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Anttila K, Streng T, Pispa J, Vainio M, Nikinmaa M. Hypoxia exposure and B-type natriuretic peptide release from Langendorff heart of rats. Acta Physiol (Oxf) 2017; 220:28-35. [PMID: 27496203 PMCID: PMC5412841 DOI: 10.1111/apha.12767] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 07/04/2016] [Accepted: 08/02/2016] [Indexed: 11/29/2022]
Abstract
Aim We studied whether available oxygen without induced mechanical stretch regulates the release of the biologically active B‐type natriuretic peptide (BNP) from Langendorff heart. Methods Rat hearts were isolated and perfused with a physiological Krebs–Henseleit solution at a constant hydrostatic pressure in Langendorff set‐up. The basal O2 level of perfusate (24.4 ± 0.04 mg L−1) was gradually lowered to 3.0 ± 0.01 mg L−1 over 20 min using N2 gas (n = 7). BNP and O2 level were measured from coronary flow. During control perfusions (n = 5), the O2 concentration was kept at 26.6 ± 0.3 mg L−1. Results A low oxygen concentration in the perfusate was associated with a significant increase in BNP release (F = 40.4, P < 0.001). Heart rate decreased when the oxygen concentration in the perfusate reached 9.1 ± 0.02 mg L−1 and continued to fall in lower oxygen concentrations (F = 14.8, P < 0.001). There was also a significant but inverse correlation between BNP and oxygen in the coronary flow (R2 = 0.27, P < 0.001). Conclusion In the spontaneously beating Langendorff rat heart, a decreasing concentration of oxygen in the ingoing perfusion increased the secretion of BNP. The effect of oxygen was independent of mechanical stretch of the heart as it occurred even when the heart rate decreased but the pressure conditions remained constant. The difference in the oxygen capacitance of blood and Krebs–Henseleit solution appears to be a major factor affecting secretion of BNP, which is correlated with the oxygen tension of myocardial cells and affected both by the oxygen concentration and capacitance of solution perfusing the heart and by the coronary flow.
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Affiliation(s)
- K. Anttila
- Laboratory of Animal Physiology; Department of Biology; University of Turku; Turku Finland
| | - T. Streng
- Laboratory of Animal Physiology; Department of Biology; University of Turku; Turku Finland
- Department of Pharmacology, Drug Development and Therapeutics; University of Turku; Turku Finland
- Turku Center for Disease Modeling (TCDM); University of Turku; Turku Finland
| | - J. Pispa
- Laboratory of Animal Physiology; Department of Biology; University of Turku; Turku Finland
| | - M. Vainio
- Laboratory of Animal Physiology; Department of Biology; University of Turku; Turku Finland
| | - M. Nikinmaa
- Laboratory of Animal Physiology; Department of Biology; University of Turku; Turku Finland
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Arjamaa O, Vuolteenaho O, Kivi E, Nikinmaa M. Hypoxia increases the release of salmon cardiac peptide (sCP) from the heart of rainbow trout (Oncorhynchus mykiss) under constant mechanical load in vitro. FISH PHYSIOLOGY AND BIOCHEMISTRY 2014; 40:67-73. [PMID: 23813187 DOI: 10.1007/s10695-013-9824-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Accepted: 06/11/2013] [Indexed: 06/02/2023]
Abstract
Our aim was to study the effects of hypoxia on the release of salmon cardiac peptide (sCP) from an isolated heart ventricle of trout during a constant mechanical load. Trout heart ventricles were studied in vitro. The ventricle was placed in an organ bath at 12 °C in which a constant mechanical load could be imposed on the ventricle while buffer solution was circulating. Ventricles were field-stimulated with a supramaximal voltage pulse at a rate of about 0.3 s⁻¹. Samples of 1 ml were collected at an interval of 10 min for 200 min from the organ bath and assessed with a radioimmunoassay for sCP. After a control period of 20 min, ventricles were exposed to hypoxia produced with N₂ gassing (n = 9) or to hypoxia with 20 mM BDM, a nonselective myosin ATPase inhibitor locking cross-bridges in a pre-power-stroke state inhibiting force production with normal electrical activity (n = 10). In this model and setup, hypoxia stimulated the release of sCP, but the interindividual variation in the response was large. At the end of hypoxia exposure, the concentration of sCP in the organ bath was about sixfold higher than at the start of the exposure (P < 0.05, one-way ANOVA for repeated measurements, followed by Dunnett's multiple comparison test). When BDM was introduced into the bath, the ventricle still secreted sCP but the hypoxic response was smaller than in the experiments without BDM. In the trout heart ventricle, there is a hypoxia-sensitive component in the release mechanism of sCP which is independent of contraction.
