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https://www.readbyqxmd.com/read/29679786/simultaneous-analysis-of-historical-emerging-and-novel-brominated-flame-retardants-in-food-and-feed-using-a-common-extraction-and-purification-method
#1
Emmanuelle Bichon, Ingrid Guiffard, Anaïs Vénisseau, Elodie Lesquin, Vincent Vaccher, Philippe Marchand, Bruno Le Bizec
Brominated Flame Retardants (BFRs) are still widely used for industrial purposes. These contaminants may enter the food chain where they mainly occur in food of animal origin. The aim of our work was to provide a unique method able to quantify the widest range of BFRs in feed and food items. After freeze-drying and grinding, a pressurized liquid extraction was carried out. The extract was purified on acidified silica, Florisil® and carbon columns, the four separated fractions were analyzed by gas and liquid chromatography coupled to high resolution and tandem mass spectrometry...
April 13, 2018: Chemosphere
https://www.readbyqxmd.com/read/29679782/outcomes-after-off-label-use-of-the-pipeline-embolization-device-for-intracranial-aneurysms-a-multicenter-cohort-study
#2
S G Zammar, T J Buell, C J Chen, R W Crowley, D Ding, C J Griessenauer, B L Hoh, K C Liu, C S Ogilvy, Raper, A Singla, A J Thomas, K M Cockroft, S D Simon
OBJECTIVES: The aim of this retrospective multicenter cohort study is to examine the outcomes of the Pipeline embolization device (PED) for the treatment of intracranial aneurysms outside of United States Food and Drug Administration approved (off-label) indications. METHODS: Data from aneurysm patients treated with the PED for off-label indications was pooled from four different centers. The primary endpoints were decline in modified Rankin Scale (mRS) by at least 1 point and angiographic aneurysm occlusion at follow-up...
April 18, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29679669/n-acetylcysteine-protects-against-chorioretinal-damage-induced-by-photodynamic-therapy-for-experimental-choroidal-neovascularization-in-a-rat-model
#3
Tae Wan Kim, Jun Woong Moon, Hyeong Gon Yu
We explored the protective effects of N -acetylcysteine (NAC) on chorioretinal damage induced by photodynamic therapy (PDT) in an experimental rat model of choroidal neovascularization (CNV). METHODS: Experimental CNV was induced by an argon laser in 24 Brown Norway rats 7 days prior to PDT. Commencing 1 day after CNV induction, 0.5 mL of NAC was orally administered daily to the NAC+ group (12 rats), and 0.5 mL of normal saline to the NAC- group (12 rats). Diode laser treatment was delivered for 42 s (total energy, 25 J/cm2) to the left eye prior to verteporfin infusion (PDT-) and to the right eye 15-20 min after such infusion (PDT+)...
April 18, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29679646/chronic-methamphetamine-exposure-attenuates-neural-activation-in-hypothalamic-pituitary-adrenal-axis-associated-brain-regions-in-a-sex-specific-manner
#4
Jason S Jacobskind, Zachary J Rosinger, Tiffany Gonzalez, Kristen L Zuloaga, Damian G Zuloaga
Sex differences in methamphetamine (MA) abuse and consequences of MA have been reported with females showing an increased addiction phenotype and withdrawal symptoms. One mechanism through which these effects might occur is via sex-specific alterations in the hypothalamic-pituitary-adrenal (HPA) axis and its associated brain regions. In this study, mice were administered MA (5 mg/kg) or saline for 10 consecutive days. During early withdrawal, anxiety-like behaviors were assessed in the open field, light/dark box, and elevated plus maze...
April 18, 2018: Neuroscience
https://www.readbyqxmd.com/read/29679560/developmental-origin-and-morphogenesis-of-the-diaphragm-an-essential-mammalian-muscle
#5
Elizabeth M Sefton, Mirialys Gallardo, Gabrielle Kardon
The diaphragm is a mammalian skeletal muscle essential for respiration and for separating the thoracic and abdominal cavities. Development of the diaphragm requires the coordinated development of muscle, muscle connective tissue, tendon, nerves, and vasculature that derive from different embryonic sources. However, defects in diaphragm development are common and the cause of an often deadly birth defect, Congenital Diaphragmatic Hernia (CDH). Here we comprehensively describe the normal developmental origin and complex spatial-temporal relationship between the different developing tissues to form a functional diaphragm using a developmental series of mouse embryos genetically and immunofluorescently labeled and analyzed in whole mount...
