Influence of dietary fat on metabolism of (14-14C)erucic acid in the perfused rat liver. Distribution of metabolites in lipid classes

Two groups of rats were fed diets containing 20% by weight of either partially hydrogenated marine oil supplemented with sunflower seed oil (PHMO) or palm oil (PO) for 8 wk. Using a liver perfusion system, the effect of dietary long chain monoenoic fatty acids on the uptake and metabolism of [14‐14C...

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Veröffentlicht in:Lipids 1986-06, Vol.21 (6), p.395-400
Hauptverfasser: Holmer, G, Ronneberg, R
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description Two groups of rats were fed diets containing 20% by weight of either partially hydrogenated marine oil supplemented with sunflower seed oil (PHMO) or palm oil (PO) for 8 wk. Using a liver perfusion system, the effect of dietary long chain monoenoic fatty acids on the uptake and metabolism of [14‐14C]erucic acid was studied. The perfusion times were 15 and 60 min, respectively. The two groups showed equal ability for erucic acid uptake in the liver but differed in the channeling of the fatty acids into various metabolic pathways. A higher metabolic turnover of 22∶1 in the PHMO livers relative to the PO livers was demonstrated by an increased recovery of total [14C]labeling in the triglyceride (TG) and phospholipid (PL) fractions, already evident after 15 min of perfusion. The chainshortening capacity was highest in the PHMO group, reflected by a higher [14C]18∶1 incorporation in both TG and PL, and increasing from 15 to 60 min of perfusion. The amount of [14C]18∶1 found in PL and TG after 60 min of perfusion of livers from rats fed PO corresponded to that shown for the PHMO group after 15 min. The PL demonstrated a discrimination against 22∶1 compared to TG, and, when available, 18∶1 was highly preferred for PL‐synthesis. The total fatty acid distribution in the TG, as determined by gas liquid chromatography (GLC), reflected the composition of the dietary fats. In the total liver PL, 22∶1 and 20∶1 were present in negligible amounts, although the PHMO diet contained 12–13% of both 22∶1 and 20∶1. In the free fatty acid fraction (FFA), the major part of the radioactivity (≈80%) was [14‐14C]erucic acid, and only small amounts of [14C]18∶1(
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Distribution of metabolites in lipid classes</title><source>MEDLINE</source><source>SpringerLink_现刊</source><creator>Holmer, G ; Ronneberg, R</creator><creatorcontrib>Holmer, G ; Ronneberg, R</creatorcontrib><description>Two groups of rats were fed diets containing 20% by weight of either partially hydrogenated marine oil supplemented with sunflower seed oil (PHMO) or palm oil (PO) for 8 wk. Using a liver perfusion system, the effect of dietary long chain monoenoic fatty acids on the uptake and metabolism of [14‐14C]erucic acid was studied. The perfusion times were 15 and 60 min, respectively. The two groups showed equal ability for erucic acid uptake in the liver but differed in the channeling of the fatty acids into various metabolic pathways. A higher metabolic turnover of 22∶1 in the PHMO livers relative to the PO livers was demonstrated by an increased recovery of total [14C]labeling in the triglyceride (TG) and phospholipid (PL) fractions, already evident after 15 min of perfusion. The chainshortening capacity was highest in the PHMO group, reflected by a higher [14C]18∶1 incorporation in both TG and PL, and increasing from 15 to 60 min of perfusion. The amount of [14C]18∶1 found in PL and TG after 60 min of perfusion of livers from rats fed PO corresponded to that shown for the PHMO group after 15 min. The PL demonstrated a discrimination against 22∶1 compared to TG, and, when available, 18∶1 was highly preferred for PL‐synthesis. The total fatty acid distribution in the TG, as determined by gas liquid chromatography (GLC), reflected the composition of the dietary fats. In the total liver PL, 22∶1 and 20∶1 were present in negligible amounts, although the PHMO diet contained 12–13% of both 22∶1 and 20∶1. In the free fatty acid fraction (FFA), the major part of the radioactivity (≈80%) was [14‐14C]erucic acid, and only small amounts of [14C]18∶1(&lt;2%) were presents, even after 60 min of perfusion. The shortened‐chain 18∶1 was readily removed from the FFA pool and preferentially used for lipid esterification.