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https://www.readbyqxmd.com/read/28196894/extending-enzyme-molecular-recognition-with-an-expanded-amino-acid-alphabet
#1
Claire L Windle, Katie J Simmons, James R Ault, Chi H Trinh, Adam Nelson, Arwen R Pearson, Alan Berry
Natural enzymes are constructed from the 20 proteogenic amino acids, which may then require posttranslational modification or the recruitment of coenzymes or metal ions to achieve catalytic function. Here, we demonstrate that expansion of the alphabet of amino acids can also enable the properties of enzymes to be extended. A chemical mutagenesis strategy allowed a wide range of noncanonical amino acids to be systematically incorporated throughout an active site to alter enzymic substrate specificity. Specifically, 13 different noncanonical side chains were incorporated at 12 different positions within the active site of N-acetylneuraminic acid lyase (NAL), and the resulting chemically modified enzymes were screened for activity with a range of aldehyde substrates...
February 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28196720/village-energy-survey-reveals-missing-rural-raw-coal-in-northern-china-significance-in-science-and-policy
#2
Guorui Zhi, Yayun Zhang, Jianzhong Sun, Miaomiao Cheng, Hongyan Dang, Shijie Liu, Junchao Yang, Yuzhe Zhang, Zhigang Xue, Shuyuan Li, Fan Meng
Burning coal for winter heating has been considered a major contributor to northern China's winter haze, with the district heating boilers holding the balance. However a decade of intensive efforts on district heating boilers brought few improvements to northern China's winter air quality, arousing a speculation that the household heating stoves mainly in rural area rather than the district heating boilers mainly in urban area dominate coal emissions in winter. This implies an extreme underestimation of rural household coal consumption by the China Energy Statistical Yearbooks (CESYs), although direct evidence supporting this speculation is lacking...
February 10, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28188112/thrombin-induces-inositol-trisphosphate-mediated-spatially-extensive-responses-in-lung-microvessels
#3
Rachel Escue, Kathirvel Kandasamy, Kaushik Parthasarathi
Activation of plasma membrane receptors initiates compartmentalized second messenger signaling. Whether this compartmentalization facilitates the preferential intercellular diffusion of specific second messengers is unclear. Toward this, the receptor-mediated agonist, thrombin, was instilled into microvessels in a restricted region of isolated blood-perfused mouse lungs. Subsequently, the thrombin-induced increase in endothelial F-actin was determined using confocal fluorescence microscopy. Increased F-actin was evident in microvessels directly treated with thrombin and in those located in adjoining thrombin-free regions...
February 8, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28148535/cohort-profile-the-scottish-research-register-share-a-register-of-people-interested-in-research-participation-linked-to-nhs-data-sets
#4
Brian McKinstry, Frank M Sullivan, Shobna Vasishta, Roma Armstrong, Janet Hanley, John Haughney, Sam Philip, Blair H Smith, Amanda Wood, Colin N A Palmer
PURPOSE: Recruitment to trials is often difficult. Many trials fail to meet recruitment targets resulting in underpowered studies which waste resources and the time of those who participated. While there is evidence that many people are willing to take part in research, particularly if it involves a condition from which they suffer, researchers are unable to easily contact such people often relying on busy clinicians to identify them. Many clinicians perceive themselves as too busy to take part in research activities...
February 1, 2017: BMJ Open
https://www.readbyqxmd.com/read/28148207/clinical-cancer-advances-2017-annual-report-on-progress-against-cancer-from-the-american-society-of-clinical-oncology
#5
Harold J Burstein, Lada Krilov, Jeanny B Aragon-Ching, Nancy N Baxter, E Gabriela Chiorean, Warren Allen Chow, John Frederick De Groot, Steven Michael Devine, Steven G DuBois, Wafik S El-Deiry, Andrew S Epstein, John Heymach, Joshua Adam Jones, Deborah K Mayer, Rebecca A Miksad, Nathan A Pennell, Michael S Sabel, Richard L Schilsky, Lynn Mara Schuchter, Nadine Tung, Karen Marie Winkfield, Lori J Wirth, Don S Dizon
A MESSAGE FROM ASCO'S PRESIDENT I am pleased to present Clinical Cancer Advances 2017, which highlights the most promising advances in patient-oriented cancer research over the past year. The report gives us an opportunity to reflect on what an exciting time it is for cancer research and how swiftly our understanding of cancer has improved. One year ago, the White House announced the national Cancer Moonshot program to accelerate progress against cancer. This shared vision of progress has reinvigorated the research community, identified new areas of scientific collaboration, and raised our ambitions regarding what may be possible beyond the progress we have already made...
