Pulsatile patterns of pituitary hormone gene expression change during development

Karen Featherstone, Claire V. Harper, Anne McNamara, Sabrina Semprini, David G. Spiller, Judith McNeilly, Alan S. McNeilly, John J. Mullins, Michael R.H. White*, Julian R.E. Davis

*Corresponding author for this work

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Important questions in biology have emerged recently concerning the timing of transcription in living cells. Studies on clonal cell lines have shown that transcription is often pulsatile and stochastic, with implications for cellular differentiation. Currently, information regarding transcriptional activity at cellular resolution within a physiological context remains limited. To investigate single-cell transcriptional activity in real-time in living tissue we used bioluminescence imaging of pituitary tissue from transgenic rats in which luciferase gene expression is driven by a pituitary hormone gene promoter. We studied fetal and neonatal pituitary tissue to assess whether dynamic patterns of transcription change during tissue development. We show that gene expression in single cells is highly pulsatile at the time endocrine cells first appear but becomes stabilised as the tissue develops in early neonatal life. This stabilised transcription pattern might depend upon tissue architecture or paracrine signalling, as isolated cells, generated from enzymatic dispersion of the tissue, display pulsatile luminescence. Nascent cells in embryonic tissue also showed coordinated transcription activity over short distances further indicating that cellular context is important for transcription activity. Overall, our data show that cells alter their patterns of gene expression according to their context and developmental stage, with important implications for cellular differentiation.

Original languageEnglish
Pages (from-to)3484-3491
Number of pages8
JournalJournal of Cell Science
Volume124
Issue number20
Early online date1 Oct 2011
DOIs
Publication statusPublished - 1 Oct 2011

Keywords

  • Development
  • Microscopy
  • Pituitary
  • Prolactin
  • Transcription

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    Featherstone, K., Harper, C. V., McNamara, A., Semprini, S., Spiller, D. G., McNeilly, J., McNeilly, A. S., Mullins, J. J., White, M. R. H., & Davis, J. R. E. (2011). Pulsatile patterns of pituitary hormone gene expression change during development. Journal of Cell Science, 124(20), 3484-3491. https://doi.org/10.1242/jcs.088500