Angiotensin II type 1 receptor-mediated inhibition of K+ channel subunit kv2.2 in brain stem and hypothalamic neurons.

Abstract:

:Angiotensin II (Ang II) has powerful modulatory actions on cardiovascular function that are mediated by specific receptors located on neurons within the hypothalamus and brain stem. Incubation of neuronal cocultures of rat hypothalamus and brain stem with Ang II elicits an Ang II type 1 (AT1) receptor-mediated inhibition of total outward K+ current that contributes to an increase in neuronal firing rate. However, the exact K+ conductance(s) that is inhibited by Ang II are not established. Pharmacological manipulation of total neuronal outward K+ current revealed a component of K+ current sensitive to quinine, tetraethylammonium, and 4-aminopyridine, with IC50 values of 21.7 micromol/L, 1.49 mmol/L, and 890 micromol/L, respectively, and insensitive to alpha-dendrotoxin (100 to 500 nmol/L), charybdotoxin (100 to 500 nmol/L), and mast cell degranulating peptide (1 micromol/L). Collectively, these data suggest the presence of Kv2.2 and Kv3.1b. Biophysical examination of the quinine-sensitive neuronal K+ current demonstrated a macroscopic conductance with similar biophysical properties to those of Kv2.2 and Kv3.1b. Ang II (100 nmol/L), in the presence of the AT2 receptor blocker PD123,319, elicited an inhibition of neuronal K+ current that was abolished by quinine (50 micromol/L). Reverse transcriptase-polymerase chain reaction analysis confirmed the presence of Kv2.2 and Kv3.1b mRNA in these neurons. However, Western blot analyses demonstrated that only Kv2.2 protein was present. Coexpression of Kv2.2 and the AT1 receptor in Xenopus oocytes demonstrated an Ang II-induced inhibition of Kv2.2 current. Therefore, these data suggest that inhibition of Kv2.2 contributes to the AT1 receptor-mediated reduction of neuronal K+ current and subsequently to the modulation of cardiovascular function.

journal_name

Circ Res

journal_title

Circulation research

authors

Gelband CH,Warth JD,Mason HS,Zhu M,Moore JM,Kenyon JL,Horowitz B,Sumners C

doi

10.1161/01.res.84.3.352

subject

Has Abstract

pub_date

1999-02-19 00:00:00

pages

352-9

issue

3

eissn

0009-7330

issn

1524-4571

journal_volume

84

pub_type

杂志文章
  • Pericyte progenitors at the crossroads between fibrosis and regeneration.

    abstract::Tissue repair after injury is generally inversely related to the extent of scarring, suggesting the possibility that regeneration could be promoted by interventions that inhibit scar formation. New work by Dulauroy et al has identified a myofibroblast progenitor with pericyte characteristics as an important mediator o...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/CIRCRESAHA.111.300287

    authors: Steinhauser ML,Lee RT

    更新日期:2013-01-18 00:00:00

  • Tra2beta as a novel mediator of vascular smooth muscle diversification.

    abstract::Transformer splicing regulatory proteins determine the sexually dimorphic traits of Drosophila. The role of the vertebrate homologs of Tra-2 in phenotypic specification is undefined. We are using the alternative splicing of the MYPT1 E23 exon as a model for the study of smooth muscle diversification into fast and slow...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/CIRCRESAHA.108.178384

    authors: Shukla S,Fisher SA

    更新日期:2008-08-29 00:00:00

  • Mechanisms that regulate macrophage burden in atherosclerosis.

    abstract::Mononuclear phagocytes (MPs) relevant to atherosclerosis include monocytes, macrophages, and dendritic cells. A decade ago, studies on macrophage behavior in atherosclerotic lesions were often limited to quantification of total macrophage area in cross-sections of plaques. Although technological advances are still nee...

    journal_title:Circulation research

    pub_type: 杂志文章,评审

    doi:10.1161/CIRCRESAHA.114.301174

    authors: Randolph GJ

    更新日期:2014-05-23 00:00:00

  • Mechanisms responsible for the heterogeneous coronary microvascular response to nitroglycerin.

