Words similar to gonadotropin
Example sentences for: gonadotropin
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Chloride channels or chloride ions are known to influence cAMP-stimulated steroidogenesis by adrenal cells [ 29 ] , human chorionic gonadotropin (hCG)-stimulated steroidogenesis by amphibian follicle-enclosed oocytes [ 56 ] , as well as LH-stimulated steroidogenesis in rat Leydig cells [ 29 ] , MA-10 cells [ 59 ] , and chicken GC [ 35 ] . In mammalian cells, removal of extracellular chloride stimulates basal and protein kinase A (PKA)-dependent steroid hormone production by increasing the expression of StAR and potentiating the effects of submaximal concentrations of cAMP [ 29 59 ] . The proposed mechanism of action involves chloride efflux, depolarization of the mitochondrial and plasma membranes, and alterations to protein synthesis and cholesterol transport [ 29 59 ] .
The pig granulosa cell line PGC-2 was obtained from Bruce Downey (McGill University) and maintained in culture in McCoy's modified 5A medium supplemented with 10% FBS, as described previously in detail [ 19 ] . PGC-2 cells have been well-characterized with respect to steroidogenic capability, cAMP response, and gonadotropin insensitivity [ 19 ] . Here, PGC-2 were seeded at a density of approximately 5 × 10 5cells/ml of serum-containing medium in 24-well tissue culture plates.
The present study was initiated to test this hypothesis in vivo by examining neuronal migration of chick gonadotropin releasing hormone (GnRH) neurons during embryogenesis.
They were co-expressed with the luteinizing hormone (LH) receptor in HEK 293 cells and cAMP accumulation was measured in both the presence and absence of the LH receptor agonist, human chorionic gonadotropin (hCG).
[ 3H]-adenine-labeled cells were assayed for cAMP accumulation after incubation at 37°C for 40 min. in the presence of 1 mM 3-isobutyl-1-methylxanthine (IBMX) a phosphodiesterase inhibitor, and in the presence or absence of 7.5 ng/mL human chorionic gonadotropin (hCG), as described previously.
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