Vagus nerve stimulation inhibits the increase in Ca2+ transient and left ventricular force caused by sympathetic nerve stimulation but has no direct effects alone--epicardial Ca2+ fluorescence studies using fura-2 AM in the isolated innervated beating rab

Abstract:

:The effects of direct autonomic nerve stimulation on the heart may be quite different to those of perfusion with pharmacological neuromodulating agents. This study was designed to investigate the effect of autonomic nerve stimulation on intracellular calcium fluorescence using fura-2 AM in the isolated Langendorff-perfused rabbit heart preparation with intact dual autonomic innervation. The effects of autonomic nerve stimulation on cardiac force and calcium transients were more obvious during intrinsic sinus rhythm. High-frequency (15 Hz, n = 5) right vagus nerve stimulation (VS) decreased heart rate from 142.7 +/- 2.6 to 75.5 +/- 10.2 beats min(-1) and left ventricular pressure from 36.4 +/- 3.2 to 25.9 +/- 1.9 mmHg, whilst simultaneously decreasing the diastolic and systolic level of the calcium transient. Direct sympathetic nerve stimulation (7 Hz, n = 8) increased heart rate (from 144.7 +/- 10.5 to 213.2 +/- 4.9 beats min(-1)) and left ventricular pressure (from 37.5 +/- 3.6 to 43.7 +/- 2.8 mmHg), whilst simultaneously increasing the diastolic and systolic level of the calcium transient. During constant ventricular pacing, the high-frequency right vagus nerve stimulation did not have any direct effect on ventricular force or the calcium transient (n = 8), but was effective in reducing the effect of direct sympathetic nerve stimulation.

journal_name

Exp Physiol

journal_title

Experimental physiology

authors

Brack KE,Coote JH,Ng GA

doi

10.1113/expphysiol.2009.048215

subject

Has Abstract

pub_date

2010-01-01 00:00:00

pages

80-92

issue

1

eissn

0958-0670

issn

1469-445X

pii

expphysiol.2009.048215

journal_volume

95

pub_type

杂志文章
  • Effect of adrenaline and alpha-agonists on net rate of liquid absorption from the pleural space of rabbits.

    abstract::Indirect evidence supporting a solute-coupled liquid absorption from the pleural space of rabbits has recently been provided; moreover, the beta 2-adrenoceptor agonist terbutaline has been found to increase this absorption. In this study the effect of adrenaline and alpha-adrenoceptor agonists on net rate of liquid ab...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/expphysiol.1997.sp004043

    authors: Zocchi L,Raffaini A,Agostoni E

    更新日期:1997-05-01 00:00:00

  • Volumetric change of the lateral ventricles in the human brain following glucose loading.

    abstract::Lateral ventricular volumes were monitored and quantified using accurately registered magnetic resonance images (MRIs) in six healthy individuals 30 min before and up to 4 h after ingestion of a glucose drink. The volume of the lateral ventricles increased by an average (+/- S.E.M.) of 2.4 +/- 0.4% as blood glucose le...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1111/j.1469-445x.1999.tb00085.x

    authors: Puri BK,Lewis HJ,Saeed N,Davey NJ

    更新日期:1999-01-01 00:00:00

  • Postprandial adjustments in renal phosphate excretion do not involve a gut-derived phosphaturic factor.

    abstract:NEW FINDINGS:What is the central question of this study? Does a previously hypothesized signalling mechanism, believed to detect postprandial increases in intestinal phosphate and that can stimulate the kidneys to rapidly excrete phosphate, operate under physiological conditions? What is the main finding and its import...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/EP086062

    authors: Lee GJ,Mossa-Al Hashimi L,Debnam ES,Unwin RJ,Marks J

    更新日期:2017-04-01 00:00:00

  • microRNA-143-3p regulates odontogenic differentiation of human dental pulp stem cells through regulation of the osteoprotegerin-RANK ligand pathway by targeting RANK.

