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Papaioannou P, Wallace MJ, Malhotra N, Mohler PJ, El Refaey M. Biochemical Structure and Function of TRAPP Complexes in the Cardiac System. JACC Basic Transl Sci 2023; 8:1599-1612. [PMID: 38205348 PMCID: PMC10774597 DOI: 10.1016/j.jacbts.2023.03.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 03/14/2023] [Indexed: 01/12/2024]
Abstract
Trafficking protein particle (TRAPP) is well reported to play a role in the trafficking of protein products within the Golgi and endoplasmic reticulum. Dysfunction in TRAPP has been associated with disorders in the nervous and cardiovascular systems, but the majority of literature focuses on TRAPP function in the nervous system solely. Here, we highlight the known pathways of TRAPP and hypothesize potential impacts of TRAPP dysfunction on the cardiovascular system, particularly the role of TRAPP as a guanine-nucleotide exchange factor for Rab1 and Rab11. We also review the various cardiovascular phenotypes associated with changes in TRAPP complexes and their subunits.
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Affiliation(s)
- Peter Papaioannou
- Frick Center for Heart Failure and Arrhythmia Research, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
- Division of Cardiac Surgery, Department of Surgery, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
| | - Michael J. Wallace
- Frick Center for Heart Failure and Arrhythmia Research, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
- Department of Physiology and Cell Biology, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
| | - Nipun Malhotra
- Frick Center for Heart Failure and Arrhythmia Research, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
- Division of Cardiac Surgery, Department of Surgery, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
| | - Peter J. Mohler
- Frick Center for Heart Failure and Arrhythmia Research, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
- Department of Physiology and Cell Biology, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
- Division of Cardiovascular Medicine, Department of Internal Medicine, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
| | - Mona El Refaey
- Frick Center for Heart Failure and Arrhythmia Research, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
- Division of Cardiac Surgery, Department of Surgery, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
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2
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Meyer KM, Malhotra N, Kwak JS, El Refaey M. Relevance of KCNJ5 in Pathologies of Heart Disease. Int J Mol Sci 2023; 24:10849. [PMID: 37446026 PMCID: PMC10341679 DOI: 10.3390/ijms241310849] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 06/16/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023] Open
Abstract
Abnormalities in G-protein-gated inwardly rectifying potassium (GIRK) channels have been implicated in diseased states of the cardiovascular system; however, the role of GIRK4 (Kir3.4) in cardiac physiology and pathophysiology has yet to be completely understood. Within the heart, the KACh channel, consisting of two GIRK1 and two GIRK4 subunits, plays a major role in modulating the parasympathetic nervous system's influence on cardiac physiology. Being that GIRK4 is necessary for the functional KACh channel, KCNJ5, which encodes GIRK4, it presents as a therapeutic target for cardiovascular pathology. Human variants in KCNJ5 have been identified in familial hyperaldosteronism type III, long QT syndrome, atrial fibrillation, and sinus node dysfunction. Here, we explore the relevance of KCNJ5 in each of these diseases. Further, we address the limitations and complexities of discerning the role of KCNJ5 in cardiovascular pathophysiology, as identical human variants of KCNJ5 have been identified in several diseases with overlapping pathophysiology.
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Affiliation(s)
- Karisa M. Meyer
- Department of Surgery, Division of Cardiac Surgery, The Ohio State University, Columbus, OH 43210, USA; (K.M.M.); (N.M.); (J.s.K.)
- The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210, USA
| | - Nipun Malhotra
- Department of Surgery, Division of Cardiac Surgery, The Ohio State University, Columbus, OH 43210, USA; (K.M.M.); (N.M.); (J.s.K.)
- The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210, USA
| | - Jung seo Kwak
- Department of Surgery, Division of Cardiac Surgery, The Ohio State University, Columbus, OH 43210, USA; (K.M.M.); (N.M.); (J.s.K.)
- The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210, USA
| | - Mona El Refaey
- Department of Surgery, Division of Cardiac Surgery, The Ohio State University, Columbus, OH 43210, USA; (K.M.M.); (N.M.); (J.s.K.)
- The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210, USA
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3
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Wallace MJ, Malhotra N, Mariángelo JIE, Stevens TL, Young LJ, Antwi-Boasiako S, Abdallah D, Takenaka SS, Cavus O, Murphy NP, Han M, Xu X, Mangoni ME, Hund TJ, Roberts JD, Györke S, Mohler PJ, El Refaey M. Impact of stress on cardiac phenotypes in mice harboring an ankyrin-B disease variant. J Biol Chem 2023; 299:104818. [PMID: 37182735 PMCID: PMC10318515 DOI: 10.1016/j.jbc.2023.104818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 05/04/2023] [Accepted: 05/06/2023] [Indexed: 05/16/2023] Open
Abstract
Encoded by ANK2, ankyrin-B (AnkB) is a multifunctional adapter protein critical for the expression and targeting of key cardiac ion channels, transporters, cytoskeletal-associated proteins, and signaling molecules. Mice deficient for AnkB expression are neonatal lethal, and mice heterozygous for AnkB expression display cardiac structural and electrical phenotypes. Human ANK2 loss-of-function variants are associated with diverse cardiac manifestations; however, human clinical 'AnkB syndrome' displays incomplete penetrance. To date, animal models for human arrhythmias have generally been knock-out or transgenic overexpression models and thus the direct impact of ANK2 variants on cardiac structure and function in vivo is not clearly defined. Here, we directly tested the relationship of a single human ANK2 disease-associated variant with cardiac phenotypes utilizing a novel in vivo animal model. At baseline, young AnkBp.E1458G+/+ mice lacked significant structural or electrical abnormalities. However, aged AnkBp.E1458G+/+ mice displayed both electrical and structural phenotypes at baseline including bradycardia and aberrant heart rate variability, structural remodeling, and fibrosis. Young and old AnkBp.E1458G+/+ mice displayed ventricular arrhythmias following acute (adrenergic) stress. In addition, young AnkBp.E1458G+/+ mice displayed structural remodeling following chronic (transverse aortic constriction) stress. Finally, AnkBp.E1458G+/+ myocytes harbored alterations in expression and/or localization of key AnkB-associated partners, consistent with the underlying disease mechanism. In summary, our findings illustrate the critical role of AnkB in in vivo cardiac function as well as the impact of single AnkB loss-of-function variants in vivo. However, our findings illustrate the contribution and in fact necessity of secondary factors (aging, adrenergic challenge, pressure-overload) to phenotype penetrance and severity.
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Affiliation(s)
- Michael J Wallace
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA
| | - Nipun Malhotra
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Surgery/Division of Cardiac Surgery, The Ohio State University, Columbus, Ohio, USA
| | - Juan Ignacio Elio Mariángelo
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA
| | - Tyler L Stevens
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA
| | - Lindsay J Young
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Steve Antwi-Boasiako
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Danielle Abdallah
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Sarah Sumie Takenaka
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Omer Cavus
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Nathaniel P Murphy
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Mei Han
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Xianyao Xu
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Matteo E Mangoni
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Thomas J Hund
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio, USA; Department of Internal Medicine/Division of Cardiovascular Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Jason D Roberts
- Population Health Research Institute, McMaster University, and Hamilton Health Sciences, Hamilton, Ontario, Canada
| | - Sandor Györke
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA
| | - Peter J Mohler
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA; Department of Internal Medicine/Division of Cardiovascular Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Mona El Refaey
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Surgery/Division of Cardiac Surgery, The Ohio State University, Columbus, Ohio, USA.
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Wu Q, Kumar N, Lafuse WP, Ahumada OS, Saljoughian N, Whetstone E, Zani A, Patton AK, El Refaey M, Webb A, Pietrzak M, Yu L, KC M, Peeples ME, Ganesan LP, Yount JS, Rajaram MV. Influenza A virus modulates ACE2 expression and SARS-CoV-2 infectivity in human cardiomyocytes. iScience 2022; 25:105701. [PMID: 36474635 PMCID: PMC9715453 DOI: 10.1016/j.isci.2022.105701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 09/22/2022] [Accepted: 11/29/2022] [Indexed: 12/03/2022] Open
Abstract
Influenza A virus (IAV) and SARS-CoV-2 virus are both acute respiratory viruses currently circulating in the human population. This study aims to determine the impact of IAV infection on SARS-CoV-2 pathogenesis and cardiomyocyte function. Infection of human bronchial epithelial cells (HBEC), A549 cells, lung fibroblasts (HLF), monocyte derived macrophages (MDMs), cardiac fibroblasts (HCF) and hiPSC-derived cardiomyocytes with IAV enhanced the expression of ACE2, the SARS-CoV-2 receptor. Similarly, IAV infection increased levels of ACE2 in the lungs of mice and humans. Of interest, we detected heavily glycosylated form of ACE2 in hiPSC-CMs and poorly glycosylated ACE2 in other cell types. Also, prior IAV infection enhances SARS-CoV-2 spike protein binding and viral entry in all cell types. However, efficient SARS-CoV-2 replication was uniquely inhibited in cardiomyocytes. Glycosylation of ACE2 correlated with enzymatic conversion of its substrate Ang II, induction of eNOS and nitric oxide production, may provide a potential mechanism for the restricted SARS-CoV-2 replication in cardiomyocytes.
