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https://www.readbyqxmd.com/read/29783215/the-changes-of-some-bioregulators-and-gas-transmitters-in-patients-with-hypertonic-disease-under-the-influence-of-physical-loading
#1
Iryna S Dronyk, Ostap H Yavorsky, Olexandr Y Sklyarov
OBJECTIVE: Introduction: Nowadays arterial hypertension is supposed to be a pathogenetic factor of numerous cardiovascular diseases (CVD) and 18% cases of the preterm death. Due to the data of the American Heart Association in 77% of patients, who had stroke, the arterial pressure overexceeded 140/90 mm Hg. In Ukraine, according to the epidemiologic study more than 1/3 of the population have increased arterial pressure. One of the extremely important aspects of struggle with CVD is diagnosis and prevention of hypertonic disease...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29780560/counting-charges-on-membrane-bound-peptides
#2
Alicia C McGeachy, Emily R Caudill, Dongyue Liang, Qiang Cui, Joel A Pedersen, Franz M Geiger
Quantifying the number of charges on peptides bound to interfaces requires reliable estimates of (i) surface coverage and (ii) surface charge, both of which are notoriously difficult parameters to obtain, especially at solid/water interfaces. Here, we report the thermodynamics and electrostatics governing the interactions of l-lysine and l-arginine octamers (Lys8 and Arg8 ) with supported lipid bilayers prepared from a 9 : 1 mixture of 1,2-dimyristoyl- sn-glycero -3-phosphocholine (DMPC) and 1,2-dimyristoyl- sn -glycero-3-phospho-(1'-rac-glycerol) (sodium salt) (DMPG) from second harmonic generation (SHG) spectroscopy, quartz crystal microbalance with dissipation monitoring (QCM-D) and nanoplasmonic sensing (NPS) mass measurements, and atomistic simulations...
May 14, 2018: Chemical Science
https://www.readbyqxmd.com/read/29780000/the-effects-of-proton-pump-inhibitor-on-hepatic-vascular-responsiveness-and-hemodynamics-in-cirrhotic-rats
#3
I-Fang Hsin, Shao-Jung Hsu, Chiao-Lin Chuang, Teh-Ia Huo, Hui-Chun Huang, Fa-Yauh Lee, Hsin-Ling Ho, Shu-Yu Chang, Shou-Dong Lee
BACKGROUND: Liver cirrhosis is associated with increased intrahepatic resistance due to hepatic fibrosis and exaggerated vasoconstriction. Recent studies have indicated that proton pump inhibitors (PPIs), in addition to acid suppression, modulate vasoactive substances and vasoresponsiveness. PPIs are frequently prescribed in patients with cirrhosis due to a higher prevalence of peptic ulcers, however other impacts are unknown. METHODS: Liver cirrhosis was induced in Sprague-Dawley rats with common bile duct ligation (BDL)...
May 17, 2018: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29778449/mechanisms-underlying-the-relaxation-by-a484954-a-eukaryotic-elongation-factor-2-kinase-inhibitor-in-rat-isolated-mesenteric-artery
#4
Tomoko Kodama, Muneyoshi Okada, Hideyuki Yamawaki
Eukaryotic elongation factor 2 kinase (eEF2K) is a calmodulin-related protein kinase which regulates protein translation. A484954 is an inhibitor of eEF2K. In the present study, we investigated the acute effects of A484954 on contractility of isolated blood vessels. Isometric contraction of rat isolated aorta and main branch of superior mesenteric artery (MA) was measured. Expression of an inward rectifier K+ (Kir ) channel subtype mRNA and protein was examined. A484954 caused relaxation in endothelium-intact [E (+)] and -denuded [E (-)] aorta or MA precontracted with noradrenaline (NA)...
May 2, 2018: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/29775316/l-arginine-catalyzed-synthesis-of-nanometric-organosilica-particles-through-a-waterborne-sol-gel-process-and-their-porous-structure-analysis
#5
Xiaoguang Qiao, Pierre-Yves Dugas, Laurent Veyre, Elodie Bourgeat-Lami
We report an efficient and easy to implement waterborne sol-gel process for the synthesis of nanometric organosilica particles. In this process, tetraethyl orthosilicate (TEOS) and 3-(methacryloxy)propyl trimethoxy silane (γ-MPS), employed as silica sources, are heterogeneously delivered in an aqueous solution of L-arginine, a basic amino acid used as catalyst, from a top organic layer. Co-condensation of TEOS with γ-MPS led to organosilica particles with diameters comprised between 30 and 230 nm when increasing the γ-MPS content from 0 to 10...
