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These studies were undertaken to explore the roles of both hCG and PRL in the modulation of early luteal function in the human. Human granulosa-luteal cells isolated during cycles stimulated by human menopausal gonadotropin hCG were obtained at the time of follicle aspiration and cultured to determine the effects of hCG and PRL on both progesterone and hCG receptor binding. Progesterone production by hCG-stimulated granulosa-luteal cells was increased 3.5-fold over unstimulated levels after 120 h, with maximal stimulation at hCG concentrations greater than 1 IU/ml. [125I]hCG binding to granulosa luteal cells was increased 3-fold in cells cultured with hCG (10 IU/ml) after both 48 h (P less than 0.03) and 96 h (P less than 0.02) in culture. hCG (1 IU/ml) stimulated a significant increase in progesterone production above basal levels after 72 h of culture, which continued to increase until 96 h of culture; 20 alpha-dihydroprogesterone (20 alpha-OH progesterone) production also was increased by hCG (1 IU/ml) at 72 h of culture, but unlike progesterone production, showed no further increase. In both the presence and absence of hCG, granulosa-luteal cells cultured with PRL (100 ng/ml) produced significantly more 20 alpha-OH progesterone (P less than 0.04 and P less than 0.02, respectively) after several days than cells cultured without PRL. In addition, progesterone production in the presence of hCG (10 IU/ml) decreased significantly (P less than 0.04) as 20 alpha-OH progesterone levels increased. Equivalent amounts of [125I]hCG were bound by human granulosa-luteal cells cultured with and without PRL (100 ng/ml). These results show that cultured human granulosa-luteal cells are responsive to hCG, with parallel increases in both progesterone production and [125I]hCG receptor binding. The presence of PRL (100 ng/ml) had no effect on [125I]hCG binding. In both the presence and absence of hCG, PRL resulted in an increase in 20 alpha-OH progesterone production and, in the presence of hCG (10 IU/ml), a decrease in progesterone production after several days in culture.
M L Polan, and
N Laufer, and
A M Dlugi, and
B C Tarlatzis, and
F P Haseltine, and
A H DeCherney, and
H R Behrman
June 2006,
The Journal of clinical endocrinology and metabolism,
M L Polan, and
N Laufer, and
A M Dlugi, and
B C Tarlatzis, and
F P Haseltine, and
A H DeCherney, and
H R Behrman
June 1994,
Endocrinology,
M L Polan, and
N Laufer, and
A M Dlugi, and
B C Tarlatzis, and
F P Haseltine, and
A H DeCherney, and
H R Behrman
April 2008,
Endocrinology,
M L Polan, and
N Laufer, and
A M Dlugi, and
B C Tarlatzis, and
F P Haseltine, and
A H DeCherney, and
H R Behrman
December 1980,
Biology of reproduction,
M L Polan, and
N Laufer, and
A M Dlugi, and
B C Tarlatzis, and
F P Haseltine, and
A H DeCherney, and
H R Behrman
April 1986,
The Journal of clinical endocrinology and metabolism,
M L Polan, and
N Laufer, and
A M Dlugi, and
B C Tarlatzis, and
F P Haseltine, and
A H DeCherney, and
H R Behrman
April 1984,
Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.),
M L Polan, and
N Laufer, and
A M Dlugi, and
B C Tarlatzis, and
F P Haseltine, and
A H DeCherney, and
H R Behrman
January 1974,
Current topics in experimental endocrinology,
M L Polan, and
N Laufer, and
A M Dlugi, and
B C Tarlatzis, and
F P Haseltine, and
A H DeCherney, and
H R Behrman
November 1988,
Endocrinology,
M L Polan, and
N Laufer, and
A M Dlugi, and
B C Tarlatzis, and
F P Haseltine, and
A H DeCherney, and
H R Behrman
February 1984,
American journal of obstetrics and gynecology,
M L Polan, and
N Laufer, and
A M Dlugi, and
B C Tarlatzis, and
F P Haseltine, and
A H DeCherney, and
H R Behrman
September 2003,
Fertility and sterility,
