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https://www.readbyqxmd.com/read/29215757/hypothalamic-paraventricular-nucleus-neuronal-nitric-oxide-synthase-activity-is-a-major-determinant-of-renal-sympathetic-discharge-in-conscious-wistar-rats
#1
F D McBryde, B H Liu, E V Roloff, S Kasparov, J F R Paton
The paraventricular nucleus of the hypothalamus (PVN) plays a crucial role in cardiovascular and neuroendocrine regulation. Application of nitric oxide donors to the PVN stimulates GABAergic transmission, and may suppress sympathetic nerve activity (SNA) to lower arterial pressure. However, the role of endogenous nitric oxide within PVN in regulating renal SNA chronically remains to be established in conscious animals. To address this, we used our previously established lentiviral vectors to selectively knock down neuronal nitric oxide synthase (nNOS) in the PVN of conscious Wistar rats...
December 7, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/29201228/insect-tea-attenuates-hydrochloric-acid-and-ethanol-induced-mice-acute-gastric-injury
#2
Xin Zhao, Qiang Cheng, Yu Qian, Ruokun Yi, Lianjie Gu, Shanshan Wang, Jia-Le Song
The aim of the present study was to investigate the protective effect of insect tea on HCl/ethanol-induced gastric ulcers in ICR mice. The serum levels of vasoactive intestinal peptide, substance P, somatostatin, motilin and endothelin-1 in mice were assessed using commercial kits and gastric tissues of superoxide dismutase (SOD, nitric oxide (NO) and malondialdehyde (MDA) were determined using western blot analysis Insect tea significantly reduced HCl/ethanol-induced gastric juice secretion and increased the pH of gastric juice (P<0...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29199177/inhibition-of-glycogen-phosphorylase-stimulates-ventromedial-hypothalamic-nucleus-amp-activated-protein-kinase-activity-and-neuronal-nitric-oxide-synthase-protein-expression-in-male-rats
#3
Hussain N Alhamami, Ayed Alshamrani, Karen P Briski
The glucose polymer glycogen is a vital fuel reserve in the brain. The mediobasal hypothalamic energy sensor AMP-activated protein kinase (AMPK) maintains glucostasis via neurotransmitter mechanisms that suppress [γ-aminobutyric acid; GABA] or stimulate [nitric oxide; steroidogenic factor-1 (SF1)] counter-regulatory outflow. This study investigated whether glycogen-derived fuel supply is a critical screened variable in ventromedial hypothalamic nucleus (VMN) monitoring of neuro-metabolic stability during glucostasis and/or insulin (I)-induced hypoglycemia...
December 2017: Physiological Reports
https://www.readbyqxmd.com/read/29193716/acute-inhibition-of-pmca4-but-not-global-ablation-reduces-blood-pressure-and-arterial-contractility-via-a-nnos-dependent-mechanism
#4
Sophronia Lewis, Robert Little, Florence Baudoin, Sukhpal Prehar, Ludwig Neyses, Elizabeth J Cartwright, Clare Austin
Cardiovascular disease is the world's leading cause of morbidity and mortality, with high blood pressure (BP) contributing to increased severity and number of adverse outcomes. Plasma membrane calcium ATPase 4 (PMCA4) has been previously shown to modulate systemic BP. However, published data are conflicting, with both overexpression and inhibition of PMCA4 in vivo shown to increase arterial contractility. Hence, our objective was to determine the role of PMCA4 in the regulation of BP and to further understand how PMCA4 functionally regulates BP using a novel specific inhibitor to PMCA4, aurintricarboxylic acid (ATA)...
November 30, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29193067/the-role-of-s-nitrosylation-of-kainate-type-of-ionotropic-glutamate-receptor-2-in-epilepsy-induced-by-kainic-acid
#5
Linxiao Wang, Yanyan Liu, Rulan Lu, Guoying Dong, Xia Chen, Wenwei Yun, Xianju Zhou
Epilepsy is a chronic brain disease affecting millions of individuals. Kainate receptors (KARs),especially kainate-type of ionotropic glutamate receptor 2 (GluK2), play an important role in epileptogenesis. Recent data showed GluK2 could undergo post-translational modifications in terms of S-nitrosylation (SNO), and affect the signaling pathway of cell death in cerebral ischemia-reperfusion. However, it is unclear whether S-nitrosylation of GluK2 (SNO-GluK2) contributes to cell death induced by epilepsy. Here we report that kainic acid (KA)-induced SNO-GluK2 is mediated by GluK2 itself, regulated by neuronal nitric oxide synthase (nNOS) and the level of cytoplasmic calcium in vivo and in vitro hippocampus neurons...
