Muller_2003_Biochimie_85_1245

Reference

Title : Analysis of lipolysis in adipocytes using a fluorescent fatty acid derivative - Muller_2003_Biochimie_85_1245
Author(s) : Muller G , Jordan H , Jung C , Kleine H , Petry S
Ref : Biochimie , 85 :1245 , 2003
Abstract :

For facilitation of the experimental analysis of the mechanism and regulation of mobilization of fatty acids from adipose triacylglycerol (TAG) stores, which also represents important targets for pharmacological intervention with the pathogenesis of diabetes and obesity, we developed a convenient and reliable non-radioactive cell-based assay. Isolated rat adipocytes are incubated with the fluorescent fatty acid derivative, 12-((7-nitrobenz-2-oxa-1,3-diazol-4-yl)amino)dodecanoic acid (NBD-FA), in the presence of insulin. The resulting NBD-FA-labeled TAG is efficiently cleaved by hormone-sensitive lipase (HSL) in vitro. After removal of insulin and excess of free NBD-FA, lipolysis is initiated by addition of isoproterenol and/or adenosine deaminase. The amount of NBD-FA generated in total or released into the incubation medium in the presence of modulatory hormones or compounds is then monitored by thin layer chromatography and fluorescence imaging. Release of NBD-FA, glycerol and [3H]oleic acid from TAG follows similar kinetics and concentration dependence in response to various lipolytic and anti-lipolytic stimuli as well as inhibitors of HSL. Release of NBD-FA from adipocytes correlates well to translocation of HSL from the cytosol to TAG droplets. In addition, we found that a cell-free system consisting of NBD-FA-labeled TAG droplets with endogenous associated HSL closely reflects the lipolytic state of the adipocytes used for its preparation. In conclusion, release of NBD-FA from TAG in vivo and in vitro can be used as accurate index for (regulation of) lipolysis in primary and cultured adipocytes.

PubMedSearch : Muller_2003_Biochimie_85_1245
PubMedID: 14739077

Related information

Substrate NBD-MAG

Citations formats

Muller G, Jordan H, Jung C, Kleine H, Petry S (2003)
Analysis of lipolysis in adipocytes using a fluorescent fatty acid derivative
Biochimie 85 :1245

Muller G, Jordan H, Jung C, Kleine H, Petry S (2003)
Biochimie 85 :1245