1
|
Muckenhuber M, Mengrelis K, Weijler AM, Steiner R, Kainz V, Buresch M, Regele H, Derdak S, Kubetz A, Wekerle T. IL-6 inhibition prevents costimulation blockade-resistant allograft rejection in T cell-depleted recipients by promoting intragraft immune regulation in mice. Nat Commun 2024; 15:4309. [PMID: 38830846 PMCID: PMC11148062 DOI: 10.1038/s41467-024-48574-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 04/30/2024] [Indexed: 06/05/2024] Open
Abstract
The efficacy of costimulation blockade with CTLA4-Ig (belatacept) in transplantation is limited due to T cell-mediated rejection, which also persists after induction with anti-thymocyte globulin (ATG). Here, we investigate why ATG fails to prevent costimulation blockade-resistant rejection and how this barrier can be overcome. ATG did not prevent graft rejection in a murine heart transplant model of CTLA4-Ig therapy and induced a pro-inflammatory cytokine environment. While ATG improved the balance between regulatory T cells (Treg) and effector T cells in the spleen, it had no such effect within cardiac allografts. Neutralizing IL-6 alleviated graft inflammation, increased intragraft Treg frequencies, and enhanced intragraft IL-10 and Th2-cytokine expression. IL-6 blockade together with ATG allowed CTLA4-Ig therapy to achieve long-term, rejection-free heart allograft survival. This beneficial effect was abolished upon Treg depletion. Combining ATG with IL-6 blockade prevents costimulation blockade-resistant rejection, thereby eliminating a major impediment to clinical use of costimulation blockers in transplantation.
Collapse
Affiliation(s)
- Moritz Muckenhuber
- Div. of Transplantation, Dept. of General Surgery, Medical University of Vienna, Vienna, Austria
| | - Konstantinos Mengrelis
- Div. of Transplantation, Dept. of General Surgery, Medical University of Vienna, Vienna, Austria
| | - Anna Marianne Weijler
- Div. of Transplantation, Dept. of General Surgery, Medical University of Vienna, Vienna, Austria
| | - Romy Steiner
- Div. of Transplantation, Dept. of General Surgery, Medical University of Vienna, Vienna, Austria
| | - Verena Kainz
- Div. of Transplantation, Dept. of General Surgery, Medical University of Vienna, Vienna, Austria
| | - Marlena Buresch
- Div. of Transplantation, Dept. of General Surgery, Medical University of Vienna, Vienna, Austria
| | - Heinz Regele
- Clinical Institute of Pathology, Medical University of Vienna, Vienna, Austria
| | - Sophia Derdak
- Core Facilities, Medical University of Vienna, Vienna, Austria
| | - Anna Kubetz
- Div. of Transplantation, Dept. of General Surgery, Medical University of Vienna, Vienna, Austria
| | - Thomas Wekerle
- Div. of Transplantation, Dept. of General Surgery, Medical University of Vienna, Vienna, Austria.
| |
Collapse
|
2
|
Wang Y, Peng X. Bioinformatics analysis characterizes immune infiltration landscape and identifies potential blood biomarkers for heart transplantation. Transpl Immunol 2024; 84:102036. [PMID: 38499050 DOI: 10.1016/j.trim.2024.102036] [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: 12/04/2023] [Revised: 03/15/2024] [Accepted: 03/15/2024] [Indexed: 03/20/2024]
Abstract
BACKGROUND Cardiac allograft rejection (AR) remains a significant complication following heart transplantation. The primary objective of our study is to gain a comprehensive understanding of the fundamental mechanisms involved in AR and identify possible therapeutic targets. METHODS We acquired the GSE87301 dataset from the Gene Expression Omnibus database. In GSE87301, a comparison was conducted on blood samples from patients with and without cardiac allograft rejection (AR and NAR) to detect differentially expressed genes (DEGs). Enrichment analysis was conducted to identify the pathways that show significant enrichment during AR. Machine learning techniques, including the least absolute shrinkage and selection operator regression (LASSO) and random forest (RF) algorithms, were employed to identify potential genes for the diagnosis of AR. The diagnostic value was evaluated using a nomogram and receiver operating characteristic (ROC) curve. Additionally, immune cell infiltration was analyzed to explore any dysregulation of immune cells in AR. RESULTS A total of 114 DEGs were identified from the GSE87301 dataset. These DEGs were mainly found to be enriched in pathways related to the immune system. To identify the signature genes, the LASSO and RF algorithms were used, and four genes, namely ALAS2, HBD, EPB42, and FECH, were identified. The performance of these signature genes was evaluated using the receiver operating characteristic curve (ROC) analysis, which showed that the area under the curve (AUC) values for ALAS2, HBD, EPB42, and FECH were 0.906, 0.881, 0.900, and 0.856, respectively. These findings were further confirmed in the independent datasets and clinical samples. The selection of these specific genes was made to construct a nomogram, which demonstrated excellent diagnostic ability. Additionally, the results of the single-sample gene set enrichment analysis (ssGSEA) revealed that these genes may be involved in immune cell infiltration. CONCLUSION We identified four signature genes (ALAS2, HBD, EPB42, and FECH) as potential peripheral blood diagnostic candidates for AR diagnosis. Additionally, a nomogram was constructed to aid in the diagnosis of heart transplantation. This study offers valuable insights into the identification of candidate genes for heart transplantation using peripheral blood samples.
Collapse
Affiliation(s)
- Yujia Wang
- Queen Mary College of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Xiaoping Peng
- Department of Pharmacy, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China.
| |
Collapse
|
3
|
He Y, Wang X, Li D, Zhu Q, Xiang Y, He Y, Zhang H. ALAS2 overexpression alleviates oxidative stress-induced ferroptosis in aortic aneurysms via GATA1 activation. J Thorac Dis 2024; 16:2510-2527. [PMID: 38738239 PMCID: PMC11087628 DOI: 10.21037/jtd-24-370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 04/18/2024] [Indexed: 05/14/2024]
Abstract
Background Aortic aneurysm, characterized by abnormal dilation of the aorta, poses significant health risks. This study aims to investigate the interaction between 5-aminolevulinate synthase 2 (ALAS2) and GATA-binding protein 1 (GATA1) in ferroptosis and oxidative stress responses in aortic aneurysm. Methods A weighted gene co-expression network analysis (WGCNA) was performed on the differentially expressed genes (DEGs) within the GSE9106 dataset to identify the key module. Subsequently, protein-protein interaction (PPI) network analysis was performed on the key module. Mouse aortic vascular smooth muscle cells (MOVAS) were treated with hydrogen peroxide (H2O2) to induce oxidative stress, and ferroptosis inducers and inhibitors were added to evaluate their effects on iron content and oxidative stress markers. Through a series of in vitro cellular experiments, we assessed cell viability, expression levels of GATA1 and iron mutation-associated proteins, as well as cellular phenotypes such as inflammatory responses and apoptosis rates. Results Three candidate genes (ALAS2, GYPA, and GYPB) were upregulated in the thoracic aortic aneurysm (TAA) samples of the GSE9106 dataset. The H2O2 treatment increased the MOVAS cells' iron content and oxidative stress, upregulated ALAS2 protein levels, and decreased the ferroptosis-related protein levels. ALAS2 overexpression reversed H2O2-induced apoptosis and increased the inflammatory cytokine levels. Additionally, the knockdown of GATA1 partially reversed the protective mechanism of overexpressed ALAS2 on H2O2-induced ferroptosis. Conclusions ALAS2 overexpression reduced H2O2-induced oxidative damage and iron-induced apoptosis in MOVAS cells, and GATA1 knockdown partially reversed this protective effect. These findings suggested that the ALAS2 and GATA1 regulatory pathways may be potential therapeutic targets in aortic aneurysms.
Collapse
Affiliation(s)
- Yunjun He
- Department of the Vascular Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaohui Wang
- Department of the Vascular Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Donglin Li
- Department of the Vascular Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Qianqian Zhu
- Department of the Vascular Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yilang Xiang
- Department of the Vascular Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yangyan He
- Department of the Vascular Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Hongkun Zhang
- Department of the Vascular Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| |
Collapse
|
4
|
Zhang Y, Jiang C, Meng N. Targeting Ferroptosis: A Novel Strategy for the Treatment of Atherosclerosis. Mini Rev Med Chem 2024; 24:1262-1276. [PMID: 38284727 DOI: 10.2174/0113895575273164231130070920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 10/04/2023] [Accepted: 10/11/2023] [Indexed: 01/30/2024]
Abstract
Since ferroptosis was reported in 2012, its application prospects in various diseases have been widely considered, initially as a treatment direction for tumors. Recent studies have shown that ferroptosis is closely related to the occurrence and development of atherosclerosis. The primary mechanism is to affect the occurrence and development of atherosclerosis through intracellular iron homeostasis, ROS and lipid peroxide production and metabolism, and a variety of intracellular signaling pathways. Inhibition of ferroptosis is effective in inhibiting the development of atherosclerosis, and it can bring a new direction for treating atherosclerosis. In this review, we discuss the mechanism of ferroptosis and focus on the relationship between ferroptosis and atherosclerosis, summarize the different types of ferroptosis inhibitors that have been widely studied, and discuss some issues worthy of attention in the treatment of atherosclerosis by targeting ferroptosis.
Collapse
Affiliation(s)
- Yifan Zhang
- School of Biological Science and Technology, University of Jinan, Jinan 250022, China
| | - Chengshi Jiang
- School of Biological Science and Technology, University of Jinan, Jinan 250022, China
| | - Ning Meng
- School of Biological Science and Technology, University of Jinan, Jinan 250022, China
| |
Collapse
|
5
|
Mousavi-Aghdas SA, Farashi E, Naderi N. Iron Dyshomeostasis and Mitochondrial Function in the Failing Heart: A Review of the Literature. Am J Cardiovasc Drugs 2024; 24:19-37. [PMID: 38157159 DOI: 10.1007/s40256-023-00619-z] [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] [Accepted: 11/20/2023] [Indexed: 01/03/2024]
Abstract
Cardiac contraction and relaxation require a substantial amount of energy provided by the mitochondria. The failing heart is adenosine triphosphate (ATP)- and creatine-depleted. Studies have found iron is involved in almost every aspect of mitochondrial function, and previous studies have shown myocardial iron deficiency in heart failure (HF). Many clinicians advocated intravenous iron repletion for HF patients meeting the conventional criteria for systemic iron deficiency. While clinical trials showed improved quality of life, iron repletion failed to significantly impact survival or significant cardiovascular adverse events. There is evidence that in HF, labile iron is trapped inside the mitochondria causing oxidative stress and lipid peroxidation. There is also compelling preclinical evidence demonstrating the detrimental effects of both iron overload and depletion on cardiomyocyte function. We reviewed the mechanisms governing myocardial and mitochondrial iron content. Mitochondrial dynamics (i.e., fusion, fission, mitophagy) and the role of iron were also investigated. Ferroptosis, as an important regulated cell death mechanism involved in cardiomyocyte loss, was reviewed along with agents used to manipulate it. The membrane stability and iron content of mitochondria can be altered by many agents. Some studies are showing promising improvement in the cardiomyocyte function after iron chelation by deferiprone; however, whether the in vitro and in vivo findings will be reflected on on clinical grounds is still unclear. Finally, we briefly reviewed the clinical trials on intravenous iron repletion. There is a need for more well-simulated animal studies to shed light on the safety and efficacy of chelation agents and pave the road for clinical studies.
Collapse
Affiliation(s)
- Seyed Ali Mousavi-Aghdas
- Tuberculosis and Lung Disease Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Rajaie Cardiovascular, Medical, and Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Ebrahim Farashi
- Department of Cardiothoracic Surgery, Imam Reza Medical Research & Training Hospital, Tabriz University of Medical Sciences, Tabriz, Iran
- Rajaie Cardiovascular, Medical, and Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Nasim Naderi
- Department of Cardiothoracic Surgery, Imam Reza Medical Research & Training Hospital, Tabriz University of Medical Sciences, Tabriz, Iran.
- Rajaie Cardiovascular, Medical, and Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| |
Collapse
|
6
|
Miura T, Sato T, Yano T, Takaguri A, Miki T, Tohse N, Nishizawa K. Role of Erythropoiesis-Stimulating Agents in Cardiovascular Protection in CKD Patients: Reappraisal of Their Impact and Mechanisms. Cardiovasc Drugs Ther 2023; 37:1175-1192. [PMID: 35150385 DOI: 10.1007/s10557-022-07321-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/28/2022] [Indexed: 11/28/2022]
Abstract
Erythropoiesis-stimulating agents (ESAs) have markedly reduced the need for blood transfusion for renal anemia and are included in standard therapies for patients with chronic kidney disease (CKD). Various protective effects of ESAs on the cardiovascular system have been discovered through basic research, and the effects have received much attention because the rates of cardiovascular events and mortality are high in CKD patients. However, randomized clinical trials did not provide strong evidence that ESAs exert cardioprotection in humans, including CKD patients. It is difficult to assess the cardioprotective effects of ESAs in CKD patients through the clinical data that has been reported to date because the relationship between hemoglobin level rather than ESA dose and cardiovascular event rates was examined in most studies. Interestingly, recent studies using a rat model of CKD showed that the infarct size-limiting effect of an ESA was lost when its dose was increased to a level that normalized blood hemoglobin levels, suggesting that the optimal dose of an ESA for myocardial protection is less than the dose required to normalize hemoglobin levels. Furthermore, animal models of traditional coronary risk factors or comorbidities were resistant to the cardioprotective effects of ESAs because of interruptions in signal-mediated mechanisms downstream of erythropoietin receptors. In this review, we briefly discuss basic and clinical data on the impact of anemia on coronary and systemic circulation, the effects of CKD on the cardiovascular system, and the multiple pharmacological actions of ESAs to examine whether the ESAs that are prescribed for renal anemia exert any cardioprotection in patients with CKD.