November 29, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29186858/differential-expression-of-nitric-oxide-synthase-isoforms-nnos-and-inos-in-patients-with-non-segmental-generalized-vitiligo
#6
Mario Vaccaro, Natasha Irrera, Giuseppina Cutroneo, Giuseppina Rizzo, Federico Vaccaro, Giuseppe P Anastasi, Francesco Borgia, Serafinella P Cannavò, Domenica Altavilla, Francesco Squadrito
Nitric oxide (NO) is involved in several biological processes, but its role in human melanogenesis is still not well understood. Exposure to UVA and UVB induces nitric oxide production in keratinocytes and melanocytes through the activation of constitutive nitric oxide synthase, increasing tyrosinase activity and melanin synthesis, whereas inducible nitric oxide synthase over expression might be involved in hypopigmentary disorders. The aim of this study was to evaluate whether inducible nitric oxide synthase and neuronal nitric oxide synthase expression were modified in vitiligo skin compared to healthy controls...
November 26, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29183804/modulation-of-nnosser852-phosphorylation-and-translocation-by-pka-pp1-pathway-in-endothelial-cells
#7
Juliana M Navia-Pelaez, Gianne P Campos-Mota, Jessica C Araujo-Souza, Nikos Stergiopulos, Luciano S A Capettini
Neuronal nitric oxide synthase (nNOS) is now considered an important player in vascular function. It has a protective role in atherosclerosis and hypertension. However, despite its importance, little is known about the mechanisms that regulate its activity in vascular cells. Here we explore the mechanisms by which nNOS is activated in endothelium. We evaluated aorta relaxation response and phosphorylation of nNOS during protein phosphatases 1 and 2 (PP1 and PP2) inhibition, in eNOS silenced mice. PP1 translocation and interaction between the nuclear inhibitor of PP1 (NIPP1) and PP1 was evaluated in endothelial EA...
November 25, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/29182640/changes-in-the-interstitial-cells-of-cajal-and-neuronal-nitric-oxide-synthase-positive-neuronal-cells-with-aging-in-the-esophagus-of-f344-rats
#8
Hee Jin Kim, Nayoung Kim, Yong Sung Kim, Ryoung Hee Nam, Sun Min Lee, Ji Hyun Park, Daeun Choi, Young-Jae Hwang, Jongchan Lee, Hye Seung Lee, Min-Seob Kim, Moon Young Lee, Dong Ho Lee
The aging-associated cellular and molecular changes in esophagus have not been established, yet. Thus we evaluated histological structure, interstitial cells of Cajal (ICCs), neuronal nitric oxide synthase (nNOS)-positive cells, and contractility in the esophagus of Fischer 344 rat at different ages (6-, 31-, 74-weeks, and 2-years). The lamina propria thickness and endomysial area were calculated. The immunoreactivity of c-Kit, nNOS and protein gene product (PGP) 9.5 was counted after immunohistochemistry. Expression of c-Kit, stem cell factor (SCF), nNOS and PGP 9...
2017: PloS One
https://www.readbyqxmd.com/read/29178496/kisspeptin-gnrh-and-er%C3%AE-colocalise-with-nnos-neurones-in-prepubertal-female-sheep
#9
Michelle N Bedenbaugh, Ryan C O'Connell, Justin A Lopez, Richard B McCosh, Robert L Goodman, Stanley M Hileman
Puberty is a process which integrates multiple inputs that ultimately cause an increase in gonadotrophin-releasing hormone (GnRH) secretion. While kisspeptin neurones play an integral role in GnRH secretion and puberty onset, other systems are also likely important. One potential component is nitric oxide (NO), a gaseous neurotransmitter synthesized by nitric oxide synthase (NOS). In this study, we sought to neuroanatomically characterise neuronal NOS (nNOS) in prepubertal female sheep and determine if oestradiol would exert effects on this system...
November 25, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/29172736/role-of-glial-cells-in-%C3%AE-opioid-receptor-mediated-vasodilation-in-the-rat-retina
#10
Eriko Someya, Asami Mori, Daiki Asano, Akane Morita, Kenji Sakamoto, Tsutomu Nakahara
PURPOSE: Our recent study demonstrated that herkinorin, a non-opioid μ-receptor agonist derived from salvinorin A, dilates retinal arterioles through stimulation of μ-opioid receptors in rats. Activation of neuronal nitric oxide (NO) synthase and the presence of ganglion cells in the retina appear to be crucial for inducing μ-opioid receptor-mediated retinal vasodilation. In the present study, we examined the role of the interaction between neurons and glia in the retinal vasodilator mechanism involving μ-opioid receptors in rats...
