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https://www.readbyqxmd.com/read/29149404/the-translational-controlled-tumour-protein-tctp-biological-functions-and-regulation
#1
Ulrich-Axel Bommer
The Translational Controlled Tumour Protein TCTP (gene symbol TPT1, also called P21, P23, Q23, fortilin or histamine-releasing factor, HRF) is a highly conserved protein present in essentially all eukaryotic organisms and involved in many fundamental cell biological and disease processes. It was first discovered about 35 years ago, and it took an extended period of time for its multiple functions to be revealed, and even today we do not yet fully understand all the details. Having witnessed most of this history, in this chapter, I give a brief overview and review the current knowledge on the structure, biological functions, disease involvements and cellular regulation of this protein...
2017: Results and Problems in Cell Differentiation
https://www.readbyqxmd.com/read/29148092/an-inductively-coupled-ultra-thin-flexible-and-passive-rf-resonator-for-mri-marking-and-guiding-purposes-clinical-feasibility
#2
Akbar Alipour, Sayim Gokyar, Oktay Algin, Ergin Atalar, Hilmi Volkan Demir
PURPOSE: The purpose of this study is to develop a wireless, flexible, ultra-thin, and passive radiofrequency-based MRI resonant fiducial marker, and to validate its feasibility in a phantom model and several body regions. METHODS: Standard microfabrication processing was used to fabricate the resonant marker. The proposed marker consists of two metal traces in the shape of a square with an edge length of 8 mm, with upper and lower traces connected to each other by a metalized via...
November 16, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29147851/bijective-codon-transformations-show-genetic-code-symmetries-centered-on-cytosine-s-coding-properties
#3
Hervé Seligmann
Homology of some RNAs with template DNA requires systematic exchanges between nucleotides. Such exchanges produce 'swinger' RNA along 23 bijective transformations (nine symmetric, X ↔ Y; and 14 asymmetric, X → Y → Z → X, for example A ↔ C and A → C → G → A, respectively). Here, analyses compare amino acids coded by swinger-transformed codons to those coded by untransformed codons, defining coding invariance after transformations. Swinger transformations cluster according to coding invariance in four groups characterized by transformations into cytosine (C = C, T → C, A → C, and G → C)...
November 16, 2017: Theory in Biosciences, Theorie in Den Biowissenschaften
https://www.readbyqxmd.com/read/29146924/interpretation-of-dynamic-tensile-behavior-by-austenite-stability-in-ferrite-austenite-duplex-lightweight-steels
#4
Jaeyeong Park, Min Cheol Jo, Hyeok Jae Jeong, Seok Su Sohn, Jai-Hyun Kwak, Hyoung Seop Kim, Sunghak Lee
Phenomena occurring in duplex lightweight steels under dynamic loading are hardly investigated, although its understanding is essentially needed in applications of automotive steels. In this study, quasi-static and dynamic tensile properties of duplex lightweight steels were investigated by focusing on how TRIP and TWIP mechanisms were varied under the quasi-static and dynamic loading conditions. As the annealing temperature increased, the grain size and volume fraction of austenite increased, thereby gradually decreasing austenite stability...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29146549/risk-assessment-of-infected-children-with-pseudomonas-aeruginosa-pneumonia-by-combining-host-and-pathogen-predictors
#5
Jiayi Chen, Yuhang Chen, Pengwei Hu, Tao Zhou, Xin Xu, Xiaofang Pei
The current criteria of pneumonia severity, which mainly depend on clinical manifestations and laboratory findings from blood routine tests and X-ray examination, are still of great significance in preliminary diagnosis. However, the utility of traditional severe pneumonia indexes (SPI) without considering high virulence and multidrug resistance of Pseudomonas aeruginosa has limitations. Thus, it is of great value to make a risk assessment, which can serve as a complementary option for incomplete clinical diagnosis...
