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https://www.readbyqxmd.com/read/29787037/effects-of-perinatal-exposure-to-dibutyltin-chloride-on-fat-and-glucose-metabolism-in-mice-and-molecular-mechanisms-in-vitro
#1
Raquel Chamorro-García, Bassem M Shoucri, Sigal Willner, Heidi Käch, Amanda Janesick, Bruce Blumberg
BACKGROUND: The organotin dibutyltin (DBT) is used in the manufacture of polyvinyl chloride (PVC) plastics, in construction materials, and in medical devices. Previous animal studies showed detrimental effects of DBT during in utero development at relatively high doses, but little was known about the effects of DBT exposure at environmentally relevant doses on endpoints such as obesity and metabolic disease. OBJECTIVES: We tested the potential obesogenic effects of DBT using in vitro and in vivo models...
May 2018: Environmental Health Perspectives
https://www.readbyqxmd.com/read/29787036/reflections-of-a-black-african-insider-researcher
#2
Isaac Tuffour
BACKGROUND: There is a growing body of literature providing reflective accounts and critical examination of the challenges faced by insider researchers. However, there is little research about the specific challenges that black African insider nurse researchers face. AIM: To reflect on the complexities black African insider nurse researchers face in the context of research sites, participants and the interpretation of data. DISCUSSION: Insider researchers are susceptible to various entanglements and dilemmas...
May 22, 2018: Nurse Researcher
https://www.readbyqxmd.com/read/29786975/a-comparison-of-one-stage-vs-two-stage-individual-patient-data-meta-analysis-methods-a-simulation-study
#3
Evangelos Kontopantelis
BACKGROUND: Individual patient data (IPD) meta-analysis allows for the exploration of heterogeneity and can identify subgroups that most benefit from an intervention (or exposure), much more successfully than meta-analysis of aggregate data. One-stage or two-stage IPD meta-analysis is possible, with the former using mixed-effects regression models and the latter obtaining study-estimates through simpler regression models before aggregating using standard meta-analysis methodology. However, a comprehensive comparison of the two methods, in practice, is lacking...
May 22, 2018: Research Synthesis Methods
https://www.readbyqxmd.com/read/29786974/embryonic-exposure-to-environmentally-relevant-concentrations-of-a-brominated-flame-retardant-reduces-the-size-of-song-control-nuclei-in-a-songbird
#4
Margaret L Eng, Viktoria Winter, John E Elliott, Scott A MacDougall-Shackleton, Tony D Williams
Environmental contaminants have the potential to act as developmental stressors and impair development of song and the brain of songbirds, but they have been largely unstudied in this context. 2,2',4,4',5-Pentabromodiphenyl ether (BDE-99) is a brominated flame retardant congener that has demonstrated endocrine disrupting effects, and has pervaded the global environment. We assessed the effects of in ovo exposure to environmentally relevant levels of BDE-99 on the neuroanatomy of the song-control system in a model songbird species, the zebra finch (Taeniopygia guttata)...
May 22, 2018: Developmental Neurobiology
https://www.readbyqxmd.com/read/29786971/intergenerational-teen-pregnancy-a-population-based-cohort-study
#5
Ning Liu, Simone N Vigod, M Michèle Farrugia, Marcelo L Urquia, Joel G Ray
OBJECTIVE: To estimate the intergenerational association in teenage pregnancy, and whether there is a coupling tendency between a mother and daughter in how their teen pregnancies end, such as an induced abortion (IA) vs. a livebirth. DESIGN: Population-based cohort study. SETTING: Ontario, Canada. POPULATION: 15,097 mothers and their 16,177 daughters. METHODS: Generalized estimating equations generated adjusted odds ratios (aOR) of a daughter experiencing a teen pregnancy in relation to the number of teen pregnancies her mother had...
May 22, 2018: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29786970/density-functional-theory-calculations-revealing-metal-like-band-structures-for-ultrathin-ge-111-and-211-surface-layers
#6
Chih-Shan Tan, Michael Hsuan-Yi Huang
To find out if germanium should also possess facet-dependent electrical conductivity properties, surface state density functional theory (DFT) calculations were performed on 1-6 layers of Ge (100), (110), (111), and (211) planes. Tunable Ge (100) and (110) planes always present the same semiconducting band structure with a band gap of 0.67 eV expected of bulk germanium. In contrast, 1, 2, 4, and 5 layers of Ge (111) and (211) plane models show metal-like band structures with continuous density of states (DOS) throughout the entire band...
