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Differential influence of different dietary fatty acids on very low-density lipoprotein secretion when delivered to hepatocytes in chylomicron remnants.
Metabolism. 2009 Feb; 58(2):186-95.M

Abstract

The influence of dietary fats carried in chylomicron remnants on the hepatic secretion of very low-density lipoprotein (VLDL) was investigated using chylomicron remnant-like particles (CRLPs) and cultured rat hepatocytes as the experimental model. Chylomicron remnant-like particles containing triacylglycerol (TG) from palm, olive, or corn (enriched in saturated, monounsaturated, or n-6 polyunsaturated fatty acids) oil, respectively, were incubated with cultured hepatocytes for 5 hours. The medium was then removed and replaced with medium without CRLPs; and the secretion of TG, cholesterol, and apolipoprotein B48 during the following 16 hours was determined. Secretion of TG into the d less than 1.050-g/mL fraction containing VLDL was unaffected by olive CRLPs, but was significantly increased in cells exposed to palm or corn CRLPs in comparison with both olive CRLPs and control incubations without CRLPs. Secretion of apolipoprotein B48, however, was not changed by any of the CRLP types. Apolipoprotein B messenger RNA levels were decreased by olive and corn CRLPs, and 3-hydroxy-3-methylglutaryl coenzyme A reductase messenger RNA abundance was increased by palm CRLPs; but expression of other genes involved in the regulation of VLDL secretion was unaffected. These findings demonstrate that CRLPs enriched in saturated fatty acids or n-6 polyunsaturated fatty acids increase the secretion of TG in VLDL, possibly because of the secretion of larger particles, whereas those enriched in monounsaturated fatty acids have no effect. Thus, different dietary fats have differential effects on VLDL secretion directly when delivered to the liver in chylomicron remnants.

Authors+Show Affiliations

Department of Veterinary Basic Sciences, The Royal Veterinary College, NW1 0TU London, United Kingdom.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19154951

Citation

López-Soldado, Iliana, et al. "Differential Influence of Different Dietary Fatty Acids On Very Low-density Lipoprotein Secretion when Delivered to Hepatocytes in Chylomicron Remnants." Metabolism: Clinical and Experimental, vol. 58, no. 2, 2009, pp. 186-95.
López-Soldado I, Avella M, Botham KM. Differential influence of different dietary fatty acids on very low-density lipoprotein secretion when delivered to hepatocytes in chylomicron remnants. Metab Clin Exp. 2009;58(2):186-95.
López-Soldado, I., Avella, M., & Botham, K. M. (2009). Differential influence of different dietary fatty acids on very low-density lipoprotein secretion when delivered to hepatocytes in chylomicron remnants. Metabolism: Clinical and Experimental, 58(2), 186-95. https://doi.org/10.1016/j.metabol.2008.09.012
López-Soldado I, Avella M, Botham KM. Differential Influence of Different Dietary Fatty Acids On Very Low-density Lipoprotein Secretion when Delivered to Hepatocytes in Chylomicron Remnants. Metab Clin Exp. 2009;58(2):186-95. PubMed PMID: 19154951.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Differential influence of different dietary fatty acids on very low-density lipoprotein secretion when delivered to hepatocytes in chylomicron remnants. AU - López-Soldado,Iliana, AU - Avella,Michael, AU - Botham,Kathleen M, PY - 2008/04/01/received PY - 2008/09/22/accepted PY - 2009/1/22/entrez PY - 2009/1/22/pubmed PY - 2009/2/28/medline SP - 186 EP - 95 JF - Metabolism: clinical and experimental JO - Metab. Clin. Exp. VL - 58 IS - 2 N2 - The influence of dietary fats carried in chylomicron remnants on the hepatic secretion of very low-density lipoprotein (VLDL) was investigated using chylomicron remnant-like particles (CRLPs) and cultured rat hepatocytes as the experimental model. Chylomicron remnant-like particles containing triacylglycerol (TG) from palm, olive, or corn (enriched in saturated, monounsaturated, or n-6 polyunsaturated fatty acids) oil, respectively, were incubated with cultured hepatocytes for 5 hours. The medium was then removed and replaced with medium without CRLPs; and the secretion of TG, cholesterol, and apolipoprotein B48 during the following 16 hours was determined. Secretion of TG into the d less than 1.050-g/mL fraction containing VLDL was unaffected by olive CRLPs, but was significantly increased in cells exposed to palm or corn CRLPs in comparison with both olive CRLPs and control incubations without CRLPs. Secretion of apolipoprotein B48, however, was not changed by any of the CRLP types. Apolipoprotein B messenger RNA levels were decreased by olive and corn CRLPs, and 3-hydroxy-3-methylglutaryl coenzyme A reductase messenger RNA abundance was increased by palm CRLPs; but expression of other genes involved in the regulation of VLDL secretion was unaffected. These findings demonstrate that CRLPs enriched in saturated fatty acids or n-6 polyunsaturated fatty acids increase the secretion of TG in VLDL, possibly because of the secretion of larger particles, whereas those enriched in monounsaturated fatty acids have no effect. Thus, different dietary fats have differential effects on VLDL secretion directly when delivered to the liver in chylomicron remnants. SN - 1532-8600 UR - https://www.unboundmedicine.com/medline/citation/19154951/Differential_influence_of_different_dietary_fatty_acids_on_very_low_density_lipoprotein_secretion_when_delivered_to_hepatocytes_in_chylomicron_remnants_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0026-0495(08)00349-1 DB - PRIME DP - Unbound Medicine ER -