1
|
Curaj A, Vanholder R, Loscalzo J, Quach K, Wu Z, Jankowski V, Jankowski J. Cardiovascular Consequences of Uremic Metabolites: an Overview of the Involved Signaling Pathways. Circ Res 2024; 134:592-613. [PMID: 38422175 DOI: 10.1161/circresaha.123.324001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
The crosstalk of the heart with distant organs such as the lung, liver, gut, and kidney has been intensively approached lately. The kidney is involved in (1) the production of systemic relevant products, such as renin, as part of the most essential vasoregulatory system of the human body, and (2) in the clearance of metabolites with systemic and organ effects. Metabolic residue accumulation during kidney dysfunction is known to determine cardiovascular pathologies such as endothelial activation/dysfunction, atherosclerosis, cardiomyocyte apoptosis, cardiac fibrosis, and vascular and valvular calcification, leading to hypertension, arrhythmias, myocardial infarction, and cardiomyopathies. However, this review offers an overview of the uremic metabolites and details their signaling pathways involved in cardiorenal syndrome and the development of heart failure. A holistic view of the metabolites, but more importantly, an exhaustive crosstalk of their known signaling pathways, is important for depicting new therapeutic strategies in the cardiovascular field.
Collapse
Affiliation(s)
- Adelina Curaj
- Institute of Molecular Cardiovascular Research, RWTH Aachen University, Germany (A.C., K.Q., Z.W., V.J., J.J.)
| | - Raymond Vanholder
- Department of Internal Medicine and Pediatrics, Nephrology Section, University Hospital, Ghent, Belgium (R.V.)
| | - Joseph Loscalzo
- Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA (J.L.)
| | - Kaiseng Quach
- Institute of Molecular Cardiovascular Research, RWTH Aachen University, Germany (A.C., K.Q., Z.W., V.J., J.J.)
| | - Zhuojun Wu
- Institute of Molecular Cardiovascular Research, RWTH Aachen University, Germany (A.C., K.Q., Z.W., V.J., J.J.)
| | - Vera Jankowski
- Institute of Molecular Cardiovascular Research, RWTH Aachen University, Germany (A.C., K.Q., Z.W., V.J., J.J.)
| | - Joachim Jankowski
- Institute of Molecular Cardiovascular Research, RWTH Aachen University, Germany (A.C., K.Q., Z.W., V.J., J.J.)
- Experimental Vascular Pathology, Cardiovascular Research Institute Maastricht, University of Maastricht, the Netherlands (J.J.)
- Aachen-Maastricht Institute for Cardiorenal Disease, RWTH Aachen University, Aachen, Germany (J.J.)
| |
Collapse
|
2
|
Yuan ZL, Mo YZ, Li DL, Xie L, Chen MH. Inhibition of ERK downregulates autophagy via mitigating mitochondrial fragmentation to protect SH-SY5Y cells from OGD/R injury. Cell Commun Signal 2023; 21:204. [PMID: 37580749 PMCID: PMC10426156 DOI: 10.1186/s12964-023-01211-3] [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: 03/03/2023] [Accepted: 07/01/2023] [Indexed: 08/16/2023] Open
Abstract
BACKGROUND Cerebral ischemia-reperfusion injury (CIRI) is the main cause leading to high mortality and neurological disability in patients with cardiac arrest/cardiopulmonary resuscitation (CA/CPR). Our previous study found that extracellular signal-regulated kinase (ERK) activation, dynamin-related protein1 (Drp1)/Mitofusin2 (Mfn2)-dependent mitochondrial dynamics imbalance, and excessive autophagy were involved in the mechanism of nerve injury after CA/CPR. However, the specific pathological signaling pathway is still unknown. This study aimed to explore the molecular function changes of ERK-Drp1/Mfn2-autophagy signaling pathway in SH-SY5Y cell oxygen-glucose deprivation/reoxygenation (OGD/R) model, to further clarify the pathophysiological mechanism of CIRI, and to provide a new strategy for cerebral protection after CIRI. METHODS SH-SY5Y cells were pretreated with drugs 24 h before OGD/R. The Drp1 and Mfn2 knockdown were adopted small interfering RNAs. The overexpression of p-Drp1S616 and Mfn2 were used recombinant plasmids. The expression levels of mitochondrial dynamics proteins (p-Drp1, Drp1, Mfn2, Mfn1 and Opa1) and autophagy markers (LC3, Beclin1 and p62) were measured with the Western blotting. The mRNA levels after transfection were determined by PCR. Cell injury and viability were evaluated with released LDH activity and CCK8 assay kits. Mitochondria morphology and autophagosome were observed under transmission electron microscopy. Mitochondrial function was detected by the mitochondrial permeability transition pore assay kit. The co-expression of p-ERK, p-Drp1 and LC3 was assessed with multiple immunofluorescences. One-way analysis of variance followed by least significance difference post hoc analysis (for equal homogeneity) or Dunnett's T3 test (for unequal homogeneity) were used for statistical tests. RESULTS ERK inhibitor-PD98059 (PD) protects SH-SY5Y cells from OGD/R-induced injury; while ERK activator-TPA had the opposite effect. Similar to autophagy inhibitor 3-MA, PD downregulated autophagy to improve cell viability; while autophagy activator-rapamycin further aggravated cell death. PD and Drp1-knockdown synergistically attenuated OGD/R-induced Drp1 activation, mPTP opening and cell injury; overexpression of Drp1S616E or ablating Mfn2 partly abolished the protective effects of PD. Multiple immunofluorescences showed that p-ERK, p-Drp1 and LC3 were co-expressed. CONCLUSION Inhibition of ERK downregulates autophagy via reducing Drp1/Mfn2-dependent mitochondrial fragmentation to antagonize mitochondrial dysfunction and promotes cell survival in the SH-SY5Y cells OGD/R model. Video Abstract.
