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https://www.readbyqxmd.com/read/28326018/neuronal-nitric-oxide-synthase-in-neural-stem-cells-induces-neuronal-fate-commitment-via-the-inhibition-of-histone-deacetylase-2
#1
Xing Jin, Zhang-Feng Yu, Fang Chen, Guang-Xian Lu, Xin-Yuan Ding, Lin-Jun Xie, Jian-Tong Sun
Active adult neurogenesis produces new functional neurons, which replace the lost ones and contribute to brain repair. Promoting neurogenesis may offer a therapeutic strategy for human diseases associated with neurodegeneration. Here, we report that endogenous neuronal nitric oxide synthase (nNOS) for neural stem cells (NSCs) or progenitors positively regulates neurogenesis. nNOS repression exhibits significantly decreased neuronal differentiation and nNOS upregulation promotes neurons production from NSCs...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28324630/morphological-and-neurochemical-differences-in-peptidergic-nerve-fibres-of-the-mouse-vagina
#2
Christine Barry, Esther Ji, Harman Sharma, Lara Beukes, Pat Vilimas, Yvette DeGraaf, Dusan Matusica, Rainer V Haberberger
The vagina is innervated by a complex arrangement of sensory, sympathetic and parasympathetic nerve fibres that contain classical transmitters plus an array of neuropeptides and enzymes known to regulate diverse processes including blood flow and nociception. The neurochemical characteristics and distributions of peptide-containing nerves in the mouse vagina are unknown. This study used multiple labelling immunohistochemistry, confocal imaging and analysis to investigate the presence and colocalization of the peptides vasoactive intestinal polypeptide (VIP), calcitonin-gene related peptide (CGRP), substance P (SP), neuropeptide tyrosine (NPY) and the nitric oxide synthesizing enzyme neuronal nitric oxide synthase (nNOS) in nerve fibres of the murine vaginal wall...
March 21, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28322084/fine-structure-and-synaptology-of-the-nitrergic-neurons-in-medial-septum-of-the-rat-brain
#3
Katalin Halasy, Balázs Szőke, Gergely Janzsó
The nitrergic neuron population and certain aspects of their connectivity (peptidergic inputs, co-localization with GABA, synaptic target distribution) were studied in the medial septum of the rat brain. The histochemical localization of NADPH diaphorase and immunohistochemical identification of nNOS at light and electron microscopic level was applied. Double-labeling experiments with galanin and leucine enkephalin, moreover the postembedding GABA immunogold staining was also carried out. NADPH diaphorase- and nNOS-immunopositive neurons could be identified inside the borders of medial septum...
March 2017: Acta Biologica Hungarica
https://www.readbyqxmd.com/read/28302517/exercise-training-rescues-high-fat-diet-induced-neuronal-nitric-oxide-synthase-expression-in-the-hippocampus-and-cerebral-cortex-of-mice
#4
Yuki Tomiga, Saki Yoshimura, Ai Ito, Shihoko Nakashima, Kentaro Kawanaka, Yoshinari Uehara, Hiroaki Tanaka, Yasuki Higaki
Consumption of a high fat diet (HFD) and being overweight both induce functional deterioration and atrophy of the hippocampus. These alterations are associated with mental disorders such as depression and anxiety. Exercise combats obesity and enhances brain health. There is substantial evidence that neuronal nitric oxide synthase (nNOS) is a key regulator of affective behavior, and that increased brain nNOS leads to anxiety while environmental enrichment (EE), which reduces brain nNOS, has anxiolytic effects...
March 13, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28296653/involvement-of-hypothalamic-nitric-oxide-signaling-in-the-modulation-of-a-rat-s-exercise-capacity
#5
Hongyu Liu, Jinjuan Xue
PURPOSE: The aim of this study was to explore the effect of nitric oxide (NO) in some regions of the hypothalamus on exercise capacity. MATERIALS AND METHODS: To assess the role of central NO in exercise capacity, L-arginine (L-Arg, a precursor of NO synthesis), NG-nitro-L-arginine methyl ester (L-NAME, a NO synthase inhibitor), or placebo saline was injected into the lateral cerebral ventricle of rats once a day for 4 consecutive days. Thereafter, an one-time exhaustive treadmill exercise was performed, and the levels of nitrate/nitrite, as a marker of NO production, in blood plasma and hypothalamus were assayed...