Collapse
Affiliation(s)
- Tetsuji Miura
- Department of Clinical Pharmacology, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 15-4-1, Maeda-7, Teine-ku, Sapporo, Japan.
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan.
| | - Tatsuya Sato
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
- Department of Cellular Physiology and Signal Transduction, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Toshiyuki Yano
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Akira Takaguri
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, Sapporo, Japan
| | - Takayuki Miki
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
- Department of Cardiology and Diabetes, Oji General Hospital, Tomakomai, Japan
| | - Noritsugu Tohse
- Department of Cellular Physiology and Signal Transduction, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Keitaro Nishizawa
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
- Department of Nephrology, Asahikawa Red Cross, Hospital, Asahikawa, Japan
| |
Collapse
|
7
|
Lu Z, Li Y. New Clues to Cardiovascular Disease: Erythrocyte Lifespan. Aging Dis 2023; 14:2003-2014. [PMID: 37199588 PMCID: PMC10676783 DOI: 10.14336/ad.2023.0506] [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: 01/01/2023] [Accepted: 05/06/2023] [Indexed: 05/19/2023] Open
Abstract
Determination of erythrocyte lifespan is an important part of the diagnosis of hemolytic diseases. Recent studies have revealed alterations in erythrocyte lifespan among patients with various cardiovascular diseases, including atherosclerotic coronary heart disease, hypertension, and heart failure. This review summarizes the progress of research on erythrocyte lifespan in cardiovascular diseases.
Collapse
Affiliation(s)
- Ziyu Lu
- Department of Cardiology, the Second Affiliated Hospital, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, China
| | - Yuanmin Li
- Department of Cardiology, the Second Affiliated Hospital, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, China
| |
Collapse
|
8
|
Cong J, Li M, Wang Y, Ma H, Yang X, Gao J, Wang L, Wu X. Protective effects of electroacupuncture on polycystic ovary syndrome in rats: Down-regulating Alas2 to inhibit apoptosis, oxidative stress, and mitochondrial dysfunction in ovarian granulosa cells. Tissue Cell 2023; 82:102090. [PMID: 37075681 DOI: 10.1016/j.tice.2023.102090] [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: 05/18/2022] [Revised: 01/03/2023] [Accepted: 04/10/2023] [Indexed: 04/21/2023]
Abstract
Polycystic ovary syndrome (PCOS) is a heterogeneous endocrine disorder affecting women at reproductive age. The therapeutic effect of electroacupuncture (EA) on PCOS has been revealed, while the anti-PCOS mechanisms of EA have not been fully explored. In this study, PCOS were induced in rats by daily injection with dehydroepiandrosterone (DHEA) for 20 days and EA treatment was performed for 5 weeks. The mRNA expression profiles in ovarian tissues from control, PCOS, and EA-treated rats were examined by high-throughput mRNA sequencing. 5'-aminolevulinate synthase 2 (Alas2), a vital rate-limiting enzyme of the heme synthesis pathway, was selected to be further studied. PCOS led to the upregulation of Alas2 mRNA, whereas EA treatment restored this change. In vitro, primary ovarian granulosa cells (GCs) were challenged with H2O2 to mimic the oxidative stress (OS) state in PCOS. H2O2 induced apoptosis, OS, mitochondrial dysfunction, as well as Alas2 overexpression in GCs, while lentivirus-mediated Alas2 knockdown evidently restrained the above impairments. In summary, this study highlights the crucial role of Alas2 in cell apoptosis, OS, and mitochondrial dysfunction of PCOS GCs and provides potential therapeutic candidates for further investigation on PCOS treatment.
Collapse
Affiliation(s)
- Jing Cong
- The First Department of Gynecology, First Affiliated Hospital, Heilongjiang University of Chinese Medicine, Harbin 150040, Heilongjiang Province, China
| | - Mubai Li
- The First Department of Gynecology, First Affiliated Hospital, Heilongjiang University of Chinese Medicine, Harbin 150040, Heilongjiang Province, China
| | - Yu Wang
- The First Department of Gynecology, First Affiliated Hospital, Heilongjiang University of Chinese Medicine, Harbin 150040, Heilongjiang Province, China
| | - Hongli Ma
- The First Department of Gynecology, First Affiliated Hospital, Heilongjiang University of Chinese Medicine, Harbin 150040, Heilongjiang Province, China
| | - Xinming Yang
- The First Department of Gynecology, First Affiliated Hospital, Heilongjiang University of Chinese Medicine, Harbin 150040, Heilongjiang Province, China
| | - Jingshu Gao
- The First Department of Gynecology, First Affiliated Hospital, Heilongjiang University of Chinese Medicine, Harbin 150040, Heilongjiang Province, China
| | - Long Wang
- Department of Acupuncture, First Affiliated Hospital, Heilongjiang University of Chinese Medicine, Harbin 150040, Heilongjiang Province, China
| | - Xiaoke Wu
- The First Department of Gynecology, First Affiliated Hospital, Heilongjiang University of Chinese Medicine, Harbin 150040, Heilongjiang Province, China; Heilongjiang Provincial Hospital, Harbin 150036, Heilongjiang Province, China.
| |
Collapse
|
9
|
Sato T, Chang HC, Sawicki KT, Ardehali H. Optimized protocol for quantification of mitochondrial non-heme and heme iron content in mouse tissues and cultured cells. STAR Protoc 2023; 4:102064. [PMID: 36853672 PMCID: PMC9881402 DOI: 10.1016/j.xpro.2023.102064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 12/20/2022] [Accepted: 01/05/2023] [Indexed: 01/26/2023] Open
Abstract
Impaired mitochondrial iron metabolism is associated with aging and a variety of diseases, and there is a growing need to accurately quantify mitochondrial iron levels. This protocol provides an optimized method for evaluating non-heme and heme iron in mitochondrial and cytosolic fractions of tissues and cultured cells. Our protocol consists of three steps: sample fractionation, non-heme iron measurement, and heme iron measurement. For complete details on the use and execution of this protocol, please refer to Sato et al. (2022).1.
Collapse
Affiliation(s)
- Tatsuya Sato
- Feinberg Cardiovascular Research Institute, Northwestern University School of Medicine, Chicago, IL, USA; Department of Cellular Physiology and Signal Transduction, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Hsiang-Chun Chang
- Feinberg Cardiovascular Research Institute, Northwestern University School of Medicine, Chicago, IL, USA
| | - Konrad T Sawicki
- Feinberg Cardiovascular Research Institute, Northwestern University School of Medicine, Chicago, IL, USA
| | - Hossein Ardehali
- Feinberg Cardiovascular Research Institute, Northwestern University School of Medicine, Chicago, IL, USA.
| |
Collapse
|
10
|
Lupu M, Coada CA, Tudor DV, Baldea I, Florea A, Toma VA, Lupsor A, Moldovan R, Decea N, Filip GA. Iron chelation alleviates multiple pathophysiological pathways in a rat model of cardiac pressure overload. Free Radic Biol Med 2023; 200:1-10. [PMID: 36822542 DOI: 10.1016/j.freeradbiomed.2023.02.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/10/2023] [Accepted: 02/21/2023] [Indexed: 02/25/2023]
Abstract
Iron dysmetabolism affects a great proportion of heart failure patients, while chronic hypertension is one of the most common risk factors for heart failure and death in industrialized countries. Serum data from reduced ejection fraction heart failure patients show a relative or absolute iron deficiency, whereas cellular myocardial analyses field equivocal data. An observed increase in organellar iron deposits was incriminated to cause reactive oxygen species formation, lipid peroxidation, and cell death. Therefore, we studied the effects of iron chelation on a rat model of cardiac hypertrophy. Suprarenal abdominal aortic constriction was achieved surgically, with a period of nine weeks to accommodate the development of chronic pressure overload. Next, deferiprone (100 mg/kg/day), a lipid-permeable iron chelator, was administered for two weeks. Pressure overload resulted in increased inflammation, fibrotic remodeling, lipid peroxidation, left ventricular hypertrophy and mitochondrial iron derangements. Deferiprone reduced cardiac inflammation, lipid peroxidation, mitochondrial iron levels, and hypertrophy, without affecting circulating iron levels or ejection fraction. In conclusion, metallic molecules may pose ambivalent effects within the cardiovascular system, with beneficial effects of iron redistribution, chiefly in the mitochondria.
Collapse
Affiliation(s)
- Mihai Lupu
- Iuliu Hatieganu University of Medicine and Pharmacy, Dept. of Physiology, Cluj-Napoca, Romania
| | - Camelia Alexandra Coada
- Iuliu Hatieganu University of Medicine and Pharmacy, Dept. of Molecular Sciences, 400394, Cluj-Napoca, Romania; University of Bologna, Department of Medical and Surgical Sciences (DIMEC), 40138, Bologna, Italy
| | - Diana-Valentina Tudor
- Iuliu Hatieganu University of Medicine and Pharmacy, Dept. of Physiology, Cluj-Napoca, Romania
| | - Ioana Baldea
- Iuliu Hatieganu University of Medicine and Pharmacy, Dept. of Physiology, Cluj-Napoca, Romania
| | - Adrian Florea
- Iuliu Hatieganu University of Medicine and Pharmacy, Dept. of Cell and Molecular Biology, Cluj-Napoca, Romania.
| | - Vlad-Alexandru Toma
- Babeș-Bolyai University, Department of Molecular Biology and Biotechnologies, Clinicilor Street No. 4-6, 400000, Cluj-Napoca, Cluj County, Romania; Institute of Biological Research, Republicii Street No. 48, 400015, Cluj-Napoca, Cluj County, Romania
| | - Ana Lupsor
- Iuliu Hatieganu University of Medicine and Pharmacy, Dept. of Physiology, Cluj-Napoca, Romania
| | - Remus Moldovan
- Iuliu Hatieganu University of Medicine and Pharmacy, Dept. of Physiology, Cluj-Napoca, Romania
| | - Nicoleta Decea
- Iuliu Hatieganu University of Medicine and Pharmacy, Dept. of Physiology, Cluj-Napoca, Romania
| | - Gabriela Adriana Filip
- Iuliu Hatieganu University of Medicine and Pharmacy, Dept. of Physiology, Cluj-Napoca, Romania
| |
Collapse
|
11
|
Abstract
The cardiovascular system requires iron to maintain its high energy demands and metabolic activity. Iron plays a critical role in oxygen transport and storage, mitochondrial function, and enzyme activity. However, excess iron is also cardiotoxic due to its ability to catalyze the formation of reactive oxygen species and promote oxidative damage. While mammalian cells have several redundant iron import mechanisms, they are equipped with a single iron-exporting protein, which makes the cardiovascular system particularly sensitive to iron overload. As a result, iron levels are tightly regulated at many levels to maintain homeostasis. Iron dysregulation ranges from iron deficiency to iron overload and is seen in many types of cardiovascular disease, including heart failure, myocardial infarction, anthracycline-induced cardiotoxicity, and Friedreich's ataxia. Recently, the use of intravenous iron therapy has been advocated in patients with heart failure and certain criteria for iron deficiency. Here, we provide an overview of systemic and cellular iron homeostasis in the context of cardiovascular physiology, iron deficiency, and iron overload in cardiovascular disease, current therapeutic strategies, and future perspectives.
Collapse
Affiliation(s)
- Konrad Teodor Sawicki
- Feinberg Cardiovascular and Renal Research Institute, Northwestern University, Chicago, IL 60611
- Division of Cardiology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611
| | - Adam De Jesus
- Feinberg Cardiovascular and Renal Research Institute, Northwestern University, Chicago, IL 60611
| | - Hossein Ardehali
- Feinberg Cardiovascular and Renal Research Institute, Northwestern University, Chicago, IL 60611
- Division of Cardiology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611
| |
Collapse
|
12
|
Luong R, Ribeiro RV, Rangan A, Naganathan V, Blyth F, Waite LM, Handelsman DJ, Le Couteur DG, Seibel MJ, Hirani V. Haem Iron Intake Is Associated with Increased Major Adverse Cardiovascular Events, All-Cause Mortality, Congestive Cardiac Failure, and Coronary Revascularisation in Older Men: The Concord Health and Ageing in Men Project. J Nutr Health Aging 2023; 27:559-570. [PMID: 37498103 DOI: 10.1007/s12603-023-1945-6] [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: 02/27/2023] [Accepted: 06/22/2023] [Indexed: 07/28/2023]
Abstract
BACKGROUND Nutritional intake can influence major adverse cardiovascular events (MACE). Dietary iron is found in two forms: haem-iron (HI) only found in animal sources and non-haem iron (NHI) present mostly in plant sources. OBJECTIVE We evaluated the associations between dietary iron intakes with MACE and iron status biomarkers. DESIGN Prospective cohort study. SETTING The Concord Health and Ageing in Men Project, Sydney, Australia. PARTICIPANTS 539 community-dwelling older Australian men aged 75 years and older. METHODS Men underwent nutritional assessment using a validated diet history questionnaire. Entries were converted to food groups and nutrients. The dietary calculation was used to derive HI and NHI intakes from total iron intakes. Analyses of iron intakes with iron status biomarkers were conducted using linear regression, and with MACE and individual endpoints were conducted using Cox regression. Five-point MACE comprised of all-cause mortality, myocardial infarction (MI), congestive cardiac failure (CCF), coronary revascularisation, and/or ischaemic stroke. Four-point MACE included the four endpoints of MI, CCF, coronary revascularisation, and/or ischaemic stroke, and excluded all-cause mortality. RESULTS At a median of 5.3 (4.6 - 6.3) years follow-up, the incidences were: 31.2% (n = 168) five-point MACE, 17.8% (n = 96) four-point MACE excluding all-cause mortality, 20.1% (n = 111) all-cause mortality, 11.3% (n = 61) CCF, and 3.1% (n = 15) coronary revascularisation. In adjusted analyses, higher HI intake (per 1mg increment) was associated with increased five-point MACE (HR: 1.45 [95% CI: 1.16, 1.80, P = .001]), four-point MACE excluding all-cause mortality (HR: 1.64 [95% CI: 1.26, 2.15, P <.001]), all-cause mortality (HR: 1.51 [95% CI: 1.15, 1.99, P = .003]), CCF (HR: 2.08 [95% CI: 1.45, 2.98, P <.001]), and coronary revascularisation (HR: 1.89 [95% CI: 1.15, 3.10, P = .012]). Compared with the bottom tertile of NHI intake, the middle tertile of NHI intake was associated with reduced risk of all-cause mortality (HR: 0.56 [95% CI: 0.33, 0.96, P = .035]). Total iron intake was not associated with MACE and individual endpoints. Dietary iron intakes were not associated with serum iron and haemoglobin. CONCLUSION Higher haem iron intake was independently associated with increased risks of five-point MACE, four-point MACE excluding all-cause mortality, all-cause mortality, CCF, and coronary revascularisation in older men over 5 years.
