scholarly journals Thetrans-10,cis-12 isomer of conjugated linoleic acid reduces hepatic triacylglycerol content without affecting lipogenic enzymes in hamsters

2004 ◽  
Vol 92 (3) ◽  
pp. 383-389 ◽  
Author(s):  
Amaia Zabala ◽  
Itziar Churruca ◽  
M. Teresa Macarulla ◽  
Víctor M. Rodríguez ◽  
Alfredo Fernández-Quintela ◽  
...  
Keyword(s):  
Linoleic Acid ◽  
Conjugated Linoleic Acid ◽  
Regulatory Element ◽  
Liver Weight ◽  
Liver Fat ◽  
Mrna Levels ◽  
Lipogenic Enzymes ◽  
Fat Accumulation ◽  
Triacylglycerol Content ◽  
Hepatic Triacylglycerol

Conjugated linoleic acid (CLA) refers to the positional and geometric dienoic isomers of linoleic acid. The dietary intake of CLA has been associated with changes in lipid metabolism. The aim of the present work was to assess the effects of the two main isomers of CLA on sterol regulatory element binding protein (SREBP)-1a and SREBP-1c mRNA levels, as well as on mRNA levels and the activities of several lipogenic enzymes in liver. For this purpose hamsters were fed an atherogenic diet supplemented with 5 g linoleic acid,cis-9,trans-11 ortrans-10,cis-12 CLA/kg diet for 6 weeks. Thetrans-10,cis-12 isomer intake produced significantly greater liver weight, but also significantly decreased liver fat accumulation. No changes in mRNA levels of SREBP-1a, SREBP-1c and lipogenic enzymes, or in the activities of these enzymes, were observed. There was no effect of feedingcis-9,trans-11 CLA. These results suggest that increased fat accumulation in liver does not occur on the basis of liver enlargement produced by feeding thetrans-10,cis-12 isomer of CLA in hamsters. The reduction in hepatic triacylglycerol content induced by this isomer was not attributable to changes in lipogenesis.

scholarly journals Maternal conjugated linoleic acid modulates TAG metabolism in adult rat offspring

2017 ◽  
Vol 118 (11) ◽  
pp. 906-913 ◽  
Author(s):  
Jimena Lavandera ◽  
Carolina D. Gerstner ◽  
Juliana Saín ◽  
Ana C. Fariña ◽  
Marcela A. González ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Fatty Acid ◽  
Linoleic Acid ◽  
Conjugated Linoleic Acid ◽  
Fatty Acid Synthase ◽  
Regulatory Element ◽  
Male Rat ◽  
Mrna Levels ◽  
Fat Depots ◽  
Rat Offspring

AbstractConjugated linoleic acid (CLA) might regulate the lipid depots in liver and adipose tissue. As there is an association between maternal nutrition, fat depots and risk of offspring chronic disease, the aim was to investigate the effect of maternal CLA consumption on TAG regulation and some inflammatory parameters in adult male rat offspring receiving or not receiving CLA. Female Wistar rats were fed control (C) or CLA-supplemented (1 %, w/w) diets during 4 weeks before and throughout pregnancy and lactation. After weaning, male offspring of CLA rats were fed C or CLA diets (CLA/C and CLA/CLA groups, respectively), whereas C male rat offspring were fed a C diet (C/C group) for 9 weeks. Serum TAG levels were increased in the CLA/CLA and CLA/C groups, associated with a reduction of lipoprotein lipase activity and weights of adipose tissue. The liver TAG levels were decreased in the CLA/CLA group, related to a significant reduction of fatty acid synthase (FAS), acetyl-CoA carboxylase (ACC) and glucose-6-phosphate dehydrogenase enzyme activities, as well as to the mRNA levels of FAS, ACC, stearoyl-CoA desaturase-1 and sterol regulatory element-binding protein-1c. Even though normal TAG levels were found in the liver of CLA/C rats, a reduction of lipogenesis was also observed. Thus, these results demonstrated a programming effect of CLA on the lipid metabolic pathways leading to a preventive effect on the TAG accretion in adipose tissue and the liver of male rat offspring. This knowledge could be important to develop some dietary strategies leading to a reduced incidence of obesity and fatty acid liver disease in humans.