April 18, 2018: Developmental Biology
https://www.readbyqxmd.com/read/29679486/tblpn-a-key-enzyme-in-lipid-droplet-formation-and-phospholipid-metabolism-is-essential-for-mitochondrial-integrity-and-growth-of-trypanosoma-brucei
#6
Ladan Dawoody Nejad, Mauro Serricchio, Jennifer Jelk, Andrew Hemphill, Peter Bütikofer
Mammalian phosphatidic acid phosphatases, also called lipins, show high amino acid sequence identity to Saccharomyces cerevisiae Pah1p and catalyze the dephosphorylation of phosphatidic acid (PA) to diacylglycerol. Both the substrate and product of the reaction are key precursors for the synthesis of phospholipids and triacylglycerol (TAG). We now show that expression of the Trypanosoma brucei lipin homolog TbLpn is essential for parasite survival in culture. Inducible down-regulation of TbLpn in T. brucei procyclic forms increased cellular PA content, decreased the numbers of lipid droplets, reduced TAG steady-state levels and inhibited in vivo [3 H]TAG formation after labeling trypanosomes with [3 H]glycerol...
April 21, 2018: Molecular Microbiology
https://www.readbyqxmd.com/read/29679453/simultaneous-analysis-of-multiple-urinary-biomarkers-for-the-evaluation-of-oxidative-stress-by-automated-on-line-in-tube-solid-phase-microextraction-coupled-with-negative-positive-ion-switching-mode-lc-ms-ms
#7
Akihiro Saito, Mariko Hamano, Hiroyuki Kataoka
This study described an automated on-line method for the simultaneous determination of 8-isoprostane, 8-hydroxy-2'-deoxyguanosine, and 3-nitro-l-tyrosine in human urine. The method involves in-tube solid-phase microextraction using a Carboxen 1006 PLOT capillary column as an extraction device, followed by liquid chromatography with tandem mass spectrometry using a CX column and detection in the negative/positive switching ion-mode by multiple reaction monitoring. Using their stable isotope-labeled internal standards, each of these oxidative stress biomarkers showed good linearity from 0...
April 20, 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/29679420/a-dual-label-time-resolved-fluorescence-immunoassay-for-the-simultaneous-determination-of-carcino-embryonic-antigen-and-squamous-cell-carcinoma-antigen
#8
Qian Mao, Xiaohong Liu, Jingwen Ye, Huankun Liang, Binxian Li, Xinyi Sun, Lin Sun, Yuman Sun, Xiaomei Mu, Laiqing Li
Among women worldwide, cervical cancer is the second-most common cancer, and cervical smears and DNA detection have low sensitivity or are too expensive. The concentrations of carcino-embryonic antigen (CEA) and squamous cell carcinoma (SCC) in the serum were detected using a sandwich immunoassay. The CEA and SCC in the serum were captured by anti-CEA and anti-SCC antibodies. After combining other anti-CEA- and anti-SCC-labeled antibodies with europium (III) (Eu3+ ) and samarium (III) (Sm3+ ) chelates, CEA and SCC were detected with time-resolved fluorometry (TRF)...
April 20, 2018: Biotechnology and Applied Biochemistry
https://www.readbyqxmd.com/read/29679380/a-non-myeloablative-chimeric-mouse-model-accurately-defines-microglia-and-macrophage-contribution-in-glioma
#9
Kenny Yu, A Saam Youshani, Fiona L Wilkinson, Claire O'Leary, Peter Cook, Liisi Laaniste, Aiyin Liao, Dominic Mosses, Christopher Waugh, Hannah Shorrock, Omar Pathmanaban, Andrew Macdonald, Ian Kamaly-Asl, Federico Roncaroli, Brian W Bigger
AIMS: Resident and peripherally-derived glioma associated microglia/macrophages (GAMM) play a key role in driving tumour progression, angiogenesis, invasion, and attenuating host immune responses. Differentiating these cells' origins is challenging and current pre-clinical models such as irradiation-based adoptive transfer, parabiosis and transgenic mice have limitations. We aimed to develop a novel non-myeloablative transplantation (NMT) mouse model that permits high levels of peripheral chimerism without blood-brain barrier (BBB) damage or brain infiltration prior to tumour implantation...
