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Background

Dicer endonuclease, critical for maturation of miRNAs, is depleted in certain forms of cardiomyopathy which results in differential expression of certain microRNAs. We sought to elucidate the mechanisms underlying the rapid loss of cardiac function following cardiac-specific Dicer depletion in adult mice.

Results

Conditional Dicer deletion in the adult murine myocardium demonstrated compromised heart function, mitochondrial dysfunction and oxidant stress. Elevated miR-15b was observed as an early response to Dicer depletion and was found to silence Pim-1 kinase, a protein responsible for maintaining mitochondrial integrity and function. Anti-miRNA based suppression of induced miRNA-15b rescued the function of Dicer-depleted adult heart and attenuated hypertrophy.

Conclusions

Anti-miRNA based suppression of inducible miRNA-15b can prevent rapid loss of cardiac function in a Dicer-depleted adult heart and can be a key approach worthy of therapeutic consideration."xsd:string
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http://purl.uniprot.org/citations/23840532http://purl.uniprot.org/core/author"Roy S."xsd:string
http://purl.uniprot.org/citations/23840532http://purl.uniprot.org/core/author"He G."xsd:string
http://purl.uniprot.org/citations/23840532http://purl.uniprot.org/core/author"Khanna S."xsd:string
http://purl.uniprot.org/citations/23840532http://purl.uniprot.org/core/author"Zweier J.L."xsd:string
http://purl.uniprot.org/citations/23840532http://purl.uniprot.org/core/author"Banerjee J."xsd:string
http://purl.uniprot.org/citations/23840532http://purl.uniprot.org/core/author"Pfeiffer D."xsd:string
http://purl.uniprot.org/citations/23840532http://purl.uniprot.org/core/author"Sen C.K."xsd:string
http://purl.uniprot.org/citations/23840532http://purl.uniprot.org/core/author"Gnyawali S.C."xsd:string
http://purl.uniprot.org/citations/23840532http://purl.uniprot.org/core/date"2013"xsd:gYear
http://purl.uniprot.org/citations/23840532http://purl.uniprot.org/core/name"PLoS One"xsd:string
http://purl.uniprot.org/citations/23840532http://purl.uniprot.org/core/pages"e66789"xsd:string
http://purl.uniprot.org/citations/23840532http://purl.uniprot.org/core/title"Suppression of Induced microRNA-15b Prevents Rapid Loss of Cardiac Function in a Dicer Depleted Model of Cardiac Dysfunction."xsd:string
http://purl.uniprot.org/citations/23840532http://purl.uniprot.org/core/volume"8"xsd:string
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