Abstract：
AIMS:Sulfur dioxide (SO₂) is an air pollutant that impedes neonatal development and induces adverse cardiorespiratory health effects, including tachycardia. Here, an animal model was developed that enabled characterization of (i) in vivo alterations in heart rate and (ii) altered activity in brainstem neurons that control heart rate after perinatal SO₂ exposure. METHODS AND RESULTS:Pregnant Sprague-Dawley dams and their pups were exposed to 5 parts per million SO₂ for 1 h daily throughout gestation and 6 days postnatal. Electrocardiograms were recorded from pups at 5 days postnatal to examine changes in basal and diving reflex-evoked changes in heart rate following perinatal SO₂ exposure. In vitro studies employed whole-cell patch-clamp electrophysiology to examine changes in neurotransmission to cardiac vagal neurons within the nucleus ambiguus upon SO₂ exposure using a preparation that maintains fictive inspiratory activity recorded from the hypoglossal rootlet. Perinatal SO₂ exposure increased heart rate and blunted the parasympathetic-mediated diving reflex-evoked changes in heart rate. Neither spontaneous nor inspiratory-related inhibitory GABAergic or glycinergic neurotransmission to cardiac vagal neurons was altered by SO₂ exposure. However, excitatory glutamatergic neurotransmission was decreased by 51.2% upon SO₂ exposure. This diminished excitatory neurotransmission was tetrodotoxin-sensitive, indicating SO₂ exposure impaired the activity of preceding glutamatergic neurons that synapse upon cardiac vagal neurons. CONCLUSIONS:Diminished glutamatergic, but unaltered inhibitory neurotransmission to cardiac vagal neurons provides a mechanism for the observed SO₂-induced elevated heart rate via an impairment of brainstem cardioinhibitory parasympathetic activity to the heart.
journal_name
Cardiovasc Resjournal_title
Cardiovascular researchauthors
Woerman AL,Mendelowitz Ddoi
10.1093/cvr/cvt057subject
Has Abstractpub_date
2013-07-01 00:00:00pages
16-23issue
1eissn
0008-6363issn
1755-3245pii
cvt057journal_volume
99pub_type
杂志文章abstract：OBJECTIVE:Hemodynamic stresses are considered to be important regulators of gene expression in vascular cells. In this study, we have investigated the role of shear stress on ACE expression in cultured rat vascular cells, and focused on the regulation of ACE expression in smooth muscle cells. METHODS:Rat aortic endoth...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(99)00269-2
更新日期：2000-01-14 00:00:00
abstract：:Hydrogen sulfide (H2S), as a gaseous signalling molecule, has been found to play important roles in postconditioning (PostC)-induced cardioprotection. Similar to nitric oxide (NO)-mediated protein S-nitrosylation (SNO), recent studies suggest that H2S could regulate protein function through another redox-based post-tr...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvw037
更新日期：2016-05-01 00:00:00
abstract：AIM:The aim of the study was to determine the potential for K(V)1 potassium channel blockers as inhibitors of human neoinitimal hyperplasia. METHODS AND RESULTS:Blood vessels were obtained from patients or mice and studied in culture. Reverse transcriptase-polymerase chain reaction and immunocytochemistry were used to...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvq305
更新日期：2011-02-01 00:00:00
abstract：OBJECTIVE:To study the effect of cardiac contraction on left coronary artery pressure-flow relations at different vascular volumes and to compare these relations in the beating heart with those in the heart arrested in systole and diastole. METHODS:Maximally vasodilated, Tyrode perfused, rabbit hearts (n = 6) with an ...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(98)00119-9
更新日期：1998-10-01 00:00:00
abstract：:The effects on an acute myocardial infarction of equipotent hypotensive doses of nitroglycerin and dipyridamole were studied using the thermographic technique in open-chest dogs. Nitroglycerin did not reduce the cool ischaemic area in any of the nine dogs studied. In six of the dogs, in which the ischaemic region coul...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/13.5.281
更新日期：1979-05-01 00:00:00
abstract：OBJECTIVE:Migration and proliferation of arterial smooth muscle cells are critical responses during restenosis after balloon angioplasty. We investigated the changes in the expression of Ca(2+) channels and dystrophin, two determinants of contraction, after balloon injury of rat aortas. METHODS:Proliferation and migra...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(00)00210-8
更新日期：2001-01-01 00:00:00
abstract：AIM:The interaction between TNF-like weak inducer of apoptosis (TWEAK, Tnfsf12) and the receptor, fibroblast growth factor-inducible 14 (Fn14), regulates vascular damage through different mechanisms, including inflammation. Oxidative stress plays a major role in inflammation and the development of atherosclerosis, but ...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvv204
更新日期：2015-10-01 00:00:00
abstract：OBJECTIVE:The aim was to investigate the effects of slowing the recovery of ischaemia induced intracellular acidosis with hypercapnic acidosis or dimethyl amiloride (DMA) on the extent of reperfusion induced cell death. METHODS:Isolated arterially perfused rabbit papillary muscles and septa were suspended in a control...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：
更新日期：1995-02-01 00:00:00
abstract：OBJECTIVE:Automatic analysis of the frequency content of the fibrillatory baseline on the surface ECG accurately reflects the average rate of atrial fibrillation (AF). This frequency measurement correlates with the behavior of AF and predicts the response to administration of ibutilide, a new antiarrhythmic drug. Neith...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(99)00156-x
更新日期：1999-10-01 00:00:00
abstract：:Although the level and pace of population aging display high geographical variability, virtually all countries have been experiencing growth in their elderly population, particularly in developed nations. Because aging is a major risk factor for atherosclerosis and associated disease, it is of up most importance to un...
