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https://www.readbyqxmd.com/read/28215055/occupational-hazards-for-home-care-nurses-across-the-rural-to-urban-gradient-in-ontario-canada
#1
Matthew Wong, Margaret Saari, Erin Patterson, Martine Puts, Ann E Tourangeau
The purpose of this paper was to describe occupational hazards for nurses working in home care (HC) and explore how they differ across the rural-to-urban gradient. Responses (n = 823) from a cross-sectional survey conducted in 2012 of HC nurses registered to practise nursing in the Province of Ontario, Canada were used. Using chi-square analysis and posthoc pairwise tests with a Bonferroni correction, 14 occupational hazards were individually tested for differences between four geographical settings (rural, town, suburban or urban areas)...
February 19, 2017: Health & Social Care in the Community
https://www.readbyqxmd.com/read/28215043/is-the-change-of-percutaneous-oxygen-pressure-available-to-judge-the-effects-of-brachial-plexus-block
#2
Tomoki Nishiyama
BACKGROUND: To know the objective methods of the effects of the brachial plexus block, we studied the changes in percutaneous oxygen pressure (tcPO₂) with the hypothesis that tcPO₂ increases significantly on the blocked arm in comparison with the non-blocked arm, a phenomenon which is connected with vasodilation following the brachial plexus block. METHODS: Fifteen patients scheduled for upper extremity surgery, aged 20 to 70 years, with ASA physical status I or II were included...
February 19, 2017: Anaesthesiology Intensive Therapy
https://www.readbyqxmd.com/read/28215000/angiotensin-ii-receptor-blockers-attenuate-lipopolysaccharide-induced-memory-impairment-by-modulation-of-nf-%C3%AE%C2%BAb-mediated-bdnf-creb-expression-and-apoptosis-in-spontaneously-hypertensive-rats
#3
Ruby Goel, Shahnawaz Ali Bhat, Kashif Hanif, Chandishwar Nath, Rakesh Shukla
Clinical studies demonstrated a positive correlation between hypertension and cognitive decline. Beneficial effects of angiotensin II receptor blockers on cognitive functions have also been reported earlier; however, its role in chronic neuroinflammation-induced memory impairment in the hypertensive state is not well understood. Therefore, in the present study, we investigated the effect of angiotensin II receptor blockers on memory impairment induced by lipopolysaccharide (LPS) in spontaneously hypertensive rats (SHRs)...
February 18, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28214987/severe-convulsions-and-dysmyelination-in-both-jimpy-and-cx32-47-mice-may-associate-astrocytic-l-channel-function-with-myelination-and-oligodendrocytic-connexins-with-internodal-kv-channels
#4
Y H Gerald Chaban, Ye Chen, Elna Hertz, Leif Hertz
The Jimpy mouse illustrates the importance of interactions between astrocytes and oligodendrocytes. It has a mutation in Plp coding for proteolipid protein and DM20. Its behavior is normal at birth but from the age of ~2 weeks it shows severe convulsions associated with oligodendrocyte/myelination deficits and early death. A normally occurring increase in oxygen consumption by highly elevated K(+) concentrations is absent in Jimpy brain slices and cultured astrocytes, reflecting that Plp at early embryonic stages affects common precursors as also shown by the ability of conditioned medium from normal astrocytes to counteract histological abnormalities...
February 18, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28214969/attached-and-suspended-denitrifier-communities-in-pristine-limestone-aquifers-harbor-high-fractions-of-potential-autotrophs-oxidizing-reduced-iron-and-sulfur-compounds
#5
M Herrmann, S Opitz, R Harzer, K U Totsche, K Küsel
Oxygen and nitrate availability as well as the presence of suitable organic or inorganic electron donors are strong drivers of denitrification; however, the factors influencing denitrifier abundance and community composition in pristine aquifers are not well understood. We explored the denitrifier community structure of suspended and attached groundwater microorganisms in two superimposed limestone aquifer assemblages with contrasting oxygen regime in the Hainich Critical Zone Exploratory (Germany). Attached communities were retrieved from freshly crushed parent rock material which had been exposed for colonization in two groundwater wells (12...
