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Mead AF, Wood NB, Nelson SR, Palmer BM, Yang L, Previs SB, Ploysangngam A, Kennedy GG, McAdow JF, Tremble SM, Cipolla MJ, Ebert AM, Johnson AN, Gurnett CA, Previs MJ, Warshaw DM. Functional role of myosin-binding protein H in thick filaments of developing vertebrate fast-twitch skeletal muscle. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.10.593199. [PMID: 38798399 PMCID: PMC11118323 DOI: 10.1101/2024.05.10.593199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Myosin-binding protein H (MyBP-H) is a component of the vertebrate skeletal muscle sarcomere with sequence and domain homology to myosin-binding protein C (MyBP-C). Whereas skeletal muscle isoforms of MyBP-C (fMyBP-C, sMyBP-C) modulate muscle contractility via interactions with actin thin filaments and myosin motors within the muscle sarcomere "C-zone," MyBP-H has no known function. This is in part due to MyBP-H having limited expression in adult fast-twitch muscle and no known involvement in muscle disease. Quantitative proteomics reported here reveal MyBP-H is highly expressed in prenatal rat fast-twitch muscles and larval zebrafish, suggesting a conserved role in muscle development, and promoting studies to define its function. We take advantage of the genetic control of the zebrafish model and a combination of structural, functional, and biophysical techniques to interrogate the role of MyBP-H. Transgenic, FLAG-tagged MyBP-H or fMyBP-C both localize to the C-zones in larval myofibers, whereas genetic depletion of endogenous MyBP-H or fMyBP-C leads to increased accumulation of the other, suggesting competition for C-zone binding sites. Does MyBP-H modulate contractility from the C-zone? Globular domains critical to MyBP-C's modulatory functions are absent from MyBP-H, suggesting MyBP-H may be functionally silent. However, our results suggest an active role. Small angle x-ray diffraction of intact larval tails revealed MyBP-H contributes to the compression of the myofilament lattice accompanying stretch or contraction, while in vitro motility experiments indicate MyBP-H shares MyBP-C's capacity as a molecular "brake". These results provide new insights and raise questions about the role of the C-zone during muscle development.
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Frisk C, Das S, Eriksson MJ, Walentinsson A, Corbascio M, Hage C, Kumar C, Ekström M, Maret E, Persson H, Linde C, Persson B. Cardiac biopsies reveal differences in transcriptomics between left and right ventricle in patients with or without diagnostic signs of heart failure. Sci Rep 2024; 14:5811. [PMID: 38461325 PMCID: PMC10924960 DOI: 10.1038/s41598-024-56025-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 02/29/2024] [Indexed: 03/11/2024] Open
Abstract
New or mild heart failure (HF) is mainly caused by left ventricular dysfunction. We hypothesised that gene expression differ between the left (LV) and right ventricle (RV) and secondly by type of LV dysfunction. We compared gene expression through myocardial biopsies from LV and RV of patients undergoing elective coronary bypass surgery (CABG). Patients were categorised based on LV ejection fraction (EF), diastolic function and NT-proBNP into pEF (preserved; LVEF ≥ 45%), rEF (reduced; LVEF < 45%) or normal LV function. Principal component analysis of gene expression displayed two clusters corresponding to LV and RV. Up-regulated genes in LV included natriuretic peptides NPPA and NPPB, transcription factors/coactivators STAT4 and VGLL2, ion channel related HCN2 and LRRC38 associated with cardiac muscle contraction, cytoskeleton, and cellular component movement. Patients with pEF phenotype versus normal differed in gene expression predominantly in LV, supporting that diastolic dysfunction and structural changes reflect early LV disease in pEF. DKK2 was overexpressed in LV of HFpEF phenotype, potentially leading to lower expression levels of β-catenin, α-SMA (smooth muscle actin), and enhanced apoptosis, and could be a possible factor in the development of HFpEF. CXCL14 was down-regulated in both pEF and rEF, and may play a role to promote development of HF.
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Affiliation(s)
- Christoffer Frisk
- Department of Cell and Molecular Biology, Science for Life Laboratory, Uppsala University, Box 596, 751 24, Uppsala, Sweden
| | - Sarbashis Das
- Department of Cell and Molecular Biology, Science for Life Laboratory, Uppsala University, Box 596, 751 24, Uppsala, Sweden
| | - Maria J Eriksson
- Department of Clinical Physiology, Karolinska University Hospital, 171 76, Stockholm, Sweden
- Department of Molecular Medicine and Surgery, Karolinska Institutet, 171 77, Stockholm, Sweden
| | - Anna Walentinsson
- Translational Science and Experimental Medicine, Research and Early Development, Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, 431 83, Gothenburg, Sweden
| | - Matthias Corbascio
- Department of Molecular Medicine and Surgery, Karolinska Institutet, 171 77, Stockholm, Sweden
- Department of Thoracic Surgery, Karolinska University Hospital, 171 76, Stockholm, Sweden
| | - Camilla Hage
- Department of Medicine, Karolinska Institutet, 171 77, Stockholm, Sweden
- Heart and Vascular Theme, Karolinska University Hospital, 171 76, Stockholm, Sweden
| | - Chanchal Kumar
- Translational Science and Experimental Medicine, Research and Early Development, Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, 431 83, Gothenburg, Sweden
- Department of Medicine, Integrated Cardio Metabolic Center (ICMC), Karolinska Institutet, 141 57, Huddinge, Sweden
| | - Mattias Ekström
- Department of Clinical Sciences, Karolinska Institutet, Danderyd Hospital, 182 88, Stockholm, Sweden
- Department of Cardiology, Danderyd Hospital, 182 88, Stockholm, Sweden
| | - Eva Maret
- Department of Clinical Physiology, Karolinska University Hospital, 171 76, Stockholm, Sweden
- Department of Molecular Medicine and Surgery, Karolinska Institutet, 171 77, Stockholm, Sweden
| | - Hans Persson
- Department of Clinical Sciences, Karolinska Institutet, Danderyd Hospital, 182 88, Stockholm, Sweden
- Department of Cardiology, Danderyd Hospital, 182 88, Stockholm, Sweden
| | - Cecilia Linde
- Department of Medicine, Karolinska Institutet, 171 77, Stockholm, Sweden
- Heart and Vascular Theme, Karolinska University Hospital, 171 76, Stockholm, Sweden
| | - Bengt Persson
- Department of Cell and Molecular Biology, Science for Life Laboratory, Uppsala University, Box 596, 751 24, Uppsala, Sweden.
- Department of Medical Biochemistry and Biophysics, Science for Life Laboratory, Karolinska Institutet, 171 77, Stockholm, Sweden.
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Burnham HV, Cizauskas HE, Barefield DY. Fine tuning contractility: atrial sarcomere function in health and disease. Am J Physiol Heart Circ Physiol 2024; 326:H568-H583. [PMID: 38156887 DOI: 10.1152/ajpheart.00252.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 12/20/2023] [Accepted: 12/21/2023] [Indexed: 01/03/2024]
Abstract
The molecular mechanisms of sarcomere proteins underlie the contractile function of the heart. Although our understanding of the sarcomere has grown tremendously, the focus has been on ventricular sarcomere isoforms due to the critical role of the ventricle in health and disease. However, atrial-specific or -enriched myofilament protein isoforms, as well as isoforms that become expressed in disease, provide insight into ways this complex molecular machine is fine-tuned. Here, we explore how atrial-enriched sarcomere protein composition modulates contractile function to fulfill the physiological requirements of atrial function. We review how atrial dysfunction negatively affects the ventricle and the many cardiovascular diseases that have atrial dysfunction as a comorbidity. We also cover the pathophysiology of mutations in atrial-enriched contractile proteins and how they can cause primary atrial myopathies. Finally, we explore what is known about contractile function in various forms of atrial fibrillation. The differences in atrial function in health and disease underscore the importance of better studying atrial contractility, especially as therapeutics currently in development to modulate cardiac contractility may have different effects on atrial sarcomere function.
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Affiliation(s)
- Hope V Burnham
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, Illinois, United States
| | - Hannah E Cizauskas
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, Illinois, United States
| | - David Y Barefield
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, Illinois, United States
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Chen Y, Peng R, Qian Y, Lu Y, Chen L, Yu M, Jiang M, Wu W, Lu S. Genome-wide analysis in PC6 electroacupuncture to ameliorate carfilzomib-induced cardiotoxicity in mice. Gene 2024; 897:148090. [PMID: 38110043 DOI: 10.1016/j.gene.2023.148090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 12/02/2023] [Accepted: 12/14/2023] [Indexed: 12/20/2023]
Abstract
Carfilzomib (CFZ), a proteasome inhibitor commonly used in the treatment of multiple myeloma (MM), exhibits limited clinical application due to its cardiotoxicity. In our study, electroacupuncture (EA) at Neiguan acupoint (PC6) effectively reversed CFZ-induced reduction in ejection fraction (EF) and fractional shortening (FS), demonstrating great potential effect for heart protection. Through comparative analysis of the transcriptome profile from heart samples of mice treated with DMSO control, CFZ injection, and EA stimulation, we identified a total of 770 differentially expressed genes (DEGs) in CFZ (vs. Control) group and 329 DEGs in EA (vs. CFZ) group. Specifically, CFZ (vs. Control) group exhibited 65 up-regulated DEGs and 705 down-regulated DEGs, while EA (vs. CFZ) group displayed 251 up-regulated DEGs and 78 down-regulated DEGs. Metascape analysis revealed that among these treatment groups, there were 137 co-expressed DEGs remarkably enriched in skeletal system development, cellular response to growth factor stimulus, negative regulation of Wnt signaling pathway, and muscle contraction. The expression patterns of miR-8114, Myl4, Col1a1, Tmem163, Myl7, Sln, and Fxyd3, which belong to the top 30 DEGs, were verified by quantitative real-time PCR (RT-qPCR). In summary, this study firstly discloses novel insights into the regulatory mechanisms underlying PC6-based EA therapy against CFZ-induced cardiotoxicity, potentially serving as a theoretical foundation for further clinical applications.
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Affiliation(s)
- Yuxuan Chen
- No.1 Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China.
| | - Rou Peng
- Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Yi Qian
- No.3 Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China.
| | - Yizhou Lu
- No.1 Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China.
| | - Liyao Chen
- Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Meiling Yu
- Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Minjiao Jiang
- Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Wei Wu
- Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Shengfeng Lu
- Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China.
