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  • Title: Effect of two high-oleic oils on the liver lipid composition of spontaneously hypertensive rats.
    Author: Perona JS, Ruiz-Gutiérrez V.
    Journal: Life Sci; 2000; 66(6):521-31. PubMed ID: 10794069.
    Abstract:
    Despite having similar fatty acid composition and plasma lipid composition after ingestion, olive oil, but not high-oleic sunflower oil (HOSO), is capable of reducing blood pressure. HOSO contains mainly triolein, whereas olive oil contains important amounts of dioleoyl-palmitoyl-glycerol. In order to see if its different triacylglycerol (TAG) composition could be related to the hypotensive effect of olive oil, Spontaneously Hypertensive Rats (SHR) were fed with HOSO and olive oil-rich diets. Liver lipid composition was determined. Total lipid, fatty acid and TAG composition was analyzed. Rats fed olive oil (67.24 +/- 4.23) were observed to retain more dioleoyl-acyl-glycerol species in their liver than those fed HOSO (56.6 +/- 3.95), specially triolein (20.69 +/- 1.77 olive oil, vs. 12.54 +/- 1.97 HOSO), in spite of its lower content of this TAG. On the contrary, rats consuming HOSO had higher amounts of dilinoleoyl-acyl-glycerol species (9.26 +/- 1.57 HOSO, vs.4.02 +/- 0.90 olive oil). In conclusion, olive oil provided a more beneficial TAG profile in the liver of SHR rats than HOSO, probably due to the differences in the TAG composition of both oils.
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