February 1, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28139964/the-taiwan-tobacco-and-liquor-corporation-to-join-the-ranks-of-global-companies
#6
Jappe Eckhardt, Jennifer Fang, Kelley Lee
Until the late 1990s, the Taiwan Tobacco and Liquor Corporation (TTL) focused almost exclusively on serving the domestic market as a highly protected monopoly. This paper describes how the company has adopted a more outward looking strategy since 2000, with ambitions to become a regional, and eventually global, business by 2021. Drawing on company documents and industry sources, the paper argues that this shift in strategy was a direct reaction to the decline in domestic market share following liberalisation of the Taiwanese tobacco market and adoption of tougher domestic tobacco control measures...
March 2017: Global Public Health
https://www.readbyqxmd.com/read/28132183/chronic-diseases-and-lifestyle-biomarkers-identification-by-metabolomics
#7
Annalaura Mastrangelo, Coral Barbas
Chronic diseases, also known as noncommunicable diseases (NCDs), are complex disorders that last for long periods of time and progress slowly. They currently account for the major cause of death worldwide with an alarming increase in rate both in developed and developing countries. In this chapter, the principal metabolomic-based investigations on chronic diseases (cardiovascular diseases, diabetes, and respiratory chronic diseases) and their major risk factors (particularly overweight/obesity) are described by focusing both on metabolites and metabolic pathways...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28130508/global-ambition
#8
(no author information available yet)
No abstract text is available yet for this article.
January 28, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28087691/imaging-proteins-at-the-single-molecule-level
#9
Jean-Nicolas Longchamp, Stephan Rauschenbach, Sabine Abb, Conrad Escher, Tatiana Latychevskaia, Klaus Kern, Hans-Werner Fink
Imaging single proteins has been a long-standing ambition for advancing various fields in natural science, as for instance structural biology, biophysics, and molecular nanotechnology. In particular, revealing the distinct conformations of an individual protein is of utmost importance. Here, we show the imaging of individual proteins and protein complexes by low-energy electron holography. Samples of individual proteins and protein complexes on ultraclean freestanding graphene were prepared by soft-landing electrospray ion beam deposition, which allows chemical- and conformational-specific selection and gentle deposition...
January 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28078429/aims-and-tasks-in-parental-caregiving-for-children-receiving-palliative-care-at-home-a-qualitative-study
#10
Lisa M Verberne, Marijke C Kars, Antoinette Y N Schouten-van Meeteren, Diederik K Bosman, Derk A Colenbrander, Martha A Grootenhuis, Johannes J M van Delden
: In paediatric palliative care (PPC), parents are confronted with increasing caregiving demands. More children are cared for at home, and the need for PPC of children is lengthened due to technical and medical improvements. Therefore, a clear understanding of the content of parental caregiving in PPC becomes increasingly important. The objective is to gain insight into parental caregiving based on the lived experience of parents with a child with a life-limiting disease. An interpretative qualitative study using thematic analysis was performed...
January 11, 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/28076579/factors-that-influence-career-choice-in-primary-care-among-medical-students-starting-social-service-in-honduras
#11
E Benjamín Puertas, Tamara Y Rivera
Objective: To 1) describe patterns of specialty choice; 2) investigate relationships between career selection and selected demographic indicators; and 3) identify salary perception, factors that influence career choice in primary care, and factors that influence desired location of future medical practice. Methods: The study used a mixed-methods approach that included a cross-sectional questionnaire survey applied to 234 last-year medical students in Honduras (September 2014), and semi-structured interviews with eight key informants (October 2014)...
November 2016: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
https://www.readbyqxmd.com/read/28049182/the-ambition-of-the-european-respiratory-journal-continues-chapter-5
#12
EDITORIAL
Marc Humbert, Anh Tuan Dinh-Xuan, Elin L Reeves, Matthew G Broadhead, Neil J Bullen
No abstract text is available yet for this article.
January 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28043952/implementing-electronic-records-in-nhs-secondary-care-organizations-in-england-policy-and-progress-since-1998
#13
REVIEW
Arabella Clarke, Ian Watt, Laura Sheard, John Wright, Joy Adamson
BACKGROUND: A number of different policies have aimed to introduce electronic records into National Health Service (NHS) secondary care organizations in England over recent years. There has been little formal attempt to explore the overall impact of these policies (as opposed to evaluations of individual initiatives) and how they have developed and progressed over time. SOURCES OF DATA: National NHS IT policy documents and evaluations of national NHS IT policy between 1998 and 2015...
January 1, 2017: British Medical Bulletin
https://www.readbyqxmd.com/read/28039187/initial-combination-therapy-with-ambrisentan-and-tadalafil-in-connective-tissue-disease-associated-pulmonary-arterial-hypertension-ctd-pah-subgroup-analysis-from-the-ambition-trial
#14
John Gerry Coghlan, Nazzareno Galiè, Joan Albert Barberà, Adaani E Frost, Hossein-Ardeschir Ghofrani, Marius M Hoeper, Masataka Kuwana, Vallerie V McLaughlin, Andrew J Peacock, Gérald Simonneau, Jean-Luc Vachiéry, Christiana Blair, Hunter Gillies, Karen L Miller, Julia H N Harris, Jonathan Langley, Lewis J Rubin
BACKGROUND: Patients with connective tissue disease-associated pulmonary arterial hypertension (CTD-PAH), in particular systemic sclerosis (SSc), had an attenuated response compared with idiopathic PAH in most trials. Thus, there is uncertainty regarding the benefit of PAH-targeted therapy in some forms of CTD-PAH. OBJECTIVE: To explore the safety and efficacy of initial combination therapy with ambrisentan and tadalafil versus ambrisentan or tadalafil monotherapy in patients with CTD-PAH and SSc-PAH enrolled in the AMBITION trial...
