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Marvanova A, Kasik P, Elsnicova B, Tibenska V, Galatik F, Hornikova D, Zvolska V, Vebr P, Vodicka P, Hejnova L, Matous P, Szeiff Bacova B, Sykora M, Novotny J, Neuzil J, Kolar F, Novakova O, Zurmanova JM. Continuous short-term acclimation to moderate cold elicits cardioprotection in rats, and alters β-adrenergic signaling and immune status. Sci Rep 2023; 13:18287. [PMID: 37880253 PMCID: PMC10600221 DOI: 10.1038/s41598-023-44205-4] [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: 07/04/2023] [Accepted: 10/04/2023] [Indexed: 10/27/2023] Open
Abstract
Moderate cold acclimation (MCA) is a non-invasive intervention mitigating effects of various pathological conditions including myocardial infarction. We aim to determine the shortest cardioprotective regimen of MCA and the response of β1/2/3-adrenoceptors (β-AR), its downstream signaling, and inflammatory status, which play a role in cell-survival during myocardial infarction. Adult male Wistar rats were acclimated (9 °C, 1-3-10 days). Infarct size, echocardiography, western blotting, ELISA, mitochondrial respirometry, receptor binding assay, and quantitative immunofluorescence microscopy were carried out on left ventricular myocardium and brown adipose tissue (BAT). MultiPlex analysis of cytokines and chemokines in serum was accomplished. We found that short-term MCA reduced myocardial infarction, improved resistance of mitochondria to Ca2+-overload, and downregulated β1-ARs. The β2-ARs/protein kinase B/Akt were attenuated while β3-ARs translocated on the T-tubular system suggesting its activation. Protein kinase G (PKG) translocated to sarcoplasmic reticulum and phosphorylation of AMPKThr172 increased after 10 days. Principal component analysis revealed a significant shift in cytokine/chemokine serum levels on day 10 of acclimation, which corresponds to maturation of BAT. In conclusion, short-term MCA increases heart resilience to ischemia without any negative side effects such as hypertension or hypertrophy. Cold-elicited cardioprotection is accompanied by β1/2-AR desensitization, activation of the β3-AR/PKG/AMPK pathways, and an immunomodulatory effect.
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Affiliation(s)
- Aneta Marvanova
- Faculty of Science, Department of Physiology, Charles University, Vinicna 7, 128 00, Prague 2, Czech Republic
| | - Petr Kasik
- Faculty of Science, Department of Physiology, Charles University, Vinicna 7, 128 00, Prague 2, Czech Republic
| | - Barbara Elsnicova
- Faculty of Science, Department of Physiology, Charles University, Vinicna 7, 128 00, Prague 2, Czech Republic
| | - Veronika Tibenska
- Faculty of Science, Department of Physiology, Charles University, Vinicna 7, 128 00, Prague 2, Czech Republic
| | - František Galatik
- Faculty of Science, Department of Physiology, Charles University, Vinicna 7, 128 00, Prague 2, Czech Republic
| | - Daniela Hornikova
- Faculty of Science, Department of Physiology, Charles University, Vinicna 7, 128 00, Prague 2, Czech Republic
| | - Veronika Zvolska
- Faculty of Science, Department of Physiology, Charles University, Vinicna 7, 128 00, Prague 2, Czech Republic
| | - Pavel Vebr
- Faculty of Science, Department of Physiology, Charles University, Vinicna 7, 128 00, Prague 2, Czech Republic
| | - Petr Vodicka
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Libechov, Czech Republic
| | - Lucie Hejnova
- Faculty of Science, Department of Physiology, Charles University, Vinicna 7, 128 00, Prague 2, Czech Republic
| | - Petr Matous
- First Faculty of Medicine, Center for Advanced Preclinical Imaging (CAPI), Charles University, Prague, Czech Republic
| | - Barbara Szeiff Bacova
- Centre of Experimental Medicine, Institute for Heart Research, Slovak Academy of Sciences, Bratislava, Slovak Republic
| | - Matus Sykora
- Centre of Experimental Medicine, Institute for Heart Research, Slovak Academy of Sciences, Bratislava, Slovak Republic
| | - Jiri Novotny
- Faculty of Science, Department of Physiology, Charles University, Vinicna 7, 128 00, Prague 2, Czech Republic
| | - Jiri Neuzil
- Faculty of Science, Department of Physiology, Charles University, Vinicna 7, 128 00, Prague 2, Czech Republic
- Institute of Biotechnology, Czech Academy of Sciences, Prague-West, Czech Republic
- School of Pharmacy and Medical Science, Griffith University, Southport, QLD, Australia
| | - Frantisek Kolar
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Olga Novakova
- Faculty of Science, Department of Physiology, Charles University, Vinicna 7, 128 00, Prague 2, Czech Republic
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Jitka M Zurmanova
- Faculty of Science, Department of Physiology, Charles University, Vinicna 7, 128 00, Prague 2, Czech Republic.
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2
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Felipe Souza E Silva L, Siena Dos Santos A, Mayumi Yuzawa J, Luiz de Barros Torresi J, Ziroldo A, Rosado Rosenstock T. SIRTUINS MODULATORS COUNTERACT MITOCHONDRIAL DYSFUNCTION IN CELLULAR MODELS OF HYPOXIA: RELEVANCE TO SCHIZOPHRENIA. Neuroscience 2023:S0306-4522(23)00200-2. [PMID: 37169164 DOI: 10.1016/j.neuroscience.2023.04.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 04/16/2023] [Accepted: 04/27/2023] [Indexed: 05/13/2023]
Abstract
Schizophrenia (SZ) is a neurodevelopmental-associated disorder strongly related to environmental factors, such as hypoxia. Because there is no cure for SZ or any pharmacological approach that could revert hypoxia-induced cellular damages, we evaluated whether modulators of sirtuins could abrogate hypoxia-induced mitochondrial deregulation as a neuroprotective strategy. Firstly, astrocytes from control (Wistar) and Spontaneously Hypertensive Rats (SHR), a model of both SZ and neonatal hypoxia, were submitted to chemical hypoxia. Then, cells were exposed to different concentrations of Nicotinamide (NAM), Resveratrol (Resv), and Sirtinol (Sir) for 48hrs. Our data indicate that sirtuins modulation reduces cell death increasing the acetylation of histone 3. This outcome is related to the rescue of loss of mitochondrial membrane potential, changes in mitochondrial calcium buffering capacity, decreased O2-• levels and increased expression of metabolic regulators (Nrf-1 and Nfe2l2) and mitochondrial content. Such findings are relevant not only for hypoxia-associated conditions, named pre-eclampsia but also for SZ since prenatal hypoxia is a relevant environmental factor related to this burdensome neuropsychiatric disorder.
