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https://www.readbyqxmd.com/read/29155304/metabolomics-taking-snapshots-of-cellular-physiology-in-health-and-disease
#1
EDITORIAL
Joanna Kargul, Irmgard Irminger-Finger, Geoff J Laurent
No abstract text is available yet for this article.
November 15, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/29155255/the-role-of-epigenetics-in-cardiovascular-health-and-aging-a-focus-on-physical-activity-and-nutrition
#2
REVIEW
Robert G Wallace, Laura C Twomey, Marc-Antoine Custaud, Jonathan Turner, Niall Moyna, Philip M Cummins, Ronan P Murphy
The cardiovascular system is responsible for transport of blood and nutrients to tissues, and is pivotal to the physiological health and longevity. Epigenetic modification is a natural, age-associated process resulting in highly contextualised gene expression with clear implications for cell differentiation and disease onset. Biological/epigenetic age is independent of chronological age, constituting a highly reflective snapshot of an individual's overall health. Accelerated vascular aging is of major concern, effectively lowering disease threshold...
November 16, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/29153173/a-100-year-review-lactating-dairy-cattle-housing-management
#3
J M Bewley, L M Robertson, E A Eckelkamp
Since the mid-1800s, farmers have been housing livestock. What began as a part-time solution for cold winters, stormy days, or injured animals has evolved into the main or only area in which cows spend their adult lives. With this change, farmers, academic researchers, and industry innovators have shaped the farm landscape, literally. Over the last 100 years, changes have been made for productivity, health, milk quality, reproduction, animal well-being, and farm profitability. We review a snapshot of those changes and look ahead to the future of lactating dairy cattle housing...
December 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29152817/how-complex-should-models-be-comparing-correlative-and-mechanistic-range-dynamics-models
#4
Damien A Fordham, Cleo Bertelsmeier, Barry W Brook, Regan Early, Dora Neto, Stuart C Brown, Sébastien Ollier, Miguel B Araújo
Criticism has been levelled at climate-change-induced forecasts of species range shifts that do not account explicitly for complex population dynamics. The relative importance of such dynamics under climate change is, however, undetermined because direct tests comparing the performance of demographic models vs. simpler ecological niche models are still lacking owing to difficulties in evaluating forecasts using real-world data. We provide the first comparison of the skill of coupled ecological-niche-population models and ecological niche models in predicting documented shifts in the ranges of 20 British breeding bird species across a 40-year period...
November 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/29151182/electrical-cardioversion-of-patients-with-implanted-pacemaker-or-cardioverter-defibrillator-results-of-a-survey-of-german-centers-and-systematic-review-of-the-literature
#5
J Lüker, A Sultan, T Plenge, J van den Bruck, C-H Heeger, S Meyer, K Mischke, R R Tilz, D Vollmann, G Nölker, B Schäffer, S Willems, D Steven
AIMS: A relevant number of patients presenting for electrical cardioversion carry a pacemaker (PM) or ICD. Case reports suggest a potential hazard of external cardioversion/defibrillation. The incidence of shock related device complications is unknown. No guidelines or recommendations by international medical societies for a cardioversion protocol of cardiovascular implantable electronic device (CIED) patients exist. We conducted a nationwide survey to gather real-world clinical data on the current clinical approach towards these patients during electrical cardioversion and to estimate the incidence of shock-related complications...
November 18, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/29150609/atomic-resolution-snapshot-of-leishmania-ribosome-inhibition-by-the-aminoglycoside-paromomycin
#6
Moran Shalev-Benami, Yan Zhang, Haim Rozenberg, Yuko Nobe, Masato Taoka, Donna Matzov, Ella Zimmerman, Anat Bashan, Toshiaki Isobe, Charles L Jaffe, Ada Yonath, Georgios Skiniotis
Leishmania is a single-celled eukaryotic parasite afflicting millions of humans worldwide, with current therapies limited to a poor selection of drugs that mostly target elements in the parasite's cell envelope. Here we determined the atomic resolution electron cryo-microscopy (cryo-EM) structure of the Leishmania ribosome in complex with paromomycin (PAR), a highly potent compound recently approved for treatment of the fatal visceral leishmaniasis (VL). The structure reveals the mechanism by which the drug induces its deleterious effects on the parasite...
November 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/29150448/taking-a-goal-centred-dynamic-snapshot-as-a-possibility-for-local-homing-in-initially-na%C3%A3-ve-bumblebees
#7
Anne Lobecke, Roland Kern, Martin Egelhaaf
It is essential for central place foragers, such as bumblebees, to return reliably to their nest. Bumblebees, leaving their inconspicuous nest hole for the first time need to gather and learn sufficient information about their surroundings to allow them to return to their nest at the end of their trip, instead of just flying away to forage. Therefore, we assume an intrinsic learning program that manifests itself in the flight structure immediately after leaving the nest for the first time.In this study, we recorded and analysed the first outbound flight of individually marked naïve bumblebees in an indoor environment...