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Affiliation(s)
- Olli Arjamaa
- Department of Biology, Laboratory of Animal Physiology, University of Turku, 20014, Turku, Finland,
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Arjamaa O, Nikinmaa M. Natriuretic peptides in hormonal regulation of hypoxia responses. Am J Physiol Regul Integr Comp Physiol 2008; 296:R257-64. [PMID: 19005014 DOI: 10.1152/ajpregu.90696.2008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The possibility that natriuretic peptides' effects are important in hypoxia responses of vertebrates is reviewed. Both the transcription and release of natriuretic peptides are affected by oxygen tension. Furthermore, many of the effects observed in hypoxia, such as diuresis and a reduction of plasma volume, are also caused by treatment of the animal with natriuretic peptides. Also, several clinical observations about changes in natriuretic peptide levels in, e.g., sleep apnea and cyanotic congenital heart disease, are consistent with the idea that hypoxia is involved in the etiology of conditions, in which natriuretic peptide levels increase. Virtually all published information on the relationship between oxygen and natriuretic peptides is based on human studies. Because hypoxic conditions are more common in aquatic than terrestrial environments, future studies about the possible role of natriuretic peptides in hypoxia, as well as the role of hypoxia in the evolution of natriuretic peptides, including the different subtypes, should increasingly involve also aquatic organisms.
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Affiliation(s)
- Olli Arjamaa
- Centre of Excellence in Evolutionary Genetics and Physiology, Department of Biology, University of Turku, FI-20014 Turku, Finland
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Zhang WW, Hasaniya NW, Premaratne S, McNamara JJ. Atrial Natriuretic Peptide Protects Against Ischemia-Reperfusion Injury in Rabbit Hearts In Vivo. Vasc Endovascular Surg 2008; 42:263-7. [DOI: 10.1177/1538574408314438] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The aim of this study is to investigate whether atrial natriuretic peptide can mimic preconditioning to protect ischemia or reperfusion injury in rabbit hearts. New Zealand white rabbits were randomized into 3 groups: (1) Controls. Hearts received a 60 minute-occlusion of the left anterior descending artery, followed by a 180 minute-reperfusion. (2) Preconditioning. Two 5-minute periods of ischemia separated by a 10-minute reperfusion, followed by a 60-minute ischemia and a 180-minute reperfusion. (3) Atrial natriuretic peptide treatment. Bolus injection of exogenous atrial natriuretic peptide (2.5 µg/kg) given intravenously at 15 minutes prior to 60 minute-ischemia followed by a 180-minute reperfusion. Myocardial necrotic area and area at risk of necrosis were determined by triphenyltetrazolium chloride staining. Ratio of necrotic area to area at risk was 49.95% ± 1.15%, 7.95% ± 0.33%, and 8.36% ± 0.61% in the controls, preconditioning group, and atrial natriuretic peptide group, respectively. Both preconditioning and atrial natriuretic peptide significantly reduced the size of infarct caused by ischemia (preconditioning vs controls, P < .05; atrial natriuretic peptide vs controls, P < .05). Atrial natriuretic peptide can mimic ischemic preconditioning to protect rabbit hearts from prolonged ischemia and reperfusion injury. It may be involved in the cardioprotective mechanisms of preconditioning.