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Affiliation(s)
- Luiz Felipe Souza E Silva
- Department of Pharmacology, Institute of Biomedical Science, University of São Paulo, São Paulo, Brazil
| | - Amanda Siena Dos Santos
- Department of Pharmacology, Institute of Biomedical Science, University of São Paulo, São Paulo, Brazil
| | - Jessica Mayumi Yuzawa
- Department of Physiological Science, Santa Casa de São Paulo School of Medical Science, São Paulo, Brazil
| | | | - Alan Ziroldo
- Department of Physiological Science, Santa Casa de São Paulo School of Medical Science, São Paulo, Brazil
| | - Tatiana Rosado Rosenstock
- Department of Pharmacology, Institute of Biomedical Science, University of São Paulo, São Paulo, Brazil; Dept. of Bioscience, In-vitro Neuroscience, Sygnature Discovery, Nottingham, United Kingdom.
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3
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Desmin Knock-Out Cardiomyopathy: A Heart on the Verge of Metabolic Crisis. Int J Mol Sci 2022; 23:ijms231912020. [PMID: 36233322 PMCID: PMC9570457 DOI: 10.3390/ijms231912020] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 09/30/2022] [Accepted: 10/02/2022] [Indexed: 12/05/2022] Open
Abstract
Desmin mutations cause familial and sporadic cardiomyopathies. In addition to perturbing the contractile apparatus, both desmin deficiency and mutated desmin negatively impact mitochondria. Impaired myocardial metabolism secondary to mitochondrial defects could conceivably exacerbate cardiac contractile dysfunction. We performed metabolic myocardial phenotyping in left ventricular cardiac muscle tissue in desmin knock-out mice. Our analyses revealed decreased mitochondrial number, ultrastructural mitochondrial defects, and impaired mitochondria-related metabolic pathways including fatty acid transport, activation, and catabolism. Glucose transporter 1 and hexokinase-1 expression and hexokinase activity were increased. While mitochondrial creatine kinase expression was reduced, fetal creatine kinase expression was increased. Proteomic analysis revealed reduced expression of proteins involved in electron transport mainly of complexes I and II, oxidative phosphorylation, citrate cycle, beta-oxidation including auxiliary pathways, amino acid catabolism, and redox reactions and oxidative stress. Thus, desmin deficiency elicits a secondary cardiac mitochondriopathy with severely impaired oxidative phosphorylation and fatty and amino acid metabolism. Increased glucose utilization and fetal creatine kinase upregulation likely portray attempts to maintain myocardial energy supply. It may be prudent to avoid medications worsening mitochondrial function and other metabolic stressors. Therapeutic interventions for mitochondriopathies might also improve the metabolic condition in desmin deficient hearts.
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Ludwig-Słomczyńska AH, Rehm M. Mitochondrial genome variations, mitochondrial-nuclear compatibility, and their association with metabolic diseases. Obesity (Silver Spring) 2022; 30:1156-1169. [PMID: 35491673 DOI: 10.1002/oby.23424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 02/15/2022] [Accepted: 02/21/2022] [Indexed: 11/10/2022]
Abstract
Two genomes regulate the energy metabolism of eukaryotic cells: the nuclear genome, which codes for most cellular proteins, and the mitochondrial genome, which, together with the nuclear genome, coregulates cellular bioenergetics. Therefore, mitochondrial genome variations can affect, directly or indirectly, all energy-dependent cellular processes and shape the metabolic state of the organism. This review provides a current and up-to-date overview on how codependent these two genomes are, how they appear to have coevolved, and how variations within the mitochondrial genome might be associated with the manifestation of metabolic diseases. This review summarizes and structures results obtained from epidemiological studies that identified links between mitochondrial haplogroups and individual risks for developing obesity and diabetes. This is complemented by findings on the compatibility of mitochondrial and nuclear genomes and cellular bioenergetic fitness, which have been acquired from well-controlled studies in conplastic animal models. These elucidate, more mechanistically, how single-nucleotide variants can influence cellular metabolism and physiology. Overall, it seems that certain mitochondrial genome variations negatively affect mitochondrial-nuclear compatibility and are statistically linked with the onset of metabolic diseases, whereas, for others, greater uncertainty exists, and additional research into this exciting field is required.
