Effect of dietary fat composition on the metabolism of triacylglycerol-rich plasma lipoproteins in the postprandial phase in meal-fed rats.
Rats conditioned to eating fixed-size meals (meals at 7 AM and 7 PM), consuming diets rich in palm oil or sunflower seed oil, were used to study the metabolism of chylomicrons and hepatic very low density lipoproteins (VLDL) as a function of time after meal consumption. Rats fed a palm oil diet had...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
1988-05-01
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| Series: | Journal of Lipid Research |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0022227520385059 |
| _version_ | 1818862434072395776 |
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| author | P H Groot B C de Boer E Haddeman U M Houtsmuller W C Hülsmann |
| author_facet | P H Groot B C de Boer E Haddeman U M Houtsmuller W C Hülsmann |
| author_sort | P H Groot |
| collection | DOAJ |
| description | Rats conditioned to eating fixed-size meals (meals at 7 AM and 7 PM), consuming diets rich in palm oil or sunflower seed oil, were used to study the metabolism of chylomicrons and hepatic very low density lipoproteins (VLDL) as a function of time after meal consumption. Rats fed a palm oil diet had higher serum triacylglycerol levels at 7 AM, before the meal (1.96 +/- 0.25 mM vs. 1.09 +/- 0.09 mM) and reached higher levels postprandially (4.32 +/- 0.48 mM vs. 2.87 +/- 0.18 mM) than sunflower seed oil-fed animals, due to higher levels of hepatic VLDL (at 7 AM) and higher levels of chylomicrons and hepatic VLDL (in the postprandial phase). These differences in serum triacylglycerol concentrations between the diets tested were found not to be due to differences in hepatic VLDL triacylglycerol secretion (similar rate for both dietary groups and not very much affected by meal consumption) or chylomicron triacylglycerol secretion (similar response profiles on both diets), pointing towards differences in plasma triacylglycerol catabolism. Subsequent double-label studies on triacylglycerol catabolism of chylomicrons from palm oil- and sunflower seed oil-fed animals in chow-fed recipients showed that palm oil triacyglycerol is catabolized slower than sunflower seed oil triacylglycerol. Furthermore, activities of postheparin plasma lipoprotein lipase tended to be higher in sunflower seed oil-fed animals. From these data we conclude that the relative hypertriglyceridemia found in palm oil-fed animals is due to less efficient catabolism and not to increased synthesis of plasma triacylglycerol. |
| first_indexed | 2024-12-19T09:59:48Z |
| format | Article |
| id | doaj.art-eef26d2ddda44a2ca32b1a77665cc6c7 |
| institution | Directory Open Access Journal |
| issn | 0022-2275 |
| language | English |
| last_indexed | 2024-12-19T09:59:48Z |
| publishDate | 1988-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Lipid Research |
| spelling | doaj.art-eef26d2ddda44a2ca32b1a77665cc6c72022-12-21T20:26:42ZengElsevierJournal of Lipid Research0022-22751988-05-01295541551Effect of dietary fat composition on the metabolism of triacylglycerol-rich plasma lipoproteins in the postprandial phase in meal-fed rats.P H Groot0B C de Boer1E Haddeman2U M Houtsmuller3W C Hülsmann4Department of Biochemistry, Erasmus University Rotterdam, The Netherlands.Department of Biochemistry, Erasmus University Rotterdam, The Netherlands.Department of Biochemistry, Erasmus University Rotterdam, The Netherlands.Department of Biochemistry, Erasmus University Rotterdam, The Netherlands.Department of Biochemistry, Erasmus University Rotterdam, The Netherlands.Rats conditioned to eating fixed-size meals (meals at 7 AM and 7 PM), consuming diets rich in palm oil or sunflower seed oil, were used to study the metabolism of chylomicrons and hepatic very low density lipoproteins (VLDL) as a function of time after meal consumption. Rats fed a palm oil diet had higher serum triacylglycerol levels at 7 AM, before the meal (1.96 +/- 0.25 mM vs. 1.09 +/- 0.09 mM) and reached higher levels postprandially (4.32 +/- 0.48 mM vs. 2.87 +/- 0.18 mM) than sunflower seed oil-fed animals, due to higher levels of hepatic VLDL (at 7 AM) and higher levels of chylomicrons and hepatic VLDL (in the postprandial phase). These differences in serum triacylglycerol concentrations between the diets tested were found not to be due to differences in hepatic VLDL triacylglycerol secretion (similar rate for both dietary groups and not very much affected by meal consumption) or chylomicron triacylglycerol secretion (similar response profiles on both diets), pointing towards differences in plasma triacylglycerol catabolism. Subsequent double-label studies on triacylglycerol catabolism of chylomicrons from palm oil- and sunflower seed oil-fed animals in chow-fed recipients showed that palm oil triacyglycerol is catabolized slower than sunflower seed oil triacylglycerol. Furthermore, activities of postheparin plasma lipoprotein lipase tended to be higher in sunflower seed oil-fed animals. From these data we conclude that the relative hypertriglyceridemia found in palm oil-fed animals is due to less efficient catabolism and not to increased synthesis of plasma triacylglycerol.http://www.sciencedirect.com/science/article/pii/S0022227520385059 |
| spellingShingle | P H Groot B C de Boer E Haddeman U M Houtsmuller W C Hülsmann Effect of dietary fat composition on the metabolism of triacylglycerol-rich plasma lipoproteins in the postprandial phase in meal-fed rats. Journal of Lipid Research |
| title | Effect of dietary fat composition on the metabolism of triacylglycerol-rich plasma lipoproteins in the postprandial phase in meal-fed rats. |
| title_full | Effect of dietary fat composition on the metabolism of triacylglycerol-rich plasma lipoproteins in the postprandial phase in meal-fed rats. |
| title_fullStr | Effect of dietary fat composition on the metabolism of triacylglycerol-rich plasma lipoproteins in the postprandial phase in meal-fed rats. |
| title_full_unstemmed | Effect of dietary fat composition on the metabolism of triacylglycerol-rich plasma lipoproteins in the postprandial phase in meal-fed rats. |
| title_short | Effect of dietary fat composition on the metabolism of triacylglycerol-rich plasma lipoproteins in the postprandial phase in meal-fed rats. |
| title_sort | effect of dietary fat composition on the metabolism of triacylglycerol rich plasma lipoproteins in the postprandial phase in meal fed rats |
| url | http://www.sciencedirect.com/science/article/pii/S0022227520385059 |
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