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Barefield DY, Tonino P, Woulfe KC, Rahmanseresht S, O’Leary TS, Burnham HV, Wasserstrom JA, Kirk JA, Previs MJ, Granzier HL, McNally EM. Myosin-binding protein H-like regulates myosin-binding protein distribution and function in atrial cardiomyocytes. Proc Natl Acad Sci U S A 2023; 120:e2314920120. [PMID: 38091294 PMCID: PMC10741380 DOI: 10.1073/pnas.2314920120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 10/25/2023] [Indexed: 12/18/2023] Open
Abstract
Mutations in atrial-enriched genes can cause a primary atrial myopathy that can contribute to overall cardiovascular dysfunction. MYBPHL encodes myosin-binding protein H-like (MyBP-HL), an atrial sarcomere protein that shares domain homology with the carboxy-terminus of cardiac myosin-binding protein-C (cMyBP-C). The function of MyBP-HL and the relationship between MyBP-HL and cMyBP-C is unknown. To decipher the roles of MyBP-HL, we used structured illumination microscopy, immuno-electron microscopy, and mass spectrometry to establish the localization and stoichiometry of MyBP-HL. We found levels of cMyBP-C, a major regulator of myosin function, were half as abundant compared to levels in the ventricle. In genetic mouse models, loss of MyBP-HL doubled cMyBP-C abundance in the atria, and loss of cMyBP-C doubled MyBP-HL abundance in the atria. Structured illumination microscopy showed that both proteins colocalize in the C-zone of the A-band, with MyBP-HL enriched closer to the M-line. Immuno-electron microscopy of mouse atria showed MyBP-HL strongly localized 161 nm from the M-line, consistent with localization to the third 43 nm repeat of myosin heads. Both cMyBP-C and MyBP-HL had less-defined sarcomere localization in the atria compared to ventricle, yet areas with the expected 43 nm repeat distance were observed for both proteins. Isometric force measurements taken from control and Mybphl null single atrial myofibrils revealed that loss of Mybphl accelerated the linear phase of relaxation. These findings support a mechanism where MyBP-HL regulates cMyBP-C abundance to alter the kinetics of sarcomere relaxation in atrial sarcomeres.
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Affiliation(s)
- David Y. Barefield
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL60611
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, IL60153
| | - Paola Tonino
- Department of Cell and Molecular Medicine, University of Arizona, Tucson, AZ85724
| | - Kathleen C. Woulfe
- Division of Cardiology, Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO80045
| | - Sheema Rahmanseresht
- Department of Molecular Physiology and Biophysics, University of Vermont, Burlington, VT01655
| | - Thomas S. O’Leary
- Department of Molecular Physiology and Biophysics, University of Vermont, Burlington, VT01655
| | - Hope V. Burnham
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, IL60153
| | - J. Andrew Wasserstrom
- Department of Medicine and The Feinberg Cardiovascular and Renal Institute, Northwestern University Feinberg School of Medicine, Chicago, IL60611
| | - Jonathan A. Kirk
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, IL60153
| | - Michael J. Previs
- Department of Molecular Physiology and Biophysics, University of Vermont, Burlington, VT01655
| | - Henk L. Granzier
- Department of Cell and Molecular Medicine, University of Arizona, Tucson, AZ85724
| | - Elizabeth M. McNally
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL60611
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Shapiro D, Lee K, Asmussen J, Bourquard T, Lichtarge O. Evolutionary Action-Machine Learning Model Identifies Candidate Genes Associated With Early-Onset Coronary Artery Disease. J Am Heart Assoc 2023; 12:e029103. [PMID: 37642027 PMCID: PMC10547338 DOI: 10.1161/jaha.122.029103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 07/11/2023] [Indexed: 08/31/2023]
Abstract
Background Coronary artery disease is a primary cause of death around the world, with both genetic and environmental risk factors. Although genome-wide association studies have linked >100 unique loci to its genetic basis, these only explain a fraction of disease heritability. Methods and Results To find additional gene drivers of coronary artery disease, we applied machine learning to quantitative evolutionary information on the impact of coding variants in whole exomes from the Myocardial Infarction Genetics Consortium. Using ensemble-based supervised learning, the Evolutionary Action-Machine Learning framework ranked each gene's ability to classify case and control samples and identified 79 significant associations. These were connected to known risk loci; enriched in cardiovascular processes like lipid metabolism, blood clotting, and inflammation; and enriched for cardiovascular phenotypes in knockout mouse models. Among them, INPP5F and MST1R are examples of potentially novel coronary artery disease risk genes that modulate immune signaling in response to cardiac stress. Conclusions We concluded that machine learning on the functional impact of coding variants, based on a massive amount of evolutionary information, has the power to suggest novel coronary artery disease risk genes for mechanistic and therapeutic discoveries in cardiovascular biology, and should also apply in other complex polygenic diseases.
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Affiliation(s)
- Dillon Shapiro
- Department of Molecular and Human GeneticsBaylor College of MedicineHoustonTXUSA
| | - Kwanghyuk Lee
- Department of Molecular and Human GeneticsBaylor College of MedicineHoustonTXUSA
| | - Jennifer Asmussen
- Department of Molecular and Human GeneticsBaylor College of MedicineHoustonTXUSA
| | - Thomas Bourquard
- Department of Molecular and Human GeneticsBaylor College of MedicineHoustonTXUSA
| | - Olivier Lichtarge
- Department of Molecular and Human GeneticsBaylor College of MedicineHoustonTXUSA
- Computational & Integrative Biomedical Research CenterBaylor College of MedicineHoustonTXUSA
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7
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Gkrouzoudi A, Tsingotjidou A, Jirkof P. A systematic review on reporting of refinement measures in mouse ECG telemetry implantation surgery. Lab Anim 2023; 57:9-25. [PMID: 36117425 DOI: 10.1177/00236772221115492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Telemetric monitoring is used in many scientific fields, such as cardiovascular research, neurology, endocrinology, as well as animal welfare research. Nowadays, implanted electrocardiogram (ECG) radiotelemetry units are the gold standard for monitoring ECG traces, heart rate and heart rate variability in freely moving mice. Telemetry technology can be a valuable tool when studies utilize it adequately, while prioritizing animal welfare. Recently, concerns have been raised in many research fields, including animal research, regarding the reproducibility of research findings, with insufficient reporting being one of the underlying causes.A systematic review was performed by making use of three literature databases, in order to include all publications until 31.12.2019, where the surgical placing of ECG recording telemetry devices in adult mice was involved. Data extracted from the publications included selected items recommended by the ARRIVE guidelines. We focused on aspects related to the refinement of the surgery and experimental conditions that aim to improve animal welfare. In general, the quality of reporting was low in the analyzed 234 publications. Based on our analyses, we assume there has been no improvement in this field's reporting quality since 2010 when the ARRIVE guidelines on reporting were introduced. Additionally, even though expert recommendations on telemetry surgery refinement have been available since many years now, no increase in uptake (or reporting) of these measures prior (e.g., acclimatization), during (e.g., asepsis) or after (e.g., social housing) the surgery could be observed.
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Affiliation(s)
- Alexandra Gkrouzoudi
- Laboratory of Anatomy, Histology and Embryology, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - Anastasia Tsingotjidou
- Laboratory of Anatomy, Histology and Embryology, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - Paulin Jirkof
- Division for Surgical Research, University Hospital Zurich, University of Zurich, Switzerland.,Office for Animal Welfare and 3Rs, University of Zurich, Switzerland
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8
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Zhu XN, Wang YZ, Li C, Wu HY, Zhang R, Hu XX, Zhang R, Hu XX. Chicken chromatin accessibility atlas accelerates epigenetic annotation of birds and gene fine-mapping associated with growth traits. Zool Res 2023; 44:53-62. [PMID: 36317479 PMCID: PMC9841184 DOI: 10.24272/j.issn.2095-8137.2022.228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The development of epigenetic maps, such as the ENCODE project in humans, provides resources for gene regulation studies and a reference for research of disease-related regulatory elements. However, epigenetic information, such as a bird-specific chromatin accessibility atlas, is currently lacking for the thousands of bird species currently described. The major genomic difference between birds and mammals is their shorter introns and intergenic distances, which seriously hinders the use of humans and mice as a reference for studying the function of important regulatory regions in birds. In this study, using chicken as a model bird species, we systematically compiled a chicken chromatin accessibility atlas using 53 Assay of Transposase Accessible Chromatin sequencing (ATAC-seq) samples across 11 tissues. An average of 50 796 open chromatin regions were identified per sample, cumulatively accounting for 20.36% of the chicken genome. Tissue specificity was largely reflected by differences in intergenic and intronic peaks, with specific functional regulation achieved by two mechanisms: recruitment of several sequence-specific transcription factors and direct regulation of adjacent functional genes. By integrating data from genome-wide association studies, our results suggest that chicken body weight is driven by different regulatory variants active in growth-relevant tissues. We propose CAB39L (active in the duodenum), RCBTB1 (muscle and liver), and novel long non-coding RNA ENSGALG00000053256 (bone) as candidate genes regulating chicken body weight. Overall, this study demonstrates the value of epigenetic data in fine-mapping functional variants and provides a compendium of resources for further research on the epigenetics and evolution of birds and mammals.
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Affiliation(s)
- Xiao-Ning Zhu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Yu-Zhe Wang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China,National Research Facility for Phenotypic and Genotypic Analysis of Model Animals (Beijing), China Agricultural University, Beijing 100193, China,E-mail:
| | - Chong Li
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Han-Yu Wu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China,National Research Facility for Phenotypic and Genotypic Analysis of Model Animals (Beijing), China Agricultural University, Beijing 100193, China
| | - Ran Zhang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Xiao-Xiang Hu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China,National Research Facility for Phenotypic and Genotypic Analysis of Model Animals (Beijing), China Agricultural University, Beijing 100193, China,
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9
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Spracklen TF, Keavney B, Laing N, Ntusi N, Shaboodien G. Modern genomic techniques in the identification of genetic causes of cardiomyopathy. Heart 2022; 108:1843-1850. [PMID: 35140110 DOI: 10.1136/heartjnl-2021-320424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 01/18/2022] [Indexed: 11/04/2022] Open
Abstract
Over the past three decades numerous disease-causing genes have been linked to the pathogenesis of heritable cardiomyopathies, but many causal genes are yet to be identified. Next-generation sequencing (NGS) platforms have revolutionised clinical testing capacity in familial cardiomyopathy. In this review, we summarise how NGS technologies have advanced our understanding of genetic non-syndromic cardiomyopathy over the last decade. First, 26 putative new disease-causing genes have been identified to date, mostly from whole-exome sequencing, and some of which (FLNC, MTO1, HCN4) have had a considerable clinical impact and are now included in routine diagnostic gene panels. Second, we consider challenges in variant interpretation and the importance of large-scale NGS population control cohorts for this purpose. Third, an emerging role of common variation in some forms of genetic cardiomyopathy is being elucidated through recent studies which have illustrated an additive effect of numerous polymorphic loci on cardiac parameters; this may explain phenotypic variability and low rates of genetic diagnosis from sequencing studies. Finally, we discuss the clinical utility of genetic testing in cardiomyopathy in Western settings, where NGS panel testing of core disease genes is currently recommended with possible implications for patient management. Given the findings of recent studies, whole-exome or whole-genome sequencing should be considered in patients of non-European ancestry with clearly familial disease, or severe paediatric disease, when no result is obtained on panel sequencing. The clinical utility of polygenic risk assessment needs to be investigated further in patients with unexplained dilated cardiomyopathy and hypertrophic cardiomyopathy in whom a pathogenic variant is not identified.