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Affiliation(s)
| | - Markus Rehm
- Institute of Cell Biology and Immunology, University of Stuttgart, Stuttgart, Germany
- Stuttgart Research Center Systems Biology, University of Stuttgart, Stuttgart, Germany
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Pravenec M, Šilhavý J, Mlejnek P, Šimáková M, Mráček T, Pecinová A, Tauchmannová K, Hütl M, Malínská H, Kazdová L, Neckář J, Kolář F, Žurmanová J, Novotný J, Houštěk J. Conplastic strains for identification of retrograde effects of mitochondrial dna variation on cardiometabolic traits in the spontaneously hypertensive rat. Physiol Res 2021; 70:S471-S484. [DOI: 10.33549/physiolres.934740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Mitochondrial retrograde signaling is a pathway of communication from mitochondria to the nucleus. Recently, natural mitochondrial genome (mtDNA) polymorphisms (haplogroups) received increasing attention in the pathophysiology of human common diseases. However, retrograde effects of mtDNA variants on such traits are difficult to study in humans. The conplastic strains represent key animal models to elucidate regulatory roles of mtDNA haplogroups on defined nuclear genome background. To analyze the relationship between mtDNA variants and cardiometabolic traits, we derived a set of rat conplastic strains (SHR-mtBN, SHR-mtF344 and SHR-mtLEW), harboring all major mtDNA haplotypes present in common inbred strains on the nuclear background of the spontaneously hypertensive rat (SHR). The BN, F344 and LEW mtDNA differ from the SHR in multiple amino acid substitutions in protein coding genes and also in variants of tRNA and rRNA genes. Different mtDNA haplotypes were found to predispose to various sets of cardiometabolic phenotypes which provided evidence for significant retrograde effects of mtDNA in the SHR. In the future, these animals could be used to decipher individual biochemical components involved in the retrograde signaling.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - J Houštěk
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 14220 Prague, Czech Republic. ,
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6
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Neckář J, Alánová P, Olejníčková V, Papoušek F, Hejnová L, Šilhavý J, Behuliak M, Bencze M, Hrdlička J, Vecka M, Jarkovská D, Švíglerová J, Mistrová E, Štengl M, Novotný J, Ošťádal B, Pravenec M, Kolář F. Excess ischemic tachyarrhythmias trigger protection against myocardial infarction in hypertensive rats. Clin Sci (Lond) 2021; 135:2143-2163. [PMID: 34486670 DOI: 10.1042/cs20210648] [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: 06/22/2021] [Revised: 08/17/2021] [Accepted: 09/03/2021] [Indexed: 11/17/2022]
Abstract
Increased level of C-reactive protein (CRP) is a risk factor for cardiovascular diseases, including myocardial infarction and hypertension. Here, we analyzed the effects of CRP overexpression on cardiac susceptibility to ischemia/reperfusion (I/R) injury in adult spontaneously hypertensive rats (SHR) expressing human CRP transgene (SHR-CRP). Using an in vivo model of coronary artery occlusion, we found that transgenic expression of CRP predisposed SHR-CRP to repeated and prolonged ventricular tachyarrhythmias. Excessive ischemic arrhythmias in SHR-CRP led to a significant reduction in infarct size (IS) compared with SHR. The proarrhythmic phenotype in SHR-CRP was associated with altered heart and plasma eicosanoids, myocardial composition of fatty acids (FAs) in phospholipids, and autonomic nervous system imbalance before ischemia. To explain unexpected IS-limiting effect in SHR-CRP, we performed metabolomic analysis of plasma before and after ischemia. We also determined cardiac ischemic tolerance in hearts subjected to remote ischemic perconditioning (RIPer) and in hearts ex vivo. Acute ischemia in SHR-CRP markedly increased plasma levels of multiple potent cardioprotective molecules that could reduce IS at reperfusion. RIPer provided IS-limiting effect in SHR that was comparable with myocardial infarction observed in naïve SHR-CRP. In hearts ex vivo, IS did not differ between the strains, suggesting that extra-cardiac factors play a crucial role in protection. Our study shows that transgenic expression of human CRP predisposes SHR-CRP to excess ischemic ventricular tachyarrhythmias associated with a drop of pump function that triggers myocardial salvage against lethal I/R injury likely mediated by protective substances released to blood from hypoxic organs and tissue at reperfusion.
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Affiliation(s)
- Jan Neckář
- Laboratory of Developmental Cardiology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
- Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Petra Alánová
- Laboratory of Developmental Cardiology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Veronika Olejníčková
- Laboratory of Developmental Cardiology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - František Papoušek
- Laboratory of Developmental Cardiology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Lucie Hejnová
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Jan Šilhavý
- Laboratory of Genetics of Model Diseases, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Michal Behuliak
- Laboratory of Experimental Hypertension, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Michal Bencze
- Laboratory of Experimental Hypertension, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Jaroslav Hrdlička
- Laboratory of Developmental Cardiology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Marek Vecka
- 4th Department of Medicine, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Dagmar Jarkovská
- Biomedical Centre, Faculty of Medicine in Pilsen, Charles University, Prague, Czech Republic
| | - Jitka Švíglerová
- Biomedical Centre, Faculty of Medicine in Pilsen, Charles University, Prague, Czech Republic
| | - Eliška Mistrová
- Biomedical Centre, Faculty of Medicine in Pilsen, Charles University, Prague, Czech Republic
| | - Milan Štengl
- Biomedical Centre, Faculty of Medicine in Pilsen, Charles University, Prague, Czech Republic
| | - Jiří Novotný
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Bohuslav Ošťádal
- Laboratory of Developmental Cardiology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Michal Pravenec
- Laboratory of Genetics of Model Diseases, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - František Kolář
- Laboratory of Developmental Cardiology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
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7
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Tibenska V, Marvanova A, Elsnicova B, Hejnova L, Vebr P, Novotný J, Kolar F, Novakova O, M Zurmanova J. The cardioprotective effect persisting during recovery from cold acclimation is mediated by the β 2-adrenoceptor pathway and Akt activation. J Appl Physiol (1985) 2021; 130:746-755. [PMID: 33332989 DOI: 10.1152/japplphysiol.00756.2020] [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: 11/22/2022] Open
Abstract
The infarct size-limiting effect elicited by cold acclimation (CA) is accompanied by increased mitochondrial resistance and unaltered β1-adrenergic receptor (AR) signaling persisting for 2 wk at room temperature. As the mechanism of CA-elicited cardioprotection is not fully understood, we examined the role of the salvage β2-AR/Gi/Akt pathway. Male Wistar rats were exposed to CA (8°C, 5 wk), whereas the recovery group (CAR) was kept at 24°C for additional 2 wk. We show that the total number of myocardial β-ARs in the left ventricular myocardium did not change after CA but decreased after CAR. We confirmed the infarct size-limiting effect in both CA and CAR groups. Acute administration of β2-AR inhibitor ICI-118551 abolished the protective effect in the CAR group but had no effect in the control and CA groups. The inhibitory Giα1/2 and Giα3 proteins increased in the membrane fraction of the CAR group, and the phospho-Akt (Ser473)-to-Akt ratio also increased. Expression, phosphorylation, and mitochondrial location of the Akt target glycogen synthase kinase (GSK-3β) were affected neither by CA nor by CAR. However, GSK-3β translocated from the Z-disk to the H-zone after CA, and acquired its original location after CAR. Our data indicate that the cardioprotection observed after CAR is mediated by the β2-AR/Gi pathway and Akt activation. Further studies are needed to unravel downstream targets of the central regulators of the CA process and the downstream targets of the Akt protein after CAR.NEW & NOTEWORTHY Cardioprotective effect of cold acclimation and that persisting for 2 wk after recovery engage in different mechanisms. The β2-adrenoceptor/Gi pathway and Akt are involved only in the mechanism of infarct size-limiting effect occurring during the recovery phase. GSK-3β translocated from the Z-line to the H-zone of sarcomeres by cold acclimation returns back to the original position after the recovery phase. The results provide new insights potentially useful for the development of cardiac therapies.