Collapse
Affiliation(s)
- R Luong
- Rebecca Luong, Level 4, Charles Perkins Centre D17, University of Sydney, NSW 2006, Australia,
| | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Zhang J, Song Y, Li Y, Lin HB, Fang X. Iron homeostasis in the heart: Molecular mechanisms and pharmacological implications. J Mol Cell Cardiol 2023; 174:15-24. [PMID: 36375319 DOI: 10.1016/j.yjmcc.2022.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 11/01/2022] [Accepted: 11/02/2022] [Indexed: 11/13/2022]
Abstract
Iron is necessary for the life of practically all living things, yet it may also harm people toxically. Accordingly, humans and other mammals have evolved an effective and tightly regulatory system to maintain iron homeostasis in healthy tissues, including the heart. Iron deficiency is common in patients with heart failure, and is associated with worse prognosis in this population; while the prevalence of iron overload-related cardiovascular disorders is also increasing. Therefore, enhancing the therapy of patients with cardiovascular disorders requires a thorough understanding of iron homeostasis. Here, we give readers an overview of the fundamental mechanisms governing systemic iron homeostasis as well as the most recent knowledge about the intake, storage, use, and export of iron from the heart. Genetic mouse models used for investigation of iron metabolism in various in vivo scenarios are summarized and highlighted. We also go through different clinical conditions and therapeutic approaches that target cardiac iron dyshomeostasis. Finally, we conclude the review by outlining the present knowledge gaps and important open questions in this field in order to guide future research on cardiac iron metabolism.
Collapse
Affiliation(s)
- Jiawei Zhang
- Department of Nutrition and Toxicology, School of Public Health, Hangzhou Normal University, Hangzhou, China
| | - Yijing Song
- Department of Nutrition and Toxicology, School of Public Health, Hangzhou Normal University, Hangzhou, China
| | - You Li
- Department of Nutrition and Toxicology, School of Public Health, Hangzhou Normal University, Hangzhou, China
| | - Han-Bin Lin
- Zhongshan Institute for Drug Discovery, SIMM, CAS, Zhongshan, China; Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Xuexian Fang
- Department of Nutrition and Toxicology, School of Public Health, Hangzhou Normal University, Hangzhou, China; Key Laboratory of Elemene Class Anti-cancer Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China.
| |
Collapse
|
14
|
METTL3-modified lncRNA-SNHG8 binds to PTBP1 to regulate ALAS2 expression to increase oxidative stress and promote myocardial infarction. Mol Cell Biochem 2022; 478:1217-1229. [PMID: 36282350 DOI: 10.1007/s11010-022-04570-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 09/16/2022] [Indexed: 10/31/2022]
Abstract
Myocardial infarction (MI) is one of the important factors leading to death in today's society. Therefore, to study the related mechanism of MI and reduce myocardial ischemia-reperfusion injury is an important link to reduce MI injury. MI mice in vivo and cell model in vitro were constructed. The cardiac function and MI area of mice were detected, and myocardial tissue injury was detected by HE staining. ALAS2 expression in mice myocardial tissue was detected by IHC. The expressions of lncRNA-SNHG8, METTL3, PTBP1 and ALAS2 in myocardial tissue or cardiomyocytes were detected by qRT-PCR assay. MTT assay was used to measured viability of cardiomyocytes. The oxidative stress level in myocardial tissue or cardiomyocytes was detected by ELISA assay and ROS assay. RIP-qPCR and RNA pulldown assays determined the interaction between METTL3 and lncRNA-SNHG8, as well as PTBP1 and ALAS2. lncRNA-SNHG8 knockdown in MI mice was reduced myocardial infarction size, alleviated myocardial tissue injury and oxidative stress, and inhibited ALAS2 expression in myocardial tissue. RNA pulldown and RIP assays showed that lncRNA-SNHG8 binged with PTBP1 and PTBP1 interacted with ALAS2 mRNA. Knockdown of lncRNA-SNHG8, METTL3 or PTBP1 in MI cells enhanced viability of myocardial cells, attenuated ROS release and MDA level, increased SOD level, alleviated oxidative stress. ALAS overexpression attenuated the corresponding effect of knockdown of lncRNA-SNHG8 and/or PTBP1 on MI cells. In sum, our paper is demonstrated for the first time that METTL3 can promote lncRNA-SNHG8 through m6A modification, thereby regulating ALAS2 to induce oxidative stress and aggravate myocardial injury.
Collapse
|
15
|
Nakatsukasa T, Ishizu T, Ouchi M, Murakoshi N, Sato K, Yamamoto M, Kawanishi K, Seo Y, Ieda M. Sodium Glucose Co-Transporter 2 Inhibitors Improve Renal Congestion and Left Ventricular Fibrosis in Rats With Hypertensive Heart Failure. Circ J 2022; 86:2029-2039. [PMID: 35944977 DOI: 10.1253/circj.cj-22-0105] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Elevated central venous pressure (CVP) in heart failure causes renal congestion, which deteriorates prognosis. Sodium glucose co-transporter 2 inhibitor (SGLT2-i) improves kidney function and heart failure prognosis; however, it is unknown whether they affect renal congestion. This study investigated the effect of SGLT2-i on the kidney and left ventricle using model rats with hypertensive heart failure.Methods and Results: Eight rats were fed a 0.3% low-salt diet (n=7), and 24 rats were fed an 8% high-salt diet, and they were divided into 3 groups of untreated (n=6), SGLT2-i (canagliflozin; n=6), and loop diuretic (furosemide; n=5) groups after 11 weeks of age. At 18 weeks of age, CVP and renal intramedullary pressure (RMP) were monitored directly by catheterization. We performed contrast-enhanced ultrasonography to evaluate intrarenal perfusion. In all high-salt fed groups, systolic blood pressure was elevated (P=0.287). The left ventricular ejection fraction did not differ among high-salt groups. Although CVP decreased in both the furosemide (P=0.032) and the canagliflozin groups (P=0.030), RMP reduction (P=0.003) and preserved renal medulla perfusion were only observed in the canagliflozin group (P=0.001). Histological analysis showed less cast formation in the intrarenal tubule (P=0.032), left ventricle fibrosis (P<0.001), and myocyte thickness (P<0.001) in the canagliflozin group than in the control group. CONCLUSIONS These results suggest that SGLT2-i causes renal decongestion and prevents left ventricular hypertrophy, fibrosis, and dysfunction.
Collapse
Affiliation(s)
- Tomofumi Nakatsukasa
- Department of Cardiology, Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Tomoko Ishizu
- Department of Cardiology, Faculty of Medicine, University of Tsukuba
| | - Masumi Ouchi
- Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | | | - Kimi Sato
- Department of Cardiology, Faculty of Medicine, University of Tsukuba
| | | | - Kunio Kawanishi
- Department of Experimental Pathology, Faculty of Medicine, University of Tsukuba
| | - Yoshihiro Seo
- Department of Cardiology, Faculty of Medicine, Nagoya City University Graduate School of Medical Sciences
| | - Masaki Ieda
- Department of Cardiology, Faculty of Medicine, University of Tsukuba
| |
Collapse
|
16
|
Kouzu H, Tatekoshi Y, Chang HC, Shapiro JS, McGee WA, De Jesus A, Ben-Sahra I, Arany Z, Leor J, Chen C, Blackshear PJ, Ardehali H. ZFP36L2 suppresses mTORc1 through a P53-dependent pathway to prevent peripartum cardiomyopathy in mice. J Clin Invest 2022; 132:e154491. [PMID: 35316214 PMCID: PMC9106345 DOI: 10.1172/jci154491] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 03/17/2022] [Indexed: 01/13/2023] Open
Abstract
Pregnancy is associated with substantial physiological changes of the heart, and disruptions in these processes can lead to peripartum cardiomyopathy (PPCM). The molecular processes that cause physiological and pathological changes in the heart during pregnancy are not well characterized. Here, we show that mTORc1 was activated in pregnancy to facilitate cardiac enlargement that was reversed after delivery in mice. mTORc1 activation in pregnancy was negatively regulated by the mRNA-destabilizing protein ZFP36L2 through its degradation of Mdm2 mRNA and P53 stabilization, leading to increased SESN2 and REDD1 expression. This pathway impeded uncontrolled cardiomyocyte hypertrophy during pregnancy, and mice with cardiac-specific Zfp36l2 deletion developed rapid cardiac dysfunction after delivery, while prenatal treatment of these mice with rapamycin improved postpartum cardiac function. Collectively, these data provide what we believe to be a novel pathway for the regulation of mTORc1 through mRNA stabilization of a P53 ubiquitin ligase. This pathway was critical for normal cardiac growth during pregnancy, and its reduction led to PPCM-like adverse remodeling in mice.
Collapse
Affiliation(s)
- Hidemichi Kouzu
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Feinberg Cardiovascular and Renal Research Institute and
| | - Yuki Tatekoshi
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Feinberg Cardiovascular and Renal Research Institute and
| | - Hsiang-Chun Chang
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Feinberg Cardiovascular and Renal Research Institute and
| | - Jason S. Shapiro
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Feinberg Cardiovascular and Renal Research Institute and
| | - Warren A. McGee
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Adam De Jesus
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Feinberg Cardiovascular and Renal Research Institute and
| | - Issam Ben-Sahra
- Department of Biochemistry, Northwestern University, Chicago, Illinois, USA
| | - Zoltan Arany
- Department of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jonathan Leor
- Cardiovascular Research Institute, Tel Aviv University and Sheba Medical Center, Tel Aviv, Israel
| | - Chunlei Chen
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Feinberg Cardiovascular and Renal Research Institute and
| | - Perry J. Blackshear
- Signal Transduction Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | - Hossein Ardehali
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Feinberg Cardiovascular and Renal Research Institute and
| |
Collapse
|
17
|
Wang X, Meng X, Meng L, Guo Y, Li Y, Yang C, Pei Z, Li J, Wang F. Joint efficacy of the three biomarkers SNCA, GYPB and HBG1 for atrial fibrillation and stroke: Analysis via the support vector machine neural network. J Cell Mol Med 2022; 26:2010-2022. [PMID: 35138035 PMCID: PMC8980947 DOI: 10.1111/jcmm.17224] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 01/13/2022] [Accepted: 01/24/2022] [Indexed: 12/29/2022] Open
Abstract
Atrial fibrillation (AF) is the most common type of persistent arrhythmia. Although its incidence has been increasing, the pathogenesis of AF in stroke remains unclear. In this study, a total of 30 participants were recruited, including 10 controls, 10 patients with AF and 10 patients with AF and stroke (AF + STROKE). Differentially expressed genes (DEGs) were identified, and functional annotation of DEGs, comparative toxicogenomic database analysis associated with cardiovascular diseases, and predictions of miRNAs of hub genes were performed. Using RT‐qPCR, biological process and support vector machine neural networks, numerous DEGs were found to be related to AF. HBG1, SNCA and GYPB were found to be upregulated in the AF group. Higher expression of hub genes in AF and AF + STROKE groups was detected via RT‐PCR. Upon training the biological process neural network of SNCA and GYPB for HBG1, only small differences were detected. Based on the support vector machine, the predicted value of SNCA and GYPB for HBG1 was 0.9893. Expression of the hub genes of HBG1, SNCA and GYPB might therefore be significantly correlated to AF. These genes are involved in the incidence of AF complicated by stroke, and may serve as targets for early diagnosis and treatment.
Collapse
Affiliation(s)
- Xiang Wang
- Department of Cardiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China.,Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Xuyang Meng
- Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Lingbing Meng
- Department of Cardiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China.,Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Ying Guo
- Department of Cardiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Yi Li
- Department of Cardiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Chenguang Yang
- Department of Cardiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Zuowei Pei
- Department of Cardiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Jiahan Li
- The First Mobile Corps of People's Armed Police, Beijing, China
| | - Fang Wang
- Department of Cardiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| |
Collapse
|
18
|
Guo Y, Zhao H, Lin Z, Ye T, Xu D, Zeng Q. Heme in Cardiovascular Diseases: A Ubiquitous Dangerous Molecule Worthy of Vigilance. Front Cell Dev Biol 2022; 9:781839. [PMID: 35127704 PMCID: PMC8807526 DOI: 10.3389/fcell.2021.781839] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 12/13/2021] [Indexed: 12/20/2022] Open
Abstract
Heme, the protoporphyrin IX iron complex is widely present in the human body and it is involved in oxygen storage, electron transfer, and enzymatic reactions. However, free heme can be toxic as it catalyzes the production of reactive oxygen species, oxidizes lipids and proteins, and causes DNA damage, thereby inducing a pro-inflammatory environment. The generation, metabolism, and degradation of heme in the human body are regulated by precise mechanisms to ensure that heme remains non-toxic. However, in several types of cardiovascular diseases, impaired metabolism and exposure to heme may occur in pathological processes, including neovascularization, internal hemorrhage, ischemia, and reperfusion. Based on years of research, in this review, we aimed to summarize the underlying mechanisms by which heme contributes to the development of cardiovascular diseases through oxidative stress, relative pathway gene expression regulation and phenotypic changes in cells. Excess heme plays a detrimental role in atherosclerosis, heart failure, myocardial ischemia-reperfusion injury, degenerative aortic valve stenosis, cardiac iron overload. Recent researches revealed that in some cases heme involved in cardiac damage though ferroptosis. Thus, heme concentrations beyond normal levels are dangerous. Further research on the role of heme in cardiovascular diseases is needed.