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Affiliation(s)
- Qian Wu
- Department of Microbial Infection and Immunity, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA
| | - Naresh Kumar
- Department of Microbial Infection and Immunity, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA
| | - William P. Lafuse
- Department of Microbial Infection and Immunity, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA
| | - Omar Santiagonunez Ahumada
- Department of Microbial Infection and Immunity, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA
| | - Noushin Saljoughian
- Department of Microbial Infection and Immunity, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA
| | - Elizabeth Whetstone
- Department of Microbial Infection and Immunity, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA
| | - Ashley Zani
- Department of Microbial Infection and Immunity, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA
| | - Ashley K. Patton
- Department of Pathology, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA
| | - Mona El Refaey
- Department of Surgery, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA
| | - Amy Webb
- Department of Biomedical Informatics, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA
| | - Maciej Pietrzak
- Department of Biomedical Informatics, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA
| | - Lianbo Yu
- Department of Biomedical Informatics, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA
| | - Mahesh KC
- Department of Pediatrics, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA,Center for Vaccines and Immunity, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA
| | - Mark E. Peeples
- Department of Pediatrics, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA,Center for Vaccines and Immunity, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA
| | - Latha P. Ganesan
- Department of Internal Medicine College of Medicine, The Ohio State University, Wexner Medical Center, Columbus, OH 43210, USA
| | - Jacob S. Yount
- Department of Microbial Infection and Immunity, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA
| | - Murugesan V.S. Rajaram
- Department of Microbial Infection and Immunity, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH 43209, USA,Corresponding author
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5
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Young LJ, Antwi-Boasiako S, Ferrall J, Wold LE, Mohler PJ, El Refaey M. Genetic and non-genetic risk factors associated with atrial fibrillation. Life Sci 2022; 299:120529. [PMID: 35385795 PMCID: PMC9058231 DOI: 10.1016/j.lfs.2022.120529] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 03/08/2022] [Accepted: 03/31/2022] [Indexed: 12/15/2022]
Abstract
Atrial fibrillation (AF) is the most common arrhythmic disorder and its prevalence in the United States is projected to increase to more than twelve million cases in 2030. AF increases the risk of other forms of cardiovascular disease, including stroke. As the incidence of atrial fibrillation increases dramatically with age, it is paramount to elucidate risk factors underlying AF pathogenesis. Here, we review tissue and cellular pathways underlying AF, as well as critical components that impact AF susceptibility including genetic and environmental risk factors. Finally, we provide the latest information on potential links between SARS-CoV-2 and human AF. Improved understanding of mechanistic pathways holds promise in preventative care and early diagnostics, and also introduces novel targeted forms of therapy that might attenuate AF progression and maintenance.
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Affiliation(s)
- Lindsay J Young
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, USA; Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH, USA
| | - Steve Antwi-Boasiako
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, USA; Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH, USA
| | - Joel Ferrall
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, USA
| | - Loren E Wold
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, USA; Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH, USA; College of Nursing, The Ohio State University, Columbus, OH, USA
| | - Peter J Mohler
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, USA; Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH, USA; Department of Internal Medicine, Division of Cardiovascular Medicine, The Ohio State University, Columbus, OH, USA
| | - Mona El Refaey
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, USA; Department of Surgery, Division of Cardiac Surgery, The Ohio State University, Columbus, OH, USA.
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6
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Koenig SN, Sucharski HC, Jose EM, Dudley EK, Madiai F, Cavus O, Argall AD, Williams JL, Murphy NP, Keith CBR, Refaey ME, Gumina RJ, Boudoulas KD, Milks MW, Sofowora G, Smith SA, Hund TJ, Wright NT, Bradley EA, Zareba KM, Wold LE, Mazzaferri EL, Mohler PJ. Inherited Variants in SCARB1 Cause Severe Early-Onset Coronary Artery Disease. Circ Res 2021; 129:296-307. [PMID: 33975440 PMCID: PMC8273129 DOI: 10.1161/circresaha.120.318793] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Sara N. Koenig
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210
| | - Holly C. Sucharski
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210
| | - Elizabeth M. Jose
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210
| | - Emma K. Dudley
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210
| | - Francesca Madiai
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Ross Heart Hospital, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210
| | - Omer Cavus
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210
| | - Aaron D. Argall
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210
| | - Jordan L. Williams
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210
| | - Nathaniel P. Murphy
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210
| | - Caullin B. R. Keith
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210
| | - Mona El Refaey
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210
| | - Richard J. Gumina
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Ross Heart Hospital, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210
| | - Konstantinos D. Boudoulas
- Ross Heart Hospital, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210
| | - M. Wesley Milks
- Ross Heart Hospital, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210
| | - Gbemiga Sofowora
- Ross Heart Hospital, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210
| | - Sakima A. Smith
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210
- Ross Heart Hospital, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210
| | - Thomas J. Hund
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210
| | - Nathan T. Wright
- Department of Chemistry and Biochemistry, James Madison University, Harrisonburg, VA 22807
| | - Elisa A. Bradley
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Ross Heart Hospital, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210
| | - Karolina M. Zareba
- Ross Heart Hospital, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210
| | - Loren E. Wold
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210
- College of Nursing, The Ohio State University, Columbus, OH 43210
| | - Ernest L. Mazzaferri
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Ross Heart Hospital, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210
| | - Peter J. Mohler
- Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University, Columbus, OH 43210
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210
- Ross Heart Hospital, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210
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7
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Wallace MJ, El Refaey M, Mesirca P, Hund TJ, Mangoni ME, Mohler PJ. Genetic Complexity of Sinoatrial Node Dysfunction. Front Genet 2021; 12:654925. [PMID: 33868385 PMCID: PMC8047474 DOI: 10.3389/fgene.2021.654925] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 03/01/2021] [Indexed: 12/13/2022] Open
Abstract
The pacemaker cells of the cardiac sinoatrial node (SAN) are essential for normal cardiac automaticity. Dysfunction in cardiac pacemaking results in human sinoatrial node dysfunction (SND). SND more generally occurs in the elderly population and is associated with impaired pacemaker function causing abnormal heart rhythm. Individuals with SND have a variety of symptoms including sinus bradycardia, sinus arrest, SAN block, bradycardia/tachycardia syndrome, and syncope. Importantly, individuals with SND report chronotropic incompetence in response to stress and/or exercise. SND may be genetic or secondary to systemic or cardiovascular conditions. Current management of patients with SND is limited to the relief of arrhythmia symptoms and pacemaker implantation if indicated. Lack of effective therapeutic measures that target the underlying causes of SND renders management of these patients challenging due to its progressive nature and has highlighted a critical need to improve our understanding of its underlying mechanistic basis of SND. This review focuses on current information on the genetics underlying SND, followed by future implications of this knowledge in the management of individuals with SND.
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Affiliation(s)
- Michael J. Wallace
- Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University Wexner Medical Center, Columbus, OH, United States
- Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States
- Department of Physiology and Cell Biology, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Mona El Refaey
- Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University Wexner Medical Center, Columbus, OH, United States
- Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States
- Department of Physiology and Cell Biology, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Pietro Mesirca
- CNRS, INSERM, Institut de Génomique Fonctionnelle, Université de Montpellier, Montpellier, France
- Laboratory of Excellence ICST, Montpellier, France
| | - Thomas J. Hund
- Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University Wexner Medical Center, Columbus, OH, United States
- Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States
- Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, OH, United States
| | - Matteo E. Mangoni
- CNRS, INSERM, Institut de Génomique Fonctionnelle, Université de Montpellier, Montpellier, France
- Laboratory of Excellence ICST, Montpellier, France
| | - Peter J. Mohler
- Frick Center for Heart Failure and Arrhythmia Research, The Ohio State University Wexner Medical Center, Columbus, OH, United States
- Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States
- Department of Physiology and Cell Biology, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States
- Division of Cardiovascular Medicine, Department of Internal Medicine, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States
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8
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Cavus O, Williams J, Musa H, El Refaey M, Gratz D, Shaheen R, Schwieterman NA, Koenig S, Antwi-Boasiako S, Young LJ, Xu X, Han M, Wold LE, Hund TJ, Mohler PJ, Bradley EA. Giant ankyrin-G regulates cardiac function. J Biol Chem 2021; 296:100507. [PMID: 33675749 PMCID: PMC8040283 DOI: 10.1016/j.jbc.2021.100507] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 03/01/2021] [Accepted: 03/02/2021] [Indexed: 11/30/2022] Open
Abstract
Cardiovascular disease (CVD) remains the most common cause of adult morbidity and mortality in developed nations. As a result, predisposition for CVD is increasingly important to understand. Ankyrins are intracellular proteins required for the maintenance of membrane domains. Canonical ankyrin-G (AnkG) has been shown to be vital for normal cardiac function, specifically cardiac excitability, via targeting and regulation of the cardiac voltage-gated sodium channel. Noncanonical (giant) AnkG isoforms play a key role in neuronal membrane biogenesis and excitability, with evidence for human neurologic disease when aberrant. However, the role of giant AnkG in cardiovascular tissue has yet to be explored. Here, we identify giant AnkG in the myocardium and identify that it is enriched in 1-week-old mice. Using a new mouse model lacking giant AnkG expression in myocytes, we identify that young mice displayed a dilated cardiomyopathy phenotype with aberrant electrical conduction and enhanced arrhythmogenicity. Structural and electrical dysfunction occurred at 1 week of age, when giant AnkG was highly expressed and did not appreciably change in adulthood until advanced age. At a cellular level, loss of giant AnkG results in delayed and early afterdepolarizations. However, surprisingly, giant AnkG cKO myocytes display normal INa, but abnormal myocyte contractility, suggesting unique roles of the large isoform in the heart. Finally, transcript analysis provided evidence for unique pathways that may contribute to the structural and electrical findings shown in giant AnkG cKO animals. In summary, we identify a critical role for giant AnkG that adds to the diversity of ankyrin function in the heart.
