Vulgarenol, a Sesquiterpene Isolated from Magnolia grandiflora, Induces Nitric Oxide Synthases II and III Overexpression in Guinea Pig Hearts

2007 ◽  
Vol 62 (9-10) ◽  
pp. 725-730 ◽  
Author(s):  
Leonardo del Valle-Mondragón ◽  
Fermín Alejandro Tenorio-López ◽  
Gabriela Zarco-Olvera ◽  
Gustavo Pastelín-Hernández
Keyword(s):  
Nitric Oxide ◽  
Soluble Guanylyl Cyclase ◽  
Cyclic Guanosine Monophosphate ◽  
Guanosine Monophosphate ◽  
Control Group ◽  
Perfused Heart ◽  
Vasodilator Effect ◽  
Nitric Oxide Release ◽  
Magnolia Grandiflora ◽  
Coronary Vasodilator

Vulgarenol, a sesquiterpene isolated from Magnolia grandiflora flower petals, decreased coronary vascular resistance in the Langendorff isolated and perfused heart model, when compared to the control group [(15.2 × 107 ± 1.0 × 107) dyn s cm-5 vs. (36.8 X 107 ± 1.2 × 107) dyn s cm-5]. Our data suggest that this coronary vasodilator effect probably involved inducible and endothelial nitric oxide synthase overexpression (6.8 and 4.2 times over control, respectively), which correlated with increases in nitric oxide release [(223 ± 9) pmol mL-1 vs. (61 ±11) pmol mL-1] and in cyclic guanosine monophosphate production [(142 ± 8) pmol mg-1 of tissue vs. (44±10) pmol mg-1 of tissue], as compared to control values. This effect was antagonized by 3 μm gadolinium(III) chloride, 100 μm N-nitro-L-arginine methyl ester, and 10 μm 1H-[1,2,4]oxadiazolo[4,2-a]quinoxalin-1-one. Hence, the vulgarenol-elicited coronary vasodilator effect could be mediated by the nitric oxide-soluble guanylyl cyclase pathway.

scholarly journals Cyclic Guanosine Monophosphate Modulates Locomotor Acceleration Induced by Nitric Oxide but not Serotonin in Clione limacina Central Pattern Generator Swim Interneurons

2020 ◽  
Author(s):  
Thomas J Pirtle ◽  
Richard A Satterlie
Keyword(s):  
Nitric Oxide ◽  
Central Pattern Generator ◽  
Guanylyl Cyclase ◽  
Signal Transduction Pathway ◽  
Soluble Guanylyl Cyclase ◽  
Cyclic Guanosine Monophosphate ◽  
Pattern Generator ◽  
Guanosine Monophosphate ◽  
Cellular Changes ◽  
Clione Limacina

Abstract Typically, the marine mollusk, Clione limacina, exhibits a slow, hovering locomotor gait to maintain its position in the water column. However, the animal exhibits behaviorally relevant locomotor swim acceleration during escape response and feeding behavior. Both nitric oxide and serotonin mediate this behavioral swim acceleration. In this study, we examine the role that the second messenger, cGMP, plays in mediating nitric oxide and serotonin-induced swim acceleration. We observed that the application of an analog of cGMP or an activator of soluble guanylyl cyclase increased fictive locomotor speed recorded from Pd-7 interneurons of the animal’s locomotor central pattern generator. Moreover, inhibition of soluble guanylyl cyclase decreased fictive locomotor speed. These results suggest that basal levels of cGMP are important for slow swimming and that increased production of cGMP mediates swim acceleration in Clione. Because nitric oxide has its effect through cGMP signaling and because we show herein that cGMP produces cellular changes in Clione swim interneurons that are consistent with cellular changes produced by serotonin application, we hypothesize that both nitric oxide and serotonin function via a common signal transduction pathway that involves cGMP. Our results show that cGMP mediates nitric oxide-induced but not serotonin-induced swim acceleration in Clione.

scholarly journals Nitric Oxide

2007 ◽  
Vol 107 (5) ◽  
pp. 822-842 ◽  
Author(s):  
Noboru Toda ◽  
Hiroshi Toda ◽  
Yoshio Hatano ◽  
David C. Warltier
Keyword(s):  
Nitric Oxide ◽  
Myocardial Dysfunction ◽  
Ischemia Reperfusion ◽  
Cyclic Guanosine Monophosphate ◽  
Guanosine Monophosphate ◽  
Nitric Oxide Release ◽  
Blood Flows ◽  
Anesthetic Agents ◽  
Regional Blood Flows ◽  
Peripheral Arterial

