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Doul J, Minaříková M, Charvátová Z, Maxová H. Nitric oxide is involved in the cardioprotection of neonatal rat hearts, but not in neonatal ischemic postconditioning. Physiol Rep 2024; 12:e16147. [PMID: 39097984 PMCID: PMC11298247 DOI: 10.14814/phy2.16147] [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: 02/17/2024] [Revised: 06/29/2024] [Accepted: 07/04/2024] [Indexed: 08/06/2024] Open
Abstract
The cardioprotective effect of ischemic preconditioning (IPC) and ischemic postconditioning (IPoC) in adult hearts is mediated by nitric oxide (NO). During the early developmental period, rat hearts exhibit higher resistance to ischemia-reperfusion (I/R) injury, contain higher levels of serum nitrates, and their resistance cannot be further increased by IPC or IPoC. NOS blocker (L-NAME) lowers their high resistance. Wistar rat hearts (postnatal Days 1 and 10) were perfused according to Langendorff and exposed to 40 min of global ischemia followed by reperfusion with or without IPoC. NO and reactive oxygen species donors (DEA-NONO, SIN-1) and L-NAME were administered. Tolerance to ischemia decreased between Days 1 and 10. DEA-NONO (low concentrations) significantly increased tolerance to I/R injury on both Days 1 and 10. SIN-1 increased tolerance to I/R injury on Day 10, but not on Day 1. L-NAME significantly reduced resistance to I/R injury on Day 1, but actually increased resistance to I/R injury on Day 10. Cardioprotection by IPoC on Day 10 was not affected by either NO donors or L-NAME. It can be concluded that resistance of the neonatal heart to I/R injury is NO dependent, but unlike in adult hearts, cardioprotective interventions, such as IPoC, are most likely NO independent.
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Affiliation(s)
- Jan Doul
- Department of Pathophysiology, Second Faculty of MedicineCharles UniversityPragueCzech Republic
| | - Marcela Minaříková
- Department of Physiology, Second Faculty of MedicineCharles UniversityPragueCzech Republic
| | - Zuzana Charvátová
- Department of Pathophysiology, Second Faculty of MedicineCharles UniversityPragueCzech Republic
| | - Hana Maxová
- Department of Pathophysiology, Second Faculty of MedicineCharles UniversityPragueCzech Republic
- Center for Experimental MedicineInstitute for Clinical and Experimental MedicinePragueCzech Republic
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Reinero M, Beghetti M, Tozzi P, Segesser LKV, Samaja M, Milano G. Nitric Oxide-cGMP Pathway Modulation in an Experimental Model of Hypoxic Pulmonary Hypertension. J Cardiovasc Pharmacol Ther 2021; 26:665-676. [PMID: 33969747 PMCID: PMC8547238 DOI: 10.1177/10742484211014162] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Manipulation of nitric oxide (NO) may enable control of progression and treatment of pulmonary hypertension (PH). Several approaches may modulate the NO-cGMP pathway in vivo. Here, we investigate the effectiveness of 3 modulatory sites: (i) the amount of l-arginine; (ii) the size of plasma NO stores that stimulate soluble guanylate cyclase; (iii) the conversion of cGMP into inactive 5′-GMP, with respect to hypoxia, to test the effectiveness of the treatments with respect to hypoxia-induced PH. Male rats (n = 80; 10/group) maintained in normoxic (21% O2) or hypoxic chambers (10% O2) for 14 days were subdivided in 4 sub-groups: placebo, l-arginine (20 mg/ml), the NO donor molsidomine (15 mg/kg in drinking water), and phoshodiesterase-5 inhibitor sildenafil (1.4 mg/kg in 0.3 ml saline, i.p.). Hypoxia depressed homeostasis and increased erythropoiesis, heart and right ventricle hypertrophy, myocardial fibrosis and apoptosis inducing pulmonary remodeling. Stimulating anyone of the 3 mechanisms that enhance the NO-cGMP pathway helped rescuing the functional and morphological changes in the cardiopulmonary system leading to improvement, sometimes normalization, of the pressures. None of the treatments affected the observed parameters in normoxia. Thus, the 3 modulatory sites are essentially similar in enhancing the NO-cGMP pathway, thereby attenuating the hypoxia-related effects that lead to pulmonary hypertension.