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Affiliation(s)
- Timothy F Spracklen
- Cape Heart Institute, University of Cape Town Department of Medicine, Cape Town, South Africa
- Department of Paediatrics and Child Health, University of Cape Town, Cape Town, South Africa
| | - Bernard Keavney
- Division of Cardiovascular Sciences, The University of Manchester, Manchester, UK
| | - Nakita Laing
- Division of Human Genetics, University of Cape Town, Cape Town, South Africa
| | - Ntobeko Ntusi
- Cape Heart Institute, University of Cape Town Department of Medicine, Cape Town, South Africa
- Department of Medicine, University of Cape Town, Cape Universities Body Imaging Centre, Cape Town, South Africa
| | - Gasnat Shaboodien
- Cape Heart Institute, University of Cape Town Department of Medicine, Cape Town, South Africa
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10
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Barefield DY, Yamakawa S, Tahtah I, Sell JJ, Broman M, Laforest B, Harris S, Alvarez AA, Araujo KN, Puckelwartz MJ, Wasserstrom JA, Fishman GI, McNally EM. Partial and complete loss of myosin binding protein H-like cause cardiac conduction defects. J Mol Cell Cardiol 2022; 169:28-40. [PMID: 35533732 PMCID: PMC9329245 DOI: 10.1016/j.yjmcc.2022.04.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 03/25/2022] [Accepted: 04/15/2022] [Indexed: 02/04/2023]
Abstract
A premature truncation of MYBPHL in humans and a loss of Mybphl in mice is associated with dilated cardiomyopathy, atrial and ventricular arrhythmias, and atrial enlargement. MYBPHL encodes myosin binding protein H-like (MyBP-HL). Prior work in mice indirectly identified Mybphl expression in the atria and in small puncta throughout the ventricle. Because of its genetic association with human and mouse cardiac conduction system disease, we evaluated the anatomical localization of MyBP-HL and the consequences of loss of MyBP-HL on conduction system function. Immunofluorescence microscopy of normal adult mouse ventricles identified MyBP-HL-positive ventricular cardiomyocytes that co-localized with the ventricular conduction system marker contactin-2 near the atrioventricular node and in a subset of Purkinje fibers. Mybphl heterozygous ventricles had a marked reduction of MyBP-HL-positive cells compared to controls. Lightsheet microscopy of normal perinatal day 5 mouse hearts showed enrichment of MyBP-HL-positive cells within and immediately adjacent to the contactin-2-positive ventricular conduction system, but this association was not apparent in Mybphl heterozygous hearts. Surface telemetry of Mybphl-null mice revealed atrioventricular block and atrial bigeminy, while intracardiac pacing revealed a shorter atrial relative refractory period and atrial tachycardia. Calcium transient analysis of isolated Mybphl-null atrial cardiomyocytes demonstrated an increased heterogeneity of calcium release and faster rates of calcium release compared to wild type controls. Super-resolution microscopy of Mybphl heterozygous and homozygous null atrial cardiomyocytes showed ryanodine receptor disorganization compared to wild type controls. Abnormal calcium release, shorter atrial refractory period, and atrial dilation seen in Mybphl null, but not wild type control hearts, agree with the observed atrial arrhythmias, bigeminy, and atrial tachycardia, whereas the proximity of MyBP-HL-positive cells with the ventricular conduction system provides insight into how a predominantly atrial expressed gene contributes to ventricular arrhythmias and ventricular dysfunction.
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Affiliation(s)
- David Y. Barefield
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL;,Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, IL;,Correspondence to: David Y. Barefield, PhD, Department of Cell and Molecular Physiology Loyola University Chicago, 2160 S. 1st Ave. Maywood, IL 60153,
| | - Sean Yamakawa
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Ibrahim Tahtah
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Jordan J. Sell
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Michael Broman
- Section of Cardiology, Department of Medicine, University of Chicago, Chicago, IL
| | - Brigitte Laforest
- Section of Cardiology, Department of Medicine, University of Chicago, Chicago, IL
| | - Sloane Harris
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Alejandro A. Alvarez
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, IL
| | - Kelly N. Araujo
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, IL
| | - Megan J. Puckelwartz
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - J. Andrew Wasserstrom
- Department of Medicine and The Feinberg Cardiovascular and Renal Institute, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Glenn I. Fishman
- Division of Cardiology, NYU Grossman School of Medicine, New York, New York
| | - Elizabeth M. McNally
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL;,Correspondence to: Elizabeth McNally, MD, PhD, Center for Genetic Medicine, Northwestern University, 303 E. Superior St. Chicago, IL 60611,
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11
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Okada D, Okamoto Y, Io T, Oka M, Kobayashi D, Ito S, Yamada R, Ishii K, Ono K. Comparative Study of Transcriptome in the Hearts Isolated from Mice, Rats, and Humans. Biomolecules 2022; 12:biom12060859. [PMID: 35740984 PMCID: PMC9221511 DOI: 10.3390/biom12060859] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/16/2022] [Accepted: 06/17/2022] [Indexed: 01/27/2023] Open
Abstract
The heart is a significant organ in mammalian life, and the heartbeat mechanism has been an essential focus of science. However, few studies have focused on species differences. Accordingly, challenges remain in studying genes that have universal functions across species and genes that determine species differences. Here, we analyzed transcriptome data in mouse, rat, and human atria, ventricles, and sinoatrial nodes (SA) obtained from different platforms and compared them by calculating specificity measure (SPM) values in consideration of species differences. Among the three heart regions, the species differences in SA were the greatest, and we searched for genes that determined the essential characteristics of SA, which was SHOX2 in our criteria. The SPM value of SHOX2 was prominently high across species. Similarly, by calculating SPM values, we identified 3 atrial-specific, 11 ventricular-specific, and 17 SA-specific markers. Ontology analysis identified 70 cardiac region- and species-specific ontologies. These results suggest that reanalyzing existing data by calculating SPM values may identify novel tissue-specific genes and species-dependent gene expression. This study identified the importance of SHOX2 as an SA-specific transcription factor, a novel cardiac regional marker, and species-dependent ontologies.
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Affiliation(s)
- Daigo Okada
- Center for Genomic Medicine, Graduate School of Medicine, Kyoto University, Shogoinkawahara-cho, Kyoto 606-8507, Japan; (D.O.); (R.Y.)
| | - Yosuke Okamoto
- Department of Cell Physiology, Akita Graduate School of Medicine, Hondo, Akita 010-8543, Japan; (D.K.); (S.I.); (K.O.)
- Correspondence:
| | - Toshiro Io
- Research Department, Ono Pharmaceutical Co., Ltd., Kyutaromachi, Osaka 618-8585, Japan; (T.I.); (M.O.)
| | - Miho Oka
- Research Department, Ono Pharmaceutical Co., Ltd., Kyutaromachi, Osaka 618-8585, Japan; (T.I.); (M.O.)
| | - Daiki Kobayashi
- Department of Cell Physiology, Akita Graduate School of Medicine, Hondo, Akita 010-8543, Japan; (D.K.); (S.I.); (K.O.)
| | - Suzuka Ito
- Department of Cell Physiology, Akita Graduate School of Medicine, Hondo, Akita 010-8543, Japan; (D.K.); (S.I.); (K.O.)
| | - Ryo Yamada
- Center for Genomic Medicine, Graduate School of Medicine, Kyoto University, Shogoinkawahara-cho, Kyoto 606-8507, Japan; (D.O.); (R.Y.)
| | - Kuniaki Ishii
- Department of Pharmacology, Faculty of medicine, Yamagata University, Iida-Nishi, Yamagata 990-9585, Japan;
| | - Kyoichi Ono
- Department of Cell Physiology, Akita Graduate School of Medicine, Hondo, Akita 010-8543, Japan; (D.K.); (S.I.); (K.O.)
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12
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Leng L, Ma J, Zhang PP, Xu SC, Li X, Jin Y, Cai J, Tang R, Zhao L, He ZC, Li MS, Zhang H, Zhou LR, Wu ZH, Li TR, Zhu YP, Wang YJ, Wu HB, Ping YF, Yao XH, Zhu CH, Guo HT, Tan LY, Liang ZY, Bian XW, Zhang SY. Spatial region-resolved proteome map reveals mechanism of COVID-19-associated heart injury. Cell Rep 2022; 39:110955. [PMID: 35679865 PMCID: PMC9135696 DOI: 10.1016/j.celrep.2022.110955] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 04/28/2022] [Accepted: 05/23/2022] [Indexed: 11/28/2022] Open
Abstract
Direct myocardial and vascular injuries due to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection-driven inflammation is the leading cause of acute cardiac injury associated with coronavirus disease 2019 (COVID-19). However, in-depth knowledge of the injury characteristics of the heart affected by inflammation is lacking. In this study, using a quantitative spatial proteomics strategy that combines comparative anatomy, laser-capture microdissection, and histological examination, we establish a region-resolved proteome map of the myocardia and microvessels with obvious inflammatory cells from hearts of patients with COVID-19. A series of molecular dysfunctions of myocardia and microvessels is observed in different cardiac regions. The myocardia and microvessels of the left atrial are the most susceptible to virus infection and inflammatory storm, suggesting more attention should be paid to the lesion and treatment of these two parts. These results can guide in improving clinical treatments for cardiovascular diseases associated with COVID-19.
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Affiliation(s)
- Ling Leng
- Stem Cell and Regenerative Medicine Lab, Department of Medical Science Research Center, State Key Laboratory of Complex Severe and Rare Diseases, Translational Medicine Center, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China.
| | - Jie Ma
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China
| | - Pei-Pei Zhang
- Department of Pathology, The First Hospital Affiliated to University of Science and Technology of China (USTC), Intelligent Pathology Institute, Division of Life Sciences and Medicine, USTC, Hefei, Anhui 230036, China; Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing 400038, China; Department of Pathology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Si-Chi Xu
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Xiao Li
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China
| | - Ye Jin
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Jun Cai
- Department of Pathology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Rui Tang
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing 400038, China
| | - Lei Zhao
- Department of Pathology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Zhi-Cheng He
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing 400038, China
| | - Man-Sheng Li
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China
| | - Hui Zhang
- Department of Pathology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Liang-Rui Zhou
- Department of Pathology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Zhi-Hong Wu
- Stem Cell and Regenerative Medicine Lab, Department of Medical Science Research Center, State Key Laboratory of Complex Severe and Rare Diseases, Translational Medicine Center, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Tian-Ran Li
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing 400038, China
| | - Yun-Ping Zhu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China; Basic Medical School, Anhui Medical University, Anhui 230032, China
| | - Yu-Jie Wang
- Stem Cell and Regenerative Medicine Lab, Department of Medical Science Research Center, State Key Laboratory of Complex Severe and Rare Diseases, Translational Medicine Center, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Hai-Bo Wu
- Department of Pathology, The First Hospital Affiliated to University of Science and Technology of China (USTC), Intelligent Pathology Institute, Division of Life Sciences and Medicine, USTC, Hefei, Anhui 230036, China
| | - Yi-Fang Ping
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing 400038, China
| | - Xiao-Hong Yao
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing 400038, China
| | - Chu-Hong Zhu
- Department of Pathology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Hai-Tao Guo
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing 400038, China
| | - Le-Yong Tan
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing 400038, China
| | - Zhi-Yong Liang
- Department of Pathology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China.
| | - Xiu-Wu Bian
- Department of Pathology, The First Hospital Affiliated to University of Science and Technology of China (USTC), Intelligent Pathology Institute, Division of Life Sciences and Medicine, USTC, Hefei, Anhui 230036, China; Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Key Laboratory of Tumor Immunopathology, Ministry of Education of China, Chongqing 400038, China.
| | - Shu-Yang Zhang
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China; Tsinghua-Peking Center for Life Sciences, Tsinghua University, Beijing 100084, China.