scholarly journals Eicosapentaenoic acid and 3,10 dithia stearic acid inhibit the desaturation of trans-vaccenic acid into cis-9, trans-11-conjugated linoleic acid through different pathways in Caco-2 and T84 cells

2006 ◽  
Vol 95 (4) ◽  
pp. 688-695 ◽  
Author(s):  
Renaville Bénédicte ◽  
Anne Mullen ◽  
Fiona Moloney ◽  
Yvan Larondelle ◽  
Yves-Jacques Schneider ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Linoleic Acid ◽  
Stearic Acid ◽  
Conjugated Linoleic Acid ◽  
Vaccenic Acid ◽  
Regulatory Element ◽  
Mrna Levels ◽  
T84 Cells ◽  
Key Enzyme

Stearoyl-CoA desaturase (SCD) is a key enzyme that determines the composition and metabolic fate of ingested fatty acids, in particular the conversion of trans-vaccenic acid (TVA) to conjugated linoleic acid (CLA). The present study addressed the hypothesis that intestinal TVA absorption and biotransformation into CLA can be modulated by EPA and 3,10-dithia stearic acid (DSA) via altered SCD mRNA levels and desaturation indices (cis-9, trans-11-CLA:TVA and oleic acid:stearic acid ratios) in Caco-2 and T84 cells, two well-established in vitro models of the human intestinal epithelium. The study determined the effect of acute (3h with 0·3mm-EPA or 0·3mm-DSA) and acute-on-chronic (1 week with 0·03mm-EPA or -DSA, followed by respectively, 0·3mm-EPA or -DSA for 3h) treatments. In both cell lines, acute EPA treatment did not alter SCD desaturation indices, whereas the acute-on-chronic treatment affected these surrogate markers of SCD activity. This was associated with reduced sterol regulatory-element binding protein-1c and SCD mRNA levels. In contrast, acute and acute-on-chronic DSA treatments significantly reduced SCD desaturation indices without affecting SCD mRNA levels in Caco-2 cells. The present study on intestinal cells shows that the conversion rate of TVA to c9, t11-CLA is affected by other fatty acids present in the diet such as EPA, confirming previous observations in hepatic and mammary cell models.

scholarly journals Effects of Exercise Training on Molecular Markers of Lipogenesis and Lipid Partitioning in Fructose-Induced Liver Fat Accumulation

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Siham Yasari ◽  
Denis Prud'homme ◽  
Frédérique Tesson ◽  
Marek Jankowski ◽  
Jolanta Gutkowska ◽  
...  
Keyword(s):  
Gene Expression ◽  
Exercise Training ◽  
Unsaturated Fatty Acids ◽  
Regulatory Element ◽  
Female Rats ◽  
Liver Fat ◽  
Standard Diet ◽  
Fat Accumulation ◽  
High Fructose ◽  
The Impact

The present study was designed to investigate the impact of exercise training on lipogenic gene expression in liver and lipid partitioning following the ingestion of a high fructose load. Female rats were exercise-trained for 8 wk or kept sedentary before being submitted to a fasting/refeeding protocol. Rats were further subdivided as follow: rats were fasted for 24 h, refed a standard diet for 24 h, starved for another 24 h, and refed with a standard or a high-fructose diet 24 h before sacrifice. Fructose refeeding was associated with an increase in hepatic lipid content, endocannabinoid receptor 1, sterol regulatory element-binding protein1c, and stearoyl-CoA desaturase1 gene expression in both Sed and TR rats. However, desaturation indexes measured in liver (C16 : 1/C16 : 0 and C18 : 1/C18 : 0) and plasma (C18 : 1/C18 : 0) were higher (P<0.01) in TR than in Sed rats following fructose refeeding. It is concluded that exercise training does not significantly affect fat accumulation and the molecular expression of genes involved in lipogenesis after fasting and fructose refeeding but does modify the partitioning of lipids so as to provide more unsaturated fatty acids in liver without affecting liver fat content.

