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Moreira-Costa L, Tavares-Silva M, Almeida-Coelho J, Gonçalves A, Trindade F, Vasques-Nóvoa F, Sousa-Mendes C, Leite S, Vitorino R, Falcão-Pires I, Leite-Moreira AF, Lourenço AP. Acute and chronic effects of levosimendan in the ZSF1 obese rat model of heart failure with preserved ejection fraction. Eur J Pharmacol 2024; 966:176336. [PMID: 38272343 DOI: 10.1016/j.ejphar.2024.176336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 01/02/2024] [Accepted: 01/16/2024] [Indexed: 01/27/2024]
Abstract
Heart failure with preserved ejection fraction (HFpEF) is a syndrome characterized by impaired cardiovascular reserve in which therapeutic options are scarce. Our aim was to evaluate the inodilator levosimendan in the ZSF1 obese rat model of HFpEF. Twenty-week-old male Wistar-Kyoto (WKY), ZSF1 lean (ZSF1 Ln) and ZSF1 obese rats chronically treated for 6-weeks with either levosimendan (1 mg/kg/day, ZSF1 Ob + Levo) or vehicle (ZSF1 Ob + Veh) underwent peak-effort testing, pressure-volume (PV) haemodynamic evaluation and echocardiography (n = 7 each). Samples were collected for histology and western blotting. In obese rats, skinned and intact left ventricular (LV) cardiomyocytes underwent in vitro functional evaluation. Seven additional ZSF1 obese rats underwent PV evaluation to assess acute levosimendan effects (10 μg/kg + 0.1 μg/kg/min). ZSF1 Ob + Veh presented all hallmarks of HFpEF, namely effort intolerance, elevated end-diastolic pressures and reduced diastolic compliance as well as increased LV mass and left atrial area, cardiomyocyte hypertrophy and increased interstitial fibrosis. Levosimendan decreased systemic arterial pressures, raised cardiac index, and enhanced LV relaxation and diastolic compliance in both acute and chronic experiments. ZSF1 Ob + Levo showed pronounced attenuation of hypertrophy and interstitial fibrosis alongside increased effort tolerance (endured workload raised 38 %) and maximum O2 consumption. Skinned cardiomyocytes from ZSF 1 Ob + Levo showed a downward shift in sarcomere length-passive tension relationship and intact cardiomyocytes showed decreased diastolic Ca2+ levels and enhanced Ca2+ sensitivity. On molecular grounds, levosimendan enhanced phosphorylation of phospholamban and mammalian target of rapamycin. The observed effects encourage future clinical trials with levosimendan in a broad population of HFpEF patients.
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Affiliation(s)
- Liliana Moreira-Costa
- Cardiovascular R&D Centre - UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal.
| | - Marta Tavares-Silva
- Cardiovascular R&D Centre - UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal; Department of Cardiology, Centro Hospitalar Universitário São João, Porto, Portugal
| | - João Almeida-Coelho
- Cardiovascular R&D Centre - UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Alexandre Gonçalves
- Cardiovascular R&D Centre - UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Fábio Trindade
- Cardiovascular R&D Centre - UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Francisco Vasques-Nóvoa
- Cardiovascular R&D Centre - UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal; Department of Medicine, Centro Hospitalar Universitário São João, Porto, Portugal
| | - Cláudia Sousa-Mendes
- Cardiovascular R&D Centre - UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Sara Leite
- Cardiovascular R&D Centre - UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Rui Vitorino
- Cardiovascular R&D Centre - UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal; Department of Medical Sciences, Institute of Biomedicine (iBiMED), University of Aveiro, Aveiro, Portugal
| | - Inês Falcão-Pires
- Cardiovascular R&D Centre - UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Adelino F Leite-Moreira
- Cardiovascular R&D Centre - UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal; Department of Cardiothoracic Surgery, Centro Hospitalar Universitário São João, Porto, Portugal
| | - André P Lourenço
- Cardiovascular R&D Centre - UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal; Department of Anaesthesiology, Centro Hospitalar Universitário São João, Porto, Portugal
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Sanfilippo F, Messina A, Scolletta S, Bignami E, Morelli A, Cecconi M, Landoni G, Romagnoli S. The "CHEOPS" bundle for the management of Left Ventricular Diastolic Dysfunction in critically ill patients: an experts' opinion. Anaesth Crit Care Pain Med 2023; 42:101283. [PMID: 37516408 DOI: 10.1016/j.accpm.2023.101283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 07/18/2023] [Accepted: 07/19/2023] [Indexed: 07/31/2023]
Abstract
The impact of left ventricular (LV) diastolic dysfunction (DD) on the outcome of patients with heart failure was established over three decades ago. Nevertheless, the relevance of LVDD for critically ill patients admitted to the intensive care unit has seen growing interest recently, and LVDD is associated with poor prognosis. Whilst an assessment of LV diastolic function is desirable in critically ill patients, treatment options for LVDD are very limited, and pharmacological possibilities to rapidly optimize diastolic function have not been found yet. Hence, a proactive approach might have a substantial role in improving the outcomes of these patients. Recalling historical Egyptian parallelism suggesting that Doppler echocardiography has been the "Rosetta stone" to decipher the study of LV diastolic function, we developed a potentially useful acronym for physicians at the bedside to optimize the management of critically ill patients with LVDD with the application of the bundle. We summarized the bundle under the acronym of the famous ancient Egyptian pharaoh CHEOPS: Chest Ultrasound, combining information from echocardiography and lung ultrasound; HEmodynamics assessment, with careful evaluation of heart rate and rhythm, as well as afterload and vasoactive drugs; OPtimization of mechanical ventilation and pulmonary circulation, considering the effects of positive end-expiratory pressure on both right and left heart function; Stabilization, with cautious fluid administration and prompt fluid removal whenever judged safe and valuable. Notably, the CHEOPS bundle represents experts' opinion and are not targeted at the initial resuscitation phase but rather for the optimization and subsequent period of critical illness.
