Words similar to fsh
Example sentences for: fsh
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Among genes that are stimulated by FSH/cAMP during the period of maturation of Sertoli cells (15 to 20 days of age in rats), are several subunits of cAMP-dependent protein kinase (PKA), the serine/threonine kinase mainly responsible for the downstream effects of FSH [ 15 ] . Expression of the RIIβ regulatory subunit of cAMP-dependent protein kinase is highly induced (50-fold) at the mRNA level in primary cultures of rat Sertoli cells as a late response to cAMP peaking at 12 hours [ 16 ] . We have demonstrated that expression of CAAT/Enhancer binding protein β (C/EBPβ) is induced by cAMP with rapid kinetics in Sertoli cells, and that C/EBPβ is responsible for induction of late response genes like the RIIβ-gene [ 17 ] . The RIIβ promoter contains a conserved E-box/HLH element in the basal promoter localized at -280 to -275 relative to the functional ATG [ 18 ] . This element is shown to be important for cAMP-responsiveness in granulosa cells, and it has been shown to bind both USF and Myc in CHO and NB2a cells [ 18 19 ] . In this work, we show that USF isoforms may regulate cAMP responsiveness of the RIIβ promoter by modulating the effect of C/EBP, and that the formation of USF isoforms may be regulated by cAMP in Sertoli cells.
The inhibitory action of 4-AP on progesterone production was investigated further using not only primary cultures, but also the spontaneously established granulosa cell line, PGC-2 [ 19 ] . Although PGC-2 lack FSH receptors, these cells can serve as a useful in vitro model for GC function, because they produce cAMP in response to forskolin and synthesize progesterone and estradiol when supplied with appropriate substrates.
11360-070]; and 1 μg/ml FSH [NHPP, lot AFP-7028D]) and incubated at 37°C in a 5% CO 2 gaseous atmosphere.
In Siberian hamsters, SD can regulate LH secretion and behavioral responses to a female independently of changes in FSH or gross changes in testis size [ 20 ] . However, the fact that no differences in LH secretion were observed in response to SD (Fig.
Treatment with 4-AP (2 mM) decreased progesterone accumulation in the media of serum-supplemented GC cultures at 24 h and 48 h post-treatment, in the presence and absence of FSH (Figure 1).
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