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Affiliation(s)
- Omer Cavus
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA; The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Jordan Williams
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA; The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Hassan Musa
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA; The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Mona El Refaey
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA; The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Dan Gratz
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Rebecca Shaheen
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Neill A Schwieterman
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA; The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Sara Koenig
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA; The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Steve Antwi-Boasiako
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Lindsay J Young
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA; The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Xianyao Xu
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA; The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Mei Han
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA; The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Loren E Wold
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA; The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Thomas J Hund
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio, USA; Department of Internal Medicine/Division of Cardiovascular Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Peter J Mohler
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA; The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Internal Medicine/Division of Cardiovascular Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Elisa A Bradley
- The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA; Department of Internal Medicine/Division of Cardiovascular Medicine, The Ohio State University, Columbus, Ohio, USA.
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9
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Mazzone A, Strege PR, Gibbons SJ, Alcaino C, Joshi V, Haak AJ, Tschumperlin DJ, Bernard CE, Cima RR, Larson DW, Chua HK, Graham RP, El Refaey M, Mohler PJ, Hayashi Y, Ordog T, Calder S, Du P, Farrugia G, Beyder A. microRNA overexpression in slow transit constipation leads to reduced Na V1.5 current and altered smooth muscle contractility. Gut 2020; 69:868-876. [PMID: 31757880 PMCID: PMC7147984 DOI: 10.1136/gutjnl-2019-318747] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 10/16/2019] [Accepted: 11/06/2019] [Indexed: 12/13/2022]
Abstract
OBJECTIVE This study was designed to evaluate the roles of microRNAs (miRNAs) in slow transit constipation (STC). DESIGN All human tissue samples were from the muscularis externa of the colon. Expression of 372 miRNAs was examined in a discovery cohort of four patients with STC versus three age/sex-matched controls by a quantitative PCR array. Upregulated miRNAs were examined by quantitative reverse transcription qPCR (RT-qPCR) in a validation cohort of seven patients with STC and age/sex-matched controls. The effect of a highly differentially expressed miRNA on a custom human smooth muscle cell line was examined in vitro by RT-qPCR, electrophysiology, traction force microscopy, and ex vivo by lentiviral transduction in rat muscularis externa organotypic cultures. RESULTS The expression of 13 miRNAs was increased in STC samples. Of those miRNAs, four were predicted to target SCN5A, the gene that encodes the Na+ channel NaV1.5. The expression of SCN5A mRNA was decreased in STC samples. Let-7f significantly decreased Na+ current density in vitro in human smooth muscle cells. In rat muscularis externa organotypic cultures, overexpression of let-7f resulted in reduced frequency and amplitude of contraction. CONCLUSIONS A small group of miRNAs is upregulated in STC, and many of these miRNAs target the SCN5A-encoded Na+ channel NaV1.5. Within this set, a novel NaV1.5 regulator, let-7f, resulted in decreased NaV1.5 expression, current density and reduced motility of GI smooth muscle. These results suggest NaV1.5 and miRNAs as novel diagnostic and potential therapeutic targets in STC.
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Affiliation(s)
- Amelia Mazzone
- Enteric NeuroScience Program (ENSP), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Peter R Strege
- Enteric NeuroScience Program (ENSP), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA,Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
| | - Simon J Gibbons
- Enteric NeuroScience Program (ENSP), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA,Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
| | - Constanza Alcaino
- Enteric NeuroScience Program (ENSP), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Vikram Joshi
- Enteric NeuroScience Program (ENSP), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Andrew J Haak
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
| | - Daniel J Tschumperlin
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
| | - Cheryl E Bernard
- Enteric NeuroScience Program (ENSP), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Robert R Cima
- Department of Colon and Rectal Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - David W Larson
- Department of Colon and Rectal Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Heidi K Chua
- Department of Colon and Rectal Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Mona El Refaey
- Departments of Physiology and Cell Biology, The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA,Department of Internal Medicine, The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
| | - Peter J Mohler
- Departments of Physiology and Cell Biology, The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
| | - Yujiro Hayashi
- Enteric NeuroScience Program (ENSP), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Tamas Ordog
- Enteric NeuroScience Program (ENSP), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA,Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
| | - Stefan Calder
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Peng Du
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Gianrico Farrugia
- Enteric NeuroScience Program (ENSP), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA .,Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
| | - Arthur Beyder
- Enteric NeuroScience Program (ENSP), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA .,Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
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10
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El Refaey M, Musa H, Murphy NP, Lubbers ER, Skaf M, Han M, Cavus O, Koenig SN, Wallace MJ, Gratz D, Bradley E, Alsina KM, Wehrens XHT, Hund TJ, Mohler PJ. Protein Phosphatase 2A Regulates Cardiac Na + Channels. Circ Res 2019; 124:737-746. [PMID: 30602331 DOI: 10.1161/circresaha.118.314350] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
RATIONALE Voltage-gated Na+ channel ( INa) function is critical for normal cardiac excitability. However, the Na+ channel late component ( INa,L) is directly associated with potentially fatal forms of congenital and acquired human arrhythmia. CaMKII (Ca2+/calmodulin-dependent kinase II) enhances INa,L in response to increased adrenergic tone. However, the pathways that negatively regulate the CaMKII/Nav1.5 axis are unknown and essential for the design of new therapies to regulate the pathogenic INa,L. OBJECTIVE To define phosphatase pathways that regulate INa,L in vivo. METHODS AND RESULTS A mouse model lacking a key regulatory subunit (B56α) of the PP (protein phosphatase) 2A holoenzyme displayed aberrant action potentials after adrenergic stimulation. Unbiased computational modeling of B56α KO (knockout) mouse myocyte action potentials revealed an unexpected role of PP2A in INa,L regulation that was confirmed by direct INa,L recordings from B56α KO myocytes. Further, B56α KO myocytes display decreased sensitivity to isoproterenol-induced induction of arrhythmogenic INa,L, and reduced CaMKII-dependent phosphorylation of Nav1.5. At the molecular level, PP2A/B56α complex was found to localize and coimmunoprecipitate with the primary cardiac Nav channel, Nav1.5. CONCLUSIONS PP2A regulates Nav1.5 activity in mouse cardiomyocytes. This regulation is critical for pathogenic Nav1.5 late current and requires PP2A-B56α. Our study supports B56α as a novel target for the treatment of arrhythmia.
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Affiliation(s)
- Mona El Refaey
- From the Ohio State University College of Medicine and Wexner Medical Center, The Frick Center for Heart Failure and Arrhythmia, The Dorothy M. Davis Heart and Lung Research Institute, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., D.G., E.B., T.J.H., P.J.M.).,Department of Physiology and Cell Biology, Ohio State University, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., P.J.M.)
| | - Hassan Musa
- From the Ohio State University College of Medicine and Wexner Medical Center, The Frick Center for Heart Failure and Arrhythmia, The Dorothy M. Davis Heart and Lung Research Institute, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., D.G., E.B., T.J.H., P.J.M.).,Department of Physiology and Cell Biology, Ohio State University, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., P.J.M.)
| | - Nathaniel P Murphy
- From the Ohio State University College of Medicine and Wexner Medical Center, The Frick Center for Heart Failure and Arrhythmia, The Dorothy M. Davis Heart and Lung Research Institute, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., D.G., E.B., T.J.H., P.J.M.).,Department of Physiology and Cell Biology, Ohio State University, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., P.J.M.)
| | - Ellen R Lubbers
- From the Ohio State University College of Medicine and Wexner Medical Center, The Frick Center for Heart Failure and Arrhythmia, The Dorothy M. Davis Heart and Lung Research Institute, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., D.G., E.B., T.J.H., P.J.M.).,Department of Physiology and Cell Biology, Ohio State University, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., P.J.M.)
| | - Michel Skaf
- From the Ohio State University College of Medicine and Wexner Medical Center, The Frick Center for Heart Failure and Arrhythmia, The Dorothy M. Davis Heart and Lung Research Institute, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., D.G., E.B., T.J.H., P.J.M.).,Department of Physiology and Cell Biology, Ohio State University, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., P.J.M.)
| | - Mei Han
- From the Ohio State University College of Medicine and Wexner Medical Center, The Frick Center for Heart Failure and Arrhythmia, The Dorothy M. Davis Heart and Lung Research Institute, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., D.G., E.B., T.J.H., P.J.M.).,Department of Physiology and Cell Biology, Ohio State University, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., P.J.M.)
| | - Omer Cavus
- From the Ohio State University College of Medicine and Wexner Medical Center, The Frick Center for Heart Failure and Arrhythmia, The Dorothy M. Davis Heart and Lung Research Institute, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., D.G., E.B., T.J.H., P.J.M.).,Department of Physiology and Cell Biology, Ohio State University, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., P.J.M.)
| | - Sara N Koenig
- From the Ohio State University College of Medicine and Wexner Medical Center, The Frick Center for Heart Failure and Arrhythmia, The Dorothy M. Davis Heart and Lung Research Institute, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., D.G., E.B., T.J.H., P.J.M.).,Department of Physiology and Cell Biology, Ohio State University, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., P.J.M.)
| | - Michael J Wallace
- From the Ohio State University College of Medicine and Wexner Medical Center, The Frick Center for Heart Failure and Arrhythmia, The Dorothy M. Davis Heart and Lung Research Institute, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., D.G., E.B., T.J.H., P.J.M.).,Department of Physiology and Cell Biology, Ohio State University, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., P.J.M.)
