A histone demethylase is necessary for regeneration in zebrafish

Scott Stewart, Zhi Yang Tsun, Juan Carlos Izpisua Belmonte

Research output: Contribution to journalArticlepeer-review

85 Scopus citations

Abstract

Urodele amphibians and teleost fish regenerate amputated body parts via a process called epimorphic regeneration. A hallmark of this phenomenon is the reactivation of silenced developmental regulatory genes that previously functioned during embryonic patterning. We demonstrate that histone modifications silence promoters of numerous genes involved in zebrafish caudal fin regeneration. Silenced developmental regulatory genes contain bivalent me3K4/me3K27 H3 histone modifications created by the concerted action of Polycomb (PcG) and Trithorax histone methyltransferases. During regeneration, this silent, bivalent chromatin is converted to an active state by loss of repressive me3K27 H3 modifications, occurring at numerous genes that appear to function during regeneration. Loss-of-function studies demonstrate a requirement for a me3K27 H3 demethylase during fin regeneration. These results indicate that histone modifications at discreet genomic positions may serve as a crucial regulatory event in the initiation of fin regeneration.

Original languageEnglish (US)
Pages (from-to)19889-19894
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume106
Issue number47
DOIs
StatePublished - Nov 24 2009

Keywords

  • Chromatin
  • Polycomb

ASJC Scopus subject areas

  • General

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