DHA Esterified to Phosphatidylserine or Phosphatidylcholine is More Efficient at Targeting the Brain than DHA Esterified to Triacylglycerol.
Level 5 - mechanism / opinion, no new human data
Preclinical animal study
PubMed 30768751 · doi:10.1002/mnfr.201801224
What was done
Ten-week-old rats received an acute oral gavage of 3H-labeled DHA esterified to one of four lipid carriers: phosphatidylcholine (DHA-PtdCho), phosphatidylethanolamine (DHA-PtdEtn), phosphatidylserine (DHA-PtdSer), or triacylglycerol (DHA-TG). Animals were euthanized 6 hours post-gavage, and radioactivity was quantified in the cerebral cortex and serum lipid classes.
What was found
Radioactivity recovered in cortex total phospholipids was similar between DHA-PtdCho and DHA-PtdSer groups, showing 5.8-fold and 6.7-fold higher levels, respectively, than in the DHA-TG group. Serum total lipid radioactivity was significantly higher in the DHA-PtdSer group compared with DHA-PtdCho and DHA-PtdEtn groups, but was not significantly different from the DHA-TG group. Cortical values for DHA-PtdEtn were not quantified in the abstract.
Why it matters
This indicates that phospholipid-bound DHA, particularly forms esterified to phosphatidylserine and phosphatidylcholine, penetrates the rodent brain much more effectively after oral intake than standard triacylglycerol DHA.
Limits
The experiment was conducted in rats and may not reflect human physiology. Sample size (n) was not reported in the abstract. Uptake was measured at a single acute time point (6 hours) without assessing long-term incorporation or functional cognitive outcomes.
Cited by
- supports In single-dose rodent studies, more omega-3 fatty acids enter the brain in the phospholipid form compared to the triglyceride form.