| | - Daniel Gratz
- From the Ohio State University College of Medicine and Wexner Medical Center, The Frick Center for Heart Failure and Arrhythmia, The Dorothy M. Davis Heart and Lung Research Institute, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., D.G., E.B., T.J.H., P.J.M.).,Department of Biomedical Engineering, Ohio State University College of Engineering, Columbus (D.G., T.J.H.)
| | - Elisa Bradley
- From the Ohio State University College of Medicine and Wexner Medical Center, The Frick Center for Heart Failure and Arrhythmia, The Dorothy M. Davis Heart and Lung Research Institute, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., D.G., E.B., T.J.H., P.J.M.).,Department of Internal Medicine, Ohio State University College of Medicine, Columbus (E.B., T.J.H., P.J.M.)
| | - Katherina M Alsina
- Department of Molecular Physiology and Biophysics (K.M.A.), Baylor College of Medicine, Houston, TX.,Division of Cardiology, Department of Medicine (K.M.A.), Baylor College of Medicine, Houston, TX.,Division of Cardiology, Department of Pediatrics (K.M.A.), Baylor College of Medicine, Houston, TX
| | - Xander H T Wehrens
- Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX (X.H.T.W.)
| | - Thomas J Hund
- From the Ohio State University College of Medicine and Wexner Medical Center, The Frick Center for Heart Failure and Arrhythmia, The Dorothy M. Davis Heart and Lung Research Institute, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., D.G., E.B., T.J.H., P.J.M.).,Department of Internal Medicine, Ohio State University College of Medicine, Columbus (E.B., T.J.H., P.J.M.).,Department of Biomedical Engineering, Ohio State University College of Engineering, Columbus (D.G., T.J.H.)
| | - Peter J Mohler
- From the Ohio State University College of Medicine and Wexner Medical Center, The Frick Center for Heart Failure and Arrhythmia, The Dorothy M. Davis Heart and Lung Research Institute, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., D.G., E.B., T.J.H., P.J.M.).,Department of Internal Medicine, Ohio State University College of Medicine, Columbus (E.B., T.J.H., P.J.M.).,Department of Physiology and Cell Biology, Ohio State University, Columbus (M.E.R., H.M., N.P.M., E.R.L., M.S., M.H., O.C., S.N.K., M.J.W., P.J.M.)
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11
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Lubbers ER, Murphy NP, Musa H, Huang CYM, Gupta R, Price MV, Han M, Daoud GE, Gratz D, El Refaey M, Xu X, Hoeflinger NK, Friel EL, Lancione P, Wallace MJ, Cavus O, Simmons SL, Williams JL, Skaf M, Koenig SN, Janssen PML, Rasband MN, Hund TJ, Mohler PJ. Correction: Defining new mechanistic roles for α II spectrin in cardiac function. J Biol Chem 2019; 294:15557. [PMID: 31628198 DOI: 10.1074/jbc.aac119.011151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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12
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Lubbers ER, Murphy NP, Musa H, Huang CYM, Gupta R, Price MV, Han M, Daoud G, Gratz D, El Refaey M, Xu X, Hoeflinger NK, Friel EL, Lancione P, Wallace MJ, Cavus O, Simmons SL, Williams JL, Skaf M, Koenig SN, Janssen PML, Rasband MN, Hund TJ, Mohler PJ. Defining new mechanistic roles for αII spectrin in cardiac function. J Biol Chem 2019; 294:9576-9591. [PMID: 31064843 PMCID: PMC6579463 DOI: 10.1074/jbc.ra119.007714] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 04/22/2019] [Indexed: 01/04/2023] Open
Abstract
Spectrins are cytoskeletal proteins essential for membrane biogenesis and regulation and serve critical roles in protein targeting and cellular signaling. αII spectrin (SPTAN1) is one of two α spectrin genes and αII spectrin dysfunction is linked to alterations in axon initial segment formation, cortical lamination, and neuronal excitability. Furthermore, human αII spectrin loss-of-function variants cause neurological disease. As global αII spectrin knockout mice are embryonic lethal, the in vivo roles of αII spectrin in adult heart are unknown and untested. Here, based on pronounced alterations in αII spectrin regulation in human heart failure we tested the in vivo roles of αII spectrin in the vertebrate heart. We created a mouse model of cardiomyocyte-selective αII spectrin-deficiency (cKO) and used this model to define the roles of αII spectrin in cardiac function. αII spectrin cKO mice displayed significant structural, cellular, and electrical phenotypes that resulted in accelerated structural remodeling, fibrosis, arrhythmia, and mortality in response to stress. At the molecular level, we demonstrate that αII spectrin plays a nodal role for global cardiac spectrin regulation, as αII spectrin cKO hearts exhibited remodeling of αI spectrin and altered β-spectrin expression and localization. At the cellular level, αII spectrin deficiency resulted in altered expression, targeting, and regulation of cardiac ion channels NaV1.5 and KV4.3. In summary, our findings define critical and unexpected roles for the multifunctional αII spectrin protein in the heart. Furthermore, our work provides a new in vivo animal model to study the roles of αII spectrin in the cardiomyocyte.
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Affiliation(s)
- Ellen R Lubbers
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
- Medical Scientist Training Program
- the Departments of Physiology and Cell Biology and
| | - Nathaniel P Murphy
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
- Medical Scientist Training Program
- the Departments of Physiology and Cell Biology and
| | - Hassan Musa
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
| | - Claire Yu-Mei Huang
- the Department of Neuroscience and Integrative Molecular and Biomedical Sciences Graduate Program, Baylor College of Medicine, Houston, Texas 77030, and
| | - Rohan Gupta
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
| | - Morgan V Price
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
| | - Mei Han
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
| | - Georges Daoud
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
| | - Daniel Gratz
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
- the Department of Biomedical Engineering, The Ohio State University, Columbus, Ohio 432310
| | - Mona El Refaey
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
| | - Xianyao Xu
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
| | - Nicole K Hoeflinger
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
| | - Emma L Friel
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
| | - Peter Lancione
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
| | - Michael J Wallace
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
| | - Omer Cavus
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
| | - Samantha L Simmons
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
| | - Jordan L Williams
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
| | - Michel Skaf
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
| | - Sara N Koenig
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
| | - Paul M L Janssen
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
- the Departments of Physiology and Cell Biology and
- Internal Medicine, Division of Cardiovascular Medicine, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, Ohio 432310
| | - Matthew N Rasband
- the Department of Neuroscience and Integrative Molecular and Biomedical Sciences Graduate Program, Baylor College of Medicine, Houston, Texas 77030, and
| | - Thomas J Hund
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia
- the Department of Biomedical Engineering, The Ohio State University, Columbus, Ohio 432310
- Internal Medicine, Division of Cardiovascular Medicine, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, Ohio 432310
| | - Peter J Mohler
- From the Dorothy M. Davis Heart and Lung Research Institute and Frick Center for Heart Failure and Arrhythmia,
- the Departments of Physiology and Cell Biology and
- Internal Medicine, Division of Cardiovascular Medicine, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, Ohio 432310
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13
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El Refaey M, Musa H, Smith SA, Binkley PF, Bradley E, Hund TJ, Mohler PJ. Response by El Refaey et al to Letter Regarding Article, "Protein Phosphatase 2A Regulates Cardiac Na + Channels". Circ Res 2019; 124:e60-e61. [PMID: 30973807 DOI: 10.1161/circresaha.119.314938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Mona El Refaey
- The Dorothy M. Davis Heart & Lung Research Institute, The Frick Center for Heart Failure and Arrhythmia, Department of Physiology and Cell Biology, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH
| | - Hassan Musa
- The Dorothy M. Davis Heart & Lung Research Institute, The Frick Center for Heart Failure and Arrhythmia, Department of Physiology and Cell Biology, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH
| | - Sakima A Smith
- The Dorothy M. Davis Heart & Lung Research Institute, The Frick Center for Heart Failure and Arrhythmia, Department of Internal Medicine, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH
| | - Philip F Binkley
- The Dorothy M. Davis Heart & Lung Research Institute, The Frick Center for Heart Failure and Arrhythmia, Department of Internal Medicine, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH
| | - Elisa Bradley
- The Dorothy M. Davis Heart & Lung Research Institute, The Frick Center for Heart Failure and Arrhythmia, Department of Internal Medicine, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH
| | - Thomas J Hund
- The Dorothy M. Davis Heart & Lung Research Institute, The Frick Center for Heart Failure and Arrhythmia, Department of Biomedical Engineering, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH
| | - Peter J Mohler
- The Dorothy M. Davis Heart & Lung Research Institute, The Frick Center for Heart Failure and Arrhythmia, Department of Internal Medicine, Department of Physiology and Cell Biology, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH
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Refaey ME, McGee-Lawrence ME, Fulzele S, Kennedy EJ, Bollag WB, Elsalanty M, Zhong Q, Ding KH, Bendzunas NG, Shi XM, Xu J, Hill WD, Johnson MH, Hunter M, Pierce JL, Yu K, Hamrick MW, Isales CM. Kynurenine, a Tryptophan Metabolite That Accumulates With Age, Induces Bone Loss. J Bone Miner Res 2017; 32:2182-2193. [PMID: 28727234 PMCID: PMC5685888 DOI: 10.1002/jbmr.3224] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 07/07/2017] [Accepted: 07/19/2017] [Indexed: 12/19/2022]
Abstract
Age-dependent bone loss occurs in humans and in several animal species, including rodents. The underlying causal mechanisms are probably multifactorial, although an age-associated increase in the generation of reactive oxygen species has been frequently implicated. We previously reported that aromatic amino acids function as antioxidants, are anabolic for bone, and that they may potentially play a protective role in an aging environment. We hypothesized that upon oxidation the aromatic amino acids would not only lose their anabolic effects but also potentially become a catabolic byproduct. When measured in vivo in C57BL/6 mice, the tryptophan oxidation product and kynurenine precursor, N-formylkynurenine (NFK), was found to increase with age. We tested the direct effects of feeding kynurenine (kyn) on bone mass and also tested the short-term effects of intraperitoneal kyn injection on bone turnover in CD-1 mice. μCT analyses showed kyn-induced bone loss. Levels of serum markers of osteoclastic activity (pyridinoline [PYD] and RANKL) increased significantly with kyn treatment. In addition, histological and histomorphometric studies showed an increase in osteoclastic activity in the kyn-treated groups in both dietary and injection-based studies. Further, kyn treatment significantly increased bone marrow adiposity, and BMSCs isolated from the kyn-injected mice exhibited decreased mRNA expression of Hdac3 and its cofactor NCoR1 and increased expression of lipid storage genes Cidec and Plin1. A similar pattern of gene expression is observed with aging. In summary, our data show that increasing kyn levels results in accelerated skeletal aging by impairing osteoblastic differentiation and increasing osteoclastic resorption. These data would suggest that kyn could play a role in age-induced bone loss. © 2017 American Society for Bone and Mineral Research.
