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https://www.readbyqxmd.com/read/28550790/trophic-fate-of-inorganic-and-methyl-mercury-in-a-macrophyte-chironomid-food-chain
#1
Rebecca Beauvais-Flück, Frédéric Gimbert, Ophélie Méhault, Claudia Cosio
Dietary transfer of mercury (Hg) is central for its effects on higher trophic animals, nonetheless, its driving parameters and characteristics are not well understood. Here we measured Hg species transfer (uptake) from the macrophyte Elodea nuttallii -mimicking tissues incorporation in sediments after decay- to Chironomus riparius. Methyl-Hg (MMHg) was more transferable than inorganic Hg (IHg) from plant's intracellular and cell wall compartments. After 10-d-long exposure, MMHg was predominantly found in MMHg form in the cytosolic compartment (S) of chironomids, while IHg showed similar concentrations in S and insoluble debris (P) compartments...
May 17, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28550515/fluctuating-asymmetry-rather-than-oxidative-stress-in-bufo-raddei-can-be-an-accurate-indicator-of-environmental-pollution-induced-by-heavy-metals
#2
Rui Guo, Wenya Zhang, Shiwei Ai, Liang Ren, Yingmei Zhang
Oxidative stress (OS) and fluctuating asymmetry (FA) as risk markers for environmental stress are widely used to predict changes in the health and fitness of many animals exposed to pollutants. However, from the perspective of protecting declining amphibians, it remains to be verified which one would be a reliable indicator for amphibians exposed to long-term heavy metal pollution under natural conditions. In this study, the OS and FA of Bufo raddei exposed to natural heavy metal pollution were analyzed to determine which marker is more accurate for indicating heavy metal-induced stress...
June 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28550372/tnf%C3%AE-induced-dlk-activation-contributes-to-apoptosis-in-the-beta-cell-line-hit
#3
Svenja Börchers, Rohollah Babaei, Catarina Klimpel, Jorge Duque Escobar, Sabine Schröder, Roland Blume, Muhammad Nasir Hayat Malik, Elke Oetjen
Reduction in beta-cell mass and function contributes to the pathogenesis of diabetes mellitus type 2. The proinflammatory cytokines tumor necrosis factor (TNF)α and interleukin (IL)-1β have been implicated in the pathogenesis of this disease. Overexpression of the dual leucine zipper kinase (DLK) inhibits beta-cell function and induces apoptosis in the beta-cell line HIT. In the present study, it was investigated whether TNFα or IL-1β stimulates DLK enzymatic activity. Immunoblot analysis, transient transfection with luciferase reporter gene assays, and immunofluorescence were used...
May 27, 2017: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/28550308/fortilin-binds-ire1%C3%AE-and-prevents-er-stress-from-signaling-apoptotic-cell-death
#4
Decha Pinkaew, Abhijnan Chattopadhyay, Matthew D King, Preedakorn Chunhacha, Zhihe Liu, Heather L Stevenson, Yanjie Chen, Patuma Sinthujaroen, Owen M McDougal, Ken Fujise
The endoplasmic reticulum, the cytoplasmic organelle that matures a massive amount of nascent secretory polypeptides, is particularly sensitive to stress. Endoplasmic reticulum stress causes unfolded proteins to populate the organelle, eliciting the unfolded protein response. During the unfolded protein response, GRP78-an endoplasmic reticulum master stress regulator-detaches from three endoplasmic reticulum stress sensors (IRE1α, PERK, and ATF6) and allows them to activate the apoptotic signaling pathway...
May 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28550248/cd44-splice-variants-as-potential-players-in%C3%A2-alzheimer-s-disease-pathology
#5
Elhanan Pinner, Yaron Gruper, Micha Ben Zimra, Don Kristt, Moshe Laudon, David Naor, Nava Zisapel
Alzheimer's disease (AD) is a progressive neurodegenerative disorder characterized by cognitive deficits, deposition of amyloid-β (Aβ) plaques, intracellular neurofibrillary tangles, and neuronal cell death. Neuroinflammation is commonly believed to participate in AD pathogenesis. CD44 is an inflammation-related gene encoding a widely-distributed family of alternatively spliced cell surface glycoproteins that have been implicated in inflammation, metastases, and inflammation-linked neuronal injuries. Here we investigated the expression patterns of CD44S (which does not contain any alternative exon) and CD44 splice variants in postmortem hippocampal samples from AD patients and matched non-AD controls...
