Nuclear hormone receptors for heme:: REV-ERBα and REV-ERBβ are ligand-regulated components of the mammalian clock

被引:125
作者
Burris, Thomas P. [1 ]
机构
[1] Louisiana State Univ Syst, Pennington Biomed Res Ctr, Nucl Receptor Biol Lab, Baton Rouge, LA 70808 USA
关键词
D O I
10.1210/me.2007-0519
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
The nuclear hormone receptors (NHRs), REV-ERB alpha and REV-ERB beta, regulate a number of physiological functions including the circadian rhythm, lipid metabolism, and cellular differentiation. These two receptors lack the activation function-2 region that is associated with the ability of NHRs to recruit coactivators and activate target gene transcription. These NHRs have been characterized as constitutive repressors of transcription due to their lack of an identified ligand and their strong ability to recruit the corepressor, nuclear receptor corepressor. Recently, the porphyrin heme was demonstrated to function as a ligand for both REV-ERBs. Heme binds directly to the ligand-binding domain and regulates the ability of these NHRs to recruit nuclear receptor corepressor to target gene promoters. This review focuses on the physiological roles that these two receptors play and the implications of heme functioning as their ligand. The prospect that these NHRs, now known to be regulated by small molecule ligands, may be targets for development of drugs for treatment of diseases associated with aberrant circadian rhythms including metabolic and psychiatric disorders as well as cancer is also addressed.
引用
收藏
页码:1509 / 1520
页数:12
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