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https://www.readbyqxmd.com/read/28110518/low-rates-of-predominant-breastfeeding-in-hospital-after-gestational-diabetes-particularly-among-indigenous-women-in-australia
#1
Catherine R Chamberlain, Alyce N Wilson, Lisa H Amir, Kerin O'Dea, Sandra Campbell, Dympna Leonard, Rebecca Ritte, Mary Mulcahy, Sandra Eades, Rory Wolfe
OBJECTIVES: To investigate rates of 'any' and 'predominant' breastfeeding in hospital among Indigenous and non-Indigenous women with and without gestational diabetes mellitus (GDM). METHODS: A retrospective study of singleton infants born from July 2007 to December 2010 at Cairns Hospital, Australia, following GDM pregnancy, using linked hospital and birth data (n=617 infants), with a subsample of medical record reviews (n=365 infants). Aggregate data were used to compare to breastfeeding rates among infants born following non-GDM pregnancy (n=7,894 infants)...
January 22, 2017: Australian and New Zealand Journal of Public Health
https://www.readbyqxmd.com/read/28110496/heterogenic-response-of-prokaryotes-toward-silver-nanoparticles-and-ions-is-facilitated-by-phenotypes-and-attachment-of-silver-aggregates-to-cell-surfaces
#2
Yuting Guo, Hans J Stärk, Gerd Hause, Matthias Schmidt, Hauke Harms, Lukas Y Wick, Susann Müller
Tons of anthropogenic silver nanoparticles (AgNPs) are assumed to be released into the environment due to their use in many consumer products. AgNPs are known to be toxic toward microorganisms and thus may harm their specific functions in ecosystems. Here we explore the impact of AgNPs on functioning of single cells in microbial populations at doses typically found in anthropogenic environments. The response of single cells to AgNPs was analyzed by flow cytometry and using the fluorescent dyes propidium iodide and DiBAC4 (3) as markers for cell membrane disintegration and depolarization, respectively...
January 22, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/28110483/explosive-blast-loading-on-human-3d-aggregate-minibrains
#3
Nicole E Zander, Thuvan Piehler, Helena Hogberg, David Pamies
The effects of primary explosive blast on brain tissue still remain mostly unknown. There are few in vitro models that use real explosives to probe the mechanisms of injury at the cellular level. In this work, 3D aggregates of human brain cells or brain microphysiological system were exposed to military explosives at two different pressures (50 and 100 psi). Results indicate that membrane damage and oxidative stress increased with blast pressure, but cell death remained minimal.
January 21, 2017: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/28110229/aerobic-granular-sludge-inoculated-microbial-fuel-cells-for-enhanced-epoxy-reactive-diluent-wastewater-treatment
#4
Kai Cheng, Jingping Hu, Huijie Hou, Bingchuan Liu, Qin Chen, Keliang Pan, Wenhong Pu, Jiakuan Yang, Xu Wu, Changzhu Yang
Microbial consortiums aggregated on the anode surface of microbial fuel cells (MFCs) are critical factors for electricity generation as well as biodegradation efficiencies of organic compounds. Here in this study, aerobic granular sludge (AGS) was assembled on the surface of the MFC anode to form an AGS-MFC system with superior performance on epoxy reactive diluent (ERD) wastewater treatment. AGS-MFCs successfully shortened the startup time from 13d to 7d compared to the ones inoculated with domestic wastewater...
January 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28110188/p53-dependent-apoptosis-and-cell-cycle-delay-induced-by-heteroleptic-complexes-in-human-cervical-cancer-cells
#5
Gunjan Sharma, Nishant Kumar Rana, Priya Singh, Pradeep Dubey, Daya Shankar Pandey, Biplob Koch
We previously reported synthesis of novel arene ruthenium (Ru) complexes and evaluated their antitumor activity in murine lymphoma (DL) cells. In this present study we further investigated the mechanism of action of two ruthenium complexes [complex 1 (η6-arene)RuCl(2-pcdpm)] and complex 2 (η6-arene)RuCl(4-mtdpm)] in cervical cancer cell line (HeLa). Our studies demonstrate that anticancer property of these two complexes was due to induction of apoptosis through p53 mediated pathway as well as arrest of cells in G2/M phase of cell cycle...
