TY - JOUR
T1 - Gonadotropin and steroid regulation of steroid receptor and aryl hydrocarbon receptor messenger ribonucleic acid in macaque granulosa cells during the periovulatory interval
AU - Chaffin, C. L.
AU - Stouffer, R. L.
AU - Duffy, D. M.
PY - 1999
Y1 - 1999
N2 - Although steroids play a local role(s) in ovulation and luteinization of the primate follicle, the dynamics of steroid receptor expression during the 36- to 38-h periovulatory interval has yet to be elucidated. The present study examines the regulation of messenger RNAs (mRNAs) for progesterone (PR), androgen (AR), and estrogen (ERα, ERβ) receptors as well as the aryl hydrocarbon receptor (AhR) in macaque granulosa cells during controlled ovarian stimulation cycles before (0 h) and after (up to 36 h) administration of the ovulatory hCG bolus with or without steroid depletion and progestin replacement. All steroid receptor mRNAs were detected in granulosa cells before the ovulatory stimulus, as determined by RT-PCR. PR mRNA increased (P < 0.05) by 12 h after hCG; 24 and 36 h after hCG, levels were intermediate between 0-12 h. PR mRNA was reduced by steroid depletion throughout the periovulatory interval (P < 0.05); however, progestin replacement returned PR mRNA to control levels at 12 h. AR mRNA increased (P < 0.05) at 24 h post-hCG and remained at this level 36 h after hCG; steroid depletion did not alter AR mRNA levels. ERα mRNA did not change, whereas ERβ decreased 12-36 h after the ovulatory stimulus (P < 0.05). Steroid depletion reduced ERα mRNA 12 h after hCG, an effect partially reversible by progestin replacement, whereas ERβ mRNA was not affected by steroids. AhR mRNA was undetectable before the administration of hCG, but increased by 12 h (P < 0.05). These data demonstrate hCG-initiated, steroid-dependent (PR, ERα) and -independent (AR, ERβ, AhR) expression of receptor mRNAs in primate granulosa cells during the periovulatory interval. Differences in patterns of expression may relate to diverse roles for steroid hormones and AhR ligands in periovulatory events.
AB - Although steroids play a local role(s) in ovulation and luteinization of the primate follicle, the dynamics of steroid receptor expression during the 36- to 38-h periovulatory interval has yet to be elucidated. The present study examines the regulation of messenger RNAs (mRNAs) for progesterone (PR), androgen (AR), and estrogen (ERα, ERβ) receptors as well as the aryl hydrocarbon receptor (AhR) in macaque granulosa cells during controlled ovarian stimulation cycles before (0 h) and after (up to 36 h) administration of the ovulatory hCG bolus with or without steroid depletion and progestin replacement. All steroid receptor mRNAs were detected in granulosa cells before the ovulatory stimulus, as determined by RT-PCR. PR mRNA increased (P < 0.05) by 12 h after hCG; 24 and 36 h after hCG, levels were intermediate between 0-12 h. PR mRNA was reduced by steroid depletion throughout the periovulatory interval (P < 0.05); however, progestin replacement returned PR mRNA to control levels at 12 h. AR mRNA increased (P < 0.05) at 24 h post-hCG and remained at this level 36 h after hCG; steroid depletion did not alter AR mRNA levels. ERα mRNA did not change, whereas ERβ decreased 12-36 h after the ovulatory stimulus (P < 0.05). Steroid depletion reduced ERα mRNA 12 h after hCG, an effect partially reversible by progestin replacement, whereas ERβ mRNA was not affected by steroids. AhR mRNA was undetectable before the administration of hCG, but increased by 12 h (P < 0.05). These data demonstrate hCG-initiated, steroid-dependent (PR, ERα) and -independent (AR, ERβ, AhR) expression of receptor mRNAs in primate granulosa cells during the periovulatory interval. Differences in patterns of expression may relate to diverse roles for steroid hormones and AhR ligands in periovulatory events.
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U2 - 10.1210/endo.140.10.7056
DO - 10.1210/endo.140.10.7056
M3 - Article
C2 - 10499535
AN - SCOPUS:0033305190
SN - 0013-7227
VL - 140
SP - 4753
EP - 4760
JO - Endocrinology
JF - Endocrinology
IS - 10
ER -