May 25, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28550086/the-iron-dependent-mitochondrial-superoxide-dismutase-soda-promotes-leishmania-virulence
#6
Bidyottam Mittra, Maria Fernanda Laranjeira-Silva, Danilo Ciccone Miguel, Juliana Perrone Bezerra de Menezes, Norma W Andrews
Leishmaniasis is one of the leading global neglected diseases, affecting millions of people worldwide. Leishmania infection depends on the ability of insect-transmitted metacyclic promastigotes to invade mammalian hosts, differentiate into amastigotes and replicate inside macrophages. To counter the hostile oxidative environment inside macrophages, these protozoans contain anti-oxidant systems that include iron-dependent superoxide dismutases (SODs) in mitochondria and glycosomes. Increasing evidence suggests that in addition to this protective role, Leishmania mitochondrial SOD may also initiate H2O2-mediated redox signaling that regulates gene expression and metabolic changes associated with differentiation into virulent forms...
May 26, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28550049/recovery-of-ethanol-induced-akkermansia-muciniphila-depletion-ameliorates-alcoholic-liver-disease
#7
Christoph Grander, Timon E Adolph, Verena Wieser, Patrick Lowe, Laura Wrzosek, Benedek Gyongyosi, Doyle V Ward, Felix Grabherr, Romana R Gerner, Alexandra Pfister, Barbara Enrich, Dragos Ciocan, Sophie Macheiner, Lisa Mayr, Matthias Drach, Patrizia Moser, Alexander R Moschen, Gabriel Perlemuter, Gyongyi Szabo, Anne Marie Cassard, Herbert Tilg
OBJECTIVE: Alcoholic liver disease (ALD) is a global health problem with limited therapeutic options. Intestinal barrier integrity and the microbiota modulate susceptibility to ALD. Akkermansia muciniphila, a Gram-negative intestinal commensal, promotes barrier function partly by enhancing mucus production. The aim of this study was to investigate microbial alterations in ALD and to define the impact of A. muciniphila administration on the course of ALD. DESIGN: The intestinal microbiota was analysed in an unbiased approach by 16S ribosomal DNA (rDNA) sequencing in a Lieber-DeCarli ALD mouse model, and faecal A...
May 26, 2017: Gut
https://www.readbyqxmd.com/read/28549881/health-problems-and-disinfectant-product-exposure-among-staff-at-a-large-multispecialty-hospital
#8
Megan L Casey, Brie Hawley, Nicole Edwards, Jean M Cox-Ganser, Kristin J Cummings
BACKGROUND: Hospital staff expressed health concerns after a surface disinfectant product containing hydrogen peroxide, peracetic acid, and acetic acid was introduced. We sought to determine if this product posed a health hazard. METHODS: An interviewer-administered questionnaire on work and health characteristics was completed by 163 current staff. Symptoms that improved away from work were considered work-related. Forty-nine air samples were taken for hydrogen peroxide, peracetic acid, and acetic acid...
May 23, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28549846/physical-activity-and-age-related-macular-degeneration-a-systematic-literature-review-and-meta-analysis
#9
Myra B McGuinness, Jerome Le, Paul Mitchell, Bamini Gopinath, Ester Cerin, Nicole T M Saksens, Tina Schick, Carel B Hoyng, Robyn H Guymer, Robert P Finger
PURPOSE: Age-related macular degeneration (AMD) is the main cause of irreversible severe vision loss in developed countries. It has been suggested that a healthy lifestyle may assist in delaying the onset and progression of AMD, however evidence for an association between physical activity and age-related macular degeneration (AMD) remains inconclusive. DESIGN: Systematic review and meta-analysis METHODS: Medline, EMBASE and Google Scholar were systematically searched for studies up to May 2015...