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Affiliation(s)
- Mona El Refaey
- Institute for Regenerative and Reparative Medicine, Augusta University, Augusta, GA, USA.,Department of Neuroscience and Regenerative Medicine, Augusta University, Augusta, GA, USA
| | - Meghan E McGee-Lawrence
- Institute for Regenerative and Reparative Medicine, Augusta University, Augusta, GA, USA.,Department of Orthopaedic Surgery, Augusta University, Augusta, GA, USA.,Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, USA
| | - Sadanand Fulzele
- Department of Orthopaedic Surgery, Augusta University, Augusta, GA, USA
| | - Eileen J Kennedy
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia College of Pharmacy, Athens, GA, USA
| | - Wendy B Bollag
- Institute for Regenerative and Reparative Medicine, Augusta University, Augusta, GA, USA.,Department of Orthopaedic Surgery, Augusta University, Augusta, GA, USA.,Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, USA.,Department of Physiology, Augusta University, Augusta, GA, USA.,Department of Oral Biology, Augusta University, Augusta, GA, USA.,Department of Medicine, Augusta University, Augusta, GA, USA.,Charlie Norwood VA Medical Center, Augusta, GA, USA
| | - Mohammed Elsalanty
- Institute for Regenerative and Reparative Medicine, Augusta University, Augusta, GA, USA.,Department of Oral Biology, Augusta University, Augusta, GA, USA
| | - Qing Zhong
- Institute for Regenerative and Reparative Medicine, Augusta University, Augusta, GA, USA.,Department of Neuroscience and Regenerative Medicine, Augusta University, Augusta, GA, USA
| | - Ke-Hong Ding
- Institute for Regenerative and Reparative Medicine, Augusta University, Augusta, GA, USA.,Department of Neuroscience and Regenerative Medicine, Augusta University, Augusta, GA, USA
| | - Nathaniel G Bendzunas
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia College of Pharmacy, Athens, GA, USA
| | - Xing-Ming Shi
- Institute for Regenerative and Reparative Medicine, Augusta University, Augusta, GA, USA.,Department of Neuroscience and Regenerative Medicine, Augusta University, Augusta, GA, USA.,Department of Orthopaedic Surgery, Augusta University, Augusta, GA, USA
| | - Jianrui Xu
- Institute for Regenerative and Reparative Medicine, Augusta University, Augusta, GA, USA.,Department of Neuroscience and Regenerative Medicine, Augusta University, Augusta, GA, USA
| | - William D Hill
- Institute for Regenerative and Reparative Medicine, Augusta University, Augusta, GA, USA.,Department of Orthopaedic Surgery, Augusta University, Augusta, GA, USA.,Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, USA.,Charlie Norwood VA Medical Center, Augusta, GA, USA
| | - Maribeth H Johnson
- Department of Biostatistics and Epidemiology, Augusta University, Augusta, GA, USA
| | - Monte Hunter
- Department of Orthopaedic Surgery, Augusta University, Augusta, GA, USA
| | - Jessica L Pierce
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, USA
| | - Kanglun Yu
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, USA
| | - Mark W Hamrick
- Institute for Regenerative and Reparative Medicine, Augusta University, Augusta, GA, USA.,Department of Orthopaedic Surgery, Augusta University, Augusta, GA, USA.,Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, USA
| | - Carlos M Isales
- Institute for Regenerative and Reparative Medicine, Augusta University, Augusta, GA, USA.,Department of Neuroscience and Regenerative Medicine, Augusta University, Augusta, GA, USA.,Department of Orthopaedic Surgery, Augusta University, Augusta, GA, USA.,Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, USA.,Department of Medicine, Augusta University, Augusta, GA, USA
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15
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El Refaey M, Xu L, Gao Y, Canan BD, Adesanya TMA, Warner SC, Akagi K, Symer DE, Mohler PJ, Ma J, Janssen PML, Han R. In Vivo Genome Editing Restores Dystrophin Expression and Cardiac Function in Dystrophic Mice. Circ Res 2017; 121:923-929. [PMID: 28790199 PMCID: PMC5623072 DOI: 10.1161/circresaha.117.310996] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 08/03/2017] [Accepted: 08/07/2017] [Indexed: 01/16/2023]
Abstract
RATIONALE Duchenne muscular dystrophy is a severe inherited form of muscular dystrophy caused by mutations in the reading frame of the dystrophin gene disrupting its protein expression. Dystrophic cardiomyopathy is a leading cause of death in Duchenne muscular dystrophy patients, and currently no effective treatment exists to halt its progression. Recent advancement in genome editing technologies offers a promising therapeutic approach in restoring dystrophin protein expression. However, the impact of this approach on Duchenne muscular dystrophy cardiac function has yet to be evaluated. Therefore, we assessed the therapeutic efficacy of CRISPR (clustered regularly interspaced short palindromic repeats)-mediated genome editing on dystrophin expression and cardiac function in mdx/Utr +/- mice after a single systemic delivery of recombinant adeno-associated virus. OBJECTIVE To examine the efficiency and physiological impact of CRISPR-mediated genome editing on cardiac dystrophin expression and function in dystrophic mice. METHODS AND RESULTS Here, we packaged SaCas9 (clustered regularly interspaced short palindromic repeat-associated 9 from Staphylococcus aureus) and guide RNA constructs into an adeno-associated virus vector and systemically delivered them to mdx/Utr +/- neonates. We showed that CRIPSR-mediated genome editing efficiently excised the mutant exon 23 in dystrophic mice, and immunofluorescence data supported the restoration of dystrophin protein expression in dystrophic cardiac muscles to a level approaching 40%. Moreover, there was a noted restoration in the architecture of cardiac muscle fibers and a reduction in the extent of fibrosis in dystrophin-deficient hearts. The contractility of cardiac papillary muscles was also restored in CRISPR-edited cardiac muscles compared with untreated controls. Furthermore, our targeted deep sequencing results confirmed that our adeno-associated virus-CRISPR/Cas9 strategy was very efficient in deleting the ≈23 kb of intervening genomic sequences. CONCLUSIONS This study provides evidence for using CRISPR-based genome editing as a potential therapeutic approach for restoring dystrophic cardiomyopathy structurally and functionally.
