scholarly journals Comparison of the Inhibitory Effect of Gonadotropin Releasing Hormone (GnRH) Agonist, Selective Estrogen Receptor Modulator (SERM), Antiprogesterone on Myoma Cell Proliferation In Vitro

2014 ◽  
Vol 11 (3) ◽  
pp. 276-281 ◽  
Author(s):  
Youn-Jee Chung ◽  
Boah Chae ◽  
Se-Hyun Kwak ◽  
Jae-Yen Song ◽  
Ah-Won Lee ◽  
...  
Keyword(s):  
Cell Proliferation ◽  
Estrogen Receptor ◽  
Gnrh Agonist ◽  
Inhibitory Effect ◽  
Selective Estrogen Receptor Modulator ◽  
Gonadotropin Releasing Hormone ◽  
Releasing Hormone ◽  
Receptor Modulator ◽  
Proliferation In Vitro

BE360, a new selective estrogen receptor modulator, produces antidepressant and antidementia effects through the enhancement of hippocampal cell proliferation in olfactory bulbectomized mice

2016 ◽  
Vol 297 ◽  
pp. 315-322 ◽  
Author(s):  
Osamu Nakagawasai ◽  
Wataru Nemoto ◽  
Hiroshi Onogi ◽  
Takahiro Moriya ◽  
Jia-Rong Lin ◽  
...  
Keyword(s):  
Cell Proliferation ◽  
Estrogen Receptor ◽  
Selective Estrogen Receptor Modulator ◽  
Receptor Modulator ◽  
Hippocampal Cell

Effect of chronic exposure to a gonadotrophin-releasing hormone agonist on in vitro responsiveness of ovine pituitary cells to inhibin, activin and oestradiol

1994 ◽  
Vol 140 (3) ◽  
pp. 483-493 ◽  
Author(s):  
S Muttukrishna ◽  
P G Knight
Keyword(s):  
Gnrh Agonist ◽  
Inhibitory Effect ◽  
Pituitary Cells ◽  
Cell Content ◽  
Releasing Hormone ◽  
Basal Release ◽  
Lh Release ◽  
Gonadotrophin Releasing Hormone

Abstract To investigate the extent to which the direct actions of inhibin, activin and oestradiol on pituitary output of FSH and LH are dependent on the presence of functional gonadotrophin-releasing hormone (GnRH) receptors, we have compared the effects of these agents on cultured ovine pituitary cells derived from control and GnRH agonist-suppressed ewes. Chronic treatment with GnRH agonist reduced plasma LH and FSH levels (P<0·01) and abolished GnRH-induced release of LH and FSH both in vivo and in vitro. As expected, basal LH release and LH cell content in vitro were drastically reduced in GnRH agonist-suppressed cells (P<0·001). However, basal FSH release and FSH cell content were approximately twofold higher than in control cells (P<0·001). Irrespective of whether the cells had been desensitized to GnRH, inhibin and oestradiol were both found to suppress basal FSH release and FSH cell content in a dose-dependent fashion (P<0·001). Although inhibin had no effect on basal release of LH from control cells, it markedly enhanced GnRH-induced release (P<0·001). In contrast, inhibin increased (P<0·001) basal LH release from GnRH agonist-suppressed cells (which were unresponsive to the GnRH challenge). Inhibin had no overall effect on total LH content/well for either control or GnRH agonist-suppressed cells. Treatment with oestradiol, on the other hand, reduced total LH content/well, an effect which was more pronounced with GnRH agonist-suppressed cells (−44%; P<0·001) than with control cells (−14%, P<0·01). Whereas in control cells activin had no significant effect on any aspect of FSH production examined, in GnRH agonist-treated cells activin enhanced basal FSH release, residual cell content and total FSH content/well (P<0·001). Altering GnRH receptor status also modified the LH response to activin. With control cells activin increased basal release (P<0·001), decreased GnRH-induced release (P<0·001) and increased total LH content/well (P<0·001). With GnRH agonist-treated cells, however, activin had a uniform inhibitory effect on each aspect of LH production examined (P<0·001 in each case). It was concluded that desensitization of ovine gonadotrophs to GnRH by chronic agonist treatment results in a paradoxical enhancement of FSH output in vitro but has little effect on the responsiveness of the cells (in terms of gonadotrophin release and content) to either inhibin or oestradiol. In contrast, GnRH agonist treatment leads to qualitative changes in cellular reponsiveness to activin. Journal of Endocrinology (1994) 140, 483–493

The selective estrogen receptor modulator raloxifene regulates osteoclast and osteoblast activity in vitro

Bone ◽  
2002 ◽  
Vol 30 (2) ◽  
pp. 368-376 ◽  
Author(s):  
A Taranta ◽  
M Brama ◽  
A Teti ◽  
V De luca ◽  
R Scandurra ◽  
...  
Keyword(s):  
Estrogen Receptor ◽  
Selective Estrogen Receptor Modulator ◽  
Receptor Modulator ◽  
Osteoblast Activity
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