January 19, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28110073/sphingosine-1-phosphate-improves-endothelialization-with-reduction-of-thrombosis-in-recellularized-human-umbilical-vein-graft-by-inhibiting-syndecan-1-shedding-in-vitro
#6
Kai Hsia, Ming-Jie Yang, Wei-Min Chen, Chao-Ling Yao, Chih-Hsun Lin, Che-Chuan Loong, Yi-Long Huang, Ya-Ting Lin, Arthur D Lander, Hsinyu Lee, Jen-Her Lu
: Sphingosine-1-phosphate (S1P) has been known to promote endothelial cell (EC) proliferation and protect Syndecan-1 (SDC1) from shedding, thereby maintaining this antithrombotic signal. In the present study, we investigated the effect of S1P in the construction of a functional tissue-engineered blood vessel by using human endothelial cells and decellularized human umbilical vein (DHUV) scaffolds. Both human umbilical vein endothelial cells (HUVEC) and human cord blood derived endothelial progenitor cells (EPC) were seeded onto the scaffold with or without the S1P treatment...
January 18, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28110039/heat-induced-solubilization-of-curcumin-in-kinetically-stable-pluronic-p123-micelles-and-vesicles-an-exploit-of-slow-dynamics-of-the-micellar-restructuring-processes-in-the-aqueous-pluronic-system
#7
R Ganguly, A Kunwar, B Dutta, S Kumar, K C Barick, A Ballal, V K Aswal, P A Hassan
Wide therapeutic potential combined with low cost and negligible toxicity makes curcumin one of the most sought after drugs in recent times. Its poor aqueous solubility and low bioavailability are often overcome by using micelles and vesicles as its carriers. The substances that are commonly used for this purpose are a class of nonionic surfactants called pluronics. Solubilization of curcumin in aqueous systems of these surfactants is carried out by thin film hydration method presumably because slow dynamics of micellar restructuring processes in them creates hindrance for direct solubilization...
January 17, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28110014/nanosilver-as-a-disinfectant-in-dental-unit-waterlines-assessment-of-the-physicochemical-transformations-of-the-agnps
#8
Alireza Gitipour, Souhail R Al-Abed, Stephen W Thiel, Kirk G Scheckel, Thabet Tolaymat
Dental unit water lines (DUWL) are susceptible to biofilm development and bacterial growth leading to water contamination, causing health and ecological effects. This study monitors the interactions between a commonly used nanosilver disinfectant (ASAP-AGX-32, an antimicrobial cleaner for dental units, 0.0032% Ag) and biofilm development in DUWL. To simulate the disinfection scenario, an in-house DUWL model was assembled and biofilm accumulation was allowed. Subsequent to biofilm development, the disinfection process was performed according to the manufacturer's instructions...
January 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28109886/truncated-prion-protein-prp226-a-structural-view-on-its-role-in-amyloid-disease
#9
Valerija Kovač, Blaž Zupančič, Gregor Ilc, Janez Plavec, Vladka Čurin Šerbec
In the brain of patients with transmissible spongiform encephalopathies, besides PrP(Sc) aggregates, deposition of truncated PrP molecules was described. Jansen et al. reported two clinical cases with deposition of C-terminally truncated PrP, one of them ending with Tyr226. We have previously described the discovery of monoclonal antibody V5B2 that selectively recognizes this version of the prion protein, which we called PrP226*. Using monoclonal antibody V5B2 we showed that accumulation of PrP226* is characteristic for most types of human and animal TSEs...
January 18, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28109844/colorimetric-detection-of-cucumber-green-mottle-mosaic-virus-using-unmodified-gold-nanoparticles-as-colorimetric-probes
#10
Lin Wang, Zhanmin Liu, Xueying Xia, Cuiyun Yang, Junyi Huang, Sibao Wan
Cucumber green mottle mosaic virus (CGMMV)causes a severe mosaic symptom of watermelon and cucumber, and can be transmitted via infected cucumber seeds, leaves and soil. It remains a challenge to detect this virus to prevent its introduction and infection and spread in fields. For this purpose, a simple and sensitive label-free colorimetric detection method for CGMMV has been developed with unmodified gold nanoparticles (AuNPs) as colorimetric probes. The method is based on the finding that the presence of RT-PCR target products of CGMMV and species-specific probes results in color change of AuNPs from red to blue after NaCl induction...
