1
|
Quiroga D, Roman B, Salih M, Daccarett-Bojanini WN, Garbus H, Ebenebe OV, Dodd-O JM, O'Rourke B, Kohr M, Das S. Sex-dependent phosphorylation of Argonaute 2 reduces the mitochondrial translocation of miR-181c and induces cardioprotection in females. J Mol Cell Cardiol 2024; 194:59-69. [PMID: 38880194 PMCID: PMC11345856 DOI: 10.1016/j.yjmcc.2024.06.006] [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] [Received: 11/02/2023] [Revised: 06/12/2024] [Accepted: 06/13/2024] [Indexed: 06/18/2024]
Abstract
Obesity-induced cardiac dysfunction is growing at an alarming rate, showing a dramatic increase in global prevalence. Mitochondrial translocation of miR-181c in cardiomyocytes results in excessive reactive oxygen species (ROS) production during obesity. ROS causes Sp1, a transcription factor for MICU1, to be degraded via post-translational modification. The subsequent decrease in MICU1 expression causes mitochondrial Ca2+ accumulation, ultimately leading to a propensity for heart failure. Herein, we hypothesized that phosphorylation of Argonaute 2 (AGO2) at Ser 387 (in human) or Ser 388 (in mouse) inhibits the translocation of miR-181c into the mitochondria by increasing the cytoplasmic stability of the RNA-induced silencing complex (RISC). Initially, estrogen offers cardioprotection in pre-menopausal females against the consequences of mitochondrial miR-181c upregulation by driving the phosphorylation of AGO2. Neonatal mouse ventricular myocytes (NMVM) treated with insulin showed an increase in pAGO2 levels and a decrease in mitochondrial miR-181c expression by increasing the binding affinity of AGO2-GW182 in the RISC. Thus, insulin treatment prevented excessive ROS production and mitochondrial Ca2+ accumulation. In human cardiomyocytes, we overexpressed miR-181c to mimic pathological conditions, such as obesity/diabetes. Treatment with estradiol (E2) for 48 h significantly lowered miR-181c entry into the mitochondria through increased pAGO2 levels. E2 treatment also normalized Sp1 degradation and MICU1 transcription that normally occurs in response to miR-181c overexpression. We then investigated these findings using an in vivo model, with age-matched male, female and ovariectomized (OVX) female mice. Consistent with the E2 treatment, we show that female hearts express higher levels of pAGO2 and thus, exhibit higher association of AGO2-GW182 in cytoplasmic RISC. This results in lower expression of mitochondrial miR-181c in female hearts compared to male or OVX groups. Further, female hearts had fewer consequences of mitochondrial miR-181c expression, such as lower Sp1 degradation and significantly decreased MICU1 transcriptional regulation. Taken together, this study highlights a potential therapeutic target for conditions such as obesity and diabetes, where miR-181c is upregulated. NEW AND NOTEWORTHY: In this study, we show that the phosphorylation of Argonaute 2 (AGO2) stabilizes the RNA-induced silencing complex in the cytoplasm, preventing miR-181c entry into the mitochondria. Furthermore, we demonstrate that treatment with estradiol can inhibit the translocation of miR-181c into the mitochondria by phosphorylating AGO2. This ultimately eliminates the downstream consequences of miR-181c overexpression by mitigating excessive reactive oxygen species production and calcium entry into the mitochondria.
Collapse
Affiliation(s)
- Diego Quiroga
- Department of Anesthesiology & Critical Care Medicine, Johns Hopkins School of Medicine, Baltimore, MD 21205, United States of America
| | - Barbara Roman
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205, United States of America
| | - Marwan Salih
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205, United States of America
| | - William N Daccarett-Bojanini
- Department of Anesthesiology & Critical Care Medicine, Johns Hopkins School of Medicine, Baltimore, MD 21205, United States of America
| | - Haley Garbus
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, United States of America
| | - Obialunanma V Ebenebe
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, United States of America
| | - Jeffrey M Dodd-O
- Department of Anesthesiology & Critical Care Medicine, Johns Hopkins School of Medicine, Baltimore, MD 21205, United States of America
| | - Brian O'Rourke
- Division of Cardiology, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD 21205, United States of America
| | - Mark Kohr
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, United States of America
| | - Samarjit Das
- Department of Anesthesiology & Critical Care Medicine, Johns Hopkins School of Medicine, Baltimore, MD 21205, United States of America; Department of Pathology, Johns Hopkins University, Baltimore, MD 21205, United States of America.