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Affiliation(s)
- Wayne W. Zhang
- Department of Surgery, School of Medicine, Loma Linda University, Loma Linda, California, , Department of Surgery, John A. Burns School of Medicine, University of Hawaii and Research Laboratory at the Queen's Medical Center, Honolulu, Hawaii
| | - Nahidh W. Hasaniya
- Department of Surgery, School of Medicine, Loma Linda University, Loma Linda, California, Department of Surgery, John A. Burns School of Medicine, University of Hawaii and Research Laboratory at the Queen's Medical Center, Honolulu, Hawaii
| | - Shyamal Premaratne
- Hunter Holmes McGuire Veterans Administration Medical Center and Virginia Union University, Richmond, Virginia, Department of Surgery, John A. Burns School of Medicine, University of Hawaii and Research Laboratory at the Queen's Medical Center, Honolulu, Hawaii
| | - J. Judson McNamara
- Department of Surgery, John A. Burns School of Medicine, University of Hawaii and Research Laboratory at the Queen's Medical Center, Honolulu, Hawaii
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Kido S, Hasebe N, Ishii Y, Kikuchi K. Tachycardia-induced myocardial ischemia and diastolic dysfunction potentiate secretion of ANP, not BNP, in hypertrophic cardiomyopathy. Am J Physiol Heart Circ Physiol 2005; 290:H1064-70. [PMID: 16172169 DOI: 10.1152/ajpheart.00110.2005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of this study was to investigate what factor determines tachycardia-induced secretion of atrial and brain natriuretic peptides (ANP and BNP, respectively) in patients with hypertrophic cardiomyopathy (HCM). HCM patients with normal left ventricular (LV) systolic function and intact coronary artery (n = 22) underwent rapid atrial pacing test. The cardiac secretion of ANP and BNP and the lactate extraction ratio (LER) were evaluated by using blood samples from the coronary sinus and aorta. LV end-diastolic pressure (LVEDP) and the time constant of LV relaxation of tau were measured by a catheter-tip transducer. These parameters were compared with normal controls (n = 8). HCM patients were divided into obstructive (HOCM) and nonobstructive (HNCM) groups. The cardiac secretion of ANP was significantly increased by rapid pacing in HOCM from 384 +/- 101 to 1,268 +/- 334 pg/ml (P < 0.05); however, it was not significant in control and HNCM groups. In contrast, the cardiac secretion of BNP was fairly constant and rather significantly decreased in HCM (P < 0.01). The cardiac ANP secretion was significantly correlated with changes in LER (r = -0.57, P < 0.01) and tau (r = 0.73, P < 0.001) in HCM patients. Tachycardia potentiates the cardiac secretion of ANP, not BNP, in patients with HCM, particularly when it induces myocardial ischemia and LV diastolic dysfunction.
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Affiliation(s)
- Shinsuke Kido
- First Department of Internal Medicine, Asahikawa Medical College, 2-1-1-1 Midorigaoka Higashi, Asahikawa, Hokkaido 078-8510, Japan
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Tavi P, Laine M, Voutilainen S, Lehenkari P, Vuolteenaho O, Ruskoaho H, Weckström M. Potentiation of stretch-induced atrial natriuretic peptide secretion by intracellular acidosis. THE AMERICAN JOURNAL OF PHYSIOLOGY 1999; 277:H405-12. [PMID: 10409221 DOI: 10.1152/ajpheart.1999.277.1.h405] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We sought to investigate whether atrial myocyte contraction and secretion of the atrial natriuretic peptide (ANP) are affected in the same manner by intervention in intracellular Ca(2+) handling by acidosis. The effects of propionate (20 mM)-induced intracellular acidosis on the stretch-induced changes in ANP secretion, contraction force, and intracellular Ca(2+) concentration ([Ca(2+)](i)) were studied in the isolated rat atrium. The stretch of the atrium was produced by increasing the intra-atrial pressure of the paced and superfused preparation. Contraction force was estimated from pressure pulses generated by the contraction of the atrium. Intracellular Ca(2+) was measured from indo 1-AM-loaded atria, and ANP was measured by radioimmunoassay from the perfusate samples collected during interventions. Intracellular pH of the atrial myocytes was measured by a fluorescent indicator (BCECF)-based imaging system. Intracellular acidification caused by 20 mM propionic acid (0.18 pH units) potentiated the stretch-induced (intra-atrial pressure from 1 to 4 mmHg) ANP secretion, causing a twofold secretion compared with nonacidotic controls. Simultaneously, the responsiveness of the atrial contraction to stretch was reduced (P < 0.05, n = 7). Stretch augmented the systolic indo 1-AM transients in acidic (P < 0.05, n = 6) and nonacidic atria (P < 0.05, n = 6). However, during acidosis this was accompanied by an increase of the diastolic indo 1-AM ratio (P < 0.05, n = 6). Cooccurrence of stretch and acidosis caused an increase in systolic and diastolic [Ca(2+)](i) and potentiated the stretch-induced ANP secretion, whereas the contraction force and its stretch sensitivity were decreased. This mechanism may be involved in ischemia-induced ANP secretion, suggesting a role for ANP secretion as an indicator of contractile dysfunction.
