Stress-dependent cardiac remodeling occurs in the absence of microRNA-21 in mice

David M. Patrick, Rusty L. Montgomery, Xiaoxia Qi, Susanna Obad, Sakari Kauppinen, Joseph A Hill, Eva Van Rooij, Eric N Olson

Research output: Contribution to journalArticlepeer-review

315 Scopus citations


MicroRNAs inhibit mRNA translation or promote mRNA degradation by binding complementary sequences in 3′ untranslated regions of target mRNAs. MicroRNA-21 (miR-21) is upregulated in response to cardiac stress, and its inhibition by a cholesterol-modified antagomir has been reported to prevent cardiac hypertrophy and fibrosis in rodents in response to pressure overload. In contrast, we have shown here that miR-21-null mice are normal and, in response to a variety of cardiac stresses, display cardiac hypertrophy, fibrosis, upregulation of stress-responsive cardiac genes, and loss of cardiac contractility comparable to wildtype littermates. Similarly, inhibition of miR-21 through intravenous delivery of a locked nucleic acid-modified (LNA-modified) antimiR oligonucleotide also failed to block the remodeling response of the heart to stress. We therefore conclude that miR-21 is not essential for pathological cardiac remodeling.

Original languageEnglish (US)
Pages (from-to)3912-3916
Number of pages5
JournalJournal of Clinical Investigation
Issue number11
StatePublished - Nov 1 2010

ASJC Scopus subject areas

  • Medicine(all)


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