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Koelen J, Vonk A, Klein A, de Koning L, Vonk P, de Vet S, Wiers R. Man vs. machine: A meta-analysis on the added value of human support in text-based internet treatments (“e-therapy”) for mental disorders. Clin Psychol Rev 2022; 96:102179. [DOI: 10.1016/j.cpr.2022.102179] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 04/28/2022] [Accepted: 06/04/2022] [Indexed: 11/03/2022]
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Ramalho A, Silva I, Suen S, Bierlaagh M, Vonk A, Pott J, Boj S, Crawford D, Goddeeris M, Vermeulen F, Amaral M, de Boeck K, Beekman J, van der Ent C. 660: Screening of ELX-02 readthrough effect by forskolin-induced swelling assay in CFTR nonsense mutation–bearing organoids as predictive test for clinical trial patient stratification. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)02083-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Muilwijk D, de Poel E, van Mourik P, Suen S, Vonk A, Brunsveld J, Kruisselbrink E, Oppelaar H, Hagemeijer M, Berkers G, de Winter-de Groot K, Michel S, Jans S, van Panhuis H, van der Eerden M, van der Meer R, Roukema J, Dompeling E, Weersink E, Koppelman G, Vries R, Zomer-van Ommen D, Eijkemans R, van der Ent C, Beekman J. 665: Forskolin-induced intestinal organoid swelling predicts long-term cystic fibrosis disease progression. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)02088-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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van Mourik P, Bierlaagh M, Vonk A, Ramalho AS, Silva I, Beekman J, van der Ent C, Gilmartin G. WS11.2 Initial evaluation of the ex vivo response to the CFTR potentiator dirocaftor, corrector posenacaftor and amplifier nesolicaftor in organoids derived from cystic fibrosis subjects with ultra-rare mutations. J Cyst Fibros 2020. [DOI: 10.1016/s1569-1993(20)30223-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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van den Brink FS, Meijers TA, Hofma SH, van Boven AJ, Nap A, Vonk A, Symersky P, Sjauw KD, Knaapen P. Prophylactic veno-arterial extracorporeal membrane oxygenation in patients undergoing high-risk percutaneous coronary intervention. Neth Heart J 2020; 28:139-144. [PMID: 31782108 PMCID: PMC7052097 DOI: 10.1007/s12471-019-01350-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
PURPOSE Complex high-risk percutaneous coronary intervention (PCI) is challenging and frequently accompanied by haemodynamic instability. Veno-arterial extracorporeal membrane oxygenation (VA-ECMO) can provide cardiopulmonary support in high-risk PCI. However, the outcome is unclear. METHODS A two-centre, retrospective study was performed of all patients undergoing high-risk PCI and receiving VA-ECMO for cardiopulmonary support. RESULTS A total of 14 patients (92% male, median age 69 (53-83) years), of whom 50% had previous coronary artery disease in the form of a coronary artery bypass graft (36%) and a PCI (14%) underwent high-risk PCI and received VA-ECMO support. The main target lesion was a left main coronary artery in 78%, a left anterior descending artery in 14%, a right coronary artery in 7%, and 71% underwent multi-vessel PCI in addition to main target vessel PCI. The median SYNTAX score was 27.2 (8-42.5) and in 64% (9/14) there was a chronic total occlusion. Left ventricular function was mildly impaired in 7% (1/14), moderately impaired in 14% (2/14) and severely impaired in 64% (9/14). Cannulation was femoral-femoral in all patients. Median ECMO run was 2.57 h (1-4). Survival was 93% (13/14). One patient died during hospitalisation due to refractory cardiac failure. All other patients survived to discharge. Complications occurred in 14% (2/14), with one patient developing a transient ischaemic attack post-ECMO and one patient developing a thrombus in the femoral vein used for ECMO cannulation. CONCLUSION VA-ECMO in high-risk PCI is feasible with a good outcome. It can be successfully used for cardiopulmonary support in selected patients.
