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https://www.readbyqxmd.com/read/27936500/sodium-co-limits-and-catalyzes-macronutrients-in-a-prairie-food-web
#1
Michael Kaspari, Karl A Roeder, Brittany Benson, Michael D Weiser, Nathan Sanders
Nitrogen and phosphorus frequently limit terrestrial plant production, but have a mixed record in regulating the abundance of terrestrial invertebrates. We contrasted four ways that Na could interact with an NP fertilizer to shape the plants and invertebrates of an inland prairie. We applied NP and Na to m(2) plots in a factorial design. Aboveground invertebrate abundance was independently co-limited by NaCl and NP, but with +NP plots supporting more individuals. We suggest the disparity arises because NP enhanced plant height by 35% (1SD) over controls, providing both food and habitat while NaCl provides only food...
December 9, 2016: Ecology
https://www.readbyqxmd.com/read/27936472/relaxant-effect-of-sodium-tanshinone-iia-sulphonate-on-mouse-tracheal-smooth-muscle
#2
Yi-Lin Zhang, Jia-Wen Xu, Xiong-Hao Wu, Peng-Xiao Chen, Fang Wei, Dong-Dong Gao, Xiao-Wen Chen, Yu-Li Luo, Yun-Xin Zhu, Jiehong Huang, Ya-Xia Tan, Lei Zhao, Wen-Liang Zhou
Sodium tanshinone IIA sulphonate, a water-soluble derivative of tanshinone IIA, has been proven to possess versatile biological properties, but its pharmacological effect on tracheal smooth muscle remains elusive. This paper presents a study on the relaxant effect and underlying mechanisms of sodium tanshinone IIA sulphonate on mouse tracheal smooth muscle. The relaxant effect of sodium tanshinone IIA sulphonate was evaluated in mouse tracheal rings using a mechanical recording system. Intracellular Ca(2+) concentration was measured in primary cultured tracheal smooth muscle cells using confocal imaging system...
December 9, 2016: Planta Medica
https://www.readbyqxmd.com/read/27936281/interindividual-and-interethnic-variability-in-drug-disposition-mt%C3%A2-%C3%A2-polymorphisms-in-organic-anion-transporting-polypeptide-1b1-oatp1b1-slco1b1
#3
REVIEW
Hannah H Lee, Richard H Ho
OATP1B1 (SLCO1B1) is predominantly expressed at the basolateral membrane of hepatocytes and is critically important for the hepatic uptake and clearance of numerous drug substrates and endogenous compounds. In general, the organic anion transporting polypeptides (OATP; SLCO) represent a superfamily of uptake transporters that mediate the sodium-independent transport of a diverse range of amphipathic organic compounds including bile salts, steroid conjugates, thyroid hormones, anionic peptides, numerous drugs and other xenobiotic substances...
December 9, 2016: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/27936120/sweat-facilitated-amino-acid-losses-in-male-athletes-during-exercise-at-32-34%C3%A2-c
#4
R Hugh Dunstan, Diane L Sparkes, Benjamin J Dascombe, Margaret M Macdonald, Craig A Evans, Christopher J Stevens, Marcus J Crompton, Johan Gottfries, Jesse Franks, Grace Murphy, Ryan Wood, Timothy K Roberts
Sweat contains amino acids and electrolytes derived from plasma and athletes can lose 1-2L of sweat per hour during exercise. Sweat may also contain contributions of amino acids as well as urea, sodium and potassium from the natural moisturizing factors (NMF) produced in the stratum corneum. In preliminary experiments, one participant was tested on three separate occasions to compare sweat composition with surface water washings from the same area of skin to assess contributions from NMF. Two participants performed a 40 minute self-paced cycle session with sweat collected from cleansed skin at regular intervals to assess the contributions to the sweat load from NMF over the period of exercise...
2016: PloS One
https://www.readbyqxmd.com/read/27936089/interaction-potency-of-single-walled-carbon-nanotubes-with-dnas-a-novel-assay-for-assessment-of-hazard-risk
#5
Chunhe Yao, Cristina Carlisi, Yuning Li, Da Chen, Jianfu Ding, Yong-Lai Feng
Increasing use of single-walled carbon nanotubes (SWCNTs) necessitates a novel method for hazard risk assessment. In this work, we investigated the interaction of several types of commercial SWCNTs with single-stranded (ss) and double-stranded (ds) DNA oligonucleotides (20-mer and 20 bp). Based on the results achieved, we proposed a novel assay that employed the DNA interaction potency to assess the hazard risk of SWCNTs. It was found that SWCNTs in different sizes or different batches of the same product number of SWCNTs showed dramatically different potency of interaction with DNAs...
