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https://www.readbyqxmd.com/read/28817382/quantum-mechanical-force-fields-for-condensed-phase-molecular-simulations
#1
Timothy J Giese, Darrin M York
Molecular simulations are powerful tools for providing atomic-level details into complex chemical and physical processes that occur in the condensed phase. For strongly interacting systems where quantum many-body effects are known to play an important role, density-functional methods are often used to provide the model with the potential energy used to drive dynamics. These methods, however, suffer from two major drawbacks. First, they are often too computationally intensive to practically apply to large systems over long time scales, limiting their scope of application...
August 17, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28816059/atherothrombosis-and-oxidative-stress-mechanisms-and-management-in-elderly
#2
Francesco Violi, Lorenzo Loffredo, Roberto Carnevale, Pasquale Pignatelli, Daniele Pastori
SIGNIFICANCE The incidence of cardiovascular events increases by aging, representing the main cause of death in old population. Aging is associated with over-production of reactive oxygen species (ROS), which may affect clotting and platelet activation, and impair endothelial function so predisposing elderly patients to thrombotic complications. RECENT ADVANCES There are increasing evidences to suggest that aging is associated with an imbalance between oxidative stress and antioxidant status. Thus, up-regulation of ROS-producing enzymes such as nicotinamide adenine dinucleotide phosphate (NADPH) oxidase and myeloperoxidase, along with down-regulation of antioxidant enzymes, such as superoxide dismutase and glutathione peroxidase, occur during aging...
August 17, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28815400/advance-directives-and-the-descendant-argument
#3
Jukka Varelius
By issuing an advance treatment directive, an autonomous person can formally express what kinds of treatment she wishes and does not wish to receive in case she becomes ill or injured and unable to autonomously decide about her treatment. While many jurisdictions and medical associations endorse them, advance treatment directives have also been criticized. According to an important criticism, when a person irreversibly loses her autonomy what she formerly autonomously desired ceases to be of (central) importance in deciding about her treatment...
August 16, 2017: HEC Forum: An Interdisciplinary Journal on Hospitals' Ethical and Legal Issues
https://www.readbyqxmd.com/read/28813361/transformational-leadership-in-sport-current-status-and-future-directions
#4
REVIEW
Calum A Arthur, Nicolas Bastardoz, Robert Eklund
Borrowed from organizational psychology, the concept of transformational leadership has now been applied to a sport context for a decade. Our review covers and critically discusses empirical articles published on this growing topic. However, because the majority of studies used cross-sectional designs and single-source questionnaires to tap what has been a fuzzy construct, current theoretical and methodological issues impede understanding of whether transformational leadership matters for sport outcomes. To make a difference to applied practice and policy, the transformational leadership construct requires a refined definition and stronger empirical tests allowing for robust causal inference...
August 2017: Current Opinion in Psychology
https://www.readbyqxmd.com/read/28813328/editorial-overview-advances-in-science-and-practice-in-traumatic-stress
#5
EDITORIAL
Anka A Vujanovic, Paula P Schnurr
This issue provides an expansive overview of the field of posttraumatic stress disorder (PTSD). The featured articles highlight novel, creative, and innovative topics and methodologies, consolidate recent scientific advances, and delineate future directions. The content spans various topics in the field of traumatic stress, including assessment, biopsychosocial correlates, clinical considerations, including comorbidity, anger, self-directed violence, and dissociative manifestations, evidence-based interventions, and innovative delivery formats that maximize dissemination and implementation...
April 2017: Current Opinion in Psychology
https://www.readbyqxmd.com/read/28806952/socio-cultural-contexts-of-end-of-life-conversations-and-decisions-bereaved-family-cancer-caregivers-retrospective-co-constructions
#6
Jennifer Nyawira Githaiga, Leslie Swartz
BACKGROUND: End-of-life communication becomes increasingly difficult in terminal cancer, which inevitably entails conversations around dying and death. In resource-limited areas, the context of end-of-life communication is usually home-based palliative care comprising mostly women in the family who play critical roles as informal caregivers. This article examined the content and contexts of family end-of-life conversations and decisions based on the retrospective accounts of a sample of bereaved women family cancer caregivers in Nairobi, Kenya...
