Words similar to gnrh-stimulated
Example sentences for: gnrh-stimulated
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The profound inhibition of GnRH-stimulated LH secretion observed in Fig.
Previously, we showed that RSG3 was expressed endogenously in rat pituitary cells and, when experimentally co-expressed together with GnRH receptors in a heterologous cell line (COS1), it suppressed GnRH-stimulated inositol trisphosphate production [ 9 ] . Here, those studies have been extended to include GnRH-stimulated LH secretion using adenovirus-mediated gene transfer of RGS3 complementary DNA into normal rat pituitary gonadotropes.
Another experiment conducted to test the specificity and molecular locus of RGS3 action in inhibiting GnRH-stimulated LH secretion was treatment of adeno-RGS3 infected cells with an agent that increases intracellular calcium (Fig.
Because of the evidence that the signal transduction pathway for GnRH in gonadotropes involves the GnRH receptor, Gqα, phospholipase Cβ, and cellular IP 3 release [ 39 40 ] , we determined the effect of RGS3 on GnRH-stimulated LH secretion using adenoviral-mediated gene transfer in rat pituitary cells (Fig.
Two molecular loci recently have been implicated as potential modulators of GnRH receptor signaling: one is the receptor itself [ 23 ] , and the other is the G protein that transduces the signal generated by binding of the receptor to its agonist [ 9 ] . With respect to the former locus, G protein coupled receptor kinases (GRKs) act in an agonist-specific manner to phosphorylate intracellular regions of the receptor thus permitting β arrestin binding that sterically inhibits G protein association with the receptor [ 1 45 ] . We have reported previously that experimental expression of GRKs in GnRH receptor-expressing heterologous cells (COS-1) suppressed GnRH-stimulated IP 3 production, and that co-expression of GRK2 and β-arrestin 2 suppressed GnRH receptor signaling more than that of either alone [ 23 ] . Stronger evidence that the GRK/β arrestin paradigm may play a role in regulating GnRH receptor signaling is our recent finding that adenovirus-mediated gene transfer of GRK2 into normal pituitary gonadotropes suppressed GnRH-stimulated LH secretion and IP 3 production [ 31 ] . However, no evidence has been presented for a direct interaction between β-arrestin and the GnRH receptor.
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