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(NOS)and(nitric oxide synthase)

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https://www.readbyqxmd.com/read/28526706/cardiac-hyporesponsiveness-in-severe-sepsis-is-associated-with-nitric-oxide-dependent-activation-of-g-protein-receptor-kinase
#1
Daniela Dal-Secco, Silvia DalBó, Natalia E S Lautherbach, Fábio N Gava, Mara Rubia Nunes Celes, Patricia Oliveira Benedet, Adriana H Souza, Juliana Akinaga, Vanessa Lima, Katiussia P Silva, Luiz Ricardo A Kiguti, Marcos A Rossi, Isis do Carmo Kettelhut, André Sampaio Pupo, Fernando Queiroz Cunha, Jamil Assreuy
G protein-coupled receptor kinase isoform 2 (GRK2) has a critical role in physiological and pharmacological responses to endogenous and exogenous substances. Sepsis causes an important cardiovascular dysfunction in which nitric oxide (NO) has a relevant role. The present study aimed to assess the putative effect of inducible NO synthase (NOS-2)-derived NO on the activity of GRK2 in the context of septic cardiac dysfunction. C57BL/6 mice were submitted to severe septic injury by cecal ligation and puncture (CLP)...
May 19, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28523794/mineralocorticoid-receptor-associates-with-pro-inflammatory-bias-in-hippocampus-of-spontaneously-hypertensive-rats
#2
María Elvira Brocca, Luciana Pietranera, Maria Meyer, Analia Lima, Paulina Roig, E Ronald de Kloet, Alejandro F De Nicola
Damage observed in the hippocampus of the adult spontaneously hypertensive rat (SHR) resembles the neuropathology of mineralocorticoid-induced hypertension, supporting a similar endocrine dysfunction in both entities. In this study we have tested the hypothesis that increased expression of the hippocampal mineralocorticoid receptor (MR) in SHR animals is associated with a prevalent expression of pro-inflammatory over anti-inflammatory factors. For this purpose we measured in hippocampus mRNA expression and immunoreactivity of the MR and the glucocorticoid receptor (GR) using qPCR and histochemistry...
May 18, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/28515682/nitric-oxide-synthase-inhibitor-attenuates-the-effects-of-repeated-restraint-stress-on-synaptic-transmission-in-the-paraventricular-nucleus-of-the-rat-hypothalamus
#3
Magdalena Kusek, Anna Tokarska, Marcin Siwiec, Anna Gadek-Michalska, Bernadeta Szewczyk, Grzegorz Hess, Krzysztof Tokarski
Corticotropin-releasing hormone (CRH)-synthesizing parvocellular neuroendocrine cells (PNCs) of the hypothalamic paraventricular nucleus (PVN) play a key role in the activation of the hypothalamic-pituitary-adrenocortical (HPA) axis. Several studies have demonstrated that synaptic inputs to these cells may undergo stress-related enhancement but, on the other hand, it has been reported that exposition to the same stressor for prolonged time periods may induce a progressive reduction in the response of the HPA axis to homotypic stressors...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28515388/nitric-oxide-is-critical-for-avoiding-hepatic-lipid-overloading-via-il6-induction-during-liver-regeneration-after-partial-hepatectomy-in-mice
#4
Yue Yu, Miho Tamai, Yoh-Ichi Tagawa
Nitric oxide (NO), generated from L-arginine by three different isoforms of nitric oxide synthase (NOS), is a pleiotropic factor to regulate physiological functions in almost every organ and tissue. Each knockout mouse of iNOS or eNOS has been used to suggest that NO has a crucial role in liver regeneration after partial hepatectomy (PH), for NO may inhibit caspase 3 activity and is required for EGFR signaling. In previous reports, defective mitochondrial β-oxidation was observed in eNOS KO mice, and hepatic steatosis was often correlated to deficient liver regeneration, so we focused on metabolic perspective and hypothesized that NO depletion in PH mice would affect hepatocytic lipolysis and impair hepatocytes proliferation...