    abstract::Nitroglycerin dilates large (greater than or equal to 100 microns) but not small coronary arterial microvessels, and a putative metabolite of nitroglycerin, S-nitroso-L-cysteine, has been shown in vitro to dilate both large and small coronary microvessels. Based on this evidence, we tested the hypothesis that the lack...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.res.68.3.847

    authors: Kurz MA,Lamping KG,Bates JN,Eastham CL,Marcus ML,Harrison DG

    更新日期:1991-03-01 00:00:00

  • Effects of acute, passive hepatic congestion on blood flow and oxygen uptake in the intact liver of the cat.

    abstract::Raising the hepatic venous pressure experimentally duplicates the type of hepatic congestion seen in many clinical situations including congestive heart failure. Venous pressure was controlled using a hepatic venous long circuit preparation and was raised by 6 cm blood (4.7 mm Hg) or 10 cm (7.8 mm Hg). Total splanchni...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.res.41.6.787

    authors: Lautt WW

    更新日期:1977-12-01 00:00:00

  • Free radicals, mitochondria, and oxidized lipids: the emerging role in signal transduction in vascular cells.

    abstract::Mitochondria have long been known to play a critical role in maintaining the bioenergetic status of cells under physiological conditions. It was also recognized early in mitochondrial research that the reduction of oxygen to generate the free radical superoxide occurs at various sites in the respiratory chain and was ...

    journal_title:Circulation research

    pub_type: 杂志文章,评审

    doi:10.1161/01.RES.0000248212.86638.e9

    authors: Gutierrez J,Ballinger SW,Darley-Usmar VM,Landar A

    更新日期:2006-10-27 00:00:00

  • Peroxisome proliferator-activated receptors and atherogenesis: regulators of gene expression in vascular cells.

    abstract::A large body of data gathered over the past couple of years has identified the peroxisome proliferator-activated receptors (PPAR) alpha, gamma, and beta/delta as transcription factors exerting modulatory actions in vascular cells. PPARs, which belong to the nuclear receptor family of ligand-activated transcription fac...

    journal_title:Circulation research

    pub_type: 杂志文章,评审

    doi:10.1161/01.RES.0000127122.22685.0A

    authors: Marx N,Duez H,Fruchart JC,Staels B

    更新日期:2004-05-14 00:00:00

  • Baseline Immunoglobulin E Levels as a Marker of Doxorubicin- and Trastuzumab-Associated Cardiac Dysfunction.

    abstract:RATIONALE:There is a critical need to develop robust, mechanistic strategies to identify patients at increased risk of cancer therapeutics-related cardiac dysfunction (CTRCD). OBJECTIVE:We aimed to discover new biomarkers associated with doxorubicin- and trastuzumab-induced CTRCD using high-throughput proteomic profil...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/CIRCRESAHA.116.309004

    authors: Beer LA,Kossenkov AV,Liu Q,Luning Prak E,Domchek S,Speicher DW,Ky B

    更新日期:2016-10-28 00:00:00

  • Vanadate effect on the Na,K-ATPase and the Na-K pump in in vitro-grown rat vascular smooth muscle cells.

    abstract::The impact of vanadate on the Na,K-ATPase system in the vascular smooth muscle cell is poorly understood. The present study describes the kinetics of the effect of vanadate on Na,K-ATPase and the Na-K pump in in vitro grown rat VSMC's. Vanadate interaction with the Na,K-ATPase system in vascular smooth muscle cells wa...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.res.53.2.186

    authors: Searle BM,Higashino H,Khalil F,Bogden JD,Tokushige A,Tamura H,Kino M,Aviv A

    更新日期:1983-08-01 00:00:00

  • Phosphoinositide 3-kinase mediates enhanced spontaneous and agonist-induced contraction in aorta of deoxycorticosterone acetate-salt hypertensive rats.

    abstract::Arteries from deoxycorticosterone acetate (DOCA)-salt and N(omega)-nitro-L-arginine (L-NNA) hypertensive but not normotensive rats develop spontaneous tone. LY294002 and wortmannin, phosphoinositide 3-kinase (PI3-kinase) inhibitors, eliminate spontaneous tone. We hypothesized that PI3-kinase protein and/or activity wa...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.res.0000030861.13850.f1

    authors: Northcott CA,Poy MN,Najjar SM,Watts SW

    更新日期:2002-08-23 00:00:00

  • Progenitor Cells and Clinical Outcomes in Patients With Acute Coronary Syndromes.