November 27, 2017: Current Eye Research
https://www.readbyqxmd.com/read/29169825/nitric-oxide-cgmp-pkg-signaling-in-the-bed-nucleus-of-the-stria-terminalis-modulates-the-cardiovascular-responses-to-stress-in-male-rats
#11
Lucas Barretto-de-Souza, Mariane B Adami, Leandro A Oliveira, Lucas Gomes-de-Souza, Josiane O Duarte, Jeferson Almeida, Carlos C Crestani
The bed nucleus of the stria terminalis (BNST) constitutes an important component of neural substrates of physiological and behavioral responses to aversive stimuli, and it has been implicated on cardiovascular responses evoked by stress. Nevertheless, the local neurochemical mechanisms involved in BNST control of cardiovascular responses during aversive threats are still poorly understood. Thus, the aim of the present study was to assess the involvement of activation in the BNST of the neuronal isoform of the enzyme nitric oxide synthase (nNOS), as well as of signaling mechanisms related to nitric oxide effects such as soluble guanylate cyclase (sGC) and protein kinase G (PKG) on cardiovascular responses induced by an acute session of restraint stress in male rats...
November 20, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29164834/effects-of-next-generation-low-energy-extracorporeal-shockwave-therapy-on-erectile-dysfunction-in-an-animal-model-of-diabetes
#12
Hyun Cheol Jeong, Seung Hwan Jeon, Zhu Guan Qun, Kang Sup Kim, Sae Woong Choi, Fahad Bashraheel, Woong Jin Bae, Su Jin Kim, Hyuk Jin Cho, U Syn Ha, Sung Hoo Hong, Ji Youl Lee, Du Geon Moon, Sae Woong Kim
PURPOSE: Gene therapy, stem cell therapy, and low-energy extracorporeal shockwave therapy (ESWT) have been investigated as treatments for refractory erectile dysfunction (ED), but inconclusive evidence has been obtained. We investigated the effect of a next-generation electromagnetic cylinder ESWT device on an animal model of ED. MATERIALS AND METHODS: Diabetes mellitus (DM)-induced rats were divided into 3 groups: group 1, control; group 2, DM; and group 3, DM+ESWT...
November 20, 2017: World Journal of Men's Health
https://www.readbyqxmd.com/read/29163149/gyy4137-an-h2s-slow-releasing-donor-prevents-nitrative-stress-and-%C3%AE-synuclein-nitration-in-an-mptp-mouse-model-of-parkinson-s-disease
#13
Xiaoou Hou, Yuqing Yuan, Yulan Sheng, Baoshi Yuan, Yali Wang, Jiyue Zheng, Chun-Feng Liu, Xiaohu Zhang, Li-Fang Hu
The neuromodulator hydrogen sulfide (H2S) was shown to exert neuroprotection in different models of Parkinson's disease (PD) via its anti-inflammatory and anti-apoptotic properties. In this study, we evaluated the effect of an H2S slow-releasing compound GYY4137 (GYY) on a mouse PD model induced by acute injection with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP). GYY was intraperitoneally (i.p.) injected once daily into male C57BL/6J mice 3 days before and 2 weeks after MPTP (14 mg/kg, four times at 2-h intervals, i...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29151690/region-dependent-effects-of-diabetes-and-insulin-replacement-on-neuronal-nitric-oxide-synthase-and-heme-oxygenase-immunoreactive-submucous-neurons
#14
Nikolett Bódi, Zita Szalai, Lalitha Chandrakumar, Mária Bagyánszki
AIM: To investigate the intestinal segment-specific effects of diabetes and insulin replacement on the density of different subpopulations of submucous neurons. METHODS: Ten weeks after the onset of type 1 diabetes samples were taken from the duodenum, ileum and colon of streptozotocin-induce diabetic, insulin-treated diabetic and sex- and age-matched control rats. Whole-mount preparations of submucous plexus were prepared from the different gut segments for quantitative fluorescent immunohistochemistry...
November 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29145710/testosterone-replacement-in-transgenic-sickle-cell-mice-controls-priapic-activity-and-upregulates-pde5-expression-and-enos-activity-in-the-penis
#15
B Musicki, S Karakus, W Akakpo, F H Silva, J Liu, H Chen, B R Zirkin, A L Burnett
Sickle cell disease (SCD)-associated priapism is characterized by decreased nitric oxide (NO) signaling and downregulated phosphodiesterase (PDE)5 protein expression and activity in the penis. Priapism is also associated with testosterone deficiency, but molecular mechanisms underlying testosterone effects in the penis in SCD are not known. Given the critical role of androgens in erection physiology and NO synthase (NOS)/PDE5 expression, we hypothesized that testosterone replacement to eugonadal testosterone levels reduces priapism by reversing impaired endothelial (e)NOS activity and molecular abnormalities involving PDE5...