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Affiliation(s)
- P Tavi
- Departments of Physiology, Division of Biophysics and Biocenter Oulu, University of Oulu, FIN-90220 Oulu, Finland
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Ylitalo K, Uusimaa P, Vuolteenaho O, Ruskoaho H, Peuhkurinen K. Vasoactive peptide release in relation to hemodynamic and metabolic changes during rapid ventricular pacing. Pacing Clin Electrophysiol 1999; 22:1064-70. [PMID: 10456635 DOI: 10.1111/j.1540-8159.1999.tb00571.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Plasma atrial natriuretic peptide (ANP) concentration increases during ventricular arrhythmias and rapid ventricular pacing but less is known about plasma brain natriuretic peptide (BNP) and endothelin (ET-1). In the present study concentrations of ANP, the amino terminal part of the proANP (NT-proANP), BNP, and ET-1 were measured in the coronary sinus and femoral artery before and at the end of rapid ventricular pacing in 15 patients with coronary arterial disease. The changes were compared with the changes in mean arterial blood pressure, pulmonary capillary wedge pressure (PCWP), transcardiac differences in pH, pCO2, lactate, and norepinephrine. There was an increase in PCWP and a transient decrease in blood pressure after initiation of pacing. Pacing caused a decrease in ST-segment, transcardiac difference of norepinephrine, lactate extraction, pCO2 difference, and an increase in pH difference. Concentration of ANP in the coronary sinus and femoral artery and its transcardiac difference increased during pacing (P < 0.001), whereas changes in NT-proANP were small and BNP and ET-1 levels remained unchanged. The change in transcardiac ANP difference correlated with the change in lactate (r = 0.53, P < 0.05) but not that of norepinephrine, PCWP, or blood pressure. The results show that the plasma concentration of ANP increases more than that of NT-proANP during rapid ventricular pacing. Ischemia-induced release of ANP and its diminished elimination may contribute to the increased plasma ANP level.
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Affiliation(s)
- K Ylitalo
- Department of Internal Medicine, University of Oulu, Finland
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Uusimaa P, Ruskoaho H, Vuolteenaho O, Niemelä M, Lumme J, Ikäheimo M, Jounela A, Peuhkurinen K. Plasma vasoactive peptides after acute myocardial infarction in relation to left ventricular dysfunction. Int J Cardiol 1999; 69:5-14. [PMID: 10362366 DOI: 10.1016/s0167-5273(99)00007-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We measured plasma concentrations of vasoactive peptides in 32 patients with acute myocardial infarction and evaluated their value as markers of left ventricular dysfunction. Plasma levels of atrial natriuretic peptide (ANP), the N-terminal fragment of proANP (NT-proANP), B-type natriuretic peptide (BNP) and endothelin-1 were measured serially by radioimmunoassays. The infarct size was estimated from the creatine kinase MB release curve. Coronary angiography and left ventricular cineangiography were performed in all patients during hospitalization and 6 months later in 15 patients. Myocardial infarction caused an increase in vasoactive peptides, the highest values for ANP (36.5+/-6.79 pmol/l), NT-proANP (1130+/-170 pmol/l) and endothelin-1 (9.72+/-0.68 pmol/l) being found on admission and those for BNP (56.0+/-7.13 pmol/l) on Day 2. Plasma levels of natriuretic peptides were dependent on infarct size, its location and degree of myocardial dysfunction and that of BNP also on infarct artery patency. Plasma endothelin-1 level was higher in patients with TIMI 3 than TIMI 0-2 flow. Plasma vasoactive peptides remained elevated during the 6-month follow-up period and they were dependent on the degree of myocardial dysfunction. BNP measured on any day of hospitalization showed the best correlation with ejection fraction measured during the acute phase of infarction or at 6 months. The results show that BNP is the best indicator of left ventricular dysfunction after myocardial infarction and its reliability is not dependent on the time point of measurement.
