keyword
MENU ▼
Read by QxMD icon Read
search

Verify now

keyword
https://www.readbyqxmd.com/read/27903259/differential-variation-patterns-between-hubs-and-bottlenecks-in-human-protein-protein-interaction-networks
#1
Erli Pang, Yu Hao, Ying Sun, Kui Lin
BACKGROUND: The identification, description and understanding of protein-protein networks are important in cell biology and medicine, especially for the study of system biology where the focus concerns the interaction of biomolecules. Hubs and bottlenecks refer to the important proteins of a protein interaction network. Until now, very little attention has been paid to differentiate these two protein groups. RESULTS: By integrating human protein-protein interaction networks and human genome-wide variations across populations, we described the differences between hubs and bottlenecks in this study...
December 1, 2016: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/27885598/identification-of-ligand-receptor-interactions-ligand-molecular-arrays-spr-and-nmr-methodologies
#2
Christopher J Day, Lauren E Hartley-Tassell, Victoria Korolik
Despite many years of research into bacterial chemotaxis, the only well characterized system to date is that of E. coli. Even for E. coli, the direct ligand binding had been fully characterized only for aspartate and serene receptors Tar and Tsr. In 30 years since, no other direct receptor-ligand interaction had been described for bacteria, until the characterization of the C. jejuni aspartate and multiligand receptors (Hartley-Tassell et al. Mol Microbiol 75:710-730, 2010). While signal transduction components of many sensory pathways have now been characterized, ligand-receptor interactions remain elusive due to paucity of high-throughput screening methods...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27871375/a-novel-simple-screening-method-for-investigating-the-properties-of-lignin-oxidative-activity
#3
Fabio Tonin, Elisa Vignali, Loredano Pollegioni, Paola D'Arrigo, Elena Rosini
Enzymatic lignin degradation represents a key challenge for integrated biorefineries. Notwithstanding the rich content in aromatic compounds, lignin's complex structure has hampered identification of an effective and cost-efficient enzymatic procedure to transform it into less complex product families. Advancements in enzymatically modifying or degrading lignin require a simple and reliable analytical method to quickly screen diverse lignin samples by employing different enzymes and conditions. Here, we report on a novel, rapid, and economic colorimetric assay for lignin oxidation based on the reaction of 2,4-dinitrophenylhydrazine with the carbonyl groups generated by enzymatic oxidation...
January 2017: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/27814640/dna-polymerases-in-the-mitochondria-a-critical-review-of-the-evidence
#4
Rachel Krasich, William C Copeland
Since 1970, the DNA polymerase gamma (PolG) has been known to be the DNA polymerase responsible for replication and repair of mitochondrial DNA, and until recently it was generally accepted that this was the only polymerase present in mitochondria. However, recent data has challenged that opinion, as several polymerases are now proposed to have activity in mitochondria. To date, their exact role of these other DNA polymerases is unclear and the amount of evidence supporting their role in mitochondria varies greatly...
January 1, 2017: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/27803746/neemp-software-for-validation-accurate-calculation-and-fast-parameterization-of-eem-charges
#5
Tomáš Raček, Jana Pazúriková, Radka Svobodová Vařeková, Stanislav Geidl, Aleš Křenek, Francesco Luca Falginella, Vladimír Horský, Václav Hejret, Jaroslav Koča
BACKGROUND: The concept of partial atomic charges was first applied in physical and organic chemistry and was later also adopted in computational chemistry, bioinformatics and chemoinformatics. The electronegativity equalization method (EEM) is the most frequently used approach for calculating partial atomic charges. EEM is fast and its accuracy is comparable to the quantum mechanical charge calculation method for which it was parameterized. Several EEM parameter sets for various types of molecules and QM charge calculation approaches have been published and new ones are still needed and produced...
2016: Journal of Cheminformatics
https://www.readbyqxmd.com/read/27799429/cdsxse1-x-quantum-dots-as-colouring-agents-of-art-nouveau-and-contemporary-stained-glass-a-combined-transmission-electron-microscopy-and-raman-study
#6
C Fornacelli, Ph Sciau, Ph Colomban
The use of cadmium chalchogenide nanoprecipitates to obtain brightly coloured glasses enormously expanded by the beginning of the twentieth century, when the production of cadmium-based pigments was already well established. Six historical stained glass pieces produced between the late 1920s and modern days have been investigated in order to delineate the average size and the elemental composition of the nanocrystals. As non-invasive conditions are now mandatory when considering objects belonging to cultural heritage, Raman spectroscopy is used to measure the (average) elemental composition of the nanoparticles...
