodegradable, noninfectious in mammals, and can readily be chemically and genetically engineered to carry imaging agents and drugs. When the Physalis mottle virus (PhMV) coat protein is expressed in Escherichia coli, the resulting VLPs are nearly identical to the viruses formed in vivo. Here, we isolated PhMV-derived VLPs from ClearColi cells and carried out external and internal surface modification with fluorophores using reactive lysine-N-hydroxysuccinimide ester and cysteine-maleimide chemistries, respectively...
November 16, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/29141590/health-nutrition-and-development-of-children-born-preterm-and-low-birth-weight-in-rural-rwanda-a-cross-sectional-study
#7
Catherine M Kirk, Jean Claude Uwamungu, Kim Wilson, Bethany L Hedt-Gauthier, Neo Tapela, Peter Niyigena, Christian Rusangwa, Merab Nyishime, Evrard Nahimana, Fulgence Nkikabahizi, Christine Mutaganzwa, Eric Ngabireyimana, Francis Mutabazi, Hema Magge
BACKGROUND: As care for preterm and low birth weight (LBW) infants improves in resource-limited settings, more infants are surviving the neonatal period. Preterm and (LBW) infants are at high-risk of nutritional and medical comorbidities, yet little is known about their developmental outcomes in low-income countries. This study evaluated the health, nutritional, and developmental status of preterm/LBW children at ages 1-3 years in Rwanda. METHODS: Cross-sectional study of preterm/LBW infants discharged between October 2011 and October 2013 from a hospital neonatal unit in rural Rwanda...
November 15, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/29141578/nanoparticles-in-drug-delivery-systems
#8
Sandeep Rathor, D C Bhatt, Shaikh Aamir, Hema Chaudhary, Vikash Kumar
Development of effective drug delivery system is important for medicine and healthcare. Nanoparticles (NPs) in medicine have become new revolution in the field of drug delivery system as it helps to overcome the limitations of conventional drug delivery systems. Various nanostructures- including SLSs, liposomes, polymers, dendrimers, NLC, LDC, Magnetic NPs, LLCs, Polymeric nanocrystals, polymeric NPs, and Superparamagnetic NPs, have been tested as a carrier in drug delivery system. The object of this review to covering the delivery of various potential drugs and biomolecules by means of polymeric nanoparticles, dendrimers and magnetic nanoparticles with describing the methods of formulation development...
November 13, 2017: Pharmaceutical Nanotechnology
https://www.readbyqxmd.com/read/29140278/development-of-gallic-acid-modified-hydrogels-using-interpenetrating-chitosan-network-and-evaluation-of-their-antioxidant-activity
#9
Byungman Kang, Temmy Pegarro Vales, Byoung-Ki Cho, Jong-Ki Kim, Ho-Joong Kim
In this work, antioxidant hydrogels were prepared by the construction of an interpenetrating chitosan network and functionalization with gallic acid. The poly(2-hydroxyethyl methacrylate) p(HEMA)-based hydrogels were first synthesized and subsequently surface-modified with an interpenetrating polymer network (IPN) structure prepared with methacrylamide chitosan via free radical polymerization. The resulting chitosan-IPN hydrogels were surface-functionalized with gallic acid through an amide coupling reaction, which afforded the antioxidant hydrogels...
November 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29121523/spectroscopic-studies-of-the-silicone-oil-impact-on-the-ophthalmic-hydrogel-based-materials-conducted-in-time-dependent-mode
#10
Kordian Chamerski, Marcin Stopa, Piotr Jelen, Magdalena Lesniak, Maciej Sitarz, Jacek Filipecki
Silicone oil is the one of the artificial materials used in vitreoretinal surgery for retinal detachment treatment. Since the silicone oil is sometimes applied along with intraocular lens (IOL) implantation the direct influence of silicone oil on the artificial implant should be taken into account. Presented study was performed in order to determine the time-dependent impact of silicone oil on hydrogel based ophthalmic materials. Two kinds of IOLs based on hydroxyethyl 2-methacrylate (HEMA) hydrogel material were immersed in silicone oil based on linear poly(dimethylsiloxane) (PDMS)...
October 18, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29118233/hairy-cell-leukemia-version-2-2018-nccn-clinical-practice-guidelines-in-oncology
#11
William G Wierda, John C Byrd, Jeremy S Abramson, Seema Bhat, Greg Bociek, Danielle Brander, Jennifer Brown, Asher Chanan-Khan, Steve E Coutre, Randall S Davis, Christopher D Fletcher, Brian Hill, Brad S Kahl, Manali Kamdar, Lawrence D Kaplan, Nadia Khan, Thomas J Kipps, Jeffrey Lancet, Shuo Ma, Sami Malek, Claudio Mosse, Mazyar Shadman, Tanya Siddiqi, Deborah Stephens, Nina Wagner, Andrew D Zelenetz, Mary A Dwyer, Hema Sundar
Hairy cell leukemia (HCL) is a rare type of indolent B-cell leukemia, characterized by symptoms of fatigue and weakness, organomegaly, pancytopenia, and recurrent opportunistic infections. Classic HCL should be considered a distinct clinical entity separate from HCLvariant (HCLv), which is associated with a more aggressive disease course and may not respond to standard HCL therapies. Somatic hypermutation in the IGHV gene is present in most patients with HCL. The BRAF V600E mutation has been reported in most patients with classic HCL but not in those with other B-cell leukemias or lymphomas...