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Affiliation(s)
- Veronika Tibenska
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Aneta Marvanova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Barbara Elsnicova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Lucie Hejnova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Pavel Vebr
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Jiri Novotný
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Frantisek Kolar
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Olga Novakova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic.,Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Jitka M Zurmanova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
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8
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Perrino C, Ferdinandy P, Bøtker HE, Brundel BJJM, Collins P, Davidson SM, den Ruijter HM, Engel FB, Gerdts E, Girao H, Gyöngyösi M, Hausenloy DJ, Lecour S, Madonna R, Marber M, Murphy E, Pesce M, Regitz-Zagrosek V, Sluijter JPG, Steffens S, Gollmann-Tepeköylü C, Van Laake LW, Van Linthout S, Schulz R, Ytrehus K. Improving translational research in sex-specific effects of comorbidities and risk factors in ischaemic heart disease and cardioprotection: position paper and recommendations of the ESC Working Group on Cellular Biology of the Heart. Cardiovasc Res 2020; 117:367-385. [PMID: 32484892 DOI: 10.1093/cvr/cvaa155] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 03/29/2020] [Accepted: 05/27/2020] [Indexed: 12/17/2022] Open
Abstract
Ischaemic heart disease (IHD) is a complex disorder and a leading cause of death and morbidity in both men and women. Sex, however, affects several aspects of IHD, including pathophysiology, incidence, clinical presentation, diagnosis as well as treatment and outcome. Several diseases or risk factors frequently associated with IHD can modify cellular signalling cascades, thus affecting ischaemia/reperfusion injury as well as responses to cardioprotective interventions. Importantly, the prevalence and impact of risk factors and several comorbidities differ between males and females, and their effects on IHD development and prognosis might differ according to sex. The cellular and molecular mechanisms underlying these differences are still poorly understood, and their identification might have important translational implications in the prediction or prevention of risk of IHD in men and women. Despite this, most experimental studies on IHD are still undertaken in animal models in the absence of risk factors and comorbidities, and assessment of potential sex-specific differences are largely missing. This ESC WG Position Paper will discuss: (i) the importance of sex as a biological variable in cardiovascular research, (ii) major biological mechanisms underlying sex-related differences relevant to IHD risk factors and comorbidities, (iii) prospects and pitfalls of preclinical models to investigate these associations, and finally (iv) will provide recommendations to guide future research. Although gender differences also affect IHD risk in the clinical setting, they will not be discussed in detail here.
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Affiliation(s)
- Cinzia Perrino
- Department of Advanced Biomedical Sciences, Federico II University, Via Pansini 5, 80131 Naples, Italy
| | - Péter Ferdinandy
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Nagyvárad tér 4, 1089 Budapest, Hungary.,Pharmahungary Group, Hajnoczy str. 6., H-6722 Szeged, Hungary
| | - Hans E Bøtker
- Department of Cardiology, Aarhus University Hospital, Palle Juul-Jensens Blvd. 161, 8200 Aarhus, Denmark
| | - Bianca J J M Brundel
- Department of Physiology, Amsterdam UMC, Vrije Universiteit, Amsterdam Cardiovascular Sciences, De Boelelaan 1117, Amsterdam, 1108 HV, the Netherlands
| | - Peter Collins
- Imperial College, Faculty of Medicine, National Heart & Lung Institute, South Kensington Campus, London SW7 2AZ, UK.,Royal Brompton Hospital, Sydney St, Chelsea, London SW3 6NP, UK
| | - Sean M Davidson
- The Hatter Cardiovascular Institute, University College London, 67 Chenies Mews, WC1E 6HX London, UK
| | - Hester M den Ruijter
- Experimental Cardiology Laboratory, Department of Cardiology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX Utrecht, the Netherlands
| | - Felix B Engel
- Experimental Renal and Cardiovascular Research, Department of Nephropathology, Institute of Pathology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Muscle Research Center Erlangen (MURCE), Schwabachanlage 12, 91054 Erlangen, Germany
| | - Eva Gerdts
- Department for Clinical Science, University of Bergen, PO Box 7804, 5020 Bergen, Norway
| | - Henrique Girao
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, Azinhaga Santa Comba, Celas, 3000-548 Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, and Clinical Academic Centre of Coimbra (CACC), 3000-548 Coimbra, Portugal
| | - Mariann Gyöngyösi
- Department of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria
| | - Derek J Hausenloy
- Cardiovascular & Metabolic Disorders Program, Duke-National University of Singapore Medical School, 8 College Road, 169857, Singapore.,National Heart Research Institute Singapore, National Heart Centre Singapore, 5 Hospital Drive, 169609, Singapore.,Yong Loo Lin School of Medicine, National University Singapore, 1E Kent Ridge Road, 119228, Singapore.,The Hatter Cardiovascular Institute, University College London, 67 Chenies Mews, London WC1E 6HX, UK.,Cardiovascular Research Center, College of Medical and Health Sciences, Asia University, 500, Lioufeng Rd., Wufeng, Taichung 41354, Taiwan