May 18, 2017: Experimental Animals
https://www.readbyqxmd.com/read/28515175/role-for-reactive-oxygen-species-in-flow-stimulated-inner-medullary-collecting-duct-endothelin-1-production
#5
Will Wheatley, Donald E Kohan
Inner medullary collecting duct (IMCD)-derived endothelin-1 (ET-1) is stimulated by volume expansion, in part through augmented luminal flow, whereupon it can elicit natriuresis and diuresis. Since flow can alter nitric oxide (NO) and reactive oxygen species (ROS), both of which can affect collecting duct salt transport, we asked whether NO and/or ROS mediate flow-stimulated IMCD ET-1. Mouse IMCD3 cells were exposed to flow and ET-1/GAPDH mRNA assessed. A shear stress of 10 dyne/cm2 for 1 hr increased ET-1 mRNA by 4-fold compared to no flow (ET-1 flow response)...
May 17, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28508586/role-and-regulation-of-autophagy-and-apoptosis-by-nitric-oxide-in-hepatic-stellate-cells-during-acute-liver-failure
#6
Li Jin, Heng Gao, JiuPing Wang, ShuJuan Yang, Jing Wang, JingFeng Liu, Yuan Yang, TaoTao Yan, Tianyan Chen, Yingren Zhao, Yingli He
BACKGROUND & AIMS: We previously found that hepatic stellate cell (HSC) activation induced by autophagy maintains the liver architecture to prevent collapse during acute liver failure (ALF). Nitric oxide (NO) has shown to induce HSC apoptosis. Whether and how NO is involved in ALF and autophagy remains unclear. METHODS: ALF patients were recruited to investigate the correlation between plasma NO levels and clinical features. Liver tissues were collected from chronic hepatitis patients by biopsy and from ALF patients who had undergone liver transplantation...
May 15, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28507519/vasorelaxing-action-of-the-kynurenine-metabolite-xanthurenic-acid-the-missing-link-in-endotoxin-induced-hypotension
#7
Francesco Fazio, Albino Carrizzo, Luana Lionetto, Antonio Damato, Luca Capocci, Mariateresa Ambrosio, Giuseppe Battaglia, Valeria Bruno, Michele Madonna, Maurizio Simmaco, Ferdinando Nicoletti, Carmine Vecchione
The kynurenine pathway of tryptophan metabolism is activated by pro-inflammatory cytokines. L-kynurenine, an upstream metabolite of the pathway, acts as a putative endothelium-derived relaxing factor, and has been hypothesized to play a causative role in the pathophysiology of inflammation-induced hypotension. Here, we show that xanthurenic acid (XA), the transamination product of 3-hydroxykynurenine, is more efficacious than L-kynurenine in causing relaxation of a resistance artery, but fails to relax pre-contracted aortic rings...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28503149/vascular-kinin-b1-and-b2-receptors-determine-endothelial-dysfunction-through-neuronal-nitric-oxide-synthase
#8
Thássio R R Mesquita, Gianne P Campos-Mota, Virgínia S Lemos, Jader S Cruz, Itamar C G de Jesus, Enilton A Camargo, Jorge L Pesquero, João B Pesquero, Luciano Dos Santos A Capettini, Sandra Lauton-Santos
B1- and B2-kinin receptors are G protein-coupled receptors that play an important role in the vascular function. Therefore, the present study was designed to evaluate the participation of kinin receptors in the acetylcholine (ACh)-induced vascular relaxation, focusing on the protein-protein interaction involving kinin receptors with endothelial and neuronal nitric oxide synthases (eNOS and nNOS). Vascular reactivity, nitric oxide (NO·) and reactive oxygen species (ROS) generation, co-immunoprecipitation were assessed in thoracic aorta from male wild-type (WT), B1- (B1R(-/-)), B2- (B2R(-/-)) knockout mice...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28501796/nitric-oxide-synthase-inhibition-restores-orthostatic-tolerance-in-young-vasovagal-syncope-patients
#9
Julian M Stewart, Richard Sutton, Mira L Kothari, Amanda M Goetz, Paul Visintainer, Marvin Scott Medow
OBJECTIVE: Syncope is sudden transient loss of consciousness and postural tone with spontaneous recovery; the most common form is vasovagal syncope(VVS). We previously demonstrated impaired post-synaptic adrenergic responsiveness in young VVS patientswas reversed by blocking nitric oxide synthase(NOS). We hypothesised that nitric oxide may account for reduced orthostatic tolerance in young recurrent VVS patients. METHODS: We recorded haemodynamics in supine VVS and healthy volunteers (aged 15-27 years), challenged with graded lower body negative pressure (LBNP) (-15, -30, -45 mm Hg each for 5 min, then -60 mm Hg for a maximum of 50 min) with and without NOS inhibitor N(G)-monomethyl-L-arginine acetate(L-NMMA)...