Effects of conjugated linoleic acid (CLA) on fat accumulation, activity, and proteomics analysis in Caenorhabditis elegans

2018 ◽  
Vol 249 ◽  
pp. 193-201 ◽  
Author(s):  
Peiyi Shen ◽  
Jonathan C. Kershaw ◽  
Yiren Yue ◽  
Ou Wang ◽  
Kee-Hong Kim ◽  
...  
Keyword(s):  
Linoleic Acid ◽  
Caenorhabditis Elegans ◽  
Conjugated Linoleic Acid ◽  
Proteomics Analysis ◽  
Fat Accumulation

scholarly journals Conjugated Linoleic Acid Reduces Hepatic Microsomal Triacylglycerol Transfer Protein Activity and Hepatic Triacylglycerol Mass in Obese Rats.

2003 ◽  
Vol 52 (3) ◽  
pp. 129-134 ◽  
Author(s):  
Yu-Ming WANG ◽  
Shaikh Mizanoor RAHMAN ◽  
Koji NAGAO ◽  
Seo-Young HAN ◽  
Yohanes BUANG ◽  
...  
Keyword(s):  
Linoleic Acid ◽  
Conjugated Linoleic Acid ◽  
Protein Activity ◽  
Transfer Protein ◽  
Obese Rats ◽  
Hepatic Triacylglycerol

Conjugated linoleic acid rapidly reduces body fat content in mice without affecting energy intake

1999 ◽  
Vol 276 (4) ◽  
pp. R1172-R1179 ◽  
Author(s):  
James P. DeLany ◽  
Fawn Blohm ◽  
Alycia A. Truett ◽  
Joseph A. Scimeca ◽  
David B. West
Keyword(s):  
Body Composition ◽  
Linoleic Acid ◽  
Food Intake ◽  
Conjugated Linoleic Acid ◽  
Energy Intake ◽  
Body Fat ◽  
Metabolic Effects ◽  
Protein Accumulation ◽  
High Fat ◽  
Fat Accumulation

Recent reports have demonstrated that conjugated linoleic acid (CLA) has effects on body fat accumulation. In our previous work, CLA reduced body fat accumulation in mice fed either a high-fat or low-fat diet. Although CLA feeding reduced energy intake, the results suggested that some of the metabolic effects were not a consequence of the reduced food intake. We therefore undertook a study to determine a dose of CLA that would have effects on body composition without affecting energy intake. Five doses of CLA (0.0, 0.25, 0.50, 0.75, and 1.0% by weight) were studied in AKR/J male mice ( n = 12/group; age, 39 days) maintained on a high-fat diet (%fat 45 kcal). Energy intake was not suppressed by any CLA dose. Body fat was significantly lower in the 0.50, 0.75, and 1.0% CLA groups compared with controls. The retroperitoneal depot was most sensitive to the effects of CLA, whereas the epididymal depot was relatively resistant. Higher doses of CLA also significantly increased carcass protein content. A time-course study of the effects of 1% CLA on body composition showed reductions in fat pad weights within 2 wk and continued throughout 12 wk of CLA feeding. In conclusion, CLA feeding produces a rapid, marked decrease in fat accumulation, and an increase in protein accumulation, at relatively low doses without any major effects on food intake.

Supplementation with methyl donors during lactation to high-fat-sucrose-fed dams protects offspring against liver fat accumulation when consuming an obesogenic diet

2014 ◽  
Vol 5 (5) ◽  
pp. 385-395 ◽  
Author(s):  
P. Cordero ◽  
F. I. Milagro ◽  
J. Campion ◽  
J. A. Martinez
Keyword(s):  
Control Diet ◽  
Liver Fat ◽  
Chow Diet ◽  
Mrna Levels ◽  
High Fat ◽  
Adult Rats ◽  
Fat Accumulation ◽  
Methyl Donors ◽  
Methyl Donor ◽  
Obesogenic Diet