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Affiliation(s)
- F S van den Brink
- Department of Cardiology, Medisch Centrum Leeuwarden, Leeuwarden, The Netherlands.
| | - T A Meijers
- Department of Cardiology, Location Vrije Universiteit Medisch Centrum, Amsterdam Universitair Medisch Centrum, Amsterdam, The Netherlands
| | - S H Hofma
- Department of Cardiology, Medisch Centrum Leeuwarden, Leeuwarden, The Netherlands
| | - A J van Boven
- Department of Cardiology, Medisch Centrum Leeuwarden, Leeuwarden, The Netherlands
| | - A Nap
- Department of Cardiology, Location Vrije Universiteit Medisch Centrum, Amsterdam Universitair Medisch Centrum, Amsterdam, The Netherlands
| | - A Vonk
- Department of Cardiology, Location Vrije Universiteit Medisch Centrum, Amsterdam Universitair Medisch Centrum, Amsterdam, The Netherlands
| | - P Symersky
- Department of Cardio-Thoracic Surgery, Location Vrije Universiteit Medisch Centrum, Amsterdam Universitair Medisch Centrum, Amsterdam, The Netherlands
| | - K D Sjauw
- Department of Cardiology, Medisch Centrum Leeuwarden, Leeuwarden, The Netherlands
| | - P Knaapen
- Department of Cardiology, Location Vrije Universiteit Medisch Centrum, Amsterdam Universitair Medisch Centrum, Amsterdam, The Netherlands
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Mullenders J, Statia M, Van Mourik P, Vonk A, Aguilera B, Van der Meer R, Heijerman H, Janssens H, Clevers H, Beekman J, Van der Ent K, Vries R, Boj S. WS04-5 The TOPAZ study, a large-scale study in organoids derived from F508del homozygous cystic fibrosis patients treated with Orkambi. J Cyst Fibros 2019. [DOI: 10.1016/s1569-1993(19)30140-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Touw HR, Parlevliet KL, Beerepoot M, Schober P, Vonk A, Twisk JW, Elbers PW, Boer C, Tuinman PR. Lung ultrasound compared with chest X-ray in diagnosing postoperative pulmonary complications following cardiothoracic surgery: a prospective observational study. Anaesthesia 2018. [PMID: 29529332 PMCID: PMC6099367 DOI: 10.1111/anae.14243] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Postoperative pulmonary complications are common after cardiothoracic surgery and are associated with adverse outcomes. The ability to detect postoperative pulmonary complications using chest X-rays is limited, and this technique requires radiation exposure. Little is known about the diagnostic accuracy of lung ultrasound for the detection of postoperative pulmonary complications after cardiothoracic surgery, and we therefore aimed to compare lung ultrasound with chest X-ray to detect postoperative pulmonary complications in this group of patients. We performed this prospective, observational, single-centre study in a tertiary intensive care unit treating adult patients who had undergone cardiothoracic surgery. We recorded chest X-ray findings upon admission and on postoperative days 2 and 3, as well as rates of postoperative pulmonary complications and clinically-relevant postoperative pulmonary complications that required therapy according to the treating physician as part of their standard clinical practice. Lung ultrasound was performed by an independent researcher at the time of chest X-ray. We compared lung ultrasound with chest X-ray for the detection of postoperative pulmonary complications and clinically-relevant postoperative pulmonary complications. We also assessed inter-observer agreement for lung ultrasound, and the time to perform both imaging techniques. Subgroup analyses were performed to compare the time to detection of clinically-relevant postoperative pulmonary complications by both modalities. We recruited a total of 177 patients in whom both lung ultrasound and chest X-ray imaging were performed. Lung ultrasound identified 159 (90%) postoperative pulmonary complications on the day of admission compared with 107 (61%) identified with chest X-ray (p < 0.001). Lung ultrasound identified 11 out of 17 patients (65%) and chest X-ray 7 out of 17 patients (41%) with clinically-relevant postoperative pulmonary complications (p < 0.001). The clinically-relevant postoperative pulmonary complications were detected earlier using lung ultrasound compared with chest X-ray (p = 0.024). Overall inter-observer agreement for lung ultrasound was excellent (κ = 0.907, p < 0.001). Following cardiothoracic surgery, lung ultrasound detected more postoperative pulmonary complications and clinically-relevant postoperative pulmonary complications than chest X-ray, and at an earlier time-point. Our results suggest lung ultrasound may be used as the primary imaging technique to search for postoperative pulmonary complications after cardiothoracic surgery, and will enhance bedside decision making.
