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https://www.readbyqxmd.com/read/28917765/dihydropyridine-derived-bodipy-probe-for-detecting-exogenous-and-endogenous-nitric-oxide-in-mitochondria
#1
Chang Gao, Lan Lin, Wan Sun, Zheng-Li Tan, Jun-Ru Huang, Lan He, Zhong-Lin Lu
A mitochondria-targetable probe Mito-DHP for nitric oxide (NO) was designed and synthesized by introducing dihydropyridine and triphenylphosphonium (TPP) moieties into boron dipyrromethene (BODIPY) dye. Mito-DHP was able to effectively detect nitric oxide through the aromatization of dihydropyridine to fluorescent pyridine product under oxygen-free conditions. The probe Mito-DHP showed high selectivity to NO over a number of reactive oxygen/nitrogen species (ROS/RNS) as well as high sensitivity (detection limit at 25nM), pH stability and bio-compatibility...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28916494/transflammation-innate-immune-signaling-in-nuclear-reprogramming
#2
Shu Meng, Palas Chanda, Rajarajan A Thandavarayan, John P Cooke
Induction of pluripotency in somatic cells by retroviral overexpression of four transcription factors has revolutionized the field of stem cell biology and regenerative medicine. The efficient induction of pluripotency requires the activation of innate immune signaling in a process termed "transflammation" [1]. Specifically, the stimulation of pattern recognition receptors (PRRs) causes global alterations in the expression and activity of epigenetic modifiers to favor an open chromatin configuration. Activation of toll-like receptors (TLR) or RIG-1-like receptors (RLR) [2] trigger signaling cascades that result in NFκB or IRF-3 mediated changes in epigenetic plasticity that facilitate reprogramming...
September 12, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/28910805/infection-and-erosion-rates-in-trials-of-a-cranially-implanted-neurostimulator-do-not-increase-with-subsequent-neurostimulator-placements
#3
Peter B Weber, Ritu Kapur, Ryder P Gwinn, Richard S Zimmerman, Tracy A Courtney, Martha J Morrell
BACKGROUND/AIMS: The RNS® System utilizes a cranially implanted neurostimulator attached to leads placed at the seizure focus to provide brain responsive stimulation for the treatment of medically intractable partial onset epilepsy. Infection and erosion rates related to the cranial implant site were assessed overall and by neurostimulator procedure to determine whether rates increased with additional procedures. METHODS: Infection and erosion rates were calculated as (1) chance per neurostimulator procedure, (2) incidence per patient implant year, and (3) rates for initial and each subsequent neurostimulator implant (generalized estimating equation)...
September 15, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28902403/s-nitrosylation-denitrosylation-as-a-regulatory-mechanism-of-salt-stress-sensing-in-sunflower-seedlings
#4
Prachi Jain, Christine von Toerne, Christian Lindermayr, Satish C Bhatla
Nitric oxide (NO) and various reactive nitrogen species (RNS) produced in cells in normal growth conditions and their enhanced production under stress conditions, are responsible for a variety of biochemical aberrations. Present findings demonstrate that sunflower seedling roots exhibit high sensitivity to salt stress in terms of nitrite accumulation. A significant reduction in S-nitrosoglutathione reductase (GSNOR) activity is evident in response to salt stress. Restoration of GSNOR activity with dithioerythritol (DTT) shows that the enzyme is reversibly inhibited under conditions of 120 mM NaCl...
September 13, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28899725/nitric-oxide-donor-ru-terpy-bdq-no-3-induces-uncoupling-and-phosphorylation-of-endothelial-nitric-oxide-synthase-promoting-oxidant-production
#5
Simone R Potje, Zhenlong Chen, Suellen D'Arc S Oliveira, Lusiane M Bendhack, Roberto S da Silva, Marcelo G Bonini, Cristina Antoniali, Richard D Minshall
[Ru(terpy)(bdq)NO](3+) (TERPY) is a nitric oxide (NO) donor that promotes relaxation of the mesenteric artery and aorta in rats. We sought to investigate whether it acts as both an NO donor and endothelial NO synthase (eNOS) activator, as shown previously for nitroglycerin. Human umbilical vein endothelial cells (HUVECs) and human embryonic kidney 293 cells transfected with empty vector (HEK) or eNOS cDNA (HEK-eNOS) were treated with TERPY (1µM) for different lengths of time. eNOS expression, dimerization, and Ser(1177) phosphorylation, caveolin-1 (Cav-1) oligomerization, Cav-1 Tyr(14) phosphorylation were evaluated by Western blotting...