March 14, 2017: Neuroreport
https://www.readbyqxmd.com/read/28287478/myocardial-ischemic-postconditioning-promotes-autophagy-against-ischemia-reperfusion-injury-via-the-activation-of-the-nnos-ampk-mtor-pathway
#6
Maojuan Hao, Suhua Zhu, Liang Hu, Hongyi Zhu, Xiaowei Wu, Qingping Li
Autophagy participates in the progression of many diseases, comprising ischemia/ reperfusion (I/R). It is reported that it is involved in the protective mechanism of ischemic postconditioning (IPostC). According to research, neuronal nitric oxide synthase (nNOS) is also involved in the condition of I/R and IPostC. However, the relationship between nNOS, autophagy and IPostC has not been previously investigated. We hypothesize that IPostC promotes autophagy activity against I/R injury partially through nNOS-mediated pathways...
March 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28285942/small-molecule-inhibitors-of-psd95-nnos-protein-protein-interactions-suppress-formalin-evoked-fos-protein-expression-and-nociceptive-behavior-in-rats
#7
Lawrence M Carey, Wan-Hung Lee, Tannia Gutierrez, Pushkar M Kulkarni, Ganesh A Thakur, Yvonne Y Lai, Andrea G Hohmann
Excessive activation of NMDA receptor (NMDAR) signaling within the spinal dorsal horn contributes to central sensitization and the induction and maintenance of pathological pain states. However, direct antagonism of NMDARs produces undesirable side effects which limit their clinical use. NMDAR activation produces central sensitization, in part, by initiating a signaling cascade that activates the enzyme neuronal nitric oxide synthase (nNOS) and generates the signaling molecule nitric oxide (NO). NMDAR-mediated activation of nNOS requires a scaffolding protein, postsynaptic density protein 95 kDa (PSD95), which tethers nNOS to NMDARs...
March 7, 2017: Neuroscience
https://www.readbyqxmd.com/read/28284945/fish-oil-prevents-rodent-anxious-states-comorbid-with-diabetes-a-putative-involvement-of-nitric-oxide-modulation
#8
Isadora Pozzetti Siba, Mariza Bortolanza, Maria Aparecida Barbato Frazão Vital, Roberto Andreatini, Joice Maria da Cunha, Elaine Aparecida Del Bel, Janaína Menezes Zanoveli
There is an urgent need to understand the pathophysiological mechanisms related to anxiety associated with diabetes, seeking more effective alternative treatments to treat it. For that, the effect of a preventive and prolonged treatment with fish oil (FO), a source of omega-3 polyunsaturated fatty acid, was tested in streptozotocin-diabetic (DBT) rats submitted to the anxiety tests. Additionally, an immunohistochemistry for neuronal NO synthase (nNOS) was performed in brain areas related to anxiety, such as lateral amygdala (AMY), hippocampus (HIP) and dorsolateral periaqueductal gray (dlPAG)...
March 8, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28284823/activation-of-the-nmda-receptor-neuronal-nitric-oxide-synthase-pathway-within-the-ventral-bed-nucleus-of-the-stria-terminalis-mediates-the-negative-affective-component-of-pain
#9
Satoshi Deyama, Yaya Sugano, Sakura Mori, Taiju Amano, Mitsuhiro Yoshioka, Katsuyuki Kaneda, Masabumi Minami
Pain consists of sensory and affective components. Although the neuronal mechanisms underlying the sensory component of pain have been studied extensively, those underlying its affective component are only beginning to be elucidated. Previously, we showed the pivotal role of the ventral part of the bed nucleus of the stria terminalis (vBNST) in the negative affective component of pain. Here, we examined the role of glutamate-nitric oxide (NO) signaling in the affective component of pain in rats using a conditioned place aversion (CPA) test...
March 9, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28277146/efficacy-of-gold-nanoparticles-against-isoproterenol-induced-acute-myocardial-infarction-in-adult-male-albino-rats
#10
Samah M Ahmed, Shaimaa Ali Abdelrahman, Alaa Elsayed Salama
This study was undertaken to investigate the role of gold nanoparticles (GNPs) of 50 nm diameter on isoproterenol (ISO) induced acute myocardial infarction in adult male albino rats. Forty five adult Wistar male albino rats were equally divided into three groups. Control (group I) was further subdivided into three subgroups. In group II, the rats received ISO subcutaneously at a dose of 100 mg/kg for three days. In group III, rats received ISO as group II and then GNPs (400 μg/kg/day) intravenously for 14 consecutive days...