January 18, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28109813/amyloid-like-aggregates-formation-by-blood-plasma-fibronectin
#11
Rümeyza Bascetin, Khadija Admane, Rémy Agniel, Thomas Boudou, Tristan Doussineau, Rodolphe Antoine, Olivier Gallet, Johanne Leroy-Dudal, Charlotte Vendrely
Fibronectin (FN) is a multifunctional glycoprotein of the extracellular matrix (ECM) playing critical roles in physiological and pathological cell processes like adhesion, migration, growth, and differentiation. These various functions of FN are modulated by its supramolecular state. Indeed, FN can polymerize into different types of assemblies like fibrils and aggregates. However, the mechanism of polymerization and the effects of such assemblies on cell behaviors still remain to be elucidated. Here we show that upon irreversible thermal denaturation, human blood plasma fibronectin forms high molecular weight aggregates...
January 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28109750/phytosphingosine-sphingosine-and-dihydrosphingosine-ceramides-in-model-skin-lipid-membranes-permeability-and-biophysics
#12
Barbora Školová, Andrej Kováčik, Ondřej Tesař, Lukáš Opálka, Kateřina Vávrová
Ceramides based on phytosphingosine, sphingosine and dihydrosphingosine are essential constituents of the skin lipid barrier that protects the body from excessive water loss. The roles of the individual ceramide subclasses in regulating skin permeability and the reasons for C4-hydroxylation of these sphingolipids are not completely understood. We investigated the chain length-dependent effects of dihydroceramides, sphingosine ceramides (with C4-unsaturation) and phytoceramides (with C4-hydroxyl) on the permeability, lipid organization and thermotropic behavior of model stratum corneum lipid membranes composed of ceramide/lignoceric acid/cholesterol/cholesteryl sulfate...
January 18, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28109635/impact-of-high-cholesterol-in-a-parkinson-s-disease-model-prevention-of-lysosomal-leakage-versus-stimulation-of-%C3%AE-synuclein-aggregation
#13
Ida Eriksson, Sangeeta Nath, Per Bornefall, Ana Maria Villamil Giraldo, Karin Öllinger
Parkinson's disease is characterized by accumulation of intraneuronal cytoplasmic inclusions, Lewy bodies, which mainly consist of aggregated α-synuclein. Controversies exist as to whether high blood cholesterol is a risk factor for the development of the disease and whether statin treatment could have a protective effect. Using a model system of BE(2)-M17 neuroblastoma cells treated with the neurotoxin 1-methyl-4-phenylpyridinium (MPP(+)), we found that MPP(+)-induced cell death was accompanied by cholesterol accumulation in a lysosomal-like pattern in pre-apoptotic cells...
January 16, 2017: European Journal of Cell Biology
https://www.readbyqxmd.com/read/28109332/structural-characteristics-of-%C3%AE-synuclein-oligomers
#14
N Cremades, S W Chen, C M Dobson
Oligomeric forms of amyloid aggregates have been detected in the brains and tissues of patients suffering from neurodegenerative disorders such as Parkinson's disease, and it is widely thought that such species are key pathogenic agents in the development and spreading of the disease; however, the study of these species has been proven to be extremely challenging, primarily as a result of their intrinsically transient nature and high levels of heterogeneity. Identifying the structural nature and the details of the mechanisms of formation and interconversion of individual oligomeric species, particularly those with high toxicity, is of fundamental importance not only for understanding the mechanisms of protein misfolding and amyloid aggregation but also for the identification of diagnostic and therapeutic targets...
