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  • Title: Effect of high-fat diet on lypolisis in isolated adipocytes from visceral and subcutaneous WAT.
    Author: Portillo MP, Simón E, García-Calonge MA, Del Barrio AS.
    Journal: Eur J Nutr; 1999 Aug; 38(4):177-82. PubMed ID: 10502029.
    Abstract:
    Variations in total energy intake and composition of daily food play an important role in the regulation of metabolic processes and so, in the control of body weight. This study was designed in order to investigate the effect of a high-fat diet on lipolysis in isolated adipocytes. For this purpose, fourteen Wistar rats were divided into two groups and fed either a standard-fat diet or a high-fat diet ad libitum for 7 weeks. Adipocytes were prepared from fat pads by collagenase digestion and incubated in vitro in the absence or presence of various lipolytic agents. Lipolysis was measured by the release of glycerol into the medium during 90 min of incubation. We observed that a high amount of fat in the diet induced an enlargement of adipose tissue, which was accompanied by a reduction of beta-adrenergic agonist-induced lipolysis, that could be due to a loss of beta(1) and beta(3)-adrenoceptor number or to alterations of their coupling to adenylate-cyclase through the guanine nucleotide regulatory protein. New data about regional differences were provided by comparing two adipose locations (subcutaneous and visceral).
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