Embryonic activation and developmental expression of the murine prion protein gene

G Miele, Richard Alejo-Blanco, H Baybutt, S Horvat, J Manson, M Clinton

Research output: Contribution to journalArticlepeer-review


While it is well established that cellular prion protein (PrP(C)) expression is required for the development of transmissible spongiform encephalopathies (TSEs), the physiological function of PrP(C) has yet to be determined. A number of studies have examined PrP expression in different tissues and in the later stages of embryonic development. However, the relative levels of expression of PrP RNA and protein in tissues outside the central nervous system (CNS) is not well documented and the exact point of transcriptional activation of PrP during embryogenesis is unknown. We have studied PrP mRNA expression in murine embryos and both mRNA and protein expression in a variety of adult tissues. PrP RNA was detected at different levels in all tissues tested while PrP(C) protein was detectable in all adult tissues tested with the exception of kidney and liver. RNA and protein levels were also assessed at four points during postnatal brain development and levels of both were seen to increase with development. We also established that, during embryogenesis, induction of PrP RNA expression occurs between E8.5 and E9, during the period of transition from anaerobic to aerobic metabolism. Preliminary experiments investigating the effects of superoxide radicals on PrP expression in cultured neuroblastoma and astrocyte cells support the suggestion that PrP(C) forms part of a cellular antioxidant defense mechanism.
Original languageEnglish
Pages (from-to)1-12
Number of pages12
JournalGene Expression: International Journal of Molecular and Cellular Science
Issue number1
Publication statusPublished - 2003


  • Aging/genetics
  • Aging/metabolism
  • Animals
  • Animals, Newborn
  • Antioxidants/metabolism
  • Brain/embryology
  • Brain/growth & development
  • Brain/metabolism
  • Cell Differentiation/drug effects
  • Cell Differentiation/genetics
  • Cells, Cultured
  • Embryo, Mammalian/embryology
  • Embryo, Mammalian/metabolism
  • Energy Metabolism/genetics
  • Fetus
  • Gene Expression Regulation, Developmental
  • Mice
  • Mice, Inbred C57BL
  • Mice, Knockout
  • Oxidative Stress/drug effects
  • Oxidative Stress/genetics
  • PrPC Proteins
  • Prion Diseases/genetics
  • RNA, Messenger/drug effects
  • RNA, Messenger/metabolism
  • Superoxides/pharmacology
  • Transcriptional Activation
  • Viscera/embryology
  • Viscera/metabolism


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