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Affiliation(s)
- Filippo Sanfilippo
- Department of Anaesthesia and Intensive Care, A.O.U. Policlinico-San Marco, Catania, Italy; Department of General Surgery and Medico-Surgical Specialties, School of Anaesthesia and Intensive Care, University of Catania, Catania, Italy.
| | - Antonio Messina
- Department of Anesthesia and Intensive Care Medicine, Humanitas Clinical and Research Center IRCCS, 20089, Rozzano, Milan, Italy.
| | - Sabino Scolletta
- Anesthesia and Intensive Care Unit, University Hospital of Siena, University of Siena, Siena, Italy.
| | - Elena Bignami
- Anesthesiology, Critical Care and Pain Medicine Division, Department of Medicine and Surgery, University of Parma, Parma, Italy.
| | - Andrea Morelli
- Department Clinical Internal, Anesthesiological and Cardiovascular Sciences, University of Rome, "La Sapienza", Policlinico Umberto Primo, Roma, Italy.
| | - Maurizio Cecconi
- Department of Anesthesia and Intensive Care Medicine, Humanitas Clinical and Research Center IRCCS, 20089, Rozzano, Milan, Italy.
| | - Giovanni Landoni
- Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Faculty of Medicine, Vita-Salute San Raffaele University, Milan, Italy.
| | - Stefano Romagnoli
- Department of Health Science, Section of Anaesthesia and Intensive Care, University of Florence, Department of Anetshesia and Critical Care, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy.
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Selli AL, Ghasemi M, Watters T, Burton F, Smith G, Dietrichs ES. Proarrhythmic changes in human cardiomyocytes during hypothermia by milrinone and isoprenaline, but not levosimendan: an experimental in vitro study. Scand J Trauma Resusc Emerg Med 2023; 31:61. [PMID: 37880801 PMCID: PMC10601188 DOI: 10.1186/s13049-023-01134-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 10/15/2023] [Indexed: 10/27/2023] Open
Abstract
BACKGROUND Accidental hypothermia, recognized by core temperature below 35 °C, is a lethal condition with a mortality rate up to 25%. Hypothermia-induced cardiac dysfunction causing increased total peripheral resistance and reduced cardiac output contributes to the high mortality rate in this patient group. Recent studies, in vivo and in vitro, have suggested levosimendan, milrinone and isoprenaline as inotropic treatment strategies in this patient group. However, these drugs may pose increased risk of ventricular arrhythmias during hypothermia. Our aim was therefore to describe the effects of levosimendan, milrinone and isoprenaline on the action potential in human cardiomyocytes during hypothermia. METHODS Using an experimental in vitro-design, levosimendan, milrinone and isoprenaline were incubated with iCell2 hiPSC-derived cardiomyocytes and cellular action potential waveforms and contraction were recorded from monolayers of cultured cells. Experiments were conducted at temperatures from 37 °C down to 26 °C. One-way repeated measures ANOVA was performed to evaluate differences from baseline recordings and one-way ANOVA was performed to evaluate differences between drugs, untreated control and between drug concentrations at the specific temperatures. RESULTS Milrinone and isoprenaline both significantly increases action potential triangulation during hypothermia, and thereby the risk of ventricular arrhythmias. Levosimendan, however, does not increase triangulation and the contractile properties also remain preserved during hypothermia down to 26 °C. CONCLUSIONS Levosimendan remains a promising candidate drug for inotropic treatment of hypothermic patients as it possesses ability to treat hypothermia-induced cardiac dysfunction and no increased risk of ventricular arrhythmias is detected. Milrinone and isoprenaline, on the other hand, appears more dangerous in the hypothermic setting.
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Affiliation(s)
- Anders Lund Selli
- Experimental and Clinical Pharmacology, Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, Postboks 6050, 9037, Langnes, Tromsø, Norway
| | | | | | - Francis Burton
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, Scotland
- Clyde Biosciences, Newhouse, Scotland
| | - Godfrey Smith
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, Scotland
- Clyde Biosciences, Newhouse, Scotland
| | - Erik Sveberg Dietrichs
- Experimental and Clinical Pharmacology, Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, Postboks 6050, 9037, Langnes, Tromsø, Norway.
- Center for Psychopharmacology, Diakonhjemmet Hospital, Oslo, Norway.
- Institute of Oral Biology, University of Oslo, Oslo, Norway.
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Linardi D, Mani R, Di Nicola V, Perrone F, Martinazzi S, Tessari M, Faggian G, Luciani GB, Rungatscher A. Validation of a new model of selective antegrade cerebral perfusion with circulatory arrest in rats. Perfusion 2023:2676591231181849. [PMID: 37278014 DOI: 10.1177/02676591231181849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
BACKGROUND Selective antegrade cerebral perfusion (SACP) is adopted as an alternative to deep hypothermic circulatory arrest (DHCA) during aortic arch surgery. However, there is still no preclinical evidence to support the use of SACP associated with moderate hypothermia (28-30°C) instead of DHCA (18-20°C). The present study aims to develop a reliable and reproducible preclinical model of cardiopulmonary bypass (CPB) with SACP applicable for assessing the best temperature management. MATERIALS AND METHODS A central cannulation through the right jugular vein and the left carotid artery was performed, and CPB was instituted.Animals were randomized into two groups: normothermic circulatory arrest without or with cerebral perfusion (NCA vs SACP). EEG monitoring was maintained during CPB. After 10 min of circulatory arrest, rats underwent 60 min of reperfusion. After that, animals were sacrificed, and brains were collected for histology and molecular biology analysis. RESULTS Power spectral analysis of the EEG signal showed decreased activity in both cortical regions and lateral thalamus in all rats during the circulatory arrest. Only SACP determined complete recovery of brain activity and higher power spectral signal compared to NCA (p < 0.05). Histological damage scores and western blot analysis of inflammatory and apoptotic proteins like caspase-3 and Poly-ADP ribose polymerase (PARP) were significantly lower in SACP compared to NCA. Vascular endothelial growth factor (VEGF) and RNA binding protein 3 (RBM3) involved in cell-protection mechanisms were higher in SACP, showing better neuroprotection (p < 0.05). CONCLUSIONS SACP by cannulation of the left carotid artery guarantees good perfusion of the whole brain in this rat model of CPB with circulatory arrest. The present model of SACP is reliable, repeatable, and not expensive, and it could be used in the future to achieve preclinical evidence for the best temperature management and to define the best cerebral protection strategy during circulatory arrest.
