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https://www.readbyqxmd.com/read/28728997/sepsis-reconsidered-identifying-novel-metrics-for-behavioral-landscape-characterization-with-a-high-performance-computing-implementation-of-an-agent-based-model
#1
Chase Cockrell, Gary An
OBJECTIVES: Sepsis affects nearly 1 million people in the United States per year, has a mortality rate of 28-50% and requires more than $20 billion a year in hospital costs. Over a quarter century of research has not yielded a single reliable diagnostic test or a directed therapeutic agent for sepsis. Central to this insufficiency is the fact that sepsis remains a clinical/physiological diagnosis representing a multitude of molecularly heterogeneous pathological trajectories. Advances in computational capabilities offered by High Performance Computing (HPC) platforms call for an evolution in the investigation of sepsis to attempt to define the boundaries of traditional research (bench, clinical and computational) through the use of computational proxy models...
July 17, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28727999/drug-ion-co-delivery-multi-functional-nanocarrier-to-regenerate-infected-tissue-defect
#2
Jung-Hwan Lee, Ahmed El-Fiqi, Nandin Mandakhbayar, Hae-Hyoung Lee, Hae-Won Kim
Regeneration of infected tissues is a globally challenging issue in medicine and dentistry. Common clinical therapies involving a complete removal of infected areas together with a treatment of antimicrobial drugs are often suboptimal. Biomaterials with anti-bacterial and pro-regenerative potential can offer a solution to this. Here we design a novel nanocarrier based on a mesoporous silicate-calcium glass by doping with Ag ions and simultaneously loading antimicrobial drugs onto mesopores. The nanocarriers could controllably release multiple ions (silver, calcium, and silicate) and drugs (tetracycline or chlorohexidine) to levels therapeutically relevant, and effectively internalize to human dental stem cells (∼90%) with excellent viability, ultimately stimulating odontogenic differentiation...
July 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/28727859/space-flight-associated-neuro-ocular-syndrome
#3
Andrew G Lee, Thomas H Mader, C Robert Gibson, William Tarver
New and unique physiologic and pathologic systemic and neuro-ocular responses have been documented in astronauts during and after long-duration space flight. Although the precise cause remains unknown, space flight-associated neuro-ocular syndrome (SANS) has been adopted as an appropriate descriptive term. The Space Medicine Operations Division of the US National Aeronautics and Space Administration (NASA) has documented the variable occurrence of SANS in astronauts returning from long-duration space flight on the International Space Station...
July 20, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28719221/biosimilars-biologics-that-meet-patients-needs-and-healthcare-economics
#4
Mark McCamish, William Yoon, James McKay
Biologics have revolutionized medical care, yet uniform access to these effective medicines remains difficult due to the increasing costs of healthcare. As patent exclusivity on the early biologics wanes, regulatory and legal systems are adapting to bring competition to the field in the form of biosimilars. Biosimilars are biologics that offer the same clinical benefit in one or more of the same indications as the reference biologic drug and bring competition to the biologics space. Legislation creating a pathway resulting in the first US approvals of biosimilars has been in place since 2010, but the regulatory methodology and science of evaluating the sameness of two biologics has been in use for decades...
September 2016: American Journal of Managed Care
https://www.readbyqxmd.com/read/28715203/a-bioinorganic-approach-to-fragment-based-drug-discovery-targeting-metalloenzymes
#5
Seth M Cohen
Metal-dependent enzymes (i.e., metalloenzymes) make up a large fraction of all enzymes and are critically important in a wide range of biological processes, including DNA modification, protein homeostasis, antibiotic resistance, and many others. Consequently, metalloenzymes represent a vast and largely untapped space for drug development. The discovery of effective therapeutics that target metalloenzymes lies squarely at the interface of bioinorganic and medicinal chemistry and requires expertise, methods, and strategies from both fields to mount an effective campaign...
July 17, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28714250/development-of-antimicrobial-nanoemulsion-based-delivery-systems-against-selected-pathogenic-bacteria-using-a-thymol-rich-thymus-daenensis-essential-oil
#6
Lida Ghaderi, Roya Moghimi, Atousa Aliahmadi, David Julian McClements, Hasan Rafati
AIMS: Thymol rich medicinal plants have been used in traditional medicine to relieve infectious diseases. However, the application of essential oils as medicine is limited by its low water-solubility and high vapor pressure. The objective of this study was to produce stable nanoemulsions of Thymus daenensis oil in water by preventing Ostwald ripening and phase separation. METHODS & RESULTS: The antibacterial activity of bulk and emulsified essential oil against selected pathogenic bacteria including Gram-negative (Haemophilus influenzae, Pseudomonas aeruginosa) and Gram-positive (Streptococcus pneumoniae) were investigated in the liquid and vapor phase...