| |
Collapse
|
2
|
Bell-Hensley A, Das S, McAlinden A. The miR-181 family: Wide-ranging pathophysiological effects on cell fate and function. J Cell Physiol 2023; 238:698-713. [PMID: 36780342 PMCID: PMC10121854 DOI: 10.1002/jcp.30969] [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: 12/30/2022] [Revised: 01/19/2023] [Accepted: 01/23/2023] [Indexed: 02/14/2023]
Abstract
MicroRNAs (miRNAs) are epigenetic regulators that can target and inhibit translation of multiple mRNAs within a given cell type. As such, a number of different pathways and networks may be modulated as a result. In fact, miRNAs are known to regulate many cellular processes including differentiation, proliferation, inflammation, and metabolism. This review focuses on the miR-181 family and provides information from the published literature on the role of miR-181 homologs in regulating a range of activities in different cell types and tissues. Of note, we have not included details on miR-181 expression and function in the context of cancer since this is a broad topic area requiring independent review. Instead, we have focused on describing the function and mechanism of miR-181 family members on differentiation toward a number of cell lineages in various non-neoplastic conditions (e.g., immune/hematopoietic cells, osteoblasts, osteoclasts, chondrocytes, adipocytes). We have also provided information on how modulation of miR-181 homologs can have positive effects on disease states such as cardiac abnormalities, pulmonary arterial hypertension, thrombosis, osteoarthritis, and vascular inflammation. In this context, we have used some examples of FDA-approved drugs that modulate miR-181 expression. We conclude by discussing some common mechanisms by which miR-181 homologs appear to regulate a number of different cellular processes and how targeting specific miR-181 family members may lead to attractive therapeutic approaches to treat a number of human disease or repair conditions, including those associated with the aging process.
Collapse
Affiliation(s)
- Austin Bell-Hensley
- Department of Biomedical Engineering, Washington University School of Medicine, St Louis, Missouri
| | - Samarjit Das
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Audrey McAlinden
- Department of Orthopaedic Surgery Washington University School of Medicine, St Louis, Missouri
- Department of Cell Biology & Physiology, Washington University School of Medicine, St Louis, Missouri, USA
- Shriners Hospital for Children – St Louis, Missouri
| |
Collapse
|
3
|
Different platforms for mitomiRs in mitochondria: Emerging facets in regulation of mitochondrial functions. Mitochondrion 2022; 66:67-73. [DOI: 10.1016/j.mito.2022.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 07/29/2022] [Accepted: 08/02/2022] [Indexed: 11/23/2022]
|
4
|
Tuday E, Nakano M, Akiyoshi K, Fu X, Shah AP, Yamaguchi A, Steenbergen C, Santhanam L, An SS, Berkowitz D, Baraban JM, Das S. Degradation of Premature-miR-181b by the Translin/Trax RNase Increases Vascular Smooth Muscle Cell Stiffness. Hypertension 2021; 78:831-839. [PMID: 34304585 PMCID: PMC8363557 DOI: 10.1161/hypertensionaha.120.16690] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
[Figure: see text].