December 13, 2016: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/27797228/evaluation-of-mt1xt20-single-quasi-monomorphic-mononucleotide-marker-for-characterizing-microsatellite-instability-in-persian-lynch-syndrome-patients
#7
Najmeh Farahani, Parvaneh Nikpou, Mohammad Hassan Emami, Morteza Hashemzadeh, Mehrdad Zeinalian, Seyed Shervin Shariatpanahi, Rasoul Salehi
BACKGROUND: Colorectal malignancies with high microsatellite instability (MSI-H), either hereditary (Lynch syndrome) or sporadic, demonstrate better prognosis and altered response to 5FU chemotherapy. It is now recommended to perform MSI testing for all new cases of colorectal cancer regardless of being categorized as hereditary or sporadic. For MSI detection, immunohistochemistry or PCR-based protocols using a cohort of various sets of STR markers are recommended. Here we aimed to evaluate a simplified protocol using just a single STR marker, MT1XT20 mononucleotide repeat, for detection of MSI in Lynch syndrome patients...
2016: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/27788059/a-low-cost-method-of-skin-swabbing-for-the-collection-of-dna-samples-from-small-laboratory-fish
#8
Carl Breacker, Iain Barber, William H J Norton, Jonathan R McDearmid, Ceinwen A Tilley
Fin clipping of live fish under anesthesia is widely used to collect samples for DNA extraction. An alternative, potentially less invasive, approach involves obtaining samples by swabbing the skin of nonanesthetized fish. However, this method has yet to be widely adopted for use in laboratory studies in the biological and biomedical sciences. Here, we compare DNA samples from zebrafish Danio rerio and three-spined sticklebacks Gasterosteus aculeatus collected via fin clipping and skin swabbing techniques, and test a range of DNA extraction methods, including commercially available kits and a lower-cost, in-house method...
October 27, 2016: Zebrafish
https://www.readbyqxmd.com/read/27787234/interaction-of-a-relativistic-dense-electron-beam-with-a-laser-wiggler-in-a-vacuum-self-field-effects-on-the-electron-orbits-and-free-electron-laser-gain
#9
E Abbasi, S Jafari, R Hedayati
Employing laser wigglers and accelerators provides the potential to dramatically cut the size and cost of X-ray light sources. Owing to recent technological developments in the production of high-brilliance electron beams and high-power laser pulses, it is now conceivable to make steps toward the practical realisation of laser-pumped X-ray free-electron lasers (FELs). In this regard, here the head-on collision of a relativistic dense electron beam with a linearly polarized laser pulse as a wiggler is studied, in which the laser wiggler can be realised using a conventional quantum laser...
November 1, 2016: Journal of Synchrotron Radiation
https://www.readbyqxmd.com/read/27784296/-inverse-signaling-of-the-transmembrane-chemokine-cxcl16-contributes-to-proliferative-and-anti-apoptotic-effects-in-cultured-human-meningioma-cells
#10
Kirsten Hattermann, Kareen Bartsch, Henrike H Gebhardt, H Maximilian Mehdorn, Michael Synowitz, Anne Dorothée Schmitt, Rolf Mentlein, Janka Held-Feindt
BACKGROUND: Chemokines and their receptors play a decisive role in tumor progression and metastasis. We recently found a new signaling mechanism in malignant glioma cells mediated by transmembrane chemokines that we termed "inverse signaling". According to this hypothesis, soluble (s)-CXCL16 binds to the surface-expressed transmembrane (tm) -CXCL16, and induces signaling and different biological effects in the stimulated cells, so that the transmembrane ligand itself acts as a receptor for its soluble counterpart...