Collapse
Affiliation(s)
- Yuyang Guo
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Southern Medical University, Guangzhou, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou, China
| | - Hengli Zhao
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Southern Medical University, Guangzhou, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou, China
| | - Zhibin Lin
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Southern Medical University, Guangzhou, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou, China
| | - Taochun Ye
- Department of Cardiopulmonary Rehabilitation, First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Dingli Xu
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Southern Medical University, Guangzhou, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou, China
- *Correspondence: Qingchun Zeng, ; Dingli Xu,
| | - Qingchun Zeng
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Shock and Microcirculation, Southern Medical University, Guangzhou, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou, China
- *Correspondence: Qingchun Zeng, ; Dingli Xu,
| |
Collapse
|
19
|
Jayakumar D, S Narasimhan KK, Periandavan K. Triad role of hepcidin, ferroportin, and Nrf2 in cardiac iron metabolism: From health to disease. J Trace Elem Med Biol 2022; 69:126882. [PMID: 34710708 DOI: 10.1016/j.jtemb.2021.126882] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 09/29/2021] [Accepted: 10/19/2021] [Indexed: 11/28/2022]
Abstract
Iron is an essential trace element required for several vital physiological and developmental processes, including erythropoiesis, bone, and neuronal development. Iron metabolism and oxygen homeostasis are interlinked to perform a vital role in the functionality of the heart. The metabolic machinery of the heart utilizes almost 90 % of oxygen through the electron transport chain. To handle this tremendous level of oxygen, the iron metabolism in the heart is utmost crucial. Iron availability to the heart is therefore tightly regulated by (i) the hepcidin/ferroportin axis, which controls dietary iron absorption, storage, and recycling, and (ii) iron regulatory proteins 1 and 2 (IRP1/2) via hypoxia inducible factor 1 (HIF1) pathway. Despite iron being vital to the heart, recent investigations have demonstrated that iron imbalance is a common manifestation in conditions of heart failure (HF), since free iron readily transforms between Fe2+ and Fe3+via the Fenton reaction, leading to reactive oxygen species (ROS) production and oxidative damage. Therefore, to combat iron-mediated oxidative stress, targeting Nrf2/ARE antioxidant signaling is rational. The involvement of Nrf2 in regulating several genes engaged in heme synthesis, iron storage, and iron export is beginning to be uncovered. Consequently, it is possible that Nrf2/hepcidin/ferroportin might act as an epicenter connecting iron metabolism to redox alterations. However, the mechanism bridging the two remains obscure. In this review, we tried to summarize the contemporary insight of how cardiomyocytes regulate intracellular iron levels and discussed the mechanisms linking cardiac dysfunction with iron imbalance. Further, we emphasized the impact of Nrf2 on the interplay between systemic/cardiac iron control in the context of heart disease, particularly in myocardial ischemia and HF.
Collapse
Affiliation(s)
- Deepthy Jayakumar
- Department of Medical Biochemistry, Dr. ALM Post Graduate Institute for Basic Medical Sciences, University of Madras, Chennai, 600113, Tamil Nadu, India
| | - Kishore Kumar S Narasimhan
- Department of Pharmacology and Neurosciences, Creighton University, 2500 California Plaza, Omaha, NE, USA
| | - Kalaiselvi Periandavan
- Department of Medical Biochemistry, Dr. ALM Post Graduate Institute for Basic Medical Sciences, University of Madras, Chennai, 600113, Tamil Nadu, India.
| |
Collapse
|
20
|
Alnuwaysir RIS, Hoes MF, van Veldhuisen DJ, van der Meer P, Beverborg NG. Iron Deficiency in Heart Failure: Mechanisms and Pathophysiology. J Clin Med 2021; 11:125. [PMID: 35011874 PMCID: PMC8745653 DOI: 10.3390/jcm11010125] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/17/2021] [Accepted: 12/22/2021] [Indexed: 12/15/2022] Open
Abstract
Iron is an essential micronutrient for a myriad of physiological processes in the body beyond erythropoiesis. Iron deficiency (ID) is a common comorbidity in patients with heart failure (HF), with a prevalence reaching up to 59% even in non-anaemic patients. ID impairs exercise capacity, reduces the quality of life, increases hospitalisation rate and mortality risk regardless of anaemia. Intravenously correcting ID has emerged as a promising treatment in HF as it has been shown to alleviate symptoms, improve quality of life and exercise capacity and reduce hospitalisations. However, the pathophysiology of ID in HF remains poorly characterised. Recognition of ID in HF triggered more research with the aim to explain how correcting ID improves HF status as well as the underlying causes of ID in the first place. In the past few years, significant progress has been made in understanding iron homeostasis by characterising the role of the iron-regulating hormone hepcidin, the effects of ID on skeletal and cardiac myocytes, kidneys and the immune system. In this review, we summarise the current knowledge and recent advances in the pathophysiology of ID in heart failure, the deleterious systemic and cellular consequences of ID.
Collapse
Affiliation(s)
| | | | | | | | - Niels Grote Beverborg
- Department of Cardiology, University Medical Center Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (R.I.S.A.); (M.F.H.); (D.J.v.V.); (P.v.d.M.)
| |
Collapse
|
21
|
Kang DY, Sp N, Jo ES, Lee JM, Jang KJ. New Insights into the Pivotal Role of Iron/Heme Metabolism in TLR4/NF-κB Signaling-Mediated Inflammatory Responses in Human Monocytes. Cells 2021; 10:cells10102549. [PMID: 34685529 PMCID: PMC8534183 DOI: 10.3390/cells10102549] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 09/23/2021] [Accepted: 09/24/2021] [Indexed: 02/04/2023] Open
Abstract
Iron metabolism and heme biosynthesis are essential processes in cells during the energy cycle. Alteration in these processes could create an inflammatory condition, which results in tumorigenesis. Studies are conducted on the exact role of iron/heme metabolism in induced inflammatory conditions. This study used lipopolysaccharide (LPS)- or high-glucose-induced inflammation conditions in THP-1 cells to study how iron/heme metabolism participates in inflammatory responses. Here, we used iron and heme assays for measuring total iron and heme. We also used flow cytometry and Western blotting to analyze molecular responses. Our results demonstrated that adding LPS or high-glucose induced iron formation and heme synthesis and elevated the expression levels of proteins responsible for iron metabolism and heme synthesis. We then found that further addition of heme or 5-aminolevulinic acid (ALA) increased heme biosynthesis and promoted inflammatory responses by upregulating TLR4/NF-κB and inflammatory cytokine expressions. We also demonstrated the inhibition of heme synthesis using succinylacetone (SA). Moreover, N-MMP inhibited LPS- or high-glucose-induced inflammatory responses by inhibiting TLR4/NF-κB signaling. Hence, iron/heme metabolism checkpoints could be considered a target for treating inflammatory conditions.
Collapse
Affiliation(s)
- Dong Young Kang
- Department of Pathology, Institute of Biomedical Science and Technology, School of Medicine, Konkuk University, Chungju 27478, Korea; (D.Y.K.); (N.S.)
| | - Nipin Sp
- Department of Pathology, Institute of Biomedical Science and Technology, School of Medicine, Konkuk University, Chungju 27478, Korea; (D.Y.K.); (N.S.)
| | - Eun Seong Jo
- Pharmacological Research Division, National Institute of Food and Drug Safety Evaluation, Osong Health Technology Administration Complex, Cheongju-si 28159, Korea; (E.S.J.); (J.-M.L.)
| | - Jin-Moo Lee
- Pharmacological Research Division, National Institute of Food and Drug Safety Evaluation, Osong Health Technology Administration Complex, Cheongju-si 28159, Korea; (E.S.J.); (J.-M.L.)
| | - Kyoung-Jin Jang
- Department of Pathology, Institute of Biomedical Science and Technology, School of Medicine, Konkuk University, Chungju 27478, Korea; (D.Y.K.); (N.S.)
- Correspondence: ; Tel.: +82-2-2030-7839
| |
Collapse
|
22
|
Dietz JV, Fox JL, Khalimonchuk O. Down the Iron Path: Mitochondrial Iron Homeostasis and Beyond. Cells 2021; 10:cells10092198. [PMID: 34571846 PMCID: PMC8468894 DOI: 10.3390/cells10092198] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 08/22/2021] [Accepted: 08/23/2021] [Indexed: 12/20/2022] Open
Abstract
Cellular iron homeostasis and mitochondrial iron homeostasis are interdependent. Mitochondria must import iron to form iron–sulfur clusters and heme, and to incorporate these cofactors along with iron ions into mitochondrial proteins that support essential functions, including cellular respiration. In turn, mitochondria supply the cell with heme and enable the biogenesis of cytosolic and nuclear proteins containing iron–sulfur clusters. Impairment in cellular or mitochondrial iron homeostasis is deleterious and can result in numerous human diseases. Due to its reactivity, iron is stored and trafficked through the body, intracellularly, and within mitochondria via carefully orchestrated processes. Here, we focus on describing the processes of and components involved in mitochondrial iron trafficking and storage, as well as mitochondrial iron–sulfur cluster biogenesis and heme biosynthesis. Recent findings and the most pressing topics for future research are highlighted.
Collapse
Affiliation(s)
- Jonathan V. Dietz
- Department of Biochemistry, University of Nebraska, Lincoln, NE 68588, USA;
| | - Jennifer L. Fox
- Department of Chemistry and Biochemistry, College of Charleston, Charleston, SC 29424, USA;
| | - Oleh Khalimonchuk
- Department of Biochemistry, University of Nebraska, Lincoln, NE 68588, USA;
- Nebraska Redox Biology Center, University of Nebraska, Lincoln, NE 68588, USA
- Fred and Pamela Buffett Cancer Center, Omaha, NE 68198, USA
- Correspondence:
| |
Collapse
|
23
|
Aryankalayil MJ, Martello S, Bylicky MA, Chopra S, May JM, Shankardass A, MacMillan L, Sun L, Sanjak J, Vanpouille-Box C, Eke I, Coleman CN. Analysis of lncRNA-miRNA-mRNA expression pattern in heart tissue after total body radiation in a mouse model. J Transl Med 2021; 19:336. [PMID: 34364390 PMCID: PMC8349067 DOI: 10.1186/s12967-021-02998-w] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 07/23/2021] [Indexed: 12/14/2022] Open
Abstract
Background Radiation therapy is integral to effective thoracic cancer treatments, but its application is limited by sensitivity of critical organs such as the heart. The impacts of acute radiation-induced damage and its chronic effects on normal heart cells are highly relevant in radiotherapy with increasing lifespans of patients. Biomarkers for normal tissue damage after radiation exposure, whether accidental or therapeutic, are being studied as indicators of both acute and delayed effects. Recent research has highlighted the potential importance of RNAs, including messenger RNAs (mRNAs), microRNAs (miRNAs), and long non-coding RNAs (lncRNAs) as biomarkers to assess radiation damage. Understanding changes in mRNA and non-coding RNA expression will elucidate biological pathway changes after radiation. Methods To identify significant expression changes in mRNAs, lncRNAs, and miRNAs, we performed whole transcriptome microarray analysis of mouse heart tissue at 48 h after whole-body irradiation with 1, 2, 4, 8, and 12 Gray (Gy). We also validated changes in specific lncRNAs through RT-qPCR. Ingenuity Pathway Analysis (IPA) was used to identify pathways associated with gene expression changes. Results We observed sustained increases in lncRNAs and mRNAs, across all doses of radiation. Alas2, Aplnr, and Cxc3r1 were the most significantly downregulated mRNAs across all doses. Among the significantly upregulated mRNAs were cell-cycle arrest biomarkers Gdf15, Cdkn1a, and Ckap2. Additionally, IPA identified significant changes in gene expression relevant to senescence, apoptosis, hemoglobin synthesis, inflammation, and metabolism. LncRNAs Abhd11os, Pvt1, Trp53cor1, and Dino showed increased expression with increasing doses of radiation. We did not observe any miRNAs with sustained up- or downregulation across all doses, but miR-149-3p, miR-6538, miR-8101, miR-7118-5p, miR-211-3p, and miR-3960 were significantly upregulated after 12 Gy. Conclusions Radiation-induced RNA expression changes may be predictive of normal tissue toxicities and may indicate targetable pathways for radiation countermeasure development and improved radiotherapy treatment plans. Supplementary Information The online version contains supplementary material available at 10.1186/s12967-021-02998-w.
