Mechanical stretching increases prostaglandin E2 in cultured human amnion cells

Area of Science:

• Reproductive biology
• Cellular and Molecular Physiology

Background:

• Prostaglandin E2 (PGE2) is a key mediator in reproductive processes.
• The role of mechanical forces in regulating PGE2 synthesis in fetal membranes is not fully understood.

Purpose of the Study:

• To investigate the effect of mechanical stretching on prostaglandin E2 production in cultured human amnion cells.
• To determine if mechanical stretch influences DNA synthesis in amnion cells.

Main Methods:

• Primary human amnion cells were cultured and subjected to mechanical stretching.
• Prostaglandin E2 levels in cells and medium were quantified.
• DNA synthesis was measured using 3H-thymidine incorporation.

Main Results:

• Mechanical stretching significantly increased PGE2 synthesis and release in amnion cells (3-fold increase in cells, 9-fold in medium).
• DNA synthesis was significantly higher in stretched amnion cells compared to nonstretched controls (582 +/- 94 vs. 211 +/- 25 cpm/10(5) cells).

Conclusions:

• Mechanical stretch stimulates prostaglandin production in fetal membranes.
• This stretch-induced prostaglandin release may contribute to the initiation of labor through uterine contraction.