May 23, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28549451/clinical-and-laboratory-evaluation-of-new-immigrant-and-refugee-children-arriving-in-greece
#10
Ioanna D Pavlopoulou, Marsela Tanaka, Stavroula Dikalioti, Evangelia Samoli, Pavlos Nisianakis, Olga D Boleti, Konstantinos Tsoumakas
BACKGROUND: Migrant children are a population at risk for various health problems. Despite the increased inflow of migrants in Greece, data regarding their health assessment are lacking. This study aims to describe the clinical and certain laboratory characteristics and identify possible associations in a group of new immigrant (I) and refugee (R) children, arriving in Athens, Greece. METHODS: A prospective, cross- sectional study was performed in a migrant outpatient clinic of a tertiary Children's hospital...
May 26, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28549425/fast-and-robust-adjustment-of-cell-mixtures-in-epigenome-wide-association-studies-with-smartsva
#11
Jun Chen, Ehsan Behnam, Jinyan Huang, Miriam F Moffatt, Daniel J Schaid, Liming Liang, Xihong Lin
BACKGROUND: One problem that plagues epigenome-wide association studies is the potential confounding due to cell mixtures when purified target cells are not available. Reference-free adjustment of cell mixtures has become increasingly popular due to its flexibility and simplicity. However, existing methods are still not optimal: increased false positive rates and reduced statistical power have been observed in many scenarios. METHODS: We develop SmartSVA, an optimized surrogate variable analysis (SVA) method, for fast and robust reference-free adjustment of cell mixtures...
May 26, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28549409/a-qualitative-study-of-immigrant-women-on-long-term-sick-leave-and-their-experience-of-dignity
#12
Line Nortvedt, Bernadette Nirmal Kumar, Vibeke Lohne
PURPOSE: The purpose of this study was to explore if and how immigrant women suffering from chronic pain experience and maintain their dignity, during rehabilitation. METHODS: The study was designed as a field study, with participant observation and in-depth interviews. Participant observations were carried out during a rehabilitation course for 14 immigrant women on an outpatient clinic at a rehabilitation hospital in southern Norway. In-depth interviews were performed after the rehabilitation period...
May 26, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28549304/landowner-preferences-for-wetlands-conservation-programs-in-two-southern-ontario-watersheds
#13
Ryan Trenholm, Wolfgang Haider, Van Lantz, Duncan Knowler, Pascal Haegeli
Wetlands in the region of Southern Ontario, Canada have declined substantially from their historic area. Existing regulations and programs have not abated this decline. However, reversing this trend by protecting or restoring wetlands will increase the supply of important ecosystem services. In particular, these actions will contribute to moderating the impacts of extreme weather predicted to result from climate change as well as reducing phosphorous loads in Lake Erie and ensuing eutrophication. Since the majority of land in the region is privately owned, landowners can play an important role...
May 23, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28549233/processing-the-papal-encyclical-through-perceptual-filters-pope-francis-identity-protective-cognition-and-climate-change-concern
#14
Asheley R Landrum, Robert B Lull, Heather Akin, Ariel Hasell, Kathleen Hall Jamieson
Previous research suggests that when individuals encounter new information, they interpret it through perceptual 'filters' of prior beliefs, relevant social identities, and messenger credibility. In short, evaluations are not based solely on message accuracy, but also on the extent to which the message and messenger are amenable to the values of one's social groups. Here, we use the release of Pope Francis's 2015 encyclical as the context for a natural experiment to examine the role of prior values in climate change cognition...
May 23, 2017: Cognition
https://www.readbyqxmd.com/read/28549098/high-protein-foods-and-physical-activity-protect-against-age-related-muscle-loss-and-functional-decline
#15
M Loring Bradlee, Jabed Mustafa, Martha R Singer, Lynn L Moore
Background: Some clinical trials suggest that protein supplementation enhances the effects of resistance exercise on skeletal muscle mass (SMM); fewer studies examine the effects of diets rich in protein-source foods on SMM and functional status among community-dwelling adults. Methods: Data from the Framingham Offspring study including diet (three-day records, exams 3 and 5), physical activity (exams 2 and 4), percent SMM (%SMM) (exams 6 and 7), and functional performance (exams 5 through 8) were used to evaluate independent and combined effects of physical activity and high-protein foods on adjusted mean %SMM (using analysis of covariance) and risk of functional decline (using Cox proportional hazard's models)...