May 18, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29774505/mitigating-peroxynitrite-mediated-mitochondrial-dysfunction-in-aged-rat-brain-by-mitochondria-targeted-antioxidant-mitoq
#6
Arpan Kumar Maiti, B C Spoorthi, Nimai Chandra Saha, Ashis Kumar Panigrahi
Although reactive oxygen species mediated oxidative stress is a well-documented mechanism of aging, recent evidences indicate involvement of nitrosative stress in the same. As mitochondrial dysfunction is considered as one of the primary features of aging, the present study was designed to understand the involvement of nitrosative stress by studying the impact of a mitochondria-targeted antioxidant MitoQ, a peroxynitrite (ONOO- ) scavenger, on mitochondrial functions. Four groups of rats were included in this study: Group I: Young-6 months (-MitoQ), Group II: Aged-22 months (- MitoQ), Group III: Young-6 months (+ MitoQ), Group IV: Aged-22 months (+ MitoQ)...
May 17, 2018: Biogerontology
https://www.readbyqxmd.com/read/29774240/mannan-induced-nos2-in-macrophages-enhances-il-17-driven-psoriatic-arthritis-by-innate-lymphocytes
#7
Jianghong Zhong, Tatjana Scholz, Anthony C Y Yau, Simon Guerard, Ulrike Hüffmeier, Harald Burkhardt, Rikard Holmdahl
Previous identification of the inducible nitric oxide synthase (NOS2) gene as a risk allele for psoriasis (Ps) and psoriatic arthritis (PsA) suggests a possible pathogenic role of nitric oxide (NO). Using a mouse model of mannan-induced Ps and PsA (MIP), where macrophages play a regulatory role by releasing reactive oxygen species (ROS), we found that NO was detectable before disease onset in mice, independent of a functional nicotinamide adenine dinucleotide phosphate oxidase 2 complex. MIP was suppressed by either deletion of Nos2 or inhibition of NO synthases with NG-nitro-l-arginine methyl ester, demonstrating that Nos2-derived NO is pathogenic...
May 2018: Science Advances
https://www.readbyqxmd.com/read/29773582/activation-of-large-conductance-calcium-activated-k-channels-by-nitric-oxide-mediates-apelin-induced-relaxation-of-coronary-arteries
#8
Amreen Mughal, Chengwen Sun, Stephen T O'Rourke
Apelin increases coronary blood flow, cardiac contractility and cardiac output. Based on these favorable hemodynamic effects, apelin and apelin-like analogs are being developed for treating heart failure and related disorders; however, the molecular mechanisms underlying apelin-induced coronary vasodilation are unknown. This study aimed to elucidate the signaling pathways by which apelin causes smooth muscle relaxation in coronary arteries. Receptors for apelin (APJ receptors) were expressed in coronary arteries, as determined by Western blot and PCR analyses...
May 17, 2018: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/29773191/anti-inflammatory-and-antinociceptive-effects-of-2-2-dipyridyl-diselenide-through-reduction-of-inducible-nitric-oxide-synthase-nuclear-factor-kappa-b-and-c-jun-n-terminal-kinase-phosphorylation-levels-in-the-mouse-spinal-cord
#9
Suzan Gonçalves Rosa, César Augusto Brüning, Ana Paula Pesarico, Ana Cristina Guerra de Souza, Cristina Wayne Nogueira
Appropriate treatment of pain requires analgesics and anti-inflammatory drugs generally associated with undesirable side effects and not fully effective in a significant proportion of patients. Organoselenium compounds elicit a plenty of pharmacological effects in different animal models. Among these compounds, the 2,2`-dipyridyl diselenide (DPD) has a potent antioxidant effect and low toxicity. In this way, the aim of this study was to investigate the possible DPD antinociceptive effect and its mechanism of action, as well as the safety of the compound...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29773079/effects-of-linagliptin-on-endothelial-function-and-postprandial-lipids-in-coronary-artery-disease-patients-with-early-diabetes-a-randomized-placebo-controlled-double-blind-trial
#10
Norbert J Tripolt, Felix Aberer, Regina Riedl, Jasmin Url, Gudrun Dimsity, Andreas Meinitzer, Tatjana Stojakovic, Faisal Aziz, Ronald Hödl, Gabriele Brachtl, Dirk Strunk, Marianne Brodmann, Franz Hafner, Harald Sourij
BACKGROUND: Early glucose lowering intervention in subjects with type 2 diabetes mellitus was demonstrated to be beneficial in terms of micro- and macrovascular risk reduction. However, most of currently ongoing cardiovascular outcome trials are performed in subjects with manifest atherosclerosis and long-standing diabetes. Therefore, the aim of this study is to investigate the effects of the dipeptidylpeptidase-4 inhibitor linagliptin in subjects with coronary artery disease (CAD) but early type 2 diabetes mellitus (T2DM) on a set of cardiovascular surrogate measurements...