2017: International Review of Cell and Molecular Biology
https://www.readbyqxmd.com/read/28109331/protein-aggregation-and-molecular-crowding-perspectives-from-multiscale-simulations
#15
F Musiani, A Giorgetti
Cells are extremely crowded environments, thus the use of diluted salted aqueous solutions containing a single protein is too simplistic to mimic the real situation. Macromolecular crowding might affect protein structure, folding, shape, conformational stability, binding of small molecules, enzymatic activity, interactions with cognate biomolecules, and pathological aggregation. The latter phenomenon typically leads to the formation of amyloid fibrils that are linked to several lethal neurodegenerative diseases, but that can also play a functional role in certain organisms...
2017: International Review of Cell and Molecular Biology
https://www.readbyqxmd.com/read/28109330/the-structure-of-mammalian-prions-and-their-aggregates
#16
E Vázquez-Fernández, H S Young, J R Requena, H Wille
Prion diseases, such as Creutzfeldt-Jakob disease in humans, bovine spongiform encephalopathy in cattle, chronic wasting disease in cervids (i.e., deer, elk, moose, and reindeer), and sheep scrapie, are caused by the misfolding of the cellular prion protein (PrP(C)) into a disease-causing conformer (PrP(Sc)). PrP(C) is a normal, GPI-anchored protein that is expressed on the surface of neurons and other cell types. The structure of PrP(C) is well understood, based on studies of recombinant PrP, which closely mimics the structure of native PrP(C)...
2017: International Review of Cell and Molecular Biology
https://www.readbyqxmd.com/read/28109329/what-makes-a-prion-infectious-proteins-from-animals-to-yeast
#17
K S MacLea
While philosophers in ancient times had many ideas for the cause of contagion, the modern study of infective agents began with Fracastoro's 1546 proposal that invisible "spores" spread infectious disease. However, firm categorization of the pathogens of the natural world would need to await a mature germ theory that would not arise for 300 years. In the 19th century, the earliest pathogens described were bacteria and other cellular microbes. By the close of that century, the work of Ivanovsky and Beijerinck introduced the concept of a virus, an infective particle smaller than any known cell...
2017: International Review of Cell and Molecular Biology
https://www.readbyqxmd.com/read/28109328/the-nucleation-of-protein-aggregates-from-crystals-to-amyloid-fibrils
#18
Alexander K Buell
The condensation and aggregation of individual protein molecules into dense insoluble phases is of relevance in such diverse fields as materials science, medicine, structural biology and pharmacology. A common feature of these condensation phenomena is that they usually are nucleated processes, i.e. the first piece of the condensed phase is energetically costly to create and hence forms slowly compared to its subsequent growth. Here we give a compact overview of the differences and similarities of various protein nucleation phenomena, their theoretical description in the framework of colloid and polymer science and their experimental study...
2017: International Review of Cell and Molecular Biology
https://www.readbyqxmd.com/read/28109327/effects-of-intrinsic-and-extrinsic-factors-on-aggregation-of-physiologically-important-intrinsically-disordered-proteins
#19
L Breydo, J M Redington, V N Uversky
Misfolding and aggregation of proteins and peptides play an important role in a number of diseases as well as in many physiological processes. Many of the proteins that misfold and aggregate in vivo are intrinsically disordered. Protein aggregation is a complex multistep process, and aggregates can significantly differ in morphology, structure, stability, cytotoxicity, and self-propagation ability. The aggregation process is influenced by both intrinsic (e.g., mutations and expression levels) and extrinsic (e...
2017: International Review of Cell and Molecular Biology
https://www.readbyqxmd.com/read/28109326/from-the-evolution-of-protein-sequences-able-to-resist-self-assembly-to-the-prediction-of-aggregation-propensity
#20
F Bemporad, M Ramazzotti
Folding of polypeptide chains into biologically active entities is an astonishingly complex process, determined by the nature and the sequence of residues emerging from ribosomes. While it has been long believed that evolution has pressed genomes so that specific sequences could adopt unique, functional three-dimensional folds, it is now clear that complex protein machineries act as quality control system and supervise folding. Notwithstanding that, events such as erroneous folding, partial folding, or misfolding are frequent during the life of a cell or a whole organism, and they can escape controls...
2017: International Review of Cell and Molecular Biology
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