RGD Reference Report - Aldosterone modulates steroid receptor binding to the endothelin-1 gene (edn1). - Rat Genome Database

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Aldosterone modulates steroid receptor binding to the endothelin-1 gene (edn1).

Authors: Stow, LR  Gumz, ML  Lynch, IJ  Greenlee, MM  Rudin, A  Cain, BD  Wingo, CS 
Citation: Stow LR, etal., J Biol Chem. 2009 Oct 30;284(44):30087-96. doi: 10.1074/jbc.M109.030718. Epub 2009 Jul 28.
RGD ID: 8661802
Pubmed: PMID:19638349   (View Abstract at PubMed)
PMCID: PMC2781563   (View Article at PubMed Central)
DOI: DOI:10.1074/jbc.M109.030718   (Journal Full-text)

Aldosterone and endothelin-1 (ET-1) act on collecting duct cells of the kidney and are important regulators of renal sodium transport and cardiovascular physiology. We recently identified the ET-1 gene (edn1) as a novel aldosterone-induced transcript. However, aldosterone action on edn1 has not been characterized at the present time. In this report, we show that aldosterone stimulated edn1 mRNA in acutely isolated rat inner medullary collecting duct cells ex vivo and ET-1 peptide in rat inner medulla in vivo. Aldosterone induction of edn1 mRNA occurred in cortical, outer medullary, and inner medullary collecting duct cells in vitro. Inspection of the edn1 promoter revealed two putative hormone response elements. Levels of heterogeneous nuclear RNA synthesis demonstrated that edn1 mRNA stimulation occurred at the level of transcription. RNA knockdowns corroborated pharmacological studies and demonstrated both mineralocorticoid receptor and glucocorticoid receptor participated in this response. Aldosterone resulted in dose-dependent nuclear translocation and binding of mineralocorticoid receptor and glucocorticoid receptor to the edn1 hormone response elements. Hormone receptors mediated the association of chromatin remodeling complexes, histone modification, and RNA polymerase II at the edn1 promoter. Direct interaction between aldosterone and ET-1 has important implications for renal and cardiovascular function.

Gene Ontology Annotations    Click to see Annotation Detail View

Biological Process
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
cellular response to mineralocorticoid stimulus  IEP 8661802aldosteroneRGD 

Objects Annotated

Genes (Rattus norvegicus)
Edn1  (endothelin 1)


Additional Information