Identification of a novel set of genes regulated by a unique liver X receptor-alpha -mediated transcription mechanism.

Journal Article

We have reported previously that liver X receptor-alpha (LXRalpha) can mediate a novel cAMP-dependent increase in renin and c-myc gene transcription by binding as a monomer to a unique regulatory element termed the cAMP-negative response element (CNRE). To determine whether this novel action of LXRalpha has global implications on gene regulation, we employed expression profiling to identify other genes regulated by this unique mechanism. Here we report the existence of a set of known and unknown transcripts regulated in parallel with renin. Querying the Celera Mouse Genome Assembly revealed that a majority of these genes contained the consensus CNRE. We have confirmed the functionality of these CNREs by competition for LXRalpha binding via electrophoretic mobility shift assays (EMSA) and by the use of CNRE decoy molecules documenting the abolishment of the cAMP-mediated gene induction. Taken together, these results demonstrate that the interaction between cAMP-activated LXRalpha and the CNRE enhancer element is responsible for widespread changes in gene expression and identify a set of LXRalpha/cAMP-regulated genes that may have important biological implications.

Full Text

Duke Authors

Cited Authors

  • Anderson, LM; Choe, SE; Yukhananov, RY; Hopfner, RL; Church, GM; Pratt, RE; Dzau, VJ

Published Date

  • April 25, 2003

Published In

Volume / Issue

  • 278 / 17

Start / End Page

  • 15252 - 15260

PubMed ID

  • 12551904

International Standard Serial Number (ISSN)

  • 0021-9258

Digital Object Identifier (DOI)

  • 10.1074/jbc.M208644200

Language

  • eng

Conference Location

  • United States