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MESH Headings
- Animals
- CRISPR-Associated Proteins/genetics
- CRISPR-Associated Proteins/metabolism
- CRISPR-Cas Systems
- Cardiomyopathies/genetics
- Cardiomyopathies/metabolism
- Cardiomyopathies/physiopathology
- Cardiomyopathies/therapy
- Clustered Regularly Interspaced Short Palindromic Repeats
- Dependovirus/genetics
- Disease Models, Animal
- Dystrophin/genetics
- Dystrophin/metabolism
- Exons
- Fibrosis
- Gene Editing/methods
- Gene Expression Regulation
- Genetic Predisposition to Disease
- Genetic Therapy/methods
- Genetic Vectors
- High-Throughput Nucleotide Sequencing
- Mice, Inbred mdx
- Muscular Dystrophy, Duchenne/genetics
- Muscular Dystrophy, Duchenne/metabolism
- Muscular Dystrophy, Duchenne/physiopathology
- Muscular Dystrophy, Duchenne/therapy
- Mutation
- Myocardial Contraction
- Papillary Muscles/metabolism
- Papillary Muscles/pathology
- Papillary Muscles/physiopathology
- Phenotype
- RNA, Guide, CRISPR-Cas Systems/genetics
- RNA, Guide, CRISPR-Cas Systems/metabolism
- Recovery of Function
- Utrophin/genetics
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Affiliation(s)
- Mona El Refaey
- From the Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program (M.E.R., L.X., Y.G., T.M.A.A., J.M., R.H.) and Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute (B.D.C., P.J.M., P.M.L.J.), The Ohio State University Wexner Medical Center, Columbus; Genomics Shared Resource, The Ohio State University Comprehensive Cancer Center, Columbus (S.C.W., D.E.S.); and Department of Cancer Biology and Genetics (K.A., D.E.S.) and Human Cancer Genetics Program, and Department of Biomedical Informatics (adjunct) (D.E.S.), The Ohio State University, Columbus
| | - Li Xu
- From the Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program (M.E.R., L.X., Y.G., T.M.A.A., J.M., R.H.) and Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute (B.D.C., P.J.M., P.M.L.J.), The Ohio State University Wexner Medical Center, Columbus; Genomics Shared Resource, The Ohio State University Comprehensive Cancer Center, Columbus (S.C.W., D.E.S.); and Department of Cancer Biology and Genetics (K.A., D.E.S.) and Human Cancer Genetics Program, and Department of Biomedical Informatics (adjunct) (D.E.S.), The Ohio State University, Columbus
| | - Yandi Gao
- From the Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program (M.E.R., L.X., Y.G., T.M.A.A., J.M., R.H.) and Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute (B.D.C., P.J.M., P.M.L.J.), The Ohio State University Wexner Medical Center, Columbus; Genomics Shared Resource, The Ohio State University Comprehensive Cancer Center, Columbus (S.C.W., D.E.S.); and Department of Cancer Biology and Genetics (K.A., D.E.S.) and Human Cancer Genetics Program, and Department of Biomedical Informatics (adjunct) (D.E.S.), The Ohio State University, Columbus
| | - Benjamin D Canan
- From the Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program (M.E.R., L.X., Y.G., T.M.A.A., J.M., R.H.) and Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute (B.D.C., P.J.M., P.M.L.J.), The Ohio State University Wexner Medical Center, Columbus; Genomics Shared Resource, The Ohio State University Comprehensive Cancer Center, Columbus (S.C.W., D.E.S.); and Department of Cancer Biology and Genetics (K.A., D.E.S.) and Human Cancer Genetics Program, and Department of Biomedical Informatics (adjunct) (D.E.S.), The Ohio State University, Columbus
| | - T M Ayodele Adesanya
- From the Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program (M.E.R., L.X., Y.G., T.M.A.A., J.M., R.H.) and Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute (B.D.C., P.J.M., P.M.L.J.), The Ohio State University Wexner Medical Center, Columbus; Genomics Shared Resource, The Ohio State University Comprehensive Cancer Center, Columbus (S.C.W., D.E.S.); and Department of Cancer Biology and Genetics (K.A., D.E.S.) and Human Cancer Genetics Program, and Department of Biomedical Informatics (adjunct) (D.E.S.), The Ohio State University, Columbus
| | - Sarah C Warner
- From the Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program (M.E.R., L.X., Y.G., T.M.A.A., J.M., R.H.) and Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute (B.D.C., P.J.M., P.M.L.J.), The Ohio State University Wexner Medical Center, Columbus; Genomics Shared Resource, The Ohio State University Comprehensive Cancer Center, Columbus (S.C.W., D.E.S.); and Department of Cancer Biology and Genetics (K.A., D.E.S.) and Human Cancer Genetics Program, and Department of Biomedical Informatics (adjunct) (D.E.S.), The Ohio State University, Columbus
| | - Keiko Akagi
- From the Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program (M.E.R., L.X., Y.G., T.M.A.A., J.M., R.H.) and Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute (B.D.C., P.J.M., P.M.L.J.), The Ohio State University Wexner Medical Center, Columbus; Genomics Shared Resource, The Ohio State University Comprehensive Cancer Center, Columbus (S.C.W., D.E.S.); and Department of Cancer Biology and Genetics (K.A., D.E.S.) and Human Cancer Genetics Program, and Department of Biomedical Informatics (adjunct) (D.E.S.), The Ohio State University, Columbus
| | - David E Symer
- From the Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program (M.E.R., L.X., Y.G., T.M.A.A., J.M., R.H.) and Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute (B.D.C., P.J.M., P.M.L.J.), The Ohio State University Wexner Medical Center, Columbus; Genomics Shared Resource, The Ohio State University Comprehensive Cancer Center, Columbus (S.C.W., D.E.S.); and Department of Cancer Biology and Genetics (K.A., D.E.S.) and Human Cancer Genetics Program, and Department of Biomedical Informatics (adjunct) (D.E.S.), The Ohio State University, Columbus
| | - Peter J Mohler
- From the Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program (M.E.R., L.X., Y.G., T.M.A.A., J.M., R.H.) and Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute (B.D.C., P.J.M., P.M.L.J.), The Ohio State University Wexner Medical Center, Columbus; Genomics Shared Resource, The Ohio State University Comprehensive Cancer Center, Columbus (S.C.W., D.E.S.); and Department of Cancer Biology and Genetics (K.A., D.E.S.) and Human Cancer Genetics Program, and Department of Biomedical Informatics (adjunct) (D.E.S.), The Ohio State University, Columbus
| | - Jianjie Ma
- From the Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program (M.E.R., L.X., Y.G., T.M.A.A., J.M., R.H.) and Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute (B.D.C., P.J.M., P.M.L.J.), The Ohio State University Wexner Medical Center, Columbus; Genomics Shared Resource, The Ohio State University Comprehensive Cancer Center, Columbus (S.C.W., D.E.S.); and Department of Cancer Biology and Genetics (K.A., D.E.S.) and Human Cancer Genetics Program, and Department of Biomedical Informatics (adjunct) (D.E.S.), The Ohio State University, Columbus
| | - Paul M L Janssen
- From the Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program (M.E.R., L.X., Y.G., T.M.A.A., J.M., R.H.) and Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute (B.D.C., P.J.M., P.M.L.J.), The Ohio State University Wexner Medical Center, Columbus; Genomics Shared Resource, The Ohio State University Comprehensive Cancer Center, Columbus (S.C.W., D.E.S.); and Department of Cancer Biology and Genetics (K.A., D.E.S.) and Human Cancer Genetics Program, and Department of Biomedical Informatics (adjunct) (D.E.S.), The Ohio State University, Columbus
| | - Renzhi Han
- From the Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program (M.E.R., L.X., Y.G., T.M.A.A., J.M., R.H.) and Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute (B.D.C., P.J.M., P.M.L.J.), The Ohio State University Wexner Medical Center, Columbus; Genomics Shared Resource, The Ohio State University Comprehensive Cancer Center, Columbus (S.C.W., D.E.S.); and Department of Cancer Biology and Genetics (K.A., D.E.S.) and Human Cancer Genetics Program, and Department of Biomedical Informatics (adjunct) (D.E.S.), The Ohio State University, Columbus.
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Xu L, Refaey ME, Zhao L, Xu J, Gao Y, Han R. 577. Empower Multiplex CRISPR-Mediated Gene Manipulation with Self-Cleaving Ribozymes and tRNA. Mol Ther 2016. [DOI: 10.1016/s1525-0016(16)33385-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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17
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Xu L, Park KH, Zhao L, Xu J, El Refaey M, Gao Y, Zhu H, Ma J, Han R. CRISPR-mediated Genome Editing Restores Dystrophin Expression and Function in mdx Mice. Mol Ther 2016; 24:564-9. [PMID: 26449883 PMCID: PMC4786912 DOI: 10.1038/mt.2015.192] [Citation(s) in RCA: 173] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 10/05/2015] [Indexed: 12/13/2022] Open
Abstract
Duchenne muscular dystrophy (DMD) is a degenerative muscle disease caused by genetic mutations that lead to the disruption of dystrophin in muscle fibers. There is no curative treatment for this devastating disease. Clustered regularly interspaced short palindromic repeat/Cas9 (CRISPR/Cas9) has emerged as a powerful tool for genetic manipulation and potential therapy. Here we demonstrate that CRIPSR-mediated genome editing efficiently excised a 23-kb genomic region on the X-chromosome covering the mutant exon 23 in a mouse model of DMD, and restored dystrophin expression and the dystrophin-glycoprotein complex at the sarcolemma of skeletal muscles in live mdx mice. Electroporation-mediated transfection of the Cas9/gRNA constructs in the skeletal muscles of mdx mice normalized the calcium sparks in response to osmotic shock. Adenovirus-mediated transduction of Cas9/gRNA greatly reduced the Evans blue dye uptake of skeletal muscles at rest and after downhill treadmill running. This study provides proof evidence for permanent gene correction in DMD.