journal_title：Cardiovascular research
pub_type： 杂志文章,评审
doi：10.1016/j.cardiores.2004.09.007
更新日期：2005-05-01 00:00:00
abstract：:Pulsatile haemodynamics associated with graded degrees of experimentally produced stenosis were studied in the canine femoral artery. Invasively determined pulsatile blood flow and noninvasively determined blood velocity with Doppler ultrasound were measured an average of 1.3 and 2.3 cm proximal to the stenosis, respe...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/13.1.45
更新日期：1979-01-01 00:00:00
abstract：OBJECTIVE:H(2)O(2) can contract many arteries, however the underlying mechanisms are not fully understood. This study aims to test whether H(2)O(2)-induced vasoconstriction could be functionally attributed to the activation of P(2)-purinoceptors in rat aorta and to explore its possible signaling mechanisms. METHODS:Is...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(00)00123-1
更新日期：2000-08-18 00:00:00
abstract：OBJECTIVE:The aim was to characterise the influence of a decrease in transsarcolemmal calcium influx on the calcium content of the sarcoplasmic reticulum and on the force of postrest contraction, which is largely activated by calcium released from the sarcoplasmic reticulum. METHODS:Isometric force of postrest contrac...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/27.5.801
更新日期：1993-05-01 00:00:00
abstract：:Mechanical stress signals transmitted through the heart walls during hemodynamic loading are sensed by the myocytes, which respond with changes in contractile performance and gene expression. External forces play an important role in physiological heart development and hypertrophy, but disruption of the well-balanced ...
journal_title：Cardiovascular research
pub_type： 杂志文章,评审
doi：10.1016/j.cardiores.2007.03.029
更新日期：2008-03-01 00:00:00
abstract：OBJECTIVE:Mechanoelectric Feedback, a mechanical intervention inducing an electrical change, is gaining credence as a cause of cardiac arrhythmia in the clinical situation. However, the precise mechanism is unknown. To elucidate this we investigated mechanical and chemical modulation of stretch-induced premature ventri...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(97)00314-3
更新日期：1998-04-01 00:00:00
abstract：OBJECTIVE:Matrix metalloproteinase-9 (MMP-9) activity is up regulated in the heart subjected to ischemic insult. Whether increased MMP-9 activity contributes to acute myocardial injury after ischemia-reperfusion remains unknown. To investigate the role of MMP-9 in myocardial infarction, we utilized a MMP-9 knockout mou...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(02)00254-7
更新日期：2002-06-01 00:00:00
abstract：:Peptidyl-prolyl cis-trans-isomerases are a highly conserved family of immunophilins. The three peptidyl-prolyl cis-trans-isomerase subfamilies are cyclophilins, FK-506-binding proteins, and parvulins. Peptidyl-prolyl cis-trans-isomerases are expressed in multiple human tissues and regulate different cellular functions...
