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  • Title: Downregulation of lipogenesis and fatty acid oxidation in the subcutaneous adipose tissue of morbidly obese women.
    Author: Auguet T, Guiu-Jurado E, Berlanga A, Terra X, Martinez S, Porras JA, Ceausu A, Sabench F, Hernandez M, Aguilar C, Sirvent JJ, Del Castillo D, Richart C.
    Journal: Obesity (Silver Spring); 2014 Sep; 22(9):2032-8. PubMed ID: 24931172.
    Abstract:
    OBJECTIVE: The aim of this study was to analyse the expression of crucial genes in fatty acid metabolism in visceral (VAT) and subcutaneous (SAT) adipose tissue samples from morbidly obese women. METHODS: The VAT and SAT expression of key genes in 145 morbidly obese women (MO, BMI > 40 Kg/m(2) ) and 18 normal weight control women by RT-PCR and Western Blot was analyzed. RESULTS: In SAT, the expression levels of the genes related to lipogenesis and fatty acid oxidation were significantly lower in MO than in controls. In VAT, most of the lipogenic genes studied had similar expression levels in MO and control cohort. Regarding inflammation, IL6 was significantly higher in MO in both tissues whereas TNFα mRNA expression was significantly higher only in VAT. CONCLUSIONS: Our results indicate that in morbidly obese patients, lipogenesis and fatty acid oxidation are downregulated in SAT, whereas in VAT these pathways are almost unchanged. By contrast, inflammation is induced in both adipose tissues. It is hypothesized that, in this type of extreme obesity, SAT works to limit any further development of fat mass, decreasing the expression of lipogenic and FA oxidative genes whereas VAT depot might have lost this capability.
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