2016: PloS One
https://www.readbyqxmd.com/read/27935984/a-biodegradable-polyethylenimine-based-vector-modified-by-trifunctional-peptide-r18-for-enhancing-gene-transfection-efficiency-in-vivo
#6
Jing Hu, Manman Zhu, Kehai Liu, Hua Fan, Wenfang Zhao, Yuan Mao, Yaguang Zhang
Lack of capacity to cross the nucleus membrane seems to be one of the main reasons for the lower transfection efficiency of gene vectors observed in vivo study than in vitro. To solve this problem, a new non-viral gene vector was designed. First, a degradable polyethylenimine (PEI) derivate was synthesized by crosslinking low-molecular-weight (LMW) PEI with N-octyl-N-quaternary chitosan (OTMCS), and then adopting a designed trifunctional peptide (RGDC-TAT-NLS) with good tumor targeting, cell uptake and nucleus transport capabilities to modify OTMCS-PEI...
2016: PloS One
https://www.readbyqxmd.com/read/27935981/sympathetic-hyperactivity-increased-tyrosine-hydroxylase-and-exaggerated-corpus-cavernosum-relaxations-associated-with-oxidative-stress-plays-a-major-role-in-the-penis-dysfunction-in-townes-sickle-cell-mouse
#7
Fábio H Silva, Mário A Claudino, Fabiano B Calmasini, Eduardo C Alexandre, Carla Franco-Penteado, Arthur L Burnett, Edson Antunes, Fernando F Costa
BACKGROUND: Sickle cell disease patients display priapism that may progress to erectile dysfunction. However, little is known about the pathophysiological alterations of corpus cavernosum in sickle cell disease. OBJECTIVE: Thus, this study aimed to evaluate the functional and molecular alterations of sympathetic machinery and nitric oxide-cyclic guanosine monophosphate signaling pathway in Townes transgenic sickle cell disease mice. METHODS: Concentration-response curves to contractile (phenylephrine) and relaxant agents (acetylcholine and sodium nitroprusside) were obtained in corpus cavernosum strips from sickle and C57BL/6 (control) mice...
2016: PloS One
https://www.readbyqxmd.com/read/27935977/the-effects-of-a-community-based-sodium-reduction-program-in-rural-china-a-cluster-randomized-trial
#8
Nicole Li, Lijing L Yan, Wenyi Niu, Chen Yao, Xiangxian Feng, Jianxin Zhang, Jingpu Shi, Yuhong Zhang, Ruijuan Zhang, Zhixin Hao, Hongling Chu, Jing Zhang, Xian Li, Jianhong Pan, Zhifang Li, Jixin Sun, Bo Zhou, Yi Zhao, Yan Yu, Michael Engelgau, Darwin Labarthe, Jixiang Ma, Stephen MacMahon, Paul Elliott, Yangfeng Wu, Bruce Neal
BACKGROUND: Average sodium intake and stroke mortality in northern China are both among the highest in the world. An effective, low-cost strategy to reduce sodium intake in this population is urgently needed. OBJECTIVE: We sought to determine the effects of a community-based sodium reduction program on salt consumption in rural northern China. DESIGN: This study was a cluster-randomized trial done over 18 months in 120 townships (one village from each township) from five provinces...
2016: PloS One
https://www.readbyqxmd.com/read/27935926/hyponatremia-in-patients-with-community-acquired-pneumonia
#9
L Karki, B Thapa, M K Sah
INTRODUCTION: Community acquired pneumonia is one the frequent cause of hospital admissions. Whereas, hyponatremia is a common electrolyte abnormality in hospitalized patients and has been shown to be associated with considerable morbidity and mortality. We aim to studyt the association of hyponatremia with community acquired pneumonia in terms of morbidity and mortality. METHODS: A prospective observational hospital based study was conducted in a hospital for a year...
April 2016: JNMA; Journal of the Nepal Medical Association
https://www.readbyqxmd.com/read/27935901/sodium-supply-influences-plasma-sodium-concentration-and-the-risks-of-hyper-and-hyponatremia-in-extremely-preterm-infants
#10
Cornelia Späth, Elisabeth Stoltz Sjöström, Fredrik Ahlsson, Johan Ågren, Magnus Domellöf
BackgroundHyper- and hyponatremia occur frequently in extremely preterm (EPT) infants. Our purpose was to investigate plasma sodium (P-Na) concentrations, the incidence of hyper- and hyponatremia, and the impact of possible predisposing factors in EPT infants.MethodsIn this observational study, we analysed data from the EXtremely PREterm (< 27wks.) infants in Sweden Study (EXPRESS, n=707). Detailed nutritional, laboratory and weight data were collected retrospectively from patient records.ResultsMean ± SD P-Na increased from 135...
