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- W2042861570 abstract "We have investigated the effects of bFGF on both the FSH-induced LH receptor expression and cAMP production in cultured rat granulosa cells. Concentrations of pure FGF, from 10(-12) M to 10(-10) M, progressively inhibit the stimulatory actions of FSH with an ED50 of approximately 4 x 10(-12) M for both parameters. Higher FGF concentrations, from 4 x 10(-10) M to 10(-8) M, lead to a gradual reduction of the growth factor inhibitory effect. The effects of FGF are more prominent on the modulation of LH receptors than on the FSH-induced cAMP production. Moreover, FGF impairs the LH receptor formation induced by cholera toxin or 8-Bromo-cAMP, indicating that the growth factor also acts at a step distal to cAMP formation. The inhibitory effect of FGF on LH receptor expression increases during the entire course of granulosa cell differentiation, from 24 to 96 h, and is not due to variations in cell number or viability, but rather to a change in the content of LH receptors with no significant modification of binding affinity (KD congruent to 0.8 x 10(-10) M). These results suggest that bFGF may acutely regulate the capacity of granulosa cells to differentiate upon FSH stimulation and to respond to LH during the ovarian follicular maturation." @default.
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- W2042861570 date "1988-10-01" @default.
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- W2042861570 title "Fibroblast growth factor regulates the expression of luteinizing hormone receptors in cultured rat granulosa cells" @default.
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- W2042861570 doi "https://doi.org/10.1016/s0006-291x(88)80890-8" @default.
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