    abstract:RATIONALE:Circulating progenitor cells (CPCs) mobilize in response to ischemic injury, but their predictive value remains unknown in acute coronary syndrome (ACS). OBJECTIVE:We aimed to investigate the number of CPCs in ACS compared with those with stable coronary artery disease (CAD), relationship between bone marrow...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/CIRCRESAHA.118.312821

    authors: Samman Tahhan A,Hammadah M,Raad M,Almuwaqqat Z,Alkhoder A,Sandesara PB,Mohamed-Kelli H,Hayek SS,Kim JH,O'Neal WT,Topel ML,Grant AJ,Sabbak N,Heinl RE,Gafeer MM,Obideen M,Kaseer B,Abdelhadi N,Ko YA,Liu C,Hesaroieh I

    更新日期:2018-05-25 00:00:00

  • Effects of infarcted myocardium on regional blood flow measurements to ischemic regions in canine heart.

    abstract::The present study assesses effects of acutely infarcted myocardium on apparent microsphere loss as a function of time, determines effects of apparent microsphere loss on blood flow measurements to ischemic regions, and determines to what extent apparent microsphere loss alters interpretation of serial measurements of ...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.res.47.5.701

    authors: Murdock RH Jr,Cobb FR

    更新日期:1980-11-01 00:00:00

  • Stimulation of fibroblast collagen and total protein formation by an endothelial cell-derived factor.

    abstract::We investigated the effect of medium conditioned by bovine aortic endothelial cells on collagen accumulation and total protein formation by human embryonic fibroblasts or bovine smooth muscle cells in cultures. The conditioned medium at a 1:10 dilution induced a twofold increase in collagen and total protein accumulat...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.res.69.1.134

    authors: Villanueva AG,Farber HW,Rounds S,Goldstein RH

    更新日期:1991-07-01 00:00:00

  • Changes in extracellular and intracellular pH in ischemic rabbit papillary muscle.

    abstract::The extracellular pH (pHo) and intracellular pH (pHi) were simultaneously measured with H(+)-sensitive microelectrodes in the rabbit papillary muscle during normal arterial perfusion and no-flow ischemia. The preparation was kept in an artificial gaseous atmosphere (N2 and CO2 during ischemia) without a surrounding fl...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.res.71.2.460

    authors: Yan GX,Kléber AG

    更新日期:1992-08-01 00:00:00

  • Cardiac sympathetic afferent cell bodies are located in the peripheral nervous system of the cat.

    abstract::Studies of the stellate ganglion and middle cervical ganglion indicate that sympathetic efferent nerve activity can be modified by peripheral excitatory inputs and that these neural connections may function as pathways for a peripheral reflex at the level of the thoracic sympathetic ganglia. This excitatory synaptic i...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.res.64.3.554

    authors: Bosnjak ZJ,Kampine JP

    更新日期:1989-03-01 00:00:00

  • Developmental changes in the sensitivity of the chick embryo ventricle to beta-adrenergic agonist during adrenergic innervation.

    abstract::As early as the 4th embryonic day, the ventricle of the chick embryo responded to isoproterenol (Iso) with an increase in the force of contraction; at all ages studied, this positive inotropic effect was accompanied by an increased rate of tension development. There was a transient, 10-fold decrease in the sensitivity...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.res.48.2.245

    authors: Higgins D,Pappano AJ

    更新日期:1981-02-01 00:00:00

  • Cardioprotection of preconditioning by metabolic inhibition in the rat ventricular myocyte. Involvement of kappa-opioid receptor.

    abstract::To determine whether opioid receptors (ORs) are involved in the delayed cardioprotection of ischemic preconditioning (IP), the effect of severe metabolic inhibition (MI) with a glucose-free buffer that contained sodium cyanide and 2-deoxy-D-glucose on the viability of isolated rat ventricular myocytes was first determ...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.res.84.12.1388

    authors: Wu S,Li HY,Wong TM

    更新日期:1999-06-25 00:00:00

  • Histone deacetylase 7 controls endothelial cell growth through modulation of beta-catenin.