| | - Sandrine Lecour
- Hatter Institute for Cardiovascular Research in Africa, Faculty of Health Sciences, Chris Barnard Building, University of Cape Town, Private Bag X3 7935 Observatory, Cape Town, South Africa
| | - Rosalinda Madonna
- Institute of Cardiology, University of Pisa, Lungarno Antonio Pacinotti 43, 56126 Pisa, Italy.,Department of Internal Medicine, University of Texas Medical School in Houston, 6410 Fannin St #1014, Houston, TX 77030, USA
| | - Michael Marber
- King's College London BHF Centre, The Rayne Institute, St Thomas' Hospital, Westminster Bridge Road, London SE1 7EH, UK
| | - Elizabeth Murphy
- Laboratory of Cardiac Physiology, Cardiovascular Branch, NHLBI, NIH, 10 Center Drive, Bethesda, MD 20892, USA
| | - Maurizio Pesce
- Unità di Ingegneria Tissutale Cardiovascolare, Centro Cardiologico Monzino, IRCCS Via Parea, 4, I-20138 Milan, Italy
| | - Vera Regitz-Zagrosek
- Berlin Institute of Gender in Medicine, Center for Cardiovascular Research, DZHK, partner site Berlin, Geschäftsstelle Potsdamer Str. 58, 10785 Berlin, Germany.,University of Zürich, Rämistrasse 71, 8006 Zürich, Germany
| | - Joost P G Sluijter
- Experimental Cardiology Laboratory, Department of Cardiology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 8, 3584 CS Utrecht, the Netherlands.,Circulatory Health Laboratory, Regenerative Medicine Center, University Medical Center Utrecht, Utrecht University, Heidelberglaan 8, 3584 CS Utrecht, the Netherlands
| | - Sabine Steffens
- Institute for Cardiovascular Prevention and German Centre for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Pettenkoferstr. 9, Ludwig-Maximilians-University, 80336 Munich, Germany
| | - Can Gollmann-Tepeköylü
- Department of Cardiac Surgery, Medical University of Innsbruck, Anichstr.35, A - 6020 Innsbruck, Austria
| | - Linda W Van Laake
- Cardiology and UMC Utrecht Regenerative Medicine Center, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, the Netherlands
| | - Sophie Van Linthout
- Berlin Institute of Health Center for Regenerative Therapies (BCRT), Charité, University Medicine Berlin, 10178 Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité, University Medicine Berlin, 10178 Berlin, Germany.,German Centre for Cardiovascular Research (DZHK), partner site Berlin, Berlin, Germany
| | - Rainer Schulz
- Institute of Physiology, Justus-Liebig University Giessen, Ludwigstraße 23, 35390 Giessen, Germany
| | - Kirsti Ytrehus
- Department of Medical Biology, UiT The Arctic University of Norway, Hansine Hansens veg 18, 9037 Tromsø, Norway
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9
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Tibenska V, Benesova A, Vebr P, Liptakova A, Hejnová L, Elsnicová B, Drahota Z, Hornikova D, Galatík F, Kolar D, Vybiral S, Alánová P, Novotný J, Kolar F, Novakova O, Zurmanova JM. Gradual cold acclimation induces cardioprotection without affecting β-adrenergic receptor-mediated adenylyl cyclase signaling. J Appl Physiol (1985) 2020; 128:1023-1032. [DOI: 10.1152/japplphysiol.00511.2019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Novel strategies are needed that can stimulate endogenous signaling pathways to protect the heart from myocardial infarction. The present study tested the hypothesis that appropriate regimen of cold acclimation (CA) may provide a promising approach for improving myocardial resistance to ischemia/reperfusion (I/R) injury without negative side effects. We evaluated myocardial I/R injury, mitochondrial swelling, and β-adrenergic receptor (β-AR)-adenylyl cyclase-mediated signaling. Male Wistar rats were exposed to CA (8°C, 8 h/day for a week, followed by 4 wk at 8°C for 24 h/day), while the recovery group (CAR) was kept at 24°C for an additional 2 wk. The myocardial infarction induced by coronary occlusion for 20 min followed by 3-h reperfusion was reduced from 56% in controls to 30% and 23% after CA and CAR, respectively. In line, the rate of mitochondrial swelling at 200 μM Ca2+ was decreased in both groups. Acute administration of metoprolol decreased infarction in control group and did not affect the CA-elicited cardiprotection. Accordingly, neither β1-AR-Gsα-adenylyl cyclase signaling, stimulated with specific ligands, nor p-PKA/PKA ratios were affected after CA or CAR. Importantly, Western blot and immunofluorescence analyses revealed β2- and β3-AR protein enrichment in membranes in both experimental groups. We conclude that gradual cold acclimation results in a persisting increase of myocardial resistance to I/R injury without hypertension and hypertrophy. The cardioprotective phenotype is associated with unaltered adenylyl cyclase signaling and increased mitochondrial resistance to Ca2+-overload. The potential role of upregulated β2/β3-AR pathways remains to be elucidated. NEW & NOTEWORTHY We present a new model of mild gradual cold acclimation increasing tolerance to myocardial ischemia/reperfusion injury without hypertension and hypertrophy. Cardioprotective phenotype is accompanied by unaltered adenylyl cyclase signaling and increased mitochondrial resistance to Ca2+-overload. The potential role of upregulated β2/β3-adrenoreceptor activation is considered. These findings may stimulate the development of novel preventive and therapeutic strategies against myocardial ischemia/reperfusion injury.