February 18, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28214930/investigation-of-optical-neuro-monitoring-technique-for-detection-of-maintenance-and-emergence-states-during-general-anesthesia
#6
Gabriela Hernandez-Meza, Meltem Izzetoglu, Mary Osbakken, Michael Green, Hawa Abubakar, Kurtulus Izzetoglu
The American Society of Anesthesiologist recommends peripheral physiological monitoring during general anesthesia, which offers no information regarding the effects of anesthetics on the brain. Since no "gold standard" method exists for this evaluation, such a technique is needed to ensure patient comfort, procedure quality and safety. In this study we investigated functional near infrared spectroscopy (fNIRS) as possible monitor of anesthetic effects on the prefrontal cortex. Anesthetic drugs, such as sevoflurane, suppress the cerebral metabolism and alter the cerebral blood flow...
February 18, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28214891/up-regulated-atf4-expression-increases-cell-sensitivity-to-apoptosis-in-response-to-radiation
#7
Ying Zong, Shijie Feng, Jinwei Cheng, Chenlin Yu, Guocai Lu
BACKGROUND/AIMS: Activating transcription factor 4 (ATF4) is a member of the activating transcription factor family which regulates the expression of genes involved in amino acid metabolism, redox homeostasis and ER stress responses. ATF4 is also over-expressed in human solid tumors, although its effect on responsiveness to radiation is largely unexplored. METHODS: Real-time PCR was used to detect ATF4 mRNA levels in cells treated with different doses of 60Coγ radiation...
February 13, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214884/transient-receptor-potential-melastatin-4-trpm4-contributes-to-high-salt-diet-mediated-early-stage-endothelial-injury
#8
Xiao-Qing Ding, Tao Ban, Zeng-Yan Liu, Jie Lou, Liang-Liang Tang, Jia-Xin Wang, Wen-Feng Chu, Dan Zhao, Bin-Lin Song, Zhi-Ren Zhang
BACKGROUND/AIMS: The present study investigated whether the transient receptor potential melastatin 4 (TRPM4) channel plays a role in high salt diet (HSD)-induced endothelial injuries. METHODS: Western blotting and immunofluorescence were used to examine TRPM4 expression in the mesenteric endothelium of Dahl salt-sensitive (SS) rats fed a HSD. The MTT, TUNEL, and transwell assays were used to evaluate the cell viability, cell apoptosis, and cell migration, respectively, of human umbilical vein endothelial cells (HUVECs)...
February 16, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214869/effects-of-antimalarial-tafenoquine-on-blood-platelet-activity-and-survival
#9
Hang Cao, Rosi Bissinger, Anja T Umbach, Abdulla Al Mamun Bhuyan, Florian Lang, Meinrad Gawaz
BACKGROUND/AIMS: The 8-aminoquinoline tafenoquine has been shown to be effective against Plasmodia, Leishmania and Trypanosoma. The substance is at least in part effective by triggering apoptosis of the parasites. Moreover, tafenoquine has been shown to trigger eryptosis, the suicidal erythrocyte death characterized by cell shrinkage and cell membrane scrambling with phosphatidylserine translocation to the erythrocyte surface. The effect of tafenoquine on eryptosis is in part due to stimulation of Ca2+ entry and oxidative stress...
January 26, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214860/stimulation-of-erythrocyte-cell-membrane-scrambling-by-adarotene
#10
Morena Mischitelli, Mohamed Jemaàa, MyriamFezai Fezai, Mustafa Almasry, Florian Lang, Caterina Faggio
BACKGROUND/AIMS: The atypical retinoid E23-(40-hydroxyl-30-adamantylbiphenyl-4-yl) acrylic acid (ST1926, adarotene) is used in the treatment of malignancy. The effect of ST1926 is at least in part due to stimulation of apoptosis. Similar to apoptosis of nucleated cells, erythrocytes may enter eryptosis, the suicidal death of erythrocytes. Hallmarks of eryptosis include cell shrinkage and cell membrane scrambling with phosphatidylserine translocation to the erythrocyte surface. Signaling involved in the stimulation of eryptosis includes increase of cytosolic Ca2+ activity [Ca2+]<Sub>i</Sub>, oxidative stress and ceramide...
