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  • 标题:An inhibitory role of progerin in the gene induction network of adipocyte differentiation from iPS cells
  • 本地全文:下载
  • 作者:Zheng-Mei Xiong ; Christina LaDana ; Di Wu
  • 期刊名称:Aging
  • 出版年度:2013
  • 卷号:5
  • 期号:4
  • 页码:288-303
  • 出版社:U.S.Department of Health & Human Service
  • 摘要:

    Lipodystrophies, characterized by partial or complete loss of adipose tissue, have been associated with mutations in the lamin A gene. It remains unclear how lamin A mutants interfere with adipose tissue formation. Hutchinson-Gilford progeria syndrome (HGPS) presents the most severe form of lamin A-associated diseases, whose patients show a complete loss of subcutaneous fat. Using iPSCs reprogrammed from HGPS fibroblasts, we induced adipocyte formation from iPSC derived embryoid bodies or from iPSC derived mesenchymal stem cells. Both approaches revealed a severe lipid storage defect in HGPS cells at late differentiation stage, faithfully recapitulating HGPS patient phenotype. Expression analysis further indicated that progerin inhibited the transcription activation of PPARγ2 and C/EBPα, but had little effects on the early adipogenic regulators. Our experiments demonstrate two comparable approaches ofin vitro modeling lipodystrophies with patient-specific iPSCs, and support a regulatory role of lamin A in the terminal differentiation stage of adipogenesis.

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  • 关键词:adipogenesis; aging; lamin A; Progeria; iPSC
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