The Spatiotemporal Pattern and Intensity of p53 Activation Dictates Phenotypic Diversity in p53-Driven Developmental Syndromes

Margot E Bowen, Jacob McClendon, Hannah K Long, Aryo Sorayya, Jeanine L Van Nostrand, Joanna Wysocka, Laura D Attardi

Research output: Contribution to journalArticlepeer-review

Abstract

Inappropriate activation of the p53 transcription factor contributes to numerous developmental syndromes characterized by distinct constellations of phenotypes. How p53 drives exquisitely specific sets of symptoms in diverse syndromes, however, remains enigmatic. Here, we deconvolute the basis of p53-driven developmental syndromes by leveraging an array of mouse strains to modulate the spatial expression pattern, temporal profile, and magnitude of p53 activation during embryogenesis. We demonstrate that inappropriate p53 activation in the neural crest, facial ectoderm, anterior heart field, and endothelium induces distinct spectra of phenotypes. Moreover, altering the timing and degree of p53 hyperactivation substantially affects the phenotypic outcomes. Phenotypes are associated with p53-driven cell-cycle arrest or apoptosis, depending on the cell type, with gene expression programs, rather than extent of mitochondrial priming, largely governing the specific response. Together, our findings provide a critical framework for decoding the role of p53 as a mediator of diverse developmental syndromes.

Original languageEnglish
Pages (from-to)212-228.e6
JournalDevelopmental Cell
Volume50
Issue number2
DOIs
Publication statusPublished - 22 Jul 2019

Keywords

  • Animals
  • Apoptosis
  • Cardiovascular Diseases/genetics
  • Cell Cycle Checkpoints
  • Embryo, Mammalian/metabolism
  • Embryonic Development
  • Female
  • Gene Expression Regulation, Developmental
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Mice, Knockout
  • Mitochondria/metabolism
  • Neural Crest/metabolism
  • Phenotype
  • Spatio-Temporal Analysis
  • Tumor Suppressor Protein p53/physiology

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