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https://www.readbyqxmd.com/read/29031152/transferrin-modified-ruthenium-nanoparticles-with-good-biocompatibility-for-photothermal-tumor-therapy
#1
Shuang Zhao, Xufeng Zhu, Chengwen Cao, Jing Sun, Jie Liu
In the past two decades, there were various kinds of photothermal agents being synthesised and investigated for their photothermal effect in antitumor applications. However, it is barely reported that the photothermal effect of Ruthenium (Ru) nanoparticles was researched in depth. In this work, we introduced Ru nanoparticles which possess excellent biocompatibility and metabolize easily to the photothermal therapy field. In addition, to improve the cells capacity of absorbing Ru nanoparticles, these Ru nanoparticles were modified by transferrin (Tf-RuNPs)...
October 7, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29031035/-controversy-in-the-postoperative-treatment-of-low-grade-gliomas
#2
T Kazda, R Lakomý, A Poprach, P Pospíšil, R Jančálek, P Šlampa
BACKGROUND: The optimal treatment for low-grade gliomas remains controversial. Neurosurgery, radiotherapy, and chemotherapy are the main treatment options. Despite advances in oncology, there are still a lot of uncertainties, and the optimal sequences, combinations, and timings of these procedures have not yet been optimized. It is still unclear whether temozolomide can replace effective, but toxic PCV chemotherapy (procarbazine, lomustine, vincristine) and whether temozolomide can be used upfront alone instead of radiotherapy alone...
2017: Klinická Onkologie: Casopis Ceské a Slovenské Onkologické Spolecnosti
https://www.readbyqxmd.com/read/29031025/measurement-variation-and-repeatability-of-echocardiographic-variables-used-to-estimate-pulmonary-artery-pressure-in-dogs
#3
J A Abbott, J M Gentile-Solomon
BACKGROUND: Pulmonary hypertension (PH) is an important clinical entity in dogs. Pulmonary hypertension is generally identified based on echocardiographic findings, but measurement variation of the variables most often used in this context has not been reported. OBJECTIVE: To define measurement variation of echocardiographic variables that are used to estimate pulmonary artery pressure. ANIMALS: Four dogs with subclinical tricuspid valve regurgitation were selected from a hospital population...
October 14, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29029308/difficult-to-treat-rheumatoid-arthritis-an-area-of-unmet-clinical-need
#4
Maria J H de Hair, Johannes W G Jacobs, Jan L M Schoneveld, Jacob M van Laar
Increased effectiveness of pharmacological treatments in early RA has led many to believe that difficult-to-treat, established RA is a condition of the past. However, there are still plenty of RA patients who continue to have signs and symptoms suggestive of inflammatory disease activity, despite consecutive treatment with multiple conventional synthetic and biological DMARDs. We argue that difficult-to-treat RA constitutes an area of unmet clinical need and propose a definition of this concept. An overview of what is known about the multiple contributory factors varying for each individual patient, and an approach towards improved patient-tailored management are presented...
October 4, 2017: Rheumatology
https://www.readbyqxmd.com/read/29029274/mutation-driven-parallel-evolution-during-viral-adaptation
#5
Andrew M Sackman, Lindsey W McGee, Anneliese J Morrison, Jessica Pierce, Jeremy Anisman, Hunter Hamilton, Stephanie Sanderbeck, Cayla Newman, Darin R Rokyta
Convergent evolution has been demonstrated across all levels of biological organization, from parallel nucleotide substitutions to convergent evolution of complex phenotypes, but whether instances of convergence are the result of selection repeatedly finding the same optimal solution to a recurring problem or are the product of mutational biases remains unsettled. We generated 20 replicate lineages allowed to fix a single mutation from each of four bacteriophage genotypes under identical selective regimes to test for parallel changes within and across genotypes at the levels of mutational effect distributions and gene, protein, amino acid, and nucleotide changes...
September 27, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/29029271/sequence-and-structural-diversity-of-mouse-y-chromosomes
#6
Andrew P Morgan, Pardo-Manuel de Villena Fernando
Over the 180 million years since their origin, the sex chromosomes of mammals have evolved a gene repertoire highly specialized for function in the male germline. The mouse Y chromosome is unique among mammalian Y chromosomes characterized to date in that it is large, gene-rich and euchromatic. Yet little is known about its diversity in natural populations. Here we take advantage of published whole-genome sequencing data to survey the diversity of sequence and copy number of sex-linked genes in three subspecies of house mice...
September 25, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/29029267/evaluation-of-universal-versus-genotype-guided-efavirenz-dose-reduction-in-pregnant-women-using-population-pharmacokinetic-modelling
#7
Adeniyi Olagunju, Alessandro Schipani, Oluseye Bolaji, Saye Khoo, Andrew Owen
Objectives: Lack of data on the pharmacokinetics of efavirenz in pregnant women at the 400 mg reduced dose currently prevents universal roll-out. Population pharmacokinetic modelling was used to explore pharmacokinetic endpoints at 200, 400 and 600 mg daily doses in pregnant women stratified by CYP2B6 metabolic status. Methods: The analysis was based on 252 plasma efavirenz concentrations from 77 pregnant women (77 sparse, 175 intensive) who received antiretroviral regimens containing 600 mg of efavirenz...