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Affiliation(s)
- Melanie Reinero
- Department Cœur-Vaisseaux, Cardiac Surgery Center, 30635University Hospital of Lausanne, Lausanne, Switzerland
| | - Maurice Beghetti
- Unité de Cardiologie Pédiatrique, 30538University Hospital of Geneva and Centre Universitaire Romand de Cardiologie et Chirurgie Cardiaque Pédiatrique University of Geneva and Lausanne, Switzerland
| | - Piergiorgio Tozzi
- Department Cœur-Vaisseaux, Cardiac Surgery Center, 30635University Hospital of Lausanne, Lausanne, Switzerland
| | - Ludwig K von Segesser
- Department of Surgery and Anesthesiology, Cardio-Vascular Research, Lausanne, Switzerland
| | - Michele Samaja
- Department of Health Science, 9304University of Milano, Milan, Italy
| | - Giuseppina Milano
- Department Cœur-Vaisseaux, Cardiac Surgery Center, 30635University Hospital of Lausanne, Lausanne, Switzerland
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Naryzhnaya N, Khaliulin I, Lishmanov Y, Suleiman M, Tsibulnikov S, Kolar F, Maslov L. Participation of opioid receptors in the cytoprotective effect of chronic normobaric hypoxia. Physiol Res 2019; 68:245-253. [DOI: 10.33549/physiolres.933938] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
We studied the role of the delta, micro, and kappa opioid receptor (OR) subtypes in the cardioprotective effect of chronic continuous normobaric hypoxia (CNH) in the model of acuteanoxia-reoxygenation of isolated cardiomyocytes. Adaptation of rats to CNH was performed by their exposure to atmosphere containing 12% of O(2) for 21 days. Anoxia-reoxygenation of cardiomyocytes isolated from normoxiccontrol rats caused the death of 51 % of cells and lactate dehydrogenase (LDH) release. Adaptation of rats to CNH resulted in the anoxia/reoxygenation-induced cardiomyocyte death of only 38 %, and reduced the LDH release by 25 %. Pre-incubation of the cells with either the non-selective OR (opioid receptor) blocker naloxone (300 nM/l), the delta OR antagonist TIPP(psi) (30 nM/l), the selective delta(2) OR antagonist naltriben (1 nM/l) or the micro OR antagonist CTAP (100 nM/l) for 25 minutes before anoxia abolished the reduction of cell death and LDH release afforded by CNH. The antagonist of delta(1) OR BNTX (1 nM/l) or the kappa OR antagonist nor-binaltorphimine (3 nM/l) did not influence the cytoprotective effects of CNH. Taken together, the cytoprotective effect of CNH is associated with the activation of the delta(2) and micro OR localized on cardiomyocytes.
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Affiliation(s)
- N.V. Naryzhnaya
- Laboratory of Experimental Cardiology, Cardiology Research Institute, Tomsk National Research Medical Centre, Russian Academy of Sciences, Tomsk, Russia.
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Li W, Li Y, Sun R, Zhou S, Li M, Feng M, Xie Y. Dual character of flavonoids in attenuating and aggravating ischemia-reperfusion-induced myocardial injury. Exp Ther Med 2017; 14:1307-1314. [PMID: 28810591 PMCID: PMC5525640 DOI: 10.3892/etm.2017.4670] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Accepted: 03/03/2017] [Indexed: 01/21/2023] Open
Abstract
The concept that flavonoids exert cardioprotection against myocardial ischemia-reperfusion (I/R) injury has been acknowledged by a large body of evidence. However, recent studies reported cardiotoxic effects of certain flavonoids, while the underlying mechanisms have remained largely elusive. Flavonoids have been demonstrated to activate aryl hydrocarbon receptor (Ahr), which is implicated in an array of cell signaling processes. The present study examined the cardioprotective roles of quercetin (Qu) and β-naphthoflavone (β-NF) against I/R injury and explored whether the underlying mechanism proceeds via molecular signaling downstream of Ahr. An oxygen glucose deprivation/reoxygenation (OGD/R) model of I/R was established in myocardial H9c2 cells in the absence or presence of Qu or β-NF. Qu as well as β-NF reversed OGD/R-induced overproduction of reactive oxygen species by increasing the anti-oxidative capacity of the cells and protected them from lethal injury, as demonstrated by a decreased cell death rate, lactate hydrogenase leakage and caspase-3 activity as determined by flow cytometry, colorimetric assay and western blot analysis, respectively. Immunocytochemistry, co-immunoprecipitation and western blot assays collectively revealed that Qu and β-NF engendered the translocation of Ahr from the cytoplasm into the cell nucleus, where binding of Ahr with the Ahr nuclear translocator (ARNT) blocked its binding to hypoxia-inducible factor (HIF)-1α, which inhibited the cardioprotection of HIF-1α, including the induction of nitric oxide (NO) and inhibition of vascular endothelial growth factor (VEGF) production. Ahr knockdown recovered the binding of ARNT to HIF-1α and the generation of NO and VEGF. The results of the present study suggested a dual character of Qu and β-NF in the process of myocardial I/R.