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Affiliation(s)
- Daniele Linardi
- Department of Cardiac Surgery, Azienda Ospedaliera Universitaria Integrata Verona, Verona, Italy
| | - Romel Mani
- Università degli Studi di Verona, Verona, Italy
| | - Venanzio Di Nicola
- Department of Cardiac Surgery, Azienda Ospedaliera Universitaria Integrata Verona, Verona, Italy
| | - Fabiola Perrone
- Department of Cardiac Surgery, Azienda Ospedaliera Universitaria Integrata Verona, Verona, Italy
| | - Sara Martinazzi
- Department of Cardiac Surgery, Azienda Ospedaliera Universitaria Integrata Verona, Verona, Italy
| | - Maddalena Tessari
- Department of Cardiac Surgery, Azienda Ospedaliera Universitaria Integrata Verona, Verona, Italy
| | - Giuseppe Faggian
- Department of Cardiac Surgery, Azienda Ospedaliera Universitaria Integrata Verona, Verona, Italy
| | | | - Alessio Rungatscher
- Department of Cardiac Surgery, Azienda Ospedaliera Universitaria Integrata Verona, Verona, Italy
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Kayumov M, Habimana R, Kim D, Obiweluozor FO, Jeong IS, Cho HJ. Extracorporeal circulation models in small animals: beyond the limits of preclinical research. Acute Crit Care 2023; 38:1-7. [PMID: 36935529 PMCID: PMC10030238 DOI: 10.4266/acc.2023.00381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 02/24/2023] [Indexed: 03/03/2023] Open
Abstract
Extracorporeal membrane oxygenation (ECMO) use has remarkably increased in recent years. Although ECMO has become essential for patients with refractory cardiac and respiratory failure, extracorporeal circulation (ECC) is associated with significant complications. Small-animal models of ECC have been developed and widely used to better understand ECC-induced pathophysiology. This review article summarizes the development of small-animal ECC models, including the animal species, circuit configuration, priming, perioperative procedures, cannulation, and future perspectives of small-animal ECMO models.
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Affiliation(s)
- Mukhammad Kayumov
- Department of Medical Science, Chonnam National University Graduate School, Gwangju, Korea
- Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hospital, Chonnam National University Hospital Medical School, Gwangju, Korea
- Extracorporeal Circulation Research Team, Chonnam National University Hospital, Gwangju, Korea
| | - Reverien Habimana
- Extracorporeal Circulation Research Team, Chonnam National University Hospital, Gwangju, Korea
- Department of Biomedical Sciences, Chonnam National University Graduate School, Chonnam National University Medical School, Gwangju, Korea
| | - Dowan Kim
- Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hospital, Chonnam National University Hospital Medical School, Gwangju, Korea
- Extracorporeal Circulation Research Team, Chonnam National University Hospital, Gwangju, Korea
| | - Francis O Obiweluozor
- Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hospital, Chonnam National University Hospital Medical School, Gwangju, Korea
- Extracorporeal Circulation Research Team, Chonnam National University Hospital, Gwangju, Korea
| | - In Seok Jeong
- Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hospital, Chonnam National University Hospital Medical School, Gwangju, Korea
- Extracorporeal Circulation Research Team, Chonnam National University Hospital, Gwangju, Korea
| | - Hwa Jin Cho
- Extracorporeal Circulation Research Team, Chonnam National University Hospital, Gwangju, Korea
- Department of Pediatrics, Chonnam National University Children's Hospital and Chonnam National University Medical School, Gwangju, Korea
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McMillan M. Management of severe hypothermia and pulsus alternans in an anaesthetised cat. VETERINARY RECORD CASE REPORTS 2023. [DOI: 10.1002/vrc2.557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Matthew McMillan
- Queen Mother Hospital for Small Animals The Royal Veterinary College Hatfield UK
- The Ralph Veterinary Referral Centre Marlow UK
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7
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Kuzmiszyn AK, Selli AL, Smaglyukova N, Kondratiev T, Fuskevåg OM, Lyså RA, Ravna AW, Tveita T, Sager G, Dietrichs ES. Treatment of Cardiovascular Dysfunction with PDE3-Inhibitors in Moderate and Severe Hypothermia—Effects on Cellular Elimination of Cyclic Adenosine Monophosphate and Cyclic Guanosine Monophosphate. Front Physiol 2022; 13:923091. [PMID: 35910566 PMCID: PMC9326216 DOI: 10.3389/fphys.2022.923091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 06/24/2022] [Indexed: 12/03/2022] Open
Abstract
Introduction: Rewarming from accidental hypothermia is often complicated by hypothermia-induced cardiovascular dysfunction, which could lead to shock. Current guidelines do not recommend any pharmacological treatment at core temperatures below 30°C, due to lack of knowledge. However, previous in vivo studies have shown promising results when using phosphodiesterase 3 (PDE3) inhibitors, which possess the combined effects of supporting cardiac function and alleviating the peripheral vascular resistance through changes in cyclic nucleotide levels. This study therefore aims to investigate whether PDE3 inhibitors milrinone, amrinone, and levosimendan are able to modulate cyclic nucleotide regulation in hypothermic settings. Materials and methods: The effect of PDE3 inhibitors were studied by using recombinant phosphodiesterase enzymes and inverted erythrocyte membranes at six different temperatures—37°C, 34°C, 32°C, 28°C, 24°C, and 20°C- in order to evaluate the degree of enzymatic degradation, as well as measuring cellular efflux of both cAMP and cGMP. The resulting dose-response curves at every temperature were used to calculate IC50 and Ki values. Results: Milrinone IC50 and Ki values for cGMP efflux were significantly lower at 24°C (IC50: 8.62 ± 2.69 µM) and 20°C (IC50: 7.35 ± 3.51 µM), compared to 37°C (IC50: 22.84 ± 1.52 µM). There were no significant changes in IC50 and Ki values for enzymatic breakdown of cAMP and cGMP. Conclusion: Milrinone, amrinone and levosimendan, were all able to suppress enzymatic degradation and inhibit extrusion of cGMP and cAMP below 30°C. Our results show that these drugs have preserved effect on their target molecules during hypothermia, indicating that they could provide an important treatment option for hypothermia-induced cardiac dysfunction.