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Affiliation(s)
- P Uusimaa
- Department of Internal Medicine, University of Oulu, Finland
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Abstract
Secreted by the heart, more specifically by atrial cardiomyocytes under normal conditions but also by ventricular myocytes during cardiac hypertrophy, natriuretic peptides are now considered important hormones in the control of blood pressure and salt and water excretion. Studies on natriuretic peptide secretagogues and their mechanisms of action have been complicated by hemodynamic changes and contractions to which the atria are constantly subjected. It now appears that atrial stretch through mechano-sensitive ion channels, adrenergic stimulation via alpha 1A-adrenergic receptors, and endothelin via its ETA receptor subtype are major triggering agents of natriuretic peptide release. With several other stimuli, such as angiotensin II and beta-adrenergic agents, modulation of natriuretic peptide release appears to be linked to local generation of prostaglandins. In all cases, intracellular calcium homeostasis, controlled by several ion channels, is considered a key element in the regulation of natriuretic peptide secretion.
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Affiliation(s)
- G Thibault
- Laboratory of Cell Biology of Hypertension, Clinical Research Institute of Montreal, Quebec, Canada.
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Honkonen EL, Kaukinen L, Pehkonen EJ, Kaukinen S. Atrial natriuretic peptide and N-terminal atrial natriuretic peptide in plasma reflect right ventricular volumes following coronary artery surgery. Acta Anaesthesiol Scand 1997; 41:685-93. [PMID: 9241326 DOI: 10.1111/j.1399-6576.1997.tb04767.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Atrial natriuretic peptide (ANP) and the more stable N-terminal fragment (N-ANP) of prohormone are peptides, released in equimolar amounts from cardiac myocytes in response to atrial stretch or ventricular overload and myocardial ischaemia. Protection of the right ventricular (RV) myocardium during ischaemia in cardiac surgery is difficult, especially in patients with severe right coronary artery (RCA) disease. This prospective study was designed to ascertain a possible relationship between changes in plasma ANP/N-ANP concentration and RV function in RCA-diseased patients. METHODS Plasma ANP and N-ANP concentrations and RV function, measured by fast-response thermodilution, were determined serially in 15 patients with total RCA stenosis and in another 15 with no significant RCA disease (controls) before, during and after coronary surgery. RESULTS The RV ejection fraction was lower and the RV end-systolic volume index higher in the RCA-diseased patients than in the controls (P < 0.05) on the second postoperative day, and both ANP and N-ANP were higher in the RCA patients (P < 0.05) from 6 h after cardiopulmonary bypass till the second postoperative day. At the same time the changes in N-ANP concentrations from the levels before induction of anaesthesia correlated with RV ejection fraction and RV volume indexes, but not with heart rate or parameters indirectly reflecting left-sided loading. Right atrial pressure did not differ between the groups nor did it increase significantly during the study. CONCLUSIONS The relationships found between N-ANP and RV volume indexes and RV ejection fraction suggest ventricular expression of ANP: ANP release may be stimulated by RV distension, the more so the poorer the RV function.
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Affiliation(s)
- E L Honkonen
- Department of Anaesthesia and Intensive Care, Tampere University Hospital, Finland
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Mair P, Mair J, Bleier J, Hörmann C, Balogh D, Puschendorf B. Augmented release of brain natriuretic peptide during reperfusion of the human heart after cardioplegic cardiac arrest. Clin Chim Acta 1997; 261:57-68. [PMID: 9187505 DOI: 10.1016/s0009-8981(97)06518-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The aim of the study was to investigate the release of natriuretic peptides during myocardial ischaemia and reperfusion associated with cardioplegic cardiac arrest. Brain natriuretic peptide (BNP) and atrial natriuretic peptide (ANP) concentrations were measured in paired arterial, central venous and coronary sinus blood samples in 19 patients undergoing elective coronary artery bypass grafting before aortic crossclamping and 1, 5, 10 and 20 min after aortic declamping. Peak myocardial BNP release after aortic declamping was significantly higher than baseline values before aortic crossclamping. Both peak and cumulative BNP release during reperfusion correlated significantly with the severity of ischaemia, as assessed by myocardial lactate production. In 3 patients with perioperative myocardial ischaemia, cumulative and peak myocardial BNP release after aortic unclamping was markedly higher than in the remaining 16 uneventful patients. Myocardial ANP release during reperfusion was not significantly different from baseline values before aortic crossclamping. In conclusion, our data demonstrate a significantly enhanced myocardial BNP release early during reperfusion of the human heart after global ischaemia associated with cardioplegic cardiac arrest.