November 2017: Journal of the National Comprehensive Cancer Network: JNCCN
https://www.readbyqxmd.com/read/29117238/tdf-and-quantitative-ultrasound-bone-quality-in-african-patients-on-second-line-art-anrs-12169-2lady-sub-study
#12
Firmin Nongodo Kabore, Sabrina Eymard-Duvernay, Jacques Zoungrana, Stéphanie Badiou, Guillaume Bado, Arsène Héma, Assane Diouf, Eric Delaporte, Sinata Koulla-Shiro, Laura Ciaffi, Amandine Cournil
BACKGROUND: Bone demineralization, which leads to osteoporosis and increased fracture risk, is a common metabolic disorder in HIV-infected individuals. In this study, we aimed to assess the change in bone quality using quantitative ultrasound (QUS) over 96 weeks of follow-up after initiation of second-line treatment, and to identify factors associated with change in bone quality. METHODS AND FINDINGS: In a randomized trial (ANRS 12169), TDF and PI-naïve participants failing standard first-line treatment, from Burkina Faso, Cameroon, and Senegal were randomized to receive either TDF/FTC/LPVr, ABC/ddI/LPVr or TDF/FTC/DRVr...
2017: PloS One
https://www.readbyqxmd.com/read/29117065/reduced-ganglion-cell-volume-on-optical-coherence-tomography-in-patients-with-geographic-atrophy
#13
Hema L Ramkumar, Brian Nguyen, Dirk-Uwe Bartsch, Luke J Saunders, Ilkay Kilic Muftuoglu, Qisheng You, William R Freeman
PURPOSE: Geographic atrophy (GA) is the sequelae of macular degeneration. Automated inner retinal analysis using optical coherence tomography is flawed because segmentation software is calibrated for normal eyes. The purpose of this study is to determine whether ganglion cell layer (GCL) volume is reduced in GA using manual analysis. METHODS: Nineteen eyes with subfoveal GA and 22 controls were selected for morphometric analyses. Heidelberg scanning laser ophthalmoscope optical coherence tomography images of the optic nerve and macula were obtained, and the Viewing Module was used to manually calibrate retinal layer segmentation...
November 7, 2017: Retina
https://www.readbyqxmd.com/read/29099794/hydrogel-film-immobilized-lactobacillus-brevis-rk03-for-%C3%AE-aminobutyric-acid-production
#14
Yi-Huang Hsueh, Wen-Chang Liaw, Jen-Min Kuo, Chi-Shin Deng, Chien-Hui Wu
Hydrogels of 2-hydroxyethyl methacrylate/polyethylene glycol diacrylate (HEMA/PEGDA) have been extensively studied for their use in biomedical and pharmaceutical applications owing to their nontoxic and highly hydrophilic characteristics. Recently, cells immobilized by HEMA/PEGDA hydrogels have also been studied for enhanced production in fermentation. Hydrogel films of HEMA/PEGDA copolymer were generated by Ultraviolet (UV)-initiated photopolymerization. The hydrogel films were used to immobilize viable Lactobacillus brevis RK03 cells for the bioconversion of monosodium glutamate (MSG) to γ-aminobutyric acid (GABA)...
November 3, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29090672/an-overview-on-applications-of-gold-nanoparticle-for-early-diagnosis-and-targeted-drug-delivery-to-prostate-cancer
#15
Ravi Shankaran Dhesingh, S Thambiraj, S Hema
BACKGROUND: Carcinoma of the prostate gland (PCa) is one of the most commonly diagnosed cancer diseases among men around the world. PCa has become the major considerable health and epidemic problem which causes death in men with a high prevalence and relatively lower mortality risk. The inability of conventional diagnosis tools to detect cancer at an early and potentially curable stage further hinders effective treatment options and spur demand for improved technologies. Nanoparticles are emerging as a versatile tool for disease diagnosis to therapy...