Methyl donor supplementation has been reported to prevent obesity-induced liver fat accumulation in adult rats. We hypothesized that this protection could be mediated by perinatal nutrition. For this purpose, we assessed the response to an obesogenic diet (high-fat-sucrose, HFS) during adulthood depending on maternal diet during lactation. Female Wistar rats fed control diet during pregnancy were assigned to four postpartum dietary groups: control, control supplemented with methyl donors (choline, betaine, folic acid, vitamin B12), HFS and HFS supplemented with methyl donors. At weaning, the male offspring was transferred to a chow diet and at week 12th assigned to a control or a HFS diet during 8 weeks. The offspring whose mothers were fed HFS during lactation showed increased adiposity (19%,P<0.001). When fed the HFS diet as adults, offspring whose mothers were HFS supplemented had more body fat (23%,P<0.001) than those from HFS non-supplemented. However, they showed lower liver fat accumulation (−18%,P<0.001). Srebf1, Dnmt1 and Lepr liver mRNA levels increased after adulthood HFS feeding. In those animals HFS fed during adulthood, previous maternal HFS decreased Lepr and Dnmt1 expression levels when compared with c-HFS offspring, while the supplementation of control and HFS-fed dams, respectively, induced higher hepatic Mme and Lepr mRNA levels after adult HFS intake compared with hfs-HFS offspring. In conclusion, maternal HFS diet during lactation influenced the response to an obesogenic diet in the adult progeny. Interestingly, dietary methyl donor supplementation in lactating mothers fed an obesogenic diet reduced liver fat accumulation, but increased adipose tissue storage in adult HFS-fed offspring.

scholarly journals Effects of conjugated linoleic acid (CLA) isomers on lipid levels and peroxisome proliferation in the hamster

1999 ◽  
Vol 82 (4) ◽  
pp. 309-317 ◽  
Author(s):  
Emile A. M. de Deckere ◽  
Johan M. M. van Amelsvoort ◽  
Gerald P. McNeill ◽  
Penny Jones
Keyword(s):  
Linoleic Acid ◽  
Conjugated Linoleic Acid ◽  
Hdl Cholesterol ◽  
Liver Weight ◽  
Peroxisome Proliferation ◽  
Lipid Levels ◽  
Fat Pad ◽  
Active Isomer ◽  
Carnitine Acetyl Transferase ◽  
Cla Isomers

Effects of the conjugated linoleic acid (CLA) isomers cis-9, trans-11 (c9, t11 CLA) and trans-10, cis-12 (t10, c12 CLA) on lipid metabolism and markers of peroxisome proliferation were investigated in hamsters fed on purified diets containing 30 % energy as fat and 0·1 g cholesterol/kg for 8 weeks. Four groups (n 32 each) received diets without CLA (control), with a mixture of equal amounts of c9, t11 and t10, c12 CLA (CLA mix), with c9, t11 CLA, and with t10, c12 CLA. The total amount of CLA isomers was 1·5 % energy or 6·6 g/kg diet. CLA was incorporated into glycerides and exchanged for linoleic acid in the diet. Compared with the control, the CLA mix and t10, c12 CLA decreased fasting values of LDL- (21 and 18 % respectively) and HDL-cholesterol (8 and 11 %), increased VLDL-triacylglycerol (80 and 61 %), and decreased epididymal fat pad weights (9 and 16 %), whereas c9, t11 CLA had no significant effects. All CLA preparations increased liver weight, but not liver lipids. However, the increase in liver weight was much less in the c9, t11 CLA group (8 %) than in the other two groups (25 %) and might have been caused by the small amount of t10, c12 CLA present in the c9, t11 CLA preparation. Liver histology revealed that increased weight was due to hypertrophy. Markers of peroxisome proliferation, such as cyanide-insensitive palmitoyl CoA oxidase (EC 1.3.3.6) and carnitine acetyl transferase (EC 2.3.1.7) activities, were not increased by CLA. Both c9, t11 CLA and t10, c12 CLA were incorporated into phospholipids and triacylglycerols, but t10, c12 CLA only about half as much as c9, t11 CLA. In addition, linoleic acid and linolenic acid concentrations were lower in lipids of the t10, c12 CLA group compared with the c9, t11 CLA group. These data suggest that t10, c12 CLA stimulated the oxidation of all C18 polyunsaturated fatty acids. The results indicate that the t10, c12 CLA isomer, and not the so-called natural CLA isomer (c9, t11), is the active isomer affecting lipid levels in hamsters.

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