Actions of vasoactive intestinal peptide and neuropeptide Y on the pacemaker current in canine Purkinje fibers.

abstract：:The 2-amino-3-benzoylthiophene derivative PD 81,723 is an allosteric enhancer of agonist binding to brain A1 adenosine receptors. One aim of this study was to characterize and contrast the effects of PD 81,723 on the A1 receptor-mediated negative dromotropic and A2a receptor-mediated vasodilatory actions of adenosine ...

journal_title：Circulation research

authors： Kollias-Baker C,Ruble J,Dennis D,Bruns RF,Linden J,Belardinelli L

更新日期：1994-12-01 00:00:00

abstract：:During periodic stimulation of spontaneously beating chick heart cell aggregates, there is often an evolution of coupling patterns between the stimulator and the aggregate action potential. For example, at rapid stimulation frequencies, a rhythm that is initially 1:1 (stimulus frequency:aggregate frequency) can evolve...

journal_title：Circulation research

authors： Zeng WZ,Glass L,Shrier A

更新日期：1991-10-01 00:00:00

abstract：:Acetylcholine (ACh) evokes the conduction of vasodilation along resistance microvessels. However, it is not known which cell layer (endothelium or smooth muscle) serves as the conduction pathway. In isolated, cannulated feed arteries ( approximately 70 microm in diameter at 75 mm Hg; length approximately 4 mm) of the ...

journal_title：Circulation research

authors： Emerson GG,Segal SS

更新日期：2000-01-07 00:00:00

abstract：:Lipid rafts are discrete membrane subdomains rich in sphingolipids and cholesterol. In ventricular myocytes a function of caveolae, a type of lipid rafts, is to concentrate in close proximity several proteins of the beta-adrenergic transduction pathway. We have investigated the subcellular localization of HCN4 channel...

journal_title：Circulation research

authors： Barbuti A,Gravante B,Riolfo M,Milanesi R,Terragni B,DiFrancesco D

更新日期：2004-05-28 00:00:00

abstract：:Stem cells can differentiate into a variety of cells to replace dead cells or to repair damaged tissues. Recent evidence indicates that stem cells are involved in the pathogenesis of transplant arteriosclerosis, an alloimmune initiated vascular stenosis that often results in transplant organ failure. Although the path...

journal_title：Circulation research

authors： Xu Q

更新日期：2008-05-09 00:00:00

abstract：RATIONALE:Closure of the ductus arteriosus (DA) is essential for the transition from fetal to neonatal patterns of circulation. Initial PO2-dependent vasoconstriction causes functional DA closure within minutes. Within days a fibrogenic, proliferative mechanism causes anatomic closure. Though modulated by endothelial-d...

journal_title：Circulation research

authors： Hong Z,Kutty S,Toth PT,Marsboom G,Hammel JM,Chamberlain C,Ryan JJ,Zhang HJ,Sharp WW,Morrow E,Trivedi K,Weir EK,Archer SL

更新日期：2013-03-01 00:00:00

abstract：:Although functional coupling between protein kinase Cepsilon (PKCepsilon) and mitochondria has been implicated in the genesis of cardioprotection, the signal transduction mechanisms that enable this link and the identities of the mitochondrial proteins modulated by PKCepsilon remain unknown. Based on recent evidence t...

journal_title：Circulation research

authors： Baines CP,Song CX,Zheng YT,Wang GW,Zhang J,Wang OL,Guo Y,Bolli R,Cardwell EM,Ping P

更新日期：2003-05-02 00:00:00

abstract：:Myocardial stunning is characterized by decreased myofilament Ca2+ responsiveness. To investigate the molecular basis of stunned myocardium, we performed PAGE and Western immunoblot analysis of the contractile proteins. Isolated rat hearts were retrogradely perfused at 37 degrees C for either 50 minutes (control group...

journal_title：Circulation research

authors： Gao WD,Atar D,Liu Y,Perez NG,Murphy AM,Marban E

更新日期：1997-03-01 00:00:00

abstract：:Many cell types undergo apoptosis under conditions of ischemia. Little is known, however, about the molecular pathways that mediate this response. A cellular and biochemical approach to elucidate such signaling pathways was undertaken in primary cultures of cardiac myocytes, a cell type that is especially sensitive to...

journal_title：Circulation research

authors： Bialik S,Cryns VL,Drincic A,Miyata S,Wollowick AL,Srinivasan A,Kitsis RN

更新日期：1999-09-03 00:00:00

abstract：RATIONALE:The recent discovery of meningeal lymphatics in mammals is reshaping our understanding of fluid homeostasis and cellular waste management in the brain, but visualization and experimental analysis of these vessels is challenging in mammals. Although the optical clarity and experimental advantages of zebrafish ...