    abstract:NEW FINDINGS:What is the central question of this study? What is the role of miR-143-3p during human dental pulp stem cell (hDPSC) differentiation. What is the main finding and its importance? miR-143-3p negatively regulates receptor activator of nuclear factor-κB (RANK). RANK ligand (RANKL) binds to RANK and stimulate...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/EP087992

    authors: Yang C,Jia R,Zuo Q,Zheng Y,Wu Q,Luo B,Lin P,Yin L

    更新日期:2020-05-01 00:00:00

  • Effects of chronic heart failure in rats on the recovery of microvascular PO2 after contractions in muscles of opposing fibre type.

    abstract::Chronic heart failure (CHF) impairs muscle O2 delivery (QO2) and, at a given O2 uptake (VO2), lowers microvascular O2 pressures (PmvO2: determined by the QO2-to-VO2 ratio), which may impair recovery of high-energy phosphates following exercise. Because CHF preferentially decreases QO2 to slow-twitch muscles, we hypoth...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/expphysiol.2004.027367

    authors: McDonough P,Behnke BJ,Musch TI,Poole DC

    更新日期:2004-07-01 00:00:00

  • Alphaviral cytotoxicity and its implication in vector development.

    abstract::A great variety of viruses have been engineered to serve as expression vectors. Among them, the alphaviruses Semliki Forest virus and Sindbis virus represent promising tools for heterologous gene expression in a wide variety of host cells. Several applications have already been described in neurobiological studies, in...

    journal_title:Experimental physiology

    pub_type: 杂志文章,评审

    doi:10.1113/expphysiol.2004.028142

    authors: Rhême C,Ehrengruber MU,Grandgirard D

    更新日期:2005-01-01 00:00:00

  • Evolution of contractile and elastic properties of rat soleus muscle fibres under unloading conditions.

    abstract::Rats were submitted to 14 days of hindlimb suspension in order to examine the contractile and elastic properties of the soleus muscles under disuse conditions. The calcium/strontium activation properties, the maximal shortening velocity (V0), as well as the time behaviour of force transients following quick releases a...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1111/j.1469-445x.1999.tb00075.x

    authors: Toursel T,Stevens L,Mounier Y

    更新日期:1999-01-01 00:00:00

  • Combined treatment of dipeptidyl peptidase-4 inhibitor and exercise training improves lipid profile in KK/Ta mice.

    abstract:NEW FINDINGS:What is the central question of this study? Exercise for type 2 diabetes patients treated with insulin therapy involves the risk of hypoglycaemia. Dipeptidyl peptidase-4 (DPP-4) inhibitors can be effective in combination with exercise because they reduce the incidence of hypoglycaemia. We evaluated the eff...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/EP087449

    authors: Tanimura Y,Aoi W,Mizushima K,Higashimura Y,Naito Y

    更新日期:2019-07-01 00:00:00

  • Testing the plasticity of insulin secretion and β-cell function in vivo: responses to chronic hyperglycaemia in the sheep.

    abstract::Plasticity of insulin secretion is essential to maintain the action of insulin during insulin resistance and to prevent diabetes. Investigation of the plasticity of insulin secretion and its regulation is challenging, and the objective of this study was to develop a novel large-animal-based model. The effect of chroni...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/expphysiol.2011.063560

    authors: Gatford KL,De Blasio MJ,How TA,Harland ML,Summers-Pearce BL,Owens JA

    更新日期:2012-05-01 00:00:00

  • Body position and cardiac dynamic and chronotropic responses to steady-state isocapnic hypoxaemia in humans.

    abstract::Neural mediation of the human cardiac response to isocapnic (IC) steady-state hypoxaemia was investigated using coarse-graining spectral analysis of heart rate variability (HRV). Six young adults were exposed in random order to a hypoxia or control protocol, in supine and sitting postures, while end-tidal PCO2 (PET,CO...

    journal_title:Experimental physiology

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:

    authors: Lucy SD,Hughson RL,Kowalchuk JM,Paterson DH,Cunningham DA

    更新日期:2000-03-01 00:00:00

  • Effect of feeding on the diurnal rhythm of plasma cortisol and adrenocorticotrophic hormone concentrations in the pregnant ewe and sheep fetus.