Collapse
Affiliation(s)
- Zhang-Li Yuan
- Department of Emergency Medicine, The Second Affiliated Hospital of Guangxi Medical University, Nanning, 530007, Guangxi, People's Republic of China
| | - Yan-Zi Mo
- Intensive Care Unit, The Second Affiliated Hospital of Guangxi Medical University, 166 Daxuedong Road, Guangxi, 530007, Nanning, People's Republic of China
| | - De-Li Li
- Guangxi Medical University, 22 Shuangyong Road, Guangxi, 530021, Nanning, People's Republic of China
| | - Lu Xie
- Guangxi Medical University, 22 Shuangyong Road, Guangxi, 530021, Nanning, People's Republic of China.
| | - Meng-Hua Chen
- Intensive Care Unit, The Second Affiliated Hospital of Guangxi Medical University, 166 Daxuedong Road, Guangxi, 530007, Nanning, People's Republic of China.
| |
Collapse
|
3
|
Zhang MF, Wan SC, Chen WB, Yang DH, Liu WQ, Li BL, Aierken A, Du XM, Li YX, Wu WP, Yang XC, Wei YD, Li N, Peng S, Li XL, Li GP, Hua JL. Transcription factor Dmrt1 triggers the SPRY1-NF-κB pathway to maintain testicular immune homeostasis and male fertility. Zool Res 2023; 44:505-521. [PMID: 37070575 PMCID: PMC10236308 DOI: 10.24272/j.issn.2095-8137.2022.440] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 04/07/2023] [Indexed: 04/19/2023] Open
Abstract
Bacterial or viral infections, such as Brucella, mumps virus, herpes simplex virus, and Zika virus, destroy immune homeostasis of the testes, leading to spermatogenesis disorder and infertility. Of note, recent research shows that SARS-CoV-2 can infect male gonads and destroy Sertoli and Leydig cells, leading to male reproductive dysfunction. Due to the many side effects associated with antibiotic therapy, finding alternative treatments for inflammatory injury remains critical. Here, we found that Dmrt1 plays an important role in regulating testicular immune homeostasis. Knockdown of Dmrt1 in male mice inhibited spermatogenesis with a broad inflammatory response in seminiferous tubules and led to the loss of spermatogenic epithelial cells. Chromatin immunoprecipitation sequencing (ChIP-seq) and RNA sequencing (RNA-seq) revealed that Dmrt1 positively regulated the expression of Spry1, an inhibitory protein of the receptor tyrosine kinase (RTK) signaling pathway. Furthermore, immunoprecipitation-mass spectrometry (IP-MS) and co-immunoprecipitation (Co-IP) analysis indicated that SPRY1 binds to nuclear factor kappa B1 (NF-κB1) to prevent nuclear translocation of p65, inhibit activation of NF-κB signaling, prevent excessive inflammatory reaction in the testis, and protect the integrity of the blood-testis barrier. In view of this newly identified Dmrt1- Spry1-NF-κB axis mechanism in the regulation of testicular immune homeostasis, our study opens new avenues for the prevention and treatment of male reproductive diseases in humans and livestock.
Collapse
Affiliation(s)
- Meng-Fei Zhang
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Shi-Cheng Wan
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Wen-Bo Chen
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Dong-Hui Yang
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Wen-Qing Liu
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
- Center of Reproductive Medicine, Amsterdam Research Institute Reproduction and Development, Academic Medical Center, University of Amsterdam 1105AZ, Amsterdam, Netherlands
| | - Ba-Lun Li
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Aili Aierken
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xiao-Min Du
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yun-Xiang Li
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Wen-Ping Wu
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xin-Chun Yang
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yu-Dong Wei
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Na Li
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Sha Peng
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xue-Ling Li
- Key Laboratory for Mammalian Reproductive Biology and Biotechnology, Ministry of Education, Inner Mongolia University, Hohhot, Inner Mongolia 010021, China
| | - Guang-Peng Li
- Key Laboratory for Mammalian Reproductive Biology and Biotechnology, Ministry of Education, Inner Mongolia University, Hohhot, Inner Mongolia 010021, China
| | - Jin-Lian Hua
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
- Key Laboratory of Livestock Biology, Northwest A&F University, Yangling, Shaanxi 712100, China. E-mail:
| |
Collapse
|
4
|
Yu P, Zhang J, Ding Y, Chen D, Sun H, Yuan F, Li S, Li X, Yang P, Fu L, Yu S, Zhang J. Dexmedetomidine post-conditioning alleviates myocardial ischemia-reperfusion injury in rats by ferroptosis inhibition via SLC7A11/GPX4 axis activation. Hum Cell 2022; 35:836-848. [PMID: 35212945 DOI: 10.1007/s13577-022-00682-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 01/30/2022] [Indexed: 02/08/2023]
Abstract
The SLC7A11/GPX4 axis plays an important role in ferroptosis during cardiac ischemia/reperfusion injury (IRI). The present study was designed to evaluate the impact of dexmedetomidine (DEX) post-conditioning on cardiac IRI and to explore whether the effect was achieved by SLC7A11/GPX4 signaling pathway regulation. Rat myocardial IRI was established by occluding the left anterior descending artery for 30 min followed by 2-h reperfusion. The infarct area was detected by diphenyltetrazolium chloride (TTC) staining; the cardiac function was evaluated by echocardiography. The levels of lipid peroxide biomarkers were measured to estimate the injury caused by lipid peroxide. HE staining and Sirius staining were utilized to assess myocardial damage and fibrosis. The mitochondrial morphology was observed by electron micrography. Western blot and quantitative real-time polymerase chain reaction were employed to measure the relative molecular characteristics. Our results showed that DEX administration at the beginning of reperfusion attenuated IRI-induced myocardial injury, alleviated mitochondrial dysfunction, decreased the level of reactive oxygen species (ROS), alleviated mitochondrial dysfunction, inhibited the activation of SLC7A11/GPX4, and modulated the expression of ferroptosis-related proteins, including SLC7A11, glutathione peroxidase 4 (GPX4), ferritin heavy chain (FTH), and cyclooxygenase-2 (COX-2). Conversely, the ferroptosis activator erastin partly suppressed the DEX-mediated cardio protection. Altogether, these results reveal that DEX inhibits ferroptosis by enhancing the expression of SLC7A11 and GPX4, thereby preventing cardiac I/R injury.
