Synthetic 19-nortestosterone derivatives as estrogen receptor alpha subtype-selective ligands induce similar receptor conformational changes and steroid receptor coactivator recruitment than natural estrogens.
J Steroid Biochem Mol Biol
; 99(2-3): 108-14, 2006 May.
Article
in En
| MEDLINE
| ID: mdl-16616843
ABSTRACT
The binding of estradiol (E(2)) to estrogen receptors (ER) is followed by conformational changes resulting in coactivator or corepressor recruitment that influences gene transcription. A series of synthetic A-ring reduced 19-nortestosterone-derived progestins has the capacity to selectively bind and activate transcription through the ERalpha. Herein, the molecular mechanisms involved in ER subtype-selective interactions of these compounds as assessed by their effects upon both ERalpha and ERbeta structural conformation and their ability to induce recruitment of steroid receptor coactivator-1 (SRC-1) to ERalpha were investigated. The results demonstrated that all synthetic A-ring 3beta,5alpha-tetrahydro-reduced derivatives of 19-nortestosterone induced an ERalpha trypsin digestion pattern similar to that seen with E(2), without effects upon ERbeta. In addition, these compounds had the ability to recruit SRC-1 to the ligand-binding domain of ERalpha similar to E(2). Our data indicate that A-ring 3beta,5alpha-tetrahydro-reduced 19-nortestosterone-derived progestins behave as selective ERalpha agonists with ligand-receptor structural and functional responses similar to those induced with natural E(2).
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Transcription Factors
/
Estrogen Receptor alpha
/
Estrogens
/
Nandrolone
Language:
En
Journal:
J Steroid Biochem Mol Biol
Journal subject:
BIOLOGIA MOLECULAR
/
BIOQUIMICA
Year:
2006
Document type:
Article
Affiliation country:
Mexico