Optimized culture system to maximize ovarian cell growth and functionality in vitro

Area of Science:

• Reproductive Biology
• Cell Culture Technology
• Endocrinology

Background:

• Ovarian cells are vital for female hormone production and reproductive health.
• Maintaining ovarian cell phenotype and function during in vitro culture is challenging.
• In vitro follicle engineering requires robust ovarian cell culture systems.

Purpose of the Study:

• To develop an optimized culture system for maintaining ovarian cell growth and functionality.
• To identify key factors that promote proliferation and hormone secretion in granulosa cells (GCs) and theca cells (TCs).
• To establish a reliable method for long-term culture of functionally differentiated ovarian cells.

Main Methods:

• Granulosa cells (GCs) and theca cells (TCs) were isolated from female rats.
• Cells were cultured in media supplemented with various hormones (FSH, LH), serum concentrations, and growth factors (GDF9, BMP15, BMP7, bFGF).
• Proliferation rates and hormone secretion (estradiol, androstenedione) were measured over a 40-day culture period.

Main Results:

• Follicle-stimulating hormone (FSH) and luteinizing hormone (LH) significantly enhanced estradiol and androstenedione secretion, respectively.
• Basic fibroblast growth factor (bFGF) showed the most significant effect on both GC and TC proliferation and GC estradiol production.
• A medium containing 5% serum, gonadotropins, and bFGF supported exponential proliferation of GCs and TCs for up to 40 days while preserving their functional characteristics.

Conclusions:

• The developed culture medium formula is optimal for maximizing the proliferation of functionally differentiated ovarian cells.
• This optimized system is essential for advancing in vitro follicle engineering and studying ovarian function.
• The findings provide a foundation for improved methods in reproductive research and assisted reproductive technologies.