Collapse
Affiliation(s)
- Molykutty J Aryankalayil
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 10 Center Drive, Room B3B406, Bethesda, MD, 20892, USA.
| | - Shannon Martello
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 10 Center Drive, Room B3B406, Bethesda, MD, 20892, USA
| | - Michelle A Bylicky
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 10 Center Drive, Room B3B406, Bethesda, MD, 20892, USA
| | - Sunita Chopra
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 10 Center Drive, Room B3B406, Bethesda, MD, 20892, USA
| | - Jared M May
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 10 Center Drive, Room B3B406, Bethesda, MD, 20892, USA
| | - Aman Shankardass
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 10 Center Drive, Room B3B406, Bethesda, MD, 20892, USA
| | | | - Landy Sun
- Gryphon Scientific, Takoma Park, MD, 20912, USA
| | | | | | - Iris Eke
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 10 Center Drive, Room B3B406, Bethesda, MD, 20892, USA.,Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - C Norman Coleman
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 10 Center Drive, Room B3B406, Bethesda, MD, 20892, USA.,Radiation Research Program, National Cancer Institute, National Institutes of Health, Rockville, MD, 20850, USA
| |
Collapse
|
24
|
Zhu L, Wang L, Fan X, Dong C, Wang G, Wang Z. Chronic exposure to Bisphenol A resulted in alterations of reproductive functions via immune defense, oxidative damage and disruption DNA/histone methylation in male rare minnow Gobiocypris rarus. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2021; 236:105849. [PMID: 34010735 DOI: 10.1016/j.aquatox.2021.105849] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 03/28/2021] [Accepted: 04/26/2021] [Indexed: 06/12/2023]
Abstract
Bisphenol A (BPA) is a widely used chemical that represents a reproductive hazard in fish. However, the molecular pathways mediating reproductive toxicity under chronic BPA exposure remain unclear. To study the reproductive hazards associated with chronic BPA exposure, adult male rare minnows (Gobiocypris rarus) were treated with 15 μg L - 1 and 225 μg L - 1 BPA for 90 days. Results showed that chronic BPA treatment induced reproductive impairments with decreased fertilization capacity and movement time of sperm. Transcriptome analysis indicated 1421 transcripts that were differentially expressed in response to BPA exposure, which are involved in the biological process of oxidative stress, immune responses and DNA/histone methylation. BPA caused the oxidative stress via significantly increasing hydrogen peroxide (H2O2) levels and inhibiting the activities of antioxidant-related enzymes (Catalase, CAT). BPA caused an inflammatory response in the testes by significantly increasing IL-1β levels and inducing infiltration of inflammatory cells. Moreover, exposure to 15 μg L - 1 BPA significantly decreased the genomic DNA methylation level. These data revealed that chronic BPA exposure had adverse effects on male reproduction. Oxidative stress, inflammatory response and DNA/histone methylation might account for the decreased sperm quality.
Collapse
Affiliation(s)
- Long Zhu
- College of Animal Science and Technology, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100 China
| | - Lihong Wang
- College of Animal Science and Technology, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100 China
| | - Xiaoteng Fan
- College of Animal Science and Technology, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100 China
| | - Chenglong Dong
- College of Animal Science and Technology, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100 China
| | - Gaoxue Wang
- College of Animal Science and Technology, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100 China..
| | - Zaizhao Wang
- College of Animal Science and Technology, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100 China..
| |
Collapse
|
25
|
Ito J, Omiya S, Rusu MC, Ueda H, Murakawa T, Tanada Y, Abe H, Nakahara K, Asahi M, Taneike M, Nishida K, Shah AM, Otsu K. Iron derived from autophagy-mediated ferritin degradation induces cardiomyocyte death and heart failure in mice. eLife 2021; 10:e62174. [PMID: 33526170 PMCID: PMC7853718 DOI: 10.7554/elife.62174] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Accepted: 01/08/2021] [Indexed: 12/29/2022] Open
Abstract
Heart failure is a major public health problem, and abnormal iron metabolism is common in patients with heart failure. Although iron is necessary for metabolic homeostasis, it induces a programmed necrosis. Iron release from ferritin storage is through nuclear receptor coactivator 4 (NCOA4)-mediated autophagic degradation, known as ferritinophagy. However, the role of ferritinophagy in the stressed heart remains unclear. Deletion of Ncoa4 in mouse hearts reduced left ventricular chamber size and improved cardiac function along with the attenuation of the upregulation of ferritinophagy-mediated ferritin degradation 4 weeks after pressure overload. Free ferrous iron overload and increased lipid peroxidation were suppressed in NCOA4-deficient hearts. A potent inhibitor of lipid peroxidation, ferrostatin-1, significantly mitigated the development of pressure overload-induced dilated cardiomyopathy in wild-type mice. Thus, the activation of ferritinophagy results in the development of heart failure, whereas inhibition of this process protects the heart against hemodynamic stress.
Collapse
Affiliation(s)
- Jumpei Ito
- The School of Cardiovascular Medicine and Sciences, King’s College London British Heart Foundation Centre of ExcellenceLondonUnited Kingdom
- Department of Pharmacology, Faculty of Medicine, Osaka Medical CollegeOsakaJapan
| | - Shigemiki Omiya
- The School of Cardiovascular Medicine and Sciences, King’s College London British Heart Foundation Centre of ExcellenceLondonUnited Kingdom
| | - Mara-Camelia Rusu
- The School of Cardiovascular Medicine and Sciences, King’s College London British Heart Foundation Centre of ExcellenceLondonUnited Kingdom
| | - Hiromichi Ueda
- Department of Cardiovascular Medicine, Graduate School of Medicine, Osaka UniversityOsakaJapan
| | - Tomokazu Murakawa
- The School of Cardiovascular Medicine and Sciences, King’s College London British Heart Foundation Centre of ExcellenceLondonUnited Kingdom
| | - Yohei Tanada
- The School of Cardiovascular Medicine and Sciences, King’s College London British Heart Foundation Centre of ExcellenceLondonUnited Kingdom
| | - Hajime Abe
- The School of Cardiovascular Medicine and Sciences, King’s College London British Heart Foundation Centre of ExcellenceLondonUnited Kingdom
| | - Kazuki Nakahara
- The School of Cardiovascular Medicine and Sciences, King’s College London British Heart Foundation Centre of ExcellenceLondonUnited Kingdom
| | - Michio Asahi
- Department of Pharmacology, Faculty of Medicine, Osaka Medical CollegeOsakaJapan
| | - Manabu Taneike
- The School of Cardiovascular Medicine and Sciences, King’s College London British Heart Foundation Centre of ExcellenceLondonUnited Kingdom
- Department of Cardiovascular Medicine, Graduate School of Medicine, Osaka UniversityOsakaJapan
| | - Kazuhiko Nishida
- The School of Cardiovascular Medicine and Sciences, King’s College London British Heart Foundation Centre of ExcellenceLondonUnited Kingdom
| | - Ajay M Shah
- The School of Cardiovascular Medicine and Sciences, King’s College London British Heart Foundation Centre of ExcellenceLondonUnited Kingdom
| | - Kinya Otsu
- The School of Cardiovascular Medicine and Sciences, King’s College London British Heart Foundation Centre of ExcellenceLondonUnited Kingdom
| |
Collapse
|
26
|
Gbotosho OT, Kapetanaki MG, Kato GJ. The Worst Things in Life are Free: The Role of Free Heme in Sickle Cell Disease. Front Immunol 2021; 11:561917. [PMID: 33584641 PMCID: PMC7873693 DOI: 10.3389/fimmu.2020.561917] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 12/04/2020] [Indexed: 12/15/2022] Open
Abstract
Hemolysis is a pathological feature of several diseases of diverse etiology such as hereditary anemias, malaria, and sepsis. A major complication of hemolysis involves the release of large quantities of hemoglobin into the blood circulation and the subsequent generation of harmful metabolites like labile heme. Protective mechanisms like haptoglobin-hemoglobin and hemopexin-heme binding, and heme oxygenase-1 enzymatic degradation of heme limit the toxicity of the hemolysis-related molecules. The capacity of these protective systems is exceeded in hemolytic diseases, resulting in high residual levels of hemolysis products in the circulation, which pose a great oxidative and proinflammatory risk. Sickle cell disease (SCD) features a prominent hemolytic anemia which impacts the phenotypic variability and disease severity. Not only is circulating heme a potent oxidative molecule, but it can act as an erythrocytic danger-associated molecular pattern (eDAMP) molecule which contributes to a proinflammatory state, promoting sickle complications such as vaso-occlusion and acute lung injury. Exposure to extracellular heme in SCD can also augment the expression of placental growth factor (PlGF) and interleukin-6 (IL-6), with important consequences to enthothelin-1 (ET-1) secretion and pulmonary hypertension, and potentially the development of renal and cardiac dysfunction. This review focuses on heme-induced mechanisms that are implicated in disease pathways, mainly in SCD. A special emphasis is given to heme-induced PlGF and IL-6 related mechanisms and their role in SCD disease progression.
Collapse
Affiliation(s)
- Oluwabukola T. Gbotosho
- Division of Hematology-Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Maria G. Kapetanaki
- Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Gregory J. Kato
- Division of Hematology-Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
- Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| |
Collapse
|
27
|
Yegorova S, Yegorov O, Ferreira LF. RNA-sequencing reveals transcriptional signature of pathological remodeling in the diaphragm of rats after myocardial infarction. Gene 2020; 770:145356. [PMID: 33333219 DOI: 10.1016/j.gene.2020.145356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 11/11/2020] [Accepted: 12/01/2020] [Indexed: 12/21/2022]
Abstract
The diaphragm is the main inspiratory muscle, and the chronic phase post-myocardial infarction (MI) is characterized by diaphragm morphological, contractile, and metabolic abnormalities. However, the mechanisms of diaphragm weakness are not fully understood. In the current study, we aimed to identify the transcriptome changes associated with diaphragm abnormalities in the chronic stage MI. We ligated the left coronary artery to cause MI in rats and performed RNA-sequencing (RNA-Seq) in diaphragm samples 16 weeks post-surgery. The sham group underwent thoracotomy and pericardiotomy but no artery ligation. We identified 112 differentially expressed genes (DEGs) out of a total of 9664 genes. Myocardial infarction upregulated and downregulated 42 and 70 genes, respectively. Analysis of DEGs in the framework of skeletal muscle-specific biological networks suggest remodeling in the neuromuscular junction, extracellular matrix, sarcomere, cytoskeleton, and changes in metabolism and iron homeostasis. Overall, the data are consistent with pathological remodeling of the diaphragm and reveal potential biological targets to prevent diaphragm weakness in the chronic stage MI.
Collapse
Affiliation(s)
- Svetlana Yegorova
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL 32611, USA.
| | - Oleg Yegorov
- Department of Neurosurgery, University of Florida, Gainesville, FL 32611, USA.
| | - Leonardo F Ferreira
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL 32611, USA.
| |
Collapse
|
28
|
Martinez M, Fendley GA, Saxberg AD, Zoghbi ME. Stimulation of the human mitochondrial transporter ABCB10 by zinc-mesoporphrin. PLoS One 2020; 15:e0238754. [PMID: 33253225 PMCID: PMC7703921 DOI: 10.1371/journal.pone.0238754] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 11/06/2020] [Indexed: 11/19/2022] Open
Abstract
Heme biosynthesis occurs through a series of reactions that take place within the cytoplasm and mitochondria, so intermediates need to move across these cellular compartments. However, the specific membrane transport mechanisms involved in the process are not yet identified. The ATP-binding cassette protein ABCB10 is essential for normal heme production, as knocking down this transporter in mice is embryonically lethal and accompanied by severe anemia plus oxidative damage. The role of ABCB10 is unknown, but given its location in the inner mitochondrial membrane, it has been proposed as a candidate to export either an early heme precursor or heme. Alternatively, ABCB10 might transport a molecule important for protection against oxidative damage. To help discern between these possibilities, we decided to study the effect of heme analogs, precursors, and antioxidant peptides on purified human ABCB10. Since substrate binding increases the ATP hydrolysis rate of ABC transporters, we have determined the ability of these molecules to activate purified ABCB10 reconstituted in lipid nanodiscs using ATPase measurements. Under our experimental conditions, we found that the only heme analog increasing ABCB10 ATPase activity was Zinc-mesoporphyrin. This activation of almost seventy percent was specific for ABCB10, as the ATPase activity of a negative control bacterial ABC transporter was not affected. The activation was also observed in cysteine-less ABCB10, suggesting that Zinc-mesoporphyrin's effect did not require binding to typical heme regulatory motifs. Furthermore, our data indicate that ABCB10 was not directly activated by neither the early heme precursor delta-aminolevulinic acid nor glutathione, downsizing their relevance as putative substrates for this transporter. Although additional studies are needed to determine the physiological substrate of ABCB10, our findings reveal Zinc-mesoporphyrin as the first tool compound to directly modulate ABCB10 activity and raise the possibility that some actions of Zinc-mesoporphyrin in cellular and animal studies could be mediated by ABCB10.
Collapse
Affiliation(s)
- Melissa Martinez
- Department of Molecular Cell Biology, School of Natural Sciences, University of California Merced, Merced, California, United States of America
| | - Gregory A. Fendley
- Department of Molecular Cell Biology, School of Natural Sciences, University of California Merced, Merced, California, United States of America
| | - Alexandra D. Saxberg
- Department of Molecular Cell Biology, School of Natural Sciences, University of California Merced, Merced, California, United States of America
| | - Maria E. Zoghbi
- Department of Molecular Cell Biology, School of Natural Sciences, University of California Merced, Merced, California, United States of America
| |
Collapse
|
29
|
Che J, Yang J, Zhao B, Zhang G, Wang L, Peng S, Shang P. The Effect of Abnormal Iron Metabolism on Osteoporosis. Biol Trace Elem Res 2020; 195:353-365. [PMID: 31473898 DOI: 10.1007/s12011-019-01867-4] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 08/08/2019] [Indexed: 12/16/2022]
Abstract
Iron is one of the important trace elements in life activities. Abnormal iron metabolism increases the incidence of many skeletal diseases, especially for osteoporosis. Iron metabolism plays a key role in the bone homeostasis. Disturbance of iron metabolism not only promotes osteoclast differentiation and apoptosis of osteoblasts but also inhibits proliferation and differentiation of osteoblasts, which eventually destroys the balance of bone remodeling. The strength and density of bone can be weakened by the disordered iron metabolism, which increases the incidence of osteoporosis. Clinically, compounds or drugs that regulate iron metabolism are used for the treatment of osteoporosis. The goal of this review summarizes the new progress on the effect of iron overload or deficiency on osteoporosis and the mechanism of disordered iron metabolism on osteoporosis. Explaining the relationship of iron metabolism with osteoporosis may provide ideas for clinical treatment and development of new drugs.