September 26, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29029259/first-experimental-assessment-of-protein-intrinsic-disorder-involvement-in-an-rna-virus-natural-adaptive-process
#8
Justine Charon, Amandine Barra, Jocelyne Walter, Pauline Millot, Eugénie Hébrard, Benoît Moury, Thierry Michon
Intrinsic disorder (ID) in proteins is defined as a lack of stable structure in physiological conditions. Intrinsically disordered regions (IDRs) are highly abundant in some RNA virus proteomes. Low topological constraints exerted on IDRs are expected to buffer the effect of numerous deleterious mutations and could be related to the remarkable adaptive potential of RNA viruses to overcome resistance of their host. To experimentally test this hypothesis in a natural pathosystem, a set of four variants of Potato virus Y (PVY; Potyvirus genus) containing various ID degrees in the Viral genome-linked (VPg) protein, a key determinant of potyvirus adaptation, was designed...
September 18, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/29029246/the-epidermal-growth-factor-network-role-in-oocyte-growth-maturation-and-developmental-competence
#9
Dulama Richani, Robert B Gilchrist
BACKGROUND: The LH surge induces great physiological changes within the preovulatory follicle, which culminate in the ovulation of a mature oocyte that is capable of supporting embryo and foetal development. However, unlike mural granulosa cells, the oocyte and its surrounding cumulus cells are not directly responsive to LH, indicating that the LH signal is mediated by secondary factors produced by the granulosa cells. The mechanisms by which the oocyte senses the ovulatory LH signal and hence prepares for ovulation has been a subject of considerable controversy for the past four decades...
September 20, 2017: Human Reproduction Update
https://www.readbyqxmd.com/read/29029202/a-metabolomic-signature-of-acute-caloric-restriction
#10
Tinh-Hai Collet, Takuhiro Sonoyama, Elana Henning, Julia M Keogh, Brian Ingram, Sarah Kelway, Lining Guo, I Sadaf Farooqi
Context: The experimental paradigm of acute caloric restriction followed by refeeding can be used to study the homeostatic mechanisms that regulate energy homeostasis, which are relevant to understanding the adaptive response to weight loss. Objective: Metabolomics, the measurement of hundreds of small molecule metabolites, their precursors, derivatives, and degradation products, has emerged as a useful tool for the study of physiology and disease and was used here to study the metabolic response to acute caloric restriction...
September 28, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29029191/evaluating-the-neolithic-expansion-at-both-shores-of-the-mediterranean-sea
#11
João Pimenta, Alexandra M Lopes, David Comas, António Amorim, Miguel Arenas
During the Neolithic, human populations underwent cultural and technological developments that led to an agricultural revolution. Although the population genetics and evolution of European Neolithic populations have been extensively studied, little is known regarding the Neolithic expansion in North Africa with respect to Europe. One could expect that the different environmental and geological conditions at both shores of the Mediterranean Sea could have led to contrasting expansions. In order to test this hypothesis, we compared the Neolithic expansion in Europe and North Africa accounting for possible migration between them through the Strait of Gibraltar...
September 26, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/29029187/evidence-for-the-selective-basis-of-transition-to-transversion-substitution-bias-in-two-rna-viruses
#12
Daniel M Lyons, Adam S Lauring
The substitution rates of transitions are higher than expected by chance relative to those of transversions. Many have argued that selection disfavors transversions, as nonsynonymous transversions are less likely to conserve biochemical properties of the original amino acid. Only recently has it become feasible to directly test this selective hypothesis by comparing the fitness effects of a large number of transition and transversion mutations. For example, a recent study of six viruses and one beta-lactamase gene did not find evidence supporting the selective hypothesis...
September 25, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/29029103/cardiovascular-disease-prevention-policy-in-hiv-recommendations-from-a-modelling-study
#13
Mikaela Smit, Rosan A van Zoest, Brooke E Nichols, Ilonca Vaartjes, Colette Smit, Marc van der Valk, Ard van Sighem, Ferdinand W Wit, Timothy B Hallett, Peter Reiss
Background: Cardiovascular disease (CVD) is expected to contribute a large non-communicable disease burden amongst HIV-positive people. We quantify the impact of prevention interventions on annual CVD burden and costs amongst HIV-positive people in The Netherlands. Methods: We constructed an individual-based model of CVD in HIV-positive people using national ATHENA cohort data on 8,791 patients on combination antiretroviral therapy (cART). The model follows patients as they age, develop CVD (by incorporating a CVD risk equation) and start cardiovascular medication...
