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Rapid action of estradiol in primate GnRH neurons: the role of estrogen receptor alpha and estrogen receptor beta.


ABSTRACT: Estrogens play a pivotal role in the control of female reproductive function. Recent studies using primate GnRH neurons derived from embryonic nasal placode indicate that 17?-estradiol (E(2)) causes a rapid stimulatory action. E(2) (1nM) stimulates firing activity and intracellular calcium ([Ca(2+)](i)) oscillations of primate GnRH neurons within a few min. E(2) also stimulates GnRH release within 10min. However, the classical estrogen receptors, ER? and ER?, do not appear to play a role in E(2)-induced [Ca(2+)](i) oscillations or GnRH release, as the estrogen receptor antagonist, ICI 182,780, failed to block these responses. Rather, this rapid E(2) action is, at least in part, mediated by a G-protein coupled receptor GPR30. In the present study we further investigate the role of ER? and ER? in the rapid action of E(2) by knocking down cellular ER? and ER? by transfection of GnRH neurons with specific siRNA for rhesus monkey ER? and ER?. Results indicate that cellular knockdown of ER? and ER? failed to block the E(2)-induced changes in [Ca(2+)](i) oscillations. It is concluded that neither ER? nor ER? is required for the rapid action of E(2) in primate GnRH neurons.

SUBMITTER: Kenealy BP 

PROVIDER: S-EPMC3183999 | biostudies-literature | 2011 Aug

REPOSITORIES: biostudies-literature

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Rapid action of estradiol in primate GnRH neurons: the role of estrogen receptor alpha and estrogen receptor beta.

Kenealy B P BP   Keen K L KL   Terasawa E E  

Steroids 20110225 9


Estrogens play a pivotal role in the control of female reproductive function. Recent studies using primate GnRH neurons derived from embryonic nasal placode indicate that 17β-estradiol (E(2)) causes a rapid stimulatory action. E(2) (1nM) stimulates firing activity and intracellular calcium ([Ca(2+)](i)) oscillations of primate GnRH neurons within a few min. E(2) also stimulates GnRH release within 10min. However, the classical estrogen receptors, ERα and ERβ, do not appear to play a role in E(2)  ...[more]

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