November 13, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29143987/effect-of-body-temperature-on-the-pharmacokinetics-of-a-triarylmethyl-type-paramagnetic-contrast-agent-used-in-epr-oximetry
#6
Ken-Ichiro Matsumoto, Fuminori Hyodo, James B Mitchell, Murali C Krishna
PURPOSE: Pharmacokinetics of the tri[8-carboxy-2,2,6,6-tetrakis(2-hydroxymethyl)benzo[1,2-d:4,5-d']bis(1,3)dithio-4-yl]methyl radical (Oxo63) after a single bolus and/or continuous intravenous infusion was investigated in tumor-bearing C3H mice with or without body temperature control while under anesthesia. METHOD: The in vivo time course of Oxo63 in blood was measured using X-band electron paramagnetic resonance spectroscopy. Distribution of Oxo63 in normal muscle and tumor tissues was obtained using a surface coil resonator and a 700-MHz electron paramagnetic resonance spectrometer...
November 16, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29143024/an-analysis-of-the-explosion-limits-of-hydrogen-oxygen-mixtures-with-nonlinear-chain-reactions
#7
Wenkai Liang, Chung K Law
The ignition boundary of hydrogen/oxygen mixtures is a Z-shaped curve in the pressure-temperature space, demonstrating the existence of three explosion limits. In this study, a general analysis governing all the three explosion limits in an isothermal environment is performed by considering both linear chain reactions (reactant-radical reactions) and nonlinear chain reactions (radical-radical reactions), in addition to the zeroth-order reactant-reactant reactions. For the nonlinear reactions, it is further shown that the linear-nonlinear coupling has the major influence, while the effect of nonlinear-nonlinear coupling is negligible...
November 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29138934/habitat-quality-affects-stress-responses-and-survival-in-a-bird-wintering-under-extremely-low-ambient-temperatures
#8
Dina Cīrule, Tatjana Krama, Ronalds Krams, Didzis Elferts, Ants Kaasik, Markus J Rantala, Pranas Mierauskas, Severi Luoto, Indrikis A Krams
Animals normally respond to stressful environmental stimuli by releasing glucocorticoid hormones. We investigated whether baseline corticosterone (CORT), handling-induced corticosterone concentration(s), and body condition indices of members of willow tit (Poecile montanus) groups differed while wintering in old growth forests and managed young forests in mild weather conditions and during cold spells. Willow tits spend the winter season in non-kin groups in which dominant individuals typically claim their priority to access resources, while subordinate individuals may experience greater levels of stress and higher mortality, especially during cold spells...
November 14, 2017: Die Naturwissenschaften
https://www.readbyqxmd.com/read/29137972/circulating-tumoral-dna-preanalytical-validation-and-quality-control-in-a-diagnostic-laboratory
#9
Sergey Nikolaev, Laure Lemmens, Thibaud Koessler, Jean-Louis Blouin, Thierry Nouspikel
We present the results of our technical validation process in establishing the analysis of circulating tumor DNA (ctDNA) as a diagnostic tool. Like most cells in our body, tumor cells shed DNA in the blood flow. Analysis of ctDNA mutational content can provide invaluable information on the genetic makeup of a tumor, and assist oncologists in deciding on therapy, or in following residual disease. However, low absolute amounts of circulating DNA and low tumor fraction constitute formidable analytical challenges...
November 11, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/29131171/application-of-spatially-modulated-near-infrared-structured-light-to-study-changes-in-optical-properties-of-mouse-brain-tissue-during-heatstress
#10
Oren Shaul, Michal Fanrazi-Kahana, Omri Meitav, Gad A Pinhasi, David Abookasis
Heat stress (HS) is a medical emergency defined by abnormally elevated body temperature that causes biochemical, physiological, and hematological changes. The goal of the present research was to detect variations in optical properties (absorption, reduced scattering, and refractive index coefficients) of mouse brain tissue during HS by using near-infrared (NIR) spatial light modulation. NIR spatial patterns with different spatial phases were used to differentiate the effects of tissue scattering from those of absorption...