Collapse
Affiliation(s)
- Peng Yu
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, China
| | - Jing Zhang
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, China
| | - Yi Ding
- Department of Anesthesiology, Affiliated Hospital of Jiangnan University, No. 1000, Hefeng Road, Wuxi, 214125, China
| | - Dandan Chen
- Department of Anesthesiology, Affiliated Hospital of Jiangnan University, No. 1000, Hefeng Road, Wuxi, 214125, China
| | - Haijian Sun
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Fenglai Yuan
- Department of Burns and Plastic Surgery, Affiliated Hospital of Jiangnan University, Wuxi, 214125, China
| | - Siyuan Li
- Grade 2017, The Second Clinical Medical College of Nanchang University, Nanchang, 330006, China
| | - Xiaozhong Li
- Department of Cardiology, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Pingping Yang
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, China
| | - Linghua Fu
- Department of Cardiology, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Shuchun Yu
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, China
| | - Jiru Zhang
- Department of Anesthesiology, Affiliated Hospital of Jiangnan University, No. 1000, Hefeng Road, Wuxi, 214125, China.
| |
Collapse
|
5
|
Zhang Q, Wang L, Yin Y, Shen J, Xie J, Yuan J. Hydrogen Sulfide Releasing Hydrogel for Alleviating Cardiac Inflammation and Protecting Against Myocardial Ischemia-Reperfusion Injury. J Mater Chem B 2022; 10:5344-5351. [DOI: 10.1039/d2tb00971d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Myocardial infarction is one of the leading causes of death worldwide. Thus, protection against myocardial ischemia-reperfusion injury is particularly important to improve the prognosis of myocardial infarction. Recently, hydrogen sulfide...
Collapse
|
6
|
Lin R, Rahtu-Korpela L, Szabo Z, Kemppi A, Skarp S, Kiviniemi AM, Lepojärvi ES, Halmetoja E, Kilpiö T, Porvari K, Pakanen L, Tolva J, Paakkanen R, Segersvärd H, Tikkanen I, Laine M, Sinisalo J, Lakkisto P, Huikuri H, Magga J, Junttila J, Kerkelä R. MiR-185-5p regulates the development of myocardial fibrosis. J Mol Cell Cardiol 2021; 165:130-140. [PMID: 34973276 DOI: 10.1016/j.yjmcc.2021.12.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 12/17/2021] [Accepted: 12/22/2021] [Indexed: 12/20/2022]
Abstract
BACKGROUND Cardiac fibrosis stiffens the ventricular wall, predisposes to cardiac arrhythmias and contributes to the development of heart failure. In the present study, our aim was to identify novel miRNAs that regulate the development of cardiac fibrosis and could serve as potential therapeutic targets for myocardial fibrosis. METHODS AND RESULTS Analysis for cardiac samples from sudden cardiac death victims with extensive myocardial fibrosis as the primary cause of death identified dysregulation of miR-185-5p. Analysis of resident cardiac cells from mice subjected to experimental cardiac fibrosis model showed induction of miR-185-5p expression specifically in cardiac fibroblasts. In vitro, augmenting miR-185-5p induced collagen production and profibrotic activation in cardiac fibroblasts, whereas inhibition of miR-185-5p attenuated collagen production. In vivo, targeting miR-185-5p in mice abolished pressure overload induced cardiac interstitial fibrosis. Mechanistically, miR-185-5p targets apelin receptor and inhibits the anti-fibrotic effects of apelin. Finally, analysis of left ventricular tissue from patients with severe cardiomyopathy showed an increase in miR-185-5p expression together with pro-fibrotic TGF-β1 and collagen I. CONCLUSIONS Our data show that miR-185-5p targets apelin receptor and promotes myocardial fibrosis.