May 17, 2018: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/29772534/trapping-methods-for-probing-functional-intermediates-in-nitric-oxide-synthases-and-related-enzymes
#11
Tobias Michael Hedison, Sam Hay, Nigel Shaun Scrutton
The three mammalian isoforms of nitric oxide synthase (NOS) produce the signalling molecule nitric oxide (NO) from L-arginine, molecular oxygen, and NADPH. NOS-generated NO is essential for many key biochemical processes and aberrant NO production is linked to the pathophysiology of many diseases. Over the past 40 years, the mechanism and structure of NOS have been studied extensively and there are many quality reviews and perspectives documenting the current hypotheses in the field. In this review, as an alternative perspective, we will describe some novel techniques and methodologies that have been used to trap functionally relevant conformational and kinetic states in the catalytic cycles of NOS and some structurally related diflavin oxidoreductase...
June 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/29770514/influence-of-heat-treatment-on-loading-of-polymeric-multilayer-microcapsules-with-rhodamine-b
#12
Alexey V Ermakov, Olga A Inozemtseva, Dmitry A Gorin, Gleb B Sukhorukov, Sergei Belyakov, Maria N Antipina
Layer-by-layer assembled polymeric multilayer capsules (PMC) of micrometer sizes are permeable for molecules below 1 KDa; therefore, the efficacy of such capsules in the delivery of low molecular weight water soluble bioactive compounds and drugs is frequently challenged. Thermally induced contraction of hollow PMC is explored here to enhance their loading efficacy with model compound, fluorescent rhodamine B (RhB). Four bilayered capsules obtained of poly(diallyldimethylammonium chloride)/polystyrene sulfonate ([PDADMAC/PSS]4 ) or poly-l-arginine/dextran sulfate ([PARG/DS]4 ) on sacrificial CaCO3 spherical microparticles are postloaded with RhB at ambient or elevated temperatures...
May 16, 2018: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/29769708/maternal-supraphysiological-hypercholesterolemia-associates-with-endothelial-dysfunction-of-the-placental-microvasculature
#13
Bárbara Fuenzalida, Bastián Sobrevia, Claudette Cantin, Lorena Carvajal, Rocío Salsoso, Jaime Gutiérrez, Susana Contreras-Duarte, Luis Sobrevia, Andrea Leiva
Maternal physiological or supraphysiological hypercholesterolemia (MPH, MSPH) occurs during pregnancy. MSPH is associated with foetal endothelial dysfunction and atherosclerosis. However, the potential effects of MSPH on placental microvasculature are unknown. The aim of this study was to determine whether MSPH alters endothelial function in the placental microvasculature both ex vivo in venules and arterioles from the placental villi and in vitro in primary cultures of placental microvascular endothelial cells (hPMEC)...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29768248/bisphenol-a-decreases-the-spontaneous-contractions-of-rat-uterus-in-vitro-through-a-nitrergic-mechanism
#14
Hemlata Gupta, Shripad B Deshpande
BACKGROUND: Bisphenol A (BPA), a chemical used in the manufacture of plastics, has toxic effects on various systems of the human body including the reproductive system. BPA possesses estrogenic activity and is implicated in altering oogenesis, ovulation, and fertility. In addition to ovulatory changes, uterine contractility is an important factor for fertility. However, the effects of BPA on myometrial contractions are not known. Therefore, we examined the effect of BPA on rat uterine contractions...
May 16, 2018: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/29766980/ripasudil-attenuates-lipopolysaccharide-lps-mediated-apoptosis-and-inflammation-in-pulmonary-microvascular-endothelial-cells-via-rock2-enos-signaling
#15
Jianxin Yang, Feng Ruan, Zhongjun Zheng
BACKGROUND Microvascular endothelial inflammation and apoptosis are responsible for septic acute lung injury (ALI). Ripasudil is a novel Rho/Rho kinase (ROCK) inhibitor which shows therapeutic effects on several vascular diseases. The aim of this study was to investigate the protective effects and correlated molecular mechanisms of ripasudil on lipopolysaccharide- induced inflammation and apoptosis of pulmonary microvascular endothelial cells (PMVECs). MATERIAL AND METHODS Cultured PMVECs were exposed to lipopolysaccharide (LPS)...
