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https://www.readbyqxmd.com/read/28526468/-a-comparison-of-three-different-needles-used-for-spinal-anesthesia-in-terms-of-squamous-epithelial-cell-transport-risk
#1
Ünal Kantekin Çiğdem, Şahin Sevinç, Bolat Esef, Öztürk Süreyya, Gencer Muzaffer, Demirel Akif
BACKGROUND AND OBJECTIVES: To investigate the differences in the number of squamous epithelial cells carried to the spinal canal by three different types of spinal needle tip of the same size. METHODS: Patients were allocated into three groups (Group I, Group II, Group III). Spinal anesthesia was administered to Group I (n=50) using a 25G Quincke needle, to Group II (n=50) using a 25G pencil point spinal needle, and to Group III (n=50) using a non-cutting atraumatic needle with special bending...
May 16, 2017: Revista Brasileira de Anestesiologia
https://www.readbyqxmd.com/read/28522963/the-f-actin-binding-protein-cortactin-regulates-the-dynamics-of-the-exocytotic-fusion-pore-through-its-sh3-domain
#2
Arlek M González-Jamett, María J Guerra, María J Olivares, Valentina Haro-Acuña, Ximena Baéz-Matus, Jacqueline Vásquez-Navarrete, Fanny Momboisse, Narcisa Martinez-Quiles, Ana M Cárdenas
Upon cell stimulation, the network of cortical actin filaments is rearranged to facilitate the neurosecretory process. This actin rearrangement includes both disruption of the preexisting actin network and de novo actin polymerization. However, the mechanism by which a Ca(2+) signal elicits the formation of new actin filaments remains uncertain. Cortactin, an actin-binding protein that promotes actin polymerization in synergy with the nucleation promoting factor N-WASP, could play a key role in this mechanism...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28522698/oligogalacturonic-acid-inhibits-vascular-calcification-by-two-mechanisms-inhibition-of-vascular-smooth-muscle-cell-osteogenic-conversion-and-interaction-with-collagen
#3
Ahmed Hodroge, Eric Trécherel, Marjorie Cornu, Walaa Darwiche, Ali Mansour, Katia Ait-Mohand, Thomas Verissimo, Cathy Gomila, Carole Schembri, Sophie Da Nascimento, Redouan Elboutachfaiti, Agnès Boullier, Emmanuel Lorne, Josiane Courtois, Emmanuel Petit, Sylvestre Toumieux, José Kovensky, Pascal Sonnet, Ziad A Massy, Saïd Kamel, Claire Rossi, Jérôme Ausseil
OBJECTIVE: Cardiovascular diseases constitute the leading cause of mortality worldwide. Calcification of the vessel wall is associated with cardiovascular morbidity and mortality in patients having many diseases, including diabetes mellitus, atherosclerosis, and chronic kidney disease. Vascular calcification is actively regulated by inductive and inhibitory mechanisms (including vascular smooth muscle cell adaptation) and results from an active osteogenic process. During the calcification process, extracellular vesicles (also known as matrix vesicles) released by vascular smooth muscle cells interact with type I collagen and then act as nucleating foci for calcium crystallization...
May 18, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28521107/formation-of-fluorohydroxyapatite-with-silver-diamine-fluoride
#4
M L Mei, F Nudelman, B Marzec, J M Walker, E C M Lo, A W Walls, C H Chu
Silver diamine fluoride (SDF) is found to promote remineralization and harden the carious lesion. Hydroxyapatite crystallization is a crucial process in remineralization; however, the role of SDF in crystal formation is unknown. We designed an in vitro experiment with calcium phosphate with different SDF concentrations (0.38, 1.52, 2.66, 3.80 mg/mL) to investigate the effect of this additive on the nucleation and growth of apatite crystals. Two control groups were also prepared-calcium phosphate (CaCl2·2H2O + K2HPO4 in buffer solution) and SDF (Ag[NH3]2F in buffer solution)...
May 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28516118/quantitative-measurements-of-hiv-1-and-dextran-capture-by-human-monocyte-derived-dendritic-cells-mddcs
#5
Mickaël M Ménager, Dan R Littman
The aim of this protocol is to describe how to measure and quantify the amount of HIV-1 particles and dextran molecules internalized in human monocyte derived dendritic cells (MDDCs), using three different techniques: flow cytometry, quantitative PCR and confocal microscopy. BACKGROUND: This protocol was developed in order to assess the changes of HIV-1 internalization upon disruption of actin nucleation in human monocyte derived dendritic cells. Following a shRNA screen to identify genes important for HIV-1 transfer from dendritic cells to T cells, we observed that a disruption of actin nucleation leads to a switch from actin rich dendrites to blebs, due to an excess of actomyosin contraction...