Collapse
Affiliation(s)
- Ruizhu Lin
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Finland
| | - Lea Rahtu-Korpela
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Finland
| | - Zoltan Szabo
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Finland; Division of Cardiology, Research Unit of Internal Medicine, University of Oulu and University Hospital of Oulu, Oulu, Finland
| | - Anna Kemppi
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Finland
| | - Sini Skarp
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Finland
| | - Antti M Kiviniemi
- Division of Cardiology, Research Unit of Internal Medicine, University of Oulu and University Hospital of Oulu, Oulu, Finland
| | - E Samuli Lepojärvi
- Division of Cardiology, Research Unit of Internal Medicine, University of Oulu and University Hospital of Oulu, Oulu, Finland
| | - Eveliina Halmetoja
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Finland
| | - Teemu Kilpiö
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Finland
| | - Katja Porvari
- Department of Forensic Medicine, Research Unit of Internal Medicine, University of Oulu, Oulu, Finland
| | - Lasse Pakanen
- Department of Forensic Medicine, Research Unit of Internal Medicine, University of Oulu, Oulu, Finland; Forensic Medicine Unit, Finnish Institute for Health and Welfare, Oulu, Finland
| | - Johanna Tolva
- Transplantation laboratory, Department of Pathology, University of Helsinki, Finland
| | - Riitta Paakkanen
- Department of Cardiology, Heart and Lung Center, Helsinki University Hospital and University of Helsinki, Finland
| | - Heli Segersvärd
- Unit of Cardiovascular Research, Minerva Institute for Medical Research, Helsinki, Finland
| | - Ilkka Tikkanen
- Unit of Cardiovascular Research, Minerva Institute for Medical Research, Helsinki, Finland; Abdominal Center, Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Mika Laine
- Department of Cardiology, Heart and Lung Center, Helsinki University Hospital and University of Helsinki, Finland
| | - Juha Sinisalo
- Department of Cardiology, Heart and Lung Center, Helsinki University Hospital and University of Helsinki, Finland
| | - Päivi Lakkisto
- Unit of Cardiovascular Research, Minerva Institute for Medical Research, Helsinki, Finland; Department of Clinical Chemistry and Hematology, University of Helsinki and Helsinki University Hospital, Finland
| | - Heikki Huikuri
- Division of Cardiology, Research Unit of Internal Medicine, University of Oulu and University Hospital of Oulu, Oulu, Finland; Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Johanna Magga
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Finland; Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Juhani Junttila
- Division of Cardiology, Research Unit of Internal Medicine, University of Oulu and University Hospital of Oulu, Oulu, Finland; Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland; Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Risto Kerkelä
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Finland; Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland; Biocenter Oulu, University of Oulu, Oulu, Finland.
| |
Collapse
|
7
|
Vainio L, Taponen S, Kinnunen SM, Halmetoja E, Szabo Z, Alakoski T, Ulvila J, Junttila J, Lakkisto P, Magga J, Kerkelä R. GSK3β Serine 389 Phosphorylation Modulates Cardiomyocyte Hypertrophy and Ischemic Injury. Int J Mol Sci 2021; 22:13586. [PMID: 34948382 PMCID: PMC8707850 DOI: 10.3390/ijms222413586] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/03/2021] [Accepted: 12/15/2021] [Indexed: 11/17/2022] Open
Abstract
Prior studies show that glycogen synthase kinase 3β (GSK3β) contributes to cardiac ischemic injury and cardiac hypertrophy. GSK3β is constitutionally active and phosphorylation of GSK3β at serine 9 (S9) inactivates the kinase and promotes cellular growth. GSK3β is also phosphorylated at serine 389 (S389), but the significance of this phosphorylation in the heart is not known. We analyzed GSK3β S389 phosphorylation in diseased hearts and utilized overexpression of GSK3β carrying ser→ala mutations at S9 (S9A) and S389 (S389A) to study the biological function of constitutively active GSK3β in primary cardiomyocytes. We found that phosphorylation of GSK3β at S389 was increased in left ventricular samples from patients with dilated cardiomyopathy and ischemic cardiomyopathy, and in hearts of mice subjected to thoracic aortic constriction. Overexpression of either GSK3β S9A or S389A reduced the viability of cardiomyocytes subjected to hypoxia-reoxygenation. Overexpression of double GSK3β mutant (S9A/S389A) further reduced cardiomyocyte viability. Determination of protein synthesis showed that overexpression of GSK3β S389A or GSK3β S9A/S389A increased both basal and agonist-induced cardiomyocyte growth. Mechanistically, GSK3β S389A mutation was associated with activation of mTOR complex 1 signaling. In conclusion, our data suggest that phosphorylation of GSK3β at S389 enhances cardiomyocyte survival and protects from cardiomyocyte hypertrophy.
Collapse
Affiliation(s)
- Laura Vainio
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Oulu 90220, Finland; (L.V.); (S.T.); (S.M.K.); (E.H.); (Z.S.); (T.A.); (J.U.); (J.M.)
- Biocenter Oulu, University of Oulu, Oulu 90220, Finland;
| | - Saija Taponen
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Oulu 90220, Finland; (L.V.); (S.T.); (S.M.K.); (E.H.); (Z.S.); (T.A.); (J.U.); (J.M.)
- Biocenter Oulu, University of Oulu, Oulu 90220, Finland;
| | - Sini M. Kinnunen
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Oulu 90220, Finland; (L.V.); (S.T.); (S.M.K.); (E.H.); (Z.S.); (T.A.); (J.U.); (J.M.)
- Drug Research Program, Division of Pharmacology and Pharmacotherapy, Faculty of Pharmacy, University of Helsinki, Helsinki 00014, Finland
| | - Eveliina Halmetoja
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Oulu 90220, Finland; (L.V.); (S.T.); (S.M.K.); (E.H.); (Z.S.); (T.A.); (J.U.); (J.M.)
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu 90220, Finland
| | - Zoltan Szabo
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Oulu 90220, Finland; (L.V.); (S.T.); (S.M.K.); (E.H.); (Z.S.); (T.A.); (J.U.); (J.M.)
| | - Tarja Alakoski
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Oulu 90220, Finland; (L.V.); (S.T.); (S.M.K.); (E.H.); (Z.S.); (T.A.); (J.U.); (J.M.)
- Biocenter Oulu, University of Oulu, Oulu 90220, Finland;
| | - Johanna Ulvila
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Oulu 90220, Finland; (L.V.); (S.T.); (S.M.K.); (E.H.); (Z.S.); (T.A.); (J.U.); (J.M.)
| | - Juhani Junttila
- Biocenter Oulu, University of Oulu, Oulu 90220, Finland;
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu 90220, Finland
- Research Unit of Internal Medicine, Division of Cardiology, Oulu University Hospital and University of Oulu, Oulu 90220, Finland
| | - Päivi Lakkisto
- Unit of Cardiovascular Research, Minerva Institute for Medical Research, Helsinki 00014, Finland;
- Department of Clinical Chemistry and Hematology, University of Helsinki and Helsinki University Hospital, Helsinki 00014, Finland
| | - Johanna Magga
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Oulu 90220, Finland; (L.V.); (S.T.); (S.M.K.); (E.H.); (Z.S.); (T.A.); (J.U.); (J.M.)