January 30, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214849/lipopeptide-induced-suicidal-erythrocyte-death-correlates-with-the-degree-of-acylation
#11
Abdulla Al Mamun Bhuyan, Minh-Thu Nguyen, Rosi Bissinger, Friedrich Götz, Florian Lang
BACKGROUND/AIMS: Consequences of bacterial infection include anemia, which could result from stimulation of suicidal erythrocyte death or eryptosis, characterized by cell shrinkage and cell membrane scrambling with phosphatidylserine translocation to the erythrocyte surface. Bacterial components known to stimulate eryptosis include lipopeptides. Signaling mediating the triggering of eryptosis include increased cytosolic Ca2+ activity ([Ca2+]<Sub>i</Sub>), oxidative stress and cellular accumulation of ceramide...
January 24, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214754/new-pt-nnso-core-anticancer-agents-structural-optimization-and-investigation-of-their-anticancer-activity
#12
Shu Xian Chong, Yinxue Jin, Steve Chik Fun Au-Yeung, Kenneth Kin Wah To
A series of new platinum Pt(II) compounds possessing a bidentate leaving ligand modified from oxaliplatin has been synthesized, with one of the oxygen ligating atom substituted for a sulphur atom (resulting in a Pt-NNSO coordination core structure). The general structures are R,R-diaminocyclohexane (DACH)-Pt-(methylthio)acetic acid (K4) and DACH-Pt-(thiophenylacetic acid) (K4 derivatives). Substitution of an electron donating or withdrawing group at the ortho or para position on the phenyl ring of K4 derivatives was found to affect the complexes' stability, reactivity with the biological molecules (5'-guanosine monophosphate (5'-GMP) and L-methionine (L-Met)) and anticancer activity...
February 12, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28214729/improved-tolerance-to-transplanting-injury-and-chilling-stress-in-rice-seedlings-treated-with-orysastrobin
#13
Naoto Takahashi, Yukari Sunohara, Masami Fujiwara, Hiroshi Matsumoto
In addition to their fungicidal activity, strobilurin-type fungicides are reported to show enhancing effects on crop growth and yield. Previous studies suggested that the fungicide has a mitigating effect on abiotic stresses. However, there are few reports about growth enhancement through abiotic stress alleviation by strobilurin-type fungicides, but the mechanism of action of the growth enhancement is still not clear. The present study revealed that orysastrobin enhanced rice seedling growth after root cutting injury and chilling stress...
February 7, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28214728/lipid-signalling-mediated-by-pld-pa-modulates-proline-and-h2o2-levels-in-barley-seedlings-exposed-to-short-and-long-term-chilling-stress
#14
Micaela Peppino Margutti, Matias Reyna, María Verónica Meringer, Graciela E Racagni, Ana Laura Villasuso
Phospholipase D (PLD) hydrolyses phospholipids to yield phosphatidic acid (PA) and a head group, and is involved in responses to a variety of environmental stresses, including chilling and freezing stress. Barley responses to chilling stress (induced by incubating seedlings at 4 °C) are dynamic and the duration of stress, either short (0-180 min) or long-term (24-36 h) had a significant impact on the response. We investigated the roles of PLD/PA in responses of barley (Hordeum vulgare) seedlings to short and long-term chilling stress, based on regulation of proline and reactive oxygen species (ROS) levels...
February 10, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28214718/alkyl-substituent-effect-on-photosensitized-inactivation-of-escherichia-coli-by-pyridinium-bonded-p-porphyrins
#15
Jin Matsumoto, Yusaku Suemoto, Hiroki Kanemaru, Kyosuke Takemori, Masato Shigehara, Akari Miyamoto, Haruhiko Yokoi, Masahide Yasuda
Activity of singlet oxygen sensitizers for photoinactivation of bacteria and photodynamic therapy of tumor cells has been evaluated using nonpathogenic model cells, such as Escherichia coli, Saccharomyces cerevisiae, and HeLa cells. Among them, E. coli, gram-negative bacterium, has complex membrane structures in the cell wall, resulting in an impermeable barrier to antimicrobial agents. Therefore, few singlet oxygen sensitizers have photoinactivation activities toward E. coli at low concentrations. Recently polycationic porphyrins have received much attention as a new type of singlet oxygen sensitizers because they have strong binding affinities for DNA and proteins...