May 13, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28501696/the-role-of-nitric-oxide-in-anticonvulsant-effect-of-nanocurcumine-on-pentylenetetrazole-induced-seizure-in-mice
#10
Alireza Aminirad, Seyyedeh Elaheh Mousavi, Nahid Fakhraei, Seyyedeh Mahbubeh Mousavi, Seyed Mahdi Rezayat
A plant alkaloid obtained from Curcuma longa, curcumin possesses anti-oxidant and anti-inflammatory effects. Nanoformulations have been developed for preclinical studies which demonstrate enhanced therapeutic efficacy. Effect of acute intraperitoneal (i.p.) administration of curcumin C3 complex nanoparticles [1,5, 10, 20, 40, 80mg/kg, (i.p.)] 75min prior to PTZ, on clonic seizure thresholds induced by intravenous infusion of pentylenetetrazole (PTZ) 0.5% was investigated in comparison with curcumin (40 and 80mg/kg, i...
May 10, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28496412/nitric-oxide-synthase-activity-correlates-with-ogg1-in-ozone-induced-lung-injury-animal-models
#11
Suqin Zhang, Jianhua Li, Yuqin Li, Yufeng Liu, Hongxiang Guo, Xiaoli Xu
Background: NO is an important cellular signaling molecule which is derived from L-arginine by nitric oxide synthase (NOS) and the effects of NOS signaling in lung injury is conflicting. The present study was designed to observe the effect of NOS and Arginase signaling in the occurrence and development of lung injury and its mechanism. Methods: An ozone-stressed lung injury animal model was established by exposure to 2.0 ppm O3 for 30 min every day for consecutive 12 day with or without the administration of NO precursor L-arginine or non-selective NOS inhibitor N-nitro-L-arginine methyl ester (L-NAME)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28493603/age-related-endothelial-dysfunction-in-human-skeletal-muscle-feed-arteries-the-role-of-free-radicals-derived-from-mitochondria-in-the-vasculature
#12
Song-Young Park, Oh Sung Kwon, Robert H I Andtbacka, John R Hyngstrom, Van Reese, Michael P Murphy, Russell S Richardson
AIM: This study sought to determine the role of free radicals derived from mitochondria in the vasculature in the recognized age-related endothelial dysfunction of human skeletal muscle feed arteries (SMFAs). METHODS: A total of 44 SMFAs were studied with and without acute exposure to the mitochondria-targeted antioxidant MitoQ and nitric oxide synthase (NOS) blockade. The relative abundance of proteins from the electron transport chain, phosphorylated (p-) to endothelial (e) NOS ratio, manganese superoxide dismutase (MnSOD), and the mitochondria-derived superoxide (O2(-) ) levels were assessed in SMFA...