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Affiliation(s)
- P Mair
- Department of Anaesthesia and Intensive Care Medicine, University of Innsbruck School of Medicine, Austria
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Uusimaa PA, Kiviluoma KT, Tóth M, Hassinen IE, Peuhkurinen KJ, Ruskoaho H. Adenosine inhibits the release of atrial natriuretic peptide from the perfused rat heart. Eur J Pharmacol 1993; 242:199-203. [PMID: 8253116 DOI: 10.1016/0014-2999(93)90081-r] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The effect of adenosine on atrial natriuretic peptide (ANP) release was studied in the perfused rat heart model. Adenosine had no effect on the heart rate of the spontaneously beating heart at a concentration of 1 microM, whereas at concentrations of 10 and 100 microM it dose-dependently decreased the frequency by 17 and 55% (P < 0.05 and P < 0.001, respectively). In the spontaneously beating hearts, immunoreactive ANP release was inhibited by adenosine at concentrations of 10 and 100 microM (P < 0.05 and P < 0.01). When heart rate was maintained constant by external pacing, inhibition of ANP release was observed only with 100 microM adenosine (P < 0.01). The results show that adenosine dose-dependently inhibits ANP release from the perfused rat heart. The effect of adenosine on ANP release was partially due to its negative chronotropic effect but the results suggest that adenosine may also have a direct inhibitory effect on ANP release in atrial myocardium.
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Affiliation(s)
- P A Uusimaa
- Department of Medical Biochemistry, University of Oulu, Finland
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Pesonen E, Heldt GP, Merritt TA, Sahn DJ, Elias W, Tikkanen I, Fyhrquist F, Andersson S. Atrial natriuretic factor and pulmonary status in premature infants with respiratory distress syndrome: preliminary investigation. Pediatr Pulmonol 1993; 15:362-4. [PMID: 8337015 DOI: 10.1002/ppul.1950150609] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
We studied the correlation of atrial natriuretic factor (ANF) with lung compliance in a series of 16 premature infants with respiratory distress syndrome (RDS). The infants were followed during the first week of life by sequential Doppler echocardiography, lung compliance, and ANF measurements. Plasma ANF concentration varied between 38 and 2220 pg/mL; mean concentrations of 393 and 123 pg/mL with the ductus open and with it closed, respectively (P < 0.01). The arteriolar/alveolar oxygen-tension ratio showed an inverse correlation with the logarithm (In) of the ANF concentration (r = -0.55, P = 0.0002). Both mean airway pressure and In ANF showed an inverse correlation with the arteriolar/alveolar oxygen tension ratio (R = -0.77, F = 20.5 and 13.8, respectively). Plasma ANF was inversely correlated to lung compliance (r = -0.64, P < 0.0001). In infants with RDS, plasma ANF concentrations increase with the severity of respiratory distress. Because ANF increases endothelial permeability, in this preliminary investigation lead to the hypothesis that it may contribute to respiratory distress by causing extravasation of fluid from the pulmonary circulation in these patients.
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MESH Headings
- Atrial Natriuretic Factor/blood
- Ductus Arteriosus, Patent/physiopathology
- Follow-Up Studies
- Humans
- Infant, Newborn
- Infant, Premature, Diseases/blood
- Infant, Premature, Diseases/drug therapy
- Infant, Premature, Diseases/physiopathology
- Lung Compliance
- Oxygen/physiology
- Pulmonary Surfactants/therapeutic use
- Pulmonary Ventilation
- Respiratory Distress Syndrome, Newborn/blood
- Respiratory Distress Syndrome, Newborn/drug therapy
- Respiratory Distress Syndrome, Newborn/physiopathology
- Severity of Illness Index
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Affiliation(s)
- E Pesonen
- Department of Pediatrics, University of California Medical Center, San Diego
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Lochner A, Genade S, Mouton R. Massive atrial natriuretic peptide (ANP) release in ischemia reperfusion. Cardiovasc Drugs Ther 1992; 6:447-9. [PMID: 1387800 DOI: 10.1007/bf00054196] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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