February 6, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28214706/influence-of-oxygen-partial-pressure-on-the-characteristics-of-human-hepatocarcinoma-cells
#16
Jenifer Trepiana, Susana Meijide, Rosaura Navarro, M Luisa Hernández, José Ignacio Ruiz-Sanz, M Begoña Ruiz-Larrea
Most of the in vitro studies using liver cell lines have been performed under atmospheric oxygen partial pressure (21% O2). However, the oxygen concentrations in the liver and cancer cells are far from this value. In the present study, we have evaluated the influence of oxygen on 1) the tumor cell lines features (growth, steady-state ROS levels, GSH content, activities of antioxidant enzymes, p66 Shc and SOD expressions, metalloproteinases secretion, migration, invasion, and adhesion) of human hepatocellular carcinoma cell lines, and b) the response of the cells to an oxidant stimulus (aqueous leaf extract of the V...
February 13, 2017: Redox Biology
https://www.readbyqxmd.com/read/28214691/dlitiazem-inhibits-the-oxidative-stress-induced-by-angiotensin-ii-through-growth-hormone-secretagogue-receptor-type-1a-in-human-umbilicus-vein-endothelial-cells
#17
Lingyun Zhou, Meng Yang, Shanru Zuo, Xiaofeng Guan, Jianglin Wang, Qingjie Chen, Xiaocong Zuo, Sujie Jia, Ren Guo
Diltiazem has been used for post-transplant hypertension, but the mechanism underlying its protective effect of endothelial cells against angiotensin II (Ang II) - induced impairment remains unclear. Human umbilicus vein endothelial cells (HUVECs) were cultured and divided into seven groups: control, Ang II (10(-6)M), diltiazem (10(-6)M), [D-Lys3]-GHRP-6(25μM), diltiazem (10(-6)M)+Ang II (10(-6)M), losartan (10(-6)M)+Ang II (10(-6)M), [D-Lys3]-GHRP-6 (25μM) + Dil(10(-6)M)+Ang II (10(-6)M) groups. Nitric oxide (NO) production, intracellular reactive oxygen species (ROS) levels, protein and mRNA expressions of endothelial nitric oxide synthase (eNOS) and p47 phox subunit of NADPH were evaluated...
February 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28214624/effect-of-cobalt-loading-on-the-solid-state-properties-and-ethyl-acetate-oxidation-performance-of-cobalt-cerium-mixed-oxides
#18
M Konsolakis, S A C Carabineiro, G E Marnellos, M F Asad, O S G P Soares, M F R Pereira, J J M Órfão, J L Figueiredo
Cobalt-cerium mixed oxides were prepared by the wet impregnation method and evaluated for volatile organic compounds (VOCs) abatement, using ethyl acetate (EtAc) as model molecule. The impact of Co content on the physicochemical characteristics of catalysts and EtAc conversion was investigated. The materials were characterized by various techniques, including N2 adsorption at -196°C, scanning electron microscopy (SEM), X-ray diffraction (XRD), H2-temperature programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS) to reveal the structure-activity relationship...
February 10, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28214620/water-soluble-multifunctional-antibody-porphyrin-gold-nanoparticles-for-targeted-photodynamic-therapy
#19
Oriol Penon, María J Marín, David A Russell, Lluïsa Pérez-García
Photodynamic therapy (PDT) is a treatment of cancer by which tumour cells are destroyed using reactive oxygen species produced by photosensitizers following activation with visible or near infrared light. Successful PDT depends on the solubility and the targeting ability of the photosensitizers. In this work, the synthesis of a porphyrin-based water soluble nanoparticle conjugate containing a targeting agent that recognizes the erbB2 receptor overexpressed on the surface of particular cancer cells is reported...
February 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28214608/near-infrared-activatable-phthalocyanine-poly-l-glutamic-acid-conjugate-increased-cellular-uptake-and-light-dark-toxicity-ratio-towards-an-effective-photodynamic-cancer-therapy
#20
Lik Voon Kiew, Hoay Yan Cheah, Siew Hui Voon, Elena Gallon, Julie Movellan, Kia Hui Ng, Serkan Alpugan, Hong Boon Lee, Fabienne Dumoulin, María J Vicent, Lip Yong Chung
In photodynamic therapy (PDT), the low absorptivity of photosensitizers in an aqueous environment reduces singlet oxygen generation efficiency and thereby decreases photosensitizing efficacy in biological conditions. To circumvent this problem, we designed a phthalocyanine-poly-L-glutamic acid conjugate (1-PG) made from a new phthalocyanine (Pc 1) monofunctionalized to allow adequate conjugation to PGA. The resulting 1-PG conjugate retained high absorptivity in the near-infrared (NIR) region at its λmax 675nm in an aqueous environment...
February 15, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
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