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Affiliation(s)
- H R Touw
- Department of Intensive Care Medicine, Amsterdam Cardiovascular Sciences, Amsterdam Infection and Immunity Institute, VU University Medical Center Amsterdam, the Netherlands.,Department of Anaesthesiology, Amsterdam Cardiovascular Sciences, Amsterdam Infection and Immunity Institute, VU University Medical Center Amsterdam, the Netherlands
| | - K L Parlevliet
- Department of Intensive Care Medicine, Amsterdam Cardiovascular Sciences, Amsterdam Infection and Immunity Institute, VU University Medical Center Amsterdam, the Netherlands
| | - M Beerepoot
- Department of Intensive Care Medicine, Amsterdam Cardiovascular Sciences, Amsterdam Infection and Immunity Institute, VU University Medical Center Amsterdam, the Netherlands
| | - P Schober
- Department of Anaesthesiology, Amsterdam Cardiovascular Sciences, Amsterdam Infection and Immunity Institute, VU University Medical Center Amsterdam, the Netherlands
| | - A Vonk
- Department of Cardiothoracic Surgery, Amsterdam Cardiovascular Sciences, Amsterdam Infection and Immunity Institute, VU University Medical Center Amsterdam, the Netherlands
| | - J W Twisk
- Department of Epidemiology and Biostatistics, Amsterdam Cardiovascular Sciences, Amsterdam Infection and Immunity Institute, VU University Medical Center Amsterdam, the Netherlands
| | - P W Elbers
- Department of Intensive Care Medicine, Amsterdam Cardiovascular Sciences, Amsterdam Infection and Immunity Institute, VU University Medical Center Amsterdam, the Netherlands
| | - C Boer
- Department of Anaesthesiology, Amsterdam Cardiovascular Sciences, Amsterdam Infection and Immunity Institute, VU University Medical Center Amsterdam, the Netherlands
| | - P R Tuinman
- Department of Intensive Care Medicine, Amsterdam Cardiovascular Sciences, Amsterdam Infection and Immunity Institute, VU University Medical Center Amsterdam, the Netherlands
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Brouwers C, Hooftman B, Vonk S, Vonk A, Stooker W, Te Gussinklo WH, Wesselink RM, Wagner C, de Bruijne MC. Benchmarking the use of blood products in cardiac surgery to stimulate awareness of transfusion behaviour : Results from a four-year longitudinal study. Neth Heart J 2016; 25:207-214. [PMID: 27987079 PMCID: PMC5313448 DOI: 10.1007/s12471-016-0936-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Introduction Cardiac operations account for a large proportion of the blood transfusions given each year, leading to high costs and an increased risk to patient safety. Therefore, it is important to explore initiatives to reduce transfusion rates. This study aims to provide a benchmark for transfusion practice by inter-hospital comparison of transfusion rates, blood product use and costs related to patients undergoing coronary artery bypass grafting (CABG), valve surgery or combined CABG and valve surgery. Methods Between 2010 and 2013, patients from four Dutch hospitals undergoing CABG, valve surgery or combined CABG and valve surgery (n = 11,150) were included by means of a retrospective longitudinal study design. Results In CABG surgery the transfusion rate ranged between 43 and 54%, in valve surgery between 54 and 67%, and in combined CABG and valve surgery between 80 and 88%. With the exception of one hospital, the trend in transfusion rate showed a significant decrease over time for all procedures. Hospitals differed significantly in the units of blood products given to each patient, and in the use of specific transfused combinations of blood products, such as red blood cells (RBCs) and a combination of RBCs, fresh frozen plasma (FFP) and platelets. Conclusion This study indicates that benchmarking blood product usage stimulates awareness of transfusion behaviour, which may lead to better patient safety and lower costs. Further studies are warranted to improve awareness of transfusion behaviour and increase the standardisation of transfusion practice in cardiac surgery.
