LH promotes testosterone synthesis in rooster leydig cells through YAP1/ACSL4/SOAT1 pathway

Area of Science:

• Endocrinology
• Molecular Biology
• Lipid Metabolism

Background:

• Testosterone synthesis in Leydig cells is crucial for male reproduction.
• Regulation of testosterone production by luteinizing hormone (LH) and cholesterol metabolism is complex and not fully understood.

Purpose of the Study:

• To elucidate the molecular mechanisms linking LH signaling to testosterone production.
• To identify novel regulators of cholesterol metabolism in Leydig cells involved in steroidogenesis.

Main Methods:

• Transcriptomic profiling of Leydig cells.
• Functional studies involving gene inhibition (YAP1, ACSL4) and expression analysis.
• Analysis of cholesterol esterification and free cholesterol levels.

Main Results:

• A novel YAP1-ACSL4 axis was identified as essential for LH-induced testosterone production.
• LH upregulates YAP1, which increases ACSL4 expression.
• ACSL4, via SOAT1 suppression, enhances free cholesterol availability for testosterone synthesis.

Conclusions:

• The YAP1-ACSL4 axis is a key regulator of cholesterol metabolism and testosterone synthesis in Leydig cells.
• This pathway links gonadotropin signaling to steroidogenesis through modulation of lipid metabolism.