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Affiliation(s)
- V. Tibenska
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - A. Benesova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - P. Vebr
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - A. Liptakova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - L. Hejnová
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - B. Elsnicová
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Z. Drahota
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - D. Hornikova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - F. Galatík
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - D. Kolar
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - S. Vybiral
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - P. Alánová
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - J. Novotný
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - F. Kolar
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - O. Novakova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - J. M. Zurmanova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
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10
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Prokudina E, Naryzhnaya N, Mukhomedzyanov A, Gorbunov A, Zhang Y, Jaggi A, Tsibulnikov S, Nesterov E, Lishmanov Y, Suleiman M, Oeltgen P, Maslov L. Effect of Chronic Continuous Normobaric Hypoxia on Functional State of Cardiac Mitochondria and Tolerance of Isolated Rat Heart to Ischemia and Reperfusion: Role of µ and δ2 Opioid Receptors. Physiol Res 2019; 68:909-920. [DOI: 10.33549/physiolres.933945] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Chronic continuous normobaric hypoxia (CNH) increases cardiac tolerance to ischemia/reperfusion injury in vivo and this effect is mediated via µ and δ2 opioid receptors (ORs) activation. CNH has also been shown to be cardioprotective in isolated rat heart. In this study, we hypothesize that this cardioprotective effect of CNH is mediated by activation of µ and δ2 ORs and preservation of mitochondrial function. Hearts from rats adapted to CNH (12 % oxygen) for 3 weeks were extracted, perfused in the Langendorff mode and subjected to 45 min of global ischemia and 30 min of reperfusion. Intervention groups were pretreated for 10 min with antagonists for different OR types: naloxone (300 nmol/l), the selective δ OR antagonist TIPP(ψ) (30 nmol/l), the selective δ1 OR antagonist BNTX (1 nmol/l), the selective δ2 OR antagonist naltriben (1 nmol/l), the selective peptide μ OR antagonist CTAP (100 nmol/l) and the selective κ OR antagonist nor-binaltorphimine (3 nmol/l). Creatine kinase activity in coronary effluent and cardiac contractile function were monitored to assess cardiac injury and functional impairment. Additionally, cardiac tissue was collected to measure ATP and to isolate mitochondria to measure respiration rate and calcium retention capacity. Adaptation to CNH decreased myocardial creatine kinase release during reperfusion and improved the postischemic recovery of contractile function. Additionally, CNH improved mitochondrial state 3 and uncoupled respiration rates, ADP/O, mitochondrial transmembrane potential and calcium retention capacity and myocardial ATP level during reperfusion compared to the normoxic group. These protective effects were completely abolished by naloxone, TIPP(ψ), naltriben, CTAP but not BNTX or nor-binaltorphimine. These results suggest that cardioprotection associated with adaptation to CNH is mediated by µ and δ2 opioid receptors activation and preservation of mitochondrial function.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - L.N. Maslov
- Laboratory of Experimental Cardiology, Cardiology Research Institute, Tomsk National Research Medical Centre, Russian Academy of Sciences, Tomsk, Russia.
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Two pharmacological epoxyeicosatrienoic acid-enhancing therapies are effectively antihypertensive and reduce the severity of ischemic arrhythmias in rats with angiotensin II-dependent hypertension. J Hypertens 2019; 36:1326-1341. [PMID: 29570510 DOI: 10.1097/hjh.0000000000001708] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
OBJECTIVE We examined the effects of treatment with soluble epoxide hydrolase inhibitor (sEHi) and epoxyeicosatrienoic acids (EETs) analogue (EET-A), given alone or combined, on blood pressure (BP) and ischemia/reperfusion myocardial injury in rats with angiotensin II (ANG II)-dependent hypertension. METHODS Ren-2 transgenic rats (TGR) were used as a model of ANG II-dependent hypertension and Hannover Sprague-Dawley rats served as controls. Rats were treated for 14 days with sEHi or EET-A and BP was measured by radiotelemetry. Albuminuria, cardiac hypertrophy and concentrations of ANG II and EETs were determined. Separate groups were subjected to acute myocardial ischemia/reperfusion injury and the infarct size and ventricular arrhythmias were determined. RESULTS Treatment of TGR with sEHi and EET-A, given alone or combined, decreased BP to a similar degree, reduced albuminuria and cardiac hypertrophy to similar extent; only treatment regimens including sEHi increased myocardial and renal tissue concentrations of EETs. sEHi and EET-A, given alone or combined, suppressed kidney ANG II levels in TGR. Remarkably, infarct size did not significantly differ between TGR and Hannover Sprague-Dawley rats, but the incidence of ischemia-induced ventricular fibrillations was higher in TGR. Application of sEHi and EET-A given alone and combined sEHi and EET-A treatment were all equally effective in reducing life-threatening ventricular fibrillation in TGR. CONCLUSION The findings indicate that chronic treatment with either sEHi or EET-A exerts distinct antihypertensive and antiarrhythmic actions in our ANG II-dependent model of hypertension whereas combined administration of sEHi and EET-A does not provide additive antihypertensive or cardioprotective effects.
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12
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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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13
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Hahnova K, Brabcova I, Neckar J, Weissova R, Svatonova A, Novakova O, Zurmanova J, Kalous M, Silhavy J, Pravenec M, Kolar F, Novotny J. β-Adrenergic signaling, monoamine oxidase A and antioxidant defence in the myocardium of SHR and SHR-mtBN conplastic rat strains: the effect of chronic hypoxia. J Physiol Sci 2018; 68:441-454. [PMID: 28567570 PMCID: PMC10717553 DOI: 10.1007/s12576-017-0546-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 05/23/2017] [Indexed: 01/24/2023]
Abstract
The β-adrenergic signaling pathways and antioxidant defence mechanisms play important roles in maintaining proper heart function. Here, we examined the effect of chronic normobaric hypoxia (CNH, 10% O2, 3 weeks) on myocardial β-adrenergic signaling and selected components of the antioxidant system in spontaneously hypertensive rats (SHR) and in a conplastic SHR-mtBN strain characterized by the selective replacement of the mitochondrial genome of SHR with that of the more ischemia-resistant Brown Norway strain. Our investigations revealed some intriguing differences between the two strains at the level of β-adrenergic receptors (β-ARs), activity of adenylyl cyclase (AC) and monoamine oxidase A (MAO-A), as well as distinct changes after CNH exposure. The β2-AR/β1-AR ratio was significantly higher in SHR-mtBN than in SHR, apparently due to increased expression of β2-ARs. Adaptation to hypoxia elevated β2-ARs in SHR and decreased the total number of β-ARs in SHR-mtBN. In parallel, the ability of isoprenaline to stimulate AC activity was found to be higher in SHR-mtBN than that in SHR. Interestingly, the activity of MAO-A was notably lower in SHR-mtBN than in SHR, and it was markedly elevated in both strains after exposure to hypoxia. In addition to that, CNH markedly enhanced the expression of catalase and aldehyde dehydrogenase-2 in both strains, and decreased the expression of Cu/Zn superoxide dismutase in SHR. Adaptation to CNH intensified oxidative stress to a similar extent in both strains and elevated the IL-10/TNF-α ratio in SHR-mtBN only. These data indicate that alterations in the mitochondrial genome can result in peculiar changes in myocardial β-adrenergic signaling, MAO-A activity and antioxidant defence and may, thus, affect the adaptive responses to hypoxia.