May 11, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28491909/fluorescent-detection-of-intracellular-nitric-oxide-in-staphylococcus-aureus
#13
April M Lewis, Silvia S Matzdorf, Kelly C Rice
Nitric Oxide (NO) is a highly-reactive radical gas that can modify a variety of cellular targets in both eukaryotes and bacteria. NO is produced endogenously by a wide variety of organisms: For example, as a cell-signaling molecule in mammals and bacteria via nitric oxide synthase (NOS) enzymes, and as a product of denitrification. As such, it is of great benefit to NO researchers to be able to sensitively detect intracellular NO and stable reactive nitrogen species (RNS) derived from NO. To this end, a protocol for fluorescent detection of intracellular NO/RNS in biofilm cultures of the Gram-positive pathogen Staphylococcus aureus has been optimized using the commercially-available cell-permeable fluorescent stain 4-Amino-5-Methylamino-2', 7'-Difluorofluorescein Diacetate (DAF-FM diacetate)...
July 20, 2016: Bio-protocol
https://www.readbyqxmd.com/read/28490695/-effect-of-hydrogen-sulfide-on-inducible-nitric-oxide-synthase-in-kidneys-of-type-1-diabetic-rats
#14
Rui Yang, Qiang Jia, Shanfeng Ma, Shujun Cui, Xiaofen Liu, Yuanyuan Wang, Qin Gao
To investigate effects of hydrogen sulfide (H2S) on inducible nitric oxide synthase (iNOS) in kidneys of Type 1 diabetic rats.
 Methods: Thirty-two male SD rats were randomly divided into four groups: A normal control (NC) group, a diabetes mellitus (DM) group, a NaHS (NaHS+DM) group, and a NaHS control (NaHS) group (n=8 per group). Type 1 diabetes was induced by a single intraperitoneal injection of streptozotocin (55 mg/kg). After successful establishment of models, the rats in NaHS+DM and NaHS groups were injected with NaHS solution (56 μmol/kg) intraperitoneally...
April 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28487985/gardenia-jasminoides-has-therapeutic-effects-on-l%C3%A2-nna%C3%A2-induced-hypertension-in%C3%A2-vivo
#15
Shaocheng Chen, Peng Sun, Xin Zhao, Ruokun Yi, Jun Qian, Yanhong Shi, Rui Wang
Gardenia jasminoides is a plant that has been used in traditional Chinese medicine. It has four key active components (genipin gentiobioside, geniposide, crocin 1 and crocin 2). The aim of the present study was to determine the anti‑hypertension effects of Gardenia jasminoidesin vivo. The chemical composition of Gardenia jasminoides was determined using liquid chromatography. The anti‑hypertensive effects of Gardenia jasminoides were determined by a L‑NG‑nitroarginine (L‑NNA)‑induced hypertension animal model...
June 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28483509/nitric-oxide-in-the-nucleus-of-the-tractus-solitarius-is-involved-in-hypoglycemic-conditioned-response
#16
Beatriz A Alvarado, Mónica Lemus, Sergio Montero, Valery Melnikov, Sonia Luquín, Joaquín García-Estrada, Elena Roces de Álvarez-Buylla
The repeated injection of insulin (unconditioned stimulus, UCS) immediately followed by exposure to sensory stimulation (e.g. sound or odor; conditioned stimulus, CS) results in a learned conditioned reflex in which the exposure to the CS alone lowers blood glucose. The brain regions participating in this hypoglycemic Pavlovian response remain unknown. Here we investigate if nitric oxide (NO) in the nucleus tractus solitarius (NTS), a nucleus known to be involved in glucose homeostasis, participates in this hypoglycemic reflex...
