title: Association Between Aerobic Exercise and Rosiglitazone Avoided the NAFLD and Liver Inflammation Exacerbated in PPAR-α Knockout Mice.
abstract: Nonalcoholic fatty liver disease (NAFLD) is one of the main liver diseases today, and may progress to steatohepatitis, cirrhosis, and hepatocellular carcinoma. Some studies have shown the beneficial effects of aerobic exercise on reversing NAFLD. To verify whether chronic aerobic exercise improves the insulin resistance, liver inflammation, and steatohepatitis caused by a high fat diet (HF) and whether PPARα is involved in these actions. C57BL6 wild type (WT) and PPAR-α knockout (KO) mice were fed with a standard diet (SD) or HF during 12 weeks; the HF mice were trained on a treadmill during the last 8 weeks. Serum glucose and insulin tolerances, serum levels of aspartate aminotransferase, hepatic content of triacylglycerol, cytokines, gene expression, and protein expression were evaluated in all animals. Chronic exposure to HF diet increased triacylglycerol accumulation in the liver, leading to NAFLD, increased aminotransferase in the serum, increased peripheral insulin resistance, and higher adiposity index. Exercise reduced all these parameters in both animal genotypes. The liver lipid accumulation was not associated with inflammation; trained KO mice, however, presented a huge inflammatory response that was probably caused by a decrease in PPAR-γ expression. We conclude that exercise improved the damage caused by a HF independently of PPARα, apparently by a peripheral fatty acid oxidation in the skeletal muscle. We also found that the absence of PPARα together with exercise leads to a decrease in PPAR-γ and a huge inflammatory response. J. Cell. Physiol. 232: 1008-1019, 2017. © 2016 Wiley Periodicals, Inc.
authors.affiliation: Department of Cell and Developmental Biology, University of São Paulo, São Paulo, Brazil.
authors.forename: Helena A P
authors.initials: HA
authors.lastname: Batatinha
authors.affiliation: Department of Cell and Developmental Biology, University of São Paulo, São Paulo, Brazil.
authors.forename: Edson A
authors.initials: EA
authors.lastname: Lima
authors.affiliation: Department of Cell and Developmental Biology, University of São Paulo, São Paulo, Brazil.
authors.forename: Alexandre A S
authors.initials: AA
authors.lastname: Teixeira
authors.affiliation: Department of Cell and Developmental Biology, University of São Paulo, São Paulo, Brazil.
authors.forename: Camila O
authors.initials: CO
authors.lastname: Souza
authors.affiliation: Department of Cell and Developmental Biology, University of São Paulo, São Paulo, Brazil.
authors.forename: Luana A
authors.initials: LA
authors.lastname: Biondo
authors.affiliation: Exercise and Immunometabolism Research Group, Department of Physical Education, Univer. Estadual Paulista (UNESP), Presidente Prudente, São Paulo, Brazil.
authors.forename: Loreana S
authors.initials: LS
authors.lastname: Silveira
authors.affiliation: Exercise and Immunometabolism Research Group, Department of Physical Education, Univer. Estadual Paulista (UNESP), Presidente Prudente, São Paulo, Brazil.
authors.forename: Fabio S
authors.initials: FS
authors.lastname: Lira
authors.affiliation: Department of Cell and Developmental Biology, University of São Paulo, São Paulo, Brazil.
authors.forename: José C
authors.initials: JC
authors.lastname: Rosa Neto
mesh_terms: D000818:Animals; D001835:Body Weight; D018450:Disease Progression; D005215:Fasting / Q000097:blood; D007249:Inflammation / Q000097:blood / Q000150:complications / Q000188:drug therapy* / Q000235:genetics; D008055:Lipids / Q000097:blood; D008099:Liver / Q000378:metabolism / Q000473:pathology*; D008297:Male; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D065626:Non-alcoholic Fatty Liver Disease / Q000097:blood / Q000150:complications / Q000188:drug therapy* / Q000235:genetics; D009929:Organ Size; D047493:PPAR alpha / Q000172:deficiency* / Q000378:metabolism; D010766:Phosphorylation; D010805:Physical Conditioning, Animal; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D000077154:Rosiglitazone; D045162:Thiazolidinediones / Q000627:therapeutic use*
chemical_list: D008055:Lipids; D047493:PPAR alpha; D012333:RNA, Messenger; D045162:Thiazolidinediones; D000077154:Rosiglitazone