July 17, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28714120/partial-fourier-techniques-in-single-shot-cross-term-spatiotemporal-encoded-mri
#7
Zhiyong Zhang, Lucio Frydman
PURPOSE: Cross-term spatiotemporal encoding (xSPEN) is a single-shot approach with exceptional immunity to field heterogeneities, the images of which faithfully deliver 2D spatial distributions without requiring a priori information or using postacquisition corrections. xSPEN, however, suffers from signal-to-noise ratio penalties due to its non-Fourier nature and due to diffusion losses-especially when seeking high resolution. This study explores partial Fourier transform approaches that, acting along either the readout or the spatiotemporally encoded dimensions, reduce these penalties...
July 16, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28713872/systems-medicine-complexity-within-simplicity-without
#8
EDITORIAL
Richard Berlin, Russell Gruen, James Best
This paper presents a brief history of Systems Theory, progresses to Systems Biology, and its relation to the more traditional investigative method of reductionism. The emergence of Systems Medicine represents the application of Systems Biology to disease and clinical issues. The challenges faced by this transition from Systems Biology to Systems Medicine are explained; the requirements of physicians at the bedside, caring for patients, as well as the place of human-human interaction and the needs of the patients are addressed...
2017: J Healthc Inform Res
https://www.readbyqxmd.com/read/28712298/the-fragment-network-a-chemistry-recommendation-engine-built-using-a-graph-database
#9
Richard J Hall, Christopher W Murray, Marcel L Verdonk
The hit validation stage of a fragment-based drug discovery campaign involves probing the SAR around one or more fragment hits. This often requires a search for similar compounds in a corporate collection or from commercial suppliers. The Fragment Network is a graph database that allows a user to efficiently search chemical space around a compound of interest. The result set is chemically intuitive, naturally grouped by substitution pattern and meaningfully sorted according to the number of observations of each transformation in medicinal chemistry databases...
July 15, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28710054/preliminary-evidence-for-the-emergence-of-a-health-care-online-community-of-practice-using-a-netnographic-framework-for-twitter-hashtag-analytics
#10
Damian Roland, Jesse Spurr, Daniel Cabrera
BACKGROUND: Online communities of practice (oCoPs) may emerge from interactions on social media. These communities offer an open digital space and flat role hierarchy for information sharing and provide a strong group identity, rapid flow of information, content curation, and knowledge translation. To date, there is only a small body of evidence in medicine or health care to verify the existence of an oCoP. OBJECTIVE: We aimed to examine the emergence of an oCoP through the study of social media interactions of the free open access medical education (FOAM) movement...
July 14, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28707852/medicine-and-the-making-of-a-city-spaces-of-pharmacy-and-scholarly-medicine-in-seventeenth-century-stockholm
#11
Hjalmar Fors
This essay takes seventeenth-century Stockholm as its point of departure in discussing the many spaces to which early modern medicine belonged, in particular the court, the cityscape, the site of the pharmacy, and the city’s Collegium Medicum. It shows how scholarly medicine and pharmacy arose along with the city itself. They were a part of the city and of its many interlaced local, European, and global flows and relationships. Thus the essay offers new perspectives on medicine as part of, and a driving force behind, Stockholm’s transition from a medieval town to the capital of an early modern state, as well as the city’s integration into the early modern system of global trade...
September 2016: Isis; An International Review Devoted to the History of Science and its Cultural Influences
https://www.readbyqxmd.com/read/28705097/transfusion-refusal-and-the-shifting-limits-of-multicultural-accommodation
#12
Carey DeMichelis
The refusal of blood products by Jehovah's Witness patients has provoked court proceedings, social science research, and contemporary fiction, all of which emphasize a seemingly intractable conflict between religious and secular ways of being. This article takes a different approach, focusing instead on the space that Witness patients have carved out for their accommodation in a major pediatric research hospital. Using discourse analysis and interview data, I map the way moralizing discourses surrounding Witness families have shifted over the past 70 years alongside advancements in bloodless medicine...
July 1, 2017: Qualitative Health Research
https://www.readbyqxmd.com/read/28693890/artemisinin-and-chinese-medicine-as-tu-science
#13
Jia-Chen Fu
The story of discovery of artemisinin highlights the diversity of scientific values across time and space. Resituating artemisinin research within a broader temporal framework allows us to understand how Chinese drugs like qinghao came to articulate a space for scientific experimentation and innovation through its embodiment of alternating clusters of meanings associated with tu and yang within scientific discourse. Tu science, which was associated with terms like native, Chinese, local, rustic, mass, and crude, articulated a radical vision of science in the service of socialist revolutionary ideals...
July 7, 2017: Endeavour
https://www.readbyqxmd.com/read/28686810/self-calibrated-correlation-imaging-with-k-space-variant-correlation-functions
#14
Yu Li, Masoud Edalati, Xingfu Du, Hui Wang, Jie J Cao
PURPOSE: Correlation imaging is a previously developed high-speed MRI framework that converts parallel imaging reconstruction into the estimate of correlation functions. The presented work aims to demonstrate this framework can provide a speed gain over parallel imaging by estimating k-space variant correlation functions. METHODS: Because of Fourier encoding with gradients, outer k-space data contain higher spatial-frequency image components arising primarily from tissue boundaries...