November 17, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29149609/snapshot-functions-of-endoplasmic-reticulum-membrane-contact-sites
#8
Raquel Salvador-Gallego, Melissa J Hoyer, Gia K Voeltz
The endoplasmic reticulum (ER) consists of the nuclear envelope and a reticulated interconnected network of tubules and sheets. ER sheets are studded with ribosomes and provide the entryway for proteins into the secretory pathway. ER tubules move dynamically on microtubules and form membrane contact sites with other organelles, where membranes are tethered, but not fused. This Snapshot reviews key biological processes that take place at ER contact sites with the Golgi, endosomes, and mitochondria.
November 16, 2017: Cell
https://www.readbyqxmd.com/read/29149498/association-between-a-single-nucleotide-polymorphism-in-the-grem1-gene-and-nonsyndromic-orofacial-cleft-in-the-chinese-population
#9
Xiaotong Wang, Hongquan Song, Xiaohui Jiao, Yanru Hao, Wei Zhang, Yuwei Gao, Yong Li, Na Mi, Jiaqun Yan
BACKGROUND: Nonsyndromic orofacial cleft (NSOC) is a common craniofacial deformity among newborns. The GREM1 gene is correlated with orofacial development. The aim of our study was to investigate the association between a single-nucleotide polymorphism in the GREM1 gene and this malformation in the Chinese population. METHODS: The SNaPshot mini sequencing technique was used to genotype the locus rs1258763 of the GREM1 gene in 331 patients with NSOC and 271 individuals in a control group...
November 17, 2017: Journal of Oral Pathology & Medicine
https://www.readbyqxmd.com/read/29149043/local-homing-navigation-based-on-the-moment-model-for-landmark-distribution-and-features
#10
Changmin Lee, DaeEun Kim
[-10]For local homing navigation, an agent is supposed to return home based on the surrounding environmental information. According to the snapshot model, the home snapshot and the current view are compared to determine the homing direction. In this paper, we propose a novel homing navigation method using the moment model. The suggested moment model also follows the snapshot theory to compare the home snapshot and the current view, but the moment model defines a moment of landmark inertia as the sum of the product of the feature of the landmark particle with the square of its distance...
November 17, 2017: Sensors
https://www.readbyqxmd.com/read/29143778/the-forty-sixth-euro-congress-on-drug-synthesis-and-analysis-snapshot-%C3%A2
#11
Pavel Mucaji, Atanas G Atanasov, Andrzej Bak, Violetta Kozik, Karolina Sieron, Mark Olsen, Weidong Pan, Yazhou Liu, Shengchao Hu, Junjie Lan, Norbert Haider, Robert Musiol, Jan Vanco, Marc Diederich, Seungwon Ji, Jan Zitko, Dongdong Wang, Danica Agbaba, Katarina Nikolic, Slavica Oljacic, Jelica Vucicevic, Daniela Jezova, Anna Tsantili-Kakoulidou, Fotios Tsopelas, Constantinos Giaginis, Teresa Kowalska, Mieczyslaw Sajewicz, Jerzy Silberring, Przemyslaw Mielczarek, Marek Smoluch, Izabela Jendrzejewska, Jaroslaw Polanski, Josef Jampilek
The 46th EuroCongress on Drug Synthesis and Analysis (ECDSA-2017) was arranged within the celebration of the 65th Anniversary of the Faculty of Pharmacy at Comenius University in Bratislava, Slovakia from 5-8 September 2017 to get together specialists in medicinal chemistry, organic synthesis, pharmaceutical analysis, screening of bioactive compounds, pharmacology and drug formulations; promote the exchange of scientific results, methods and ideas; and encourage cooperation between researchers from all over the world...
October 28, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29141960/rapid-molecular-assays-to-study-human-centromere-genomics
#12
Rafael Contreras-Galindo, Sabrina Fischer, Anjan K Saha, John D Lundy, Patrick W Cervantes, Mohamad Mourad, Claire Wang, Brian Qian, Manhong Dai, Fan Meng, Arul Chinnaiyan, Gilbert S Omenn, Mark H Kaplan, David M Markovitz
The centromere is the structural unit responsible for the faithful segregation of chromosomes. Although regulation of centromeric function by epigenetic factors has been well-studied, the contributions of the underlying DNA sequences have been much less well defined, and existing methodologies for studying centromere genomics in biology are laborious. We have identified specific markers in the centromere of 23 of the 24 human chromosomes that allow for rapid PCR assays capable of capturing the genomic landscape of human centromeres at a given time...
November 15, 2017: Genome Research
https://www.readbyqxmd.com/read/29140363/snapshot-second-harmonic-generation-polarimeter-based-on-spectral-analysis
#13
Matthieu Dubreuil, Sylvain Rivet, Yann Le Grand
A new high-speed second-harmonic generation (SHG) polarimetric method is reported. It is based on the spectral analysis of the SHG radiation emitted by a nonlinear medium excited with circularly polarized femtosecond laser pulses. The setup uses only passive components for polarization encoding and a fast spectrometer for spectral analysis. The method is validated on a z-cut quartz plate, then on a collagen-rich biological tissue with a view to single image polarization-resolved SHG microscopy.
