Characterization of a novel non-steroidal glucocorticoid receptor antagonist.
Selective antagonists of the glucocorticoid receptor (GR) are desirable for the treatment of hypercortisolemia associated with Cushing's syndrome, psychic depression, obesity, diabetes, neurodegenerative diseases, and glaucoma. NC3327, a non-steroidal small molecule with potent binding affinity to GR (K(i)=13.2nM), was identified in a high-throughput screening effort. As a full GR antagonist, NC3327 greatly inhibits the dexamethasone (Dex) induction of marker genes involved in hepatic gluconeogenesis, but has a minimal effect on matrix metalloproteinase 9 (MMP-9), a GR responsive pro-inflammatory gene. Interestingly, the compound recruits neither coactivators nor corepressors to the GR complex but competes with glucocorticoids for the interaction between GR and a coactivator peptide. Moreover, NC3327 does not trigger GR nuclear translocation, but significantly blocks Dex-induced GR transportation to the nucleus, and thus appears to be a 'competitive' GR antagonist. Therefore, the non-steroidal compound, NC3327, may represent a new class of GR antagonists as potential therapeutics for a variety of cortisol-related endocrine disorders.
Li
Qun-Yi
QY
The National Center for Drug Screening, Shanghai, China.
Zhang
Meng
M
Hallis
Tina M
TM
Derosier
Therese A
TA
Yue
Jian-Min
JM
Ye
Yang
Y
Mais
Dale E
DE
Wang
Ming-Wei
MW
D021581:Active Transport, Cell Nucleus / Q000187:drug effects; D002460:Cell Line; D002467:Cell Nucleus / Q000378:metabolism; D003907:Dexamethasone / Q000037:antagonists & inhibitors / Q000494:pharmacology; D015870:Gene Expression / Q000187:drug effects; D005943:Gluconeogenesis / Q000187:drug effects* / Q000235:genetics; D006801:Humans; D007211:Indoles / Q000737:chemistry / Q000494:pharmacology*; D008099:Liver / Q000187:drug effects* / Q000378:metabolism; D020780:Matrix Metalloproteinase 9 / Q000378:metabolism; D011965:Receptors, Glucocorticoid / Q000037:antagonists & inhibitors* / Q000378:metabolism; D014966:Xanthenes / Q000737:chemistry / Q000494:pharmacology*
C547208:9-(2-methylindol-3-yl)-4a-morpholino-7-nitro-1,2,3,4,4a,9a-hexahydroxanthene; D007211:Indoles; D011965:Receptors, Glucocorticoid; D014966:Xanthenes; D003907:Dexamethasone; D020780:Matrix Metalloproteinase 9