November 10, 2017: Applied Optics
https://www.readbyqxmd.com/read/29128213/the-effects-of-feeding-a-partial-mixed-ration-plus-a-top-dress-before-feeding-on-milk-production-and-the-daily-rhythm-of-feed-intake-and-plasma-hormones-and-metabolites-in-dairy-cows
#11
M Niu, K J Harvatine
Total mixed rations (TMR) are commonly fed to dairy cows with a goal of reducing ruminal acidosis, but the daily pattern of feed intake has major implication for rumen fermentation and postabsorptive physiology. Generally there is low feed intake during the overnight period and high intake after feeding and during the afternoon. The objective of this study was to determine if feeding a partial mixed ration (PMR) plus a high starch top-dress before feeding of the PMR would improve production and modify key daily rhythms...
November 8, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29127003/recombinant-alpha-fetoprotein-receptor-binding-domain-co-expression-with-polyglutamate-tags-facilitates-in-vivo-folding-in-e-coli
#12
Murad Mollaev, Neonila Gorokhovets, Elena Nikolskaya, Maria Faustova, Arthur Zabolotsky, Maria Sokol, Oksana Tereshenko, Olga Zhunina, Vitaliy Shvets, Evgeniy Severin, Nikita Yabbarov
A wide range of methods are known to increase the prokaryotic intracellular recombinant proteins solubility, for instance, growth at low temperature, supplementation of culture media with "chemical chaperones" (proline, glycine-betaine, and trehalose), co-expression with chaperones or highly soluble fusion partners. As an alternative, we have introduced the polyglutamate tag, which, as it has been shown, increased the protein solubility and facilitated folding. In this study we evaluated the minimal quantity of high density negatively charged EEEEVE amino acid repeats (pGlu) necessary to switch the recombinant receptor-binding domain of human alpha-fetoprotein (rbdAFP) expression almost entirely from the inclusion bodies to the soluble cytoplasmic fraction in E...
November 7, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/29123542/effects-of-diet-and-genetics-on-growth-performance-of-pigs-in-response-to-repeated-exposure-to-heat-stress
#13
Wendy M Rauw, E Johana Mayorga, Soi Meng Lei, Jack C M Dekkers, John F Patience, Nicholas K Gabler, Steven M Lonergan, Lance H Baumgard
Heat stress (HS) is one of the costliest issues in the U.S. pork industry. Aims of the present study were to determine the consequences of repeated exposure to HS on growth performance, and the effects of a high fiber diet, the genetic potential for high lean tissue accretion, and the genetic potential for residual feed intake (RFI) on resilience to HS. Barrows (n = 97) from three genetic lines (commercial, high RFI, low RFI) where subjected three times to a 4-day HS treatment (HS1, HS2, and HS3) which was preceded by a 9-day neutral (TN) adaptation period (TN1) and alternated by 7-day periods of neutral temperatures (TN2, TN3, and TN4)...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/29113989/cold-hearted-bats-uncoupling-of-heart-rate-and-metabolism-during-torpor-at-subzero-temperatures
#14
Shannon E Currie, Clare Stawski, Fritz Geiser
Many hibernating animals thermoregulate during torpor and defend their body temperature (Tb) below 10°C by an increase in metabolic rate. Above a critical temperature (Tcrit) animals usually thermoconform. We investigated the physiological responses above and below Tcrit for a small tree dwelling bat (Chalinolobus gouldii, ∼14 g) that is often exposed to subzero temperatures during winter. Through simultaneous measurement of heart rate (HR) and oxygen consumption (V̇O2) we show that the relationship between oxygen transport and cardiac function is substantially altered in thermoregulating torpid bats between 1 and -2°C, compared with thermoconforming torpid bats at mild ambient temperatures (Ta 5-20°C)...
November 7, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29113988/seasonal-variation-in-the-thermal-responses-to-changing-environmental-temperature-in-the-world-s-northernmost-landbird
#15
Andreas Nord, Lars P Folkow
Arctic homeotherms counter challenges at high latitudes using a combination of seasonal adjustments in pelage/plumage, fat deposition, and intricate thermoregulatory adaptations. However, there are still gaps in our understanding of their thermal responses to cold, particularly in Arctic birds. Here, we have studied the potential use of local heterothermy (i.e., tissue cooling that can contribute to significantly lower heat loss rate) in Svalbard ptarmigan (Lagopus muta hyperborea) - the world's northernmost landbird...