- Biocenter Oulu, University of Oulu, Oulu 90220, Finland;
| | - Risto Kerkelä
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Oulu 90220, Finland; (L.V.); (S.T.); (S.M.K.); (E.H.); (Z.S.); (T.A.); (J.U.); (J.M.)
- Biocenter Oulu, University of Oulu, Oulu 90220, Finland;
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu 90220, Finland
| |
Collapse
|
8
|
Melatonin Attenuates Cardiac Ischemia-Reperfusion Injury through Modulation of IP3R-Mediated Mitochondria-ER Contact. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:1370862. [PMID: 34422206 PMCID: PMC8371645 DOI: 10.1155/2021/1370862] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 07/17/2021] [Accepted: 07/24/2021] [Indexed: 02/07/2023]
Abstract
Although the interplay between mitochondria and ER has been identified as a crucial regulator of cellular homeostasis, the pathogenic impact of alterations in mitochondria-ER contact sites (MERCS) during myocardial postischemic reperfusion (I/R) injury remains incompletely understood. Therefore, in our study, we explored the beneficial role played by melatonin in protecting cardiomyocytes against reperfusion injury via stabilizing mitochondria-ER interaction. In vitro exposure of H9C2 rat cardiomyocytes to hypoxia/reoxygenation (H/R) augmented mitochondrial ROS synthesis, suppressed both mitochondrial potential and ATP generation, and increased the mitochondrial permeability transition pore (mPTP) opening rate. Furthermore, H/R exposure upregulated the protein content of CHOP and caspase-12, two markers of ER stress, and enhanced the transcription of main MERCS tethering proteins, namely, Fis1, BAP31, Mfn2, and IP3R. Interestingly, all the above changes could be attenuated or reversed by melatonin treatment. Suggesting that melatonin-induced cardioprotection works through normalization of mitochondria-ER interaction, overexpression of IP3R abolished the protective actions offered by melatonin on mitochondria-ER fitness. These results expand our knowledge on the cardioprotective actions of melatonin during myocardial postischemic reperfusion damage and suggest that novel, more effective treatments for acute myocardial reperfusion injury might be achieved through modulation of mitochondria-ER interaction in cardiac cells.
Collapse
|
9
|
Ji H, Wu D, Kimberlee O, Li R, Qian G. Molecular Perspectives of Mitophagy in Myocardial Stress: Pathophysiology and Therapeutic Targets. Front Physiol 2021; 12:700585. [PMID: 34276422 PMCID: PMC8279814 DOI: 10.3389/fphys.2021.700585] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 05/27/2021] [Indexed: 01/15/2023] Open
Abstract
A variety of complex risk factors and pathological mechanisms contribute to myocardial stress, which ultimately promotes the development of cardiovascular diseases, including acute cardiac insufficiency, myocardial ischemia, myocardial infarction, high-glycemic myocardial injury, and acute alcoholic cardiotoxicity. Myocardial stress is characterized by abnormal metabolism, excessive reactive oxygen species production, an insufficient energy supply, endoplasmic reticulum stress, mitochondrial damage, and apoptosis. Mitochondria, the main organelles contributing to the energy supply of cardiomyocytes, are key determinants of cell survival and death. Mitophagy is important for cardiomyocyte function and metabolism because it removes damaged and aged mitochondria in a timely manner, thereby maintaining the proper number of normal mitochondria. In this review, we first introduce the general characteristics and regulatory mechanisms of mitophagy. We then describe the three classic mitophagy regulatory pathways and their involvement in myocardial stress. Finally, we discuss the two completely opposite effects of mitophagy on the fate of cardiomyocytes. Our summary of the molecular pathways underlying mitophagy in myocardial stress may provide therapeutic targets for myocardial protection interventions.
Collapse
Affiliation(s)
- Haizhe Ji
- Department of Cardiology, The First Medical Center, Chinese People's Liberation Army Hospital, Medical School of Chinese People's Liberation Army, Beijing, China.,Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Dan Wu
- Department of Cardiology, The First Medical Center, Chinese People's Liberation Army Hospital, Medical School of Chinese People's Liberation Army, Beijing, China
| | - O'Maley Kimberlee
- School of Public Health, University of California, Berkeley, Berkeley, CA, United States
| | - Ruibing Li
- Department of Clinical Laboratory Medicine, The First Medical Center, Medical School of Chinese People's Liberation Army, Beijing, China
| | - Geng Qian
- Department of Cardiology, The First Medical Center, Chinese People's Liberation Army Hospital, Medical School of Chinese People's Liberation Army, Beijing, China
| |
Collapse
|
10
|
ERK1/2: An Integrator of Signals That Alters Cardiac Homeostasis and Growth. BIOLOGY 2021; 10:biology10040346. [PMID: 33923899 PMCID: PMC8072600 DOI: 10.3390/biology10040346] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/15/2021] [Accepted: 04/16/2021] [Indexed: 12/24/2022]
Abstract
Integration of cellular responses to extracellular cues is essential for cell survival and adaptation to stress. Extracellular signal-regulated kinase (ERK) 1 and 2 serve an evolutionarily conserved role for intracellular signal transduction that proved critical for cardiomyocyte homeostasis and cardiac stress responses. Considering the importance of ERK1/2 in the heart, understanding how these kinases operate in both normal and disease states is critical. Here, we review the complexity of upstream and downstream signals that govern ERK1/2-dependent regulation of cardiac structure and function. Particular emphasis is given to cardiomyocyte hypertrophy as an outcome of ERK1/2 activation regulation in the heart.
