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Downregulation of PGC-1 Prevents the Beneficial Effect of EET-Heme Oxygenase-1 on Mitochondrial Integrity and Associated Metabolic Function in Obese Mice. | LitMetric

. Obesity and metabolic syndrome and associated adiposity are a systemic condition characterized by increased mitochondrial dysfunction, inflammation, and inhibition of antioxidant genes, HO-1, and EETs levels. We postulate that EETs attenuate adiposity by stimulating mitochondrial function and induction of HO-1 via activation of PGC-1 in adipose and hepatic tissue. . Cultured murine adipocytes and mice fed a high fat (HF) diet were used to assess the functional relationship among EETs, PGC-1, HO-1, and mitochondrial signaling using an EET-agonist (EET-A) and PGC-1-deficient cells and mice using lentiviral PGC-1(sh). . EET-A is a potent inducer of PGC-1, HO-1, mitochondrial biogenesis (cytochrome oxidase subunits 1 and 4 and SIRT3), fusion proteins (Mfn 1/2 and OPA1) and fission proteins (DRP1 and FIS1) ( < 0.05), fasting glucose, BW, and blood pressure. These beneficial effects were prevented by administration of lenti-PGC-1(sh). EET-A administration prevented HF diet induced mitochondrial and dysfunction in adipose tissue and restored VO effects that were abrogated in PGC-1-deficient mice. . EET is identified as an upstream positive regulator of PGC-1 that leads to increased HO-1, decreased BW and fasting blood glucose and increased insulin receptor phosphorylation, that is, increased insulin sensitivity and mitochondrial integrity, and possible use of EET-agonist for treatment of obesity and metabolic syndrome.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5206458PMC
http://dx.doi.org/10.1155/2016/9039754DOI Listing

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