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https://www.readbyqxmd.com/read/28445851/development-and-validation-of-a-uhplc-esi-ms-ms-method-for-the-simultaneous-quantification-of-mammal-lysophosphatidylcholines-and-lysophosphatidylethanolamines-in-serum
#1
Susana Suárez-García, Lluís Arola, Aïda Pascual-Serrano, Anna Arola-Arnal, Gerard Aragonès, Cinta Bladé, Manuel Suárez
Recent investigations based on non-targeted metabolomics have proposed lysophospholipids (Lyso-PLs) as biomarkers of different diseases. In particular, lysophosphatidylcholines (Lyso-PCs) and lysophosphatidylethanolamines (Lyso-PEs) have been associated with serious lipid pathologies. Methods to determine the different molecular species in a biological sample and to quantify even less abundant species are required for the evaluation of the Lyso-PL pattern as a novel comprehensive biomarker of dyslipidemia. This study describes the development and validation of an ultra-high-performance liquid chromatography coupled to tandem mass spectrometry assay for the determination of a large number of Lyso-PCs and Lyso-PEs in biological samples...
April 18, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28445779/the-acute-cardiorespiratory-effects-of-centrally-injected-arachidonic-acid-the-mediation-of-prostaglandin-e-d-and-f2%C3%AE
#2
Leman Gizem Erkan, Burcin Altinbas, Gokcen Guvenc, Begum Aydin, Nasir Niaz, Murat Yalcin
Arachidonic acid (AA), which is released from synaptic membrane phospholipid by neuroreceptor-initiated activation of phospholipase A2, is abundant in the brain and works as a neurotransmitter and/or neuromodulator in the central nervous system. Recently we reported that centrally injected AA generated pressor and hyperventilation effects by activating thromboxane A2 (TXA2) signaling pathway. The present study was designed to investigate the mediation of other metabolites of AA such as prostaglandin (PG) D, PGE and PGF2α alongside TXA2 in the AA-evoked cardiorespiratory effects in anaesthetized rats...
April 23, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28445563/outbreak-of-occupational-dermatitis-associated-with-pyemotes-ventricosus
#3
Martyna Tomczyk-Socha, Katarzyna Jedrzejewska-Jurga, Joanna Limburska, Jaroslaw Tomczyk
Importance: Although Pyemotes spp have been known to cause dermatitis, recent reports are rare. During the past 30 years, only 3 outbreaks of dermatitis caused by Pyemotes ventricosus have been reported. Objective: To analyze the causative agent of skin changes in employees of a company that produced herbal medicines. Design, Setting, and Participants: This case series includes 18 patients (8 men, 10 women; mean age, 44 years) who contracted unusual dermatitis after an occupational exposure in July and August of 2012 while working for a company that produced herbal medicines...
April 26, 2017: JAMA Dermatology
https://www.readbyqxmd.com/read/28445549/impact-of-the-c-mybe308g-mutation-on-mouse-myelopoiesis-and-dendritic-cell-development
#4
Peter Papathanasiou, Sawang Petvises, Ying-Ying Hey, Andrew C Perkins, Helen C O'Neill
Booreana mice carrying the c-Myb308G point mutation were analyzed to determine changes in early hematopoiesis in the bone marrow and among mature cells in the periphery. This point mutation led to increased numbers of early hematopoietic stem and progenitor cells (HSPCs), with a subsequent reduction in the development of B cells, erythroid cells, and neutrophils, and increased numbers of myeloid cells and granulocytes. Myelopoiesis was further investigated by way of particular subsets affected. A specific question addressed whether booreana mice contained increased numbers of dendritic-like cells (L-DC subset) recently identified in the spleen, since L-DCs arise in vitro by direct differentiation from HSPCs co-cultured over splenic stroma...
2017: PloS One
https://www.readbyqxmd.com/read/28445534/a-new-high-resolution-global-mass-coral-bleaching-database
#5
Simon D Donner, Gregory J M Rickbeil, Scott F Heron
Episodes of mass coral bleaching have been reported in recent decades and have raised concerns about the future of coral reefs on a warming planet. Despite the efforts to enhance and coordinate coral reef monitoring within and across countries, our knowledge of the geographic extent of mass coral bleaching over the past few decades is incomplete. Existing databases, like ReefBase, are limited by the voluntary nature of contributions, geographical biases in data collection, and the variations in the spatial scale of bleaching reports...