    abstract::The effects of two different feeding regimes on the 24 h profiles of maternal and fetal plasma cortisol and adrenocorticotrophic hormone (ACTH) concentrations were studied in eight pregnant ewes between 123 and 144 days of gestation. Once daily-fed ewes (n = 4) received 1 kg of lucerne-chaff at 11.00 h, and multi-fed ...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/expphysiol.1991.sp003488

    authors: Simonetta G,Walker DW,McMillen IC

    更新日期:1991-03-01 00:00:00

  • Vascular responses to hypoxia are not impaired in obstructive sleep apnoea patients free of overt cardiovascular disease.

    abstract:NEW FINDINGS:What is the central question of this study? Does treatment of obstructive sleep apnoea (OSA) with nocturnal oxygen or continuous positive airway pressure (CPAP) improve hypoxic vascular responses, which are reportedly impaired in OSA? What is the main finding and its importance? Cerebrovascular and cardiov...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/EP086845

    authors: Beaudin AE,Hanly PJ,Raneri JK,Sajobi TT,Anderson TJ,Poulin MJ

    更新日期:2019-04-01 00:00:00

  • The role of steroid hormones in the regulation of vasopressin and oxytocin release and mRNA expression in hypothalamo-neurohypophysial explants from the rat.

    abstract::Vasopressin and oxytocin release from the neural lobe, and the vasopressin and oxytocin mRNA contents of the supraoptic and paraventricular nuclei are increased by hypertonicity of the extracellular fluid. The factors regulating these parameters can be conveniently studied in perifused explants of the hypothalamo-neur...

    journal_title:Experimental physiology

    pub_type: 杂志文章,评审

    doi:10.1111/j.1469-445x.2000.tb00021.x

    authors: Sladek CD,Swenson KL,Kapoor R,Sidorowicz HE

    更新日期:2000-03-01 00:00:00

  • Effects of testosterone on cardiomyocyte calcium homeostasis and contractile function in female rats.

    abstract::The role of testosterone (T) in the regulation of cardiovascular function in females is not well understood. Our goal was to examine the effect of T on cardiomyocyte biology by measuring sarcomere shortening/relaxation and intracellular calcium cycling in adult female Sprague-Dawley rats. The rats were divided into th...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/expphysiol.2012.067009

    authors: Beesley RD,Palmer BM,Casson PR,Toth MJ

    更新日期:2013-01-01 00:00:00

  • Carotid body chemoreflex: a driver of autonomic abnormalities in sleep apnoea.

    abstract::What is the topic of this review? This article presents emerging evidence for heightened carotid body chemoreflex activity as a major driver of sympathetic activation and hypertension in sleep apnoea patients. What advances does it heighlight? This article discusses the recent advances on cellular, molecular and epige...

    journal_title:Experimental physiology

    pub_type: 杂志文章,评审

    doi:10.1113/EP085624

    authors: Prabhakar NR

    更新日期:2016-08-01 00:00:00

  • Serotonin in the solitary tract nucleus shortens the laryngeal chemoreflex in anaesthetized neonatal rats.

    abstract::What is the central question of this study? Failure to terminate apnoea and arouse is likely to contribute to sudden infant death syndrome (SIDS). Serotonin is deficient in the brainstems of babies who died of SIDS. Therefore, we tested the hypothesis that serotonin in the nucleus of the solitary tract (NTS) would sho...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/EP085716

    authors: Donnelly WT,Bartlett D Jr,Leiter JC

    更新日期:2016-07-01 00:00:00

  • Introducing a rat model of prenatal androgen-induced polycystic ovary syndrome in adulthood.

    abstract::Polycystic ovary syndrome (PCOS) is one of the most common endocrine disorders in women, with a prevalence of 8-12% during the reproductive years. In the present study, using prenatal exposure to a single dose of testosterone during the critical period of fetal development, we aimed to introduce an enhanced rat model ...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/expphysiol.2014.078055

    authors: Tehrani FR,Noroozzadeh M,Zahediasl S,Piryaei A,Azizi F

    更新日期:2014-05-01 00:00:00

  • Absorption and intestinal catabolism of fatty acids in the rat: effect of chain length and unsaturation.

