Abstract:
:TRα1 (thyroid hormone receptor α1) is well recognized for its importance in brain development. However, due to the difficulties in predicting TREs (thyroid hormone response elements) in silico and the lack of suitable antibodies against TRα1 for ChIP (chromatin immunoprecipitation), only a few direct TRα1 target genes have been identified in the brain. Here we demonstrate that mice expressing a TRα1-GFP (green fluorescent protein) fusion protein from the endogenous TRα locus provide a valuable animal model to identify TRα1 target genes. To this end, we analysed DNA-TRα1 interactions in vivo using ChIP with an anti-GFP antibody. We validated our system using established TREs from neurogranin and hairless, and by verifying additional TREs from known TRα1 target genes in brain and heart. Moreover, our model system enabled the identification of novel TRα1 target genes such as RNF166 (ring finger protein 166). Our results demonstrate that transgenic mice expressing a tagged nuclear receptor constitute a feasible approach to study receptor-DNA interactions in vivo, circumventing the need for specific antibodies. Models like the TRα1-GFP mice may thus pave the way for genome-wide mapping of nuclear receptor-binding sites, and advance the identification of novel target genes in vivo.
journal_name
Biosci Repjournal_title
Bioscience reportsauthors
Dudazy-Gralla S,Nordström K,Hofmann PJ,Meseh DA,Schomburg L,Vennström B,Mittag Jdoi
10.1042/BSR20120124subject
Has Abstractpub_date
2013-03-13 00:00:00pages
e00027issue
2eissn
0144-8463issn
1573-4935pii
BSR20120124journal_volume
33pub_type
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