Collapse
Affiliation(s)
- Eric Tuday
- Geriatric Research Education and Clinical Center (GRECC), Veterans Affairs: Salt Lake City, UT 84148
- Department of Internal Medicine: Division of Cardiology, University of Utah, Salt Lake City, UT 84132
| | | | - Kei Akiyoshi
- Department of Anesthesiology & Critical Care Medicine
| | - Xiuping Fu
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins School of Medicine, Baltimore, MD 21205
| | - Aparna P. Shah
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins School of Medicine, Baltimore, MD 21205
| | - Atsushi Yamaguchi
- Department of Cardiovascular Surgery, Saitama Medical Center, Jichi Medical University, Saitama, Japan
| | - Charles Steenbergen
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD 21205
| | | | - Steven S. An
- Department of Pharmacology, Rutgers-Robert Wood Johnson Medical School, The State University of New Jersey, Piscataway, NJ, 08854
- Rutgers Institute of Translational Medicine & Science, New Brunswick, NJ 08901
| | - Dan Berkowitz
- Department of Anesthesiology and Perioperative Medicine, The University of Alabama at Birmingham, Birmingham, AL 35294
| | - Jay M. Baraban
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins School of Medicine, Baltimore, MD 21205
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD 21205
| | - Samarjit Das
- Department of Anesthesiology & Critical Care Medicine
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD 21205
| |
Collapse
|
5
|
Roman B, Kaur P, Ashok D, Kohr M, Biswas R, O'Rourke B, Steenbergen C, Das S. Nuclear-mitochondrial communication involving miR-181c plays an important role in cardiac dysfunction during obesity. J Mol Cell Cardiol 2020; 144:87-96. [PMID: 32442661 DOI: 10.1016/j.yjmcc.2020.05.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 05/09/2020] [Accepted: 05/16/2020] [Indexed: 12/26/2022]
Abstract
AIMS In cardiomyocytes, there is microRNA (miR) in the mitochondria that originates from the nuclear genome and matures in the cytoplasm before translocating into the mitochondria. Overexpression of one such miR, miR-181c, can lead to heart failure by stimulating reactive oxygen species (ROS) production and increasing mitochondrial calcium level ([Ca2+]m). Mitochondrial calcium uptake 1 protein (MICU1), a regulatory protein in the mitochondrial calcium uniporter complex, plays an important role in regulating [Ca2+]m. Obesity results in miR-181c overexpression and a decrease in MICU1. We hypothesize that lowering miR-181c would protect against obesity-induced cardiac dysfunction. METHODS AND RESULTS We used an in vivo mouse model of high-fat diet (HFD) for 18 weeks and induced high lipid load in H9c2 cells with oleate-conjugated bovine serum albumin in vitro. We tested the cardioprotective role of lowering miR-181c by using miR-181c/d-/- mice (in vivo) and AntagomiR against miR-181c (in vitro). HFD significantly upregulated heart levels of miR-181c and led to cardiac hypertrophy in wild-type mice, but not in miR-181c/d-/- mice. HFD also increased ROS production and pyruvate dehydrogenase activity (a surrogate for [Ca2+]m), but the increases were alleviated in miR-181c/d-/- mice. Moreover, miR-181c/d-/- mice fed a HFD had higher levels of MICU1 than did wild-type mice fed a HFD, attenuating the rise in [Ca2+]m. Overexpression of miR-181c in neonatal ventricular cardiomyocytes (NMVM) caused increased ROS production, which oxidized transcription factor Sp1 and led to a loss of Sp1, thereby slowing MICU1 transcription. Hence, miR-181c increases [Ca2+]m through Sp1 oxidation and downregulation of MICU1, suggesting that the cardioprotective effect of miR-181c/d-/- results from inhibition of Sp1 oxidation. CONCLUSION This study has identified a unique nuclear-mitochondrial communication mechanism in the heart orchestrated by miR-181c. Obesity-induced overexpression of miR-181c increases [Ca2+]m via downregulation of MICU1 and leads to cardiac injury. A strategy to inhibit miR-181c in cardiomyocytes can preserve cardiac function during obesity by improving mitochondrial function. Altering miR-181c expression may provide a pharmacologic approach to improve cardiomyopathy in individuals with obesity/type 2 diabetes.