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Affiliation(s)
- Klara Hahnova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Iveta Brabcova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Jan Neckar
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Romana Weissova
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Anna Svatonova
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Olga Novakova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Jitka Zurmanova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Martin Kalous
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Jan Silhavy
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Michal Pravenec
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Frantisek Kolar
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Jiri Novotny
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic.
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14
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Nedvedova I, Kolar D, Elsnicova B, Hornikova D, Novotny J, Kalous M, Pravenec M, Neckar J, Kolar F, Zurmanova JM. Mitochondrial genome modulates myocardial Akt/Glut/HK salvage pathway in spontaneously hypertensive rats adapted to chronic hypoxia. Physiol Genomics 2018; 50:532-541. [PMID: 29676955 DOI: 10.1152/physiolgenomics.00040.2017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Recently we have shown that adaptation to continuous normobaric hypoxia (CNH) decreases myocardial ischemia/reperfusion injury in spontaneously hypertensive rats (SHR) and in a conplastic strain (SHR-mtBN). The protective effect was stronger in the latter group characterized by a selective replacement of the SHR mitochondrial genome with that of a more ischemia-resistant Brown Norway strain. The aim of the present study was to examine the possible involvement of the hypoxia inducible factor (HIF)-dependent pathway of the protein kinase B/glucose transporters/hexokinase (Akt/GLUT/HK) in this mitochondrial genome-related difference of the cardioprotective phenotype. Adult male rats were exposed for 3 wk to CNH ([Formula: see text] 0.1). The expression of dominant isoforms of Akt, GLUT, and HK in left ventricular myocardium was determined by real-time RT-PCR and Western blotting. Subcellular localization of GLUTs was assessed by quantitative immunofluorescence. Whereas adaptation to hypoxia markedly upregulated protein expression of HK2, GLUT1, and GLUT4 in both rat strains, Akt2 protein level was significantly increased in SHR-mtBN only. Interestingly, a higher content of HK2 was revealed in the sarcoplasmic reticulum-enriched fraction in SHR-mtBN after CNH. The increased activity of HK determined in the mitochondrial fraction after CNH in both strains suggested an increase of HK association with mitochondria. Interestingly, HIF1a mRNA increased and HIF2a mRNA decreased after CNH, the former effect being more pronounced in SHR-mtBN than in SHR. Pleiotropic effects of upregulated Akt2 along with HK translocation to mitochondria and mitochondria-associated membranes can potentially contribute to a stronger CNH-afforded cardioprotection in SHR-mtBN compared with progenitor SHR.
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Affiliation(s)
- Iveta Nedvedova
- Department of Physiology, Faculty of Science, Charles University , Prague , Czech Republic
| | - David Kolar
- Department of Physiology, Faculty of Science, Charles University , Prague , Czech Republic
| | - Barbara Elsnicova
- Department of Physiology, Faculty of Science, Charles University , Prague , Czech Republic
| | - Daniela Hornikova
- Department of Physiology, Faculty of Science, Charles University , Prague , Czech Republic
| | - Jiri Novotny
- Department of Physiology, Faculty of Science, Charles University , Prague , Czech Republic
| | - Martin Kalous
- Department of Physiology, Faculty of Science, Charles University , Prague , Czech Republic
| | - Michal Pravenec
- Institute of Physiology of the Czech Academy of Sciences , Prague , Czech Republic
| | - Jan Neckar
- Institute of Physiology of the Czech Academy of Sciences , Prague , Czech Republic
| | - Frantisek Kolar
- Institute of Physiology of the Czech Academy of Sciences , Prague , Czech Republic
| | - Jitka M Zurmanova
- Department of Physiology, Faculty of Science, Charles University , Prague , Czech Republic
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15
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N-acetylcysteine effects on a murine model of chronic critical limb ischemia. Biochim Biophys Acta Mol Basis Dis 2018; 1864:454-463. [DOI: 10.1016/j.bbadis.2017.10.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Revised: 10/02/2017] [Accepted: 10/23/2017] [Indexed: 01/01/2023]
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16
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Nedvedova I, Kolar D, Neckar J, Kalous M, Pravenec M, Šilhavý J, Korenkova V, Kolar F, Zurmanova JM. Cardioprotective Regimen of Adaptation to Chronic Hypoxia Diversely Alters Myocardial Gene Expression in SHR and SHR-mt BN Conplastic Rat Strains. Front Endocrinol (Lausanne) 2018; 9:809. [PMID: 30723458 PMCID: PMC6350269 DOI: 10.3389/fendo.2018.00809] [Citation(s) in RCA: 6] [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] [Received: 07/25/2018] [Accepted: 12/24/2018] [Indexed: 11/17/2022] Open
Abstract
Adaptation to continuous normobaric hypoxia (CNH) protects the heart against acute ischemia/reperfusion injury. Recently, we have demonstrated the infarct size-limiting effect of CNH also in hearts of spontaneously hypertensive rats (SHR) and in conplastic SHR-mtBN strain characterized by the selective replacement of the mitochondrial genome of SHR with that of more ischemia-resistant Brown Norway rats. Importantly, cardioprotective effect of CNH was more pronounced in SHR-mtBN than in SHR. Thus, here we aimed to identify candidate genes which may contribute to this difference between the strains. Rats were adapted to CNH (FiO2 0.1) for 3 weeks or kept at room air as normoxic controls. Screening of 45 transcripts was performed in left ventricles using Biomark Chip. Significant differences between the groups were analyzed by univariate analysis (ANOVA) and the genes contributing to the differences between the strains unmasked by CNH were identified by multivariate analyses (PCA, SOM). ANOVA with Bonferroni correction revealed that transcripts differently affected by CNH in SHR and SHR-mtBN belong predominantly to lipid metabolism and antioxidant defense. PCA divided four experimental groups into two main clusters corresponding to chronically hypoxic and normoxic groups, and differences between the strains were more pronounced after CNH. Subsequently, the following 14 candidate transcripts were selected by PCA, and confirmed by SOM analyses, that can contribute to the strain differences in cardioprotective phenotype afforded by CNH: Alkaline ceramidase 2 (Acer2), Fatty acid translocase (Cd36), Aconitase 1 (Aco1), Peroxisome proliferator activated receptor gamma (Pparg), Hemoxygenase 2 (Hmox2), Phospholipase A2 group IIA (Ppla2g2a), Dynamin-related protein (Drp), Protein kinase C epsilon (Pkce), Hexokinase 2 (Hk2), Sphingomyelin synthase 2 (Sgms2), Caspase 3 (Casp3), Mitofussin 1 (Mfn1), Phospholipase A2 group V (Pla2g5), and Catalase (Cat). Our data suggest that the stronger cardioprotective phenotype of conplastic SHR-mtBN strain afforded by CNH is associated with either preventing the drop or increasing the expression of transcripts related to energy metabolism, antioxidant response and mitochondrial dynamics.
