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Effect of two high-oleic oils on the liver lipid composition of spontaneously hypertensive rats

AuthorsPerona, Javier S. ; Ruiz-Gutiérrez, Valentina
KeywordsOlive oil
High-oleic sunflower oil
Spontaneously hypertensive rat
Issue Date2000
CitationLife Sciences 66(6): 521-531 (2000)
AbstractDespite 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.
Publisher version (URL)http://dx.doi.org/10.1016/S0024-3205(99)00622-0
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