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Glezeva N, Moran B, Collier P, Moravec C, Phelan D, Donnellan E, Russell-Hallinan A, O'connor D, Gallagher W, Gallagher J, McDonald K, Ledwidge M, Baugh J, Das S, Watson C. 3069Epigenetic changes in heart failure cohorts: novel insights into methylation changes of protein and RNA coding genes in human cardiac tissue. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Limited knowledge exists of the extent of epigenetic alterations, such as DNA methylation, in Heart Failure (HF). We conducted targeted DNA methylation sequencing to identify DNA methylation alterations in coding and non-coding RNA across different etiological sub-types of HF.
Methods and results
A targeted bisulfite sequence capture sequencing platform was applied to DNA extracted from cardiac interventricular septal tissue of 30 male HF patients encompassing etiologies including Hypertrophic Obstructive Cardiomyopathy (HOCM, n=12), Ischemic Cardiomyopathy (ISCM, n=9), Dilated Cardiomyopathy (DCM, n=9), and 9 control patients with non-failing hearts (NF). We detected 62,678 differentially methylated regions (DMR) in the studied HF cohort. By comparing each HF sub-group to the NF control group we identified 195 unique DMRs: 5 in HOCM, 151 in DCM, and 55 in ISCM. These translated to 4 genes/1 non-coding RNA (ncRNA) in HOCM, 131 genes/17 ncRNA in DCM, and 51 genes/5 ncRNA in ISCM. Subsequent gene/ncRNA expression analysis was assessed using qRT-PCR and revealed 6 genes: 4 hypermethylated (HEY2, MSR1, MYOM3, COX17), 2 hypomethylated (CTGF, MMP2); and 2 microRNA: 1 hypermethylated (miR-24–1), 1 hypomethylated (miR-155) with significantly up- or down-regulated expression levels consistent with the direction of methylation in the particular HF sub-group.
Conclusions
For the first time DNA methylation alterations and associated gene expression changes were identified in etiologically-variant pathological heart failure tissue. The methylation-sensitive and disease-associated genes/non-coding RNA identified from this study represent a unique cohort of loci that demonstrate a plausible potential as a novel diagnostic and/or therapeutic target in HF and warrant further investigation.
Acknowledgement/Funding
Enterprise Ireland; European Regional Development Fund under Ireland's European Structural and Investment Funds Programmes 2014-2020
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Affiliation(s)
- N Glezeva
- University College Dublin, Conway Institute, Dublin, Ireland
| | - B Moran
- University College Dublin, Conway Institute, Dublin, Ireland
| | - P Collier
- Cleveland Clinic Foundation, Department of Cardiovascular Medicine, Cleveland, United States of America
| | - C Moravec
- Cleveland Clinic Foundation, Department of Molecular Cardiology, Lerner Research Institute, Cleveland, United States of America
| | - D Phelan
- Cleveland Clinic Foundation, Department of Cardiovascular Medicine, Cleveland, United States of America
| | - E Donnellan
- Cleveland Clinic Foundation, Department of Cardiovascular Medicine, Cleveland, United States of America
| | | | - D O'connor
- Royal College of Surgeons in Ireland, Department of Molecular and Cellular Therapeutics, Dublin, Ireland
| | - W Gallagher
- University College Dublin, Conway Institute, Dublin, Ireland
| | - J Gallagher
- St Vincent's University Hospital, Heart Failure Unit, Dublin, Ireland
| | - K McDonald
- St Vincent's University Hospital, Heart Failure Unit, Dublin, Ireland
| | - M Ledwidge
- St Vincent's University Hospital, Heart Failure Unit, Dublin, Ireland
| | - J Baugh
- University College Dublin, Conway Institute, Dublin, Ireland
| | - S Das
- Royal College of Surgeons in Ireland, Department of Molecular and Cellular Therapeutics, Dublin, Ireland
| | - C Watson
- Queen's University of Belfast, Wellcome-Wolfson Institute for Experimental Medicine, Belfast, United Kingdom
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Abstract
The population of heavy ions in lo's torus is ultimately derived from lo volcanism. Groundbased infrared observations of lo between October 1991 and March 1992, contemporaneous with the 8 February 1992 Ulysses observations of the lo torus, show that volcanic thermal emission was at the low end of the normal range at all lo longitudes during this period. In particular, the dominant hot spot Loki was quiescent. Resolved images show that there were at least four hot spots on lo's Jupiter-facing hemisphere, including Loki and a long-lived spot on the leading hemisphere (Kanehekili), of comparable 3.5-micrometer brightness but higher temperature.
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Abstract
Dermatofibrosarcoma protuberans (DFSP) of the vulva is a rare, low- to intermediate-grade sarcoma of dermal origin. This case report represents the 13th reported patient with vulvar DFSP and the first reported patient with metastatic vulvar DFSP. Although metastasis is rare, the possibility remains that the frequent recurrence of DFSP will eventually metastasize. Therefore, patients must be followed up on a long-term basis to monitor the progress of this potentially lethal cancer.
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Affiliation(s)
- T M Soergel
- Department of Obstetrics and Gynecology, University of Louisville School of Medicine, Louisville, Kentucky, 40202, USA
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