October 27, 2016: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/27782077/maternal-chromium-restriction-leads-to-glucose-metabolism-imbalance-in-mice-offspring-through-insulin-signaling-and-wnt-signaling-pathways
#11
Qian Zhang, Xiaofang Sun, Xinhua Xiao, Jia Zheng, Ming Li, Miao Yu, Fan Ping, Zhixin Wang, Cuijuan Qi, Tong Wang, Xiaojing Wang
An adverse intrauterine environment, induced by a chromium-restricted diet, is a potential cause of metabolic disease in adult life. Up to now, the relative mechanism has not been clear. C57BL female mice were time-mated and fed either a control diet (CD), or a chromium-restricted diet (CR) throughout pregnancy and the lactation period. After weaning, some offspring continued the diet diagram (CD-CD or CR-CR), while other offspring were transferred to another diet diagram (CD-CR or CR-CD). At 32 weeks of age, glucose metabolism parameters were measured, and the liver from CR-CD group and CD-CD group was analyzed using a gene array...
October 22, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27779120/towards-clinical-application-prompt-gamma-imaging-of-passively-scattered-proton-fields-with-a-knife-edge-slit-camera
#12
M Priegnitz, S Barczyk, L Nenoff, C Golnik, I Keitz, T Werner, S Mein, J Smeets, F Vander Stappen, G Janssens, L Hotoiu, F Fiedler, D Prieels, W Enghardt, G Pausch, C Richter
Prompt γ-ray imaging with a knife-edge shaped slit camera provides the possibility of verifying proton beam range in tumor therapy. Dedicated experiments regarding the characterization of the camera system have been performed previously. Now, we aim at implementing the prototype into clinical application of monitoring patient treatments. Focused on this goal of translation into clinical operation, we systematically addressed remaining challenges and questions. We developed a robust energy calibration routine and corresponding quality assurance protocols...
November 21, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27774359/technical-report-of-successful-deployment-of-tandem-visual-tracking-during-live-laparoscopic-cholecystectomy-between-novice-and-expert-surgeon
#13
Yana Puckett, Benedicto C Baronia
With the recent advances in eye tracking technology, it is now possible to track surgeons' eye movements while engaged in a surgical task or when surgical residents practice their surgical skills. Several studies have compared eye movements of surgical experts and novices and developed techniques to assess surgical skill on the basis of eye movement utilizing simulators and live surgery. None have evaluated simultaneous visual tracking between an expert and a novice during live surgery. Here, we describe a successful simultaneous deployment of visual tracking of an expert and a novice during live laparoscopic cholecystectomy...
September 20, 2016: Curēus
https://www.readbyqxmd.com/read/27771533/high-resolution-snp-genotyping-platform-identified-recurrent-and-novel-cnvs-in-autism-multiplex-families
#14
Laila Y AlAyadhi, Jamil A Hashmi, Muhammad Iqbal, Alia M Albalawi, Mohammad I Samman, Nadra E Elamin, Shahid Bashir, Sulman Basit
Single nucleotide polymorphisms (SNPs)-based genotyping using microarray platform is now frequently used to detect copy number variants (CNVs) in the human genome. Here, we report CNVs identified using Illumina Human Omni 2.5M oligonucleotide microarrays in 11 multiplex families with autism spectrum disorder (ASD) referred to Autism Research and Treatment Center (ART) and Madinah Maternity and Children Hospital (MMCH). Of the 11 families, 22 patients with ASD (all males) and their parents, were recruited for the present study...
December 17, 2016: Neuroscience
https://www.readbyqxmd.com/read/27756476/sedimentation-field-flow-fractionation-and-optical-absorption-spectroscopy-for-a-quantitative-size-characterization-of-silver-nanoparticles
#15
Catia Contado, Roberto Argazzi, Vincenzo Amendola
Many advanced industrial and biomedical applications that use silver nanoparticles (AgNPs), require that particles are not only nano-sized, but also well dispersed, not aggregated and not agglomerated. This study presents two methods able to give rapidly sizes of monodispersed AgNPs suspensions in the dimensional range of 20-100nm. The first method, based on the application of Mie's theory, determines the particle sizes from the values of the surface plasmon resonance wavelength (SPRMAX), read from the optical absorption spectra, recorded between 190nm and 800nm...