    abstract:RATIONALE:Histone deacetylase (HDAC)7 is expressed in the early stages of embryonic development and may play a role in endothelial function. OBJECTIVE:This study aimed to investigate the role of HDAC7 in endothelial cell (EC) proliferation and growth and the underlying mechanism. METHODS AND RESULTS:Overexpression of...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/CIRCRESAHA.109.213165

    authors: Margariti A,Zampetaki A,Xiao Q,Zhou B,Karamariti E,Martin D,Yin X,Mayr M,Li H,Zhang Z,De Falco E,Hu Y,Cockerill G,Xu Q,Zeng L

    更新日期:2010-04-16 00:00:00

  • Pulse pressure-related changes in coronary flow in vivo are modulated by nitric oxide and adenosine.

    abstract::Acute increases in arterial pulsatile load imposed on the left ventricle can increase coronary flow without commensurate changes in myocardial oxygen consumption. One explanation is that augmenting pulsatile perfusion at the same mean pressure itself stimulates flow by releasing endothelium-mediated vasorelaxant facto...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.res.79.4.849

    authors: Recchia FA,Senzaki H,Saeki A,Byrne BJ,Kass DA

    更新日期:1996-10-01 00:00:00

  • High-Density Lipoprotein Carries Markers That Track With Recovery From Stroke.

    abstract:RATIONALE:Prospective cohort studies question the value of HDL-C (high-density lipoprotein cholesterol) for stroke risk prediction. OBJECTIVE:Investigate the relationship between long-term functional recovery and HDL proteome and function. METHODS AND RESULTS:Changes in HDL protein composition and function (cholester...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/CIRCRESAHA.120.316526

    authors: Plubell DL,Fenton AM,Rosario S,Bergstrom P,Wilmarth PA,Clark WM,Zakai NA,Quinn JF,Minnier J,Alkayed NJ,Fazio S,Pamir N

    更新日期:2020-10-23 00:00:00

  • MicroRNA-103/107 Regulate Programmed Necrosis and Myocardial Ischemia/Reperfusion Injury Through Targeting FADD.

    abstract:RATIONALE:Necrosis is one of the main forms of cardiomyocyte death in heart disease. Recent studies have demonstrated that certain types of necrosis are regulated and programmed dependent on the activation of receptor-interacting serine/threonine-protein kinase (RIPK) 1 and 3 which may be negatively regulated by Fas-as...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/CIRCRESAHA.117.305781

    authors: Wang JX,Zhang XJ,Li Q,Wang K,Wang Y,Jiao JQ,Feng C,Teng S,Zhou LY,Gong Y,Zhou ZX,Liu J,Wang JL,Li PF

    更新日期:2015-07-31 00:00:00

  • Block of sodium current by heptanol in voltage-clamped canine cardiac Purkinje cells.

    abstract::Heptanol blocks sodium current (INa) in nerve, but its effects on cardiac INa have not been well characterized. Block of INa by heptanol was studied in 16 internally perfused voltage-clamped cardiac Purkinje cells at reduced Na+ (45 mM outside, 0 mM inside). Heptanol block of peak sodium conductance was well described...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.res.68.4.977

    authors: Nelson WL,Makielski JC

    更新日期:1991-04-01 00:00:00

  • Arrhythmogenesis in catecholaminergic polymorphic ventricular tachycardia: insights from a RyR2 R4496C knock-in mouse model.

    abstract::Catecholaminergic polymorphic ventricular tachycardia (CPVT) is an inherited disease characterized by life threatening arrhythmias and mutations in the gene encoding the ryanodine receptor (RyR2). Disagreement exists on whether (1) RyR2 mutations induce abnormal calcium transients in the absence of adrenergic stimulat...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.RES.0000235869.50747.e1

    authors: Liu N,Colombi B,Memmi M,Zissimopoulos S,Rizzi N,Negri S,Imbriani M,Napolitano C,Lai FA,Priori SG

    更新日期:2006-08-04 00:00:00

  • Redox regulation of mitochondrial ATP synthase: implications for cardiac resynchronization therapy.

