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Steroid receptor mRNA levels in human corpus luteum
R Misao1, Y Nakanishi, J Fujimoto
1Department of Obstetrics and Gynecology, Gifu University School of Medicine, Gifu, Japan.
Hormone Research
|October 8, 1998
Summary
Sex steroid receptors in the human corpus luteum decrease in the late secretory phase. This suggests local sex steroids regulate corpus luteum function and lifespan.
Area of Science:
- Reproductive Endocrinology
- Molecular Biology
- Human Physiology
Background:
- The human corpus luteum plays a crucial role in early pregnancy.
- Sex steroids are known to influence reproductive processes.
- The specific role of sex steroid receptors within the corpus luteum requires further elucidation.
Purpose of the Study:
- To investigate the expression of estrogen receptor alpha (ERα), progesterone receptor (PR), and androgen receptor (AR) mRNA in the human corpus luteum.
- To determine how these receptor mRNA levels change during different phases of the luteal cycle.
- To understand the local biological role of sex steroids in corpus luteum function.
Main Methods:
- Semiquantitative reverse-transcription polymerase chain reaction-Southern blot analysis was employed.
- Human corpus luteum samples from different phases of the secretory cycle were analyzed.
- Expression levels of ERα, PR, and AR mRNA were quantified.
Main Results:
- Expression of ERα, PR, and AR mRNA was detected in all analyzed human corpus luteum samples.
- Significantly lower levels of all three steroid receptor mRNAs were observed during the late secretory phase compared to the early and mid-secretory phases (p < 0.05).
Conclusions:
- The human corpus luteum expresses estrogen, progesterone, and androgen receptors.
- Steroid receptor mRNA levels exhibit dynamic changes throughout the luteal phase, decreasing in the late secretory phase.
- These findings support a localized regulatory role for sex steroids in modulating human corpus luteum function and lifespan.