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Transcriptomics analysis of skeletal muscle in humans with heart failure

ABSTRACT: Transcriptomics analysis of skeletal muscle in humans with heart failure

PROVIDER: PRJEB35460 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR3671310.fastq.gz	Fastqsanger.gz
	ERR3671311.fastq.gz	Fastqsanger.gz
	ERR3671312.fastq.gz	Fastqsanger.gz
	ERR3671313.fastq.gz	Fastqsanger.gz
	ERR3671314.fastq.gz	Fastqsanger.gz

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Transcriptomics analysis of skeletal muscle in humans with heart failure

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Skeletal muscle derived Musclin protects the heart during pathological overload

Project description:Cachexia is associated with poor prognosis in patients with chronic heart failure. The underlying mechanisms of cachexia triggered heart failure progression, however, are not well understood. Here, we investigated whether the dysregulation of myokine expression from wasting skeletal muscle and impaired inter-organ crosstalk during advanced heart failure might contribute to progression of the disease. RNA sequencing analysis from wasting skeletal muscles of mice with cardiac cachexia during long-term pressure overload revealed a strongly reduced expression of Ostn. Ostn encodes for the skeletal muscle derived myokine Musclin, which had been previously implicated in the enhancement of natriuretic peptide (NP) signaling. Using newly developed skeletal muscle specific, inducible Ostn knock-out mice, we demonstrated that reduced skeletal muscle Musclin levels exaggerated cardiac dysfunction and myocardial fibrosis compared to littermate control mice after TAC. Restoration of Musclin deficiency during cardiac cachexia via AAV6-mediated skeletal muscle specific Musclin overexpression, in turn, attenuated left ventricular dysfunction and myocardial fibrosis. Mechanistically, we found that Musclin enhanced CNP/NPR2/cGMP signaling in cardiomyocytes, which led to improved contractility by inhibition of the cAMP degrading phosphodiesterase (PDE)3 and augmented cAMP/protein kinase A signaling. In addition, Musclin directly acted on cardiac fibroblasts to inhibit their activation. Together, our study indicates the therapeutic potential of targeting interorgan cross-talk during heart failure, for example by counteracting the impaired secretion of the Musclin from wasting skeletal muscle.

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Left ventricular samples from humans with ischemic heart failure and non-failing controls

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