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Affiliation(s)
- Li Xu
- Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program, The Ohio State University Wexner Medical Center, Columbus, Ohio, United States
| | - Ki Ho Park
- Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program, The Ohio State University Wexner Medical Center, Columbus, Ohio, United States
| | - Lixia Zhao
- Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program, The Ohio State University Wexner Medical Center, Columbus, Ohio, United States
| | - Jing Xu
- Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program, The Ohio State University Wexner Medical Center, Columbus, Ohio, United States
| | - Mona El Refaey
- Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program, The Ohio State University Wexner Medical Center, Columbus, Ohio, United States
| | - Yandi Gao
- Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program, The Ohio State University Wexner Medical Center, Columbus, Ohio, United States
| | - Hua Zhu
- Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program, The Ohio State University Wexner Medical Center, Columbus, Ohio, United States
| | - Jianjie Ma
- Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program, The Ohio State University Wexner Medical Center, Columbus, Ohio, United States
| | - Renzhi Han
- Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program, The Ohio State University Wexner Medical Center, Columbus, Ohio, United States
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18
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Xu J, El Refaey M, Xu L, Zhao L, Gao Y, Floyd K, Karaze T, Janssen PML, Han R. Genetic disruption of Ano5 in mice does not recapitulate human ANO5-deficient muscular dystrophy. Skelet Muscle 2015; 5:43. [PMID: 26693275 PMCID: PMC4685631 DOI: 10.1186/s13395-015-0069-z] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 11/17/2015] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Anoctamin 5 (ANO5) is a member of a conserved gene family (TMEM16), which codes for proteins predicted to have eight transmembrane domains and putative Ca(2+)-activated chloride channel (CaCC) activity. It was recently reported that mutations in this gene result in the development of limb girdle muscular dystrophy type 2L (LGMD2L), Miyoshi myopathy type 3 (MMD3), or gnathodiaphyseal dysplasia 1 (GDD1). Currently, there is a lack of animal models for the study of the physiological function of Ano5 and the disease pathology in its absence. RESULTS Here, we report the generation and characterization of the first Ano5-knockout (KO) mice. Our data demonstrate that the KO mice did not present overt skeletal or cardiac muscle pathology at rest conditions from birth up to 18 months of age. There were no significant differences in force production or force deficit following repeated eccentric contractions between wild type (WT) and KO mice. Although cardiac hypertrophy developed similarly in both KO and WT mice after daily isoproterenol (ISO, 100 mg/kg) treatment via intraperitoneal injection for 2 weeks, they were functionally indiscernible. However, microarray analysis identified the genes involved in lipid metabolism, and complement pathways were altered in the KO skeletal muscle. CONCLUSIONS Taken together, these data provide the evidence to show that genetic ablation of Ano5 in C57BL/6J mice does not cause overt pathology in skeletal and cardiac muscles, but Ano5 deficiency may lead to altered lipid metabolism and inflammation signaling.
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Affiliation(s)
- Jing Xu
- Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program, The Ohio State University Wexner Medical Center, Columbus, OH 43210 USA
| | - Mona El Refaey
- Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program, The Ohio State University Wexner Medical Center, Columbus, OH 43210 USA
| | - Li Xu
- Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program, The Ohio State University Wexner Medical Center, Columbus, OH 43210 USA
| | - Lixia Zhao
- Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program, The Ohio State University Wexner Medical Center, Columbus, OH 43210 USA
| | - Yandi Gao
- Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program, The Ohio State University Wexner Medical Center, Columbus, OH 43210 USA
| | - Kyle Floyd
- Department of Physiology and Cell Biology, Department of Internal Medicine, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210 USA
| | - Tallib Karaze
- Department of Physiology and Cell Biology, Department of Internal Medicine, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210 USA
| | - Paul M L Janssen
- Department of Physiology and Cell Biology, Department of Internal Medicine, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210 USA
| | - Renzhi Han
- Department of Surgery, Davis Heart and Lung Research Institute, Biomedical Sciences Graduate Program, Biophysics Graduate Program, The Ohio State University Wexner Medical Center, Columbus, OH 43210 USA
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Howie RN, Bhattacharyya M, Salama ME, Refaey ME, Isales C, Borke J, Daoudi A, Medani F, Elsalanty ME. Removal of pamidronate from bone in rats using systemic and local chelation. Arch Oral Biol 2015; 60:1699-707. [PMID: 26431826 PMCID: PMC4636948 DOI: 10.1016/j.archoralbio.2015.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 08/14/2015] [Accepted: 09/03/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVES Bisphosphonates become adsorbed on hydroxyapatite crystals in the bone matrix. In case of side-effects, stopping the treatment would not affect the bisphosphonates already deposited in bone. This study tests the feasibility of in-vivo targeted removal of bisphosphonates from bone using chelating agents. DESIGN 32 Sprague Dawley rats were given an injection of fluorescent pamidronate (OsteoSense EX; 0.16nmol/g). They were treated with either systemic (cadmium) or local [ethylenediaminetetraacetic (EDTA) or citric acid (CA)] chelating agents to induce the removal of the bisphosphonate from bone. We evaluated the decrease in fluorescence in the alveolar bone, femur, tibia, and vertebrae. We also analyzed the systemic effects of treatment. RESULTS Systemic chelation reduced the pamidronate signal universally. However, the maximum reduction was observed in the alveolar bone and femur (22% and 21%, p values 0.008 and 0.028, respectively). Systemic chelation did not impair calcium homeostasis. The chelation effect was not due to a systemic toxic effect on the liver or kidney. On the other hand local chelation at the extraction site significantly (p=0.011) decreased the pamidronate signal at bony surfaces of the socket. CONCLUSIONS Systemic and local chelating agents can remove bisphosphonate from bone. This study establishes a new concept for the prevention of side effects of bisphosphonates during high-risk situations.
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Affiliation(s)
| | | | | | | | | | - James Borke
- Western University of Health Sciences, Pomona, CA, USA
| | - Asma Daoudi
- Georgia Regents University, Augusta, GA, USA
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El Refaey M, Watkins CP, Kennedy EJ, Chang A, Zhong Q, Ding KH, Shi XM, Xu J, Bollag WB, Hill WD, Johnson M, Hunter M, Hamrick MW, Isales CM. Oxidation of the aromatic amino acids tryptophan and tyrosine disrupts their anabolic effects on bone marrow mesenchymal stem cells. Mol Cell Endocrinol 2015; 410:87-96. [PMID: 25637715 PMCID: PMC4444384 DOI: 10.1016/j.mce.2015.01.034] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 01/23/2015] [Accepted: 01/23/2015] [Indexed: 02/06/2023]
Abstract
Age-induced bone loss is associated with greater bone resorption and decreased bone formation resulting in osteoporosis and osteoporosis-related fractures. The etiology of this age-induced bone loss is not clear but has been associated with increased generation of reactive oxygen species (ROS) from leaky mitochondria. ROS are known to oxidize/damage the surrounding proteins/amino acids/enzymes and thus impair their normal function. Among the amino acids, the aromatic amino acids are particularly prone to modification by oxidation. Since impaired osteoblastic differentiation from bone marrow mesenchymal stem cells (BMMSCs) plays a role in age-related bone loss, we wished to examine whether oxidized amino acids (in particular the aromatic amino acids) modulated BMMSC function. Using mouse BMMSCs, we examined the effects of the oxidized amino acids di-tyrosine and kynurenine on proliferation, differentiation and Mitogen-Activated Protein Kinase (MAPK) pathway. Our data demonstrate that amino acid oxides (in particular kynurenine) inhibited BMMSC proliferation, alkaline phosphatase expression and activity and the expression of osteogenic markers (Osteocalcin and Runx2). Taken together, our data are consistent with a potential pathogenic role for oxidized amino acids in age-induced bone loss.
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Affiliation(s)
- Mona El Refaey
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, GA, United States; Department of Neuroscience and Regenerative Medicine, Georgia Regents University, Augusta, GA, United States
| | - Christopher P Watkins
- Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy University of Georgia, Athens, GA 30602, United States
| | - Eileen J Kennedy
- Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy University of Georgia, Athens, GA 30602, United States
| | - Andrew Chang
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, GA, United States
| | - Qing Zhong
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, GA, United States; Department of Neuroscience and Regenerative Medicine, Georgia Regents University, Augusta, GA, United States
| | - Ke-Hong Ding
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, GA, United States; Department of Neuroscience and Regenerative Medicine, Georgia Regents University, Augusta, GA, United States
| | - Xing-ming Shi
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, GA, United States; Department of Neuroscience and Regenerative Medicine, Georgia Regents University, Augusta, GA, United States; Department of Orthopaedic Surgery, Georgia Regents University, Augusta, GA, United States
| | - Jianrui Xu
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, GA, United States; Department of Medicine, Georgia Regents University, Augusta, GA, United States
| | - Wendy B Bollag
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, GA, United States; Department of Physiology, Georgia Regents University, Augusta, GA, United States; Charlie Norwood VA Medical Center, Augusta, GA 30912, United States
| | - William D Hill
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, GA, United States; Department of Orthopaedic Surgery, Georgia Regents University, Augusta, GA, United States; Charlie Norwood VA Medical Center, Augusta, GA 30912, United States; Department of Cellular Biology and Anatomy, Georgia Regents University, Augusta, GA, United States
| | - Maribeth Johnson
- Department of Biostatistics, Georgia Regents University, Augusta, GA, United States
| | - Monte Hunter
- Department of Orthopaedic Surgery, Georgia Regents University, Augusta, GA, United States
| | - Mark W Hamrick
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, GA, United States; Department of Orthopaedic Surgery, Georgia Regents University, Augusta, GA, United States; Department of Cellular Biology and Anatomy, Georgia Regents University, Augusta, GA, United States
| | - Carlos M Isales
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, GA, United States; Department of Neuroscience and Regenerative Medicine, Georgia Regents University, Augusta, GA, United States; Department of Orthopaedic Surgery, Georgia Regents University, Augusta, GA, United States; Department of Medicine, Georgia Regents University, Augusta, GA, United States; Department of Cellular Biology and Anatomy, Georgia Regents University, Augusta, GA, United States.