May 21, 2018: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/29786960/the-atomic-resolution-structure-of-a-class-c-%C3%AE-lactamase-and-of-its-complex-with-avibactam
#7
Stefano Mangani, Cecilia Pozzi, Flavio Di Pisa, Filomena De Luca, Manuela Benvenuti, Jean-Denis Docquier
β-lactamases (BLs) are important antibiotic resistance determinants that significantly compromise the efficacy of valuable β-lactam antibacterial drugs. For that reason, combinations with β-lactamase inhibitor were developed. Avibactam is the first non-β-lactam BL inhibitor introduced in clinical practice. Ceftazidime-avibactam represents one of the few last-resort antibiotics available for the treatment of infections caused by near pandrug-resistant bacteria. TRU-1 is a chromosomally-encoded AmpC-type BL of Aeromonas enteropelogenes, related to the FOX-type BLs and constitutes a good model for class C BLs...
May 22, 2018: ChemMedChem
https://www.readbyqxmd.com/read/29786959/assessment-of-the-drug-interaction-potential-of-ertugliflozin-with-sitagliptin-metformin-glimepiride-or-simvastatin-in-healthy-subjects
#8
Vikas Kumar Dawra, David L Cutler, Susan Zhou, Rajesh Krishna, Haihong Shi, Yali Liang, Christine Alvey, Anne Hickman, Didier Saur, Steven G Terra, Vaishali Sahasrabudhe
Ertugliflozin, a sodium-glucose cotransporter 2 inhibitor for the treatment of adults with type 2 diabetes mellitus, is expected to be coadministered with sitagliptin, metformin, glimepiride, and/or simvastatin. Four separate open-label, randomized, single-dose, crossover studies were conducted in healthy adults to assess the potential pharmacokinetic interactions between ertugliflozin 15 mg and sitagliptin 100 mg (n = 12), metformin 1000 mg (n = 18), glimepiride 1 mg (n = 18), or simvastatin 40 mg (n = 18)...
May 22, 2018: Clinical Pharmacology in Drug Development
https://www.readbyqxmd.com/read/29786956/rho-kinase-and-protein-kinase-c-pathways-are-responsible-for-enhanced-carbachol-contraction-in-permeabilized-detrusor-in-a-rat-model-of-cystitis
#9
Merve Denizalti, N Tugba Durlu-Kandilci, G Simsek, T Emrah Bozkurt, Inci Sahin-Erdemli
Interstitial cystitis is a syndrome characterized by detrusor overactivity and chronic inflammation of the bladder. The mechanisms responsible for the altered smooth muscle contractility remain poorly understood. The aim of the study was to investigate the role of intracellular signalling pathways in carbachol-induced detrusor contraction in a rat model of interstitial cystitis. Cyclophosphamide (150 mg/kg, dissolved in saline) was injected to rats (Sprague-Dawley, female, 200-250 g) intraperitoneally once a day on days 1, 4 and 7 to induce interstitial cystitis...
May 22, 2018: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29786949/the-qsofa-score-a-simple-and-accurate-predictor-of-outcomes-in-patients-with-glyphosate-herbicide-poisoning
#10
Yongsoo Cho, Byeongjo Chun, Jeongmi Moon
This study aimed to investigate whether the quick Sequential Organ Failure Assessment (qSOFA) score at emergency department (ED) presentation can help improve the risk assessment of glyphosate-surfactant herbicide (GlySH) poisoning complications. A total of 150 patients presenting with acute glyphosate herbicide ingestion were enrolled in this retrospective observational study. The qSOFA scores at presentation, ΔqSOFA (calculated by subtracting the worst qSOFA score from 1 hr after admission from the qSOFA score at presentation), baseline characteristics, clinical courses and outcomes were collected and analysed...