November 16, 2017: Andrology
https://www.readbyqxmd.com/read/29142468/glucagon-like-peptide-2-modulates-the-nitrergic-neurotransmission-in-strips-from-the-mouse-gastric-fundus
#16
Rachele Garella, Eglantina Idrizaj, Chiara Traini, Roberta Squecco, Maria Giuliana Vannucchi, Maria Caterina Baccari
AIM: To investigate whether glucagon-like peptide-2 (GLP-2) influences the neurally-induced responses in gastric strips from mice, since no data are available. METHODS: For functional experiments, gastric fundal strips were mounted in organ baths containing Krebs-Henseleit solution. Mechanical responses were recorded via force-displacement transducers, which were coupled to a polygraph for continuous recording of isometric tension. Electrical field stimulation (EFS) was applied via two platinum wire rings through which the preparation was threaded...
October 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29141105/the-feasibility-of-intraperitoneal-placenta-derived-mesenchymal-stem-cell-injection-in-stomachs-of-diabetic-mice
#17
Jong Min Park, Sang Hwan Lee, Kwang Il Kim, Won Hee Kim, Joo Young Cho, Ki Baik Hahm, Sung Pyo Hong
BACKGROUND/AIMS: Diabetic gastropathy is associated with loss of Interstitial cells of Cajal (ICCs) and autonomic neuropathy. Effective management for diabetic gastropathy is still unavailable. This study was aimed to confirm the pathogenetic changes in diabetic gastropathy and to examine the effect of treatment with placental derived mesenchymal stem cells (PDMSCs) in stomachs of animal models. METHODS: Fourteen NOD/ShiLtJ mice of 8 weeks were bled until week 30...
November 15, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29132544/histaminergic-receptors-modulate-spinal-cord-injury-induced-neuronal-nitric-oxide-synthase-upregulation-and-cord-pathology-new-roles-of-nanowired-drug-delivery-for-neuroprotection
#18
Hari S Sharma, Ranjana Patnaik, Dafin F Muresanu, José V Lafuente, Asya Ozkizilcik, Z Ryan Tian, Ala Nozari, Aruna Sharma
The possibility that histamine influences the spinal cord pathophysiology following trauma through specific receptor-mediated upregulation of neuronal nitric oxide synthase (nNOS) was examined in a rat model. A focal spinal cord injury (SCI) was inflicted by a longitudinal incision into the right dorsal horn of the T10-11 segments. The animals were allowed to survive 5h. The SCI significantly induced breakdown of the blood-spinal cord barrier to protein tracers, reduced the spinal cord blood flow at 5h, and increased the edema formation and massive upregulation of nNOS expression...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/29121483/effects-of-n-carbamylglutamate-and-l-arginine-on-gonadotrophin-releasing-hormone-gnrh-gene-expression-and-secretion-in-gt1-7-cells
#19
Y Liu, J H Bai, X L Xu, Z L Chen, L J Spicer, T Feng
Recent studies have shown that N-carbamylglutamate (NCG) and arginine (ARG) supplementation improves reproductive performance in livestock. The objectives of the present study were to evaluate the effects of NCG and ARG on GT1-7 cell gonadotrophin-releasing hormone (GnRH) secretion, gene expression and cell proliferation. GT1-7 cells were treated in vitro with different concentrations of NCG (0-1.0mM) or ARG (0-4.0mM) in serum-free medium for 12 or 24h. For GnRH secretion and cell proliferation, GT1-7 cells were more sensitive to NCG than ARG...
November 10, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/29110178/priapism-in-a-fabry-disease-mouse-model-is-associated-with-upregulated-penile-nnos-and-enos-expression
#20
Xing-Li Meng, Erland Arning, Mary Wight-Carter, Taniqua S Day, Siamak Jabbarzadeh-Tabrizi, Shuyuan Chen, Robin J Ziegler, Teodoro Bottiglieri, Jay W Schneider, Seng H Cheng, Raphael Schiffmann, Jin-Song Shen
Fabry disease is a glycosphingolipidosis caused by deficient activity of α-galactosidase A; it is one of a few diseases that are associated with priapism, an abnormal prolonged erection of the penis. The goal of this study was to investigate the pathogenesis of Fabry disease-associated priapism in a mouse model of the disease. We found that Fabry mice develop late-onset priapism. Neuronal nitric oxide synthase (nNOS), which was predominantly present as the 120-kDa N-terminus-truncated form, was significantly upregulated in the penis of 18-month-old Fabry mice compared to wild type controls (~fivefold)...
November 6, 2017: Journal of Inherited Metabolic Disease
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