November 1, 2017: Recent Patents on Nanotechnology
https://www.readbyqxmd.com/read/29082519/outcomes-of-adults-and-children-with-primary-mediastinal-b-cell-lymphoma-treated-with-dose-adjusted-epoch-r
#16
Lisa Giulino-Roth, Tara O'Donohue, Zhengming Chen, Nancy L Bartlett, Ann LaCasce, William Martin-Doyle, Matthew J Barth, Kimberly Davies, Kristie A Blum, Beth Christian, Carla Casulo, Sonali M Smith, James Godfrey, Amanda Termuhlen, Matthew J Oberley, Sarah Alexander, Sheila Weitzman, Burton Appel, Benjamin Mizukawa, Jakub Svoboda, Zeinab Afify, Melinda Pauly, Hema Dave, Rebecca Gardner, Deborah M Stephens, William A Zeitler, Christopher Forlenza, Jennifer Levine, Michael E Williams, Jody L Sima, Catherine M Bollard, John P Leonard
Treatment with dose-adjusted EPOCH (etoposide, doxorubicin, cyclophosphamide, vincristine, prednisone) chemotherapy and rituximab (DA-EPOCH-R) has become the standard of care for primary mediastinal B-cell lymphoma (PMBCL) at many institutions despite limited data in the multi-centre setting. We report a large, multi-centre retrospective analysis of children and adults with PMBCL treated with DA-EPOCH-R to characterize outcomes and evaluate prognostic factors. We assessed 156 patients with PMBCL treated with DA-EPOCH-R across 24 academic centres, including 38 children and 118 adults...
October 29, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/29079419/epalrestat-loaded-silicone-hydrogels-as-contact-lenses-to-address-diabetic-eye-complications
#17
Fernando Alvarez-Rivera, Angel Concheiro, Carmen Alvarez-Lorenzo
Most treatments for diabetic eye conditions rely on systemic (oral) or intravitreal administration, and there is still a demand of efficient and comfortable ocular dosage forms. Our purpose was to design contact lenses (CLs) suitable for local prophylaxis/treatment of diabetes-related ocular pathologies, by means of the incorporation of bioinspired functional groups that can reversibly interact with epalrestat, an aldose reductase inhibitor. Several sets of silicone hydrogels were synthesized varying the contents in 2-hydroxyethyl methacrylate (HEMA), monomethacryloxypropyl-sym-polydimethylsiloxane hydroxypropyl terminated (MCS-MC12), and aminopropyl methacrylamide (APMA)...
October 24, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/29075619/modulating-the-global-response-regulator-luxo-of-v-cholerae-quorum-sensing-system-using-a-pyrazine-dicarboxylic-acid-derivative-pdca-py-an-antivirulence-approach
#18
M Hema, Sahana Vasudevan, P Balamurugan, S Adline Princy
Vibrio cholerae is a Gram-negative pathogen which causes acute diarrhoeal disease, cholera by the expression of virulence genes through quorum sensing (QS) mechanism. The QS circuit of V. cholerae is controlled by the global quorum regulator, LuxO, which at low cell density (LCD) state produces major virulence factors such as, toxin co-regulated pilus (TCP) and cholera toxin (CT) to mediate infection. On the contrary, at the high cell density (HCD) state the virulent genes are downregulated and the vibrios are detached from the host intestinal epithelial cells, promoted by HapA protease...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29062892/defect-passivation-of-transition-metal-dichalcogenides-via-a-charge-transfer-van-der-waals-interface
#19
Jun Hong Park, Atresh Sanne, Yuzheng Guo, Matin Amani, Kehao Zhang, Hema C P Movva, Joshua A Robinson, Ali Javey, John Robertson, Sanjay K Banerjee, Andrew C Kummel
Integration of transition metal dichalcogenides (TMDs) into next-generation semiconductor platforms has been limited due to a lack of effective passivation techniques for defects in TMDs. The formation of an organic-inorganic van der Waals interface between a monolayer (ML) of titanyl phthalocyanine (TiOPc) and a ML of MoS2 is investigated as a defect passivation method. A strong negative charge transfer from MoS2 to TiOPc molecules is observed in scanning tunneling microscopy. As a result of the formation of a van der Waals interface, the ION/IOFF in back-gated MoS2 transistors increases by more than two orders of magnitude, whereas the degradation in the photoluminescence signal is suppressed...
October 2017: Science Advances
https://www.readbyqxmd.com/read/29057074/consensus-based-approach-to-develop-a-measurement-framework-and-identify-a-core-set-of-indicators-to-track-implementation-and-progress-towards-effective-coverage-of-facility-based-kangaroo-mother-care
#20
Tanya Guenther, Sarah Moxon, Bina Valsangkar, Greta Wetzel, Juan Ruiz, Kate Kerber, Hannah Blencowe, Queen Dube, Shashi N Vani, Donna Vivio, Hema Magge, Socorro De Leon-Mendoza, Janna Patterson, Goldy Mazia
BACKGROUND: As efforts to scale up the delivery of Kangaroo Mother Care (KMC) in facilities are increasing, a standardized approach to measure implementation and progress towards effective coverage is needed. Here, we describe a consensus-based approach to develop a measurement framework and identify a core set of indicators for monitoring facility-based KMC that would be feasible to measure within existing systems. METHODS: The KMC measurement framework and core list of indicators were developed through: 1) scoping exercise to identify potential indicators through literature review and requests from researchers and program implementers; and 2) face-to-face consultations with KMC and measurement experts working at country and global levels to review candidate indicators and finalize selection and definitions...
December 2017: Journal of Global Health
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