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Doñate Puertas R, Meugnier E, Romestaing C, Rey C, Morel E, Lachuer J, Gadot N, Scridon A, Julien C, Tronc F, Chapuis B, Valla C, Janin A, Pirola L, Méjat A, Rome S, Chevalier P. Atrial fibrillation is associated with hypermethylation in human left atrium, and treatment with decitabine reduces atrial tachyarrhythmias in spontaneously hypertensive rats. Transl Res 2017; 184:57-67.e5. [PMID: 28427903 DOI: 10.1016/j.trsl.2017.03.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 03/13/2017] [Accepted: 03/17/2017] [Indexed: 10/19/2022]
Abstract
Atrial fibrillation (AF) is the most common cardiac arrhythmia. As the molecular mechanisms underlying the pathology are largely unknown, this cardiac arrhythmia remains difficult to treat. To identify specific molecular actors involved in AF, we have performed a transcriptomic analysis on left atrium (LA) from patients with valvular heart disease with or without AF. We showed that 1627 genes had altered basal expression level in LA tissue of AF patients compared with the control group. The significantly enriched gene ontology biological process "anatomical structure morphogenesis" contained the highest number of genes in line with changes in structure that occur when the human heart remodels following AF development (ie, LA dilatation and interstitial fibrosis). We then focused the study on Pitx2 (paired-like homeodomain 2), being the most altered transcription factor in LA from AF patients and from which compelling evidence have indicated that its reduced expression can be considered as a marker for the disease. In addition, its expression was inversely correlated with LA size. We demonstrated that AF is associated with Pitx2 promoter hypermethylation both in humans and arrhythmic aging spontaneously hypertensive rats. Chronic administration of a DNA methylation inhibitor (ie, 5-Aza-2'-deoxycitidine) improved ECG arrhythmic profiles and superoxide dismutase activities and reduced fibrosis in the left ventricle of spontaneously hypertensive rats. Taken together, these data support the notion that AF is associated with epigenetic changes in LA and provide a proof-of-concept that hypomethylating agents have to be considered in the treatment of atrial arrhythmias.
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Affiliation(s)
| | - E Meugnier
- CarMeN Laboratory (UMR INSERM 1060-INRA 1397, INSA), Lyon-Sud Faculty of Medicine, University of Lyon, Pierre-Bénite, France
| | - C Romestaing
- LEHNA Laboratory, CNRS, UMR 5023, University of Lyon, Villeurbanne, France
| | - C Rey
- ProfilXpert, UNIV-US7 INSERM-UMS 3453 CNRS, Lyon, France
| | - E Morel
- Rhythmology Unit, Louis Pradel Cardiology Hospital, Hospices Civils de Lyon, Bron, France
| | - J Lachuer
- ProfilXpert, UNIV-US7 INSERM-UMS 3453 CNRS, Lyon, France
| | - N Gadot
- Plateform Anipath, Laënnec Faculty of Medecine, University of Lyon, Lyon, France
| | - A Scridon
- Physiology Department, University of Medicine and Pharmacy of Tîrgu Mures, Tîrgu Mures, Romania
| | - C Julien
- EA 4612 Neurocardiology unit, University of Lyon, Lyon, France
| | - F Tronc
- Pneumology Unit, Louis Pradel Cardiology Hospital, Hospices Civils de Lyon, Bron, France
| | - B Chapuis
- EA 4612 Neurocardiology unit, University of Lyon, Lyon, France
| | - C Valla
- Institut NeuroMyoGene (INMG), UMR CNRS 5310-INSERM U1217 / University of Lyon, Lyon, France
| | - A Janin
- Institut NeuroMyoGene (INMG), UMR CNRS 5310-INSERM U1217 / University of Lyon, Lyon, France
| | - L Pirola
- CarMeN Laboratory (UMR INSERM 1060-INRA 1397, INSA), Lyon-Sud Faculty of Medicine, University of Lyon, Pierre-Bénite, France
| | - A Méjat
- Institut NeuroMyoGene (INMG), UMR CNRS 5310-INSERM U1217 / University of Lyon, Lyon, France
| | - S Rome
- CarMeN Laboratory (UMR INSERM 1060-INRA 1397, INSA), Lyon-Sud Faculty of Medicine, University of Lyon, Pierre-Bénite, France
| | - Philippe Chevalier
- EA 4612 Neurocardiology unit, University of Lyon, Lyon, France; Rhythmology Unit, Louis Pradel Cardiology Hospital, Hospices Civils de Lyon, Bron, France.
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Xiao J, Sluijter JPG, Das S, Yang Y, Shen Z. A snapshot of genetic and epigenetic basis of arrhythmia and heart failure. Front Genet 2015; 6:74. [PMID: 25784925 PMCID: PMC4347482 DOI: 10.3389/fgene.2015.00074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 02/12/2015] [Indexed: 11/18/2022] Open
Affiliation(s)
- Junjie Xiao
- Regeneration and Ageing Lab, Experimental Center of Life Sciences and Innovative Drug Research Center, School of Life Science, Shanghai University Shanghai, China ; Shanghai Key Laboratory of Bio-Energy Crops, School of Life Science, Shanghai University Shanghai, China
| | - Joost P G Sluijter
- Division Heart and Lungs, Department of Cardiology, University Medical Center Utrecht Utrecht, Netherlands
| | - Saumya Das
- Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Harvard University Boston, MA, USA
| | - Yiqing Yang
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University Shanghai, China
| | - Zhongming Shen
- Regeneration and Ageing Lab, Experimental Center of Life Sciences and Innovative Drug Research Center, School of Life Science, Shanghai University Shanghai, China ; Shanghai Key Laboratory of Bio-Energy Crops, School of Life Science, Shanghai University Shanghai, China
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