Conditionally immortalized white preadipocytes: a novel adipocyte model.
This study describes a novel approach to generate conditionally immortalized preadipocyte cell lines from white adipose tissue (IMWAT) that can be induced to differentiate into white adipocytes even after expansion in culture. Such adipocytes express markers of white fat such as peroxisome proliferator-activated receptor gamma and aP2 but not brown fat markers, have an intact insulin signaling pathway, and express proinflammatory cytokines. They can be readily transduced with adenoviral vectors, allowing them to be used to investigate the consequences of the depletion of specific adipocyte factors using short hairpin RNA. This approach has been used to study the effect of reduced expression of the nuclear receptor corepressor receptor interacting protein 140 (RIP140), a regulator of adipocyte function. The depletion of RIP140 results in changes in metabolic gene expression that resemble those in adipose tissue of the RIP140 null mouse. Thus, IMWAT cells provide a novel model for adipocytes that are derived from preadipocytes rather than fibroblasts and provide an alternative system to primary preadipocytes for the investigation of adipocyte function.
Institute of Reproductive and Developmental Biology, Imperial College London, London W12 0NN, United Kingdom.
D L
DL
Morganstein
M
M
Christian
J J O
JJ
Turner
M G
MG
Parker
R
R
White
D048868:Adaptor Proteins, Signal Transducing / Q000172:deficiency; D052438:Adipocytes, White / Q000166:cytology*; D000818:Animals; D018929:Cell Culture Techniques; D002454:Cell Differentiation; D002460:Cell Line; D051379:Mice; D008822:Mice, Transgenic; D009687:Nuclear Proteins / Q000172:deficiency; D000078723:Nuclear Receptor Interacting Protein 1; D014161:Transduction, Genetic
D048868:Adaptor Proteins, Signal Transducing; D009687:Nuclear Proteins; D000078723:Nuclear Receptor Interacting Protein 1