    abstract::Simultaneous portal blood absorption and intestinal mucosal catabolism of labelled fatty acids were investigated. Anaesthetized adult Wistar rats were infused intraduodenally either with 90 mumol of capric (C10:0), oleic (C18:1), linoleic (C18:2) or arachidonic (C20:4) 1-14C acids or with 30 mumol of each labelled fat...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/expphysiol.1991.sp003511

    authors: Bernard A,Carlier H

    更新日期:1991-05-01 00:00:00

  • Is there something fishy about the regulation of the ryanodine receptor in the fish heart?

    abstract:NEW FINDINGS:What is the topic of this review? Excitation-contraction coupling in fish hearts is maintained over a range of temperatures that would be cardioplegic to most mammals. Here, we review what is known about the fish cardiac ryanodine receptor, and consider how it may be regulated in a different manner from th...

    journal_title:Experimental physiology

    pub_type: 杂志文章,评审

    doi:10.1113/EP085136

    authors: Shiels HA,Sitsapesan R

    更新日期:2015-12-01 00:00:00

  • Lysophosphatidic acid induces shear stress-dependent Ca2+ influx in mouse aortic endothelial cells in situ.

    abstract::Using real-time two-photon laser scanning microscopy, we have demonstrated that lysophosphatidic acid (LPA), a bioactive lipid mediator, causes shear stress-dependent oscillatory local increase in intracellular Ca(2+) concentration ([Ca(2+)](i)) in fluo-4-loaded endothelial cells of isolated mouse aortic strips in sit...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/expphysiol.2011.056416

    authors: Ohata H,Yamada H,Momose K

    更新日期:2011-04-01 00:00:00

  • Tactile priming accelerates conscious access to continuous flash-suppressed characters.

    abstract:NEW FINDINGS:What is the central question of this study? Research has reported that some sensory input, such as auditory and olfactory input, can affect subliminal visual processing. However, it is important to address whether tactile input, another form of elementary sensory input, could influence the interocular riva...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/EP087944

    authors: Lang Y,Gao M,Huang Q,Liu Z,Wu L,Tang R

    更新日期:2019-11-01 00:00:00

  • In vivo human cardiac shortening and lengthening velocity is region dependent and not coupled with heart rate: 'longitudinal' strain rate markedly underestimates apical contribution.

    abstract:NEW FINDINGS:What is the central question of this study? Regulation of cardiac function is typically achieved by changes in heart rate (HR) and cardiac shortening velocity (strain rate; SR), but their interdependence in vivo remains poorly understood. What is the main finding and its importance? Using resistance exerci...

    journal_title:Experimental physiology

    pub_type: 杂志文章,评审

    doi:10.1113/EP085081

    authors: Stöhr EJ,Stembridge M,Esformes JI

    更新日期:2015-04-20 00:00:00

  • Oxygen sensing by mitochondria at complex III: the paradox of increased reactive oxygen species during hypoxia.

    abstract::All eukaryotic cells utilize oxidative phosphorylation to maintain their high-energy phosphate stores. Mitochondrial oxygen consumption is required for ATP generation, and cell survival is threatened when cells are deprived of O(2). Consequently, all cells have the ability to sense O(2), and to activate adaptive proce...

    journal_title:Experimental physiology

    pub_type: 杂志文章,评审

    doi:10.1113/expphysiol.2006.033506

    authors: Guzy RD,Schumacker PT

    更新日期:2006-09-01 00:00:00

  • The crosstalk between the kidney and the central nervous system: the role of renal nerves in blood pressure regulation.

    abstract:NEW FINDINGS:What is the topic of this review? This review describes the role of renal nerves as the key carrier of signals from the kidneys to the CNS and vice versa; the brain and kidneys communicate through this carrier to maintain homeostasis in the body. What advances does it highlight? Whether renal or autonomic ...