March 1, 2017: Ultrastructural Pathology
https://www.readbyqxmd.com/read/28275829/endothelial-nitric-oxide-synthase-in-rat-brain-is-downregulated-by-sub-chronic-antidepressant-treatment
#11
Yuta Yoshino, Shinichiro Ochi, Kiyohiro Yamazaki, Shunsuke Nakata, Jun-Ichi Iga, Shu-Ichi Ueno
BACKGROUND: Nitric oxide (NO) is a neurotransmitter that may be related to major depressive disorder (MDD) because the selective neuronal NO synthase (NOS) inhibitor, 7-nitroindazole, induces a dose-dependent antidepressant-like effect. NO modulates major neurotransmitters involved in the neurobiology of MDD, such as norepinephrine, serotonin, dopamine, and glutamate. In this study, we investigated the effects of antidepressants as NO modulators in acute and sub-chronic treatments. METHODS: Rats were injected with the SSRI paroxetine (PAR, 10 mg/kg), the SNRI milnacipran (MIL, 30 mg/kg), or the NaSSA mirtazapine (MIR, 10 mg/kg) for acute (1 h) or sub-chronic (3 weeks) treatment prior to analysis of nine brain regions (frontal cortex, temporal cortex, striatum, thalamus, hippocampus, midbrain, pons, cerebellum, and olfactory bulb)...
March 8, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28264923/blood-pressure-in-healthy-humans-is-regulated-by-neuronal-no-synthase
#12
Husain Shabeeh, Sitara Khan, Benyu Jiang, Sally Brett, Narbeh Melikian, Barbara Casadei, Philip J Chowienczyk, Ajay M Shah
NO is physiologically generated by endothelial and neuronal NO synthase (nNOS) isoforms. Although nNOS was first identified in brain, it is expressed in other tissues, including perivascular nerves, cardiac and skeletal muscle. Increasing experimental evidence suggests that nNOS has important effects on cardiovascular function, but its composite effects on systemic hemodynamics in humans are unknown. We undertook the first human study to assess the physiological effects of systemic nNOS inhibition on basal hemodynamics...
March 6, 2017: Hypertension
https://www.readbyqxmd.com/read/28261911/alterations-in-the-small-intestinal-wall-and-motor-function-after-repeated-cisplatin-in-rat
#13
J A Uranga, J M García-Martínez, C García-Jiménez, G Vera, M I Martín-Fontelles, R Abalo
BACKGROUND: Gastrointestinal adverse effects occurring during cancer chemotherapy are well known and feared; those persisting once treatment has finished are relatively unknown. We characterized the alterations occurring in the rat small intestine, after repeated treatment with cisplatin. METHODS: Male Wistar rats received saline or cisplatin (2 mg kg(-1)  week(-1) , for 5 weeks, ip). Gastric motor function was studied non-invasively throughout treatment (W1-W5) and 1 week after treatment finalization (W6)...
March 6, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28259097/mammalian-target-of-rapamycin-mtor-nitric-oxide-system-possibly-modulate-antidepressant-like-effect-of-17%C3%AE-ethinyl-estradiol-in-ovariectomized-mice
#14
Seyed Soheil Saeedi Saravi, Alireza Arefidoust, Seyed Sobhan Saeedi Saravi, Rahele Yaftian, Mahdi Bayati, Milad Salehi, Ahmad Reza Dehpour
Due to a close association between depressive disorders and altered estrogen levels, this study was conducted to examine the hypothesis that antidepressant-like effect of ethinyl estradiol (EE2) in ovariectomized mice is modulated by mammalian target of rapamycin (mTOR)/nitric oxide pathways. Female mice were undergone bilateral ovariectomy and different doses of EE2 were intraperitoenally injected alone and combined with specific mTOR inhibitor, rapamycin, non-specific NOS inhibitor, L-NAME, nNOS inhibitor, 7-NI, NO precursor, l-arginine, and selective PDE5I, sildenafil...
March 1, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28254540/endothelial-nitric-oxide-synthase-polymorphism-is-associated-with-delayed-cerebral-ischemia-following-aneurysmal-subarachnoid-hemorrhage
#15
Philipp Hendrix, Paul M Foreman, Mark R Harrigan, Winfield S Fisher, Nilesh A Vyas, Robert H Lipsky, Minkuan Lin, Beverly C Walters, R Shane Tubbs, Mohammadali M Shoja, Jean-Francois Pittet, Mali Mathru, Christoph J Griessenauer
BACKGROUND: and Purpose: Nitric oxide (NO) is critical in the regulation of cerebral blood flow and smooth muscle proliferation. It is synthesized by three nitric oxide synthase (NOS) isoforms: neuronal (nNOS), inducible (iNOS), and endothelial NOS (eNOS). Aneurysmal subarachnoid hemorrhage (aSAH) causes endothelial dysfunction which, in turn, contributes to pathophysiological processes surrounding aSAH. Previous studies reported an association of an eNOS single nucleotide polymorphism (SNP) with the clinical sequelae of aSAH...
