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The translational landscape of phenylephrine-treated neonatal rat cardiomyocytes [Ribo-seq]

ABSTRACT: The translational landscape of phenylephrine-treated neonatal rat cardiomyocytes [Ribo-seq]

PROVIDER: PRJNA655955 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12414240.fastq.gz	Fastqsanger.gz
	SRR12414241.fastq.gz	Fastqsanger.gz
	SRR12414242.fastq.gz	Fastqsanger.gz
	SRR12414243.fastq.gz	Fastqsanger.gz

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The translational landscape of phenylephrine-treated neonatal rat cardiomyocytes

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Project description:In this study, we generated nucleotide-resolution translatome as well as transcriptome data of isolated primary cardiomyocytes undergoing hypertrophy. More than 10,000 open reading frames (ORF) were detected from the deep sequencing of ribosome protected fragments orchestrating the shift of translatome in hypertrophied cardiomyocytes.We further identified more than 100 potential micropeptides encoded by uncharacterized small open reading frames (sORFs) in the long noncoding RNA genes. Over two-thirds of these micropeptide candidates were experimentally validated in a random test with three micropeptides showing regulatory function in cardiomyocyte hypertrophy via modulating the activities of Oxidative phosphorylation, Calcium signaling pathway, and MAPK signaling pathway.Our study provided a genome-wide overview of the translational controls of cardiomyocyte hypertrophy and demonstrated an unrecognized role of micropeptides in cardiomyocyte biology.

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Transcription profiling by array of Rattus norvegicus cardiomyocytes to investigate the effects of 30 or 60 min phenylephrine exposure on gene expression

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Transcription profiling of rat neonatal ventricular cardiomyocytes (NRVCMs) stretched biaxially (112%/24h) or stimulated with phenylephrine (PE, 50 uM

Project description:Neonatal rat ventricular cardiomyocytes (NRVCMs) were stretched biaxially (112%/24h) or stimulated with phenylephrine (PE, 50 uM), both resulting in a similar degree of hypertrophy. Unstretched NRVCMs served as negative control. Affymetrix microarray analysis revealed 164 genes more than 2.0-fold up- and 21 genes less than 0.5-fold downregulated (p<0.01). Differential expression was confirmed by real-time PCR. Several genes of the âfetal gene programâ, i.e. BNP (4.2-fold, all p<0.05) were induced by stretch as well as PE. We also verified the upregulation of known stretch-responsive genes, including HSP70 (20.9x) and c-myc (3.0x). Moreover, we identified genes exclusively induced by stretch, such as the cardioprotective and antihypertrophic cytokine GDF15 (24.8x) and the antihypertrophic factor heme oxygenase 1 (Hmox1, 10.8x; both confirmed on protein level). Of note, neither PE nor endothelin-1 were able to upregulate GDF15 and Hmox1, while angiotensin II significantly induced both genes. Conversely, addition of the AT1 receptor blocker irbesartan markedly blunted stretch-mediated GDF15 and Hmox1 induction, suggesting that the angiotensin II receptor mediates stretch-dependent signals. In conclusion, we report a comprehensive gene expression profile of cardiomyocytes subjected to biomechanical stress in comparison to pharmacologically induced hypertrophy. Our data imply that a stretch-specific gene program exists, that is mediated, at least in part, by angiotensin-II-dependent signalling. Experiment Overall Design: Three conditions were compared with two replicates each. These are: Experiment Overall Design: (1) control, i.e. no treatment; (2) induction by phenylephrine (50 uM); (3) induction by biomechanical stretch (112%/24h)

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