Effect of the Dietary Fatty Acid Component on the Release of 14C-Taurocholate,14C-Bilirubin,Alkaline Phosphatase,and Aspartate Transaminase by Isolated Rat Liver Cells

Abstract

Rats were fed liquid diets for 7 days containing either triolein or Liposyn, which is rich in linoleic acid, as fat sources, and liver cell suspensions were prepared following collagenase perfusion. The release from isolated cells of alkaline phosphatase and aspartate transaminase during a 3-hr incubation did not differ. The uptake and release of ¹⁴C-taurocholate during a brief incubation was lower but not significantly in Liposyn-fed rats (0.1 > p > 0.05): the uptake was 9.74 ± 1.58 vs 16.7 ± 3.3 nmol/mg protein in triolein-fed rats; the release was 3.17 ± 0.65 vs 5.35 ± 1.01 nmol/mg protein in triolein-fed rats. The uptake of ¹⁴C-aminolevulinic acid was similar in both groups, but release of ¹⁴C-bilirubin during a 30-min incubation was 5,420 ± 1010 in the Liposyn group vs 12,030 ± 2,200 dpm/ mg protein in the triolein group (p = 0.02). It is concluded that a diet high in linoleic acid decreases bilirubin release in isolated liver cells consistent with the ability of this diet to cause cholestasis in vivo. (Journal of Parenteral and Enteral Nutrition 9:477-479, 1985)

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