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Affiliation(s)
- Iveta Nedvedova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czechia
| | - David Kolar
- Department of Physiology, Faculty of Science, Charles University, Prague, Czechia
| | - Jan Neckar
- Institute of Physiology, Czech Academy of Sciences, Prague, Czechia
| | - Martin Kalous
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czechia
| | - Michal Pravenec
- Institute of Physiology, Czech Academy of Sciences, Prague, Czechia
| | - Jan Šilhavý
- Institute of Physiology, Czech Academy of Sciences, Prague, Czechia
| | - Vlasta Korenkova
- Institute of Biotechnology, Czech Academy of Sciences, Prague, Czechia
| | - Frantisek Kolar
- Institute of Physiology, Czech Academy of Sciences, Prague, Czechia
| | - Jitka M. Zurmanova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czechia
- *Correspondence: Jitka M. Zurmanova
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Kohutova J, Elsnicova B, Holzerova K, Neckar J, Sebesta O, Jezkova J, Vecka M, Vebr P, Hornikova D, Szeiffova Bacova B, Egan Benova T, Hlavackova M, Tribulova N, Kolar F, Novakova O, Zurmanova JM. Anti-arrhythmic Cardiac Phenotype Elicited by Chronic Intermittent Hypoxia Is Associated With Alterations in Connexin-43 Expression, Phosphorylation, and Distribution. Front Endocrinol (Lausanne) 2018; 9:789. [PMID: 30740090 PMCID: PMC6357219 DOI: 10.3389/fendo.2018.00789] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 12/14/2018] [Indexed: 12/31/2022] Open
Abstract
Remodeling of the cellular distribution of gap junctions formed mainly by connexin-43 (Cx43) can be related to the increased incidence of cardiac arrhythmias. It has been shown that adaptation to chronic intermittent hypobaric hypoxia (IHH) attenuates the incidence and severity of ischemic and reperfusion ventricular arrhythmias and increases the proportion of anti-arrhythmic n-3 polyunsaturated fatty acids (n-3 PUFA) in heart phospholipids. Wistar rats were exposed to simulated IHH (7,000 m, 8-h/day, 35 exposures) and compared with normoxic controls (N). Cx43 expression, phosphorylation, localization and n-3 PUFA proportion were analyzed in left ventricular myocardium. Compared to N, IHH led to higher expression of total Cx43, its variant phosphorylated at Ser368 [p-Cx43(Ser368)], which maintains "end to end" communication, as well as p-Cx43(Ser364/365), which facilitates conductivity. By contrast, expression of non-phosphorylated Cx43 and p-Cx43(Ser278/289), attenuating intercellular communication, was lower in IHH than in N. IHH also resulted in increased expression of protein kinase A and protein kinase G while casein kinase 1 did not change compared to N. In IHH group, which exhibited reduced incidence of ischemic ventricular arrhythmias, Cx43 and p-Cx43(Ser368) were more abundant at "end to end" gap junctions than in N group and this difference was preserved after acute regional ischemia (10 min). We further confirmed higher n-3 PUFA proportion in heart phospholipids after adaptation to IHH, which was even further increased by ischemia. Our results suggest that adaptation to IHH alters expression, phosphorylation and distribution of Cx43 as well as cardioprotective n-3PUFA proportion suggesting that the anti-arrhythmic phenotype elicited by IHH can be at least partly related to the stabilization of the "end to end" conductivity between cardiomyocytes during brief ischemia.
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Affiliation(s)
- Jana Kohutova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czechia
| | - Barbara Elsnicova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czechia
| | - Kristyna Holzerova
- Developmental Cardiology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czechia
| | - Jan Neckar
- Developmental Cardiology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czechia
| | - Ondrej Sebesta
- Laboratory of Confocal and Fluorescence Microscopy, Faculty of Science, Charles University, Prague, Czechia
| | - Jana Jezkova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czechia
| | - Marek Vecka
- 4th Department of Internal Medicine, 1st Faculty of Medicine, Charles University, Prague, Czechia
| | - Pavel Vebr
- Department of Physiology, Faculty of Science, Charles University, Prague, Czechia
| | - Daniela Hornikova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czechia
| | - Barbara Szeiffova Bacova
- Center of Experimental Medicine of the Slovak Academy of Sciences, Institute for Heart Research, Bratislava, Slovakia
| | - Tamara Egan Benova
- Center of Experimental Medicine of the Slovak Academy of Sciences, Institute for Heart Research, Bratislava, Slovakia
| | - Marketa Hlavackova
- Developmental Cardiology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czechia
| | - Narcis Tribulova
- Center of Experimental Medicine of the Slovak Academy of Sciences, Institute for Heart Research, Bratislava, Slovakia
| | - Frantisek Kolar
- Developmental Cardiology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czechia
| | - Olga Novakova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czechia
- Developmental Cardiology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czechia
| | - Jitka M. Zurmanova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czechia
- *Correspondence: Jitka M. Zurmanova
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