May 5, 2017: Brain Research
https://www.readbyqxmd.com/read/28480026/exercise-training-provides-cardioprotection-by-activating-and-coupling-endothelial-nitric-oxide-synthase-via-a-%C3%AE-3-adrenergic-receptor-amp-activated-protein-kinase-signaling-pathway
#17
Larry A Barr, Jonathan P Lambert, Yuuki Shimizu, Lili A Barouch, Nawazish Naqvi, John W Calvert
Exercise training confers sustainable protection against ischemia/reperfusion injury. However, the mechanism by which this process occurs is not fully understood. Previously, it was shown that β3-adrenergic receptors (β3-ARs) play a critical role in regulating the activation of endothelial nitric oxide synthase (eNOS) in response to exercise and play a critical role in exercise-mediated cardioprotection. Intriguingly, a deficiency in β3-ARs led to increased myocardial injury following exercise training. The purpose of the current study was to determine mechanisms by which β3-ARs are linked to eNOS activation and to determine the mechanism responsible for the exacerbated ischemia/reperfusion injury displayed by β3-AR deficient (β3-AR KO) mice after exercise training...
January 2017: Medical Gas Research
https://www.readbyqxmd.com/read/28479248/effects-of-non-invasive-remote-ischemic-conditioning-on-rehabilitation-after-myocardial-infarction
#18
Meng-Yao An, Yan Li, Wen-Hua Chen, Ying Zhang, Yan-Na Wu, Kai Sun, Ying-Ying Pan, Yong-Qiang Yin, Jian-Shi Lou
Recent studies have demonstrated that remote ischemic conditioning (RIC) creates cardioprotection against ischemia/reperfusion injury and myocardial infarction (MI); however, the effects of non-invasive remote ischemic conditioning (nRIC) on prognosis and rehabilitation after MI (post-MI) remain unknown. We successfully established MI models involving healthy adult male Sprague-Dawley rats. The nRIC group repeatedly underwent 5 min of ischemia and 5 min of reperfusion in the left hind limb for three cycles every other day until weeks 4, 6, and 8 after MI...
May 4, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28476660/%C3%AE-adrenergic-induced-sr-ca-2-leak-is-mediated-by-an-epac-nos-pathway
#19
Laëtitia Pereira, Dan J Bare, Samuel Galice, Thomas R Shannon, Donald M Bers
Cardiac β-adrenergic receptors (β-AR) and Ca(2+)-Calmodulin dependent protein kinase (CaMKII) regulate both physiological and pathophysiological Ca(2+) signaling. Elevated diastolic Ca(2+) leak from the sarcoplasmic reticulum (SR) contributes to contractile dysfunction in heart failure and to arrhythmogenesis. β-AR activation is known to increase SR Ca(2+) leak via CaMKII-dependent phosphorylation of the ryanodine receptor. Two independent and reportedly parallel pathways have been implicated in this β-AR-CaMKII cascade, one involving exchange protein directly activated by cAMP (Epac2) and another involving nitric oxide synthase 1 (NOS1)...
May 2, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28469071/tetrahydrobiopterin-activates-brown-adipose-tissue-and-regulates-systemic-energy-metabolism
#20
Yasuo Oguri, Yoshihito Fujita, Abulizi Abudukadier, Akiko Ohashi, Tsuyoshi Goto, Futoshi Furuya, Akio Obara, Toru Fukushima, Naomi Matsuo, Minji Kim, Masaya Hosokawa, Teruo Kawada, Hiroyuki Hasegawa, Nobuya Inagaki
Brown adipose tissue (BAT) is a central organ that acts to increase energy expenditure; its regulatory factors could be clinically useful in the treatment of obesity. Tetrahydrobiopterin (BH4) is an essential cofactor of tyrosine hydroxylase and nitric oxide synthase (NOS). Although BH4 regulates the known regulatory factors of BAT, such as noradrenaline (NA) and NO, participation of BH4 in BAT function remains unclear. In the present study, we investigate the role of BH4 in the regulation of BAT. Hph-1 mice, a mouse model of BH4 deficiency, exhibit obesity, adiposity, glucose intolerance, insulin resistance, and impaired BAT function...
May 4, 2017: JCI Insight
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