journal_title：Circulation research

authors： Castranova D,Samasa B,Venero Galanternik M,Jung HM,Pham VN,Weinstein BM

更新日期：2021-01-08 00:00:00

abstract：:Sinus node recovery time was compared to the recovery time of a slow atrioventricular junctional rhythm in each of the same seven pentobarbital anesthetized dogs. Recovery time and the first five cardiac cycles were examined after pacing atria and ventricles for 20, 40, and 60 seconds at four or more pacing cycle leng...

journal_title：Circulation research

authors： Neely BH,Urthaler F,Hageman GR

更新日期：1985-07-01 00:00:00

abstract：:Cytokine activation of vascular endothelial cells renders the hyperadhesiveness for neutrophils. During the processes of inflammation and atherosclerosis, the production of reactive oxygen species by neutrophils contributes to endothelial cell (EC) damage and injury. However, the precise mechanisms for neutrophil acti...

journal_title：Circulation research

authors： Takahashi T,Hato F,Yamane T,Fukumasu H,Suzuki K,Ogita S,Nishizawa Y,Kitagawa S

更新日期：2001-03-02 00:00:00

abstract：:Increased activity of matrix metalloproteinases (MMPs) has been implicated in numerous disease processes, including tumor growth and metastasis, arthritis, and periodontal disease. It is now becoming increasingly clear that extracellular matrix degradation by MMPs is also involved in the pathogenesis of cardiovascular...

journal_title：Circulation research

authors： Creemers EE,Cleutjens JP,Smits JF,Daemen MJ

更新日期：2001-08-03 00:00:00

abstract：:3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase inhibitors (statins) can exert beneficial effects independently of serum cholesterol reduction by increasing the bioavailability of nitric oxide. However, it is unclear whether statins can exert such effects directly on cardiac myocytes and whether mitochondria...

journal_title：Circulation research

authors： Jones SP,Teshima Y,Akao M,Marbán E

更新日期：2003-10-17 00:00:00

abstract：:In isolated right atria of the rabbit heart, we studied the activation pattern within the sinus node, using the microelectrode technique. After the electrophysiological experiments, the preparations were subjected to a correlative morphological investigation, using light or electron microscopy. Different criteria for ...

journal_title：Circulation research

authors： Bleeker WK,Mackaay AJ,Masson-Pévet M,Bouman LN,Becker AE

更新日期：1980-01-01 00:00:00

abstract：RATIONALE:Smooth muscle precursor cells have previously been reported to reside in bone marrow and in the circulation, but little is currently known regarding the proximate stimuli for smooth muscle cell differentiation of these putative progenitors. OBJECTIVE:Because local thrombin generation occurs as an initial res...

journal_title：Circulation research

authors： Martin K,Weiss S,Metharom P,Schmeckpeper J,Hynes B,O'Sullivan J,Caplice N

更新日期：2009-07-31 00:00:00

abstract：:14-3-3 family members are dimeric phosphoserine-binding proteins that regulate signal transduction, apoptotic, and checkpoint control pathways. Targeted expression of dominant-negative 14-3-3eta (DN-14-3-3) to murine postnatal cardiac tissue potentiates Ask1, c-jun N-terminal kinase (JNK), and p38 mitogen-activated pr...

journal_title：Circulation research

authors： Zhang S,Ren J,Zhang CE,Treskov I,Wang Y,Muslin AJ

更新日期：2003-11-28 00:00:00

abstract：:The purpose of this study was to evaluate the limitations of the double sucrose gap voltage clamp technique in the determination of tension-voltage relationships for frog atrial muscle. Tension-voltage relationships were determined under two conditions. In one case we determined both the tension response and slow inwa...

journal_title：Circulation research

authors： Tarr M,Trank JW

更新日期：1976-07-01 00:00:00

abstract：:Recovery of postischemic function may be limited by energy synthesis by mitochondria, energy transfer via the creatine kinase reaction, or energy utilization at myofibrils. To identify the limiting step, we defined the relations among oxygen consumption, creatine kinase reaction velocity and cardiac performance in myo...

journal_title：Circulation research

authors： Neubauer S,Hamman BL,Perry SB,Bittl JA,Ingwall JS

更新日期：1988-07-01 00:00:00

abstract：:Ablation of the enzyme phosphoinositide 3-kinase (PI3K)gamma (PI3Kgamma(-/-)) in mice increases cardiac contractility by elevating intracellular cAMP and enhancing sarcoplasmic reticulum Ca(2+) handling. Because cAMP is a critical determinant of heart rate, we investigated whether heart rate is altered in mice lacking...

journal_title：Circulation research

authors： Rose RA,Kabir MG,Backx PH

更新日期：2007-12-07 00:00:00

abstract：:The relationship of P-wave polarity and morphology in leads II, III, and aVF to the sequence of atrial activation was studied in the canine heart when the atria were paced from the region of the sinus node or the posterior-inferior left atrium and when retrograde activation of the atria occurred with right ventricular...