May 25, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28548957/involvement-of-p38-%C3%AE-trcp-tristetraprolin-tnf%C3%AE-axis-in-radiation-pneumonitis
#16
Pranathi Meda Krishnamurthy, Shirish Shukla, Paramita Ray, Rohit Mehra, Mukesh K Nyati, Theodore S Lawrence, Dipankar Ray
Early release of tumor necrosis factor-alpha (TNF-α) during radiotherapy of thoracic cancers plays an important role in radiation pneumonitis, whose inhibition may provide lung radioprotection. We previously reported radiation inactivates Tristetraprolin (TTP), a negative regulator of TNF-α synthesis, which correlated with increased TNF-α release. However, the molecular events involved in radiation-induced TTP inactivation remain unclear. To determine if eliminating Ttp in mice resulted in a phenotypic response to radiation, Ttp-null mice lungs were exposed to a single dose of 15 Gy, and TNF-α release and lung inflammation were analyzed at different time points post-irradiation...
May 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28548651/foetal-haemoglobin-blood-transfusion-and-retinopathy-of-prematurity-in-very-preterm-infants-a-pilot-prospective-cohort-study
#17
C J Stutchfield, A Jain, D Odd, C Williams, R Markham
PurposeTo identify if there is an association between foetal haemoglobin (HbF) concentration and retinopathy of prematurity (ROP) in very preterm infants.Patients and methodsProspective cohort study. Infants born <32 weeks' gestational age or <1501 g in two tertiary neonatal units between January 2012 and May 2013 (n=42) were enrolled. HbF and adult haemoglobin (HbA) concentrations were measured using high-pressure liquid chromatography from blood samples sent as part of routine neonatal care once routinely requested laboratory tests had been performed...
May 26, 2017: Eye
https://www.readbyqxmd.com/read/28548620/baicalein-exerts-beneficial-effects-in-d-galactose-induced-aging-rats-through-attenuation-of-inflammation-and-metabolic-dysfunction
#18
Dan-Dan Duan, Ke Xin Wang, Yu-Zhi Zhou, Xue-Mei Qin, Li Gao, Guan-Hua Du
Baicalein is a flavonoid isolated from the roots of Scutellaria baicalensis Georgi. This study aimed to ascertain the effects and potential underlying mechanisms of baicalein in D-galactose induced aging rat model by integration of behavior examination, biochemical detection and 1H NMR based metabolomic approach. Our findings suggest that baicalein significantly attenuated memory decline in D-galactose induced aging model, as manifested by increasing recognition index in novel object recognition test, shortening latency time and increasing platform crossings in morris water maze test...
May 26, 2017: Rejuvenation Research
https://www.readbyqxmd.com/read/28548476/is-cold-blood-cardioplegia-absolutely-superior-to-cold-crystalloid-cardioplegia-in-aortic-valve-surgery
#19
Daniel A Lerman, Matilde Otero-Losada, Kiddy Ume, Pablo A Salgado, Sai Prasad, Kelvin Lim, Bruno Péault, Nasri Alotti
BACKGROUND: Experimental evidence suggests that blood cardioplegia (BCP) may be superior to cold crystalloid cardioplegia (CCP) for myocardial protection. However, robust clinical data are lacking. We compared post-operative outcome of patients undergoing aortic valve replacement (AVR) using cold anterograde-retrograde intermittent BCP versus anterograde (CCP). METHODS: Adult consecutive isolated AVR performed between April 2006 and February 2011 at the Royal Infirmary Hospital of Edinburgh were retrospectively analyzed...
May 26, 2017: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/28548349/head-withers-and-pelvic-movement-asymmetry-and-their-relative-timing-in-trot-in-racing-thoroughbreds-in-training
#20
T Pfau, K Noordwijk, M F Sepulveda Caviedes, E Persson-Sjodin, A Barstow, B Forbes, M Rhodin
BACKGROUND: Horses show compensatory head movement in hindlimb lameness and compensatory pelvis movement in forelimb lameness but little is known about the relationship of withers movement symmetry with head and pelvic asymmetry in horses with naturally occurring gait asymmetries. Objectives To document head, withers and pelvic movement asymmetry and timing differences in horses with naturally occurring gait asymmetries. STUDY DESIGN: Retrospective analysis of gait data...
May 26, 2017: Equine Veterinary Journal
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