November 20, 2016: Bio-protocol
https://www.readbyqxmd.com/read/28516116/asc-particle-induced-peritonitis
#6
Lucia de Almeida, Andrea Dorfleutner, Christian Stehlik
In response to pathogen infection and tissue damage, inflammasome sensors such as NLRP3 and AIM2 are activated, which triggers PYRIN domain (PYD)-mediated ASC nucleation, followed by self-perpetuating ASC polymerization, which ultimately culminates in caspase-1 activation, interleukin (IL)-1β and IL-18 processing and release and pyroptosis (Ratsimandresy et al., 2013; Cai et al., 2014). Inflammasomes release not only cytokines, but also the polymeric ASC danger particles (pASC) by pyroptosis, which perpetuate and propagate inflammasome responses to bystander cells to engage cell intrinsic ASC and caspase-1 (Baroja-Mazo et al...
October 5, 2016: Bio-protocol
https://www.readbyqxmd.com/read/28515450/microfluidic-sorting-of-cells-by-viability-based-on-differences-in-cell-stiffness
#7
Muhymin Islam, Hannah Brink, Syndey Blanche, Caleb DiPrete, Tom Bongiorno, Nicholas Stone, Anna Liu, Anisha Philip, Gonghao Wang, Wilbur Lam, Alexander Alexeev, Edmund K Waller, Todd Sulchek
The enrichment of viable cells is an essential step to obtain effective products for cell therapy. While procedures exist to characterize the viability of cells, most methods to exclude nonviable cells require the use of density gradient centrifugation or antibody-based cell sorting with molecular labels of cell viability. We report a label-free microfluidic technique to separate live and dead cells that exploits differences in cellular stiffness. The device uses a channel with repeated ridges that are diagonal with respect to the direction of cell flow...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28514442/architecture-of-the-human-interactome-defines-protein-communities-and-disease-networks
#8
Edward L Huttlin, Raphael J Bruckner, Joao A Paulo, Joe R Cannon, Lily Ting, Kurt Baltier, Greg Colby, Fana Gebreab, Melanie P Gygi, Hannah Parzen, John Szpyt, Stanley Tam, Gabriela Zarraga, Laura Pontano-Vaites, Sharan Swarup, Anne E White, Devin K Schweppe, Ramin Rad, Brian K Erickson, Robert A Obar, K G Guruharsha, Kejie Li, Spyros Artavanis-Tsakonas, Steven P Gygi, J Wade Harper
The physiology of a cell can be viewed as the product of thousands of proteins acting in concert to shape the cellular response. Coordination is achieved in part through networks of protein-protein interactions that assemble functionally related proteins into complexes, organelles, and signal transduction pathways. Understanding the architecture of the human proteome has the potential to inform cellular, structural, and evolutionary mechanisms and is critical to elucidating how genome variation contributes to disease...
May 17, 2017: Nature
https://www.readbyqxmd.com/read/28514058/in-situ-observation-of-crystallization-of-methylammonium-lead-iodide-perovskite-from-microdroplets
#9
Yahui Li, Zhenhao Zhao, Feng Lin, Xiaobing Cao, Xian Cui, Jinquan Wei
It is of great importance to investigate the crystallization of organometallic perovskite from solution for enhancing performance of perovskite solar cells. Here, this study develops a facile method for in situ observation of crystallization and growth of the methylammonium lead iodide (MAPbI3 ) perovskite from microdroplets ejected by an alternating viscous and inertial force jetting method. It is found that there are two crystallization modes when MAPbI3 grows from the CH3 NH3 I (MAI)/PbI2 /N,N-dimethylformamide (DMF) solution: needle precursors and granular perovskites...