November 7, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29112626/effects-of-ad-libitum-low-carbohydrate-high-fat-dieting-in-middle-age-male-runners
#16
Alexander J Heatherly, Lauren G Killen, Ashton F Smith, Hunter S Waldman, Angela Hollingsworth, Christie L Seltmann, Eric K O'Neal
PURPOSE: This study examined the effects of a 3-week ad libitum high fat (~70% of calories), low carbohydrate (<50 g/day) diet (LCHF) on markers of endurance performance in middle-aged, recreationally competitive male runners. METHODS: All subjects (n = 8) following their normal HC diet had anthropometric measures assessed and completed 5, 10-min running bouts at multiple individual race paces in the heat while physiological, metabolic variables and perceptual responses were recorded...
November 6, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29112168/low-temperature-crystal-structures-of-the-hard-core-square-shoulder-model
#17
Alexander Gabriëlse, Hartmut Löwen, Frank Smallenburg
In many cases, the stability of complex structures in colloidal systems is enhanced by a competition between different length scales. Inspired by recent experiments on nanoparticles coated with polymers, we use Monte Carlo simulations to explore the types of crystal structures that can form in a simple hard-core square shoulder model that explicitly incorporates two favored distances between the particles. To this end, we combine Monte Carlo-based crystal structure finding algorithms with free energies obtained using a mean-field cell theory approach, and draw phase diagrams for two different values of the square shoulder width as a function of the density and temperature...
November 7, 2017: Materials
https://www.readbyqxmd.com/read/29108562/support-for-the-thermal-coadaptation-hypothesis-from-the-growth-rates-of-sceloporus-jarrovii-lizards
#18
L D Patterson, C-A Darveau, G Blouin-Demers
The thermal coadaptation hypothesis posits that ectotherms thermoregulate behaviorally to maintain body temperatures (Tb) that maximize performance, such as net energy gain. Huey's (1982) energetics model describes how food availability and Tb interact to affect net energy gain. We tested the thermal coadaptation hypothesis and Huey's energetics model with growth rates of juvenile Yarrow's spiny lizards (Sceloporus jarrovii). We compared the preferred (selected) Tb range (Tsel) of lizards in high and low energy states to their optimal temperature (To) for growth over nine weeks, and determined whether the To for growth depended on food availability...
December 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/29108557/seasonal-energetics-and-torpor-use-in-north-american-flying-squirrels
#19
Megan N Olson, Jeff Bowman, Gary Burness
Seasonal cold temperatures require mammals to use morphological, behavioural, or physiological traits to survive periods of extreme cold and food shortage. Torpor is a physiological state that minimizes energy requirements by decreasing resting metabolic rate (MR) and body temperature (Tb). Many rodent species are capable of torpor, however, evidence in northern and southern flying squirrels (Glaucomys sabrinus and Glaucomys volans, respectively) has remained anecdotal. We experimentally attempted to induce torpor in wild-caught flying squirrels by lowering ambient temperature (Ta) and measuring MR using open-flow respirometry...
December 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/29108554/oxidative-stress-and-antioxidant-defense-responses-of-etroplus-suratensis-to-acute-temperature-fluctuations
#20
Susan Joy, Aneesa Painadath Alikunju, Jisha Jose, Hari Sankar Haridasanpillai Sudha, Prabhakaran Meethal Parambath, Sajeevan Thavarool Puthiyedathu, Babu Philip
Fishes are always exposed to various environmental stresses and the chances of succumbing to such stresses are of great physiological concern. Any change in temperature from the ambient condition can induce various metabolic and physiological changes in the body. The present study evaluates the effects of temperature induced stress on the antioxidant profile of Etroplus suratensis such as superoxide dismutase, catalase, glutathione peroxidase and lipid peroxidation. Fishes of same size were kept in a thermostatized bath at three different temperature regimes viz 16°C, 27°C (ambient temperature) and 38°C for 72h...
December 2017: Journal of Thermal Biology
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