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Affiliation(s)
- C Brouwers
- EMGO+ Institute for Health and Care Research, Department of Public and Occupational Health, VU University Medical Center, Amsterdam, The Netherlands.
| | - B Hooftman
- EMGO+ Institute for Health and Care Research, Department of Public and Occupational Health, VU University Medical Center, Amsterdam, The Netherlands
| | - S Vonk
- EMGO+ Institute for Health and Care Research, Department of Public and Occupational Health, VU University Medical Center, Amsterdam, The Netherlands
| | - A Vonk
- Department of Cardiothoracic Surgery, VU University Medical Center, Amsterdam, The Netherlands
| | - W Stooker
- Department of Cardiothoracic Surgery, Onze Lieve Vrouwe Gasthuis, Amsterdam, The Netherlands
| | - W H Te Gussinklo
- Department of Cardiothoracic Surgery, Academic Medical Center, Amsterdam, The Netherlands
| | - R M Wesselink
- Department of Anesthesiology and Intensive Care, St. Antonius Hospital, Nieuwegein, The Netherlands
| | - C Wagner
- EMGO+ Institute for Health and Care Research, Department of Public and Occupational Health, VU University Medical Center, Amsterdam, The Netherlands.,Netherlands institute for health services research (NIVEL), Utrecht, The Netherlands
| | - M C de Bruijne
- EMGO+ Institute for Health and Care Research, Department of Public and Occupational Health, VU University Medical Center, Amsterdam, The Netherlands
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Bell J, Yamamoto Y, Jenni H, Mclean L, Chiarella G, El-Essawi A, Glendza D, Antonitsis P, Boer C, Durandy Y, Erdoes G, Murkin J, Starinieri P, Starinieri P, Spriel A, Bauer A, McLean L, Medlam W, Bennett R, Bennett R, Turner E, Wallhead A, Winkler B, Erdös G, Eberle B, Carrel T, Medlam W, Bell J, Bennett R, Bennett R, Wallhead A, Turner E, Benvenuto D, Ciano M, Losito G, Mazzei V, Breitenbach I, Haupt B, Morjan M, Brower R, Harringer W, Dedieu F, Crispin V, Aunac S, Guennaoui T, Van Ruyssevelt P, Kostarellou G, Argiriadou H, Kleontas A, Deliopoulos A, Grosomanidis V, Anastasiadis K, Stolze A, Vonk A, Burtman D, Basciani R, Kröninger F, Gygax E, Jenni H, Reineke D, Stucki M, Hagenbuch N, Carrel T, Eberle B, Turkstra T, Mayer R, Robic B, Wen W, Yilmaz A, Robic B, Wen W, Yilmaz A, Nguyen-Vu M, Serrick C, Hausmann H, Eberle T, Troitzsch D, Johansen P, Nygaard H, Hasenkam J. 2nd International Symposium on Minimal Invasive Extracorporeal Technologies Athens, Greece, 9-11 June 2016001SAFETY IN THE EVOLVING MINIATURIZED EXTRACORPOREAL SYSTEM002THE CHALLENGE OF CLOSED CIRCUIT SYSTEM FOR ALL CARDIOPULMONARY BYPASS CASES003THE USE OF A MINIMAL INVASIVE EXTRACORPOREAL CIRCUIT FOR REWARMING PATIENTS FROM ACCIDENTAL HYPOTHERMIA: A PROSPECTIVE STUDY004WHAT ARE THE LIMITATIONS OF MINIATURIZED ADULT CARDIOPULMONARY BYPASS? OUR FINDINGS005AORTIC VALVE SURGERY AND CORONARY BYPASS SURGERY IN DIALYZED PATIENTS. MAY MINIMAL EXTRACORPOREAL CIRCULATION BE HELPFUL IN GETTING BETTER RESULTS?006IMPACT OF MINIMAL EXTRACORPOREAL CIRCULATION IN OCTOGENARIANS UNDERGOING CORONARY ARTERY BYPASS GRAFTING. HAVE WE BEEN LOOKING IN THE WRONG DIRECTION?007CORONARY ARTERY BYPASS GRAFTING ON BEATING HEART, ON CARDIOPULMONARY BYPASS OR ON MINIMAL EXTRACORPOREAL CIRCULATION008MINIMAL INVASIVE EXTRACORPOREAL CIRCULATION IMPROVES QUALITY OF LIFE AFTER CORONARY ARTERY BYPASS GRAFTING009MINIMAL INVASIVE DETERMINATIONS OF OXYGEN DELIVERY (DO 