journal_title：Cardiovascular research
pub_type： 杂志文章,评审
doi：10.1093/cvr/cvv096
更新日期：2015-06-01 00:00:00
abstract：:Muscle tissue in atrioventricular (A-V) cardiac valve leaflets was studied in 35 human hearts and was found to be more prominent in the anterior leaflet of the mitral (MAL) than in the other valve leaflets. From serial sectioning and wax model reconstruction, the anatomic arrangement of the muscle in the MAL indicates...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/12.11.675
更新日期：1978-11-01 00:00:00
abstract：OBJECTIVE:The multifunctional Ca2+-binding protein S100A4 (also known as Mts1 and Fsp1) is involved in fibrosis and tissue remodeling in several diseases including cancer, kidney fibrosis, central nervous system injury, and pulmonary vascular disease. We previously reported that S100A4 mRNA expression was increased in ...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/j.cardiores.2007.03.027
更新日期：2007-07-01 00:00:00
abstract：:The acute haemodynamic effects of taurine were studied in normal and in beta blocker (propranolol) or calcium antagonist (diltiazem) treated rabbits and in rabbits with experimentally produced chronic aortic regurgitation. The administration of taurine (25 mg.kg-1) did not affect heart rate and left ventricular end di...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/21.4.241
更新日期：1987-04-01 00:00:00
abstract：AIMS:Regional heterogeneities in contraction contribute to heart failure with reduced ejection fraction (HFrEF). We aimed to determine whether regional changes in myocardial relaxation similarly contribute to diastolic dysfunction in post-infarction HFrEF, and to elucidate the underlying mechanisms. METHODS AND RESULT...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvy257
更新日期：2019-03-15 00:00:00
abstract：AIMS:P2X receptors (P2XRs) mediate sympathetic control and autoregulation of renal circulation triggering preglomerular vasoconstriction, which protects glomeruli from elevated pressures. Although previous studies established a casual link between glomerular susceptibility to hypertensive injury and decreased preglomer...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvu249
更新日期：2015-02-01 00:00:00
abstract：STUDY OBJECTIVE:Afterload reduction is known to reduce regurgitant flow in patients with aortic regurgitation. Both arterial compliance and total peripheral resistance are determinants of afterload. The aim of this study was to evaluate the influence of arterial compliance and total peripheral resistance on the regurgi...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/25.10.869
更新日期：1991-10-01 00:00:00
abstract：OBJECTIVE:The regulation of pulmonary prostacyclin synthesis is not completely understood. We tested the hypothesis that prostacyclin production is predominantly stimulated by hemodynamic factors, such as increased shear-stress, and is thus increased in rats with chronic hypoxic pulmonary hypertension. METHODS:To this...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(02)00318-8
更新日期：2002-07-01 00:00:00
abstract：OBJECTIVE:The aim was to study (1) the effects of intracoronary saralasin, an angiotensin II receptor antagonist, on ischaemia induced and reperfusion induced regional cardiac noradrenaline release and ventricular arrhythmias; and (2) the implication of angiotensin II in coronary constriction during myocardial ischaemi...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/26.10.968
更新日期：1992-10-01 00:00:00
abstract：:Computation of indices of regional myocardial contractility such as the shortening, or the work done by or on a segment of myocardium in a single cardial cycle is tedious to perform manually, and complex interfacing and software is needed for digital computation. We describe the principles of an on-line, analogue devi...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/17.12.767
更新日期：1983-12-01 00:00:00
abstract：STUDY OBJECTIVE:The aim was to evaluate the thrombolytic efficacy of recombinant double chain tissue plasminogen activator (Duteplase, t-PA) given as a single intravenous bolus versus an infusion in a canine model of coronary arterial occlusion/reperfusion. DESIGN:Coronary arterial thrombi were induced by a copper coi...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/25.3.184
更新日期：1991-03-01 00:00:00
abstract：:Felodipine (4(2,3-dichlorophenyl)-1,4-dihydro-2, 6-dimethyl-3-ethoxycarbonyl-5-methoxycarbonyl pyridine)), a selective vasodilating anti-hypertensive drug, was used in the treatment of spontaneously hypertensive rats (SHRs) and age-matched Wistar-Kyoto rats (WKYs) from age 6 to 14 weeks, ie during the time of high blo...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/19.9.528
更新日期：1985-09-01 00:00:00
abstract：OBJECTIVE:To determine the effect of Na(+)-H+ exchange blockade on ischemic rigor contracture and reperfusion-induced hypercontracture. METHODS:Thirty-six pigs were submitted to 55 min of coronary occlusion and 5 h reperfusion. Myocardial segment length analysis with ultrasonic microcrystals was used to detect ischemi...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(97)00106-5
更新日期：1997-07-01 00:00:00
abstract：:Controversy exists as to whether the diabetic heart is more or less sensitive to ischemic injury. Although a considerable number of experimental studies have directly determined the effects of ischemia on the diabetic heart, there is still no general agreement as to whether metabolic changes within the myocardium cont...
journal_title：Cardiovascular research
pub_type： 杂志文章,评审
doi：10.1016/s0008-6363(97)00037-0
更新日期：1997-04-01 00:00:00
