Postprandial changes in high density lipoproteins in rats subjected to gavage administration of virgin olive oil.

<h4>Background and aims</h4>The present study was designed to verify the influence of acute fat loading on high density lipoprotein (HDL) composition, and the involvement of liver and different segments of small intestine in the changes observed.<h4>Methods and results</h4>To...

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Autores principales:	Roberto Martínez-Beamonte, María A Navarro, Sergio Acin, Natalia Guillén, Cristina Barranquero, Carmen Arnal, Joaquín Surra, Jesus Osada
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a4aa2c44566648bc96fcbcdd883d4fbd
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spelling	oai:doaj.org-article:a4aa2c44566648bc96fcbcdd883d4fbd2021-11-18T07:59:39ZPostprandial changes in high density lipoproteins in rats subjected to gavage administration of virgin olive oil.1932-620310.1371/journal.pone.0055231https://doaj.org/article/a4aa2c44566648bc96fcbcdd883d4fbd2013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23383120/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background and aims</h4>The present study was designed to verify the influence of acute fat loading on high density lipoprotein (HDL) composition, and the involvement of liver and different segments of small intestine in the changes observed.<h4>Methods and results</h4>To address these issues, rats were administered a bolus of 5-ml of extra-virgin olive oil and sacrificed 4 and 8 hours after feeding. In these animals, lipoproteins were analyzed and gene expressions of apolipoprotein and HDL enzymes were assessed in duodenum, jejunum, ileum and liver. Using this experimental design, total plasma and HDL phospholipids increased at the 8-hour-time-point due to increased sphingomyelin content. An increase in apolipoprotein A4 was also observed mainly in lipid-poor HDL. Increased expression of intestinal Apoa1, Apoa4 and Sgms1 mRNA was accompanied by hepatic decreases in the first two genes in liver. Hepatic expression of Abcg1, Apoa1bp, Apoa2, Apoe, Ptlp, Pon1 and Scarb1 decreased significantly following fat gavage, while no changes were observed for Abca1, Lcat or Pla2g7. Significant associations were also noted for hepatic expression of apolipoproteins and Pon1. Manipulation of postprandial triglycerides using an inhibitor of microsomal transfer protein -CP-346086- or of lipoprotein lipase -tyloxapol- did not influence hepatic expression of Apoa1 or Apoa4 mRNA.<h4>Conclusion</h4>All these data indicate that dietary fat modifies the phospholipid composition of rat HDL, suggesting a mechanism of down-regulation of hepatic HDL when intestine is the main source of those particles and a coordinated regulation of hepatic components of these lipoproteins at the mRNA level, independently of plasma postprandial triglycerides.Roberto Martínez-BeamonteMaría A NavarroSergio AcinNatalia GuillénCristina BarranqueroCarmen ArnalJoaquín SurraJesus OsadaPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 1, p e55231 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Roberto Martínez-Beamonte María A Navarro Sergio Acin Natalia Guillén Cristina Barranquero Carmen Arnal Joaquín Surra Jesus Osada Postprandial changes in high density lipoproteins in rats subjected to gavage administration of virgin olive oil.
description	<h4>Background and aims</h4>The present study was designed to verify the influence of acute fat loading on high density lipoprotein (HDL) composition, and the involvement of liver and different segments of small intestine in the changes observed.<h4>Methods and results</h4>To address these issues, rats were administered a bolus of 5-ml of extra-virgin olive oil and sacrificed 4 and 8 hours after feeding. In these animals, lipoproteins were analyzed and gene expressions of apolipoprotein and HDL enzymes were assessed in duodenum, jejunum, ileum and liver. Using this experimental design, total plasma and HDL phospholipids increased at the 8-hour-time-point due to increased sphingomyelin content. An increase in apolipoprotein A4 was also observed mainly in lipid-poor HDL. Increased expression of intestinal Apoa1, Apoa4 and Sgms1 mRNA was accompanied by hepatic decreases in the first two genes in liver. Hepatic expression of Abcg1, Apoa1bp, Apoa2, Apoe, Ptlp, Pon1 and Scarb1 decreased significantly following fat gavage, while no changes were observed for Abca1, Lcat or Pla2g7. Significant associations were also noted for hepatic expression of apolipoproteins and Pon1. Manipulation of postprandial triglycerides using an inhibitor of microsomal transfer protein -CP-346086- or of lipoprotein lipase -tyloxapol- did not influence hepatic expression of Apoa1 or Apoa4 mRNA.<h4>Conclusion</h4>All these data indicate that dietary fat modifies the phospholipid composition of rat HDL, suggesting a mechanism of down-regulation of hepatic HDL when intestine is the main source of those particles and a coordinated regulation of hepatic components of these lipoproteins at the mRNA level, independently of plasma postprandial triglycerides.
format	article
author	Roberto Martínez-Beamonte María A Navarro Sergio Acin Natalia Guillén Cristina Barranquero Carmen Arnal Joaquín Surra Jesus Osada
author_facet	Roberto Martínez-Beamonte María A Navarro Sergio Acin Natalia Guillén Cristina Barranquero Carmen Arnal Joaquín Surra Jesus Osada
author_sort	Roberto Martínez-Beamonte
title	Postprandial changes in high density lipoproteins in rats subjected to gavage administration of virgin olive oil.
title_short	Postprandial changes in high density lipoproteins in rats subjected to gavage administration of virgin olive oil.
title_full	Postprandial changes in high density lipoproteins in rats subjected to gavage administration of virgin olive oil.
title_fullStr	Postprandial changes in high density lipoproteins in rats subjected to gavage administration of virgin olive oil.
title_full_unstemmed	Postprandial changes in high density lipoproteins in rats subjected to gavage administration of virgin olive oil.
title_sort	postprandial changes in high density lipoproteins in rats subjected to gavage administration of virgin olive oil.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/a4aa2c44566648bc96fcbcdd883d4fbd
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Postprandial changes in high density lipoproteins in rats subjected to gavage administration of virgin olive oil.

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