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Affiliation(s)
- Adrina Kalasho Kuzmiszyn
- Norwegian Air Ambulance Foundation, Research and Development Department, Oslo, Norway
- Experimental and Clinical Pharmacology, Department of Medical Biology, UiT The Arctic University of Norway, Tromsø, Norway
- Division of Surgical Medicine and Intensive Care, University Hospital of North Norway, Tromsø, Norway
| | - Anders Lund Selli
- Experimental and Clinical Pharmacology, Department of Medical Biology, UiT The Arctic University of Norway, Tromsø, Norway
| | - Natalia Smaglyukova
- Experimental and Clinical Pharmacology, Department of Medical Biology, UiT The Arctic University of Norway, Tromsø, Norway
| | - Timofei Kondratiev
- Anesthesia and Critical Care Research Group, Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
| | - Ole-Martin Fuskevåg
- Department of Laboratory Medicine, Division of Diagnostic Services, University Hospital of North Norway, Tromsø, Norway
| | - Roy Andre Lyså
- Experimental and Clinical Pharmacology, Department of Medical Biology, UiT The Arctic University of Norway, Tromsø, Norway
| | - Aina Westrheim Ravna
- Experimental and Clinical Pharmacology, Department of Medical Biology, UiT The Arctic University of Norway, Tromsø, Norway
| | - Torkjel Tveita
- Division of Surgical Medicine and Intensive Care, University Hospital of North Norway, Tromsø, Norway
- Anesthesia and Critical Care Research Group, Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
| | - Georg Sager
- Experimental and Clinical Pharmacology, Department of Medical Biology, UiT The Arctic University of Norway, Tromsø, Norway
| | - Erik Sveberg Dietrichs
- Experimental and Clinical Pharmacology, Department of Medical Biology, UiT The Arctic University of Norway, Tromsø, Norway
- Center for Psychopharmacology, Diakonhjemmet Hospital, Oslo, Norway
- *Correspondence: Erik Sveberg Dietrichs,
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Linardi D, Mani R, Murari A, Dolci S, Mannino L, Decimo I, Tessari M, Martinazzi S, Gottin L, Luciani GB, Faggian G, Rungatscher A. Nitric Oxide in Selective Cerebral Perfusion Could Enhance Neuroprotection During Aortic Arch Surgery. Front Cardiovasc Med 2022; 8:772065. [PMID: 35096996 PMCID: PMC8795629 DOI: 10.3389/fcvm.2021.772065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 12/14/2021] [Indexed: 12/01/2022] Open
Abstract
Background Hypothermic circulatory arrest (HCA) in aortic arch surgery has a significant risk of neurological injury despite the newest protective techniques and strategies. Nitric oxide (NO) could exert a protective role, reduce infarct area and increase cerebral perfusion. This study aims to investigate the possible neuroprotective effects of NO administered in the oxygenator of selective antegrade cerebral perfusion (SCP) during HCA. Methods Thirty male SD adult rats (450–550 g) underwent cardiopulmonary bypass (CPB), cooling to 22°C body core temperature followed by 30 min of HCA. Rats were randomized to receive SCP or SCP added with NO (20 ppm) administered through the oxygenator (SCP-NO). All animals underwent CPB-assisted rewarming to a target temperature of 35°C in 60 min. At the end of the experiment, rats were sacrificed, and brain collected. Immunofluorescence analysis was performed in blind conditions. Results Neuroinflammation assessed by allograft inflammatory factor 1 or ionized calcium-binding adapter molecule 1 expression, a microglia activation marker was lower in SCP-NO compared to SCP (4.11 ± 0.59 vs. 6.02 ± 0.18%; p < 0.05). Oxidative stress measured by 8oxodG, was reduced in SCP-NO (0.37 ± 0.01 vs. 1.03 ± 0.16%; p < 0.05). Brain hypoxic area extent, analyzed by thiols oxidation was attenuated in SCP-NO (1.85 ± 0.10 vs. 2.74 ± 0.19%; p < 0.05). Furthermore, the apoptotic marker caspases 3 was significantly reduced in SCP-NO (10.64 ± 0.37 vs. 12.61 ± 0.88%; p < 0.05). Conclusions Nitric oxide administration in the oxygenator during SCP and HCA improves neuroprotection by decreasing neuroinflammation, optimizing oxygen delivery by reducing oxidative stress and hypoxic areas, finally decreasing apoptosis.
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Affiliation(s)
- Daniele Linardi
- Division of Cardiac Surgery, Department of Surgery, University of Verona, Verona, Italy
- *Correspondence: Daniele Linardi
| | - Romel Mani
- Division of Cardiac Surgery, Department of Surgery, University of Verona, Verona, Italy
| | - Angela Murari
- Division of Cardiac Surgery, Department of Surgery, University of Verona, Verona, Italy
| | - Sissi Dolci
- Department of Pharmacology, University of Verona, Verona, Italy
| | - Loris Mannino
- Department of Pharmacology, University of Verona, Verona, Italy
| | - Ilaria Decimo
- Department of Pharmacology, University of Verona, Verona, Italy
| | - Maddalena Tessari
- Division of Cardiac Surgery, Department of Surgery, University of Verona, Verona, Italy
| | - Sara Martinazzi
- Division of Cardiac Surgery, Department of Surgery, University of Verona, Verona, Italy
| | - Leonardo Gottin
- Division of Cardio-Thoracic Anesthesiology and Intensive Care, Department of Surgery, University of Verona, Verona, Italy
| | - Giovanni B. Luciani
- Division of Cardiac Surgery, Department of Surgery, University of Verona, Verona, Italy
| | - Giuseppe Faggian
- Division of Cardiac Surgery, Department of Surgery, University of Verona, Verona, Italy
| | - Alessio Rungatscher
- Division of Cardiac Surgery, Department of Surgery, University of Verona, Verona, Italy
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9
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Cho HJ, Kayumov M, Kim D, Lee K, Onyekachi FO, Jeung KW, Kim Y, Suen JY, Fraser JF, Jeong IS. Acute Immune Response in Venoarterial and Venovenous Extracorporeal Membrane Oxygenation Models of Rats. ASAIO J 2021; 67:546-553. [PMID: 32826395 DOI: 10.1097/mat.0000000000001265] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Although experimental extracorporeal membrane oxygenation (ECMO) animal models have been reported, there are few studies on the immune response to ECMO. We developed the venoarterial (VA) and venovenous (VV) model in rats and serially investigated the changes in the distribution of immune cells. Forty rats underwent both VA and VV modes of ECMO, and blood samples were collected at 1 day before ECMO (D-1), at the end of ECMO run (D+0), and 3 days after the ECMO (D+3). Flow cytometry was used to characterize surface marker expression (CD3, CD4, CD8, CD43, CD45, CD45R, CD161, and His48) on immune cells. Granulocytes were initially activated in both ECMO types and were further reduced but not normalized until 3 days of decannulation. Monocyte and natural killer cells were decreased initially in VA mode. B lymphocytes, helper T lymphocytes, and cytotoxic T lymphocytes also significantly decreased in VA modes after ECMO, but this phenomenon was not prominent in the VV modes. Overall immune cells proportion changed after ECMO run in both modes, and the immunologic balance altered significantly in the VA than in VV mode. Our ECMO model is feasible for the hemodynamic and immunologic research, and further long-term evaluation is needed.