2017: PloS One
https://www.readbyqxmd.com/read/28445517/motivation-factors-for-suicidal-behavior-and-their-clinical-relevance-in-admitted-psychiatric-patients
#6
Naoki Hayashi, Miyabi Igarashi, Atsushi Imai, Yuka Yoshizawa, Kaori Asamura, Yoichi Ishikawa, Taro Tokunaga, Kayo Ishimoto, Yoshitaka Tatebayashi, Hirohiko Harima, Naoki Kumagai, Hidetoki Ishii, Yuji Okazaki
BACKGROUND: Suicidal behavior (SB) is a major, worldwide health concern. To date there is limited understanding of the associated motivational aspects which accompany this self-initiated conduct. AIMS: To develop a method for identifying motivational features associated with SB by studying admitted psychiatric patients, and to examine their clinical relevance. METHODS: By performing a factor analytic study using data obtained from a patient sample exhibiting high suicidality and a variety of SB methods, Motivations for SB Scale (MSBS) was constructed to measure the features...
2017: PloS One
https://www.readbyqxmd.com/read/28445509/functional-genetic-variants-within-the-sirt2-gene-promoter-in-acute-myocardial-infarction
#7
Wentao Yang, Feng Gao, Pei Zhang, Shuchao Pang, Yinghua Cui, Lixin Liu, Guanghe Wei, Bo Yan
Coronary artery disease (CAD), including acute myocardial infarction (AMI) is the complication of atherosclerosis. Recently, genome-wide association studies have identified a large number of CAD-related genetic variants. However, only 10% of CAD cases could be explained. Low frequent and rare genetic variants have been recently proposed to be main causes for CAD. SIRT2 is a member of sirtuin family, NAD(+)-dependent class III deacetylases. SIRT2 is involved in genomic stability, metabolism, inflammation, oxidative stress and autophagy, as well as in platelet function...
2017: PloS One
https://www.readbyqxmd.com/read/28445499/fine-scale-population-genetic-structure-of-the-bengal-tiger-panthera-tigris-tigris-in-a-human-dominated-western-terai-arc-landscape-india
#8
Sujeet Kumar Singh, Jouni Aspi, Laura Kvist, Reeta Sharma, Puneet Pandey, Sudhanshu Mishra, Randeep Singh, Manoj Agrawal, Surendra Prakash Goyal
Despite massive global conservation strategies, tiger populations continued to decline until recently, mainly due to habitat loss, human-animal conflicts, and poaching. These factors are known to affect the genetic characteristics of tiger populations and decrease local effective population sizes. The Terai Arc Landscape (TAL) at the foothills of the Himalaya is one of the 42 source sites of tigers around the globe. Therefore, information on how landscape features and anthropogenic factors affect the fine-scale spatial genetic structure and variation of tigers in TAL is needed to develop proper management strategies for achieving long-term conservation goals...
2017: PloS One
https://www.readbyqxmd.com/read/28445427/small-rna-pathways-that-protect-the-somatic-genome
#9
REVIEW
Seogang Hyun
Transposable elements (TEs) are DNA elements that can change their position within the genome, with the potential to create mutations and destabilize the genome. As such, special molecular systems have been adopted in animals to control TE activity in order to protect the genome. PIWI proteins, in collaboration with PIWI-interacting RNAs (piRNAs), are well known to play a critical role in silencing germline TEs. Although initially thought to be germline-specific, the role of PIWI-piRNA pathways in controlling TEs in somatic cells has recently begun to be explored in various organisms, together with the role of endogenous small interfering RNAs (endo-siRNAs)...
April 26, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28445237/effects-of-polymyxin-b-hemoperfusion-on-mortality-in-patients-with-severe-sepsis-and-septic-shock-a-systemic-review-meta-analysis-update-and-disease-severity-subgroup-meta-analysis
#10
Tzu Chang, Yu-Kang Tu, Chen-Tse Lee, Anne Chao, Chi-Hsiang Huang, Ming-Jiuh Wang, Yu-Chang Yeh
OBJECTIVE: Several studies have reported a survival benefit for polymyxin B hemoperfusion treatment in patients with severe sepsis and septic shock. However, recently, a propensity-matched analysis and a randomized controlled trial reported no survival benefit for polymyxin B hemoperfusion treatment. We performed an up-to-date meta-analysis to determine the effect of polymyxin B hemoperfusion treatment on mortality in patients with severe sepsis and septic shock. DATA SOURCES: PubMed, Embase, and Cochrane Library were searched from inception to May 2016...