December 9, 2016: Pediatric Research
https://www.readbyqxmd.com/read/27935860/t-lymphocyte-shp2-deficiency-triggers-anti-tumor-immunity-to-inhibit-colitis-associated-cancer-in-mice
#11
Wen Liu, Wenjie Guo, Lihong Shen, Zhen Chen, Qiong Luo, Xiaolin Luo, Gen-Sheng Feng, Yongqian Shu, Yanhong Gu, Qiang Xu, Yang Sun
Nonresolving inflammation is involved in the initiation and progression process of tumorigenesis. Src homology 2 domain-containing tyrosine phosphatase 2 (SHP2) is known to inhibit acute inflammation but its role in chronic inflammation-associated cancer remains unclear. The role of SHP2 in T cells in dextran sulfate sodium (DSS)-induced colitis and azoxymethane-DSS-induced colitis-associated carcinogenesis was examined using SHP2CD4-/- conditional knockout mice. SHP2 deficiency in T cells aggravated colitis with increased level of pro-inflammatory cytokines including IFN-γ and IL-17A...
December 7, 2016: Oncotarget
https://www.readbyqxmd.com/read/27935523/telehealth-methods-to-deliver-dietary-interventions-in-adults-with-chronic-disease-a-systematic-review-and-meta-analysis
#12
Jaimon T Kelly, Dianne P Reidlinger, Tammy C Hoffmann, Katrina L Campbell
BACKGROUND: The long-term management of chronic disease requires the adoption of complex dietary recommendations, which can be facilitated by regular coaching to support behavioral changes. Telehealth interventions can overcome patient-centered barriers to accessing face-to-face programs and provide feasible delivery methods, accessible regardless of geographic location. OBJECTIVE: This systematic review assessed the effectiveness of telehealth dietary interventions at facilitating dietary change in chronic disease...
December 2016: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27935319/haplotype-association-and-synergistic-effect-of-human-aldosterone-synthase-cyp11b2-gene-polymorphisms-causing-susceptibility-to-essential-hypertension-in-indian-patients
#13
Uppuluri Mohana Vamsi, Nagalingam Swapna, Gunda Padma, Satti Vishnupriya, Tirunilai Padma
BACKGROUND: Aldosterone synthase (CYP11B2) is a key enzyme involved in the terminal steps of aldosterone biosynthesis. Genetic variability in CYP11B2 gene has been associated with heterogeneous aldosterone production, which can affect sodium homeostasis and thereby regulation of blood pressure. Hence, the present study was aimed to explore the single-locus variations, haplotype and epistasis patterns of CYP11B2 (C-344T, intron-2 gene conversion and Lys173Arg) gene polymorphisms, and the risk contributed by them to the development of essential hypertension (EHT)...
December 9, 2016: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/27935082/improved-separation-and-size-characterization-of-gold-nanoparticles-through-a-novel-capillary-zone-electrophoresis-method-using-poly-sodium4-styrenesulfonate-as-stabiliser-and-a-stepwise-field-strength-gradient
#14
Rosanna Ciriello, Pina Teresa Iallorenzi, Alessandro Laurita, Antonio Guerrieri
A novel Capillary Zone Electrophoresis (CZE) method was developed for an improved separation and size characterization of pristine gold nanoparticles (AuNP) using uncoated fused-silica capillaries with UV-Vis detection at 520 nm. To avoid colloid aggregation and/or adsorption during runs, poly(sodium 4-styrenesulfonate) (PSS) was added (1%, w/v) in the running buffer (CAPS 10 mM, pH 11). This polyelectrolyte conferred an enhanced stabilization to AuNP, both steric and electrostatic, exalting at the same time their differences in electrophoretic mobility...
December 9, 2016: Electrophoresis
https://www.readbyqxmd.com/read/27934887/aldosterone-induces-rapid-sodium-intake-by-a-nongenomic-mechanism-in-the-nucleus-tractus-solitarius
#15
Hu Qiao, Bo Hu, Hong Zhou, Jianqun Yan, Ru Jia, Bo Lu, Bo Sun, Xiao Luo, Yuanyuan Fan, Nan Wang
The purpose of this study was to determine whether aldosterone has a rapid action in the nucleus tractus solitarius (NTS) that increases sodium intake, and to examine whether this effect of aldosterone, if present, is mediated by G protein-coupled estrogen receptor (GPER). Adult male Sprague-Dawley rats with a stainless-steel cannula in the NTS were used. Aldosterone was injected into the NTS at the doses of 1, 5, 10 and 20 ng 0.1 μl(-1). A rapid dose-related increase of 0.3 M NaCl intake was induced within 30 min and this increase was not suppressed by the mineralocorticoid receptor (MR) antagonist spironolactone (10 ng 0...
