Growth differential factor-9 inhibits testosterone production in mouse theca interstitial cells
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Ming-hui Chen1, Tao Li, Chen-hui Ding
1Reproductive Medicine Center, the First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, People's Republic of China.
Objective:
To explore the effect of growth differential factor-9 (GDF-9) alone on cell proliferation, cell viability, steroidogenesis, and hormone-stimulated gene expression in cultured mouse theca interstitial cells.
Design:
Basic research.
Setting:
University hospital.
Animal(S):
Immature 3- to 4-week-old SPF KM mice obtained from the Laboratory Animal Center of Sun Yat-Sen University.
Intervention(S):
Addition of GDF-9 at different dosages to primary culture of mouse theca interstitial cells.
Main Outcome Measure(S):
Cell number, cell viability, progesterone and testosterone levels, and hormone-stimulated gene mRNA abundance.
Result(S):
Growth differential factor-9 mildly increased the number of mouse theca interstitial cells and cell viability in a dose-dependent manner and mildly inhibited the production of progesterone in mouse theca interstitial cells. Administration of GDF-9 at the dosages of 200 ng/mL and 400 ng/mL resulted in a significant decrease in the testosterone level compared with the control group by 60.42% and 68.76%, respectively. Growth differential factor-9 significantly suppressed Lhcgr mRNA by 47.36%, Cyp11a1 mRNA by 62.30%, and Cyp17a1 mRNA by 55.39%, but had only a mild effect on Star gene expression.
Conclusion(S):
Growth differential factor-9 can inhibit the production of testosterone in mouse theca interstitial cells and suppress the corresponding gene expression.
Insights
Growth differential factor-9 (GDF-9) was studied in mouse theca interstitial cells. GDF-9 inhibited testosterone production and suppressed related gene expression, impacting cell proliferation and viability.
Area of Science:
- Reproductive biology
- Endocrinology
- Cell biology
Background:
- Theca interstitial cells are crucial for ovarian function and steroidogenesis.
- Growth differentiation factor-9 (GDF-9) is a key signaling molecule in ovarian physiology.
- Understanding GDF-9's specific role in theca cells is essential for reproductive research.
Purpose of the Study:
- To investigate the isolated effects of GDF-9 on mouse theca interstitial cells.
- To assess GDF-9's impact on cell proliferation, viability, steroidogenesis, and gene expression.
Main Methods:
- Primary cultures of mouse theca interstitial cells were established.
- Cells were treated with varying dosages of GDF-9.
- Measurements included cell number, viability, progesterone and testosterone levels, and specific gene mRNA abundance.
Main Results:
- GDF-9 demonstrated a dose-dependent, mild increase in cell number and viability.
- GDF-9 significantly reduced testosterone production and suppressed mRNA expression of Lhcgr, Cyp11a1, and Cyp17a1.
- Progesterone production was mildly inhibited by GDF-9, with a minimal effect on Star gene expression.
Conclusions:
- GDF-9 inhibits testosterone production in mouse theca interstitial cells.
- GDF-9 suppresses the expression of key genes involved in steroidogenesis.
- These findings highlight GDF-9's regulatory role in ovarian theca cell function.
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