HIC2 regulates isoform switching during maturation of the cardiovascular system

Iain M. Dykes*, Kelly Lammerts van Bueren, Peter J. Scambler

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

4 Citations (Scopus)
201 Downloads (Pure)

Abstract

Physiological changes during embryonic development are associated with changes in the isoform expression of both myocyte sarcomeric proteins and of erythrocyte haemoglobins. Cell type-specific isoform expression of these genes also occurs. Although these changes appear to be coordinated, it is unclear how changes in these disparate cell types may be linked. The transcription factor Hic2 is required for normal cardiac development and the mutant is embryonic lethal. Hic2 embryos exhibit precocious expression of the definitive-lineage haemoglobin Hbb-bt in circulating primitive erythrocytes and of foetal isoforms of cardiomyocyte genes (creatine kinase, Ckm, and eukaryotic elongation factor Eef1a2) as well as ectopic cardiac expression of fast-twitch skeletal muscle troponin isoforms. We propose that HIC2 regulates a switching event within both the contractile machinery of cardiomyocytes and the oxygen carrying systems during the developmental period where demands on cardiac loading change rapidly.
Original languageEnglish
Pages (from-to)29-37
Number of pages9
JournalJournal of Molecular and Cellular Cardiology
Volume114
Early online date20 Oct 2017
DOIs
Publication statusPublished - Jan 2018

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Keywords

  • Congenital heart disease
  • Embryonic development
  • Haemoglobin
  • Troponin
  • Creatine kinase
  • Myoglobin

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