Collapse
Affiliation(s)
- Jingmin Che
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, 518057, Guangdong, China
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, China
- Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, China
| | - Jiancheng Yang
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, China
- Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, China
| | - Bin Zhao
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, China
- Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, China
| | - Ge Zhang
- Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, SAR, China
| | - Luyao Wang
- Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, SAR, China
| | - Songlin Peng
- Department of Spine Surgery, Shenzhen People's Hospital, Shenzhen, 518000, Guangdong, China
| | - Peng Shang
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, 518057, Guangdong, China.
- Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, China.
| |
Collapse
|
30
|
Abstract
Iron deficiency or overload poses an increasingly complex issue in cardiovascular disease, especially heart failure. The potential benefits and side effects of iron supplementation are still a matter of concern, even though current guidelines suggest therapeutic management of iron deficiency. In this review, we sought to examine the iron metabolism and to identify the rationale behind iron supplementation and iron chelation. Cardiovascular disease is increasingly linked with iron dysmetabolism, with an increased proportion of heart failure patients being affected by decreased plasma iron levels and in turn, by the decreased quality of life. Multiple studies have concluded on a benefit of iron administration, even if just for symptomatic relief. However, new studies field evidence for negative effects of dysregulated non-bound iron and its reactive oxygen species production, with concern to heart diseases. The molecular targets of iron usage, such as the mitochondria, are prone to deleterious effects of the polyvalent metal, added by the scarcely described processes of iron elimination. Iron supplementation and iron chelation show promise of therapeutic benefit in heart failure, with the extent and mechanisms of both prospects not being entirely understood. It may be that a state of decreased systemic and increased mitochondrial iron levels proves to be a useful frame for future advancements in understanding the interconnection of heart failure and iron metabolism.
Collapse
|
31
|
Wang L, Vijayan V, Jang MS, Thorenz A, Greite R, Rong S, Chen R, Shushakova N, Tudorache I, Derlin K, Pradhan P, Madyaningrana K, Madrahimov N, Bräsen JH, Lichtinghagen R, van Kooten C, Huber-Lang M, Haller H, Immenschuh S, Gueler F. Labile Heme Aggravates Renal Inflammation and Complement Activation After Ischemia Reperfusion Injury. Front Immunol 2019; 10:2975. [PMID: 31921212 PMCID: PMC6933315 DOI: 10.3389/fimmu.2019.02975] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 12/04/2019] [Indexed: 01/02/2023] Open
Abstract
Background: Ischemia reperfusion injury (IRI) plays a major role in solid organ transplantation. The length of warm ischemia time is critical for the extent of tissue damage in renal IRI. In this experimental study we hypothesized that local release of labile heme in renal tissue is triggered by the duration of warm ischemia (15 vs. 45 min IRI) and mediates complement activation, cytokine release, and inflammation. Methods: To induce IRI, renal pedicle clamping was performed in male C57BL/6 mice for short (15 min) or prolonged (45 min) time periods. Two and 24 h after experimental ischemia tissue injury labile heme levels in the kidney were determined with an apo-horseradish peroxidase assay. Moreover, renal injury, cytokines, and C5a and C3a receptor (C5aR, C3aR) expression were determined by histology, immunohistochemistry and qPCR, respectively. In addition, in vitro studies stimulating bone marrow-derived macrophages with LPS and the combination of LPS and heme were performed and cytokine expression was measured. Results: Inflammation and local tissue injury correlated with the duration of warm ischemia time. Labile heme concentrations in renal tissue were significantly higher after prolonged (45 min) as compared to short (15 min) IRI. Notably, expression of the inducible heme-degrading enzyme heme oxygenase-1 (HO-1) was up-regulated in kidneys after prolonged, but not after short IRI. C5aR, the pro-inflammatory cytokines IL-6 and TNF-α as well as pERK were up-regulated after prolonged, but not after short ischemia times. Consecutively, neutrophil infiltration and up-regulation of pro-fibrotic cytokines such as CTGF and PAI were more pronounced in prolonged IRI in comparison to short IRI. In vitro stimulation of macrophages with LPS revealed that IL-6 expression was enhanced in the presence of heme. Finally, administration of the heme scavenger human serum albumin (HSA) reduced the expression of pro-inflammatory cytokines, C3a receptor and improved tubular function indicated by enhanced alpha 1 microglobulin (A1M) absorption after IRI. Conclusions: Our data show that prolonged duration of warm ischemia time increased labile heme levels in the kidney, which correlates with IRI-dependent inflammation and up-regulation of anaphylatoxin receptor expression.
Collapse
Affiliation(s)
- Li Wang
- Department of Nephrology, Hannover Medical School, Hanover, Germany
| | - Vijith Vijayan
- Institute for Transfusion Medicine, Hannover Medical School, Hanover, Germany
| | - Mi-Sun Jang
- Department of Nephrology, Hannover Medical School, Hanover, Germany
| | - Anja Thorenz
- Department of Nephrology, Hannover Medical School, Hanover, Germany
| | - Robert Greite
- Department of Nephrology, Hannover Medical School, Hanover, Germany
| | - Song Rong
- Department of Nephrology, Hannover Medical School, Hanover, Germany
| | - Rongjun Chen
- Department of Nephrology, Hannover Medical School, Hanover, Germany
| | - Nelli Shushakova
- Department of Nephrology, Hannover Medical School, Hanover, Germany
| | - Igor Tudorache
- Department of Cardiothoracic Surgery, Hannover Medical School, Hanover, Germany
| | - Katja Derlin
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hanover, Germany
| | - Pooja Pradhan
- Institute for Transfusion Medicine, Hannover Medical School, Hanover, Germany
| | - Kukuh Madyaningrana
- Institute for Transfusion Medicine, Hannover Medical School, Hanover, Germany
| | - Nodir Madrahimov
- Department of Cardiothoracic Surgery, Hannover Medical School, Hanover, Germany
| | | | - Ralf Lichtinghagen
- Department of Laboratory Medicine, Hannover Medical School, Hanover, Germany
| | - Cees van Kooten
- Department of Nephrology, Leiden University Medical Centre, Leiden, Netherlands
| | - Markus Huber-Lang
- Institute of Clinical and Experimental Trauma-Immunology, University Hospital of Ulm, Ulm, Germany
| | - Hermann Haller
- Department of Nephrology, Hannover Medical School, Hanover, Germany
| | - Stephan Immenschuh
- Institute for Transfusion Medicine, Hannover Medical School, Hanover, Germany
| | - Faikah Gueler
- Department of Nephrology, Hannover Medical School, Hanover, Germany
| |
Collapse
|
32
|
Liu N, Zou L, Hu M, Zhang M. Heme as a target for protection against doxorubicin-induced apoptosis in H9c2 cardiomyocytes. Cell Stress Chaperones 2019; 24:1211-1217. [PMID: 31741235 PMCID: PMC6882980 DOI: 10.1007/s12192-019-01045-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 10/14/2019] [Accepted: 10/17/2019] [Indexed: 12/18/2022] Open
Abstract
Heme homeostasis is of vital importance to many biological processes associated with cell redox activity. However, the role of heme in the doxorubicin (DOX)-induced cardiotoxicity is still not clear. The aim of the present study was to test the hypothesis that heme is related to the DOX-induced oxidative stress and inhibition of heme expression may protect H9c2 cardiomyocytes against DOX-induced cardiotoxicity. For the evaluation of heme changing under doxorubicin treatment, H9c2 cells were treated with 0.5, 1, 2, and 4 mg/mL doxorubicin respectively. H9c2 cells were divided into 5 groups: Control group (cells were cultured without intervention), DOX group (cells were treated with 2 mg/mL doxorubicin for 6 h), Heme depletion+DOX group (cells were cultured with heme-depleted serum media, 0.5 mM succinylacetone and 2 mg/mL doxorubicin), Heme group (cells were treated with 30 μM heme), and Heme depletion+DOX+Heme group. Apoptotic cells were detected by flow cytometry with Annexin V-FITC/PI. The intracellular oxidant levels were measured by DCFH-DA fluorescence. The levels of heme were detected by ELISA. Doxorubicin significantly increased intracellular heme level from 5013 ± 187 ng/mL to the highest level of 11,720 ± 107 ng/mL, as well as the intracellular oxidants and cell apoptosis rate elevated by the increase of doxorubicin concentration. Heme depletion can significantly suppress the DOX-induced apoptosis from 39.8 ± 0.5% to 20.8 ± 0.5% (p < 0.001). Re-supplemented with exogenous heme partially but significantly restored the DOX-induced apoptosis. Heme plays an important role in doxorubicin toxicity-induced cardiomyocyte injury. By appropriate reduction in the accumulation of free heme in cardiomyocytes, doxorubicin-induced cardiotoxicity may be alleviated.
Collapse
Affiliation(s)
- Na Liu
- Clinical Laboratory Medicine, Beijing Shijitan Hospital, Capital Medical University, 10 Tieyi Road, Haidian District, Beijing, 100038, China
- Peking University Ninth School of Clinical Medicine, Beijing, China
- Beijing Key Laboratory of Urinary Cellular Molecular Diagnostics, Beijing, China
| | - Liangqiang Zou
- Clinical Laboratory Medicine, Beijing Shijitan Hospital, Capital Medical University, 10 Tieyi Road, Haidian District, Beijing, 100038, China
- Peking University Ninth School of Clinical Medicine, Beijing, China
- Beijing Key Laboratory of Urinary Cellular Molecular Diagnostics, Beijing, China
| | - Mei Hu
- Clinical Laboratory Medicine, Beijing Shijitan Hospital, Capital Medical University, 10 Tieyi Road, Haidian District, Beijing, 100038, China
- Peking University Ninth School of Clinical Medicine, Beijing, China
- Beijing Key Laboratory of Urinary Cellular Molecular Diagnostics, Beijing, China
| | - Man Zhang
- Clinical Laboratory Medicine, Beijing Shijitan Hospital, Capital Medical University, 10 Tieyi Road, Haidian District, Beijing, 100038, China.
- Peking University Ninth School of Clinical Medicine, Beijing, China.
- Beijing Key Laboratory of Urinary Cellular Molecular Diagnostics, Beijing, China.
| |
Collapse
|
33
|
Tang M, Huang Z, Luo X, Liu M, Wang L, Qi Z, Huang S, Zhong J, Chen JX, Li L, Wu D, Chen L. Ferritinophagy activation and sideroflexin1-dependent mitochondria iron overload is involved in apelin-13-induced cardiomyocytes hypertrophy. Free Radic Biol Med 2019; 134:445-457. [PMID: 30731113 DOI: 10.1016/j.freeradbiomed.2019.01.052] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 01/31/2019] [Accepted: 01/31/2019] [Indexed: 01/18/2023]
Abstract
Excess iron accumulation and cardiac oxidative stress have been shown as important mediators of cardiac hypertrophy, whereas it remains largely elusive about the occurrence of mitochondrial iron overload and its significance during cardiac hypertrophy. In the present study, we aim to investigate the role of NCOA4-mediated ferritinophagy and SFXN1-dependent mitochondria iron overload in apelin-13-induced cardiomyocytes hypertrophy. Apelin-13 significantly promotes ferric citrate (FAC)-induced total cellular and mitochondria ion production, as well as mitochondria ROS contents. Mechanistically, apelin-13 effectively induces the expression of SFXN1, a mitochondria iron transporting protein and NCOA4, a cargo receptor of ferritinophagy in dose and time-dependent manner. Conversely, blockade of APJ by F13A abolishes these stimulatory effects. In addition, apelin-13-triggered mitochondria iron overload is reversed by the genetic inhibition of SFXN1 and NCOA4. NCOA4 deficiency via its silencing also interferes with the enhanced expression of SFXN1 evoked by apelin-13. In apelin-13-treated H9c2 cells, the promotion in cell diameter, volume as well as protein contents are obviously suppressed by the knockdown of NCOA4 and SFXN1 with their corresponding siRNAs. Remarkably, the human and murine hypertrophic hearts models, as well as apelin-13-injected mice models, present evident cardiac mitochondrial iron deposition and raised expressions of NCOA4 and SFXN1. Taken together, these results provide experimental evidences that NCOA4-mediated ferritinophagy might be defined as an essential mechanism leading to apelin-13-cardiomyocytes hypertrophy in SFXN1-dependent mitochondria iron overload manners.