Collapse
|
11
|
Novel Insight into the Role of Endoplasmic Reticulum Stress in the Pathogenesis of Myocardial Ischemia-Reperfusion Injury. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:5529810. [PMID: 33854692 PMCID: PMC8019635 DOI: 10.1155/2021/5529810] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 02/28/2021] [Accepted: 03/17/2021] [Indexed: 02/06/2023]
Abstract
Impaired function of the endoplasmic reticulum (ER) is followed by evolutionarily conserved cell stress responses, which are employed by cells, including cardiomyocytes, to maintain and/or restore ER homeostasis. ER stress activates the unfolded protein response (UPR) to degrade and remove abnormal proteins from the ER lumen. Although the UPR is an intracellular defense mechanism to sustain cardiomyocyte viability and heart function, excessive activation initiates ER-dependent cardiomyocyte apoptosis. Myocardial ischemia/reperfusion (I/R) injury is a pathological process occurring during or after revascularization of ischemic myocardium. Several molecular mechanisms contribute to the pathogenesis of cardiac I/R injury. Due to the dual protective/degradative effects of ER stress on cardiomyocyte viability and function, it is of interest to understand the basic concepts, regulatory signals, and molecular processes involved in ER stress following myocardial I/R injury. In this review, therefore, we present recent findings related to the novel components of ER stress activation. The complex effects of ER stress and whether they mitigate or exacerbate myocardial I/R injury are summarized to serve as the basis for research into potential therapies for cardioprotection through control of ER homeostasis.
Collapse
|
12
|
Deng Y, Chen S, Zhang M, Li C, He J, Tan Y. AMPKα2 Overexpression Reduces Cardiomyocyte Ischemia-Reperfusion Injury Through Normalization of Mitochondrial Dynamics. Front Cell Dev Biol 2020; 8:833. [PMID: 32984328 PMCID: PMC7481335 DOI: 10.3389/fcell.2020.00833] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 08/04/2020] [Indexed: 01/08/2023] Open
Abstract
Cardiac ischemia-reperfusion (I/R) injury is associated with mitochondrial dysfunction. Recent studies have reported that mitochondrial function is determined by mitochondrial dynamics. Here, we hypothesized that AMPKα2 functions as an upstream mediator that sustains mitochondrial dynamics in cardiac I/R injury and cardiomyocyte hypoxia-reoxygenation (H/R) in vitro. To test this, we analyzed cardiomyocyte viability and survival along with mitochondrial dynamics and function using western blots, qPCR, immunofluorescence, and ELISA. Our results indicated that both AMPKα2 transcription and translation were reduced by H/R injury in cardiomyocytes. Decreased AMPKα2 levels were associated with cardiomyocyte dysfunction and apoptosis. Adenovirus-mediated AMPKα2 overexpression dramatically inhibited H/R-mediated cardiomyocyte damage, possibly by increasing mitochondrial membrane potential, inhibiting cardiomyocyte oxidative stress, attenuating intracellular calcium overload, and inhibiting mitochondrial apoptosis. At the molecular level, AMPKα2 overexpression alleviated abnormal mitochondrial division and improved mitochondrial fusion through activation of the Sirt3/PGC1α pathway. This suggests AMPKα2 contributes to maintaining normal mitochondrial dynamics. Indeed, induction of mitochondrial dynamics disorder abolished the cardioprotective effects afforded by AMPKα2 overexpression. Thus, cardiac I/R-related mitochondrial dynamics disorder can be reversed by AMPKα2 overexpression in a manner dependent on the activation of Sirt3/PGC1α signaling.
Collapse
Affiliation(s)
- Yuanyan Deng
- Department of Cardiology, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Sainan Chen
- Department of Emergency Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Mingming Zhang
- Department of Burns, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Chen Li
- Department of Cardiology, Foshan Hospital Affiliated with Southern Medical University (The Second People's Hospital of Foshan), Foshan, China
| | - Jing He
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Ying Tan
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| |
Collapse
|
13
|
Dexmedetomidine pretreatment protects the heart against apoptosis in ischemia/reperfusion injury in diabetic rats by activating PI3K/Akt signaling in vivo and in vitro. Biomed Pharmacother 2020; 127:110188. [PMID: 32407987 DOI: 10.1016/j.biopha.2020.110188] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 03/26/2020] [Accepted: 04/17/2020] [Indexed: 01/26/2023] Open
Abstract
Dexmedetomidine (DEX) exerts cardioprotection against ischemia/reperfusion injury. However, the precise mechanisms underlying this cardioprotective effect in diabetic rats are still not fully understood. The aim of the present study was to investigate the cardioprotective mechanism of DEX pretreatment on myocardial ischemia/reperfusion (I/R) injury in diabetic rats. A total of 25 streptozotocin-induced diabetic rats were equally randomized into five groups: i) Sham, ii) DEX (100 μg/kg); iii) myocardial I/R; iv) myocardial I/R+DEX (10 μg/kg); and v) myocardial I/R+DEX (100 μg/kg) groups. Primary cardiomyocytes were cultured in DEX for 1 h, and then oxygen and glucose deprivation (OGD)/R for 36 h. These results showed that pretreatment with DEX significantly decreased the I/R-induced size of the myocardial infarction, structural damage, morphological changes and apoptosis in myocardial cells, as well as levels of creatinine kinase, malondialdehyde and cardiac troponin I, and increased the I/R-induced superoxide dismutase activity in vivo and in vitro. Furthermore, immunohistochemical staining and western blot analysis revealed that DEX pretreatment significantly increased the I/R-induced expression levels of B-cell lymphoma 2 (Bcl-2), phosphorylated phosphoinositide 3-kinase (pPI3K) and pAkt, and significantly decreased those of pBcl-2 associated agonist of cell death, Bcl-2-associated X protein and cleaved caspase 3 in vivo and in vitro. In addition, all of these cardioprotective effects of DEX were reversed by yohimbine and LY294002 pretreatment. These results suggested that DEX pretreatment may activate the PI3K/Akt signaling pathway in an α2 adrenoceptor-dependent manner. DEX pretreatment may exert cardioprotective effects against myocardial ischemia/reperfusion injury in diabetic rats through the I/R-induced inhibition of cell apoptosis by activating the PI3K/Akt signaling pathway.
