Characterization of Steroid Metabolic Pathways in Established Human and Mouse Cell Models

Area of Science:

• Endocrinology and Metabolism
• Cell Biology
• Biochemistry

Background:

• Immortalized cell models are crucial for studying steroid hormone production.
• Current steroid profiling often misses downstream, untargeted metabolites.
• Understanding steroidogenesis in different cell types is vital for research.

Purpose of the Study:

• To comprehensively characterize steroidogenesis in human and mouse adrenal, placental, and gonadal cell models.
• To identify and compare classical and novel steroid metabolites across diverse cell types.
• To provide detailed protocols and steroid profiles for in vitro steroidogenesis research.

Main Methods:

• Utilized liquid chromatography-mass spectrometry (LC-MS) for steroid analysis.
• Investigated steroid profiles under basal, stimulated, and serum-free conditions.
• Characterized steroidogenesis in H295R, H295A, BeWo, JEG-3, MA-10, Y-1, and OS-3 cell lines.

Main Results:

• Identified significant differences in mineralocorticoid and glucocorticoid production between human and mouse adrenal models.
• Discovered unconventional hydroxylated progesterone metabolites, most abundant in MA-10 cells.
• Observed distinct androgen profiles, including 11-oxy androgens, across models; placental models showed high pregnenolone and progesterone with limited hydroxylated metabolites.

Conclusions:

• Steroidogenic cell models exhibit unique and complex steroid production profiles.
• Novel hydroxylated progesterone metabolites were identified across multiple cell types.
• This study provides essential data and methods for future in vitro steroidogenesis research.