November 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/29140313/a-new-low-complexity-angle-of-arrival-algorithm-for-1d-and-2d-direction-estimation-in-mimo-smart-antenna-systems
#14
Mohammed A G Al-Sadoon, Nazar T Ali, Yousf Dama, Abdulkareim Zuid, Stephen M R Jones, Raed A Abd-Alhameed, James M Noras
This paper proposes a new low complexity angle of arrival (AOA) method for signal direction estimation in multi-element smart wireless communication systems. The new method estimates the AOAs of the received signals directly from the received signals with significantly reduced complexity since it does not need to construct the correlation matrix, invert the matrix or apply eigen-decomposition, which are computationally expensive. A mathematical model of the proposed method is illustrated and then verified using extensive computer simulations...
November 15, 2017: Sensors
https://www.readbyqxmd.com/read/29138646/the-characteristics-of-tcm-clinical-trials-a-systematic-review-of-clinicaltrials-gov
#15
REVIEW
Junchao Chen, Jihan Huang, Jordan V Li, Yinghua Lv, Yingchun He, Qingshan Zheng
Objective: The aim of this review is to characterize current status of global TCM clinical trials registered in ClinicalTrials.gov. Methods: We examined all the trials registered within ClinicalTrials.gov up to 25 September 2015, focusing on study interventions to identify TCM-related trials, and extracted 1,270 TCM trials from the data set. Results: Overall, 691 (54.4%) trials were acupuncture, and 454 (35.8%) trials were herbal medicines...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29136511/snapshot-chronic-lymphocytic-leukemia
#16
Elisa Ten Hacken, Romain Guièze, Catherine J Wu
Despite the recent advances in the therapeutic management of Chronic Lymphocytic Leukemia (CLL) patients, this common B cell malignancy still remains incurable. This SnapShot provides an overview of CLL biology and therapy, with a focus on genetics and microenvironmental interactions, which contribute to disease progression and therapy resistance. To view this SnapShot, open or download the PDF.
November 13, 2017: Cancer Cell
https://www.readbyqxmd.com/read/29133841/nanopore-electric-snapshots-of-an-rna-tertiary-folding-pathway
#17
Xinyue Zhang, Dong Zhang, Chenhan Zhao, Kai Tian, Ruicheng Shi, Xiao Du, Andrew J Burcke, Jing Wang, Shi-Jie Chen, Li-Qun Gu
The chemical properties and biological mechanisms of RNAs are determined by their tertiary structures. Exploring the tertiary structure folding processes of RNA enables us to understand and control its biological functions. Here, we report a nanopore snapshot approach combined with coarse-grained molecular dynamics simulation and master equation analysis to elucidate the folding of an RNA pseudoknot structure. In this approach, single RNA molecules captured by the nanopore can freely fold from the unstructured state without constraint and can be programmed to terminate their folding process at different intermediates...
November 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/29132332/first-and-second-year-medical-students-identify-and-self-stereotype-more-as-doctors-than-as-students-a-questionnaire-study
#18
Bryan Burford, Harriet E S Rosenthal-Stott
BACKGROUND: The emergence of medical students' professional identity is important. This paper considers this in a snapshot of the early years of undergraduate medical education. From the perspective of social identity theory, it also considers self-stereotyping, the extent to which individuals associate with attributes identified as typical of groups. METHOD: Paper questionnaires were completed by first and second year medical students following teaching sessions at the beginning (October) and end (April) of the academic year...
November 13, 2017: BMC Medical Education
https://www.readbyqxmd.com/read/29131941/a-molecular-level-understanding-of-template-effects-in-ionic-liquids
#19
Roman Elfgen, Oldamur Hollóczki, Barbara Kirchner
The structure-directing or template effect has been invoked several times for ionic liquids to explain the different outcome in material synthesis, namely, different scaffolds or geometrical arrangements with varying ionic liquids. It is obvious to assume that such an effect can originate from the most likely complex microstructure, being present within the ionic liquid itself. In that regard, ionic liquids have already been shown to undergo a nanosegregation into polar and nonpolar phases, which is commonly known and denoted as microheterogeneity...
November 13, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29130504/mass-spectrometry-based-metabolomics-targeting-the-crosstalk-between-gut-microbiota-and-brain-in-neurodegenerative-disorders
#20
REVIEW
Hemi Luan, Xian Wang, Zongwei Cai
Metabolomics seeks to take a "snapshot" in a time of the levels, activities, regulation and interactions of all small molecule metabolites in response to a biological system with genetic or environmental changes. The emerging development in mass spectrometry technologies has shown promise in the discovery and quantitation of neuroactive small molecule metabolites associated with gut microbiota and brain. Significant progress has been made recently in the characterization of intermediate role of small molecule metabolites linked to neural development and neurodegenerative disorder, showing its potential in understanding the crosstalk between gut microbiota and the host brain...
November 12, 2017: Mass Spectrometry Reviews
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