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13
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Abstract
Inherited cardiomyopathies are a major cause of mortality and morbidity worldwide and can be caused by mutations in a wide range of proteins located in different cellular compartments. The present review is based on Dr. Ju Chen's 2021 Robert M. Berne Distinguished Lectureship of the American Physiological Society Cardiovascular Section, in which he provided an overview of the current knowledge on the cardiomyopathy-associated proteins that have been studied in his laboratory. The review provides a general summary of the proteins in different compartments of cardiomyocytes associated with cardiomyopathies, with specific focus on the proteins that have been studied in Dr. Chen's laboratory.
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Affiliation(s)
- Marie-Louise Bang
- 1Institute of Genetic and Biomedical Research (IRGB), National Research Council (CNR), Milan Unit, Milan, Italy,2IRCCS Humanitas Research Hospital, Rozzano (Milan), Italy
| | - Julius Bogomolovas
- 3Division of Cardiovascular Medicine, Department of Medicine Cardiology, University of California, San Diego, La Jolla, California
| | - Ju Chen
- 3Division of Cardiovascular Medicine, Department of Medicine Cardiology, University of California, San Diego, La Jolla, California
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14
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Gandhi S, Witten A, De Majo F, Gilbers M, Maessen J, Schotten U, de Windt LJ, Stoll M. Evolutionarily conserved transcriptional landscape of the heart defining the chamber specific physiology. Genomics 2021; 113:3782-3792. [PMID: 34506887 DOI: 10.1016/j.ygeno.2021.09.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 08/17/2021] [Accepted: 09/05/2021] [Indexed: 12/14/2022]
Abstract
Cardiovascular disease (CVD) remains the leading cause of death worldwide. A deeper characterization of regional transcription patterns within different heart chambers may aid to improve our understanding of the molecular mechanisms involved in myocardial function and further, our ability to develop novel therapeutic strategies. Here, we used RNA sequencing to determine differentially expressed protein coding (PC) and long non-coding (lncRNA) transcripts within the heart chambers across seven vertebrate species and identified evolutionarily conserved chamber specific genes, lncRNAs and pathways. We investigated lncRNA homologs based on sequence, secondary structure, synteny and expressional conservation and found most lncRNAs to be conserved by synteny. Regional co-expression patterns of transcripts are modulated by multiple factors, including genomic overlap, strandedness and transcript biotype. Finally, we provide a community resource designated EvoACTG, which informs researchers on the conserved yet intertwined nature of the coding and non-coding cardiac transcriptome across popular model organisms in CVD research.
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Affiliation(s)
- Shrey Gandhi
- Institute of Human Genetics, Division of Genetic Epidemiology, University of Muenster, Muenster, Germany
| | - Anika Witten
- Institute of Human Genetics, Division of Genetic Epidemiology, University of Muenster, Muenster, Germany
| | - Federica De Majo
- Department of Molecular Genetics, Maastricht University, Maastricht, the Netherlands
| | - Martijn Gilbers
- Department of Cardiothoracic Surgery, CARIM School for Cardiovascular Diseases, Maastricht University Medical Centre+, Maastricht, the Netherlands
| | - Jos Maessen
- Department of Cardiothoracic Surgery, CARIM School for Cardiovascular Diseases, Maastricht University Medical Centre+, Maastricht, the Netherlands
| | - Ulrich Schotten
- Department of Physiology, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | - Leon J de Windt
- Department of Molecular Genetics, Maastricht University, Maastricht, the Netherlands
| | - Monika Stoll
- Institute of Human Genetics, Division of Genetic Epidemiology, University of Muenster, Muenster, Germany; Department of Biochemistry, Genetic Epidemiology and Statistical Genetics, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands.
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15
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Guo S, Okyere AD, McEachern E, Strong JL, Carter RL, Patwa VC, Thomas TP, Landy M, Song J, Lucchese AM, Martin TG, Gao E, Rajan S, Kirk JA, Koch WJ, Cheung JY, Tilley DG. Epidermal growth factor receptor-dependent maintenance of cardiac contractility. Cardiovasc Res 2021; 118:1276-1288. [PMID: 33892492 DOI: 10.1093/cvr/cvab149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 02/16/2021] [Accepted: 04/21/2021] [Indexed: 01/22/2023] Open
Abstract
AIMS Epidermal growth factor receptor (EGFR) is essential to the development of multiple tissues and organs and is a target of cancer therapeutics. Due to the embryonic lethality of global EGFR deletion and conflicting reports of cardiac-overexpressed EGFR mutants, its specific impact on the adult heart, normally or in response to chronic stress, has not been established. Using complimentary genetic strategies to modulate cardiomyocyte-specific EGFR expression, we aim to define its role in the regulation of cardiac function and remodeling. METHODS AND RESULTS A floxed EGFR mouse model with α-myosin heavy chain-Cre-mediated cardiomyocyte-specific EGFR downregulation (CM-EGFR-KD mice) developed contractile dysfunction by 9 weeks of age, marked by impaired diastolic relaxation, as monitored via echocardiographic, hemodynamic and isolated cardiomyocyte contractility analyses. This contractile defect was maintained over time without overt cardiac remodeling until 10 months of age, after which the mice ultimately developed severe heart failure and reduced lifespan. Acute downregulation of EGFR in adult floxed EGFR mice with adeno-associated virus 9 (AAV9)-encoded Cre with a cardiac troponin T promoter (AAV9-cTnT-Cre) recapitulated the CM-EGFR-KD phenotype, while AAV9-cTnT-EGFR treatment of adult CM-EGFR-KD mice rescued the phenotype. Notably, chronic administration of the β-adrenergic receptor (βAR) agonist isoproterenol effectively and reversibly compensated for the contractile dysfunction in the absence of cardiomyocyte hypertrophy in CM-EGFR-KD mice. Mechanistically, EGFR downregulation reduced the expression of protein phosphatase 2 A (PP2A) regulatory subunit Ppp2r3a/PR72, which was associated with decreased phosphorylation of phospholamban (PLB) and Ca2+ clearance, and whose re-expression via AAV9-cTnT-PR72 rescued the CM-EGFR-KD phenotype. CONCLUSIONS Altogether our study highlights a previously unrecognized role for EGFR in maintaining contractile homeostasis under physiologic conditions in the adult heart via regulation of PR72 expression. TRANSLATIONAL PERSPECTIVE Our study highlights a previously unrecognized role for EGFR in maintaining contractile homeostasis under physiologic conditions in the adult heart via regulation of PR72, a PP2A regulatory subunit with an unknown impact on cardiac function. Further, we have shown that cardiomyocyte-expressed EGFR is required for the promotion of cardiac hypertrophy under conditions of chronic catecholamine stress. Altogether, our study provides new insight into the dynamic nature of cardiomyocyte-specific EGFR.
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Affiliation(s)
- Shuchi Guo
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA
| | - Ama Dedo Okyere
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA
| | - Erin McEachern
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA
| | - Joshua L Strong
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA
| | - Rhonda L Carter
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA
| | - Viren C Patwa
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA
| | - Toby P Thomas
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA
| | - Melissa Landy
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA
| | - Jianliang Song
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA
| | - Ana Maria Lucchese
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA
| | - Thomas G Martin
- Loyola University Chicago, Department of Cell and Molecular Physiology, Chicago, Illinois, USA
| | - Erhe Gao
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA
| | - Sudarsan Rajan
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA
| | - Jonathan A Kirk
- Loyola University Chicago, Department of Cell and Molecular Physiology, Chicago, Illinois, USA
| | - Walter J Koch
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA
| | - Joseph Y Cheung
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA
| | - Douglas G Tilley
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA
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16
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A proof-of-concept study for the pathogenetic role of enhancer hypomethylation of MYBPHL in multiple myeloma. Sci Rep 2021; 11:7009. [PMID: 33772052 PMCID: PMC7997988 DOI: 10.1038/s41598-021-86473-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 03/01/2021] [Indexed: 12/25/2022] Open
Abstract
Enhancer DNA methylation and expression of MYBPHL was studied in multiple myeloma (MM). By bisulfite genomic sequencing, among the three CpGs inside the MYBPHL enhancer, CpG1 was significantly hypomethylated in MM cell lines (6.7–50.0%) than normal plasma cells (37.5–75.0%) (P = 0.007), which was negatively correlated with qPCR-measured MYBPHL expression. In RPMI-8226 and WL-2 cells, bearing the highest CpG1 methylation, 5-azadC caused enhancer demethylation and expression of MYBPHL. In primary samples, higher CpG1 methylation was associated with lower MYBPHL expression. By luciferase assay, luciferase activity was enhanced by MYBPHL enhancer compared with empty vector control, but reduced by site-directed mutagenesis of each CpG. RNA-seq data of newly diagnosed MM patients showed that MYBPHL expression was associated with t(11;14). MOLP-8 cells carrying t(11;14) express the highest levels of MYBPHL, and its knockdown reduced cellular proliferation and increased cell death. Herein, as a proof-of-concept, our data demonstrated that the MYBPHL enhancer, particularly CpG1, was hypomethylated and associated with increased MYBPHL expression in MM, which was implicated in myelomagenesis.
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17
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Tijsen AJ, Cócera Ortega L, Reckman YJ, Zhang X, van der Made I, Aufiero S, Li J, Kamps SC, van den Bout A, Devalla HD, van Spaendonck-Zwarts KY, Engelhardt S, Gepstein L, Ware JS, Pinto YM. Titin Circular RNAs Create a Back-Splice Motif Essential for SRSF10 Splicing. Circulation 2021; 143:1502-1512. [PMID: 33583186 PMCID: PMC8032209 DOI: 10.1161/circulationaha.120.050455] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Supplemental Digital Content is available in the text. Background: TTN (Titin), the largest protein in humans, forms the molecular spring that spans half of the sarcomere to provide passive elasticity to the cardiomyocyte. Mutations that disrupt the TTN transcript are the most frequent cause of hereditary heart failure. We showed before that TTN produces a class of circular RNAs (circRNAs) that depend on RBM20 to be formed. In this study, we show that the back-splice junction formed by this class of circRNAs creates a unique motif that binds SRSF10 to enable it to regulate splicing. Furthermore, we show that one of these circRNAs (cTTN1) distorts both localization of and splicing by RBM20. Methods: We calculated genetic constraint of the identified motif in 125 748 exomes collected from the gnomAD database. Furthermore, we focused on the highest expressed RBM20-dependent circRNA in the human heart, which we named cTTN1. We used shRNAs directed to the back-splice junction to induce selective loss of cTTN1 in human induced pluripotent stem cell–derived cardiomyocytes. Results: Human genetics suggests reduced genetic tolerance of the generated motif, indicating that mutations in this motif might lead to disease. RNA immunoprecipitation confirmed binding of circRNAs with this motif to SRSF10. Selective loss of cTTN1 in human induced pluripotent stem cell–derived cardiomyocytes induced structural abnormalities, apoptosis, and reduced contractile force in engineered heart tissue. In line with its SRSF10 binding, loss of cTTN1 caused abnormal splicing of important cardiomyocyte SRSF10 targets such as MEF2A and CASQ2. Strikingly, loss of cTTN1 also caused abnormal splicing of TTN itself. Mechanistically, we show that loss of cTTN1 distorts both localization of and splicing by RBM20. Conclusions: We demonstrate that circRNAs formed from the TTN transcript are essential for normal splicing of key muscle genes by enabling splice regulators RBM20 and SRSF10. This shows that the TTN transcript also has regulatory roles, besides its well-known signaling and structural function. In addition, we demonstrate that the specific sequence created by the back-splice junction of these circRNAs has important functions. This highlights the existence of functionally important sequences that cannot be recognized as such in the human genome but provides an as-yet unrecognized source for functional sequence variation.