December 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27934558/fibroblast-growth-factor-23-in-postrenal-transplant-an-often-forgotten-hormone
#16
Fateme Shamekhi Amiri, Mohammad Reza Khatami
Fibroblast growth factor 23 is likely to be the most important regulator of phosphate homeostasis, which mediates its functions through fibroblast growth factor receptors and the coreceptor Klotho. In addition to reducing expression of the sodium-phosphate cotransporters NPT2a and NPT2c in the proximal tubules, fibroblast growth factor 23 inhibits renal 1α-hydroxylase and stimulates 24-hydroxylase and appears to reduce parathyroid hormone secretion in short-term studies. Fibroblast growth factor 23 synthesis and secretion by osteocytes and osteoblasts are upregulated through 1,25-dihydroxyvitamin D3 and through an increased dietary phosphate intake...
December 2016: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/27934546/sodium-bicarbonate-ingestion-and-individual-variability-in-time-to-peak-ph
#17
Andy Sparks, Emily Williams, Amy Robinson, Peter Miller, David J Bentley, Craig Bridge, Lars R Mc Naughton
This study determined variability in time-to-peak pH after consumption of 300 mg kg(-)(1) of sodium bicarbonate. Seventeen participants (mean ± SD: age 21.38 ± 1.5 years; mass 75.8 ± 5.8 kg; height 176.8 ± 7.6 cm) reported to the laboratory where a resting capillary sample was taken. Then, 300 mg kg(-1) of NaHCO3 in 450 ml of flavoured water was ingested. Participants rested for 90 min and repeated blood samples were procured at 10 min intervals for 60 min and then every 5 min until 90 min...
December 9, 2016: Research in Sports Medicine
https://www.readbyqxmd.com/read/27934523/synergistic-growth-of-giant-wormlike-micelles-in-ternary-mixed-surfactant-solutions-effect-of-octanoic-acid
#18
Gergana S Georgieva, Svetoslav E Anachkov, Ingo Lieberwirth, Kaloian Koynov, Peter A Kralchevsky
The synergistic growth of giant wormlike micelles in ternary mixed solutions composed of an anionic surfactant (sodium laurylethersulfate, SLES), a zwitterionic surfactant (cocamidopropyl betaine, CAPB), and octanoic acid (HC8) is studied. Rheological data and their analysis in terms of Cole-Cole plots and micellar characteristic times are presented, and the micellar structures behind the observed rheological behavior are revealed by cryo-TEM micrographs. The surfactant composition is fixed near the maximal micelle size of the binary SLES + CAPB system, whereas the concentration of HC8 is varied...
December 6, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/27934488/sodium-hydroxide-catalyzed-dehydrocoupling-of-alcohols-with-hydrosilanes
#19
Anton A Toutov, Kerry N Betz, Michael C Haibach, Andrew M Romine, Robert H Grubbs
An O-Si bond construction protocol employing abundantly available and inexpensive NaOH as the catalyst is described. The method enables the cross-dehydrogenative coupling of an alcohol and hydrosilane to directly generate the corresponding silyl ether under mild conditions and without the production of stoichiometric salt byproducts. The scope of both coupling partners is excellent, positioning the method for use in complex molecule and materials science applications. A novel Si-based cross-coupling reagent is also reported...
November 18, 2016: Organic Letters
https://www.readbyqxmd.com/read/27934425/multiple-fluorine-substituted-phosphate-germanium-fluorides-and-their-thermal-stabilities
#20
Xia Huang, Biao Liu, Rong-Chuan Zhuang, Yuanming Pan, Jin-Xiao Mi, Ya-Xi Huang
Anhydrous compounds are crucially important for many technological applications, such as achieving high performance in lithium/sodium cells, but are often challenging to synthesize under hydrothermal conditions. Herein we report that a modified solvo-/hydro-fluorothermal method with fluoride-rich and water-deficient condition is highly effective for synthesizing anhydrous compounds by the replacement of hydroxyl groups and water molecules with fluorine. Two anhydrous phosphate germanium fluorides, namely, Na3[GeF4(PO4)] and K4[Ge2F9(PO4)], with chainlike structures involving multiple fluorine substitutions, were synthesized using the modified solvo-/hydro-fluorothermal method...
December 5, 2016: Inorganic Chemistry
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