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Affiliation(s)
- Wenqiang Li
- Department of Emergency, Jinan Central Hospital Affiliated to Shandong University, Jinan, Shandong 250013, P.R. China.,Intensive Care Unit, Jining First People's Hospital, Jining, Shandong 272011, P.R. China
| | - Yun Li
- Department of Emergency, Jinan Central Hospital Affiliated to Shandong University, Jinan, Shandong 250013, P.R. China
| | - Ruifang Sun
- Department of Joint Surgery, Jining First People's Hospital, Jining, Shandong 272011, P.R. China
| | - Sumei Zhou
- Intensive Care Unit, Jining First People's Hospital, Jining, Shandong 272011, P.R. China
| | - Meifeng Li
- Intensive Care Unit, Yantai Yuhuangding Hospital, Yantai, Shandong 264000, P.R. China
| | - Mingchen Feng
- Intensive Care Unit, Jining First People's Hospital, Jining, Shandong 272011, P.R. China
| | - Yingguang Xie
- Intensive Care Unit, Jining First People's Hospital, Jining, Shandong 272011, P.R. China
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Alánová P, Husková Z, Kopkan L, Sporková A, Jíchová Š, Neckář J, Imig JD, Klevstig M, Kolář F, Rami Reddy N, Falck JR, Sadowski J, Nishiyama A, Kramer HJ, Melenovský V, Červenková L, Kujal P, Vernerová Z, Červenka L. Orally active epoxyeicosatrienoic acid analog does not exhibit antihypertensive and reno- or cardioprotective actions in two-kidney, one-clip Goldblatt hypertensive rats. Vascul Pharmacol 2015; 73:45-56. [PMID: 26304700 DOI: 10.1016/j.vph.2015.08.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2014] [Revised: 07/20/2015] [Accepted: 08/20/2015] [Indexed: 12/20/2022]
Abstract
This study examined the effects of a novel orally active 14,15-epoxyeicosatrienoic acid analog (EET-A) on blood pressure (BP) and myocardial infarct size (IS) in two-kidney, one-clip (2K1C) Goldblatt hypertensive rats during sustained phase of hypertension. Between days 31 and 35 after clip placement the rats were treated with EET-A and BP was monitored by radiotelemetry; sham-operated normotensive rats were used as controls. Tissue concentrations of epoxyeicosatrienoic acids served as a marker of production of epoxygenase metabolites. The rats were subjected to acute myocardial ischemia/reperfusion (I/R) injury and IS was determined. We found that EET-A treatment did not lower BP in 2K1C rats and did not alter availability of biologically active epoxygenase metabolites in 2K1C or in sham-operated rats. The myocardial IS was significantly smaller in untreated 2K1C rats as compared with normotensive controls and EET-A reduced it in controls but not in 2K1C rats. Our findings suggest that during the phase of sustained hypertension 2K1C Goldblatt hypertensive rats exhibit increased cardiac tolerance to I/R injury as compared with normotensive controls, and that in this animal model of human renovascular hypertension short-term treatment with EET-A does not induce any antihypertensive and cardioprotective actions.
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Affiliation(s)
- Petra Alánová
- Department of Developmental Cardiology, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic.
| | - Zuzana Husková
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.
| | - Libor Kopkan
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.
| | - Alexandra Sporková
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.
| | - Šárka Jíchová
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.
| | - Jan Neckář
- Department of Developmental Cardiology, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic; Department of Pharmacology and Toxicology, Medical College of Wisconsin, WI, USA.
| | - John D Imig
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, WI, USA.
| | - Martina Klevstig
- Department of Developmental Cardiology, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic.
| | - František Kolář
- Department of Developmental Cardiology, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic.
| | - N Rami Reddy
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, USA.
| | - John R Falck
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, USA.
| | - Janusz Sadowski
- Department of Renal and Body Fluid Physiology, M. Mossakowski Medical Research Centre, Polish Academy of Science, Warsaw, Poland.
| | - Akira Nishiyama
- Department of Pharmacology, Kagawa University, Kagawa, Japan.
| | - Herbert J Kramer
- Section of Nephrology, Medical Polyclinic, Department of Medicine, University of Bonn, Bonn, Germany.
| | - Vojtěch Melenovský
- Department of Cardiology, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.
| | - Lenka Červenková
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.
| | - Petr Kujal
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic; Department of Pathology, 3rd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Zdenka Vernerová
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic; Department of Pathology, 3rd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Luděk Červenka
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic; Department of Pathophysiology, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic.
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