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Affiliation(s)
- Anke J Tijsen
- Amsterdam UMC, University of Amsterdam, Departments of Experimental Cardiology, Amsterdam Cardiovascular Sciences (A.J.T., L.C.O., Y.J.R., I.v.d.M., S.A., S.C.K., A.v.d.B., Y.M.P.), Amsterdam, The Netherlands
| | - Lucía Cócera Ortega
- Amsterdam UMC, University of Amsterdam, Departments of Experimental Cardiology, Amsterdam Cardiovascular Sciences (A.J.T., L.C.O., Y.J.R., I.v.d.M., S.A., S.C.K., A.v.d.B., Y.M.P.), Amsterdam, The Netherlands
| | - Yolan J Reckman
- Amsterdam UMC, University of Amsterdam, Departments of Experimental Cardiology, Amsterdam Cardiovascular Sciences (A.J.T., L.C.O., Y.J.R., I.v.d.M., S.A., S.C.K., A.v.d.B., Y.M.P.), Amsterdam, The Netherlands
| | - Xiaolei Zhang
- Imperial College London, South Kensington Campus, London, UK (X.Z., J.S.W.)
| | - Ingeborg van der Made
- Amsterdam UMC, University of Amsterdam, Departments of Experimental Cardiology, Amsterdam Cardiovascular Sciences (A.J.T., L.C.O., Y.J.R., I.v.d.M., S.A., S.C.K., A.v.d.B., Y.M.P.), Amsterdam, The Netherlands
| | - Simona Aufiero
- Amsterdam UMC, University of Amsterdam, Departments of Experimental Cardiology, Amsterdam Cardiovascular Sciences (A.J.T., L.C.O., Y.J.R., I.v.d.M., S.A., S.C.K., A.v.d.B., Y.M.P.), Amsterdam, The Netherlands
| | - Jiuru Li
- Medical Biology, Amsterdam Cardiovascular Sciences (J.L., H.D.D.), Amsterdam, The Netherlands
| | - Selina C Kamps
- Amsterdam UMC, University of Amsterdam, Departments of Experimental Cardiology, Amsterdam Cardiovascular Sciences (A.J.T., L.C.O., Y.J.R., I.v.d.M., S.A., S.C.K., A.v.d.B., Y.M.P.), Amsterdam, The Netherlands
| | - Anouk van den Bout
- Amsterdam UMC, University of Amsterdam, Departments of Experimental Cardiology, Amsterdam Cardiovascular Sciences (A.J.T., L.C.O., Y.J.R., I.v.d.M., S.A., S.C.K., A.v.d.B., Y.M.P.), Amsterdam, The Netherlands
| | - Harsha D Devalla
- Medical Biology, Amsterdam Cardiovascular Sciences (J.L., H.D.D.), Amsterdam, The Netherlands
| | | | - Stefan Engelhardt
- DZHK (German Center for Cardiovascular Research), partner site Munich Heart Alliance, Munich, Germany (S.E.).,Institut für Pharmakologie und Toxikologie, Technische Universität München, Munich, Germany (S.E.)
| | - Lior Gepstein
- The Sohnis Family Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Rappaport Faculty of Medicine and Research Institute, Technion-Institute of Technology, Haifa, Israel (L.G.)
| | - James S Ware
- Imperial College London, South Kensington Campus, London, UK (X.Z., J.S.W.)
| | - Yigal M Pinto
- Amsterdam UMC, University of Amsterdam, Departments of Experimental Cardiology, Amsterdam Cardiovascular Sciences (A.J.T., L.C.O., Y.J.R., I.v.d.M., S.A., S.C.K., A.v.d.B., Y.M.P.), Amsterdam, The Netherlands
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18
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Timmermans S, Libert C. Ratpost: a searchable database of protein-inactivating sequence variations in 40 sequenced rat-inbred strains. Mamm Genome 2021; 32:1-11. [PMID: 33481094 DOI: 10.1007/s00335-020-09853-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 11/18/2020] [Indexed: 10/22/2022]
Abstract
Rat-inbred strains are essential as scientific tools. We have analyzed the publicly available genome sequences of 40 rat-inbred strains and provide an overview of sequence variations leading to amino acid changes in protein-coding genes, premature STOP codons or loss of STOP codons, and short in-frame insertions and deletions of all protein-coding genes across all these inbred lines. We provide an overview of the predicted impact on protein function of all these affected proteins in the database, by comparing their sequence with the sequences of the rat reference strain BN/SsNHsdMcwi. We also investigate the flaws of the protein-coding sequences of this reference strain itself, by comparing them with a consensus genome. These data can be retrieved via a searchable website (Ratpost.be) and allow a global, better interpretation of genetic background effects and a source of naturally defective alleles in these 40 sequenced classical and high-priority rat-inbred strains.
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Affiliation(s)
- Steven Timmermans
- VIB-UGent Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Claude Libert
- VIB-UGent Center for Inflammation Research, Ghent, Belgium. .,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.
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19
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Linscheid N, Poulsen PC, Pedersen ID, Gregers E, Svendsen JH, Olesen MS, Olsen JV, Delmar M, Lundby A. Quantitative Proteomics of Human Heart Samples Collected In Vivo Reveal the Remodeled Protein Landscape of Dilated Left Atrium Without Atrial Fibrillation. Mol Cell Proteomics 2020; 19:1132-1144. [PMID: 32291283 PMCID: PMC7338087 DOI: 10.1074/mcp.ra119.001878] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 03/13/2020] [Indexed: 12/11/2022] Open
Abstract
Genetic and genomic research has greatly advanced our understanding of heart disease. Yet, comprehensive, in-depth, quantitative maps of protein expression in hearts of living humans are still lacking. Using samples obtained during valve replacement surgery in patients with mitral valve prolapse (MVP), we set out to define inter-chamber differences, the intersect of proteomic data with genetic or genomic datasets, and the impact of left atrial dilation on the proteome of patients with no history of atrial fibrillation (AF).We collected biopsies from right atria (RA), left atria (LA) and left ventricle (LV) of seven male patients with mitral valve regurgitation with dilated LA but no history of AF. Biopsy samples were analyzed by high-resolution mass spectrometry (MS), where peptides were pre-fractionated by reverse phase high-pressure liquid chromatography prior to MS measurement on a Q-Exactive-HF Orbitrap instrument. We identified 7,314 proteins based on 130,728 peptides. Results were confirmed in an independent set of biopsies collected from three additional individuals. Comparative analysis against data from post-mortem samples showed enhanced quantitative power and confidence level in samples collected from living hearts. Our analysis, combined with data from genome wide association studies suggested candidate gene associations to MVP, identified higher abundance in ventricle for proteins associated with cardiomyopathies and revealed the dilated LA proteome, demonstrating differential representation of molecules previously associated with AF, in non-AF hearts.This is the largest dataset of cardiac protein expression from human samples collected in vivo It provides a comprehensive resource that allows insight into molecular fingerprints of MVP and facilitates novel inferences between genomic data and disease mechanisms. We propose that over-representation of proteins in ventricle is consequent not to redundancy but to functional need, and conclude that changes in abundance of proteins known to associate with AF are not sufficient for arrhythmogenesis.
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Affiliation(s)
- Nora Linscheid
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen N, Denmark
| | - Pi Camilla Poulsen
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen N, Denmark
| | - Ida Dalgaard Pedersen
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen N, Denmark
| | - Emilie Gregers
- Laboratory for Molecular Cardiology, the Heart Centre, Rigshospitalet, Denmark
| | | | - Morten Salling Olesen
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen N, Denmark
| | - Jesper Velgaard Olsen
- The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen N, Denmark
| | - Mario Delmar
- Leon H Charney Division of Cardiology, NYU School of Medicine, New York, New York, USA
| | - Alicia Lundby
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen N, Denmark; The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen N, Denmark.
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20
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Scholman KT, Meijborg VMF, Gálvez-Montón C, Lodder EM, Boukens BJ. From Genome-Wide Association Studies to Cardiac Electrophysiology: Through the Maze of Biological Complexity. Front Physiol 2020; 11:557. [PMID: 32536879 PMCID: PMC7267057 DOI: 10.3389/fphys.2020.00557] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 05/04/2020] [Indexed: 12/19/2022] Open
Abstract
Genome Wide Association Studies (GWAS) have provided an enormous amount of data on genomic loci associated with cardiac electrophysiology and arrhythmias. Clinical relevance, however, remains unclear since GWAS do not provide a mechanistic explanation for this association. Determining the electrophysiological relevance of variants for arrhythmias would aid development of risk stratification models for patients with arrhythmias. In this review, we give an overview of genetic variants related to ECG intervals and arrhythmogenic pathologies and discuss how these variants may influence cardiac electrophysiology and the occurrence of arrhythmias.