October 6, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29029054/prostaglandin-endoperoxide-synthase-1-ptgs1-mediates-the-timing-of-parturition-in-mice-despite-unhindered-uterine-contractility
#14
Jennifer L Herington, Christine O'Brien, Michael F Robuck, Wei Lei, Naoko Brown, J Chris Slaughter, Bibhash C Paria, Anita Mahadevan-Jansen, Jeff Reese
Cyclooxygenase (COX)-derived prostaglandins stimulate uterine contractions and prepare the cervix for parturition. Prior reports suggest Cox-1 (Ptgs1) knockout (KO) mice exhibit delayed parturition due to impaired luteolysis, yet the mechanism for late-onset delivery remains unclear. Here, we examined key factors for normal onset of parturition to determine whether any could account for the delayed parturition phenotype. Pregnant Cox-1KO mice did not display altered timing of embryo implantation or post-implantation growth...
September 29, 2017: Endocrinology
https://www.readbyqxmd.com/read/29029053/a-12-year-follow-up-on-the-long-term-effectiveness-of-the-quadrivalent-human-papillomavirus-vaccine-in-4-nordic-countries
#15
Susanne K Kjaer, Mari Nygård, Joakim Dillner, J Brooke Marshall, David Radley, Meng Li, Christian Munk, Bo T Hansen, Lara G Sigurdardottir, Maria Hortlund, Laufey Tryggvadottir, Amita Joshi, Rituparna Das, Alfred J Saah
Background: The long-term effectiveness of the quadrivalent human papillomavirus (qHPV) vaccine was assessed by monitoring the combined incidence of cervical intraepithelial neoplasia (CIN2, CIN3), adenocarcinoma in situ (AIS), and cervical cancer related to HPV16 or HPV18. Methods: Women from Nordic countries of Denmark, Iceland, Norway, and Sweden who received a 3-dose regimen of the qHPV vaccine in the beginning of FUTURE II (Females United to Unilaterally Reduce Endo/Ectocervical Disease; V501-015, base study NCT00092534) are followed through different national registries...
October 1, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29029013/an-empirical-bayes-approach-for-multiple-tissue-eqtl-analysis
#16
Gen Li, Andrey A Shabalin, Ivan Rusyn, Fred A Wright, Andrew B Nobel
Expression quantitative trait locus (eQTL) analyses identify genetic markers associated with the expression of a gene. Most up-to-date eQTL studies consider the connection between genetic variation and expression in a single tissue. Multi-tissue analyses have the potential to improve findings in a single tissue, and elucidate the genotypic basis of differences between tissues. In this article, we develop a hierarchical Bayesian model (MT-eQTL) for multi-tissue eQTL analysis. MT-eQTL explicitly captures patterns of variation in the presence or absence of eQTL, as well as the heterogeneity of effect sizes across tissues...
September 25, 2017: Biostatistics
https://www.readbyqxmd.com/read/29028865/clinical-ethics-in-the-context-of-deep-brain-stimulation-for-movement-disorders
#17
Cynthia S Kubu, Paul J Ford
Objective: Discuss common clinical ethical challenges encountered in working with patients who are candidates for deep brain stimulation (DBS) for the treatment of motor symptoms of Parkinson's disease (PD). Method: The relevant literature is reviewed and supplemented by descriptive, ethically challenging cases stemming from decades of combined experience working on DBS teams. We outline ethical arguments and provide pragmatic recommendations to assist neuropsychologists working in movement disorder teams...
September 25, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/29028855/benjamin-button-effect-recognizable-rejuvenation
#18
Heidi A Waldorf
<p>The "Benjamin Button" effect inspired by the popular motion picture, is used to describe the goal of achieving a clearly younger and more attractive, yet still natural appearance utilizing noninvasive and minimally invasive therapies and procedures. Due to high patient demand for enhancement and rejuvenation of the face and body with minimal downtime, there is an ever-increasing number of companies developing products and devices, variety of indications, and field of practitioners offering them. Each option, including topicals, injectables, and devices, promises near magical results...
June 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/29028838/sequentially-optimized-reconstruction-strategy-a-meta-strategy-for-perimetry-testing
#19
Şerife Seda Kucur, Raphael Sznitman
Perimetry testing is an automated method to measure visual function and is heavily used for diagnosing ophthalmic and neurological conditions. Its working principle is to sequentially query a subject about perceived light using different brightness levels at different visual field locations. At a given location, this query-patient-feedback process is expected to converge at a perceived sensitivity, such that a shown stimulus intensity is observed and reported 50% of the time. Given this inherently time-intensive and noisy process, fast testing strategies are necessary in order to measure existing regions more effectively and reliably...
2017: PloS One
https://www.readbyqxmd.com/read/29028687/hyperreflective-deposition-in-the-background-of-advanced-stargardt-disease
#20
Lyam Ciccone, Winston Lee, Jana Zernant, Koji Tanaka, Kaspar Schuerch, Stephen H Tsang, Rando Allikmets
PURPOSE: To describe an unusual manifestation of hyperreflective deposits in the subretinal space in a group of patients with clinically and genetically confirmed Stargardt disease. METHODS: Retrospective review of color fundus, autofluorescence, infrared reflectance, red-free images, and spectral domain optical coherence tomography in 296 clinically diagnosed and genetically confirmed (2 expected disease-causing mutations in ABCA4) patients with Stargardt disease...
October 12, 2017: Retina
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