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A Tissue Culture Model of Estrogen-producing Primary Bovine Granulosa Cells
Published on: September 6, 2018
Insulin-like growth factor-II stimulates human granulosa-luteal cell proliferation in vitro
A M Di Blasio1, P Viganó, A Ferrari
1Department of Obstetrics and Gynecology, University of Milan, Italy.
Insights
Insulin-like growth factor-II (IGF-II) significantly boosts human granulosa cell proliferation in vitro. This finding suggests IGF-II plays a role in regulating granulosa cell function within the ovary.
Area of Science:
- Reproductive Biology
- Endocrinology
- Cell Biology
Background:
- Granulosa cells are crucial for ovarian function and follicle development.
- Intraovarian growth factors are key regulators of granulosa cell physiology.
- Insulin-like growth factor-II (IGF-II) is a potent mitogen with known roles in development.
Purpose of the Study:
- To investigate the in vitro effect of IGF-II on human granulosa cell proliferation.
- To determine if IGF-II alone or in combination with basic FGF influences granulosa cell growth.
Main Methods:
- Human granulosa cells were obtained from women undergoing IVF.
- Cells were cultured in serum-containing and serum-free media.
- Proliferation was assessed using thymidine incorporation and direct cell counting.
Main Results:
- IGF-II significantly increased thymidine incorporation in granulosa cells within 24 hours.
- Prolonged culture (7-10 days) with IGF-II confirmed enhanced cell proliferation via cell counting.
- Combination of IGF-II and basic FGF did not yield synergistic or additive proliferative effects.
Conclusions:
- IGF-II demonstrates a mitogenic effect on human granulosa cells in vitro.
- This supports a role for IGF-II as an intraovarian modulator of granulosa cell physiology.
- Findings are consistent with IGF-II's proliferative effects observed in other species.
Objective:
To determine the effect of insulin-like growth factor-II (IGF-II) on human granulosa cell proliferation in vitro.
Design:
Thymidine incorporation and cell count were determined to assess human granulosa cell proliferation.
Setting:
The study was performed in an academic research environment.
Patients:
Granulosa cells were obtained from women undergoing IVF procedures.
Interventions:
Granulosa cells were dispersed enzymatically and cultured in both serum-containing and serum-free medium.
Main Outcome Measure:
Granulosa cell proliferation in basal conditions and after stimulation with IGF-II given alone or in combination with basic fibroblast growth factor (basic FGF).
Results:
Treatment of human granulosa cells with IGF-II for 24 hours significantly increased thymidine incorporation. Furthermore, this mitogenic effect was confirmed when granulosa cells were cultured in presence of IGF-II for 7 to 10 days and their proliferation was evaluated by cell counting. The association of IGF-II and basic FGF did not result in a synergistic or additive effect.
Conclusion:
As already demonstrated in other species, IGF-II also is able to stimulate human granulosa cell proliferation in vitro. Thus, it might be considered among the intraovarian modulators of granulosa cell physiology.
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