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Affiliation(s)
- Hwa-Jin Cho
- From the Department of Pediatrics, Chonnam National University Children's Hospital and Medical School, Gwangju, Republic of Korea
- Critical Care Research Group, The Prince Charles Hospital, Chermside, QLD, Australia
- Faculty of Medicine, University of Queensland, St Lucia, QLD, Australia
| | - Mukhammad Kayumov
- Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hospital and Medical School, Gwangju, Republic of Korea
| | - Dowan Kim
- Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hospital and Medical School, Gwangju, Republic of Korea
| | - Kyoseon Lee
- Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hospital and Medical School, Gwangju, Republic of Korea
| | - Francis Obiweluozor Onyekachi
- Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hospital and Medical School, Gwangju, Republic of Korea
| | - Kyung-Woon Jeung
- Department of Emergency Medicine, Chonnam National University Hospital and Medical School, Gwangju, Republic of Korea
| | - Yongsook Kim
- Biomedical Research Institute, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Jacky Y Suen
- Critical Care Research Group, The Prince Charles Hospital, Chermside, QLD, Australia
- Faculty of Medicine, University of Queensland, St Lucia, QLD, Australia
| | - John F Fraser
- Critical Care Research Group, The Prince Charles Hospital, Chermside, QLD, Australia
- Faculty of Medicine, University of Queensland, St Lucia, QLD, Australia
| | - In-Seok Jeong
- Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hospital and Medical School, Gwangju, Republic of Korea
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Immohr MB, Pinto A, Jenke A, Boeken U, Lichtenberg A, Akhyari P. Prävention von Ischämie‑/Reperfusionsschäden. ZEITSCHRIFT FUR HERZ THORAX UND GEFASSCHIRURGIE 2020. [DOI: 10.1007/s00398-020-00394-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Wang CH, Chang WT, Tsai MS, Huang CH, Chen WJ. Synergistic Effects of Moderate Therapeutic Hypothermia and Levosimendan on Cardiac Function and Survival After Asphyxia-Induced Cardiac Arrest in Rats. J Am Heart Assoc 2020; 9:e016139. [PMID: 32476598 PMCID: PMC7429058 DOI: 10.1161/jaha.120.016139] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Background This study investigated whether levosimendan, an inotropic calcium sensitizer, when combined with moderate therapeutic hypothermia, may exert synergistic benefits on post–cardiac arrest myocardial dysfunction and improve outcomes. Methods and Results After 9.5‐minute asphyxia‐induced cardiac arrest and resuscitation, 48 rats were randomized equally into 4 groups following return of spontaneous circulation (ROSC), including normothermia, hypothermia, normothermia–levosimendan, and hypothermia–levosimendan groups. For the normothermia group, the target temperature was 37°C while for the hypothermia group, the target temperature was 32°C, both of which were to be maintained for 4 hours after ROSC. Levosimendan was administered after ROSC with a loading dose of 10 μg/kg and then infused at 0.1 μg/kg per min for 4 hours. In the hypothermia–levosimendan group, left ventricular systolic function and cardiac output increased significantly, whereas the heart rate and systemic vascular resistance decreased significantly compared with the normothermia group. Also, the concentrations of interleukin 1β at 4 hours post‐ROSC and the production of NO between 1 hour and 4 hours post‐ROSC were reduced significantly in the hypothermia–levosimendan group compared with the normothermia group. The 72‐hour post‐ROSC survival and neurological recovery were also significantly better in the hypothermia–levosimendan group compared with the normothermia group (survival, 100% versus 50%, χ2 test, P=0.006). Conclusions Compared with normothermia, only combined moderate therapeutic hypothermia and levosimendan treatment could consistently improve post–cardiac arrest myocardial dysfunction and decrease the release of pro‐inflammatory molecules, thereby improving survival and neurological outcomes. These findings suggest synergistic benefits between moderate therapeutic hypothermia and levosimendan.
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Affiliation(s)
- Chih-Hung Wang
- Department of Emergency Medicine National Taiwan University Hospital Taipei Taiwan.,Department of Emergency Medicine College of Medicine National Taiwan University Taipei Taiwan
| | - Wei-Tien Chang
- Department of Emergency Medicine National Taiwan University Hospital Taipei Taiwan.,Department of Emergency Medicine College of Medicine National Taiwan University Taipei Taiwan
| | - Min-Shan Tsai
- Department of Emergency Medicine National Taiwan University Hospital Taipei Taiwan.,Department of Emergency Medicine College of Medicine National Taiwan University Taipei Taiwan
| | - Chien-Hua Huang
- Department of Emergency Medicine National Taiwan University Hospital Taipei Taiwan.,Department of Emergency Medicine College of Medicine National Taiwan University Taipei Taiwan
| | - Wen-Jone Chen
- Department of Emergency Medicine National Taiwan University Hospital Taipei Taiwan.,Department of Emergency Medicine College of Medicine National Taiwan University Taipei Taiwan.,Division of Cardiology Department of Internal Medicine National Taiwan University Hospital and National Taiwan University College of Medicine Taipei Taiwan
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12
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Espinoza A, Kerans V, Bugge JF, Skulstad H, Halvorsen PS. Left Ventricular Function During Epinephrine Stimulation and Hypothermia: Effects at Spontaneous and Paced Heart Rates in a Porcine Model. Ther Hypothermia Temp Manag 2020; 11:35-44. [PMID: 31916922 DOI: 10.1089/ther.2019.0035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Postcardiac arrest patients treated with hypothermia, frequently require vasopressors and inotropic medication. The aim of this experimental study was to investigate the effect of epinephrine on left ventricular (LV) function during hypothermia. In an open-chest porcine model, seven animals were equipped with LV micromanometer and epicardial ultrasound transducers to provide LV pressure, Tau, and wall thickness and thickening velocities in systole (S') and early diastole (e'). Arterial, central venous, and pulmonal artery pressures were recorded. Cardiac output (CO) was measured by transit-time flow probe on the ascending aorta. Hypothermia was induced using a cooling catheter through the femoral vein. Pacemaker leads were attached to the right atrium for pacing. LV volumes were obtained by two-dimensional echocardiography. Measurements were made at normothermia (38°C) and hypothermia (33°C), without and with epinephrine infusion (0.03 μg/kg/min), at spontaneous and paced heart rates (HRs) 120 and 140 beats/min. Hypothermia reduced LV stroke volume (SV). Epinephrine during hypothermia increased the SV with reduced end-systolic volumes. LV dP/dtmax and wall-thickening velocity increased. During normothermia, epinephrine increased CO mainly due to accelerated HR, but during hypothermia, the increased CO resulted from augmented SV and, to a lesser degree, elevated HR. The incomplete relaxation and shortened diastolic filling time and the following reduction in SV seen in hypothermic animals, was repealed by epinephrine. The CO remained elevated also due to a shortened systolic duration, which gave time for complete relaxation during higher HRs. Epinephrine infusion improved systolic and diastolic function during hypothermia, and thereby reversed the effects induced by hypothermia considerably. Epinephrine augmented CO at hypothermia through increases in both SV and HR, in contrast to a mainly HR-dependent effect during normothermia. Systolic duration was shortened, which gave sufficient diastolic duration for complete relaxation. This allowed diastolic filling and maintained CO at elevated HRs.