May 22, 2018: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29786943/integrating-a-comprehensive-dna-barcode-reference-library-with-a-global-map-of-yews-taxus-l-for-forensic-identification
#11
Jie Liu, Richard I Milne, Michael Möller, Guang-Fu Zhu, Lin-Jiang Ye, Ya-Huang Luo, Jun-Bo Yang, Moses Cheloti Wambulwa, Chun-Neng Wang, De-Zhu Li, Lian-Ming Gao
Rapid and accurate identification of endangered species is a critical component of bio-surveillance and conservation management, and potentially policing illegal trades. However, this is often not possible using traditional taxonomy, especially where only small or pre-processed parts of plants are available. Reliable identification can be achieved via a comprehensive DNA barcode reference library, accompanied by precise distribution data. However, these require extensive sampling at spatial and taxonomic scales, which has rarely been achieved for cosmopolitan taxa...
May 22, 2018: Molecular Ecology Resources
https://www.readbyqxmd.com/read/29786931/real-time-monitoring-of-prodrug-activation-by-direct-mode-of-chemiluminescence
#12
Doron Shabat, Samer Gnaim, Anna Scomparin, Sayantan Das, Ronit Satchi-Fainaro
The majority of theranostic prodrugs reported so far relay information through a fluorogenic response generated upon release of the active chemotherapeutic agent. A chemiluminescence detection mode offers significant advantages over fluorescence, mainly due to the superior signal-to-noise ratio of chemiluminescence. Here we report the design and synthesis of the first theranostic prodrug monitored by a chemiluminescence diagnostic mode. As a representative model we prepared a prodrug from the chemotherapeutic monomethyl auristatin E designed for activation by β-galactosidase...
May 22, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29786900/avian-demographic-responses-to-drought-and-fire-a-community-level-perspective
#13
James F Saracco, Stephen M Fettig, George L San Miguel, David W Mehlman, Steven K Albert
Drought stress is an important consideration for wildlife in arid and semi-arid regions under climate change. Drought can impact plant and animal populations directly, through effects on their physiology, as well as indirectly through effects on vegetation productivity and resource availability, and by creating conditions conducive to secondary disturbance, such as wildfire. We implemented a novel approach to understanding community-level demographic responses of birds and their habitats to these stressors in the context of climate change at 14 study sites in the Four Corners region of the southwestern United States...
May 22, 2018: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/29786878/dietary-omega-3-fatty-acids-differentially-impact-acute-ethanol-responsive-behaviors-and-ethanol-consumption-in-dba-2j-versus-c57bl-6j-mice
#14
Jennifer T Wolstenholme, M Scott Bowers, Alexander B Pais, A Christian Pais, Ryan S Poland, Justin L Poklis, Andrew G Davies, Jill C Bettinger
BACKGROUND: Complex interactions between environmental and genetic factors influence the risk for developing alcohol use disorder (AUD) in humans. To date, studies of the impact of environment on AUD risk have primarily focused on psychological characteristics or on the effects of developmental exposure to ethanol. We recently observed that modifying levels of the long-chain ω-3 (LC ω-3) fatty acid, eicosapentaenoic acid (EPA), alters acute physiological responses to ethanol in C. elegans...
May 22, 2018: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/29786877/morphomic-malnutrition-score-a-standardized-screening-tool-for-severe-malnutrition-in-adults
#15
Christopher Lee, Erica Raymond, Brian A Derstine, Joshua M Glazer, Rebecca Goulson, Avinash Rajasekaran, Jill Cherry-Bukowiec, Grace L Su, Stewart C Wang
BACKGROUND: Granular diagnostic criteria for adult malnutrition are lacking. OBJECTIVE: This study uses analytic morphomics to define the Morphomic Malnutrition Score (MMS), a robust screening tool for severe malnutrition. METHODS: The study population (n = 643) consisted of 2 cohorts: 1) 124 emergency department patients diagnosed with severe malnutrition by a registered dietitian (RD) and an available computed tomography (CT) scan within 2 days of RD evaluation, and 2) 519 adult kidney donor candidates to represent a healthy cohort...