2) AND CONSUMPTION (VO 2) IN CARDIAC SURGERY010CONTINUOUS MONITORING OF PERFUSION INDEX AND PULSE OXIMETRY DURING WARM PULSATILE PERFUSION IN PAEDIATRICS011CEREBRAL MICROEMBOLIZATION IN PATIENTS UNDERGOING SURGICAL AORTIC VALVE REPLACEMENT ON MINIMAL INVASIVE OR CONVENTIONAL EXTRACORPOREAL CIRCULATION012ASSESSMENT OF AUTOMATED SOMATOSENSORY EVOKED POTENTIALS FOR DETECTION OF INTRAOPERATIVE POSITIONAL NEUROPRAXIA IN CARDIAC SURGERY013MINIMAL INVASIVE EXTRACORPOREAL CIRCULATION IN MINIMALLY INVASIVE AORTIC VALVE SURGERY014MINIMAL INVASIVE EXTRACORPOREAL CIRCULATION IN ENDOSCOPIC MITRAL VALVE SURGERY015AIR HANDLING CAPABILITY OF A CONVENTIONAL CARDIOPULMONARY BYPASS VERSUS MINIMIZED EXTRACORPOREAL CIRCUIT USING THE FUSION OXYGENATOR016DOES MINIMALLY INVASIVE EXTRACORPOREAL CIRCULATION AND CELL SALVAGE REDUCE INFLAMMATION AFTER CORONARY ARTERY BYPASS GRAFTING SURGERY? Interact Cardiovasc Thorac Surg 2016. [DOI: 10.1093/icvts/ivw269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Groot KDWD, Janssens H, Uum RV, Dekkers J, Tiddens H, Berkers G, Vonk A, Kruisselbrink E, Vries R, Clevers H, Houwen R, Escher J, Beekman J, van der Ent C. 23 Stratifying young children with cystic fibrosis for disease severity using intestinal organoid swelling, intestinal current measurements or sweat chloride concentration as CFTR-dependent biomarker. J Cyst Fibros 2016. [DOI: 10.1016/s1569-1993(16)30263-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Veerhoek D, Groepenhoff F, van der Sluijs M, de Wever J, Blankensteijn J, Vonk A, Boer C, Vermeulen C. Heparin responsiveness during arterial vascular surgery: is a fixed heparin dose adequate? J Cardiothorac Vasc Anesth 2016. [DOI: 10.1053/j.jvca.2016.03.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Siregar S, Nieboer D, Vergouwe Y, Versteegh M, Noyez L, Vonk A, Steyerberg E, Takkenberg JJM. 024 * IMPROVED PREDICTION BY DYNAMIC MODELLING: AN EXPLORATORY STUDY IN THE ADULT CARDIAC SURGERY DATABASE OF THE NETHERLANDS ASSOCIATION FOR CARDIO-THORACIC SURGERY. Interact Cardiovasc Thorac Surg 2014. [DOI: 10.1093/icvts/ivu276.24] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Reinart-Okugbeni R, Vonk A, Uustare A, Gyulai Z, Sipos A, Rinken A. 1-substituted apomorphines as potent dopamine agonists. Bioorg Med Chem 2013; 21:4143-50. [DOI: 10.1016/j.bmc.2013.05.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Revised: 05/05/2013] [Accepted: 05/08/2013] [Indexed: 01/12/2023]
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Matrov D, Vonk A, Herm L, Rinken A, Harro J. Activating effects of chronic variable stress in rats with different exploratory activity: association with dopamine d(1) receptor function in nucleus accumbens. Neuropsychobiology 2011; 64:110-22. [PMID: 21701229 DOI: 10.1159/000325224] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Accepted: 01/23/2011] [Indexed: 01/11/2023]
Abstract
BACKGROUND/AIMS Rats display persistent behavioural phenotypes of low (LE) versus high (HE) exploratory activity in the exploration box paradigm. LE rats that prefer passive coping strategies show differential dopaminergic activity in the striatum. The main hypothesis of this study was that chronic variable stress (CVS) would have a higher impact on LE rats. METHODS Animals were submitted to a CVS regimen lasting 32 days that was followed by a behavioural test battery. The functional states of their dopamine D(1) and D(2) receptors