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21
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Dukes A, Davis C, El Refaey M, Upadhyay S, Mork S, Arounleut P, Johnson MH, Hill WD, Isales CM, Hamrick MW. The aromatic amino acid tryptophan stimulates skeletal muscle IGF1/p70s6k/mTor signaling in vivo and the expression of myogenic genes in vitro. Nutrition 2015; 31:1018-24. [PMID: 26059377 DOI: 10.1016/j.nut.2015.02.011] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 01/22/2015] [Accepted: 02/11/2015] [Indexed: 12/13/2022]
Abstract
OBJECTIVES Nutrition plays a key role in the maintenance of muscle and bone mass, and dietary protein deficiency has in particular been associated with catabolism of both muscle and bone tissue. One mechanism thought to link protein deficiency with loss of muscle mass is deficiency in specific amino acids that play a role in muscle metabolism. The aim of this study was to test the hypothesis that the essential amino acid tryptophan, and its metabolite kynurenine, might directly affect muscle metabolism in the setting of protein deficiency. METHODS Adult mice (12 mo) were fed a normal diet (18% protein), as well as diets with low protein (8%) supplemented with increasing concentrations (50, 100, and 200 uM) of kynurenine (Kyn) or with tryptophan (Trp; 1.5 mM) for 8 weeks. Myoprogenitor cells were also treated with Trp and Kyn in vitro to determine their effects on cell proliferation and expression of myogenic differentiation markers. RESULTS All mice on the low-protein diets weighed less than the group fed normal protein (18%). Lean mass measured by dual-energy X-ray absorptiometry was lowest in mice on the high Kyn diet, whereas percent lean mass was highest in mice receiving Trp supplementation and percent body fat was lowest in mice receiving Trp. Enzyme-linked immunosorbent assays showed significant increases in skeletal muscle insulin-like growth factor-1, leptin, and the myostatin antagonist follistatin with Trp supplementation. mRNA microarray and gene pathway analysis performed on muscle samples demonstrate that mTor/eif4/p70s6k pathway molecules are significantly up-regulated in muscles from mice on Kyn and Trp supplementation. In vitro, neither amino acid affected proliferation of myoprogenitors, but Trp increased the expression of the myogenic markers MyoD, myogenin, and myosin heavy chain. CONCLUSION These findings suggest that dietary amino acids can directly affect molecular signaling in skeletal muscle, further indicating that dietary manipulation with specific amino acids could potentially attenuate muscle loss with dietary protein deficiency.
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Affiliation(s)
- Amy Dukes
- Georgia Regents University (Formerly Georgia Health Sciences University), Augusta, GA, USA
| | - Colleen Davis
- Georgia Regents University (Formerly Georgia Health Sciences University), Augusta, GA, USA
| | - Mona El Refaey
- Georgia Regents University (Formerly Georgia Health Sciences University), Augusta, GA, USA
| | - Sunil Upadhyay
- Georgia Regents University (Formerly Georgia Health Sciences University), Augusta, GA, USA
| | - Sarah Mork
- Georgia Regents University (Formerly Georgia Health Sciences University), Augusta, GA, USA
| | - Phonepasong Arounleut
- Georgia Regents University (Formerly Georgia Health Sciences University), Augusta, GA, USA
| | - Maribeth H Johnson
- Georgia Regents University (Formerly Georgia Health Sciences University), Augusta, GA, USA
| | - William D Hill
- Georgia Regents University (Formerly Georgia Health Sciences University), Augusta, GA, USA
| | - Carlos M Isales
- Georgia Regents University (Formerly Georgia Health Sciences University), Augusta, GA, USA
| | - Mark W Hamrick
- Georgia Regents University (Formerly Georgia Health Sciences University), Augusta, GA, USA.
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Refaey ME, Zhong Q, Ding KH, Shi XM, Xu J, Bollag WB, Hill WD, Chutkan N, Robbins R, Nadeau H, Johnson M, Hamrick MW, Isales CM. Impact of dietary aromatic amino acids on osteoclastic activity. Calcif Tissue Int 2014; 95:174-82. [PMID: 25000990 PMCID: PMC4104004 DOI: 10.1007/s00223-014-9878-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Accepted: 05/20/2014] [Indexed: 01/28/2023]
Abstract
We had shown that aromatic amino acid (phenylalanine, tyrosine, and tryptophan) supplementation prevented bone loss in an aging C57BL/6 mice model. In vivo results from the markers of bone breakdown suggested an inhibition of osteoclastic activity or differentiation. To assess osteoclastic differentiation, we examined the effects of aromatic amino acids on early /structural markers as vitronectin receptor, calcitonin receptor, and carbonic anhydrase II as well as, late/functional differentiation markers; cathepsin K and matrix metalloproteinase 9 (MMP-9). Our data demonstrate that the aromatic amino acids down-regulated early and late osteoclastic differentiation markers as measured by real time PCR. Our data also suggest a link between the vitronectin receptor and the secreted cathepsin K that both showed consistent effects to the aromatic amino acid treatment. However, the non-attachment related proteins, calcitonin receptor, and carbonic anhydrase II, demonstrated less consistent effects in response to treatment. Our data are consistent with aromatic amino acids down-regulating osteoclastic differentiation by suppressing remodeling gene expression thus contributing initially to the net increase in bone mass seen in vivo.
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Affiliation(s)
- Mona El Refaey
- Institute for Regenerative and Reparative Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
| | - Qing Zhong
- Institute for Regenerative and Reparative Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
- Departments of Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
| | - Ke-Hong Ding
- Institute for Regenerative and Reparative Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
- Departments of Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
| | - Xing-ming Shi
- Institute for Regenerative and Reparative Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
- Departments of Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
- Departments of Pathology, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
| | - Jianrui Xu
- Institute for Regenerative and Reparative Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
- Departments of Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
| | - Wendy B. Bollag
- Institute for Regenerative and Reparative Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
- Departments of Physiology, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
- Charlie Norwood VA Medical Center, Augusta, GA 30912 USA
| | - William D. Hill
- Institute for Regenerative and Reparative Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
- Department of Orthopaedic Surgery, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
- Departments of Cellular Biology and Anatomy, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
- Charlie Norwood VA Medical Center, Augusta, GA 30912 USA
| | - Norman Chutkan
- Institute for Regenerative and Reparative Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
- Department of Orthopaedic Surgery, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
| | - Richard Robbins
- Institute for Regenerative and Reparative Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
| | - Hugh Nadeau
- Institute for Regenerative and Reparative Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
| | - Maribeth Johnson
- Departments of Biostatistics, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
| | - Mark W. Hamrick
- Institute for Regenerative and Reparative Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
- Department of Orthopaedic Surgery, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
- Departments of Cellular Biology and Anatomy, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
| | - Carlos M. Isales
- Institute for Regenerative and Reparative Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
- Department of Orthopaedic Surgery, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
- Departments of Medicine, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
- Departments of Cellular Biology and Anatomy, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912 USA
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El Refaey M, Zhong Q, Hill WD, Shi XM, Hamrick MW, Bailey L, Johnson M, Xu J, Bollag WB, Chutkan N, Isales CM. Aromatic amino acid activation of signaling pathways in bone marrow mesenchymal stem cells depends on oxygen tension. PLoS One 2014; 9:e91108. [PMID: 24727733 PMCID: PMC3984069 DOI: 10.1371/journal.pone.0091108] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Accepted: 02/07/2014] [Indexed: 01/22/2023] Open
Abstract
The physiologic oxygen pressures inside the bone marrow environment are much lower than what is present in the peripheral circulation, ranging from 1-7%, compared to values as high as 10-13% in the arteries, lungs and liver. Thus, experiments done with bone marrow mesenchymal stem cells (BMMSCs) using standard culture conditions may not accurately reflect the true hypoxic bone marrow microenvironment. However, since aging is associated with an increased generation of reactive oxygen species, experiments done under 21%O2 conditions may actually more closely resemble that of the aging bone marrow environment. Aromatic amino acids are known to be natural anti-oxidants. We have previously reported that aromatic amino acids are potent agonists for stimulating increases in intracellular calcium and phospho-c-Raf and in promoting BMMSC differentiation down the osteogenic pathway. Our previous experiments were performed under normoxic conditions. Thus, we next decided to compare a normoxic (21% O2) vs. a hypoxic environment (3% O2) alone or after treatment with aromatic amino acids. Reverse-phase protein arrays showed that 3% O2 itself up-regulated proliferative pathways. Aromatic amino acids had no additional effect on signaling pathways under these conditions. However, under 21%O2 conditions, aromatic amino acids could now significantly increase these proliferative pathways over this "normoxic" baseline. Pharmacologic studies are consistent with the aromatic amino acids activating the extracellular calcium-sensing receptor. The effects of aromatic amino acids on BMMSC function in the 21% O2 environment is consistent with a potential role for these amino acids in an aging environment as functional anti oxidants.
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Affiliation(s)
- Mona El Refaey
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, Georgia, United States of America
| | - Qing Zhong
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, Georgia, United States of America
- Department of Medicine, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States of America
| | - William D. Hill
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, Georgia, United States of America
- Department of Orthopaedic Surgery, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States of America
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States of America
| | - Xing-Ming Shi
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, Georgia, United States of America
- Department of Orthopaedic Surgery, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States of America
- Department of Pathology, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States of America
| | - Mark W. Hamrick
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, Georgia, United States of America
- Department of Orthopaedic Surgery, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States of America
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States of America
| | - Lakiea Bailey
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, Georgia, United States of America
| | - Maribeth Johnson
- Department of Biostatistics, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States of America
| | - Jianrui Xu
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, Georgia, United States of America
- Department of Orthopaedic Surgery, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States of America
| | - Wendy B. Bollag
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, Georgia, United States of America
- Department of Physiology, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States of America
- Charlie Norwood VA Medical Center, Augusta, Georgia, United States of America
| | - Norman Chutkan
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, Georgia, United States of America
- Department of Orthopaedic Surgery, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States of America
| | - Carlos M. Isales
- Institute for Regenerative and Reparative Medicine, Georgia Regents University, Augusta, Georgia, United States of America
- Department of Medicine, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States of America
- Department of Orthopaedic Surgery, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States of America
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States of America
- * E-mail:
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