    journal_title:Experimental physiology

    pub_type: 杂志文章,评审

    doi:10.1113/expphysiol.2014.079889

    authors: Nishi EE,Bergamaschi CT,Campos RR

    更新日期:2015-04-20 00:00:00

  • Crosstalk between the renal sympathetic nerve and intrarenal angiotensin II modulates proximal tubular sodium reabsorption.

    abstract:NEW FINDINGS:What is the topic of this review? The sympathetic control of renal sodium tubular reabsorption is dependent on activation of the intrarenal renin-angiotensin system and activation of the angiotensin II type 1 (AT1 ) receptor by angiotensin II. What advances does it highlight? Despite the fact that the inte...

    journal_title:Experimental physiology

    pub_type: 杂志文章,评审

    doi:10.1113/EP085075

    authors: Pontes RB,Girardi AC,Nishi EE,Campos RR,Bergamaschi CT

    更新日期:2015-04-20 00:00:00

  • Interactions between nitric oxide and superoxide on the neural regulation of proximal fluid reabsorption in hypertensive rats.

    abstract::This study investigated the role of nitric oxide (NO) and superoxide anions in modulating the renal nerve-dependent increases in proximal tubular fluid reabsorption (Jva). Renal nerve stimulation at 0.75 and 1.0 Hz (15 V, 0.2 ms) in anaesthetized Wistar rats had no effect on glomerular filtration rate but decreased ur...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/expphysiol.2003.002640

    authors: Wu XC,Johns EJ

    更新日期:2004-05-01 00:00:00

  • Differential aerobic exercise-induced changes in plasma aldosterone between African Americans and Caucasians.

    abstract::Aldosterone influences the kidney's regulation of blood pressure (BP), but aldosterone can contribute to the pathogenesis of hypertension. Blood pressure is reduced with aerobic exercise training (AEX), but the extent to which plasma aldosterone (PA) levels change is unclear. The purpose of this study was to determine...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/expphysiol.2007.037408

    authors: Jones JM,Dowling TC,Park JJ,Phares DA,Park JY,Obisesan TO,Brown MD

    更新日期:2007-09-01 00:00:00

  • Changes in prefrontal cerebral oxygenation and microvascular blood volume in hypoxia and possible association with acute mountain sickness.

    abstract:NEW FINDINGS:What is the central question of this study? The role of the cerebral haemodynamic response to either normobaric or hypobaric hypoxia in people susceptible to acute mountain sickness (AMS) is still under debate. Prefrontal cortex near-infrared spectroscopy-derived parameters were monitored in normobaric hyp...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/EP088515

    authors: Manferdelli G,Marzorati M,Easton C,Porcelli S

    更新日期:2021-01-01 00:00:00

  • The glucogenic capacity of the fetal pig: developmental regulation by cortisol.

    abstract::In the present study, the ontogenic changes in gluconeogenic enzyme activities and in hepatic glycogen and beta-adrenergic receptor levels were investigated in fetal pigs from 70 days of gestation until delivery at term (114 +/- 2 days). The values were compared with those observed in fetuses infused subcutaneously wi...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/expphysiol.1995.sp003860

    authors: Fowden AL,Apatu RS,Silver M

    更新日期:1995-05-01 00:00:00

  • Adenosine and hypoxanthine transport in horse erythrocytes: evidence for a polymorphism in the transport of hypoxanthine via a sodium-dependent cotransporter.

    abstract::The inward transport of two purines, adenosine and hypoxanthine, at 37 degrees C by horse erythrocytes was compared. No mediated transport of adenosine was detected in horse erythrocytes, nor was saturable, high-affinity binding of the potent facilitated-diffusion inhibitor nitrobenzylthioinosine demonstrable in horse...

    journal_title:Experimental physiology

    pub_type: 杂志文章

    doi:10.1113/expphysiol.1998.sp004104

    authors: Jarvis SM,Harris RC

    更新日期:1998-03-01 00:00:00