journal_title：Circulation research

authors： Waldo AL,Vitikainen KJ,Hoffman BF

更新日期：1975-08-01 00:00:00

abstract：RATIONALE:Loss-of-function studies in cardiac myocytes (CMs) are currently limited by the need for appropriate conditional knockout alleles. The factors that regulate CM maturation are poorly understood. Previous studies on CM maturation have been confounded by heart dysfunction caused by whole organ gene inactivation....

journal_title：Circulation research

authors： Guo Y,VanDusen NJ,Zhang L,Gu W,Sethi I,Guatimosim S,Ma Q,Jardin BD,Ai Y,Zhang D,Chen B,Guo A,Yuan GC,Song LS,Pu WT

更新日期：2017-06-09 00:00:00

abstract：:Tissue factor (TF) is a low-molecular-weight glycoprotein that initiates the extrinsic clotting cascade and is considered a major regulator of arterial thrombogenicity. TF pathway inhibitor (TFPI) is a major physiological inhibitor of TF-initiated coagulation. The aim of this study was to define the complex interplay ...

journal_title：Circulation research

authors： Singh R,Pan S,Mueske CS,Witt T,Kleppe LS,Peterson TE,Slobodova A,Chang JY,Caplice NM,Simari RD

更新日期：2001-07-06 00:00:00

abstract：:[3H](+/-)Carazolol, a newly available beta-adrenergic receptor antagonist, can be used to characterize beta-adrenergic receptor subtypes present in membrane vesicles derived from canine ventricular myocardium and canine lung. [3H](+/-)Carazolol binding is saturable, of high affinity, and is displaceable by beta-adrene...

journal_title：Circulation research

authors： Manalan AS,Besch HR Jr,Watanabe AM

更新日期：1981-08-01 00:00:00

abstract：:The role of the Na+-Ca2+ exchanger as a major determinant of cell Ca2+ is well defined in cardiac tissue, and there has been much effort to develop specific inhibitors of the exchanger. We use a novel system to test the specificity of two putative specific inhibitors, KB-R7943 and SEA0400. The drugs are applied to ele...

journal_title：Circulation research

authors： Reuter H,Henderson SA,Han T,Matsuda T,Baba A,Ross RS,Goldhaber JI,Philipson KD

更新日期：2002-07-26 00:00:00

abstract：:We examined whether albumin-derived advanced glycosylation end products (AGEs) downregulate the expression of endothelial nitric oxide synthase (NOS). Significant reductions in NOS activity and cGMP levels in bovine aortic endothelial cells were observed when exposed to different concentrations of albumin-derived AGEs...

journal_title：Circulation research

authors： Rojas A,Romay S,González D,Herrera B,Delgado R,Otero K

更新日期：2000-02-18 00:00:00

abstract：:In patients with congestive heart failure, skeletal muscle is characterized by a smaller proportion of slow-twitch oxidative fibers and reduced oxidative enzyme activity. However, whether these changes result from disuse or occur as a direct consequence of heart failure is unresolved. To address this issue, 18 rats wi...

journal_title：Circulation research

authors： Simonini A,Long CS,Dudley GA,Yue P,McElhinny J,Massie BM

更新日期：1996-07-01 00:00:00

abstract：:Given the essential role played by gap junctions in the coordination of cardiac muscle contraction, it is plausible that down-regulation of gap junctional conduction is in part responsible for the contractile dysfunction observed in hypertrophied and failing hearts. In the present study, we analyzed the expression and...

journal_title：Circulation research

authors： Toyofuku T,Yabuki M,Otsu K,Kuzuya T,Tada M,Hori M

更新日期：1999-10-15 00:00:00

abstract：:Although morphological studies suggest that coronary vascular injury is a result of prolonged ischemia and subsequent reperfusion, whether functional coronary microvascular injury develops during brief in vivo ischemia is unclear. In other organs, permeability is a sensitive indicator of functional vascular injury. Th...

journal_title：Circulation research

authors： Dauber IM,VanBenthuysen KM,McMurtry IF,Wheeler GS,Lesnefsky EJ,Horwitz LD,Weil JV

更新日期：1990-04-01 00:00:00

abstract：:Blocking brain mineralocorticoid receptors (MRs) reduces the high circulating levels of tumor necrosis factor (TNF)-alpha in heart failure (HF) rats. TNF-alpha and other proinflammatory cytokines activate neurons in the paraventricular nucleus (PVN) of hypothalamus, including corticotropin-releasing hormone (CRH) neur...

journal_title：Circulation research

authors： Kang YM,Zhang ZH,Johnson RF,Yu Y,Beltz T,Johnson AK,Weiss RM,Felder RB

更新日期：2006-09-29 00:00:00