There has been an explosive increase in the amount of interesting information about the physiologic and pathophysiologic roles of nitric oxide in cardiovascular, nervous, and immune systems. The possible involvement of the nitric oxide-cyclic guanosine monophosphate pathway in the effects of anesthetic agents has been the focus of many investigators. Relaxations of cerebral and peripheral arterial smooth muscle as well as increases in cerebral and other regional blood flows induced by anesthetic agents are mediated mainly via nitric oxide released from the endothelium and/or the nitrergic nerve and also via prostaglandin I2 or endothelium-derived hyperpolarizing factor. Preconditioning with volatile anesthetics protects against ischemia-reperfusion-induced myocardial dysfunction and cell death or neurotoxicity, possibly through nitric oxide release. Inhibition of nitric oxide synthase decreases the anesthetic requirement. Involvement of nitric oxide in the effects of volatile, intravenous, and local anesthetics differs. This review article includes a summary of information about the sites and mechanisms by which various anesthetic agents interact with the nitric oxide-cyclic guanosine monophosphate system.

Nitric oxide donor stimulated increase of cyclic GMP in the goldfish retina

2001 ◽  
Vol 18 (6) ◽  
pp. 849-856 ◽  
Author(s):  
WILLIAM H. BALDRIDGE ◽  
ANDY J. FISCHER
Keyword(s):  
Nitric Oxide ◽  
Optic Nerve ◽  
Ganglion Cells ◽  
Soluble Guanylyl Cyclase ◽  
Cyclic Guanosine Monophosphate ◽  
Guanosine Monophosphate ◽  
Nitric Oxide Donor ◽  
No Donor ◽  
Intracellular Signalling Pathway ◽  
Teleost Retina

Nitric oxide (NO) activates soluble guanylyl cyclase (sGC) and the resulting increase in cyclic guanosine monophosphate (cGMP) is an important intracellular signalling pathway in the vertebrate retina. Immunocytochemical detection of cGMP following exposure to NO donors has proven an effective method of identifying cells that express sGC. While such an approach has proven useful for the study of several vertebrate retinas, it has not been applied to the well-characterized teleost retina. Therefore, in the present study, we have applied this approach to the retina of the goldfish (Carassius auratus). In the presence of the phosphodiesterase (PDE) inhibitor 3-isobutyl-1-methylxanthine (IBMX), incubation of goldfish eyecups in Ringer's solution containing (±)-S-nitroso-N-acetylpenicillamine (SNAP) increased cGMP-like immunoreactivity (cG-ir) in bipolar, horizontal, amacrine, and ganglion cells and in ganglion cell axons and optic nerve. Weak labeling was observed in horizontal cells but no change in cG-ir was noted within photoreceptors. The NO donor-stimulated increases of cG-ir in horizontal, bipolar, amacrine, and ganglion cells are consistent with known physiological effects of NO on these neurons. The physiological significance of NO action at the level of optic nerve is not known. The lack of an effect of SNAP on cG-ir in photoreceptors was unexpected, as there are known physiological actions of NO, mediated by cGMP, on these neurons. Although this may be due to insufficient sensitivity of immunolabeling, this result may indicate a difference between isoforms of sGC or cGMP PDE in these neurons, compared to neurons where exogenous NO increased cG-ir.

scholarly journals Nitric Oxide-cGMP Signaling in Hypertension

Hypertension ◽  
2020 ◽  
Vol 76 (4) ◽  
pp. 1055-1068
Author(s):  
Ehsan Ataei Ataabadi ◽  
Keivan Golshiri ◽  
Annika Jüttner ◽  
Guido Krenning ◽  
A.H. Jan Danser ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Drug Targets ◽  
Soluble Guanylyl Cyclase ◽  
Cyclic Guanosine Monophosphate ◽  
Guanosine Monophosphate ◽  
Protein Kinase G ◽  
Current Status ◽  
Systemic Hypertension ◽  
Pharmacological Intervention ◽  
Cgmp Signaling

For the treatment of systemic hypertension, pharmacological intervention in nitric oxide-cyclic guanosine monophosphate signaling is a well-explored but unexploited option. In this review, we present the identified drug targets, including oxidases, mitochondria, soluble guanylyl cyclase, phosphodiesterase 1 and 5, and protein kinase G, important compounds that modulate them, and the current status of (pre)clinical development. The mode of action of these compounds is discussed, and based upon this, the clinical opportunities. We conclude that drugs that directly target the enzymes of the nitric oxide-cyclic guanosine monophosphate cascade are currently the most promising compounds, but that none of these compounds is under investigation as a treatment option for systemic hypertension.

