title: Conjugated linoleic acid reduces visceral and ectopic lipid accumulation and insulin resistance in chronic severe hypertriacylglycerolemia.
abstract: OBJECTIVE
  The metabolic health effects of conjugated linoleic acid (CLA), which is one of the principal polyunsaturated fatty acids, are controversial and still not fully accepted. The aim of this study was to examine the effects of CLA on adiposity, ectopic lipid accumulation, and insulin-resistant states in a metabolic syndrome model of non-obese hereditary rats with hypertriacylglycerolmia (HHTg).
  
  
  METHODS
  Groups of adult male HHTg rats were fed a high-carbohydrate diet (70% sucrose) with a 2% mixture of CLA isomers, or with the same amount of sunflower oil (control group) for 2 mo.
  
  
  RESULTS
  CLA supplementation decreased body weight gain (P < 0.05) and visceral adipose tissue weight (P < 0.01), and distinctively reduced serum triacylglycerols (P < 0.01) and triacylglycerol accumulation in the liver, heart, muscle, and aorta. CLA-treated rats exhibited increased insulin sensitivity in the adipose (P < 0.01), a higher release of fatty acids (P < 0.001), and increased adiponectin secretion (P < 0.01).In the skeletal muscle, CLA supplementation was associated with increased glucose oxidation (P < 0.01) and an elevated anti-inflammatory index (P < 0.05), according to phospholipid fatty acid composition. In the liver, CLA reduced the oxidized form of glutathione and elevated the activity of glutathione-dependent antioxidant enzymes.
  
  
  CONCLUSIONS
  Results suggest that CLA supplementation may protect against HHTg-induced dyslipidemia, ectopic lipid deposition, and insulin resistance. Increased glucose oxidation in the skeletal muscle as well as adiponectin secretion may play a role in the mechanism of the CLA action. Results suggest that CLA could reduce the negative consequences of HHTg and metabolic syndrome.
authors.affiliation: Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic. Electronic address: haml@ikem.cz.
authors.forename: Hana
authors.initials: H
authors.lastname: Malinska
authors.affiliation: Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.
authors.forename: Martina
authors.initials: M
authors.lastname: Hüttl
authors.affiliation: Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.
authors.forename: Olena
authors.initials: O
authors.lastname: Oliyarnyk
authors.affiliation: Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.
authors.forename: Miriam
authors.initials: M
authors.lastname: Bratova
authors.affiliation: Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.
authors.forename: Ludmila
authors.initials: L
authors.lastname: Kazdova
mesh_terms: D000273:Adipose Tissue / Q000187:drug effects / Q000378:metabolism; D000818:Animals; D001835:Body Weight / Q000187:drug effects; D004040:Dietary Carbohydrates / Q000008:administration & dosage / Q000009:adverse effects; D019587:Dietary Supplements; D004195:Disease Models, Animal; D005947:Glucose / Q000378:metabolism; D015228:Hypertriglyceridemia / Q000150:complications / Q000178:diet therapy* / Q000209:etiology; D007328:Insulin / Q000097:blood; D007333:Insulin Resistance; D044243:Linoleic Acids, Conjugated / Q000008:administration & dosage / Q000494:pharmacology*; D050356:Lipid Metabolism / Q000187:drug effects*; D008099:Liver / Q000187:drug effects / Q000378:metabolism; D008297:Male; D018482:Muscle, Skeletal / Q000187:drug effects / Q000378:metabolism; D010084:Oxidation-Reduction / Q000187:drug effects; D051381:Rats
chemical_list: D004040:Dietary Carbohydrates; D007328:Insulin; D044243:Linoleic Acids, Conjugated; D005947:Glucose
keywords: Conjugated linoleic acid; Fatty acid composition; Hypertriacylglycerolmic rats; Insulin sensitivity; Metabolic syndrome; Oxidative stress