December 30, 2016: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28024361/monitoring-dynamic-cellular-redox-homeostasis-using-fluorescence-switchable-graphene-quantum-dots
#15
Nan Li, Aung Than, Chencheng Sun, Jingqi Tian, Jie Chen, Kanyi Pu, Xiaochen Dong, Peng Chen
Monitoring cellular redox homeostasis is critical to the understanding of many physiological functions ranging from immune reactions to metabolism, as well as to the understanding of pathological development ranging from tumorigenesis to aging. Nevertheless, there is currently a lack of appropriate probes for this ambition, which should be reversibly, sensitively, and promptly responsive to a wide range of physiological oxidants and reductants. In this work, a redox-sensitive fluorescence-switchable probe is designed based on graphene quantum dots (GQDs) functionalized with a chelated redox Fe(2+)/Fe(3+) couple...
December 27, 2016: ACS Nano
https://www.readbyqxmd.com/read/28018856/time-and-circumstances-cancer-cell-metabolism-at-various-stages-of-disease-progression
#16
REVIEW
Georg F Weber
Over the past decade, research into the unique ways, in which cancer cells skew their metabolism, has had a renaissance-for the repeated time over more than 80 years since the discovery of an inherent preference for glycolysis. Importantly, the Warburg effect that arises in primary neoplasms is not the sole prominent metabolic phenomenon. Once the transformed cells are shed from their initial growth and begin the process of metastasis, their energy requirements change and they adapt to the increased demand for adenosine triphosphate, which if not satisfied would lead to anoikis...
2016: Frontiers in Oncology
https://www.readbyqxmd.com/read/28009246/locating-risk-in-the-adolescent-brain-ethical-challenges-in-the-use-of-biomarkers-for-adolescent-health-and-social-policy
#17
Suparna Choudhury, Sheehan Moore
Technological developments in neuroscience over the last 20 years have generated excitement about the potential of neuroscientific insights for the understanding of and intervention in children's and adolescents' behavior. This article introduces some ways in which new results from developmental cognitive neuroscience have been appropriated in the context of adolescent mental health. We also consider social and interpersonal factors that drive the use of neurobiological markers of mental disorders in pediatric psychiatry...
December 1, 2016: AMA Journal of Ethics
https://www.readbyqxmd.com/read/28003793/visual-semantic-based-3d-video-retrieval-system-using-hdfs
#18
C Ranjith Kumar, S Suguna
This paper brings out a neoteric frame of reference for visual semantic based 3d video search and retrieval applications. Newfangled 3D retrieval application spotlight on shape analysis like object matching, classification and retrieval not only sticking up entirely with video retrieval. In this ambit, we delve into 3D-CBVR (Content Based Video Retrieval) concept for the first time. For this purpose, we intent to hitch on BOVW and Mapreduce in 3D framework. Instead of conventional shape based local descriptors, we tried to coalesce shape, color and texture for feature extraction...
August 2016: Data Mining and Knowledge Discovery
https://www.readbyqxmd.com/read/27998328/-apostles-of-continence-doctors-and-the-doctrine-of-sexual-necessity-in-progressive-era-america
#19
Timothy Verhoeven
In the first decades of the twentieth century, a group of doctors under the banner of the social hygiene movement set out on what seemed an improbable mission: to convince American men that they did not need sex. This was in part a response to venereal disease. Persuading young men to adopt the standard of sexual discipline demanded of women was the key to preserving the health of the nation from the ravages of syphilis and gonorrhoea. But their campaign ran up against the doctrine of male sexual necessity, a doctrine well established in medical thought and an article of faith for many patients...
January 2017: Medical History
https://www.readbyqxmd.com/read/27986235/building-a-sustainable-global-surgery-nonprofit-organization-at-an-academic-institution
#20
Margaret M Frisella
BACKGROUND: Surgical Outreach for the Americas is a 501(c)3 nonprofit organization providing surgical care to those in need in developing countries of the Western Hemisphere. Every year since its inception in 2008, teams of surgeons, nurses, and allied health professionals have traveled to areas of need and performed primarily hernia repair surgeries for those without access to affordable health care. METHODS: Surgical Outreach for the Americas (SOfA) began as a general concept based on World Health Organization statistics claiming that 11% of the global burden of disease can be resolved via surgery...
July 2016: Annals of Global Health
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