April 20, 2018: Neuropathology and Applied Neurobiology
https://www.readbyqxmd.com/read/29679292/preparation-and-optimization-lipid-nanocapsules-to-enhance-the-antitumor-efficacy-of-cisplatin-in-hepatocellular-carcinoma-hepg2-cells
#10
Qingqing Zhai, Hailong Li, Yanlin Song, Ruijiao Wu, Chuanfang Tang, Xiaodong Ma, Zhihao Liu, Jinyong Peng, Jianbin Zhang, Zeyao Tang
This work aimed to develop and optimize several lipid nanocapsule formulations (LNCs) to encapsulate cisplatin (CDDP) for treatment of hepatocellular carcinoma. By comparing the effect of oil/surfactant ratio, lecithin content, and oil/surfactant type on LNC characteristics, two LNCs were selected as optimal formulations: HS15-LNC (Solutol HS 15/MCT/lecithin, 54.5:42.5:3%, w/w) and EL-LNC (Cremophor EL/MCT/lecithin, 54.5:42.5:3%, w/w). Both LNCs could effectively encapsulate CDDP with the encapsulation efficiency of 73...
April 20, 2018: AAPS PharmSciTech
https://www.readbyqxmd.com/read/29679214/improvement-of-radiology-reporting-in-a-clinical-cancer-network-impact-of-an-optimised-multidisciplinary-workflow
#11
A W Olthof, J Borstlap, W W Roeloffzen, P M C Callenbach, P M A van Ooijen
PURPOSE: To assess the effectiveness of implementing a quality improvement project in a clinical cancer network directed at the response assessment of oncology patients according to RECIST-criteria. METHODS: Requests and reports of computed tomography (CT) studies from before (n = 103) and after (n = 112) implementation of interventions were compared. The interventions consisted of: a multidisciplinary working agreement with a clearly described workflow; subspecialisation of radiologists; adaptation of the Picture Archiving and Communication System (PACS); structured reporting...
April 20, 2018: European Radiology
https://www.readbyqxmd.com/read/29679078/fluorophore-labeling-of-a-cell-penetrating-peptide-significantly-alters-the-mode-and-degree-of-biomembrane-interaction
#12
Sofie Fogh Hedegaard, Mohammed Sobhi Derbas, Tania Kjellerup Lind, Marina Robertnova Kasimova, Malene Vinther Christensen, Maria Høtoft Michaelsen, Richard A Campbell, Lene Jorgensen, Henrik Franzyk, Marité Cárdenas, Hanne Mørck Nielsen
The demand for highly efficient macromolecular drugs, used in the treatment of many severe diseases, is continuously increasing. However, the hydrophilic character and large molecular size of these drugs significantly limit their ability to permeate across cellular membranes and thus impede the drugs in reaching their target sites in the body. Cell-penetrating peptides (CPP) have gained attention as promising drug excipients, since they can facilitate drug permeation across cell membranes constituting a major biological barrier...
April 20, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29679077/proteome-wide-analysis-of-cysteine-oxidation-reveals-metabolic-sensitivity-to-redox-stress
#13
Jiska van der Reest, Sergio Lilla, Liang Zheng, Sara Zanivan, Eyal Gottlieb
Reactive oxygen species (ROS) are increasingly recognised as important signalling molecules through oxidation of protein cysteine residues. Comprehensive identification of redox-regulated proteins and pathways is crucial to understand ROS-mediated events. Here, we present stable isotope cysteine labelling with iodoacetamide (SICyLIA), a mass spectrometry-based workflow to assess proteome-scale cysteine oxidation. SICyLIA does not require enrichment steps and achieves unbiased proteome-wide sensitivity. Applying SICyLIA to diverse cellular models and primary tissues provides detailed insights into thiol oxidation proteomes...
April 20, 2018: Nature Communications
https://www.readbyqxmd.com/read/29679075/apkc%C3%AE-dependent-repression-of-yap-is-necessary-for-functional-restoration-of-irradiated-salivary-glands-with-igf-1
#14
Alejandro M Chibly, Wen Yu Wong, Maricela Pier, Hongqiang Cheng, Yongxin Mu, Ju Chen, Sourav Ghosh, Kirsten H Limesand
Xerostomia and salivary hypofunction often result as a consequence of radiation therapy for head and neck cancers, which are diagnosed in roughly 60,000 individuals every year in the U.S. Due to the lack of effective treatments for radiation-induced salivary hypofunction, stem cell-based therapies have been suggested to regenerate the irradiated salivary glands. Pharmacologically, restoration of salivary gland function has been accomplished in mice by administering IGF-1 shortly after radiation treatment, but it is not known if salivary stem and progenitor cells play a role...