October 13, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27755693/threshold-effect-of-habitat-loss-on-bat-richness-in-cerrado-forest-landscapes
#16
Renata L Muylaert, Richard D Stevens, Milton C Ribeiro
Understanding how animal groups respond to contemporary habitat loss and fragmentation is essential for development of strategies for species conservation. Until now, there has been no consensus about how landscape degradation affects the diversity and distribution of Neotropical bats. Some studies demonstrate population declines and species loss in impacted areas, although the magnitude and generality of these effects on bat community structure are unclear. Empirical fragmentation thresholds predict an accentuated drop in biodiversity, and species richness in particular, when less than 30% of the original amount of habitat in the landscape remains...
September 2016: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/27755613/computational-prediction-of-non-enzymatic-rna-degradation-patterns
#17
Agnieszka Rybarczyk, Paulina Jackowiak, Marek Figlerowicz, Jacek Blazewicz
Since the beginning of the 21st century, an increasing interest in the research of ribonucleic acids has been observed in response to a surprising discovery of the role that RNA molecules play in the biological systems. It was demonstrated that they do not only take part in the protein synthesis (mRNA, rRNA, tRNA) but also are involved in the regulation of gene expression. Several classes of small regulatory RNAs have been discovered (e.g. microRNA, small interfering RNA, piwiRNA). Most of them are excised from specific double-stranded RNA precursors by enzymes that belong to the RNaseIII family (Drosha, Dicer or Dicer-like proteins)...
October 19, 2016: Acta Biochimica Polonica
https://www.readbyqxmd.com/read/27754330/a-reliable-method-for-the-evaluation-of-the-anaphylactoid-reaction-caused-by-injectable-drugs
#18
Fang Wang, Zebin Weng, Cunyu Li, Guoping Peng
Adverse reactions of injectable drugs usually occur at first administration and are closely associated with the dosage and speed of injection. This phenomenon is correlated with the anaphylactoid reaction. However, up to now, study methods based on antigen detection have still not gained wide acceptance and single physiological indicators cannot be utilized to differentiate anaphylactoid reactions from allergic reactions and inflammatory reactions. In this study, a reliable method for the evaluation of anaphylactoid reactions caused by injectable drugs was established by using multiple physiological indicators...
October 12, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27751782/the-first-independent-study-on-the-complex-trial-protocol-version-of-the-p300-based-concealed-information-test-corroboration-of-previous-findings-and-highlights-on-vulnerabilities
#19
Gáspár Lukács, Béla Weiss, Vera Daniella Dalos, Tünde Kilencz, Szabina Tudja, Gábor Csifcsák
More than a dozen studies of the Complex Trial Protocol (CTP) version of the P300-based Concealed Information Test have been published since its introduction (Rosenfeld et al., 2008), and it has been fairly consistently proven to provide high accuracy and strong resistance to countermeasures (Rosenfeld et al., 2013). However, no independent authors have verified these findings until now. In the present, first independent study, we corroborate the accuracy and countermeasure-resistance of the CTP, when the probe item (critical presented information, e...
October 15, 2016: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/27751767/immunohistochemistry-of-aldosterone-synthase-leads-the-way-to-the-pathogenesis-of-primary-aldosteronism
#20
Koshiro Nishimoto, Minae Koga, Tsugio Seki, Kenji Oki, Elise P Gomez-Sanchez, Celso E Gomez-Sanchez, Mitsuhide Naruse, Tomokazu Sakaguchi, Shinya Morita, Takeo Kosaka, Mototsugu Oya, Tadashi Ogishima, Masanori Yasuda, Makoto Suematsu, Yasuaki Kabe, Masao Omura, Tetsuo Nishikawa, Kuniaki Mukai
Our group previously purified human and rat aldosterone synthase (CYP11B2 and Cyp11b2, respectively) from their adrenals and verified that it is distinct from steroid 11β-hydroxylase (CYP11B1 or Cyp11b1), the cortisol- or corticosterone-synthesizing enzyme. We now describe their distributions immunohistochemically with specific antibodies. In rats, there is layered functional zonation with the Cyp11b2-positive zona glomerulosa (ZG), Cyp11b1-positive zona fasciculata (ZF), and Cyp11b2/Cyp11b1-negative undifferentiated zone between the ZG and ZF...
October 14, 2016: Molecular and Cellular Endocrinology
keyword
keyword
39782
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"