Collapse
|
14
|
MiR-21-5p regulates extracellular matrix degradation and angiogenesis in TMJOA by targeting Spry1. Arthritis Res Ther 2020; 22:99. [PMID: 32357909 PMCID: PMC7195789 DOI: 10.1186/s13075-020-2145-y] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 03/05/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Due to the lack of research on the pathological mechanism of temporomandibular joint osteoarthritis (TMJOA), there are few effective treatment measures in the clinic. In recent years, microRNAs (miRs) have been demonstrated to play an important role in the pathogenesis of osteoarthritis (OA) by regulating a variety of target genes, and the latest evidence shows that miR-21-5p is specifically overexpressed in OA. The purpose of this project was to clarify whether miR-21-5p can regulate the TMJOA process by targeting Spry1. METHODS TMJOA was induced by a unilateral anterior crossbite (UAC) model, and the effect of miR-21-5p knockout on TMJOA was evaluated by toluidine blue (TB), immunohistochemical (IHC) staining, Western blotting (WB) and RT-qPCR. Primary mouse condylar chondrocytes (MCCs) were isolated, cultured and transfected with a series of mimics, inhibitors, siRNA-Spry1 or cDNA Spry1. WB, RT-qPCR, IHC and TB were used to detect the effect of miR-21-5p and its target gene Spry1 on the expression of MMP-13, VEGF and p-ERK1/2 in TMJOA. The effect of miR-21-5p on angiogenesis was evaluated by chick embryo chorioallantoic membrane (CAM) assay and WB. RESULTS In the UAC model, the cartilage thickness and extracellular matrix of miR-21-5p knockout mice were less damaged, and miR-21-5p and UAC model were shown to affect the expression of Spry1, IL-1β, MMP-13, and VEGF. Luciferase experiments confirmed that Spry1 was the direct target of miR-21-5p. The expression levels of Spry1, MMP-13, VEGF and p-ERK1/2 in MCCs transfected with miR-21-5p mimic were higher than those in the inhibitor group. Under the simulated inflammatory environment of IL-1β, the expression levels of MMP-13, VEGF and p-ERK1/2 were positively correlated with miR-21-5p, while Spry1 was negatively correlated with miR-21-5p. Inhibition of miR-21-5p expression and overexpression of Spry1 enhanced the inhibition of MMP-13, VEGF and p-ERK1/2 expression. MiR-21-5p had a significant role in promoting angiogenesis in the chick embryo CAM assay, and this role was clearly mediated by the ERK-MAPK signalling pathway. CONCLUSION This study verified that miR-21-5p can promote the process of TMJOA by targeting Spry1, which provides a new direction for future research on the treatment of this disease.
Collapse
|
15
|
Qi X, Wang J. Melatonin improves mitochondrial biogenesis through the AMPK/PGC1α pathway to attenuate ischemia/reperfusion-induced myocardial damage. Aging (Albany NY) 2020; 12:7299-7312. [PMID: 32305957 PMCID: PMC7202489 DOI: 10.18632/aging.103078] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 03/24/2020] [Indexed: 12/20/2022]
Abstract
Cardiac ischemia/reperfusion injury is associated with reduced mitochondrial turnover and regeneration. There is currently no effective approach to stimulate mitochondrial biogenesis in the reperfused myocardium. In this study, we investigated whether melatonin could increase mitochondrial biogenesis and thus promote mitochondrial homeostasis in cardiomyocytes. Cardiomyocytes were subjected to hypoxia/reoxygenation (H/R) injury with or without melatonin treatment, and various mitochondrial functions were measured. H/R injury repressed mitochondrial biogenesis in cardiomyocytes, whereas melatonin treatment restored mitochondrial biogenesis through the 5’ adenosine monophosphate-activated protein kinase (AMPK)/peroxisome proliferator-activated receptor-gamma coactivator 1 alpha (PGC1α) pathway. Melatonin enhanced mitochondrial metabolism, inhibited mitochondrial oxidative stress, induced mitochondrial fusion and prevented mitochondrial apoptosis in cardiomyocytes subjected to H/R injury. The melatonin-induced improvement in mitochondrial biogenesis was associated with increased cardiomyocyte survival during H/R injury. On the other hand, silencing of PGC1α attenuated the protective effects of melatonin on cardiomyocyte viability, thereby impairing mitochondrial bioenergetics, disrupting the mitochondrial morphology, and activating mitochondrial apoptosis. Thus, H/R injury suppressed mitochondrial biogenesis, while melatonin activated the AMPK/PGC1α pathway and restored mitochondrial biogenesis, ultimately protecting the reperfused heart.