September 9, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28895967/scavenging-activity-of-magn%C3%A3-li-phases-as-a-function-of-ti-4-ti-3-ratios
#6
M Canillas, E Chinarro, A P Pêgo, B Moreno
TiO2 is able to scavenge reactive oxygen and nitrogen species (ROS and RNS) in the absence of light. The scavenging mechanism has been related to the chemistry of defects (oxygen vacancy reduced oxidation states of Ti) but it is still unknown. This study describes the ROS scavenging activity of different titanium oxide phases and relates their scavenging activities with the Ti(4+)/Ti(3+) molar ratio as well as the band gap value. The Ti5O9 phase, with a mixture of both oxidation states, presented a substantially higher percentage of 2,2-diphenyl-1-picrylhydracyl radicals (DPPH˙) eliminated per m(2) of specific surface area in comparison to phases with predominant oxidation states Ti(4+) or Ti(3+) such as TiO2 and Ti2O3, respectively...
September 12, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28894510/antioxidant-and-anti-inflammatory-effects-of-shungite-against-ultraviolet-b-irradiation-induced-skin-damage-in-hairless-mice
#7
Ma Easter Joy Sajo, Cheol-Su Kim, Soo-Ki Kim, Kwang Yong Shim, Tae-Young Kang, Kyu-Jae Lee
As fullerene-based compound applications have been rapidly increasing in the health industry, the need of biomedical research is urgently in demand. While shungite is regarded as a natural source of fullerene, it remains poorly documented. Here, we explored the in vivo effects of shungite against ultraviolet B- (UVB-) induced skin damage by investigating the physiological skin parameters, immune-redox profiling, and oxidative stress molecular signaling. Toward this, mice were UVB-irradiated with 0.75 mW/cm(2) for two consecutive days...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28893120/increasing-value-adding-patient-care-by-applying-a-modified-tcab-program
#8
Tuula Antinaho, Tuula Kivinen, Hannele Turunen, Pirjo Partanen
Purpose The purpose of this study is to evaluate a development process aimed at increasing registered nurses' (RNs) working time use in value-adding patient care by applying a modified Transforming Care at the Bedside (TCAB) program at inpatient units of two tertiary hospitals. Design/methodology/approach Basic data for the development process were collected on RNs' working time use via external observation in 2011 (RNs = 113). Nursing work was redesigned and implemented by 12 multi-professional teams during 2012-2013...
September 12, 2017: Leadership in Health Services
https://www.readbyqxmd.com/read/28891317/the-role-of-sirtuins-in-antioxidant-and-redox-signaling
#9
Chandra K Singh, Gagan Chhabra, Mary Ndiaye, Liz Mariely Garcia-Peterson, Nicholas John Mack, Nihal Ahmad
SIGNIFICANCE: Antioxidant and redox signaling (ARS) events are regulated by critical molecules that modulate antioxidants, reactive oxygen or nitrogen species (ROS/RNS) and/or oxidative stress within the cell. Imbalances in these molecules can disturb cellular functions to become pathogenic. Sirtuins serve as important regulators of ARS in cells. Recent Advances: Sirtuins (SIRTs 1-7) are a family of nicotinamide adenine dinucleotide (NAD)-dependent histone deacetylases with the ability to deacetylate histone and non-histone targets...
September 11, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28881698/reduction-oxidation-pathways-involved-in-cancer-development-a-systematic-review-of-literature-reviews
#10
REVIEW
Xīn Gào, Ben Schöttker
Oxidative stress results from an imbalance of the reactive oxygen species/reactive nitrogen species (ROS/RNS) production and the oxidants defense system. Extensive research during the last decades has revealed that oxidative stress can mediate cancer initiation and development by leading not only to molecular damage but also to a disruption of reduction-oxidation (redox) signaling. In order to provide a global overview of the redox signaling pathways, which play a role in cancer formation, we conducted a systematic literature search in PubMed and ISI Web of Science and identified 185 relevant reviews published in the last 10 years...
