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PPAR gamma is required for placental, cardiac, and adipose tissue development.

Molecular cell | Oct 26, 1999

The nuclear hormone receptor PPAR gamma promotes adipogenesis and macrophage differentiation and is a primary pharmacological target in the treatment of type II diabetes. Here, we show that PPAR gamma gene knockout results in two independent lethal phases. Initially, PPAR gamma deficiency interferes with terminal differentiation of the trophoblast and placental vascularization, leading to severe myocardial thinning and death by E10.0. Supplementing PPAR gamma null embryos with wild-type placentas via aggregation with tetraploid embryos corrects the cardiac defect, implicating a previously unrecognized dependence of the developing heart on a functional placenta. A tetraploid-rescued mutant surviving to term exhibited another lethal combination of pathologies, including lipodystrophy and multiple hemorrhages. These findings both confirm and expand the current known spectrum of physiological functions regulated by PPAR gamma.

Pubmed ID: 10549290 RIS Download

Mesh terms: Adipose Tissue | Animals | Cell Differentiation | Fetal Viability | Gene Expression Regulation, Developmental | Gene Targeting | Genes, Reporter | Heart | In Situ Hybridization | Lipodystrophy | Liver | Mice | Mice, Knockout | Myocardium | Nuclear Proteins | Placenta | Placentation | Ploidies | RNA, Messenger | Receptors, Cytoplasmic and Nuclear | Receptors, Retinoic Acid | Retinoid X Receptors | Transcription Factors

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Associated grants

  • Agency: NICHD NIH HHS, Id: HD27183
  • Agency: NCRR NIH HHS, Id: RR04050

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