Collapse
Affiliation(s)
- Xueyan Qi
- Department of Cardiology, Tianjin First Central Hospital, Tianjing 300192, China
| | - Jin Wang
- Department of Cardiology, the First Medical Center, Chinese PLA General Hospital, Beijing 100853, China
| |
Collapse
|
16
|
Wang J, Toan S, Zhou H. New insights into the role of mitochondria in cardiac microvascular ischemia/reperfusion injury. Angiogenesis 2020; 23:299-314. [PMID: 32246225 DOI: 10.1007/s10456-020-09720-2] [Citation(s) in RCA: 188] [Impact Index Per Article: 47.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 03/30/2020] [Indexed: 12/19/2022]
Abstract
As reperfusion therapies have become more widely used in acute myocardial infarction patients, ischemia-induced myocardial damage has been markedly reduced, but reperfusion-induced cardiac injury has become increasingly evident. The features of cardiac ischemia-reperfusion (I/R) injury include microvascular perfusion defects, platelet activation and sequential cardiomyocyte death due to additional ischemic events at the reperfusion stage. Microvascular obstruction, defined as a no-reflow phenomenon, determines the infarct zone, myocardial function and peri-operative mortality. Cardiac microvascular endothelial cell injury may occur much earlier and with much greater severity than cardiomyocyte injury. Endothelial cells contain fewer mitochondria than other cardiac cells, and several of the pathological alterations during cardiac microvascular I/R injury involve mitochondria, such as increased mitochondrial reactive oxygen species (mROS) levels and disturbed mitochondrial dynamics. Although mROS are necessary physiological second messengers, high mROS levels induce oxidative stress, endothelial senescence and apoptosis. Mitochondrial dynamics, including fission, fusion and mitophagy, determine the shape, distribution, size and function of mitochondria. These adaptive responses modify extracellular signals and orchestrate intracellular processes such as cell proliferation, migration, metabolism, angiogenesis, permeability transition, adhesive molecule expression, endothelial barrier function and anticoagulation. In this review, we discuss the involvement of mROS and mitochondrial morphofunction in cardiac microvascular I/R injury.
Collapse
Affiliation(s)
- Jin Wang
- Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, 100853, China
| | - Sam Toan
- Department of Chemical Engineering, University of Minnesota-Duluth, Duluth, MN, 55812, USA
| | - Hao Zhou
- Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, 100853, China. .,Department of Cardiology, The First Medical Center, Chinese PLA General Hospital, Beijing, 100853, China.
| |
Collapse
|
17
|
Peng K, Chen WR, Xia F, Liu H, Meng XW, Zhang J, Liu HY, Xia ZY, Ji FH. Dexmedetomidine post-treatment attenuates cardiac ischaemia/reperfusion injury by inhibiting apoptosis through HIF-1α signalling. J Cell Mol Med 2019; 24:850-861. [PMID: 31680420 PMCID: PMC6933328 DOI: 10.1111/jcmm.14795] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 08/21/2019] [Accepted: 09/26/2019] [Indexed: 12/18/2022] Open
Abstract
Hypoxia‐inducible factor 1α (HIF‐1α) plays a critical role in the apoptotic process during cardiac ischaemia/reperfusion (I/R) injury. This study aimed to investigate whether post‐treatment with dexmedetomidine (DEX) could protect against I/R‐induced cardiac apoptosis in vivo and in vitro via regulating HIF‐1α signalling pathway. Rat myocardial I/R was induced by occluding the left anterior descending artery for 30 minutes followed by 6‐hours reperfusion, and cardiomyocyte hypoxia/reoxygenation (H/R) was induced by oxygen‐glucose deprivation for 6 hours followed by 3‐hours reoxygenation. Dexmedetomidine administration at the beginning of reperfusion or reoxygenation attenuated I/R‐induced myocardial injury or H/R‐induced cell death, alleviated mitochondrial dysfunction, reduced the number of apoptotic cardiomyocytes, inhibited the activation of HIF‐1α and modulated the expressions of apoptosis‐related proteins including BCL‐2, BAX, BNIP3, cleaved caspase‐3 and cleaved PARP. Conversely, the HIF‐1α prolyl hydroxylase‐2 inhibitor IOX2 partly blocked DEX‐mediated cardioprotection both in vivo and in vitro. Mechanistically, DEX down‐regulated HIF‐1α expression at the post‐transcriptional level and inhibited the transcriptional activation of the target gene BNIP3. Post‐treatment with DEX protects against cardiac I/R injury in vivo and H/R injury in vitro. These effects are, at least in part, mediated via the inhibition of cell apoptosis by targeting HIF‐1α signalling.
Collapse
Affiliation(s)
- Ke Peng
- Department of Anesthesiology, First Affiliated Hospital of Soochow University, Suzhou, China
| | - Wei-Rong Chen
- Department of Anesthesiology, First Affiliated Hospital of Soochow University, Suzhou, China.,Department of Anesthesiology, Soochow University Affiliated Children's Hospital, Suzhou, China
| | - Fan Xia
- Department of Anesthesiology, First Affiliated Hospital of Soochow University, Suzhou, China
| | - Hong Liu
- Department of Anesthesiology and Pain Medicine, University of California Davis Health, Sacramento, CA, USA
| | - Xiao-Wen Meng
- Department of Anesthesiology, First Affiliated Hospital of Soochow University, Suzhou, China
| | - Juan Zhang
- Department of Anesthesiology, First Affiliated Hospital of Soochow University, Suzhou, China
| | - Hua-Yue Liu
- Department of Anesthesiology, First Affiliated Hospital of Soochow University, Suzhou, China
| | - Zheng-Yuan Xia
- Department of Anesthesiology and Pain Medicine, University of California Davis Health, Sacramento, CA, USA
| | - Fu-Hai Ji
- Department of Anesthesiology, First Affiliated Hospital of Soochow University, Suzhou, China
| |
Collapse
|