April 25, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28445235/recent-trends-in-the-epidemiology-of-hepatocellular-carcinoma-in-olmsted-county-minnesota-a-us-population-based-study
#11
Ju Dong Yang, Hager Ahmed Mohammed, William S Harmsen, Felicity Enders, Gregory J Gores, Lewis R Roberts
BACKGROUND/AIM: The epidemiology of hepatocellular carcinoma (HCC) has changed in the United States recently. The aim of this study is to evaluate the recent trends of HCC epidemiology in Olmsted County, MN. METHODS: Residents aged over 20 with newly diagnosed HCC were identified using the Rochester Epidemiology Project database. Clinical information was compared among patients diagnosed between 2000 and 2009 (era 1) and 2010 to 2014 (era 2). RESULTS: Over 1...
April 25, 2017: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/28445218/a-study-of-pediatricians-debt-repayment-a-decade-after-completing-residency
#12
William L Cull, Shesha K Katakam, Amy Jost Starmer, Elizabeth A Gottschlich, Ashley A Miller, Mary Pat Frintner
PURPOSE: Pediatricians' education debt has been increasing. Less is known about the pace of their debt repayment. The authors examined patterns of debt repayment for pediatricians who completed residency from 2002-2004. METHOD: The authors analyzed weighted 2013 survey data from the American Academy of Pediatrics Pediatrician Life and Career Experience Study. They categorized participants based on education debt level at residency completion ($0; $1-$49,999; $50,000-$99,999; $100,000-$149,999; ≥ $150,000) and explored debt repayment and well-being by starting debt group using multivariable logistic regression...
April 25, 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/28445214/teaching-the-social-determinants-of-health-a-path-to-equity-or-a-road-to-nowhere
#13
Malika Sharma, Andrew D Pinto, Arno K Kumagai
Medical schools are increasingly called to include social responsibility in their mandates. As such, they are focusing their attention on the social determinants of health (SDOH) as key drivers in the health of the patients and communities they serve. However, underlying this emphasis on SDOH is the assumption that teaching medical students about SDOH will lead future physicians to take action to help achieve health equity. There is little evidence to support this belief. In many ways, the current approach to SDOH within medical education positions the SDOH as "facts to be known" rather than as "conditions to be challenged and changed...
April 25, 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/28445193/a-pilot-randomized-trial-on-safety-and-efficacy-of-a-novel-topical-combined-inhibitor-of-janus-kinase-1-3-and-spleen-tyrosine-kinase-for-gvhd-associated-ocular-surface-disease
#14
Ahmad Kheirkhah, Antonio Di Zazzo, Vannarut Satitpitakul, Merle Fernandez, Daniel Magilavy, Reza Dana
PURPOSE: Janus kinase (JAK) and spleen tyrosine kinase (SYK) play critical functions in T-cell activation and in inflammation. Because of their antiinflammatory effects, JAK and SYK inhibitors have recently been evaluated in several immunopathogenic disorders. This pilot study was designed to assess the safety and efficacy of a topical combined JAK/SYK inhibitor, R348, ophthalmic solution for treatment of ocular surface disease in graft-versus-host disease (GVHD). METHODS: This phase 2, double-masked, randomized, pilot trial included 30 patients with ocular surface disease due to GVHD who were randomized to receive topical 0...
April 25, 2017: Cornea
https://www.readbyqxmd.com/read/28444901/pge2-receptor-subtype-1-ep1-regulates-mesenchymal-stromal-cell-osteogenic-differentiation-by-modulating-cellular-energy-metabolism
#15
M Feigenson, R A Eliseev, J H Jonason, B N Mills, R J O'Keefe
Mesenchymal stromal cells (MSCs) are multipotent progenitors capable of differentiation into osteoblasts and can potentially serve as a source for cell-based therapies for bone repair. Many factors have been shown to regulate MSC differentiation into the osteogenic lineage such as the Cyclooxygenase-2 (COX2)/Prostaglandin E2 (PGE2) signaling pathway that is critical for bone repair. PGE2 binds four different receptors EP1-4. While most studies focus on the role PGE2 receptors EP2 and EP4 in MSC differentiation, our study focuses on the less studied, receptor subtype 1 (EP1) in MSC function...