July 7, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28686498/perceptions-of-unprofessional-attitudes-and-behaviors-implications-for-faculty-role-modeling-and-teaching-professionalism-during-pathology-residency
#15
Mark D Brissette, Kristen A Johnson, Patricia M Raciti, Cindy B McCloskey, Dita A Gratzinger, Richard Michael Conran, Ronald E Domen, Robert D Hoffman, Miriam D Post, Cory Anthony Roberts, Amyn M Rojiani, Suzanne Zein-Eldin Powell
CONTEXT: - Changes occurring in medicine have raised issues about medical professionalism. Professionalism is included in the Core Competencies and Milestones for all pathology residents. Previous studies have looked at resident professionalism attitudes and behaviors in primary care but none have looked specifically at pathology. OBJECTIVE: - To examine behavior and attitudes toward professionalism within pathology and to determine how professionalism is taught in residency programs...
July 7, 2017: Archives of Pathology & Laboratory Medicine
https://www.readbyqxmd.com/read/28667295/moss-survival-through-in-situ-cryptobiosis-after-six-centuries-of-glacier-burial
#16
N Cannone, T Corinti, F Malfasi, P Gerola, A Vianelli, I Vanetti, S Zaccara, P Convey, M Guglielmin
Cryptobiosis is a reversible ametabolic state of life characterized by the ceasing of all metabolic processes, allowing survival of periods of intense adverse conditions. Here we show that 1) entire moss individuals, dated by (14)C, survived through cryptobiosis during six centuries of cold-based glacier burial in Antarctica, 2) after re-exposure due to glacier retreat, instead of dying (due to high rates of respiration supporting repair processes), at least some of these mosses were able to return to a metabolically active state and remain alive...
June 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28667269/novel-carbon-quantum-dots-from-egg-yolk-oil-and-their-haemostatic-effects
#17
Yan Zhao, Yue Zhang, Xiaoman Liu, Hui Kong, Yongzhi Wang, Gaofeng Qin, Peng Cao, Xingxing Song, Xin Yan, Qingguo Wang, Huihua Qu
In this study, the properties of egg yolk oil (EYO) were investigated. Water extraction, dialysis, and ultrafiltration were used to extract and purify EYO, and microscopy, spectrophotometry, and chromatography were used to identify carbon dots (CDs) present in EYO (EYO CDs). Morphology analyses demonstrated that CDs were almost spherical, with an average size of <10 nm, a lattice spacing of 0.267 nm, and a composition of mainly C, O, and Fe. The solution showed bright blue fluorescence at 365 nm. Tail haemorrhaging and liver haemorrhaging experiments showed that CD-treated mice had significantly shorter bleeding times than did control mice...
June 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28659228/are-we-failing-clinical-trials-a-case-for-strong-aggregate-outcomes
#18
D W Joyce, D K Tracy, S S Shergill
Clinical trials in psychiatry inherit methods for design and statistical analysis from evidence-based medicine. However, trials in other clinical disciplines benefit from a more specific relationship between instruments that measure disease state (e.g. biomarkers, clinical signs), the underlying pathology and diagnosis such that primary outcomes can be readily defined. Trials in psychiatry use diagnosis (i.e. a categorical label for a syndrome) as a proxy for the underlying disorder, and outcomes are defined, for example, as a percentage change in a univariate total score on some clinical instrument...
June 29, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28650175/bioactive-peptide-natural-products-as-lead-structures-for-medicinal-use
#19
Tam Dang, Roderich D Süssmuth
The need for new drugs for the treatment of various diseases is enormous. From the previous century until the present, numerous peptide and peptide-derived natural products have been isolated from bacteria and fungi. Hence, microorganisms play a pivotal role as sources for novel drugs with an emphasis on anti-infective agents. Various disciplines from biology, chemistry, and medicine are involved in early stages of the search for peptide natural products including taxonomy, microbiology, bioanalytics, bioinformatics, and medicinal chemistry...
June 26, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28649627/from-the-bench-to-exploration-medicine-nasa-life-sciences-translational-research-for-human-exploration-and-habitation-missions
#20
Joshua S Alwood, April E Ronca, Richard C Mains, Mark J Shelhamer, Jeffrey D Smith, Thomas J Goodwin
NASA's Space Biology and Human Research Program entities have recently spearheaded communications both internally and externally to coordinate the agency's translational research efforts. In this paper, we strongly advocate for translational research at NASA, provide recent examples of NASA sponsored early-stage translational research, and discuss options for a path forward. Our overall objective is to help in stimulating a collaborative research across multiple disciplines and entities that, working together, will more effectively and more rapidly achieve NASA's goals for human spaceflight...
2017: NPJ Microgravity
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