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Affiliation(s)
- Koen T Scholman
- Department of Medical Biology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Veronique M F Meijborg
- Department of Experimental Cardiology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Netherlands Heart Institute, Utrecht, Netherlands
| | - Carolina Gálvez-Montón
- ICREC Research Program, Germans Trias i Pujol Health Science Research Institute, Badalona, Spain.,CIBERCV, Instituto de Salud Carlos III, Madrid, Spain
| | - Elisabeth M Lodder
- Department of Experimental Cardiology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Bastiaan J Boukens
- Department of Medical Biology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Cardiology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
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21
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Zacchigna S, Paldino A, Falcão-Pires I, Daskalopoulos EP, Dal Ferro M, Vodret S, Lesizza P, Cannatà A, Miranda-Silva D, Lourenço AP, Pinamonti B, Sinagra G, Weinberger F, Eschenhagen T, Carrier L, Kehat I, Tocchetti CG, Russo M, Ghigo A, Cimino J, Hirsch E, Dawson D, Ciccarelli M, Oliveti M, Linke WA, Cuijpers I, Heymans S, Hamdani N, de Boer M, Duncker DJ, Kuster D, van der Velden J, Beauloye C, Bertrand L, Mayr M, Giacca M, Leuschner F, Backs J, Thum T. Towards standardization of echocardiography for the evaluation of left ventricular function in adult rodents: a position paper of the ESC Working Group on Myocardial Function. Cardiovasc Res 2020; 117:43-59. [PMID: 32365197 DOI: 10.1093/cvr/cvaa110] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 01/28/2020] [Accepted: 04/24/2020] [Indexed: 12/11/2022] Open
Abstract
Echocardiography is a reliable and reproducible method to assess non-invasively cardiac function in clinical and experimental research. Significant progress in the development of echocardiographic equipment and transducers has led to the successful translation of this methodology from humans to rodents, allowing for the scoring of disease severity and progression, testing of new drugs, and monitoring cardiac function in genetically modified or pharmacologically treated animals. However, as yet, there is no standardization in the procedure to acquire echocardiographic measurements in small animals. This position paper focuses on the appropriate acquisition and analysis of echocardiographic parameters in adult mice and rats, and provides reference values, representative images, and videos for the accurate and reproducible quantification of left ventricular function in healthy and pathological conditions.
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Affiliation(s)
- Serena Zacchigna
- Department of Medicine, Surgery and Health Sciences and Cardiovascular Department, Centre for Translational Cardiology, Azienda Sanitaria Universitaria Giuliano Isontina, strada di Fiume 447, 34149 Trieste (TS), Italy.,International Center for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy
| | - Alessia Paldino
- Department of Medicine, Surgery and Health Sciences and Cardiovascular Department, Centre for Translational Cardiology, Azienda Sanitaria Universitaria Giuliano Isontina, strada di Fiume 447, 34149 Trieste (TS), Italy
| | - Inês Falcão-Pires
- Cardiovascular Research and Development Center, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Evangelos P Daskalopoulos
- Pole of Cardiovascular Research, Institut de Recherche Expérimentale et Clinique (IREC), Université Catholique de Louvain (UCLouvain), Belgium, Brussels
| | - Matteo Dal Ferro
- Department of Medicine, Surgery and Health Sciences and Cardiovascular Department, Centre for Translational Cardiology, Azienda Sanitaria Universitaria Giuliano Isontina, strada di Fiume 447, 34149 Trieste (TS), Italy
| | - Simone Vodret
- International Center for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy
| | - Pierluigi Lesizza
- Department of Medicine, Surgery and Health Sciences and Cardiovascular Department, Centre for Translational Cardiology, Azienda Sanitaria Universitaria Giuliano Isontina, strada di Fiume 447, 34149 Trieste (TS), Italy
| | - Antonio Cannatà
- Department of Medicine, Surgery and Health Sciences and Cardiovascular Department, Centre for Translational Cardiology, Azienda Sanitaria Universitaria Giuliano Isontina, strada di Fiume 447, 34149 Trieste (TS), Italy
| | - Daniela Miranda-Silva
- Cardiovascular Research and Development Center, Faculty of Medicine, University of Porto, Porto, Portugal
| | - André P Lourenço
- Cardiovascular Research and Development Center, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Bruno Pinamonti
- Department of Medicine, Surgery and Health Sciences and Cardiovascular Department, Centre for Translational Cardiology, Azienda Sanitaria Universitaria Giuliano Isontina, strada di Fiume 447, 34149 Trieste (TS), Italy
| | - Gianfranco Sinagra
- Department of Medicine, Surgery and Health Sciences and Cardiovascular Department, Centre for Translational Cardiology, Azienda Sanitaria Universitaria Giuliano Isontina, strada di Fiume 447, 34149 Trieste (TS), Italy
| | - Florian Weinberger
- Institute of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Germany
| | - Thomas Eschenhagen
- Institute of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Germany
| | - Lucie Carrier
- Institute of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Germany
| | - Izhak Kehat
- Department of Physiology, Biophysics and System Biology, The Ruth and Bruce Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel
| | - Carlo G Tocchetti
- Department of Translational Medical Sciences, Federico II University, Naples, Italy.,Interdepartmental Center of Clinical and Translational Research (CIRCET), Federico II University, Naples, Italy
| | - Michele Russo
- Department of Translational Medical Sciences, Federico II University, Naples, Italy.,Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Torino, Italy
| | - Alessandra Ghigo
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Torino, Italy
| | - James Cimino
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Torino, Italy
| | - Emilio Hirsch
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Torino, Italy
| | - Dana Dawson
- School of Medicine and Dentistry, University of Aberdeen, Aberdeen, UK
| | | | | | - Wolfgang A Linke
- Institute of Physiology 2, University of Muenster, Muenster, Germany
| | - Ilona Cuijpers
- Maastricht University Medical Centre, Maastricht University, Maastricht, The Netherlands.,Center of Molecular and Vascular Biology (CMVB), KU Leuven, Leuven, Belgium
| | - Stephane Heymans
- Maastricht University Medical Centre, Maastricht University, Maastricht, The Netherlands.,Center of Molecular and Vascular Biology (CMVB), KU Leuven, Leuven, Belgium
| | - Nazha Hamdani
- Department of Molecular and Experimental Cardiology, Division Cardiology, St. Josef-Hospital, Ruhr University Bochum, Bochum, Germany.,Institute of Physiology, Ruhr University Bochum, Bochum, Germany
| | - Martine de Boer
- Division of Experimental Cardiology, Department of Cardiology, Thoraxcenter, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Dirk J Duncker
- Division of Experimental Cardiology, Department of Cardiology, Thoraxcenter, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Diederik Kuster
- Department of Physiology, Amsterdam UMC, Vrije Universiteit, Amsterdam Cardiovascular Sciences Institute, Amsterdam, The Netherlands
| | - Jolanda van der Velden
- Department of Physiology, Amsterdam UMC, Vrije Universiteit, Amsterdam Cardiovascular Sciences Institute, Amsterdam, The Netherlands
| | - Christophe Beauloye
- Pole of Cardiovascular Research, Institut de Recherche Expérimentale et Clinique (IREC), Université Catholique de Louvain (UCLouvain), Belgium, Brussels.,Division of Cardiology, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - Luc Bertrand
- Pole of Cardiovascular Research, Institut de Recherche Expérimentale et Clinique (IREC), Université Catholique de Louvain (UCLouvain), Belgium, Brussels
| | - Manuel Mayr
- King's College London, British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine & Sciences, London, UK
| | - Mauro Giacca
- Department of Medicine, Surgery and Health Sciences and Cardiovascular Department, Centre for Translational Cardiology, Azienda Sanitaria Universitaria Giuliano Isontina, strada di Fiume 447, 34149 Trieste (TS), Italy.,International Center for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy.,King's College London, British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine & Sciences, London, UK
| | - Florian Leuschner
- Institute of Experimental Cardiology, Department of Cardiology, Angiology & Pulmology, Heidelberg University Hospital, Heidelberg, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Heidelberg, Germany
| | - Johannes Backs
- Institute of Experimental Cardiology, Department of Cardiology, Angiology & Pulmology, Heidelberg University Hospital, Heidelberg, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Heidelberg, Germany
| | - Thomas Thum
- Institute for Molecular and Translational Therapeutic Strategies (IMTTS), Hannover Medical School, Hannover, Germany.,REBIRTH Center for Translational Regenerative Medicine, Hannover Medical School, Hannover, Germany
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22
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Duan X, Cai L, Schmidt EJ, Shen J, Tycksen ED, O’Keefe R, Cheverud JM, Farooq Rai M. RNA-seq analysis of chondrocyte transcriptome reveals genetic heterogeneity in LG/J and SM/J murine strains. Osteoarthritis Cartilage 2020; 28:516-527. [PMID: 31945456 PMCID: PMC7108965 DOI: 10.1016/j.joca.2020.01.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 01/02/2020] [Accepted: 01/03/2020] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To investigate the transcriptomic differences in chondrocytes obtained from LG/J (large, healer) and SM/J (small, non-healer) murine strains in an attempt to discern the molecular pathways implicated in cartilage regeneration and susceptibility to osteoarthritis (OA). DESIGN We performed RNA-sequencing on chondrocytes derived from LG/J (n = 16) and SM/J (n = 16) mice. We validated the expression of candidate genes and compared single nucleotide polymorphisms (SNPs) between the two mouse strains. We also examined gene expression of positional candidates for ear pinna regeneration and long bone length quantitative trait loci (QTLs) that display differences in cartilaginous expression. RESULTS We observed a distinct genetic heterogeneity between cells derived from LG/J and SM/J mouse strains. We found that gene ontologies representing cell development, cartilage condensation, and regulation of cell differentiation were enriched in LG/J chondrocytes. In contrast, gene ontologies enriched in the SM/J chondrocytes were mainly related to inflammation and degeneration. Moreover, SNP analysis revealed that multiple validated genes vary in sequence between LG/J and SM/J in coding and highly conserved noncoding regions. Finally, we showed that most QTLs have 20-30% of their positional candidates displaying differential expression between the two mouse strains. CONCLUSIONS While the enrichment of pathways related to cell differentiation, cartilage development and cartilage condensation infers superior healing potential of LG/J strain, the enrichment of pathways related to cytokine production, immune cell activation and inflammation entails greater susceptibility of SM/J strain to OA. These data provide novel insights into chondrocyte transcriptome and aid in identification of the quantitative trait genes and molecular differences underlying the phenotypic differences associated with individual QTLs.
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Affiliation(s)
- Xin Duan
- Department of Orthopedic Surgery, Musculoskeletal Research Center, Washington University School of Medicine, St. Louis, MO, United States
| | - Lei Cai
- Department of Orthopedic Surgery, Musculoskeletal Research Center, Washington University School of Medicine, St. Louis, MO, United States
| | - Eric J. Schmidt
- School of Physician Assistant Medicine, College of Health Sciences, University of Lynchburg, Lynchburg, VA, United States
| | - Jie Shen
- Department of Orthopedic Surgery, Musculoskeletal Research Center, Washington University School of Medicine, St. Louis, MO, United States
| | - Eric D. Tycksen
- Genome Technology Access Center, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Regis O’Keefe
- Department of Orthopedic Surgery, Musculoskeletal Research Center, Washington University School of Medicine, St. Louis, MO, United States
| | - James M. Cheverud
- Department of Biology, Loyola University, Chicago, IL, United States
| | - Muhammad Farooq Rai
- Department of Orthopedic Surgery, Musculoskeletal Research Center, Washington University School of Medicine, St. Louis, MO, United States, Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, MO, United States
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23
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Demonbreun AR, Wyatt EJ, Fallon KS, Oosterbaan CC, Page PG, Hadhazy M, Quattrocelli M, Barefield DY, McNally EM. A gene-edited mouse model of limb-girdle muscular dystrophy 2C for testing exon skipping. Dis Model Mech 2019; 13:dmm040832. [PMID: 31582396 PMCID: PMC6906631 DOI: 10.1242/dmm.040832] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 09/23/2019] [Indexed: 12/21/2022] Open
Abstract
Limb-girdle muscular dystrophy type 2C is caused by autosomal recessive mutations in the γ-sarcoglycan (SGCG) gene. The most common SGCG mutation is a single nucleotide deletion from a stretch of five thymine residues in SGCG exon 6 (521ΔT). This founder mutation disrupts the transcript reading frame, abolishing protein expression. An antisense oligonucleotide exon-skipping method to reframe the human 521ΔT transcript requires skipping four exons to generate a functional, internally truncated protein. In vivo evaluation of this multi-exon skipping, antisense-mediated therapy requires a genetically appropriate mouse model. The human and mouse γ-sarcoglycan genes are highly homologous in sequence and gene structure, including the exon 6 region harboring the founder mutation. Herein, we describe a new mouse model of this form of limb-girdle muscular dystrophy generated using CRISPR/Cas9-mediated gene editing to introduce a single thymine deletion in murine exon 6, recreating the 521ΔT point mutation in Sgcg These mice express the 521ΔT transcript, lack γ-sarcoglycan protein and exhibit a severe dystrophic phenotype. Phenotypic characterization demonstrated reduced muscle mass, increased sarcolemmal leak and fragility, and decreased muscle function, consistent with the human pathological findings. Furthermore, we showed that intramuscular administration of a murine-specific multiple exon-directed antisense oligonucleotide cocktail effectively corrected the 521ΔT reading frame. These data demonstrate a molecularly and pathologically suitable model for in vivo testing of a multi-exon skipping strategy to advance preclinical development of this genetic correction approach.
