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- W2108907495 abstract "Lipodystrophies are syndromes of adipose tissue degeneration associated with severe defects in lipid and glucose homeostasis. We report here the generation and analysis of Pparg ldi , a targeted allele that confers conditional dominant lipodystrophy in mice. The Pparg ldi allele was generated by insertion of the Tet activator (tTA) and a tTA-regulated Flag-Pparg1 transgene into the Pparg gene. Unexpectedly, tTA elicits mild lipodystrophy, insulin resistance, and dyslipidemia, and the Flag-PPARγ1 transgene surprisingly exacerbates these traits. Doxycycline can both completely prevent and reverse these phenotypes, providing a mouse model of inducible lipodystrophy. Embryonic fibroblasts from either Pparg ldi /+ or the phenotypically similar aP2-nSrebp1c ( Sr ) transgenic mice undergo robust adipogenesis, suggesting that neither strain develops lipodystrophy because of defective adipocyte differentiation. In addition, Pparg ldi /+ adipose tissue shares extensive gene expression aberrations with that of Sr mice, authenticating the phenotype at the molecular level and revealing a common expression signature of lipodystrophic fat. Thus, the Pparg ldi /+ mouse provides a conditional animal model for studying lipodystrophy and its associated physiology and gene expression." @default.
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- W2108907495 date "2007-10-16" @default.
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- W2108907495 title "A mouse model of conditional lipodystrophy" @default.
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- W2108907495 doi "https://doi.org/10.1073/pnas.0707797104" @default.
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