April 20, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29679069/pharmacological-treatment-of-adult-bipolar-disorder
#15
REVIEW
Ross J Baldessarini, Leonardo Tondo, Gustavo H Vázquez
We summarize evidence supporting contemporary pharmacological treatment of phases of BD, including: mania, depression, and long-term recurrences, emphasizing findings from randomized, controlled trials (RCTs). Effective treatment of acute or dysphoric mania is provided by modern antipsychotics, some anticonvulsants (divalproex and carbamazepine), and lithium salts. Treatment of BD-depression remains unsatisfactory but includes some modern antipsychotics (particularly lurasidone, olanzapine + fluoxetine, and quetiapine) and the anticonvulsant lamotrigine; value and safety of antidepressants remain controversial...
April 20, 2018: Molecular Psychiatry
https://www.readbyqxmd.com/read/29678962/open-label-cluster-randomised-controlled-trial-and-economic-evaluation-of-a-brief-letter-from-a-gp-on-unscheduled-medical-contacts-associated-with-the-start-of-the-school-year-the-pleasant-trial
#16
Steven A Julious, Michelle J Horspool, Sarah Davis, Matthew Franklin, W Henry Smithson, Paul Norman, Rebecca M Simpson, Heather Elphick, Oscar Bortolami, Cindy Cooper
BACKGROUND: Asthma is seasonal with peaks in exacerbation rates in school-age children associated with the return to school following the summer vacation. A drop in prescription collection in August is associated with an increase in the number of unscheduled contacts after the school return. OBJECTIVE: To assess whether a public health intervention delivered in general practice reduced unscheduled medical contacts in children with asthma. DESIGN: Cluster randomised trial with trial-based economic evaluation...
April 20, 2018: BMJ Open
https://www.readbyqxmd.com/read/29678960/toxoplasma-gondii-acetyl-coa-synthetase-is-involved-in-fatty-acid-elongation-of-long-fatty-acid-chains-during-tachyzoite-life-stages
#17
David Dubois, Stella Fernandes, Souad Amiar, Sheena Dass, Nicholas J Katris, Cyrille Y Botte, Yoshiki Yamaryo-Botte
Apicomplexan parasites are pathogens responsible for major human diseases such as toxoplasmosis caused by Toxoplasma gondii and malaria caused by Plasmodium spp.. Throughout their intracellular division cycle, the parasites require vast and specific amounts of lipids to divide and survive. This demand for lipids relies on a fine balance between de novo synthesized lipids and scavenged lipids from the host. Acetyl-CoA is a major and central precursor for many metabolic pathways especially for lipid biosynthesis...
April 20, 2018: Journal of Lipid Research
https://www.readbyqxmd.com/read/29678929/antibiotic-use-after-removal-of-penicillin-allergy-label
#18
David Vyles, Asriani Chiu, John Routes, Mariana Castells, Elizabeth J Phillips, Jennifer Kibicho, David C Brousseau
BACKGROUND: Penicillin allergy is commonly reported in the pediatric emergency department. We previously performed 3-tier penicillin allergy testing on children with low-risk symptoms, and 100% tolerated a penicillin challenge without an allergic reaction. We hypothesized that no serious allergic reactions would occur after re-exposure to penicillin and that prescription practices would change after testing. METHODS: We performed a follow-up case series of 100 children whose test results were negative for penicillin allergy...
April 20, 2018: Pediatrics
https://www.readbyqxmd.com/read/29678798/analysis-of-college-students-personal-health-information-activities-online-survey
#19
Sujin Kim, Donghee Sinn, Sue Yeon Syn
BACKGROUND: With abundant personal health information at hand, individuals are faced with a critical challenge in evaluating the informational value of health care records to keep useful information and discard that which is determined useless. Young, healthy college students who were previously dependents of adult parents or caregivers are less likely to be concerned with disease management. Personal health information management (PHIM) is a special case of personal information management (PIM) that is associated with multiple interactions among varying stakeholders and systems...
April 20, 2018: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/29678795/a-novel-platform-for-in-vivo-detection-of-cytokine-release-within-discrete-brain-regions
#20
Kaixin Zhang, Michael V Baratta, Guozhen Liu, Matthew G Frank, Nathan R Leslie, Linda R Watkins, Steven F Maier, Mark R Hutchinson, Ewa M Goldys
Mounting evidence indicates that cytokines secreted by innate immune cells in the brain play a central role in regulating neural circuits that subserve mood, cognition, and sickness responses. A major impediment to the study of neuroimmune signaling in healthy and disease states is the absence of tools for in vivo detection of cytokine release in the brain. Here we describe the design and application of a cytokine detection device capable of serial monitoring of local cytokine release in discrete brain regions...
April 17, 2018: Brain, Behavior, and Immunity
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