Reciprocal Interactions Between Human GV-Oocytes and Cumulus Cells: Effects on GVBD, ROS Production, and AMPK...

Area of Science:

• Reproductive Biology
• Cell Biology
• Oocyte Maturation

Background:

• Cumulus cells (CCs) quality is crucial for germinal vesicle (GV) oocyte maturation.
• The reciprocal influence of GV oocytes on cumulus cell function is not well understood.

Purpose of the Study:

• To investigate the bidirectional communication between GV oocytes and CCs.
• To determine the effect of oocytes on cumulus cell function and viability.

Main Methods:

• GV oocytes were cultured with or without CCs.
• Cumulus cells were cultured alone or with oocytes.
• Assessed oocyte maturation rates (GVBD), CC morphology, growth, intracellular reactive oxygen species (ROS), and AMP-activated protein kinase (AMPK) expression.

Main Results:

• Oocyte maturation rates (GVBD) were significantly higher when co-cultured with CCs.
• CCs co-cultured with oocytes showed improved morphology, cell connections, and extracellular matrix formation.
• Co-cultured CCs had reduced ROS levels and increased AMPK expression compared to CCs cultured alone.

Conclusions:

• Cumulus cells support oocyte maturation.
• Oocytes exert a reciprocal beneficial effect on cumulus cell viability and function.
• Oocyte-cumulus cell interactions are bidirectional and crucial for reproductive success.