Stimulation of Progesterone Synthesis in Luteinized Human Granulosa Cells by Human Chorionic Gonadotropin and 8-Bromo-Adenosine 3′;,5′- Monophosphate: TheEffect of Low Density Lipoprotein*

1984 ◽  
Vol 58 (5) ◽  
pp. 831-837 ◽  
Author(s):  
EMILIANO SOTO ◽  
SUSAN L. SILAVIN ◽  
RICHARD W. TURECK ◽  
JEROME F. STRAUSS
Keyword(s):  
Chorionic Gonadotropin ◽  
Granulosa Cells ◽  
Human Chorionic Gonadotropin ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Low Density ◽  
Human Granulosa Cells ◽  
Progesterone Synthesis ◽  
Stimulation Of

Prolactin, LH, and estradiol-17β in utilization of lipoprotein substrate by porcine granulosa cells in vitro

1988 ◽  
Vol 66 (5) ◽  
pp. 561-566 ◽  
Author(s):  
K. Rajkumar ◽  
P. Klingshorn ◽  
P. J. Chedrese ◽  
B. D. Murphy
Keyword(s):  
Granulosa Cell ◽  
Cell Cultures ◽  
Granulosa Cells ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Low Density ◽  
Porcine Granulosa Cells ◽  
Progesterone Synthesis ◽  
Serum Free Conditions

Porcine granulosa cells cultured under serum free conditions responded by increased progesterone secretion to the addition of the leuteotropic hormones, LH, prolactin, and estradiol. Provision of extracellular substrate for steroidogenesis in the form of porcine high density lipoprotein or low density lipoprotein enhanced progesterone accumulation by granulosa cell cultures. Estradiol, LH, and prolactin all greatly increased progesterone accumulation in the presence of either high or low density lipoproteins. Increases in progesterone accumulation following addition of prolactin or LH in combination with estradiol suggested the presence of a synergistic interaction among leuteotropins. Pre-exposure of granulosa cell cultures to estradiol increased the subsequent stimulatory effect of prolactin on lipoprotein utilization. It is concluded that all three leuteotropins function to enhance and may interact in the utilization of extracellular lipoprotein substrate for progesterone synthesis.

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