Dietary fish oil and Undaria pinnatifida (wakame) synergistically decrease rat serum and liver triacylglycerol

Area of Science:

• Nutritional Biochemistry
• Metabolic Studies
• Marine Food Science

Background:

• Japanese diets integrate diverse ingredients like cereals, vegetables, fish, and marine algae.
• Food ingredient combinations can modulate the properties of functional substances.
• Understanding these interactions is crucial for optimizing health benefits.

Purpose of the Study:

• To investigate the combined effects of wakame (Undaria pinnatifida) and fish oil on rat lipid metabolism.
• To determine if simultaneous consumption of these typical Japanese foods yields synergistic effects on lipid regulation.

Main Methods:

• Rats were fed one of four diets for 4 weeks: control, wakame-supplemented, fish oil-supplemented, or combined wakame and fish oil.
• Serum and liver lipid concentrations were measured.
• Hepatic enzyme activities involved in fatty acid synthesis and oxidation were assessed.

Main Results:

• All supplemented diets (wakame, fish oil, and combined) significantly reduced serum and liver triacylglycerols compared to the control.
• The combined wakame-fish oil diet showed the greatest reduction in hepatic triacylglycerols.
• Combined intake significantly increased fatty acid beta-oxidation enzyme activity and serum beta-hydroxybutyrate, indicating enhanced fat breakdown.

Conclusions:

• Simultaneous consumption of wakame and fish oil demonstrates a synergistic effect on enhancing hepatic fatty acid beta-oxidation.
• This combination effectively decreases triacylglycerol concentrations in serum and liver.
• Findings suggest a beneficial impact of combining fish oil and wakame for managing lipid metabolism.