May 22, 2018: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29786874/meta-analysis-of-the-association-of-alcohol-related-social-media-use-with-alcohol-consumption-and-alcohol-related-problems-in-adolescents-and-young-adults
#16
REVIEW
Brenda L Curtis, Samantha J Lookatch, Danielle E Ramo, James R McKay, Richard S Feinn, Henry R Kranzler
Despite the pervasive use of social media by young adults, there is comparatively little known about whether, and how, engagement in social media influences this group's drinking patterns and risk of alcohol-related problems. We examined the relations between young adults' alcohol-related social media engagement (defined as the posting, liking, commenting, and viewing of alcohol-related social media content) and their drinking behavior and problems. We conducted a systematic review and meta-analysis of studies evaluating the association of alcohol consumption and alcohol-related problems with alcohol-related social media engagement...
May 22, 2018: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/29786873/in-vivo-profiling-of-four-centrally-administered-opioids-for-antinociception-constipation-and-respiratory-depression-between-colony-differences-in-sprague-dawley-rats
#17
A Kuo, M T Smith
Outbred rodent stocks including Sprague Dawley rats, are known for their genetic diversity and so they are often used to develop animal models of human disease. Although between-colony differences in pharmaco-behavioural studies have been published previously, a direct head-to-head comparison study, whereby all research was performed in the same laboratory by the same experimenter utilising the supraspinal route of drug administration in the same strain of rat, is lacking. Herein, we report our head-to-head comparison study, involving assessment of antinociception, constipation and respiratory depression evoked by single bolus intracerebroventricular (ICV) doses of morphine, buprenorphine, DPDPE and U69,593 using male Sprague Dawley rats sourced from a different breeding colony (BC2) from that (BC1) used by us previously...
May 22, 2018: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29786867/growth-hormone-releasing-hormone-antagonists-reduce-prostatic-enlargement-and-inflammation-in-carrageenan-induced-chronic-prostatitis
#18
Petra Popovics, Renzhi Cai, Wei Sha, Ferenc G Rick, Andrew V Schally
BACKGROUND: Inflammation plays a key role in the etiology of benign prostatic hyperplasia (BPH) through multiple pathways involving the stimulation of proliferation by cytokines and growth factors as well as the induction of the focal occurrence of epithelial-to-mesenchymal transition (EMT). We have previously reported that GHRH acts as a prostatic growth factor in experimental BPH and in autoimmune prostatitis models and its blockade with GHRH antagonists offer therapeutic approaches for these conditions...
May 21, 2018: Prostate
https://www.readbyqxmd.com/read/29786861/temporally-feathered-intensity-modulated-radiation-therapy-a-planning-technique-to-reduce-normal-tissue-toxicity
#19
Juan Carlos López Alfonso, Shireen Parsai, Nikhil Joshi, Andrew Godley, Chirag Shah, Shlomo A Koyfman, Jimmy J Caudell, Clifton D Fuller, Heiko Enderling, Jacob G Scott
PURPOSE: Intensity modulated radiation therapy (IMRT) has allowed optimization of three-dimensional spatial radiation dose distributions permitting target coverage while reducing normal tissue toxicity. However, radiation-induced normal tissue toxicity is a major contributor to patients' quality of life and often a dose-limiting factor in the definitive treatment of cancer with radiation therapy. We propose the next logical step in the evolution of IMRT using canonical radiobiological principles, optimizing the temporal dimension through which radiation therapy is delivered to further reduce radiation-induced toxicity by increased time for normal tissue recovery...
May 22, 2018: Medical Physics
https://www.readbyqxmd.com/read/29786859/synergistic-effects-of-abiotic-stresses-in-plants-a-case-study-of-nitrogen-limitation-and-saturating-light-intensity-in-arabidopsis-thaliana
#20
Itay Cohen, Tal Rapaport, Vered Chalifa-Caspi, Shimon Rachmilevitch
Under natural conditions, plants are regularly exposed to combinations of stress factors. A common example is the conjunction between nitrogen (N) deficiency and excess light. The combined effect of stress factors is often ignored in studies using controlled conditions, possibly resulting in misleading conclusions. To address this issue, the current study examined the physiological behavior of Arabidopsis thaliana under the effect of varying nitrogen levels and light intensities. The joint influence of low N and excess light had an adverse effect on plant growth, chlorophyll and anthocyanin concentrations, photochemical capacity, and the abundance of proteins involved in carbon assimilation and anti-oxidative metabolism...
May 22, 2018: Physiologia Plantarum
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