Angiotensin II type 1 receptor signalling regulates microRNA differentially in cardiac fibroblasts and myocytes

Research output: Contribution to journalJournal articleResearchpeer-review

  • Jeppesen, Pia
  • Gitte Lund Christensen
  • Mikael Schneider
  • Nossent, Anne Yaël
  • Hasse Brønnum Jensen
  • Ditte Caroline Andersen
  • Tilde Eskildsen
  • Steen Gammeltoft
  • Jakob Lerche Hansen
  • Søren Paludan Sheikh
Background and purpose: The Angiotensin II type 1 receptor (AT(1) R) is a key regulator of blood pressure and cardiac contractility and is profoundly involved in development of cardiac disease. Since several microRNAs (miRNAs) have been implicated in cardiac disease, we asked whether miRNAs might be regulated by AT(1) R signals in a Gaq/11 dependent or -independent manner. Experimental approach: We performed a global miRNA array analysis of angiotensin II (Ang II) mediated miRNA regulation in HEK293N cells over-expressing the AT(1) R and focused on separating the role of Gaq/11 -dependent and -independent pathways. MiRNA regulation was verified with quantitative PCR in both HEK293N cells and primary cardiac myocytes and fibroblasts. Key results: Our studies revealed five miRNAs (miR-29b, -129-3p, -132, -132* and -212) that were upregulated by Ang II in HEK293N cells. In contrast, the biased Ang II analogue, [Sar1, Ile4, Ile8] Ang II (SII Ang II), which selectively activates Gaq/11-independent signalling, failed to regulate miRNAs in HEK293N cells Furthermore, Ang II induced miRNA regulation was blocked following Gaq/11 and Mek1 inhibition. The observed Ang II regulation of miRNA was confirmed in primary cultures of adult cardiac fibroblasts. Interestingly, Ang II did not regulate miRNA expression in cardiac myocytes, but SII Ang II significantly downregulated miR-129-3p. Conclusions and implications: Five miRNAs were regulated by Ang II through mechanisms depending on Gaq/11 and Erk1/2 activation. The reported miRNAs may be involved in Ang II-mediated cardiac biology and disease, as several of these miRNAs have previously been related to cardiovascular disease and were found to be regulated in cardiac cells.
Original languageEnglish
JournalBritish Journal of Pharmacology
Volume164
Issue number2
Pages (from-to)394-404
Number of pages11
ISSN0007-1188
DOIs
Publication statusPublished - Sep 2011

    Research areas

  • Angiotensin II, Anthracenes, Butadienes, Extracellular Signal-Regulated MAP Kinases, Fibroblasts, GTP-Binding Protein alpha Subunits, Gq-G11, Gene Expression Profiling, Gene Expression Regulation, HEK293 Cells, Humans, Imidazoles, MicroRNAs, Myocytes, Cardiac, Nitriles, Pyridines, Receptor, Angiotensin, Type 1, Signal Transduction

ID: 34167872