</description><identifier>ISSN: 0024-4201</identifier><identifier>EISSN: 1558-9307</identifier><identifier>DOI: 10.1007/BF02534934</identifier><identifier>PMID: 3736348</identifier><identifier>CODEN: LPDSAP</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer‐Verlag</publisher><subject>ACIDE ERUCIQUE ; ACIDO ERUCICO ; Animals ; Biological and medical sciences ; Carbon Radioisotopes ; CORPS GRAS ; Dietary Fats - pharmacology ; ERUCIC ACID ; Erucic Acids - metabolism ; FATS ; Fatty Acids - analysis ; Fatty Acids, Unsaturated - metabolism ; FOIE ; Fundamental and applied biological sciences. 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Distribution of metabolites in lipid classes</title><title>Lipids</title><addtitle>Lipids</addtitle><description>Two groups of rats were fed diets containing 20% by weight of either partially hydrogenated marine oil supplemented with sunflower seed oil (PHMO) or palm oil (PO) for 8 wk. Using a liver perfusion system, the effect of dietary long chain monoenoic fatty acids on the uptake and metabolism of [14‐14C]erucic acid was studied. The perfusion times were 15 and 60 min, respectively. The two groups showed equal ability for erucic acid uptake in the liver but differed in the channeling of the fatty acids into various metabolic pathways. A higher metabolic turnover of 22∶1 in the PHMO livers relative to the PO livers was demonstrated by an increased recovery of total [14C]labeling in the triglyceride (TG) and phospholipid (PL) fractions, already evident after 15 min of perfusion. The chainshortening capacity was highest in the PHMO group, reflected by a higher [14C]18∶1 incorporation in both TG and PL, and increasing from 15 to 60 min of perfusion. The amount of [14C]18∶1 found in PL and TG after 60 min of perfusion of livers from rats fed PO corresponded to that shown for the PHMO group after 15 min. The PL demonstrated a discrimination against 22∶1 compared to TG, and, when available, 18∶1 was highly preferred for PL‐synthesis. The total fatty acid distribution in the TG, as determined by gas liquid chromatography (GLC), reflected the composition of the dietary fats. In the total liver PL, 22∶1 and 20∶1 were present in negligible amounts, although the PHMO diet contained 12–13% of both 22∶1 and 20∶1. In the free fatty acid fraction (FFA), the major part of the radioactivity (≈80%) was [14‐14C]erucic acid, and only small amounts of [14C]18∶1(&lt;2%) were presents, even after 60 min of perfusion. 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Distribution of metabolites in lipid classes</title><author>Holmer, G ; Ronneberg, R</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3715-45c3ff6f48ba6b6356bc2282c26b2cfd869f83900634fe2ca9addb196dca4bec3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1986</creationdate><topic>ACIDE ERUCIQUE</topic><topic>ACIDO ERUCICO</topic><topic>Animals</topic><topic>Biological and medical sciences</topic><topic>Carbon Radioisotopes</topic><topic>CORPS GRAS</topic><topic>Dietary Fats - pharmacology</topic><topic>ERUCIC ACID</topic><topic>Erucic Acids - metabolism</topic><topic>FATS</topic><topic>Fatty Acids - analysis</topic><topic>Fatty Acids, Unsaturated - metabolism</topic><topic>FOIE</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>GRASAS</topic><topic>HIGADO</topic><topic>LIVER</topic><topic>Liver - drug effects</topic><topic>Liver - metabolism</topic><topic>Liver. Bile. Biliary tracts</topic><topic>Male</topic><topic>METABOLISM</topic><topic>METABOLISME</topic><topic>METABOLISMO</topic><topic>METABOLITE</topic><topic>METABOLITES</topic><topic>METABOLITOS</topic><topic>Oils</topic><topic>Perfusion</topic><topic>RAT</topic><topic>RATA</topic><topic>RATS</topic><topic>Rats, Inbred Strains</topic><topic>Vertebrates: digestive system</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Holmer, G</creatorcontrib><creatorcontrib>Ronneberg, R</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Lipids</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Holmer, G</au><au>Ronneberg, R</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Influence of dietary fat on metabolism of (14-14C)erucic acid in the perfused rat liver. Distribution of metabolites in lipid classes</atitle><jtitle>Lipids</jtitle><addtitle>Lipids</addtitle><date>1986-06</date><risdate>1986</risdate><volume>21</volume><issue>6</issue><spage>395</spage><epage>400</epage><pages>395-400</pages><issn>0024-4201</issn><eissn>1558-9307</eissn><coden>LPDSAP</coden><abstract>Two groups of rats were fed diets containing 20% by weight of either partially hydrogenated marine oil supplemented with sunflower seed oil (PHMO) or palm oil (PO) for 8 wk. Using a liver perfusion system, the effect of dietary long chain monoenoic fatty acids on the uptake and metabolism of [14‐14C]erucic acid was studied. The perfusion times were 15 and 60 min, respectively. The two groups showed equal ability for erucic acid uptake in the liver but differed in the channeling of the fatty acids into various metabolic pathways. A higher metabolic turnover of 22∶1 in the PHMO livers relative to the PO livers was demonstrated by an increased recovery of total [14C]labeling in the triglyceride (TG) and phospholipid (PL) fractions, already evident after 15 min of perfusion. The chainshortening capacity was highest in the PHMO group, reflected by a higher [14C]18∶1 incorporation in both TG and PL, and increasing from 15 to 60 min of perfusion. The amount of [14C]18∶1 found in PL and TG after 60 min of perfusion of livers from rats fed PO corresponded to that shown for the PHMO group after 15 min. The PL demonstrated a discrimination against 22∶1 compared to TG, and, when available, 18∶1 was highly preferred for PL‐synthesis. The total fatty acid distribution in the TG, as determined by gas liquid chromatography (GLC), reflected the composition of the dietary fats. In the total liver PL, 22∶1 and 20∶1 were present in negligible amounts, although the PHMO diet contained 12–13% of both 22∶1 and 20∶1. In the free fatty acid fraction (FFA), the major part of the radioactivity (≈80%) was [14‐14C]erucic acid, and only small amounts of [14C]18∶1(&lt;2%) were presents, even after 60 min of perfusion. The shortened‐chain 18∶1 was readily removed from the FFA pool and preferentially used for lipid esterification.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer‐Verlag</pub><pmid>3736348</pmid><doi>10.1007/BF02534934</doi><tpages>6</tpages></addata></record>
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subjects ACIDE ERUCIQUE
ACIDO ERUCICO
Animals
Biological and medical sciences
Carbon Radioisotopes
CORPS GRAS
Dietary Fats - pharmacology
ERUCIC ACID
Erucic Acids - metabolism
FATS
Fatty Acids - analysis
Fatty Acids, Unsaturated - metabolism
FOIE
Fundamental and applied biological sciences. Psychology
GRASAS
HIGADO
LIVER
Liver - drug effects
Liver - metabolism
Liver. Bile. Biliary tracts
Male
METABOLISM
METABOLISME
METABOLISMO
METABOLITE
METABOLITES
METABOLITOS
Oils
Perfusion
RAT
RATA
RATS
Rats, Inbred Strains
Vertebrates: digestive system
title Influence of dietary fat on metabolism of (14-14C)erucic acid in the perfused rat liver. Distribution of metabolites in lipid classes
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