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Imai, T. et al.

Impaired adipogenesis and lipolysis in the mouse upon selective ablation of the retinoid X receptor alpha mediated by a tamoxifen-inducible chimeric Cre recombinase (Cre-ERT2) in adipocytes.

Retinoid X receptor alpha (RXRalpha) is involved in multiple signaling pathways, as a heterodimeric partner of several nuclear receptors. To investigate its function in energy homeostasis, we have selectively ablated the RXRalpha gene in adipocytes of 4-week-old transgenic mice by using the tamoxifen-inducible Cre-ERT2 recombination system. Mice lacking RXRalpha in adipocytes were resistant to dietary and chemically induced obesity and impaired in fasting-induced lipolysis. Our results also indicate that RXRalpha is involved in adipocyte differentiation. Thus, our data demonstrate the feasibility of adipocyte-selective temporally controlled gene engineering and reveal a central role of RXRalpha in adipogenesis, probably as a heterodimeric partner for peroxisome proliferator-activated receptor gamma.[1]

References

Impaired adipogenesis and lipolysis in the mouse upon selective ablation of the retinoid X receptor alpha mediated by a tamoxifen-inducible chimeric Cre recombinase (Cre-ERT2) in adipocytes. Imai, T., Jiang, M., Chambon, P., Metzger, D. Proc. Natl. Acad. Sci. U.S.A. (2001) [Pubmed]

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