May 16, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29759075/metabolic-profiles-in-community-acquired-pneumonia-developing-assessment-tools-for-disease-severity
#16
Pu Ning, Yali Zheng, Qiongzhen Luo, Xiaohui Liu, Yu Kang, Yan Zhang, Rongbao Zhang, Yu Xu, Donghong Yang, Wen Xi, Keqiang Wang, Yusheng Chen, Shuchang An, Zhancheng Gao
BACKGROUND: This study aimed to determine whether community-acquired pneumonia (CAP) had a metabolic profile and whether this profile can be used for disease severity assessment. METHODS: A total of 175 individuals including 119 CAP patients and 56 controls were enrolled and divided into two cohorts. Serum samples from a discovery cohort (n = 102, including 38 non-severe CAP, 30 severe CAP, and 34 age and sex-matched controls) were determined by untargeted ultra-high-performance liquid chromatography with tandem mass spectrometry (LC-MS/MS)-based metabolomics...
May 14, 2018: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/29758543/magnesium-sulfate-versus-esomeprazole-impact-on-the-neonates-of-preeclamptic-rats
#17
Amani N Shafik, Mahmoud A Khattab, Ahmed H Osman
OBJECTIVE: Preeclampsia represents a major complication of pregnancy, associated with greater maternal and fetal complications. We compared the effects of esomeprazole (a proton pump inhibitor) and magnesium sulfate (MgSO4) on the deleterious effects observed on the mother and neonates in experimentally induced preeclampsia in rats. STUDY DESIGN: Preeclampsia was induced in pregnant rats with NG-nitro-l-arginine methyl ester (L-NAME) starting from day 10-till end of pregnancy...
May 8, 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29756286/rapid-and-quantitative-chemical-exchange-saturation-transfer-cest-imaging-with-magnetic-resonance-fingerprinting-mrf
#18
Ouri Cohen, Shuning Huang, Michael T McMahon, Matthew S Rosen, Christian T Farrar
PURPOSE: To develop a fast magnetic resonance fingerprinting (MRF) method for quantitative chemical exchange saturation transfer (CEST) imaging. METHODS: We implemented a CEST-MRF method to quantify the chemical exchange rate and volume fraction of the Nα -amine protons of L-arginine (L-Arg) phantoms and the amide and semi-solid exchangeable protons of in vivo rat brain tissue. L-Arg phantoms were made with different concentrations (25-100 mM) and pH (pH 4-6)...
May 13, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29754056/nitric-oxide-is-involved-in-the-hypothyroidism-with-significant-morphology-changes-in-female-wistar-rats-induced-by-chronic-exposure-to-high-water-iodine-from-potassium-iodate
#19
Shengzhong Rong, Yanhui Gao, Yanmei Yang, Hanwen Shao, Akinkunmi Paul Okekunle, Chunpeng Lv, Yang Du, Hongna Sun, Yuting Jiang, Gottfried M Darko, Dianjun Sun
Epidemiological studies indicated that chronic exposure to high water iodine is associated with primary hypothyroidism (PH) and subclinical hypothyroidism (SCH). However, the mechanism is not well understood. In this study, we explored whether chronic exposure to high water iodine from potassium iodate (KIO3 ) can induce hypothyroidism in addition to determining if nitric oxide (NO) is involved in the pathogenesis. 96 female Wistar rats were divided into six groups: control, I1000μg/L , I3000μg/L , I6000μg/L , N-nitro-L-arginine methylester (L-NAME) and L-NAME+I6000μg/L ...
May 3, 2018: Chemosphere
https://www.readbyqxmd.com/read/29753173/comparative-effects-of-avocado-oil-and-losartan-on-blood-pressure-renal-vascular-function-and-mitochondrial-oxidative-stress-in-hypertensive-rats
#20
Cristian Adrián Márquez-Ramírez, José Lucio Hernández de la Paz, Omar Ortiz-Avila, Andrés Raya-Farias, Juan Carlos González-Hernández, Alain Raimundo Rodríguez-Orozco, Rafael Salgado-Garciglia, Alfredo Saavedra-Molina, Daniel Godínez-Hernández, Christian Cortés-Rojo
OBJECTIVE: Angiotensin II (Ang-II) antagonism alleviates hypertensive kidney damage by improving mitochondrial function and decreasing oxidative stress. This condition also is associated with altered renal vascular tone due to enhanced constriction by Ang-II. Thus, approaches ameliorating these events are desirable to alleviate kidney damage. Avocado oil, a source of antioxidants and oleic acid, is known to improve mitochondrial function, while oleic acid has antihypertensive effects...
March 20, 2018: Nutrition
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