    abstract:RATIONALE:Cardiac resynchronization therapy (CRT) is an effective clinical treatment for heart failure patients with conduction delay, impaired contraction, and energetics. Our recent studies have revealed that mitochondrial posttranslational modifications (PTM) may contribute to its benefits, motivating the present st...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/CIRCRESAHA.111.246124

    authors: Wang SB,Foster DB,Rucker J,O'Rourke B,Kass DA,Van Eyk JE

    更新日期:2011-09-16 00:00:00

  • Oxidative stress-dependent sphingosine kinase-1 inhibition mediates monoamine oxidase A-associated cardiac cell apoptosis.

    abstract::The mitochondrial enzyme monoamine oxidase (MAO), its isoform MAO-A, plays a major role in reactive oxygen species-dependent cardiomyocyte apoptosis and postischemic cardiac damage. In the current study, we investigated whether sphingolipid metabolism can account for mediating MAO-A- and reactive oxygen species-depend...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.RES.0000253900.66640.34

    authors: Pchejetski D,Kunduzova O,Dayon A,Calise D,Seguelas MH,Leducq N,Seif I,Parini A,Cuvillier O

    更新日期:2007-01-05 00:00:00

  • Hypoxia and hypoxia/reoxygenation activate Raf-1, mitogen-activated protein kinase kinase, mitogen-activated protein kinases, and S6 kinase in cultured rat cardiac myocytes.

    abstract::In response to hypoxia and reoxygenation, mammalian cells are known to express a variety of genes to adapt to these external stresses or lead to further cell damage. We investigated the intracellular signaling cascades in cultured rat cardiac myocytes subjected to hypoxia followed by reoxygenation (hypoxia/reoxygenati...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.res.78.1.82

    authors: Seko Y,Tobe K,Ueki K,Kadowaki T,Yazaki Y

    更新日期:1996-01-01 00:00:00

  • Reduced myocardial reflow and increased coronary vascular resistance following prolonged myocardial ischemia in the dog.

    abstract::Studies were performed to determine whether an alteration in coronary vascular resistance and a reduction in the reflow phenomenon occurred in the blood-perfused, heparinized canine heart after various periods of myocaridal ischemia. Regional myocardial blood flow was measured with radioactive microspheres. Proximal l...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.res.36.6.771

    authors: Willerson JT,Watson JT,Hutton I,Templeton GH,Fixler DE

    更新日期:1975-06-01 00:00:00

  • Thrombin induces the preproendothelin-1 gene in endothelial cells by a protein tyrosine kinase-linked mechanism.

    abstract::Thrombin stimulates synthesis and secretion of endothelin-1 (ET-1), a vasoactive peptide that triggers responses in the vascular endothelium and smooth muscle. We investigated the signal transduction pathways by which thrombin stimulates preproET-1 gene expression and ET-1 peptide secretion in macrovascular cells (hum...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.res.76.6.987

    authors: Marsen TA,Simonson MS,Dunn MJ

    更新日期:1995-06-01 00:00:00

  • Changes in vascular capacity in awake dogs in response to carotid sinus occlusion and administration of catecholamines.

    abstract::Changes in cardiac filling pressure (central venous pressure) were measured following carotid occlusion and infusions of catecholamines in awake dogs while cardiac output was held constant. After carotid occlusion in dogs with vagi blocked, central venous pressure increased about 0.8 mm Hg (an estimated decrease in va...

    journal_title:Circulation research

    pub_type: 杂志文章

    doi:10.1161/01.res.55.4.440

    authors: Bennett TD,Wyss CR,Scher AM

    更新日期:1984-10-01 00:00:00

  • Cholinergic constriction in the general circulation and its role in coronary artery spasm.

    abstract::The release of acetylcholine from autonomic nerves in those tissues that receive a cholinergic innervation is widely believed to dilate blood vessels. Exogenously administered acetylcholine in vivo does dilate vascular beds and produce hypotension; however, this latter effect is indirect and probably the result of lib...

    journal_title:Circulation research

    pub_type: 杂志文章,评审

    doi:10.1161/01.res.65.2.237

    authors: Kalsner S

    更新日期:1989-08-01 00:00:00