Collapse
Affiliation(s)
- Barbara Roman
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD, United States of America
| | - Pawandeep Kaur
- Department of Anesthesiology & Critical Care Medicine, Johns Hopkins School of Medicine, Baltimore, MD, United States of America
| | - Deepthi Ashok
- Division of Cardiology, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, United States of America
| | - Mark Kohr
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States of America
| | - Roopa Biswas
- Department of Anatomy, Physiology and Genetics, School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, United States of America
| | - Brian O'Rourke
- Division of Cardiology, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, United States of America
| | - Charles Steenbergen
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD, United States of America.
| | - Samarjit Das
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD, United States of America; Department of Anesthesiology & Critical Care Medicine, Johns Hopkins School of Medicine, Baltimore, MD, United States of America.
| |
Collapse
|
6
|
Jaquenod De Giusti C, Santalla M, Das S. Exosomal non-coding RNAs (Exo-ncRNAs) in cardiovascular health. J Mol Cell Cardiol 2019; 137:143-151. [PMID: 31669445 DOI: 10.1016/j.yjmcc.2019.09.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 09/05/2019] [Accepted: 09/27/2019] [Indexed: 12/11/2022]
Abstract
Extracellular vesicles (EVs) play a role in the pathophysiological processes and in different diseases, including cardiovascular disease. Out of several categories of EVs, exosomes (smallest - 30 to 150 nm) are gaining most of the focus as the next generation of biomarkers and in therapeutic strategies. This is because exosomes can be differentiated from other types of EVs based on the expression of tetraspanin molecules on the surface. More importantly, exosomes can be traced back to the cell of origin by identifying the unique cellular marker(s) on the exosomal surface. Recently, several researchs have demonstrated an important and underappreciated mechanism of paracrine cell-cell communication involving exosomal transfer, and its subsequent functional impact on recipient cells. Exosomes are enriched in proteins, mRNAs, miRNAs, and other non-coding RNAs, which can potentially alter myocardial function. Additionally, different stages of tissue damage can also be identified by measuring these bioactive molecules in the circulation. There are several aspects of this new concept still unknown. Therefore, in this review, we have summarized the knowledge we have so far and highlighted the potential of this novel concept of next generation biomarkers and therapeutic intervention.
Collapse
Affiliation(s)
- Carolina Jaquenod De Giusti
- Centro de Investigaciones Cardiovasculares UNLP-CONICET, Facultad de Ciencias Médicas, Universidad Nacional de La Plata, La Plata, Argentina.
| | - Manuela Santalla
- Centro de Investigaciones Cardiovasculares UNLP-CONICET, Facultad de Ciencias Médicas, Universidad Nacional de La Plata, La Plata, Argentina; Departamento de Ciencias Básicas y Experimentales, Universidad Nacional del Noroeste de Buenos Aires, Pergamino, Argentina
| | - Samarjit Das
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA.
| |
Collapse
|
7
|
Abstract
MicroRNAs (miRNAs) are known as the master regulators of gene expression, and for the last two decades our knowledge of their functional reach keeps expanding. Recent studies have shown that a miRNA’s role in regulation extends to extracellular and intracellular organelles. Several studies have shown a role for miRNA in regulating the mitochondrial genome in normal and disease conditions. Mitochondrial dysfunction occurs in many human pathologies, such as cardiovascular disease, diabetes, cancer, and neurological diseases. These studies have shed some light on regulation of the mitochondrial genome as well as helped to explain the role of miRNA in altering mitochondrial function and the ensuing effects on cells. Although the field has grown in recent years, many questions still remain. For example, little is known about how nuclear-encoded miRNAs translocate to the mitochondrial matrix. Knowledge of the mechanisms of miRNA transport into the mitochondrial matrix is likely to provide important insights into our understanding of disease pathophysiology and could represent new targets for therapeutic intervention. For this review, our focus will be on the role of a subset of miRNAs, known as MitomiR, in mitochondrial function. We also discuss the potential mechanisms used by these nuclear-encoded miRNAs for import into the mitochondrial compartment. Listen to this article’s corresponding podcast at http://ajpheart.podbean.com/e/microrna-translocation-into-the-mitochondria/ .
Collapse
Affiliation(s)
| | - Samarjit Das
- Department of Pathology, Johns Hopkins University, Baltimore, Maryland
| |
Collapse
|