May 17, 2017: Small
https://www.readbyqxmd.com/read/28511664/yields-and-chondrogenic-potential-of-primary-synovial-mesenchymal-stem-cells-are-comparable-between-rheumatoid-arthritis-and-osteoarthritis-patients
#10
Yuji Kohno, Mitsuru Mizuno, Nobutake Ozeki, Hisako Katano, Keiichiro Komori, Shizuka Fujii, Koji Otabe, Masafumi Horie, Hideyuki Koga, Kunikazu Tsuji, Mikio Matsumoto, Haruka Kaneko, Yuji Takazawa, Takeshi Muneta, Ichiro Sekiya
BACKGROUND: Mesenchymal stem cells derived from the synovial membrane (synovial MSCs) are a candidate cell source for regenerative medicine of cartilage and menisci due to their high chondrogenic ability. Regenerative medicine can be expected for RA patients with the inflammation well-controlled as well as OA patients and transplantation of synovial MSCs would also be a possible therapeutic treatment. Some properties of synovial MSCs vary dependent on the diseases patients have, and whether or not the pathological condition of RA affects the chondrogenesis of synovial MSCs remains controversial...
May 16, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28506845/ex-vivo-mesenchymal-precursor-cell-expanded-cord-blood-transplantation-following-reduced-intensity-conditioning-regimens-improves-time-to-neutrophil-recovery
#11
Rohtesh S Mehta, Rima M Saliba, Kai Cao, Indreshpal Kaur, Katy Rezvani, Julianne Chen, Amanda Olson, Simrit Parmar, Nina Shah, David Marin, Amin Alousi, Chitra Hosing, Uday Popat, Partow Kebriaei, Richard Champlin, Marcos de Lima, Donna Skerrett, Elizabeth Burke, Elizabeth J Shpall, Betul Oran
We previously showed the safety of using cord blood (CB) expanded ex vivo in cocultures with allogeneic mesenchymal precursor cells (MPC) after myeloablative conditioning with faster recovery of neutrophils and platelets compared with historical controls. Herein, we report the transplant outcomes of 27 patients with hematologic cancers who received one CB unit ex vivo expanded with MPCs in addition to an unmanipulated CB (MPC group) after reduced intensity conditioning (RIC). The results in this group were compared with 51 historical controls who received two unmanipulated CB units (control group)...
May 12, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28505449/interfacial-water-arrangement-in-the-ice-bound-state-of-an-antifreeze-protein-a-molecular-dynamics-simulation-study
#12
Uday Sankar Midya, Sanjoy Bandyopadhyay
Molecular dynamics (MD) simulations have been carried out to study the heterogeneous ice nucleation on modeled peptide surfaces. Simulations show that large peptide surfaces made by TxT (threonine-x-threonine) motifs with the arrangements of threonine (Thr) residues identical to the periodic arrangements of waters on either the basal or prism plane of ice are capable of ice nucleation. Nucleated ice plane is the (0001) basal plane of hexagonal ice (Ih) or (111) plane of cubic ice (Ic). However, due to predefined simulation cell dimensions, the ice growth is only observed on the surface where the TxT motifs are arranged like the water arrangement on the basal plane of ice Ih...
May 15, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28503924/complete-prevention-of-dendrite-formation-in-zn-metal-anodes-by-means-of-pulsed-charging-protocols
#13
Grecia Garcia, Edgar Ventosa, Wolfgang Schuhmann
Zn metal as anode in rechargeable batteries such as Zn/air or Zn/Ni batteries suffers from poor cyclability. The formation of Zn dendrites upon cycling is the key limiting step. We report a systematic study of the influence of pulsed electroplating protocols on the formation of Zn dendrites and in turn on strategies to completely prevent Zn dendrite formation. Due to the large number of variables in electroplating protocols, a scanning droplet cell technique was adapted as high-throughput methodology in which a descriptor of the surface roughness can be in-situ derived by means of electrochemical impedance spectroscopy...
May 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28501628/evolutionary-expansion-and-structural-functionalism-of-the-ancient-family-of-profilin-proteins
#14
Dhananjay K Pandey, Bhupendra Chaudhary
Structure and functional similarities of a recent protein's orthologs with its ancient counterpart are largely determined by the configuration of evolutionary preservation of amino acids. The emergence of genome sequencing databases allowed dissecting the evolutionarily important gene families at a comprehensive and genome-wide scale. The profilin multi-gene family is an ancient, universal, and functionally diverged across kingdoms, which regulates various aspects of cellular development in both prokarya and eukarya, especially cell-wall maintenance through actin sequestering, nucleation and cytokinesis...
May 10, 2017: Gene
https://www.readbyqxmd.com/read/28498367/initiation-and-execution-mechanisms-of-necroptosis-an-overview
#15
REVIEW
Sasker Grootjans, Tom Vanden Berghe, Peter Vandenabeele
Necroptosis is a form of regulated cell death, which is induced by ligand binding to TNF family death domain receptors, pattern recognizing receptors and virus sensors. The common feature of these receptor systems is the implication of proteins, which contain a receptor interaction protein kinase (RIPK) homology interaction motif (RHIM) mediating recruitment and activation of receptor-interacting protein kinase 3 (RIPK3), which ultimately activates the necroptosis executioner mixed lineage kinase domain-like (MLKL)...