April 26, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28444888/bacteriophge-exclusion-brex-a-novel-anti-phage-mechanism-in-the-arsenal-of-bacterial-defense-system
#16
Kulbhushan Chaudhary
The arm race between bacteria and phages leads to the development of many phage resistance mechanisms. Bacteria are perpetually changing their strategy to avert phage infection and killing. Recently, a study published that shed light on a novel bacterial defense system called bacteriophge exclusion (BREX). BREX system is a six-gene cassette in Bacillus cereus which provides complete phage resistance to a broad range of phages, including lytic and temperate ones. It's a novel defense strategy which involves DNA methylation of the host cell and block phage DNA replication...
April 26, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28444818/reduced-community-viral-load-does-not-coincide-with-a-reduction-in-the-rate-of-new-hiv-diagnoses-and-recent-infections-data-from-a-region-of-southern-italy
#17
L Monno, A Saracino, L Scudeller, C Santoro, G Brindicci, G Punzi, A Lagioia, S Lo Caputo, G Angarano
OBJECTIVES: We assessed whether changes in community viral load (CVL) over time were associated with the rate of new HIV diagnoses (NDs). METHODS: HIV-1-positive individuals referred to our institute and permanently residing in our province were considered for inclusion in the study. A total of 861 HIV-infected adults with at least one HIV RNA measurement (12 530 measurements in total) between 2008 and 2014 were included. Viraemia copy-years were calculated from all HIV RNA values for each patient using the trapezoidal rule; multiple CVL indicators were considered...
April 26, 2017: HIV Medicine
https://www.readbyqxmd.com/read/28444737/digest-know-your-poison-predictable-molecular-changes-confer-toxin-resistance-in-snakes
#18
Kalina T J Davies
The repeated independent evolution of similar features in divergent lineages, a process known as convergent evolution, has long been a source of fascination for both naturalists and evolutionary biologists. Until recently, this active area of research had been focused principally on the evolution of physical characteristics associated with novel traits (e.g. the independent evolution of wings in birds, bats and pterosaurs). This article is protected by copyright. All rights reserved.
April 26, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28444697/population-pharmacokinetics-of-dexmedetomidine-in-infants
#19
Rachel G Greenberg, Huali Wu, Matthew Laughon, Edmund Capparelli, Stevie Rowe, Kanecia O Zimmerman, P Brian Smith, Michael Cohen-Wolkowiez
Despite limited pharmacokinetic (PK) data, dexmedetomidine is increasingly being used off-label for sedation in infants. We aimed to characterize the developmental PK changes of dexmedetomidine during infancy. In this open-label, single-center PK study of dexmedetomidine in infants receiving dexmedetomidine per clinical care, ≤10 blood samples per infant were collected. A set of structural PK models and residual error models were explored using nonlinear mixed-effects modeling in NONMEM. Covariates including postmenstrual age (PMA), serum creatinine, and recent history of cardiac surgery requiring cardiopulmonary bypass were investigated for their influence on PK parameters...
April 25, 2017: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28444638/nuclear-cardiology-are-we-using-the-right-protocols-and-tracers-the-right-way
#20
REVIEW
Maurizio Dondi, Thomas Pascual, Diana Paez, Andrew J Einstein
The field of nuclear cardiology has changed considerably over recent years, with greater attention paid to safety and radiation protection issues. The wider usage of technetium-99m (Tc-99m)-labeled radiopharmaceuticals for single-photon emission computed tomography (SPECT) imaging using gamma cameras has contributed to better quality studies and lower radiation exposure to patients. Increased availability of tracers and scanners for positron emission tomography (PET) will help further improve the quality of studies and quantify myocardial blood flow and myocardial flow reserve, thus enhancing the contribution of non-invasive imaging to the management of coronary artery disease...
April 25, 2017: American Journal of Cardiovascular Drugs: Drugs, Devices, and Other Interventions
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