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Unravelling the etiology of dilated cardiomyopathy through differential miRNA-mRNA interactome

ABSTRACT: Unravelling the etiology of dilated cardiomyopathy through differential miRNA-mRNA interactome

PROVIDER: PRJNA1018441 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26088052.fastq.gz	Fastqsanger.gz
	SRR26088053.fastq.gz	Fastqsanger.gz
	SRR26088054.fastq.gz	Fastqsanger.gz
	SRR26088055.fastq.gz	Fastqsanger.gz
	SRR26088056.fastq.gz	Fastqsanger.gz

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Unravelling the etiology of dilated cardiomyopathy through differential miRNA-mRNA interactome

Project description:Dilated cardiomyopathy (DCM) entails a broad group of diseases, acquired or genetic, that share a similar phenotype. The understanding of gene-specific pathogenetic mechanisms and the determination of the functional effects of each variant may tailor different therapeutic strategies. MicroRNAs (miRNAs) are short sequences of non-coding RNA that play an important role in the development of several cardiovascular diseases, including DCM. Here, we applied mRNA and small RNA sequencing to identify the gene and miRNA signature from myocardial biopsies from four patients with DCM caused by volume overload (VCM) and four with ischemic DCM (ICM). Analysis showed five miRNAs and 112 mRNAs dysregulated in VCM vs ICM. Differentially expressed genes were positively enriched for extracellular matrix (ECM), mitochondria respiration-related, cardiac muscle contraction and fatty acid pathways in VCM vs ICM, and negatively enriched for immune response-related pathways, JAK-STAT and NF-kappa B signaling pathways in VCM vs ICM. miRNA-mRNA interaction analysis revealed four negatively correlated miRNA-target transcript pairs, miR-218-5p-DDX6, miR-218-5p-TT39C, miR-218-5p-SEMA4A and miR-494-3p-SGMS2. qRT-PCR validation showed a strong correlation between RNA-seq and qRT-PCR for these genes and miRNAs. These findings suggest that transcriptome signatures may distinguish distinct etiologies of DCM shedding light on underlying biological differences between VCM and ICM.

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Unravelling Role of miRNA-mRNA Interactome in Pathophysiology of Arrhythmogenic Cardiomyopathy [mRNA-seq]

Project description:Arrhythmogenic cardiomyopathy is an inherited entity characterized by irregular cell-cell adhesion, cardiomyocyte death, fibro-fatty replacement of ventricular myocytes, leading to malignant ventricular arrythmias, contractile dysfunction and sudden cardiac death. Pathogenic variants in genes that encode desmosome are the predominant cause of arrhythmogenic cardiomyopathy. Moreover, signalling pathways such as Wnt/ß-catenin and transforming growth factor-β have been involved in the disease progression. However, still little is known about the molecular pathophysiological mechanisms that underlie arrhythmogenic cardiomyopathy pathogenesis. We used mRNA and small RNA sequencing to analyse the transcriptome of health and arrhythmogenic cardiomyopathy autopsied human hearts. Our results showed 697 differentially expressed genes, and eight differentially expressed miRNAs. Functional enrichment revealed mitochondrial respiratory-related pathways, impaired response to oxidative stress, apoptotic signalling pathway, inflammatory response-related and extracellular matrix response pathways. Furthermore, analysis of miRNA-mRNA interactome identified eleven negatively correlated miRNA-target pairs for arrhythmogenic cardiomyopathy. Our finding revealed novel arrhythmogenic cardiomyopathy-related miRNAs with important regulatory function in disease pathogenesis highlighting their value as potential key targets for therapeutic approaches.

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Project description:This study attempts at investigating the changes in cardiac gene expression that occur in Dilated Cardiomyopathy (DCM). DCM in Dobermans and Boxers are the focus of this study. Control heart tissue as well as Pacing tissue used is from mongrel dogs. Keywords: control vs pacing vs disease; strain specific disease 3 Dobermans-DCM, 4 Boxers-DCM, 3 mongrels-control and 3 mongrels-pacing

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