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Affiliation(s)
- Andreas Espinoza
- Department of Anesthesiology, Oslo University Hospital Rikshospitalet, Oslo, Norway.,The Intervention Center, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Viesturs Kerans
- Department of Anesthesiology, Oslo University Hospital Rikshospitalet, Oslo, Norway.,The Intervention Center, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Jan F Bugge
- Department of Anesthesiology, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Helge Skulstad
- Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Cardiology, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Per Steinar Halvorsen
- The Intervention Center, Oslo University Hospital Rikshospitalet, Oslo, Norway.,Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
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13
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Whitson BA, Essandoh M. Commentary: The personalized medicine of cardiothoracic surgery: Delving into subpopulations identifies the right therapy for the right patients. J Thorac Cardiovasc Surg 2019; 159:2310-2311. [PMID: 31604639 DOI: 10.1016/j.jtcvs.2019.07.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 07/25/2019] [Indexed: 10/26/2022]
Affiliation(s)
- Bryan A Whitson
- Division of Cardiac Surgery, Department of Surgery, Ohio State University Medical Center, Columbus, Ohio.
| | - Michael Essandoh
- Division of Cardiothoracic and Vascular Anesthesia, Department of Anesthesiology, Ohio State University Medical Center, Columbus, Ohio
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14
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Rungatscher A, Luciani GB, Linardi D, Milani E, Gottin L, Walpoth B, Faggian G. Temperature Variation After Rewarming from Deep Hypothermic Circulatory Arrest Is Associated with Survival and Neurologic Outcome. Ther Hypothermia Temp Manag 2017; 7:101-106. [PMID: 28437236 DOI: 10.1089/ther.2016.0037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Therapeutic hypothermia is recommended by international guidelines after cardio-circulatory arrest. However, the effects of different temperatures during the first 24 hours after deep hypothermic circulatory arrest (DHCA) for aortic arch surgery on survival and neurologic outcome are undefined. We hypothesize that temperature variation after aortic arch surgery is associated with survival and neurologic outcome. In the period 2010-2014, a total of 210 consecutive patients undergoing aortic arch surgery with DHCA were included. They were retrospectively divided into three groups by median nasopharyngeal temperature within 24 hours after rewarming: hypothermia (<36°C; n = 65), normothermia (36-37°C; n = 110), and hyperthermia (>37°C; n = 35). Multivariate stepwise logistic and linear regressions were performed to determine whether different temperature independently predicted 30-day mortality, stroke incidence, and neurologic outcome assessed by cerebral performance category (CPC) at hospital discharge. Compared with normothermia, hyperthermia was independently associated with a higher risk of 30-day mortality (28.6% vs. 10.9%; odds ratio [OR] 2.8; 95% confidence interval [CI], 1.1-8.6; p = 0.005), stroke incidence (64.3% vs. 9.1%; OR 9.1; 95% CI, 2.7-23.0; p = 0.001), and poor neurologic outcome (CPC 3-5) (68.8% vs. 39.6%; OR 4.8; 95% CI, 1.4-8.7; p = 0.01). No significant differences were demonstrated between hypothermia and normothermia. Postoperative hypothermia is not associated with a better outcome after aortic arch surgery with DHCA. However, postoperative hyperthermia (>37°C) is associated with high stroke incidence, poor neurologic outcome, and increased 30-day mortality. Target temperature management in the first 24 hours after surgery should be evaluated in prospective randomized trials.
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Affiliation(s)
- Alessio Rungatscher
- 1 Division of Cardiac Surgery, Department of Surgery, University of Verona , Verona, Italy
| | | | - Daniele Linardi
- 1 Division of Cardiac Surgery, Department of Surgery, University of Verona , Verona, Italy
| | - Elisabetta Milani
- 1 Division of Cardiac Surgery, Department of Surgery, University of Verona , Verona, Italy
| | - Leonardo Gottin
- 1 Division of Cardiac Surgery, Department of Surgery, University of Verona , Verona, Italy
| | - Beat Walpoth
- 2 Division of Cardiovascular Surgery, Department of Surgery, University of Geneva , Geneva, Switzerland
| | - Giuseppe Faggian
- 1 Division of Cardiac Surgery, Department of Surgery, University of Verona , Verona, Italy
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15
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Dietrichs ES, Sager G, Tveita T. Altered pharmacological effects of adrenergic agonists during hypothermia. Scand J Trauma Resusc Emerg Med 2016; 24:143. [PMID: 27919274 PMCID: PMC5139099 DOI: 10.1186/s13049-016-0339-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 11/29/2016] [Indexed: 01/02/2023] Open
Abstract
Rewarming from accidental hypothermia is often complicated by hypothermia-induced cardiac dysfunction, calling for immediate pharmacologic intervention. Studies show that although cardiac pharmacologic support is applied when rewarming these patients, a lack of updated treatment recommendations exist. Mainly due to lack of clinical and experimental data, neither of the international guidelines includes information about pharmacologic cardiac support at temperatures below 30 °C. However, core temperature of accidental hypothermia patients is often reduced below 30 °C. Few human studies exploring effects of adrenergic drugs during hypothermia have been published, and therefore prevailing information is collected from pre-clinical studies. The most prominent finding in these studies is an apparent depressive effect of adrenaline on cardiac function when used in doses which elevate cardiac output during normothermia. Also noradrenaline and isoprenaline largely lacked positive cardiac effects during hypothermia, while dopamine is a more promising drug for supporting cardiac function during rewarming. Data and information from these studies are in support of the prevailing notion; not to use adrenergic drugs at core temperatures below 30 °C.