scholarly journals Methanolic Extract ofClinacanthus nutansExerts Antinociceptive Activity via the Opioid/Nitric Oxide-Mediated, but cGMP-Independent, Pathways

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Mohammad Hafiz Abdul Rahim ◽  
Zainul Amiruddin Zakaria ◽  
Mohd Hijaz Mohd Sani ◽  
Maizatul Hasyima Omar ◽  
Yusnita Yakob ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Antinociceptive Effect ◽  
Soluble Guanylyl Cyclase ◽  
Cyclic Guanosine Monophosphate ◽  
Guanosine Monophosphate ◽  
Antinociceptive Activity ◽  
Opioid Antagonist ◽  
Clinacanthus Nutans ◽  
Synthase Inhibitor

The objectives of the present study were to determine the mechanisms of antinociceptive effect of methanol extract ofClinacanthus nutans(Acanthaceae) leaves (MECN) using various animal nociceptive models. The antinociceptive activity of orally administered 10% DMSO, 100 mg/kg acetylsalicylic acid (ASA), 5 mg/kg morphine, or MECN (100, 250, and 500 mg/kg) was determined using the acetic acid-induced abdominal constriction (ACT), formalin-induced paw licking (FT), and hot plate tests (HPT). The role of opioid and nitric oxide/cyclic guanosine monophosphate (NO/cGMP) systems was also investigated. The results showed that MECN produced a significant (p<0.05) antinociceptive response in all nociceptive models with the recordedED50value of 279.3 mg/kg for the ACT, while, for the early and late phases of the FT, the value was >500 mg/kg or 227.7 mg/kg, respectively. This antinociceptive activity was fully antagonized by naloxone (a nonselective opioid antagonist) but was partially reversed byL-arginine (L-arg; a nitric oxide [NO] precursor), Nω-nitro-L-arginine methyl ester hydrochloride (L-NAME; an NO synthase inhibitor), or their combinations thereof. In contrast, 1H-[1,2,4]oxadiazole[4,3-a]quinoxalin-1-one (ODQ; a soluble guanylyl cyclase inhibitor) enhanced the extract’s antinociception. UHPLC analysis revealed the presence of several flavonoid-based compounds with antinociceptive action. In conclusion, MECN exerted the peripherally and centrally mediated antinociceptive activity via the modulation of the opioid/NO-mediated, but cGMP-independent, systems.

scholarly journals Pregnancy alters nitric oxide synthase and natriuretic peptide systems in the rat left ventricle

2005 ◽  
Vol 184 (1) ◽  
pp. 209-217 ◽  
Author(s):  
M Jankowski ◽  
D Wang ◽  
S Mukaddam-Daher ◽  
J Gutkowska
Keyword(s):  
Nitric Oxide ◽  
Nitric Oxide Synthase ◽  
Left Ventricle ◽  
Natriuretic Peptide ◽  
Control Level ◽  
Soluble Guanylyl Cyclase ◽  
Cyclic Guanosine Monophosphate ◽  
Guanosine Monophosphate ◽  
Sprague Dawley ◽  
Oxide Synthase

Cyclic guanosine monophosphate (cGMP), which is implicated in cardiac cell growth and function, is synthesized by cytoplasmic soluble guanylyl cyclase (GC) stimulated via nitric oxide (NO) and by particulate membrane-bound GC activated via natriuretic peptides. We investigated possible cGMP elevation in the left ventricle (LV) of rats developing physiologic LV hypertrophy during gestation. Furthermore, expression of estrogen receptors (ER) and oxytocin receptors (OTR) was evaluated because their activation stimulates NO and atrial natriuretic peptide (ANP) release from the heart. Compared with nonpregnant controls, Sprague-Dawley rats on day 7 of gestation had similar heart weights, but, on days 14 and 21, ventricular mass increased by 12% and 28% respectively (P< 0.05). LV cGMP concentration was elevated at day 14 of gestation (3.25 ± 0.12 vs 4.65 ± 0.17 pmol/g wet weight, P< 0.01) but decreased at day 21 (2.45 ± 0.09 pmol/g, P< 0.05) to increase again on postpartum day 1 (6.01 ± 0.15 pmol/g) and day 4 (9.21 ± 1.79 pmol/g). Changes in endothelial nitric oxide synthase (eNOS), inducible NOS (iNOS), OTR and ERα, but not ERβ, proteins paralleled the pregnancy-related cGMP changes in the LV. In contrast, ANP mRNA of the LV remained at control level throughout gestation but increased postpartum, whereas brain natriuretic peptide (BNP) expression declined at term and increased postpartum. The particulate GC natriuretic peptide receptors (GC-A and GC-B) transcripts were already lower at day 14 of gestation. Natriuretic peptide clearance receptor (NPR-C) transcript was not altered on days 7 and 14, but increased at term. We conclude that cGMP concentration in the rat LV is influenced by both NOS and natriuretic peptide systems and may be involved in the changes of LV contractility and hypertrophy that occur during rat gestation.

