Epigenetic control of cardiomyocyte production in response to a stress during the medaka heart development

Yusuke Taneda, Sayaka Konno, Shinji Makino, Mai Morioka, Keiichi Fukuda, Yoshiyuki Imai, Akira Kudo, Atsushi Kawakami

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The size and morphology of organs are largely determined by a genetic program. However in some cases, an epigenetic mechanism influences the process of organ development. Particularly, epigenetic factors such as hemodynamic stress and blood pressure affect the morphogenesis of cardiac chambers and valves. Here, we report that the epigenetic influences affect the cardiomyocyte production. Taking advantage of longer developmental period of medaka fish, we could examine the later emerging tissue responses to the defect of ventricular beating, which occurred in the hozuki (hoz) mutant that harbors the mutated ventricular myosin heavy chain (vmhc) gene. The mutant showed a remarkable ventricular enlargement, and we showed that this enlargement was due to an excess production of ventricular cardiomyocytes in addition to the lack of concentric chamber growth. By experimental blockade of blood flow, we demonstrated that an elevated cardiac pressure was responsible for the aberrant cardiomyocyte production. From these data, we propose that the epigenetic tissue response to a stressed situation controls the production of cardiomyocytes to attain a fine tuning of heart formation.

Original languageEnglish
Pages (from-to)30-40
Number of pages11
JournalDevelopmental Biology
Volume340
Issue number1
DOIs
Publication statusPublished - 2010 Apr 1

Keywords

  • Epigenetic regulation
  • Heart development
  • Medaka
  • Mutant
  • Myosin heavy chain
  • Transgenic

ASJC Scopus subject areas

  • Molecular Biology
  • Developmental Biology
  • Cell Biology

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