May 12, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28494946/tropomodulins-and-leiomodins-actin-pointed-end-caps-and-nucleators-in-muscles
#16
REVIEW
Velia M Fowler, Roberto Dominguez
Cytoskeletal structures characterized by actin filaments with uniform lengths, including the thin filaments of striated muscles and the spectrin-based membrane skeleton, use barbed and pointed-end capping proteins to control subunit addition/dissociation at filament ends. While several proteins cap the barbed end, tropomodulins (Tmods), a family of four closely related isoforms in vertebrates, are the only proteins known to specifically cap the pointed end. Tmods are ∼350 amino acids in length, and comprise alternating tropomyosin- and actin-binding sites (TMBS1, ABS1, TMBS2, and ABS2)...
May 9, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28492281/c-elegans-chromosomes-connect-to-centrosomes-by-anchoring-into-the-spindle-network
#17
Stefanie Redemann, Johannes Baumgart, Norbert Lindow, Michael Shelley, Ehssan Nazockdast, Andrea Kratz, Steffen Prohaska, Jan Brugués, Sebastian Fürthauer, Thomas Müller-Reichert
The mitotic spindle ensures the faithful segregation of chromosomes. Here we combine the first large-scale serial electron tomography of whole mitotic spindles in early C. elegans embryos with live-cell imaging to reconstruct all microtubules in 3D and identify their plus- and minus-ends. We classify them as kinetochore (KMTs), spindle (SMTs) or astral microtubules (AMTs) according to their positions, and quantify distinct properties of each class. While our light microscopy and mutant studies show that microtubules are nucleated from the centrosomes, we find only a few KMTs directly connected to the centrosomes...
May 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/28485945/direct-observation-of-interactions-between-nanoparticles-and-nanoparticle-self-assembly-in-solution
#18
Shu Fen Tan, See Wee Chee, Guanhua Lin, Utkur Mirsaidov
Hierarchically organized nanoparticles (NPs) possess unique properties and are relevant to various technological applications. An important "bottom-up" strategy for building such hierarchical nanostructures is to guide the individual NPs into ordered nanoarchitectures using intermolecular interactions and external forces. However, our current understanding of the nanoscale interactions that govern such self-assembly processes usually relies on post-synthesis/assembly or indirect characterization. Theoretical models that can derive these interactions are presently constrained to systems with only a few particles or on short time scales...
May 9, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28485440/electron-tomography-analysis-of-3d-interfacial-nanostructures-appearing-in-annealed-si-rich-sic-films
#19
Ling Xie, Karol Jarolimek, Vancho Kocevski, Jan Rusz, Miro Zeman, René A C M M van Swaaij, Klaus Leifer
The optical and electrical properties of Si rich SiC (SRSC) solar cell absorber layers will strongly depend on interfacial layers between the Si and the SiC matrix and in this work, we analyze hitherto undiscovered interfacial layers. The SRSC thin films were deposited using a plasma-enhanced chemical vapor deposition (PECVD) technique and annealed in a nitrogen environment at 1100 °C. The thermal treatment leads to metastable SRSC films spinodally decomposed into a Si-SiC nanocomposite. After the thermal treatment, the coexistence of crystalline Si and SiC nanostructures was analysed by high resolution transmission electron microscopy (HRTEM) and electron diffraction...
May 9, 2017: Nanoscale
https://www.readbyqxmd.com/read/28483134/a-woman-in-her-30s-with-a-history-of-cervical-cancer-presents-with-shortness-of%C3%A2-breath-and-pleuritic-chest-pain
#20
Jing Gennie Wang, Patrick Gerard Cox
A woman in her 30s presented to the ED with a 3-month history of shortness of breath on exertion, dry cough, and pleuritic chest pain. A month ago, the patient was seen at an internal medicine clinic and was found to have a right pleural effusion. A thoracentesis revealed straw-colored fluid, a total nucleated cell count of 1,260 × 10(6)/L, and a differential with neutrophils of 0.15, lymphocytes of 0.55, macrophages/monocytes of 0.19, and eosinophils of 0.10. Fluid cytology and culture were negative. The patient was presumed to have a parapneumonic effusion and treated empirically with antibiotics...
May 2017: Chest
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