Eicosapentaenoic acid (EPA) exhibits antioxidant activity via mitochondrial modulation

Area of Science:

• Biochemistry
• Cell Biology
• Nutritional Science

Background:

• Reactive oxygen species (ROS) are byproducts of mitochondrial respiration, and their accumulation is linked to oxidative damage and chronic diseases.
• Eicosapentaenoic acid (EPA), an essential unsaturated fatty acid, has various physiological functions, but its precise role in regulating cellular antioxidant capacity is not fully understood.

Purpose of the Study:

• To investigate how EPA influences cellular antioxidant capacity.
• To elucidate the underlying mechanisms by which EPA exerts its antioxidant effects.

Main Methods:

• HepG2 cells were treated with EPA for 48 hours.
• Measurements included reactive oxygen species (ROS) levels, total cellular antioxidant capacity, antioxidant enzyme activity and expression, and mitochondrial membrane potential.
• Mitochondrial biogenesis was also assessed.

Main Results:

• EPA treatment significantly reduced ROS levels by over 40%.
• Total cellular antioxidant capacity increased by 50-70% with enhanced antioxidant enzyme activity and expression.
• Mitochondrial membrane potential and biogenesis were markedly improved in EPA-treated cells.

Conclusions:

• EPA enhances cellular antioxidant capacity by improving mitochondrial function and biogenesis.
• These findings highlight EPA's potential as a dietary supplement to mitigate oxidative damage associated with chronic diseases.