Selenium supplementation induces mitochondrial biogenesis in trophoblasts

Area of Science:

• Reproductive biology
• Mitochondrial medicine
• Nutritional science

Background:

• Placental oxidative stress is linked to pregnancy complications.
• Selenium protects trophoblast mitochondria from oxidative damage.
• This study investigates selenium's impact on trophoblast mitochondrial health.

Purpose of the Study:

• To examine the effect of selenium supplementation on mitochondrial function and content in trophoblasts.
• To assess selenium's role in mitochondrial biogenesis within placental cells.

Main Methods:

• Swan-71, JEG-3, and BeWo cells, along with placental tissue, were treated with sodium selenite or selenomethionine.
• Mitochondrial function was assessed using respirometry.
• Mitochondrial content and biogenesis markers (selenoprotein H, PGC-1α, NRF-1) were analyzed via RT-PCR and western blotting.

Main Results:

• Selenium supplementation significantly improved mitochondrial respiration in both cells and tissues.
• Increased mitochondrial content was observed following selenium supplementation.
• Selenium up-regulated key mitochondrial biogenesis mediators in trophoblast cells.

Conclusions:

• Selenium plays a crucial role in the regeneration of mitochondria within trophoblasts.
• These findings underscore the importance of selenium for maintaining placental mitochondrial health.