Human glucocorticoid receptor isoform beta: recent understanding of its potential implications in physiology and pathophysiology.
Human glucocorticoid receptor isoform beta: recent understanding of its potential implications in physiology and pathophysiology.
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DOI:
10.1007/s00018-009-0098-z
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发表时间:
2009-11
影响因子:
8
通讯作者:
Chrousos, George P.
中科院分区:
文献类型:
--
作者:
Kino, Tomoshige;Su, Yan A.;Chrousos, George P.
关键词:
The human glucocorticoid receptor (GR) gene expresses two splicing isoforms α and β through alternative use of specific exons 9α and 9α. In contrast to the classic receptor GRα, which mediates most of the known actions of glucocorticoids, the functions of GRβ have been largely unexplored. Owing to newly developed methods, such as microarrays and the jellyfish fluorescence proteins, we and others have recently revealed novel functions of GRβ. Indeed, this enigmatic GR isoform influences positively and negatively the transcriptional activity of large subsets of genes, most of which are not responsive to glucocorticoids, in addition to its well-known dominant negative effect against GRα-mediated transcriptional activity. A recent report suggested that the “ligand-binding domain” of GRβ is active, forming a functional ligand-binding pocket, associated with the synthetic compound RU 486. In this review, we discuss the functions of GRβ, its mechanisms of action, and its pathologic implications.
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