August 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28878685/oxidative-stress-mediated-atherosclerosis-mechanisms-and-therapies
#11
REVIEW
Xinyu Yang, Yang Li, Yanda Li, Xiaomeng Ren, Xiaoyu Zhang, Dan Hu, Yonghong Gao, Yanwei Xing, Hongcai Shang
Atherogenesis, the formation of atherosclerotic plaques, is a complex process that involves several mechanisms, including endothelial dysfunction, neovascularization, vascular proliferation, apoptosis, matrix degradation, inflammation, and thrombosis. The pathogenesis and progression of atherosclerosis are explained differently by different scholars. One of the most common theories is the destruction of well-balanced homeostatic mechanisms, which incurs the oxidative stress. And oxidative stress is widely regarded as the redox status realized when an imbalance exists between antioxidant capability and activity species including reactive oxygen (ROS), nitrogen (RNS) and halogen species, non-radical as well as free radical species...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28876437/predictors-of-persistence-and-success-in-an-accelerated-online-rn-to-bsn-program
#12
Daisha Jane Cipher, Mary E Mancini, Sachin Shrestha
BACKGROUND: To meet the increasing demand for RNs to further their education, many colleges of nursing have developed RN-to-baccalaureate nursing (BSN) programs, many of which are delivered online. A better understanding of the demographic and academic characteristics and outcomes of individuals enrolled in online RN-to-BSN programs is needed. METHOD: This article reports a retrospective predictive analysis of 9,567 students enrolled in an online RN-to-BSN program...
September 1, 2017: Journal of Nursing Education
https://www.readbyqxmd.com/read/28875952/role-of-r-e-n-a-l-nephrometry-score-in-laparoscopic-partial-nephrectomy
#13
Hai-Jiang Zhou, Yong Yan, Jian-Zhong Zhang, Li-Rong Liang, Shu-Bin Guo
Background: Preoperative anatomical scoring system is conducive to comparison between treatment options and evaluation of postoperative outcomes in patients with small renal tumors. This study aimed to evaluate the clinical application efficacy of the R.E.N.A.L. nephrometry score (RNS) in predicting perioperative outcomes in patients with renal tumor who underwent laparoscopic partial nephrectomy (LPN). Methods: The clinical data of 139 patients with renal tumors who underwent LPN between 2009 and 2015 were collected and analyzed...
September 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28874447/salmonella-utilizes-zinc-to-subvert-anti-microbial-host-defense-of-macrophages-via-modulation-of-nf-%C3%AE%C2%BAb-signaling
#14
Aimin Wu, Piotr Tymoszuk, David Haschka, Simon Heeke, Stefanie Dichtl, Verena Petzer, Markus Seifert, Richard Hilbe, Sieghart Sopper, Heribert Talasz, Dirk Bumann, Cornelia Lass-Flörl, Igor Theurl, Keying Zhang, Guenter Weiss
Zinc sequestration by macrophages is considered a crucial host defense strategy against infection with the intracellular bacterium Salmonella Typhimurium. However, the underlying mechanisms remain elusive. In this study we found zinc to favor pathogen survival within macrophages. Salmonella-hosting macrophages contained higher free zinc levels than uninfected macrophages and cells that successfully eliminated bacteria, which was paralleled by impaired production of reactive oxygen (ROS) and nitrogen (RNS) species in bacteria-harboring cells...
September 5, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28873466/rational-design-of-drug-like-compounds-targeting-mycobacterium-marinum-melf-protein
#15
Renu Dharra, Sakshi Talwar, Yogesh Singh, Rani Gupta, Jeffrey D Cirillo, Amit K Pandey, Mahesh Kulharia, Promod K Mehta
The mycobacterial mel2 locus (mycobacterial enhanced infection locus, Rv1936-1941) is Mycobacterium marinum and M. tuberculosis specific, which can withstand reactive oxygen species (ROS) and reactive nitrogen species (RNS) induced stress. A library of over a million compounds was screened using in silico virtual ligand screening (VLS) to identify inhibitors against the modeled structure of MelF protein expressed by melF of mel2 locus so that M. marinum's ability to withstand ROS/RNS stress could be reduced...