were measured in the striatum and nucleus accumbens (NAcc). Cerebral oxidative metabolism was assessed via cytochrome c oxidase histochemistry in 65 brain regions. RESULTS CVS decreased weight gain, to a higher extent in LE rats, and lowered the sucrose preference after the first week, but habituation to the anhedonic effect had developed by the end of the experiment. CVS did not change the behavioural phenotypes initially assigned. No effect of stress on D(2) receptor function was found. Chronically stressed animals exhibited higher levels of social interaction and D(1) receptor-mediated cAMP accumulation in the NAcc, but not in the striatum. CVS was associated with higher oxidative metabolism levels in the anteroventral thalamus, median raphe nuclei and central periaqueductal grey matter. These changes after stress did not depend upon the exploratory phenotype. CONCLUSION This study revealed changes in brain biochemistry after habituation to CVS that might be implicated in successful adaptation to chronic stress.
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Affiliation(s)
- Denis Matrov
- Department of Psychology, Centre of Behavioural and Health Sciences, University of Tartu, Tartu, Estonia
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Reinart R, Gyulai Z, Berényi S, Antus S, Vonk A, Rinken A, Sipos A. New 2-thioether-substituted apomorphines as potent and selective dopamine D2 receptor agonists. Eur J Med Chem 2011; 46:2992-9. [DOI: 10.1016/j.ejmech.2011.04.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Revised: 03/30/2011] [Accepted: 04/08/2011] [Indexed: 11/24/2022]
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Wahba A, Vonk A, Bidstrup B. Conference discussion: Removal of aprotinin from low-dose aprotinin/tranexamic acid antifibrinolytic therapy increases transfusion requirements in cardiothoracic surgery. Interact Cardiovasc Thorac Surg 2011; 12:139-140. [PMID: 21322159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
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Abstract
We have characterized the modulation of adenylyl cyclase (AC) activity by ligands of dopaminergic receptors in rat striatal homogenate and compared the results with receptor-ligand binding affinities. Despite the fact that rat striatum contains high level of both dopamine D(1) and D(2) receptors, only the D(1)-specific AC activation by agonists could be determined. All D(1)-receptor agonists (dopamine, dihydrexidine, and A 77636) used were able to increase cAMP accumulation in a concentration-dependent manner, while D(1)-receptor antagonists (SCH23390, SKF83566, and butaclamol) blocked the effects induced by the aforementioned agonists. At the same time, the D(2)-receptor agonist quinpirole and antagonist sulpiride had no effect on cAMP accumulation in striatal homogenate neither on the basal level nor on the activated level of AC, while inhibited [(3)H]raclopride binding to these membranes. Comparing the ligands of the D(1) receptor in modulating the activity of AC and displacing D(1)-receptor-specific radioligand [(3)H]SCH23390 binding revealed that the ligands modulate both of these processes with similar affinities. It indicates that under given experimental conditions, only dopamine D(1)-receptor-mediated stimulation of AC activity can be measured in membrane homogenate of rat striatum, while dopamine D(2)-receptor effects remain fully hidden.