February 22, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28251951/-protective-effects-of-a-new-glutamic-acid-derivative-against-stress-after-nnos-blockade
#16
I N Tyurenkov, T A Popova, V N Perfilova, I I Prokofiev, A V Borisov, M V Kustova, G I Zaypullaev, О V Ostrovskij
We studied the effects of a new glutamic acid derivative, glufimet, on oxidative stress, activity of antioxidant enzymes, mitochondrial respiration, endothelial vasodilation and anti-platelet activity in female rats after exposure to 24-hour immobilization pain stress and 7-nitroindazole, a neuronal nitric oxide synthase (nNOS) inhibitor. A single dose administration of glufimet (29 mg/kg intraperitoneally) 10 minutes before stress exposure caused a decrease of NO metabolites in serum (by 27.2%) and heart homogenate (33...
January 2017: Biomedit︠s︡inskai︠a︡ Khimii︠a︡
https://www.readbyqxmd.com/read/28247940/plasma-membrane-calcium-atpase-4-pmca4-co-ordinates-calcium-and-nitric-oxide-signaling-in-regulating-murine-sperm-functional-activity
#17
Kristine E Olli, Kun Li, Deni S Galileo, Patricia A Martin-DeLeon
Reduced sperm motility (asthenospermia) and resulting infertility arise from deletion of the Plasma Membrane Ca(2+) -ATPase 4 (Pmca4) gene which encodes the highly conserved Ca(2+) efflux pump, PMCA4. This is the major Ca(2+) clearance protein in murine sperm. Since the mechanism underlying asthenospermia in PMCA4's absence or reduced activity is unknown, we investigated if sperm PMCA4 negatively regulates nitric oxide synthases (NOSs) and when absent NO, peroxynitrite, and oxidative stress levels are increased...
March 1, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28241801/the-protective-effects-of-propofol-against-cocl2-induced-ht22-cell-hypoxia-injury-via-pp2a-camkii%C3%AE-nnos-pathway
#18
Yan Lu, Wei Chen, Chen Lin, Jiaqiang Wang, Minmin Zhu, Jiawei Chen, Changhong Miao
BACKGROUND: Perioperative cerebral ischemia/hypoxia could induce hippocampal injury and has been reported to induce cognitive impairment. In this study, we used cobalt chloride (CoCl2) to build a hypoxia model in mouse hippocampal cell lines. Propofol, a widely used intravenous anesthetic agent, has been demonstrated to have neuroprotective effect. Here, we explored whether and how propofol attenuated CoCl2-induced mouse hippocampal HT22 cell injury. METHODS: Mouse hippocampal HT22 cells were pretreated with propofol, and then stimulated with CoCl2...
February 28, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28238085/o-glcnac-glycosylation-of-nnos-promotes-neuronal-apoptosis-following-glutamate-excitotoxicity
#19
Rongrong Chen, Peipei Gong, Tao Tao, Yilu Gao, Jianhong Shen, Yaohua Yan, Chengwei Duan, Jun Wang, Xiaojuan Liu
Ischemic stroke is a dominant health problem with extremely high rates of mortality and disability. The main mechanism of neuronal injury after stroke is excitotoxicity, during which the activation of neuronal nitric oxide synthase (nNOS) exerts a vital role. However, directly blocking N-methyl-D-aspartate receptors or nNOS can lead to severe undesirable effects since they have crucial physiological functions in the central nervous system. Here, we report that nNOS undergoes O-linked-β-N-acetylglucosamine (O-GlcNAc) modification via interacting with O-GlcNAc transferase, and the O-GlcNAcylation of nNOS remarkably increases during glutamate-induced excitotoxicity...
February 25, 2017: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/28235709/role-of-erk1-2-activation-and-nnos-uncoupling-on-endothelial-dysfunction-induced-by-lysophosphatidylcholine
#20
Gianne P Campos-Mota, Juliana M Navia-Pelaez, Jessica Cristina Araujo-Souza, Nikos Stergiopulos, Luciano S A Capettini
BACKGROUND AND AIMS: Lysophosphatidylcholine (LPC) - a main component of oxidized LDL - is involved in endothelial dysfunction that precedes atherosclerosis, with an increased superoxide anions and a reduced NO production via endothelial NO synthase (eNOS) uncoupling. However, there is no evidence about the mechanisms involved in neuronal NOS (nNOS) uncoupling. Extracellular signal-regulated kinase (ERK) is related to the control of NO production and inflammatory gene transcription activation in atherosclerosis...
March 2017: Atherosclerosis
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