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Originally published In Press as doi:10.1194/jlr.D500037-JLR200 on November 30, 2005
Journal of Lipid Research, Vol. 47, 450-460, February 2006
Copyright © 2006 by American Society for Biochemistry and Molecular Biology
OP9 mouse stromal cells rapidly differentiate into adipocytes: characterization of a useful new model of adipogenesis
Nathan E. Wolins*,
Benjamin K. Quaynor*,
James R. Skinner*,
Anatoly Tzekov*,
Changwon Park ,
Kyunghee Choi and
Perry E. Bickel1,*,
* Division of Endocrinology, Metabolism, and Lipid Research, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110
Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, MO 63110
Published, JLR Papers in Press, November 30, 2005
1 To whom correspondence should be addressed. e-mail: pbickel{at}im.wustl.edu
Much knowledge of adipocyte biology has been learned from cell culture models, most notably 3T3-L1 cells. The 3T3-L1 model has several limitations, including the requirement of 2 weeks to generate adipocytes and the waning of adipogenic potential in culture. We have investigated the capacity of OP9 cells, a line of bone marrow-derived mouse stromal cells, to recapitulate adipogenesis. When OP9 cells are given any one of three adipogenic stimuli, they rapidly accumulate triacylglycerol, assume adipocyte morphology, and express adipocyte late marker proteins, including glucose transporter 4 and adiponectin. OP9 cells can differentiate into adipocytes within 2 days. This rapid rate of differentiation allows for the detection of transiently expressed proteins in mature OP9 adipocytes. Adipogenesis in OP9 cells involves the master transcriptional regulator of adipocyte differentiation, peroxisome proliferator-activated receptor (PPAR ). OP9 cells are late preadipocytes in that, before the addition of adipogenic stimuli, they express the adipocyte proteins CCAAT/enhancer binding proteins and ß, PPAR , sterol-regulatory element binding protein-1, S3-12, and perilipin. OP9 differentiation is not diminished by maintenance in culture at high cell density or by long periods in continuous culture, thereby facilitating the generation of stable cell lines that retain adipogenic potential. Thus, the unique features of OP9 cells will expedite the study of adipocyte biology.
Abbreviations: ADC, adipogenic cocktail; BMP-4, bone morphogenic protein 4; C/EBP, CCAAT/enhancer binding protein; DN, dominant negative; eGFP-perilipin, perilipin tagged at its N terminus with enhanced green fluorescent protein; GLUT4, glucose transporter 4; IO, insulin oleate; M-CSF, macrophage colony-stimulating factor; PPAR , peroxisome proliferator-activated receptor ; SR, serum replacement; SREBP, sterol-regulatory element binding protein; SSC, side scatter; TAG, triacylglycerol Supplementary key words bone marrow flow cytometry transfection triacylglycerol glucose transporter 4 glucose uptake peroxisome proliferator-activated receptor S3-12 perilipin 3T3-L1

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Copyright © 2006 by the American Society for Biochemistry and Molecular Biology.
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