August 14, 2017: BMC Palliative Care
https://www.readbyqxmd.com/read/28804547/epha2-targeted-intratumoral-therapy-for-non-small-cell-lung-cancer-using-albumin-mesospheres
#7
Hung-Yen Lee, Kamal A Mohammed, Fredric Kaye, Brij M Moudgil, Najmunnisa Nasreen
Lung cancer, primarily non-small cell lung cancer (NSCLC), is the leading cause of cancer mortality and the prognosis of patients with advanced or metastatic NSCLC is poor. Despite significant advances in diagnosis and treatment, little improvement has been seen in NSCLC mortality. Recently, Intratumoral Chemotherapy, a direct local delivery of chemotherapeutic drugs, has shown promise in clinical studies. However, toxicity and high dosage of chemotherapeutic agents used for treatment are a limitation. Moreover, these drugs damage indiscriminately, cancerous as well as normal tissues...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28804537/an-integrated-approach-to-coronary-heart-disease-diagnosis-and-clinical-management
#8
REVIEW
Teresa Infante, Ernesto Forte, Concetta Schiano, Carlo Cavaliere, Carlo Tedeschi, Andrea Soricelli, Marco Salvatore, Claudio Napoli
The major issue in coronary heart disease (CHD) diagnosis and management is that symptoms onset in an advanced state of disease. Despite the availability of several clinical risk scores, the prediction of cardiovascular events is lacking, and many patients at risk are not well stratified according to the canonical risk factors alone. Therefore, adequate risk assessment remains the most challenging issue. Recently, the integration of imaging data with biochemical markers in a radiogenomic framework has been proposed in many fields of medicine as well as in cardiology...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28799250/extracellular-vesicles-nature-s-nanoparticles-for-improving-gene-transfer-with-adeno-associated-virus-vectors
#9
REVIEW
Bence György, Casey A Maguire
Gene therapy, the ability to treat a disease at the level of nucleic acid, has journeyed from science fiction, to hard lessons learned from early clinical trials, to improved technologies with efficacy in patients for several diseases. Adeno-associated virus (AAV) vectors are currently a leader for direct in vivo gene therapy. To date, AAV is safe in patients, with clinical benefit in trials to treat blindness, hemophilia, and a lipid disorder, with many more trials underway. Despite this remarkable progress, barriers exist for AAV vectors to be effective gene transfer vehicles in all organ/cell targets, as well as patient subpopulations...
August 11, 2017: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
https://www.readbyqxmd.com/read/28797972/recent-applications-of-plga-based-nanostructures-in-drug-delivery
#10
REVIEW
Maria Mir, Naveed Ahmed, Asim Ur Rehman
Over the years, issues associated with non-biodegradable polymers have paved the way for biodegradable polymers in the domain of pharmaceutical and biomedical sciences. Poly (lactic-co-glycolic acid) (PLGA) is considered one of the most thrivingly synthesized biodegradable polymers. To formulate polymeric nanostructures, PLGA has attained noteworthy attention due to its controllable properties, complete biodegradability and biocompatibility, well defined formulation techniques and easy processing. This review focuses on fabrication techniques of PLGA based nanostructures and their advanced biomedical applications covering drug delivery and in-vivo imaging...
July 28, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28796100/single-stage-reconstruction-of-eyebrow-defect-using-a-v-y-advancement-pedicle-flap-based-on-the-orbicularis-oculi-muscle
#11
Hai-Peng Liu, Ying Shao, Duo Zhang
Eyebrows play an important role in face expression and facial mimics by virtue of muscle contraction. Defects or deformity of the eyebrows result in abnormal facial expressions, and may lead to aesthetic issues for patients. The objective of this study is to report the case of a patient, with a congenital skin pigmented nevus at the right side of the eyebrow treated with direct surgical resection and followed by immediate reconstruction of the eyebrow with a V-Y advancement pedicle flap based on the orbicularis oculi muscle...
August 8, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28795351/advancements-in-understanding-immunogenicity-of-biotherapeutics-in-the-intraocular-space
#12
Eric Wakshull, Valerie Quarmby, Hanns-Christian Mahler, Hongwen Rivers, Dhananjay Jere, Meg Ramos, Piotr Szczesny, Karoline Bechtold-Peters, Sharmila Masli, Swati Gupta
Therapeutic breakthroughs in a number of retinal degenerative diseases have come about through the development of biotherapeutics administered directly into the eye. As a consequence of their use, we have gained more insight into the immune privileged status of the eye and the various considerations that development, manufacturing, and use of these drugs require. It has been observed that therapeutic proteins injected into the vitreous can elicit an immune response resulting in the production of anti-drug antibodies (ADAs) which can have clinical consequences...
August 9, 2017: AAPS Journal
https://www.readbyqxmd.com/read/28789933/radiation-protection-in-dental-radiology-recent-advances-and-future-directions
#13
V Tsapaki
Dental radiology uses X-ray technology to diagnose and design treatment of various clinical problems related to the oral cavity and surrounding tissues. As technology quickly evolves, there are numerous X-ray modalities using different tools in the attempt to best image and treat efficiently these diseases, disorders or other related clinical conditions. The reported numbers of dental X-rays, the fact that these may be under-reported in many countries and because dental X-rays are performed more on younger individuals, whose teeth and dentition are still developing, calls for increased need on radiation protection...
August 5, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28776056/diversified-copper-sulfide-cu2-xs-micro-nanostructures-a-comprehensive-review-on-synthesis-modifications-and-applications
#14
REVIEW
Shaodong Sun, Pengju Li, Shuhua Liang, Zhimao Yang
As a significant metal chalcogenide, copper sulfide (Cu2-xS, 0 < x < 1), with a unique semiconducting and nontoxic nature, has received significant attention over the past few decades. Extensive investigations have been employed to the various Cu2-xS micro-/nanostructures owing to their excellent optoelectronic behavior, potential thermoelectric properties, and promising biomedical applications. As a result, micro-/nanostructured Cu2-xS with well-controlled morphologies, sizes, crystalline phases, and compositions have been rationally synthesized and applied in the fields of photocatalysis, energy conversion, in vitro biosensing, and in vivo imaging and therapy...