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Affiliation(s)
- Alexis R Demonbreun
- Center for Genetic Medicine, Northwestern University, Chicago, IL 60611, USA
- Department of Pharmacology, Northwestern University, Chicago, IL 60611, USA
| | - Eugene J Wyatt
- Center for Genetic Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Katherine S Fallon
- Center for Genetic Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Claire C Oosterbaan
- Center for Genetic Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Patrick G Page
- Center for Genetic Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Michele Hadhazy
- Center for Genetic Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Mattia Quattrocelli
- Center for Genetic Medicine, Northwestern University, Chicago, IL 60611, USA
| | - David Y Barefield
- Center for Genetic Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Elizabeth M McNally
- Center for Genetic Medicine, Northwestern University, Chicago, IL 60611, USA
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24
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Brodehl A, Ebbinghaus H, Deutsch MA, Gummert J, Gärtner A, Ratnavadivel S, Milting H. Human Induced Pluripotent Stem-Cell-Derived Cardiomyocytes as Models for Genetic Cardiomyopathies. Int J Mol Sci 2019; 20:ijms20184381. [PMID: 31489928 PMCID: PMC6770343 DOI: 10.3390/ijms20184381] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 08/29/2019] [Accepted: 09/03/2019] [Indexed: 12/17/2022] Open
Abstract
In the last few decades, many pathogenic or likely pathogenic genetic mutations in over hundred different genes have been described for non-ischemic, genetic cardiomyopathies. However, the functional knowledge about most of these mutations is still limited because the generation of adequate animal models is time-consuming and challenging. Therefore, human induced pluripotent stem cells (iPSCs) carrying specific cardiomyopathy-associated mutations are a promising alternative. Since the original discovery that pluripotency can be artificially induced by the expression of different transcription factors, various patient-specific-induced pluripotent stem cell lines have been generated to model non-ischemic, genetic cardiomyopathies in vitro. In this review, we describe the genetic landscape of non-ischemic, genetic cardiomyopathies and give an overview about different human iPSC lines, which have been developed for the disease modeling of inherited cardiomyopathies. We summarize different methods and protocols for the general differentiation of human iPSCs into cardiomyocytes. In addition, we describe methods and technologies to investigate functionally human iPSC-derived cardiomyocytes. Furthermore, we summarize novel genome editing approaches for the genetic manipulation of human iPSCs. This review provides an overview about the genetic landscape of inherited cardiomyopathies with a focus on iPSC technology, which might be of interest for clinicians and basic scientists interested in genetic cardiomyopathies.
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Affiliation(s)
- Andreas Brodehl
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.
| | - Hans Ebbinghaus
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.
| | - Marcus-André Deutsch
- Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Center NRW, University Hospital Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.
| | - Jan Gummert
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.
- Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Center NRW, University Hospital Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.
| | - Anna Gärtner
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.
| | - Sandra Ratnavadivel
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.
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25
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Lahm H, Dreßen M, Beck N, Doppler S, Deutsch MA, Matsushima S, Neb I, König KC, Sideris K, Voss S, Eschenbach L, Puluca N, Deisenhofer I, Doll S, Holdenrieder S, Mann M, Lange R, Krane M. Myosin binding protein H-like (MYBPHL): a promising biomarker to predict atrial damage. Sci Rep 2019; 9:9986. [PMID: 31292467 PMCID: PMC6620353 DOI: 10.1038/s41598-019-46123-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 06/20/2019] [Indexed: 02/08/2023] Open
Abstract
Myosin binding protein H-like (MYBPHL) is a protein associated with myofilament structures in atrial tissue. The protein exists in two isoforms that share an identical amino acid sequence except for a deletion of 23 amino acids in isoform 2. In this study, MYBPHL was found to be expressed preferentially in atrial tissue. The expression of isoform 2 was almost exclusively restricted to the atria and barely detectable in the ventricle, arteria mammaria interna, and skeletal muscle. After atrial damage induced by cryo- or radiofrequency ablation, MYBPHL was rapidly and specifically released into the peripheral circulation in a time-dependent manner. The plasma MYBPHL concentration remained substantially elevated up to 24 hours after the arrival of patients at the intensive care unit. In addition, the recorded MYBPHL values were strongly correlated with those of the established biomarker CK-MB. In contrast, an increase in MYBPHL levels was not evident in patients undergoing aortic valve replacement or transcatheter aortic valve implantation. In these patients, the values remained virtually constant and never exceeded the concentration in the plasma of healthy controls. Our findings suggest that MYBPHL can be used as a precise and reliable biomarker to specifically predict atrial myocardial damage.
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Affiliation(s)
- Harald Lahm
- Department of Cardiovascular Surgery, Division of Experimental Surgery, Institute Insure (Institute for Translational Cardiac Surgery), German Heart Center Munich at the Technical University of Munich, Munich, Germany.
| | - Martina Dreßen
- Department of Cardiovascular Surgery, Division of Experimental Surgery, Institute Insure (Institute for Translational Cardiac Surgery), German Heart Center Munich at the Technical University of Munich, Munich, Germany
| | - Nicole Beck
- Department of Cardiovascular Surgery, Division of Experimental Surgery, Institute Insure (Institute for Translational Cardiac Surgery), German Heart Center Munich at the Technical University of Munich, Munich, Germany
| | - Stefanie Doppler
- Department of Cardiovascular Surgery, Division of Experimental Surgery, Institute Insure (Institute for Translational Cardiac Surgery), German Heart Center Munich at the Technical University of Munich, Munich, Germany
| | - Marcus-André Deutsch
- Department of Thoracic and Cardiovascular Surgery, Herz- und Diabeteszentrum NRW, University Hospital Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Shunsuke Matsushima
- Department of Cardiovascular Surgery, Division of Experimental Surgery, Institute Insure (Institute for Translational Cardiac Surgery), German Heart Center Munich at the Technical University of Munich, Munich, Germany
| | - Irina Neb
- Department of Cardiovascular Surgery, Division of Experimental Surgery, Institute Insure (Institute for Translational Cardiac Surgery), German Heart Center Munich at the Technical University of Munich, Munich, Germany
| | - Karl Christian König
- Department of Cardiovascular Surgery, Division of Experimental Surgery, Institute Insure (Institute for Translational Cardiac Surgery), German Heart Center Munich at the Technical University of Munich, Munich, Germany
| | - Konstantinos Sideris
- Department of Cardiovascular Surgery, Division of Experimental Surgery, Institute Insure (Institute for Translational Cardiac Surgery), German Heart Center Munich at the Technical University of Munich, Munich, Germany
| | - Stefanie Voss
- Department of Cardiovascular Surgery, Division of Experimental Surgery, Institute Insure (Institute for Translational Cardiac Surgery), German Heart Center Munich at the Technical University of Munich, Munich, Germany
| | - Lena Eschenbach
- Department of Cardiovascular Surgery, Division of Experimental Surgery, Institute Insure (Institute for Translational Cardiac Surgery), German Heart Center Munich at the Technical University of Munich, Munich, Germany
| | - Nazan Puluca
- Department of Cardiovascular Surgery, Division of Experimental Surgery, Institute Insure (Institute for Translational Cardiac Surgery), German Heart Center Munich at the Technical University of Munich, Munich, Germany
| | - Isabel Deisenhofer
- Department of Cardiovascular Disease, German Heart Center Munich at the Technical University of Munich, Munich, Germany
| | - Sophia Doll
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Stefan Holdenrieder
- Institute of Laboratory Medicine, German Heart Center Munich, Munich, Germany
| | - Matthias Mann
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany.,Novo Nordisk Foundation Center for Protein Research, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Rüdiger Lange
- Department of Cardiovascular Surgery, Division of Experimental Surgery, Institute Insure (Institute for Translational Cardiac Surgery), German Heart Center Munich at the Technical University of Munich, Munich, Germany.,DZHK (German Center for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
| | - Markus Krane
- Department of Cardiovascular Surgery, Division of Experimental Surgery, Institute Insure (Institute for Translational Cardiac Surgery), German Heart Center Munich at the Technical University of Munich, Munich, Germany.,DZHK (German Center for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
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26
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Aubert G, Barefield DY, Demonbreun AR, Ramratnam M, Fallon KS, Warner JL, Rossi AE, Hadhazy M, Makielski JC, McNally EM. Deletion of Sulfonylurea Receptor 2 in the Adult Myocardium Enhances Cardiac Glucose Uptake and Is Cardioprotective. JACC Basic Transl Sci 2019; 4:251-268. [PMID: 31061927 PMCID: PMC6488756 DOI: 10.1016/j.jacbts.2018.11.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 11/24/2018] [Accepted: 11/26/2018] [Indexed: 11/05/2022]
Abstract
In the heart, SUR2 couples with a potassium channel to form an adenosine triphosphate–sensitive complex that responds to the energy state of the cell. The authors deleted SUR2 in adult cardiomyocytes and found a shift of the heart toward glycolytic metabolism, which is protective under cardiac stress. SUR2 was found to complex with glucose transporter type 4, the major glucose transporter. Drugs that antagonize the SUR2 receptor may be cardioprotective and useful for managing heart failure.
The adult myocardium relies on oxidative metabolism. In ischemic myocardium, such as the embryonic heart, glycolysis contributes more prominently as a fuel source. The sulfonylurea receptor 2 (SUR2) was previously implicated in the normal myocardial transition from glycolytic to oxidative metabolism that occurs during adaptation to postnatal life. This receptor was now selectively deleted in adult mouse myocardium resulting in protection from ischemia reperfusion injury. SUR2-deleted cardiomyocytes had enhanced glucose uptake, and SUR2 forms a complex with the major glucose transporter. These data identify the SUR2 receptor as a target to shift cardiac metabolism to protect against myocardial injury.
