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    Lessons on Conditional Gene Targeting in Mouse Adipose Tissue

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    Author
    Lee, KY; Russell, SJ; Ussar, S; Boucher, J; Vernochet, C; Mori, MA; Smyth, G; Rourk, M; Cederquist, C; Rosen, ED; ...
    Date
    2013-03-01
    Source Title
    Diabetes
    Publisher
    AMER DIABETES ASSOC
    University of Melbourne Author/s
    Smyth, Gordon
    Affiliation
    School of Mathematics and Statistics
    Metadata
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    Document Type
    Journal Article
    Citations
    Lee, K. Y., Russell, S. J., Ussar, S., Boucher, J., Vernochet, C., Mori, M. A., Smyth, G., Rourk, M., Cederquist, C., Rosen, E. D., Kahn, B. B. & Kahn, C. R. (2013). Lessons on Conditional Gene Targeting in Mouse Adipose Tissue. DIABETES, 62 (3), pp.864-874. https://doi.org/10.2337/db12-1089.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/254704
    DOI
    10.2337/db12-1089
    Abstract
    Conditional gene targeting has been extensively used for in vivo analysis of gene function in adipocyte cell biology but often with debate over the tissue specificity and the efficacy of inactivation. To directly compare the specificity and efficacy of different Cre lines in mediating adipocyte specific recombination, transgenic Cre lines driven by the adipocyte protein 2 (aP2) and adiponectin (Adipoq) gene promoters, as well as a tamoxifen-inducible Cre driven by the aP2 gene promoter (iaP2), were bred to the Rosa26R (R26R) reporter. All three Cre lines demonstrated recombination in the brown and white fat pads. Using different floxed loci, the individual Cre lines displayed a range of efficacy to Cre-mediated recombination that ranged from no observable recombination to complete recombination within the fat. The Adipoq-Cre exhibited no observable recombination in any other tissues examined, whereas both aP2-Cre lines resulted in recombination in endothelial cells of the heart and nonendothelial, nonmyocyte cells in the skeletal muscle. In addition, the aP2-Cre line can lead to germline recombination of floxed alleles in ~2% of spermatozoa. Thus, different "adipocyte-specific" Cre lines display different degrees of efficiency and specificity, illustrating important differences that must be taken into account in their use for studying adipose biology.

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