August 4, 2017: Nanoscale
https://www.readbyqxmd.com/read/28760756/estimating-adult-sex-ratios-in-nature
#15
REVIEW
Sergio Ancona, Francisco V Dénes, Oliver Krüger, Tamás Székely, Steven R Beissinger
Adult sex ratio (ASR, the proportion of males in the adult population) is a central concept in population and evolutionary biology, and is also emerging as a major factor influencing mate choice, pair bonding and parental cooperation in both human and non-human societies. However, estimating ASR is fraught with difficulties stemming from the effects of spatial and temporal variation in the numbers of males and females, and detection/capture probabilities that differ between the sexes. Here, we critically evaluate methods for estimating ASR in wild animal populations, reviewing how recent statistical advances can be applied to handle some of these challenges...
September 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28760614/regulatory-considerations-in-development-of-vaccines-to-prevent-disease-caused-by-chikungunya-virus
#16
REVIEW
Sixun Yang, Doran Fink, Andrea Hulse, R Douglas Pratt
Chikungunya virus (CHIKV) is a mosquito-transmitted alphavirus. Chikungunya disease (CHIK) in humans is characterized by sudden onset of high fever, cutaneous rash, myalgia and debilitating polyarthralgia. Until recently the virus was considered endemic to only Africa and Asia, but since 2004 CHIK has spread to previously non-endemic regions, including Europe and the Americas, thereby emerging as a global health threat. Although a variety of CHIKV vaccine candidates have been tested in animals, and a few have advanced to human clinical trials, no licensed vaccine is currently available for prevention of disease...
July 28, 2017: Vaccine
https://www.readbyqxmd.com/read/28758995/dorsal-hippocampus-contributes-to-model-based-planning
#17
Kevin J Miller, Matthew M Botvinick, Carlos D Brody
Planning can be defined as action selection that leverages an internal model of the outcomes likely to follow each possible action. Its neural mechanisms remain poorly understood. Here we adapt recent advances from human research for rats, presenting for the first time an animal task that produces many trials of planned behavior per session, making multitrial rodent experimental tools available to study planning. We use part of this toolkit to address a perennially controversial issue in planning: the role of the dorsal hippocampus...
July 31, 2017: Nature Neuroscience
https://www.readbyqxmd.com/read/28757314/using-ion-torrent-sequencing-to-study-genetic-mutation-profiles-of-fatal-thyroid-cancers
#18
Jin-Ying Lu, Wern-Cherng Cheng, Kuen-Yuan Chen, Chia-Chi Lin, Ching-Chung Chang, Kuan-Ting Kuo, Pei-Lung Chen
BACKGROUND/PURPOSE: Surgery followed by radioiodine is a mainstay of treatment for thyroid cancers of follicular origins. However, about 5% of the thyroid cancers are non-operable and/or radioiodine-refractory diseases, which are either locally advanced or metastatic and result in a survival of less than 5 years. How to treat this population of thyroid cancer patients becomes a critical issue requiring further understanding of the tumor's genetic information. METHODS: We used formalin-fixed paraffin-embedded specimens of 22 fatal thyroid cancers and their corresponding non-tumor parts, if available, to yield genomic DNA, and applied the Ion Torrent™ Personal Genome Machine (IT-PGM) System (Life Technologies), a next generation sequencing technology, to interrogate 740 mutational hotspots in 46 oncogenes...
July 27, 2017: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/28753402/intellectual-disability-policy-as-developed-expressed-and-evaluated-in-aaidd-the-arc-joint-statements-the-role-of-organization-position-statements
#19
Ruth Luckasson, Marty E Ford, Elise D McMillan, Frederick M Misilo, Margaret A Nygren
The American Association on Intellectual and Developmental Disabilities (AAIDD) and The Arc of the United States (The Arc) have a long history of joined efforts to develop, express, and evaluate disability policies. These efforts have resulted in a series of formal statements on critical issues such as education, healthcare, human rights, and criminal justice. Their joint efforts further important policy goals including providing clear strong communication about important policy values and directions, promulgating key principles of high quality supports and services, affirming best professional practices, and emphasizing personal outcomes...
July 2017: Intellectual and Developmental Disabilities
https://www.readbyqxmd.com/read/28748743/community-based-game-intervention-to-improve-south-asian-indian-americans-engagement-with-advanced-care-planning
#20
Kavita Radhakrishnan, Lauren Jodi Van Scoy, Regina Jillapalli, Shubhada Saxena, Miyong T Kim
OBJECTIVE: Advance care planning (ACP) allows individuals to express their preferences for medical treatment in the event that they become incapable of making their own decisions. This study assessed the efficacy of a conversation game intervention for increasing South Asian Indian Americans' (SAIAs') engagement in ACP behaviors as well as the game's acceptability and cultural appropriateness among SAIAs. DESIGN: Eligible community-dwelling SAIAs were recruited at SAIA cultural events held in central Texas during the summer of 2016...
July 27, 2017: Ethnicity & Health
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