Retinoic acid-mediated activation of HNF-3 alpha during EC stem cell differentiation

Nucleic Acids Res. 1994 Jun 11;22(11):2126-33. doi: 10.1093/nar/22.11.2126.

Abstract

We present evidence demonstrating that the liver-enriched transcription factor HNF-3 alpha is activated upon retinoic acid-induced differentiation of mouse F9 embryonal carcinoma cells. We have detected increases in the DNA binding activity and mRNA level of HNF-3 alpha. Both are reflections of the actual activation mechanism at the level of transcriptional initiation, which we showed with the help of HNF-3 alpha promoter constructs. Time course studies clearly show that HNF-3 alpha activation is a transient event. Employing Northern blots, HNF-3 alpha mRNA can be detected between 16 and 24 hours post-differentiation, reaches its zenith at approximately 1 day, and then declines to virtually undetectable levels. F9 cells can give rise to three distinct differentiated cell types; visceral endoderm, parietal endoderm, and primitive endoderm. We have clearly shown that HNF-3 alpha stimulation occurs upon primitive endoderm formation. In addition, the transcription factor is also activated during the induction of cell lineages that give rise to parietal and visceral endoderm. HNF-3 alpha stimulation upon visceral endoderm differentiation is accompanied by the activation of HNF-3 target genes such as transthyretin, suggesting that HNF-3 alpha is involved in the developmental activation of this gene. In contrast, HNF-3 alpha target genes in parietal and primitive endoderm have yet to be identified. However, the stimulation of HNF-3 alpha during primitive endoderm formation, which is an extremely early event during murine embryogenesis, points towards a role for the factor in crucial determination processes that occur early during development.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Base Sequence
  • Carcinoma, Embryonal
  • Cell Differentiation
  • DNA / metabolism
  • DNA-Binding Proteins / genetics
  • DNA-Binding Proteins / metabolism*
  • Gene Expression Regulation
  • Hepatocyte Nuclear Factor 3-alpha
  • Mice
  • Molecular Sequence Data
  • Nuclear Proteins / genetics
  • Nuclear Proteins / metabolism*
  • Promoter Regions, Genetic
  • Protein Binding
  • RNA, Messenger / analysis
  • Stem Cells / cytology
  • Stem Cells / metabolism*
  • Transcription Factors / metabolism*
  • Tretinoin / metabolism*
  • Tumor Cells, Cultured

Substances

  • DNA-Binding Proteins
  • Foxa1 protein, mouse
  • Hepatocyte Nuclear Factor 3-alpha
  • Nuclear Proteins
  • RNA, Messenger
  • Transcription Factors
  • Tretinoin
  • DNA