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Affiliation(s)
- Erik Sveberg Dietrichs
- Anesthesia and Critical Care Research Group, Department of Clinical Medicine, UiT, The Arctic University of Norway, 9037, Tromsø, Norway. .,Department of Research and Education, Norwegian Air Ambulance Foundation, 1441, Drøbak, Norway.
| | - Georg Sager
- Experimental and Clinical Pharmacology, Department of medical biology, UiT, The Arctic University of Norway, 9037, Tromsø, Norway
| | - Torkjel Tveita
- Anesthesia and Critical Care Research Group, Department of Clinical Medicine, UiT, The Arctic University of Norway, 9037, Tromsø, Norway.,Division of Surgical Medicine and Intensive Care, University Hospital of North Norway, 9038, Tromsø, Norway
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16
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Negative inotropic effects of epinephrine in the presence of increased β-adrenoceptor sensitivity during hypothermia in a rat model. Cryobiology 2014; 70:9-16. [PMID: 25445571 DOI: 10.1016/j.cryobiol.2014.10.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 10/21/2014] [Accepted: 10/29/2014] [Indexed: 11/22/2022]
Abstract
BACKGROUND Animal studies show reduced inotropic effects of cardiac β-adrenoceptor agonists like epinephrine (Epi) during hypothermia and rewarming, while drugs targeting other pharmacological mechanisms have positive effects. This study therefore aimed to determine β-adrenoceptor sensitivity in isolated cardiomyocytes and investigate hemodynamic effects of Epi and its ability to stimulate cardiac β-adrenoceptors at different temperatures in vivo. METHODS Isolated rat myocardial cells were incubated with the radioactive β-adrenoceptor ligand [(3)H]-CGP12177 and propranolol, used as a displacer. Cells were subjected to normothermia (37 °C) or hypothermia (15 °C). After incubation, radioactivity was measured to estimate β-adrenoceptor affinity for propranolol (IC50), as a measure of β-adrenoceptor sensitivity. In separate in vivo experiments, Epi (1.25 μg/min) was administered the last 5min of experiments in normothermic (37 °C, 5h), hypothermic (4h at 15 °C) and rewarmed rats (4h at 15 °C, and subsequently rewarmed to 37 °C). Hemodynamic parameters were monitored during infusion. Hearts were thereafter freeze-clamped and tissue cAMP was measured. RESULTS In vitro measurements of IC50 for propranolol showed a hypothermia-induced increase in β-adrenoceptor sensitivity at 15 °C. Corresponding in vivo experiments at 15 °C showed decreased cardiac output and stroke volume, whereas total peripheral resistance (TPR) increased during Epi infusion, simultaneous with a 4-fold cAMP increase. CONCLUSIONS This experiment shows a hypothermia-induced in vivo and in vitro increase of cardiac β-adrenoceptor sensitivity, and simultaneous lack of inotropic effects of Epi in the presence of increased TPR. Our findings therefore indicate that hypothermia-induced reduction in inotropic effects of Epi is due to substantial elevation of TPR, rather than β-adrenoceptor dysfunction.
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17
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Dietrichs ES, Håheim B, Kondratiev T, Sieck GC, Tveita T. Cardiovascular effects of levosimendan during rewarming from hypothermia in rat. Cryobiology 2014; 69:402-10. [PMID: 25280932 DOI: 10.1016/j.cryobiol.2014.09.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 09/18/2014] [Accepted: 09/22/2014] [Indexed: 10/24/2022]
Abstract
BACKGROUND Previous research aimed at ameliorating hypothermia-induced cardiac dysfunction has shown that inotropic drugs, that stimulate the cAMP, - PKA pathway via the sarcolemmal β-receptor, have a decreased inotropic effect during hypothermia. We therefore wanted to test whether levosimendan, a calcium sensitizer and dose-dependent phosphodiesterase 3 (PDE3) inhibitor, is able to elevate stroke volume during rewarming from experimental hypothermia. METHODS A rat model designed for circulatory studies during experimental hypothermia (4h at 15°C) and rewarming was used. The following three groups were included: (1) A normothermic group receiving levosimendan, (2) a hypothermic group receiving levosimendan the last hour of stable hypothermia and during rewarming, and (3) a hypothermic placebo control group. Hemodynamic variables were monitored using a Millar conductance catheter in the left ventricle (LV), and a pressure transducer connected to the left femoral artery. In order to investigate the level of PKA stimulation by PDE3 inhibition, myocardial Ser23/24-cTnI phosphorylation was measured using Western-blot. RESULTS After rewarming, stroke volume (SV), cardiac output (CO) and preload recruitable stroke work (PRSW) were restored to within pre-hypothermic values in the levosimendan-treated animals. Compared to the placebo group after rewarming, SV, CO, PRSW, as well as levels of Ser23/24-cTnI phosphorylation, were significantly higher in the levosimendan-treated animals. CONCLUSION The present data shows that levosimendan ameliorates hypothermia-induced systolic dysfunction by elevating SV during rewarming from 15°C. Inotropic treatment during rewarming from hypothermia in the present rat model is therefore better achieved through calcium sensitizing and PDE3 inhibition, than β-receptor stimulation.
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Affiliation(s)
- Erik Sveberg Dietrichs
- Dept. of Research and Education, Norwegian Air Ambulance Foundation, 1441 Drøbak, Norway; Anesthesia and Critical Care Research Group, Institute of Clinical Medicine, UiT, The Arctic University of Norway, 9037 Tromsø, Norway.
| | - Brage Håheim
- Anesthesia and Critical Care Research Group, Institute of Clinical Medicine, UiT, The Arctic University of Norway, 9037 Tromsø, Norway; Dept. of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Rochester, MN 55905, USA.
| | - Timofei Kondratiev
- Anesthesia and Critical Care Research Group, Institute of Clinical Medicine, UiT, The Arctic University of Norway, 9037 Tromsø, Norway.
| | - Gary C Sieck
- Dept. of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Rochester, MN 55905, USA; Anesthesia and Critical Care Research Group, Institute of Clinical Medicine, UiT, The Arctic University of Norway, 9037 Tromsø, Norway.
| | - Torkjel Tveita
- Anesthesia and Critical Care Research Group, Institute of Clinical Medicine, UiT, The Arctic University of Norway, 9037 Tromsø, Norway; Division of Surgical Medicine and Intensive Care, University Hospital of North Norway, 9038 Tromsø, Norway.