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Key Words
- 2DG, 2-deoxy-D-glucose
- ABCC9
- EDTA, ethylenediaminetetraacetic acid
- FL Ex5, LoxP sites flanking exon 5
- GFP, green fluorescent protein
- GLUT, glucose transporter
- HEK293T, human embryonic kidney 293T
- KATP, adenosine triphosphate–sensitive potassium
- Kir, inward rectifying potassium channel
- LVDP, left ventricular developed pressure
- MCM, αMHC-MerCreMer
- PCR, polymerase chain reaction
- SUR, sulfonylurea receptor
- ischemia
- potassium ATP channels
- sulfonylurea
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Affiliation(s)
- Gregory Aubert
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago Illinois
| | - David Y Barefield
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago Illinois
| | - Alexis R Demonbreun
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago Illinois
| | - Mohun Ramratnam
- Division of Cardiology, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Katherine S Fallon
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago Illinois
| | - James L Warner
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago Illinois
| | - Ann E Rossi
- Section of Cardiology, University of Chicago, Chicago Illinois
| | - Michele Hadhazy
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago Illinois
| | - Jonathan C Makielski
- Division of Cardiology, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
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Kim EY, Barefield DY, Vo AH, Gacita AM, Schuster EJ, Wyatt EJ, Davis JL, Dong B, Sun C, Page P, Dellefave-Castillo L, Demonbreun A, Zhang HF, McNally EM. Distinct pathological signatures in human cellular models of myotonic dystrophy subtypes. JCI Insight 2019; 4:122686. [PMID: 30730308 DOI: 10.1172/jci.insight.122686] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 01/31/2019] [Indexed: 01/06/2023] Open
Abstract
Myotonic dystrophy (DM) is the most common autosomal dominant muscular dystrophy and encompasses both skeletal muscle and cardiac complications. DM is nucleotide repeat expansion disorder in which type 1 (DM1) is due to a trinucleotide repeat expansion on chromosome 19 and type 2 (DM2) arises from a tetranucleotide repeat expansion on chromosome 3. Developing representative models of DM in animals has been challenging due to instability of nucleotide repeat expansions, especially for DM2, which is characterized by nucleotide repeat expansions often greater than 5,000 copies. To investigate mechanisms of human DM, we generated cellular models of DM1 and DM2. We used regulated MyoD expression to reprogram urine-derived cells into myotubes. In this myogenic cell model, we found impaired dystrophin expression, in the presence of muscleblind-like 1 (MBNL1) foci, and aberrant splicing in DM1 but not in DM2 cells. We generated induced pluripotent stem cells (iPSC) from healthy controls and DM1 and DM2 subjects, and we differentiated these into cardiomyocytes. DM1 and DM2 cells displayed an increase in RNA foci concomitant with cellular differentiation. iPSC-derived cardiomyocytes from DM1 but not DM2 had aberrant splicing of known target genes and MBNL sequestration. High-resolution imaging revealed tight association between MBNL clusters and RNA foci in DM1. Ca2+ transients differed between DM1- and DM2 iPSC-derived cardiomyocytes, and each differed from healthy control cells. RNA-sequencing from DM1- and DM2 iPSC-derived cardiomyocytes revealed distinct misregulation of gene expression, as well as differential aberrant splicing patterns. Together, these data support that DM1 and DM2, despite some shared clinical and molecular features, have distinct pathological signatures.
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Affiliation(s)
- Ellis Y Kim
- Molecular Pathogenesis and Molecular Medicine, The University of Chicago, Chicago, Illinois, USA
| | - David Y Barefield
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Andy H Vo
- Committee on Development, Regeneration, and Stem Cell Biology, The University of Chicago, Chicago, Illinois, USA
| | - Anthony M Gacita
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Emma J Schuster
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Eugene J Wyatt
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | | | - Biqin Dong
- Department of Biomedical Engineering and.,Department of Mechanical Engineering, Northwestern University, Evanston, Illinois, USA
| | - Cheng Sun
- Department of Mechanical Engineering, Northwestern University, Evanston, Illinois, USA
| | - Patrick Page
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Lisa Dellefave-Castillo
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Alexis Demonbreun
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | | | - Elizabeth M McNally
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
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Affiliation(s)
- Calum A MacRae
- From Cardiovascular Medicine Division, Brigham and Women's Hospital, Departments of Medicine (C.A.M., C.E.S.) and Genetics (C.E.S.), Harvard Medical School, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Christine E Seidman
- From Cardiovascular Medicine Division, Brigham and Women's Hospital, Departments of Medicine (C.A.M., C.E.S.) and Genetics (C.E.S.), Harvard Medical School, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.).
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Identification and Functional Characterization of an ISL1 Mutation Predisposing to Dilated Cardiomyopathy. J Cardiovasc Transl Res 2018; 12:257-267. [DOI: 10.1007/s12265-018-9851-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Accepted: 12/03/2018] [Indexed: 02/06/2023]
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30
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Barefield DY, Garbincius JF. Highlights from the American Heart Association's Basic Cardiovascular Science 2018 Scientific Sessions. J Am Heart Assoc 2018; 7:e011097. [PMID: 30571479 PMCID: PMC6404426 DOI: 10.1161/jaha.118.011097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Affiliation(s)
- David Y Barefield
- 1 Center for Genetic Medicine Feinberg School of Medicine Northwestern University Chicago IL
| | - Joanne F Garbincius
- 2 Center for Translational Medicine Department of Pharmacology Lewis Katz School of Medicine Temple University Philadelphia PA
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Johnson EK, Matkovich SJ, Nerbonne JM. Regional Differences in mRNA and lncRNA Expression Profiles in Non-Failing Human Atria and Ventricles. Sci Rep 2018; 8:13919. [PMID: 30224797 PMCID: PMC6141608 DOI: 10.1038/s41598-018-32154-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 08/22/2018] [Indexed: 01/27/2023] Open
Abstract
The four chambers of the human heart play distinct roles in the maintenance of normal cardiac function, and are differentially affected by inherited/acquired cardiovascular disease. To probe the molecular determinants of these functional differences, we examined mRNA and lncRNA expression profiles in the left (LA) and right (RA) atria, the left (LV) and right (RV) ventricles, and the interventricular septum (IVS) of non-failing human hearts (N = 8). Analysis of paired atrial and ventricular samples (n = 40) identified 5,747 mRNAs and 2,794 lncRNAs that were differentially (>1.5 fold; FDR < 0.05) expressed. The largest differences were observed in comparisons between the atrial (RA/LA) and ventricular (RV/LV/IVS) samples. In every case (e.g., LA vs LV, LA vs RV, etc.), >2,300 mRNAs and >1,200 lncRNAs, corresponding to 17-28% of the total transcripts, were differentially expressed. Heterogeneities in mRNA/lncRNA expression profiles in the LA and RA, as well as in the LV, RV and IVS, were also revealed, although the numbers of differentially expressed transcripts were substantially smaller. Gender differences in mRNA and lncRNA expression profiles were also evident in non-failing human atria and ventricles. Gene ontology classification of differentially expressed gene sets revealed chamber-specific enrichment of numerous signaling pathways.
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Affiliation(s)
- Eric K Johnson
- Department of Medicine, Cardiovascular Division, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Scot J Matkovich
- Department of Medicine, Cardiovascular Division, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Jeanne M Nerbonne
- Department of Medicine, Cardiovascular Division, Washington University School of Medicine, St. Louis, MO, 63110, USA.
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO, 63110, USA.
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Huang L, Yuan P, Yu P, Kong Q, Xu Z, Yan X, Shen Y, Yang J, Wan R, Hong K, Tang Y, Hu J. O-GlcNAc-modified SNAP29 inhibits autophagy-mediated degradation via the disturbed SNAP29-STX17-VAMP8 complex and exacerbates myocardial injury in type I diabetic rats. Int J Mol Med 2018; 42:3278-3290. [PMID: 30221662 PMCID: PMC6202107 DOI: 10.3892/ijmm.2018.3866] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 08/29/2018] [Indexed: 12/19/2022] Open
Abstract
The O-linked β-N-acetylglucosamine (O-GlcNAc) modification and autophagy are associated with diabetic myocardial injury, however, the molecular mechanisms between the two processes remain to be fully elucidated. The purpose of the present study was to elucidate the molecular regulation of autophagy by O-GlcNAc-modified synaptosomal-associated protein 29 (SNAP29) in diabetic myocardial injury. A rat model of type I diabetes was established via intraperitoneal injection of streptozotocin (STZ; 55 mg/kg). Significant increases in the O-GlcNAc modification and accumulation of the autophagy markers microtubule-associated protein 1 light chain 3α II/I and P62, which suggest that autophagic flux is inhibited, were observed in rats 8 weeks following STZ induction. Subsequently, the selective O-GlcNAcase inhibitor, thiamet G, increased the level of O-GlcNAc modification, which further disrupted autophagic flux; deteriorated cardiac diastolic function, as indicated by an increased left ventricular filling peak velocity/atrial contraction flow peak velocity ratio shown by echocardiography; and exacerbated myocardial abnormalities, as characterized by cardiomyocyte disorganization and fat and interstitial fibrosis accumulation. By contrast, 6-diazo-5-oxo-L-norleucine, an inhibitor of glucosamine fructose-6-phosphate aminotransferase isomerizing 1, acted as an O-GlcNAc antagonist and reduced the level of O-GlcNAc modification, which maintained autophagic flux and improved cardiac diastolic function. In vitro, high glucose (25 mM) was used to stimulate primary neonatal rat cardiomyocytes (NRCMs). Consistent with the myocardium of diabetic rats, it was also shown in the NRCMs that O-GlcNAc modification of SNAP29 negatively regulated autophagic flux. The application of the short hairpin RNA interference lysosome-associated membrane protein (LAMP2) and the autophagy inhibitor 3-methyladenine demonstrated that high glucose inhibited autophagy-mediated degradation rather than affected the initial stage of autophagy. Finally, co-immunoprecipitation was used to determine the role of the O-GlcNAc-modified substrate protein SNAP29, which acted as an SNAP29-syntaxin-17 (STX17)-vesicle-associated membrane protein 8 (VAMP8) complex during disease progression. The present study is the first, to the best of our knowledge, to demonstrate that SNAP29 is an O-GlcNAc substrate and that an increase in O-GlcNAc-modified SNAP29 inhibits SNAP29-STX17-VAMP8 complex formation, thereby inhibiting the degradation of autophagy and exacerbating myocardial injury in type I diabetic rats.
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Affiliation(s)
- Lin Huang
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Ping Yuan
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Peng Yu
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Qiling Kong
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Zixuan Xu
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Xia Yan
- The Jiangxi Key Laboratory of Molecular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Yang Shen
- The Jiangxi Key Laboratory of Molecular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Juesheng Yang
- Department of Cardiovascular Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Rong Wan
- The Jiangxi Key Laboratory of Molecular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Kui Hong
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Yanhua Tang
- Department of Cardiovascular Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Jinzhu Hu
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
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