Collapse
Affiliation(s)
- Mingzhu Tang
- Institute of Pharmacy and Pharmacology, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Learning Key Laboratory for Pharmacoproteomics, University of South China, Hengyang, 421001, China
| | - Zhen Huang
- Institute of Pharmacy and Pharmacology, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Learning Key Laboratory for Pharmacoproteomics, University of South China, Hengyang, 421001, China
| | - Xuling Luo
- Institute of Pharmacy and Pharmacology, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Learning Key Laboratory for Pharmacoproteomics, University of South China, Hengyang, 421001, China
| | - Meiqing Liu
- Institute of Pharmacy and Pharmacology, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Learning Key Laboratory for Pharmacoproteomics, University of South China, Hengyang, 421001, China
| | - Lingzhi Wang
- Institute of Pharmacy and Pharmacology, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Learning Key Laboratory for Pharmacoproteomics, University of South China, Hengyang, 421001, China
| | - Zhihao Qi
- Institute of Pharmacy and Pharmacology, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Learning Key Laboratory for Pharmacoproteomics, University of South China, Hengyang, 421001, China
| | - Shifang Huang
- Institute of Pharmacy and Pharmacology, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Learning Key Laboratory for Pharmacoproteomics, University of South China, Hengyang, 421001, China
| | - Jiuchang Zhong
- Heart Center and Beijing Key Laboratory of Hypertension, Beijing Chaoyang Hospital Affiliated to Capital Medical University, Beijing, 100020, China
| | - Jian-Xiong Chen
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, USA
| | - Lanfang Li
- Institute of Pharmacy and Pharmacology, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Learning Key Laboratory for Pharmacoproteomics, University of South China, Hengyang, 421001, China.
| | - Di Wu
- Institute of Pharmacy and Pharmacology, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Learning Key Laboratory for Pharmacoproteomics, University of South China, Hengyang, 421001, China.
| | - Linxi Chen
- Institute of Pharmacy and Pharmacology, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Learning Key Laboratory for Pharmacoproteomics, University of South China, Hengyang, 421001, China.
| |
Collapse
|
34
|
Iron induces insulin resistance in cardiomyocytes via regulation of oxidative stress. Sci Rep 2019; 9:4668. [PMID: 30874600 PMCID: PMC6420583 DOI: 10.1038/s41598-019-41111-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 02/12/2019] [Indexed: 12/26/2022] Open
Abstract
Iron overload is associated with various pathological changes which contribute to heart failure. Here, we examined mechanisms via which iron alters cardiomyocyte insulin sensitivity. Treatment of primary adult and neonatal cardiomyocytes as well as H9c2 cells with iron decreased insulin sensitivity determined via Western blotting or immunofluorescent detection of Akt and p70S6K phosphorylation and glucose uptake. Using CellROX deep red or DCF-DA probes we also observed that iron increased generation of reactive oxygen species (ROS), and that pretreatment with the superoxide dismutase mimetic MnTBAP reduced ROS production and attenuated iron-induced insulin resistance. SKQ1 and allopurinol but not apocynin reduced iron-induced ROS suggesting mitochondria and xanthine oxidase contribute to cellular ROS in response to iron. Western blotting for LC3-I, LC3-II and P62 levels as well as immunofluorescent co-detection of autophagosomes with Cyto-ID and lysosomal cathepsin activity indicated that iron attenuated autophagic flux without altering total expression of Atg7 or beclin-1 and phosphorylation of mTORC1 and ULK1. This conclusion was reinforced via protein accumulation detected using Click-iT HPG labelling after iron treatment. The adiponectin receptor agonist AdipoRon increased autophagic flux and improved insulin sensitivity both alone and in the presence of iron. We created an autophagy-deficient cell model by overexpressing a dominant-negative Atg5 mutant in H9c2 cells and this confirmed that reduced autophagy flux correlated with less insulin sensitivity. In conclusion, our study showed that iron promoted a cascade of ROS production, reduced autophagy and insulin resistance in cardiomyocytes.
Collapse
|
35
|
Fanter CE, Lin Z, Keenan SW, Janzen FJ, Mitchell TS, Warren DE. Development-specific transcriptomic profiling suggests new mechanisms for anoxic survival in the ventricle of overwintering turtles. J Exp Biol 2019; 223:jeb.213918. [DOI: 10.1242/jeb.213918] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 12/18/2019] [Indexed: 12/28/2022]
Abstract
Oxygen deprivation swiftly damages tissues in most animals, yet some species show remarkable abilities to tolerate little or even no oxygen. Painted turtles exhibit a development-dependent tolerance that allows adults to survive anoxia ∼4x longer than hatchlings: adults survive ∼170 days and hatchlings survive ∼40 days at 3°C. We hypothesized this difference is related to development-dependent differences in ventricular gene expression. Using a comparative ontogenetic approach, we examined whole transcriptomic changes before, during, and five days after a 20-day bout of anoxic submergence at 3°C. Ontogeny accounted for more gene expression differences than treatment (anoxia or recovery): 1,175 vs. 237 genes, respectively. Of the 237 differences, 93 could confer protection against anoxia and reperfusion injury, 68 could be injurious, and 20 may be constitutively protective. Especially striking during anoxia was the expression pattern of all 76 annotated ribosomal protein (R-protein) mRNAs, which decreased in anoxia-tolerant adults, but increased in anoxia-sensitive hatchlings, suggesting adult-specific regulation of translational suppression. These genes, along with 60 others that decreased their levels in adults and either increased or remained unchanged in hatchlings, implicate antagonistic pleiotropy as a mechanism to resolve the long-standing question about why hatchling painted turtles overwinter in terrestrial nests, rather than emerge and overwinter in water during their first year. In sum, developmental differences in the transcriptome of the turtle ventricle revealed potentially protective mechanisms that contribute to extraordinary adult-specific anoxia tolerance, and provide a unique perspective on differences between the anoxia-induced molecular responses of anoxia-tolerant or anoxia-sensitive phenotypes within a species.
Collapse
Affiliation(s)
- Cornelia E. Fanter
- Saint Louis University, Department of Biology, 3507 Laclede Ave., St. Louis, Missouri, 63103, USA
| | - Zhenguo Lin
- Saint Louis University, Department of Biology, 3507 Laclede Ave., St. Louis, Missouri, 63103, USA
| | - Sarah W. Keenan
- South Dakota School of Mines & Technology, Department of Geology and Geological Engineering, 501 East St. Joseph St., Rapid City, South Dakota, 57701, USA
| | - Fredric J. Janzen
- Iowa State University, Department of Ecology, Evolution and Organismal Biology, 251 Bessey Hall, Ames, Iowa, 50011, USA
| | - Timothy S. Mitchell
- University of Minnesota, Department of Ecology, Evolution and Behavior, 1479 Gortner Ave. Saint Paul, MN, 55108, USA
| | - Daniel E. Warren
- Saint Louis University, Department of Biology, 3507 Laclede Ave., St. Louis, Missouri, 63103, USA
| |
Collapse
|
36
|
Abstract
Mitochondria are an iconic distinguishing feature of eukaryotic cells. Mitochondria encompass an active organellar network that fuses, divides, and directs a myriad of vital biological functions, including energy metabolism, cell death regulation, and innate immune signaling in different tissues. Another crucial and often underappreciated function of these dynamic organelles is their central role in the metabolism of the most abundant and biologically versatile transition metals in mammalian cells, iron. In recent years, cellular and animal models of mitochondrial iron dysfunction have provided vital information in identifying new proteins that have elucidated the pathways involved in mitochondrial homeostasis and iron metabolism. Specific signatures of mitochondrial iron dysregulation that are associated with disease pathogenesis and/or progression are becoming increasingly important. Understanding the molecular mechanisms regulating mitochondrial iron pathways will help better define the role of this important metal in mitochondrial function and in human health and disease.
Collapse
Affiliation(s)
- Diane M Ward
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah 84112, USA
| | - Suzanne M Cloonan
- Division of Pulmonary and Critical Care Medicine, Weill Cornell Medicine, New York, NY 10065, USA;
| |
Collapse
|
37
|
Gas Signaling Molecules and Mitochondrial Potassium Channels. Int J Mol Sci 2018; 19:ijms19103227. [PMID: 30340432 PMCID: PMC6214077 DOI: 10.3390/ijms19103227] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 10/15/2018] [Accepted: 10/16/2018] [Indexed: 12/27/2022] Open
Abstract
Recently, gaseous signaling molecules, such as carbon monoxide (CO), nitric oxide (NO), and hydrogen sulfide (H2S), which were previously considered to be highly toxic, have been of increasing interest due to their beneficial effects at low concentrations. These so-called gasotransmitters affect many cellular processes, such as apoptosis, proliferation, cytoprotection, oxygen sensing, ATP synthesis, and cellular respiration. It is thought that mitochondria, specifically their respiratory complexes, constitute an important target for these gases. On the other hand, increasing evidence of a cytoprotective role for mitochondrial potassium channels provides motivation for the analysis of the role of gasotransmitters in the regulation of channel function. A number of potassium channels have been shown to exhibit activity within the inner mitochondrial membrane, including ATP-sensitive potassium channels, Ca2+-activated potassium channels, voltage-gated Kv potassium channels, and TWIK-related acid-sensitive K+ channel 3 (TASK-3). The effects of these channels include the regulation of mitochondrial respiration and membrane potential. Additionally, they may modulate the synthesis of reactive oxygen species within mitochondria. The opening of mitochondrial potassium channels is believed to induce cytoprotection, while channel inhibition may facilitate cell death. The molecular mechanisms underlying the action of gasotransmitters are complex. In this review, we focus on the molecular mechanisms underlying the action of H2S, NO, and CO on potassium channels present within mitochondria.
Collapse
|
38
|
Chang HC, Shapiro JS, Ardehali H. Getting to the "Heart" of Cardiac Disease by Decreasing Mitochondrial Iron. Circ Res 2018; 119:1164-1166. [PMID: 28051781 DOI: 10.1161/circresaha.116.309746] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Hsiang-Chun Chang
- From the Feinberg Cardiovascular Research Institute, Northwestern University, Chicago, IL
| | - Jason S Shapiro
- From the Feinberg Cardiovascular Research Institute, Northwestern University, Chicago, IL
| | - Hossein Ardehali
- From the Feinberg Cardiovascular Research Institute, Northwestern University, Chicago, IL.
| |
Collapse
|
39
|
Ben Hamda C, Sangeda R, Mwita L, Meintjes A, Nkya S, Panji S, Mulder N, Guizani-Tabbane L, Benkahla A, Makani J, Ghedira K. A common molecular signature of patients with sickle cell disease revealed by microarray meta-analysis and a genome-wide association study. PLoS One 2018; 13:e0199461. [PMID: 29979707 PMCID: PMC6034806 DOI: 10.1371/journal.pone.0199461] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 06/07/2018] [Indexed: 12/16/2022] Open
Abstract
A chronic inflammatory state to a large extent explains sickle cell disease (SCD) pathophysiology. Nonetheless, the principal dysregulated factors affecting this major pathway and their mechanisms of action still have to be fully identified and elucidated. Integrating gene expression and genome-wide association study (GWAS) data analysis represents a novel approach to refining the identification of key mediators and functions in complex diseases. Here, we performed gene expression meta-analysis of five independent publicly available microarray datasets related to homozygous SS patients with SCD to identify a consensus SCD transcriptomic profile. The meta-analysis conducted using the MetaDE R package based on combining p values (maxP approach) identified 335 differentially expressed genes (DEGs; 224 upregulated and 111 downregulated). Functional gene set enrichment revealed the importance of several metabolic pathways, of innate immune responses, erythrocyte development, and hemostasis pathways. Advanced analyses of GWAS data generated within the framework of this study by means of the atSNP R package and SIFT tool identified 60 regulatory single-nucleotide polymorphisms (rSNPs) occurring in the promoter of 20 DEGs and a deleterious SNP, affecting CAMKK2 protein function. This novel database of candidate genes, transcription factors, and rSNPs associated with SCD provides new markers that may help to identify new therapeutic targets.
Collapse
Affiliation(s)
- Cherif Ben Hamda
- Laboratory of Bioinformatics, Biomathematics and Biostatistics, Institute Pasteur of Tunis, Tunis, Tunisia
- University of Tunis El Manar, Tunis, Tunisia
- Faculty of Science of Bizerte, Jarzouna, University of Carthage, Tunisia
- * E-mail: (KG); (CBH)
| | - Raphael Sangeda
- Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Liberata Mwita
- Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | | | - Siana Nkya
- Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Sumir Panji
- University of Cape Town, Cape Town, South Africa
| | | | - Lamia Guizani-Tabbane
- University of Tunis El Manar, Tunis, Tunisia
- Laboratory of Medical Parasitology, Biotechnology and Biomolecules, Institute Pasteur of Tunis, Tunis, Tunisia
| | - Alia Benkahla
- Laboratory of Bioinformatics, Biomathematics and Biostatistics, Institute Pasteur of Tunis, Tunis, Tunisia
- University of Tunis El Manar, Tunis, Tunisia
| | - Julie Makani
- Faculty of Science of Bizerte, Jarzouna, University of Carthage, Tunisia
| | - Kais Ghedira
- Laboratory of Bioinformatics, Biomathematics and Biostatistics, Institute Pasteur of Tunis, Tunis, Tunisia
- University of Tunis El Manar, Tunis, Tunisia
- * E-mail: (KG); (CBH)
| | | |
Collapse
|
40
|
Adeno-Associated Virus Gene Therapy: Translational Progress and Future Prospects in the Treatment of Heart Failure. Heart Lung Circ 2018; 27:1285-1300. [PMID: 29703647 DOI: 10.1016/j.hlc.2018.03.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 03/03/2018] [Indexed: 02/06/2023]
Abstract
Despite advances in treatment over the past decade, heart failure remains a significant public health burden and a leading cause of death in the developed world. Gene therapy provides a promising approach for preventing and reversing cardiac abnormalities, however, clinical application has shown limited success to date. A substantial effort is being invested into the development of recombinant adeno-associated viruses (AAVs) for cardiac gene therapy as AAV gene therapy offers a high safety profile and provides sustained and efficient transgene expression following a once-off administration. Due to the physiological, anatomical and genetic similarities between large animals and humans, preclinical studies using large animal models for AAV gene therapy are crucial stepping stones between the laboratory and the clinic. Many molecular targets selected to treat heart failure using AAV gene therapy have been chosen because of their potential to regulate and restore cardiac contractility. Other genes targeted with AAV are involved with regulating angiogenesis, beta-adrenergic sensitivity, inflammation, physiological signalling and metabolism. While significant progress continues to be made in the field of AAV cardiac gene therapy, challenges remain in overcoming host neutralising antibodies, improving AAV vector cardiac-transduction efficiency and selectivity, and optimising the dose, route and method of delivery.