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Affiliation(s)
- Argo Vonk
- Institute of Chemistry, University of Tartu, Jakobi 2, Tartu, Estonia
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Uustare A, Vonk A, Terasmaa A, Fuxe K, Rinken A. Kinetic and functional properties of [3H]ZM241385, a high affinity antagonist for adenosine A2A receptors. Life Sci 2004; 76:1513-26. [PMID: 15680315 DOI: 10.1016/j.lfs.2004.10.027] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2004] [Accepted: 10/02/2004] [Indexed: 12/01/2022]
Abstract
We have characterized the binding of [2-(3)H]-4-(2-[7-Amino-2-(2-furyl)-[1,2,4]-triazolo-[2,3-a]-[1,3,5]-triazin-5-ylamino]ethyl)phenol ([(3)H]ZM241385) to adenosine A(2A) receptors in membranes of rat striatum and transfected CHO cells. Saturation experiments showed that [(3)H]ZM241385 binds to a single class of binding sites with high affinity (K(d) = 0.23 nM and 0.14 nM in CHO cell and striatal membranes, respectively). The membranes of CHO cells required pretreatment with adenosine deaminase (ADA) to achieve high-affinity binding, while ADA had no influence on the ligand binding properties in striatal membranes. The binding of [(3)H]ZM241385 was fast and reversible, achieving equilibrium within 20 minutes at all radioligand concentrations. The kinetic analysis of the [(3)H]ZM241385 interaction with A(2A) receptors indicated that the reaction had at least two subsequent steps. The first step corresponds to a fast equilibrium, which also determines the antagonist potency to competitively inhibit CGS21680-induced accumulation of cAMP (first equilibrium constant K(A) = 6.6 nM). The second step corresponds to a slow process of conformational isomerization (equilibrium constant K(i) = 0.03). The combination of the two steps gives the dissociation constant K(d) = 0.20 nM based on the kinetic data, which is in good agreement with the directly measured value. The data obtained shed light on the mechanism of the [(3)H]ZM241385 interaction with adenosine A(2A) receptors from different sources in vitro. The isomerization step of the A(2A) antagonist radioligand binding has to be taken into account for the interpretation of the binding parameters obtained from the various competition assays and explain the discrepancy between antagonist affinity in saturation experiments versus its potency in functional assays.
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Affiliation(s)
- Ain Uustare
- Institute of Organic and Bioorganic Chemistry, University of Tartu, Jakobi Str. 2, EE-51014 Tartu, Estonia
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Baufreton C, Intrator L, Jansen PG, te Velthuis H, Le Besnerais P, Vonk A, Farcet JP, Wildevuur CR, Loisance DY. Inflammatory response to cardiopulmonary bypass using roller or centrifugal pumps. Ann Thorac Surg 1999; 67:972-7. [PMID: 10320237 DOI: 10.1016/s0003-4975(98)01345-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
BACKGROUND The inflammatory response in 29 patients undergoing coronary artery bypass grafting using either roller or centrifugal (CFP) pumps was evaluated in a prospective study. METHODS Patients were randomized in roller pump (n = 15) and CFP (n = 14) groups. Terminal complement complex activation (SC5b-9) and neutrophil activation (elastase) were assessed during the operation. Cytokine production (tumor necrosis factor-alpha, interleukin-6, interleukin-8) and circulating adhesion molecules (soluble endothelial-leukocyte adhesion molecule-1 and intercellular adhesion molecule-1) were assessed after the operation. RESULTS Release of SC5b-9 after stopping cardiopulmonary bypass and after protamine administration was higher in the CFP group (p = 0.01 and p = 0.004). Elastase level was higher after stopping cardiopulmonary bypass using CFP (p = 0.006). Multivariate analysis confirmed differences between roller pump and CFP groups in complement and neutrophil activation. After the operation, a significant production of cytokines was detected similarly in both groups, with peak values observed within the range of 4 to 6 hours after starting cardiopulmonary bypass. However, interleukin-8 levels were higher using CFP 2 hours after starting cardiopulmonary bypass (p = 0.02). Plasma levels of adhesion molecules were similar in both groups within the investigation period. CONCLUSIONS During the operation, CFP caused greater complement and neutrophil activation. After the operation, the inflammatory response was similar using either roller pump or CFP.
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Affiliation(s)
- C Baufreton
- Department of Thoracic and Cardiovascular Surgery, Hôpital Henri Mondor, Créteil, France
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