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18
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Kolseth SM, Rolim NPL, Salvesen Ø, Nordhaug DO, Wahba A, Høydal MA. Levosimendan improves contractility in vivo and in vitro in a rodent model of post-myocardial infarction heart failure. Acta Physiol (Oxf) 2014; 210:865-74. [PMID: 24495280 DOI: 10.1111/apha.12248] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 11/18/2013] [Accepted: 01/30/2014] [Indexed: 01/09/2023]
Abstract
AIM As few studies have presented a thorough analysis of the effect of levosimendan (LEV) on contractility, our purpose was to investigate in vivo cardiac function as well as in vitro cardiomyocyte function and calcium (Ca(2+) ) handling following LEV treatment. METHODS Rats with post-myocardial infarction heart failure (HF) induced by ligation of the left anterior descending coronary artery and sham-operated animals were randomized to the infusion of LEV (2.4 μg kg(-1) min(-1) ) or vehicle for 40 min. Echocardiographic examination was coupled to pressure-volume sampling in the left ventricle before (B) and after (40 min) infusion. Isolated left ventricular cardiomyocytes were studied in an epifluorescence microscope. RESULTS HF LEV (n = 6), HF vehicle (n = 7), sham LEV (n = 5) and sham vehicle (n = 6) animals were included. LEV infusion compared to vehicle in HF animals reduced left ventricular end-diastolic pressure and mean arterial pressure (both P < 0.001) and improved the slope of the preload-recruitable stroke work (P < 0.05). Administrating LEV to HF cardiomyocytes in vitro improved fractional shortening and Ca(2+) sensitivity index ratio, and increased the diastolic Ca(2+) (all P < 0.01). CONCLUSION In HF animals, LEV improved the contractility by increasing the Ca(2+) sensitivity. Furthermore loading conditions were changed, and LEV could consequently change organ perfusion. An observed increase in diastolic Ca(2+) following LEV treatment and clinical implications of this should be further addressed.
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Affiliation(s)
- S. M. Kolseth
- Department of Circulation and Medical Imaging; Norwegian University of Science and Technology; Trondheim Norway
| | - N. P. L. Rolim
- Department of Circulation and Medical Imaging; Norwegian University of Science and Technology; Trondheim Norway
- K.G. Jebsen Center of Exercise in Medicine; Trondheim Norway
| | - Ø. Salvesen
- Department of Circulation and Medical Imaging; Norwegian University of Science and Technology; Trondheim Norway
| | - D. O. Nordhaug
- Department of Circulation and Medical Imaging; Norwegian University of Science and Technology; Trondheim Norway
- Department of Cardiothoracic Surgery; St Olav's University Hospital; Trondheim Norway
| | - A. Wahba
- Department of Circulation and Medical Imaging; Norwegian University of Science and Technology; Trondheim Norway
- K.G. Jebsen Center of Exercise in Medicine; Trondheim Norway
- Department of Cardiothoracic Surgery; St Olav's University Hospital; Trondheim Norway
| | - M. A. Høydal
- Department of Circulation and Medical Imaging; Norwegian University of Science and Technology; Trondheim Norway
- K.G. Jebsen Center of Exercise in Medicine; Trondheim Norway
- Norwegian Council on Cardiovascular Disease; Trondheim Norway
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Polderman KH. Of ions and temperature: the complicated interplay of temperature, fluids, and electrolytes on myocardial function. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2013; 17:1018. [PMID: 24313967 PMCID: PMC4056327 DOI: 10.1186/cc13139] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
This article discusses the potential of levosimendan to treat calcium-induced myocardial dysfunction associated with deep hypothermia. Moderate hypothermia (30 to 34°C) usually improves myocardial contractility and stabilizes heart rhythm, but deep hypothermia can cause severe myocardial dysfunction, which is mediated by intracellular calcium overload. In experimental studies, levosimendan appears effective in reversing this. Clinical studies are needed to confirm these findings and to determine whether levosimendan could also be used for accidental hypothermia and perhaps to mitigate diastolic dysfunction under moderate hypothermia.
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20
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Rungatscher A, Hallström S, Giacomazzi A, Linardi D, Milani E, Tessari M, Luciani GB, Scarabelli TM, Mazzucco A, Faggian G. Role of calcium desensitization in the treatment of myocardial dysfunction after deep hypothermic circulatory arrest. Crit Care 2013; 17:R245. [PMID: 24138817 PMCID: PMC4056352 DOI: 10.1186/cc13071] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Accepted: 09/17/2013] [Indexed: 11/10/2022] Open
Abstract
Introduction Rewarming from deep hypothermic circulatory arrest (DHCA) produces calcium desensitization by troponin I (cTnI) phosphorylation which results in myocardial dysfunction. This study investigated the acute overall hemodynamic and metabolic effects of epinephrine and levosimendan, a calcium sensitizer, on myocardial function after rewarming from DHCA. Methods Forty male Wistar rats (400 to 500 g) underwent cardiopulmonary bypass (CPB) through central cannulation and were cooled to a core temperature of 13°C to 15°C within 30 minutes. After DHCA (20 minutes) and CPB-assisted rewarming (60 minutes) rats were randomly assigned to 60 minute intravenous infusion with levosimendan (0.2 μg/kg/min; n = 15), epinephrine (0.1 μg/kg/min; n = 15) or saline (control; n = 10). Systolic and diastolic functions were evaluated at different preloads with a conductance catheter. Results The slope of left ventricular end-systolic pressure volume relationship (Ees) and preload recruitable stroke work (PRSW) recovered significantly better with levosimendan compared to epinephrine (Ees: 85 ± 9% vs 51 ± 11%, P<0.003 and PRSW: 78 ± 5% vs 48 ± 8%, P<0.005; baseline: 100%). Levosimendan but not epinephrine reduced left ventricular stiffness shown by the end-diastolic pressure-volume relationship and improved ventricular relaxation (Tau). Levosimendan preserved ATP myocardial content as well as energy charge and reduced plasma lactate concentrations. In normothermia experiments epinephrine in contrast to Levosimendan increased cTnI phosphorylation 3.5-fold. After rewarming from DHCA, cTnI phosphorylation increased 4.5-fold in the saline and epinephrine group compared to normothermia but remained unchanged with levosimendan. Conclusions Levosimendan due to prevention of calcium desensitization by cTnI phosphorylation is more effective than epinephrine for treatment of myocardial dysfunction after rewarming from DHCA.
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21
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Scaravilli V, Bonacina D, Citerio G. Rewarming: facts and myths from the systemic perspective. Crit Care 2012. [PMCID: PMC3389485 DOI: 10.1186/cc11283] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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