Collapse
|
41
|
Lu Y, Meng X, Wang L, Wang X. Analysis of long non-coding RNA expression profiles identifies functional lncRNAs associated with the progression of acute coronary syndromes. Exp Ther Med 2017; 15:1376-1384. [PMID: 29434722 PMCID: PMC5774440 DOI: 10.3892/etm.2017.5573] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 05/11/2017] [Indexed: 12/30/2022] Open
Abstract
It has been demonstrated that long non-coding RNAs (lncRNAs) are important in the gene regulatory network and their dysregulated expression has been implicated in cardiovascular disease. However, little is known regarding lncRNA expression patterns and their function in the progression of acute coronary syndromes (ACSs). In the present study, the expression profiles of lncRNAs from 52 patients with ACS were analyzed by re-annotating existing microarray data. The lncRNA expression profiles in the two distinct clinical entities of ACS, myocardial infarction (MI) and unstable angina (UA), were examined. Out of the 2,332 lncRNAs assessed, it was identified that 18 lncRNAs were upregulated and 35 lncRNAs were downregulated in patients with MI compared to those with UA. Furthermore, the expression profiles of patients with ACS were compared at different time points and significantly altered lncRNA expression was observed during the progression of ACS. A total of 7 candidate lncRNA biomarkers were identified and an lncRNA-based classifier was developed to predict MI risk based on the expression data of the 7 lncRNAs using random forest and support vector machine strategies. This achieved a classification accuracy of 90.38% with a sensitivity of 100% and a specificity of 68.75%. Additionally, functional analysis suggested that these 7 lncRNAs may be involved in known MI-associated biological processes and pathways.
Collapse
Affiliation(s)
- Yingjie Lu
- Department of Cardiology, The Fourth Clinical Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Xiangwei Meng
- Department of Radiology, The Fourth Clinical Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Lifeng Wang
- Department of Cardiology, The Fourth Clinical Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Xiaoyun Wang
- Department of Cardiology, The Fourth Clinical Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| |
Collapse
|
42
|
Sinning C, Westermann D, Clemmensen P. Oxidative stress in ischemia and reperfusion: current concepts, novel ideas and future perspectives. Biomark Med 2017; 11:11031-1040. [DOI: 10.2217/bmm-2017-0110] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Oxidative stress remains a major contributor to myocardial injury after ischemia followed by reperfusion (I/R) as the reperfusion of the myocardial infarction (MI) area inevitably leads to a cascade of I/R injury. This review focused on concepts of the antioxidative defense system and elucidates recent research using antioxidants like vitamin C, E and β-carotene or essential trace elements to activate compounds of antioxidative pathways in the circulation. In this context, important defense mechanisms like superoxide dismutase and glutathione peroxidase will be described. Furthermore, the different mechanisms through which myocardial protection can be addressed, like ischemic postconditioning in myocardial infarction or adjunctive measures like targeted temperature management as well as new theories, including the role of iron in I/R injury, will be discussed.
Collapse
Affiliation(s)
- Christoph Sinning
- Department of General & Interventional Cardiology, University Heart Center Hamburg, Hamburg, Germany
| | - Dirk Westermann
- Department of General & Interventional Cardiology, University Heart Center Hamburg, Hamburg, Germany
- German Center of Cardiovascular Research (DZHK), Partner Site Hamburg/Kiel/Lübeck, Hamburg, Germany
| | - Peter Clemmensen
- Department of General & Interventional Cardiology, University Heart Center Hamburg, Hamburg, Germany
- Department of Regional Health Research, Faculty of Health Sciences, Nykøbing Falster & Odense, Denmark
| |
Collapse
|
43
|
Heart Failure and MEF2 Transcriptome Dynamics in Response to β-Blockers. Sci Rep 2017; 7:4476. [PMID: 28667250 PMCID: PMC5493616 DOI: 10.1038/s41598-017-04762-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 05/19/2017] [Indexed: 01/12/2023] Open
Abstract
Myocyte Enhancer Factor 2 (MEF2) mediates cardiac remodelling in heart failure (HF) and is also a target of β-adrenergic signalling, a front-line treatment for HF. We identified global gene transcription networks involved in HF with and without β-blocker treatment. Experimental HF by transverse aortic constriction (TAC) in a MEF2 “sensor” mouse model (6 weeks) was followed by four weeks of β-blockade with Atenolol (AT) or Solvent (Sol) treatment. Transcriptome analysis (RNA-seq) from left ventricular RNA samples and MEF2A depleted cardiomyocytes was performed. AT treatment resulted in an overall improvement in cardiac function of TAC mice and repression of MEF2 activity. RNA-seq identified 65 differentially expressed genes (DEGs) due to TAC treatment with enriched GO clusters including the inflammatory system, cell migration and apoptosis. These genes were mapped against DEGs in cardiomyocytes in which MEF2A expression was suppressed. Of the 65 TAC mediated DEGs, AT reversed the expression of 28 mRNAs. Rarres2 was identified as a novel MEF2 target gene that is upregulated with TAC in vivo and isoproterenol treatment in vitro which may have implications in cardiomyocyte apoptosis and hypertrophy. These studies identify a cohort of genes with vast potential for disease diagnosis and therapeutic intervention in heart failure.
Collapse
|
44
|
Otterbein LE, Foresti R, Motterlini R. Heme Oxygenase-1 and Carbon Monoxide in the Heart: The Balancing Act Between Danger Signaling and Pro-Survival. Circ Res 2017; 118:1940-1959. [PMID: 27283533 DOI: 10.1161/circresaha.116.306588] [Citation(s) in RCA: 137] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 05/02/2016] [Indexed: 12/22/2022]
Abstract
Understanding the processes governing the ability of the heart to repair and regenerate after injury is crucial for developing translational medical solutions. New avenues of exploration include cardiac cell therapy and cellular reprogramming targeting cell death and regeneration. An attractive possibility is the exploitation of cytoprotective genes that exist solely for self-preservation processes and serve to promote and support cell survival. Although the antioxidant and heat-shock proteins are included in this category, one enzyme that has received a great deal of attention as a master protective sentinel is heme oxygenase-1 (HO-1), the rate-limiting step in the catabolism of heme into the bioactive signaling molecules carbon monoxide, biliverdin, and iron. The remarkable cardioprotective effects ascribed to heme oxygenase-1 are best evidenced by its ability to regulate inflammatory processes, cellular signaling, and mitochondrial function ultimately mitigating myocardial tissue injury and the progression of vascular-proliferative disease. We discuss here new insights into the role of heme oxygenase-1 and heme on cardiovascular health, and importantly, how they might be leveraged to promote heart repair after injury.
Collapse
Affiliation(s)
- Leo E Otterbein
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Roberta Foresti
- Inserm, U955, Equipe 12, Créteil, 94000, France.,University Paris Est, Faculty of Medicine, Créteil, 94000, France
| | - Roberto Motterlini
- Inserm, U955, Equipe 12, Créteil, 94000, France.,University Paris Est, Faculty of Medicine, Créteil, 94000, France
| |
Collapse
|
45
|
Immenschuh S, Vijayan V, Janciauskiene S, Gueler F. Heme as a Target for Therapeutic Interventions. Front Pharmacol 2017; 8:146. [PMID: 28420988 PMCID: PMC5378770 DOI: 10.3389/fphar.2017.00146] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 03/07/2017] [Indexed: 12/30/2022] Open
Abstract
Heme is a complex of iron and the tetrapyrrole protoporphyrin IX with essential functions in aerobic organisms. Heme is the prosthetic group of hemoproteins such as hemoglobin and myoglobin, which are crucial for reversible oxygen binding and transport. By contrast, high levels of free heme, which may occur in various pathophysiological conditions, are toxic via pro-oxidant, pro-inflammatory and cytotoxic effects. The toxicity of heme plays a major role for the pathogenesis of prototypical hemolytic disorders including sickle cell disease and malaria. Moreover, there is increasing appreciation that detrimental effects of heme may also be critically involved in diseases, which usually are not associated with hemolysis such as severe sepsis and atherosclerosis. In mammalians homeostasis of heme and its potential toxicity are primarily controlled by two physiological systems. First, the scavenger protein hemopexin (Hx) non-covalently binds extracellular free heme with high affinity and attenuates toxicity of heme in plasma. Second, heme oxygenases (HOs), in particular the inducible HO isozyme, HO-1, can provide antioxidant cytoprotection via enzymatic degradation of intracellular heme. This review summarizes current knowledge on the pathophysiological role of heme for various diseases as demonstrated in experimental animal models and in humans. The functional significance of Hx and HOs for the regulation of heme homeostasis is highlighted. Finally, the therapeutic potential of pharmacological strategies that apply Hx and HO-1 in various clinical settings is discussed.
Collapse
Affiliation(s)
- Stephan Immenschuh
- Institute for Transfusion Medicine, Hannover Medical SchoolHannover, Germany
| | - Vijith Vijayan
- Institute for Transfusion Medicine, Hannover Medical SchoolHannover, Germany
| | | | - Faikah Gueler
- Department of Nephrology, Hannover Medical SchoolHannover, Germany
| |
Collapse
|
46
|
Das SK, Patel VB, Basu R, Wang W, DesAulniers J, Kassiri Z, Oudit GY. Females Are Protected From Iron-Overload Cardiomyopathy Independent of Iron Metabolism: Key Role of Oxidative Stress. J Am Heart Assoc 2017; 6:JAHA.116.003456. [PMID: 28115312 PMCID: PMC5523622 DOI: 10.1161/jaha.116.003456] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Background Sex‐related differences in cardiac function and iron metabolism exist in humans and experimental animals. Male patients and preclinical animal models are more susceptible to cardiomyopathies and heart failure. However, whether similar differences are seen in iron‐overload cardiomyopathy is poorly understood. Methods and Results Male and female wild‐type and hemojuvelin‐null mice were injected and fed with a high‐iron diet, respectively, to develop secondary iron overload and genetic hemochromatosis. Female mice were completely protected from iron‐overload cardiomyopathy, whereas iron overload resulted in marked diastolic dysfunction in male iron‐overloaded mice based on echocardiographic and invasive pressure‐volume analyses. Female mice demonstrated a marked suppression of iron‐mediated oxidative stress and a lack of myocardial fibrosis despite an equivalent degree of myocardial iron deposition. Ovariectomized female mice with iron overload exhibited essential pathophysiological features of iron‐overload cardiomyopathy showing distinct diastolic and systolic dysfunction, severe myocardial fibrosis, increased myocardial oxidative stress, and increased expression of cardiac disease markers. Ovariectomy prevented iron‐induced upregulation of ferritin, decreased myocardial SERCA2a levels, and increased NCX1 levels. 17β‐Estradiol therapy rescued the iron‐overload cardiomyopathy in male wild‐type mice. The responses in wild‐type and hemojuvelin‐null female mice were remarkably similar, highlighting a conserved mechanism of sex‐dependent protection from iron‐overload‐mediated cardiac injury. Conclusions Male and female mice respond differently to iron‐overload‐mediated effects on heart structure and function, and females are markedly protected from iron‐overload cardiomyopathy. Ovariectomy in female mice exacerbated iron‐induced myocardial injury and precipitated severe cardiac dysfunction during iron‐overload conditions, whereas 17β‐estradiol therapy was protective in male iron‐overloaded mice.
Collapse
Affiliation(s)
- Subhash K Das
- Division of Cardiology, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada.,Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Vaibhav B Patel
- Division of Cardiology, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada.,Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Ratnadeep Basu
- Division of Cardiology, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada.,Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Wang Wang
- Department of Physiology, University of Alberta, Edmonton, Alberta, Canada.,Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Jessica DesAulniers
- Division of Cardiology, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada.,Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Zamaneh Kassiri
- Department of Physiology, University of Alberta, Edmonton, Alberta, Canada.,Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Gavin Y Oudit
- Division of Cardiology, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada .,Department of Physiology, University of Alberta, Edmonton, Alberta, Canada.,Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| |
Collapse
|
47
|
Sickle cell anemia mice develop a unique cardiomyopathy with restrictive physiology. Proc Natl Acad Sci U S A 2016; 113:E5182-91. [PMID: 27503873 DOI: 10.1073/pnas.1600311113] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Cardiopulmonary complications are the leading cause of mortality in sickle cell anemia (SCA). Elevated tricuspid regurgitant jet velocity, pulmonary hypertension, diastolic, and autonomic dysfunction have all been described, but a unifying pathophysiology and mechanism explaining the poor prognosis and propensity to sudden death has been elusive. Herein, SCA mice underwent a longitudinal comprehensive cardiac analysis, combining state-of-the-art cardiac imaging with electrocardiography, histopathology, and molecular analysis to determine the basis of cardiac dysfunction. We show that in SCA mice, anemia-induced hyperdynamic physiology was gradually superimposed with restrictive physiology, characterized by progressive left atrial enlargement and diastolic dysfunction with preserved systolic function. This phenomenon was absent in WT mice with experimentally induced chronic anemia of similar degree and duration. Restrictive physiology was associated with microscopic cardiomyocyte loss and secondary fibrosis detectable as increased extracellular volume by cardiac-MRI. Ultrastructural mitochondrial changes were consistent with severe chronic hypoxia/ischemia and sarcomere diastolic-length was shortened. Transcriptome analysis revealed up-regulation of genes involving angiogenesis, extracellular-matrix, circadian-rhythm, oxidative stress, and hypoxia, whereas ion-channel transport and cardiac conduction were down-regulated. Indeed, progressive corrected QT prolongation, arrhythmias, and ischemic changes were noted in SCA mice before sudden death. Sudden cardiac death is common in humans with restrictive cardiomyopathies and long QT syndromes. Our findings may thus provide a unifying cardiac pathophysiology that explains the reported cardiac abnormalities and sudden death seen in humans with SCA.
Collapse
|