Correlation between Shh expression and DNA methylation status of the limb-specific Shh enhancer region during limb regeneration in amphibians

Nayuta Yakushiji, Makoto Suzuki, Akira Satoh, Tomoko Sagai, Toshihiko Shiroishi, Hisato Kobayashi, Hiroyuki Sasaki, Hiroyuki Ide, Koji Tamura

研究成果: Contribution to journalArticle査読

90 被引用数 (Scopus)

抄録

The Xenopus adult limb has very limited regeneration ability, and only a simple cartilaginous spike structure without digits is formed after limb amputation. We found that expression of Shh and its downstream genes is absent from the regenerating blastema of the Xenopus froglet limb. Moreover, we found that a limb enhancer region of the Shh gene is highly methylated in the froglet, although the sequence is hypomethylated in the Xenopus tadpole, which has complete limb regeneration ability. These findings, together with the fact that the promoter region of Shh is hardly methylated in Xenopus, suggest that regenerative failure (deficiency in repatterning) in the Xenopus adult limb is associated with methylation status of the enhancer region of Shh and that a target-specific epigenetic regulation is involved in gene re-activation for repatterning during the Xenopus limb regeneration process. Because the methylation level of the enhancer region was low in other amphibians that have Shh expression in the blastemas, a low methylation status may be the basic condition under which transcriptional regulation of Shh expression can progress during the limb regeneration process. These findings provide the first evidence for a relationship between epigenetic regulation and pattern formation during organ regeneration in vertebrates.

本文言語英語
ページ(範囲)171-182
ページ数12
ジャーナルDevelopmental Biology
312
1
DOI
出版ステータス出版済み - 12 1 2007
外部発表はい

All Science Journal Classification (ASJC) codes

  • 分子生物学
  • 発生生物学
  • 細胞生物学

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