scholarly journals Homogeneous single-label cGMP detection platform for the functional study of nitric oxide-sensitive (soluble) guanylyl cyclases and cGMP-specific phosphodiesterases

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Kari Kopra ◽  
Iraida Sharina ◽  
Emil Martin ◽  
Harri Härmä
Keyword(s):  
Nitric Oxide ◽  
High Throughput Screening ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Soluble Guanylyl Cyclase ◽  
Cyclic Guanosine Monophosphate ◽  
Guanosine Monophosphate ◽  
Functional Study ◽  
Cgmp Level ◽  
Sgc Activators

Abstract Cardiovascular diseases are the number one death worldwide. Nitric oxide (NO)—NO-sensitive (soluble) guanylyl cyclase (sGC)—cyclic guanosine monophosphate (cGMP) pathway regulates diverse set of important physiological functions, including maintenance of cardiovascular homeostasis. Resting and activated sGC enzyme converts guanosine triphosphate to an important second messenger cGMP. In addition to traditional NO generators, a number of sGC activators and stimulators are currently in clinical trials aiming to support or increase sGC activity in various pathological conditions. cGMP-specific phosphodiesterases (PDEs), which degrade cGMP to guanosine monophosphate, play key role in controlling the cGMP level and the strength or length of the cGMP-dependent cellular signaling. Thus, PDE inhibitors also have clear clinical applications. Here, we introduce a homogeneous quenching resonance energy transfer (QRET) for cGMP to monitor both sGC and PDE activities using high throughput screening adoptable method. We demonstrate that using cGMP-specific antibody, sGC or PDE activity and the effect of small molecules modulating their function can be studied with sub-picomole cGMP sensitivity. The results further indicate that the method is suitable for monitoring enzyme reactions also in complex biological cellular homogenates and mixture.

scholarly journals Nitric Oxide Suppresses the Expression of Bcl-2 Binding Protein BNIP3 in Hepatocytes

2001 ◽  
Vol 276 (50) ◽  
pp. 46887-46895 ◽  
Author(s):  
Ruben Zamora ◽  
Louis Alarcon ◽  
Yoram Vodovotz ◽  
Binnie Betten ◽  
Peter K. M. Kim ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Cultured Cells ◽  
Binding Protein ◽  
Soluble Guanylyl Cyclase ◽  
Cyclic Guanosine Monophosphate ◽  
Guanosine Monophosphate ◽  
Northern Analysis ◽  
No Production ◽  
No Donor ◽  
Factor Α

Nitric oxide (NO) is not only an important signaling molecule, but it also regulates the expression of a number of genes in the liver. We have previously shown that apoptosis in hepatocytes exposed to tumor necrosis factor-α and actinomycin D is prevented by NO derived from the inducible nitric-oxide synthase (iNOS), by mechanisms that are both dependent on and independent of modulation of cyclic guanosine monophosphate (cGMP) subsequent to activation of soluble guanylyl cyclase (sGC). We hypothesize that one mechanism by which NO exerts these effects is by regulating the expression of genes involved in apoptosis. We used differential display-polymerase chain reaction to isolate NO-regulated genes in hepatocytes fromiNOSknockout mice (to eliminate endogenous inducible NO production). Using this analysis, we identified a NO-suppressed gene fragment homologous with the pro-apoptotic Bcl-2 binding protein BNIP3. Northern analysis confirmed the NO-dependent suppression ofBNIP3in cultured cells. Similarly, the NO donorS-nitroso-N-acetyl-dl-penicillamine (1–1000 μm) down-regulated the expression ofBNIP3in bothiNOSknockout and wild-type hepatocytes. This effect of NO was reversed by the sGC inhibitor 1H-(1,2,4)-oxadiazole[4,3-a]quinoxalon-1-one (ODQ),suggesting the involvement of the sGC/cGMP pathway in the modulation of BNIP3 by NO. We propose that suppression of BNIP3 expression is one sGC/cGMP-dependent mechanism by which NO might affect the process of hepatocyte apoptosis.

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