2017: PloS One
https://www.readbyqxmd.com/read/28873463/effects-of-antimony-on-redox-activities-and-antioxidant-defence-systems-in-sunflower-helianthus-annuus-l-plants
#16
Alfonso Ortega, Inmaculada Garrido, Ilda Casimiro, Francisco Espinosa
The alterations induced by the toxicity of antimony (Sb) in the roots and leaves of sunflower plants were determined. The plants were grown hydroponically with different concentrations of Sb, a heavy metal which reduces biomass production and growth. There was preferential accumulation of Sb in the tissues of the roots, with the concentrations in the leaves being much lower. The accumulation of other mineral elements was also altered, especially that of Fe and Zn. Chlorophyll content declined, as also did the photosynthetic efficiency, but the carotenoid content remained unaltered...
2017: PloS One
https://www.readbyqxmd.com/read/28869697/comfort-supporting-nursing-activities-for-end-of-life-patients-in-an-institutionalized-environment
#17
Helena Kisvetrová, Šárka Vévodová, David Školoudík
PURPOSE: Comfort promotion plays a significant role in end-of-life patient care. The objective of this study was to determine the utilization rate of comfort supporting nursing activities in end-of-life patients in an institutionalized environment in the Czech Republic in relation to the age of the registered nurses (RNs), length of work experience, education level, and type of workplace. DESIGN: A cross-sectional, descriptive study was designed. A questionnaire with Likert scales included 31 activities of dying care and spiritual support interventions...
September 4, 2017: Journal of Nursing Scholarship
https://www.readbyqxmd.com/read/28868268/effect-of-concentrated-apple-extract-on-experimental-colitis-induced-by-acetic-acid
#18
Maurício Mercaldi Pastrelo, Carla Caroline Dias Ribeiro, Joselmo Willamys Duarte, Andréa Pitelli Bioago Gollücke, Ricardo Artigiani-Neto, Daniel Araki Ribeiro, Sender Jankiel Miszputen, Celina Tizuko Fujiyama Oshima, Ana Paula Ribeiro Paiotti
Reactive oxygen and nitrogen species (ROS/RNS) play a crucial role in inflammatory bowel disease (IBD) exacerbating the chronic inflammatory process. Endogenous and diet antioxidants can neutralize these compounds. The apple is widely consumed, with several antioxidant activity compounds. The present study evaluated the effects of concentrated apple extract (CAE) in acetic acid induced colitis. 29 Wistar male rats were randomized into 5 groups. G1-Sham/saline solution, G2-CAE/control, G3-acetic acid/control, G4-curative- CAE treatment and G5-preventive-CAE treatment...
2017: International Journal of Molecular and Cellular Medicine
https://www.readbyqxmd.com/read/28866748/early-response-of-glutathione-and-thioredoxin-dependent-antioxidant-defense-systems-to-tl-i-and-tl-iii-mediated-oxidative-stress-in-adherent-pheochromocytoma-pc12adh-cells
#19
Lis C Puga Molina, Damiana M Salvatierra Fréchou, Sandra V Verstraeten
Thallium (Tl) is a toxic heavy metal that causes oxidative stress both in vitro and in vivo. In this work, we evaluated the production of oxygen (ROS)- and nitrogen (RNS)-reactive species in adherent PC12 (PC12adh) cells exposed for 0.5-6 h to Tl(I) or Tl(III) (10-100 µM). In this system, Tl(I) induced mostly H2O2 generation while Tl(III) induced H2O2 and ONOO(·-) generation. Both cations enhanced iNOS expression and activity, and decreased CuZnSOD expression but without affecting its activity. Tl(I) increased MnSOD expression and activity but Tl(III) decreased them...
September 2, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28865633/guideline-implementation-positioning-the-patient
#20
Byron L Burlingame
Every surgical procedure requires positioning the patient; however, all surgical positions are associated with the potential for the patient to experience a positioning injury. The locations and types of potential injuries (eg, stretching, compression, pressure injury) depend on the position. Factors that may increase the patient's risk for an injury are the length of the procedure and risk factors inherent to the patient (eg, weight, age, frailty). AORN's updated "Guideline for positioning the patient" provides guidance on injury prevention practices for all surgical positions including supine, Trendelenburg, reverse Trendelenburg, lateral, lithotomy, prone, and sitting positions and modifications of these positions...
September 2017: AORN Journal
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